Commit d635ae4e authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

Use GCC atomics

parent e3d6b0ba
......@@ -118,11 +118,15 @@ void *vlc_gc_init (gc_object_t *p_gc, void (*pf_destruct) (gc_object_t *))
{
p_gc->pf_destructor = pf_destruct;
p_gc->refs = 1;
#ifdef __GNUC__
__sync_synchronize ();
#else
/* Nobody else can possibly lock the spin - it's there as a barrier */
vlc_spin_init (&p_gc->spin);
vlc_spin_lock (&p_gc->spin);
p_gc->refs = 1;
vlc_spin_unlock (&p_gc->spin);
#endif
return p_gc;
}
......@@ -133,12 +137,17 @@ void *vlc_gc_init (gc_object_t *p_gc, void (*pf_destruct) (gc_object_t *))
*/
void *vlc_hold (gc_object_t * p_gc)
{
uintptr_t refs;
assert( p_gc );
#ifdef __GNUC__
refs = __sync_fetch_and_add (&p_gc->refs, 1);
#else
vlc_spin_lock (&p_gc->spin);
assert (p_gc->refs > 0);
p_gc->refs++;
refs = p_gc->refs++;
vlc_spin_unlock (&p_gc->spin);
#endif
assert (refs > 0);
return p_gc;
}
......@@ -148,15 +157,20 @@ void *vlc_hold (gc_object_t * p_gc)
*/
void vlc_release (gc_object_t *p_gc)
{
bool dead;
unsigned refs;
assert( p_gc );
#ifdef __GNUC__
refs = __sync_fetch_and_sub (&p_gc->refs, 1);
#else
vlc_spin_lock (&p_gc->spin);
assert (p_gc->refs > 0);
dead = !--p_gc->refs;
refs = p_gc->refs--;
vlc_spin_unlock (&p_gc->spin);
#endif
if (dead)
assert (refs > 0);
if (refs == 1)
{
vlc_spin_destroy (&p_gc->spin);
p_gc->pf_destructor (p_gc);
......
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