1 |
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/* |
2 |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
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* Expert Group and released to the public domain, as explained at |
4 |
< |
* http://creativecommons.org/licenses/publicdomain |
4 |
> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
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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 |
< |
import java.util.*; |
9 |
> |
import java.util.concurrent.atomic.AtomicLongFieldUpdater; |
10 |
> |
|
11 |
> |
import junit.framework.Test; |
12 |
> |
import junit.framework.TestSuite; |
13 |
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|
14 |
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public class AtomicLongFieldUpdaterTest extends JSR166TestCase { |
15 |
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volatile long x = 0; |
16 |
< |
int z; |
16 |
> |
protected volatile long protectedField; |
17 |
> |
private volatile long privateField; |
18 |
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long w; |
19 |
< |
|
19 |
> |
float z; |
20 |
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public static void main(String[] args) { |
21 |
< |
junit.textui.TestRunner.run(suite()); |
21 |
> |
main(suite(), args); |
22 |
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} |
23 |
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public static Test suite() { |
24 |
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return new TestSuite(AtomicLongFieldUpdaterTest.class); |
25 |
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} |
26 |
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|
27 |
+ |
// for testing subclass access |
28 |
+ |
static class AtomicLongFieldUpdaterTestSubclass extends AtomicLongFieldUpdaterTest { |
29 |
+ |
public void checkPrivateAccess() { |
30 |
+ |
try { |
31 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = |
32 |
+ |
AtomicLongFieldUpdater.newUpdater |
33 |
+ |
(AtomicLongFieldUpdaterTest.class, "privateField"); |
34 |
+ |
shouldThrow(); |
35 |
+ |
} catch (RuntimeException success) { |
36 |
+ |
assertNotNull(success.getCause()); |
37 |
+ |
} |
38 |
+ |
} |
39 |
+ |
|
40 |
+ |
public void checkCompareAndSetProtectedSub() { |
41 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
42 |
+ |
a = updaterFor("protectedField"); |
43 |
+ |
protectedField = 1; |
44 |
+ |
assertTrue(a.compareAndSet(this, 1, 2)); |
45 |
+ |
assertTrue(a.compareAndSet(this, 2, -4)); |
46 |
+ |
assertEquals(-4, a.get(this)); |
47 |
+ |
assertFalse(a.compareAndSet(this, -5, 7)); |
48 |
+ |
assertEquals(-4, a.get(this)); |
49 |
+ |
assertTrue(a.compareAndSet(this, -4, 7)); |
50 |
+ |
assertEquals(7, a.get(this)); |
51 |
+ |
} |
52 |
+ |
} |
53 |
+ |
|
54 |
+ |
static class UnrelatedClass { |
55 |
+ |
public void checkPrivateAccess() { |
56 |
+ |
Exception ex = null; |
57 |
+ |
try { |
58 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = |
59 |
+ |
AtomicLongFieldUpdater.newUpdater |
60 |
+ |
(AtomicLongFieldUpdaterTest.class, "x"); |
61 |
+ |
} catch (RuntimeException rex) { |
62 |
+ |
ex = rex; |
63 |
+ |
} |
64 |
+ |
if (ex != null) throw new Error(); |
65 |
+ |
} |
66 |
+ |
} |
67 |
+ |
|
68 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) { |
69 |
+ |
return AtomicLongFieldUpdater.newUpdater |
70 |
+ |
(AtomicLongFieldUpdaterTest.class, fieldName); |
71 |
+ |
} |
72 |
+ |
|
73 |
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/** |
74 |
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* Construction with non-existent field throws RuntimeException |
75 |
|
*/ |
76 |
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public void testConstructor() { |
77 |
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try { |
78 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
31 |
< |
a = AtomicLongFieldUpdater.newUpdater |
32 |
< |
(AtomicLongFieldUpdaterTest.class, "y"); |
78 |
> |
updaterFor("y"); |
79 |
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shouldThrow(); |
80 |
< |
} catch (RuntimeException success) {} |
80 |
> |
} catch (RuntimeException success) { |
81 |
> |
assertNotNull(success.getCause()); |
82 |
> |
} |
83 |
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} |
84 |
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|
85 |
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/** |
86 |
< |
* construction with field not of given type throws RuntimeException |
86 |
> |
* construction with field not of given type throws IllegalArgumentException |
87 |
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*/ |
88 |
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public void testConstructor2() { |
89 |
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try { |
90 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
43 |
< |
a = AtomicLongFieldUpdater.newUpdater |
44 |
< |
(AtomicLongFieldUpdaterTest.class, "z"); |
90 |
> |
updaterFor("z"); |
91 |
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shouldThrow(); |
92 |
< |
} catch (RuntimeException success) {} |
92 |
> |
} catch (IllegalArgumentException success) {} |
93 |
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} |
94 |
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|
95 |
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/** |
96 |
< |
* construction with non-volatile field throws RuntimeException |
96 |
> |
* construction with non-volatile field throws IllegalArgumentException |
97 |
|
*/ |
98 |
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public void testConstructor3() { |
99 |
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try { |
100 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
55 |
< |
a = AtomicLongFieldUpdater.newUpdater |
56 |
< |
(AtomicLongFieldUpdaterTest.class, "w"); |
100 |
> |
updaterFor("w"); |
101 |
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shouldThrow(); |
102 |
< |
} catch (RuntimeException success) {} |
102 |
> |
} catch (IllegalArgumentException success) {} |
103 |
> |
} |
104 |
> |
|
105 |
> |
/** |
106 |
> |
* construction using private field from subclass throws RuntimeException |
