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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 { |
15 |
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volatile Integer x = null; |
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volatile Item x = null; |
16 |
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protected volatile Item protectedField; |
17 |
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private volatile Item privateField; |
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Object z; |
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Integer w; |
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Item 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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static AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> updaterFor(String fieldName) { |
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return AtomicReferenceFieldUpdater.newUpdater |
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(AtomicReferenceFieldUpdaterTest.class, Item.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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/** |
47 |
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* construction with field not of given type throws RuntimeException |
47 |
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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 { |
51 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> |
42 |
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a = AtomicReferenceFieldUpdater.newUpdater |
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(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z"); |
51 |
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updaterFor("z"); |
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shouldThrow(); |
53 |
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} catch (RuntimeException success) {} |
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} catch (ClassCastException success) {} |
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} |
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|
56 |
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/** |
57 |
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* Constructor with non-volatile field throws exception |
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* Constructor with non-volatile field throws IllegalArgumentException |
58 |
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*/ |
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public void testConstructor3() { |
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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, "w"); |
61 |
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updaterFor("w"); |
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shouldThrow(); |
63 |
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} catch (RuntimeException success) {} |
63 |
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} catch (IllegalArgumentException success) {} |
64 |
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} |
65 |
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|
66 |
> |
/** |
67 |
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* Constructor with non-reference field throws ClassCastException |
68 |
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*/ |
69 |
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public void testConstructor4() { |
70 |
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try { |
71 |
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updaterFor("i"); |
72 |
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shouldThrow(); |
73 |
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} catch (ClassCastException success) {} |
74 |
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} |
75 |
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|
76 |
> |
/** |
77 |
> |
* construction using private field from subclass throws RuntimeException |
78 |
> |
*/ |
79 |
> |
public void testPrivateFieldInSubclass() { |
80 |
> |
new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass() |
81 |
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.checkPrivateAccess(); |
82 |
> |
} |
83 |
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|
84 |
> |
/** |
85 |
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* construction from unrelated class; package access is allowed, |
86 |
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* private access is not |
87 |
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*/ |
88 |
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public void testUnrelatedClassAccess() { |
89 |
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new NonNestmates().checkPackageAccess(this); |
90 |
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new NonNestmates().checkPrivateAccess(this); |
91 |
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} |
92 |
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|
93 |
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/** |
94 |
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* get returns the last value set or assigned |
95 |
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*/ |
96 |
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public void testGetSet() { |
97 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
98 |
< |
try { |
66 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
67 |
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} catch (RuntimeException ok) { |
68 |
< |
return; |
69 |
< |
} |
97 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
98 |
> |
a = updaterFor("x"); |
99 |
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x = one; |
100 |
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assertSame(one, a.get(this)); |
101 |
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a.set(this, two); |
102 |
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assertSame(two, a.get(this)); |
103 |
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a.set(this, m3); |
104 |
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assertSame(m3, a.get(this)); |
103 |
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a.set(this, minusThree); |
104 |
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assertSame(minusThree, a.get(this)); |
105 |
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} |
106 |
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|
107 |
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/** |
108 |
