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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.36 by jsr166, Sat Nov 21 02:33:20 2009 UTC vs.
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13		import static java.util.concurrent.TimeUnit.MILLISECONDS;
#	Line 15 | Line 16 | 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);
#	Line 32 | Line 33 | public class ReentrantReadWriteLockTest
33		}
34		}
35
35	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
#	Line 50 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	+	public Thread getOwner() {
55	+	return super.getOwner();
56	+	}
57		public Collection<Thread> getQueuedThreads() {
58		return super.getQueuedThreads();
59		}
#	Line 59 | Line 63 | public class ReentrantReadWriteLockTest
63		}
64
65		/**
66	+	* Releases write lock, checking that it had a hold count of 1.
67	+	*/
68	+	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	+	assertWriteLockedBy(lock, Thread.currentThread());
71	+	assertEquals(1, lock.getWriteHoldCount());
72	+	writeLock.unlock();
73	+	assertNotWriteLocked(lock);
74	+	}
75	+
76	+	/**
77	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78	+	*/
79	+	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	+	long startTime = System.nanoTime();
81	+	while (!lock.hasQueuedThread(t)) {
82	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	+	throw new AssertionError("timed out");
84	+	Thread.yield();
85	+	}
86	+	assertTrue(t.isAlive());
87	+	assertTrue(lock.getOwner() != t);
88	+	}
89	+
90	+	/**
91	+	* Checks that lock is not write-locked.
92	+	*/
93	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	+	assertFalse(lock.isWriteLocked());
95	+	assertFalse(lock.isWriteLockedByCurrentThread());
96	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	+	assertNull(lock.getOwner());
98	+	assertEquals(0, lock.getWriteHoldCount());
99	+	}
100	+
101	+	/**
102	+	* Checks that lock is write-locked by the given thread.
103	+	*/
104	+	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
105	+	assertTrue(lock.isWriteLocked());
106	+	assertSame(t, lock.getOwner());
107	+	assertEquals(t == Thread.currentThread(),
108	+	lock.isWriteLockedByCurrentThread());
109	+	assertEquals(t == Thread.currentThread(),
110	+	lock.writeLock().isHeldByCurrentThread());
111	+	assertEquals(t == Thread.currentThread(),
112	+	lock.getWriteHoldCount() > 0);
113	+	assertEquals(0, lock.getReadLockCount());
114	+	}
115	+
116	+	/**
117	+	* Checks that condition c has no waiters.
118	+	*/
119	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	+	assertHasWaiters(lock, c, new Thread[] {});
121	+	}
122	+
123	+	/**
124	+	* Checks that condition c has exactly the given waiter threads.
125	+	*/
126	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
127	+	Thread... threads) {
128	+	lock.writeLock().lock();
129	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
130	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
131	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
132	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
133	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
134	+	new HashSet<Thread>(Arrays.asList(threads)));
135	+	lock.writeLock().unlock();
136	+	}
137	+
138	+	/**
139		* Constructor sets given fairness, and is in unlocked state
140		*/
141		public void testConstructor() {
142	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
143	<	assertFalse(rl.isFair());
144	<	assertFalse(rl.isWriteLocked());
145	<	assertEquals(0, rl.getReadLockCount());
146	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
147	<	assertTrue(r2.isFair());
148	<	assertFalse(r2.isWriteLocked());
149	<	assertEquals(0, r2.getReadLockCount());
150	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
151	<	assertFalse(r3.isFair());
152	<	assertFalse(r3.isWriteLocked());
153	<	assertEquals(0, r3.getReadLockCount());
142	>	PublicReentrantReadWriteLock lock;
143	>
144	>	lock = new PublicReentrantReadWriteLock();
145	>	assertFalse(lock.isFair());
146	>	assertNotWriteLocked(lock);
147	>	assertEquals(0, lock.getReadLockCount());
148	>
149	>	lock = new PublicReentrantReadWriteLock(true);
150	>	assertTrue(lock.isFair());
151	>	assertNotWriteLocked(lock);
152	>	assertEquals(0, lock.getReadLockCount());
153	>
154	>	lock = new PublicReentrantReadWriteLock(false);
155	>	assertFalse(lock.isFair());
156	>	assertNotWriteLocked(lock);
157	>	assertEquals(0, lock.getReadLockCount());
158		}
159
160		/**
161		* write-locking and read-locking an unlocked lock succeed
162		*/
163		public void testLock() {
164	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
165	<	rl.writeLock().lock();
166	<	assertTrue(rl.isWriteLocked());
167	<	assertTrue(rl.isWriteLockedByCurrentThread());
168	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
169	<	assertEquals(0, rl.getReadLockCount());
170	<	rl.writeLock().unlock();
171	<	assertFalse(rl.isWriteLocked());
172	<	assertFalse(rl.isWriteLockedByCurrentThread());
173	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
174	<	assertEquals(0, rl.getReadLockCount());
175	<	rl.readLock().lock();
176	<	assertFalse(rl.isWriteLocked());
96	<	assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLockCount());
98	<	rl.readLock().unlock();
99	<	assertFalse(rl.isWriteLocked());
100	<	assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLockCount());
164	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
165	>	assertNotWriteLocked(lock);
166	>	lock.writeLock().lock();
167	>	assertWriteLockedBy(lock, Thread.currentThread());
168	>	lock.writeLock().unlock();
169	>	assertNotWriteLocked(lock);
170	>	assertEquals(0, lock.getReadLockCount());
171	>	lock.readLock().lock();
172	>	assertNotWriteLocked(lock);
173	>	assertEquals(1, lock.getReadLockCount());
174	>	lock.readLock().unlock();
175	>	assertNotWriteLocked(lock);
176	>	assertEquals(0, lock.getReadLockCount());
177		}
178
104	–
179		/**
180		* locking an unlocked fair lock succeeds
181		*/
182		public void testFairLock() {
183	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
184	<	rl.writeLock().lock();
185	<	assertTrue(rl.isWriteLocked());
186	<	assertTrue(rl.isWriteLockedByCurrentThread());
187	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
188	<	assertEquals(0, rl.getReadLockCount());
189	<	rl.writeLock().unlock();
190	<	assertFalse(rl.isWriteLocked());
191	<	assertFalse(rl.isWriteLockedByCurrentThread());
192	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
193	<	assertEquals(0, rl.getReadLockCount());
194	<	rl.readLock().lock();
195	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(1, rl.getReadLockCount());
124	<	rl.readLock().unlock();
125	<	assertFalse(rl.isWriteLocked());
126	<	assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(0, rl.getReadLockCount());
183	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
184	>	assertNotWriteLocked(lock);
185	>	lock.writeLock().lock();
186	>	assertWriteLockedBy(lock, Thread.currentThread());
187	>	lock.writeLock().unlock();
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>	lock.readLock().lock();
191	>	assertNotWriteLocked(lock);
192	>	assertEquals(1, lock.getReadLockCount());
193	>	lock.readLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196		}
197
198		/**
#	Line 172 | Line 240 | public class ReentrantReadWriteLockTest
240		}
241		}
242
175	–
243		/**
244		* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testUnlock_IllegalMonitorStateException() {
247	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248		try {
249	<	rl.writeLock().unlock();
249	>	lock.writeLock().unlock();
250		shouldThrow();
251		} catch (IllegalMonitorStateException success) {}
252		}
253
254	+	/**
255	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
256	+	*/
