mirror of
https://github.com/nodejs/node.git
synced 2025-05-16 00:11:20 +00:00
9d7cd9b864
PR-URL: https://github.com/nodejs/node/pull/54077 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
// Copyright 2024 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
//
|
|
// Flags: --harmony-struct --allow-natives-syntax
|
|
|
|
(function TestAsyncPromiseResolveValueAndChain() {
|
|
let mutex = new Atomics.Mutex();
|
|
let thenExecuted = false;
|
|
let waitResolve;
|
|
let waitPromise = new Promise((resolve) => {
|
|
waitResolve = resolve;
|
|
});
|
|
|
|
// If the return value of the callback is a promise, then lockPromise will
|
|
// be resolved when the promise is resolved.
|
|
let lockPromise = Atomics.Mutex.lockAsync(mutex, async function() {
|
|
return waitPromise;
|
|
});
|
|
|
|
assertFalse(Atomics.Mutex.tryLock(mutex, function() {}).success);
|
|
waitResolve(42);
|
|
|
|
lockPromise.then((result) => {
|
|
assertTrue(Atomics.Mutex.tryLock(mutex, function() {}).success);
|
|
assertEquals(0, %AtomicsSychronizationNumAsyncWaitersInIsolateForTesting());
|
|
// lockPromise is resolved with the same value as the callback promise.
|
|
thenExecuted = true;
|
|
assertEquals(42, result.value);
|
|
assertTrue(result.success);
|
|
});
|
|
|
|
// The lock and then callbacks will be executed when the microtask queue is
|
|
// flushed, before proceeding to the next task.
|
|
setTimeout(() => {
|
|
assertTrue(thenExecuted);
|
|
}, 0);
|
|
})();
|