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Comparing jsr166/src/test/tck/AtomicIntegerArrayTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:52 2003 UTC vs.
Revision 1.34 by dl, Thu Jun 16 23:35:25 2016 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 junit.framework.*;
10	<	import java.util.concurrent.atomic.*;
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicIntegerArray;
11
12	<	public class AtomicIntegerArrayTest extends TestCase
13	<	{
13	<	static final int N = 10;
12	>	import junit.framework.Test;
13	>	import junit.framework.TestSuite;
14
15	<	public static void main (String[] args) {
16	<	junit.textui.TestRunner.run (suite());
15	>	public class AtomicIntegerArrayTest extends JSR166TestCase {
16	>
17	>	public static void main(String[] args) {
18	>	main(suite(), args);
19		}
20		public static Test suite() {
21		return new TestSuite(AtomicIntegerArrayTest.class);
22		}
23
24	<	public void testConstructor(){
25	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
26	<	for (int i = 0; i < N; ++i)
27	<	assertEquals(0,ai.get(i));
28	<	}
29	<
30	<	public void testGetSet(){
31	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
32	<	for (int i = 0; i < N; ++i) {
33	<	ai.set(i, 1);
34	<	assertEquals(1,ai.get(i));
35	<	ai.set(i, 2);
36	<	assertEquals(2,ai.get(i));
37	<	ai.set(i, -3);
38	<	assertEquals(-3,ai.get(i));
39	<	}
40	<	}
41	<
42	<	public void testCompareAndSet(){
43	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
44	<	for (int i = 0; i < N; ++i) {
45	<	ai.set(i, 1);
46	<	assertTrue(ai.compareAndSet(i, 1,2));
47	<	assertTrue(ai.compareAndSet(i, 2,-4));
48	<	assertEquals(-4,ai.get(i));
49	<	assertFalse(ai.compareAndSet(i, -5,7));
50	<	assertFalse((7 == ai.get(i)));
51	<	assertTrue(ai.compareAndSet(i, -4,7));
52	<	assertEquals(7,ai.get(i));
53	<	}
54	<	}
55	<
56	<	public void testWeakCompareAndSet(){
57	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
58	<	for (int i = 0; i < N; ++i) {
59	<	ai.set(i, 1);
60	<	while(!ai.weakCompareAndSet(i, 1,2));
61	<	while(!ai.weakCompareAndSet(i, 2,-4));
62	<	assertEquals(-4,ai.get(i));
63	<	while(!ai.weakCompareAndSet(i, -4,7));
64	<	assertEquals(7,ai.get(i));
65	<	}
66	<	}
67	<
68	<	public void testGetAndSet(){
69	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
70	<	for (int i = 0; i < N; ++i) {
71	<	ai.set(i, 1);
72	<	assertEquals(1,ai.getAndSet(i,0));
73	<	assertEquals(0,ai.getAndSet(i,-10));
74	<	assertEquals(-10,ai.getAndSet(i,1));
75	<	}
76	<	}
77	<
78	<	public void testGetAndAdd(){
79	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
80	<	for (int i = 0; i < N; ++i) {
81	<	ai.set(i, 1);
82	<	assertEquals(1,ai.getAndAdd(i,2));
83	<	assertEquals(3,ai.get(i));
84	<	assertEquals(3,ai.getAndAdd(i,-4));
85	<	assertEquals(-1,ai.get(i));
86	<	}
87	<	}
88	<
89	<	public void testGetAndDecrement(){
90	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
91	<	for (int i = 0; i < N; ++i) {
92	<	ai.set(i, 1);
93	<	assertEquals(1,ai.getAndDecrement(i));
94	<	assertEquals(0,ai.getAndDecrement(i));