257	+	public void testReadUnlock_IllegalMonitorStateException() {
258	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259	+	try {
260	+	lock.readLock().unlock();
261	+	shouldThrow();
262	+	} catch (IllegalMonitorStateException success) {}
263	+	}
264
265		/**
266		* write-lockInterruptibly is interruptible
267		*/
268		public void testWriteLockInterruptibly_Interrupted() throws Exception {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
269	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
270	>	lock.writeLock().lock();
271	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
272		public void realRun() throws InterruptedException {
273		lock.writeLock().lockInterruptibly();
196	–	lock.writeLock().unlock();
197	–	lock.writeLock().lockInterruptibly();
198	–	lock.writeLock().unlock();
274		}});
275
276	<	lock.writeLock().lock();
202	<	t.start();
203	<	Thread.sleep(SHORT_DELAY_MS);
276	>	waitForQueuedThread(lock, t);
277		t.interrupt();
278	<	Thread.sleep(SHORT_DELAY_MS);
279	<	lock.writeLock().unlock();
207	<	t.join();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280		}
281
282		/**
283		* timed write-tryLock is interruptible
284		*/
285		public void testWriteTryLock_Interrupted() throws InterruptedException {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
287		lock.writeLock().lock();
288	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
288	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
289		public void realRun() throws InterruptedException {
290	<	lock.writeLock().tryLock(1000,MILLISECONDS);
290	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
291		}});
292
293	<	t.start();
293	>	waitForQueuedThread(lock, t);
294		t.interrupt();
295	<	lock.writeLock().unlock();
296	<	t.join();
295	>	awaitTermination(t);
296	>	releaseWriteLock(lock);
297		}
298
299		/**
300		* read-lockInterruptibly is interruptible
301		*/
302		public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
303	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
304		lock.writeLock().lock();
305	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
305	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
306		public void realRun() throws InterruptedException {
307		lock.readLock().lockInterruptibly();
308		}});
309
310	<	t.start();
239	<	Thread.sleep(SHORT_DELAY_MS);
310	>	waitForQueuedThread(lock, t);
311		t.interrupt();
312	<	Thread.sleep(SHORT_DELAY_MS);
313	<	lock.writeLock().unlock();
243	<	t.join();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314		}
315
316		/**
317		* timed read-tryLock is interruptible
318		*/
319		public void testReadTryLock_Interrupted() throws InterruptedException {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
321		lock.writeLock().lock();
322	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
322	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
323		public void realRun() throws InterruptedException {
324	<	lock.readLock().tryLock(1000,MILLISECONDS);
324	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
325		}});
326
327	<	t.start();
327	>	waitForQueuedThread(lock, t);
328		t.interrupt();
329	<	t.join();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331		}
332
262	–
333		/**
334		* write-tryLock fails if locked
335		*/
336		public void testWriteTryLockWhenLocked() throws InterruptedException {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
338		lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	threadAssertFalse(lock.writeLock().tryLock());
342	<	}
273	<	});
339	>	Thread t = newStartedThread(new CheckedRunnable() {
340	>	public void realRun() {
341	>	assertFalse(lock.writeLock().tryLock());
342	>	}});
343
344	<	t.start();
345	<	t.join();
277	<	lock.writeLock().unlock();
344	>	awaitTermination(t);
345	>	releaseWriteLock(lock);
346		}
347
348		/**
349		* read-tryLock fails if locked
350		*/
351		public void testReadTryLockWhenLocked() throws InterruptedException {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
353		lock.writeLock().lock();
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	threadAssertFalse(lock.readLock().tryLock());
357	<	}
290	<	});
354	>	Thread t = newStartedThread(new CheckedRunnable() {
355	>	public void realRun() {
356	>	assertFalse(lock.readLock().tryLock());
357	>	}});
358
359	<	t.start();
360	<	t.join();
294	<	lock.writeLock().unlock();
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361		}
362
363		/**
#	Line 300 | Line 366 | public class ReentrantReadWriteLockTest
366		public void testMultipleReadLocks() throws InterruptedException {
367		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368		lock.readLock().lock();
369	<	Thread t = new Thread(new Runnable() {
370	<	public void run() {
371	<	threadAssertTrue(lock.readLock().tryLock());
372	<	lock.readLock().unlock();
373	<	}
308	<	});
369	>	Thread t = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	assertTrue(lock.readLock().tryLock());
372	>	lock.readLock().unlock();
373	>	}});
374
375	<	t.start();
311	<	t.join();
375	>	awaitTermination(t);
376		lock.readLock().unlock();
377		}
378
379		/**
380	<	* A writelock succeeds after reading threads unlock
380	>	* A writelock succeeds only after a reading thread unlocks
381	>	*/
382	>	public void testWriteAfterReadLock() throws InterruptedException {
383	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
384	>	lock.readLock().lock();
385	>
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387	>	public void realRun() {
388	>	assertEquals(1, lock.getReadLockCount());
389	>	lock.writeLock().lock();
390	>	assertEquals(0, lock.getReadLockCount());
391	>	lock.writeLock().unlock();
392	>	}});
393	>	waitForQueuedThread(lock, t);
394	>	assertNotWriteLocked(lock);
395	>	assertEquals(1, lock.getReadLockCount());
396	>	lock.readLock().unlock();
397	>	assertEquals(0, lock.getReadLockCount());
398	>	awaitTermination(t);
399	>	assertNotWriteLocked(lock);
400	>	}
401	>
402	>	/**
403	>	* A writelock succeeds only after reading threads unlock
404		*/
405		public void testWriteAfterMultipleReadLocks() throws InterruptedException {
406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
406	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
407		lock.readLock().lock();
408	<	Thread t1 = new Thread(new Runnable() {
409	<	public void run() {
410	<	lock.readLock().lock();
411	<	lock.readLock().unlock();
412	<	}
413	<	});
414	<	Thread t2 = new Thread(new Runnable() {
415	<	public void run() {
329	<	lock.writeLock().lock();
330	<	lock.writeLock().unlock();
331	<	}
332	<	});
408	>	lock.readLock().lock();
409	>	Thread t1 = newStartedThread(new CheckedRunnable() {
410	>	public void realRun() {
411	>	lock.readLock().lock();
412	>	assertEquals(3, lock.getReadLockCount());
413	>	lock.readLock().unlock();
414	>	}});
415	>	awaitTermination(t1);
416
417	<	t1.start();
418	<	t2.start();
419	<	Thread.sleep(SHORT_DELAY_MS);
417	>	Thread t2 = newStartedThread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	assertEquals(2, lock.getReadLockCount());
420	>	lock.writeLock().lock();
421	>	assertEquals(0, lock.getReadLockCount());
422	>	lock.writeLock().unlock();
423	>	}});
424	>	waitForQueuedThread(lock, t2);
425	>	assertNotWriteLocked(lock);
426	>	assertEquals(2, lock.getReadLockCount());
427		lock.readLock().unlock();
428	<	t1.join(MEDIUM_DELAY_MS);
429	<	t2.join(MEDIUM_DELAY_MS);
430	<	assertTrue(!t1.isAlive());
431	<	assertTrue(!t2.isAlive());
428	>	lock.readLock().unlock();
429	>	assertEquals(0, lock.getReadLockCount());
430	>	awaitTermination(t2);
431	>	assertNotWriteLocked(lock);
432		}
433
434		/**
435	<	* Readlocks succeed after a writing thread unlocks
435	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
436	>	* will block if there is a waiting writer thread.
