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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 1.52 by jsr166, Mon May 2 00:34:12 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.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	+	* Releases lock, checking that it had a hold count of 1.
63	+	*/
64	+	void releaseLock(ReentrantReadWriteLock.WriteLock lock) {
65	+	assertTrue(lock.isHeldByCurrentThread());
66	+	lock.unlock();
67	+	assertFalse(lock.isHeldByCurrentThread());
68	+	}
69	+
70	+	/**
71		* Constructor sets given fairness, and is in unlocked state
72		*/
73	<	public void testConstructor() {
74	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
73	>	public void testConstructor() {
74	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
75		assertFalse(rl.isFair());
76		assertFalse(rl.isWriteLocked());
77		assertEquals(0, rl.getReadLockCount());
78	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
78	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
79		assertTrue(r2.isFair());
80		assertFalse(r2.isWriteLocked());
81		assertEquals(0, r2.getReadLockCount());
82	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
83	+	assertFalse(r3.isFair());
84	+	assertFalse(r3.isWriteLocked());
85	+	assertEquals(0, r3.getReadLockCount());
86		}
87
88		/**
89		* write-locking and read-locking an unlocked lock succeed
90		*/
91	<	public void testLock() {
92	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
91	>	public void testLock() {
92	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
93		rl.writeLock().lock();
94		assertTrue(rl.isWriteLocked());
95		assertTrue(rl.isWriteLockedByCurrentThread());
96	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
97		assertEquals(0, rl.getReadLockCount());
98		rl.writeLock().unlock();
99		assertFalse(rl.isWriteLocked());
100		assertFalse(rl.isWriteLockedByCurrentThread());
101	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
102		assertEquals(0, rl.getReadLockCount());
103		rl.readLock().lock();
104		assertFalse(rl.isWriteLocked());
#	Line 103 | Line 114 | public class ReentrantReadWriteLockTest
114		/**
115		* locking an unlocked fair lock succeeds
116		*/
117	<	public void testFairLock() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
117	>	public void testFairLock() {
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
119		rl.writeLock().lock();
120		assertTrue(rl.isWriteLocked());
121		assertTrue(rl.isWriteLockedByCurrentThread());
122	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
123		assertEquals(0, rl.getReadLockCount());
124		rl.writeLock().unlock();
125		assertFalse(rl.isWriteLocked());
126		assertFalse(rl.isWriteLockedByCurrentThread());
127	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
128		assertEquals(0, rl.getReadLockCount());
129		rl.readLock().lock();
130		assertFalse(rl.isWriteLocked());
#	Line 126 | Line 139 | public class ReentrantReadWriteLockTest
139		/**
140		* getWriteHoldCount returns number of recursive holds
141		*/
142	+	public void testGetWriteHoldCount() {
143	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
144	+	for (int i = 1; i <= SIZE; i++) {
145	+	lock.writeLock().lock();
146	+	assertEquals(i,lock.getWriteHoldCount());
147	+	}
148	+	for (int i = SIZE; i > 0; i--) {
149	+	lock.writeLock().unlock();
150	+	assertEquals(i-1,lock.getWriteHoldCount());
151	+	}
152	+	}
153	+
154	+	/**
155	+	* WriteLock.getHoldCount returns number of recursive holds
156	+	*/
157		public void testGetHoldCount() {
158	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	<	for(int i = 1; i <= SIZE; i++) {
160	<	lock.writeLock().lock();
161	<	assertEquals(i,lock.getWriteHoldCount());
162	<	}
163	<	for(int i = SIZE; i > 0; i--) {
164	<	lock.writeLock().unlock();
165	<	assertEquals(i-1,lock.getWriteHoldCount());
166	<	}
158	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	>	for (int i = 1; i <= SIZE; i++) {
160	>	lock.writeLock().lock();
161	>	assertEquals(i,lock.writeLock().getHoldCount());
162	>	}
163	>	for (int i = SIZE; i > 0; i--) {
164	>	lock.writeLock().unlock();
165	>	assertEquals(i-1,lock.writeLock().getHoldCount());
166	>	}
167		}
168	<
168	>
169	>	/**
170	>	* getReadHoldCount returns number of recursive holds
171	>	*/
172	>	public void testGetReadHoldCount() {
173	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	>	for (int i = 1; i <= SIZE; i++) {
175	>	lock.readLock().lock();
176	>	assertEquals(i,lock.getReadHoldCount());
177	>	}
178	>	for (int i = SIZE; i > 0; i--) {
179	>	lock.readLock().unlock();
180	>	assertEquals(i-1,lock.getReadHoldCount());
181	>	}
182	>	}
183	>
184
185		/**
186		* write-unlocking an unlocked lock throws IllegalMonitorStateException
187		*/
188	<	public void testUnlock_IllegalMonitorStateException() {
189	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
190	<	try {
191	<	rl.writeLock().unlock();
192	<	shouldThrow();
193	<	} catch(IllegalMonitorStateException success){}
188	>	public void testUnlock_IllegalMonitorStateException() {
189	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
190	>	try {
191	>	rl.writeLock().unlock();
192	>	shouldThrow();
193	>	} catch (IllegalMonitorStateException success) {}
194		}
195
196
197		/**
198		* write-lockInterruptibly is interruptible
199		*/
200	<	public void testWriteLockInterruptibly_Interrupted() {
201	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	Thread t = new Thread(new Runnable() {
203	<	public void run() {
204	<	try {
205	<	lock.writeLock().lockInterruptibly();
206	<	lock.writeLock().unlock();
207	<	lock.writeLock().lockInterruptibly();
208	<	lock.writeLock().unlock();
209	<	} catch(InterruptedException success){}
210	<	}
211	<	});
212	<	try {
170	<	lock.writeLock().lock();
171	<	t.start();
172	<	t.interrupt();
173	<	lock.writeLock().unlock();
174	<	t.join();
175	<	} catch(Exception e){
176	<	unexpectedException();
177	<	}
178	<	}
200	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
201	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	lock.writeLock().lock();
203	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
204	>	public void realRun() throws InterruptedException {
205	>	lock.writeLock().lockInterruptibly();
206	>	}});
207	>
208	>	Thread.sleep(SHORT_DELAY_MS);
209	>	t.interrupt();
210	>	t.join();
211	>	releaseLock(lock.writeLock());
212	>	}
213
214		/**
215		* timed write-tryLock is interruptible
216		*/
217	<	public void testWriteTryLock_Interrupted() {
218	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	<	lock.writeLock().lock();
220	<	Thread t = new Thread(new Runnable() {
221	<	public void run() {
222	<	try {
223	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
224	<	} catch(InterruptedException success){}
225	<	}
226	<	});
227	<	try {
228	<	t.start();
195	<	t.interrupt();
196	<	lock.writeLock().unlock();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
200	<	}
217	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
218	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	>	lock.writeLock().lock();
220	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
221	>	public void realRun() throws InterruptedException {
222	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
223	>	}});
224	>
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	t.interrupt();
