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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.35 by jsr166, Sat Nov 21 02:07:27 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.*;
#	Line 13 | Line 14 | import java.util.*;
14
15		public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
20	<	return new TestSuite(ReentrantReadWriteLockTest.class);
20	>	return new TestSuite(ReentrantReadWriteLockTest.class);
21		}
22
23		/**
24		* A runnable calling lockInterruptibly
25		*/
26	<	class InterruptibleLockRunnable implements Runnable {
26	>	class InterruptibleLockRunnable extends CheckedRunnable {
27		final ReentrantReadWriteLock lock;
28		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
29	<	public void run() {
30	<	try {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
29	>	public void realRun() throws InterruptedException {
30	>	lock.writeLock().lockInterruptibly();
31		}
32		}
33
#	Line 37 | Line 36 | public class ReentrantReadWriteLockTest
36		* A runnable calling lockInterruptibly that expects to be
37		* interrupted
38		*/
39	<	class InterruptedLockRunnable implements Runnable {
39	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40		final ReentrantReadWriteLock lock;
41		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
42	<	public void run() {
43	<	try {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
42	>	public void realRun() throws InterruptedException {
43	>	lock.writeLock().lockInterruptibly();
44		}
45		}
46
#	Line 53 | Line 49 | public class ReentrantReadWriteLockTest
49		*/
50		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
51		PublicReentrantReadWriteLock() { super(); }
52	<	public Collection<Thread> getQueuedThreads() {
53	<	return super.getQueuedThreads();
58	<	}
59	<	public PublicCondition newCondition() {
60	<	return new PublicCondition();
52	>	public Collection<Thread> getQueuedThreads() {
53	>	return super.getQueuedThreads();
54		}
55	<
56	<	class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
64	<	PublicCondition() { }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
55	>	public Collection<Thread> getWaitingThreads(Condition c) {
56	>	return super.getWaitingThreads(c);
57		}
69	–
58		}
59
60		/**
61		* Constructor sets given fairness, and is in unlocked state
62		*/
63	<	public void testConstructor() {
64	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
63	>	public void testConstructor() {
64	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
65		assertFalse(rl.isFair());
66		assertFalse(rl.isWriteLocked());
67		assertEquals(0, rl.getReadLockCount());
68	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
68	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69		assertTrue(r2.isFair());
70		assertFalse(r2.isWriteLocked());
71		assertEquals(0, r2.getReadLockCount());
72	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
73	+	assertFalse(r3.isFair());
74	+	assertFalse(r3.isWriteLocked());
75	+	assertEquals(0, r3.getReadLockCount());
76		}
77
78		/**
79		* write-locking and read-locking an unlocked lock succeed
80		*/
81	<	public void testLock() {
82	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	>	public void testLock() {
82	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
83		rl.writeLock().lock();
84		assertTrue(rl.isWriteLocked());
85		assertTrue(rl.isWriteLockedByCurrentThread());
86	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
87		assertEquals(0, rl.getReadLockCount());
88		rl.writeLock().unlock();
89		assertFalse(rl.isWriteLocked());
90		assertFalse(rl.isWriteLockedByCurrentThread());
91	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
92		assertEquals(0, rl.getReadLockCount());
93		rl.readLock().lock();
94		assertFalse(rl.isWriteLocked());
#	Line 110 | Line 104 | public class ReentrantReadWriteLockTest
104		/**
105		* locking an unlocked fair lock succeeds
106		*/
107	<	public void testFairLock() {
108	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
107	>	public void testFairLock() {
108	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
109		rl.writeLock().lock();
110		assertTrue(rl.isWriteLocked());
111		assertTrue(rl.isWriteLockedByCurrentThread());
112	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
113		assertEquals(0, rl.getReadLockCount());
114		rl.writeLock().unlock();
115		assertFalse(rl.isWriteLocked());
116		assertFalse(rl.isWriteLockedByCurrentThread());
117	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
118		assertEquals(0, rl.getReadLockCount());
119		rl.readLock().lock();
120		assertFalse(rl.isWriteLocked());
#	Line 133 | Line 129 | public class ReentrantReadWriteLockTest
129		/**
130		* getWriteHoldCount returns number of recursive holds
131		*/
132	+	public void testGetWriteHoldCount() {
133	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
134	+	for (int i = 1; i <= SIZE; i++) {
135	+	lock.writeLock().lock();
136	+	assertEquals(i,lock.getWriteHoldCount());
137	+	}
138	+	for (int i = SIZE; i > 0; i--) {
139	+	lock.writeLock().unlock();
140	+	assertEquals(i-1,lock.getWriteHoldCount());
141	+	}
142	+	}
143	+
144	+	/**
145	+	* WriteLock.getHoldCount returns number of recursive holds
146	+	*/
147		public void testGetHoldCount() {
148	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
149	<	for(int i = 1; i <= SIZE; i++) {
150	<	lock.writeLock().lock();
151	<	assertEquals(i,lock.getWriteHoldCount());
152	<	}
153	<	for(int i = SIZE; i > 0; i--) {
154	<	lock.writeLock().unlock();
155	<	assertEquals(i-1,lock.getWriteHoldCount());
156	<	}
148	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
149	>	for (int i = 1; i <= SIZE; i++) {
150	>	lock.writeLock().lock();
151	>	assertEquals(i,lock.writeLock().getHoldCount());
152	>	}
153	>	for (int i = SIZE; i > 0; i--) {
154	>	lock.writeLock().unlock();
155	>	assertEquals(i-1,lock.writeLock().getHoldCount());
156	>	}
157		}
147	–
158
159		/**
160	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
160	>	* getReadHoldCount returns number of recursive holds
161		*/
162	<	public void testUnlock_IllegalMonitorStateException() {
163	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
164	<	try {
165	<	rl.writeLock().unlock();
166	<	shouldThrow();
167	<	} catch(IllegalMonitorStateException success){}
162	>	public void testGetReadHoldCount() {
163	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
164	>	for (int i = 1; i <= SIZE; i++) {
165	>	lock.readLock().lock();
166	>	assertEquals(i,lock.getReadHoldCount());
167	>	}
168	>	for (int i = SIZE; i > 0; i--) {
169	>	lock.readLock().unlock();
170	>	assertEquals(i-1,lock.getReadHoldCount());
171	>	}
172		}
173
174
175		/**
176	<	* write-lockInterruptibly is interruptible
176	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
177		*/
178	<	public void testWriteLockInterruptibly_Interrupted() {
179	<	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	<	});
178	>	public void testUnlock_IllegalMonitorStateException() {
179	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
180		try {
181	<	t.start();
182	<	t.interrupt();
183	<	lock.writeLock().unlock();
184	<	t.join();
185	<	} catch(Exception e){
181	<	unexpectedException();
182	<	}
183	<	}
181	>	rl.writeLock().unlock();
182	>	shouldThrow();
