108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
/*******************************************************************************
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Copyright (c) 2005-20013 David Williams and Matthew Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#include "PolyVoxCore/Impl/Timer.h"
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#include "PolyVoxCore/Impl/ErrorHandling.h"
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#include <iostream>
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namespace PolyVox
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{
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#if defined(_MSC_VER)
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Timer::Timer(bool bAutoStart)
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:m_fPCFreq(0.0)
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,m_iStartTime(0)
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{
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if(bAutoStart)
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{
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start();
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}
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}
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void Timer::start(void)
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{
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LARGE_INTEGER li;
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if(!QueryPerformanceFrequency(&li))
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{
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logWarning() << "QueryPerformanceFrequency failed!";
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m_fPCFreq = 1.0f;
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}
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m_fPCFreq = double(li.QuadPart);
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QueryPerformanceCounter(&li);
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m_iStartTime = li.QuadPart;
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}
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float Timer::elapsedTimeInSeconds(void)
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{
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LARGE_INTEGER li;
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QueryPerformanceCounter(&li);
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double fDifference = static_cast<double>(li.QuadPart-m_iStartTime);
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return static_cast<float>(fDifference / m_fPCFreq);
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}
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uint32_t Timer::elapsedTimeInMilliSeconds(void)
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{
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return static_cast<uint32_t>(elapsedTimeInSeconds() * 1000.0f);
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}
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uint32_t Timer::elapsedTimeInMicroSeconds(void)
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{
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return static_cast<uint32_t>(elapsedTimeInSeconds() * 1000000.0f);
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}
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#else //_MSC_VER
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Timer::Timer(bool bAutoStart)
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{
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if(bAutoStart)
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{
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start();
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}
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}
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void Timer::start(void)
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{
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m_start = clock::now();
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}
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float Timer::elapsedTimeInSeconds(void)
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{
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std::chrono::duration<float> elapsed_seconds = clock::now() - m_start;
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return elapsed_seconds.count();
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}
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uint32_t Timer::elapsedTimeInMilliSeconds(void)
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{
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std::chrono::duration<float, std::milli> elapsed_milliseconds = clock::now() - m_start;
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return elapsed_milliseconds.count();
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}
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uint32_t Timer::elapsedTimeInMicroSeconds(void)
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{
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std::chrono::duration<float, std::micro> elapsed_microseconds = clock::now() - m_start;
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return elapsed_microseconds.count();
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}
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#endif //_MSC_VER
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}
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