oscr::latest_value< T > Struct Template Reference

Inheritance diagram for oscr::latest_value< T >:

Detailed Description

template<typename T>
struct oscr::latest_value< T >

The latest of a series of values, from one writing thread to one reading thread, without allocation or lock: a triple buffer. Values the reader has not taken yet are replaced by newer ones.

The writer fills back() then publish()es it; the reader take()s the latest published value. Slots are built on the thread that builds the mailbox: give a string slot its capacity there, and write at most that much.

Public Member Functions
template<typename F >
void	for_each_slot (F &&f)
T &	back () noexcept
void	publish () noexcept
T *	take () noexcept
Public Member Functions inherited from oscr::drain_request
bool	request () noexcept
void	cancel () noexcept
void	clear () noexcept
void	park () noexcept
	Writer's thread: the wake-up could not be sent.
bool	unpark () noexcept
	Writer's thread: whether a wake-up was parked since the last call.

Member Function Documentation

take()

template<typename T >

T * oscr::latest_value< T >::take ( )

inlinenoexcept

The latest published value, or nullptr when none was published since the last call. It stays valid until the next call.

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

• MessageBus.hpp