[dconf] writer: add @type argument to constructor

[Ryan Lortie <ryanl src gnome org>]

commit 92c6f91b41c1e0a26c9ab52640201930aa6f3e88
Author: Ryan Lortie <desrt desrt ca>
Date:   Mon Jan 7 18:30:47 2013 -0500

    writer: add @type argument to constructor
    
    dconf_writer_new() now takes a type so we can create subtypes of
    DConfWriter.

 service/dconf-service.c |    2 +-
 service/dconf-writer.c  |    7 +++++--
 service/dconf-writer.h  |    3 ++-
 3 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/service/dconf-service.c b/service/dconf-service.c
index f4b2515..63ffff6 100644
--- a/service/dconf-service.c
+++ b/service/dconf-service.c
@@ -110,7 +110,7 @@ dconf_service_get_writer (DConfService    *service,
       GError *error = NULL;
       gchar *object_path;
 
-      writer = dconf_writer_new (name);
+      writer = dconf_writer_new (DCONF_TYPE_WRITER, name);
       g_hash_table_insert (service->writers, g_strdup (name), writer);
       object_path = g_strjoin ("/", base_path, name, NULL);
       g_dbus_interface_skeleton_export (writer, connection, object_path, &error);
diff --git a/service/dconf-writer.c b/service/dconf-writer.c
index 05519a1..46aaf2d 100644
--- a/service/dconf-writer.c
+++ b/service/dconf-writer.c
@@ -325,7 +325,10 @@ dconf_writer_get_name (DConfWriter *writer)
 }
 
 GDBusInterfaceSkeleton *
-dconf_writer_new (const gchar *name)
+dconf_writer_new (GType        type,
+                  const gchar *name)
 {
-  return g_object_new (DCONF_TYPE_WRITER, "name", name, NULL);
+  g_return_val_if_fail (g_type_is_a (type, DCONF_TYPE_WRITER), NULL);
+
+  return g_object_new (type, "name", name, NULL);
 }
diff --git a/service/dconf-writer.h b/service/dconf-writer.h
index eb00422..7783c94 100644
--- a/service/dconf-writer.h
+++ b/service/dconf-writer.h
@@ -64,6 +64,7 @@ struct _DConfWriter
   DConfWriterPrivate *priv;
 };
 
-GDBusInterfaceSkeleton *dconf_writer_new                                (const gchar *filename);
+GDBusInterfaceSkeleton *dconf_writer_new                                (GType        type,
+                                                                         const gchar *name);
 
 #endif /* __dconf_writer_h__ */