183	>	} catch (IllegalMonitorStateException success) {}
184	>	}
185	>
186
187		/**
188	<	* timed write-trylock is interruptible
188	>	* write-lockInterruptibly is interruptible
189		*/
190	<	public void testWriteTryLock_Interrupted() {
191	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
192	<	lock.writeLock().lock();
193	<	Thread t = new Thread(new Runnable() {
194	<	public void run() {
195	<	try {
196	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
197	<	threadShouldThrow();
198	<	} catch(InterruptedException success){}
199	<	}
200	<	});
201	<	try {
202	<	t.start();
203	<	t.interrupt();
204	<	lock.writeLock().unlock();
205	<	t.join();
206	<	} catch(Exception e){
207	<	unexpectedException();
208	<	}
190	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
191	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
192	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
193	>	public void realRun() throws InterruptedException {
194	>	lock.writeLock().lockInterruptibly();
195	>	lock.writeLock().unlock();
196	>	lock.writeLock().lockInterruptibly();
197	>	lock.writeLock().unlock();
198	>	}});
199	>
200	>	lock.writeLock().lock();
201	>	t.start();
202	>	Thread.sleep(SHORT_DELAY_MS);
203	>	t.interrupt();
204	>	Thread.sleep(SHORT_DELAY_MS);
205	>	lock.writeLock().unlock();
206	>	t.join();
207	>	}
208	>
209	>	/**
210	>	* timed write-tryLock is interruptible
211	>	*/
212	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	>	lock.writeLock().lock();
215	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
216	>	public void realRun() throws InterruptedException {
217	>	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
218	>	}});
219	>
220	>	t.start();
221	>	t.interrupt();
222	>	lock.writeLock().unlock();
223	>	t.join();
224		}
225
226		/**
227		* read-lockInterruptibly is interruptible
228		*/
229	<	public void testReadLockInterruptibly_Interrupted() {
230	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	<	lock.writeLock().lock();
232	<	Thread t = new Thread(new Runnable() {
233	<	public void run() {
234	<	try {
235	<	lock.readLock().lockInterruptibly();
236	<	threadShouldThrow();
237	<	} catch(InterruptedException success){}
238	<	}
239	<	});
240	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	lock.writeLock().unlock();
227	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
230	<	}
231	<	}
229	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
230	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	>	lock.writeLock().lock();
232	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
233	>	public void realRun() throws InterruptedException {
234	>	lock.readLock().lockInterruptibly();
235	>	}});
236	>
237	>	t.start();
238	>	Thread.sleep(SHORT_DELAY_MS);
239	>	t.interrupt();
240	>	Thread.sleep(SHORT_DELAY_MS);
241	>	lock.writeLock().unlock();
242	>	t.join();
243	>	}
244
245		/**
246	<	* timed read-trylock is interruptible
246	>	* timed read-tryLock is interruptible
247		*/
248	<	public void testReadTryLock_Interrupted() {
249	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
250	<	lock.writeLock().lock();
251	<	Thread t = new Thread(new Runnable() {
252	<	public void run() {
253	<	try {
254	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
255	<	threadShouldThrow();
256	<	} catch(InterruptedException success){}
257	<	}
258	<	});
247	<	try {
248	<	t.start();
249	<	t.interrupt();
250	<	t.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
253	<	}
248	>	public void testReadTryLock_Interrupted() throws InterruptedException {
249	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
250	>	lock.writeLock().lock();
251	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
252	>	public void realRun() throws InterruptedException {
253	>	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
254	>	}});
255	>
256	>	t.start();
257	>	t.interrupt();
258	>	t.join();
259		}
260
261	<
261	>
262		/**
263	<	* write-trylock fails if locked
263	>	* write-tryLock fails if locked
264		*/
265	<	public void testWriteTryLockWhenLocked() {
266	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
267	<	lock.writeLock().lock();
268	<	Thread t = new Thread(new Runnable() {
265	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
266	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
267	>	lock.writeLock().lock();
268	>	Thread t = new Thread(new Runnable() {
269		public void run() {
270		threadAssertFalse(lock.writeLock().tryLock());
271	<	}
272	<	});
273	<	try {
274	<	t.start();
275	<	t.join();
276	<	lock.writeLock().unlock();
277	<	} catch(Exception e){
273	<	unexpectedException();
274	<	}
275	<	}
271	>	}
272	>	});
273	>
274	>	t.start();
275	>	t.join();
276	>	lock.writeLock().unlock();
277	>	}
278
279		/**
280	<	* read-trylock fails if locked
280	>	* read-tryLock fails if locked
281		*/
282	<	public void testReadTryLockWhenLocked() {
283	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
284	<	lock.writeLock().lock();
285	<	Thread t = new Thread(new Runnable() {
282	>	public void testReadTryLockWhenLocked() throws InterruptedException {
283	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
284	>	lock.writeLock().lock();
285	>	Thread t = new Thread(new Runnable() {
286		public void run() {
287		threadAssertFalse(lock.readLock().tryLock());
288	<	}
289	<	});
290	<	try {
291	<	t.start();
292	<	t.join();
293	<	lock.writeLock().unlock();
294	<	} catch(Exception e){
293	<	unexpectedException();
294	<	}
295	<	}
288	>	}
289	>	});
290	>
291	>	t.start();
292	>	t.join();
293	>	lock.writeLock().unlock();
294	>	}
295
296		/**
297		* Multiple threads can hold a read lock when not write-locked
298		*/
299	<	public void testMultipleReadLocks() {
300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	<	lock.readLock().lock();
302	<	Thread t = new Thread(new Runnable() {
299	>	public void testMultipleReadLocks() throws InterruptedException {
300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	>	lock.readLock().lock();
302	>	Thread t = new Thread(new Runnable() {
303		public void run() {
304		threadAssertTrue(lock.readLock().tryLock());
305		lock.readLock().unlock();
306	<	}
307	<	});
308	<	try {
309	<	t.start();
310	<	t.join();
311	<	lock.readLock().unlock();
312	<	} catch(Exception e){
314	<	unexpectedException();
315	<	}
316	<	}
306	>	}
307	>	});
308	>
309	>	t.start();
310	>	t.join();
311	>	lock.readLock().unlock();
312	>	}
313
314		/**
315		* A writelock succeeds after reading threads unlock
316		*/
317	<	public void testWriteAfterMultipleReadLocks() {
318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
319	<	lock.readLock().lock();
320	<	Thread t1 = new Thread(new Runnable() {
317	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
318	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
319	>	lock.readLock().lock();
320	>	Thread t1 = new Thread(new Runnable() {
321		public void run() {
322		lock.readLock().lock();
323		lock.readLock().unlock();
324	<	}
325	<	});
326	<	Thread t2 = new Thread(new Runnable() {
324	>	}
325	>	});
326	>	Thread t2 = new Thread(new Runnable() {
327		public void run() {
328		lock.writeLock().lock();
329		lock.writeLock().unlock();
330	<	}
331	<	});
330	>	}
331	>	});
332
333	<	try {
