1 |
|
/* |
2 |
< |
* Written by members of JCP JSR-166 Expert Group and released to the |
3 |
< |
* public domain. Use, modify, and redistribute this code in any way |
4 |
< |
* without acknowledgement. Other contributors include Andrew Wright, |
5 |
< |
* Jeffrey Hayes, Pat Fischer, Mike Judd. |
2 |
> |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
> |
* Expert Group and released to the public domain, as explained at |
4 |
> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
> |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
> |
* Pat Fisher, Mike Judd. |
7 |
|
*/ |
8 |
|
|
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 |
|
|
14 |
|
public class AtomicLongFieldUpdaterTest extends JSR166TestCase { |
15 |
|
volatile long x = 0; |
16 |
< |
int z; |
16 |
> |
protected volatile long protectedField; |
17 |
> |
private volatile long privateField; |
18 |
|
long w; |
19 |
< |
|
20 |
< |
public static void main(String[] args){ |
21 |
< |
junit.textui.TestRunner.run(suite()); |
19 |
> |
float z; |
20 |
> |
public static void main(String[] args) { |
21 |
> |
main(suite(), args); |
22 |
|
} |
23 |
|
public static Test suite() { |
24 |
|
return new TestSuite(AtomicLongFieldUpdaterTest.class); |
25 |
|
} |
26 |
|
|
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 |
+ |
AtomicLongFieldUpdater.newUpdater |
43 |
+ |
(AtomicLongFieldUpdaterTest.class, "protectedField"); |
44 |
+ |
this.protectedField = 1; |
45 |
+ |
assertTrue(a.compareAndSet(this, 1, 2)); |
46 |
+ |
assertTrue(a.compareAndSet(this, 2, -4)); |
47 |
+ |
assertEquals(-4, a.get(this)); |
48 |
+ |
assertFalse(a.compareAndSet(this, -5, 7)); |
49 |
+ |
assertEquals(-4, a.get(this)); |
50 |
+ |
assertTrue(a.compareAndSet(this, -4, 7)); |
51 |
+ |
assertEquals(7, a.get(this)); |
52 |
+ |
} |
53 |
+ |
} |
54 |
+ |
|
55 |
+ |
static class UnrelatedClass { |
56 |
+ |
public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) { |
57 |
+ |
obj.x = 72L; |
58 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = |
59 |
+ |
AtomicLongFieldUpdater.newUpdater |
60 |
+ |
(AtomicLongFieldUpdaterTest.class, "x"); |
61 |
+ |
assertEquals(72L, a.get(obj)); |
62 |
+ |
assertTrue(a.compareAndSet(obj, 72L, 73L)); |
63 |
+ |
assertEquals(73L, a.get(obj)); |
64 |
+ |
} |
65 |
+ |
|
66 |
+ |
public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) { |
67 |
+ |
try { |
68 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = |
69 |
+ |
AtomicLongFieldUpdater.newUpdater |
70 |
+ |
(AtomicLongFieldUpdaterTest.class, "privateField"); |
71 |
+ |
throw new AssertionError("should throw"); |
72 |
+ |
} catch (RuntimeException success) { |
73 |
+ |
assertNotNull(success.getCause()); |
74 |
+ |
} |
75 |
+ |
} |
76 |
+ |
} |
77 |
+ |
|
78 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) { |
79 |
+ |
return AtomicLongFieldUpdater.newUpdater |
80 |
+ |
(AtomicLongFieldUpdaterTest.class, fieldName); |
81 |
+ |
} |
82 |
+ |
|
83 |
|
/** |
84 |
< |
* Contruction with non-existent field throws RuntimeException |
84 |
> |
* Construction with non-existent field throws RuntimeException |
85 |
|
*/ |
86 |
< |
public void testConstructor(){ |
87 |
< |
try{ |
88 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
30 |
< |
a = AtomicLongFieldUpdater.newUpdater |
31 |
< |
(getClass(), "y"); |
86 |
> |
public void testConstructor() { |
87 |
> |
try { |
88 |
> |
updaterFor("y"); |
89 |
|
shouldThrow(); |
90 |
+ |
} catch (RuntimeException success) { |
91 |
+ |
