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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.7 by dl, Thu Dec 4 20:54:46 2003 UTC vs.
Revision 1.36 by jsr166, Sat Nov 21 02:33:20 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.util.*;
15
16		public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run (suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantReadWriteLock lock;
29		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	<	public void run() {
31	<	try {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 37 | Line 37 | public class ReentrantReadWriteLockTest
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 53 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
58	<	}
59	<	public PublicCondition newCondition() {
60	<	return new PublicCondition(this);
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<
57	<	static class PublicCondition extends AbstractReentrantLock.ConditionObject {
64	<	PublicCondition(PublicReentrantReadWriteLock l) { super(l); }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
69	–
59		}
60
61		/**
62		* Constructor sets given fairness, and is in unlocked state
63		*/
64	<	public void testConstructor() {
65	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
64	>	public void testConstructor() {
65	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
66		assertFalse(rl.isFair());
67		assertFalse(rl.isWriteLocked());
68	<	assertEquals(0, rl.getReadLocks());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
68	>	assertEquals(0, rl.getReadLockCount());
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
72	<	assertEquals(0, r2.getReadLocks());
72	>	assertEquals(0, r2.getReadLockCount());
73	>	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	>	assertFalse(r3.isFair());
75	>	assertFalse(r3.isWriteLocked());
76	>	assertEquals(0, r3.getReadLockCount());
77		}
78
79		/**
80		* write-locking and read-locking an unlocked lock succeed
81		*/
82	<	public void testLock() {
83	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	>	public void testLock() {
83	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84		rl.writeLock().lock();
85		assertTrue(rl.isWriteLocked());
86		assertTrue(rl.isWriteLockedByCurrentThread());
87	<	assertEquals(0, rl.getReadLocks());
87	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
88	>	assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertEquals(0, rl.getReadLocks());
92	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	>	assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
96		assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLocks());
97	>	assertEquals(1, rl.getReadLockCount());
98		rl.readLock().unlock();
99		assertFalse(rl.isWriteLocked());
100		assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLocks());
101	>	assertEquals(0, rl.getReadLockCount());
102		}
103
104
105		/**
106		* locking an unlocked fair lock succeeds
107		*/
108	<	public void testFairLock() {
109	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	>	public void testFairLock() {
109	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
110		rl.writeLock().lock();
111		assertTrue(rl.isWriteLocked());
112		assertTrue(rl.isWriteLockedByCurrentThread());
113	<	assertEquals(0, rl.getReadLocks());
113	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
114	>	assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	<	assertEquals(0, rl.getReadLocks());
118	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
119	>	assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
122		assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(1, rl.getReadLocks());
123	>	assertEquals(1, rl.getReadLockCount());
124		rl.readLock().unlock();
125		assertFalse(rl.isWriteLocked());
126		assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(0, rl.getReadLocks());
127	>	assertEquals(0, rl.getReadLockCount());
128		}
129
130		/**
131		* getWriteHoldCount returns number of recursive holds
132		*/
133	+	public void testGetWriteHoldCount() {
134	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	+	for (int i = 1; i <= SIZE; i++) {
136	+	lock.writeLock().lock();
137	+	assertEquals(i,lock.getWriteHoldCount());
138	+	}
139	+	for (int i = SIZE; i > 0; i--) {
140	+	lock.writeLock().unlock();
141	+	assertEquals(i-1,lock.getWriteHoldCount());
142	+	}
143	+	}
144	+
145	+	/**
146	+	* WriteLock.getHoldCount returns number of recursive holds
147	+	*/
148		public void testGetHoldCount() {
149	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	for(int i = 1; i <= SIZE; i++) {
151	<	lock.writeLock().lock();
152	<	assertEquals(i,lock.getWriteHoldCount());
153	<	}
154	<	for(int i = SIZE; i > 0; i--) {
155	<	lock.writeLock().unlock();
156	<	assertEquals(i-1,lock.getWriteHoldCount());
157	<	}
149	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	>	for (int i = 1; i <= SIZE; i++) {
151	>	lock.writeLock().lock();
152	>	assertEquals(i,lock.writeLock().getHoldCount());
153	>	}
154	>	for (int i = SIZE; i > 0; i--) {
155	>	lock.writeLock().unlock();
156	>	assertEquals(i-1,lock.writeLock().getHoldCount());
157	>	}
158		}
147	–
159
160		/**
161	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
161	>	* getReadHoldCount returns number of recursive holds
162		*/
163	<	public void testUnlock_IllegalMonitorStateException() {
164	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
165	<	try {
166	<	rl.writeLock().unlock();
167	<	shouldThrow();
168	<	} catch(IllegalMonitorStateException success){}
163	>	public void testGetReadHoldCount() {
164	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	>	for (int i = 1; i <= SIZE; i++) {
166	>	lock.readLock().lock();
167	>	assertEquals(i,lock.getReadHoldCount());
168	>	}
169	>	for (int i = SIZE; i > 0; i--) {
170	>	lock.readLock().unlock();
171	>	assertEquals(i-1,lock.getReadHoldCount());
172	>	}
173		}
174
175
176		/**
177	<	* write-lockInterruptibly is interruptible
177	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testWriteLockInterruptibly_Interrupted() {
180	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
166	<	lock.writeLock().lock();
167	<	Thread t = new Thread(new Runnable() {
168	<	public void run() {
169	<	try {
170	<	lock.writeLock().lockInterruptibly();
171	<	threadShouldThrow();
172	<	} catch(InterruptedException success){}
173	<	}
174	<	});
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181		try {
182	<	t.start();
183	<	t.interrupt();
184	<	lock.writeLock().unlock();
185	<	t.join();
186	<	} catch(Exception e){
181	<	unexpectedException();
182	<	}
183	<	}
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185	>	}
186	>
187
188		/**
189	<	* timed write-trylock is interruptible
189	>	* write-lockInterruptibly is interruptible
190		*/
191	<	public void testWriteTryLock_Interrupted() {
192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	<	lock.writeLock().lock();
194	<	Thread t = new Thread(new Runnable() {
195	<	public void run() {
196	<	try {
197	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
198	<	threadShouldThrow();
199	<	} catch(InterruptedException success){}
200	<	}
201	<	});
202	<	try {
203	<	t.start();
204	<	t.interrupt();
205	<	lock.writeLock().unlock();
206	<	t.join();
207	<	} catch(Exception e){
208	<	unexpectedException();
209	<	}
191	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
192	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
194	>	public void realRun() throws InterruptedException {
195	>	lock.writeLock().lockInterruptibly();
196	>	lock.writeLock().unlock();
197	>	lock.writeLock().lockInterruptibly();
198	>	lock.writeLock().unlock();
199	>	}});
200	>
201	>	lock.writeLock().lock();
202	>	t.start();
203	>	Thread.sleep(SHORT_DELAY_MS);
204	>	t.interrupt();
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	lock.writeLock().unlock();
