tests/ui/box/unit/unique-send-2.rs

   1 // run-pass
   2 #![allow(unused_must_use)]
   3 // ignore-emscripten no threads support
   4
   5 use std::sync::mpsc::{channel, Sender};
   6 use std::thread;
   7
   8 fn child(tx: &Sender<Box<usize>>, i: usize) {
   9     tx.send(Box::new(i)).unwrap();
  10 }
  11
  12 pub fn main() {
  13     let (tx, rx) = channel();
  14     let n = 100;
  15     let mut expected = 0;
  16     let ts = (0..n).map(|i| {
  17         expected += i;
  18         let tx = tx.clone();
  19         thread::spawn(move|| {
  20             child(&tx, i)
  21         })
  22     }).collect::<Vec<_>>();
  23
  24     let mut actual = 0;
  25     for _ in 0..n {
  26         let j = rx.recv().unwrap();
  27         actual += *j;
  28     }
  29
  30     assert_eq!(expected, actual);
  31
  32     for t in ts { t.join(); }
  33 }