Revision control
++ // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
++ // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
++ // SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
++ // SPDX-License-Identifier: Apache-2.0
++
++ #include "foundation/PxAtomic.h"
++
++ #if ! PX_EMSCRIPTEN
++ #define PAUSE() asm("nop")
++ #else
++ #define PAUSE()
++ #endif
++
++ namespace physx
++ {
++
++ void* PxAtomicCompareExchangePointer(volatile void** dest, void* exch, void* comp)
++ {
++ return __sync_val_compare_and_swap(const_cast<void**>(dest), comp, exch);
++ }
++
++ PxI32 PxAtomicCompareExchange(volatile PxI32* dest, PxI32 exch, PxI32 comp)
++ {
++ return __sync_val_compare_and_swap(dest, comp, exch);
++ }
++
++ PxI64 PxAtomicCompareExchange(volatile PxI64* dest, PxI64 exch, PxI64 comp)
++ {
++ return __sync_val_compare_and_swap(dest, comp, exch);
++ }
++
++ PxI32 PxAtomicIncrement(volatile PxI32* val)
++ {
++ return __sync_add_and_fetch(val, 1);
++ }
++
++ PxI64 PxAtomicIncrement(volatile PxI64* val)
++ {
++ return __sync_add_and_fetch(val, 1);
++ }
++
++ PxI32 PxAtomicDecrement(volatile PxI32* val)
++ {
++ return __sync_sub_and_fetch(val, 1);
++ }
++
++ PxI64 PxAtomicDecrement(volatile PxI64* val)
++ {
++ return __sync_sub_and_fetch(val, 1);
++ }
++
++ PxI32 PxAtomicAdd(volatile PxI32* val, PxI32 delta)
++ {
++ return __sync_add_and_fetch(val, delta);
++ }
++
++ PxI64 PxAtomicAdd(volatile PxI64* val, PxI64 delta)
++ {
++ return __sync_add_and_fetch(val, delta);
++ }
++
++ PxI32 PxAtomicMax(volatile PxI32* val, PxI32 val2)
++ {
++ PxI32 oldVal, newVal;
++
++ do
++ {
++ PAUSE();
++ oldVal = *val;
++
++ if(val2 > oldVal)
++ newVal = val2;
++ else
++ newVal = oldVal;
++
++ } while(PxAtomicCompareExchange(val, newVal, oldVal) != oldVal);
++
++ return *val;
++ }
++
++ PxI64 PxAtomicMax(volatile PxI64* val, PxI64 val2)
++ {
++ PxI64 oldVal, newVal;
++
++ do
++ {
++ PAUSE();
++ oldVal = *val;
++
++ if(val2 > oldVal)
++ newVal = val2;
++ else
++ newVal = oldVal;
++
++ } while(PxAtomicCompareExchange(val, newVal, oldVal) != oldVal);
++
++ return *val;
++ }
++
++ PxI32 PxAtomicExchange(volatile PxI32* val, PxI32 val2)
++ {
++ PxI32 newVal, oldVal;
++
++ do
++ {
++ PAUSE();
++ oldVal = *val;
++ newVal = val2;
++ } while(PxAtomicCompareExchange(val, newVal, oldVal) != oldVal);
++
++ return oldVal;
++ }
++
++ PxI64 PxAtomicExchange(volatile PxI64* val, PxI64 val2)
++ {
++ PxI64 newVal, oldVal;
++
++ do
++ {
++ PAUSE();
++ oldVal = *val;
++ newVal = val2;
++ } while(PxAtomicCompareExchange(val, newVal, oldVal) != oldVal);
++
++ return oldVal;
++ }
++
++ PxI32 PxAtomicOr(volatile PxI32* val, PxI32 mask)
++ {
++ return __sync_fetch_and_or(val, mask);
++ }
++
++ PxI64 PxAtomicOr(volatile PxI64* val, PxI64 mask)
++ {
++ return __sync_fetch_and_or(val, mask);
++ }
++
++ PxI32 PxAtomicAnd(volatile PxI32* val, PxI32 mask)
++ {
++ return __sync_fetch_and_and(val, mask);
++ }
++
++ PxI64 PxAtomicAnd(volatile PxI64* val, PxI64 mask)
++ {
++ return __sync_fetch_and_and(val, mask);
++ }
++
++ } // namespace physx