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Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.20 by jsr166, Fri May 27 20:07:24 2011 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.*;
11		import java.util.concurrent.*;
12	+	import java.util.concurrent.locks.*;
13	+	import java.util.concurrent.atomic.*;
14	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15
16	<	public class CyclicBarrierTest extends JSR166TestCase{
16	>	public class CyclicBarrierTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(CyclicBarrierTest.class);
21	>	return new TestSuite(CyclicBarrierTest.class);
22		}
23
24		private volatile int countAction;
25		private class MyAction implements Runnable {
26		public void run() { ++countAction; }
27		}
28	<
28	>
29		/**
30	<	*
30	>	* Creating with negative parties throws IAE
31		*/
32		public void testConstructor1() {
33		try {
34		new CyclicBarrier(-1, (Runnable)null);
35		shouldThrow();
36	<	} catch(IllegalArgumentException e){}
36	>	} catch (IllegalArgumentException success) {}
37		}
38
39		/**
40	<	*
40	>	* Creating with negative parties and no action throws IAE
41		*/
42		public void testConstructor2() {
43		try {
44		new CyclicBarrier(-1);
45		shouldThrow();
46	<	} catch(IllegalArgumentException e){}
46	>	} catch (IllegalArgumentException success) {}
47		}
48
49		/**
50	<	*
50	>	* getParties returns the number of parties given in constructor
51		*/
52	<	public void testConstructor3() {
52	>	public void testGetParties() {
53		CyclicBarrier b = new CyclicBarrier(2);
54	<	assertEquals(2, b.getParties());
54	>	assertEquals(2, b.getParties());
55		assertEquals(0, b.getNumberWaiting());
56		}
57
58		/**
59	<	*
59	>	* A 1-party barrier triggers after single await
60		*/
61	<	public void testSingleParty() {
62	<	try {
63	<	CyclicBarrier b = new CyclicBarrier(1);
64	<	assertEquals(1, b.getParties());
65	<	assertEquals(0, b.getNumberWaiting());
66	<	b.await();
67	<	b.await();
64	<	assertEquals(0, b.getNumberWaiting());
65	<	}
66	<	catch(Exception e) {
67	<	unexpectedException();
68	<	}
61	>	public void testSingleParty() throws Exception {
62	>	CyclicBarrier b = new CyclicBarrier(1);
63	>	assertEquals(1, b.getParties());
64	>	assertEquals(0, b.getNumberWaiting());
65	>	b.await();
66	>	b.await();
67	>	assertEquals(0, b.getNumberWaiting());
68		}
69	<
69	>
70		/**
71	<	*
71	>	* The supplied barrier action is run at barrier
72		*/
73	<	public void testBarrierAction() {
74	<	try {
75	<	countAction = 0;
76	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
77	<	assertEquals(1, b.getParties());
78	<	assertEquals(0, b.getNumberWaiting());
79	<	b.await();
80	<	b.await();
81	<	assertEquals(0, b.getNumberWaiting());
83	<	assertEquals(countAction, 2);
84	<	}
85	<	catch(Exception e) {
86	<	unexpectedException();
87	<	}
73	>	public void testBarrierAction() throws Exception {
74	>	countAction = 0;
75	>	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
76	>	assertEquals(1, b.getParties());
77	>	assertEquals(0, b.getNumberWaiting());
78	>	b.await();
79	>	b.await();
80	>	assertEquals(0, b.getNumberWaiting());
81	>	assertEquals(countAction, 2);
82		}
83
90	–
84		/**
85	<	*
85	>	* A 2-party/thread barrier triggers after both threads invoke await
86		*/
87	<	public void testTwoParties() {
87	>	public void testTwoParties() throws Exception {
88		final CyclicBarrier b = new CyclicBarrier(2);
89	<	Thread t = new Thread(new Runnable() {
90	<	public void run() {
91	<	try {
92	<	b.await();
93	<	b.await();
94	<	b.await();
95	<	b.await();
96	<	} catch(Exception e){
97	<	threadUnexpectedException();
98	<	}}});
89	>	Thread t = new Thread(new CheckedRunnable() {
90	>	public void realRun() throws Exception {
91	>	b.await();
92	>	b.await();
93	>	b.await();
94	>	b.await();
95	>	}});
96	>
97	>	t.start();
98	>	b.await();
99	>	b.await();
100	>	b.await();
101	>	b.await();
102	>	t.join();
103	>	}
104
105	<	try {
106	<	t.start();
107	<	b.await();
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	t.join();
112	<	} catch(Exception e){
113	<	unexpectedException();
114	<	}
105	>	/**
106	>	* An interruption in one party causes others waiting in await to
107	>	* throw BrokenBarrierException
108	>	*/
109	>	public void testAwait1_Interrupted_BrokenBarrier() throws Exception {
110	>	final CyclicBarrier c = new CyclicBarrier(3);
111	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
112	>	public void realRun() throws Exception {
113	>	c.await();
