tk11/clock.hpp

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//          Copyright Florian Winter 2010 - 2010.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#ifndef TK11_CLOCK_HPP
#define TK11_CLOCK_HPP

#include "time.hpp"

#include <boost/optional.hpp>

namespace tk11 {


  class Precision_Clock {
  public:
    typedef Duration time_type;

    Precision_Clock();

    time_type operator()() const;

  private:
    boost::int_least64_t frequency;

    boost::int_least64_t start_counter;
  };



  class Secondary_Clock {
  public:
    typedef Duration input_time_type;

    typedef Duration time_type;


    Secondary_Clock(const time_type& start_time = seconds(0));


    time_type operator()() const {
      return current_time;
    }


    void update(const input_time_type& now);


    void pause();


    void resume();

  private:
    time_type current_time;

    boost::optional<input_time_type> last_time;

    bool paused;
  };

}

#endif

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