ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.18 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.38 by jsr166, Sat Nov 21 21:59:50 2009 UTC

#	Line 2 | Line 2
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.
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 {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 38 | 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 {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<	public Collection<Thread> getWaitingThreads(Condition c) {
57	<	return super.getWaitingThreads(c);
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
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.getReadLockCount());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
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	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
88		assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
93		assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
#	Line 103 | Line 105 | public class ReentrantReadWriteLockTest
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	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
114		assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
119		assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
#	Line 126 | Line 130 | public class ReentrantReadWriteLockTest
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		}
159	<
159	>
160	>	/**
161	>	* getReadHoldCount returns number of recursive holds
162	>	*/
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-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testUnlock_IllegalMonitorStateException() {
180	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	<	try {
182	<	rl.writeLock().unlock();
183	<	shouldThrow();
184	<	} catch(IllegalMonitorStateException success){}
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	>	try {
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185		}
186
187
188		/**
189		* write-lockInterruptibly is interruptible
190		*/
191	<	public void testWriteLockInterruptibly_Interrupted() {
192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	<	Thread t = new Thread(new Runnable() {
194	<	public void run() {
195	<	try {
196	<	lock.writeLock().lockInterruptibly();
197	<	lock.writeLock().unlock();
198	<	lock.writeLock().lockInterruptibly();
199	<	lock.writeLock().unlock();
200	<	} catch(InterruptedException success){}
201	<	}
202	<	});
203	<	try {
204	<	lock.writeLock().lock();
205	<	t.start();
206	<	t.interrupt();
207	<	lock.writeLock().unlock();
208	<	t.join();
175	<	} catch(Exception e){
176	<	unexpectedException();
177	<	}
178	<	}
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() {
214	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	<	lock.writeLock().lock();
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	try {
219	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
220	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
225	<	t.interrupt();
196	<	lock.writeLock().unlock();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
200	<	}
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(SMALL_DELAY_MS, MILLISECONDS);
219	>	}});
220	>
221	>	t.start();
222	>	Thread.sleep(SHORT_DELAY_MS);
223	>	t.interrupt();
224	>	lock.writeLock().unlock();
225	>	t.join();
226		}
227
228		/**
229		* read-lockInterruptibly is interruptible
230		*/
231	<	public void testReadLockInterruptibly_Interrupted() {
232	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	<	lock.writeLock().lock();
234	<	Thread t = new Thread(new Runnable() {
235	<	public void run() {
236	<	try {
237	<	lock.readLock().lockInterruptibly();
238	<	} catch(InterruptedException success){}
239	<	}
240	<	});
241	<	try {
242	<	t.start();
243	<	t.interrupt();
244	<	lock.writeLock().unlock();
245	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
231	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
232	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	lock.writeLock().lock();
234	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
235	>	public void realRun() throws InterruptedException {
236	>	lock.readLock().lockInterruptibly();
237	>	}});
238	>
239	>	t.start();
240	>	Thread.sleep(SHORT_DELAY_MS);
241	>	t.interrupt();
242	>	Thread.sleep(SHORT_DELAY_MS);
243	>	lock.writeLock().unlock();
244	>	t.join();
245	>	}
246
247		/**
248		* timed read-tryLock is interruptible
249		*/
250	<	public void testReadTryLock_Interrupted() {
251	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
252	<	lock.writeLock().lock();
253	<	Thread t = new Thread(new Runnable() {
254	<	public void run() {
255	<	try {
256	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
257	<	threadShouldThrow();
258	<	} catch(InterruptedException success){}
259	<	}
260	<	});
240	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
250	>	public void testReadTryLock_Interrupted() throws InterruptedException {
251	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
252	>	lock.writeLock().lock();
253	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
254	>	public void realRun() throws InterruptedException {
255	>	lock.readLock().tryLock(1000,MILLISECONDS);
256	>	}});
257	>
258	>	t.start();
259	>	t.interrupt();
260	>	t.join();
261		}
262
263	<
263	>
264		/**
265		* write-tryLock fails if locked
266		*/
267	<	public void testWriteTryLockWhenLocked() {
268	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
269	<	lock.writeLock().lock();
270	<	Thread t = new Thread(new Runnable() {
271	<	public void run() {
272	<	threadAssertFalse(lock.writeLock().tryLock());
273	<	}
274	<	});
275	<	try {
276	<	t.start();
277	<	t.join();
278	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
267	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
269	>	lock.writeLock().lock();
270	>	Thread t = new Thread(new CheckedRunnable() {
271	>	public void realRun() {
272	>	threadAssertFalse(lock.writeLock().tryLock());
273	>	}});
274	>
275	>	t.start();
276	>	t.join();
277	>	lock.writeLock().unlock();
278	>	}
279
280		/**
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() {
287	<	public void run() {
288	<	threadAssertFalse(lock.readLock().tryLock());
289	<	}
290	<	});
291	<	try {
292	<	t.start();
293	<	t.join();
294	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
283	>	public void testReadTryLockWhenLocked() throws InterruptedException {
284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	>	lock.writeLock().lock();
286	>	Thread t = new Thread(new CheckedRunnable() {
287	>	public void realRun() {
288	>	threadAssertFalse(lock.readLock().tryLock());
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() {
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();
306	<	} catch(Exception e){
307	<	unexpectedException();
308	<	}
309	<	}
299	>	public void testMultipleReadLocks() throws InterruptedException {
300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	>	lock.readLock().lock();
302	>	Thread t = new Thread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	threadAssertTrue(lock.readLock().tryLock());
305	>	lock.readLock().unlock();
306	>	}});
