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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.23 by dl, Mon Aug 1 19:53:01 2005 UTC vs.
Revision 1.64 by jsr166, Tue May 24 23:40:14 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56	>	}
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59		}
60	<	public Collection<Thread> getWaitingThreads(Condition c) {
61	<	return super.getWaitingThreads(c);
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62		}
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	<	assertEquals(0, rl.getReadLockCount());
85	<	rl.writeLock().unlock();
86	<	assertFalse(rl.isWriteLocked());
87	<	assertFalse(rl.isWriteLockedByCurrentThread());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.readLock().lock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
95	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	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
90	+	/**
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	<	* locking an unlocked fair lock succeeds
104	<	*/
105	<	public void testFairLock() {
106	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
107	<	rl.writeLock().lock();
108	<	assertTrue(rl.isWriteLocked());
109	<	assertTrue(rl.isWriteLockedByCurrentThread());
110	<	assertEquals(0, rl.getReadLockCount());
111	<	rl.writeLock().unlock();
112	<	assertFalse(rl.isWriteLocked());
113	<	assertFalse(rl.isWriteLockedByCurrentThread());
114	<	assertEquals(0, rl.getReadLockCount());
115	<	rl.readLock().lock();
116	<	assertFalse(rl.isWriteLocked());
118	<	assertFalse(rl.isWriteLockedByCurrentThread());
119	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
103	>	* Checks that lock is write-locked by the given thread.
104	>	*/
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	<	* getWriteHoldCount returns number of recursive holds
120	>	* Checks that lock is write-locked by the current thread.
121		*/
122	<	public void testGetWriteHoldCount() {
123	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
131	<	for(int i = 1; i <= SIZE; i++) {
132	<	lock.writeLock().lock();
133	<	assertEquals(i,lock.getWriteHoldCount());
134	<	}
135	<	for(int i = SIZE; i > 0; i--) {
136	<	lock.writeLock().unlock();
137	<	assertEquals(i-1,lock.getWriteHoldCount());
138	<	}
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();
146	<	for(int i = 1; i <= SIZE; i++) {
147	<	lock.readLock().lock();
148	<	assertEquals(i,lock.getReadHoldCount());
149	<	}
150	<	for(int i = SIZE; i > 0; i--) {
151	<	lock.readLock().unlock();
152	<	assertEquals(i-1,lock.getReadHoldCount());
153	<	}
129	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131		}
155	–
132
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	<	t.interrupt();
169	<	lock.writeLock().unlock();
189	<	t.join();
190	<	} catch(Exception e){
191	<	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	<	}
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();
215	<	}
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	<	t.interrupt();
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();
236	<	} catch(Exception e){
237	<	unexpectedException();
230	>	assertEquals(i-1,lock.getWriteHoldCount());
231		}
232	<	}
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	<	});
255	<	try {
256	<	t.start();
257	<	t.interrupt();
258	<	t.join();
259	<	} catch(Exception e){
260	<	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
264	–
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();
279	<	lock.writeLock().unlock();
280	<	} catch(Exception e){
281	<	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	<	}
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() {
292	<	public void run() {
293	<	threadAssertFalse(lock.readLock().tryLock());
294	<	}
295	<	});
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 {
297	–	t.start();
298	–	t.join();
276		lock.writeLock().unlock();
277	<	} catch(Exception e){
278	<	unexpectedException();
279	<	}
303	<	}
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() {
312	<	public void run() {
313	<	threadAssertTrue(lock.readLock().tryLock());
314	<	lock.readLock().unlock();
315	<	}
316	<	});
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 {
318	–	t.start();
319	–	t.join();
289		lock.readLock().unlock();
290	<	} catch(Exception e){
291	<	unexpectedException();
292	<	}
324	<	}
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() {
339	<	public void run() {
340	<	lock.writeLock().lock();
341	<	lock.writeLock().unlock();
342	<	}
343	<	});
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	<	try {
309	<	t1.start();
310	<	t2.start();
311	<	Thread.sleep(SHORT_DELAY_MS);
312	<	lock.readLock().unlock();
350	<	t1.join(MEDIUM_DELAY_MS);
351	<	t2.join(MEDIUM_DELAY_MS);
352	<	assertTrue(!t1.isAlive());
353	<	assertTrue(!t2.isAlive());
354	<
355	<	} catch(Exception e){
356	<	unexpectedException();
357	<	}
358	<	}
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	<	});
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	<	try {
335	<	t1.start();
336	<	t2.start();
337	<	Thread.sleep(SHORT_DELAY_MS);
338	<	lock.writeLock().unlock();
339	<	t1.join(MEDIUM_DELAY_MS);
340	<	t2.join(MEDIUM_DELAY_MS);
341	<	assertTrue(!t1.isAlive());
342	<	assertTrue(!t2.isAlive());
343	<
344	<	} catch(Exception e){
345	<	unexpectedException();
346	<	}
347	<	}
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	<	}
387	>	releaseWriteLock(lock);
388	>	}
389
390		/**
391	<	* Read lock succeeds if write locked by current thread even if
407	<	* 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() {
419	<	public void run() {
420	<	lock.readLock().lock();
421	<	lock.readLock().unlock();
422	<	}
423	<	});
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();
428	<	lock.readLock().lock();
429	<	lock.readLock().unlock();
430	<	Thread.sleep(SHORT_DELAY_MS);
431	<	lock.readLock().lock();
432	<	lock.readLock().unlock();
433	<	lock.writeLock().unlock();
434	<	t1.join(MEDIUM_DELAY_MS);
435	<	t2.join(MEDIUM_DELAY_MS);
436	<	assertTrue(!t1.isAlive());
437	<	assertTrue(!t2.isAlive());
438	<
439	<	} catch(Exception e){
440	<	unexpectedException();
441	<	}
442	<	}
404	>	awaitTermination(t);
405	>	releaseWriteLock(lock);
406	>	}
407
408		/**
409	<	*  Read lock succeeds if write locked by current thread even if
446	<	* other threads are waiting for writelock
409	>	* read-tryLock fails if locked
410		*/
411	<	public void testReadHoldingWriteLock3() {
412	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
413	<	lock.writeLock().lock();
414	<	Thread t1 = new Thread(new Runnable() {
415	<	public void run() {
416	<	lock.writeLock().lock();
417	<	lock.writeLock().unlock();
418	<	}
419	<	});
420	<	Thread t2 = new Thread(new Runnable() {
458	<	public void run() {
459	<	lock.writeLock().lock();
460	<	lock.writeLock().unlock();
461	<	}
462	<	});
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	<	try {
423	<	t1.start();
424	<	t2.start();
467	<	lock.readLock().lock();
468	<	lock.readLock().unlock();
469	<	Thread.sleep(SHORT_DELAY_MS);
470	<	lock.readLock().lock();
471	<	lock.readLock().unlock();
472	<	lock.writeLock().unlock();
473	<	t1.join(MEDIUM_DELAY_MS);
474	<	t2.join(MEDIUM_DELAY_MS);
475	<	assertTrue(!t1.isAlive());
476	<	assertTrue(!t2.isAlive());
477	<
478	<	} catch(Exception e){
479	<	unexpectedException();
480	<	}
481	<	}
422	>	awaitTermination(t);
423	>	releaseWriteLock(lock);
424	>	}
425
426	+	/**
427	+	* Multiple threads can hold a read lock when not write-locked
428	+	*/
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	+	awaitTermination(t);
445	+	lock.readLock().unlock();
446	+	}
447
448		/**
449	<	*  Write lock succeeds if write locked by current thread even if
486	<	* other threads are waiting for writelock
449	>	* A writelock succeeds only after a reading thread unlocks
450		*/
451	<	public void testWriteHoldingWriteLock4() {
452	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
453	<	lock.writeLock().lock();
454	<	Thread t1 = new Thread(new Runnable() {
455	<	public void run() {
456	<	lock.writeLock().lock();
457	<	lock.writeLock().unlock();
458	<	}
459	<	});
460	<	Thread t2 = new Thread(new Runnable() {
461	<	public void run() {
462	<	lock.writeLock().lock();
463	<	lock.writeLock().unlock();
464	<	}
465	<	});
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	<	try {
474	<	t1.start();
475	<	t2.start();
476	<	lock.writeLock().lock();
477	<	lock.writeLock().unlock();
478	<	Thread.sleep(SHORT_DELAY_MS);
479	<	lock.writeLock().lock();
480	<	lock.writeLock().unlock();
481	<	lock.writeLock().unlock();
482	<	t1.join(MEDIUM_DELAY_MS);
483	<	t2.join(MEDIUM_DELAY_MS);
484	<	assertTrue(!t1.isAlive());
485	<	assertTrue(!t2.isAlive());
486	<
487	<	} catch(Exception e){
488	<	unexpectedException();
489	<	}
490	<	}
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	>	* 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 testReaderWriterReaderFairFifo() {
513	>	final PublicReentrantReadWriteLock lock =
514	>	new PublicReentrantReadWriteLock(true);
515	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
516	>
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	+	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	<	}
584	>	}
585
586		/**
587	<	* Fair Read lock succeeds if write locked by current thread even if
588	<	* other threads are waiting for readlock
587	>	* Read trylock succeeds (barging) even in the presence of waiting
588	>	* readers and/or writers
589		*/
590	<	public void testReadHoldingWriteLockFair2() {
591	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
