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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.15 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.59 by jsr166, Sat May 7 19:03:26 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	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56		}
57	<	public Collection<Thread> getWaitingThreads(Condition c) {
58	<	return super.getWaitingThreads(c);
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59		}
60	+	public Collection<Thread> getWaitingThreads(Condition c) {
61	+	return super.getWaitingThreads(c);
62	+	}
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());
141	>	public void testConstructor() {
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	<	assertEquals(0, rl.getReadLockCount());
169	<	rl.writeLock().unlock();
170	<	assertFalse(rl.isWriteLocked());
171	<	assertFalse(rl.isWriteLockedByCurrentThread());
172	<	assertEquals(0, rl.getReadLockCount());
173	<	rl.readLock().lock();
174	<	assertFalse(rl.isWriteLocked());
175	<	assertFalse(rl.isWriteLockedByCurrentThread());
176	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	assertEquals(0, rl.getReadLockCount());
163	>	public void testLock() {
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
102	–
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	<	assertEquals(0, rl.getReadLockCount());
188	<	rl.writeLock().unlock();
189	<	assertFalse(rl.isWriteLocked());
190	<	assertFalse(rl.isWriteLockedByCurrentThread());
191	<	assertEquals(0, rl.getReadLockCount());
192	<	rl.readLock().lock();
193	<	assertFalse(rl.isWriteLocked());
194	<	assertFalse(rl.isWriteLockedByCurrentThread());
195	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
182	>	public void testFairLock() {
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		/**
199		* getWriteHoldCount returns number of recursive holds
200		*/
201	+	public void testGetWriteHoldCount() {
202	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	+	for (int i = 1; i <= SIZE; i++) {
204	+	lock.writeLock().lock();
205	+	assertEquals(i,lock.getWriteHoldCount());
206	+	}
207	+	for (int i = SIZE; i > 0; i--) {
208	+	lock.writeLock().unlock();
209	+	assertEquals(i-1,lock.getWriteHoldCount());
210	+	}
211	+	}
212	+
213	+	/**
214	+	* WriteLock.getHoldCount returns number of recursive holds
215	+	*/
216		public void testGetHoldCount() {
217	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	<	for(int i = 1; i <= SIZE; i++) {
219	<	lock.writeLock().lock();
220	<	assertEquals(i,lock.getWriteHoldCount());
221	<	}
222	<	for(int i = SIZE; i > 0; i--) {
223	<	lock.writeLock().unlock();
224	<	assertEquals(i-1,lock.getWriteHoldCount());
225	<	}
217	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	>	for (int i = 1; i <= SIZE; i++) {
219	>	lock.writeLock().lock();
220	>	assertEquals(i,lock.writeLock().getHoldCount());
221	>	}
222	>	for (int i = SIZE; i > 0; i--) {
223	>	lock.writeLock().unlock();
224	>	assertEquals(i-1,lock.writeLock().getHoldCount());
225	>	}
226	>	}
227	>
228	>	/**
229	>	* getReadHoldCount returns number of recursive holds
230	>	*/
231	>	public void testGetReadHoldCount() {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.readLock().lock();
235	>	assertEquals(i,lock.getReadHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238	>	lock.readLock().unlock();
239	>	assertEquals(i-1,lock.getReadHoldCount());
240	>	}
241		}
140	–
242
243		/**
244		* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testUnlock_IllegalMonitorStateException() {
247	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
248	<	try {
249	<	rl.writeLock().unlock();
250	<	shouldThrow();
251	<	} catch(IllegalMonitorStateException success){}
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	>	try {
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() {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	lock.writeLock().lock();
271	<	Thread t = new Thread(new Runnable() {
272	<	public void run() {
273	<	try {
274	<	lock.writeLock().lockInterruptibly();
275	<	threadShouldThrow();
276	<	} catch(InterruptedException success){}
277	<	}
278	<	});
279	<	try {
280	<	t.start();
170	<	t.interrupt();
171	<	lock.writeLock().unlock();
172	<	t.join();
173	<	} catch(Exception e){
174	<	unexpectedException();
175	<	}
176	<	}
268	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
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();
274	>	}});
275	>
276	>	waitForQueuedThread(lock, t);
277	>	t.interrupt();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280	>	}
281
282		/**
283		* timed write-tryLock is interruptible
284		*/
285	<	public void testWriteTryLock_Interrupted() {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287	<	lock.writeLock().lock();
288	<	Thread t = new Thread(new Runnable() {
289	<	public void run() {
290	<	try {
291	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
292	<	threadShouldThrow();
293	<	} catch(InterruptedException success){}
294	<	}
295	<	});
296	<	try {
193	<	t.start();
194	<	t.interrupt();
195	<	lock.writeLock().unlock();
196	<	t.join();
197	<	} catch(Exception e){
198	<	unexpectedException();
199	<	}
285	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
286	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
287	>	lock.writeLock().lock();
288	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
289	>	public void realRun() throws InterruptedException {
290	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
291	>	}});
292	>
293	>	waitForQueuedThread(lock, t);
294	>	t.interrupt();
295	>	awaitTermination(t);
296	>	releaseWriteLock(lock);
297		}
298
299		/**
300		* read-lockInterruptibly is interruptible
301		*/
302	<	public void testReadLockInterruptibly_Interrupted() {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	<	lock.writeLock().lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	try {
308	<	lock.readLock().lockInterruptibly();
309	<	threadShouldThrow();
310	<	} catch(InterruptedException success){}
311	<	}
312	<	});
313	<	try {
314	<	t.start();
218	<	t.interrupt();
219	<	lock.writeLock().unlock();
220	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
302	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
303	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
304	>	lock.writeLock().lock();
305	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
306	>	public void realRun() throws InterruptedException {
307	>	lock.readLock().lockInterruptibly();
308	>	}});
309	>
310	>	waitForQueuedThread(lock, t);
311	>	t.interrupt();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314	>	}
315
316		/**
317		* timed read-tryLock is interruptible
318		*/
319	<	public void testReadTryLock_Interrupted() {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
321	<	lock.writeLock().lock();
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	try {
325	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
326	<	threadShouldThrow();
327	<	} catch(InterruptedException success){}
328	<	}
329	<	});
330	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
319	>	public void testReadTryLock_Interrupted() throws InterruptedException {
320	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
321	>	lock.writeLock().lock();
322	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
323	>	public void realRun() throws InterruptedException {
324	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
325	>	}});
326	>
327	>	waitForQueuedThread(lock, t);
328	>	t.interrupt();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331		}
332
249	–
333		/**
334		* write-tryLock fails if locked
335		*/
336	<	public void testWriteTryLockWhenLocked() {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
