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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.11 by dl, Sat Dec 27 18:27:02 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 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 95 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
98	–
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 122 | 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());
190	<	}
191	<	for(int i = SIZE; i > 0; i--) {
192	<	lock.writeLock().unlock();
193	<	assertEquals(i-1,lock.getWriteHoldCount());
194	<	}
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		}
136	–
196
197		/**
198	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
198	>	* WriteLock.getHoldCount returns number of recursive holds
199		*/
200	<	public void testUnlock_IllegalMonitorStateException() {
201	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
202	<	try {
203	<	rl.writeLock().unlock();
204	<	shouldThrow();
205	<	} catch(IllegalMonitorStateException success){}
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	>	assertEquals(i-1,lock.writeLock().getHoldCount());
209	>	}
210		}
211
149	–
212		/**
213	<	* write-lockInterruptibly is interruptible
213	>	* getReadHoldCount returns number of recursive holds
214		*/
215	<	public void testWriteLockInterruptibly_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.writeLock().lockInterruptibly();
222	<	threadShouldThrow();
223	<	} catch(InterruptedException success){}
162	<	}
163	<	});
164	<	try {
165	<	t.start();
166	<	t.interrupt();
167	<	lock.writeLock().unlock();
168	<	t.join();
169	<	} catch(Exception e){
170	<	unexpectedException();
171	<	}
172	<	}
173	<
174	<	/**
175	<	* timed write-trylock is interruptible
176	<	*/
177	<	public void testWriteTryLock_Interrupted() {
178	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
179	<	lock.writeLock().lock();
180	<	Thread t = new Thread(new Runnable() {
181	<	public void run() {
182	<	try {
183	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
184	<	threadShouldThrow();
185	<	} catch(InterruptedException success){}
186	<	}
187	<	});
188	<	try {
189	<	t.start();
190	<	t.interrupt();
191	<	lock.writeLock().unlock();
192	<	t.join();
193	<	} catch(Exception e){
194	<	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
227		/**
228	<	* read-lockInterruptibly is interruptible
228	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testReadLockInterruptibly_Interrupted() {
231	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	<	lock.writeLock().lock();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run() {
206	<	try {
207	<	lock.readLock().lockInterruptibly();
208	<	threadShouldThrow();
209	<	} catch(InterruptedException success){}
210	<	}
211	<	});
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232		try {
233	<	t.start();
234	<	t.interrupt();
235	<	lock.writeLock().unlock();
216	<	t.join();
217	<	} catch(Exception e){
218	<	unexpectedException();
219	<	}
220	<	}
221	<
222	<	/**
223	<	* timed read-trylock is interruptible
224	<	*/
225	<	public void testReadTryLock_Interrupted() {
226	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
227	<	lock.writeLock().lock();
228	<	Thread t = new Thread(new Runnable() {
229	<	public void run() {
230	<	try {
231	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
232	<	threadShouldThrow();
233	<	} catch(InterruptedException success){}
234	<	}
235	<	});
236	<	try {
237	<	t.start();
238	<	t.interrupt();
239	<	t.join();
240	<	} catch(Exception e){
241	<	unexpectedException();
242	<	}
233	>	rl.writeLock().unlock();
234	>	shouldThrow();
235	>	} catch (IllegalMonitorStateException success) {}
236		}
237
245	–
246	–	/**
247	–	* write-trylock fails if locked
248	–	*/
249	–	public void testWriteTryLockWhenLocked() {
250	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	–	lock.writeLock().lock();
252	–	Thread t = new Thread(new Runnable() {
253	–	public void run() {
254	–	threadAssertFalse(lock.writeLock().tryLock());
255	–	}
256	–	});
257	–	try {
258	–	t.start();
259	–	t.join();
260	–	lock.writeLock().unlock();
261	–	} catch(Exception e){
262	–	unexpectedException();
263	–	}
264	–	}
265	–
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();
271	<	lock.writeLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	threadAssertFalse(lock.readLock().tryLock());
275	<	}
276	<	});
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){
282	<	unexpectedException();
283	<	}
284	<	}
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();
302	<	} catch(Exception e){
303	<	unexpectedException();
304	<	}
305	<	}
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();
317	<	}
318	<	});
319	<	Thread t2 = new Thread(new Runnable() {
320	<	public void run() {
321	<	lock.writeLock().lock();
322	<	lock.writeLock().unlock();
323	<	}
324	<	});
325	<
326	<	try {
327	<	t1.start();
328	<	t2.start();
329	<	Thread.sleep(SHORT_DELAY_MS);
