hptimer.hpp

Go to the documentation of this file.

// -*- C++ -*-
/*
  Phrasehunter - index and query text corpora
  Copyright (C) 2006  Torsten Marek (shlomme@gmx.de) &
  Armin Schmidt (armin.sch@gmail.com)
  
  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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

#ifndef HPTIMER_HPP
#define HPTIMER_HPP HPTIMER_HPP

#include <sys/timeb.h>

//! Class to be used for timing in perfomance evaluation.
class hptimer
{
public:
    //! Constructor. Initialize timing.
    hptimer() 
    { restart(); }
    //! Restart this timer.
    void   restart() { _start_time = get_time(); }
    //! Returns the time elapsed since initialization or last restart().
    unsigned long elapsed() const
    { return  get_time() - _start_time; }

private:
    unsigned long get_time() const
    {
        timeb current_time;
        ftime(&current_time);
        return static_cast<unsigned long>(current_time.time) * 1000 + current_time.millitm;
    }
      
    unsigned long _start_time;
}; // hptimer

#endif  // HPTIMER_HPP

---