338	<	lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	threadAssertFalse(lock.writeLock().tryLock());
342	<	}
343	<	});
344	<	try {
345	<	t.start();
346	<	t.join();
264	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
336	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
337	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
338	>	lock.writeLock().lock();
339	>	Thread t = newStartedThread(new CheckedRunnable() {
340	>	public void realRun() {
341	>	assertFalse(lock.writeLock().tryLock());
342	>	}});
343	>
344	>	awaitTermination(t);
345	>	releaseWriteLock(lock);
346	>	}
347
348		/**
349		* read-tryLock fails if locked
350		*/
351	<	public void testReadTryLockWhenLocked() {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
353	<	lock.writeLock().lock();
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	threadAssertFalse(lock.readLock().tryLock());
357	<	}
358	<	});
359	<	try {
360	<	t.start();
361	<	t.join();
284	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
351	>	public void testReadTryLockWhenLocked() throws InterruptedException {
352	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
353	>	lock.writeLock().lock();
354	>	Thread t = newStartedThread(new CheckedRunnable() {
355	>	public void realRun() {
356	>	assertFalse(lock.readLock().tryLock());
357	>	}});
358	>
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361	>	}
362
363		/**
364		* Multiple threads can hold a read lock when not write-locked
365		*/
366	<	public void testMultipleReadLocks() {
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	<	}
374	<	});
375	<	try {
376	<	t.start();
377	<	t.join();
378	<	lock.readLock().unlock();
379	<	} catch(Exception e){
380	<	unexpectedException();
381	<	}
382	<	}
366	>	public void testMultipleReadLocks() throws InterruptedException {
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	assertTrue(lock.readLock().tryLock());
372	>	lock.readLock().unlock();
373	>	}});
374	>
375	>	awaitTermination(t);
376	>	lock.readLock().unlock();
377	>	}
378	>
379	>	/**
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
407	>	lock.readLock().lock();
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	>	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	>	lock.readLock().unlock();
429	>	assertEquals(0, lock.getReadLockCount());
430	>	awaitTermination(t2);
431	>	assertNotWriteLocked(lock);
432	>	}
433	>
434	>	/**
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
476	>	lock.writeLock().lock();
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	>	waitForQueuedThread(lock, t1);
489	>	waitForQueuedThread(lock, t2);
490	>	releaseWriteLock(lock);
491	>	awaitTermination(t1);
492	>	awaitTermination(t2);
493	>	}
494	>
495	>	/**
496	>	* Read trylock succeeds if write locked by current thread
497	>	*/
498	>	public void testReadHoldingWriteLock() {
499	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
500	>	lock.writeLock().lock();
501	>	assertTrue(lock.readLock().tryLock());
502	>	lock.readLock().unlock();
503	>	lock.writeLock().unlock();
504	>	}
505	>
506	>	/**
507	>	* Read lock succeeds if write locked by current thread even if
508	>	* other threads are waiting for readlock
509	>	*/
510	>	public void testReadHoldingWriteLock2() throws InterruptedException {
511	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
512	>	lock.writeLock().lock();
513	>	lock.readLock().lock();
514	>	lock.readLock().unlock();
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	>	releaseWriteLock(lock);
533	>	awaitTermination(t1);
534	>	awaitTermination(t2);
535	>	}
536	>
537	>	/**
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543	>	lock.writeLock().lock();
544	>	lock.readLock().lock();
545	>	lock.readLock().unlock();
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	>	releaseWriteLock(lock);
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566	>	}
567	>
568	>	/**
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574	>	lock.writeLock().lock();
575	>	lock.writeLock().lock();
576	>	lock.writeLock().unlock();
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
604	>	*/
605	>	public void testReadHoldingWriteLockFair() {
606	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	>	lock.writeLock().lock();
608	>	assertTrue(lock.readLock().tryLock());
609	>	lock.readLock().unlock();
610	>	lock.writeLock().unlock();
611	>	}
612	>
613	>	/**
614	>	* Fair Read lock succeeds if write locked by current thread even if
615	>	* other threads are waiting for readlock
616	>	*/
617	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
618	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
619	>	lock.writeLock().lock();
620	>	lock.readLock().lock();
621	>	lock.readLock().unlock();
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	>	releaseWriteLock(lock);
640	>	awaitTermination(t1);
641	>	awaitTermination(t2);
642	>	}
643	>
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
650	>	lock.writeLock().lock();
651	>	lock.readLock().lock();
652	>	lock.readLock().unlock();
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	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673	>	}
674	>
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 PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
681	>	lock.writeLock().lock();
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	>	waitForQueuedThread(lock, t1);
694	>	waitForQueuedThread(lock, t2);
695	>	assertWriteLockedBy(lock, Thread.currentThread());
696	>	assertEquals(1, lock.getWriteHoldCount());
697	>	lock.writeLock().lock();
698	>	assertEquals(2, lock.getWriteHoldCount());
699	>	lock.writeLock().unlock();
700	>	lock.writeLock().lock();
701	>	lock.writeLock().unlock();
702	>	releaseWriteLock(lock);
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705	>	}
706
707		/**
708	<	* A writelock succeeds after reading threads unlock
708	>	* Read tryLock succeeds if readlocked but not writelocked
709		*/
710	<	public void testWriteAfterMultipleReadLocks() {
711	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	<	lock.readLock().lock();
713	<	Thread t1 = new Thread(new Runnable() {
714	<	public void run() {
715	<	lock.readLock().lock();
716	<	lock.readLock().unlock();
717	<	}
322	<	});
323	<	Thread t2 = new Thread(new Runnable() {
324	<	public void run() {
325	<	lock.writeLock().lock();
326	<	lock.writeLock().unlock();
327	<	}
328	<	});
710	>	public void testTryLockWhenReadLocked() throws InterruptedException {
711	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	>	lock.readLock().lock();
713	>	Thread t = newStartedThread(new CheckedRunnable() {
714	>	public void realRun() {
715	>	assertTrue(lock.readLock().tryLock());
716	>	lock.readLock().unlock();
717	>	}});
718
719	<	try {
720	<	t1.start();
721	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	lock.readLock().unlock();
335	<	t1.join(MEDIUM_DELAY_MS);
336	<	t2.join(MEDIUM_DELAY_MS);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
719	>	awaitTermination(t);
720	>	lock.readLock().unlock();
721	>	}
722
723		/**
724	<	* Readlocks succeed after a writing thread unlocks
724	>	* write tryLock fails when readlocked
725		*/
726	<	public void testReadAfterWriteLock() {
727	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	<	lock.writeLock().lock();
729	<	Thread t1 = new Thread(new Runnable() {
730	<	public void run() {
731	<	lock.readLock().lock();
732	<	lock.readLock().unlock();
355	<	}
356	<	});
357	<	Thread t2 = new Thread(new Runnable() {
358	<	public void run() {
359	<	lock.readLock().lock();
360	<	lock.readLock().unlock();
361	<	}
362	<	});
363	<
364	<	try {
365	<	t1.start();
366	<	t2.start();
367	<	Thread.sleep(SHORT_DELAY_MS);
368	<	lock.writeLock().unlock();
369	<	t1.join(MEDIUM_DELAY_MS);
370	<	t2.join(MEDIUM_DELAY_MS);
