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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.26 by dl, Fri Feb 24 00:03:16 2006 UTC vs.
Revision 1.36 by jsr166, Sat Nov 21 02:33:20 2009 UTC

#	Line 2 | Line 2
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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.util.*;
15
16		public class ReentrantReadWriteLockTest 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(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantReadWriteLock lock;
29		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	<	public void run() {
31	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 38 | Line 37 | public class ReentrantReadWriteLockTest
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<	public Collection<Thread> getWaitingThreads(Condition c) {
57	<	return super.getWaitingThreads(c);
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
59		}
60
61		/**
62		* Constructor sets given fairness, and is in unlocked state
63		*/
64	<	public void testConstructor() {
65	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
64	>	public void testConstructor() {
65	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
66		assertFalse(rl.isFair());
67		assertFalse(rl.isWriteLocked());
68		assertEquals(0, rl.getReadLockCount());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
72		assertEquals(0, r2.getReadLockCount());
73	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	+	assertFalse(r3.isFair());
75	+	assertFalse(r3.isWriteLocked());
76	+	assertEquals(0, r3.getReadLockCount());
77		}
78
79		/**
80		* write-locking and read-locking an unlocked lock succeed
81		*/
82	<	public void testLock() {
83	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	>	public void testLock() {
83	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84		rl.writeLock().lock();
85		assertTrue(rl.isWriteLocked());
86		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 105 | Line 105 | public class ReentrantReadWriteLockTest
105		/**
106		* locking an unlocked fair lock succeeds
107		*/
108	<	public void testFairLock() {
109	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	>	public void testFairLock() {
109	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
110		rl.writeLock().lock();
111		assertTrue(rl.isWriteLocked());
112		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 131 | Line 131 | public class ReentrantReadWriteLockTest
131		* getWriteHoldCount returns number of recursive holds
132		*/
133		public void testGetWriteHoldCount() {
134	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	<	for(int i = 1; i <= SIZE; i++) {
136	<	lock.writeLock().lock();
137	<	assertEquals(i,lock.getWriteHoldCount());
138	<	}
139	<	for(int i = SIZE; i > 0; i--) {
140	<	lock.writeLock().unlock();
141	<	assertEquals(i-1,lock.getWriteHoldCount());
142	<	}
134	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	>	for (int i = 1; i <= SIZE; i++) {
136	>	lock.writeLock().lock();
137	>	assertEquals(i,lock.getWriteHoldCount());
138	>	}
139	>	for (int i = SIZE; i > 0; i--) {
140	>	lock.writeLock().unlock();
141	>	assertEquals(i-1,lock.getWriteHoldCount());
142	>	}
143		}
144
145		/**
146		* WriteLock.getHoldCount returns number of recursive holds
147		*/
148		public void testGetHoldCount() {
149	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	for(int i = 1; i <= SIZE; i++) {
151	<	lock.writeLock().lock();
152	<	assertEquals(i,lock.writeLock().getHoldCount());
153	<	}
154	<	for(int i = SIZE; i > 0; i--) {
155	<	lock.writeLock().unlock();
156	<	assertEquals(i-1,lock.writeLock().getHoldCount());
157	<	}
149	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	>	for (int i = 1; i <= SIZE; i++) {
151	>	lock.writeLock().lock();
152	>	assertEquals(i,lock.writeLock().getHoldCount());
153	>	}
154	>	for (int i = SIZE; i > 0; i--) {
155	>	lock.writeLock().unlock();
156	>	assertEquals(i-1,lock.writeLock().getHoldCount());
157	>	}
158		}
159
160		/**
161		* getReadHoldCount returns number of recursive holds
162		*/
163		public void testGetReadHoldCount() {
164	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	for(int i = 1; i <= SIZE; i++) {
166	<	lock.readLock().lock();
167	<	assertEquals(i,lock.getReadHoldCount());
168	<	}
169	<	for(int i = SIZE; i > 0; i--) {
170	<	lock.readLock().unlock();
171	<	assertEquals(i-1,lock.getReadHoldCount());
172	<	}
164	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	>	for (int i = 1; i <= SIZE; i++) {
166	>	lock.readLock().lock();
167	>	assertEquals(i,lock.getReadHoldCount());
168	>	}
169	>	for (int i = SIZE; i > 0; i--) {
170	>	lock.readLock().unlock();
171	>	assertEquals(i-1,lock.getReadHoldCount());
172	>	}
173		}
174	<
174	>
175
176		/**
177		* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testUnlock_IllegalMonitorStateException() {
180	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	<	try {
182	<	rl.writeLock().unlock();
183	<	shouldThrow();
184	<	} catch(IllegalMonitorStateException success){}
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	>	try {
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185		}
186
187
188		/**
189		* write-lockInterruptibly is interruptible
190		*/
191	<	public void testWriteLockInterruptibly_Interrupted() {
192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	<	Thread t = new Thread(new Runnable() {
194	<	public void run() {
195	<	try {
196	<	lock.writeLock().lockInterruptibly();
197	<	lock.writeLock().unlock();
198	<	lock.writeLock().lockInterruptibly();
199	<	lock.writeLock().unlock();
200	<	} catch(InterruptedException success){}
201	<	}
202	<	});
203	<	try {
204	<	lock.writeLock().lock();
205	<	t.start();
206	<	Thread.sleep(SHORT_DELAY_MS);
207	<	t.interrupt();
208	<	lock.writeLock().unlock();
209	<	t.join();
210	<	} catch(Exception e){
211	<	unexpectedException();
212	<	}
213	<	}
191	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
192	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
194	>	public void realRun() throws InterruptedException {
195	>	lock.writeLock().lockInterruptibly();
196	>	lock.writeLock().unlock();
197	>	lock.writeLock().lockInterruptibly();
198	>	lock.writeLock().unlock();
199	>	}});
200	>
201	>	lock.writeLock().lock();
202	>	t.start();
203	>	Thread.sleep(SHORT_DELAY_MS);
204	>	t.interrupt();
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	lock.writeLock().unlock();
207	>	t.join();
208	>	}
209
210		/**
211		* timed write-tryLock is interruptible
212		*/
213	<	public void testWriteTryLock_Interrupted() {
214	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	<	lock.writeLock().lock();
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	try {
219	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
220	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
230	<	t.interrupt();
231	<	lock.writeLock().unlock();
232	<	t.join();
233	<	} catch(Exception e){
234	<	unexpectedException();
235	<	}
213	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
214	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	>	lock.writeLock().lock();
216	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
217	>	public void realRun() throws InterruptedException {
218	>	lock.writeLock().tryLock(1000,MILLISECONDS);
219	>	}});
220	>
221	>	t.start();
222	>	t.interrupt();
223	>	lock.writeLock().unlock();
224	>	t.join();
225		}
226
227		/**
228		* read-lockInterruptibly is interruptible
229		*/
230	<	public void testReadLockInterruptibly_Interrupted() {
231	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	<	lock.writeLock().lock();
233	<	Thread t = new Thread(new Runnable() {
234	<	public void run() {
235	<	try {
236	<	lock.readLock().lockInterruptibly();
237	<	} catch(InterruptedException success){}
238	<	}
239	<	});
240	<	try {
241	<	t.start();
242	<	Thread.sleep(SHORT_DELAY_MS);
243	<	t.interrupt();
244	<	lock.writeLock().unlock();
256	<	t.join();
257	<	} catch(Exception e){
258	<	unexpectedException();
259	<	}
260	<	}
230	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
231	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	>	lock.writeLock().lock();
233	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
234	>	public void realRun() throws InterruptedException {
235	>	lock.readLock().lockInterruptibly();
236	>	}});
237	>
238	>	t.start();
239	>	Thread.sleep(SHORT_DELAY_MS);
240	>	t.interrupt();
241	>	Thread.sleep(SHORT_DELAY_MS);
242	>	lock.writeLock().unlock();
243	>	t.join();
244	>	}
245
246		/**
247		* timed read-tryLock is interruptible
248		*/
249	<	public void testReadTryLock_Interrupted() {