95	<	assertEquals(-1,ai.getAndDecrement(i));
96	<	}
97	<	}
98	<
99	<	public void testGetAndIncrement(){
100	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
101	<	for (int i = 0; i < N; ++i) {
102	<	ai.set(i, 1);
103	<	assertEquals(1,ai.getAndIncrement(i));
104	<	assertEquals(2,ai.get(i));
105	<	ai.set(i,-2);
106	<	assertEquals(-2,ai.getAndIncrement(i));
107	<	assertEquals(-1,ai.getAndIncrement(i));
108	<	assertEquals(0,ai.getAndIncrement(i));
109	<	assertEquals(1,ai.get(i));
24	>	/**
25	>	* constructor creates array of given size with all elements zero
26	>	*/
27	>	public void testConstructor() {
28	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
29	>	for (int i = 0; i < SIZE; i++)
30	>	assertEquals(0, aa.get(i));
31	>	}
32	>
33	>	/**
34	>	* constructor with null array throws NPE
35	>	*/
36	>	public void testConstructor2NPE() {
37	>	try {
38	>	int[] a = null;
39	>	new AtomicIntegerArray(a);
40	>	shouldThrow();
41	>	} catch (NullPointerException success) {}
42	>	}
43	>
44	>	/**
45	>	* constructor with array is of same size and has all elements
46	>	*/
47	>	public void testConstructor2() {
48	>	int[] a = { 17, 3, -42, 99, -7 };
49	>	AtomicIntegerArray aa = new AtomicIntegerArray(a);
50	>	assertEquals(a.length, aa.length());
51	>	for (int i = 0; i < a.length; i++)
52	>	assertEquals(a[i], aa.get(i));
53	>	}
54	>
55	>	/**
56	>	* get and set for out of bound indices throw IndexOutOfBoundsException
57	>	*/
58	>	public void testIndexing() {
59	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
60	>	for (int index : new int[] { -1, SIZE }) {
61	>	try {
62	>	aa.get(index);
63	>	shouldThrow();
64	>	} catch (IndexOutOfBoundsException success) {}
65	>	try {
66	>	aa.set(index, 1);
67	>	shouldThrow();
68	>	} catch (IndexOutOfBoundsException success) {}
69	>	try {
70	>	aa.lazySet(index, 1);
71	>	shouldThrow();
72	>	} catch (IndexOutOfBoundsException success) {}
73	>	try {
74	>	aa.compareAndSet(index, 1, 2);
75	>	shouldThrow();
76	>	} catch (IndexOutOfBoundsException success) {}
77	>	try {
78	>	aa.weakCompareAndSet(index, 1, 2);
79	>	shouldThrow();
80	>	} catch (IndexOutOfBoundsException success) {}
81	>	try {
82	>	aa.getAndAdd(index, 1);
83	>	shouldThrow();
84	>	} catch (IndexOutOfBoundsException success) {}
85	>	try {
86	>	aa.addAndGet(index, 1);
87	>	shouldThrow();
88	>	} catch (IndexOutOfBoundsException success) {}
89	>	try {
90	>	aa.getPlain(index);
91	>	shouldThrow();
92	>	} catch (IndexOutOfBoundsException success) {}
93	>	try {
94	>	aa.getOpaque(index);
95	>	shouldThrow();
96	>	} catch (IndexOutOfBoundsException success) {}
97	>	try {
98	>	aa.getAcquire(index);
99	>	shouldThrow();
100	>	} catch (IndexOutOfBoundsException success) {}
101	>	try {
102	>	aa.setPlain(index, 1);
103	>	shouldThrow();
104	>	} catch (IndexOutOfBoundsException success) {}
105	>	try {
106	>	aa.setOpaque(index, 1);
107	>	shouldThrow();
108	>	} catch (IndexOutOfBoundsException success) {}
109	>	try {
110	>	aa.setRelease(index, 1);
111	>	shouldThrow();
112	>	} catch (IndexOutOfBoundsException success) {}
