mirror of https://github.com/tc39/test262.git
40 lines
1.2 KiB
JavaScript
40 lines
1.2 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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esid: sec-atomics.wait
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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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features: [Atomics, SharedArrayBuffer, TypedArray]
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---*/
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab, id) {
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var i32a = new Int32Array(sab);
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var then = Date.now();
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Atomics.wait(i32a, 0, 0);
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var diff = Date.now() - then; // Should be about 1000 ms but can be more
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$262.agent.report(diff);
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$262.agent.leaving();
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})
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`);
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var i32a = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT));
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$262.agent.broadcast(i32a.buffer);
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$262.agent.sleep(500); // Give the agent a chance to wait
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Atomics.store(i32a, 0, 1); // Change the value, should not wake the agent
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$262.agent.sleep(500); // Wait some more so that we can tell
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Atomics.wake(i32a, 0); // Really wake it up
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assert.sameValue((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 = $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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