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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.27 by dl, Thu May 18 10:29:23 2006 UTC vs.
Revision 1.67 by jsr166, Thu May 30 03:28:55 2013 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.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
10	>	import java.util.concurrent.atomic.AtomicBoolean;
11	>	import java.util.concurrent.locks.Condition;
12	>	import java.util.concurrent.locks.Lock;
13	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
16		import java.util.*;
17
18		public class ReentrantReadWriteLockTest extends JSR166TestCase {
19		public static void main(String[] args) {
20	<	junit.textui.TestRunner.run (suite());
20	>	junit.textui.TestRunner.run(suite());
21		}
22		public static Test suite() {
23	<	return new TestSuite(ReentrantReadWriteLockTest.class);
23	>	return new TestSuite(ReentrantReadWriteLockTest.class);
24		}
25
26		/**
27		* A runnable calling lockInterruptibly
28		*/
29	<	class InterruptibleLockRunnable implements Runnable {
29	>	class InterruptibleLockRunnable extends CheckedRunnable {
30		final ReentrantReadWriteLock lock;
31		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
32	<	public void run() {
33	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
32	>	public void realRun() throws InterruptedException {
33	>	lock.writeLock().lockInterruptibly();
34		}
35		}
36
36	–
37		/**
38		* A runnable calling lockInterruptibly that expects to be
39		* interrupted
40		*/
41	<	class InterruptedLockRunnable implements Runnable {
41	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
42		final ReentrantReadWriteLock lock;
43		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
44	<	public void run() {
45	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
44	>	public void realRun() throws InterruptedException {
45	>	lock.writeLock().lockInterruptibly();
46		}
47		}
48
#	Line 54 | Line 51 | public class ReentrantReadWriteLockTest
51		*/
52		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
53		PublicReentrantReadWriteLock() { super(); }
54	<	public Collection<Thread> getQueuedThreads() {
55	<	return super.getQueuedThreads();
54	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
55	>	public Thread getOwner() {
56	>	return super.getOwner();
57	>	}
58	>	public Collection<Thread> getQueuedThreads() {
59	>	return super.getQueuedThreads();
60		}
61	<	public Collection<Thread> getWaitingThreads(Condition c) {
62	<	return super.getWaitingThreads(c);
61	>	public Collection<Thread> getWaitingThreads(Condition c) {
62	>	return super.getWaitingThreads(c);
63		}
64		}
65
66		/**
67	<	* Constructor sets given fairness, and is in unlocked state
67	>	* Releases write lock, checking that it had a hold count of 1.
68		*/
69	<	public void testConstructor() {
70	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
71	<	assertFalse(rl.isFair());
72	<	assertFalse(rl.isWriteLocked());
73	<	assertEquals(0, rl.getReadLockCount());
74	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	<	assertTrue(r2.isFair());
75	<	assertFalse(r2.isWriteLocked());
76	<	assertEquals(0, r2.getReadLockCount());
69	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
70	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
71	>	assertWriteLockedByMoi(lock);
72	>	assertEquals(1, lock.getWriteHoldCount());
73	>	writeLock.unlock();
74	>	assertNotWriteLocked(lock);
75		}
76
77		/**
78	<	* write-locking and read-locking an unlocked lock succeed
78	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
79		*/
80	<	public void testLock() {
81	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	<	rl.writeLock().lock();
83	<	assertTrue(rl.isWriteLocked());
84	<	assertTrue(rl.isWriteLockedByCurrentThread());
85	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
86	<	assertEquals(0, rl.getReadLockCount());
87	<	rl.writeLock().unlock();
88	<	assertFalse(rl.isWriteLocked());
91	<	assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	<	assertEquals(0, rl.getReadLockCount());
94	<	rl.readLock().lock();
95	<	assertFalse(rl.isWriteLocked());
96	<	assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLockCount());
98	<	rl.readLock().unlock();
99	<	assertFalse(rl.isWriteLocked());
100	<	assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLockCount());
80	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
81	>	long startTime = System.nanoTime();
82	>	while (!lock.hasQueuedThread(t)) {
83	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
84	>	throw new AssertionFailedError("timed out");
85	>	Thread.yield();
86	>	}
87	>	assertTrue(t.isAlive());
88	>	assertNotSame(t, lock.getOwner());
89		}
90
104	–
91		/**
92	<	* locking an unlocked fair lock succeeds
93	<	*/
94	<	public void testFairLock() {
95	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
96	<	rl.writeLock().lock();
97	<	assertTrue(rl.isWriteLocked());
98	<	assertTrue(rl.isWriteLockedByCurrentThread());
99	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
100	<	assertEquals(0, rl.getReadLockCount());
115	<	rl.writeLock().unlock();
116	<	assertFalse(rl.isWriteLocked());
117	<	assertFalse(rl.isWriteLockedByCurrentThread());
118	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
119	<	assertEquals(0, rl.getReadLockCount());
120	<	rl.readLock().lock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(1, rl.getReadLockCount());
124	<	rl.readLock().unlock();
125	<	assertFalse(rl.isWriteLocked());
126	<	assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(0, rl.getReadLockCount());
92	>	* Checks that lock is not write-locked.
93	>	*/
94	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
95	>	assertFalse(lock.isWriteLocked());
96	>	assertFalse(lock.isWriteLockedByCurrentThread());
97	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
98	>	assertEquals(0, lock.getWriteHoldCount());
99	>	assertEquals(0, lock.writeLock().getHoldCount());
100	>	assertNull(lock.getOwner());
101		}
102
103		/**
104	<	* getWriteHoldCount returns number of recursive holds
104	>	* Checks that lock is write-locked by the given thread.
105		*/
106	<	public void testGetWriteHoldCount() {
107	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
108	<	for(int i = 1; i <= SIZE; i++) {
109	<	lock.writeLock().lock();
110	<	assertEquals(i,lock.getWriteHoldCount());
111	<	}
112	<	for(int i = SIZE; i > 0; i--) {
113	<	lock.writeLock().unlock();
114	<	assertEquals(i-1,lock.getWriteHoldCount());
115	<	}
106	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
107	>	assertTrue(lock.isWriteLocked());
108	>	assertSame(t, lock.getOwner());
109	>	assertEquals(t == Thread.currentThread(),
110	>	lock.isWriteLockedByCurrentThread());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.writeLock().isHeldByCurrentThread());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.getWriteHoldCount() > 0);
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.writeLock().getHoldCount() > 0);
117	>	assertEquals(0, lock.getReadLockCount());
118		}
119
120		/**
121	<	* WriteLock.getHoldCount returns number of recursive holds
122	<	*/
123	<	public void testGetHoldCount() {
124	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	for(int i = 1; i <= SIZE; i++) {
151	<	lock.writeLock().lock();
152	<	assertEquals(i,lock.writeLock().getHoldCount());
153	<	}
154	<	for(int i = SIZE; i > 0; i--) {
155	<	lock.writeLock().unlock();
156	<	assertEquals(i-1,lock.writeLock().getHoldCount());
157	<	}
121	>	* Checks that lock is write-locked by the current thread.
122	>	*/
123	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
124	>	assertWriteLockedBy(lock, Thread.currentThread());
125		}
126
127		/**
128	<	* getReadHoldCount returns number of recursive holds
128	>	* Checks that condition c has no waiters.
129		*/
130	<	public void testGetReadHoldCount() {
131	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	for(int i = 1; i <= SIZE; i++) {
166	<	lock.readLock().lock();
167	<	assertEquals(i,lock.getReadHoldCount());
168	<	}
169	<	for(int i = SIZE; i > 0; i--) {
170	<	lock.readLock().unlock();
171	<	assertEquals(i-1,lock.getReadHoldCount());
172	<	}
130	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
131	>	assertHasWaiters(lock, c, new Thread[] {});
132		}
174	–
133
134		/**
135	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
135	>	* Checks that condition c has exactly the given waiter threads.
136		*/
137	<	public void testUnlock_IllegalMonitorStateException() {
138	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
139	<	try {
140	<	rl.writeLock().unlock();
141	<	shouldThrow();
142	<	} catch(IllegalMonitorStateException success){}
137	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
138	>	Thread... threads) {
139	>	lock.writeLock().lock();
140	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
141	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
142	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
143	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
144	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
145	>	new HashSet<Thread>(Arrays.asList(threads)));
146	>	lock.writeLock().unlock();
147		}
148
149	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
150
151		/**
152	<	* write-lockInterruptibly is interruptible
152	>	* Awaits condition using the specified AwaitMethod.
153		*/
154	<	public void testWriteLockInterruptibly_Interrupted() {
155	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
156	<	Thread t = new Thread(new Runnable() {
157	<	public void run() {
158	<	try {
159	<	lock.writeLock().lockInterruptibly();
160	<	lock.writeLock().unlock();
161	<	lock.writeLock().lockInterruptibly();
162	<	lock.writeLock().unlock();
163	<	} catch(InterruptedException success){}
164	<	}
165	<	});
166	<	try {
167	<	lock.writeLock().lock();
168	<	t.start();
169	<	Thread.sleep(SHORT_DELAY_MS);
170	<	t.interrupt();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	lock.writeLock().unlock();
210	<	t.join();
211	<	} catch(Exception e){
212	<	unexpectedException();
154	>	void await(Condition c, AwaitMethod awaitMethod)
155	>	throws InterruptedException {
156	>	switch (awaitMethod) {
157	>	case await:
158	>	c.await();
159	>	break;
160	>	case awaitTimed:
161	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
162	>	break;
163	>	case awaitNanos:
164	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
165	>	assertTrue(nanosRemaining > 0);
166	>	break;
167	>	case awaitUntil:
168	>	java.util.Date d = new java.util.Date();
169	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
170	>	break;
171		}
172	<	}
172	>	}
173
174		/**
175	<	* timed write-tryLock is interruptible
175	>	* Constructor sets given fairness, and is in unlocked state
176		*/
177	<	public void testWriteTryLock_Interrupted() {
178	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
179	<	lock.writeLock().lock();
180	<	Thread t = new Thread(new Runnable() {
181	<	public void run() {
182	<	try {
183	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
184	<	} catch(InterruptedException success){}
185	<	}
186	<	});
187	<	try {
188	<	t.start();
189	<	t.interrupt();
190	<	lock.writeLock().unlock();
191	<	t.join();
192	<	} catch(Exception e){
193	<	unexpectedException();
236	<	}
177	>	public void testConstructor() {
178	>	PublicReentrantReadWriteLock lock;
179	>
180	>	lock = new PublicReentrantReadWriteLock();
181	>	assertFalse(lock.isFair());
182	>	assertNotWriteLocked(lock);
183	>	assertEquals(0, lock.getReadLockCount());
184	>
185	>	lock = new PublicReentrantReadWriteLock(true);
186	>	assertTrue(lock.isFair());
187	>	assertNotWriteLocked(lock);
188	>	assertEquals(0, lock.getReadLockCount());
189	>
190	>	lock = new PublicReentrantReadWriteLock(false);
191	>	assertFalse(lock.isFair());
192	>	assertNotWriteLocked(lock);
193	>	assertEquals(0, lock.getReadLockCount());
194		}
195
196		/**
197	<	* read-lockInterruptibly is interruptible
197	>	* write-locking and read-locking an unlocked lock succeed
198		*/
199	<	public void testReadLockInterruptibly_Interrupted() {
200	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
