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103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/Timer.h
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Copyright (C) 2015
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Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, 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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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef GRID_TIME_H
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#define GRID_TIME_H
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#include <sys/time.h>
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#include <ctime>
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#include <chrono>
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namespace Grid {
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// Dress the output; use std::chrono
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// C++11 time facilities better?
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inline double usecond(void) {
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struct timeval tv;
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#ifdef TIMERS_ON
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gettimeofday(&tv,NULL);
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#endif
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return 1.0*tv.tv_usec + 1.0e6*tv.tv_sec;
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}
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typedef std::chrono::system_clock GridClock;
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typedef std::chrono::time_point<GridClock> GridTimePoint;
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typedef std::chrono::milliseconds GridTime;
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typedef std::chrono::microseconds GridUsecs;
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inline std::ostream& operator<< (std::ostream & stream, const std::chrono::milliseconds & time)
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{
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stream << time.count()<<" ms";
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return stream;
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}
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class GridStopWatch {
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private:
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bool running;
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GridTimePoint start;
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GridUsecs accumulator;
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public:
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GridStopWatch () {
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Reset();
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}
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void Start(void) {
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assert(running == false);
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#ifdef TIMERS_ON
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start = GridClock::now();
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#endif
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running = true;
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}
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void Stop(void) {
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assert(running == true);
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#ifdef TIMERS_ON
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accumulator+= std::chrono::duration_cast<GridUsecs>(GridClock::now()-start);
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#endif
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running = false;
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};
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void Reset(void){
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running = false;
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#ifdef TIMERS_ON
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start = GridClock::now();
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#endif
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accumulator = std::chrono::duration_cast<GridUsecs>(start-start);
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}
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GridTime Elapsed(void) {
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assert(running == false);
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return std::chrono::duration_cast<GridTime>( accumulator );
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}
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uint64_t useconds(void){
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assert(running == false);
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return (uint64_t) accumulator.count();
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}
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};
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}
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#endif
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