[glib] gdbus-codegen: Split C header and code generation



commit 22772acff8fa4bc23b9838c2bc99cefbbbc76230
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Thu Jan 4 09:56:59 2018 +0100

    gdbus-codegen: Split C header and code generation
    
    The class that generated both C header and code has been split into
    two classes. These clases are now specialized on creating the header
    or the body code.
    
    All parameters that do not belong to each class have also been
    deleted, so only the necessary parameters still remain. These also
    includes the header and code file descriptors, leaving only the
    corresponding file descriptor necessary for each class.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791015

 gio/gdbus-2.0/codegen/codegen.py      | 4672 +++++++++++++++++----------------
 gio/gdbus-2.0/codegen/codegen_main.py |   32 +-
 2 files changed, 2360 insertions(+), 2344 deletions(-)
---
diff --git a/gio/gdbus-2.0/codegen/codegen.py b/gio/gdbus-2.0/codegen/codegen.py
index a517703..543c41e 100644
--- a/gio/gdbus-2.0/codegen/codegen.py
+++ b/gio/gdbus-2.0/codegen/codegen.py
@@ -3,6 +3,7 @@
 # GDBus - GLib D-Bus Library
 #
 # Copyright (C) 2008-2011 Red Hat, Inc.
+# Copyright (C) 2018 Iñigo Martínez <inigomartinez gmail com>
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -33,81 +34,79 @@ LICENSE_STR = '''/*
  * it was derived from.
  */\n'''
 
-# ----------------------------------------------------------------------------------------------------
+def generate_namespace(namespace):
+    ns = namespace
+    if len(namespace) > 0:
+        if utils.is_ugly_case(namespace):
+            ns = namespace.replace('_', '')
+            ns_upper = namespace.upper() + '_'
+            ns_lower = namespace.lower() + '_'
+        else:
+            ns_upper = utils.camel_case_to_uscore(namespace).upper() + '_'
+            ns_lower = utils.camel_case_to_uscore(namespace).lower() + '_'
+    else:
+        ns_upper = ''
+        ns_lower = ''
 
-class CodeGenerator:
-    def __init__(self, ifaces, namespace, interface_prefix, generate_objmanager,
-                 generate_autocleanup, docbook_gen, h, c, header_name,
-                 use_pragma):
-        self.docbook_gen = docbook_gen
+    return (ns, ns_upper, ns_lower)
+
+class HeaderCodeGenerator:
+    def __init__(self, ifaces, namespace, generate_objmanager,
+                 generate_autocleanup, header_name, use_pragma, outfile):
+        self.ifaces = ifaces
+        self.namespace, self.ns_upper, self.ns_lower = generate_namespace(namespace)
         self.generate_objmanager = generate_objmanager
         self.generate_autocleanup = generate_autocleanup
-        self.ifaces = ifaces
-        self.h = h
-        self.c = c
-        self.header_name = header_name
-        self.namespace = namespace
-        if len(namespace) > 0:
-            if utils.is_ugly_case(namespace):
-                self.namespace = namespace.replace('_', '')
-                self.ns_upper = namespace.upper() + '_'
-                self.ns_lower = namespace.lower() + '_'
-            else:
-                self.ns_upper = utils.camel_case_to_uscore(namespace).upper() + '_'
-                self.ns_lower = utils.camel_case_to_uscore(namespace).lower() + '_'
-        else:
-            self.ns_upper = ''
-            self.ns_lower = ''
-        self.interface_prefix = interface_prefix
         self.header_guard = header_name.upper().replace('.', '_').replace('-', '_').replace('/', 
'_').replace(':', '_')
         self.use_pragma = use_pragma
+        self.outfile = outfile
 
     # ----------------------------------------------------------------------------------------------------
 
     def generate_header_preamble(self):
-        self.h.write(LICENSE_STR.format(config.VERSION))
-        self.h.write('\n')
+        self.outfile.write(LICENSE_STR.format(config.VERSION))
+        self.outfile.write('\n')
 
         if self.use_pragma:
-            self.h.write('#pragma once\n')
+            self.outfile.write('#pragma once\n')
         else:
-            self.h.write('#ifndef __{!s}__\n'.format(self.header_guard))
-            self.h.write('#define __{!s}__\n'.format(self.header_guard))
+            self.outfile.write('#ifndef __{!s}__\n'.format(self.header_guard))
+            self.outfile.write('#define __{!s}__\n'.format(self.header_guard))
 
-        self.h.write('\n')
-        self.h.write('#include <gio/gio.h>\n')
-        self.h.write('\n')
-        self.h.write('G_BEGIN_DECLS\n')
-        self.h.write('\n')
+        self.outfile.write('\n')
+        self.outfile.write('#include <gio/gio.h>\n')
+        self.outfile.write('\n')
+        self.outfile.write('G_BEGIN_DECLS\n')
+        self.outfile.write('\n')
 
     # ----------------------------------------------------------------------------------------------------
 
     def declare_types(self):
         for i in self.ifaces:
-            self.h.write('\n')
-            self.h.write('/* ------------------------------------------------------------------------ */\n')
-            self.h.write('/* Declarations for %s */\n'%i.name)
-            self.h.write('\n')
+            self.outfile.write('\n')
+            self.outfile.write('/* ------------------------------------------------------------------------ 
*/\n')
+            self.outfile.write('/* Declarations for %s */\n'%i.name)
+            self.outfile.write('\n')
 
             # First the GInterface
-            self.h.write('#define %sTYPE_%s (%s_get_type ())\n'%(i.ns_upper, i.name_upper, i.name_lower))
-            self.h.write('#define %s%s(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_%s, %s))\n'%(i.ns_upper, 
i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %sIS_%s(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), %sTYPE_%s))\n'%(i.ns_upper, 
i.name_upper, i.ns_upper, i.name_upper))
-            self.h.write('#define %s%s_GET_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), %sTYPE_%s, 
%sIface))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('\n')
-            self.h.write('struct _%s;\n'%(i.camel_name))
-            self.h.write('typedef struct _%s %s;\n'%(i.camel_name, i.camel_name))
-            self.h.write('typedef struct _%sIface %sIface;\n'%(i.camel_name, i.camel_name))
-            self.h.write('\n')
-            self.h.write('struct _%sIface\n'%(i.camel_name))
-            self.h.write('{\n')
-            self.h.write('  GTypeInterface parent_iface;\n')
+            self.outfile.write('#define %sTYPE_%s (%s_get_type ())\n'%(i.ns_upper, i.name_upper, 
i.name_lower))
+            self.outfile.write('#define %s%s(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_%s, 
%s))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %sIS_%s(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_%s))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+            self.outfile.write('#define %s%s_GET_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), %sTYPE_%s, 
%sIface))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%s;\n'%(i.camel_name))
+            self.outfile.write('typedef struct _%s %s;\n'%(i.camel_name, i.camel_name))
+            self.outfile.write('typedef struct _%sIface %sIface;\n'%(i.camel_name, i.camel_name))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sIface\n'%(i.camel_name))
+            self.outfile.write('{\n')
+            self.outfile.write('  GTypeInterface parent_iface;\n')
 
             function_pointers = {}
 
             # vfuncs for methods
             if len(i.methods) > 0:
-                self.h.write('\n')
+                self.outfile.write('\n')
                 for m in i.methods:
                     unix_fd = False
                     if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
@@ -125,7 +124,7 @@ class CodeGenerator:
 
             # vfuncs for signals
             if len(i.signals) > 0:
-                self.h.write('\n')
+                self.outfile.write('\n')
                 for s in i.signals:
                     key = (s.since, '_signal_%s'%s.name_lower)
                     value  = '  void (*%s) (\n'%(s.name_lower)
@@ -137,7 +136,7 @@ class CodeGenerator:
 
             # vfuncs for properties
             if len(i.properties) > 0:
-                self.h.write('\n')
+                self.outfile.write('\n')
                 for p in i.properties:
                     key = (p.since, '_prop_get_%s'%p.name_lower)
                     value = '  %s (*get_%s) (%s *object);\n\n'%(p.arg.ctype_in, p.name_lower, i.camel_name)
@@ -153,615 +152,634 @@ class CodeGenerator:
             # See https://bugzilla.gnome.org/show_bug.cgi?id=647577#c5
             # for discussion
             for key in sorted(function_pointers.keys(), key=utils.version_cmp_key):
-                self.h.write('%s'%function_pointers[key])
+                self.outfile.write('%s'%function_pointers[key])
 
-            self.h.write('};\n')
-            self.h.write('\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
             if self.generate_autocleanup == 'all':
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%s, g_object_unref)\n' % (i.camel_name))
-                self.h.write('#endif\n')
-                self.h.write('\n')
-            self.h.write('GType %s_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
-            self.h.write('\n')
-            self.h.write('GDBusInterfaceInfo *%s_interface_info (void);\n'%(i.name_lower))
-            self.h.write('guint %s_override_properties (GObjectClass *klass, guint 
property_id_begin);\n'%(i.name_lower))
-            self.h.write('\n')
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%s, g_object_unref)\n' % (i.camel_name))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
+            self.outfile.write('GType %s_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
+            self.outfile.write('\n')
+            self.outfile.write('GDBusInterfaceInfo *%s_interface_info (void);\n'%(i.name_lower))
+            self.outfile.write('guint %s_override_properties (GObjectClass *klass, guint 
property_id_begin);\n'%(i.name_lower))
+            self.outfile.write('\n')
 
             # Then method call completion functions
             if len(i.methods) > 0:
-                self.h.write('\n')
-                self.h.write('/* D-Bus method call completion functions: */\n')
+                self.outfile.write('\n')
+                self.outfile.write('/* D-Bus method call completion functions: */\n')
                 for m in i.methods:
                     unix_fd = False
                     if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
                         unix_fd = True
                     if m.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('void %s_complete_%s (\n'
-                                 '    %s *object,\n'
-                                 '    GDBusMethodInvocation *invocation'%(i.name_lower, m.name_lower, 
i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('void %s_complete_%s (\n'
+                                       '    %s *object,\n'
+                                       '    GDBusMethodInvocation *invocation'%(i.name_lower, m.name_lower, 
i.camel_name))
                     if unix_fd:
-                        self.h.write(',\n    GUnixFDList *fd_list')
+                        self.outfile.write(',\n    GUnixFDList *fd_list')
                     for a in m.out_args:
-                        self.h.write(',\n    %s%s'%(a.ctype_in, a.name))
-                    self.h.write(');\n')
-                    self.h.write('\n')
-                self.h.write('\n')
+                        self.outfile.write(',\n    %s%s'%(a.ctype_in, a.name))
+                    self.outfile.write(');\n')
+                    self.outfile.write('\n')
+                self.outfile.write('\n')
 
             # Then signal emission functions
             if len(i.signals) > 0:
-                self.h.write('\n')
-                self.h.write('/* D-Bus signal emissions functions: */\n')
+                self.outfile.write('\n')
+                self.outfile.write('/* D-Bus signal emissions functions: */\n')
                 for s in i.signals:
                     if s.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('void %s_emit_%s (\n'
-                                 '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('void %s_emit_%s (\n'
+                                       '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
                     for a in s.args:
-                        self.h.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
-                    self.h.write(');\n')
-                    self.h.write('\n')
-                self.h.write('\n')
+                        self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+                    self.outfile.write(');\n')
+                    self.outfile.write('\n')
+                self.outfile.write('\n')
 
             # Then method call declarations
             if len(i.methods) > 0:
-                self.h.write('\n')
-                self.h.write('/* D-Bus method calls: */\n')
+                self.outfile.write('\n')
+                self.outfile.write('/* D-Bus method calls: */\n')
                 for m in i.methods:
                     unix_fd = False
                     if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
                         unix_fd = True
                     # async begin
                     if m.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('void %s_call_%s (\n'
-                                 '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('void %s_call_%s (\n'
+                                       '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
                     for a in m.in_args:
-                        self.h.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+                        self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
                     if unix_fd:
-                        self.h.write(',\n    GUnixFDList *fd_list')
-                    self.h.write(',\n'
-                                 '    GCancellable *cancellable,\n'
-                                 '    GAsyncReadyCallback callback,\n'
-                                 '    gpointer user_data);\n')
-                    self.h.write('\n')
+                        self.outfile.write(',\n    GUnixFDList *fd_list')
+                    self.outfile.write(',\n'
+                                       '    GCancellable *cancellable,\n'
+                                       '    GAsyncReadyCallback callback,\n'
+                                       '    gpointer user_data);\n')
+                    self.outfile.write('\n')
                     # async finish
                     if m.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('gboolean %s_call_%s_finish (\n'
-                                 '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('gboolean %s_call_%s_finish (\n'
+                                       '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
                     for a in m.out_args:
-                        self.h.write(',\n    %sout_%s'%(a.ctype_out, a.name))
+                        self.outfile.write(',\n    %sout_%s'%(a.ctype_out, a.name))
                     if unix_fd:
-                        self.h.write(',\n    GUnixFDList **out_fd_list')
-                    self.h.write(',\n'
-                                 '    GAsyncResult *res,\n'
-                                 '    GError **error);\n')
-                    self.h.write('\n')
+                        self.outfile.write(',\n    GUnixFDList **out_fd_list')
+                    self.outfile.write(',\n'
+                                       '    GAsyncResult *res,\n'
+                                       '    GError **error);\n')
+                    self.outfile.write('\n')
                     # sync
                     if m.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('gboolean %s_call_%s_sync (\n'
-                                 '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('gboolean %s_call_%s_sync (\n'
+                                       '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
                     for a in m.in_args:
-                        self.h.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+                        self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
                     if unix_fd:
-                        self.h.write(',\n    GUnixFDList  *fd_list')
+                        self.outfile.write(',\n    GUnixFDList  *fd_list')
                     for a in m.out_args:
-                        self.h.write(',\n    %sout_%s'%(a.ctype_out, a.name))
+                        self.outfile.write(',\n    %sout_%s'%(a.ctype_out, a.name))
                     if unix_fd:
-                        self.h.write(',\n    GUnixFDList **out_fd_list')
-                    self.h.write(',\n'
-                                 '    GCancellable *cancellable,\n'
-                                 '    GError **error);\n')
-                    self.h.write('\n')
-                self.h.write('\n')
+                        self.outfile.write(',\n    GUnixFDList **out_fd_list')
+                    self.outfile.write(',\n'
+                                       '    GCancellable *cancellable,\n'
+                                       '    GError **error);\n')
+                    self.outfile.write('\n')
+                self.outfile.write('\n')
 
             # Then the property accessor declarations
             if len(i.properties) > 0:
-                self.h.write('\n')
-                self.h.write('/* D-Bus property accessors: */\n')
+                self.outfile.write('\n')
+                self.outfile.write('/* D-Bus property accessors: */\n')
                 for p in i.properties:
                     # getter
                     if p.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('%s%s_get_%s (%s *object);\n'%(p.arg.ctype_in, i.name_lower, p.name_lower, 
i.camel_name))
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('%s%s_get_%s (%s *object);\n'%(p.arg.ctype_in, i.name_lower, 
p.name_lower, i.camel_name))
                     if p.arg.free_func != None:
                         if p.deprecated:
-                            self.h.write('G_GNUC_DEPRECATED ')
-                        self.h.write('%s%s_dup_%s (%s *object);\n'%(p.arg.ctype_in_dup, i.name_lower, 
p.name_lower, i.camel_name))
+                            self.outfile.write('G_GNUC_DEPRECATED ')
+                        self.outfile.write('%s%s_dup_%s (%s *object);\n'%(p.arg.ctype_in_dup, i.name_lower, 
p.name_lower, i.camel_name))
                     # setter
                     if p.deprecated:
-                        self.h.write('G_GNUC_DEPRECATED ')
-                    self.h.write('void %s_set_%s (%s *object, %svalue);\n'%(i.name_lower, p.name_lower, 
i.camel_name, p.arg.ctype_in, ))
-                    self.h.write('\n')
+                        self.outfile.write('G_GNUC_DEPRECATED ')
+                    self.outfile.write('void %s_set_%s (%s *object, %svalue);\n'%(i.name_lower, 
p.name_lower, i.camel_name, p.arg.ctype_in, ))
+                    self.outfile.write('\n')
 
             # Then the proxy
-            self.h.write('\n')
-            self.h.write('/* ---- */\n')
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_%s_PROXY (%s_proxy_get_type ())\n'%(i.ns_upper, i.name_upper, 
i.name_lower))
-            self.h.write('#define %s%s_PROXY(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_%s_PROXY, 
%sProxy))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %s%s_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), %sTYPE_%s_PROXY, 
%sProxyClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %s%s_PROXY_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), %sTYPE_%s_PROXY, 
%sProxyClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %sIS_%s_PROXY(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_%s_PROXY))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
-            self.h.write('#define %sIS_%s_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_%s_PROXY))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
-            self.h.write('\n')
-            self.h.write('typedef struct _%sProxy %sProxy;\n'%(i.camel_name, i.camel_name))
-            self.h.write('typedef struct _%sProxyClass %sProxyClass;\n'%(i.camel_name, i.camel_name))
-            self.h.write('typedef struct _%sProxyPrivate %sProxyPrivate;\n'%(i.camel_name, i.camel_name))
-            self.h.write('\n')
-            self.h.write('struct _%sProxy\n'%(i.camel_name))
-            self.h.write('{\n')
-            self.h.write('  /*< private >*/\n')
-            self.h.write('  GDBusProxy parent_instance;\n')
-            self.h.write('  %sProxyPrivate *priv;\n'%(i.camel_name))
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('struct _%sProxyClass\n'%(i.camel_name))
-            self.h.write('{\n')
-            self.h.write('  GDBusProxyClass parent_class;\n')
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('GType %s_proxy_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
-            self.h.write('\n')
+            self.outfile.write('\n')
+            self.outfile.write('/* ---- */\n')
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_%s_PROXY (%s_proxy_get_type ())\n'%(i.ns_upper, i.name_upper, 
i.name_lower))
+            self.outfile.write('#define %s%s_PROXY(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_%s_PROXY, 
%sProxy))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %s%s_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), %sTYPE_%s_PROXY, 
%sProxyClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %s%s_PROXY_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_%s_PROXY, %sProxyClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %sIS_%s_PROXY(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_%s_PROXY))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+            self.outfile.write('#define %sIS_%s_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_%s_PROXY))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+            self.outfile.write('\n')
+            self.outfile.write('typedef struct _%sProxy %sProxy;\n'%(i.camel_name, i.camel_name))
+            self.outfile.write('typedef struct _%sProxyClass %sProxyClass;\n'%(i.camel_name, i.camel_name))
+            self.outfile.write('typedef struct _%sProxyPrivate %sProxyPrivate;\n'%(i.camel_name, 
i.camel_name))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sProxy\n'%(i.camel_name))
+            self.outfile.write('{\n')
+            self.outfile.write('  /*< private >*/\n')
+            self.outfile.write('  GDBusProxy parent_instance;\n')
+            self.outfile.write('  %sProxyPrivate *priv;\n'%(i.camel_name))
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sProxyClass\n'%(i.camel_name))
+            self.outfile.write('{\n')
+            self.outfile.write('  GDBusProxyClass parent_class;\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('GType %s_proxy_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
+            self.outfile.write('\n')
             if self.generate_autocleanup in ('objects', 'all'):
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sProxy, g_object_unref)\n' % (i.camel_name))
-                self.h.write('#endif\n')
-                self.h.write('\n')
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sProxy, g_object_unref)\n' % 
(i.camel_name))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('void %s_proxy_new (\n'
-                         '    GDBusConnection     *connection,\n'
-                         '    GDBusProxyFlags      flags,\n'
-                         '    const gchar         *name,\n'
-                         '    const gchar         *object_path,\n'
-                         '    GCancellable        *cancellable,\n'
-                         '    GAsyncReadyCallback  callback,\n'
-                         '    gpointer             user_data);\n'
-                         %(i.name_lower))
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('void %s_proxy_new (\n'
+                               '    GDBusConnection     *connection,\n'
+                               '    GDBusProxyFlags      flags,\n'
+                               '    const gchar         *name,\n'
+                               '    const gchar         *object_path,\n'
+                               '    GCancellable        *cancellable,\n'
+                               '    GAsyncReadyCallback  callback,\n'
+                               '    gpointer             user_data);\n'
+                               %(i.name_lower))
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('%s *%s_proxy_new_finish (\n'
-                         '    GAsyncResult        *res,\n'
-                         '    GError             **error);\n'
-                         %(i.camel_name, i.name_lower))
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('%s *%s_proxy_new_finish (\n'
+                               '    GAsyncResult        *res,\n'
+                               '    GError             **error);\n'
+                               %(i.camel_name, i.name_lower))
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('%s *%s_proxy_new_sync (\n'
-                         '    GDBusConnection     *connection,\n'
-                         '    GDBusProxyFlags      flags,\n'
-                         '    const gchar         *name,\n'
-                         '    const gchar         *object_path,\n'
-                         '    GCancellable        *cancellable,\n'
-                         '    GError             **error);\n'
-                         %(i.camel_name, i.name_lower))
-            self.h.write('\n')
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('%s *%s_proxy_new_sync (\n'
+                               '    GDBusConnection     *connection,\n'
+                               '    GDBusProxyFlags      flags,\n'
+                               '    const gchar         *name,\n'
+                               '    const gchar         *object_path,\n'
+                               '    GCancellable        *cancellable,\n'
+                               '    GError             **error);\n'
+                               %(i.camel_name, i.name_lower))
+            self.outfile.write('\n')
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('void %s_proxy_new_for_bus (\n'
-                         '    GBusType             bus_type,\n'
-                         '    GDBusProxyFlags      flags,\n'
-                         '    const gchar         *name,\n'
-                         '    const gchar         *object_path,\n'
-                         '    GCancellable        *cancellable,\n'
-                         '    GAsyncReadyCallback  callback,\n'
-                         '    gpointer             user_data);\n'
-                         %(i.name_lower))
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('void %s_proxy_new_for_bus (\n'
+                               '    GBusType             bus_type,\n'
+                               '    GDBusProxyFlags      flags,\n'
+                               '    const gchar         *name,\n'
+                               '    const gchar         *object_path,\n'
+                               '    GCancellable        *cancellable,\n'
+                               '    GAsyncReadyCallback  callback,\n'
+                               '    gpointer             user_data);\n'
+                               %(i.name_lower))
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('%s *%s_proxy_new_for_bus_finish (\n'
-                         '    GAsyncResult        *res,\n'
-                         '    GError             **error);\n'
-                         %(i.camel_name, i.name_lower))
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('%s *%s_proxy_new_for_bus_finish (\n'
+                               '    GAsyncResult        *res,\n'
+                               '    GError             **error);\n'
+                               %(i.camel_name, i.name_lower))
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('%s *%s_proxy_new_for_bus_sync (\n'
-                         '    GBusType             bus_type,\n'
-                         '    GDBusProxyFlags      flags,\n'
-                         '    const gchar         *name,\n'
-                         '    const gchar         *object_path,\n'
-                         '    GCancellable        *cancellable,\n'
-                         '    GError             **error);\n'
-                         %(i.camel_name, i.name_lower))
-            self.h.write('\n')
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('%s *%s_proxy_new_for_bus_sync (\n'
+                               '    GBusType             bus_type,\n'
+                               '    GDBusProxyFlags      flags,\n'
+                               '    const gchar         *name,\n'
+                               '    const gchar         *object_path,\n'
+                               '    GCancellable        *cancellable,\n'
+                               '    GError             **error);\n'
+                               %(i.camel_name, i.name_lower))
+            self.outfile.write('\n')
 
             # Then the skeleton
-            self.h.write('\n')
-            self.h.write('/* ---- */\n')
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_%s_SKELETON (%s_skeleton_get_type ())\n'%(i.ns_upper, i.name_upper, 
i.name_lower))
-            self.h.write('#define %s%s_SKELETON(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_%s_SKELETON, 
%sSkeleton))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %s%s_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), %sTYPE_%s_SKELETON, 
%sSkeletonClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %s%s_SKELETON_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_%s_SKELETON, %sSkeletonClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
-            self.h.write('#define %sIS_%s_SKELETON(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_%s_SKELETON))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
-            self.h.write('#define %sIS_%s_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_%s_SKELETON))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
-            self.h.write('\n')
-            self.h.write('typedef struct _%sSkeleton %sSkeleton;\n'%(i.camel_name, i.camel_name))
-            self.h.write('typedef struct _%sSkeletonClass %sSkeletonClass;\n'%(i.camel_name, i.camel_name))
-            self.h.write('typedef struct _%sSkeletonPrivate %sSkeletonPrivate;\n'%(i.camel_name, 
i.camel_name))
-            self.h.write('\n')
-            self.h.write('struct _%sSkeleton\n'%(i.camel_name))
-            self.h.write('{\n')
-            self.h.write('  /*< private >*/\n')
-            self.h.write('  GDBusInterfaceSkeleton parent_instance;\n')
-            self.h.write('  %sSkeletonPrivate *priv;\n'%(i.camel_name))
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('struct _%sSkeletonClass\n'%(i.camel_name))
-            self.h.write('{\n')
-            self.h.write('  GDBusInterfaceSkeletonClass parent_class;\n')
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('GType %s_skeleton_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
-            self.h.write('\n')
+            self.outfile.write('\n')
+            self.outfile.write('/* ---- */\n')
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_%s_SKELETON (%s_skeleton_get_type ())\n'%(i.ns_upper, 
i.name_upper, i.name_lower))
+            self.outfile.write('#define %s%s_SKELETON(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_%s_SKELETON, %sSkeleton))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %s%s_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_%s_SKELETON, %sSkeletonClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %s%s_SKELETON_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_%s_SKELETON, %sSkeletonClass))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper, i.camel_name))
+            self.outfile.write('#define %sIS_%s_SKELETON(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_%s_SKELETON))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+            self.outfile.write('#define %sIS_%s_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_%s_SKELETON))\n'%(i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+            self.outfile.write('\n')
+            self.outfile.write('typedef struct _%sSkeleton %sSkeleton;\n'%(i.camel_name, i.camel_name))
+            self.outfile.write('typedef struct _%sSkeletonClass %sSkeletonClass;\n'%(i.camel_name, 
i.camel_name))
+            self.outfile.write('typedef struct _%sSkeletonPrivate %sSkeletonPrivate;\n'%(i.camel_name, 
i.camel_name))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sSkeleton\n'%(i.camel_name))
+            self.outfile.write('{\n')
+            self.outfile.write('  /*< private >*/\n')
+            self.outfile.write('  GDBusInterfaceSkeleton parent_instance;\n')
+            self.outfile.write('  %sSkeletonPrivate *priv;\n'%(i.camel_name))
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sSkeletonClass\n'%(i.camel_name))
+            self.outfile.write('{\n')
+            self.outfile.write('  GDBusInterfaceSkeletonClass parent_class;\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('GType %s_skeleton_get_type (void) G_GNUC_CONST;\n'%(i.name_lower))
+            self.outfile.write('\n')
             if self.generate_autocleanup in ('objects', 'all'):
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sSkeleton, g_object_unref)\n' % (i.camel_name))
-                self.h.write('#endif\n')
-                self.h.write('\n')
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sSkeleton, g_object_unref)\n' % 
(i.camel_name))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
             if i.deprecated:
-                self.h.write('G_GNUC_DEPRECATED ')
-            self.h.write('%s *%s_skeleton_new (void);\n'%(i.camel_name, i.name_lower))
+                self.outfile.write('G_GNUC_DEPRECATED ')
+            self.outfile.write('%s *%s_skeleton_new (void);\n'%(i.camel_name, i.name_lower))
 
-            self.h.write('\n')
+            self.outfile.write('\n')
 
