3 * A simple stop watch class. */
6 * GiNaC Copyright (C) 1999-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <sys/resource.h>
29 timer::timer() : on(false)
31 getrusage(RUSAGE_SELF, &used1);
32 used2.ru_utime = used1.ru_utime;
33 used2.ru_stime = used1.ru_stime;
39 getrusage(RUSAGE_SELF, &used1);
40 used2.ru_utime = used1.ru_utime;
41 used2.ru_stime = used1.ru_stime;
47 getrusage(RUSAGE_SELF, &used2);
52 getrusage(RUSAGE_SELF, &used1);
53 used2.ru_utime = used1.ru_utime;
54 used2.ru_stime = used1.ru_stime;
61 getrusage(RUSAGE_SELF, &used2);
62 elapsed = ((used2.ru_utime.tv_sec - used1.ru_utime.tv_sec) +
63 (used2.ru_stime.tv_sec - used1.ru_stime.tv_sec) +
64 (used2.ru_utime.tv_usec - used1.ru_utime.tv_usec) * 1e-6 +
65 (used2.ru_stime.tv_usec - used1.ru_stime.tv_usec) * 1e-6);
66 // Results more accurate than 10ms are pointless:
67 return 0.01*int(elapsed*100+0.5);