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* Pat Fisher, Mike Judd. |
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*/ |
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– |
import junit.framework.*; |
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import java.util.concurrent.atomic.AtomicReferenceFieldUpdater; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase { |
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volatile Integer x = null; |
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Object z; |
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Integer w; |
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volatile int i; |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicReferenceFieldUpdaterTest.class); |
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} |
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|
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) { |
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return AtomicReferenceFieldUpdater.newUpdater |
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(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName); |
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} |
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|
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/** |
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* Construction with non-existent field throws RuntimeException |
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*/ |
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public void testConstructor() { |
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try { |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> |
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a = AtomicReferenceFieldUpdater.newUpdater |
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(AtomicReferenceFieldUpdaterTest.class, Integer.class, "y"); |
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updaterFor("y"); |
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shouldThrow(); |
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} catch (RuntimeException success) {} |
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} catch (RuntimeException success) { |
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assertNotNull(success.getCause()); |
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} |
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} |
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|
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/** |
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* construction with field not of given type throws RuntimeException |
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* construction with field not of given type throws ClassCastException |
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*/ |
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public void testConstructor2() { |
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try { |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> |
42 |
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a = AtomicReferenceFieldUpdater.newUpdater |
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(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z"); |
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updaterFor("z"); |
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shouldThrow(); |
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} catch (RuntimeException success) {} |
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} catch (ClassCastException success) {} |
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} |
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|
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/** |
55 |
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* Constructor with non-volatile field throws exception |
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* Constructor with non-volatile field throws IllegalArgumentException |
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*/ |
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public void testConstructor3() { |
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try { |
59 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> |
54 |
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a = AtomicReferenceFieldUpdater.newUpdater |
55 |
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(AtomicReferenceFieldUpdaterTest.class, Integer.class, "w"); |
59 |
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updaterFor("w"); |
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shouldThrow(); |
61 |
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} catch (RuntimeException success) {} |
61 |
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} catch (IllegalArgumentException success) {} |
62 |
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} |
63 |
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|
64 |
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/** |
65 |
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* Constructor with non-reference field throws ClassCastException |
66 |
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*/ |
67 |
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public void testConstructor4() { |
68 |
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try { |
69 |
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updaterFor("i"); |
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shouldThrow(); |
71 |
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} catch (ClassCastException success) {} |
72 |
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} |
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|
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/** |
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* get returns the last value set or assigned |
76 |
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*/ |
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public void testGetSet() { |
78 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
79 |
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try { |
66 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
67 |
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} catch (RuntimeException ok) { |
68 |
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return; |
69 |
< |
} |
78 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
79 |
> |
a = updaterFor("x"); |
80 |
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x = one; |
81 |
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assertSame(one, a.get(this)); |
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a.set(this, two); |
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* get returns the last value lazySet by same thread |
90 |
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*/ |
91 |
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public void testGetLazySet() { |
92 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
93 |
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try { |
84 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
85 |
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} catch (RuntimeException ok) { |
86 |
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return; |
87 |
< |
} |
92 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
93 |
> |
a = updaterFor("x"); |
94 |
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x = one; |
95 |
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assertSame(one, a.get(this)); |
96 |
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a.lazySet(this, two); |
103 |
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* compareAndSet succeeds in changing value if equal to expected else fails |
104 |
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*/ |
105 |
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public void testCompareAndSet() { |
106 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
107 |
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try { |
102 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
103 |
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} catch (RuntimeException ok) { |
104 |
< |
return; |
105 |
< |
} |
106 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
107 |
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a = updaterFor("x"); |
108 |
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x = one; |
109 |
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assertTrue(a.compareAndSet(this, one, two)); |
110 |
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assertTrue(a.compareAndSet(this, two, m4)); |
121 |
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*/ |
122 |
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public void testCompareAndSetInMultipleThreads() throws Exception { |
123 |
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x = one; |
124 |
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final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
125 |
< |
try { |
124 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
125 |
< |
} catch (RuntimeException ok) { |
126 |
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return; |
127 |
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} |
124 |
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final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
125 |
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a = updaterFor("x"); |
126 |
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|
127 |
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Thread t = new Thread(new CheckedRunnable() { |
128 |
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public void realRun() { |
134 |
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assertTrue(a.compareAndSet(this, one, two)); |
135 |
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t.join(LONG_DELAY_MS); |
136 |
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assertFalse(t.isAlive()); |
137 |
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assertSame(a.get(this), three); |
137 |
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assertSame(three, a.get(this)); |
138 |
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} |
139 |
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|
140 |
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/** |
142 |
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* to expected |
143 |
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*/ |
144 |
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public void testWeakCompareAndSet() { |
145 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
146 |
< |
try { |
149 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
150 |
< |
} catch (RuntimeException ok) { |
151 |
< |
return; |
152 |
< |
} |
145 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
146 |
> |
a = updaterFor("x"); |
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x = one; |
148 |
< |
while (!a.weakCompareAndSet(this, one, two)); |
149 |
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while (!a.weakCompareAndSet(this, two, m4)); |
148 |
> |
do {} while (!a.weakCompareAndSet(this, one, two)); |
149 |
> |
do {} while (!a.weakCompareAndSet(this, two, m4)); |
150 |
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assertSame(m4, a.get(this)); |
151 |
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while (!a.weakCompareAndSet(this, m4, seven)); |
151 |
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do {} while (!a.weakCompareAndSet(this, m4, seven)); |
152 |
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assertSame(seven, a.get(this)); |
153 |
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} |
154 |
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|
156 |
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* getAndSet returns previous value and sets to given value |
157 |
|
*/ |
158 |
|
public void testGetAndSet() { |
159 |
< |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
160 |
< |
try { |
167 |
< |
a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
168 |
< |
} catch (RuntimeException ok) { |
169 |
< |
return; |
170 |
< |
} |
159 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a; |
160 |
> |
a = updaterFor("x"); |
161 |
|
x = one; |
162 |
|
assertSame(one, a.getAndSet(this, zero)); |
163 |
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assertSame(zero, a.getAndSet(this, m10)); |