| // <chrono> -*- C++ -*- |
| |
| // Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library 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, or (at your option) |
| // any later version. |
| |
| // This library 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. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file include/chrono |
| * This is a Standard C++ Library header. |
| */ |
| |
| #ifndef _GLIBCXX_CHRONO |
| #define _GLIBCXX_CHRONO 1 |
| |
| #pragma GCC system_header |
| |
| #ifndef __GXX_EXPERIMENTAL_CXX0X__ |
| # include <bits/c++0x_warning.h> |
| #else |
| |
| #ifdef _GLIBCXX_INCLUDE_AS_TR1 |
| # error C++0x header cannot be included from TR1 header |
| #endif |
| |
| #include <ratio> |
| #include <type_traits> |
| #include <limits> |
| #include <ctime> |
| |
| #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| |
| namespace std |
| { |
| /** |
| * @defgroup chrono Time |
| * @ingroup utilities |
| * |
| * Classes and functions for time. |
| * @{ |
| */ |
| |
| /** @namespace std::chrono |
| * @brief ISO C++ 0x entities sub namespace for time and date. |
| */ |
| namespace chrono |
| { |
| template<typename _Rep, typename _Period = ratio<1>> |
| struct duration; |
| |
| template<typename _Clock, typename _Duration = typename _Clock::duration> |
| struct time_point; |
| } |
| |
| // 20.8.2.3 specialization of common_type (for duration) |
| template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2> |
| struct common_type<chrono::duration<_Rep1, _Period1>, |
| chrono::duration<_Rep2, _Period2>> |
| { |
| typedef chrono::duration<typename common_type<_Rep1, _Rep2>::type, |
| ratio<__static_gcd<_Period1::num, _Period2::num>::value, |
| (_Period1::den / __static_gcd<_Period1::den, _Period2::den>::value) |
| * _Period2::den>> type; |
| }; |
| |
| // 20.8.2.3 specialization of common_type (for time_point) |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| struct common_type<chrono::time_point<_Clock, _Duration1>, |
| chrono::time_point<_Clock, _Duration2>> |
| { |
| typedef chrono::time_point<_Clock, |
| typename common_type<_Duration1, _Duration2>::type> type; |
| }; |
| |
| namespace chrono |
| { |
| // Primary template for duration_cast impl. |
| template<typename _ToDuration, typename _CF, typename _CR, |
| bool _NumIsOne = false, bool _DenIsOne = false> |
| struct __duration_cast_impl |
| { |
| template<typename _Rep, typename _Period> |
| static _ToDuration __cast(const duration<_Rep, _Period>& __d) |
| { |
| return _ToDuration(static_cast< |
| typename _ToDuration::rep>(static_cast<_CR>(__d.count()) |
| * static_cast<_CR>(_CF::num) |
| / static_cast<_CR>(_CF::den))); |
| } |
| }; |
| |
| template<typename _ToDuration, typename _CF, typename _CR> |
| struct __duration_cast_impl<_ToDuration, _CF, _CR, true, true> |
| { |
| template<typename _Rep, typename _Period> |
| static _ToDuration __cast(const duration<_Rep, _Period>& __d) |
| { |
| return _ToDuration( |
| static_cast<typename _ToDuration::rep>(__d.count())); |
| } |
| }; |
| |
| template<typename _ToDuration, typename _CF, typename _CR> |
| struct __duration_cast_impl<_ToDuration, _CF, _CR, true, false> |
| { |
| template<typename _Rep, typename _Period> |
| static _ToDuration __cast(const duration<_Rep, _Period>& __d) |
| { |
| return _ToDuration(static_cast<typename _ToDuration::rep>( |
| static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den))); |
| } |
| }; |
| |
| template<typename _ToDuration, typename _CF, typename _CR> |
| struct __duration_cast_impl<_ToDuration, _CF, _CR, false, true> |
| { |
| template<typename _Rep, typename _Period> |
| static _ToDuration __cast(const duration<_Rep, _Period>& __d) |
| { |
| return _ToDuration(static_cast<typename _ToDuration::rep>( |
| static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num))); |
| } |
| }; |
| |
| template<typename _Tp> |
| struct __is_duration |
| : std::false_type |
| { }; |
| |
| template<typename _Rep, typename _Period> |
| struct __is_duration<duration<_Rep, _Period>> |
| : std::true_type |
| { }; |
| |
| /// duration_cast |
| template<typename _ToDuration, typename _Rep, typename _Period> |
| inline typename enable_if<__is_duration<_ToDuration>::value, |
| _ToDuration>::type |
| duration_cast(const duration<_Rep, _Period>& __d) |
| { |
| typedef typename |
| ratio_divide<_Period, typename _ToDuration::period>::type __cf; |
| typedef typename |
