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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 1.56 by jsr166, Tue May 3 06:08:49 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
36		/**
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);
58		}
59	<	public Collection<Thread> getWaitingThreads(Condition c) {
60	<	return super.getWaitingThreads(c);
59	>	}
60	>
61	>	/**
62	>	* Releases write lock, checking that it had a hold count of 1.
63	>	*/
64	>	void releaseWriteLock(ReentrantReadWriteLock lock) {
65	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
66	>	assertTrue(writeLock.isHeldByCurrentThread());
67	>	writeLock.unlock();
68	>	assertFalse(writeLock.isHeldByCurrentThread());
69	>	}
70	>
71	>	/**
72	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
73	>	*/
74	>	void waitForQueuedThread(ReentrantReadWriteLock lock, Thread t) {
75	>	long startTime = System.nanoTime();
76	>	while (!lock.hasQueuedThread(t)) {
77	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
78	>	throw new AssertionError("timed out");
79	>	Thread.yield();
80		}
81		}
82
83		/**
84	+	* Checks that lock is not write-locked.
85	+	*/
86	+	void assertNotWriteLocked(ReentrantReadWriteLock lock) {
87	+	assertFalse(lock.isWriteLocked());
88	+	assertFalse(lock.isWriteLockedByCurrentThread());
89	+	assertEquals(0, lock.getWriteHoldCount());
90	+	}
91	+
92	+	/**
93	+	* Checks that condition c has no waiters.
94	+	*/
95	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
96	+	assertHasWaiters(lock, c, new Thread[] {});
97	+	}
98	+
99	+	/**
100	+	* Checks that condition c has exactly the given waiter threads.
101	+	*/
102	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
103	+	Thread... threads) {
104	+	lock.writeLock().lock();
105	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
106	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
107	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
108	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
109	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
110	+	new HashSet<Thread>(Arrays.asList(threads)));
111	+	lock.writeLock().unlock();
112	+	}
113	+
114	+	/**
115		* Constructor sets given fairness, and is in unlocked state
116		*/
117	<	public void testConstructor() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
117	>	public void testConstructor() {
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
119		assertFalse(rl.isFair());
120		assertFalse(rl.isWriteLocked());
121		assertEquals(0, rl.getReadLockCount());
122	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
122	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
123		assertTrue(r2.isFair());
124		assertFalse(r2.isWriteLocked());
125		assertEquals(0, r2.getReadLockCount());
126	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
127	+	assertFalse(r3.isFair());
128	+	assertFalse(r3.isWriteLocked());
129	+	assertEquals(0, r3.getReadLockCount());
130		}
131
132		/**
133		* write-locking and read-locking an unlocked lock succeed
134		*/
135	<	public void testLock() {
136	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
135	>	public void testLock() {
136	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
137		rl.writeLock().lock();
138		assertTrue(rl.isWriteLocked());
139		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 101 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
104	–
157		/**
158		* locking an unlocked fair lock succeeds
159		*/
160	<	public void testFairLock() {
161	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
160	>	public void testFairLock() {
161	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
162		rl.writeLock().lock();
163		assertTrue(rl.isWriteLocked());
164		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 131 | Line 183 | public class ReentrantReadWriteLockTest
183		* getWriteHoldCount returns number of recursive holds
184		*/
185		public void testGetWriteHoldCount() {
186	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	for(int i = 1; i <= SIZE; i++) {
188	<	lock.writeLock().lock();
189	<	assertEquals(i,lock.getWriteHoldCount());
190	<	}
191	<	for(int i = SIZE; i > 0; i--) {
192	<	lock.writeLock().unlock();
193	<	assertEquals(i-1,lock.getWriteHoldCount());
194	<	}
186	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	>	for (int i = 1; i <= SIZE; i++) {
188	>	lock.writeLock().lock();
189	>	assertEquals(i,lock.getWriteHoldCount());
190	>	}
191	>	for (int i = SIZE; i > 0; i--) {
192	>	lock.writeLock().unlock();
193	>	assertEquals(i-1,lock.getWriteHoldCount());
194	>	}
195		}
196
197		/**
198		* WriteLock.getHoldCount returns number of recursive holds
199		*/
200		public void testGetHoldCount() {
201	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	for(int i = 1; i <= SIZE; i++) {
203	<	lock.writeLock().lock();
204	<	assertEquals(i,lock.writeLock().getHoldCount());
205	<	}
206	<	for(int i = SIZE; i > 0; i--) {
207	<	lock.writeLock().unlock();
208	<	assertEquals(i-1,lock.writeLock().getHoldCount());
209	<	}
201	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	for (int i = 1; i <= SIZE; i++) {
203	>	lock.writeLock().lock();
204	>	assertEquals(i,lock.writeLock().getHoldCount());
205	>	}
206	>	for (int i = SIZE; i > 0; i--) {
207	>	lock.writeLock().unlock();
208	>	assertEquals(i-1,lock.writeLock().getHoldCount());
209	>	}
210		}
211
212		/**
213		* getReadHoldCount returns number of recursive holds
214		*/
215		public void testGetReadHoldCount() {
216	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	<	for(int i = 1; i <= SIZE; i++) {
218	<	lock.readLock().lock();
219	<	assertEquals(i,lock.getReadHoldCount());
220	<	}
221	<	for(int i = SIZE; i > 0; i--) {
222	<	lock.readLock().unlock();
223	<	assertEquals(i-1,lock.getReadHoldCount());
224	<	}
216	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	>	for (int i = 1; i <= SIZE; i++) {
218	>	lock.readLock().lock();
219	>	assertEquals(i,lock.getReadHoldCount());
220	>	}
221	>	for (int i = SIZE; i > 0; i--) {
222	>	lock.readLock().unlock();
223	>	assertEquals(i-1,lock.getReadHoldCount());
224	>	}
225		}
174	–
226
227		/**
228		* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testUnlock_IllegalMonitorStateException() {
231	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	<	try {
233	<	rl.writeLock().unlock();
234	<	shouldThrow();
235	<	} catch(IllegalMonitorStateException success){}
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	>	try {
233	>	rl.writeLock().unlock();
234	>	shouldThrow();
235	>	} catch (IllegalMonitorStateException success) {}
236		}
237
238	+	/**
239	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
240	+	*/
241	+	public void testReadUnlock_IllegalMonitorStateException() {
242	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
243	+	try {
244	+	rl.readLock().unlock();
245	+	shouldThrow();
246	+	} catch (IllegalMonitorStateException success) {}
247	+	}
248
249		/**
250		* write-lockInterruptibly is interruptible
251		*/
252	<	public void testWriteLockInterruptibly_Interrupted() {
253	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run() {
256	<	try {
257	<	lock.writeLock().lockInterruptibly();
258	<	lock.writeLock().unlock();
259	<	lock.writeLock().lockInterruptibly();
260	<	lock.writeLock().unlock();
261	<	} catch(InterruptedException success){}
262	<	}
263	<	});
264	<	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	<	}
252	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
253	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	>	lock.writeLock().lock();
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256	>	public void realRun() throws InterruptedException {
257	>	lock.writeLock().lockInterruptibly();
258	>	}});
259	>
260	>	waitForQueuedThread(lock, t);
261	>	t.interrupt();
262	>	awaitTermination(t);
263	>	releaseWriteLock(lock);
264	>	}
265
266		/**
267		* timed write-tryLock is interruptible
268		*/
269	<	public void testWriteTryLock_Interrupted() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.writeLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	try {
275	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
276	<	} catch(InterruptedException success){}
277	<	}
278	<	});
279	<	try {
280	<	t.start();
230	<	t.interrupt();
231	<	lock.writeLock().unlock();
232	<	t.join();
233	<	} catch(Exception e){
234	<	unexpectedException();
235	<	}
269	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
273	>	public void realRun() throws InterruptedException {
274	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
275	>	}});
276	>
277	>	waitForQueuedThread(lock, t);
278	>	t.interrupt();
279	>	awaitTermination(t);
280	>	releaseWriteLock(lock);
281		}
282
283		/**
284		* read-lockInterruptibly is interruptible
285		*/
286	<	public void testReadLockInterruptibly_Interrupted() {
287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.writeLock().lock();
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run() {
291	<	try {
292	<	lock.readLock().lockInterruptibly();
293	<	} catch(InterruptedException success){}
294	<	}
295	<	});
296	<	try {
297	<	t.start();
298	<	Thread.sleep(SHORT_DELAY_MS);
254	<	t.interrupt();
255	<	lock.writeLock().unlock();
256	<	t.join();
257	<	} catch(Exception e){
258	<	unexpectedException();
259	<	}
