mirror of https://github.com/tc39/test262.git
63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
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// 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, BigInt, arrow-function, async-functions]
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---*/
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assert.sameValue(typeof Atomics.waitAsync, 'function');
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const RUNNING = 1;
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const value = 42n;
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab) {
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const i64a = new BigInt64Array(sab);
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Atomics.add(i64a, ${RUNNING}, 1n);
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$262.agent.report(Atomics.store(i64a, 0, 42n));
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$262.agent.report(Atomics.waitAsync(i64a, 0, 0n).value);
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$262.agent.leaving();
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});
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`);
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const i64a = new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4));
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$262.agent.safeBroadcastAsync(i64a, RUNNING, 1n).then(async agentCount => {
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assert.sameValue(agentCount, 1n);
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assert.sameValue(
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await $262.agent.getReportAsync(),
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value.toString(),
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'Atomics.store(i64a, 0, 42n) returns 42'
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);
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assert.sameValue(
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await $262.agent.getReportAsync(),
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'not-equal',
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'Atomics.waitAsync(i64a, 0, 0n).value resolves to "not-equal"'
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);
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assert.sameValue(
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Atomics.notify(i64a, 0, 1),
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0,
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'Atomics.notify(i64a, 0, 1) returns 0 (nothing to notify)'
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);
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}).then($DONE, $DONE);
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