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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.31 by jsr166, Tue Nov 17 13:40:14 2009 UTC vs.
Revision 1.63 by jsr166, Sat May 21 06:24:33 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch (InterruptedException success) {}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch (InterruptedException success) {}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	+	public Thread getOwner() {
55	+	return super.getOwner();
56	+	}
57		public Collection<Thread> getQueuedThreads() {
58		return super.getQueuedThreads();
59		}
#	Line 63 | Line 63 | public class ReentrantReadWriteLockTest
63		}
64
65		/**
66	<	* Constructor sets given fairness, and is in unlocked state
66	>	* Releases write lock, checking that it had a hold count of 1.
67		*/
68	<	public void testConstructor() {
69	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
70	<	assertFalse(rl.isFair());
71	<	assertFalse(rl.isWriteLocked());
72	<	assertEquals(0, rl.getReadLockCount());
73	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	<	assertTrue(r2.isFair());
75	<	assertFalse(r2.isWriteLocked());
76	<	assertEquals(0, r2.getReadLockCount());
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedByMoi(lock);
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* write-locking and read-locking an unlocked lock succeed
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<	public void testLock() {
80	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	<	rl.writeLock().lock();
82	<	assertTrue(rl.isWriteLocked());
83	<	assertTrue(rl.isWriteLockedByCurrentThread());
84	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
85	<	assertEquals(0, rl.getReadLockCount());
86	<	rl.writeLock().unlock();
87	<	assertFalse(rl.isWriteLocked());
91	<	assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	<	assertEquals(0, rl.getReadLockCount());
94	<	rl.readLock().lock();
95	<	assertFalse(rl.isWriteLocked());
96	<	assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLockCount());
98	<	rl.readLock().unlock();
99	<	assertFalse(rl.isWriteLocked());
100	<	assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLockCount());
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new AssertionFailedError("timed out");
84	>	Thread.yield();
85	>	}
86	>	assertTrue(t.isAlive());
87	>	assertTrue(lock.getOwner() != t);
88		}
89
104	–
90		/**
91	<	* locking an unlocked fair lock succeeds
92	<	*/
93	<	public void testFairLock() {
94	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
95	<	rl.writeLock().lock();
96	<	assertTrue(rl.isWriteLocked());
97	<	assertTrue(rl.isWriteLockedByCurrentThread());
98	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
99	<	assertEquals(0, rl.getReadLockCount());
115	<	rl.writeLock().unlock();
116	<	assertFalse(rl.isWriteLocked());
117	<	assertFalse(rl.isWriteLockedByCurrentThread());
118	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
119	<	assertEquals(0, rl.getReadLockCount());
120	<	rl.readLock().lock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(1, rl.getReadLockCount());
124	<	rl.readLock().unlock();
125	<	assertFalse(rl.isWriteLocked());
126	<	assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(0, rl.getReadLockCount());
91	>	* Checks that lock is not write-locked.
92	>	*/
93	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	>	assertFalse(lock.isWriteLocked());
95	>	assertFalse(lock.isWriteLockedByCurrentThread());
96	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	>	assertEquals(0, lock.getWriteHoldCount());
98	>	assertEquals(0, lock.writeLock().getHoldCount());
99	>	assertNull(lock.getOwner());
100		}
101
102		/**
103	<	* getWriteHoldCount returns number of recursive holds
103	>	* Checks that lock is write-locked by the given thread.
104		*/
105	<	public void testGetWriteHoldCount() {
106	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
107	<	for (int i = 1; i <= SIZE; i++) {
108	<	lock.writeLock().lock();
109	<	assertEquals(i,lock.getWriteHoldCount());
110	<	}
111	<	for (int i = SIZE; i > 0; i--) {
112	<	lock.writeLock().unlock();
113	<	assertEquals(i-1,lock.getWriteHoldCount());
114	<	}
105	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
106	>	assertTrue(lock.isWriteLocked());
107	>	assertSame(t, lock.getOwner());
108	>	assertEquals(t == Thread.currentThread(),
109	>	lock.isWriteLockedByCurrentThread());
110	>	assertEquals(t == Thread.currentThread(),
111	>	lock.writeLock().isHeldByCurrentThread());
112	>	assertEquals(t == Thread.currentThread(),
113	>	lock.getWriteHoldCount() > 0);
114	>	assertEquals(t == Thread.currentThread(),
115	>	lock.writeLock().getHoldCount() > 0);
116	>	assertEquals(0, lock.getReadLockCount());
117		}
118
119		/**
120	<	* WriteLock.getHoldCount returns number of recursive holds
121	<	*/
122	<	public void testGetHoldCount() {
123	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	for (int i = 1; i <= SIZE; i++) {
151	<	lock.writeLock().lock();
152	<	assertEquals(i,lock.writeLock().getHoldCount());
153	<	}
154	<	for (int i = SIZE; i > 0; i--) {
155	<	lock.writeLock().unlock();
156	<	assertEquals(i-1,lock.writeLock().getHoldCount());
157	<	}
120	>	* Checks that lock is write-locked by the current thread.
121	>	*/
122	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
123	>	assertWriteLockedBy(lock, Thread.currentThread());
124		}
125
126		/**
127	<	* getReadHoldCount returns number of recursive holds
127	>	* Checks that condition c has no waiters.
128		*/
129	<	public void testGetReadHoldCount() {
130	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	for (int i = 1; i <= SIZE; i++) {
166	<	lock.readLock().lock();
167	<	assertEquals(i,lock.getReadHoldCount());
168	<	}
169	<	for (int i = SIZE; i > 0; i--) {
170	<	lock.readLock().unlock();
171	<	assertEquals(i-1,lock.getReadHoldCount());
172	<	}
129	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131		}
132
175	–
133		/**
134	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
134	>	* Checks that condition c has exactly the given waiter threads.
135		*/
136	<	public void testUnlock_IllegalMonitorStateException() {
137	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
138	<	try {
139	<	rl.writeLock().unlock();
140	<	shouldThrow();
141	<	} catch (IllegalMonitorStateException success) {}
136	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
137	>	Thread... threads) {
138	>	lock.writeLock().lock();
139	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
140	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
141	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
142	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
143	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
144	>	new HashSet<Thread>(Arrays.asList(threads)));
145	>	lock.writeLock().unlock();
146		}
147
148	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
149
150		/**
151	<	* write-lockInterruptibly is interruptible
151	>	* Awaits condition using the specified AwaitMethod.
152		*/
153	<	public void testWriteLockInterruptibly_Interrupted() {
154	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
155	<	Thread t = new Thread(new Runnable() {
156	<	public void run() {
157	<	try {
158	<	lock.writeLock().lockInterruptibly();
159	<	lock.writeLock().unlock();
160	<	lock.writeLock().lockInterruptibly();
161	<	lock.writeLock().unlock();
162	<	} catch (InterruptedException success) {}
163	<	}
164	<	});
165	<	try {
166	<	lock.writeLock().lock();
167	<	t.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	t.interrupt();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	lock.writeLock().unlock();
210	<	t.join();
211	<	} catch (Exception e) {
212	<	unexpectedException();
153	>	void await(Condition c, AwaitMethod awaitMethod)
154	>	throws InterruptedException {
155	>	switch (awaitMethod) {
156	>	case await:
157	>	c.await();
158	>	break;
159	>	case awaitTimed:
160	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
161	>	break;
162	>	case awaitNanos:
163	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
164	>	assertTrue(nanosRemaining > 0);
165	>	break;
166	>	case awaitUntil:
167	>	java.util.Date d = new java.util.Date();
168	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
169	>	break;
170		}
171		}
172
173		/**
174	<	* timed write-tryLock is interruptible
174	>	* Constructor sets given fairness, and is in unlocked state
175		*/
176	<	public void testWriteTryLock_Interrupted() {
177	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
178	<	lock.writeLock().lock();
179	<	Thread t = new Thread(new Runnable() {
180	<	public void run() {
181	<	try {
182	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
183	<	} catch (InterruptedException success) {}
184	<	}
185	<	});
186	<	try {
187	<	t.start();
188	<	t.interrupt();
189	<	lock.writeLock().unlock();
190	<	t.join();
191	<	} catch (Exception e) {
192	<	unexpectedException();
236	<	}
176	>	public void testConstructor() {
177	>	PublicReentrantReadWriteLock lock;
178	>
179	>	lock = new PublicReentrantReadWriteLock();
180	>	assertFalse(lock.isFair());
181	>	assertNotWriteLocked(lock);
182	>	assertEquals(0, lock.getReadLockCount());
183	>
184	>	lock = new PublicReentrantReadWriteLock(true);
185	>	assertTrue(lock.isFair());
186	>	assertNotWriteLocked(lock);
187	>	assertEquals(0, lock.getReadLockCount());
188	>
189	>	lock = new PublicReentrantReadWriteLock(false);
190	>	assertFalse(lock.isFair());
191	>	assertNotWriteLocked(lock);
192	>	assertEquals(0, lock.getReadLockCount());
193		}
194
195		/**
196	<	* read-lockInterruptibly is interruptible
196	>	* write-locking and read-locking an unlocked lock succeed
197		*/
198	<	public void testReadLockInterruptibly_Interrupted() {
199	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
200	<	lock.writeLock().lock();
201	<	Thread t = new Thread(new Runnable() {
202	<	public void run() {
203	<	try {
204	<	lock.readLock().lockInterruptibly();
205	<	} catch (InterruptedException success) {}
206	<	}
207	<	});
208	<	try {
209	<	t.start();
210	<	Thread.sleep(SHORT_DELAY_MS);
211	<	t.interrupt();
212	<	Thread.sleep(SHORT_DELAY_MS);
198	>	public void testLock()      { testLock(false); }
199	>	public void testLock_fair() { testLock(true); }
200	>	public void testLock(boolean fair) {
201	>	PublicReentrantReadWriteLock lock =
202	>	new PublicReentrantReadWriteLock(fair);
203	>	assertNotWriteLocked(lock);
204	>	lock.writeLock().lock();
205	>	assertWriteLockedByMoi(lock);
206	>	lock.writeLock().unlock();
207	>	assertNotWriteLocked(lock);
208	>	assertEquals(0, lock.getReadLockCount());
209	>	lock.readLock().lock();
210	>	assertNotWriteLocked(lock);
211	>	assertEquals(1, lock.getReadLockCount());
212	>	lock.readLock().unlock();
213	>	assertNotWriteLocked(lock);
214	>	assertEquals(0, lock.getReadLockCount());
215	>	}
216	>
217	>	/**
218	>	* getWriteHoldCount returns number of recursive holds
219	>	*/
220	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
221	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
222	>	public void testGetWriteHoldCount(boolean fair) {
223	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
224	>	for (int i = 1; i <= SIZE; i++) {
225	>	lock.writeLock().lock();
226	>	assertEquals(i,lock.getWriteHoldCount());
227	>	}
228	>	for (int i = SIZE; i > 0; i--) {
229		lock.writeLock().unlock();
230	<	t.join();
259	<	} catch (Exception e) {
260	<	unexpectedException();
230	>	assertEquals(i-1,lock.getWriteHoldCount());
231		}
232		}
233
234		/**
235	<	* timed read-tryLock is interruptible
235	>	* writelock.getHoldCount returns number of recursive holds
236		*/
237	<	public void testReadTryLock_Interrupted() {
238	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
239	<	lock.writeLock().lock();
240	<	Thread t = new Thread(new Runnable() {
241	<	public void run() {
242	<	try {
243	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
244	<	threadShouldThrow();
245	<	} catch (InterruptedException success) {}
246	<	}
247	<	});
278	<	try {
279	<	t.start();
280	<	t.interrupt();
281	<	t.join();
282	<	} catch (Exception e) {
283	<	unexpectedException();
237	>	public void testGetHoldCount()      { testGetHoldCount(false); }
238	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
239	>	public void testGetHoldCount(boolean fair) {
240	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
241	>	for (int i = 1; i <= SIZE; i++) {
242	>	lock.writeLock().lock();
243	>	assertEquals(i,lock.writeLock().getHoldCount());
244	>	}
245	>	for (int i = SIZE; i > 0; i--) {
246	>	lock.writeLock().unlock();
247	>	assertEquals(i-1,lock.writeLock().getHoldCount());
248		}
249		}
250
287	–
251		/**
252	<	* write-tryLock fails if locked
252	>	* getReadHoldCount returns number of recursive holds
253		*/
254	<	public void testWriteTryLockWhenLocked() {
255	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
256	<	lock.writeLock().lock();
257	<	Thread t = new Thread(new Runnable() {
258	<	public void run() {
259	<	threadAssertFalse(lock.writeLock().tryLock());
260	<	}
261	<	});
262	<	try {
263	<	t.start();
264	<	t.join();
302	<	lock.writeLock().unlock();
303	<	} catch (Exception e) {
304	<	unexpectedException();
254	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
255	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
256	>	public void testGetReadHoldCount(boolean fair) {
257	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
258	>	for (int i = 1; i <= SIZE; i++) {
259	>	lock.readLock().lock();
260	>	assertEquals(i,lock.getReadHoldCount());
