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/licenses/publicdomain |
5 |
> |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
> |
* Pat Fisher, Mike Judd. |
7 |
|
*/ |
8 |
|
|
9 |
|
import java.util.concurrent.atomic.*; |
12 |
|
|
13 |
|
public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase { |
14 |
|
volatile int x = 0; |
15 |
+ |
int w; |
16 |
|
long z; |
17 |
< |
|
16 |
< |
public static void main(String[] args){ |
17 |
> |
public static void main(String[] args) { |
18 |
|
junit.textui.TestRunner.run(suite()); |
19 |
|
} |
19 |
– |
|
20 |
– |
|
20 |
|
public static Test suite() { |
21 |
|
return new TestSuite(AtomicIntegerFieldUpdaterTest.class); |
22 |
|
} |
23 |
|
|
24 |
|
/** |
25 |
< |
* |
25 |
> |
* Construction with non-existent field throws RuntimeException |
26 |
|
*/ |
27 |
|
public void testConstructor() { |
28 |
< |
try{ |
29 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
28 |
> |
try { |
29 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
30 |
|
a = AtomicIntegerFieldUpdater.newUpdater |
31 |
< |
(getClass(), "y"); |
31 |
> |
(AtomicIntegerFieldUpdaterTest.class, "y"); |
32 |
|
shouldThrow(); |
33 |
|
} |
34 |
|
catch (RuntimeException rt) {} |
35 |
|
} |
36 |
|
|
37 |
|
/** |
38 |
< |
* |
38 |
> |
* construction with field not of given type throws RuntimeException |
39 |
|
*/ |
40 |
|
public void testConstructor2() { |
41 |
< |
try{ |
42 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
41 |
> |
try { |
42 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
43 |
> |
a = AtomicIntegerFieldUpdater.newUpdater |
44 |
> |
(AtomicIntegerFieldUpdaterTest.class, "z"); |
45 |
> |
shouldThrow(); |
46 |
> |
} |
47 |
> |
catch (RuntimeException rt) {} |
48 |
> |
} |
49 |
> |
|
50 |
> |
/** |
51 |
> |
* construction with non-volatile field throws RuntimeException |
52 |
> |
*/ |
53 |
> |
public void testConstructor3() { |
54 |
> |
try { |
55 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
56 |
|
a = AtomicIntegerFieldUpdater.newUpdater |
57 |
< |
(getClass(), "z"); |
57 |
> |
(AtomicIntegerFieldUpdaterTest.class, "w"); |
58 |
|
shouldThrow(); |
59 |
|
} |
60 |
|
catch (RuntimeException rt) {} |
61 |
|
} |
62 |
|
|
63 |
|
/** |
64 |
< |
* |
64 |
> |
* get returns the last value set or assigned |
65 |
|
*/ |
66 |
|
public void testGetSet() { |
67 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
67 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
68 |
> |
try { |
69 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
70 |
> |
} catch (RuntimeException ok) { |
71 |
> |
return; |
72 |
> |
} |
73 |
|
x = 1; |
74 |
< |
assertEquals(1,a.get(this)); |
75 |
< |
a.set(this,2); |
76 |
< |
assertEquals(2,a.get(this)); |
77 |
< |
a.set(this,-3); |
78 |
< |
assertEquals(-3,a.get(this)); |
79 |
< |
|
74 |
> |
assertEquals(1,a.get(this)); |
75 |
> |
a.set(this,2); |
76 |
> |
assertEquals(2,a.get(this)); |
77 |
> |
a.set(this,-3); |
78 |
> |
assertEquals(-3,a.get(this)); |
79 |
> |
|
80 |
|
} |
81 |
+ |
|
82 |
|
/** |
83 |
< |
* |
83 |
> |
* get returns the last value lazySet by same thread |
84 |
> |
*/ |
85 |
> |
public void testGetLazySet() { |
86 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
87 |
> |
try { |