         # Finally, the Object, ObjectProxy, ObjectSkeleton and ObjectManagerClient
         if self.generate_objmanager:
-            self.h.write('\n')
-            self.h.write('/* ---- */\n')
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_OBJECT (%sobject_get_type ())\n'%(self.ns_upper, self.ns_lower))
-            self.h.write('#define %sOBJECT(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_OBJECT, 
%sObject))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sIS_OBJECT(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('#define %sOBJECT_GET_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), %sTYPE_OBJECT, 
%sObject))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('\n')
-            self.h.write('struct _%sObject;\n'%(self.namespace))
-            self.h.write('typedef struct _%sObject %sObject;\n'%(self.namespace, self.namespace))
-            self.h.write('typedef struct _%sObjectIface %sObjectIface;\n'%(self.namespace, self.namespace))
-            self.h.write('\n')
-            self.h.write('struct _%sObjectIface\n'%(self.namespace))
-            self.h.write('{\n'
-                         '  GTypeInterface parent_iface;\n'
-                         '};\n'
-                         '\n')
-            self.h.write('GType %sobject_get_type (void) G_GNUC_CONST;\n'
-                         '\n'
-                         %(self.ns_lower))
+            self.outfile.write('\n')
+            self.outfile.write('/* ---- */\n')
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_OBJECT (%sobject_get_type ())\n'%(self.ns_upper, 
self.ns_lower))
+            self.outfile.write('#define %sOBJECT(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_OBJECT, 
%sObject))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sIS_OBJECT(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('#define %sOBJECT_GET_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), 
%sTYPE_OBJECT, %sObject))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObject;\n'%(self.namespace))
+            self.outfile.write('typedef struct _%sObject %sObject;\n'%(self.namespace, self.namespace))
+            self.outfile.write('typedef struct _%sObjectIface %sObjectIface;\n'%(self.namespace, 
self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectIface\n'%(self.namespace))
+            self.outfile.write('{\n'
+                               '  GTypeInterface parent_iface;\n'
+                               '};\n'
+                               '\n')
+            self.outfile.write('GType %sobject_get_type (void) G_GNUC_CONST;\n'
+                               '\n'
+                               %(self.ns_lower))
             for i in self.ifaces:
                 if i.deprecated:
-                    self.h.write('G_GNUC_DEPRECATED ')
-                self.h.write ('%s *%sobject_get_%s (%sObject *object);\n'
-                              %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
+                    self.outfile.write('G_GNUC_DEPRECATED ')
+                self.outfile.write('%s *%sobject_get_%s (%sObject *object);\n'
+                                   %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
             for i in self.ifaces:
                 if i.deprecated:
-                    self.h.write('G_GNUC_DEPRECATED ')
-                self.h.write ('%s *%sobject_peek_%s (%sObject *object);\n'
-                              %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_OBJECT_PROXY (%sobject_proxy_get_type ())\n'%(self.ns_upper, 
self.ns_lower))
-            self.h.write('#define %sOBJECT_PROXY(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), %sTYPE_OBJECT_PROXY, 
%sObjectProxy))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_PROXY, %sObjectProxyClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_PROXY_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_OBJECT_PROXY, %sObjectProxyClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sIS_OBJECT_PROXY(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_PROXY))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('#define %sIS_OBJECT_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_PROXY))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('\n')
-            self.h.write('typedef struct _%sObjectProxy %sObjectProxy;\n'%(self.namespace, self.namespace))
-            self.h.write('typedef struct _%sObjectProxyClass %sObjectProxyClass;\n'%(self.namespace, 
self.namespace))
-            self.h.write('typedef struct _%sObjectProxyPrivate %sObjectProxyPrivate;\n'%(self.namespace, 
self.namespace))
-            self.h.write('\n')
-            self.h.write('struct _%sObjectProxy\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  /*< private >*/\n')
-            self.h.write('  GDBusObjectProxy parent_instance;\n')
-            self.h.write('  %sObjectProxyPrivate *priv;\n'%(self.namespace))
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('struct _%sObjectProxyClass\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  GDBusObjectProxyClass parent_class;\n')
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('GType %sobject_proxy_get_type (void) G_GNUC_CONST;\n'%(self.ns_lower))
-            self.h.write('\n')
+                    self.outfile.write('G_GNUC_DEPRECATED ')
+                self.outfile.write('%s *%sobject_peek_%s (%sObject *object);\n'
+                                   %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_OBJECT_PROXY (%sobject_proxy_get_type ())\n'%(self.ns_upper, 
self.ns_lower))
+            self.outfile.write('#define %sOBJECT_PROXY(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_OBJECT_PROXY, %sObjectProxy))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_PROXY, %sObjectProxyClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_PROXY_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_OBJECT_PROXY, %sObjectProxyClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sIS_OBJECT_PROXY(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_PROXY))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('#define %sIS_OBJECT_PROXY_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_PROXY))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('\n')
+            self.outfile.write('typedef struct _%sObjectProxy %sObjectProxy;\n'%(self.namespace, 
self.namespace))
+            self.outfile.write('typedef struct _%sObjectProxyClass %sObjectProxyClass;\n'%(self.namespace, 
self.namespace))
+            self.outfile.write('typedef struct _%sObjectProxyPrivate 
%sObjectProxyPrivate;\n'%(self.namespace, self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectProxy\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  /*< private >*/\n')
+            self.outfile.write('  GDBusObjectProxy parent_instance;\n')
+            self.outfile.write('  %sObjectProxyPrivate *priv;\n'%(self.namespace))
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectProxyClass\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  GDBusObjectProxyClass parent_class;\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('GType %sobject_proxy_get_type (void) G_GNUC_CONST;\n'%(self.ns_lower))
+            self.outfile.write('\n')
             if self.generate_autocleanup in ('objects', 'all'):
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectProxy, g_object_unref)\n' % 
(self.namespace))
-                self.h.write('#endif\n')
-                self.h.write('\n')
-            self.h.write('%sObjectProxy *%sobject_proxy_new (GDBusConnection *connection, const gchar 
*object_path);\n'%(self.namespace, self.ns_lower))
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_OBJECT_SKELETON (%sobject_skeleton_get_type ())\n'%(self.ns_upper, 
self.ns_lower))
-            self.h.write('#define %sOBJECT_SKELETON(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeleton))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeletonClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_SKELETON_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeletonClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sIS_OBJECT_SKELETON(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_SKELETON))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('#define %sIS_OBJECT_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_SKELETON))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('\n')
-            self.h.write('typedef struct _%sObjectSkeleton %sObjectSkeleton;\n'%(self.namespace, 
self.namespace))
-            self.h.write('typedef struct _%sObjectSkeletonClass %sObjectSkeletonClass;\n'%(self.namespace, 
self.namespace))
-            self.h.write('typedef struct _%sObjectSkeletonPrivate 
%sObjectSkeletonPrivate;\n'%(self.namespace, self.namespace))
-            self.h.write('\n')
-            self.h.write('struct _%sObjectSkeleton\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  /*< private >*/\n')
-            self.h.write('  GDBusObjectSkeleton parent_instance;\n')
-            self.h.write('  %sObjectSkeletonPrivate *priv;\n'%(self.namespace))
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('struct _%sObjectSkeletonClass\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  GDBusObjectSkeletonClass parent_class;\n')
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('GType %sobject_skeleton_get_type (void) G_GNUC_CONST;\n'%(self.ns_lower))
-            self.h.write('\n')
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectProxy, g_object_unref)\n' % 
(self.namespace))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
+            self.outfile.write('%sObjectProxy *%sobject_proxy_new (GDBusConnection *connection, const gchar 
*object_path);\n'%(self.namespace, self.ns_lower))
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_OBJECT_SKELETON (%sobject_skeleton_get_type 
())\n'%(self.ns_upper, self.ns_lower))
+            self.outfile.write('#define %sOBJECT_SKELETON(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeleton))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeletonClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_SKELETON_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_OBJECT_SKELETON, %sObjectSkeletonClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sIS_OBJECT_SKELETON(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_SKELETON))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('#define %sIS_OBJECT_SKELETON_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_SKELETON))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('\n')
+            self.outfile.write('typedef struct _%sObjectSkeleton %sObjectSkeleton;\n'%(self.namespace, 
self.namespace))
+            self.outfile.write('typedef struct _%sObjectSkeletonClass 
%sObjectSkeletonClass;\n'%(self.namespace, self.namespace))
+            self.outfile.write('typedef struct _%sObjectSkeletonPrivate 
%sObjectSkeletonPrivate;\n'%(self.namespace, self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectSkeleton\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  /*< private >*/\n')
+            self.outfile.write('  GDBusObjectSkeleton parent_instance;\n')
+            self.outfile.write('  %sObjectSkeletonPrivate *priv;\n'%(self.namespace))
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectSkeletonClass\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  GDBusObjectSkeletonClass parent_class;\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('GType %sobject_skeleton_get_type (void) G_GNUC_CONST;\n'%(self.ns_lower))
+            self.outfile.write('\n')
             if self.generate_autocleanup in ('objects', 'all'):
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectSkeleton, g_object_unref)\n' % 
(self.namespace))
-                self.h.write('#endif\n')
-                self.h.write('\n')
-            self.h.write('%sObjectSkeleton *%sobject_skeleton_new (const gchar *object_path);\n'
-                         %(self.namespace, self.ns_lower))
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectSkeleton, g_object_unref)\n' % 
(self.namespace))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
+            self.outfile.write('%sObjectSkeleton *%sobject_skeleton_new (const gchar *object_path);\n'
+                               %(self.namespace, self.ns_lower))
             for i in self.ifaces:
                 if i.deprecated:
-                    self.h.write('G_GNUC_DEPRECATED ')
-                self.h.write ('void %sobject_skeleton_set_%s (%sObjectSkeleton *object, %s *interface_);\n'
-                              %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name))
-            self.h.write('\n')
-
-            self.h.write('/* ---- */\n')
-            self.h.write('\n')
-            self.h.write('#define %sTYPE_OBJECT_MANAGER_CLIENT (%sobject_manager_client_get_type 
())\n'%(self.ns_upper, self.ns_lower))
-            self.h.write('#define %sOBJECT_MANAGER_CLIENT(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClient))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_MANAGER_CLIENT_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClientClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sOBJECT_MANAGER_CLIENT_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
%sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClientClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
-            self.h.write('#define %sIS_OBJECT_MANAGER_CLIENT(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_MANAGER_CLIENT))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('#define %sIS_OBJECT_MANAGER_CLIENT_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_MANAGER_CLIENT))\n'%(self.ns_upper, self.ns_upper))
-            self.h.write('\n')
-            self.h.write('typedef struct _%sObjectManagerClient %sObjectManagerClient;\n'%(self.namespace, 
self.namespace))
-            self.h.write('typedef struct _%sObjectManagerClientClass 
%sObjectManagerClientClass;\n'%(self.namespace, self.namespace))
-            self.h.write('typedef struct _%sObjectManagerClientPrivate 
%sObjectManagerClientPrivate;\n'%(self.namespace, self.namespace))
-            self.h.write('\n')
-            self.h.write('struct _%sObjectManagerClient\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  /*< private >*/\n')
-            self.h.write('  GDBusObjectManagerClient parent_instance;\n')
-            self.h.write('  %sObjectManagerClientPrivate *priv;\n'%(self.namespace))
-            self.h.write('};\n')
-            self.h.write('\n')
-            self.h.write('struct _%sObjectManagerClientClass\n'%(self.namespace))
-            self.h.write('{\n')
-            self.h.write('  GDBusObjectManagerClientClass parent_class;\n')
-            self.h.write('};\n')
-            self.h.write('\n')
+                    self.outfile.write('G_GNUC_DEPRECATED ')
+                self.outfile.write('void %sobject_skeleton_set_%s (%sObjectSkeleton *object, %s 
*interface_);\n'
+                                   %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name))
+            self.outfile.write('\n')
+
+            self.outfile.write('/* ---- */\n')
+            self.outfile.write('\n')
+            self.outfile.write('#define %sTYPE_OBJECT_MANAGER_CLIENT (%sobject_manager_client_get_type 
())\n'%(self.ns_upper, self.ns_lower))
+            self.outfile.write('#define %sOBJECT_MANAGER_CLIENT(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), 
%sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClient))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_MANAGER_CLIENT_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), 
%sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClientClass))\n'%(self.ns_upper, self.ns_upper, self.namespace))
+            self.outfile.write('#define %sOBJECT_MANAGER_CLIENT_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS 
((o), %sTYPE_OBJECT_MANAGER_CLIENT, %sObjectManagerClientClass))\n'%(self.ns_upper, self.ns_upper, 
self.namespace))
+            self.outfile.write('#define %sIS_OBJECT_MANAGER_CLIENT(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
%sTYPE_OBJECT_MANAGER_CLIENT))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('#define %sIS_OBJECT_MANAGER_CLIENT_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), 
%sTYPE_OBJECT_MANAGER_CLIENT))\n'%(self.ns_upper, self.ns_upper))
+            self.outfile.write('\n')
+            self.outfile.write('typedef struct _%sObjectManagerClient 
%sObjectManagerClient;\n'%(self.namespace, self.namespace))
+            self.outfile.write('typedef struct _%sObjectManagerClientClass 
%sObjectManagerClientClass;\n'%(self.namespace, self.namespace))
+            self.outfile.write('typedef struct _%sObjectManagerClientPrivate 
%sObjectManagerClientPrivate;\n'%(self.namespace, self.namespace))
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectManagerClient\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  /*< private >*/\n')
+            self.outfile.write('  GDBusObjectManagerClient parent_instance;\n')
+            self.outfile.write('  %sObjectManagerClientPrivate *priv;\n'%(self.namespace))
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
+            self.outfile.write('struct _%sObjectManagerClientClass\n'%(self.namespace))
+            self.outfile.write('{\n')
+            self.outfile.write('  GDBusObjectManagerClientClass parent_class;\n')
+            self.outfile.write('};\n')
+            self.outfile.write('\n')
             if self.generate_autocleanup in ('objects', 'all'):
-                self.h.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
-                self.h.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectManagerClient, g_object_unref)\n' % 
(self.namespace))
-                self.h.write('#endif\n')
-                self.h.write('\n')
-            self.h.write('GType %sobject_manager_client_get_type (void) G_GNUC_CONST;\n'%(self.ns_lower))
-            self.h.write('\n')
-            self.h.write('GType %sobject_manager_client_get_proxy_type (GDBusObjectManagerClient *manager, 
const gchar *object_path, const gchar *interface_name, gpointer user_data);\n'%(self.ns_lower))
-            self.h.write('\n')
-            self.h.write('void %sobject_manager_client_new (\n'
-                         '    GDBusConnection        *connection,\n'
-                         '    GDBusObjectManagerClientFlags  flags,\n'
-                         '    const gchar            *name,\n'
-                         '    const gchar            *object_path,\n'
-                         '    GCancellable           *cancellable,\n'
-                         '    GAsyncReadyCallback     callback,\n'
-                         '    gpointer                user_data);\n'
-                         %(self.ns_lower))
-            self.h.write('GDBusObjectManager *%sobject_manager_client_new_finish (\n'
-                         '    GAsyncResult        *res,\n'
-                         '    GError             **error);\n'
-                         %(self.ns_lower))
-            self.h.write('GDBusObjectManager *%sobject_manager_client_new_sync (\n'
-                         '    GDBusConnection        *connection,\n'
-                         '    GDBusObjectManagerClientFlags  flags,\n'
-                         '    const gchar            *name,\n'
-                         '    const gchar            *object_path,\n'
-                         '    GCancellable           *cancellable,\n'
-                         '    GError                **error);\n'
-                         %(self.ns_lower))
-            self.h.write('\n')
-            self.h.write('void %sobject_manager_client_new_for_bus (\n'
-                         '    GBusType                bus_type,\n'
-                         '    GDBusObjectManagerClientFlags  flags,\n'
-                         '    const gchar            *name,\n'
-                         '    const gchar            *object_path,\n'
-                         '    GCancellable           *cancellable,\n'
-                         '    GAsyncReadyCallback     callback,\n'
-                         '    gpointer                user_data);\n'
-                         %(self.ns_lower))
-            self.h.write('GDBusObjectManager *%sobject_manager_client_new_for_bus_finish (\n'
-                         '    GAsyncResult        *res,\n'
-                         '    GError             **error);\n'
-                         %(self.ns_lower))
-            self.h.write('GDBusObjectManager *%sobject_manager_client_new_for_bus_sync (\n'
-                         '    GBusType                bus_type,\n'
-                         '    GDBusObjectManagerClientFlags  flags,\n'
-                         '    const gchar            *name,\n'
-                         '    const gchar            *object_path,\n'
-                         '    GCancellable           *cancellable,\n'
-                         '    GError                **error);\n'
-                         %(self.ns_lower))
-            self.h.write('\n')
+                self.outfile.write('#if GLIB_CHECK_VERSION(2, 44, 0)\n')
+                self.outfile.write('G_DEFINE_AUTOPTR_CLEANUP_FUNC (%sObjectManagerClient, g_object_unref)\n' 
% (self.namespace))
+                self.outfile.write('#endif\n')
+                self.outfile.write('\n')
+            self.outfile.write('GType %sobject_manager_client_get_type (void) 
G_GNUC_CONST;\n'%(self.ns_lower))
+            self.outfile.write('\n')
+            self.outfile.write('GType %sobject_manager_client_get_proxy_type (GDBusObjectManagerClient 
*manager, const gchar *object_path, const gchar *interface_name, gpointer user_data);\n'%(self.ns_lower))
+            self.outfile.write('\n')
+            self.outfile.write('void %sobject_manager_client_new (\n'
+                               '    GDBusConnection        *connection,\n'
+                               '    GDBusObjectManagerClientFlags  flags,\n'
+                               '    const gchar            *name,\n'
+                               '    const gchar            *object_path,\n'
+                               '    GCancellable           *cancellable,\n'
+                               '    GAsyncReadyCallback     callback,\n'
+                               '    gpointer                user_data);\n'
+                               %(self.ns_lower))
+            self.outfile.write('GDBusObjectManager *%sobject_manager_client_new_finish (\n'
+                               '    GAsyncResult        *res,\n'
+                               '    GError             **error);\n'
+                               %(self.ns_lower))
+            self.outfile.write('GDBusObjectManager *%sobject_manager_client_new_sync (\n'
+                               '    GDBusConnection        *connection,\n'
+                               '    GDBusObjectManagerClientFlags  flags,\n'
+                               '    const gchar            *name,\n'
+                               '    const gchar            *object_path,\n'
+                               '    GCancellable           *cancellable,\n'
+                               '    GError                **error);\n'
+                               %(self.ns_lower))
+            self.outfile.write('\n')
+            self.outfile.write('void %sobject_manager_client_new_for_bus (\n'
+                               '    GBusType                bus_type,\n'
+                               '    GDBusObjectManagerClientFlags  flags,\n'
+                               '    const gchar            *name,\n'
+                               '    const gchar            *object_path,\n'
+                               '    GCancellable           *cancellable,\n'
+                               '    GAsyncReadyCallback     callback,\n'
+                               '    gpointer                user_data);\n'
+                               %(self.ns_lower))
+            self.outfile.write('GDBusObjectManager *%sobject_manager_client_new_for_bus_finish (\n'
+                               '    GAsyncResult        *res,\n'
+                               '    GError             **error);\n'
+                               %(self.ns_lower))
+            self.outfile.write('GDBusObjectManager *%sobject_manager_client_new_for_bus_sync (\n'
+                               '    GBusType                bus_type,\n'
+                               '    GDBusObjectManagerClientFlags  flags,\n'
+                               '    const gchar            *name,\n'
+                               '    const gchar            *object_path,\n'
+                               '    GCancellable           *cancellable,\n'
+                               '    GError                **error);\n'
+                               %(self.ns_lower))
+            self.outfile.write('\n')
 
     # ----------------------------------------------------------------------------------------------------
 
     def generate_header_postamble(self):
-        self.h.write('\n')
-        self.h.write('G_END_DECLS\n')
+        self.outfile.write('\n')
+        self.outfile.write('G_END_DECLS\n')
 
         if not self.use_pragma:
-            self.h.write('\n')
-            self.h.write('#endif /* __{!s}__ */\n'.format(self.header_guard))
+            self.outfile.write('\n')
+            self.outfile.write('#endif /* __{!s}__ */\n'.format(self.header_guard))
 
     # ----------------------------------------------------------------------------------------------------
 
-    def generate_body_preamble(self):
-        self.c.write(LICENSE_STR.format(config.VERSION))
-        self.c.write('\n')
-        self.c.write('#ifdef HAVE_CONFIG_H\n'
-                     '#  include "config.h"\n'
-                     '#endif\n'
-                     '\n'
-                     '#include "%s"\n'
-                     '\n'
-                     '#include <string.h>\n'
-                     %(self.header_name))
-
-        self.c.write('#ifdef G_OS_UNIX\n'
-                     '#  include <gio/gunixfdlist.h>\n'
-                     '#endif\n'
-                     '\n')
-
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  GDBusArgInfo parent_struct;\n'
-                     '  gboolean use_gvariant;\n'
-                     '} _ExtendedGDBusArgInfo;\n'
-                     '\n')
-
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  GDBusMethodInfo parent_struct;\n'
-                     '  const gchar *signal_name;\n'
-                     '  gboolean pass_fdlist;\n'
-                     '} _ExtendedGDBusMethodInfo;\n'
-                     '\n')
-
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  GDBusSignalInfo parent_struct;\n'
-                     '  const gchar *signal_name;\n'
-                     '} _ExtendedGDBusSignalInfo;\n'
-                     '\n')
-
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  GDBusPropertyInfo parent_struct;\n'
-                     '  const gchar *hyphen_name;\n'
-                     '  gboolean use_gvariant;\n'
-                     '} _ExtendedGDBusPropertyInfo;\n'
-                     '\n')
+    def generate(self):
+        self.generate_header_preamble()
+        self.declare_types()
+        self.generate_header_postamble()
 
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  GDBusInterfaceInfo parent_struct;\n'
-                     '  const gchar *hyphen_name;\n'
-                     '} _ExtendedGDBusInterfaceInfo;\n'
-                     '\n')
+# ----------------------------------------------------------------------------------------------------
 
-        self.c.write('typedef struct\n'
-                     '{\n'
-                     '  const _ExtendedGDBusPropertyInfo *info;\n'
-                     '  guint prop_id;\n'
-                     '  GValue orig_value; /* the value before the change */\n'
-                     '} ChangedProperty;\n'
-                     '\n'
-                     'static void\n'
-                     '_changed_property_free (ChangedProperty *data)\n'
-                     '{\n'
-                     '  g_value_unset (&data->orig_value);\n'
-                     '  g_free (data);\n'
-                     '}\n'
-                     '\n')
+class CodeGenerator:
+    def __init__(self, ifaces, namespace, generate_objmanager, header_name,
+                 docbook_gen, outfile):
+        self.ifaces = ifaces
+        self.namespace, self.ns_upper, self.ns_lower = generate_namespace(namespace)
+        self.generate_objmanager = generate_objmanager
+        self.header_name = header_name
+        self.docbook_gen = docbook_gen
+        self.outfile = outfile
 
-        self.c.write('static gboolean\n'
-                     '_g_strv_equal0 (gchar **a, gchar **b)\n'
-                     '{\n'
-                     '  gboolean ret = FALSE;\n'
-                     '  guint n;\n'
-                     '  if (a == NULL && b == NULL)\n'
-                     '    {\n'
-                     '      ret = TRUE;\n'
-                     '      goto out;\n'
-                     '    }\n'
-                     '  if (a == NULL || b == NULL)\n'
-                     '    goto out;\n'
-                     '  if (g_strv_length (a) != g_strv_length (b))\n'
-                     '    goto out;\n'
-                     '  for (n = 0; a[n] != NULL; n++)\n'
-                     '    if (g_strcmp0 (a[n], b[n]) != 0)\n'
-                     '      goto out;\n'
-                     '  ret = TRUE;\n'
-                     'out:\n'
-                     '  return ret;\n'
-                     '}\n'
-                     '\n')
+    # ----------------------------------------------------------------------------------------------------
 
-        self.c.write('static gboolean\n'
-                     '_g_variant_equal0 (GVariant *a, GVariant *b)\n'
-                     '{\n'
-                     '  gboolean ret = FALSE;\n'
-                     '  if (a == NULL && b == NULL)\n'
-                     '    {\n'
-                     '      ret = TRUE;\n'
-                     '      goto out;\n'
-                     '    }\n'
-                     '  if (a == NULL || b == NULL)\n'
-                     '    goto out;\n'
-                     '  ret = g_variant_equal (a, b);\n'
-                     'out:\n'
-                     '  return ret;\n'
-                     '}\n'
-                     '\n')
+    def generate_body_preamble(self):
+        self.outfile.write(LICENSE_STR.format(config.VERSION))
+        self.outfile.write('\n')
+        self.outfile.write('#ifdef HAVE_CONFIG_H\n'
+                           '#  include "config.h"\n'
+                           '#endif\n'
+                           '\n'
+                           '#include "%s"\n'
+                           '\n'
+                           '#include <string.h>\n'
+                           %(self.header_name))
+
+        self.outfile.write('#ifdef G_OS_UNIX\n'
+                           '#  include <gio/gunixfdlist.h>\n'
+                           '#endif\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  GDBusArgInfo parent_struct;\n'
+                           '  gboolean use_gvariant;\n'
+                           '} _ExtendedGDBusArgInfo;\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  GDBusMethodInfo parent_struct;\n'
+                           '  const gchar *signal_name;\n'
+                           '  gboolean pass_fdlist;\n'
+                           '} _ExtendedGDBusMethodInfo;\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  GDBusSignalInfo parent_struct;\n'
+                           '  const gchar *signal_name;\n'
+                           '} _ExtendedGDBusSignalInfo;\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  GDBusPropertyInfo parent_struct;\n'
+                           '  const gchar *hyphen_name;\n'
+                           '  gboolean use_gvariant;\n'
+                           '} _ExtendedGDBusPropertyInfo;\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  GDBusInterfaceInfo parent_struct;\n'
+                           '  const gchar *hyphen_name;\n'
+                           '} _ExtendedGDBusInterfaceInfo;\n'
+                           '\n')
+
+        self.outfile.write('typedef struct\n'
+                           '{\n'
+                           '  const _ExtendedGDBusPropertyInfo *info;\n'
+                           '  guint prop_id;\n'
+                           '  GValue orig_value; /* the value before the change */\n'
+                           '} ChangedProperty;\n'
+                           '\n'
+                           'static void\n'
+                           '_changed_property_free (ChangedProperty *data)\n'
+                           '{\n'
+                           '  g_value_unset (&data->orig_value);\n'
+                           '  g_free (data);\n'
+                           '}\n'
+                           '\n')
+
+        self.outfile.write('static gboolean\n'
+                           '_g_strv_equal0 (gchar **a, gchar **b)\n'
+                           '{\n'
+                           '  gboolean ret = FALSE;\n'
+                           '  guint n;\n'
+                           '  if (a == NULL && b == NULL)\n'
+                           '    {\n'
+                           '      ret = TRUE;\n'
+                           '      goto out;\n'
+                           '    }\n'
+                           '  if (a == NULL || b == NULL)\n'
+                           '    goto out;\n'
+                           '  if (g_strv_length (a) != g_strv_length (b))\n'
+                           '    goto out;\n'
+                           '  for (n = 0; a[n] != NULL; n++)\n'
+                           '    if (g_strcmp0 (a[n], b[n]) != 0)\n'
+                           '      goto out;\n'
+                           '  ret = TRUE;\n'
+                           'out:\n'
+                           '  return ret;\n'
+                           '}\n'
+                           '\n')
+
+        self.outfile.write('static gboolean\n'
+                           '_g_variant_equal0 (GVariant *a, GVariant *b)\n'
+                           '{\n'
+                           '  gboolean ret = FALSE;\n'
+                           '  if (a == NULL && b == NULL)\n'
+                           '    {\n'
+                           '      ret = TRUE;\n'
+                           '      goto out;\n'
+                           '    }\n'
+                           '  if (a == NULL || b == NULL)\n'
+                           '    goto out;\n'
+                           '  ret = g_variant_equal (a, b);\n'
+                           'out:\n'
+                           '  return ret;\n'
+                           '}\n'
+                           '\n')
 
         # simplified - only supports the types we use
-        self.c.write('G_GNUC_UNUSED static gboolean\n'
-                     '_g_value_equal (const GValue *a, const GValue *b)\n'
-                     '{\n'
-                     '  gboolean ret = FALSE;\n'
-                     '  g_assert (G_VALUE_TYPE (a) == G_VALUE_TYPE (b));\n'
-                     '  switch (G_VALUE_TYPE (a))\n'
-                     '    {\n'
-                     '      case G_TYPE_BOOLEAN:\n'
-                     '        ret = (g_value_get_boolean (a) == g_value_get_boolean (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_UCHAR:\n'
-                     '        ret = (g_value_get_uchar (a) == g_value_get_uchar (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_INT:\n'
-                     '        ret = (g_value_get_int (a) == g_value_get_int (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_UINT:\n'
-                     '        ret = (g_value_get_uint (a) == g_value_get_uint (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_INT64:\n'
-                     '        ret = (g_value_get_int64 (a) == g_value_get_int64 (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_UINT64:\n'
-                     '        ret = (g_value_get_uint64 (a) == g_value_get_uint64 (b));\n'
-                     '        break;\n'
-                     '      case G_TYPE_DOUBLE:\n'
-                     '        {\n'
-                     '          /* Avoid -Wfloat-equal warnings by doing a direct bit compare */\n'
-                     '          gdouble da = g_value_get_double (a);\n'
-                     '          gdouble db = g_value_get_double (b);\n'
-                     '          ret = memcmp (&da, &db, sizeof (gdouble)) == 0;\n'
-                     '        }\n'
-                     '        break;\n'
-                     '      case G_TYPE_STRING:\n'
-                     '        ret = (g_strcmp0 (g_value_get_string (a), g_value_get_string (b)) == 0);\n'
-                     '        break;\n'
-                     '      case G_TYPE_VARIANT:\n'
-                     '        ret = _g_variant_equal0 (g_value_get_variant (a), g_value_get_variant (b));\n'
-                     '        break;\n'
-                     '      default:\n'
-                     '        if (G_VALUE_TYPE (a) == G_TYPE_STRV)\n'
-                     '          ret = _g_strv_equal0 (g_value_get_boxed (a), g_value_get_boxed (b));\n'
-                     '        else\n'
-                     '          g_critical ("_g_value_equal() does not handle type %s", g_type_name 
(G_VALUE_TYPE (a)));\n'
-                     '        break;\n'
-                     '    }\n'
-                     '  return ret;\n'
-                     '}\n'
-                     '\n')
+        self.outfile.write('G_GNUC_UNUSED static gboolean\n'
+                           '_g_value_equal (const GValue *a, const GValue *b)\n'
+                           '{\n'
+                           '  gboolean ret = FALSE;\n'
+                           '  g_assert (G_VALUE_TYPE (a) == G_VALUE_TYPE (b));\n'
+                           '  switch (G_VALUE_TYPE (a))\n'
+                           '    {\n'
+                           '      case G_TYPE_BOOLEAN:\n'
+                           '        ret = (g_value_get_boolean (a) == g_value_get_boolean (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_UCHAR:\n'
+                           '        ret = (g_value_get_uchar (a) == g_value_get_uchar (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_INT:\n'
+                           '        ret = (g_value_get_int (a) == g_value_get_int (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_UINT:\n'
+                           '        ret = (g_value_get_uint (a) == g_value_get_uint (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_INT64:\n'
+                           '        ret = (g_value_get_int64 (a) == g_value_get_int64 (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_UINT64:\n'
+                           '        ret = (g_value_get_uint64 (a) == g_value_get_uint64 (b));\n'
+                           '        break;\n'
+                           '      case G_TYPE_DOUBLE:\n'
+                           '        {\n'
+                           '          /* Avoid -Wfloat-equal warnings by doing a direct bit compare */\n'
+                           '          gdouble da = g_value_get_double (a);\n'
+                           '          gdouble db = g_value_get_double (b);\n'
+                           '          ret = memcmp (&da, &db, sizeof (gdouble)) == 0;\n'
+                           '        }\n'
+                           '        break;\n'
+                           '      case G_TYPE_STRING:\n'
+                           '        ret = (g_strcmp0 (g_value_get_string (a), g_value_get_string (b)) == 
0);\n'
+                           '        break;\n'
+                           '      case G_TYPE_VARIANT:\n'
+                           '        ret = _g_variant_equal0 (g_value_get_variant (a), g_value_get_variant 
(b));\n'
+                           '        break;\n'
+                           '      default:\n'
+                           '        if (G_VALUE_TYPE (a) == G_TYPE_STRV)\n'
+                           '          ret = _g_strv_equal0 (g_value_get_boxed (a), g_value_get_boxed (b));\n'
+                           '        else\n'
+                           '          g_critical ("_g_value_equal() does not handle type %s", g_type_name 
(G_VALUE_TYPE (a)));\n'
+                           '        break;\n'
+                           '    }\n'
+                           '  return ret;\n'
+                           '}\n'
+                           '\n')
 
     def generate_annotations(self, prefix, annotations):
         if annotations == None:
@@ -775,67 +793,67 @@ class CodeGenerator:
             if a.key.startswith('org.gtk.GDBus'):
                 continue
 
-            self.c.write('static const GDBusAnnotationInfo %s_%d =\n'
-                         '{\n'
-                         '  -1,\n'
-                         '  (gchar *) "%s",\n'
-                         '  (gchar *) "%s",\n'%(prefix, n, a.key, a.value))
+            self.outfile.write('static const GDBusAnnotationInfo %s_%d =\n'
+                               '{\n'
+                               '  -1,\n'
+                               '  (gchar *) "%s",\n'
+                               '  (gchar *) "%s",\n'%(prefix, n, a.key, a.value))
             if len(a.annotations) == 0:
-                self.c.write('  NULL\n')
+                self.outfile.write('  NULL\n')
             else:
-                self.c.write('  (GDBusAnnotationInfo **) &%s_%d_pointers\n'%(prefix, n))
-            self.c.write('};\n'
-                         '\n')
+                self.outfile.write('  (GDBusAnnotationInfo **) &%s_%d_pointers\n'%(prefix, n))
+            self.outfile.write('};\n'
+                               '\n')
             n += 1
 
         if n > 0:
-            self.c.write('static const GDBusAnnotationInfo * const %s_pointers[] =\n'
-                             '{\n'%(prefix))
+            self.outfile.write('static const GDBusAnnotationInfo * const %s_pointers[] =\n'
+                               '{\n'%(prefix))
             m = 0;
             for a in annotations:
                 if a.key.startswith('org.gtk.GDBus'):
                     continue
-                self.c.write('  &%s_%d,\n'%(prefix, m))
+                self.outfile.write('  &%s_%d,\n'%(prefix, m))
                 m += 1
-            self.c.write('  NULL\n'
-                         '};\n'
-                         '\n')
+            self.outfile.write('  NULL\n'
+                               '};\n'
+                               '\n')
         return n
 
     def generate_args(self, prefix, args):
         for a in args:
             num_anno = self.generate_annotations('%s_arg_%s_annotation_info'%(prefix, a.name), a.annotations)
 
-            self.c.write('static const _ExtendedGDBusArgInfo %s_%s =\n'
-                         '{\n'
-                         '  {\n'
-                         '    -1,\n'
-                         '    (gchar *) "%s",\n'
-                         '    (gchar *) "%s",\n'%(prefix, a.name, a.name, a.signature))
+            self.outfile.write('static const _ExtendedGDBusArgInfo %s_%s =\n'
+                               '{\n'
+                               '  {\n'
+                               '    -1,\n'
+                               '    (gchar *) "%s",\n'
+                               '    (gchar *) "%s",\n'%(prefix, a.name, a.name, a.signature))
             if num_anno == 0:
-                self.c.write('    NULL\n')
+                self.outfile.write('    NULL\n')
             else:
-                self.c.write('    (GDBusAnnotationInfo **) &%s_arg_%s_annotation_info_pointers\n'%(prefix, 
a.name))
-            self.c.write('  },\n')
+                self.outfile.write('    (GDBusAnnotationInfo **) 
&%s_arg_%s_annotation_info_pointers\n'%(prefix, a.name))
+            self.outfile.write('  },\n')
             if not utils.lookup_annotation(a.annotations, 'org.gtk.GDBus.C.ForceGVariant'):
-                self.c.write('  FALSE\n')
+                self.outfile.write('  FALSE\n')
             else:
-                self.c.write('  TRUE\n')
-            self.c.write('};\n'
-                         '\n')
+                self.outfile.write('  TRUE\n')
+            self.outfile.write('};\n'
+                               '\n')
 
         if len(args) > 0:
-            self.c.write('static const _ExtendedGDBusArgInfo * const %s_pointers[] =\n'
+            self.outfile.write('static const _ExtendedGDBusArgInfo * const %s_pointers[] =\n'
                              '{\n'%(prefix))
             for a in args:
-                self.c.write('  &%s_%s,\n'%(prefix, a.name))
-            self.c.write('  NULL\n'
-                         '};\n'
-                         '\n')
+                self.outfile.write('  &%s_%s,\n'%(prefix, a.name))
+            self.outfile.write('  NULL\n'
+                               '};\n'
+                               '\n')
 
     def generate_introspection_for_interface(self, i):
-            self.c.write('/* ---- Introspection data for %s ---- */\n'
-                         '\n'%(i.name))
+            self.outfile.write('/* ---- Introspection data for %s ---- */\n'
+                               '\n'%(i.name))
 
             if len(i.methods) > 0:
                 for m in i.methods:
@@ -847,37 +865,37 @@ class CodeGenerator:
 
                     num_anno = self.generate_annotations('_%s_method_%s_annotation_info'%(i.name_lower, 
m.name_lower), m.annotations)
 
