blob: 885c2b2b2210356a9ff1645a572aa518d71fc77f (
plain)
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
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
package jsr166;
import junit.framework.*;
import java.util.concurrent.Semaphore;
public class ThreadLocalTest extends JSR166TestCase {
static ThreadLocal<Integer> tl = new ThreadLocal<Integer>() {
public Integer initialValue() {
return one;
}
};
static InheritableThreadLocal<Integer> itl =
new InheritableThreadLocal<Integer>() {
protected Integer initialValue() {
return zero;
}
protected Integer childValue(Integer parentValue) {
return new Integer(parentValue.intValue() + 1);
}
};
/**
* remove causes next access to return initial value
*/
public void testRemove() {
assertSame(tl.get(), one);
tl.set(two);
assertSame(tl.get(), two);
tl.remove();
assertSame(tl.get(), one);
}
/**
* remove in InheritableThreadLocal causes next access to return
* initial value
*/
public void testRemoveITL() {
assertSame(itl.get(), zero);
itl.set(two);
assertSame(itl.get(), two);
itl.remove();
assertSame(itl.get(), zero);
}
private class ITLThread extends Thread {
final int[] x;
ITLThread(int[] array) { x = array; }
public void run() {
Thread child = null;
if (itl.get().intValue() < x.length - 1) {
child = new ITLThread(x);
child.start();
}
Thread.yield();
int threadId = itl.get().intValue();
for (int j = 0; j < threadId; j++) {
x[threadId]++;
Thread.yield();
}
if (child != null) { // Wait for child (if any)
try {
child.join();
} catch (InterruptedException e) {
threadUnexpectedException(e);
}
}
}
}
/**
* InheritableThreadLocal propagates generic values.
*/
public void testGenericITL() throws InterruptedException {
final int threadCount = 10;
final int x[] = new int[threadCount];
Thread progenitor = new ITLThread(x);
progenitor.start();
progenitor.join();
for (int i = 0; i < threadCount; i++) {
assertEquals(i, x[i]);
}
}
}
|
