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https://github.com/godotengine/godot-angle-static.git
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5b2545bf24
Changes to CLOCK_MONOTONIC as CLOCK_PROCESS_CPUTIME counts only user time and not kernel time. BUG=angleproject:892 Change-Id: I3d5aee26ee2bacd7449fdd7795ad8c2b289d7324 Reviewed-on: https://chromium-review.googlesource.com/272652 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>
50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
//
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// Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// LinuxTimer.cpp: Implementation of a high precision timer class on Linux
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#include "linux/LinuxTimer.h"
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#include <iostream>
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LinuxTimer::LinuxTimer()
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: mRunning(false)
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{
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}
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void LinuxTimer::start()
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{
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clock_gettime(CLOCK_MONOTONIC, &mStartTime);
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mRunning = true;
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}
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void LinuxTimer::stop()
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{
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clock_gettime(CLOCK_MONOTONIC, &mStopTime);
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mRunning = false;
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}
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double LinuxTimer::getElapsedTime() const
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{
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struct timespec endTime;
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if (mRunning)
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{
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clock_gettime(CLOCK_MONOTONIC, &endTime);
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}
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else
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{
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endTime = mStopTime;
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}
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double startSeconds = mStartTime.tv_sec + (1.0 / 1000000000) * mStartTime.tv_nsec;
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double endSeconds = endTime.tv_sec + (1.0 / 1000000000) * endTime.tv_nsec;
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return endSeconds - startSeconds;
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}
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Timer *CreateTimer()
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{
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return new LinuxTimer();
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}
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