assertNotNull(success.getCause()); |
92 |
|
} |
34 |
– |
catch (RuntimeException rt) {} |
93 |
|
} |
94 |
|
|
95 |
|
/** |
96 |
< |
* construction with field not of given type throws RuntimeException |
96 |
> |
* construction with field not of given type throws IllegalArgumentException |
97 |
|
*/ |
98 |
< |
public void testConstructor2(){ |
99 |
< |
try{ |
100 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
43 |
< |
a = AtomicLongFieldUpdater.newUpdater |
44 |
< |
(getClass(), "z"); |
98 |
> |
public void testConstructor2() { |
99 |
> |
try { |
100 |
> |
updaterFor("z"); |
101 |
|
shouldThrow(); |
102 |
< |
} |
47 |
< |
catch (RuntimeException rt) {} |
102 |
> |
} catch (IllegalArgumentException success) {} |
103 |
|
} |
104 |
|
|
105 |
|
/** |
106 |
< |
* construction with non-volatile field throws RuntimeException |
106 |
> |
* construction with non-volatile field throws IllegalArgumentException |
107 |
|
*/ |
108 |
< |
public void testConstructor3(){ |
109 |
< |
try{ |
110 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> |
56 |
< |
a = AtomicLongFieldUpdater.newUpdater |
57 |
< |
(getClass(), "w"); |
108 |
> |
public void testConstructor3() { |
109 |
> |
try { |
110 |
> |
updaterFor("w"); |
111 |
|
shouldThrow(); |
112 |
< |
} |
112 |
> |
} catch (IllegalArgumentException success) {} |
113 |
> |
} |
114 |
|
|
115 |
< |
catch (RuntimeException rt) {} |
115 |
> |
/** |
116 |
> |
* construction using private field from subclass throws RuntimeException |
117 |
> |
*/ |
118 |
> |
public void testPrivateFieldInSubclass() { |
119 |
> |
AtomicLongFieldUpdaterTestSubclass s = |
120 |
> |
new AtomicLongFieldUpdaterTestSubclass(); |
121 |
> |
s.checkPrivateAccess(); |
122 |
|
} |
123 |
|
|
124 |
|
/** |
125 |
< |
* get returns the last value set or assigned |
125 |
> |
* construction from unrelated class; package access is allowed, |
126 |
> |
* private access is not |
127 |
|
*/ |
128 |
< |
public void testGetSet(){ |
129 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
128 |
> |
public void testUnrelatedClassAccess() { |
129 |
> |
new UnrelatedClass().checkPackageAccess(this); |
130 |
> |
new UnrelatedClass().checkPrivateAccess(this); |
131 |
> |
} |
132 |
> |
|
133 |
> |
/** |
134 |
> |
* get returns the last value set or assigned |
135 |
> |
*/ |
136 |
> |
public void testGetSet() { |
137 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
138 |
> |
a = updaterFor("x"); |
139 |
|
x = 1; |
140 |
< |
assertEquals(1,a.get(this)); |
141 |
< |
a.set(this,2); |
142 |
< |
assertEquals(2,a.get(this)); |
143 |
< |
a.set(this,-3); |
144 |
< |
assertEquals(-3,a.get(this)); |
75 |
< |
|
140 |
> |
assertEquals(1, a.get(this)); |
141 |
> |
a.set(this, 2); |
142 |
> |
assertEquals(2, a.get(this)); |
143 |
> |
a.set(this, -3); |
144 |
> |
assertEquals(-3, a.get(this)); |
145 |
|
} |
146 |
+ |
|
147 |
|
/** |
148 |
< |
* compareAndSet succeeds in changing value if equal to expected else fails |
148 |
> |
* get returns the last value lazySet by same thread |
149 |
|
*/ |
150 |
< |
public void testCompareAndSet(){ |
151 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
150 |
> |
public void testGetLazySet() { |
151 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
152 |
> |
a = updaterFor("x"); |
153 |
|
x = 1; |
154 |
< |
assertTrue(a.compareAndSet(this,1,2)); |
155 |
< |
assertTrue(a.compareAndSet(this,2,-4)); |
156 |
< |
assertEquals(-4,a.get(this)); |
157 |
< |
assertFalse(a.compareAndSet(this,-5,7)); |
158 |
< |