260	<	}
286	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
287	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	>	lock.writeLock().lock();
289	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
290	>	public void realRun() throws InterruptedException {
291	>	lock.readLock().lockInterruptibly();
292	>	}});
293	>
294	>	waitForQueuedThread(lock, t);
295	>	t.interrupt();
296	>	awaitTermination(t);
297	>	releaseWriteLock(lock);
298	>	}
299
300		/**
301		* timed read-tryLock is interruptible
302		*/
303	<	public void testReadTryLock_Interrupted() {
304	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	<	lock.writeLock().lock();
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	try {
309	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
310	<	threadShouldThrow();
311	<	} catch(InterruptedException success){}
312	<	}
313	<	});
314	<	try {
277	<	t.start();
278	<	t.interrupt();
279	<	t.join();
280	<	} catch(Exception e){
281	<	unexpectedException();
282	<	}
303	>	public void testReadTryLock_Interrupted() throws InterruptedException {
304	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	>	lock.writeLock().lock();
306	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
309	>	}});
310	>
311	>	waitForQueuedThread(lock, t);
312	>	t.interrupt();
313	>	awaitTermination(t);
314	>	releaseWriteLock(lock);
315		}
316
285	–
317		/**
318		* write-tryLock fails if locked
319		*/
320	<	public void testWriteTryLockWhenLocked() {
321	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	<	lock.writeLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	threadAssertFalse(lock.writeLock().tryLock());
326	<	}
327	<	});
328	<	try {
329	<	t.start();
330	<	t.join();
300	<	lock.writeLock().unlock();
301	<	} catch(Exception e){
302	<	unexpectedException();
303	<	}
304	<	}
320	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
321	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	>	lock.writeLock().lock();
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	assertFalse(lock.writeLock().tryLock());
326	>	}});
327	>
328	>	awaitTermination(t);
329	>	releaseWriteLock(lock);
330	>	}
331
332		/**
333		* read-tryLock fails if locked
334		*/
335	<	public void testReadTryLockWhenLocked() {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	threadAssertFalse(lock.readLock().tryLock());
341	<	}
342	<	});
343	<	try {
344	<	t.start();
345	<	t.join();
320	<	lock.writeLock().unlock();
321	<	} catch(Exception e){
322	<	unexpectedException();
323	<	}
324	<	}
335	>	public void testReadTryLockWhenLocked() throws InterruptedException {
336	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	lock.writeLock().lock();
338	>	Thread t = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	assertFalse(lock.readLock().tryLock());
341	>	}});
342	>
343	>	awaitTermination(t);
344	>	releaseWriteLock(lock);
345	>	}
346
347		/**
348		* Multiple threads can hold a read lock when not write-locked
349		*/
350	<	public void testMultipleReadLocks() {
351	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	<	lock.readLock().lock();
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	threadAssertTrue(lock.readLock().tryLock());
356	<	lock.readLock().unlock();
357	<	}
358	<	});
359	<	try {
360	<	t.start();
361	<	t.join();
341	<	lock.readLock().unlock();
342	<	} catch(Exception e){
343	<	unexpectedException();
344	<	}
345	<	}
350	>	public void testMultipleReadLocks() throws InterruptedException {
351	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	>	lock.readLock().lock();
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() {
355	>	assertTrue(lock.readLock().tryLock());
356	>	lock.readLock().unlock();
357	>	}});
358	>
359	>	awaitTermination(t);
360	>	lock.readLock().unlock();
361	>	}
362
363		/**
364	<	* A writelock succeeds after reading threads unlock
364	>	* A writelock succeeds only after reading threads unlock
365		*/
366	<	public void testWriteAfterMultipleReadLocks() {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	lock.readLock().lock();
369	<	Thread t1 = new Thread(new Runnable() {
370	<	public void run() {
371	<	lock.readLock().lock();
372	<	lock.readLock().unlock();
373	<	}
374	<	});
375	<	Thread t2 = new Thread(new Runnable() {
376	<	public void run() {
377	<	lock.writeLock().lock();
378	<	lock.writeLock().unlock();
363	<	}
364	<	});
366	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t1 = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	lock.readLock().lock();
372	>	lock.readLock().unlock();
373	>	}});
374	>	Thread t2 = newStartedThread(new CheckedRunnable() {
375	>	public void realRun() {
376	>	lock.writeLock().lock();
377	>	lock.writeLock().unlock();
378	>	}});
379
380	<	try {
381	<	t1.start();
382	<	t2.start();
383	<	Thread.sleep(SHORT_DELAY_MS);
384	<	lock.readLock().unlock();
385	<	t1.join(MEDIUM_DELAY_MS);
372	<	t2.join(MEDIUM_DELAY_MS);
373	<	assertTrue(!t1.isAlive());
374	<	assertTrue(!t2.isAlive());
375	<
376	<	} catch(Exception e){
377	<	unexpectedException();
378	<	}
379	<	}
380	>	awaitTermination(t1);
381	>	waitForQueuedThread(lock, t2);
382	>	assertNotWriteLocked(lock);
383	>	lock.readLock().unlock();
384	>	awaitTermination(t2);
385	>	}
386
387		/**
388	<	* Readlocks succeed after a writing thread unlocks
388	>	* Readlocks succeed only after a writing thread unlocks
389		*/
390	<	public void testReadAfterWriteLock() {
391	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
392	<	lock.writeLock().lock();
393	<	Thread t1 = new Thread(new Runnable() {
394	<	public void run() {
395	<	lock.readLock().lock();
396	<	lock.readLock().unlock();
397	<	}
398	<	});
399	<	Thread t2 = new Thread(new Runnable() {
400	<	public void run() {
401	<	lock.readLock().lock();
402	<	lock.readLock().unlock();
403	<	}
404	<	});
405	<
406	<	try {
407	<	t1.start();
408	<	t2.start();
409	<	Thread.sleep(SHORT_DELAY_MS);
404	<	lock.writeLock().unlock();
405	<	t1.join(MEDIUM_DELAY_MS);
406	<	t2.join(MEDIUM_DELAY_MS);
407	<	assertTrue(!t1.isAlive());
408	<	assertTrue(!t2.isAlive());
409	<
410	<	} catch(Exception e){
411	<	unexpectedException();
412	<	}
413	<	}
390	>	public void testReadAfterWriteLock() throws InterruptedException {
391	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
392	>	lock.writeLock().lock();
393	>	Thread t1 = newStartedThread(new CheckedRunnable() {
394	>	public void realRun() {
395	>	lock.readLock().lock();
396	>	lock.readLock().unlock();
397	>	}});
398	>	Thread t2 = newStartedThread(new CheckedRunnable() {
399	>	public void realRun() {
400	>	lock.readLock().lock();
401	>	lock.readLock().unlock();
402	>	}});
403	>
404	>	waitForQueuedThread(lock, t1);
405	>	waitForQueuedThread(lock, t2);
406	>	releaseWriteLock(lock);
407	>	awaitTermination(t1);
408	>	awaitTermination(t2);
409	>	}
410
411		/**
412		* Read trylock succeeds if write locked by current thread
413		*/
414	<	public void testReadHoldingWriteLock() {
415	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
416	<	lock.writeLock().lock();
414	>	public void testReadHoldingWriteLock() {
415	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
416	>	lock.writeLock().lock();
417		assertTrue(lock.readLock().tryLock());
418		lock.readLock().unlock();
419		lock.writeLock().unlock();
420	<	}
420	>	}
421
422		/**
423		* Read lock succeeds if write locked by current thread even if
424		* other threads are waiting for readlock
425		*/
426	<	public void testReadHoldingWriteLock2() {
427	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
428	<	lock.writeLock().lock();
429	<	Thread t1 = new Thread(new Runnable() {
430	<	public void run() {
435	<	lock.readLock().lock();
436	<	lock.readLock().unlock();
437	<	}
438	<	});
439	<	Thread t2 = new Thread(new Runnable() {
440	<	public void run() {
441	<	lock.readLock().lock();
442	<	lock.readLock().unlock();
443	<	}
444	<	});
426	>	public void testReadHoldingWriteLock2() throws InterruptedException {
427	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
428	>	lock.writeLock().lock();
429	>	lock.readLock().lock();
430	>	lock.readLock().unlock();
431
432	<	try {
433	<	t1.start();
434	<	t2.start();
435	<	lock.readLock().lock();
436	<	lock.readLock().unlock();
437	<	Thread.sleep(SHORT_DELAY_MS);
438	<	lock.readLock().lock();
439	<	lock.readLock().unlock();
440	<	lock.writeLock().unlock();
441	<	t1.join(MEDIUM_DELAY_MS);
442	<	t2.join(MEDIUM_DELAY_MS);
443	<	assertTrue(!t1.isAlive());
444	<	assertTrue(!t2.isAlive());
445	<
446	<	} catch(Exception e){
447	<	unexpectedException();
448	<	}
449	<	}
432	>	Thread t1 = newStartedThread(new CheckedRunnable() {
433	>	public void realRun() {
434	>	lock.readLock().lock();
435	>	lock.readLock().unlock();
436	>	}});
437	>	Thread t2 = newStartedThread(new CheckedRunnable() {
438	>	public void realRun() {
439	>	lock.readLock().lock();
440	>	lock.readLock().unlock();
441	>	}});
442	>
443	>	waitForQueuedThread(lock, t1);
444	>	waitForQueuedThread(lock, t2);
445	>	assertTrue(lock.isWriteLockedByCurrentThread());
446	>	lock.readLock().lock();
447	>	lock.readLock().unlock();
448	>	releaseWriteLock(lock);
449	>	awaitTermination(t1);
450	>	awaitTermination(t2);
451	>	}
452
453		/**
454	<	*  Read lock succeeds if write locked by current thread even if
454	>	* Read lock succeeds if write locked by current thread even if
