6c4b2e0ef2
Errors in the callback were not correctly unlocking the mutex, oops. Bug: v8:12547 Change-Id: If44ebc023b8192605c9f29bfd4099a197110f5c4 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3760986 Commit-Queue: Shu-yu Guo <syg@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Cr-Commit-Position: refs/heads/main@{#81708}
47 lines
1.3 KiB
JavaScript
47 lines
1.3 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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