/*

* 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 org.scijava.java3d;

class FreeListManager {

private static final boolean DEBUG = false;

// constants that represent the freelists managed by the Manager

static final int DISPLAYLIST = 0;

private static int maxFreeListNum = 0;

// what list we are going to shrink next

private static int currlist = 0;

static MemoryFreeList[] freelist = null;

static void createFreeLists() {

maxFreeListNum = 0;

freelist = new MemoryFreeList[maxFreeListNum+1];

freelist[DISPLAYLIST] = new IntegerFreeList();

}

// see if the current list can be shrunk

static void manageLists() {

// System.err.println("manageLists");

if (freelist[currlist] != null) {

freelist[currlist].shrink();

}

currlist++;

if (currlist > maxFreeListNum) currlist = 0;

}

// return the freelist specified by the list param

static MemoryFreeList getFreeList(int list) {

if (list < 0 || list > maxFreeListNum) {

if (DEBUG) System.err.println("illegal list");

return null;

}

else {

return freelist[list];

}

}

static Object getObject(int listId) {

return freelist[listId].getObject();

}

static void freeObject(int listId, Object obj) {

freelist[listId].add(obj);

}

static void clearList(int listId) {

freelist[listId].clear();

}

}