Struct std::sync::Barrier

pub struct Barrier {
    // some fields omitted
}

A barrier enables multiple threads to synchronize the beginning of some computation.

fn main() { use std::sync::{Arc, Barrier}; use std::thread; let mut handles = Vec::with_capacity(10); let barrier = Arc::new(Barrier::new(10)); for _ in 0..10 { let c = barrier.clone(); // The same messages will be printed together. // You will NOT see any interleaving. handles.push(thread::spawn(move|| { println!("before wait"); c.wait(); println!("after wait"); })); } // Wait for other threads to finish. for handle in handles { handle.join().unwrap(); } }

use std::sync::{Arc, Barrier};
use std::thread;

let mut handles = Vec::with_capacity(10);
let barrier = Arc::new(Barrier::new(10));
for _ in 0..10 {
    let c = barrier.clone();
    // The same messages will be printed together.
    // You will NOT see any interleaving.
    handles.push(thread::spawn(move|| {
        println!("before wait");
        c.wait();
        println!("after wait");
    }));
}
// Wait for other threads to finish.
for handle in handles {
    handle.join().unwrap();
}

Methods

impl Barrier

fn new(n: usize) -> Barrier

Creates a new barrier that can block a given number of threads.

A barrier will block n-1 threads which call wait and then wake up all threads at once when the nth thread calls wait.

fn wait(&self) -> BarrierWaitResult

Blocks the current thread until all threads has rendezvoused here.

Barriers are re-usable after all threads have rendezvoused once, and can be used continuously.

A single (arbitrary) thread will receive a BarrierWaitResult that returns true from is_leader when returning from this function, and all other threads will receive a result that will return false from is_leader