592	<	lock.writeLock().lock();
593	<	Thread t1 = new Thread(new Runnable() {
594	<	public void run() {
595	<	lock.readLock().lock();
545	<	lock.readLock().unlock();
546	<	}
547	<	});
548	<	Thread t2 = new Thread(new Runnable() {
549	<	public void run() {
550	<	lock.readLock().lock();
551	<	lock.readLock().unlock();
552	<	}
553	<	});
590	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
591	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
592	>	public void testReadTryLockBarging(boolean fair) {
593	>	final PublicReentrantReadWriteLock lock =
594	>	new PublicReentrantReadWriteLock(fair);
595	>	lock.readLock().lock();
596
597	<	try {
598	<	t1.start();
599	<	t2.start();
600	<	lock.readLock().lock();
601	<	lock.readLock().unlock();
602	<	Thread.sleep(SHORT_DELAY_MS);
603	<	lock.readLock().lock();
604	<	lock.readLock().unlock();
605	<	lock.writeLock().unlock();
606	<	t1.join(MEDIUM_DELAY_MS);
607	<	t2.join(MEDIUM_DELAY_MS);
608	<	assertTrue(!t1.isAlive());
609	<	assertTrue(!t2.isAlive());
610	<
611	<	} catch(Exception e){
612	<	unexpectedException();
613	<	}
614	<	}
597	>	Thread t1 = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	lock.writeLock().lock();
600	>	lock.writeLock().unlock();
601	>	}});
602	>
603	>	waitForQueuedThread(lock, t1);
604	>
605	>	Thread t2 = newStartedThread(new CheckedRunnable() {
606	>	public void realRun() {
607	>	lock.readLock().lock();
608	>	lock.readLock().unlock();
609	>	}});
610	>
611	>	if (fair)
612	>	waitForQueuedThread(lock, t2);
613	>
614	>	Thread t3 = newStartedThread(new CheckedRunnable() {
615	>	public void realRun() {
616	>	lock.readLock().tryLock();
617	>	lock.readLock().unlock();
618	>	}});
619	>
620	>	assertTrue(lock.getReadLockCount() > 0);
621	>	awaitTermination(t3);
622	>	assertTrue(t1.isAlive());
623	>	if (fair) assertTrue(t2.isAlive());
624	>	lock.readLock().unlock();
625	>	awaitTermination(t1);
626	>	awaitTermination(t2);
627	>	}
628	>
629	>	/**
630	>	* Read lock succeeds if write locked by current thread even if
631	>	* other threads are waiting for readlock
632	>	*/
633	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
634	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
635	>	public void testReadHoldingWriteLock2(boolean fair) {
636	>	final PublicReentrantReadWriteLock lock =
637	>	new PublicReentrantReadWriteLock(fair);
638	>	lock.writeLock().lock();
639	>	lock.readLock().lock();
640	>	lock.readLock().unlock();
641
642	+	Thread t1 = newStartedThread(new CheckedRunnable() {
643	+	public void realRun() {
644	+	lock.readLock().lock();
645	+	lock.readLock().unlock();
646	+	}});
647	+	Thread t2 = newStartedThread(new CheckedRunnable() {
648	+	public void realRun() {
649	+	lock.readLock().lock();
650	+	lock.readLock().unlock();
651	+	}});
652	+
653	+	waitForQueuedThread(lock, t1);
654	+	waitForQueuedThread(lock, t2);
655	+	assertWriteLockedByMoi(lock);
656	+	lock.readLock().lock();
657	+	lock.readLock().unlock();
658	+	releaseWriteLock(lock);
659	+	awaitTermination(t1);
660	+	awaitTermination(t2);
661	+	}
662
663		/**
664	<	* Fair Read lock succeeds if write locked by current thread even if
664	>	* Read lock succeeds if write locked by current thread even if
665		* other threads are waiting for writelock
666		*/
667	<	public void testReadHoldingWriteLockFair3() {
668	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
669	<	lock.writeLock().lock();
670	<	Thread t1 = new Thread(new Runnable() {
671	<	public void run() {
672	<	lock.writeLock().lock();
673	<	lock.writeLock().unlock();
674	<	}
587	<	});
588	<	Thread t2 = new Thread(new Runnable() {
589	<	public void run() {
590	<	lock.writeLock().lock();
591	<	lock.writeLock().unlock();
592	<	}
593	<	});
667	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
668	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
669	>	public void testReadHoldingWriteLock3(boolean fair) {
670	>	final PublicReentrantReadWriteLock lock =
671	>	new PublicReentrantReadWriteLock(fair);
672	>	lock.writeLock().lock();
673	>	lock.readLock().lock();
674	>	lock.readLock().unlock();
675
676	<	try {
677	<	t1.start();
678	<	t2.start();
679	<	lock.readLock().lock();
680	<	lock.readLock().unlock();
681	<	Thread.sleep(SHORT_DELAY_MS);
682	<	lock.readLock().lock();
683	<	lock.readLock().unlock();
684	<	lock.writeLock().unlock();
685	<	t1.join(MEDIUM_DELAY_MS);
605	<	t2.join(MEDIUM_DELAY_MS);
606	<	assertTrue(!t1.isAlive());
607	<	assertTrue(!t2.isAlive());
608	<
609	<	} catch(Exception e){
610	<	unexpectedException();
611	<	}
612	<	}
676	>	Thread t1 = newStartedThread(new CheckedRunnable() {
677	>	public void realRun() {
678	>	lock.writeLock().lock();
679	>	lock.writeLock().unlock();
680	>	}});
681	>	Thread t2 = newStartedThread(new CheckedRunnable() {
682	>	public void realRun() {
683	>	lock.writeLock().lock();
684	>	lock.writeLock().unlock();
685	>	}});
686
687	+	waitForQueuedThread(lock, t1);
688	+	waitForQueuedThread(lock, t2);
689	+	assertWriteLockedByMoi(lock);
690	+	lock.readLock().lock();
691	+	lock.readLock().unlock();
692	+	assertWriteLockedByMoi(lock);
693	+	lock.writeLock().unlock();
694	+	awaitTermination(t1);
695	+	awaitTermination(t2);
696	+	}
697
698		/**
699	<	* Fair Write lock succeeds if write locked by current thread even if
699	>	* Write lock succeeds if write locked by current thread even if
700		* other threads are waiting for writelock
701		*/
702	<	public void testWriteHoldingWriteLockFair4() {
703	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
704	<	lock.writeLock().lock();
705	<	Thread t1 = new Thread(new Runnable() {
706	<	public void run() {
707	<	lock.writeLock().lock();
708	<	lock.writeLock().unlock();
709	<	}
627	<	});
628	<	Thread t2 = new Thread(new Runnable() {
629	<	public void run() {
630	<	lock.writeLock().lock();
631	<	lock.writeLock().unlock();
632	<	}
633	<	});
702	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
703	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
704	>	public void testWriteHoldingWriteLock4(boolean fair) {
705	>	final PublicReentrantReadWriteLock lock =
706	>	new PublicReentrantReadWriteLock(fair);
707	>	lock.writeLock().lock();
708	>	lock.writeLock().lock();
709	>	lock.writeLock().unlock();
710
711	<	try {
712	<	t1.start();
713	<	t2.start();
714	<	Thread.sleep(SHORT_DELAY_MS);
715	<	assertTrue(lock.isWriteLockedByCurrentThread());
716	<	assertTrue(lock.getWriteHoldCount() == 1);
717	<	lock.writeLock().lock();
718	<	assertTrue(lock.getWriteHoldCount() == 2);
719	<	lock.writeLock().unlock();
720	<	lock.writeLock().lock();
645	<	lock.writeLock().unlock();
646	<	lock.writeLock().unlock();
647	<	t1.join(MEDIUM_DELAY_MS);
648	<	t2.join(MEDIUM_DELAY_MS);
649	<	assertTrue(!t1.isAlive());
650	<	assertTrue(!t2.isAlive());
651	<
652	<	} catch(Exception e){
653	<	unexpectedException();
654	<	}
655	<	}
711	>	Thread t1 = newStartedThread(new CheckedRunnable() {
712	>	public void realRun() {
713	>	lock.writeLock().lock();
714	>	lock.writeLock().unlock();
715	>	}});
716	>	Thread t2 = newStartedThread(new CheckedRunnable() {
717	>	public void realRun() {
718	>	lock.writeLock().lock();
719	>	lock.writeLock().unlock();
720	>	}});
721
722	+	waitForQueuedThread(lock, t1);
723	+	waitForQueuedThread(lock, t2);
724	+	assertWriteLockedByMoi(lock);
725	+	assertEquals(1, lock.getWriteHoldCount());
726	+	lock.writeLock().lock();
727	+	assertWriteLockedByMoi(lock);
728	+	assertEquals(2, lock.getWriteHoldCount());
729	+	lock.writeLock().unlock();
730	+	assertWriteLockedByMoi(lock);
731	+	assertEquals(1, lock.getWriteHoldCount());
732	+	lock.writeLock().unlock();
733	+	awaitTermination(t1);
734	+	awaitTermination(t2);
735	+	}
736
737		/**
738		* Read tryLock succeeds if readlocked but not writelocked
739		*/
740	<	public void testTryLockWhenReadLocked() {
741	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
742	<	lock.readLock().lock();
743	<	Thread t = new Thread(new Runnable() {
744	<	public void run() {
745	<	threadAssertTrue(lock.readLock().tryLock());
746	<	lock.readLock().unlock();
747	<	}
748	<	});
749	<	try {
671	<	t.start();
672	<	t.join();
673	<	lock.readLock().unlock();
674	<	} catch(Exception e){
675	<	unexpectedException();
676	<	}
677	<	}
740	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
741	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
742	>	public void testTryLockWhenReadLocked(boolean fair) {
743	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
744	>	lock.readLock().lock();
745	>	Thread t = newStartedThread(new CheckedRunnable() {
746	>	public void realRun() {
747	>	assertTrue(lock.readLock().tryLock());
748	>	lock.readLock().unlock();
749	>	}});
750
751	<
751	>	awaitTermination(t);
752	>	lock.readLock().unlock();
753	>	}
754
755		/**
756		* write tryLock fails when readlocked
757		*/
758	<	public void testWriteTryLockWhenReadLocked() {
759	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
760	<	lock.readLock().lock();
761	<	Thread t = new Thread(new Runnable() {
762	<	public void run() {
763	<	threadAssertFalse(lock.writeLock().tryLock());
764	<	}
765	<	});
766	<	try {
693	<	t.start();
694	<	t.join();
695	<	lock.readLock().unlock();
696	<	} catch(Exception e){
697	<	unexpectedException();
698	<	}
699	<	}
758	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
759	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
760	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
761	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
762	>	lock.readLock().lock();
763	>	Thread t = newStartedThread(new CheckedRunnable() {
764	>	public void realRun() {
