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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.31 by jsr166, Mon Nov 9 07:54:28 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.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	<	long z;
17	<	int w;
18	<
19	<	public static void main(String[] args){
20	<	junit.textui.TestRunner.run(suite());
16	>	protected volatile long protectedField;
17	>	private volatile long privateField;
18	>	long w;
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
20	–
21	–
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	+	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 checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
56	+	obj.x = 72L;
57	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
58	+	AtomicLongFieldUpdater.newUpdater
59	+	(AtomicLongFieldUpdaterTest.class, "x");
60	+	assertEquals(72L, a.get(obj));
61	+	assertTrue(a.compareAndSet(obj, 72L, 73L));
62	+	assertEquals(73L, a.get(obj));
63	+	}
64	+
65	+	public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
66	+	try {
67	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
68	+	AtomicLongFieldUpdater.newUpdater
69	+	(AtomicLongFieldUpdaterTest.class, "privateField");
70	+	throw new AssertionError("should throw");
71	+	} catch (RuntimeException success) {
72	+	assertNotNull(success.getCause());
73	+	}
74	+	}
75	+	}
76	+
77	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
78	+	return AtomicLongFieldUpdater.newUpdater
79	+	(AtomicLongFieldUpdaterTest.class, fieldName);
80	+	}
81	+
82		/**
83	<	*
83	>	* Construction with non-existent field throws RuntimeException
84		*/
85	<	public void testConstructor(){
86	<	try{
87	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
32	<	a = AtomicLongFieldUpdater.newUpdater
33	<	(getClass(), "y");
85	>	public void testConstructor() {
86	>	try {
87	>	updaterFor("y");
88		shouldThrow();
89	+	} catch (RuntimeException success) {
90	+	assertNotNull(success.getCause());
91		}
36	–	catch (RuntimeException rt) {}
92		}
93
94		/**
95	<	*
95	>	* construction with field not of given type throws IllegalArgumentException
96		*/
97	<	public void testConstructor2(){
98	<	try{
99	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
45	<	a = AtomicLongFieldUpdater.newUpdater
46	<	(getClass(), "z");
97	>	public void testConstructor2() {
98	>	try {
99	>	updaterFor("z");
100		shouldThrow();
101	<	}
49	<	catch (RuntimeException rt) {}
101	>	} catch (IllegalArgumentException success) {}
102		}
103
104		/**
105	<	*
105	>	* construction with non-volatile field throws IllegalArgumentException
106		*/
107	<	public void testConstructor3(){
108	<	try{
109	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
58	<	a = AtomicLongFieldUpdater.newUpdater
59	<	(getClass(), "w");
107	>	public void testConstructor3() {
108	>	try {
109	>	updaterFor("w");
110		shouldThrow();
111	<	}
111	>	} catch (IllegalArgumentException success) {}
112	>	}
113
114	<	catch (RuntimeException rt) {}
114	>	/**
115	>	* construction using private field from subclass throws RuntimeException
116	>	*/
117	>	public void testPrivateFieldInSubclass() {
118	>	AtomicLongFieldUpdaterTestSubclass s =
119	>	new AtomicLongFieldUpdaterTestSubclass();
120	>	s.checkPrivateAccess();
121		}
122
123		/**
124	<	*
124	>	* construction from unrelated class; package access is allowed,
125	>	* private access is not
126		*/
127	<	public void testGetSet(){
128	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
127	>	public void testUnrelatedClassAccess() {
128	>	new UnrelatedClass().checkPackageAccess(this);
129	>	new UnrelatedClass().checkPrivateAccess(this);
130	>	}
131	>
132	>	/**
133	>	* get returns the last value set or assigned
134	>	*/
135	>	public void testGetSet() {
136	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
137	>	a = updaterFor("x");
138	>	x = 1;
139	>	assertEquals(1, a.get(this));
140	>	a.set(this, 2);
141	>	assertEquals(2, a.get(this));
142	>	a.set(this, -3);
