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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 1.57 by dl, Sat May 7 11:15:04 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	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 write lock, checking that it had a hold count of 1.
63	>	*/
64	>	void releaseWriteLock(ReentrantReadWriteLock lock) {
65	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
66	>	assertTrue(writeLock.isHeldByCurrentThread());
67	>	writeLock.unlock();
68	>	assertFalse(writeLock.isHeldByCurrentThread());
69	>	}
70	>
71	>	/**
72	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
73	>	*/
74	>	void waitForQueuedThread(ReentrantReadWriteLock lock, Thread t) {
75	>	long startTime = System.nanoTime();
76	>	while (!lock.hasQueuedThread(t)) {
77	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
78	>	throw new AssertionError("timed out");
79	>	Thread.yield();
80		}
81		}
82
83		/**
84	+	* Checks that lock is not write-locked.
85	+	*/
86	+	void assertNotWriteLocked(ReentrantReadWriteLock lock) {
87	+	assertFalse(lock.isWriteLocked());
88	+	assertFalse(lock.isWriteLockedByCurrentThread());
89	+	assertEquals(0, lock.getWriteHoldCount());
90	+	}
91	+
92	+	/**
93	+	* Checks that condition c has no waiters.
94	+	*/
95	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
96	+	assertHasWaiters(lock, c, new Thread[] {});
97	+	}
98	+
99	+	/**
100	+	* Checks that condition c has exactly the given waiter threads.
101	+	*/
102	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
103	+	Thread... threads) {
104	+	lock.writeLock().lock();
105	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
106	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
107	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
108	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
109	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
110	+	new HashSet<Thread>(Arrays.asList(threads)));
111	+	lock.writeLock().unlock();
112	+	}
113	+
114	+	/**
115		* Constructor sets given fairness, and is in unlocked state
116		*/
117	<	public void testConstructor() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
117	>	public void testConstructor() {
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
119		assertFalse(rl.isFair());
120		assertFalse(rl.isWriteLocked());
121		assertEquals(0, rl.getReadLockCount());
122	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
122	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
123		assertTrue(r2.isFair());
124		assertFalse(r2.isWriteLocked());
125		assertEquals(0, r2.getReadLockCount());
126	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
127	+	assertFalse(r3.isFair());
128	+	assertFalse(r3.isWriteLocked());
129	+	assertEquals(0, r3.getReadLockCount());
130		}
131
132		/**
133		* write-locking and read-locking an unlocked lock succeed
134		*/
135	<	public void testLock() {
136	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
135	>	public void testLock() {
136	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
137		rl.writeLock().lock();
138		assertTrue(rl.isWriteLocked());
139		assertTrue(rl.isWriteLockedByCurrentThread());
140	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
141		assertEquals(0, rl.getReadLockCount());
142		rl.writeLock().unlock();
143		assertFalse(rl.isWriteLocked());
144		assertFalse(rl.isWriteLockedByCurrentThread());
145	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
146		assertEquals(0, rl.getReadLockCount());
147		rl.readLock().lock();
148		assertFalse(rl.isWriteLocked());
#	Line 99 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
102	–
157		/**
158		* locking an unlocked fair lock succeeds
159		*/
160	<	public void testFairLock() {
161	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
160	>	public void testFairLock() {
161	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
162		rl.writeLock().lock();
163		assertTrue(rl.isWriteLocked());
164		assertTrue(rl.isWriteLockedByCurrentThread());
165	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
166		assertEquals(0, rl.getReadLockCount());
167		rl.writeLock().unlock();
168		assertFalse(rl.isWriteLocked());
169		assertFalse(rl.isWriteLockedByCurrentThread());
170	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
171		assertEquals(0, rl.getReadLockCount());
172		rl.readLock().lock();
173		assertFalse(rl.isWriteLocked());
#	Line 126 | Line 182 | public class ReentrantReadWriteLockTest
182		/**
183		* getWriteHoldCount returns number of recursive holds
184		*/
185	+	public void testGetWriteHoldCount() {
186	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	+	for (int i = 1; i <= SIZE; i++) {
188	+	lock.writeLock().lock();
189	+	assertEquals(i,lock.getWriteHoldCount());
190	+	}
191	+	for (int i = SIZE; i > 0; i--) {
192	+	lock.writeLock().unlock();
193	+	assertEquals(i-1,lock.getWriteHoldCount());
194	+	}
195	+	}
196	+
197	+	/**
198	+	* WriteLock.getHoldCount returns number of recursive holds
199	+	*/
200		public void testGetHoldCount() {
201	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	for(int i = 1; i <= SIZE; i++) {
203	<	lock.writeLock().lock();
204	<	assertEquals(i,lock.getWriteHoldCount());
205	<	}
206	<	for(int i = SIZE; i > 0; i--) {
207	<	lock.writeLock().unlock();
208	<	assertEquals(i-1,lock.getWriteHoldCount());
209	<	}
201	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	for (int i = 1; i <= SIZE; i++) {
203	>	lock.writeLock().lock();
204	>	assertEquals(i,lock.writeLock().getHoldCount());
205	>	}
206	>	for (int i = SIZE; i > 0; i--) {
207	>	lock.writeLock().unlock();
208	>	assertEquals(i-1,lock.writeLock().getHoldCount());
209	>	}
210	>	}
211	>
212	>	/**
213	>	* getReadHoldCount returns number of recursive holds
214	>	*/
215	>	public void testGetReadHoldCount() {
216	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	>	for (int i = 1; i <= SIZE; i++) {
218	>	lock.readLock().lock();
219	>	assertEquals(i,lock.getReadHoldCount());
220	>	}
221	>	for (int i = SIZE; i > 0; i--) {
222	>	lock.readLock().unlock();
223	>	assertEquals(i-1,lock.getReadHoldCount());
224	>	}
225		}
140	–
226
227		/**
228		* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testUnlock_IllegalMonitorStateException() {
231	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	<	try {
233	<	rl.writeLock().unlock();
234	<	shouldThrow();
235	<	} catch(IllegalMonitorStateException success){}
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	>	try {
233	>	rl.writeLock().unlock();
234	>	shouldThrow();
235	>	} catch (IllegalMonitorStateException success) {}
236		}
237
238	+	/**
239	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
240	+	*/
241	+	public void testReadUnlock_IllegalMonitorStateException() {
242	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
243	+	try {
244	+	rl.readLock().unlock();
245	+	shouldThrow();
246	+	} catch (IllegalMonitorStateException success) {}
247	+	}
248
249		/**
250		* write-lockInterruptibly is interruptible
251		*/
252	<	public void testWriteLockInterruptibly_Interrupted() {
253	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run() {
256	<	try {
257	<	lock.writeLock().lockInterruptibly();
258	<	lock.writeLock().unlock();
259	<	lock.writeLock().lockInterruptibly();
260	<	lock.writeLock().unlock();
261	<	} catch(InterruptedException success){}
262	<	}
263	<	});
264	<	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	<	}
252	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
253	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	>	lock.writeLock().lock();
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256	>	public void realRun() throws InterruptedException {
257	>	lock.writeLock().lockInterruptibly();
258	>	}});
259	>
260	>	waitForQueuedThread(lock, t);
261	>	t.interrupt();
262	>	awaitTermination(t);
263	>	releaseWriteLock(lock);
264	>	}
265
266		/**
267		* timed write-tryLock is interruptible
