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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15	+	import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25	+	/**
26	+	* A runnable calling lockInterruptibly
27	+	*/
28	+	class InterruptibleLockRunnable extends CheckedRunnable {
29	+	final ReentrantReadWriteLock lock;
30	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	+	public void realRun() throws InterruptedException {
32	+	lock.writeLock().lockInterruptibly();
33	+	}
34	+	}
35
36	<	/*
37	<	* write-locking and read-locking an unlocked lock succeed
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39		*/
40	<	public void testLock() {
41	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
42	<	rl.writeLock().lock();
43	<	rl.writeLock().unlock();
44	<	rl.readLock().lock();
45	<	rl.readLock().unlock();
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	>	final ReentrantReadWriteLock lock;
42	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45	>	}
46		}
47
48	+	/**
49	+	* Subclass to expose protected methods
50	+	*/
51	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52	+	PublicReentrantReadWriteLock() { super(); }
53	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	+	public Thread getOwner() {
55	+	return super.getOwner();
56	+	}
57	+	public Collection<Thread> getQueuedThreads() {
58	+	return super.getQueuedThreads();
59	+	}
60	+	public Collection<Thread> getWaitingThreads(Condition c) {
61	+	return super.getWaitingThreads(c);
62	+	}
63	+	}
64
65	<	/*
66	<	* locking an unlocked fair lock succeeds
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67		*/
68	<	public void testFairLock() {
69	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
70	<	rl.writeLock().lock();
71	<	rl.writeLock().unlock();
72	<	rl.readLock().lock();
73	<	rl.readLock().unlock();
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedBy(lock, Thread.currentThread());
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<	public void testUnlock_IllegalMonitorStateException() {
80	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	<	try {
82	<	rl.writeLock().unlock();
83	<	shouldThrow();
84	<	} catch(IllegalMonitorStateException success){}
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new AssertionError("timed out");
84	>	Thread.yield();
85	>	}
86	>	assertTrue(t.isAlive());
87	>	assertTrue(lock.getOwner() != t);
88		}
89
90	+	/**
91	+	* Checks that lock is not write-locked.
92	+	*/
93	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	+	assertFalse(lock.isWriteLocked());
95	+	assertFalse(lock.isWriteLockedByCurrentThread());
96	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	+	assertNull(lock.getOwner());
98	+	assertEquals(0, lock.getWriteHoldCount());
99	+	}
100
101		/**
102	<	* write-lockInterruptibly is interruptible
102	>	* Checks that lock is write-locked by the given thread.
103		*/
104	<	public void testWriteLockInterruptibly_Interrupted() {
105	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
106	<	lock.writeLock().lock();
107	<	Thread t = new Thread(new Runnable() {
108	<	public void run() {
109	<	try {
110	<	lock.writeLock().lockInterruptibly();
111	<	threadShouldThrow();
112	<	} catch(InterruptedException success){}
113	<	}
70	<	});
71	<	try {
72	<	t.start();
73	<	t.interrupt();
74	<	lock.writeLock().unlock();
75	<	t.join();
76	<	} catch(Exception e){
77	<	unexpectedException();
78	<	}
79	<	}
80	<
81	<	/**
82	<	* timed write-trylock is interruptible
83	<	*/
84	<	public void testWriteTryLock_Interrupted() {
85	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
86	<	lock.writeLock().lock();
87	<	Thread t = new Thread(new Runnable() {
88	<	public void run() {
89	<	try {
90	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
91	<	threadShouldThrow();
92	<	} catch(InterruptedException success){}
93	<	}
94	<	});
95	<	try {
96	<	t.start();
97	<	t.interrupt();
98	<	lock.writeLock().unlock();
99	<	t.join();
100	<	} catch(Exception e){
101	<	unexpectedException();
102	<	}
104	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
105	>	assertTrue(lock.isWriteLocked());
106	>	assertSame(t, lock.getOwner());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.isWriteLockedByCurrentThread());
109	>	assertEquals(t == Thread.currentThread(),
110	>	lock.writeLock().isHeldByCurrentThread());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.getWriteHoldCount() > 0);
113	>	assertEquals(0, lock.getReadLockCount());
114		}
115
116		/**
117	<	* read-lockInterruptibly is interruptible
117	>	* Checks that condition c has no waiters.
