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1   /*
2    * Copyright (c) 2000, 2003, 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
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23   */
24  
25  package sun.jvm.hotspot.memory;
26  
27  import java.util.*;
28  
29  import sun.jvm.hotspot.debugger.*;
30  import sun.jvm.hotspot.runtime.*;
31  import sun.jvm.hotspot.types.*;
32  
33  public class GenerationSpec extends VMObject {
34    private static CIntegerField nameField;
35    private static CIntegerField initSizeField;
36    private static CIntegerField maxSizeField;
37  
38    static {
39      VM.registerVMInitializedObserver(new Observer() {
40          public void update(Observable o, Object data) {
41            initialize(VM.getVM().getTypeDataBase());
42          }
43        });
44    }
45  
46    private static synchronized void initialize(TypeDataBase db) {
47      Type type = db.lookupType("GenerationSpec");
48  
49      nameField       = type.getCIntegerField("_name");
50      initSizeField = type.getCIntegerField("_init_size");
51      maxSizeField  = type.getCIntegerField("_max_size");
52    }
53  
54    public GenerationSpec(Address addr) {
55      super(addr);
56    }
57  
58    public Generation.Name name() {
59      return Generation.nameForEnum((int)nameField.getValue(addr));
60    }
61  
62    public long initSize() {
63      return initSizeField.getValue(addr);
64    }
65  
66    public long maxSize() {
67      return maxSizeField.getValue(addr);
68    }
69  }