Senders and Receivers

Rust channels have two parts: a Sender and a Receiver. The two parts are connected via the channel, but you only see the end-points.

use std::sync::mpsc;
fn main() {
    let (tx, rx) = mpsc::channel();
    tx.send(10).unwrap();
    tx.send(20).unwrap();
    println!("Received: {:?}", rx.recv());
    println!("Received: {:?}", rx.recv());
    let tx2 = tx.clone();
    tx2.send(30).unwrap();
    println!("Received: {:?}", rx.recv());
}

This slide should take about 9 minutes.

• mpsc stands for Multi-Producer, Single-Consumer. Sender and SyncSender implement Clone (so you can make multiple producers) but Receiver does not.
• send() and recv() return Result. If they return Err, it means the counterpart Sender or Receiver is dropped and the channel is closed.