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* get returns the last value lazySet by same thread |
109 |
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*/ |
110 |
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public void testGetLazySet() { |
111 |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
112 |
< |
try { |
84 |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
85 |
< |
} catch (RuntimeException ok) { |
86 |
< |
return; |
87 |
< |
} |
111 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
112 |
> |
a = updaterFor("x"); |
113 |
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x = one; |
114 |
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assertSame(one, a.get(this)); |
115 |
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a.lazySet(this, two); |
116 |
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assertSame(two, a.get(this)); |
117 |
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a.lazySet(this, m3); |
118 |
< |
assertSame(m3, a.get(this)); |
117 |
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a.lazySet(this, minusThree); |
118 |
> |
assertSame(minusThree, a.get(this)); |
119 |
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} |
120 |
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|
121 |
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/** |
122 |
< |
* compareAndSet succeeds in changing value if equal to expected else fails |
122 |
> |
* compareAndSet succeeds in changing value if same as expected else fails |
123 |
|
*/ |
124 |
|
public void testCompareAndSet() { |
125 |
< |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
126 |
< |
try { |
102 |
< |
a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
103 |
< |
} catch (RuntimeException ok) { |
104 |
< |
return; |
105 |
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} |
125 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
126 |
> |
a = updaterFor("x"); |
127 |
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x = one; |
128 |
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assertTrue(a.compareAndSet(this, one, two)); |
129 |
< |
assertTrue(a.compareAndSet(this, two, m4)); |
130 |
< |
assertSame(m4, a.get(this)); |
131 |
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assertFalse(a.compareAndSet(this, m5, seven)); |
132 |
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assertFalse(seven == a.get(this)); |
133 |
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assertTrue(a.compareAndSet(this, m4, seven)); |
129 |
> |
assertTrue(a.compareAndSet(this, two, minusFour)); |
130 |
> |
assertSame(minusFour, a.get(this)); |
131 |
> |
assertFalse(a.compareAndSet(this, minusFive, seven)); |
132 |
> |
assertNotSame(seven, a.get(this)); |
133 |
> |
assertTrue(a.compareAndSet(this, minusFour, seven)); |
134 |
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assertSame(seven, a.get(this)); |
135 |
|
} |
136 |
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|
137 |
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/** |
138 |
+ |
* compareAndSet succeeds in changing protected field value if |
139 |
+ |
* same as expected else fails |
140 |
+ |
*/ |
141 |
+ |
public void testCompareAndSetProtectedInSubclass() { |
142 |
+ |
new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass() |
143 |
+ |
.checkCompareAndSetProtectedSub(); |
144 |
+ |
} |
145 |
+ |
|
146 |
+ |
/** |
147 |
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* compareAndSet in one thread enables another waiting for value |
148 |
|
* to succeed |
149 |
|
*/ |
150 |
|
public void testCompareAndSetInMultipleThreads() throws Exception { |
151 |
|
x = one; |
152 |
< |
final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
153 |
< |
try { |
124 |
< |
a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
125 |
< |
} catch (RuntimeException ok) { |
126 |
< |
return; |
127 |
< |
} |
152 |
> |
final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
153 |
> |
a = updaterFor("x"); |
154 |
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|
155 |
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Thread t = new Thread(new CheckedRunnable() { |
156 |
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public void realRun() { |
162 |
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assertTrue(a.compareAndSet(this, one, two)); |
163 |
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t.join(LONG_DELAY_MS); |
164 |
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assertFalse(t.isAlive()); |
165 |
< |
assertSame(a.get(this), three); |
165 |
> |
assertSame(three, a.get(this)); |
166 |
|
} |
167 |
|
|
168 |
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/** |
169 |
< |
* repeated weakCompareAndSet succeeds in changing value when equal |
144 |
< |
* to expected |
169 |
> |
* repeated weakCompareAndSet succeeds in changing value when same as expected |
170 |
|
*/ |
171 |
|
public void testWeakCompareAndSet() { |
172 |
< |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
173 |
< |
try { |
149 |
< |
a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
150 |
< |
} catch (RuntimeException ok) { |
151 |
< |
return; |
152 |
< |
} |
172 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
173 |
> |
a = updaterFor("x"); |
174 |
|
x = one; |
175 |
< |
while (!a.weakCompareAndSet(this, one, two)); |
176 |
< |
while (!a.weakCompareAndSet(this, two, m4)); |
177 |
< |
assertSame(m4, a.get(this)); |
178 |
< |
while (!a.weakCompareAndSet(this, m4, seven)); |
175 |
> |
do {} while (!a.weakCompareAndSet(this, one, two)); |
176 |
> |
do {} while (!a.weakCompareAndSet(this, two, minusFour)); |
177 |
> |
assertSame(minusFour, a.get(this)); |
178 |
> |
do {} while (!a.weakCompareAndSet(this, minusFour, seven)); |
179 |
|
assertSame(seven, a.get(this)); |
180 |
|
} |
181 |
|
|
183 |
|
* getAndSet returns previous value and sets to given value |
184 |
|
*/ |
185 |
|
public void testGetAndSet() { |
186 |
< |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
187 |
< |
try { |
167 |
< |
a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
168 |
< |
} catch (RuntimeException ok) { |
169 |
< |
return; |
170 |
< |
} |
186 |
> |
AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a; |
187 |
> |
a = updaterFor("x"); |
188 |
|
x = one; |
189 |
|
assertSame(one, a.getAndSet(this, zero)); |
190 |
< |
assertSame(zero, a.getAndSet(this, m10)); |
191 |
< |
assertSame(m10, a.getAndSet(this, 1)); |
190 |
> |
assertSame(zero, a.getAndSet(this, minusTen)); |
191 |
> |
assertSame(minusTen, a.getAndSet(this, one)); |
192 |
|
} |
193 |
|
|
194 |
|
} |