118		*/
119	<	public void testReadLockInterruptibly_Interrupted() {
120	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
110	<	lock.writeLock().lock();
111	<	Thread t = new Thread(new Runnable() {
112	<	public void run() {
113	<	try {
114	<	lock.readLock().lockInterruptibly();
115	<	threadShouldThrow();
116	<	} catch(InterruptedException success){}
117	<	}
118	<	});
119	<	try {
120	<	t.start();
121	<	t.interrupt();
122	<	lock.writeLock().unlock();
123	<	t.join();
124	<	} catch(Exception e){
125	<	unexpectedException();
126	<	}
127	<	}
128	<
129	<	/**
130	<	* timed read-trylock is interruptible
131	<	*/
132	<	public void testReadTryLock_Interrupted() {
133	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
134	<	lock.writeLock().lock();
135	<	Thread t = new Thread(new Runnable() {
136	<	public void run() {
137	<	try {
138	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
139	<	threadShouldThrow();
140	<	} catch(InterruptedException success){}
141	<	}
142	<	});
143	<	try {
144	<	t.start();
145	<	t.interrupt();
146	<	t.join();
147	<	} catch(Exception e){
148	<	unexpectedException();
149	<	}
119	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	>	assertHasWaiters(lock, c, new Thread[] {});
121		}
122
123	<
124	<	/**
125	<	* write-trylock fails if locked
126	<	*/
127	<	public void testWriteTryLockWhenLocked() {
128	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
129	<	lock.writeLock().lock();
130	<	Thread t = new Thread(new Runnable() {
131	<	public void run() {
132	<	threadAssertFalse(lock.writeLock().tryLock());
133	<	}
134	<	});
135	<	try {
136	<	t.start();
137	<	t.join();
123	>	/**
124	>	* Checks that condition c has exactly the given waiter threads.
125	>	*/
126	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
127	>	Thread... threads) {
128	>	lock.writeLock().lock();
129	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
130	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
131	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
132	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
133	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
134	>	new HashSet<Thread>(Arrays.asList(threads)));
135	>	lock.writeLock().unlock();
136	>	}
137	>
138	>	/**
139	>	* Constructor sets given fairness, and is in unlocked state
140	>	*/
141	>	public void testConstructor() {
142	>	PublicReentrantReadWriteLock lock;
143	>
144	>	lock = new PublicReentrantReadWriteLock();
145	>	assertFalse(lock.isFair());
146	>	assertNotWriteLocked(lock);
147	>	assertEquals(0, lock.getReadLockCount());
148	>
149	>	lock = new PublicReentrantReadWriteLock(true);
150	>	assertTrue(lock.isFair());
151	>	assertNotWriteLocked(lock);
152	>	assertEquals(0, lock.getReadLockCount());
153	>
154	>	lock = new PublicReentrantReadWriteLock(false);
155	>	assertFalse(lock.isFair());
156	>	assertNotWriteLocked(lock);
157	>	assertEquals(0, lock.getReadLockCount());
158	>	}
159	>
160	>	/**
161	>	* write-locking and read-locking an unlocked lock succeed
162	>	*/
163	>	public void testLock() {
164	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
165	>	assertNotWriteLocked(lock);
166	>	lock.writeLock().lock();
167	>	assertWriteLockedBy(lock, Thread.currentThread());
168	>	lock.writeLock().unlock();
169	>	assertNotWriteLocked(lock);
170	>	assertEquals(0, lock.getReadLockCount());
171	>	lock.readLock().lock();
172	>	assertNotWriteLocked(lock);
173	>	assertEquals(1, lock.getReadLockCount());
174	>	lock.readLock().unlock();
175	>	assertNotWriteLocked(lock);
176	>	assertEquals(0, lock.getReadLockCount());
177	>	}
178	>
179	>	/**
180	>	* locking an unlocked fair lock succeeds
181	>	*/
182	>	public void testFairLock() {
183	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
184	>	assertNotWriteLocked(lock);
185	>	lock.writeLock().lock();
186	>	assertWriteLockedBy(lock, Thread.currentThread());
187	>	lock.writeLock().unlock();
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>	lock.readLock().lock();
191	>	assertNotWriteLocked(lock);
192	>	assertEquals(1, lock.getReadLockCount());
193	>	lock.readLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196	>	}
197	>
198	>	/**
199	>	* getWriteHoldCount returns number of recursive holds
200	>	*/
201	>	public void testGetWriteHoldCount() {