261	>	}
262	>	for (int i = SIZE; i > 0; i--) {
263	>	lock.readLock().unlock();
264	>	assertEquals(i-1,lock.getReadHoldCount());
265		}
266		}
267
268		/**
269	<	* read-tryLock fails if locked
269	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
270		*/
271	<	public void testReadTryLockWhenLocked() {
272	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
273	<	lock.writeLock().lock();
274	<	Thread t = new Thread(new Runnable() {
315	<	public void run() {
316	<	threadAssertFalse(lock.readLock().tryLock());
317	<	}
318	<	});
271	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
272	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
273	>	public void testWriteUnlock_IMSE(boolean fair) {
274	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
275		try {
320	–	t.start();
321	–	t.join();
276		lock.writeLock().unlock();
277	<	} catch (Exception e) {
278	<	unexpectedException();
325	<	}
277	>	shouldThrow();
278	>	} catch (IllegalMonitorStateException success) {}
279		}
280
281		/**
282	<	* Multiple threads can hold a read lock when not write-locked
282	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
283		*/
284	<	public void testMultipleReadLocks() {
285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	<	lock.readLock().lock();
287	<	Thread t = new Thread(new Runnable() {
335	<	public void run() {
336	<	threadAssertTrue(lock.readLock().tryLock());
337	<	lock.readLock().unlock();
338	<	}
339	<	});
284	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
285	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
286	>	public void testReadUnlock_IMSE(boolean fair) {
287	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
288		try {
341	–	t.start();
342	–	t.join();
289		lock.readLock().unlock();
290	<	} catch (Exception e) {
291	<	unexpectedException();
346	<	}
290	>	shouldThrow();
291	>	} catch (IllegalMonitorStateException success) {}
292		}
293
294		/**
295	<	* A writelock succeeds after reading threads unlock
295	>	* write-lockInterruptibly is interruptible
296		*/
297	<	public void testWriteAfterMultipleReadLocks() {
298	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
299	<	lock.readLock().lock();
300	<	Thread t1 = new Thread(new Runnable() {
301	<	public void run() {
302	<	lock.readLock().lock();
303	<	lock.readLock().unlock();
304	<	}
305	<	});
306	<	Thread t2 = new Thread(new Runnable() {
362	<	public void run() {
363	<	lock.writeLock().lock();
364	<	lock.writeLock().unlock();
365	<	}
366	<	});
367	<
368	<	try {
369	<	t1.start();
370	<	t2.start();
371	<	Thread.sleep(SHORT_DELAY_MS);
372	<	lock.readLock().unlock();
373	<	t1.join(MEDIUM_DELAY_MS);
374	<	t2.join(MEDIUM_DELAY_MS);
375	<	assertTrue(!t1.isAlive());
376	<	assertTrue(!t2.isAlive());
297	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
298	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
299	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
300	>	final PublicReentrantReadWriteLock lock =
301	>	new PublicReentrantReadWriteLock(fair);
302	>	lock.writeLock().lock();
303	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
304	>	public void realRun() throws InterruptedException {
305	>	lock.writeLock().lockInterruptibly();
306	>	}});
307
308	<	} catch (Exception e) {
309	<	unexpectedException();
310	<	}
308	>	waitForQueuedThread(lock, t);
309	>	t.interrupt();
310	>	awaitTermination(t);
311	>	releaseWriteLock(lock);
312		}
313
314		/**
315	<	* Readlocks succeed after a writing thread unlocks
315	>	* timed write-tryLock is interruptible
316		*/
317	<	public void testReadAfterWriteLock() {
318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
319	<	lock.writeLock().lock();
320	<	Thread t1 = new Thread(new Runnable() {
321	<	public void run() {
322	<	lock.readLock().lock();
323	<	lock.readLock().unlock();
324	<	}
325	<	});
326	<	Thread t2 = new Thread(new Runnable() {
327	<	public void run() {
328	<	lock.readLock().lock();
329	<	lock.readLock().unlock();
330	<	}
331	<	});
332	<
402	<	try {
403	<	t1.start();
404	<	t2.start();
405	<	Thread.sleep(SHORT_DELAY_MS);
406	<	lock.writeLock().unlock();
407	<	t1.join(MEDIUM_DELAY_MS);
408	<	t2.join(MEDIUM_DELAY_MS);
409	<	assertTrue(!t1.isAlive());
410	<	assertTrue(!t2.isAlive());
317	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
318	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
319	>	public void testWriteTryLock_Interruptible(boolean fair) {
320	>	final PublicReentrantReadWriteLock lock =
321	>	new PublicReentrantReadWriteLock(fair);
322	>	lock.writeLock().lock();
323	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
324	>	public void realRun() throws InterruptedException {
325	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
326	>	}});
327	>
328	>	waitForQueuedThread(lock, t);
329	>	t.interrupt();
330	>	awaitTermination(t);
331	>	releaseWriteLock(lock);
332	>	}
333
334	<	} catch (Exception e) {
335	<	unexpectedException();
336	<	}
334	>	/**
335	>	* read-lockInterruptibly is interruptible
336	>	*/
337	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
338	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
339	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
340	>	final PublicReentrantReadWriteLock lock =
341	>	new PublicReentrantReadWriteLock(fair);
342	>	lock.writeLock().lock();
343	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
344	>	public void realRun() throws InterruptedException {
345	>	lock.readLock().lockInterruptibly();
346	>	}});
347	>
348	>	waitForQueuedThread(lock, t);
349	>	t.interrupt();
350	>	awaitTermination(t);
351	>	releaseWriteLock(lock);
352		}
353
354		/**
355	<	* Read trylock succeeds if write locked by current thread
355	>	* timed read-tryLock is interruptible
356		*/
357	<	public void testReadHoldingWriteLock() {
358	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
359	<	lock.writeLock().lock();
360	<	assertTrue(lock.readLock().tryLock());
361	<	lock.readLock().unlock();
357	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
358	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
359	>	public void testReadTryLock_Interruptible(boolean fair) {
360	>	final PublicReentrantReadWriteLock lock =
361	>	new PublicReentrantReadWriteLock(fair);
362	>	lock.writeLock().lock();
363	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
364	>	public void realRun() throws InterruptedException {
365	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
366	>	}});
367	>
368	>	waitForQueuedThread(lock, t);
369	>	t.interrupt();
370	>	awaitTermination(t);
371	>	releaseWriteLock(lock);
372	>	}
373	>
374	>	/**
375	>	* write-tryLock on an unlocked lock succeeds
376	>	*/
377	>	public void testWriteTryLock()      { testWriteTryLock(false); }
378	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
379	>	public void testWriteTryLock(boolean fair) {
380	>	final PublicReentrantReadWriteLock lock =
381	>	new PublicReentrantReadWriteLock(fair);
382	>	assertTrue(lock.writeLock().tryLock());
383	>	assertWriteLockedByMoi(lock);
384	>	assertTrue(lock.writeLock().tryLock());
385	>	assertWriteLockedByMoi(lock);
386		lock.writeLock().unlock();
387	+	releaseWriteLock(lock);
388		}
389
390		/**
391	<	* Read lock succeeds if write locked by current thread even if
430	<	* other threads are waiting for readlock
391	>	* write-tryLock fails if locked
392		*/
393	<	public void testReadHoldingWriteLock2() {
394	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
395	<	lock.writeLock().lock();
396	<	Thread t1 = new Thread(new Runnable() {
397	<	public void run() {
398	<	lock.readLock().lock();
399	<	lock.readLock().unlock();
400	<	}
401	<	});
402	<	Thread t2 = new Thread(new Runnable() {
442	<	public void run() {
443	<	lock.readLock().lock();
444	<	lock.readLock().unlock();
445	<	}
446	<	});
393	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
394	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
395	>	public void testWriteTryLockWhenLocked(boolean fair) {
396	>	final PublicReentrantReadWriteLock lock =
397	>	new PublicReentrantReadWriteLock(fair);
398	>	lock.writeLock().lock();
399	>	Thread t = newStartedThread(new CheckedRunnable() {
400	>	public void realRun() {
401	>	assertFalse(lock.writeLock().tryLock());
402	>	}});
403
404	<	try {
405	<	t1.start();
406	<	t2.start();
451	<	lock.readLock().lock();
452	<	lock.readLock().unlock();
453	<	Thread.sleep(SHORT_DELAY_MS);
454	<	lock.readLock().lock();
455	<	lock.readLock().unlock();
456	<	lock.writeLock().unlock();
457	<	t1.join(MEDIUM_DELAY_MS);
458	<	t2.join(MEDIUM_DELAY_MS);
459	<	assertTrue(!t1.isAlive());
460	<	assertTrue(!t2.isAlive());
404	>	awaitTermination(t);
405	>	releaseWriteLock(lock);
406	>	}
407
408	<	} catch (Exception e) {
409	<	unexpectedException();
410	<	}
408	>	/**
409	>	* read-tryLock fails if locked
410	>	*/
411	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
412	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
413	>	public void testReadTryLockWhenLocked(boolean fair) {
414	>	final PublicReentrantReadWriteLock lock =
415	>	new PublicReentrantReadWriteLock(fair);
416	>	lock.writeLock().lock();
417	>	Thread t = newStartedThread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	assertFalse(lock.readLock().tryLock());
420	>	}});
421	>
422	>	awaitTermination(t);
423	>	releaseWriteLock(lock);
424		}
425
426		/**
427	<	*  Read lock succeeds if write locked by current thread even if
469	<	* other threads are waiting for writelock
427	>	* Multiple threads can hold a read lock when not write-locked
428		*/
429	<	public void testReadHoldingWriteLock3() {
430	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
431	<	lock.writeLock().lock();
432	<	Thread t1 = new Thread(new Runnable() {
433	<	public void run() {
434	<	lock.writeLock().lock();
435	<	lock.writeLock().unlock();
436	<	}
437	<	});
438	<	Thread t2 = new Thread(new Runnable() {
439	<	public void run() {
440	<	lock.writeLock().lock();
441	<	lock.writeLock().unlock();
442	<	}
485	<	});
429	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
430	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
431	>	public void testMultipleReadLocks(boolean fair) {
432	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
433	>	lock.readLock().lock();
434	>	Thread t = newStartedThread(new CheckedRunnable() {
435	>	public void realRun() throws InterruptedException {
436	>	assertTrue(lock.readLock().tryLock());
437	>	lock.readLock().unlock();
438	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
439	>	lock.readLock().unlock();
440	>	lock.readLock().lock();
441	>	lock.readLock().unlock();
442	>	}});
443
444	<	try {
445	<	t1.start();
446	<	t2.start();
490	<	lock.readLock().lock();
491	<	lock.readLock().unlock();
492	<	Thread.sleep(SHORT_DELAY_MS);
493	<	lock.readLock().lock();
494	<	lock.readLock().unlock();
495	<	lock.writeLock().unlock();
496	<	t1.join(MEDIUM_DELAY_MS);
497	<	t2.join(MEDIUM_DELAY_MS);
498	<	assertTrue(!t1.isAlive());
499	<	assertTrue(!t2.isAlive());
444	>	awaitTermination(t);
445	>	lock.readLock().unlock();
446	>	}
447
448	<	} catch (Exception e) {
449	<	unexpectedException();
450	<	}
448	>	/**
449	>	* A writelock succeeds only after a reading thread unlocks
450	>	*/
451	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
452	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
453	>	public void testWriteAfterReadLock(boolean fair) {
454	>	final PublicReentrantReadWriteLock lock =
455	>	new PublicReentrantReadWriteLock(fair);
456	>	lock.readLock().lock();
457	>	Thread t = newStartedThread(new CheckedRunnable() {
458	>	public void realRun() {
459	>	assertEquals(1, lock.getReadLockCount());
460	>	lock.writeLock().lock();
461	>	assertEquals(0, lock.getReadLockCount());
462	>	lock.writeLock().unlock();
463	>	}});
464	>	waitForQueuedThread(lock, t);
465	>	assertNotWriteLocked(lock);
466	>	assertEquals(1, lock.getReadLockCount());
467	>	lock.readLock().unlock();
468	>	assertEquals(0, lock.getReadLockCount());
469	>	awaitTermination(t);
470	>	assertNotWriteLocked(lock);
471		}
472
473	+	/**
474	+	* A writelock succeeds only after reading threads unlock
475	+	*/
476	+	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
477	+	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
478	+	public void testWriteAfterMultipleReadLocks(boolean fair) {
479	+	final PublicReentrantReadWriteLock lock =
480	+	new PublicReentrantReadWriteLock(fair);
481	+	lock.readLock().lock();
482	+	lock.readLock().lock();
483	+	Thread t1 = newStartedThread(new CheckedRunnable() {
484	+	public void realRun() {
485	+	lock.readLock().lock();
486	+	assertEquals(3, lock.getReadLockCount());
487	+	lock.readLock().unlock();
488	+	}});
489	+	awaitTermination(t1);
490	+
491	+	Thread t2 = newStartedThread(new CheckedRunnable() {
492	+	public void realRun() {
493	+	assertEquals(2, lock.getReadLockCount());
494	+	lock.writeLock().lock();
495	+	assertEquals(0, lock.getReadLockCount());
496	+	lock.writeLock().unlock();
497	+	}});
498	+	waitForQueuedThread(lock, t2);
499	+	assertNotWriteLocked(lock);
500	+	assertEquals(2, lock.getReadLockCount());
501	+	lock.readLock().unlock();
502	+	lock.readLock().unlock();
503	+	assertEquals(0, lock.getReadLockCount());
504	+	awaitTermination(t2);
505	+	assertNotWriteLocked(lock);
506	+	}
507
508		/**
509	<	*  Write lock succeeds if write locked by current thread even if
510	<	* other threads are waiting for writelock
509	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
510	>	* will block if there is a waiting writer thread.
