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Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.14 by jsr166, Sat Nov 21 06:26:00 2009 UTC vs.
Revision 1.30 by jsr166, Sun Jan 7 23:11:07 2018 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.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
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 java.util.concurrent.atomic.AtomicInteger;
17	+
18	+	import junit.framework.Test;
19	+	import junit.framework.TestSuite;
20	+
21		public class CyclicBarrierTest extends JSR166TestCase {
22		public static void main(String[] args) {
23	<	junit.textui.TestRunner.run (suite());
23	>	main(suite(), args);
24		}
25		public static Test suite() {
26		return new TestSuite(CyclicBarrierTest.class);
27		}
28
29	<	private volatile int countAction;
30	<	private class MyAction implements Runnable {
31	<	public void run() { ++countAction; }
29	>	/**
30	>	* Spin-waits till the number of waiters == numberOfWaiters.
31	>	*/
32	>	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
33	>	long startTime = System.nanoTime();
34	>	while (barrier.getNumberWaiting() != numberOfWaiters) {
35	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
36	>	fail("timed out");
37	>	Thread.yield();
38	>	}
39		}
40
41		/**
42	<	* Creating with negative parties throws IAE
42	>	* Creating with negative parties throws IllegalArgumentException
43		*/
44		public void testConstructor1() {
45		try {
#	Line 37 | Line 49 | public class CyclicBarrierTest extends J
49		}
50
51		/**
52	<	* Creating with negative parties and no action throws IAE
52	>	* Creating with negative parties and no action throws
53	>	* IllegalArgumentException
54		*/
55		public void testConstructor2() {
56		try {
#	Line 71 | Line 84 | public class CyclicBarrierTest extends J
84		* The supplied barrier action is run at barrier
85		*/
86		public void testBarrierAction() throws Exception {
87	<	countAction = 0;
88	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
87	>	final AtomicInteger count = new AtomicInteger(0);
88	>	final Runnable incCount = new Runnable() { public void run() {
89	>	count.getAndIncrement(); }};
90	>	CyclicBarrier b = new CyclicBarrier(1, incCount);
91		assertEquals(1, b.getParties());
92		assertEquals(0, b.getNumberWaiting());
93		b.await();
94		b.await();
95		assertEquals(0, b.getNumberWaiting());
96	<	assertEquals(countAction, 2);
96	>	assertEquals(2, count.get());
97		}
98
99		/**
#	Line 86 | Line 101 | public class CyclicBarrierTest extends J
101		*/
102		public void testTwoParties() throws Exception {
103		final CyclicBarrier b = new CyclicBarrier(2);
104	<	Thread t = new Thread(new CheckedRunnable() {
104	>	Thread t = newStartedThread(new CheckedRunnable() {
105		public void realRun() throws Exception {
106		b.await();
107		b.await();
#	Line 94 | Line 109 | public class CyclicBarrierTest extends J
109		b.await();
110		}});
111
97	–	t.start();
112		b.await();
113		b.await();
114		b.await();
115		b.await();
116	<	t.join();
116	>	awaitTermination(t);
117		}
118
105	–
119		/**
120		* An interruption in one party causes others waiting in await to
121		* throw BrokenBarrierException
122		*/
123	<	public void testAwait1_Interrupted_BrokenBarrier() throws Exception {
123	>	public void testAwait1_Interrupted_BrokenBarrier() {
124		final CyclicBarrier c = new CyclicBarrier(3);
125	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
126		Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
127		public void realRun() throws Exception {
128	+	pleaseInterrupt.countDown();
129		c.await();
130		}};
131		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
132		public void realRun() throws Exception {
133	+	pleaseInterrupt.countDown();
134		c.await();
135		}};
136
137		t1.start();
138		t2.start();
139	<	Thread.sleep(SHORT_DELAY_MS);
139	>	await(pleaseInterrupt);
140		t1.interrupt();
141	<	t1.join();
142	<	t2.join();
141	>	awaitTermination(t1);
142	>	awaitTermination(t2);
143		}
144
145		/**
#	Line 132 | Line 148 | public class CyclicBarrierTest extends J
148		*/
149		public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
150		final CyclicBarrier c = new CyclicBarrier(3);
151	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
152		Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
153		public void realRun() throws Exception {
154	+	pleaseInterrupt.countDown();
155		c.await(LONG_DELAY_MS, MILLISECONDS);
156		}};
157		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
158		public void realRun() throws Exception {
159	+	pleaseInterrupt.countDown();
160		c.await(LONG_DELAY_MS, MILLISECONDS);
161		}};
162
163		t1.start();
164		t2.start();
165	<	Thread.sleep(SHORT_DELAY_MS);
165	>	await(pleaseInterrupt);
166		t1.interrupt();
167	<	t1.join();
168	<	t2.join();
167	>	awaitTermination(t1);
168	>	awaitTermination(t2);
169		}
170
171		/**
172		* A timeout in timed await throws TimeoutException
173		*/
174	<	public void testAwait3_TimeOutException() throws InterruptedException {
174	>	public void testAwait3_TimeoutException() throws InterruptedException {
175		final CyclicBarrier c = new CyclicBarrier(2);
176	<	Thread t = new ThreadShouldThrow(TimeoutException.class) {
176	>	Thread t = newStartedThread(new CheckedRunnable() {
177		public void realRun() throws Exception {