437	>	*/
438	>	public void testReaderWriterReaderFairFifo() throws InterruptedException {
439	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
440	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
441	>
442	>	lock.readLock().lock();
443	>	Thread t1 = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() {
445	>	assertEquals(1, lock.getReadLockCount());
446	>	lock.writeLock().lock();
447	>	assertEquals(0, lock.getReadLockCount());
448	>	t1GotLock.set(true);
449	>	lock.writeLock().unlock();
450	>	}});
451	>	waitForQueuedThread(lock, t1);
452	>
453	>	Thread t2 = newStartedThread(new CheckedRunnable() {
454	>	public void realRun() {
455	>	assertEquals(1, lock.getReadLockCount());
456	>	lock.readLock().lock();
457	>	assertEquals(1, lock.getReadLockCount());
458	>	assertTrue(t1GotLock.get());
459	>	lock.readLock().unlock();
460	>	}});
461	>	waitForQueuedThread(lock, t2);
462	>	assertTrue(t1.isAlive());
463	>	assertNotWriteLocked(lock);
464	>	assertEquals(1, lock.getReadLockCount());
465	>	lock.readLock().unlock();
466	>	awaitTermination(t1);
467	>	awaitTermination(t2);
468	>	assertNotWriteLocked(lock);
469	>	}
470	>
471	>	/**
472	>	* Readlocks succeed only after a writing thread unlocks
473		*/
474		public void testReadAfterWriteLock() throws InterruptedException {
475	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
475	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
476		lock.writeLock().lock();
477	<	Thread t1 = new Thread(new Runnable() {
478	<	public void run() {
479	<	lock.readLock().lock();
480	<	lock.readLock().unlock();
481	<	}
482	<	});
483	<	Thread t2 = new Thread(new Runnable() {
484	<	public void run() {
485	<	lock.readLock().lock();
486	<	lock.readLock().unlock();
360	<	}
361	<	});
477	>	Thread t1 = newStartedThread(new CheckedRunnable() {
478	>	public void realRun() {
479	>	lock.readLock().lock();
480	>	lock.readLock().unlock();
481	>	}});
482	>	Thread t2 = newStartedThread(new CheckedRunnable() {
483	>	public void realRun() {
484	>	lock.readLock().lock();
485	>	lock.readLock().unlock();
486	>	}});
487
488	<	t1.start();
489	<	t2.start();
490	<	Thread.sleep(SHORT_DELAY_MS);
491	<	lock.writeLock().unlock();
492	<	t1.join(MEDIUM_DELAY_MS);
368	<	t2.join(MEDIUM_DELAY_MS);
369	<	assertTrue(!t1.isAlive());
370	<	assertTrue(!t2.isAlive());
488	>	waitForQueuedThread(lock, t1);
489	>	waitForQueuedThread(lock, t2);
490	>	releaseWriteLock(lock);
491	>	awaitTermination(t1);
492	>	awaitTermination(t2);
493		}
494
495		/**
#	Line 386 | Line 508 | public class ReentrantReadWriteLockTest
508		* other threads are waiting for readlock
509		*/
510		public void testReadHoldingWriteLock2() throws InterruptedException {
511	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
511	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
512		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() {
398	–	public void run() {
399	–	lock.readLock().lock();
400	–	lock.readLock().unlock();
401	–	}
402	–	});
403	–
404	–	t1.start();
405	–	t2.start();
513		lock.readLock().lock();
514		lock.readLock().unlock();
515	<	Thread.sleep(SHORT_DELAY_MS);
515	>
516	>	Thread t1 = newStartedThread(new CheckedRunnable() {
517	>	public void realRun() {
518	>	lock.readLock().lock();
519	>	lock.readLock().unlock();
520	>	}});
521	>	Thread t2 = newStartedThread(new CheckedRunnable() {
522	>	public void realRun() {
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	}});
526	>
527	>	waitForQueuedThread(lock, t1);
528	>	waitForQueuedThread(lock, t2);
529	>	assertWriteLockedBy(lock, Thread.currentThread());
530		lock.readLock().lock();
531		lock.readLock().unlock();
532	<	lock.writeLock().unlock();
533	<	t1.join(MEDIUM_DELAY_MS);
534	<	t2.join(MEDIUM_DELAY_MS);
414	<	assertTrue(!t1.isAlive());
415	<	assertTrue(!t2.isAlive());
532	>	releaseWriteLock(lock);
533	>	awaitTermination(t1);
534	>	awaitTermination(t2);
535		}
536
537		/**
538	<	*  Read lock succeeds if write locked by current thread even if
538	>	* Read lock succeeds if write locked by current thread even if
539		* other threads are waiting for writelock
540		*/
541		public void testReadHoldingWriteLock3() throws InterruptedException {
542	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
542	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543		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() {
432	–	public void run() {
433	–	lock.writeLock().lock();
434	–	lock.writeLock().unlock();
435	–	}
436	–	});
437	–
438	–	t1.start();
439	–	t2.start();
544		lock.readLock().lock();
545		lock.readLock().unlock();
546	<	Thread.sleep(SHORT_DELAY_MS);
546	>
547	>	Thread t1 = newStartedThread(new CheckedRunnable() {
548	>	public void realRun() {
549	>	lock.writeLock().lock();
550	>	lock.writeLock().unlock();
551	>	}});
552	>	Thread t2 = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() {
554	>	lock.writeLock().lock();
555	>	lock.writeLock().unlock();
556	>	}});
557	>
558	>	waitForQueuedThread(lock, t1);
559	>	waitForQueuedThread(lock, t2);
560	>	assertWriteLockedBy(lock, Thread.currentThread());
561		lock.readLock().lock();
562		lock.readLock().unlock();
563	<	lock.writeLock().unlock();
564	<	t1.join(MEDIUM_DELAY_MS);
565	<	t2.join(MEDIUM_DELAY_MS);
448	<	assertTrue(!t1.isAlive());
449	<	assertTrue(!t2.isAlive());
563	>	releaseWriteLock(lock);
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566		}
567
452	–
568		/**
569	<	*  Write lock succeeds if write locked by current thread even if
569	>	* Write lock succeeds if write locked by current thread even if
570		* other threads are waiting for writelock
571		*/
572		public void testWriteHoldingWriteLock4() throws InterruptedException {
573	<	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() {
467	<	public void run() {
468	<	lock.writeLock().lock();
469	<	lock.writeLock().unlock();
470	<	}
471	<	});
472	<
473	<	t1.start();
474	<	t2.start();
573	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574		lock.writeLock().lock();
476	–	lock.writeLock().unlock();
477	–	Thread.sleep(SHORT_DELAY_MS);
575		lock.writeLock().lock();
576		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	–	}
577
578	+	Thread t1 = newStartedThread(new CheckedRunnable() {
579	+	public void realRun() {
580	+	lock.writeLock().lock();
581	+	lock.writeLock().unlock();
582	+	}});
583	+	Thread t2 = newStartedThread(new CheckedRunnable() {
584	+	public void realRun() {
585	+	lock.writeLock().lock();
586	+	lock.writeLock().unlock();
587	+	}});
588	+
589	+	waitForQueuedThread(lock, t1);
590	+	waitForQueuedThread(lock, t2);
591	+	assertWriteLockedBy(lock, Thread.currentThread());
592	+	assertEquals(1, lock.getWriteHoldCount());
593	+	lock.writeLock().lock();
594	+	assertWriteLockedBy(lock, Thread.currentThread());
595	+	assertEquals(2, lock.getWriteHoldCount());
596	+	lock.writeLock().unlock();
597	+	releaseWriteLock(lock);
