非境界チャネル

mpsc::channel() を使うと、非境界かつ非同期のチャネルを取得できます:

// Copyright 2022 Google LLC
// SPDX-License-Identifier: Apache-2.0

use std::sync::mpsc;
use std::thread;
use std::time::Duration;

fn main() {
    let (tx, rx) = mpsc::channel();

    thread::spawn(move || {
        let thread_id = thread::current().id();
        for i in 0..10 {
            tx.send(format!("Message {i}")).unwrap();
            println!("{thread_id:?}: sent Message {i}");
        }
        println!("{thread_id:?}: done");
    });
    thread::sleep(Duration::from_millis(100));

    for msg in rx {
        println!("Main: got {msg}");
    }
}