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Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.34 by jsr166, Fri Jun 17 01:38:28 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.*;
10	<	import java.io.*;
11	<
12	<	public class AtomicLongArrayTest extends TestCase
13	<	{
14	<	static final int N = 10;
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicLongArray;
11
12	<	public static void main (String[] args) {
13	<	junit.textui.TestRunner.run (suite());
12	>	import junit.framework.Test;
13	>	import junit.framework.TestSuite;
14	>
15	>	public class AtomicLongArrayTest extends JSR166TestCase {
16	>	public static void main(String[] args) {
17	>	main(suite(), args);
18		}
19		public static Test suite() {
20		return new TestSuite(AtomicLongArrayTest.class);
21		}
22
23	<	public void testConstructor(){
24	<	AtomicLongArray ai = new AtomicLongArray(N);
25	<	for (int i = 0; i < N; ++i)
26	<	assertEquals(0,ai.get(i));
27	<	}
28	<
29	<	public void testGetSet(){
30	<	AtomicLongArray ai = new AtomicLongArray(N);
31	<	for (int i = 0; i < N; ++i) {
32	<	ai.set(i, 1);
33	<	assertEquals(1,ai.get(i));
34	<	ai.set(i, 2);
35	<	assertEquals(2,ai.get(i));
36	<	ai.set(i, -3);
37	<	assertEquals(-3,ai.get(i));
38	<	}
39	<	}
40	<
41	<	public void testCompareAndSet(){
42	<	AtomicLongArray ai = new AtomicLongArray(N);
43	<	for (int i = 0; i < N; ++i) {
44	<	ai.set(i, 1);
45	<	assertTrue(ai.compareAndSet(i, 1,2));
46	<	assertTrue(ai.compareAndSet(i, 2,-4));
47	<	assertEquals(-4,ai.get(i));
48	<	assertFalse(ai.compareAndSet(i, -5,7));
49	<	assertFalse((7 == ai.get(i)));
50	<	assertTrue(ai.compareAndSet(i, -4,7));
51	<	assertEquals(7,ai.get(i));
52	<	}
53	<	}
54	<
55	<	public void testWeakCompareAndSet(){
56	<	AtomicLongArray ai = new AtomicLongArray(N);
57	<	for (int i = 0; i < N; ++i) {
58	<	ai.set(i, 1);
59	<	while(!ai.weakCompareAndSet(i, 1,2));
60	<	while(!ai.weakCompareAndSet(i, 2,-4));
61	<	assertEquals(-4,ai.get(i));
62	<	while(!ai.weakCompareAndSet(i, -4,7));
63	<	assertEquals(7,ai.get(i));
64	<	}
65	<	}
66	<
67	<	public void testGetAndSet(){
68	<	AtomicLongArray ai = new AtomicLongArray(N);
69	<	for (int i = 0; i < N; ++i) {
70	<	ai.set(i, 1);
71	<	assertEquals(1,ai.getAndSet(i,0));
72	<	assertEquals(0,ai.getAndSet(i,-10));
73	<	assertEquals(-10,ai.getAndSet(i,1));
74	<	}
75	<	}
76	<
77	<	public void testGetAndAdd(){
78	<	AtomicLongArray ai = new AtomicLongArray(N);
79	<	for (int i = 0; i < N; ++i) {
80	<	ai.set(i, 1);
81	<	assertEquals(1,ai.getAndAdd(i,2));
82	<	assertEquals(3,ai.get(i));
83	<	assertEquals(3,ai.getAndAdd(i,-4));
84	<	assertEquals(-1,ai.get(i));
85	<	}
86	<	}
87	<
88	<	public void testGetAndDecrement(){
89	<	AtomicLongArray ai = new AtomicLongArray(N);
90	<	for (int i = 0; i < N; ++i) {
91	<	ai.set(i, 1);
92	<	assertEquals(1,ai.getAndDecrement(i));
93	<	assertEquals(0,ai.getAndDecrement(i));
94	<	assertEquals(-1,ai.getAndDecrement(i));
95	<	}
96	<	}
97	<
98	<	public void testGetAndIncrement(){
99	<	AtomicLongArray ai = new AtomicLongArray(N);
100	<	for (int i = 0; i < N; ++i) {
101	<	ai.set(i, 1);
102	<	assertEquals(1,ai.getAndIncrement(i));
