std::experimental::flex_barrier

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Experimental

Technical Specification

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

Ranges (ranges TS)

Reflection (reflection TS)

Mathematical special functions (special functions TR)

Experimental Non-TS

Pattern Matching

Linear Algebra

std::execution

Contracts

2D Graphics

 

Extensions for concurrency

std::future extensions

experimental::future

experimental::shared_future

experimental::when_all

experimental::when_any

experimental::make_ready_future

experimental::make_exceptional_future

Latches and barriers

experimental::latch

experimental::barrier

experimental::flex_barrier

Atomic smart pointers

experimental::atomic_shared_ptr

experimental::atomic_weak_ptr

 

std::experimental::flex_barrier

flex_barrier::flex_barrier

flex_barrier::~flex_barrier

flex_barrier::arrive_and_wait

flex_barrier::arrive_and_drop

 

Defined in header <experimental/barrier>
class flex_barrier;		(concurrency TS)

The class std::experimental::flex_barrier provides a thread-coordination mechanism that allows a set of participating threads to block until an operation is completed. Unlike std::experimental::latch, barriers are reusable; once the participating threads are released from a barrier's synchronization point, they can reuse the same barrier.

A barrier has a completion phase, which is executed by one of the participating threads once all threads in the set of participating threads arrive at the synchronization point. The arrive_and_wait and arrive_and_drop calls synchronize with the start of the completion phase; the end of the completion phase synchronizes with the returns from all calls blocked by its completion.

std::experimental::flex_barrier allows the user to control the completion phase with a function object. If the function object returns -1, the set of participating threads is unchanged (and the same set of participating threads must arrive at the synchronization point in the next cycle); otherwise the set of participating threads becomes a new set with a size equal to the returned value N, and consists of the next N threads to arrive at the barrier's synchronization point.

Users who do not need this functionality can use std::experimental::barrier.

Member functions

(constructor)	constructs a flex_barrier (public member function)
(destructor)	destroys the flex_barrier (public member function)
operator= [deleted]	not copy-assignable (public member function)
arrive_and_wait	arrive at the synchronization point and block (public member function)
arrive_and_drop	arrive at the synchronization point and remove the current thread from the set of participating threads (public member function)

Follow Lee on X/Twitter - Father, Husband, Serial builder creating AI, crypto, games & web tools. We are friends :) AI Will Come To Life!

Check out: eBank.nz (Art Generator) | Netwrck.com (AI Tools) | Text-Generator.io (AI API) | BitBank.nz (Crypto AI) | ReadingTime (Kids Reading) | RewordGame | BigMultiplayerChess | WebFiddle | How.nz | Helix AI Assistant