| common_type<typename _ToDuration::rep, _Rep, intmax_t>::type __cr; |
| |
| return __duration_cast_impl<_ToDuration, __cf, __cr, |
| __cf::num == 1, __cf::den == 1>::__cast(__d); |
| } |
| |
| /// treat_as_floating_point |
| template<typename _Rep> |
| struct treat_as_floating_point |
| : is_floating_point<_Rep> |
| { }; |
| |
| /// duration_values |
| template<typename _Rep> |
| struct duration_values |
| { |
| static const _Rep |
| zero() |
| { return _Rep(0); } |
| |
| static const _Rep |
| max() |
| { return numeric_limits<_Rep>::max(); } |
| |
| static const _Rep |
| min() |
| { return numeric_limits<_Rep>::min(); } |
| }; |
| |
| template<typename T> |
| struct __is_ratio |
| : std::false_type |
| { }; |
| |
| template<intmax_t _Num, intmax_t _Den> |
| struct __is_ratio<ratio<_Num, _Den>> |
| : std::true_type |
| { }; |
| |
| /// duration |
| template<typename _Rep, typename _Period> |
| struct duration |
| { |
| static_assert(!__is_duration<_Rep>::value, "rep cannot be a duration"); |
| static_assert(__is_ratio<_Period>::value, |
| "period must be a specialization of ratio"); |
| static_assert(_Period::num > 0, "period must be positive"); |
| |
| typedef _Rep rep; |
| typedef _Period period; |
| |
| // 20.8.3.1 construction / copy / destroy |
| duration() = default; |
| |
| template<typename _Rep2, typename = typename |
| enable_if<is_convertible<_Rep2, rep>::value |
| && (treat_as_floating_point<rep>::value |
| || !treat_as_floating_point<_Rep2>::value)>::type> |
| explicit duration(const _Rep2& __rep) |
| : __r(static_cast<rep>(__rep)) { } |
| |
| template<typename _Rep2, typename _Period2, typename = typename |
| enable_if<treat_as_floating_point<rep>::value |
| || (ratio_divide<_Period2, period>::type::den == 1 |
| && !treat_as_floating_point<_Rep2>::value)>::type> |
| duration(const duration<_Rep2, _Period2>& __d) |
| : __r(duration_cast<duration>(__d).count()) { } |
| |
| ~duration() = default; |
| duration(const duration&) = default; |
| duration& operator=(const duration&) = default; |
| |
| // 20.8.3.2 observer |
| rep |
| count() const |
| { return __r; } |
| |
| // 20.8.3.3 arithmetic |
| duration |
| operator+() const |
| { return *this; } |
| |
| duration |
| operator-() const |
| { return duration(-__r); } |
| |
| duration& |
| operator++() |
| { |
| ++__r; |
| return *this; |
| } |
| |
| duration |
| operator++(int) |
| { return duration(__r++); } |
| |
| duration& |
| operator--() |
| { |
| --__r; |
| return *this; |
| } |
| |
| duration |
| operator--(int) |
| { return duration(__r--); } |
| |
| duration& |
| operator+=(const duration& __d) |
| { |
| __r += __d.count(); |
| return *this; |
| } |
| |
| duration& |
| operator-=(const duration& __d) |
| { |
| __r -= __d.count(); |
| return *this; |
| } |
| |
| duration& |
| operator*=(const rep& __rhs) |
| { |
| __r *= __rhs; |
| return *this; |
| } |
| |
| duration& |
| operator/=(const rep& __rhs) |
| { |
| __r /= __rhs; |
| return *this; |
| } |
| |
| // DR 934. |
| template<typename _Rep2 = rep> |
| typename enable_if<!treat_as_floating_point<_Rep2>::value, |
| duration&>::type |
| operator%=(const rep& __rhs) |
| { |
| __r %= __rhs; |
| return *this; |
| } |
| |
| template<typename _Rep2 = rep> |
| typename enable_if<!treat_as_floating_point<_Rep2>::value, |
| duration&>::type |
| operator%=(const duration& __d) |
| { |
| __r %= __d.count(); |
| return *this; |
| } |
| |
| // 20.8.3.4 special values |
| // TODO: These should be constexprs. |
| static const duration |
| zero() |
| { return duration(duration_values<rep>::zero()); } |
| |
| static const duration |
| min() |
| { return duration(duration_values<rep>::min()); } |
| |
| static const duration |
| max() |
| { return duration(duration_values<rep>::max()); } |
| |
| private: |
| rep __r; |
| }; |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type |
| operator+(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs) += __rhs; |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type |
| operator-(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs) -= __rhs; |
| } |
| |
| template<typename _Rep1, typename _Rep2, bool = |
| is_convertible<_Rep2, |
| typename common_type<_Rep1, _Rep2>::type>::value> |
| struct __common_rep_type { }; |
| |
| template<typename _Rep1, typename _Rep2> |
| struct __common_rep_type<_Rep1, _Rep2, true> |
| { typedef typename common_type<_Rep1, _Rep2>::type type; }; |
| |
