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PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --harmony-struct
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let mutex = new Atomics.Mutex;
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let locked_count = 0;
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assertEquals(42, Atomics.Mutex.lock(mutex, () => {
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locked_count++; return 42;
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}));
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assertEquals(locked_count, 1);
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// tryLock returns true when successful.
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assertTrue(Atomics.Mutex.tryLock(mutex, () => { locked_count++; }));
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assertEquals(locked_count, 2);
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// Recursively locking throws.
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Atomics.Mutex.lock(mutex, () => {
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locked_count++;
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assertThrows(() => {
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Atomics.Mutex.lock(mutex, () => { throw "unreachable"; });
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}, Error);
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});
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assertEquals(locked_count, 3);
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// Recursive tryLock'ing returns false.
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Atomics.Mutex.lock(mutex, () => {
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locked_count++;
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assertFalse(Atomics.Mutex.tryLock(mutex, () => { throw "unreachable"; }));
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});
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assertEquals(locked_count, 4);
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// Throwing in the callback should unlock the mutex.
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assertThrowsEquals(() => {
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Atomics.Mutex.lock(mutex, () => { throw 42; });
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}, 42);
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Atomics.Mutex.lock(mutex, () => { locked_count++; });
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assertEquals(locked_count, 5);
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assertThrowsEquals(() => {
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Atomics.Mutex.tryLock(mutex, () => { throw 42; });
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}, 42);
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Atomics.Mutex.tryLock(mutex, () => { locked_count++; });
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assertEquals(locked_count, 6);
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// Mutexes can be assigned to shared objects.
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(function TestMutexCanBeAssignedToSharedObjects() {
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const Box = new SharedStructType(["payload"]);
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const box = new Box;
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box.payload = mutex;
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})();
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