765	>	assertFalse(lock.writeLock().tryLock());
766	>	}});
767
768	<
768	>	awaitTermination(t);
769	>	lock.readLock().unlock();
770	>	}
771
772		/**
773		* write timed tryLock times out if locked
774		*/
775	<	public void testWriteTryLock_Timeout() {
776	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
777	<	lock.writeLock().lock();
778	<	Thread t = new Thread(new Runnable() {
779	<	public void run() {
780	<	try {
781	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
782	<	} catch (Exception ex) {
783	<	threadUnexpectedException();
784	<	}
785	<	}
786	<	});
787	<	try {
788	<	t.start();
789	<	t.join();
790	<	lock.writeLock().unlock();
791	<	} catch(Exception e){
723	<	unexpectedException();
724	<	}
725	<	}
775	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
776	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
777	>	public void testWriteTryLock_Timeout(boolean fair) {
778	>	final PublicReentrantReadWriteLock lock =
779	>	new PublicReentrantReadWriteLock(fair);
780	>	lock.writeLock().lock();
781	>	Thread t = newStartedThread(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	long startTime = System.nanoTime();
784	>	long timeoutMillis = 10;
785	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
786	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
787	>	}});
788	>
789	>	awaitTermination(t);
790	>	releaseWriteLock(lock);
791	>	}
792
793		/**
794		* read timed tryLock times out if write-locked
795		*/
796	<	public void testReadTryLock_Timeout() {
797	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
798	<	lock.writeLock().lock();
799	<	Thread t = new Thread(new Runnable() {
800	<	public void run() {
801	<	try {
802	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
803	<	} catch (Exception ex) {
804	<	threadUnexpectedException();
805	<	}
806	<	}
807	<	});
742	<	try {
743	<	t.start();
744	<	t.join();
745	<	lock.writeLock().unlock();
746	<	} catch(Exception e){
747	<	unexpectedException();
748	<	}
749	<	}
796	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
797	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
798	>	public void testReadTryLock_Timeout(boolean fair) {
799	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
800	>	lock.writeLock().lock();
801	>	Thread t = newStartedThread(new CheckedRunnable() {
802	>	public void realRun() throws InterruptedException {
803	>	long startTime = System.nanoTime();
804	>	long timeoutMillis = 10;
805	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
806	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
807	>	}});
808
809	+	awaitTermination(t);
810	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
811	+	lock.writeLock().unlock();
812	+	}
813
814		/**
815	<	* write lockInterruptibly succeeds if lock free else is interruptible
815	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
816		*/
817	<	public void testWriteLockInterruptibly() {
818	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819	<	try {
820	<	lock.writeLock().lockInterruptibly();
821	<	} catch(Exception e) {
760	<	unexpectedException();
761	<	}
762	<	Thread t = new Thread(new Runnable() {
763	<	public void run() {
764	<	try {
765	<	lock.writeLock().lockInterruptibly();
766	<	threadShouldThrow();
767	<	}
768	<	catch(InterruptedException success) {
769	<	}
770	<	}
771	<	});
817	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
818	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
819	>	public void testWriteLockInterruptibly(boolean fair) {
820	>	final PublicReentrantReadWriteLock lock =
821	>	new PublicReentrantReadWriteLock(fair);
822		try {
823	<	t.start();
824	<	t.interrupt();
825	<	t.join();
776	<	lock.writeLock().unlock();
777	<	} catch(Exception e){
778	<	unexpectedException();
823	>	lock.writeLock().lockInterruptibly();
824	>	} catch (InterruptedException ie) {
825	>	threadUnexpectedException(ie);
826		}
827	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
828	+	public void realRun() throws InterruptedException {
829	+	lock.writeLock().lockInterruptibly();
830	+	}});
831	+
832	+	waitForQueuedThread(lock, t);
833	+	t.interrupt();
834	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
835	+	awaitTermination(t);
836	+	releaseWriteLock(lock);
837		}
838
839		/**
840	<	*  read lockInterruptibly succeeds if lock free else is interruptible
840	>	* read lockInterruptibly succeeds if lock free else is interruptible
841		*/
842	<	public void testReadLockInterruptibly() {
843	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	<	try {
845	<	lock.writeLock().lockInterruptibly();
846	<	} catch(Exception e) {
790	<	unexpectedException();
791	<	}
792	<	Thread t = new Thread(new Runnable() {
793	<	public void run() {
794	<	try {
795	<	lock.readLock().lockInterruptibly();
796	<	threadShouldThrow();
797	<	}
798	<	catch(InterruptedException success) {
799	<	}
800	<	}
801	<	});
842	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
843	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
844	>	public void testReadLockInterruptibly(boolean fair) {
845	>	final PublicReentrantReadWriteLock lock =
846	>	new PublicReentrantReadWriteLock(fair);
847		try {
848	<	t.start();
849	<	t.interrupt();
850	<	t.join();
851	<	lock.writeLock().unlock();
852	<	} catch(Exception e){
808	<	unexpectedException();
848	>	lock.readLock().lockInterruptibly();
849	>	lock.readLock().unlock();
850	>	lock.writeLock().lockInterruptibly();
851	>	} catch (InterruptedException ie) {
852	>	threadUnexpectedException(ie);
853		}
854	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
855	+	public void realRun() throws InterruptedException {
856	+	lock.readLock().lockInterruptibly();
857	+	}});
858	+
859	+	waitForQueuedThread(lock, t);
860	+	t.interrupt();
861	+	awaitTermination(t);
862	+	releaseWriteLock(lock);
863		}
864
865		/**
866		* Calling await without holding lock throws IllegalMonitorStateException
867		*/
868	<	public void testAwait_IllegalMonitor() {
869	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
869	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
870	>	public void testAwait_IMSE(boolean fair) {
871	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
872		final Condition c = lock.writeLock().newCondition();
873	<	try {
874	<	c.await();
875	<	shouldThrow();
876	<	}
877	<	catch (IllegalMonitorStateException success) {
878	<	}
879	<	catch (Exception ex) {
880	<	shouldThrow();
873	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
874	>	long startTime = System.nanoTime();
875	>	try {
876	>	await(c, awaitMethod);
877	>	shouldThrow();
878	>	} catch (IllegalMonitorStateException success) {
879	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
880	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
881		}
882		}
883
884		/**
885		* Calling signal without holding lock throws IllegalMonitorStateException
886		*/
887	<	public void testSignal_IllegalMonitor() {
888	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
887	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
888	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
889	>	public void testSignal_IMSE(boolean fair) {
890	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
891		final Condition c = lock.writeLock().newCondition();
892		try {
893		c.signal();
894		shouldThrow();
895	<	}
839	<	catch (IllegalMonitorStateException success) {
840	<	}
841	<	catch (Exception ex) {
842	<	unexpectedException();
843	<	}
895	>	} catch (IllegalMonitorStateException success) {}
896		}
897
898		/**
899	<	* awaitNanos without a signal times out
899	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
900		*/
901	<	public void testAwaitNanos_Timeout() {
902	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
901	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
902	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
903	>	public void testSignalAll_IMSE(boolean fair) {
904	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
905		final Condition c = lock.writeLock().newCondition();
906		try {
907	+	c.signalAll();
908	+	shouldThrow();
909	+	} catch (IllegalMonitorStateException success) {}
910	+	}
911	+
912	+	/**
913	+	* awaitNanos without a signal times out
914	+	*/
915	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
916	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
917	+	public void testAwaitNanos_Timeout(boolean fair) {
918	+	try {
919	+	final ReentrantReadWriteLock lock =
920	+	new ReentrantReadWriteLock(fair);
921	+	final Condition c = lock.writeLock().newCondition();
922		lock.writeLock().lock();
923	<	long t = c.awaitNanos(100);
924	<	assertTrue(t <= 0);
923	>	long startTime = System.nanoTime();
924	>	long timeoutMillis = 10;
925	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
926	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
927	>	assertTrue(nanosRemaining <= 0);
928	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
929		lock.writeLock().unlock();
930	<	}
931	<	catch (Exception ex) {
859	<	unexpectedException();
930	>	} catch (InterruptedException e) {
931	>	threadUnexpectedException(e);
932		}
933		}
934
863	–
935		/**
936	<	*  timed await without a signal times out
936	>	* timed await without a signal times out
937		*/
938	<	public void testAwait_Timeout() {
939	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
940	<	final Condition c = lock.writeLock().newCondition();
938	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
939	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
940	>	public void testAwait_Timeout(boolean fair) {
941		try {