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());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
333	>	t1.start();
334	>	t2.start();
335	>	Thread.sleep(SHORT_DELAY_MS);
336	>	lock.readLock().unlock();
337	>	t1.join(MEDIUM_DELAY_MS);
338	>	t2.join(MEDIUM_DELAY_MS);
339	>	assertTrue(!t1.isAlive());
340	>	assertTrue(!t2.isAlive());
341	>	}
342
343		/**
344		* Readlocks succeed after a writing thread unlocks
345		*/
346	<	public void testReadAfterWriteLock() {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	<	lock.writeLock().lock();
349	<	Thread t1 = new Thread(new Runnable() {
346	>	public void testReadAfterWriteLock() throws InterruptedException {
347	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	>	lock.writeLock().lock();
349	>	Thread t1 = new Thread(new Runnable() {
350		public void run() {
351		lock.readLock().lock();
352		lock.readLock().unlock();
353	<	}
354	<	});
355	<	Thread t2 = new Thread(new Runnable() {
353	>	}
354	>	});
355	>	Thread t2 = new Thread(new Runnable() {
356		public void run() {
357		lock.readLock().lock();
358		lock.readLock().unlock();
359	<	}
360	<	});
359	>	}
360	>	});
361
362	<	try {
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	<	} catch(Exception e){
373	<	unexpectedException();
374	<	}
375	<	}
362	>	t1.start();
363	>	t2.start();
364	>	Thread.sleep(SHORT_DELAY_MS);
365	>	lock.writeLock().unlock();
366	>	t1.join(MEDIUM_DELAY_MS);
367	>	t2.join(MEDIUM_DELAY_MS);
368	>	assertTrue(!t1.isAlive());
369	>	assertTrue(!t2.isAlive());
370	>	}
371	>
372	>	/**
373	>	* Read trylock succeeds if write locked by current thread
374	>	*/
375	>	public void testReadHoldingWriteLock() {
376	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
377	>	lock.writeLock().lock();
378	>	assertTrue(lock.readLock().tryLock());
379	>	lock.readLock().unlock();
380	>	lock.writeLock().unlock();
381	>	}
382	>
383	>	/**
384	>	* Read lock succeeds if write locked by current thread even if
385	>	* other threads are waiting for readlock
386	>	*/
387	>	public void testReadHoldingWriteLock2() throws InterruptedException {
388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
389	>	lock.writeLock().lock();
390	>	Thread t1 = new Thread(new Runnable() {
391	>	public void run() {
392	>	lock.readLock().lock();
393	>	lock.readLock().unlock();
394	>	}
395	>	});
396	>	Thread t2 = new Thread(new Runnable() {
397	>	public void run() {
398	>	lock.readLock().lock();
399	>	lock.readLock().unlock();
400	>	}
401	>	});
402	>
403	>	t1.start();
404	>	t2.start();
405	>	lock.readLock().lock();
406	>	lock.readLock().unlock();
407	>	Thread.sleep(SHORT_DELAY_MS);
408	>	lock.readLock().lock();
409	>	lock.readLock().unlock();
410	>	lock.writeLock().unlock();
411	>	t1.join(MEDIUM_DELAY_MS);
412	>	t2.join(MEDIUM_DELAY_MS);
413	>	assertTrue(!t1.isAlive());
414	>	assertTrue(!t2.isAlive());
415	>	}
416	>
417	>	/**
418	>	*  Read lock succeeds if write locked by current thread even if
419	>	* other threads are waiting for writelock
420	>	*/
421	>	public void testReadHoldingWriteLock3() throws InterruptedException {
422	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
423	>	lock.writeLock().lock();
424	>	Thread t1 = new Thread(new Runnable() {
425	>	public void run() {
426	>	lock.writeLock().lock();
427	>	lock.writeLock().unlock();
428	>	}
429	>	});
430	>	Thread t2 = new Thread(new Runnable() {
431	>	public void run() {
432	>	lock.writeLock().lock();
433	>	lock.writeLock().unlock();
434	>	}
435	>	});
436	>
437	>	t1.start();
438	>	t2.start();
439	>	lock.readLock().lock();
440	>	lock.readLock().unlock();
441	>	Thread.sleep(SHORT_DELAY_MS);
442	>	lock.readLock().lock();
443	>	lock.readLock().unlock();
444	>	lock.writeLock().unlock();
445	>	t1.join(MEDIUM_DELAY_MS);
446	>	t2.join(MEDIUM_DELAY_MS);
447	>	assertTrue(!t1.isAlive());
448	>	assertTrue(!t2.isAlive());
449	>	}
450
451
452		/**
453	<	* Read trylock succeeds if readlocked but not writelocked
453	>	*  Write lock succeeds if write locked by current thread even if
454	>	* other threads are waiting for writelock
455	>	*/
456	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
457	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	lock.writeLock().lock();
459	>	Thread t1 = new Thread(new Runnable() {
460	>	public void run() {
461	>	lock.writeLock().lock();
462	>	lock.writeLock().unlock();
463	>	}
464	>	});
465	>	Thread t2 = new Thread(new Runnable() {
466	>	public void run() {
467	>	lock.writeLock().lock();
468	>	lock.writeLock().unlock();
469	>	}
470	>	});
471	>
472	>	t1.start();
473	>	t2.start();
474	>	lock.writeLock().lock();
475	>	lock.writeLock().unlock();
476	>	Thread.sleep(SHORT_DELAY_MS);
477	>	lock.writeLock().lock();
478	>	lock.writeLock().unlock();
479	>	lock.writeLock().unlock();
480	>	t1.join(MEDIUM_DELAY_MS);
481	>	t2.join(MEDIUM_DELAY_MS);
482	>	assertTrue(!t1.isAlive());
483	>	assertTrue(!t2.isAlive());
484	>	}
485	>
486	>
487	>	/**
488	>	* Fair Read trylock succeeds if write locked by current thread
489		*/
490	<	public void testTryLockWhenReadLocked() {
491	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
492	<	lock.readLock().lock();
493	<	Thread t = new Thread(new Runnable() {
490	>	public void testReadHoldingWriteLockFair() {
491	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
492	>	lock.writeLock().lock();
493	>	assertTrue(lock.readLock().tryLock());
494	>	lock.readLock().unlock();
495	>	lock.writeLock().unlock();
496	>	}
497	>
498	>	/**
499	>	* Fair Read lock succeeds if write locked by current thread even if
500	>	* other threads are waiting for readlock
501	>	*/
502	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
503	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
504	>	lock.writeLock().lock();
505	>	Thread t1 = new Thread(new Runnable() {
506	>	public void run() {
507	>	lock.readLock().lock();
508	>	lock.readLock().unlock();
509	>	}
510	>	});
511	>	Thread t2 = new Thread(new Runnable() {
512	>	public void run() {
513	>	lock.readLock().lock();
514	>	lock.readLock().unlock();
515	>	}
516	>	});
517	>
518	>	t1.start();
519	>	t2.start();
520	>	lock.readLock().lock();
521	>	lock.readLock().unlock();
522	>	Thread.sleep(SHORT_DELAY_MS);
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	lock.writeLock().unlock();
526	>	t1.join(MEDIUM_DELAY_MS);
527	>	t2.join(MEDIUM_DELAY_MS);
528	>	assertTrue(!t1.isAlive());
529	>	assertTrue(!t2.isAlive());
530	>	}
531	>
532	>
533	>	/**
534	>	* Fair Read lock succeeds if write locked by current thread even if
535	>	* other threads are waiting for writelock
536	>	*/
537	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
538	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
539	>	lock.writeLock().lock();
540	>	Thread t1 = new Thread(new Runnable() {
541	>	public void run() {
542	>	lock.writeLock().lock();
543	>	lock.writeLock().unlock();
544	>	}
545	>	});
546	>	Thread t2 = new Thread(new Runnable() {
547	>	public void run() {
548	>	lock.writeLock().lock();
549	>	lock.writeLock().unlock();
550	>	}
551	>	});
552	>
553	>	t1.start();
554	>	t2.start();
555	>	lock.readLock().lock();
556	>	lock.readLock().unlock();
557	>	Thread.sleep(SHORT_DELAY_MS);
558	>	lock.readLock().lock();
559	>	lock.readLock().unlock();
560	>	lock.writeLock().unlock();