-                    self.c.write('static const _ExtendedGDBusMethodInfo _%s_method_info_%s =\n'
-                                 '{\n'
-                                 '  {\n'
-                                 '    -1,\n'
-                                 '    (gchar *) "%s",\n'%(i.name_lower, m.name_lower, m.name))
+                    self.outfile.write('static const _ExtendedGDBusMethodInfo _%s_method_info_%s =\n'
+                                       '{\n'
+                                       '  {\n'
+                                       '    -1,\n'
+                                       '    (gchar *) "%s",\n'%(i.name_lower, m.name_lower, m.name))
                     if len(m.in_args) == 0:
-                        self.c.write('    NULL,\n')
+                        self.outfile.write('    NULL,\n')
                     else:
-                        self.c.write('    (GDBusArgInfo **) 
&_%s_method_info_%s_IN_ARG_pointers,\n'%(i.name_lower, m.name_lower))
+                        self.outfile.write('    (GDBusArgInfo **) 
&_%s_method_info_%s_IN_ARG_pointers,\n'%(i.name_lower, m.name_lower))
                     if len(m.out_args) == 0:
-                        self.c.write('    NULL,\n')
+                        self.outfile.write('    NULL,\n')
                     else:
-                        self.c.write('    (GDBusArgInfo **) 
&_%s_method_info_%s_OUT_ARG_pointers,\n'%(i.name_lower, m.name_lower))
+                        self.outfile.write('    (GDBusArgInfo **) 
&_%s_method_info_%s_OUT_ARG_pointers,\n'%(i.name_lower, m.name_lower))
                     if num_anno == 0:
-                        self.c.write('    NULL\n')
+                        self.outfile.write('    NULL\n')
                     else:
-                        self.c.write('    (GDBusAnnotationInfo **) 
&_%s_method_%s_annotation_info_pointers\n'%(i.name_lower, m.name_lower))
-                    self.c.write('  },\n'
-                                 '  "handle-%s",\n'
-                                 '  %s\n'
-                                 %(m.name_hyphen, 'TRUE' if unix_fd else 'FALSE'))
-                    self.c.write('};\n'
-                                 '\n')
-
-                self.c.write('static const _ExtendedGDBusMethodInfo * const _%s_method_info_pointers[] =\n'
-                             '{\n'%(i.name_lower))
+                        self.outfile.write('    (GDBusAnnotationInfo **) 
&_%s_method_%s_annotation_info_pointers\n'%(i.name_lower, m.name_lower))
+                    self.outfile.write('  },\n'
+                                       '  "handle-%s",\n'
+                                       '  %s\n'
+                                       %(m.name_hyphen, 'TRUE' if unix_fd else 'FALSE'))
+                    self.outfile.write('};\n'
+                                       '\n')
+
+                self.outfile.write('static const _ExtendedGDBusMethodInfo * const _%s_method_info_pointers[] 
=\n'
+                                   '{\n'%(i.name_lower))
                 for m in i.methods:
-                    self.c.write('  &_%s_method_info_%s,\n'%(i.name_lower, m.name_lower))
-                self.c.write('  NULL\n'
-                             '};\n'
-                             '\n')
+                    self.outfile.write('  &_%s_method_info_%s,\n'%(i.name_lower, m.name_lower))
+                self.outfile.write('  NULL\n'
+                                   '};\n'
+                                   '\n')
 
             # ---
 
@@ -886,32 +904,32 @@ class CodeGenerator:
                     self.generate_args('_%s_signal_info_%s_ARG'%(i.name_lower, s.name_lower), s.args)
 
                     num_anno = self.generate_annotations('_%s_signal_%s_annotation_info'%(i.name_lower, 
s.name_lower), s.annotations)
-                    self.c.write('static const _ExtendedGDBusSignalInfo _%s_signal_info_%s =\n'
-                                 '{\n'
-                                 '  {\n'
-                                 '    -1,\n'
-                                 '    (gchar *) "%s",\n'%(i.name_lower, s.name_lower, s.name))
+                    self.outfile.write('static const _ExtendedGDBusSignalInfo _%s_signal_info_%s =\n'
+                                       '{\n'
+                                       '  {\n'
+                                       '    -1,\n'
+                                       '    (gchar *) "%s",\n'%(i.name_lower, s.name_lower, s.name))
                     if len(s.args) == 0:
-                        self.c.write('    NULL,\n')
+                        self.outfile.write('    NULL,\n')
                     else:
-                        self.c.write('    (GDBusArgInfo **) 
&_%s_signal_info_%s_ARG_pointers,\n'%(i.name_lower, s.name_lower))
+                        self.outfile.write('    (GDBusArgInfo **) 
&_%s_signal_info_%s_ARG_pointers,\n'%(i.name_lower, s.name_lower))
                     if num_anno == 0:
-                        self.c.write('    NULL\n')
+                        self.outfile.write('    NULL\n')
                     else:
-                        self.c.write('    (GDBusAnnotationInfo **) 
&_%s_signal_%s_annotation_info_pointers\n'%(i.name_lower, s.name_lower))
-                    self.c.write('  },\n'
-                                 '  "%s"\n'
-                                 %(s.name_hyphen))
-                    self.c.write('};\n'
-                                 '\n')
-
-                self.c.write('static const _ExtendedGDBusSignalInfo * const _%s_signal_info_pointers[] =\n'
-                             '{\n'%(i.name_lower))
+                        self.outfile.write('    (GDBusAnnotationInfo **) 
&_%s_signal_%s_annotation_info_pointers\n'%(i.name_lower, s.name_lower))
+                    self.outfile.write('  },\n'
+                                       '  "%s"\n'
+                                       %(s.name_hyphen))
+                    self.outfile.write('};\n'
+                                       '\n')
+
+                self.outfile.write('static const _ExtendedGDBusSignalInfo * const _%s_signal_info_pointers[] 
=\n'
+                                   '{\n'%(i.name_lower))
                 for s in i.signals:
-                    self.c.write('  &_%s_signal_info_%s,\n'%(i.name_lower, s.name_lower))
-                self.c.write('  NULL\n'
-                             '};\n'
-                             '\n')
+                    self.outfile.write('  &_%s_signal_info_%s,\n'%(i.name_lower, s.name_lower))
+                self.outfile.write('  NULL\n'
+                                   '};\n'
+                                   '\n')
 
             # ---
 
@@ -926,64 +944,64 @@ class CodeGenerator:
                     else:
                         access = 'G_DBUS_PROPERTY_INFO_FLAGS_NONE'
                     num_anno = self.generate_annotations('_%s_property_%s_annotation_info'%(i.name_lower, 
p.name_lower), p.annotations)
-                    self.c.write('static const _ExtendedGDBusPropertyInfo _%s_property_info_%s =\n'
-                                 '{\n'
-                                 '  {\n'
-                                 '    -1,\n'
-                                 '    (gchar *) "%s",\n'
-                                 '    (gchar *) "%s",\n'
-                                 '    %s,\n'%(i.name_lower, p.name_lower, p.name, p.arg.signature, access))
+                    self.outfile.write('static const _ExtendedGDBusPropertyInfo _%s_property_info_%s =\n'
+                                       '{\n'
+                                       '  {\n'
+                                       '    -1,\n'
+                                       '    (gchar *) "%s",\n'
+                                       '    (gchar *) "%s",\n'
+                                       '    %s,\n'%(i.name_lower, p.name_lower, p.name, p.arg.signature, 
access))
                     if num_anno == 0:
-                        self.c.write('    NULL\n')
+                        self.outfile.write('    NULL\n')
                     else:
-                        self.c.write('    (GDBusAnnotationInfo **) 
&_%s_property_%s_annotation_info_pointers\n'%(i.name_lower, p.name_lower))
-                    self.c.write('  },\n'
-                                 '  "%s",\n'
-                                 %(p.name_hyphen))
+                        self.outfile.write('    (GDBusAnnotationInfo **) 
&_%s_property_%s_annotation_info_pointers\n'%(i.name_lower, p.name_lower))
+                    self.outfile.write('  },\n'
+                                       '  "%s",\n'
+                                       %(p.name_hyphen))
                     if not utils.lookup_annotation(p.annotations, 'org.gtk.GDBus.C.ForceGVariant'):
-                        self.c.write('  FALSE\n')
+                        self.outfile.write('  FALSE\n')
                     else:
-                        self.c.write('  TRUE\n')
-                    self.c.write('};\n'
-                                 '\n')
+                        self.outfile.write('  TRUE\n')
+                    self.outfile.write('};\n'
+                                       '\n')
 
-                self.c.write('static const _ExtendedGDBusPropertyInfo * const _%s_property_info_pointers[] 
=\n'
-                             '{\n'%(i.name_lower))
+                self.outfile.write('static const _ExtendedGDBusPropertyInfo * const 
_%s_property_info_pointers[] =\n'
+                                   '{\n'%(i.name_lower))
                 for p in i.properties:
-                    self.c.write('  &_%s_property_info_%s,\n'%(i.name_lower, p.name_lower))
-                self.c.write('  NULL\n'
-                             '};\n'
-                             '\n')
+                    self.outfile.write('  &_%s_property_info_%s,\n'%(i.name_lower, p.name_lower))
+                self.outfile.write('  NULL\n'
+                                   '};\n'
+                                   '\n')
 
             num_anno = self.generate_annotations('_%s_annotation_info'%(i.name_lower), i.annotations)
-            self.c.write('static const _ExtendedGDBusInterfaceInfo _%s_interface_info =\n'
-                         '{\n'
-                         '  {\n'
-                         '    -1,\n'
-                         '    (gchar *) "%s",\n'%(i.name_lower, i.name))
+            self.outfile.write('static const _ExtendedGDBusInterfaceInfo _%s_interface_info =\n'
+                               '{\n'
+                               '  {\n'
+                               '    -1,\n'
+                               '    (gchar *) "%s",\n'%(i.name_lower, i.name))
             if len(i.methods) == 0:
-                self.c.write('    NULL,\n')
+                self.outfile.write('    NULL,\n')
             else:
-                self.c.write('    (GDBusMethodInfo **) &_%s_method_info_pointers,\n'%(i.name_lower))
+                self.outfile.write('    (GDBusMethodInfo **) &_%s_method_info_pointers,\n'%(i.name_lower))
             if len(i.signals) == 0:
-                self.c.write('    NULL,\n')
+                self.outfile.write('    NULL,\n')
             else:
-                self.c.write('    (GDBusSignalInfo **) &_%s_signal_info_pointers,\n'%(i.name_lower))
+                self.outfile.write('    (GDBusSignalInfo **) &_%s_signal_info_pointers,\n'%(i.name_lower))
             if len(i.properties) == 0:
-                self.c.write('    NULL,\n')
+                self.outfile.write('    NULL,\n')
             else:
-                self.c.write('    (GDBusPropertyInfo **) &_%s_property_info_pointers,\n'%(i.name_lower))
+                self.outfile.write('    (GDBusPropertyInfo **) 
&_%s_property_info_pointers,\n'%(i.name_lower))
             if num_anno == 0:
-                self.c.write('    NULL\n')
+                self.outfile.write('    NULL\n')
             else:
-                self.c.write('    (GDBusAnnotationInfo **) &_%s_annotation_info_pointers\n'%(i.name_lower))
-            self.c.write('  },\n'
-                         '  "%s",\n'
-                         '};\n'
-                         '\n'
-                         %(i.name_hyphen))
-            self.c.write('\n')
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write('    (GDBusAnnotationInfo **) 
&_%s_annotation_info_pointers\n'%(i.name_lower))
+            self.outfile.write('  },\n'
+                               '  "%s",\n'
+                               '};\n'
+                               '\n'
+                               %(i.name_hyphen))
+            self.outfile.write('\n')
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %s_interface_info:\n'
                     ' *\n'
@@ -991,15 +1009,15 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: (transfer none): A #GDBusInterfaceInfo. Do not free.\n'
                     %(i.name_lower, i.name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-            self.c.write('GDBusInterfaceInfo *\n'
-                         '%s_interface_info (void)\n'
-                         '{\n'
-                         '  return (GDBusInterfaceInfo *) &_%s_interface_info.parent_struct;\n'
-                         '}\n'
-                         '\n'%(i.name_lower, i.name_lower))
-
-            self.c.write(self.docbook_gen.expand(
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+            self.outfile.write('GDBusInterfaceInfo *\n'
+                               '%s_interface_info (void)\n'
+                               '{\n'
+                               '  return (GDBusInterfaceInfo *) &_%s_interface_info.parent_struct;\n'
+                                '}\n'
+                                '\n'%(i.name_lower, i.name_lower))
+
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %s_override_properties:\n'
                     ' * @klass: The class structure for a #GObject derived class.\n'
@@ -1010,32 +1028,32 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: The last property id.\n'
                     %(i.name_lower, i.camel_name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-            self.c.write('guint\n'
-                         '%s_override_properties (GObjectClass *klass, guint property_id_begin)\n'
-                         '{\n'%(i.name_lower))
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+            self.outfile.write('guint\n'
+                               '%s_override_properties (GObjectClass *klass, guint property_id_begin)\n'
+                               '{\n'%(i.name_lower))
             for p in i.properties:
-                self.c.write ('  g_object_class_override_property (klass, property_id_begin++, 
"%s");\n'%(p.name_hyphen))
-            self.c.write('  return property_id_begin - 1;\n'
-                         '}\n'
-                         '\n')
-            self.c.write('\n')
+                self.outfile.write('  g_object_class_override_property (klass, property_id_begin++, 
"%s");\n'%(p.name_hyphen))
+            self.outfile.write('  return property_id_begin - 1;\n'
+                               '}\n'
+                               '\n')
+            self.outfile.write('\n')
 
     # ----------------------------------------------------------------------------------------------------
 
     def generate_interface(self, i):
-        self.c.write('\n')
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s:\n'
                 ' *\n'
                 ' * Abstract interface type for the D-Bus interface #%s.\n'
                 %(i.camel_name, i.name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sIface:\n'
                 ' * @parent_iface: The parent interface.\n'
@@ -1061,40 +1079,40 @@ class CodeGenerator:
                 value += 'Getter for the #%s:%s property.'%(i.camel_name, p.name_hyphen)
                 doc_bits[key] = value
         for key in sorted(doc_bits.keys(), key=utils.version_cmp_key):
-            self.c.write(' * %s\n'%doc_bits[key])
+            self.outfile.write(' * %s\n'%doc_bits[key])
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 ' *\n'
                 ' * Virtual table for the D-Bus interface #%s.\n'
                 %(i.name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
 
-        self.c.write('typedef %sIface %sInterface;\n'%(i.camel_name, i.camel_name))
-        self.c.write('G_DEFINE_INTERFACE (%s, %s, G_TYPE_OBJECT)\n'%(i.camel_name, i.name_lower))
-        self.c.write('\n')
+        self.outfile.write('typedef %sIface %sInterface;\n'%(i.camel_name, i.camel_name))
+        self.outfile.write('G_DEFINE_INTERFACE (%s, %s, G_TYPE_OBJECT)\n'%(i.camel_name, i.name_lower))
+        self.outfile.write('\n')
 
-        self.c.write('static void\n'
-                     '%s_default_init (%sIface *iface)\n'
-                     '{\n'%(i.name_lower, i.camel_name));
+        self.outfile.write('static void\n'
+                           '%s_default_init (%sIface *iface)\n'
+                           '{\n'%(i.name_lower, i.camel_name));
 
         if len(i.methods) > 0:
-            self.c.write('  /* GObject signals for incoming D-Bus method calls: */\n')
+            self.outfile.write('  /* GObject signals for incoming D-Bus method calls: */\n')
             for m in i.methods:
                 unix_fd = False
                 if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
                     unix_fd = True
-                self.c.write(self.docbook_gen.expand(
+                self.outfile.write(self.docbook_gen.expand(
                         '  /**\n'
                         '   * %s::handle-%s:\n'
                         '   * @object: A #%s.\n'
                         '   * @invocation: A #GDBusMethodInvocation.\n'
                         %(i.camel_name, m.name_hyphen, i.camel_name), False))
                 if unix_fd:
-                    self.c.write ('   * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
+                    self.outfile.write('   * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
                 for a in m.in_args:
-                    self.c.write ('   * @arg_%s: Argument passed by remote caller.\n'%(a.name))
-                self.c.write(self.docbook_gen.expand(
+                    self.outfile.write('   * @arg_%s: Argument passed by remote caller.\n'%(a.name))
+                self.outfile.write(self.docbook_gen.expand(
                         '   *\n'
                         '   * Signal emitted when a remote caller is invoking the %s.%s() D-Bus method.\n'
                         '   *\n'
@@ -1102,63 +1120,63 @@ class CodeGenerator:
                         '   *\n'
                         '   * Returns: %%TRUE if the invocation was handled, %%FALSE to let other signal 
handlers run.\n'
                         %(i.name, m.name, i.name_lower, m.name_lower), False))
-                self.write_gtkdoc_deprecated_and_since_and_close(m, self.c, 2)
+                self.write_gtkdoc_deprecated_and_since_and_close(m, self.outfile, 2)
                 if unix_fd:
                     extra_args = 2
                 else:
                     extra_args = 1
-                self.c.write('  g_signal_new ("handle-%s",\n'
-                             '    G_TYPE_FROM_INTERFACE (iface),\n'
-                             '    G_SIGNAL_RUN_LAST,\n'
-                             '    G_STRUCT_OFFSET (%sIface, handle_%s),\n'
-                             '    g_signal_accumulator_true_handled,\n'
-                             '    NULL,\n' # accu_data
-                             '    g_cclosure_marshal_generic,\n'
-                             '    G_TYPE_BOOLEAN,\n'
-                             '    %d,\n'
-                             '    G_TYPE_DBUS_METHOD_INVOCATION'
-                             %(m.name_hyphen, i.camel_name, m.name_lower, len(m.in_args) + extra_args))
+                self.outfile.write('  g_signal_new ("handle-%s",\n'
+                                   '    G_TYPE_FROM_INTERFACE (iface),\n'
+                                   '    G_SIGNAL_RUN_LAST,\n'
+                                   '    G_STRUCT_OFFSET (%sIface, handle_%s),\n'
+                                   '    g_signal_accumulator_true_handled,\n'
+                                   '    NULL,\n' # accu_data
+                                   '    g_cclosure_marshal_generic,\n'
+                                   '    G_TYPE_BOOLEAN,\n'
+                                   '    %d,\n'
+                                   '    G_TYPE_DBUS_METHOD_INVOCATION'
+                                   %(m.name_hyphen, i.camel_name, m.name_lower, len(m.in_args) + extra_args))
                 if unix_fd:
-                    self.c.write(', G_TYPE_UNIX_FD_LIST')
+                    self.outfile.write(', G_TYPE_UNIX_FD_LIST')
                 for a in m.in_args:
-                    self.c.write (', %s'%(a.gtype))
-                self.c.write(');\n')
-                self.c.write('\n')
+                    self.outfile.write(', %s'%(a.gtype))
+                self.outfile.write(');\n')
+                self.outfile.write('\n')
 
         if len(i.signals) > 0:
-            self.c.write('  /* GObject signals for received D-Bus signals: */\n')
+            self.outfile.write('  /* GObject signals for received D-Bus signals: */\n')
             for s in i.signals:
-                self.c.write(self.docbook_gen.expand(
+                self.outfile.write(self.docbook_gen.expand(
                         '  /**\n'
                         '   * %s::%s:\n'
                         '   * @object: A #%s.\n'
                         %(i.camel_name, s.name_hyphen, i.camel_name), False))
                 for a in s.args:
-                    self.c.write ('   * @arg_%s: Argument.\n'%(a.name))
-                self.c.write(self.docbook_gen.expand(
+                    self.outfile.write('   * @arg_%s: Argument.\n'%(a.name))
+                self.outfile.write(self.docbook_gen.expand(
                         '   *\n'
                         '   * On the client-side, this signal is emitted whenever the D-Bus signal #%s::%s 
is received.\n'
                         '   *\n'
                         '   * On the service-side, this signal can be used with e.g. g_signal_emit_by_name() 
to make the object emit the D-Bus signal.\n'
                         %(i.name, s.name), False))
-                self.write_gtkdoc_deprecated_and_since_and_close(s, self.c, 2)
-                self.c.write('  g_signal_new ("%s",\n'
-                             '    G_TYPE_FROM_INTERFACE (iface),\n'
-                             '    G_SIGNAL_RUN_LAST,\n'
-                             '    G_STRUCT_OFFSET (%sIface, %s),\n'
-                             '    NULL,\n' # accumulator
-                             '    NULL,\n' # accu_data
-                             '    g_cclosure_marshal_generic,\n'
-                             '    G_TYPE_NONE,\n'
-                             '    %d'
-                             %(s.name_hyphen, i.camel_name, s.name_lower, len(s.args)))
+                self.write_gtkdoc_deprecated_and_since_and_close(s, self.outfile, 2)
+                self.outfile.write('  g_signal_new ("%s",\n'
+                                   '    G_TYPE_FROM_INTERFACE (iface),\n'
+                                   '    G_SIGNAL_RUN_LAST,\n'
+                                   '    G_STRUCT_OFFSET (%sIface, %s),\n'
+                                   '    NULL,\n' # accumulator
+                                   '    NULL,\n' # accu_data
+                                   '    g_cclosure_marshal_generic,\n'
+                                   '    G_TYPE_NONE,\n'
+                                   '    %d'
+                                   %(s.name_hyphen, i.camel_name, s.name_lower, len(s.args)))
                 for a in s.args:
-                    self.c.write (', %s'%(a.gtype))
-                self.c.write(');\n')
-                self.c.write('\n')
+                    self.outfile.write(', %s'%(a.gtype))
+                self.outfile.write(');\n')
+                self.outfile.write('\n')
 
         if len(i.properties) > 0:
-            self.c.write('  /* GObject properties for D-Bus properties: */\n')
+            self.outfile.write('  /* GObject properties for D-Bus properties: */\n')
             for p in i.properties:
                 if p.readable and p.writable:
                     hint = 'Since the D-Bus property for this #GObject property is both readable and 
writable, it is meaningful to both read from it and write to it on both the service- and client-side.'
@@ -1168,7 +1186,7 @@ class CodeGenerator:
                     hint = 'Since the D-Bus property for this #GObject property is writable but not 
readable, it is meaningful to write to it on both the client- and service-side. It is only meaningful, 
however, to read from it on the service-side.'
                 else:
                     print_error('Cannot handle property "{}" that neither readable nor 
writable'.format(p.name))
-                self.c.write(self.docbook_gen.expand(
+                self.outfile.write(self.docbook_gen.expand(
                         '  /**\n'
                         '   * %s:%s:\n'
                         '   *\n'
@@ -1176,8 +1194,8 @@ class CodeGenerator:
                         '   *\n'
                         '   * %s\n'
                         %(i.camel_name, p.name_hyphen, i.name, p.name, hint), False))
-                self.write_gtkdoc_deprecated_and_since_and_close(p, self.c, 2)
-                self.c.write('  g_object_interface_install_property (iface,\n')
+                self.write_gtkdoc_deprecated_and_since_and_close(p, self.outfile, 2)
+                self.outfile.write('  g_object_interface_install_property (iface,\n')
                 if p.arg.gtype == 'G_TYPE_VARIANT':
                     s = 'g_param_spec_variant ("%s", "%s", "%s", G_VARIANT_TYPE ("%s"), 
NULL'%(p.name_hyphen, p.name, p.name, p.arg.signature)
                 elif p.arg.signature == 'b':
@@ -1214,11 +1232,11 @@ class CodeGenerator:
                     s = 'g_param_spec_boxed ("%s", "%s", "%s", G_TYPE_STRV'%(p.name_hyphen, p.name, p.name)
                 else:
                     print_error('Unsupported gtype "{}" for GParamSpec'.format(p.arg.gtype))
-                self.c.write('    %s, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));'%s);
-                self.c.write('\n')
+                self.outfile.write('    %s, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));'%s);
+                self.outfile.write('\n')
 
-        self.c.write('}\n'
-                     '\n')
+        self.outfile.write('}\n'
+                           '\n')
 
     # ----------------------------------------------------------------------------------------------------
 
@@ -1233,7 +1251,7 @@ class CodeGenerator:
                 hint = 'Since this D-Bus property is not readable, it is only meaningful to use this 
function on the service-side.'
             else:
                 print_error('Cannot handle property "{}" that neither readable nor writable'.format(p.name))
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %s_get_%s: (skip)\n'
                     ' * @object: A #%s.\n'
@@ -1244,22 +1262,22 @@ class CodeGenerator:
                     ' *\n'
                     %(i.name_lower, p.name_lower, i.camel_name, i.name, p.name, hint), False))
             if p.arg.free_func != None:
-                self.c.write(' * <warning>The returned value is only valid until the property changes so on 
the client-side it is only safe to use this function on the thread where @object was constructed. Use 
%s_dup_%s() if on another thread.</warning>\n'
-                             ' *\n'
-                             ' * Returns: (transfer none): The property value or %%NULL if the property is 
not set. Do not free the returned value, it belongs to @object.\n'
-                             %(i.name_lower, p.name_lower))
+                self.outfile.write(' * <warning>The returned value is only valid until the property changes 
so on the client-side it is only safe to use this function on the thread where @object was constructed. Use 
%s_dup_%s() if on another thread.</warning>\n'
+                                   ' *\n'
+                                   ' * Returns: (transfer none): The property value or %%NULL if the 
property is not set. Do not free the returned value, it belongs to @object.\n'
+                                   %(i.name_lower, p.name_lower))
             else:
-                self.c.write(' * Returns: The property value.\n')
-            self.write_gtkdoc_deprecated_and_since_and_close(p, self.c, 0)
-            self.c.write('%s\n'
-                         '%s_get_%s (%s *object)\n'
-                         '{\n'%(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name))
-            self.c.write('  return %s%s_GET_IFACE (object)->get_%s (object);\n'%(i.ns_upper, i.name_upper, 
p.name_lower))
-            self.c.write('}\n')
-            self.c.write('\n')
+                self.outfile.write(' * Returns: The property value.\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(p, self.outfile, 0)
+            self.outfile.write('%s\n'
+                               '%s_get_%s (%s *object)\n'
+                               '{\n'%(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name))
+            self.outfile.write('  return %s%s_GET_IFACE (object)->get_%s (object);\n'%(i.ns_upper, 
i.name_upper, p.name_lower))
+            self.outfile.write('}\n')
+            self.outfile.write('\n')
             if p.arg.free_func != None:
 
-                self.c.write(self.docbook_gen.expand(
+                self.outfile.write(self.docbook_gen.expand(
                         '/**\n'
                         ' * %s_dup_%s: (skip)\n'
                         ' * @object: A #%s.\n'
@@ -1270,15 +1288,15 @@ class CodeGenerator:
                         ' *\n'
                         ' * Returns: (transfer full): The property value or %%NULL if the property is not 
set. The returned value should be freed with %s().\n'
                         %(i.name_lower, p.name_lower, i.camel_name, i.name, p.name, hint, p.arg.free_func), 
False))
-                self.write_gtkdoc_deprecated_and_since_and_close(p, self.c, 0)
-                self.c.write('%s\n'
-                             '%s_dup_%s (%s *object)\n'
-                             '{\n'
-                             '  %svalue;\n'%(p.arg.ctype_in_dup, i.name_lower, p.name_lower, i.camel_name, 
p.arg.ctype_in_dup))
-                self.c.write('  g_object_get (G_OBJECT (object), "%s", &value, NULL);\n'%(p.name_hyphen))
-                self.c.write('  return value;\n')
-                self.c.write('}\n')
-                self.c.write('\n')
+                self.write_gtkdoc_deprecated_and_since_and_close(p, self.outfile, 0)
+                self.outfile.write('%s\n'
+                                   '%s_dup_%s (%s *object)\n'
+                                   '{\n'
+                                   '  %svalue;\n'%(p.arg.ctype_in_dup, i.name_lower, p.name_lower, 
i.camel_name, p.arg.ctype_in_dup))
+                self.outfile.write('  g_object_get (G_OBJECT (object), "%s", &value, 
NULL);\n'%(p.name_hyphen))
+                self.outfile.write('  return value;\n')
+                self.outfile.write('}\n')
+                self.outfile.write('\n')
 
             # setter
             if p.readable and p.writable:
@@ -1289,7 +1307,7 @@ class CodeGenerator:
                 hint = 'Since this D-Bus property is writable, it is meaningful to use this function on both 
the client- and service-side.'
             else:
                 print_error('Cannot handle property "{}" that neither readable nor writable'.format(p.name))
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %s_set_%s: (skip)\n'
                     ' * @object: A #%s.\n'
@@ -1299,43 +1317,43 @@ class CodeGenerator:
                     ' *\n'
                     ' * %s\n'
                     %(i.name_lower, p.name_lower, i.camel_name, i.name, p.name, hint), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(p, self.c, 0)
-            self.c.write('void\n'
-                         '%s_set_%s (%s *object, %svalue)\n'
-                         '{\n'%(i.name_lower, p.name_lower, i.camel_name, p.arg.ctype_in, ))
-            self.c.write('  g_object_set (G_OBJECT (object), "%s", value, NULL);\n'%(p.name_hyphen))
-            self.c.write('}\n')
-            self.c.write('\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(p, self.outfile, 0)
+            self.outfile.write('void\n'
+                               '%s_set_%s (%s *object, %svalue)\n'
+                               '{\n'%(i.name_lower, p.name_lower, i.camel_name, p.arg.ctype_in, ))
+            self.outfile.write('  g_object_set (G_OBJECT (object), "%s", value, NULL);\n'%(p.name_hyphen))
+            self.outfile.write('}\n')
+            self.outfile.write('\n')
 
     # ---------------------------------------------------------------------------------------------------
 
     def generate_signal_emitters(self, i):
         for s in i.signals:
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %s_emit_%s:\n'
                     ' * @object: A #%s.\n'
                     %(i.name_lower, s.name_lower, i.camel_name), False))
             for a in s.args:
-                self.c.write(' * @arg_%s: Argument to pass with the signal.\n'%(a.name))
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write(' * @arg_%s: Argument to pass with the signal.\n'%(a.name))
+            self.outfile.write(self.docbook_gen.expand(
                     ' *\n'
                     ' * Emits the #%s::%s D-Bus signal.\n'
                     %(i.name, s.name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(s, self.c, 0)
-            self.c.write('void\n'
-                         '%s_emit_%s (\n'
-                         '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
+            self.write_gtkdoc_deprecated_and_since_and_close(s, self.outfile, 0)
+            self.outfile.write('void\n'
+                               '%s_emit_%s (\n'
+                               '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
             for a in s.args:
-                self.c.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
-            self.c.write(')\n'
-                         '{\n'
-                         '  g_signal_emit_by_name (object, "%s"'%(s.name_hyphen))
+                self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+            self.outfile.write(')\n'
+                               '{\n'
+                               '  g_signal_emit_by_name (object, "%s"'%(s.name_hyphen))
             for a in s.args:
-                self.c.write(', arg_%s'%a.name)
-            self.c.write(');\n')
-            self.c.write('}\n'
-                         '\n')
+                self.outfile.write(', arg_%s'%a.name)
+            self.outfile.write(');\n')
+            self.outfile.write('}\n'
+                               '\n')
 