268		*/
269	<	public void testWriteTryLock_Interrupted() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.writeLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	try {
275	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
276	<	} catch(InterruptedException success){}
277	<	}
278	<	});
279	<	try {
280	<	t.start();
195	<	t.interrupt();
196	<	lock.writeLock().unlock();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
200	<	}
269	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
273	>	public void realRun() throws InterruptedException {
274	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
275	>	}});
276	>
277	>	waitForQueuedThread(lock, t);
278	>	t.interrupt();
279	>	awaitTermination(t);
280	>	releaseWriteLock(lock);
281		}
282
283		/**
284		* read-lockInterruptibly is interruptible
285		*/
286	<	public void testReadLockInterruptibly_Interrupted() {
287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.writeLock().lock();
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run() {
291	<	try {
292	<	lock.readLock().lockInterruptibly();
293	<	} catch(InterruptedException success){}
294	<	}
295	<	});
296	<	try {
297	<	t.start();
298	<	t.interrupt();
219	<	lock.writeLock().unlock();
220	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
286	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
287	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	>	lock.writeLock().lock();
289	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
290	>	public void realRun() throws InterruptedException {
291	>	lock.readLock().lockInterruptibly();
292	>	}});
293	>
294	>	waitForQueuedThread(lock, t);
295	>	t.interrupt();
296	>	awaitTermination(t);
297	>	releaseWriteLock(lock);
298	>	}
299
300		/**
301		* timed read-tryLock is interruptible
302		*/
303	<	public void testReadTryLock_Interrupted() {
304	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	<	lock.writeLock().lock();
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	try {
309	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
310	<	threadShouldThrow();
311	<	} catch(InterruptedException success){}
312	<	}
313	<	});
314	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
303	>	public void testReadTryLock_Interrupted() throws InterruptedException {
304	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	>	lock.writeLock().lock();
306	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
309	>	}});
310	>
311	>	waitForQueuedThread(lock, t);
312	>	t.interrupt();
313	>	awaitTermination(t);
314	>	releaseWriteLock(lock);
315		}
316
249	–
317		/**
318		* write-tryLock fails if locked
319		*/
320	<	public void testWriteTryLockWhenLocked() {
321	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	<	lock.writeLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	threadAssertFalse(lock.writeLock().tryLock());
326	<	}
327	<	});
328	<	try {
329	<	t.start();
330	<	t.join();
264	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
320	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
321	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	>	lock.writeLock().lock();
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	assertFalse(lock.writeLock().tryLock());
326	>	}});
327	>
328	>	awaitTermination(t);
329	>	releaseWriteLock(lock);
330	>	}
331
332		/**
333		* read-tryLock fails if locked
334		*/
335	<	public void testReadTryLockWhenLocked() {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	threadAssertFalse(lock.readLock().tryLock());
341	<	}
342	<	});
343	<	try {
344	<	t.start();
345	<	t.join();
284	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
335	>	public void testReadTryLockWhenLocked() throws InterruptedException {
336	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	lock.writeLock().lock();
338	>	Thread t = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	assertFalse(lock.readLock().tryLock());
341	>	}});
342	>
343	>	awaitTermination(t);
344	>	releaseWriteLock(lock);
345	>	}
346
347		/**
348		* Multiple threads can hold a read lock when not write-locked
349		*/
350	<	public void testMultipleReadLocks() {
351	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	<	lock.readLock().lock();
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	threadAssertTrue(lock.readLock().tryLock());
356	<	lock.readLock().unlock();
357	<	}
358	<	});
359	<	try {
360	<	t.start();
361	<	t.join();
362	<	lock.readLock().unlock();
363	<	} catch(Exception e){
364	<	unexpectedException();
365	<	}
366	<	}
350	>	public void testMultipleReadLocks() throws InterruptedException {
351	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	>	lock.readLock().lock();
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() {
355	>	assertTrue(lock.readLock().tryLock());
356	>	lock.readLock().unlock();
357	>	}});
358	>
359	>	awaitTermination(t);
360	>	lock.readLock().unlock();
361	>	}
362	>
363	>	/**
364	>	* A writelock succeeds only after reading threads unlock
365	>	*/
366	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t1 = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	lock.readLock().lock();
372	>	lock.readLock().unlock();
373	>	}});
374	>	Thread t2 = newStartedThread(new CheckedRunnable() {
375	>	public void realRun() {
376	>	lock.writeLock().lock();
377	>	lock.writeLock().unlock();
378	>	}});
379	>	delay(SHORT_DELAY_MS);
380	>	lock.readLock().unlock();
381	>	awaitTermination(t1);
382	>	awaitTermination(t2);
383	>	assertNotWriteLocked(lock);
384	>	}
385	>
386	>	/**
387	>	* Readlocks succeed only after a writing thread unlocks
388	>	*/
389	>	public void testReadAfterWriteLock() throws InterruptedException {
390	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391	>	lock.writeLock().lock();
392	>	Thread t1 = newStartedThread(new CheckedRunnable() {
393	>	public void realRun() {
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	}});
397	>	Thread t2 = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}});
402	>
403	>	waitForQueuedThread(lock, t1);
404	>	waitForQueuedThread(lock, t2);
405	>	releaseWriteLock(lock);
406	>	awaitTermination(t1);
407	>	awaitTermination(t2);
408	>	}
409	>
410	>	/**
411	>	* Read trylock succeeds if write locked by current thread
412	>	*/
413	>	public void testReadHoldingWriteLock() {
414	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
415	>	lock.writeLock().lock();
416	>	assertTrue(lock.readLock().tryLock());
417	>	lock.readLock().unlock();
418	>	lock.writeLock().unlock();
419	>	}
420	>
421	>	/**
422	>	* Read lock succeeds if write locked by current thread even if
423	>	* other threads are waiting for readlock
424	>	*/
425	>	public void testReadHoldingWriteLock2() throws InterruptedException {
426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
427	>	lock.writeLock().lock();
428	>	lock.readLock().lock();
429	>	lock.readLock().unlock();
430	>
431	>	Thread t1 = newStartedThread(new CheckedRunnable() {
432	>	public void realRun() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}});
436	>	Thread t2 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.readLock().lock();
439	>	lock.readLock().unlock();
440	>	}});
441	>
442	>	waitForQueuedThread(lock, t1);
443	>	waitForQueuedThread(lock, t2);
444	>	assertTrue(lock.isWriteLockedByCurrentThread());
445	>	lock.readLock().lock();
446	>	lock.readLock().unlock();
447	>	releaseWriteLock(lock);
448	>	awaitTermination(t1);
449	>	awaitTermination(t2);
450	>	}
451	>
452	>	/**
453	>	* Read lock succeeds if write locked by current thread even if
454	>	* other threads are waiting for writelock
455	>	*/
456	>	public void testReadHoldingWriteLock3() throws InterruptedException {
457	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	lock.writeLock().lock();
459	>	lock.readLock().lock();
460	>	lock.readLock().unlock();
461	>
462	>	Thread t1 = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() {
464	>	lock.writeLock().lock();