207	>	t.join();
208	>	}
209	>
210	>	/**
211	>	* timed write-tryLock is interruptible
212	>	*/
213	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
214	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	>	lock.writeLock().lock();
216	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
217	>	public void realRun() throws InterruptedException {
218	>	lock.writeLock().tryLock(1000,MILLISECONDS);
219	>	}});
220	>
221	>	t.start();
222	>	t.interrupt();
223	>	lock.writeLock().unlock();
224	>	t.join();
225		}
226
227		/**
228		* read-lockInterruptibly is interruptible
229		*/
230	<	public void testReadLockInterruptibly_Interrupted() {
231	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	<	lock.writeLock().lock();
233	<	Thread t = new Thread(new Runnable() {
234	<	public void run() {
235	<	try {
236	<	lock.readLock().lockInterruptibly();
237	<	threadShouldThrow();
238	<	} catch(InterruptedException success){}
239	<	}
240	<	});
241	<	try {
242	<	t.start();
243	<	t.interrupt();
244	<	lock.writeLock().unlock();
227	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
230	<	}
231	<	}
230	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
231	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	>	lock.writeLock().lock();
233	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
234	>	public void realRun() throws InterruptedException {
235	>	lock.readLock().lockInterruptibly();
236	>	}});
237	>
238	>	t.start();
239	>	Thread.sleep(SHORT_DELAY_MS);
240	>	t.interrupt();
241	>	Thread.sleep(SHORT_DELAY_MS);
242	>	lock.writeLock().unlock();
243	>	t.join();
244	>	}
245
246		/**
247	<	* timed read-trylock is interruptible
247	>	* timed read-tryLock is interruptible
248		*/
249	<	public void testReadTryLock_Interrupted() {
250	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	<	lock.writeLock().lock();
252	<	Thread t = new Thread(new Runnable() {
253	<	public void run() {
254	<	try {
255	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
256	<	threadShouldThrow();
257	<	} catch(InterruptedException success){}
258	<	}
259	<	});
247	<	try {
248	<	t.start();
249	<	t.interrupt();
250	<	t.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
253	<	}
249	>	public void testReadTryLock_Interrupted() throws InterruptedException {
250	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	>	lock.writeLock().lock();
252	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
253	>	public void realRun() throws InterruptedException {
254	>	lock.readLock().tryLock(1000,MILLISECONDS);
255	>	}});
256	>
257	>	t.start();
258	>	t.interrupt();
259	>	t.join();
260		}
261
262	<
262	>
263		/**
264	<	* write-trylock fails if locked
264	>	* write-tryLock fails if locked
265		*/
266	<	public void testWriteTryLockWhenLocked() {
267	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
268	<	lock.writeLock().lock();
269	<	Thread t = new Thread(new Runnable() {
266	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
267	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
268	>	lock.writeLock().lock();
269	>	Thread t = new Thread(new Runnable() {
270		public void run() {
271		threadAssertFalse(lock.writeLock().tryLock());
272	<	}
273	<	});
274	<	try {
275	<	t.start();
276	<	t.join();
277	<	lock.writeLock().unlock();
278	<	} catch(Exception e){
273	<	unexpectedException();
274	<	}
275	<	}
272	>	}
273	>	});
274	>
275	>	t.start();
276	>	t.join();
277	>	lock.writeLock().unlock();
278	>	}
279
280		/**
281	<	* read-trylock fails if locked
281	>	* read-tryLock fails if locked
282		*/
283	<	public void testReadTryLockWhenLocked() {
284	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	<	lock.writeLock().lock();
286	<	Thread t = new Thread(new Runnable() {
283	>	public void testReadTryLockWhenLocked() throws InterruptedException {
284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	>	lock.writeLock().lock();
286	>	Thread t = new Thread(new Runnable() {
287		public void run() {
288		threadAssertFalse(lock.readLock().tryLock());
289	<	}
290	<	});
291	<	try {
292	<	t.start();
293	<	t.join();
294	<	lock.writeLock().unlock();
295	<	} catch(Exception e){
293	<	unexpectedException();
294	<	}
295	<	}
289	>	}
290	>	});
291	>
292	>	t.start();
293	>	t.join();
294	>	lock.writeLock().unlock();
295	>	}
296
297		/**
298		* Multiple threads can hold a read lock when not write-locked
299		*/
300	<	public void testMultipleReadLocks() {
301	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302	<	lock.readLock().lock();
303	<	Thread t = new Thread(new Runnable() {
300	>	public void testMultipleReadLocks() throws InterruptedException {
301	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302	>	lock.readLock().lock();
303	>	Thread t = new Thread(new Runnable() {
304		public void run() {
305		threadAssertTrue(lock.readLock().tryLock());
306		lock.readLock().unlock();
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	t.join();
312	<	lock.readLock().unlock();
313	<	} catch(Exception e){
314	<	unexpectedException();
315	<	}
316	<	}
307	>	}
308	>	});
309	>
310	>	t.start();
311	>	t.join();
312	>	lock.readLock().unlock();
313	>	}
314
315		/**
316		* A writelock succeeds after reading threads unlock
317		*/
318	<	public void testWriteAfterMultipleReadLocks() {
319	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	<	lock.readLock().lock();
321	<	Thread t1 = new Thread(new Runnable() {
318	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
319	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	>	lock.readLock().lock();
321	>	Thread t1 = new Thread(new Runnable() {
322		public void run() {
323		lock.readLock().lock();
324		lock.readLock().unlock();
325	<	}
326	<	});
327	<	Thread t2 = new Thread(new Runnable() {
325	>	}
326	>	});
327	>	Thread t2 = new Thread(new Runnable() {
328		public void run() {
329		lock.writeLock().lock();
330		lock.writeLock().unlock();
331	<	}
332	<	});
331	>	}
332	>	});
333
334	<	try {
335	<	t1.start();
336	<	t2.start();
337	<	Thread.sleep(SHORT_DELAY_MS);
338	<	lock.readLock().unlock();
339	<	t1.join(MEDIUM_DELAY_MS);
340	<	t2.join(MEDIUM_DELAY_MS);
341	<	assertTrue(!t1.isAlive());
342	<	assertTrue(!t2.isAlive());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
334	>	t1.start();
335	>	t2.start();
336	>	Thread.sleep(SHORT_DELAY_MS);
337	>	lock.readLock().unlock();
338	>	t1.join(MEDIUM_DELAY_MS);
339	>	t2.join(MEDIUM_DELAY_MS);
340	>	assertTrue(!t1.isAlive());
341	>	assertTrue(!t2.isAlive());
342	>	}
343
344		/**
345		* Readlocks succeed after a writing thread unlocks
346		*/
347	<	public void testReadAfterWriteLock() {
348	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
349	<	lock.writeLock().lock();
350	<	Thread t1 = new Thread(new Runnable() {
347	>	public void testReadAfterWriteLock() throws InterruptedException {
348	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
349	>	lock.writeLock().lock();
350	>	Thread t1 = new Thread(new Runnable() {
351		public void run() {
352		lock.readLock().lock();
353		lock.readLock().unlock();
354	<	}
355	<	});
356	<	Thread t2 = new Thread(new Runnable() {
354	>	}
355	>	});
356	>	Thread t2 = new Thread(new Runnable() {
357		public void run() {
358		lock.readLock().lock();
359		lock.readLock().unlock();
360	<	}
361	<	});
360	>	}
361	>	});
362
363	<	try {
364	<	t1.start();
365	<	t2.start();
366	<	Thread.sleep(SHORT_DELAY_MS);
367	<	lock.writeLock().unlock();
368	<	t1.join(MEDIUM_DELAY_MS);
369	<	t2.join(MEDIUM_DELAY_MS);
370	<	assertTrue(!t1.isAlive());
371	<	assertTrue(!t2.isAlive());
372	<
373	<	} catch(Exception e){
374	<	unexpectedException();
375	<	}
376	<	}
363	>	t1.start();
364	>	t2.start();
365	>	Thread.sleep(SHORT_DELAY_MS);
366	>	lock.writeLock().unlock();
367	>	t1.join(MEDIUM_DELAY_MS);
