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time.Chronograph.h

/*----------------------------------------------------------------------------
  SWORD 2000 - Software With Objects for Rapid Development
  Copyright (C) 2003 Eric NICOLAS
  ----------------------------------------------------------------------------
  SWORD is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  SWORD 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 Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with SWORD; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  --------------------------------------------------------------------------*/
#ifndef _SWORD_TIME_CHRONOGRAPH_
#define _SWORD_TIME_CHRONOGRAPH_

namespace sword {

        class SWORDDECL Chronograph {
        public:

                Chronograph();
                ~Chronograph();


                void clear();


                void start();


                void stop();


                word32 elapsedTimeInMillis();

                /*  More precision is available in the decimal part of the returned 
                 *  value. This method can be called either 'during measurement'
                 *  (between a start() and a stop() ), or 'post morten' (after a stop() ).
                 *  \see elapsedTimeInMillis, start, stop
                 */
                double elapsedTimeInSec();

        private:
                // The two platform-dependant methods
                static int64 now_();   // gets the current timestamp
                static int64 freq_();  // gets the resolution of now()

                int64  start_;
                int64  elapsed_;
                int64  freqInMillis_;
                double freqInSec_;
                bool   active_;
  };

} // namespace sword

#include "sword.private/time.Chronograph.inl"

#endif // _SWORD_TIME_CHRONOGRAPH_

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