201	<	lock.writeLock().lock();
202	<	Thread t = new Thread(new Runnable() {
203	<	public void run() {
204	<	try {
205	<	lock.readLock().lockInterruptibly();
206	<	} catch(InterruptedException success){}
207	<	}
208	<	});
209	<	try {
210	<	t.start();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	t.interrupt();
213	<	Thread.sleep(SHORT_DELAY_MS);
199	>	public void testLock()      { testLock(false); }
200	>	public void testLock_fair() { testLock(true); }
201	>	public void testLock(boolean fair) {
202	>	PublicReentrantReadWriteLock lock =
203	>	new PublicReentrantReadWriteLock(fair);
204	>	assertNotWriteLocked(lock);
205	>	lock.writeLock().lock();
206	>	assertWriteLockedByMoi(lock);
207	>	lock.writeLock().unlock();
208	>	assertNotWriteLocked(lock);
209	>	assertEquals(0, lock.getReadLockCount());
210	>	lock.readLock().lock();
211	>	assertNotWriteLocked(lock);
212	>	assertEquals(1, lock.getReadLockCount());
213	>	lock.readLock().unlock();
214	>	assertNotWriteLocked(lock);
215	>	assertEquals(0, lock.getReadLockCount());
216	>	}
217	>
218	>	/**
219	>	* getWriteHoldCount returns number of recursive holds
220	>	*/
221	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
222	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
223	>	public void testGetWriteHoldCount(boolean fair) {
224	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
225	>	for (int i = 1; i <= SIZE; i++) {
226	>	lock.writeLock().lock();
227	>	assertEquals(i,lock.getWriteHoldCount());
228	>	}
229	>	for (int i = SIZE; i > 0; i--) {
230		lock.writeLock().unlock();
231	<	t.join();
259	<	} catch(Exception e){
260	<	unexpectedException();
231	>	assertEquals(i-1,lock.getWriteHoldCount());
232		}
233	<	}
233	>	}
234
235		/**
236	<	* timed read-tryLock is interruptible
236	>	* writelock.getHoldCount returns number of recursive holds
237		*/
238	<	public void testReadTryLock_Interrupted() {
239	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
240	<	lock.writeLock().lock();
241	<	Thread t = new Thread(new Runnable() {
242	<	public void run() {
243	<	try {
244	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
245	<	threadShouldThrow();
246	<	} catch(InterruptedException success){}
247	<	}
248	<	});
278	<	try {
279	<	t.start();
280	<	t.interrupt();
281	<	t.join();
282	<	} catch(Exception e){
283	<	unexpectedException();
238	>	public void testGetHoldCount()      { testGetHoldCount(false); }
239	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
240	>	public void testGetHoldCount(boolean fair) {
241	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
242	>	for (int i = 1; i <= SIZE; i++) {
243	>	lock.writeLock().lock();
244	>	assertEquals(i,lock.writeLock().getHoldCount());
245	>	}
246	>	for (int i = SIZE; i > 0; i--) {
247	>	lock.writeLock().unlock();
248	>	assertEquals(i-1,lock.writeLock().getHoldCount());
249		}
250		}
251
287	–
252		/**
253	<	* write-tryLock fails if locked
253	>	* getReadHoldCount returns number of recursive holds
254		*/
255	<	public void testWriteTryLockWhenLocked() {
256	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
257	<	lock.writeLock().lock();
258	<	Thread t = new Thread(new Runnable() {
259	<	public void run() {
260	<	threadAssertFalse(lock.writeLock().tryLock());
261	<	}
262	<	});
263	<	try {
264	<	t.start();
265	<	t.join();
302	<	lock.writeLock().unlock();
303	<	} catch(Exception e){
304	<	unexpectedException();
255	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
256	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
257	>	public void testGetReadHoldCount(boolean fair) {
258	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
259	>	for (int i = 1; i <= SIZE; i++) {
260	>	lock.readLock().lock();
261	>	assertEquals(i,lock.getReadHoldCount());
262	>	}
263	>	for (int i = SIZE; i > 0; i--) {
264	>	lock.readLock().unlock();
265	>	assertEquals(i-1,lock.getReadHoldCount());
266		}
267	<	}
267	>	}
268
269		/**
270	<	* read-tryLock fails if locked
270	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
271		*/
272	<	public void testReadTryLockWhenLocked() {
273	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
274	<	lock.writeLock().lock();
275	<	Thread t = new Thread(new Runnable() {
315	<	public void run() {
316	<	threadAssertFalse(lock.readLock().tryLock());
317	<	}
318	<	});
272	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
273	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
274	>	public void testWriteUnlock_IMSE(boolean fair) {
275	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
276		try {
320	–	t.start();
321	–	t.join();
277		lock.writeLock().unlock();
278	<	} catch(Exception e){
279	<	unexpectedException();
280	<	}
326	<	}
278	>	shouldThrow();
279	>	} catch (IllegalMonitorStateException success) {}
280	>	}
281
282		/**
283	<	* Multiple threads can hold a read lock when not write-locked
283	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
284		*/
285	<	public void testMultipleReadLocks() {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287	<	lock.readLock().lock();
288	<	Thread t = new Thread(new Runnable() {
335	<	public void run() {
336	<	threadAssertTrue(lock.readLock().tryLock());
337	<	lock.readLock().unlock();
338	<	}
339	<	});
285	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
286	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
287	>	public void testReadUnlock_IMSE(boolean fair) {
288	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
289		try {
341	–	t.start();
342	–	t.join();
290		lock.readLock().unlock();
291	<	} catch(Exception e){
292	<	unexpectedException();
293	<	}
347	<	}
291	>	shouldThrow();
292	>	} catch (IllegalMonitorStateException success) {}
293	>	}
294
295		/**
296	<	* A writelock succeeds after reading threads unlock
296	>	* write-lockInterruptibly is interruptible
297		*/
298	<	public void testWriteAfterMultipleReadLocks() {
299	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
300	<	lock.readLock().lock();
301	<	Thread t1 = new Thread(new Runnable() {
302	<	public void run() {
303	<	lock.readLock().lock();
304	<	lock.readLock().unlock();
305	<	}
306	<	});
307	<	Thread t2 = new Thread(new Runnable() {
362	<	public void run() {
363	<	lock.writeLock().lock();
364	<	lock.writeLock().unlock();
365	<	}
366	<	});
298	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
299	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
300	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
301	>	final PublicReentrantReadWriteLock lock =
302	>	new PublicReentrantReadWriteLock(fair);
303	>	lock.writeLock().lock();
304	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
305	>	public void realRun() throws InterruptedException {
306	>	lock.writeLock().lockInterruptibly();
307	>	}});
308
309	<	try {
310	<	t1.start();
311	<	t2.start();
312	<	Thread.sleep(SHORT_DELAY_MS);
313	<	lock.readLock().unlock();
373	<	t1.join(MEDIUM_DELAY_MS);
374	<	t2.join(MEDIUM_DELAY_MS);
375	<	assertTrue(!t1.isAlive());
376	<	assertTrue(!t2.isAlive());
377	<
378	<	} catch(Exception e){
379	<	unexpectedException();
380	<	}
381	<	}
309	>	waitForQueuedThread(lock, t);
310	>	t.interrupt();
311	>	awaitTermination(t);
312	>	releaseWriteLock(lock);
313	>	}
314
315		/**
316	<	* Readlocks succeed after a writing thread unlocks
316	>	* timed write-tryLock is interruptible
317		*/
318	<	public void testReadAfterWriteLock() {
319	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	<	lock.writeLock().lock();
321	<	Thread t1 = new Thread(new Runnable() {
322	<	public void run() {
323	<	lock.readLock().lock();
324	<	lock.readLock().unlock();
325	<	}
326	<	});
327	<	Thread t2 = new Thread(new Runnable() {
328	<	public void run() {
329	<	lock.readLock().lock();
330	<	lock.readLock().unlock();
331	<	}
332	<	});
318	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
319	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
320	>	public void testWriteTryLock_Interruptible(boolean fair) {
321	>	final PublicReentrantReadWriteLock lock =
322	>	new PublicReentrantReadWriteLock(fair);
323	>	lock.writeLock().lock();
324	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
325	>	public void realRun() throws InterruptedException {
326	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
327	>	}});
328	>
329	>	waitForQueuedThread(lock, t);
330	>	t.interrupt();
331	>	awaitTermination(t);
332	>	releaseWriteLock(lock);
333	>	}
334
335	<	try {
336	<	t1.start();
337	<	t2.start();
338	<	Thread.sleep(SHORT_DELAY_MS);
339	<	lock.writeLock().unlock();
340	<	t1.join(MEDIUM_DELAY_MS);
341	<	t2.join(MEDIUM_DELAY_MS);
342	<	assertTrue(!t1.isAlive());
343	<	assertTrue(!t2.isAlive());
344	<
345	<	} catch(Exception e){
346	<	unexpectedException();
347	<	}
348	<	}
335	>	/**
336	>	* read-lockInterruptibly is interruptible
337	>	*/
338	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
339	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
340	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
341	>	final PublicReentrantReadWriteLock lock =
342	>	new PublicReentrantReadWriteLock(fair);
343	>	lock.writeLock().lock();
344	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
345	>	public void realRun() throws InterruptedException {
346	>	lock.readLock().lockInterruptibly();
347	>	}});
348	>
349	>	waitForQueuedThread(lock, t);
350	>	t.interrupt();
351	>	awaitTermination(t);
352	>	releaseWriteLock(lock);
353	>	}
354
355		/**
356	<	* Read trylock succeeds if write locked by current thread
356	>	* timed read-tryLock is interruptible
357		*/
358	<	public void testReadHoldingWriteLock() {
359	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
360	<	lock.writeLock().lock();
361	<	assertTrue(lock.readLock().tryLock());
362	<	lock.readLock().unlock();
358	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
359	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
360	>	public void testReadTryLock_Interruptible(boolean fair) {
361	>	final PublicReentrantReadWriteLock lock =
362	>	new PublicReentrantReadWriteLock(fair);
363	>	lock.writeLock().lock();
364	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
365	>	public void realRun() throws InterruptedException {
366	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
367	>	}});
368	>
369	>	waitForQueuedThread(lock, t);
370	>	t.interrupt();
371	>	awaitTermination(t);
372	>	releaseWriteLock(lock);
373	>	}
374	>
375	>	/**
376	>	* write-tryLock on an unlocked lock succeeds
377	>	*/
378	>	public void testWriteTryLock()      { testWriteTryLock(false); }
379	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
380	>	public void testWriteTryLock(boolean fair) {
381	>	final PublicReentrantReadWriteLock lock =
382	>	new PublicReentrantReadWriteLock(fair);
383	>	assertTrue(lock.writeLock().tryLock());
384	>	assertWriteLockedByMoi(lock);
385	>	assertTrue(lock.writeLock().tryLock());
386	>	assertWriteLockedByMoi(lock);
387		lock.writeLock().unlock();
388	<	}
388	>	releaseWriteLock(lock);
389	>	}
390
391		/**
392	<	* Read lock succeeds if write locked by current thread even if
430	<	* other threads are waiting for readlock
392	>	* write-tryLock fails if locked
393		*/
394	<	public void testReadHoldingWriteLock2() {
395	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
396	<	lock.writeLock().lock();
397	<	Thread t1 = new Thread(new Runnable() {
398	<	public void run() {
399	<	lock.readLock().lock();
400	<	lock.readLock().unlock();
401	<	}
402	<	});
403	<	Thread t2 = new Thread(new Runnable() {
442	<	public void run() {
443	<	lock.readLock().lock();
444	<	lock.readLock().unlock();
445	<	}
446	<	});
394	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
395	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
396	>	public void testWriteTryLockWhenLocked(boolean fair) {
397	>	final PublicReentrantReadWriteLock lock =
398	>	new PublicReentrantReadWriteLock(fair);
399	>	lock.writeLock().lock();
400	>	Thread t = newStartedThread(new CheckedRunnable() {
401	>	public void realRun() {
402	>	assertFalse(lock.writeLock().tryLock());
403	>	}});
404
405	<	try {
406	<	t1.start();
407	<	t2.start();
451	<	lock.readLock().lock();