assertFalse((7 == a.get(this))); |
159 |
< |
assertTrue(a.compareAndSet(this,-4,7)); |
160 |
< |
assertEquals(7,a.get(this)); |
154 |
> |
assertEquals(1, a.get(this)); |
155 |
> |
a.lazySet(this, 2); |
156 |
> |
assertEquals(2, a.get(this)); |
157 |
> |
a.lazySet(this, -3); |
158 |
> |
assertEquals(-3, a.get(this)); |
159 |
> |
} |
160 |
> |
|
161 |
> |
/** |
162 |
> |
* compareAndSet succeeds in changing value if equal to expected else fails |
163 |
> |
*/ |
164 |
> |
public void testCompareAndSet() { |
165 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
166 |
> |
a = updaterFor("x"); |
167 |
> |
x = 1; |
168 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
169 |
> |
assertTrue(a.compareAndSet(this, 2, -4)); |
170 |
> |
assertEquals(-4, a.get(this)); |
171 |
> |
assertFalse(a.compareAndSet(this, -5, 7)); |
172 |
> |
assertEquals(-4, a.get(this)); |
173 |
> |
assertTrue(a.compareAndSet(this, -4, 7)); |
174 |
> |
assertEquals(7, a.get(this)); |
175 |
|
} |
176 |
|
|
177 |
+ |
/** |
178 |
+ |
* compareAndSet succeeds in changing protected field value if |
179 |
+ |
* equal to expected else fails |
180 |
+ |
*/ |
181 |
+ |
public void testCompareAndSetProtected() { |
182 |
+ |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
183 |
+ |
a = updaterFor("protectedField"); |
184 |
+ |
protectedField = 1; |
185 |
+ |
assertTrue(a.compareAndSet(this, 1, 2)); |
186 |
+ |
assertTrue(a.compareAndSet(this, 2, -4)); |
187 |
+ |
assertEquals(-4, a.get(this)); |
188 |
+ |
assertFalse(a.compareAndSet(this, -5, 7)); |
189 |
+ |
assertEquals(-4, a.get(this)); |
190 |
+ |
assertTrue(a.compareAndSet(this, -4, 7)); |
191 |
+ |
assertEquals(7, a.get(this)); |
192 |
+ |
} |
193 |
+ |
|
194 |
+ |
/** |
195 |
+ |
* compareAndSet succeeds in changing protected field value if |
196 |
+ |
* equal to expected else fails |
197 |
+ |
*/ |
198 |
+ |
public void testCompareAndSetProtectedInSubclass() { |
199 |
+ |
AtomicLongFieldUpdaterTestSubclass s = |
200 |
+ |
new AtomicLongFieldUpdaterTestSubclass(); |
201 |
+ |
s.checkCompareAndSetProtectedSub(); |
202 |
+ |
} |
203 |
|
|
204 |
|
/** |
205 |
|
* compareAndSet in one thread enables another waiting for value |
206 |
|
* to succeed |
207 |
|
*/ |
208 |
< |
public void testCompareAndSetInMultipleThreads() { |
208 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
209 |
|
x = 1; |
210 |
< |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
210 |
> |
final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
211 |
> |
a = updaterFor("x"); |
212 |
|
|
213 |
< |
Thread t = new Thread(new Runnable() { |
214 |
< |
public void run() { |
215 |
< |
while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield(); |
216 |
< |
}}); |
217 |
< |
try { |
218 |
< |
t.start(); |
219 |
< |
assertTrue(a.compareAndSet(this, 1, 2)); |
220 |
< |
t.join(LONG_DELAY_MS); |
221 |
< |
assertFalse(t.isAlive()); |
222 |
< |
assertEquals(a.get(this), 3); |
223 |
< |
} |
112 |
< |
catch(Exception e) { |
113 |
< |
unexpectedException(); |
114 |
< |
} |
213 |
> |
Thread t = new Thread(new CheckedRunnable() { |
214 |
> |
public void realRun() { |
215 |
> |
while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) |
216 |
> |
Thread.yield(); |
217 |
> |
}}); |
218 |
> |
|
219 |
> |
t.start(); |
220 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
221 |
> |
t.join(LONG_DELAY_MS); |
222 |
> |
assertFalse(t.isAlive()); |
223 |
> |
assertEquals(3, a.get(this)); |
224 |
|
} |
225 |
|
|
226 |
|
/** |
227 |