598	+	awaitTermination(t1);
599	+	awaitTermination(t2);
600	+	}
601
602		/**
603		* Fair Read trylock succeeds if write locked by current thread
#	Line 501 | Line 615 | public class ReentrantReadWriteLockTest
615		* other threads are waiting for readlock
616		*/
617		public void testReadHoldingWriteLockFair2() throws InterruptedException {
618	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
618	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
619		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() {
513	–	public void run() {
514	–	lock.readLock().lock();
515	–	lock.readLock().unlock();
516	–	}
517	–	});
518	–
519	–	t1.start();
520	–	t2.start();
620		lock.readLock().lock();
621		lock.readLock().unlock();
622	<	Thread.sleep(SHORT_DELAY_MS);
622	>
623	>	Thread t1 = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	lock.readLock().lock();
626	>	lock.readLock().unlock();
627	>	}});
628	>	Thread t2 = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	lock.readLock().lock();
631	>	lock.readLock().unlock();
632	>	}});
633	>
634	>	waitForQueuedThread(lock, t1);
635	>	waitForQueuedThread(lock, t2);
636	>	assertWriteLockedBy(lock, Thread.currentThread());
637		lock.readLock().lock();
638		lock.readLock().unlock();
639	<	lock.writeLock().unlock();
640	<	t1.join(MEDIUM_DELAY_MS);
641	<	t2.join(MEDIUM_DELAY_MS);
529	<	assertTrue(!t1.isAlive());
530	<	assertTrue(!t2.isAlive());
639	>	releaseWriteLock(lock);
640	>	awaitTermination(t1);
641	>	awaitTermination(t2);
642		}
643
533	–
644		/**
645		* Fair Read lock succeeds if write locked by current thread even if
646		* other threads are waiting for writelock
647		*/
648		public void testReadHoldingWriteLockFair3() throws InterruptedException {
649	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
649	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
650		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() {
548	–	public void run() {
549	–	lock.writeLock().lock();
550	–	lock.writeLock().unlock();
551	–	}
552	–	});
553	–
554	–	t1.start();
555	–	t2.start();
651		lock.readLock().lock();
652		lock.readLock().unlock();
653	<	Thread.sleep(SHORT_DELAY_MS);
653	>
654	>	Thread t1 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.writeLock().lock();
657	>	lock.writeLock().unlock();
658	>	}});
659	>	Thread t2 = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	lock.writeLock().lock();
662	>	lock.writeLock().unlock();
663	>	}});
664	>
665	>	waitForQueuedThread(lock, t1);
666	>	waitForQueuedThread(lock, t2);
667	>	assertWriteLockedBy(lock, Thread.currentThread());
668		lock.readLock().lock();
669		lock.readLock().unlock();
670	<	lock.writeLock().unlock();
671	<	t1.join(MEDIUM_DELAY_MS);
672	<	t2.join(MEDIUM_DELAY_MS);
564	<	assertTrue(!t1.isAlive());
565	<	assertTrue(!t2.isAlive());
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673		}
674
568	–
675		/**
676		* Fair Write lock succeeds if write locked by current thread even if
677		* other threads are waiting for writelock
678		*/
679		public void testWriteHoldingWriteLockFair4() throws InterruptedException {
680	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
680	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
681		lock.writeLock().lock();
682	<	Thread t1 = new Thread(new Runnable() {
683	<	public void run() {
684	<	lock.writeLock().lock();
685	<	lock.writeLock().unlock();
686	<	}
687	<	});
688	<	Thread t2 = new Thread(new Runnable() {
689	<	public void run() {
690	<	lock.writeLock().lock();
691	<	lock.writeLock().unlock();
586	<	}
587	<	});
682	>	Thread t1 = newStartedThread(new CheckedRunnable() {
683	>	public void realRun() {
684	>	lock.writeLock().lock();
685	>	lock.writeLock().unlock();
686	>	}});
687	>	Thread t2 = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() {
689	>	lock.writeLock().lock();
690	>	lock.writeLock().unlock();
691	>	}});
692
693	<	t1.start();
694	<	t2.start();
695	<	Thread.sleep(SHORT_DELAY_MS);
696	<	assertTrue(lock.isWriteLockedByCurrentThread());
593	<	assertTrue(lock.getWriteHoldCount() == 1);
693	>	waitForQueuedThread(lock, t1);
694	>	waitForQueuedThread(lock, t2);
695	>	assertWriteLockedBy(lock, Thread.currentThread());
696	>	assertEquals(1, lock.getWriteHoldCount());
697		lock.writeLock().lock();
698	<	assertTrue(lock.getWriteHoldCount() == 2);
698	>	assertEquals(2, lock.getWriteHoldCount());
699		lock.writeLock().unlock();
700		lock.writeLock().lock();
701		lock.writeLock().unlock();
702	<	lock.writeLock().unlock();
703	<	t1.join(MEDIUM_DELAY_MS);
704	<	t2.join(MEDIUM_DELAY_MS);
602	<	assertTrue(!t1.isAlive());
603	<	assertTrue(!t2.isAlive());
702	>	releaseWriteLock(lock);
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705		}
706
606	–
707		/**
708		* Read tryLock succeeds if readlocked but not writelocked
709		*/
710		public void testTryLockWhenReadLocked() throws InterruptedException {
711		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712		lock.readLock().lock();
713	<	Thread t = new Thread(new Runnable() {
714	<	public void run() {
715	<	threadAssertTrue(lock.readLock().tryLock());
716	<	lock.readLock().unlock();
717	<	}
618	<	});
713	>	Thread t = newStartedThread(new CheckedRunnable() {
714	>	public void realRun() {
715	>	assertTrue(lock.readLock().tryLock());
716	>	lock.readLock().unlock();
717	>	}});
718
719	<	t.start();
621	<	t.join();
719	>	awaitTermination(t);
720		lock.readLock().unlock();
721		}
722
625	–
626	–
723		/**
724		* write tryLock fails when readlocked
725		*/
726		public void testWriteTryLockWhenReadLocked() throws InterruptedException {
727		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728		lock.readLock().lock();
729	<	Thread t = new Thread(new Runnable() {
730	<	public void run() {
731	<	threadAssertFalse(lock.writeLock().tryLock());
732	<	}
637	<	});
729	>	Thread t = newStartedThread(new CheckedRunnable() {
730	>	public void realRun() {
731	>	assertFalse(lock.writeLock().tryLock());
732	>	}});
733
734	<	t.start();
640	<	t.join();
734	>	awaitTermination(t);
735		lock.readLock().unlock();
736		}
737
644	–
738		/**
739		* Fair Read tryLock succeeds if readlocked but not writelocked
740		*/
741		public void testTryLockWhenReadLockedFair() throws InterruptedException {
742		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743		lock.readLock().lock();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	threadAssertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}
656	<	});
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749
750	<	t.start();
659	<	t.join();
750	>	awaitTermination(t);
751		lock.readLock().unlock();
752		}
753
663	–
664	–
754		/**
755		* Fair write tryLock fails when readlocked
756		*/
757		public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759		lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
675	<	});
760	>	Thread t = newStartedThread(new CheckedRunnable() {