455		* other threads are waiting for writelock
456		*/
457	<	public void testReadHoldingWriteLock3() {
458	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	<	lock.writeLock().lock();
460	<	Thread t1 = new Thread(new Runnable() {
461	<	public void run() {
474	<	lock.writeLock().lock();
475	<	lock.writeLock().unlock();
476	<	}
477	<	});
478	<	Thread t2 = new Thread(new Runnable() {
479	<	public void run() {
480	<	lock.writeLock().lock();
481	<	lock.writeLock().unlock();
482	<	}
483	<	});
457	>	public void testReadHoldingWriteLock3() throws InterruptedException {
458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	>	lock.writeLock().lock();
460	>	lock.readLock().lock();
461	>	lock.readLock().unlock();
462
463	<	try {
464	<	t1.start();
465	<	t2.start();
466	<	lock.readLock().lock();
467	<	lock.readLock().unlock();
468	<	Thread.sleep(SHORT_DELAY_MS);
469	<	lock.readLock().lock();
470	<	lock.readLock().unlock();
471	<	lock.writeLock().unlock();
472	<	t1.join(MEDIUM_DELAY_MS);
495	<	t2.join(MEDIUM_DELAY_MS);
496	<	assertTrue(!t1.isAlive());
497	<	assertTrue(!t2.isAlive());
498	<
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
502	<	}
463	>	Thread t1 = newStartedThread(new CheckedRunnable() {
464	>	public void realRun() {
465	>	lock.writeLock().lock();
466	>	lock.writeLock().unlock();
467	>	}});
468	>	Thread t2 = newStartedThread(new CheckedRunnable() {
469	>	public void realRun() {
470	>	lock.writeLock().lock();
471	>	lock.writeLock().unlock();
472	>	}});
473
474	+	waitForQueuedThread(lock, t1);
475	+	waitForQueuedThread(lock, t2);
476	+	assertTrue(lock.isWriteLockedByCurrentThread());
477	+	lock.readLock().lock();
478	+	lock.readLock().unlock();
479	+	releaseWriteLock(lock);
480	+	awaitTermination(t1);
481	+	awaitTermination(t2);
482	+	}
483
484		/**
485	<	*  Write lock succeeds if write locked by current thread even if
485	>	* Write lock succeeds if write locked by current thread even if
486		* other threads are waiting for writelock
487		*/
488	<	public void testWriteHoldingWriteLock4() {
489	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
490	<	lock.writeLock().lock();
491	<	Thread t1 = new Thread(new Runnable() {
492	<	public void run() {
514	<	lock.writeLock().lock();
515	<	lock.writeLock().unlock();
516	<	}
517	<	});
518	<	Thread t2 = new Thread(new Runnable() {
519	<	public void run() {
520	<	lock.writeLock().lock();
521	<	lock.writeLock().unlock();
522	<	}
523	<	});
488	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
489	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
490	>	lock.writeLock().lock();
491	>	lock.writeLock().lock();
492	>	lock.writeLock().unlock();
493
494	<	try {
495	<	t1.start();
496	<	t2.start();
497	<	lock.writeLock().lock();
498	<	lock.writeLock().unlock();
499	<	Thread.sleep(SHORT_DELAY_MS);
500	<	lock.writeLock().lock();
501	<	lock.writeLock().unlock();
502	<	lock.writeLock().unlock();
503	<	t1.join(MEDIUM_DELAY_MS);
535	<	t2.join(MEDIUM_DELAY_MS);
536	<	assertTrue(!t1.isAlive());
537	<	assertTrue(!t2.isAlive());
538	<
539	<	} catch(Exception e){
540	<	unexpectedException();
541	<	}
542	<	}
494	>	Thread t1 = newStartedThread(new CheckedRunnable() {
495	>	public void realRun() {
496	>	lock.writeLock().lock();
497	>	lock.writeLock().unlock();
498	>	}});
499	>	Thread t2 = newStartedThread(new CheckedRunnable() {
500	>	public void realRun() {
501	>	lock.writeLock().lock();
502	>	lock.writeLock().unlock();
503	>	}});
504
505	+	waitForQueuedThread(lock, t1);
506	+	waitForQueuedThread(lock, t2);
507	+	assertTrue(lock.isWriteLockedByCurrentThread());
508	+	assertEquals(1, lock.getWriteHoldCount());
509	+	lock.writeLock().lock();
510	+	assertTrue(lock.isWriteLockedByCurrentThread());
511	+	assertEquals(2, lock.getWriteHoldCount());
512	+	lock.writeLock().unlock();
513	+	releaseWriteLock(lock);
514	+	awaitTermination(t1);
515	+	awaitTermination(t2);
516	+	}
517
518		/**
519		* Fair Read trylock succeeds if write locked by current thread
520		*/
521	<	public void testReadHoldingWriteLockFair() {
522	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
523	<	lock.writeLock().lock();
521	>	public void testReadHoldingWriteLockFair() {
522	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
523	>	lock.writeLock().lock();
524		assertTrue(lock.readLock().tryLock());
525		lock.readLock().unlock();
526		lock.writeLock().unlock();
527	<	}
527	>	}
528
529		/**
530		* Fair Read lock succeeds if write locked by current thread even if
531		* other threads are waiting for readlock
532		*/
533	<	public void testReadHoldingWriteLockFair2() {
534	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
535	<	lock.writeLock().lock();
536	<	Thread t1 = new Thread(new Runnable() {
537	<	public void run() {
565	<	lock.readLock().lock();
566	<	lock.readLock().unlock();
567	<	}
568	<	});
569	<	Thread t2 = new Thread(new Runnable() {
570	<	public void run() {
571	<	lock.readLock().lock();
572	<	lock.readLock().unlock();
573	<	}
574	<	});
575	<
576	<	try {
577	<	t1.start();
578	<	t2.start();
579	<	lock.readLock().lock();
580	<	lock.readLock().unlock();
581	<	Thread.sleep(SHORT_DELAY_MS);
582	<	lock.readLock().lock();
583	<	lock.readLock().unlock();
584	<	lock.writeLock().unlock();
585	<	t1.join(MEDIUM_DELAY_MS);
586	<	t2.join(MEDIUM_DELAY_MS);
587	<	assertTrue(!t1.isAlive());
588	<	assertTrue(!t2.isAlive());
589	<
590	<	} catch(Exception e){
591	<	unexpectedException();
592	<	}
593	<	}
533	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
534	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
535	>	lock.writeLock().lock();
536	>	lock.readLock().lock();
537	>	lock.readLock().unlock();
538
539	+	Thread t1 = newStartedThread(new CheckedRunnable() {
540	+	public void realRun() {
541	+	lock.readLock().lock();
542	+	lock.readLock().unlock();
543	+	}});
544	+	Thread t2 = newStartedThread(new CheckedRunnable() {
545	+	public void realRun() {
546	+	lock.readLock().lock();
547	+	lock.readLock().unlock();
548	+	}});
549	+
550	+	waitForQueuedThread(lock, t1);
551	+	waitForQueuedThread(lock, t2);
552	+	assertTrue(lock.isWriteLockedByCurrentThread());
553	+	lock.readLock().lock();
554	+	lock.readLock().unlock();
555	+	releaseWriteLock(lock);
556	+	awaitTermination(t1);
557	+	awaitTermination(t2);
558	+	}
559
560		/**
561		* Fair Read lock succeeds if write locked by current thread even if
562		* other threads are waiting for writelock
563		*/
564	<	public void testReadHoldingWriteLockFair3() {
565	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
566	<	lock.writeLock().lock();
567	<	Thread t1 = new Thread(new Runnable() {
568	<	public void run() {
605	<	lock.writeLock().lock();
606	<	lock.writeLock().unlock();
607	<	}
608	<	});
609	<	Thread t2 = new Thread(new Runnable() {
610	<	public void run() {
611	<	lock.writeLock().lock();
612	<	lock.writeLock().unlock();
613	<	}
614	<	});
564	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
565	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
566	>	lock.writeLock().lock();
567	>	lock.readLock().lock();
568	>	lock.readLock().unlock();
569
570	<	try {
571	<	t1.start();
572	<	t2.start();
573	<	lock.readLock().lock();
574	<	lock.readLock().unlock();
575	<	Thread.sleep(SHORT_DELAY_MS);
576	<	lock.readLock().lock();
577	<	lock.readLock().unlock();
578	<	lock.writeLock().unlock();
579	<	t1.join(MEDIUM_DELAY_MS);
626	<	t2.join(MEDIUM_DELAY_MS);
627	<	assertTrue(!t1.isAlive());
628	<	assertTrue(!t2.isAlive());
629	<
630	<	} catch(Exception e){
631	<	unexpectedException();
632	<	}
633	<	}
570	>	Thread t1 = newStartedThread(new CheckedRunnable() {
571	>	public void realRun() {
572	>	lock.writeLock().lock();
573	>	lock.writeLock().unlock();
574	>	}});
575	>	Thread t2 = newStartedThread(new CheckedRunnable() {
576	>	public void realRun() {
577	>	lock.writeLock().lock();
578	>	lock.writeLock().unlock();
579	>	}});
580
581	+	waitForQueuedThread(lock, t1);
582	+	waitForQueuedThread(lock, t2);
583	+	assertTrue(lock.isWriteLockedByCurrentThread());
584	+	lock.readLock().lock();
585	+	lock.readLock().unlock();
586	+	releaseWriteLock(lock);
587	+	awaitTermination(t1);
588	+	awaitTermination(t2);
589	+	}
590
591		/**
592		* Fair Write lock succeeds if write locked by current thread even if
593		* other threads are waiting for writelock
594		*/
595	<	public void testWriteHoldingWriteLockFair4() {
596	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
597	<	lock.writeLock().lock();
598	<	Thread t1 = new Thread(new Runnable() {
599	<	public void run() {
600	<	lock.writeLock().lock();
601	<	lock.writeLock().unlock();
602	<	}
603	<	});
604	<	Thread t2 = new Thread(new Runnable() {
605	<	public void run() {
606	<	lock.writeLock().lock();
607	<	lock.writeLock().unlock();
653	<	}
654	<	});
655	<
656	<	try {
657	<	t1.start();
658	<	t2.start();
659	<	Thread.sleep(SHORT_DELAY_MS);
660	<	assertTrue(lock.isWriteLockedByCurrentThread());
661	<	assertTrue(lock.getWriteHoldCount() == 1);
662	<	lock.writeLock().lock();
663	<	assertTrue(lock.getWriteHoldCount() == 2);
664	<	lock.writeLock().unlock();
665	<	lock.writeLock().lock();
666	<	lock.writeLock().unlock();
667	<	lock.writeLock().unlock();
668	<	t1.join(MEDIUM_DELAY_MS);
669	<	t2.join(MEDIUM_DELAY_MS);
