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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.12 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.61 by jsr166, Fri May 13 21:48:59 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);
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);
71	<	assertTrue(r2.isFair());
72	<	assertFalse(r2.isWriteLocked());
73	<	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	>	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 AssertionError("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	<	public void testLock() {
94	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
95	<	rl.writeLock().lock();
96	<	assertTrue(rl.isWriteLocked());
97	<	assertTrue(rl.isWriteLockedByCurrentThread());
98	<	assertEquals(0, rl.getReadLockCount());
99	<	rl.writeLock().unlock();
86	<	assertFalse(rl.isWriteLocked());
87	<	assertFalse(rl.isWriteLockedByCurrentThread());
88	<	assertEquals(0, rl.getReadLockCount());
89	<	rl.readLock().lock();
90	<	assertFalse(rl.isWriteLocked());
91	<	assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertEquals(1, rl.getReadLockCount());
93	<	rl.readLock().unlock();
94	<	assertFalse(rl.isWriteLocked());
95	<	assertFalse(rl.isWriteLockedByCurrentThread());
96	<	assertEquals(0, rl.getReadLockCount());
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	+	* 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	<	* locking an unlocked fair lock succeeds
121	<	*/
122	<	public void testFairLock() {
123	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
105	<	rl.writeLock().lock();
106	<	assertTrue(rl.isWriteLocked());
107	<	assertTrue(rl.isWriteLockedByCurrentThread());
108	<	assertEquals(0, rl.getReadLockCount());
109	<	rl.writeLock().unlock();
110	<	assertFalse(rl.isWriteLocked());
111	<	assertFalse(rl.isWriteLockedByCurrentThread());
112	<	assertEquals(0, rl.getReadLockCount());
113	<	rl.readLock().lock();
114	<	assertFalse(rl.isWriteLocked());
115	<	assertFalse(rl.isWriteLockedByCurrentThread());
116	<	assertEquals(1, rl.getReadLockCount());
117	<	rl.readLock().unlock();
118	<	assertFalse(rl.isWriteLocked());
119	<	assertFalse(rl.isWriteLockedByCurrentThread());
120	<	assertEquals(0, rl.getReadLockCount());
120	>	* Checks that lock is write-locked by the current thread.
121	>	*/
122	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
123	>	assertWriteLockedBy(lock, Thread.currentThread());
124		}
125
126		/**
127	<	* getWriteHoldCount returns number of recursive holds
127	>	* Checks that condition c has no waiters.
128		*/
129	<	public void testGetHoldCount() {
130	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
128	<	for(int i = 1; i <= SIZE; i++) {
129	<	lock.writeLock().lock();
130	<	assertEquals(i,lock.getWriteHoldCount());
131	<	}
132	<	for(int i = SIZE; i > 0; i--) {
133	<	lock.writeLock().unlock();
134	<	assertEquals(i-1,lock.getWriteHoldCount());
135	<	}
129	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131		}
137	–
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, 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	<	lock.writeLock().lock();
156	<	Thread t = new Thread(new Runnable() {
157	<	public void run() {
158	<	try {
159	<	lock.writeLock().lockInterruptibly();
160	<	threadShouldThrow();
161	<	} catch(InterruptedException success){}
162	<	}
163	<	});
164	<	try {
165	<	t.start();
166	<	t.interrupt();
168	<	lock.writeLock().unlock();
169	<	t.join();
170	<	} catch(Exception e){
171	<	unexpectedException();
172	<	}
173	<	}
174	<
175	<	/**
176	<	* timed write-trylock is interruptible
177	<	*/
178	<	public void testWriteTryLock_Interrupted() {
179	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
180	<	lock.writeLock().lock();
181	<	Thread t = new Thread(new Runnable() {
182	<	public void run() {
183	<	try {
184	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
185	<	threadShouldThrow();
186	<	} catch(InterruptedException success){}
187	<	}
188	<	});
189	<	try {
190	<	t.start();
191	<	t.interrupt();
192	<	lock.writeLock().unlock();
193	<	t.join();
194	<	} catch(Exception e){
195	<	unexpectedException();
153	>	void await(Condition c, AwaitMethod awaitMethod)
154	>	throws InterruptedException {
155	>	switch (awaitMethod) {
156	>	case await:
157	>	c.await();
158	>	break;
159	>	case awaitNanos:
160	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
161	>	assertTrue(nanosRemaining > 0);
162	>	break;
163	>	case awaitUntil:
164	>	java.util.Date d = new java.util.Date();
165	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
166	>	break;
167		}
168		}
169
170		/**
171	<	* read-lockInterruptibly is interruptible
171	>	* Constructor sets given fairness, and is in unlocked state
172		*/
173	<	public void testReadLockInterruptibly_Interrupted() {
174	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
175	<	lock.writeLock().lock();
176	<	Thread t = new Thread(new Runnable() {
177	<	public void run() {
178	<	try {
179	<	lock.readLock().lockInterruptibly();
180	<	threadShouldThrow();
181	<	} catch(InterruptedException success){}
182	<	}
183	<	});
184	<	try {
185	<	t.start();
186	<	t.interrupt();
187	<	lock.writeLock().unlock();
188	<	t.join();
189	<	} catch(Exception e){
219	<	unexpectedException();
220	<	}
221	<	}
222	<
223	<	/**
224	<	* timed read-trylock is interruptible
225	<	*/
226	<	public void testReadTryLock_Interrupted() {
227	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
228	<	lock.writeLock().lock();
229	<	Thread t = new Thread(new Runnable() {
230	<	public void run() {
231	<	try {
232	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
233	<	threadShouldThrow();
234	<	} catch(InterruptedException success){}
235	<	}
236	<	});
237	<	try {
238	<	t.start();
239	<	t.interrupt();
240	<	t.join();
241	<	} catch(Exception e){
242	<	unexpectedException();
243	<	}
173	>	public void testConstructor() {
174	>	PublicReentrantReadWriteLock lock;
175	>
176	>	lock = new PublicReentrantReadWriteLock();
177	>	assertFalse(lock.isFair());
178	>	assertNotWriteLocked(lock);
179	>	assertEquals(0, lock.getReadLockCount());
180	>
181	>	lock = new PublicReentrantReadWriteLock(true);
182	>	assertTrue(lock.isFair());
183	>	assertNotWriteLocked(lock);
184	>	assertEquals(0, lock.getReadLockCount());
185	>
186	>	lock = new PublicReentrantReadWriteLock(false);
187	>	assertFalse(lock.isFair());
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190		}
191
192	<
193	<	/**
194	<	* write-trylock fails if locked
195	<	*/
196	<	public void testWriteTryLockWhenLocked() {
197	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
198	<	lock.writeLock().lock();
199	<	Thread t = new Thread(new Runnable() {
200	<	public void run() {
201	<	threadAssertFalse(lock.writeLock().tryLock());
202	<	}
203	<	});
204	<	try {
205	<	t.start();
206	<	t.join();
192	>	/**
193	>	* write-locking and read-locking an unlocked lock succeed
194	>	*/
195	>	public void testLock()      { testLock(false); }
196	>	public void testLock_fair() { testLock(true); }
197	>	public void testLock(boolean fair) {
198	>	PublicReentrantReadWriteLock lock =
199	>	new PublicReentrantReadWriteLock(fair);
200	>	assertNotWriteLocked(lock);
201	>	lock.writeLock().lock();
202	>	assertWriteLockedByMoi(lock);
203	>	lock.writeLock().unlock();
204	>	assertNotWriteLocked(lock);
205	>	assertEquals(0, lock.getReadLockCount());
206	>	lock.readLock().lock();
207	>	assertNotWriteLocked(lock);
208	>	assertEquals(1, lock.getReadLockCount());
209	>	lock.readLock().unlock();
210	>	assertNotWriteLocked(lock);
211	>	assertEquals(0, lock.getReadLockCount());
212	>	}
213	>
214	>	/**
215	>	* getWriteHoldCount returns number of recursive holds
216	>	*/
217	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
218	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
219	>	public void testGetWriteHoldCount(boolean fair) {
220	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
221	>	for (int i = 1; i <= SIZE; i++) {
222	>	lock.writeLock().lock();
223	>	assertEquals(i,lock.getWriteHoldCount());
224	>	}
225	>	for (int i = SIZE; i > 0; i--) {
226		lock.writeLock().unlock();
227	<	} catch(Exception e){
263	<	unexpectedException();
227	>	assertEquals(i-1,lock.getWriteHoldCount());
228		}
229	<	}
229	>	}
230
231		/**
232	<	* read-trylock fails if locked
232	>	* writelock.getHoldCount returns number of recursive holds
233		*/
234	<	public void testReadTryLockWhenLocked() {
235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	<	lock.writeLock().lock();
237	<	Thread t = new Thread(new Runnable() {
238	<	public void run() {
239	<	threadAssertFalse(lock.readLock().tryLock());
240	<	}
241	<	});
242	<	try {
279	<	t.start();
280	<	t.join();
234	>	public void testGetHoldCount()      { testGetHoldCount(false); }
235	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
236	>	public void testGetHoldCount(boolean fair) {
237	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
238	>	for (int i = 1; i <= SIZE; i++) {
239	>	lock.writeLock().lock();
240	>	assertEquals(i,lock.writeLock().getHoldCount());
241	>	}
242	>	for (int i = SIZE; i > 0; i--) {
243		lock.writeLock().unlock();
244	<	} catch(Exception e){
283	<	unexpectedException();
244	>	assertEquals(i-1,lock.writeLock().getHoldCount());
245		}
246	<	}
246	>	}
247
248		/**
249	<	* Multiple threads can hold a read lock when not write-locked
249	>	* getReadHoldCount returns number of recursive holds
