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Added Uint32 versions of the atomic functions

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This commit is contained in:
Sam Lantinga
2024-09-17 03:27:11 -07:00
parent 8d223b3037
commit d0edf68774
5 changed files with 180 additions and 4 deletions
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85
src/atomic/SDL_atomic.c
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@@ -128,12 +128,13 @@ SDL_bool SDL_CompareAndSwapAtomicInt(SDL_AtomicInt *a, int oldval, int newval)
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(long) == sizeof(a->value));
return _InterlockedCompareExchange((long *)&a->value, (long)newval, (long)oldval) == (long)oldval;
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_cmpxchg_watcom(&a->value, newval, oldval);
return _SDL_cmpxchg_watcom((volatile int *)&a->value, newval, oldval);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_bool_compare_and_swap(&a->value, oldval, newval);
#elif defined(SDL_PLATFORM_MACOS) // this is deprecated in 10.12 sdk; favor gcc atomics.
return OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
#elif defined(SDL_PLATFORM_SOLARIS)
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(uint_t) == sizeof(a->value));
return ((int)atomic_cas_uint((volatile uint_t *)&a->value, (uint_t)oldval, (uint_t)newval) == oldval);
#elif defined(EMULATE_CAS)
bool result = false;
@@ -151,6 +152,37 @@ SDL_bool SDL_CompareAndSwapAtomicInt(SDL_AtomicInt *a, int oldval, int newval)
#endif
}
SDL_bool SDL_CompareAndSwapAtomicU32(SDL_AtomicU32 *a, Uint32 oldval, Uint32 newval)
{
#ifdef HAVE_MSC_ATOMICS
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(long) == sizeof(a->value));
return _InterlockedCompareExchange((long *)&a->value, (long)newval, (long)oldval) == (long)oldval;
#elif defined(HAVE_WATCOM_ATOMICS)
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(int) == sizeof(a->value));
return _SDL_cmpxchg_watcom((volatile int *)&a->value, (int)newval, (int)oldval);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_bool_compare_and_swap(&a->value, oldval, newval);
#elif defined(SDL_PLATFORM_MACOS) // this is deprecated in 10.12 sdk; favor gcc atomics.
return OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t*)&a->value);
#elif defined(SDL_PLATFORM_SOLARIS)
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(uint_t) == sizeof(a->value));
return ((Uint32)atomic_cas_uint((volatile uint_t *)&a->value, (uint_t)oldval, (uint_t)newval) == oldval);
#elif defined(EMULATE_CAS)
bool result = false;
enterLock(a);
if (a->value == oldval) {
a->value = newval;
result = true;
}
leaveLock(a);
return result;
#else
#error Please define your platform.
#endif
}
SDL_bool SDL_CompareAndSwapAtomicPointer(void **a, void *oldval, void *newval)
{
#ifdef HAVE_MSC_ATOMICS
@@ -191,6 +223,7 @@ int SDL_SetAtomicInt(SDL_AtomicInt *a, int v)
#elif defined(HAVE_GCC_ATOMICS)
return __sync_lock_test_and_set(&a->value, v);
#elif defined(SDL_PLATFORM_SOLARIS)
SDL_COMPILE_TIME_ASSERT(atomic_set, sizeof(uint_t) == sizeof(a->value));
return (int)atomic_swap_uint((volatile uint_t *)&a->value, v);
#else
int value;
@@ -201,6 +234,27 @@ int SDL_SetAtomicInt(SDL_AtomicInt *a, int v)
#endif
}
Uint32 SDL_SetAtomicU32(SDL_AtomicU32 *a, Uint32 v)
{
#ifdef HAVE_MSC_ATOMICS
SDL_COMPILE_TIME_ASSERT(atomic_set, sizeof(long) == sizeof(a->value));
return _InterlockedExchange((long *)&a->value, v);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xchg_watcom(&a->value, v);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_lock_test_and_set(&a->value, v);
#elif defined(SDL_PLATFORM_SOLARIS)
SDL_COMPILE_TIME_ASSERT(atomic_set, sizeof(uint_t) == sizeof(a->value));
return (Uint32)atomic_swap_uint((volatile uint_t *)&a->value, v);
#else
Uint32 value;
do {
value = a->value;
} while (!SDL_CompareAndSwapAtomicU32(a, value, v));
return value;
#endif
}
void *SDL_SetAtomicPointer(void **a, void *v)
{
#ifdef HAVE_MSC_ATOMICS
@@ -226,7 +280,8 @@ int SDL_AddAtomicInt(SDL_AtomicInt *a, int v)
SDL_COMPILE_TIME_ASSERT(atomic_add, sizeof(long) == sizeof(a->value));
return _InterlockedExchangeAdd((long *)&a->value, v);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xadd_watcom(&a->value, v);
SDL_COMPILE_TIME_ASSERT(atomic_add, sizeof(int) == sizeof(a->value));
return _SDL_xadd_watcom((volatile int *)&a->value, v);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_fetch_and_add(&a->value, v);
#elif defined(SDL_PLATFORM_SOLARIS)
@@ -267,6 +322,32 @@ int SDL_GetAtomicInt(SDL_AtomicInt *a)
#endif
}
Uint32 SDL_GetAtomicU32(SDL_AtomicU32 *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(a->value));
return (Uint32)_InterlockedOr((long *)&a->value, 0);
#elif defined(HAVE_WATCOM_ATOMICS)
SDL_COMPILE_TIME_ASSERT(atomic_get, sizeof(int) == sizeof(a->value));
return (Uint32)_SDL_xadd_watcom((volatile int *)&a->value, 0);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_or_and_fetch(&a->value, 0);
#elif defined(SDL_PLATFORM_MACOS) // this is deprecated in 10.12 sdk; favor gcc atomics.
return OSAtomicOr32Barrier(0, (volatile uint32_t *)&a->value);
#elif defined(SDL_PLATFORM_SOLARIS)
SDL_COMPILE_TIME_ASSERT(atomic_get, sizeof(uint_t) == sizeof(a->value));
return (Uint32)atomic_or_uint_nv((volatile uint_t *)&a->value, 0);
#else
Uint32 value;
do {
value = a->value;
} while (!SDL_CompareAndSwapAtomicU32(a, value, value));
return value;
#endif
}
void *SDL_GetAtomicPointer(void **a)
{
#ifdef HAVE_ATOMIC_LOAD_N