178	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
179	<	}};
178	>	long startTime = System.nanoTime();
179	>	try {
180	>	c.await(timeoutMillis(), MILLISECONDS);
181	>	shouldThrow();
182	>	} catch (TimeoutException success) {}
183	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
184	>	}});
185
186	<	t.start();
163	<	t.join();
186	>	awaitTermination(t);
187		}
188
189		/**
#	Line 169 | Line 192 | public class CyclicBarrierTest extends J
192		*/
193		public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
194		final CyclicBarrier c = new CyclicBarrier(3);
195	<	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
195	>	Thread t1 = newStartedThread(new CheckedRunnable() {
196		public void realRun() throws Exception {
197	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
198	<	}};
199	<	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
197	>	try {
198	>	c.await(LONG_DELAY_MS, MILLISECONDS);
199	>	shouldThrow();
200	>	} catch (BrokenBarrierException success) {}
201	>	}});
202	>	Thread t2 = newStartedThread(new CheckedRunnable() {
203		public void realRun() throws Exception {
204	<	c.await(MEDIUM_DELAY_MS, MILLISECONDS);
205	<	}};
204	>	awaitNumberWaiting(c, 1);
205	>	long startTime = System.nanoTime();
206	>	try {
207	>	c.await(timeoutMillis(), MILLISECONDS);
208	>	shouldThrow();
209	>	} catch (TimeoutException success) {}
210	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
211	>	}});
212
213	<	t1.start();
214	<	t2.start();
183	<	t1.join();
184	<	t2.join();
213	>	awaitTermination(t1);
214	>	awaitTermination(t2);
215		}
216
217		/**
#	Line 190 | Line 220 | public class CyclicBarrierTest extends J
220		*/
221		public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
222		final CyclicBarrier c = new CyclicBarrier(3);
223	<	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
223	>	Thread t1 = newStartedThread(new CheckedRunnable() {
224		public void realRun() throws Exception {
225	<	c.await(SHORT_DELAY_MS, MILLISECONDS);
226	<	}};
227	<	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
225	>	try {
226	>	c.await();
227	>	shouldThrow();
228	>	} catch (BrokenBarrierException success) {}
229	>	}});
230	>	Thread t2 = newStartedThread(new CheckedRunnable() {
231		public void realRun() throws Exception {
232	<	c.await();
233	<	}};
232	>	awaitNumberWaiting(c, 1);
233	>	long startTime = System.nanoTime();
234	>	try {
235	>	c.await(timeoutMillis(), MILLISECONDS);
236	>	shouldThrow();
237	>	} catch (TimeoutException success) {}
238	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
239	>	}});
240
241	<	t1.start();
242	<	t2.start();
204	<	t1.join();
205	<	t2.join();
241	>	awaitTermination(t1);
242	>	awaitTermination(t2);
243		}
244
245		/**
#	Line 211 | Line 248 | public class CyclicBarrierTest extends J
248		*/
249		public void testReset_BrokenBarrier() throws InterruptedException {
250		final CyclicBarrier c = new CyclicBarrier(3);
251	+	final CountDownLatch pleaseReset = new CountDownLatch(2);
252		Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
253		public void realRun() throws Exception {
254	+	pleaseReset.countDown();
255		c.await();
256		}};
257		Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
258		public void realRun() throws Exception {
259	+	pleaseReset.countDown();
260		c.await();
261		}};
262
263		t1.start();
264		t2.start();
265	<	Thread.sleep(SHORT_DELAY_MS);
265	>	await(pleaseReset);
266	>
267	>	awaitNumberWaiting(c, 2);
268		c.reset();
269	<	t1.join();
270	<	t2.join();
269	>	awaitTermination(t1);
270	>	awaitTermination(t2);
271		}
272
273		/**
#	Line 234 | Line 276 | public class CyclicBarrierTest extends J
276		*/
277		public void testReset_NoBrokenBarrier() throws Exception {
278		final CyclicBarrier c = new CyclicBarrier(3);
279	<	Thread t1 = new Thread(new CheckedRunnable() {
279	>	c.reset();
280	>
281	>	Thread t1 = newStartedThread(new CheckedRunnable() {
282		public void realRun() throws Exception {
283		c.await();
284		}});
285	<	Thread t2 = new Thread(new CheckedRunnable() {
285	>	Thread t2 = newStartedThread(new CheckedRunnable() {
286		public void realRun() throws Exception {
287		c.await();
288		}});
289
246	–	c.reset();
247	–	t1.start();
248	–	t2.start();
290		c.await();
291	<	t1.join();
292	<	t2.join();
291	>	awaitTermination(t1);
292	>	awaitTermination(t2);
293		}
294
295		/**
#	Line 257 | Line 298 | public class CyclicBarrierTest extends J
298		public void testReset_Leakage() throws InterruptedException {
299		final CyclicBarrier c = new CyclicBarrier(2);
300		final AtomicBoolean done = new AtomicBoolean();
301	<	Thread t = new Thread() {
302	<	public void run() {
303	<	while (!done.get()) {
304	<	try {
305	<	while (c.isBroken())
306	<	c.reset();
307	<
308	<	c.await();
309	<	threadFail("await should not return");
269	<	}
270	<	catch (BrokenBarrierException e) {
271	<	}
272	<	catch (InterruptedException ie) {
273	<	}
301	>	Thread t = newStartedThread(new CheckedRunnable() {
302	>	public void realRun() {
303	>	while (!done.get()) {
304	>	try {
305	>	while (c.isBroken())
306	>	c.reset();
307	>
308	>	c.await();
309	>	shouldThrow();
310		}
311	<	}
312	<	};
311	>	catch (BrokenBarrierException | 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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