761	>	public void realRun() {
762	>	assertFalse(lock.writeLock().tryLock());
763	>	}});
764
765	<	t.start();
678	<	t.join();
765	>	awaitTermination(t);
766		lock.readLock().unlock();
767		}
768
682	–
683	–
769		/**
770		* write timed tryLock times out if locked
771		*/
772		public void testWriteTryLock_Timeout() throws InterruptedException {
773		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774		lock.writeLock().lock();
775	<	Thread t = new Thread(new CheckedRunnable() {
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776		public void realRun() throws InterruptedException {
777	<	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
777	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
778		}});
779
780	<	t.start();
696	<	t.join();
780	>	awaitTermination(t);
781		assertTrue(lock.writeLock().isHeldByCurrentThread());
782		lock.writeLock().unlock();
783		}
#	Line 704 | Line 788 | public class ReentrantReadWriteLockTest
788		public void testReadTryLock_Timeout() throws InterruptedException {
789		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790		lock.writeLock().lock();
791	<	Thread t = new Thread(new CheckedRunnable() {
791	>	Thread t = newStartedThread(new CheckedRunnable() {
792		public void realRun() throws InterruptedException {
793	<	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
793	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
794		}});
795
796	<	t.start();
713	<	t.join();
796	>	awaitTermination(t);
797		assertTrue(lock.writeLock().isHeldByCurrentThread());
798		lock.writeLock().unlock();
799		}
800
718	–
801		/**
802		* write lockInterruptibly succeeds if lock free else is interruptible
803		*/
804		public void testWriteLockInterruptibly() throws InterruptedException {
805	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
805	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
806		lock.writeLock().lockInterruptibly();
807	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
807	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
808		public void realRun() throws InterruptedException {
809		lock.writeLock().lockInterruptibly();
810		}});
811
812	<	t.start();
731	<	Thread.sleep(SHORT_DELAY_MS);
812	>	waitForQueuedThread(lock, t);
813		t.interrupt();
814	<	Thread.sleep(SHORT_DELAY_MS);
815	<	t.join();
735	<	lock.writeLock().unlock();
814	>	awaitTermination(t);
815	>	releaseWriteLock(lock);
816		}
817
818		/**
819	<	*  read lockInterruptibly succeeds if lock free else is interruptible
819	>	* read lockInterruptibly succeeds if lock free else is interruptible
820		*/
821		public void testReadLockInterruptibly() throws InterruptedException {
822	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
822	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
823		lock.writeLock().lockInterruptibly();
824	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
824	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
825		public void realRun() throws InterruptedException {
826		lock.readLock().lockInterruptibly();
827		}});
828
829	<	t.start();
750	<	Thread.sleep(SHORT_DELAY_MS);
829	>	waitForQueuedThread(lock, t);
830		t.interrupt();
831	<	t.join();
832	<	lock.writeLock().unlock();
831	>	awaitTermination(t);
832	>	releaseWriteLock(lock);
833		}
834
835		/**
#	Line 763 | Line 842 | public class ReentrantReadWriteLockTest
842		c.await();
843		shouldThrow();
844		} catch (IllegalMonitorStateException success) {}
845	+	try {
846	+	c.await(LONG_DELAY_MS, MILLISECONDS);
847	+	shouldThrow();
848	+	} catch (IllegalMonitorStateException success) {}
849	+	try {
850	+	c.awaitNanos(100);
851	+	shouldThrow();
852	+	} catch (IllegalMonitorStateException success) {}
853	+	try {
854	+	c.awaitUninterruptibly();
855	+	shouldThrow();
856	+	} catch (IllegalMonitorStateException success) {}
857		}
858
859		/**
#	Line 778 | Line 869 | public class ReentrantReadWriteLockTest
869		}
870
871		/**
872	+	* Calling signalAll without holding lock throws IllegalMonitorStateException
873	+	*/
874	+	public void testSignalAll_IllegalMonitor() {
875	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
876	+	final Condition c = lock.writeLock().newCondition();
877	+	try {
878	+	c.signalAll();
879	+	shouldThrow();
880	+	} catch (IllegalMonitorStateException success) {}
881	+	}
882	+
883	+	/**
884		* awaitNanos without a signal times out
885		*/
886		public void testAwaitNanos_Timeout() throws InterruptedException {
887		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888		final Condition c = lock.writeLock().newCondition();
786	–
889		lock.writeLock().lock();
890	<	long t = c.awaitNanos(100);
891	<	assertTrue(t <= 0);
890	>	long startTime = System.nanoTime();
891	>	long timeoutMillis = 10;
892	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
893	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
894	>	assertTrue(nanosRemaining <= 0);
895	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
896		lock.writeLock().unlock();
897		}
898
793	–
899		/**
900	<	*  timed await without a signal times out
900	>	* timed await without a signal times out
901		*/
902		public void testAwait_Timeout() throws InterruptedException {
903		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904		final Condition c = lock.writeLock().newCondition();
905		lock.writeLock().lock();
906	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
906	>	long startTime = System.nanoTime();
907	>	long timeoutMillis = 10;
908	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
909	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
910		lock.writeLock().unlock();
911		}
912
#	Line 820 | Line 928 | public class ReentrantReadWriteLockTest
928		public void testAwait() throws InterruptedException {
929		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new CheckedRunnable() {
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedRunnable() {
933		public void realRun() throws InterruptedException {
934		lock.writeLock().lock();
935	+	locked.countDown();
936		c.await();
937		lock.writeLock().unlock();
938		}});
939
940	<	t.start();
831	<	Thread.sleep(SHORT_DELAY_MS);
940	>	locked.await();
941		lock.writeLock().lock();
942		c.signal();
943	+	assertTrue(t.isAlive());
944		lock.writeLock().unlock();
945	<	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	<
844	<	public volatile boolean canAwake = false;
845	<	public volatile boolean interrupted = false;
846	<	public volatile boolean lockStarted = false;
847	<
848	<	public UninterruptableThread(Lock lock, Condition c) {
849	<	this.lock = lock;
850	<	this.c = c;
851	<	}
852	<
853	<	public synchronized void run() {
854	<	lock.lock();
855	<	lockStarted = true;
856	<
857	<	while (!canAwake) {
858	<	c.awaitUninterruptibly();
859	<	}
860	<
861	<	interrupted = isInterrupted();
862	<	lock.unlock();
863	<	}
945	>	awaitTermination(t);
946		}
947