250	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	<	lock.writeLock().lock();
252	<	Thread t = new Thread(new Runnable() {
253	<	public void run() {
254	<	try {
255	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
256	<	threadShouldThrow();
257	<	} catch(InterruptedException success){}
258	<	}
259	<	});
276	<	try {
277	<	t.start();
278	<	t.interrupt();
279	<	t.join();
280	<	} catch(Exception e){
281	<	unexpectedException();
282	<	}
249	>	public void testReadTryLock_Interrupted() throws InterruptedException {
250	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	>	lock.writeLock().lock();
252	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
253	>	public void realRun() throws InterruptedException {
254	>	lock.readLock().tryLock(1000,MILLISECONDS);
255	>	}});
256	>
257	>	t.start();
258	>	t.interrupt();
259	>	t.join();
260		}
261
262	<
262	>
263		/**
264		* write-tryLock fails if locked
265		*/
266	<	public void testWriteTryLockWhenLocked() {
267	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
268	<	lock.writeLock().lock();
269	<	Thread t = new Thread(new Runnable() {
266	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
267	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
268	>	lock.writeLock().lock();
269	>	Thread t = new Thread(new Runnable() {
270		public void run() {
271		threadAssertFalse(lock.writeLock().tryLock());
272	<	}
273	<	});
274	<	try {
275	<	t.start();
276	<	t.join();
277	<	lock.writeLock().unlock();
278	<	} catch(Exception e){
302	<	unexpectedException();
303	<	}
304	<	}
272	>	}
273	>	});
274	>
275	>	t.start();
276	>	t.join();
277	>	lock.writeLock().unlock();
278	>	}
279
280		/**
281		* read-tryLock fails if locked
282		*/
283	<	public void testReadTryLockWhenLocked() {
284	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	<	lock.writeLock().lock();
286	<	Thread t = new Thread(new Runnable() {
283	>	public void testReadTryLockWhenLocked() throws InterruptedException {
284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	>	lock.writeLock().lock();
286	>	Thread t = new Thread(new Runnable() {
287		public void run() {
288		threadAssertFalse(lock.readLock().tryLock());
289	<	}
290	<	});
291	<	try {
292	<	t.start();
293	<	t.join();
294	<	lock.writeLock().unlock();
295	<	} catch(Exception e){
322	<	unexpectedException();
323	<	}
324	<	}
289	>	}
290	>	});
291	>
292	>	t.start();
293	>	t.join();
294	>	lock.writeLock().unlock();
295	>	}
296
297		/**
298		* Multiple threads can hold a read lock when not write-locked
299		*/
300	<	public void testMultipleReadLocks() {
301	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302	<	lock.readLock().lock();
303	<	Thread t = new Thread(new Runnable() {
300	>	public void testMultipleReadLocks() throws InterruptedException {
301	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302	>	lock.readLock().lock();
303	>	Thread t = new Thread(new Runnable() {
304		public void run() {
305		threadAssertTrue(lock.readLock().tryLock());
306		lock.readLock().unlock();
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	t.join();
312	<	lock.readLock().unlock();
313	<	} catch(Exception e){
343	<	unexpectedException();
344	<	}
345	<	}
307	>	}
308	>	});
309	>
310	>	t.start();
311	>	t.join();
312	>	lock.readLock().unlock();
313	>	}
314
315		/**
316		* A writelock succeeds after reading threads unlock
317		*/
318	<	public void testWriteAfterMultipleReadLocks() {
319	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	<	lock.readLock().lock();
321	<	Thread t1 = new Thread(new Runnable() {
318	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
319	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	>	lock.readLock().lock();
321	>	Thread t1 = new Thread(new Runnable() {
322		public void run() {
323		lock.readLock().lock();
324		lock.readLock().unlock();
325	<	}
326	<	});
327	<	Thread t2 = new Thread(new Runnable() {
325	>	}
326	>	});
327	>	Thread t2 = new Thread(new Runnable() {
328		public void run() {
329		lock.writeLock().lock();
330		lock.writeLock().unlock();
331	<	}
332	<	});
331	>	}
332	>	});
333
334	<	try {
335	<	t1.start();
336	<	t2.start();
337	<	Thread.sleep(SHORT_DELAY_MS);
338	<	lock.readLock().unlock();
339	<	t1.join(MEDIUM_DELAY_MS);
340	<	t2.join(MEDIUM_DELAY_MS);
341	<	assertTrue(!t1.isAlive());
342	<	assertTrue(!t2.isAlive());
375	<
376	<	} catch(Exception e){
377	<	unexpectedException();
378	<	}
379	<	}
334	>	t1.start();
335	>	t2.start();
336	>	Thread.sleep(SHORT_DELAY_MS);
337	>	lock.readLock().unlock();
338	>	t1.join(MEDIUM_DELAY_MS);
339	>	t2.join(MEDIUM_DELAY_MS);
340	>	assertTrue(!t1.isAlive());
341	>	assertTrue(!t2.isAlive());
342	>	}
343
344		/**
345		* Readlocks succeed after a writing thread unlocks
346		*/
347	<	public void testReadAfterWriteLock() {
348	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
349	<	lock.writeLock().lock();
350	<	Thread t1 = new Thread(new Runnable() {
347	>	public void testReadAfterWriteLock() throws InterruptedException {
348	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
349	>	lock.writeLock().lock();
350	>	Thread t1 = new Thread(new Runnable() {
351		public void run() {
352		lock.readLock().lock();
353		lock.readLock().unlock();
354	<	}
355	<	});
356	<	Thread t2 = new Thread(new Runnable() {
354	>	}
355	>	});
356	>	Thread t2 = new Thread(new Runnable() {
357		public void run() {
358		lock.readLock().lock();
359		lock.readLock().unlock();
360	<	}
361	<	});
360	>	}
361	>	});
362
363	<	try {
364	<	t1.start();
365	<	t2.start();
366	<	Thread.sleep(SHORT_DELAY_MS);
367	<	lock.writeLock().unlock();
368	<	t1.join(MEDIUM_DELAY_MS);
369	<	t2.join(MEDIUM_DELAY_MS);
370	<	assertTrue(!t1.isAlive());
371	<	assertTrue(!t2.isAlive());
409	<
410	<	} catch(Exception e){
411	<	unexpectedException();
412	<	}
413	<	}
363	>	t1.start();
364	>	t2.start();
365	>	Thread.sleep(SHORT_DELAY_MS);
366	>	lock.writeLock().unlock();
367	>	t1.join(MEDIUM_DELAY_MS);
368	>	t2.join(MEDIUM_DELAY_MS);
369	>	assertTrue(!t1.isAlive());
370	>	assertTrue(!t2.isAlive());
371	>	}
372
373		/**
374		* Read trylock succeeds if write locked by current thread
375		*/
376	<	public void testReadHoldingWriteLock() {
377	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
378	<	lock.writeLock().lock();
376	>	public void testReadHoldingWriteLock() {
377	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
378	>	lock.writeLock().lock();
379		assertTrue(lock.readLock().tryLock());
380		lock.readLock().unlock();
381		lock.writeLock().unlock();
382	<	}
382	>	}
383
384		/**
385		* Read lock succeeds if write locked by current thread even if
386		* other threads are waiting for readlock
387		*/
388	<	public void testReadHoldingWriteLock2() {
389	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
390	<	lock.writeLock().lock();
391	<	Thread t1 = new Thread(new Runnable() {
388	>	public void testReadHoldingWriteLock2() throws InterruptedException {
389	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
390	>	lock.writeLock().lock();
391	>	Thread t1 = new Thread(new Runnable() {
392		public void run() {
393		lock.readLock().lock();
394		lock.readLock().unlock();
395	<	}
396	<	});
397	<	Thread t2 = new Thread(new Runnable() {
395	>	}
396	>	});
397	>	Thread t2 = new Thread(new Runnable() {
398		public void run() {
399		lock.readLock().lock();
400		lock.readLock().unlock();
401	<	}
402	<	});
401	>	}
402	>	});
403
404	<	try {
405	<	t1.start();
406	<	t2.start();
407	<	lock.readLock().lock();
408	<	lock.readLock().unlock();
409	<	Thread.sleep(SHORT_DELAY_MS);
410	<	lock.readLock().lock();
411	<	lock.readLock().unlock();
412	<	lock.writeLock().unlock();
413	<	t1.join(MEDIUM_DELAY_MS);
414	<	t2.join(MEDIUM_DELAY_MS);
415	<	assertTrue(!t1.isAlive());
416	<	assertTrue(!t2.isAlive());
459	<
460	<	} catch(Exception e){
461	<	unexpectedException();
462	<	}
463	<	}
404	>	t1.start();
405	>	t2.start();
406	>	lock.readLock().lock();
407	>	lock.readLock().unlock();
408	>	Thread.sleep(SHORT_DELAY_MS);
409	>	lock.readLock().lock();
410	>	lock.readLock().unlock();
411	>	lock.writeLock().unlock();
412	>	t1.join(MEDIUM_DELAY_MS);
413	>	t2.join(MEDIUM_DELAY_MS);
414	>	assertTrue(!t1.isAlive());
415	>	assertTrue(!t2.isAlive());
416	>	}
417
418		/**
419		*  Read lock succeeds if write locked by current thread even if
420		* other threads are waiting for writelock
421		*/
422	<	public void testReadHoldingWriteLock3() {
423	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
424	<	lock.writeLock().lock();
425	<	Thread t1 = new Thread(new Runnable() {
422	>	public void testReadHoldingWriteLock3() throws InterruptedException {