942	+	final ReentrantReadWriteLock lock =
943	+	new ReentrantReadWriteLock(fair);
944	+	final Condition c = lock.writeLock().newCondition();
945		lock.writeLock().lock();
946	+	long startTime = System.nanoTime();
947	+	long timeoutMillis = 10;
948	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
949	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
950		lock.writeLock().unlock();
951	<	}
952	<	catch (Exception ex) {
875	<	unexpectedException();
951	>	} catch (InterruptedException e) {
952	>	threadUnexpectedException(e);
953		}
954		}
955
956		/**
957		* awaitUntil without a signal times out
958		*/
959	<	public void testAwaitUntil_Timeout() {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
961	<	final Condition c = lock.writeLock().newCondition();
962	<	try {
959	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
960	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
961	>	public void testAwaitUntil_Timeout(boolean fair) {
962	>	try {
963	>	final ReentrantReadWriteLock lock =
964	>	new ReentrantReadWriteLock(fair);
965	>	final Condition c = lock.writeLock().newCondition();
966		lock.writeLock().lock();
967	+	long startTime = System.nanoTime();
968	+	long timeoutMillis = 10;
969		java.util.Date d = new java.util.Date();
970	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
971	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
972		lock.writeLock().unlock();
973	<	}
974	<	catch (Exception ex) {
891	<	unexpectedException();
973	>	} catch (InterruptedException e) {
974	>	threadUnexpectedException(e);
975		}
976		}
977
978		/**
979		* await returns when signalled
980		*/
981	<	public void testAwait() {
982	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
981	>	public void testAwait()      { testAwait(false); }
982	>	public void testAwait_fair() { testAwait(true); }
983	>	public void testAwait(boolean fair) {
984	>	final PublicReentrantReadWriteLock lock =
985	>	new PublicReentrantReadWriteLock(fair);
986		final Condition c = lock.writeLock().newCondition();
987	<	Thread t = new Thread(new Runnable() {
988	<	public void run() {
989	<	try {
990	<	lock.writeLock().lock();
991	<	c.await();
992	<	lock.writeLock().unlock();
993	<	}
994	<	catch(InterruptedException e) {
909	<	threadUnexpectedException();
910	<	}
911	<	}
912	<	});
913	<
914	<	try {
915	<	t.start();
916	<	Thread.sleep(SHORT_DELAY_MS);
917	<	lock.writeLock().lock();
918	<	c.signal();
919	<	lock.writeLock().unlock();
920	<	t.join(SHORT_DELAY_MS);
921	<	assertFalse(t.isAlive());
922	<	}
923	<	catch (Exception ex) {
924	<	unexpectedException();
925	<	}
926	<	}
987	>	final CountDownLatch locked = new CountDownLatch(1);
988	>	Thread t = newStartedThread(new CheckedRunnable() {
989	>	public void realRun() throws InterruptedException {
990	>	lock.writeLock().lock();
991	>	locked.countDown();
992	>	c.await();
993	>	lock.writeLock().unlock();
994	>	}});
995
996	<	/** A helper class for uninterruptible wait tests */
997	<	class UninterruptableThread extends Thread {
998	<	private Lock lock;
999	<	private Condition c;
1000	<
1001	<	public volatile boolean canAwake = false;
1002	<	public volatile boolean interrupted = false;
1003	<	public volatile boolean lockStarted = false;
936	<
937	<	public UninterruptableThread(Lock lock, Condition c) {
938	<	this.lock = lock;
939	<	this.c = c;
940	<	}
941	<
942	<	public synchronized void run() {
943	<	lock.lock();
944	<	lockStarted = true;
945	<
946	<	while (!canAwake) {
947	<	c.awaitUninterruptibly();
948	<	}
949	<
950	<	interrupted = isInterrupted();
951	<	lock.unlock();
952	<	}
996	>	await(locked);
997	>	lock.writeLock().lock();
998	>	assertHasWaiters(lock, c, t);
999	>	c.signal();
1000	>	assertHasNoWaiters(lock, c);
1001	>	assertTrue(t.isAlive());
1002	>	lock.writeLock().unlock();
1003	>	awaitTermination(t);
1004		}
1005
1006		/**
1007		* awaitUninterruptibly doesn't abort on interrupt
1008		*/
1009	<	public void testAwaitUninterruptibly() {
1010	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1009	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1010	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1011	>	public void testAwaitUninterruptibly(boolean fair) {
1012	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1013		final Condition c = lock.writeLock().newCondition();
1014	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1015	<
1016	<	try {
1017	<	thread.start();
1018	<
1019	<	while (!thread.lockStarted) {
1020	<	Thread.sleep(100);
968	<	}
969	<
970	<	lock.writeLock().lock();
971	<	try {
972	<	thread.interrupt();
973	<	thread.canAwake = true;
974	<	c.signal();
975	<	} finally {
1014	>	final CountDownLatch locked = new CountDownLatch(1);
1015	>	Thread t = newStartedThread(new CheckedRunnable() {
1016	>	public void realRun() {
1017	>	lock.writeLock().lock();
1018	>	locked.countDown();
1019	>	c.awaitUninterruptibly();
1020	>	assertTrue(Thread.interrupted());
1021		lock.writeLock().unlock();
1022	<	}
1022	>	}});
1023
1024	<	thread.join();
1025	<	assertTrue(thread.interrupted);
1026	<	assertFalse(thread.isAlive());
1027	<	} catch (Exception ex) {
1028	<	unexpectedException();
1029	<	}
1024	>	await(locked);
1025	>	lock.writeLock().lock();
1026	>	lock.writeLock().unlock();
1027	>	t.interrupt();
1028	>	long timeoutMillis = 10;
1029	>	assertThreadStaysAlive(t, timeoutMillis);
1030	>	lock.writeLock().lock();
1031	>	c.signal();
1032	>	lock.writeLock().unlock();
1033	>	awaitTermination(t);
1034		}
1035
1036		/**
1037	<	* await is interruptible
1037	>	* await/awaitNanos/awaitUntil is interruptible
1038		*/
1039	<	public void testAwait_Interrupt() {
1040	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1039	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1040	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1041	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1042	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1043	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1044	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1045	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1046	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1047	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1048	>	final PublicReentrantReadWriteLock lock =
1049	>	new PublicReentrantReadWriteLock(fair);
1050		final Condition c = lock.writeLock().newCondition();
1051	<	Thread t = new Thread(new Runnable() {
1052	<	public void run() {
1053	<	try {
1054	<	lock.writeLock().lock();
1055	<	c.await();
1056	<	lock.writeLock().unlock();
1057	<	threadShouldThrow();
1058	<	}
1059	<	catch(InterruptedException success) {
1060	<	}
1061	<	}
1062	<	});
1063	<
1064	<	try {
1065	<	t.start();
1066	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	t.interrupt();
1068	<	t.join(SHORT_DELAY_MS);
1069	<	assertFalse(t.isAlive());
1070	<	}
1071	<	catch (Exception ex) {
1072	<	unexpectedException();
1015	<	}
1051	>	final CountDownLatch locked = new CountDownLatch(1);
1052	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1053	>	public void realRun() throws InterruptedException {
1054	>	lock.writeLock().lock();
1055	>	assertWriteLockedByMoi(lock);
1056	>	assertHasNoWaiters(lock, c);
1057	>	locked.countDown();
1058	>	try {
1059	>	await(c, awaitMethod);
1060	>	} finally {
1061	>	assertWriteLockedByMoi(lock);
1062	>	assertHasNoWaiters(lock, c);
1063	>	lock.writeLock().unlock();
1064	>	assertFalse(Thread.interrupted());
1065	>	}
1066	>	}});
1067	>
1068	>	await(locked);
1069	>	assertHasWaiters(lock, c, t);
1070	>	t.interrupt();
1071	>	awaitTermination(t);
1072	>	assertNotWriteLocked(lock);
1073		}
1074
1075		/**
1076	<	* awaitNanos is interruptible
1076	>	* signalAll wakes up all threads
1077		*/
1078	<	public void testAwaitNanos_Interrupt() {
1079	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1078	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1079	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1080	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1081	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1082	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1083	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1084	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1085	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1086	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1087	>	final PublicReentrantReadWriteLock lock =
1088	>	new PublicReentrantReadWriteLock(fair);
1089		final Condition c = lock.writeLock().newCondition();
1090	<	Thread t = new Thread(new Runnable() {
1091	<	public void run() {
1092	<	try {
1093	<	lock.writeLock().lock();
1094	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1095	<	lock.writeLock().unlock();
1096	<	threadShouldThrow();
1097	<	}
1098	<	catch(InterruptedException success) {
1033	<	}
1034	<	}
1035	<	});
1036	<
1037	<	try {
1038	<	t.start();
1039	<	Thread.sleep(SHORT_DELAY_MS);
1040	<	t.interrupt();
1041	<	t.join(SHORT_DELAY_MS);
1042	<	assertFalse(t.isAlive());
1043	<	}
1044	<	catch (Exception ex) {
1045	<	unexpectedException();
1090	>	final CountDownLatch locked = new CountDownLatch(2);
1091	>	final Lock writeLock = lock.writeLock();
1092	>	class Awaiter extends CheckedRunnable {
1093	>	public void realRun() throws InterruptedException {
1094	>	writeLock.lock();
1095	>	locked.countDown();
1096	>	await(c, awaitMethod);
1097	>	writeLock.unlock();
1098	>	}
1099		}
1100	+
1101	+	Thread t1 = newStartedThread(new Awaiter());
1102	+	Thread t2 = newStartedThread(new Awaiter());
1103	+
1104	+	await(locked);
1105	+	writeLock.lock();