371	<	assertTrue(!t1.isAlive());
372	<	assertTrue(!t2.isAlive());
373	<
374	<	} catch(Exception e){
375	<	unexpectedException();
376	<	}
377	<	}
726	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
727	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	>	lock.readLock().lock();
729	>	Thread t = newStartedThread(new CheckedRunnable() {
730	>	public void realRun() {
731	>	assertFalse(lock.writeLock().tryLock());
732	>	}});
733
734	+	awaitTermination(t);
735	+	lock.readLock().unlock();
736	+	}
737
738		/**
739	<	* Read tryLock succeeds if readlocked but not writelocked
739	>	* Fair Read tryLock succeeds if readlocked but not writelocked
740		*/
741	<	public void testTryLockWhenReadLocked() {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	}
391	<	});
392	<	try {
393	<	t.start();
394	<	t.join();
395	<	lock.readLock().unlock();
396	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
741	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	>	lock.readLock().lock();
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749
750	<
750	>	awaitTermination(t);
751	>	lock.readLock().unlock();
752	>	}
753
754		/**
755	<	* write tryLock fails when readlocked
755	>	* Fair write tryLock fails when readlocked
756		*/
757	<	public void testWriteTryLockWhenReadLocked() {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	<	lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
413	<	});
414	<	try {
415	<	t.start();
416	<	t.join();
417	<	lock.readLock().unlock();
418	<	} catch(Exception e){
419	<	unexpectedException();
420	<	}
421	<	}
757	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759	>	lock.readLock().lock();
760	>	Thread t = newStartedThread(new CheckedRunnable() {
761	>	public void realRun() {
762	>	assertFalse(lock.writeLock().tryLock());
763	>	}});
764
765	<
765	>	awaitTermination(t);
766	>	lock.readLock().unlock();
767	>	}
768
769		/**
770		* write timed tryLock times out if locked
771		*/
772	<	public void testWriteTryLock_Timeout() {
773	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	<	lock.writeLock().lock();
775	<	Thread t = new Thread(new Runnable() {
776	<	public void run() {
777	<	try {
778	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
779	<	} catch (Exception ex) {
780	<	threadUnexpectedException();
781	<	}
782	<	}
783	<	});
784	<	try {
785	<	t.start();
786	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
772	>	public void testWriteTryLock_Timeout() throws InterruptedException {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	>	lock.writeLock().lock();
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776	>	public void realRun() throws InterruptedException {
777	>	long startTime = System.nanoTime();
778	>	long timeoutMillis = 10;
779	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
780	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
781	>	}});
782	>
783	>	awaitTermination(t);
784	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
785	>	lock.writeLock().unlock();
786	>	}
787
788		/**
789		* read timed tryLock times out if write-locked
790		*/
791	<	public void testReadTryLock_Timeout() {
792	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
793	<	lock.writeLock().lock();
794	<	Thread t = new Thread(new Runnable() {
795	<	public void run() {
796	<	try {
797	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
798	<	} catch (Exception ex) {
799	<	threadUnexpectedException();
800	<	}
801	<	}
802	<	});
803	<	try {
804	<	t.start();
805	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
472	<
791	>	public void testReadTryLock_Timeout() throws InterruptedException {
792	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
793	>	lock.writeLock().lock();
794	>	Thread t = newStartedThread(new CheckedRunnable() {
795	>	public void realRun() throws InterruptedException {
796	>	long startTime = System.nanoTime();
797	>	long timeoutMillis = 10;
798	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
799	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
800	>	}});
801	>
802	>	awaitTermination(t);
803	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
804	>	lock.writeLock().unlock();
805	>	}
806
807		/**
808		* write lockInterruptibly succeeds if lock free else is interruptible
809		*/
810	<	public void testWriteLockInterruptibly() {
811	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
812	<	try {
813	<	lock.writeLock().lockInterruptibly();
814	<	} catch(Exception e) {
815	<	unexpectedException();
816	<	}
817	<	Thread t = new Thread(new Runnable() {
818	<	public void run() {
819	<	try {
820	<	lock.writeLock().lockInterruptibly();
821	<	threadShouldThrow();
489	<	}
490	<	catch(InterruptedException success) {
491	<	}
492	<	}
493	<	});
494	<	try {
495	<	t.start();
496	<	t.interrupt();
497	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
810	>	public void testWriteLockInterruptibly() throws InterruptedException {
811	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
812	>	lock.writeLock().lockInterruptibly();
813	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
814	>	public void realRun() throws InterruptedException {
815	>	lock.writeLock().lockInterruptibly();
816	>	}});
817	>
818	>	waitForQueuedThread(lock, t);
819	>	t.interrupt();
820	>	awaitTermination(t);
821	>	releaseWriteLock(lock);
822		}
823
824		/**
825	<	*  read lockInterruptibly succeeds if lock free else is interruptible
825	>	* read lockInterruptibly succeeds if lock free else is interruptible
826		*/
827	<	public void testReadLockInterruptibly() {
828	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
829	<	try {
830	<	lock.writeLock().lockInterruptibly();
831	<	} catch(Exception e) {
832	<	unexpectedException();
833	<	}
834	<	Thread t = new Thread(new Runnable() {
835	<	public void run() {
836	<	try {
837	<	lock.readLock().lockInterruptibly();
838	<	threadShouldThrow();
519	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
524	<	try {
525	<	t.start();
526	<	t.interrupt();
527	<	t.join();
528	<	lock.writeLock().unlock();
529	<	} catch(Exception e){
530	<	unexpectedException();
531	<	}
827	>	public void testReadLockInterruptibly() throws InterruptedException {
828	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
829	>	lock.writeLock().lockInterruptibly();
830	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
831	>	public void realRun() throws InterruptedException {
832	>	lock.readLock().lockInterruptibly();
833	>	}});
834	>
835	>	waitForQueuedThread(lock, t);
836	>	t.interrupt();
837	>	awaitTermination(t);
838	>	releaseWriteLock(lock);
839		}
840
841		/**
842		* Calling await without holding lock throws IllegalMonitorStateException
843		*/
844	<	public void testAwait_IllegalMonitor() {
845	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	>	public void testAwait_IllegalMonitor() throws InterruptedException {
845	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846		final Condition c = lock.writeLock().newCondition();
847		try {
848		c.await();
849		shouldThrow();
850	<	}
851	<	catch (IllegalMonitorStateException success) {
852	<	}
546	<	catch (Exception ex) {
850	>	} catch (IllegalMonitorStateException success) {}
851	>	try {
852	>	c.await(LONG_DELAY_MS, MILLISECONDS);
853		shouldThrow();
854	<	}
854	>	} catch (IllegalMonitorStateException success) {}
855	>	try {
856	>	c.awaitNanos(100);
857	>	shouldThrow();
858	>	} catch (IllegalMonitorStateException success) {}
859	>	try {
860	>	c.awaitUninterruptibly();
861	>	shouldThrow();
862	>	} catch (IllegalMonitorStateException success) {}
863		}
864
865		/**
866		* Calling signal without holding lock throws IllegalMonitorStateException
867		*/
868		public void testSignal_IllegalMonitor() {
