136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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* 2017 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file profile.h:
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* @brief Simple profiling functions for measuring code execution time.
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*/
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#ifndef __TPROFILE_H
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#define __TPROFILE_H
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#include <chrono>
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#include <string>
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#include <iostream>
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#include <iomanip>
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/**
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* The class PROF_COUNTER is a small class to help profiling.
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* It allows the calculation of the elapsed time (in millisecondes) between
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* its creation (or the last call to Start() ) and the last call to Stop()
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*/
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class PROF_COUNTER
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{
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public:
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/**
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* Creates a PROF_COUNTER for measuring an elapsed time in milliseconds
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* @param aName = a string that will be printed in message.
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* @param aAutostart = true (default) to immediately start the timer
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*/
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PROF_COUNTER( const std::string& aName, bool aAutostart = true ) :
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m_name( aName ), m_running( false )
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{
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if( aAutostart )
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Start();
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}
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/**
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* Creates a PROF_COUNTER for measuring an elapsed time in milliseconds
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* The counter is started and the string to print in message is left empty.
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*/
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PROF_COUNTER()
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{
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Start();
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}
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/**
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* Starts or restarts the counter
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*/
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void Start()
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{
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m_running = true;
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m_starttime = std::chrono::system_clock::now();
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}
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/**
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* save the time when this function was called, and set the counter stane to stop
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*/
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void Stop()
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{
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if( !m_running )
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return;
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m_stoptime = std::chrono::system_clock::now();
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}
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/**
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* Print the elapsed time (in ms) to STDERR.
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*/
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void Show()
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{
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TIME_POINT display_stoptime = m_running ?
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std::chrono::system_clock::now() :
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m_stoptime;
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std::chrono::duration<double, std::milli> elapsed = display_stoptime - m_starttime;
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std::cerr << m_name << " took " << elapsed.count() << " milliseconds." << std::endl;
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}
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/**
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* @return the elapsed time in ms
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*/
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double msecs() const
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{
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TIME_POINT stoptime = m_running ?
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std::chrono::system_clock::now() :
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m_stoptime;
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std::chrono::duration<double, std::milli> elapsed = stoptime - m_starttime;
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return elapsed.count();
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}
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private:
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std::string m_name; // a string printed in message
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bool m_running;
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typedef std::chrono::time_point<std::chrono::high_resolution_clock> TIME_POINT;
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TIME_POINT m_starttime, m_stoptime;
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};
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/**
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* Function GetRunningMicroSecs
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* An alternate way to calculate an elapset time (in microsecondes) to class PROF_COUNTER
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* @return an ever increasing indication of elapsed microseconds.
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* Use this by computing differences between two calls.
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* @author Dick Hollenbeck
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*/
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unsigned GetRunningMicroSecs();
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#endif
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