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Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 2003 UTC vs.
Revision 1.27 by jsr166, Sat Apr 25 04:55:30 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 junit.framework.*;
9	<	import java.util.*;
10	<	import java.util.concurrent.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class CyclicBarrierTest extends TestCase{
12	<
11	>	import java.util.concurrent.BrokenBarrierException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import java.util.concurrent.TimeoutException;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>
17	>	import junit.framework.Test;
18	>	import junit.framework.TestSuite;
19	>
20	>	public class CyclicBarrierTest extends JSR166TestCase {
21		public static void main(String[] args) {
22	<	junit.textui.TestRunner.run (suite());
22	>	main(suite(), args);
23		}
17	–
18	–
24		public static Test suite() {
25	<	return new TestSuite(CyclicBarrierTest.class);
25	>	return new TestSuite(CyclicBarrierTest.class);
26	>	}
27	>
28	>	private volatile int countAction;
29	>	private class MyAction implements Runnable {
30	>	public void run() { ++countAction; }
31	>	}
32	>
33	>	/**
34	>	* Spin-waits till the number of waiters == numberOfWaiters.
35	>	*/
36	>	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
37	>	long startTime = System.nanoTime();
38	>	while (barrier.getNumberWaiting() != numberOfWaiters) {
39	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
40	>	fail("timed out");
41	>	Thread.yield();
42	>	}
43		}
22	–
23	–	private static long SHORT_DELAY_MS = 100;
24	–	private static long MEDIUM_DELAY_MS = 1000;
25	–	private static long LONG_DELAY_MS = 10000;
44
45	<	public void testConstructor1(){
46	<	try{
45	>	/**
46	>	* Creating with negative parties throws IAE
47	>	*/
48	>	public void testConstructor1() {
49	>	try {
50		new CyclicBarrier(-1, (Runnable)null);
51	<	fail("should throw");
52	<	} catch(IllegalArgumentException e){}
51	>	shouldThrow();
52	>	} catch (IllegalArgumentException success) {}
53		}
54
55	<	public void testConstructor2(){
56	<	try{
55	>	/**
56	>	* Creating with negative parties and no action throws IAE
57	>	*/
58	>	public void testConstructor2() {
59	>	try {
60		new CyclicBarrier(-1);
61	<	fail("should throw");
62	<	} catch(IllegalArgumentException e){}
61	>	shouldThrow();
62	>	} catch (IllegalArgumentException success) {}
63		}
64
65	<	public void testConstructor3(){
65	>	/**
66	>	* getParties returns the number of parties given in constructor
67	>	*/
68	>	public void testGetParties() {
69		CyclicBarrier b = new CyclicBarrier(2);
70	<	assertEquals(2, b.getParties());
70	>	assertEquals(2, b.getParties());
71		assertEquals(0, b.getNumberWaiting());
72		}
73
74	<	public void testSingleParty() {
75	<	try {
76	<	CyclicBarrier b = new CyclicBarrier(1);
77	<	assertEquals(1, b.getParties());
78	<	assertEquals(0, b.getNumberWaiting());
79	<	b.await();
80	<	b.await();
81	<	assertEquals(0, b.getNumberWaiting());
82	<	}
83	<	catch(Exception e) {
57	<	fail("unexpected exception");
58	<	}
59	<	}
60	<
61	<	private volatile int countAction;
62	<	private class MyAction implements Runnable {
63	<	public void run() { ++countAction; }
74	>	/**
75	>	* A 1-party barrier triggers after single await
76	>	*/
77	>	public void testSingleParty() throws Exception {
78	>	CyclicBarrier b = new CyclicBarrier(1);
79	>	assertEquals(1, b.getParties());
80	>	assertEquals(0, b.getNumberWaiting());
81	>	b.await();
82	>	b.await();
83	>	assertEquals(0, b.getNumberWaiting());
