adaptive_skip.H

/*
 * This file is part of the "Archon" framework.
 * (http://files3d.sourceforge.net)
 *
 * Copyright © 2002 by Kristian Spangsege and Brian Kristiansen.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation under the terms of the GNU General Public License is
 * hereby granted. No representations are made about the suitability of
 * this software for any purpose. It is provided "as is" without express
 * or implied warranty. See the GNU General Public License
 * (http://www.gnu.org/copyleft/gpl.html) for more details.
 *
 * The characters in this file are ISO8859-1 encoded.
 *
 * The documentation in this file is in "Doxygen" style
 * (http://www.doxygen.org).
 */

#ifndef ARCHON_UTILITIES_ADAPTIVE_SKIP_H
#define ARCHON_UTILITIES_ADAPTIVE_SKIP_H

// ANSI-C++ headers:
#include <string>

#include <archon/util/exception.H>

namespace Archon
{
  namespace Utilities
  {
    struct AdaptiveSkip
    {
      AdaptiveSkip(unsigned long millisBetweenOutTicks,
                   unsigned long checksPerOutTick = 10);
      bool tick() { return ++skippedTicks == ticksPerCheck && check(); }

    protected:
      unsigned long timeOfLastCheck;
      unsigned long timeOfLastOutTick;

    private:
      unsigned long millisBetweenOutTicks;
      unsigned long checksPerOutTick;
      unsigned long skippedTicks;
      unsigned long ticksPerCheck;

      unsigned long getTimeInMilliSeconds();
      bool check();
    };
  }
}

#endif // ARCHON_UTILITIES_ADAPTIVE_SKIP_H

---