103	<	assertEquals(2,ai.get(i));
104	<	ai.set(i,-2);
105	<	assertEquals(-2,ai.getAndIncrement(i));
106	<	assertEquals(-1,ai.getAndIncrement(i));
107	<	assertEquals(0,ai.getAndIncrement(i));
108	<	assertEquals(1,ai.get(i));
109	<	}
23	>	/**
24	>	* constructor creates array of given size with all elements zero
25	>	*/
26	>	public void testConstructor() {
27	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
28	>	for (int i = 0; i < SIZE; i++)
29	>	assertEquals(0, aa.get(i));
30		}
31
32	+	/**
33	+	* constructor with null array throws NPE
34	+	*/
35	+	public void testConstructor2NPE() {
36	+	try {
37	+	long[] a = null;
38	+	new AtomicLongArray(a);
39	+	shouldThrow();
40	+	} catch (NullPointerException success) {}
41	+	}
42	+
43	+	/**
44	+	* constructor with array is of same size and has all elements
45	+	*/
46	+	public void testConstructor2() {
47	+	long[] a = { 17L, 3L, -42L, 99L, -7L };
48	+	AtomicLongArray aa = new AtomicLongArray(a);
49	+	assertEquals(a.length, aa.length());
50	+	for (int i = 0; i < a.length; i++)
51	+	assertEquals(a[i], aa.get(i));
52	+	}
53	+
54	+	/**
55	+	* get and set for out of bound indices throw IndexOutOfBoundsException
56	+	*/
57	+	public void testIndexing() {
58	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
59	+	for (int index : new int[] { -1, SIZE }) {
60	+	try {
61	+	aa.get(index);
62	+	shouldThrow();
63	+	} catch (IndexOutOfBoundsException success) {}
64	+	try {
65	+	aa.set(index, 1);
66	+	shouldThrow();
67	+	} catch (IndexOutOfBoundsException success) {}
68	+	try {
69	+	aa.lazySet(index, 1);
70	+	shouldThrow();
71	+	} catch (IndexOutOfBoundsException success) {}
72	+	try {
73	+	aa.compareAndSet(index, 1, 2);
74	+	shouldThrow();
75	+	} catch (IndexOutOfBoundsException success) {}
76	+	try {
77	+	aa.weakCompareAndSet(index, 1, 2);
78	+	shouldThrow();
79	+	} catch (IndexOutOfBoundsException success) {}
80	+	try {
81	+	aa.getAndAdd(index, 1);
82	+	shouldThrow();
83	+	} catch (IndexOutOfBoundsException success) {}
84	+	try {
85	+	aa.addAndGet(index, 1);
86	+	shouldThrow();
87	+	} catch (IndexOutOfBoundsException success) {}
88	+	try {
89	+	aa.getPlain(index);
90	+	shouldThrow();
91	+	} catch (IndexOutOfBoundsException success) {}
92	+	try {
93	+	aa.getOpaque(index);
94	+	shouldThrow();
95	+	} catch (IndexOutOfBoundsException success) {}
96	+	try {
97	+	aa.getAcquire(index);
98	+	shouldThrow();
99	+	} catch (IndexOutOfBoundsException success) {}
100	+	try {
101	+	aa.setPlain(index, 1);
102	+	shouldThrow();
103	+	} catch (IndexOutOfBoundsException success) {}
104	+	try {
105	+	aa.setOpaque(index, 1);
106	+	shouldThrow();
107	+	} catch (IndexOutOfBoundsException success) {}
108	+	try {
109	+	aa.setRelease(index, 1);
110	+	shouldThrow();
111	+	} catch (IndexOutOfBoundsException success) {}
112	+	try {
113	+	aa.compareAndExchange(index, 1, 2);
114	+	shouldThrow();
115	+	} catch (IndexOutOfBoundsException success) {}
116	+	try {
117	+	aa.compareAndExchangeAcquire(index, 1, 2);
118	+	shouldThrow();
119	+	} catch (IndexOutOfBoundsException success) {}
120	+	try {
121	+	aa.compareAndExchangeRelease(index, 1, 2);
122	+	shouldThrow();
