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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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public class AtomicLongFieldUpdaterTest extends JSR166TestCase { |
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volatile long x = 0; |
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int z; |
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long w; |
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|
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< |
public static void main(String[] args){ |
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> |
public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicLongFieldUpdaterTest.class); |
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} |
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|
24 |
+ |
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 |
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*/ |
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public void testConstructor(){ |
32 |
> |
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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} |
35 |
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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 |
42 |
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* construction with field not of given type throws IllegalArgumentException |
43 |
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*/ |
44 |
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public void testConstructor2(){ |
44 |
> |
public void testConstructor2() { |
45 |
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try { |
46 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
44 |
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a = AtomicLongFieldUpdater.newUpdater |
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(AtomicLongFieldUpdaterTest.class, "z"); |
46 |
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updaterFor("z"); |
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shouldThrow(); |
48 |
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} |
48 |
< |
catch (RuntimeException rt) {} |
48 |
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} catch (IllegalArgumentException success) {} |
49 |
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} |
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|
51 |
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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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public void testConstructor3() { |
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try { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
57 |
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a = AtomicLongFieldUpdater.newUpdater |
58 |
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(AtomicLongFieldUpdaterTest.class, "w"); |
56 |
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updaterFor("w"); |
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shouldThrow(); |
58 |
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} |
61 |
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|
62 |
< |
catch (RuntimeException rt) {} |
58 |
> |
} catch (IllegalArgumentException success) {} |
59 |
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} |
60 |
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|
61 |
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/** |
62 |
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* get returns the last value set or assigned |
62 |
> |
* get returns the last value set or assigned |
63 |
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*/ |
64 |
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public void testGetSet(){ |
64 |
> |
public void testGetSet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
66 |
< |
try { |
71 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
72 |
< |
} catch (RuntimeException ok) { |
73 |
< |
return; |
74 |
< |
} |
66 |
> |
a = updaterFor("x"); |
67 |
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x = 1; |
68 |
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assertEquals(1,a.get(this)); |
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a.set(this,2); |
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assertEquals(2,a.get(this)); |
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a.set(this,-3); |
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assertEquals(-3,a.get(this)); |
68 |
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assertEquals(1, a.get(this)); |
69 |
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a.set(this, 2); |
70 |
> |
assertEquals(2, a.get(this)); |
71 |
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a.set(this, -3); |
72 |
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assertEquals(-3, a.get(this)); |
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} |
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|
75 |
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/** |
76 |
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* get returns the last value lazySet by same thread |
76 |
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* get returns the last value lazySet by same thread |
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*/ |
78 |
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public void testGetLazySet(){ |
78 |
> |
public void testGetLazySet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
80 |
< |
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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} |
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a = updaterFor("x"); |
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x = 1; |
82 |
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assertEquals(1,a.get(this)); |
83 |
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a.lazySet(this,2); |
84 |
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assertEquals(2,a.get(this)); |
85 |
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a.lazySet(this,-3); |
86 |
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assertEquals(-3,a.get(this)); |
82 |
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assertEquals(1, a.get(this)); |
83 |
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a.lazySet(this, 2); |
