gst: Use G_DEFINE_TYPE and don't call g_thread_init() from class_init

class_init is too late for calling g_thread_init() as g_thread_init()
needs to be called before any GObject function.

gst/gstbus.c

@@ -99,37 +99,12 @@ static guint gst_bus_signals[LAST_SIGNAL] = { 0 };
 struct _GstBusPrivate
 {
   guint num_sync_message_emitters;
-
   GCond *queue_cond;
-
   GSource *watch_id;
-
   GMainContext *main_context;
 };
 
-GType
-gst_bus_get_type (void)
-{
-  static GType bus_type = 0;
-
-  if (G_UNLIKELY (bus_type == 0)) {
-    static const GTypeInfo bus_info = {
-      sizeof (GstBusClass),
-      NULL,
-      NULL,
-      (GClassInitFunc) gst_bus_class_init,
-      NULL,
-      NULL,
-      sizeof (GstBus),
-      0,
-      (GInstanceInitFunc) gst_bus_init,
-      NULL
-    };
-
-    bus_type = g_type_register_static (GST_TYPE_OBJECT, "GstBus", &bus_info, 0);
-  }
-  return bus_type;
-}
+G_DEFINE_TYPE (GstBus, gst_bus, GST_TYPE_OBJECT);
 
 /* fixme: do something about this */
 static void
@@ -162,15 +137,10 @@ marshal_VOID__MINIOBJECT (GClosure * closure, GValue * return_value,
 static void
 gst_bus_class_init (GstBusClass * klass)
 {
-  GObjectClass *gobject_class;
-
-  gobject_class = (GObjectClass *) klass;
+  GObjectClass *gobject_class = (GObjectClass *) klass;
 
   parent_class = g_type_class_peek_parent (klass);
 
-  if (!g_thread_supported ())
-    g_thread_init (NULL);
-
   gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_bus_dispose);
 
   /**
@@ -227,9 +197,7 @@ gst_bus_init (GstBus * bus)
 static void
 gst_bus_dispose (GObject * object)
 {
-  GstBus *bus;
-
-  bus = GST_BUS (object);
+  GstBus *bus = GST_BUS (object);
 
   if (bus->queue) {
     GstMessage *message;

gst/gstclock.c

@@ -523,43 +523,15 @@ gst_clock_id_unschedule (GstClockID id)
 /**
  * GstClock abstract base class implementation
  */
-GType
-gst_clock_get_type (void)
-{
-  static GType clock_type = 0;
-
-  if (G_UNLIKELY (clock_type == 0)) {
-    static const GTypeInfo clock_info = {
-      sizeof (GstClockClass),
-      NULL,
-      NULL,
-      (GClassInitFunc) gst_clock_class_init,
-      NULL,
-      NULL,
-      sizeof (GstClock),
-      0,
-      (GInstanceInitFunc) gst_clock_init,
-      NULL
-    };
-
-    clock_type = g_type_register_static (GST_TYPE_OBJECT, "GstClock",
-        &clock_info, G_TYPE_FLAG_ABSTRACT);
-  }
-  return clock_type;
-}
+G_DEFINE_TYPE (GstClock, gst_clock, GST_TYPE_OBJECT);
 
 static void
 gst_clock_class_init (GstClockClass * klass)
 {
-  GObjectClass *gobject_class;
-
-  gobject_class = G_OBJECT_CLASS (klass);
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 
   parent_class = g_type_class_peek_parent (klass);
 
-  if (!g_thread_supported ())
-    g_thread_init (NULL);
-
 #ifndef GST_DISABLE_TRACE
   _gst_clock_entry_trace =
       gst_alloc_trace_register (GST_CLOCK_ENTRY_TRACE_NAME);