mirror of https://github.com/tc39/test262.git
46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
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// Copyright (C) 2018 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.wait
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description: >
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Waiter does not spuriously wake on index which is subject to compareExchange operation
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features: [Atomics, SharedArrayBuffer, TypedArray]
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---*/
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function getReport() {
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var r;
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while ((r = $262.agent.getReport()) == null) {
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$262.agent.sleep(10);
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}
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return r;
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}
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const TIMEOUT = 2000;
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const i64a = new BigInt64Array(
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new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT)
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);
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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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const before = $262.agent.monotonicNow();
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const unpark = Atomics.wait(i64a, 0, 0, ${TIMEOUT});
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$262.agent.report($262.agent.monotonicNow() - before);
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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.broadcast(i64a.buffer);
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$262.agent.sleep(100);
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Atomics.compareExchange(i64a, 0, 0, 1);
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const lapse = getReport();
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assert(
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lapse >= TIMEOUT,
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`${lapse} should be at least ${TIMEOUT}`
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);
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assert.sameValue(getReport(), 'timed-out');
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assert.sameValue(Atomics.wake(i64a, 0), 0);
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