1106	+	assertHasWaiters(lock, c, t1, t2);
1107	+	c.signalAll();
1108	+	assertHasNoWaiters(lock, c);
1109	+	writeLock.unlock();
1110	+	awaitTermination(t1);
1111	+	awaitTermination(t2);
1112		}
1113
1114		/**
1115	<	* awaitUntil is interruptible
1116	<	*/
1117	<	public void testAwaitUntil_Interrupt() {
1118	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1115	>	* signal wakes up waiting threads in FIFO order
1116	>	*/
1117	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1118	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1119	>	public void testSignalWakesFifo(boolean fair) {
1120	>	final PublicReentrantReadWriteLock lock =
1121	>	new PublicReentrantReadWriteLock(fair);
1122		final Condition c = lock.writeLock().newCondition();
1123	<	Thread t = new Thread(new Runnable() {
1124	<	public void run() {
1125	<	try {
1126	<	lock.writeLock().lock();
1127	<	java.util.Date d = new java.util.Date();
1128	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1129	<	lock.writeLock().unlock();
1130	<	threadShouldThrow();
1131	<	}
1132	<	catch(InterruptedException success) {
1133	<	}
1134	<	}
1135	<	});
1136	<
1137	<	try {
1138	<	t.start();
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	t.interrupt();
1141	<	t.join(SHORT_DELAY_MS);
1142	<	assertFalse(t.isAlive());
1143	<	}
1144	<	catch (Exception ex) {
1145	<	unexpectedException();
1146	<	}
1123	>	final CountDownLatch locked1 = new CountDownLatch(1);
1124	>	final CountDownLatch locked2 = new CountDownLatch(1);
1125	>	final Lock writeLock = lock.writeLock();
1126	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1127	>	public void realRun() throws InterruptedException {
1128	>	writeLock.lock();
1129	>	locked1.countDown();
1130	>	c.await();
1131	>	writeLock.unlock();
1132	>	}});
1133	>
1134	>	await(locked1);
1135	>
1136	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1137	>	public void realRun() throws InterruptedException {
1138	>	writeLock.lock();
1139	>	locked2.countDown();
1140	>	c.await();
1141	>	writeLock.unlock();
1142	>	}});
1143	>
1144	>	await(locked2);
1145	>
1146	>	writeLock.lock();
1147	>	assertHasWaiters(lock, c, t1, t2);
1148	>	assertFalse(lock.hasQueuedThreads());
1149	>	c.signal();
1150	>	assertHasWaiters(lock, c, t2);
1151	>	assertTrue(lock.hasQueuedThread(t1));
1152	>	assertFalse(lock.hasQueuedThread(t2));
1153	>	c.signal();
1154	>	assertHasNoWaiters(lock, c);
1155	>	assertTrue(lock.hasQueuedThread(t1));
1156	>	assertTrue(lock.hasQueuedThread(t2));
1157	>	writeLock.unlock();
1158	>	awaitTermination(t1);
1159	>	awaitTermination(t2);
1160		}
1161
1162		/**
1163	<	* signalAll wakes up all threads
1164	<	*/
1165	<	public void testSignalAll() {
1166	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1163	>	* await after multiple reentrant locking preserves lock count
1164	>	*/
1165	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1166	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1167	>	public void testAwaitLockCount(boolean fair) {
1168	>	final PublicReentrantReadWriteLock lock =
1169	>	new PublicReentrantReadWriteLock(fair);
1170		final Condition c = lock.writeLock().newCondition();
1171	<	Thread t1 = new Thread(new Runnable() {
1172	<	public void run() {
1173	<	try {
1174	<	lock.writeLock().lock();
1175	<	c.await();
1176	<	lock.writeLock().unlock();
1177	<	}
1178	<	catch(InterruptedException e) {
1179	<	threadUnexpectedException();
1180	<	}
1181	<	}
1182	<	});
1099	<
1100	<	Thread t2 = new Thread(new Runnable() {
1101	<	public void run() {
1102	<	try {
1103	<	lock.writeLock().lock();
1104	<	c.await();
1105	<	lock.writeLock().unlock();
1106	<	}
1107	<	catch(InterruptedException e) {
1108	<	threadUnexpectedException();
1109	<	}
1110	<	}
1111	<	});
1171	>	final CountDownLatch locked = new CountDownLatch(2);
1172	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1173	>	public void realRun() throws InterruptedException {
1174	>	lock.writeLock().lock();
1175	>	assertWriteLockedByMoi(lock);
1176	>	assertEquals(1, lock.writeLock().getHoldCount());
1177	>	locked.countDown();
1178	>	c.await();
1179	>	assertWriteLockedByMoi(lock);
1180	>	assertEquals(1, lock.writeLock().getHoldCount());
1181	>	lock.writeLock().unlock();
1182	>	}});
1183
1184	<	try {
1185	<	t1.start();
1186	<	t2.start();
1187	<	Thread.sleep(SHORT_DELAY_MS);
1188	<	lock.writeLock().lock();
1189	<	c.signalAll();
1190	<	lock.writeLock().unlock();
1191	<	t1.join(SHORT_DELAY_MS);
1192	<	t2.join(SHORT_DELAY_MS);
1193	<	assertFalse(t1.isAlive());
1194	<	assertFalse(t2.isAlive());
1195	<	}
1196	<	catch (Exception ex) {
1197	<	unexpectedException();
1198	<	}
1184	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1185	>	public void realRun() throws InterruptedException {
1186	>	lock.writeLock().lock();
1187	>	lock.writeLock().lock();
1188	>	assertWriteLockedByMoi(lock);
1189	>	assertEquals(2, lock.writeLock().getHoldCount());
1190	>	locked.countDown();
1191	>	c.await();
1192	>	assertWriteLockedByMoi(lock);
1193	>	assertEquals(2, lock.writeLock().getHoldCount());
1194	>	lock.writeLock().unlock();
1195	>	lock.writeLock().unlock();
1196	>	}});
1197	>
1198	>	await(locked);
1199	>	lock.writeLock().lock();
1200	>	assertHasWaiters(lock, c, t1, t2);
1201	>	c.signalAll();
1202	>	assertHasNoWaiters(lock, c);
1203	>	lock.writeLock().unlock();
1204	>	awaitTermination(t1);
1205	>	awaitTermination(t2);
1206		}
1207
1208		/**
1209		* A serialized lock deserializes as unlocked
1210		*/
1211	<	public void testSerialization() {
1212	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1213	<	l.readLock().lock();
1214	<	l.readLock().unlock();
1211	>	public void testSerialization()      { testSerialization(false); }
1212	>	public void testSerialization_fair() { testSerialization(true); }
1213	>	public void testSerialization(boolean fair) {
1214	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1215	>	lock.writeLock().lock();
1216	>	lock.readLock().lock();
1217
1218	<	try {
1219	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1220	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1221	<	out.writeObject(l);
1222	<	out.close();
1223	<
1224	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1225	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1226	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1227	<	r.readLock().lock();
1228	<	r.readLock().unlock();
1229	<	} catch(Exception e){
1230	<	e.printStackTrace();
1231	<	unexpectedException();
1232	<	}
1218	>	ReentrantReadWriteLock clone = serialClone(lock);
1219	>	assertEquals(lock.isFair(), clone.isFair());
1220	>	assertTrue(lock.isWriteLocked());
1221	>	assertFalse(clone.isWriteLocked());
1222	>	assertEquals(1, lock.getReadLockCount());
1223	>	assertEquals(0, clone.getReadLockCount());
1224	>	clone.writeLock().lock();
1225	>	clone.readLock().lock();
1226	>	assertTrue(clone.isWriteLocked());
1227	>	assertEquals(1, clone.getReadLockCount());
1228	>	clone.readLock().unlock();
1229	>	clone.writeLock().unlock();
1230	>	assertFalse(clone.isWriteLocked());
1231	>	assertEquals(1, lock.getReadLockCount());
1232	>	assertEquals(0, clone.getReadLockCount());
1233		}
1234
1235		/**
1236		* hasQueuedThreads reports whether there are waiting threads
1237		*/
1238	<	public void testhasQueuedThreads() {
1239	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1238	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1239	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1240	>	public void testHasQueuedThreads(boolean fair) {
1241	>	final PublicReentrantReadWriteLock lock =
1242	>	new PublicReentrantReadWriteLock(fair);
1243		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1244		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1245	<	try {
1246	<	assertFalse(lock.hasQueuedThreads());
1247	<	lock.writeLock().lock();
1248	<	t1.start();
1249	<	Thread.sleep(SHORT_DELAY_MS);
1250	<	assertTrue(lock.hasQueuedThreads());
1251	<	t2.start();
1252	<	Thread.sleep(SHORT_DELAY_MS);
1253	<	assertTrue(lock.hasQueuedThreads());
1254	<	t1.interrupt();
1255	<	Thread.sleep(SHORT_DELAY_MS);
1256	<	assertTrue(lock.hasQueuedThreads());
1257	<	lock.writeLock().unlock();
1258	<	Thread.sleep(SHORT_DELAY_MS);
1259	<	assertFalse(lock.hasQueuedThreads());
1260	<	t1.join();
1178	<	t2.join();
1179	<	} catch(Exception e){
1180	<	unexpectedException();
1181	<	}
1182	<	}
1245	>	assertFalse(lock.hasQueuedThreads());
1246	>	lock.writeLock().lock();
1247	>	assertFalse(lock.hasQueuedThreads());
1248	>	t1.start();
1249	>	waitForQueuedThread(lock, t1);
1250	>	assertTrue(lock.hasQueuedThreads());
1251	>	t2.start();
1252	>	waitForQueuedThread(lock, t2);
1253	>	assertTrue(lock.hasQueuedThreads());
1254	>	t1.interrupt();
1255	>	awaitTermination(t1);
1256	>	assertTrue(lock.hasQueuedThreads());
1257	>	lock.writeLock().unlock();
1258	>	awaitTermination(t2);
1259	>	assertFalse(lock.hasQueuedThreads());
1260	>	}
1261
1262		/**
1263		* hasQueuedThread(null) throws NPE
1264		*/
1265	<	public void testHasQueuedThreadNPE() {
1266	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1265	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1266	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1267	>	public void testHasQueuedThreadNPE(boolean fair) {
1268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1269		try {
1270	<	sync.hasQueuedThread(null);
1270	>	lock.hasQueuedThread(null);
1271		shouldThrow();
1272	<	} catch (NullPointerException success) {
1193	<	}
1272	>	} catch (NullPointerException success) {}
1273		}
1274
1275		/**
1276	<	* hasQueuedThread reports whether a thread is queued.
