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Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.20 by jsr166, Fri May 27 19:39:07 2011 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/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.*;
#	Line 13 | Line 14 | public class AtomicIntegerFieldUpdaterTe
14		volatile int x = 0;
15		int w;
16		long z;
17	<	public static void main(String[] args){
17	>	public static void main(String[] args) {
18		junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
#	Line 21 | Line 22 | public class AtomicIntegerFieldUpdaterTe
22		}
23
24		/**
25	<	* Contruction with non-existent field throws RuntimeException
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	<	}
33	<	catch (RuntimeException rt) {}
33	>	} catch (RuntimeException success) {}
34		}
35
36		/**
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>
52	>	try {
53	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
54		a = AtomicIntegerFieldUpdater.newUpdater
55	<	(getClass(), "w");
55	>	(AtomicIntegerFieldUpdaterTest.class, "w");
56		shouldThrow();
57	<	}
59	<	catch (RuntimeException rt) {}
57	>	} catch (RuntimeException success) {}
58		}
59
60		/**
61	<	*  get returns the last value set or assigned
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	>	}
77	>
78	>	/**
79	>	* get returns the last value lazySet by same thread
80	>	*/
81	>	public void testGetLazySet() {
82	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
83	>	try {
84	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
85	>	} catch (RuntimeException ok) {
86	>	return;
87	>	}
88		x = 1;
89	<	assertEquals(1,a.get(this));
90	<	a.set(this,2);
91	<	assertEquals(2,a.get(this));
92	<	a.set(this,-3);
93	<	assertEquals(-3,a.get(this));
73	<
89	>	assertEquals(1,a.get(this));
90	>	a.lazySet(this,2);
91	>	assertEquals(2,a.get(this));
92	>	a.lazySet(this,-3);
93	>	assertEquals(-3,a.get(this));
94		}
95	+
96		/**
97		* compareAndSet succeeds in changing value if equal to expected else fails
98		*/
99		public void testCompareAndSet() {
100	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
100	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
101	>	try {
102	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
103	>	} catch (RuntimeException ok) {
104	>	return;
105	>	}
106		x = 1;
107	<	assertTrue(a.compareAndSet(this,1,2));
108	<	assertTrue(a.compareAndSet(this,2,-4));
109	<	assertEquals(-4,a.get(this));
110	<	assertFalse(a.compareAndSet(this,-5,7));
111	<	assertFalse((7 == a.get(this)));
112	<	assertTrue(a.compareAndSet(this,-4,7));
113	<	assertEquals(7,a.get(this));
107	>	assertTrue(a.compareAndSet(this,1,2));
108	>	assertTrue(a.compareAndSet(this,2,-4));
109	>	assertEquals(-4,a.get(this));
110	>	assertFalse(a.compareAndSet(this,-5,7));
111	>	assertEquals(-4,a.get(this));
112	>	assertTrue(a.compareAndSet(this,-4,7));
113	>	assertEquals(7,a.get(this));
114		}
115
90	–
116		/**
117		* compareAndSet in one thread enables another waiting for value
118		* to succeed
119		*/
120	<	public void testCompareAndSetInMultipleThreads() {
120	>	public void testCompareAndSetInMultipleThreads() throws Exception {
121		x = 1;
122	<	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
123	<
124	<	Thread t = new Thread(new Runnable() {
125	<	public void run() {
126	<	while(!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) Thread.yield();
102	<	}});
103	<	try {
104	<	t.start();
105	<	assertTrue(a.compareAndSet(this, 1, 2));
106	<	t.join(LONG_DELAY_MS);
107	<	assertFalse(t.isAlive());
108	<	assertEquals(a.get(this), 3);
109	<	}
110	<	catch(Exception e) {
111	<	unexpectedException();
122	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
123	>	try {
124	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
125	>	} catch (RuntimeException ok) {
126	>	return;
127		}
128	+
129	+	Thread t = new Thread(new CheckedRunnable() {
130	+	public void realRun() {
131	+	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
132	+	Thread.yield();
133	+	}});
134	+
135	+	t.start();
136	+	assertTrue(a.compareAndSet(this, 1, 2));
137	+	t.join(LONG_DELAY_MS);
138	+	assertFalse(t.isAlive());
139	+	assertEquals(a.get(this), 3);
140		}
141
142		/**
143		* repeated weakCompareAndSet succeeds in changing value when equal
144	<	* to expected
144	>	* to expected
145		*/
146		public void testWeakCompareAndSet() {
147	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
147	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
148	>	try {
149	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
150	>	} catch (RuntimeException ok) {
151	>	return;
152	>	}
153		x = 1;
154	<	while(!a.weakCompareAndSet(this,1,2));
155	<	while(!a.weakCompareAndSet(this,2,-4));
156	<	assertEquals(-4,a.get(this));
157	<	while(!a.weakCompareAndSet(this,-4,7));
158	<	assertEquals(7,a.get(this));
154	>	while (!a.weakCompareAndSet(this,1,2));
155	>	while (!a.weakCompareAndSet(this,2,-4));
156	>	assertEquals(-4,a.get(this));
157	>	while (!a.weakCompareAndSet(this,-4,7));
158	>	assertEquals(7,a.get(this));
159		}
160
161		/**
162	<	*  getAndSet returns previous value and sets to given value
162	>	* getAndSet returns previous value and sets to given value
163		*/
164		public void testGetAndSet() {
165	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