307	>
308	>	t.start();
309	>	t.join();
310	>	lock.readLock().unlock();
311	>	}
312
313		/**
314		* A writelock succeeds after reading threads unlock
315		*/
316	<	public void testWriteAfterMultipleReadLocks() {
317	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
318	<	lock.readLock().lock();
319	<	Thread t1 = new Thread(new Runnable() {
320	<	public void run() {
321	<	lock.readLock().lock();
322	<	lock.readLock().unlock();
323	<	}
324	<	});
325	<	Thread t2 = new Thread(new Runnable() {
326	<	public void run() {
327	<	lock.writeLock().lock();
328	<	lock.writeLock().unlock();
329	<	}
330	<	});
331	<
332	<	try {
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);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
316	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
317	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
318	>	lock.readLock().lock();
319	>	Thread t1 = new Thread(new CheckedRunnable() {
320	>	public void realRun() {
321	>	lock.readLock().lock();
322	>	lock.readLock().unlock();
323	>	}});
324	>	Thread t2 = new Thread(new CheckedRunnable() {
325	>	public void realRun() {
326	>	lock.writeLock().lock();
327	>	lock.writeLock().unlock();
328	>	}});
329	>
330	>	t1.start();
331	>	t2.start();
332	>	Thread.sleep(SHORT_DELAY_MS);
333	>	lock.readLock().unlock();
334	>	t1.join(MEDIUM_DELAY_MS);
335	>	t2.join(MEDIUM_DELAY_MS);
336	>	assertTrue(!t1.isAlive());
337	>	assertTrue(!t2.isAlive());
338	>	}
339
340		/**
341		* Readlocks succeed after a writing thread unlocks
342		*/
343	<	public void testReadAfterWriteLock() {
344	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
345	<	lock.writeLock().lock();
346	<	Thread t1 = new Thread(new Runnable() {
347	<	public void run() {
348	<	lock.readLock().lock();
349	<	lock.readLock().unlock();
350	<	}
351	<	});
352	<	Thread t2 = new Thread(new Runnable() {
353	<	public void run() {
354	<	lock.readLock().lock();
355	<	lock.readLock().unlock();
356	<	}
357	<	});
358	<
359	<	try {
360	<	t1.start();
361	<	t2.start();
362	<	Thread.sleep(SHORT_DELAY_MS);
363	<	lock.writeLock().unlock();
364	<	t1.join(MEDIUM_DELAY_MS);
365	<	t2.join(MEDIUM_DELAY_MS);
366	<	assertTrue(!t1.isAlive());
367	<	assertTrue(!t2.isAlive());
368	<
369	<	} catch(Exception e){
370	<	unexpectedException();
371	<	}
372	<	}
343	>	public void testReadAfterWriteLock() throws InterruptedException {
344	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
345	>	lock.writeLock().lock();
346	>	Thread t1 = new Thread(new CheckedRunnable() {
347	>	public void realRun() {
348	>	lock.readLock().lock();
349	>	lock.readLock().unlock();
350	>	}});
351	>	Thread t2 = new Thread(new CheckedRunnable() {
352	>	public void realRun() {
353	>	lock.readLock().lock();
354	>	lock.readLock().unlock();
355	>	}});
356	>
357	>	t1.start();
358	>	t2.start();
359	>	Thread.sleep(SHORT_DELAY_MS);
360	>	lock.writeLock().unlock();
361	>	t1.join(MEDIUM_DELAY_MS);
362	>	t2.join(MEDIUM_DELAY_MS);
363	>	assertTrue(!t1.isAlive());
364	>	assertTrue(!t2.isAlive());
365	>	}
366	>
367	>	/**
368	>	* Read trylock succeeds if write locked by current thread
369	>	*/
370	>	public void testReadHoldingWriteLock() {
371	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
372	>	lock.writeLock().lock();
373	>	assertTrue(lock.readLock().tryLock());
374	>	lock.readLock().unlock();
375	>	lock.writeLock().unlock();
376	>	}
377	>
378	>	/**
379	>	* Read lock succeeds if write locked by current thread even if
380	>	* other threads are waiting for readlock
381	>	*/
382	>	public void testReadHoldingWriteLock2() throws InterruptedException {
383	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
384	>	lock.writeLock().lock();
385	>	Thread t1 = new Thread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	lock.readLock().lock();
388	>	lock.readLock().unlock();
389	>	}});
390	>	Thread t2 = new Thread(new CheckedRunnable() {
391	>	public void realRun() {
392	>	lock.readLock().lock();
393	>	lock.readLock().unlock();
394	>	}});
395	>
396	>	t1.start();
397	>	t2.start();
398	>	lock.readLock().lock();
399	>	lock.readLock().unlock();
400	>	Thread.sleep(SHORT_DELAY_MS);
401	>	lock.readLock().lock();
402	>	lock.readLock().unlock();
403	>	lock.writeLock().unlock();
404	>	t1.join(MEDIUM_DELAY_MS);
405	>	t2.join(MEDIUM_DELAY_MS);
406	>	assertTrue(!t1.isAlive());
407	>	assertTrue(!t2.isAlive());
408	>	}
409	>
410	>	/**
411	>	*  Read lock succeeds if write locked by current thread even if
412	>	* other threads are waiting for writelock
413	>	*/
414	>	public void testReadHoldingWriteLock3() throws InterruptedException {
415	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
416	>	lock.writeLock().lock();
417	>	Thread t1 = new Thread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	lock.writeLock().lock();
420	>	lock.writeLock().unlock();
421	>	}});
422	>	Thread t2 = new Thread(new CheckedRunnable() {
423	>	public void realRun() {
424	>	lock.writeLock().lock();
425	>	lock.writeLock().unlock();
426	>	}});
427	>
428	>	t1.start();
429	>	t2.start();
430	>	lock.readLock().lock();
431	>	lock.readLock().unlock();
432	>	Thread.sleep(SHORT_DELAY_MS);
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	lock.writeLock().unlock();
436	>	t1.join(MEDIUM_DELAY_MS);
437	>	t2.join(MEDIUM_DELAY_MS);
438	>	assertTrue(!t1.isAlive());
439	>	assertTrue(!t2.isAlive());
440	>	}
441	>
442	>
443	>	/**
444	>	*  Write lock succeeds if write locked by current thread even if
445	>	* other threads are waiting for writelock
446	>	*/
447	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
448	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
449	>	lock.writeLock().lock();
450	>	Thread t1 = new Thread(new CheckedRunnable() {
451	>	public void realRun() {
452	>	lock.writeLock().lock();
453	>	lock.writeLock().unlock();
454	>	}});
455	>	Thread t2 = new Thread(new CheckedRunnable() {
456	>	public void realRun() {
457	>	lock.writeLock().lock();
458	>	lock.writeLock().unlock();
459	>	}});
460	>
461	>	t1.start();
462	>	t2.start();
463	>	lock.writeLock().lock();
464	>	lock.writeLock().unlock();
465	>	Thread.sleep(SHORT_DELAY_MS);
466	>	lock.writeLock().lock();
467	>	lock.writeLock().unlock();
468	>	lock.writeLock().unlock();
469	>	t1.join(MEDIUM_DELAY_MS);
470	>	t2.join(MEDIUM_DELAY_MS);
471	>	assertTrue(!t1.isAlive());
472	>	assertTrue(!t2.isAlive());
473	>	}
474	>
475	>
476	>	/**
477	>	* Fair Read trylock succeeds if write locked by current thread
478	>	*/
479	>	public void testReadHoldingWriteLockFair() {
480	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
481	>	lock.writeLock().lock();
482	>	assertTrue(lock.readLock().tryLock());
483	>	lock.readLock().unlock();
484	>	lock.writeLock().unlock();
485	>	}
486	>
487	>	/**
488	>	* Fair Read lock succeeds if write locked by current thread even if
489	>	* other threads are waiting for readlock
490	>	*/
491	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
492	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
493	>	lock.writeLock().lock();
494	>	Thread t1 = new Thread(new CheckedRunnable() {
495	>	public void realRun() {