465	>	lock.writeLock().unlock();
466	>	}});
467	>	Thread t2 = newStartedThread(new CheckedRunnable() {
468	>	public void realRun() {
469	>	lock.writeLock().lock();
470	>	lock.writeLock().unlock();
471	>	}});
472	>
473	>	waitForQueuedThread(lock, t1);
474	>	waitForQueuedThread(lock, t2);
475	>	assertTrue(lock.isWriteLockedByCurrentThread());
476	>	lock.readLock().lock();
477	>	lock.readLock().unlock();
478	>	releaseWriteLock(lock);
479	>	awaitTermination(t1);
480	>	awaitTermination(t2);
481	>	}
482	>
483	>	/**
484	>	* Write lock succeeds if write locked by current thread even if
485	>	* other threads are waiting for writelock
486	>	*/
487	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
488	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
489	>	lock.writeLock().lock();
490	>	lock.writeLock().lock();
491	>	lock.writeLock().unlock();
492	>
493	>	Thread t1 = newStartedThread(new CheckedRunnable() {
494	>	public void realRun() {
495	>	lock.writeLock().lock();
496	>	lock.writeLock().unlock();
497	>	}});
498	>	Thread t2 = newStartedThread(new CheckedRunnable() {
499	>	public void realRun() {
500	>	lock.writeLock().lock();
501	>	lock.writeLock().unlock();
502	>	}});
503	>
504	>	waitForQueuedThread(lock, t1);
505	>	waitForQueuedThread(lock, t2);
506	>	assertTrue(lock.isWriteLockedByCurrentThread());
507	>	assertEquals(1, lock.getWriteHoldCount());
508	>	lock.writeLock().lock();
509	>	assertTrue(lock.isWriteLockedByCurrentThread());
510	>	assertEquals(2, lock.getWriteHoldCount());
511	>	lock.writeLock().unlock();
512	>	releaseWriteLock(lock);
513	>	awaitTermination(t1);
514	>	awaitTermination(t2);
515	>	}
516	>
517	>	/**
518	>	* Fair Read trylock succeeds if write locked by current thread
519	>	*/
520	>	public void testReadHoldingWriteLockFair() {
521	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
522	>	lock.writeLock().lock();
523	>	assertTrue(lock.readLock().tryLock());
524	>	lock.readLock().unlock();
525	>	lock.writeLock().unlock();
526	>	}
527	>
528	>	/**
529	>	* Fair Read lock succeeds if write locked by current thread even if
530	>	* other threads are waiting for readlock
531	>	*/
532	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
533	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
534	>	lock.writeLock().lock();
535	>	lock.readLock().lock();
536	>	lock.readLock().unlock();
537	>
538	>	Thread t1 = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() {
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	}});
543	>	Thread t2 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() {
545	>	lock.readLock().lock();
546	>	lock.readLock().unlock();
547	>	}});
548	>
549	>	waitForQueuedThread(lock, t1);
550	>	waitForQueuedThread(lock, t2);
551	>	assertTrue(lock.isWriteLockedByCurrentThread());
552	>	lock.readLock().lock();
553	>	lock.readLock().unlock();
554	>	releaseWriteLock(lock);
555	>	awaitTermination(t1);
556	>	awaitTermination(t2);
557	>	}
558	>
559	>	/**
560	>	* Fair Read lock succeeds if write locked by current thread even if
561	>	* other threads are waiting for writelock
562	>	*/
563	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
564	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
565	>	lock.writeLock().lock();
566	>	lock.readLock().lock();
567	>	lock.readLock().unlock();
568	>
569	>	Thread t1 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.writeLock().lock();
572	>	lock.writeLock().unlock();
573	>	}});
574	>	Thread t2 = newStartedThread(new CheckedRunnable() {
575	>	public void realRun() {
576	>	lock.writeLock().lock();
577	>	lock.writeLock().unlock();
578	>	}});
579	>
580	>	waitForQueuedThread(lock, t1);
581	>	waitForQueuedThread(lock, t2);
582	>	assertTrue(lock.isWriteLockedByCurrentThread());
583	>	lock.readLock().lock();
584	>	lock.readLock().unlock();
585	>	releaseWriteLock(lock);
586	>	awaitTermination(t1);
587	>	awaitTermination(t2);
588	>	}
589	>
590	>	/**
591	>	* Fair Write lock succeeds if write locked by current thread even if
592	>	* other threads are waiting for writelock
593	>	*/
594	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
595	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596	>	lock.writeLock().lock();
597	>	Thread t1 = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	lock.writeLock().lock();
600	>	lock.writeLock().unlock();
601	>	}});
602	>	Thread t2 = newStartedThread(new CheckedRunnable() {
603	>	public void realRun() {
604	>	lock.writeLock().lock();
605	>	lock.writeLock().unlock();
606	>	}});
607	>
608	>	waitForQueuedThread(lock, t1);
609	>	waitForQueuedThread(lock, t2);
610	>	assertTrue(lock.isWriteLockedByCurrentThread());
611	>	assertEquals(1, lock.getWriteHoldCount());
612	>	lock.writeLock().lock();
613	>	assertEquals(2, lock.getWriteHoldCount());
614	>	lock.writeLock().unlock();
615	>	lock.writeLock().lock();
616	>	lock.writeLock().unlock();
617	>	releaseWriteLock(lock);
618	>	awaitTermination(t1);
619	>	awaitTermination(t2);
620	>	}
621
622		/**
623	<	* A writelock succeeds after reading threads unlock
623	>	* Read tryLock succeeds if readlocked but not writelocked
624		*/
625	<	public void testWriteAfterMultipleReadLocks() {
626	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627	<	lock.readLock().lock();
628	<	Thread t1 = new Thread(new Runnable() {
629	<	public void run() {
630	<	lock.readLock().lock();
631	<	lock.readLock().unlock();
632	<	}
322	<	});
323	<	Thread t2 = new Thread(new Runnable() {
324	<	public void run() {
325	<	lock.writeLock().lock();
326	<	lock.writeLock().unlock();
327	<	}
328	<	});
625	>	public void testTryLockWhenReadLocked() throws InterruptedException {
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertTrue(lock.readLock().tryLock());
631	>	lock.readLock().unlock();
632	>	}});
633
634	<	try {
635	<	t1.start();
636	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	lock.readLock().unlock();
335	<	t1.join(MEDIUM_DELAY_MS);
336	<	t2.join(MEDIUM_DELAY_MS);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
634	>	awaitTermination(t);
635	>	lock.readLock().unlock();
636	>	}
637
638		/**
639	<	* Readlocks succeed after a writing thread unlocks
639	>	* write tryLock fails when readlocked
640		*/
641	<	public void testReadAfterWriteLock() {
642	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	<	lock.writeLock().lock();
644	<	Thread t1 = new Thread(new Runnable() {
645	<	public void run() {
646	<	lock.readLock().lock();
647	<	lock.readLock().unlock();
355	<	}
356	<	});
357	<	Thread t2 = new Thread(new Runnable() {
358	<	public void run() {
359	<	lock.readLock().lock();
360	<	lock.readLock().unlock();
361	<	}
362	<	});
363	<
364	<	try {
365	<	t1.start();
366	<	t2.start();
367	<	Thread.sleep(SHORT_DELAY_MS);
368	<	lock.writeLock().unlock();
369	<	t1.join(MEDIUM_DELAY_MS);
370	<	t2.join(MEDIUM_DELAY_MS);
371	<	assertTrue(!t1.isAlive());
372	<	assertTrue(!t2.isAlive());
373	<
374	<	} catch(Exception e){
375	<	unexpectedException();
376	<	}
377	<	}
641	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
642	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	>	lock.readLock().lock();
644	>	Thread t = newStartedThread(new CheckedRunnable() {
645	>	public void realRun() {
646	>	assertFalse(lock.writeLock().tryLock());
647	>	}});
648
649	+	awaitTermination(t);
650	+	lock.readLock().unlock();
651	+	}
652
653		/**
654	<	* Read tryLock succeeds if readlocked but not writelocked
654	>	* Fair Read tryLock succeeds if readlocked but not writelocked
655		*/
656	<	public void testTryLockWhenReadLocked() {
657	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
658	<	lock.readLock().lock();
659	<	Thread t = new Thread(new Runnable() {
660	<	public void run() {
661	<	threadAssertTrue(lock.readLock().tryLock());
662	<	lock.readLock().unlock();
663	<	}
391	<	});
392	<	try {
393	<	t.start();
394	<	t.join();
395	<	lock.readLock().unlock();
396	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