84 |
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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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|
89 |
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/** |
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* compareAndSet succeeds in changing value if equal to expected else fails |
91 |
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*/ |
92 |
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public void testCompareAndSet(){ |
92 |
> |
public void testCompareAndSet() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
94 |
< |
try { |
108 |
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a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
109 |
< |
} catch (RuntimeException ok) { |
110 |
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return; |
111 |
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} |
94 |
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a = updaterFor("x"); |
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x = 1; |
96 |
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assertTrue(a.compareAndSet(this,1,2)); |
97 |
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assertTrue(a.compareAndSet(this,2,-4)); |
98 |
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assertEquals(-4,a.get(this)); |
99 |
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assertFalse(a.compareAndSet(this,-5,7)); |
100 |
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assertFalse((7 == a.get(this))); |
101 |
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assertTrue(a.compareAndSet(this,-4,7)); |
102 |
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assertEquals(7,a.get(this)); |
96 |
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assertTrue(a.compareAndSet(this, 1, 2)); |
97 |
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assertTrue(a.compareAndSet(this, 2, -4)); |
98 |
> |
assertEquals(-4, a.get(this)); |
99 |
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assertFalse(a.compareAndSet(this, -5, 7)); |
100 |
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assertEquals(-4, a.get(this)); |
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assertTrue(a.compareAndSet(this, -4, 7)); |
102 |
> |
assertEquals(7, a.get(this)); |
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} |
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|
122 |
– |
|
105 |
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/** |
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* compareAndSet in one thread enables another waiting for value |
107 |
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* to succeed |
108 |
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*/ |
109 |
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public void testCompareAndSetInMultipleThreads() { |
109 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
110 |
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x = 1; |
111 |
< |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a; |
112 |
< |
try { |
131 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
132 |
< |
} catch (RuntimeException ok) { |
133 |
< |
return; |
134 |
< |
} |
111 |
> |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
112 |
> |
a = updaterFor("x"); |
113 |
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|
114 |
< |
Thread t = new Thread(new Runnable() { |
115 |
< |
public void run() { |
116 |
< |
while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield(); |
117 |
< |
}}); |
118 |
< |
try { |
119 |
< |
t.start(); |
120 |
< |
assertTrue(a.compareAndSet(this, 1, 2)); |
121 |
< |
t.join(LONG_DELAY_MS); |
122 |
< |
assertFalse(t.isAlive()); |
123 |
< |
assertEquals(a.get(this), 3); |
124 |
< |
} |
147 |
< |
catch (Exception e) { |
148 |
< |
unexpectedException(); |
149 |
< |
} |
114 |
> |
Thread t = new Thread(new CheckedRunnable() { |
115 |
> |
public void realRun() { |
116 |
> |
while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) |
117 |
> |
Thread.yield(); |
118 |
> |
}}); |
119 |
> |
|
120 |
> |
t.start(); |
121 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
122 |
> |
t.join(LONG_DELAY_MS); |
123 |
> |
assertFalse(t.isAlive()); |
124 |
> |
assertEquals(3, a.get(this)); |
125 |
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} |
126 |
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|
127 |
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/** |
128 |
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* repeated weakCompareAndSet succeeds in changing value when equal |
129 |
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* to expected |
130 |
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*/ |
131 |
< |
public void testWeakCompareAndSet(){ |
131 |
> |
public void testWeakCompareAndSet() { |
132 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
133 |
< |
try { |
159 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
160 |
< |
} catch (RuntimeException ok) { |
161 |
< |
return; |
162 |
< |
} |
133 |
> |
a = updaterFor("x"); |
134 |
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x = 1; |
135 |
< |
while (!a.weakCompareAndSet(this,1,2)); |
136 |
< |
while (!a.weakCompareAndSet(this,2,-4)); |
137 |
< |
assertEquals(-4,a.get(this)); |
138 |
< |
while (!a.weakCompareAndSet(this,-4,7)); |
139 |
< |
assertEquals(7,a.get(this)); |
135 |
> |
while (!a.weakCompareAndSet(this, 1, 2)); |
136 |
> |
while (!a.weakCompareAndSet(this, 2, -4)); |
137 |
> |
assertEquals(-4, a.get(this)); |
138 |
> |
while (!a.weakCompareAndSet(this, -4, 7)); |
139 |
> |
assertEquals(7, a.get(this)); |
140 |
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} |
141 |
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|
142 |
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/** |
143 |
< |
* getAndSet returns previous value and sets to given value |
143 |
> |
* getAndSet returns previous value and sets to given value |
144 |
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*/ |
145 |
< |
public void testGetAndSet(){ |
145 |
> |
public void testGetAndSet() { |
146 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
147 |
< |
try { |
177 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
178 |
< |
} catch (RuntimeException ok) { |
179 |
< |
return; |
