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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.6 by dl, Mon Nov 10 13:32:08 2003 UTC vs.
Revision 1.57 by dl, Sat May 7 11:15:04 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 WriterConditionObject newCondition() {
57	<	return new PublicCondition(this);
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	<	static class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
72	<	PublicCondition(PublicReentrantReadWriteLock l) { super(l); }
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.getReadLocks());
122	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
121	>	assertEquals(0, rl.getReadLockCount());
122	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
123		assertTrue(r2.isFair());
124		assertFalse(r2.isWriteLocked());
125	<	assertEquals(0, r2.getReadLocks());
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	<	assertEquals(0, rl.getReadLocks());
140	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
141	>	assertEquals(0, rl.getReadLockCount());
142		rl.writeLock().unlock();
143		assertFalse(rl.isWriteLocked());
144		assertFalse(rl.isWriteLockedByCurrentThread());
145	<	assertEquals(0, rl.getReadLocks());
145	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
146	>	assertEquals(0, rl.getReadLockCount());
147		rl.readLock().lock();
148		assertFalse(rl.isWriteLocked());
149		assertFalse(rl.isWriteLockedByCurrentThread());
150	<	assertEquals(1, rl.getReadLocks());
150	>	assertEquals(1, rl.getReadLockCount());
151		rl.readLock().unlock();
152		assertFalse(rl.isWriteLocked());
153		assertFalse(rl.isWriteLockedByCurrentThread());
154	<	assertEquals(0, rl.getReadLocks());
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	<	assertEquals(0, rl.getReadLocks());
165	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
166	>	assertEquals(0, rl.getReadLockCount());
167		rl.writeLock().unlock();
168		assertFalse(rl.isWriteLocked());
169		assertFalse(rl.isWriteLockedByCurrentThread());
170	<	assertEquals(0, rl.getReadLocks());
170	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
171	>	assertEquals(0, rl.getReadLockCount());
172		rl.readLock().lock();
173		assertFalse(rl.isWriteLocked());
174		assertFalse(rl.isWriteLockedByCurrentThread());
175	<	assertEquals(1, rl.getReadLocks());
175	>	assertEquals(1, rl.getReadLockCount());
176		rl.readLock().unlock();
177		assertFalse(rl.isWriteLocked());
178		assertFalse(rl.isWriteLockedByCurrentThread());
179	<	assertEquals(0, rl.getReadLocks());
179	>	assertEquals(0, rl.getReadLockCount());
180		}
181
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	>	delay(SHORT_DELAY_MS);
380	>	lock.readLock().unlock();
381	>	awaitTermination(t1);
382	>	awaitTermination(t2);
383	>	assertNotWriteLocked(lock);
384	>	}
385	>
386	>	/**
387	>	* Readlocks succeed only after a writing thread unlocks
388	>	*/
389	>	public void testReadAfterWriteLock() throws InterruptedException {
390	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391	>	lock.writeLock().lock();
392	>	Thread t1 = newStartedThread(new CheckedRunnable() {
393	>	public void realRun() {
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	}});
397	>	Thread t2 = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}});
402	>
403	>	waitForQueuedThread(lock, t1);
404	>	waitForQueuedThread(lock, t2);
405	>	releaseWriteLock(lock);
406	>	awaitTermination(t1);
407	>	awaitTermination(t2);
408	>	}
409	>
410	>	/**
411	>	* Read trylock succeeds if write locked by current thread
412	>	*/
413	>	public void testReadHoldingWriteLock() {
414	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
415	>	lock.writeLock().lock();
416	>	assertTrue(lock.readLock().tryLock());
417	>	lock.readLock().unlock();
418	>	lock.writeLock().unlock();
419	>	}
420	>
421	>	/**
422	>	* Read lock succeeds if write locked by current thread even if
423	>	* other threads are waiting for readlock
424	>	*/
425	>	public void testReadHoldingWriteLock2() throws InterruptedException {
426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
427	>	lock.writeLock().lock();
428	>	lock.readLock().lock();
429	>	lock.readLock().unlock();
430	>
431	>	Thread t1 = newStartedThread(new CheckedRunnable() {
432	>	public void realRun() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}});
436	>	Thread t2 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.readLock().lock();
439	>	lock.readLock().unlock();
440	>	}});
441	>
442	>	waitForQueuedThread(lock, t1);
443	>	waitForQueuedThread(lock, t2);
444	>	assertTrue(lock.isWriteLockedByCurrentThread());
445	>	lock.readLock().lock();
446	>	lock.readLock().unlock();
447	>	releaseWriteLock(lock);
448	>	awaitTermination(t1);
449	>	awaitTermination(t2);
450	>	}
451	>
452	>	/**
453	>	* Read lock succeeds if write locked by current thread even if
454	>	* other threads are waiting for writelock
455	>	*/
456	>	public void testReadHoldingWriteLock3() throws InterruptedException {
457	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	lock.writeLock().lock();
459	>	lock.readLock().lock();
460	>	lock.readLock().unlock();
461	>
462	>	Thread t1 = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() {
464	>	lock.writeLock().lock();
465	>	lock.writeLock().unlock();
466	>	}});
467	>	Thread t2 = newStartedThread(new CheckedRunnable() {
468	>	public void realRun() {
469	>	lock.writeLock().lock();
470	>	lock.writeLock().unlock();
471	>	}});
472	>
473	>	waitForQueuedThread(lock, t1);
474	>	waitForQueuedThread(lock, t2);
475	>	assertTrue(lock.isWriteLockedByCurrentThread());
476	>	lock.readLock().lock();
477	>	lock.readLock().unlock();
478	>	releaseWriteLock(lock);
479	>	awaitTermination(t1);
480	>	awaitTermination(t2);
481	>	}
482	>
483	>	/**
484	>	* Write lock succeeds if write locked by current thread even if
485	>	* other threads are waiting for writelock
486	>	*/
