X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Futil%2Fu_atomic.c;h=e4bffa8534ea46a49975cece512fc981fca00eed;hb=6ff94735c93b8fcc2a3e5c6eb668b069ac4e0a1a;hp=44b75fb0c00803e23ce6387ab4ed5dbfcb14882f;hpb=a6a38a038bd62e6d9558905f00bef81b5e7e6fcc;p=mesa.git

diff --git a/src/util/u_atomic.c b/src/util/u_atomic.c
index 44b75fb0c00..e4bffa8534e 100644
--- a/src/util/u_atomic.c
+++ b/src/util/u_atomic.c
@@ -61,15 +61,17 @@ __sync_sub_and_fetch_8(uint64_t *ptr, uint64_t val)
 }
 
 WEAK uint64_t
-__atomic_fetch_add_8(uint64_t *ptr, uint64_t val, int memorder)
+__sync_val_compare_and_swap_8(uint64_t *ptr, uint64_t oldval, uint64_t newval)
 {
-   return __sync_add_and_fetch(ptr, val);
-}
+   uint64_t r;
 
-WEAK uint64_t
-__atomic_fetch_sub_8(uint64_t *ptr, uint64_t val, int memorder)
-{
-   return __sync_sub_and_fetch(ptr, val);
+   pthread_mutex_lock(&sync_mutex);
+   r = *ptr;
+   if (*ptr == oldval)
+      *ptr = newval;
+   pthread_mutex_unlock(&sync_mutex);
+
+   return r;
 }
 
 #endif