180 |
< |
} |
147 |
> |
a = updaterFor("x"); |
148 |
|
x = 1; |
149 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
150 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
151 |
< |
assertEquals(-10,a.getAndSet(this,1)); |
149 |
> |
assertEquals(1, a.getAndSet(this, 0)); |
150 |
> |
assertEquals(0, a.getAndSet(this, -10)); |
151 |
> |
assertEquals(-10, a.getAndSet(this, 1)); |
152 |
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} |
153 |
|
|
154 |
|
/** |
155 |
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* getAndAdd returns previous value and adds given value |
156 |
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*/ |
157 |
< |
public void testGetAndAdd(){ |
157 |
> |
public void testGetAndAdd() { |
158 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
159 |
< |
try { |
193 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
194 |
< |
} catch (RuntimeException ok) { |
195 |
< |
return; |
196 |
< |
} |
159 |
> |
a = updaterFor("x"); |
160 |
|
x = 1; |
161 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
162 |
< |
assertEquals(3,a.get(this)); |
163 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
164 |
< |
assertEquals(-1,a.get(this)); |
161 |
> |
assertEquals(1, a.getAndAdd(this, 2)); |
162 |
> |
assertEquals(3, a.get(this)); |
163 |
> |
assertEquals(3, a.getAndAdd(this, -4)); |
164 |
> |
assertEquals(-1, a.get(this)); |
165 |
|
} |
166 |
|
|
167 |
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/** |
168 |
|
* getAndDecrement returns previous value and decrements |
169 |
|
*/ |
170 |
< |
public void testGetAndDecrement(){ |
170 |
> |
public void testGetAndDecrement() { |
171 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
172 |
< |
try { |
210 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
211 |
< |
} catch (RuntimeException ok) { |
212 |
< |
return; |
213 |
< |
} |
172 |
> |
a = updaterFor("x"); |
173 |
|
x = 1; |
174 |
< |
assertEquals(1,a.getAndDecrement(this)); |
175 |
< |
assertEquals(0,a.getAndDecrement(this)); |
176 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
174 |
> |
assertEquals(1, a.getAndDecrement(this)); |
175 |
> |
assertEquals(0, a.getAndDecrement(this)); |
176 |
> |
assertEquals(-1, a.getAndDecrement(this)); |
177 |
|
} |
178 |
|
|
179 |
|
/** |
180 |
|
* getAndIncrement returns previous value and increments |
181 |
|
*/ |
182 |
< |
public void testGetAndIncrement(){ |
182 |
> |
public void testGetAndIncrement() { |
183 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
184 |
< |
try { |
226 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
227 |
< |
} catch (RuntimeException ok) { |
228 |
< |
return; |
229 |
< |
} |
184 |
> |
a = updaterFor("x"); |
185 |
|
x = 1; |
186 |
< |
assertEquals(1,a.getAndIncrement(this)); |
187 |
< |
assertEquals(2,a.get(this)); |
188 |
< |
a.set(this,-2); |
189 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
190 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
191 |
< |
assertEquals(0,a.getAndIncrement(this)); |
192 |
< |
assertEquals(1,a.get(this)); |
186 |
> |
assertEquals(1, a.getAndIncrement(this)); |
187 |
> |
assertEquals(2, a.get(this)); |
188 |
> |
a.set(this, -2); |
189 |
> |
assertEquals(-2, a.getAndIncrement(this)); |
190 |
> |
assertEquals(-1, a.getAndIncrement(this)); |
191 |
> |
assertEquals(0, a.getAndIncrement(this)); |
192 |
> |
assertEquals(1, a.get(this)); |
193 |
|
} |
194 |
|
|
195 |
|
/** |
196 |
|
* addAndGet adds given value to current, and returns current value |
197 |
|
*/ |
198 |
< |
public void testAddAndGet(){ |
198 |
> |
public void testAddAndGet() { |
199 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
200 |
< |
try { |
246 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
247 |
< |
} catch (RuntimeException ok) { |
248 |
< |
return; |
249 |
< |
} |
200 |
> |
a = updaterFor("x"); |
201 |
|
x = 1; |
202 |
< |
assertEquals(3,a.addAndGet(this,2)); |
203 |
< |
assertEquals(3,a.get(this)); |
204 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
205 |
< |
assertEquals(-1,a.get(this)); |
202 |
> |
assertEquals(3, a.addAndGet(this, 2)); |
203 |
> |
assertEquals(3, a.get(this)); |
204 |
> |
assertEquals(-1, a.addAndGet(this, -4)); |
205 |
> |
assertEquals(-1, a.get(this)); |
206 |
|
} |
207 |
|
|
208 |
|
/** |
209 |
< |
* decrementAndGet decrements and returns current value |
209 |
> |
* decrementAndGet decrements and returns current value |
210 |
|
*/ |
211 |
< |
public void testDecrementAndGet(){ |
211 |
> |
public void testDecrementAndGet() { |
212 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
213 |
< |
try { |
263 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
264 |
< |
} catch (RuntimeException ok) { |
265 |
< |
return; |
266 |
< |
} |
213 |
> |
a = updaterFor("x"); |
214 |
|
x = 1; |
215 |
< |
assertEquals(0,a.decrementAndGet(this)); |
216 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
217 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
218 |
< |
assertEquals(-2,a.get(this)); |
215 |
> |
assertEquals(0, a.decrementAndGet(this)); |
216 |
> |
assertEquals(-1, a.decrementAndGet(this)); |
217 |
> |
assertEquals(-2, a.decrementAndGet(this)); |
218 |
> |
assertEquals(-2, a.get(this)); |
219 |
|
} |
220 |
|
|
221 |
|
/** |
222 |
|
* incrementAndGet increments and returns current value |
223 |
|
*/ |
224 |
< |
public void testIncrementAndGet(){ |
224 |
> |
public void testIncrementAndGet() { |
225 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
226 |
< |
try { |
280 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
281 |
< |
} catch (RuntimeException ok) { |
282 |
< |
return; |
283 |
< |
} |
226 |
> |
a = updaterFor("x"); |
227 |
|
x = 1; |
228 |
< |
assertEquals(2,a.incrementAndGet(this)); |
229 |
< |
assertEquals(2,a.get(this)); |
230 |
< |
a.set(this,-2); |
231 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
232 |
< |
assertEquals(0,a.incrementAndGet(this)); |
233 |
< |
assertEquals(1,a.incrementAndGet(this)); |
234 |
< |
assertEquals(1,a.get(this)); |
228 |
> |
assertEquals(2, a.incrementAndGet(this)); |
229 |
> |
assertEquals(2, a.get(this)); |
230 |
> |
a.set(this, -2); |
231 |
> |
assertEquals(-1, a.incrementAndGet(this)); |
232 |
> |
assertEquals(0, a.incrementAndGet(this)); |
233 |
> |
assertEquals(1, a.incrementAndGet(this)); |
234 |
> |
assertEquals(1, a.get(this)); |
235 |
|
} |
236 |
|
|
237 |
|
} |