1276	>	* hasQueuedThread reports whether a thread is queued
1277		*/
1278	<	public void testHasQueuedThread() {
1279	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1280	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1281	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1282	<	try {
1283	<	assertFalse(sync.hasQueuedThread(t1));
1284	<	assertFalse(sync.hasQueuedThread(t2));
1285	<	sync.writeLock().lock();
1286	<	t1.start();
1287	<	Thread.sleep(SHORT_DELAY_MS);
1288	<	assertTrue(sync.hasQueuedThread(t1));
1289	<	t2.start();
1290	<	Thread.sleep(SHORT_DELAY_MS);
1291	<	assertTrue(sync.hasQueuedThread(t1));
1292	<	assertTrue(sync.hasQueuedThread(t2));
1293	<	t1.interrupt();
1294	<	Thread.sleep(SHORT_DELAY_MS);
1295	<	assertFalse(sync.hasQueuedThread(t1));
1296	<	assertTrue(sync.hasQueuedThread(t2));
1297	<	sync.writeLock().unlock();
1298	<	Thread.sleep(SHORT_DELAY_MS);
1299	<	assertFalse(sync.hasQueuedThread(t1));
1300	<	Thread.sleep(SHORT_DELAY_MS);
1301	<	assertFalse(sync.hasQueuedThread(t2));
1302	<	t1.join();
1303	<	t2.join();
1304	<	} catch(Exception e){
1226	<	unexpectedException();
1227	<	}
1228	<	}
1229	<
1278	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1279	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1280	>	public void testHasQueuedThread(boolean fair) {
1281	>	final PublicReentrantReadWriteLock lock =
1282	>	new PublicReentrantReadWriteLock(fair);
1283	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1284	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1285	>	assertFalse(lock.hasQueuedThread(t1));
1286	>	assertFalse(lock.hasQueuedThread(t2));
1287	>	lock.writeLock().lock();
1288	>	t1.start();
1289	>	waitForQueuedThread(lock, t1);
1290	>	assertTrue(lock.hasQueuedThread(t1));
1291	>	assertFalse(lock.hasQueuedThread(t2));
1292	>	t2.start();
1293	>	waitForQueuedThread(lock, t2);
1294	>	assertTrue(lock.hasQueuedThread(t1));
1295	>	assertTrue(lock.hasQueuedThread(t2));
1296	>	t1.interrupt();
1297	>	awaitTermination(t1);
1298	>	assertFalse(lock.hasQueuedThread(t1));
1299	>	assertTrue(lock.hasQueuedThread(t2));
1300	>	lock.writeLock().unlock();
1301	>	awaitTermination(t2);
1302	>	assertFalse(lock.hasQueuedThread(t1));
1303	>	assertFalse(lock.hasQueuedThread(t2));
1304	>	}
1305
1306		/**
1307		* getQueueLength reports number of waiting threads
1308		*/
1309	<	public void testGetQueueLength() {
1310	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1309	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1310	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1311	>	public void testGetQueueLength(boolean fair) {
1312	>	final PublicReentrantReadWriteLock lock =
1313	>	new PublicReentrantReadWriteLock(fair);
1314		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1315		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1316	<	try {
1317	<	assertEquals(0, lock.getQueueLength());
1318	<	lock.writeLock().lock();
1319	<	t1.start();
1320	<	Thread.sleep(SHORT_DELAY_MS);
1321	<	assertEquals(1, lock.getQueueLength());
1322	<	t2.start();
1323	<	Thread.sleep(SHORT_DELAY_MS);
1324	<	assertEquals(2, lock.getQueueLength());
1325	<	t1.interrupt();
1326	<	Thread.sleep(SHORT_DELAY_MS);
1327	<	assertEquals(1, lock.getQueueLength());
1328	<	lock.writeLock().unlock();
1329	<	Thread.sleep(SHORT_DELAY_MS);
1330	<	assertEquals(0, lock.getQueueLength());
1253	<	t1.join();
1254	<	t2.join();
1255	<	} catch(Exception e){
1256	<	unexpectedException();
1257	<	}
1258	<	}
1316	>	assertEquals(0, lock.getQueueLength());
1317	>	lock.writeLock().lock();
1318	>	t1.start();
1319	>	waitForQueuedThread(lock, t1);
1320	>	assertEquals(1, lock.getQueueLength());
1321	>	t2.start();
1322	>	waitForQueuedThread(lock, t2);
1323	>	assertEquals(2, lock.getQueueLength());
1324	>	t1.interrupt();
1325	>	awaitTermination(t1);
1326	>	assertEquals(1, lock.getQueueLength());
1327	>	lock.writeLock().unlock();
1328	>	awaitTermination(t2);
1329	>	assertEquals(0, lock.getQueueLength());
1330	>	}
1331
1332		/**
1333		* getQueuedThreads includes waiting threads
1334		*/
1335	<	public void testGetQueuedThreads() {
1336	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1335	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1336	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1337	>	public void testGetQueuedThreads(boolean fair) {
1338	>	final PublicReentrantReadWriteLock lock =
1339	>	new PublicReentrantReadWriteLock(fair);
1340		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1341		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1342	<	try {
1343	<	assertTrue(lock.getQueuedThreads().isEmpty());
1344	<	lock.writeLock().lock();
1345	<	assertTrue(lock.getQueuedThreads().isEmpty());
1346	<	t1.start();
1347	<	Thread.sleep(SHORT_DELAY_MS);
1348	<	assertTrue(lock.getQueuedThreads().contains(t1));
1349	<	t2.start();
1350	<	Thread.sleep(SHORT_DELAY_MS);
1351	<	assertTrue(lock.getQueuedThreads().contains(t1));
1352	<	assertTrue(lock.getQueuedThreads().contains(t2));
1353	<	t1.interrupt();
1354	<	Thread.sleep(SHORT_DELAY_MS);
1355	<	assertFalse(lock.getQueuedThreads().contains(t1));
1356	<	assertTrue(lock.getQueuedThreads().contains(t2));
1357	<	lock.writeLock().unlock();
1358	<	Thread.sleep(SHORT_DELAY_MS);
1359	<	assertTrue(lock.getQueuedThreads().isEmpty());
1360	<	t1.join();
1361	<	t2.join();
1362	<	} catch(Exception e){
1288	<	unexpectedException();
1289	<	}
1290	<	}
1342	>	assertTrue(lock.getQueuedThreads().isEmpty());
1343	>	lock.writeLock().lock();
1344	>	assertTrue(lock.getQueuedThreads().isEmpty());
1345	>	t1.start();
1346	>	waitForQueuedThread(lock, t1);
1347	>	assertEquals(1, lock.getQueuedThreads().size());
1348	>	assertTrue(lock.getQueuedThreads().contains(t1));
1349	>	t2.start();
1350	>	waitForQueuedThread(lock, t2);
1351	>	assertEquals(2, lock.getQueuedThreads().size());
1352	>	assertTrue(lock.getQueuedThreads().contains(t1));
1353	>	assertTrue(lock.getQueuedThreads().contains(t2));
1354	>	t1.interrupt();
1355	>	awaitTermination(t1);
1356	>	assertFalse(lock.getQueuedThreads().contains(t1));
1357	>	assertTrue(lock.getQueuedThreads().contains(t2));
1358	>	assertEquals(1, lock.getQueuedThreads().size());
1359	>	lock.writeLock().unlock();
1360	>	awaitTermination(t2);
1361	>	assertTrue(lock.getQueuedThreads().isEmpty());
1362	>	}
1363
1364		/**
1365		* hasWaiters throws NPE if null
1366		*/
1367	<	public void testHasWaitersNPE() {
1368	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1367	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1368	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1369	>	public void testHasWaitersNPE(boolean fair) {
1370	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1371		try {
1372		lock.hasWaiters(null);
1373		shouldThrow();
1374	<	} catch (NullPointerException success) {
1301	<	} catch (Exception ex) {
1302	<	unexpectedException();
1303	<	}
1374	>	} catch (NullPointerException success) {}
1375		}
1376
1377		/**
1378		* getWaitQueueLength throws NPE if null
1379		*/
1380	<	public void testGetWaitQueueLengthNPE() {
1381	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1380	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1381	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1382	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1383	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1384		try {
1385		lock.getWaitQueueLength(null);
1386		shouldThrow();
1387	<	} catch (NullPointerException success) {
1315	<	} catch (Exception ex) {
1316	<	unexpectedException();
1317	<	}
1387	>	} catch (NullPointerException success) {}
1388		}
1389
1320	–
1390		/**
1391		* getWaitingThreads throws NPE if null
1392		*/
1393	<	public void testGetWaitingThreadsNPE() {
1394	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1393	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1394	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1395	>	public void testGetWaitingThreadsNPE(boolean fair) {
1396	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1397		try {
1398		lock.getWaitingThreads(null);
1399		shouldThrow();
1400	<	} catch (NullPointerException success) {
1330	<	} catch (Exception ex) {
1331	<	unexpectedException();
1332	<	}
1400	>	} catch (NullPointerException success) {}
1401		}
1402
1403		/**
1404	<	* hasWaiters throws IAE if not owned
1404	>	* hasWaiters throws IllegalArgumentException if not owned
1405		*/
