| // timer.h -- helper class for time accounting -*- C++ -*- |
| |
| // Copyright (C) 2009-2021 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 |