561	>	t1.join(MEDIUM_DELAY_MS);
562	>	t2.join(MEDIUM_DELAY_MS);
563	>	assertTrue(!t1.isAlive());
564	>	assertTrue(!t2.isAlive());
565	>	}
566	>
567	>
568	>	/**
569	>	* Fair Write lock succeeds if write locked by current thread even if
570	>	* other threads are waiting for writelock
571	>	*/
572	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
573	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
574	>	lock.writeLock().lock();
575	>	Thread t1 = new Thread(new Runnable() {
576	>	public void run() {
577	>	lock.writeLock().lock();
578	>	lock.writeLock().unlock();
579	>	}
580	>	});
581	>	Thread t2 = new Thread(new Runnable() {
582	>	public void run() {
583	>	lock.writeLock().lock();
584	>	lock.writeLock().unlock();
585	>	}
586	>	});
587	>
588	>	t1.start();
589	>	t2.start();
590	>	Thread.sleep(SHORT_DELAY_MS);
591	>	assertTrue(lock.isWriteLockedByCurrentThread());
592	>	assertTrue(lock.getWriteHoldCount() == 1);
593	>	lock.writeLock().lock();
594	>	assertTrue(lock.getWriteHoldCount() == 2);
595	>	lock.writeLock().unlock();
596	>	lock.writeLock().lock();
597	>	lock.writeLock().unlock();
598	>	lock.writeLock().unlock();
599	>	t1.join(MEDIUM_DELAY_MS);
600	>	t2.join(MEDIUM_DELAY_MS);
601	>	assertTrue(!t1.isAlive());
602	>	assertTrue(!t2.isAlive());
603	>	}
604	>
605	>
606	>	/**
607	>	* Read tryLock succeeds if readlocked but not writelocked
608	>	*/
609	>	public void testTryLockWhenReadLocked() throws InterruptedException {
610	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
611	>	lock.readLock().lock();
612	>	Thread t = new Thread(new Runnable() {
613		public void run() {
614		threadAssertTrue(lock.readLock().tryLock());
615		lock.readLock().unlock();
616	<	}
617	<	});
618	<	try {
619	<	t.start();
620	<	t.join();
621	<	lock.readLock().unlock();
622	<	} catch(Exception e){
623	<	unexpectedException();
405	<	}
406	<	}
616	>	}
617	>	});
618	>
619	>	t.start();
620	>	t.join();
621	>	lock.readLock().unlock();
622	>	}
623	>
624
408	–
625
626		/**
627	<	* write trylock fails when readlocked
627	>	* write tryLock fails when readlocked
628		*/
629	<	public void testWriteTryLockWhenReadLocked() {
630	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
631	<	lock.readLock().lock();
632	<	Thread t = new Thread(new Runnable() {
629	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
630	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
631	>	lock.readLock().lock();
632	>	Thread t = new Thread(new Runnable() {
633		public void run() {
634		threadAssertFalse(lock.writeLock().tryLock());
635	<	}
636	<	});
637	<	try {
638	<	t.start();
639	<	t.join();
640	<	lock.readLock().unlock();
641	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
635	>	}
636	>	});
637	>
638	>	t.start();
639	>	t.join();
640	>	lock.readLock().unlock();
641	>	}
642
430	–
643
644		/**
645	<	* write timed trylock times out if locked
645	>	* Fair Read tryLock succeeds if readlocked but not writelocked
646		*/
647	<	public void testWriteTryLock_Timeout() {
648	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
649	<	lock.writeLock().lock();
650	<	Thread t = new Thread(new Runnable() {
647	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
648	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
649	>	lock.readLock().lock();
650	>	Thread t = new Thread(new Runnable() {
651		public void run() {
652	<	try {
653	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
654	<	} catch (Exception ex) {
655	<	threadUnexpectedException();
656	<	}
657	<	}
658	<	});
659	<	try {
660	<	t.start();
661	<	t.join();
662	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
652	>	threadAssertTrue(lock.readLock().tryLock());
653	>	lock.readLock().unlock();
654	>	}
655	>	});
656	>
657	>	t.start();
658	>	t.join();
659	>	lock.readLock().unlock();
660	>	}
661	>
662	>
663
664		/**
665	<	* read timed trylock times out if write-locked
665	>	* Fair write tryLock fails when readlocked
666		*/
667	<	public void testReadTryLock_Timeout() {
668	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
669	<	lock.writeLock().lock();
670	<	Thread t = new Thread(new Runnable() {
671	<	public void run() {
672	<	try {
673	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
674	<	} catch (Exception ex) {
675	<	threadUnexpectedException();
676	<	}
677	<	}
678	<	});
679	<	try {
680	<	t.start();
681	<	t.join();
682	<	lock.writeLock().unlock();
683	<	} catch(Exception e){
684	<	unexpectedException();
685	<	}
686	<	}
667	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
668	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
669	>	lock.readLock().lock();
670	>	Thread t = new Thread(new Runnable() {
671	>	public void run() {
672	>	threadAssertFalse(lock.writeLock().tryLock());
673	>	}
674	>	});
675	>
676	>	t.start();
677	>	t.join();
678	>	lock.readLock().unlock();
679	>	}
680	>
681	>
682	>
683	>	/**
684	>	* write timed tryLock times out if locked
685	>	*/
686	>	public void testWriteTryLock_Timeout() throws InterruptedException {
687	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
688	>	lock.writeLock().lock();
689	>	Thread t = new Thread(new CheckedRunnable() {
690	>	public void realRun() throws InterruptedException {
691	>	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
692	>	}});
693	>
694	>	t.start();
695	>	t.join();
696	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
697	>	lock.writeLock().unlock();
698	>	}
699	>
700	>	/**
701	>	* read timed tryLock times out if write-locked
702	>	*/
703	>	public void testReadTryLock_Timeout() throws InterruptedException {
704	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	lock.writeLock().lock();
706	>	Thread t = new Thread(new CheckedRunnable() {
707	>	public void realRun() throws InterruptedException {
708	>	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
709	>	}});
710	>
711	>	t.start();
712	>	t.join();
713	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
714	>	lock.writeLock().unlock();
715	>	}
716
717
718		/**
719		* write lockInterruptibly succeeds if lock free else is interruptible
720		*/
721	<	public void testWriteLockInterruptibly() {
722	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
723	<	try {
724	<	lock.writeLock().lockInterruptibly();
725	<	} catch(Exception e) {
726	<	unexpectedException();
727	<	}
728	<	Thread t = new Thread(new Runnable() {
729	<	public void run() {
730	<	try {
731	<	lock.writeLock().lockInterruptibly();
732	<	threadShouldThrow();
733	<	}
734	<	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	<	}
721	>	public void testWriteLockInterruptibly() throws InterruptedException {
722	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
723	>	lock.writeLock().lockInterruptibly();
724	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
725	>	public void realRun() throws InterruptedException {
726	>	lock.writeLock().lockInterruptibly();
727	>	}});
728	>
729	>	t.start();
730	>	Thread.sleep(SHORT_DELAY_MS);
731	>	t.interrupt();
732	>	Thread.sleep(SHORT_DELAY_MS);
733	>	t.join();
734	>	lock.writeLock().unlock();
735		}
736
737		/**
738		*  read lockInterruptibly succeeds if lock free else is interruptible
739		*/
740	<	public void testReadLockInterruptibly() {
741	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
