/* note how bad things can happen when the 2 threads both raise and release the
* wakeup. This is however not a problem because you must always pair a raise
* with a release */
static inline gboolean
release_wakeup (GstPoll * set)
{
gboolean result = TRUE;
if (g_atomic_int_dec_and_test (&set->control_pending)) {
result = RELEASE_EVENT (set);
}
return result;
}
static inline gint
release_all_wakeup (GstPoll * set)
{
gint old;
while (TRUE) {
if (!(old = g_atomic_int_get (&set->control_pending)))
/* nothing pending, just exit */
break;
/* try to remove all pending control messages */
if (g_atomic_int_compare_and_exchange (&set->control_pending, old, 0)) {
/* we managed to remove all messages, read the control socket */
if (RELEASE_EVENT (set))
break;
else
/* retry again until we read it successfully */
g_atomic_int_add (&set->control_pending, 1);
}
}
return old;
}