Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| skip async -- Atomics.waitAsync is not supported
// Copyright (C) 2020 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.waitasync
description: >
Returns "not-equal" when value arg does not match an index in the typedArray
info: |
Atomics.waitAsync( typedArray, index, value, timeout )
1. Return DoWait(async, typedArray, index, value, timeout).
DoWait ( mode, typedArray, index, value, timeout )
16. Let w be ! AtomicLoad(typedArray, i).
17. If v is not equal to w, then
a. Perform LeaveCriticalSection(WL).
b. If mode is sync, then
i. Return the String "not-equal".
c. Perform ! Call(capability.[[Resolve]], undefined, « "not-equal" »).
d. Return promiseCapability.[[Promise]].
flags: [async]
includes: [atomicsHelper.js]
features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, BigInt, arrow-function, async-functions]
---*/
assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
const RUNNING = 1;
const value = 42n;
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i64a = new BigInt64Array(sab);
Atomics.add(i64a, ${RUNNING}, 1n);
$262.agent.report(Atomics.store(i64a, 0, 42n));
$262.agent.report(Atomics.waitAsync(i64a, 0, 0n).value);
$262.agent.leaving();
});
`);
const i64a = new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4));
$262.agent.safeBroadcastAsync(i64a, RUNNING, 1n).then(async agentCount => {
assert.sameValue(agentCount, 1n, 'The value of `agentCount` is 1n');
assert.sameValue(
await $262.agent.getReportAsync(),
value.toString(),
'(await $262.agent.getReportAsync()) must return the same value returned by value.toString()'
);
assert.sameValue(
await $262.agent.getReportAsync(),
'not-equal',
'(await $262.agent.getReportAsync()) resolves to the value "not-equal"'
);
assert.sameValue(
Atomics.notify(i64a, 0, 1),
0,
'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)), 0, 1) must return 0'
);
}).then($DONE, $DONE);