forked from KolibriOS/kolibrios
sdk: build libsupc++ from libstdc++ source
git-svn-id: svn://kolibrios.org@5134 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
789
contrib/sdk/sources/libstdc++-v3/include/chrono
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789
contrib/sdk/sources/libstdc++-v3/include/chrono
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@@ -0,0 +1,789 @@
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// <chrono> -*- C++ -*-
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// Copyright (C) 2008-2013 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
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||||
|
||||
// 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
|
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// permissions described in the GCC Runtime Library Exception, version
|
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// 3.1, as published by the Free Software Foundation.
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||||
|
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// 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;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file include/chrono
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* This is a Standard C++ Library header.
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*/
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#ifndef _GLIBCXX_CHRONO
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#define _GLIBCXX_CHRONO 1
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#pragma GCC system_header
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#if __cplusplus < 201103L
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# include <bits/c++0x_warning.h>
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#else
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#include <ratio>
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#include <type_traits>
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#include <limits>
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#include <ctime>
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#ifdef _GLIBCXX_USE_C99_STDINT_TR1
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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/**
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* @defgroup chrono Time
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* @ingroup utilities
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*
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* Classes and functions for time.
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* @{
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*/
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/** @namespace std::chrono
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* @brief ISO C++ 2011 entities sub-namespace for time and date.
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*/
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namespace chrono
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _Rep, typename _Period = ratio<1>>
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struct duration;
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template<typename _Clock, typename _Dur = typename _Clock::duration>
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struct time_point;
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|
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_GLIBCXX_END_NAMESPACE_VERSION
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}
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|
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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|
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// 20.11.4.3 specialization of common_type (for duration, sfinae-friendly)
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|
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template<typename _CT, typename _Period1, typename _Period2>
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struct __duration_common_type_wrapper
|
||||
{
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||||
private:
|
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typedef __static_gcd<_Period1::num, _Period2::num> __gcd_num;
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typedef __static_gcd<_Period1::den, _Period2::den> __gcd_den;
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typedef typename _CT::type __cr;
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typedef ratio<__gcd_num::value,
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(_Period1::den / __gcd_den::value) * _Period2::den> __r;
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public:
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typedef __success_type<chrono::duration<__cr, __r>> type;
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};
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template<typename _Period1, typename _Period2>
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struct __duration_common_type_wrapper<__failure_type, _Period1, _Period2>
|
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{ typedef __failure_type type; };
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template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
|
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struct common_type<chrono::duration<_Rep1, _Period1>,
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chrono::duration<_Rep2, _Period2>>
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: public __duration_common_type_wrapper<typename __member_type_wrapper<
|
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common_type<_Rep1, _Rep2>>::type, _Period1, _Period2>::type
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{ };
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// 20.11.4.3 specialization of common_type (for time_point, sfinae-friendly)
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template<typename _CT, typename _Clock>
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struct __timepoint_common_type_wrapper
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||||
{
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typedef __success_type<chrono::time_point<_Clock, typename _CT::type>>
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type;
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};
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template<typename _Clock>
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struct __timepoint_common_type_wrapper<__failure_type, _Clock>
|
||||
{ typedef __failure_type type; };
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template<typename _Clock, typename _Duration1, typename _Duration2>
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struct common_type<chrono::time_point<_Clock, _Duration1>,
|
||||
chrono::time_point<_Clock, _Duration2>>
|
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: public __timepoint_common_type_wrapper<typename __member_type_wrapper<
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common_type<_Duration1, _Duration2>>::type, _Clock>::type
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{ };
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_GLIBCXX_END_NAMESPACE_VERSION
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namespace chrono
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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|
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// Primary template for duration_cast impl.