423	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
424	>	lock.writeLock().lock();
425	>	Thread t1 = new Thread(new Runnable() {
426		public void run() {
427		lock.writeLock().lock();
428		lock.writeLock().unlock();
429	<	}
430	<	});
431	<	Thread t2 = new Thread(new Runnable() {
429	>	}
430	>	});
431	>	Thread t2 = new Thread(new Runnable() {
432		public void run() {
433		lock.writeLock().lock();
434		lock.writeLock().unlock();
435	<	}
436	<	});
435	>	}
436	>	});
437
438	<	try {
439	<	t1.start();
440	<	t2.start();
441	<	lock.readLock().lock();
442	<	lock.readLock().unlock();
443	<	Thread.sleep(SHORT_DELAY_MS);
444	<	lock.readLock().lock();
445	<	lock.readLock().unlock();
446	<	lock.writeLock().unlock();
447	<	t1.join(MEDIUM_DELAY_MS);
448	<	t2.join(MEDIUM_DELAY_MS);
449	<	assertTrue(!t1.isAlive());
450	<	assertTrue(!t2.isAlive());
498	<
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
502	<	}
438	>	t1.start();
439	>	t2.start();
440	>	lock.readLock().lock();
441	>	lock.readLock().unlock();
442	>	Thread.sleep(SHORT_DELAY_MS);
443	>	lock.readLock().lock();
444	>	lock.readLock().unlock();
445	>	lock.writeLock().unlock();
446	>	t1.join(MEDIUM_DELAY_MS);
447	>	t2.join(MEDIUM_DELAY_MS);
448	>	assertTrue(!t1.isAlive());
449	>	assertTrue(!t2.isAlive());
450	>	}
451
452
453		/**
454		*  Write lock succeeds if write locked by current thread even if
455		* other threads are waiting for writelock
456		*/
457	<	public void testWriteHoldingWriteLock4() {
458	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	<	lock.writeLock().lock();
460	<	Thread t1 = new Thread(new Runnable() {
457	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	>	lock.writeLock().lock();
460	>	Thread t1 = new Thread(new Runnable() {
461		public void run() {
462		lock.writeLock().lock();
463		lock.writeLock().unlock();
464	<	}
465	<	});
466	<	Thread t2 = new Thread(new Runnable() {
464	>	}
465	>	});
466	>	Thread t2 = new Thread(new Runnable() {
467		public void run() {
468		lock.writeLock().lock();
469		lock.writeLock().unlock();
470	<	}
471	<	});
470	>	}
471	>	});
472
473	<	try {
474	<	t1.start();
475	<	t2.start();
476	<	lock.writeLock().lock();
477	<	lock.writeLock().unlock();
478	<	Thread.sleep(SHORT_DELAY_MS);
479	<	lock.writeLock().lock();
480	<	lock.writeLock().unlock();
481	<	lock.writeLock().unlock();
482	<	t1.join(MEDIUM_DELAY_MS);
483	<	t2.join(MEDIUM_DELAY_MS);
484	<	assertTrue(!t1.isAlive());
485	<	assertTrue(!t2.isAlive());
538	<
539	<	} catch(Exception e){
540	<	unexpectedException();
541	<	}
542	<	}
473	>	t1.start();
474	>	t2.start();
475	>	lock.writeLock().lock();
476	>	lock.writeLock().unlock();
477	>	Thread.sleep(SHORT_DELAY_MS);
478	>	lock.writeLock().lock();
479	>	lock.writeLock().unlock();
480	>	lock.writeLock().unlock();
481	>	t1.join(MEDIUM_DELAY_MS);
482	>	t2.join(MEDIUM_DELAY_MS);
483	>	assertTrue(!t1.isAlive());
484	>	assertTrue(!t2.isAlive());
485	>	}
486
487
488		/**
489		* Fair Read trylock succeeds if write locked by current thread
490		*/
491	<	public void testReadHoldingWriteLockFair() {
492	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
493	<	lock.writeLock().lock();
491	>	public void testReadHoldingWriteLockFair() {
492	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
493	>	lock.writeLock().lock();
494		assertTrue(lock.readLock().tryLock());
495		lock.readLock().unlock();
496		lock.writeLock().unlock();
497	<	}
497	>	}
498
499		/**
500		* Fair Read lock succeeds if write locked by current thread even if
501		* other threads are waiting for readlock
502		*/
503	<	public void testReadHoldingWriteLockFair2() {
504	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
505	<	lock.writeLock().lock();
506	<	Thread t1 = new Thread(new Runnable() {
503	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
504	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
505	>	lock.writeLock().lock();
506	>	Thread t1 = new Thread(new Runnable() {
507		public void run() {
508		lock.readLock().lock();
509		lock.readLock().unlock();
510	<	}
511	<	});
512	<	Thread t2 = new Thread(new Runnable() {
510	>	}
511	>	});
512	>	Thread t2 = new Thread(new Runnable() {
513		public void run() {
514		lock.readLock().lock();
515		lock.readLock().unlock();
516	<	}
517	<	});
516	>	}
517	>	});
518
519	<	try {
520	<	t1.start();
521	<	t2.start();
522	<	lock.readLock().lock();
523	<	lock.readLock().unlock();
524	<	Thread.sleep(SHORT_DELAY_MS);
525	<	lock.readLock().lock();
526	<	lock.readLock().unlock();
527	<	lock.writeLock().unlock();
528	<	t1.join(MEDIUM_DELAY_MS);
529	<	t2.join(MEDIUM_DELAY_MS);
530	<	assertTrue(!t1.isAlive());
531	<	assertTrue(!t2.isAlive());
589	<
590	<	} catch(Exception e){
591	<	unexpectedException();
592	<	}
593	<	}
519	>	t1.start();
520	>	t2.start();
521	>	lock.readLock().lock();
522	>	lock.readLock().unlock();
523	>	Thread.sleep(SHORT_DELAY_MS);
524	>	lock.readLock().lock();
525	>	lock.readLock().unlock();
526	>	lock.writeLock().unlock();
527	>	t1.join(MEDIUM_DELAY_MS);
528	>	t2.join(MEDIUM_DELAY_MS);
529	>	assertTrue(!t1.isAlive());
530	>	assertTrue(!t2.isAlive());
531	>	}
532
533
534		/**
535		* Fair Read lock succeeds if write locked by current thread even if
536		* other threads are waiting for writelock
537		*/
538	<	public void testReadHoldingWriteLockFair3() {
539	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
540	<	lock.writeLock().lock();
541	<	Thread t1 = new Thread(new Runnable() {
538	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
539	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
540	>	lock.writeLock().lock();
541	>	Thread t1 = new Thread(new Runnable() {
542		public void run() {
543		lock.writeLock().lock();
544		lock.writeLock().unlock();
545	<	}
546	<	});
547	<	Thread t2 = new Thread(new Runnable() {
545	>	}
546	>	});
547	>	Thread t2 = new Thread(new Runnable() {
548		public void run() {
549		lock.writeLock().lock();
550		lock.writeLock().unlock();
551	<	}
552	<	});
551	>	}
552	>	});
553
554	<	try {
555	<	t1.start();
556	<	t2.start();
557	<	lock.readLock().lock();
558	<	lock.readLock().unlock();
559	<	Thread.sleep(SHORT_DELAY_MS);
560	<	lock.readLock().lock();
561	<	lock.readLock().unlock();
562	<	lock.writeLock().unlock();
563	<	t1.join(MEDIUM_DELAY_MS);
564	<	t2.join(MEDIUM_DELAY_MS);
565	<	assertTrue(!t1.isAlive());
566	<	assertTrue(!t2.isAlive());
629	<
630	<	} catch(Exception e){
631	<	unexpectedException();
632	<	}
633	<	}
554	>	t1.start();
555	>	t2.start();
556	>	lock.readLock().lock();
557	>	lock.readLock().unlock();
558	>	Thread.sleep(SHORT_DELAY_MS);
559	>	lock.readLock().lock();
560	>	lock.readLock().unlock();
561	>	lock.writeLock().unlock();
562	>	t1.join(MEDIUM_DELAY_MS);
563	>	t2.join(MEDIUM_DELAY_MS);
564	>	assertTrue(!t1.isAlive());
565	>	assertTrue(!t2.isAlive());
566	>	}
567
568
569		/**
570		* Fair Write lock succeeds if write locked by current thread even if
571		* other threads are waiting for writelock
572		*/
573	<	public void testWriteHoldingWriteLockFair4() {
574	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
575	<	lock.writeLock().lock();
576	<	Thread t1 = new Thread(new Runnable() {
573	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
574	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
575	>	lock.writeLock().lock();
576	>	Thread t1 = new Thread(new Runnable() {
577		public void run() {
578		lock.writeLock().lock();
579		lock.writeLock().unlock();
580	<	}
581	<	});
582	<	Thread t2 = new Thread(new Runnable() {
580	>	}
581	>	});
582	>	Thread t2 = new Thread(new Runnable() {
583		public void run() {
584		lock.writeLock().lock();
585		lock.writeLock().unlock();
586	<	}
587	<	});
586	>	}
587	>	});
588
589	<	try {
590	<	t1.start();
591	<	t2.start();
592	<	Thread.sleep(SHORT_DELAY_MS);
593	<	assertTrue(lock.isWriteLockedByCurrentThread());
594	<	assertTrue(lock.getWriteHoldCount() == 1);
595	<	lock.writeLock().lock();
596	<	assertTrue(lock.getWriteHoldCount() == 2);
597	<	lock.writeLock().unlock();
598	<	lock.writeLock().lock();
599	<	lock.writeLock().unlock();
600	<	lock.writeLock().unlock();
601	<	t1.join(MEDIUM_DELAY_MS);
602	<	t2.join(MEDIUM_DELAY_MS);
603	<	assertTrue(!t1.isAlive());
604	<	assertTrue(!t2.isAlive());
672	<
673	<	} catch(Exception e){
674	<	unexpectedException();
675	<	}
676	<	}
589	>	t1.start();
590	>	t2.start();
591	>	Thread.sleep(SHORT_DELAY_MS);
592	>	assertTrue(lock.isWriteLockedByCurrentThread());
593	>	assertTrue(lock.getWriteHoldCount() == 1);
594	>	lock.writeLock().lock();
595	>	assertTrue(lock.getWriteHoldCount() == 2);
596	>	lock.writeLock().unlock();
597	>	lock.writeLock().lock();
598	>	lock.writeLock().unlock();