227	>	t.join();
228	>	releaseLock(lock.writeLock());
229		}
230
231		/**
232		* read-lockInterruptibly is interruptible
233		*/
234	<	public void testReadLockInterruptibly_Interrupted() {
235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	<	lock.writeLock().lock();
237	<	Thread t = new Thread(new Runnable() {
238	<	public void run() {
239	<	try {
240	<	lock.readLock().lockInterruptibly();
241	<	} catch(InterruptedException success){}
242	<	}
243	<	});
244	<	try {
245	<	t.start();
246	<	t.interrupt();
219	<	lock.writeLock().unlock();
220	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
234	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	>	lock.writeLock().lock();
237	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
238	>	public void realRun() throws InterruptedException {
239	>	lock.readLock().lockInterruptibly();
240	>	}});
241	>
242	>	Thread.sleep(SHORT_DELAY_MS);
243	>	t.interrupt();
244	>	t.join();
245	>	releaseLock(lock.writeLock());
246	>	}
247
248		/**
249		* timed read-tryLock is interruptible
250		*/
251	<	public void testReadTryLock_Interrupted() {
252	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	<	lock.writeLock().lock();
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run() {
256	<	try {
257	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
258	<	threadShouldThrow();
259	<	} catch(InterruptedException success){}
260	<	}
261	<	});
262	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
251	>	public void testReadTryLock_Interrupted() throws InterruptedException {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	>	lock.writeLock().lock();
254	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
255	>	public void realRun() throws InterruptedException {
256	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
257	>	}});
258	>
259	>	Thread.sleep(SHORT_DELAY_MS);
260	>	t.interrupt();
261	>	t.join();
262	>	releaseLock(lock.writeLock());
263		}
264
265	<
265	>
266		/**
267		* write-tryLock fails if locked
268		*/
269	<	public void testWriteTryLockWhenLocked() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.writeLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	threadAssertFalse(lock.writeLock().tryLock());
275	<	}
276	<	});
277	<	try {
278	<	t.start();
279	<	t.join();
264	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
269	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedRunnable() {
273	>	public void realRun() {
274	>	assertFalse(lock.writeLock().tryLock());
275	>	}});
276	>
277	>	t.join();
278	>	lock.writeLock().unlock();
279	>	}
280
281		/**
282		* read-tryLock fails if locked
283		*/
284	<	public void testReadTryLockWhenLocked() {
285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	<	lock.writeLock().lock();
287	<	Thread t = new Thread(new Runnable() {
288	<	public void run() {
289	<	threadAssertFalse(lock.readLock().tryLock());
290	<	}
291	<	});
292	<	try {
293	<	t.start();
294	<	t.join();
284	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
284	>	public void testReadTryLockWhenLocked() throws InterruptedException {
285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	>	lock.writeLock().lock();
287	>	Thread t = newStartedThread(new CheckedRunnable() {
288	>	public void realRun() {
289	>	assertFalse(lock.readLock().tryLock());
290	>	}});
291	>
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();
305	<	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 = newStartedThread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	assertTrue(lock.readLock().tryLock());
305	>	lock.readLock().unlock();
306	>	}});
307	>
308	>	t.join();
309	>	lock.readLock().unlock();
310	>	}
311
312		/**
313		* A writelock succeeds after reading threads unlock
314		*/
315	<	public void testWriteAfterMultipleReadLocks() {
316	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	<	lock.readLock().lock();
318	<	Thread t1 = new Thread(new Runnable() {
319	<	public void run() {
320	<	lock.readLock().lock();
321	<	lock.readLock().unlock();
322	<	}
323	<	});
324	<	Thread t2 = new Thread(new Runnable() {
325	<	public void run() {
326	<	lock.writeLock().lock();
327	<	lock.writeLock().unlock();
328	<	}
329	<	});
330	<
331	<	try {
332	<	t1.start();
333	<	t2.start();
334	<	Thread.sleep(SHORT_DELAY_MS);
335	<	lock.readLock().unlock();
335	<	t1.join(MEDIUM_DELAY_MS);
336	<	t2.join(MEDIUM_DELAY_MS);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
315	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
316	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	>	lock.readLock().lock();
318	>	Thread t1 = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	lock.readLock().lock();
321	>	lock.readLock().unlock();
322	>	}});
323	>	Thread t2 = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	lock.writeLock().lock();
326	>	lock.writeLock().unlock();
327	>	}});
328	>
329	>	Thread.sleep(SHORT_DELAY_MS);
330	>	lock.readLock().unlock();
331	>	t1.join(MEDIUM_DELAY_MS);
332	>	t2.join(MEDIUM_DELAY_MS);
333	>	assertTrue(!t1.isAlive());
334	>	assertTrue(!t2.isAlive());
335	>	}
336
337		/**
338		* Readlocks succeed after a writing thread unlocks
339		*/
340	<	public void testReadAfterWriteLock() {
341	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
342	<	lock.writeLock().lock();
343	<	Thread t1 = new Thread(new Runnable() {
344	<	public void run() {
345	<	lock.readLock().lock();
346	<	lock.readLock().unlock();
347	<	}
348	<	});
349	<	Thread t2 = new Thread(new Runnable() {
350	<	public void run() {
351	<	lock.readLock().lock();
352	<	lock.readLock().unlock();
353	<	}
354	<	});
355	<
356	<	try {
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	<	} catch(Exception e){
367	<	unexpectedException();
368	<	}
369	<	}
340	>	public void testReadAfterWriteLock() throws InterruptedException {
341	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
342	>	lock.writeLock().lock();
343	>	Thread t1 = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() {
345	>	lock.readLock().lock();
346	>	lock.readLock().unlock();
347	>	}});
348	>	Thread t2 = newStartedThread(new CheckedRunnable() {
349	>	public void realRun() {
350	>	lock.readLock().lock();
351	>	lock.readLock().unlock();
352	>	}});
353	>
354	>	Thread.sleep(SHORT_DELAY_MS);
355	>	lock.writeLock().unlock();
356	>	t1.join(MEDIUM_DELAY_MS);
357	>	t2.join(MEDIUM_DELAY_MS);
358	>	assertTrue(!t1.isAlive());
359	>	assertTrue(!t2.isAlive());
360	>	}
361	>
362	>	/**
363	>	* Read trylock succeeds if write locked by current thread
364	>	*/
365	>	public void testReadHoldingWriteLock() {
366	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
367	>	lock.writeLock().lock();
368	>	assertTrue(lock.readLock().tryLock());
369	>	lock.readLock().unlock();
370	>	lock.writeLock().unlock();
371	>	}
372	>
373	>	/**
374	>	* Read lock succeeds if write locked by current thread even if
375	>	* other threads are waiting for readlock
376	>	*/
377	>	public void testReadHoldingWriteLock2() throws InterruptedException {
378	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
379	>	lock.writeLock().lock();
380	>	Thread t1 = newStartedThread(new CheckedRunnable() {
381	>	public void realRun() {
382	>	lock.readLock().lock();
383	>	lock.readLock().unlock();
384	>	}});
