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74 lines
2.2 KiB
JavaScript
74 lines
2.2 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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Waiter does not spuriously notify on index which is subject to Add operation
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info: |
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AddWaiter ( WL, waiterRecord )
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5. Append waiterRecord as the last element of WL.[[Waiters]]
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6. If waiterRecord.[[Timeout]] is finite, then in parallel,
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a. Wait waiterRecord.[[Timeout]] milliseconds.
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b. Perform TriggerTimeout(WL, waiterRecord).
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TriggerTimeout( WL, waiterRecord )
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3. If waiterRecord is in WL.[[Waiters]], then
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a. Set waiterRecord.[[Result]] to "timed-out".
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b. Perform RemoveWaiter(WL, waiterRecord).
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c. Perform NotifyWaiter(WL, waiterRecord).
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4. Perform LeaveCriticalSection(WL).
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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 TIMEOUT = $262.agent.timeouts.small;
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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.start(`
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$262.agent.receiveBroadcast(async (sab) => {
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const i32a = new Int32Array(sab);
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Atomics.add(i32a, ${RUNNING}, 1);
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const before = $262.agent.monotonicNow();
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const unpark = await Atomics.waitAsync(i32a, 0, 0, ${TIMEOUT}).value;
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const duration = $262.agent.monotonicNow() - before;
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$262.agent.report(duration);
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$262.agent.report(unpark);
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$262.agent.leaving();
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});
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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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Atomics.add(i32a, 0, 1);
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const lapse = await $262.agent.getReportAsync();
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assert(
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lapse >= TIMEOUT,
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'The result of evaluating `(lapse >= TIMEOUT)` is true'
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);
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const result = await $262.agent.getReportAsync();
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assert.sameValue(
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result,
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'timed-out',
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'The value of `result` is "timed-out"'
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);
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assert.sameValue(Atomics.notify(i32a, 0), 0, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)), 0) must return 0');
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}).then($DONE, $DONE);
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