Two threads sending messages

---

• Sending messages from more than one spawned threads to the main thread.

examples/threads/threads-messages-multiple-sources/src/main.rs

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

fn main() {
    let (tx1, rx) = mpsc::channel();
    let tx2 = tx1.clone();

    println!("{:?}: start", thread::current().id());

    thread::spawn(move || {
        for i in 1..=5 {
            thread::sleep(Duration::from_millis(1));
            tx1.send(format!("{:?}: {}", thread::current().id(), i))
                .unwrap();
        }
        println!("Spawned thread {:?} ends", thread::current().id());
    });

    thread::spawn(move || {
        for i in 1..=5 {
            thread::sleep(Duration::from_millis(1));
            tx2.send(format!("{:?}: {}", thread::current().id(), i))
                .unwrap();
        }
        println!("Spawned thread {:?} ends", thread::current().id());
    });

    for received in rx {
        println!("Received: {received}");
    }

    println!("Main thread ends");
}

ThreadId(1): start
Received: ThreadId(2): 1
Received: ThreadId(3): 1
Received: ThreadId(2): 2
Received: ThreadId(3): 2
Received: ThreadId(2): 3
Received: ThreadId(3): 3
Received: ThreadId(2): 4
Received: ThreadId(3): 4
Spawned thread ThreadId(2) ends
Received: ThreadId(2): 5
Spawned thread ThreadId(3) ends
Received: ThreadId(3): 5
Main thread ends