113	>	try {
114	>	aa.compareAndExchange(index, 1, 2);
115	>	shouldThrow();
116	>	} catch (IndexOutOfBoundsException success) {}
117	>	try {
118	>	aa.compareAndExchangeAcquire(index, 1, 2);
119	>	shouldThrow();
120	>	} catch (IndexOutOfBoundsException success) {}
121	>	try {
122	>	aa.compareAndExchangeRelease(index, 1, 2);
123	>	shouldThrow();
124	>	} catch (IndexOutOfBoundsException success) {}
125	>	try {
126	>	aa.weakCompareAndSetVolatile(index, 1, 2);
127	>	shouldThrow();
128	>	} catch (IndexOutOfBoundsException success) {}
129	>	try {
130	>	aa.weakCompareAndSetAcquire(index, 1, 2);
131	>	shouldThrow();
132	>	} catch (IndexOutOfBoundsException success) {}
133	>	try {
134	>	aa.weakCompareAndSetRelease(index, 1, 2);
135	>	shouldThrow();
136	>	} catch (IndexOutOfBoundsException success) {}
137		}
138		}
139
140	+	/**
141	+	* get returns the last value set at index
142	+	*/
143	+	public void testGetSet() {
144	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
145	+	for (int i = 0; i < SIZE; i++) {
146	+	aa.set(i, 1);
147	+	assertEquals(1, aa.get(i));
148	+	aa.set(i, 2);
149	+	assertEquals(2, aa.get(i));
150	+	aa.set(i, -3);
151	+	assertEquals(-3, aa.get(i));
152	+	}
153	+	}
154	+
155	+	/**
156	+	* get returns the last value lazySet at index by same thread
157	+	*/
158	+	public void testGetLazySet() {
159	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
160	+	for (int i = 0; i < SIZE; i++) {
161	+	aa.lazySet(i, 1);
162	+	assertEquals(1, aa.get(i));
163	+	aa.lazySet(i, 2);
164	+	assertEquals(2, aa.get(i));
165	+	aa.lazySet(i, -3);
166	+	assertEquals(-3, aa.get(i));
167	+	}
168	+	}
169	+
170	+	/**
171	+	* compareAndSet succeeds in changing value if equal to expected else fails
172	+	*/
173	+	public void testCompareAndSet() {
174	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
175	+	for (int i = 0; i < SIZE; i++) {
176	+	aa.set(i, 1);
177	+	assertTrue(aa.compareAndSet(i, 1, 2));
178	+	assertTrue(aa.compareAndSet(i, 2, -4));
179	+	assertEquals(-4, aa.get(i));
180	+	assertFalse(aa.compareAndSet(i, -5, 7));
181	+	assertEquals(-4, aa.get(i));
182	+	assertTrue(aa.compareAndSet(i, -4, 7));
183	+	assertEquals(7, aa.get(i));
184	+	}
185	+	}
186	+
187	+	/**
188	+	* compareAndSet in one thread enables another waiting for value
189	+	* to succeed
190	+	*/
191	+	public void testCompareAndSetInMultipleThreads() throws Exception {
192	+	final AtomicIntegerArray a = new AtomicIntegerArray(1);
193	+	a.set(0, 1);
194	+	Thread t = new Thread(new CheckedRunnable() {
195	+	public void realRun() {
196	+	while (!a.compareAndSet(0, 2, 3))
197	+	Thread.yield();
198	+	}});
199	+
200	+	t.start();
201	+	assertTrue(a.compareAndSet(0, 1, 2));
202	+	t.join(LONG_DELAY_MS);
203	+	assertFalse(t.isAlive());
204	+	assertEquals(3, a.get(0));
205	+	}
206	+
207	+	/**
208	+	* repeated weakCompareAndSet succeeds in changing value when equal
209	+	* to expected
210	+	*/
211	+	public void testWeakCompareAndSet() {
212	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
213	+	for (int i = 0; i < SIZE; i++) {
