concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType > Class Template Reference

#include <userver/concurrent/queue_helpers.hpp>

Detailed Description

template<typename QueueType, typename ConsumerToken, typename EmplaceEnablerType>
class concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >

Warning

A single Consumer must not be used from multiple threads concurrently

Definition at line 95 of file queue_helpers.hpp.

Public Member Functions
	Consumer (const Consumer &)=delete
	Consumer (Consumer &&) noexcept=default
Consumer &	operator= (const Consumer &)=delete
Consumer &	operator= (Consumer &&other) noexcept
bool	Pop (ValueType &value, engine::Deadline deadline={}) const
bool	PopNoblock (ValueType &value) const
void	Reset () &&
std::shared_ptr< const QueueType >	Queue () const
	Const access to source queue.

Constructor & Destructor Documentation

~Consumer()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::~Consumer ( )

inline

Definition at line 114 of file queue_helpers.hpp.

Member Function Documentation

operator=()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

Consumer & concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::operator= ( Consumer< QueueType, ConsumerToken, EmplaceEnablerType > && other )

inlinenoexcept

Definition at line 108 of file queue_helpers.hpp.

Pop()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

bool concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::Pop ( ValueType & value, engine::Deadline deadline = {} ) const

inline

Pop element from queue. May wait asynchronously if the queue is empty, but the producer is alive.

Returns

whether something was popped before the deadline.

Note

false can be returned before the deadline when the producer is no longer alive.

Warning

Be careful when using a method in a loop. The engine::Deadline is a wrapper over std::chrono::time_point, not duration! If you need a timeout, you must reconstruct the deadline in the loop.

Definition at line 127 of file queue_helpers.hpp.

PopNoblock()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

bool concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::PopNoblock ( ValueType & value ) const

inline

Try to pop element from queue without blocking. May be used in non-coroutine environment

Returns

whether something was popped.

Definition at line 136 of file queue_helpers.hpp.

Queue()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

std::shared_ptr< const QueueType > concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::Queue ( ) const

inline

Const access to source queue.

Definition at line 148 of file queue_helpers.hpp.

Reset()

template<typename QueueType , typename ConsumerToken , typename EmplaceEnablerType >

void concurrent::Consumer< QueueType, ConsumerToken, EmplaceEnablerType >::Reset ( ) &&

inline

Definition at line 141 of file queue_helpers.hpp.

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

• userver/concurrent/queue_helpers.hpp