496	>	lock.readLock().lock();
497	>	lock.readLock().unlock();
498	>	}});
499	>	Thread t2 = new Thread(new CheckedRunnable() {
500	>	public void realRun() {
501	>	lock.readLock().lock();
502	>	lock.readLock().unlock();
503	>	}});
504	>
505	>	t1.start();
506	>	t2.start();
507	>	lock.readLock().lock();
508	>	lock.readLock().unlock();
509	>	Thread.sleep(SHORT_DELAY_MS);
510	>	lock.readLock().lock();
511	>	lock.readLock().unlock();
512	>	lock.writeLock().unlock();
513	>	t1.join(MEDIUM_DELAY_MS);
514	>	t2.join(MEDIUM_DELAY_MS);
515	>	assertTrue(!t1.isAlive());
516	>	assertTrue(!t2.isAlive());
517	>	}
518	>
519	>
520	>	/**
521	>	* Fair Read lock succeeds if write locked by current thread even if
522	>	* other threads are waiting for writelock
523	>	*/
524	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
525	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
526	>	lock.writeLock().lock();
527	>	Thread t1 = new Thread(new CheckedRunnable() {
528	>	public void realRun() {
529	>	lock.writeLock().lock();
530	>	lock.writeLock().unlock();
531	>	}});
532	>	Thread t2 = new Thread(new CheckedRunnable() {
533	>	public void realRun() {
534	>	lock.writeLock().lock();
535	>	lock.writeLock().unlock();
536	>	}});
537	>
538	>	t1.start();
539	>	t2.start();
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	Thread.sleep(SHORT_DELAY_MS);
543	>	lock.readLock().lock();
544	>	lock.readLock().unlock();
545	>	lock.writeLock().unlock();
546	>	t1.join(MEDIUM_DELAY_MS);
547	>	t2.join(MEDIUM_DELAY_MS);
548	>	assertTrue(!t1.isAlive());
549	>	assertTrue(!t2.isAlive());
550	>	}
551	>
552	>
553	>	/**
554	>	* Fair Write lock succeeds if write locked by current thread even if
555	>	* other threads are waiting for writelock
556	>	*/
557	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
558	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
559	>	lock.writeLock().lock();
560	>	Thread t1 = new Thread(new CheckedRunnable() {
561	>	public void realRun() {
562	>	lock.writeLock().lock();
563	>	lock.writeLock().unlock();
564	>	}});
565	>	Thread t2 = new Thread(new CheckedRunnable() {
566	>	public void realRun() {
567	>	lock.writeLock().lock();
568	>	lock.writeLock().unlock();
569	>	}});
570	>
571	>	t1.start();
572	>	t2.start();
573	>	Thread.sleep(SHORT_DELAY_MS);
574	>	assertTrue(lock.isWriteLockedByCurrentThread());
575	>	assertTrue(lock.getWriteHoldCount() == 1);
576	>	lock.writeLock().lock();
577	>	assertTrue(lock.getWriteHoldCount() == 2);
578	>	lock.writeLock().unlock();
579	>	lock.writeLock().lock();
580	>	lock.writeLock().unlock();
581	>	lock.writeLock().unlock();
582	>	t1.join(MEDIUM_DELAY_MS);
583	>	t2.join(MEDIUM_DELAY_MS);
584	>	assertTrue(!t1.isAlive());
585	>	assertTrue(!t2.isAlive());
586	>	}
587
588
589		/**
590		* Read tryLock succeeds if readlocked but not writelocked
591		*/
592	<	public void testTryLockWhenReadLocked() {
593	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
594	<	lock.readLock().lock();
595	<	Thread t = new Thread(new Runnable() {
596	<	public void run() {
597	<	threadAssertTrue(lock.readLock().tryLock());
598	<	lock.readLock().unlock();
599	<	}
600	<	});
601	<	try {
602	<	t.start();
603	<	t.join();
604	<	lock.readLock().unlock();
605	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
592	>	public void testTryLockWhenReadLocked() throws InterruptedException {
593	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
594	>	lock.readLock().lock();
595	>	Thread t = new Thread(new CheckedRunnable() {
596	>	public void realRun() {
597	>	threadAssertTrue(lock.readLock().tryLock());
598	>	lock.readLock().unlock();
599	>	}});
600	>
601	>	t.start();
602	>	t.join();
603	>	lock.readLock().unlock();
604	>	}
605	>
606
401	–
607
608		/**
609		* write tryLock fails when readlocked
610		*/
611	<	public void testWriteTryLockWhenReadLocked() {
612	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
613	<	lock.readLock().lock();
614	<	Thread t = new Thread(new Runnable() {
615	<	public void run() {
616	<	threadAssertFalse(lock.writeLock().tryLock());
617	<	}
618	<	});
619	<	try {
620	<	t.start();
621	<	t.join();
622	<	lock.readLock().unlock();
623	<	} catch(Exception e){
624	<	unexpectedException();
625	<	}
626	<	}
611	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
612	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
613	>	lock.readLock().lock();
614	>	Thread t = new Thread(new CheckedRunnable() {
615	>	public void realRun() {
616	>	threadAssertFalse(lock.writeLock().tryLock());
617	>	}});
618	>
619	>	t.start();
620	>	t.join();
621	>	lock.readLock().unlock();
622	>	}
623	>
624	>
625	>	/**
626	>	* Fair Read tryLock succeeds if readlocked but not writelocked
627	>	*/
628	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
629	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
630	>	lock.readLock().lock();
631	>	Thread t = new Thread(new CheckedRunnable() {
632	>	public void realRun() {
633	>	threadAssertTrue(lock.readLock().tryLock());
634	>	lock.readLock().unlock();
635	>	}});
636	>
637	>	t.start();
638	>	t.join();
639	>	lock.readLock().unlock();
640	>	}
641	>
642	>
643	>
644	>	/**
645	>	* Fair write tryLock fails when readlocked
646	>	*/
647	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
648	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
649	>	lock.readLock().lock();
650	>	Thread t = new Thread(new CheckedRunnable() {
651	>	public void realRun() {
652	>	threadAssertFalse(lock.writeLock().tryLock());
653	>	}});
654	>
655	>	t.start();
656	>	t.join();
657	>	lock.readLock().unlock();
658	>	}
659	>
660
423	–
661
662		/**
663		* write timed tryLock times out if locked
664		*/
665	<	public void testWriteTryLock_Timeout() {
666	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
667	<	lock.writeLock().lock();
668	<	Thread t = new Thread(new Runnable() {
669	<	public void run() {
670	<	try {
671	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
672	<	} catch (Exception ex) {
673	<	threadUnexpectedException();
674	<	}
675	<	}
676	<	});
677	<	try {
441	<	t.start();
442	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
665	>	public void testWriteTryLock_Timeout() throws InterruptedException {
666	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
667	>	lock.writeLock().lock();
668	>	Thread t = new Thread(new CheckedRunnable() {
669	>	public void realRun() throws InterruptedException {
670	>	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
671	>	}});
672	>
673	>	t.start();
674	>	t.join();
675	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
676	>	lock.writeLock().unlock();
677	>	}
678
679		/**
680		* read timed tryLock times out if write-locked
681		*/
682	<	public void testReadTryLock_Timeout() {
683	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
684	<	lock.writeLock().lock();
685	<	Thread t = new Thread(new Runnable() {
686	<	public void run() {
687	<	try {
688	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
689	<	} catch (Exception ex) {
690	<	threadUnexpectedException();
691	<	}
692	<	}
693	<	});
694	<	try {
465	<	t.start();
466	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