114	>	}};
115	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
116	>	public void realRun() throws Exception {
117	>	c.await();
118	>	}};
119	>
120	>	t1.start();
121	>	t2.start();
122	>	delay(SHORT_DELAY_MS);
123	>	t1.interrupt();
124	>	t1.join();
125	>	t2.join();
126		}
127
128	+	/**
129	+	* An interruption in one party causes others waiting in timed await to
130	+	* throw BrokenBarrierException
131	+	*/
132	+	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
133	+	final CyclicBarrier c = new CyclicBarrier(3);
134	+	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
135	+	public void realRun() throws Exception {
136	+	c.await(LONG_DELAY_MS, MILLISECONDS);
137	+	}};
138	+	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
139	+	public void realRun() throws Exception {
140	+	c.await(LONG_DELAY_MS, MILLISECONDS);
141	+	}};
142	+
143	+	t1.start();
144	+	t2.start();
145	+	delay(SHORT_DELAY_MS);
146	+	t1.interrupt();
147	+	t1.join();
148	+	t2.join();
149	+	}
150
151		/**
152	<	*
152	>	* A timeout in timed await throws TimeoutException
153		*/
154	<	public void testAwait1_Interrupted_BrokenBarrier() {
154	>	public void testAwait3_TimeoutException() throws InterruptedException {
155	>	final CyclicBarrier c = new CyclicBarrier(2);
156	>	Thread t = new ThreadShouldThrow(TimeoutException.class) {
157	>	public void realRun() throws Exception {
158	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
159	>	}};
160	>
161	>	t.start();
162	>	t.join();
163	>	}
164	>
165	>	/**
166	>	* A timeout in one party causes others waiting in timed await to
167	>	* throw BrokenBarrierException
168	>	*/
169	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
170		final CyclicBarrier c = new CyclicBarrier(3);
171	<	Thread t1 = new Thread(new Runnable() {
172	<	public void run() {
173	<	try {
174	<	c.await();
175	<	threadShouldThrow();
176	<	} catch(InterruptedException success){}
177	<	catch(Exception b){
178	<	threadFail("should throw IE");
179	<	}
180	<	}
181	<	});
182	<	Thread t2 = new Thread(new Runnable() {
183	<	public void run() {
171	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
172	>	public void realRun() throws Exception {
173	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
174	>	}};
175	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
176	>	public void realRun() throws Exception {
177	>	c.await(MEDIUM_DELAY_MS, MILLISECONDS);
178	>	}};
179	>
180	>	t1.start();
181	>	t2.start();
182	>	t1.join();
183	>	t2.join();
184	>	}
185	>
186	>	/**
187	>	* A timeout in one party causes others waiting in await to
188	>	* throw BrokenBarrierException
189	>	*/
190	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
191	>	final CyclicBarrier c = new CyclicBarrier(3);
192	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
193	>	public void realRun() throws Exception {
194	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
195	>	}};
196	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
197	>	public void realRun() throws Exception {
198	>	c.await();
199	>	}};
200	>
201	>	t1.start();
202	>	t2.start();
203	>	t1.join();
204	>	t2.join();
205	>	}
206	>
207	>	/**
208	>	* A reset of an active barrier causes waiting threads to throw
209	>	* BrokenBarrierException
210	>	*/
211	>	public void testReset_BrokenBarrier() throws InterruptedException {
212	>	final CyclicBarrier c = new CyclicBarrier(3);
213	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
214	>	public void realRun() throws Exception {
215	>	c.await();
216	>	}};
217	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
218	>	public void realRun() throws Exception {
219	>	c.await();
220	>	}};
221	>
222	>	t1.start();
223	>	t2.start();
224	>	delay(SHORT_DELAY_MS);
225	>	c.reset();
226	>	t1.join();
227	>	t2.join();
228	>	}
229	>
230	>	/**
231	>	* A reset before threads enter barrier does not throw
232	>	* BrokenBarrierException
233	>	*/
234	>	public void testReset_NoBrokenBarrier() throws Exception {
235	>	final CyclicBarrier c = new CyclicBarrier(3);
236	>	Thread t1 = new Thread(new CheckedRunnable() {
237	>	public void realRun() throws Exception {
238	>	c.await();
239	>	}});
240	>	Thread t2 = new Thread(new CheckedRunnable() {
241	>	public void realRun() throws Exception {
242	>	c.await();
243	>	}});
244	>
245	>	c.reset();
246	>	t1.start();
247	>	t2.start();
248	>	c.await();
249	>	t1.join();
250	>	t2.join();
251	>	}
252	>
253	>	/**
254	>	* All threads block while a barrier is broken.
