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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___CHRONO_DURATION_H11#define _LIBCPP___CXX03___CHRONO_DURATION_H12 13#include <__cxx03/__config>14#include <__cxx03/__type_traits/common_type.h>15#include <__cxx03/__type_traits/enable_if.h>16#include <__cxx03/__type_traits/is_convertible.h>17#include <__cxx03/__type_traits/is_floating_point.h>18#include <__cxx03/limits>19#include <__cxx03/ratio>20 21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)22# pragma GCC system_header23#endif24 25_LIBCPP_PUSH_MACROS26#include <__cxx03/__undef_macros>27 28_LIBCPP_BEGIN_NAMESPACE_STD29 30namespace chrono {31 32template <class _Rep, class _Period = ratio<1> >33class _LIBCPP_TEMPLATE_VIS duration;34 35template <class _Tp>36struct __is_duration : false_type {};37 38template <class _Rep, class _Period>39struct __is_duration<duration<_Rep, _Period> > : true_type {};40 41template <class _Rep, class _Period>42struct __is_duration<const duration<_Rep, _Period> > : true_type {};43 44template <class _Rep, class _Period>45struct __is_duration<volatile duration<_Rep, _Period> > : true_type {};46 47template <class _Rep, class _Period>48struct __is_duration<const volatile duration<_Rep, _Period> > : true_type {};49 50} // namespace chrono51 52template <class _Rep1, class _Period1, class _Rep2, class _Period2>53struct _LIBCPP_TEMPLATE_VIS common_type<chrono::duration<_Rep1, _Period1>, chrono::duration<_Rep2, _Period2> > {54 typedef chrono::duration<typename common_type<_Rep1, _Rep2>::type, typename __ratio_gcd<_Period1, _Period2>::type>55 type;56};57 58namespace chrono {59 60// duration_cast61 62template <class _FromDuration,63 class _ToDuration,64 class _Period = typename ratio_divide<typename _FromDuration::period, typename _ToDuration::period>::type,65 bool = _Period::num == 1,66 bool = _Period::den == 1>67struct __duration_cast;68 69template <class _FromDuration, class _ToDuration, class _Period>70struct __duration_cast<_FromDuration, _ToDuration, _Period, true, true> {71 _LIBCPP_HIDE_FROM_ABI _ToDuration operator()(const _FromDuration& __fd) const {72 return _ToDuration(static_cast<typename _ToDuration::rep>(__fd.count()));73 }74};75 76template <class _FromDuration, class _ToDuration, class _Period>77struct __duration_cast<_FromDuration, _ToDuration, _Period, true, false> {78 _LIBCPP_HIDE_FROM_ABI _ToDuration operator()(const _FromDuration& __fd) const {79 typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;80 return _ToDuration(81 static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) / static_cast<_Ct>(_Period::den)));82 }83};84 85template <class _FromDuration, class _ToDuration, class _Period>86struct __duration_cast<_FromDuration, _ToDuration, _Period, false, true> {87 _LIBCPP_HIDE_FROM_ABI _ToDuration operator()(const _FromDuration& __fd) const {88 typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;89 return _ToDuration(90 static_cast<typename _ToDuration::rep>(static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num)));91 }92};93 94template <class _FromDuration, class _ToDuration, class _Period>95struct __duration_cast<_FromDuration, _ToDuration, _Period, false, false> {96 _LIBCPP_HIDE_FROM_ABI _ToDuration operator()(const _FromDuration& __fd) const {97 typedef typename common_type<typename _ToDuration::rep, typename _FromDuration::rep, intmax_t>::type _Ct;98 return _ToDuration(static_cast<typename _ToDuration::rep>(99 static_cast<_Ct>(__fd.count()) * static_cast<_Ct>(_Period::num) / static_cast<_Ct>(_Period::den)));100 }101};102 103template <class _ToDuration, class _Rep, class _Period, __enable_if_t<__is_duration<_ToDuration>::value, int> = 0>104inline _LIBCPP_HIDE_FROM_ABI _ToDuration