/**
* @license
* Copyright 2020 Roberto Luiz Souza Monteiro,
* Renata Souza Barreto,
* Hernane Borges de Barros Pereira.
*
* Licensed under the Apache License, Version 2.0 (the 'License');
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an 'AS IS' BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* MaiaScript multi-task library.
* @class
*/
function Task() {
init();
/**
* Creates the attributes of the class.
*/
function init() {
// Class attributes goes here.
}
/**
* Tests whether multi-tasking is supported in the browser.
* @return {boolean} Returns true if supported and false otherwise.
*/
this.isSupported = function() {
var res = false;
if (typeof(Worker) != "undefined") {
res = true;
}
return res;
}
/**
* Creates a new parallel task.
* The thread will be created in a new scope.
* For communication with the master thread, the postMessage function (method) and onmessage event must be used.
* To finish executing the thread, the terminate method must be executed.
* To import a script from within the thread, you can use the importScripts function.
* @param {object} func - Function that will be executed on a new thread.
* @return {object} An object to interact with the created thread.
*/
this.new = function(func) {
var worker;
if (typeof(Worker) != "undefined") {
var script = func.toString().match(/^\s*function\s*\(\s*\)\s*\{(([\s\S](?!\}$))*[\s\S])/)[1];
var blob = new Blob([script], {type:'text/javascript'});
if (typeof(window) != "undefined") {
var blobURL = window.URL.createObjectURL(blob);
} else {
var blobURL = 'data:,' + script;
}
worker = new Worker(blobURL);
}
return worker;
}
}
task = new Task();
if (typeof process !== 'undefined') {
try {
var Worker = require('web-worker');
} catch (e) {
console.error(e.message);
}
try {
var Blob = require('cross-blob');
} catch (e) {
console.error(e.message);
}
}