mirror of https://github.com/rust-lang/rust
37 lines
764 B
Rust
37 lines
764 B
Rust
//@ run-pass
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#![allow(unused_parens)]
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//@ needs-threads
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use std::sync::mpsc::{channel, Sender};
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use std::thread;
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pub fn main() {
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let (tx, rx) = channel();
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// Spawn 10 threads each sending us back one isize.
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let mut i = 10;
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while (i > 0) {
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println!("{}", i);
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let tx = tx.clone();
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thread::spawn({let i = i; move|| { child(i, &tx) }});
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i = i - 1;
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}
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// Spawned threads are likely killed before they get a chance to send
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// anything back, so we deadlock here.
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i = 10;
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while (i > 0) {
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println!("{}", i);
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rx.recv().unwrap();
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i = i - 1;
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}
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println!("main thread exiting");
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}
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fn child(x: isize, tx: &Sender<isize>) {
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println!("{}", x);
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tx.send(x).unwrap();
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}
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