511		*/
512	<	public void testWriteHoldingWriteLock4() {
513	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
514	<	lock.writeLock().lock();
515	<	Thread t1 = new Thread(new Runnable() {
515	<	public void run() {
516	<	lock.writeLock().lock();
517	<	lock.writeLock().unlock();
518	<	}
519	<	});
520	<	Thread t2 = new Thread(new Runnable() {
521	<	public void run() {
522	<	lock.writeLock().lock();
523	<	lock.writeLock().unlock();
524	<	}
525	<	});
512	>	public void testReaderWriterReaderFairFifo() {
513	>	final PublicReentrantReadWriteLock lock =
514	>	new PublicReentrantReadWriteLock(true);
515	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
516
517	<	try {
518	<	t1.start();
519	<	t2.start();
520	<	lock.writeLock().lock();
521	<	lock.writeLock().unlock();
522	<	Thread.sleep(SHORT_DELAY_MS);
523	<	lock.writeLock().lock();
524	<	lock.writeLock().unlock();
525	<	lock.writeLock().unlock();
526	<	t1.join(MEDIUM_DELAY_MS);
537	<	t2.join(MEDIUM_DELAY_MS);
538	<	assertTrue(!t1.isAlive());
539	<	assertTrue(!t2.isAlive());
517	>	lock.readLock().lock();
518	>	Thread t1 = newStartedThread(new CheckedRunnable() {
519	>	public void realRun() {
520	>	assertEquals(1, lock.getReadLockCount());
521	>	lock.writeLock().lock();
522	>	assertEquals(0, lock.getReadLockCount());
523	>	t1GotLock.set(true);
524	>	lock.writeLock().unlock();
525	>	}});
526	>	waitForQueuedThread(lock, t1);
527
528	<	} catch (Exception e) {
529	<	unexpectedException();
530	<	}
528	>	Thread t2 = newStartedThread(new CheckedRunnable() {
529	>	public void realRun() {
530	>	assertEquals(1, lock.getReadLockCount());
531	>	lock.readLock().lock();
532	>	assertEquals(1, lock.getReadLockCount());
533	>	assertTrue(t1GotLock.get());
534	>	lock.readLock().unlock();
535	>	}});
536	>	waitForQueuedThread(lock, t2);
537	>	assertTrue(t1.isAlive());
538	>	assertNotWriteLocked(lock);
539	>	assertEquals(1, lock.getReadLockCount());
540	>	lock.readLock().unlock();
541	>	awaitTermination(t1);
542	>	awaitTermination(t2);
543	>	assertNotWriteLocked(lock);
544		}
545
546	+	/**
547	+	* Readlocks succeed only after a writing thread unlocks
548	+	*/
549	+	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
550	+	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
551	+	public void testReadAfterWriteLock(boolean fair) {
552	+	final PublicReentrantReadWriteLock lock =
553	+	new PublicReentrantReadWriteLock(fair);
554	+	lock.writeLock().lock();
555	+	Thread t1 = newStartedThread(new CheckedRunnable() {
556	+	public void realRun() {
557	+	lock.readLock().lock();
558	+	lock.readLock().unlock();
559	+	}});
560	+	Thread t2 = newStartedThread(new CheckedRunnable() {
561	+	public void realRun() {
562	+	lock.readLock().lock();
563	+	lock.readLock().unlock();
564	+	}});
565	+
566	+	waitForQueuedThread(lock, t1);
567	+	waitForQueuedThread(lock, t2);
568	+	releaseWriteLock(lock);
569	+	awaitTermination(t1);
570	+	awaitTermination(t2);
571	+	}
572
573		/**
574	<	* Fair Read trylock succeeds if write locked by current thread
574	>	* Read trylock succeeds if write locked by current thread
575		*/
576	<	public void testReadHoldingWriteLockFair() {
577	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
578	<	lock.writeLock().lock();
576	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
577	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
578	>	public void testReadHoldingWriteLock(boolean fair) {
579	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
580	>	lock.writeLock().lock();
581		assertTrue(lock.readLock().tryLock());
582		lock.readLock().unlock();
583		lock.writeLock().unlock();
584		}
585
586		/**
587	<	* Fair Read lock succeeds if write locked by current thread even if
560	<	* other threads are waiting for readlock
587	>	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
588		*/
589	<	public void testReadHoldingWriteLockFair2() {
590	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
591	<	lock.writeLock().lock();
592	<	Thread t1 = new Thread(new Runnable() {
593	<	public void run() {
594	<	lock.readLock().lock();
568	<	lock.readLock().unlock();
569	<	}
570	<	});
571	<	Thread t2 = new Thread(new Runnable() {
572	<	public void run() {
573	<	lock.readLock().lock();
574	<	lock.readLock().unlock();
575	<	}
576	<	});
589	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
590	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
591	>	public void testReadTryLockBarging(boolean fair) {
592	>	final PublicReentrantReadWriteLock lock =
593	>	new PublicReentrantReadWriteLock(fair);
594	>	lock.readLock().lock();
595
596	<	try {
597	<	t1.start();
598	<	t2.start();
599	<	lock.readLock().lock();
600	<	lock.readLock().unlock();
583	<	Thread.sleep(SHORT_DELAY_MS);
584	<	lock.readLock().lock();
585	<	lock.readLock().unlock();
586	<	lock.writeLock().unlock();
587	<	t1.join(MEDIUM_DELAY_MS);
588	<	t2.join(MEDIUM_DELAY_MS);
589	<	assertTrue(!t1.isAlive());
590	<	assertTrue(!t2.isAlive());
596	>	Thread t1 = newStartedThread(new CheckedRunnable() {
597	>	public void realRun() {
598	>	lock.writeLock().lock();
599	>	lock.writeLock().unlock();
600	>	}});
601
602	<	} catch (Exception e) {
603	<	unexpectedException();
604	<	}
602	>	waitForQueuedThread(lock, t1);
603	>
604	>	Thread t2 = newStartedThread(new CheckedRunnable() {
605	>	public void realRun() {
606	>	lock.readLock().lock();
607	>	lock.readLock().unlock();
608	>	}});
609	>
610	>	if (fair)
611	>	waitForQueuedThread(lock, t2);
612	>
613	>	Thread t3 = newStartedThread(new CheckedRunnable() {
614	>	public void realRun() {
615	>	lock.readLock().tryLock();
616	>	lock.readLock().unlock();
617	>	}});
618	>
619	>	assertTrue(lock.getReadLockCount() > 0);
620	>	awaitTermination(t3);
621	>	assertTrue(t1.isAlive());
622	>	if (fair) assertTrue(t2.isAlive());
623	>	lock.readLock().unlock();
624	>	awaitTermination(t1);
625	>	awaitTermination(t2);
626		}
627
628	+	/**
629	+	* Read lock succeeds if write locked by current thread even if
630	+	* other threads are waiting for readlock
631	+	*/
632	+	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
633	+	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
634	+	public void testReadHoldingWriteLock2(boolean fair) {
635	+	final PublicReentrantReadWriteLock lock =
636	+	new PublicReentrantReadWriteLock(fair);
637	+	lock.writeLock().lock();
638	+	lock.readLock().lock();
639	+	lock.readLock().unlock();
640	+
641	+	Thread t1 = newStartedThread(new CheckedRunnable() {
642	+	public void realRun() {
643	+	lock.readLock().lock();
644	+	lock.readLock().unlock();
645	+	}});
646	+	Thread t2 = newStartedThread(new CheckedRunnable() {
647	+	public void realRun() {
648	+	lock.readLock().lock();
649	+	lock.readLock().unlock();
650	+	}});
651	+
652	+	waitForQueuedThread(lock, t1);
653	+	waitForQueuedThread(lock, t2);
654	+	assertWriteLockedByMoi(lock);
655	+	lock.readLock().lock();
656	+	lock.readLock().unlock();
657	+	releaseWriteLock(lock);
658	+	awaitTermination(t1);
659	+	awaitTermination(t2);
660	+	}
661
662		/**
663	<	* Fair Read lock succeeds if write locked by current thread even if
663	>	* Read lock succeeds if write locked by current thread even if
664		* other threads are waiting for writelock
665		*/
666	<	public void testReadHoldingWriteLockFair3() {
667	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
668	<	lock.writeLock().lock();
669	<	Thread t1 = new Thread(new Runnable() {
670	<	public void run() {
671	<	lock.writeLock().lock();
672	<	lock.writeLock().unlock();
673	<	}
610	<	});
611	<	Thread t2 = new Thread(new Runnable() {
612	<	public void run() {
613	<	lock.writeLock().lock();
614	<	lock.writeLock().unlock();
615	<	}
616	<	});
666	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
667	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
668	>	public void testReadHoldingWriteLock3(boolean fair) {
669	>	final PublicReentrantReadWriteLock lock =
670	>	new PublicReentrantReadWriteLock(fair);
671	>	lock.writeLock().lock();
672	>	lock.readLock().lock();
673	>	lock.readLock().unlock();
674
675	<	try {
676	<	t1.start();
677	<	t2.start();
678	<	lock.readLock().lock();
679	<	lock.readLock().unlock();
680	<	Thread.sleep(SHORT_DELAY_MS);
681	<	lock.readLock().lock();
682	<	lock.readLock().unlock();
683	<	lock.writeLock().unlock();
684	<	t1.join(MEDIUM_DELAY_MS);
628	<	t2.join(MEDIUM_DELAY_MS);
629	<	assertTrue(!t1.isAlive());
630	<	assertTrue(!t2.isAlive());
675	>	Thread t1 = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	lock.writeLock().lock();
678	>	lock.writeLock().unlock();
679	>	}});
680	>	Thread t2 = newStartedThread(new CheckedRunnable() {
681	>	public void realRun() {
682	>	lock.writeLock().lock();
683	>	lock.writeLock().unlock();
684	>	}});
685
686	<	} catch (Exception e) {
687	<	unexpectedException();
688	<	}
686	>	waitForQueuedThread(lock, t1);
687	>	waitForQueuedThread(lock, t2);
688	>	assertWriteLockedByMoi(lock);
689	>	lock.readLock().lock();
690	>	lock.readLock().unlock();
691	>	assertWriteLockedByMoi(lock);
692	>	lock.writeLock().unlock();
693	>	awaitTermination(t1);
694	>	awaitTermination(t2);
695		}
696
637	–
697		/**
698	<	* Fair Write lock succeeds if write locked by current thread even if
698	>	* Write lock succeeds if write locked by current thread even if
699		* other threads are waiting for writelock
700		*/
701	<	public void testWriteHoldingWriteLockFair4() {
702	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
703	<	lock.writeLock().lock();
704	<	Thread t1 = new Thread(new Runnable() {
705	<	public void run() {
706	<	lock.writeLock().lock();
707	<	lock.writeLock().unlock();
708	<	}
650	<	});
651	<	Thread t2 = new Thread(new Runnable() {
652	<	public void run() {
653	<	lock.writeLock().lock();
654	<	lock.writeLock().unlock();
655	<	}
656	<	});
701	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
702	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
703	>	public void testWriteHoldingWriteLock4(boolean fair) {
704	>	final PublicReentrantReadWriteLock lock =
705	>	new PublicReentrantReadWriteLock(fair);
706	>	lock.writeLock().lock();
707	>	lock.writeLock().lock();
708	>	lock.writeLock().unlock();
709
710	<	try {
711	<	t1.start();
712	<	t2.start();
713	<	Thread.sleep(SHORT_DELAY_MS);
714	<	assertTrue(lock.isWriteLockedByCurrentThread());
715	<	assertTrue(lock.getWriteHoldCount() == 1);
716	<	lock.writeLock().lock();
717	<	assertTrue(lock.getWriteHoldCount() == 2);
718	<	lock.writeLock().unlock();
719	<	lock.writeLock().lock();
668	<	lock.writeLock().unlock();
669	<	lock.writeLock().unlock();
670	<	t1.join(MEDIUM_DELAY_MS);
671	<	t2.join(MEDIUM_DELAY_MS);
672	<	assertTrue(!t1.isAlive());
673	<	assertTrue(!t2.isAlive());
710	>	Thread t1 = newStartedThread(new CheckedRunnable() {
711	>	public void realRun() {
712	>	lock.writeLock().lock();
713	>	lock.writeLock().unlock();
714	>	}});
715	>	Thread t2 = newStartedThread(new CheckedRunnable() {
716	>	public void realRun() {
717	>	lock.writeLock().lock();
718	>	lock.writeLock().unlock();
719	>	}});
720
721	<	} catch (Exception e) {
722	<	unexpectedException();
723	<	}
721	>	waitForQueuedThread(lock, t1);
722	>	waitForQueuedThread(lock, t2);
723	>	assertWriteLockedByMoi(lock);
724	>	assertEquals(1, lock.getWriteHoldCount());
725	>	lock.writeLock().lock();
726	>	assertWriteLockedByMoi(lock);
727	>	assertEquals(2, lock.getWriteHoldCount());
728	>	lock.writeLock().unlock();
729	>	assertWriteLockedByMoi(lock);