385	>	Thread t2 = newStartedThread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	lock.readLock().lock();
388	>	lock.readLock().unlock();
389	>	}});
390	>
391	>	lock.readLock().lock();
392	>	lock.readLock().unlock();
393	>	Thread.sleep(SHORT_DELAY_MS);
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	lock.writeLock().unlock();
397	>	t1.join(MEDIUM_DELAY_MS);
398	>	t2.join(MEDIUM_DELAY_MS);
399	>	assertTrue(!t1.isAlive());
400	>	assertTrue(!t2.isAlive());
401	>	}
402	>
403	>	/**
404	>	* Read lock succeeds if write locked by current thread even if
405	>	* other threads are waiting for writelock
406	>	*/
407	>	public void testReadHoldingWriteLock3() throws InterruptedException {
408	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
409	>	lock.writeLock().lock();
410	>	Thread t1 = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	lock.writeLock().lock();
413	>	lock.writeLock().unlock();
414	>	}});
415	>	Thread t2 = newStartedThread(new CheckedRunnable() {
416	>	public void realRun() {
417	>	lock.writeLock().lock();
418	>	lock.writeLock().unlock();
419	>	}});
420	>
421	>	lock.readLock().lock();
422	>	lock.readLock().unlock();
423	>	Thread.sleep(SHORT_DELAY_MS);
424	>	lock.readLock().lock();
425	>	lock.readLock().unlock();
426	>	lock.writeLock().unlock();
427	>	t1.join(MEDIUM_DELAY_MS);
428	>	t2.join(MEDIUM_DELAY_MS);
429	>	assertTrue(!t1.isAlive());
430	>	assertTrue(!t2.isAlive());
431	>	}
432	>
433	>
434	>	/**
435	>	* Write lock succeeds if write locked by current thread even if
436	>	* other threads are waiting for writelock
437	>	*/
438	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	>	lock.writeLock().lock();
441	>	Thread t1 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446	>	Thread t2 = newStartedThread(new CheckedRunnable() {
447	>	public void realRun() {
448	>	lock.writeLock().lock();
449	>	lock.writeLock().unlock();
450	>	}});
451	>
452	>	lock.writeLock().lock();
453	>	lock.writeLock().unlock();
454	>	Thread.sleep(SHORT_DELAY_MS);
455	>	lock.writeLock().lock();
456	>	lock.writeLock().unlock();
457	>	lock.writeLock().unlock();
458	>	t1.join(MEDIUM_DELAY_MS);
459	>	t2.join(MEDIUM_DELAY_MS);
460	>	assertTrue(!t1.isAlive());
461	>	assertTrue(!t2.isAlive());
462	>	}
463	>
464	>
465	>	/**
466	>	* Fair Read trylock succeeds if write locked by current thread
467	>	*/
468	>	public void testReadHoldingWriteLockFair() {
469	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
470	>	lock.writeLock().lock();
471	>	assertTrue(lock.readLock().tryLock());
472	>	lock.readLock().unlock();
473	>	lock.writeLock().unlock();
474	>	}
475	>
476	>	/**
477	>	* Fair Read lock succeeds if write locked by current thread even if
478	>	* other threads are waiting for readlock
479	>	*/
480	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
481	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
482	>	lock.writeLock().lock();
483	>	Thread t1 = newStartedThread(new CheckedRunnable() {
484	>	public void realRun() {
485	>	lock.readLock().lock();
486	>	lock.readLock().unlock();
487	>	}});
488	>	Thread t2 = newStartedThread(new CheckedRunnable() {
489	>	public void realRun() {
490	>	lock.readLock().lock();
491	>	lock.readLock().unlock();
492	>	}});
493	>
494	>	lock.readLock().lock();
495	>	lock.readLock().unlock();
496	>	Thread.sleep(SHORT_DELAY_MS);
497	>	lock.readLock().lock();
498	>	lock.readLock().unlock();
499	>	lock.writeLock().unlock();
500	>	t1.join(MEDIUM_DELAY_MS);
501	>	t2.join(MEDIUM_DELAY_MS);
502	>	assertTrue(!t1.isAlive());
503	>	assertTrue(!t2.isAlive());
504	>	}
505	>
506	>
507	>	/**
508	>	* Fair Read lock succeeds if write locked by current thread even if
509	>	* other threads are waiting for writelock
510	>	*/
511	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
512	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
513	>	lock.writeLock().lock();
514	>	Thread t1 = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}});
519	>	Thread t2 = newStartedThread(new CheckedRunnable() {
520	>	public void realRun() {
521	>	lock.writeLock().lock();
522	>	lock.writeLock().unlock();
523	>	}});
524	>
525	>	lock.readLock().lock();
526	>	lock.readLock().unlock();
527	>	Thread.sleep(SHORT_DELAY_MS);
528	>	lock.readLock().lock();
529	>	lock.readLock().unlock();
530	>	lock.writeLock().unlock();
531	>	t1.join(MEDIUM_DELAY_MS);
532	>	t2.join(MEDIUM_DELAY_MS);
533	>	assertTrue(!t1.isAlive());
534	>	assertTrue(!t2.isAlive());
535	>	}
536	>
537	>
538	>	/**
539	>	* Fair Write lock succeeds if write locked by current thread even if
540	>	* other threads are waiting for writelock
541	>	*/
542	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
543	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
544	>	lock.writeLock().lock();
545	>	Thread t1 = newStartedThread(new CheckedRunnable() {
546	>	public void realRun() {
547	>	lock.writeLock().lock();
548	>	lock.writeLock().unlock();
549	>	}});
550	>	Thread t2 = newStartedThread(new CheckedRunnable() {
551	>	public void realRun() {
552	>	lock.writeLock().lock();
553	>	lock.writeLock().unlock();
554	>	}});
555	>
556	>	Thread.sleep(SHORT_DELAY_MS);
557	>	assertTrue(lock.isWriteLockedByCurrentThread());
558	>	assertEquals(1, lock.getWriteHoldCount());
559	>	lock.writeLock().lock();
560	>	assertEquals(2, lock.getWriteHoldCount());
561	>	lock.writeLock().unlock();
562	>	lock.writeLock().lock();
563	>	lock.writeLock().unlock();
564	>	lock.writeLock().unlock();
565	>	t1.join(MEDIUM_DELAY_MS);
566	>	t2.join(MEDIUM_DELAY_MS);
567	>	assertTrue(!t1.isAlive());
568	>	assertTrue(!t2.isAlive());
569	>	}
570
571
572		/**
573		* Read tryLock succeeds if readlocked but not writelocked
574		*/
575	<	public void testTryLockWhenReadLocked() {
576	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
577	<	lock.readLock().lock();
578	<	Thread t = new Thread(new Runnable() {
579	<	public void run() {
580	<	threadAssertTrue(lock.readLock().tryLock());
581	<	lock.readLock().unlock();
582	<	}
391	<	});
392	<	try {
393	<	t.start();
394	<	t.join();
395	<	lock.readLock().unlock();
396	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
575	>	public void testTryLockWhenReadLocked() throws InterruptedException {
576	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
577	>	lock.readLock().lock();
578	>	Thread t = newStartedThread(new CheckedRunnable() {
579	>	public void realRun() {
580	>	assertTrue(lock.readLock().tryLock());
581	>	lock.readLock().unlock();
582	>	}});
583
584	<
584	>	t.join();
585	>	lock.readLock().unlock();
586	>	}
587
588		/**
589		* write tryLock fails when readlocked
590		*/
591	<	public void testWriteTryLockWhenReadLocked() {
592	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
593	<	lock.readLock().lock();
594	<	Thread t = new Thread(new Runnable() {
595	<	public void run() {
596	<	threadAssertFalse(lock.writeLock().tryLock());
597	<	}
598	<	});
599	<	try {
600	<	t.start();
601	<	t.join();
602	<	lock.readLock().unlock();
603	<	} catch(Exception e){
604	<	unexpectedException();
605	<	}
606	<	}
591	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
592	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
593	>	lock.readLock().lock();
594	>	Thread t = newStartedThread(new CheckedRunnable() {
595	>	public void realRun() {
596	>	assertFalse(lock.writeLock().tryLock());
597	>	}});