670	<	assertTrue(!t1.isAlive());
671	<	assertTrue(!t2.isAlive());
672	<
673	<	} catch(Exception e){
674	<	unexpectedException();
675	<	}
676	<	}
595	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
596	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
597	>	lock.writeLock().lock();
598	>	Thread t1 = newStartedThread(new CheckedRunnable() {
599	>	public void realRun() {
600	>	lock.writeLock().lock();
601	>	lock.writeLock().unlock();
602	>	}});
603	>	Thread t2 = newStartedThread(new CheckedRunnable() {
604	>	public void realRun() {
605	>	lock.writeLock().lock();
606	>	lock.writeLock().unlock();
607	>	}});
608
609	+	waitForQueuedThread(lock, t1);
610	+	waitForQueuedThread(lock, t2);
611	+	assertTrue(lock.isWriteLockedByCurrentThread());
612	+	assertEquals(1, lock.getWriteHoldCount());
613	+	lock.writeLock().lock();
614	+	assertEquals(2, lock.getWriteHoldCount());
615	+	lock.writeLock().unlock();
616	+	lock.writeLock().lock();
617	+	lock.writeLock().unlock();
618	+	releaseWriteLock(lock);
619	+	awaitTermination(t1);
620	+	awaitTermination(t2);
621	+	}
622
623		/**
624		* Read tryLock succeeds if readlocked but not writelocked
625		*/
626	<	public void testTryLockWhenReadLocked() {
627	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
628	<	lock.readLock().lock();
629	<	Thread t = new Thread(new Runnable() {
630	<	public void run() {
631	<	threadAssertTrue(lock.readLock().tryLock());
632	<	lock.readLock().unlock();
633	<	}
690	<	});
691	<	try {
692	<	t.start();
693	<	t.join();
694	<	lock.readLock().unlock();
695	<	} catch(Exception e){
696	<	unexpectedException();
697	<	}
698	<	}
626	>	public void testTryLockWhenReadLocked() throws InterruptedException {
627	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
628	>	lock.readLock().lock();
629	>	Thread t = newStartedThread(new CheckedRunnable() {
630	>	public void realRun() {
631	>	assertTrue(lock.readLock().tryLock());
632	>	lock.readLock().unlock();
633	>	}});
634
635	<
635	>	awaitTermination(t);
636	>	lock.readLock().unlock();
637	>	}
638
639		/**
640		* write tryLock fails when readlocked
641		*/
642	<	public void testWriteTryLockWhenReadLocked() {
643	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	<	lock.readLock().lock();
645	<	Thread t = new Thread(new Runnable() {
646	<	public void run() {
647	<	threadAssertFalse(lock.writeLock().tryLock());
648	<	}
712	<	});
713	<	try {
714	<	t.start();
715	<	t.join();
716	<	lock.readLock().unlock();
717	<	} catch(Exception e){
718	<	unexpectedException();
719	<	}
720	<	}
642	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	>	lock.readLock().lock();
645	>	Thread t = newStartedThread(new CheckedRunnable() {
646	>	public void realRun() {
647	>	assertFalse(lock.writeLock().tryLock());
648	>	}});
649
650	+	awaitTermination(t);
651	+	lock.readLock().unlock();
652	+	}
653
654		/**
655		* Fair Read tryLock succeeds if readlocked but not writelocked
656		*/
657	<	public void testTryLockWhenReadLockedFair() {
658	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
659	<	lock.readLock().lock();
660	<	Thread t = new Thread(new Runnable() {
661	<	public void run() {
662	<	threadAssertTrue(lock.readLock().tryLock());
663	<	lock.readLock().unlock();
664	<	}
734	<	});
735	<	try {
736	<	t.start();
737	<	t.join();
738	<	lock.readLock().unlock();
739	<	} catch(Exception e){
740	<	unexpectedException();
741	<	}
742	<	}
657	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
659	>	lock.readLock().lock();
660	>	Thread t = newStartedThread(new CheckedRunnable() {
661	>	public void realRun() {
662	>	assertTrue(lock.readLock().tryLock());
663	>	lock.readLock().unlock();
664	>	}});
665
666	<
666	>	awaitTermination(t);
667	>	lock.readLock().unlock();
668	>	}
669
670		/**
671		* Fair write tryLock fails when readlocked
672		*/
673	<	public void testWriteTryLockWhenReadLockedFair() {
674	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
675	<	lock.readLock().lock();
676	<	Thread t = new Thread(new Runnable() {
677	<	public void run() {
678	<	threadAssertFalse(lock.writeLock().tryLock());
679	<	}
756	<	});
757	<	try {
758	<	t.start();
759	<	t.join();
760	<	lock.readLock().unlock();
761	<	} catch(Exception e){
762	<	unexpectedException();
763	<	}
764	<	}
673	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
674	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
675	>	lock.readLock().lock();
676	>	Thread t = newStartedThread(new CheckedRunnable() {
677	>	public void realRun() {
678	>	assertFalse(lock.writeLock().tryLock());
679	>	}});
680
681	<
681	>	awaitTermination(t);
682	>	lock.readLock().unlock();
683	>	}
684
685		/**
686		* write timed tryLock times out if locked
687		*/
688	<	public void testWriteTryLock_Timeout() {
689	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	<	lock.writeLock().lock();
691	<	Thread t = new Thread(new Runnable() {
692	<	public void run() {
693	<	try {
694	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
695	<	} catch (Exception ex) {
696	<	threadUnexpectedException();
697	<	}
698	<	}
699	<	});
783	<	try {
784	<	t.start();
785	<	t.join();
786	<	lock.writeLock().unlock();
787	<	} catch(Exception e){
788	<	unexpectedException();
789	<	}
790	<	}
688	>	public void testWriteTryLock_Timeout() throws InterruptedException {
689	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	>	lock.writeLock().lock();
691	>	Thread t = newStartedThread(new CheckedRunnable() {
692	>	public void realRun() throws InterruptedException {
693	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
694	>	}});
695	>
696	>	awaitTermination(t);
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));
802	<	} catch (Exception ex) {
803	<	threadUnexpectedException();
804	<	}
805	<	}
806	<	});
807	<	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 = newStartedThread(new CheckedRunnable() {
708	>	public void realRun() throws InterruptedException {
709	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
710	>	}});
711
712	+	awaitTermination(t);
713	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
714	+	lock.writeLock().unlock();
715	+	}
716
717		/**
718		* write lockInterruptibly succeeds if lock free else is interruptible
719		*/
720	<	public void testWriteLockInterruptibly() {
721	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	<	try {
723	<	lock.writeLock().lockInterruptibly();
724	<	} catch(Exception e) {
725	<	unexpectedException();
726	<	}
727	<	Thread t = new Thread(new Runnable() {
728	<	public void run() {
729	<	try {
730	<	lock.writeLock().lockInterruptibly();
731	<	threadShouldThrow();
832	<	}
833	<	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	<	}
720	>	public void testWriteLockInterruptibly() throws InterruptedException {
721	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	>	lock.writeLock().lockInterruptibly();
723	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
724	>	public void realRun() throws InterruptedException {
725	>	lock.writeLock().lockInterruptibly();
726	>	}});
727	>
728	>	waitForQueuedThread(lock, t);
729	>	t.interrupt();
730	>	awaitTermination(t);
731	>	releaseWriteLock(lock);
732		}
733
734		/**
735	<	*  read lockInterruptibly succeeds if lock free else is interruptible
735	>	* read lockInterruptibly succeeds if lock free else is interruptible
736		*/
737	<	public void testReadLockInterruptibly() {
738	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739	<	try {
740	<	lock.writeLock().lockInterruptibly();
741	<	} catch(Exception e) {
742	<	unexpectedException();
743	<	}
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	try {
747	<	lock.readLock().lockInterruptibly();
748	<	threadShouldThrow();
863	<	}
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	<	}
737	>	public void testReadLockInterruptibly() throws InterruptedException {
738	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739	>	lock.writeLock().lockInterruptibly();
740	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.readLock().lockInterruptibly();
743	>	}});
744	>
745	>	waitForQueuedThread(lock, t);
746	>	t.interrupt();
747	>	awaitTermination(t);
748	>	releaseWriteLock(lock);
749		}
750
751		/**
752		* Calling await without holding lock throws IllegalMonitorStateException
753		*/
754	<	public void testAwait_IllegalMonitor() {
755	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	public void testAwait_IllegalMonitor() throws InterruptedException {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
756		final Condition c = lock.writeLock().newCondition();
757		try {
758		c.await();
759		shouldThrow();
760	<	}
761	<	catch (IllegalMonitorStateException success) {
762	<	}
891	<	catch (Exception ex) {
760	>	} catch (IllegalMonitorStateException success) {}
761	>	try {
762	>	c.await(LONG_DELAY_MS, MILLISECONDS);
763		shouldThrow();
764	<	}
764	>	} catch (IllegalMonitorStateException success) {}
765	>	try {
766	>	c.awaitNanos(100);
767	>	shouldThrow();
768	>	} catch (IllegalMonitorStateException success) {}
769	>	try {
770	>	c.awaitUninterruptibly();
771	>	shouldThrow();
772	>	} catch (IllegalMonitorStateException success) {}
773		}
774
775		/**
776		* Calling signal without holding lock throws IllegalMonitorStateException
777		*/
778		public void testSignal_IllegalMonitor() {
