critical.c (GOMP_critical_name_start): Fix *pptr initialization when…

critical.c (GOMP_critical_name_start): Fix *pptr initialization when gomp_mutex_t is larger than pointer and...

	* critical.c (GOMP_critical_name_start): Fix *pptr initialization
	when gomp_mutex_t is larger than pointer and HAVE_SYNC_BUILTINS is
	defined.

From-SVN: r114843

libgomp/ChangeLog

+2006-06-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* critical.c (GOMP_critical_name_start): Fix *pptr initialization
+	when gomp_mutex_t is larger than pointer and HAVE_SYNC_BUILTINS is
+	defined.
+
 2006-06-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR libgomp/26175

libgomp/critical.c

@@ -72,12 +72,14 @@ GOMP_critical_name_start (void **pptr)
 	  gomp_mutex_t *nlock = gomp_malloc (sizeof (gomp_mutex_t));
 	  gomp_mutex_init (nlock);
 
-	  plock = __sync_val_compare_and_swap (pptr, plock, nlock);
-	  if (plock != nlock)
+	  plock = __sync_val_compare_and_swap (pptr, NULL, nlock);
+	  if (plock != NULL)
 	    {
 	      gomp_mutex_destroy (nlock);
 	      free (nlock);
 	    }
+	  else
+	    plock = nlock;
 #else
 	  gomp_mutex_lock (&create_lock_lock);
 	  plock = *pptr;