123	+	} catch (IndexOutOfBoundsException success) {}
124	+	try {
125	+	aa.weakCompareAndSetVolatile(index, 1, 2);
126	+	shouldThrow();
127	+	} catch (IndexOutOfBoundsException success) {}
128	+	try {
129	+	aa.weakCompareAndSetAcquire(index, 1, 2);
130	+	shouldThrow();
131	+	} catch (IndexOutOfBoundsException success) {}
132	+	try {
133	+	aa.weakCompareAndSetRelease(index, 1, 2);
134	+	shouldThrow();
135	+	} catch (IndexOutOfBoundsException success) {}
136	+	}
137	+	}
138	+
139	+	/**
140	+	* get returns the last value set at index
141	+	*/
142	+	public void testGetSet() {
143	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
144	+	for (int i = 0; i < SIZE; i++) {
145	+	aa.set(i, 1);
146	+	assertEquals(1, aa.get(i));
147	+	aa.set(i, 2);
148	+	assertEquals(2, aa.get(i));
149	+	aa.set(i, -3);
150	+	assertEquals(-3, aa.get(i));
151	+	}
152	+	}
153	+
154	+	/**
155	+	* get returns the last value lazySet at index by same thread
156	+	*/
157	+	public void testGetLazySet() {
158	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
159	+	for (int i = 0; i < SIZE; i++) {
160	+	aa.lazySet(i, 1);
161	+	assertEquals(1, aa.get(i));
162	+	aa.lazySet(i, 2);
163	+	assertEquals(2, aa.get(i));
164	+	aa.lazySet(i, -3);
165	+	assertEquals(-3, aa.get(i));
166	+	}
167	+	}
168	+
169	+	/**
170	+	* compareAndSet succeeds in changing value if equal to expected else fails
171	+	*/
172	+	public void testCompareAndSet() {
173	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
174	+	for (int i = 0; i < SIZE; i++) {
175	+	aa.set(i, 1);
176	+	assertTrue(aa.compareAndSet(i, 1, 2));
177	+	assertTrue(aa.compareAndSet(i, 2, -4));
178	+	assertEquals(-4, aa.get(i));
179	+	assertFalse(aa.compareAndSet(i, -5, 7));
180	+	assertEquals(-4, aa.get(i));
181	+	assertTrue(aa.compareAndSet(i, -4, 7));
182	+	assertEquals(7, aa.get(i));
183	+	}
184	+	}
185	+
186	+	/**
187	+	* compareAndSet in one thread enables another waiting for value
188	+	* to succeed
189	+	*/
190	+	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
191	+	final AtomicLongArray a = new AtomicLongArray(1);
192	+	a.set(0, 1);
193	+	Thread t = new Thread(new CheckedRunnable() {
194	+	public void realRun() {
195	+	while (!a.compareAndSet(0, 2, 3))
196	+	Thread.yield();
197	+	}});
198	+
199	+	t.start();
200	+	assertTrue(a.compareAndSet(0, 1, 2));
201	+	t.join(LONG_DELAY_MS);
202	+	assertFalse(t.isAlive());
203	+	assertEquals(3, a.get(0));
204	+	}
205	+
206	+	/**
207	+	* repeated weakCompareAndSet succeeds in changing value when equal
208	+	* to expected
209	+	*/
210	+	public void testWeakCompareAndSet() {
211	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
212	+	for (int i = 0; i < SIZE; i++) {
213	+	aa.set(i, 1);
214	+	do {} while (!aa.weakCompareAndSet(i, 1, 2));
215	+	do {} while (!aa.weakCompareAndSet(i, 2, -4));
216	+	assertEquals(-4, aa.get(i));
217	+	do {} while (!aa.weakCompareAndSet(i, -4, 7));
218	+	assertEquals(7, aa.get(i));
219	+	}
220	+	}
221	+
222	+	/**
223	+	* getAndSet returns previous value and sets to given value at given index
224	+	*/
225	+	public void testGetAndSet() {
226	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
