From 7a2e20caac9db6f789a7b3fab344b9758af45335 Mon Sep 17 00:00:00 2001
From: Harvey Harrison <harvey.harrison@gmail.com>
Date: Sun, 19 Apr 2015 21:02:06 -0700
Subject: j3dcore: flatten the directory structure a bit
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
src/javax/media/j3d/IndexedObject.java | 68 ++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 src/javax/media/j3d/IndexedObject.java
(limited to 'src/javax/media/j3d/IndexedObject.java')
diff --git a/src/javax/media/j3d/IndexedObject.java b/src/javax/media/j3d/IndexedObject.java
new file mode 100644
index 0000000..a739769
--- /dev/null
+++ b/src/javax/media/j3d/IndexedObject.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2001-2008 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;
+
+/**
+ * Class used for IndexedUnorderedList
+ */
+
+abstract class IndexedObject extends Object {
+
+ /**
+ * A 2D array listIdx[3][len] is used.
+ * The entry listIdx[0][], listIdx[0][1] is used for each VirtualUniverse.
+ * The entry listIdx[2][0] is used for index to which one to use.
+ *
+ * This is used to handle the case the Node Object move from
+ * one VirtualUniverse A to another VirtualUniverse B.
+ * It is possible that another Structures in B may get the add
+ * message first before the Structures in A get the remove
+ * message to clear the entry. This cause MT problem. So a
+ * 2D array is used to resolve it.
+ */
+ int[][] listIdx;
+
+ abstract VirtualUniverse getVirtualUniverse();
+
+ synchronized int getIdxUsed(VirtualUniverse u) {
+ int idx = listIdx[2][0];
+ if (u == getVirtualUniverse()) {
+ return idx;
+ }
+ return (idx == 0 ? 1 : 0);
+ }
+
+ void incIdxUsed() {
+ if (listIdx[2][0] == 0) {
+ listIdx[2][0] = 1;
+ } else {
+ listIdx[2][0] = 0;
+ }
+ }
+}
+
+
--
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