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Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.30 by dl, Sun Nov 8 15:34:00 2015 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.*;
10	<	import junit.framework.*;
11	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
15		volatile int x = 0;
16	<	long z;
17	<
18	<	public static void main(String[] args){
19	<	junit.textui.TestRunner.run(suite());
16	>	protected volatile int protectedField;
17	>	private volatile int privateField;
18	>	int w;
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
19	–
20	–
23		public static Test suite() {
24		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
25		}
26
27	+	// for testing subclass access
28	+	static class AtomicIntegerFieldUpdaterTestSubclass extends AtomicIntegerFieldUpdaterTest {
29	+	public void checkPrivateAccess() {
30	+	try {
31	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
32	+	AtomicIntegerFieldUpdater.newUpdater
33	+	(AtomicIntegerFieldUpdaterTest.class, "privateField");
34	+	shouldThrow();
35	+	} catch (RuntimeException success) {
36	+	assertNotNull(success.getCause());
37	+	}
38	+	}
39	+
40	+	public void checkCompareAndSetProtectedSub() {
41	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
59	+	AtomicIntegerFieldUpdater.newUpdater
60	+	(AtomicIntegerFieldUpdaterTest.class, "x");
61	+	} catch (RuntimeException rex) {
62	+	ex = rex;
63	+	}
64	+	if (ex != null) throw new Error();
65	+	}
66	+	}
67	+
68	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
69	+	return AtomicIntegerFieldUpdater.newUpdater
70	+	(AtomicIntegerFieldUpdaterTest.class, fieldName);
71	+	}
72	+
73		/**
74	<	*
74	>	* Construction with non-existent field throws RuntimeException
75		*/
76		public void testConstructor() {
77	<	try{
78	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
31	<	a = AtomicIntegerFieldUpdater.newUpdater
32	<	(getClass(), "y");
77	>	try {
78	>	updaterFor("y");
79		shouldThrow();
80	+	} catch (RuntimeException success) {
81	+	assertNotNull(success.getCause());
82		}
35	–	catch (RuntimeException rt) {}
83		}
84
85		/**
86	<	*
86	>	* construction with field not of given type throws IllegalArgumentException
87		*/
88		public void testConstructor2() {
89	<	try{
90	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
44	<	a = AtomicIntegerFieldUpdater.newUpdater
45	<	(getClass(), "z");
89	>	try {
90	>	updaterFor("z");
91		shouldThrow();
92	<	}
93	<	catch (RuntimeException rt) {}
92	>	} catch (IllegalArgumentException success) {}
93	>	}
94	>
95	>	/**
96	>	* construction with non-volatile field throws IllegalArgumentException
97	>	*/
98	>	public void testConstructor3() {
99	>	try {
100	>	updaterFor("w");
101	>	shouldThrow();
102	>	} catch (IllegalArgumentException success) {}
103	>	}
104	>
105	>	/**
106	>	* construction using private field from subclass throws RuntimeException
107	>	*/
108	>	public void testPrivateFieldInSubclass() {
109	>	AtomicIntegerFieldUpdaterTestSubclass s =
110	>	new AtomicIntegerFieldUpdaterTestSubclass();
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
122		/**
123	<	*
123	>	* get returns the last value set or assigned
124		*/
125		public void testGetSet() {
126	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
126	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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));
134	>	}
135	>
136	>	/**
137	>	* get returns the last value lazySet by same thread
138	>	*/
139	>	public void testGetLazySet() {
140	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
141	>	a = updaterFor("x");
142		x = 1;
143	<	assertEquals(1,a.get(this));
144	<	a.set(this,2);
145	<	assertEquals(2,a.get(this));
146	<	a.set(this,-3);
147	<	assertEquals(-3,a.get(this));
62	<
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	+
150		/**
151	<	*
151	>	* compareAndSet succeeds in changing value if equal to expected else fails
152		*/
153		public void testCompareAndSet() {
154	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
154	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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));
164	>	}
165	>
166	>	/**
167	>	* compareAndSet succeeds in changing protected field value if
168	>	* equal to expected else fails
169	>	*/
170	>	public void testCompareAndSetProtected() {
171	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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	>	AtomicIntegerFieldUpdaterTestSubclass s =
189	>	new AtomicIntegerFieldUpdaterTestSubclass();
190	>	s.checkCompareAndSetProtectedSub();
191	>	}
192	>
193	>	/**
194	>	* compareAndSet in one thread enables another waiting for value
195	>	* to succeed
196	>	*/
197	>	public void testCompareAndSetInMultipleThreads() throws Exception {
198		x = 1;
199	<	assertTrue(a.compareAndSet(this,1,2));
200	<	assertTrue(a.compareAndSet(this,2,-4));
201	<	assertEquals(-4,a.get(this));
202	<	assertFalse(a.compareAndSet(this,-5,7));
203	<	assertFalse((7 == a.get(this)));
204	<	assertTrue(a.compareAndSet(this,-4,7));
205	<	assertEquals(7,a.get(this));
199	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
200	>	a = updaterFor("x");
201	>
202	>	Thread t = new Thread(new CheckedRunnable() {
203	>	public void realRun() {
204	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
205	>	Thread.yield();
206	>	}});
207	>
208	>	t.start();
209	>	assertTrue(a.compareAndSet(this, 1, 2));
210	>	t.join(LONG_DELAY_MS);
211	>	assertFalse(t.isAlive());
212	>	assertEquals(3, a.get(this));
213		}
214
215		/**
216	<	*
216	>	* repeated weakCompareAndSet succeeds in changing value when equal
217	>	* to expected
218		*/
219		public void testWeakCompareAndSet() {
220	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
220	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
231	<	*
231	>	* getAndSet returns previous value and sets to given value
232		*/
233		public void testGetAndSet() {
234	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
234	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
243	<	*
243	>	* getAndAdd returns previous value and adds given value
244		*/
245		public void testGetAndAdd() {
246	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
246	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
256	<	*
256	>	* getAndDecrement returns previous value and decrements
257		*/
258		public void testGetAndDecrement() {
259	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
259	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
268	<	*
268	>	* getAndIncrement returns previous value and increments
269		*/
270		public void testGetAndIncrement() {
271	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
271	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
284	<	*
284	>	* addAndGet adds given value to current, and returns current value
285		*/
286		public void testAddAndGet() {
287	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
287	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
297	<	*
297	>	* decrementAndGet decrements and returns current value
298		*/
299		public void testDecrementAndGet() {
300	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
300	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		/**
310	<	*
310	>	* incrementAndGet increments and returns current value
311		*/
312		public void testIncrementAndGet() {
313	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
313	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
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		}

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