948		/**
#	Line 869 | Line 951 | public class ReentrantReadWriteLockTest
951		public void testAwaitUninterruptibly() throws InterruptedException {
952		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953		final Condition c = lock.writeLock().newCondition();
954	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
955	<
956	<	thread.start();
957	<
958	<	while (!thread.lockStarted) {
959	<	Thread.sleep(100);
960	<	}
954	>	final CountDownLatch locked = new CountDownLatch(1);
955	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
956	>	Thread t = newStartedThread(new CheckedRunnable() {
957	>	public void realRun() {
958	>	lock.writeLock().lock();
959	>	locked.countDown();
960	>	c.awaitUninterruptibly();
961	>	assertTrue(Thread.interrupted());
962	>	lock.writeLock().unlock();
963	>	}});
964
965	+	locked.await();
966		lock.writeLock().lock();
967	<	try {
968	<	thread.interrupt();
969	<	thread.canAwake = true;
970	<	c.signal();
971	<	} finally {
972	<	lock.writeLock().unlock();
973	<	}
974	<
889	<	thread.join();
890	<	assertTrue(thread.interrupted);
891	<	assertFalse(thread.isAlive());
967	>	lock.writeLock().unlock();
968	>	t.interrupt();
969	>	t.join(10);
970	>	assertTrue(t.isAlive());
971	>	lock.writeLock().lock();
972	>	c.signal();
973	>	lock.writeLock().unlock();
974	>	awaitTermination(t);
975		}
976
977		/**
978		* await is interruptible
979		*/
980		public void testAwait_Interrupt() throws InterruptedException {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
981	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
982		final Condition c = lock.writeLock().newCondition();
983	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
983	>	final CountDownLatch locked = new CountDownLatch(1);
984	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
985		public void realRun() throws InterruptedException {
986		lock.writeLock().lock();
987	<	c.await();
988	<	lock.writeLock().unlock();
987	>	assertWriteLockedBy(lock, Thread.currentThread());
988	>	assertHasNoWaiters(lock, c);
989	>	locked.countDown();
990	>	try {
991	>	c.await();
992	>	} finally {
993	>	assertWriteLockedBy(lock, Thread.currentThread());
994	>	assertHasNoWaiters(lock, c);
995	>	lock.writeLock().unlock();
996	>	assertFalse(Thread.interrupted());
997	>	}
998		}});
999
1000	<	t.start();
1001	<	Thread.sleep(SHORT_DELAY_MS);
1000	>	locked.await();
1001	>	assertHasWaiters(lock, c, t);
1002		t.interrupt();
1003	<	t.join(SHORT_DELAY_MS);
1004	<	assertFalse(t.isAlive());
1003	>	awaitTermination(t);
1004	>	assertNotWriteLocked(lock);
1005		}
1006
1007		/**
1008		* awaitNanos is interruptible
1009		*/
1010		public void testAwaitNanos_Interrupt() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1011	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1012		final Condition c = lock.writeLock().newCondition();
1013	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1015		public void realRun() throws InterruptedException {
1016		lock.writeLock().lock();
1017	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1018	<	lock.writeLock().unlock();
1017	>	assertWriteLockedBy(lock, Thread.currentThread());
1018	>	assertHasNoWaiters(lock, c);
1019	>	locked.countDown();
1020	>	try {
1021	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1022	>	} finally {
1023	>	assertWriteLockedBy(lock, Thread.currentThread());
1024	>	assertHasNoWaiters(lock, c);
1025	>	lock.writeLock().unlock();
1026	>	assertFalse(Thread.interrupted());
1027	>	}
1028		}});
1029
1030	<	t.start();
1031	<	Thread.sleep(SHORT_DELAY_MS);
1030	>	locked.await();
1031	>	assertHasWaiters(lock, c, t);
1032		t.interrupt();
1033	<	t.join(SHORT_DELAY_MS);
1034	<	assertFalse(t.isAlive());
1033	>	awaitTermination(t);
1034	>	assertNotWriteLocked(lock);
1035		}
1036
1037		/**
1038		* awaitUntil is interruptible
1039		*/
1040		public void testAwaitUntil_Interrupt() throws InterruptedException {
1041	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1041	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042		final Condition c = lock.writeLock().newCondition();
1043	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1043	>	final CountDownLatch locked = new CountDownLatch(1);
1044	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1045		public void realRun() throws InterruptedException {
1046		lock.writeLock().lock();
1047	+	assertWriteLockedBy(lock, Thread.currentThread());
1048	+	assertHasNoWaiters(lock, c);
1049	+	locked.countDown();
1050		java.util.Date d = new java.util.Date();
1051	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1052	<	lock.writeLock().unlock();
1051	>	try {
1052	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1053	>	} finally {
1054	>	assertWriteLockedBy(lock, Thread.currentThread());
1055	>	assertHasNoWaiters(lock, c);
1056	>	lock.writeLock().unlock();
1057	>	assertFalse(Thread.interrupted());
1058	>	}
1059		}});
1060
1061	<	t.start();
1062	<	Thread.sleep(SHORT_DELAY_MS);
1061	>	locked.await();
1062	>	assertHasWaiters(lock, c, t);
1063		t.interrupt();
1064	<	t.join(SHORT_DELAY_MS);
1065	<	assertFalse(t.isAlive());
1064	>	awaitTermination(t);
1065	>	assertNotWriteLocked(lock);
1066		}
1067
1068		/**
1069		* signalAll wakes up all threads
1070		*/
1071		public void testSignalAll() throws InterruptedException {
1072	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1072	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1073		final Condition c = lock.writeLock().newCondition();
1074	<	Thread t1 = new Thread(new CheckedRunnable() {
1074	>	final CountDownLatch locked = new CountDownLatch(2);
1075	>	final Lock writeLock = lock.writeLock();
1076	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1077		public void realRun() throws InterruptedException {
1078	<	lock.writeLock().lock();
1078	>	writeLock.lock();
1079	>	locked.countDown();
1080		c.await();
1081	<	lock.writeLock().unlock();
1081	>	writeLock.unlock();
1082		}});
1083
1084	<	Thread t2 = new Thread(new CheckedRunnable() {
1084	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1085		public void realRun() throws InterruptedException {
1086	<	lock.writeLock().lock();
1086	>	writeLock.lock();
1087	>	locked.countDown();
1088		c.await();
1089	<	lock.writeLock().unlock();
1089	>	writeLock.unlock();
1090		}});
1091
1092	<	t1.start();
1093	<	t2.start();
1094	<	Thread.sleep(SHORT_DELAY_MS);
978	<	lock.writeLock().lock();
1092	>	locked.await();
1093	>	writeLock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095		c.signalAll();
1096	<	lock.writeLock().unlock();
1097	<	t1.join(SHORT_DELAY_MS);
1098	<	t2.join(SHORT_DELAY_MS);
1099	<	assertFalse(t1.isAlive());
1100	<	assertFalse(t2.isAlive());
1096	>	assertHasNoWaiters(lock, c);
1097	>	writeLock.unlock();
1098	>	awaitTermination(t1);
1099	>	awaitTermination(t2);
1100	>	}
1101	>
1102	>	/**
1103	>	* signal wakes up waiting threads in FIFO order.