869	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870		final Condition c = lock.writeLock().newCondition();
871		try {
872		c.signal();
873		shouldThrow();
874	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
874	>	} catch (IllegalMonitorStateException success) {}
875		}
876
877		/**
878	<	* awaitNanos without a signal times out
878	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
879		*/
880	<	public void testAwaitNanos_Timeout() {
881	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
880	>	public void testSignalAll_IllegalMonitor() {
881	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
882		final Condition c = lock.writeLock().newCondition();
883		try {
884	<	lock.writeLock().lock();
885	<	long t = c.awaitNanos(100);
886	<	assertTrue(t <= 0);
578	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
884	>	c.signalAll();
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {}
887		}
888
889	+	/**
890	+	* awaitNanos without a signal times out
891	+	*/
892	+	public void testAwaitNanos_Timeout() throws InterruptedException {
893	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	+	final Condition c = lock.writeLock().newCondition();
895	+	lock.writeLock().lock();
896	+	long startTime = System.nanoTime();
897	+	long timeoutMillis = 10;
898	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
899	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
900	+	assertTrue(nanosRemaining <= 0);
901	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
902	+	lock.writeLock().unlock();
903	+	}
904
905		/**
906	<	*  timed await without a signal times out
906	>	* timed await without a signal times out
907		*/
908	<	public void testAwait_Timeout() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	public void testAwait_Timeout() throws InterruptedException {
909	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
910		final Condition c = lock.writeLock().newCondition();
911	<	try {
912	<	lock.writeLock().lock();
913	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
914	<	lock.writeLock().unlock();
915	<	}
916	<	catch (Exception ex) {
598	<	unexpectedException();
599	<	}
911	>	lock.writeLock().lock();
912	>	long startTime = System.nanoTime();
913	>	long timeoutMillis = 10;
914	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
915	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
916	>	lock.writeLock().unlock();
917		}
918
919		/**
920		* awaitUntil without a signal times out
921		*/
922	<	public void testAwaitUntil_Timeout() {
923	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
922	>	public void testAwaitUntil_Timeout() throws InterruptedException {
923	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
924		final Condition c = lock.writeLock().newCondition();
925	<	try {
926	<	lock.writeLock().lock();
927	<	java.util.Date d = new java.util.Date();
928	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
929	<	lock.writeLock().unlock();
930	<	}
931	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
925	>	lock.writeLock().lock();
926	>	long startTime = System.nanoTime();
927	>	long timeoutMillis = 10;
928	>	java.util.Date d = new java.util.Date();
929	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
930	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
931	>	lock.writeLock().unlock();
932		}
933
934		/**
935		* await returns when signalled
936		*/
937	<	public void testAwait() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
937	>	public void testAwait() throws InterruptedException {
938	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
939		final Condition c = lock.writeLock().newCondition();
940	<	Thread t = new Thread(new Runnable() {
941	<	public void run() {
942	<	try {
943	<	lock.writeLock().lock();
944	<	c.await();
945	<	lock.writeLock().unlock();
946	<	}
947	<	catch(InterruptedException e) {
948	<	threadUnexpectedException();
949	<	}
950	<	}
951	<	});
952	<
953	<	try {
954	<	t.start();
955	<	Thread.sleep(SHORT_DELAY_MS);
956	<	lock.writeLock().lock();
642	<	c.signal();
643	<	lock.writeLock().unlock();
644	<	t.join(SHORT_DELAY_MS);
645	<	assertFalse(t.isAlive());
646	<	}
647	<	catch (Exception ex) {
648	<	unexpectedException();
649	<	}
940	>	final CountDownLatch locked = new CountDownLatch(1);
941	>	Thread t = newStartedThread(new CheckedRunnable() {
942	>	public void realRun() throws InterruptedException {
943	>	lock.writeLock().lock();
944	>	locked.countDown();
945	>	c.await();
946	>	lock.writeLock().unlock();
947	>	}});
948	>
949	>	locked.await();
950	>	lock.writeLock().lock();
951	>	assertHasWaiters(lock, c, t);
952	>	c.signal();
953	>	assertHasNoWaiters(lock, c);
954	>	assertTrue(t.isAlive());
955	>	lock.writeLock().unlock();
956	>	awaitTermination(t);
957		}
958
959		/**
960		* awaitUninterruptibly doesn't abort on interrupt
961		*/
962	<	public void testAwaitUninterruptibly() {
963	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
962	>	public void testAwaitUninterruptibly() throws InterruptedException {
963	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
964		final Condition c = lock.writeLock().newCondition();
965	<	Thread t = new Thread(new Runnable() {
966	<	public void run() {
967	<	lock.writeLock().lock();
968	<	c.awaitUninterruptibly();
969	<	lock.writeLock().unlock();
970	<	}
971	<	});
972	<
973	<	try {
974	<	t.start();
975	<	Thread.sleep(SHORT_DELAY_MS);
976	<	t.interrupt();
977	<	lock.writeLock().lock();
978	<	c.signal();
979	<	lock.writeLock().unlock();
980	<	assert(t.isInterrupted());
981	<	t.join(SHORT_DELAY_MS);
982	<	assertFalse(t.isAlive());
983	<	}
984	<	catch (Exception ex) {
678	<	unexpectedException();
679	<	}
965	>	final CountDownLatch locked = new CountDownLatch(1);
966	>	Thread t = newStartedThread(new CheckedRunnable() {
967	>	public void realRun() {
968	>	lock.writeLock().lock();
969	>	locked.countDown();
970	>	c.awaitUninterruptibly();
971	>	assertTrue(Thread.interrupted());
972	>	lock.writeLock().unlock();
973	>	}});
974	>
975	>	locked.await();
976	>	lock.writeLock().lock();
977	>	lock.writeLock().unlock();
978	>	t.interrupt();
979	>	long timeoutMillis = 10;
980	>	assertThreadJoinTimesOut(t, timeoutMillis);
981	>	lock.writeLock().lock();
982	>	c.signal();
983	>	lock.writeLock().unlock();
984	>	awaitTermination(t);
985		}
986
987		/**
988		* await is interruptible
989		*/
990	<	public void testAwait_Interrupt() {
991	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
990	>	public void testAwait_Interrupt() throws InterruptedException {
991	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
992		final Condition c = lock.writeLock().newCondition();
993	<	Thread t = new Thread(new Runnable() {
994	<	public void run() {
995	<	try {
996	<	lock.writeLock().lock();
997	<	c.await();
998	<	lock.writeLock().unlock();
999	<	threadShouldThrow();
1000	<	}
1001	<	catch(InterruptedException success) {
1002	<	}
1003	<	}
1004	<	});
1005	<
1006	<	try {
1007	<	t.start();
1008	<	Thread.sleep(SHORT_DELAY_MS);
1009	<	t.interrupt();
1010	<	t.join(SHORT_DELAY_MS);
1011	<	assertFalse(t.isAlive());
1012	<	}
1013	<	catch (Exception ex) {
1014	<	unexpectedException();
710	<	}
993	>	final CountDownLatch locked = new CountDownLatch(1);
994	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
995	>	public void realRun() throws InterruptedException {
996	>	lock.writeLock().lock();
997	>	assertWriteLockedBy(lock, Thread.currentThread());
998	>	assertHasNoWaiters(lock, c);
999	>	locked.countDown();
1000	>	try {
1001	>	c.await();
1002	>	} finally {
1003	>	assertWriteLockedBy(lock, Thread.currentThread());
1004	>	assertHasNoWaiters(lock, c);
1005	>	lock.writeLock().unlock();
1006	>	assertFalse(Thread.interrupted());
1007	>	}
1008	>	}});
1009	>
1010	>	locked.await();
