mirror of https://github.com/tc39/test262.git
49 lines
1.2 KiB
JavaScript
49 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.wake
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description: >
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Test that Atomics.wake wakes agents in the order they are waiting.
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---*/
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// Create workers and start them all spinning. We set atomic slots to make
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// them go into a wait, thus controlling the waiting order. Then we wake them
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// one by one and observe the wakeup order.
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for ( var i=0 ; i < 3 ; i++ ) {
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$262.agent.start(
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`
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$262.agent.receiveBroadcast(function (sab) {
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var ia = new Int32Array(sab);
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while (Atomics.load(ia, ${i+1}) == 0);
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$262.agent.report(${i} + Atomics.wait(ia, 0, 0));
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$262.agent.leaving();
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})
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`);
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}
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var ia = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT*4));
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$262.agent.broadcast(ia.buffer);
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// Make them sleep in order 0 1 2 on ia[0]
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for ( var i=0 ; i < 3 ; i++ ) {
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Atomics.store(ia, i+1, 1);
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$262.agent.sleep(500);
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}
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// Wake them up one at a time and check the order is 0 1 2
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for ( var i=0 ; i < 3 ; i++ ) {
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assert.sameValue(Atomics.wake(ia, 0, 1), 1);
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assert.sameValue(getReport(), i + "ok");
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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(100);
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return r;
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}
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