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template<typename _ToDur, typename _CF, typename _CR,
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bool _NumIsOne = false, bool _DenIsOne = false>
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struct __duration_cast_impl
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||||
{
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||||
template<typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const duration<_Rep, _Period>& __d)
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||||
{
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typedef typename _ToDur::rep __to_rep;
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||||
return _ToDur(static_cast<__to_rep>(static_cast<_CR>(__d.count())
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* static_cast<_CR>(_CF::num)
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||||
/ static_cast<_CR>(_CF::den)));
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||||
}
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||||
};
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|
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template<typename _ToDur, typename _CF, typename _CR>
|
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struct __duration_cast_impl<_ToDur, _CF, _CR, true, true>
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||||
{
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||||
template<typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const duration<_Rep, _Period>& __d)
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||||
{
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typedef typename _ToDur::rep __to_rep;
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return _ToDur(static_cast<__to_rep>(__d.count()));
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||||
}
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||||
};
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|
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template<typename _ToDur, typename _CF, typename _CR>
|
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struct __duration_cast_impl<_ToDur, _CF, _CR, true, false>
|
||||
{
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template<typename _Rep, typename _Period>
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static constexpr _ToDur
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||||
__cast(const duration<_Rep, _Period>& __d)
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||||
{
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||||
typedef typename _ToDur::rep __to_rep;
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||||
return _ToDur(static_cast<__to_rep>(
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static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den)));
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||||
}
|
||||
};
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||||
|
||||
template<typename _ToDur, typename _CF, typename _CR>
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||||
struct __duration_cast_impl<_ToDur, _CF, _CR, false, true>
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||||
{
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||||
template<typename _Rep, typename _Period>
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||||
static constexpr _ToDur
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||||
__cast(const duration<_Rep, _Period>& __d)
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||||
{
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||||
typedef typename _ToDur::rep __to_rep;
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||||
return _ToDur(static_cast<__to_rep>(
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static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num)));
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||||
}
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||||
};
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||||
|
||||
template<typename _Tp>
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||||
struct __is_duration
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||||
: std::false_type
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||||
{ };
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||||
|
||||
template<typename _Rep, typename _Period>
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||||
struct __is_duration<duration<_Rep, _Period>>
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||||
: std::true_type
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||||
{ };
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||||
|
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/// duration_cast
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template<typename _ToDur, typename _Rep, typename _Period>
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||||
constexpr typename enable_if<__is_duration<_ToDur>::value,
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||||
_ToDur>::type
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duration_cast(const duration<_Rep, _Period>& __d)
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||||
{
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typedef typename _ToDur::period __to_period;
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typedef typename _ToDur::rep __to_rep;
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||||
typedef ratio_divide<_Period, __to_period> __cf;
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typedef typename common_type<__to_rep, _Rep, intmax_t>::type
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||||
__cr;
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typedef __duration_cast_impl<_ToDur, __cf, __cr,
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__cf::num == 1, __cf::den == 1> __dc;
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return __dc::__cast(__d);
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||||
}
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||||
|
||||
/// treat_as_floating_point
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template<typename _Rep>
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||||
struct treat_as_floating_point
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: is_floating_point<_Rep>
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||||
{ };
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||||
|
||||
/// duration_values
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||||
template<typename _Rep>
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||||
struct duration_values
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||||
{
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||||
static constexpr _Rep
|
||||
zero()
|
||||
{ return _Rep(0); }
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||||
|
||||
static constexpr _Rep
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||||
max()
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||||
{ return numeric_limits<_Rep>::max(); }
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||||
|
||||
static constexpr _Rep
|
||||
min()
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||||
{ return numeric_limits<_Rep>::lowest(); }
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};
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|
||||
template<typename _Tp>
|
||||
struct __is_ratio
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||||
: std::false_type
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||||
{ };
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||||
|
||||
template<intmax_t _Num, intmax_t _Den>
|
||||
struct __is_ratio<ratio<_Num, _Den>>
|
||||
: std::true_type
|
||||
{ };
|
||||
|
||||
/// duration
|
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template<typename _Rep, typename _Period>
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||||
struct duration
|
||||
{
|
||||
typedef _Rep rep;
|
||||
typedef _Period period;
|
||||
|
||||
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");
|
||||
|
||||
// 20.11.5.1 construction / copy / destroy
|
||||
constexpr duration() = default;
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||||
|
||||
// NB: Make constexpr implicit. This cannot be explicitly
|
||||
// constexpr, as any UDT that is not a literal type with a
|
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// constexpr copy constructor will be ill-formed.