368	>	t2.join(MEDIUM_DELAY_MS);
369	>	assertTrue(!t1.isAlive());
370	>	assertTrue(!t2.isAlive());
371	>	}
372	>
373	>	/**
374	>	* Read trylock succeeds if write locked by current thread
375	>	*/
376	>	public void testReadHoldingWriteLock() {
377	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
378	>	lock.writeLock().lock();
379	>	assertTrue(lock.readLock().tryLock());
380	>	lock.readLock().unlock();
381	>	lock.writeLock().unlock();
382	>	}
383	>
384	>	/**
385	>	* Read lock succeeds if write locked by current thread even if
386	>	* other threads are waiting for readlock
387	>	*/
388	>	public void testReadHoldingWriteLock2() throws InterruptedException {
389	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
390	>	lock.writeLock().lock();
391	>	Thread t1 = new Thread(new Runnable() {
392	>	public void run() {
393	>	lock.readLock().lock();
394	>	lock.readLock().unlock();
395	>	}
396	>	});
397	>	Thread t2 = new Thread(new Runnable() {
398	>	public void run() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}
402	>	});
403	>
404	>	t1.start();
405	>	t2.start();
406	>	lock.readLock().lock();
407	>	lock.readLock().unlock();
408	>	Thread.sleep(SHORT_DELAY_MS);
409	>	lock.readLock().lock();
410	>	lock.readLock().unlock();
411	>	lock.writeLock().unlock();
412	>	t1.join(MEDIUM_DELAY_MS);
413	>	t2.join(MEDIUM_DELAY_MS);
414	>	assertTrue(!t1.isAlive());
415	>	assertTrue(!t2.isAlive());
416	>	}
417	>
418	>	/**
419	>	*  Read lock succeeds if write locked by current thread even if
420	>	* other threads are waiting for writelock
421	>	*/
422	>	public void testReadHoldingWriteLock3() throws InterruptedException {
423	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
424	>	lock.writeLock().lock();
425	>	Thread t1 = new Thread(new Runnable() {
426	>	public void run() {
427	>	lock.writeLock().lock();
428	>	lock.writeLock().unlock();
429	>	}
430	>	});
431	>	Thread t2 = new Thread(new Runnable() {
432	>	public void run() {
433	>	lock.writeLock().lock();
434	>	lock.writeLock().unlock();
435	>	}
436	>	});
437	>
438	>	t1.start();
439	>	t2.start();
440	>	lock.readLock().lock();
441	>	lock.readLock().unlock();
442	>	Thread.sleep(SHORT_DELAY_MS);
443	>	lock.readLock().lock();
444	>	lock.readLock().unlock();
445	>	lock.writeLock().unlock();
446	>	t1.join(MEDIUM_DELAY_MS);
447	>	t2.join(MEDIUM_DELAY_MS);
448	>	assertTrue(!t1.isAlive());
449	>	assertTrue(!t2.isAlive());
450	>	}
451
452
453		/**
454	<	* Read trylock succeeds if readlocked but not writelocked
454	>	*  Write lock succeeds if write locked by current thread even if
455	>	* other threads are waiting for writelock
456	>	*/
457	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	>	lock.writeLock().lock();
460	>	Thread t1 = new Thread(new Runnable() {
461	>	public void run() {
462	>	lock.writeLock().lock();
463	>	lock.writeLock().unlock();
464	>	}
465	>	});
466	>	Thread t2 = new Thread(new Runnable() {
467	>	public void run() {
468	>	lock.writeLock().lock();
469	>	lock.writeLock().unlock();
470	>	}
471	>	});
472	>
473	>	t1.start();
474	>	t2.start();
475	>	lock.writeLock().lock();
476	>	lock.writeLock().unlock();
477	>	Thread.sleep(SHORT_DELAY_MS);
478	>	lock.writeLock().lock();
479	>	lock.writeLock().unlock();
480	>	lock.writeLock().unlock();
481	>	t1.join(MEDIUM_DELAY_MS);
482	>	t2.join(MEDIUM_DELAY_MS);
483	>	assertTrue(!t1.isAlive());
484	>	assertTrue(!t2.isAlive());
485	>	}
486	>
487	>
488	>	/**
489	>	* Fair Read trylock succeeds if write locked by current thread
490		*/
491	<	public void testTryLockWhenReadLocked() {
492	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
493	<	lock.readLock().lock();
494	<	Thread t = new Thread(new Runnable() {
491	>	public void testReadHoldingWriteLockFair() {
492	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
493	>	lock.writeLock().lock();
494	>	assertTrue(lock.readLock().tryLock());
495	>	lock.readLock().unlock();
496	>	lock.writeLock().unlock();
497	>	}
498	>
499	>	/**
500	>	* Fair Read lock succeeds if write locked by current thread even if
501	>	* other threads are waiting for readlock
502	>	*/
503	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
504	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
505	>	lock.writeLock().lock();
506	>	Thread t1 = new Thread(new Runnable() {
507	>	public void run() {
508	>	lock.readLock().lock();
509	>	lock.readLock().unlock();
510	>	}
511	>	});
512	>	Thread t2 = new Thread(new Runnable() {
513	>	public void run() {
514	>	lock.readLock().lock();
515	>	lock.readLock().unlock();
516	>	}
517	>	});
518	>
519	>	t1.start();
520	>	t2.start();
521	>	lock.readLock().lock();
522	>	lock.readLock().unlock();
523	>	Thread.sleep(SHORT_DELAY_MS);
524	>	lock.readLock().lock();
525	>	lock.readLock().unlock();
526	>	lock.writeLock().unlock();
527	>	t1.join(MEDIUM_DELAY_MS);
528	>	t2.join(MEDIUM_DELAY_MS);
529	>	assertTrue(!t1.isAlive());
530	>	assertTrue(!t2.isAlive());
531	>	}
532	>
533	>
534	>	/**
535	>	* Fair Read lock succeeds if write locked by current thread even if
536	>	* other threads are waiting for writelock
537	>	*/
538	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
539	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
540	>	lock.writeLock().lock();
541	>	Thread t1 = new Thread(new Runnable() {
542	>	public void run() {
543	>	lock.writeLock().lock();
544	>	lock.writeLock().unlock();
545	>	}
546	>	});
547	>	Thread t2 = new Thread(new Runnable() {
548	>	public void run() {
549	>	lock.writeLock().lock();
550	>	lock.writeLock().unlock();
551	>	}
552	>	});
553	>
554	>	t1.start();
555	>	t2.start();
556	>	lock.readLock().lock();
557	>	lock.readLock().unlock();
558	>	Thread.sleep(SHORT_DELAY_MS);
559	>	lock.readLock().lock();
560	>	lock.readLock().unlock();
561	>	lock.writeLock().unlock();
562	>	t1.join(MEDIUM_DELAY_MS);
563	>	t2.join(MEDIUM_DELAY_MS);
564	>	assertTrue(!t1.isAlive());
565	>	assertTrue(!t2.isAlive());
566	>	}
567	>
568	>
569	>	/**
570	>	* Fair Write lock succeeds if write locked by current thread even if
571	>	* other threads are waiting for writelock
572	>	*/
573	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
574	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
575	>	lock.writeLock().lock();
576	>	Thread t1 = new Thread(new Runnable() {
577	>	public void run() {
578	>	lock.writeLock().lock();
579	>	lock.writeLock().unlock();
580	>	}
581	>	});
582	>	Thread t2 = new Thread(new Runnable() {
583	>	public void run() {
584	>	lock.writeLock().lock();
585	>	lock.writeLock().unlock();
586	>	}
587	>	});
588	>
589	>	t1.start();
590	>	t2.start();
591	>	Thread.sleep(SHORT_DELAY_MS);
592	>	assertTrue(lock.isWriteLockedByCurrentThread());
593	>	assertTrue(lock.getWriteHoldCount() == 1);
594	>	lock.writeLock().lock();
595	>	assertTrue(lock.getWriteHoldCount() == 2);
596	>	lock.writeLock().unlock();
597	>	lock.writeLock().lock();
598	>	lock.writeLock().unlock();
599	>	lock.writeLock().unlock();
600	>	t1.join(MEDIUM_DELAY_MS);
601	>	t2.join(MEDIUM_DELAY_MS);
602	>	assertTrue(!t1.isAlive());
603	>	assertTrue(!t2.isAlive());
604	>	}
605	>
606	>
607	>	/**
608	>	* Read tryLock succeeds if readlocked but not writelocked
609	>	*/
610	>	public void testTryLockWhenReadLocked() throws InterruptedException {
611	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
612	>	lock.readLock().lock();
613	>	Thread t = new Thread(new Runnable() {
614		public void run() {
615		threadAssertTrue(lock.readLock().tryLock());
616		lock.readLock().unlock();
617	<	}
618	<	});
619	<	try {
620	<	t.start();
621	<	t.join();
622	<	lock.readLock().unlock();
623	<	} catch(Exception e){
624	<	unexpectedException();
405	<	}
406	<	}
617	>	}
618	>	});
619	>
620	>	t.start();
621	>	t.join();
622	>	lock.readLock().unlock();
623	>	}
624	>
625
408	–
626
627		/**