88 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
89 |
> |
} catch (RuntimeException ok) { |
90 |
> |
return; |
91 |
> |
} |
92 |
> |
x = 1; |
93 |
> |
assertEquals(1,a.get(this)); |
94 |
> |
a.lazySet(this,2); |
95 |
> |
assertEquals(2,a.get(this)); |
96 |
> |
a.lazySet(this,-3); |
97 |
> |
assertEquals(-3,a.get(this)); |
98 |
> |
|
99 |
> |
} |
100 |
> |
|
101 |
> |
/** |
102 |
> |
* compareAndSet succeeds in changing value if equal to expected else fails |
103 |
|
*/ |
104 |
|
public void testCompareAndSet() { |
105 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
105 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
106 |
> |
try { |
107 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
108 |
> |
} catch (RuntimeException ok) { |
109 |
> |
return; |
110 |
> |
} |
111 |
|
x = 1; |
112 |
< |
assertTrue(a.compareAndSet(this,1,2)); |
113 |
< |
assertTrue(a.compareAndSet(this,2,-4)); |
114 |
< |
assertEquals(-4,a.get(this)); |
115 |
< |
assertFalse(a.compareAndSet(this,-5,7)); |
116 |
< |
assertFalse((7 == a.get(this))); |
117 |
< |
assertTrue(a.compareAndSet(this,-4,7)); |
118 |
< |
assertEquals(7,a.get(this)); |
112 |
> |
assertTrue(a.compareAndSet(this,1,2)); |
113 |
> |
assertTrue(a.compareAndSet(this,2,-4)); |
114 |
> |
assertEquals(-4,a.get(this)); |
115 |
> |
assertFalse(a.compareAndSet(this,-5,7)); |
116 |
> |
assertFalse((7 == a.get(this))); |
117 |
> |
assertTrue(a.compareAndSet(this,-4,7)); |
118 |
> |
assertEquals(7,a.get(this)); |
119 |
> |
} |
120 |
> |
|
121 |
> |
|
122 |
> |
/** |
123 |
> |
* compareAndSet in one thread enables another waiting for value |
124 |
> |
* to succeed |
125 |
> |
*/ |
126 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
127 |
> |
x = 1; |
128 |
> |
final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a; |
129 |
> |
try { |
130 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
131 |
> |
} catch (RuntimeException ok) { |
132 |
> |
return; |
133 |
> |
} |
134 |
> |
|
135 |
> |
Thread t = new Thread(new CheckedRunnable() { |
136 |
> |
public void realRun() { |
137 |
> |
while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) |
138 |
> |
Thread.yield(); |
139 |
> |
}}); |
140 |
> |
|
141 |
> |
t.start(); |
142 |
> |
assertTrue(a.compareAndSet(this, 1, 2)); |
143 |
> |
t.join(LONG_DELAY_MS); |
144 |
> |
assertFalse(t.isAlive()); |
145 |
> |
assertEquals(a.get(this), 3); |
146 |
|
} |
147 |
|
|
148 |
|
/** |
149 |
< |
* |
149 |
> |
* repeated weakCompareAndSet succeeds in changing value when equal |
150 |
> |
* to expected |
151 |
|
*/ |
152 |
|
public void testWeakCompareAndSet() { |
153 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
153 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
154 |
> |
try { |
155 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
156 |
> |
} catch (RuntimeException ok) { |
157 |
> |
return; |
158 |
> |
} |
159 |
|
x = 1; |
160 |
< |
while(!a.weakCompareAndSet(this,1,2)); |
161 |
< |
while(!a.weakCompareAndSet(this,2,-4)); |
162 |
< |
assertEquals(-4,a.get(this)); |
163 |
< |
while(!a.weakCompareAndSet(this,-4,7)); |
164 |
< |
assertEquals(7,a.get(this)); |
160 |
> |
while (!a.weakCompareAndSet(this,1,2)); |
161 |
> |
while (!a.weakCompareAndSet(this,2,-4)); |
162 |
> |