|
||||
duration(const 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>
|
||||
constexpr explicit duration(const _Rep2& __rep)
|
||||
: __r(static_cast<rep>(__rep)) { }
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||||
|
||||
template<typename _Rep2, typename _Period2, typename = typename
|
||||
enable_if<treat_as_floating_point<rep>::value
|
||||
|| (ratio_divide<_Period2, period>::den == 1
|
||||
&& !treat_as_floating_point<_Rep2>::value)>::type>
|
||||
constexpr duration(const duration<_Rep2, _Period2>& __d)
|
||||
: __r(duration_cast<duration>(__d).count()) { }
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~duration() = default;
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||||
duration& operator=(const duration&) = default;
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|
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// 20.11.5.2 observer
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constexpr rep
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||||
count() const
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||||
{ return __r; }
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||||
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// 20.11.5.3 arithmetic
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constexpr duration
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||||
operator+() const
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||||
{ return *this; }
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||||
|
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constexpr duration
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||||
operator-() const
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||||
{ return duration(-__r); }
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||||
|
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duration&
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||||
operator++()
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||||
{
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||||
++__r;
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||||
return *this;
|
||||
}
|
||||
|
||||
duration
|
||||
operator++(int)
|
||||
{ return duration(__r++); }
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||||
|
||||
duration&
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operator--()
|
||||
{
|
||||
--__r;
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||||
return *this;
|
||||
}
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||||
|
||||
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;
|
||||
}
|
||||
|
||||
// 20.11.5.4 special values
|
||||
static constexpr duration
|
||||
zero()
|
||||
{ return duration(duration_values<rep>::zero()); }
|
||||
|
||||
static constexpr duration
|
||||
min()
|
||||
{ return duration(duration_values<rep>::min()); }
|
||||
|
||||
static constexpr duration
|
||||
max()
|
||||
{ return duration(duration_values<rep>::max()); }
|
||||
|
||||
private:
|
||||
rep __r;
|
||||
};
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr typename common_type<duration<_Rep1, _Period1>,
|
||||
duration<_Rep2, _Period2>>::type
|
||||
operator+(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __cd;
|
||||
return __cd(__cd(__lhs).count() + __cd(__rhs).count());
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr typename common_type<duration<_Rep1, _Period1>,
|
||||
duration<_Rep2, _Period2>>::type
|
||||
operator-(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __cd;
|
||||
return __cd(__cd(__lhs).count() - __cd(__rhs).count());
|
||||
}
|
||||
|
||||
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>
|
||||
constexpr
|
||||
duration<typename __common_rep_type<_Rep1, _Rep2>::type, _Period>
|
||||
operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
|
||||
{
|
||||
typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
|
||||
__cd;
|
||||
return __cd(__cd(__d).count() * __s);
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Rep2, typename _Period>
|
||||
constexpr
|
||||
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>
|
||||
constexpr 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 duration<typename common_type<_Rep1, _Rep2>::type, _Period>
|
||||
__cd;
|
||||
return __cd(__cd(__d).count() / __s);
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr typename common_type<_Rep1, _Rep2>::type
|
||||
operator/(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __cd;
|
||||
return __cd(__lhs).count() / __cd(__rhs).count();
|
||||
}
|
||||
|
||||
// DR 934.