255	>	*/
256	>	public void testReset_Leakage() throws InterruptedException {
257	>	final CyclicBarrier c = new CyclicBarrier(2);
258	>	final AtomicBoolean done = new AtomicBoolean();
259	>	Thread t = new Thread(new CheckedRunnable() {
260	>	public void realRun() {
261	>	while (!done.get()) {
262		try {
263	+	while (c.isBroken())
264	+	c.reset();
265	+
266		c.await();
267	<	threadShouldThrow();
141	<	} catch(BrokenBarrierException success){
142	<	} catch(Exception i){
143	<	threadFail("should throw BBE");
267	>	shouldThrow();
268		}
269	<	}
270	<	});
271	<	try {
269	>	catch (BrokenBarrierException ok) {}
270	>	catch (InterruptedException ok) {}
271	>	}}});
272	>
273	>	t.start();
274	>	for (int i = 0; i < 4; i++) {
275	>	delay(timeoutMillis());
276	>	t.interrupt();
277	>	}
278	>	done.set(true);
279	>	t.interrupt();
280	>	awaitTermination(t);
281	>	}
282	>
283	>	/**
284	>	* Reset of a non-broken barrier does not break barrier
285	>	*/
286	>	public void testResetWithoutBreakage() throws Exception {
287	>	final CyclicBarrier start = new CyclicBarrier(3);
288	>	final CyclicBarrier barrier = new CyclicBarrier(3);
289	>	for (int i = 0; i < 3; i++) {
290	>	Thread t1 = new Thread(new CheckedRunnable() {
291	>	public void realRun() throws Exception {
292	>	start.await();
293	>	barrier.await();
294	>	}});
295	>
296	>	Thread t2 = new Thread(new CheckedRunnable() {
297	>	public void realRun() throws Exception {
298	>	start.await();
299	>	barrier.await();
300	>	}});
301	>
302		t1.start();
303		t2.start();
304	<	Thread.sleep(SHORT_DELAY_MS);
305	<	t1.interrupt();
306	<	t1.join();
304	>	start.await();
305	>	barrier.await();
306	>	t1.join();
307		t2.join();
308	<	} catch(InterruptedException e){
309	<	unexpectedException();
308	>	assertFalse(barrier.isBroken());
309	>	assertEquals(0, barrier.getNumberWaiting());
310	>	if (i == 1) barrier.reset();
311	>	assertFalse(barrier.isBroken());
312	>	assertEquals(0, barrier.getNumberWaiting());
313		}
314		}
315
316		/**
317	<	*
317	>	* Reset of a barrier after interruption reinitializes it.
