GenericGrowableArray.java revision 9883:903a2e023ffb 
1/*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25package sun.jvm.hotspot.utilities;
26
27import java.util.*;
28import sun.jvm.hotspot.debugger.*;
29import sun.jvm.hotspot.runtime.*;
30import sun.jvm.hotspot.oops.*;
31import sun.jvm.hotspot.types.*;
32
33public class GenericGrowableArray extends VMObject {
34  static {
35    VM.registerVMInitializedObserver(new Observer() {
36        public void update(Observable o, Object data) {
37          initialize(VM.getVM().getTypeDataBase());
38        }
39      });
40  }
41
42  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
43    Type type      = db.lookupType("GenericGrowableArray");
44    _arena_field = type.getAddressField("_arena");
45    _max_field = new CIntField(type.getCIntegerField("_max"), 0);
46    _len_field = new CIntField(type.getCIntegerField("_len"), 0);
47  }
48
49  private static AddressField _arena_field;
50  private static CIntField _max_field;
51  private static CIntField _len_field;
52
53  public int max() {
54    return (int)_max_field.getValue(getAddress());
55  }
56
57  public int length() {
58    return (int)_len_field.getValue(getAddress());
59  }
60
61  public GenericGrowableArray(Address addr) {
62    super(addr);
63  }
64}
65