forked from Green-Sky/tomato
sdl (master post 3.1 preview) Merge commit 'e4f454091a943345938608570b104400f62fd625'
This commit is contained in:
48
external/sdl/SDL/src/atomic/SDL_atomic.c
vendored
48
external/sdl/SDL/src/atomic/SDL_atomic.c
vendored
@ -25,11 +25,11 @@
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#define HAVE_MSC_ATOMICS 1
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#endif
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#ifdef __MACOS__ /* !!! FIXME: should we favor gcc atomics? */
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#ifdef SDL_PLATFORM_MACOS /* !!! FIXME: should we favor gcc atomics? */
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#include <libkern/OSAtomic.h>
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#endif
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#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
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#if !defined(HAVE_GCC_ATOMICS) && defined(SDL_PLATFORM_SOLARIS)
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#include <atomic.h>
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#endif
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@ -38,7 +38,7 @@
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#if __has_builtin(__atomic_load_n) || defined(HAVE_GCC_ATOMICS)
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/* !!! FIXME: this advertises as available in the NDK but uses an external symbol we don't have.
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It might be in a later NDK or we might need an extra library? --ryan. */
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#ifndef __ANDROID__
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#ifndef SDL_PLATFORM_ANDROID
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#define HAVE_ATOMIC_LOAD_N 1
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#endif
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#endif
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@ -100,7 +100,7 @@ extern __inline int _SDL_xadd_watcom(volatile int *a, int v);
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Contributed by Bob Pendleton, bob@pendleton.com
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*/
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#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOS__) && !defined(__SOLARIS__) && !defined(HAVE_WATCOM_ATOMICS)
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#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(SDL_PLATFORM_MACOS) && !defined(SDL_PLATFORM_SOLARIS) && !defined(HAVE_WATCOM_ATOMICS)
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#define EMULATE_CAS 1
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#endif
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@ -111,18 +111,18 @@ static SDL_INLINE void enterLock(void *a)
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{
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uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
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SDL_AtomicLock(&locks[index]);
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SDL_LockSpinlock(&locks[index]);
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}
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static SDL_INLINE void leaveLock(void *a)
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{
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uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
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SDL_AtomicUnlock(&locks[index]);
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SDL_UnlockSpinlock(&locks[index]);
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}
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#endif
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SDL_bool SDL_AtomicCAS(SDL_AtomicInt *a, int oldval, int newval)
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SDL_bool SDL_AtomicCompareAndSwap(SDL_AtomicInt *a, int oldval, int newval)
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{
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#ifdef HAVE_MSC_ATOMICS
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SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(long) == sizeof(a->value));
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@ -131,9 +131,9 @@ SDL_bool SDL_AtomicCAS(SDL_AtomicInt *a, int oldval, int newval)
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return _SDL_cmpxchg_watcom(&a->value, newval, oldval);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_bool_compare_and_swap(&a->value, oldval, newval);
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#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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#elif defined(SDL_PLATFORM_MACOS) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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return OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return ((int)atomic_cas_uint((volatile uint_t *)&a->value, (uint_t)oldval, (uint_t)newval) == oldval);
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#elif defined(EMULATE_CAS)
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SDL_bool retval = SDL_FALSE;
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@ -151,7 +151,7 @@ SDL_bool SDL_AtomicCAS(SDL_AtomicInt *a, int oldval, int newval)
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#endif
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}
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SDL_bool SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
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SDL_bool SDL_AtomicCompareAndSwapPointer(void **a, void *oldval, void *newval)
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{
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#ifdef HAVE_MSC_ATOMICS
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return _InterlockedCompareExchangePointer(a, newval, oldval) == oldval;
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@ -159,11 +159,11 @@ SDL_bool SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
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return _SDL_cmpxchg_watcom((int *)a, (long)newval, (long)oldval);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_bool_compare_and_swap(a, oldval, newval);
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#elif defined(__MACOS__) && defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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#elif defined(SDL_PLATFORM_MACOS) && defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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return OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t *)a);
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#elif defined(__MACOS__) && !defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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#elif defined(SDL_PLATFORM_MACOS) && !defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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return OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t *)a);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return (atomic_cas_ptr(a, oldval, newval) == oldval);
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#elif defined(EMULATE_CAS)
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SDL_bool retval = SDL_FALSE;
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@ -190,13 +190,13 @@ int SDL_AtomicSet(SDL_AtomicInt *a, int v)
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return _SDL_xchg_watcom(&a->value, v);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_lock_test_and_set(&a->value, v);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return (int)atomic_swap_uint((volatile uint_t *)&a->value, v);
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#else
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int value;
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do {
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value = a->value;
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} while (!SDL_AtomicCAS(a, value, v));
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} while (!SDL_AtomicCompareAndSwap(a, value, v));
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return value;
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#endif
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}
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@ -209,13 +209,13 @@ void *SDL_AtomicSetPtr(void **a, void *v)
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return (void *)_SDL_xchg_watcom((int *)a, (long)v);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_lock_test_and_set(a, v);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return atomic_swap_ptr(a, v);
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#else
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void *value;
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do {
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value = *a;
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} while (!SDL_AtomicCASPtr(a, value, v));
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} while (!SDL_AtomicCompareAndSwapPointer(a, value, v));
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return value;
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#endif
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}
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@ -229,7 +229,7 @@ int SDL_AtomicAdd(SDL_AtomicInt *a, int v)
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return _SDL_xadd_watcom(&a->value, v);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_fetch_and_add(&a->value, v);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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int pv = a->value;
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membar_consumer();
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atomic_add_int((volatile uint_t *)&a->value, v);
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@ -238,7 +238,7 @@ int SDL_AtomicAdd(SDL_AtomicInt *a, int v)
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int value;
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do {
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value = a->value;
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} while (!SDL_AtomicCAS(a, value, (value + v)));
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} while (!SDL_AtomicCompareAndSwap(a, value, (value + v)));
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return value;
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#endif
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}
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@ -254,15 +254,15 @@ int SDL_AtomicGet(SDL_AtomicInt *a)
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return _SDL_xadd_watcom(&a->value, 0);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_or_and_fetch(&a->value, 0);
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#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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#elif defined(SDL_PLATFORM_MACOS) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
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return sizeof(a->value) == sizeof(uint32_t) ? OSAtomicOr32Barrier(0, (volatile uint32_t *)&a->value) : OSAtomicAdd64Barrier(0, (volatile int64_t *)&a->value);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return atomic_or_uint((volatile uint_t *)&a->value, 0);
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#else
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int value;
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do {
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value = a->value;
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} while (!SDL_AtomicCAS(a, value, value));
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} while (!SDL_AtomicCompareAndSwap(a, value, value));
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return value;
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#endif
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}
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@ -275,13 +275,13 @@ void *SDL_AtomicGetPtr(void **a)
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return _InterlockedCompareExchangePointer(a, NULL, NULL);
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#elif defined(HAVE_GCC_ATOMICS)
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return __sync_val_compare_and_swap(a, (void *)0, (void *)0);
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#elif defined(__SOLARIS__)
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#elif defined(SDL_PLATFORM_SOLARIS)
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return atomic_cas_ptr(a, (void *)0, (void *)0);
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#else
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void *value;
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do {
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value = *a;
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} while (!SDL_AtomicCASPtr(a, value, value));
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} while (!SDL_AtomicCompareAndSwapPointer(a, value, value));
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return value;
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#endif
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}
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