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// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: MIT
#ifndef _URCU_SYSTEM_H
#define _URCU_SYSTEM_H
/*
* System definitions.
*/
#include <urcu/compiler.h>
#include <urcu/arch.h>
/*
* 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.
*/
#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.
*/
#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 */
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