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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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|
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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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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 |
31 |
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*/ |
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public void testConstructor() { |
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try { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
31 |
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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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} |
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catch (RuntimeException rt) {} |
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} catch (RuntimeException success) {} |
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} |
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|
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/** |
41 |
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*/ |
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public void testConstructor2() { |
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try { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "z"); |
44 |
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updaterFor("z"); |
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shouldThrow(); |
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} |
48 |
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catch (RuntimeException rt) {} |
46 |
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} catch (RuntimeException success) {} |
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} |
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|
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/** |
51 |
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*/ |
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public void testConstructor3() { |
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try { |
54 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
57 |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "w"); |
54 |
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updaterFor("w"); |
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shouldThrow(); |
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} |
61 |
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|
62 |
< |
catch (RuntimeException rt) {} |
56 |
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} catch (RuntimeException success) {} |
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} |
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|
59 |
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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; |
64 |
< |
try { |
71 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
72 |
< |
} catch (RuntimeException ok) { |
73 |
< |
return; |
74 |
< |
} |
64 |
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a = updaterFor("x"); |
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x = 1; |
66 |
< |
assertEquals(1,a.get(this)); |
67 |
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a.set(this,2); |
68 |
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assertEquals(2,a.get(this)); |
69 |
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a.set(this,-3); |
70 |
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assertEquals(-3,a.get(this)); |
66 |
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assertEquals(1, a.get(this)); |
67 |
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a.set(this, 2); |
68 |
> |
assertEquals(2, a.get(this)); |
69 |
> |
a.set(this, -3); |
70 |
> |
assertEquals(-3, a.get(this)); |
71 |
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} |
72 |
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|
73 |
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/** |
74 |
< |
* get returns the last value lazySet by same thread |
74 |
> |
* get returns the last value lazySet by same thread |
75 |
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*/ |
76 |
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public void testGetLazySet() { |
77 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
78 |
< |
try { |
79 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
80 |
< |
} catch (RuntimeException ok) { |
81 |
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return; |
82 |
< |
} |
83 |
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x = 1; |
84 |
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assertEquals(1,a.get(this)); |
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a.lazySet(this,2); |
96 |
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assertEquals(2,a.get(this)); |
97 |
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a.lazySet(this,-3); |
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assertEquals(-3,a.get(this)); |
78 |
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a = updaterFor("x"); |
79 |
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x = 1; |
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assertEquals(1, a.get(this)); |
81 |
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a.lazySet(this, 2); |
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assertEquals(2, a.get(this)); |
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a.lazySet(this, -3); |
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assertEquals(-3, a.get(this)); |
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} |
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|
101 |
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|
87 |
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/** |
88 |
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* compareAndSet succeeds in changing value if equal to expected else fails |
89 |
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*/ |
90 |
