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root/jsr166/jsr166/src/test/tck/CyclicBarrierTest.java

Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.14 by jsr166, Sat Nov 21 06:26:00 2009 UTC vs.
Revision 1.24 by jsr166, Tue May 31 16:16:23 2011 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
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.*;
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		import static java.util.concurrent.TimeUnit.MILLISECONDS;
17
18		public class CyclicBarrierTest extends JSR166TestCase {
19		public static void main(String[] args) {
20	<	junit.textui.TestRunner.run (suite());
20	>	junit.textui.TestRunner.run(suite());
21		}
22		public static Test suite() {
23		return new TestSuite(CyclicBarrierTest.class);
#	Line 27 | Line 29 | public class CyclicBarrierTest extends J
29		}
30
31		/**
32	+	* Spin-waits till the number of waiters == numberOfWaiters.
33	+	*/
34	+	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
35	+	long startTime = System.nanoTime();
36	+	while (barrier.getNumberWaiting() != numberOfWaiters) {
37	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
38	+	fail("timed out");
39	+	Thread.yield();
40	+	}
41	+	}
42	+
43	+	/**
44		* Creating with negative parties throws IAE
45		*/
46		public void testConstructor1() {
#	Line 86 | Line 100 | public class CyclicBarrierTest extends J
100		*/
101		public void testTwoParties() throws Exception {
102		final CyclicBarrier b = new CyclicBarrier(2);
103	<	Thread t = new Thread(new CheckedRunnable() {
103	>	Thread t = newStartedThread(new CheckedRunnable() {
104		public void realRun() throws Exception {
105		b.await();
106		b.await();
#	Line 94 | Line 108 | public class CyclicBarrierTest extends J
108		b.await();
109		}});
110
97	–	t.start();
111		b.await();
112		b.await();
113		b.await();
114		b.await();
115	<	t.join();
115	>	awaitTermination(t);
116		}
117
105	–
118		/**
119		* An interruption in one party causes others waiting in await to
120		* throw BrokenBarrierException
121		*/
122	<	public void testAwait1_Interrupted_BrokenBarrier() throws Exception {
122	>	public void testAwait1_Interrupted_BrokenBarrier() {
123		final CyclicBarrier c = new CyclicBarrier(3);
124	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
125		Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
126		public void realRun() throws Exception {
127	+	pleaseInterrupt.countDown();
128		c.await();
129		}};
130		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
131		public void realRun() throws Exception {
132	+	pleaseInterrupt.countDown();
133		c.await();
134		}};
135
136		t1.start();
137		t2.start();
138	<	Thread.sleep(SHORT_DELAY_MS);
138	>	await(pleaseInterrupt);
139		t1.interrupt();
140	<	t1.join();
141	<	t2.join();
140	>	awaitTermination(t1);
141	>	awaitTermination(t2);
142		}
143
144		/**
#	Line 132 | Line 147 | public class CyclicBarrierTest extends J
147		*/
148		public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
149		final CyclicBarrier c = new CyclicBarrier(3);
150	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
151		Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
152		public void realRun() throws Exception {
153	+	pleaseInterrupt.countDown();
154		c.await(LONG_DELAY_MS, MILLISECONDS);
155		}};
156		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
157		public void realRun() throws Exception {
158	+	pleaseInterrupt.countDown();
159		c.await(LONG_DELAY_MS, MILLISECONDS);
160		}};
161
162		t1.start();
163		t2.start();
164	<	Thread.sleep(SHORT_DELAY_MS);
164	>	await(pleaseInterrupt);
165		t1.interrupt();
