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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2008-2018 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_PSTIME_H
#define PSFOUNDATION_PSTIME_H
#include "Ps.h"
#if PX_LINUX || PX_ANDROID
#include <time.h>
#endif
namespace physx
{
namespace shdfnd
{
struct CounterFrequencyToTensOfNanos
{
uint64_t mNumerator;
uint64_t mDenominator;
CounterFrequencyToTensOfNanos(uint64_t inNum, uint64_t inDenom) : mNumerator(inNum), mDenominator(inDenom)
{
}
// quite slow.
uint64_t toTensOfNanos(uint64_t inCounter) const
{
return (inCounter * mNumerator) / mDenominator;
}
};
class PX_FOUNDATION_API Time
{
public:
typedef double Second;
static const uint64_t sNumTensOfNanoSecondsInASecond = 100000000;
// This is supposedly guaranteed to not change after system boot
// regardless of processors, speedstep, etc.
static const CounterFrequencyToTensOfNanos& getBootCounterFrequency();
static CounterFrequencyToTensOfNanos getCounterFrequency();
static uint64_t getCurrentCounterValue();
// SLOW!!
// Thar be a 64 bit divide in thar!
static uint64_t getCurrentTimeInTensOfNanoSeconds()
{
uint64_t ticks = getCurrentCounterValue();
return getBootCounterFrequency().toTensOfNanos(ticks);
}
Time();
Second getElapsedSeconds();
Second peekElapsedSeconds();
Second getLastTime() const;
private:
#if PX_LINUX || PX_ANDROID || PX_APPLE_FAMILY || PX_PS4
Second mLastTime;
#else
int64_t mTickCount;
#endif
};
} // namespace shdfnd
} // namespace physx
#endif // #ifndef PSFOUNDATION_PSTIME_H
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