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90 lines
2.9 KiB
JavaScript
90 lines
2.9 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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Get the correct WaiterList
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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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11. Let indexedPosition be (i × 4) + offset.
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12. Let WL be GetWaiterList(block, indexedPosition).
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GetWaiterList( block, i )
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...
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4. Return the WaiterList that is referenced by the pair (block, i).
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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', 'The value of `typeof Atomics.waitAsync` is "function"');
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const NUMAGENT = 2;
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const RUNNING = 4;
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$262.agent.start(`
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$262.agent.receiveBroadcast(async (sab) => {
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const i64a = new BigInt64Array(sab);
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Atomics.add(i64a, ${RUNNING}, 1n);
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// Wait on index 0
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$262.agent.report(await Atomics.waitAsync(i64a, 0, 0n, Infinity).value);
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$262.agent.leaving();
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});
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`);
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$262.agent.start(`
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$262.agent.receiveBroadcast(async (sab) => {
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const i64a = new BigInt64Array(sab);
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Atomics.add(i64a, ${RUNNING}, 1n);
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// Wait on index 2
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$262.agent.report(await Atomics.waitAsync(i64a, 2, 0n, Infinity).value);
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$262.agent.leaving();
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});
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`);
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const i64a = new BigInt64Array(
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new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 5)
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);
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$262.agent.safeBroadcastAsync(i64a, RUNNING, BigInt(NUMAGENT)).then(async (agentCount) => {
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assert.sameValue(
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agentCount,
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BigInt(NUMAGENT),
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'The value of `agentCount` must return the same value returned by BigInt(NUMAGENT)'
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);
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// Notify index 1, notifies nothing
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assert.sameValue(Atomics.notify(i64a, 1), 0, 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 5)), 1) must return 0');
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// Notify index 3, notifies nothing
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assert.sameValue(Atomics.notify(i64a, 3), 0, 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 5)), 3) must return 0');
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// Notify index 2, notifies 1
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assert.sameValue(Atomics.notify(i64a, 2), 1, 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 5)), 2) must return 1');
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assert.sameValue(
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await $262.agent.getReportAsync(),
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'ok',
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'(await $262.agent.getReportAsync()) resolves to the value "ok"'
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);
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// Notify index 0, notifies 1
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assert.sameValue(Atomics.notify(i64a, 0), 1, 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 5)), 0) must return 1');
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assert.sameValue(
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await $262.agent.getReportAsync(),
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'ok',
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'(await $262.agent.getReportAsync()) resolves to the value "ok"'
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);
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}).then($DONE, $DONE);
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