673 lines
21 KiB
C++
673 lines
21 KiB
C++
// <chrono> -*- C++ -*-
|
|
|
|
// Copyright (C) 2008, 2009 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 <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)));
|
|
}
|
|
};
|
|
|
|
/// duration_cast
|
|
template<typename _ToDuration, typename _Rep, typename _Period>
|
|
inline _ToDuration
|
|
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 _Tp>
|
|
struct __is_duration
|
|
: std::false_type
|
|
{ };
|
|
|
|
template<typename _Rep, typename _Period>
|
|
struct __is_duration<duration<_Rep, _Period>>
|
|
: std::true_type
|
|
{ };
|
|
|
|
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>
|
|
explicit duration(_Rep2 const& __rep)
|
|
: __r(static_cast<rep>(__rep))
|
|
{
|
|
static_assert(is_convertible<_Rep2,rep>::value
|
|
&& (treat_as_floating_point<rep>::value
|
|
|| !treat_as_floating_point<_Rep2>::value),
|
|
"cannot construct integral duration with floating point type");
|
|
}
|
|
|
|
template<typename _Rep2, typename _Period2>
|
|
duration(const duration<_Rep2, _Period2>& __d)
|
|
: __r(duration_cast<duration>(__d).count())
|
|
{
|
|
static_assert(treat_as_floating_point<rep>::value == true
|
|
|| ratio_divide<_Period2, period>::type::den == 1,
|
|
"the resulting duration is not exactly representable");
|
|
}
|
|
|
|
~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;
|
|
}
|
|
|
|
// 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 _Period, typename _Rep2>
|
|
inline duration<typename common_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_type<_Rep1, _Rep2>::type, _Period>
|
|
operator*(const _Rep2& __s, const duration<_Rep1, _Period>& __d)
|
|
{ return __d * __s; }
|
|
|
|
template<typename _Tp, typename _Up, typename _Ep = void>
|
|
struct __division_impl;
|
|
|
|
template<typename _Rep1, typename _Period, typename _Rep2>
|
|
struct __division_impl<duration<_Rep1, _Period>, _Rep2,
|
|
typename enable_if<!__is_duration<_Rep2>::value>::type>
|
|
{
|
|
typedef typename common_type<_Rep1, _Rep2>::type __cr;
|
|
typedef
|
|
duration<typename common_type<_Rep1, _Rep2>::type, _Period> __rt;
|
|
|
|
static __rt
|
|
__divide(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
|
|
{ return duration<__cr, _Period>(__d) /= __s; }
|
|
};
|
|
|
|
template<typename _Rep1, typename _Period1,
|
|
typename _Rep2, typename _Period2>
|
|
struct __division_impl<duration<_Rep1, _Period1>,
|
|
duration<_Rep2, _Period2>>
|
|
{
|
|
typedef typename common_type<duration<_Rep1, _Period1>,
|
|
duration<_Rep2, _Period2>>::type __ct;
|
|
typedef typename common_type<_Rep1, _Rep2>::type __rt;
|
|
|
|
static __rt
|
|
__divide(const duration<_Rep1, _Period1>& __lhs,
|
|
const duration<_Rep2, _Period2>& __rhs)
|
|
{ return __ct(__lhs).count() / __ct(__rhs).count(); }
|
|
};
|
|
|
|
template<typename _Rep, typename _Period, typename _Up>
|
|
inline typename __division_impl<duration<_Rep, _Period>, _Up>::__rt
|
|
operator/(const duration<_Rep, _Period>& __d, const _Up& __u)
|
|
{
|
|
return
|
|
__division_impl<duration<_Rep, _Period>, _Up>::__divide(__d, __u);
|
|
}
|
|
|
|
// 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 time_point<_Clock, _ToDuration>
|
|
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
|