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Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.33 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.*;
11	<	import java.io.*;
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicLongArray;
11	>
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	<	junit.textui.TestRunner.run (suite());
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		/**
24	<	*
24	>	* constructor creates array of given size with all elements zero
25		*/
26	<	public void testConstructor(){
27	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
28	<	for (int i = 0; i < SIZE; ++i)
29	<	assertEquals(0,ai.get(i));
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	<	*
33	>	* constructor with null array throws NPE
34		*/
35	<	public void testGetSet(){
36	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
37	<	for (int i = 0; i < SIZE; ++i) {
38	<	ai.set(i, 1);
39	<	assertEquals(1,ai.get(i));
40	<	ai.set(i, 2);
41	<	assertEquals(2,ai.get(i));
42	<	ai.set(i, -3);
43	<	assertEquals(-3,ai.get(i));
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	<	*
280	>	* addAndGet adds given value to current, and returns current value
281		*/
282	<	public void testCompareAndSet(){
283	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
284	<	for (int i = 0; i < SIZE; ++i) {
285	<	ai.set(i, 1);
286	<	assertTrue(ai.compareAndSet(i, 1,2));
287	<	assertTrue(ai.compareAndSet(i, 2,-4));
288	<	assertEquals(-4,ai.get(i));
289	<	assertFalse(ai.compareAndSet(i, -5,7));
55	<	assertFalse((7 == ai.get(i)));
56	<	assertTrue(ai.compareAndSet(i, -4,7));
57	<	assertEquals(7,ai.get(i));
282	>	public void testAddAndGet() {
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		/**
294	<	*
294	>	* decrementAndGet decrements and returns current value
295		*/
296	<	public void testWeakCompareAndSet(){
297	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
298	<	for (int i = 0; i < SIZE; ++i) {
299	<	ai.set(i, 1);
300	<	while(!ai.weakCompareAndSet(i, 1,2));
301	<	while(!ai.weakCompareAndSet(i, 2,-4));
302	<	assertEquals(-4,ai.get(i));
303	<	while(!ai.weakCompareAndSet(i, -4,7));
72	<	assertEquals(7,ai.get(i));
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	<	*
308	>	* incrementAndGet increments and returns current value
309		*/
310	<	public void testGetAndSet(){
311	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
312	<	for (int i = 0; i < SIZE; ++i) {
313	<	ai.set(i, 1);
314	<	assertEquals(1,ai.getAndSet(i,0));
315	<	assertEquals(0,ai.getAndSet(i,-10));
316	<	assertEquals(-10,ai.getAndSet(i,1));
310	>	public void testIncrementAndGet() {
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	+	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	+	}
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	<	*
367	>	* a deserialized serialized array holds same values
368		*/
369	<	public void testGetAndAdd(){
370	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
371	<	for (int i = 0; i < SIZE; ++i) {
372	<	ai.set(i, 1);
373	<	assertEquals(1,ai.getAndAdd(i,2));
374	<	assertEquals(3,ai.get(i));
375	<	assertEquals(3,ai.getAndAdd(i,-4));
376	<	assertEquals(-1,ai.get(i));
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	<	*
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 testGetAndDecrement(){
396	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
397	<	for (int i = 0; i < SIZE; ++i) {
398	<	ai.set(i, 1);
399	<	assertEquals(1,ai.getAndDecrement(i));
400	<	assertEquals(0,ai.getAndDecrement(i));
401	<	assertEquals(-1,ai.getAndDecrement(i));
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	<	*
408	>	* getOpaque returns the last value set
409		*/
410	<	public void testGetAndIncrement(){
411	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
412	<	for (int i = 0; i < SIZE; ++i) {
413	<	ai.set(i, 1);
