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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import java.util.concurrent.atomic.*; |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.atomic.AtomicLongFieldUpdater; |
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|
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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 AtomicLongFieldUpdaterTest extends JSR166TestCase { |
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volatile long x = 0; |
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return new TestSuite(AtomicLongFieldUpdaterTest.class); |
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} |
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|
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) { |
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return AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.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 |
33 |
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*/ |
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public void testConstructor() { |
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try { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "y"); |
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updaterFor("y"); |
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shouldThrow(); |
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} catch (RuntimeException success) { |
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assertNotNull(success.getCause()); |
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} |
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catch (RuntimeException rt) {} |
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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 IllegalArgumentException |
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*/ |
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public void testConstructor2() { |
47 |
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try { |
48 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "z"); |
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updaterFor("z"); |
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shouldThrow(); |
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} |
48 |
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catch (RuntimeException rt) {} |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* construction with non-volatile field throws RuntimeException |
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* construction with non-volatile field throws IllegalArgumentException |
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*/ |
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public void testConstructor3() { |
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try { |
58 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "w"); |
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updaterFor("w"); |
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shouldThrow(); |
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} |
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|
62 |
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catch (RuntimeException rt) {} |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* get returns the last value set or assigned |
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* get returns the last value set or assigned |
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*/ |
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public void testGetSet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
68 |
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try { |
71 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
72 |
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} catch (RuntimeException ok) { |
73 |
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return; |
74 |
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} |
68 |
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a = updaterFor("x"); |
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x = 1; |
70 |
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assertEquals(1,a.get(this)); |
71 |
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a.set(this,2); |
72 |
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assertEquals(2,a.get(this)); |
73 |
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a.set(this,-3); |
74 |
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assertEquals(-3,a.get(this)); |
70 |
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assertEquals(1, a.get(this)); |
71 |
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a.set(this, 2); |
72 |
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assertEquals(2, a.get(this)); |
73 |
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a.set(this, -3); |
74 |
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assertEquals(-3, a.get(this)); |
75 |
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} |
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|
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/** |
78 |
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* get returns the last value lazySet by same thread |
78 |
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* get returns the last value lazySet by same thread |
79 |
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*/ |
80 |
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public void testGetLazySet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
82 |
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try { |
89 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
90 |
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} catch (RuntimeException ok) { |
91 |
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return; |
92 |
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} |
82 |
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a = updaterFor("x"); |
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x = 1; |
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assertEquals(1,a.get(this)); |
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a.lazySet(this,2); |
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assertEquals(2,a.get(this)); |
87 |
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a.lazySet(this,-3); |
88 |
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assertEquals(-3,a.get(this)); |
84 |
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assertEquals(1, a.get(this)); |