742	<	try {
743	<	lock.writeLock().lockInterruptibly();
744	<	} catch(Exception e) {
745	<	unexpectedException();
746	<	}
747	<	Thread t = new Thread(new Runnable() {
748	<	public void run() {
749	<	try {
750	<	lock.readLock().lockInterruptibly();
751	<	threadShouldThrow();
752	<	}
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	<	}
740	>	public void testReadLockInterruptibly() throws InterruptedException {
741	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
742	>	lock.writeLock().lockInterruptibly();
743	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
744	>	public void realRun() throws InterruptedException {
745	>	lock.readLock().lockInterruptibly();
746	>	}});
747	>
748	>	t.start();
749	>	Thread.sleep(SHORT_DELAY_MS);
750	>	t.interrupt();
751	>	t.join();
752	>	lock.writeLock().unlock();
753		}
754
755		/**
756		* Calling await without holding lock throws IllegalMonitorStateException
757		*/
758	<	public void testAwait_IllegalMonitor() {
759	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
758	>	public void testAwait_IllegalMonitor() throws InterruptedException {
759	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
760		final Condition c = lock.writeLock().newCondition();
761		try {
762		c.await();
763		shouldThrow();
764	<	}
551	<	catch (IllegalMonitorStateException success) {
552	<	}
553	<	catch (Exception ex) {
554	<	shouldThrow();
555	<	}
764	>	} catch (IllegalMonitorStateException success) {}
765		}
766
767		/**
768		* Calling signal without holding lock throws IllegalMonitorStateException
769		*/
770		public void testSignal_IllegalMonitor() {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
771	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772		final Condition c = lock.writeLock().newCondition();
773		try {
774		c.signal();
775		shouldThrow();
776	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
776	>	} catch (IllegalMonitorStateException success) {}
777		}
778
779		/**
780		* awaitNanos without a signal times out
781		*/
782	<	public void testAwaitNanos_Timeout() {
783	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
782	>	public void testAwaitNanos_Timeout() throws InterruptedException {
783	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
784		final Condition c = lock.writeLock().newCondition();
785	<	try {
786	<	lock.writeLock().lock();
787	<	long t = c.awaitNanos(100);
788	<	assertTrue(t <= 0);
789	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
785	>
786	>	lock.writeLock().lock();
787	>	long t = c.awaitNanos(100);
788	>	assertTrue(t <= 0);
789	>	lock.writeLock().unlock();
790		}
791
792
793		/**
794		*  timed await without a signal times out
795		*/
796	<	public void testAwait_Timeout() {
797	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
796	>	public void testAwait_Timeout() throws InterruptedException {
797	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
798		final Condition c = lock.writeLock().newCondition();
799	<	try {
800	<	lock.writeLock().lock();
801	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
602	<	lock.writeLock().unlock();
603	<	}
604	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
799	>	lock.writeLock().lock();
800	>	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
801	>	lock.writeLock().unlock();
802		}
803
804		/**
805		* awaitUntil without a signal times out
806		*/
807	<	public void testAwaitUntil_Timeout() {
808	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
807	>	public void testAwaitUntil_Timeout() throws InterruptedException {
808	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
809		final Condition c = lock.writeLock().newCondition();
810	<	try {
811	<	lock.writeLock().lock();
812	<	java.util.Date d = new java.util.Date();
813	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
810	>	lock.writeLock().lock();
811	>	java.util.Date d = new java.util.Date();
812	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
813	>	lock.writeLock().unlock();
814		}
815
816		/**
817		* await returns when signalled
818		*/
819	<	public void testAwait() {
820	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819	>	public void testAwait() throws InterruptedException {
820	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
821		final Condition c = lock.writeLock().newCondition();
822	<	Thread t = new Thread(new Runnable() {
823	<	public void run() {
824	<	try {
825	<	lock.writeLock().lock();
826	<	c.await();
827	<	lock.writeLock().unlock();
828	<	}
829	<	catch(InterruptedException e) {
830	<	threadUnexpectedException();
831	<	}
832	<	}
833	<	});
822	>	Thread t = new Thread(new CheckedRunnable() {
823	>	public void realRun() throws InterruptedException {
824	>	lock.writeLock().lock();
825	>	c.await();
826	>	lock.writeLock().unlock();
827	>	}});
828	>
829	>	t.start();
830	>	Thread.sleep(SHORT_DELAY_MS);
831	>	lock.writeLock().lock();
832	>	c.signal();
833	>	lock.writeLock().unlock();
834	>	t.join(SHORT_DELAY_MS);
835	>	assertFalse(t.isAlive());
836	>	}
837	>
838	>	/** A helper class for uninterruptible wait tests */
839	>	class UninterruptableThread extends Thread {
840	>	private Lock lock;
841	>	private Condition c;
842	>
843	>	public volatile boolean canAwake = false;
844	>	public volatile boolean interrupted = false;
845	>	public volatile boolean lockStarted = false;
846	>
847	>	public UninterruptableThread(Lock lock, Condition c) {
848	>	this.lock = lock;
849	>	this.c = c;
850	>	}
851	>
852	>	public synchronized void run() {
853	>	lock.lock();
854	>	lockStarted = true;
855
856	<	try {
857	<	t.start();
858	<	Thread.sleep(SHORT_DELAY_MS);
859	<	lock.writeLock().lock();
860	<	c.signal();
861	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
856	>	while (!canAwake) {
857	>	c.awaitUninterruptibly();
858	>	}
859	>
860	>	interrupted = isInterrupted();
861	>	lock.unlock();
862		}
863		}
864
865		/**
866		* awaitUninterruptibly doesn't abort on interrupt
867		*/
868	<	public void testAwaitUninterruptibly() {
869	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868	>	public void testAwaitUninterruptibly() throws InterruptedException {
869	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870		final Condition c = lock.writeLock().newCondition();
871	<	Thread t = new Thread(new Runnable() {
872	<	public void run() {
873	<	lock.writeLock().lock();
668	<	c.awaitUninterruptibly();
669	<	lock.writeLock().unlock();
670	<	}
671	<	});
871	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
872	>
873	>	thread.start();
874
875	+	while (!thread.lockStarted) {
876	+	Thread.sleep(100);
877	+	}
878	+
879	+	lock.writeLock().lock();
880		try {
881	<	t.start();
882	<	Thread.sleep(SHORT_DELAY_MS);
676	<	t.interrupt();
677	<	lock.writeLock().lock();
881	>	thread.interrupt();
882	>	thread.canAwake = true;
883		c.signal();
884	+	} finally {
885		lock.writeLock().unlock();
680	–	assert(t.isInterrupted());
681	–	t.join(SHORT_DELAY_MS);
682	–	assertFalse(t.isAlive());
683	–	}
684	–	catch (Exception ex) {
685	–	unexpectedException();
886		}
887	+
888	+	thread.join();
889	+	assertTrue(thread.interrupted);
890	+	assertFalse(thread.isAlive());
891		}
892
893		/**
894		* await is interruptible
895		*/
