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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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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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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. |
7 |
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*/ |
8 |
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|
9 |
< |
import java.util.concurrent.atomic.*; |
10 |
< |
import junit.framework.*; |
11 |
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import java.util.*; |
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import java.util.concurrent.atomic.AtomicIntegerFieldUpdater; |
10 |
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|
11 |
> |
import junit.framework.Test; |
12 |
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import junit.framework.TestSuite; |
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|
14 |
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public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase { |
15 |
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volatile int x = 0; |
16 |
+ |
protected volatile int protectedField; |
17 |
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private volatile int privateField; |
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int w; |
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long z; |
20 |
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public static void main(String[] args){ |
21 |
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junit.textui.TestRunner.run(suite()); |
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float z; |
20 |
> |
public static void main(String[] args) { |
21 |
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main(suite(), args); |
22 |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicIntegerFieldUpdaterTest.class); |
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} |
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|
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// for testing subclass access |
28 |
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static class AtomicIntegerFieldUpdaterTestSubclass extends AtomicIntegerFieldUpdaterTest { |
29 |
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public void checkPrivateAccess() { |
30 |
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try { |
31 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
32 |
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AtomicIntegerFieldUpdater.newUpdater |
33 |
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(AtomicIntegerFieldUpdaterTest.class, "privateField"); |
34 |
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shouldThrow(); |
35 |
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} catch (RuntimeException success) { |
36 |
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assertNotNull(success.getCause()); |
37 |
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} |
38 |
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} |
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|
40 |
+ |
public void checkCompareAndSetProtectedSub() { |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
42 |
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a = updaterFor("protectedField"); |
43 |
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protectedField = 1; |
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assertTrue(a.compareAndSet(this, 1, 2)); |
45 |
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assertTrue(a.compareAndSet(this, 2, -4)); |
46 |
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assertEquals(-4, a.get(this)); |
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assertFalse(a.compareAndSet(this, -5, 7)); |
48 |
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assertEquals(-4, a.get(this)); |
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assertTrue(a.compareAndSet(this, -4, 7)); |
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assertEquals(7, a.get(this)); |
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} |
52 |
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} |
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|
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static class UnrelatedClass { |
55 |
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public void checkPrivateAccess() { |
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Exception ex = null; |
57 |
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try { |
58 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = |
59 |
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AtomicIntegerFieldUpdater.newUpdater |
60 |
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(AtomicIntegerFieldUpdaterTest.class, "x"); |
61 |
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} catch (RuntimeException rex) { |
62 |
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ex = rex; |
63 |
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} |
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if (ex != null) throw new Error(); |
65 |
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} |
66 |
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} |
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|
68 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) { |
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return AtomicIntegerFieldUpdater.newUpdater |
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(AtomicIntegerFieldUpdaterTest.class, fieldName); |
