mirror of https://github.com/tc39/test262.git
67 lines
2.0 KiB
JavaScript
67 lines
2.0 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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includes: [atomicsHelper.js]
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features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, arrow-function, async-functions]
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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 RUNNING = 1;
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const value = 42;
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab) {
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const i32a = new Int32Array(sab);
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Atomics.add(i32a, ${RUNNING}, 1);
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$262.agent.report(Atomics.store(i32a, 0, ${value}));
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$262.agent.report(Atomics.waitAsync(i32a, 0, 0).value);
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$262.agent.leaving();
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});
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`);
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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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$262.agent.safeBroadcastAsync(i32a, RUNNING, 1).then(async (agentCount) => {
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assert.sameValue(agentCount, 1, 'The value of `agentCount` is 1');
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assert.sameValue(
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await $262.agent.getReportAsync(),
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'42',
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'(await $262.agent.getReportAsync()) resolves to the value "42"'
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);
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assert.sameValue(
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await $262.agent.getReportAsync(),
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'not-equal',
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'(await $262.agent.getReportAsync()) resolves to the value "not-equal"'
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);
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assert.sameValue(
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Atomics.notify(i32a, 0, 1),
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0,
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'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)), 0, 1) must return 0'
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);
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}).then($DONE, $DONE);
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