202	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	>	for (int i = 1; i <= SIZE; i++) {
204	>	lock.writeLock().lock();
205	>	assertEquals(i,lock.getWriteHoldCount());
206	>	}
207	>	for (int i = SIZE; i > 0; i--) {
208		lock.writeLock().unlock();
209	<	} catch(Exception e){
169	<	unexpectedException();
209	>	assertEquals(i-1,lock.getWriteHoldCount());
210		}
211	<	}
211	>	}
212
213		/**
214	<	* read-trylock fails if locked
214	>	* WriteLock.getHoldCount returns number of recursive holds
215		*/
216	<	public void testReadTryLockWhenLocked() {
217	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	<	lock.writeLock().lock();
219	<	Thread t = new Thread(new Runnable() {
220	<	public void run() {
221	<	threadAssertFalse(lock.readLock().tryLock());
222	<	}
183	<	});
184	<	try {
185	<	t.start();
186	<	t.join();
216	>	public void testGetHoldCount() {
217	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	>	for (int i = 1; i <= SIZE; i++) {
219	>	lock.writeLock().lock();
220	>	assertEquals(i,lock.writeLock().getHoldCount());
221	>	}
222	>	for (int i = SIZE; i > 0; i--) {
223		lock.writeLock().unlock();
224	<	} catch(Exception e){
189	<	unexpectedException();
224	>	assertEquals(i-1,lock.writeLock().getHoldCount());
225		}
226	<	}
226	>	}
227
228		/**
229	<	* Multiple threads can hold a read lock when not write-locked
229	>	* getReadHoldCount returns number of recursive holds
230		*/
231	<	public void testMultipleReadLocks() {
232	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	<	lock.readLock().lock();
234	<	Thread t = new Thread(new Runnable() {
235	<	public void run() {
236	<	threadAssertTrue(lock.readLock().tryLock());
237	<	lock.readLock().unlock();
203	<	}
204	<	});
205	<	try {
206	<	t.start();
207	<	t.join();
231	>	public void testGetReadHoldCount() {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.readLock().lock();
235	>	assertEquals(i,lock.getReadHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238		lock.readLock().unlock();
239	<	} catch(Exception e){
210	<	unexpectedException();
239	>	assertEquals(i-1,lock.getReadHoldCount());
240		}
241	<	}
241	>	}
242
243		/**
244	<	* A writelock succeeds after reading threads unlock
244	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testWriteAfterMultipleReadLocks() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	<	lock.readLock().lock();
220	<	Thread t1 = new Thread(new Runnable() {
221	<	public void run() {
222	<	lock.readLock().lock();
223	<	lock.readLock().unlock();
224	<	}
225	<	});
226	<	Thread t2 = new Thread(new Runnable() {
227	<	public void run() {
228	<	lock.writeLock().lock();
229	<	lock.writeLock().unlock();
230	<	}
231	<	});
232	<
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248		try {
234	–	t1.start();
235	–	t2.start();
236	–	Thread.sleep(SHORT_DELAY_MS);
237	–	lock.readLock().unlock();
238	–	t1.join(MEDIUM_DELAY_MS);
239	–	t2.join(MEDIUM_DELAY_MS);
240	–	assertTrue(!t1.isAlive());
241	–	assertTrue(!t2.isAlive());
242	–
243	–	} catch(Exception e){
244	–	unexpectedException();
245	–	}
246	–	}
247	–
248	–	/**
249	–	* Readlocks succeed after a writing thread unlocks
250	–	*/
251	–	public void testReadAfterWriteLock() {
252	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	–	lock.writeLock().lock();
254	–	Thread t1 = new Thread(new Runnable() {
255	–	public void run() {
256	–	lock.readLock().lock();
257	–	lock.readLock().unlock();
258	–	}
259	–	});
260	–	Thread t2 = new Thread(new Runnable() {
261	–	public void run() {
262	–	lock.readLock().lock();
263	–	lock.readLock().unlock();
264	–	}
265	–	});
266	–
267	–	try {
268	–	t1.start();
269	–	t2.start();
270	–	Thread.sleep(SHORT_DELAY_MS);
249		lock.writeLock().unlock();
250	<	t1.join(MEDIUM_DELAY_MS);
251	<	t2.join(MEDIUM_DELAY_MS);
252	<	assertTrue(!t1.isAlive());
275	<	assertTrue(!t2.isAlive());
276	<
277	<	} catch(Exception e){
278	<	unexpectedException();
279	<	}
280	<	}
281	<
250	>	shouldThrow();
251	>	} catch (IllegalMonitorStateException success) {}
252	>	}
253
254		/**
255	<	* Read trylock succeeds if readlocked but not writelocked
256	<	*/
257	<	public void testTryLockWhenReadLocked() {
258	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.readLock().lock();
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run() {
291	<	threadAssertTrue(lock.readLock().tryLock());
