# std::chrono Namespace Reference
[Time]

ISO C++ 0x entities sub namespace for time and date. More...

## Classes

- struct duration
    duration More...
- struct duration_values
    duration_values More...
- struct system_clock
    system_clock More...
- struct time_point
    time_point More...
- struct treat_as_floating_point
    treat_as_floating_point More...

## Typedefs

- typedef system_clock high_resolution_clock
- typedef duration< int, ratio< 3600 > > hours
- typedef duration< int64_t, micro > microseconds
- typedef duration< int64_t, milli > milliseconds
- typedef duration< int, ratio< 60 > > minutes
- typedef system_clock monotonic_clock
- typedef duration< int64_t, nano > nanoseconds
- typedef duration< int64_t > seconds

## Functions

- template<typename _ToDuration , typename _Rep , typename _Period > enable_if< __is_duration
  < _ToDuration >::value,
  _ToDuration >::type duration_cast (const duration< _Rep, _Period > &__d)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator!= (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator!= (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > common_type< duration< _Rep1,
  _Period1 >, duration< _Rep2,
  _Period2 > >::type operator% (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Rep1 , typename _Period , typename _Rep2 > 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)
- template<typename _Rep1 , typename _Period , typename _Rep2 > duration< typename
  __common_rep_type< _Rep1,
  _Rep2 >::type, _Period > operator* (const duration< _Rep1, _Period > &__d, const _Rep2 &__s)
- template<typename _Rep1 , typename _Period , typename _Rep2 > duration< typename
  __common_rep_type< _Rep2,
  _Rep1 >::type, _Period > operator* (const _Rep1 &__s, const duration< _Rep2, _Period > &__d)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > common_type< duration< _Rep1,
  _Period1 >, duration< _Rep2,
  _Period2 > >::type operator+ (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Rep2 , typename _Period2 > time_point< _Clock, typename
  common_type< _Duration1,
  duration< _Rep2, _Period2 >
  >::type > operator+ (const time_point< _Clock, _Duration1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Clock , typename _Duration2 > time_point< _Clock, typename
  common_type< duration< _Rep1,
  _Period1 >, _Duration2 >::type > operator+ (const duration< _Rep1, _Period1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Rep2 , typename _Period2 > time_point< _Clock, typename
  common_type< _Duration1,
  duration< _Rep2, _Period2 >
  >::type > operator- (const time_point< _Clock, _Duration1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > common_type< _Duration1,
  _Duration2 >::type operator- (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > common_type< duration< _Rep1,
  _Period1 >, duration< _Rep2,
  _Period2 > >::type operator- (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Rep1 , typename _Period , typename _Rep2 > 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)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > common_type< _Rep1, _Rep2 >::type operator/ (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator< (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator< (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator<= (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator<= (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator== (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator== (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator> (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator> (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _Clock , typename _Duration1 , typename _Duration2 > bool operator>= (const time_point< _Clock, _Duration1 > &__lhs, const time_point< _Clock, _Duration2 > &__rhs)
- template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > bool operator>= (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
- template<typename _ToDuration , typename _Clock , typename _Duration > enable_if< __is_duration
  < _ToDuration >::value,
  time_point< _Clock,
  _ToDuration > >::type time_point_cast (const time_point< _Clock, _Duration > &__t)

## Detailed Description

ISO C++ 0x entities sub namespace for time and date.

## Typedef Documentation

typedef duration<int, ratio<3600> > std::chrono::hours

hours

Definition at line 488 of file chrono.

typedef duration<int64_t, micro> std::chrono::microseconds

microseconds

Definition at line 476 of file chrono.

typedef duration<int64_t, milli> std::chrono::milliseconds

milliseconds

Definition at line 479 of file chrono.

typedef duration<int, ratio< 60> > std::chrono::minutes

minutes

Definition at line 485 of file chrono.

typedef duration<int64_t, nano> std::chrono::nanoseconds

nanoseconds

Definition at line 473 of file chrono.

typedef duration<int64_t > std::chrono::seconds

seconds

Definition at line 482 of file chrono.

## Function Documentation

template<typename _ToDuration , typename _Rep , typename _Period >

enable_if<__is_duration<_ToDuration>::value, _ToDuration>::type std::chrono::duration_cast | ( | const duration< _Rep, _Period > & | __d | ) | `[inline]`

duration_cast

Definition at line 155 of file chrono.

Referenced by std::this_thread::sleep_for(), and time_point_cast().

template<typename _ToDuration , typename _Clock , typename _Duration >

enable_if<__is_duration<_ToDuration>::value, time_point<_Clock, _ToDuration> >::type std::chrono::time_point_cast | ( | const time_point< _Clock, _Duration > & | __t | ) | `[inline]`

time_point_cast

Definition at line 550 of file chrono.

References duration_cast().