|
||||
template<typename _Rep1, typename _Period, typename _Rep2>
|
||||
constexpr 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 duration<typename common_type<_Rep1, _Rep2>::type, _Period>
|
||||
__cd;
|
||||
return __cd(__cd(__d).count() % __s);
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr typename common_type<duration<_Rep1, _Period1>,
|
||||
duration<_Rep2, _Period2>>::type
|
||||
operator%(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __cd;
|
||||
return __cd(__cd(__lhs).count() % __cd(__rhs).count());
|
||||
}
|
||||
|
||||
// comparisons
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr bool
|
||||
operator==(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __ct;
|
||||
return __ct(__lhs).count() == __ct(__rhs).count();
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr bool
|
||||
operator<(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<__dur1,__dur2>::type __ct;
|
||||
return __ct(__lhs).count() < __ct(__rhs).count();
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr bool
|
||||
operator!=(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{ return !(__lhs == __rhs); }
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr bool
|
||||
operator<=(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{ return !(__rhs < __lhs); }
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr bool
|
||||
operator>(const duration<_Rep1, _Period1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{ return __rhs < __lhs; }
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr 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 _Dur>
|
||||
struct time_point
|
||||
{
|
||||
typedef _Clock clock;
|
||||
typedef _Dur duration;
|
||||
typedef typename duration::rep rep;
|
||||
typedef typename duration::period period;
|
||||
|
||||
constexpr time_point() : __d(duration::zero())
|
||||
{ }
|
||||
|
||||
constexpr explicit time_point(const duration& __dur)
|
||||
: __d(__dur)
|
||||
{ }
|
||||
|
||||
// conversions
|
||||
template<typename _Dur2>
|
||||
constexpr time_point(const time_point<clock, _Dur2>& __t)
|
||||
: __d(__t.time_since_epoch())
|
||||
{ }
|
||||
|
||||
// observer
|
||||
constexpr 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
|
||||
static constexpr time_point
|
||||
min()
|
||||
{ return time_point(duration::min()); }
|
||||
|
||||
static constexpr time_point
|
||||
max()
|
||||
{ return time_point(duration::max()); }
|
||||
|
||||
private:
|
||||
duration __d;
|
||||
};
|
||||
|
||||
/// time_point_cast
|
||||
template<typename _ToDur, typename _Clock, typename _Dur>
|
||||
constexpr typename enable_if<__is_duration<_ToDur>::value,
|
||||
time_point<_Clock, _ToDur>>::type
|
||||
time_point_cast(const time_point<_Clock, _Dur>& __t)
|
||||
{
|
||||
typedef time_point<_Clock, _ToDur> __time_point;
|
||||
return __time_point(duration_cast<_ToDur>(__t.time_since_epoch()));
|
||||
}
|
||||
|
||||
template<typename _Clock, typename _Dur1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr time_point<_Clock,
|
||||
typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
|
||||
operator+(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<_Dur1,__dur2>::type __ct;
|
||||
typedef time_point<_Clock, __ct> __time_point;
|
||||
return __time_point(__lhs.time_since_epoch() + __rhs);
|
||||
}
|
||||
|
||||
template<typename _Rep1, typename _Period1,
|
||||
typename _Clock, typename _Dur2>
|
||||
constexpr time_point<_Clock,
|
||||
typename common_type<duration<_Rep1, _Period1>, _Dur2>::type>
|
||||
operator+(const duration<_Rep1, _Period1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep1, _Period1> __dur1;
|
||||
typedef typename common_type<__dur1,_Dur2>::type __ct;
|
||||
typedef time_point<_Clock, __ct> __time_point;
|
||||
return __time_point(__rhs.time_since_epoch() + __lhs);
|
||||
}
|
||||
|
||||
template<typename _Clock, typename _Dur1,
|
||||
typename _Rep2, typename _Period2>
|
||||
constexpr time_point<_Clock,
|
||||
typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
|
||||
operator-(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const duration<_Rep2, _Period2>& __rhs)
|
||||
{
|
||||
typedef duration<_Rep2, _Period2> __dur2;
|
||||
typedef typename common_type<_Dur1,__dur2>::type __ct;
|
||||
typedef time_point<_Clock, __ct> __time_point;
|
||||
return __time_point(__lhs.time_since_epoch() -__rhs);
|
||||
}
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr typename common_type<_Dur1, _Dur2>::type
|
||||
operator-(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return __lhs.time_since_epoch() - __rhs.time_since_epoch(); }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator==(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return __lhs.time_since_epoch() == __rhs.time_since_epoch(); }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator!=(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return !(__lhs == __rhs); }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator<(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return __lhs.time_since_epoch() < __rhs.time_since_epoch(); }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator<=(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return !(__rhs < __lhs); }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator>(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return __rhs < __lhs; }
|
||||
|
||||
template<typename _Clock, typename _Dur1, typename _Dur2>
|
||||
constexpr bool
|
||||
operator>=(const time_point<_Clock, _Dur1>& __lhs,
|
||||
const time_point<_Clock, _Dur2>& __rhs)
|
||||
{ return !(__lhs < __rhs); }
|
||||
|
||||
|
||||
// Clocks.