730	>	assertEquals(1, lock.getWriteHoldCount());
731	>	lock.writeLock().unlock();
732	>	awaitTermination(t1);
733	>	awaitTermination(t2);
734		}
735
680	–
736		/**
737		* Read tryLock succeeds if readlocked but not writelocked
738		*/
739	<	public void testTryLockWhenReadLocked() {
740	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
741	<	lock.readLock().lock();
742	<	Thread t = new Thread(new Runnable() {
743	<	public void run() {
744	<	threadAssertTrue(lock.readLock().tryLock());
745	<	lock.readLock().unlock();
746	<	}
747	<	});
748	<	try {
694	<	t.start();
695	<	t.join();
696	<	lock.readLock().unlock();
697	<	} catch (Exception e) {
698	<	unexpectedException();
699	<	}
700	<	}
701	<
739	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
740	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
741	>	public void testTryLockWhenReadLocked(boolean fair) {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
743	>	lock.readLock().lock();
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749
750	+	awaitTermination(t);
751	+	lock.readLock().unlock();
752	+	}
753
754		/**
755		* write tryLock fails when readlocked
756		*/
757	<	public void testWriteTryLockWhenReadLocked() {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	<	lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
764	<	});
765	<	try {
716	<	t.start();
717	<	t.join();
718	<	lock.readLock().unlock();
719	<	} catch (Exception e) {
720	<	unexpectedException();
721	<	}
722	<	}
723	<
757	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
758	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
759	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
760	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
761	>	lock.readLock().lock();
762	>	Thread t = newStartedThread(new CheckedRunnable() {
763	>	public void realRun() {
764	>	assertFalse(lock.writeLock().tryLock());
765	>	}});
766
767	<	/**
768	<	* Fair Read tryLock succeeds if readlocked but not writelocked
727	<	*/
728	<	public void testTryLockWhenReadLockedFair() {
729	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
730	<	lock.readLock().lock();
731	<	Thread t = new Thread(new Runnable() {
732	<	public void run() {
733	<	threadAssertTrue(lock.readLock().tryLock());
734	<	lock.readLock().unlock();
735	<	}
736	<	});
737	<	try {
738	<	t.start();
739	<	t.join();
740	<	lock.readLock().unlock();
741	<	} catch (Exception e) {
742	<	unexpectedException();
743	<	}
767	>	awaitTermination(t);
768	>	lock.readLock().unlock();
769		}
770
746	–
747	–
771		/**
772	<	* Fair write tryLock fails when readlocked
772	>	* write timed tryLock times out if locked
773		*/
774	<	public void testWriteTryLockWhenReadLockedFair() {
775	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
776	<	lock.readLock().lock();
777	<	Thread t = new Thread(new Runnable() {
778	<	public void run() {
779	<	threadAssertFalse(lock.writeLock().tryLock());
780	<	}
781	<	});
782	<	try {
783	<	t.start();
784	<	t.join();
785	<	lock.readLock().unlock();
786	<	} catch (Exception e) {
764	<	unexpectedException();
765	<	}
766	<	}
767	<
774	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
775	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
776	>	public void testWriteTryLock_Timeout(boolean fair) {
777	>	final PublicReentrantReadWriteLock lock =
778	>	new PublicReentrantReadWriteLock(fair);
779	>	lock.writeLock().lock();
780	>	Thread t = newStartedThread(new CheckedRunnable() {
781	>	public void realRun() throws InterruptedException {
782	>	long startTime = System.nanoTime();
783	>	long timeoutMillis = 10;
784	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
785	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
786	>	}});
787
788	+	awaitTermination(t);
789	+	releaseWriteLock(lock);
790	+	}
791
792		/**
793	<	* write timed tryLock times out if locked
793	>	* read timed tryLock times out if write-locked
794		*/
795	<	public void testWriteTryLock_Timeout() {
796	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
797	<	lock.writeLock().lock();
798	<	Thread t = new Thread(new Runnable() {
799	<	public void run() {
800	<	try {
801	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
802	<	} catch (Exception ex) {
803	<	threadUnexpectedException();
804	<	}
805	<	}
806	<	});
807	<	try {
808	<	t.start();
809	<	t.join();
810	<	lock.writeLock().unlock();
789	<	} catch (Exception e) {
790	<	unexpectedException();
791	<	}
795	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
796	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
797	>	public void testReadTryLock_Timeout(boolean fair) {
798	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
799	>	lock.writeLock().lock();
800	>	Thread t = newStartedThread(new CheckedRunnable() {
801	>	public void realRun() throws InterruptedException {
802	>	long startTime = System.nanoTime();
803	>	long timeoutMillis = 10;
804	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
805	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
806	>	}});
807	>
808	>	awaitTermination(t);
809	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
810	>	lock.writeLock().unlock();
811		}
812
813		/**
814	<	* read timed tryLock times out if write-locked
814	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
815		*/
816	<	public void testReadTryLock_Timeout() {
817	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	<	lock.writeLock().lock();
819	<	Thread t = new Thread(new Runnable() {
820	<	public void run() {
802	<	try {
803	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
804	<	} catch (Exception ex) {
805	<	threadUnexpectedException();
806	<	}
807	<	}
808	<	});
816	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
817	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
818	>	public void testWriteLockInterruptibly(boolean fair) {
819	>	final PublicReentrantReadWriteLock lock =
820	>	new PublicReentrantReadWriteLock(fair);
821		try {
822	<	t.start();
823	<	t.join();
824	<	lock.writeLock().unlock();
813	<	} catch (Exception e) {
814	<	unexpectedException();
822	>	lock.writeLock().lockInterruptibly();
823	>	} catch (InterruptedException ie) {
824	>	threadUnexpectedException(ie);
825		}
826	<	}
826	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
827	>	public void realRun() throws InterruptedException {
828	>	lock.writeLock().lockInterruptibly();
829	>	}});
830
831	+	waitForQueuedThread(lock, t);
832	+	t.interrupt();
833	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
834	+	awaitTermination(t);
835	+	releaseWriteLock(lock);
836	+	}
837
838		/**
839	<	* write lockInterruptibly succeeds if lock free else is interruptible
839	>	* read lockInterruptibly succeeds if lock free else is interruptible
840		*/
841	<	public void testWriteLockInterruptibly() {
842	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
843	<	try {
844	<	lock.writeLock().lockInterruptibly();
845	<	} catch (Exception e) {
827	<	unexpectedException();
828	<	}
829	<	Thread t = new Thread(new Runnable() {
830	<	public void run() {
831	<	try {
832	<	lock.writeLock().lockInterruptibly();
833	<	threadShouldThrow();
834	<	}
835	<	catch (InterruptedException success) {
836	<	}
837	<	}
838	<	});
841	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
842	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
843	>	public void testReadLockInterruptibly(boolean fair) {
844	>	final PublicReentrantReadWriteLock lock =
845	>	new PublicReentrantReadWriteLock(fair);
846		try {
847	<	t.start();
848	<	Thread.sleep(SHORT_DELAY_MS);
849	<	t.interrupt();
850	<	Thread.sleep(SHORT_DELAY_MS);
851	<	t.join();
845	<	lock.writeLock().unlock();
846	<	} catch (Exception e) {
847	<	unexpectedException();
847	>	lock.readLock().lockInterruptibly();
848	>	lock.readLock().unlock();
849	>	lock.writeLock().lockInterruptibly();
850	>	} catch (InterruptedException ie) {
851	>	threadUnexpectedException(ie);
852		}
853	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
854	+	public void realRun() throws InterruptedException {
855	+	lock.readLock().lockInterruptibly();
856	+	}});
857	+
858	+	waitForQueuedThread(lock, t);
859	+	t.interrupt();
860	+	awaitTermination(t);
861	+	releaseWriteLock(lock);
862		}
863
864		/**
865	<	*  read lockInterruptibly succeeds if lock free else is interruptible
865	>	* Calling await without holding lock throws IllegalMonitorStateException
866		*/
867	<	public void testReadLockInterruptibly() {
868	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	<	try {
870	<	lock.writeLock().lockInterruptibly();
871	<	} catch (Exception e) {
872	<	unexpectedException();
873	<	}
874	<	Thread t = new Thread(new Runnable() {
875	<	public void run() {
876	<	try {
877	<	lock.readLock().lockInterruptibly();
878	<	threadShouldThrow();
879	<	}
867	<	catch (InterruptedException success) {
868	<	}
869	<	}
870	<	});
871	<	try {
872	<	t.start();
873	<	Thread.sleep(SHORT_DELAY_MS);
874	<	t.interrupt();
875	<	t.join();
876	<	lock.writeLock().unlock();
877	<	} catch (Exception e) {
878	<	unexpectedException();
867	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
868	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
869	>	public void testAwait_IMSE(boolean fair) {
870	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
871	>	final Condition c = lock.writeLock().newCondition();
872	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
873	>	long startTime = System.nanoTime();
874	>	try {
875	>	await(c, awaitMethod);
876	>	shouldThrow();
877	>	} catch (IllegalMonitorStateException success) {
878	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
879	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
880		}
881		}
882
883		/**
884	<	* Calling await without holding lock throws IllegalMonitorStateException
884	>	* Calling signal without holding lock throws IllegalMonitorStateException
885		*/
886	<	public void testAwait_IllegalMonitor() {
887	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
886	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
887	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
888	>	public void testSignal_IMSE(boolean fair) {
889	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
890		final Condition c = lock.writeLock().newCondition();
891		try {
892	<	c.await();
890	<	shouldThrow();
891	<	}
892	<	catch (IllegalMonitorStateException success) {
893	<	}
894	<	catch (Exception ex) {
892	>	c.signal();
893		shouldThrow();
894	<	}
894	>	} catch (IllegalMonitorStateException success) {}
895		}
896
897		/**
898	<	* Calling signal without holding lock throws IllegalMonitorStateException
898	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
899		*/
900	<	public void testSignal_IllegalMonitor() {
901	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
900	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
901	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
902	>	public void testSignalAll_IMSE(boolean fair) {
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
904		final Condition c = lock.writeLock().newCondition();
905		try {
906	<	c.signal();
906	>	c.signalAll();
907		shouldThrow();
908	<	}
909	<	catch (IllegalMonitorStateException success) {
910	<	}
911	<	catch (Exception ex) {
912	<	unexpectedException();
913	<	}
908	>	} catch (IllegalMonitorStateException success) {}
909		}
910
911		/**
912		* awaitNanos without a signal times out
913		*/