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} |
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|
73 |
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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() { |
77 |
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try{ |
78 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
30 |
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a = AtomicIntegerFieldUpdater.newUpdater |
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(AtomicIntegerFieldUpdaterTest.class, "y"); |
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try { |
78 |
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updaterFor("y"); |
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shouldThrow(); |
80 |
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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 |
86 |
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* construction with field not of given type throws IllegalArgumentException |
87 |
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*/ |
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public void testConstructor2() { |
89 |
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try{ |
90 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
43 |
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a = AtomicIntegerFieldUpdater.newUpdater |
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(AtomicIntegerFieldUpdaterTest.class, "z"); |
89 |
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try { |
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updaterFor("z"); |
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shouldThrow(); |
92 |
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} |
47 |
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catch (RuntimeException rt) {} |
92 |
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} catch (IllegalArgumentException success) {} |
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} |
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|
95 |
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/** |
96 |
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* construction with non-volatile field throws RuntimeException |
96 |
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* construction with non-volatile field throws IllegalArgumentException |
97 |
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*/ |
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public void testConstructor3() { |
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try{ |
100 |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
56 |
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a = AtomicIntegerFieldUpdater.newUpdater |
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(AtomicIntegerFieldUpdaterTest.class, "w"); |
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try { |
100 |
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updaterFor("w"); |
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shouldThrow(); |
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} |
103 |
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catch (RuntimeException rt) {} |
102 |
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} catch (IllegalArgumentException success) {} |
103 |
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} |
104 |
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|
105 |
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/** |
106 |
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* construction using private field from subclass throws RuntimeException |
107 |
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*/ |
108 |
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public void testPrivateFieldInSubclass() { |
109 |
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AtomicIntegerFieldUpdaterTestSubclass s = |
110 |
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new AtomicIntegerFieldUpdaterTestSubclass(); |
111 |
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s.checkPrivateAccess(); |
112 |
> |
} |
113 |
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|
114 |
> |
/** |
115 |
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* construction from unrelated class throws RuntimeException |
116 |
> |
*/ |
117 |
> |
public void testUnrelatedClassAccess() { |
118 |
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UnrelatedClass s = new UnrelatedClass(); |
119 |
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s.checkPrivateAccess(); |
120 |
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} |
121 |
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|
122 |
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/** |
123 |
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* get returns the last value set or assigned |
123 |
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* get returns the last value set or assigned |
124 |
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*/ |
125 |
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public void testGetSet() { |
126 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
126 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
127 |
> |
a = updaterFor("x"); |
128 |
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x = 1; |
129 |
> |
assertEquals(1, a.get(this)); |
130 |
> |
a.set(this, 2); |
131 |
> |
assertEquals(2, a.get(this)); |
132 |
> |
a.set(this, -3); |
133 |
> |
assertEquals(-3, a.get(this)); |
134 |
> |
} |
135 |
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|
136 |
> |
/** |