656	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
657	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
658	>	lock.readLock().lock();
659	>	Thread t = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	assertTrue(lock.readLock().tryLock());
662	>	lock.readLock().unlock();
663	>	}});
664
665	<
665	>	awaitTermination(t);
666	>	lock.readLock().unlock();
667	>	}
668
669		/**
670	<	* write tryLock fails when readlocked
670	>	* Fair write tryLock fails when readlocked
671		*/
672	<	public void testWriteTryLockWhenReadLocked() {
673	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
674	<	lock.readLock().lock();
675	<	Thread t = new Thread(new Runnable() {
676	<	public void run() {
677	<	threadAssertFalse(lock.writeLock().tryLock());
678	<	}
413	<	});
414	<	try {
415	<	t.start();
416	<	t.join();
417	<	lock.readLock().unlock();
418	<	} catch(Exception e){
419	<	unexpectedException();
420	<	}
421	<	}
672	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
673	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	>	lock.readLock().lock();
675	>	Thread t = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	assertFalse(lock.writeLock().tryLock());
678	>	}});
679
680	<
680	>	awaitTermination(t);
681	>	lock.readLock().unlock();
682	>	}
683
684		/**
685		* write timed tryLock times out if locked
686		*/
687	<	public void testWriteTryLock_Timeout() {
688	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	<	lock.writeLock().lock();
690	<	Thread t = new Thread(new Runnable() {
691	<	public void run() {
692	<	try {
693	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
694	<	} catch (Exception ex) {
695	<	threadUnexpectedException();
696	<	}
697	<	}
698	<	});
440	<	try {
441	<	t.start();
442	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
687	>	public void testWriteTryLock_Timeout() throws InterruptedException {
688	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	>	lock.writeLock().lock();
690	>	Thread t = newStartedThread(new CheckedRunnable() {
691	>	public void realRun() throws InterruptedException {
692	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693	>	}});
694	>
695	>	awaitTermination(t);
696	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
697	>	lock.writeLock().unlock();
698	>	}
699
700		/**
701		* read timed tryLock times out if write-locked
702		*/
703	<	public void testReadTryLock_Timeout() {
704	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	<	lock.writeLock().lock();
706	<	Thread t = new Thread(new Runnable() {
707	<	public void run() {
708	<	try {
709	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
710	<	} catch (Exception ex) {
711	<	threadUnexpectedException();
712	<	}
713	<	}
714	<	});
464	<	try {
465	<	t.start();
466	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
472	<
703	>	public void testReadTryLock_Timeout() throws InterruptedException {
704	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	lock.writeLock().lock();
706	>	Thread t = newStartedThread(new CheckedRunnable() {
707	>	public void realRun() throws InterruptedException {
708	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
709	>	}});
710	>
711	>	awaitTermination(t);
712	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
713	>	lock.writeLock().unlock();
714	>	}
715
716		/**
717		* write lockInterruptibly succeeds if lock free else is interruptible
718		*/
719	<	public void testWriteLockInterruptibly() {
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.writeLock().lockInterruptibly();
730	<	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	<	}
719	>	public void testWriteLockInterruptibly() throws InterruptedException {
720	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	>	lock.writeLock().lockInterruptibly();
722	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
723	>	public void realRun() throws InterruptedException {
724	>	lock.writeLock().lockInterruptibly();
725	>	}});
726	>
727	>	waitForQueuedThread(lock, t);
728	>	t.interrupt();
729	>	awaitTermination(t);
730	>	releaseWriteLock(lock);
731		}
732
733		/**
734	<	*  read lockInterruptibly succeeds if lock free else is interruptible
734	>	* read lockInterruptibly succeeds if lock free else is interruptible
735		*/
736	<	public void testReadLockInterruptibly() {
737	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738	<	try {
739	<	lock.writeLock().lockInterruptibly();
740	<	} catch(Exception e) {
741	<	unexpectedException();
742	<	}
743	<	Thread t = new Thread(new Runnable() {
744	<	public void run() {
745	<	try {
746	<	lock.readLock().lockInterruptibly();
747	<	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	<	}
736	>	public void testReadLockInterruptibly() throws InterruptedException {
737	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738	>	lock.writeLock().lockInterruptibly();
739	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	lock.readLock().lockInterruptibly();
742	>	}});
743	>
744	>	waitForQueuedThread(lock, t);
745	>	t.interrupt();
746	>	awaitTermination(t);
747	>	releaseWriteLock(lock);
748		}
749
750		/**
751		* Calling await without holding lock throws IllegalMonitorStateException
752		*/
753	<	public void testAwait_IllegalMonitor() {
754	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
753	>	public void testAwait_IllegalMonitor() throws InterruptedException {
754	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
755		final Condition c = lock.writeLock().newCondition();
756		try {
757		c.await();
758		shouldThrow();
759	<	}
760	<	catch (IllegalMonitorStateException success) {
761	<	}
546	<	catch (Exception ex) {
759	>	} catch (IllegalMonitorStateException success) {}
760	>	try {
761	>	c.await(LONG_DELAY_MS, MILLISECONDS);
762		shouldThrow();
763	<	}
763	>	} catch (IllegalMonitorStateException success) {}
764	>	try {
765	>	c.awaitNanos(100);
766	>	shouldThrow();
767	>	} catch (IllegalMonitorStateException success) {}
768	>	try {
769	>	c.awaitUninterruptibly();
770	>	shouldThrow();
771	>	} catch (IllegalMonitorStateException success) {}
772		}
773
774		/**
775		* Calling signal without holding lock throws IllegalMonitorStateException
776		*/
777		public void testSignal_IllegalMonitor() {
778	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
778	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
779		final Condition c = lock.writeLock().newCondition();
780		try {
781		c.signal();
782		shouldThrow();
783	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
783	>	} catch (IllegalMonitorStateException success) {}
784		}
785
786		/**
787	<	* awaitNanos without a signal times out
787	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
788		*/
789	<	public void testAwaitNanos_Timeout() {
790	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
789	>	public void testSignalAll_IllegalMonitor() {
790	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
791		final Condition c = lock.writeLock().newCondition();
792		try {
793	<	lock.writeLock().lock();
794	<	long t = c.awaitNanos(100);
795	<	assertTrue(t <= 0);
578	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
793	>	c.signalAll();
794	>	shouldThrow();
795	>	} catch (IllegalMonitorStateException success) {}
796		}
797
798	+	/**
799	+	* awaitNanos without a signal times out
800	+	*/
801	+	public void testAwaitNanos_Timeout() throws InterruptedException {
802	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803	+	final Condition c = lock.writeLock().newCondition();
804	+	lock.writeLock().lock();
805	+	long startTime = System.nanoTime();
806	+	long timeoutMillis = 10;
807	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
808	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
809	+	assertTrue(nanosRemaining <= 0);
810	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
811	+	lock.writeLock().unlock();
812	+	}
813
814		/**
815	<	*  timed await without a signal times out