     # ---------------------------------------------------------------------------------------------------
 
@@ -1345,15 +1363,15 @@ class CodeGenerator:
             if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
                 unix_fd = True
             # async begin
-            self.c.write('/**\n'
-                         ' * %s_call_%s:\n'
-                         ' * @proxy: A #%sProxy.\n'
-                         %(i.name_lower, m.name_lower, i.camel_name))
+            self.outfile.write('/**\n'
+                               ' * %s_call_%s:\n'
+                               ' * @proxy: A #%sProxy.\n'
+                               %(i.name_lower, m.name_lower, i.camel_name))
             for a in m.in_args:
-                self.c.write(' * @arg_%s: Argument to pass with the method invocation.\n'%(a.name))
+                self.outfile.write(' * @arg_%s: Argument to pass with the method invocation.\n'%(a.name))
             if unix_fd:
-                self.c.write(' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write(' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
+            self.outfile.write(self.docbook_gen.expand(
                     ' * @cancellable: (nullable): A #GCancellable or %%NULL.\n'
                     ' * @callback: A #GAsyncReadyCallback to call when the request is satisfied or %%NULL.\n'
                     ' * @user_data: User data to pass to @callback.\n'
@@ -1364,50 +1382,50 @@ class CodeGenerator:
                     ' *\n'
                     ' * See %s_call_%s_sync() for the synchronous, blocking version of this method.\n'
                     %(i.name, m.name, i.name_lower, m.name_lower, i.name_lower, m.name_lower), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(m, self.c, 0)
-            self.c.write('void\n'
-                         '%s_call_%s (\n'
-                         '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+            self.write_gtkdoc_deprecated_and_since_and_close(m, self.outfile, 0)
+            self.outfile.write('void\n'
+                               '%s_call_%s (\n'
+                               '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
             for a in m.in_args:
-                self.c.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+                self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
             if unix_fd:
-                self.c.write(',\n    GUnixFDList *fd_list')
-            self.c.write(',\n'
-                         '    GCancellable *cancellable,\n'
-                         '    GAsyncReadyCallback callback,\n'
-                         '    gpointer user_data)\n'
-                         '{\n')
+                self.outfile.write(',\n    GUnixFDList *fd_list')
+            self.outfile.write(',\n'
+                               '    GCancellable *cancellable,\n'
+                               '    GAsyncReadyCallback callback,\n'
+                               '    gpointer user_data)\n'
+                               '{\n')
             if unix_fd:
-                self.c.write('  g_dbus_proxy_call_with_unix_fd_list (G_DBUS_PROXY (proxy),\n')
+                self.outfile.write('  g_dbus_proxy_call_with_unix_fd_list (G_DBUS_PROXY (proxy),\n')
             else:
-                self.c.write('  g_dbus_proxy_call (G_DBUS_PROXY (proxy),\n')
-            self.c.write('    "%s",\n'
-                         '    g_variant_new ("('%(m.name))
+                self.outfile.write('  g_dbus_proxy_call (G_DBUS_PROXY (proxy),\n')
+            self.outfile.write('    "%s",\n'
+                               '    g_variant_new ("('%(m.name))
             for a in m.in_args:
-                self.c.write('%s'%(a.format_in))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_in))
+            self.outfile.write(')"')
             for a in m.in_args:
-                self.c.write(',\n                   arg_%s'%(a.name))
-            self.c.write('),\n'
-                         '    G_DBUS_CALL_FLAGS_NONE,\n'
-                         '    -1,\n')
+                self.outfile.write(',\n                   arg_%s'%(a.name))
+            self.outfile.write('),\n'
+                               '    G_DBUS_CALL_FLAGS_NONE,\n'
+                               '    -1,\n')
             if unix_fd:
-                self.c.write('    fd_list,\n')
-            self.c.write('    cancellable,\n'
-                         '    callback,\n'
-                         '    user_data);\n')
-            self.c.write('}\n'
-                         '\n')
+                self.outfile.write('    fd_list,\n')
+            self.outfile.write('    cancellable,\n'
+                               '    callback,\n'
+                               '    user_data);\n')
+            self.outfile.write('}\n'
+                               '\n')
             # async finish
-            self.c.write('/**\n'
-                         ' * %s_call_%s_finish:\n'
-                         ' * @proxy: A #%sProxy.\n'
-                         %(i.name_lower, m.name_lower, i.camel_name))
+            self.outfile.write('/**\n'
+                               ' * %s_call_%s_finish:\n'
+                               ' * @proxy: A #%sProxy.\n'
+                               %(i.name_lower, m.name_lower, i.camel_name))
             for a in m.out_args:
-                self.c.write(' * @out_%s: (out)%s: Return location for return parameter or %%NULL to 
ignore.\n'%(a.name, ' ' + a.array_annotation if a.array_annotation else ''))
+                self.outfile.write(' * @out_%s: (out)%s: Return location for return parameter or %%NULL to 
ignore.\n'%(a.name, ' ' + a.array_annotation if a.array_annotation else ''))
             if unix_fd:
-                self.c.write(' * @out_fd_list: (out): Return location for a #GUnixFDList or %NULL.\n')
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write(' * @out_fd_list: (out): Return location for a #GUnixFDList or %NULL.\n')
+            self.outfile.write(self.docbook_gen.expand(
                     ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%s_call_%s().\n'
                     ' * @error: Return location for error or %%NULL.\n'
                     ' *\n'
@@ -1415,54 +1433,54 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: (skip): %%TRUE if the call succeded, %%FALSE if @error is set.\n'
                     %(i.name_lower, m.name_lower, i.name_lower, m.name_lower), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(m, self.c, 0)
-            self.c.write('gboolean\n'
-                         '%s_call_%s_finish (\n'
-                         '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+            self.write_gtkdoc_deprecated_and_since_and_close(m, self.outfile, 0)
+            self.outfile.write('gboolean\n'
+                               '%s_call_%s_finish (\n'
+                               '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
             for a in m.out_args:
-                self.c.write(',\n    %sout_%s'%(a.ctype_out, a.name))
+                self.outfile.write(',\n    %sout_%s'%(a.ctype_out, a.name))
             if unix_fd:
-                self.c.write(',\n    GUnixFDList **out_fd_list')
-            self.c.write(',\n'
-                         '    GAsyncResult *res,\n'
-                         '    GError **error)\n'
-                         '{\n'
-                         '  GVariant *_ret;\n')
+                self.outfile.write(',\n    GUnixFDList **out_fd_list')
+            self.outfile.write(',\n'
+                               '    GAsyncResult *res,\n'
+                               '    GError **error)\n'
+                               '{\n'
+                               '  GVariant *_ret;\n')
             if unix_fd:
-                self.c.write('  _ret = g_dbus_proxy_call_with_unix_fd_list_finish (G_DBUS_PROXY (proxy), 
out_fd_list, res, error);\n')
+                self.outfile.write('  _ret = g_dbus_proxy_call_with_unix_fd_list_finish (G_DBUS_PROXY 
(proxy), out_fd_list, res, error);\n')
             else:
-                self.c.write('  _ret = g_dbus_proxy_call_finish (G_DBUS_PROXY (proxy), res, error);\n')
-            self.c.write('  if (_ret == NULL)\n'
-                         '    goto _out;\n')
-            self.c.write('  g_variant_get (_ret,\n'
-                         '                 \"(')
+                self.outfile.write('  _ret = g_dbus_proxy_call_finish (G_DBUS_PROXY (proxy), res, error);\n')
+            self.outfile.write('  if (_ret == NULL)\n'
+                               '    goto _out;\n')
+            self.outfile.write('  g_variant_get (_ret,\n'
+                               '                 \"(')
             for a in m.out_args:
-                self.c.write('%s'%(a.format_out))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_out))
+            self.outfile.write(')"')
             for a in m.out_args:
-                self.c.write(',\n                 out_%s'%(a.name))
-            self.c.write(');\n'
-                         '  g_variant_unref (_ret);\n')
-            self.c.write('_out:\n'
-                         '  return _ret != NULL;\n'
-                         '}\n'
-                         '\n')
+                self.outfile.write(',\n                 out_%s'%(a.name))
+            self.outfile.write(');\n'
+                               '  g_variant_unref (_ret);\n')
+            self.outfile.write('_out:\n'
+                               '  return _ret != NULL;\n'
+                               '}\n'
+                               '\n')
 
 
             # sync
-            self.c.write('/**\n'
-                         ' * %s_call_%s_sync:\n'
-                         ' * @proxy: A #%sProxy.\n'
-                         %(i.name_lower, m.name_lower, i.camel_name))
+            self.outfile.write('/**\n'
+                               ' * %s_call_%s_sync:\n'
+                               ' * @proxy: A #%sProxy.\n'
+                               %(i.name_lower, m.name_lower, i.camel_name))
             for a in m.in_args:
-                self.c.write(' * @arg_%s: Argument to pass with the method invocation.\n'%(a.name))
+                self.outfile.write(' * @arg_%s: Argument to pass with the method invocation.\n'%(a.name))
             if unix_fd:
-                self.c.write(' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
+                self.outfile.write(' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
             for a in m.out_args:
-                self.c.write(' * @out_%s: (out)%s: Return location for return parameter or %%NULL to 
ignore.\n'%(a.name, ' ' + a.array_annotation if a.array_annotation else ''))
+                self.outfile.write(' * @out_%s: (out)%s: Return location for return parameter or %%NULL to 
ignore.\n'%(a.name, ' ' + a.array_annotation if a.array_annotation else ''))
             if unix_fd:
-                self.c.write(' * @out_fd_list: (out): Return location for a #GUnixFDList or %NULL.\n')
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write(' * @out_fd_list: (out): Return location for a #GUnixFDList or %NULL.\n')
+            self.outfile.write(self.docbook_gen.expand(
                     ' * @cancellable: (nullable): A #GCancellable or %%NULL.\n'
                     ' * @error: Return location for error or %%NULL.\n'
                     ' *\n'
@@ -1472,57 +1490,57 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: (skip): %%TRUE if the call succeded, %%FALSE if @error is set.\n'
                     %(i.name, m.name, i.name_lower, m.name_lower), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(m, self.c, 0)
-            self.c.write('gboolean\n'
-                         '%s_call_%s_sync (\n'
-                         '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
+            self.write_gtkdoc_deprecated_and_since_and_close(m, self.outfile, 0)
+            self.outfile.write('gboolean\n'
+                               '%s_call_%s_sync (\n'
+                               '    %s *proxy'%(i.name_lower, m.name_lower, i.camel_name))
             for a in m.in_args:
-                self.c.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+                self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
             if unix_fd:
-                self.c.write(',\n    GUnixFDList  *fd_list')
+                self.outfile.write(',\n    GUnixFDList  *fd_list')
             for a in m.out_args:
-                self.c.write(',\n    %sout_%s'%(a.ctype_out, a.name))
+                self.outfile.write(',\n    %sout_%s'%(a.ctype_out, a.name))
             if unix_fd:
-                self.c.write(',\n    GUnixFDList **out_fd_list')
-            self.c.write(',\n'
-                         '    GCancellable *cancellable,\n'
-                         '    GError **error)\n'
-                         '{\n'
-                         '  GVariant *_ret;\n')
+                self.outfile.write(',\n    GUnixFDList **out_fd_list')
+            self.outfile.write(',\n'
+                               '    GCancellable *cancellable,\n'
+                               '    GError **error)\n'
+                               '{\n'
+                               '  GVariant *_ret;\n')
             if unix_fd:
-                self.c.write('  _ret = g_dbus_proxy_call_with_unix_fd_list_sync (G_DBUS_PROXY (proxy),\n')
+                self.outfile.write('  _ret = g_dbus_proxy_call_with_unix_fd_list_sync (G_DBUS_PROXY 
(proxy),\n')
             else:
-                self.c.write('  _ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),\n')
-            self.c.write('    "%s",\n'
-                         '    g_variant_new ("('%(m.name))
+                self.outfile.write('  _ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),\n')
+            self.outfile.write('    "%s",\n'
+                               '    g_variant_new ("('%(m.name))
             for a in m.in_args:
-                self.c.write('%s'%(a.format_in))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_in))
+            self.outfile.write(')"')
             for a in m.in_args:
-                self.c.write(',\n                   arg_%s'%(a.name))
-            self.c.write('),\n'
-                         '    G_DBUS_CALL_FLAGS_NONE,\n'
-                         '    -1,\n')
+                self.outfile.write(',\n                   arg_%s'%(a.name))
+            self.outfile.write('),\n'
+                               '    G_DBUS_CALL_FLAGS_NONE,\n'
+                               '    -1,\n')
             if unix_fd:
-                self.c.write('    fd_list,\n'
-                             '    out_fd_list,\n')
-            self.c.write('    cancellable,\n'
-                         '    error);\n'
-                         '  if (_ret == NULL)\n'
-                         '    goto _out;\n')
-            self.c.write('  g_variant_get (_ret,\n'
-                         '                 \"(')
+                self.outfile.write('    fd_list,\n'
+                                   '    out_fd_list,\n')
+            self.outfile.write('    cancellable,\n'
+                               '    error);\n'
+                               '  if (_ret == NULL)\n'
+                               '    goto _out;\n')
+            self.outfile.write('  g_variant_get (_ret,\n'
+                               '                 \"(')
             for a in m.out_args:
-                self.c.write('%s'%(a.format_out))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_out))
+            self.outfile.write(')"')
             for a in m.out_args:
-                self.c.write(',\n                 out_%s'%(a.name))
-            self.c.write(');\n'
-                         '  g_variant_unref (_ret);\n')
-            self.c.write('_out:\n'
-                         '  return _ret != NULL;\n'
-                         '}\n'
-                         '\n')
+                self.outfile.write(',\n                 out_%s'%(a.name))
+            self.outfile.write(');\n'
+                               '  g_variant_unref (_ret);\n')
+            self.outfile.write('_out:\n'
+                               '  return _ret != NULL;\n'
+                               '}\n'
+                               '\n')
 
     # ---------------------------------------------------------------------------------------------------
 
@@ -1531,280 +1549,280 @@ class CodeGenerator:
             unix_fd = False
             if utils.lookup_annotation(m.annotations, 'org.gtk.GDBus.C.UnixFD'):
                 unix_fd = True
-            self.c.write('/**\n'
-                         ' * %s_complete_%s:\n'
-                         ' * @object: A #%s.\n'
-                         ' * @invocation: (transfer full): A #GDBusMethodInvocation.\n'
-                         %(i.name_lower, m.name_lower, i.camel_name))
+            self.outfile.write('/**\n'
+                               ' * %s_complete_%s:\n'
+                               ' * @object: A #%s.\n'
+                               ' * @invocation: (transfer full): A #GDBusMethodInvocation.\n'
+                               %(i.name_lower, m.name_lower, i.camel_name))
             if unix_fd:
-                self.c.write (' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
+                self.outfile.write(' * @fd_list: (nullable): A #GUnixFDList or %NULL.\n')
             for a in m.out_args:
-                self.c.write(' * @%s: Parameter to return.\n'%(a.name))
-            self.c.write(self.docbook_gen.expand(
+                self.outfile.write(' * @%s: Parameter to return.\n'%(a.name))
+            self.outfile.write(self.docbook_gen.expand(
                     ' *\n'
                     ' * Helper function used in service implementations to finish handling invocations of 
the %s.%s() D-Bus method. If you instead want to finish handling an invocation by returning an error, use 
g_dbus_method_invocation_return_error() or similar.\n'
                     ' *\n'
                     ' * This method will free @invocation, you cannot use it afterwards.\n'
                     %(i.name, m.name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(m, self.c, 0)
-            self.c.write('void\n'
-                         '%s_complete_%s (\n'
-                         '    %s *object,\n'
-                         '    GDBusMethodInvocation *invocation'%(i.name_lower, m.name_lower, i.camel_name))
+            self.write_gtkdoc_deprecated_and_since_and_close(m, self.outfile, 0)
+            self.outfile.write('void\n'
+                               '%s_complete_%s (\n'
+                               '    %s *object,\n'
+                               '    GDBusMethodInvocation *invocation'%(i.name_lower, m.name_lower, 
i.camel_name))
             if unix_fd:
-                self.c.write(',\n    GUnixFDList *fd_list')
+                self.outfile.write(',\n    GUnixFDList *fd_list')
             for a in m.out_args:
-                self.c.write(',\n    %s%s'%(a.ctype_in, a.name))
-            self.c.write(')\n'
-                         '{\n')
+                self.outfile.write(',\n    %s%s'%(a.ctype_in, a.name))
+            self.outfile.write(')\n'
+                               '{\n')
 
             if unix_fd:
-                self.c.write('  g_dbus_method_invocation_return_value_with_unix_fd_list (invocation,\n'
-                             '    g_variant_new ("(')
+                self.outfile.write('  g_dbus_method_invocation_return_value_with_unix_fd_list (invocation,\n'
+                                   '    g_variant_new ("(')
             else:
-                self.c.write('  g_dbus_method_invocation_return_value (invocation,\n'
-                             '    g_variant_new ("(')
+                self.outfile.write('  g_dbus_method_invocation_return_value (invocation,\n'
+                                   '    g_variant_new ("(')
             for a in m.out_args:
-                self.c.write('%s'%(a.format_in))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_in))
+            self.outfile.write(')"')
             for a in m.out_args:
-                self.c.write(',\n                   %s'%(a.name))
+                self.outfile.write(',\n                   %s'%(a.name))
             if unix_fd:
-                self.c.write('),\n    fd_list);\n')
+                self.outfile.write('),\n    fd_list);\n')
             else:
-                self.c.write('));\n')
-            self.c.write('}\n'
-                         '\n')
+                self.outfile.write('));\n')
+            self.outfile.write('}\n'
+                               '\n')
 
     # ---------------------------------------------------------------------------------------------------
 
     def generate_proxy(self, i):
         # class boilerplate
-        self.c.write('/* ------------------------------------------------------------------------ */\n'
-                     '\n')
+        self.outfile.write('/* ------------------------------------------------------------------------ */\n'
+                           '\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sProxy:\n'
                 ' *\n'
                 ' * The #%sProxy structure contains only private data and should only be accessed using the 
provided API.\n'
                 %(i.camel_name, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sProxyClass:\n'
                 ' * @parent_class: The parent class.\n'
                 ' *\n'
                 ' * Class structure for #%sProxy.\n'
                 %(i.camel_name, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
-
-        self.c.write('struct _%sProxyPrivate\n'
-                     '{\n'
-                     '  GData *qdata;\n'
-                     '};\n'
-                     '\n'%i.camel_name)
-
-        self.c.write('static void %s_proxy_iface_init (%sIface *iface);\n'
-                     '\n'%(i.name_lower, i.camel_name))
-        self.c.write('#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n')
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sProxy, %s_proxy, G_TYPE_DBUS_PROXY,\n'%(i.camel_name, 
i.name_lower))
-        self.c.write('                         G_ADD_PRIVATE (%sProxy)\n'%(i.camel_name))
-        self.c.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_proxy_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
-        self.c.write('#else\n')
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sProxy, %s_proxy, G_TYPE_DBUS_PROXY,\n'%(i.camel_name, 
i.name_lower))
-        self.c.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_proxy_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
-        self.c.write('#endif\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
+
+        self.outfile.write('struct _%sProxyPrivate\n'
+                           '{\n'
+                           '  GData *qdata;\n'
+                           '};\n'
+                           '\n'%i.camel_name)
+
+        self.outfile.write('static void %s_proxy_iface_init (%sIface *iface);\n'
+                           '\n'%(i.name_lower, i.camel_name))
+        self.outfile.write('#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n')
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sProxy, %s_proxy, G_TYPE_DBUS_PROXY,\n'%(i.camel_name, 
i.name_lower))
+        self.outfile.write('                         G_ADD_PRIVATE (%sProxy)\n'%(i.camel_name))
+        self.outfile.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_proxy_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
+        self.outfile.write('#else\n')
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sProxy, %s_proxy, G_TYPE_DBUS_PROXY,\n'%(i.camel_name, 
i.name_lower))
+        self.outfile.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_proxy_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
+        self.outfile.write('#endif\n')
 
         # finalize
-        self.c.write('static void\n'
-                     '%s_proxy_finalize (GObject *object)\n'
-                     '{\n'%(i.name_lower))
-        self.c.write('  %sProxy *proxy = %s%s_PROXY (object);\n'%(i.camel_name, i.ns_upper, i.name_upper))
-        self.c.write('  g_datalist_clear (&proxy->priv->qdata);\n')
-        self.c.write('  G_OBJECT_CLASS (%s_proxy_parent_class)->finalize (object);\n'
-                     '}\n'
-                     '\n'%(i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_proxy_finalize (GObject *object)\n'
+                           '{\n'%(i.name_lower))
+        self.outfile.write('  %sProxy *proxy = %s%s_PROXY (object);\n'%(i.camel_name, i.ns_upper, 
i.name_upper))
+        self.outfile.write('  g_datalist_clear (&proxy->priv->qdata);\n')
+        self.outfile.write('  G_OBJECT_CLASS (%s_proxy_parent_class)->finalize (object);\n'
+                           '}\n'
+                           '\n'%(i.name_lower))
 
         # property accessors
         #
         # Note that we are guaranteed that prop_id starts at 1 and is
         # laid out in the same order as introspection data pointers
         #
-        self.c.write('static void\n'
-                     '%s_proxy_get_property (GObject      *object,\n'
-                     '  guint         prop_id,\n'
-                     '  GValue       *value,\n'
-                     '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
-                     '{\n'%(i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_proxy_get_property (GObject      *object,\n'
+                           '  guint         prop_id,\n'
+                           '  GValue       *value,\n'
+                           '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
+                           '{\n'%(i.name_lower))
         if len(i.properties) > 0:
-            self.c.write('  const _ExtendedGDBusPropertyInfo *info;\n'
-                         '  GVariant *variant;\n'
-                         '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
-                         '  info = _%s_property_info_pointers[prop_id - 1];\n'
-                         '  variant = g_dbus_proxy_get_cached_property (G_DBUS_PROXY (object), 
info->parent_struct.name);\n'
-                         '  if (info->use_gvariant)\n'
-                         '    {\n'
-                         '      g_value_set_variant (value, variant);\n'
-                         '    }\n'
-                         '  else\n'
-                         '    {\n'
-                         # could be that we don't have the value in cache - in that case, we do
-                         # nothing and the user gets the default value for the GType
-                         '      if (variant != NULL)\n'
-                         '        g_dbus_gvariant_to_gvalue (variant, value);\n'
-                         '    }\n'
-                         '  if (variant != NULL)\n'
-                         '    g_variant_unref (variant);\n'
-                         %(len(i.properties), i.name_lower))
-        self.c.write('}\n'
-                     '\n')
+            self.outfile.write('  const _ExtendedGDBusPropertyInfo *info;\n'
+                               '  GVariant *variant;\n'
+                               '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
+                               '  info = _%s_property_info_pointers[prop_id - 1];\n'
+                               '  variant = g_dbus_proxy_get_cached_property (G_DBUS_PROXY (object), 
info->parent_struct.name);\n'
+                               '  if (info->use_gvariant)\n'
+                               '    {\n'
+                               '      g_value_set_variant (value, variant);\n'
+                               '    }\n'
+                               '  else\n'
+                               '    {\n'
+                               # could be that we don't have the value in cache - in that case, we do
+                               # nothing and the user gets the default value for the GType
+                               '      if (variant != NULL)\n'
+                               '        g_dbus_gvariant_to_gvalue (variant, value);\n'
+                               '    }\n'
+                               '  if (variant != NULL)\n'
+                               '    g_variant_unref (variant);\n'
+                               %(len(i.properties), i.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
         if len(i.properties) > 0:
-            self.c.write('static void\n'
-                         '%s_proxy_set_property_cb (GDBusProxy *proxy,\n'
-                         '  GAsyncResult *res,\n'
-                         '  gpointer      user_data)\n'
-                         '{\n'%(i.name_lower))
-            self.c.write('  const _ExtendedGDBusPropertyInfo *info = user_data;\n'
-                         '  GError *error;\n'
-                         '  GVariant *_ret;\n'
-                         '  error = NULL;\n'
-                         '  _ret = g_dbus_proxy_call_finish (proxy, res, &error);\n'
-                         '  if (!_ret)\n'
-                         '    {\n'
-                         '      g_warning ("Error setting property \'%%s\' on interface %s: %%s (%%s, 
%%d)",\n'
-                         '                 info->parent_struct.name, \n'
-                         '                 error->message, g_quark_to_string (error->domain), 
error->code);\n'
-                         '      g_error_free (error);\n'
-                         '    }\n'
-                         '  else\n'
-                         '    {\n'
-                         '      g_variant_unref (_ret);\n'
-                         '    }\n'
-                         %(i.name))
-            self.c.write('}\n'
-                         '\n')
-        self.c.write('static void\n'
-                     '%s_proxy_set_property (GObject      *object,\n'
-                     '  guint         prop_id,\n'
-                     '  const GValue *value,\n'
-                     '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
-                     '{\n'%(i.name_lower))
+            self.outfile.write('static void\n'
+                               '%s_proxy_set_property_cb (GDBusProxy *proxy,\n'
+                               '  GAsyncResult *res,\n'
+                               '  gpointer      user_data)\n'
+                               '{\n'%(i.name_lower))
+            self.outfile.write('  const _ExtendedGDBusPropertyInfo *info = user_data;\n'
+                               '  GError *error;\n'
+                               '  GVariant *_ret;\n'
+                               '  error = NULL;\n'
+                               '  _ret = g_dbus_proxy_call_finish (proxy, res, &error);\n'
+                               '  if (!_ret)\n'
+                               '    {\n'
+                               '      g_warning ("Error setting property \'%%s\' on interface %s: %%s (%%s, 
%%d)",\n'
+                               '                 info->parent_struct.name, \n'
+                               '                 error->message, g_quark_to_string (error->domain), 
error->code);\n'
+                               '      g_error_free (error);\n'
+                               '    }\n'
+                               '  else\n'
+                               '    {\n'
+                               '      g_variant_unref (_ret);\n'
+                               '    }\n'
+                               %(i.name))
+            self.outfile.write('}\n'
+                               '\n')
+        self.outfile.write('static void\n'
+                           '%s_proxy_set_property (GObject      *object,\n'
+                           '  guint         prop_id,\n'
+                           '  const GValue *value,\n'
+                           '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
+                           '{\n'%(i.name_lower))
         if len(i.properties) > 0:
-            self.c.write('  const _ExtendedGDBusPropertyInfo *info;\n'
-                         '  GVariant *variant;\n'
-                         '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
-                         '  info = _%s_property_info_pointers[prop_id - 1];\n'
-                         '  variant = g_dbus_gvalue_to_gvariant (value, G_VARIANT_TYPE 
(info->parent_struct.signature));\n'
-                         '  g_dbus_proxy_call (G_DBUS_PROXY (object),\n'
-                         '    "org.freedesktop.DBus.Properties.Set",\n'
-                         '    g_variant_new ("(ssv)", "%s", info->parent_struct.name, variant),\n'
-                         '    G_DBUS_CALL_FLAGS_NONE,\n'
-                         '    -1,\n'
-                         '    NULL, (GAsyncReadyCallback) %s_proxy_set_property_cb, (GDBusPropertyInfo *) 
&info->parent_struct);\n'
-                         '  g_variant_unref (variant);\n'
-                         %(len(i.properties), i.name_lower, i.name, i.name_lower))
-        self.c.write('}\n'
-                     '\n')
+            self.outfile.write('  const _ExtendedGDBusPropertyInfo *info;\n'
+                               '  GVariant *variant;\n'
+                               '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
+                               '  info = _%s_property_info_pointers[prop_id - 1];\n'
+                               '  variant = g_dbus_gvalue_to_gvariant (value, G_VARIANT_TYPE 
(info->parent_struct.signature));\n'
+                               '  g_dbus_proxy_call (G_DBUS_PROXY (object),\n'
+                               '    "org.freedesktop.DBus.Properties.Set",\n'
+                               '    g_variant_new ("(ssv)", "%s", info->parent_struct.name, variant),\n'
+                               '    G_DBUS_CALL_FLAGS_NONE,\n'
+                               '    -1,\n'
+                               '    NULL, (GAsyncReadyCallback) %s_proxy_set_property_cb, (GDBusPropertyInfo 
*) &info->parent_struct);\n'
+                               '  g_variant_unref (variant);\n'
+                               %(len(i.properties), i.name_lower, i.name, i.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
 
         # signal received
-        self.c.write('static void\n'
-                     '%s_proxy_g_signal (GDBusProxy *proxy,\n'
-                     '  const gchar *sender_name G_GNUC_UNUSED,\n'
-                     '  const gchar *signal_name,\n'
-                     '  GVariant *parameters)\n'
-                     '{\n'%(i.name_lower))
-        self.c.write('  _ExtendedGDBusSignalInfo *info;\n'
-                     '  GVariantIter iter;\n'
-                     '  GVariant *child;\n'
-                     '  GValue *paramv;\n'
-                     '  gsize num_params;\n'
-                     '  gsize n;\n'
-                     '  guint signal_id;\n');
+        self.outfile.write('static void\n'
+                           '%s_proxy_g_signal (GDBusProxy *proxy,\n'
+                           '  const gchar *sender_name G_GNUC_UNUSED,\n'
+                           '  const gchar *signal_name,\n'
+                           '  GVariant *parameters)\n'
+                           '{\n'%(i.name_lower))
+        self.outfile.write('  _ExtendedGDBusSignalInfo *info;\n'
+                           '  GVariantIter iter;\n'
+                           '  GVariant *child;\n'
+                           '  GValue *paramv;\n'
+                           '  gsize num_params;\n'
+                           '  gsize n;\n'
+                           '  guint signal_id;\n');
         # Note: info could be NULL if we are talking to a newer version of the interface
-        self.c.write('  info = (_ExtendedGDBusSignalInfo *) g_dbus_interface_info_lookup_signal 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, signal_name);\n'
-                     '  if (info == NULL)\n'
-                     '    return;\n'
-                     %(i.name_lower))
-        self.c.write ('  num_params = g_variant_n_children (parameters);\n'
-                      '  paramv = g_new0 (GValue, num_params + 1);\n'
-                      '  g_value_init (&paramv[0], %sTYPE_%s);\n'
-                      '  g_value_set_object (&paramv[0], proxy);\n'
-                      %(i.ns_upper, i.name_upper))
-        self.c.write('  g_variant_iter_init (&iter, parameters);\n'
-                     '  n = 1;\n'
-                     '  while ((child = g_variant_iter_next_value (&iter)) != NULL)\n'
-                     '    {\n'
-                     '      _ExtendedGDBusArgInfo *arg_info = (_ExtendedGDBusArgInfo *) 
info->parent_struct.args[n - 1];\n'
-                     '      if (arg_info->use_gvariant)\n'
-                     '        {\n'
-                     '          g_value_init (&paramv[n], G_TYPE_VARIANT);\n'
-                     '          g_value_set_variant (&paramv[n], child);\n'
-                     '          n++;\n'
-                     '        }\n'
-                     '      else\n'
-                     '        g_dbus_gvariant_to_gvalue (child, &paramv[n++]);\n'
-                     '      g_variant_unref (child);\n'
-                     '    }\n'
-                     )
-        self.c.write('  signal_id = g_signal_lookup (info->signal_name, %sTYPE_%s);\n'
-                     %(i.ns_upper, i.name_upper))
-        self.c.write('  g_signal_emitv (paramv, signal_id, 0, NULL);\n')
-        self.c.write('  for (n = 0; n < num_params + 1; n++)\n'
-                     '    g_value_unset (&paramv[n]);\n'
-                     '  g_free (paramv);\n')
-        self.c.write('}\n'
-                     '\n')
+        self.outfile.write('  info = (_ExtendedGDBusSignalInfo *) g_dbus_interface_info_lookup_signal 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, signal_name);\n'
+                           '  if (info == NULL)\n'
+                           '    return;\n'
+                           %(i.name_lower))
+        self.outfile.write('  num_params = g_variant_n_children (parameters);\n'
+                           '  paramv = g_new0 (GValue, num_params + 1);\n'
+                           '  g_value_init (&paramv[0], %sTYPE_%s);\n'
+                           '  g_value_set_object (&paramv[0], proxy);\n'
+                           %(i.ns_upper, i.name_upper))
+        self.outfile.write('  g_variant_iter_init (&iter, parameters);\n'
+                           '  n = 1;\n'
+                           '  while ((child = g_variant_iter_next_value (&iter)) != NULL)\n'
+                           '    {\n'
+                           '      _ExtendedGDBusArgInfo *arg_info = (_ExtendedGDBusArgInfo *) 
info->parent_struct.args[n - 1];\n'
+                           '      if (arg_info->use_gvariant)\n'
+                           '        {\n'
+                           '          g_value_init (&paramv[n], G_TYPE_VARIANT);\n'
+                           '          g_value_set_variant (&paramv[n], child);\n'
+                           '          n++;\n'
+                           '        }\n'
+                           '      else\n'
+                           '        g_dbus_gvariant_to_gvalue (child, &paramv[n++]);\n'
+                           '      g_variant_unref (child);\n'
+                           '    }\n'
+                           )
+        self.outfile.write('  signal_id = g_signal_lookup (info->signal_name, %sTYPE_%s);\n'
+                           %(i.ns_upper, i.name_upper))
+        self.outfile.write('  g_signal_emitv (paramv, signal_id, 0, NULL);\n')
+        self.outfile.write('  for (n = 0; n < num_params + 1; n++)\n'
+                           '    g_value_unset (&paramv[n]);\n'
+                           '  g_free (paramv);\n')
+        self.outfile.write('}\n'
+                           '\n')
 