137 |
> |
* get returns the last value lazySet by same thread |
138 |
> |
*/ |
139 |
> |
public void testGetLazySet() { |
140 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
141 |
> |
a = updaterFor("x"); |
142 |
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x = 1; |
143 |
< |
assertEquals(1,a.get(this)); |
144 |
< |
a.set(this,2); |
145 |
< |
assertEquals(2,a.get(this)); |
146 |
< |
a.set(this,-3); |
147 |
< |
assertEquals(-3,a.get(this)); |
74 |
< |
|
143 |
> |
assertEquals(1, a.get(this)); |
144 |
> |
a.lazySet(this, 2); |
145 |
> |
assertEquals(2, a.get(this)); |
146 |
> |
a.lazySet(this, -3); |
147 |
> |
assertEquals(-3, a.get(this)); |
148 |
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} |
149 |
+ |
|
150 |
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/** |
151 |
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* compareAndSet succeeds in changing value if equal to expected else fails |
152 |
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*/ |
153 |
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public void testCompareAndSet() { |
154 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
154 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
155 |
> |
a = updaterFor("x"); |
156 |
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x = 1; |
157 |
< |
assertTrue(a.compareAndSet(this,1,2)); |
158 |
< |
assertTrue(a.compareAndSet(this,2,-4)); |
159 |
< |
assertEquals(-4,a.get(this)); |
160 |
< |
assertFalse(a.compareAndSet(this,-5,7)); |
161 |
< |
assertFalse((7 == a.get(this))); |
162 |
< |
assertTrue(a.compareAndSet(this,-4,7)); |
163 |
< |
assertEquals(7,a.get(this)); |
157 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
158 |
> |
assertTrue(a.compareAndSet(this, 2, -4)); |
159 |
> |
assertEquals(-4, a.get(this)); |
160 |
> |
assertFalse(a.compareAndSet(this, -5, 7)); |
161 |
> |
assertEquals(-4, a.get(this)); |
162 |
> |
assertTrue(a.compareAndSet(this, -4, 7)); |
163 |
> |
assertEquals(7, a.get(this)); |
164 |
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} |
165 |
|
|
166 |
+ |
/** |
167 |
+ |
* compareAndSet succeeds in changing protected field value if |
168 |
+ |
* equal to expected else fails |
169 |
+ |
*/ |
170 |
+ |
public void testCompareAndSetProtected() { |
171 |
+ |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
172 |
+ |
a = updaterFor("protectedField"); |
173 |
+ |
protectedField = 1; |
174 |
+ |
assertTrue(a.compareAndSet(this, 1, 2)); |
175 |
+ |
assertTrue(a.compareAndSet(this, 2, -4)); |
176 |
+ |
assertEquals(-4, a.get(this)); |
177 |
+ |
assertFalse(a.compareAndSet(this, -5, 7)); |
178 |
+ |
assertEquals(-4, a.get(this)); |
179 |
+ |
assertTrue(a.compareAndSet(this, -4, 7)); |
180 |
+ |
assertEquals(7, a.get(this)); |
181 |
+ |
} |
182 |
+ |
|
183 |
+ |
/** |
184 |
+ |
* compareAndSet succeeds in changing protected field value if |
185 |
+ |
* equal to expected else fails |
186 |
+ |
*/ |
187 |
+ |
public void testCompareAndSetProtectedInSubclass() { |
188 |
+ |
AtomicIntegerFieldUpdaterTestSubclass s = |
189 |
+ |
new AtomicIntegerFieldUpdaterTestSubclass(); |
190 |
+ |
s.checkCompareAndSetProtectedSub(); |
191 |
+ |
} |
192 |
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|
193 |
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/** |
194 |
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* compareAndSet in one thread enables another waiting for value |
195 |
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* to succeed |
196 |
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*/ |
197 |
< |
public void testCompareAndSetInMultipleThreads() { |
197 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
198 |
|
x = 1; |
199 |
< |
final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
199 |
> |
final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
200 |
> |
a = updaterFor("x"); |
201 |
|
|
202 |
< |
Thread t = new Thread(new Runnable() { |
203 |
< |
public void run() { |
204 |
< |
while(!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) Thread.yield(); |
205 |
< |
}}); |
206 |
< |
try { |
207 |
< |
t.start(); |
208 |
< |
assertTrue(a.compareAndSet(this, 1, 2)); |
209 |
< |
t.join(LONG_DELAY_MS); |
210 |
< |
assertFalse(t.isAlive()); |
211 |
< |
assertEquals(a.get(this), 3); |
212 |
< |
} |
111 |
< |
catch(Exception e) { |
112 |
< |
unexpectedException(); |
113 |
< |
} |
202 |
> |
Thread t = new Thread(new CheckedRunnable() { |
203 |
> |
public void realRun() { |
204 |
> |
while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) |
205 |
> |
Thread.yield(); |
206 |
> |
}}); |
207 |
> |
|
208 |
> |
t.start(); |
209 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
210 |
> |
t.join(LONG_DELAY_MS); |
211 |
> |
assertFalse(t.isAlive()); |
212 |
> |
assertEquals(3, a.get(this)); |
213 |
|
} |
214 |
|
|
215 |
|
/** |
216 |
|
* repeated weakCompareAndSet succeeds in changing value when equal |
217 |
< |
* to expected |
217 |
> |
* to expected |
218 |
|
*/ |
219 |
|
public void testWeakCompareAndSet() { |
220 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
220 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
221 |
> |
a = updaterFor("x"); |
222 |
|
x = 1; |
223 |
< |
while(!a.weakCompareAndSet(this,1,2)); |
224 |
< |
while(!a.weakCompareAndSet(this,2,-4)); |
225 |
< |
assertEquals(-4,a.get(this)); |
226 |
< |
while(!a.weakCompareAndSet(this,-4,7)); |
227 |
< |
assertEquals(7,a.get(this)); |
223 |
> |
do {} while (!a.weakCompareAndSet(this, 1, 2)); |
224 |
> |
do {} while (!a.weakCompareAndSet(this, 2, -4)); |
225 |
> |
assertEquals(-4, a.get(this)); |
226 |
> |
