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better SDL_AtomicGet(Ptr) implementation

This commit is contained in:
pionere 2022-11-07 09:05:32 +01:00 committed by Sam Lantinga
parent 64c93f7804
commit eb670742f5
1 changed files with 17 additions and 0 deletions
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17
src/atomic/SDL_atomic.c
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@ -264,6 +264,17 @@ SDL_AtomicGet(SDL_atomic_t *a)
{
#ifdef HAVE_ATOMIC_LOAD_N
return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
#elif defined(HAVE_MSC_ATOMICS)
SDL_COMPILE_TIME_ASSERT(atomic_get, sizeof(long) == sizeof(int));
return _InterlockedOr((long *)&a->value, 0);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xadd_watcom(&a->value, 0);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_or_and_fetch(&a->value, 0);
#elif defined(__MACOSX__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return sizeof(int) == sizeof(uint32_t) ? OSAtomicOr32Barrier(0, (volatile uint32_t *)&a->value) : OSAtomicAdd64Barrier(0, (volatile int64_t *)&a->value);
#elif defined(__SOLARIS__)
return atomic_or_uint((volatile uint_t *)&a->value, 0);
#else
int value;
do {
@ -278,6 +289,12 @@ SDL_AtomicGetPtr(void **a)
{
#ifdef HAVE_ATOMIC_LOAD_N
return __atomic_load_n(a, __ATOMIC_SEQ_CST);
#elif defined(HAVE_MSC_ATOMICS)
return _InterlockedCompareExchangePointer(a, NULL, NULL);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_val_compare_and_swap(a, (void *)0, (void *)0);
#elif defined(__SOLARIS__)
return atomic_cas_ptr(a, (void *)0, (void *)0);
#else
void *value;
do {