227	+	for (int i = 0; i < SIZE; i++) {
228	+	aa.set(i, 1);
229	+	assertEquals(1, aa.getAndSet(i, 0));
230	+	assertEquals(0, aa.getAndSet(i, -10));
231	+	assertEquals(-10, aa.getAndSet(i, 1));
232	+	}
233	+	}
234	+
235	+	/**
236	+	* getAndAdd returns previous value and adds given value
237	+	*/
238	+	public void testGetAndAdd() {
239	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
240	+	for (int i = 0; i < SIZE; i++) {
241	+	aa.set(i, 1);
242	+	assertEquals(1, aa.getAndAdd(i, 2));
243	+	assertEquals(3, aa.get(i));
244	+	assertEquals(3, aa.getAndAdd(i, -4));
245	+	assertEquals(-1, aa.get(i));
246	+	}
247	+	}
248	+
249	+	/**
250	+	* getAndDecrement returns previous value and decrements
251	+	*/
252	+	public void testGetAndDecrement() {
253	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
254	+	for (int i = 0; i < SIZE; i++) {
255	+	aa.set(i, 1);
256	+	assertEquals(1, aa.getAndDecrement(i));
257	+	assertEquals(0, aa.getAndDecrement(i));
258	+	assertEquals(-1, aa.getAndDecrement(i));
259	+	}
260	+	}
261	+
262	+	/**
263	+	* getAndIncrement returns previous value and increments
264	+	*/
265	+	public void testGetAndIncrement() {
266	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
267	+	for (int i = 0; i < SIZE; i++) {
268	+	aa.set(i, 1);
269	+	assertEquals(1, aa.getAndIncrement(i));
270	+	assertEquals(2, aa.get(i));
271	+	aa.set(i, -2);
272	+	assertEquals(-2, aa.getAndIncrement(i));
273	+	assertEquals(-1, aa.getAndIncrement(i));
274	+	assertEquals(0, aa.getAndIncrement(i));
275	+	assertEquals(1, aa.get(i));
276	+	}
277	+	}
278	+
279	+	/**
280	+	* addAndGet adds given value to current, and returns current value
281	+	*/
282		public void testAddAndGet() {
283	<	AtomicLongArray ai = new AtomicLongArray(N);
284	<	for (int i = 0; i < N; ++i) {
285	<	ai.set(i, 1);
286	<	assertEquals(3,ai.addAndGet(i,2));
287	<	assertEquals(3,ai.get(i));
288	<	assertEquals(-1,ai.addAndGet(i,-4));
289	<	assertEquals(-1,ai.get(i));
283	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
284	>	for (int i = 0; i < SIZE; i++) {
285	>	aa.set(i, 1);
286	>	assertEquals(3, aa.addAndGet(i, 2));
287	>	assertEquals(3, aa.get(i));
288	>	assertEquals(-1, aa.addAndGet(i, -4));
289	>	assertEquals(-1, aa.get(i));
290		}
291		}
292
293	<	public void testDecrementAndGet(){
294	<	AtomicLongArray ai = new AtomicLongArray(N);
295	<	for (int i = 0; i < N; ++i) {
296	<	ai.set(i, 1);
297	<	assertEquals(0,ai.decrementAndGet(i));
298	<	assertEquals(-1,ai.decrementAndGet(i));
299	<	assertEquals(-2,ai.decrementAndGet(i));
300	<	assertEquals(-2,ai.get(i));
293	>	/**
294	>	* decrementAndGet decrements and returns current value
295	>	*/
296	>	public void testDecrementAndGet() {
297	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
298	>	for (int i = 0; i < SIZE; i++) {
299	>	aa.set(i, 1);
300	>	assertEquals(0, aa.decrementAndGet(i));
301	>	assertEquals(-1, aa.decrementAndGet(i));
302	>	assertEquals(-2, aa.decrementAndGet(i));
303	>	assertEquals(-2, aa.get(i));
304		}
305		}
306
307	+	/**
308	+	* incrementAndGet increments and returns current value
309	+	*/
310		public void testIncrementAndGet() {
