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/** @file timer.cpp
*
* A simple stop watch class. */
/*
* GiNaC Copyright (C) 1999-2002 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "times.h"
timer::timer(void) : on(false)
{
getrusage(RUSAGE_SELF, &used1);
getrusage(RUSAGE_SELF, &used2);
}
void timer::start(void)
{
on = true;
getrusage(RUSAGE_SELF, &used1);
getrusage(RUSAGE_SELF, &used2);
}
void timer::stop(void)
{
on = false;
getrusage(RUSAGE_SELF, &used2);
}
void timer::reset(void)
{
getrusage(RUSAGE_SELF, &used1);
getrusage(RUSAGE_SELF, &used2);
}
double timer::read(void)
{
double elapsed;
if (this->running())
getrusage(RUSAGE_SELF, &used2);
elapsed = ((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) / 1e6 +
(used2.ru_stime.tv_usec - used1.ru_stime.tv_usec) / 1e6);
// round to 10ms for safety:
return 0.01*int(elapsed*100+0.5);
}
bool timer::running(void)
{
return on;
}
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