/**
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* \file
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* Memory barrier inline functions
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*
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* Author:
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* Mark Probst (mark.probst@gmail.com)
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*
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* (C) 2007 Novell, Inc
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*/
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#ifndef _MONO_UTILS_MONO_MEMBAR_H_
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#define _MONO_UTILS_MONO_MEMBAR_H_
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#include <config.h>
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#include <glib.h>
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#ifdef TARGET_WASM
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static inline void mono_memory_barrier (void)
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{
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}
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static inline void mono_memory_read_barrier (void)
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{
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}
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static inline void mono_memory_write_barrier (void)
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{
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}
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#elif _MSC_VER
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#include <intrin.h>
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static inline void mono_memory_barrier (void)
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{
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/* NOTE: _ReadWriteBarrier and friends only prevent the
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compiler from reordering loads and stores. To prevent
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the CPU from doing the same, we have to use the
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MemoryBarrier macro which expands to e.g. a serializing
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XCHG instruction on x86. Also note that the MemoryBarrier
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macro does *not* imply _ReadWriteBarrier, so that call
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cannot be eliminated. */
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_ReadWriteBarrier ();
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MemoryBarrier ();
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}
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static inline void mono_memory_read_barrier (void)
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{
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_ReadBarrier ();
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MemoryBarrier ();
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}
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static inline void mono_memory_write_barrier (void)
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{
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_WriteBarrier ();
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MemoryBarrier ();
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}
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#elif defined(USE_GCC_ATOMIC_OPS)
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static inline void mono_memory_barrier (void)
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{
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__sync_synchronize ();
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}
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static inline void mono_memory_read_barrier (void)
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{
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mono_memory_barrier ();
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}
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static inline void mono_memory_write_barrier (void)
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{
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mono_memory_barrier ();
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}
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#elif defined(PLATFORM_UNITY) && defined(UNITY_USE_PLATFORM_STUBS)
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static inline void mono_memory_barrier (void)
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{
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g_assert(0 && "This function is not yet implemented for the Unity platform.");
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}
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static inline void mono_memory_read_barrier (void)
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{
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g_assert(0 && "This function is not yet implemented for the Unity platform.");
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}
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static inline void mono_memory_write_barrier (void)
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{
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g_assert(0 && "This function is not yet implemented for the Unity platform.");
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}
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#else
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#error "Don't know how to do memory barriers!"
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#endif
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#endif /* _MONO_UTILS_MONO_MEMBAR_H_ */
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