3 * A simple stop watch class. */
6 * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 timer::timer(void) : on(false)
27 getrusage(RUSAGE_SELF, &used1);
28 getrusage(RUSAGE_SELF, &used2);
31 void timer::start(void)
34 getrusage(RUSAGE_SELF, &used1);
35 getrusage(RUSAGE_SELF, &used2);
38 void timer::stop(void)
41 getrusage(RUSAGE_SELF, &used2);
44 void timer::reset(void)
46 getrusage(RUSAGE_SELF, &used1);
47 getrusage(RUSAGE_SELF, &used2);
50 double timer::read(void)
54 getrusage(RUSAGE_SELF, &used2);
55 elapsed = ((used2.ru_utime.tv_sec - used1.ru_utime.tv_sec) +
56 (used2.ru_stime.tv_sec - used1.ru_stime.tv_sec) +
57 (used2.ru_utime.tv_usec - used1.ru_utime.tv_usec) / 1e6 +
58 (used2.ru_stime.tv_usec - used1.ru_stime.tv_usec) / 1e6);
59 // round to 10ms for safety:
60 return 0.01*int(elapsed*100+0.5);
63 bool timer::running(void)