test262/test/built-ins/Atomics/wait/was-woken-before-timeout.js

// Copyright (C) 2018 Amal Hussein. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.wait
description: >
  Test that Atomics.wait returns the right result when it was awoken before
  a timeout
info: |
  Atomics.wait( typedArray, index, value, timeout )

  2.Let i be ? ValidateAtomicAccess(typedArray, index).
    ...
      2.Let accessIndex be ? ToIndex(requestIndex).

      9.If IsSharedArrayBuffer(buffer) is false, throw a TypeError exception.
        ...
          3.If bufferData is a Data Block, return false

          If value is undefined, then
          Let index be 0.
features: [Atomics, SharedArrayBuffer, TypedArray]
---*/

var sleeping = 100;
var timeout = 20000;

function getReport() {
  var r;
  while ((r = $262.agent.getReport()) == null) {
    sleeping += 100;
    $262.agent.sleep(100);
  }
  return r;
}

$262.agent.start(
`
$262.agent.receiveBroadcast(function(sab) {
  var int32Array = new Int32Array(sab);
  $262.agent.report(Atomics.wait(int32Array, 0, 0, ${timeout}));
  $262.agent.leaving();
});
`);

var sab = new SharedArrayBuffer(4);
var int32Array = new Int32Array(sab);


$262.agent.broadcast(int32Array.buffer);
$262.agent.sleep(sleeping);

assert.sameValue(Atomics.wake(int32Array, 0), 1);

assert.sameValue(getReport(), "ok");
assert(sleeping < timeout, "this test assumes it won't last for more than 20 seconds");