|
* repeated weakCompareAndSet succeeds in changing value when equal |
228 |
< |
* to expected |
228 |
> |
* to expected |
229 |
|
*/ |
230 |
< |
public void testWeakCompareAndSet(){ |
231 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
230 |
> |
public void testWeakCompareAndSet() { |
231 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
232 |
> |
a = updaterFor("x"); |
233 |
|
x = 1; |
234 |
< |
while(!a.weakCompareAndSet(this,1,2)); |
235 |
< |
while(!a.weakCompareAndSet(this,2,-4)); |
236 |
< |
assertEquals(-4,a.get(this)); |
237 |
< |
while(!a.weakCompareAndSet(this,-4,7)); |
238 |
< |
assertEquals(7,a.get(this)); |
234 |
> |
do {} while (!a.weakCompareAndSet(this, 1, 2)); |
235 |
> |
do {} while (!a.weakCompareAndSet(this, 2, -4)); |
236 |
> |
assertEquals(-4, a.get(this)); |
237 |
> |
do {} while (!a.weakCompareAndSet(this, -4, 7)); |
238 |
> |
assertEquals(7, a.get(this)); |
239 |
|
} |
240 |
|
|
241 |
|
/** |
242 |
< |
* getAndSet returns previous value and sets to given value |
242 |
> |
* getAndSet returns previous value and sets to given value |
243 |
|
*/ |
244 |
< |
public void testGetAndSet(){ |
245 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
244 |
> |
public void testGetAndSet() { |
245 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
246 |
> |
a = updaterFor("x"); |
247 |
|
x = 1; |
248 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
249 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
250 |
< |
assertEquals(-10,a.getAndSet(this,1)); |
248 |
> |
assertEquals(1, a.getAndSet(this, 0)); |
249 |
> |
assertEquals(0, a.getAndSet(this, -10)); |
250 |
> |
assertEquals(-10, a.getAndSet(this, 1)); |
251 |
|
} |
252 |
|
|
253 |
|
/** |
254 |
|
* getAndAdd returns previous value and adds given value |
255 |
|
*/ |
256 |
< |
public void testGetAndAdd(){ |
257 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
258 |
< |
x = 1; |
259 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
260 |
< |
assertEquals(3,a.get(this)); |
261 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
262 |
< |
assertEquals(-1,a.get(this)); |
256 |
> |
public void testGetAndAdd() { |
257 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
258 |
> |
a = updaterFor("x"); |
259 |
> |
x = 1; |
260 |
> |
assertEquals(1, a.getAndAdd(this, 2)); |
261 |
> |
assertEquals(3, a.get(this)); |
262 |
> |
assertEquals(3, a.getAndAdd(this, -4)); |
263 |
> |
assertEquals(-1, a.get(this)); |
264 |
|
} |
265 |
|
|
266 |
|
/** |
267 |
|
* getAndDecrement returns previous value and decrements |
268 |
|
*/ |
269 |
< |
public void testGetAndDecrement(){ |
270 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
271 |
< |
x = 1; |
272 |
< |
assertEquals(1,a.getAndDecrement(this)); |
273 |
< |
assertEquals(0,a.getAndDecrement(this)); |
274 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
269 |
> |
public void testGetAndDecrement() { |
270 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
271 |
> |
a = updaterFor("x"); |
272 |
> |
x = 1; |
273 |
> |
assertEquals(1, a.getAndDecrement(this)); |
274 |
> |
assertEquals(0, a.getAndDecrement(this)); |
275 |
> |
assertEquals(-1, a.getAndDecrement(this)); |
276 |
|
} |
277 |
|
|
278 |
|
/** |
279 |
|
* getAndIncrement returns previous value and increments |
280 |
|
*/ |
281 |
< |
public void testGetAndIncrement(){ |
282 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
283 |
< |
x = 1; |
284 |
< |
assertEquals(1,a.getAndIncrement(this)); |
285 |
< |
