Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/WorkerThread.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | c18cbe5936b8 |
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/* * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.utilities; /** This class abstracts the notion of a worker thread which is fed tasks in the form of Runnables. */ public class WorkerThread { private volatile boolean done = false; private MessageQueueBackend mqb; private MessageQueue mq; public WorkerThread() { mqb = new MessageQueueBackend(); mq = mqb.getFirstQueue(); new Thread(new MainLoop()).start(); } /** Runs the given Runnable in the thread represented by this WorkerThread object at an unspecified later time. */ public void invokeLater(Runnable runnable) { mq.writeMessage(runnable); } /** Can be used to dispose of the internal worker thread. Note that this method may return before the internal worker thread terminates. */ public void shutdown() { done = true; mq.writeMessage(new Runnable() { public void run() {} }); } class MainLoop implements Runnable { private MessageQueue myMq; public MainLoop() { myMq = mqb.getSecondQueue(); } public void run() { while (!done) { Runnable runnable = (Runnable) myMq.readMessage(); try { runnable.run(); } catch (Exception e) { e.printStackTrace(); } } } } }