815	>	* timed await without a signal times out
816		*/
817	<	public void testAwait_Timeout() {
818	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817	>	public void testAwait_Timeout() throws InterruptedException {
818	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819		final Condition c = lock.writeLock().newCondition();
820	<	try {
821	<	lock.writeLock().lock();
822	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
823	<	lock.writeLock().unlock();
824	<	}
825	<	catch (Exception ex) {
598	<	unexpectedException();
599	<	}
820	>	lock.writeLock().lock();
821	>	long startTime = System.nanoTime();
822	>	long timeoutMillis = 10;
823	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
824	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
825	>	lock.writeLock().unlock();
826		}
827
828		/**
829		* awaitUntil without a signal times out
830		*/
831	<	public void testAwaitUntil_Timeout() {
832	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831	>	public void testAwaitUntil_Timeout() throws InterruptedException {
832	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
833		final Condition c = lock.writeLock().newCondition();
834	<	try {
835	<	lock.writeLock().lock();
836	<	java.util.Date d = new java.util.Date();
837	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
612	<	lock.writeLock().unlock();
613	<	}
614	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
834	>	lock.writeLock().lock();
835	>	java.util.Date d = new java.util.Date();
836	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
837	>	lock.writeLock().unlock();
838		}
839
840		/**
841		* await returns when signalled
842		*/
843	<	public void testAwait() {
844	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
843	>	public void testAwait() throws InterruptedException {
844	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845		final Condition c = lock.writeLock().newCondition();
846	<	Thread t = new Thread(new Runnable() {
847	<	public void run() {
848	<	try {
849	<	lock.writeLock().lock();
850	<	c.await();
851	<	lock.writeLock().unlock();
852	<	}
853	<	catch(InterruptedException e) {
854	<	threadUnexpectedException();
855	<	}
856	<	}
857	<	});
858	<
859	<	try {
860	<	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();
649	<	}
846	>	final CountDownLatch locked = new CountDownLatch(1);
847	>	Thread t = newStartedThread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.writeLock().lock();
850	>	locked.countDown();
851	>	c.await();
852	>	lock.writeLock().unlock();
853	>	}});
854	>
855	>	locked.await();
856	>	lock.writeLock().lock();
857	>	c.signal();
858	>	assertTrue(t.isAlive());
859	>	lock.writeLock().unlock();
860	>	awaitTermination(t);
861		}
862
863		/**
864		* awaitUninterruptibly doesn't abort on interrupt
865		*/
866	<	public void testAwaitUninterruptibly() {
867	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
866	>	public void testAwaitUninterruptibly() throws InterruptedException {
867	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868		final Condition c = lock.writeLock().newCondition();
869	<	Thread t = new Thread(new Runnable() {
870	<	public void run() {
871	<	lock.writeLock().lock();
872	<	c.awaitUninterruptibly();
873	<	lock.writeLock().unlock();
874	<	}
875	<	});
876	<
877	<	try {
878	<	t.start();
879	<	Thread.sleep(SHORT_DELAY_MS);
880	<	t.interrupt();
881	<	lock.writeLock().lock();
882	<	c.signal();
883	<	lock.writeLock().unlock();
884	<	assert(t.isInterrupted());
885	<	t.join(SHORT_DELAY_MS);
886	<	assertFalse(t.isAlive());
887	<	}
888	<	catch (Exception ex) {
889	<	unexpectedException();
679	<	}
869	>	final CountDownLatch locked = new CountDownLatch(1);
870	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
871	>	Thread t = newStartedThread(new CheckedRunnable() {
872	>	public void realRun() {
873	>	lock.writeLock().lock();
874	>	locked.countDown();
875	>	c.awaitUninterruptibly();
876	>	assertTrue(Thread.interrupted());
877	>	lock.writeLock().unlock();
878	>	}});
879	>
880	>	locked.await();
881	>	lock.writeLock().lock();
882	>	lock.writeLock().unlock();
883	>	t.interrupt();
884	>	t.join(10);
885	>	assertTrue(t.isAlive());
886	>	lock.writeLock().lock();
887	>	c.signal();
888	>	lock.writeLock().unlock();
889	>	awaitTermination(t);
890		}
891
892		/**
893		* await is interruptible
894		*/
895	<	public void testAwait_Interrupt() {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
895	>	public void testAwait_Interrupt() throws InterruptedException {
896	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
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.await();
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);
914	<	t.interrupt();
915	<	t.join(SHORT_DELAY_MS);
916	<	assertFalse(t.isAlive());
917	<	}
918	<	catch (Exception ex) {
919	<	unexpectedException();
920	<	}
898	>	final CountDownLatch locked = new CountDownLatch(1);
899	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
900	>	public void realRun() throws InterruptedException {
901	>	lock.writeLock().lock();
902	>	assertTrue(lock.isWriteLocked());
903	>	assertTrue(lock.isWriteLockedByCurrentThread());
904	>	assertHasNoWaiters(lock, c);
905	>	locked.countDown();
906	>	try {
907	>	c.await();
908	>	} finally {
909	>	assertTrue(lock.isWriteLocked());
910	>	assertTrue(lock.isWriteLockedByCurrentThread());
911	>	assertHasNoWaiters(lock, c);
912	>	lock.writeLock().unlock();
913	>	assertFalse(Thread.interrupted());
914	>	}
915	>	}});
916	>
917	>	locked.await();
918	>	assertHasWaiters(lock, c, t);
919	>	t.interrupt();
920	>	awaitTermination(t);
921	>	assertFalse(lock.isWriteLocked());
922		}
923
924		/**
925		* awaitNanos is interruptible
926		*/
927	<	public void testAwaitNanos_Interrupt() {
928	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
927	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
928	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
929		final Condition c = lock.writeLock().newCondition();
930	<	Thread t = new Thread(new Runnable() {
931	<	public void run() {
932	<	try {
933	<	lock.writeLock().lock();
934	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
935	<	lock.writeLock().unlock();
936	<	threadShouldThrow();
937	<	}
938	<	catch(InterruptedException success) {
939	<	}
940	<	}
941	<	});
942	<
943	<	try {
944	<	t.start();
945	<	Thread.sleep(SHORT_DELAY_MS);
946	<	t.interrupt();
947	<	t.join(SHORT_DELAY_MS);
948	<	assertFalse(t.isAlive());
949	<	}
950	<	catch (Exception ex) {
951	<	unexpectedException();
952	<	}
930	>	final CountDownLatch locked = new CountDownLatch(1);
931	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
932	>	public void realRun() throws InterruptedException {
933	>	lock.writeLock().lock();
934	>	assertTrue(lock.isWriteLocked());
935	>	assertTrue(lock.isWriteLockedByCurrentThread());
936	>	assertHasNoWaiters(lock, c);
937	>	locked.countDown();
938	>	try {
939	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
940	>	} finally {
941	>	assertTrue(lock.isWriteLocked());
942	>	assertTrue(lock.isWriteLockedByCurrentThread());
943	>	assertHasNoWaiters(lock, c);
944	>	lock.writeLock().unlock();
945	>	assertFalse(Thread.interrupted());
946	>	}
947	>	}});
948	>
949	>	locked.await();
950	>	assertHasWaiters(lock, c, t);
951	>	t.interrupt();
952	>	awaitTermination(t);
953	>	assertFalse(lock.isWriteLocked());
954		}
955
956		/**
957		* awaitUntil is interruptible
958		*/
959	<	public void testAwaitUntil_Interrupt() {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
959	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
960	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
961		final Condition c = lock.writeLock().newCondition();
962	<	Thread t = new Thread(new Runnable() {
963	<	public void run() {
964	<	try {
965	<	lock.writeLock().lock();
966	<	java.util.Date d = new java.util.Date();
967	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
