Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
// 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.
includes: [atomicsHelper.js]
features: [Atomics, SharedArrayBuffer, TypedArray]
---*/
const RUNNING = 1;
const TIMEOUT = $262.agent.timeouts.huge;
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i32a = new Int32Array(sab);
Atomics.add(i32a, ${RUNNING}, 1);
const before = $262.agent.monotonicNow();
const unpark = Atomics.wait(i32a, 0, 0, ${TIMEOUT});
const duration = $262.agent.monotonicNow() - before;
$262.agent.report(duration);
$262.agent.report(unpark);
$262.agent.leaving();
});
`);
const i32a = new Int32Array(
new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
);
$262.agent.safeBroadcast(i32a);
$262.agent.waitUntil(i32a, RUNNING, 1);
// Try to yield control to ensure the agent actually started to wait.
$262.agent.tryYield();
assert.sameValue(Atomics.notify(i32a, 0), 1, 'Atomics.notify(i32a, 0) returns 1');
const lapse = $262.agent.getReport();
assert(
lapse < TIMEOUT,
'The result of `(lapse < TIMEOUT)` is true'
);
assert.sameValue($262.agent.getReport(), 'ok', '$262.agent.getReport() returns "ok"');
reportCompare(0, 0);