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// Copyright 2015 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --harmony-sharedarraybuffer
if (this.Worker) {
(function TestClone() {
var workerScript =
`onmessage = function(m) {
var sab = m;
var ta = new Uint32Array(sab);
if (sab.byteLength !== 16) {
throw new Error('SharedArrayBuffer clone byteLength');
}
for (var i = 0; i < 4; ++i) {
if (ta[i] !== i) {
throw new Error('SharedArrayBuffer clone value ' + i);
}
}
// Atomically update ta[0]
Atomics.store(ta, 0, 100);
};`;
var w = new Worker(workerScript, {type: 'string'});
var sab = new SharedArrayBuffer(16);
var ta = new Uint32Array(sab);
for (var i = 0; i < 4; ++i) {
ta[i] = i;
}
// Clone SharedArrayBuffer
w.postMessage(sab);
assertEquals(16, sab.byteLength); // ArrayBuffer should not be neutered.
// Spinwait for the worker to update ta[0]
var ta0;
while ((ta0 = Atomics.load(ta, 0)) == 0) {}
assertEquals(100, ta0);
w.terminate();
assertEquals(16, sab.byteLength); // Still not neutered.
})();
(function TestCloneMulti() {
var workerScript =
`onmessage = function(msg) {
var sab = msg.sab;
var id = msg.id;
var ta = new Uint32Array(sab);
Atomics.store(ta, id, 1);
postMessage(id);
};`;
var sab = new SharedArrayBuffer(16);
var ta = new Uint32Array(sab);
var id;
var workers = [];
for (id = 0; id < 4; ++id) {
workers[id] = new Worker(workerScript, {type: 'string'});
workers[id].postMessage({sab: sab, id: id});
}
// Spinwait for each worker to update ta[id]
var count = 0;
while (count < 4) {
for (id = 0; id < 4; ++id) {
if (Atomics.compareExchange(ta, id, 1, -1) == 1) {
// Worker is finished.
assertEquals(id, workers[id].getMessage());
workers[id].terminate();
count++;
}
}
}
})();
}
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