xapian-core/tests/harness/cputimer.h

   1 /** @file cputimer.h
   2  * @brief Measure CPU time.
   3  */
   4 /* Copyright (C) 2009 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifndef XAPIAN_INCLUDED_CPUTIMER_H
  22 #define XAPIAN_INCLUDED_CPUTIMER_H
  23
  24 class CPUTimer {
  25     double start;
  26
  27     double get_current_cputime() const;
  28
  29   public:
  30     /// Start the timer.
  31     CPUTimer() : start(get_current_cputime()) { }
  32
  33     /// Return elapsed CPU time since object creation in seconds.
  34     double get_time() const {
  35         return get_current_cputime() - start;
  36     }
  37 };
  38
  39 #endif // XAPIAN_INCLUDED_CPUTIMER_H