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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.56 by jsr166, Tue May 3 06:08:49 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/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 {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
35	–
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 {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 53 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<	public PublicCondition newCondition() {
57	<	return new PublicCondition();
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	<	class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
72	<	PublicCondition() { }
73	<	public Collection<Thread> getWaitingThreads() {
74	<	return super.getWaitingThreads();
75	<	}
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 106 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
109	–
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 133 | Line 182 | public class ReentrantReadWriteLockTest
182		/**
183		* getWriteHoldCount returns number of recursive holds
184		*/
185	<	public void testGetHoldCount() {
186	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	for(int i = 1; i <= SIZE; i++) {
188	<	lock.writeLock().lock();
189	<	assertEquals(i,lock.getWriteHoldCount());
141	<	}
142	<	for(int i = SIZE; i > 0; i--) {
143	<	lock.writeLock().unlock();
144	<	assertEquals(i-1,lock.getWriteHoldCount());
145	<	}
146	<	}
147	<
148	<
149	<	/**
150	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
151	<	*/
152	<	public void testUnlock_IllegalMonitorStateException() {
153	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
154	<	try {
155	<	rl.writeLock().unlock();
156	<	shouldThrow();
157	<	} catch(IllegalMonitorStateException success){}
158	<	}
159	<
160	<
161	<	/**
162	<	* write-lockInterruptibly is interruptible
163	<	*/
164	<	public void testWriteLockInterruptibly_Interrupted() {
165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
166	<	lock.writeLock().lock();
167	<	Thread t = new Thread(new Runnable() {
168	<	public void run() {
169	<	try {
170	<	lock.writeLock().lockInterruptibly();
171	<	threadShouldThrow();
172	<	} catch(InterruptedException success){}
173	<	}
174	<	});
175	<	try {
176	<	t.start();
177	<	t.interrupt();
178	<	lock.writeLock().unlock();
179	<	t.join();
180	<	} catch(Exception e){
181	<	unexpectedException();
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	<	}
184	<
185	<	/**
186	<	* timed write-trylock is interruptible
187	<	*/
188	<	public void testWriteTryLock_Interrupted() {
189	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
190	<	lock.writeLock().lock();
191	<	Thread t = new Thread(new Runnable() {
192	<	public void run() {
193	<	try {
194	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
195	<	threadShouldThrow();
196	<	} catch(InterruptedException success){}
197	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.interrupt();
191	>	for (int i = SIZE; i > 0; i--) {
192		lock.writeLock().unlock();
193	<	t.join();
204	<	} catch(Exception e){
205	<	unexpectedException();
193	>	assertEquals(i-1,lock.getWriteHoldCount());
194		}
195		}
196
197		/**
198	<	* read-lockInterruptibly is interruptible
198	>	* WriteLock.getHoldCount returns number of recursive holds
199		*/
200	<	public void testReadLockInterruptibly_Interrupted() {
201	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	lock.writeLock().lock();
203	<	Thread t = new Thread(new Runnable() {
204	<	public void run() {
205	<	try {
206	<	lock.readLock().lockInterruptibly();
219	<	threadShouldThrow();
220	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
225	<	t.interrupt();
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.writeLock().getHoldCount());
205	>	}
206	>	for (int i = SIZE; i > 0; i--) {
207		lock.writeLock().unlock();
208	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
208	>	assertEquals(i-1,lock.writeLock().getHoldCount());
209		}
210	<	}
210	>	}
211
212		/**
213	<	* timed read-trylock is interruptible
213	>	* getReadHoldCount returns number of recursive holds
214		*/
215	<	public void testReadTryLock_Interrupted() {
216	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	<	lock.writeLock().lock();
218	<	Thread t = new Thread(new Runnable() {
219	<	public void run() {
220	<	try {
221	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
222	<	threadShouldThrow();
223	<	} catch(InterruptedException success){}
245	<	}
246	<	});
247	<	try {
248	<	t.start();
249	<	t.interrupt();
250	<	t.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
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		}
226
256	–
227		/**
228	<	* write-trylock fails if locked
228	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testWriteTryLockWhenLocked() {
231	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
262	<	lock.writeLock().lock();
263	<	Thread t = new Thread(new Runnable() {
264	<	public void run() {
265	<	threadAssertFalse(lock.writeLock().tryLock());
266	<	}
267	<	});
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232		try {
233	<	t.start();
234	<	t.join();
235	<	lock.writeLock().unlock();
236	<	} catch(Exception e){
273	<	unexpectedException();
274	<	}
275	<	}
233	>	rl.writeLock().unlock();
234	>	shouldThrow();
235	>	} catch (IllegalMonitorStateException success) {}
236	>	}
237
238		/**
239	<	* read-trylock fails if locked
239	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
240		*/
241	<	public void testReadTryLockWhenLocked() {
242	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
282	<	lock.writeLock().lock();
283	<	Thread t = new Thread(new Runnable() {
284	<	public void run() {
285	<	threadAssertFalse(lock.readLock().tryLock());
286	<	}
287	<	});
241	>	public void testReadUnlock_IllegalMonitorStateException() {
242	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
243		try {
244	<	t.start();
245	<	t.join();
246	<	lock.writeLock().unlock();
247	<	} catch(Exception e){
293	<	unexpectedException();
294	<	}
295	<	}
244	>	rl.readLock().unlock();
245	>	shouldThrow();
246	>	} catch (IllegalMonitorStateException success) {}
247	>	}
248
249		/**
250	<	* Multiple threads can hold a read lock when not write-locked
250	>	* write-lockInterruptibly is interruptible
251		*/
252	<	public void testMultipleReadLocks() {
253	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	lock.readLock().lock();
255	<	Thread t = new Thread(new Runnable() {
256	<	public void run() {
257	<	threadAssertTrue(lock.readLock().tryLock());
258	<	lock.readLock().unlock();
259	<	}
260	<	});
261	<	try {
262	<	t.start();
263	<	t.join();
264	<	lock.readLock().unlock();
313	<	} catch(Exception e){
314	<	unexpectedException();
315	<	}
316	<	}
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	<	* A writelock succeeds after reading threads unlock
267	>	* timed write-tryLock is interruptible
268		*/
269	<	public void testWriteAfterMultipleReadLocks() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.readLock().lock();
272	<	Thread t1 = new Thread(new Runnable() {
273	<	public void run() {
274	<	lock.readLock().lock();
275	<	lock.readLock().unlock();
328	<	}
329	<	});
330	<	Thread t2 = new Thread(new Runnable() {
331	<	public void run() {
332	<	lock.writeLock().lock();
333	<	lock.writeLock().unlock();
334	<	}
335	<	});
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	<	try {
278	<	t1.start();
279	<	t2.start();
280	<	Thread.sleep(SHORT_DELAY_MS);
281	<	lock.readLock().unlock();
342	<	t1.join(MEDIUM_DELAY_MS);
343	<	t2.join(MEDIUM_DELAY_MS);
344	<	assertTrue(!t1.isAlive());
345	<	assertTrue(!t2.isAlive());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
277	>	waitForQueuedThread(lock, t);
