X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=include%2Furcu%2Fsystem.h;fp=include%2Furcu%2Fsystem.h;h=139c37f6d474a646141bb0650b6f8c936061a9a2;hp=8816c50c924e07293aabf72af9a615046c85ef77;hb=d18544842bdfbf2cba6c194a8e8d305ddf5e295e;hpb=72d24c88ee075c8368fe57ee7e8fc66d99ce7e39

diff --git a/include/urcu/system.h b/include/urcu/system.h
index 8816c50..139c37f 100644
--- a/include/urcu/system.h
+++ b/include/urcu/system.h
@@ -9,9 +9,29 @@
  * System definitions.
  */
 
+#include <urcu/config.h>
 #include <urcu/compiler.h>
 #include <urcu/arch.h>
 
+#ifdef CONFIG_RCU_USE_ATOMIC_BUILTINS
+
+#define CMM_LOAD_SHARED(x)						\
+	__atomic_load_n(cmm_cast_volatile(&(x)), __ATOMIC_RELAXED)
+
+#define _CMM_LOAD_SHARED(x) CMM_LOAD_SHARED(x)
+
+#define CMM_STORE_SHARED(x, v)					\
+	__extension__						\
+	({							\
+		__typeof__(v) _v = (v);				\
+		__atomic_store_n(cmm_cast_volatile(&(x)), _v,	\
+				 __ATOMIC_RELAXED);		\
+		_v;						\
+	})
+
+#define _CMM_STORE_SHARED(x, v) CMM_STORE_SHARED(x, v)
+
+#else
 /*
  * Identify a shared load. A cmm_smp_rmc() or cmm_smp_mc() should come
  * before the load.
@@ -46,4 +66,6 @@
 		_v = _v;	/* Work around clang "unused result" */	\
 	})
 
+#endif	/* CONFIG_RCU_USE_ATOMIC_BUILTINS */
+
 #endif /* _URCU_SYSTEM_H */