598	>
599	>	t.join();
600	>	lock.readLock().unlock();
601	>	}
602	>
603	>
604	>	/**
605	>	* Fair Read tryLock succeeds if readlocked but not writelocked
606	>	*/
607	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
608	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
609	>	lock.readLock().lock();
610	>	Thread t = newStartedThread(new CheckedRunnable() {
611	>	public void realRun() {
612	>	assertTrue(lock.readLock().tryLock());
613	>	lock.readLock().unlock();
614	>	}});
615	>
616	>	t.join();
617	>	lock.readLock().unlock();
618	>	}
619	>
620	>
621	>
622	>	/**
623	>	* Fair write tryLock fails when readlocked
624	>	*/
625	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertFalse(lock.writeLock().tryLock());
631	>	}});
632	>
633	>	t.join();
634	>	lock.readLock().unlock();
635	>	}
636	>
637
423	–
638
639		/**
640		* write timed tryLock times out if locked
641		*/
642	<	public void testWriteTryLock_Timeout() {
643	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	<	lock.writeLock().lock();
645	<	Thread t = new Thread(new Runnable() {
646	<	public void run() {
647	<	try {
648	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
649	<	} catch (Exception ex) {
650	<	threadUnexpectedException();
651	<	}
652	<	}
653	<	});
440	<	try {
441	<	t.start();
442	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
642	>	public void testWriteTryLock_Timeout() throws InterruptedException {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	>	lock.writeLock().lock();
645	>	Thread t = newStartedThread(new CheckedRunnable() {
646	>	public void realRun() throws InterruptedException {
647	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
648	>	}});
649	>
650	>	t.join();
651	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
652	>	lock.writeLock().unlock();
653	>	}
654
655		/**
656		* read timed tryLock times out if write-locked
657		*/
658	<	public void testReadTryLock_Timeout() {
659	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
660	<	lock.writeLock().lock();
661	<	Thread t = new Thread(new Runnable() {
662	<	public void run() {
663	<	try {
664	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
665	<	} catch (Exception ex) {
666	<	threadUnexpectedException();
667	<	}
668	<	}
669	<	});
464	<	try {
465	<	t.start();
466	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
658	>	public void testReadTryLock_Timeout() throws InterruptedException {
659	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
660	>	lock.writeLock().lock();
661	>	Thread t = newStartedThread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
664	>	}});
665	>
666	>	t.join();
667	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
668	>	lock.writeLock().unlock();
669	>	}
670
671
672		/**
673		* write lockInterruptibly succeeds if lock free else is interruptible
674		*/
675	<	public void testWriteLockInterruptibly() {
676	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	<	try {
678	<	lock.writeLock().lockInterruptibly();
679	<	} catch(Exception e) {
680	<	unexpectedException();
681	<	}
682	<	Thread t = new Thread(new Runnable() {
683	<	public void run() {
684	<	try {
685	<	lock.writeLock().lockInterruptibly();
686	<	threadShouldThrow();
489	<	}
490	<	catch(InterruptedException success) {
491	<	}
492	<	}
493	<	});
494	<	try {
495	<	t.start();
496	<	t.interrupt();
497	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
675	>	public void testWriteLockInterruptibly() throws InterruptedException {
676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	>	lock.writeLock().lockInterruptibly();
678	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
679	>	public void realRun() throws InterruptedException {
680	>	lock.writeLock().lockInterruptibly();
681	>	}});
682	>
683	>	Thread.sleep(SHORT_DELAY_MS);
684	>	t.interrupt();
685	>	t.join();
686	>	releaseLock(lock.writeLock());
687		}
688
689		/**
690	<	*  read lockInterruptibly succeeds if lock free else is interruptible
690	>	* read lockInterruptibly succeeds if lock free else is interruptible
691		*/
692	<	public void testReadLockInterruptibly() {
693	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
694	<	try {
695	<	lock.writeLock().lockInterruptibly();
696	<	} catch(Exception e) {
697	<	unexpectedException();
698	<	}
699	<	Thread t = new Thread(new Runnable() {
700	<	public void run() {
701	<	try {
702	<	lock.readLock().lockInterruptibly();
703	<	threadShouldThrow();
519	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
524	<	try {
525	<	t.start();
526	<	t.interrupt();
527	<	t.join();
528	<	lock.writeLock().unlock();
529	<	} catch(Exception e){
530	<	unexpectedException();
531	<	}
692	>	public void testReadLockInterruptibly() throws InterruptedException {
693	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
694	>	lock.writeLock().lockInterruptibly();
695	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
696	>	public void realRun() throws InterruptedException {
697	>	lock.readLock().lockInterruptibly();
698	>	}});
699	>
700	>	Thread.sleep(SHORT_DELAY_MS);
701	>	t.interrupt();
702	>	t.join();
703	>	releaseLock(lock.writeLock());
704		}
705
706		/**
707		* Calling await without holding lock throws IllegalMonitorStateException
708		*/
709	<	public void testAwait_IllegalMonitor() {
710	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
709	>	public void testAwait_IllegalMonitor() throws InterruptedException {
710	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
711		final Condition c = lock.writeLock().newCondition();
712		try {
713		c.await();
714		shouldThrow();
715	<	}
544	<	catch (IllegalMonitorStateException success) {
545	<	}
546	<	catch (Exception ex) {
547	<	shouldThrow();
548	<	}
715	>	} catch (IllegalMonitorStateException success) {}
716		}
717
718		/**
719		* Calling signal without holding lock throws IllegalMonitorStateException
720		*/
721		public void testSignal_IllegalMonitor() {
722	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
723		final Condition c = lock.writeLock().newCondition();
724		try {
725		c.signal();
726		shouldThrow();
727	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
727	>	} catch (IllegalMonitorStateException success) {}
728		}
729
730		/**
731		* awaitNanos without a signal times out
732		*/
733	<	public void testAwaitNanos_Timeout() {
734	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
733	>	public void testAwaitNanos_Timeout() throws InterruptedException {
734	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
735		final Condition c = lock.writeLock().newCondition();
736	<	try {
737	<	lock.writeLock().lock();
738	<	long t = c.awaitNanos(100);
739	<	assertTrue(t <= 0);
740	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
736	>
737	>	lock.writeLock().lock();
738	>	long t = c.awaitNanos(100);
739	>	assertTrue(t <= 0);
740	>	lock.writeLock().unlock();
741		}
742
743
744		/**
745	<	*  timed await without a signal times out
745	>	* timed await without a signal times out
746		*/
747	<	public void testAwait_Timeout() {
748	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
747	>	public void testAwait_Timeout() throws InterruptedException {
748	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
749		final Condition c = lock.writeLock().newCondition();
750	<	try {
