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// timer.h -- helper class for time accounting   -*- C++ -*-

// Copyright 2009, 2010 Free Software Foundation, Inc.

// Written by Rafael Avila de Espindola <espindola@google.com>.

// This file is part of gold.

// This program 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.

// This program 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 this program; if not, write to the Free Software

// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

// MA 02110-1301, USA.

#ifndef GOLD_TIMER_H

#define GOLD_TIMER_H

namespace gold

{

class Timer

{

 public:

  // Used to report time statistics. All fields are in milliseconds.

  struct TimeStats

  {

    /* User time in this process.  */

    long user;

    /* System time in this process.  */

    long sys;

    /* Wall clock time.  */

    long wall;

  };

  Timer();

  // Return the stats since start was called.

  TimeStats

  get_elapsed_time();

  // Start counting the time.

  void

  start();

 private:

  // This class cannot be copied.

  Timer(const Timer&);

  Timer& operator=(const Timer&);

  // Write the current time information.

  static void

  get_time(TimeStats* now);

  // The time of the last call to start.

  TimeStats start_time_;

};

}

#endif