968	<	lock.writeLock().unlock();
969	<	threadShouldThrow();
970	<	}
971	<	catch(InterruptedException success) {
972	<	}
973	<	}
974	<	});
975	<
976	<	try {
977	<	t.start();
978	<	Thread.sleep(SHORT_DELAY_MS);
979	<	t.interrupt();
980	<	t.join(SHORT_DELAY_MS);
981	<	assertFalse(t.isAlive());
982	<	}
983	<	catch (Exception ex) {
984	<	unexpectedException();
985	<	}
962	>	final CountDownLatch locked = new CountDownLatch(1);
963	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
964	>	public void realRun() throws InterruptedException {
965	>	lock.writeLock().lock();
966	>	assertTrue(lock.isWriteLocked());
967	>	assertTrue(lock.isWriteLockedByCurrentThread());
968	>	assertHasNoWaiters(lock, c);
969	>	locked.countDown();
970	>	java.util.Date d = new java.util.Date();
971	>	try {
972	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
973	>	} finally {
974	>	assertTrue(lock.isWriteLocked());
975	>	assertTrue(lock.isWriteLockedByCurrentThread());
976	>	assertHasNoWaiters(lock, c);
977	>	lock.writeLock().unlock();
978	>	assertFalse(Thread.interrupted());
979	>	}
980	>	}});
981	>
982	>	locked.await();
983	>	assertHasWaiters(lock, c, t);
984	>	t.interrupt();
985	>	awaitTermination(t);
986	>	assertFalse(lock.isWriteLocked());
987		}
988
989		/**
990		* signalAll wakes up all threads
991		*/
992	<	public void testSignalAll() {
993	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
992	>	public void testSignalAll() throws InterruptedException {
993	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
994		final Condition c = lock.writeLock().newCondition();
995	<	Thread t1 = new Thread(new Runnable() {
996	<	public void run() {
997	<	try {
998	<	lock.writeLock().lock();
999	<	c.await();
1000	<	lock.writeLock().unlock();
1001	<	}
1002	<	catch(InterruptedException e) {
1003	<	threadUnexpectedException();
1004	<	}
1005	<	}
1006	<	});
1007	<
1008	<	Thread t2 = new Thread(new Runnable() {
1009	<	public void run() {
1010	<	try {
1011	<	lock.writeLock().lock();
1012	<	c.await();
1013	<	lock.writeLock().unlock();
1014	<	}
1015	<	catch(InterruptedException e) {
1016	<	threadUnexpectedException();
1017	<	}
1018	<	}
1019	<	});
995	>	final CountDownLatch locked = new CountDownLatch(2);
996	>	final Lock writeLock = lock.writeLock();
997	>	Thread t1 = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() throws InterruptedException {
999	>	writeLock.lock();
1000	>	locked.countDown();
1001	>	c.await();
1002	>	writeLock.unlock();
1003	>	}});
1004	>
1005	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1006	>	public void realRun() throws InterruptedException {
1007	>	writeLock.lock();
1008	>	locked.countDown();
1009	>	c.await();
1010	>	writeLock.unlock();
1011	>	}});
1012	>
1013	>	locked.await();
1014	>	writeLock.lock();
1015	>	assertHasWaiters(lock, c, t1, t2);
1016	>	c.signalAll();
1017	>	assertHasNoWaiters(lock, c);
1018	>	writeLock.unlock();
1019	>	awaitTermination(t1);
1020	>	awaitTermination(t2);
1021	>	}
1022
1023	<	try {
1024	<	t1.start();
1025	<	t2.start();
1026	<	Thread.sleep(SHORT_DELAY_MS);
1027	<	lock.writeLock().lock();
1028	<	c.signalAll();
1029	<	lock.writeLock().unlock();
1030	<	t1.join(SHORT_DELAY_MS);
1031	<	t2.join(SHORT_DELAY_MS);
1032	<	assertFalse(t1.isAlive());
1033	<	assertFalse(t2.isAlive());
1034	<	}
1035	<	catch (Exception ex) {
1036	<	unexpectedException();
1037	<	}
1023	>	/**
1024	>	* signal wakes up waiting threads in FIFO order.
1025	>	*/
1026	>	public void testSignalWakesFifo() throws InterruptedException {
1027	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1028	>	final Condition c = lock.writeLock().newCondition();
1029	>	final CountDownLatch locked1 = new CountDownLatch(1);
1030	>	final CountDownLatch locked2 = new CountDownLatch(1);
1031	>	final Lock writeLock = lock.writeLock();
1032	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	writeLock.lock();
1035	>	locked1.countDown();
1036	>	c.await();
1037	>	writeLock.unlock();
1038	>	}});
1039	>
1040	>	locked1.await();
1041	>
1042	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1043	>	public void realRun() throws InterruptedException {
1044	>	writeLock.lock();
1045	>	locked2.countDown();
1046	>	c.await();
1047	>	writeLock.unlock();
1048	>	}});
1049	>
1050	>	locked2.await();
1051	>
1052	>	writeLock.lock();
1053	>	assertHasWaiters(lock, c, t1, t2);
1054	>	assertFalse(lock.hasQueuedThreads());
1055	>	c.signal();
1056	>	assertHasWaiters(lock, c, t2);
1057	>	assertTrue(lock.hasQueuedThread(t1));
1058	>	assertFalse(lock.hasQueuedThread(t2));
1059	>	c.signal();
1060	>	assertHasNoWaiters(lock, c);
1061	>	assertTrue(lock.hasQueuedThread(t1));
1062	>	assertTrue(lock.hasQueuedThread(t2));
1063	>	writeLock.unlock();
1064	>	awaitTermination(t1);
1065	>	awaitTermination(t2);
1066		}
1067
1068		/**
1069		* A serialized lock deserializes as unlocked
1070		*/
1071	<	public void testSerialization() {
1071	>	public void testSerialization() throws Exception {
1072		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1073		l.readLock().lock();
1074		l.readLock().unlock();
1075
1076	<	try {
1077	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1078	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1079	<	out.writeObject(l);
1080	<	out.close();
1081	<
1082	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1083	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1084	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1085	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
1076	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1077	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1078	>	out.writeObject(l);
1079	>	out.close();
1080	>
1081	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1082	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1083	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1084	>	r.readLock().lock();
1085	>	r.readLock().unlock();
1086		}
1087
1088		/**
1089		* hasQueuedThreads reports whether there are waiting threads
1090		*/
1091	<	public void testhasQueuedThreads() {
1092	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1091	>	public void testhasQueuedThreads() throws InterruptedException {
1092	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1093		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1094		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1095	+	assertFalse(lock.hasQueuedThreads());
1096	+	lock.writeLock().lock();
1097	+	assertFalse(lock.hasQueuedThreads());
1098	+	long startTime = System.nanoTime();
1099	+	t1.start();
1100	+	waitForQueuedThread(lock, t1);
1101	+	t2.start();
1102	+	waitForQueuedThread(lock, t2);
1103	+	assertTrue(lock.hasQueuedThreads());
1104	+	t1.interrupt();
1105	+	awaitTermination(t1);
1106	+	assertTrue(lock.hasQueuedThreads());
1107	+	lock.writeLock().unlock();
1108	+	awaitTermination(t2);
1109	+	assertFalse(lock.hasQueuedThreads());
1110	+	}
1111	+
1112	+	/**
1113	+	* hasQueuedThread(null) throws NPE
1114	+	*/
1115	+	public void testHasQueuedThreadNPE() {
1116	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1117		try {
1118	<	assertFalse(lock.hasQueuedThreads());
1119	<	lock.writeLock().lock();
1120	<	t1.start();
1121	<	Thread.sleep(SHORT_DELAY_MS);
1122	<	assertTrue(lock.hasQueuedThreads());
1123	<	t2.start();
1124	<	Thread.sleep(SHORT_DELAY_MS);
1125	<	assertTrue(lock.hasQueuedThreads());
1126	<	t1.interrupt();
1127	<	Thread.sleep(SHORT_DELAY_MS);
1128	<	assertTrue(lock.hasQueuedThreads());
1129	<	lock.writeLock().unlock();
1130	<	Thread.sleep(SHORT_DELAY_MS);
1131	<	assertFalse(lock.hasQueuedThreads());
1132	<	t1.join();
1133	<	t2.join();
1134	<	} catch(Exception e){
1135	<	unexpectedException();
1136	<	}
1137	<	}
1118	>	sync.hasQueuedThread(null);
1119	>	shouldThrow();
1120	>	} catch (NullPointerException success) {}
1121	>	}
1122	>
1123	>	/**
1124	>	* hasQueuedThread reports whether a thread is queued.