487	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
488	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
489	>	lock.writeLock().lock();
490	>	lock.writeLock().lock();
491	>	lock.writeLock().unlock();
492	>
493	>	Thread t1 = newStartedThread(new CheckedRunnable() {
494	>	public void realRun() {
495	>	lock.writeLock().lock();
496	>	lock.writeLock().unlock();
497	>	}});
498	>	Thread t2 = newStartedThread(new CheckedRunnable() {
499	>	public void realRun() {
500	>	lock.writeLock().lock();
501	>	lock.writeLock().unlock();
502	>	}});
503	>
504	>	waitForQueuedThread(lock, t1);
505	>	waitForQueuedThread(lock, t2);
506	>	assertTrue(lock.isWriteLockedByCurrentThread());
507	>	assertEquals(1, lock.getWriteHoldCount());
508	>	lock.writeLock().lock();
509	>	assertTrue(lock.isWriteLockedByCurrentThread());
510	>	assertEquals(2, lock.getWriteHoldCount());
511	>	lock.writeLock().unlock();
512	>	releaseWriteLock(lock);
513	>	awaitTermination(t1);
514	>	awaitTermination(t2);
515	>	}
516	>
517	>	/**
518	>	* Fair Read trylock succeeds if write locked by current thread
519	>	*/
520	>	public void testReadHoldingWriteLockFair() {
521	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
522	>	lock.writeLock().lock();
523	>	assertTrue(lock.readLock().tryLock());
524	>	lock.readLock().unlock();
525	>	lock.writeLock().unlock();
526	>	}
527	>
528	>	/**
529	>	* Fair Read lock succeeds if write locked by current thread even if
530	>	* other threads are waiting for readlock
531	>	*/
532	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
533	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
534	>	lock.writeLock().lock();
535	>	lock.readLock().lock();
536	>	lock.readLock().unlock();
537	>
538	>	Thread t1 = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() {
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	}});
543	>	Thread t2 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() {
545	>	lock.readLock().lock();
546	>	lock.readLock().unlock();
547	>	}});
548	>
549	>	waitForQueuedThread(lock, t1);
550	>	waitForQueuedThread(lock, t2);
551	>	assertTrue(lock.isWriteLockedByCurrentThread());
552	>	lock.readLock().lock();
553	>	lock.readLock().unlock();
554	>	releaseWriteLock(lock);
555	>	awaitTermination(t1);
556	>	awaitTermination(t2);
557	>	}
558	>
559	>	/**
560	>	* Fair Read lock succeeds if write locked by current thread even if
561	>	* other threads are waiting for writelock
562	>	*/
563	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
564	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
565	>	lock.writeLock().lock();
566	>	lock.readLock().lock();
567	>	lock.readLock().unlock();
568	>
569	>	Thread t1 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.writeLock().lock();
572	>	lock.writeLock().unlock();
573	>	}});
574	>	Thread t2 = newStartedThread(new CheckedRunnable() {
575	>	public void realRun() {
576	>	lock.writeLock().lock();
577	>	lock.writeLock().unlock();
578	>	}});
579	>
580	>	waitForQueuedThread(lock, t1);
581	>	waitForQueuedThread(lock, t2);
582	>	assertTrue(lock.isWriteLockedByCurrentThread());
583	>	lock.readLock().lock();
584	>	lock.readLock().unlock();
585	>	releaseWriteLock(lock);
586	>	awaitTermination(t1);
587	>	awaitTermination(t2);
588	>	}
589	>
590	>	/**
591	>	* Fair Write lock succeeds if write locked by current thread even if
592	>	* other threads are waiting for writelock
593	>	*/
594	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
595	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596	>	lock.writeLock().lock();
597	>	Thread t1 = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	lock.writeLock().lock();
600	>	lock.writeLock().unlock();
601	>	}});
602	>	Thread t2 = newStartedThread(new CheckedRunnable() {
603	>	public void realRun() {
604	>	lock.writeLock().lock();
605	>	lock.writeLock().unlock();
606	>	}});
607	>
608	>	waitForQueuedThread(lock, t1);
609	>	waitForQueuedThread(lock, t2);
610	>	assertTrue(lock.isWriteLockedByCurrentThread());
611	>	assertEquals(1, lock.getWriteHoldCount());
612	>	lock.writeLock().lock();
613	>	assertEquals(2, lock.getWriteHoldCount());
614	>	lock.writeLock().unlock();
615	>	lock.writeLock().lock();
616	>	lock.writeLock().unlock();
617	>	releaseWriteLock(lock);
618	>	awaitTermination(t1);
619	>	awaitTermination(t2);
620	>	}
621	>
622	>	/**
623	>	* Read tryLock succeeds if readlocked but not writelocked
624	>	*/
625	>	public void testTryLockWhenReadLocked() throws InterruptedException {
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertTrue(lock.readLock().tryLock());
631	>	lock.readLock().unlock();
632	>	}});
633	>
634	>	awaitTermination(t);
635	>	lock.readLock().unlock();
636	>	}
637	>
638	>	/**
639	>	* write tryLock fails when readlocked
640	>	*/
641	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
642	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	>	lock.readLock().lock();
644	>	Thread t = newStartedThread(new CheckedRunnable() {
645	>	public void realRun() {
646	>	assertFalse(lock.writeLock().tryLock());
647	>	}});
648	>
649	>	awaitTermination(t);
650	>	lock.readLock().unlock();
651	>	}
652	>
653	>	/**
654	>	* Fair Read tryLock succeeds if readlocked but not writelocked
655	>	*/
656	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
657	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
658	>	lock.readLock().lock();
659	>	Thread t = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	assertTrue(lock.readLock().tryLock());
662	>	lock.readLock().unlock();
663	>	}});
664	>
665	>	awaitTermination(t);
666	>	lock.readLock().unlock();
667	>	}
668	>
669	>	/**
670	>	* Fair write tryLock fails when readlocked
671	>	*/
672	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
673	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	>	lock.readLock().lock();
675	>	Thread t = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	assertFalse(lock.writeLock().tryLock());