311	<	AtomicLongArray ai = new AtomicLongArray(N);
312	<	for (int i = 0; i < N; ++i) {
313	<	ai.set(i, 1);
314	<	assertEquals(2,ai.incrementAndGet(i));
315	<	assertEquals(2,ai.get(i));
316	<	ai.set(i, -2);
317	<	assertEquals(-1,ai.incrementAndGet(i));
318	<	assertEquals(0,ai.incrementAndGet(i));
319	<	assertEquals(1,ai.incrementAndGet(i));
320	<	assertEquals(1,ai.get(i));
311	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
312	>	for (int i = 0; i < SIZE; i++) {
313	>	aa.set(i, 1);
314	>	assertEquals(2, aa.incrementAndGet(i));
315	>	assertEquals(2, aa.get(i));
316	>	aa.set(i, -2);
317	>	assertEquals(-1, aa.incrementAndGet(i));
318	>	assertEquals(0, aa.incrementAndGet(i));
319	>	assertEquals(1, aa.incrementAndGet(i));
320	>	assertEquals(1, aa.get(i));
321		}
322		}
323
324	<	public void testSerialization() {
325	<	AtomicLongArray l = new AtomicLongArray(N);
326	<	for (int i = 0; i < N; ++i)
327	<	l.set(i, -i);
328	<
329	<	try {
330	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
331	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
332	<	out.writeObject(l);
333	<	out.close();
334	<
335	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
336	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
337	<	AtomicLongArray r = (AtomicLongArray) in.readObject();
338	<	for (int i = 0; i < N; ++i) {
339	<	assertEquals(l.get(i), r.get(i));
324	>	class Counter extends CheckedRunnable {
325	>	final AtomicLongArray aa;
326	>	volatile long counts;
327	>	Counter(AtomicLongArray a) { aa = a; }
328	>	public void realRun() {
329	>	for (;;) {
330	>	boolean done = true;
331	>	for (int i = 0; i < aa.length(); i++) {
332	>	long v = aa.get(i);
333	>	assertTrue(v >= 0);
334	>	if (v != 0) {
335	>	done = false;
336	>	if (aa.compareAndSet(i, v, v - 1))
337	>	++counts;
338	>	}
339	>	}
340	>	if (done)
341	>	break;
342		}
165	–	} catch(Exception e){
166	–	e.printStackTrace();
167	–	fail("unexpected exception");
343		}
344		}
345
346	+	/**
347	+	* Multiple threads using same array of counters successfully
348	+	* update a number of times equal to total count
349	+	*/
350	+	public void testCountingInMultipleThreads() throws InterruptedException {
351	+	final AtomicLongArray aa = new AtomicLongArray(SIZE);
352	+	long countdown = 10000;
353	+	for (int i = 0; i < SIZE; i++)
354	+	aa.set(i, countdown);
355	+	Counter c1 = new Counter(aa);
356	+	Counter c2 = new Counter(aa);
357	+	Thread t1 = new Thread(c1);
358	+	Thread t2 = new Thread(c2);
359	+	t1.start();
360	+	t2.start();
361	+	t1.join();
362	+	t2.join();
363	+	assertEquals(c1.counts+c2.counts, SIZE * countdown);
364	+	}
365	+
366	+	/**
367	+	* a deserialized serialized array holds same values
368	+	*/
369	+	public void testSerialization() throws Exception {
370	+	AtomicLongArray x = new AtomicLongArray(SIZE);
371	+	for (int i = 0; i < SIZE; i++)
372	+	x.set(i, -i);
373	+	AtomicLongArray y = serialClone(x);
374	+	assertNotSame(x, y);
375	+	assertEquals(x.length(), y.length());
376	+	for (int i = 0; i < SIZE; i++) {
377	+	assertEquals(x.get(i), y.get(i));
378	+	}
379	+	}
380	+
381	+	/**
382	+	* toString returns current value.
