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
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  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 JIntField 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.getJIntField("_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 (int)threadIdField.getValue(addr);
  60     }
  61 
  62 }