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// 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"
#include "foundation/PxFoundationConfig.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