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// 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
#ifndef PX_TIME_H
#define PX_TIME_H
#include "foundation/PxSimpleTypes.h"
#include "foundation/PxFoundationConfig.h"
#if PX_LINUX
#include <time.h>
#endif
#if !PX_DOXYGEN
namespace physx
{
#endif
struct PxCounterFrequencyToTensOfNanos
{
PxU64 mNumerator;
PxU64 mDenominator;
PxCounterFrequencyToTensOfNanos(PxU64 inNum, PxU64 inDenom) : mNumerator(inNum), mDenominator(inDenom)
{
}
// quite slow.
PxU64 toTensOfNanos(PxU64 inCounter) const
{
return (inCounter * mNumerator) / mDenominator;
}
};
class PX_FOUNDATION_API PxTime
{
public:
typedef PxF64 Second;
static const PxU64 sNumTensOfNanoSecondsInASecond = 100000000;
// This is supposedly guaranteed to not change after system boot
// regardless of processors, speedstep, etc.
static const PxCounterFrequencyToTensOfNanos& getBootCounterFrequency();
static PxCounterFrequencyToTensOfNanos getCounterFrequency();
static PxU64 getCurrentCounterValue();
// SLOW!!
// Thar be a 64 bit divide in thar!
static PxU64 getCurrentTimeInTensOfNanoSeconds()
{
PxU64 ticks = getCurrentCounterValue();
return getBootCounterFrequency().toTensOfNanos(ticks);
}
PxTime();
Second getElapsedSeconds();
Second peekElapsedSeconds();
Second getLastTime() const;
private:
#if PX_LINUX || PX_APPLE_FAMILY
Second mLastTime;
#else
PxI64 mTickCount;
#endif
};
#if !PX_DOXYGEN
} // namespace physx
#endif
#endif