383	+	*/
384	+	public void testToString() {
385	+	long[] a = { 17, 3, -42, 99, -7 };
386	+	AtomicLongArray aa = new AtomicLongArray(a);
387	+	assertEquals(Arrays.toString(a), aa.toString());
388	+	}
389	+
390	+	// jdk9
391	+
392	+	/**
393	+	* getPlain returns the last value set
394	+	*/
395	+	public void testGetPlainSet() {
396	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
397	+	for (int i = 0; i < SIZE; i++) {
398	+	aa.set(i, 1);
399	+	assertEquals(1, aa.getPlain(i));
400	+	aa.set(i, 2);
401	+	assertEquals(2, aa.getPlain(i));
402	+	aa.set(i, -3);
403	+	assertEquals(-3, aa.getPlain(i));
404	+	}
405	+	}
406	+
407	+	/**
408	+	* getOpaque returns the last value set
409	+	*/
410	+	public void testGetOpaqueSet() {
411	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
412	+	for (int i = 0; i < SIZE; i++) {
413	+	aa.set(i, 1);
414	+	assertEquals(1, aa.getOpaque(i));
415	+	aa.set(i, 2);
416	+	assertEquals(2, aa.getOpaque(i));
417	+	aa.set(i, -3);
418	+	assertEquals(-3, aa.getOpaque(i));
419	+	}
420	+	}
421	+
422	+	/**
423	+	* getAcquire returns the last value set
424	+	*/
425	+	public void testGetAcquireSet() {
426	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
427	+	for (int i = 0; i < SIZE; i++) {
428	+	aa.set(i, 1);
429	+	assertEquals(1, aa.getAcquire(i));
430	+	aa.set(i, 2);
431	+	assertEquals(2, aa.getAcquire(i));
432	+	aa.set(i, -3);
433	+	assertEquals(-3, aa.getAcquire(i));
434	+	}
435	+	}
436	+
437	+	/**
438	+	* get returns the last value setPlain
439	+	*/
440	+	public void testGetSetPlain() {
441	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
442	+	for (int i = 0; i < SIZE; i++) {
443	+	aa.setPlain(i, 1);
444	+	assertEquals(1, aa.get(i));
445	+	aa.setPlain(i, 2);
446	+	assertEquals(2, aa.get(i));
447	+	aa.setPlain(i, -3);
448	+	assertEquals(-3, aa.get(i));
449	+	}
450	+	}
451	+
452	+	/**
453	+	* get returns the last value setOpaque
454	+	*/
455	+	public void testGetSetOpaque() {
456	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
457	+	for (int i = 0; i < SIZE; i++) {
458	+	aa.setOpaque(i, 1);
459	+	assertEquals(1, aa.get(i));
460	+	aa.setOpaque(i, 2);
461	+	assertEquals(2, aa.get(i));
462	+	aa.setOpaque(i, -3);
463	+	assertEquals(-3, aa.get(i));
464	+	}
465	+	}
466	+
467	+	/**
468	+	* get returns the last value setRelease
469	+	*/
470	+	public void testGetSetRelease() {
471	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
472	+	for (int i = 0; i < SIZE; i++) {
473	+	aa.setRelease(i, 1);
474	+	assertEquals(1, aa.get(i));
475	+	aa.setRelease(i, 2);
476	+	assertEquals(2, aa.get(i));
477	+	aa.setRelease(i, -3);
478	+	assertEquals(-3, aa.get(i));
479	+	}
480	+	}
481	+
482	+	/**
483	+	* compareAndExchange succeeds in changing value if equal to
484	+	* expected else fails
485	+	*/
486	+	public void testCompareAndExchange() {
487	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
488	+	for (int i = 0; i < SIZE; i++) {
489	+	aa.set(i, 1);
490	+	assertEquals(1, aa.compareAndExchange(i, 1, 2));
491	+	assertEquals(2, aa.compareAndExchange(i, 2, -4));
492	+	assertEquals(-4, aa.get(i));
493	+	assertEquals(-4, aa.compareAndExchange(i,-5, 7));
494	+	assertEquals(-4, aa.get(i));
