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physx/source/foundation/src/unix/PsUnixTime.cpp

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+//
+// 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.
+
+#include "Ps.h"
+#include "PsTime.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
+{
+namespace shdfnd
+{
+
+static const CounterFrequencyToTensOfNanos gCounterFreq = Time::getCounterFrequency();
+
+const CounterFrequencyToTensOfNanos& Time::getBootCounterFrequency()
+{
+	return gCounterFreq;
+}
+
+static Time::Second getTimeSeconds()
+{
+	static struct timeval _tv;
+	gettimeofday(&_tv, NULL);
+	return double(_tv.tv_sec) + double(_tv.tv_usec) * 0.000001;
+}
+
+Time::Time()
+{
+	mLastTime = getTimeSeconds();
+}
+
+Time::Second Time::getElapsedSeconds()
+{
+	Time::Second curTime = getTimeSeconds();
+	Time::Second diff = curTime - mLastTime;
+	mLastTime = curTime;
+	return diff;
+}
+
+Time::Second Time::peekElapsedSeconds()
+{
+	Time::Second curTime = getTimeSeconds();
+	Time::Second diff = curTime - mLastTime;
+	return diff;
+}
+
+Time::Second Time::getLastTime() const
+{
+	return mLastTime;
+}
+
+#if PX_APPLE_FAMILY
+CounterFrequencyToTensOfNanos Time::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 CounterFrequencyToTensOfNanos(info.numer, info.denom * 10);
+}
+
+uint64_t Time::getCurrentCounterValue()
+{
+	return mach_absolute_time();
+}
+
+#else
+
+CounterFrequencyToTensOfNanos Time::getCounterFrequency()
+{
+	return CounterFrequencyToTensOfNanos(1, 10);
+}
+
+uint64_t Time::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 shdfnd
+} // namespace physx