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
25package sun.jvm.hotspot.runtime;
26
27import java.util.*;
28import sun.jvm.hotspot.debugger.*;
29import 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.
33public 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}
63