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root/jsr166/jsr166/src/test/tck/AtomicMarkableReferenceTest.java

Comparing jsr166/src/test/tck/AtomicMarkableReferenceTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.9 by jsr166, Mon Nov 16 05:30:07 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.atomic.*;
11
12	<	public class AtomicMarkableReferenceTest extends TestCase{
12	>	public class AtomicMarkableReferenceTest extends JSR166TestCase {
13		public static void main (String[] args) {
14		junit.textui.TestRunner.run (suite());
15		}
16		public static Test suite() {
17		return new TestSuite(AtomicMarkableReferenceTest.class);
18		}
18	–
19	–	static final Integer zero = new Integer(0);
20	–	static final Integer one = new Integer(1);
21	–	static final Integer two = new Integer(2);
22	–	static final Integer m3  = new Integer(-3);
19
20	<	public void testConstructor(){
20	>	/**
21	>	*  constructor initializes to given reference and mark
22	>	*/
23	>	public void testConstructor() {
24		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
25		assertEquals(one,ai.getReference());
26		assertFalse(ai.isMarked());
#	Line 31 | Line 30 | public class AtomicMarkableReferenceTest
30
31		}
32
33	<	public void testGetSet(){
33	>	/**
34	>	*  get returns the last values of reference and mark set
35	>	*/
36	>	public void testGetSet() {
37		boolean[] mark = new boolean[1];
38		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
39		assertEquals(one,ai.getReference());
#	Line 50 | Line 52 | public class AtomicMarkableReferenceTest
52		assertTrue(mark[0]);
53		}
54
55	<	public void testAttemptMark(){
55	>	/**
56	>	* attemptMark succeeds in single thread
57	>	*/
58	>	public void testAttemptMark() {
59		boolean[] mark = new boolean[1];
60		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
61		assertFalse(ai.isMarked());
#	Line 60 | Line 65 | public class AtomicMarkableReferenceTest
65		assertTrue(mark[0]);
66		}
67
68	<	public void testCompareAndSet(){
68	>	/**
69	>	* compareAndSet succeeds in changing values if equal to expected reference
70	>	* and mark else fails
71	>	*/
72	>	public void testCompareAndSet() {
73		boolean[] mark = new boolean[1];
74		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
75		assertEquals(one, ai.get(mark));
#	Line 80 | Line 89 | public class AtomicMarkableReferenceTest
89		assertTrue(mark[0]);
90		}
91
92	<	public void testWeakCompareAndSet(){
92	>	/**
93	>	* compareAndSet in one thread enables another waiting for reference value
94	>	* to succeed
95	>	*/
96	>	public void testCompareAndSetInMultipleThreads() {
97	>	final AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
98	>	Thread t = new Thread(new Runnable() {
99	>	public void run() {
100	>	while (!ai.compareAndSet(two, three, false, false)) Thread.yield();
101	>	}});
102	>	try {
103	>	t.start();
104	>	assertTrue(ai.compareAndSet(one, two, false, false));
105	>	t.join(LONG_DELAY_MS);
106	>	assertFalse(t.isAlive());
107	>	assertEquals(ai.getReference(), three);
108	>	assertFalse(ai.isMarked());
109	>	}
110	>	catch (Exception e) {
111	>	unexpectedException();
112	>	}
113	>	}
114	>
115	>	/**
116	>	* compareAndSet in one thread enables another waiting for mark value
117	>	* to succeed
118	>	*/
119	>	public void testCompareAndSetInMultipleThreads2() {
120	>	final AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
121	>	Thread t = new Thread(new Runnable() {
122	>	public void run() {
123	>	while (!ai.compareAndSet(one, one, true, false)) Thread.yield();
124	>	}});
125	>	try {
126	>	t.start();
127	>	assertTrue(ai.compareAndSet(one, one, false, true));
128	>	t.join(LONG_DELAY_MS);
129	>	assertFalse(t.isAlive());
130	>	assertEquals(ai.getReference(), one);
131	>	assertFalse(ai.isMarked());
132	>	}
133	>	catch (Exception e) {
134	>	unexpectedException();
135	>	}
136	>	}
137	>
138	>	/**
139	>	* repeated weakCompareAndSet succeeds in changing values when equal
140	>	* to expected
141	>	*/
142	>	public void testWeakCompareAndSet() {
143		boolean[] mark = new boolean[1];
144		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
145		assertEquals(one, ai.get(mark));
146		assertFalse(ai.isMarked());
147		assertFalse(mark[0]);
148
149	<	while(!ai.weakCompareAndSet(one, two, false, false));
149	>	while (!ai.weakCompareAndSet(one, two, false, false));
150		assertEquals(two, ai.get(mark));
151		assertFalse(mark[0]);
152
153	<	while(!ai.weakCompareAndSet(two, m3, false, true));
153	>	while (!ai.weakCompareAndSet(two, m3, false, true));
154		assertEquals(m3, ai.get(mark));
155		assertTrue(mark[0]);
156		}

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