| template<typename _Rep1, typename _Period, typename _Rep2> |
| inline duration<typename __common_rep_type<_Rep1, _Rep2>::type, _Period> |
| operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| { |
| typedef typename common_type<_Rep1, _Rep2>::type __cr; |
| return duration<__cr, _Period>(__d) *= __s; |
| } |
| |
| template<typename _Rep1, typename _Period, typename _Rep2> |
| inline duration<typename __common_rep_type<_Rep2, _Rep1>::type, _Period> |
| operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d) |
| { return __d * __s; } |
| |
| template<typename _Rep1, typename _Period, typename _Rep2> |
| inline duration<typename __common_rep_type<_Rep1, typename |
| enable_if<!__is_duration<_Rep2>::value, _Rep2>::type>::type, _Period> |
| operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| { |
| typedef typename common_type<_Rep1, _Rep2>::type __cr; |
| return duration<__cr, _Period>(__d) /= __s; |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline typename common_type<_Rep1, _Rep2>::type |
| operator/(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs).count() / __ct(__rhs).count(); |
| } |
| |
| // DR 934. |
| template<typename _Rep1, typename _Period, typename _Rep2> |
| inline duration<typename __common_rep_type<_Rep1, typename |
| enable_if<!__is_duration<_Rep2>::value, _Rep2>::type>::type, _Period> |
| operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s) |
| { |
| typedef typename common_type<_Rep1, _Rep2>::type __cr; |
| return duration<__cr, _Period>(__d) %= __s; |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type |
| operator%(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs) %= __rhs; |
| } |
| |
| // comparisons |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator==(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs).count() == __ct(__rhs).count(); |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator<(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef typename common_type<duration<_Rep1, _Period1>, |
| duration<_Rep2, _Period2>>::type __ct; |
| return __ct(__lhs).count() < __ct(__rhs).count(); |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator!=(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { return !(__lhs == __rhs); } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator<=(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { return !(__rhs < __lhs); } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator>(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { return __rhs < __lhs; } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Rep2, typename _Period2> |
| inline bool |
| operator>=(const duration<_Rep1, _Period1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { return !(__lhs < __rhs); } |
| |
| /// nanoseconds |
| typedef duration<int64_t, nano> nanoseconds; |
| |
| /// microseconds |
| typedef duration<int64_t, micro> microseconds; |
| |
| /// milliseconds |
| typedef duration<int64_t, milli> milliseconds; |
| |
| /// seconds |
| typedef duration<int64_t > seconds; |
| |
| /// minutes |
| typedef duration<int, ratio< 60>> minutes; |
| |
| /// hours |
| typedef duration<int, ratio<3600>> hours; |
| |
| /// time_point |
| template<typename _Clock, typename _Duration> |
| struct time_point |
| { |
| typedef _Clock clock; |
| typedef _Duration duration; |
| typedef typename duration::rep rep; |
| typedef typename duration::period period; |
| |
| time_point() : __d(duration::zero()) |
| { } |
| |
| explicit time_point(const duration& __dur) |
| : __d(duration::zero() + __dur) |
| { } |
| |
| // conversions |
| template<typename _Duration2> |
| time_point(const time_point<clock, _Duration2>& __t) |
| : __d(__t.time_since_epoch()) |
| { } |
| |
| // observer |
| duration |
| time_since_epoch() const |
| { return __d; } |
| |
| // arithmetic |
| time_point& |
| operator+=(const duration& __dur) |
| { |
| __d += __dur; |
| return *this; |
| } |
| |
| time_point& |
| operator-=(const duration& __dur) |
| { |
| __d -= __dur; |
| return *this; |
| } |
| |
| // special values |
| // TODO: These should be constexprs. |
| static const time_point |
| min() |
| { return time_point(duration::min()); } |
| |
| static const time_point |
| max() |
| { return time_point(duration::max()); } |
| |
| private: |
| duration __d; |
| }; |
| |
| /// time_point_cast |
| template<typename _ToDuration, typename _Clock, typename _Duration> |