896	<	public void testAwait_Interrupt() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	public void testAwait_Interrupt() throws InterruptedException {
897	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
898		final Condition c = lock.writeLock().newCondition();
899	<	Thread t = new Thread(new Runnable() {
900	<	public void run() {
901	<	try {
902	<	lock.writeLock().lock();
903	<	c.await();
904	<	lock.writeLock().unlock();
905	<	threadShouldThrow();
906	<	}
907	<	catch(InterruptedException success) {
908	<	}
909	<	}
910	<	});
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	<	}
899	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
900	>	public void realRun() throws InterruptedException {
901	>	lock.writeLock().lock();
902	>	c.await();
903	>	lock.writeLock().unlock();
904	>	}});
905	>
906	>	t.start();
907	>	Thread.sleep(SHORT_DELAY_MS);
908	>	t.interrupt();
909	>	t.join(SHORT_DELAY_MS);
910	>	assertFalse(t.isAlive());
911		}
912
913		/**
914		* awaitNanos is interruptible
915		*/
916	<	public void testAwaitNanos_Interrupt() {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
916	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
917	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918		final Condition c = lock.writeLock().newCondition();
919	<	Thread t = new Thread(new Runnable() {
920	<	public void run() {
921	<	try {
922	<	lock.writeLock().lock();
923	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
924	<	lock.writeLock().unlock();
925	<	threadShouldThrow();
926	<	}
927	<	catch(InterruptedException success) {
928	<	}
929	<	}
930	<	});
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	<	}
919	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
920	>	public void realRun() throws InterruptedException {
921	>	lock.writeLock().lock();
922	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
923	>	lock.writeLock().unlock();
924	>	}});
925	>
926	>	t.start();
927	>	Thread.sleep(SHORT_DELAY_MS);
928	>	t.interrupt();
929	>	t.join(SHORT_DELAY_MS);
930	>	assertFalse(t.isAlive());
931		}
932
933		/**
934		* awaitUntil is interruptible
935		*/
936	<	public void testAwaitUntil_Interrupt() {
937	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
936	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
937	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938		final Condition c = lock.writeLock().newCondition();
939	<	Thread t = new Thread(new Runnable() {
940	<	public void run() {
941	<	try {
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	<	threadShouldThrow();
947	<	}
948	<	catch(InterruptedException success) {
949	<	}
950	<	}
951	<	});
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	<	}
939	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
940	>	public void realRun() throws InterruptedException {
941	>	lock.writeLock().lock();
942	>	java.util.Date d = new java.util.Date();
943	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
944	>	lock.writeLock().unlock();
945	>	}});
946	>
947	>	t.start();
948	>	Thread.sleep(SHORT_DELAY_MS);
949	>	t.interrupt();
950	>	t.join(SHORT_DELAY_MS);
951	>	assertFalse(t.isAlive());
952		}
953
954		/**
955		* signalAll wakes up all threads
956		*/
957	<	public void testSignalAll() {
958	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
957	>	public void testSignalAll() throws InterruptedException {
958	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
959		final Condition c = lock.writeLock().newCondition();
960	<	Thread t1 = new Thread(new Runnable() {
961	<	public void run() {
962	<	try {
963	<	lock.writeLock().lock();
964	<	c.await();
965	<	lock.writeLock().unlock();
966	<	}
967	<	catch(InterruptedException e) {
968	<	threadUnexpectedException();
969	<	}
970	<	}
971	<	});
972	<
973	<	Thread t2 = new Thread(new Runnable() {
974	<	public void run() {
975	<	try {
976	<	lock.writeLock().lock();
977	<	c.await();
978	<	lock.writeLock().unlock();
979	<	}
980	<	catch(InterruptedException e) {
981	<	threadUnexpectedException();
982	<	}
983	<	}
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	<	}
960	>	Thread t1 = new Thread(new CheckedRunnable() {
961	>	public void realRun() throws InterruptedException {
962	>	lock.writeLock().lock();
963	>	c.await();
964	>	lock.writeLock().unlock();
965	>	}});
966	>
967	>	Thread t2 = new Thread(new CheckedRunnable() {
968	>	public void realRun() throws InterruptedException {
969	>	lock.writeLock().lock();
970	>	c.await();
971	>	lock.writeLock().unlock();
972	>	}});
973	>
974	>	t1.start();
975	>	t2.start();
976	>	Thread.sleep(SHORT_DELAY_MS);
977	>	lock.writeLock().lock();
978	>	c.signalAll();
979	>	lock.writeLock().unlock();
980	>	t1.join(SHORT_DELAY_MS);
981	>	t2.join(SHORT_DELAY_MS);
982	>	assertFalse(t1.isAlive());
983	>	assertFalse(t2.isAlive());
984		}
985
986		/**
987		* A serialized lock deserializes as unlocked
988		*/
989	<	public void testSerialization() {
989	>	public void testSerialization() throws Exception {
990		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
991		l.readLock().lock();
992		l.readLock().unlock();
993
994	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
995	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
996	+	out.writeObject(l);
997	+	out.close();
998	+
999	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1000	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1001	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1002	+	r.readLock().lock();
1003	+	r.readLock().unlock();
1004	+	}
1005	+
1006	+	/**
1007	+	* hasQueuedThreads reports whether there are waiting threads
1008	+	*/
1009	+	public void testhasQueuedThreads() throws InterruptedException {
1010	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1011	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1012	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1013	+	assertFalse(lock.hasQueuedThreads());
1014	+	lock.writeLock().lock();
1015	+	t1.start();
1016	+	Thread.sleep(SHORT_DELAY_MS);
1017	+	assertTrue(lock.hasQueuedThreads());
1018	+	t2.start();
1019	+	Thread.sleep(SHORT_DELAY_MS);
1020	+	assertTrue(lock.hasQueuedThreads());
1021	+	t1.interrupt();
1022	+	Thread.sleep(SHORT_DELAY_MS);
1023	+	assertTrue(lock.hasQueuedThreads());
1024	+	lock.writeLock().unlock();
1025	+	Thread.sleep(SHORT_DELAY_MS);
1026	+	assertFalse(lock.hasQueuedThreads());
1027	+	t1.join();
1028	+	t2.join();
1029	+	}
1030	+
1031	+	/**
1032	+	* hasQueuedThread(null) throws NPE
1033	+	*/
1034	+	public void testHasQueuedThreadNPE() {
1035	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1036		try {
1037	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1038	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1039	<	out.writeObject(l);
1040	<	out.close();
1041	<
1042	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1043	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1044	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1045	<	r.readLock().lock();
1046	<	r.readLock().unlock();
1047	<	} catch(Exception e){
1048	<	e.printStackTrace();
1049	<	unexpectedException();
1050	<	}
1037	>	sync.hasQueuedThread(null);
1038	>	shouldThrow();
1039	>	} catch (NullPointerException success) {}
1040	>	}
1041	>
1042	>	/**
1043	>	* hasQueuedThread reports whether a thread is queued.