1011	>	assertHasWaiters(lock, c, t);
1012	>	t.interrupt();
1013	>	awaitTermination(t);
1014	>	assertNotWriteLocked(lock);
1015		}
1016
1017		/**
1018		* awaitNanos is interruptible
1019		*/
1020	<	public void testAwaitNanos_Interrupt() {
1021	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1020	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
1021	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1022		final Condition c = lock.writeLock().newCondition();
1023	<	Thread t = new Thread(new Runnable() {
1024	<	public void run() {
1025	<	try {
1026	<	lock.writeLock().lock();
1027	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1028	<	lock.writeLock().unlock();
1029	<	threadShouldThrow();
1030	<	}
1031	<	catch(InterruptedException success) {
1032	<	}
1033	<	}
1034	<	});
1035	<
1036	<	try {
1037	<	t.start();
1038	<	Thread.sleep(SHORT_DELAY_MS);
1039	<	t.interrupt();
1040	<	t.join(SHORT_DELAY_MS);
1041	<	assertFalse(t.isAlive());
1042	<	}
1043	<	catch (Exception ex) {
1044	<	unexpectedException();
741	<	}
1023	>	final CountDownLatch locked = new CountDownLatch(1);
1024	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1025	>	public void realRun() throws InterruptedException {
1026	>	lock.writeLock().lock();
1027	>	assertWriteLockedBy(lock, Thread.currentThread());
1028	>	assertHasNoWaiters(lock, c);
1029	>	locked.countDown();
1030	>	try {
1031	>	c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
1032	>	} finally {
1033	>	assertWriteLockedBy(lock, Thread.currentThread());
1034	>	assertHasNoWaiters(lock, c);
1035	>	lock.writeLock().unlock();
1036	>	assertFalse(Thread.interrupted());
1037	>	}
1038	>	}});
1039	>
1040	>	locked.await();
1041	>	assertHasWaiters(lock, c, t);
1042	>	t.interrupt();
1043	>	awaitTermination(t);
1044	>	assertNotWriteLocked(lock);
1045		}
1046
1047		/**
1048		* awaitUntil is interruptible
1049		*/
1050	<	public void testAwaitUntil_Interrupt() {
1051	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1050	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
1051	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1052		final Condition c = lock.writeLock().newCondition();
1053	<	Thread t = new Thread(new Runnable() {
1054	<	public void run() {
1055	<	try {
1056	<	lock.writeLock().lock();
1057	<	java.util.Date d = new java.util.Date();
1058	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1059	<	lock.writeLock().unlock();
1060	<	threadShouldThrow();
1061	<	}
1062	<	catch(InterruptedException success) {
1063	<	}
1064	<	}
1065	<	});
1066	<
1067	<	try {
1068	<	t.start();
1069	<	Thread.sleep(SHORT_DELAY_MS);
1070	<	t.interrupt();
1071	<	t.join(SHORT_DELAY_MS);
1072	<	assertFalse(t.isAlive());
1073	<	}
1074	<	catch (Exception ex) {
1075	<	unexpectedException();
773	<	}
1053	>	final CountDownLatch locked = new CountDownLatch(1);
1054	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1055	>	public void realRun() throws InterruptedException {
1056	>	lock.writeLock().lock();
1057	>	assertWriteLockedBy(lock, Thread.currentThread());
1058	>	assertHasNoWaiters(lock, c);
1059	>	locked.countDown();
1060	>	java.util.Date d = new java.util.Date();
1061	>	try {
1062	>	c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS));
1063	>	} finally {
1064	>	assertWriteLockedBy(lock, Thread.currentThread());
1065	>	assertHasNoWaiters(lock, c);
1066	>	lock.writeLock().unlock();
1067	>	assertFalse(Thread.interrupted());
1068	>	}
1069	>	}});
1070	>
1071	>	locked.await();
1072	>	assertHasWaiters(lock, c, t);
1073	>	t.interrupt();
1074	>	awaitTermination(t);
1075	>	assertNotWriteLocked(lock);
1076		}
1077
1078		/**
1079		* signalAll wakes up all threads
1080		*/
1081	<	public void testSignalAll() {
1082	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1081	>	public void testSignalAll() throws InterruptedException {
1082	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1083		final Condition c = lock.writeLock().newCondition();
1084	<	Thread t1 = new Thread(new Runnable() {
1085	<	public void run() {
1086	<	try {
1087	<	lock.writeLock().lock();
1088	<	c.await();
1089	<	lock.writeLock().unlock();
1090	<	}
1091	<	catch(InterruptedException e) {
1092	<	threadUnexpectedException();
1093	<	}
1094	<	}
1095	<	});
1096	<
1097	<	Thread t2 = new Thread(new Runnable() {
1098	<	public void run() {
1099	<	try {
1100	<	lock.writeLock().lock();
1101	<	c.await();
1102	<	lock.writeLock().unlock();
1103	<	}
1104	<	catch(InterruptedException e) {
1105	<	threadUnexpectedException();
1106	<	}
1107	<	}
1108	<	});
1084	>	final CountDownLatch locked = new CountDownLatch(2);
1085	>	final Lock writeLock = lock.writeLock();
1086	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1087	>	public void realRun() throws InterruptedException {
1088	>	writeLock.lock();
1089	>	locked.countDown();
1090	>	c.await();
1091	>	writeLock.unlock();
1092	>	}});
1093	>
1094	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1095	>	public void realRun() throws InterruptedException {
1096	>	writeLock.lock();
1097	>	locked.countDown();
1098	>	c.await();
1099	>	writeLock.unlock();
1100	>	}});
1101	>
1102	>	locked.await();
1103	>	writeLock.lock();
1104	>	assertHasWaiters(lock, c, t1, t2);
1105	>	c.signalAll();
1106	>	assertHasNoWaiters(lock, c);
1107	>	writeLock.unlock();
1108	>	awaitTermination(t1);
1109	>	awaitTermination(t2);
1110	>	}
1111
1112	<	try {
1113	<	t1.start();
1114	<	t2.start();
1115	<	Thread.sleep(SHORT_DELAY_MS);
1116	<	lock.writeLock().lock();
1117	<	c.signalAll();
1118	<	lock.writeLock().unlock();
1119	<	t1.join(SHORT_DELAY_MS);
1120	<	t2.join(SHORT_DELAY_MS);
1121	<	assertFalse(t1.isAlive());
1122	<	assertFalse(t2.isAlive());
1123	<	}
1124	<	catch (Exception ex) {
1125	<	unexpectedException();
1126	<	}
1112	>	/**
1113	>	* signal wakes up waiting threads in FIFO order.
1114	>	*/
1115	>	public void testSignalWakesFifo() throws InterruptedException {
1116	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1117	>	final Condition c = lock.writeLock().newCondition();
1118	>	final CountDownLatch locked1 = new CountDownLatch(1);
1119	>	final CountDownLatch locked2 = new CountDownLatch(1);
1120	>	final Lock writeLock = lock.writeLock();
1121	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked1.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked1.await();
1130	>
1131	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1132	>	public void realRun() throws InterruptedException {
1133	>	writeLock.lock();
1134	>	locked2.countDown();
1135	>	c.await();
1136	>	writeLock.unlock();
1137	>	}});
1138	>
1139	>	locked2.await();
1140	>
1141	>	writeLock.lock();
1142	>	assertHasWaiters(lock, c, t1, t2);
1143	>	assertFalse(lock.hasQueuedThreads());
1144	>	c.signal();
1145	>	assertHasWaiters(lock, c, t2);
1146	>	assertTrue(lock.hasQueuedThread(t1));
1147	>	assertFalse(lock.hasQueuedThread(t2));
1148	>	c.signal();
1149	>	assertHasNoWaiters(lock, c);
1150	>	assertTrue(lock.hasQueuedThread(t1));
1151	>	assertTrue(lock.hasQueuedThread(t2));
1152	>	writeLock.unlock();
1153	>	awaitTermination(t1);
1154	>	awaitTermination(t2);
1155	>	}
1156	>
1157	>	/**
1158	>	* await after multiple reentrant locking preserves lock count
1159	>	*/
1160	>	public void testAwaitLockCount() throws InterruptedException {
1161	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1162	>	final Condition c = lock.writeLock().newCondition();
1163	>	final CountDownLatch locked = new CountDownLatch(2);
1164	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1165	>	public void realRun() throws InterruptedException {
1166	>	lock.writeLock().lock();
1167	>	assertWriteLockedBy(lock, Thread.currentThread());
1168	>	assertEquals(1, lock.writeLock().getHoldCount());
