#include <urcu/arch.h>
/*
- * Identify a shared load. A cmm_smp_rmc() or cmm_smp_mc() should come before the load.
+ * Identify a shared load. A cmm_smp_rmc() or cmm_smp_mc() should come
+ * before the load.
*/
#define _CMM_LOAD_SHARED(p) CMM_ACCESS_ONCE(p)
* Load a data from shared memory, doing a cache flush if required.
*/
#define CMM_LOAD_SHARED(p) \
+ __extension__ \
({ \
cmm_smp_rmc(); \
_CMM_LOAD_SHARED(p); \
})
/*
- * Identify a shared store. A cmm_smp_wmc() or cmm_smp_mc() should follow the store.
+ * Identify a shared store. A cmm_smp_wmc() or cmm_smp_mc() should
+ * follow the store.
*/
-#define _CMM_STORE_SHARED(x, v) ({ CMM_ACCESS_ONCE(x) = (v); })
+#define _CMM_STORE_SHARED(x, v) __extension__ ({ CMM_ACCESS_ONCE(x) = (v); })
/*
- * Store v into x, where x is located in shared memory. Performs the required
- * cache flush after writing. Returns v.
+ * Store v into x, where x is located in shared memory. Performs the
+ * required cache flush after writing. Returns v.
*/
-#define CMM_STORE_SHARED(x, v) \
- ({ \
- typeof(x) _v = _CMM_STORE_SHARED(x, v); \
- cmm_smp_wmc(); \
- _v; \
+#define CMM_STORE_SHARED(x, v) \
+ __extension__ \
+ ({ \
+ __typeof__(x) _v = _CMM_STORE_SHARED(x, v); \
+ cmm_smp_wmc(); \
+ _v = _v; /* Work around clang "unused result" */ \
})
#endif /* _URCU_SYSTEM_H */