1406	<	public void testHasWaitersIAE() {
1407	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1408	<	final Condition c = (lock.writeLock().newCondition());
1409	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1406	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1407	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1408	>	public void testHasWaitersIAE(boolean fair) {
1409	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1410	>	final Condition c = lock.writeLock().newCondition();
1411	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1412		try {
1413		lock2.hasWaiters(c);
1414		shouldThrow();
1415	<	} catch (IllegalArgumentException success) {
1346	<	} catch (Exception ex) {
1347	<	unexpectedException();
1348	<	}
1415	>	} catch (IllegalArgumentException success) {}
1416		}
1417
1418		/**
1419	<	* hasWaiters throws IMSE if not locked
1419	>	* hasWaiters throws IllegalMonitorStateException if not locked
1420		*/
1421	<	public void testHasWaitersIMSE() {
1422	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1423	<	final Condition c = (lock.writeLock().newCondition());
1421	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1422	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1423	>	public void testHasWaitersIMSE(boolean fair) {
1424	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1425	>	final Condition c = lock.writeLock().newCondition();
1426		try {
1427		lock.hasWaiters(c);
1428		shouldThrow();
1429	<	} catch (IllegalMonitorStateException success) {
1361	<	} catch (Exception ex) {
1362	<	unexpectedException();
1363	<	}
1429	>	} catch (IllegalMonitorStateException success) {}
1430		}
1431
1366	–
1432		/**
1433	<	* getWaitQueueLength throws IAE if not owned
1433	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1434		*/
1435	<	public void testGetWaitQueueLengthIAE() {
1436	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1437	<	final Condition c = (lock.writeLock().newCondition());
1438	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1435	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1436	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1437	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1438	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1439	>	final Condition c = lock.writeLock().newCondition();
1440	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1441		try {
1442		lock2.getWaitQueueLength(c);
1443		shouldThrow();
1444	<	} catch (IllegalArgumentException success) {
1378	<	} catch (Exception ex) {
1379	<	unexpectedException();
1380	<	}
1444	>	} catch (IllegalArgumentException success) {}
1445		}
1446
1447		/**
1448	<	* getWaitQueueLength throws IMSE if not locked
1448	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1449		*/
1450	<	public void testGetWaitQueueLengthIMSE() {
1451	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1452	<	final Condition c = (lock.writeLock().newCondition());
1450	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1451	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1452	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1453	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1454	>	final Condition c = lock.writeLock().newCondition();
1455		try {
1456		lock.getWaitQueueLength(c);
1457		shouldThrow();
1458	<	} catch (IllegalMonitorStateException success) {
1393	<	} catch (Exception ex) {
1394	<	unexpectedException();
1395	<	}
1458	>	} catch (IllegalMonitorStateException success) {}
1459		}
1460
1398	–
1461		/**
1462	<	* getWaitingThreads throws IAE if not owned
1462	>	* getWaitingThreads throws IllegalArgumentException if not owned
1463		*/
1464	<	public void testGetWaitingThreadsIAE() {
1465	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1466	<	final Condition c = (lock.writeLock().newCondition());
1467	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1464	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1465	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1466	>	public void testGetWaitingThreadsIAE(boolean fair) {
1467	>	final PublicReentrantReadWriteLock lock =
1468	>	new PublicReentrantReadWriteLock(fair);
1469	>	final Condition c = lock.writeLock().newCondition();
1470	>	final PublicReentrantReadWriteLock lock2 =
1471	>	new PublicReentrantReadWriteLock(fair);
1472		try {
1473		lock2.getWaitingThreads(c);
1474		shouldThrow();
1475	<	} catch (IllegalArgumentException success) {
1410	<	} catch (Exception ex) {
1411	<	unexpectedException();
1412	<	}
1475	>	} catch (IllegalArgumentException success) {}
1476		}
1477
1478		/**
1479	<	* getWaitingThreads throws IMSE if not locked
1479	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1480		*/
1481	<	public void testGetWaitingThreadsIMSE() {
1482	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1483	<	final Condition c = (lock.writeLock().newCondition());
1481	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1482	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1483	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1484	>	final PublicReentrantReadWriteLock lock =
1485	>	new PublicReentrantReadWriteLock(fair);
1486	>	final Condition c = lock.writeLock().newCondition();
1487		try {
1488		lock.getWaitingThreads(c);
1489		shouldThrow();
1490	<	} catch (IllegalMonitorStateException success) {
1425	<	} catch (Exception ex) {
1426	<	unexpectedException();
1427	<	}
1490	>	} catch (IllegalMonitorStateException success) {}
1491		}
1492
1430	–
1493		/**
1494		* hasWaiters returns true when a thread is waiting, else false
1495		*/
1496	<	public void testHasWaiters() {
1497	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1498	<	final Condition c = (lock.writeLock().newCondition());
1499	<	Thread t = new Thread(new Runnable() {
1500	<	public void run() {
1501	<	try {
1502	<	lock.writeLock().lock();
1503	<	threadAssertFalse(lock.hasWaiters(c));
1504	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1505	<	c.await();
1506	<	lock.writeLock().unlock();
1507	<	}
1508	<	catch(InterruptedException e) {
1509	<	threadUnexpectedException();
1510	<	}
1511	<	}
1512	<	});
1496	>	public void testHasWaiters()      { testHasWaiters(false); }
1497	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1498	>	public void testHasWaiters(boolean fair) {
1499	>	final PublicReentrantReadWriteLock lock =
1500	>	new PublicReentrantReadWriteLock(fair);
1501	>	final Condition c = lock.writeLock().newCondition();
1502	>	final CountDownLatch locked = new CountDownLatch(1);
1503	>	Thread t = newStartedThread(new CheckedRunnable() {
1504	>	public void realRun() throws InterruptedException {
1505	>	lock.writeLock().lock();
1506	>	assertHasNoWaiters(lock, c);
1507	>	assertFalse(lock.hasWaiters(c));
1508	>	locked.countDown();
1509	>	c.await();
1510	>	assertHasNoWaiters(lock, c);
1511	>	assertFalse(lock.hasWaiters(c));
1512	>	lock.writeLock().unlock();
1513	>	}});
1514
1515	<	try {
1516	<	t.start();
1517	<	Thread.sleep(SHORT_DELAY_MS);
1518	<	lock.writeLock().lock();
1519	<	assertTrue(lock.hasWaiters(c));
1520	<	assertEquals(1, lock.getWaitQueueLength(c));
1521	<	c.signal();
1522	<	lock.writeLock().unlock();
1523	<	Thread.sleep(SHORT_DELAY_MS);
1524	<	lock.writeLock().lock();
1462	<	assertFalse(lock.hasWaiters(c));
1463	<	assertEquals(0, lock.getWaitQueueLength(c));
1464	<	lock.writeLock().unlock();
1465	<	t.join(SHORT_DELAY_MS);
1466	<	assertFalse(t.isAlive());
1467	<	}
1468	<	catch (Exception ex) {
1469	<	unexpectedException();
1470	<	}
1515	>	await(locked);
1516	>	lock.writeLock().lock();
1517	>	assertHasWaiters(lock, c, t);
1518	>	assertTrue(lock.hasWaiters(c));
1519	>	c.signal();
1520	>	assertHasNoWaiters(lock, c);
1521	>	assertFalse(lock.hasWaiters(c));
1522	>	lock.writeLock().unlock();
1523	>	awaitTermination(t);
1524	>	assertHasNoWaiters(lock, c);
1525		}
1526
1527		/**
1528		* getWaitQueueLength returns number of waiting threads
1529		*/
1530	<	public void testGetWaitQueueLength() {
1531	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1532	<	final Condition c = (lock.writeLock().newCondition());
1533	<	Thread t = new Thread(new Runnable() {
1534	<	public void run() {
1535	<	try {
1536	<	lock.writeLock().lock();
1537	<	threadAssertFalse(lock.hasWaiters(c));
1538	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1539	<	c.await();
1540	<	lock.writeLock().unlock();
1541	<	}
1542	<	catch(InterruptedException e) {