292	<	lock.readLock().unlock();
293	<	}
294	<	});
255	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
256	>	*/
257	>	public void testReadUnlock_IllegalMonitorStateException() {
258	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259		try {
296	–	t.start();
297	–	t.join();
260		lock.readLock().unlock();
261	<	} catch(Exception e){
262	<	unexpectedException();
263	<	}
302	<	}
261	>	shouldThrow();
262	>	} catch (IllegalMonitorStateException success) {}
263	>	}
264
265	<
265	>	/**
266	>	* write-lockInterruptibly is interruptible
267	>	*/
268	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
269	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
270	>	lock.writeLock().lock();
271	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	lock.writeLock().lockInterruptibly();
274	>	}});
275	>
276	>	waitForQueuedThread(lock, t);
277	>	t.interrupt();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280	>	}
281
282		/**
283	<	* write trylock fails when readlocked
283	>	* timed write-tryLock is interruptible
284	>	*/
285	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
286	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
287	>	lock.writeLock().lock();
288	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
289	>	public void realRun() throws InterruptedException {
290	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
291	>	}});
292	>
293	>	waitForQueuedThread(lock, t);
294	>	t.interrupt();
295	>	awaitTermination(t);
296	>	releaseWriteLock(lock);
297	>	}
298	>
299	>	/**
300	>	* read-lockInterruptibly is interruptible
301		*/
302	<	public void testWriteTryLockWhenReadLocked() {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	<	lock.readLock().lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	threadAssertFalse(lock.writeLock().tryLock());
308	<	}
316	<	});
317	<	try {
318	<	t.start();
319	<	t.join();
320	<	lock.readLock().unlock();
321	<	} catch(Exception e){
322	<	unexpectedException();
323	<	}
324	<	}
302	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
303	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
304	>	lock.writeLock().lock();
305	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
306	>	public void realRun() throws InterruptedException {
307	>	lock.readLock().lockInterruptibly();
308	>	}});
309
310	<
310	>	waitForQueuedThread(lock, t);
311	>	t.interrupt();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314	>	}
315
316		/**
317	<	* write timed trylock times out if locked
318	<	*/
319	<	public void testWriteTryLock_Timeout() {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
321	<	lock.writeLock().lock();
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	try {
325	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
326	<	} catch (Exception ex) {
327	<	threadUnexpectedException();
328	<	}
329	<	}
330	<	});
331	<	try {
344	<	t.start();
345	<	t.join();
346	<	lock.writeLock().unlock();
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
317	>	* timed read-tryLock is interruptible
318	>	*/
319	>	public void testReadTryLock_Interrupted() throws InterruptedException {
320	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
321	>	lock.writeLock().lock();
322	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
323	>	public void realRun() throws InterruptedException {
324	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
325	>	}});
326	>
327	>	waitForQueuedThread(lock, t);
328	>	t.interrupt();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331	>	}
332
333		/**
334	<	* read timed trylock times out if write-locked
334	>	* write-tryLock fails if locked
335		*/
336	<	public void testReadTryLock_Timeout() {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
338	<	lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	try {
342	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
362	<	} catch (Exception ex) {
363	<	threadUnexpectedException();
364	<	}
365	<	}
366	<	});
367	<	try {
368	<	t.start();
369	<	t.join();
370	<	lock.writeLock().unlock();
371	<	} catch(Exception e){
372	<	unexpectedException();
373	<	}
374	<	}
336	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
337	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
338	>	lock.writeLock().lock();
339	>	Thread t = newStartedThread(new CheckedRunnable() {
340	>	public void realRun() {