330	<	lock.readLock().unlock();
331	<	t1.join(MEDIUM_DELAY_MS);
332	<	t2.join(MEDIUM_DELAY_MS);
333	<	assertTrue(!t1.isAlive());
334	<	assertTrue(!t2.isAlive());
335	<
336	<	} catch(Exception e){
337	<	unexpectedException();
338	<	}
339	<	}
340	<
341	<	/**
342	<	* Readlocks succeed after a writing thread unlocks
343	<	*/
344	<	public void testReadAfterWriteLock() {
345	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
346	<	lock.writeLock().lock();
347	<	Thread t1 = new Thread(new Runnable() {
348	<	public void run() {
349	<	lock.readLock().lock();
350	<	lock.readLock().unlock();
351	<	}
352	<	});
353	<	Thread t2 = new Thread(new Runnable() {
354	<	public void run() {
355	<	lock.readLock().lock();
356	<	lock.readLock().unlock();
357	<	}
358	<	});
359	<
360	<	try {
361	<	t1.start();
362	<	t2.start();
363	<	Thread.sleep(SHORT_DELAY_MS);
364	<	lock.writeLock().unlock();
365	<	t1.join(MEDIUM_DELAY_MS);
366	<	t2.join(MEDIUM_DELAY_MS);
367	<	assertTrue(!t1.isAlive());
368	<	assertTrue(!t2.isAlive());
369	<
370	<	} catch(Exception e){
371	<	unexpectedException();
372	<	}
373	<	}
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 trylock succeeds if readlocked but not writelocked
285	<	*/
286	<	public void testTryLockWhenReadLocked() {
287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.readLock().lock();
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run() {
291	<	threadAssertTrue(lock.readLock().tryLock());
292	<	lock.readLock().unlock();
386	<	}
387	<	});
388	<	try {
389	<	t.start();
390	<	t.join();
391	<	lock.readLock().unlock();
392	<	} catch(Exception e){
393	<	unexpectedException();
394	<	}
395	<	}
284	>	* read-lockInterruptibly is interruptible
285	>	*/
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	<
294	>	waitForQueuedThread(lock, t);
295	>	t.interrupt();
296	>	awaitTermination(t);
297	>	releaseWriteLock(lock);
298	>	}
299
300		/**
301	<	* write trylock fails when readlocked
301	>	* timed read-tryLock is interruptible
302		*/
303	<	public void testWriteTryLockWhenReadLocked() {
304	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	<	lock.readLock().lock();
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	threadAssertFalse(lock.writeLock().tryLock());
309	<	}
409	<	});
410	<	try {
411	<	t.start();
412	<	t.join();
413	<	lock.readLock().unlock();
414	<	} catch(Exception e){
415	<	unexpectedException();
416	<	}
417	<	}
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 timed trylock times out if locked
319	<	*/
320	<	public void testWriteTryLock_Timeout() {
321	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	<	lock.writeLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	try {
326	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
327	<	} catch (Exception ex) {
328	<	threadUnexpectedException();
329	<	}
330	<	}
435	<	});
436	<	try {
437	<	t.start();
438	<	t.join();
439	<	lock.writeLock().unlock();
440	<	} catch(Exception e){
441	<	unexpectedException();
442	<	}
443	<	}
318	>	* write-tryLock fails if locked
319	>	*/
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 timed trylock times out if write-locked
333	>	* read-tryLock fails if locked
334		*/
335	<	public void testReadTryLock_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.readLock().tryLock(1, TimeUnit.MILLISECONDS));
342	<	} catch (Exception ex) {
343	<	threadUnexpectedException();
344	<	}
345	<	}
459	<	});
460	<	try {
461	<	t.start();
462	<	t.join();
463	<	lock.writeLock().unlock();
464	<	} catch(Exception e){
465	<	unexpectedException();
466	<	}
467	<	}
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() 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();
485	<	}
486	<	catch(InterruptedException success) {
487	<	}
488	<	}
489	<	});
490	<	try {
491	<	t.start();
492	<	t.interrupt();
493	<	t.join();
494	<	lock.writeLock().unlock();
495	<	} catch(Exception e){
496	<	unexpectedException();
497	<	}
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();
515	<	}
516	<	catch(InterruptedException success) {
517	<	}
518	<	}
519	<	});
520	<	try {
521	<	t.start();
522	<	t.interrupt();
523	<	t.join();
524	<	lock.writeLock().unlock();
525	<	} catch(Exception e){
526	<	unexpectedException();
527	<	}
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	<	}
542	<	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	<	}
557	<	catch (IllegalMonitorStateException success) {
558	<	}
559	<	catch (Exception ex) {
560	<	unexpectedException();
561	<	}
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);
574	<	lock.writeLock().unlock();
575	<	}
576	<	catch (Exception ex) {
577	<	unexpectedException();
578	<	}
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) {
594	<	unexpectedException();
595	<	}
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)));
608	<	lock.writeLock().unlock();
609	<	}
610	<	catch (Exception ex) {
611	<	unexpectedException();
