6151ae0127
Atomics.load, Atomics.store, and Atomics.exchange now accept shared array objects as their 1st argument. Currently these are implemented in C++ and not yet in CSA. Bug: v8:12547 Change-Id: I54ed8816a696a4f45dda964739b1cfd917d39dc0 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3723974 Reviewed-by: Shu-yu Guo <syg@chromium.org> Reviewed-by: Camillo Bruni <cbruni@chromium.org> Commit-Queue: Luis Fernando Pardo Sixtos <lpardosixtos@microsoft.com> Cr-Commit-Position: refs/heads/main@{#81537}
43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
// Copyright 2022 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
//
|
|
// Flags: --shared-string-table --harmony-struct --allow-natives-syntax
|
|
|
|
'use strict';
|
|
|
|
if (this.Worker) {
|
|
(function TestSharedArrayPostMessage() {
|
|
let workerScript = `onmessage = function(arr) {
|
|
// Non-atomic write that will be made visible once main thread
|
|
// observes the atomic write below.
|
|
arr[0][0] = 42;
|
|
arr[1].payload = 84;
|
|
Atomics.store(arr, 2, "worker");
|
|
};
|
|
postMessage("started");`;
|
|
|
|
let worker = new Worker(workerScript, {type: 'string'});
|
|
let started = worker.getMessage();
|
|
assertEquals('started', started);
|
|
|
|
let OuterArray = new SharedArray(3);
|
|
let Struct = new SharedStructType(['payload']);
|
|
OuterArray[0] = new SharedArray(1);
|
|
OuterArray[1] = new Struct();
|
|
OuterArray[2] = 'main';
|
|
assertEquals(undefined, OuterArray[0][0]);
|
|
assertEquals(undefined, OuterArray[1].payload);
|
|
assertEquals('main', OuterArray[2]);
|
|
worker.postMessage(OuterArray);
|
|
// Spin until we observe the worker's write on index 2.
|
|
while (Atomics.load(OuterArray, 2) !== 'worker') {
|
|
}
|
|
// The non-atomic store write must also be visible.
|
|
assertEquals(42, OuterArray[0][0]);
|
|
assertEquals(84, OuterArray[1].payload);
|
|
|
|
worker.terminate();
|
|
})();
|
|
}
|