341	>	assertFalse(lock.writeLock().tryLock());
342	>	}});
343
344	+	awaitTermination(t);
345	+	releaseWriteLock(lock);
346	+	}
347
348		/**
349	<	* write lockInterruptibly succeeds if lock free else is interruptible
349	>	* read-tryLock fails if locked
350		*/
351	<	public void testWriteLockInterruptibly() {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
353	<	try {
354	<	lock.writeLock().lockInterruptibly();
355	<	} catch(Exception e) {
356	<	unexpectedException();
357	<	}
358	<	Thread t = new Thread(new Runnable() {
359	<	public void run() {
360	<	try {
390	<	lock.writeLock().lockInterruptibly();
391	<	threadShouldThrow();
392	<	}
393	<	catch(InterruptedException success) {
394	<	}
395	<	}
396	<	});
397	<	try {
398	<	t.start();
399	<	t.interrupt();
400	<	t.join();
401	<	lock.writeLock().unlock();
402	<	} catch(Exception e){
403	<	unexpectedException();
404	<	}
351	>	public void testReadTryLockWhenLocked() throws InterruptedException {
352	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
353	>	lock.writeLock().lock();
354	>	Thread t = newStartedThread(new CheckedRunnable() {
355	>	public void realRun() {
356	>	assertFalse(lock.readLock().tryLock());
357	>	}});
358	>
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361		}
362
363		/**
364	<	*  read lockInterruptibly succeeds if lock free else is interruptible
364	>	* Multiple threads can hold a read lock when not write-locked
365		*/
366	<	public void testReadLockInterruptibly() {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	try {
369	<	lock.writeLock().lockInterruptibly();
370	<	} catch(Exception e) {
371	<	unexpectedException();
372	<	}
373	<	Thread t = new Thread(new Runnable() {
374	<	public void run() {
375	<	try {
376	<	lock.readLock().lockInterruptibly();
377	<	threadShouldThrow();
378	<	}
379	<	catch(InterruptedException success) {
380	<	}
381	<	}
382	<	});
383	<	try {
384	<	t.start();
385	<	t.interrupt();
386	<	t.join();
387	<	lock.writeLock().unlock();
388	<	} catch(Exception e){
389	<	unexpectedException();
390	<	}
366	>	public void testMultipleReadLocks() throws InterruptedException {
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	assertTrue(lock.readLock().tryLock());
372	>	lock.readLock().unlock();
373	>	}});
374	>
375	>	awaitTermination(t);
376	>	lock.readLock().unlock();
377	>	}
378	>
379	>	/**
380	>	* A writelock succeeds only after a reading thread unlocks
381	>	*/
382	>	public void testWriteAfterReadLock() throws InterruptedException {
383	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
384	>	lock.readLock().lock();
385	>
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387	>	public void realRun() {
388	>	assertEquals(1, lock.getReadLockCount());
389	>	lock.writeLock().lock();
390	>	assertEquals(0, lock.getReadLockCount());
391	>	lock.writeLock().unlock();
392	>	}});
393	>	waitForQueuedThread(lock, t);
394	>	assertNotWriteLocked(lock);
395	>	assertEquals(1, lock.getReadLockCount());
396	>	lock.readLock().unlock();
397	>	assertEquals(0, lock.getReadLockCount());
398	>	awaitTermination(t);
399	>	assertNotWriteLocked(lock);
400	>	}
401	>
402	>	/**
403	>	* A writelock succeeds only after reading threads unlock
404	>	*/
405	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
406	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
407	>	lock.readLock().lock();
408	>	lock.readLock().lock();
409	>	Thread t1 = newStartedThread(new CheckedRunnable() {
410	>	public void realRun() {
411	>	lock.readLock().lock();
412	>	assertEquals(3, lock.getReadLockCount());
413	>	lock.readLock().unlock();
414	>	}});
415	>	awaitTermination(t1);
416	>
417	>	Thread t2 = newStartedThread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	assertEquals(2, lock.getReadLockCount());
420	>	lock.writeLock().lock();
421	>	assertEquals(0, lock.getReadLockCount());
422	>	lock.writeLock().unlock();
423	>	}});
424	>	waitForQueuedThread(lock, t2);
425	>	assertNotWriteLocked(lock);
426	>	assertEquals(2, lock.getReadLockCount());
427	>	lock.readLock().unlock();
428	>	lock.readLock().unlock();
429	>	assertEquals(0, lock.getReadLockCount());
430	>	awaitTermination(t2);
431	>	assertNotWriteLocked(lock);
432	>	}
433	>
434	>	/**
435	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
436	>	* will block if there is a waiting writer thread.
