mirror of https://github.com/tc39/test262.git
38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
// Copyright (C) 2017 Mozilla Corporation. 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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description: >
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Test that Atomics.wait actually waits and does not spuriously wake
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up when the memory value is changed.
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includes: [atomicsHelper.js]
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---*/
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$.agent.start(
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`
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$.agent.receiveBroadcast(function (sab, id) {
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var ia = new Int32Array(sab);
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var then = Date.now();
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Atomics.wait(ia, 0, 0);
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var diff = Date.now() - then; // Should be about 1000 ms
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$.agent.report(diff);
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$.agent.leaving();
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})
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`);
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var ia = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT));
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$.agent.broadcast(ia.buffer);
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$.agent.sleep(500); // Give the agent a chance to wait
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Atomics.store(ia, 0, 1); // Change the value, should not wake the agent
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$.agent.sleep(500); // Wait some more so that we can tell
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Atomics.wake(ia, 0); // Really wake it up
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assert.sameValue(Math.abs((getReport()|0) - 1000) < $ATOMICS_MAX_TIME_EPSILON, true);
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function getReport() {
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var r;
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while ((r = $.agent.getReport()) == null)
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$.agent.sleep(100);
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return r;
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}
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