-
Notifications
You must be signed in to change notification settings - Fork 28
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Signed-off-by: John Nunley <dev@notgull.net>
- Loading branch information
Showing
1 changed file
with
45 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,45 @@ | ||
#![cfg(loom)] | ||
|
||
use loom::sync::{mpsc, Arc}; | ||
use loom::thread; | ||
|
||
use async_lock::Barrier; | ||
|
||
#[test] | ||
fn barrier_smoke() { | ||
loom::model(|| { | ||
const N: usize = 10; | ||
|
||
let barrier = Arc::new(Barrier::new(N)); | ||
|
||
for _ in 0..10 { | ||
let (tx, rx) = mpsc::channel(); | ||
|
||
for _ in 0..loom::MAX_THREADS - 1 { | ||
let c = barrier.clone(); | ||
let tx = tx.clone(); | ||
|
||
thread::spawn(move || { | ||
let res = c.wait_blocking(); | ||
tx.send(res.is_leader()).unwrap(); | ||
}); | ||
} | ||
|
||
// At this point, all spawned threads should be blocked, | ||
// so we shouldn't get anything from the cahnnel. | ||
let res = rx.try_recv(); | ||
assert!(res.is_err()); | ||
|
||
let mut leader_found = barrier.wait_blocking().is_leader(); | ||
|
||
// Now, the barrier is cleared and we should get data. | ||
for _ in 0..N - 1 { | ||
if rx.recv().unwrap() { | ||
assert!(!leader_found); | ||
leader_found = true; | ||
} | ||
} | ||
assert!(leader_found); | ||
} | ||
}); | ||
} |