495	+	assertEquals(-4, aa.compareAndExchange(i, -4, 7));
496	+	assertEquals(7, aa.get(i));
497	+	}
498	+	}
499	+
500	+	/**
501	+	* compareAndExchangeAcquire succeeds in changing value if equal to
502	+	* expected else fails
503	+	*/
504	+	public void testCompareAndExchangeAcquire() {
505	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
506	+	for (int i = 0; i < SIZE; i++) {
507	+	aa.set(i, 1);
508	+	assertEquals(1, aa.compareAndExchangeAcquire(i, 1, 2));
509	+	assertEquals(2, aa.compareAndExchangeAcquire(i, 2, -4));
510	+	assertEquals(-4, aa.get(i));
511	+	assertEquals(-4, aa.compareAndExchangeAcquire(i,-5, 7));
512	+	assertEquals(-4, aa.get(i));
513	+	assertEquals(-4, aa.compareAndExchangeAcquire(i, -4, 7));
514	+	assertEquals(7, aa.get(i));
515	+	}
516	+	}
517	+
518	+	/**
519	+	* compareAndExchangeRelease succeeds in changing value if equal to
520	+	* expected else fails
521	+	*/
522	+	public void testCompareAndExchangeRelease() {
523	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
524	+	for (int i = 0; i < SIZE; i++) {
525	+	aa.set(i, 1);
526	+	assertEquals(1, aa.compareAndExchangeRelease(i, 1, 2));
527	+	assertEquals(2, aa.compareAndExchangeRelease(i, 2, -4));
528	+	assertEquals(-4, aa.get(i));
529	+	assertEquals(-4, aa.compareAndExchangeRelease(i,-5, 7));
530	+	assertEquals(-4, aa.get(i));
531	+	assertEquals(-4, aa.compareAndExchangeRelease(i, -4, 7));
532	+	assertEquals(7, aa.get(i));
533	+	}
534	+	}
535	+
536	+	/**
537	+	* repeated weakCompareAndSetVolatile succeeds in changing value when equal
538	+	* to expected
539	+	*/
540	+	public void testWeakCompareAndSetVolatile() {
541	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
542	+	for (int i = 0; i < SIZE; i++) {
543	+	aa.set(i, 1);
544	+	do {} while (!aa.weakCompareAndSetVolatile(i, 1, 2));
545	+	do {} while (!aa.weakCompareAndSetVolatile(i, 2, -4));
546	+	assertEquals(-4, aa.get(i));
547	+	do {} while (!aa.weakCompareAndSetVolatile(i, -4, 7));
548	+	assertEquals(7, aa.get(i));
549	+	}
550	+	}
551	+
552	+	/**
553	+	* repeated weakCompareAndSetAcquire succeeds in changing value when equal
554	+	* to expected
555	+	*/
556	+	public void testWeakCompareAndSetAcquire() {
557	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
558	+	for (int i = 0; i < SIZE; i++) {
559	+	aa.set(i, 1);
560	+	do {} while (!aa.weakCompareAndSetAcquire(i, 1, 2));
561	+	do {} while (!aa.weakCompareAndSetAcquire(i, 2, -4));
562	+	assertEquals(-4, aa.get(i));
563	+	do {} while (!aa.weakCompareAndSetAcquire(i, -4, 7));
564	+	assertEquals(7, aa.get(i));
565	+	}
566	+	}
567	+
568	+	/**
569	+	* repeated weakCompareAndSetRelease succeeds in changing value when equal
570	+	* to expected
571	+	*/
572	+	public void testWeakCompareAndSetRelease() {
573	+	AtomicLongArray aa = new AtomicLongArray(SIZE);
574	+	for (int i = 0; i < SIZE; i++) {
575	+	aa.set(i, 1);
576	+	do {} while (!aa.weakCompareAndSetRelease(i, 1, 2));
577	+	do {} while (!aa.weakCompareAndSetRelease(i, 2, -4));
578	+	assertEquals(-4, aa.get(i));
579	+	do {} while (!aa.weakCompareAndSetRelease(i, -4, 7));
580	+	assertEquals(7, aa.get(i));
581	+	}
582	+	}
583
584		}

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