166	<	t1.join();
167	<	t2.join();
166	>	awaitTermination(t1);
167	>	awaitTermination(t2);
168		}
169
170		/**
171		* A timeout in timed await throws TimeoutException
172		*/
173	<	public void testAwait3_TimeOutException() throws InterruptedException {
173	>	public void testAwait3_TimeoutException() throws InterruptedException {
174		final CyclicBarrier c = new CyclicBarrier(2);
175	<	Thread t = new ThreadShouldThrow(TimeoutException.class) {
175	>	Thread t = newStartedThread(new CheckedRunnable() {
176		public void realRun() throws Exception {
177	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
178	<	}};
177	>	long startTime = System.nanoTime();
178	>	try {
179	>	c.await(timeoutMillis(), MILLISECONDS);
180	>	shouldThrow();
181	>	} catch (TimeoutException success) {}
182	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
183	>	}});
184
185	<	t.start();
163	<	t.join();
185	>	awaitTermination(t);
186		}
187
188		/**
#	Line 169 | Line 191 | public class CyclicBarrierTest extends J
191		*/
192		public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
193		final CyclicBarrier c = new CyclicBarrier(3);
194	<	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
194	>	Thread t1 = newStartedThread(new CheckedRunnable() {
195		public void realRun() throws Exception {
196	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
197	<	}};
198	<	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
196	>	try {
197	>	c.await(LONG_DELAY_MS, MILLISECONDS);
198	>	shouldThrow();
199	>	} catch (BrokenBarrierException success) {}
200	>	}});
201	>	Thread t2 = newStartedThread(new CheckedRunnable() {
202		public void realRun() throws Exception {
203	<	c.await(MEDIUM_DELAY_MS, MILLISECONDS);
204	<	}};
203	>	awaitNumberWaiting(c, 1);
204	>	long startTime = System.nanoTime();
205	>	try {
206	>	c.await(timeoutMillis(), MILLISECONDS);
207	>	shouldThrow();
208	>	} catch (TimeoutException success) {}
209	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
210	>	}});
211
212	<	t1.start();
213	<	t2.start();
183	<	t1.join();
184	<	t2.join();
212	>	awaitTermination(t1);
213	>	awaitTermination(t2);
214		}
215
216		/**
#	Line 190 | Line 219 | public class CyclicBarrierTest extends J
219		*/
220		public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
221		final CyclicBarrier c = new CyclicBarrier(3);
222	<	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
222	>	Thread t1 = newStartedThread(new CheckedRunnable() {
223		public void realRun() throws Exception {
224	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
225	<	}};
226	<	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
224	>	try {
225	>	c.await();
226	>	shouldThrow();
227	>	} catch (BrokenBarrierException success) {}
228	>	}});
229	>	Thread t2 = newStartedThread(new CheckedRunnable() {
230		public void realRun() throws Exception {
231	<	c.await();
232	<	}};
231	>	awaitNumberWaiting(c, 1);
232	>	long startTime = System.nanoTime();
233	>	try {
234	>	c.await(timeoutMillis(), MILLISECONDS);
235	>	shouldThrow();
236	>	} catch (TimeoutException success) {}
237	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
238	>	}});
239
240	<	t1.start();
241	<	t2.start();
204	<	t1.join();
205	<	t2.join();
240	>	awaitTermination(t1);
241	>	awaitTermination(t2);
242		}
243
244		/**
#	Line 211 | Line 247 | public class CyclicBarrierTest extends J
247		*/
248		public void testReset_BrokenBarrier() throws InterruptedException {
249		final CyclicBarrier c = new CyclicBarrier(3);
250	+	final CountDownLatch pleaseReset = new CountDownLatch(2);
251		Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
