v8/test/mjsunit/harmony/atomics-waitasync-worker-shutdown-before-wait-finished-2-waits.js

// 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);
        // Start 2 async waits in the same location.
        const result1 = Atomics.waitAsync(i32a, ${location}, 0);
        const result2 = Atomics.waitAsync(i32a, ${location}, 0);
        postMessage('worker waiting');
      }
    }`;
    const w = new Worker(script, {type : 'string'});
    w.postMessage({sab: sab});
    const m = w.getMessage();
    assertEquals('worker waiting', m);
    w.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);
})();