1125	>	*/
1126	>	public void testHasQueuedThread() throws InterruptedException {
1127	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1128	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1129	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1130	>	assertFalse(lock.hasQueuedThread(t1));
1131	>	assertFalse(lock.hasQueuedThread(t2));
1132	>	lock.writeLock().lock();
1133	>	long startTime = System.nanoTime();
1134	>	t1.start();
1135	>	waitForQueuedThread(lock, t1);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	t2.start();
1139	>	waitForQueuedThread(lock, t2);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	t1.interrupt();
1143	>	awaitTermination(t1);
1144	>	assertFalse(lock.hasQueuedThread(t1));
1145	>	assertTrue(lock.hasQueuedThread(t2));
1146	>	lock.writeLock().unlock();
1147	>	awaitTermination(t2);
1148	>	assertFalse(lock.hasQueuedThread(t1));
1149	>	assertFalse(lock.hasQueuedThread(t2));
1150	>	}
1151
1152		/**
1153		* getQueueLength reports number of waiting threads
1154		*/
1155	<	public void testGetQueueLength() {
1156	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1155	>	public void testGetQueueLength() throws InterruptedException {
1156	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1158		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1159	<	try {
1160	<	assertEquals(0, lock.getQueueLength());
1161	<	lock.writeLock().lock();
1162	<	t1.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1164	<	assertEquals(1, lock.getQueueLength());
1165	<	t2.start();
1166	<	Thread.sleep(SHORT_DELAY_MS);
1167	<	assertEquals(2, lock.getQueueLength());
1168	<	t1.interrupt();
1169	<	Thread.sleep(SHORT_DELAY_MS);
1170	<	assertEquals(1, lock.getQueueLength());
1171	<	lock.writeLock().unlock();
1172	<	Thread.sleep(SHORT_DELAY_MS);
1173	<	assertEquals(0, lock.getQueueLength());
1174	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1159	>	assertEquals(0, lock.getQueueLength());
1160	>	lock.writeLock().lock();
1161	>	long startTime = System.nanoTime();
1162	>	t1.start();
1163	>	waitForQueuedThread(lock, t1);
1164	>	assertEquals(1, lock.getQueueLength());
1165	>	t2.start();
1166	>	waitForQueuedThread(lock, t2);
1167	>	assertEquals(2, lock.getQueueLength());
1168	>	t1.interrupt();
1169	>	awaitTermination(t1);
1170	>	assertEquals(1, lock.getQueueLength());
1171	>	lock.writeLock().unlock();
1172	>	awaitTermination(t2);
1173	>	assertEquals(0, lock.getQueueLength());
1174	>	}
1175
1176		/**
1177		* getQueuedThreads includes waiting threads
1178		*/
1179	<	public void testGetQueuedThreads() {
1180	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1179	>	public void testGetQueuedThreads() throws InterruptedException {
1180	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1181		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1182		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1183	<	try {
1184	<	assertTrue(lock.getQueuedThreads().isEmpty());
1185	<	lock.writeLock().lock();
1186	<	assertTrue(lock.getQueuedThreads().isEmpty());
1187	<	t1.start();
1188	<	Thread.sleep(SHORT_DELAY_MS);
1189	<	assertTrue(lock.getQueuedThreads().contains(t1));
1190	<	t2.start();
1191	<	Thread.sleep(SHORT_DELAY_MS);
1192	<	assertTrue(lock.getQueuedThreads().contains(t1));
1193	<	assertTrue(lock.getQueuedThreads().contains(t2));
1194	<	t1.interrupt();
1195	<	Thread.sleep(SHORT_DELAY_MS);
1196	<	assertFalse(lock.getQueuedThreads().contains(t1));
1197	<	assertTrue(lock.getQueuedThreads().contains(t2));
1198	<	lock.writeLock().unlock();
1199	<	Thread.sleep(SHORT_DELAY_MS);
1200	<	assertTrue(lock.getQueuedThreads().isEmpty());
1201	<	t1.join();
1202	<	t2.join();
1203	<	} catch(Exception e){
1204	<	unexpectedException();
937	<	}
938	<	}
1183	>	assertTrue(lock.getQueuedThreads().isEmpty());
1184	>	lock.writeLock().lock();
1185	>	long startTime = System.nanoTime();
1186	>	assertTrue(lock.getQueuedThreads().isEmpty());
1187	>	t1.start();
1188	>	waitForQueuedThread(lock, t1);
1189	>	assertEquals(1, lock.getQueuedThreads().size());
1190	>	assertTrue(lock.getQueuedThreads().contains(t1));
1191	>	t2.start();
1192	>	waitForQueuedThread(lock, t2);
1193	>	assertEquals(2, lock.getQueuedThreads().size());
1194	>	assertTrue(lock.getQueuedThreads().contains(t1));
1195	>	assertTrue(lock.getQueuedThreads().contains(t2));
1196	>	t1.interrupt();
1197	>	awaitTermination(t1);
1198	>	assertFalse(lock.getQueuedThreads().contains(t1));
1199	>	assertTrue(lock.getQueuedThreads().contains(t2));
1200	>	assertEquals(1, lock.getQueuedThreads().size());
1201	>	lock.writeLock().unlock();
1202	>	awaitTermination(t2);
1203	>	assertTrue(lock.getQueuedThreads().isEmpty());
1204	>	}
1205
1206		/**
1207		* hasWaiters throws NPE if null
1208		*/
1209		public void testHasWaitersNPE() {
1210	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1210	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1211		try {
1212		lock.hasWaiters(null);
1213		shouldThrow();
1214	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1214	>	} catch (NullPointerException success) {}
1215		}
1216
1217		/**
1218		* getWaitQueueLength throws NPE if null
1219		*/
1220		public void testGetWaitQueueLengthNPE() {
1221	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1221	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222		try {
1223		lock.getWaitQueueLength(null);
1224		shouldThrow();
1225	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1225	>	} catch (NullPointerException success) {}
1226		}
1227
968	–
1228		/**
1229		* getWaitingThreads throws NPE if null
1230		*/
1231		public void testGetWaitingThreadsNPE() {
1232	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1232	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1233		try {
1234		lock.getWaitingThreads(null);
1235		shouldThrow();
1236	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1236	>	} catch (NullPointerException success) {}
1237		}
1238
1239		/**
1240		* hasWaiters throws IAE if not owned
1241		*/
1242		public void testHasWaitersIAE() {
1243	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	<	final Condition c = (lock.writeLock().newCondition());
1245	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	>	final Condition c = lock.writeLock().newCondition();
1245	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1246		try {
1247		lock2.hasWaiters(c);
1248		shouldThrow();
1249	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1249	>	} catch (IllegalArgumentException success) {}
1250		}
1251
1252		/**
1253		* hasWaiters throws IMSE if not locked
1254		*/
1255		public void testHasWaitersIMSE() {
1256	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1257	<	final Condition c = (lock.writeLock().newCondition());
1256	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1257	>	final Condition c = lock.writeLock().newCondition();
1258		try {
1259		lock.hasWaiters(c);
1260		shouldThrow();
1261	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1261	>	} catch (IllegalMonitorStateException success) {}
1262		}
1263
1014	–
1264		/**
1265		* getWaitQueueLength throws IAE if not owned
1266		*/
1267		public void testGetWaitQueueLengthIAE() {
1268	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1269	<	final Condition c = (lock.writeLock().newCondition());
1270	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1269	>	final Condition c = lock.writeLock().newCondition();
1270	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1271		try {
1272		lock2.getWaitQueueLength(c);
1273		shouldThrow();
1274	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1274	>	} catch (IllegalArgumentException success) {}
1275		}
1276
1277		/**
1278		* getWaitQueueLength throws IMSE if not locked
1279		*/
1280		public void testGetWaitQueueLengthIMSE() {
1281	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1282	<	final Condition c = (lock.writeLock().newCondition());
1281	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1282	>	final Condition c = lock.writeLock().newCondition();