678	>	}});
679	>
680	>	awaitTermination(t);
681	>	lock.readLock().unlock();
682	>	}
683	>
684	>	/**
685	>	* write timed tryLock times out if locked
686	>	*/
687	>	public void testWriteTryLock_Timeout() throws InterruptedException {
688	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	>	lock.writeLock().lock();
690	>	Thread t = newStartedThread(new CheckedRunnable() {
691	>	public void realRun() throws InterruptedException {
692	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693	>	}});
694	>
695	>	awaitTermination(t);
696	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
697	>	lock.writeLock().unlock();
698	>	}
699	>
700	>	/**
701	>	* read timed tryLock times out if write-locked
702	>	*/
703	>	public void testReadTryLock_Timeout() throws InterruptedException {
704	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	lock.writeLock().lock();
706	>	Thread t = newStartedThread(new CheckedRunnable() {
707	>	public void realRun() throws InterruptedException {
708	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
709	>	}});
710	>
711	>	awaitTermination(t);
712	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
713	>	lock.writeLock().unlock();
714	>	}
715
716		/**
717		* write lockInterruptibly succeeds if lock free else is interruptible
718		*/
719	<	public void testWriteLockInterruptibly() {
720	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	<	try {
722	<	lock.writeLock().lockInterruptibly();
723	<	} catch(Exception e) {
724	<	unexpectedException();
725	<	}
726	<	Thread t = new Thread(new Runnable() {
727	<	public void run() {
728	<	try {
729	<	lock.writeLock().lockInterruptibly();
730	<	threadShouldThrow();
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	<	}
719	>	public void testWriteLockInterruptibly() throws InterruptedException {
720	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	>	lock.writeLock().lockInterruptibly();
722	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
723	>	public void realRun() throws InterruptedException {
724	>	lock.writeLock().lockInterruptibly();
725	>	}});
726	>
727	>	waitForQueuedThread(lock, t);
728	>	t.interrupt();
729	>	awaitTermination(t);
730	>	releaseWriteLock(lock);
731		}
732
733		/**
734	<	*  read lockInterruptibly succeeds if lock free else is interruptible
734	>	* read lockInterruptibly succeeds if lock free else is interruptible
735		*/
736	<	public void testReadLockInterruptibly() {
737	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738	<	try {
739	<	lock.writeLock().lockInterruptibly();
740	<	} catch(Exception e) {
741	<	unexpectedException();
742	<	}
743	<	Thread t = new Thread(new Runnable() {
744	<	public void run() {
745	<	try {
746	<	lock.readLock().lockInterruptibly();
747	<	threadShouldThrow();
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	<	}
736	>	public void testReadLockInterruptibly() throws InterruptedException {
737	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738	>	lock.writeLock().lockInterruptibly();
739	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	lock.readLock().lockInterruptibly();
742	>	}});
743	>
744	>	waitForQueuedThread(lock, t);
745	>	t.interrupt();
746	>	awaitTermination(t);
747	>	releaseWriteLock(lock);
748		}
749
750		/**
751		* Calling await without holding lock throws IllegalMonitorStateException
752		*/
753	<	public void testAwait_IllegalMonitor() {
754	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
753	>	public void testAwait_IllegalMonitor() throws InterruptedException {
754	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
755		final Condition c = lock.writeLock().newCondition();
756		try {
757		c.await();
758		shouldThrow();
759	<	}
760	<	catch (IllegalMonitorStateException success) {
761	<	}
553	<	catch (Exception ex) {
759	>	} catch (IllegalMonitorStateException success) {}
760	>	try {
761	>	c.await(LONG_DELAY_MS, MILLISECONDS);
762		shouldThrow();
763	<	}
763	>	} catch (IllegalMonitorStateException success) {}
764	>	try {
765	>	c.awaitNanos(100);
766	>	shouldThrow();
767	>	} catch (IllegalMonitorStateException success) {}
768	>	try {
769	>	c.awaitUninterruptibly();
770	>	shouldThrow();
771	>	} catch (IllegalMonitorStateException success) {}
772		}
773
774		/**
775		* Calling signal without holding lock throws IllegalMonitorStateException
776		*/
777		public void testSignal_IllegalMonitor() {
778	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
778	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
779		final Condition c = lock.writeLock().newCondition();
780		try {
781		c.signal();
782		shouldThrow();
783	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
783	>	} catch (IllegalMonitorStateException success) {}
784		}
785
786		/**
787	<	* awaitNanos without a signal times out
787	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
788		*/
789	<	public void testAwaitNanos_Timeout() {
790	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
789	>	public void testSignalAll_IllegalMonitor() {
790	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
791		final Condition c = lock.writeLock().newCondition();
792		try {
793	<	lock.writeLock().lock();
794	<	long t = c.awaitNanos(100);
795	<	assertTrue(t <= 0);
585	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
793	>	c.signalAll();
794	>	shouldThrow();
795	>	} catch (IllegalMonitorStateException success) {}
796		}
797
798	+	/**
799	+	* awaitNanos without a signal times out
800	+	*/
801	+	public void testAwaitNanos_Timeout() throws InterruptedException {
802	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803	+	final Condition c = lock.writeLock().newCondition();
804	+	lock.writeLock().lock();
805	+	long startTime = System.nanoTime();
806	+	long timeoutMillis = 10;
807	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
