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//=====================================================
// File : portable_timer.hh
// Author : L. Plagne <laurent.plagne@edf.fr)> from boost lib
// Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002
//=====================================================
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// simple_time extracted from the boost library
//
#ifndef _PORTABLE_TIMER_HH
#define _PORTABLE_TIMER_HH
#include <ctime>
#include <cstdlib>
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <sys/times.h>
#define USEC_IN_SEC 1000000
// timer -------------------------------------------------------------------//
// A timer object measures CPU time.
// class Portable_Timer
// {
// public:
//
// Portable_Timer( void )
// {
// }
//
//
// void start() { m_val = getTime(); }
//
// void stop() { m_val = getTime() - m_val; }
//
// double elapsed() { return m_val; }
//
// double user_time() { return elapsed(); }
//
//
// private:
//
// static inline double getTime(void)
// {
// struct timeval tv;
// struct timezone tz;
// gettimeofday(&tv, &tz);
// return (double)tv.tv_sec + 1.e-6 * (double)tv.tv_usec;
// }
//
// double m_val;
//
// }; // Portable_Timer
class Portable_Timer
{
public:
Portable_Timer( void ):_utime_sec_start(-1),
_utime_usec_start(-1),
_utime_sec_stop(-1),
_utime_usec_stop(-1)/*,
m_prev_cs(-1)*/
{
}
void start()
{
int status=getrusage(RUSAGE_SELF, &resourcesUsage) ;
// _start_time = std::clock();
_utime_sec_start = resourcesUsage.ru_utime.tv_sec ;
_utime_usec_start = resourcesUsage.ru_utime.tv_usec ;
// m_prev_cs = resourcesUsage.ru_nivcsw;
}
void stop()
{
int status=getrusage(RUSAGE_SELF, &resourcesUsage) ;
// _stop_time = std::clock();
_utime_sec_stop = resourcesUsage.ru_utime.tv_sec ;
_utime_usec_stop = resourcesUsage.ru_utime.tv_usec ;
// m_prev_cs = resourcesUsage.ru_nivcsw - m_prev_cs;
// std::cerr << resourcesUsage.ru_nvcsw << " + " << resourcesUsage.ru_nivcsw << "\n";
}
double elapsed()
{
return user_time();//double(_stop_time - _start_time) / CLOCKS_PER_SEC;
}
double user_time()
{
// std::cout << m_prev_cs << "\n";
long tot_utime_sec=_utime_sec_stop-_utime_sec_start;
long tot_utime_usec=_utime_usec_stop-_utime_usec_start;
return double(tot_utime_sec)+ double(tot_utime_usec)/double(USEC_IN_SEC) ;
}
private:
struct rusage resourcesUsage ;
long _utime_sec_start ;
long _utime_usec_start ;
long _utime_sec_stop ;
long _utime_usec_stop ;
// long m_prev_cs;
std::clock_t _start_time;
std::clock_t _stop_time;
}; // Portable_Timer
#endif // PORTABLE_TIMER_HPP
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