luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-08-24 01:48:53 +02:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'more-atomic-exchange-full' into 'main'

Browse Source 
gdataset, gobject: Use atomic compare and exchange full to set pointers

See merge request GNOME/glib!3426
This commit is contained in:
Philip Withnall
2023-05-30 11:59:40 +00:00
parent 153c7f7b99 ea904fba1a
commit 0196a36022
3 changed files with 22 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
gobject/gobject.c
View File

@@ -3435,16 +3435,20 @@ object_floating_flag_handler (GObject *object,
{
gpointer oldvalue;
case +1: /* force floating if possible */
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)));
oldvalue = g_atomic_pointer_get (&object->qdata);
while (!g_atomic_pointer_compare_and_exchange_full (
(void**) &object->qdata, oldvalue,
(void *) ((gsize) oldvalue | OBJECT_FLOATING_FLAG),
&oldvalue))
;
return (gsize) oldvalue & OBJECT_FLOATING_FLAG;
case -1: /* sink if possible */
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)));
oldvalue = g_atomic_pointer_get (&object->qdata);
while (!g_atomic_pointer_compare_and_exchange_full (
(void**) &object->qdata, oldvalue,
(void *) ((gsize) oldvalue & ~(gsize) OBJECT_FLOATING_FLAG),
&oldvalue))
;
return (gsize) oldvalue & OBJECT_FLOATING_FLAG;
default: /* check floating */
return 0 != ((gsize) g_atomic_pointer_get (&object->qdata) & OBJECT_FLOATING_FLAG);