84		}
85
86	<	public void testBarrierAction() {
87	<	try {
88	<	countAction = 0;
89	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
90	<	assertEquals(1, b.getParties());
91	<	assertEquals(0, b.getNumberWaiting());
92	<	b.await();
93	<	b.await();
94	<	assertEquals(0, b.getNumberWaiting());
95	<	assertEquals(countAction, 2);
96	<	}
97	<	catch(Exception e) {
78	<	fail("unexpected exception");
79	<	}
86	>	/**
87	>	* The supplied barrier action is run at barrier
88	>	*/
89	>	public void testBarrierAction() throws Exception {
90	>	countAction = 0;
91	>	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
92	>	assertEquals(1, b.getParties());
93	>	assertEquals(0, b.getNumberWaiting());
94	>	b.await();
95	>	b.await();
96	>	assertEquals(0, b.getNumberWaiting());
97	>	assertEquals(2, countAction);
98		}
99
100	<
101	<	public void testTwoParties(){
100	>	/**
101	>	* A 2-party/thread barrier triggers after both threads invoke await
102	>	*/
103	>	public void testTwoParties() throws Exception {
104		final CyclicBarrier b = new CyclicBarrier(2);
105	<	Thread t = new Thread(new Runnable() {
106	<	public void run(){
105	>	Thread t = newStartedThread(new CheckedRunnable() {
106	>	public void realRun() throws Exception {
107	>	b.await();
108	>	b.await();
109	>	b.await();
110	>	b.await();
111	>	}});
112	>
113	>	b.await();
114	>	b.await();
115	>	b.await();
116	>	b.await();
117	>	awaitTermination(t);
118	>	}
119	>
120	>	/**
121	>	* An interruption in one party causes others waiting in await to
122	>	* throw BrokenBarrierException
123	>	*/
124	>	public void testAwait1_Interrupted_BrokenBarrier() {
125	>	final CyclicBarrier c = new CyclicBarrier(3);
126	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
127	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
128	>	public void realRun() throws Exception {
129	>	pleaseInterrupt.countDown();
130	>	c.await();
131	>	}};
132	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
133	>	public void realRun() throws Exception {
134	>	pleaseInterrupt.countDown();
135	>	c.await();
136	>	}};
137	>
138	>	t1.start();
139	>	t2.start();
140	>	await(pleaseInterrupt);
141	>	t1.interrupt();
142	>	awaitTermination(t1);
143	>	awaitTermination(t2);
144	>	}
145	>
146	>	/**
147	>	* An interruption in one party causes others waiting in timed await to
148	>	* throw BrokenBarrierException
149	>	*/
150	>	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
151	>	final CyclicBarrier c = new CyclicBarrier(3);
152	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
153	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
154	>	public void realRun() throws Exception {
155	>	pleaseInterrupt.countDown();
156	>	c.await(LONG_DELAY_MS, MILLISECONDS);
157	>	}};
158	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
159	>	public void realRun() throws Exception {
160	>	pleaseInterrupt.countDown();
161	>	c.await(LONG_DELAY_MS, MILLISECONDS);
162	>	}};
163	>
164	>	t1.start();
165	>	t2.start();
166	>	await(pleaseInterrupt);
167	>	t1.interrupt();
168	>	awaitTermination(t1);
169	>	awaitTermination(t2);
170	>	}
171	>
172	>	/**
173	>	* A timeout in timed await throws TimeoutException
174	>	*/
175	>	public void testAwait3_TimeoutException() throws InterruptedException {
176	>	final CyclicBarrier c = new CyclicBarrier(2);
177	>	Thread t = newStartedThread(new CheckedRunnable() {
178	>	public void realRun() throws Exception {
179	>	long startTime = System.nanoTime();
180	>	try {
181	>	c.await(timeoutMillis(), MILLISECONDS);