         # property changed
-        self.c.write('static void\n'
-                     '%s_proxy_g_properties_changed (GDBusProxy *_proxy,\n'
-                     '  GVariant *changed_properties,\n'
-                     '  const gchar *const *invalidated_properties)\n'
-                     '{\n'%(i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_proxy_g_properties_changed (GDBusProxy *_proxy,\n'
+                           '  GVariant *changed_properties,\n'
+                           '  const gchar *const *invalidated_properties)\n'
+                           '{\n'%(i.name_lower))
         # Note: info could be NULL if we are talking to a newer version of the interface
-        self.c.write('  %sProxy *proxy = %s%s_PROXY (_proxy);\n'
-                     '  guint n;\n'
-                     '  const gchar *key;\n'
-                     '  GVariantIter *iter;\n'
-                     '  _ExtendedGDBusPropertyInfo *info;\n'
-                     '  g_variant_get (changed_properties, "a{sv}", &iter);\n'
-                     '  while (g_variant_iter_next (iter, "{&sv}", &key, NULL))\n'
-                     '    {\n'
-                     '      info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, key);\n'
-                     '      g_datalist_remove_data (&proxy->priv->qdata, key);\n'
-                     '      if (info != NULL)\n'
-                     '        g_object_notify (G_OBJECT (proxy), info->hyphen_name);\n'
-                     '    }\n'
-                     '  g_variant_iter_free (iter);\n'
-                     '  for (n = 0; invalidated_properties[n] != NULL; n++)\n'
-                     '    {\n'
-                     '      info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, invalidated_properties[n]);\n'
-                     '      g_datalist_remove_data (&proxy->priv->qdata, invalidated_properties[n]);\n'
-                     '      if (info != NULL)\n'
-                     '        g_object_notify (G_OBJECT (proxy), info->hyphen_name);\n'
-                     '    }\n'
-                     '}\n'
-                     '\n'
-                     %(i.camel_name, i.ns_upper, i.name_upper,
-                       i.name_lower, i.name_lower))
+        self.outfile.write('  %sProxy *proxy = %s%s_PROXY (_proxy);\n'
+                           '  guint n;\n'
+                           '  const gchar *key;\n'
+                           '  GVariantIter *iter;\n'
+                           '  _ExtendedGDBusPropertyInfo *info;\n'
+                           '  g_variant_get (changed_properties, "a{sv}", &iter);\n'
+                           '  while (g_variant_iter_next (iter, "{&sv}", &key, NULL))\n'
+                           '    {\n'
+                           '      info = (_ExtendedGDBusPropertyInfo *) 
g_dbus_interface_info_lookup_property ((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, key);\n'
+                           '      g_datalist_remove_data (&proxy->priv->qdata, key);\n'
+                           '      if (info != NULL)\n'
+                           '        g_object_notify (G_OBJECT (proxy), info->hyphen_name);\n'
+                           '    }\n'
+                           '  g_variant_iter_free (iter);\n'
+                           '  for (n = 0; invalidated_properties[n] != NULL; n++)\n'
+                           '    {\n'
+                           '      info = (_ExtendedGDBusPropertyInfo *) 
g_dbus_interface_info_lookup_property ((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, 
invalidated_properties[n]);\n'
+                           '      g_datalist_remove_data (&proxy->priv->qdata, invalidated_properties[n]);\n'
+                           '      if (info != NULL)\n'
+                           '        g_object_notify (G_OBJECT (proxy), info->hyphen_name);\n'
+                           '    }\n'
+                           '}\n'
+                           '\n'
+                           %(i.camel_name, i.ns_upper, i.name_upper,
+                             i.name_lower, i.name_lower))
 
         # property vfuncs
         for p in i.properties:
             nul_value = '0'
             if p.arg.free_func != None:
                 nul_value = 'NULL'
-            self.c.write('static %s\n'
-                         '%s_proxy_get_%s (%s *object)\n'
-                         '{\n'
-                         '  %sProxy *proxy = %s%s_PROXY (object);\n'
-                         '  GVariant *variant;\n'
-                         '  %svalue = %s;\n'%(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name,
-                                              i.camel_name, i.ns_upper, i.name_upper,
-                                              p.arg.ctype_in, nul_value))
+            self.outfile.write('static %s\n'
+                               '%s_proxy_get_%s (%s *object)\n'
+                               '{\n'
+                               '  %sProxy *proxy = %s%s_PROXY (object);\n'
+                               '  GVariant *variant;\n'
+                               '  %svalue = %s;\n'%(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name,
+                                                    i.camel_name, i.ns_upper, i.name_upper,
+                                                    p.arg.ctype_in, nul_value))
             # For some property types, we have to free the returned
             # value (or part of it, e.g. the container) because of how
             # GVariant works.. see https://bugzilla.gnome.org/show_bug.cgi?id=657100
@@ -1818,81 +1836,81 @@ class CodeGenerator:
             # to the getter are valid as long as they're freed
             #
             if free_container:
-                self.c.write('  value = g_datalist_get_data (&proxy->priv->qdata, \"%s\");\n'
-                             '  if (value != NULL)\n'
-                             '    return value;\n'
-                             %(p.name))
-            self.c.write('  variant = g_dbus_proxy_get_cached_property (G_DBUS_PROXY (proxy), 
\"%s\");\n'%(p.name))
+                self.outfile.write('  value = g_datalist_get_data (&proxy->priv->qdata, \"%s\");\n'
+                                   '  if (value != NULL)\n'
+                                   '    return value;\n'
+                                   %(p.name))
+            self.outfile.write('  variant = g_dbus_proxy_get_cached_property (G_DBUS_PROXY (proxy), 
\"%s\");\n'%(p.name))
             if p.arg.gtype == 'G_TYPE_VARIANT':
-                self.c.write('  value = variant;\n')
-                self.c.write('  if (variant != NULL)\n')
-                self.c.write('    g_variant_unref (variant);\n')
+                self.outfile.write('  value = variant;\n')
+                self.outfile.write('  if (variant != NULL)\n')
+                self.outfile.write('    g_variant_unref (variant);\n')
             else:
-                self.c.write('  if (variant != NULL)\n'
-                             '    {\n')
+                self.outfile.write('  if (variant != NULL)\n'
+                                   '    {\n')
                 extra_len = ''
                 if p.arg.gvariant_get == 'g_variant_get_string' or p.arg.gvariant_get == 
'g_variant_get_strv' or p.arg.gvariant_get == 'g_variant_get_objv' or p.arg.gvariant_get == 
'g_variant_get_bytestring_array':
                     extra_len = ', NULL'
-                self.c.write('      value = %s (variant%s);\n'%(p.arg.gvariant_get, extra_len))
+                self.outfile.write('      value = %s (variant%s);\n'%(p.arg.gvariant_get, extra_len))
                 if free_container:
-                    self.c.write('      g_datalist_set_data_full (&proxy->priv->qdata, \"%s\", (gpointer) 
value, g_free);\n'
-                                 %(p.name))
-                self.c.write('      g_variant_unref (variant);\n')
-                self.c.write('    }\n')
-            self.c.write('  return value;\n')
-            self.c.write('}\n')
-            self.c.write('\n')
+                    self.outfile.write('      g_datalist_set_data_full (&proxy->priv->qdata, \"%s\", 
(gpointer) value, g_free);\n'
+                                       %(p.name))
+                self.outfile.write('      g_variant_unref (variant);\n')
+                self.outfile.write('    }\n')
+            self.outfile.write('  return value;\n')
+            self.outfile.write('}\n')
+            self.outfile.write('\n')
 
         # class boilerplate
-        self.c.write('static void\n'
-                     '%s_proxy_init (%sProxy *proxy)\n'
-                     '{\n'
-                     '#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n'
-                     '  proxy->priv = %s_proxy_get_instance_private (proxy);\n'
-                     '#else\n'
-                     '  proxy->priv = G_TYPE_INSTANCE_GET_PRIVATE (proxy, %sTYPE_%s_PROXY, 
%sProxyPrivate);\n'
-                     '#endif\n\n'
-                     '  g_dbus_proxy_set_interface_info (G_DBUS_PROXY (proxy), %s_interface_info ());\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower, i.camel_name,
-                       i.name_lower,
-                       i.ns_upper, i.name_upper, i.camel_name,
-                       i.name_lower))
-        self.c.write('static void\n'
-                     '%s_proxy_class_init (%sProxyClass *klass)\n'
-                     '{\n'
-                     '  GObjectClass *gobject_class;\n'
-                     '  GDBusProxyClass *proxy_class;\n'
-                     '\n'
-                     '  gobject_class = G_OBJECT_CLASS (klass);\n'
-                     '  gobject_class->finalize     = %s_proxy_finalize;\n'
-                     '  gobject_class->get_property = %s_proxy_get_property;\n'
-                     '  gobject_class->set_property = %s_proxy_set_property;\n'
-                     '\n'
-                     '  proxy_class = G_DBUS_PROXY_CLASS (klass);\n'
-                     '  proxy_class->g_signal = %s_proxy_g_signal;\n'
-                     '  proxy_class->g_properties_changed = %s_proxy_g_properties_changed;\n'
-                     '\n'%(i.name_lower, i.camel_name,
-                           i.name_lower, i.name_lower, i.name_lower, i.name_lower, i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_proxy_init (%sProxy *proxy)\n'
+                           '{\n'
+                           '#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n'
+                           '  proxy->priv = %s_proxy_get_instance_private (proxy);\n'
+                           '#else\n'
+                           '  proxy->priv = G_TYPE_INSTANCE_GET_PRIVATE (proxy, %sTYPE_%s_PROXY, 
%sProxyPrivate);\n'
+                           '#endif\n\n'
+                           '  g_dbus_proxy_set_interface_info (G_DBUS_PROXY (proxy), %s_interface_info 
());\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower, i.camel_name,
+                             i.name_lower,
+                             i.ns_upper, i.name_upper, i.camel_name,
+                             i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_proxy_class_init (%sProxyClass *klass)\n'
+                           '{\n'
+                           '  GObjectClass *gobject_class;\n'
+                           '  GDBusProxyClass *proxy_class;\n'
+                           '\n'
+                           '  gobject_class = G_OBJECT_CLASS (klass);\n'
+                           '  gobject_class->finalize     = %s_proxy_finalize;\n'
+                           '  gobject_class->get_property = %s_proxy_get_property;\n'
+                           '  gobject_class->set_property = %s_proxy_set_property;\n'
+                           '\n'
+                           '  proxy_class = G_DBUS_PROXY_CLASS (klass);\n'
+                           '  proxy_class->g_signal = %s_proxy_g_signal;\n'
+                           '  proxy_class->g_properties_changed = %s_proxy_g_properties_changed;\n'
+                           '\n'%(i.name_lower, i.camel_name,
+                                 i.name_lower, i.name_lower, i.name_lower, i.name_lower, i.name_lower))
         if len(i.properties) > 0:
-            self.c.write('  %s_override_properties (gobject_class, 1);\n\n'%(i.name_lower))
-        self.c.write('#if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_38\n'
-                     '  g_type_class_add_private (klass, sizeof (%sProxyPrivate));\n'
-                     '#endif\n'%(i.camel_name))
-        self.c.write('}\n'
-                     '\n')
-
-        self.c.write('static void\n'
-                     '%s_proxy_iface_init (%sIface *iface)\n'
-                     '{\n'%(i.name_lower, i.camel_name))
+            self.outfile.write('  %s_override_properties (gobject_class, 1);\n\n'%(i.name_lower))
+        self.outfile.write('#if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_38\n'
+                           '  g_type_class_add_private (klass, sizeof (%sProxyPrivate));\n'
+                           '#endif\n'%(i.camel_name))
+        self.outfile.write('}\n'
+                           '\n')
+
+        self.outfile.write('static void\n'
+                           '%s_proxy_iface_init (%sIface *iface)\n'
+                           '{\n'%(i.name_lower, i.camel_name))
         for p in i.properties:
-            self.c.write('  iface->get_%s = %s_proxy_get_%s;\n'%(p.name_lower, i.name_lower, p.name_lower))
-        self.c.write('}\n'
-                     '\n')
+            self.outfile.write('  iface->get_%s = %s_proxy_get_%s;\n'%(p.name_lower, i.name_lower, 
p.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
 
         # constructors
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s_proxy_new:\n'
                 ' * @connection: A #GDBusConnection.\n'
@@ -1910,49 +1928,49 @@ class CodeGenerator:
                 ' *\n'
                 ' * See %s_proxy_new_sync() for the synchronous, blocking version of this constructor.\n'
                 %(i.name_lower, i.name, i.name_lower, i.name_lower), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('void\n'
-                     '%s_proxy_new (\n'
-                     '    GDBusConnection     *connection,\n'
-                     '    GDBusProxyFlags      flags,\n'
-                     '    const gchar         *name,\n'
-                     '    const gchar         *object_path,\n'
-                     '    GCancellable        *cancellable,\n'
-                     '    GAsyncReadyCallback  callback,\n'
-                     '    gpointer             user_data)\n'
-                     '{\n'
-                     '  g_async_initable_new_async (%sTYPE_%s_PROXY, G_PRIORITY_DEFAULT, cancellable, 
callback, user_data, "g-flags", flags, "g-name", name, "g-connection", connection, "g-object-path", 
object_path, "g-interface-name", "%s", NULL);\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower, i.ns_upper, i.name_upper, i.name))
-        self.c.write('/**\n'
-                     ' * %s_proxy_new_finish:\n'
-                     ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%s_proxy_new().\n'
-                     ' * @error: Return location for error or %%NULL\n'
-                     ' *\n'
-                     ' * Finishes an operation started with %s_proxy_new().\n'
-                     ' *\n'
-                     ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or %%NULL if 
@error is set.\n'
-                     %(i.name_lower, i.name_lower, i.name_lower, i.camel_name))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('%s *\n'
-                     '%s_proxy_new_finish (\n'
-                     '    GAsyncResult        *res,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GObject *ret;\n'
-                     '  GObject *source_object;\n'
-                     '  source_object = g_async_result_get_source_object (res);\n'
-                     '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error);\n'
-                     '  g_object_unref (source_object);\n'
-                     '  if (ret != NULL)\n'
-                     '    return %s%s (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper))
-        self.c.write(self.docbook_gen.expand(
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('void\n'
+                           '%s_proxy_new (\n'
+                           '    GDBusConnection     *connection,\n'
+                           '    GDBusProxyFlags      flags,\n'
+                           '    const gchar         *name,\n'
+                           '    const gchar         *object_path,\n'
+                           '    GCancellable        *cancellable,\n'
+                           '    GAsyncReadyCallback  callback,\n'
+                           '    gpointer             user_data)\n'
+                           '{\n'
+                           '  g_async_initable_new_async (%sTYPE_%s_PROXY, G_PRIORITY_DEFAULT, cancellable, 
callback, user_data, "g-flags", flags, "g-name", name, "g-connection", connection, "g-object-path", 
object_path, "g-interface-name", "%s", NULL);\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower, i.ns_upper, i.name_upper, i.name))
+        self.outfile.write('/**\n'
+                           ' * %s_proxy_new_finish:\n'
+                           ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%s_proxy_new().\n'
+                           ' * @error: Return location for error or %%NULL\n'
+                           ' *\n'
+                           ' * Finishes an operation started with %s_proxy_new().\n'
+                           ' *\n'
+                           ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or 
%%NULL if @error is set.\n'
+                           %(i.name_lower, i.name_lower, i.name_lower, i.camel_name))
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('%s *\n'
+                           '%s_proxy_new_finish (\n'
+                           '    GAsyncResult        *res,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GObject *ret;\n'
+                           '  GObject *source_object;\n'
+                           '  source_object = g_async_result_get_source_object (res);\n'
+                           '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, 
error);\n'
+                           '  g_object_unref (source_object);\n'
+                           '  if (ret != NULL)\n'
+                           '    return %s%s (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper))
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s_proxy_new_sync:\n'
                 ' * @connection: A #GDBusConnection.\n'
@@ -1970,27 +1988,27 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or %%NULL if 
@error is set.\n'
                 %(i.name_lower, i.name, i.name_lower, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('%s *\n'
-                     '%s_proxy_new_sync (\n'
-                     '    GDBusConnection     *connection,\n'
-                     '    GDBusProxyFlags      flags,\n'
-                     '    const gchar         *name,\n'
-                     '    const gchar         *object_path,\n'
-                     '    GCancellable        *cancellable,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GInitable *ret;\n'
-                     '  ret = g_initable_new (%sTYPE_%s_PROXY, cancellable, error, "g-flags", flags, 
"g-name", name, "g-connection", connection, "g-object-path", object_path, "g-interface-name", "%s", NULL);\n'
-                     '  if (ret != NULL)\n'
-                     '    return %s%s (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.name, i.ns_upper, 
i.name_upper))
-        self.c.write('\n')
-        self.c.write(self.docbook_gen.expand(
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('%s *\n'
+                           '%s_proxy_new_sync (\n'
+                           '    GDBusConnection     *connection,\n'
+                           '    GDBusProxyFlags      flags,\n'
+                           '    const gchar         *name,\n'
+                           '    const gchar         *object_path,\n'
+                           '    GCancellable        *cancellable,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GInitable *ret;\n'
+                           '  ret = g_initable_new (%sTYPE_%s_PROXY, cancellable, error, "g-flags", flags, 
"g-name", name, "g-connection", connection, "g-object-path", object_path, "g-interface-name", "%s", NULL);\n'
+                           '  if (ret != NULL)\n'
+                           '    return %s%s (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.name, i.ns_upper, 
i.name_upper))
+        self.outfile.write('\n')
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s_proxy_new_for_bus:\n'
                 ' * @bus_type: A #GBusType.\n'
@@ -2008,49 +2026,49 @@ class CodeGenerator:
                 ' *\n'
                 ' * See %s_proxy_new_for_bus_sync() for the synchronous, blocking version of this 
constructor.\n'
                 %(i.name_lower, i.name_lower, i.name_lower, i.name_lower), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('void\n'
-                     '%s_proxy_new_for_bus (\n'
-                     '    GBusType             bus_type,\n'
-                     '    GDBusProxyFlags      flags,\n'
-                     '    const gchar         *name,\n'
-                     '    const gchar         *object_path,\n'
-                     '    GCancellable        *cancellable,\n'
-                     '    GAsyncReadyCallback  callback,\n'
-                     '    gpointer             user_data)\n'
-                     '{\n'
-                     '  g_async_initable_new_async (%sTYPE_%s_PROXY, G_PRIORITY_DEFAULT, cancellable, 
callback, user_data, "g-flags", flags, "g-name", name, "g-bus-type", bus_type, "g-object-path", object_path, 
"g-interface-name", "%s", NULL);\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower, i.ns_upper, i.name_upper, i.name))
-        self.c.write('/**\n'
-                     ' * %s_proxy_new_for_bus_finish:\n'
-                     ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%s_proxy_new_for_bus().\n'
-                     ' * @error: Return location for error or %%NULL\n'
-                     ' *\n'
-                     ' * Finishes an operation started with %s_proxy_new_for_bus().\n'
-                     ' *\n'
-                     ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or %%NULL if 
@error is set.\n'
-                     %(i.name_lower, i.name_lower, i.name_lower, i.camel_name))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('%s *\n'
-                     '%s_proxy_new_for_bus_finish (\n'
-                     '    GAsyncResult        *res,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GObject *ret;\n'
-                     '  GObject *source_object;\n'
-                     '  source_object = g_async_result_get_source_object (res);\n'
-                     '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error);\n'
-                     '  g_object_unref (source_object);\n'
-                     '  if (ret != NULL)\n'
-                     '    return %s%s (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper))
-        self.c.write(self.docbook_gen.expand(
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('void\n'
+                           '%s_proxy_new_for_bus (\n'
+                           '    GBusType             bus_type,\n'
+                           '    GDBusProxyFlags      flags,\n'
+                           '    const gchar         *name,\n'
+                           '    const gchar         *object_path,\n'
+                           '    GCancellable        *cancellable,\n'
+                           '    GAsyncReadyCallback  callback,\n'
+                           '    gpointer             user_data)\n'
+                           '{\n'
+                           '  g_async_initable_new_async (%sTYPE_%s_PROXY, G_PRIORITY_DEFAULT, cancellable, 
callback, user_data, "g-flags", flags, "g-name", name, "g-bus-type", bus_type, "g-object-path", object_path, 
"g-interface-name", "%s", NULL);\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower, i.ns_upper, i.name_upper, i.name))
+        self.outfile.write('/**\n'
+                           ' * %s_proxy_new_for_bus_finish:\n'
+                           ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%s_proxy_new_for_bus().\n'
+                           ' * @error: Return location for error or %%NULL\n'
+                           ' *\n'
+                           ' * Finishes an operation started with %s_proxy_new_for_bus().\n'
+                           ' *\n'
+                           ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or 
%%NULL if @error is set.\n'
+                           %(i.name_lower, i.name_lower, i.name_lower, i.camel_name))
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('%s *\n'
+                           '%s_proxy_new_for_bus_finish (\n'
+                           '    GAsyncResult        *res,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GObject *ret;\n'
+                           '  GObject *source_object;\n'
+                           '  source_object = g_async_result_get_source_object (res);\n'
+                           '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, 
error);\n'
+                           '  g_object_unref (source_object);\n'
+                           '  if (ret != NULL)\n'
+                           '    return %s%s (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper))
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s_proxy_new_for_bus_sync:\n'
                 ' * @bus_type: A #GBusType.\n'
@@ -2068,379 +2086,377 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: (transfer full) (type %sProxy): The constructed proxy object or %%NULL if 
@error is set.\n'
                 %(i.name_lower, i.name_lower, i.name_lower, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('%s *\n'
-                     '%s_proxy_new_for_bus_sync (\n'
-                     '    GBusType             bus_type,\n'
-                     '    GDBusProxyFlags      flags,\n'
-                     '    const gchar         *name,\n'
-                     '    const gchar         *object_path,\n'
-                     '    GCancellable        *cancellable,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GInitable *ret;\n'
-                     '  ret = g_initable_new (%sTYPE_%s_PROXY, cancellable, error, "g-flags", flags, 
"g-name", name, "g-bus-type", bus_type, "g-object-path", object_path, "g-interface-name", "%s", NULL);\n'
-                     '  if (ret != NULL)\n'
-                     '    return %s%s (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.name, i.ns_upper, 
i.name_upper))
-        self.c.write('\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('%s *\n'
+                           '%s_proxy_new_for_bus_sync (\n'
+                           '    GBusType             bus_type,\n'
+                           '    GDBusProxyFlags      flags,\n'
+                           '    const gchar         *name,\n'
+                           '    const gchar         *object_path,\n'
+                           '    GCancellable        *cancellable,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GInitable *ret;\n'
+                           '  ret = g_initable_new (%sTYPE_%s_PROXY, cancellable, error, "g-flags", flags, 
"g-name", name, "g-bus-type", bus_type, "g-object-path", object_path, "g-interface-name", "%s", NULL);\n'
+                           '  if (ret != NULL)\n'
+                           '    return %s%s (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.name, i.ns_upper, 
i.name_upper))
+        self.outfile.write('\n')
 
