Added Asynchronous tasks, usage sending

src/pocketmine/scheduler/AsyncTask.php

@@ -0,0 +1,91 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+
+ *
+ *
+*/
+
+namespace pocketmine\scheduler;
+
+/**
+ * Class used to run async tasks in other threads.
+ *
+ * WARNING: Do not call PocketMine-MP API methods from other Threads!!
+ */
+abstract class AsyncTask extends \Threaded{
+
+	private $complete;
+	private $finished;
+	private $result;
+
+	public function run(){
+		$this->synchronized(function(){
+			$this->result = null;
+			$this->onRun(\Thread::getCurrentThread());
+			$this->finished = true;
+			$this->complete = $this->result === null ? true : false;
+		});
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function isCompleted(){
+		return $this->complete === true;
+	}
+
+	/**
+	 * @return mixed
+	 */
+	public function getResult(){
+		return $this->synchronized(function(){
+			$this->finished = true;
+			return @unserialize($this->result);
+		});
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function hasResult(){
+		return $this->result !== null;
+	}
+
+	/**
+	 * @param mixed $result
+	 */
+	public function setResult($result){
+		$this->result = @serialize($result);
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function isFinished(){
+		return $this->finished === true;
+	}
+
+	/**
+	 * Actions to execute when run
+	 *
+	 * @param \Thread $thread
+	 *
+	 * @return void
+	 */
+	public abstract function onRun(\Thread $thread);
+
+}