682	>	public void testReadTryLock_Timeout() throws InterruptedException {
683	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
684	>	lock.writeLock().lock();
685	>	Thread t = new Thread(new CheckedRunnable() {
686	>	public void realRun() throws InterruptedException {
687	>	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
688	>	}});
689	>
690	>	t.start();
691	>	t.join();
692	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
693	>	lock.writeLock().unlock();
694	>	}
695
696
697		/**
698		* write lockInterruptibly succeeds if lock free else is interruptible
699		*/
700	<	public void testWriteLockInterruptibly() {
701	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
702	<	try {
703	<	lock.writeLock().lockInterruptibly();
704	<	} catch(Exception e) {
705	<	unexpectedException();
706	<	}
707	<	Thread t = new Thread(new Runnable() {
708	<	public void run() {
709	<	try {
710	<	lock.writeLock().lockInterruptibly();
711	<	threadShouldThrow();
712	<	}
713	<	catch(InterruptedException success) {
491	<	}
492	<	}
493	<	});
494	<	try {
495	<	t.start();
496	<	t.interrupt();
497	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
700	>	public void testWriteLockInterruptibly() throws InterruptedException {
701	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
702	>	lock.writeLock().lockInterruptibly();
703	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
704	>	public void realRun() throws InterruptedException {
705	>	lock.writeLock().lockInterruptibly();
706	>	}});
707	>
708	>	t.start();
709	>	Thread.sleep(SHORT_DELAY_MS);
710	>	t.interrupt();
711	>	Thread.sleep(SHORT_DELAY_MS);
712	>	t.join();
713	>	lock.writeLock().unlock();
714		}
715
716		/**
717		*  read lockInterruptibly succeeds if lock free else is interruptible
718		*/
719	<	public void testReadLockInterruptibly() {
720	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	<	try {
722	<	lock.writeLock().lockInterruptibly();
723	<	} catch(Exception e) {
724	<	unexpectedException();
725	<	}
726	<	Thread t = new Thread(new Runnable() {
727	<	public void run() {
728	<	try {
729	<	lock.readLock().lockInterruptibly();
730	<	threadShouldThrow();
731	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
524	<	try {
525	<	t.start();
526	<	t.interrupt();
527	<	t.join();
528	<	lock.writeLock().unlock();
529	<	} catch(Exception e){
530	<	unexpectedException();
531	<	}
719	>	public void testReadLockInterruptibly() throws InterruptedException {
720	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	>	lock.writeLock().lockInterruptibly();
722	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
723	>	public void realRun() throws InterruptedException {
724	>	lock.readLock().lockInterruptibly();
725	>	}});
726	>
727	>	t.start();
728	>	Thread.sleep(SHORT_DELAY_MS);
729	>	t.interrupt();
730	>	t.join();
731	>	lock.writeLock().unlock();
732		}
733
734		/**
735		* Calling await without holding lock throws IllegalMonitorStateException
736		*/
737	<	public void testAwait_IllegalMonitor() {
738	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
737	>	public void testAwait_IllegalMonitor() throws InterruptedException {
738	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739		final Condition c = lock.writeLock().newCondition();
740		try {
741		c.await();
742		shouldThrow();
743	<	}
544	<	catch (IllegalMonitorStateException success) {
545	<	}
546	<	catch (Exception ex) {
547	<	shouldThrow();
548	<	}
743	>	} catch (IllegalMonitorStateException success) {}
744		}
745
746		/**
747		* Calling signal without holding lock throws IllegalMonitorStateException
748		*/
749		public void testSignal_IllegalMonitor() {
750	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
750	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
751		final Condition c = lock.writeLock().newCondition();
752		try {
753		c.signal();
754		shouldThrow();
755	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
755	>	} catch (IllegalMonitorStateException success) {}
756		}
757
758		/**
759		* awaitNanos without a signal times out
760		*/
761	<	public void testAwaitNanos_Timeout() {
762	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761	>	public void testAwaitNanos_Timeout() throws InterruptedException {
762	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
763		final Condition c = lock.writeLock().newCondition();
764	<	try {
765	<	lock.writeLock().lock();
766	<	long t = c.awaitNanos(100);
767	<	assertTrue(t <= 0);
768	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
764	>
765	>	lock.writeLock().lock();
766	>	long t = c.awaitNanos(100);
767	>	assertTrue(t <= 0);
768	>	lock.writeLock().unlock();
769		}
770
771
772		/**
773		*  timed await without a signal times out
774		*/
775	<	public void testAwait_Timeout() {
776	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
775	>	public void testAwait_Timeout() throws InterruptedException {
776	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
777		final Condition c = lock.writeLock().newCondition();
778	<	try {
779	<	lock.writeLock().lock();
780	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
595	<	lock.writeLock().unlock();
596	<	}
597	<	catch (Exception ex) {
598	<	unexpectedException();
599	<	}
778	>	lock.writeLock().lock();
779	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
780	>	lock.writeLock().unlock();
781		}
782
783		/**
784		* awaitUntil without a signal times out
785		*/
786	<	public void testAwaitUntil_Timeout() {
787	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
786	>	public void testAwaitUntil_Timeout() throws InterruptedException {
787	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
788		final Condition c = lock.writeLock().newCondition();
789	<	try {
790	<	lock.writeLock().lock();
791	<	java.util.Date d = new java.util.Date();
792	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
612	<	lock.writeLock().unlock();
613	<	}
614	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
789	>	lock.writeLock().lock();
790	>	java.util.Date d = new java.util.Date();
791	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
792	>	lock.writeLock().unlock();
793		}
794
795		/**
796		* await returns when signalled
797		*/
798	<	public void testAwait() {
799	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
798	>	public void testAwait() throws InterruptedException {
799	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
800		final Condition c = lock.writeLock().newCondition();
801	<	Thread t = new Thread(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	lock.writeLock().lock();
805	<	c.await();
806	<	lock.writeLock().unlock();
807	<	}
808	<	catch(InterruptedException e) {
809	<	threadUnexpectedException();
810	<	}
811	<	}
812	<	});
801	>	Thread t = new Thread(new CheckedRunnable() {
802	>	public void realRun() throws InterruptedException {
803	>	lock.writeLock().lock();
804	>	c.await();
805	>	lock.writeLock().unlock();
806	>	}});
807	>
808	>	t.start();
809	>	Thread.sleep(SHORT_DELAY_MS);
810	>	lock.writeLock().lock();
811	>	c.signal();
812	>	lock.writeLock().unlock();