452	<	lock.readLock().unlock();
453	<	Thread.sleep(SHORT_DELAY_MS);
454	<	lock.readLock().lock();
455	<	lock.readLock().unlock();
456	<	lock.writeLock().unlock();
457	<	t1.join(MEDIUM_DELAY_MS);
458	<	t2.join(MEDIUM_DELAY_MS);
459	<	assertTrue(!t1.isAlive());
460	<	assertTrue(!t2.isAlive());
461	<
462	<	} catch(Exception e){
463	<	unexpectedException();
464	<	}
465	<	}
405	>	awaitTermination(t);
406	>	releaseWriteLock(lock);
407	>	}
408
409		/**
410	<	*  Read lock succeeds if write locked by current thread even if
469	<	* other threads are waiting for writelock
410	>	* read-tryLock fails if locked
411		*/
412	<	public void testReadHoldingWriteLock3() {
413	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
414	<	lock.writeLock().lock();
415	<	Thread t1 = new Thread(new Runnable() {
416	<	public void run() {
417	<	lock.writeLock().lock();
418	<	lock.writeLock().unlock();
419	<	}
420	<	});
421	<	Thread t2 = new Thread(new Runnable() {
481	<	public void run() {
482	<	lock.writeLock().lock();
483	<	lock.writeLock().unlock();
484	<	}
485	<	});
412	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
413	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
414	>	public void testReadTryLockWhenLocked(boolean fair) {
415	>	final PublicReentrantReadWriteLock lock =
416	>	new PublicReentrantReadWriteLock(fair);
417	>	lock.writeLock().lock();
418	>	Thread t = newStartedThread(new CheckedRunnable() {
419	>	public void realRun() {
420	>	assertFalse(lock.readLock().tryLock());
421	>	}});
422
423	<	try {
424	<	t1.start();
425	<	t2.start();
490	<	lock.readLock().lock();
491	<	lock.readLock().unlock();
492	<	Thread.sleep(SHORT_DELAY_MS);
493	<	lock.readLock().lock();
494	<	lock.readLock().unlock();
495	<	lock.writeLock().unlock();
496	<	t1.join(MEDIUM_DELAY_MS);
497	<	t2.join(MEDIUM_DELAY_MS);
498	<	assertTrue(!t1.isAlive());
499	<	assertTrue(!t2.isAlive());
500	<
501	<	} catch(Exception e){
502	<	unexpectedException();
503	<	}
504	<	}
423	>	awaitTermination(t);
424	>	releaseWriteLock(lock);
425	>	}
426
427	+	/**
428	+	* Multiple threads can hold a read lock when not write-locked
429	+	*/
430	+	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
431	+	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
432	+	public void testMultipleReadLocks(boolean fair) {
433	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
434	+	lock.readLock().lock();
435	+	Thread t = newStartedThread(new CheckedRunnable() {
436	+	public void realRun() throws InterruptedException {
437	+	assertTrue(lock.readLock().tryLock());
438	+	lock.readLock().unlock();
439	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
440	+	lock.readLock().unlock();
441	+	lock.readLock().lock();
442	+	lock.readLock().unlock();
443	+	}});
444	+
445	+	awaitTermination(t);
446	+	lock.readLock().unlock();
447	+	}
448
449		/**
450	<	*  Write lock succeeds if write locked by current thread even if
509	<	* other threads are waiting for writelock
450	>	* A writelock succeeds only after a reading thread unlocks
451		*/
452	<	public void testWriteHoldingWriteLock4() {
453	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
454	<	lock.writeLock().lock();
455	<	Thread t1 = new Thread(new Runnable() {
456	<	public void run() {
457	<	lock.writeLock().lock();
458	<	lock.writeLock().unlock();
459	<	}
460	<	});
461	<	Thread t2 = new Thread(new Runnable() {
462	<	public void run() {
463	<	lock.writeLock().lock();
464	<	lock.writeLock().unlock();
465	<	}
466	<	});
452	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
453	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
454	>	public void testWriteAfterReadLock(boolean fair) {
455	>	final PublicReentrantReadWriteLock lock =
456	>	new PublicReentrantReadWriteLock(fair);
457	>	lock.readLock().lock();
458	>	Thread t = newStartedThread(new CheckedRunnable() {
459	>	public void realRun() {
460	>	assertEquals(1, lock.getReadLockCount());
461	>	lock.writeLock().lock();
462	>	assertEquals(0, lock.getReadLockCount());
463	>	lock.writeLock().unlock();
464	>	}});
465	>	waitForQueuedThread(lock, t);
466	>	assertNotWriteLocked(lock);
467	>	assertEquals(1, lock.getReadLockCount());
468	>	lock.readLock().unlock();
469	>	assertEquals(0, lock.getReadLockCount());
470	>	awaitTermination(t);
471	>	assertNotWriteLocked(lock);
472	>	}
473
474	<	try {
475	<	t1.start();
476	<	t2.start();
477	<	lock.writeLock().lock();
478	<	lock.writeLock().unlock();
479	<	Thread.sleep(SHORT_DELAY_MS);
480	<	lock.writeLock().lock();
481	<	lock.writeLock().unlock();
482	<	lock.writeLock().unlock();
483	<	t1.join(MEDIUM_DELAY_MS);
484	<	t2.join(MEDIUM_DELAY_MS);
485	<	assertTrue(!t1.isAlive());
486	<	assertTrue(!t2.isAlive());
487	<
488	<	} catch(Exception e){
489	<	unexpectedException();
490	<	}
491	<	}
474	>	/**
475	>	* A writelock succeeds only after reading threads unlock
476	>	*/
477	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
478	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
479	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
480	>	final PublicReentrantReadWriteLock lock =
481	>	new PublicReentrantReadWriteLock(fair);
482	>	lock.readLock().lock();
483	>	lock.readLock().lock();
484	>	Thread t1 = newStartedThread(new CheckedRunnable() {
485	>	public void realRun() {
486	>	lock.readLock().lock();
487	>	assertEquals(3, lock.getReadLockCount());
488	>	lock.readLock().unlock();
489	>	}});
490	>	awaitTermination(t1);
491	>
492	>	Thread t2 = newStartedThread(new CheckedRunnable() {
493	>	public void realRun() {
494	>	assertEquals(2, lock.getReadLockCount());
495	>	lock.writeLock().lock();
496	>	assertEquals(0, lock.getReadLockCount());
497	>	lock.writeLock().unlock();
498	>	}});
499	>	waitForQueuedThread(lock, t2);
500	>	assertNotWriteLocked(lock);
501	>	assertEquals(2, lock.getReadLockCount());
502	>	lock.readLock().unlock();
503	>	lock.readLock().unlock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	awaitTermination(t2);
506	>	assertNotWriteLocked(lock);
507	>	}
508
509	+	/**
510	+	* A thread that tries to acquire a fair read lock (non-reentrantly)
511	+	* will block if there is a waiting writer thread
512	+	*/
513	+	public void testReaderWriterReaderFairFifo() {
514	+	final PublicReentrantReadWriteLock lock =
515	+	new PublicReentrantReadWriteLock(true);
516	+	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
517	+
518	+	lock.readLock().lock();
519	+	Thread t1 = newStartedThread(new CheckedRunnable() {
520	+	public void realRun() {
521	+	assertEquals(1, lock.getReadLockCount());
522	+	lock.writeLock().lock();
523	+	assertEquals(0, lock.getReadLockCount());
524	+	t1GotLock.set(true);
525	+	lock.writeLock().unlock();
526	+	}});
527	+	waitForQueuedThread(lock, t1);
528	+
529	+	Thread t2 = newStartedThread(new CheckedRunnable() {
530	+	public void realRun() {
531	+	assertEquals(1, lock.getReadLockCount());
532	+	lock.readLock().lock();
533	+	assertEquals(1, lock.getReadLockCount());
534	+	assertTrue(t1GotLock.get());
535	+	lock.readLock().unlock();
536	+	}});
537	+	waitForQueuedThread(lock, t2);
538	+	assertTrue(t1.isAlive());
539	+	assertNotWriteLocked(lock);
540	+	assertEquals(1, lock.getReadLockCount());
541	+	lock.readLock().unlock();
542	+	awaitTermination(t1);
543	+	awaitTermination(t2);
544	+	assertNotWriteLocked(lock);
545	+	}
546
547		/**
548	<	* Fair Read trylock succeeds if write locked by current thread
548	>	* Readlocks succeed only after a writing thread unlocks
549		*/
550	<	public void testReadHoldingWriteLockFair() {
551	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
552	<	lock.writeLock().lock();
550	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
551	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
552	>	public void testReadAfterWriteLock(boolean fair) {
553	>	final PublicReentrantReadWriteLock lock =
554	>	new PublicReentrantReadWriteLock(fair);
555	>	lock.writeLock().lock();
556	>	Thread t1 = newStartedThread(new CheckedRunnable() {
557	>	public void realRun() {
558	>	lock.readLock().lock();
559	>	lock.readLock().unlock();
560	>	}});
561	>	Thread t2 = newStartedThread(new CheckedRunnable() {
562	>	public void realRun() {
563	>	lock.readLock().lock();
564	>	lock.readLock().unlock();
565	>	}});
566	>
567	>	waitForQueuedThread(lock, t1);
568	>	waitForQueuedThread(lock, t2);
569	>	releaseWriteLock(lock);
570	>	awaitTermination(t1);
571	>	awaitTermination(t2);
572	>	}
573	>
574	>	/**
575	>	* Read trylock succeeds if write locked by current thread
576	>	*/
577	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
578	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
579	>	public void testReadHoldingWriteLock(boolean fair) {
580	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
581	>	lock.writeLock().lock();
582		assertTrue(lock.readLock().tryLock());
583		lock.readLock().unlock();
584		lock.writeLock().unlock();
585	<	}
585	>	}
586
587		/**
588	<	* Fair Read lock succeeds if write locked by current thread even if
589	<	* other threads are waiting for readlock
588	>	* Read trylock succeeds (barging) even in the presence of waiting
589	>	* readers and/or writers
590		*/
591	<	public void testReadHoldingWriteLockFair2() {
592	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
593	<	lock.writeLock().lock();
594	<	Thread t1 = new Thread(new Runnable() {
595	<	public void run() {
596	<	lock.readLock().lock();
568	<	lock.readLock().unlock();
569	<	}
570	<	});
571	<	Thread t2 = new Thread(new Runnable() {
572	<	public void run() {
573	<	lock.readLock().lock();
574	<	lock.readLock().unlock();
575	<	}
576	<	});
591	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
592	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
593	>	public void testReadTryLockBarging(boolean fair) {
594	>	final PublicReentrantReadWriteLock lock =
595	>	new PublicReentrantReadWriteLock(fair);
596	>	lock.readLock().lock();
597
598	<	try {
599	<	t1.start();
600	<	t2.start();
601	<	lock.readLock().lock();
602	<	lock.readLock().unlock();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	lock.readLock().lock();
585	<	lock.readLock().unlock();
586	<	lock.writeLock().unlock();
587	<	t1.join(MEDIUM_DELAY_MS);
588	<	t2.join(MEDIUM_DELAY_MS);
589	<	assertTrue(!t1.isAlive());
590	<	assertTrue(!t2.isAlive());
591	<
592	<	} catch(Exception e){
593	<	unexpectedException();
594	<	}
595	<	}
598	>	Thread t1 = newStartedThread(new CheckedRunnable() {
599	>	public void realRun() {
600	>	lock.writeLock().lock();
601	>	lock.writeLock().unlock();
602	>	}});
603	>
604	>	waitForQueuedThread(lock, t1);
605
606	+	Thread t2 = newStartedThread(new CheckedRunnable() {
607	+	public void realRun() {
608	+	lock.readLock().lock();
609	+	lock.readLock().unlock();
610	+	}});
611	+
612	+	if (fair)
613	+	waitForQueuedThread(lock, t2);
614	+
615	+	Thread t3 = newStartedThread(new CheckedRunnable() {
616	+	public void realRun() {
617	+	lock.readLock().tryLock();
618	+	lock.readLock().unlock();
619	+	}});
620	+
621	+	assertTrue(lock.getReadLockCount() > 0);
622	+	awaitTermination(t3);
623	+	assertTrue(t1.isAlive());
624	+	if (fair) assertTrue(t2.isAlive());
625	+	lock.readLock().unlock();
626	+	awaitTermination(t1);
627	+	awaitTermination(t2);
628	+	}
629
630		/**
631	<	* Fair Read lock succeeds if write locked by current thread even if
631	>	* Read lock succeeds if write locked by current thread even if
632	>	* other threads are waiting for readlock
633	>	*/
634	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
635	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
636	>	public void testReadHoldingWriteLock2(boolean fair) {
637	>	final PublicReentrantReadWriteLock lock =
638	>	new PublicReentrantReadWriteLock(fair);
639	>	lock.writeLock().lock();
640	>	lock.readLock().lock();
641	>	lock.readLock().unlock();
642	>
643	>	Thread t1 = newStartedThread(new CheckedRunnable() {
644	>	public void realRun() {
645	>	lock.readLock().lock();
646	>	lock.readLock().unlock();
647	>	}});
648	>	Thread t2 = newStartedThread(new CheckedRunnable() {
649	>	public void realRun() {
650	>	lock.readLock().lock();
651	>	lock.readLock().unlock();
652	>	}});