599	>	lock.writeLock().unlock();
600	>	t1.join(MEDIUM_DELAY_MS);
601	>	t2.join(MEDIUM_DELAY_MS);
602	>	assertTrue(!t1.isAlive());
603	>	assertTrue(!t2.isAlive());
604	>	}
605
606
607		/**
608		* Read tryLock succeeds if readlocked but not writelocked
609		*/
610	<	public void testTryLockWhenReadLocked() {
611	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
612	<	lock.readLock().lock();
613	<	Thread t = new Thread(new Runnable() {
610	>	public void testTryLockWhenReadLocked() throws InterruptedException {
611	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
612	>	lock.readLock().lock();
613	>	Thread t = new Thread(new Runnable() {
614		public void run() {
615		threadAssertTrue(lock.readLock().tryLock());
616		lock.readLock().unlock();
617	<	}
618	<	});
619	<	try {
620	<	t.start();
621	<	t.join();
622	<	lock.readLock().unlock();
623	<	} catch(Exception e){
624	<	unexpectedException();
697	<	}
698	<	}
617	>	}
618	>	});
619	>
620	>	t.start();
621	>	t.join();
622	>	lock.readLock().unlock();
623	>	}
624	>
625
700	–
626
627		/**
628		* write tryLock fails when readlocked
629		*/
630	<	public void testWriteTryLockWhenReadLocked() {
631	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
632	<	lock.readLock().lock();
633	<	Thread t = new Thread(new Runnable() {
630	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
631	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
632	>	lock.readLock().lock();
633	>	Thread t = new Thread(new Runnable() {
634		public void run() {
635		threadAssertFalse(lock.writeLock().tryLock());
636	<	}
637	<	});
638	<	try {
639	<	t.start();
640	<	t.join();
641	<	lock.readLock().unlock();
642	<	} catch(Exception e){
718	<	unexpectedException();
719	<	}
720	<	}
636	>	}
637	>	});
638	>
639	>	t.start();
640	>	t.join();
641	>	lock.readLock().unlock();
642	>	}
643
644
645		/**
646		* Fair Read tryLock succeeds if readlocked but not writelocked
647		*/
648	<	public void testTryLockWhenReadLockedFair() {
649	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
650	<	lock.readLock().lock();
651	<	Thread t = new Thread(new Runnable() {
648	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
649	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
650	>	lock.readLock().lock();
651	>	Thread t = new Thread(new Runnable() {
652		public void run() {
653		threadAssertTrue(lock.readLock().tryLock());
654		lock.readLock().unlock();
655	<	}
656	<	});
657	<	try {
658	<	t.start();
659	<	t.join();
660	<	lock.readLock().unlock();
661	<	} catch(Exception e){
662	<	unexpectedException();
741	<	}
742	<	}
655	>	}
656	>	});
657	>
658	>	t.start();
659	>	t.join();
660	>	lock.readLock().unlock();
661	>	}
662	>
663
744	–
664
665		/**
666		* Fair write tryLock fails when readlocked
667		*/
668	<	public void testWriteTryLockWhenReadLockedFair() {
669	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
670	<	lock.readLock().lock();
671	<	Thread t = new Thread(new Runnable() {
668	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
669	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
670	>	lock.readLock().lock();
671	>	Thread t = new Thread(new Runnable() {
672		public void run() {
673		threadAssertFalse(lock.writeLock().tryLock());
674	<	}
675	<	});
676	<	try {
677	<	t.start();
678	<	t.join();
679	<	lock.readLock().unlock();
680	<	} catch(Exception e){
681	<	unexpectedException();
763	<	}
764	<	}
674	>	}
675	>	});
676	>
677	>	t.start();
678	>	t.join();
679	>	lock.readLock().unlock();
680	>	}
681	>
682
766	–
683
684		/**
685		* write timed tryLock times out if locked
686		*/
687	<	public void testWriteTryLock_Timeout() {
688	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	<	lock.writeLock().lock();
690	<	Thread t = new Thread(new Runnable() {
691	<	public void run() {
692	<	try {
693	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
694	<	} catch (Exception ex) {
695	<	threadUnexpectedException();
696	<	}
697	<	}
698	<	});
699	<	try {
784	<	t.start();
785	<	t.join();
786	<	lock.writeLock().unlock();
787	<	} catch(Exception e){
788	<	unexpectedException();
789	<	}
790	<	}
687	>	public void testWriteTryLock_Timeout() throws InterruptedException {
688	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	>	lock.writeLock().lock();
690	>	Thread t = new Thread(new CheckedRunnable() {
691	>	public void realRun() throws InterruptedException {
692	>	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693	>	}});
694	>
695	>	t.start();
696	>	t.join();
697	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
698	>	lock.writeLock().unlock();
699	>	}
700
701		/**
702		* read timed tryLock times out if write-locked
703		*/
704	<	public void testReadTryLock_Timeout() {
705	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
706	<	lock.writeLock().lock();
707	<	Thread t = new Thread(new Runnable() {
708	<	public void run() {
709	<	try {
710	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
711	<	} catch (Exception ex) {
712	<	threadUnexpectedException();
713	<	}
714	<	}
715	<	});
716	<	try {
808	<	t.start();
809	<	t.join();
810	<	lock.writeLock().unlock();
811	<	} catch(Exception e){
812	<	unexpectedException();
813	<	}
814	<	}
704	>	public void testReadTryLock_Timeout() throws InterruptedException {
705	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
706	>	lock.writeLock().lock();
707	>	Thread t = new Thread(new CheckedRunnable() {
708	>	public void realRun() throws InterruptedException {
709	>	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
710	>	}});
711	>
712	>	t.start();
713	>	t.join();
714	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
715	>	lock.writeLock().unlock();
716	>	}
717
718
719		/**
720		* write lockInterruptibly succeeds if lock free else is interruptible
721		*/
722	<	public void testWriteLockInterruptibly() {
723	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
724	<	try {
725	<	lock.writeLock().lockInterruptibly();
726	<	} catch(Exception e) {
727	<	unexpectedException();
728	<	}
729	<	Thread t = new Thread(new Runnable() {
730	<	public void run() {
731	<	try {
732	<	lock.writeLock().lockInterruptibly();
733	<	threadShouldThrow();
734	<	}
735	<	catch(InterruptedException success) {
834	<	}
835	<	}
836	<	});
837	<	try {
838	<	t.start();
839	<	Thread.sleep(SHORT_DELAY_MS);
840	<	t.interrupt();
841	<	t.join();
842	<	lock.writeLock().unlock();
843	<	} catch(Exception e){
844	<	unexpectedException();
845	<	}
722	>	public void testWriteLockInterruptibly() throws InterruptedException {
723	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
724	>	lock.writeLock().lockInterruptibly();
725	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
726	>	public void realRun() throws InterruptedException {
727	>	lock.writeLock().lockInterruptibly();
728	>	}});
729	>
730	>	t.start();
731	>	Thread.sleep(SHORT_DELAY_MS);
732	>	t.interrupt();
733	>	Thread.sleep(SHORT_DELAY_MS);
734	>	t.join();
735	>	lock.writeLock().unlock();
736		}
737
738		/**
739		*  read lockInterruptibly succeeds if lock free else is interruptible
740		*/
741	<	public void testReadLockInterruptibly() {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	<	try {
744	<	lock.writeLock().lockInterruptibly();
745	<	} catch(Exception e) {
746	<	unexpectedException();
747	<	}
748	<	Thread t = new Thread(new Runnable() {
749	<	public void run() {
750	<	try {
751	<	lock.readLock().lockInterruptibly();
752	<	threadShouldThrow();
753	<	}
864	<	catch(InterruptedException success) {
865	<	}
866	<	}
867	<	});
868	<	try {
869	<	t.start();
870	<	Thread.sleep(SHORT_DELAY_MS);
871	<	t.interrupt();
872	<	t.join();
873	<	lock.writeLock().unlock();
874	<	} catch(Exception e){
875	<	unexpectedException();
876	<	}
741	>	public void testReadLockInterruptibly() throws InterruptedException {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	>	lock.writeLock().lockInterruptibly();
744	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
745	>	public void realRun() throws InterruptedException {
746	>	lock.readLock().lockInterruptibly();
747	>	}});
748	>
749	>	t.start();
750	>	Thread.sleep(SHORT_DELAY_MS);
751	>	t.interrupt();
752	>	t.join();
753	>	lock.writeLock().unlock();
754		}
755
756		/**
757		* Calling await without holding lock throws IllegalMonitorStateException
758		*/
759	<	public void testAwait_IllegalMonitor() {
760	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	>	public void testAwait_IllegalMonitor() throws InterruptedException {
760	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761		final Condition c = lock.writeLock().newCondition();
762		try {
763		c.await();
