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root/jsr166/jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java

Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.16 by jsr166, Sat Nov 21 17:38:05 2009 UTC

#	Line 1 | Line 1
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.*;
#	Line 11 | Line 12 | import java.util.*;
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	<	}
35	<	catch (RuntimeException rt) {}
33	>	} catch (RuntimeException success) {}
34		}
35
36		/**
37	<	*
37	>	* construction with field not of given type throws RuntimeException
38		*/
39		public void testConstructor2() {
40	<	try{
41	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
40	>	try {
41	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
42		a = AtomicIntegerFieldUpdater.newUpdater
43	<	(getClass(), "z");
43	>	(AtomicIntegerFieldUpdaterTest.class, "z");
44		shouldThrow();
45	<	}
46	<	catch (RuntimeException rt) {}
45	>	} catch (RuntimeException success) {}
46	>	}
47	>
48	>	/**
49	>	* construction with non-volatile field throws RuntimeException
50	>	*/
51	>	public void testConstructor3() {
52	>	try {
53	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
54	>	a = AtomicIntegerFieldUpdater.newUpdater
55	>	(AtomicIntegerFieldUpdaterTest.class, "w");
56	>	shouldThrow();
57	>	} catch (RuntimeException success) {}
58		}
59
60		/**
61	<	*
61	>	*  get returns the last value set or assigned
62		*/
63		public void testGetSet() {
64	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
64	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
65	>	try {
66	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
67	>	} catch (RuntimeException ok) {
68	>	return;
69	>	}
70		x = 1;
71	<	assertEquals(1,a.get(this));
72	<	a.set(this,2);
73	<	assertEquals(2,a.get(this));
74	<	a.set(this,-3);
75	<	assertEquals(-3,a.get(this));
76	<
71	>	assertEquals(1,a.get(this));
72	>	a.set(this,2);
73	>	assertEquals(2,a.get(this));
74	>	a.set(this,-3);
75	>	assertEquals(-3,a.get(this));
76	>
77		}
78	+
79		/**
80	<	*
80	>	*  get returns the last value lazySet by same thread
81	>	*/
82	>	public void testGetLazySet() {
83	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
84	>	try {
85	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
86	>	} catch (RuntimeException ok) {
87	>	return;
88	>	}
89	>	x = 1;
90	>	assertEquals(1,a.get(this));
91	>	a.lazySet(this,2);
92	>	assertEquals(2,a.get(this));
93	>	a.lazySet(this,-3);
94	>	assertEquals(-3,a.get(this));
95	>
96	>	}
97	>
98	>	/**
99	>	* compareAndSet succeeds in changing value if equal to expected else fails
100		*/
101		public void testCompareAndSet() {
102	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
102	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
103	>	try {
104	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
105	>	} catch (RuntimeException ok) {
106	>	return;
107	>	}
108		x = 1;
109	<	assertTrue(a.compareAndSet(this,1,2));
110	<	assertTrue(a.compareAndSet(this,2,-4));
111	<	assertEquals(-4,a.get(this));
112	<	assertFalse(a.compareAndSet(this,-5,7));
113	<	assertFalse((7 == a.get(this)));
114	<	assertTrue(a.compareAndSet(this,-4,7));
115	<	assertEquals(7,a.get(this));
109	>	assertTrue(a.compareAndSet(this,1,2));
110	>	assertTrue(a.compareAndSet(this,2,-4));
111	>	assertEquals(-4,a.get(this));
112	>	assertFalse(a.compareAndSet(this,-5,7));
113	>	assertFalse((7 == a.get(this)));
114	>	assertTrue(a.compareAndSet(this,-4,7));
115	>	assertEquals(7,a.get(this));
116	>	}
117	>
118	>
119	>	/**
120	>	* compareAndSet in one thread enables another waiting for value
121	>	* to succeed
122	>	*/
123	>	public void testCompareAndSetInMultipleThreads() throws Exception {
124	>	x = 1;
125	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
126	>	try {
127	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
128	>	} catch (RuntimeException ok) {
129	>	return;
130	>	}
131	>
132	>	Thread t = new Thread(new CheckedRunnable() {
133	>	public void realRun() {
134	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
135	>	Thread.yield();
136	>	}});
137	>
138	>	t.start();
139	>	assertTrue(a.compareAndSet(this, 1, 2));
140	>	t.join(LONG_DELAY_MS);
141	>	assertFalse(t.isAlive());
142	>	assertEquals(a.get(this), 3);
143		}
144
145		/**
146	<	*
146	>	* repeated weakCompareAndSet succeeds in changing value when equal
147	>	* to expected
148		*/
149		public void testWeakCompareAndSet() {
150	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
150	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
151	>	try {
152	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
153	>	} catch (RuntimeException ok) {
154	>	return;
155	>	}
156		x = 1;
157	<	while(!a.weakCompareAndSet(this,1,2));
158	<	while(!a.weakCompareAndSet(this,2,-4));
159	<	assertEquals(-4,a.get(this));
160	<	while(!a.weakCompareAndSet(this,-4,7));
161	<	assertEquals(7,a.get(this));
157	>	while (!a.weakCompareAndSet(this,1,2));
158	>	while (!a.weakCompareAndSet(this,2,-4));
159	>	assertEquals(-4,a.get(this));
160	>	while (!a.weakCompareAndSet(this,-4,7));
161	>	assertEquals(7,a.get(this));
162		}
163
164		/**
165	<	*
165	>	*  getAndSet returns previous value and sets to given value
166		*/
167		public void testGetAndSet() {
168	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
