1/*
2 * Copyright (c) 2003, 2015, 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.gc.parallel;
26
27import java.io.*;
28import java.util.*;
29
30import sun.jvm.hotspot.debugger.*;
31import sun.jvm.hotspot.memory.*;
32import sun.jvm.hotspot.runtime.*;
33import sun.jvm.hotspot.types.*;
34
35public class PSYoungGen extends VMObject {
36   static {
37      VM.registerVMInitializedObserver(new Observer() {
38         public void update(Observable o, Object data) {
39            initialize(VM.getVM().getTypeDataBase());
40         }
41      });
42   }
43
44   private static synchronized void initialize(TypeDataBase db) {
45      Type type = db.lookupType("PSYoungGen");
46      edenSpaceField = type.getAddressField("_eden_space");
47      fromSpaceField = type.getAddressField("_from_space");
48      toSpaceField = type.getAddressField("_to_space");
49   }
50
51   public PSYoungGen(Address addr) {
52      super(addr);
53   }
54
55   // Fields
56   private static AddressField edenSpaceField;
57   private static AddressField fromSpaceField;
58   private static AddressField toSpaceField;
59
60   // Accessors
61   public MutableSpace edenSpace() {
62      return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, edenSpaceField.getValue(addr));
63   }
64
65   public MutableSpace fromSpace() {
66      return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, fromSpaceField.getValue(addr));
67   }
68
69   public MutableSpace toSpace() {
70      return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, toSpaceField.getValue(addr));
71   }
72
73   public long capacity() {
74      return edenSpace().capacity() + fromSpace().capacity();
75   }
76
77   public long used() {
78      return edenSpace().used() + fromSpace().used();
79   }
80
81   public boolean isIn(Address a) {
82      if (edenSpace().contains(a)) {
83         return true;
84      }
85
86      if (fromSpace().contains(a)) {
87         return true;
88      }
89      return false;
90   }
91
92   public void printOn(PrintStream tty) {
93      tty.print("PSYoungGen [ ");
94      tty.print("eden = ");
95      edenSpace().printOn(tty);
96      tty.print(", from = ");
97      fromSpace().printOn(tty);
98      tty.print(", to = ");
99      toSpace().printOn(tty);
100      tty.print(" ] ");
101   }
102}
103