1 /* <!-- copyright */ 2 /* 3 * aria2 - The high speed download utility 4 * 5 * Copyright (C) 2015 Tatsuhiro Tsujikawa 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 * 21 * In addition, as a special exception, the copyright holders give 22 * permission to link the code of portions of this program with the 23 * OpenSSL library under certain conditions as described in each 24 * individual source file, and distribute linked combinations 25 * including the two. 26 * You must obey the GNU General Public License in all respects 27 * for all of the code used other than OpenSSL. If you modify 28 * file(s) with this exception, you may extend this exception to your 29 * version of the file(s), but you are not obligated to do so. If you 30 * do not wish to do so, delete this exception statement from your 31 * version. If you delete this exception statement from all source 32 * files in the program, then also delete it here. 33 */ 34 /* copyright --> */ 35 #ifndef D_TIMER_A2_H 36 #define D_TIMER_A2_H 37 38 #include "common.h" 39 40 #include <chrono> 41 42 #include "a2time.h" 43 #include "a2functional.h" 44 45 namespace aria2 { 46 47 class Timer { 48 public: 49 using Clock = std::chrono::steady_clock; 50 51 // The time value is initialized so that it represents the time at which 52 // this object was created. 53 Timer(); 54 Timer(const Timer& time) = default; 55 Timer(Timer&& time) = default; 56 57 template <typename duration> Timer(const duration & t)58 constexpr explicit Timer(const duration& t) : tp_(t) 59 { 60 } 61 62 explicit Timer(const Clock::time_point& tp); 63 64 Timer& operator=(Timer&& timer) = default; 65 Timer& operator=(const Timer& timer) = default; 66 67 bool operator<(const Timer& timer) const { return tp_ < timer.tp_; } 68 bool operator>(const Timer& timer) const { return timer < *this; } 69 bool operator<=(const Timer& timer) const { return !(timer < *this); } 70 bool operator>=(const Timer& timer) const { return !(*this < timer); } 71 72 void reset(); 73 reset(const duration & t)74 template <typename duration> void reset(const duration& t) 75 { 76 tp_ = Clock::time_point(t); 77 } 78 79 Clock::duration difference() const; 80 81 Clock::duration difference(const Timer& timer) const; 82 83 // Returns true if this object's time value is zero. 84 bool isZero() const; 85 advance(const duration & t)86 template <typename duration> void advance(const duration& t) { tp_ += t; } 87 sub(const duration & t)88 template <typename duration> void sub(const duration& t) { tp_ -= t; } 89 getTime()90 const Clock::time_point& getTime() const { return tp_; } 91 zero()92 static Timer zero() { return Timer(0_s); } 93 94 private: 95 Clock::time_point tp_; 96 }; 97 98 } // namespace aria2 99 100 #endif // D_TIMER_A2_H 101