| 1 | // timer.h -- helper class for time accounting -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2009-2018 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 | |
| 26 | namespace gold |
| 27 | { |
| 28 | |
| 29 | class 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 | // Return the stats for pass N (0 <= N <= 2). |
| 52 | TimeStats |
| 53 | get_pass_time(int n); |
| 54 | |
| 55 | // Start counting the time. |
| 56 | void |
| 57 | start(); |
| 58 | |
| 59 | // Record the time used by pass N (0 <= N <= 2). |
| 60 | void |
| 61 | stamp(int n); |
| 62 | |
| 63 | private: |
| 64 | // This class cannot be copied. |
| 65 | Timer(const Timer&); |
| 66 | Timer& operator=(const Timer&); |
| 67 | |
| 68 | // Write the current time information. |
| 69 | static void |
| 70 | get_time(TimeStats* now); |
| 71 | |
| 72 | // The time of the last call to start. |
| 73 | TimeStats start_time_; |
| 74 | |
| 75 | // Times for each pass. |
| 76 | TimeStats pass_times_[3]; |
| 77 | }; |
| 78 | |
| 79 | } |
| 80 | #endif |