751	<	lock.writeLock().lock();
752	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
595	<	lock.writeLock().unlock();
596	<	}
597	<	catch (Exception ex) {
598	<	unexpectedException();
599	<	}
750	>	lock.writeLock().lock();
751	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
752	>	lock.writeLock().unlock();
753		}
754
755		/**
756		* awaitUntil without a signal times out
757		*/
758	<	public void testAwaitUntil_Timeout() {
759	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
758	>	public void testAwaitUntil_Timeout() throws InterruptedException {
759	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
760		final Condition c = lock.writeLock().newCondition();
761	<	try {
762	<	lock.writeLock().lock();
763	<	java.util.Date d = new java.util.Date();
764	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
612	<	lock.writeLock().unlock();
613	<	}
614	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
761	>	lock.writeLock().lock();
762	>	java.util.Date d = new java.util.Date();
763	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
764	>	lock.writeLock().unlock();
765		}
766
767		/**
768		* await returns when signalled
769		*/
770	<	public void testAwait() {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
770	>	public void testAwait() throws InterruptedException {
771	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772		final Condition c = lock.writeLock().newCondition();
773	<	Thread t = new Thread(new Runnable() {
774	<	public void run() {
775	<	try {
776	<	lock.writeLock().lock();
777	<	c.await();
778	<	lock.writeLock().unlock();
779	<	}
780	<	catch(InterruptedException e) {
781	<	threadUnexpectedException();
782	<	}
783	<	}
784	<	});
773	>	Thread t = newStartedThread(new CheckedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	lock.writeLock().lock();
776	>	c.await();
777	>	lock.writeLock().unlock();
778	>	}});
779	>
780	>	Thread.sleep(SHORT_DELAY_MS);
781	>	lock.writeLock().lock();
782	>	c.signal();
783	>	lock.writeLock().unlock();
784	>	t.join(SHORT_DELAY_MS);
785	>	assertFalse(t.isAlive());
786	>	}
787	>
788	>	/** A helper class for uninterruptible wait tests */
789	>	class UninterruptableThread extends Thread {
790	>	private Lock lock;
791	>	private Condition c;
792	>
793	>	public volatile boolean canAwake = false;
794	>	public volatile boolean interrupted = false;
795	>	public volatile boolean lockStarted = false;
796	>
797	>	public UninterruptableThread(Lock lock, Condition c) {
798	>	this.lock = lock;
799	>	this.c = c;
800	>	}
801	>
802	>	public synchronized void run() {
803	>	lock.lock();
804	>	lockStarted = true;
805	>
806	>	while (!canAwake) {
807	>	c.awaitUninterruptibly();
808	>	}
809
810	<	try {
811	<	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();
810	>	interrupted = isInterrupted();
811	>	lock.unlock();
812		}
813		}
814
815		/**
816		* awaitUninterruptibly doesn't abort on interrupt
817		*/
818	<	public void testAwaitUninterruptibly() {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	>	public void testAwaitUninterruptibly() throws InterruptedException {
819	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820		final Condition c = lock.writeLock().newCondition();
821	<	Thread t = new Thread(new Runnable() {
822	<	public void run() {
823	<	lock.writeLock().lock();
824	<	c.awaitUninterruptibly();
825	<	lock.writeLock().unlock();
826	<	}
827	<	});
821	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
822	>
823	>	thread.start();
824	>
825	>	while (!thread.lockStarted) {
826	>	Thread.sleep(100);
827	>	}
828
829	+	lock.writeLock().lock();
830		try {
831	<	t.start();
832	<	Thread.sleep(SHORT_DELAY_MS);
669	<	t.interrupt();
670	<	lock.writeLock().lock();
831	>	thread.interrupt();
832	>	thread.canAwake = true;
833		c.signal();
834	+	} finally {
835		lock.writeLock().unlock();
673	–	assert(t.isInterrupted());
674	–	t.join(SHORT_DELAY_MS);
675	–	assertFalse(t.isAlive());
676	–	}
677	–	catch (Exception ex) {
678	–	unexpectedException();
836		}
837	+
838	+	thread.join();
839	+	assertTrue(thread.interrupted);
840	+	assertFalse(thread.isAlive());
841		}
842
843		/**
844		* await is interruptible
845		*/
846	<	public void testAwait_Interrupt() {
847	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846	>	public void testAwait_Interrupt() throws InterruptedException {
847	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
848		final Condition c = lock.writeLock().newCondition();
849	<	Thread t = new Thread(new Runnable() {
850	<	public void run() {
851	<	try {
852	<	lock.writeLock().lock();
853	<	c.await();
854	<	lock.writeLock().unlock();
855	<	threadShouldThrow();
856	<	}
857	<	catch(InterruptedException success) {
858	<	}
859	<	}
860	<	});
861	<
862	<	try {
863	<	t.start();
864	<	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	<	}
849	>	final CountDownLatch locked = new CountDownLatch(1);
850	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
851	>	public void realRun() throws InterruptedException {
852	>	lock.writeLock().lock();
853	>	assertTrue(lock.isWriteLocked());
854	>	locked.countDown();
855	>	try { c.await(); }
856	>	finally { lock.writeLock().unlock(); }
857	>	}});
858	>
859	>	locked.await();
860	>	while (lock.isWriteLocked())
861	>	Thread.yield();
862	>	t.interrupt();
863	>	awaitTermination(t, LONG_DELAY_MS);
864	>	assertFalse(lock.isWriteLocked());
865		}
866
867		/**
868		* awaitNanos is interruptible
869		*/
870	<	public void testAwaitNanos_Interrupt() {
871	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
871	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
872		final Condition c = lock.writeLock().newCondition();
873	<	Thread t = new Thread(new Runnable() {
874	<	public void run() {
875	<	try {
876	<	lock.writeLock().lock();
877	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
878	<	lock.writeLock().unlock();
879	<	threadShouldThrow();
880	<	}
881	<	catch(InterruptedException success) {
882	<	}
883	<	}
884	<	});
885	<
886	<	try {
887	<	t.start();
888	<	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	<	}
873	>	final CountDownLatch locked = new CountDownLatch(1);
874	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
875	>	public void realRun() throws InterruptedException {
876	>	lock.writeLock().lock();
877	>	assertTrue(lock.isWriteLocked());
878	>	locked.countDown();
879	>	try { c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); }
880	>	finally { lock.writeLock().unlock(); }
881	>	}});
882	>
883	>	locked.await();
884	>	while (lock.isWriteLocked())
885	>	Thread.yield();
886	>	t.interrupt();
887	>	awaitTermination(t, LONG_DELAY_MS);
888	>	assertFalse(lock.isWriteLocked());
889		}
890
891		/**
892		* awaitUntil is interruptible
893		*/
894	<	public void testAwaitUntil_Interrupt() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
895	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896		final Condition c = lock.writeLock().newCondition();
897	<	Thread t = new Thread(new Runnable() {
898	<	public void run() {
899	<	try {
900	<	lock.writeLock().lock();
901	<	java.util.Date d = new java.util.Date();
902	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch(InterruptedException success) {
907	<	}
908	<	}
909	<	});
910	<
911	<	try {
912	<	t.start();