1169	>	locked.countDown();
1170	>	c.await();
1171	>	assertWriteLockedBy(lock, Thread.currentThread());
1172	>	assertEquals(1, lock.writeLock().getHoldCount());
1173	>	lock.writeLock().unlock();
1174	>	}});
1175	>
1176	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1177	>	public void realRun() throws InterruptedException {
1178	>	lock.writeLock().lock();
1179	>	lock.writeLock().lock();
1180	>	assertWriteLockedBy(lock, Thread.currentThread());
1181	>	assertEquals(2, lock.writeLock().getHoldCount());
1182	>	locked.countDown();
1183	>	c.await();
1184	>	assertWriteLockedBy(lock, Thread.currentThread());
1185	>	assertEquals(2, lock.writeLock().getHoldCount());
1186	>	lock.writeLock().unlock();
1187	>	lock.writeLock().unlock();
1188	>	}});
1189	>
1190	>	locked.await();
1191	>	lock.writeLock().lock();
1192	>	assertHasWaiters(lock, c, t1, t2);
1193	>	c.signalAll();
1194	>	assertHasNoWaiters(lock, c);
1195	>	lock.writeLock().unlock();
1196	>	awaitTermination(t1);
1197	>	awaitTermination(t2);
1198		}
1199
1200		/**
1201		* A serialized lock deserializes as unlocked
1202		*/
1203	<	public void testSerialization() {
1203	>	public void testSerialization() throws Exception {
1204		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1205		l.readLock().lock();
1206		l.readLock().unlock();
1207
1208	<	try {
1209	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1210	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1211	<	out.writeObject(l);
1212	<	out.close();
1213	<
1214	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1215	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1216	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1217	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
1208	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1209	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1210	>	out.writeObject(l);
1211	>	out.close();
1212	>
1213	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1214	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1215	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1216	>	r.readLock().lock();
1217	>	r.readLock().unlock();
1218		}
1219
1220		/**
1221		* hasQueuedThreads reports whether there are waiting threads
1222		*/
1223	<	public void testhasQueuedThreads() {
1224	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223	>	public void testHasQueuedThreads() throws InterruptedException {
1224	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1225		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1226		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1227	+	assertFalse(lock.hasQueuedThreads());
1228	+	lock.writeLock().lock();
1229	+	assertFalse(lock.hasQueuedThreads());
1230	+	t1.start();
1231	+	waitForQueuedThread(lock, t1);
1232	+	assertTrue(lock.hasQueuedThreads());
1233	+	t2.start();
1234	+	waitForQueuedThread(lock, t2);
1235	+	assertTrue(lock.hasQueuedThreads());
1236	+	t1.interrupt();
1237	+	awaitTermination(t1);
1238	+	assertTrue(lock.hasQueuedThreads());
1239	+	lock.writeLock().unlock();
1240	+	awaitTermination(t2);
1241	+	assertFalse(lock.hasQueuedThreads());
1242	+	}
1243	+
1244	+	/**
1245	+	* hasQueuedThread(null) throws NPE
1246	+	*/
1247	+	public void testHasQueuedThreadNPE() {
1248	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1249		try {
1250	<	assertFalse(lock.hasQueuedThreads());
1251	<	lock.writeLock().lock();
1252	<	t1.start();
1253	<	Thread.sleep(SHORT_DELAY_MS);
1254	<	assertTrue(lock.hasQueuedThreads());
1255	<	t2.start();
1256	<	Thread.sleep(SHORT_DELAY_MS);
1257	<	assertTrue(lock.hasQueuedThreads());
1258	<	t1.interrupt();
1259	<	Thread.sleep(SHORT_DELAY_MS);
1260	<	assertTrue(lock.hasQueuedThreads());
1261	<	lock.writeLock().unlock();
1262	<	Thread.sleep(SHORT_DELAY_MS);
1263	<	assertFalse(lock.hasQueuedThreads());
1264	<	t1.join();
1265	<	t2.join();
1266	<	} catch(Exception e){
1267	<	unexpectedException();
1268	<	}
1269	<	}
1250	>	lock.hasQueuedThread(null);
1251	>	shouldThrow();
1252	>	} catch (NullPointerException success) {}
1253	>	}
1254	>
1255	>	/**
1256	>	* hasQueuedThread reports whether a thread is queued.
1257	>	*/
1258	>	public void testHasQueuedThread() throws InterruptedException {
1259	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1260	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262	>	assertFalse(lock.hasQueuedThread(t1));
1263	>	assertFalse(lock.hasQueuedThread(t2));
1264	>	lock.writeLock().lock();
1265	>	t1.start();
1266	>	waitForQueuedThread(lock, t1);
1267	>	assertTrue(lock.hasQueuedThread(t1));
1268	>	assertFalse(lock.hasQueuedThread(t2));
1269	>	t2.start();
1270	>	waitForQueuedThread(lock, t2);
1271	>	assertTrue(lock.hasQueuedThread(t1));
1272	>	assertTrue(lock.hasQueuedThread(t2));
1273	>	t1.interrupt();
1274	>	awaitTermination(t1);
1275	>	assertFalse(lock.hasQueuedThread(t1));
1276	>	assertTrue(lock.hasQueuedThread(t2));
1277	>	lock.writeLock().unlock();
1278	>	awaitTermination(t2);
1279	>	assertFalse(lock.hasQueuedThread(t1));
1280	>	assertFalse(lock.hasQueuedThread(t2));
1281	>	}
1282
1283		/**
1284		* getQueueLength reports number of waiting threads
1285		*/
1286	<	public void testGetQueueLength() {
1287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1286	>	public void testGetQueueLength() throws InterruptedException {
1287	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1288		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1289		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1290	<	try {
1291	<	assertEquals(0, lock.getQueueLength());
1292	<	lock.writeLock().lock();
1293	<	t1.start();
1294	<	Thread.sleep(SHORT_DELAY_MS);
1295	<	assertEquals(1, lock.getQueueLength());
1296	<	t2.start();
1297	<	Thread.sleep(SHORT_DELAY_MS);
1298	<	assertEquals(2, lock.getQueueLength());
1299	<	t1.interrupt();
1300	<	Thread.sleep(SHORT_DELAY_MS);
1301	<	assertEquals(1, lock.getQueueLength());
1302	<	lock.writeLock().unlock();
1303	<	Thread.sleep(SHORT_DELAY_MS);
1304	<	assertEquals(0, lock.getQueueLength());
901	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1290	>	assertEquals(0, lock.getQueueLength());
1291	>	lock.writeLock().lock();
1292	>	t1.start();
1293	>	waitForQueuedThread(lock, t1);
1294	>	assertEquals(1, lock.getQueueLength());
1295	>	t2.start();
1296	>	waitForQueuedThread(lock, t2);
1297	>	assertEquals(2, lock.getQueueLength());
1298	>	t1.interrupt();
1299	>	awaitTermination(t1);
1300	>	assertEquals(1, lock.getQueueLength());
1301	>	lock.writeLock().unlock();
1302	>	awaitTermination(t2);
1303	>	assertEquals(0, lock.getQueueLength());
1304	>	}
1305
1306		/**
1307		* getQueuedThreads includes waiting threads
1308		*/
1309	<	public void testGetQueuedThreads() {
1310	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1309	>	public void testGetQueuedThreads() throws InterruptedException {
1310	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1311		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1312		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1313	<	try {
1314	<	assertTrue(lock.getQueuedThreads().isEmpty());
1315	<	lock.writeLock().lock();
1316	<	assertTrue(lock.getQueuedThreads().isEmpty());
1317	<	t1.start();
1318	<	Thread.sleep(SHORT_DELAY_MS);
1319	<	assertTrue(lock.getQueuedThreads().contains(t1));
1320	<	t2.start();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1322	<	assertTrue(lock.getQueuedThreads().contains(t1));
1323	<	assertTrue(lock.getQueuedThreads().contains(t2));
1324	<	t1.interrupt();
1325	<	Thread.sleep(SHORT_DELAY_MS);
1326	<	assertFalse(lock.getQueuedThreads().contains(t1));
1327	<	assertTrue(lock.getQueuedThreads().contains(t2));
1328	<	lock.writeLock().unlock();
1329	<	Thread.sleep(SHORT_DELAY_MS);
1330	<	assertTrue(lock.getQueuedThreads().isEmpty());
