mirror of
https://github.com/bkaradzic/bx.git
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103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
/*
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* Copyright 2010-2013 Branimir Karadzic. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#ifndef __BX_CPU_H__
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#define __BX_CPU_H__
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#include "bx.h"
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#if BX_COMPILER_MSVC
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# if BX_PLATFORM_XBOX360
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# include <ppcintrinsics.h>
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# include <xtl.h>
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# else
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# include <math.h> // math.h is included because VS bitches:
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// warning C4985: 'ceil': attributes not present on previous declaration.
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// must be included before intrin.h.
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# include <intrin.h>
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# include <windows.h>
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# endif // !BX_PLATFORM_XBOX360
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extern "C" void _ReadBarrier();
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extern "C" void _WriteBarrier();
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extern "C" void _ReadWriteBarrier();
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# pragma intrinsic(_ReadBarrier)
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# pragma intrinsic(_WriteBarrier)
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# pragma intrinsic(_ReadWriteBarrier)
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# pragma intrinsic(_InterlockedIncrement)
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# pragma intrinsic(_InterlockedDecrement)
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#endif // BX_COMPILER_MSVC
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namespace bx
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{
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inline void readBarrier()
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{
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#if BX_COMPILER_MSVC
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_ReadBarrier();
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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asm volatile("":::"memory");
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#endif // BX_COMPILER
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}
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inline void writeBarrier()
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{
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#if BX_COMPILER_MSVC
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_WriteBarrier();
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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asm volatile("":::"memory");
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#endif // BX_COMPILER
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}
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inline void readWriteBarrier()
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{
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#if BX_COMPILER_MSVC
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_ReadWriteBarrier();
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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asm volatile("":::"memory");
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#endif // BX_COMPILER
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}
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inline void memoryBarrier()
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{
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#if BX_PLATFORM_XBOX360
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__lwsync();
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#elif BX_COMPILER_MSVC
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_mm_mfence();
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#else
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__sync_synchronize();
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// asm volatile("mfence":::"memory");
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#endif // BX_COMPILER
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}
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inline int32_t atomicIncr(volatile void* _var)
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{
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#if BX_COMPILER_MSVC
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return _InterlockedIncrement( (volatile LONG*)(_var) );
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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return __sync_fetch_and_add( (volatile int32_t*)_var, 1);
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#endif // BX_COMPILER
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}
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inline int32_t atomicDecr(volatile void* _var)
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{
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#if BX_COMPILER_MSVC
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return _InterlockedDecrement( (volatile LONG*)(_var) );
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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return __sync_fetch_and_sub( (volatile int32_t*)_var, 1);
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#endif // BX_COMPILER
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}
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inline void* atomicExchangePtr(void** _target, void* _ptr)
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{
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#if BX_COMPILER_MSVC
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return InterlockedExchangePointer(_target, _ptr);
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#elif BX_COMPILER_GCC || BX_COMPILER_CLANG
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return __sync_lock_test_and_set(_target, _ptr);
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#endif // BX_COMPILER
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}
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} // namespace bx
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#endif // __BX_CPU_H__
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