779	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
779	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
780		final Condition c = lock.writeLock().newCondition();
781		try {
782		c.signal();
783		shouldThrow();
784	<	}
906	<	catch (IllegalMonitorStateException success) {
907	<	}
908	<	catch (Exception ex) {
909	<	unexpectedException();
910	<	}
784	>	} catch (IllegalMonitorStateException success) {}
785		}
786
787		/**
788	<	* awaitNanos without a signal times out
788	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
789		*/
790	<	public void testAwaitNanos_Timeout() {
791	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	>	public void testSignalAll_IllegalMonitor() {
791	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
792		final Condition c = lock.writeLock().newCondition();
793		try {
794	<	lock.writeLock().lock();
795	<	long t = c.awaitNanos(100);
796	<	assertTrue(t <= 0);
923	<	lock.writeLock().unlock();
924	<	}
925	<	catch (Exception ex) {
926	<	unexpectedException();
927	<	}
794	>	c.signalAll();
795	>	shouldThrow();
796	>	} catch (IllegalMonitorStateException success) {}
797		}
798
799	+	/**
800	+	* awaitNanos without a signal times out
801	+	*/
802	+	public void testAwaitNanos_Timeout() throws InterruptedException {
803	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
804	+	final Condition c = lock.writeLock().newCondition();
805	+	lock.writeLock().lock();
806	+	long startTime = System.nanoTime();
807	+	long timeoutMillis = 10;
808	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
809	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
810	+	assertTrue(nanosRemaining <= 0);
811	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
812	+	lock.writeLock().unlock();
813	+	}
814
815		/**
816	<	*  timed await without a signal times out
816	>	* timed await without a signal times out
817		*/
818	<	public void testAwait_Timeout() {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	>	public void testAwait_Timeout() throws InterruptedException {
819	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820		final Condition c = lock.writeLock().newCondition();
821	<	try {
822	<	lock.writeLock().lock();
823	<	lock.writeLock().unlock();
824	<	}
825	<	catch (Exception ex) {
826	<	unexpectedException();
943	<	}
821	>	lock.writeLock().lock();
822	>	long startTime = System.nanoTime();
823	>	long timeoutMillis = 10;
824	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
825	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
826	>	lock.writeLock().unlock();
827		}
828
829		/**
830		* awaitUntil without a signal times out
831		*/
832	<	public void testAwaitUntil_Timeout() {
833	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
832	>	public void testAwaitUntil_Timeout() throws InterruptedException {
833	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
834		final Condition c = lock.writeLock().newCondition();
835	<	try {
836	<	lock.writeLock().lock();
837	<	java.util.Date d = new java.util.Date();
838	<	lock.writeLock().unlock();
956	<	}
957	<	catch (Exception ex) {
958	<	unexpectedException();
959	<	}
835	>	lock.writeLock().lock();
836	>	java.util.Date d = new java.util.Date();
837	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
838	>	lock.writeLock().unlock();
839		}
840
841		/**
842		* await returns when signalled
843		*/
844	<	public void testAwait() {
845	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	>	public void testAwait() throws InterruptedException {
845	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846		final Condition c = lock.writeLock().newCondition();
847	<	Thread t = new Thread(new Runnable() {
848	<	public void run() {
849	<	try {
850	<	lock.writeLock().lock();
851	<	c.await();
852	<	lock.writeLock().unlock();
853	<	}
854	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
980	<
981	<	try {
982	<	t.start();
983	<	Thread.sleep(SHORT_DELAY_MS);
984	<	lock.writeLock().lock();
985	<	c.signal();
986	<	lock.writeLock().unlock();
987	<	t.join(SHORT_DELAY_MS);
988	<	assertFalse(t.isAlive());
989	<	}
990	<	catch (Exception ex) {
991	<	unexpectedException();
992	<	}
993	<	}
847	>	final CountDownLatch locked = new CountDownLatch(1);
848	>	Thread t = newStartedThread(new CheckedRunnable() {
849	>	public void realRun() throws InterruptedException {
850	>	lock.writeLock().lock();
851	>	locked.countDown();
852	>	c.await();
853	>	lock.writeLock().unlock();
854	>	}});
855
856	<	/** A helper class for uninterruptible wait tests */
857	<	class UninterruptableThread extends Thread {
858	<	private Lock lock;
859	<	private Condition c;
860	<
861	<	public volatile boolean canAwake = false;
1001	<	public volatile boolean interrupted = false;
1002	<	public volatile boolean lockStarted = false;
1003	<
1004	<	public UninterruptableThread(Lock lock, Condition c) {
1005	<	this.lock = lock;
1006	<	this.c = c;
1007	<	}
1008	<
1009	<	public synchronized void run() {
1010	<	lock.lock();
1011	<	lockStarted = true;
1012	<
1013	<	while (!canAwake) {
1014	<	c.awaitUninterruptibly();
1015	<	}
1016	<
1017	<	interrupted = isInterrupted();
1018	<	lock.unlock();
1019	<	}
856	>	locked.await();
857	>	lock.writeLock().lock();
858	>	c.signal();
859	>	assertTrue(t.isAlive());
860	>	lock.writeLock().unlock();
861	>	awaitTermination(t);
862		}
863
864		/**
865		* awaitUninterruptibly doesn't abort on interrupt
866		*/
867	<	public void testAwaitUninterruptibly() {
867	>	public void testAwaitUninterruptibly() throws InterruptedException {
868		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869		final Condition c = lock.writeLock().newCondition();
870	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
871	<
872	<	try {
873	<	thread.start();
874	<
875	<	while (!thread.lockStarted) {
876	<	Thread.sleep(100);
877	<	}
1036	<
1037	<	lock.writeLock().lock();
1038	<	try {
1039	<	thread.interrupt();
1040	<	thread.canAwake = true;
1041	<	c.signal();
1042	<	} finally {
870	>	final CountDownLatch locked = new CountDownLatch(1);
871	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
872	>	Thread t = newStartedThread(new CheckedRunnable() {
873	>	public void realRun() {
874	>	lock.writeLock().lock();
875	>	locked.countDown();
876	>	c.awaitUninterruptibly();
877	>	assertTrue(Thread.interrupted());
878		lock.writeLock().unlock();
879	<	}
879	>	}});
880
881	<	thread.join();
882	<	assertTrue(thread.interrupted);
883	<	assertFalse(thread.isAlive());
884	<	} catch (Exception ex) {
885	<	unexpectedException();
886	<	}
881	>	locked.await();
882	>	lock.writeLock().lock();
883	>	lock.writeLock().unlock();
884	>	t.interrupt();
885	>	t.join(10);
886	>	assertTrue(t.isAlive());
887	>	lock.writeLock().lock();
888	>	c.signal();
889	>	lock.writeLock().unlock();
890	>	awaitTermination(t);
891		}
892
893		/**
894		* await is interruptible
895		*/
896	<	public void testAwait_Interrupt() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	public void testAwait_Interrupt() throws InterruptedException {
897	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
898		final Condition c = lock.writeLock().newCondition();
899	<	Thread t = new Thread(new Runnable() {
900	<	public void run() {
901	<	try {
902	<	lock.writeLock().lock();
903	<	c.await();
904	<	lock.writeLock().unlock();
905	<	threadShouldThrow();
906	<	}
907	<	catch(InterruptedException success) {
908	<	}
909	<	}
910	<	});
911	<
912	<	try {
913	<	t.start();
914	<	Thread.sleep(SHORT_DELAY_MS);
915	<	t.interrupt();
916	<	t.join(SHORT_DELAY_MS);
917	<	assertFalse(t.isAlive());
918	<	}
919	<	catch (Exception ex) {
920	<	unexpectedException();
921	<	}
899	>	final CountDownLatch locked = new CountDownLatch(1);
900	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
901	>	public void realRun() throws InterruptedException {
902	>	lock.writeLock().lock();
903	>	assertTrue(lock.isWriteLocked());
904	>	assertTrue(lock.isWriteLockedByCurrentThread());
905	>	assertHasNoWaiters(lock, c);
906	>	locked.countDown();
907	>	try {
908	>	c.await();
909	>	} finally {
910	>	assertTrue(lock.isWriteLocked());
911	>	assertTrue(lock.isWriteLockedByCurrentThread());
912	>	assertHasNoWaiters(lock, c);
913	>	lock.writeLock().unlock();
914	>	assertFalse(Thread.interrupted());
915	>	}
916	>	}});
917	>
918	>	locked.await();
919	>	assertHasWaiters(lock, c, t);
920	>	t.interrupt();
921	>	awaitTermination(t);
922	>	assertFalse(lock.isWriteLocked());
923		}
924
925		/**
926		* awaitNanos is interruptible
927		*/
928	<	public void testAwaitNanos_Interrupt() {
929	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
929	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new Runnable() {
932	<	public void run() {
933	<	try {
934	<	lock.writeLock().lock();
935	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
936	<	lock.writeLock().unlock();
937	<	threadShouldThrow();
938	<	}
939	<	catch(InterruptedException success) {
940	<	}
941	<	}
942	<	});
943	<
944	<	try {
945	<	t.start();
946	<	Thread.sleep(SHORT_DELAY_MS);
947	<	t.interrupt();
948	<	t.join(SHORT_DELAY_MS);
949	<	assertFalse(t.isAlive());
950	<	}
951	<	catch (Exception ex) {
952	<	unexpectedException();
953	<	}
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	lock.writeLock().lock();
935	>	assertTrue(lock.isWriteLocked());
936	>	assertTrue(lock.isWriteLockedByCurrentThread());