| inline typename enable_if<__is_duration<_ToDuration>::value, |
| time_point<_Clock, _ToDuration>>::type |
| time_point_cast(const time_point<_Clock, _Duration>& __t) |
| { |
| return time_point<_Clock, _ToDuration>( |
| duration_cast<_ToDuration>(__t.time_since_epoch())); |
| } |
| |
| template<typename _Clock, typename _Duration1, |
| typename _Rep2, typename _Period2> |
| inline time_point<_Clock, |
| typename common_type<_Duration1, duration<_Rep2, _Period2>>::type> |
| operator+(const time_point<_Clock, _Duration1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { |
| typedef time_point<_Clock, |
| typename common_type<_Duration1, |
| duration<_Rep2, _Period2>>::type> __ct; |
| return __ct(__lhs) += __rhs; |
| } |
| |
| template<typename _Rep1, typename _Period1, |
| typename _Clock, typename _Duration2> |
| inline time_point<_Clock, |
| typename common_type<duration<_Rep1, _Period1>, _Duration2>::type> |
| operator+(const duration<_Rep1, _Period1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return __rhs + __lhs; } |
| |
| template<typename _Clock, typename _Duration1, |
| typename _Rep2, typename _Period2> |
| inline time_point<_Clock, |
| typename common_type<_Duration1, duration<_Rep2, _Period2>>::type> |
| operator-(const time_point<_Clock, _Duration1>& __lhs, |
| const duration<_Rep2, _Period2>& __rhs) |
| { return __lhs + (-__rhs); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline typename common_type<_Duration1, _Duration2>::type |
| operator-(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return __lhs.time_since_epoch() - __rhs.time_since_epoch(); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator==(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return __lhs.time_since_epoch() == __rhs.time_since_epoch(); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator!=(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return !(__lhs == __rhs); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator<(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return __lhs.time_since_epoch() < __rhs.time_since_epoch(); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator<=(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return !(__rhs < __lhs); } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator>(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return __rhs < __lhs; } |
| |
| template<typename _Clock, typename _Duration1, typename _Duration2> |
| inline bool |
| operator>=(const time_point<_Clock, _Duration1>& __lhs, |
| const time_point<_Clock, _Duration2>& __rhs) |
| { return !(__lhs < __rhs); } |
| |
| /// system_clock |
| struct system_clock |
| { |
| #ifdef _GLIBCXX_USE_CLOCK_REALTIME |
| typedef chrono::nanoseconds duration; |
| #elif defined(_GLIBCXX_USE_GETTIMEOFDAY) |
| typedef chrono::microseconds duration; |
| #else |
| typedef chrono::seconds duration; |
| #endif |
| |
| typedef duration::rep rep; |
| typedef duration::period period; |
| typedef chrono::time_point<system_clock, duration> time_point; |
| |
| static const bool is_monotonic = false; |
| |
| static time_point |
| now() throw (); |
| |
| // Map to C API |
| static std::time_t |
| to_time_t(const time_point& __t) |
| { |
| return std::time_t( |
| duration_cast<chrono::seconds>(__t.time_since_epoch()).count()); |
| } |
| |
| static time_point |
| from_time_t(std::time_t __t) |
| { |
| return time_point_cast<system_clock::duration>( |
| chrono::time_point<system_clock, chrono::seconds>( |
| chrono::seconds(__t))); |
| } |
| |
| // TODO: requires constexpr |
| /* |
| static_assert( |
| system_clock::duration::min() < |
| system_clock::duration::zero(), |
| "a clock's minimum duration cannot be less than its epoch"); |
| */ |
| }; |
| |
| #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC |
| /// monotonic_clock |
| struct monotonic_clock |
| { |
| typedef chrono::nanoseconds duration; |
| typedef duration::rep rep; |
| typedef duration::period period; |
| typedef chrono::time_point<monotonic_clock, duration> time_point; |
| |
| static const bool is_monotonic = true; |
| |
| static time_point |
| now(); |
| }; |
| #else |
| typedef system_clock monotonic_clock; |
| #endif |
| |
| typedef system_clock high_resolution_clock; |
| } // namespace chrono |
| |
| // @} group chrono |
| } // namespace std |
| |
| #endif //_GLIBCXX_USE_C99_STDINT_TR1 |
| |
| #endif //__GXX_EXPERIMENTAL_CXX0X__ |
| |
| #endif //_GLIBCXX_CHRONO |