813	>	t.join(SHORT_DELAY_MS);
814	>	assertFalse(t.isAlive());
815	>	}
816	>
817	>	/** A helper class for uninterruptible wait tests */
818	>	class UninterruptableThread extends Thread {
819	>	private Lock lock;
820	>	private Condition c;
821	>
822	>	public volatile boolean canAwake = false;
823	>	public volatile boolean interrupted = false;
824	>	public volatile boolean lockStarted = false;
825	>
826	>	public UninterruptableThread(Lock lock, Condition c) {
827	>	this.lock = lock;
828	>	this.c = c;
829	>	}
830	>
831	>	public synchronized void run() {
832	>	lock.lock();
833	>	lockStarted = true;
834	>
835	>	while (!canAwake) {
836	>	c.awaitUninterruptibly();
837	>	}
838
839	<	try {
840	<	t.start();
640	<	Thread.sleep(SHORT_DELAY_MS);
641	<	lock.writeLock().lock();
642	<	c.signal();
643	<	lock.writeLock().unlock();
644	<	t.join(SHORT_DELAY_MS);
645	<	assertFalse(t.isAlive());
646	<	}
647	<	catch (Exception ex) {
648	<	unexpectedException();
839	>	interrupted = isInterrupted();
840	>	lock.unlock();
841		}
842		}
843
844		/**
845		* awaitUninterruptibly doesn't abort on interrupt
846		*/
847	<	public void testAwaitUninterruptibly() {
848	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
847	>	public void testAwaitUninterruptibly() throws InterruptedException {
848	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
849		final Condition c = lock.writeLock().newCondition();
850	<	Thread t = new Thread(new Runnable() {
851	<	public void run() {
852	<	lock.writeLock().lock();
661	<	c.awaitUninterruptibly();
662	<	lock.writeLock().unlock();
663	<	}
664	<	});
850	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
851	>
852	>	thread.start();
853
854	+	while (!thread.lockStarted) {
855	+	Thread.sleep(100);
856	+	}
857	+
858	+	lock.writeLock().lock();
859		try {
860	<	t.start();
861	<	Thread.sleep(SHORT_DELAY_MS);
669	<	t.interrupt();
670	<	lock.writeLock().lock();
860	>	thread.interrupt();
861	>	thread.canAwake = true;
862		c.signal();
863	+	} finally {
864		lock.writeLock().unlock();
673	–	assert(t.isInterrupted());
674	–	t.join(SHORT_DELAY_MS);
675	–	assertFalse(t.isAlive());
676	–	}
677	–	catch (Exception ex) {
678	–	unexpectedException();
865		}
866	+
867	+	thread.join();
868	+	assertTrue(thread.interrupted);
869	+	assertFalse(thread.isAlive());
870		}
871
872		/**
873		* await is interruptible
874		*/
875	<	public void testAwait_Interrupt() {
876	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
875	>	public void testAwait_Interrupt() throws InterruptedException {
876	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
877		final Condition c = lock.writeLock().newCondition();
878	<	Thread t = new Thread(new Runnable() {
879	<	public void run() {
880	<	try {
881	<	lock.writeLock().lock();
882	<	c.await();
883	<	lock.writeLock().unlock();
884	<	threadShouldThrow();
885	<	}
886	<	catch(InterruptedException success) {
887	<	}
888	<	}
889	<	});
700	<
701	<	try {
702	<	t.start();
703	<	Thread.sleep(SHORT_DELAY_MS);
704	<	t.interrupt();
705	<	t.join(SHORT_DELAY_MS);
706	<	assertFalse(t.isAlive());
707	<	}
708	<	catch (Exception ex) {
709	<	unexpectedException();
710	<	}
878	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
879	>	public void realRun() throws InterruptedException {
880	>	lock.writeLock().lock();
881	>	c.await();
882	>	lock.writeLock().unlock();
883	>	}});
884	>
885	>	t.start();
886	>	Thread.sleep(SHORT_DELAY_MS);
887	>	t.interrupt();
888	>	t.join(SHORT_DELAY_MS);
889	>	assertFalse(t.isAlive());
890		}
891
892		/**
893		* awaitNanos is interruptible
894		*/
895	<	public void testAwaitNanos_Interrupt() {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
895	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
896	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
897		final Condition c = lock.writeLock().newCondition();
898	<	Thread t = new Thread(new Runnable() {
899	<	public void run() {
900	<	try {
901	<	lock.writeLock().lock();
902	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch(InterruptedException success) {
907	<	}
908	<	}
909	<	});
731	<
732	<	try {
733	<	t.start();
734	<	Thread.sleep(SHORT_DELAY_MS);
735	<	t.interrupt();
736	<	t.join(SHORT_DELAY_MS);
737	<	assertFalse(t.isAlive());
738	<	}
739	<	catch (Exception ex) {
740	<	unexpectedException();
741	<	}
898	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
899	>	public void realRun() throws InterruptedException {
900	>	lock.writeLock().lock();
901	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
902	>	lock.writeLock().unlock();
903	>	}});
904	>
905	>	t.start();
906	>	Thread.sleep(SHORT_DELAY_MS);
907	>	t.interrupt();
908	>	t.join(SHORT_DELAY_MS);
909	>	assertFalse(t.isAlive());
910		}
911
912		/**
913		* awaitUntil is interruptible
914		*/
915	<	public void testAwaitUntil_Interrupt() {
916	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
915	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
916	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
917		final Condition c = lock.writeLock().newCondition();
918	<	Thread t = new Thread(new Runnable() {
919	<	public void run() {
920	<	try {
921	<	lock.writeLock().lock();
922	<	java.util.Date d = new java.util.Date();
923	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
924	<	lock.writeLock().unlock();
925	<	threadShouldThrow();
926	<	}
927	<	catch(InterruptedException success) {
928	<	}
929	<	}
930	<	});
763	<
764	<	try {
765	<	t.start();
766	<	Thread.sleep(SHORT_DELAY_MS);
767	<	t.interrupt();
768	<	t.join(SHORT_DELAY_MS);
769	<	assertFalse(t.isAlive());
770	<	}
771	<	catch (Exception ex) {
772	<	unexpectedException();
773	<	}
918	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
919	>	public void realRun() throws InterruptedException {
920	>	lock.writeLock().lock();
921	>	java.util.Date d = new java.util.Date();
922	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
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		* signalAll wakes up all threads
935		*/
936	<	public void testSignalAll() {
937	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
936	>	public void testSignalAll() throws InterruptedException {
937	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938		final Condition c = lock.writeLock().newCondition();
939	<	Thread t1 = new Thread(new Runnable() {
940	<	public void run() {
941	<	try {
942	<	lock.writeLock().lock();
943	<	c.await();
944	<	lock.writeLock().unlock();
945	<	}
946	<	catch(InterruptedException e) {
947	<	threadUnexpectedException();
948	<	}
949	<	}
950	<	});
951	<
952	<	Thread t2 = new Thread(new Runnable() {
953	<	public void run() {
954	<	try {
955	<	lock.writeLock().lock();
956	<	c.await();
957	<	lock.writeLock().unlock();
958	<	}
959	<	catch(InterruptedException e) {
960	<	threadUnexpectedException();
961	<	}
962	<	}
806	<	});
807	<
808	<	try {
809	<	t1.start();
810	<	t2.start();
811	<	Thread.sleep(SHORT_DELAY_MS);
812	<	lock.writeLock().lock();
813	<	c.signalAll();
814	<	lock.writeLock().unlock();
815	<	t1.join(SHORT_DELAY_MS);
816	<	t2.join(SHORT_DELAY_MS);
817	<	assertFalse(t1.isAlive());