1104	>	*/
1105	>	public void testSignalWakesFifo() throws InterruptedException {
1106	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1107	>	final Condition c = lock.writeLock().newCondition();
1108	>	final CountDownLatch locked1 = new CountDownLatch(1);
1109	>	final CountDownLatch locked2 = new CountDownLatch(1);
1110	>	final Lock writeLock = lock.writeLock();
1111	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1112	>	public void realRun() throws InterruptedException {
1113	>	writeLock.lock();
1114	>	locked1.countDown();
1115	>	c.await();
1116	>	writeLock.unlock();
1117	>	}});
1118	>
1119	>	locked1.await();
1120	>
1121	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked2.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked2.await();
1130	>
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	assertFalse(lock.hasQueuedThreads());
1134	>	c.signal();
1135	>	assertHasWaiters(lock, c, t2);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	c.signal();
1139	>	assertHasNoWaiters(lock, c);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	writeLock.unlock();
1143	>	awaitTermination(t1);
1144	>	awaitTermination(t2);
1145		}
1146
1147		/**
#	Line 1008 | Line 1168 | public class ReentrantReadWriteLockTest
1168		* hasQueuedThreads reports whether there are waiting threads
1169		*/
1170		public void testhasQueuedThreads() throws InterruptedException {
1171	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1171	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1172		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1173		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1174		assertFalse(lock.hasQueuedThreads());
1175		lock.writeLock().lock();
1176	+	assertFalse(lock.hasQueuedThreads());
1177	+	long startTime = System.nanoTime();
1178		t1.start();
1179	<	Thread.sleep(SHORT_DELAY_MS);
1018	<	assertTrue(lock.hasQueuedThreads());
1179	>	waitForQueuedThread(lock, t1);
1180		t2.start();
1181	<	Thread.sleep(SHORT_DELAY_MS);
1181	>	waitForQueuedThread(lock, t2);
1182		assertTrue(lock.hasQueuedThreads());
1183		t1.interrupt();
1184	<	Thread.sleep(SHORT_DELAY_MS);
1184	>	awaitTermination(t1);
1185		assertTrue(lock.hasQueuedThreads());
1186		lock.writeLock().unlock();
1187	<	Thread.sleep(SHORT_DELAY_MS);
1187	>	awaitTermination(t2);
1188		assertFalse(lock.hasQueuedThreads());
1028	–	t1.join();
1029	–	t2.join();
1189		}
1190
1191		/**
#	Line 1044 | Line 1203 | public class ReentrantReadWriteLockTest
1203		* hasQueuedThread reports whether a thread is queued.
1204		*/
1205		public void testHasQueuedThread() throws InterruptedException {
1206	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1207	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1208	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1209	<	assertFalse(sync.hasQueuedThread(t1));
1210	<	assertFalse(sync.hasQueuedThread(t2));
1211	<	sync.writeLock().lock();
1206	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1207	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1208	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1209	>	assertFalse(lock.hasQueuedThread(t1));
1210	>	assertFalse(lock.hasQueuedThread(t2));
1211	>	lock.writeLock().lock();
1212	>	long startTime = System.nanoTime();
1213		t1.start();
1214	<	Thread.sleep(SHORT_DELAY_MS);
1215	<	assertTrue(sync.hasQueuedThread(t1));
1214	>	waitForQueuedThread(lock, t1);
1215	>	assertTrue(lock.hasQueuedThread(t1));
1216	>	assertFalse(lock.hasQueuedThread(t2));
1217		t2.start();
1218	<	Thread.sleep(SHORT_DELAY_MS);
1219	<	assertTrue(sync.hasQueuedThread(t1));
1220	<	assertTrue(sync.hasQueuedThread(t2));
1218	>	waitForQueuedThread(lock, t2);
1219	>	assertTrue(lock.hasQueuedThread(t1));
1220	>	assertTrue(lock.hasQueuedThread(t2));
1221		t1.interrupt();
1222	<	Thread.sleep(SHORT_DELAY_MS);
1223	<	assertFalse(sync.hasQueuedThread(t1));
1224	<	assertTrue(sync.hasQueuedThread(t2));
1225	<	sync.writeLock().unlock();
1226	<	Thread.sleep(SHORT_DELAY_MS);
1227	<	assertFalse(sync.hasQueuedThread(t1));
1228	<	Thread.sleep(SHORT_DELAY_MS);
1068	<	assertFalse(sync.hasQueuedThread(t2));
1069	<	t1.join();
1070	<	t2.join();
1222	>	awaitTermination(t1);
1223	>	assertFalse(lock.hasQueuedThread(t1));
1224	>	assertTrue(lock.hasQueuedThread(t2));
1225	>	lock.writeLock().unlock();
1226	>	awaitTermination(t2);
1227	>	assertFalse(lock.hasQueuedThread(t1));
1228	>	assertFalse(lock.hasQueuedThread(t2));
1229		}
1230
1073	–
1231		/**
1232		* getQueueLength reports number of waiting threads
1233		*/
1234		public void testGetQueueLength() throws InterruptedException {
1235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1235	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1236		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1237		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1238		assertEquals(0, lock.getQueueLength());
1239		lock.writeLock().lock();
1240	+	long startTime = System.nanoTime();
1241		t1.start();
1242	<	Thread.sleep(SHORT_DELAY_MS);
1242	>	waitForQueuedThread(lock, t1);
1243		assertEquals(1, lock.getQueueLength());
1244		t2.start();
1245	<	Thread.sleep(SHORT_DELAY_MS);
1245	>	waitForQueuedThread(lock, t2);
1246		assertEquals(2, lock.getQueueLength());
1247		t1.interrupt();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1248	>	awaitTermination(t1);
1249		assertEquals(1, lock.getQueueLength());
1250		lock.writeLock().unlock();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1251	>	awaitTermination(t2);
1252		assertEquals(0, lock.getQueueLength());
1095	–	t1.join();
1096	–	t2.join();
1253		}
1254
1255		/**
#	Line 1105 | Line 1261 | public class ReentrantReadWriteLockTest
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262		assertTrue(lock.getQueuedThreads().isEmpty());
1263		lock.writeLock().lock();
1264	+	long startTime = System.nanoTime();
1265		assertTrue(lock.getQueuedThreads().isEmpty());
1266		t1.start();
1267	<	Thread.sleep(SHORT_DELAY_MS);
1267	>	waitForQueuedThread(lock, t1);
1268	>	assertEquals(1, lock.getQueuedThreads().size());
1269		assertTrue(lock.getQueuedThreads().contains(t1));
1270		t2.start();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1271	>	waitForQueuedThread(lock, t2);
1272	>	assertEquals(2, lock.getQueuedThreads().size());
1273		assertTrue(lock.getQueuedThreads().contains(t1));
1274		assertTrue(lock.getQueuedThreads().contains(t2));