437	>	*/
438	>	public void testReaderWriterReaderFairFifo() throws InterruptedException {
439	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
440	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
441	>
442	>	lock.readLock().lock();
443	>	Thread t1 = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() {
445	>	assertEquals(1, lock.getReadLockCount());
446	>	lock.writeLock().lock();
447	>	assertEquals(0, lock.getReadLockCount());
448	>	t1GotLock.set(true);
449	>	lock.writeLock().unlock();
450	>	}});
451	>	waitForQueuedThread(lock, t1);
452	>
453	>	Thread t2 = newStartedThread(new CheckedRunnable() {
454	>	public void realRun() {
455	>	assertEquals(1, lock.getReadLockCount());
456	>	lock.readLock().lock();
457	>	assertEquals(1, lock.getReadLockCount());
458	>	assertTrue(t1GotLock.get());
459	>	lock.readLock().unlock();
460	>	}});
461	>	waitForQueuedThread(lock, t2);
462	>	assertTrue(t1.isAlive());
463	>	assertNotWriteLocked(lock);
464	>	assertEquals(1, lock.getReadLockCount());
465	>	lock.readLock().unlock();
466	>	awaitTermination(t1);
467	>	awaitTermination(t2);
468	>	assertNotWriteLocked(lock);
469	>	}
470	>
471	>	/**
472	>	* Readlocks succeed only after a writing thread unlocks
473	>	*/
474	>	public void testReadAfterWriteLock() throws InterruptedException {
475	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
476	>	lock.writeLock().lock();
477	>	Thread t1 = newStartedThread(new CheckedRunnable() {
478	>	public void realRun() {
479	>	lock.readLock().lock();
480	>	lock.readLock().unlock();
481	>	}});
482	>	Thread t2 = newStartedThread(new CheckedRunnable() {
483	>	public void realRun() {
484	>	lock.readLock().lock();
485	>	lock.readLock().unlock();
486	>	}});
487	>
488	>	waitForQueuedThread(lock, t1);
489	>	waitForQueuedThread(lock, t2);
490	>	releaseWriteLock(lock);
491	>	awaitTermination(t1);
492	>	awaitTermination(t2);
493	>	}
494	>
495	>	/**
496	>	* Read trylock succeeds if write locked by current thread
497	>	*/
498	>	public void testReadHoldingWriteLock() {
499	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
500	>	lock.writeLock().lock();
501	>	assertTrue(lock.readLock().tryLock());
502	>	lock.readLock().unlock();
503	>	lock.writeLock().unlock();
504	>	}
505	>
506	>	/**
507	>	* Read lock succeeds if write locked by current thread even if
508	>	* other threads are waiting for readlock
509	>	*/
510	>	public void testReadHoldingWriteLock2() throws InterruptedException {
511	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
512	>	lock.writeLock().lock();
513	>	lock.readLock().lock();
514	>	lock.readLock().unlock();
515	>
516	>	Thread t1 = newStartedThread(new CheckedRunnable() {
517	>	public void realRun() {
518	>	lock.readLock().lock();
519	>	lock.readLock().unlock();
520	>	}});
521	>	Thread t2 = newStartedThread(new CheckedRunnable() {
522	>	public void realRun() {
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	}});
526	>
527	>	waitForQueuedThread(lock, t1);
528	>	waitForQueuedThread(lock, t2);
529	>	assertWriteLockedBy(lock, Thread.currentThread());
530	>	lock.readLock().lock();
531	>	lock.readLock().unlock();
532	>	releaseWriteLock(lock);
533	>	awaitTermination(t1);
534	>	awaitTermination(t2);
535	>	}
536	>
537	>	/**
538	>	* Read lock succeeds if write locked by current thread even if
539	>	* other threads are waiting for writelock
540	>	*/
541	>	public void testReadHoldingWriteLock3() throws InterruptedException {
542	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543	>	lock.writeLock().lock();
544	>	lock.readLock().lock();
545	>	lock.readLock().unlock();
546	>
547	>	Thread t1 = newStartedThread(new CheckedRunnable() {
548	>	public void realRun() {
549	>	lock.writeLock().lock();
550	>	lock.writeLock().unlock();
551	>	}});
552	>	Thread t2 = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() {
554	>	lock.writeLock().lock();
555	>	lock.writeLock().unlock();
556	>	}});
557	>