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public void testCompareAndSet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
92 |
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try { |
93 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
94 |
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} catch (RuntimeException ok) { |
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return; |
96 |
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} |
97 |
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x = 1; |
98 |
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assertTrue(a.compareAndSet(this,1,2)); |
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assertTrue(a.compareAndSet(this,2,-4)); |
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assertEquals(-4,a.get(this)); |
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assertFalse(a.compareAndSet(this,-5,7)); |
117 |
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assertFalse((7 == a.get(this))); |
118 |
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assertTrue(a.compareAndSet(this,-4,7)); |
119 |
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assertEquals(7,a.get(this)); |
92 |
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a = updaterFor("x"); |
93 |
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x = 1; |
94 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
95 |
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assertTrue(a.compareAndSet(this, 2, -4)); |
96 |
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assertEquals(-4, a.get(this)); |
97 |
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assertFalse(a.compareAndSet(this, -5, 7)); |
98 |
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assertEquals(-4, a.get(this)); |
99 |
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assertTrue(a.compareAndSet(this, -4, 7)); |
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assertEquals(7, a.get(this)); |
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} |
102 |
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|
122 |
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|
103 |
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/** |
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* compareAndSet in one thread enables another waiting for value |
105 |
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* to succeed |
106 |
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*/ |
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public void testCompareAndSetInMultipleThreads() throws Exception { |
108 |
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x = 1; |
109 |
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final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a; |
110 |
< |
try { |
111 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
112 |
< |
} catch (RuntimeException ok) { |
113 |
< |
return; |
114 |
< |
} |
115 |
< |
|
116 |
< |
Thread t = new Thread(new Runnable() { |
137 |
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public void run() { |
138 |
< |
while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield(); |
139 |
< |
}}); |
109 |
> |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
110 |
> |
a = updaterFor("x"); |
111 |
> |
|
112 |
> |
Thread t = new Thread(new CheckedRunnable() { |
113 |
> |
public void realRun() { |
114 |
> |
while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) |
115 |
> |
Thread.yield(); |
116 |
> |
}}); |
117 |
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|
118 |
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t.start(); |
119 |
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assertTrue(a.compareAndSet(this, 1, 2)); |
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t.join(LONG_DELAY_MS); |
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assertFalse(t.isAlive()); |
122 |
< |
assertEquals(a.get(this), 3); |
122 |
> |
assertEquals(3, a.get(this)); |
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} |
124 |
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|
125 |
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/** |
128 |
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*/ |
129 |
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public void testWeakCompareAndSet() { |
130 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
131 |
< |
try { |
155 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
156 |
< |
} catch (RuntimeException ok) { |
157 |
< |
return; |
158 |
< |
} |
131 |
> |
a = updaterFor("x"); |
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x = 1; |
133 |
< |
while (!a.weakCompareAndSet(this,1,2)); |
134 |
< |
while (!a.weakCompareAndSet(this,2,-4)); |
135 |
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assertEquals(-4,a.get(this)); |
136 |
< |
while (!a.weakCompareAndSet(this,-4,7)); |
137 |
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assertEquals(7,a.get(this)); |
133 |
> |
while (!a.weakCompareAndSet(this, 1, 2)); |
134 |
> |
while (!a.weakCompareAndSet(this, 2, -4)); |
135 |
> |
assertEquals(-4, a.get(this)); |
136 |
> |
while (!a.weakCompareAndSet(this, -4, 7)); |
137 |
> |
assertEquals(7, a.get(this)); |
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} |
139 |
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|
140 |
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/** |
141 |
< |
* getAndSet returns previous value and sets to given value |
141 |
> |
* getAndSet returns previous value and sets to given value |
142 |
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*/ |
143 |
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public void testGetAndSet() { |
144 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
145 |
< |
try { |
146 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
147 |
< |
} catch (RuntimeException ok) { |
148 |
< |
return; |
149 |
< |
} |
177 |
< |
x = 1; |
178 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
179 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
180 |
< |
assertEquals(-10,a.getAndSet(this,1)); |
145 |
> |
a = updaterFor("x"); |
146 |
> |
x = 1; |
147 |
> |
assertEquals(1, a.getAndSet(this, 0)); |
148 |
> |