     # ---------------------------------------------------------------------------------------------------
 
     def generate_skeleton(self, i):
         # class boilerplate
-        self.c.write('/* ------------------------------------------------------------------------ */\n'
-                     '\n')
+        self.outfile.write('/* ------------------------------------------------------------------------ */\n'
+                           '\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sSkeleton:\n'
                 ' *\n'
                 ' * The #%sSkeleton structure contains only private data and should only be accessed using 
the provided API.\n'
                 %(i.camel_name, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sSkeletonClass:\n'
                 ' * @parent_class: The parent class.\n'
                 ' *\n'
                 ' * Class structure for #%sSkeleton.\n'
                 %(i.camel_name, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('\n')
-
-        self.c.write('struct _%sSkeletonPrivate\n'
-                     '{\n'
-                     '  GValue *properties;\n'
-                     '  GList *changed_properties;\n'
-                     '  GSource *changed_properties_idle_source;\n'
-                     '  GMainContext *context;\n'
-                     '  GMutex lock;\n'
-                     '};\n'
-                     '\n'%i.camel_name)
-
-        self.c.write('static void\n'
-                     '_%s_skeleton_handle_method_call (\n'
-                     '  GDBusConnection *connection G_GNUC_UNUSED,\n'
-                     '  const gchar *sender G_GNUC_UNUSED,\n'
-                     '  const gchar *object_path G_GNUC_UNUSED,\n'
-                     '  const gchar *interface_name,\n'
-                     '  const gchar *method_name,\n'
-                     '  GVariant *parameters,\n'
-                     '  GDBusMethodInvocation *invocation,\n'
-                     '  gpointer user_data)\n'
-                     '{\n'
-                     '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
-                     '  _ExtendedGDBusMethodInfo *info;\n'
-                     '  GVariantIter iter;\n'
-                     '  GVariant *child;\n'
-                     '  GValue *paramv;\n'
-                     '  gsize num_params;\n'
-                     '  guint num_extra;\n'
-                     '  gsize n;\n'
-                     '  guint signal_id;\n'
-                     '  GValue return_value = G_VALUE_INIT;\n'
-                     %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
-        self.c.write('  info = (_ExtendedGDBusMethodInfo *) g_dbus_method_invocation_get_method_info 
(invocation);\n'
-                     '  g_assert (info != NULL);\n'
-                     %())
-        self.c.write ('  num_params = g_variant_n_children (parameters);\n'
-                      '  num_extra = info->pass_fdlist ? 3 : 2;'
-                      '  paramv = g_new0 (GValue, num_params + num_extra);\n'
-                      '  n = 0;\n'
-                      '  g_value_init (&paramv[n], %sTYPE_%s);\n'
-                      '  g_value_set_object (&paramv[n++], skeleton);\n'
-                      '  g_value_init (&paramv[n], G_TYPE_DBUS_METHOD_INVOCATION);\n'
-                      '  g_value_set_object (&paramv[n++], invocation);\n'
-                      '  if (info->pass_fdlist)\n'
-                      '    {\n'
-                      '#ifdef G_OS_UNIX\n'
-                      '      g_value_init (&paramv[n], G_TYPE_UNIX_FD_LIST);\n'
-                      '      g_value_set_object (&paramv[n++], g_dbus_message_get_unix_fd_list 
(g_dbus_method_invocation_get_message (invocation)));\n'
-                      '#else\n'
-                      '      g_assert_not_reached ();\n'
-                      '#endif\n'
-                      '    }\n'
-                      %(i.ns_upper, i.name_upper))
-        self.c.write('  g_variant_iter_init (&iter, parameters);\n'
-                     '  while ((child = g_variant_iter_next_value (&iter)) != NULL)\n'
-                     '    {\n'
-                     '      _ExtendedGDBusArgInfo *arg_info = (_ExtendedGDBusArgInfo *) 
info->parent_struct.in_args[n - num_extra];\n'
-                     '      if (arg_info->use_gvariant)\n'
-                     '        {\n'
-                     '          g_value_init (&paramv[n], G_TYPE_VARIANT);\n'
-                     '          g_value_set_variant (&paramv[n], child);\n'
-                     '          n++;\n'
-                     '        }\n'
-                     '      else\n'
-                     '        g_dbus_gvariant_to_gvalue (child, &paramv[n++]);\n'
-                     '      g_variant_unref (child);\n'
-                     '    }\n'
-                     )
-        self.c.write('  signal_id = g_signal_lookup (info->signal_name, %sTYPE_%s);\n'
-                     %(i.ns_upper, i.name_upper))
-        self.c.write('  g_value_init (&return_value, G_TYPE_BOOLEAN);\n'
-                     '  g_signal_emitv (paramv, signal_id, 0, &return_value);\n'
-                     '  if (!g_value_get_boolean (&return_value))\n'
-                     '    g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, 
G_DBUS_ERROR_UNKNOWN_METHOD, "Method %s is not implemented on interface %s", method_name, interface_name);\n'
-                     '  g_value_unset (&return_value);\n'
-                     )
-        self.c.write('  for (n = 0; n < num_params + num_extra; n++)\n'
-                     '    g_value_unset (&paramv[n]);\n'
-                     '  g_free (paramv);\n')
-        self.c.write('}\n'
-                     '\n')
-
-        self.c.write('static GVariant *\n'
-                     '_%s_skeleton_handle_get_property (\n'
-                     '  GDBusConnection *connection G_GNUC_UNUSED,\n'
-                     '  const gchar *sender G_GNUC_UNUSED,\n'
-                     '  const gchar *object_path G_GNUC_UNUSED,\n'
-                     '  const gchar *interface_name G_GNUC_UNUSED,\n'
-                     '  const gchar *property_name,\n'
-                     '  GError **error,\n'
-                     '  gpointer user_data)\n'
-                     '{\n'
-                     '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
-                     '  GValue value = G_VALUE_INIT;\n'
-                     '  GParamSpec *pspec;\n'
-                     '  _ExtendedGDBusPropertyInfo *info;\n'
-                     '  GVariant *ret;\n'
-                     %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
-        self.c.write('  ret = NULL;\n'
-                     '  info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, property_name);\n'
-                     '  g_assert (info != NULL);\n'
-                     '  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (skeleton), 
info->hyphen_name);\n'
-                     '  if (pspec == NULL)\n'
-                     '    {\n'
-                     '      g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS, "No property with 
name %%s", property_name);\n'
-                     '    }\n'
-                     '  else\n'
-                     '    {\n'
-                     '      g_value_init (&value, pspec->value_type);\n'
-                     '      g_object_get_property (G_OBJECT (skeleton), info->hyphen_name, &value);\n'
-                     '      ret = g_dbus_gvalue_to_gvariant (&value, G_VARIANT_TYPE 
(info->parent_struct.signature));\n'
-                     '      g_value_unset (&value);\n'
-                     '    }\n'
-                     '  return ret;\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower))
-
-        self.c.write('static gboolean\n'
-                     '_%s_skeleton_handle_set_property (\n'
-                     '  GDBusConnection *connection G_GNUC_UNUSED,\n'
-                     '  const gchar *sender G_GNUC_UNUSED,\n'
-                     '  const gchar *object_path G_GNUC_UNUSED,\n'
-                     '  const gchar *interface_name G_GNUC_UNUSED,\n'
-                     '  const gchar *property_name,\n'
-                     '  GVariant *variant,\n'
-                     '  GError **error,\n'
-                     '  gpointer user_data)\n'
-                     '{\n'
-                     '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
-                     '  GValue value = G_VALUE_INIT;\n'
-                     '  GParamSpec *pspec;\n'
-                     '  _ExtendedGDBusPropertyInfo *info;\n'
-                     '  gboolean ret;\n'
-                     %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
-        self.c.write('  ret = FALSE;\n'
-                     '  info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, property_name);\n'
-                     '  g_assert (info != NULL);\n'
-                     '  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (skeleton), 
info->hyphen_name);\n'
-                     '  if (pspec == NULL)\n'
-                     '    {\n'
-                     '      g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS, "No property with 
name %%s", property_name);\n'
-                     '    }\n'
-                     '  else\n'
-                     '    {\n'
-                     '      if (info->use_gvariant)\n'
-                     '        g_value_set_variant (&value, variant);\n'
-                     '      else\n'
-                     '        g_dbus_gvariant_to_gvalue (variant, &value);\n'
-                     '      g_object_set_property (G_OBJECT (skeleton), info->hyphen_name, &value);\n'
-                     '      g_value_unset (&value);\n'
-                     '      ret = TRUE;\n'
-                     '    }\n'
-                     '  return ret;\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower))
-
-
-        self.c.write('static const GDBusInterfaceVTable _%s_skeleton_vtable =\n'
-                     '{\n'
-                     '  _%s_skeleton_handle_method_call,\n'
-                     '  _%s_skeleton_handle_get_property,\n'
-                     '  _%s_skeleton_handle_set_property,\n'
-                     '  {NULL}\n'
-                     '};\n'
-                     '\n'%(i.name_lower, i.name_lower, i.name_lower, i.name_lower))
-
-        self.c.write('static GDBusInterfaceInfo *\n'
-                     '%s_skeleton_dbus_interface_get_info (GDBusInterfaceSkeleton *skeleton G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '  return %s_interface_info ();\n'
-                     %(i.name_lower, i.name_lower))
-        self.c.write('}\n'
-                     '\n')
-
-        self.c.write('static GDBusInterfaceVTable *\n'
-                     '%s_skeleton_dbus_interface_get_vtable (GDBusInterfaceSkeleton *skeleton 
G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '  return (GDBusInterfaceVTable *) &_%s_skeleton_vtable;\n'
-                     %(i.name_lower, i.name_lower))
-        self.c.write('}\n'
-                     '\n')
-
-        self.c.write('static GVariant *\n'
-                     '%s_skeleton_dbus_interface_get_properties (GDBusInterfaceSkeleton *_skeleton)\n'
-                     '{\n'
-                     '  %sSkeleton *skeleton = %s%s_SKELETON (_skeleton);\n'
-                     %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
-        self.c.write('\n'
-                     '  GVariantBuilder builder;\n'
-                     '  guint n;\n'
-                     '  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}"));\n'
-                     '  if (_%s_interface_info.parent_struct.properties == NULL)\n'
-                     '    goto out;\n'
-                     '  for (n = 0; _%s_interface_info.parent_struct.properties[n] != NULL; n++)\n'
-                     '    {\n'
-                     '      GDBusPropertyInfo *info = _%s_interface_info.parent_struct.properties[n];\n'
-                     '      if (info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE)\n'
-                     '        {\n'
-                     '          GVariant *value;\n'
-                     '          value = _%s_skeleton_handle_get_property 
(g_dbus_interface_skeleton_get_connection (G_DBUS_INTERFACE_SKELETON (skeleton)), NULL, 
g_dbus_interface_skeleton_get_object_path (G_DBUS_INTERFACE_SKELETON (skeleton)), "%s", info->name, NULL, 
skeleton);\n'
-                     '          if (value != NULL)\n'
-                     '            {\n'
-                     '              g_variant_take_ref (value);\n'
-                     '              g_variant_builder_add (&builder, "{sv}", info->name, value);\n'
-                     '              g_variant_unref (value);\n'
-                     '            }\n'
-                     '        }\n'
-                     '    }\n'
-                     'out:\n'
-                     '  return g_variant_builder_end (&builder);\n'
-                     '}\n'
-                     '\n'
-                     %(i.name_lower, i.name_lower, i.name_lower, i.name_lower, i.name))
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('\n')
+
+        self.outfile.write('struct _%sSkeletonPrivate\n'
+                           '{\n'
+                           '  GValue *properties;\n'
+                           '  GList *changed_properties;\n'
+                           '  GSource *changed_properties_idle_source;\n'
+                           '  GMainContext *context;\n'
+                           '  GMutex lock;\n'
+                           '};\n'
+                           '\n'%i.camel_name)
+
+        self.outfile.write('static void\n'
+                           '_%s_skeleton_handle_method_call (\n'
+                           '  GDBusConnection *connection G_GNUC_UNUSED,\n'
+                           '  const gchar *sender G_GNUC_UNUSED,\n'
+                           '  const gchar *object_path G_GNUC_UNUSED,\n'
+                           '  const gchar *interface_name,\n'
+                           '  const gchar *method_name,\n'
+                           '  GVariant *parameters,\n'
+                           '  GDBusMethodInvocation *invocation,\n'
+                           '  gpointer user_data)\n'
+                           '{\n'
+                           '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
+                           '  _ExtendedGDBusMethodInfo *info;\n'
+                           '  GVariantIter iter;\n'
+                           '  GVariant *child;\n'
+                           '  GValue *paramv;\n'
+                           '  gsize num_params;\n'
+                           '  guint num_extra;\n'
+                           '  gsize n;\n'
+                           '  guint signal_id;\n'
+                           '  GValue return_value = G_VALUE_INIT;\n'
+                           %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
+        self.outfile.write('  info = (_ExtendedGDBusMethodInfo *) g_dbus_method_invocation_get_method_info 
(invocation);\n'
+                           '  g_assert (info != NULL);\n'
+                           %())
+        self.outfile.write('  num_params = g_variant_n_children (parameters);\n'
+                           '  num_extra = info->pass_fdlist ? 3 : 2;'
+                           '  paramv = g_new0 (GValue, num_params + num_extra);\n'
+                           '  n = 0;\n'
+                           '  g_value_init (&paramv[n], %sTYPE_%s);\n'
+                           '  g_value_set_object (&paramv[n++], skeleton);\n'
+                           '  g_value_init (&paramv[n], G_TYPE_DBUS_METHOD_INVOCATION);\n'
+                           '  g_value_set_object (&paramv[n++], invocation);\n'
+                           '  if (info->pass_fdlist)\n'
+                           '    {\n'
+                           '#ifdef G_OS_UNIX\n'
+                           '      g_value_init (&paramv[n], G_TYPE_UNIX_FD_LIST);\n'
+                           '      g_value_set_object (&paramv[n++], g_dbus_message_get_unix_fd_list 
(g_dbus_method_invocation_get_message (invocation)));\n'
+                           '#else\n'
+                           '      g_assert_not_reached ();\n'
+                           '#endif\n'
+                           '    }\n'
+                           %(i.ns_upper, i.name_upper))
+        self.outfile.write('  g_variant_iter_init (&iter, parameters);\n'
+                           '  while ((child = g_variant_iter_next_value (&iter)) != NULL)\n'
+                           '    {\n'
+                           '      _ExtendedGDBusArgInfo *arg_info = (_ExtendedGDBusArgInfo *) 
info->parent_struct.in_args[n - num_extra];\n'
+                           '      if (arg_info->use_gvariant)\n'
+                           '        {\n'
+                           '          g_value_init (&paramv[n], G_TYPE_VARIANT);\n'
+                           '          g_value_set_variant (&paramv[n], child);\n'
+                           '          n++;\n'
+                           '        }\n'
+                           '      else\n'
+                           '        g_dbus_gvariant_to_gvalue (child, &paramv[n++]);\n'
+                           '      g_variant_unref (child);\n'
+                           '    }\n')
+        self.outfile.write('  signal_id = g_signal_lookup (info->signal_name, %sTYPE_%s);\n'
+                           %(i.ns_upper, i.name_upper))
+        self.outfile.write('  g_value_init (&return_value, G_TYPE_BOOLEAN);\n'
+                           '  g_signal_emitv (paramv, signal_id, 0, &return_value);\n'
+                           '  if (!g_value_get_boolean (&return_value))\n'
+                           '    g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, 
G_DBUS_ERROR_UNKNOWN_METHOD, "Method %s is not implemented on interface %s", method_name, interface_name);\n'
+                           '  g_value_unset (&return_value);\n')
+        self.outfile.write('  for (n = 0; n < num_params + num_extra; n++)\n'
+                           '    g_value_unset (&paramv[n]);\n'
+                           '  g_free (paramv);\n')
+        self.outfile.write('}\n'
+                           '\n')
+
+        self.outfile.write('static GVariant *\n'
+                           '_%s_skeleton_handle_get_property (\n'
+                           '  GDBusConnection *connection G_GNUC_UNUSED,\n'
+                           '  const gchar *sender G_GNUC_UNUSED,\n'
+                           '  const gchar *object_path G_GNUC_UNUSED,\n'
+                           '  const gchar *interface_name G_GNUC_UNUSED,\n'
+                           '  const gchar *property_name,\n'
+                           '  GError **error,\n'
+                           '  gpointer user_data)\n'
+                           '{\n'
+                           '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
+                           '  GValue value = G_VALUE_INIT;\n'
+                           '  GParamSpec *pspec;\n'
+                           '  _ExtendedGDBusPropertyInfo *info;\n'
+                           '  GVariant *ret;\n'
+                           %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
+        self.outfile.write('  ret = NULL;\n'
+                           '  info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, property_name);\n'
+                           '  g_assert (info != NULL);\n'
+                           '  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (skeleton), 
info->hyphen_name);\n'
+                           '  if (pspec == NULL)\n'
+                           '    {\n'
+                           '      g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS, "No property 
with name %%s", property_name);\n'
+                           '    }\n'
+                           '  else\n'
+                           '    {\n'
+                           '      g_value_init (&value, pspec->value_type);\n'
+                           '      g_object_get_property (G_OBJECT (skeleton), info->hyphen_name, &value);\n'
+                           '      ret = g_dbus_gvalue_to_gvariant (&value, G_VARIANT_TYPE 
(info->parent_struct.signature));\n'
+                           '      g_value_unset (&value);\n'
+                           '    }\n'
+                           '  return ret;\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower))
+
+        self.outfile.write('static gboolean\n'
+                           '_%s_skeleton_handle_set_property (\n'
+                           '  GDBusConnection *connection G_GNUC_UNUSED,\n'
+                           '  const gchar *sender G_GNUC_UNUSED,\n'
+                           '  const gchar *object_path G_GNUC_UNUSED,\n'
+                           '  const gchar *interface_name G_GNUC_UNUSED,\n'
+                           '  const gchar *property_name,\n'
+                           '  GVariant *variant,\n'
+                           '  GError **error,\n'
+                           '  gpointer user_data)\n'
+                           '{\n'
+                           '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
+                           '  GValue value = G_VALUE_INIT;\n'
+                           '  GParamSpec *pspec;\n'
+                           '  _ExtendedGDBusPropertyInfo *info;\n'
+                           '  gboolean ret;\n'
+                           %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
+        self.outfile.write('  ret = FALSE;\n'
+                           '  info = (_ExtendedGDBusPropertyInfo *) g_dbus_interface_info_lookup_property 
((GDBusInterfaceInfo *) &_%s_interface_info.parent_struct, property_name);\n'
+                           '  g_assert (info != NULL);\n'
+                           '  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (skeleton), 
info->hyphen_name);\n'
+                           '  if (pspec == NULL)\n'
+                           '    {\n'
+                           '      g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS, "No property 
with name %%s", property_name);\n'
+                           '    }\n'
+                           '  else\n'
+                           '    {\n'
+                           '      if (info->use_gvariant)\n'
+                           '        g_value_set_variant (&value, variant);\n'
+                           '      else\n'
+                           '        g_dbus_gvariant_to_gvalue (variant, &value);\n'
+                           '      g_object_set_property (G_OBJECT (skeleton), info->hyphen_name, &value);\n'
+                           '      g_value_unset (&value);\n'
+                           '      ret = TRUE;\n'
+                           '    }\n'
+                           '  return ret;\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower))
+
+
+        self.outfile.write('static const GDBusInterfaceVTable _%s_skeleton_vtable =\n'
+                           '{\n'
+                           '  _%s_skeleton_handle_method_call,\n'
+                           '  _%s_skeleton_handle_get_property,\n'
+                           '  _%s_skeleton_handle_set_property,\n'
+                           '  {NULL}\n'
+                           '};\n'
+                           '\n'%(i.name_lower, i.name_lower, i.name_lower, i.name_lower))
+
+        self.outfile.write('static GDBusInterfaceInfo *\n'
+                           '%s_skeleton_dbus_interface_get_info (GDBusInterfaceSkeleton *skeleton 
G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '  return %s_interface_info ();\n'
+                           %(i.name_lower, i.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
+
+        self.outfile.write('static GDBusInterfaceVTable *\n'
+                           '%s_skeleton_dbus_interface_get_vtable (GDBusInterfaceSkeleton *skeleton 
G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '  return (GDBusInterfaceVTable *) &_%s_skeleton_vtable;\n'
+                           %(i.name_lower, i.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
+
+        self.outfile.write('static GVariant *\n'
+                           '%s_skeleton_dbus_interface_get_properties (GDBusInterfaceSkeleton *_skeleton)\n'
+                           '{\n'
+                           '  %sSkeleton *skeleton = %s%s_SKELETON (_skeleton);\n'
+                           %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
+        self.outfile.write('\n'
+                           '  GVariantBuilder builder;\n'
+                           '  guint n;\n'
+                           '  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}"));\n'
+                           '  if (_%s_interface_info.parent_struct.properties == NULL)\n'
+                           '    goto out;\n'
+                           '  for (n = 0; _%s_interface_info.parent_struct.properties[n] != NULL; n++)\n'
+                           '    {\n'
+                           '      GDBusPropertyInfo *info = 
_%s_interface_info.parent_struct.properties[n];\n'
+                           '      if (info->flags & G_DBUS_PROPERTY_INFO_FLAGS_READABLE)\n'
+                           '        {\n'
+                           '          GVariant *value;\n'
+                           '          value = _%s_skeleton_handle_get_property 
(g_dbus_interface_skeleton_get_connection (G_DBUS_INTERFACE_SKELETON (skeleton)), NULL, 
g_dbus_interface_skeleton_get_object_path (G_DBUS_INTERFACE_SKELETON (skeleton)), "%s", info->name, NULL, 
skeleton);\n'
+                           '          if (value != NULL)\n'
+                           '            {\n'
+                           '              g_variant_take_ref (value);\n'
+                           '              g_variant_builder_add (&builder, "{sv}", info->name, value);\n'
+                           '              g_variant_unref (value);\n'
+                           '            }\n'
+                           '        }\n'
+                           '    }\n'
+                           'out:\n'
+                           '  return g_variant_builder_end (&builder);\n'
+                           '}\n'
+                           '\n'
+                           %(i.name_lower, i.name_lower, i.name_lower, i.name_lower, i.name))
 
         if len(i.properties) > 0:
-            self.c.write('static gboolean _%s_emit_changed (gpointer user_data);\n'
-                         '\n'
-                         %(i.name_lower))
-
-        self.c.write('static void\n'
-                     '%s_skeleton_dbus_interface_flush (GDBusInterfaceSkeleton *_skeleton)\n'
-                     '{\n'
-                     %(i.name_lower))
+            self.outfile.write('static gboolean _%s_emit_changed (gpointer user_data);\n'
+                               '\n'
+                               %(i.name_lower))
+
+        self.outfile.write('static void\n'
+                           '%s_skeleton_dbus_interface_flush (GDBusInterfaceSkeleton *_skeleton)\n'
+                           '{\n'
+                           %(i.name_lower))
         if len(i.properties) > 0:
-            self.c.write('  %sSkeleton *skeleton = %s%s_SKELETON (_skeleton);\n'
-                         '  gboolean emit_changed = FALSE;\n'
-                         '\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  if (skeleton->priv->changed_properties_idle_source != NULL)\n'
-                         '    {\n'
-                         '      g_source_destroy (skeleton->priv->changed_properties_idle_source);\n'
-                         '      skeleton->priv->changed_properties_idle_source = NULL;\n'
-                         '      emit_changed = TRUE;\n'
-                         '    }\n'
-                         '  g_mutex_unlock (&skeleton->priv->lock);\n'
-                         '\n'
-                         '  if (emit_changed)\n'
-                         '    _%s_emit_changed (skeleton);\n'
-                         %(i.camel_name, i.ns_upper, i.name_upper, i.name_lower))
-        self.c.write('}\n'
-                     '\n')
+            self.outfile.write('  %sSkeleton *skeleton = %s%s_SKELETON (_skeleton);\n'
+                               '  gboolean emit_changed = FALSE;\n'
+                               '\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  if (skeleton->priv->changed_properties_idle_source != NULL)\n'
+                               '    {\n'
+                               '      g_source_destroy (skeleton->priv->changed_properties_idle_source);\n'
+                               '      skeleton->priv->changed_properties_idle_source = NULL;\n'
+                               '      emit_changed = TRUE;\n'
+                               '    }\n'
+                               '  g_mutex_unlock (&skeleton->priv->lock);\n'
+                               '\n'
+                               '  if (emit_changed)\n'
+                               '    _%s_emit_changed (skeleton);\n'
+                               %(i.camel_name, i.ns_upper, i.name_upper, i.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
 
         for s in i.signals:
-            self.c.write('static void\n'
-                         '_%s_on_signal_%s (\n'
-                         '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
+            self.outfile.write('static void\n'
+                               '_%s_on_signal_%s (\n'
+                               '    %s *object'%(i.name_lower, s.name_lower, i.camel_name))
             for a in s.args:
-                self.c.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
-            self.c.write(')\n'
-                         '{\n'
-                         '  %sSkeleton *skeleton = %s%s_SKELETON (object);\n\n'
-                         '  GList      *connections, *l;\n'
-                         '  GVariant   *signal_variant;\n'
-                         '  connections = g_dbus_interface_skeleton_get_connections 
(G_DBUS_INTERFACE_SKELETON (skeleton));\n'
-                         %(i.camel_name, i.ns_upper, i.name_upper))
-            self.c.write('\n'
-                         '  signal_variant = g_variant_ref_sink (g_variant_new ("(')
+                self.outfile.write(',\n    %sarg_%s'%(a.ctype_in, a.name))
+            self.outfile.write(')\n'
+                               '{\n'
+                               '  %sSkeleton *skeleton = %s%s_SKELETON (object);\n\n'
+                               '  GList      *connections, *l;\n'
+                               '  GVariant   *signal_variant;\n'
+                               '  connections = g_dbus_interface_skeleton_get_connections 
(G_DBUS_INTERFACE_SKELETON (skeleton));\n'
+                               %(i.camel_name, i.ns_upper, i.name_upper))
+            self.outfile.write('\n'
+                               '  signal_variant = g_variant_ref_sink (g_variant_new ("(')
             for a in s.args:
-                self.c.write('%s'%(a.format_in))
-            self.c.write(')"')
+                self.outfile.write('%s'%(a.format_in))
+            self.outfile.write(')"')
             for a in s.args:
-                self.c.write(',\n                   arg_%s'%(a.name))
-            self.c.write('));\n')
-
-            self.c.write('  for (l = connections; l != NULL; l = l->next)\n'
-                         '    {\n'
-                         '      GDBusConnection *connection = l->data;\n'
-                         '      g_dbus_connection_emit_signal (connection,\n'
-                         '        NULL, g_dbus_interface_skeleton_get_object_path (G_DBUS_INTERFACE_SKELETON 
(skeleton)), "%s", "%s",\n'
-                         '        signal_variant, NULL);\n'
-                         '    }\n'
-                         %(i.name, s.name))
-            self.c.write('  g_variant_unref (signal_variant);\n')
-            self.c.write('  g_list_free_full (connections, g_object_unref);\n')
-            self.c.write('}\n'
-                         '\n')
-
-        self.c.write('static void %s_skeleton_iface_init (%sIface *iface);\n'
-                     %(i.name_lower, i.camel_name))
-
-        self.c.write('#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n')
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sSkeleton, %s_skeleton, 
G_TYPE_DBUS_INTERFACE_SKELETON,\n'%(i.camel_name, i.name_lower))
-        self.c.write('                         G_ADD_PRIVATE (%sSkeleton)\n'%(i.camel_name))
-        self.c.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_skeleton_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
-        self.c.write('#else\n')
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sSkeleton, %s_skeleton, 
G_TYPE_DBUS_INTERFACE_SKELETON,\n'%(i.camel_name, i.name_lower))
-        self.c.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_skeleton_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
-        self.c.write('#endif\n')
+                self.outfile.write(',\n                   arg_%s'%(a.name))
+            self.outfile.write('));\n')
+
+            self.outfile.write('  for (l = connections; l != NULL; l = l->next)\n'
+                               '    {\n'
+                               '      GDBusConnection *connection = l->data;\n'
+                               '      g_dbus_connection_emit_signal (connection,\n'
+                               '        NULL, g_dbus_interface_skeleton_get_object_path 
(G_DBUS_INTERFACE_SKELETON (skeleton)), "%s", "%s",\n'
+                               '        signal_variant, NULL);\n'
+                               '    }\n'
+                               %(i.name, s.name))
+            self.outfile.write('  g_variant_unref (signal_variant);\n')
+            self.outfile.write('  g_list_free_full (connections, g_object_unref);\n')
+            self.outfile.write('}\n'
+                               '\n')
+
+        self.outfile.write('static void %s_skeleton_iface_init (%sIface *iface);\n'
+                           %(i.name_lower, i.camel_name))
+
+        self.outfile.write('#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n')
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sSkeleton, %s_skeleton, 
G_TYPE_DBUS_INTERFACE_SKELETON,\n'%(i.camel_name, i.name_lower))
+        self.outfile.write('                         G_ADD_PRIVATE (%sSkeleton)\n'%(i.camel_name))
+        self.outfile.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_skeleton_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
+        self.outfile.write('#else\n')
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sSkeleton, %s_skeleton, 
G_TYPE_DBUS_INTERFACE_SKELETON,\n'%(i.camel_name, i.name_lower))
+        self.outfile.write('                         G_IMPLEMENT_INTERFACE (%sTYPE_%s, 
%s_skeleton_iface_init))\n\n'%(i.ns_upper, i.name_upper, i.name_lower))
+        self.outfile.write('#endif\n')
 
         # finalize
-        self.c.write('static void\n'
-                     '%s_skeleton_finalize (GObject *object)\n'
-                     '{\n'%(i.name_lower))
-        self.c.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'%(i.camel_name, i.ns_upper, 
i.name_upper))
+        self.outfile.write('static void\n'
+                           '%s_skeleton_finalize (GObject *object)\n'
+                           '{\n'%(i.name_lower))
+        self.outfile.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'%(i.camel_name, i.ns_upper, 
i.name_upper))
         if len(i.properties) > 0:
-            self.c.write('  guint n;\n'
-                         '  for (n = 0; n < %d; n++)\n'
-                         '    g_value_unset (&skeleton->priv->properties[n]);\n'%(len(i.properties)))
-            self.c.write('  g_free (skeleton->priv->properties);\n')
-        self.c.write('  g_list_free_full (skeleton->priv->changed_properties, (GDestroyNotify) 
_changed_property_free);\n')
-        self.c.write('  if (skeleton->priv->changed_properties_idle_source != NULL)\n')
-        self.c.write('    g_source_destroy (skeleton->priv->changed_properties_idle_source);\n')
-        self.c.write('  g_main_context_unref (skeleton->priv->context);\n')
-        self.c.write('  g_mutex_clear (&skeleton->priv->lock);\n')
-        self.c.write('  G_OBJECT_CLASS (%s_skeleton_parent_class)->finalize (object);\n'
-                     '}\n'
-                     '\n'%(i.name_lower))
+            self.outfile.write('  guint n;\n'
+                               '  for (n = 0; n < %d; n++)\n'
+                               '    g_value_unset (&skeleton->priv->properties[n]);\n'%(len(i.properties)))
+            self.outfile.write('  g_free (skeleton->priv->properties);\n')
+        self.outfile.write('  g_list_free_full (skeleton->priv->changed_properties, (GDestroyNotify) 
_changed_property_free);\n')
+        self.outfile.write('  if (skeleton->priv->changed_properties_idle_source != NULL)\n')
+        self.outfile.write('    g_source_destroy (skeleton->priv->changed_properties_idle_source);\n')
+        self.outfile.write('  g_main_context_unref (skeleton->priv->context);\n')
+        self.outfile.write('  g_mutex_clear (&skeleton->priv->lock);\n')
+        self.outfile.write('  G_OBJECT_CLASS (%s_skeleton_parent_class)->finalize (object);\n'
+                           '}\n'
+                           '\n'%(i.name_lower))
 
         # property accessors (TODO: generate PropertiesChanged signals in setter)
         if len(i.properties) > 0:
-            self.c.write('static void\n'
-                         '%s_skeleton_get_property (GObject      *object,\n'
-                         '  guint         prop_id,\n'
-                         '  GValue       *value,\n'
-                         '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
-                         '{\n'%(i.name_lower))
-            self.c.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
-                         '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  g_value_copy (&skeleton->priv->properties[prop_id - 1], value);\n'
-                         '  g_mutex_unlock (&skeleton->priv->lock);\n'
-                         %(i.camel_name, i.ns_upper, i.name_upper, len(i.properties)))
-            self.c.write('}\n'
-                         '\n')
+            self.outfile.write('static void\n'
+                               '%s_skeleton_get_property (GObject      *object,\n'
+                               '  guint         prop_id,\n'
+                            '  GValue       *value,\n'
+                            '  GParamSpec   *pspec G_GNUC_UNUSED)\n'
+                            '{\n'%(i.name_lower))
+            self.outfile.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
+                               '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  g_value_copy (&skeleton->priv->properties[prop_id - 1], value);\n'
+                               '  g_mutex_unlock (&skeleton->priv->lock);\n'
+                               %(i.camel_name, i.ns_upper, i.name_upper, len(i.properties)))
+            self.outfile.write('}\n'
+                               '\n')
 
             # if property is already scheduled then re-use entry.. though it could be
             # that the user did
@@ -2454,232 +2470,232 @@ class CodeGenerator:
             # change event. If the latest value is not different from the original
             # one, we can simply ignore the ChangedProperty
             #
-            self.c.write('static gboolean\n'
-                         '_%s_emit_changed (gpointer user_data)\n'
-                         '{\n'
-                         '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
-                         %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
-            self.c.write('  GList *l;\n'
-                         '  GVariantBuilder builder;\n'
-                         '  GVariantBuilder invalidated_builder;\n'
-                         '  guint num_changes;\n'
-                         '\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}"));\n'
-                         '  g_variant_builder_init (&invalidated_builder, G_VARIANT_TYPE ("as"));\n'
-                         '  for (l = skeleton->priv->changed_properties, num_changes = 0; l != NULL; l = 
l->next)\n'
-                         '    {\n'
-                         '      ChangedProperty *cp = l->data;\n'
-                         '      GVariant *variant;\n'
-                         '      const GValue *cur_value;\n'
-                         '\n'
-                         '      cur_value = &skeleton->priv->properties[cp->prop_id - 1];\n'
-                         '      if (!_g_value_equal (cur_value, &cp->orig_value))\n'
-                         '        {\n'
-                         '          variant = g_dbus_gvalue_to_gvariant (cur_value, G_VARIANT_TYPE 
(cp->info->parent_struct.signature));\n'
-                         '          g_variant_builder_add (&builder, "{sv}", cp->info->parent_struct.name, 
variant);\n'
-                         '          g_variant_unref (variant);\n'
-                         '          num_changes++;\n'
-                         '        }\n'
-                         '    }\n'
-                         '  if (num_changes > 0)\n'
-                         '    {\n'
-                         '      GList *connections, *ll;\n'
-                         '      GVariant *signal_variant;'
-                         '\n'
-                         '      signal_variant = g_variant_ref_sink (g_variant_new ("(sa{sv}as)", "%s",\n'
-                         '                                           &builder, &invalidated_builder));\n'
-                         '      connections = g_dbus_interface_skeleton_get_connections 
(G_DBUS_INTERFACE_SKELETON (skeleton));\n'
-                         '      for (ll = connections; ll != NULL; ll = ll->next)\n'
-                         '        {\n'
-                         '          GDBusConnection *connection = ll->data;\n'
-                         '\n'
-                         '          g_dbus_connection_emit_signal (connection,\n'
-                         '                                         NULL, 
g_dbus_interface_skeleton_get_object_path (G_DBUS_INTERFACE_SKELETON (skeleton)),\n'
-                         '                                         "org.freedesktop.DBus.Properties",\n'
-                         '                                         "PropertiesChanged",\n'
-                         '                                         signal_variant,\n'
-                         '                                         NULL);\n'
-                         '        }\n'
-                         '      g_variant_unref (signal_variant);\n'
-                         '      g_list_free_full (connections, g_object_unref);\n'
-                         '    }\n'
-                         '  else\n'
-                         '    {\n'
-                         '      g_variant_builder_clear (&builder);\n'
-                         '      g_variant_builder_clear (&invalidated_builder);\n'
-                         '    }\n'
-                         %(i.name))
-            self.c.write('  g_list_free_full (skeleton->priv->changed_properties, (GDestroyNotify) 
_changed_property_free);\n')
-            self.c.write('  skeleton->priv->changed_properties = NULL;\n')
-            self.c.write('  skeleton->priv->changed_properties_idle_source = NULL;\n')
-            self.c.write('  g_mutex_unlock (&skeleton->priv->lock);\n')
-            self.c.write('  return FALSE;\n'
-                         '}\n'
-                         '\n')
+            self.outfile.write('static gboolean\n'
+                               '_%s_emit_changed (gpointer user_data)\n'
+                               '{\n'
+                               '  %sSkeleton *skeleton = %s%s_SKELETON (user_data);\n'
+                               %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper))
+            self.outfile.write('  GList *l;\n'
+                               '  GVariantBuilder builder;\n'
+                               '  GVariantBuilder invalidated_builder;\n'
+                               '  guint num_changes;\n'
+                               '\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}"));\n'
+                               '  g_variant_builder_init (&invalidated_builder, G_VARIANT_TYPE ("as"));\n'
+                               '  for (l = skeleton->priv->changed_properties, num_changes = 0; l != NULL; l 
= l->next)\n'
+                               '    {\n'
+                               '      ChangedProperty *cp = l->data;\n'
+                               '      GVariant *variant;\n'
+                               '      const GValue *cur_value;\n'
+                               '\n'
+                               '      cur_value = &skeleton->priv->properties[cp->prop_id - 1];\n'
+                               '      if (!_g_value_equal (cur_value, &cp->orig_value))\n'
+                               '        {\n'
+                               '          variant = g_dbus_gvalue_to_gvariant (cur_value, G_VARIANT_TYPE 
(cp->info->parent_struct.signature));\n'
+                               '          g_variant_builder_add (&builder, "{sv}", 
cp->info->parent_struct.name, variant);\n'
+                               '          g_variant_unref (variant);\n'
+                               '          num_changes++;\n'
+                               '        }\n'
+                               '    }\n'
+                               '  if (num_changes > 0)\n'
+                               '    {\n'
+                               '      GList *connections, *ll;\n'
+                               '      GVariant *signal_variant;'
+                               '\n'
+                               '      signal_variant = g_variant_ref_sink (g_variant_new ("(sa{sv}as)", 
"%s",\n'
+                               '                                           &builder, 
&invalidated_builder));\n'
+                               '      connections = g_dbus_interface_skeleton_get_connections 
(G_DBUS_INTERFACE_SKELETON (skeleton));\n'
+                               '      for (ll = connections; ll != NULL; ll = ll->next)\n'
+                               '        {\n'
+                               '          GDBusConnection *connection = ll->data;\n'
+                               '\n'
+                               '          g_dbus_connection_emit_signal (connection,\n'
+                               '                                         NULL, 
g_dbus_interface_skeleton_get_object_path (G_DBUS_INTERFACE_SKELETON (skeleton)),\n'
+                               '                                         
"org.freedesktop.DBus.Properties",\n'
+                               '                                         "PropertiesChanged",\n'
+                               '                                         signal_variant,\n'
+                               '                                         NULL);\n'
+                               '        }\n'
+                               '      g_variant_unref (signal_variant);\n'
+                               '      g_list_free_full (connections, g_object_unref);\n'
+                               '    }\n'
+                               '  else\n'
+                               '    {\n'
+                               '      g_variant_builder_clear (&builder);\n'
+                               '      g_variant_builder_clear (&invalidated_builder);\n'
+                               '    }\n'
+                               %(i.name))
+            self.outfile.write('  g_list_free_full (skeleton->priv->changed_properties, (GDestroyNotify) 
_changed_property_free);\n')
+            self.outfile.write('  skeleton->priv->changed_properties = NULL;\n')
+            self.outfile.write('  skeleton->priv->changed_properties_idle_source = NULL;\n')
+            self.outfile.write('  g_mutex_unlock (&skeleton->priv->lock);\n')
+            self.outfile.write('  return FALSE;\n'
+                               '}\n'
+                               '\n')
             # holding lock while being called
-            self.c.write('static void\n'
-                         '_%s_schedule_emit_changed (%sSkeleton *skeleton, const _ExtendedGDBusPropertyInfo 
*info, guint prop_id, const GValue *orig_value)\n'
-                         '{\n'
-                         '  ChangedProperty *cp;\n'
-                         '  GList *l;\n'
-                         '  cp = NULL;\n'
-                         '  for (l = skeleton->priv->changed_properties; l != NULL; l = l->next)\n'
-                         '    {\n'
-                         '      ChangedProperty *i_cp = l->data;\n'
-                         '      if (i_cp->info == info)\n'
-                         '        {\n'
-                         '          cp = i_cp;\n'
-                         '          break;\n'
-                         '        }\n'
-                         '    }\n'
-                         %(i.name_lower, i.camel_name))
-            self.c.write('  if (cp == NULL)\n'
-                         '    {\n'
-                         '      cp = g_new0 (ChangedProperty, 1);\n'
-                         '      cp->prop_id = prop_id;\n'
-                         '      cp->info = info;\n'
-                         '      skeleton->priv->changed_properties = g_list_prepend 
(skeleton->priv->changed_properties, cp);\n'
-                         '      g_value_init (&cp->orig_value, G_VALUE_TYPE (orig_value));\n'
-                         '      g_value_copy (orig_value, &cp->orig_value);\n'
-                         '    }\n'
-                         '}\n'
-                         '\n'
-                         %())
+            self.outfile.write('static void\n'
+                               '_%s_schedule_emit_changed (%sSkeleton *skeleton, const 
_ExtendedGDBusPropertyInfo *info, guint prop_id, const GValue *orig_value)\n'
+                               '{\n'
+                               '  ChangedProperty *cp;\n'
+                               '  GList *l;\n'
+                               '  cp = NULL;\n'
+                               '  for (l = skeleton->priv->changed_properties; l != NULL; l = l->next)\n'
+                               '    {\n'
+                               '      ChangedProperty *i_cp = l->data;\n'
+                               '      if (i_cp->info == info)\n'
+                               '        {\n'
+                               '          cp = i_cp;\n'
+                               '          break;\n'
+                               '        }\n'
+                               '    }\n'
+                               %(i.name_lower, i.camel_name))
+            self.outfile.write('  if (cp == NULL)\n'
+                               '    {\n'
+                               '      cp = g_new0 (ChangedProperty, 1);\n'
+                               '      cp->prop_id = prop_id;\n'
+                               '      cp->info = info;\n'
+                               '      skeleton->priv->changed_properties = g_list_prepend 
(skeleton->priv->changed_properties, cp);\n'
+                               '      g_value_init (&cp->orig_value, G_VALUE_TYPE (orig_value));\n'
+                               '      g_value_copy (orig_value, &cp->orig_value);\n'
+                               '    }\n'
+                               '}\n'
+                               '\n'
+                               %())
 
