urcu-defer: fix futex wakeup value

[urcu.git] / urcu.c

diff --git a/urcu.c b/urcu.c
index d474fc8a3e8311c036f151698afdeaab7bde192a..32f74880492ce40527c8b5b40560249eac485b90 100644 (file)
--- a/urcu.c
+++ b/urcu.c
@@ -37,6 +37,8 @@
 #include "urcu.h"
 
 #ifndef URCU_MB
+static int init_done;
+
 void __attribute__((constructor)) urcu_init(void);
 void __attribute__((destructor)) urcu_exit(void);
 #else
@@ -45,8 +47,6 @@ void urcu_init(void)
 }
 #endif
 
-static int init_done;
-
 static pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 /*
@@ -347,6 +347,12 @@ void *rcu_xchg_pointer_sym(void **p, void *v)
        return xchg(p, v);
 }
 
+void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new)
+{
+       wmb();
+       return cmpxchg(p, old, _new);
+}
+
 void *rcu_publish_content_sym(void **p, void *v)
 {
        void *oldptr;