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added floating reference count. g_object_is_floating():

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Wed Nov 23 18:01:46 2005  Tim Janik  <timj@imendio.com>

        * gobject.[hc]: added floating reference count.
        g_object_is_floating():
        g_object_ref_sink(): new functions to deal with floating references.
        g_object_force_floating(): new funciton for object implementations
        to set the floating flag.

        * gobject.c (g_object_init): make objects initially floating.

Wed Nov 23 17:58:13 2005  Tim Janik  <timj@gtk.org>

        * gparam.[hc]: added g_param_spec_ref_sink().
This commit is contained in:
Tim Janik
2005-11-23 17:54:41 +00:00
committed by Tim Janik
parent 311094aeab
commit 6e5f465924
6 changed files with 78 additions and 2 deletions
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45
gobject/gobject.c
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@@ -42,7 +42,8 @@
#define OBJECT_HAS_TOGGLE_REF_FLAG 0x1
#define OBJECT_HAS_TOGGLE_REF(object) \
((G_DATALIST_GET_FLAGS(&(object)->qdata) & OBJECT_HAS_TOGGLE_REF_FLAG) != 0)
((G_DATALIST_GET_FLAGS (&(object)->qdata) & OBJECT_HAS_TOGGLE_REF_FLAG) != 0)
#define OBJECT_FLOATING_FLAG 0x2
/* --- signals --- */
@@ -472,6 +473,7 @@ g_object_init (GObject *object)
{
object->ref_count = 1;
g_datalist_init (&object->qdata);
g_object_force_floating (object);
/* freeze object's notification queue, g_object_newv() preserves pairedness */
g_object_notify_queue_freeze (object, &property_notify_context);
@@ -1518,6 +1520,47 @@ g_object_remove_weak_pointer (GObject *object,
weak_pointer_location);
}
gboolean
g_object_is_floating (gpointer _object)
{
GObject *object = _object;
g_return_val_if_fail (G_IS_OBJECT (object), FALSE);
return ((gsize) g_atomic_pointer_get (&object->qdata) & OBJECT_FLOATING_FLAG) != 0;
}
gpointer
g_object_ref_sink (gpointer _object)
{
GObject *object = _object;
gpointer oldvalue;
g_return_val_if_fail (G_IS_OBJECT (object), object);
g_return_val_if_fail (object->ref_count >= 1, object);
g_object_ref (object);
do
{
oldvalue = g_atomic_pointer_get (&object->qdata);
}
while (!g_atomic_pointer_compare_and_exchange ((void**) &object->qdata, oldvalue,
(gpointer) ((gsize) oldvalue & ~(gsize) OBJECT_FLOATING_FLAG)));
if ((gsize) oldvalue & OBJECT_FLOATING_FLAG)
g_object_unref (object);
return object;
}
void
g_object_force_floating (GObject *object)
{
gpointer oldvalue;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (object->ref_count >= 1);
do
{
oldvalue = g_atomic_pointer_get (&object->qdata);
}
while (!g_atomic_pointer_compare_and_exchange ((void**) &object->qdata, oldvalue,
(gpointer) ((gsize) oldvalue | OBJECT_FLOATING_FLAG)));
}
typedef struct {
GObject *object;
guint n_toggle_refs;