1044	>	*/
1045	>	public void testHasQueuedThread() throws InterruptedException {
1046	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1047	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1048	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1049	>	assertFalse(sync.hasQueuedThread(t1));
1050	>	assertFalse(sync.hasQueuedThread(t2));
1051	>	sync.writeLock().lock();
1052	>	t1.start();
1053	>	Thread.sleep(SHORT_DELAY_MS);
1054	>	assertTrue(sync.hasQueuedThread(t1));
1055	>	t2.start();
1056	>	Thread.sleep(SHORT_DELAY_MS);
1057	>	assertTrue(sync.hasQueuedThread(t1));
1058	>	assertTrue(sync.hasQueuedThread(t2));
1059	>	t1.interrupt();
1060	>	Thread.sleep(SHORT_DELAY_MS);
1061	>	assertFalse(sync.hasQueuedThread(t1));
1062	>	assertTrue(sync.hasQueuedThread(t2));
1063	>	sync.writeLock().unlock();
1064	>	Thread.sleep(SHORT_DELAY_MS);
1065	>	assertFalse(sync.hasQueuedThread(t1));
1066	>	Thread.sleep(SHORT_DELAY_MS);
1067	>	assertFalse(sync.hasQueuedThread(t2));
1068	>	t1.join();
1069	>	t2.join();
1070		}
1071
1072	+
1073		/**
1074		* getQueueLength reports number of waiting threads
1075		*/
1076	<	public void testGetQueueLength() {
1077	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1076	>	public void testGetQueueLength() throws InterruptedException {
1077	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1078		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1079		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1080	<	try {
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();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1080	>	assertEquals(0, lock.getQueueLength());
1081	>	lock.writeLock().lock();
1082	>	t1.start();
1083	>	Thread.sleep(SHORT_DELAY_MS);
1084	>	assertEquals(1, lock.getQueueLength());
1085	>	t2.start();
1086	>	Thread.sleep(SHORT_DELAY_MS);
1087	>	assertEquals(2, lock.getQueueLength());
1088	>	t1.interrupt();
1089	>	Thread.sleep(SHORT_DELAY_MS);
1090	>	assertEquals(1, lock.getQueueLength());
1091	>	lock.writeLock().unlock();
1092	>	Thread.sleep(SHORT_DELAY_MS);
1093	>	assertEquals(0, lock.getQueueLength());
1094	>	t1.join();
1095	>	t2.join();
1096	>	}
1097
1098		/**
1099		* getQueuedThreads includes waiting threads
1100		*/
1101	<	public void testGetQueuedThreads() {
1102	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1101	>	public void testGetQueuedThreads() throws InterruptedException {
1102	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1103		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1104		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1105	+	assertTrue(lock.getQueuedThreads().isEmpty());
1106	+	lock.writeLock().lock();
1107	+	assertTrue(lock.getQueuedThreads().isEmpty());
1108	+	t1.start();
1109	+	Thread.sleep(SHORT_DELAY_MS);
1110	+	assertTrue(lock.getQueuedThreads().contains(t1));
1111	+	t2.start();
1112	+	Thread.sleep(SHORT_DELAY_MS);
1113	+	assertTrue(lock.getQueuedThreads().contains(t1));
1114	+	assertTrue(lock.getQueuedThreads().contains(t2));
1115	+	t1.interrupt();
1116	+	Thread.sleep(SHORT_DELAY_MS);
1117	+	assertFalse(lock.getQueuedThreads().contains(t1));
1118	+	assertTrue(lock.getQueuedThreads().contains(t2));
1119	+	lock.writeLock().unlock();
1120	+	Thread.sleep(SHORT_DELAY_MS);
1121	+	assertTrue(lock.getQueuedThreads().isEmpty());
1122	+	t1.join();
1123	+	t2.join();
1124	+	}
1125	+
1126	+	/**
1127	+	* hasWaiters throws NPE if null
1128	+	*/
1129	+	public void testHasWaitersNPE() {
1130	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1131		try {
1132	<	assertTrue(lock.getQueuedThreads().isEmpty());
1133	<	lock.writeLock().lock();
1134	<	assertTrue(lock.getQueuedThreads().isEmpty());
1135	<	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	<	}
1132	>	lock.hasWaiters(null);
1133	>	shouldThrow();
1134	>	} catch (NullPointerException success) {}
1135	>	}
1136
1137		/**
1138	<	* hasWaiters returns true when a thread is waiting, else false
1138	>	* getWaitQueueLength throws NPE if null
1139		*/
1140	<	public void testHasWaiters() {
1141	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1142	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1143	<	Thread t = new Thread(new Runnable() {
1144	<	public void run() {
1145	<	try {
1146	<	lock.writeLock().lock();
1147	<	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	<	});
1140	>	public void testGetWaitQueueLengthNPE() {
1141	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1142	>	try {
1143	>	lock.getWaitQueueLength(null);
1144	>	shouldThrow();
1145	>	} catch (NullPointerException success) {}
1146	>	}
1147	>
1148
1149	+	/**
1150	+	* getWaitingThreads throws NPE if null
1151	+	*/
1152	+	public void testGetWaitingThreadsNPE() {
1153	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1154		try {
1155	<	t.start();
1156	<	Thread.sleep(SHORT_DELAY_MS);
1157	<	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	<	}
1155	>	lock.getWaitingThreads(null);
1156	>	shouldThrow();
1157	>	} catch (NullPointerException success) {}
1158		}
1159
1160		/**
1161	<	* getWaitQueueLength returns number of waiting threads
1161	>	* hasWaiters throws IAE if not owned
1162		*/
1163	<	public void testGetWaitQueueLength() {
1164	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1165	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1166	<	Thread t1 = new Thread(new Runnable() {
1167	<	public void run() {
1168	<	try {
1169	<	lock.writeLock().lock();
1170	<	threadAssertFalse(c.hasWaiters());
1171	<	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	<	});
1163	>	public void testHasWaitersIAE() {
1164	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1165	>	final Condition c = lock.writeLock().newCondition();
1166	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1167	>	try {
1168	>	lock2.hasWaiters(c);
1169	>	shouldThrow();
1170	>	} catch (IllegalArgumentException success) {}
1171	>	}
1172
1173	+	/**
1174	+	* hasWaiters throws IMSE if not locked
1175	+	*/
1176	+	public void testHasWaitersIMSE() {
1177	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1178	+	final Condition c = lock.writeLock().newCondition();
1179		try {
1180	<	t1.start();
1181	<	Thread.sleep(SHORT_DELAY_MS);
1182	<	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	<	}
1180	>	lock.hasWaiters(c);
1181	>	shouldThrow();
1182	>	} catch (IllegalMonitorStateException success) {}
1183		}
1184
1185	+
1186		/**
1187	<	* getWaitingThreads returns only and all waiting threads
1187	>	* getWaitQueueLength throws IAE if not owned
1188	>	*/
1189	>	public void testGetWaitQueueLengthIAE() {
1190	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1191	>	final Condition c = lock.writeLock().newCondition();
1192	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1193	>	try {
1194	>	lock2.getWaitQueueLength(c);
1195	>	shouldThrow();
1196	>	} catch (IllegalArgumentException success) {}
1197	>	}
1198	>
1199	>	/**
1200	>	* getWaitQueueLength throws IMSE if not locked
1201		*/
1202	<	public void testGetWaitingThreads() {
1203	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1204	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1205	<	Thread t1 = new Thread(new Runnable() {
1206	<	public void run() {
1207	<	try {
1208	<	lock.writeLock().lock();
1209	<	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	<	});
1202	>	public void testGetWaitQueueLengthIMSE() {
1203	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1204	>	final Condition c = lock.writeLock().newCondition();
