src/test/ui/run-pass/threads-sendsync/task-comm-7.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 // run-pass
  12 // ignore-emscripten no threads support
  13
  14 use std::sync::mpsc::{channel, Sender};
  15 use std::thread;
  16
  17 pub fn main() { test00(); }
  18
  19 fn test00_start(c: &Sender<isize>, start: isize,
  20                 number_of_messages: isize) {
  21     let mut i: isize = 0;
  22     while i < number_of_messages { c.send(start + i).unwrap(); i += 1; }
  23 }
  24
  25 fn test00() {
  26     let mut r: isize = 0;
  27     let mut sum: isize = 0;
  28     let (tx, rx) = channel();
  29     let number_of_messages: isize = 10;
  30
  31     let tx2 = tx.clone();
  32     let t1 = thread::spawn(move|| {
  33         test00_start(&tx2, number_of_messages * 0, number_of_messages);
  34     });
  35     let tx2 = tx.clone();
  36     let t2 = thread::spawn(move|| {
  37         test00_start(&tx2, number_of_messages * 1, number_of_messages);
  38     });
  39     let tx2 = tx.clone();
  40     let t3 = thread::spawn(move|| {
  41         test00_start(&tx2, number_of_messages * 2, number_of_messages);
  42     });
  43     let tx2 = tx.clone();
  44     let t4 = thread::spawn(move|| {
  45         test00_start(&tx2, number_of_messages * 3, number_of_messages);
  46     });
  47
  48     let mut i: isize = 0;
  49     while i < number_of_messages {
  50         r = rx.recv().unwrap();
  51         sum += r;
  52         r = rx.recv().unwrap();
  53         sum += r;
  54         r = rx.recv().unwrap();
  55         sum += r;
  56         r = rx.recv().unwrap();
  57         sum += r;
  58         i += 1;
  59     }
  60
  61     assert_eq!(sum, number_of_messages * 4 * (number_of_messages * 4 - 1) / 2);
  62
  63     t1.join();
  64     t2.join();
  65     t3.join();
  66     t4.join();
  67 }