1// timer.h -- helper class for time accounting   -*- C++ -*-
2
3// Copyright 2009 Free Software Foundation, Inc.
4// Written by Rafael Avila de Espindola <espindola@google.com>.
5
6// This file is part of gold.
7
8// This program is free software; you can redistribute it and/or modify
9// it under the terms of the GNU General Public License as published by
10// the Free Software Foundation; either version 3 of the License, or
11// (at your option) any later version.
12
13// This program is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16// GNU General Public License for more details.
17
18// You should have received a copy of the GNU General Public License
19// along with this program; if not, write to the Free Software
20// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21// MA 02110-1301, USA.
22
23#ifndef GOLD_TIMER_H
24#define GOLD_TIMER_H
25
26namespace gold
27{
28
29class Timer
30{
31 public:
32  // Used to report time statistics. All fields are in milliseconds.
33  struct TimeStats
34  {
35    /* User time in this process.  */
36    long user;
37
38    /* System time in this process.  */
39    long sys;
40
41    /* Wall clock time.  */
42    long wall;
43  };
44
45  Timer();
46
47  // Return the stats since start was called.
48  TimeStats
49  get_elapsed_time();
50
51  // Start couting the time.
52  void
53  start();
54
55 private:
56  // This class cannot be copied.
57  Timer(const Timer&);
58  Timer& operator=(const Timer&);
59
60  // Write the current time infortamion.
61  static void
62  get_time(TimeStats* now);
63
64  // The time of the last call to start.
65  TimeStats start_time_;
66};
67
68}
69#endif
70