143	>	assertEquals(-3, a.get(this));
144	>	}
145	>
146	>	/**
147	>	* get returns the last value lazySet by same thread
148	>	*/
149	>	public void testGetLazySet() {
150	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
151	>	a = updaterFor("x");
152	>	x = 1;
153	>	assertEquals(1, a.get(this));
154	>	a.lazySet(this, 2);
155	>	assertEquals(2, a.get(this));
156	>	a.lazySet(this, -3);
157	>	assertEquals(-3, a.get(this));
158	>	}
159	>
160	>	/**
161	>	* compareAndSet succeeds in changing value if equal to expected else fails
162	>	*/
163	>	public void testCompareAndSet() {
164	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
165	>	a = updaterFor("x");
166		x = 1;
167	<	assertEquals(1,a.get(this));
168	<	a.set(this,2);
169	<	assertEquals(2,a.get(this));
170	<	a.set(this,-3);
171	<	assertEquals(-3,a.get(this));
172	<
167	>	assertTrue(a.compareAndSet(this, 1, 2));
168	>	assertTrue(a.compareAndSet(this, 2, -4));
169	>	assertEquals(-4, a.get(this));
170	>	assertFalse(a.compareAndSet(this, -5, 7));
171	>	assertEquals(-4, a.get(this));
172	>	assertTrue(a.compareAndSet(this, -4, 7));
173	>	assertEquals(7, a.get(this));
174		}
175	+
176	+	/**
177	+	* compareAndSet succeeds in changing protected field value if
178	+	* equal to expected else fails
179	+	*/
180	+	public void testCompareAndSetProtected() {
181	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182	+	a = updaterFor("protectedField");
183	+	protectedField = 1;
184	+	assertTrue(a.compareAndSet(this, 1, 2));
185	+	assertTrue(a.compareAndSet(this, 2, -4));
186	+	assertEquals(-4, a.get(this));
187	+	assertFalse(a.compareAndSet(this, -5, 7));
188	+	assertEquals(-4, a.get(this));
189	+	assertTrue(a.compareAndSet(this, -4, 7));
190	+	assertEquals(7, a.get(this));
191	+	}
192	+
193		/**
194	<	*
194	>	* compareAndSet succeeds in changing protected field value if
195	>	* equal to expected else fails
196		*/
197	<	public void testCompareAndSet(){
198	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
197	>	public void testCompareAndSetProtectedInSubclass() {
198	>	AtomicLongFieldUpdaterTestSubclass s =
199	>	new AtomicLongFieldUpdaterTestSubclass();
200	>	s.checkCompareAndSetProtectedSub();
201	>	}
202	>
203	>	/**
204	>	* compareAndSet in one thread enables another waiting for value
205	>	* to succeed
206	>	*/
207	>	public void testCompareAndSetInMultipleThreads() throws Exception {
208		x = 1;
209	<	assertTrue(a.compareAndSet(this,1,2));
210	<	assertTrue(a.compareAndSet(this,2,-4));
211	<	assertEquals(-4,a.get(this));
212	<	assertFalse(a.compareAndSet(this,-5,7));
213	<	assertFalse((7 == a.get(this)));
214	<	assertTrue(a.compareAndSet(this,-4,7));
215	<	assertEquals(7,a.get(this));
209	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
210	>	a = updaterFor("x");
211	>
212	>	Thread t = new Thread(new CheckedRunnable() {
213	>	public void realRun() {
214	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
215	>	Thread.yield();
216	>	}});
217	>
218	>	t.start();
219	>	assertTrue(a.compareAndSet(this, 1, 2));
220	>	t.join(LONG_DELAY_MS);
221	>	assertFalse(t.isAlive());
222	>	assertEquals(3, a.get(this));
223		}
224
225		/**
226	<	*
226	>	* repeated weakCompareAndSet succeeds in changing value when equal
227	>	* to expected
228		*/
229	<	public void testWeakCompareAndSet(){
230	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
229	>	public void testWeakCompareAndSet() {
230	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
231	>	a = updaterFor("x");
232		x = 1;
233	<	while(!a.weakCompareAndSet(this,1,2));
234	<	while(!a.weakCompareAndSet(this,2,-4));
235	<	assertEquals(-4,a.get(this));
236	<	while(!a.weakCompareAndSet(this,-4,7));
237	<	assertEquals(7,a.get(this));
233	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
234	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
235	>	assertEquals(-4, a.get(this));
236	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
237	>	assertEquals(7, a.get(this));