558	>	waitForQueuedThread(lock, t1);
559	>	waitForQueuedThread(lock, t2);
560	>	assertWriteLockedBy(lock, Thread.currentThread());
561	>	lock.readLock().lock();
562	>	lock.readLock().unlock();
563	>	releaseWriteLock(lock);
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566	>	}
567	>
568	>	/**
569	>	* Write lock succeeds if write locked by current thread even if
570	>	* other threads are waiting for writelock
571	>	*/
572	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
573	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574	>	lock.writeLock().lock();
575	>	lock.writeLock().lock();
576	>	lock.writeLock().unlock();
577	>
578	>	Thread t1 = newStartedThread(new CheckedRunnable() {
579	>	public void realRun() {
580	>	lock.writeLock().lock();
581	>	lock.writeLock().unlock();
582	>	}});
583	>	Thread t2 = newStartedThread(new CheckedRunnable() {
584	>	public void realRun() {
585	>	lock.writeLock().lock();
586	>	lock.writeLock().unlock();
587	>	}});
588	>
589	>	waitForQueuedThread(lock, t1);
590	>	waitForQueuedThread(lock, t2);
591	>	assertWriteLockedBy(lock, Thread.currentThread());
592	>	assertEquals(1, lock.getWriteHoldCount());
593	>	lock.writeLock().lock();
594	>	assertWriteLockedBy(lock, Thread.currentThread());
595	>	assertEquals(2, lock.getWriteHoldCount());
596	>	lock.writeLock().unlock();
597	>	releaseWriteLock(lock);
598	>	awaitTermination(t1);
599	>	awaitTermination(t2);
600	>	}
601	>
602	>	/**
603	>	* Fair Read trylock succeeds if write locked by current thread
604	>	*/
605	>	public void testReadHoldingWriteLockFair() {
606	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	>	lock.writeLock().lock();
608	>	assertTrue(lock.readLock().tryLock());
609	>	lock.readLock().unlock();
610	>	lock.writeLock().unlock();
611	>	}
612	>
613	>	/**
614	>	* Fair Read lock succeeds if write locked by current thread even if
615	>	* other threads are waiting for readlock
616	>	*/
617	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
618	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
619	>	lock.writeLock().lock();
620	>	lock.readLock().lock();
621	>	lock.readLock().unlock();
622	>
623	>	Thread t1 = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	lock.readLock().lock();
626	>	lock.readLock().unlock();
627	>	}});
628	>	Thread t2 = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	lock.readLock().lock();
631	>	lock.readLock().unlock();
632	>	}});
633	>
634	>	waitForQueuedThread(lock, t1);
635	>	waitForQueuedThread(lock, t2);
636	>	assertWriteLockedBy(lock, Thread.currentThread());
637	>	lock.readLock().lock();
638	>	lock.readLock().unlock();
639	>	releaseWriteLock(lock);
640	>	awaitTermination(t1);
641	>	awaitTermination(t2);
642	>	}
643	>
644	>	/**
645	>	* Fair Read lock succeeds if write locked by current thread even if
646	>	* other threads are waiting for writelock
647	>	*/
648	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
649	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
650	>	lock.writeLock().lock();
651	>	lock.readLock().lock();
652	>	lock.readLock().unlock();
653	>
654	>	Thread t1 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.writeLock().lock();
657	>	lock.writeLock().unlock();
658	>	}});
659	>	Thread t2 = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	lock.writeLock().lock();
662	>	lock.writeLock().unlock();
663	>	}});
664	>
665	>	waitForQueuedThread(lock, t1);
666	>	waitForQueuedThread(lock, t2);
667	>	assertWriteLockedBy(lock, Thread.currentThread());
668	>	lock.readLock().lock();
669	>	lock.readLock().unlock();
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673	>	}
674	>
675	>	/**
676	>	* Fair Write lock succeeds if write locked by current thread even if
677	>	* other threads are waiting for writelock
678	>	*/
679	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
680	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
681	>	lock.writeLock().lock();