764		shouldThrow();
765	<	}
889	<	catch (IllegalMonitorStateException success) {
890	<	}
891	<	catch (Exception ex) {
892	<	shouldThrow();
893	<	}
765	>	} catch (IllegalMonitorStateException success) {}
766		}
767
768		/**
769		* Calling signal without holding lock throws IllegalMonitorStateException
770		*/
771		public void testSignal_IllegalMonitor() {
772	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
773		final Condition c = lock.writeLock().newCondition();
774		try {
775		c.signal();
776		shouldThrow();
777	<	}
906	<	catch (IllegalMonitorStateException success) {
907	<	}
908	<	catch (Exception ex) {
909	<	unexpectedException();
910	<	}
777	>	} catch (IllegalMonitorStateException success) {}
778		}
779
780		/**
781		* awaitNanos without a signal times out
782		*/
783	<	public void testAwaitNanos_Timeout() {
784	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
783	>	public void testAwaitNanos_Timeout() throws InterruptedException {
784	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
785		final Condition c = lock.writeLock().newCondition();
786	<	try {
787	<	lock.writeLock().lock();
788	<	long t = c.awaitNanos(100);
789	<	assertTrue(t <= 0);
790	<	lock.writeLock().unlock();
924	<	}
925	<	catch (Exception ex) {
926	<	unexpectedException();
927	<	}
786	>
787	>	lock.writeLock().lock();
788	>	long t = c.awaitNanos(100);
789	>	assertTrue(t <= 0);
790	>	lock.writeLock().unlock();
791		}
792
793
794		/**
795		*  timed await without a signal times out
796		*/
797	<	public void testAwait_Timeout() {
798	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
797	>	public void testAwait_Timeout() throws InterruptedException {
798	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
799		final Condition c = lock.writeLock().newCondition();
800	<	try {
801	<	lock.writeLock().lock();
802	<	lock.writeLock().unlock();
940	<	}
941	<	catch (Exception ex) {
942	<	unexpectedException();
943	<	}
800	>	lock.writeLock().lock();
801	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
802	>	lock.writeLock().unlock();
803		}
804
805		/**
806		* awaitUntil without a signal times out
807		*/
808	<	public void testAwaitUntil_Timeout() {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
808	>	public void testAwaitUntil_Timeout() throws InterruptedException {
809	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
810		final Condition c = lock.writeLock().newCondition();
811	<	try {
812	<	lock.writeLock().lock();
813	<	java.util.Date d = new java.util.Date();
814	<	lock.writeLock().unlock();
956	<	}
957	<	catch (Exception ex) {
958	<	unexpectedException();
959	<	}
811	>	lock.writeLock().lock();
812	>	java.util.Date d = new java.util.Date();
813	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
814	>	lock.writeLock().unlock();
815		}
816
817		/**
818		* await returns when signalled
819		*/
820	<	public void testAwait() {
821	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820	>	public void testAwait() throws InterruptedException {
821	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
822		final Condition c = lock.writeLock().newCondition();
823	<	Thread t = new Thread(new Runnable() {
824	<	public void run() {
825	<	try {
826	<	lock.writeLock().lock();
827	<	c.await();
828	<	lock.writeLock().unlock();
974	<	}
975	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
823	>	Thread t = new Thread(new CheckedRunnable() {
824	>	public void realRun() throws InterruptedException {
825	>	lock.writeLock().lock();
826	>	c.await();
827	>	lock.writeLock().unlock();
828	>	}});
829
830	<	try {
831	<	t.start();
832	<	Thread.sleep(SHORT_DELAY_MS);
833	<	lock.writeLock().lock();
834	<	c.signal();
835	<	lock.writeLock().unlock();
836	<	t.join(SHORT_DELAY_MS);
988	<	assertFalse(t.isAlive());
989	<	}
990	<	catch (Exception ex) {
991	<	unexpectedException();
992	<	}
830	>	t.start();
831	>	Thread.sleep(SHORT_DELAY_MS);
832	>	lock.writeLock().lock();
833	>	c.signal();
834	>	lock.writeLock().unlock();
835	>	t.join(SHORT_DELAY_MS);
836	>	assertFalse(t.isAlive());
837		}
838
839		/** A helper class for uninterruptible wait tests */
840		class UninterruptableThread extends Thread {
841		private Lock lock;
842		private Condition c;
843	<
843	>
844		public volatile boolean canAwake = false;
845		public volatile boolean interrupted = false;
846		public volatile boolean lockStarted = false;
847	<
847	>
848		public UninterruptableThread(Lock lock, Condition c) {
849		this.lock = lock;
850		this.c = c;
851		}
852	<
852	>
853		public synchronized void run() {
854		lock.lock();
855		lockStarted = true;
856	<
856	>
857		while (!canAwake) {
858		c.awaitUninterruptibly();
859		}
860	<
860	>
861		interrupted = isInterrupted();
862		lock.unlock();
863		}
#	Line 1022 | Line 866 | public class ReentrantReadWriteLockTest
866		/**
867		* awaitUninterruptibly doesn't abort on interrupt
868		*/
869	<	public void testAwaitUninterruptibly() {
869	>	public void testAwaitUninterruptibly() throws InterruptedException {
870		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
871		final Condition c = lock.writeLock().newCondition();
872		UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
873
874	<	try {
1031	<	thread.start();
1032	<
1033	<	while (!thread.lockStarted) {
1034	<	Thread.sleep(100);
1035	<	}
874	>	thread.start();
875
876	<	lock.writeLock().lock();
877	<	try {
878	<	thread.interrupt();
1040	<	thread.canAwake = true;
1041	<	c.signal();
1042	<	} finally {
1043	<	lock.writeLock().unlock();
1044	<	}
876	>	while (!thread.lockStarted) {
877	>	Thread.sleep(100);
878	>	}
879
880	<	thread.join();
881	<	assertTrue(thread.interrupted);
882	<	assertFalse(thread.isAlive());
883	<	} catch (Exception ex) {
884	<	unexpectedException();
880	>	lock.writeLock().lock();
881	>	try {
882	>	thread.interrupt();
883	>	thread.canAwake = true;
884	>	c.signal();
885	>	} finally {
886	>	lock.writeLock().unlock();
887		}
888	+
889	+	thread.join();
890	+	assertTrue(thread.interrupted);
891	+	assertFalse(thread.isAlive());
892		}
893
894		/**
895		* await is interruptible
896		*/
897	<	public void testAwait_Interrupt() {
898	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
897	>	public void testAwait_Interrupt() throws InterruptedException {
898	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
899		final Condition c = lock.writeLock().newCondition();
900	<	Thread t = new Thread(new Runnable() {
901	<	public void run() {
902	<	try {
903	<	lock.writeLock().lock();
904	<	c.await();
905	<	lock.writeLock().unlock();
1066	<	threadShouldThrow();
1067	<	}
1068	<	catch(InterruptedException success) {
1069	<	}
1070	<	}
1071	<	});
900	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
901	>	public void realRun() throws InterruptedException {
902	>	lock.writeLock().lock();
903	>	c.await();
904	>	lock.writeLock().unlock();
905	>	}});
906
907	<	try {
908	<	t.start();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	t.interrupt();
911	<	t.join(SHORT_DELAY_MS);
1078	<	assertFalse(t.isAlive());
1079	<	}
1080	<	catch (Exception ex) {
1081	<	unexpectedException();
1082	<	}
907	>	t.start();
908	>	Thread.sleep(SHORT_DELAY_MS);
909	>	t.interrupt();
910	>	t.join(SHORT_DELAY_MS);
911	>	assertFalse(t.isAlive());
912		}
913
914		/**
915		* awaitNanos is interruptible
916		*/
917	<	public void testAwaitNanos_Interrupt() {
918	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
917	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
918	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
919		final Condition c = lock.writeLock().newCondition();
920	<	Thread t = new Thread(new Runnable() {
921	<	public void run() {
922	<	try {
923	<	lock.writeLock().lock();
924	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
925	<	lock.writeLock().unlock();
1097	<	threadShouldThrow();
1098	<	}
1099	<	catch(InterruptedException success) {
1100	<	}
1101	<	}
1102	<	});
920	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
921	>	public void realRun() throws InterruptedException {
922	>	lock.writeLock().lock();
923	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
924	>	lock.writeLock().unlock();
925	>	}});
926
927	<	try {
928	<	t.start();
929	<	Thread.sleep(SHORT_DELAY_MS);
930	<	t.interrupt();
931	<	t.join(SHORT_DELAY_MS);
1109	<	assertFalse(t.isAlive());
1110	<	}
1111	<	catch (Exception ex) {
1112	<	unexpectedException();
1113	<	}
927	>	t.start();
928	>	Thread.sleep(SHORT_DELAY_MS);
929	>	t.interrupt();
930	>	t.join(SHORT_DELAY_MS);
931	>	assertFalse(t.isAlive());
932		}
933
934		/**
935		* awaitUntil is interruptible
936		*/
