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/*
* Copyright 1999-2008 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* 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 javax.media.j3d;
/**
* Master control thread. The MasterControlThread object and thread
* are created dynamically whenever needed. Once created, the thread
* runs until all other threads are terminated. Then the master
* control thread terminates. There is never more than one
* MasterControl object or thread in existence at any one time.
*/
class MasterControlThread extends Thread {
private static int numInstances = 0;
private int instanceNum = -1;
private static synchronized int newInstanceNum() {
return (++numInstances);
}
private int getInstanceNum() {
if (instanceNum == -1)
instanceNum = newInstanceNum();
return instanceNum;
}
MasterControlThread(ThreadGroup threadGroup) {
super(threadGroup, "");
setName("J3D-MasterControl-" + getInstanceNum());
VirtualUniverse.mc.createMCThreads();
this.start();
}
@Override
public void run() {
do {
while (VirtualUniverse.mc.running) {
VirtualUniverse.mc.doWork();
// NOTE: no need to call Thread.yield(), since we will
// call wait() if there is no work to do (yield seems
// to be a no-op on Windows anyway)
}
} while (!VirtualUniverse.mc.mcThreadDone());
if(J3dDebug.devPhase) {
J3dDebug.doDebug(J3dDebug.masterControl, J3dDebug.LEVEL_1,
"MC: MasterControl Thread Terminate");
}
}
}
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