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146 lines
2.9 KiB
C++
Executable File
146 lines
2.9 KiB
C++
Executable File
//=====================================================
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// File : portable_timer.hh
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// Author : L. Plagne <laurent.plagne@edf.fr)> from boost lib
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// Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002
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//=====================================================
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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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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// simple_time extracted from the boost library
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//
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#ifndef _PORTABLE_TIMER_HH
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#define _PORTABLE_TIMER_HH
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#include <ctime>
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#include <cstdlib>
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#include <time.h>
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#define USEC_IN_SEC 1000000
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// timer -------------------------------------------------------------------//
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// A timer object measures CPU time.
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#ifdef _MSC_VER
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#define NOMINMAX
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#include <windows.h>
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/*#ifndef hr_timer
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#include "hr_time.h"
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#define hr_timer
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#endif*/
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class Portable_Timer
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{
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public:
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typedef struct {
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LARGE_INTEGER start;
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LARGE_INTEGER stop;
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} stopWatch;
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Portable_Timer()
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{
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startVal.QuadPart = 0;
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stopVal.QuadPart = 0;
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QueryPerformanceFrequency(&frequency);
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}
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void start() { QueryPerformanceCounter(&startVal); }
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void stop() { QueryPerformanceCounter(&stopVal); }
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double elapsed() {
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LARGE_INTEGER time;
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time.QuadPart = stopVal.QuadPart - startVal.QuadPart;
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return LIToSecs(time);
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}
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double user_time() { return elapsed(); }
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private:
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double LIToSecs(LARGE_INTEGER& L) {
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return ((double)L.QuadPart /(double)frequency.QuadPart) ;
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}
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LARGE_INTEGER startVal;
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LARGE_INTEGER stopVal;
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LARGE_INTEGER frequency;
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}; // Portable_Timer
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#else
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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#include <sys/times.h>
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class Portable_Timer
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{
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public:
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Portable_Timer()
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{
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m_clkid = BtlConfig::Instance.realclock ? CLOCK_REALTIME : CLOCK_PROCESS_CPUTIME_ID;
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}
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Portable_Timer(int clkid) : m_clkid(clkid)
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{}
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void start()
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{
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timespec ts;
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clock_gettime(m_clkid, &ts);
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m_start_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
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}
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void stop()
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{
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timespec ts;
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clock_gettime(m_clkid, &ts);
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m_stop_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
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}
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double elapsed()
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{
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return user_time();
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}
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double user_time()
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{
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return m_stop_time - m_start_time;
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}
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private:
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int m_clkid;
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double m_stop_time, m_start_time;
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}; // Portable_Timer
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#endif
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#endif // PORTABLE_TIMER_HPP
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