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1   /*
2    * Copyright (c) 2004, 2013, 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
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24  
25  package sun.jvm.hotspot.runtime;
26  
27  import java.util.*;
28  import sun.jvm.hotspot.debugger.*;
29  import sun.jvm.hotspot.types.*;
30  
31  // The OSThread class holds OS-specific thread information.  It is equivalent
32  // to the sys_thread_t structure of the classic JVM implementation.
33  public class OSThread extends VMObject {
34      private static JIntField interruptedField;
35      private static Field threadIdField;
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("OSThread");
46          interruptedField = type.getJIntField("_interrupted");
47          threadIdField = type.getField("_thread_id");
48      }
49  
50      public OSThread(Address addr) {
51          super(addr);
52      }
53  
54      public boolean interrupted() {
55          return ((int)interruptedField.getValue(addr)) != 0;
56      }
57  
58      public int threadId() {
59          return threadIdField.getJInt(addr);
60      }
61  
62  }