278	>	t.interrupt();
279	>	awaitTermination(t);
280	>	releaseWriteLock(lock);
281	>	}
282
283		/**
284	<	* Readlocks succeed after a writing thread unlocks
284	>	* read-lockInterruptibly is interruptible
285		*/
286	<	public void testReadAfterWriteLock() {
287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.writeLock().lock();
289	<	Thread t1 = new Thread(new Runnable() {
290	<	public void run() {
291	<	lock.readLock().lock();
292	<	lock.readLock().unlock();
362	<	}
363	<	});
364	<	Thread t2 = new Thread(new Runnable() {
365	<	public void run() {
366	<	lock.readLock().lock();
367	<	lock.readLock().unlock();
368	<	}
369	<	});
370	<
371	<	try {
372	<	t1.start();
373	<	t2.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
375	<	lock.writeLock().unlock();
376	<	t1.join(MEDIUM_DELAY_MS);
377	<	t2.join(MEDIUM_DELAY_MS);
378	<	assertTrue(!t1.isAlive());
379	<	assertTrue(!t2.isAlive());
380	<
381	<	} catch(Exception e){
382	<	unexpectedException();
383	<	}
384	<	}
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	<	* Read trylock succeeds if readlocked but not writelocked
301	>	* timed read-tryLock is interruptible
302		*/
303	<	public void testTryLockWhenReadLocked() {
304	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	<	lock.readLock().lock();
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	threadAssertTrue(lock.readLock().tryLock());
309	<	lock.readLock().unlock();
397	<	}
398	<	});
399	<	try {
400	<	t.start();
401	<	t.join();
402	<	lock.readLock().unlock();
403	<	} catch(Exception e){
404	<	unexpectedException();
405	<	}
406	<	}
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	<
311	>	waitForQueuedThread(lock, t);
312	>	t.interrupt();
313	>	awaitTermination(t);
314	>	releaseWriteLock(lock);
315	>	}
316
317		/**
318	<	* write trylock fails when readlocked
318	>	* write-tryLock fails if locked
319		*/
320	<	public void testWriteTryLockWhenReadLocked() {
321	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	<	lock.readLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	threadAssertFalse(lock.writeLock().tryLock());
326	<	}
420	<	});
421	<	try {
422	<	t.start();
423	<	t.join();
424	<	lock.readLock().unlock();
425	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
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	<
328	>	awaitTermination(t);
329	>	releaseWriteLock(lock);
330	>	}
331
332		/**
333	<	* write timed trylock times out if locked
333	>	* read-tryLock fails if locked
334		*/
335	<	public void testWriteTryLock_Timeout() {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	try {
341	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
342	<	} catch (Exception ex) {
343	<	threadUnexpectedException();
344	<	}
345	<	}
446	<	});
447	<	try {
448	<	t.start();
449	<	t.join();
450	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
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	<	* read timed trylock times out if write-locked
348	>	* Multiple threads can hold a read lock when not write-locked
349		*/
350	<	public void testReadTryLock_Timeout() {
351	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	<	lock.writeLock().lock();
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	try {
356	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
357	<	} catch (Exception ex) {
358	<	threadUnexpectedException();
359	<	}
360	<	}
361	<	});
362	<	try {
363	<	t.start();
364	<	t.join();
365	<	lock.writeLock().unlock();
366	<	} catch(Exception e){
367	<	unexpectedException();
368	<	}
369	<	}
370	<
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	>
380	>	awaitTermination(t1);
381	>	waitForQueuedThread(lock, t2);
382	>	assertNotWriteLocked(lock);
383	>	lock.readLock().unlock();
384	>	awaitTermination(t2);
385	>	}
386	>
387	>	/**
388	>	* Readlocks succeed only after a writing thread unlocks
389	>	*/
390	>	public void testReadAfterWriteLock() throws InterruptedException {
391	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
392	>	lock.writeLock().lock();
393	>	Thread t1 = newStartedThread(new CheckedRunnable() {
394	>	public void realRun() {
395	>	lock.readLock().lock();
396	>	lock.readLock().unlock();
397	>	}});
398	>	Thread t2 = newStartedThread(new CheckedRunnable() {
399	>	public void realRun() {
400	>	lock.readLock().lock();
401	>	lock.readLock().unlock();
402	>	}});
403	>
404	>	waitForQueuedThread(lock, t1);
405	>	waitForQueuedThread(lock, t2);
406	>	releaseWriteLock(lock);
407	>	awaitTermination(t1);
408	>	awaitTermination(t2);
409	>	}
410	>
411	>	/**
412	>	* Read trylock succeeds if write locked by current thread
413	>	*/
414	>	public void testReadHoldingWriteLock() {
415	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
416	>	lock.writeLock().lock();
417	>	assertTrue(lock.readLock().tryLock());
418	>	lock.readLock().unlock();
419	>	lock.writeLock().unlock();
420	>	}
421	>
422	>	/**
423	>	* Read lock succeeds if write locked by current thread even if
424	>	* other threads are waiting for readlock
425	>	*/
426	>	public void testReadHoldingWriteLock2() throws InterruptedException {
427	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
428	>	lock.writeLock().lock();
429	>	lock.readLock().lock();
430	>	lock.readLock().unlock();
431	>
432	>	Thread t1 = newStartedThread(new CheckedRunnable() {
433	>	public void realRun() {
434	>	lock.readLock().lock();
435	>	lock.readLock().unlock();
436	>	}});
437	>	Thread t2 = newStartedThread(new CheckedRunnable() {
438	>	public void realRun() {
439	>	lock.readLock().lock();
440	>	lock.readLock().unlock();
441	>	}});
442	>
443	>	waitForQueuedThread(lock, t1);
444	>	waitForQueuedThread(lock, t2);
445	>	assertTrue(lock.isWriteLockedByCurrentThread());
446	>	lock.readLock().lock();
447	>	lock.readLock().unlock();
448	>	releaseWriteLock(lock);
449	>	awaitTermination(t1);
450	>	awaitTermination(t2);
451	>	}
452	>
453	>	/**
454	>	* Read lock succeeds if write locked by current thread even if
455	>	* other threads are waiting for writelock
456	>	*/
457	>	public void testReadHoldingWriteLock3() throws InterruptedException {
458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
459	>	lock.writeLock().lock();
460	>	lock.readLock().lock();
461	>	lock.readLock().unlock();
462	>
463	>	Thread t1 = newStartedThread(new CheckedRunnable() {
464	>	public void realRun() {
465	>	lock.writeLock().lock();
466	>	lock.writeLock().unlock();
467	>	}});
468	>	Thread t2 = newStartedThread(new CheckedRunnable() {
469	>	public void realRun() {
470	>	lock.writeLock().lock();
471	>	lock.writeLock().unlock();
472	>	}});
473	>
474	>	waitForQueuedThread(lock, t1);
475	>	waitForQueuedThread(lock, t2);
476	>	assertTrue(lock.isWriteLockedByCurrentThread());
477	>	lock.readLock().lock();
478	>	lock.readLock().unlock();
479	>	releaseWriteLock(lock);
480	>	awaitTermination(t1);
481	>	awaitTermination(t2);
482	>	}
483	>
484	>	/**
485	>	* Write lock succeeds if write locked by current thread even if
486	>	* other threads are waiting for writelock
487	>	*/
488	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
489	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
490	>	lock.writeLock().lock();
491	>	lock.writeLock().lock();
492	>	lock.writeLock().unlock();
493	>
494	>	Thread t1 = newStartedThread(new CheckedRunnable() {
495	>	public void realRun() {
496	>	lock.writeLock().lock();
497	>	lock.writeLock().unlock();
498	>	}});
499	>	Thread t2 = newStartedThread(new CheckedRunnable() {
500	>	public void realRun() {
501	>	lock.writeLock().lock();
502	>	lock.writeLock().unlock();
503	>	}});
504	>
505	>	waitForQueuedThread(lock, t1);
506	>	waitForQueuedThread(lock, t2);
507	>	assertTrue(lock.isWriteLockedByCurrentThread());