653	>
654	>	waitForQueuedThread(lock, t1);
655	>	waitForQueuedThread(lock, t2);
656	>	assertWriteLockedByMoi(lock);
657	>	lock.readLock().lock();
658	>	lock.readLock().unlock();
659	>	releaseWriteLock(lock);
660	>	awaitTermination(t1);
661	>	awaitTermination(t2);
662	>	}
663	>
664	>	/**
665	>	* Read lock succeeds if write locked by current thread even if
666		* other threads are waiting for writelock
667		*/
668	<	public void testReadHoldingWriteLockFair3() {
669	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
670	<	lock.writeLock().lock();
671	<	Thread t1 = new Thread(new Runnable() {
672	<	public void run() {
673	<	lock.writeLock().lock();
674	<	lock.writeLock().unlock();
675	<	}
610	<	});
611	<	Thread t2 = new Thread(new Runnable() {
612	<	public void run() {
613	<	lock.writeLock().lock();
614	<	lock.writeLock().unlock();
615	<	}
616	<	});
668	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
669	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
670	>	public void testReadHoldingWriteLock3(boolean fair) {
671	>	final PublicReentrantReadWriteLock lock =
672	>	new PublicReentrantReadWriteLock(fair);
673	>	lock.writeLock().lock();
674	>	lock.readLock().lock();
675	>	lock.readLock().unlock();
676
677	<	try {
678	<	t1.start();
679	<	t2.start();
680	<	lock.readLock().lock();
681	<	lock.readLock().unlock();
682	<	Thread.sleep(SHORT_DELAY_MS);
683	<	lock.readLock().lock();
684	<	lock.readLock().unlock();
685	<	lock.writeLock().unlock();
686	<	t1.join(MEDIUM_DELAY_MS);
628	<	t2.join(MEDIUM_DELAY_MS);
629	<	assertTrue(!t1.isAlive());
630	<	assertTrue(!t2.isAlive());
631	<
632	<	} catch(Exception e){
633	<	unexpectedException();
634	<	}
635	<	}
677	>	Thread t1 = newStartedThread(new CheckedRunnable() {
678	>	public void realRun() {
679	>	lock.writeLock().lock();
680	>	lock.writeLock().unlock();
681	>	}});
682	>	Thread t2 = newStartedThread(new CheckedRunnable() {
683	>	public void realRun() {
684	>	lock.writeLock().lock();
685	>	lock.writeLock().unlock();
686	>	}});
687
688	+	waitForQueuedThread(lock, t1);
689	+	waitForQueuedThread(lock, t2);
690	+	assertWriteLockedByMoi(lock);
691	+	lock.readLock().lock();
692	+	lock.readLock().unlock();
693	+	assertWriteLockedByMoi(lock);
694	+	lock.writeLock().unlock();
695	+	awaitTermination(t1);
696	+	awaitTermination(t2);
697	+	}
698
699		/**
700	<	* Fair Write lock succeeds if write locked by current thread even if
700	>	* Write lock succeeds if write locked by current thread even if
701		* other threads are waiting for writelock
702		*/
703	<	public void testWriteHoldingWriteLockFair4() {
704	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
705	<	lock.writeLock().lock();
706	<	Thread t1 = new Thread(new Runnable() {
707	<	public void run() {
708	<	lock.writeLock().lock();
709	<	lock.writeLock().unlock();
710	<	}
650	<	});
651	<	Thread t2 = new Thread(new Runnable() {
652	<	public void run() {
653	<	lock.writeLock().lock();
654	<	lock.writeLock().unlock();
655	<	}
656	<	});
703	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
704	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
705	>	public void testWriteHoldingWriteLock4(boolean fair) {
706	>	final PublicReentrantReadWriteLock lock =
707	>	new PublicReentrantReadWriteLock(fair);
708	>	lock.writeLock().lock();
709	>	lock.writeLock().lock();
710	>	lock.writeLock().unlock();
711
712	<	try {
713	<	t1.start();
714	<	t2.start();
715	<	Thread.sleep(SHORT_DELAY_MS);
716	<	assertTrue(lock.isWriteLockedByCurrentThread());
717	<	assertTrue(lock.getWriteHoldCount() == 1);
718	<	lock.writeLock().lock();
719	<	assertTrue(lock.getWriteHoldCount() == 2);
720	<	lock.writeLock().unlock();
721	<	lock.writeLock().lock();
668	<	lock.writeLock().unlock();
669	<	lock.writeLock().unlock();
670	<	t1.join(MEDIUM_DELAY_MS);
671	<	t2.join(MEDIUM_DELAY_MS);
672	<	assertTrue(!t1.isAlive());
673	<	assertTrue(!t2.isAlive());
674	<
675	<	} catch(Exception e){
676	<	unexpectedException();
677	<	}
678	<	}
712	>	Thread t1 = newStartedThread(new CheckedRunnable() {
713	>	public void realRun() {
714	>	lock.writeLock().lock();
715	>	lock.writeLock().unlock();
716	>	}});
717	>	Thread t2 = newStartedThread(new CheckedRunnable() {
718	>	public void realRun() {
719	>	lock.writeLock().lock();
720	>	lock.writeLock().unlock();
721	>	}});
722
723	+	waitForQueuedThread(lock, t1);
724	+	waitForQueuedThread(lock, t2);
725	+	assertWriteLockedByMoi(lock);
726	+	assertEquals(1, lock.getWriteHoldCount());
727	+	lock.writeLock().lock();
728	+	assertWriteLockedByMoi(lock);
729	+	assertEquals(2, lock.getWriteHoldCount());
730	+	lock.writeLock().unlock();
731	+	assertWriteLockedByMoi(lock);
732	+	assertEquals(1, lock.getWriteHoldCount());
733	+	lock.writeLock().unlock();
734	+	awaitTermination(t1);
735	+	awaitTermination(t2);
736	+	}
737
738		/**
739		* Read tryLock succeeds if readlocked but not writelocked
740		*/
741	<	public void testTryLockWhenReadLocked() {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	<	lock.readLock().lock();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	threadAssertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}
749	<	});
750	<	try {
694	<	t.start();
695	<	t.join();
696	<	lock.readLock().unlock();
697	<	} catch(Exception e){
698	<	unexpectedException();
699	<	}
700	<	}
741	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
742	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
743	>	public void testTryLockWhenReadLocked(boolean fair) {
744	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
745	>	lock.readLock().lock();
746	>	Thread t = newStartedThread(new CheckedRunnable() {
747	>	public void realRun() {
748	>	assertTrue(lock.readLock().tryLock());
749	>	lock.readLock().unlock();
750	>	}});
751
752	<
752	>	awaitTermination(t);
753	>	lock.readLock().unlock();
754	>	}
755
756		/**
757		* write tryLock fails when readlocked
758		*/
759	<	public void testWriteTryLockWhenReadLocked() {
760	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761	<	lock.readLock().lock();
762	<	Thread t = new Thread(new Runnable() {
763	<	public void run() {
764	<	threadAssertFalse(lock.writeLock().tryLock());
765	<	}
766	<	});
767	<	try {
716	<	t.start();
717	<	t.join();
718	<	lock.readLock().unlock();
719	<	} catch(Exception e){
720	<	unexpectedException();
721	<	}
722	<	}
759	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
760	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
761	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
762	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
763	>	lock.readLock().lock();
764	>	Thread t = newStartedThread(new CheckedRunnable() {
765	>	public void realRun() {
766	>	assertFalse(lock.writeLock().tryLock());
767	>	}});
768
769	+	awaitTermination(t);
770	+	lock.readLock().unlock();
771	+	}
772
773		/**
774	<	* Fair Read tryLock succeeds if readlocked but not writelocked
774	>	* write timed tryLock times out if locked
775		*/
776	<	public void testTryLockWhenReadLockedFair() {
777	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
778	<	lock.readLock().lock();
779	<	Thread t = new Thread(new Runnable() {
780	<	public void run() {
781	<	threadAssertTrue(lock.readLock().tryLock());
782	<	lock.readLock().unlock();
783	<	}
784	<	});
785	<	try {
786	<	t.start();
787	<	t.join();
788	<	lock.readLock().unlock();
741	<	} catch(Exception e){
742	<	unexpectedException();
743	<	}
744	<	}
776	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
777	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
778	>	public void testWriteTryLock_Timeout(boolean fair) {
779	>	final PublicReentrantReadWriteLock lock =
780	>	new PublicReentrantReadWriteLock(fair);
781	>	lock.writeLock().lock();
782	>	Thread t = newStartedThread(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	long startTime = System.nanoTime();
785	>	long timeoutMillis = 10;
786	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
787	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
788	>	}});
789
790	<
790	>	awaitTermination(t);
791	>	releaseWriteLock(lock);
792	>	}
793
794		/**
795	<	* Fair write tryLock fails when readlocked
795	>	* read timed tryLock times out if write-locked
796		*/
797	<	public void testWriteTryLockWhenReadLockedFair() {
798	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
799	<	lock.readLock().lock();
800	<	Thread t = new Thread(new Runnable() {
801	<	public void run() {
802	<	threadAssertFalse(lock.writeLock().tryLock());
803	<	}
804	<	});
805	<	try {
806	<	t.start();
807	<	t.join();
808	<	lock.readLock().unlock();
763	<	} catch(Exception e){
764	<	unexpectedException();
765	<	}
766	<	}
767	<
768	<
797	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
798	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
799	>	public void testReadTryLock_Timeout(boolean fair) {
800	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
801	>	lock.writeLock().lock();
802	>	Thread t = newStartedThread(new CheckedRunnable() {
803	>	public void realRun() throws InterruptedException {
804	>	long startTime = System.nanoTime();
805	>	long timeoutMillis = 10;
806	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
807	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
808	>	}});
809
810	<	/**
811	<	* write timed tryLock times out if locked
812	<	*/
813	<	public void testWriteTryLock_Timeout() {
774	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
775	<	lock.writeLock().lock();
776	<	Thread t = new Thread(new Runnable() {
777	<	public void run() {
778	<	try {
779	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
780	<	} catch (Exception ex) {
781	<	threadUnexpectedException();
782	<	}
783	<	}
784	<	});
785	<	try {
786	<	t.start();
787	<	t.join();
788	<	lock.writeLock().unlock();
789	<	} catch(Exception e){
790	<	unexpectedException();
791	<	}
792	<	}
810	>	awaitTermination(t);
811	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
812	>	lock.writeLock().unlock();
813	>	}
814
815		/**
816	<	* read timed tryLock times out if write-locked
816	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
817		*/
818	<	public void testReadTryLock_Timeout() {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820	<	lock.writeLock().lock();
821	<	Thread t = new Thread(new Runnable() {
822	<	public void run() {
802	<	try {
803	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
804	<	} catch (Exception ex) {
805	<	threadUnexpectedException();
806	<	}
807	<	}
808	<	});
818	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
819	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
820	>	public void testWriteLockInterruptibly(boolean fair) {
821	>	final PublicReentrantReadWriteLock lock =
822	>	new PublicReentrantReadWriteLock(fair);
823		try {
824	<	t.start();
825	<	t.join();
826	<	lock.writeLock().unlock();
813	<	} catch(Exception e){
814	<	unexpectedException();
824	>	lock.writeLock().lockInterruptibly();
825	>	} catch (InterruptedException ie) {
826	>	threadUnexpectedException(ie);
827		}
828	<	}
828	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
829	>	public void realRun() throws InterruptedException {
830	>	lock.writeLock().lockInterruptibly();
831	>	}});
832
833	+	waitForQueuedThread(lock, t);
834	+	t.interrupt();
835	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
836	+	awaitTermination(t);
837	+	releaseWriteLock(lock);
838	+	}
839
840		/**
841	<	* write lockInterruptibly succeeds if lock free else is interruptible
841	>	* read lockInterruptibly succeeds if lock free else is interruptible
842		*/
843	<	public void testWriteLockInterruptibly() {
844	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845	<	try {
846	<	lock.writeLock().lockInterruptibly();
847	<	} catch(Exception e) {
827	<	unexpectedException();
828	<	}
829	<	Thread t = new Thread(new Runnable() {
830	<	public void run() {
831	<	try {
832	<	lock.writeLock().lockInterruptibly();
833	<	threadShouldThrow();
834	<	}
835	<	catch(InterruptedException success) {
836	<	}
837	<	}
838	<	});
843	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
844	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