duration_cast(const duration<_Rep, _Period>& __fd) {105 return __duration_cast<duration<_Rep, _Period>, _ToDuration>()(__fd);106}107 108template <class _Rep>109struct _LIBCPP_TEMPLATE_VIS treat_as_floating_point : is_floating_point<_Rep> {};110 111// clang-format off112template <class _Rep>113struct _LIBCPP_TEMPLATE_VIS duration_values {114public:115 _LIBCPP_HIDE_FROM_ABI static _Rep zero() _NOEXCEPT { return _Rep(0); }116 _LIBCPP_HIDE_FROM_ABI static _Rep max() _NOEXCEPT { return numeric_limits<_Rep>::max(); }117 _LIBCPP_HIDE_FROM_ABI static _Rep min() _NOEXCEPT { return numeric_limits<_Rep>::lowest(); }118};119// clang-format on120 121// duration122 123template <class _Rep, class _Period>124class _LIBCPP_TEMPLATE_VIS duration {125 static_assert(!__is_duration<_Rep>::value, "A duration representation can not be a duration");126 static_assert(__is_ratio<_Period>::value, "Second template parameter of duration must be a std::ratio");127 static_assert(_Period::num > 0, "duration period must be positive");128 129 template <class _R1, class _R2>130 struct __no_overflow {131 private:132 static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;133 static const intmax_t __gcd_d1_d2 = __static_gcd<_R1::den, _R2::den>::value;134 static const intmax_t __n1 = _R1::num / __gcd_n1_n2;135 static const intmax_t __d1 = _R1::den / __gcd_d1_d2;136 static const intmax_t __n2 = _R2::num / __gcd_n1_n2;137 static const intmax_t __d2 = _R2::den / __gcd_d1_d2;138 static const intmax_t max = -((intmax_t(1) << (sizeof(intmax_t) * CHAR_BIT - 1)) + 1);139 140 template <intmax_t _Xp, intmax_t _Yp, bool __overflow>141 struct __mul // __overflow == false142 {143 static const intmax_t value = _Xp * _Yp;144 };145 146 template <intmax_t _Xp, intmax_t _Yp>147 struct __mul<_Xp, _Yp, true> {148 static const intmax_t value = 1;149 };150 151 public:152 static const bool value = (__n1 <= max / __d2) && (__n2 <= max / __d1);153 typedef ratio<__mul<__n1, __d2, !value>::value, __mul<__n2, __d1, !value>::value> type;154 };155 156public:157 typedef _Rep rep;158 typedef typename _Period::type period;159 160private:161 rep __rep_;162 163public:164 _LIBCPP_HIDE_FROM_ABI duration() {}165 166 template <class _Rep2,167 __enable_if_t<is_convertible<const _Rep2&, rep>::value &&168 (treat_as_floating_point<rep>::value || !treat_as_floating_point<_Rep2>::value),169 int> = 0>170 _LIBCPP_HIDE_FROM_ABI explicit duration(const _Rep2& __r) : __rep_(__r) {}171 172 // conversions173 template <class _Rep2,174 class _Period2,175 __enable_if_t<__no_overflow<_Period2, period>::value && (treat_as_floating_point<rep>::value ||176 (__no_overflow<_Period2, period>::type::den == 1 &&177 !treat_as_floating_point<_Rep2>::value)),178 int> = 0>179 _LIBCPP_HIDE_FROM_ABI duration(const duration<_Rep2, _Period2>& __d)180 : __rep_(chrono::duration_cast<duration>(__d).count()) {}181 182 // observer183 184 _LIBCPP_HIDE_FROM_ABI rep count() const { return __rep_; }185 186 // arithmetic187 188 _LIBCPP_HIDE_FROM_ABI typename common_type<duration>::type operator+() const {189 return typename common_type<duration>::type(*this);190 }191 _LIBCPP_HIDE_FROM_ABI typename common_type<duration>::type operator-() const {192 return typename common_type<duration>::type(-__rep_);193 }194 _LIBCPP_HIDE_FROM_ABI duration& operator++() {195 ++__rep_;196 return *this;197 }198 _LIBCPP_HIDE_FROM_ABI duration operator++(int) { return duration(__rep_++); }199 _LIBCPP_HIDE_FROM_ABI duration& operator--() {200 --__rep_;201 return *this;202 }203 _LIBCPP_HIDE_FROM_ABI duration operator--(int) { return duration(__rep_--); }204 205 _LIBCPP_HIDE_FROM_ABI duration& operator+=(const duration& __d) {206 __rep_ += __d.count();207 return *this;208 }209 _LIBCPP_HIDE_FROM_ABI