252		public void realRun() throws Exception {
253	+	pleaseReset.countDown();
254		c.await();
255		}};
256		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
257		public void realRun() throws Exception {
258	+	pleaseReset.countDown();
259		c.await();
260		}};
261
262		t1.start();
263		t2.start();
264	<	Thread.sleep(SHORT_DELAY_MS);
264	>	await(pleaseReset);
265	>
266	>	awaitNumberWaiting(c, 2);
267		c.reset();
268	<	t1.join();
269	<	t2.join();
268	>	awaitTermination(t1);
269	>	awaitTermination(t2);
270		}
271
272		/**
#	Line 234 | Line 275 | public class CyclicBarrierTest extends J
275		*/
276		public void testReset_NoBrokenBarrier() throws Exception {
277		final CyclicBarrier c = new CyclicBarrier(3);
278	<	Thread t1 = new Thread(new CheckedRunnable() {
278	>	c.reset();
279	>
280	>	Thread t1 = newStartedThread(new CheckedRunnable() {
281		public void realRun() throws Exception {
282		c.await();
283		}});
284	<	Thread t2 = new Thread(new CheckedRunnable() {
284	>	Thread t2 = newStartedThread(new CheckedRunnable() {
285		public void realRun() throws Exception {
286		c.await();
287		}});
288
246	–	c.reset();
247	–	t1.start();
248	–	t2.start();
289		c.await();
290	<	t1.join();
291	<	t2.join();
290	>	awaitTermination(t1);
291	>	awaitTermination(t2);
292		}
293
294		/**
#	Line 257 | Line 297 | public class CyclicBarrierTest extends J
297		public void testReset_Leakage() throws InterruptedException {
298		final CyclicBarrier c = new CyclicBarrier(2);
299		final AtomicBoolean done = new AtomicBoolean();
300	<	Thread t = new Thread() {
301	<	public void run() {
302	<	while (!done.get()) {
303	<	try {
304	<	while (c.isBroken())
305	<	c.reset();
306	<
307	<	c.await();
308	<	threadFail("await should not return");
269	<	}
270	<	catch (BrokenBarrierException e) {
271	<	}
272	<	catch (InterruptedException ie) {
273	<	}
300	>	Thread t = newStartedThread(new CheckedRunnable() {
301	>	public void realRun() {
302	>	while (!done.get()) {
303	>	try {
304	>	while (c.isBroken())
305	>	c.reset();
306	>
307	>	c.await();
308	>	shouldThrow();
309		}
310	<	}
311	<	};
310	>	catch (BrokenBarrierException ok) {}
311	>	catch (InterruptedException ok) {}
312	>	}}});
313
278	–	t.start();
314		for (int i = 0; i < 4; i++) {
315	<	Thread.sleep(SHORT_DELAY_MS);
315	>	delay(timeoutMillis());
316		t.interrupt();
317		}
318		done.set(true);
319		t.interrupt();
320	<	t.join();
320	>	awaitTermination(t);
321		}
322
323		/**
324		* Reset of a non-broken barrier does not break barrier
325		*/
326		public void testResetWithoutBreakage() throws Exception {
292	–	final CyclicBarrier start = new CyclicBarrier(3);
327		final CyclicBarrier barrier = new CyclicBarrier(3);
328		for (int i = 0; i < 3; i++) {
329	<	Thread t1 = new Thread(new CheckedRunnable() {
329	>	final CyclicBarrier start = new CyclicBarrier(3);
330	>	Thread t1 = newStartedThread(new CheckedRunnable() {
331		public void realRun() throws Exception {
332		start.await();
333		barrier.await();
334		}});
335
336	<	Thread t2 = new Thread(new CheckedRunnable() {
336	>	Thread t2 = newStartedThread(new CheckedRunnable() {
337		public void realRun() throws Exception {
338		start.await();
339		barrier.await();
340		}});
341
307	–	t1.start();
308	–	t2.start();
342		start.await();
343		barrier.await();
344	<	t1.join();
345	<	t2.join();
344	>	awaitTermination(t1);
345	>	awaitTermination(t2);
346		assertFalse(barrier.isBroken());
347		assertEquals(0, barrier.getNumberWaiting());
348		if (i == 1) barrier.reset();
#	Line 322 | Line 355 | public class CyclicBarrierTest extends J
355		* Reset of a barrier after interruption reinitializes it.