1275		t1.interrupt();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1276	>	awaitTermination(t1);
1277		assertFalse(lock.getQueuedThreads().contains(t1));
1278		assertTrue(lock.getQueuedThreads().contains(t2));
1279	+	assertEquals(1, lock.getQueuedThreads().size());
1280		lock.writeLock().unlock();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1281	>	awaitTermination(t2);
1282		assertTrue(lock.getQueuedThreads().isEmpty());
1123	–	t1.join();
1124	–	t2.join();
1283		}
1284
1285		/**
#	Line 1146 | Line 1304 | public class ReentrantReadWriteLockTest
1304		} catch (NullPointerException success) {}
1305		}
1306
1149	–
1307		/**
1308		* getWaitingThreads throws NPE if null
1309		*/
#	Line 1183 | Line 1340 | public class ReentrantReadWriteLockTest
1340		} catch (IllegalMonitorStateException success) {}
1341		}
1342
1186	–
1343		/**
1344		* getWaitQueueLength throws IAE if not owned
1345		*/
#	Line 1209 | Line 1365 | public class ReentrantReadWriteLockTest
1365		} catch (IllegalMonitorStateException success) {}
1366		}
1367
1212	–
1368		/**
1369		* getWaitingThreads throws IAE if not owned
1370		*/
#	Line 1235 | Line 1390 | public class ReentrantReadWriteLockTest
1390		} catch (IllegalMonitorStateException success) {}
1391		}
1392
1238	–
1393		/**
1394		* hasWaiters returns true when a thread is waiting, else false
1395		*/
1396		public void testHasWaiters() throws InterruptedException {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1398		final Condition c = lock.writeLock().newCondition();
1399	<	Thread t = new Thread(new CheckedRunnable() {
1399	>	final CountDownLatch locked = new CountDownLatch(1);
1400	>	Thread t = newStartedThread(new CheckedRunnable() {
1401		public void realRun() throws InterruptedException {
1402		lock.writeLock().lock();
1403	<	threadAssertFalse(lock.hasWaiters(c));
1404	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1403	>	assertFalse(lock.hasWaiters(c));
1404	>	locked.countDown();
1405	>	assertEquals(0, lock.getWaitQueueLength(c));
1406		c.await();
1407		lock.writeLock().unlock();
1408		}});
1409
1410	<	t.start();
1255	<	Thread.sleep(SHORT_DELAY_MS);
1410	>	locked.await();
1411		lock.writeLock().lock();
1412		assertTrue(lock.hasWaiters(c));
1413		assertEquals(1, lock.getWaitQueueLength(c));
1414		c.signal();
1415	+	assertHasNoWaiters(lock, c);
1416		lock.writeLock().unlock();
1417	<	Thread.sleep(SHORT_DELAY_MS);
1418	<	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());
1417	>	awaitTermination(t);
1418	>	assertHasNoWaiters(lock, c);
1419		}
1420
1421		/**
1422		* getWaitQueueLength returns number of waiting threads
1423		*/
1424		public void testGetWaitQueueLength() throws InterruptedException {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1425	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1426		final Condition c = lock.writeLock().newCondition();
1427	<	Thread t = new Thread(new CheckedRunnable() {
1427	>	final CountDownLatch locked = new CountDownLatch(1);
1428	>	Thread t = newStartedThread(new CheckedRunnable() {
1429		public void realRun() throws InterruptedException {
1430		lock.writeLock().lock();
1431	<	threadAssertFalse(lock.hasWaiters(c));
1432	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1431	>	assertEquals(0, lock.getWaitQueueLength(c));
1432	>	locked.countDown();
1433		c.await();
1434		lock.writeLock().unlock();
1435		}});
1436
1437	<	t.start();
1286	<	Thread.sleep(SHORT_DELAY_MS);
1437	>	locked.await();
1438		lock.writeLock().lock();
1439	<	assertTrue(lock.hasWaiters(c));
1439	>	assertHasWaiters(lock, c, t);
1440		assertEquals(1, lock.getWaitQueueLength(c));
1441		c.signal();
1442	<	lock.writeLock().unlock();
1292	<	Thread.sleep(SHORT_DELAY_MS);
1293	<	lock.writeLock().lock();
1294	<	assertFalse(lock.hasWaiters(c));
1442	>	assertHasNoWaiters(lock, c);
1443		assertEquals(0, lock.getWaitQueueLength(c));
1444		lock.writeLock().unlock();
1445	<	t.join(SHORT_DELAY_MS);
1298	<	assertFalse(t.isAlive());
1445	>	awaitTermination(t);
1446		}
1447
1301	–
1448		/**
1449		* getWaitingThreads returns only and all waiting threads
1450		*/
1451		public void testGetWaitingThreads() throws InterruptedException {
1452		final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1453		final Condition c = lock.writeLock().newCondition();
1454	+	final CountDownLatch locked1 = new CountDownLatch(1);
1455	+	final CountDownLatch locked2 = new CountDownLatch(1);
1456		Thread t1 = new Thread(new CheckedRunnable() {
1457		public void realRun() throws InterruptedException {
1458		lock.writeLock().lock();
1459	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1459	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1460	>	locked1.countDown();
1461		c.await();
1462		lock.writeLock().unlock();
1463		}});
#	Line 1316 | Line 1465 | public class ReentrantReadWriteLockTest
1465		Thread t2 = new Thread(new CheckedRunnable() {
1466		public void realRun() throws InterruptedException {
1467		lock.writeLock().lock();
1468	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1468	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1469	>	locked2.countDown();
1470		c.await();
1471		lock.writeLock().unlock();
1472		}});
#	Line 1324 | Line 1474 | public class ReentrantReadWriteLockTest
1474		lock.writeLock().lock();
1475		assertTrue(lock.getWaitingThreads(c).isEmpty());
1476		lock.writeLock().unlock();
1477	+
1478		t1.start();
1479	<	Thread.sleep(SHORT_DELAY_MS);
1479	>	locked1.await();
1480		t2.start();
1481	<	Thread.sleep(SHORT_DELAY_MS);
1481	>	locked2.await();
1482	>
1483		lock.writeLock().lock();
1484		assertTrue(lock.hasWaiters(c));
1485		assertTrue(lock.getWaitingThreads(c).contains(t1));
1486		assertTrue(lock.getWaitingThreads(c).contains(t2));
1487	+	assertEquals(2, lock.getWaitingThreads(c).size());
1488		c.signalAll();
1489	+	assertHasNoWaiters(lock, c);
1490		lock.writeLock().unlock();
1491	<	Thread.sleep(SHORT_DELAY_MS);
1492	<	lock.writeLock().lock();
1493	<	assertFalse(lock.hasWaiters(c));
1494	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1495	<	lock.writeLock().unlock();
1342	<	t1.join(SHORT_DELAY_MS);
1343	<	t2.join(SHORT_DELAY_MS);
1344	<	assertFalse(t1.isAlive());
1345	<	assertFalse(t2.isAlive());
1491	>
1492	>	awaitTermination(t1);
1493	>	awaitTermination(t2);
1494	>
1495	>	assertHasNoWaiters(lock, c);
1496		}
1497
1498		/**

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