808	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
809	+	assertTrue(nanosRemaining <= 0);
810	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
811	+	lock.writeLock().unlock();
812	+	}
813
814		/**
815	<	*  timed await without a signal times out
815	>	* timed await without a signal times out
816		*/
817	<	public void testAwait_Timeout() {
818	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817	>	public void testAwait_Timeout() throws InterruptedException {
818	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819		final Condition c = lock.writeLock().newCondition();
820	<	try {
821	<	lock.writeLock().lock();
822	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
823	<	lock.writeLock().unlock();
824	<	}
825	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
820	>	lock.writeLock().lock();
821	>	long startTime = System.nanoTime();
822	>	long timeoutMillis = 10;
823	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
824	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
825	>	lock.writeLock().unlock();
826		}
827
828		/**
829		* awaitUntil without a signal times out
830		*/
831	<	public void testAwaitUntil_Timeout() {
832	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831	>	public void testAwaitUntil_Timeout() throws InterruptedException {
832	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
833		final Condition c = lock.writeLock().newCondition();
834	<	try {
835	<	lock.writeLock().lock();
836	<	java.util.Date d = new java.util.Date();
837	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
834	>	lock.writeLock().lock();
835	>	java.util.Date d = new java.util.Date();
836	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
837	>	lock.writeLock().unlock();
838		}
839
840		/**
841		* await returns when signalled
842		*/
843	<	public void testAwait() {
844	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
843	>	public void testAwait() throws InterruptedException {
844	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845		final Condition c = lock.writeLock().newCondition();
846	<	Thread t = new Thread(new Runnable() {
847	<	public void run() {
848	<	try {
849	<	lock.writeLock().lock();
850	<	c.await();
851	<	lock.writeLock().unlock();
852	<	}
853	<	catch(InterruptedException e) {
854	<	threadUnexpectedException();
855	<	}
856	<	}
857	<	});
858	<
859	<	try {
860	<	t.start();
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	<	}
846	>	final CountDownLatch locked = new CountDownLatch(1);
847	>	Thread t = newStartedThread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.writeLock().lock();
850	>	locked.countDown();
851	>	c.await();
852	>	lock.writeLock().unlock();
853	>	}});
854	>
855	>	locked.await();
856	>	lock.writeLock().lock();
857	>	c.signal();
858	>	assertTrue(t.isAlive());
859	>	lock.writeLock().unlock();
860	>	awaitTermination(t);
861		}
862
863		/**
864		* awaitUninterruptibly doesn't abort on interrupt
865		*/
866	<	public void testAwaitUninterruptibly() {
867	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
866	>	public void testAwaitUninterruptibly() throws InterruptedException {
867	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868		final Condition c = lock.writeLock().newCondition();
869	<	Thread t = new Thread(new Runnable() {
870	<	public void run() {
871	<	lock.writeLock().lock();
872	<	c.awaitUninterruptibly();
873	<	lock.writeLock().unlock();
874	<	}
875	<	});
876	<
877	<	try {
878	<	t.start();
879	<	Thread.sleep(SHORT_DELAY_MS);
880	<	t.interrupt();
881	<	lock.writeLock().lock();
882	<	c.signal();
883	<	lock.writeLock().unlock();
884	<	assert(t.isInterrupted());
885	<	t.join(SHORT_DELAY_MS);
886	<	assertFalse(t.isAlive());
887	<	}
888	<	catch (Exception ex) {
889	<	unexpectedException();
686	<	}
869	>	final CountDownLatch locked = new CountDownLatch(1);
870	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
871	>	Thread t = newStartedThread(new CheckedRunnable() {
872	>	public void realRun() {
873	>	lock.writeLock().lock();
874	>	locked.countDown();
875	>	c.awaitUninterruptibly();
876	>	assertTrue(Thread.interrupted());
877	>	lock.writeLock().unlock();
878	>	}});
879	>
880	>	locked.await();
881	>	lock.writeLock().lock();
882	>	lock.writeLock().unlock();
883	>	t.interrupt();
884	>	t.join(10);
885	>	assertTrue(t.isAlive());
886	>	lock.writeLock().lock();
887	>	c.signal();
888	>	lock.writeLock().unlock();
889	>	awaitTermination(t);
890		}
891
892		/**
893		* await is interruptible
894		*/
895	<	public void testAwait_Interrupt() {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
895	>	public void testAwait_Interrupt() throws InterruptedException {
896	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
897		final Condition c = lock.writeLock().newCondition();
898	<	Thread t = new Thread(new Runnable() {
899	<	public void run() {
900	<	try {
901	<	lock.writeLock().lock();
902	<	c.await();
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch(InterruptedException success) {
907	<	}
908	<	}
909	<	});
910	<
911	<	try {
912	<	t.start();
913	<	Thread.sleep(SHORT_DELAY_MS);
914	<	t.interrupt();
915	<	t.join(SHORT_DELAY_MS);
916	<	assertFalse(t.isAlive());
917	<	}
918	<	catch (Exception ex) {
919	<	unexpectedException();
920	<	}
898	>	final CountDownLatch locked = new CountDownLatch(1);
899	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
900	>	public void realRun() throws InterruptedException {
901	>	lock.writeLock().lock();
902	>	assertTrue(lock.isWriteLocked());
903	>	assertTrue(lock.isWriteLockedByCurrentThread());
904	>	assertHasNoWaiters(lock, c);
905	>	locked.countDown();
906	>	try {
907	>	c.await();
908	>	} finally {
909	>	assertTrue(lock.isWriteLocked());
910	>	assertTrue(lock.isWriteLockedByCurrentThread());
911	>	assertHasNoWaiters(lock, c);
912	>	lock.writeLock().unlock();
913	>	assertFalse(Thread.interrupted());
914	>	}
915	>	}});