914	<	public void testAwaitNanos_Timeout() {
915	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
916	<	final Condition c = lock.writeLock().newCondition();
914	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
915	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
916	>	public void testAwaitNanos_Timeout(boolean fair) {
917		try {
918	+	final ReentrantReadWriteLock lock =
919	+	new ReentrantReadWriteLock(fair);
920	+	final Condition c = lock.writeLock().newCondition();
921		lock.writeLock().lock();
922	<	long t = c.awaitNanos(100);
923	<	assertTrue(t <= 0);
922	>	long startTime = System.nanoTime();
923	>	long timeoutMillis = 10;
924	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
925	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
926	>	assertTrue(nanosRemaining <= 0);
927	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
928		lock.writeLock().unlock();
929	<	}
930	<	catch (Exception ex) {
929	<	unexpectedException();
929	>	} catch (InterruptedException e) {
930	>	threadUnexpectedException(e);
931		}
932		}
933
933	–
934		/**
935	<	*  timed await without a signal times out
935	>	* timed await without a signal times out
936		*/
937	<	public void testAwait_Timeout() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
939	<	final Condition c = lock.writeLock().newCondition();
937	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
938	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
939	>	public void testAwait_Timeout(boolean fair) {
940		try {
941	+	final ReentrantReadWriteLock lock =
942	+	new ReentrantReadWriteLock(fair);
943	+	final Condition c = lock.writeLock().newCondition();
944		lock.writeLock().lock();
945	+	long startTime = System.nanoTime();
946	+	long timeoutMillis = 10;
947	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
948	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
949		lock.writeLock().unlock();
950	<	}
951	<	catch (Exception ex) {
945	<	unexpectedException();
950	>	} catch (InterruptedException e) {
951	>	threadUnexpectedException(e);
952		}
953		}
954
955		/**
956		* awaitUntil without a signal times out
957		*/
958	<	public void testAwaitUntil_Timeout() {
959	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	<	final Condition c = lock.writeLock().newCondition();
961	<	try {
958	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
959	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
960	>	public void testAwaitUntil_Timeout(boolean fair) {
961	>	try {
962	>	final ReentrantReadWriteLock lock =
963	>	new ReentrantReadWriteLock(fair);
964	>	final Condition c = lock.writeLock().newCondition();
965		lock.writeLock().lock();
966	+	long startTime = System.nanoTime();
967	+	long timeoutMillis = 10;
968		java.util.Date d = new java.util.Date();
969	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
970	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
971		lock.writeLock().unlock();
972	<	}
973	<	catch (Exception ex) {
961	<	unexpectedException();
972	>	} catch (InterruptedException e) {
973	>	threadUnexpectedException(e);
974		}
975		}
976
977		/**
978		* await returns when signalled
979		*/
980	<	public void testAwait() {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
980	>	public void testAwait()      { testAwait(false); }
981	>	public void testAwait_fair() { testAwait(true); }
982	>	public void testAwait(boolean fair) {
983	>	final PublicReentrantReadWriteLock lock =
984	>	new PublicReentrantReadWriteLock(fair);
985		final Condition c = lock.writeLock().newCondition();
986	<	Thread t = new Thread(new Runnable() {
987	<	public void run() {
988	<	try {
989	<	lock.writeLock().lock();
990	<	c.await();
991	<	lock.writeLock().unlock();
992	<	}
993	<	catch (InterruptedException e) {
979	<	threadUnexpectedException();
980	<	}
981	<	}
982	<	});
983	<
984	<	try {
985	<	t.start();
986	<	Thread.sleep(SHORT_DELAY_MS);
987	<	lock.writeLock().lock();
988	<	c.signal();
989	<	lock.writeLock().unlock();
990	<	t.join(SHORT_DELAY_MS);
991	<	assertFalse(t.isAlive());
992	<	}
993	<	catch (Exception ex) {
994	<	unexpectedException();
995	<	}
996	<	}
997	<
998	<	/** A helper class for uninterruptible wait tests */
999	<	class UninterruptableThread extends Thread {
1000	<	private Lock lock;
1001	<	private Condition c;
1002	<
1003	<	public volatile boolean canAwake = false;
1004	<	public volatile boolean interrupted = false;
1005	<	public volatile boolean lockStarted = false;
1006	<
1007	<	public UninterruptableThread(Lock lock, Condition c) {
1008	<	this.lock = lock;
1009	<	this.c = c;
1010	<	}
1011	<
1012	<	public synchronized void run() {
1013	<	lock.lock();
1014	<	lockStarted = true;
1015	<
1016	<	while (!canAwake) {
1017	<	c.awaitUninterruptibly();
1018	<	}
986	>	final CountDownLatch locked = new CountDownLatch(1);
987	>	Thread t = newStartedThread(new CheckedRunnable() {
988	>	public void realRun() throws InterruptedException {
989	>	lock.writeLock().lock();
990	>	locked.countDown();
991	>	c.await();
992	>	lock.writeLock().unlock();
993	>	}});
994
995	<	interrupted = isInterrupted();
996	<	lock.unlock();
997	<	}
995	>	await(locked);
996	>	lock.writeLock().lock();
997	>	assertHasWaiters(lock, c, t);
998	>	c.signal();
999	>	assertHasNoWaiters(lock, c);
1000	>	assertTrue(t.isAlive());
1001	>	lock.writeLock().unlock();
1002	>	awaitTermination(t);
1003		}
1004
1005		/**
1006		* awaitUninterruptibly doesn't abort on interrupt
1007		*/
1008	<	public void testAwaitUninterruptibly() {
1009	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1008	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1009	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1010	>	public void testAwaitUninterruptibly(boolean fair) {
1011	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1012		final Condition c = lock.writeLock().newCondition();
1013	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1014	<
1015	<	try {
1016	<	thread.start();
1017	<
1018	<	while (!thread.lockStarted) {
1019	<	Thread.sleep(100);
1038	<	}
1039	<
1040	<	lock.writeLock().lock();
1041	<	try {
1042	<	thread.interrupt();
1043	<	thread.canAwake = true;
1044	<	c.signal();
1045	<	} finally {
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedRunnable() {
1015	>	public void realRun() {
1016	>	lock.writeLock().lock();
1017	>	locked.countDown();
1018	>	c.awaitUninterruptibly();
1019	>	assertTrue(Thread.interrupted());
1020		lock.writeLock().unlock();
1021	<	}
1021	>	}});
1022
1023	<	thread.join();
1024	<	assertTrue(thread.interrupted);
1025	<	assertFalse(thread.isAlive());
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1023	>	await(locked);
1024	>	lock.writeLock().lock();
1025	>	lock.writeLock().unlock();
1026	>	t.interrupt();
1027	>	long timeoutMillis = 10;
1028	>	assertThreadStaysAlive(t, timeoutMillis);
1029	>	lock.writeLock().lock();
1030	>	c.signal();
1031	>	lock.writeLock().unlock();
1032	>	awaitTermination(t);
1033		}
1034
1035		/**
1036	<	* await is interruptible
1036	>	* await/awaitNanos/awaitUntil is interruptible
1037		*/
1038	<	public void testAwait_Interrupt() {
1039	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1038	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1039	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1040	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1041	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1042	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1043	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1044	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1045	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1046	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1047	>	final PublicReentrantReadWriteLock lock =
1048	>	new PublicReentrantReadWriteLock(fair);
1049		final Condition c = lock.writeLock().newCondition();
1050	<	Thread t = new Thread(new Runnable() {
1051	<	public void run() {
1052	<	try {
1053	<	lock.writeLock().lock();
1054	<	c.await();
1055	<	lock.writeLock().unlock();
1056	<	threadShouldThrow();
1057	<	}
1058	<	catch (InterruptedException success) {
1059	<	}
1060	<	}
1061	<	});
1062	<
1063	<	try {
1064	<	t.start();
1065	<	Thread.sleep(SHORT_DELAY_MS);
1066	<	t.interrupt();
1067	<	t.join(SHORT_DELAY_MS);
1068	<	assertFalse(t.isAlive());
1069	<	}
1070	<	catch (Exception ex) {
1071	<	unexpectedException();
1085	<	}
1050	>	final CountDownLatch locked = new CountDownLatch(1);
1051	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1052	>	public void realRun() throws InterruptedException {
1053	>	lock.writeLock().lock();
1054	>	assertWriteLockedByMoi(lock);
1055	>	assertHasNoWaiters(lock, c);
1056	>	locked.countDown();
1057	>	try {
1058	>	await(c, awaitMethod);
1059	>	} finally {
1060	>	assertWriteLockedByMoi(lock);
1061	>	assertHasNoWaiters(lock, c);
1062	>	lock.writeLock().unlock();
1063	>	assertFalse(Thread.interrupted());
1064	>	}
1065	>	}});
1066	>
1067	>	await(locked);
1068	>	assertHasWaiters(lock, c, t);
1069	>	t.interrupt();
1070	>	awaitTermination(t);
1071	>	assertNotWriteLocked(lock);
1072		}
1073
1074		/**
1075	<	* awaitNanos is interruptible
1075	>	* signalAll wakes up all threads
1076		*/
1077	<	public void testAwaitNanos_Interrupt() {
1078	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1077	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1078	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1079	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1080	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1081	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1082	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1083	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1084	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1085	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1086	>	final PublicReentrantReadWriteLock lock =
1087	>	new PublicReentrantReadWriteLock(fair);
1088		final Condition c = lock.writeLock().newCondition();
1089	<	Thread t = new Thread(new Runnable() {
1090	<	public void run() {
1091	<	try {
1092	<	lock.writeLock().lock();
1093	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1094	<	lock.writeLock().unlock();
1095	<	threadShouldThrow();
1096	<	}
1097	<	catch (InterruptedException success) {
1103	<	}
1104	<	}
1105	<	});
1106	<
1107	<	try {
1108	<	t.start();
1109	<	Thread.sleep(SHORT_DELAY_MS);
1110	<	t.interrupt();
1111	<	t.join(SHORT_DELAY_MS);
1112	<	assertFalse(t.isAlive());
1113	<	}
1114	<	catch (Exception ex) {
1115	<	unexpectedException();
1089	>	final CountDownLatch locked = new CountDownLatch(2);
1090	>	final Lock writeLock = lock.writeLock();
1091	>	class Awaiter extends CheckedRunnable {
1092	>	public void realRun() throws InterruptedException {
1093	>	writeLock.lock();
1094	>	locked.countDown();
1095	>	await(c, awaitMethod);
1096	>	writeLock.unlock();
1097	>	}
1098		}
1099	+
1100	+	Thread t1 = newStartedThread(new Awaiter());
1101	+	Thread t2 = newStartedThread(new Awaiter());
1102	+
1103	+	await(locked);
1104	+	writeLock.lock();
1105	+	assertHasWaiters(lock, c, t1, t2);
1106	+	c.signalAll();
1107	+	assertHasNoWaiters(lock, c);
1108	+	writeLock.unlock();
1109	+	awaitTermination(t1);
1110	+	awaitTermination(t2);
1111		}
1112
1113		/**
1114	<	* awaitUntil is interruptible
1115	<	*/
1116	<	public void testAwaitUntil_Interrupt() {
1117	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1114	>	* signal wakes up waiting threads in FIFO order.