845	>	public void testReadLockInterruptibly(boolean fair) {
846	>	final PublicReentrantReadWriteLock lock =
847	>	new PublicReentrantReadWriteLock(fair);
848		try {
849	<	t.start();
850	<	Thread.sleep(SHORT_DELAY_MS);
851	<	t.interrupt();
852	<	Thread.sleep(SHORT_DELAY_MS);
853	<	t.join();
845	<	lock.writeLock().unlock();
846	<	} catch(Exception e){
847	<	unexpectedException();
849	>	lock.readLock().lockInterruptibly();
850	>	lock.readLock().unlock();
851	>	lock.writeLock().lockInterruptibly();
852	>	} catch (InterruptedException ie) {
853	>	threadUnexpectedException(ie);
854		}
855	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
856	+	public void realRun() throws InterruptedException {
857	+	lock.readLock().lockInterruptibly();
858	+	}});
859	+
860	+	waitForQueuedThread(lock, t);
861	+	t.interrupt();
862	+	awaitTermination(t);
863	+	releaseWriteLock(lock);
864		}
865
866		/**
867	<	*  read lockInterruptibly succeeds if lock free else is interruptible
867	>	* Calling await without holding lock throws IllegalMonitorStateException
868		*/
869	<	public void testReadLockInterruptibly() {
870	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
871	<	try {
872	<	lock.writeLock().lockInterruptibly();
873	<	} catch(Exception e) {
874	<	unexpectedException();
875	<	}
876	<	Thread t = new Thread(new Runnable() {
877	<	public void run() {
878	<	try {
879	<	lock.readLock().lockInterruptibly();
880	<	threadShouldThrow();
881	<	}
867	<	catch(InterruptedException success) {
868	<	}
869	<	}
870	<	});
871	<	try {
872	<	t.start();
873	<	Thread.sleep(SHORT_DELAY_MS);
874	<	t.interrupt();
875	<	t.join();
876	<	lock.writeLock().unlock();
877	<	} catch(Exception e){
878	<	unexpectedException();
869	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
870	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
871	>	public void testAwait_IMSE(boolean fair) {
872	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
873	>	final Condition c = lock.writeLock().newCondition();
874	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
875	>	long startTime = System.nanoTime();
876	>	try {
877	>	await(c, awaitMethod);
878	>	shouldThrow();
879	>	} catch (IllegalMonitorStateException success) {
880	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
881	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
882		}
883		}
884
885		/**
886	<	* Calling await without holding lock throws IllegalMonitorStateException
886	>	* Calling signal without holding lock throws IllegalMonitorStateException
887		*/
888	<	public void testAwait_IllegalMonitor() {
889	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
889	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
890	>	public void testSignal_IMSE(boolean fair) {
891	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
892		final Condition c = lock.writeLock().newCondition();
893		try {
894	<	c.await();
890	<	shouldThrow();
891	<	}
892	<	catch (IllegalMonitorStateException success) {
893	<	}
894	<	catch (Exception ex) {
894	>	c.signal();
895		shouldThrow();
896	<	}
896	>	} catch (IllegalMonitorStateException success) {}
897		}
898
899		/**
900	<	* Calling signal without holding lock throws IllegalMonitorStateException
900	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
901		*/
902	<	public void testSignal_IllegalMonitor() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
903	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
904	>	public void testSignalAll_IMSE(boolean fair) {
905	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
906		final Condition c = lock.writeLock().newCondition();
907		try {
908	<	c.signal();
908	>	c.signalAll();
909		shouldThrow();
910	<	}
909	<	catch (IllegalMonitorStateException success) {
910	<	}
911	<	catch (Exception ex) {
912	<	unexpectedException();
913	<	}
910	>	} catch (IllegalMonitorStateException success) {}
911		}
912
913		/**
914		* awaitNanos without a signal times out
915		*/
916	<	public void testAwaitNanos_Timeout() {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918	<	final Condition c = lock.writeLock().newCondition();
916	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
917	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
918	>	public void testAwaitNanos_Timeout(boolean fair) {
919		try {
920	+	final ReentrantReadWriteLock lock =
921	+	new ReentrantReadWriteLock(fair);
922	+	final Condition c = lock.writeLock().newCondition();
923		lock.writeLock().lock();
924	<	long t = c.awaitNanos(100);
925	<	assertTrue(t <= 0);
924	>	long startTime = System.nanoTime();
925	>	long timeoutMillis = 10;
926	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
927	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
928	>	assertTrue(nanosRemaining <= 0);
929	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
930		lock.writeLock().unlock();
931	<	}
932	<	catch (Exception ex) {
929	<	unexpectedException();
931	>	} catch (InterruptedException e) {
932	>	threadUnexpectedException(e);
933		}
934		}
935
933	–
936		/**
937	<	*  timed await without a signal times out
937	>	* timed await without a signal times out
938		*/
939	<	public void testAwait_Timeout() {
940	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
941	<	final Condition c = lock.writeLock().newCondition();
939	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
940	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
941	>	public void testAwait_Timeout(boolean fair) {
942		try {
943	+	final ReentrantReadWriteLock lock =
944	+	new ReentrantReadWriteLock(fair);
945	+	final Condition c = lock.writeLock().newCondition();
946		lock.writeLock().lock();
947	+	long startTime = System.nanoTime();
948	+	long timeoutMillis = 10;
949	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
950	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
951		lock.writeLock().unlock();
952	<	}
953	<	catch (Exception ex) {
945	<	unexpectedException();
952	>	} catch (InterruptedException e) {
953	>	threadUnexpectedException(e);
954		}
955		}
956
957		/**
958		* awaitUntil without a signal times out
959		*/
960	<	public void testAwaitUntil_Timeout() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
962	<	final Condition c = lock.writeLock().newCondition();
963	<	try {
960	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
961	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
962	>	public void testAwaitUntil_Timeout(boolean fair) {
963	>	try {
964	>	final ReentrantReadWriteLock lock =
965	>	new ReentrantReadWriteLock(fair);
966	>	final Condition c = lock.writeLock().newCondition();
967		lock.writeLock().lock();
968	+	long startTime = System.nanoTime();
969	+	long timeoutMillis = 10;
970		java.util.Date d = new java.util.Date();
971	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
972	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
973		lock.writeLock().unlock();
974	<	}
975	<	catch (Exception ex) {
961	<	unexpectedException();
974	>	} catch (InterruptedException e) {
975	>	threadUnexpectedException(e);
976		}
977		}
978
979		/**
980		* await returns when signalled
981		*/
982	<	public void testAwait() {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
982	>	public void testAwait()      { testAwait(false); }
983	>	public void testAwait_fair() { testAwait(true); }
984	>	public void testAwait(boolean fair) {
985	>	final PublicReentrantReadWriteLock lock =
986	>	new PublicReentrantReadWriteLock(fair);
987		final Condition c = lock.writeLock().newCondition();
988	<	Thread t = new Thread(new Runnable() {
989	<	public void run() {
990	<	try {
991	<	lock.writeLock().lock();
992	<	c.await();
993	<	lock.writeLock().unlock();
994	<	}
995	<	catch(InterruptedException e) {
979	<	threadUnexpectedException();
980	<	}
981	<	}
982	<	});
983	<
984	<	try {
985	<	t.start();
986	<	Thread.sleep(SHORT_DELAY_MS);
987	<	lock.writeLock().lock();
988	<	c.signal();
989	<	lock.writeLock().unlock();
990	<	t.join(SHORT_DELAY_MS);
991	<	assertFalse(t.isAlive());
992	<	}
993	<	catch (Exception ex) {
994	<	unexpectedException();
995	<	}
996	<	}
988	>	final CountDownLatch locked = new CountDownLatch(1);
989	>	Thread t = newStartedThread(new CheckedRunnable() {
990	>	public void realRun() throws InterruptedException {
991	>	lock.writeLock().lock();
992	>	locked.countDown();
993	>	c.await();
994	>	lock.writeLock().unlock();
995	>	}});
996
997	<	/** A helper class for uninterruptible wait tests */
998	<	class UninterruptableThread extends Thread {
999	<	private Lock lock;
1000	<	private Condition c;
1001	<
1002	<	public volatile boolean canAwake = false;
1003	<	public volatile boolean interrupted = false;
1004	<	public volatile boolean lockStarted = false;
1006	<
1007	<	public UninterruptableThread(Lock lock, Condition c) {
1008	<	this.lock = lock;
1009	<	this.c = c;
1010	<	}
1011	<
1012	<	public synchronized void run() {
1013	<	lock.lock();
1014	<	lockStarted = true;
1015	<
1016	<	while (!canAwake) {
1017	<	c.awaitUninterruptibly();
1018	<	}
1019	<
1020	<	interrupted = isInterrupted();
1021	<	lock.unlock();
1022	<	}
997	>	await(locked);
998	>	lock.writeLock().lock();
999	>	assertHasWaiters(lock, c, t);
1000	>	c.signal();
1001	>	assertHasNoWaiters(lock, c);
1002	>	assertTrue(t.isAlive());
1003	>	lock.writeLock().unlock();
1004	>	awaitTermination(t);
1005		}
1006
1007		/**
1008	<	* awaitUninterruptibly doesn't abort on interrupt
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010	<	public void testAwaitUninterruptibly() {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1014		final Condition c = lock.writeLock().newCondition();
1015	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016
1017	<	try {
1018	<	thread.start();
1019	<
1020	<	while (!thread.lockStarted) {
1021	<	Thread.sleep(100);
1022	<	}
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.writeLock().lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	c.awaitUninterruptibly();
1024	>	assertTrue(Thread.interrupted());
1025	>	lock.writeLock().unlock();
1026	>	}});
1027
1028	<	lock.writeLock().lock();
1029	<	try {
1030	<	thread.interrupt();
1031	<	thread.canAwake = true;
1032	<	c.signal();
1033	<	} finally {
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.writeLock().lock();
1032	>	pleaseInterrupt.countDown();
1033	>	c.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035		lock.writeLock().unlock();
1036	<	}
1036	>	}});
1037
1038	<	thread.join();
1039	<	assertTrue(thread.interrupted);
1040	<	assertFalse(thread.isAlive());
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1038	>	await(pleaseInterrupt);
1039	>	lock.writeLock().lock();
1040	>	lock.writeLock().unlock();
1041	>	t2.interrupt();
1042	>
1043	>	assertThreadStaysAlive(t1);
1044	>	assertTrue(t2.isAlive());
1045	>
1046	>	lock.writeLock().lock();
1047	>	c.signalAll();
1048	>	lock.writeLock().unlock();
1049	>
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054		/**
1055	<	* await is interruptible
1055	>	* await/awaitNanos/awaitUntil is interruptible
1056		*/
1057	<	public void testAwait_Interrupt() {
1058	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1057	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1058	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1059	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1061	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1063	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1065	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1066	>	final PublicReentrantReadWriteLock lock =
1067	>	new PublicReentrantReadWriteLock(fair);
1068		final Condition c = lock.writeLock().newCondition();
1069	<	Thread t = new Thread(new Runnable() {
1070	<	public void run() {
1071	<	try {
1072	<	lock.writeLock().lock();
1073	<	c.await();
1074	<	lock.writeLock().unlock();
1075	<	threadShouldThrow();
1076	<	}
1077	<	catch(InterruptedException success) {
1078	<	}
1079	<	}
1080	<	});
1081	<
1082	<	try {
1083	<	t.start();
1084	<	Thread.sleep(SHORT_DELAY_MS);
1085	<	t.interrupt();
1086	<	t.join(SHORT_DELAY_MS);
1087	<	assertFalse(t.isAlive());
1088	<	}
1089	<	catch (Exception ex) {