628	<	* write trylock fails when readlocked
628	>	* write tryLock fails when readlocked
629		*/
630	<	public void testWriteTryLockWhenReadLocked() {
631	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
632	<	lock.readLock().lock();
633	<	Thread t = new Thread(new Runnable() {
630	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
631	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
632	>	lock.readLock().lock();
633	>	Thread t = new Thread(new Runnable() {
634		public void run() {
635		threadAssertFalse(lock.writeLock().tryLock());
636	<	}
637	<	});
638	<	try {
639	<	t.start();
640	<	t.join();
641	<	lock.readLock().unlock();
642	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
636	>	}
637	>	});
638	>
639	>	t.start();
640	>	t.join();
641	>	lock.readLock().unlock();
642	>	}
643
430	–
644
645		/**
646	<	* write timed trylock times out if locked
646	>	* Fair Read tryLock succeeds if readlocked but not writelocked
647		*/
648	<	public void testWriteTryLock_Timeout() {
649	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
650	<	lock.writeLock().lock();
651	<	Thread t = new Thread(new Runnable() {
648	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
649	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
650	>	lock.readLock().lock();
651	>	Thread t = new Thread(new Runnable() {
652		public void run() {
653	<	try {
654	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
655	<	} catch (Exception ex) {
656	<	threadUnexpectedException();
657	<	}
658	<	}
659	<	});
660	<	try {
661	<	t.start();
662	<	t.join();
663	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
653	>	threadAssertTrue(lock.readLock().tryLock());
654	>	lock.readLock().unlock();
655	>	}
656	>	});
657	>
658	>	t.start();
659	>	t.join();
660	>	lock.readLock().unlock();
661	>	}
662	>
663	>
664
665		/**
666	<	* read timed trylock times out if write-locked
666	>	* Fair write tryLock fails when readlocked
667		*/
668	<	public void testReadTryLock_Timeout() {
669	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
670	<	lock.writeLock().lock();
671	<	Thread t = new Thread(new Runnable() {
672	<	public void run() {
673	<	try {
674	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
675	<	} catch (Exception ex) {
676	<	threadUnexpectedException();
677	<	}
678	<	}
679	<	});
680	<	try {
681	<	t.start();
682	<	t.join();
683	<	lock.writeLock().unlock();
684	<	} catch(Exception e){
685	<	unexpectedException();
686	<	}
687	<	}
668	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
669	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
670	>	lock.readLock().lock();
671	>	Thread t = new Thread(new Runnable() {
672	>	public void run() {
673	>	threadAssertFalse(lock.writeLock().tryLock());
674	>	}
675	>	});
676	>
677	>	t.start();
678	>	t.join();
679	>	lock.readLock().unlock();
680	>	}
681	>
682	>
683	>
684	>	/**
685	>	* write timed tryLock times out if locked
686	>	*/
687	>	public void testWriteTryLock_Timeout() throws InterruptedException {
688	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	>	lock.writeLock().lock();
690	>	Thread t = new Thread(new CheckedRunnable() {
691	>	public void realRun() throws InterruptedException {
692	>	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693	>	}});
694	>
695	>	t.start();
696	>	t.join();
697	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
698	>	lock.writeLock().unlock();
699	>	}
700	>
701	>	/**
702	>	* read timed tryLock times out if write-locked
703	>	*/
704	>	public void testReadTryLock_Timeout() throws InterruptedException {
705	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
706	>	lock.writeLock().lock();
707	>	Thread t = new Thread(new CheckedRunnable() {
708	>	public void realRun() throws InterruptedException {
709	>	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
710	>	}});
711	>
712	>	t.start();
713	>	t.join();
714	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
715	>	lock.writeLock().unlock();
716	>	}
717
718
719		/**
720		* write lockInterruptibly succeeds if lock free else is interruptible
721		*/
722	<	public void testWriteLockInterruptibly() {
723	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
724	<	try {
725	<	lock.writeLock().lockInterruptibly();
726	<	} catch(Exception e) {
727	<	unexpectedException();
728	<	}
729	<	Thread t = new Thread(new Runnable() {
730	<	public void run() {
731	<	try {
732	<	lock.writeLock().lockInterruptibly();
733	<	threadShouldThrow();
734	<	}
735	<	catch(InterruptedException success) {
498	<	}
499	<	}
500	<	});
501	<	try {
502	<	t.start();
503	<	t.interrupt();
504	<	t.join();
505	<	lock.writeLock().unlock();
506	<	} catch(Exception e){
507	<	unexpectedException();
508	<	}
722	>	public void testWriteLockInterruptibly() throws InterruptedException {
723	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
724	>	lock.writeLock().lockInterruptibly();
725	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
726	>	public void realRun() throws InterruptedException {
727	>	lock.writeLock().lockInterruptibly();
728	>	}});
729	>
730	>	t.start();
731	>	Thread.sleep(SHORT_DELAY_MS);
732	>	t.interrupt();
733	>	Thread.sleep(SHORT_DELAY_MS);
734	>	t.join();
735	>	lock.writeLock().unlock();
736		}
737
738		/**
739		*  read lockInterruptibly succeeds if lock free else is interruptible
740		*/
741	<	public void testReadLockInterruptibly() {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	<	try {
744	<	lock.writeLock().lockInterruptibly();
745	<	} catch(Exception e) {
746	<	unexpectedException();
747	<	}
748	<	Thread t = new Thread(new Runnable() {
749	<	public void run() {
750	<	try {
751	<	lock.readLock().lockInterruptibly();
752	<	threadShouldThrow();
753	<	}
527	<	catch(InterruptedException success) {
528	<	}
529	<	}
530	<	});
531	<	try {
532	<	t.start();
533	<	t.interrupt();
534	<	t.join();
535	<	lock.writeLock().unlock();
536	<	} catch(Exception e){
537	<	unexpectedException();
538	<	}
741	>	public void testReadLockInterruptibly() throws InterruptedException {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	>	lock.writeLock().lockInterruptibly();
744	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
745	>	public void realRun() throws InterruptedException {
746	>	lock.readLock().lockInterruptibly();
747	>	}});
748	>
749	>	t.start();
750	>	Thread.sleep(SHORT_DELAY_MS);
751	>	t.interrupt();
752	>	t.join();
753	>	lock.writeLock().unlock();
754		}
755
756		/**
757		* Calling await without holding lock throws IllegalMonitorStateException
758		*/
759	<	public void testAwait_IllegalMonitor() {
760	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	>	public void testAwait_IllegalMonitor() throws InterruptedException {
760	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761		final Condition c = lock.writeLock().newCondition();
762		try {
763		c.await();
764		shouldThrow();
765	<	}
551	<	catch (IllegalMonitorStateException success) {
552	<	}
553	<	catch (Exception ex) {
554	<	shouldThrow();
555	<	}
765	>	} catch (IllegalMonitorStateException success) {}
766		}
767
768		/**
769		* Calling signal without holding lock throws IllegalMonitorStateException
770		*/
771		public void testSignal_IllegalMonitor() {
772	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
773		final Condition c = lock.writeLock().newCondition();
774		try {
775		c.signal();
776		shouldThrow();
777	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
777	>	} catch (IllegalMonitorStateException success) {}
778		}
779
780		/**
781		* awaitNanos without a signal times out
782		*/
783	<	public void testAwaitNanos_Timeout() {
784	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
783	>	public void testAwaitNanos_Timeout() throws InterruptedException {
784	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
