mirror of https://github.com/tc39/test262.git
74 lines
2.0 KiB
JavaScript
74 lines
2.0 KiB
JavaScript
// Copyright (C) 2018 Amal Hussein. 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.notify
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description: >
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An undefined index arg should translate to 0
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info: |
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Atomics.notify( typedArray, index, count )
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2.Let i be ? ValidateAtomicAccess(typedArray, index).
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...
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2.Let accessIndex be ? ToIndex(requestIndex).
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9.If IsSharedArrayBuffer(buffer) is false, throw a TypeError exception.
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...
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3.If bufferData is a Data Block, return false
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If value is undefined, then
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Let index be 0.
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includes: [atomicsHelper.js]
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features: [Atomics, SharedArrayBuffer, TypedArray]
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---*/
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var WAIT_INDEX = 0;
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var RUNNING = 1;
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var NUMAGENT = 2;
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for (var i = 0; i < NUMAGENT; i++) {
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab) {
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const i32a = new Int32Array(sab);
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// Notify main thread that the agent was started.
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Atomics.add(i32a, ${RUNNING}, 1);
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// Wait until restarted by main thread.
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var status = Atomics.wait(i32a, ${WAIT_INDEX}, 0);
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// Report wait status.
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$262.agent.report(status);
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$262.agent.leaving();
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});
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`);
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}
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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.safeBroadcast(i32a);
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// Wait until both agents started.
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$262.agent.waitUntil(i32a, RUNNING, NUMAGENT);
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// Try to yield control to ensure the agents actually started to wait.
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$262.agent.tryYield();
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// Notify at index 0, undefined => 0.
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var woken = 0;
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while ((woken = Atomics.notify(i32a, undefined, 1)) === 0) ;
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assert.sameValue(woken, 1, 'Atomics.notify(i32a, undefined, 1) returns 1');
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assert.sameValue($262.agent.getReport(), 'ok', '$262.agent.getReport() returns "ok"');
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// Notify again at index 0, default => 0.
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var woken = 0;
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while ((woken = Atomics.notify(i32a /*, default values used */)) === 0) ;
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assert.sameValue(woken, 1, 'Atomics.notify(i32a /*, default values used */) returns 1');
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assert.sameValue($262.agent.getReport(), 'ok', '$262.agent.getReport() returns "ok"');
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