|
||||
|
||||
// Why nanosecond resolution as the default?
|
||||
// Why have std::system_clock always count in the higest
|
||||
// resolution (ie nanoseconds), even if on some OSes the low 3
|
||||
// or 9 decimal digits will be always zero? This allows later
|
||||
// implementations to change the system_clock::now()
|
||||
// implementation any time to provide better resolution without
|
||||
// changing function signature or units.
|
||||
|
||||
// To support the (forward) evolution of the library's defined
|
||||
// clocks, wrap inside inline namespace so that the current
|
||||
// defintions of system_clock, steady_clock, and
|
||||
// high_resolution_clock types are uniquely mangled. This way, new
|
||||
// code can use the latests clocks, while the library can contain
|
||||
// compatibility definitions for previous versions. At some
|
||||
// point, when these clocks settle down, the inlined namespaces
|
||||
// can be removed. XXX GLIBCXX_ABI Deprecated
|
||||
inline namespace _V2 {
|
||||
|
||||
/**
|
||||
* @brief System clock.
|
||||
*
|
||||
* Time returned represents wall time from the system-wide clock.
|
||||
*/
|
||||
struct system_clock
|
||||
{
|
||||
typedef chrono::nanoseconds duration;
|
||||
typedef duration::rep rep;
|
||||
typedef duration::period period;
|
||||
typedef chrono::time_point<system_clock, duration> time_point;
|
||||
|
||||
static_assert(system_clock::duration::min()
|
||||
< system_clock::duration::zero(),
|
||||
"a clock's minimum duration cannot be less than its epoch");
|
||||
|
||||
static constexpr bool is_steady = false;
|
||||
|
||||
static time_point
|
||||
now() noexcept;
|
||||
|
||||
// Map to C API
|
||||
static std::time_t
|
||||
to_time_t(const time_point& __t) noexcept
|
||||
{
|
||||
return std::time_t(duration_cast<chrono::seconds>
|
||||
(__t.time_since_epoch()).count());
|
||||
}
|
||||
|
||||
static time_point
|
||||
from_time_t(std::time_t __t) noexcept
|
||||
{
|
||||
typedef chrono::time_point<system_clock, seconds> __from;
|
||||
return time_point_cast<system_clock::duration>
|
||||
(__from(chrono::seconds(__t)));
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @brief Monotonic clock
|
||||
*
|
||||
* Time returned has the property of only increasing at a uniform rate.
|
||||
*/
|
||||
struct steady_clock
|
||||
{
|
||||
typedef chrono::nanoseconds duration;
|
||||
typedef duration::rep rep;
|
||||
typedef duration::period period;
|
||||
typedef chrono::time_point<steady_clock, duration> time_point;
|
||||
|
||||
static constexpr bool is_steady = true;
|
||||
|
||||
static time_point
|
||||
now() noexcept;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @brief Highest-resolution clock
|
||||
*
|
||||
* This is the clock "with the shortest tick period." Alias to
|
||||
* std::system_clock until higher-than-nanosecond definitions
|
||||
* become feasible.
|
||||
*/
|
||||
using high_resolution_clock = system_clock;
|
||||
|
||||
} // end inline namespace _V2
|
||||
|
||||
_GLIBCXX_END_NAMESPACE_VERSION
|
||||
} // namespace chrono
|
||||
|
||||
// @} group chrono
|
||||
} // namespace
|
||||
|
||||
#endif //_GLIBCXX_USE_C99_STDINT_TR1
|
||||
|
||||
#endif // C++11
|
||||
|
||||
#endif //_GLIBCXX_CHRONO
|
||||
Reference in New Issue
Block a user