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Use compiler intrinsics, where available

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slouken committed Jan 17, 2011
1 parent d5c68ad commit a425d7c8708065d0ea18d70e9ea0669c6b59c404

File 1 of 1 in a425d7c

@@ -113,18 +113,19 @@ extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock);
#ifndef SDL_DISABLE_ATOMIC_INLINE

#if defined(__WIN32__)
/* Don't include windows.h, since it may hose code that isn't expecting it,
but if someone has already included it, this is fair game... */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <intrin.h>

#define SDL_AtomicSet(a, v) InterlockedExchange(&(a)->value, v)
#define SDL_AtomicSet(a, v) _InterlockedExchange(&(a)->value, (v))
#define SDL_AtomicGet(a) ((a)->value)
#define SDL_AtomicAdd(a, v) InterlockedAdd(&(a)->value, v)
#define SDL_AtomicCAS(a, oldval, newval) (InterlockedCompareExchange(&(a)->value, newval, oldval) == (oldval))
#define SDL_AtomicSetPtr(a, v) InterlockedExchangePointer(a, v)
#define SDL_AtomicGetPtr(a) (*(a))
#define SDL_AtomicCASPtr(a, oldval, newval) (InterlockedCompareExchangePointer(a, newval, oldval) == (oldval))
#define SDL_AtomicAdd(a, v) _InterlockedExchangeAdd(&(a)->value, (v))
#define SDL_AtomicCAS(a, oldval, newval) (_InterlockedCompareExchange(&(a)->value, (newval), (oldval)) == (oldval))
#define SDL_AtomicSetPtr(a, v) (void)_InterlockedExchangePointer((a), (v))
#define SDL_AtomicGetPtr(a) (*(a))
#if _M_IX86
#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchange((long*)(a), (long)(newval), (long)(oldval)) == (long)(oldval))
#else
#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchangePointer((a), (newval), (oldval)) == (oldval))
#endif

#elif defined(__MACOSX__)
#include <libkern/OSAtomic.h>

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