rust/src/test/run-pass/task-comm-6.rs

// Copyright 2012 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.

#![allow(dead_assignment)]

use std::sync::mpsc::channel;

pub fn main() { test00(); }

fn test00() {
    let mut r: int = 0;
    let mut sum: int = 0;
    let (tx, rx) = channel();
    let mut tx0 = tx.clone();
    let mut tx1 = tx.clone();
    let mut tx2 = tx.clone();
    let mut tx3 = tx.clone();
    let number_of_messages: int = 1000;
    let mut i: int = 0;
    while i < number_of_messages {
        tx0.send(i + 0).unwrap();
        tx1.send(i + 0).unwrap();
        tx2.send(i + 0).unwrap();
        tx3.send(i + 0).unwrap();
        i += 1;
    }
    i = 0;
    while i < number_of_messages {
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        i += 1;
    }
    assert_eq!(sum, 1998000);
    // assert (sum == 4 * ((number_of_messages *
    //                   (number_of_messages - 1)) / 2));

}