assertEquals(-4,a.get(this)); |
163 |
> |
while (!a.weakCompareAndSet(this,-4,7)); |
164 |
> |
assertEquals(7,a.get(this)); |
165 |
|
} |
166 |
|
|
167 |
|
/** |
168 |
< |
* |
168 |
> |
* getAndSet returns previous value and sets to given value |
169 |
|
*/ |
170 |
|
public void testGetAndSet() { |
171 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
171 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
172 |
> |
try { |
173 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
174 |
> |
} catch (RuntimeException ok) { |
175 |
> |
return; |
176 |
> |
} |
177 |
|
x = 1; |
178 |
< |
assertEquals(1,a.getAndSet(this, 0)); |
179 |
< |
assertEquals(0,a.getAndSet(this,-10)); |
180 |
< |
assertEquals(-10,a.getAndSet(this,1)); |
178 |
> |
assertEquals(1,a.getAndSet(this, 0)); |
179 |
> |
assertEquals(0,a.getAndSet(this,-10)); |
180 |
> |
assertEquals(-10,a.getAndSet(this,1)); |
181 |
|
} |
182 |
|
|
183 |
|
/** |
184 |
< |
* |
184 |
> |
* getAndAdd returns previous value and adds given value |
185 |
|
*/ |
186 |
|
public void testGetAndAdd() { |
187 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
187 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
188 |
> |
try { |
189 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
190 |
> |
} catch (RuntimeException ok) { |
191 |
> |
return; |
192 |
> |
} |
193 |
|
x = 1; |
194 |
< |
assertEquals(1,a.getAndAdd(this,2)); |
195 |
< |
assertEquals(3,a.get(this)); |
196 |
< |
assertEquals(3,a.getAndAdd(this,-4)); |
197 |
< |
assertEquals(-1,a.get(this)); |
194 |
> |
assertEquals(1,a.getAndAdd(this,2)); |
195 |
> |
assertEquals(3,a.get(this)); |
196 |
> |
assertEquals(3,a.getAndAdd(this,-4)); |
197 |
> |
assertEquals(-1,a.get(this)); |
198 |
|
} |
199 |
|
|
200 |
|
/** |
201 |
< |
* |
201 |
> |
* getAndDecrement returns previous value and decrements |
202 |
|
*/ |
203 |
|
public void testGetAndDecrement() { |
204 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
204 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
205 |
> |
try { |
206 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
207 |
> |
} catch (RuntimeException ok) { |
208 |
> |
return; |
209 |
> |
} |
210 |
|
x = 1; |
211 |
< |
assertEquals(1,a.getAndDecrement(this)); |
212 |
< |
assertEquals(0,a.getAndDecrement(this)); |
213 |
< |
assertEquals(-1,a.getAndDecrement(this)); |
211 |
> |
assertEquals(1,a.getAndDecrement(this)); |
212 |
> |
assertEquals(0,a.getAndDecrement(this)); |
213 |
> |
assertEquals(-1,a.getAndDecrement(this)); |
214 |
|
} |
215 |
|
|
216 |
|
/** |
217 |
< |
* |
217 |
> |
* getAndIncrement returns previous value and increments |
218 |
|
*/ |
219 |
|
public void testGetAndIncrement() { |
220 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
220 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
221 |
> |
try { |
222 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
223 |
> |
} catch (RuntimeException ok) { |
224 |
> |
return; |
225 |
> |
} |
226 |
|
x = 1; |
227 |
< |
assertEquals(1,a.getAndIncrement(this)); |
228 |
< |
assertEquals(2,a.get(this)); |
229 |
< |
a.set(this,-2); |
230 |
< |
assertEquals(-2,a.getAndIncrement(this)); |
231 |
< |
assertEquals(-1,a.getAndIncrement(this)); |
232 |
< |
assertEquals(0,a.getAndIncrement(this)); |
