ApplePlatformAtomics.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================================
    ApplePlatformAtomics.h: Apple platform Atomics functions
==============================================================================================*/
 
#pragma once
#include "GenericPlatform/GenericPlatformAtomics.h"
#include "CoreTypes.h"
#include "Clang/ClangPlatformAtomics.h"
 
PRAGMA_DISABLE_DEPRECATION_WARNINGS
 
struct CORE_API FApplePlatformAtomics : public FClangPlatformAtomics
{
#if PLATFORM_HAS_128BIT_ATOMICS
    static FORCEINLINE bool InterlockedCompareExchange128( volatile FInt128* Dest, const FInt128& Exchange, FInt128* Comparand )
    {
        __uint128_t* Expected = ((__uint128_t*)Comparand);
        __uint128_t Desired = ((__uint128_t const&)Exchange);
        return __atomic_compare_exchange_16((volatile __uint128_t*)Dest, Expected, Desired, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
    }
    
    static FORCEINLINE bool CanUseCompareExchange128()
    {
        return true;
    }
#endif
};
 
PRAGMA_ENABLE_DEPRECATION_WARNINGS
 
typedef FApplePlatformAtomics FPlatformAtomics;