937	>	assertHasNoWaiters(lock, c);
938	>	locked.countDown();
939	>	try {
940	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
941	>	} finally {
942	>	assertTrue(lock.isWriteLocked());
943	>	assertTrue(lock.isWriteLockedByCurrentThread());
944	>	assertHasNoWaiters(lock, c);
945	>	lock.writeLock().unlock();
946	>	assertFalse(Thread.interrupted());
947	>	}
948	>	}});
949	>
950	>	locked.await();
951	>	assertHasWaiters(lock, c, t);
952	>	t.interrupt();
953	>	awaitTermination(t);
954	>	assertFalse(lock.isWriteLocked());
955		}
956
957		/**
958		* awaitUntil is interruptible
959		*/
960	<	public void testAwaitUntil_Interrupt() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
961	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
962		final Condition c = lock.writeLock().newCondition();
963	<	Thread t = new Thread(new Runnable() {
964	<	public void run() {
965	<	try {
966	<	lock.writeLock().lock();
967	<	java.util.Date d = new java.util.Date();
968	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
969	<	lock.writeLock().unlock();
970	<	threadShouldThrow();
971	<	}
972	<	catch(InterruptedException success) {
973	<	}
974	<	}
975	<	});
976	<
977	<	try {
978	<	t.start();
979	<	Thread.sleep(SHORT_DELAY_MS);
980	<	t.interrupt();
981	<	t.join(SHORT_DELAY_MS);
982	<	assertFalse(t.isAlive());
983	<	}
984	<	catch (Exception ex) {
985	<	unexpectedException();
986	<	}
963	>	final CountDownLatch locked = new CountDownLatch(1);
964	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
965	>	public void realRun() throws InterruptedException {
966	>	lock.writeLock().lock();
967	>	assertTrue(lock.isWriteLocked());
968	>	assertTrue(lock.isWriteLockedByCurrentThread());
969	>	assertHasNoWaiters(lock, c);
970	>	locked.countDown();
971	>	java.util.Date d = new java.util.Date();
972	>	try {
973	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
974	>	} finally {
975	>	assertTrue(lock.isWriteLocked());
976	>	assertTrue(lock.isWriteLockedByCurrentThread());
977	>	assertHasNoWaiters(lock, c);
978	>	lock.writeLock().unlock();
979	>	assertFalse(Thread.interrupted());
980	>	}
981	>	}});
982	>
983	>	locked.await();
984	>	assertHasWaiters(lock, c, t);
985	>	t.interrupt();
986	>	awaitTermination(t);
987	>	assertFalse(lock.isWriteLocked());
988		}
989
990		/**
991		* signalAll wakes up all threads
992		*/
993	<	public void testSignalAll() {
994	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
993	>	public void testSignalAll() throws InterruptedException {
994	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
995		final Condition c = lock.writeLock().newCondition();
996	<	Thread t1 = new Thread(new Runnable() {
997	<	public void run() {
998	<	try {
999	<	lock.writeLock().lock();
1000	<	c.await();
1001	<	lock.writeLock().unlock();
1002	<	}
1003	<	catch(InterruptedException e) {
1004	<	threadUnexpectedException();
1005	<	}
1006	<	}
1007	<	});
1008	<
1009	<	Thread t2 = new Thread(new Runnable() {
1010	<	public void run() {
1011	<	try {
1012	<	lock.writeLock().lock();
1013	<	c.await();
1014	<	lock.writeLock().unlock();
1015	<	}
1016	<	catch(InterruptedException e) {
1017	<	threadUnexpectedException();
1018	<	}
1019	<	}
1020	<	});
996	>	final CountDownLatch locked = new CountDownLatch(2);
997	>	final Lock writeLock = lock.writeLock();
998	>	Thread t1 = newStartedThread(new CheckedRunnable() {
999	>	public void realRun() throws InterruptedException {
1000	>	writeLock.lock();
1001	>	locked.countDown();
1002	>	c.await();
1003	>	writeLock.unlock();
1004	>	}});
1005	>
1006	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1007	>	public void realRun() throws InterruptedException {
1008	>	writeLock.lock();
1009	>	locked.countDown();
1010	>	c.await();
1011	>	writeLock.unlock();
1012	>	}});
1013	>
1014	>	locked.await();
1015	>	writeLock.lock();
1016	>	assertHasWaiters(lock, c, t1, t2);
1017	>	c.signalAll();
1018	>	assertHasNoWaiters(lock, c);
1019	>	writeLock.unlock();
1020	>	awaitTermination(t1);
1021	>	awaitTermination(t2);
1022	>	}
1023
1024	<	try {
1025	<	t1.start();
1026	<	t2.start();
1027	<	Thread.sleep(SHORT_DELAY_MS);
1028	<	lock.writeLock().lock();
1029	<	c.signalAll();
1030	<	lock.writeLock().unlock();
1031	<	t1.join(SHORT_DELAY_MS);
1032	<	t2.join(SHORT_DELAY_MS);
1033	<	assertFalse(t1.isAlive());
1034	<	assertFalse(t2.isAlive());
1035	<	}
1036	<	catch (Exception ex) {
1037	<	unexpectedException();
1038	<	}
1024	>	/**
1025	>	* signal wakes up waiting threads in FIFO order.
1026	>	*/
1027	>	public void testSignalWakesFifo() throws InterruptedException {
1028	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1029	>	final Condition c = lock.writeLock().newCondition();
1030	>	final CountDownLatch locked1 = new CountDownLatch(1);
1031	>	final CountDownLatch locked2 = new CountDownLatch(1);
1032	>	final Lock writeLock = lock.writeLock();
1033	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1034	>	public void realRun() throws InterruptedException {
1035	>	writeLock.lock();
1036	>	locked1.countDown();
1037	>	c.await();
1038	>	writeLock.unlock();
1039	>	}});
1040	>
1041	>	locked1.await();
1042	>
1043	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1044	>	public void realRun() throws InterruptedException {
1045	>	writeLock.lock();
1046	>	locked2.countDown();
1047	>	c.await();
1048	>	writeLock.unlock();
1049	>	}});
1050	>
1051	>	locked2.await();
1052	>
1053	>	writeLock.lock();
1054	>	assertHasWaiters(lock, c, t1, t2);
1055	>	assertFalse(lock.hasQueuedThreads());
1056	>	c.signal();
1057	>	assertHasWaiters(lock, c, t2);
1058	>	assertTrue(lock.hasQueuedThread(t1));
1059	>	assertFalse(lock.hasQueuedThread(t2));
1060	>	c.signal();
1061	>	assertHasNoWaiters(lock, c);
1062	>	assertTrue(lock.hasQueuedThread(t1));
1063	>	assertTrue(lock.hasQueuedThread(t2));
1064	>	writeLock.unlock();
1065	>	awaitTermination(t1);
1066	>	awaitTermination(t2);
1067		}
1068
1069		/**
1070		* A serialized lock deserializes as unlocked
1071		*/
1072	<	public void testSerialization() {
1072	>	public void testSerialization() throws Exception {
1073		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1074		l.readLock().lock();
1075		l.readLock().unlock();
1076
1077	<	try {
1078	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1079	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1080	<	out.writeObject(l);
1081	<	out.close();
1082	<
1083	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1084	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1085	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1086	<	r.readLock().lock();
1215	<	r.readLock().unlock();
1216	<	} catch(Exception e){
1217	<	e.printStackTrace();
1218	<	unexpectedException();
1219	<	}
1077	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1078	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1079	>	out.writeObject(l);
1080	>	out.close();
1081	>
1082	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1083	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1084	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1085	>	r.readLock().lock();
1086	>	r.readLock().unlock();
1087		}
1088
1089		/**
1090		* hasQueuedThreads reports whether there are waiting threads
1091		*/
1092	<	public void testhasQueuedThreads() {
1093	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1092	>	public void testhasQueuedThreads() throws InterruptedException {
1093	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1094		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1095		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1096	<	try {
1097	<	assertFalse(lock.hasQueuedThreads());
1098	<	lock.writeLock().lock();
1099	<	t1.start();
1100	<	Thread.sleep(SHORT_DELAY_MS);
1101	<	assertTrue(lock.hasQueuedThreads());
1102	<	t2.start();
1103	<	Thread.sleep(SHORT_DELAY_MS);
1104	<	assertTrue(lock.hasQueuedThreads());
1105	<	t1.interrupt();
1106	<	Thread.sleep(SHORT_DELAY_MS);
1107	<	assertTrue(lock.hasQueuedThreads());
1108	<	lock.writeLock().unlock();
1109	<	Thread.sleep(SHORT_DELAY_MS);
1110	<	assertFalse(lock.hasQueuedThreads());
1111	<	t1.join();
1245	<	t2.join();
1246	<	} catch(Exception e){
1247	<	unexpectedException();
1248	<	}
1249	<	}
1096	>	assertFalse(lock.hasQueuedThreads());
1097	>	lock.writeLock().lock();
1098	>	assertFalse(lock.hasQueuedThreads());
1099	>	long startTime = System.nanoTime();
1100	>	t1.start();
1101	>	waitForQueuedThread(lock, t1);
1102	>	t2.start();
1103	>	waitForQueuedThread(lock, t2);
1104	>	assertTrue(lock.hasQueuedThreads());
1105	>	t1.interrupt();
1106	>	awaitTermination(t1);
1107	>	assertTrue(lock.hasQueuedThreads());
1108	>	lock.writeLock().unlock();
1109	>	awaitTermination(t2);
1110	>	assertFalse(lock.hasQueuedThreads());
1111	>	}
1112
1113		/**
1114		* hasQueuedThread(null) throws NPE
1115		*/
1116	<	public void testHasQueuedThreadNPE() {
1117	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1116	>	public void testHasQueuedThreadNPE() {
1117	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1118		try {
1119		sync.hasQueuedThread(null);
1120		shouldThrow();
1121	<	} catch (NullPointerException success) {
1260	<	}
1121	>	} catch (NullPointerException success) {}
1122		}
1123
1124		/**
1125		* hasQueuedThread reports whether a thread is queued.
