StopWatch.hpp

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//===========================================================================
//
// File: StopWatch.hpp
//
// Created: Thu Jul  2 23:04:17 2009
//
// Author(s): Atgeirr F Rasmussen <atgeirr@sintef.no>
//
// $Date$
//
// $Revision$
//
//===========================================================================
 
/*
  Copyright 2009, 2010 SINTEF ICT, Applied Mathematics.
  Copyright 2009, 2010 Statoil ASA.
 
  This file is part of the Open Porous Media project (OPM).
 
  OPM 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 3 of the License, or
  (at your option) any later version.
 
  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef OPM_STOPWATCH_HEADER
#define OPM_STOPWATCH_HEADER
 
#include <chrono>
 
namespace Opm
{
 
    namespace time
    {
 
    class StopWatch
    {
    public:
        StopWatch();
 
        void start();
        void stop();
 
        double secsSinceLast();
        double secsSinceStart();
 
    private:
        enum class State { UnStarted, Running, Stopped };
            using TimePoint = std::chrono::high_resolution_clock::time_point;
 
            TimePoint currentTime() const;
 
        State state_;
        TimePoint start_time_;
        TimePoint last_time_;
        TimePoint stop_time_;
    };
 
    } // namespace time
 
} // namespace Opm
 
#endif // OPM_STOPWATCH_HEADER