238		}
239
240		/**
241	<	*
241	>	* getAndSet returns previous value and sets to given value
242		*/
243	<	public void testGetAndSet(){
244	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
243	>	public void testGetAndSet() {
244	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
245	>	a = updaterFor("x");
246		x = 1;
247	<	assertEquals(1,a.getAndSet(this, 0));
248	<	assertEquals(0,a.getAndSet(this,-10));
249	<	assertEquals(-10,a.getAndSet(this,1));
247	>	assertEquals(1, a.getAndSet(this, 0));
248	>	assertEquals(0, a.getAndSet(this, -10));
249	>	assertEquals(-10, a.getAndSet(this, 1));
250		}
251
252		/**
253	<	*
253	>	* getAndAdd returns previous value and adds given value
254		*/
255	<	public void testGetAndAdd(){
256	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
255	>	public void testGetAndAdd() {
256	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
257	>	a = updaterFor("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));
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));
263		}
264
265		/**
266	<	*
266	>	* getAndDecrement returns previous value and decrements
267		*/
268	<	public void testGetAndDecrement(){
269	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
268	>	public void testGetAndDecrement() {
269	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
270	>	a = updaterFor("x");
271		x = 1;
272	<	assertEquals(1,a.getAndDecrement(this));
273	<	assertEquals(0,a.getAndDecrement(this));
274	<	assertEquals(-1,a.getAndDecrement(this));
272	>	assertEquals(1, a.getAndDecrement(this));
273	>	assertEquals(0, a.getAndDecrement(this));
274	>	assertEquals(-1, a.getAndDecrement(this));
275		}
276
277		/**
278	<	*
278	>	* getAndIncrement returns previous value and increments
279		*/
280	<	public void testGetAndIncrement(){
281	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
280	>	public void testGetAndIncrement() {
281	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
282	>	a = updaterFor("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));
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));
291		}
292
293		/**
294	<	*
294	>	* addAndGet adds given value to current, and returns current value
295		*/
296	<	public void testAddAndGet(){
297	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
296	>	public void testAddAndGet() {
297	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
298	>	a = updaterFor("x");
299		x = 1;
300	<	assertEquals(3,a.addAndGet(this,2));
301	<	assertEquals(3,a.get(this));
302	<	assertEquals(-1,a.addAndGet(this,-4));
303	<	assertEquals(-1,a.get(this));
300	>	assertEquals(3, a.addAndGet(this, 2));
301	>	assertEquals(3, a.get(this));
302	>	assertEquals(-1, a.addAndGet(this, -4));
303	>	assertEquals(-1, a.get(this));
304		}
305
306		/**
307	<	*
307	>	* decrementAndGet decrements and returns current value
308		*/
309	<	public void testDecrementAndGet(){
310	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
309	>	public void testDecrementAndGet() {
310	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
311	>	a = updaterFor("x");
312		x = 1;
313	<	assertEquals(0,a.decrementAndGet(this));
314	<	assertEquals(-1,a.decrementAndGet(this));
315	<	assertEquals(-2,a.decrementAndGet(this));
316	<	assertEquals(-2,a.get(this));
313	>	assertEquals(0, a.decrementAndGet(this));
314	>	assertEquals(-1, a.decrementAndGet(this));
315	>	assertEquals(-2, a.decrementAndGet(this));
316	>	assertEquals(-2, a.get(this));
317		}
318
319		/**
320	<	*
320	>	* incrementAndGet increments and returns current value
321		*/
322	<	public void testIncrementAndGet(){
323	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
322	>	public void testIncrementAndGet() {
323	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
324	>	a = updaterFor("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));
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));
333		}
334
335		}

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