engine::Deadline Class Reference

#include <userver/engine/deadline.hpp>

Detailed Description

Internal representation of a deadline time point.

Definition at line 14 of file deadline.hpp.

Public Types
using	Clock = std::chrono::steady_clock
using	TimePoint = Clock::time_point
using	Duration = TimePoint::duration

Public Member Functions
constexpr	Deadline ()=default
	Creates an unreachable deadline.
constexpr bool	IsReachable () const noexcept
	Returns whether the deadline can be reached.
bool	IsReached () const noexcept
	Returns whether the deadline is reached.
bool	IsSurelyReachedApprox () const noexcept
Duration	TimeLeft () const noexcept
	Returns the duration of time left before the reachable deadline.
Duration	TimeLeftApprox () const noexcept
constexpr TimePoint	GetTimePoint () const noexcept
constexpr bool	operator== (const Deadline &r) const noexcept
constexpr bool	operator< (const Deadline &r) const noexcept

Static Public Member Functions
template<typename Rep , typename Period >
static Deadline	FromDuration (const std::chrono::duration< Rep, Period > &duration) noexcept
	Converts duration to a Deadline.
static Deadline	FromDuration (const Duration &duration) noexcept
template<typename Clock , typename Duration >
static Deadline	FromTimePoint (const std::chrono::time_point< Clock, Duration > &time_point) noexcept
	Converts time point to a Deadline.
static constexpr Deadline	Passed () noexcept
	A Deadline that is guaranteed to be IsReached.
template<typename Rep , typename Period >
static Duration	ToDurationSaturating (const std::chrono::duration< Rep, Period > &from) noexcept
	Converts 'std::chrono::duration<>' to 'Deadline::Duration'.

Member Typedef Documentation

Clock

using engine::Deadline::Clock = std::chrono::steady_clock

Definition at line 16 of file deadline.hpp.

Duration

using engine::Deadline::Duration = TimePoint::duration

Definition at line 18 of file deadline.hpp.

TimePoint

using engine::Deadline::TimePoint = Clock::time_point

Definition at line 17 of file deadline.hpp.

Member Function Documentation

FromDuration() [1/2]

static Deadline engine::Deadline::FromDuration ( const Duration &  duration )

inlinestaticnoexcept

Definition at line 52 of file deadline.hpp.

FromDuration() [2/2]

template<typename Rep , typename Period >

static Deadline engine::Deadline::FromDuration ( const std::chrono::duration< Rep, Period > &  duration )

inlinestaticnoexcept

Converts duration to a Deadline.

Definition at line 48 of file deadline.hpp.

FromTimePoint()

template<typename Clock , typename Duration >

static Deadline engine::Deadline::FromTimePoint ( const std::chrono::time_point< Clock, Duration > &  time_point )

inlinestaticnoexcept

Converts time point to a Deadline.

Non-steady clocks may produce inaccurate Deadlines. Prefer using Deadline::FromDuration or std::chrono::steady_clock::time_point if possible.

Definition at line 65 of file deadline.hpp.

GetTimePoint()

constexpr TimePoint engine::Deadline::GetTimePoint ( ) const

inlineconstexprnoexcept

Returns the native time point value. Returns TimePoint::max() for unreachable deadline and TimePoint::min() for Deadline::Passed()

Definition at line 44 of file deadline.hpp.

IsReachable()

constexpr bool engine::Deadline::IsReachable ( ) const

inlineconstexprnoexcept

Returns whether the deadline can be reached.

Definition at line 24 of file deadline.hpp.

IsSurelyReachedApprox()

bool engine::Deadline::IsSurelyReachedApprox ( ) const

noexcept

Returns whether the deadline is reached. Will report false-negatives, will never report false-positives.

operator<()

constexpr bool engine::Deadline::operator< ( const Deadline &  r ) const

inlineconstexprnoexcept

Definition at line 79 of file deadline.hpp.

operator==()

constexpr bool engine::Deadline::operator== ( const Deadline &  r ) const

inlineconstexprnoexcept

Definition at line 77 of file deadline.hpp.

Passed()

static constexpr Deadline engine::Deadline::Passed ( )

inlinestaticconstexprnoexcept

A Deadline that is guaranteed to be IsReached.

Definition at line 75 of file deadline.hpp.

TimeLeftApprox()

Duration engine::Deadline::TimeLeftApprox ( ) const

noexcept

Returns the approximate duration of time left before the reachable deadline. May be faster than TimeLeft.

See also

utils::datetime::SteadyCoarseClock

ToDurationSaturating()

template<typename Rep , typename Period >

static Duration engine::Deadline::ToDurationSaturating ( const std::chrono::duration< Rep, Period > &  from )

inlinestaticnoexcept

Converts 'std::chrono::duration<>' to 'Deadline::Duration'.

Definition at line 87 of file deadline.hpp.

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The documentation for this class was generated from the following file:

• userver/engine/deadline.hpp