182	>	shouldThrow();
183	>	} catch (TimeoutException success) {}
184	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
185	>	}});
186	>
187	>	awaitTermination(t);
188	>	}
189	>
190	>	/**
191	>	* A timeout in one party causes others waiting in timed await to
192	>	* throw BrokenBarrierException
193	>	*/
194	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
195	>	final CyclicBarrier c = new CyclicBarrier(3);
196	>	Thread t1 = newStartedThread(new CheckedRunnable() {
197	>	public void realRun() throws Exception {
198	>	try {
199	>	c.await(LONG_DELAY_MS, MILLISECONDS);
200	>	shouldThrow();
201	>	} catch (BrokenBarrierException success) {}
202	>	}});
203	>	Thread t2 = newStartedThread(new CheckedRunnable() {
204	>	public void realRun() throws Exception {
205	>	awaitNumberWaiting(c, 1);
206	>	long startTime = System.nanoTime();
207	>	try {
208	>	c.await(timeoutMillis(), MILLISECONDS);
209	>	shouldThrow();
210	>	} catch (TimeoutException success) {}
211	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
212	>	}});
213	>
214	>	awaitTermination(t1);
215	>	awaitTermination(t2);
216	>	}
217	>
218	>	/**
219	>	* A timeout in one party causes others waiting in await to
220	>	* throw BrokenBarrierException
221	>	*/
222	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
223	>	final CyclicBarrier c = new CyclicBarrier(3);
224	>	Thread t1 = newStartedThread(new CheckedRunnable() {
225	>	public void realRun() throws Exception {
226	>	try {
227	>	c.await();
228	>	shouldThrow();
229	>	} catch (BrokenBarrierException success) {}
230	>	}});
231	>	Thread t2 = newStartedThread(new CheckedRunnable() {
232	>	public void realRun() throws Exception {
233	>	awaitNumberWaiting(c, 1);
234	>	long startTime = System.nanoTime();
235	>	try {
236	>	c.await(timeoutMillis(), MILLISECONDS);
237	>	shouldThrow();
238	>	} catch (TimeoutException success) {}
239	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
240	>	}});
241	>
242	>	awaitTermination(t1);
243	>	awaitTermination(t2);
244	>	}
245	>
246	>	/**
247	>	* A reset of an active barrier causes waiting threads to throw
248	>	* BrokenBarrierException
249	>	*/
250	>	public void testReset_BrokenBarrier() throws InterruptedException {
251	>	final CyclicBarrier c = new CyclicBarrier(3);
252	>	final CountDownLatch pleaseReset = new CountDownLatch(2);
253	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
254	>	public void realRun() throws Exception {
255	>	pleaseReset.countDown();
256	>	c.await();
257	>	}};
258	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
259	>	public void realRun() throws Exception {
260	>	pleaseReset.countDown();
261	>	c.await();
262	>	}};
263	>
264	>	t1.start();
265	>	t2.start();
266	>	await(pleaseReset);
267	>
268	>	awaitNumberWaiting(c, 2);
269	>	c.reset();
270	>	awaitTermination(t1);
271	>	awaitTermination(t2);
272	>	}
273	>
274	>	/**
275	>	* A reset before threads enter barrier does not throw
276	>	* BrokenBarrierException
277	>	*/
278	>	public void testReset_NoBrokenBarrier() throws Exception {
279	>	final CyclicBarrier c = new CyclicBarrier(3);
280	>	c.reset();
281	>
282	>	Thread t1 = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() throws Exception {
284	>	c.await();
285	>	}});
286	>	Thread t2 = newStartedThread(new CheckedRunnable() {
287	>	public void realRun() throws Exception {
288	>	c.await();
289	>	}});
290	>
291	>	c.await();
292	>	awaitTermination(t1);
293	>	awaitTermination(t2);
294	>	}
295	>
296	>	/**
297	>	* All threads block while a barrier is broken.
