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comparison src/atomic/SDL_spinlock.c @ 5015:1bf9e38431ec

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Use compiler intrinsics on Windows
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Jan 2011 14:05:43 -0800
parents 0c72ae7b7cb2
children fffb33ae85e8
comparison
equal deleted inserted replaced
5014:22751715e11a 5015:1bf9e38431ec
23 23
24 #include "SDL_atomic.h" 24 #include "SDL_atomic.h"
25 #include "SDL_timer.h" 25 #include "SDL_timer.h"
26 26
27 #if defined(__WIN32__) 27 #if defined(__WIN32__)
28 #define WIN32_LEAN_AND_MEAN 28 #include <intrin.h>
29 #include <windows.h>
30 29
31 #elif defined(__MACOSX__) 30 #elif defined(__MACOSX__)
32 #include <libkern/OSAtomic.h> 31 #include <libkern/OSAtomic.h>
33 32
34 #endif 33 #endif
37 /* This function is where all the magic happens... */ 36 /* This function is where all the magic happens... */
38 SDL_bool 37 SDL_bool
39 SDL_AtomicTryLock(SDL_SpinLock *lock) 38 SDL_AtomicTryLock(SDL_SpinLock *lock)
40 { 39 {
41 #if defined(__WIN32__) 40 #if defined(__WIN32__)
42 return (InterlockedExchange(lock, 1) == 0); 41 SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
42 return (_InterlockedExchange((long*)lock, 1) == 0);
43 43
44 #elif defined(__MACOSX__) 44 #elif defined(__MACOSX__)
45 return OSAtomicCompareAndSwap32Barrier(0, 1, lock); 45 return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
46 46
47 #elif defined(HAVE_GCC_ATOMICS) 47 #elif defined(HAVE_GCC_ATOMICS)