916	>
917	>	locked.await();
918	>	assertHasWaiters(lock, c, t);
919	>	t.interrupt();
920	>	awaitTermination(t);
921	>	assertFalse(lock.isWriteLocked());
922		}
923
924		/**
925		* awaitNanos is interruptible
926		*/
927	<	public void testAwaitNanos_Interrupt() {
928	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
927	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
928	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
929		final Condition c = lock.writeLock().newCondition();
930	<	Thread t = new Thread(new Runnable() {
931	<	public void run() {
932	<	try {
933	<	lock.writeLock().lock();
934	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
935	<	lock.writeLock().unlock();
936	<	threadShouldThrow();
937	<	}
938	<	catch(InterruptedException success) {
939	<	}
940	<	}
941	<	});
942	<
943	<	try {
944	<	t.start();
945	<	Thread.sleep(SHORT_DELAY_MS);
946	<	t.interrupt();
947	<	t.join(SHORT_DELAY_MS);
948	<	assertFalse(t.isAlive());
949	<	}
950	<	catch (Exception ex) {
951	<	unexpectedException();
952	<	}
930	>	final CountDownLatch locked = new CountDownLatch(1);
931	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
932	>	public void realRun() throws InterruptedException {
933	>	lock.writeLock().lock();
934	>	assertTrue(lock.isWriteLocked());
935	>	assertTrue(lock.isWriteLockedByCurrentThread());
936	>	assertHasNoWaiters(lock, c);
937	>	locked.countDown();
938	>	try {
939	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
940	>	} finally {
941	>	assertTrue(lock.isWriteLocked());
942	>	assertTrue(lock.isWriteLockedByCurrentThread());
943	>	assertHasNoWaiters(lock, c);
944	>	lock.writeLock().unlock();
945	>	assertFalse(Thread.interrupted());
946	>	}
947	>	}});
948	>
949	>	locked.await();
950	>	assertHasWaiters(lock, c, t);
951	>	t.interrupt();
952	>	awaitTermination(t);
953	>	assertFalse(lock.isWriteLocked());
954		}
955
956		/**
957		* awaitUntil is interruptible
958		*/
959	<	public void testAwaitUntil_Interrupt() {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
959	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
960	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
961		final Condition c = lock.writeLock().newCondition();
962	<	Thread t = new Thread(new Runnable() {
963	<	public void run() {
964	<	try {
965	<	lock.writeLock().lock();
966	<	java.util.Date d = new java.util.Date();
967	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
968	<	lock.writeLock().unlock();
969	<	threadShouldThrow();
970	<	}
971	<	catch(InterruptedException success) {
972	<	}
973	<	}
974	<	});
975	<
976	<	try {
977	<	t.start();
978	<	Thread.sleep(SHORT_DELAY_MS);
979	<	t.interrupt();
980	<	t.join(SHORT_DELAY_MS);
981	<	assertFalse(t.isAlive());
982	<	}
983	<	catch (Exception ex) {
984	<	unexpectedException();
985	<	}
962	>	final CountDownLatch locked = new CountDownLatch(1);
963	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
964	>	public void realRun() throws InterruptedException {
965	>	lock.writeLock().lock();
966	>	assertTrue(lock.isWriteLocked());
967	>	assertTrue(lock.isWriteLockedByCurrentThread());
968	>	assertHasNoWaiters(lock, c);
969	>	locked.countDown();
970	>	java.util.Date d = new java.util.Date();
971	>	try {
972	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
973	>	} finally {
974	>	assertTrue(lock.isWriteLocked());
975	>	assertTrue(lock.isWriteLockedByCurrentThread());
976	>	assertHasNoWaiters(lock, c);
977	>	lock.writeLock().unlock();
978	>	assertFalse(Thread.interrupted());
979	>	}
980	>	}});
981	>
982	>	locked.await();
983	>	assertHasWaiters(lock, c, t);
984	>	t.interrupt();
985	>	awaitTermination(t);
986	>	assertFalse(lock.isWriteLocked());
987		}
988
989		/**
990		* signalAll wakes up all threads
991		*/
992	<	public void testSignalAll() {
993	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
992	>	public void testSignalAll() throws InterruptedException {
993	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
994		final Condition c = lock.writeLock().newCondition();
995	<	Thread t1 = new Thread(new Runnable() {
996	<	public void run() {
997	<	try {
998	<	lock.writeLock().lock();
999	<	c.await();
1000	<	lock.writeLock().unlock();
1001	<	}
1002	<	catch(InterruptedException e) {
1003	<	threadUnexpectedException();
1004	<	}
1005	<	}
1006	<	});
1007	<
1008	<	Thread t2 = new Thread(new Runnable() {
1009	<	public void run() {
1010	<	try {
1011	<	lock.writeLock().lock();
1012	<	c.await();
1013	<	lock.writeLock().unlock();
1014	<	}
1015	<	catch(InterruptedException e) {
1016	<	threadUnexpectedException();
1017	<	}
1018	<	}
1019	<	});
995	>	final CountDownLatch locked = new CountDownLatch(2);
996	>	final Lock writeLock = lock.writeLock();
997	>	Thread t1 = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() throws InterruptedException {
999	>	writeLock.lock();
1000	>	locked.countDown();
1001	>	c.await();
1002	>	writeLock.unlock();
1003	>	}});
1004	>
1005	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1006	>	public void realRun() throws InterruptedException {
1007	>	writeLock.lock();
1008	>	locked.countDown();
1009	>	c.await();
1010	>	writeLock.unlock();
1011	>	}});
1012	>
1013	>	locked.await();
1014	>	writeLock.lock();
1015	>	assertHasWaiters(lock, c, t1, t2);
1016	>	c.signalAll();
1017	>	assertHasNoWaiters(lock, c);
1018	>	writeLock.unlock();
1019	>	awaitTermination(t1);
1020	>	awaitTermination(t2);
1021	>	}
1022
1023	<	try {
1024	<	t1.start();
1025	<	t2.start();
1026	<	Thread.sleep(SHORT_DELAY_MS);
1027	<	lock.writeLock().lock();
1028	<	c.signalAll();
1029	<	lock.writeLock().unlock();
1030	<	t1.join(SHORT_DELAY_MS);
1031	<	t2.join(SHORT_DELAY_MS);
1032	<	assertFalse(t1.isAlive());
1033	<	assertFalse(t2.isAlive());
1034	<	}
1035	<	catch (Exception ex) {
1036	<	unexpectedException();
1037	<	}
1023	>	/**
1024	>	* signal wakes up waiting threads in FIFO order.