508	>	assertEquals(1, lock.getWriteHoldCount());
509	>	lock.writeLock().lock();
510	>	assertTrue(lock.isWriteLockedByCurrentThread());
511	>	assertEquals(2, lock.getWriteHoldCount());
512	>	lock.writeLock().unlock();
513	>	releaseWriteLock(lock);
514	>	awaitTermination(t1);
515	>	awaitTermination(t2);
516	>	}
517	>
518	>	/**
519	>	* Fair Read trylock succeeds if write locked by current thread
520	>	*/
521	>	public void testReadHoldingWriteLockFair() {
522	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
523	>	lock.writeLock().lock();
524	>	assertTrue(lock.readLock().tryLock());
525	>	lock.readLock().unlock();
526	>	lock.writeLock().unlock();
527	>	}
528	>
529	>	/**
530	>	* Fair Read lock succeeds if write locked by current thread even if
531	>	* other threads are waiting for readlock
532	>	*/
533	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
534	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
535	>	lock.writeLock().lock();
536	>	lock.readLock().lock();
537	>	lock.readLock().unlock();
538	>
539	>	Thread t1 = newStartedThread(new CheckedRunnable() {
540	>	public void realRun() {
541	>	lock.readLock().lock();
542	>	lock.readLock().unlock();
543	>	}});
544	>	Thread t2 = newStartedThread(new CheckedRunnable() {
545	>	public void realRun() {
546	>	lock.readLock().lock();
547	>	lock.readLock().unlock();
548	>	}});
549	>
550	>	waitForQueuedThread(lock, t1);
551	>	waitForQueuedThread(lock, t2);
552	>	assertTrue(lock.isWriteLockedByCurrentThread());
553	>	lock.readLock().lock();
554	>	lock.readLock().unlock();
555	>	releaseWriteLock(lock);
556	>	awaitTermination(t1);
557	>	awaitTermination(t2);
558	>	}
559	>
560	>	/**
561	>	* Fair Read lock succeeds if write locked by current thread even if
562	>	* other threads are waiting for writelock
563	>	*/
564	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
565	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
566	>	lock.writeLock().lock();
567	>	lock.readLock().lock();
568	>	lock.readLock().unlock();
569	>
570	>	Thread t1 = newStartedThread(new CheckedRunnable() {
571	>	public void realRun() {
572	>	lock.writeLock().lock();
573	>	lock.writeLock().unlock();
574	>	}});
575	>	Thread t2 = newStartedThread(new CheckedRunnable() {
576	>	public void realRun() {
577	>	lock.writeLock().lock();
578	>	lock.writeLock().unlock();
579	>	}});
580	>
581	>	waitForQueuedThread(lock, t1);
582	>	waitForQueuedThread(lock, t2);
583	>	assertTrue(lock.isWriteLockedByCurrentThread());
584	>	lock.readLock().lock();
585	>	lock.readLock().unlock();
586	>	releaseWriteLock(lock);
587	>	awaitTermination(t1);
588	>	awaitTermination(t2);
589	>	}
590	>
591	>	/**
592	>	* Fair Write lock succeeds if write locked by current thread even if
593	>	* other threads are waiting for writelock
594	>	*/
595	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
596	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
597	>	lock.writeLock().lock();
598	>	Thread t1 = newStartedThread(new CheckedRunnable() {
599	>	public void realRun() {
600	>	lock.writeLock().lock();
601	>	lock.writeLock().unlock();
602	>	}});
603	>	Thread t2 = newStartedThread(new CheckedRunnable() {
604	>	public void realRun() {
605	>	lock.writeLock().lock();
606	>	lock.writeLock().unlock();
607	>	}});
608	>
609	>	waitForQueuedThread(lock, t1);
610	>	waitForQueuedThread(lock, t2);
611	>	assertTrue(lock.isWriteLockedByCurrentThread());
612	>	assertEquals(1, lock.getWriteHoldCount());
613	>	lock.writeLock().lock();
614	>	assertEquals(2, lock.getWriteHoldCount());
615	>	lock.writeLock().unlock();
616	>	lock.writeLock().lock();
617	>	lock.writeLock().unlock();
618	>	releaseWriteLock(lock);
619	>	awaitTermination(t1);
620	>	awaitTermination(t2);
621	>	}
622	>
623	>	/**
624	>	* Read tryLock succeeds if readlocked but not writelocked
625	>	*/
626	>	public void testTryLockWhenReadLocked() throws InterruptedException {
627	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
628	>	lock.readLock().lock();
629	>	Thread t = newStartedThread(new CheckedRunnable() {
630	>	public void realRun() {
631	>	assertTrue(lock.readLock().tryLock());
632	>	lock.readLock().unlock();
633	>	}});
634	>
635	>	awaitTermination(t);
636	>	lock.readLock().unlock();
637	>	}
638	>
639	>	/**
640	>	* write tryLock fails when readlocked
641	>	*/
642	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	>	lock.readLock().lock();
645	>	Thread t = newStartedThread(new CheckedRunnable() {
646	>	public void realRun() {
647	>	assertFalse(lock.writeLock().tryLock());
648	>	}});
649	>
650	>	awaitTermination(t);
651	>	lock.readLock().unlock();
652	>	}
653	>
654	>	/**
655	>	* Fair Read tryLock succeeds if readlocked but not writelocked
656	>	*/
657	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
659	>	lock.readLock().lock();
660	>	Thread t = newStartedThread(new CheckedRunnable() {
661	>	public void realRun() {
662	>	assertTrue(lock.readLock().tryLock());
663	>	lock.readLock().unlock();
664	>	}});
665	>
666	>	awaitTermination(t);
667	>	lock.readLock().unlock();
668	>	}
669	>
670	>	/**
671	>	* Fair write tryLock fails when readlocked
672	>	*/
673	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
674	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
675	>	lock.readLock().lock();
676	>	Thread t = newStartedThread(new CheckedRunnable() {
677	>	public void realRun() {
678	>	assertFalse(lock.writeLock().tryLock());
679	>	}});
680	>
681	>	awaitTermination(t);
682	>	lock.readLock().unlock();
683	>	}
684	>
685	>	/**
686	>	* write timed tryLock times out if locked
687	>	*/
688	>	public void testWriteTryLock_Timeout() throws InterruptedException {
689	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	>	lock.writeLock().lock();
691	>	Thread t = newStartedThread(new CheckedRunnable() {
692	>	public void realRun() throws InterruptedException {
693	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
694	>	}});
695	>
696	>	awaitTermination(t);
697	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
698	>	lock.writeLock().unlock();
699	>	}
700	>
701	>	/**
702	>	* read timed tryLock times out if write-locked
703	>	*/
704	>	public void testReadTryLock_Timeout() throws InterruptedException {
705	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
706	>	lock.writeLock().lock();
707	>	Thread t = newStartedThread(new CheckedRunnable() {
708	>	public void realRun() throws InterruptedException {
709	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
710	>	}});
711	>
712	>	awaitTermination(t);
713	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
714	>	lock.writeLock().unlock();
715	>	}
716
717		/**
718		* write lockInterruptibly succeeds if lock free else is interruptible
719		*/
720	<	public void testWriteLockInterruptibly() {
721	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	<	try {
723	<	lock.writeLock().lockInterruptibly();
724	<	} catch(Exception e) {
725	<	unexpectedException();
726	<	}
727	<	Thread t = new Thread(new Runnable() {
728	<	public void run() {
729	<	try {
730	<	lock.writeLock().lockInterruptibly();
731	<	threadShouldThrow();
496	<	}
497	<	catch(InterruptedException success) {
498	<	}
499	<	}
500	<	});
501	<	try {
502	<	t.start();
503	<	t.interrupt();
504	<	t.join();
505	<	lock.writeLock().unlock();
506	<	} catch(Exception e){
507	<	unexpectedException();
508	<	}
720	>	public void testWriteLockInterruptibly() throws InterruptedException {
721	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	>	lock.writeLock().lockInterruptibly();
723	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
724	>	public void realRun() throws InterruptedException {
725	>	lock.writeLock().lockInterruptibly();
726	>	}});
727	>
728	>	waitForQueuedThread(lock, t);