1090	<	unexpectedException();
1085	<	}
1069	>	final CountDownLatch locked = new CountDownLatch(1);
1070	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1071	>	public void realRun() throws InterruptedException {
1072	>	lock.writeLock().lock();
1073	>	assertWriteLockedByMoi(lock);
1074	>	assertHasNoWaiters(lock, c);
1075	>	locked.countDown();
1076	>	try {
1077	>	await(c, awaitMethod);
1078	>	} finally {
1079	>	assertWriteLockedByMoi(lock);
1080	>	assertHasNoWaiters(lock, c);
1081	>	lock.writeLock().unlock();
1082	>	assertFalse(Thread.interrupted());
1083	>	}
1084	>	}});
1085	>
1086	>	await(locked);
1087	>	assertHasWaiters(lock, c, t);
1088	>	t.interrupt();
1089	>	awaitTermination(t);
1090	>	assertNotWriteLocked(lock);
1091		}
1092
1093		/**
1094	<	* awaitNanos is interruptible
1094	>	* signalAll wakes up all threads
1095		*/
1096	<	public void testAwaitNanos_Interrupt() {
1097	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1096	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1097	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1098	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1100	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1102	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1104	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1105	>	final PublicReentrantReadWriteLock lock =
1106	>	new PublicReentrantReadWriteLock(fair);
1107		final Condition c = lock.writeLock().newCondition();
1108	<	Thread t = new Thread(new Runnable() {
1109	<	public void run() {
1110	<	try {
1111	<	lock.writeLock().lock();
1112	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1113	<	lock.writeLock().unlock();
1114	<	threadShouldThrow();
1115	<	}
1116	<	catch(InterruptedException success) {
1103	<	}
1104	<	}
1105	<	});
1106	<
1107	<	try {
1108	<	t.start();
1109	<	Thread.sleep(SHORT_DELAY_MS);
1110	<	t.interrupt();
1111	<	t.join(SHORT_DELAY_MS);
1112	<	assertFalse(t.isAlive());
1113	<	}
1114	<	catch (Exception ex) {
1115	<	unexpectedException();
1108	>	final CountDownLatch locked = new CountDownLatch(2);
1109	>	final Lock writeLock = lock.writeLock();
1110	>	class Awaiter extends CheckedRunnable {
1111	>	public void realRun() throws InterruptedException {
1112	>	writeLock.lock();
1113	>	locked.countDown();
1114	>	await(c, awaitMethod);
1115	>	writeLock.unlock();
1116	>	}
1117		}
1118	+
1119	+	Thread t1 = newStartedThread(new Awaiter());
1120	+	Thread t2 = newStartedThread(new Awaiter());
1121	+
1122	+	await(locked);
1123	+	writeLock.lock();
1124	+	assertHasWaiters(lock, c, t1, t2);
1125	+	c.signalAll();
1126	+	assertHasNoWaiters(lock, c);
1127	+	writeLock.unlock();
1128	+	awaitTermination(t1);
1129	+	awaitTermination(t2);
1130		}
1131
1132		/**
1133	<	* awaitUntil is interruptible
1134	<	*/
1135	<	public void testAwaitUntil_Interrupt() {
1136	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1133	>	* signal wakes up waiting threads in FIFO order
1134	>	*/
1135	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1136	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1137	>	public void testSignalWakesFifo(boolean fair) {
1138	>	final PublicReentrantReadWriteLock lock =
1139	>	new PublicReentrantReadWriteLock(fair);
1140		final Condition c = lock.writeLock().newCondition();
1141	<	Thread t = new Thread(new Runnable() {
1142	<	public void run() {
1143	<	try {
1144	<	lock.writeLock().lock();
1145	<	java.util.Date d = new java.util.Date();
1146	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1147	<	lock.writeLock().unlock();
1148	<	threadShouldThrow();
1149	<	}
1150	<	catch(InterruptedException success) {
1151	<	}
1152	<	}
1153	<	});
1154	<
1155	<	try {
1156	<	t.start();
1157	<	Thread.sleep(SHORT_DELAY_MS);
1158	<	t.interrupt();
1159	<	t.join(SHORT_DELAY_MS);
1160	<	assertFalse(t.isAlive());
1161	<	}
1162	<	catch (Exception ex) {
1163	<	unexpectedException();
1164	<	}
1141	>	final CountDownLatch locked1 = new CountDownLatch(1);
1142	>	final CountDownLatch locked2 = new CountDownLatch(1);
1143	>	final Lock writeLock = lock.writeLock();
1144	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1145	>	public void realRun() throws InterruptedException {
1146	>	writeLock.lock();
1147	>	locked1.countDown();
1148	>	c.await();
1149	>	writeLock.unlock();
1150	>	}});
1151	>
1152	>	await(locked1);
1153	>
1154	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1155	>	public void realRun() throws InterruptedException {
1156	>	writeLock.lock();
1157	>	locked2.countDown();
1158	>	c.await();
1159	>	writeLock.unlock();
1160	>	}});
1161	>
1162	>	await(locked2);
1163	>
1164	>	writeLock.lock();
1165	>	assertHasWaiters(lock, c, t1, t2);
1166	>	assertFalse(lock.hasQueuedThreads());
1167	>	c.signal();
1168	>	assertHasWaiters(lock, c, t2);
1169	>	assertTrue(lock.hasQueuedThread(t1));
1170	>	assertFalse(lock.hasQueuedThread(t2));
1171	>	c.signal();
1172	>	assertHasNoWaiters(lock, c);
1173	>	assertTrue(lock.hasQueuedThread(t1));
1174	>	assertTrue(lock.hasQueuedThread(t2));
1175	>	writeLock.unlock();
1176	>	awaitTermination(t1);
1177	>	awaitTermination(t2);
1178		}
1179
1180		/**
1181	<	* signalAll wakes up all threads
1182	<	*/
1183	<	public void testSignalAll() {
1184	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1181	>	* await after multiple reentrant locking preserves lock count
1182	>	*/
1183	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1184	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1185	>	public void testAwaitLockCount(boolean fair) {
1186	>	final PublicReentrantReadWriteLock lock =
1187	>	new PublicReentrantReadWriteLock(fair);
1188		final Condition c = lock.writeLock().newCondition();
1189	<	Thread t1 = new Thread(new Runnable() {
1190	<	public void run() {
1191	<	try {
1192	<	lock.writeLock().lock();
1193	<	c.await();
1194	<	lock.writeLock().unlock();
1195	<	}
1196	<	catch(InterruptedException e) {
1197	<	threadUnexpectedException();
1198	<	}
1199	<	}
1200	<	});
1169	<
1170	<	Thread t2 = new Thread(new Runnable() {
1171	<	public void run() {
1172	<	try {
1173	<	lock.writeLock().lock();
1174	<	c.await();
1175	<	lock.writeLock().unlock();
1176	<	}
1177	<	catch(InterruptedException e) {
1178	<	threadUnexpectedException();
1179	<	}
1180	<	}
1181	<	});
1189	>	final CountDownLatch locked = new CountDownLatch(2);
1190	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1191	>	public void realRun() throws InterruptedException {
1192	>	lock.writeLock().lock();
1193	>	assertWriteLockedByMoi(lock);
1194	>	assertEquals(1, lock.writeLock().getHoldCount());
1195	>	locked.countDown();
1196	>	c.await();
1197	>	assertWriteLockedByMoi(lock);
1198	>	assertEquals(1, lock.writeLock().getHoldCount());
1199	>	lock.writeLock().unlock();
1200	>	}});
1201
1202	<	try {
1203	<	t1.start();
1204	<	t2.start();
1205	<	Thread.sleep(SHORT_DELAY_MS);
1206	<	lock.writeLock().lock();
1207	<	c.signalAll();
1208	<	lock.writeLock().unlock();
1209	<	t1.join(SHORT_DELAY_MS);
1210	<	t2.join(SHORT_DELAY_MS);
1211	<	assertFalse(t1.isAlive());
1212	<	assertFalse(t2.isAlive());
1213	<	}
1214	<	catch (Exception ex) {
1215	<	unexpectedException();
1216	<	}
1202	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1203	>	public void realRun() throws InterruptedException {
1204	>	lock.writeLock().lock();
1205	>	lock.writeLock().lock();
1206	>	assertWriteLockedByMoi(lock);
1207	>	assertEquals(2, lock.writeLock().getHoldCount());
1208	>	locked.countDown();
1209	>	c.await();
1210	>	assertWriteLockedByMoi(lock);
1211	>	assertEquals(2, lock.writeLock().getHoldCount());
1212	>	lock.writeLock().unlock();
1213	>	lock.writeLock().unlock();
1214	>	}});
1215	>
1216	>	await(locked);
1217	>	lock.writeLock().lock();
1218	>	assertHasWaiters(lock, c, t1, t2);
1219	>	c.signalAll();
1220	>	assertHasNoWaiters(lock, c);
1221	>	lock.writeLock().unlock();
1222	>	awaitTermination(t1);
1223	>	awaitTermination(t2);
1224		}
1225
1226		/**
1227		* A serialized lock deserializes as unlocked
1228		*/
1229	<	public void testSerialization() {
1230	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1231	<	l.readLock().lock();
1232	<	l.readLock().unlock();
1229	>	public void testSerialization()      { testSerialization(false); }
1230	>	public void testSerialization_fair() { testSerialization(true); }
1231	>	public void testSerialization(boolean fair) {
1232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1233	>	lock.writeLock().lock();
1234	>	lock.readLock().lock();
1235
1236	<	try {
1237	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1238	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1239	<	out.writeObject(l);
1240	<	out.close();
1241	<
1242	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1243	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1244	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1245	<	r.readLock().lock();
1246	<	r.readLock().unlock();
1247	<	} catch(Exception e){
1248	<	e.printStackTrace();
1249	<	unexpectedException();
1250	<	}
1236	>	ReentrantReadWriteLock clone = serialClone(lock);
1237	>	assertEquals(lock.isFair(), clone.isFair());
1238	>	assertTrue(lock.isWriteLocked());
1239	>	assertFalse(clone.isWriteLocked());
1240	>	assertEquals(1, lock.getReadLockCount());
1241	>	assertEquals(0, clone.getReadLockCount());
1242	>	clone.writeLock().lock();
1243	>	clone.readLock().lock();
1244	>	assertTrue(clone.isWriteLocked());
1245	>	assertEquals(1, clone.getReadLockCount());
1246	>	clone.readLock().unlock();
1247	>	clone.writeLock().unlock();
1248	>	assertFalse(clone.isWriteLocked());
1249	>	assertEquals(1, lock.getReadLockCount());
1250	>	assertEquals(0, clone.getReadLockCount());
1251		}
1252
1253		/**
1254		* hasQueuedThreads reports whether there are waiting threads
1255		*/
1256	<	public void testhasQueuedThreads() {
1257	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1256	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1257	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1258	>	public void testHasQueuedThreads(boolean fair) {
1259	>	final PublicReentrantReadWriteLock lock =
1260	>	new PublicReentrantReadWriteLock(fair);
1261		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1262		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1263	<	try {
1264	<	assertFalse(lock.hasQueuedThreads());
1265	<	lock.writeLock().lock();
1266	<	t1.start();
1267	<	Thread.sleep(SHORT_DELAY_MS);
1268	<	assertTrue(lock.hasQueuedThreads());
1269	<	t2.start();
1270	<	Thread.sleep(SHORT_DELAY_MS);
1271	<	assertTrue(lock.hasQueuedThreads());
1272	<	t1.interrupt();
1273	<	Thread.sleep(SHORT_DELAY_MS);
1274	<	assertTrue(lock.hasQueuedThreads());
1275	<	lock.writeLock().unlock();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1277	<	assertFalse(lock.hasQueuedThreads());
1278	<	t1.join();
1248	<	t2.join();
1249	<	} catch(Exception e){
1250	<	unexpectedException();
1251	<	}
1252	<	}
1263	>	assertFalse(lock.hasQueuedThreads());
1264	>	lock.writeLock().lock();
1265	>	assertFalse(lock.hasQueuedThreads());
1266	>	t1.start();
1267	>	waitForQueuedThread(lock, t1);
1268	>	assertTrue(lock.hasQueuedThreads());
1269	>	t2.start();
1270	>	waitForQueuedThread(lock, t2);
1271	>	assertTrue(lock.hasQueuedThreads());
1272	>	t1.interrupt();
1273	>	awaitTermination(t1);
1274	>	assertTrue(lock.hasQueuedThreads());
1275	>	lock.writeLock().unlock();
1276	>	awaitTermination(t2);
1277	>	assertFalse(lock.hasQueuedThreads());
1278	>	}
1279
1280		/**
1281		* hasQueuedThread(null) throws NPE
1282		*/
1283	<	public void testHasQueuedThreadNPE() {
1284	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1283	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1284	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1285	>	public void testHasQueuedThreadNPE(boolean fair) {
1286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1287		try {
1288	<	sync.hasQueuedThread(null);
1288	>	lock.hasQueuedThread(null);
1289		shouldThrow();
1290	<	} catch (NullPointerException success) {
1263	<	}
1290	>	} catch (NullPointerException success) {}
1291		}
1292
1293		/**
1294	<	* hasQueuedThread reports whether a thread is queued.