1025	>	*/
1026	>	public void testSignalWakesFifo() throws InterruptedException {
1027	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1028	>	final Condition c = lock.writeLock().newCondition();
1029	>	final CountDownLatch locked1 = new CountDownLatch(1);
1030	>	final CountDownLatch locked2 = new CountDownLatch(1);
1031	>	final Lock writeLock = lock.writeLock();
1032	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	writeLock.lock();
1035	>	locked1.countDown();
1036	>	c.await();
1037	>	writeLock.unlock();
1038	>	}});
1039	>
1040	>	locked1.await();
1041	>
1042	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1043	>	public void realRun() throws InterruptedException {
1044	>	writeLock.lock();
1045	>	locked2.countDown();
1046	>	c.await();
1047	>	writeLock.unlock();
1048	>	}});
1049	>
1050	>	locked2.await();
1051	>
1052	>	writeLock.lock();
1053	>	assertHasWaiters(lock, c, t1, t2);
1054	>	assertFalse(lock.hasQueuedThreads());
1055	>	c.signal();
1056	>	assertHasWaiters(lock, c, t2);
1057	>	assertTrue(lock.hasQueuedThread(t1));
1058	>	assertFalse(lock.hasQueuedThread(t2));
1059	>	c.signal();
1060	>	assertHasNoWaiters(lock, c);
1061	>	assertTrue(lock.hasQueuedThread(t1));
1062	>	assertTrue(lock.hasQueuedThread(t2));
1063	>	writeLock.unlock();
1064	>	awaitTermination(t1);
1065	>	awaitTermination(t2);
1066		}
1067
1068		/**
1069		* A serialized lock deserializes as unlocked
1070		*/
1071	<	public void testSerialization() {
1071	>	public void testSerialization() throws Exception {
1072		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1073		l.readLock().lock();
1074		l.readLock().unlock();
1075
1076	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1077	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1078	+	out.writeObject(l);
1079	+	out.close();
1080	+
1081	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1082	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1083	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1084	+	r.readLock().lock();
1085	+	r.readLock().unlock();
1086	+	}
1087	+
1088	+	/**
1089	+	* hasQueuedThreads reports whether there are waiting threads
1090	+	*/
1091	+	public void testhasQueuedThreads() throws InterruptedException {
1092	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1093	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1094	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1095	+	assertFalse(lock.hasQueuedThreads());
1096	+	lock.writeLock().lock();
1097	+	assertFalse(lock.hasQueuedThreads());
1098	+	long startTime = System.nanoTime();
1099	+	t1.start();
1100	+	waitForQueuedThread(lock, t1);
1101	+	t2.start();
1102	+	waitForQueuedThread(lock, t2);
1103	+	assertTrue(lock.hasQueuedThreads());
1104	+	t1.interrupt();
1105	+	awaitTermination(t1);
1106	+	assertTrue(lock.hasQueuedThreads());
1107	+	lock.writeLock().unlock();
1108	+	awaitTermination(t2);
1109	+	assertFalse(lock.hasQueuedThreads());
1110	+	}
1111	+
1112	+	/**
1113	+	* hasQueuedThread(null) throws NPE
1114	+	*/
1115	+	public void testHasQueuedThreadNPE() {
1116	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1117		try {
1118	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1119	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1120	<	out.writeObject(l);
1121	<	out.close();
1122	<
1123	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1124	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1125	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1126	<	r.readLock().lock();
1127	<	r.readLock().unlock();
1128	<	} catch(Exception e){
1129	<	e.printStackTrace();
1130	<	unexpectedException();
1131	<	}
1118	>	sync.hasQueuedThread(null);
1119	>	shouldThrow();
1120	>	} catch (NullPointerException success) {}
1121	>	}
1122	>
1123	>	/**
1124	>	* hasQueuedThread reports whether a thread is queued.
1125	>	*/
1126	>	public void testHasQueuedThread() throws InterruptedException {
1127	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1128	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1129	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1130	>	assertFalse(lock.hasQueuedThread(t1));
1131	>	assertFalse(lock.hasQueuedThread(t2));
1132	>	lock.writeLock().lock();
1133	>	long startTime = System.nanoTime();
1134	>	t1.start();
1135	>	waitForQueuedThread(lock, t1);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	t2.start();
1139	>	waitForQueuedThread(lock, t2);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	t1.interrupt();
1143	>	awaitTermination(t1);
1144	>	assertFalse(lock.hasQueuedThread(t1));
1145	>	assertTrue(lock.hasQueuedThread(t2));
1146	>	lock.writeLock().unlock();
1147	>	awaitTermination(t2);
1148	>	assertFalse(lock.hasQueuedThread(t1));
1149	>	assertFalse(lock.hasQueuedThread(t2));
1150		}
1151
1152		/**
1153		* getQueueLength reports number of waiting threads
1154		*/
1155	<	public void testGetQueueLength() {
1156	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1155	>	public void testGetQueueLength() throws InterruptedException {
1156	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1158		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1159	<	try {
1160	<	assertEquals(0, lock.getQueueLength());
1161	<	lock.writeLock().lock();
1162	<	t1.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1164	<	assertEquals(1, lock.getQueueLength());
1165	<	t2.start();
1166	<	Thread.sleep(SHORT_DELAY_MS);
1167	<	assertEquals(2, lock.getQueueLength());
1168	<	t1.interrupt();
1169	<	Thread.sleep(SHORT_DELAY_MS);
1170	<	assertEquals(1, lock.getQueueLength());
1171	<	lock.writeLock().unlock();
1172	<	Thread.sleep(SHORT_DELAY_MS);
1173	<	assertEquals(0, lock.getQueueLength());
1174	<	t1.join();
880	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1159	>	assertEquals(0, lock.getQueueLength());
1160	>	lock.writeLock().lock();
1161	>	long startTime = System.nanoTime();
1162	>	t1.start();
1163	>	waitForQueuedThread(lock, t1);
1164	>	assertEquals(1, lock.getQueueLength());
1165	>	t2.start();
1166	>	waitForQueuedThread(lock, t2);
1167	>	assertEquals(2, lock.getQueueLength());
1168	>	t1.interrupt();
1169	>	awaitTermination(t1);
1170	>	assertEquals(1, lock.getQueueLength());
1171	>	lock.writeLock().unlock();
1172	>	awaitTermination(t2);
1173	>	assertEquals(0, lock.getQueueLength());
1174	>	}