356		*/
357		public void testResetAfterInterrupt() throws Exception {
325	–	final CyclicBarrier start = new CyclicBarrier(3);
358		final CyclicBarrier barrier = new CyclicBarrier(3);
359		for (int i = 0; i < 2; i++) {
360	+	final CyclicBarrier start = new CyclicBarrier(3);
361		Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
362		public void realRun() throws Exception {
363		start.await();
#	Line 341 | Line 374 | public class CyclicBarrierTest extends J
374		t2.start();
375		start.await();
376		t1.interrupt();
377	<	t1.join();
378	<	t2.join();
377	>	awaitTermination(t1);
378	>	awaitTermination(t2);
379		assertTrue(barrier.isBroken());
380		assertEquals(0, barrier.getNumberWaiting());
381		barrier.reset();
#	Line 355 | Line 388 | public class CyclicBarrierTest extends J
388		* Reset of a barrier after timeout reinitializes it.
389		*/
390		public void testResetAfterTimeout() throws Exception {
358	–	final CyclicBarrier start = new CyclicBarrier(3);
391		final CyclicBarrier barrier = new CyclicBarrier(3);
392		for (int i = 0; i < 2; i++) {
393	<	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
394	<	public void realRun() throws Exception {
363	<	start.await();
364	<	barrier.await(MEDIUM_DELAY_MS, MILLISECONDS);
365	<	}};
366	<
367	<	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
393	>	assertEquals(0, barrier.getNumberWaiting());
394	>	Thread t1 = newStartedThread(new CheckedRunnable() {
395		public void realRun() throws Exception {
396	<	start.await();
397	<	barrier.await();
398	<	}};
396	>	try {
397	>	barrier.await();
398	>	shouldThrow();
399	>	} catch (BrokenBarrierException success) {}
400	>	}});
401	>	Thread t2 = newStartedThread(new CheckedRunnable() {
402	>	public void realRun() throws Exception {
403	>	awaitNumberWaiting(barrier, 1);
404	>	long startTime = System.nanoTime();
405	>	try {
406	>	barrier.await(timeoutMillis(), MILLISECONDS);
407	>	shouldThrow();
408	>	} catch (TimeoutException success) {}
409	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
410	>	}});
411
412	<	t1.start();
413	<	t2.start();
414	<	start.await();
376	<	t1.join();
377	<	t2.join();
412	>	awaitTermination(t1);
413	>	awaitTermination(t2);
414	>	assertEquals(0, barrier.getNumberWaiting());
415		assertTrue(barrier.isBroken());
416		assertEquals(0, barrier.getNumberWaiting());
417		barrier.reset();
#	Line 383 | Line 420 | public class CyclicBarrierTest extends J
420		}
421		}
422
386	–
423		/**
424		* Reset of a barrier after a failed command reinitializes it.
425		*/
426		public void testResetAfterCommandException() throws Exception {
391	–	final CyclicBarrier start = new CyclicBarrier(3);
427		final CyclicBarrier barrier =
428		new CyclicBarrier(3, new Runnable() {
429		public void run() {
430		throw new NullPointerException(); }});
431		for (int i = 0; i < 2; i++) {
432	+	final CyclicBarrier start = new CyclicBarrier(3);
433		Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
434		public void realRun() throws Exception {
435		start.await();
#	Line 409 | Line 445 | public class CyclicBarrierTest extends J
445		t1.start();
446		t2.start();
447		start.await();
448	<	while (barrier.getNumberWaiting() < 2) { Thread.yield(); }
448	>	awaitNumberWaiting(barrier, 2);
449		try {
450		barrier.await();
451		shouldThrow();
452		} catch (NullPointerException success) {}
453	<	t1.join();
454	<	t2.join();
453	>	awaitTermination(t1);
454	>	awaitTermination(t2);
455		assertTrue(barrier.isBroken());
456		assertEquals(0, barrier.getNumberWaiting());
457		barrier.reset();

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