233 |
< |
assertEquals(1,a.get(this)); |
227 |
> |
assertEquals(1,a.getAndIncrement(this)); |
228 |
> |
assertEquals(2,a.get(this)); |
229 |
> |
a.set(this,-2); |
230 |
> |
assertEquals(-2,a.getAndIncrement(this)); |
231 |
> |
assertEquals(-1,a.getAndIncrement(this)); |
232 |
> |
assertEquals(0,a.getAndIncrement(this)); |
233 |
> |
assertEquals(1,a.get(this)); |
234 |
|
} |
235 |
|
|
236 |
|
/** |
237 |
< |
* |
237 |
> |
* addAndGet adds given value to current, and returns current value |
238 |
|
*/ |
239 |
|
public void testAddAndGet() { |
240 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
240 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
241 |
> |
try { |
242 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
243 |
> |
} catch (RuntimeException ok) { |
244 |
> |
return; |
245 |
> |
} |
246 |
|
x = 1; |
247 |
< |
assertEquals(3,a.addAndGet(this,2)); |
248 |
< |
assertEquals(3,a.get(this)); |
249 |
< |
assertEquals(-1,a.addAndGet(this,-4)); |
250 |
< |
assertEquals(-1,a.get(this)); |
247 |
> |
assertEquals(3,a.addAndGet(this,2)); |
248 |
> |
assertEquals(3,a.get(this)); |
249 |
> |
assertEquals(-1,a.addAndGet(this,-4)); |
250 |
> |
assertEquals(-1,a.get(this)); |
251 |
|
} |
252 |
|
|
253 |
|
/** |
254 |
< |
* |
254 |
> |
* decrementAndGet decrements and returns current value |
255 |
|
*/ |
256 |
|
public void testDecrementAndGet() { |
257 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
257 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
258 |
> |
try { |
259 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
260 |
> |
} catch (RuntimeException ok) { |
261 |
> |
return; |
262 |
> |
} |
263 |
|
x = 1; |
264 |
< |
assertEquals(0,a.decrementAndGet(this)); |
265 |
< |
assertEquals(-1,a.decrementAndGet(this)); |
266 |
< |
assertEquals(-2,a.decrementAndGet(this)); |
267 |
< |
assertEquals(-2,a.get(this)); |
264 |
> |
assertEquals(0,a.decrementAndGet(this)); |
265 |
> |
assertEquals(-1,a.decrementAndGet(this)); |
266 |
> |
assertEquals(-2,a.decrementAndGet(this)); |
267 |
> |
assertEquals(-2,a.get(this)); |
268 |
|
} |
269 |
|
|
270 |
|
/** |
271 |
< |
* |
271 |
> |
* incrementAndGet increments and returns current value |
272 |
|
*/ |
273 |
|
public void testIncrementAndGet() { |
274 |
< |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
274 |
> |
AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a; |
275 |
> |
try { |
276 |
> |
a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x"); |
277 |
> |
} catch (RuntimeException ok) { |
278 |
> |
return; |
279 |
> |
} |
280 |
|
x = 1; |
281 |
< |
assertEquals(2,a.incrementAndGet(this)); |
282 |
< |
assertEquals(2,a.get(this)); |
283 |
< |
a.set(this,-2); |
284 |
< |
assertEquals(-1,a.incrementAndGet(this)); |
285 |
< |
assertEquals(0,a.incrementAndGet(this)); |
286 |
< |
assertEquals(1,a.incrementAndGet(this)); |
287 |
< |
assertEquals(1,a.get(this)); |
281 |
> |
assertEquals(2,a.incrementAndGet(this)); |
282 |
> |
assertEquals(2,a.get(this)); |
283 |
> |
a.set(this,-2); |
284 |
> |
assertEquals(-1,a.incrementAndGet(this)); |
285 |
> |
assertEquals(0,a.incrementAndGet(this)); |
286 |
> |
assertEquals(1,a.incrementAndGet(this)); |
287 |
> |
assertEquals(1,a.get(this)); |
288 |
|
} |
289 |
|
|
290 |
|
} |