612	<	}
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();
636	<	Thread.sleep(SHORT_DELAY_MS);
637	<	lock.writeLock().lock();
638	<	c.signal();
639	<	lock.writeLock().unlock();
640	<	t.join(SHORT_DELAY_MS);
641	<	assertFalse(t.isAlive());
642	<	}
643	<	catch (Exception ex) {
644	<	unexpectedException();
645	<	}
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();
675	<	}
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	<	});
1021	<
1022	<	try {
1023	<	t1.start();
1024	<	t2.start();
1025	<	Thread.sleep(SHORT_DELAY_MS);
1026	<	lock.writeLock().lock();
1027	<	c.signalAll();
1028	<	lock.writeLock().unlock();
1029	<	t1.join(SHORT_DELAY_MS);
1030	<	t2.join(SHORT_DELAY_MS);
1031	<	assertFalse(t1.isAlive());
1032	<	assertFalse(t2.isAlive());
1033	<	}
1034	<	catch (Exception ex) {
1035	<	unexpectedException();
1036	<	}
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	>	/**
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();
869	<	t2.join();
870	<	} catch(Exception e){
871	<	unexpectedException();
872	<	}
873	<	}
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();
887	<	Thread.sleep(SHORT_DELAY_MS);
888	<	assertTrue(lock.getQueuedThreads().contains(t1));
889	<	t2.start();
890	<	Thread.sleep(SHORT_DELAY_MS);
891	<	assertTrue(lock.getQueuedThreads().contains(t1));
892	<	assertTrue(lock.getQueuedThreads().contains(t2));
893	<	t1.interrupt();
894	<	Thread.sleep(SHORT_DELAY_MS);
895	<	assertFalse(lock.getQueuedThreads().contains(t1));
896	<	assertTrue(lock.getQueuedThreads().contains(t2));
897	<	lock.writeLock().unlock();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().isEmpty());
900	<	t1.join();
901	<	t2.join();
902	<	} catch(Exception e){
903	<	unexpectedException();
904	<	}
905	<	}
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 AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1224	<	Thread t = new Thread(new Runnable() {
1225	<	public void run() {
1226	<	try {
1227	<	lock.writeLock().lock();
917	<	threadAssertFalse(c.hasWaiters());
918	<	threadAssertEquals(0, c.getWaitQueueLength());
919	<	c.await();
920	<	lock.writeLock().unlock();
921	<	}
922	<	catch(InterruptedException e) {
923	<	threadUnexpectedException();
924	<	}
925	<	}
926	<	});
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();
1238	<	assertTrue(c.hasWaiters());
1239	<	assertEquals(1, c.getWaitQueueLength());
1240	<	c.signal();
1241	<	lock.writeLock().unlock();
1242	<	Thread.sleep(SHORT_DELAY_MS);
1243	<	lock.writeLock().lock();
1244	<	assertFalse(c.hasWaiters());
1245	<	assertEquals(0, c.getWaitQueueLength());
1246	<	lock.writeLock().unlock();
1247	<	t.join(SHORT_DELAY_MS);
1248	<	assertFalse(t.isAlive());
1249	<	}
1250	<	catch (Exception ex) {
1251	<	unexpectedException();
1252	<	}
1235	>	lock.getWaitingThreads(null);
1236	>	shouldThrow();
1237	>	} catch (NullPointerException success) {}
1238	>	}
1239	>
1240	>	/**
1241	>	* hasWaiters throws IAE if not owned
1242	>	*/
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	>	lock.hasWaiters(c);
1261	>	shouldThrow();
1262	>	} catch (IllegalMonitorStateException success) {}
1263	>	}
1264	>
1265	>	/**
1266	>	* getWaitQueueLength throws IAE if not owned
1267	>	*/
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.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() {
1347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1349	<	Thread t1 = new Thread(new Runnable() {
1350	<	public void run() {
1351	<	try {
1352	<	lock.writeLock().lock();
1353	<	threadAssertFalse(c.hasWaiters());
1354	<	threadAssertEquals(0, c.getWaitQueueLength());
1355	<	c.await();
1356	<	lock.writeLock().unlock();
1357	<	}
1358	<	catch(InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1363	<
1364	<	Thread t2 = new Thread(new Runnable() {
1365	<	public void run() {
1366	<	try {
1367	<	lock.writeLock().lock();
1368	<	threadAssertTrue(c.hasWaiters());
1369	<	threadAssertEquals(1, c.getWaitQueueLength());
1370	<	c.await();
1371	<	lock.writeLock().unlock();
1372	<	}
1373	<	catch(InterruptedException e) {
1374	<	threadUnexpectedException();
1375	<	}
1376	<	}
1377	<	});
1378	<
1379	<	try {
1380	<	t1.start();
1381	<	Thread.sleep(SHORT_DELAY_MS);
1382	<	t2.start();
1383	<	Thread.sleep(SHORT_DELAY_MS);
1384	<	lock.writeLock().lock();
1385	<	assertTrue(c.hasWaiters());
1386	<	assertEquals(2, c.getWaitQueueLength());
1387	<	c.signalAll();
1388	<	lock.writeLock().unlock();
1389	<	Thread.sleep(SHORT_DELAY_MS);
1390	<	lock.writeLock().lock();
1391	<	assertFalse(c.hasWaiters());
1392	<	assertEquals(0, c.getWaitQueueLength());
1393	<	lock.writeLock().unlock();
1394	<	t1.join(SHORT_DELAY_MS);
1395	<	t2.join(SHORT_DELAY_MS);
1396	<	assertFalse(t1.isAlive());
1397	<	assertFalse(t2.isAlive());
1398	<	}
1399	<	catch (Exception ex) {
1400	<	unexpectedException();
1401	<	}
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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