--- /dev/null
+
+///////////////////////////////////////////////////////////////////////////
+// This program is free software: you can redistribute it and/or modify //
+// it under the terms of the version 3 of the GNU General Public License //
+// as published by the Free Software Foundation. //
+// //
+// 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, see <http://www.gnu.org/licenses/>. //
+// //
+// Written by Francois Fleuret, (C) IDIAP //
+// Contact <francois.fleuret@idiap.ch> for comments & bug reports //
+///////////////////////////////////////////////////////////////////////////
+
+#include <string.h>
+
+#include "chrono.h"
+
+Chrono::Chrono() : _nb_ticks_per_second(scalar_t(sysconf(_SC_CLK_TCK))),
+ _nb(0), _current(-1) { }
+
+void Chrono::print(ostream *os) {
+ scalar_t total_durations = 0;
+ for(int n = 0; n < _nb; n++) total_durations += _durations[n];
+ for(int n = 0; n < _nb; n++)
+ (*os) << "INFO CHRONO_" << _labels[n]
+ << " " << scalar_t(_durations[n] * 100) / total_durations << "%"
+ << " " << _durations[n] << " seconds"
+ << endl;
+}
+
+void Chrono::start(const char *label) {
+ if(_current >= 0) {
+ struct tms tmp;
+ times(&tmp);
+ _durations[_current] += scalar_t(tmp.tms_stime - _last.tms_stime)/_nb_ticks_per_second;
+ }
+
+ if(label) {
+ _current = 0;
+ while(_current < _nb && strcmp(_labels[_current], label) != 0)
+ _current++;
+ if(_current == _nb) {
+ if(_nb < _nb_max) {
+ strncpy(_labels[_nb], label, buffer_size);
+ _durations[_nb] = 0;
+ _nb++;
+ } else {
+ cerr << "Too many timers." << endl;
+ exit(1);
+ }
+ }
+ } else _current = -1;
+
+ times(&_last);
+}
+
+void Chrono::stop() { start(0); }