PxAtomic.h

// 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) 2008-2022 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 PX_ATOMIC_H
#define PX_ATOMIC_H
 
#include "foundation/PxFoundationConfig.h"
#include "foundation/PxSimpleTypes.h"
 
#if !PX_DOXYGEN
namespace physx
{
#endif
/* set *dest equal to val. Return the old value of *dest */
PX_FOUNDATION_API PxI32 PxAtomicExchange(volatile PxI32* dest, PxI32 val);
 
/* if *dest == comp, replace with exch. Return original value of *dest */
PX_FOUNDATION_API PxI32 PxAtomicCompareExchange(volatile PxI32* dest, PxI32 exch, PxI32 comp);
 
/* if *dest == comp, replace with exch. Return original value of *dest */
PX_FOUNDATION_API void* PxAtomicCompareExchangePointer(volatile void** dest, void* exch, void* comp);
 
/* increment the specified location. Return the incremented value */
PX_FOUNDATION_API PxI32 PxAtomicIncrement(volatile PxI32* val);
 
/* decrement the specified location. Return the decremented value */
PX_FOUNDATION_API PxI32 PxAtomicDecrement(volatile PxI32* val);
 
/* add delta to *val. Return the new value */
PX_FOUNDATION_API PxI32 PxAtomicAdd(volatile PxI32* val, PxI32 delta);
 
/* compute the maximum of dest and val. Return the new value */
PX_FOUNDATION_API PxI32 PxAtomicMax(volatile PxI32* val, PxI32 val2);
 
#if !PX_DOXYGEN
} // namespace physx
#endif
 
#endif