1294	>	* hasQueuedThread reports whether a thread is queued
1295		*/
1296	<	public void testHasQueuedThread() {
1297	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1298	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1299	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1300	<	try {
1301	<	assertFalse(sync.hasQueuedThread(t1));
1302	<	assertFalse(sync.hasQueuedThread(t2));
1303	<	sync.writeLock().lock();
1304	<	t1.start();
1305	<	Thread.sleep(SHORT_DELAY_MS);
1306	<	assertTrue(sync.hasQueuedThread(t1));
1307	<	t2.start();
1308	<	Thread.sleep(SHORT_DELAY_MS);
1309	<	assertTrue(sync.hasQueuedThread(t1));
1310	<	assertTrue(sync.hasQueuedThread(t2));
1311	<	t1.interrupt();
1312	<	Thread.sleep(SHORT_DELAY_MS);
1313	<	assertFalse(sync.hasQueuedThread(t1));
1314	<	assertTrue(sync.hasQueuedThread(t2));
1315	<	sync.writeLock().unlock();
1316	<	Thread.sleep(SHORT_DELAY_MS);
1317	<	assertFalse(sync.hasQueuedThread(t1));
1318	<	Thread.sleep(SHORT_DELAY_MS);
1319	<	assertFalse(sync.hasQueuedThread(t2));
1320	<	t1.join();
1321	<	t2.join();
1322	<	} catch(Exception e){
1296	<	unexpectedException();
1297	<	}
1298	<	}
1299	<
1296	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1297	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1298	>	public void testHasQueuedThread(boolean fair) {
1299	>	final PublicReentrantReadWriteLock lock =
1300	>	new PublicReentrantReadWriteLock(fair);
1301	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1302	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1303	>	assertFalse(lock.hasQueuedThread(t1));
1304	>	assertFalse(lock.hasQueuedThread(t2));
1305	>	lock.writeLock().lock();
1306	>	t1.start();
1307	>	waitForQueuedThread(lock, t1);
1308	>	assertTrue(lock.hasQueuedThread(t1));
1309	>	assertFalse(lock.hasQueuedThread(t2));
1310	>	t2.start();
1311	>	waitForQueuedThread(lock, t2);
1312	>	assertTrue(lock.hasQueuedThread(t1));
1313	>	assertTrue(lock.hasQueuedThread(t2));
1314	>	t1.interrupt();
1315	>	awaitTermination(t1);
1316	>	assertFalse(lock.hasQueuedThread(t1));
1317	>	assertTrue(lock.hasQueuedThread(t2));
1318	>	lock.writeLock().unlock();
1319	>	awaitTermination(t2);
1320	>	assertFalse(lock.hasQueuedThread(t1));
1321	>	assertFalse(lock.hasQueuedThread(t2));
1322	>	}
1323
1324		/**
1325		* getQueueLength reports number of waiting threads
1326		*/
1327	<	public void testGetQueueLength() {
1328	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1327	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1328	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1329	>	public void testGetQueueLength(boolean fair) {
1330	>	final PublicReentrantReadWriteLock lock =
1331	>	new PublicReentrantReadWriteLock(fair);
1332		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1333		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1334	<	try {
1335	<	assertEquals(0, lock.getQueueLength());
1336	<	lock.writeLock().lock();
1337	<	t1.start();
1338	<	Thread.sleep(SHORT_DELAY_MS);
1339	<	assertEquals(1, lock.getQueueLength());
1340	<	t2.start();
1341	<	Thread.sleep(SHORT_DELAY_MS);
1342	<	assertEquals(2, lock.getQueueLength());
1343	<	t1.interrupt();
1344	<	Thread.sleep(SHORT_DELAY_MS);
1345	<	assertEquals(1, lock.getQueueLength());
1346	<	lock.writeLock().unlock();
1347	<	Thread.sleep(SHORT_DELAY_MS);
1348	<	assertEquals(0, lock.getQueueLength());
1323	<	t1.join();
1324	<	t2.join();
1325	<	} catch(Exception e){
1326	<	unexpectedException();
1327	<	}
1328	<	}
1334	>	assertEquals(0, lock.getQueueLength());
1335	>	lock.writeLock().lock();
1336	>	t1.start();
1337	>	waitForQueuedThread(lock, t1);
1338	>	assertEquals(1, lock.getQueueLength());
1339	>	t2.start();
1340	>	waitForQueuedThread(lock, t2);
1341	>	assertEquals(2, lock.getQueueLength());
1342	>	t1.interrupt();
1343	>	awaitTermination(t1);
1344	>	assertEquals(1, lock.getQueueLength());
1345	>	lock.writeLock().unlock();
1346	>	awaitTermination(t2);
1347	>	assertEquals(0, lock.getQueueLength());
1348	>	}
1349
1350		/**
1351		* getQueuedThreads includes waiting threads
1352		*/
1353	<	public void testGetQueuedThreads() {
1354	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1353	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1354	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1355	>	public void testGetQueuedThreads(boolean fair) {
1356	>	final PublicReentrantReadWriteLock lock =
1357	>	new PublicReentrantReadWriteLock(fair);
1358		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1359		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1360	<	try {
1361	<	assertTrue(lock.getQueuedThreads().isEmpty());
1362	<	lock.writeLock().lock();
1363	<	assertTrue(lock.getQueuedThreads().isEmpty());
1364	<	t1.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1366	<	assertTrue(lock.getQueuedThreads().contains(t1));
1367	<	t2.start();
1368	<	Thread.sleep(SHORT_DELAY_MS);
1369	<	assertTrue(lock.getQueuedThreads().contains(t1));
1370	<	assertTrue(lock.getQueuedThreads().contains(t2));
1371	<	t1.interrupt();
1372	<	Thread.sleep(SHORT_DELAY_MS);
1373	<	assertFalse(lock.getQueuedThreads().contains(t1));
1374	<	assertTrue(lock.getQueuedThreads().contains(t2));
1375	<	lock.writeLock().unlock();
1376	<	Thread.sleep(SHORT_DELAY_MS);
1377	<	assertTrue(lock.getQueuedThreads().isEmpty());
1378	<	t1.join();
1379	<	t2.join();
1380	<	} catch(Exception e){
1358	<	unexpectedException();
1359	<	}
1360	<	}
1360	>	assertTrue(lock.getQueuedThreads().isEmpty());
1361	>	lock.writeLock().lock();
1362	>	assertTrue(lock.getQueuedThreads().isEmpty());
1363	>	t1.start();
1364	>	waitForQueuedThread(lock, t1);
1365	>	assertEquals(1, lock.getQueuedThreads().size());
1366	>	assertTrue(lock.getQueuedThreads().contains(t1));
1367	>	t2.start();
1368	>	waitForQueuedThread(lock, t2);
1369	>	assertEquals(2, lock.getQueuedThreads().size());
1370	>	assertTrue(lock.getQueuedThreads().contains(t1));
1371	>	assertTrue(lock.getQueuedThreads().contains(t2));
1372	>	t1.interrupt();
1373	>	awaitTermination(t1);
1374	>	assertFalse(lock.getQueuedThreads().contains(t1));
1375	>	assertTrue(lock.getQueuedThreads().contains(t2));
1376	>	assertEquals(1, lock.getQueuedThreads().size());
1377	>	lock.writeLock().unlock();
1378	>	awaitTermination(t2);
1379	>	assertTrue(lock.getQueuedThreads().isEmpty());
1380	>	}
1381
1382		/**
1383		* hasWaiters throws NPE if null
1384		*/
1385	<	public void testHasWaitersNPE() {
1386	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1385	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1386	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1387	>	public void testHasWaitersNPE(boolean fair) {
1388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1389		try {
1390		lock.hasWaiters(null);
1391		shouldThrow();
1392	<	} catch (NullPointerException success) {
1371	<	} catch (Exception ex) {
1372	<	unexpectedException();
1373	<	}
1392	>	} catch (NullPointerException success) {}
1393		}
1394
1395		/**
1396		* getWaitQueueLength throws NPE if null
1397		*/
1398	<	public void testGetWaitQueueLengthNPE() {
1399	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1399	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1400	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1401	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1402		try {
1403		lock.getWaitQueueLength(null);
1404		shouldThrow();
1405	<	} catch (NullPointerException success) {
1385	<	} catch (Exception ex) {
1386	<	unexpectedException();
1387	<	}
1405	>	} catch (NullPointerException success) {}
1406		}
1407
1390	–
1408		/**
1409		* getWaitingThreads throws NPE if null
1410		*/
1411	<	public void testGetWaitingThreadsNPE() {
1412	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1411	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1412	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1413	>	public void testGetWaitingThreadsNPE(boolean fair) {
1414	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1415		try {
1416		lock.getWaitingThreads(null);
1417		shouldThrow();
1418	<	} catch (NullPointerException success) {
1400	<	} catch (Exception ex) {
1401	<	unexpectedException();
1402	<	}
1418	>	} catch (NullPointerException success) {}
1419		}
1420
1421		/**
1422	<	* hasWaiters throws IAE if not owned
1422	>	* hasWaiters throws IllegalArgumentException if not owned
1423		*/
1424	<	public void testHasWaitersIAE() {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1426	<	final Condition c = (lock.writeLock().newCondition());
1427	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1424	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1425	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1426	>	public void testHasWaitersIAE(boolean fair) {
1427	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1428	>	final Condition c = lock.writeLock().newCondition();
1429	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1430		try {
1431		lock2.hasWaiters(c);
1432		shouldThrow();
1433	<	} catch (IllegalArgumentException success) {
1416	<	} catch (Exception ex) {
1417	<	unexpectedException();
1418	<	}
1433	>	} catch (IllegalArgumentException success) {}
1434		}
1435
1436		/**
1437	<	* hasWaiters throws IMSE if not locked
1437	>	* hasWaiters throws IllegalMonitorStateException if not locked
1438		*/
1439	<	public void testHasWaitersIMSE() {
1440	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1441	<	final Condition c = (lock.writeLock().newCondition());
1439	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1440	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1441	>	public void testHasWaitersIMSE(boolean fair) {
1442	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1443	>	final Condition c = lock.writeLock().newCondition();
1444		try {
1445		lock.hasWaiters(c);
1446		shouldThrow();
1447	<	} catch (IllegalMonitorStateException success) {
1431	<	} catch (Exception ex) {
1432	<	unexpectedException();
1433	<	}
1447	>	} catch (IllegalMonitorStateException success) {}
1448		}
1449
1436	–
1450		/**
1451	<	* getWaitQueueLength throws IAE if not owned
1451	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1452		*/
1453	<	public void testGetWaitQueueLengthIAE() {
1454	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1455	<	final Condition c = (lock.writeLock().newCondition());
1456	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1453	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1454	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1455	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1456	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1457	>	final Condition c = lock.writeLock().newCondition();
1458	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1459		try {
1460		lock2.getWaitQueueLength(c);
1461		shouldThrow();
1462	<	} catch (IllegalArgumentException success) {
1448	<	} catch (Exception ex) {
1449	<	unexpectedException();
1450	<	}
1462	>	} catch (IllegalArgumentException success) {}
1463		}
1464
1465		/**
1466	<	* getWaitQueueLength throws IMSE if not locked
1466	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1467		*/
1468	<	public void testGetWaitQueueLengthIMSE() {
1469	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1470	<	final Condition c = (lock.writeLock().newCondition());
1468	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1469	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1470	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1471	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1472	>	final Condition c = lock.writeLock().newCondition();
1473		try {
1474		lock.getWaitQueueLength(c);
1475		shouldThrow();
1476	<	} catch (IllegalMonitorStateException success) {
1463	<	} catch (Exception ex) {
1464	<	unexpectedException();
1465	<	}
1476	>	} catch (IllegalMonitorStateException success) {}
1477		}
1478
1468	–
1479		/**
1480	<	* getWaitingThreads throws IAE if not owned
1480	>	* getWaitingThreads throws IllegalArgumentException if not owned
1481		*/
1482	<	public void testGetWaitingThreadsIAE() {
1483	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1484	<	final Condition c = (lock.writeLock().newCondition());
1485	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1482	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1483	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1484	>	public void testGetWaitingThreadsIAE(boolean fair) {
1485	>	final PublicReentrantReadWriteLock lock =
1486	>	new PublicReentrantReadWriteLock(fair);
1487	>	final Condition c = lock.writeLock().newCondition();
