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
|
/*************************************************
*
* = PACKAGE
* tests.Concurrency
*
* = FILENAME
* RWMutexTest.java
*
*@author Ross Dargahi (rossd@krinfo.com)
*
*************************************************/
package tests.Concurrency;
import JACE.OS.*;
import JACE.Concurrency.*;
class TestThread extends Thread
{
TestThread(String name,
boolean writer,
RWMutex lock)
{
super (name);
mWriter = writer;
mLock = lock;
}
public void run()
{
for (int i = 0; i < 10; i++)
{
try
{
if (!mWriter)
{
mLock.acquireRead();
ACE.DEBUG (getName() + ": Acquired Read Lock");
int sleepTime = i * 100;
sleep (sleepTime);
mLock.release ();
ACE.DEBUG (getName () + ": Released Read Lock");
}
else
{
mLock.acquireWrite ();
ACE.DEBUG (getName () + ": Acquired Write Lock");
int sleepTime = i * 100;
sleep (sleepTime);
mLock.release ();
ACE.DEBUG (getName () + ": Released Write Lock");
}
}
catch (InterruptedException ex)
{
ACE.ERROR ("InterruptedException");
}
}
}
RWMutex mLock;
boolean mWriter;
}
public class RWMutexTest
{
public static void main(String [] args)
{
RWMutex lock = new RWMutex();
TestThread t1 = new TestThread ("1", false, lock);
TestThread t2 = new TestThread ("2", false, lock);
TestThread t3 = new TestThread ("3", false, lock);
TestThread t4 = new TestThread ("4", true, lock);
TestThread t5 = new TestThread ("5", false, lock);
TestThread t6 = new TestThread ("6", false, lock);
TestThread t7 = new TestThread ("7", false, lock);
TestThread t8 = new TestThread ("8", true, lock);
t1.start ();
t2.start ();
t3.start ();
t4.start ();
t5.start ();
t6.start ();
t7.start ();
t8.start ();
}
}
|