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a.lazySet(this, 2); |
86 |
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assertEquals(2, a.get(this)); |
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a.lazySet(this, -3); |
88 |
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assertEquals(-3, a.get(this)); |
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} |
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|
101 |
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|
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/** |
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* compareAndSet succeeds in changing value if equal to expected else fails |
93 |
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*/ |
94 |
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public void testCompareAndSet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
96 |
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try { |
108 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
109 |
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} catch (RuntimeException ok) { |
110 |
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return; |
111 |
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} |
96 |
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a = updaterFor("x"); |
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x = 1; |
98 |
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assertTrue(a.compareAndSet(this,1,2)); |
99 |
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assertTrue(a.compareAndSet(this,2,-4)); |
100 |
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assertEquals(-4,a.get(this)); |
101 |
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assertFalse(a.compareAndSet(this,-5,7)); |
102 |
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assertFalse((7 == a.get(this))); |
103 |
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assertTrue(a.compareAndSet(this,-4,7)); |
104 |
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assertEquals(7,a.get(this)); |
98 |
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assertTrue(a.compareAndSet(this, 1, 2)); |
99 |
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assertTrue(a.compareAndSet(this, 2, -4)); |
100 |
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assertEquals(-4, a.get(this)); |
101 |
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assertFalse(a.compareAndSet(this, -5, 7)); |
102 |
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assertEquals(-4, a.get(this)); |
103 |
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assertTrue(a.compareAndSet(this, -4, 7)); |
104 |
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assertEquals(7, a.get(this)); |
105 |
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} |
106 |
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|
122 |
– |
|
107 |
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/** |
108 |
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* compareAndSet in one thread enables another waiting for value |
109 |
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* to succeed |
110 |
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*/ |
111 |
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public void testCompareAndSetInMultipleThreads() throws Exception { |
112 |
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x = 1; |
113 |
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final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a; |
114 |
< |
try { |
131 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
132 |
< |
} catch (RuntimeException ok) { |
133 |
< |
return; |
134 |
< |
} |
113 |
> |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
114 |
> |
a = updaterFor("x"); |
115 |
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|
116 |
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Thread t = new Thread(new CheckedRunnable() { |
117 |
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public void realRun() { |
123 |
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assertTrue(a.compareAndSet(this, 1, 2)); |
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t.join(LONG_DELAY_MS); |
125 |
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assertFalse(t.isAlive()); |
126 |
< |
assertEquals(a.get(this), 3); |
126 |
> |
assertEquals(3, a.get(this)); |
127 |
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} |
128 |
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|
129 |
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/** |
132 |
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*/ |
133 |
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public void testWeakCompareAndSet() { |
134 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
135 |
< |
try { |
156 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
157 |
< |
} catch (RuntimeException ok) { |
158 |
< |
return; |
159 |
< |
} |
135 |
> |
a = updaterFor("x"); |
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x = 1; |
137 |
< |
while (!a.weakCompareAndSet(this,1,2)); |
138 |
< |
while (!a.weakCompareAndSet(this,2,-4)); |
139 |
< |
assertEquals(-4,a.get(this)); |
140 |
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while (!a.weakCompareAndSet(this,-4,7)); |
141 |
< |
assertEquals(7,a.get(this)); |
137 |
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do {} while (!a.weakCompareAndSet(this, 1, 2)); |
138 |
> |
do {} while (!a.weakCompareAndSet(this, 2, -4)); |
139 |
> |
assertEquals(-4, a.get(this)); |
140 |
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do {} while (!a.weakCompareAndSet(this, -4, 7)); |
141 |
> |
assertEquals(7, a.get(this)); |
142 |
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} |
143 |
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|
144 |
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/** |
145 |
< |
* getAndSet returns previous value and sets to given value |
145 |
> |
* getAndSet returns previous value and sets to given value |
146 |
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*/ |
147 |
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public void testGetAndSet() { |
148 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
149 |
< |
try { |
174 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
175 |
< |
} catch (RuntimeException ok) { |
176 |
< |
return; |
177 |
< |
} |
149 |
> |
a = updaterFor("x"); |
150 |
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x = 1; |
151 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
152 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
153 |
