68 lines
1.4 KiB
Rust
68 lines
1.4 KiB
Rust
use std::sync::mpsc;
|
|
use std::thread;
|
|
use std::time::Duration;
|
|
|
|
use crossbeam_utils::sync::WaitGroup;
|
|
|
|
const THREADS: usize = 10;
|
|
|
|
#[test]
|
|
fn wait() {
|
|
let wg = WaitGroup::new();
|
|
let (tx, rx) = mpsc::channel();
|
|
|
|
for _ in 0..THREADS {
|
|
let wg = wg.clone();
|
|
let tx = tx.clone();
|
|
|
|
thread::spawn(move || {
|
|
wg.wait();
|
|
tx.send(()).unwrap();
|
|
});
|
|
}
|
|
|
|
thread::sleep(Duration::from_millis(100));
|
|
|
|
// At this point, all spawned threads should be blocked, so we shouldn't get anything from the
|
|
// channel.
|
|
assert!(rx.try_recv().is_err());
|
|
|
|
wg.wait();
|
|
|
|
// Now, the wait group is cleared and we should receive messages.
|
|
for _ in 0..THREADS {
|
|
rx.recv().unwrap();
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn wait_and_drop() {
|
|
let wg = WaitGroup::new();
|
|
let wg2 = WaitGroup::new();
|
|
let (tx, rx) = mpsc::channel();
|
|
|
|
for _ in 0..THREADS {
|
|
let wg = wg.clone();
|
|
let wg2 = wg2.clone();
|
|
let tx = tx.clone();
|
|
|
|
thread::spawn(move || {
|
|
wg2.wait();
|
|
tx.send(()).unwrap();
|
|
drop(wg);
|
|
});
|
|
}
|
|
|
|
// At this point, no thread has gotten past `wg2.wait()`, so we shouldn't get anything from the
|
|
// channel.
|
|
assert!(rx.try_recv().is_err());
|
|
drop(wg2);
|
|
|
|
wg.wait();
|
|
|
|
// Now, the wait group is cleared and we should receive messages.
|
|
for _ in 0..THREADS {
|
|
rx.try_recv().unwrap();
|
|
}
|
|
}
|