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Use compiler intrinsics on Windows

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This commit is contained in:
Sam Lantinga 2011-01-17 14:05:43 -08:00
parent f5bbe15139
commit b8df61a201
1 changed files with 3 additions and 3 deletions
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6
src/atomic/SDL_spinlock.c
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@ -25,8 +25,7 @@
#include "SDL_timer.h"
#if defined(__WIN32__)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <intrin.h>
#elif defined(__MACOSX__)
#include <libkern/OSAtomic.h>
@ -39,7 +38,8 @@ SDL_bool
SDL_AtomicTryLock(SDL_SpinLock *lock)
{
#if defined(__WIN32__)
return (InterlockedExchange(lock, 1) == 0);
SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
return (_InterlockedExchange((long*)lock, 1) == 0);
#elif defined(__MACOSX__)
return OSAtomicCompareAndSwap32Barrier(0, 1, lock);