9 |
|
import junit.framework.*; |
10 |
|
import java.util.concurrent.atomic.*; |
11 |
|
|
12 |
< |
public class AtomicMarkableReferenceTest extends JSR166TestCase{ |
13 |
< |
public static void main (String[] args) { |
14 |
< |
junit.textui.TestRunner.run (suite()); |
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 |
|
} |
19 |
|
|
20 |
|
/** |
21 |
< |
* constructor initializes to given reference and mark |
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()); |
25 |
> |
assertSame(one,ai.getReference()); |
26 |
> |
assertFalse(ai.isMarked()); |
27 |
|
AtomicMarkableReference a2 = new AtomicMarkableReference(null, true); |
28 |
< |
assertNull(a2.getReference()); |
29 |
< |
assertTrue(a2.isMarked()); |
30 |
< |
|
28 |
> |
assertNull(a2.getReference()); |
29 |
> |
assertTrue(a2.isMarked()); |
30 |
|
} |
31 |
|
|
32 |
|
/** |
33 |
< |
* get returns the last values of reference and mark set |
33 |
> |
* get returns the last values of reference and mark set |
34 |
|
*/ |
35 |
< |
public void testGetSet(){ |
35 |
> |
public void testGetSet() { |
36 |
|
boolean[] mark = new boolean[1]; |
37 |
|
AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
38 |
< |
assertEquals(one,ai.getReference()); |
39 |
< |
assertFalse(ai.isMarked()); |
40 |
< |
assertEquals(one, ai.get(mark)); |
41 |
< |
assertFalse(mark[0]); |
42 |
< |
ai.set(two, false); |
43 |
< |
assertEquals(two,ai.getReference()); |
44 |
< |
assertFalse(ai.isMarked()); |
45 |
< |
assertEquals(two, ai.get(mark)); |
46 |
< |
assertFalse(mark[0]); |
47 |
< |
ai.set(one, true); |
48 |
< |
assertEquals(one,ai.getReference()); |
49 |
< |
assertTrue(ai.isMarked()); |
50 |
< |
assertEquals(one, ai.get(mark)); |
38 |
> |
assertSame(one,ai.getReference()); |
39 |
> |
assertFalse(ai.isMarked()); |
40 |
> |
assertSame(one, ai.get(mark)); |
41 |
> |
assertFalse(mark[0]); |
42 |
> |
ai.set(two, false); |
43 |
> |
assertSame(two,ai.getReference()); |
44 |
> |
assertFalse(ai.isMarked()); |
45 |
> |
assertSame(two, ai.get(mark)); |
46 |
> |
assertFalse(mark[0]); |
47 |
> |
ai.set(one, true); |
48 |
> |
assertSame(one,ai.getReference()); |
49 |
> |
assertTrue(ai.isMarked()); |
50 |
> |
assertSame(one, ai.get(mark)); |
51 |
|
assertTrue(mark[0]); |
52 |
|
} |
53 |
|
|
54 |
|
/** |
55 |
|
* attemptMark succeeds in single thread |
56 |
|
*/ |
57 |
< |
public void testAttemptMark(){ |
57 |
> |
public void testAttemptMark() { |
58 |
|
boolean[] mark = new boolean[1]; |
59 |
|
AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
60 |
|
assertFalse(ai.isMarked()); |
61 |
|
assertTrue(ai.attemptMark(one, true)); |
62 |
< |
assertTrue(ai.isMarked()); |
63 |
< |
assertEquals(one, ai.get(mark)); |
62 |
> |
assertTrue(ai.isMarked()); |
63 |
> |
assertSame(one, ai.get(mark)); |
64 |
|
assertTrue(mark[0]); |
65 |
|
} |
66 |
|
|
68 |
|
* compareAndSet succeeds in changing values if equal to expected reference |
69 |
|
* and mark else fails |
70 |
|
*/ |
71 |
< |
public void testCompareAndSet(){ |
71 |
> |
public void testCompareAndSet() { |
72 |
|
boolean[] mark = new boolean[1]; |
73 |
|
AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
74 |
< |
assertEquals(one, ai.get(mark)); |
74 |
> |
assertSame(one, ai.get(mark)); |
75 |
|
assertFalse(ai.isMarked()); |
76 |
< |
assertFalse(mark[0]); |
76 |
> |
assertFalse(mark[0]); |
77 |
|
|
78 |
|
assertTrue(ai.compareAndSet(one, two, false, false)); |
79 |
< |
assertEquals(two, ai.get(mark)); |
80 |
< |
assertFalse(mark[0]); |
79 |
> |
assertSame(two, ai.get(mark)); |
