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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /library/std/src/sync/barrier/tests.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/std/src/sync/barrier/tests.rs')
-rw-r--r--library/std/src/sync/barrier/tests.rs35
1 files changed, 35 insertions, 0 deletions
diff --git a/library/std/src/sync/barrier/tests.rs b/library/std/src/sync/barrier/tests.rs
new file mode 100644
index 000000000..834a3e751
--- /dev/null
+++ b/library/std/src/sync/barrier/tests.rs
@@ -0,0 +1,35 @@
+use crate::sync::mpsc::{channel, TryRecvError};
+use crate::sync::{Arc, Barrier};
+use crate::thread;
+
+#[test]
+#[cfg_attr(target_os = "emscripten", ignore)]
+fn test_barrier() {
+ const N: usize = 10;
+
+ let barrier = Arc::new(Barrier::new(N));
+ let (tx, rx) = channel();
+
+ for _ in 0..N - 1 {
+ let c = barrier.clone();
+ let tx = tx.clone();
+ thread::spawn(move || {
+ tx.send(c.wait().is_leader()).unwrap();
+ });
+ }
+
+ // At this point, all spawned threads should be blocked,
+ // so we shouldn't get anything from the port
+ assert!(matches!(rx.try_recv(), Err(TryRecvError::Empty)));
+
+ let mut leader_found = barrier.wait().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);
+}