1488	>	final PublicReentrantReadWriteLock lock2 =
1489	>	new PublicReentrantReadWriteLock(fair);
1490		try {
1491		lock2.getWaitingThreads(c);
1492		shouldThrow();
1493	<	} catch (IllegalArgumentException success) {
1480	<	} catch (Exception ex) {
1481	<	unexpectedException();
1482	<	}
1493	>	} catch (IllegalArgumentException success) {}
1494		}
1495
1496		/**
1497	<	* getWaitingThreads throws IMSE if not locked
1497	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1498		*/
1499	<	public void testGetWaitingThreadsIMSE() {
1500	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1501	<	final Condition c = (lock.writeLock().newCondition());
1499	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1500	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1501	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1502	>	final PublicReentrantReadWriteLock lock =
1503	>	new PublicReentrantReadWriteLock(fair);
1504	>	final Condition c = lock.writeLock().newCondition();
1505		try {
1506		lock.getWaitingThreads(c);
1507		shouldThrow();
1508	<	} catch (IllegalMonitorStateException success) {
1495	<	} catch (Exception ex) {
1496	<	unexpectedException();
1497	<	}
1508	>	} catch (IllegalMonitorStateException success) {}
1509		}
1510
1500	–
1511		/**
1512		* hasWaiters returns true when a thread is waiting, else false
1513		*/
1514	<	public void testHasWaiters() {
1515	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1516	<	final Condition c = (lock.writeLock().newCondition());
1517	<	Thread t = new Thread(new Runnable() {
1518	<	public void run() {
1519	<	try {
1520	<	lock.writeLock().lock();
1521	<	threadAssertFalse(lock.hasWaiters(c));
1522	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1523	<	c.await();
1524	<	lock.writeLock().unlock();
1525	<	}
1526	<	catch(InterruptedException e) {
1527	<	threadUnexpectedException();
1528	<	}
1529	<	}
1530	<	});
1514	>	public void testHasWaiters()      { testHasWaiters(false); }
1515	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1516	>	public void testHasWaiters(boolean fair) {
1517	>	final PublicReentrantReadWriteLock lock =
1518	>	new PublicReentrantReadWriteLock(fair);
1519	>	final Condition c = lock.writeLock().newCondition();
1520	>	final CountDownLatch locked = new CountDownLatch(1);
1521	>	Thread t = newStartedThread(new CheckedRunnable() {
1522	>	public void realRun() throws InterruptedException {
1523	>	lock.writeLock().lock();
1524	>	assertHasNoWaiters(lock, c);
1525	>	assertFalse(lock.hasWaiters(c));
1526	>	locked.countDown();
1527	>	c.await();
1528	>	assertHasNoWaiters(lock, c);
1529	>	assertFalse(lock.hasWaiters(c));
1530	>	lock.writeLock().unlock();
1531	>	}});
1532
1533	<	try {
1534	<	t.start();
1535	<	Thread.sleep(SHORT_DELAY_MS);
1536	<	lock.writeLock().lock();
1537	<	assertTrue(lock.hasWaiters(c));
1538	<	assertEquals(1, lock.getWaitQueueLength(c));
1539	<	c.signal();
1540	<	lock.writeLock().unlock();
1541	<	Thread.sleep(SHORT_DELAY_MS);
1542	<	lock.writeLock().lock();
1532	<	assertFalse(lock.hasWaiters(c));
1533	<	assertEquals(0, lock.getWaitQueueLength(c));
1534	<	lock.writeLock().unlock();
1535	<	t.join(SHORT_DELAY_MS);
1536	<	assertFalse(t.isAlive());
1537	<	}
1538	<	catch (Exception ex) {
1539	<	unexpectedException();
1540	<	}
1533	>	await(locked);
1534	>	lock.writeLock().lock();
1535	>	assertHasWaiters(lock, c, t);
1536	>	assertTrue(lock.hasWaiters(c));
1537	>	c.signal();
1538	>	assertHasNoWaiters(lock, c);
1539	>	assertFalse(lock.hasWaiters(c));
1540	>	lock.writeLock().unlock();
1541	>	awaitTermination(t);
1542	>	assertHasNoWaiters(lock, c);
1543		}
1544
1545		/**
1546		* getWaitQueueLength returns number of waiting threads
1547		*/
1548	<	public void testGetWaitQueueLength() {
1549	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1550	<	final Condition c = (lock.writeLock().newCondition());
1551	<	Thread t = new Thread(new Runnable() {
1552	<	public void run() {
1553	<	try {
1554	<	lock.writeLock().lock();
1555	<	threadAssertFalse(lock.hasWaiters(c));
1556	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1557	<	c.await();
1558	<	lock.writeLock().unlock();
1559	<	}
1560	<	catch(InterruptedException e) {
1561	<	threadUnexpectedException();
1562	<	}
1561	<	}
1562	<	});
1548	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1549	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1550	>	public void testGetWaitQueueLength(boolean fair) {
1551	>	final PublicReentrantReadWriteLock lock =
1552	>	new PublicReentrantReadWriteLock(fair);
1553	>	final Condition c = lock.writeLock().newCondition();
1554	>	final CountDownLatch locked = new CountDownLatch(1);
1555	>	Thread t = newStartedThread(new CheckedRunnable() {
1556	>	public void realRun() throws InterruptedException {
1557	>	lock.writeLock().lock();
1558	>	assertEquals(0, lock.getWaitQueueLength(c));
1559	>	locked.countDown();
1560	>	c.await();
1561	>	lock.writeLock().unlock();
1562	>	}});
1563
1564	<	try {
1565	<	t.start();
1566	<	Thread.sleep(SHORT_DELAY_MS);
1567	<	lock.writeLock().lock();
1568	<	assertTrue(lock.hasWaiters(c));
1569	<	assertEquals(1, lock.getWaitQueueLength(c));
1570	<	c.signal();
1571	<	lock.writeLock().unlock();
1572	<	Thread.sleep(SHORT_DELAY_MS);
1573	<	lock.writeLock().lock();
1574	<	assertFalse(lock.hasWaiters(c));
1575	<	assertEquals(0, lock.getWaitQueueLength(c));
1576	<	lock.writeLock().unlock();
1577	<	t.join(SHORT_DELAY_MS);
1578	<	assertFalse(t.isAlive());
1579	<	}
1580	<	catch (Exception ex) {
1581	<	unexpectedException();
1582	<	}
1564	>	await(locked);
1565	>	lock.writeLock().lock();
1566	>	assertHasWaiters(lock, c, t);
1567	>	assertEquals(1, lock.getWaitQueueLength(c));
1568	>	c.signal();
1569	>	assertHasNoWaiters(lock, c);
1570	>	assertEquals(0, lock.getWaitQueueLength(c));
1571	>	lock.writeLock().unlock();
1572	>	awaitTermination(t);
1573		}
1574
1585	–
1575		/**
1576		* getWaitingThreads returns only and all waiting threads
1577		*/
1578	<	public void testGetWaitingThreads() {
1579	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1578	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1579	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1580	>	public void testGetWaitingThreads(boolean fair) {
1581	>	final PublicReentrantReadWriteLock lock =
1582	>	new PublicReentrantReadWriteLock(fair);
1583		final Condition c = lock.writeLock().newCondition();
1584	<	Thread t1 = new Thread(new Runnable() {
1585	<	public void run() {
1586	<	try {
1587	<	lock.writeLock().lock();
1588	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1589	<	c.await();
1590	<	lock.writeLock().unlock();
1591	<	}
1592	<	catch(InterruptedException e) {
1593	<	threadUnexpectedException();
1602	<	}
1603	<	}
1604	<	});
1605	<
1606	<	Thread t2 = new Thread(new Runnable() {
1607	<	public void run() {
1608	<	try {
1609	<	lock.writeLock().lock();
1610	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1611	<	c.await();
1612	<	lock.writeLock().unlock();
1613	<	}
1614	<	catch(InterruptedException e) {
1615	<	threadUnexpectedException();
1616	<	}
1617	<	}
1618	<	});
1584	>	final CountDownLatch locked1 = new CountDownLatch(1);
1585	>	final CountDownLatch locked2 = new CountDownLatch(1);
1586	>	Thread t1 = new Thread(new CheckedRunnable() {
1587	>	public void realRun() throws InterruptedException {
1588	>	lock.writeLock().lock();
1589	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1590	>	locked1.countDown();
1591	>	c.await();
1592	>	lock.writeLock().unlock();
1593	>	}});
1594
1595	<	try {
1596	<	lock.writeLock().lock();
1597	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1598	<	lock.writeLock().unlock();
1599	<	t1.start();
1600	<	Thread.sleep(SHORT_DELAY_MS);
1601	<	t2.start();
1602	<	Thread.sleep(SHORT_DELAY_MS);
1603	<	lock.writeLock().lock();
1604	<	assertTrue(lock.hasWaiters(c));
1605	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1606	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1607	<	c.signalAll();
1608	<	lock.writeLock().unlock();
1609	<	Thread.sleep(SHORT_DELAY_MS);
1610	<	lock.writeLock().lock();
1611	<	assertFalse(lock.hasWaiters(c));
1612	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1613	<	lock.writeLock().unlock();
1614	<	t1.join(SHORT_DELAY_MS);
1615	<	t2.join(SHORT_DELAY_MS);
1616	<	assertFalse(t1.isAlive());
1617	<	assertFalse(t2.isAlive());
1618	<	}
1619	<	catch (Exception ex) {
1620	<	unexpectedException();
1621	<	}
1595	>	Thread t2 = new Thread(new CheckedRunnable() {
1596	>	public void realRun() throws InterruptedException {
1597	>	lock.writeLock().lock();
1598	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1599	>	locked2.countDown();
1600	>	c.await();
1601	>	lock.writeLock().unlock();
1602	>	}});
1603	>
1604	>	lock.writeLock().lock();
1605	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1606	>	lock.writeLock().unlock();
1607	>
1608	>	t1.start();
1609	>	await(locked1);
1610	>	t2.start();
1611	>	await(locked2);
1612	>
1613	>	lock.writeLock().lock();
1614	>	assertTrue(lock.hasWaiters(c));
1615	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1616	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1617	>	assertEquals(2, lock.getWaitingThreads(c).size());
1618	>	c.signalAll();
1619	>	assertHasNoWaiters(lock, c);
1620	>	lock.writeLock().unlock();
1621	>
1622	>	awaitTermination(t1);
1623	>	awaitTermination(t2);
1624	>
1625	>	assertHasNoWaiters(lock, c);
1626		}
1627
1628		/**
1629		* toString indicates current lock state
1630		*/
1631	<	public void testToString() {
1632	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1633	<	String us = lock.toString();
1634	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1635	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1636	<	lock.writeLock().lock();
1637	<	String ws = lock.toString();
1638	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1639	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1631	>	public void testToString()      { testToString(false); }
1632	>	public void testToString_fair() { testToString(true); }
1633	>	public void testToString(boolean fair) {
1634	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1635	>	assertTrue(lock.toString().contains("Write locks = 0"));
1636	>	assertTrue(lock.toString().contains("Read locks = 0"));
1637	>	lock.writeLock().lock();
1638	>	assertTrue(lock.toString().contains("Write locks = 1"));
1639	>	assertTrue(lock.toString().contains("Read locks = 0"));
1640		lock.writeLock().unlock();
1641		lock.readLock().lock();
1642		lock.readLock().lock();
1643	<	String rs = lock.toString();
1644	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1666	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1643	>	assertTrue(lock.toString().contains("Write locks = 0"));
1644	>	assertTrue(lock.toString().contains("Read locks = 2"));
1645		}
1646
1647		/**
1648		* readLock.toString indicates current lock state
1649		*/
1650	<	public void testReadLockToString() {
1651	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1652	<	String us = lock.readLock().toString();
1653	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1650	>	public void testReadLockToString()      { testReadLockToString(false); }
1651	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1652	>	public void testReadLockToString(boolean fair) {
1653	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1654	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1655		lock.readLock().lock();
1656		lock.readLock().lock();
1657	<	String rs = lock.readLock().toString();
1679	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1657	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1658		}
1659
1660		/**
1661		* writeLock.toString indicates current lock state
1662		*/
1663	<	public void testWriteLockToString() {
1664	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1665	<	String us = lock.writeLock().toString();
1666	<	assertTrue(us.indexOf("Unlocked") >= 0);
1663	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1664	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1665	>	public void testWriteLockToString(boolean fair) {
1666	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1667	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1668		lock.writeLock().lock();
1669	<	String ls = lock.writeLock().toString();
1670	<	assertTrue(ls.indexOf("Locked") >= 0);
1669	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1670	>	lock.writeLock().unlock();
1671	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672		}
1673
1674		}

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