250		*/
251	<	public void testMultipleReadLocks() {
252	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	<	lock.readLock().lock();
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run() {
256	<	threadAssertTrue(lock.readLock().tryLock());
257	<	lock.readLock().unlock();
258	<	}
259	<	});
299	<	try {
300	<	t.start();
301	<	t.join();
251	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
252	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
253	>	public void testGetReadHoldCount(boolean fair) {
254	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
255	>	for (int i = 1; i <= SIZE; i++) {
256	>	lock.readLock().lock();
257	>	assertEquals(i,lock.getReadHoldCount());
258	>	}
259	>	for (int i = SIZE; i > 0; i--) {
260		lock.readLock().unlock();
261	<	} catch(Exception e){
304	<	unexpectedException();
261	>	assertEquals(i-1,lock.getReadHoldCount());
262		}
263	<	}
263	>	}
264
265		/**
266	<	* A writelock succeeds after reading threads unlock
266	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
267		*/
268	<	public void testWriteAfterMultipleReadLocks() {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	lock.readLock().lock();
271	<	Thread t1 = new Thread(new Runnable() {
315	<	public void run() {
316	<	lock.readLock().lock();
317	<	lock.readLock().unlock();
318	<	}
319	<	});
320	<	Thread t2 = new Thread(new Runnable() {
321	<	public void run() {
322	<	lock.writeLock().lock();
323	<	lock.writeLock().unlock();
324	<	}
325	<	});
326	<
268	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
269	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
270	>	public void testWriteUnlock_IMSE(boolean fair) {
271	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
272		try {
328	–	t1.start();
329	–	t2.start();
330	–	Thread.sleep(SHORT_DELAY_MS);
331	–	lock.readLock().unlock();
332	–	t1.join(MEDIUM_DELAY_MS);
333	–	t2.join(MEDIUM_DELAY_MS);
334	–	assertTrue(!t1.isAlive());
335	–	assertTrue(!t2.isAlive());
336	–
337	–	} catch(Exception e){
338	–	unexpectedException();
339	–	}
340	–	}
341	–
342	–	/**
343	–	* Readlocks succeed after a writing thread unlocks
344	–	*/
345	–	public void testReadAfterWriteLock() {
346	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
347	–	lock.writeLock().lock();
348	–	Thread t1 = new Thread(new Runnable() {
349	–	public void run() {
350	–	lock.readLock().lock();
351	–	lock.readLock().unlock();
352	–	}
353	–	});
354	–	Thread t2 = new Thread(new Runnable() {
355	–	public void run() {
356	–	lock.readLock().lock();
357	–	lock.readLock().unlock();
358	–	}
359	–	});
360	–
361	–	try {
362	–	t1.start();
363	–	t2.start();
364	–	Thread.sleep(SHORT_DELAY_MS);
273		lock.writeLock().unlock();
274	<	t1.join(MEDIUM_DELAY_MS);
275	<	t2.join(MEDIUM_DELAY_MS);
276	<	assertTrue(!t1.isAlive());
369	<	assertTrue(!t2.isAlive());
370	<
371	<	} catch(Exception e){
372	<	unexpectedException();
373	<	}
374	<	}
375	<
274	>	shouldThrow();
275	>	} catch (IllegalMonitorStateException success) {}
276	>	}
277
278		/**
279	<	* Read trylock succeeds if readlocked but not writelocked
280	<	*/
281	<	public void testTryLockWhenReadLocked() {
282	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
283	<	lock.readLock().lock();
284	<	Thread t = new Thread(new Runnable() {
384	<	public void run() {
385	<	threadAssertTrue(lock.readLock().tryLock());
386	<	lock.readLock().unlock();
387	<	}
388	<	});
279	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
280	>	*/
281	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
282	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
283	>	public void testReadUnlock_IMSE(boolean fair) {
284	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
285		try {
390	–	t.start();
391	–	t.join();
286		lock.readLock().unlock();
287	<	} catch(Exception e){
288	<	unexpectedException();
289	<	}
396	<	}
397	<
398	<
287	>	shouldThrow();
288	>	} catch (IllegalMonitorStateException success) {}
289	>	}
290
291		/**
292	<	* write trylock fails when readlocked
292	>	* write-lockInterruptibly is interruptible
293		*/
294	<	public void testWriteTryLockWhenReadLocked() {
295	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	<	lock.readLock().lock();
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	threadAssertFalse(lock.writeLock().tryLock());
300	<	}
301	<	});
302	<	try {
303	<	t.start();
413	<	t.join();
414	<	lock.readLock().unlock();
415	<	} catch(Exception e){
416	<	unexpectedException();
417	<	}
418	<	}
294	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
295	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
296	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
297	>	final PublicReentrantReadWriteLock lock =
298	>	new PublicReentrantReadWriteLock(fair);
299	>	lock.writeLock().lock();
300	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
301	>	public void realRun() throws InterruptedException {
302	>	lock.writeLock().lockInterruptibly();
303	>	}});
304
305	<
305	>	waitForQueuedThread(lock, t);
306	>	t.interrupt();
307	>	awaitTermination(t);
308	>	releaseWriteLock(lock);
309	>	}
310
311		/**
312	<	* write timed trylock times out if locked
313	<	*/
314	<	public void testWriteTryLock_Timeout() {
315	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
316	<	lock.writeLock().lock();
317	<	Thread t = new Thread(new Runnable() {
318	<	public void run() {
319	<	try {
320	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
321	<	} catch (Exception ex) {
322	<	threadUnexpectedException();
323	<	}
324	<	}
325	<	});
326	<	try {
327	<	t.start();
328	<	t.join();
329	<	lock.writeLock().unlock();
441	<	} catch(Exception e){
442	<	unexpectedException();
443	<	}
444	<	}
312	>	* timed write-tryLock is interruptible
313	>	*/
314	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
315	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
316	>	public void testWriteTryLock_Interruptible(boolean fair) {
317	>	final PublicReentrantReadWriteLock lock =
318	>	new PublicReentrantReadWriteLock(fair);
319	>	lock.writeLock().lock();
320	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
321	>	public void realRun() throws InterruptedException {
322	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
323	>	}});
324	>
325	>	waitForQueuedThread(lock, t);
326	>	t.interrupt();
327	>	awaitTermination(t);
328	>	releaseWriteLock(lock);
329	>	}
330
331		/**
332	<	* read timed trylock times out if write-locked
332	>	* read-lockInterruptibly is interruptible
333		*/
334	<	public void testReadTryLock_Timeout() {
335	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
336	<	lock.writeLock().lock();
337	<	Thread t = new Thread(new Runnable() {
338	<	public void run() {
339	<	try {
340	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
341	<	} catch (Exception ex) {
342	<	threadUnexpectedException();
343	<	}
344	<	}
345	<	});
346	<	try {
347	<	t.start();
348	<	t.join();
349	<	lock.writeLock().unlock();
350	<	} catch(Exception e){
351	<	unexpectedException();
352	<	}
353	<	}
334	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
335	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
336	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
337	>	final PublicReentrantReadWriteLock lock =
338	>	new PublicReentrantReadWriteLock(fair);
339	>	lock.writeLock().lock();
340	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
341	>	public void realRun() throws InterruptedException {
342	>	lock.readLock().lockInterruptibly();
343	>	}});
344	>
345	>	waitForQueuedThread(lock, t);
346	>	t.interrupt();
347	>	awaitTermination(t);
348	>	releaseWriteLock(lock);
349	>	}
350	>
351	>	/**
352	>	* timed read-tryLock is interruptible
353	>	*/
354	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
355	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
356	>	public void testReadTryLock_Interruptible(boolean fair) {
357	>	final PublicReentrantReadWriteLock lock =
358	>	new PublicReentrantReadWriteLock(fair);
359	>	lock.writeLock().lock();
360	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
361	>	public void realRun() throws InterruptedException {
362	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
363	>	}});
364	>
365	>	waitForQueuedThread(lock, t);
366	>	t.interrupt();
367	>	awaitTermination(t);
368	>	releaseWriteLock(lock);
369	>	}
370	>
371	>	/**
372	>	* write-tryLock on an unlocked lock succeeds
373	>	*/
374	>	public void testWriteTryLock()      { testWriteTryLock(false); }
375	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
376	>	public void testWriteTryLock(boolean fair) {
377	>	final PublicReentrantReadWriteLock lock =
378	>	new PublicReentrantReadWriteLock(fair);
379	>	assertTrue(lock.writeLock().tryLock());
380	>	assertWriteLockedByMoi(lock);
381	>	assertTrue(lock.writeLock().tryLock());
382	>	assertWriteLockedByMoi(lock);
383	>	lock.writeLock().unlock();
384	>	releaseWriteLock(lock);
385	>	}
386	>
387	>	/**
388	>	* write-tryLock fails if locked
389	>	*/
390	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
391	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
392	>	public void testWriteTryLockWhenLocked(boolean fair) {
393	>	final PublicReentrantReadWriteLock lock =
394	>	new PublicReentrantReadWriteLock(fair);
395	>	lock.writeLock().lock();
396	>	Thread t = newStartedThread(new CheckedRunnable() {
397	>	public void realRun() {
398	>	assertFalse(lock.writeLock().tryLock());
399	>	}});
400	>
401	>	awaitTermination(t);
