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/** @file timer.cpp
*
* A simple stop watch class. */
/*
* GiNaC Copyright (C) 1999-2025 Johannes Gutenberg University Mainz, Germany
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_RUSAGE
#include <sys/resource.h>
#include <sys/time.h>
#else
#include <ctime>
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "timer.h"
timer::timer() : on(false)
{
#ifdef HAVE_RUSAGE
getrusage(RUSAGE_SELF, &used1);
used2.ru_utime = used1.ru_utime;
used2.ru_stime = used1.ru_stime;
#else
used1 = clock();
used2 = used1;
#endif
}
void timer::start()
{
on = true;
#ifdef HAVE_RUSAGE
getrusage(RUSAGE_SELF, &used1);
used2.ru_utime = used1.ru_utime;
used2.ru_stime = used1.ru_stime;
#else
used1 = clock();
used2 = used1;
#endif
}
void timer::stop()
{
on = false;
#ifdef HAVE_RUSAGE
getrusage(RUSAGE_SELF, &used2);
#else
used2 = clock();
#endif
}
void timer::reset()
{
#ifdef HAVE_RUSAGE
getrusage(RUSAGE_SELF, &used1);
used2.ru_utime = used1.ru_utime;
used2.ru_stime = used1.ru_stime;
#else
used1 = clock();
used2 = used1;
#endif
}
double timer::read()
{
#ifdef HAVE_RUSAGE
if (running())
getrusage(RUSAGE_SELF, &used2);
return ((used2.ru_utime.tv_sec - used1.ru_utime.tv_sec) +
(used2.ru_stime.tv_sec - used1.ru_stime.tv_sec) +
(used2.ru_utime.tv_usec - used1.ru_utime.tv_usec) * 1e-6 +
(used2.ru_stime.tv_usec - used1.ru_stime.tv_usec) * 1e-6);
#else
if (running())
used2 = clock();
return double(used2 - used1)/CLOCKS_PER_SEC;
#endif
}
bool timer::running()
{
return on;
}
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