Mercurial > hg > graal-jvmci-8
diff agent/src/share/classes/sun/jvm/hotspot/utilities/WorkerThread.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/WorkerThread.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,73 @@ +/* + * Copyright 2000-2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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(); + } + } + } + } +}