01: /*
02: * $RCSfile: FreeListManager.java,v $
03: *
04: * Copyright 2001-2008 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
06: *
07: * This code is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License version 2 only, as
09: * published by the Free Software Foundation. Sun designates this
10: * particular file as subject to the "Classpath" exception as provided
11: * by Sun in the LICENSE file that accompanied this code.
12: *
13: * This code is distributed in the hope that it will be useful, but WITHOUT
14: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: * version 2 for more details (a copy is included in the LICENSE file that
17: * accompanied this code).
18: *
19: * You should have received a copy of the GNU General Public License version
20: * 2 along with this work; if not, write to the Free Software Foundation,
21: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
22: *
23: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
24: * CA 95054 USA or visit www.sun.com if you need additional information or
25: * have any questions.
26: *
27: * $Revision: 1.8 $
28: * $Date: 2008/02/28 20:17:21 $
29: * $State: Exp $
30: */
31:
32: package javax.media.j3d;
33:
34: class FreeListManager {
35:
36: private static final boolean DEBUG = false;
37:
38: // constants that represent the freelists managed by the Manager
39: static final int DISPLAYLIST = 0;
40: static final int TEXTURE2D = 1;
41: static final int TEXTURE3D = 2;
42:
43: private static int maxFreeListNum = 2;
44:
45: // what list we are going to shrink next
46: private static int currlist = 0;
47:
48: static MemoryFreeList[] freelist = null;
49:
50: static void createFreeLists() {
51: maxFreeListNum = 2;
52: freelist = new MemoryFreeList[maxFreeListNum + 1];
53: freelist[DISPLAYLIST] = new IntegerFreeList();
54: freelist[TEXTURE2D] = new IntegerFreeList();
55: freelist[TEXTURE3D] = new IntegerFreeList();
56:
57: }
58:
59: // see if the current list can be shrunk
60: static void manageLists() {
61: // System.err.println("manageLists");
62: if (freelist[currlist] != null) {
63: freelist[currlist].shrink();
64: }
65:
66: currlist++;
67: if (currlist > maxFreeListNum)
68: currlist = 0;
69: }
70:
71: // return the freelist specified by the list param
72: static MemoryFreeList getFreeList(int list) {
73: if (list < 0 || list > maxFreeListNum) {
74: if (DEBUG)
75: System.err.println("illegal list");
76: return null;
77: } else {
78: return freelist[list];
79: }
80: }
81:
82: static Object getObject(int listId) {
83: return freelist[listId].getObject();
84: }
85:
86: static void freeObject(int listId, Object obj) {
87: freelist[listId].add(obj);
88: }
89:
90: static void clearList(int listId) {
91: freelist[listId].clear();
92: }
93:
94: }
|