785		final Condition c = lock.writeLock().newCondition();
786	<	try {
787	<	lock.writeLock().lock();
788	<	long t = c.awaitNanos(100);
789	<	assertTrue(t <= 0);
790	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
786	>
787	>	lock.writeLock().lock();
788	>	long t = c.awaitNanos(100);
789	>	assertTrue(t <= 0);
790	>	lock.writeLock().unlock();
791		}
792
793
794		/**
795		*  timed await without a signal times out
796		*/
797	<	public void testAwait_Timeout() {
798	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
797	>	public void testAwait_Timeout() throws InterruptedException {
798	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
799		final Condition c = lock.writeLock().newCondition();
800	<	try {
801	<	lock.writeLock().lock();
802	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
602	<	lock.writeLock().unlock();
603	<	}
604	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
800	>	lock.writeLock().lock();
801	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
802	>	lock.writeLock().unlock();
803		}
804
805		/**
806		* awaitUntil without a signal times out
807		*/
808	<	public void testAwaitUntil_Timeout() {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
808	>	public void testAwaitUntil_Timeout() throws InterruptedException {
809	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
810		final Condition c = lock.writeLock().newCondition();
811	<	try {
812	<	lock.writeLock().lock();
813	<	java.util.Date d = new java.util.Date();
814	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
811	>	lock.writeLock().lock();
812	>	java.util.Date d = new java.util.Date();
813	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
814	>	lock.writeLock().unlock();
815		}
816
817		/**
818		* await returns when signalled
819		*/
820	<	public void testAwait() {
821	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820	>	public void testAwait() throws InterruptedException {
821	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
822		final Condition c = lock.writeLock().newCondition();
823	<	Thread t = new Thread(new Runnable() {
824	<	public void run() {
825	<	try {
826	<	lock.writeLock().lock();
827	<	c.await();
828	<	lock.writeLock().unlock();
829	<	}
830	<	catch(InterruptedException e) {
831	<	threadUnexpectedException();
832	<	}
833	<	}
834	<	});
823	>	Thread t = new Thread(new CheckedRunnable() {
824	>	public void realRun() throws InterruptedException {
825	>	lock.writeLock().lock();
826	>	c.await();
827	>	lock.writeLock().unlock();
828	>	}});
829	>
830	>	t.start();
831	>	Thread.sleep(SHORT_DELAY_MS);
832	>	lock.writeLock().lock();
833	>	c.signal();
834	>	lock.writeLock().unlock();
835	>	t.join(SHORT_DELAY_MS);
836	>	assertFalse(t.isAlive());
837	>	}
838	>
839	>	/** A helper class for uninterruptible wait tests */
840	>	class UninterruptableThread extends Thread {
841	>	private Lock lock;
842	>	private Condition c;
843	>
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	<	try {
858	<	t.start();
859	<	Thread.sleep(SHORT_DELAY_MS);
860	<	lock.writeLock().lock();
861	<	c.signal();
862	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
857	>	while (!canAwake) {
858	>	c.awaitUninterruptibly();
859	>	}
860	>
861	>	interrupted = isInterrupted();
862	>	lock.unlock();
863		}
864		}
865
866		/**
867		* awaitUninterruptibly doesn't abort on interrupt
868		*/
869	<	public void testAwaitUninterruptibly() {
870	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	>	public void testAwaitUninterruptibly() throws InterruptedException {
870	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
871		final Condition c = lock.writeLock().newCondition();
872	<	Thread t = new Thread(new Runnable() {
873	<	public void run() {
874	<	lock.writeLock().lock();
668	<	c.awaitUninterruptibly();
669	<	lock.writeLock().unlock();
670	<	}
671	<	});
872	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
873	>
874	>	thread.start();
875
876	+	while (!thread.lockStarted) {
877	+	Thread.sleep(100);
878	+	}
879	+
880	+	lock.writeLock().lock();
881		try {
882	<	t.start();
883	<	Thread.sleep(SHORT_DELAY_MS);
676	<	t.interrupt();
677	<	lock.writeLock().lock();
882	>	thread.interrupt();
883	>	thread.canAwake = true;
884		c.signal();
885	+	} finally {
886		lock.writeLock().unlock();
680	–	assert(t.isInterrupted());
681	–	t.join(SHORT_DELAY_MS);
682	–	assertFalse(t.isAlive());
683	–	}
684	–	catch (Exception ex) {
685	–	unexpectedException();
887		}
888	+
889	+	thread.join();
890	+	assertTrue(thread.interrupted);
891	+	assertFalse(thread.isAlive());
892		}
893
894		/**
895		* await is interruptible
896		*/
897	<	public void testAwait_Interrupt() {
898	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
897	>	public void testAwait_Interrupt() throws InterruptedException {
898	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
899		final Condition c = lock.writeLock().newCondition();
900	<	Thread t = new Thread(new Runnable() {
901	<	public void run() {
902	<	try {
903	<	lock.writeLock().lock();
904	<	c.await();
905	<	lock.writeLock().unlock();
906	<	threadShouldThrow();
907	<	}
908	<	catch(InterruptedException success) {
909	<	}
910	<	}
911	<	});
707	<
708	<	try {
709	<	t.start();
710	<	Thread.sleep(SHORT_DELAY_MS);
711	<	t.interrupt();
712	<	t.join(SHORT_DELAY_MS);
713	<	assertFalse(t.isAlive());
714	<	}
715	<	catch (Exception ex) {
716	<	unexpectedException();
717	<	}
900	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
901	>	public void realRun() throws InterruptedException {
902	>	lock.writeLock().lock();
903	>	c.await();
904	>	lock.writeLock().unlock();
905	>	}});
906	>
907	>	t.start();
908	>	Thread.sleep(SHORT_DELAY_MS);
909	>	t.interrupt();
910	>	t.join(SHORT_DELAY_MS);
911	>	assertFalse(t.isAlive());
912		}
913
914		/**
915		* awaitNanos is interruptible
916		*/
917	<	public void testAwaitNanos_Interrupt() {
918	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
917	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
918	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
919		final Condition c = lock.writeLock().newCondition();
920	<	Thread t = new Thread(new Runnable() {
921	<	public void run() {
922	<	try {
923	<	lock.writeLock().lock();
924	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
925	<	lock.writeLock().unlock();
926	<	threadShouldThrow();
927	<	}
928	<	catch(InterruptedException success) {
929	<	}
930	<	}
931	<	});
738	<
739	<	try {
740	<	t.start();
741	<	Thread.sleep(SHORT_DELAY_MS);
742	<	t.interrupt();
743	<	t.join(SHORT_DELAY_MS);
744	<	assertFalse(t.isAlive());
745	<	}
746	<	catch (Exception ex) {
747	<	unexpectedException();
748	<	}
920	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
921	>	public void realRun() throws InterruptedException {
922	>	lock.writeLock().lock();
923	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
924	>	lock.writeLock().unlock();
925	>	}});
926	>
927	>	t.start();
928	>	Thread.sleep(SHORT_DELAY_MS);
929	>	t.interrupt();
930	>	t.join(SHORT_DELAY_MS);
931	>	assertFalse(t.isAlive());
932		}
933
934		/**
935		* awaitUntil is interruptible
936		*/
937	<	public void testAwaitUntil_Interrupt() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
937	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
938	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
939		final Condition c = lock.writeLock().newCondition();
940	<	Thread t = new Thread(new Runnable() {
941	<	public void run() {
942	<	try {
943	<	lock.writeLock().lock();
944	<	java.util.Date d = new java.util.Date();
945	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
946	<	lock.writeLock().unlock();
947	<	threadShouldThrow();
948	<	}
949	<	catch(InterruptedException success) {
950	<	}
951	<	}
952	<	});
770	<
771	<	try {
772	<	t.start();
773	<	Thread.sleep(SHORT_DELAY_MS);
