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J. Duke319a3b92007-12-01 00:00:00 +00001/*
2 * Copyright 2005-2006 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26package com.sun.jdi;
27
28/**
29 * Information about a monitor owned by a thread.
30 *
31 * @author Swamy Venkataramanappa
32 * @since 1.6
33 */
34
35public interface MonitorInfo extends Mirror {
36
37 /**
38 * Returns the {@link ObjectReference} object for the monitor.
39 * @return the {@link ObjectReference} object for the monitor.
40 * @throws InvalidStackFrameException if the associated stack
41 * frame has become invalid. Once the frame's thread is resumed,
42 * the stack frame is no longer valid.
43 * @see ThreadReference#ownedMonitorsAndFrames
44 * @since 1.6
45 */
46 public ObjectReference monitor();
47
48 /**
49 * Returns the stack depth at which this monitor was
50 * acquired by the owning thread. Returns -1 if the
51 * implementation cannot determine the stack depth
52 * (e.g., for monitors acquired by JNI MonitorEnter).
53 * @return the stack depth at which this monitor was
54 * acquired by the owning thread.
55 * @throws InvalidStackFrameException if the associated stack
56 * frame has become invalid. Once the frame's thread is resumed,
57 * the stack frame is no longer valid.
58 * @see ThreadReference#ownedMonitorsAndFrames
59 */
60 public int stackDepth();
61
62 /**
63 * Returns a {@link ThreadReference} object for the thread that
64 * owns the monitor.
65 * @return a {@link ThreadReference} object for the thread that
66 * owns the monitor.
67 * @throws InvalidStackFrameException if the associated stack
68 * frame has become invalid. Once the frame's thread is resumed,
69 * the stack frame is no longer valid.
70 * @see ThreadReference#frame
71 */
72 ThreadReference thread();
73}