937	<	public void testAwaitUntil_Interrupt() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
937	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
938	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
939		final Condition c = lock.writeLock().newCondition();
940	<	Thread t = new Thread(new Runnable() {
941	<	public void run() {
942	<	try {
943	<	lock.writeLock().lock();
944	<	java.util.Date d = new java.util.Date();
945	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
946	<	lock.writeLock().unlock();
1129	<	threadShouldThrow();
1130	<	}
1131	<	catch(InterruptedException success) {
1132	<	}
1133	<	}
1134	<	});
940	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
941	>	public void realRun() throws InterruptedException {
942	>	lock.writeLock().lock();
943	>	java.util.Date d = new java.util.Date();
944	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
945	>	lock.writeLock().unlock();
946	>	}});
947
948	<	try {
949	<	t.start();
950	<	Thread.sleep(SHORT_DELAY_MS);
951	<	t.interrupt();
952	<	t.join(SHORT_DELAY_MS);
1141	<	assertFalse(t.isAlive());
1142	<	}
1143	<	catch (Exception ex) {
1144	<	unexpectedException();
1145	<	}
948	>	t.start();
949	>	Thread.sleep(SHORT_DELAY_MS);
950	>	t.interrupt();
951	>	t.join(SHORT_DELAY_MS);
952	>	assertFalse(t.isAlive());
953		}
954
955		/**
956		* signalAll wakes up all threads
957		*/
958	<	public void testSignalAll() {
959	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
958	>	public void testSignalAll() throws InterruptedException {
959	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960		final Condition c = lock.writeLock().newCondition();
961	<	Thread t1 = new Thread(new Runnable() {
962	<	public void run() {
963	<	try {
964	<	lock.writeLock().lock();
965	<	c.await();
966	<	lock.writeLock().unlock();
1160	<	}
1161	<	catch(InterruptedException e) {
1162	<	threadUnexpectedException();
1163	<	}
1164	<	}
1165	<	});
1166	<
1167	<	Thread t2 = new Thread(new Runnable() {
1168	<	public void run() {
1169	<	try {
1170	<	lock.writeLock().lock();
1171	<	c.await();
1172	<	lock.writeLock().unlock();
1173	<	}
1174	<	catch(InterruptedException e) {
1175	<	threadUnexpectedException();
1176	<	}
1177	<	}
1178	<	});
961	>	Thread t1 = new Thread(new CheckedRunnable() {
962	>	public void realRun() throws InterruptedException {
963	>	lock.writeLock().lock();
964	>	c.await();
965	>	lock.writeLock().unlock();
966	>	}});
967
968	<	try {
969	<	t1.start();
970	<	t2.start();
971	<	Thread.sleep(SHORT_DELAY_MS);
972	<	lock.writeLock().lock();
973	<	c.signalAll();
974	<	lock.writeLock().unlock();
975	<	t1.join(SHORT_DELAY_MS);
976	<	t2.join(SHORT_DELAY_MS);
977	<	assertFalse(t1.isAlive());
978	<	assertFalse(t2.isAlive());
979	<	}
980	<	catch (Exception ex) {
981	<	unexpectedException();
982	<	}
968	>	Thread t2 = new Thread(new CheckedRunnable() {
969	>	public void realRun() throws InterruptedException {
970	>	lock.writeLock().lock();
971	>	c.await();
972	>	lock.writeLock().unlock();
973	>	}});
974	>
975	>	t1.start();
976	>	t2.start();
977	>	Thread.sleep(SHORT_DELAY_MS);
978	>	lock.writeLock().lock();
979	>	c.signalAll();
980	>	lock.writeLock().unlock();
981	>	t1.join(SHORT_DELAY_MS);
982	>	t2.join(SHORT_DELAY_MS);
983	>	assertFalse(t1.isAlive());
984	>	assertFalse(t2.isAlive());
985		}
986
987		/**
988		* A serialized lock deserializes as unlocked
989		*/
990	<	public void testSerialization() {
990	>	public void testSerialization() throws Exception {
991		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
992		l.readLock().lock();
993		l.readLock().unlock();
994
995	<	try {
996	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
997	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
998	<	out.writeObject(l);
999	<	out.close();
1000	<
1001	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1002	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1003	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1004	<	r.readLock().lock();
1215	<	r.readLock().unlock();
1216	<	} catch(Exception e){
1217	<	e.printStackTrace();
1218	<	unexpectedException();
1219	<	}
995	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
996	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
997	>	out.writeObject(l);
998	>	out.close();
999	>
1000	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1001	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1002	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1003	>	r.readLock().lock();
1004	>	r.readLock().unlock();
1005		}
1006
1007		/**
1008		* hasQueuedThreads reports whether there are waiting threads
1009		*/
1010	<	public void testhasQueuedThreads() {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testhasQueuedThreads() throws InterruptedException {
1011	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1012		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1013		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1014	<	try {
1015	<	assertFalse(lock.hasQueuedThreads());
1016	<	lock.writeLock().lock();
1017	<	t1.start();
1018	<	Thread.sleep(SHORT_DELAY_MS);
1019	<	assertTrue(lock.hasQueuedThreads());
1020	<	t2.start();
1021	<	Thread.sleep(SHORT_DELAY_MS);
1022	<	assertTrue(lock.hasQueuedThreads());
1023	<	t1.interrupt();
1024	<	Thread.sleep(SHORT_DELAY_MS);
1025	<	assertTrue(lock.hasQueuedThreads());
1026	<	lock.writeLock().unlock();
1027	<	Thread.sleep(SHORT_DELAY_MS);
1028	<	assertFalse(lock.hasQueuedThreads());
1029	<	t1.join();
1030	<	t2.join();
1246	<	} catch(Exception e){
1247	<	unexpectedException();
1248	<	}
1249	<	}
1014	>	assertFalse(lock.hasQueuedThreads());
1015	>	lock.writeLock().lock();
1016	>	t1.start();
1017	>	Thread.sleep(SHORT_DELAY_MS);
1018	>	assertTrue(lock.hasQueuedThreads());
1019	>	t2.start();
1020	>	Thread.sleep(SHORT_DELAY_MS);
1021	>	assertTrue(lock.hasQueuedThreads());
1022	>	t1.interrupt();
1023	>	Thread.sleep(SHORT_DELAY_MS);
1024	>	assertTrue(lock.hasQueuedThreads());
1025	>	lock.writeLock().unlock();
1026	>	Thread.sleep(SHORT_DELAY_MS);
1027	>	assertFalse(lock.hasQueuedThreads());
1028	>	t1.join();
1029	>	t2.join();
1030	>	}
1031
1032		/**
1033		* hasQueuedThread(null) throws NPE
1034		*/
1035	<	public void testHasQueuedThreadNPE() {
1036	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1035	>	public void testHasQueuedThreadNPE() {
1036	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1037		try {
1038		sync.hasQueuedThread(null);
1039		shouldThrow();
1040	<	} catch (NullPointerException success) {
1260	<	}
1040	>	} catch (NullPointerException success) {}
1041		}
1042
1043		/**
1044		* hasQueuedThread reports whether a thread is queued.
1045		*/
1046	<	public void testHasQueuedThread() {
1047	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1046	>	public void testHasQueuedThread() throws InterruptedException {
1047	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1048		Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1049		Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1050	<	try {
1051	<	assertFalse(sync.hasQueuedThread(t1));
1052	<	assertFalse(sync.hasQueuedThread(t2));
1053	<	sync.writeLock().lock();
1054	<	t1.start();
1055	<	Thread.sleep(SHORT_DELAY_MS);
1056	<	assertTrue(sync.hasQueuedThread(t1));
1057	<	t2.start();
1058	<	Thread.sleep(SHORT_DELAY_MS);
1059	<	assertTrue(sync.hasQueuedThread(t1));
1060	<	assertTrue(sync.hasQueuedThread(t2));
1061	<	t1.interrupt();
1062	<	Thread.sleep(SHORT_DELAY_MS);
1063	<	assertFalse(sync.hasQueuedThread(t1));
1064	<	assertTrue(sync.hasQueuedThread(t2));
1065	<	sync.writeLock().unlock();
1066	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	assertFalse(sync.hasQueuedThread(t1));
1068	<	Thread.sleep(SHORT_DELAY_MS);
1069	<	assertFalse(sync.hasQueuedThread(t2));
1070	<	t1.join();
1071	<	t2.join();
1292	<	} catch(Exception e){
1293	<	unexpectedException();
1294	<	}
1295	<	}
1050	>	assertFalse(sync.hasQueuedThread(t1));
1051	>	assertFalse(sync.hasQueuedThread(t2));
1052	>	sync.writeLock().lock();
1053	>	t1.start();
1054	>	Thread.sleep(SHORT_DELAY_MS);
1055	>	assertTrue(sync.hasQueuedThread(t1));
1056	>	t2.start();
1057	>	Thread.sleep(SHORT_DELAY_MS);
1058	>	assertTrue(sync.hasQueuedThread(t1));
1059	>	assertTrue(sync.hasQueuedThread(t2));
1060	>	t1.interrupt();
1061	>	Thread.sleep(SHORT_DELAY_MS);
1062	>	assertFalse(sync.hasQueuedThread(t1));
1063	>	assertTrue(sync.hasQueuedThread(t2));
1064	>	sync.writeLock().unlock();
1065	>	Thread.sleep(SHORT_DELAY_MS);
1066	>	assertFalse(sync.hasQueuedThread(t1));
1067	>	Thread.sleep(SHORT_DELAY_MS);
1068	>	assertFalse(sync.hasQueuedThread(t2));
1069	>	t1.join();
1070	>	t2.join();
1071	>	}
1072
1073
1074		/**
