beast::abstract_clock< Clock > Class Template Reference

Abstract interface to a clock. More...

Inheritance diagram for beast::abstract_clock< Clock >:

Public Types
using	rep = typename Clock::rep
using	period = typename Clock::period
using	duration = typename Clock::duration
using	time_point = typename Clock::time_point
using	clock_type = Clock

Public Member Functions
virtual	~abstract_clock ()=default
	abstract_clock ()=default
	abstract_clock (abstract_clock const &)=default
virtual time_point	now () const =0
	Returns the current time. More...

Static Public Attributes
static const bool	is_steady = Clock::is_steady

Detailed Description

template<class Clock>
class beast::abstract_clock< Clock >

Abstract interface to a clock.

This makes now() a member function instead of a static member, so an instance of the class can be dependency injected, facilitating unit tests where time may be controlled.

An abstract_clock inherits all the nested types of the Clock template parameter.

Example:

struct Implementation
{
    using clock_type = abstract_clock <std::chrono::steady_clock>;
    clock_type& clock_;
    explicit Implementation (clock_type& clock)
        : clock_(clock)
    {
    }
};

Template Parameters

Clock

A type meeting these requirements: http://en.cppreference.com/w/cpp/concept/Clock

Definition at line 57 of file abstract_clock.h.

Member Typedef Documentation

rep

template<class Clock >

using beast::abstract_clock< Clock >::rep = typename Clock::rep

Definition at line 60 of file abstract_clock.h.

period

template<class Clock >

using beast::abstract_clock< Clock >::period = typename Clock::period

Definition at line 61 of file abstract_clock.h.

duration

template<class Clock >

using beast::abstract_clock< Clock >::duration = typename Clock::duration

Definition at line 62 of file abstract_clock.h.

time_point

template<class Clock >

using beast::abstract_clock< Clock >::time_point = typename Clock::time_point

Definition at line 63 of file abstract_clock.h.

clock_type

template<class Clock >

using beast::abstract_clock< Clock >::clock_type = Clock

Definition at line 64 of file abstract_clock.h.

Constructor & Destructor Documentation

~abstract_clock()

template<class Clock >

virtual beast::abstract_clock< Clock >::~abstract_clock ( )

virtualdefault

abstract_clock() [1/2]

template<class Clock >

beast::abstract_clock< Clock >::abstract_clock ( )

default

abstract_clock() [2/2]

template<class Clock >

beast::abstract_clock< Clock >::abstract_clock ( abstract_clock< Clock > const &  )

default

Member Function Documentation

now()

template<class Clock >

virtual time_point beast::abstract_clock< Clock >::now ( ) const

pure virtual

Returns the current time.

Implemented in beast::manual_clock< Clock >, and beast::manual_clock< std::chrono::steady_clock >.

Member Data Documentation

is_steady

template<class Clock >

const bool beast::abstract_clock< Clock >::is_steady = Clock::is_steady

static

Definition at line 66 of file abstract_clock.h.