818	<	assertFalse(t2.isAlive());
819	<	}
820	<	catch (Exception ex) {
821	<	unexpectedException();
822	<	}
939	>	Thread t1 = new Thread(new CheckedRunnable() {
940	>	public void realRun() throws InterruptedException {
941	>	lock.writeLock().lock();
942	>	c.await();
943	>	lock.writeLock().unlock();
944	>	}});
945	>
946	>	Thread t2 = new Thread(new CheckedRunnable() {
947	>	public void realRun() throws InterruptedException {
948	>	lock.writeLock().lock();
949	>	c.await();
950	>	lock.writeLock().unlock();
951	>	}});
952	>
953	>	t1.start();
954	>	t2.start();
955	>	Thread.sleep(SHORT_DELAY_MS);
956	>	lock.writeLock().lock();
957	>	c.signalAll();
958	>	lock.writeLock().unlock();
959	>	t1.join(SHORT_DELAY_MS);
960	>	t2.join(SHORT_DELAY_MS);
961	>	assertFalse(t1.isAlive());
962	>	assertFalse(t2.isAlive());
963		}
964
965		/**
966		* A serialized lock deserializes as unlocked
967		*/
968	<	public void testSerialization() {
968	>	public void testSerialization() throws Exception {
969		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
970		l.readLock().lock();
971		l.readLock().unlock();
972
973	<	try {
974	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
975	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
976	<	out.writeObject(l);
977	<	out.close();
978	<
979	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
980	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
981	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
982	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
973	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
974	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
975	>	out.writeObject(l);
976	>	out.close();
977	>
978	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
979	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
980	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
981	>	r.readLock().lock();
982	>	r.readLock().unlock();
983		}
984
985		/**
986		* hasQueuedThreads reports whether there are waiting threads
987		*/
988	<	public void testhasQueuedThreads() {
989	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
988	>	public void testhasQueuedThreads() throws InterruptedException {
989	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
990		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
991		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
992	+	assertFalse(lock.hasQueuedThreads());
993	+	lock.writeLock().lock();
994	+	t1.start();
995	+	Thread.sleep(SHORT_DELAY_MS);
996	+	assertTrue(lock.hasQueuedThreads());
997	+	t2.start();
998	+	Thread.sleep(SHORT_DELAY_MS);
999	+	assertTrue(lock.hasQueuedThreads());
1000	+	t1.interrupt();
1001	+	Thread.sleep(SHORT_DELAY_MS);
1002	+	assertTrue(lock.hasQueuedThreads());
1003	+	lock.writeLock().unlock();
1004	+	Thread.sleep(SHORT_DELAY_MS);
1005	+	assertFalse(lock.hasQueuedThreads());
1006	+	t1.join();
1007	+	t2.join();
1008	+	}
1009	+
1010	+	/**
1011	+	* hasQueuedThread(null) throws NPE
1012	+	*/
1013	+	public void testHasQueuedThreadNPE() {
1014	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1015		try {
1016	<	assertFalse(lock.hasQueuedThreads());
1017	<	lock.writeLock().lock();
1018	<	t1.start();
1019	<	Thread.sleep(SHORT_DELAY_MS);
1020	<	assertTrue(lock.hasQueuedThreads());
1021	<	t2.start();
1022	<	Thread.sleep(SHORT_DELAY_MS);
1023	<	assertTrue(lock.hasQueuedThreads());
1024	<	t1.interrupt();
1025	<	Thread.sleep(SHORT_DELAY_MS);
1026	<	assertTrue(lock.hasQueuedThreads());
1027	<	lock.writeLock().unlock();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	assertFalse(lock.hasQueuedThreads());
1030	<	t1.join();
1031	<	t2.join();
1032	<	} catch(Exception e){
1033	<	unexpectedException();
1034	<	}
1035	<	}
1016	>	sync.hasQueuedThread(null);
1017	>	shouldThrow();
1018	>	} catch (NullPointerException success) {}
1019	>	}
1020	>
1021	>	/**
1022	>	* hasQueuedThread reports whether a thread is queued.
1023	>	*/
1024	>	public void testHasQueuedThread() throws InterruptedException {
1025	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1026	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1027	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1028	>	assertFalse(sync.hasQueuedThread(t1));
1029	>	assertFalse(sync.hasQueuedThread(t2));
1030	>	sync.writeLock().lock();
1031	>	t1.start();
1032	>	Thread.sleep(SHORT_DELAY_MS);
1033	>	assertTrue(sync.hasQueuedThread(t1));
1034	>	t2.start();
1035	>	Thread.sleep(SHORT_DELAY_MS);
1036	>	assertTrue(sync.hasQueuedThread(t1));
1037	>	assertTrue(sync.hasQueuedThread(t2));
1038	>	t1.interrupt();
1039	>	Thread.sleep(SHORT_DELAY_MS);
1040	>	assertFalse(sync.hasQueuedThread(t1));
1041	>	assertTrue(sync.hasQueuedThread(t2));
1042	>	sync.writeLock().unlock();
1043	>	Thread.sleep(SHORT_DELAY_MS);
1044	>	assertFalse(sync.hasQueuedThread(t1));
1045	>	Thread.sleep(SHORT_DELAY_MS);
1046	>	assertFalse(sync.hasQueuedThread(t2));
1047	>	t1.join();
1048	>	t2.join();
1049	>	}
1050	>
1051
1052		/**
1053		* getQueueLength reports number of waiting threads
1054		*/
1055	<	public void testGetQueueLength() {
1056	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1055	>	public void testGetQueueLength() throws InterruptedException {
1056	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1057		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1058		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1059	<	try {
1060	<	assertEquals(0, lock.getQueueLength());
1061	<	lock.writeLock().lock();
1062	<	t1.start();
1063	<	Thread.sleep(SHORT_DELAY_MS);
1064	<	assertEquals(1, lock.getQueueLength());
1065	<	t2.start();
1066	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	assertEquals(2, lock.getQueueLength());
1068	<	t1.interrupt();
1069	<	Thread.sleep(SHORT_DELAY_MS);
1070	<	assertEquals(1, lock.getQueueLength());
1071	<	lock.writeLock().unlock();
1072	<	Thread.sleep(SHORT_DELAY_MS);
1073	<	assertEquals(0, lock.getQueueLength());
1074	<	t1.join();
1075	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1059	>	assertEquals(0, lock.getQueueLength());
1060	>	lock.writeLock().lock();
1061	>	t1.start();
1062	>	Thread.sleep(SHORT_DELAY_MS);
1063	>	assertEquals(1, lock.getQueueLength());
1064	>	t2.start();
1065	>	Thread.sleep(SHORT_DELAY_MS);
1066	>	assertEquals(2, lock.getQueueLength());
1067	>	t1.interrupt();
1068	>	Thread.sleep(SHORT_DELAY_MS);
1069	>	assertEquals(1, lock.getQueueLength());
1070	>	lock.writeLock().unlock();
1071	>	Thread.sleep(SHORT_DELAY_MS);
1072	>	assertEquals(0, lock.getQueueLength());
1073	>	t1.join();
1074	>	t2.join();
1075	>	}
1076
1077		/**
1078		* getQueuedThreads includes waiting threads
1079		*/
1080	<	public void testGetQueuedThreads() {
1081	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1080	>	public void testGetQueuedThreads() throws InterruptedException {
1081	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1082		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1083		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1084	<	try {
1085	<	assertTrue(lock.getQueuedThreads().isEmpty());
1086	<	lock.writeLock().lock();
