mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-12 16:45:37 +00:00
34 lines
725 B
Rust
34 lines
725 B
Rust
// run-pass
|
|
#![allow(unused_must_use)]
|
|
#![allow(unused_mut)]
|
|
// ignore-emscripten no threads support
|
|
|
|
use std::thread;
|
|
use std::sync::mpsc::{channel, Sender};
|
|
|
|
fn start(tx: &Sender<Sender<String>>) {
|
|
let (tx2, rx) = channel();
|
|
tx.send(tx2).unwrap();
|
|
|
|
let mut a;
|
|
let mut b;
|
|
a = rx.recv().unwrap();
|
|
assert_eq!(a, "A".to_string());
|
|
println!("{}", a);
|
|
b = rx.recv().unwrap();
|
|
assert_eq!(b, "B".to_string());
|
|
println!("{}", b);
|
|
}
|
|
|
|
pub fn main() {
|
|
let (tx, rx) = channel();
|
|
let child = thread::spawn(move|| { start(&tx) });
|
|
|
|
let mut c = rx.recv().unwrap();
|
|
c.send("A".to_string()).unwrap();
|
|
c.send("B".to_string()).unwrap();
|
|
thread::yield_now();
|
|
|
|
child.join();
|
|
}
|