+// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: MIT
+
#ifndef _URCU_SYSTEM_H
#define _URCU_SYSTEM_H
/*
- * system.h
- *
* System definitions.
- *
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
*/
+#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.
_v = _v; /* Work around clang "unused result" */ \
})
+#endif /* CONFIG_RCU_USE_ATOMIC_BUILTINS */
+
#endif /* _URCU_SYSTEM_H */