1115	>	*/
1116	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1117	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1118	>	public void testSignalWakesFifo(boolean fair) {
1119	>	final PublicReentrantReadWriteLock lock =
1120	>	new PublicReentrantReadWriteLock(fair);
1121		final Condition c = lock.writeLock().newCondition();
1122	<	Thread t = new Thread(new Runnable() {
1123	<	public void run() {
1124	<	try {
1125	<	lock.writeLock().lock();
1126	<	java.util.Date d = new java.util.Date();
1127	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1128	<	lock.writeLock().unlock();
1129	<	threadShouldThrow();
1130	<	}
1131	<	catch (InterruptedException success) {
1132	<	}
1133	<	}
1134	<	});
1135	<
1136	<	try {
1137	<	t.start();
1138	<	Thread.sleep(SHORT_DELAY_MS);
1139	<	t.interrupt();
1140	<	t.join(SHORT_DELAY_MS);
1141	<	assertFalse(t.isAlive());
1142	<	}
1143	<	catch (Exception ex) {
1144	<	unexpectedException();
1145	<	}
1122	>	final CountDownLatch locked1 = new CountDownLatch(1);
1123	>	final CountDownLatch locked2 = new CountDownLatch(1);
1124	>	final Lock writeLock = lock.writeLock();
1125	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1126	>	public void realRun() throws InterruptedException {
1127	>	writeLock.lock();
1128	>	locked1.countDown();
1129	>	c.await();
1130	>	writeLock.unlock();
1131	>	}});
1132	>
1133	>	await(locked1);
1134	>
1135	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1136	>	public void realRun() throws InterruptedException {
1137	>	writeLock.lock();
1138	>	locked2.countDown();
1139	>	c.await();
1140	>	writeLock.unlock();
1141	>	}});
1142	>
1143	>	await(locked2);
1144	>
1145	>	writeLock.lock();
1146	>	assertHasWaiters(lock, c, t1, t2);
1147	>	assertFalse(lock.hasQueuedThreads());
1148	>	c.signal();
1149	>	assertHasWaiters(lock, c, t2);
1150	>	assertTrue(lock.hasQueuedThread(t1));
1151	>	assertFalse(lock.hasQueuedThread(t2));
1152	>	c.signal();
1153	>	assertHasNoWaiters(lock, c);
1154	>	assertTrue(lock.hasQueuedThread(t1));
1155	>	assertTrue(lock.hasQueuedThread(t2));
1156	>	writeLock.unlock();
1157	>	awaitTermination(t1);
1158	>	awaitTermination(t2);
1159		}
1160
1161		/**
1162	<	* signalAll wakes up all threads
1163	<	*/
1164	<	public void testSignalAll() {
1165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1162	>	* await after multiple reentrant locking preserves lock count
1163	>	*/
1164	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1165	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1166	>	public void testAwaitLockCount(boolean fair) {
1167	>	final PublicReentrantReadWriteLock lock =
1168	>	new PublicReentrantReadWriteLock(fair);
1169		final Condition c = lock.writeLock().newCondition();
1170	<	Thread t1 = new Thread(new Runnable() {
1171	<	public void run() {
1172	<	try {
1173	<	lock.writeLock().lock();
1174	<	c.await();
1175	<	lock.writeLock().unlock();
1176	<	}
1177	<	catch (InterruptedException e) {
1178	<	threadUnexpectedException();
1179	<	}
1180	<	}
1181	<	});
1169	<
1170	<	Thread t2 = new Thread(new Runnable() {
1171	<	public void run() {
1172	<	try {
1173	<	lock.writeLock().lock();
1174	<	c.await();
1175	<	lock.writeLock().unlock();
1176	<	}
1177	<	catch (InterruptedException e) {
1178	<	threadUnexpectedException();
1179	<	}
1180	<	}
1181	<	});
1170	>	final CountDownLatch locked = new CountDownLatch(2);
1171	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1172	>	public void realRun() throws InterruptedException {
1173	>	lock.writeLock().lock();
1174	>	assertWriteLockedByMoi(lock);
1175	>	assertEquals(1, lock.writeLock().getHoldCount());
1176	>	locked.countDown();
1177	>	c.await();
1178	>	assertWriteLockedByMoi(lock);
1179	>	assertEquals(1, lock.writeLock().getHoldCount());
1180	>	lock.writeLock().unlock();
1181	>	}});
1182
1183	<	try {
1184	<	t1.start();
1185	<	t2.start();
1186	<	Thread.sleep(SHORT_DELAY_MS);
1187	<	lock.writeLock().lock();
1188	<	c.signalAll();
1189	<	lock.writeLock().unlock();
1190	<	t1.join(SHORT_DELAY_MS);
1191	<	t2.join(SHORT_DELAY_MS);
1192	<	assertFalse(t1.isAlive());
1193	<	assertFalse(t2.isAlive());
1194	<	}
1195	<	catch (Exception ex) {
1196	<	unexpectedException();
1197	<	}
1183	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1184	>	public void realRun() throws InterruptedException {
1185	>	lock.writeLock().lock();
1186	>	lock.writeLock().lock();
1187	>	assertWriteLockedByMoi(lock);
1188	>	assertEquals(2, lock.writeLock().getHoldCount());
1189	>	locked.countDown();
1190	>	c.await();
1191	>	assertWriteLockedByMoi(lock);
1192	>	assertEquals(2, lock.writeLock().getHoldCount());
1193	>	lock.writeLock().unlock();
1194	>	lock.writeLock().unlock();
1195	>	}});
1196	>
1197	>	await(locked);
1198	>	lock.writeLock().lock();
1199	>	assertHasWaiters(lock, c, t1, t2);
1200	>	c.signalAll();
1201	>	assertHasNoWaiters(lock, c);
1202	>	lock.writeLock().unlock();
1203	>	awaitTermination(t1);
1204	>	awaitTermination(t2);
1205		}
1206
1207		/**
1208		* A serialized lock deserializes as unlocked
1209		*/
1210	<	public void testSerialization() {
1211	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1212	<	l.readLock().lock();
1213	<	l.readLock().unlock();
1210	>	public void testSerialization()      { testSerialization(false); }
1211	>	public void testSerialization_fair() { testSerialization(true); }
1212	>	public void testSerialization(boolean fair) {
1213	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1214	>	lock.writeLock().lock();
1215	>	lock.readLock().lock();
1216
1217	<	try {
1218	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1219	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1220	<	out.writeObject(l);
1221	<	out.close();
1222	<
1223	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1224	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1225	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1226	<	r.readLock().lock();
1227	<	r.readLock().unlock();
1228	<	} catch (Exception e) {
1229	<	e.printStackTrace();
1230	<	unexpectedException();
1231	<	}
1217	>	ReentrantReadWriteLock clone = serialClone(lock);
1218	>	assertEquals(lock.isFair(), clone.isFair());
1219	>	assertTrue(lock.isWriteLocked());
1220	>	assertFalse(clone.isWriteLocked());
1221	>	assertEquals(1, lock.getReadLockCount());
1222	>	assertEquals(0, clone.getReadLockCount());
1223	>	clone.writeLock().lock();
1224	>	clone.readLock().lock();
1225	>	assertTrue(clone.isWriteLocked());
1226	>	assertEquals(1, clone.getReadLockCount());
1227	>	clone.readLock().unlock();
1228	>	clone.writeLock().unlock();
1229	>	assertFalse(clone.isWriteLocked());
1230	>	assertEquals(1, lock.getReadLockCount());
1231	>	assertEquals(0, clone.getReadLockCount());
1232		}
1233
1234		/**
1235		* hasQueuedThreads reports whether there are waiting threads
1236		*/
1237	<	public void testhasQueuedThreads() {
1238	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1237	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1238	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1239	>	public void testHasQueuedThreads(boolean fair) {
1240	>	final PublicReentrantReadWriteLock lock =
1241	>	new PublicReentrantReadWriteLock(fair);
1242		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1243		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1244	<	try {
1245	<	assertFalse(lock.hasQueuedThreads());
1246	<	lock.writeLock().lock();
1247	<	t1.start();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1249	<	assertTrue(lock.hasQueuedThreads());
1250	<	t2.start();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1252	<	assertTrue(lock.hasQueuedThreads());
1253	<	t1.interrupt();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1255	<	assertTrue(lock.hasQueuedThreads());
1256	<	lock.writeLock().unlock();
1257	<	Thread.sleep(SHORT_DELAY_MS);
1258	<	assertFalse(lock.hasQueuedThreads());
1247	<	t1.join();
1248	<	t2.join();
1249	<	} catch (Exception e) {
1250	<	unexpectedException();
1251	<	}
1244	>	assertFalse(lock.hasQueuedThreads());
1245	>	lock.writeLock().lock();
1246	>	assertFalse(lock.hasQueuedThreads());
1247	>	t1.start();
1248	>	waitForQueuedThread(lock, t1);
1249	>	assertTrue(lock.hasQueuedThreads());
1250	>	t2.start();
1251	>	waitForQueuedThread(lock, t2);
1252	>	assertTrue(lock.hasQueuedThreads());
1253	>	t1.interrupt();
1254	>	awaitTermination(t1);
1255	>	assertTrue(lock.hasQueuedThreads());
1256	>	lock.writeLock().unlock();
1257	>	awaitTermination(t2);
1258	>	assertFalse(lock.hasQueuedThreads());
1259		}
1260
1261		/**
1262		* hasQueuedThread(null) throws NPE
1263		*/
1264	<	public void testHasQueuedThreadNPE() {
1265	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1264	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1265	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1266	>	public void testHasQueuedThreadNPE(boolean fair) {
1267	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1268		try {
1269	<	sync.hasQueuedThread(null);
1269	>	lock.hasQueuedThread(null);
1270		shouldThrow();
1271	<	} catch (NullPointerException success) {
1263	<	}
1271	>	} catch (NullPointerException success) {}
1272		}
1273
1274		/**
1275		* hasQueuedThread reports whether a thread is queued.