729	>	t.interrupt();
730	>	awaitTermination(t);
731	>	releaseWriteLock(lock);
732		}
733
734		/**
735	<	*  read lockInterruptibly succeeds if lock free else is interruptible
735	>	* read lockInterruptibly succeeds if lock free else is interruptible
736		*/
737	<	public void testReadLockInterruptibly() {
738	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739	<	try {
740	<	lock.writeLock().lockInterruptibly();
741	<	} catch(Exception e) {
742	<	unexpectedException();
743	<	}
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	try {
747	<	lock.readLock().lockInterruptibly();
748	<	threadShouldThrow();
526	<	}
527	<	catch(InterruptedException success) {
528	<	}
529	<	}
530	<	});
531	<	try {
532	<	t.start();
533	<	t.interrupt();
534	<	t.join();
535	<	lock.writeLock().unlock();
536	<	} catch(Exception e){
537	<	unexpectedException();
538	<	}
737	>	public void testReadLockInterruptibly() throws InterruptedException {
738	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739	>	lock.writeLock().lockInterruptibly();
740	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.readLock().lockInterruptibly();
743	>	}});
744	>
745	>	waitForQueuedThread(lock, t);
746	>	t.interrupt();
747	>	awaitTermination(t);
748	>	releaseWriteLock(lock);
749		}
750
751		/**
752		* Calling await without holding lock throws IllegalMonitorStateException
753		*/
754	<	public void testAwait_IllegalMonitor() {
755	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	public void testAwait_IllegalMonitor() throws InterruptedException {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
756		final Condition c = lock.writeLock().newCondition();
757		try {
758		c.await();
759		shouldThrow();
760	<	}
761	<	catch (IllegalMonitorStateException success) {
762	<	}
553	<	catch (Exception ex) {
760	>	} catch (IllegalMonitorStateException success) {}
761	>	try {
762	>	c.await(LONG_DELAY_MS, MILLISECONDS);
763		shouldThrow();
764	<	}
764	>	} catch (IllegalMonitorStateException success) {}
765	>	try {
766	>	c.awaitNanos(100);
767	>	shouldThrow();
768	>	} catch (IllegalMonitorStateException success) {}
769	>	try {
770	>	c.awaitUninterruptibly();
771	>	shouldThrow();
772	>	} catch (IllegalMonitorStateException success) {}
773		}
774
775		/**
776		* Calling signal without holding lock throws IllegalMonitorStateException
777		*/
778		public void testSignal_IllegalMonitor() {
779	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
779	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
780		final Condition c = lock.writeLock().newCondition();
781		try {
782		c.signal();
783		shouldThrow();
784	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
784	>	} catch (IllegalMonitorStateException success) {}
785		}
786
787		/**
788	<	* awaitNanos without a signal times out
788	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
789		*/
790	<	public void testAwaitNanos_Timeout() {
791	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	>	public void testSignalAll_IllegalMonitor() {
791	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
792		final Condition c = lock.writeLock().newCondition();
793		try {
794	<	lock.writeLock().lock();
795	<	long t = c.awaitNanos(100);
796	<	assertTrue(t <= 0);
585	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
794	>	c.signalAll();
795	>	shouldThrow();
796	>	} catch (IllegalMonitorStateException success) {}
797		}
798
799	+	/**
800	+	* awaitNanos without a signal times out
801	+	*/
802	+	public void testAwaitNanos_Timeout() throws InterruptedException {
803	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
804	+	final Condition c = lock.writeLock().newCondition();
805	+	lock.writeLock().lock();
806	+	long startTime = System.nanoTime();
807	+	long timeoutMillis = 10;
808	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
809	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
810	+	assertTrue(nanosRemaining <= 0);
811	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
812	+	lock.writeLock().unlock();
813	+	}
814
815		/**
816	<	*  timed await without a signal times out
816	>	* timed await without a signal times out
817		*/
818	<	public void testAwait_Timeout() {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	>	public void testAwait_Timeout() throws InterruptedException {
819	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820		final Condition c = lock.writeLock().newCondition();
821	<	try {
822	<	lock.writeLock().lock();
823	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
824	<	lock.writeLock().unlock();
825	<	}
826	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
821	>	lock.writeLock().lock();
822	>	long startTime = System.nanoTime();
823	>	long timeoutMillis = 10;
824	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
825	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
826	>	lock.writeLock().unlock();
827		}
828
829		/**
830		* awaitUntil without a signal times out
831		*/
832	<	public void testAwaitUntil_Timeout() {
833	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
832	>	public void testAwaitUntil_Timeout() throws InterruptedException {
833	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
834		final Condition c = lock.writeLock().newCondition();
835	<	try {
836	<	lock.writeLock().lock();
837	<	java.util.Date d = new java.util.Date();
838	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
835	>	lock.writeLock().lock();
836	>	java.util.Date d = new java.util.Date();
837	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
838	>	lock.writeLock().unlock();
839		}
840
841		/**
842		* await returns when signalled
843		*/
844	<	public void testAwait() {
845	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	>	public void testAwait() throws InterruptedException {
845	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846		final Condition c = lock.writeLock().newCondition();
847	<	Thread t = new Thread(new Runnable() {
848	<	public void run() {
849	<	try {
850	<	lock.writeLock().lock();
851	<	c.await();
852	<	lock.writeLock().unlock();
853	<	}
854	<	catch(InterruptedException e) {
855	<	threadUnexpectedException();
856	<	}
857	<	}
858	<	});
859	<
860	<	try {
861	<	t.start();
647	<	Thread.sleep(SHORT_DELAY_MS);
648	<	lock.writeLock().lock();
649	<	c.signal();
650	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
656	<	}
847	>	final CountDownLatch locked = new CountDownLatch(1);
848	>	Thread t = newStartedThread(new CheckedRunnable() {
849	>	public void realRun() throws InterruptedException {
850	>	lock.writeLock().lock();
851	>	locked.countDown();
852	>	c.await();
853	>	lock.writeLock().unlock();
854	>	}});
855	>
856	>	locked.await();
857	>	lock.writeLock().lock();
858	>	c.signal();
859	>	assertTrue(t.isAlive());
860	>	lock.writeLock().unlock();
861	>	awaitTermination(t);
862		}
863
864		/**
865		* awaitUninterruptibly doesn't abort on interrupt
866		*/
867	<	public void testAwaitUninterruptibly() {
868	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
867	>	public void testAwaitUninterruptibly() throws InterruptedException {
868	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869		final Condition c = lock.writeLock().newCondition();
870	<	Thread t = new Thread(new Runnable() {
871	<	public void run() {
872	<	lock.writeLock().lock();
873	<	c.awaitUninterruptibly();
874	<	lock.writeLock().unlock();
875	<	}
876	<	});
877	<
878	<	try {
879	<	t.start();
880	<	Thread.sleep(SHORT_DELAY_MS);
881	<	t.interrupt();
882	<	lock.writeLock().lock();
883	<	c.signal();
884	<	lock.writeLock().unlock();
885	<	assert(t.isInterrupted());
886	<	t.join(SHORT_DELAY_MS);
887	<	assertFalse(t.isAlive());
888	<	}
889	<	catch (Exception ex) {
