mirror of https://github.com/rust-lang/rust
34 lines
645 B
Rust
34 lines
645 B
Rust
//@ run-pass
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#![allow(unused_must_use)]
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//@ needs-threads
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use std::sync::mpsc::{channel, Sender};
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use std::thread;
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fn child(tx: &Sender<Box<usize>>, i: usize) {
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tx.send(Box::new(i)).unwrap();
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}
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pub fn main() {
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let (tx, rx) = channel();
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let n = 100;
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let mut expected = 0;
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let ts = (0..n).map(|i| {
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expected += i;
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let tx = tx.clone();
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thread::spawn(move|| {
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child(&tx, i)
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})
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}).collect::<Vec<_>>();
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let mut actual = 0;
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for _ in 0..n {
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let j = rx.recv().unwrap();
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actual += *j;
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}
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assert_eq!(expected, actual);
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for t in ts { t.join(); }
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}
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