do {} while (!a.weakCompareAndSet(this, -4, 7)); |
227 |
> |
assertEquals(7, a.get(this)); |
228 |
|
} |
229 |
|
|
230 |
|
/** |
231 |
< |
* getAndSet returns previous value and sets to given value |
231 |
> |
* getAndSet returns previous value and sets to given value |
232 |
|
*/ |
233 |
|
public void testGetAndSet() { |
234 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
234 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
235 |
> |
a = updaterFor("x"); |
236 |
|
x = 1; |
237 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
238 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
239 |
< |
assertEquals(-10,a.getAndSet(this,1)); |
237 |
> |
assertEquals(1, a.getAndSet(this, 0)); |
238 |
> |
assertEquals(0, a.getAndSet(this, -10)); |
239 |
> |
assertEquals(-10, a.getAndSet(this, 1)); |
240 |
|
} |
241 |
|
|
242 |
|
/** |
243 |
|
* getAndAdd returns previous value and adds given value |
244 |
|
*/ |
245 |
|
public void testGetAndAdd() { |
246 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
246 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
247 |
> |
a = updaterFor("x"); |
248 |
|
x = 1; |
249 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
250 |
< |
assertEquals(3,a.get(this)); |
251 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
252 |
< |
assertEquals(-1,a.get(this)); |
249 |
> |
assertEquals(1, a.getAndAdd(this, 2)); |
250 |
> |
assertEquals(3, a.get(this)); |
251 |
> |
assertEquals(3, a.getAndAdd(this, -4)); |
252 |
> |
assertEquals(-1, a.get(this)); |
253 |
|
} |
254 |
|
|
255 |
|
/** |
256 |
|
* getAndDecrement returns previous value and decrements |
257 |
|
*/ |
258 |
|
public void testGetAndDecrement() { |
259 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
259 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
260 |
> |
a = updaterFor("x"); |
261 |
|
x = 1; |
262 |
< |
assertEquals(1,a.getAndDecrement(this)); |
263 |
< |
assertEquals(0,a.getAndDecrement(this)); |
264 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
262 |
> |
assertEquals(1, a.getAndDecrement(this)); |
263 |
> |
assertEquals(0, a.getAndDecrement(this)); |
264 |
> |
assertEquals(-1, a.getAndDecrement(this)); |
265 |
|
} |
266 |
|
|
267 |
|
/** |
268 |
|
* getAndIncrement returns previous value and increments |
269 |
|
*/ |
270 |
|
public void testGetAndIncrement() { |
271 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
271 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
272 |
> |
a = updaterFor("x"); |
273 |
|
x = 1; |
274 |
< |
assertEquals(1,a.getAndIncrement(this)); |
275 |
< |
assertEquals(2,a.get(this)); |
276 |
< |
a.set(this,-2); |
277 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
278 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
279 |
< |
assertEquals(0,a.getAndIncrement(this)); |
280 |
< |
assertEquals(1,a.get(this)); |
274 |
> |
assertEquals(1, a.getAndIncrement(this)); |
275 |
> |
assertEquals(2, a.get(this)); |
276 |
> |
a.set(this, -2); |
277 |
> |
assertEquals(-2, a.getAndIncrement(this)); |
278 |
> |
assertEquals(-1, a.getAndIncrement(this)); |
279 |
> |
assertEquals(0, a.getAndIncrement(this)); |
280 |
> |
assertEquals(1, a.get(this)); |
281 |
|
} |
282 |
|
|
283 |
|
/** |
284 |
|
* addAndGet adds given value to current, and returns current value |
285 |
|
*/ |
286 |
|
public void testAddAndGet() { |
287 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
287 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
288 |
> |
a = updaterFor("x"); |
289 |
|
x = 1; |
290 |
< |
assertEquals(3,a.addAndGet(this,2)); |
291 |
< |
assertEquals(3,a.get(this)); |
292 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
293 |
< |
assertEquals(-1,a.get(this)); |
290 |
> |
assertEquals(3, a.addAndGet(this, 2)); |
291 |
> |
assertEquals(3, a.get(this)); |
292 |
> |
assertEquals(-1, a.addAndGet(this, -4)); |
293 |
> |
assertEquals(-1, a.get(this)); |
294 |
|
} |
295 |
|
|
296 |
|
/** |
297 |
|
* decrementAndGet decrements and returns current value |
298 |
|
*/ |
299 |
|
public void testDecrementAndGet() { |
300 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
300 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
301 |
> |
a = updaterFor("x"); |
302 |
|
x = 1; |
303 |
< |
assertEquals(0,a.decrementAndGet(this)); |
304 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
305 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
306 |
< |
assertEquals(-2,a.get(this)); |
303 |
> |
assertEquals(0, a.decrementAndGet(this)); |
304 |
> |
assertEquals(-1, a.decrementAndGet(this)); |
305 |
> |
assertEquals(-2, a.decrementAndGet(this)); |
306 |
> |
assertEquals(-2, a.get(this)); |
307 |
|
} |
308 |
|
|
309 |
|
/** |
310 |
|
* incrementAndGet increments and returns current value |
311 |
|
*/ |
312 |
|
public void testIncrementAndGet() { |
313 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
313 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
314 |
> |
a = updaterFor("x"); |
315 |
|
x = 1; |
316 |
< |
assertEquals(2,a.incrementAndGet(this)); |
317 |
< |
assertEquals(2,a.get(this)); |
318 |
< |
a.set(this,-2); |
319 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
320 |
< |
assertEquals(0,a.incrementAndGet(this)); |
321 |
< |
assertEquals(1,a.incrementAndGet(this)); |
322 |
< |
assertEquals(1,a.get(this)); |
316 |
> |
assertEquals(2, a.incrementAndGet(this)); |
317 |
> |
assertEquals(2, a.get(this)); |
318 |
> |
a.set(this, -2); |
319 |
> |
assertEquals(-1, a.incrementAndGet(this)); |
320 |
> |
assertEquals(0, a.incrementAndGet(this)); |
321 |
> |
assertEquals(1, a.incrementAndGet(this)); |
322 |
> |
assertEquals(1, a.get(this)); |
323 |
|
} |
324 |
|
|
325 |
|
} |