890	<	unexpectedException();
686	<	}
870	>	final CountDownLatch locked = new CountDownLatch(1);
871	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
872	>	Thread t = newStartedThread(new CheckedRunnable() {
873	>	public void realRun() {
874	>	lock.writeLock().lock();
875	>	locked.countDown();
876	>	c.awaitUninterruptibly();
877	>	assertTrue(Thread.interrupted());
878	>	lock.writeLock().unlock();
879	>	}});
880	>
881	>	locked.await();
882	>	lock.writeLock().lock();
883	>	lock.writeLock().unlock();
884	>	t.interrupt();
885	>	t.join(10);
886	>	assertTrue(t.isAlive());
887	>	lock.writeLock().lock();
888	>	c.signal();
889	>	lock.writeLock().unlock();
890	>	awaitTermination(t);
891		}
892
893		/**
894		* await is interruptible
895		*/
896	<	public void testAwait_Interrupt() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	public void testAwait_Interrupt() throws InterruptedException {
897	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
898		final Condition c = lock.writeLock().newCondition();
899	<	Thread t = new Thread(new Runnable() {
900	<	public void run() {
901	<	try {
902	<	lock.writeLock().lock();
903	<	c.await();
904	<	lock.writeLock().unlock();
905	<	threadShouldThrow();
906	<	}
907	<	catch(InterruptedException success) {
908	<	}
909	<	}
910	<	});
911	<
912	<	try {
913	<	t.start();
914	<	Thread.sleep(SHORT_DELAY_MS);
915	<	t.interrupt();
916	<	t.join(SHORT_DELAY_MS);
917	<	assertFalse(t.isAlive());
918	<	}
919	<	catch (Exception ex) {
920	<	unexpectedException();
921	<	}
899	>	final CountDownLatch locked = new CountDownLatch(1);
900	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
901	>	public void realRun() throws InterruptedException {
902	>	lock.writeLock().lock();
903	>	assertTrue(lock.isWriteLocked());
904	>	assertTrue(lock.isWriteLockedByCurrentThread());
905	>	assertHasNoWaiters(lock, c);
906	>	locked.countDown();
907	>	try {
908	>	c.await();
909	>	} finally {
910	>	assertTrue(lock.isWriteLocked());
911	>	assertTrue(lock.isWriteLockedByCurrentThread());
912	>	assertHasNoWaiters(lock, c);
913	>	lock.writeLock().unlock();
914	>	assertFalse(Thread.interrupted());
915	>	}
916	>	}});
917	>
918	>	locked.await();
919	>	assertHasWaiters(lock, c, t);
920	>	t.interrupt();
921	>	awaitTermination(t);
922	>	assertFalse(lock.isWriteLocked());
923		}
924
925		/**
926		* awaitNanos is interruptible
927		*/
928	<	public void testAwaitNanos_Interrupt() {
929	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
929	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new Runnable() {
932	<	public void run() {
933	<	try {
934	<	lock.writeLock().lock();
935	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
936	<	lock.writeLock().unlock();
937	<	threadShouldThrow();
938	<	}
939	<	catch(InterruptedException success) {
940	<	}
941	<	}
942	<	});
943	<
944	<	try {
945	<	t.start();
946	<	Thread.sleep(SHORT_DELAY_MS);
947	<	t.interrupt();
948	<	t.join(SHORT_DELAY_MS);
949	<	assertFalse(t.isAlive());
950	<	}
951	<	catch (Exception ex) {
952	<	unexpectedException();
953	<	}
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	lock.writeLock().lock();
935	>	assertTrue(lock.isWriteLocked());
936	>	assertTrue(lock.isWriteLockedByCurrentThread());
937	>	assertHasNoWaiters(lock, c);
938	>	locked.countDown();
939	>	try {
940	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
941	>	} finally {
942	>	assertTrue(lock.isWriteLocked());
943	>	assertTrue(lock.isWriteLockedByCurrentThread());
944	>	assertHasNoWaiters(lock, c);
945	>	lock.writeLock().unlock();
946	>	assertFalse(Thread.interrupted());
947	>	}
948	>	}});
949	>
950	>	locked.await();
951	>	assertHasWaiters(lock, c, t);
952	>	t.interrupt();
953	>	awaitTermination(t);
954	>	assertFalse(lock.isWriteLocked());
955		}
956
957		/**
958		* awaitUntil is interruptible
959		*/
960	<	public void testAwaitUntil_Interrupt() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
961	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
962		final Condition c = lock.writeLock().newCondition();
963	<	Thread t = new Thread(new Runnable() {
964	<	public void run() {
965	<	try {
966	<	lock.writeLock().lock();
967	<	java.util.Date d = new java.util.Date();
968	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
969	<	lock.writeLock().unlock();
970	<	threadShouldThrow();
971	<	}
972	<	catch(InterruptedException success) {
973	<	}
974	<	}
975	<	});
976	<
977	<	try {
978	<	t.start();
979	<	Thread.sleep(SHORT_DELAY_MS);
980	<	t.interrupt();
981	<	t.join(SHORT_DELAY_MS);
982	<	assertFalse(t.isAlive());
983	<	}
984	<	catch (Exception ex) {
985	<	unexpectedException();
986	<	}
963	>	final CountDownLatch locked = new CountDownLatch(1);
964	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
965	>	public void realRun() throws InterruptedException {
966	>	lock.writeLock().lock();
967	>	assertTrue(lock.isWriteLocked());
968	>	assertTrue(lock.isWriteLockedByCurrentThread());
969	>	assertHasNoWaiters(lock, c);
970	>	locked.countDown();
971	>	java.util.Date d = new java.util.Date();
972	>	try {
973	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
974	>	} finally {
975	>	assertTrue(lock.isWriteLocked());
976	>	assertTrue(lock.isWriteLockedByCurrentThread());
977	>	assertHasNoWaiters(lock, c);
978	>	lock.writeLock().unlock();
979	>	assertFalse(Thread.interrupted());
980	>	}
981	>	}});
982	>
983	>	locked.await();
984	>	assertHasWaiters(lock, c, t);
985	>	t.interrupt();
986	>	awaitTermination(t);
987	>	assertFalse(lock.isWriteLocked());
988		}
989
990		/**
991		* signalAll wakes up all threads
992		*/
993	<	public void testSignalAll() {
994	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
993	>	public void testSignalAll() throws InterruptedException {
994	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
995		final Condition c = lock.writeLock().newCondition();
996	<	Thread t1 = new Thread(new Runnable() {
997	<	public void run() {
998	<	try {
999	<	lock.writeLock().lock();
1000	<	c.await();
1001	<	lock.writeLock().unlock();
1002	<	}
1003	<	catch(InterruptedException e) {
1004	<	threadUnexpectedException();
1005	<	}
1006	<	}
1007	<	});
1008	<
1009	<	Thread t2 = new Thread(new Runnable() {
1010	<	public void run() {
1011	<	try {
1012	<	lock.writeLock().lock();
1013	<	c.await();
1014	<	lock.writeLock().unlock();
1015	<	}
1016	<	catch(InterruptedException e) {
1017	<	threadUnexpectedException();
1018	<	}
1019	<	}
1020	<	});
996	>	final CountDownLatch locked = new CountDownLatch(2);
997	>	final Lock writeLock = lock.writeLock();
998	>	Thread t1 = newStartedThread(new CheckedRunnable() {
999	>	public void realRun() throws InterruptedException {
1000	>	writeLock.lock();
1001	>	locked.countDown();
1002	>	c.await();
1003	>	writeLock.unlock();
1004	>	}});
1005	>
1006	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1007	>	public void realRun() throws InterruptedException {
1008	>	writeLock.lock();
1009	>	locked.countDown();
1010	>	c.await();
1011	>	writeLock.unlock();
1012	>	}});
1013	>
1014	>	locked.await();
1015	>	writeLock.lock();
1016	>	assertHasWaiters(lock, c, t1, t2);
1017	>	c.signalAll();
1018	>	assertHasNoWaiters(lock, c);
1019	>	writeLock.unlock();
1020	>	awaitTermination(t1);
1021	>	awaitTermination(t2);
1022	>	}
1023
1024	<	try {
1025	<	t1.start();
1026	<	t2.start();
1027	<	Thread.sleep(SHORT_DELAY_MS);
1028	<	lock.writeLock().lock();
1029	<	c.signalAll();
1030	<	lock.writeLock().unlock();
1031	<	t1.join(SHORT_DELAY_MS);
1032	<	t2.join(SHORT_DELAY_MS);
1033	<	assertFalse(t1.isAlive());
1034	<	assertFalse(t2.isAlive());
1035	<	}
1036	<	catch (Exception ex) {
1037	<	unexpectedException();
1038	<	}
1024	>	/**
1025	>	* signal wakes up waiting threads in FIFO order.