414	<	assertEquals(1,ai.getAndIncrement(i));
415	<	assertEquals(2,ai.get(i));
416	<	ai.set(i,-2);
417	<	assertEquals(-2,ai.getAndIncrement(i));
418	<	assertEquals(-1,ai.getAndIncrement(i));
128	<	assertEquals(0,ai.getAndIncrement(i));
129	<	assertEquals(1,ai.get(i));
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	<	*
423	>	* getAcquire returns the last value set
424		*/
425	<	public void testAddAndGet() {
426	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
427	<	for (int i = 0; i < SIZE; ++i) {
428	<	ai.set(i, 1);
429	<	assertEquals(3,ai.addAndGet(i,2));
430	<	assertEquals(3,ai.get(i));
431	<	assertEquals(-1,ai.addAndGet(i,-4));
432	<	assertEquals(-1,ai.get(i));
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	<	*
438	>	* get returns the last value setPlain
439		*/
440	<	public void testDecrementAndGet(){
441	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
442	<	for (int i = 0; i < SIZE; ++i) {
443	<	ai.set(i, 1);
444	<	assertEquals(0,ai.decrementAndGet(i));
445	<	assertEquals(-1,ai.decrementAndGet(i));
446	<	assertEquals(-2,ai.decrementAndGet(i));
447	<	assertEquals(-2,ai.get(i));
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	<	*
453	>	* get returns the last value setOpaque
454		*/
455	<	public void testIncrementAndGet() {
456	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
457	<	for (int i = 0; i < SIZE; ++i) {
458	<	ai.set(i, 1);
459	<	assertEquals(2,ai.incrementAndGet(i));
460	<	assertEquals(2,ai.get(i));
461	<	ai.set(i, -2);
462	<	assertEquals(-1,ai.incrementAndGet(i));
463	<	assertEquals(0,ai.incrementAndGet(i));
173	<	assertEquals(1,ai.incrementAndGet(i));
174	<	assertEquals(1,ai.get(i));
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	<	static final long COUNTDOWN = 100000;
468	<
469	<	class Counter implements Runnable {
470	<	final AtomicLongArray ai;
471	<	volatile long counts;
472	<	Counter(AtomicLongArray a) { ai = a; }
473	<	public void run() {
474	<	for (;;) {
475	<	boolean done = true;
476	<	for (int i = 0; i < ai.length(); ++i) {
477	<	long v = ai.get(i);
478	<	threadAssertTrue(v >= 0);
190	<	if (v != 0) {
191	<	done = false;
192	<	if (ai.compareAndSet(i, v, v-1))
193	<	++counts;
194	<	}
195	<	}
196	<	if (done)
197	<	break;
198	<	}
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	<	*
483	>	* compareAndExchange succeeds in changing value if equal to
484	>	* expected else fails
485		*/
486	<	public void testCountingInMultipleThreads() {
487	<	try {
488	<	final AtomicLongArray ai = new AtomicLongArray(SIZE);
489	<	for (int i = 0; i < SIZE; ++i)
490	<	ai.set(i, COUNTDOWN);
491	<	Counter c1 = new Counter(ai);
492	<	Counter c2 = new Counter(ai);
493	<	Thread t1 = new Thread(c1);
494	<	Thread t2 = new Thread(c2);
495	<	t1.start();
496	<	t2.start();
216	<	t1.join();
217	<	t2.join();
218	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
219	<	}
220	<	catch(InterruptedException ie) {
221	<	unexpectedException();
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	<	*
502	<	*/
503	<	public void testSerialization() {
504	<	AtomicLongArray l = new AtomicLongArray(SIZE);
505	<	for (int i = 0; i < SIZE; ++i)
506	<	l.set(i, -i);
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	<	try {
519	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
520	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
521	<	out.writeObject(l);
522	<	out.close();
523	<
524	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
525	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
526	<	AtomicLongArray r = (AtomicLongArray) in.readObject();
527	<	for (int i = 0; i < SIZE; ++i) {
528	<	assertEquals(l.get(i), r.get(i));
529	<	}
530	<	} catch(Exception e){
531	<	unexpectedException();
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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