1175
1176		/**
1177		* getQueuedThreads includes waiting threads
1178		*/
1179	<	public void testGetQueuedThreads() {
1180	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1179	>	public void testGetQueuedThreads() throws InterruptedException {
1180	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1181		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1182		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1183	+	assertTrue(lock.getQueuedThreads().isEmpty());
1184	+	lock.writeLock().lock();
1185	+	long startTime = System.nanoTime();
1186	+	assertTrue(lock.getQueuedThreads().isEmpty());
1187	+	t1.start();
1188	+	waitForQueuedThread(lock, t1);
1189	+	assertEquals(1, lock.getQueuedThreads().size());
1190	+	assertTrue(lock.getQueuedThreads().contains(t1));
1191	+	t2.start();
1192	+	waitForQueuedThread(lock, t2);
1193	+	assertEquals(2, lock.getQueuedThreads().size());
1194	+	assertTrue(lock.getQueuedThreads().contains(t1));
1195	+	assertTrue(lock.getQueuedThreads().contains(t2));
1196	+	t1.interrupt();
1197	+	awaitTermination(t1);
1198	+	assertFalse(lock.getQueuedThreads().contains(t1));
1199	+	assertTrue(lock.getQueuedThreads().contains(t2));
1200	+	assertEquals(1, lock.getQueuedThreads().size());
1201	+	lock.writeLock().unlock();
1202	+	awaitTermination(t2);
1203	+	assertTrue(lock.getQueuedThreads().isEmpty());
1204	+	}
1205	+
1206	+	/**
1207	+	* hasWaiters throws NPE if null
1208	+	*/
1209	+	public void testHasWaitersNPE() {
1210	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1211		try {
1212	<	assertTrue(lock.getQueuedThreads().isEmpty());
1213	<	lock.writeLock().lock();
1214	<	assertTrue(lock.getQueuedThreads().isEmpty());
1215	<	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	<	}
1212	>	lock.hasWaiters(null);
1213	>	shouldThrow();
1214	>	} catch (NullPointerException success) {}
1215	>	}
1216
1217		/**
1218	<	* hasWaiters returns true when a thread is waiting, else false
1218	>	* getWaitQueueLength throws NPE if null
1219		*/
1220	<	public void testHasWaiters() {
1221	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1223	<	Thread t = new Thread(new Runnable() {
1224	<	public void run() {
1225	<	try {
1226	<	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	<	});
1220	>	public void testGetWaitQueueLengthNPE() {
1221	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	>	try {
1223	>	lock.getWaitQueueLength(null);
1224	>	shouldThrow();
1225	>	} catch (NullPointerException success) {}
1226	>	}
1227
1228	+	/**
1229	+	* getWaitingThreads throws NPE if null
1230	+	*/
1231	+	public void testGetWaitingThreadsNPE() {
1232	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1233		try {
1234	<	t.start();
1235	<	Thread.sleep(SHORT_DELAY_MS);
1236	<	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	<	}
1234	>	lock.getWaitingThreads(null);
1235	>	shouldThrow();
1236	>	} catch (NullPointerException success) {}
1237		}
1238
1239		/**
1240	<	* getWaitQueueLength returns number of waiting threads
1240	>	* hasWaiters throws IAE if not owned
1241		*/
1242	<	public void testGetWaitQueueLength() {
1243	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1245	<	Thread t1 = new Thread(new Runnable() {
1246	<	public void run() {
1247	<	try {
1248	<	lock.writeLock().lock();
1249	<	threadAssertFalse(c.hasWaiters());
1250	<	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	<	});
1242	>	public void testHasWaitersIAE() {
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244	>	final Condition c = lock.writeLock().newCondition();
1245	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1246	>	try {
1247	>	lock2.hasWaiters(c);
1248	>	shouldThrow();
1249	>	} catch (IllegalArgumentException success) {}
1250	>	}
1251
1252	+	/**
1253	+	* hasWaiters throws IMSE if not locked
1254	+	*/
1255	+	public void testHasWaitersIMSE() {
1256	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1257	+	final Condition c = lock.writeLock().newCondition();
1258		try {
1259	<	t1.start();
1260	<	Thread.sleep(SHORT_DELAY_MS);
1261	<	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	<	}
1259	>	lock.hasWaiters(c);
1260	>	shouldThrow();
1261	>	} catch (IllegalMonitorStateException success) {}
1262		}
1263
1264		/**
1265	<	* getWaitingThreads returns only and all waiting threads
1265	>	* getWaitQueueLength throws IAE if not owned
1266		*/
1267	<	public void testGetWaitingThreads() {
1268	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1269	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1270	<	Thread t1 = new Thread(new Runnable() {
1271	<	public void run() {
1272	<	try {
1273	<	lock.writeLock().lock();
1274	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1275	<	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	<	});
1267	>	public void testGetWaitQueueLengthIAE() {
1268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1269	>	final Condition c = lock.writeLock().newCondition();
1270	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1271	>	try {
1272	>	lock2.getWaitQueueLength(c);
1273	>	shouldThrow();
1274	>	} catch (IllegalArgumentException success) {}
1275	>	}
1276
1277	+	/**
1278	+	* getWaitQueueLength throws IMSE if not locked
1279	+	*/
1280	+	public void testGetWaitQueueLengthIMSE() {
1281	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1282	+	final Condition c = lock.writeLock().newCondition();
1283		try {
1284	<	lock.writeLock().lock();
1285	<	assertTrue(c.getWaitingThreads().isEmpty());
1286	<	lock.writeLock().unlock();
1287	<	t1.start();
1288	<	Thread.sleep(SHORT_DELAY_MS);
1289	<	t2.start();
1290	<	Thread.sleep(SHORT_DELAY_MS);
1291	<	lock.writeLock().lock();
1292	<	assertTrue(c.hasWaiters());
1293	<	assertTrue(c.getWaitingThreads().contains(t1));
1294	<	assertTrue(c.getWaitingThreads().contains(t2));
1295	<	c.signalAll();
1296	<	lock.writeLock().unlock();
1297	<	Thread.sleep(SHORT_DELAY_MS);
1298	<	lock.writeLock().lock();
1299	<	assertFalse(c.hasWaiters());
1300	<	assertTrue(c.getWaitingThreads().isEmpty());
1301	<	lock.writeLock().unlock();
1302	<	t1.join(SHORT_DELAY_MS);
1303	<	t2.join(SHORT_DELAY_MS);
1304	<	assertFalse(t1.isAlive());
1305	<	assertFalse(t2.isAlive());
1306	<	}
1307	<	catch (Exception ex) {
1308	<	unexpectedException();
1309	<	}
1284	>	lock.getWaitQueueLength(c);
1285	>	shouldThrow();
