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diff --git a/src/javax/media/j3d/J3dThreadData.java b/src/javax/media/j3d/J3dThreadData.java
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+++ b/src/javax/media/j3d/J3dThreadData.java
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+/*
+ * Copyright 1998-2008 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;
+
+/**
+ * The J3dThreadData is the data wrapper for threads in Java 3D.
+ */
+
+class J3dThreadData extends Object {
+    /**
+     * Thread run options
+     */
+    static final int WAIT_ALL_THREADS = 0x01;
+    static final int CONT_THREAD      = 0x02;
+    static final int WAIT_THIS_THREAD = 0x04;
+    static final int START_TIMER      = 0x08;
+    static final int STOP_TIMER       = 0x10;
+    static final int LAST_STOP_TIMER  = 0x20;
+    //static final int LOCK_RENDERBIN   = 0x20;
+    //static final int RELEASE_RENDERBIN = 0x40;
+
+    /**
+     * The thread for this data
+     */
+    J3dThread thread = null;
+
+    /**
+     * The last time that a message was sent to this thread.
+     */
+    long lastUpdateTime = -1;
+
+    /**
+     * The last time that this thread was run
+     */
+    long lastRunTime = -1;
+
+    /**
+     * The thread type
+     */
+    int threadType = 0;
+
+    /**
+     * The run options for this thread.
+     */
+    int threadOpts = 0;
+
+    /**
+     * The arguments to be passed to this thread
+     */
+    Object threadArgs = null;
+
+    /**
+     * This indicates whether or not this thread needs to run.
+     */
+    boolean needsRun = false;
+
+    /**
+     * The following data is only used by the Render Thread
+     */
+
+    /**
+     * The type of the thread invocation.  RENDER or SWAP
+     */
+    int type = 0;
+
+    /**
+     * The view that this Render invocation belongs to.
+     */
+    View view = null;
+
+    /**
+     * The Canvas3D that this Render invocation belongs to.
+     * It is null for the SWAP invocation.
+     */
+    Canvas3D canvas = null;
+
+    /**
+     * This constructor does nothing
+     */
+    J3dThreadData() {
+    }
+}