| // Copyright 2020 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: --allow-natives-syntax --harmony-sharedarraybuffer --harmony-atomics-waitasync |
| |
| (function test() { |
| const sab = new SharedArrayBuffer(16); |
| const i32a = new Int32Array(sab); |
| const location = 0; |
| |
| (function createWorker() { |
| const script = `onmessage = function(msg) { |
| if (msg.sab) { |
| const i32a = new Int32Array(msg.sab); |
| Atomics.waitAsync(i32a, ${location}, 0); |
| postMessage('worker waiting'); |
| } |
| }`; |
| // Create 2 workers which wait on the same location. |
| let workers = []; |
| const worker_count = 2; |
| for (let i = 0; i < worker_count; ++i) { |
| workers[i] = new Worker(script, {type : 'string'}); |
| workers[i].postMessage({sab: sab}); |
| const m = workers[i].getMessage(); |
| assertEquals('worker waiting', m); |
| } |
| for (let i = 0; i < worker_count; ++i) { |
| workers[i].terminateAndWait(); |
| } |
| })(); |
| |
| const notify_return_value = Atomics.notify(i32a, location, 2); |
| // No waiters got notified, since they got cleaned up before it. |
| assertEquals(0, notify_return_value); |
| })(); |