318		*/
319	<	public void testAwait2_Interrupted_BrokenBarrier() {
320	<	final CyclicBarrier c = new CyclicBarrier(3);
321	<	Thread t1 = new Thread(new Runnable() {
322	<	public void run() {
323	<	try {
324	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
325	<	threadShouldThrow();
326	<	} catch(InterruptedException success){
327	<	} catch(Exception b){
328	<	threadFail("should throw IE");
329	<	}
330	<	}
331	<	});
332	<	Thread t2 = new Thread(new Runnable() {
333	<	public void run() {
334	<	try {
178	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
179	<	threadShouldThrow();
180	<	} catch(BrokenBarrierException success){
181	<	} catch(Exception i){
182	<	threadFail("should throw BBE");
183	<	}
184	<	}
185	<	});
186	<	try {
319	>	public void testResetAfterInterrupt() throws Exception {
320	>	final CyclicBarrier start = new CyclicBarrier(3);
321	>	final CyclicBarrier barrier = new CyclicBarrier(3);
322	>	for (int i = 0; i < 2; i++) {
323	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
324	>	public void realRun() throws Exception {
325	>	start.await();
326	>	barrier.await();
327	>	}};
328	>
329	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
330	>	public void realRun() throws Exception {
331	>	start.await();
332	>	barrier.await();
333	>	}};
334	>
335		t1.start();
336		t2.start();
337	<	Thread.sleep(SHORT_DELAY_MS);
337	>	start.await();
338		t1.interrupt();
339	<	t1.join();
339	>	t1.join();
340		t2.join();
341	<	} catch(InterruptedException e){
342	<	unexpectedException();
341	>	assertTrue(barrier.isBroken());
342	>	assertEquals(0, barrier.getNumberWaiting());
343	>	barrier.reset();
344	>	assertFalse(barrier.isBroken());
345	>	assertEquals(0, barrier.getNumberWaiting());
346		}
347		}
348	<
348	>
349		/**
350	<	*
350	>	* Reset of a barrier after timeout reinitializes it.
351		*/
352	<	public void testAwait3_TimeOutException() {
353	<	final CyclicBarrier c = new CyclicBarrier(2);
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	try {
357	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
358	<	threadShouldThrow();
359	<	} catch(TimeoutException success){
360	<	} catch(Exception b){
361	<	threadFail("should throw TOE");
362	<
363	<	}
364	<	}
365	<	});
366	<	try {
367	<	t.start();
368	<	t.join();
369	<	} catch(InterruptedException e){
370	<	unexpectedException();
352	>	public void testResetAfterTimeout() throws Exception {
353	>	final CyclicBarrier start = new CyclicBarrier(2);
354	>	final CyclicBarrier barrier = new CyclicBarrier(3);
355	>	for (int i = 0; i < 2; i++) {
356	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
357	>	public void realRun() throws Exception {
358	>	start.await();
359	>	barrier.await(SHORT_DELAY_MS, MILLISECONDS);
360	>	}};
361	>
362	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
363	>	public void realRun() throws Exception {
364	>	start.await();
365	>	barrier.await();
366	>	}};
367	>
368	>	t1.start();
369	>	t2.start();
370	>	t1.join();
371	>	t2.join();
372	>	assertTrue(barrier.isBroken());
373	>	assertEquals(0, barrier.getNumberWaiting());
374	>	barrier.reset();
375	>	assertFalse(barrier.isBroken());
376	>	assertEquals(0, barrier.getNumberWaiting());
377	>	}
378	>	}
379	>
380	>	/**
381	>	* Reset of a barrier after a failed command reinitializes it.
382	>	*/
383	>	public void testResetAfterCommandException() throws Exception {
384	>	final CyclicBarrier start = new CyclicBarrier(3);
385	>	final CyclicBarrier barrier =
386	>	new CyclicBarrier(3, new Runnable() {
387	>	public void run() {
388	>	throw new NullPointerException(); }});
389	>	for (int i = 0; i < 2; i++) {
390	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
391	>	public void realRun() throws Exception {
392	>	start.await();
393	>	barrier.await();
394	>	}};
395	>
396	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
397	>	public void realRun() throws Exception {
398	>	start.await();
399	>	barrier.await();
400	>	}};
401	>
402	>	t1.start();
403	>	t2.start();
404	>	start.await();
405	>	while (barrier.getNumberWaiting() < 2) { Thread.yield(); }
406	>	try {
407	>	barrier.await();
408	>	shouldThrow();
409	>	} catch (NullPointerException success) {}
410	>	t1.join();
411	>	t2.join();
412	>	assertTrue(barrier.isBroken());
413	>	assertEquals(0, barrier.getNumberWaiting());
414	>	barrier.reset();
415	>	assertFalse(barrier.isBroken());
416	>	assertEquals(0, barrier.getNumberWaiting());
417		}
418		}
222	–
419		}

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