913	<	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	<	}
897	>	final CountDownLatch locked = new CountDownLatch(1);
898	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
899	>	public void realRun() throws InterruptedException {
900	>	lock.writeLock().lock();
901	>	assertTrue(lock.isWriteLocked());
902	>	locked.countDown();
903	>	java.util.Date d = new java.util.Date();
904	>	try { c.awaitUntil(new java.util.Date(d.getTime() + 10000)); }
905	>	finally { lock.writeLock().unlock(); }
906	>	}});
907	>
908	>	locked.await();
909	>	while (lock.isWriteLocked())
910	>	Thread.yield();
911	>	t.interrupt();
912	>	awaitTermination(t, LONG_DELAY_MS);
913	>	assertFalse(lock.isWriteLocked());
914		}
915
916		/**
917		* signalAll wakes up all threads
918		*/
919	<	public void testSignalAll() {
920	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
919	>	public void testSignalAll() throws InterruptedException {
920	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
921		final Condition c = lock.writeLock().newCondition();
922	<	Thread t1 = new Thread(new Runnable() {
923	<	public void run() {
924	<	try {
925	<	lock.writeLock().lock();
926	<	c.await();
927	<	lock.writeLock().unlock();
928	<	}
929	<	catch(InterruptedException e) {
930	<	threadUnexpectedException();
931	<	}
932	<	}
933	<	});
934	<
935	<	Thread t2 = new Thread(new Runnable() {
936	<	public void run() {
937	<	try {
938	<	lock.writeLock().lock();
939	<	c.await();
940	<	lock.writeLock().unlock();
941	<	}
942	<	catch(InterruptedException e) {
943	<	threadUnexpectedException();
804	<	}
805	<	}
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	<	}
922	>	Thread t1 = newStartedThread(new CheckedRunnable() {
923	>	public void realRun() throws InterruptedException {
924	>	lock.writeLock().lock();
925	>	c.await();
926	>	lock.writeLock().unlock();
927	>	}});
928	>
929	>	Thread t2 = newStartedThread(new CheckedRunnable() {
930	>	public void realRun() throws InterruptedException {
931	>	lock.writeLock().lock();
932	>	c.await();
933	>	lock.writeLock().unlock();
934	>	}});
935	>
936	>	Thread.sleep(SHORT_DELAY_MS);
937	>	lock.writeLock().lock();
938	>	c.signalAll();
939	>	lock.writeLock().unlock();
940	>	t1.join(SHORT_DELAY_MS);
941	>	t2.join(SHORT_DELAY_MS);
942	>	assertFalse(t1.isAlive());
943	>	assertFalse(t2.isAlive());
944		}
945
946		/**
947		* A serialized lock deserializes as unlocked
948		*/
949	<	public void testSerialization() {
949	>	public void testSerialization() throws Exception {
950		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
951		l.readLock().lock();
952		l.readLock().unlock();
953
954	<	try {
955	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
956	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
957	<	out.writeObject(l);
958	<	out.close();
959	<
960	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
961	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
962	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
963	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
954	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
955	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
956	>	out.writeObject(l);
957	>	out.close();
958	>
959	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
960	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
961	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
962	>	r.readLock().lock();
963	>	r.readLock().unlock();
964		}
965
966		/**
967		* hasQueuedThreads reports whether there are waiting threads
968		*/
969	<	public void testhasQueuedThreads() {
970	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
969	>	public void testhasQueuedThreads() throws InterruptedException {
970	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
971		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
972		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
973	+	assertFalse(lock.hasQueuedThreads());
974	+	lock.writeLock().lock();
975	+	t1.start();
976	+	Thread.sleep(SHORT_DELAY_MS);
977	+	assertTrue(lock.hasQueuedThreads());
978	+	t2.start();
979	+	Thread.sleep(SHORT_DELAY_MS);
980	+	assertTrue(lock.hasQueuedThreads());
981	+	t1.interrupt();
982	+	Thread.sleep(SHORT_DELAY_MS);
983	+	assertTrue(lock.hasQueuedThreads());
984	+	lock.writeLock().unlock();
985	+	Thread.sleep(SHORT_DELAY_MS);
986	+	assertFalse(lock.hasQueuedThreads());
987	+	t1.join();
988	+	t2.join();
989	+	}
990	+
991	+	/**
992	+	* hasQueuedThread(null) throws NPE
993	+	*/
994	+	public void testHasQueuedThreadNPE() {
995	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
996		try {
997	<	assertFalse(lock.hasQueuedThreads());
998	<	lock.writeLock().lock();
999	<	t1.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	assertTrue(lock.hasQueuedThreads());
1002	<	t2.start();
1003	<	Thread.sleep(SHORT_DELAY_MS);
1004	<	assertTrue(lock.hasQueuedThreads());
1005	<	t1.interrupt();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	assertTrue(lock.hasQueuedThreads());
1008	<	lock.writeLock().unlock();
1009	<	Thread.sleep(SHORT_DELAY_MS);
1010	<	assertFalse(lock.hasQueuedThreads());
1011	<	t1.join();
1012	<	t2.join();
1013	<	} catch(Exception e){
1014	<	unexpectedException();
1015	<	}
1016	<	}
997	>	sync.hasQueuedThread(null);
998	>	shouldThrow();
999	>	} catch (NullPointerException success) {}
1000	>	}
1001	>
1002	>	/**
1003	>	* hasQueuedThread reports whether a thread is queued.
1004	>	*/
1005	>	public void testHasQueuedThread() throws InterruptedException {
1006	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1007	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1008	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1009	>	assertFalse(sync.hasQueuedThread(t1));
1010	>	assertFalse(sync.hasQueuedThread(t2));
1011	>	sync.writeLock().lock();
1012	>	t1.start();
1013	>	Thread.sleep(SHORT_DELAY_MS);
1014	>	assertTrue(sync.hasQueuedThread(t1));
1015	>	t2.start();
1016	>	Thread.sleep(SHORT_DELAY_MS);
1017	>	assertTrue(sync.hasQueuedThread(t1));
1018	>	assertTrue(sync.hasQueuedThread(t2));
1019	>	t1.interrupt();
1020	>	Thread.sleep(SHORT_DELAY_MS);
1021	>	assertFalse(sync.hasQueuedThread(t1));
1022	>	assertTrue(sync.hasQueuedThread(t2));
1023	>	sync.writeLock().unlock();
1024	>	Thread.sleep(SHORT_DELAY_MS);
1025	>	assertFalse(sync.hasQueuedThread(t1));
1026	>	Thread.sleep(SHORT_DELAY_MS);
1027	>	assertFalse(sync.hasQueuedThread(t2));
1028	>	t1.join();
1029	>	t2.join();
1030	>	}
1031	>
1032
1033		/**
1034		* getQueueLength reports number of waiting threads
1035		*/
1036	<	public void testGetQueueLength() {
1037	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1036	>	public void testGetQueueLength() throws InterruptedException {
1037	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1038		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1039		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1040	<	try {
1041	<	assertEquals(0, lock.getQueueLength());
1042	<	lock.writeLock().lock();
1043	<	t1.start();
1044	<	Thread.sleep(SHORT_DELAY_MS);
1045	<	assertEquals(1, lock.getQueueLength());
1046	<	t2.start();
1047	<	Thread.sleep(SHORT_DELAY_MS);
1048	<	assertEquals(2, lock.getQueueLength());
1049	<	t1.interrupt();
1050	<	Thread.sleep(SHORT_DELAY_MS);
1051	<	assertEquals(1, lock.getQueueLength());
1052	<	lock.writeLock().unlock();
