Revision control
- //
- // 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) 2008-2021 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"
- #include "foundation/PxFoundationConfig.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