Revision control
++ // 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
++
++ #include "foundation/PxTime.h"
++
++ #include <time.h>
++ #include <sys/time.h>
++
++ #if PX_APPLE_FAMILY
++ #include <mach/mach_time.h>
++ #endif
++
++ // Use real-time high-precision timer.
++ #if !PX_APPLE_FAMILY
++ #define CLOCKID CLOCK_REALTIME
++ #endif
++
++ namespace physx
++ {
++
++ static const PxCounterFrequencyToTensOfNanos gCounterFreq = PxTime::getCounterFrequency();
++
++ const PxCounterFrequencyToTensOfNanos& PxTime::getBootCounterFrequency()
++ {
++ return gCounterFreq;
++ }
++
++ static PxTime::Second getTimeSeconds()
++ {
++ static struct timeval _tv;
++ gettimeofday(&_tv, NULL);
++ return double(_tv.tv_sec) + double(_tv.tv_usec) * 0.000001;
++ }
++
++ PxTime::PxTime()
++ {
++ mLastTime = getTimeSeconds();
++ }
++
++ PxTime::Second PxTime::getElapsedSeconds()
++ {
++ PxTime::Second curTime = getTimeSeconds();
++ PxTime::Second diff = curTime - mLastTime;
++ mLastTime = curTime;
++ return diff;
++ }
++
++ PxTime::Second PxTime::peekElapsedSeconds()
++ {
++ PxTime::Second curTime = getTimeSeconds();
++ PxTime::Second diff = curTime - mLastTime;
++ return diff;
++ }
++
++ PxTime::Second PxTime::getLastTime() const
++ {
++ return mLastTime;
++ }
++
++ #if PX_APPLE_FAMILY
++ PxCounterFrequencyToTensOfNanos PxTime::getCounterFrequency()
++ {
++ mach_timebase_info_data_t info;
++ mach_timebase_info(&info);
++ // mach_absolute_time * (info.numer/info.denom) is in units of nano seconds
++ return PxCounterFrequencyToTensOfNanos(info.numer, info.denom * 10);
++ }
++
++ uint64_t PxTime::getCurrentCounterValue()
++ {
++ return mach_absolute_time();
++ }
++
++ #else
++
++ PxCounterFrequencyToTensOfNanos PxTime::getCounterFrequency()
++ {
++ return PxCounterFrequencyToTensOfNanos(1, 10);
++ }
++
++ uint64_t PxTime::getCurrentCounterValue()
++ {
++ struct timespec mCurrTimeInt;
++ clock_gettime(CLOCKID, &mCurrTimeInt);
++ // Convert to nanos as this doesn't cause a large divide here
++ return (static_cast<uint64_t>(mCurrTimeInt.tv_sec) * 1000000000) + (static_cast<uint64_t>(mCurrTimeInt.tv_nsec));
++ }
++ #endif
++
++ } // namespace physx