1087	<	assertTrue(lock.getQueuedThreads().isEmpty());
1088	<	t1.start();
1089	<	Thread.sleep(SHORT_DELAY_MS);
1090	<	assertTrue(lock.getQueuedThreads().contains(t1));
1091	<	t2.start();
1092	<	Thread.sleep(SHORT_DELAY_MS);
1093	<	assertTrue(lock.getQueuedThreads().contains(t1));
1094	<	assertTrue(lock.getQueuedThreads().contains(t2));
1095	<	t1.interrupt();
1096	<	Thread.sleep(SHORT_DELAY_MS);
1097	<	assertFalse(lock.getQueuedThreads().contains(t1));
1098	<	assertTrue(lock.getQueuedThreads().contains(t2));
1099	<	lock.writeLock().unlock();
1100	<	Thread.sleep(SHORT_DELAY_MS);
1101	<	assertTrue(lock.getQueuedThreads().isEmpty());
1102	<	t1.join();
1103	<	t2.join();
935	<	} catch(Exception e){
936	<	unexpectedException();
937	<	}
938	<	}
1084	>	assertTrue(lock.getQueuedThreads().isEmpty());
1085	>	lock.writeLock().lock();
1086	>	assertTrue(lock.getQueuedThreads().isEmpty());
1087	>	t1.start();
1088	>	Thread.sleep(SHORT_DELAY_MS);
1089	>	assertTrue(lock.getQueuedThreads().contains(t1));
1090	>	t2.start();
1091	>	Thread.sleep(SHORT_DELAY_MS);
1092	>	assertTrue(lock.getQueuedThreads().contains(t1));
1093	>	assertTrue(lock.getQueuedThreads().contains(t2));
1094	>	t1.interrupt();
1095	>	Thread.sleep(SHORT_DELAY_MS);
1096	>	assertFalse(lock.getQueuedThreads().contains(t1));
1097	>	assertTrue(lock.getQueuedThreads().contains(t2));
1098	>	lock.writeLock().unlock();
1099	>	Thread.sleep(SHORT_DELAY_MS);
1100	>	assertTrue(lock.getQueuedThreads().isEmpty());
1101	>	t1.join();
1102	>	t2.join();
1103	>	}
1104
1105		/**
1106		* hasWaiters throws NPE if null
1107		*/
1108		public void testHasWaitersNPE() {
1109	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1109	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1110		try {
1111		lock.hasWaiters(null);
1112		shouldThrow();
1113	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1113	>	} catch (NullPointerException success) {}
1114		}
1115
1116		/**
1117		* getWaitQueueLength throws NPE if null
1118		*/
1119		public void testGetWaitQueueLengthNPE() {
1120	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1120	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1121		try {
1122		lock.getWaitQueueLength(null);
1123		shouldThrow();
1124	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1124	>	} catch (NullPointerException success) {}
1125		}
1126
1127
#	Line 970 | Line 1129 | public class ReentrantReadWriteLockTest
1129		* getWaitingThreads throws NPE if null
1130		*/
1131		public void testGetWaitingThreadsNPE() {
1132	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1132	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1133		try {
1134		lock.getWaitingThreads(null);
1135		shouldThrow();
1136	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1136	>	} catch (NullPointerException success) {}
1137		}
1138
1139		/**
1140		* hasWaiters throws IAE if not owned
1141		*/
1142		public void testHasWaitersIAE() {
1143	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1144	<	final Condition c = (lock.writeLock().newCondition());
1145	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1143	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1144	>	final Condition c = lock.writeLock().newCondition();
1145	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1146		try {
1147		lock2.hasWaiters(c);
1148		shouldThrow();
1149	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1149	>	} catch (IllegalArgumentException success) {}
1150		}
1151
1152		/**
1153		* hasWaiters throws IMSE if not locked
1154		*/
1155		public void testHasWaitersIMSE() {
1156	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157	<	final Condition c = (lock.writeLock().newCondition());
1156	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157	>	final Condition c = lock.writeLock().newCondition();
1158		try {
1159		lock.hasWaiters(c);
1160		shouldThrow();
1161	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1161	>	} catch (IllegalMonitorStateException success) {}
1162		}
1163
1164
#	Line 1016 | Line 1166 | public class ReentrantReadWriteLockTest
1166		* getWaitQueueLength throws IAE if not owned
1167		*/
1168		public void testGetWaitQueueLengthIAE() {
1169	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1170	<	final Condition c = (lock.writeLock().newCondition());
1171	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1169	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1170	>	final Condition c = lock.writeLock().newCondition();
1171	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1172		try {
1173		lock2.getWaitQueueLength(c);
1174		shouldThrow();
1175	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1175	>	} catch (IllegalArgumentException success) {}
1176		}
1177
1178		/**
1179		* getWaitQueueLength throws IMSE if not locked
1180		*/
1181		public void testGetWaitQueueLengthIMSE() {
1182	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1183	<	final Condition c = (lock.writeLock().newCondition());
1182	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1183	>	final Condition c = lock.writeLock().newCondition();
1184		try {
1185		lock.getWaitQueueLength(c);
1186		shouldThrow();
1187	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1187	>	} catch (IllegalMonitorStateException success) {}
1188		}
1189
1190
#	Line 1048 | Line 1192 | public class ReentrantReadWriteLockTest
1192		* getWaitingThreads throws IAE if not owned
1193		*/
1194		public void testGetWaitingThreadsIAE() {
1195	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1196	<	final Condition c = (lock.writeLock().newCondition());
1197	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1195	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1196	>	final Condition c = lock.writeLock().newCondition();
1197	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1198		try {
1199		lock2.getWaitingThreads(c);
1200		shouldThrow();
1201	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1201	>	} catch (IllegalArgumentException success) {}
1202		}
1203
1204		/**
1205		* getWaitingThreads throws IMSE if not locked
1206		*/
1207		public void testGetWaitingThreadsIMSE() {
1208	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1209	<	final Condition c = (lock.writeLock().newCondition());
1208	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1209	>	final Condition c = lock.writeLock().newCondition();
1210		try {
1211		lock.getWaitingThreads(c);
1212		shouldThrow();
1213	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1213	>	} catch (IllegalMonitorStateException success) {}
1214		}
1215
1216
1217		/**
1218		* hasWaiters returns true when a thread is waiting, else false
1219		*/
1220	<	public void testHasWaiters() {
1221	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	<	final Condition c = (lock.writeLock().newCondition());
1223	<	Thread t = new Thread(new Runnable() {
1224	<	public void run() {
1225	<	try {
1226	<	lock.writeLock().lock();
1227	<	threadAssertFalse(lock.hasWaiters(c));
1228	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1229	<	c.await();
1230	<	lock.writeLock().unlock();
1231	<	}
