21 #include "../SDL_internal.h" 23 #if defined(__WIN32__) || defined(__WINRT__) 24 #include "../core/windows/SDL_windows.h" 31 #if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__) 35 #if defined(__WATCOMC__) && defined(__386__) 37 extern _inline
int _SDL_xchg_watcom(
volatile int *
a,
int v);
38 #pragma aux _SDL_xchg_watcom = \ 49 #if SDL_ATOMIC_DISABLED 53 if (!_spinlock_mutex) {
67 #elif defined(_MSC_VER) 69 return (InterlockedExchange((
long*)lock, 1) == 0);
71 #elif defined(__WATCOMC__) && defined(__386__) 72 return _SDL_xchg_watcom(lock, 1) == 0;
74 #elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET 75 return (__sync_lock_test_and_set(lock, 1) == 0);
77 #elif defined(__GNUC__) && defined(__arm__) && \ 78 (defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) || \ 79 defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5TE__) || \ 80 defined(__ARM_ARCH_5TEJ__)) 82 __asm__ __volatile__ (
84 :
"=&r,&r" (result) :
"r,0" (1),
"r,r" (lock) :
"memory");
87 #elif defined(__GNUC__) && defined(__arm__) 89 __asm__ __volatile__ (
90 "ldrex %0, [%2]\nteq %0, #0\nstrexeq %0, %1, [%2]" 91 :
"=&r" (result) :
"r" (1),
"r" (lock) :
"cc",
"memory");
94 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) 97 "lock ; xchgl %0, (%1)\n" 98 :
"=r" (result) :
"r" (lock),
"0" (1) :
"cc",
"memory");
101 #elif defined(__MACOSX__) || defined(__IPHONEOS__) 103 return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
105 #elif defined(__SOLARIS__) && defined(_LP64) 109 #elif defined(__SOLARIS__) && !defined(_LP64) 114 #error Please implement for your platform. 131 #if defined(_MSC_VER) 135 #elif defined(__WATCOMC__) && defined(__386__) 139 #elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET 140 __sync_lock_release(lock);
142 #elif defined(__SOLARIS__)
#define SDL_CompilerBarrier()
void SDL_AtomicLock(SDL_SpinLock *lock)
Lock a spin lock by setting it to a non-zero value.
void SDL_AtomicUnlock(SDL_SpinLock *lock)
Unlock a spin lock by setting it to 0. Always returns immediately.
unsigned long long uint64_t
SDL_bool SDL_AtomicTryLock(SDL_SpinLock *lock)
Try to lock a spin lock by setting it to a non-zero value.
GLboolean GLboolean GLboolean GLboolean a
#define SDL_COMPILE_TIME_ASSERT(name, x)