| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![feature(std_misc)] |
| |
| use std::sync::mpsc::{channel, Sender}; |
| use std::thread; |
| |
| pub fn main() { |
| let (tx, rx) = channel(); |
| |
| // Spawn 10 threads each sending us back one isize. |
| let mut i = 10; |
| while (i > 0) { |
| println!("{}", i); |
| let tx = tx.clone(); |
| thread::spawn({let i = i; move|| { child(i, &tx) }}); |
| i = i - 1; |
| } |
| |
| // Spawned threads are likely killed before they get a chance to send |
| // anything back, so we deadlock here. |
| |
| i = 10; |
| while (i > 0) { |
| println!("{}", i); |
| rx.recv().unwrap(); |
| i = i - 1; |
| } |
| |
| println!("main thread exiting"); |
| } |
| |
| fn child(x: isize, tx: &Sender<isize>) { |
| println!("{}", x); |
| tx.send(x).unwrap(); |
| } |