298	>	*/
299	>	public void testReset_Leakage() throws InterruptedException {
300	>	final CyclicBarrier c = new CyclicBarrier(2);
301	>	final AtomicBoolean done = new AtomicBoolean();
302	>	Thread t = newStartedThread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	while (!done.get()) {
305		try {
306	<	b.await();
307	<	b.await();
90	<	b.await();
91	<	b.await();
92	<	} catch(Exception e){
93	<	fail("unexpected exception");
94	<	}}});
306	>	while (c.isBroken())
307	>	c.reset();
308
309	<	try {
310	<	t.start();
311	<	b.await();
312	<	b.await();
313	<	b.await();
314	<	b.await();
315	<	t.join();
316	<	} catch(Exception e){
317	<	fail("unexpected exception");
309	>	c.await();
310	>	shouldThrow();
311	>	}
312	>	catch (BrokenBarrierException ok) {}
313	>	catch (InterruptedException ok) {}
314	>	}}});
315	>
316	>	for (int i = 0; i < 4; i++) {
317	>	delay(timeoutMillis());
318	>	t.interrupt();
319	>	}
320	>	done.set(true);
321	>	t.interrupt();
322	>	awaitTermination(t);
323	>	}
324	>
325	>	/**
326	>	* Reset of a non-broken barrier does not break barrier
327	>	*/
328	>	public void testResetWithoutBreakage() throws Exception {
329	>	final CyclicBarrier barrier = new CyclicBarrier(3);
330	>	for (int i = 0; i < 3; i++) {
331	>	final CyclicBarrier start = new CyclicBarrier(3);
332	>	Thread t1 = newStartedThread(new CheckedRunnable() {
333	>	public void realRun() throws Exception {
334	>	start.await();
335	>	barrier.await();
336	>	}});
337	>
338	>	Thread t2 = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() throws Exception {
340	>	start.await();
341	>	barrier.await();
342	>	}});
343	>
344	>	start.await();
345	>	barrier.await();
346	>	awaitTermination(t1);
347	>	awaitTermination(t2);
348	>	assertFalse(barrier.isBroken());
349	>	assertEquals(0, barrier.getNumberWaiting());
350	>	if (i == 1) barrier.reset();
351	>	assertFalse(barrier.isBroken());
352	>	assertEquals(0, barrier.getNumberWaiting());
353		}
354		}
355
356	+	/**
357	+	* Reset of a barrier after interruption reinitializes it.
358	+	*/
359	+	public void testResetAfterInterrupt() throws Exception {
360	+	final CyclicBarrier barrier = new CyclicBarrier(3);
361	+	for (int i = 0; i < 2; i++) {
362	+	final CyclicBarrier start = new CyclicBarrier(3);
363	+	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
364	+	public void realRun() throws Exception {
365	+	start.await();
366	+	barrier.await();
367	+	}};
368	+
369	+	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
370	+	public void realRun() throws Exception {
371	+	start.await();
372	+	barrier.await();
373	+	}};
374
109	–	public void testAwait1_Interrupted_BrokenBarrier(){
110	–	final CyclicBarrier c = new CyclicBarrier(3);
111	–	Thread t1 = new Thread(new Runnable() {
112	–	public void run(){
113	–	try{
114	–	c.await();
115	–	fail("should throw");
116	–	} catch(InterruptedException success){}
117	–	catch(Exception b){
118	–	fail("should throw IE");
119	–	}
120	–	}
121	–	});
122	–	Thread t2 = new Thread(new Runnable(){
123	–	public void run(){
124	–	try{
125	–	c.await();
126	–	fail("should throw");
127	–	} catch(BrokenBarrierException success){
128	–	} catch(Exception i){
129	–	fail("should throw BBE");
130	–	}
131	–	}
132	–	});
133	–	try {
375		t1.start();
376		t2.start();
377	<	Thread.sleep(SHORT_DELAY_MS);
377	>	start.await();
378		t1.interrupt();
379	<	t1.join();
380	<	t2.join();
381	<	} catch(InterruptedException e){
382	<	fail("unexpected exception");
379	>	awaitTermination(t1);
380	>	awaitTermination(t2);
381	>	assertTrue(barrier.isBroken());
382	>	assertEquals(0, barrier.getNumberWaiting());
383	>	barrier.reset();
384	>	assertFalse(barrier.isBroken());
385	>	assertEquals(0, barrier.getNumberWaiting());
386		}
387		}
388
389	<	public void testAwait2_Interrupted_BrokenBarrier(){
390	<	final CyclicBarrier c = new CyclicBarrier(3);
391	<	Thread t1 = new Thread(new Runnable() {
392	<	public void run(){
393	<	try{
394	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
395	<	fail("should throw");
396	<	} catch(InterruptedException success){
397	<	} catch(Exception b){
398	<	fail("should throw IE");
399	<	}
400	<	}
401	<	});
402	<	Thread t2 = new Thread(new Runnable(){
403	<	public void run(){
404	<	try{
405	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
406	<	fail("should throw");
407	<	} catch(BrokenBarrierException success){
408	<	} catch(Exception i){
409	<	fail("should throw BBE");
410	<	}
411	<	}
412	<	});
413	<	try {
414	<	t1.start();
415	<	t2.start();
416	<	Thread.sleep(SHORT_DELAY_MS);
417	<	t1.interrupt();
418	<	t1.join();
419	<	t2.join();
420	<	} catch(InterruptedException e){
421	<	fail("unexpected exception");
389	>	/**
390	>	* Reset of a barrier after timeout reinitializes it.
