test_atomic: test for byte/short atomic support

[urcu.git] / urcu-qsbr.c

diff --git a/urcu-qsbr.c b/urcu-qsbr.c
index 3b9a054b40b1bc61f29768bf5d4085d62a8b7bd9..5c6eaa014721267da7de5f85fff22835d41a80b2 100644 (file)
--- a/urcu-qsbr.c
+++ b/urcu-qsbr.c
@@ -37,7 +37,7 @@
 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
 #include "urcu-qsbr.h"
 
-pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 /*
  * Global grace period counter.
@@ -255,6 +255,12 @@ void *rcu_assign_pointer_sym(void **p, void *v)
        return STORE_SHARED(p, v);
 }
 
+void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new)
+{
+       wmb();
+       return cmpxchg(p, old, _new);
+}
+
 void *rcu_xchg_pointer_sym(void **p, void *v)
 {
        wmb();