text: //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions
  // are met:
  //  * Redistributions of source code must retain the above copyright
  //    notice, this list of conditions and the following disclaimer.
  //  * Redistributions in binary form must reproduce the above copyright
  //    notice, this list of conditions and the following disclaimer in the
  //    documentation and/or other materials provided with the distribution.
  //  * Neither the name of NVIDIA CORPORATION nor the names of its
  //    contributors may be used to endorse or promote products derived
  //    from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  // PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  // Copyright (c) 2008-2019 NVIDIA Corporation. All rights reserved.
  // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
  // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
  
  #ifndef PSFOUNDATION_PSATOMIC_H
  #define PSFOUNDATION_PSATOMIC_H
  
  #include "Ps.h"
  
  namespace physx
  {
  namespace shdfnd
  {
  /* set *dest equal to val. Return the old value of *dest */
  PX_FOUNDATION_API int32_t atomicExchange(volatile int32_t* dest, int32_t val);
  
  /* if *dest == comp, replace with exch. Return original value of *dest */
  PX_FOUNDATION_API int32_t atomicCompareExchange(volatile int32_t* dest, int32_t exch, int32_t comp);
  
  /* if *dest == comp, replace with exch. Return original value of *dest */
  PX_FOUNDATION_API void* atomicCompareExchangePointer(volatile void** dest, void* exch, void* comp);
  
  /* increment the specified location. Return the incremented value */
  PX_FOUNDATION_API int32_t atomicIncrement(volatile int32_t* val);
  
  /* decrement the specified location. Return the decremented value */
  PX_FOUNDATION_API int32_t atomicDecrement(volatile int32_t* val);
  
  /* add delta to *val. Return the new value */
  PX_FOUNDATION_API int32_t atomicAdd(volatile int32_t* val, int32_t delta);
  
  /* compute the maximum of dest and val. Return the new value */
  PX_FOUNDATION_API int32_t atomicMax(volatile int32_t* val, int32_t val2);
  
  } // namespace shdfnd
  } // namespace physx
  
  #endif // #ifndef PSFOUNDATION_PSATOMIC_H
  