168	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
169	>	try {
170	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
171	>	} catch (RuntimeException ok) {
172	>	return;
173	>	}
174		x = 1;
175	<	assertEquals(1,a.getAndSet(this, 0));
176	<	assertEquals(0,a.getAndSet(this,-10));
177	<	assertEquals(-10,a.getAndSet(this,1));
175	>	assertEquals(1,a.getAndSet(this, 0));
176	>	assertEquals(0,a.getAndSet(this,-10));
177	>	assertEquals(-10,a.getAndSet(this,1));
178		}
179
180		/**
181	<	*
181	>	* getAndAdd returns previous value and adds given value
182		*/
183		public void testGetAndAdd() {
184	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
184	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
185	>	try {
186	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
187	>	} catch (RuntimeException ok) {
188	>	return;
189	>	}
190		x = 1;
191	<	assertEquals(1,a.getAndAdd(this,2));
192	<	assertEquals(3,a.get(this));
193	<	assertEquals(3,a.getAndAdd(this,-4));
194	<	assertEquals(-1,a.get(this));
191	>	assertEquals(1,a.getAndAdd(this,2));
192	>	assertEquals(3,a.get(this));
193	>	assertEquals(3,a.getAndAdd(this,-4));
194	>	assertEquals(-1,a.get(this));
195		}
196
197		/**
198	<	*
198	>	* getAndDecrement returns previous value and decrements
199		*/
200		public void testGetAndDecrement() {
201	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
201	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
202	>	try {
203	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
204	>	} catch (RuntimeException ok) {
205	>	return;
206	>	}
207		x = 1;
208	<	assertEquals(1,a.getAndDecrement(this));
209	<	assertEquals(0,a.getAndDecrement(this));
210	<	assertEquals(-1,a.getAndDecrement(this));
208	>	assertEquals(1,a.getAndDecrement(this));
209	>	assertEquals(0,a.getAndDecrement(this));
210	>	assertEquals(-1,a.getAndDecrement(this));
211		}
212
213		/**
214	<	*
214	>	* getAndIncrement returns previous value and increments
215		*/
216		public void testGetAndIncrement() {
217	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
217	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
218	>	try {
219	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
220	>	} catch (RuntimeException ok) {
221	>	return;
222	>	}
223		x = 1;
224	<	assertEquals(1,a.getAndIncrement(this));
225	<	assertEquals(2,a.get(this));
226	<	a.set(this,-2);
227	<	assertEquals(-2,a.getAndIncrement(this));
228	<	assertEquals(-1,a.getAndIncrement(this));
229	<	assertEquals(0,a.getAndIncrement(this));
230	<	assertEquals(1,a.get(this));
224	>	assertEquals(1,a.getAndIncrement(this));
225	>	assertEquals(2,a.get(this));
226	>	a.set(this,-2);
227	>	assertEquals(-2,a.getAndIncrement(this));
228	>	assertEquals(-1,a.getAndIncrement(this));
229	>	assertEquals(0,a.getAndIncrement(this));
230	>	assertEquals(1,a.get(this));
231		}
232
233		/**
234	<	*
234	>	* addAndGet adds given value to current, and returns current value
235		*/
236		public void testAddAndGet() {
237	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
237	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
238	>	try {
239	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
240	>	} catch (RuntimeException ok) {
241	>	return;
242	>	}
243		x = 1;
244	<	assertEquals(3,a.addAndGet(this,2));
245	<	assertEquals(3,a.get(this));
246	<	assertEquals(-1,a.addAndGet(this,-4));
247	<	assertEquals(-1,a.get(this));
244	>	assertEquals(3,a.addAndGet(this,2));
245	>	assertEquals(3,a.get(this));
246	>	assertEquals(-1,a.addAndGet(this,-4));
247	>	assertEquals(-1,a.get(this));
248		}
249
250		/**
251	<	*
251	>	* decrementAndGet decrements and returns current value
252		*/
253		public void testDecrementAndGet() {
254	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
254	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
255	>	try {
256	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
257	>	} catch (RuntimeException ok) {
258	>	return;
259	>	}
260		x = 1;
261	<	assertEquals(0,a.decrementAndGet(this));
262	<	assertEquals(-1,a.decrementAndGet(this));
263	<	assertEquals(-2,a.decrementAndGet(this));
264	<	assertEquals(-2,a.get(this));
261	>	assertEquals(0,a.decrementAndGet(this));
262	>	assertEquals(-1,a.decrementAndGet(this));
263	>	assertEquals(-2,a.decrementAndGet(this));
264	>	assertEquals(-2,a.get(this));
265		}
266
267		/**
268	<	*
268	>	* incrementAndGet increments and returns current value
269		*/
270		public void testIncrementAndGet() {
271	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
271	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
272	>	try {
273	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
274	>	} catch (RuntimeException ok) {
275	>	return;
276	>	}
277		x = 1;
278	<	assertEquals(2,a.incrementAndGet(this));
279	<	assertEquals(2,a.get(this));
280	<	a.set(this,-2);
281	<	assertEquals(-1,a.incrementAndGet(this));
282	<	assertEquals(0,a.incrementAndGet(this));
283	<	assertEquals(1,a.incrementAndGet(this));
284	<	assertEquals(1,a.get(this));
278	>	assertEquals(2,a.incrementAndGet(this));
279	>	assertEquals(2,a.get(this));
280	>	a.set(this,-2);
281	>	assertEquals(-1,a.incrementAndGet(this));
282	>	assertEquals(0,a.incrementAndGet(this));
283	>	assertEquals(1,a.incrementAndGet(this));
284	>	assertEquals(1,a.get(this));
285		}
286
287		}

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