1126		*/
1127	<	public void testHasQueuedThread() {
1128	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1129	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1130	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1131	<	try {
1132	<	assertFalse(sync.hasQueuedThread(t1));
1133	<	assertFalse(sync.hasQueuedThread(t2));
1134	<	sync.writeLock().lock();
1135	<	t1.start();
1136	<	Thread.sleep(SHORT_DELAY_MS);
1137	<	assertTrue(sync.hasQueuedThread(t1));
1138	<	t2.start();
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	assertTrue(sync.hasQueuedThread(t1));
1141	<	assertTrue(sync.hasQueuedThread(t2));
1142	<	t1.interrupt();
1143	<	Thread.sleep(SHORT_DELAY_MS);
1144	<	assertFalse(sync.hasQueuedThread(t1));
1145	<	assertTrue(sync.hasQueuedThread(t2));
1146	<	sync.writeLock().unlock();
1147	<	Thread.sleep(SHORT_DELAY_MS);
1148	<	assertFalse(sync.hasQueuedThread(t1));
1149	<	Thread.sleep(SHORT_DELAY_MS);
1150	<	assertFalse(sync.hasQueuedThread(t2));
1151	<	t1.join();
1291	<	t2.join();
1292	<	} catch(Exception e){
1293	<	unexpectedException();
1294	<	}
1295	<	}
1296	<
1127	>	public void testHasQueuedThread() throws InterruptedException {
1128	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1129	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1130	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1131	>	assertFalse(lock.hasQueuedThread(t1));
1132	>	assertFalse(lock.hasQueuedThread(t2));
1133	>	lock.writeLock().lock();
1134	>	long startTime = System.nanoTime();
1135	>	t1.start();
1136	>	waitForQueuedThread(lock, t1);
1137	>	assertTrue(lock.hasQueuedThread(t1));
1138	>	assertFalse(lock.hasQueuedThread(t2));
1139	>	t2.start();
1140	>	waitForQueuedThread(lock, t2);
1141	>	assertTrue(lock.hasQueuedThread(t1));
1142	>	assertTrue(lock.hasQueuedThread(t2));
1143	>	t1.interrupt();
1144	>	awaitTermination(t1);
1145	>	assertFalse(lock.hasQueuedThread(t1));
1146	>	assertTrue(lock.hasQueuedThread(t2));
1147	>	lock.writeLock().unlock();
1148	>	awaitTermination(t2);
1149	>	assertFalse(lock.hasQueuedThread(t1));
1150	>	assertFalse(lock.hasQueuedThread(t2));
1151	>	}
1152
1153		/**
1154		* getQueueLength reports number of waiting threads
1155		*/
1156	<	public void testGetQueueLength() {
1157	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1156	>	public void testGetQueueLength() throws InterruptedException {
1157	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1158		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1159		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1160	<	try {
1161	<	assertEquals(0, lock.getQueueLength());
1162	<	lock.writeLock().lock();
1163	<	t1.start();
1164	<	Thread.sleep(SHORT_DELAY_MS);
1165	<	assertEquals(1, lock.getQueueLength());
1166	<	t2.start();
1167	<	Thread.sleep(SHORT_DELAY_MS);
1168	<	assertEquals(2, lock.getQueueLength());
1169	<	t1.interrupt();
1170	<	Thread.sleep(SHORT_DELAY_MS);
1171	<	assertEquals(1, lock.getQueueLength());
1172	<	lock.writeLock().unlock();
1173	<	Thread.sleep(SHORT_DELAY_MS);
1174	<	assertEquals(0, lock.getQueueLength());
1175	<	t1.join();
1321	<	t2.join();
1322	<	} catch(Exception e){
1323	<	unexpectedException();
1324	<	}
1325	<	}
1160	>	assertEquals(0, lock.getQueueLength());
1161	>	lock.writeLock().lock();
1162	>	long startTime = System.nanoTime();
1163	>	t1.start();
1164	>	waitForQueuedThread(lock, t1);
1165	>	assertEquals(1, lock.getQueueLength());
1166	>	t2.start();
1167	>	waitForQueuedThread(lock, t2);
1168	>	assertEquals(2, lock.getQueueLength());
1169	>	t1.interrupt();
1170	>	awaitTermination(t1);
1171	>	assertEquals(1, lock.getQueueLength());
1172	>	lock.writeLock().unlock();
1173	>	awaitTermination(t2);
1174	>	assertEquals(0, lock.getQueueLength());
1175	>	}
1176
1177		/**
1178		* getQueuedThreads includes waiting threads
1179		*/
1180	<	public void testGetQueuedThreads() {
1181	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1180	>	public void testGetQueuedThreads() throws InterruptedException {
1181	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1182		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1183		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1184	<	try {
1185	<	assertTrue(lock.getQueuedThreads().isEmpty());
1186	<	lock.writeLock().lock();
1187	<	assertTrue(lock.getQueuedThreads().isEmpty());
1188	<	t1.start();
1189	<	Thread.sleep(SHORT_DELAY_MS);
1190	<	assertTrue(lock.getQueuedThreads().contains(t1));
1191	<	t2.start();
1192	<	Thread.sleep(SHORT_DELAY_MS);
1193	<	assertTrue(lock.getQueuedThreads().contains(t1));
1194	<	assertTrue(lock.getQueuedThreads().contains(t2));
1195	<	t1.interrupt();
1196	<	Thread.sleep(SHORT_DELAY_MS);
1197	<	assertFalse(lock.getQueuedThreads().contains(t1));
1198	<	assertTrue(lock.getQueuedThreads().contains(t2));
1199	<	lock.writeLock().unlock();
1200	<	Thread.sleep(SHORT_DELAY_MS);
1201	<	assertTrue(lock.getQueuedThreads().isEmpty());
1202	<	t1.join();
1203	<	t2.join();
1204	<	} catch(Exception e){
1205	<	unexpectedException();
1356	<	}
1357	<	}
1184	>	assertTrue(lock.getQueuedThreads().isEmpty());
1185	>	lock.writeLock().lock();
1186	>	long startTime = System.nanoTime();
1187	>	assertTrue(lock.getQueuedThreads().isEmpty());
1188	>	t1.start();
1189	>	waitForQueuedThread(lock, t1);
1190	>	assertEquals(1, lock.getQueuedThreads().size());
1191	>	assertTrue(lock.getQueuedThreads().contains(t1));
1192	>	t2.start();
1193	>	waitForQueuedThread(lock, t2);
1194	>	assertEquals(2, lock.getQueuedThreads().size());
1195	>	assertTrue(lock.getQueuedThreads().contains(t1));
1196	>	assertTrue(lock.getQueuedThreads().contains(t2));
1197	>	t1.interrupt();
1198	>	awaitTermination(t1);
1199	>	assertFalse(lock.getQueuedThreads().contains(t1));
1200	>	assertTrue(lock.getQueuedThreads().contains(t2));
1201	>	assertEquals(1, lock.getQueuedThreads().size());
1202	>	lock.writeLock().unlock();
1203	>	awaitTermination(t2);
1204	>	assertTrue(lock.getQueuedThreads().isEmpty());
1205	>	}
1206
1207		/**
1208		* hasWaiters throws NPE if null
1209		*/
1210		public void testHasWaitersNPE() {
1211	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1211	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1212		try {
1213		lock.hasWaiters(null);
1214		shouldThrow();
1215	<	} catch (NullPointerException success) {
1368	<	} catch (Exception ex) {
1369	<	unexpectedException();
1370	<	}
1215	>	} catch (NullPointerException success) {}
1216		}
1217
1218		/**
1219		* getWaitQueueLength throws NPE if null
1220		*/
1221		public void testGetWaitQueueLengthNPE() {
1222	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223		try {
1224		lock.getWaitQueueLength(null);
1225		shouldThrow();
1226	<	} catch (NullPointerException success) {
1382	<	} catch (Exception ex) {
1383	<	unexpectedException();
1384	<	}
1226	>	} catch (NullPointerException success) {}
1227		}
1228
1387	–
1229		/**
1230		* getWaitingThreads throws NPE if null
1231		*/
1232		public void testGetWaitingThreadsNPE() {
1233	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1233	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1234		try {
1235		lock.getWaitingThreads(null);
1236		shouldThrow();
1237	<	} catch (NullPointerException success) {
1397	<	} catch (Exception ex) {
1398	<	unexpectedException();
1399	<	}
1237	>	} catch (NullPointerException success) {}
1238		}
1239
1240		/**
1241		* hasWaiters throws IAE if not owned
1242		*/
1243		public void testHasWaitersIAE() {
1244	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1245	<	final Condition c = (lock.writeLock().newCondition());
1246	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1244	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1245	>	final Condition c = lock.writeLock().newCondition();
1246	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1247		try {
1248		lock2.hasWaiters(c);
1249		shouldThrow();
1250	<	} catch (IllegalArgumentException success) {
1413	<	} catch (Exception ex) {
1414	<	unexpectedException();
1415	<	}
1250	>	} catch (IllegalArgumentException success) {}
1251		}
1252
1253		/**
1254		* hasWaiters throws IMSE if not locked
1255		*/
1256		public void testHasWaitersIMSE() {
1257	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1258	<	final Condition c = (lock.writeLock().newCondition());
1257	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1258	>	final Condition c = lock.writeLock().newCondition();
1259		try {
1260		lock.hasWaiters(c);
1261		shouldThrow();
1262	<	} catch (IllegalMonitorStateException success) {
1428	<	} catch (Exception ex) {
1429	<	unexpectedException();
1430	<	}
1262	>	} catch (IllegalMonitorStateException success) {}
1263		}
1264
1433	–
1265		/**
1266		* getWaitQueueLength throws IAE if not owned
1267		*/
1268		public void testGetWaitQueueLengthIAE() {
1269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1270	<	final Condition c = (lock.writeLock().newCondition());
1271	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1270	>	final Condition c = lock.writeLock().newCondition();
1271	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1272		try {
1273		lock2.getWaitQueueLength(c);
1274		shouldThrow();
1275	<	} catch (IllegalArgumentException success) {
1445	<	} catch (Exception ex) {
1446	<	unexpectedException();
1447	<	}
1275	>	} catch (IllegalArgumentException success) {}
1276		}
1277
