New basic implementation of GTypePlugin interface as a GObject.

Sun Nov  5 13:21:28 2000  Owen Taylor  <otaylor@redhat.com>

	* Makefile.am gtypemodule.[ch]: New basic implementation of
	GTypePlugin interface as a GObject. Dynamically loaded modules can
	register any number of types and interface on the module.

gobject/ChangeLog

@@ -1,3 +1,9 @@
+Sun Nov  5 13:21:28 2000  Owen Taylor  <otaylor@redhat.com>
+
+	* Makefile.am gtypemodule.[ch]: New basic implementation of
+	GTypePlugin interface as a GObject. Dynamically loaded modules can
+	register any number of types and interface on the module.
+
 Sun Nov  5 10:25:40 2000  Owen Taylor  <otaylor@redhat.com>
 
 	* gsignal.c (handlers_find): When appending handlers and

gobject/Makefile.am

@@ -32,6 +32,7 @@ gobject_public_h_sources = @STRIP_BEGIN@ \
 	gparamspecs.h \
 	gsignal.h \
 	gtype.h \
+	gtypemodule.h \
 	gtypeplugin.h \
 	gvalue.h \
 	gvaluecollector.h \
@@ -52,6 +53,7 @@ gobject_c_sources = @STRIP_BEGIN@ \
 	gparamspecs.c \
 	gsignal.c \
 	gtype.c \
+	gtypemodule.c \
 	gtypeplugin.c \
 	gvalue.c \
 	gvaluetypes.c \

gobject/gtype.c

@@ -1910,6 +1910,32 @@ g_type_get_plugin (GType type)
   return node ? node->plugin : NULL;
 }
 
+GTypePlugin*
+g_type_interface_get_plugin (GType instance_type,
+			     GType interface_type)
+{
+  TypeNode *node = LOOKUP_TYPE_NODE (instance_type);  
+  TypeNode *iface = LOOKUP_TYPE_NODE (interface_type);
+  IFaceHolder *iholder;
+
+  g_return_val_if_fail (node == NULL, NULL);
+  g_return_val_if_fail (iface == NULL, NULL);
+  g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
+  
+  iholder = iface->private.iface_conformants;
+  
+  while (iholder && iholder->instance_type != instance_type)
+    iholder = iholder->next;
+
+  if (!iholder)
+    {
+      g_warning (G_STRLOC ": Attempt to look up plugin for invalid instance/interface type pair.");
+      return NULL;
+    }
+
+  return iholder->plugin;
+}
+
 GType
 g_type_fundamental_last (void)
 {

gobject/gtype.h

@@ -295,6 +295,9 @@ void  g_type_add_interface_dynamic (GType                       instance_type,
 
 /* --- protected (for fundamental type implementations) --- */
 GTypePlugin*	 g_type_get_plugin		(GType		     type);
+GTypePlugin*	 g_type_interface_get_plugin	(GType		     instance_type,
+						 GType               implementation_type);
+
 GType		 g_type_fundamental_last	(void);
 gboolean         g_type_check_flags             (GType               type,
 						 guint               flags);