1075		* getQueueLength reports number of waiting threads
1076		*/
1077	<	public void testGetQueueLength() {
1078	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1077	>	public void testGetQueueLength() throws InterruptedException {
1078	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1079		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1080		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1081	<	try {
1082	<	assertEquals(0, lock.getQueueLength());
1083	<	lock.writeLock().lock();
1084	<	t1.start();
1085	<	Thread.sleep(SHORT_DELAY_MS);
1086	<	assertEquals(1, lock.getQueueLength());
1087	<	t2.start();
1088	<	Thread.sleep(SHORT_DELAY_MS);
1089	<	assertEquals(2, lock.getQueueLength());
1090	<	t1.interrupt();
1091	<	Thread.sleep(SHORT_DELAY_MS);
1092	<	assertEquals(1, lock.getQueueLength());
1093	<	lock.writeLock().unlock();
1094	<	Thread.sleep(SHORT_DELAY_MS);
1095	<	assertEquals(0, lock.getQueueLength());
1096	<	t1.join();
1097	<	t2.join();
1322	<	} catch(Exception e){
1323	<	unexpectedException();
1324	<	}
1325	<	}
1081	>	assertEquals(0, lock.getQueueLength());
1082	>	lock.writeLock().lock();
1083	>	t1.start();
1084	>	Thread.sleep(SHORT_DELAY_MS);
1085	>	assertEquals(1, lock.getQueueLength());
1086	>	t2.start();
1087	>	Thread.sleep(SHORT_DELAY_MS);
1088	>	assertEquals(2, lock.getQueueLength());
1089	>	t1.interrupt();
1090	>	Thread.sleep(SHORT_DELAY_MS);
1091	>	assertEquals(1, lock.getQueueLength());
1092	>	lock.writeLock().unlock();
1093	>	Thread.sleep(SHORT_DELAY_MS);
1094	>	assertEquals(0, lock.getQueueLength());
1095	>	t1.join();
1096	>	t2.join();
1097	>	}
1098
1099		/**
1100		* getQueuedThreads includes waiting threads
1101		*/
1102	<	public void testGetQueuedThreads() {
1103	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1102	>	public void testGetQueuedThreads() throws InterruptedException {
1103	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1104		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1105		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1106	<	try {
1107	<	assertTrue(lock.getQueuedThreads().isEmpty());
1108	<	lock.writeLock().lock();
1109	<	assertTrue(lock.getQueuedThreads().isEmpty());
1110	<	t1.start();
1111	<	Thread.sleep(SHORT_DELAY_MS);
1112	<	assertTrue(lock.getQueuedThreads().contains(t1));
1113	<	t2.start();
1114	<	Thread.sleep(SHORT_DELAY_MS);
1115	<	assertTrue(lock.getQueuedThreads().contains(t1));
1116	<	assertTrue(lock.getQueuedThreads().contains(t2));
1117	<	t1.interrupt();
1118	<	Thread.sleep(SHORT_DELAY_MS);
1119	<	assertFalse(lock.getQueuedThreads().contains(t1));
1120	<	assertTrue(lock.getQueuedThreads().contains(t2));
1121	<	lock.writeLock().unlock();
1122	<	Thread.sleep(SHORT_DELAY_MS);
1123	<	assertTrue(lock.getQueuedThreads().isEmpty());
1124	<	t1.join();
1125	<	t2.join();
1354	<	} catch(Exception e){
1355	<	unexpectedException();
1356	<	}
1357	<	}
1106	>	assertTrue(lock.getQueuedThreads().isEmpty());
1107	>	lock.writeLock().lock();
1108	>	assertTrue(lock.getQueuedThreads().isEmpty());
1109	>	t1.start();
1110	>	Thread.sleep(SHORT_DELAY_MS);
1111	>	assertTrue(lock.getQueuedThreads().contains(t1));
1112	>	t2.start();
1113	>	Thread.sleep(SHORT_DELAY_MS);
1114	>	assertTrue(lock.getQueuedThreads().contains(t1));
1115	>	assertTrue(lock.getQueuedThreads().contains(t2));
1116	>	t1.interrupt();
1117	>	Thread.sleep(SHORT_DELAY_MS);
1118	>	assertFalse(lock.getQueuedThreads().contains(t1));
1119	>	assertTrue(lock.getQueuedThreads().contains(t2));
1120	>	lock.writeLock().unlock();
1121	>	Thread.sleep(SHORT_DELAY_MS);
1122	>	assertTrue(lock.getQueuedThreads().isEmpty());
1123	>	t1.join();
1124	>	t2.join();
1125	>	}
1126
1127		/**
1128		* hasWaiters throws NPE if null
1129		*/
1130		public void testHasWaitersNPE() {
1131	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1131	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132		try {
1133		lock.hasWaiters(null);
1134		shouldThrow();
1135	<	} catch (NullPointerException success) {
1368	<	} catch (Exception ex) {
1369	<	unexpectedException();
1370	<	}
1135	>	} catch (NullPointerException success) {}
1136		}
1137
1138		/**
1139		* getWaitQueueLength throws NPE if null
1140		*/
1141		public void testGetWaitQueueLengthNPE() {
1142	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1142	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1143		try {
1144		lock.getWaitQueueLength(null);
1145		shouldThrow();
1146	<	} catch (NullPointerException success) {
1382	<	} catch (Exception ex) {
1383	<	unexpectedException();
1384	<	}
1146	>	} catch (NullPointerException success) {}
1147		}
1148
1149
#	Line 1389 | Line 1151 | public class ReentrantReadWriteLockTest
1151		* getWaitingThreads throws NPE if null
1152		*/
1153		public void testGetWaitingThreadsNPE() {
1154	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1154	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1155		try {
1156		lock.getWaitingThreads(null);
1157		shouldThrow();
1158	<	} catch (NullPointerException success) {
1397	<	} catch (Exception ex) {
1398	<	unexpectedException();
1399	<	}
1158	>	} catch (NullPointerException success) {}
1159		}
1160
1161		/**
1162		* hasWaiters throws IAE if not owned
1163		*/
1164		public void testHasWaitersIAE() {
1165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1166	<	final Condition c = (lock.writeLock().newCondition());
1167	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1165	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1166	>	final Condition c = lock.writeLock().newCondition();
1167	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1168		try {
1169		lock2.hasWaiters(c);
1170		shouldThrow();
1171	<	} catch (IllegalArgumentException success) {
1413	<	} catch (Exception ex) {
1414	<	unexpectedException();
1415	<	}
1171	>	} catch (IllegalArgumentException success) {}
1172		}
1173
1174		/**
1175		* hasWaiters throws IMSE if not locked
1176		*/
1177		public void testHasWaitersIMSE() {
1178	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1179	<	final Condition c = (lock.writeLock().newCondition());
1178	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1179	>	final Condition c = lock.writeLock().newCondition();
1180		try {
1181		lock.hasWaiters(c);
1182		shouldThrow();
1183	<	} catch (IllegalMonitorStateException success) {
1428	<	} catch (Exception ex) {
1429	<	unexpectedException();
1430	<	}
1183	>	} catch (IllegalMonitorStateException success) {}
1184		}
1185
1186
#	Line 1435 | Line 1188 | public class ReentrantReadWriteLockTest
1188		* getWaitQueueLength throws IAE if not owned
1189		*/
1190		public void testGetWaitQueueLengthIAE() {
1191	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1192	<	final Condition c = (lock.writeLock().newCondition());
1193	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1191	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1192	>	final Condition c = lock.writeLock().newCondition();
1193	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1194		try {
1195		lock2.getWaitQueueLength(c);
1196		shouldThrow();
1197	<	} catch (IllegalArgumentException success) {
1445	<	} catch (Exception ex) {
1446	<	unexpectedException();
1447	<	}
1197	>	} catch (IllegalArgumentException success) {}
1198		}
1199
1200		/**
1201		* getWaitQueueLength throws IMSE if not locked
1202		*/
1203		public void testGetWaitQueueLengthIMSE() {
1204	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1205	<	final Condition c = (lock.writeLock().newCondition());
1204	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1205	>	final Condition c = lock.writeLock().newCondition();
1206		try {
1207		lock.getWaitQueueLength(c);
1208		shouldThrow();
1209	<	} catch (IllegalMonitorStateException success) {
1460	<	} catch (Exception ex) {
1461	<	unexpectedException();
1462	<	}
1209	>	} catch (IllegalMonitorStateException success) {}
1210		}
1211
1212
#	Line 1467 | Line 1214 | public class ReentrantReadWriteLockTest
1214		* getWaitingThreads throws IAE if not owned
1215		*/
1216		public void testGetWaitingThreadsIAE() {
1217	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1218	<	final Condition c = (lock.writeLock().newCondition());
1219	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1217	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1218	>	final Condition c = lock.writeLock().newCondition();
1219	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1220		try {
1221		lock2.getWaitingThreads(c);
1222		shouldThrow();
1223	<	} catch (IllegalArgumentException success) {
1477	<	} catch (Exception ex) {
1478	<	unexpectedException();