402	>	releaseWriteLock(lock);
403	>	}
404	>
405	>	/**
406	>	* read-tryLock fails if locked
407	>	*/
408	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
409	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
410	>	public void testReadTryLockWhenLocked(boolean fair) {
411	>	final PublicReentrantReadWriteLock lock =
412	>	new PublicReentrantReadWriteLock(fair);
413	>	lock.writeLock().lock();
414	>	Thread t = newStartedThread(new CheckedRunnable() {
415	>	public void realRun() {
416	>	assertFalse(lock.readLock().tryLock());
417	>	}});
418
419	+	awaitTermination(t);
420	+	releaseWriteLock(lock);
421	+	}
422
423		/**
424	<	* write lockInterruptibly succeeds if lock free else is interruptible
424	>	* Multiple threads can hold a read lock when not write-locked
425		*/
426	<	public void testWriteLockInterruptibly() {
427	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
428	<	try {
426	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
427	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
428	>	public void testMultipleReadLocks(boolean fair) {
429	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
430	>	lock.readLock().lock();
431	>	Thread t = newStartedThread(new CheckedRunnable() {
432	>	public void realRun() throws InterruptedException {
433	>	assertTrue(lock.readLock().tryLock());
434	>	lock.readLock().unlock();
435	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
436	>	lock.readLock().unlock();
437	>	lock.readLock().lock();
438	>	lock.readLock().unlock();
439	>	}});
440	>
441	>	awaitTermination(t);
442	>	lock.readLock().unlock();
443	>	}
444	>
445	>	/**
446	>	* A writelock succeeds only after a reading thread unlocks
447	>	*/
448	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
449	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
450	>	public void testWriteAfterReadLock(boolean fair) {
451	>	final PublicReentrantReadWriteLock lock =
452	>	new PublicReentrantReadWriteLock(fair);
453	>	lock.readLock().lock();
454	>	Thread t = newStartedThread(new CheckedRunnable() {
455	>	public void realRun() {
456	>	assertEquals(1, lock.getReadLockCount());
457	>	lock.writeLock().lock();
458	>	assertEquals(0, lock.getReadLockCount());
459	>	lock.writeLock().unlock();
460	>	}});
461	>	waitForQueuedThread(lock, t);
462	>	assertNotWriteLocked(lock);
463	>	assertEquals(1, lock.getReadLockCount());
464	>	lock.readLock().unlock();
465	>	assertEquals(0, lock.getReadLockCount());
466	>	awaitTermination(t);
467	>	assertNotWriteLocked(lock);
468	>	}
469	>
470	>	/**
471	>	* A writelock succeeds only after reading threads unlock
472	>	*/
473	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
474	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
475	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
476	>	final PublicReentrantReadWriteLock lock =
477	>	new PublicReentrantReadWriteLock(fair);
478	>	lock.readLock().lock();
479	>	lock.readLock().lock();
480	>	Thread t1 = newStartedThread(new CheckedRunnable() {
481	>	public void realRun() {
482	>	lock.readLock().lock();
483	>	assertEquals(3, lock.getReadLockCount());
484	>	lock.readLock().unlock();
485	>	}});
486	>	awaitTermination(t1);
487	>
488	>	Thread t2 = newStartedThread(new CheckedRunnable() {
489	>	public void realRun() {
490	>	assertEquals(2, lock.getReadLockCount());
491	>	lock.writeLock().lock();
492	>	assertEquals(0, lock.getReadLockCount());
493	>	lock.writeLock().unlock();
494	>	}});
495	>	waitForQueuedThread(lock, t2);
496	>	assertNotWriteLocked(lock);
497	>	assertEquals(2, lock.getReadLockCount());
498	>	lock.readLock().unlock();
499	>	lock.readLock().unlock();
500	>	assertEquals(0, lock.getReadLockCount());
501	>	awaitTermination(t2);
502	>	assertNotWriteLocked(lock);
503	>	}
504	>
505	>	/**
506	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
507	>	* will block if there is a waiting writer thread.
508	>	*/
509	>	public void testReaderWriterReaderFairFifo() {
510	>	final PublicReentrantReadWriteLock lock =
511	>	new PublicReentrantReadWriteLock(true);
512	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
513	>
514	>	lock.readLock().lock();
515	>	Thread t1 = newStartedThread(new CheckedRunnable() {
516	>	public void realRun() {
517	>	assertEquals(1, lock.getReadLockCount());
518	>	lock.writeLock().lock();
519	>	assertEquals(0, lock.getReadLockCount());
520	>	t1GotLock.set(true);
521	>	lock.writeLock().unlock();
522	>	}});
523	>	waitForQueuedThread(lock, t1);
524	>
525	>	Thread t2 = newStartedThread(new CheckedRunnable() {
526	>	public void realRun() {
527	>	assertEquals(1, lock.getReadLockCount());
528	>	lock.readLock().lock();
529	>	assertEquals(1, lock.getReadLockCount());
530	>	assertTrue(t1GotLock.get());
531	>	lock.readLock().unlock();
532	>	}});
533	>	waitForQueuedThread(lock, t2);
534	>	assertTrue(t1.isAlive());
535	>	assertNotWriteLocked(lock);
536	>	assertEquals(1, lock.getReadLockCount());
537	>	lock.readLock().unlock();
538	>	awaitTermination(t1);
539	>	awaitTermination(t2);
540	>	assertNotWriteLocked(lock);
541	>	}
542	>
543	>	/**
544	>	* Readlocks succeed only after a writing thread unlocks
545	>	*/
546	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
547	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
548	>	public void testReadAfterWriteLock(boolean fair) {
549	>	final PublicReentrantReadWriteLock lock =
550	>	new PublicReentrantReadWriteLock(fair);
551	>	lock.writeLock().lock();
552	>	Thread t1 = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() {
554	>	lock.readLock().lock();
555	>	lock.readLock().unlock();
556	>	}});
557	>	Thread t2 = newStartedThread(new CheckedRunnable() {
558	>	public void realRun() {
559	>	lock.readLock().lock();
560	>	lock.readLock().unlock();
561	>	}});
562	>
563	>	waitForQueuedThread(lock, t1);
564	>	waitForQueuedThread(lock, t2);
565	>	releaseWriteLock(lock);
566	>	awaitTermination(t1);
567	>	awaitTermination(t2);
568	>	}
569	>
570	>	/**
571	>	* Read trylock succeeds if write locked by current thread
572	>	*/
573	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
574	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
575	>	public void testReadHoldingWriteLock(boolean fair) {
576	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
577	>	lock.writeLock().lock();
578	>	assertTrue(lock.readLock().tryLock());
579	>	lock.readLock().unlock();
580	>	lock.writeLock().unlock();
581	>	}
582	>
583	>	/**
584	>	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
585	>	*/
586	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
587	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
588	>	public void testReadTryLockBarging(boolean fair) {
589	>	final PublicReentrantReadWriteLock lock =
590	>	new PublicReentrantReadWriteLock(fair);
591	>	lock.readLock().lock();
592	>
593	>	Thread t1 = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() {
595	>	lock.writeLock().lock();
596	>	lock.writeLock().unlock();
597	>	}});
598	>
599	>	waitForQueuedThread(lock, t1);
600	>
601	>	Thread t2 = newStartedThread(new CheckedRunnable() {
602	>	public void realRun() {
603	>	lock.readLock().lock();
604	>	lock.readLock().unlock();
605	>	}});
606	>
607	>	if (fair)
608	>	waitForQueuedThread(lock, t2);
609	>
610	>	Thread t3 = newStartedThread(new CheckedRunnable() {
611	>	public void realRun() {
612	>	lock.readLock().tryLock();
613	>	lock.readLock().unlock();
614	>	}});
615	>
616	>	assertTrue(lock.getReadLockCount() > 0);
617	>	awaitTermination(t3);
618	>	assertTrue(t1.isAlive());
619	>	if (fair) assertTrue(t2.isAlive());
620	>	lock.readLock().unlock();
621	>	awaitTermination(t1);
622	>	awaitTermination(t2);
623	>	}
624	>
625	>	/**
626	>	* Read lock succeeds if write locked by current thread even if
627	>	* other threads are waiting for readlock
628	>	*/
629	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
630	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
631	>	public void testReadHoldingWriteLock2(boolean fair) {
632	>	final PublicReentrantReadWriteLock lock =
633	>	new PublicReentrantReadWriteLock(fair);
634	>	lock.writeLock().lock();
635	>	lock.readLock().lock();
636	>	lock.readLock().unlock();
637	>
638	>	Thread t1 = newStartedThread(new CheckedRunnable() {
639	>	public void realRun() {
640	>	lock.readLock().lock();
641	>	lock.readLock().unlock();
642	>	}});
643	>	Thread t2 = newStartedThread(new CheckedRunnable() {
644	>	public void realRun() {
645	>	lock.readLock().lock();
646	>	lock.readLock().unlock();
647	>	}});
648	>
649	>	waitForQueuedThread(lock, t1);
650	>	waitForQueuedThread(lock, t2);
651	>	assertWriteLockedByMoi(lock);
652	>	lock.readLock().lock();
653	>	lock.readLock().unlock();
654	>	releaseWriteLock(lock);
655	>	awaitTermination(t1);
656	>	awaitTermination(t2);
657	>	}
658	>
659	>	/**
660	>	* Read lock succeeds if write locked by current thread even if
661	>	* other threads are waiting for writelock
662	>	*/
663	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
664	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
665	>	public void testReadHoldingWriteLock3(boolean fair) {
666	>	final PublicReentrantReadWriteLock lock =
667	>	new PublicReentrantReadWriteLock(fair);
668	>	lock.writeLock().lock();
669	>	lock.readLock().lock();
670	>	lock.readLock().unlock();
671	>
672	>	Thread t1 = newStartedThread(new CheckedRunnable() {
673	>	public void realRun() {
674	>	lock.writeLock().lock();
675	>	lock.writeLock().unlock();