             # Postpone setting up the refresh source until the ::notify signal is emitted as
             # this allows use of g_object_freeze_notify()/g_object_thaw_notify() ...
             # This is useful when updating several properties from another thread than
             # where the idle will be emitted from
-            self.c.write('static void\n'
-                         '%s_skeleton_notify (GObject      *object,\n'
-                         '  GParamSpec *pspec G_GNUC_UNUSED)\n'
-                         '{\n'
-                         '  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  if (skeleton->priv->changed_properties != NULL &&\n'
-                         '      skeleton->priv->changed_properties_idle_source == NULL)\n'
-                         '    {\n'
-                         '      skeleton->priv->changed_properties_idle_source = g_idle_source_new ();\n'
-                         '      g_source_set_priority (skeleton->priv->changed_properties_idle_source, 
G_PRIORITY_DEFAULT);\n'
-                         '      g_source_set_callback (skeleton->priv->changed_properties_idle_source, 
_%s_emit_changed, g_object_ref (skeleton), (GDestroyNotify) g_object_unref);\n'
-                         '      g_source_set_name (skeleton->priv->changed_properties_idle_source, 
"[generated] _%s_emit_changed");\n'
-                         '      g_source_attach (skeleton->priv->changed_properties_idle_source, 
skeleton->priv->context);\n'
-                         '      g_source_unref (skeleton->priv->changed_properties_idle_source);\n'
-                         '    }\n'
-                         '  g_mutex_unlock (&skeleton->priv->lock);\n'
-                         '}\n'
-                         '\n'
-                         %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper, i.name_lower, i.name_lower))
-
-            self.c.write('static void\n'
-                         '%s_skeleton_set_property (GObject      *object,\n'
-                         '  guint         prop_id,\n'
-                         '  const GValue *value,\n'
-                         '  GParamSpec   *pspec)\n'
-                         '{\n'%(i.name_lower))
-            self.c.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
-                         '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  g_object_freeze_notify (object);\n'
-                         '  if (!_g_value_equal (value, &skeleton->priv->properties[prop_id - 1]))\n'
-                         '    {\n'
-                         '      if (g_dbus_interface_skeleton_get_connection (G_DBUS_INTERFACE_SKELETON 
(skeleton)) != NULL)\n'
-                         '        _%s_schedule_emit_changed (skeleton, _%s_property_info_pointers[prop_id - 
1], prop_id, &skeleton->priv->properties[prop_id - 1]);\n'
-                         '      g_value_copy (value, &skeleton->priv->properties[prop_id - 1]);\n'
-                         '      g_object_notify_by_pspec (object, pspec);\n'
-                         '    }\n'
-                         '  g_mutex_unlock (&skeleton->priv->lock);\n'
-                         '  g_object_thaw_notify (object);\n'
-                         %(i.camel_name, i.ns_upper, i.name_upper, len(i.properties), i.name_lower, 
i.name_lower))
-            self.c.write('}\n'
-                         '\n')
-
-        self.c.write('static void\n'
-                     '%s_skeleton_init (%sSkeleton *skeleton)\n'
-                     '{\n'
-                     '#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n'
-                     '  skeleton->priv = %s_skeleton_get_instance_private (skeleton);\n'
-                     '#else\n'
-                     '  skeleton->priv = G_TYPE_INSTANCE_GET_PRIVATE (skeleton, %sTYPE_%s_SKELETON, 
%sSkeletonPrivate);\n'
-                     '#endif\n\n'
-                     %(i.name_lower, i.camel_name,
-                       i.name_lower,
-                       i.ns_upper, i.name_upper, i.camel_name))
-        self.c.write('  g_mutex_init (&skeleton->priv->lock);\n')
-        self.c.write('  skeleton->priv->context = g_main_context_ref_thread_default ();\n')
+            self.outfile.write('static void\n'
+                               '%s_skeleton_notify (GObject      *object,\n'
+                               '  GParamSpec *pspec G_GNUC_UNUSED)\n'
+                               '{\n'
+                               '  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  if (skeleton->priv->changed_properties != NULL &&\n'
+                               '      skeleton->priv->changed_properties_idle_source == NULL)\n'
+                               '    {\n'
+                               '      skeleton->priv->changed_properties_idle_source = g_idle_source_new 
();\n'
+                               '      g_source_set_priority (skeleton->priv->changed_properties_idle_source, 
G_PRIORITY_DEFAULT);\n'
+                               '      g_source_set_callback (skeleton->priv->changed_properties_idle_source, 
_%s_emit_changed, g_object_ref (skeleton), (GDestroyNotify) g_object_unref);\n'
+                               '      g_source_set_name (skeleton->priv->changed_properties_idle_source, 
"[generated] _%s_emit_changed");\n'
+                               '      g_source_attach (skeleton->priv->changed_properties_idle_source, 
skeleton->priv->context);\n'
+                               '      g_source_unref (skeleton->priv->changed_properties_idle_source);\n'
+                               '    }\n'
+                               '  g_mutex_unlock (&skeleton->priv->lock);\n'
+                               '}\n'
+                               '\n'
+                               %(i.name_lower, i.camel_name, i.ns_upper, i.name_upper, i.name_lower, 
i.name_lower))
+
+            self.outfile.write('static void\n'
+                               '%s_skeleton_set_property (GObject      *object,\n'
+                               '  guint         prop_id,\n'
+                               '  const GValue *value,\n'
+                               '  GParamSpec   *pspec)\n'
+                               '{\n'%(i.name_lower))
+            self.outfile.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'
+                               '  g_assert (prop_id != 0 && prop_id - 1 < %d);\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  g_object_freeze_notify (object);\n'
+                               '  if (!_g_value_equal (value, &skeleton->priv->properties[prop_id - 1]))\n'
+                               '    {\n'
+                               '      if (g_dbus_interface_skeleton_get_connection 
(G_DBUS_INTERFACE_SKELETON (skeleton)) != NULL)\n'
+                               '        _%s_schedule_emit_changed (skeleton, 
_%s_property_info_pointers[prop_id - 1], prop_id, &skeleton->priv->properties[prop_id - 1]);\n'
+                               '      g_value_copy (value, &skeleton->priv->properties[prop_id - 1]);\n'
+                               '      g_object_notify_by_pspec (object, pspec);\n'
+                               '    }\n'
+                               '  g_mutex_unlock (&skeleton->priv->lock);\n'
+                               '  g_object_thaw_notify (object);\n'
+                               %(i.camel_name, i.ns_upper, i.name_upper, len(i.properties), i.name_lower, 
i.name_lower))
+            self.outfile.write('}\n'
+                               '\n')
+
+        self.outfile.write('static void\n'
+                           '%s_skeleton_init (%sSkeleton *skeleton)\n'
+                           '{\n'
+                           '#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38\n'
+                           '  skeleton->priv = %s_skeleton_get_instance_private (skeleton);\n'
+                           '#else\n'
+                           '  skeleton->priv = G_TYPE_INSTANCE_GET_PRIVATE (skeleton, %sTYPE_%s_SKELETON, 
%sSkeletonPrivate);\n'
+                           '#endif\n\n'
+                           %(i.name_lower, i.camel_name,
+                             i.name_lower,
+                             i.ns_upper, i.name_upper, i.camel_name))
+        self.outfile.write('  g_mutex_init (&skeleton->priv->lock);\n')
+        self.outfile.write('  skeleton->priv->context = g_main_context_ref_thread_default ();\n')
         if len(i.properties) > 0:
-            self.c.write('  skeleton->priv->properties = g_new0 (GValue, %d);\n'%(len(i.properties)))
+            self.outfile.write('  skeleton->priv->properties = g_new0 (GValue, %d);\n'%(len(i.properties)))
             n = 0
             for p in i.properties:
-                self.c.write('  g_value_init (&skeleton->priv->properties[%d], %s);\n'%(n, p.arg.gtype))
+                self.outfile.write('  g_value_init (&skeleton->priv->properties[%d], %s);\n'%(n, 
p.arg.gtype))
                 n += 1
-        self.c.write('}\n'
-                     '\n')
+        self.outfile.write('}\n'
+                           '\n')
 
         # property vfuncs
         n = 0
         for p in i.properties:
-            self.c.write('static %s\n'
-                         '%s_skeleton_get_%s (%s *object)\n'
-                         '{\n'
-                         %(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name))
-            self.c.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'%(i.camel_name, i.ns_upper, 
i.name_upper))
-            self.c.write('  %svalue;\n'
-                         '  g_mutex_lock (&skeleton->priv->lock);\n'
-                         '  value = %s (&(skeleton->priv->properties[%d]));\n'
-                         '  g_mutex_unlock (&skeleton->priv->lock);\n'
-                         %(p.arg.ctype_in_g, p.arg.gvalue_get, n))
-            self.c.write('  return value;\n')
-            self.c.write('}\n')
-            self.c.write('\n')
+            self.outfile.write('static %s\n'
+                               '%s_skeleton_get_%s (%s *object)\n'
+                               '{\n'
+                               %(p.arg.ctype_in, i.name_lower, p.name_lower, i.camel_name))
+            self.outfile.write('  %sSkeleton *skeleton = %s%s_SKELETON (object);\n'%(i.camel_name, 
i.ns_upper, i.name_upper))
+            self.outfile.write('  %svalue;\n'
+                               '  g_mutex_lock (&skeleton->priv->lock);\n'
+                               '  value = %s (&(skeleton->priv->properties[%d]));\n'
+                               '  g_mutex_unlock (&skeleton->priv->lock);\n'
+                               %(p.arg.ctype_in_g, p.arg.gvalue_get, n))
+            self.outfile.write('  return value;\n')
+            self.outfile.write('}\n')
+            self.outfile.write('\n')
             n += 1
 
-        self.c.write('static void\n'
-                     '%s_skeleton_class_init (%sSkeletonClass *klass)\n'
-                     '{\n'
-                     '  GObjectClass *gobject_class;\n'
-                     '  GDBusInterfaceSkeletonClass *skeleton_class;\n'
-                     '\n'
-                     '  gobject_class = G_OBJECT_CLASS (klass);\n'
-                     '  gobject_class->finalize = %s_skeleton_finalize;\n'
-                     %(i.name_lower, i.camel_name, i.name_lower))
+        self.outfile.write('static void\n'
+                           '%s_skeleton_class_init (%sSkeletonClass *klass)\n'
+                           '{\n'
+                           '  GObjectClass *gobject_class;\n'
+                           '  GDBusInterfaceSkeletonClass *skeleton_class;\n'
+                           '\n'
+                           '  gobject_class = G_OBJECT_CLASS (klass);\n'
+                           '  gobject_class->finalize = %s_skeleton_finalize;\n'
+                           %(i.name_lower, i.camel_name, i.name_lower))
         if len(i.properties) > 0:
-            self.c.write('  gobject_class->get_property = %s_skeleton_get_property;\n'
-                         '  gobject_class->set_property = %s_skeleton_set_property;\n'
-                         '  gobject_class->notify       = %s_skeleton_notify;\n'
-                         '\n'%(i.name_lower, i.name_lower, i.name_lower))
-            self.c.write('\n'
-                         '  %s_override_properties (gobject_class, 1);\n'%(i.name_lower))
-        self.c.write('\n'
-                     '  skeleton_class = G_DBUS_INTERFACE_SKELETON_CLASS (klass);\n');
-        self.c.write('  skeleton_class->get_info = %s_skeleton_dbus_interface_get_info;\n'%(i.name_lower))
-        self.c.write('  skeleton_class->get_properties = 
%s_skeleton_dbus_interface_get_properties;\n'%(i.name_lower))
-        self.c.write('  skeleton_class->flush = %s_skeleton_dbus_interface_flush;\n'%(i.name_lower))
-        self.c.write('  skeleton_class->get_vtable = 
%s_skeleton_dbus_interface_get_vtable;\n'%(i.name_lower))
-
-        self.c.write('\n'
-                     '#if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_38\n'
-                     '  g_type_class_add_private (klass, sizeof (%sSkeletonPrivate));\n'
-                     '#endif\n'%(i.camel_name))
-
-        self.c.write('}\n'
-                     '\n')
-
-        self.c.write('static void\n'
-                     '%s_skeleton_iface_init (%sIface *iface)\n'
-                     '{\n'
-                     %(i.name_lower, i.camel_name))
+            self.outfile.write('  gobject_class->get_property = %s_skeleton_get_property;\n'
+                               '  gobject_class->set_property = %s_skeleton_set_property;\n'
+                               '  gobject_class->notify       = %s_skeleton_notify;\n'
+                               '\n'%(i.name_lower, i.name_lower, i.name_lower))
+            self.outfile.write('\n'
+                               '  %s_override_properties (gobject_class, 1);\n'%(i.name_lower))
+        self.outfile.write('\n'
+                           '  skeleton_class = G_DBUS_INTERFACE_SKELETON_CLASS (klass);\n');
+        self.outfile.write('  skeleton_class->get_info = 
%s_skeleton_dbus_interface_get_info;\n'%(i.name_lower))
+        self.outfile.write('  skeleton_class->get_properties = 
%s_skeleton_dbus_interface_get_properties;\n'%(i.name_lower))
+        self.outfile.write('  skeleton_class->flush = %s_skeleton_dbus_interface_flush;\n'%(i.name_lower))
+        self.outfile.write('  skeleton_class->get_vtable = 
%s_skeleton_dbus_interface_get_vtable;\n'%(i.name_lower))
+
+        self.outfile.write('\n'
+                           '#if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_38\n'
+                           '  g_type_class_add_private (klass, sizeof (%sSkeletonPrivate));\n'
+                           '#endif\n'%(i.camel_name))
+
+        self.outfile.write('}\n'
+                           '\n')
+
+        self.outfile.write('static void\n'
+                           '%s_skeleton_iface_init (%sIface *iface)\n'
+                           '{\n'
+                           %(i.name_lower, i.camel_name))
         for s in i.signals:
-            self.c.write('  iface->%s = _%s_on_signal_%s;\n'
-                         %(s.name_lower, i.name_lower, s.name_lower))
+            self.outfile.write('  iface->%s = _%s_on_signal_%s;\n'
+                               %(s.name_lower, i.name_lower, s.name_lower))
         for p in i.properties:
-            self.c.write('  iface->get_%s = %s_skeleton_get_%s;\n'%(p.name_lower, i.name_lower, 
p.name_lower))
-        self.c.write('}\n'
-                     '\n')
+            self.outfile.write('  iface->get_%s = %s_skeleton_get_%s;\n'%(p.name_lower, i.name_lower, 
p.name_lower))
+        self.outfile.write('}\n'
+                           '\n')
 
         # constructors
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %s_skeleton_new:\n'
                 ' *\n'
@@ -2687,24 +2703,24 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: (transfer full) (type %sSkeleton): The skeleton object.\n'
                 %(i.name_lower, i.name, i.camel_name), False))
-        self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-        self.c.write('%s *\n'
-                     '%s_skeleton_new (void)\n'
-                     '{\n'
-                     '  return %s%s (g_object_new (%sTYPE_%s_SKELETON, NULL));\n'
-                     '}\n'
-                     '\n'%(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.ns_upper, i.name_upper))
+        self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+        self.outfile.write('%s *\n'
+                           '%s_skeleton_new (void)\n'
+                           '{\n'
+                           '  return %s%s (g_object_new (%sTYPE_%s_SKELETON, NULL));\n'
+                           '}\n'
+                           '\n'%(i.camel_name, i.name_lower, i.ns_upper, i.name_upper, i.ns_upper, 
i.name_upper))
 
     # ---------------------------------------------------------------------------------------------------
 
     def generate_object(self):
-        self.c.write('/* ------------------------------------------------------------------------\n'
-                     ' * Code for Object, ObjectProxy and ObjectSkeleton\n'
-                     ' * ------------------------------------------------------------------------\n'
-                     ' */\n'
-                     '\n')
+        self.outfile.write('/* ------------------------------------------------------------------------\n'
+                           ' * Code for Object, ObjectProxy and ObjectSkeleton\n'
+                           ' * ------------------------------------------------------------------------\n'
+                           ' */\n'
+                           '\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * SECTION:%sObject\n'
                 ' * @title: %sObject\n'
@@ -2713,18 +2729,18 @@ class CodeGenerator:
                 ' * This section contains the #%sObject, #%sObjectProxy, and #%sObjectSkeleton types which 
make it easier to work with objects implementing generated types for D-Bus interfaces.\n'
                 ' */\n'
                 %(self.namespace, self.namespace, self.namespace, self.namespace, self.namespace), False))
-        self.c.write('\n')
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObject:\n'
                 ' *\n'
                 ' * The #%sObject type is a specialized container of interfaces.\n'
                 ' */\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write('\n')
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectIface:\n'
                 ' * @parent_iface: The parent interface.\n'
@@ -2732,17 +2748,17 @@ class CodeGenerator:
                 ' * Virtual table for the #%sObject interface.\n'
                 ' */\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write('\n')
-
-        self.c.write('typedef %sObjectIface %sObjectInterface;\n'%(self.namespace, self.namespace))
-        self.c.write('G_DEFINE_INTERFACE_WITH_CODE (%sObject, %sobject, G_TYPE_OBJECT, 
g_type_interface_add_prerequisite (g_define_type_id, G_TYPE_DBUS_OBJECT);)\n'%(self.namespace, self.ns_lower))
-        self.c.write('\n')
-        self.c.write('static void\n'
-                     '%sobject_default_init (%sObjectIface *iface)\n'
-                     '{\n'
-                     %(self.ns_lower, self.namespace));
+        self.outfile.write('\n')
+
+        self.outfile.write('typedef %sObjectIface %sObjectInterface;\n'%(self.namespace, self.namespace))
+        self.outfile.write('G_DEFINE_INTERFACE_WITH_CODE (%sObject, %sobject, G_TYPE_OBJECT, 
g_type_interface_add_prerequisite (g_define_type_id, G_TYPE_DBUS_OBJECT);)\n'%(self.namespace, self.ns_lower))
+        self.outfile.write('\n')
+        self.outfile.write('static void\n'
+                           '%sobject_default_init (%sObjectIface *iface)\n'
+                           '{\n'
+                           %(self.ns_lower, self.namespace));
         for i in self.ifaces:
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '  /**\n'
                     '   * %sObject:%s:\n'
                     '   *\n'
@@ -2750,15 +2766,15 @@ class CodeGenerator:
                     '   *\n'
                     '   * Connect to the #GObject::notify signal to get informed of property changes.\n'
                     %(self.namespace, i.name_hyphen, i.camel_name, i.name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 2)
-            self.c.write('  g_object_interface_install_property (iface, g_param_spec_object ("%s", "%s", 
"%s", %sTYPE_%s, G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS));\n'
-                         '\n'
-                         %(i.name_hyphen, i.name_hyphen, i.name_hyphen, self.ns_upper, i.name_upper))
-        self.c.write('}\n'
-                     '\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 2)
+            self.outfile.write('  g_object_interface_install_property (iface, g_param_spec_object ("%s", 
"%s", "%s", %sTYPE_%s, G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS));\n'
+                               '\n'
+                               %(i.name_hyphen, i.name_hyphen, i.name_hyphen, self.ns_upper, i.name_upper))
+        self.outfile.write('}\n'
+                           '\n')
 
         for i in self.ifaces:
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %sobject_get_%s:\n'
                     ' * @object: A #%sObject.\n'
@@ -2767,21 +2783,21 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: (transfer full): A #%s that must be freed with g_object_unref() or %%NULL 
if @object does not implement the interface.\n'
                     %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name, i.name, 
i.camel_name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-            self.c.write ('%s *%sobject_get_%s (%sObject *object)\n'
-                          %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
-            self.c.write('{\n'
-                         '  GDBusInterface *ret;\n'
-                         '  ret = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
-                         '  if (ret == NULL)\n'
-                         '    return NULL;\n'
-                         '  return %s%s (ret);\n'
-                         '}\n'
-                         '\n'
-                         %(i.name, self.ns_upper, i.name_upper))
-        self.c.write('\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+            self.outfile.write('%s *%sobject_get_%s (%sObject *object)\n'
+                               %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
+            self.outfile.write('{\n'
+                               '  GDBusInterface *ret;\n'
+                               '  ret = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
+                               '  if (ret == NULL)\n'
+                               '    return NULL;\n'
+                               '  return %s%s (ret);\n'
+                               '}\n'
+                               '\n'
+                               %(i.name, self.ns_upper, i.name_upper))
+        self.outfile.write('\n')
         for i in self.ifaces:
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %sobject_peek_%s: (skip)\n'
                     ' * @object: A #%sObject.\n'
@@ -2792,134 +2808,134 @@ class CodeGenerator:
                     ' *\n'
                     ' * Returns: (transfer none): A #%s or %%NULL if @object does not implement the 
interface. Do not free the returned object, it is owned by @object.\n'
                     %(self.ns_lower, i.name_upper.lower(), self.namespace, self.ns_lower, 
i.name_upper.lower(), i.camel_name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-            self.c.write ('%s *%sobject_peek_%s (%sObject *object)\n'
-                          %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
-            self.c.write('{\n'
-                         '  GDBusInterface *ret;\n'
-                         '  ret = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
-                         '  if (ret == NULL)\n'
-                         '    return NULL;\n'
-                         '  g_object_unref (ret);\n'
-                         '  return %s%s (ret);\n'
-                         '}\n'
-                         '\n'
-                         %(i.name, self.ns_upper, i.name_upper))
-        self.c.write('\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+            self.outfile.write('%s *%sobject_peek_%s (%sObject *object)\n'
+                               %(i.camel_name, self.ns_lower, i.name_upper.lower(), self.namespace))
+            self.outfile.write('{\n'
+                               '  GDBusInterface *ret;\n'
+                               '  ret = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
+                               '  if (ret == NULL)\n'
+                               '    return NULL;\n'
+                               '  g_object_unref (ret);\n'
+                               '  return %s%s (ret);\n'
+                               '}\n'
+                               '\n'
+                               %(i.name, self.ns_upper, i.name_upper))
+        self.outfile.write('\n')
         # shared by ObjectProxy and ObjectSkeleton classes
-        self.c.write('static void\n'
-                     '%sobject_notify (GDBusObject *object, GDBusInterface *interface)\n'
-                     '{\n'
-                     '  _ExtendedGDBusInterfaceInfo *info = (_ExtendedGDBusInterfaceInfo *) 
g_dbus_interface_get_info (interface);\n'
-                     '  /* info can be NULL if the other end is using a D-Bus interface we don\'t know\n'
-                     '   * anything about, for example old generated code in this process talking to\n'
-                     '   * newer generated code in the other process. */\n'
-                     '  if (info != NULL)\n'
-                     '    g_object_notify (G_OBJECT (object), info->hyphen_name);\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower))
-
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write('static void\n'
+                           '%sobject_notify (GDBusObject *object, GDBusInterface *interface)\n'
+                           '{\n'
+                           '  _ExtendedGDBusInterfaceInfo *info = (_ExtendedGDBusInterfaceInfo *) 
g_dbus_interface_get_info (interface);\n'
+                           '  /* info can be NULL if the other end is using a D-Bus interface we don\'t 
know\n'
+                           '   * anything about, for example old generated code in this process talking to\n'
+                           '   * newer generated code in the other process. */\n'
+                           '  if (info != NULL)\n'
+                           '    g_object_notify (G_OBJECT (object), info->hyphen_name);\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower))
+
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectProxy:\n'
                 ' *\n'
                 ' * The #%sObjectProxy structure contains only private data and should only be accessed 
using the provided API.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectProxyClass:\n'
                 ' * @parent_class: The parent class.\n'
                 ' *\n'
                 ' * Class structure for #%sObjectProxy.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
         # class boilerplate
-        self.c.write('static void\n'
-                     '%sobject_proxy__%sobject_iface_init (%sObjectIface *iface G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_lower, self.namespace))
-        self.c.write('static void\n'
-                     '%sobject_proxy__g_dbus_object_iface_init (GDBusObjectIface *iface)\n'
-                     '{\n'
-                     '  iface->interface_added = %sobject_notify;\n'
-                     '  iface->interface_removed = %sobject_notify;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_lower, self.ns_lower))
-        self.c.write('\n')
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sObjectProxy, %sobject_proxy, G_TYPE_DBUS_OBJECT_PROXY,\n'
-                     '                         G_IMPLEMENT_INTERFACE (%sTYPE_OBJECT, 
%sobject_proxy__%sobject_iface_init)\n'
-                     '                         G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT, 
%sobject_proxy__g_dbus_object_iface_init))\n'
-                     '\n'
-                     %(self.namespace, self.ns_lower, self.ns_upper, self.ns_lower, self.ns_lower, 
self.ns_lower))
+        self.outfile.write('static void\n'
+                           '%sobject_proxy__%sobject_iface_init (%sObjectIface *iface G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_lower, self.namespace))
+        self.outfile.write('static void\n'
+                           '%sobject_proxy__g_dbus_object_iface_init (GDBusObjectIface *iface)\n'
+                           '{\n'
+                           '  iface->interface_added = %sobject_notify;\n'
+                           '  iface->interface_removed = %sobject_notify;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_lower, self.ns_lower))
+        self.outfile.write('\n')
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sObjectProxy, %sobject_proxy, 
G_TYPE_DBUS_OBJECT_PROXY,\n'
+                           '                         G_IMPLEMENT_INTERFACE (%sTYPE_OBJECT, 
%sobject_proxy__%sobject_iface_init)\n'
+                           '                         G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT, 
%sobject_proxy__g_dbus_object_iface_init))\n'
+                           '\n'
+                           %(self.namespace, self.ns_lower, self.ns_upper, self.ns_lower, self.ns_lower, 
self.ns_lower))
         # class boilerplate
-        self.c.write('static void\n'
-                     '%sobject_proxy_init (%sObjectProxy *object G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'%(self.ns_lower, self.namespace))
-        self.c.write('static void\n'
-                     '%sobject_proxy_set_property (GObject      *gobject,\n'
-                     '  guint         prop_id,\n'
-                     '  const GValue *value G_GNUC_UNUSED,\n'
-                     '  GParamSpec   *pspec)\n'
-                     '{\n'
-                     '  G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
-                     %(self.ns_lower))
-        self.c.write('}\n'
-                     '\n'%())
-        self.c.write('static void\n'
-                     '%sobject_proxy_get_property (GObject      *gobject,\n'
-                     '  guint         prop_id,\n'
-                     '  GValue       *value,\n'
-                     '  GParamSpec   *pspec)\n'
-                     '{\n'
-                     '  %sObjectProxy *object = %sOBJECT_PROXY (gobject);\n'
-                     '  GDBusInterface *interface;\n'
-                     '\n'
-                     '  switch (prop_id)\n'
-                     '    {\n'
-                     %(self.ns_lower, self.namespace, self.ns_upper))
+        self.outfile.write('static void\n'
+                           '%sobject_proxy_init (%sObjectProxy *object G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'%(self.ns_lower, self.namespace))
+        self.outfile.write('static void\n'
+                           '%sobject_proxy_set_property (GObject      *gobject,\n'
+                           '  guint         prop_id,\n'
+                           '  const GValue *value G_GNUC_UNUSED,\n'
+                           '  GParamSpec   *pspec)\n'
+                           '{\n'
+                           '  G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
+                           %(self.ns_lower))
+        self.outfile.write('}\n'
+                           '\n'%())
+        self.outfile.write('static void\n'
+                           '%sobject_proxy_get_property (GObject      *gobject,\n'
+                           '  guint         prop_id,\n'
+                           '  GValue       *value,\n'
+                           '  GParamSpec   *pspec)\n'
+                           '{\n'
+                           '  %sObjectProxy *object = %sOBJECT_PROXY (gobject);\n'
+                           '  GDBusInterface *interface;\n'
+                           '\n'
+                           '  switch (prop_id)\n'
+                           '    {\n'
+                           %(self.ns_lower, self.namespace, self.ns_upper))
         n = 1
         for i in self.ifaces:
-            self.c.write('    case %d:\n'
-                         '      interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
-                         '      g_value_take_object (value, interface);\n'
-                         '      break;\n'
-                         '\n'
-                         %(n, i.name))
+            self.outfile.write('    case %d:\n'
+                               '      interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object), 
"%s");\n'
+                               '      g_value_take_object (value, interface);\n'
+                               '      break;\n'
+                               '\n'
+                               %(n, i.name))
             n += 1
-        self.c.write('    default:\n'
-                     '      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
-                     '      break;\n'
-                     '  }\n'
-                     '}\n'
-                     '\n'%())
-        self.c.write('static void\n'
-                     '%sobject_proxy_class_init (%sObjectProxyClass *klass)\n'
-                     '{\n'
-                     '  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);\n'
-                     '\n'
-                     '  gobject_class->set_property = %sobject_proxy_set_property;\n'
-                     '  gobject_class->get_property = %sobject_proxy_get_property;\n'
-                     '\n'
-                     %(self.ns_lower, self.namespace, self.ns_lower, self.ns_lower))
+        self.outfile.write('    default:\n'
+                           '      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
+                           '      break;\n'
+                           '  }\n'
+                           '}\n'
+                           '\n'%())
+        self.outfile.write('static void\n'
+                           '%sobject_proxy_class_init (%sObjectProxyClass *klass)\n'
+                           '{\n'
+                           '  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);\n'
+                           '\n'
+                           '  gobject_class->set_property = %sobject_proxy_set_property;\n'
+                           '  gobject_class->get_property = %sobject_proxy_get_property;\n'
+                           '\n'
+                           %(self.ns_lower, self.namespace, self.ns_lower, self.ns_lower))
         n = 1
         for i in self.ifaces:
-            self.c.write('  g_object_class_override_property (gobject_class, %d, "%s");'
-                         '\n'
-                         %(n, i.name_hyphen))
+            self.outfile.write('  g_object_class_override_property (gobject_class, %d, "%s");'
+                               '\n'
+                               %(n, i.name_hyphen))
             n += 1
-        self.c.write('}\n'
-                     '\n')
+        self.outfile.write('}\n'
+                           '\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_proxy_new:\n'
                 ' * @connection: A #GDBusConnection.\n'
@@ -2930,7 +2946,7 @@ class CodeGenerator:
                 ' * Returns: (transfer full): The proxy object.\n'
                 ' */\n'
                 %(self.ns_lower), False))
-        self.c.write('%sObjectProxy *\n'
+        self.outfile.write('%sObjectProxy *\n'
                      '%sobject_proxy_new (GDBusConnection *connection,\n'
                      '  const gchar *object_path)\n'
                      '{\n'
@@ -2940,130 +2956,130 @@ class CodeGenerator:
                      '}\n'
                      '\n'%(self.namespace, self.ns_lower, self.ns_upper, self.ns_upper))
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectSkeleton:\n'
                 ' *\n'
                 ' * The #%sObjectSkeleton structure contains only private data and should only be accessed 
using the provided API.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectSkeletonClass:\n'
                 ' * @parent_class: The parent class.\n'
                 ' *\n'
                 ' * Class structure for #%sObjectSkeleton.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
         # class boilerplate
-        self.c.write('static void\n'
-                     '%sobject_skeleton__%sobject_iface_init (%sObjectIface *iface G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_lower, self.namespace))
-        self.c.write('\n')
-        self.c.write('static void\n'
-                     '%sobject_skeleton__g_dbus_object_iface_init (GDBusObjectIface *iface)\n'
-                     '{\n'
-                     '  iface->interface_added = %sobject_notify;\n'
-                     '  iface->interface_removed = %sobject_notify;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_lower, self.ns_lower))
-        self.c.write('G_DEFINE_TYPE_WITH_CODE (%sObjectSkeleton, %sobject_skeleton, 
G_TYPE_DBUS_OBJECT_SKELETON,\n'
-                     '                         G_IMPLEMENT_INTERFACE (%sTYPE_OBJECT, 
%sobject_skeleton__%sobject_iface_init)\n'
-                     '                         G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT, 
%sobject_skeleton__g_dbus_object_iface_init))\n'
-                     '\n'
-                     %(self.namespace, self.ns_lower, self.ns_upper, self.ns_lower, self.ns_lower, 
self.ns_lower))
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton__%sobject_iface_init (%sObjectIface *iface G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_lower, self.namespace))
+        self.outfile.write('\n')
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton__g_dbus_object_iface_init (GDBusObjectIface *iface)\n'
+                           '{\n'
+                           '  iface->interface_added = %sobject_notify;\n'
+                           '  iface->interface_removed = %sobject_notify;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_lower, self.ns_lower))
+        self.outfile.write('G_DEFINE_TYPE_WITH_CODE (%sObjectSkeleton, %sobject_skeleton, 
G_TYPE_DBUS_OBJECT_SKELETON,\n'
+                           '                         G_IMPLEMENT_INTERFACE (%sTYPE_OBJECT, 
%sobject_skeleton__%sobject_iface_init)\n'
+                           '                         G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT, 
%sobject_skeleton__g_dbus_object_iface_init))\n'
+                           '\n'
+                           %(self.namespace, self.ns_lower, self.ns_upper, self.ns_lower, self.ns_lower, 
self.ns_lower))
         # class boilerplate
-        self.c.write('static void\n'
-                     '%sobject_skeleton_init (%sObjectSkeleton *object G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'%(self.ns_lower, self.namespace))
-        self.c.write('static void\n'
-                     '%sobject_skeleton_set_property (GObject      *gobject,\n'
-                     '  guint         prop_id,\n'
-                     '  const GValue *value,\n'
-                     '  GParamSpec   *pspec)\n'
-                     '{\n'
-                     '  %sObjectSkeleton *object = %sOBJECT_SKELETON (gobject);\n'
-                     '  GDBusInterfaceSkeleton *interface;\n'
-                     '\n'
-                     '  switch (prop_id)\n'
-                     '    {\n'
-                     %(self.ns_lower, self.namespace, self.ns_upper))
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton_init (%sObjectSkeleton *object G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'%(self.ns_lower, self.namespace))
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton_set_property (GObject      *gobject,\n'
+                           '  guint         prop_id,\n'
+                           '  const GValue *value,\n'
+                           '  GParamSpec   *pspec)\n'
+                           '{\n'
+                           '  %sObjectSkeleton *object = %sOBJECT_SKELETON (gobject);\n'
+                           '  GDBusInterfaceSkeleton *interface;\n'
+                           '\n'
+                           '  switch (prop_id)\n'
+                           '    {\n'
+                           %(self.ns_lower, self.namespace, self.ns_upper))
         n = 1
         for i in self.ifaces:
-            self.c.write('    case %d:\n'
-                         '      interface = g_value_get_object (value);\n'
-                         '      if (interface != NULL)\n'
-                         '        {\n'
-                         '          g_warn_if_fail (%sIS_%s (interface));\n'
-                         '          g_dbus_object_skeleton_add_interface (G_DBUS_OBJECT_SKELETON (object), 
interface);\n'
-                         '        }\n'
-                         '      else\n'
-                         '        {\n'
-                         '          g_dbus_object_skeleton_remove_interface_by_name (G_DBUS_OBJECT_SKELETON 
(object), "%s");\n'
-                         '        }\n'
-                         '      break;\n'
-                         '\n'
-                         %(n, self.ns_upper, i.name_upper, i.name))
+            self.outfile.write('    case %d:\n'
+                               '      interface = g_value_get_object (value);\n'
+                               '      if (interface != NULL)\n'
+                               '        {\n'
+                               '          g_warn_if_fail (%sIS_%s (interface));\n'
+                               '          g_dbus_object_skeleton_add_interface (G_DBUS_OBJECT_SKELETON 
(object), interface);\n'
+                               '        }\n'
+                               '      else\n'
+                               '        {\n'
+                               '          g_dbus_object_skeleton_remove_interface_by_name 
(G_DBUS_OBJECT_SKELETON (object), "%s");\n'
+                               '        }\n'
+                               '      break;\n'
+                               '\n'
+                               %(n, self.ns_upper, i.name_upper, i.name))
             n += 1
-        self.c.write('    default:\n'
+        self.outfile.write('    default:\n'
                      '      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
                      '      break;\n'
                      '  }\n'
                      '}\n'
                      '\n'%())
-        self.c.write('static void\n'
-                     '%sobject_skeleton_get_property (GObject      *gobject,\n'
-                     '  guint         prop_id,\n'
-                     '  GValue       *value,\n'
-                     '  GParamSpec   *pspec)\n'
-                     '{\n'
-                     '  %sObjectSkeleton *object = %sOBJECT_SKELETON (gobject);\n'
-                     '  GDBusInterface *interface;\n'
-                     '\n'
-                     '  switch (prop_id)\n'
-                     '    {\n'
-                     %(self.ns_lower, self.namespace, self.ns_upper))
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton_get_property (GObject      *gobject,\n'
+                           '  guint         prop_id,\n'
+                           '  GValue       *value,\n'
+                           '  GParamSpec   *pspec)\n'
+                           '{\n'
+                           '  %sObjectSkeleton *object = %sOBJECT_SKELETON (gobject);\n'
+                           '  GDBusInterface *interface;\n'
+                           '\n'
+                           '  switch (prop_id)\n'
+                           '    {\n'
+                           %(self.ns_lower, self.namespace, self.ns_upper))
         n = 1
         for i in self.ifaces:
-            self.c.write('    case %d:\n'
-                         '      interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object), "%s");\n'
-                         '      g_value_take_object (value, interface);\n'
-                         '      break;\n'
-                         '\n'
-                         %(n, i.name))
+            self.outfile.write('    case %d:\n'
+                               '      interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object), 
"%s");\n'
+                               '      g_value_take_object (value, interface);\n'
+                               '      break;\n'
+                               '\n'
+                               %(n, i.name))
             n += 1
-        self.c.write('    default:\n'
-                     '      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
-                     '      break;\n'
-                     '  }\n'
-                     '}\n'
-                     '\n'%())
-        self.c.write('static void\n'
-                     '%sobject_skeleton_class_init (%sObjectSkeletonClass *klass)\n'
-                     '{\n'
-                     '  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);\n'
-                     '\n'
-                     '  gobject_class->set_property = %sobject_skeleton_set_property;\n'
-                     '  gobject_class->get_property = %sobject_skeleton_get_property;\n'
-                     '\n'
-                     %(self.ns_lower, self.namespace, self.ns_lower, self.ns_lower))
+        self.outfile.write('    default:\n'
+                           '      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);\n'
+                           '      break;\n'
+                           '  }\n'
+                           '}\n'
+                           '\n'%())
+        self.outfile.write('static void\n'
+                           '%sobject_skeleton_class_init (%sObjectSkeletonClass *klass)\n'
+                           '{\n'
+                           '  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);\n'
+                           '\n'
+                           '  gobject_class->set_property = %sobject_skeleton_set_property;\n'
+                           '  gobject_class->get_property = %sobject_skeleton_get_property;\n'
+                           '\n'
+                           %(self.ns_lower, self.namespace, self.ns_lower, self.ns_lower))
         n = 1
         for i in self.ifaces:
-            self.c.write('  g_object_class_override_property (gobject_class, %d, "%s");'
-                         '\n'
-                         %(n, i.name_hyphen))
+            self.outfile.write('  g_object_class_override_property (gobject_class, %d, "%s");'
+                               '\n'
+                               %(n, i.name_hyphen))
             n += 1
-        self.c.write('}\n'
-                     '\n')
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write('}\n'
+                           '\n')
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_skeleton_new:\n'
                 ' * @object_path: An object path.\n'
@@ -3073,15 +3089,15 @@ class CodeGenerator:
                 ' * Returns: (transfer full): The skeleton object.\n'
                 ' */\n'
                 %(self.ns_lower), False))
-        self.c.write('%sObjectSkeleton *\n'
-                     '%sobject_skeleton_new (const gchar *object_path)\n'
-                     '{\n'
-                     '  g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);\n'
-                     '  return %sOBJECT_SKELETON (g_object_new (%sTYPE_OBJECT_SKELETON, "g-object-path", 
object_path, NULL));\n'
-                     '}\n'
-                     '\n'%(self.namespace, self.ns_lower, self.ns_upper, self.ns_upper))
+        self.outfile.write('%sObjectSkeleton *\n'
+                           '%sobject_skeleton_new (const gchar *object_path)\n'
+                           '{\n'
+                           '  g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);\n'
+                           '  return %sOBJECT_SKELETON (g_object_new (%sTYPE_OBJECT_SKELETON, 
"g-object-path", object_path, NULL));\n'
+                           '}\n'
+                           '\n'%(self.namespace, self.ns_lower, self.ns_upper, self.ns_upper))
         for i in self.ifaces:
-            self.c.write(self.docbook_gen.expand(
+            self.outfile.write(self.docbook_gen.expand(
                     '/**\n'
                     ' * %sobject_skeleton_set_%s:\n'
                     ' * @object: A #%sObjectSkeleton.\n'
@@ -3089,25 +3105,25 @@ class CodeGenerator:
                     ' *\n'
                     ' * Sets the #%s instance for the D-Bus interface #%s on @object.\n'
                     %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name, i.camel_name, 
i.name), False))
-            self.write_gtkdoc_deprecated_and_since_and_close(i, self.c, 0)
-            self.c.write ('void %sobject_skeleton_set_%s (%sObjectSkeleton *object, %s *interface_)\n'
-                          %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name))
-            self.c.write('{\n'
-                         '  g_object_set (G_OBJECT (object), "%s", interface_, NULL);\n'
-                         '}\n'
-                         '\n'
-                         %(i.name_hyphen))
-        self.c.write('\n')
+            self.write_gtkdoc_deprecated_and_since_and_close(i, self.outfile, 0)
+            self.outfile.write('void %sobject_skeleton_set_%s (%sObjectSkeleton *object, %s *interface_)\n'
+                               %(self.ns_lower, i.name_upper.lower(), self.namespace, i.camel_name))
+            self.outfile.write('{\n'
+                               '  g_object_set (G_OBJECT (object), "%s", interface_, NULL);\n'
+                               '}\n'
+                               '\n'
+                               %(i.name_hyphen))
+        self.outfile.write('\n')
 