1331	<	t1.join();
1332	<	t2.join();
1333	<	} catch(Exception e){
936	<	unexpectedException();
937	<	}
938	<	}
1313	>	assertTrue(lock.getQueuedThreads().isEmpty());
1314	>	lock.writeLock().lock();
1315	>	assertTrue(lock.getQueuedThreads().isEmpty());
1316	>	t1.start();
1317	>	waitForQueuedThread(lock, t1);
1318	>	assertEquals(1, lock.getQueuedThreads().size());
1319	>	assertTrue(lock.getQueuedThreads().contains(t1));
1320	>	t2.start();
1321	>	waitForQueuedThread(lock, t2);
1322	>	assertEquals(2, lock.getQueuedThreads().size());
1323	>	assertTrue(lock.getQueuedThreads().contains(t1));
1324	>	assertTrue(lock.getQueuedThreads().contains(t2));
1325	>	t1.interrupt();
1326	>	awaitTermination(t1);
1327	>	assertFalse(lock.getQueuedThreads().contains(t1));
1328	>	assertTrue(lock.getQueuedThreads().contains(t2));
1329	>	assertEquals(1, lock.getQueuedThreads().size());
1330	>	lock.writeLock().unlock();
1331	>	awaitTermination(t2);
1332	>	assertTrue(lock.getQueuedThreads().isEmpty());
1333	>	}
1334
1335		/**
1336		* hasWaiters throws NPE if null
1337		*/
1338		public void testHasWaitersNPE() {
1339	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1339	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1340		try {
1341		lock.hasWaiters(null);
1342		shouldThrow();
1343	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1343	>	} catch (NullPointerException success) {}
1344		}
1345
1346		/**
1347		* getWaitQueueLength throws NPE if null
1348		*/
1349		public void testGetWaitQueueLengthNPE() {
1350	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1350	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1351		try {
1352		lock.getWaitQueueLength(null);
1353		shouldThrow();
1354	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1354	>	} catch (NullPointerException success) {}
1355		}
1356
968	–
1357		/**
1358		* getWaitingThreads throws NPE if null
1359		*/
1360		public void testGetWaitingThreadsNPE() {
1361	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1361	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1362		try {
1363		lock.getWaitingThreads(null);
1364		shouldThrow();
1365	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1365	>	} catch (NullPointerException success) {}
1366		}
1367
1368		/**
1369	<	* hasWaiters throws IAE if not owned
1369	>	* hasWaiters throws IllegalArgumentException if not owned
1370		*/
1371		public void testHasWaitersIAE() {
1372	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1373	<	final Condition c = (lock.writeLock().newCondition());
1374	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1372	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1373	>	final Condition c = lock.writeLock().newCondition();
1374	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1375		try {
1376		lock2.hasWaiters(c);
1377		shouldThrow();
1378	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1378	>	} catch (IllegalArgumentException success) {}
1379		}
1380
1381		/**
1382	<	* hasWaiters throws IMSE if not locked
1382	>	* hasWaiters throws IllegalMonitorStateException if not locked
1383		*/
1384		public void testHasWaitersIMSE() {
1385	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1386	<	final Condition c = (lock.writeLock().newCondition());
1385	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1386	>	final Condition c = lock.writeLock().newCondition();
1387		try {
1388		lock.hasWaiters(c);
1389		shouldThrow();
1390	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1390	>	} catch (IllegalMonitorStateException success) {}
1391		}
1392
1014	–
1393		/**
1394	<	* getWaitQueueLength throws IAE if not owned
1394	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1395		*/
1396		public void testGetWaitQueueLengthIAE() {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	<	final Condition c = (lock.writeLock().newCondition());
1399	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1397	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	>	final Condition c = lock.writeLock().newCondition();
1399	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1400		try {
1401		lock2.getWaitQueueLength(c);
1402		shouldThrow();
1403	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1403	>	} catch (IllegalArgumentException success) {}
1404		}
1405
1406		/**
1407	<	* getWaitQueueLength throws IMSE if not locked
1407	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1408		*/
1409		public void testGetWaitQueueLengthIMSE() {
1410	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1411	<	final Condition c = (lock.writeLock().newCondition());
1410	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1411	>	final Condition c = lock.writeLock().newCondition();
1412		try {
1413		lock.getWaitQueueLength(c);
1414		shouldThrow();
1415	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1415	>	} catch (IllegalMonitorStateException success) {}
1416		}
1417
1046	–
1418		/**
1419	<	* getWaitingThreads throws IAE if not owned
1419	>	* getWaitingThreads throws IllegalArgumentException if not owned
1420		*/
1421		public void testGetWaitingThreadsIAE() {
1422	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1423	<	final Condition c = (lock.writeLock().newCondition());
1424	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1422	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1423	>	final Condition c = lock.writeLock().newCondition();
1424	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1425		try {
1426		lock2.getWaitingThreads(c);
1427		shouldThrow();
1428	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1428	>	} catch (IllegalArgumentException success) {}
1429		}
1430
1431		/**
1432	<	* getWaitingThreads throws IMSE if not locked
1432	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1433		*/
1434		public void testGetWaitingThreadsIMSE() {
1435	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1436	<	final Condition c = (lock.writeLock().newCondition());
1435	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1436	>	final Condition c = lock.writeLock().newCondition();
1437		try {
1438		lock.getWaitingThreads(c);
1439		shouldThrow();
1440	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1440	>	} catch (IllegalMonitorStateException success) {}
1441		}
1442
1078	–
1443		/**
1444		* hasWaiters returns true when a thread is waiting, else false
1445		*/
1446	<	public void testHasWaiters() {
1447	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1448	<	final Condition c = (lock.writeLock().newCondition());
1449	<	Thread t = new Thread(new Runnable() {
1450	<	public void run() {
1451	<	try {
1452	<	lock.writeLock().lock();
1453	<	threadAssertFalse(lock.hasWaiters(c));
1454	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1455	<	c.await();
1456	<	lock.writeLock().unlock();
1457	<	}
1458	<	catch(InterruptedException e) {
1459	<	threadUnexpectedException();
1460	<	}
1461	<	}
1462	<	});
1463	<
1464	<	try {
1465	<	t.start();
1466	<	Thread.sleep(SHORT_DELAY_MS);
1467	<	lock.writeLock().lock();
1468	<	assertTrue(lock.hasWaiters(c));
1469	<	assertEquals(1, lock.getWaitQueueLength(c));
1470	<	c.signal();
1471	<	lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1109	<	lock.writeLock().lock();
1110	<	assertFalse(lock.hasWaiters(c));
1111	<	assertEquals(0, lock.getWaitQueueLength(c));
1112	<	lock.writeLock().unlock();
1113	<	t.join(SHORT_DELAY_MS);
1114	<	assertFalse(t.isAlive());
1115	<	}
1116	<	catch (Exception ex) {
1117	<	unexpectedException();
1118	<	}
1446	>	public void testHasWaiters() throws InterruptedException {
1447	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1448	>	final Condition c = lock.writeLock().newCondition();