774	<	t.interrupt();
775	<	t.join(SHORT_DELAY_MS);
776	<	assertFalse(t.isAlive());
777	<	}
778	<	catch (Exception ex) {
779	<	unexpectedException();
780	<	}
940	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
941	>	public void realRun() throws InterruptedException {
942	>	lock.writeLock().lock();
943	>	java.util.Date d = new java.util.Date();
944	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
945	>	lock.writeLock().unlock();
946	>	}});
947	>
948	>	t.start();
949	>	Thread.sleep(SHORT_DELAY_MS);
950	>	t.interrupt();
951	>	t.join(SHORT_DELAY_MS);
952	>	assertFalse(t.isAlive());
953		}
954
955		/**
956		* signalAll wakes up all threads
957		*/
958	<	public void testSignalAll() {
959	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
958	>	public void testSignalAll() throws InterruptedException {
959	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960		final Condition c = lock.writeLock().newCondition();
961	<	Thread t1 = new Thread(new Runnable() {
962	<	public void run() {
963	<	try {
964	<	lock.writeLock().lock();
965	<	c.await();
966	<	lock.writeLock().unlock();
967	<	}
968	<	catch(InterruptedException e) {
969	<	threadUnexpectedException();
970	<	}
971	<	}
972	<	});
973	<
974	<	Thread t2 = new Thread(new Runnable() {
975	<	public void run() {
976	<	try {
977	<	lock.writeLock().lock();
978	<	c.await();
979	<	lock.writeLock().unlock();
980	<	}
981	<	catch(InterruptedException e) {
982	<	threadUnexpectedException();
983	<	}
984	<	}
813	<	});
814	<
815	<	try {
816	<	t1.start();
817	<	t2.start();
818	<	Thread.sleep(SHORT_DELAY_MS);
819	<	lock.writeLock().lock();
820	<	c.signalAll();
821	<	lock.writeLock().unlock();
822	<	t1.join(SHORT_DELAY_MS);
823	<	t2.join(SHORT_DELAY_MS);
824	<	assertFalse(t1.isAlive());
825	<	assertFalse(t2.isAlive());
826	<	}
827	<	catch (Exception ex) {
828	<	unexpectedException();
829	<	}
961	>	Thread t1 = new Thread(new CheckedRunnable() {
962	>	public void realRun() throws InterruptedException {
963	>	lock.writeLock().lock();
964	>	c.await();
965	>	lock.writeLock().unlock();
966	>	}});
967	>
968	>	Thread t2 = new Thread(new CheckedRunnable() {
969	>	public void realRun() throws InterruptedException {
970	>	lock.writeLock().lock();
971	>	c.await();
972	>	lock.writeLock().unlock();
973	>	}});
974	>
975	>	t1.start();
976	>	t2.start();
977	>	Thread.sleep(SHORT_DELAY_MS);
978	>	lock.writeLock().lock();
979	>	c.signalAll();
980	>	lock.writeLock().unlock();
981	>	t1.join(SHORT_DELAY_MS);
982	>	t2.join(SHORT_DELAY_MS);
983	>	assertFalse(t1.isAlive());
984	>	assertFalse(t2.isAlive());
985		}
986
987		/**
988		* A serialized lock deserializes as unlocked
989		*/
990	<	public void testSerialization() {
990	>	public void testSerialization() throws Exception {
991		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
992		l.readLock().lock();
993		l.readLock().unlock();
994
995	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
996	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
997	+	out.writeObject(l);
998	+	out.close();
999	+
1000	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1001	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1002	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1003	+	r.readLock().lock();
1004	+	r.readLock().unlock();
1005	+	}
1006	+
1007	+	/**
1008	+	* hasQueuedThreads reports whether there are waiting threads
1009	+	*/
1010	+	public void testhasQueuedThreads() throws InterruptedException {
1011	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1012	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1013	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1014	+	assertFalse(lock.hasQueuedThreads());
1015	+	lock.writeLock().lock();
1016	+	t1.start();
1017	+	Thread.sleep(SHORT_DELAY_MS);
1018	+	assertTrue(lock.hasQueuedThreads());
1019	+	t2.start();
1020	+	Thread.sleep(SHORT_DELAY_MS);
1021	+	assertTrue(lock.hasQueuedThreads());
1022	+	t1.interrupt();
1023	+	Thread.sleep(SHORT_DELAY_MS);
1024	+	assertTrue(lock.hasQueuedThreads());
1025	+	lock.writeLock().unlock();
1026	+	Thread.sleep(SHORT_DELAY_MS);
1027	+	assertFalse(lock.hasQueuedThreads());
1028	+	t1.join();
1029	+	t2.join();
1030	+	}
1031	+
1032	+	/**
1033	+	* hasQueuedThread(null) throws NPE
1034	+	*/
1035	+	public void testHasQueuedThreadNPE() {
1036	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1037		try {
1038	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1039	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1040	<	out.writeObject(l);
1041	<	out.close();
1042	<
1043	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1044	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1045	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1046	<	r.readLock().lock();
1047	<	r.readLock().unlock();
1048	<	} catch(Exception e){
1049	<	e.printStackTrace();
1050	<	unexpectedException();
1051	<	}
1038	>	sync.hasQueuedThread(null);
1039	>	shouldThrow();
1040	>	} catch (NullPointerException success) {}
1041	>	}
1042	>
1043	>	/**
1044	>	* hasQueuedThread reports whether a thread is queued.
1045	>	*/
1046	>	public void testHasQueuedThread() throws InterruptedException {
1047	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1048	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1049	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1050	>	assertFalse(sync.hasQueuedThread(t1));
1051	>	assertFalse(sync.hasQueuedThread(t2));
1052	>	sync.writeLock().lock();
1053	>	t1.start();
1054	>	Thread.sleep(SHORT_DELAY_MS);
1055	>	assertTrue(sync.hasQueuedThread(t1));
1056	>	t2.start();
1057	>	Thread.sleep(SHORT_DELAY_MS);
1058	>	assertTrue(sync.hasQueuedThread(t1));
1059	>	assertTrue(sync.hasQueuedThread(t2));
1060	>	t1.interrupt();
1061	>	Thread.sleep(SHORT_DELAY_MS);
1062	>	assertFalse(sync.hasQueuedThread(t1));
1063	>	assertTrue(sync.hasQueuedThread(t2));
1064	>	sync.writeLock().unlock();
1065	>	Thread.sleep(SHORT_DELAY_MS);
1066	>	assertFalse(sync.hasQueuedThread(t1));
1067	>	Thread.sleep(SHORT_DELAY_MS);
1068	>	assertFalse(sync.hasQueuedThread(t2));
1069	>	t1.join();
1070	>	t2.join();
1071		}
1072
1073	+
1074		/**
1075		* getQueueLength reports number of waiting threads
1076		*/
1077	<	public void testGetQueueLength() {
1078	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1077	>	public void testGetQueueLength() throws InterruptedException {
1078	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1079		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1080		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1081	<	try {
1082	<	assertEquals(0, lock.getQueueLength());
1083	<	lock.writeLock().lock();
1084	<	t1.start();
1085	<	Thread.sleep(SHORT_DELAY_MS);
1086	<	assertEquals(1, lock.getQueueLength());
1087	<	t2.start();
1088	<	Thread.sleep(SHORT_DELAY_MS);
1089	<	assertEquals(2, lock.getQueueLength());
1090	<	t1.interrupt();
1091	<	Thread.sleep(SHORT_DELAY_MS);
1092	<	assertEquals(1, lock.getQueueLength());
1093	<	lock.writeLock().unlock();
1094	<	Thread.sleep(SHORT_DELAY_MS);
1095	<	assertEquals(0, lock.getQueueLength());
1096	<	t1.join();
1097	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1081	>	assertEquals(0, lock.getQueueLength());
1082	>	lock.writeLock().lock();
1083	>	t1.start();
1084	>	Thread.sleep(SHORT_DELAY_MS);
1085	>	assertEquals(1, lock.getQueueLength());
1086	>	t2.start();
1087	>	Thread.sleep(SHORT_DELAY_MS);
1088	>	assertEquals(2, lock.getQueueLength());
1089	>	t1.interrupt();
1090	>	Thread.sleep(SHORT_DELAY_MS);
1091	>	assertEquals(1, lock.getQueueLength());
1092	>	lock.writeLock().unlock();
1093	>	Thread.sleep(SHORT_DELAY_MS);
1094	>	assertEquals(0, lock.getQueueLength());
1095	>	t1.join();
1096	>	t2.join();
1097	>	}
1098
1099		/**
1100		* getQueuedThreads includes waiting threads
1101		*/