214	+	aa.set(i, 1);
215	+	do {} while (!aa.weakCompareAndSet(i, 1, 2));
216	+	do {} while (!aa.weakCompareAndSet(i, 2, -4));
217	+	assertEquals(-4, aa.get(i));
218	+	do {} while (!aa.weakCompareAndSet(i, -4, 7));
219	+	assertEquals(7, aa.get(i));
220	+	}
221	+	}
222	+
223	+	/**
224	+	* getAndSet returns previous value and sets to given value at given index
225	+	*/
226	+	public void testGetAndSet() {
227	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
228	+	for (int i = 0; i < SIZE; i++) {
229	+	aa.set(i, 1);
230	+	assertEquals(1, aa.getAndSet(i, 0));
231	+	assertEquals(0, aa.getAndSet(i, -10));
232	+	assertEquals(-10, aa.getAndSet(i, 1));
233	+	}
234	+	}
235	+
236	+	/**
237	+	* getAndAdd returns previous value and adds given value
238	+	*/
239	+	public void testGetAndAdd() {
240	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
241	+	for (int i = 0; i < SIZE; i++) {
242	+	aa.set(i, 1);
243	+	assertEquals(1, aa.getAndAdd(i, 2));
244	+	assertEquals(3, aa.get(i));
245	+	assertEquals(3, aa.getAndAdd(i, -4));
246	+	assertEquals(-1, aa.get(i));
247	+	}
248	+	}
249	+
250	+	/**
251	+	* getAndDecrement returns previous value and decrements
252	+	*/
253	+	public void testGetAndDecrement() {
254	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
255	+	for (int i = 0; i < SIZE; i++) {
256	+	aa.set(i, 1);
257	+	assertEquals(1, aa.getAndDecrement(i));
258	+	assertEquals(0, aa.getAndDecrement(i));
259	+	assertEquals(-1, aa.getAndDecrement(i));
260	+	}
261	+	}
262	+
263	+	/**
264	+	* getAndIncrement returns previous value and increments
265	+	*/
266	+	public void testGetAndIncrement() {
267	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
268	+	for (int i = 0; i < SIZE; i++) {
269	+	aa.set(i, 1);
270	+	assertEquals(1, aa.getAndIncrement(i));
271	+	assertEquals(2, aa.get(i));
272	+	aa.set(i, -2);
273	+	assertEquals(-2, aa.getAndIncrement(i));
274	+	assertEquals(-1, aa.getAndIncrement(i));
275	+	assertEquals(0, aa.getAndIncrement(i));
276	+	assertEquals(1, aa.get(i));
277	+	}
278	+	}
279	+
280	+	/**
281	+	* addAndGet adds given value to current, and returns current value
282	+	*/
283		public void testAddAndGet() {
284	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
285	<	for (int i = 0; i < N; ++i) {
286	<	ai.set(i, 1);
287	<	assertEquals(3,ai.addAndGet(i,2));
288	<	assertEquals(3,ai.get(i));
289	<	assertEquals(-1,ai.addAndGet(i,-4));
290	<	assertEquals(-1,ai.get(i));
284	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
285	>	for (int i = 0; i < SIZE; i++) {
286	>	aa.set(i, 1);
287	>	assertEquals(3, aa.addAndGet(i, 2));
288	>	assertEquals(3, aa.get(i));
289	>	assertEquals(-1, aa.addAndGet(i, -4));
290	>	assertEquals(-1, aa.get(i));
291		}
292		}
293
294	<	public void testDecrementAndGet(){
295	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
296	<	for (int i = 0; i < N; ++i) {
297	<	ai.set(i, 1);
298	<	assertEquals(0,ai.decrementAndGet(i));
299	<	assertEquals(-1,ai.decrementAndGet(i));
300	<	assertEquals(-2,ai.decrementAndGet(i));
301	<	assertEquals(-2,ai.get(i));
