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

Comparing jsr166/src/test/tck/AtomicMarkableReferenceTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.10 by jsr166, Tue Nov 17 03:12:51 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 JSR166TestCase{
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		/**
21	<	*
21	>	*  constructor initializes to given reference and mark
22		*/
23	<	public void testConstructor(){
23	>	public void testConstructor() {
24		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
25		assertEquals(one,ai.getReference());
26		assertFalse(ai.isMarked());
#	Line 35 | Line 31 | public class AtomicMarkableReferenceTest
31		}
32
33		/**
34	<	*
34	>	*  get returns the last values of reference and mark set
35		*/
36	<	public void testGetSet(){
36	>	public void testGetSet() {
37		boolean[] mark = new boolean[1];
38		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
39		assertEquals(one,ai.getReference());
#	Line 57 | Line 53 | public class AtomicMarkableReferenceTest
53		}
54
55		/**
56	<	*
56	>	* attemptMark succeeds in single thread
57		*/
58	<	public void testAttemptMark(){
58	>	public void testAttemptMark() {
59		boolean[] mark = new boolean[1];
60		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
61		assertFalse(ai.isMarked());
#	Line 70 | Line 66 | public class AtomicMarkableReferenceTest
66		}
67
68		/**
69	<	*
69	>	* compareAndSet succeeds in changing values if equal to expected reference
70	>	* and mark else fails
71		*/
72	<	public void testCompareAndSet(){
72	>	public void testCompareAndSet() {
73		boolean[] mark = new boolean[1];
74		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
75		assertEquals(one, ai.get(mark));
#	Line 93 | Line 90 | public class AtomicMarkableReferenceTest
90		}
91
92		/**
93	<	*
93	>	* compareAndSet in one thread enables another waiting for reference value
94	>	* to succeed
95		*/
96	<	public void testWeakCompareAndSet(){
96	>	public void testCompareAndSetInMultipleThreads() throws Exception {
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	>
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	>
111	>	/**
112	>	* compareAndSet in one thread enables another waiting for mark value
113	>	* to succeed
114	>	*/
115	>	public void testCompareAndSetInMultipleThreads2() throws Exception {
116	>	final AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
117	>	Thread t = new Thread(new Runnable() {
118	>	public void run() {
119	>	while (!ai.compareAndSet(one, one, true, false)) Thread.yield();
120	>	}});
121	>
122	>	t.start();
123	>	assertTrue(ai.compareAndSet(one, one, false, true));
124	>	t.join(LONG_DELAY_MS);
125	>	assertFalse(t.isAlive());
126	>	assertEquals(ai.getReference(), one);
127	>	assertFalse(ai.isMarked());
128	>	}
129	>
130	>	/**
131	>	* repeated weakCompareAndSet succeeds in changing values when equal
132	>	* to expected
133	>	*/
134	>	public void testWeakCompareAndSet() {
135		boolean[] mark = new boolean[1];
136		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
137		assertEquals(one, ai.get(mark));
138		assertFalse(ai.isMarked());
139		assertFalse(mark[0]);
140
141	<	while(!ai.weakCompareAndSet(one, two, false, false));
141	>	while (!ai.weakCompareAndSet(one, two, false, false));
142		assertEquals(two, ai.get(mark));
143		assertFalse(mark[0]);
144
145	<	while(!ai.weakCompareAndSet(two, m3, false, true));
145	>	while (!ai.weakCompareAndSet(two, m3, false, true));
146		assertEquals(m3, ai.get(mark));
147		assertTrue(mark[0]);
148		}

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