1276		*/
1277	<	public void testHasQueuedThread() {
1278	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1279	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1280	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1281	<	try {
1282	<	assertFalse(sync.hasQueuedThread(t1));
1283	<	assertFalse(sync.hasQueuedThread(t2));
1284	<	sync.writeLock().lock();
1285	<	t1.start();
1286	<	Thread.sleep(SHORT_DELAY_MS);
1287	<	assertTrue(sync.hasQueuedThread(t1));
1288	<	t2.start();
1289	<	Thread.sleep(SHORT_DELAY_MS);
1290	<	assertTrue(sync.hasQueuedThread(t1));
1291	<	assertTrue(sync.hasQueuedThread(t2));
1292	<	t1.interrupt();
1293	<	Thread.sleep(SHORT_DELAY_MS);
1294	<	assertFalse(sync.hasQueuedThread(t1));
1295	<	assertTrue(sync.hasQueuedThread(t2));
1296	<	sync.writeLock().unlock();
1297	<	Thread.sleep(SHORT_DELAY_MS);
1298	<	assertFalse(sync.hasQueuedThread(t1));
1299	<	Thread.sleep(SHORT_DELAY_MS);
1300	<	assertFalse(sync.hasQueuedThread(t2));
1301	<	t1.join();
1302	<	t2.join();
1295	<	} catch (Exception e) {
1296	<	unexpectedException();
1297	<	}
1277	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1278	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1279	>	public void testHasQueuedThread(boolean fair) {
1280	>	final PublicReentrantReadWriteLock lock =
1281	>	new PublicReentrantReadWriteLock(fair);
1282	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1283	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1284	>	assertFalse(lock.hasQueuedThread(t1));
1285	>	assertFalse(lock.hasQueuedThread(t2));
1286	>	lock.writeLock().lock();
1287	>	t1.start();
1288	>	waitForQueuedThread(lock, t1);
1289	>	assertTrue(lock.hasQueuedThread(t1));
1290	>	assertFalse(lock.hasQueuedThread(t2));
1291	>	t2.start();
1292	>	waitForQueuedThread(lock, t2);
1293	>	assertTrue(lock.hasQueuedThread(t1));
1294	>	assertTrue(lock.hasQueuedThread(t2));
1295	>	t1.interrupt();
1296	>	awaitTermination(t1);
1297	>	assertFalse(lock.hasQueuedThread(t1));
1298	>	assertTrue(lock.hasQueuedThread(t2));
1299	>	lock.writeLock().unlock();
1300	>	awaitTermination(t2);
1301	>	assertFalse(lock.hasQueuedThread(t1));
1302	>	assertFalse(lock.hasQueuedThread(t2));
1303		}
1304
1300	–
1305		/**
1306		* getQueueLength reports number of waiting threads
1307		*/
1308	<	public void testGetQueueLength() {
1309	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1308	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1309	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1310	>	public void testGetQueueLength(boolean fair) {
1311	>	final PublicReentrantReadWriteLock lock =
1312	>	new PublicReentrantReadWriteLock(fair);
1313		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1314		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1315	<	try {
1316	<	assertEquals(0, lock.getQueueLength());
1317	<	lock.writeLock().lock();
1318	<	t1.start();
1319	<	Thread.sleep(SHORT_DELAY_MS);
1320	<	assertEquals(1, lock.getQueueLength());
1321	<	t2.start();
1322	<	Thread.sleep(SHORT_DELAY_MS);
1323	<	assertEquals(2, lock.getQueueLength());
1324	<	t1.interrupt();
1325	<	Thread.sleep(SHORT_DELAY_MS);
1326	<	assertEquals(1, lock.getQueueLength());
1327	<	lock.writeLock().unlock();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1322	<	assertEquals(0, lock.getQueueLength());
1323	<	t1.join();
1324	<	t2.join();
1325	<	} catch (Exception e) {
1326	<	unexpectedException();
1327	<	}
1315	>	assertEquals(0, lock.getQueueLength());
1316	>	lock.writeLock().lock();
1317	>	t1.start();
1318	>	waitForQueuedThread(lock, t1);
1319	>	assertEquals(1, lock.getQueueLength());
1320	>	t2.start();
1321	>	waitForQueuedThread(lock, t2);
1322	>	assertEquals(2, lock.getQueueLength());
1323	>	t1.interrupt();
1324	>	awaitTermination(t1);
1325	>	assertEquals(1, lock.getQueueLength());
1326	>	lock.writeLock().unlock();
1327	>	awaitTermination(t2);
1328	>	assertEquals(0, lock.getQueueLength());
1329		}
1330
1331		/**
1332		* getQueuedThreads includes waiting threads
1333		*/
1334	<	public void testGetQueuedThreads() {
1335	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1334	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1335	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1336	>	public void testGetQueuedThreads(boolean fair) {
1337	>	final PublicReentrantReadWriteLock lock =
1338	>	new PublicReentrantReadWriteLock(fair);
1339		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1340		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1341	<	try {
1342	<	assertTrue(lock.getQueuedThreads().isEmpty());
1343	<	lock.writeLock().lock();
1344	<	assertTrue(lock.getQueuedThreads().isEmpty());
1345	<	t1.start();
1346	<	Thread.sleep(SHORT_DELAY_MS);
1347	<	assertTrue(lock.getQueuedThreads().contains(t1));
1348	<	t2.start();
1349	<	Thread.sleep(SHORT_DELAY_MS);
1350	<	assertTrue(lock.getQueuedThreads().contains(t1));
1351	<	assertTrue(lock.getQueuedThreads().contains(t2));
1352	<	t1.interrupt();
1353	<	Thread.sleep(SHORT_DELAY_MS);
1354	<	assertFalse(lock.getQueuedThreads().contains(t1));
1355	<	assertTrue(lock.getQueuedThreads().contains(t2));
1356	<	lock.writeLock().unlock();
1357	<	Thread.sleep(SHORT_DELAY_MS);
1358	<	assertTrue(lock.getQueuedThreads().isEmpty());
1359	<	t1.join();
1360	<	t2.join();
1357	<	} catch (Exception e) {
1358	<	unexpectedException();
1359	<	}
1341	>	assertTrue(lock.getQueuedThreads().isEmpty());
1342	>	lock.writeLock().lock();
1343	>	assertTrue(lock.getQueuedThreads().isEmpty());
1344	>	t1.start();
1345	>	waitForQueuedThread(lock, t1);
1346	>	assertEquals(1, lock.getQueuedThreads().size());
1347	>	assertTrue(lock.getQueuedThreads().contains(t1));
1348	>	t2.start();
1349	>	waitForQueuedThread(lock, t2);
1350	>	assertEquals(2, lock.getQueuedThreads().size());
1351	>	assertTrue(lock.getQueuedThreads().contains(t1));
1352	>	assertTrue(lock.getQueuedThreads().contains(t2));
1353	>	t1.interrupt();
1354	>	awaitTermination(t1);
1355	>	assertFalse(lock.getQueuedThreads().contains(t1));
1356	>	assertTrue(lock.getQueuedThreads().contains(t2));
1357	>	assertEquals(1, lock.getQueuedThreads().size());
1358	>	lock.writeLock().unlock();
1359	>	awaitTermination(t2);
1360	>	assertTrue(lock.getQueuedThreads().isEmpty());
1361		}
1362
1363		/**
1364		* hasWaiters throws NPE if null
1365		*/
1366	<	public void testHasWaitersNPE() {
1367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1366	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1367	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1368	>	public void testHasWaitersNPE(boolean fair) {
1369	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1370		try {
1371		lock.hasWaiters(null);
1372		shouldThrow();
1373	<	} catch (NullPointerException success) {
1371	<	} catch (Exception ex) {
1372	<	unexpectedException();
1373	<	}
1373	>	} catch (NullPointerException success) {}
1374		}
1375
1376		/**
1377		* getWaitQueueLength throws NPE if null
1378		*/
1379	<	public void testGetWaitQueueLengthNPE() {
1380	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1379	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1380	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1381	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1382	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1383		try {
1384		lock.getWaitQueueLength(null);
1385		shouldThrow();
1386	<	} catch (NullPointerException success) {
1385	<	} catch (Exception ex) {
1386	<	unexpectedException();
1387	<	}
1386	>	} catch (NullPointerException success) {}
1387		}
1388
1390	–
1389		/**
1390		* getWaitingThreads throws NPE if null
1391		*/
1392	<	public void testGetWaitingThreadsNPE() {
1393	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1392	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1393	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1394	>	public void testGetWaitingThreadsNPE(boolean fair) {
1395	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1396		try {
1397		lock.getWaitingThreads(null);
1398		shouldThrow();
1399	<	} catch (NullPointerException success) {
1400	<	} catch (Exception ex) {
1401	<	unexpectedException();
1402	<	}
1399	>	} catch (NullPointerException success) {}
1400		}
1401
1402		/**
1403	<	* hasWaiters throws IAE if not owned
1403	>	* hasWaiters throws IllegalArgumentException if not owned
1404		*/
1405	<	public void testHasWaitersIAE() {
1406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1405	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1406	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1407	>	public void testHasWaitersIAE(boolean fair) {
1408	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1409		final Condition c = lock.writeLock().newCondition();
1410	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1410	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1411		try {
1412		lock2.hasWaiters(c);
1413		shouldThrow();
1414	<	} catch (IllegalArgumentException success) {
1416	<	} catch (Exception ex) {
1417	<	unexpectedException();
1418	<	}
1414	>	} catch (IllegalArgumentException success) {}
1415		}
1416
1417		/**
1418	<	* hasWaiters throws IMSE if not locked
1418	>	* hasWaiters throws IllegalMonitorStateException if not locked
1419		*/
1420	<	public void testHasWaitersIMSE() {
1421	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1420	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1421	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1422	>	public void testHasWaitersIMSE(boolean fair) {
1423	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1424		final Condition c = lock.writeLock().newCondition();
1425		try {
1426		lock.hasWaiters(c);
1427		shouldThrow();
1428	<	} catch (IllegalMonitorStateException success) {
1431	<	} catch (Exception ex) {
1432	<	unexpectedException();
1433	<	}
1428	>	} catch (IllegalMonitorStateException success) {}
1429		}
1430
1436	–
1431		/**
1432	<	* getWaitQueueLength throws IAE if not owned
1432	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1433		*/
1434	<	public void testGetWaitQueueLengthIAE() {
1435	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1434	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1435	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1436	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1437	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1438		final Condition c = lock.writeLock().newCondition();
1439	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1439	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1440		try {
1441		lock2.getWaitQueueLength(c);
1442		shouldThrow();
1443	<	} catch (IllegalArgumentException success) {
1448	<	} catch (Exception ex) {
1449	<	unexpectedException();
1450	<	}
1443	>	} catch (IllegalArgumentException success) {}
1444		}
1445
1446		/**
1447	<	* getWaitQueueLength throws IMSE if not locked
1447	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1448		*/
1449	<	public void testGetWaitQueueLengthIMSE() {
1450	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1449	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1450	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1451	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1452	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1453		final Condition c = lock.writeLock().newCondition();
1454		try {
1455		lock.getWaitQueueLength(c);
1456		shouldThrow();
1457	<	} catch (IllegalMonitorStateException success) {
1463	<	} catch (Exception ex) {
1464	<	unexpectedException();
1465	<	}
1457	>	} catch (IllegalMonitorStateException success) {}
1458		}
1459
1468	–
1460		/**
1461	<	* getWaitingThreads throws IAE if not owned
