compiler_msvc_exchange.h

// Copyright (c) Electronic Arts Inc. All rights reserved.
 
 
#ifndef EASTL_ATOMIC_INTERNAL_COMPILER_MSVC_EXCHANGE_H
#define EASTL_ATOMIC_INTERNAL_COMPILER_MSVC_EXCHANGE_H
 
#if defined(EA_PRAGMA_ONCE_SUPPORTED)
    #pragma once
#endif
 
 
#define EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, MemoryOrder)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_OP_N(char, _InterlockedExchange8, type, ret, ptr, val, MemoryOrder)
 
#define EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, MemoryOrder) \
    EASTL_MSVC_ATOMIC_EXCHANGE_OP_N(short, _InterlockedExchange16, type, ret, ptr, val, MemoryOrder)
 
#define EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, MemoryOrder) \
    EASTL_MSVC_ATOMIC_EXCHANGE_OP_N(long, _InterlockedExchange, type, ret, ptr, val, MemoryOrder)
 
#define EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, MemoryOrder) \
    EASTL_MSVC_ATOMIC_EXCHANGE_OP_N(__int64, _InterlockedExchange64, type, ret, ptr, val, MemoryOrder)
 
#define EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, MemoryOrder) \
    {                                                                   \
        bool cmpxchgRet;                                                \
        /* This is intentionally a non-atomic 128-bit load which may observe shearing. */ \
        /* Either we do not observe *(ptr) but then the cmpxchg will fail and the observed */ \
        /* atomic load will be returned. Or the non-atomic load got lucky and the cmpxchg succeeds */ \
        /* because the observed value equals the value in *(ptr) thus we optimistically do a non-atomic load. */ \
        ret = *(ptr);                                                   \
        do                                                              \
        {                                                               \
            EA_PREPROCESSOR_JOIN(EA_PREPROCESSOR_JOIN(EASTL_ATOMIC_CMPXCHG_STRONG_, MemoryOrder), _128)(type, cmpxchgRet, ptr, &(ret), val); \
        } while (!cmpxchgRet);                                          \
    }
 
 
//
// void EASTL_COMPILER_ATOMIC_EXCHANGE_*_N(type, type ret, type * ptr, type val)
//
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELAXED_8(type, ret, ptr, val)   \
    EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, RELAXED)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELAXED_16(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, RELAXED)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELAXED_32(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, RELAXED)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELAXED_64(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, RELAXED)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELAXED_128(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, RELAXED)
 
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQUIRE_8(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, ACQUIRE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQUIRE_16(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, ACQUIRE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQUIRE_32(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, ACQUIRE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQUIRE_64(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, ACQUIRE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQUIRE_128(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, ACQUIRE)
 
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELEASE_8(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, RELEASE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELEASE_16(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, RELEASE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELEASE_32(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, RELEASE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELEASE_64(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, RELEASE)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_RELEASE_128(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, RELEASE)
 
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQ_REL_8(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, ACQ_REL)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQ_REL_16(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, ACQ_REL)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQ_REL_32(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, ACQ_REL)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQ_REL_64(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, ACQ_REL)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_ACQ_REL_128(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, ACQ_REL)
 
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_SEQ_CST_8(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_8(type, ret, ptr, val, SEQ_CST)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_SEQ_CST_16(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_16(type, ret, ptr, val, SEQ_CST)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_SEQ_CST_32(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_32(type, ret, ptr, val, SEQ_CST)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_SEQ_CST_64(type, ret, ptr, val)  \
    EASTL_MSVC_ATOMIC_EXCHANGE_64(type, ret, ptr, val, SEQ_CST)
 
#define EASTL_COMPILER_ATOMIC_EXCHANGE_SEQ_CST_128(type, ret, ptr, val) \
    EASTL_MSVC_ATOMIC_EXCHANGE_128(type, ret, ptr, val, SEQ_CST)
 
 
#endif /* EASTL_ATOMIC_INTERNAL_COMPILER_MSVC_EXCHANGE_H */