1286	>	} catch (IllegalMonitorStateException success) {}
1287	>	}
1288	>
1289	>	/**
1290	>	* getWaitingThreads throws IAE if not owned
1291	>	*/
1292	>	public void testGetWaitingThreadsIAE() {
1293	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1294	>	final Condition c = lock.writeLock().newCondition();
1295	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1296	>	try {
1297	>	lock2.getWaitingThreads(c);
1298	>	shouldThrow();
1299	>	} catch (IllegalArgumentException success) {}
1300	>	}
1301	>
1302	>	/**
1303	>	* getWaitingThreads throws IMSE if not locked
1304	>	*/
1305	>	public void testGetWaitingThreadsIMSE() {
1306	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307	>	final Condition c = lock.writeLock().newCondition();
1308	>	try {
1309	>	lock.getWaitingThreads(c);
1310	>	shouldThrow();
1311	>	} catch (IllegalMonitorStateException success) {}
1312	>	}
1313	>
1314	>	/**
1315	>	* hasWaiters returns true when a thread is waiting, else false
1316	>	*/
1317	>	public void testHasWaiters() throws InterruptedException {
1318	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1319	>	final Condition c = lock.writeLock().newCondition();
1320	>	final CountDownLatch locked = new CountDownLatch(1);
1321	>	Thread t = newStartedThread(new CheckedRunnable() {
1322	>	public void realRun() throws InterruptedException {
1323	>	lock.writeLock().lock();
1324	>	assertFalse(lock.hasWaiters(c));
1325	>	locked.countDown();
1326	>	assertEquals(0, lock.getWaitQueueLength(c));
1327	>	c.await();
1328	>	lock.writeLock().unlock();
1329	>	}});
1330	>
1331	>	locked.await();
1332	>	lock.writeLock().lock();
1333	>	assertTrue(lock.hasWaiters(c));
1334	>	assertEquals(1, lock.getWaitQueueLength(c));
1335	>	c.signal();
1336	>	assertHasNoWaiters(lock, c);
1337	>	lock.writeLock().unlock();
1338	>	awaitTermination(t);
1339	>	assertHasNoWaiters(lock, c);
1340	>	}
1341	>
1342	>	/**
1343	>	* getWaitQueueLength returns number of waiting threads
1344	>	*/
1345	>	public void testGetWaitQueueLength() throws InterruptedException {
1346	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1347	>	final Condition c = lock.writeLock().newCondition();
1348	>	final CountDownLatch locked = new CountDownLatch(1);
1349	>	Thread t = newStartedThread(new CheckedRunnable() {
1350	>	public void realRun() throws InterruptedException {
1351	>	lock.writeLock().lock();
1352	>	assertEquals(0, lock.getWaitQueueLength(c));
1353	>	locked.countDown();
1354	>	c.await();
1355	>	lock.writeLock().unlock();
1356	>	}});
1357	>
1358	>	locked.await();
1359	>	lock.writeLock().lock();
1360	>	assertHasWaiters(lock, c, t);
1361	>	assertEquals(1, lock.getWaitQueueLength(c));
1362	>	c.signal();
1363	>	assertHasNoWaiters(lock, c);
1364	>	assertEquals(0, lock.getWaitQueueLength(c));
1365	>	lock.writeLock().unlock();
1366	>	awaitTermination(t);
1367	>	}
1368	>
1369	>	/**
1370	>	* getWaitingThreads returns only and all waiting threads
1371	>	*/
1372	>	public void testGetWaitingThreads() throws InterruptedException {
1373	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1374	>	final Condition c = lock.writeLock().newCondition();
1375	>	final CountDownLatch locked1 = new CountDownLatch(1);
1376	>	final CountDownLatch locked2 = new CountDownLatch(1);
1377	>	Thread t1 = new Thread(new CheckedRunnable() {
1378	>	public void realRun() throws InterruptedException {
1379	>	lock.writeLock().lock();
1380	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1381	>	locked1.countDown();
1382	>	c.await();
1383	>	lock.writeLock().unlock();
1384	>	}});
1385	>
1386	>	Thread t2 = new Thread(new CheckedRunnable() {
1387	>	public void realRun() throws InterruptedException {
1388	>	lock.writeLock().lock();
1389	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1390	>	locked2.countDown();
1391	>	c.await();
1392	>	lock.writeLock().unlock();
1393	>	}});
1394	>
1395	>	lock.writeLock().lock();
1396	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1397	>	lock.writeLock().unlock();
1398	>
1399	>	t1.start();
1400	>	locked1.await();
1401	>	t2.start();
1402	>	locked2.await();
1403	>
1404	>	lock.writeLock().lock();
1405	>	assertTrue(lock.hasWaiters(c));
1406	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1407	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1408	>	assertEquals(2, lock.getWaitingThreads(c).size());
1409	>	c.signalAll();
1410	>	assertHasNoWaiters(lock, c);
1411	>	lock.writeLock().unlock();
1412	>
1413	>	awaitTermination(t1);
1414	>	awaitTermination(t2);
1415	>
1416	>	assertHasNoWaiters(lock, c);
1417	>	}
1418	>
1419	>	/**
1420	>	* toString indicates current lock state
1421	>	*/
1422	>	public void testToString() {
1423	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1424	>	String us = lock.toString();
1425	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1426	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1427	>	lock.writeLock().lock();
1428	>	String ws = lock.toString();
1429	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1430	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1431	>	lock.writeLock().unlock();
1432	>	lock.readLock().lock();
1433	>	lock.readLock().lock();
1434	>	String rs = lock.toString();
1435	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1436	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1437	>	}
1438	>
1439	>	/**
1440	>	* readLock.toString indicates current lock state
1441	>	*/
1442	>	public void testReadLockToString() {
1443	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1444	>	String us = lock.readLock().toString();
1445	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1446	>	lock.readLock().lock();
1447	>	lock.readLock().lock();
1448	>	String rs = lock.readLock().toString();
1449	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1450	>	}
1451	>
1452	>	/**
1453	>	* writeLock.toString indicates current lock state
1454	>	*/
1455	>	public void testWriteLockToString() {
1456	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1457	>	String us = lock.writeLock().toString();
1458	>	assertTrue(us.indexOf("Unlocked") >= 0);
1459	>	lock.writeLock().lock();
1460	>	String ls = lock.writeLock().toString();
1461	>	assertTrue(ls.indexOf("Locked") >= 0);
1462		}
1463
1464		}

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