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#ifndef _URCU_SYSTEM_H
#define _URCU_SYSTEM_H
/*
* system.h
*
* System definitions.
*
* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
#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) \
({ \
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) ({ 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) \
({ \
typeof(x) _v = _CMM_STORE_SHARED(x, v); \
cmm_smp_wmc(); \
_v; \
})
#endif /* _URCU_SYSTEM_H */
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