mirror of https://github.com/tc39/test262.git
50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
// Copyright (C) 2020 Rick Waldron. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-atomics.waitasync
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description: >
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Returns "not-equal" when value arg does not match an index in the typedArray
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info: |
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Atomics.waitAsync( typedArray, index, value, timeout )
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1. Return DoWait(async, typedArray, index, value, timeout).
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DoWait ( mode, typedArray, index, value, timeout )
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16. Let w be ! AtomicLoad(typedArray, i).
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17. If v is not equal to w, then
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a. Perform LeaveCriticalSection(WL).
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b. If mode is sync, then
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i. Return the String "not-equal".
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c. Perform ! Call(capability.[[Resolve]], undefined, « "not-equal" »).
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d. Return promiseCapability.[[Promise]].
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flags: [async]
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features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, computed-property-names, Symbol, Symbol.toPrimitive, Atomics, arrow-function]
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---*/
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assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
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const i32a = new Int32Array(
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new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
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);
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const valueOf = {
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valueOf() {
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return undefined;
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}
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};
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const toPrimitive = {
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[Symbol.toPrimitive]() {
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return undefined;
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}
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};
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Promise.all([
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Atomics.store(i32a, 0, 42),
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Atomics.waitAsync(i32a, 0, 0).value,
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]).then(outcomes => {
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assert.sameValue(outcomes[0], 42, 'The value of outcomes[0] is 42');
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assert.sameValue(outcomes[1], 'not-equal', 'The value of outcomes[1] is "not-equal"');
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}).then($DONE, $DONE);
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