1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package nsk.share.locks;
import nsk.share.Wicket;
/*
* Thread class used for deadlock creation, requires instance of DeadlockLocker to created deadlock.
* Objects of DeadlockedThread should not be created directly, to create deadlocked threads
* use class DeadlockMaker
*/
public class DeadlockedThread extends Thread {
private DeadlockLocker locker;
private Wicket dedlockResolutionWicket = new Wicket();
// should call readyWicket.unlock() when deadlock is ready
public DeadlockedThread(DeadlockLocker locker) {
this.locker = locker;
}
public void run() {
locker.lock();
// reach here if deadlock was resolved
dedlockResolutionWicket.unlockAll();
// sleep if deadlock was resolved
try {
sleep(Long.MAX_VALUE);
} catch (InterruptedException e) {
// ignore
}
}
// If it is expected that deadlock with using of this DeadlockedThread should be resolved
// this method can be used for waiting this event
public void waitDeadlockResolution() {
// if deadlock was resolved DeadlockedThread calls dedlockResolutionWicket.unlockAll()
dedlockResolutionWicket.waitFor();
}
public DeadlockLocker getLocker() {
return locker;
}
}
|