294	>	/**
295	>	* decrementAndGet decrements and returns current value
296	>	*/
297	>	public void testDecrementAndGet() {
298	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
299	>	for (int i = 0; i < SIZE; i++) {
300	>	aa.set(i, 1);
301	>	assertEquals(0, aa.decrementAndGet(i));
302	>	assertEquals(-1, aa.decrementAndGet(i));
303	>	assertEquals(-2, aa.decrementAndGet(i));
304	>	assertEquals(-2, aa.get(i));
305		}
306		}
307
308	+	/**
309	+	* incrementAndGet increments and returns current value
310	+	*/
311		public void testIncrementAndGet() {
312	<	AtomicIntegerArray ai = new AtomicIntegerArray(N);
313	<	for (int i = 0; i < N; ++i) {
314	<	ai.set(i, 1);
315	<	assertEquals(2,ai.incrementAndGet(i));
316	<	assertEquals(2,ai.get(i));
317	<	ai.set(i, -2);
318	<	assertEquals(-1,ai.incrementAndGet(i));
319	<	assertEquals(0,ai.incrementAndGet(i));
320	<	assertEquals(1,ai.incrementAndGet(i));
321	<	assertEquals(1,ai.get(i));
312	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
313	>	for (int i = 0; i < SIZE; i++) {
314	>	aa.set(i, 1);
315	>	assertEquals(2, aa.incrementAndGet(i));
316	>	assertEquals(2, aa.get(i));
317	>	aa.set(i, -2);
318	>	assertEquals(-1, aa.incrementAndGet(i));
319	>	assertEquals(0, aa.incrementAndGet(i));
320	>	assertEquals(1, aa.incrementAndGet(i));
321	>	assertEquals(1, aa.get(i));
322	>	}
323	>	}
324	>
325	>	class Counter extends CheckedRunnable {
326	>	final AtomicIntegerArray aa;
327	>	volatile int counts;
328	>	Counter(AtomicIntegerArray a) { aa = a; }
329	>	public void realRun() {
330	>	for (;;) {
331	>	boolean done = true;
332	>	for (int i = 0; i < aa.length(); i++) {
333	>	int v = aa.get(i);
334	>	assertTrue(v >= 0);
335	>	if (v != 0) {
336	>	done = false;
337	>	if (aa.compareAndSet(i, v, v - 1))
338	>	++counts;
339	>	}
340	>	}
341	>	if (done)
342	>	break;
343	>	}
344	>	}
345	>	}
346	>
347	>	/**
348	>	* Multiple threads using same array of counters successfully
349	>	* update a number of times equal to total count
350	>	*/
351	>	public void testCountingInMultipleThreads() throws InterruptedException {
352	>	final AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
353	>	int countdown = 10000;
354	>	for (int i = 0; i < SIZE; i++)
355	>	aa.set(i, countdown);
356	>	Counter c1 = new Counter(aa);
357	>	Counter c2 = new Counter(aa);
358	>	Thread t1 = new Thread(c1);
359	>	Thread t2 = new Thread(c2);
360	>	t1.start();
361	>	t2.start();
362	>	t1.join();
363	>	t2.join();
364	>	assertEquals(c1.counts+c2.counts, SIZE * countdown);
365	>	}
366	>
367	>	/**
368	>	* a deserialized serialized array holds same values
369	>	*/
370	>	public void testSerialization() throws Exception {
371	>	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
372	>	for (int i = 0; i < SIZE; i++)
373	>	x.set(i, -i);
374	>	AtomicIntegerArray y = serialClone(x);
375	>	assertNotSame(x, y);
376	>	assertEquals(x.length(), y.length());
377	>	for (int i = 0; i < SIZE; i++) {
378	>	assertEquals(x.get(i), y.get(i));
379	>	}
380	>	}
381	>
382	>	/**
383	>	* toString returns current value.
