98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2008-2023 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_TIME_H
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#define PX_TIME_H
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#include "foundation/PxSimpleTypes.h"
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#include "foundation/PxFoundationConfig.h"
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#if PX_LINUX
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#include <time.h>
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#endif
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#if !PX_DOXYGEN
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namespace physx
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{
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#endif
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struct PxCounterFrequencyToTensOfNanos
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{
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PxU64 mNumerator;
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PxU64 mDenominator;
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PxCounterFrequencyToTensOfNanos(PxU64 inNum, PxU64 inDenom) : mNumerator(inNum), mDenominator(inDenom)
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{
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}
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// quite slow.
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PxU64 toTensOfNanos(PxU64 inCounter) const
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{
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return (inCounter * mNumerator) / mDenominator;
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}
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};
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class PX_FOUNDATION_API PxTime
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{
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public:
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typedef PxF64 Second;
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static const PxU64 sNumTensOfNanoSecondsInASecond = 100000000;
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// This is supposedly guaranteed to not change after system boot
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// regardless of processors, speedstep, etc.
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static const PxCounterFrequencyToTensOfNanos& getBootCounterFrequency();
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static PxCounterFrequencyToTensOfNanos getCounterFrequency();
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static PxU64 getCurrentCounterValue();
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// SLOW!!
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// Thar be a 64 bit divide in thar!
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static PxU64 getCurrentTimeInTensOfNanoSeconds()
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{
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PxU64 ticks = getCurrentCounterValue();
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return getBootCounterFrequency().toTensOfNanos(ticks);
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}
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PxTime();
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Second getElapsedSeconds();
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Second peekElapsedSeconds();
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Second getLastTime() const;
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private:
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#if PX_LINUX || PX_APPLE_FAMILY
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Second mLastTime;
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#else
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PxI64 mTickCount;
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#endif
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};
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#if !PX_DOXYGEN
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} // namespace physx
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#endif
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#endif
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