1053	<	Thread.sleep(SHORT_DELAY_MS);
1054	<	assertEquals(0, lock.getQueueLength());
1055	<	t1.join();
1056	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1040	>	assertEquals(0, lock.getQueueLength());
1041	>	lock.writeLock().lock();
1042	>	t1.start();
1043	>	Thread.sleep(SHORT_DELAY_MS);
1044	>	assertEquals(1, lock.getQueueLength());
1045	>	t2.start();
1046	>	Thread.sleep(SHORT_DELAY_MS);
1047	>	assertEquals(2, lock.getQueueLength());
1048	>	t1.interrupt();
1049	>	Thread.sleep(SHORT_DELAY_MS);
1050	>	assertEquals(1, lock.getQueueLength());
1051	>	lock.writeLock().unlock();
1052	>	Thread.sleep(SHORT_DELAY_MS);
1053	>	assertEquals(0, lock.getQueueLength());
1054	>	t1.join();
1055	>	t2.join();
1056	>	}
1057
1058		/**
1059		* getQueuedThreads includes waiting threads
1060		*/
1061	<	public void testGetQueuedThreads() {
1062	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1061	>	public void testGetQueuedThreads() throws InterruptedException {
1062	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1063		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1064		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1065	<	try {
1066	<	assertTrue(lock.getQueuedThreads().isEmpty());
1067	<	lock.writeLock().lock();
1068	<	assertTrue(lock.getQueuedThreads().isEmpty());
1069	<	t1.start();
1070	<	Thread.sleep(SHORT_DELAY_MS);
1071	<	assertTrue(lock.getQueuedThreads().contains(t1));
1072	<	t2.start();
1073	<	Thread.sleep(SHORT_DELAY_MS);
1074	<	assertTrue(lock.getQueuedThreads().contains(t1));
1075	<	assertTrue(lock.getQueuedThreads().contains(t2));
1076	<	t1.interrupt();
1077	<	Thread.sleep(SHORT_DELAY_MS);
1078	<	assertFalse(lock.getQueuedThreads().contains(t1));
1079	<	assertTrue(lock.getQueuedThreads().contains(t2));
1080	<	lock.writeLock().unlock();
1081	<	Thread.sleep(SHORT_DELAY_MS);
1082	<	assertTrue(lock.getQueuedThreads().isEmpty());
1083	<	t1.join();
1084	<	t2.join();
935	<	} catch(Exception e){
936	<	unexpectedException();
937	<	}
938	<	}
1065	>	assertTrue(lock.getQueuedThreads().isEmpty());
1066	>	lock.writeLock().lock();
1067	>	assertTrue(lock.getQueuedThreads().isEmpty());
1068	>	t1.start();
1069	>	Thread.sleep(SHORT_DELAY_MS);
1070	>	assertTrue(lock.getQueuedThreads().contains(t1));
1071	>	t2.start();
1072	>	Thread.sleep(SHORT_DELAY_MS);
1073	>	assertTrue(lock.getQueuedThreads().contains(t1));
1074	>	assertTrue(lock.getQueuedThreads().contains(t2));
1075	>	t1.interrupt();
1076	>	Thread.sleep(SHORT_DELAY_MS);
1077	>	assertFalse(lock.getQueuedThreads().contains(t1));
1078	>	assertTrue(lock.getQueuedThreads().contains(t2));
1079	>	lock.writeLock().unlock();
1080	>	Thread.sleep(SHORT_DELAY_MS);
1081	>	assertTrue(lock.getQueuedThreads().isEmpty());
1082	>	t1.join();
1083	>	t2.join();
1084	>	}
1085
1086		/**
1087		* hasWaiters throws NPE if null
1088		*/
1089		public void testHasWaitersNPE() {
1090	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1090	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1091		try {
1092		lock.hasWaiters(null);
1093		shouldThrow();
1094	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1094	>	} catch (NullPointerException success) {}
1095		}
1096
1097		/**
1098		* getWaitQueueLength throws NPE if null
1099		*/
1100		public void testGetWaitQueueLengthNPE() {
1101	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1101	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1102		try {
1103		lock.getWaitQueueLength(null);
1104		shouldThrow();
1105	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1105	>	} catch (NullPointerException success) {}
1106		}
1107
1108
#	Line 970 | Line 1110 | public class ReentrantReadWriteLockTest
1110		* getWaitingThreads throws NPE if null
1111		*/
1112		public void testGetWaitingThreadsNPE() {
1113	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1113	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1114		try {
1115		lock.getWaitingThreads(null);
1116		shouldThrow();
1117	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1117	>	} catch (NullPointerException success) {}
1118		}
1119
1120		/**
1121		* hasWaiters throws IAE if not owned
1122		*/
1123		public void testHasWaitersIAE() {
1124	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1125	<	final Condition c = (lock.writeLock().newCondition());
1126	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1124	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1125	>	final Condition c = lock.writeLock().newCondition();
1126	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1127		try {
1128		lock2.hasWaiters(c);
1129		shouldThrow();
1130	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1130	>	} catch (IllegalArgumentException success) {}
1131		}
1132
1133		/**
1134		* hasWaiters throws IMSE if not locked
1135		*/
1136		public void testHasWaitersIMSE() {
1137	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1138	<	final Condition c = (lock.writeLock().newCondition());
1137	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1138	>	final Condition c = lock.writeLock().newCondition();
1139		try {
1140		lock.hasWaiters(c);
1141		shouldThrow();
1142	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1142	>	} catch (IllegalMonitorStateException success) {}
1143		}
1144
1145
#	Line 1016 | Line 1147 | public class ReentrantReadWriteLockTest
1147		* getWaitQueueLength throws IAE if not owned
1148		*/
1149		public void testGetWaitQueueLengthIAE() {
1150	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1151	<	final Condition c = (lock.writeLock().newCondition());
1152	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1150	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1151	>	final Condition c = lock.writeLock().newCondition();
1152	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1153		try {
1154		lock2.getWaitQueueLength(c);
1155		shouldThrow();
1156	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1156	>	} catch (IllegalArgumentException success) {}
1157		}
1158
1159		/**
1160		* getWaitQueueLength throws IMSE if not locked
1161		*/
1162		public void testGetWaitQueueLengthIMSE() {
1163	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1164	<	final Condition c = (lock.writeLock().newCondition());
1163	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1164	>	final Condition c = lock.writeLock().newCondition();
1165		try {
1166		lock.getWaitQueueLength(c);
1167		shouldThrow();
1168	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1168	>	} catch (IllegalMonitorStateException success) {}
1169		}
1170
1171
#	Line 1048 | Line 1173 | public class ReentrantReadWriteLockTest
1173		* getWaitingThreads throws IAE if not owned
1174		*/
1175		public void testGetWaitingThreadsIAE() {
1176	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1177	<	final Condition c = (lock.writeLock().newCondition());
1178	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1176	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1177	>	final Condition c = lock.writeLock().newCondition();
1178	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1179		try {
1180		lock2.getWaitingThreads(c);
1181		shouldThrow();
1182	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1182	>	} catch (IllegalArgumentException success) {}
1183		}
1184
