[empathy] Reimplement the singleton in the constructor

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit f24134c23869a0a1749a7b8f8bc2347011050a4f
Author: Pierre-Luc Beaudoin <pierre-luc beaudoin collabora co uk>
Date:   Sun May 31 11:53:18 2009 -0400

    Reimplement the singleton in the constructor
---
 libempathy-gtk/empathy-location-manager.c |   37 ++++++++++++++++++++++-------
 libempathy-gtk/empathy-location-manager.h |    2 +-
 src/empathy.c                             |    2 +-
 3 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/libempathy-gtk/empathy-location-manager.c b/libempathy-gtk/empathy-location-manager.c
index aab598b..3da7f75 100644
--- a/libempathy-gtk/empathy-location-manager.c
+++ b/libempathy-gtk/empathy-location-manager.c
@@ -46,6 +46,7 @@
 
 /* Seconds before updating the location */
 #define TIMEOUT 10
+static EmpathyLocationManager *location_manager = NULL;
 
 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyLocationManager)
 typedef struct {
@@ -100,6 +101,29 @@ static gboolean publish_on_idle (gpointer user_data);
 
 G_DEFINE_TYPE (EmpathyLocationManager, empathy_location_manager, G_TYPE_OBJECT);
 
+static GObject *
+location_manager_constructor (GType type,
+    guint n_construct_params,
+    GObjectConstructParam *construct_params)
+{
+  GObject *retval;
+
+  if (location_manager == NULL)
+    {
+      retval = G_OBJECT_CLASS (empathy_location_manager_parent_class)->constructor
+          (type, n_construct_params, construct_params);
+
+      location_manager = EMPATHY_LOCATION_MANAGER (retval);
+      g_object_add_weak_pointer (retval, (gpointer) &location_manager);
+    }
+  else
+    {
+      retval = g_object_ref (location_manager);
+    }
+
+  return retval;
+}
+
 static void
 empathy_location_manager_class_init (EmpathyLocationManagerClass *class)
 {
@@ -107,6 +131,7 @@ empathy_location_manager_class_init (EmpathyLocationManagerClass *class)
 
   object_class = G_OBJECT_CLASS (class);
 
+  object_class->constructor = location_manager_constructor;
   object_class->dispose = location_manager_dispose;
   object_class->get_property = location_manager_get_property;
   object_class->set_property = location_manager_set_property;
@@ -314,16 +339,10 @@ location_manager_set_property (GObject *object,
 }
 
 EmpathyLocationManager *
-empathy_location_manager_dup_default (void)
+empathy_location_manager_dup_singleton (void)
 {
-  static EmpathyLocationManager *singleton = NULL;
-  if (singleton == NULL)
-    {
-      singleton = g_object_new (EMPATHY_TYPE_LOCATION_MANAGER, NULL);
-      g_object_add_weak_pointer (G_OBJECT (singleton), (gpointer *)&singleton);
-    }
-
-  return g_object_ref (singleton);
+  return EMPATHY_LOCATION_MANAGER (g_object_new (EMPATHY_TYPE_LOCATION_MANAGER,
+      NULL));
 }
 
 static void
diff --git a/libempathy-gtk/empathy-location-manager.h b/libempathy-gtk/empathy-location-manager.h
index cb12791..092ef08 100644
--- a/libempathy-gtk/empathy-location-manager.h
+++ b/libempathy-gtk/empathy-location-manager.h
@@ -50,7 +50,7 @@ struct _EmpathyLocationManagerClass
 };
 
 GType empathy_location_manager_get_type (void) G_GNUC_CONST;
-EmpathyLocationManager * empathy_location_manager_dup_default (void);
+EmpathyLocationManager * empathy_location_manager_dup_singleton (void);
 
 G_END_DECLS
 
diff --git a/src/empathy.c b/src/empathy.c
index 617543a..cc9103c 100644
--- a/src/empathy.c
+++ b/src/empathy.c
@@ -588,7 +588,7 @@ main (int argc, char *argv[])
 
 	/* Location mananger */
 #if HAVE_GEOCLUE
-	location_manager = empathy_location_manager_dup_default ();
+	location_manager = empathy_location_manager_dup_singleton ();
 #endif
 
 	gtk_main ();