384	>	*/
385	>	public void testToString() {
386	>	int[] a = { 17, 3, -42, 99, -7 };
387	>	AtomicIntegerArray aa = new AtomicIntegerArray(a);
388	>	assertEquals(Arrays.toString(a), aa.toString());
389	>	}
390	>
391	>	// jdk9
392	>
393	>	/**
394	>	* getPlain returns the last value set
395	>	*/
396	>	public void testGetPlainSet() {
397	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
398	>	for (int i = 0; i < SIZE; i++) {
399	>	aa.set(i, 1);
400	>	assertEquals(1, aa.getPlain(i));
401	>	aa.set(i, 2);
402	>	assertEquals(2, aa.getPlain(i));
403	>	aa.set(i, -3);
404	>	assertEquals(-3, aa.getPlain(i));
405		}
406		}
407
408	+	/**
409	+	* getOpaque returns the last value set
410	+	*/
411	+	public void testGetOpaqueSet() {
412	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
413	+	for (int i = 0; i < SIZE; i++) {
414	+	aa.set(i, 1);
415	+	assertEquals(1, aa.getOpaque(i));
416	+	aa.set(i, 2);
417	+	assertEquals(2, aa.getOpaque(i));
418	+	aa.set(i, -3);
419	+	assertEquals(-3, aa.getOpaque(i));
420	+	}
421	+	}
422	+
423	+	/**
424	+	* getAcquire returns the last value set
425	+	*/
426	+	public void testGetAcquireSet() {
427	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
428	+	for (int i = 0; i < SIZE; i++) {
429	+	aa.set(i, 1);
430	+	assertEquals(1, aa.getAcquire(i));
431	+	aa.set(i, 2);
432	+	assertEquals(2, aa.getAcquire(i));
433	+	aa.set(i, -3);
434	+	assertEquals(-3, aa.getAcquire(i));
435	+	}
436	+	}
437	+
438	+	/**
439	+	* get returns the last value setPlain
440	+	*/
441	+	public void testGetSetPlain() {
442	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
443	+	for (int i = 0; i < SIZE; i++) {
444	+	aa.setPlain(i, 1);
445	+	assertEquals(1, aa.get(i));
446	+	aa.setPlain(i, 2);
447	+	assertEquals(2, aa.get(i));
448	+	aa.setPlain(i, -3);
449	+	assertEquals(-3, aa.get(i));
450	+	}
451	+	}
452	+
453	+	/**
454	+	* get returns the last value setOpaque
455	+	*/
456	+	public void testGetSetOpaque() {
457	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
458	+	for (int i = 0; i < SIZE; i++) {
459	+	aa.setOpaque(i, 1);
460	+	assertEquals(1, aa.get(i));
461	+	aa.setOpaque(i, 2);
462	+	assertEquals(2, aa.get(i));
463	+	aa.setOpaque(i, -3);
464	+	assertEquals(-3, aa.get(i));
465	+	}
466	+	}
467	+
468	+	/**
469	+	* get returns the last value setRelease
470	+	*/
471	+	public void testGetSetRelease() {
472	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
473	+	for (int i = 0; i < SIZE; i++) {
474	+	aa.setRelease(i, 1);
475	+	assertEquals(1, aa.get(i));
476	+	aa.setRelease(i, 2);
477	+	assertEquals(2, aa.get(i));
478	+	aa.setRelease(i, -3);
479	+	assertEquals(-3, aa.get(i));
480	+	}
481	+	}
482	+
483	+	/**
484	+	* compareAndExchange succeeds in changing value if equal to
485	+	* expected else fails
486	+	*/
487	+	public void testCompareAndExchange() {
488	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
489	+	for (int i = 0; i < SIZE; i++) {
490	+	aa.set(i, 1);
491	+	assertEquals(1, aa.compareAndExchange(i, 1, 2));
492	+	assertEquals(2, aa.compareAndExchange(i, 2, -4));
493	+	assertEquals(-4, aa.get(i));
494	+	assertEquals(-4, aa.compareAndExchange(i,-5, 7));
495	+	assertEquals(-4, aa.get(i));
