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// 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.
// run-pass
#![allow(unused_parens)]
// ignore-emscripten no threads support
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();
}
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