 
     def generate_object_manager_client(self):
-        self.c.write('/* ------------------------------------------------------------------------\n'
-                     ' * Code for ObjectManager client\n'
-                     ' * ------------------------------------------------------------------------\n'
-                     ' */\n'
-                     '\n')
+        self.outfile.write('/* ------------------------------------------------------------------------\n'
+                           ' * Code for ObjectManager client\n'
+                           ' * ------------------------------------------------------------------------\n'
+                           ' */\n'
+                           '\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * SECTION:%sObjectManagerClient\n'
                 ' * @title: %sObjectManagerClient\n'
@@ -3116,45 +3132,45 @@ class CodeGenerator:
                 ' * This section contains a #GDBusObjectManagerClient that uses 
%sobject_manager_client_get_proxy_type() as the #GDBusProxyTypeFunc.\n'
                 ' */\n'
                 %(self.namespace, self.namespace, self.ns_lower), False))
-        self.c.write('\n')
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectManagerClient:\n'
                 ' *\n'
                 ' * The #%sObjectManagerClient structure contains only private data and should only be 
accessed using the provided API.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sObjectManagerClientClass:\n'
                 ' * @parent_class: The parent class.\n'
                 ' *\n'
                 ' * Class structure for #%sObjectManagerClient.\n'
                 %(self.namespace, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('\n')
+        self.outfile.write(' */\n')
+        self.outfile.write('\n')
 
         # class boilerplate
-        self.c.write('G_DEFINE_TYPE (%sObjectManagerClient, %sobject_manager_client, 
G_TYPE_DBUS_OBJECT_MANAGER_CLIENT)\n'
-                     '\n'
-                     %(self.namespace, self.ns_lower))
+        self.outfile.write('G_DEFINE_TYPE (%sObjectManagerClient, %sobject_manager_client, 
G_TYPE_DBUS_OBJECT_MANAGER_CLIENT)\n'
+                           '\n'
+                           %(self.namespace, self.ns_lower))
 
         # class boilerplate
-        self.c.write('static void\n'
-                     '%sobject_manager_client_init (%sObjectManagerClient *manager G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'%(self.ns_lower, self.namespace))
-        self.c.write('static void\n'
-                     '%sobject_manager_client_class_init (%sObjectManagerClientClass *klass G_GNUC_UNUSED)\n'
-                     '{\n'
-                     '}\n'
-                     '\n'%(self.ns_lower, self.namespace))
-
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write('static void\n'
+                           '%sobject_manager_client_init (%sObjectManagerClient *manager G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'%(self.ns_lower, self.namespace))
+        self.outfile.write('static void\n'
+                           '%sobject_manager_client_class_init (%sObjectManagerClientClass *klass 
G_GNUC_UNUSED)\n'
+                           '{\n'
+                           '}\n'
+                           '\n'%(self.ns_lower, self.namespace))
+
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_manager_client_get_proxy_type:\n'
                 ' * @manager: A #GDBusObjectManagerClient.\n'
@@ -3166,35 +3182,35 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: A #GDBusProxy derived #GType if @interface_name is not %%NULL, otherwise the 
#GType for #%sObjectProxy.\n'
                 %(self.ns_lower, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('GType\n'
-                     '%sobject_manager_client_get_proxy_type (GDBusObjectManagerClient *manager 
G_GNUC_UNUSED, const gchar *object_path G_GNUC_UNUSED, const gchar *interface_name, gpointer user_data 
G_GNUC_UNUSED)\n'
-                     '{\n'
-                     %(self.ns_lower))
-        self.c.write('  static gsize once_init_value = 0;\n'
-                     '  static GHashTable *lookup_hash;\n'
-                     '  GType ret;\n'
-                     '\n'
-                     '  if (interface_name == NULL)\n'
-                     '    return %sTYPE_OBJECT_PROXY;\n'
-                     '  if (g_once_init_enter (&once_init_value))\n'
-                     '    {\n'
-                     '      lookup_hash = g_hash_table_new (g_str_hash, g_str_equal);\n'
-                     %(self.ns_upper))
+        self.outfile.write(' */\n')
+        self.outfile.write('GType\n'
+                           '%sobject_manager_client_get_proxy_type (GDBusObjectManagerClient *manager 
G_GNUC_UNUSED, const gchar *object_path G_GNUC_UNUSED, const gchar *interface_name, gpointer user_data 
G_GNUC_UNUSED)\n'
+                           '{\n'
+                           %(self.ns_lower))
+        self.outfile.write('  static gsize once_init_value = 0;\n'
+                           '  static GHashTable *lookup_hash;\n'
+                           '  GType ret;\n'
+                           '\n'
+                           '  if (interface_name == NULL)\n'
+                           '    return %sTYPE_OBJECT_PROXY;\n'
+                           '  if (g_once_init_enter (&once_init_value))\n'
+                           '    {\n'
+                           '      lookup_hash = g_hash_table_new (g_str_hash, g_str_equal);\n'
+                           %(self.ns_upper))
         for i in self.ifaces:
-            self.c.write('      g_hash_table_insert (lookup_hash, (gpointer) "%s", GSIZE_TO_POINTER 
(%sTYPE_%s_PROXY));\n'
-                         %(i.name, i.ns_upper, i.name_upper))
-        self.c.write('      g_once_init_leave (&once_init_value, 1);\n'
-                     '    }\n')
-        self.c.write('  ret = (GType) GPOINTER_TO_SIZE (g_hash_table_lookup (lookup_hash, 
interface_name));\n'
-                     '  if (ret == (GType) 0)\n'
-                     '    ret = G_TYPE_DBUS_PROXY;\n')
-        self.c.write('  return ret;\n'
-                     '}\n'
-                     '\n')
+            self.outfile.write('      g_hash_table_insert (lookup_hash, (gpointer) "%s", GSIZE_TO_POINTER 
(%sTYPE_%s_PROXY));\n'
+                               %(i.name, i.ns_upper, i.name_upper))
+        self.outfile.write('      g_once_init_leave (&once_init_value, 1);\n'
+                           '    }\n')
+        self.outfile.write('  ret = (GType) GPOINTER_TO_SIZE (g_hash_table_lookup (lookup_hash, 
interface_name));\n'
+                           '  if (ret == (GType) 0)\n'
+                           '    ret = G_TYPE_DBUS_PROXY;\n')
+        self.outfile.write('  return ret;\n'
+                           '}\n'
+                           '\n')
 
         # constructors
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_manager_client_new:\n'
                 ' * @connection: A #GDBusConnection.\n'
@@ -3212,49 +3228,49 @@ class CodeGenerator:
                 ' *\n'
                 ' * See %sobject_manager_client_new_sync() for the synchronous, blocking version of this 
constructor.\n'
                 %(self.ns_lower, self.ns_lower, self.ns_lower, self.ns_lower), False))
-        self.c.write(' */\n')
-        self.c.write('void\n'
-                     '%sobject_manager_client_new (\n'
-                     '    GDBusConnection        *connection,\n'
-                     '    GDBusObjectManagerClientFlags  flags,\n'
-                     '    const gchar            *name,\n'
-                     '    const gchar            *object_path,\n'
-                     '    GCancellable           *cancellable,\n'
-                     '    GAsyncReadyCallback     callback,\n'
-                     '    gpointer                user_data)\n'
-                     '{\n'
-                     '  g_async_initable_new_async (%sTYPE_OBJECT_MANAGER_CLIENT, G_PRIORITY_DEFAULT, 
cancellable, callback, user_data, "flags", flags, "name", name, "connection", connection, "object-path", 
object_path, "get-proxy-type-func", %sobject_manager_client_get_proxy_type, NULL);\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_upper, self.ns_lower))
-        self.c.write('/**\n'
-                     ' * %sobject_manager_client_new_finish:\n'
-                     ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%sobject_manager_client_new().\n'
-                     ' * @error: Return location for error or %%NULL\n'
-                     ' *\n'
-                     ' * Finishes an operation started with %sobject_manager_client_new().\n'
-                     ' *\n'
-                     ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object 
manager client or %%NULL if @error is set.\n'
-                     %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace))
-        self.c.write(' */\n')
-        self.c.write('GDBusObjectManager *\n'
-                     '%sobject_manager_client_new_finish (\n'
-                     '    GAsyncResult        *res,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GObject *ret;\n'
-                     '  GObject *source_object;\n'
-                     '  source_object = g_async_result_get_source_object (res);\n'
-                     '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error);\n'
-                     '  g_object_unref (source_object);\n'
-                     '  if (ret != NULL)\n'
-                     '    return G_DBUS_OBJECT_MANAGER (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower))
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(' */\n')
+        self.outfile.write('void\n'
+                           '%sobject_manager_client_new (\n'
+                           '    GDBusConnection        *connection,\n'
+                           '    GDBusObjectManagerClientFlags  flags,\n'
+                           '    const gchar            *name,\n'
+                           '    const gchar            *object_path,\n'
+                           '    GCancellable           *cancellable,\n'
+                           '    GAsyncReadyCallback     callback,\n'
+                           '    gpointer                user_data)\n'
+                           '{\n'
+                           '  g_async_initable_new_async (%sTYPE_OBJECT_MANAGER_CLIENT, G_PRIORITY_DEFAULT, 
cancellable, callback, user_data, "flags", flags, "name", name, "connection", connection, "object-path", 
object_path, "get-proxy-type-func", %sobject_manager_client_get_proxy_type, NULL);\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_upper, self.ns_lower))
+        self.outfile.write('/**\n'
+                           ' * %sobject_manager_client_new_finish:\n'
+                           ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%sobject_manager_client_new().\n'
+                           ' * @error: Return location for error or %%NULL\n'
+                           ' *\n'
+                           ' * Finishes an operation started with %sobject_manager_client_new().\n'
+                           ' *\n'
+                           ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object 
manager client or %%NULL if @error is set.\n'
+                           %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace))
+        self.outfile.write(' */\n')
+        self.outfile.write('GDBusObjectManager *\n'
+                           '%sobject_manager_client_new_finish (\n'
+                           '    GAsyncResult        *res,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GObject *ret;\n'
+                           '  GObject *source_object;\n'
+                           '  source_object = g_async_result_get_source_object (res);\n'
+                           '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, 
error);\n'
+                           '  g_object_unref (source_object);\n'
+                           '  if (ret != NULL)\n'
+                           '    return G_DBUS_OBJECT_MANAGER (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower))
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_manager_client_new_sync:\n'
                 ' * @connection: A #GDBusConnection.\n'
@@ -3272,27 +3288,27 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object manager 
client or %%NULL if @error is set.\n'
                 %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('GDBusObjectManager *\n'
-                     '%sobject_manager_client_new_sync (\n'
-                     '    GDBusConnection        *connection,\n'
-                     '    GDBusObjectManagerClientFlags  flags,\n'
-                     '    const gchar            *name,\n'
-                     '    const gchar            *object_path,\n'
-                     '    GCancellable           *cancellable,\n'
-                     '    GError                **error)\n'
-                     '{\n'
-                     '  GInitable *ret;\n'
-                     '  ret = g_initable_new (%sTYPE_OBJECT_MANAGER_CLIENT, cancellable, error, "flags", 
flags, "name", name, "connection", connection, "object-path", object_path, "get-proxy-type-func", 
%sobject_manager_client_get_proxy_type, NULL);\n'
-                     '  if (ret != NULL)\n'
-                     '    return G_DBUS_OBJECT_MANAGER (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_upper, self.ns_lower))
-        self.c.write('\n')
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(' */\n')
+        self.outfile.write('GDBusObjectManager *\n'
+                           '%sobject_manager_client_new_sync (\n'
+                           '    GDBusConnection        *connection,\n'
+                           '    GDBusObjectManagerClientFlags  flags,\n'
+                           '    const gchar            *name,\n'
+                           '    const gchar            *object_path,\n'
+                           '    GCancellable           *cancellable,\n'
+                           '    GError                **error)\n'
+                           '{\n'
+                           '  GInitable *ret;\n'
+                           '  ret = g_initable_new (%sTYPE_OBJECT_MANAGER_CLIENT, cancellable, error, 
"flags", flags, "name", name, "connection", connection, "object-path", object_path, "get-proxy-type-func", 
%sobject_manager_client_get_proxy_type, NULL);\n'
+                           '  if (ret != NULL)\n'
+                           '    return G_DBUS_OBJECT_MANAGER (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_upper, self.ns_lower))
+        self.outfile.write('\n')
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_manager_client_new_for_bus:\n'
                 ' * @bus_type: A #GBusType.\n'
@@ -3310,49 +3326,49 @@ class CodeGenerator:
                 ' *\n'
                 ' * See %sobject_manager_client_new_for_bus_sync() for the synchronous, blocking version of 
this constructor.\n'
                 %(self.ns_lower, self.ns_lower, self.ns_lower, self.ns_lower), False))
-        self.c.write(' */\n')
-        self.c.write('void\n'
-                     '%sobject_manager_client_new_for_bus (\n'
-                     '    GBusType                bus_type,\n'
-                     '    GDBusObjectManagerClientFlags  flags,\n'
-                     '    const gchar            *name,\n'
-                     '    const gchar            *object_path,\n'
-                     '    GCancellable           *cancellable,\n'
-                     '    GAsyncReadyCallback     callback,\n'
-                     '    gpointer                user_data)\n'
-                     '{\n'
-                     '  g_async_initable_new_async (%sTYPE_OBJECT_MANAGER_CLIENT, G_PRIORITY_DEFAULT, 
cancellable, callback, user_data, "flags", flags, "name", name, "bus-type", bus_type, "object-path", 
object_path, "get-proxy-type-func", %sobject_manager_client_get_proxy_type, NULL);\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_upper, self.ns_lower))
-        self.c.write('/**\n'
-                     ' * %sobject_manager_client_new_for_bus_finish:\n'
-                     ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%sobject_manager_client_new_for_bus().\n'
-                     ' * @error: Return location for error or %%NULL\n'
-                     ' *\n'
-                     ' * Finishes an operation started with %sobject_manager_client_new_for_bus().\n'
-                     ' *\n'
-                     ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object 
manager client or %%NULL if @error is set.\n'
-                     %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace))
-        self.c.write(' */\n')
-        self.c.write('GDBusObjectManager *\n'
-                     '%sobject_manager_client_new_for_bus_finish (\n'
-                     '    GAsyncResult        *res,\n'
-                     '    GError             **error)\n'
-                     '{\n'
-                     '  GObject *ret;\n'
-                     '  GObject *source_object;\n'
-                     '  source_object = g_async_result_get_source_object (res);\n'
-                     '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, error);\n'
-                     '  g_object_unref (source_object);\n'
-                     '  if (ret != NULL)\n'
-                     '    return G_DBUS_OBJECT_MANAGER (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower))
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(' */\n')
+        self.outfile.write('void\n'
+                           '%sobject_manager_client_new_for_bus (\n'
+                           '    GBusType                bus_type,\n'
+                           '    GDBusObjectManagerClientFlags  flags,\n'
+                           '    const gchar            *name,\n'
+                           '    const gchar            *object_path,\n'
+                           '    GCancellable           *cancellable,\n'
+                           '    GAsyncReadyCallback     callback,\n'
+                           '    gpointer                user_data)\n'
+                           '{\n'
+                           '  g_async_initable_new_async (%sTYPE_OBJECT_MANAGER_CLIENT, G_PRIORITY_DEFAULT, 
cancellable, callback, user_data, "flags", flags, "name", name, "bus-type", bus_type, "object-path", 
object_path, "get-proxy-type-func", %sobject_manager_client_get_proxy_type, NULL);\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_upper, self.ns_lower))
+        self.outfile.write('/**\n'
+                           ' * %sobject_manager_client_new_for_bus_finish:\n'
+                           ' * @res: The #GAsyncResult obtained from the #GAsyncReadyCallback passed to 
%sobject_manager_client_new_for_bus().\n'
+                           ' * @error: Return location for error or %%NULL\n'
+                           ' *\n'
+                           ' * Finishes an operation started with %sobject_manager_client_new_for_bus().\n'
+                           ' *\n'
+                           ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object 
manager client or %%NULL if @error is set.\n'
+                           %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace))
+        self.outfile.write(' */\n')
+        self.outfile.write('GDBusObjectManager *\n'
+                           '%sobject_manager_client_new_for_bus_finish (\n'
+                           '    GAsyncResult        *res,\n'
+                           '    GError             **error)\n'
+                           '{\n'
+                           '  GObject *ret;\n'
+                           '  GObject *source_object;\n'
+                           '  source_object = g_async_result_get_source_object (res);\n'
+                           '  ret = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, 
error);\n'
+                           '  g_object_unref (source_object);\n'
+                           '  if (ret != NULL)\n'
+                           '    return G_DBUS_OBJECT_MANAGER (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower))
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * %sobject_manager_client_new_for_bus_sync:\n'
                 ' * @bus_type: A #GBusType.\n'
@@ -3370,26 +3386,26 @@ class CodeGenerator:
                 ' *\n'
                 ' * Returns: (transfer full) (type %sObjectManagerClient): The constructed object manager 
client or %%NULL if @error is set.\n'
                 %(self.ns_lower, self.ns_lower, self.ns_lower, self.namespace), False))
-        self.c.write(' */\n')
-        self.c.write('GDBusObjectManager *\n'
-                     '%sobject_manager_client_new_for_bus_sync (\n'
-                     '    GBusType                bus_type,\n'
-                     '    GDBusObjectManagerClientFlags  flags,\n'
-                     '    const gchar            *name,\n'
-                     '    const gchar            *object_path,\n'
-                     '    GCancellable           *cancellable,\n'
-                     '    GError                **error)\n'
-                     '{\n'
-                     '  GInitable *ret;\n'
-                     '  ret = g_initable_new (%sTYPE_OBJECT_MANAGER_CLIENT, cancellable, error, "flags", 
flags, "name", name, "bus-type", bus_type, "object-path", object_path, "get-proxy-type-func", 
%sobject_manager_client_get_proxy_type, NULL);\n'
-                     '  if (ret != NULL)\n'
-                     '    return G_DBUS_OBJECT_MANAGER (ret);\n'
-                     '  else\n'
-                     '    return NULL;\n'
-                     '}\n'
-                     '\n'
-                     %(self.ns_lower, self.ns_upper, self.ns_lower))
-        self.c.write('\n')
+        self.outfile.write(' */\n')
+        self.outfile.write('GDBusObjectManager *\n'
+                           '%sobject_manager_client_new_for_bus_sync (\n'
+                           '    GBusType                bus_type,\n'
+                           '    GDBusObjectManagerClientFlags  flags,\n'
+                           '    const gchar            *name,\n'
+                           '    const gchar            *object_path,\n'
+                           '    GCancellable           *cancellable,\n'
+                           '    GError                **error)\n'
+                           '{\n'
+                           '  GInitable *ret;\n'
+                           '  ret = g_initable_new (%sTYPE_OBJECT_MANAGER_CLIENT, cancellable, error, 
"flags", flags, "name", name, "bus-type", bus_type, "object-path", object_path, "get-proxy-type-func", 
%sobject_manager_client_get_proxy_type, NULL);\n'
+                           '  if (ret != NULL)\n'
+                           '    return G_DBUS_OBJECT_MANAGER (ret);\n'
+                           '  else\n'
+                           '    return NULL;\n'
+                           '}\n'
+                           '\n'
+                           %(self.ns_lower, self.ns_upper, self.ns_lower))
+        self.outfile.write('\n')
 
     # ---------------------------------------------------------------------------------------------------
 
@@ -3418,13 +3434,13 @@ class CodeGenerator:
     # ---------------------------------------------------------------------------------------------------
 
     def generate_interface_intro(self, i):
-        self.c.write('/* ------------------------------------------------------------------------\n'
-                     ' * Code for interface %s\n'
-                     ' * ------------------------------------------------------------------------\n'
-                     ' */\n'
-                     '\n'%(i.name))
+        self.outfile.write('/* ------------------------------------------------------------------------\n'
+                           ' * Code for interface %s\n'
+                           ' * ------------------------------------------------------------------------\n'
+                           ' */\n'
+                           '\n'%(i.name))
 
-        self.c.write(self.docbook_gen.expand(
+        self.outfile.write(self.docbook_gen.expand(
                 '/**\n'
                 ' * SECTION:%s\n'
                 ' * @title: %s\n'
@@ -3433,13 +3449,9 @@ class CodeGenerator:
                 ' * This section contains code for working with the #%s D-Bus interface in C.\n'
                 ' */\n'
                 %(i.camel_name, i.camel_name, i.name, i.name), False))
-        self.c.write('\n')
+        self.outfile.write('\n')
 
     def generate(self):
-        self.generate_header_preamble()
-        self.declare_types()
-        self.generate_header_postamble()
-
         self.generate_body_preamble()
         for i in self.ifaces:
             self.generate_interface_intro(i)
diff --git a/gio/gdbus-2.0/codegen/codegen_main.py b/gio/gdbus-2.0/codegen/codegen_main.py
index 8f69c78..1fb749b 100755
--- a/gio/gdbus-2.0/codegen/codegen_main.py
+++ b/gio/gdbus-2.0/codegen/codegen_main.py
@@ -197,20 +197,24 @@ def codegen_main():
     c_code = args.generate_c_code
     if c_code:
         header_name = c_code + '.h'
-        h = open(path.join(outdir, header_name), 'w')
-        c = open(path.join(outdir, c_code + '.c'), 'w')
-        gen = codegen.CodeGenerator(all_ifaces,
-                                    args.c_namespace,
-                                    args.interface_prefix,
-                                    args.c_generate_object_manager,
-                                    args.c_generate_autocleanup,
-                                    docbook_gen,
-                                    h, c,
-                                    header_name,
-                                    args.pragma_once)
-        ret = gen.generate()
-        h.close()
-        c.close()
+        with open(path.join(outdir, header_name), 'w') as outfile:
+            gen = codegen.HeaderCodeGenerator(all_ifaces,
+                                              args.c_namespace,
+                                              args.c_generate_object_manager,
+                                              args.c_generate_autocleanup,
+                                              header_name,
+                                              args.pragma_once,
+                                              outfile)
+            gen.generate()
+
+        with open(path.join(outdir, c_code + '.c'), 'w') as outfile:
+            gen = codegen.CodeGenerator(all_ifaces,
+                                        args.c_namespace,
+                                        args.c_generate_object_manager,
+                                        header_name,
+                                        docbook_gen,
+                                        outfile)
+            gen.generate()
 
     sys.exit(0)
 


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