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assertEquals(-10,a.getAndSet(this,1)); |
151 |
> |
assertEquals(1, a.getAndSet(this, 0)); |
152 |
> |
assertEquals(0, a.getAndSet(this, -10)); |
153 |
> |
assertEquals(-10, a.getAndSet(this, 1)); |
154 |
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} |
155 |
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|
156 |
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/** |
158 |
|
*/ |
159 |
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public void testGetAndAdd() { |
160 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
161 |
< |
try { |
190 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
191 |
< |
} catch (RuntimeException ok) { |
192 |
< |
return; |
193 |
< |
} |
161 |
> |
a = updaterFor("x"); |
162 |
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x = 1; |
163 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
164 |
< |
assertEquals(3,a.get(this)); |
165 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
166 |
< |
assertEquals(-1,a.get(this)); |
163 |
> |
assertEquals(1, a.getAndAdd(this, 2)); |
164 |
> |
assertEquals(3, a.get(this)); |
165 |
> |
assertEquals(3, a.getAndAdd(this, -4)); |
166 |
> |
assertEquals(-1, a.get(this)); |
167 |
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} |
168 |
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|
169 |
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/** |
171 |
|
*/ |
172 |
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public void testGetAndDecrement() { |
173 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
174 |
< |
try { |
207 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
208 |
< |
} catch (RuntimeException ok) { |
209 |
< |
return; |
210 |
< |
} |
174 |
> |
a = updaterFor("x"); |
175 |
|
x = 1; |
176 |
< |
assertEquals(1,a.getAndDecrement(this)); |
177 |
< |
assertEquals(0,a.getAndDecrement(this)); |
178 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
176 |
> |
assertEquals(1, a.getAndDecrement(this)); |
177 |
> |
assertEquals(0, a.getAndDecrement(this)); |
178 |
> |
assertEquals(-1, a.getAndDecrement(this)); |
179 |
|
} |
180 |
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|
181 |
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/** |
183 |
|
*/ |
184 |
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public void testGetAndIncrement() { |
185 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
186 |
< |
try { |
223 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
224 |
< |
} catch (RuntimeException ok) { |
225 |
< |
return; |
226 |
< |
} |
186 |
> |
a = updaterFor("x"); |
187 |
|
x = 1; |
188 |
< |
assertEquals(1,a.getAndIncrement(this)); |
189 |
< |
assertEquals(2,a.get(this)); |
190 |
< |
a.set(this,-2); |
191 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
192 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
193 |
< |
assertEquals(0,a.getAndIncrement(this)); |
194 |
< |
assertEquals(1,a.get(this)); |
188 |
> |
assertEquals(1, a.getAndIncrement(this)); |
189 |
> |
assertEquals(2, a.get(this)); |
190 |
> |
a.set(this, -2); |
191 |
> |
assertEquals(-2, a.getAndIncrement(this)); |
192 |
> |
assertEquals(-1, a.getAndIncrement(this)); |
193 |
> |
assertEquals(0, a.getAndIncrement(this)); |
194 |
> |
assertEquals(1, a.get(this)); |
195 |
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} |
196 |
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|
197 |
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/** |
199 |
|
*/ |
200 |
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public void testAddAndGet() { |
201 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
202 |
< |
try { |
243 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
244 |
< |
} catch (RuntimeException ok) { |
245 |
< |
return; |
246 |
< |
} |
202 |
> |
a = updaterFor("x"); |
203 |
|
x = 1; |
204 |
< |
assertEquals(3,a.addAndGet(this,2)); |
205 |
< |
assertEquals(3,a.get(this)); |
206 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
207 |
< |
assertEquals(-1,a.get(this)); |
204 |
> |
assertEquals(3, a.addAndGet(this, 2)); |
205 |
> |
assertEquals(3, a.get(this)); |
206 |
> |
assertEquals(-1, a.addAndGet(this, -4)); |
207 |
> |
assertEquals(-1, a.get(this)); |
208 |
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} |
209 |
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|
210 |
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/** |
211 |
< |
* decrementAndGet decrements and returns current value |
211 |
> |
* decrementAndGet decrements and returns current value |
212 |
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*/ |
213 |
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public void testDecrementAndGet() { |
214 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
215 |
< |
try { |
260 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
261 |
< |
} catch (RuntimeException ok) { |
262 |
< |
return; |
263 |
< |
} |
215 |
> |
a = updaterFor("x"); |
216 |
|
x = 1; |
217 |
< |
assertEquals(0,a.decrementAndGet(this)); |
218 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
219 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
220 |
< |
assertEquals(-2,a.get(this)); |
217 |
> |
assertEquals(0, a.decrementAndGet(this)); |
218 |
> |
assertEquals(-1, a.decrementAndGet(this)); |
219 |
> |
assertEquals(-2, a.decrementAndGet(this)); |
220 |
> |
assertEquals(-2, a.get(this)); |
221 |
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} |
222 |
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|
223 |
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/** |
225 |
|
*/ |
226 |
|
public void testIncrementAndGet() { |
227 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
228 |
< |
try { |
277 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
278 |
< |
} catch (RuntimeException ok) { |
279 |
< |
return; |
280 |
< |
} |
228 |
> |
a = updaterFor("x"); |
229 |
|
x = 1; |
230 |
< |
assertEquals(2,a.incrementAndGet(this)); |
231 |
< |
assertEquals(2,a.get(this)); |
232 |
< |
a.set(this,-2); |
233 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
234 |
< |
assertEquals(0,a.incrementAndGet(this)); |
235 |
< |
assertEquals(1,a.incrementAndGet(this)); |
236 |
< |
assertEquals(1,a.get(this)); |
230 |
> |
assertEquals(2, a.incrementAndGet(this)); |
231 |
> |
assertEquals(2, a.get(this)); |
232 |
> |
a.set(this, -2); |
233 |
> |
assertEquals(-1, a.incrementAndGet(this)); |
234 |
> |
assertEquals(0, a.incrementAndGet(this)); |
235 |
> |
assertEquals(1, a.incrementAndGet(this)); |
236 |
> |
assertEquals(1, a.get(this)); |
237 |
|
} |
238 |
|
|
239 |
|
} |