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) 2017 Mozilla Corporation. 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 timed out and that
the time to time out is reasonable.
info: |
17. Let awoken be Suspend(WL, W, t).
18. If awoken is true, then
a. Assert: W is not on the list of waiters in WL.
19. Else,
a.Perform RemoveWaiter(WL, W).
includes: [atomicsHelper.js]
features: [Atomics, BigInt, SharedArrayBuffer, TypedArray]
---*/
const RUNNING = 1;
const TIMEOUT = $262.agent.timeouts.small;
const i64a = new BigInt64Array(
new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)
);
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i64a = new BigInt64Array(sab);
Atomics.add(i64a, ${RUNNING}, 1n);
const before = $262.agent.monotonicNow();
const unpark = Atomics.wait(i64a, 0, 0n, ${TIMEOUT});
const duration = $262.agent.monotonicNow() - before;
$262.agent.report(duration);
$262.agent.report(unpark);
$262.agent.leaving();
});
`);
$262.agent.safeBroadcast(i64a);
$262.agent.waitUntil(i64a, RUNNING, 1n);
// Try to yield control to ensure the agent actually started to wait.
$262.agent.tryYield();
// NO OPERATION OCCURS HERE!
const lapse = $262.agent.getReport();
assert(
lapse >= TIMEOUT,
'The result of `(lapse >= TIMEOUT)` is true'
);
assert.sameValue(
$262.agent.getReport(),
'timed-out',
'$262.agent.getReport() returns "timed-out"'
);
assert.sameValue(Atomics.notify(i64a, 0), 0, 'Atomics.notify(i64a, 0) returns 0');
reportCompare(0, 0);