1543	<	threadUnexpectedException();
1544	<	}
1491	<	}
1492	<	});
1530	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1531	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1532	>	public void testGetWaitQueueLength(boolean fair) {
1533	>	final PublicReentrantReadWriteLock lock =
1534	>	new PublicReentrantReadWriteLock(fair);
1535	>	final Condition c = lock.writeLock().newCondition();
1536	>	final CountDownLatch locked = new CountDownLatch(1);
1537	>	Thread t = newStartedThread(new CheckedRunnable() {
1538	>	public void realRun() throws InterruptedException {
1539	>	lock.writeLock().lock();
1540	>	assertEquals(0, lock.getWaitQueueLength(c));
1541	>	locked.countDown();
1542	>	c.await();
1543	>	lock.writeLock().unlock();
1544	>	}});
1545
1546	<	try {
1547	<	t.start();
1548	<	Thread.sleep(SHORT_DELAY_MS);
1549	<	lock.writeLock().lock();
1550	<	assertTrue(lock.hasWaiters(c));
1551	<	assertEquals(1, lock.getWaitQueueLength(c));
1552	<	c.signal();
1553	<	lock.writeLock().unlock();
1554	<	Thread.sleep(SHORT_DELAY_MS);
1503	<	lock.writeLock().lock();
1504	<	assertFalse(lock.hasWaiters(c));
1505	<	assertEquals(0, lock.getWaitQueueLength(c));
1506	<	lock.writeLock().unlock();
1507	<	t.join(SHORT_DELAY_MS);
1508	<	assertFalse(t.isAlive());
1509	<	}
1510	<	catch (Exception ex) {
1511	<	unexpectedException();
1512	<	}
1546	>	await(locked);
1547	>	lock.writeLock().lock();
1548	>	assertHasWaiters(lock, c, t);
1549	>	assertEquals(1, lock.getWaitQueueLength(c));
1550	>	c.signal();
1551	>	assertHasNoWaiters(lock, c);
1552	>	assertEquals(0, lock.getWaitQueueLength(c));
1553	>	lock.writeLock().unlock();
1554	>	awaitTermination(t);
1555		}
1556
1515	–
1557		/**
1558		* getWaitingThreads returns only and all waiting threads
1559		*/
1560	<	public void testGetWaitingThreads() {
1561	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1560	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1561	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1562	>	public void testGetWaitingThreads(boolean fair) {
1563	>	final PublicReentrantReadWriteLock lock =
1564	>	new PublicReentrantReadWriteLock(fair);
1565		final Condition c = lock.writeLock().newCondition();
1566	<	Thread t1 = new Thread(new Runnable() {
1567	<	public void run() {
1568	<	try {
1569	<	lock.writeLock().lock();
1570	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1571	<	c.await();
1572	<	lock.writeLock().unlock();
1573	<	}
1574	<	catch(InterruptedException e) {
1575	<	threadUnexpectedException();
1532	<	}
1533	<	}
1534	<	});
1535	<
1536	<	Thread t2 = new Thread(new Runnable() {
1537	<	public void run() {
1538	<	try {
1539	<	lock.writeLock().lock();
1540	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1541	<	c.await();
1542	<	lock.writeLock().unlock();
1543	<	}
1544	<	catch(InterruptedException e) {
1545	<	threadUnexpectedException();
1546	<	}
1547	<	}
1548	<	});
1566	>	final CountDownLatch locked1 = new CountDownLatch(1);
1567	>	final CountDownLatch locked2 = new CountDownLatch(1);
1568	>	Thread t1 = new Thread(new CheckedRunnable() {
1569	>	public void realRun() throws InterruptedException {
1570	>	lock.writeLock().lock();
1571	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1572	>	locked1.countDown();
1573	>	c.await();
1574	>	lock.writeLock().unlock();
1575	>	}});
1576
1577	<	try {
1578	<	lock.writeLock().lock();
1579	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1580	<	lock.writeLock().unlock();
1581	<	t1.start();
1582	<	Thread.sleep(SHORT_DELAY_MS);
1583	<	t2.start();
1584	<	Thread.sleep(SHORT_DELAY_MS);
1585	<	lock.writeLock().lock();
1586	<	assertTrue(lock.hasWaiters(c));
1587	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1588	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1589	<	c.signalAll();
1590	<	lock.writeLock().unlock();
1591	<	Thread.sleep(SHORT_DELAY_MS);
1592	<	lock.writeLock().lock();
1593	<	assertFalse(lock.hasWaiters(c));
1594	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1595	<	lock.writeLock().unlock();
1596	<	t1.join(SHORT_DELAY_MS);
1597	<	t2.join(SHORT_DELAY_MS);
1598	<	assertFalse(t1.isAlive());
1599	<	assertFalse(t2.isAlive());
1600	<	}
1601	<	catch (Exception ex) {
1602	<	unexpectedException();
1603	<	}
1577	>	Thread t2 = new Thread(new CheckedRunnable() {
1578	>	public void realRun() throws InterruptedException {
1579	>	lock.writeLock().lock();
1580	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1581	>	locked2.countDown();
1582	>	c.await();
1583	>	lock.writeLock().unlock();
1584	>	}});
1585	>
1586	>	lock.writeLock().lock();
1587	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1588	>	lock.writeLock().unlock();
1589	>
1590	>	t1.start();
1591	>	await(locked1);
1592	>	t2.start();
1593	>	await(locked2);
1594	>
1595	>	lock.writeLock().lock();
1596	>	assertTrue(lock.hasWaiters(c));
1597	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1598	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1599	>	assertEquals(2, lock.getWaitingThreads(c).size());
1600	>	c.signalAll();
1601	>	assertHasNoWaiters(lock, c);
1602	>	lock.writeLock().unlock();
1603	>
1604	>	awaitTermination(t1);
1605	>	awaitTermination(t2);
1606	>
1607	>	assertHasNoWaiters(lock, c);
1608		}
1609
1610		/**
1611		* toString indicates current lock state
1612		*/
1613	<	public void testToString() {
1614	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1615	<	String us = lock.toString();
1616	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1617	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1618	<	lock.writeLock().lock();
1619	<	String ws = lock.toString();
1620	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1621	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1613	>	public void testToString()      { testToString(false); }
1614	>	public void testToString_fair() { testToString(true); }
1615	>	public void testToString(boolean fair) {
1616	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1617	>	assertTrue(lock.toString().contains("Write locks = 0"));
1618	>	assertTrue(lock.toString().contains("Read locks = 0"));
1619	>	lock.writeLock().lock();
1620	>	assertTrue(lock.toString().contains("Write locks = 1"));
1621	>	assertTrue(lock.toString().contains("Read locks = 0"));
1622		lock.writeLock().unlock();
1623		lock.readLock().lock();
1624		lock.readLock().lock();
1625	<	String rs = lock.toString();
1626	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1596	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1625	>	assertTrue(lock.toString().contains("Write locks = 0"));
1626	>	assertTrue(lock.toString().contains("Read locks = 2"));
1627		}
1628
1629		/**
1630		* readLock.toString indicates current lock state
1631		*/
1632	<	public void testReadLockToString() {
1633	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1634	<	String us = lock.readLock().toString();
1635	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1632	>	public void testReadLockToString()      { testReadLockToString(false); }
1633	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1634	>	public void testReadLockToString(boolean fair) {
1635	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1636	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1637		lock.readLock().lock();
1638		lock.readLock().lock();
1639	<	String rs = lock.readLock().toString();
1609	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1639	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1640		}
1641
1642		/**
1643		* writeLock.toString indicates current lock state
1644		*/
1645	<	public void testWriteLockToString() {
1646	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1647	<	String us = lock.writeLock().toString();
1648	<	assertTrue(us.indexOf("Unlocked") >= 0);
1645	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1646	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1647	>	public void testWriteLockToString(boolean fair) {
1648	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1649	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1650		lock.writeLock().lock();
1651	<	String ls = lock.writeLock().toString();
1652	<	assertTrue(ls.indexOf("Locked") >= 0);
1651	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1652	>	lock.writeLock().unlock();
1653	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1654		}
1655
1656		}

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