1026	>	*/
1027	>	public void testSignalWakesFifo() throws InterruptedException {
1028	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1029	>	final Condition c = lock.writeLock().newCondition();
1030	>	final CountDownLatch locked1 = new CountDownLatch(1);
1031	>	final CountDownLatch locked2 = new CountDownLatch(1);
1032	>	final Lock writeLock = lock.writeLock();
1033	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1034	>	public void realRun() throws InterruptedException {
1035	>	writeLock.lock();
1036	>	locked1.countDown();
1037	>	c.await();
1038	>	writeLock.unlock();
1039	>	}});
1040	>
1041	>	locked1.await();
1042	>
1043	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1044	>	public void realRun() throws InterruptedException {
1045	>	writeLock.lock();
1046	>	locked2.countDown();
1047	>	c.await();
1048	>	writeLock.unlock();
1049	>	}});
1050	>
1051	>	locked2.await();
1052	>
1053	>	writeLock.lock();
1054	>	assertHasWaiters(lock, c, t1, t2);
1055	>	assertFalse(lock.hasQueuedThreads());
1056	>	c.signal();
1057	>	assertHasWaiters(lock, c, t2);
1058	>	assertTrue(lock.hasQueuedThread(t1));
1059	>	assertFalse(lock.hasQueuedThread(t2));
1060	>	c.signal();
1061	>	assertHasNoWaiters(lock, c);
1062	>	assertTrue(lock.hasQueuedThread(t1));
1063	>	assertTrue(lock.hasQueuedThread(t2));
1064	>	writeLock.unlock();
1065	>	awaitTermination(t1);
1066	>	awaitTermination(t2);
1067		}
1068
1069		/**
1070		* A serialized lock deserializes as unlocked
1071		*/
1072	<	public void testSerialization() {
1072	>	public void testSerialization() throws Exception {
1073		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1074		l.readLock().lock();
1075		l.readLock().unlock();
1076
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();
1086	+	r.readLock().unlock();
1087	+	}
1088	+
1089	+	/**
1090	+	* hasQueuedThreads reports whether there are waiting threads
1091	+	*/
1092	+	public void testhasQueuedThreads() throws InterruptedException {
1093	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1094	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1095	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1096	+	assertFalse(lock.hasQueuedThreads());
1097	+	lock.writeLock().lock();
1098	+	assertFalse(lock.hasQueuedThreads());
1099	+	long startTime = System.nanoTime();
1100	+	t1.start();
1101	+	waitForQueuedThread(lock, t1);
1102	+	t2.start();
1103	+	waitForQueuedThread(lock, t2);
1104	+	assertTrue(lock.hasQueuedThreads());
1105	+	t1.interrupt();
1106	+	awaitTermination(t1);
1107	+	assertTrue(lock.hasQueuedThreads());
1108	+	lock.writeLock().unlock();
1109	+	awaitTermination(t2);
1110	+	assertFalse(lock.hasQueuedThreads());
1111	+	}
1112	+
1113	+	/**
1114	+	* hasQueuedThread(null) throws NPE
1115	+	*/
1116	+	public void testHasQueuedThreadNPE() {
1117	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1118		try {
1119	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1120	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1121	<	out.writeObject(l);
1122	<	out.close();
1123	<
1124	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1125	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1126	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1127	<	r.readLock().lock();
1128	<	r.readLock().unlock();
1129	<	} catch(Exception e){
1130	<	e.printStackTrace();
1131	<	unexpectedException();
1132	<	}
1119	>	sync.hasQueuedThread(null);
1120	>	shouldThrow();
1121	>	} catch (NullPointerException success) {}
1122	>	}
1123	>
1124	>	/**
1125	>	* hasQueuedThread reports whether a thread is queued.
1126	>	*/
1127	>	public void testHasQueuedThread() throws InterruptedException {
1128	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1129	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1130	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1131	>	assertFalse(lock.hasQueuedThread(t1));
1132	>	assertFalse(lock.hasQueuedThread(t2));
1133	>	lock.writeLock().lock();
1134	>	long startTime = System.nanoTime();
1135	>	t1.start();
1136	>	waitForQueuedThread(lock, t1);
1137	>	assertTrue(lock.hasQueuedThread(t1));
1138	>	assertFalse(lock.hasQueuedThread(t2));
1139	>	t2.start();
1140	>	waitForQueuedThread(lock, t2);
1141	>	assertTrue(lock.hasQueuedThread(t1));
1142	>	assertTrue(lock.hasQueuedThread(t2));
1143	>	t1.interrupt();
1144	>	awaitTermination(t1);
1145	>	assertFalse(lock.hasQueuedThread(t1));
1146	>	assertTrue(lock.hasQueuedThread(t2));
1147	>	lock.writeLock().unlock();
1148	>	awaitTermination(t2);
1149	>	assertFalse(lock.hasQueuedThread(t1));
1150	>	assertFalse(lock.hasQueuedThread(t2));
1151		}
1152
1153		/**
1154		* getQueueLength reports number of waiting threads
1155		*/
1156	<	public void testGetQueueLength() {
1157	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1156	>	public void testGetQueueLength() throws InterruptedException {
1157	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1158		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1159		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1160	<	try {
1161	<	assertEquals(0, lock.getQueueLength());
1162	<	lock.writeLock().lock();
1163	<	t1.start();
1164	<	Thread.sleep(SHORT_DELAY_MS);
1165	<	assertEquals(1, lock.getQueueLength());
1166	<	t2.start();
1167	<	Thread.sleep(SHORT_DELAY_MS);
1168	<	assertEquals(2, lock.getQueueLength());
1169	<	t1.interrupt();
1170	<	Thread.sleep(SHORT_DELAY_MS);
1171	<	assertEquals(1, lock.getQueueLength());
1172	<	lock.writeLock().unlock();
1173	<	Thread.sleep(SHORT_DELAY_MS);
1174	<	assertEquals(0, lock.getQueueLength());
1175	<	t1.join();
880	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1160	>	assertEquals(0, lock.getQueueLength());
1161	>	lock.writeLock().lock();
1162	>	long startTime = System.nanoTime();
1163	>	t1.start();
1164	>	waitForQueuedThread(lock, t1);
1165	>	assertEquals(1, lock.getQueueLength());
1166	>	t2.start();
1167	>	waitForQueuedThread(lock, t2);
1168	>	assertEquals(2, lock.getQueueLength());
1169	>	t1.interrupt();
1170	>	awaitTermination(t1);
1171	>	assertEquals(1, lock.getQueueLength());
1172	>	lock.writeLock().unlock();
1173	>	awaitTermination(t2);
1174	>	assertEquals(0, lock.getQueueLength());
1175	>	}
1176
1177		/**
1178		* getQueuedThreads includes waiting threads
1179		*/
1180	<	public void testGetQueuedThreads() {
1181	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1180	>	public void testGetQueuedThreads() throws InterruptedException {
1181	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1182		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1183		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1184	+	assertTrue(lock.getQueuedThreads().isEmpty());
1185	+	lock.writeLock().lock();
1186	+	long startTime = System.nanoTime();
1187	+	assertTrue(lock.getQueuedThreads().isEmpty());
1188	+	t1.start();
1189	+	waitForQueuedThread(lock, t1);
1190	+	assertEquals(1, lock.getQueuedThreads().size());
1191	+	assertTrue(lock.getQueuedThreads().contains(t1));
1192	+	t2.start();
1193	+	waitForQueuedThread(lock, t2);
1194	+	assertEquals(2, lock.getQueuedThreads().size());
1195	+	assertTrue(lock.getQueuedThreads().contains(t1));
1196	+	assertTrue(lock.getQueuedThreads().contains(t2));
