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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Copyright (c) 1999, 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.
*/
/*
* @test
* @summary Basic functional test of InheritableThreadLocal
* @author Josh Bloch
*/
public class Basic {
static InheritableThreadLocal n = new InheritableThreadLocal() {
protected Object initialValue() {
return new Integer(0);
}
protected Object childValue(Object parentValue) {
return new Integer(((Integer)parentValue).intValue() + 1);
}
};
static int threadCount = 100;
static int x[];
public static void main(String args[]) throws Exception {
x = new int[threadCount];
Thread progenitor = new MyThread();
progenitor.start();
// Wait for *all* threads to complete
progenitor.join();
// Check results
for(int i=0; i<threadCount; i++)
if (x[i] != i)
throw(new Exception("x[" + i + "] =" + x[i]));
}
private static class MyThread extends Thread {
public void run() {
Thread child = null;
if (((Integer)(n.get())).intValue() < threadCount-1) {
child = new MyThread();
child.start();
}
Thread.currentThread().yield();
int threadId = ((Integer)(n.get())).intValue();
for (int j=0; j<threadId; j++) {
x[threadId]++;
Thread.currentThread().yield();
}
// Wait for child (if any)
if (child != null) {
try {
child.join();
} catch(InterruptedException e) {
throw(new RuntimeException("Interrupted"));
}
}
}
}
}
|