496	+	assertEquals(-4, aa.compareAndExchange(i, -4, 7));
497	+	assertEquals(7, aa.get(i));
498	+	}
499	+	}
500	+
501	+	/**
502	+	* compareAndExchangeAcquire succeeds in changing value if equal to
503	+	* expected else fails
504	+	*/
505	+	public void testCompareAndExchangeAcquire() {
506	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
507	+	for (int i = 0; i < SIZE; i++) {
508	+	aa.set(i, 1);
509	+	assertEquals(1, aa.compareAndExchangeAcquire(i, 1, 2));
510	+	assertEquals(2, aa.compareAndExchangeAcquire(i, 2, -4));
511	+	assertEquals(-4, aa.get(i));
512	+	assertEquals(-4, aa.compareAndExchangeAcquire(i,-5, 7));
513	+	assertEquals(-4, aa.get(i));
514	+	assertEquals(-4, aa.compareAndExchangeAcquire(i, -4, 7));
515	+	assertEquals(7, aa.get(i));
516	+	}
517	+	}
518	+
519	+	/**
520	+	* compareAndExchangeRelease succeeds in changing value if equal to
521	+	* expected else fails
522	+	*/
523	+	public void testCompareAndExchangeRelease() {
524	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
525	+	for (int i = 0; i < SIZE; i++) {
526	+	aa.set(i, 1);
527	+	assertEquals(1, aa.compareAndExchangeRelease(i, 1, 2));
528	+	assertEquals(2, aa.compareAndExchangeRelease(i, 2, -4));
529	+	assertEquals(-4, aa.get(i));
530	+	assertEquals(-4, aa.compareAndExchangeRelease(i,-5, 7));
531	+	assertEquals(-4, aa.get(i));
532	+	assertEquals(-4, aa.compareAndExchangeRelease(i, -4, 7));
533	+	assertEquals(7, aa.get(i));
534	+	}
535	+	}
536	+
537	+	/**
538	+	* repeated weakCompareAndSetVolatile succeeds in changing value when equal
539	+	* to expected
540	+	*/
541	+	public void testWeakCompareAndSetVolatile() {
542	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
543	+	for (int i = 0; i < SIZE; i++) {
544	+	aa.set(i, 1);
545	+	do {} while (!aa.weakCompareAndSetVolatile(i, 1, 2));
546	+	do {} while (!aa.weakCompareAndSetVolatile(i, 2, -4));
547	+	assertEquals(-4, aa.get(i));
548	+	do {} while (!aa.weakCompareAndSetVolatile(i, -4, 7));
549	+	assertEquals(7, aa.get(i));
550	+	}
551	+	}
552	+
553	+	/**
554	+	* repeated weakCompareAndSetAcquire succeeds in changing value when equal
555	+	* to expected
556	+	*/
557	+	public void testWeakCompareAndSetAcquire() {
558	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
559	+	for (int i = 0; i < SIZE; i++) {
560	+	aa.set(i, 1);
561	+	do {} while (!aa.weakCompareAndSetAcquire(i, 1, 2));
562	+	do {} while (!aa.weakCompareAndSetAcquire(i, 2, -4));
563	+	assertEquals(-4, aa.get(i));
564	+	do {} while (!aa.weakCompareAndSetAcquire(i, -4, 7));
565	+	assertEquals(7, aa.get(i));
566	+	}
567	+	}
568	+
569	+	/**
570	+	* repeated weakCompareAndSetRelease succeeds in changing value when equal
571	+	* to expected
572	+	*/
573	+	public void testWeakCompareAndSetRelease() {
574	+	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
575	+	for (int i = 0; i < SIZE; i++) {
576	+	aa.set(i, 1);
577	+	do {} while (!aa.weakCompareAndSetRelease(i, 1, 2));
578	+	do {} while (!aa.weakCompareAndSetRelease(i, 2, -4));
579	+	assertEquals(-4, aa.get(i));
580	+	do {} while (!aa.weakCompareAndSetRelease(i, -4, 7));
581	+	assertEquals(7, aa.get(i));
582	+	}
583	+	}
584	+
585		}

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