1197	+	t1.interrupt();
1198	+	awaitTermination(t1);
1199	+	assertFalse(lock.getQueuedThreads().contains(t1));
1200	+	assertTrue(lock.getQueuedThreads().contains(t2));
1201	+	assertEquals(1, lock.getQueuedThreads().size());
1202	+	lock.writeLock().unlock();
1203	+	awaitTermination(t2);
1204	+	assertTrue(lock.getQueuedThreads().isEmpty());
1205	+	}
1206	+
1207	+	/**
1208	+	* hasWaiters throws NPE if null
1209	+	*/
1210	+	public void testHasWaitersNPE() {
1211	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1212		try {
1213	<	assertTrue(lock.getQueuedThreads().isEmpty());
1214	<	lock.writeLock().lock();
1215	<	assertTrue(lock.getQueuedThreads().isEmpty());
1216	<	t1.start();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().contains(t1));
900	<	t2.start();
901	<	Thread.sleep(SHORT_DELAY_MS);
902	<	assertTrue(lock.getQueuedThreads().contains(t1));
903	<	assertTrue(lock.getQueuedThreads().contains(t2));
904	<	t1.interrupt();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	assertFalse(lock.getQueuedThreads().contains(t1));
907	<	assertTrue(lock.getQueuedThreads().contains(t2));
908	<	lock.writeLock().unlock();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	assertTrue(lock.getQueuedThreads().isEmpty());
911	<	t1.join();
912	<	t2.join();
913	<	} catch(Exception e){
914	<	unexpectedException();
915	<	}
916	<	}
1213	>	lock.hasWaiters(null);
1214	>	shouldThrow();
1215	>	} catch (NullPointerException success) {}
1216	>	}
1217
1218		/**
1219	<	* hasWaiters returns true when a thread is waiting, else false
1219	>	* getWaitQueueLength throws NPE if null
1220		*/
1221	<	public void testHasWaiters() {
1222	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1224	<	Thread t = new Thread(new Runnable() {
1225	<	public void run() {
1226	<	try {
1227	<	lock.writeLock().lock();
928	<	threadAssertFalse(c.hasWaiters());
929	<	threadAssertEquals(0, c.getWaitQueueLength());
930	<	c.await();
931	<	lock.writeLock().unlock();
932	<	}
933	<	catch(InterruptedException e) {
934	<	threadUnexpectedException();
935	<	}
936	<	}
937	<	});
1221	>	public void testGetWaitQueueLengthNPE() {
1222	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223	>	try {
1224	>	lock.getWaitQueueLength(null);
1225	>	shouldThrow();
1226	>	} catch (NullPointerException success) {}
1227	>	}
1228
1229	+	/**
1230	+	* getWaitingThreads throws NPE if null
1231	+	*/
1232	+	public void testGetWaitingThreadsNPE() {
1233	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1234		try {
1235	<	t.start();
1236	<	Thread.sleep(SHORT_DELAY_MS);
1237	<	lock.writeLock().lock();
943	<	assertTrue(c.hasWaiters());
944	<	assertEquals(1, c.getWaitQueueLength());
945	<	c.signal();
946	<	lock.writeLock().unlock();
947	<	Thread.sleep(SHORT_DELAY_MS);
948	<	lock.writeLock().lock();
949	<	assertFalse(c.hasWaiters());
950	<	assertEquals(0, c.getWaitQueueLength());
951	<	lock.writeLock().unlock();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
954	<	}
955	<	catch (Exception ex) {
956	<	unexpectedException();
957	<	}
1235	>	lock.getWaitingThreads(null);
1236	>	shouldThrow();
1237	>	} catch (NullPointerException success) {}
1238		}
1239
1240		/**
1241	<	* getWaitQueueLength returns number of waiting threads
1241	>	* hasWaiters throws IAE if not owned
1242		*/
1243	<	public void testGetWaitQueueLength() {
1244	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1245	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1246	<	Thread t1 = new Thread(new Runnable() {
1247	<	public void run() {
1248	<	try {
1249	<	lock.writeLock().lock();
1250	<	threadAssertFalse(c.hasWaiters());
1251	<	threadAssertEquals(0, c.getWaitQueueLength());
972	<	c.await();
973	<	lock.writeLock().unlock();
974	<	}
975	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
980	<
981	<	Thread t2 = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.writeLock().lock();
985	<	threadAssertTrue(c.hasWaiters());
986	<	threadAssertEquals(1, c.getWaitQueueLength());
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	}
990	<	catch(InterruptedException e) {
991	<	threadUnexpectedException();
992	<	}
993	<	}
994	<	});
1243	>	public void testHasWaitersIAE() {
1244	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1245	>	final Condition c = lock.writeLock().newCondition();
1246	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1247	>	try {
1248	>	lock2.hasWaiters(c);
1249	>	shouldThrow();
1250	>	} catch (IllegalArgumentException success) {}
1251	>	}
1252
1253	+	/**
1254	+	* hasWaiters throws IMSE if not locked
1255	+	*/
1256	+	public void testHasWaitersIMSE() {
1257	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1258	+	final Condition c = lock.writeLock().newCondition();
1259		try {
1260	<	t1.start();
1261	<	Thread.sleep(SHORT_DELAY_MS);
1262	<	t2.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	lock.writeLock().lock();
1002	<	assertTrue(c.hasWaiters());
1003	<	assertEquals(2, c.getWaitQueueLength());
1004	<	c.signalAll();
1005	<	lock.writeLock().unlock();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	lock.writeLock().lock();
1008	<	assertFalse(c.hasWaiters());
1009	<	assertEquals(0, c.getWaitQueueLength());
1010	<	lock.writeLock().unlock();
1011	<	t1.join(SHORT_DELAY_MS);
1012	<	t2.join(SHORT_DELAY_MS);
1013	<	assertFalse(t1.isAlive());
1014	<	assertFalse(t2.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	unexpectedException();
1018	<	}
1260	>	lock.hasWaiters(c);
1261	>	shouldThrow();
1262	>	} catch (IllegalMonitorStateException success) {}
1263		}
1264
1265		/**
1266	<	* getWaitingThreads returns only and all waiting threads
1266	>	* getWaitQueueLength throws IAE if not owned
1267		*/
1268	<	public void testGetWaitingThreads() {
1269	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1270	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1271	<	Thread t1 = new Thread(new Runnable() {
1272	<	public void run() {
1273	<	try {
1274	<	lock.writeLock().lock();
1275	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1276	<	c.await();
1033	<	lock.writeLock().unlock();
1034	<	}
1035	<	catch(InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1040	<
1041	<	Thread t2 = new Thread(new Runnable() {
1042	<	public void run() {
1043	<	try {
1044	<	lock.writeLock().lock();
1045	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
1046	<	c.await();
1047	<	lock.writeLock().unlock();
1048	<	}
1049	<	catch(InterruptedException e) {
1050	<	threadUnexpectedException();
1051	<	}
1052	<	}
1053	<	});
1268	>	public void testGetWaitQueueLengthIAE() {
1269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1270	>	final Condition c = lock.writeLock().newCondition();
1271	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1272	>	try {
1273	>	lock2.getWaitQueueLength(c);
1274	>	shouldThrow();
1275	>	} catch (IllegalArgumentException success) {}
1276	>	}
1277
1278	+	/**
1279	+	* getWaitQueueLength throws IMSE if not locked
1280	+	*/
1281	+	public void testGetWaitQueueLengthIMSE() {
1282	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1283	+	final Condition c = lock.writeLock().newCondition();
1284		try {
1285	<	lock.writeLock().lock();