676	>	}});
677	>	Thread t2 = newStartedThread(new CheckedRunnable() {
678	>	public void realRun() {
679	>	lock.writeLock().lock();
680	>	lock.writeLock().unlock();
681	>	}});
682	>
683	>	waitForQueuedThread(lock, t1);
684	>	waitForQueuedThread(lock, t2);
685	>	assertWriteLockedByMoi(lock);
686	>	lock.readLock().lock();
687	>	lock.readLock().unlock();
688	>	assertWriteLockedByMoi(lock);
689	>	lock.writeLock().unlock();
690	>	awaitTermination(t1);
691	>	awaitTermination(t2);
692	>	}
693	>
694	>	/**
695	>	* Write lock succeeds if write locked by current thread even if
696	>	* other threads are waiting for writelock
697	>	*/
698	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
699	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
700	>	public void testWriteHoldingWriteLock4(boolean fair) {
701	>	final PublicReentrantReadWriteLock lock =
702	>	new PublicReentrantReadWriteLock(fair);
703	>	lock.writeLock().lock();
704	>	lock.writeLock().lock();
705	>	lock.writeLock().unlock();
706	>
707	>	Thread t1 = newStartedThread(new CheckedRunnable() {
708	>	public void realRun() {
709	>	lock.writeLock().lock();
710	>	lock.writeLock().unlock();
711	>	}});
712	>	Thread t2 = newStartedThread(new CheckedRunnable() {
713	>	public void realRun() {
714	>	lock.writeLock().lock();
715	>	lock.writeLock().unlock();
716	>	}});
717	>
718	>	waitForQueuedThread(lock, t1);
719	>	waitForQueuedThread(lock, t2);
720	>	assertWriteLockedByMoi(lock);
721	>	assertEquals(1, lock.getWriteHoldCount());
722	>	lock.writeLock().lock();
723	>	assertWriteLockedByMoi(lock);
724	>	assertEquals(2, lock.getWriteHoldCount());
725	>	lock.writeLock().unlock();
726	>	assertWriteLockedByMoi(lock);
727	>	assertEquals(1, lock.getWriteHoldCount());
728	>	lock.writeLock().unlock();
729	>	awaitTermination(t1);
730	>	awaitTermination(t2);
731	>	}
732	>
733	>	/**
734	>	* Read tryLock succeeds if readlocked but not writelocked
735	>	*/
736	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
737	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
738	>	public void testTryLockWhenReadLocked(boolean fair) {
739	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
740	>	lock.readLock().lock();
741	>	Thread t = newStartedThread(new CheckedRunnable() {
742	>	public void realRun() {
743	>	assertTrue(lock.readLock().tryLock());
744	>	lock.readLock().unlock();
745	>	}});
746	>
747	>	awaitTermination(t);
748	>	lock.readLock().unlock();
749	>	}
750	>
751	>	/**
752	>	* write tryLock fails when readlocked
753	>	*/
754	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
755	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
756	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
757	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
758	>	lock.readLock().lock();
759	>	Thread t = newStartedThread(new CheckedRunnable() {
760	>	public void realRun() {
761	>	assertFalse(lock.writeLock().tryLock());
762	>	}});
763	>
764	>	awaitTermination(t);
765	>	lock.readLock().unlock();
766	>	}
767	>
768	>	/**
769	>	* write timed tryLock times out if locked
770	>	*/
771	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
772	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
773	>	public void testWriteTryLock_Timeout(boolean fair) {
774	>	final PublicReentrantReadWriteLock lock =
775	>	new PublicReentrantReadWriteLock(fair);
776	>	lock.writeLock().lock();
777	>	Thread t = newStartedThread(new CheckedRunnable() {
778	>	public void realRun() throws InterruptedException {
779	>	long startTime = System.nanoTime();
780	>	long timeoutMillis = 10;
781	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
782	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
783	>	}});
784	>
785	>	awaitTermination(t);
786	>	releaseWriteLock(lock);
787	>	}
788	>
789	>	/**
790	>	* read timed tryLock times out if write-locked
791	>	*/
792	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
793	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
794	>	public void testReadTryLock_Timeout(boolean fair) {
795	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
796	>	lock.writeLock().lock();
797	>	Thread t = newStartedThread(new CheckedRunnable() {
798	>	public void realRun() throws InterruptedException {
799	>	long startTime = System.nanoTime();
800	>	long timeoutMillis = 10;
801	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
802	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
803	>	}});
804	>
805	>	awaitTermination(t);
806	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
807	>	lock.writeLock().unlock();
808	>	}
809	>
810	>	/**
811	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
812	>	*/
813	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
814	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
815	>	public void testWriteLockInterruptibly(boolean fair) {
816	>	final PublicReentrantReadWriteLock lock =
817	>	new PublicReentrantReadWriteLock(fair);
818	>	try {
819		lock.writeLock().lockInterruptibly();
820	<	} catch(Exception e) {
821	<	unexpectedException();
480	<	}
481	<	Thread t = new Thread(new Runnable() {
482	<	public void run() {
483	<	try {
484	<	lock.writeLock().lockInterruptibly();
485	<	threadShouldThrow();
486	<	}
487	<	catch(InterruptedException success) {
488	<	}
489	<	}
490	<	});
491	<	try {
492	<	t.start();
493	<	t.interrupt();
494	<	t.join();
495	<	lock.writeLock().unlock();
496	<	} catch(Exception e){
497	<	unexpectedException();
820	>	} catch (InterruptedException ie) {
821	>	threadUnexpectedException(ie);
822		}
823	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
824	+	public void realRun() throws InterruptedException {
825	+	lock.writeLock().lockInterruptibly();
826	+	}});
827	+
828	+	waitForQueuedThread(lock, t);
829	+	t.interrupt();
830	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
831	+	awaitTermination(t);
832	+	releaseWriteLock(lock);
833		}
834
835		/**
836	<	*  read lockInterruptibly succeeds if lock free else is interruptible
836	>	* read lockInterruptibly succeeds if lock free else is interruptible
837		*/
838	<	public void testReadLockInterruptibly() {
839	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840	<	try {
838	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
839	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
840	>	public void testReadLockInterruptibly(boolean fair) {
841	>	final PublicReentrantReadWriteLock lock =
842	>	new PublicReentrantReadWriteLock(fair);
843	>	try {
844	>	lock.readLock().lockInterruptibly();
845	>	lock.readLock().unlock();
846		lock.writeLock().lockInterruptibly();
847	<	} catch(Exception e) {
848	<	unexpectedException();
510	<	}
511	<	Thread t = new Thread(new Runnable() {
512	<	public void run() {
513	<	try {
514	<	lock.readLock().lockInterruptibly();
515	<	threadShouldThrow();
516	<	}
517	<	catch(InterruptedException success) {
518	<	}
519	<	}
520	<	});
521	<	try {
522	<	t.start();
523	<	t.interrupt();
524	<	t.join();
525	<	lock.writeLock().unlock();
526	<	} catch(Exception e){
527	<	unexpectedException();
847	>	} catch (InterruptedException ie) {
848	>	threadUnexpectedException(ie);
849		}
850	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
851	+	public void realRun() throws InterruptedException {
852	+	lock.readLock().lockInterruptibly();
853	+	}});
854	+
855	+	waitForQueuedThread(lock, t);
856	+	t.interrupt();
857	+	awaitTermination(t);
858	+	releaseWriteLock(lock);
859		}
860
861		/**
862		* Calling await without holding lock throws IllegalMonitorStateException
863		*/
864	<	public void testAwait_IllegalMonitor() {
865	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
864	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
865	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
866	>	public void testAwait_IMSE(boolean fair) {
867	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
868		final Condition c = lock.writeLock().newCondition();
869	+	long startTime = System.nanoTime();
870		try {
871	<	c.await();
872	<	shouldThrow();
873	<	}
874	<	catch (IllegalMonitorStateException success) {
875	<	}
876	<	catch (Exception ex) {
877	<	shouldThrow();
871	>	try {
872	>	c.await();
873	>	shouldThrow();
874	>	} catch (IllegalMonitorStateException success) {}
875	>	try {
876	>	c.await(LONG_DELAY_MS, MILLISECONDS);
877	>	shouldThrow();
878	>	} catch (IllegalMonitorStateException success) {}
879	>	try {
880	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
881	>	shouldThrow();
882	>	} catch (IllegalMonitorStateException success) {}
883	>	try {
884	>	c.awaitUninterruptibly();
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {}
887	>	} catch (InterruptedException ie) {
888	>	threadUnexpectedException(ie);
889		}
890	+	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
891		}
892
893		/**
894		* Calling signal without holding lock throws IllegalMonitorStateException
895		*/
896	<	public void testSignal_IllegalMonitor() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
897	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
898	>	public void testSignal_IMSE(boolean fair) {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
900		final Condition c = lock.writeLock().newCondition();
901		try {
902		c.signal();
903		shouldThrow();
904	<	}
558	<	catch (IllegalMonitorStateException success) {
559	<	}
560	<	catch (Exception ex) {
561	<	unexpectedException();
562	<	}
904	>	} catch (IllegalMonitorStateException success) {}