1278		/**
1279		* getWaitQueueLength throws IMSE if not locked
1280		*/
1281		public void testGetWaitQueueLengthIMSE() {
1282	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1283	<	final Condition c = (lock.writeLock().newCondition());
1282	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1283	>	final Condition c = lock.writeLock().newCondition();
1284		try {
1285		lock.getWaitQueueLength(c);
1286		shouldThrow();
1287	<	} catch (IllegalMonitorStateException success) {
1460	<	} catch (Exception ex) {
1461	<	unexpectedException();
1462	<	}
1287	>	} catch (IllegalMonitorStateException success) {}
1288		}
1289
1465	–
1290		/**
1291		* getWaitingThreads throws IAE if not owned
1292		*/
1293		public void testGetWaitingThreadsIAE() {
1294	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1295	<	final Condition c = (lock.writeLock().newCondition());
1296	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1294	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1295	>	final Condition c = lock.writeLock().newCondition();
1296	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1297		try {
1298		lock2.getWaitingThreads(c);
1299		shouldThrow();
1300	<	} catch (IllegalArgumentException success) {
1477	<	} catch (Exception ex) {
1478	<	unexpectedException();
1479	<	}
1300	>	} catch (IllegalArgumentException success) {}
1301		}
1302
1303		/**
1304		* getWaitingThreads throws IMSE if not locked
1305		*/
1306		public void testGetWaitingThreadsIMSE() {
1307	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1308	<	final Condition c = (lock.writeLock().newCondition());
1307	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1308	>	final Condition c = lock.writeLock().newCondition();
1309		try {
1310		lock.getWaitingThreads(c);
1311		shouldThrow();
1312	<	} catch (IllegalMonitorStateException success) {
1492	<	} catch (Exception ex) {
1493	<	unexpectedException();
1494	<	}
1312	>	} catch (IllegalMonitorStateException success) {}
1313		}
1314
1497	–
1315		/**
1316		* hasWaiters returns true when a thread is waiting, else false
1317		*/
1318	<	public void testHasWaiters() {
1319	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1320	<	final Condition c = (lock.writeLock().newCondition());
1321	<	Thread t = new Thread(new Runnable() {
1322	<	public void run() {
1323	<	try {
1324	<	lock.writeLock().lock();
1325	<	threadAssertFalse(lock.hasWaiters(c));
1326	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1327	<	c.await();
1328	<	lock.writeLock().unlock();
1329	<	}
1330	<	catch(InterruptedException e) {
1514	<	threadUnexpectedException();
1515	<	}
1516	<	}
1517	<	});
1318	>	public void testHasWaiters() throws InterruptedException {
1319	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1320	>	final Condition c = lock.writeLock().newCondition();
1321	>	final CountDownLatch locked = new CountDownLatch(1);
1322	>	Thread t = newStartedThread(new CheckedRunnable() {
1323	>	public void realRun() throws InterruptedException {
1324	>	lock.writeLock().lock();
1325	>	assertFalse(lock.hasWaiters(c));
1326	>	locked.countDown();
1327	>	assertEquals(0, lock.getWaitQueueLength(c));
1328	>	c.await();
1329	>	lock.writeLock().unlock();
1330	>	}});
1331
1332	<	try {
1333	<	t.start();
1334	<	Thread.sleep(SHORT_DELAY_MS);
1335	<	lock.writeLock().lock();
1336	<	assertTrue(lock.hasWaiters(c));
1337	<	assertEquals(1, lock.getWaitQueueLength(c));
1338	<	c.signal();
1339	<	lock.writeLock().unlock();
1340	<	Thread.sleep(SHORT_DELAY_MS);
1528	<	lock.writeLock().lock();
1529	<	assertFalse(lock.hasWaiters(c));
1530	<	assertEquals(0, lock.getWaitQueueLength(c));
1531	<	lock.writeLock().unlock();
1532	<	t.join(SHORT_DELAY_MS);
1533	<	assertFalse(t.isAlive());
1534	<	}
1535	<	catch (Exception ex) {
1536	<	unexpectedException();
1537	<	}
1332	>	locked.await();
1333	>	lock.writeLock().lock();
1334	>	assertTrue(lock.hasWaiters(c));
1335	>	assertEquals(1, lock.getWaitQueueLength(c));
1336	>	c.signal();
1337	>	assertHasNoWaiters(lock, c);
1338	>	lock.writeLock().unlock();
1339	>	awaitTermination(t);
1340	>	assertHasNoWaiters(lock, c);
1341		}
1342
1343		/**
1344		* getWaitQueueLength returns number of waiting threads
1345		*/
1346	<	public void testGetWaitQueueLength() {
1347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	<	final Condition c = (lock.writeLock().newCondition());
1349	<	Thread t = new Thread(new Runnable() {
1350	<	public void run() {
1351	<	try {
1352	<	lock.writeLock().lock();
1353	<	threadAssertFalse(lock.hasWaiters(c));
1354	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1355	<	c.await();
1356	<	lock.writeLock().unlock();
1357	<	}
1555	<	catch(InterruptedException e) {
1556	<	threadUnexpectedException();
1557	<	}
1558	<	}
1559	<	});
1346	>	public void testGetWaitQueueLength() throws InterruptedException {
1347	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1348	>	final Condition c = lock.writeLock().newCondition();
1349	>	final CountDownLatch locked = new CountDownLatch(1);
1350	>	Thread t = newStartedThread(new CheckedRunnable() {
1351	>	public void realRun() throws InterruptedException {
1352	>	lock.writeLock().lock();
1353	>	assertEquals(0, lock.getWaitQueueLength(c));
1354	>	locked.countDown();
1355	>	c.await();
1356	>	lock.writeLock().unlock();
1357	>	}});
1358
1359	<	try {
1360	<	t.start();
1361	<	Thread.sleep(SHORT_DELAY_MS);
1362	<	lock.writeLock().lock();
1363	<	assertTrue(lock.hasWaiters(c));
1364	<	assertEquals(1, lock.getWaitQueueLength(c));
1365	<	c.signal();
1366	<	lock.writeLock().unlock();
1367	<	Thread.sleep(SHORT_DELAY_MS);
1570	<	lock.writeLock().lock();
1571	<	assertFalse(lock.hasWaiters(c));
1572	<	assertEquals(0, lock.getWaitQueueLength(c));
1573	<	lock.writeLock().unlock();
1574	<	t.join(SHORT_DELAY_MS);
1575	<	assertFalse(t.isAlive());
1576	<	}
1577	<	catch (Exception ex) {
1578	<	unexpectedException();
1579	<	}
1359	>	locked.await();
1360	>	lock.writeLock().lock();
1361	>	assertHasWaiters(lock, c, t);
1362	>	assertEquals(1, lock.getWaitQueueLength(c));
1363	>	c.signal();
1364	>	assertHasNoWaiters(lock, c);
1365	>	assertEquals(0, lock.getWaitQueueLength(c));
1366	>	lock.writeLock().unlock();
1367	>	awaitTermination(t);
1368		}
1369
1582	–
1370		/**
1371		* getWaitingThreads returns only and all waiting threads
1372		*/
1373	<	public void testGetWaitingThreads() {
1374	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1373	>	public void testGetWaitingThreads() throws InterruptedException {
1374	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1375		final Condition c = lock.writeLock().newCondition();
1376	<	Thread t1 = new Thread(new Runnable() {
1377	<	public void run() {
1378	<	try {
1379	<	lock.writeLock().lock();
1380	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1381	<	c.await();
1382	<	lock.writeLock().unlock();
1383	<	}
1384	<	catch(InterruptedException e) {
1385	<	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	<	});
1376	>	final CountDownLatch locked1 = new CountDownLatch(1);
1377	>	final CountDownLatch locked2 = new CountDownLatch(1);
1378	>	Thread t1 = new Thread(new CheckedRunnable() {
1379	>	public void realRun() throws InterruptedException {
1380	>	lock.writeLock().lock();
1381	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1382	>	locked1.countDown();
1383	>	c.await();
1384	>	lock.writeLock().unlock();
1385	>	}});
1386
1387	<	try {
1388	<	lock.writeLock().lock();
1389	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1390	<	lock.writeLock().unlock();
1391	<	t1.start();
1392	<	Thread.sleep(SHORT_DELAY_MS);
1393	<	t2.start();
1394	<	Thread.sleep(SHORT_DELAY_MS);
1395	<	lock.writeLock().lock();
1396	<	assertTrue(lock.hasWaiters(c));
1397	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1398	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1399	<	c.signalAll();
1400	<	lock.writeLock().unlock();
1401	<	Thread.sleep(SHORT_DELAY_MS);
1402	<	lock.writeLock().lock();
1403	<	assertFalse(lock.hasWaiters(c));
1404	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1405	<	lock.writeLock().unlock();
1406	<	t1.join(SHORT_DELAY_MS);
1407	<	t2.join(SHORT_DELAY_MS);
1408	<	assertFalse(t1.isAlive());
1409	<	assertFalse(t2.isAlive());
1410	<	}
1411	<	catch (Exception ex) {
1412	<	unexpectedException();
1413	<	}
1387	>	Thread t2 = new Thread(new CheckedRunnable() {
1388	>	public void realRun() throws InterruptedException {
1389	>	lock.writeLock().lock();
1390	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1391	>	locked2.countDown();
1392	>	c.await();
1393	>	lock.writeLock().unlock();
1394	>	}});
1395	>
1396	>	lock.writeLock().lock();
1397	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1398	>	lock.writeLock().unlock();
1399	>
1400	>	t1.start();
1401	>	locked1.await();
1402	>	t2.start();
1403	>	locked2.await();
1404	>
1405	>	lock.writeLock().lock();
1406	>	assertTrue(lock.hasWaiters(c));
1407	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1408	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1409	>	assertEquals(2, lock.getWaitingThreads(c).size());
1410	>	c.signalAll();
1411	>	assertHasNoWaiters(lock, c);
1412	>	lock.writeLock().unlock();
1413	>
1414	>	awaitTermination(t1);
1415	>	awaitTermination(t2);
1416	>
1417	>	assertHasNoWaiters(lock, c);
1418		}
1419
1420		/**

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