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// timer.h -- helper class for time accounting -*- C++ -*-
// Copyright (C) 2009-2017 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();
// Return the stats for pass N (0 <= N <= 2).
TimeStats
get_pass_time(int n);
// Start counting the time.
void
start();
// Record the time used by pass N (0 <= N <= 2).
void
stamp(int n);
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_;
// Times for each pass.
TimeStats pass_times_[3];
};
}
#endif
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