| // |
| // Copyright 2019 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| // Timer.cpp: Implementation of a high precision timer class. |
| // |
| |
| #include "util/Timer.h" |
| |
| #include "common/debug.h" |
| #include "common/system_utils.h" |
| |
| Timer::Timer() |
| : mRunning(false), mStartTime(0.0), mStopTime(0.0), mStartCpuTime(0.0), mStopCpuTime(0.0) |
| {} |
| |
| void Timer::start() |
| { |
| ASSERT(!mRunning); |
| restart(); |
| } |
| |
| void Timer::restart() |
| { |
| mStartTime = angle::GetCurrentSystemTime(); |
| mStartCpuTime = angle::GetCurrentProcessCpuTime(); |
| mRunning = true; |
| } |
| |
| void Timer::stop() |
| { |
| ASSERT(mRunning); |
| mStopTime = angle::GetCurrentSystemTime(); |
| mStopCpuTime = angle::GetCurrentProcessCpuTime(); |
| mRunning = false; |
| } |
| |
| double Timer::getElapsedWallClockTime() const |
| { |
| double endTime; |
| if (mRunning) |
| { |
| endTime = angle::GetCurrentSystemTime(); |
| } |
| else |
| { |
| endTime = mStopTime; |
| } |
| |
| return endTime - mStartTime; |
| } |
| |
| double Timer::getElapsedCpuTime() const |
| { |
| double endTime; |
| if (mRunning) |
| { |
| endTime = angle::GetCurrentProcessCpuTime(); |
| } |
| else |
| { |
| endTime = mStopCpuTime; |
| } |
| |
| return endTime - mStartCpuTime; |
| } |