905		}
906
907		/**
908	<	* awaitNanos without a signal times out
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909		*/
910	<	public void testAwaitNanos_Timeout() {
911	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
910	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
911	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
912	>	public void testSignalAll_IMSE(boolean fair) {
913	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
914		final Condition c = lock.writeLock().newCondition();
915		try {
916	+	c.signalAll();
917	+	shouldThrow();
918	+	} catch (IllegalMonitorStateException success) {}
919	+	}
920	+
921	+	/**
922	+	* awaitNanos without a signal times out
923	+	*/
924	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
925	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
926	+	public void testAwaitNanos_Timeout(boolean fair) {
927	+	try {
928	+	final ReentrantReadWriteLock lock =
929	+	new ReentrantReadWriteLock(fair);
930	+	final Condition c = lock.writeLock().newCondition();
931		lock.writeLock().lock();
932	<	long t = c.awaitNanos(100);
933	<	assertTrue(t <= 0);
932	>	long startTime = System.nanoTime();
933	>	long timeoutMillis = 10;
934	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
935	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	>	assertTrue(nanosRemaining <= 0);
937	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
938		lock.writeLock().unlock();
939	<	}
940	<	catch (Exception ex) {
578	<	unexpectedException();
939	>	} catch (InterruptedException e) {
940	>	threadUnexpectedException(e);
941		}
942		}
943
582	–
944		/**
945	<	*  timed await without a signal times out
945	>	* timed await without a signal times out
946		*/
947	<	public void testAwait_Timeout() {
948	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
949	<	final Condition c = lock.writeLock().newCondition();
947	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
948	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
949	>	public void testAwait_Timeout(boolean fair) {
950		try {
951	+	final ReentrantReadWriteLock lock =
952	+	new ReentrantReadWriteLock(fair);
953	+	final Condition c = lock.writeLock().newCondition();
954		lock.writeLock().lock();
955	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
955	>	long startTime = System.nanoTime();
956	>	long timeoutMillis = 10;
957	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
958	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
959		lock.writeLock().unlock();
960	<	}
961	<	catch (Exception ex) {
595	<	unexpectedException();
960	>	} catch (InterruptedException e) {
961	>	threadUnexpectedException(e);
962		}
963		}
964
965		/**
966		* awaitUntil without a signal times out
967		*/
968	<	public void testAwaitUntil_Timeout() {
969	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
970	<	final Condition c = lock.writeLock().newCondition();
971	<	try {
968	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
969	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
970	>	public void testAwaitUntil_Timeout(boolean fair) {
971	>	try {
972	>	final ReentrantReadWriteLock lock =
973	>	new ReentrantReadWriteLock(fair);
974	>	final Condition c = lock.writeLock().newCondition();
975		lock.writeLock().lock();
976	+	long startTime = System.nanoTime();
977	+	long timeoutMillis = 10;
978		java.util.Date d = new java.util.Date();
979	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
979	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
980	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
981		lock.writeLock().unlock();
982	<	}
983	<	catch (Exception ex) {
612	<	unexpectedException();
982	>	} catch (InterruptedException e) {
983	>	threadUnexpectedException(e);
984		}
985		}
986
987		/**
988		* await returns when signalled
989		*/
990	<	public void testAwait() {
991	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
990	>	public void testAwait()      { testAwait(false); }
991	>	public void testAwait_fair() { testAwait(true); }
992	>	public void testAwait(boolean fair) {
993	>	final PublicReentrantReadWriteLock lock =
994	>	new PublicReentrantReadWriteLock(fair);
995		final Condition c = lock.writeLock().newCondition();
996	<	Thread t = new Thread(new Runnable() {
997	<	public void run() {
998	<	try {
999	<	lock.writeLock().lock();
1000	<	c.await();
1001	<	lock.writeLock().unlock();
1002	<	}
1003	<	catch(InterruptedException e) {
1004	<	threadUnexpectedException();
1005	<	}
1006	<	}
1007	<	});
1008	<
1009	<	try {
1010	<	t.start();
1011	<	Thread.sleep(SHORT_DELAY_MS);
1012	<	lock.writeLock().lock();
639	<	c.signal();
640	<	lock.writeLock().unlock();
641	<	t.join(SHORT_DELAY_MS);
642	<	assertFalse(t.isAlive());
643	<	}
644	<	catch (Exception ex) {
645	<	unexpectedException();
646	<	}
996	>	final CountDownLatch locked = new CountDownLatch(1);
997	>	Thread t = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() throws InterruptedException {
999	>	lock.writeLock().lock();
1000	>	locked.countDown();
1001	>	c.await();
1002	>	lock.writeLock().unlock();
1003	>	}});
1004	>
1005	>	await(locked);
1006	>	lock.writeLock().lock();
1007	>	assertHasWaiters(lock, c, t);
1008	>	c.signal();
1009	>	assertHasNoWaiters(lock, c);
1010	>	assertTrue(t.isAlive());
1011	>	lock.writeLock().unlock();
1012	>	awaitTermination(t);
1013		}
1014
1015		/**
1016		* awaitUninterruptibly doesn't abort on interrupt
1017		*/
1018	<	public void testAwaitUninterruptibly() {
1019	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1018	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1019	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1020	>	public void testAwaitUninterruptibly(boolean fair) {
1021	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1022	>	final Condition c = lock.writeLock().newCondition();
1023	>	final CountDownLatch locked = new CountDownLatch(1);
1024	>	Thread t = newStartedThread(new CheckedRunnable() {
1025	>	public void realRun() {
1026	>	lock.writeLock().lock();
1027	>	locked.countDown();
1028	>	c.awaitUninterruptibly();
1029	>	assertTrue(Thread.interrupted());
1030	>	lock.writeLock().unlock();
1031	>	}});
1032	>
1033	>	await(locked);
1034	>	lock.writeLock().lock();
1035	>	lock.writeLock().unlock();
1036	>	t.interrupt();
1037	>	long timeoutMillis = 10;
1038	>	assertThreadStaysAlive(t, timeoutMillis);
1039	>	lock.writeLock().lock();
1040	>	c.signal();
1041	>	lock.writeLock().unlock();
1042	>	awaitTermination(t);
1043	>	}
1044	>
1045	>	/**
1046	>	* await/awaitNanos/awaitUntil is interruptible
1047	>	*/
1048	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1049	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1050	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1051	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1052	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1053	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1054	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1055	>	final PublicReentrantReadWriteLock lock =
1056	>	new PublicReentrantReadWriteLock(fair);
1057		final Condition c = lock.writeLock().newCondition();
1058	<	Thread t = new Thread(new Runnable() {
1059	<	public void run() {
1060	<	lock.writeLock().lock();
1061	<	c.awaitUninterruptibly();
1058	>	final CountDownLatch locked = new CountDownLatch(1);
1059	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1060	>	public void realRun() throws InterruptedException {
1061	>	lock.writeLock().lock();
1062	>	assertWriteLockedByMoi(lock);
1063	>	assertHasNoWaiters(lock, c);
1064	>	locked.countDown();
1065	>	try {
1066	>	await(c, awaitMethod);
1067	>	} finally {
1068	>	assertWriteLockedByMoi(lock);
1069	>	assertHasNoWaiters(lock, c);
1070		lock.writeLock().unlock();
1071	<	}
1072	<	});
1071	>	assertFalse(Thread.interrupted());
1072	>	}
1073	>	}});
1074	>
1075	>	await(locked);
1076	>	assertHasWaiters(lock, c, t);
1077	>	t.interrupt();
1078	>	awaitTermination(t);
1079	>	assertNotWriteLocked(lock);
1080	>	}
1081	>
1082	>	/**
1083	>	* signalAll wakes up all threads
1084	>	*/
1085	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1086	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1087	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1088	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1089	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1090	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1091	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1092	>	final PublicReentrantReadWriteLock lock =
1093	>	new PublicReentrantReadWriteLock(fair);
1094	>	final Condition c = lock.writeLock().newCondition();
1095	>	final CountDownLatch locked = new CountDownLatch(2);
1096	>	final Lock writeLock = lock.writeLock();
1097	>	class Awaiter extends CheckedRunnable {
1098	>	public void realRun() throws InterruptedException {
1099	>	writeLock.lock();
1100	>	locked.countDown();
1101	>	await(c, awaitMethod);
1102	>	writeLock.unlock();
1103	>	}
1104	>	}
1105	>
1106	>	Thread t1 = newStartedThread(new Awaiter());
1107	>	Thread t2 = newStartedThread(new Awaiter());
1108	>
1109	>	await(locked);
1110	>	writeLock.lock();
1111	>	assertHasWaiters(lock, c, t1, t2);
1112	>	c.signalAll();
1113	>	assertHasNoWaiters(lock, c);
1114	>	writeLock.unlock();
1115	>	awaitTermination(t1);
1116	>	awaitTermination(t2);
1117	>	}
1118	>
1119	>	/**
1120	>	* signal wakes up waiting threads in FIFO order.