1449	>	final CountDownLatch locked = new CountDownLatch(1);
1450	>	Thread t = newStartedThread(new CheckedRunnable() {
1451	>	public void realRun() throws InterruptedException {
1452	>	lock.writeLock().lock();
1453	>	assertHasNoWaiters(lock, c);
1454	>	assertFalse(lock.hasWaiters(c));
1455	>	locked.countDown();
1456	>	c.await();
1457	>	assertHasNoWaiters(lock, c);
1458	>	assertFalse(lock.hasWaiters(c));
1459	>	lock.writeLock().unlock();
1460	>	}});
1461	>
1462	>	locked.await();
1463	>	lock.writeLock().lock();
1464	>	assertHasWaiters(lock, c, t);
1465	>	assertTrue(lock.hasWaiters(c));
1466	>	c.signal();
1467	>	assertHasNoWaiters(lock, c);
1468	>	assertFalse(lock.hasWaiters(c));
1469	>	lock.writeLock().unlock();
1470	>	awaitTermination(t);
1471	>	assertHasNoWaiters(lock, c);
1472		}
1473
1474		/**
1475		* getWaitQueueLength returns number of waiting threads
1476		*/
1477	<	public void testGetWaitQueueLength() {
1478	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1479	<	final Condition c = (lock.writeLock().newCondition());
1480	<	Thread t = new Thread(new Runnable() {
1481	<	public void run() {
1482	<	try {
1483	<	lock.writeLock().lock();
1484	<	threadAssertFalse(lock.hasWaiters(c));
1485	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1486	<	c.await();
1487	<	lock.writeLock().unlock();
1488	<	}
1489	<	catch(InterruptedException e) {
1490	<	threadUnexpectedException();
1491	<	}
1492	<	}
1493	<	});
1494	<
1495	<	try {
1496	<	t.start();
1497	<	Thread.sleep(SHORT_DELAY_MS);
1498	<	lock.writeLock().lock();
1146	<	assertTrue(lock.hasWaiters(c));
1147	<	assertEquals(1, lock.getWaitQueueLength(c));
1148	<	c.signal();
1149	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
1477	>	public void testGetWaitQueueLength() throws InterruptedException {
1478	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1479	>	final Condition c = lock.writeLock().newCondition();
1480	>	final CountDownLatch locked = new CountDownLatch(1);
1481	>	Thread t = newStartedThread(new CheckedRunnable() {
1482	>	public void realRun() throws InterruptedException {
1483	>	lock.writeLock().lock();
1484	>	assertEquals(0, lock.getWaitQueueLength(c));
1485	>	locked.countDown();
1486	>	c.await();
1487	>	lock.writeLock().unlock();
1488	>	}});
1489	>
1490	>	locked.await();
1491	>	lock.writeLock().lock();
1492	>	assertHasWaiters(lock, c, t);
1493	>	assertEquals(1, lock.getWaitQueueLength(c));
1494	>	c.signal();
1495	>	assertHasNoWaiters(lock, c);
1496	>	assertEquals(0, lock.getWaitQueueLength(c));
1497	>	lock.writeLock().unlock();
1498	>	awaitTermination(t);
1499		}
1500
1163	–
1501		/**
1502		* getWaitingThreads returns only and all waiting threads
1503		*/
1504	<	public void testGetWaitingThreads() {
1505	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1504	>	public void testGetWaitingThreads() throws InterruptedException {
1505	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1506		final Condition c = lock.writeLock().newCondition();
1507	<	Thread t1 = new Thread(new Runnable() {
1508	<	public void run() {
1509	<	try {
1510	<	lock.writeLock().lock();
1511	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1512	<	c.await();
1513	<	lock.writeLock().unlock();
1514	<	}
1515	<	catch(InterruptedException e) {
1516	<	threadUnexpectedException();
1517	<	}
1518	<	}
1519	<	});
1520	<
1521	<	Thread t2 = new Thread(new Runnable() {
1522	<	public void run() {
1523	<	try {
1524	<	lock.writeLock().lock();
1525	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1526	<	c.await();
1527	<	lock.writeLock().unlock();
1528	<	}
1529	<	catch(InterruptedException e) {
1530	<	threadUnexpectedException();
1531	<	}
1532	<	}
1533	<	});
1534	<
1535	<	try {
1536	<	lock.writeLock().lock();
1537	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1538	<	lock.writeLock().unlock();
1539	<	t1.start();
1540	<	Thread.sleep(SHORT_DELAY_MS);
1541	<	t2.start();
1542	<	Thread.sleep(SHORT_DELAY_MS);
1543	<	lock.writeLock().lock();
1544	<	assertTrue(lock.hasWaiters(c));
1545	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1546	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1547	<	c.signalAll();
1548	<	lock.writeLock().unlock();
1549	<	Thread.sleep(SHORT_DELAY_MS);
1550	<	lock.writeLock().lock();
1551	<	assertFalse(lock.hasWaiters(c));
1552	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1553	<	lock.writeLock().unlock();
1554	<	t1.join(SHORT_DELAY_MS);
1555	<	t2.join(SHORT_DELAY_MS);
1556	<	assertFalse(t1.isAlive());
1557	<	assertFalse(t2.isAlive());
1558	<	}
1559	<	catch (Exception ex) {
1560	<	unexpectedException();
1561	<	}
1507	>	final CountDownLatch locked1 = new CountDownLatch(1);
1508	>	final CountDownLatch locked2 = new CountDownLatch(1);
1509	>	Thread t1 = new Thread(new CheckedRunnable() {
1510	>	public void realRun() throws InterruptedException {
1511	>	lock.writeLock().lock();
1512	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1513	>	locked1.countDown();
1514	>	c.await();
1515	>	lock.writeLock().unlock();
1516	>	}});
1517	>
1518	>	Thread t2 = new Thread(new CheckedRunnable() {
1519	>	public void realRun() throws InterruptedException {
1520	>	lock.writeLock().lock();
1521	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1522	>	locked2.countDown();
1523	>	c.await();
1524	>	lock.writeLock().unlock();
1525	>	}});
1526	>
1527	>	lock.writeLock().lock();
1528	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1529	>	lock.writeLock().unlock();
1530	>
1531	>	t1.start();
1532	>	locked1.await();
1533	>	t2.start();
1534	>	locked2.await();
1535	>
1536	>	lock.writeLock().lock();
1537	>	assertTrue(lock.hasWaiters(c));
1538	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1539	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1540	>	assertEquals(2, lock.getWaitingThreads(c).size());
1541	>	c.signalAll();
1542	>	assertHasNoWaiters(lock, c);
1543	>	lock.writeLock().unlock();
1544	>
1545	>	awaitTermination(t1);
1546	>	awaitTermination(t2);
1547	>
1548	>	assertHasNoWaiters(lock, c);
1549	>	}
1550	>
1551	>	/**
1552	>	* toString indicates current lock state
1553	>	*/
1554	>	public void testToString() {
1555	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1556	>	String us = lock.toString();
1557	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1558	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1559	>	lock.writeLock().lock();
1560	>	String ws = lock.toString();
1561	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1562	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1563	>	lock.writeLock().unlock();
1564	>	lock.readLock().lock();
1565	>	lock.readLock().lock();
1566	>	String rs = lock.toString();
1567	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1568	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1569	>	}
1570	>
1571	>	/**
1572	>	* readLock.toString indicates current lock state
1573	>	*/
1574	>	public void testReadLockToString() {
1575	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1576	>	String us = lock.readLock().toString();
1577	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1578	>	lock.readLock().lock();
1579	>	lock.readLock().lock();
1580	>	String rs = lock.readLock().toString();
1581	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1582	>	}
1583	>
1584	>	/**
1585	>	* writeLock.toString indicates current lock state
1586	>	*/
1587	>	public void testWriteLockToString() {
1588	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1589	>	String us = lock.writeLock().toString();
1590	>	assertTrue(us.indexOf("Unlocked") >= 0);
1591	>	lock.writeLock().lock();
1592	>	String ls = lock.writeLock().toString();
1593	>	assertTrue(ls.indexOf("Locked") >= 0);
1594		}
1595
1596		}

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