1205	>	try {
1206	>	lock.getWaitQueueLength(c);
1207	>	shouldThrow();
1208	>	} catch (IllegalMonitorStateException success) {}
1209	>	}
1210
1211	+
1212	+	/**
1213	+	* getWaitingThreads throws IAE if not owned
1214	+	*/
1215	+	public void testGetWaitingThreadsIAE() {
1216	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1217	+	final Condition c = lock.writeLock().newCondition();
1218	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1219		try {
1220	<	lock.writeLock().lock();
1221	<	assertTrue(c.getWaitingThreads().isEmpty());
1222	<	lock.writeLock().unlock();
1223	<	t1.start();
1224	<	Thread.sleep(SHORT_DELAY_MS);
1225	<	t2.start();
1226	<	Thread.sleep(SHORT_DELAY_MS);
1227	<	lock.writeLock().lock();
1228	<	assertTrue(c.hasWaiters());
1229	<	assertTrue(c.getWaitingThreads().contains(t1));
1230	<	assertTrue(c.getWaitingThreads().contains(t2));
1231	<	c.signalAll();
1232	<	lock.writeLock().unlock();
1233	<	Thread.sleep(SHORT_DELAY_MS);
1234	<	lock.writeLock().lock();
1235	<	assertFalse(c.hasWaiters());
1236	<	assertTrue(c.getWaitingThreads().isEmpty());
1237	<	lock.writeLock().unlock();
1238	<	t1.join(SHORT_DELAY_MS);
1239	<	t2.join(SHORT_DELAY_MS);
1240	<	assertFalse(t1.isAlive());
1241	<	assertFalse(t2.isAlive());
1242	<	}
1243	<	catch (Exception ex) {
1244	<	unexpectedException();
1245	<	}
1220	>	lock2.getWaitingThreads(c);
1221	>	shouldThrow();
1222	>	} catch (IllegalArgumentException success) {}
1223	>	}
1224	>
1225	>	/**
1226	>	* getWaitingThreads throws IMSE if not locked
1227	>	*/
1228	>	public void testGetWaitingThreadsIMSE() {
1229	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1230	>	final Condition c = lock.writeLock().newCondition();
1231	>	try {
1232	>	lock.getWaitingThreads(c);
1233	>	shouldThrow();
1234	>	} catch (IllegalMonitorStateException success) {}
1235	>	}
1236	>
1237	>
1238	>	/**
1239	>	* hasWaiters returns true when a thread is waiting, else false
1240	>	*/
1241	>	public void testHasWaiters() throws InterruptedException {
1242	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1243	>	final Condition c = lock.writeLock().newCondition();
1244	>	Thread t = new Thread(new CheckedRunnable() {
1245	>	public void realRun() throws InterruptedException {
1246	>	lock.writeLock().lock();
1247	>	threadAssertFalse(lock.hasWaiters(c));
1248	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1249	>	c.await();
1250	>	lock.writeLock().unlock();
1251	>	}});
1252	>
1253	>	t.start();
1254	>	Thread.sleep(SHORT_DELAY_MS);
1255	>	lock.writeLock().lock();
1256	>	assertTrue(lock.hasWaiters(c));
1257	>	assertEquals(1, lock.getWaitQueueLength(c));
1258	>	c.signal();
1259	>	lock.writeLock().unlock();
1260	>	Thread.sleep(SHORT_DELAY_MS);
1261	>	lock.writeLock().lock();
1262	>	assertFalse(lock.hasWaiters(c));
1263	>	assertEquals(0, lock.getWaitQueueLength(c));
1264	>	lock.writeLock().unlock();
1265	>	t.join(SHORT_DELAY_MS);
1266	>	assertFalse(t.isAlive());
1267	>	}
1268	>
1269	>	/**
1270	>	* getWaitQueueLength returns number of waiting threads
1271	>	*/
1272	>	public void testGetWaitQueueLength() throws InterruptedException {
1273	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1274	>	final Condition c = lock.writeLock().newCondition();
1275	>	Thread t = new Thread(new CheckedRunnable() {
1276	>	public void realRun() throws InterruptedException {
1277	>	lock.writeLock().lock();
1278	>	threadAssertFalse(lock.hasWaiters(c));
1279	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1280	>	c.await();
1281	>	lock.writeLock().unlock();
1282	>	}});
1283	>
1284	>	t.start();
1285	>	Thread.sleep(SHORT_DELAY_MS);
1286	>	lock.writeLock().lock();
1287	>	assertTrue(lock.hasWaiters(c));
1288	>	assertEquals(1, lock.getWaitQueueLength(c));
1289	>	c.signal();
1290	>	lock.writeLock().unlock();
1291	>	Thread.sleep(SHORT_DELAY_MS);
1292	>	lock.writeLock().lock();
1293	>	assertFalse(lock.hasWaiters(c));
1294	>	assertEquals(0, lock.getWaitQueueLength(c));
1295	>	lock.writeLock().unlock();
1296	>	t.join(SHORT_DELAY_MS);
1297	>	assertFalse(t.isAlive());
1298	>	}
1299	>
1300	>
1301	>	/**
1302	>	* getWaitingThreads returns only and all waiting threads
1303	>	*/
1304	>	public void testGetWaitingThreads() throws InterruptedException {
1305	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1306	>	final Condition c = lock.writeLock().newCondition();
1307	>	Thread t1 = new Thread(new CheckedRunnable() {
1308	>	public void realRun() throws InterruptedException {
1309	>	lock.writeLock().lock();
1310	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1311	>	c.await();
1312	>	lock.writeLock().unlock();
1313	>	}});
1314	>
1315	>	Thread t2 = new Thread(new CheckedRunnable() {
1316	>	public void realRun() throws InterruptedException {
1317	>	lock.writeLock().lock();
1318	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1319	>	c.await();
1320	>	lock.writeLock().unlock();
1321	>	}});
1322	>
1323	>	lock.writeLock().lock();
1324	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1325	>	lock.writeLock().unlock();
1326	>	t1.start();
1327	>	Thread.sleep(SHORT_DELAY_MS);
1328	>	t2.start();
1329	>	Thread.sleep(SHORT_DELAY_MS);
1330	>	lock.writeLock().lock();
1331	>	assertTrue(lock.hasWaiters(c));
1332	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1333	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1334	>	c.signalAll();
1335	>	lock.writeLock().unlock();
1336	>	Thread.sleep(SHORT_DELAY_MS);
1337	>	lock.writeLock().lock();
1338	>	assertFalse(lock.hasWaiters(c));
1339	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1340	>	lock.writeLock().unlock();
1341	>	t1.join(SHORT_DELAY_MS);
1342	>	t2.join(SHORT_DELAY_MS);
1343	>	assertFalse(t1.isAlive());
1344	>	assertFalse(t2.isAlive());
1345	>	}
1346	>
1347	>	/**
1348	>	* toString indicates current lock state
1349	>	*/
1350	>	public void testToString() {
1351	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1352	>	String us = lock.toString();
1353	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1354	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1355	>	lock.writeLock().lock();
1356	>	String ws = lock.toString();
1357	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1358	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1359	>	lock.writeLock().unlock();
1360	>	lock.readLock().lock();
1361	>	lock.readLock().lock();
1362	>	String rs = lock.toString();
1363	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1364	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1365	>	}
1366	>
1367	>	/**
1368	>	* readLock.toString indicates current lock state
1369	>	*/
1370	>	public void testReadLockToString() {
1371	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1372	>	String us = lock.readLock().toString();
1373	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1374	>	lock.readLock().lock();
1375	>	lock.readLock().lock();
1376	>	String rs = lock.readLock().toString();
1377	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1378	>	}
1379	>
1380	>	/**
1381	>	* writeLock.toString indicates current lock state
1382	>	*/
1383	>	public void testWriteLockToString() {
1384	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1385	>	String us = lock.writeLock().toString();
1386	>	assertTrue(us.indexOf("Unlocked") >= 0);
1387	>	lock.writeLock().lock();
1388	>	String ls = lock.writeLock().toString();
1389	>	assertTrue(ls.indexOf("Locked") >= 0);
1390		}
1391
1392		}

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