1121	>	*/
1122	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1123	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1124	>	public void testSignalWakesFifo(boolean fair) {
1125	>	final PublicReentrantReadWriteLock lock =
1126	>	new PublicReentrantReadWriteLock(fair);
1127	>	final Condition c = lock.writeLock().newCondition();
1128	>	final CountDownLatch locked1 = new CountDownLatch(1);
1129	>	final CountDownLatch locked2 = new CountDownLatch(1);
1130	>	final Lock writeLock = lock.writeLock();
1131	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1132	>	public void realRun() throws InterruptedException {
1133	>	writeLock.lock();
1134	>	locked1.countDown();
1135	>	c.await();
1136	>	writeLock.unlock();
1137	>	}});
1138	>
1139	>	await(locked1);
1140	>
1141	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1142	>	public void realRun() throws InterruptedException {
1143	>	writeLock.lock();
1144	>	locked2.countDown();
1145	>	c.await();
1146	>	writeLock.unlock();
1147	>	}});
1148	>
1149	>	await(locked2);
1150	>
1151	>	writeLock.lock();
1152	>	assertHasWaiters(lock, c, t1, t2);
1153	>	assertFalse(lock.hasQueuedThreads());
1154	>	c.signal();
1155	>	assertHasWaiters(lock, c, t2);
1156	>	assertTrue(lock.hasQueuedThread(t1));
1157	>	assertFalse(lock.hasQueuedThread(t2));
1158	>	c.signal();
1159	>	assertHasNoWaiters(lock, c);
1160	>	assertTrue(lock.hasQueuedThread(t1));
1161	>	assertTrue(lock.hasQueuedThread(t2));
1162	>	writeLock.unlock();
1163	>	awaitTermination(t1);
1164	>	awaitTermination(t2);
1165	>	}
1166	>
1167	>	/**
1168	>	* await after multiple reentrant locking preserves lock count
1169	>	*/
1170	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1171	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1172	>	public void testAwaitLockCount(boolean fair) {
1173	>	final PublicReentrantReadWriteLock lock =
1174	>	new PublicReentrantReadWriteLock(fair);
1175	>	final Condition c = lock.writeLock().newCondition();
1176	>	final CountDownLatch locked = new CountDownLatch(2);
1177	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1178	>	public void realRun() throws InterruptedException {
1179	>	lock.writeLock().lock();
1180	>	assertWriteLockedByMoi(lock);
1181	>	assertEquals(1, lock.writeLock().getHoldCount());
1182	>	locked.countDown();
1183	>	c.await();
1184	>	assertWriteLockedByMoi(lock);
1185	>	assertEquals(1, lock.writeLock().getHoldCount());
1186	>	lock.writeLock().unlock();
1187	>	}});
1188	>
1189	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1190	>	public void realRun() throws InterruptedException {
1191	>	lock.writeLock().lock();
1192	>	lock.writeLock().lock();
1193	>	assertWriteLockedByMoi(lock);
1194	>	assertEquals(2, lock.writeLock().getHoldCount());
1195	>	locked.countDown();
1196	>	c.await();
1197	>	assertWriteLockedByMoi(lock);
1198	>	assertEquals(2, lock.writeLock().getHoldCount());
1199	>	lock.writeLock().unlock();
1200	>	lock.writeLock().unlock();
1201	>	}});
1202	>
1203	>	await(locked);
1204	>	lock.writeLock().lock();
1205	>	assertHasWaiters(lock, c, t1, t2);
1206	>	c.signalAll();
1207	>	assertHasNoWaiters(lock, c);
1208	>	lock.writeLock().unlock();
1209	>	awaitTermination(t1);
1210	>	awaitTermination(t2);
1211	>	}
1212	>
1213	>	/**
1214	>	* A serialized lock deserializes as unlocked
1215	>	*/
1216	>	public void testSerialization()      { testSerialization(false); }
1217	>	public void testSerialization_fair() { testSerialization(true); }
1218	>	public void testSerialization(boolean fair) {
1219	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1220	>	lock.writeLock().lock();
1221	>	lock.readLock().lock();
1222	>
1223	>	ReentrantReadWriteLock clone = serialClone(lock);
1224	>	assertEquals(lock.isFair(), clone.isFair());
1225	>	assertTrue(lock.isWriteLocked());
1226	>	assertFalse(clone.isWriteLocked());
1227	>	assertEquals(1, lock.getReadLockCount());
1228	>	assertEquals(0, clone.getReadLockCount());
1229	>	clone.writeLock().lock();
1230	>	clone.readLock().lock();
1231	>	assertTrue(clone.isWriteLocked());
1232	>	assertEquals(1, clone.getReadLockCount());
1233	>	clone.readLock().unlock();
1234	>	clone.writeLock().unlock();
1235	>	assertFalse(clone.isWriteLocked());
1236	>	assertEquals(1, lock.getReadLockCount());
1237	>	assertEquals(0, clone.getReadLockCount());
1238	>	}
1239	>
1240	>	/**
1241	>	* hasQueuedThreads reports whether there are waiting threads
1242	>	*/
1243	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1244	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1245	>	public void testHasQueuedThreads(boolean fair) {
1246	>	final PublicReentrantReadWriteLock lock =
1247	>	new PublicReentrantReadWriteLock(fair);
1248	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1249	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1250	>	assertFalse(lock.hasQueuedThreads());
1251	>	lock.writeLock().lock();
1252	>	assertFalse(lock.hasQueuedThreads());
1253	>	t1.start();
1254	>	waitForQueuedThread(lock, t1);
1255	>	assertTrue(lock.hasQueuedThreads());
1256	>	t2.start();
1257	>	waitForQueuedThread(lock, t2);
1258	>	assertTrue(lock.hasQueuedThreads());
1259	>	t1.interrupt();
1260	>	awaitTermination(t1);
1261	>	assertTrue(lock.hasQueuedThreads());
1262	>	lock.writeLock().unlock();
1263	>	awaitTermination(t2);
1264	>	assertFalse(lock.hasQueuedThreads());
1265	>	}
1266
1267	+	/**
1268	+	* hasQueuedThread(null) throws NPE
1269	+	*/
1270	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1271	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1272	+	public void testHasQueuedThreadNPE(boolean fair) {
1273	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1274		try {
1275	<	t.start();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1277	<	t.interrupt();
667	<	lock.writeLock().lock();
668	<	c.signal();
669	<	lock.writeLock().unlock();
670	<	assert(t.isInterrupted());
671	<	t.join(SHORT_DELAY_MS);
672	<	assertFalse(t.isAlive());
673	<	}
674	<	catch (Exception ex) {
675	<	unexpectedException();
676	<	}
1275	>	lock.hasQueuedThread(null);
1276	>	shouldThrow();
1277	>	} catch (NullPointerException success) {}
1278		}
1279
1280		/**
1281	<	* await is interruptible
1281	>	* hasQueuedThread reports whether a thread is queued.
1282		*/
1283	<	public void testAwait_Interrupt() {
1284	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1285	<	final Condition c = lock.writeLock().newCondition();
1286	<	Thread t = new Thread(new Runnable() {
1287	<	public void run() {
1288	<	try {
1289	<	lock.writeLock().lock();
1290	<	c.await();
1291	<	lock.writeLock().unlock();
1292	<	threadShouldThrow();
1293	<	}
1294	<	catch(InterruptedException success) {
1295	<	}
1296	<	}
1297	<	});
1283	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1284	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1285	>	public void testHasQueuedThread(boolean fair) {
1286	>	final PublicReentrantReadWriteLock lock =
1287	>	new PublicReentrantReadWriteLock(fair);
1288	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1289	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1290	>	assertFalse(lock.hasQueuedThread(t1));
1291	>	assertFalse(lock.hasQueuedThread(t2));
1292	>	lock.writeLock().lock();
1293	>	t1.start();
1294	>	waitForQueuedThread(lock, t1);
1295	>	assertTrue(lock.hasQueuedThread(t1));
1296	>	assertFalse(lock.hasQueuedThread(t2));
1297	>	t2.start();
1298	>	waitForQueuedThread(lock, t2);
1299	>	assertTrue(lock.hasQueuedThread(t1));
1300	>	assertTrue(lock.hasQueuedThread(t2));
1301	>	t1.interrupt();
1302	>	awaitTermination(t1);
1303	>	assertFalse(lock.hasQueuedThread(t1));
1304	>	assertTrue(lock.hasQueuedThread(t2));
1305	>	lock.writeLock().unlock();
1306	>	awaitTermination(t2);
1307	>	assertFalse(lock.hasQueuedThread(t1));
1308	>	assertFalse(lock.hasQueuedThread(t2));
1309	>	}
1310	>
1311	>	/**
1312	>	* getQueueLength reports number of waiting threads
1313	>	*/
1314	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1315	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1316	>	public void testGetQueueLength(boolean fair) {
1317	>	final PublicReentrantReadWriteLock lock =
1318	>	new PublicReentrantReadWriteLock(fair);
1319	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1320	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1321	>	assertEquals(0, lock.getQueueLength());
1322	>	lock.writeLock().lock();
1323	>	t1.start();
1324	>	waitForQueuedThread(lock, t1);
1325	>	assertEquals(1, lock.getQueueLength());
1326	>	t2.start();
1327	>	waitForQueuedThread(lock, t2);
1328	>	assertEquals(2, lock.getQueueLength());
1329	>	t1.interrupt();
1330	>	awaitTermination(t1);
1331	>	assertEquals(1, lock.getQueueLength());
1332	>	lock.writeLock().unlock();
1333	>	awaitTermination(t2);
1334	>	assertEquals(0, lock.getQueueLength());
1335	>	}
1336	>
1337	>	/**
1338	>	* getQueuedThreads includes waiting threads
1339	>	*/
1340	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1341	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1342	>	public void testGetQueuedThreads(boolean fair) {
1343	>	final PublicReentrantReadWriteLock lock =
1344	>	new PublicReentrantReadWriteLock(fair);
1345	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1346	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1347	>	assertTrue(lock.getQueuedThreads().isEmpty());
1348	>	lock.writeLock().lock();
1349	>	assertTrue(lock.getQueuedThreads().isEmpty());
1350	>	t1.start();
1351	>	waitForQueuedThread(lock, t1);
1352	>	assertEquals(1, lock.getQueuedThreads().size());
1353	>	assertTrue(lock.getQueuedThreads().contains(t1));
1354	>	t2.start();
1355	>	waitForQueuedThread(lock, t2);
1356	>	assertEquals(2, lock.getQueuedThreads().size());
1357	>	assertTrue(lock.getQueuedThreads().contains(t1));