1232	<	catch(InterruptedException e) {
1233	<	threadUnexpectedException();
1234	<	}
1235	<	}
1236	<	});
1237	<
1238	<	try {
1239	<	t.start();
1240	<	Thread.sleep(SHORT_DELAY_MS);
1241	<	lock.writeLock().lock();
1242	<	assertTrue(lock.hasWaiters(c));
1243	<	assertEquals(1, lock.getWaitQueueLength(c));
1244	<	c.signal();
1245	<	lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1109	<	lock.writeLock().lock();
1110	<	assertFalse(lock.hasWaiters(c));
1111	<	assertEquals(0, lock.getWaitQueueLength(c));
1112	<	lock.writeLock().unlock();
1113	<	t.join(SHORT_DELAY_MS);
1114	<	assertFalse(t.isAlive());
1115	<	}
1116	<	catch (Exception ex) {
1117	<	unexpectedException();
1118	<	}
1220	>	public void testHasWaiters() throws InterruptedException {
1221	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	>	final Condition c = lock.writeLock().newCondition();
1223	>	Thread t = new Thread(new CheckedRunnable() {
1224	>	public void realRun() throws InterruptedException {
1225	>	lock.writeLock().lock();
1226	>	threadAssertFalse(lock.hasWaiters(c));
1227	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1228	>	c.await();
1229	>	lock.writeLock().unlock();
1230	>	}});
1231	>
1232	>	t.start();
1233	>	Thread.sleep(SHORT_DELAY_MS);
1234	>	lock.writeLock().lock();
1235	>	assertTrue(lock.hasWaiters(c));
1236	>	assertEquals(1, lock.getWaitQueueLength(c));
1237	>	c.signal();
1238	>	lock.writeLock().unlock();
1239	>	Thread.sleep(SHORT_DELAY_MS);
1240	>	lock.writeLock().lock();
1241	>	assertFalse(lock.hasWaiters(c));
1242	>	assertEquals(0, lock.getWaitQueueLength(c));
1243	>	lock.writeLock().unlock();
1244	>	t.join(SHORT_DELAY_MS);
1245	>	assertFalse(t.isAlive());
1246		}
1247
1248		/**
1249		* getWaitQueueLength returns number of waiting threads
1250		*/
1251	<	public void testGetWaitQueueLength() {
1252	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1253	<	final Condition c = (lock.writeLock().newCondition());
1254	<	Thread t = new Thread(new Runnable() {
1255	<	public void run() {
1256	<	try {
1257	<	lock.writeLock().lock();
1258	<	threadAssertFalse(lock.hasWaiters(c));
1259	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1260	<	c.await();
1261	<	lock.writeLock().unlock();
1262	<	}
1263	<	catch(InterruptedException e) {
1264	<	threadUnexpectedException();
1265	<	}
1266	<	}
1267	<	});
1268	<
1269	<	try {
1270	<	t.start();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1272	<	lock.writeLock().lock();
1273	<	assertTrue(lock.hasWaiters(c));
1274	<	assertEquals(1, lock.getWaitQueueLength(c));
1275	<	c.signal();
1276	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
1251	>	public void testGetWaitQueueLength() throws InterruptedException {
1252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1253	>	final Condition c = lock.writeLock().newCondition();
1254	>	Thread t = new Thread(new CheckedRunnable() {
1255	>	public void realRun() throws InterruptedException {
1256	>	lock.writeLock().lock();
1257	>	threadAssertFalse(lock.hasWaiters(c));
1258	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1259	>	c.await();
1260	>	lock.writeLock().unlock();
1261	>	}});
1262	>
1263	>	t.start();
1264	>	Thread.sleep(SHORT_DELAY_MS);
1265	>	lock.writeLock().lock();
1266	>	assertTrue(lock.hasWaiters(c));
1267	>	assertEquals(1, lock.getWaitQueueLength(c));
1268	>	c.signal();
1269	>	lock.writeLock().unlock();
1270	>	Thread.sleep(SHORT_DELAY_MS);
1271	>	lock.writeLock().lock();
1272	>	assertFalse(lock.hasWaiters(c));
1273	>	assertEquals(0, lock.getWaitQueueLength(c));
1274	>	lock.writeLock().unlock();
1275	>	t.join(SHORT_DELAY_MS);
1276	>	assertFalse(t.isAlive());
1277		}
1278
1279
1280		/**
1281		* getWaitingThreads returns only and all waiting threads
1282		*/
1283	<	public void testGetWaitingThreads() {
1284	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1283	>	public void testGetWaitingThreads() throws InterruptedException {
1284	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1285		final Condition c = lock.writeLock().newCondition();
1286	<	Thread t1 = new Thread(new Runnable() {
1287	<	public void run() {
1288	<	try {
1289	<	lock.writeLock().lock();
1290	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1291	<	c.await();
1292	<	lock.writeLock().unlock();
1293	<	}
1294	<	catch(InterruptedException e) {
1295	<	threadUnexpectedException();
1296	<	}
1297	<	}
1298	<	});
1299	<
1300	<	Thread t2 = new Thread(new Runnable() {
1301	<	public void run() {
1302	<	try {
1303	<	lock.writeLock().lock();
1304	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1305	<	c.await();
1306	<	lock.writeLock().unlock();
1307	<	}
1308	<	catch(InterruptedException e) {
1309	<	threadUnexpectedException();
1310	<	}
1311	<	}
1312	<	});
1313	<
1314	<	try {
1315	<	lock.writeLock().lock();
1316	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1317	<	lock.writeLock().unlock();
1318	<	t1.start();
1319	<	Thread.sleep(SHORT_DELAY_MS);
1320	<	t2.start();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1322	<	lock.writeLock().lock();
1323	<	assertTrue(lock.hasWaiters(c));
1208	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1209	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1210	<	c.signalAll();
1211	<	lock.writeLock().unlock();
1212	<	Thread.sleep(SHORT_DELAY_MS);
1213	<	lock.writeLock().lock();
1214	<	assertFalse(lock.hasWaiters(c));
1215	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1216	<	lock.writeLock().unlock();
1217	<	t1.join(SHORT_DELAY_MS);
1218	<	t2.join(SHORT_DELAY_MS);
1219	<	assertFalse(t1.isAlive());
1220	<	assertFalse(t2.isAlive());
1221	<	}
1222	<	catch (Exception ex) {
1223	<	unexpectedException();
1224	<	}
1286	>	Thread t1 = new Thread(new CheckedRunnable() {
1287	>	public void realRun() throws InterruptedException {
1288	>	lock.writeLock().lock();
1289	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1290	>	c.await();
1291	>	lock.writeLock().unlock();
1292	>	}});
1293	>
1294	>	Thread t2 = new Thread(new CheckedRunnable() {
1295	>	public void realRun() throws InterruptedException {
1296	>	lock.writeLock().lock();
1297	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1298	>	c.await();
1299	>	lock.writeLock().unlock();
1300	>	}});
1301	>
1302	>	lock.writeLock().lock();
1303	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1304	>	lock.writeLock().unlock();
1305	>	t1.start();
1306	>	Thread.sleep(SHORT_DELAY_MS);
1307	>	t2.start();
1308	>	Thread.sleep(SHORT_DELAY_MS);
1309	>	lock.writeLock().lock();
1310	>	assertTrue(lock.hasWaiters(c));
1311	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1312	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1313	>	c.signalAll();
1314	>	lock.writeLock().unlock();
1315	>	Thread.sleep(SHORT_DELAY_MS);
1316	>	lock.writeLock().lock();
1317	>	assertFalse(lock.hasWaiters(c));
1318	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1319	>	lock.writeLock().unlock();
1320	>	t1.join(SHORT_DELAY_MS);
1321	>	t2.join(SHORT_DELAY_MS);
1322	>	assertFalse(t1.isAlive());
1323	>	assertFalse(t2.isAlive());
1324		}
1325
1326		/**

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines