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

Comparing jsr166/src/test/tck/AtomicMarkableReferenceTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.21 by jsr166, Wed Dec 31 19:21:20 2014 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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	<	import java.util.concurrent.atomic.*;
9	>	import java.util.concurrent.atomic.AtomicMarkableReference;
10
11	<	public class AtomicMarkableReferenceTest extends JSR166TestCase{
12	<	public static void main (String[] args) {
13	<	junit.textui.TestRunner.run (suite());
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicMarkableReferenceTest extends JSR166TestCase {
15	>	public static void main(String[] args) {
16	>	junit.textui.TestRunner.run(suite());
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicMarkableReferenceTest.class);
20		}
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);
21
22	<	public void testConstructor(){
22	>	/**
23	>	* constructor initializes to given reference and mark
24	>	*/
25	>	public void testConstructor() {
26		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
27	<	assertEquals(one,ai.getReference());
28	<	assertFalse(ai.isMarked());
27	>	assertSame(one, ai.getReference());
28	>	assertFalse(ai.isMarked());
29		AtomicMarkableReference a2 = new AtomicMarkableReference(null, true);
30	<	assertNull(a2.getReference());
31	<	assertTrue(a2.isMarked());
31	<
30	>	assertNull(a2.getReference());
31	>	assertTrue(a2.isMarked());
32		}
33
34	<	public void testGetSet(){
34	>	/**
35	>	* get returns the last values of reference and mark set
36	>	*/
37	>	public void testGetSet() {
38		boolean[] mark = new boolean[1];
39		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
40	<	assertEquals(one,ai.getReference());
41	<	assertFalse(ai.isMarked());
42	<	assertEquals(one, ai.get(mark));
43	<	assertFalse(mark[0]);
44	<	ai.set(two, false);
45	<	assertEquals(two,ai.getReference());
46	<	assertFalse(ai.isMarked());
47	<	assertEquals(two, ai.get(mark));
48	<	assertFalse(mark[0]);
49	<	ai.set(one, true);
50	<	assertEquals(one,ai.getReference());
51	<	assertTrue(ai.isMarked());
52	<	assertEquals(one, ai.get(mark));
40	>	assertSame(one, ai.getReference());
41	>	assertFalse(ai.isMarked());
42	>	assertSame(one, ai.get(mark));
43	>	assertFalse(mark[0]);
44	>	ai.set(two, false);
45	>	assertSame(two, ai.getReference());
46	>	assertFalse(ai.isMarked());
47	>	assertSame(two, ai.get(mark));
48	>	assertFalse(mark[0]);
49	>	ai.set(one, true);
50	>	assertSame(one, ai.getReference());
51	>	assertTrue(ai.isMarked());
52	>	assertSame(one, ai.get(mark));
53		assertTrue(mark[0]);
54		}
55
56	<	public void testAttemptMark(){
56	>	/**
57	>	* attemptMark succeeds in single thread
58	>	*/
59	>	public void testAttemptMark() {
60		boolean[] mark = new boolean[1];
61		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
62		assertFalse(ai.isMarked());
63		assertTrue(ai.attemptMark(one, true));
64	<	assertTrue(ai.isMarked());
65	<	assertEquals(one, ai.get(mark));
64	>	assertTrue(ai.isMarked());
65	>	assertSame(one, ai.get(mark));
66		assertTrue(mark[0]);
67		}
68
69	<	public void testCompareAndSet(){
69	>	/**
70	>	* compareAndSet succeeds in changing values if equal to expected reference
71	>	* and mark else fails
72	>	*/
73	>	public void testCompareAndSet() {
74		boolean[] mark = new boolean[1];
75		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
76	<	assertEquals(one, ai.get(mark));
76	>	assertSame(one, ai.get(mark));
77		assertFalse(ai.isMarked());
78	<	assertFalse(mark[0]);
78	>	assertFalse(mark[0]);
79
80		assertTrue(ai.compareAndSet(one, two, false, false));
81	<	assertEquals(two, ai.get(mark));
82	<	assertFalse(mark[0]);
81	>	assertSame(two, ai.get(mark));
82	>	assertFalse(mark[0]);
83
84		assertTrue(ai.compareAndSet(two, m3, false, true));
85	<	assertEquals(m3, ai.get(mark));
86	<	assertTrue(mark[0]);
85	>	assertSame(m3, ai.get(mark));
86	>	assertTrue(mark[0]);
87
88		assertFalse(ai.compareAndSet(two, m3, true, true));
89	<	assertEquals(m3, ai.get(mark));
90	<	assertTrue(mark[0]);
89	>	assertSame(m3, ai.get(mark));
90	>	assertTrue(mark[0]);
91		}
92
93	<	public void testWeakCompareAndSet(){
93	>	/**
94	>	* compareAndSet in one thread enables another waiting for reference value
95	>	* to succeed
96	>	*/
97	>	public void testCompareAndSetInMultipleThreads() throws Exception {
98	>	final AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
99	>	Thread t = new Thread(new CheckedRunnable() {
100	>	public void realRun() {
101	>	while (!ai.compareAndSet(two, three, false, false))
102	>	Thread.yield();
103	>	}});
104	>
105	>	t.start();
106	>	assertTrue(ai.compareAndSet(one, two, false, false));
107	>	t.join(LONG_DELAY_MS);
108	>	assertFalse(t.isAlive());
109	>	assertSame(three, ai.getReference());
110	>	assertFalse(ai.isMarked());
111	>	}
112	>
113	>	/**
114	>	* compareAndSet in one thread enables another waiting for mark value
115	>	* to succeed
116	>	*/
117	>	public void testCompareAndSetInMultipleThreads2() throws Exception {
118	>	final AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
119	>	Thread t = new Thread(new CheckedRunnable() {
120	>	public void realRun() {
121	>	while (!ai.compareAndSet(one, one, true, false))
122	>	Thread.yield();
123	>	}});
124	>
125	>	t.start();
126	>	assertTrue(ai.compareAndSet(one, one, false, true));
127	>	t.join(LONG_DELAY_MS);
128	>	assertFalse(t.isAlive());
129	>	assertSame(one, ai.getReference());
130	>	assertFalse(ai.isMarked());
131	>	}
132	>
133	>	/**
134	>	* repeated weakCompareAndSet succeeds in changing values when equal
135	>	* to expected
136	>	*/
137	>	public void testWeakCompareAndSet() {
138		boolean[] mark = new boolean[1];
139		AtomicMarkableReference ai = new AtomicMarkableReference(one, false);
140	<	assertEquals(one, ai.get(mark));
140	>	assertSame(one, ai.get(mark));
141		assertFalse(ai.isMarked());
142	<	assertFalse(mark[0]);
142	>	assertFalse(mark[0]);
143
144	<	while(!ai.weakCompareAndSet(one, two, false, false));
145	<	assertEquals(two, ai.get(mark));
146	<	assertFalse(mark[0]);
144	>	do {} while (!ai.weakCompareAndSet(one, two, false, false));
145	>	assertSame(two, ai.get(mark));
146	>	assertFalse(mark[0]);
147
148	<	while(!ai.weakCompareAndSet(two, m3, false, true));
149	<	assertEquals(m3, ai.get(mark));
150	<	assertTrue(mark[0]);
148	>	do {} while (!ai.weakCompareAndSet(two, m3, false, true));
149	>	assertSame(m3, ai.get(mark));
150	>	assertTrue(mark[0]);
151		}
152
153		}

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