assertEquals(2,a.get(this)); |
286 |
< |
a.set(this,-2); |
287 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
288 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
289 |
< |
assertEquals(0,a.getAndIncrement(this)); |
290 |
< |
assertEquals(1,a.get(this)); |
281 |
> |
public void testGetAndIncrement() { |
282 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
283 |
> |
a = updaterFor("x"); |
284 |
> |
x = 1; |
285 |
> |
assertEquals(1, a.getAndIncrement(this)); |
286 |
> |
assertEquals(2, a.get(this)); |
287 |
> |
a.set(this, -2); |
288 |
> |
assertEquals(-2, a.getAndIncrement(this)); |
289 |
> |
assertEquals(-1, a.getAndIncrement(this)); |
290 |
> |
assertEquals(0, a.getAndIncrement(this)); |
291 |
> |
assertEquals(1, a.get(this)); |
292 |
|
} |
293 |
|
|
294 |
|
/** |
295 |
|
* addAndGet adds given value to current, and returns current value |
296 |
|
*/ |
297 |
< |
public void testAddAndGet(){ |
298 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
297 |
> |
public void testAddAndGet() { |
298 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
299 |
> |
a = updaterFor("x"); |
300 |
|
x = 1; |
301 |
< |
assertEquals(3,a.addAndGet(this,2)); |
302 |
< |
assertEquals(3,a.get(this)); |
303 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
304 |
< |
assertEquals(-1,a.get(this)); |
301 |
> |
assertEquals(3, a.addAndGet(this, 2)); |
302 |
> |
assertEquals(3, a.get(this)); |
303 |
> |
assertEquals(-1, a.addAndGet(this, -4)); |
304 |
> |
assertEquals(-1, a.get(this)); |
305 |
|
} |
306 |
|
|
307 |
|
/** |
308 |
< |
* decrementAndGet decrements and returns current value |
308 |
> |
* decrementAndGet decrements and returns current value |
309 |
|
*/ |
310 |
< |
public void testDecrementAndGet(){ |
311 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
310 |
> |
public void testDecrementAndGet() { |
311 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
312 |
> |
a = updaterFor("x"); |
313 |
|
x = 1; |
314 |
< |
assertEquals(0,a.decrementAndGet(this)); |
315 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
316 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
317 |
< |
assertEquals(-2,a.get(this)); |
314 |
> |
assertEquals(0, a.decrementAndGet(this)); |
315 |
> |
assertEquals(-1, a.decrementAndGet(this)); |
316 |
> |
assertEquals(-2, a.decrementAndGet(this)); |
317 |
> |
assertEquals(-2, a.get(this)); |
318 |
|
} |
319 |
|
|
320 |
|
/** |
321 |
|
* incrementAndGet increments and returns current value |
322 |
|
*/ |
323 |
< |
public void testIncrementAndGet(){ |
324 |
< |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x"); |
325 |
< |
x = 1; |
326 |
< |
assertEquals(2,a.incrementAndGet(this)); |
327 |
< |
assertEquals(2,a.get(this)); |
328 |
< |
a.set(this,-2); |
329 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
330 |
< |
assertEquals(0,a.incrementAndGet(this)); |
331 |
< |
assertEquals(1,a.incrementAndGet(this)); |
332 |
< |
assertEquals(1,a.get(this)); |
323 |
> |
public void testIncrementAndGet() { |
324 |
> |
AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
325 |
> |
a = updaterFor("x"); |
326 |
> |
x = 1; |
327 |
> |
assertEquals(2, a.incrementAndGet(this)); |
328 |
> |
assertEquals(2, a.get(this)); |
329 |
> |
a.set(this, -2); |
330 |
> |
assertEquals(-1, a.incrementAndGet(this)); |
331 |
> |
assertEquals(0, a.incrementAndGet(this)); |
332 |
> |
assertEquals(1, a.incrementAndGet(this)); |
333 |
> |
assertEquals(1, a.get(this)); |
334 |
|
} |
335 |
|
|
336 |
|
} |