Temas importantes de Rust
Rust Channels: mpsc
Send messages from one thread to another instead of sharing memory.
Lo que aprenderás
- mpsc::channel
- send and receive
- How a channel closes
Producer to main
- 1
sender.sendproducer thread - 2
channelstep 1, step 2, step 3 - 3
for message in receivermain thread
A one-way pipe between threads
A channel is a one-way pipe between threads. One side sends values and the other receives them, so threads can work together without sharing memory.
channel returns a sender and a receiver. The producer thread owns the sender and sends three messages. When the thread ends, the sender is dropped and the channel closes, which ends the for loop over the receiver.
Puntos clave
channel()returns a sender and a receiver.- The receiver can be used in a for loop.
- Dropping the sender closes the channel.
Ejemplo ejecutable de Rust
main.rs
use std::sync::mpsc;
use std::thread;
fn main() {
let (sender, receiver) = mpsc::channel();
let producer = thread::spawn(move || {
for step in 1..=3 {
sender.send(format!("step {step} done")).unwrap();
}
}); // sender is dropped here, which closes the channel
for message in receiver {
println!("received: {message}");
}
producer.join().unwrap();
println!("all messages received");
}
received: step 1 done
received: step 2 done
received: step 3 done
all messages receivedPractica
Abre el ejemplo en el compilador online, cambia un valor o añade una línea y predice la salida antes de ejecutarlo. Después rompe el código a propósito y lee el mensaje del compilador.
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