80 |
> |
assertFalse(mark[0]); |
81 |
|
|
82 |
|
assertTrue(ai.compareAndSet(two, m3, false, true)); |
83 |
< |
assertEquals(m3, ai.get(mark)); |
84 |
< |
assertTrue(mark[0]); |
83 |
> |
assertSame(m3, ai.get(mark)); |
84 |
> |
assertTrue(mark[0]); |
85 |
|
|
86 |
|
assertFalse(ai.compareAndSet(two, m3, true, true)); |
87 |
< |
assertEquals(m3, ai.get(mark)); |
88 |
< |
assertTrue(mark[0]); |
87 |
> |
assertSame(m3, ai.get(mark)); |
88 |
> |
assertTrue(mark[0]); |
89 |
|
} |
90 |
|
|
91 |
|
/** |
92 |
|
* compareAndSet in one thread enables another waiting for reference value |
93 |
|
* to succeed |
94 |
|
*/ |
95 |
< |
public void testCompareAndSetInMultipleThreads() { |
95 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
96 |
|
final AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
97 |
< |
Thread t = new Thread(new Runnable() { |
98 |
< |
public void run() { |
99 |
< |
while(!ai.compareAndSet(two, three, false, false)) Thread.yield(); |
100 |
< |
}}); |
101 |
< |
try { |
102 |
< |
t.start(); |
103 |
< |
assertTrue(ai.compareAndSet(one, two, false, false)); |
104 |
< |
t.join(LONG_DELAY_MS); |
105 |
< |
assertFalse(t.isAlive()); |
106 |
< |
assertEquals(ai.getReference(), three); |
107 |
< |
assertFalse(ai.isMarked()); |
108 |
< |
} |
110 |
< |
catch(Exception e) { |
111 |
< |
unexpectedException(); |
112 |
< |
} |
97 |
> |
Thread t = new Thread(new CheckedRunnable() { |
98 |
> |
public void realRun() { |
99 |
> |
while (!ai.compareAndSet(two, three, false, false)) |
100 |
> |
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 |
> |
assertSame(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() { |
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 |
< |
try { |
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 |
< |
} |
133 |
< |
catch(Exception e) { |
134 |
< |
unexpectedException(); |
135 |
< |
} |
117 |
> |
Thread t = new Thread(new CheckedRunnable() { |
118 |
> |
public void realRun() { |
119 |
> |
while (!ai.compareAndSet(one, one, true, false)) |
120 |
> |
Thread.yield(); |
121 |
> |
}}); |
122 |
> |
|
123 |
> |
t.start(); |
124 |
> |
assertTrue(ai.compareAndSet(one, one, false, true)); |
125 |
> |
t.join(LONG_DELAY_MS); |
126 |
> |
assertFalse(t.isAlive()); |
127 |
> |
assertSame(ai.getReference(), one); |
128 |
> |
assertFalse(ai.isMarked()); |
129 |
|
} |
130 |
|
|
131 |
|
/** |
132 |
|
* repeated weakCompareAndSet succeeds in changing values when equal |
133 |
|
* to expected |
134 |
|
*/ |
135 |
< |
public void testWeakCompareAndSet(){ |
135 |
> |
public void testWeakCompareAndSet() { |
136 |
|
boolean[] mark = new boolean[1]; |
137 |
|
AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
138 |
< |
assertEquals(one, ai.get(mark)); |
138 |
> |
assertSame(one, ai.get(mark)); |
139 |
|
assertFalse(ai.isMarked()); |
140 |
< |
assertFalse(mark[0]); |
140 |
> |
assertFalse(mark[0]); |
141 |
|
|
142 |
< |
while(!ai.weakCompareAndSet(one, two, false, false)); |
143 |
< |
assertEquals(two, ai.get(mark)); |
144 |
< |
assertFalse(mark[0]); |
142 |
> |
while (!ai.weakCompareAndSet(one, two, false, false)); |
143 |
> |
assertSame(two, ai.get(mark)); |
144 |
> |
assertFalse(mark[0]); |
145 |
|
|
146 |
< |
while(!ai.weakCompareAndSet(two, m3, false, true)); |
147 |
< |
assertEquals(m3, ai.get(mark)); |
148 |
< |
assertTrue(mark[0]); |
146 |
> |
while (!ai.weakCompareAndSet(two, m3, false, true)); |
147 |
> |
assertSame(m3, ai.get(mark)); |
148 |
> |
assertTrue(mark[0]); |
149 |
|
} |
150 |
|
|
151 |
|
} |