duration& operator-=(const duration& __d) {210 __rep_ -= __d.count();211 return *this;212 }213 214 _LIBCPP_HIDE_FROM_ABI duration& operator*=(const rep& __rhs) {215 __rep_ *= __rhs;216 return *this;217 }218 _LIBCPP_HIDE_FROM_ABI duration& operator/=(const rep& __rhs) {219 __rep_ /= __rhs;220 return *this;221 }222 _LIBCPP_HIDE_FROM_ABI duration& operator%=(const rep& __rhs) {223 __rep_ %= __rhs;224 return *this;225 }226 _LIBCPP_HIDE_FROM_ABI duration& operator%=(const duration& __rhs) {227 __rep_ %= __rhs.count();228 return *this;229 }230 231 // special values232 233 _LIBCPP_HIDE_FROM_ABI static duration zero() _NOEXCEPT { return duration(duration_values<rep>::zero()); }234 _LIBCPP_HIDE_FROM_ABI static duration min() _NOEXCEPT { return duration(duration_values<rep>::min()); }235 _LIBCPP_HIDE_FROM_ABI static duration max() _NOEXCEPT { return duration(duration_values<rep>::max()); }236};237 238typedef duration<long long, nano> nanoseconds;239typedef duration<long long, micro> microseconds;240typedef duration<long long, milli> milliseconds;241typedef duration<long long > seconds;242typedef duration< long, ratio< 60> > minutes;243typedef duration< long, ratio<3600> > hours;244 245// Duration ==246 247template <class _LhsDuration, class _RhsDuration>248struct __duration_eq {249 _LIBCPP_HIDE_FROM_ABI bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {250 typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;251 return _Ct(__lhs).count() == _Ct(__rhs).count();252 }253};254 255template <class _LhsDuration>256struct __duration_eq<_LhsDuration, _LhsDuration> {257 _LIBCPP_HIDE_FROM_ABI bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {258 return __lhs.count() == __rhs.count();259 }260};261 262template <class _Rep1, class _Period1, class _Rep2, class _Period2>263inline _LIBCPP_HIDE_FROM_ABI bool264operator==(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {265 return __duration_eq<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);266}267 268// Duration !=269 270template <class _Rep1, class _Period1, class _Rep2, class _Period2>271inline _LIBCPP_HIDE_FROM_ABI bool272operator!=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {273 return !(__lhs == __rhs);274}275 276// Duration <277 278template <class _LhsDuration, class _RhsDuration>279struct __duration_lt {280 _LIBCPP_HIDE_FROM_ABI bool operator()(const _LhsDuration& __lhs, const _RhsDuration& __rhs) const {281 typedef typename common_type<_LhsDuration, _RhsDuration>::type _Ct;282 return _Ct(__lhs).count() < _Ct(__rhs).count();283 }284};285 286template <class _LhsDuration>287struct __duration_lt<_LhsDuration, _LhsDuration> {288 _LIBCPP_HIDE_FROM_ABI bool operator()(const _LhsDuration& __lhs, const _LhsDuration& __rhs) const {289 return __lhs.count() < __rhs.count();290 }291};292 293template <class _Rep1, class _Period1, class _Rep2, class _Period2>294inline _LIBCPP_HIDE_FROM_ABI bool295operator<(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {296 return __duration_lt<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >()(__lhs, __rhs);297}298 299// Duration >300 301template <class _Rep1, class _Period1, class _Rep2, class _Period2>302inline _LIBCPP_HIDE_FROM_ABI bool303operator>(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {304 return __rhs < __lhs;305}306 307// Duration <=308 309template <class _Rep1, class _Period1, class _Rep2, class _Period2>310inline _LIBCPP_HIDE_FROM_ABI bool311operator<=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {312 return !(__rhs < __lhs);313}314 315// Duration >=316 317template <class _Rep1, class _Period1, class _Rep2, class _Period2>318inline _LIBCPP_HIDE_FROM_ABI bool319operator>=(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {320 return !