src/test/run-pass/task-comm-10.rs

   1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-emscripten no threads support
  12
  13 #![feature(std_misc)]
  14
  15 use std::thread;
  16 use std::sync::mpsc::{channel, Sender};
  17
  18 fn start(tx: &Sender<Sender<String>>) {
  19     let (tx2, rx) = channel();
  20     tx.send(tx2).unwrap();
  21
  22     let mut a;
  23     let mut b;
  24     a = rx.recv().unwrap();
  25     assert_eq!(a, "A".to_string());
  26     println!("{}", a);
  27     b = rx.recv().unwrap();
  28     assert_eq!(b, "B".to_string());
  29     println!("{}", b);
  30 }
  31
  32 pub fn main() {
  33     let (tx, rx) = channel();
  34     let child = thread::spawn(move|| { start(&tx) });
  35
  36     let mut c = rx.recv().unwrap();
  37     c.send("A".to_string()).unwrap();
  38     c.send("B".to_string()).unwrap();
  39     thread::yield_now();
  40
  41     child.join();
  42 }