1479	<	}
1223	>	} catch (IllegalArgumentException success) {}
1224		}
1225
1226		/**
1227		* getWaitingThreads throws IMSE if not locked
1228		*/
1229		public void testGetWaitingThreadsIMSE() {
1230	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1231	<	final Condition c = (lock.writeLock().newCondition());
1230	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1231	>	final Condition c = lock.writeLock().newCondition();
1232		try {
1233		lock.getWaitingThreads(c);
1234		shouldThrow();
1235	<	} catch (IllegalMonitorStateException success) {
1492	<	} catch (Exception ex) {
1493	<	unexpectedException();
1494	<	}
1235	>	} catch (IllegalMonitorStateException success) {}
1236		}
1237
1238
1239		/**
1240		* hasWaiters returns true when a thread is waiting, else false
1241		*/
1242	<	public void testHasWaiters() {
1243	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	<	final Condition c = (lock.writeLock().newCondition());
1245	<	Thread t = new Thread(new Runnable() {
1246	<	public void run() {
1247	<	try {
1248	<	lock.writeLock().lock();
1249	<	threadAssertFalse(lock.hasWaiters(c));
1250	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1251	<	c.await();
1252	<	lock.writeLock().unlock();
1512	<	}
1513	<	catch(InterruptedException e) {
1514	<	threadUnexpectedException();
1515	<	}
1516	<	}
1517	<	});
1242	>	public void testHasWaiters() throws InterruptedException {
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	>	final Condition c = lock.writeLock().newCondition();
1245	>	Thread t = new Thread(new CheckedRunnable() {
1246	>	public void realRun() throws InterruptedException {
1247	>	lock.writeLock().lock();
1248	>	threadAssertFalse(lock.hasWaiters(c));
1249	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1250	>	c.await();
1251	>	lock.writeLock().unlock();
1252	>	}});
1253
1254	<	try {
1255	<	t.start();
1256	<	Thread.sleep(SHORT_DELAY_MS);
1257	<	lock.writeLock().lock();
1258	<	assertTrue(lock.hasWaiters(c));
1259	<	assertEquals(1, lock.getWaitQueueLength(c));
1260	<	c.signal();
1261	<	lock.writeLock().unlock();
1262	<	Thread.sleep(SHORT_DELAY_MS);
1263	<	lock.writeLock().lock();
1264	<	assertFalse(lock.hasWaiters(c));
1265	<	assertEquals(0, lock.getWaitQueueLength(c));
1266	<	lock.writeLock().unlock();
1267	<	t.join(SHORT_DELAY_MS);
1533	<	assertFalse(t.isAlive());
1534	<	}
1535	<	catch (Exception ex) {
1536	<	unexpectedException();
1537	<	}
1254	>	t.start();
1255	>	Thread.sleep(SHORT_DELAY_MS);
1256	>	lock.writeLock().lock();
1257	>	assertTrue(lock.hasWaiters(c));
1258	>	assertEquals(1, lock.getWaitQueueLength(c));
1259	>	c.signal();
1260	>	lock.writeLock().unlock();
1261	>	Thread.sleep(SHORT_DELAY_MS);
1262	>	lock.writeLock().lock();
1263	>	assertFalse(lock.hasWaiters(c));
1264	>	assertEquals(0, lock.getWaitQueueLength(c));
1265	>	lock.writeLock().unlock();
1266	>	t.join(SHORT_DELAY_MS);
1267	>	assertFalse(t.isAlive());
1268		}
1269
1270		/**
1271		* getWaitQueueLength returns number of waiting threads
1272		*/
1273	<	public void testGetWaitQueueLength() {
1274	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1275	<	final Condition c = (lock.writeLock().newCondition());
1276	<	Thread t = new Thread(new Runnable() {
1277	<	public void run() {
1278	<	try {
1279	<	lock.writeLock().lock();
1280	<	threadAssertFalse(lock.hasWaiters(c));
1281	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1282	<	c.await();
1283	<	lock.writeLock().unlock();
1554	<	}
1555	<	catch(InterruptedException e) {
1556	<	threadUnexpectedException();
1557	<	}
1558	<	}
1559	<	});
1273	>	public void testGetWaitQueueLength() throws InterruptedException {
1274	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1275	>	final Condition c = lock.writeLock().newCondition();
1276	>	Thread t = new Thread(new CheckedRunnable() {
1277	>	public void realRun() throws InterruptedException {
1278	>	lock.writeLock().lock();
1279	>	threadAssertFalse(lock.hasWaiters(c));
1280	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1281	>	c.await();
1282	>	lock.writeLock().unlock();
1283	>	}});
1284
1285	<	try {
1286	<	t.start();
1287	<	Thread.sleep(SHORT_DELAY_MS);
1288	<	lock.writeLock().lock();
1289	<	assertTrue(lock.hasWaiters(c));
1290	<	assertEquals(1, lock.getWaitQueueLength(c));
1291	<	c.signal();
1292	<	lock.writeLock().unlock();
1293	<	Thread.sleep(SHORT_DELAY_MS);
1294	<	lock.writeLock().lock();
1295	<	assertFalse(lock.hasWaiters(c));
1296	<	assertEquals(0, lock.getWaitQueueLength(c));
1297	<	lock.writeLock().unlock();
1298	<	t.join(SHORT_DELAY_MS);
1575	<	assertFalse(t.isAlive());
1576	<	}
1577	<	catch (Exception ex) {
1578	<	unexpectedException();
1579	<	}
1285	>	t.start();
1286	>	Thread.sleep(SHORT_DELAY_MS);
1287	>	lock.writeLock().lock();
1288	>	assertTrue(lock.hasWaiters(c));
1289	>	assertEquals(1, lock.getWaitQueueLength(c));
1290	>	c.signal();
1291	>	lock.writeLock().unlock();
1292	>	Thread.sleep(SHORT_DELAY_MS);
1293	>	lock.writeLock().lock();
1294	>	assertFalse(lock.hasWaiters(c));
1295	>	assertEquals(0, lock.getWaitQueueLength(c));
1296	>	lock.writeLock().unlock();
1297	>	t.join(SHORT_DELAY_MS);
1298	>	assertFalse(t.isAlive());
1299		}
1300
1301
1302		/**
1303		* getWaitingThreads returns only and all waiting threads
1304		*/
1305	<	public void testGetWaitingThreads() {
1306	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1305	>	public void testGetWaitingThreads() throws InterruptedException {
1306	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307		final Condition c = lock.writeLock().newCondition();
1308	<	Thread t1 = new Thread(new Runnable() {
1309	<	public void run() {
1310	<	try {
1311	<	lock.writeLock().lock();
1312	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1313	<	c.await();
1314	<	lock.writeLock().unlock();
1596	<	}
1597	<	catch(InterruptedException e) {
1598	<	threadUnexpectedException();
1599	<	}
1600	<	}
1601	<	});
1602	<
1603	<	Thread t2 = new Thread(new Runnable() {
1604	<	public void run() {
1605	<	try {
1606	<	lock.writeLock().lock();
1607	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1608	<	c.await();
1609	<	lock.writeLock().unlock();
1610	<	}
1611	<	catch(InterruptedException e) {
1612	<	threadUnexpectedException();
1613	<	}
1614	<	}
1615	<	});
1308	>	Thread t1 = new Thread(new CheckedRunnable() {
1309	>	public void realRun() throws InterruptedException {
1310	>	lock.writeLock().lock();
1311	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1312	>	c.await();
1313	>	lock.writeLock().unlock();
1314	>	}});
1315
1316	<	try {
1317	<	lock.writeLock().lock();
1318	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1319	<	lock.writeLock().unlock();
1320	<	t1.start();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1322	<	t2.start();
1323	<	Thread.sleep(SHORT_DELAY_MS);
1324	<	lock.writeLock().lock();
1325	<	assertTrue(lock.hasWaiters(c));
1326	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1327	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1328	<	c.signalAll();
1329	<	lock.writeLock().unlock();
1330	<	Thread.sleep(SHORT_DELAY_MS);
1331	<	lock.writeLock().lock();
1332	<	assertFalse(lock.hasWaiters(c));
1333	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1334	<	lock.writeLock().unlock();
1335	<	t1.join(SHORT_DELAY_MS);
1336	<	t2.join(SHORT_DELAY_MS);
1337	<	assertFalse(t1.isAlive());
1338	<	assertFalse(t2.isAlive());
1339	<	}
1340	<	catch (Exception ex) {
1341	<	unexpectedException();
1342	<	}
1316	>	Thread t2 = new Thread(new CheckedRunnable() {
1317	>	public void realRun() throws InterruptedException {
1318	>	lock.writeLock().lock();
1319	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1320	>	c.await();
1321	>	lock.writeLock().unlock();
1322	>	}});
1323	>
1324	>	lock.writeLock().lock();
1325	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1326	>	lock.writeLock().unlock();
1327	>	t1.start();
1328	>	Thread.sleep(SHORT_DELAY_MS);
1329	>	t2.start();
1330	>	Thread.sleep(SHORT_DELAY_MS);
1331	>	lock.writeLock().lock();
1332	>	assertTrue(lock.hasWaiters(c));
1333	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1334	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1335	>	c.signalAll();
1336	>	lock.writeLock().unlock();
1337	>	Thread.sleep(SHORT_DELAY_MS);
1338	>	lock.writeLock().lock();
1339	>	assertFalse(lock.hasWaiters(c));
1340	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1341	>	lock.writeLock().unlock();
1342	>	t1.join(SHORT_DELAY_MS);
1343	>	t2.join(SHORT_DELAY_MS);
1344	>	assertFalse(t1.isAlive());
1345	>	assertFalse(t2.isAlive());
1346		}
1347
1348		/**

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