1286	<	assertTrue(c.getWaitingThreads().isEmpty());
1287	<	lock.writeLock().unlock();
1288	<	t1.start();
1289	<	Thread.sleep(SHORT_DELAY_MS);
1290	<	t2.start();
1291	<	Thread.sleep(SHORT_DELAY_MS);
1292	<	lock.writeLock().lock();
1293	<	assertTrue(c.hasWaiters());
1294	<	assertTrue(c.getWaitingThreads().contains(t1));
1295	<	assertTrue(c.getWaitingThreads().contains(t2));
1296	<	c.signalAll();
1297	<	lock.writeLock().unlock();
1298	<	Thread.sleep(SHORT_DELAY_MS);
1299	<	lock.writeLock().lock();
1300	<	assertFalse(c.hasWaiters());
1301	<	assertTrue(c.getWaitingThreads().isEmpty());
1302	<	lock.writeLock().unlock();
1303	<	t1.join(SHORT_DELAY_MS);
1304	<	t2.join(SHORT_DELAY_MS);
1305	<	assertFalse(t1.isAlive());
1306	<	assertFalse(t2.isAlive());
1307	<	}
1308	<	catch (Exception ex) {
1309	<	unexpectedException();
1310	<	}
1285	>	lock.getWaitQueueLength(c);
1286	>	shouldThrow();
1287	>	} catch (IllegalMonitorStateException success) {}
1288	>	}
1289	>
1290	>	/**
1291	>	* getWaitingThreads throws IAE if not owned
1292	>	*/
1293	>	public void testGetWaitingThreadsIAE() {
1294	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1295	>	final Condition c = lock.writeLock().newCondition();
1296	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1297	>	try {
1298	>	lock2.getWaitingThreads(c);
1299	>	shouldThrow();
1300	>	} catch (IllegalArgumentException success) {}
1301	>	}
1302	>
1303	>	/**
1304	>	* getWaitingThreads throws IMSE if not locked
1305	>	*/
1306	>	public void testGetWaitingThreadsIMSE() {
1307	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1308	>	final Condition c = lock.writeLock().newCondition();
1309	>	try {
1310	>	lock.getWaitingThreads(c);
1311	>	shouldThrow();
1312	>	} catch (IllegalMonitorStateException success) {}
1313	>	}
1314	>
1315	>	/**
1316	>	* hasWaiters returns true when a thread is waiting, else false
1317	>	*/
1318	>	public void testHasWaiters() throws InterruptedException {
1319	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1320	>	final Condition c = lock.writeLock().newCondition();
1321	>	final CountDownLatch locked = new CountDownLatch(1);
1322	>	Thread t = newStartedThread(new CheckedRunnable() {
1323	>	public void realRun() throws InterruptedException {
1324	>	lock.writeLock().lock();
1325	>	assertFalse(lock.hasWaiters(c));
1326	>	locked.countDown();
1327	>	assertEquals(0, lock.getWaitQueueLength(c));
1328	>	c.await();
1329	>	lock.writeLock().unlock();
1330	>	}});
1331	>
1332	>	locked.await();
1333	>	lock.writeLock().lock();
1334	>	assertTrue(lock.hasWaiters(c));
1335	>	assertEquals(1, lock.getWaitQueueLength(c));
1336	>	c.signal();
1337	>	assertHasNoWaiters(lock, c);
1338	>	lock.writeLock().unlock();
1339	>	awaitTermination(t);
1340	>	assertHasNoWaiters(lock, c);
1341	>	}
1342	>
1343	>	/**
1344	>	* getWaitQueueLength returns number of waiting threads
1345	>	*/
1346	>	public void testGetWaitQueueLength() throws InterruptedException {
1347	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1348	>	final Condition c = lock.writeLock().newCondition();
1349	>	final CountDownLatch locked = new CountDownLatch(1);
1350	>	Thread t = newStartedThread(new CheckedRunnable() {
1351	>	public void realRun() throws InterruptedException {
1352	>	lock.writeLock().lock();
1353	>	assertEquals(0, lock.getWaitQueueLength(c));
1354	>	locked.countDown();
1355	>	c.await();
1356	>	lock.writeLock().unlock();
1357	>	}});
1358	>
1359	>	locked.await();
1360	>	lock.writeLock().lock();
1361	>	assertHasWaiters(lock, c, t);
1362	>	assertEquals(1, lock.getWaitQueueLength(c));
1363	>	c.signal();
1364	>	assertHasNoWaiters(lock, c);
1365	>	assertEquals(0, lock.getWaitQueueLength(c));
1366	>	lock.writeLock().unlock();
1367	>	awaitTermination(t);
1368	>	}
1369	>
1370	>	/**
1371	>	* getWaitingThreads returns only and all waiting threads
1372	>	*/
1373	>	public void testGetWaitingThreads() throws InterruptedException {
1374	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1375	>	final Condition c = lock.writeLock().newCondition();
1376	>	final CountDownLatch locked1 = new CountDownLatch(1);
1377	>	final CountDownLatch locked2 = new CountDownLatch(1);
1378	>	Thread t1 = new Thread(new CheckedRunnable() {
1379	>	public void realRun() throws InterruptedException {
1380	>	lock.writeLock().lock();
1381	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1382	>	locked1.countDown();
1383	>	c.await();
1384	>	lock.writeLock().unlock();
1385	>	}});
1386	>
1387	>	Thread t2 = new Thread(new CheckedRunnable() {
1388	>	public void realRun() throws InterruptedException {
1389	>	lock.writeLock().lock();
1390	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1391	>	locked2.countDown();
1392	>	c.await();
1393	>	lock.writeLock().unlock();
1394	>	}});
1395	>
1396	>	lock.writeLock().lock();
1397	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1398	>	lock.writeLock().unlock();
1399	>
1400	>	t1.start();
1401	>	locked1.await();
1402	>	t2.start();
1403	>	locked2.await();
1404	>
1405	>	lock.writeLock().lock();
1406	>	assertTrue(lock.hasWaiters(c));
1407	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1408	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1409	>	assertEquals(2, lock.getWaitingThreads(c).size());
1410	>	c.signalAll();
1411	>	assertHasNoWaiters(lock, c);
1412	>	lock.writeLock().unlock();
1413	>
1414	>	awaitTermination(t1);
1415	>	awaitTermination(t2);
1416	>
1417	>	assertHasNoWaiters(lock, c);
1418	>	}
1419	>
1420	>	/**
1421	>	* toString indicates current lock state
1422	>	*/
1423	>	public void testToString() {
1424	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1425	>	String us = lock.toString();
1426	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1427	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1428	>	lock.writeLock().lock();
1429	>	String ws = lock.toString();
1430	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1431	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1432	>	lock.writeLock().unlock();
1433	>	lock.readLock().lock();
1434	>	lock.readLock().lock();
1435	>	String rs = lock.toString();
1436	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1437	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1438	>	}
1439	>
1440	>	/**
1441	>	* readLock.toString indicates current lock state
1442	>	*/
1443	>	public void testReadLockToString() {
1444	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1445	>	String us = lock.readLock().toString();
1446	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1447	>	lock.readLock().lock();
1448	>	lock.readLock().lock();
1449	>	String rs = lock.readLock().toString();
1450	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1451	>	}
1452	>
1453	>	/**
1454	>	* writeLock.toString indicates current lock state
1455	>	*/
1456	>	public void testWriteLockToString() {
1457	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1458	>	String us = lock.writeLock().toString();
1459	>	assertTrue(us.indexOf("Unlocked") >= 0);
1460	>	lock.writeLock().lock();
1461	>	String ls = lock.writeLock().toString();
1462	>	assertTrue(ls.indexOf("Locked") >= 0);
1463		}
1464
1465		}

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