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 #![feature(std_misc)]
  12
  13 use std::thread;
  14 use std::sync::mpsc::{channel, Sender};
  15
  16 fn start(tx: &Sender<Sender<String>>) {
  17     let (tx2, rx) = channel();
  18     tx.send(tx2).unwrap();
  19
  20     let mut a;
  21     let mut b;
  22     a = rx.recv().unwrap();
  23     assert_eq!(a, "A".to_string());
  24     println!("{}", a);
  25     b = rx.recv().unwrap();
  26     assert_eq!(b, "B".to_string());
  27     println!("{}", b);
  28 }
  29
  30 pub fn main() {
  31     let (tx, rx) = channel();
  32     let child = thread::spawn(move|| { start(&tx) });
  33
  34     let mut c = rx.recv().unwrap();
  35     c.send("A".to_string()).unwrap();
  36     c.send("B".to_string()).unwrap();
  37     thread::yield_now();
  38
  39     child.join();
  40 }