1461	>	* getWaitingThreads throws IllegalArgumentException if not owned
1462		*/
1463	<	public void testGetWaitingThreadsIAE() {
1464	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1463	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1464	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1465	>	public void testGetWaitingThreadsIAE(boolean fair) {
1466	>	final PublicReentrantReadWriteLock lock =
1467	>	new PublicReentrantReadWriteLock(fair);
1468		final Condition c = lock.writeLock().newCondition();
1469	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1469	>	final PublicReentrantReadWriteLock lock2 =
1470	>	new PublicReentrantReadWriteLock(fair);
1471		try {
1472		lock2.getWaitingThreads(c);
1473		shouldThrow();
1474	<	} catch (IllegalArgumentException success) {
1480	<	} catch (Exception ex) {
1481	<	unexpectedException();
1482	<	}
1474	>	} catch (IllegalArgumentException success) {}
1475		}
1476
1477		/**
1478	<	* getWaitingThreads throws IMSE if not locked
1478	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1479		*/
1480	<	public void testGetWaitingThreadsIMSE() {
1481	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1480	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1481	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1482	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1483	>	final PublicReentrantReadWriteLock lock =
1484	>	new PublicReentrantReadWriteLock(fair);
1485		final Condition c = lock.writeLock().newCondition();
1486		try {
1487		lock.getWaitingThreads(c);
1488		shouldThrow();
1489	<	} catch (IllegalMonitorStateException success) {
1495	<	} catch (Exception ex) {
1496	<	unexpectedException();
1497	<	}
1489	>	} catch (IllegalMonitorStateException success) {}
1490		}
1491
1500	–
1492		/**
1493		* hasWaiters returns true when a thread is waiting, else false
1494		*/
1495	<	public void testHasWaiters() {
1496	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1495	>	public void testHasWaiters()      { testHasWaiters(false); }
1496	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1497	>	public void testHasWaiters(boolean fair) {
1498	>	final PublicReentrantReadWriteLock lock =
1499	>	new PublicReentrantReadWriteLock(fair);
1500		final Condition c = lock.writeLock().newCondition();
1501	<	Thread t = new Thread(new Runnable() {
1502	<	public void run() {
1503	<	try {
1504	<	lock.writeLock().lock();
1505	<	threadAssertFalse(lock.hasWaiters(c));
1506	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1507	<	c.await();
1508	<	lock.writeLock().unlock();
1509	<	}
1510	<	catch (InterruptedException e) {
1511	<	threadUnexpectedException();
1512	<	}
1519	<	}
1520	<	});
1501	>	final CountDownLatch locked = new CountDownLatch(1);
1502	>	Thread t = newStartedThread(new CheckedRunnable() {
1503	>	public void realRun() throws InterruptedException {
1504	>	lock.writeLock().lock();
1505	>	assertHasNoWaiters(lock, c);
1506	>	assertFalse(lock.hasWaiters(c));
1507	>	locked.countDown();
1508	>	c.await();
1509	>	assertHasNoWaiters(lock, c);
1510	>	assertFalse(lock.hasWaiters(c));
1511	>	lock.writeLock().unlock();
1512	>	}});
1513
1514	<	try {
1515	<	t.start();
1516	<	Thread.sleep(SHORT_DELAY_MS);
1517	<	lock.writeLock().lock();
1518	<	assertTrue(lock.hasWaiters(c));
1519	<	assertEquals(1, lock.getWaitQueueLength(c));
1520	<	c.signal();
1521	<	lock.writeLock().unlock();
1522	<	Thread.sleep(SHORT_DELAY_MS);
1523	<	lock.writeLock().lock();
1532	<	assertFalse(lock.hasWaiters(c));
1533	<	assertEquals(0, lock.getWaitQueueLength(c));
1534	<	lock.writeLock().unlock();
1535	<	t.join(SHORT_DELAY_MS);
1536	<	assertFalse(t.isAlive());
1537	<	}
1538	<	catch (Exception ex) {
1539	<	unexpectedException();
1540	<	}
1514	>	await(locked);
1515	>	lock.writeLock().lock();
1516	>	assertHasWaiters(lock, c, t);
1517	>	assertTrue(lock.hasWaiters(c));
1518	>	c.signal();
1519	>	assertHasNoWaiters(lock, c);
1520	>	assertFalse(lock.hasWaiters(c));
1521	>	lock.writeLock().unlock();
1522	>	awaitTermination(t);
1523	>	assertHasNoWaiters(lock, c);
1524		}
1525
1526		/**
1527		* getWaitQueueLength returns number of waiting threads
1528		*/
1529	<	public void testGetWaitQueueLength() {
1530	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1529	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1530	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1531	>	public void testGetWaitQueueLength(boolean fair) {
1532	>	final PublicReentrantReadWriteLock lock =
1533	>	new PublicReentrantReadWriteLock(fair);
1534		final Condition c = lock.writeLock().newCondition();
1535	<	Thread t = new Thread(new Runnable() {
1536	<	public void run() {
1537	<	try {
1538	<	lock.writeLock().lock();
1539	<	threadAssertFalse(lock.hasWaiters(c));
1540	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1541	<	c.await();
1542	<	lock.writeLock().unlock();
1543	<	}
1558	<	catch (InterruptedException e) {
1559	<	threadUnexpectedException();
1560	<	}
1561	<	}
1562	<	});
1535	>	final CountDownLatch locked = new CountDownLatch(1);
1536	>	Thread t = newStartedThread(new CheckedRunnable() {
1537	>	public void realRun() throws InterruptedException {
1538	>	lock.writeLock().lock();
1539	>	assertEquals(0, lock.getWaitQueueLength(c));
1540	>	locked.countDown();
1541	>	c.await();
1542	>	lock.writeLock().unlock();
1543	>	}});
1544
1545	<	try {
1546	<	t.start();
1547	<	Thread.sleep(SHORT_DELAY_MS);
1548	<	lock.writeLock().lock();
1549	<	assertTrue(lock.hasWaiters(c));
1550	<	assertEquals(1, lock.getWaitQueueLength(c));
1551	<	c.signal();
1552	<	lock.writeLock().unlock();
1553	<	Thread.sleep(SHORT_DELAY_MS);
1573	<	lock.writeLock().lock();
1574	<	assertFalse(lock.hasWaiters(c));
1575	<	assertEquals(0, lock.getWaitQueueLength(c));
1576	<	lock.writeLock().unlock();
1577	<	t.join(SHORT_DELAY_MS);
1578	<	assertFalse(t.isAlive());
1579	<	}
1580	<	catch (Exception ex) {
1581	<	unexpectedException();
1582	<	}
1545	>	await(locked);
1546	>	lock.writeLock().lock();
1547	>	assertHasWaiters(lock, c, t);
1548	>	assertEquals(1, lock.getWaitQueueLength(c));
1549	>	c.signal();
1550	>	assertHasNoWaiters(lock, c);
1551	>	assertEquals(0, lock.getWaitQueueLength(c));
1552	>	lock.writeLock().unlock();
1553	>	awaitTermination(t);
1554		}
1555
1585	–
1556		/**
1557		* getWaitingThreads returns only and all waiting threads
1558		*/
1559	<	public void testGetWaitingThreads() {
1560	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1559	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1560	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1561	>	public void testGetWaitingThreads(boolean fair) {
1562	>	final PublicReentrantReadWriteLock lock =
1563	>	new PublicReentrantReadWriteLock(fair);
1564		final Condition c = lock.writeLock().newCondition();
1565	<	Thread t1 = new Thread(new Runnable() {
1566	<	public void run() {
1567	<	try {
1568	<	lock.writeLock().lock();
1569	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1570	<	c.await();
1571	<	lock.writeLock().unlock();
1572	<	}
1573	<	catch (InterruptedException e) {
1574	<	threadUnexpectedException();
1602	<	}
1603	<	}
1604	<	});
1605	<
1606	<	Thread t2 = new Thread(new Runnable() {
1607	<	public void run() {
1608	<	try {
1609	<	lock.writeLock().lock();
1610	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1611	<	c.await();
1612	<	lock.writeLock().unlock();
1613	<	}
1614	<	catch (InterruptedException e) {
1615	<	threadUnexpectedException();
1616	<	}
1617	<	}
1618	<	});
1565	>	final CountDownLatch locked1 = new CountDownLatch(1);
1566	>	final CountDownLatch locked2 = new CountDownLatch(1);
1567	>	Thread t1 = new Thread(new CheckedRunnable() {
1568	>	public void realRun() throws InterruptedException {
1569	>	lock.writeLock().lock();
1570	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1571	>	locked1.countDown();
1572	>	c.await();
1573	>	lock.writeLock().unlock();
1574	>	}});
1575
1576	<	try {
1577	<	lock.writeLock().lock();
1578	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1579	<	lock.writeLock().unlock();
1580	<	t1.start();
1581	<	Thread.sleep(SHORT_DELAY_MS);
1582	<	t2.start();
1583	<	Thread.sleep(SHORT_DELAY_MS);
1584	<	lock.writeLock().lock();
1585	<	assertTrue(lock.hasWaiters(c));
1586	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1587	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1588	<	c.signalAll();
1589	<	lock.writeLock().unlock();
1590	<	Thread.sleep(SHORT_DELAY_MS);
1591	<	lock.writeLock().lock();
1592	<	assertFalse(lock.hasWaiters(c));
1593	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1594	<	lock.writeLock().unlock();
1595	<	t1.join(SHORT_DELAY_MS);
1596	<	t2.join(SHORT_DELAY_MS);
1597	<	assertFalse(t1.isAlive());
1598	<	assertFalse(t2.isAlive());
1599	<	}
1600	<	catch (Exception ex) {
1601	<	unexpectedException();
1602	<	}
1576	>	Thread t2 = new Thread(new CheckedRunnable() {
1577	>	public void realRun() throws InterruptedException {
1578	>	lock.writeLock().lock();
1579	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1580	>	locked2.countDown();
1581	>	c.await();
1582	>	lock.writeLock().unlock();
1583	>	}});
1584	>
1585	>	lock.writeLock().lock();
1586	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1587	>	lock.writeLock().unlock();
1588	>
1589	>	t1.start();
1590	>	await(locked1);
1591	>	t2.start();
1592	>	await(locked2);
1593	>
1594	>	lock.writeLock().lock();
1595	>	assertTrue(lock.hasWaiters(c));
1596	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1597	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1598	>	assertEquals(2, lock.getWaitingThreads(c).size());
1599	>	c.signalAll();
1600	>	assertHasNoWaiters(lock, c);
1601	>	lock.writeLock().unlock();
1602	>
1603	>	awaitTermination(t1);
1604	>	awaitTermination(t2);
1605	>
1606	>	assertHasNoWaiters(lock, c);
1607		}
1608
1609		/**
1610		* toString indicates current lock state
1611		*/
1612	<	public void testToString() {
1613	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1612	>	public void testToString()      { testToString(false); }
1613	>	public void testToString_fair() { testToString(true); }
1614	>	public void testToString(boolean fair) {
1615	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1616		String us = lock.toString();
1617		assertTrue(us.indexOf("Write locks = 0") >= 0);
1618		assertTrue(us.indexOf("Read locks = 0") >= 0);
#	Line 1669 | Line 1631 | public class ReentrantReadWriteLockTest
1631		/**
1632		* readLock.toString indicates current lock state
1633		*/
1634	<	public void testReadLockToString() {
1635	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1634	>	public void testReadLockToString()      { testReadLockToString(false); }
1635	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1636	>	public void testReadLockToString(boolean fair) {
1637	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1638		String us = lock.readLock().toString();
1639		assertTrue(us.indexOf("Read locks = 0") >= 0);
1640		lock.readLock().lock();
#	Line 1682 | Line 1646 | public class ReentrantReadWriteLockTest
1646		/**
1647		* writeLock.toString indicates current lock state
1648		*/
1649	<	public void testWriteLockToString() {
1650	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1649	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1650	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1651	>	public void testWriteLockToString(boolean fair) {
1652	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1653		String us = lock.writeLock().toString();
1654		assertTrue(us.indexOf("Unlocked") >= 0);
1655		lock.writeLock().lock();

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