391	>	*/
392	>	public void testResetAfterTimeout() throws Exception {
393	>	final CyclicBarrier barrier = new CyclicBarrier(3);
394	>	for (int i = 0; i < 2; i++) {
395	>	assertEquals(0, barrier.getNumberWaiting());
396	>	Thread t1 = newStartedThread(new CheckedRunnable() {
397	>	public void realRun() throws Exception {
398	>	try {
399	>	barrier.await();
400	>	shouldThrow();
401	>	} catch (BrokenBarrierException success) {}
402	>	}});
403	>	Thread t2 = newStartedThread(new CheckedRunnable() {
404	>	public void realRun() throws Exception {
405	>	awaitNumberWaiting(barrier, 1);
406	>	long startTime = System.nanoTime();
407	>	try {
408	>	barrier.await(timeoutMillis(), MILLISECONDS);
409	>	shouldThrow();
410	>	} catch (TimeoutException success) {}
411	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
412	>	}});
413	>
414	>	awaitTermination(t1);
415	>	awaitTermination(t2);
416	>	assertEquals(0, barrier.getNumberWaiting());
417	>	assertTrue(barrier.isBroken());
418	>	assertEquals(0, barrier.getNumberWaiting());
419	>	barrier.reset();
420	>	assertFalse(barrier.isBroken());
421	>	assertEquals(0, barrier.getNumberWaiting());
422		}
423		}
424	<
425	<	public void testAwait3_TimeOutException(){
426	<	final CyclicBarrier c = new CyclicBarrier(2);
427	<	Thread t = new Thread(new Runnable() {
428	<	public void run(){
429	<	try{
430	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
431	<	fail("should throw");
432	<	} catch(TimeoutException success){
433	<	} catch(Exception b){
434	<	fail("should throw TOE");
435	<
436	<	}
437	<	}
438	<	});
439	<	try {
440	<	t.start();
441	<	t.join();
442	<	} catch(InterruptedException e){
443	<	fail("unexpected exception");
424	>
425	>	/**
426	>	* Reset of a barrier after a failed command reinitializes it.
427	>	*/
428	>	public void testResetAfterCommandException() throws Exception {
429	>	final CyclicBarrier barrier =
430	>	new CyclicBarrier(3, new Runnable() {
431	>	public void run() {
432	>	throw new NullPointerException(); }});
433	>	for (int i = 0; i < 2; i++) {
434	>	final CyclicBarrier start = new CyclicBarrier(3);
435	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
436	>	public void realRun() throws Exception {
437	>	start.await();
438	>	barrier.await();
439	>	}};
440	>
441	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
442	>	public void realRun() throws Exception {
443	>	start.await();
444	>	barrier.await();
445	>	}};
446	>
447	>	t1.start();
448	>	t2.start();
449	>	start.await();
450	>	awaitNumberWaiting(barrier, 2);
451	>	try {
452	>	barrier.await();
453	>	shouldThrow();
454	>	} catch (NullPointerException success) {}
455	>	awaitTermination(t1);
456	>	awaitTermination(t2);
457	>	assertTrue(barrier.isBroken());
458	>	assertEquals(0, barrier.getNumberWaiting());
459	>	barrier.reset();
460	>	assertFalse(barrier.isBroken());
461	>	assertEquals(0, barrier.getNumberWaiting());
462		}
463		}
202	–
464		}

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