1358	>	assertTrue(lock.getQueuedThreads().contains(t2));
1359	>	t1.interrupt();
1360	>	awaitTermination(t1);
1361	>	assertFalse(lock.getQueuedThreads().contains(t1));
1362	>	assertTrue(lock.getQueuedThreads().contains(t2));
1363	>	assertEquals(1, lock.getQueuedThreads().size());
1364	>	lock.writeLock().unlock();
1365	>	awaitTermination(t2);
1366	>	assertTrue(lock.getQueuedThreads().isEmpty());
1367	>	}
1368
1369	+	/**
1370	+	* hasWaiters throws NPE if null
1371	+	*/
1372	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1373	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1374	+	public void testHasWaitersNPE(boolean fair) {
1375	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1376		try {
1377	<	t.start();
1378	<	Thread.sleep(SHORT_DELAY_MS);
1379	<	t.interrupt();
702	<	t.join(SHORT_DELAY_MS);
703	<	assertFalse(t.isAlive());
704	<	}
705	<	catch (Exception ex) {
706	<	unexpectedException();
707	<	}
1377	>	lock.hasWaiters(null);
1378	>	shouldThrow();
1379	>	} catch (NullPointerException success) {}
1380		}
1381
1382		/**
1383	<	* awaitNanos is interruptible
1383	>	* getWaitQueueLength throws NPE if null
1384		*/
1385	<	public void testAwaitNanos_Interrupt() {
1386	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1387	<	final Condition c = lock.writeLock().newCondition();
1388	<	Thread t = new Thread(new Runnable() {
1389	<	public void run() {
1390	<	try {
1391	<	lock.writeLock().lock();
1392	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1393	<	lock.writeLock().unlock();
722	<	threadShouldThrow();
723	<	}
724	<	catch(InterruptedException success) {
725	<	}
726	<	}
727	<	});
1385	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1386	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1387	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1389	>	try {
1390	>	lock.getWaitQueueLength(null);
1391	>	shouldThrow();
1392	>	} catch (NullPointerException success) {}
1393	>	}
1394
1395	+	/**
1396	+	* getWaitingThreads throws NPE if null
1397	+	*/
1398	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1399	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1400	+	public void testGetWaitingThreadsNPE(boolean fair) {
1401	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1402		try {
1403	<	t.start();
1404	<	Thread.sleep(SHORT_DELAY_MS);
1405	<	t.interrupt();
733	<	t.join(SHORT_DELAY_MS);
734	<	assertFalse(t.isAlive());
735	<	}
736	<	catch (Exception ex) {
737	<	unexpectedException();
738	<	}
1403	>	lock.getWaitingThreads(null);
1404	>	shouldThrow();
1405	>	} catch (NullPointerException success) {}
1406		}
1407
1408		/**
1409	<	* awaitUntil is interruptible
1409	>	* hasWaiters throws IllegalArgumentException if not owned
1410		*/
1411	<	public void testAwaitUntil_Interrupt() {
1412	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1411	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1412	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1413	>	public void testHasWaitersIAE(boolean fair) {
1414	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1415		final Condition c = lock.writeLock().newCondition();
1416	<	Thread t = new Thread(new Runnable() {
1417	<	public void run() {
1418	<	try {
1419	<	lock.writeLock().lock();
1420	<	java.util.Date d = new java.util.Date();
1421	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
753	<	lock.writeLock().unlock();
754	<	threadShouldThrow();
755	<	}
756	<	catch(InterruptedException success) {
757	<	}
758	<	}
759	<	});
1416	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1417	>	try {
1418	>	lock2.hasWaiters(c);
1419	>	shouldThrow();
1420	>	} catch (IllegalArgumentException success) {}
1421	>	}
1422
1423	+	/**
1424	+	* hasWaiters throws IllegalMonitorStateException if not locked
1425	+	*/
1426	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1427	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1428	+	public void testHasWaitersIMSE(boolean fair) {
1429	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1430	+	final Condition c = lock.writeLock().newCondition();
1431		try {
1432	<	t.start();
1433	<	Thread.sleep(SHORT_DELAY_MS);
1434	<	t.interrupt();
765	<	t.join(SHORT_DELAY_MS);
766	<	assertFalse(t.isAlive());
767	<	}
768	<	catch (Exception ex) {
769	<	unexpectedException();
770	<	}
1432	>	lock.hasWaiters(c);
1433	>	shouldThrow();
1434	>	} catch (IllegalMonitorStateException success) {}
1435		}
1436
1437		/**
1438	<	* signalAll wakes up all threads
1438	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1439		*/
1440	<	public void testSignalAll() {
1441	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1440	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1441	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1442	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1443	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1444		final Condition c = lock.writeLock().newCondition();
1445	<	Thread t1 = new Thread(new Runnable() {
1446	<	public void run() {
1447	<	try {
1448	<	lock.writeLock().lock();
1449	<	c.await();
784	<	lock.writeLock().unlock();
785	<	}
786	<	catch(InterruptedException e) {
787	<	threadUnexpectedException();
788	<	}
789	<	}
790	<	});
791	<
792	<	Thread t2 = new Thread(new Runnable() {
793	<	public void run() {
794	<	try {
795	<	lock.writeLock().lock();
796	<	c.await();
797	<	lock.writeLock().unlock();
798	<	}
799	<	catch(InterruptedException e) {
800	<	threadUnexpectedException();
801	<	}
802	<	}
803	<	});
804	<
805	<	try {
806	<	t1.start();
807	<	t2.start();
808	<	Thread.sleep(SHORT_DELAY_MS);
809	<	lock.writeLock().lock();
810	<	c.signalAll();
811	<	lock.writeLock().unlock();
812	<	t1.join(SHORT_DELAY_MS);
813	<	t2.join(SHORT_DELAY_MS);
814	<	assertFalse(t1.isAlive());
815	<	assertFalse(t2.isAlive());
816	<	}
817	<	catch (Exception ex) {
818	<	unexpectedException();
819	<	}
1445	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1446	>	try {
1447	>	lock2.getWaitQueueLength(c);
1448	>	shouldThrow();
1449	>	} catch (IllegalArgumentException success) {}
1450		}
1451
1452		/**
1453	<	* A serialized lock deserializes as unlocked
1453	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1454		*/
1455	<	public void testSerialization() {
1456	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1457	<	l.readLock().lock();
1458	<	l.readLock().unlock();
1459	<
1460	<	try {
1461	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1462	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1463	<	out.writeObject(l);
834	<	out.close();
835	<
836	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
837	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
838	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
839	<	r.readLock().lock();
840	<	r.readLock().unlock();
841	<	} catch(Exception e){
842	<	e.printStackTrace();
843	<	unexpectedException();
844	<	}
1455	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1456	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1457	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1459	>	final Condition c = lock.writeLock().newCondition();
1460	>	try {
1461	>	lock.getWaitQueueLength(c);
1462	>	shouldThrow();
1463	>	} catch (IllegalMonitorStateException success) {}
1464		}
1465
1466		/**
1467	<	* getQueueLength reports number of waiting threads
1467	>	* getWaitingThreads throws IllegalArgumentException if not owned
1468		*/
1469	<	public void testGetQueueLength() {
1470	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1471	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1472	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1469	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1470	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1471	>	public void testGetWaitingThreadsIAE(boolean fair) {
1472	>	final PublicReentrantReadWriteLock lock =
1473	>	new PublicReentrantReadWriteLock(fair);
1474	>	final Condition c = lock.writeLock().newCondition();
1475	>	final PublicReentrantReadWriteLock lock2 =
1476	>	new PublicReentrantReadWriteLock(fair);
1477		try {
1478	<	assertEquals(0, lock.getQueueLength());
1479	<	lock.writeLock().lock();
1480	<	t1.start();
1481	<	Thread.sleep(SHORT_DELAY_MS);
859	<	assertEquals(1, lock.getQueueLength());
860	<	t2.start();
861	<	Thread.sleep(SHORT_DELAY_MS);
862	<	assertEquals(2, lock.getQueueLength());
863	<	t1.interrupt();
864	<	Thread.sleep(SHORT_DELAY_MS);
865	<	assertEquals(1, lock.getQueueLength());
866	<	lock.writeLock().unlock();
867	<	Thread.sleep(SHORT_DELAY_MS);
868	<	assertEquals(0, lock.getQueueLength());
869	<	t1.join();
870	<	t2.join();
871	<	} catch(Exception e){
872	<	unexpectedException();
873	<	}
874	<	}
1478	>	lock2.getWaitingThreads(c);
1479	>	shouldThrow();
1480	>	} catch (IllegalArgumentException success) {}
1481	>	}
1482
1483		/**
1484	<	* getQueuedThreads includes waiting threads
1484	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1485		*/
1486	<	public void testGetQueuedThreads() {
1487	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1488	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1489	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1486	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1487	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1488	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1489	>	final PublicReentrantReadWriteLock lock =
1490	>	new PublicReentrantReadWriteLock(fair);
1491	>	final Condition c = lock.writeLock().newCondition();
1492		try {
1493	<	assertTrue(lock.getQueuedThreads().isEmpty());
1494	<	lock.writeLock().lock();
1495	<	assertTrue(lock.getQueuedThreads().isEmpty());
1496	<	t1.start();
888	<	Thread.sleep(SHORT_DELAY_MS);
889	<	assertTrue(lock.getQueuedThreads().contains(t1));