assertEquals(0, a.getAndSet(this, -10)); |
149 |
> |
assertEquals(-10, a.getAndSet(this, 1)); |
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} |
151 |
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|
152 |
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/** |
154 |
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*/ |
155 |
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public void testGetAndAdd() { |
156 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
157 |
< |
try { |
158 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
159 |
< |
} catch (RuntimeException ok) { |
160 |
< |
return; |
161 |
< |
} |
162 |
< |
x = 1; |
194 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
195 |
< |
assertEquals(3,a.get(this)); |
196 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
197 |
< |
assertEquals(-1,a.get(this)); |
157 |
> |
a = updaterFor("x"); |
158 |
> |
x = 1; |
159 |
> |
assertEquals(1, a.getAndAdd(this, 2)); |
160 |
> |
assertEquals(3, a.get(this)); |
161 |
> |
assertEquals(3, a.getAndAdd(this, -4)); |
162 |
> |
assertEquals(-1, a.get(this)); |
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} |
164 |
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|
165 |
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/** |
167 |
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*/ |
168 |
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public void testGetAndDecrement() { |
169 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
170 |
< |
try { |
171 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
172 |
< |
} catch (RuntimeException ok) { |
173 |
< |
return; |
174 |
< |
} |
210 |
< |
x = 1; |
211 |
< |
assertEquals(1,a.getAndDecrement(this)); |
212 |
< |
assertEquals(0,a.getAndDecrement(this)); |
213 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
170 |
> |
a = updaterFor("x"); |
171 |
> |
x = 1; |
172 |
> |
assertEquals(1, a.getAndDecrement(this)); |
173 |
> |
assertEquals(0, a.getAndDecrement(this)); |
174 |
> |
assertEquals(-1, a.getAndDecrement(this)); |
175 |
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} |
176 |
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|
177 |
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/** |
179 |
|
*/ |
180 |
|
public void testGetAndIncrement() { |
181 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
182 |
< |
try { |
183 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
184 |
< |
} catch (RuntimeException ok) { |
185 |
< |
return; |
186 |
< |
} |
187 |
< |
x = 1; |
188 |
< |
assertEquals(1,a.getAndIncrement(this)); |
189 |
< |
assertEquals(2,a.get(this)); |
190 |
< |
a.set(this,-2); |
230 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
231 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
232 |
< |
assertEquals(0,a.getAndIncrement(this)); |
233 |
< |
assertEquals(1,a.get(this)); |
182 |
> |
a = updaterFor("x"); |
183 |
> |
x = 1; |
184 |
> |
assertEquals(1, a.getAndIncrement(this)); |
185 |
> |
assertEquals(2, a.get(this)); |
186 |
> |
a.set(this, -2); |
187 |
> |
assertEquals(-2, a.getAndIncrement(this)); |
188 |
> |
assertEquals(-1, a.getAndIncrement(this)); |
189 |
> |
assertEquals(0, a.getAndIncrement(this)); |
190 |
> |
assertEquals(1, a.get(this)); |
191 |
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} |
192 |
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|
193 |
|
/** |
195 |
|
*/ |
196 |
|
public void testAddAndGet() { |
197 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
198 |
< |
try { |
242 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
243 |
< |
} catch (RuntimeException ok) { |
244 |
< |
return; |
245 |
< |
} |
198 |
> |
a = updaterFor("x"); |
199 |
|
x = 1; |
200 |
< |
assertEquals(3,a.addAndGet(this,2)); |
201 |
< |
assertEquals(3,a.get(this)); |
202 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
203 |
< |
assertEquals(-1,a.get(this)); |
200 |
> |
assertEquals(3, a.addAndGet(this, 2)); |
201 |
> |
assertEquals(3, a.get(this)); |
202 |
> |
assertEquals(-1, a.addAndGet(this, -4)); |
203 |
> |
assertEquals(-1, a.get(this)); |
204 |
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} |
205 |
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|
206 |
|
/** |
207 |
< |
* decrementAndGet decrements and returns current value |
207 |
> |
* decrementAndGet decrements and returns current value |
208 |
|
*/ |
209 |
|
public void testDecrementAndGet() { |
210 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
211 |
< |
try { |
212 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
213 |
< |
} catch (RuntimeException ok) { |
214 |
< |
return; |
215 |
< |
} |
216 |
< |
x = 1; |
264 |
< |
assertEquals(0,a.decrementAndGet(this)); |
265 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
266 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
267 |
< |
assertEquals(-2,a.get(this)); |
211 |
> |
a = updaterFor("x"); |
212 |
> |
x = 1; |
213 |
> |
assertEquals(0, a.decrementAndGet(this)); |
214 |
> |
assertEquals(-1, a.decrementAndGet(this)); |
215 |
> |
assertEquals(-2, a.decrementAndGet(this)); |
216 |
> |
assertEquals(-2, a.get(this)); |
217 |
|
} |
218 |
|
|
219 |
|
/** |
221 |
|
*/ |
222 |
|
public void testIncrementAndGet() { |
223 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
224 |
< |
try { |
225 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
226 |
< |
} catch (RuntimeException ok) { |
227 |
< |
return; |
228 |
< |
} |
229 |
< |
x = 1; |
230 |
< |
assertEquals(2,a.incrementAndGet(this)); |
231 |
< |
assertEquals(2,a.get(this)); |
232 |
< |
a.set(this,-2); |
284 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
285 |
< |
assertEquals(0,a.incrementAndGet(this)); |
286 |
< |
assertEquals(1,a.incrementAndGet(this)); |
287 |
< |
assertEquals(1,a.get(this)); |
224 |
> |
a = updaterFor("x"); |
225 |
> |
x = 1; |
226 |
> |
assertEquals(2, a.incrementAndGet(this)); |
227 |
> |
assertEquals(2, a.get(this)); |
228 |
> |
a.set(this, -2); |
229 |
> |
assertEquals(-1, a.incrementAndGet(this)); |
230 |
> |
assertEquals(0, a.incrementAndGet(this)); |
231 |
> |
assertEquals(1, a.incrementAndGet(this)); |
232 |
> |
assertEquals(1, a.get(this)); |
233 |
|
} |
234 |
|
|
235 |
|
} |