1283		try {
1284		lock.getWaitQueueLength(c);
1285		shouldThrow();
1286	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1286	>	} catch (IllegalMonitorStateException success) {}
1287		}
1288
1046	–
1289		/**
1290		* getWaitingThreads throws IAE if not owned
1291		*/
1292		public void testGetWaitingThreadsIAE() {
1293	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1294	<	final Condition c = (lock.writeLock().newCondition());
1295	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1293	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1294	>	final Condition c = lock.writeLock().newCondition();
1295	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1296		try {
1297		lock2.getWaitingThreads(c);
1298		shouldThrow();
1299	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1299	>	} catch (IllegalArgumentException success) {}
1300		}
1301
1302		/**
1303		* getWaitingThreads throws IMSE if not locked
1304		*/
1305		public void testGetWaitingThreadsIMSE() {
1306	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307	<	final Condition c = (lock.writeLock().newCondition());
1306	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307	>	final Condition c = lock.writeLock().newCondition();
1308		try {
1309		lock.getWaitingThreads(c);
1310		shouldThrow();
1311	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1311	>	} catch (IllegalMonitorStateException success) {}
1312		}
1313
1078	–
1314		/**
1315		* hasWaiters returns true when a thread is waiting, else false
1316		*/
1317	<	public void testHasWaiters() {
1318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1319	<	final Condition c = (lock.writeLock().newCondition());
1320	<	Thread t = new Thread(new Runnable() {
1321	<	public void run() {
1322	<	try {
1323	<	lock.writeLock().lock();
1324	<	threadAssertFalse(lock.hasWaiters(c));
1325	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1326	<	c.await();
1327	<	lock.writeLock().unlock();
1328	<	}
1329	<	catch(InterruptedException e) {
1330	<	threadUnexpectedException();
1331	<	}
1332	<	}
1333	<	});
1334	<
1335	<	try {
1336	<	t.start();
1337	<	Thread.sleep(SHORT_DELAY_MS);
1338	<	lock.writeLock().lock();
1339	<	assertTrue(lock.hasWaiters(c));
1105	<	assertEquals(1, lock.getWaitQueueLength(c));
1106	<	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	<	}
1317	>	public void testHasWaiters() throws InterruptedException {
1318	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1319	>	final Condition c = lock.writeLock().newCondition();
1320	>	final CountDownLatch locked = new CountDownLatch(1);
1321	>	Thread t = newStartedThread(new CheckedRunnable() {
1322	>	public void realRun() throws InterruptedException {
1323	>	lock.writeLock().lock();
1324	>	assertFalse(lock.hasWaiters(c));
1325	>	locked.countDown();
1326	>	assertEquals(0, lock.getWaitQueueLength(c));
1327	>	c.await();
1328	>	lock.writeLock().unlock();
1329	>	}});
1330	>
1331	>	locked.await();
1332	>	lock.writeLock().lock();
1333	>	assertTrue(lock.hasWaiters(c));
1334	>	assertEquals(1, lock.getWaitQueueLength(c));
1335	>	c.signal();
1336	>	assertHasNoWaiters(lock, c);
1337	>	lock.writeLock().unlock();
1338	>	awaitTermination(t);
1339	>	assertHasNoWaiters(lock, c);
1340		}
1341
1342		/**
1343		* getWaitQueueLength returns number of waiting threads
1344		*/
1345	<	public void testGetWaitQueueLength() {
1346	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1347	<	final Condition c = (lock.writeLock().newCondition());
1348	<	Thread t = new Thread(new Runnable() {
1349	<	public void run() {
1350	<	try {
1351	<	lock.writeLock().lock();
1352	<	threadAssertFalse(lock.hasWaiters(c));
1353	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1354	<	c.await();
1355	<	lock.writeLock().unlock();
1356	<	}
1357	<	catch(InterruptedException e) {
1358	<	threadUnexpectedException();
1359	<	}
1360	<	}
1361	<	});
1362	<
1363	<	try {
1364	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1366	<	lock.writeLock().lock();
1146	<	assertTrue(lock.hasWaiters(c));
1147	<	assertEquals(1, lock.getWaitQueueLength(c));
1148	<	c.signal();
1149	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
1345	>	public void testGetWaitQueueLength() throws InterruptedException {
1346	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1347	>	final Condition c = lock.writeLock().newCondition();
1348	>	final CountDownLatch locked = new CountDownLatch(1);
1349	>	Thread t = newStartedThread(new CheckedRunnable() {
1350	>	public void realRun() throws InterruptedException {
1351	>	lock.writeLock().lock();
1352	>	assertEquals(0, lock.getWaitQueueLength(c));
1353	>	locked.countDown();
1354	>	c.await();
1355	>	lock.writeLock().unlock();
1356	>	}});
1357	>
1358	>	locked.await();
1359	>	lock.writeLock().lock();
1360	>	assertHasWaiters(lock, c, t);
1361	>	assertEquals(1, lock.getWaitQueueLength(c));
1362	>	c.signal();
1363	>	assertHasNoWaiters(lock, c);
1364	>	assertEquals(0, lock.getWaitQueueLength(c));
1365	>	lock.writeLock().unlock();
1366	>	awaitTermination(t);
1367		}
1368
1163	–
1369		/**
1370		* getWaitingThreads returns only and all waiting threads
1371		*/
1372	<	public void testGetWaitingThreads() {
1373	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1372	>	public void testGetWaitingThreads() throws InterruptedException {
1373	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1374		final Condition c = lock.writeLock().newCondition();
1375	<	Thread t1 = new Thread(new Runnable() {
1376	<	public void run() {
1377	<	try {
1378	<	lock.writeLock().lock();
1379	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1380	<	c.await();
1381	<	lock.writeLock().unlock();
1382	<	}
1383	<	catch(InterruptedException e) {
1384	<	threadUnexpectedException();
1385	<	}
1386	<	}
1387	<	});
1388	<
1389	<	Thread t2 = new Thread(new Runnable() {
1390	<	public void run() {
1391	<	try {
1392	<	lock.writeLock().lock();
1393	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1394	<	c.await();
1395	<	lock.writeLock().unlock();
1396	<	}
1397	<	catch(InterruptedException e) {
1398	<	threadUnexpectedException();
1399	<	}
1400	<	}
1401	<	});
1375	>	final CountDownLatch locked1 = new CountDownLatch(1);
1376	>	final CountDownLatch locked2 = new CountDownLatch(1);
1377	>	Thread t1 = new Thread(new CheckedRunnable() {
1378	>	public void realRun() throws InterruptedException {
1379	>	lock.writeLock().lock();
1380	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1381	>	locked1.countDown();
1382	>	c.await();
1383	>	lock.writeLock().unlock();
1384	>	}});
1385	>
1386	>	Thread t2 = new Thread(new CheckedRunnable() {
1387	>	public void realRun() throws InterruptedException {
1388	>	lock.writeLock().lock();
1389	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1390	>	locked2.countDown();
1391	>	c.await();
1392	>	lock.writeLock().unlock();
1393	>	}});
1394	>
1395	>	lock.writeLock().lock();
1396	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1397	>	lock.writeLock().unlock();
1398	>
1399	>	t1.start();
1400	>	locked1.await();
1401	>	t2.start();
1402	>	locked2.await();
1403	>
1404	>	lock.writeLock().lock();
1405	>	assertTrue(lock.hasWaiters(c));
1406	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1407	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1408	>	assertEquals(2, lock.getWaitingThreads(c).size());
1409	>	c.signalAll();
1410	>	assertHasNoWaiters(lock, c);
1411	>	lock.writeLock().unlock();
1412
1413	<	try {
1414	<	lock.writeLock().lock();
1415	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1416	<	lock.writeLock().unlock();
1202	<	t1.start();
1203	<	Thread.sleep(SHORT_DELAY_MS);
1204	<	t2.start();
1205	<	Thread.sleep(SHORT_DELAY_MS);
1206	<	lock.writeLock().lock();
1207	<	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	<	}
1413	>	awaitTermination(t1);
1414	>	awaitTermination(t2);
1415	>
1416	>	assertHasNoWaiters(lock, c);
1417		}
1418
1419		/**

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