165	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
166	>	try {
167	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
168	>	} catch (RuntimeException ok) {
169	>	return;
170	>	}
171		x = 1;
172	<	assertEquals(1,a.getAndSet(this, 0));
173	<	assertEquals(0,a.getAndSet(this,-10));
174	<	assertEquals(-10,a.getAndSet(this,1));
172	>	assertEquals(1,a.getAndSet(this, 0));
173	>	assertEquals(0,a.getAndSet(this,-10));
174	>	assertEquals(-10,a.getAndSet(this,1));
175		}
176
177		/**
178		* getAndAdd returns previous value and adds given value
179		*/
180		public void testGetAndAdd() {
181	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
181	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
182	>	try {
183	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
184	>	} catch (RuntimeException ok) {
185	>	return;
186	>	}
187		x = 1;
188	<	assertEquals(1,a.getAndAdd(this,2));
189	<	assertEquals(3,a.get(this));
190	<	assertEquals(3,a.getAndAdd(this,-4));
191	<	assertEquals(-1,a.get(this));
188	>	assertEquals(1,a.getAndAdd(this,2));
189	>	assertEquals(3,a.get(this));
190	>	assertEquals(3,a.getAndAdd(this,-4));
191	>	assertEquals(-1,a.get(this));
192		}
193
194		/**
195		* getAndDecrement returns previous value and decrements
196		*/
197		public void testGetAndDecrement() {
198	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
198	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
199	>	try {
200	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
201	>	} catch (RuntimeException ok) {
202	>	return;
203	>	}
204		x = 1;
205	<	assertEquals(1,a.getAndDecrement(this));
206	<	assertEquals(0,a.getAndDecrement(this));
207	<	assertEquals(-1,a.getAndDecrement(this));
205	>	assertEquals(1,a.getAndDecrement(this));
206	>	assertEquals(0,a.getAndDecrement(this));
207	>	assertEquals(-1,a.getAndDecrement(this));
208		}
209
210		/**
211		* getAndIncrement returns previous value and increments
212		*/
213		public void testGetAndIncrement() {
214	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
214	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
215	>	try {
216	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
217	>	} catch (RuntimeException ok) {
218	>	return;
219	>	}
220		x = 1;
221	<	assertEquals(1,a.getAndIncrement(this));
222	<	assertEquals(2,a.get(this));
223	<	a.set(this,-2);
224	<	assertEquals(-2,a.getAndIncrement(this));
225	<	assertEquals(-1,a.getAndIncrement(this));
226	<	assertEquals(0,a.getAndIncrement(this));
227	<	assertEquals(1,a.get(this));
221	>	assertEquals(1,a.getAndIncrement(this));
222	>	assertEquals(2,a.get(this));
223	>	a.set(this,-2);
224	>	assertEquals(-2,a.getAndIncrement(this));
225	>	assertEquals(-1,a.getAndIncrement(this));
226	>	assertEquals(0,a.getAndIncrement(this));
227	>	assertEquals(1,a.get(this));
228		}
229
230		/**
231		* addAndGet adds given value to current, and returns current value
232		*/
233		public void testAddAndGet() {
234	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
234	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
235	>	try {
236	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
237	>	} catch (RuntimeException ok) {
238	>	return;
239	>	}
240		x = 1;
241	<	assertEquals(3,a.addAndGet(this,2));
242	<	assertEquals(3,a.get(this));
243	<	assertEquals(-1,a.addAndGet(this,-4));
244	<	assertEquals(-1,a.get(this));
241	>	assertEquals(3,a.addAndGet(this,2));
242	>	assertEquals(3,a.get(this));
243	>	assertEquals(-1,a.addAndGet(this,-4));
244	>	assertEquals(-1,a.get(this));
245		}
246
247		/**
248		* decrementAndGet decrements and returns current value
249		*/
250		public void testDecrementAndGet() {
251	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
251	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
252	>	try {
253	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
254	>	} catch (RuntimeException ok) {
255	>	return;
256	>	}
257		x = 1;
258	<	assertEquals(0,a.decrementAndGet(this));
259	<	assertEquals(-1,a.decrementAndGet(this));
260	<	assertEquals(-2,a.decrementAndGet(this));
261	<	assertEquals(-2,a.get(this));
258	>	assertEquals(0,a.decrementAndGet(this));
259	>	assertEquals(-1,a.decrementAndGet(this));
260	>	assertEquals(-2,a.decrementAndGet(this));
261	>	assertEquals(-2,a.get(this));
262		}
263
264		/**
265		* incrementAndGet increments and returns current value
266		*/
267		public void testIncrementAndGet() {
268	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
268	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
269	>	try {
270	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
271	>	} catch (RuntimeException ok) {
272	>	return;
273	>	}
274		x = 1;
275	<	assertEquals(2,a.incrementAndGet(this));
276	<	assertEquals(2,a.get(this));
277	<	a.set(this,-2);
278	<	assertEquals(-1,a.incrementAndGet(this));
279	<	assertEquals(0,a.incrementAndGet(this));
280	<	assertEquals(1,a.incrementAndGet(this));
281	<	assertEquals(1,a.get(this));
275	>	assertEquals(2,a.incrementAndGet(this));
276	>	assertEquals(2,a.get(this));
277	>	a.set(this,-2);
278	>	assertEquals(-1,a.incrementAndGet(this));
279	>	assertEquals(0,a.incrementAndGet(this));
280	>	assertEquals(1,a.incrementAndGet(this));
281	>	assertEquals(1,a.get(this));
282		}
283
284		}

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