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cycle_timer.h

/*
    Copyright (C) 2002 Paul Davis 

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: cycle_timer.h,v 1.7 2005/05/10 03:13:52 pauld Exp $
*/

#ifndef __ardour_cycle_timer_h__
#define __ardour_cycle_timer_h__

#include <string>
#include <cstdio>

#include <ardour/cycles.h>

using std::string;

class CycleTimer {
  private:
      static float cycles_per_usec;
      uint32_t long entry;
      uint32_t long exit;
      string _name;
      
  public:
      CycleTimer(string name) : _name (name){
            if (cycles_per_usec == 0) {
                  cycles_per_usec = get_mhz ();
            }
            entry = get_cycles();
      }
      ~CycleTimer() {
            exit = get_cycles();
            printf ("%s: %.9f usecs (%lu-%lu)\n", _name.c_str(), (float) (exit - entry) / cycles_per_usec, entry, exit);
      }

      static float get_mhz ();
};

#endif /* __ardour_cycle_timer_h__ */

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