[pygobject] Move PyGIDeprecationWarning to C for shared Python/C usage

[Simon Feltman <sfeltman src gnome org>]

commit 077aefed8566adcb99d7570f52fe09c74c2098e5
Author: Simon Feltman <sfeltman src gnome org>
Date:   Sat Jul 6 13:34:53 2013 -0700

    Move PyGIDeprecationWarning to C for shared Python/C usage
    
    https://bugzilla.gnome.org/show_bug.cgi?id=688081

 gi/__init__.py |   19 ++++---------------
 gi/gimodule.c  |   18 ++++++++++++++++++
 gi/pygi.h      |    2 ++
 3 files changed, 24 insertions(+), 15 deletions(-)
---
diff --git a/gi/__init__.py b/gi/__init__.py
index e8c12db..0645d44 100644
--- a/gi/__init__.py
+++ b/gi/__init__.py
@@ -24,7 +24,9 @@ from __future__ import absolute_import
 from pkgutil import extend_path
 __path__ = extend_path(__path__, __name__)
 
-from ._gi import _API, Repository
+from ._gi import _API
+from ._gi import Repository
+from ._gi import PyGIDeprecationWarning
 
 # Force loading the GObject typelib so we have available the wrappers for
 # base classes such as GInitiallyUnowned
@@ -32,6 +34,7 @@ import gi._gobject
 gi  # pyflakes
 
 _API = _API  # pyflakes
+PyGIDeprecationWarning = PyGIDeprecationWarning
 
 import os
 
@@ -81,17 +84,3 @@ def require_version(namespace, version):
 
 def get_required_version(namespace):
     return _versions.get(namespace, None)
-
-
-# Use RuntimeWarning as the base class of PyGIDeprecationWarning
-# for unstable (odd minor version) and use DeprecationWarning for
-# stable (even minor version). This is so PyGObject deprecations
-# behave the same as regular Python deprecations in stable releases.
-if version_info[1] % 2:
-    _DeprecationWarningBase = RuntimeWarning
-else:
-    _DeprecationWarningBase = DeprecationWarning
-
-
-class PyGIDeprecationWarning(_DeprecationWarningBase):
-    pass
diff --git a/gi/gimodule.c b/gi/gimodule.c
index 5b6bc14..12dfb36 100644
--- a/gi/gimodule.c
+++ b/gi/gimodule.c
@@ -28,6 +28,8 @@
 #include <pygobject.h>
 #include <pyglib-python-compat.h>
 
+PyObject *PyGIDeprecationWarning;
+
 static PyObject *
 _wrap_pyg_enum_add (PyObject *self,
                     PyObject *args,
@@ -641,6 +643,22 @@ PYGLIB_MODULE_START(_gi, "_gi")
     _pygi_ccallback_register_types (module);
     _pygi_argument_init();
 
+    /* Use RuntimeWarning as the base class of PyGIDeprecationWarning
+     * for unstable (odd minor version) and use DeprecationWarning for
+     * stable (even minor version). This is so PyGObject deprecations
+     * behave the same as regular Python deprecations in stable releases.
+     */
+#if PYGOBJECT_MINOR_VERSION % 2
+    PyGIDeprecationWarning = PyErr_NewException("gi.PyGIDeprecationWarning",
+                                                PyExc_RuntimeWarning, NULL);
+#else
+    PyGIDeprecationWarning = PyErr_NewException("gi.PyGIDeprecationWarning",
+                                                PyExc_DeprecationWarning, NULL);
+#endif
+
+    Py_INCREF(PyGIDeprecationWarning);
+    PyModule_AddObject(module, "PyGIDeprecationWarning", PyGIDeprecationWarning);
+
     api = PYGLIB_CPointer_WrapPointer ( (void *) &CAPI, "gi._API");
     if (api == NULL) {
         return PYGLIB_MODULE_ERROR_RETURN;
diff --git a/gi/pygi.h b/gi/pygi.h
index f3f0c81..10da504 100644
--- a/gi/pygi.h
+++ b/gi/pygi.h
@@ -32,6 +32,8 @@
 #include <girepository.h>
 #include "pygi-cache.h"
 
+extern PyObject *PyGIDeprecationWarning;
+
 typedef struct {
     PyObject_HEAD
     GIRepository *repository;