890	<	t2.start();
891	<	Thread.sleep(SHORT_DELAY_MS);
892	<	assertTrue(lock.getQueuedThreads().contains(t1));
893	<	assertTrue(lock.getQueuedThreads().contains(t2));
894	<	t1.interrupt();
895	<	Thread.sleep(SHORT_DELAY_MS);
896	<	assertFalse(lock.getQueuedThreads().contains(t1));
897	<	assertTrue(lock.getQueuedThreads().contains(t2));
898	<	lock.writeLock().unlock();
899	<	Thread.sleep(SHORT_DELAY_MS);
900	<	assertTrue(lock.getQueuedThreads().isEmpty());
901	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1493	>	lock.getWaitingThreads(c);
1494	>	shouldThrow();
1495	>	} catch (IllegalMonitorStateException success) {}
1496	>	}
1497
1498		/**
1499		* hasWaiters returns true when a thread is waiting, else false
1500		*/
1501	<	public void testHasWaiters() {
1502	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1503	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1504	<	Thread t = new Thread(new Runnable() {
1505	<	public void run() {
1506	<	try {
1507	<	lock.writeLock().lock();
1508	<	threadAssertFalse(c.hasWaiters());
1509	<	threadAssertEquals(0, c.getWaitQueueLength());
1510	<	c.await();
1511	<	lock.writeLock().unlock();
1512	<	}
1513	<	catch(InterruptedException e) {
1514	<	threadUnexpectedException();
1515	<	}
1516	<	}
1517	<	});
1518	<
1519	<	try {
1520	<	t.start();
1521	<	Thread.sleep(SHORT_DELAY_MS);
1522	<	lock.writeLock().lock();
1523	<	assertTrue(c.hasWaiters());
1524	<	assertEquals(1, c.getWaitQueueLength());
1525	<	c.signal();
1526	<	lock.writeLock().unlock();
1527	<	Thread.sleep(SHORT_DELAY_MS);
1528	<	lock.writeLock().lock();
1529	<	assertFalse(c.hasWaiters());
940	<	assertEquals(0, c.getWaitQueueLength());
941	<	lock.writeLock().unlock();
942	<	t.join(SHORT_DELAY_MS);
943	<	assertFalse(t.isAlive());
944	<	}
945	<	catch (Exception ex) {
946	<	unexpectedException();
947	<	}
1501	>	public void testHasWaiters()      { testHasWaiters(false); }
1502	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1503	>	public void testHasWaiters(boolean fair) {
1504	>	final PublicReentrantReadWriteLock lock =
1505	>	new PublicReentrantReadWriteLock(fair);
1506	>	final Condition c = lock.writeLock().newCondition();
1507	>	final CountDownLatch locked = new CountDownLatch(1);
1508	>	Thread t = newStartedThread(new CheckedRunnable() {
1509	>	public void realRun() throws InterruptedException {
1510	>	lock.writeLock().lock();
1511	>	assertHasNoWaiters(lock, c);
1512	>	assertFalse(lock.hasWaiters(c));
1513	>	locked.countDown();
1514	>	c.await();
1515	>	assertHasNoWaiters(lock, c);
1516	>	assertFalse(lock.hasWaiters(c));
1517	>	lock.writeLock().unlock();
1518	>	}});
1519	>
1520	>	await(locked);
1521	>	lock.writeLock().lock();
1522	>	assertHasWaiters(lock, c, t);
1523	>	assertTrue(lock.hasWaiters(c));
1524	>	c.signal();
1525	>	assertHasNoWaiters(lock, c);
1526	>	assertFalse(lock.hasWaiters(c));
1527	>	lock.writeLock().unlock();
1528	>	awaitTermination(t);
1529	>	assertHasNoWaiters(lock, c);
1530		}
1531
1532		/**
1533		* getWaitQueueLength returns number of waiting threads
1534		*/
1535	<	public void testGetWaitQueueLength() {
1536	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1537	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1538	<	Thread t1 = new Thread(new Runnable() {
1539	<	public void run() {
1540	<	try {
1541	<	lock.writeLock().lock();
1542	<	threadAssertFalse(c.hasWaiters());
1543	<	threadAssertEquals(0, c.getWaitQueueLength());
1544	<	c.await();
1545	<	lock.writeLock().unlock();
1546	<	}
1547	<	catch(InterruptedException e) {
1548	<	threadUnexpectedException();
1549	<	}
1550	<	}
1551	<	});
1552	<
1553	<	Thread t2 = new Thread(new Runnable() {
1554	<	public void run() {
1555	<	try {
1556	<	lock.writeLock().lock();
1557	<	threadAssertTrue(c.hasWaiters());
1558	<	threadAssertEquals(1, c.getWaitQueueLength());
1559	<	c.await();
1560	<	lock.writeLock().unlock();
1561	<	}
1562	<	catch(InterruptedException e) {
1563	<	threadUnexpectedException();
1564	<	}
1565	<	}
1566	<	});
1567	<
1568	<	try {
1569	<	t1.start();
1570	<	Thread.sleep(SHORT_DELAY_MS);
1571	<	t2.start();
1572	<	Thread.sleep(SHORT_DELAY_MS);
1573	<	lock.writeLock().lock();
1574	<	assertTrue(c.hasWaiters());
1575	<	assertEquals(2, c.getWaitQueueLength());
1576	<	c.signalAll();
1577	<	lock.writeLock().unlock();
1578	<	Thread.sleep(SHORT_DELAY_MS);
1579	<	lock.writeLock().lock();
1580	<	assertFalse(c.hasWaiters());
1581	<	assertEquals(0, c.getWaitQueueLength());
1582	<	lock.writeLock().unlock();
1583	<	t1.join(SHORT_DELAY_MS);
1584	<	t2.join(SHORT_DELAY_MS);
1585	<	assertFalse(t1.isAlive());
1586	<	assertFalse(t2.isAlive());
1587	<	}
1588	<	catch (Exception ex) {
1589	<	unexpectedException();
1590	<	}
1535	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1536	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1537	>	public void testGetWaitQueueLength(boolean fair) {
1538	>	final PublicReentrantReadWriteLock lock =
1539	>	new PublicReentrantReadWriteLock(fair);
1540	>	final Condition c = lock.writeLock().newCondition();
1541	>	final CountDownLatch locked = new CountDownLatch(1);
1542	>	Thread t = newStartedThread(new CheckedRunnable() {
1543	>	public void realRun() throws InterruptedException {
1544	>	lock.writeLock().lock();
1545	>	assertEquals(0, lock.getWaitQueueLength(c));
1546	>	locked.countDown();
1547	>	c.await();
1548	>	lock.writeLock().unlock();
1549	>	}});
1550	>
1551	>	await(locked);
1552	>	lock.writeLock().lock();
1553	>	assertHasWaiters(lock, c, t);
1554	>	assertEquals(1, lock.getWaitQueueLength(c));
1555	>	c.signal();
1556	>	assertHasNoWaiters(lock, c);
1557	>	assertEquals(0, lock.getWaitQueueLength(c));
1558	>	lock.writeLock().unlock();
1559	>	awaitTermination(t);
1560	>	}
1561	>
1562	>	/**
1563	>	* getWaitingThreads returns only and all waiting threads
1564	>	*/
1565	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1566	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1567	>	public void testGetWaitingThreads(boolean fair) {
1568	>	final PublicReentrantReadWriteLock lock =
1569	>	new PublicReentrantReadWriteLock(fair);
1570	>	final Condition c = lock.writeLock().newCondition();
1571	>	final CountDownLatch locked1 = new CountDownLatch(1);
1572	>	final CountDownLatch locked2 = new CountDownLatch(1);
1573	>	Thread t1 = new Thread(new CheckedRunnable() {
1574	>	public void realRun() throws InterruptedException {
1575	>	lock.writeLock().lock();
1576	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1577	>	locked1.countDown();
1578	>	c.await();
1579	>	lock.writeLock().unlock();
1580	>	}});
1581	>
1582	>	Thread t2 = new Thread(new CheckedRunnable() {
1583	>	public void realRun() throws InterruptedException {
1584	>	lock.writeLock().lock();
1585	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1586	>	locked2.countDown();
1587	>	c.await();
1588	>	lock.writeLock().unlock();
1589	>	}});
1590	>
1591	>	lock.writeLock().lock();
1592	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1593	>	lock.writeLock().unlock();
1594	>
1595	>	t1.start();
1596	>	await(locked1);
1597	>	t2.start();
1598	>	await(locked2);
1599	>
1600	>	lock.writeLock().lock();
1601	>	assertTrue(lock.hasWaiters(c));
1602	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1603	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1604	>	assertEquals(2, lock.getWaitingThreads(c).size());
1605	>	c.signalAll();
1606	>	assertHasNoWaiters(lock, c);
1607	>	lock.writeLock().unlock();
1608	>
1609	>	awaitTermination(t1);
1610	>	awaitTermination(t2);
1611	>
1612	>	assertHasNoWaiters(lock, c);
1613	>	}
1614	>
1615	>	/**
1616	>	* toString indicates current lock state
1617	>	*/
1618	>	public void testToString()      { testToString(false); }
1619	>	public void testToString_fair() { testToString(true); }
1620	>	public void testToString(boolean fair) {
1621	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1622	>	String us = lock.toString();
1623	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1624	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1625	>	lock.writeLock().lock();
1626	>	String ws = lock.toString();
1627	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1628	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1629	>	lock.writeLock().unlock();
1630	>	lock.readLock().lock();
1631	>	lock.readLock().lock();
1632	>	String rs = lock.toString();
1633	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1634	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1635	>	}
1636	>
1637	>	/**
1638	>	* readLock.toString indicates current lock state
1639	>	*/
1640	>	public void testReadLockToString()      { testReadLockToString(false); }
1641	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1642	>	public void testReadLockToString(boolean fair) {
1643	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1644	>	String us = lock.readLock().toString();
1645	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1646	>	lock.readLock().lock();
1647	>	lock.readLock().lock();
1648	>	String rs = lock.readLock().toString();
1649	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1650	>	}
1651	>
1652	>	/**
1653	>	* writeLock.toString indicates current lock state
1654	>	*/
1655	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1656	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1657	>	public void testWriteLockToString(boolean fair) {
1658	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659	>	String us = lock.writeLock().toString();
1660	>	assertTrue(us.indexOf("Unlocked") >= 0);
1661	>	lock.writeLock().lock();
1662	>	String ls = lock.writeLock().toString();
1663	>	assertTrue(ls.indexOf("Locked") >= 0);
1664		}
1665	+
1666		}

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