timer.hpp

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
  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 2 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/>.

  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/
#ifndef OPM_TIMER_HPP
#define OPM_TIMER_HPP

#include <chrono>

namespace Opm {

class Timer
{
    struct TimeData
    {
        std::chrono::high_resolution_clock::time_point realtimeData;
        std::clock_t cputimeData;

        // measure the current time and put it into the object.
        void measure();
    };

public:
    Timer();

    void start();

    double stop();

    void halt();

    void reset();

    double realTimeElapsed() const;

    double elapsed() const
    { return realTimeElapsed(); }

    double cpuTimeElapsed() const;

    double globalCpuTimeElapsed() const;

    Timer& operator+=(const Timer& other);

private:
    bool isStopped_;
    double cpuTimeElapsed_;
    double realTimeElapsed_;
    TimeData startTime_;
};

} // namespace Opm

#endif // OPM_TIMER_HPP