1102	<	public void testGetQueuedThreads() {
1103	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1102	>	public void testGetQueuedThreads() throws InterruptedException {
1103	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1104		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1105		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1106	+	assertTrue(lock.getQueuedThreads().isEmpty());
1107	+	lock.writeLock().lock();
1108	+	assertTrue(lock.getQueuedThreads().isEmpty());
1109	+	t1.start();
1110	+	Thread.sleep(SHORT_DELAY_MS);
1111	+	assertTrue(lock.getQueuedThreads().contains(t1));
1112	+	t2.start();
1113	+	Thread.sleep(SHORT_DELAY_MS);
1114	+	assertTrue(lock.getQueuedThreads().contains(t1));
1115	+	assertTrue(lock.getQueuedThreads().contains(t2));
1116	+	t1.interrupt();
1117	+	Thread.sleep(SHORT_DELAY_MS);
1118	+	assertFalse(lock.getQueuedThreads().contains(t1));
1119	+	assertTrue(lock.getQueuedThreads().contains(t2));
1120	+	lock.writeLock().unlock();
1121	+	Thread.sleep(SHORT_DELAY_MS);
1122	+	assertTrue(lock.getQueuedThreads().isEmpty());
1123	+	t1.join();
1124	+	t2.join();
1125	+	}
1126	+
1127	+	/**
1128	+	* hasWaiters throws NPE if null
1129	+	*/
1130	+	public void testHasWaitersNPE() {
1131	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132		try {
1133	<	assertTrue(lock.getQueuedThreads().isEmpty());
1134	<	lock.writeLock().lock();
1135	<	assertTrue(lock.getQueuedThreads().isEmpty());
1136	<	t1.start();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().contains(t1));
900	<	t2.start();
901	<	Thread.sleep(SHORT_DELAY_MS);
902	<	assertTrue(lock.getQueuedThreads().contains(t1));
903	<	assertTrue(lock.getQueuedThreads().contains(t2));
904	<	t1.interrupt();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	assertFalse(lock.getQueuedThreads().contains(t1));
907	<	assertTrue(lock.getQueuedThreads().contains(t2));
908	<	lock.writeLock().unlock();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	assertTrue(lock.getQueuedThreads().isEmpty());
911	<	t1.join();
912	<	t2.join();
913	<	} catch(Exception e){
914	<	unexpectedException();
915	<	}
916	<	}
1133	>	lock.hasWaiters(null);
1134	>	shouldThrow();
1135	>	} catch (NullPointerException success) {}
1136	>	}
1137
1138		/**
1139	<	* hasWaiters returns true when a thread is waiting, else false
1139	>	* getWaitQueueLength throws NPE if null
1140		*/
1141	<	public void testHasWaiters() {
1142	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1143	<	final AbstractReentrantLock.ConditionObject c = (AbstractReentrantLock.ConditionObject)(lock.writeLock().newCondition());
1144	<	Thread t = new Thread(new Runnable() {
1145	<	public void run() {
1146	<	try {
1147	<	lock.writeLock().lock();
1148	<	threadAssertFalse(c.hasWaiters());
929	<	threadAssertEquals(0, c.getWaitQueueLength());
930	<	c.await();
931	<	lock.writeLock().unlock();
932	<	}
933	<	catch(InterruptedException e) {
934	<	threadUnexpectedException();
935	<	}
936	<	}
937	<	});
1141	>	public void testGetWaitQueueLengthNPE() {
1142	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1143	>	try {
1144	>	lock.getWaitQueueLength(null);
1145	>	shouldThrow();
1146	>	} catch (NullPointerException success) {}
1147	>	}
1148	>
1149
1150	+	/**
1151	+	* getWaitingThreads throws NPE if null
1152	+	*/
1153	+	public void testGetWaitingThreadsNPE() {
1154	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1155		try {
1156	<	t.start();
1157	<	Thread.sleep(SHORT_DELAY_MS);
1158	<	lock.writeLock().lock();
943	<	assertTrue(c.hasWaiters());
944	<	assertEquals(1, c.getWaitQueueLength());
945	<	c.signal();
946	<	lock.writeLock().unlock();
947	<	Thread.sleep(SHORT_DELAY_MS);
948	<	lock.writeLock().lock();
949	<	assertFalse(c.hasWaiters());
950	<	assertEquals(0, c.getWaitQueueLength());
951	<	lock.writeLock().unlock();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
954	<	}
955	<	catch (Exception ex) {
956	<	unexpectedException();
957	<	}
1156	>	lock.getWaitingThreads(null);
1157	>	shouldThrow();
1158	>	} catch (NullPointerException success) {}
1159		}
1160
1161		/**
1162	<	* getWaitQueueLength returns number of waiting threads
1162	>	* hasWaiters throws IAE if not owned
1163		*/
1164	<	public void testGetWaitQueueLength() {
1165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1166	<	final AbstractReentrantLock.ConditionObject c = (AbstractReentrantLock.ConditionObject)(lock.writeLock().newCondition());
1167	<	Thread t1 = new Thread(new Runnable() {
1168	<	public void run() {
1169	<	try {
1170	<	lock.writeLock().lock();
1171	<	threadAssertFalse(c.hasWaiters());
1172	<	threadAssertEquals(0, c.getWaitQueueLength());
972	<	c.await();
973	<	lock.writeLock().unlock();
974	<	}
975	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
980	<
981	<	Thread t2 = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.writeLock().lock();
985	<	threadAssertTrue(c.hasWaiters());
986	<	threadAssertEquals(1, c.getWaitQueueLength());
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	}
990	<	catch(InterruptedException e) {
991	<	threadUnexpectedException();
992	<	}
993	<	}
994	<	});
1164	>	public void testHasWaitersIAE() {
1165	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1166	>	final Condition c = lock.writeLock().newCondition();
1167	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1168	>	try {
1169	>	lock2.hasWaiters(c);
1170	>	shouldThrow();
1171	>	} catch (IllegalArgumentException success) {}
1172	>	}
1173
1174	+	/**
1175	+	* hasWaiters throws IMSE if not locked
1176	+	*/
1177	+	public void testHasWaitersIMSE() {
1178	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1179	+	final Condition c = lock.writeLock().newCondition();
1180		try {
1181	<	t1.start();
1182	<	Thread.sleep(SHORT_DELAY_MS);
1183	<	t2.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	lock.writeLock().lock();
1002	<	assertTrue(c.hasWaiters());
1003	<	assertEquals(2, c.getWaitQueueLength());
1004	<	c.signalAll();
1005	<	lock.writeLock().unlock();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	lock.writeLock().lock();
1008	<	assertFalse(c.hasWaiters());
1009	<	assertEquals(0, c.getWaitQueueLength());
1010	<	lock.writeLock().unlock();
1011	<	t1.join(SHORT_DELAY_MS);
1012	<	t2.join(SHORT_DELAY_MS);
1013	<	assertFalse(t1.isAlive());
1014	<	assertFalse(t2.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	unexpectedException();
1018	<	}
1181	>	lock.hasWaiters(c);
1182	>	shouldThrow();
1183	>	} catch (IllegalMonitorStateException success) {}
1184		}
1185
1186	+
1187		/**
1188	<	* getWaitingThreads returns only and all waiting threads
1188	>	* getWaitQueueLength throws IAE if not owned
1189	>	*/
1190	>	public void testGetWaitQueueLengthIAE() {
1191	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1192	>	final Condition c = lock.writeLock().newCondition();
1193	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1194	>	try {
1195	>	lock2.getWaitQueueLength(c);
1196	>	shouldThrow();
1197	>	} catch (IllegalArgumentException success) {}
1198	>	}
1199	>
1200	>	/**
1201	>	* getWaitQueueLength throws IMSE if not locked
1202		*/
1203	<	public void testGetWaitingThreads() {
1204	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1205	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1206	<	Thread t1 = new Thread(new Runnable() {
1207	<	public void run() {
1208	<	try {
1209	<	lock.writeLock().lock();
1210	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1032	<	c.await();
1033	<	lock.writeLock().unlock();
1034	<	}
1035	<	catch(InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1040	<
1041	<	Thread t2 = new Thread(new Runnable() {
1042	<	public void run() {
1043	<	try {
1044	<	lock.writeLock().lock();
1045	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
1046	<	c.await();
