* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
- * Public License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* WARNING:
+ *
+ * This file is INSTALLED and other projects (outside of glib)
+ * #include its contents.
*/
#ifndef __G_OBJECT_NOTIFY_QUEUE_H__
guint16 freeze_count;
};
+G_LOCK_DEFINE_STATIC(notify_lock);
+
/* --- functions --- */
static void
g_object_notify_queue_free (gpointer data)
{
GObjectNotifyQueue *nqueue;
+ G_LOCK(notify_lock);
nqueue = g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
if (!nqueue)
{
G_OBJECT_TYPE_NAME (object), object);
else
nqueue->freeze_count++;
+ G_UNLOCK(notify_lock);
return nqueue;
}
guint n_pspecs = 0;
g_return_if_fail (nqueue->freeze_count > 0);
+ g_return_if_fail (g_atomic_int_get(&object->ref_count) > 0);
+
+ G_LOCK(notify_lock);
+
+ /* Just make sure we never get into some nasty race condition */
+ if (G_UNLIKELY(nqueue->freeze_count == 0)) {
+ G_UNLOCK(notify_lock);
+ g_warning ("%s: property-changed notification for %s(%p) is not frozen",
+ G_STRFUNC, G_OBJECT_TYPE_NAME (object), object);
+ return;
+ }
nqueue->freeze_count--;
- if (nqueue->freeze_count)
+ if (nqueue->freeze_count) {
+ G_UNLOCK(notify_lock);
return;
- g_return_if_fail (object->ref_count > 0);
+ }
pspecs = nqueue->n_pspecs > 16 ? free_me = g_new (GParamSpec*, nqueue->n_pspecs) : pspecs_mem;
- /* set first entry to NULL since it's checked unconditionally */
- pspecs[0] = NULL;
+
for (slist = nqueue->pspecs; slist; slist = slist->next)
{
- GParamSpec *pspec = slist->data;
- guint i = 0;
-
- /* dedup, make pspecs in the list unique */
- redo_dedup_check:
- if (pspecs[i] == pspec)
- continue;
- if (++i < n_pspecs)
- goto redo_dedup_check;
-
- pspecs[n_pspecs++] = pspec;
+ pspecs[n_pspecs++] = slist->data;
}
g_datalist_id_set_data (&object->qdata, context->quark_notify_queue, NULL);
+ G_UNLOCK(notify_lock);
+
if (n_pspecs)
context->dispatcher (object, n_pspecs, pspecs);
g_free (free_me);
}
static inline void
+g_object_notify_queue_clear (GObject *object,
+ GObjectNotifyQueue *nqueue)
+{
+ g_return_if_fail (nqueue->freeze_count > 0);
+
+ G_LOCK(notify_lock);
+
+ g_slist_free (nqueue->pspecs);
+ nqueue->pspecs = NULL;
+ nqueue->n_pspecs = 0;
+
+ G_UNLOCK(notify_lock);
+}
+
+static inline void
g_object_notify_queue_add (GObject *object,
GObjectNotifyQueue *nqueue,
GParamSpec *pspec)
{
GParamSpec *redirect;
+ G_LOCK(notify_lock);
+
g_return_if_fail (nqueue->n_pspecs < 65535);
redirect = g_param_spec_get_redirect_target (pspec);
pspec = redirect;
/* we do the deduping in _thaw */
- nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
- nqueue->n_pspecs++;
+ if (g_slist_find (nqueue->pspecs, pspec) == NULL)
+ {
+ nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
+ nqueue->n_pspecs++;
+ }
+
+ G_UNLOCK(notify_lock);
}
}
+/* NB: This function is not threadsafe, do not ever use it if
+ * you need a threadsafe notify queue.
+ * Use g_object_notify_queue_freeze() to acquire the queue and
+ * g_object_notify_queue_thaw() after you are done instead.
+ */
static inline GObjectNotifyQueue*
g_object_notify_queue_from_object (GObject *object,
- GObjectNotifyContext *context)
+ GObjectNotifyContext *context)
{
return g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
}
-
G_END_DECLS
#endif /* __G_OBJECT_NOTIFY_QUEUE_H__ */