+/* GObject - GLib Type, Object, Parameter and Signal Library
+ * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * 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.
+ */
+#ifndef __G_NOTIFY_H__
+#define __G_NOTIFY_H__
+
+#include <gobject/gobject.h>
+
+G_BEGIN_DECLS
+
+
+/* --- typedefs --- */
+typedef struct _GObjectNotifyContext GObjectNotifyContext;
+typedef struct _GObjectNotifyQueue GObjectNotifyQueue;
+typedef void (*GObjectNotifyQueueDispatcher) (GObject *object,
+ guint n_pspecs,
+ GParamSpec **pspecs);
+
+
+/* --- structures --- */
+struct _GObjectNotifyContext
+{
+ GQuark quark_notify_queue;
+ GObjectNotifyQueueDispatcher dispatcher;
+ GTrashStack *nqueue_trash;
+};
+struct _GObjectNotifyQueue
+{
+ GObjectNotifyContext *context;
+ GSList *pspecs;
+ guint n_pspecs;
+ guint freeze_count;
+};
+
+
+/* --- functions --- */
+static void
+g_object_notify_queue_free (gpointer data)
+{
+ GObjectNotifyQueue *nqueue = data;
+
+ g_slist_free (nqueue->pspecs);
+ g_trash_stack_push (&nqueue->context->nqueue_trash, nqueue);
+}
+
+static inline GObjectNotifyQueue*
+g_object_notify_queue_freeze (GObject *object,
+ GObjectNotifyContext *context)
+{
+ GObjectNotifyQueue *nqueue;
+
+ nqueue = g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
+ if (!nqueue)
+ {
+ nqueue = g_trash_stack_pop (&context->nqueue_trash);
+ if (!nqueue)
+ {
+ guint i;
+
+ nqueue = g_new (GObjectNotifyQueue, 16);
+ for (i = 0; i < 15; i++)
+ g_trash_stack_push (&context->nqueue_trash, nqueue++);
+ }
+ memset (nqueue, 0, sizeof (*nqueue));
+ nqueue->context = context;
+ g_datalist_id_set_data_full (&object->qdata, context->quark_notify_queue,
+ nqueue, g_object_notify_queue_free);
+ }
+ nqueue->freeze_count++;
+
+ return nqueue;
+}
+
+static inline void
+g_object_notify_queue_thaw (GObject *object,
+ GObjectNotifyQueue *nqueue)
+{
+ GObjectNotifyContext *context = nqueue->context;
+ GParamSpec *pspecs_mem[16], **pspecs, **free_me = NULL;
+ GSList *slist;
+ guint n_pspecs = 0;
+
+ g_return_if_fail (nqueue->freeze_count > 0);
+
+ nqueue->freeze_count--;
+ if (nqueue->freeze_count)
+ return;
+ g_return_if_fail (object->ref_count > 0);
+
+ pspecs = nqueue->n_pspecs > 16 ? free_me = g_new (GParamSpec*, nqueue->n_pspecs) : pspecs_mem;
+ for (slist = nqueue->pspecs; slist; slist = slist->next)
+ {
+ GParamSpec *pspec = slist->data;
+ gint 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;
+ }
+ g_datalist_id_set_data (&object->qdata, context->quark_notify_queue, NULL);
+
+ 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_slist_free (nqueue->pspecs);
+ nqueue->pspecs = NULL;
+ nqueue->n_pspecs = 0;
+}
+
+static inline void
+g_object_notify_queue_add (GObject *object,
+ GObjectNotifyQueue *nqueue,
+ GParamSpec *pspec)
+{
+ if (pspec->flags & G_PARAM_READABLE)
+ {
+ /* we do the deduping in _thaw */
+ nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
+ nqueue->n_pspecs++;
+ }
+}
+
+static inline GObjectNotifyQueue*
+g_object_notify_queue_from_object (GObject *object,
+ GObjectNotifyContext *context)
+{
+ return g_datalist_id_get_data (&object->qdata, context->quark_notify_queue);
+}
+
+
+G_END_DECLS
+
+#endif /* __G_OBJECT_H__ */