107 |
> |
*/ |
108 |
> |
public void testPrivateFieldInSubclass() { |
109 |
> |
AtomicLongFieldUpdaterTestSubclass s = |
110 |
> |
new AtomicLongFieldUpdaterTestSubclass(); |
111 |
> |
s.checkPrivateAccess(); |
112 |
> |
} |
113 |
> |
|
114 |
> |
/** |
115 |
> |
* construction from unrelated class throws RuntimeException |
116 |
> |
*/ |
117 |
> |
public void testUnrelatedClassAccess() { |
118 |
> |
UnrelatedClass s = new UnrelatedClass(); |
119 |
> |
s.checkPrivateAccess(); |
120 |
|
} |
121 |
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|
122 |
|
/** |
124 |
|
*/ |
125 |
|
public void testGetSet() { |
126 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
127 |
< |
try { |
67 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
68 |
< |
} catch (RuntimeException ok) { |
69 |
< |
return; |
70 |
< |
} |
127 |
> |
a = updaterFor("x"); |
128 |
|
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)); |
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 |
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} |
135 |
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|
136 |
|
/** |
138 |
|
*/ |
139 |
|
public void testGetLazySet() { |
140 |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
141 |
< |
try { |
85 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
86 |
< |
} catch (RuntimeException ok) { |
87 |
< |
return; |
88 |
< |
} |
141 |
> |
a = updaterFor("x"); |
142 |
|
x = 1; |
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)); |
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 |
|
} |
149 |
|
|
97 |
– |
|
150 |
|
/** |
151 |
|
* compareAndSet succeeds in changing value if equal to expected else fails |
152 |
|
*/ |
153 |
|
public void testCompareAndSet() { |
154 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
155 |
< |
try { |
104 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
105 |
< |
} catch (RuntimeException ok) { |
106 |
< |
return; |
107 |
< |
} |
155 |
> |
a = updaterFor("x"); |
156 |
|
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 |
< |
assertEquals(-4,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 |
|
} |
165 |
|
|
166 |
+ |
/** |
167 |
+ |
* compareAndSet succeeds in changing protected field value if |
168 |
+ |
* equal to expected else fails |
169 |
+ |
*/ |
170 |
+ |
public void testCompareAndSetProtected() { |
171 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> 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 |
+ |
AtomicLongFieldUpdaterTestSubclass s = |
189 |
+ |
new AtomicLongFieldUpdaterTestSubclass(); |
190 |
+ |
s.checkCompareAndSetProtectedSub(); |
191 |
+ |
} |
192 |
|
|
193 |
|
/** |
194 |
|
* compareAndSet in one thread enables another waiting for value |
196 |
|
*/ |
197 |
|
public void testCompareAndSetInMultipleThreads() throws Exception { |
198 |
|
x = 1; |
199 |
< |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a; |
200 |
< |
try { |
127 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
128 |
< |
} catch (RuntimeException ok) { |
129 |
< |
return; |
130 |
< |
} |
199 |
> |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
200 |
> |
a = updaterFor("x"); |
201 |
|
|
202 |
|
Thread t = new Thread(new CheckedRunnable() { |
203 |
|
public void realRun() { |
209 |
|
assertTrue(a.compareAndSet(this, 1, 2)); |
210 |
|
t.join(LONG_DELAY_MS); |
211 |
|
assertFalse(t.isAlive()); |
212 |
< |
assertEquals(a.get(this), 3); |
212 |
> |
assertEquals(3, a.get(this)); |
213 |
|
} |
214 |
|
|
215 |
|
/** |
218 |
|
*/ |
219 |
|
public void testWeakCompareAndSet() { |
220 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
221 |
< |
try { |
152 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
153 |
< |
} catch (RuntimeException ok) { |
154 |
< |
return; |
155 |
< |
} |
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 |
|
/** |
232 |
|
*/ |
233 |
|
public void testGetAndSet() { |
234 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
235 |
< |
try { |
170 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
171 |
< |
} catch (RuntimeException ok) { |
172 |
< |
return; |
173 |
< |
} |
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 |
|
/** |
244 |
|
*/ |
245 |
|
public void testGetAndAdd() { |
246 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
247 |
< |
try { |
186 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
187 |
< |
} catch (RuntimeException ok) { |
188 |
< |
return; |
189 |
< |
} |
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 |
|
/** |
257 |
|
*/ |
258 |
|
public void testGetAndDecrement() { |
259 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
260 |
< |
try { |
203 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
204 |
< |
} catch (RuntimeException ok) { |
205 |
< |
return; |
206 |
< |
} |
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 |
|
/** |
269 |
|
*/ |
270 |
|
public void testGetAndIncrement() { |
271 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
272 |
< |
try { |
219 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
220 |
< |
} catch (RuntimeException ok) { |
221 |
< |
return; |
222 |
< |
} |
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 |
|
/** |
285 |
|
*/ |
286 |
|
public void testAddAndGet() { |
287 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
288 |
< |
try { |
239 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
240 |
< |
} catch (RuntimeException ok) { |
241 |
< |
return; |
242 |
< |
} |
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 |
|
/** |
298 |
|
*/ |
299 |
|
public void testDecrementAndGet() { |
300 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
301 |
< |
try { |
256 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
257 |
< |
} catch (RuntimeException ok) { |
258 |
< |
return; |
259 |
< |
} |
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 |
|
/** |
311 |
|
*/ |
312 |
|
public void testIncrementAndGet() { |
313 |
|
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
314 |
< |
try { |
273 |
< |
a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x"); |
274 |
< |
} catch (RuntimeException ok) { |
275 |
< |
return; |
276 |
< |
} |
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 |
|
} |