1047	<	lock.writeLock().unlock();
1048	<	}
1049	<	catch(InterruptedException e) {
1050	<	threadUnexpectedException();
1051	<	}
1052	<	}
1053	<	});
1203	>	public void testGetWaitQueueLengthIMSE() {
1204	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1205	>	final Condition c = lock.writeLock().newCondition();
1206	>	try {
1207	>	lock.getWaitQueueLength(c);
1208	>	shouldThrow();
1209	>	} catch (IllegalMonitorStateException success) {}
1210	>	}
1211
1212	+
1213	+	/**
1214	+	* getWaitingThreads throws IAE if not owned
1215	+	*/
1216	+	public void testGetWaitingThreadsIAE() {
1217	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1218	+	final Condition c = lock.writeLock().newCondition();
1219	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1220		try {
1221	<	lock.writeLock().lock();
1222	<	assertTrue(c.getWaitingThreads().isEmpty());
1223	<	lock.writeLock().unlock();
1224	<	t1.start();
1225	<	Thread.sleep(SHORT_DELAY_MS);
1226	<	t2.start();
1227	<	Thread.sleep(SHORT_DELAY_MS);
1228	<	lock.writeLock().lock();
1229	<	assertTrue(c.hasWaiters());
1230	<	assertTrue(c.getWaitingThreads().contains(t1));
1231	<	assertTrue(c.getWaitingThreads().contains(t2));
1232	<	c.signalAll();
1233	<	lock.writeLock().unlock();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1235	<	lock.writeLock().lock();
1236	<	assertFalse(c.hasWaiters());
1237	<	assertTrue(c.getWaitingThreads().isEmpty());
1238	<	lock.writeLock().unlock();
1239	<	t1.join(SHORT_DELAY_MS);
1240	<	t2.join(SHORT_DELAY_MS);
1241	<	assertFalse(t1.isAlive());
1242	<	assertFalse(t2.isAlive());
1243	<	}
1244	<	catch (Exception ex) {
1245	<	unexpectedException();
1246	<	}
1221	>	lock2.getWaitingThreads(c);
1222	>	shouldThrow();
1223	>	} catch (IllegalArgumentException success) {}
1224	>	}
1225	>
1226	>	/**
1227	>	* getWaitingThreads throws IMSE if not locked
1228	>	*/
1229	>	public void testGetWaitingThreadsIMSE() {
1230	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1231	>	final Condition c = lock.writeLock().newCondition();
1232	>	try {
1233	>	lock.getWaitingThreads(c);
1234	>	shouldThrow();
1235	>	} catch (IllegalMonitorStateException success) {}
1236	>	}
1237	>
1238	>
1239	>	/**
1240	>	* hasWaiters returns true when a thread is waiting, else false
1241	>	*/
1242	>	public void testHasWaiters() throws InterruptedException {
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	>	final Condition c = lock.writeLock().newCondition();
1245	>	Thread t = new Thread(new CheckedRunnable() {
1246	>	public void realRun() throws InterruptedException {
1247	>	lock.writeLock().lock();
1248	>	threadAssertFalse(lock.hasWaiters(c));
1249	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1250	>	c.await();
1251	>	lock.writeLock().unlock();
1252	>	}});
1253	>
1254	>	t.start();
1255	>	Thread.sleep(SHORT_DELAY_MS);
1256	>	lock.writeLock().lock();
1257	>	assertTrue(lock.hasWaiters(c));
1258	>	assertEquals(1, lock.getWaitQueueLength(c));
1259	>	c.signal();
1260	>	lock.writeLock().unlock();
1261	>	Thread.sleep(SHORT_DELAY_MS);
1262	>	lock.writeLock().lock();
1263	>	assertFalse(lock.hasWaiters(c));
1264	>	assertEquals(0, lock.getWaitQueueLength(c));
1265	>	lock.writeLock().unlock();
1266	>	t.join(SHORT_DELAY_MS);
1267	>	assertFalse(t.isAlive());
1268	>	}
1269	>
1270	>	/**
1271	>	* getWaitQueueLength returns number of waiting threads
1272	>	*/
1273	>	public void testGetWaitQueueLength() throws InterruptedException {
1274	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1275	>	final Condition c = lock.writeLock().newCondition();
1276	>	Thread t = new Thread(new CheckedRunnable() {
1277	>	public void realRun() throws InterruptedException {
1278	>	lock.writeLock().lock();
1279	>	threadAssertFalse(lock.hasWaiters(c));
1280	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1281	>	c.await();
1282	>	lock.writeLock().unlock();
1283	>	}});
1284	>
1285	>	t.start();
1286	>	Thread.sleep(SHORT_DELAY_MS);
1287	>	lock.writeLock().lock();
1288	>	assertTrue(lock.hasWaiters(c));
1289	>	assertEquals(1, lock.getWaitQueueLength(c));
1290	>	c.signal();
1291	>	lock.writeLock().unlock();
1292	>	Thread.sleep(SHORT_DELAY_MS);
1293	>	lock.writeLock().lock();
1294	>	assertFalse(lock.hasWaiters(c));
1295	>	assertEquals(0, lock.getWaitQueueLength(c));
1296	>	lock.writeLock().unlock();
1297	>	t.join(SHORT_DELAY_MS);
1298	>	assertFalse(t.isAlive());
1299	>	}
1300	>
1301	>
1302	>	/**
1303	>	* getWaitingThreads returns only and all waiting threads
1304	>	*/
1305	>	public void testGetWaitingThreads() throws InterruptedException {
1306	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307	>	final Condition c = lock.writeLock().newCondition();
1308	>	Thread t1 = new Thread(new CheckedRunnable() {
1309	>	public void realRun() throws InterruptedException {
1310	>	lock.writeLock().lock();
1311	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1312	>	c.await();
1313	>	lock.writeLock().unlock();
1314	>	}});
1315	>
1316	>	Thread t2 = new Thread(new CheckedRunnable() {
1317	>	public void realRun() throws InterruptedException {
1318	>	lock.writeLock().lock();
1319	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1320	>	c.await();
1321	>	lock.writeLock().unlock();
1322	>	}});
1323	>
1324	>	lock.writeLock().lock();
1325	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1326	>	lock.writeLock().unlock();
1327	>	t1.start();
1328	>	Thread.sleep(SHORT_DELAY_MS);
1329	>	t2.start();
1330	>	Thread.sleep(SHORT_DELAY_MS);
1331	>	lock.writeLock().lock();
1332	>	assertTrue(lock.hasWaiters(c));
1333	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1334	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1335	>	c.signalAll();
1336	>	lock.writeLock().unlock();
1337	>	Thread.sleep(SHORT_DELAY_MS);
1338	>	lock.writeLock().lock();
1339	>	assertFalse(lock.hasWaiters(c));
1340	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1341	>	lock.writeLock().unlock();
1342	>	t1.join(SHORT_DELAY_MS);
1343	>	t2.join(SHORT_DELAY_MS);
1344	>	assertFalse(t1.isAlive());
1345	>	assertFalse(t2.isAlive());
1346	>	}
1347	>
1348	>	/**
1349	>	* toString indicates current lock state
1350	>	*/
1351	>	public void testToString() {
1352	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1353	>	String us = lock.toString();
1354	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1355	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1356	>	lock.writeLock().lock();
1357	>	String ws = lock.toString();
1358	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1359	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1360	>	lock.writeLock().unlock();
1361	>	lock.readLock().lock();
1362	>	lock.readLock().lock();
1363	>	String rs = lock.toString();
1364	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1365	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1366	>	}
1367	>
1368	>	/**
1369	>	* readLock.toString indicates current lock state
1370	>	*/
1371	>	public void testReadLockToString() {
1372	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1373	>	String us = lock.readLock().toString();
1374	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1375	>	lock.readLock().lock();
1376	>	lock.readLock().lock();
1377	>	String rs = lock.readLock().toString();
1378	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1379	>	}
1380	>
1381	>	/**
1382	>	* writeLock.toString indicates current lock state
1383	>	*/
1384	>	public void testWriteLockToString() {
1385	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1386	>	String us = lock.writeLock().toString();
1387	>	assertTrue(us.indexOf("Unlocked") >= 0);
1388	>	lock.writeLock().lock();
1389	>	String ls = lock.writeLock().toString();
1390	>	assertTrue(ls.indexOf("Locked") >= 0);
1391		}
1392
1393		}

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