Added memory barrier semantics to ngx_rwlock_unlock().

diff --git a/src/core/ngx_rwlock.c b/src/core/ngx_rwlock.c
index 905de780a876e62741e60946f883c67671cf08be..0aed29af5f0de118593b3b6b4fd84955077b1899 100644 (file)
--- a/src/core/ngx_rwlock.c
+++ b/src/core/ngx_rwlock.c
@@ -94,7 +94,7 @@ ngx_rwlock_unlock(ngx_atomic_t *lock)
     readers = *lock;
 
     if (readers == NGX_RWLOCK_WLOCK) {
-        *lock = 0;
+        (void) ngx_atomic_cmp_set(lock, NGX_RWLOCK_WLOCK, 0);
         return;
     }