(__lhs < __rhs);321}322 323// Duration +324 325template <class _Rep1, class _Period1, class _Rep2, class _Period2>326inline _LIBCPP_HIDE_FROM_ABI typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type327operator+(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {328 typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;329 return _Cd(_Cd(__lhs).count() + _Cd(__rhs).count());330}331 332// Duration -333 334template <class _Rep1, class _Period1, class _Rep2, class _Period2>335inline _LIBCPP_HIDE_FROM_ABI typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type336operator-(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {337 typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;338 return _Cd(_Cd(__lhs).count() - _Cd(__rhs).count());339}340 341// Duration *342 343template <class _Rep1,344 class _Period,345 class _Rep2,346 __enable_if_t<is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>347inline _LIBCPP_HIDE_FROM_ABI duration<typename common_type<_Rep1, _Rep2>::type, _Period>348operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {349 typedef typename common_type<_Rep1, _Rep2>::type _Cr;350 typedef duration<_Cr, _Period> _Cd;351 return _Cd(_Cd(__d).count() * static_cast<_Cr>(__s));352}353 354template <class _Rep1,355 class _Period,356 class _Rep2,357 __enable_if_t<is_convertible<const _Rep1&, typename common_type<_Rep1, _Rep2>::type>::value, int> = 0>358inline _LIBCPP_HIDE_FROM_ABI duration<typename common_type<_Rep1, _Rep2>::type, _Period>359operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d) {360 return __d * __s;361}362 363// Duration /364 365template <class _Rep1,366 class _Period,367 class _Rep2,368 __enable_if_t<!__is_duration<_Rep2>::value &&369 is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,370 int> = 0>371inline _LIBCPP_HIDE_FROM_ABI duration<typename common_type<_Rep1, _Rep2>::type, _Period>372operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {373 typedef typename common_type<_Rep1, _Rep2>::type _Cr;374 typedef duration<_Cr, _Period> _Cd;375 return _Cd(_Cd(__d).count() / static_cast<_Cr>(__s));376}377 378template <class _Rep1, class _Period1, class _Rep2, class _Period2>379inline _LIBCPP_HIDE_FROM_ABI typename common_type<_Rep1, _Rep2>::type380operator/(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {381 typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Ct;382 return _Ct(__lhs).count() / _Ct(__rhs).count();383}384 385// Duration %386 387template <class _Rep1,388 class _Period,389 class _Rep2,390 __enable_if_t<!__is_duration<_Rep2>::value &&391 is_convertible<const _Rep2&, typename common_type<_Rep1, _Rep2>::type>::value,392 int> = 0>393inline _LIBCPP_HIDE_FROM_ABI duration<typename common_type<_Rep1, _Rep2>::type, _Period>394operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s) {395 typedef typename common_type<_Rep1, _Rep2>::type _Cr;396 typedef duration<_Cr, _Period> _Cd;397 return _Cd(_Cd(__d).count() % static_cast<_Cr>(__s));398}399 400template <class _Rep1, class _Period1, class _Rep2, class _Period2>401inline _LIBCPP_HIDE_FROM_ABI typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type402operator%(const duration<_Rep1, _Period1>& __lhs, const duration<_Rep2, _Period2>& __rhs) {403 typedef typename common_type<_Rep1, _Rep2>::type _Cr;404 typedef typename common_type<duration<_Rep1, _Period1>, duration<_Rep2, _Period2> >::type _Cd;405 return _Cd(static_cast<_Cr>(_Cd(__lhs).count()) % static_cast<_Cr>(_Cd(__rhs).count()));406}407 408} // namespace chrono409 410_LIBCPP_END_NAMESPACE_STD411 412_LIBCPP_POP_MACROS413 414#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)415# include <__cxx03/type_traits>416#endif417 418#endif // _LIBCPP___CXX03___CHRONO_DURATION_H419