1185		/**
1186		* getWaitingThreads throws IMSE if not locked
1187		*/
1188		public void testGetWaitingThreadsIMSE() {
1189	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1190	<	final Condition c = (lock.writeLock().newCondition());
1189	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1190	>	final Condition c = lock.writeLock().newCondition();
1191		try {
1192		lock.getWaitingThreads(c);
1193		shouldThrow();
1194	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1194	>	} catch (IllegalMonitorStateException success) {}
1195		}
1196
1197
1198		/**
1199		* hasWaiters returns true when a thread is waiting, else false
1200		*/
1201	<	public void testHasWaiters() {
1202	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1203	<	final Condition c = (lock.writeLock().newCondition());
1204	<	Thread t = new Thread(new Runnable() {
1205	<	public void run() {
1206	<	try {
1207	<	lock.writeLock().lock();
1208	<	threadAssertFalse(lock.hasWaiters(c));
1209	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1210	<	c.await();
1211	<	lock.writeLock().unlock();
1212	<	}
1213	<	catch(InterruptedException e) {
1214	<	threadUnexpectedException();
1215	<	}
1216	<	}
1217	<	});
1218	<
1219	<	try {
1220	<	t.start();
1221	<	Thread.sleep(SHORT_DELAY_MS);
1222	<	lock.writeLock().lock();
1223	<	assertTrue(lock.hasWaiters(c));
1224	<	assertEquals(1, lock.getWaitQueueLength(c));
1225	<	c.signal();
1107	<	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	<	}
1201	>	public void testHasWaiters() throws InterruptedException {
1202	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1203	>	final Condition c = lock.writeLock().newCondition();
1204	>	Thread t = newStartedThread(new CheckedRunnable() {
1205	>	public void realRun() throws InterruptedException {
1206	>	lock.writeLock().lock();
1207	>	assertFalse(lock.hasWaiters(c));
1208	>	assertEquals(0, lock.getWaitQueueLength(c));
1209	>	c.await();
1210	>	lock.writeLock().unlock();
1211	>	}});
1212	>
1213	>	Thread.sleep(SHORT_DELAY_MS);
1214	>	lock.writeLock().lock();
1215	>	assertTrue(lock.hasWaiters(c));
1216	>	assertEquals(1, lock.getWaitQueueLength(c));
1217	>	c.signal();
1218	>	lock.writeLock().unlock();
1219	>	Thread.sleep(SHORT_DELAY_MS);
1220	>	lock.writeLock().lock();
1221	>	assertFalse(lock.hasWaiters(c));
1222	>	assertEquals(0, lock.getWaitQueueLength(c));
1223	>	lock.writeLock().unlock();
1224	>	t.join(SHORT_DELAY_MS);
1225	>	assertFalse(t.isAlive());
1226		}
1227
1228		/**
1229		* getWaitQueueLength returns number of waiting threads
1230		*/
1231	<	public void testGetWaitQueueLength() {
1232	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1233	<	final Condition c = (lock.writeLock().newCondition());
1234	<	Thread t = new Thread(new Runnable() {
1235	<	public void run() {
1236	<	try {
1237	<	lock.writeLock().lock();
1238	<	threadAssertFalse(lock.hasWaiters(c));
1239	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1240	<	c.await();
1241	<	lock.writeLock().unlock();
1242	<	}
1243	<	catch(InterruptedException e) {
1244	<	threadUnexpectedException();
1245	<	}
1246	<	}
1247	<	});
1248	<
1249	<	try {
1250	<	t.start();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1252	<	lock.writeLock().lock();
1253	<	assertTrue(lock.hasWaiters(c));
1254	<	assertEquals(1, lock.getWaitQueueLength(c));
1255	<	c.signal();
1149	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
1231	>	public void testGetWaitQueueLength() throws InterruptedException {
1232	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1233	>	final Condition c = lock.writeLock().newCondition();
1234	>	Thread t = newStartedThread(new CheckedRunnable() {
1235	>	public void realRun() throws InterruptedException {
1236	>	lock.writeLock().lock();
1237	>	assertFalse(lock.hasWaiters(c));
1238	>	assertEquals(0, lock.getWaitQueueLength(c));
1239	>	c.await();
1240	>	lock.writeLock().unlock();
1241	>	}});
1242	>
1243	>	Thread.sleep(SHORT_DELAY_MS);
1244	>	lock.writeLock().lock();
1245	>	assertTrue(lock.hasWaiters(c));
1246	>	assertEquals(1, lock.getWaitQueueLength(c));
1247	>	c.signal();
1248	>	lock.writeLock().unlock();
1249	>	Thread.sleep(SHORT_DELAY_MS);
1250	>	lock.writeLock().lock();
1251	>	assertFalse(lock.hasWaiters(c));
1252	>	assertEquals(0, lock.getWaitQueueLength(c));
1253	>	lock.writeLock().unlock();
1254	>	t.join(SHORT_DELAY_MS);
1255	>	assertFalse(t.isAlive());
1256		}
1257
1258
1259		/**
1260		* getWaitingThreads returns only and all waiting threads
1261		*/
1262	<	public void testGetWaitingThreads() {
1263	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1262	>	public void testGetWaitingThreads() throws InterruptedException {
1263	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1264		final Condition c = lock.writeLock().newCondition();
1265	<	Thread t1 = new Thread(new Runnable() {
1266	<	public void run() {
1267	<	try {
1268	<	lock.writeLock().lock();
1269	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1270	<	c.await();
1271	<	lock.writeLock().unlock();
1272	<	}
1273	<	catch(InterruptedException e) {
1274	<	threadUnexpectedException();
1275	<	}
1276	<	}
1277	<	});
1278	<
1279	<	Thread t2 = new Thread(new Runnable() {
1280	<	public void run() {
1281	<	try {
1282	<	lock.writeLock().lock();
1283	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1284	<	c.await();
1285	<	lock.writeLock().unlock();
1286	<	}
1287	<	catch(InterruptedException e) {
1288	<	threadUnexpectedException();
1289	<	}
1290	<	}
1291	<	});
1292	<
1293	<	try {
1294	<	lock.writeLock().lock();
1295	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1296	<	lock.writeLock().unlock();
1297	<	t1.start();
1298	<	Thread.sleep(SHORT_DELAY_MS);
1299	<	t2.start();
1300	<	Thread.sleep(SHORT_DELAY_MS);
1301	<	lock.writeLock().lock();
1302	<	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	<	}
1265	>	Thread t1 = new Thread(new CheckedRunnable() {
1266	>	public void realRun() throws InterruptedException {
1267	>	lock.writeLock().lock();
1268	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1269	>	c.await();
1270	>	lock.writeLock().unlock();
1271	>	}});
1272	>
1273	>	Thread t2 = new Thread(new CheckedRunnable() {
1274	>	public void realRun() throws InterruptedException {
1275	>	lock.writeLock().lock();
1276	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1277	>	c.await();
1278	>	lock.writeLock().unlock();
1279	>	}});
1280	>
1281	>	lock.writeLock().lock();
1282	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1283	>	lock.writeLock().unlock();
1284	>	t1.start();
1285	>	Thread.sleep(SHORT_DELAY_MS);
1286	>	t2.start();
1287	>	Thread.sleep(SHORT_DELAY_MS);
1288	>	lock.writeLock().lock();
1289	>	assertTrue(lock.hasWaiters(c));
1290	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1291	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1292	>	c.signalAll();
1293	>	lock.writeLock().unlock();
1294	>	Thread.sleep(SHORT_DELAY_MS);
1295	>	lock.writeLock().lock();
1296	>	assertFalse(lock.hasWaiters(c));
1297	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1298	>	lock.writeLock().unlock();
1299	>	t1.join(SHORT_DELAY_MS);
1300	>	t2.join(SHORT_DELAY_MS);
1301	>	assertFalse(t1.isAlive());
1302	>	assertFalse(t2.isAlive());
1303		}
1304
1305		/**

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