682	>	Thread t1 = newStartedThread(new CheckedRunnable() {
683	>	public void realRun() {
684	>	lock.writeLock().lock();
685	>	lock.writeLock().unlock();
686	>	}});
687	>	Thread t2 = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() {
689	>	lock.writeLock().lock();
690	>	lock.writeLock().unlock();
691	>	}});
692	>
693	>	waitForQueuedThread(lock, t1);
694	>	waitForQueuedThread(lock, t2);
695	>	assertWriteLockedBy(lock, Thread.currentThread());
696	>	assertEquals(1, lock.getWriteHoldCount());
697	>	lock.writeLock().lock();
698	>	assertEquals(2, lock.getWriteHoldCount());
699	>	lock.writeLock().unlock();
700	>	lock.writeLock().lock();
701	>	lock.writeLock().unlock();
702	>	releaseWriteLock(lock);
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705	>	}
706	>
707	>	/**
708	>	* Read tryLock succeeds if readlocked but not writelocked
709	>	*/
710	>	public void testTryLockWhenReadLocked() throws InterruptedException {
711	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	>	lock.readLock().lock();
713	>	Thread t = newStartedThread(new CheckedRunnable() {
714	>	public void realRun() {
715	>	assertTrue(lock.readLock().tryLock());
716	>	lock.readLock().unlock();
717	>	}});
718	>
719	>	awaitTermination(t);
720	>	lock.readLock().unlock();
721	>	}
722	>
723	>	/**
724	>	* write tryLock fails when readlocked
725	>	*/
726	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
727	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	>	lock.readLock().lock();
729	>	Thread t = newStartedThread(new CheckedRunnable() {
730	>	public void realRun() {
731	>	assertFalse(lock.writeLock().tryLock());
732	>	}});
733	>
734	>	awaitTermination(t);
735	>	lock.readLock().unlock();
736	>	}
737	>
738	>	/**
739	>	* Fair Read tryLock succeeds if readlocked but not writelocked
740	>	*/
741	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	>	lock.readLock().lock();
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749	>
750	>	awaitTermination(t);
751	>	lock.readLock().unlock();
752	>	}
753	>
754	>	/**
755	>	* Fair write tryLock fails when readlocked
756	>	*/
757	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759	>	lock.readLock().lock();
760	>	Thread t = newStartedThread(new CheckedRunnable() {
761	>	public void realRun() {
762	>	assertFalse(lock.writeLock().tryLock());
763	>	}});
764	>
765	>	awaitTermination(t);
766	>	lock.readLock().unlock();
767	>	}
768	>
769	>	/**
770	>	* write timed tryLock times out if locked
771	>	*/
772	>	public void testWriteTryLock_Timeout() throws InterruptedException {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	>	lock.writeLock().lock();
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776	>	public void realRun() throws InterruptedException {
777	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
778	>	}});
779	>
780	>	awaitTermination(t);
781	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
782	>	lock.writeLock().unlock();
783	>	}
784	>
785	>	/**
786	>	* read timed tryLock times out if write-locked
787	>	*/
788	>	public void testReadTryLock_Timeout() throws InterruptedException {
789	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	>	lock.writeLock().lock();
791	>	Thread t = newStartedThread(new CheckedRunnable() {
792	>	public void realRun() throws InterruptedException {
793	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
794	>	}});
795	>
796	>	awaitTermination(t);
797	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
798	>	lock.writeLock().unlock();
799	>	}
800	>
801	>	/**
802	>	* write lockInterruptibly succeeds if lock free else is interruptible
803	>	*/
804	>	public void testWriteLockInterruptibly() throws InterruptedException {
805	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
806	>	lock.writeLock().lockInterruptibly();
807	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
808	>	public void realRun() throws InterruptedException {
809	>	lock.writeLock().lockInterruptibly();
810	>	}});
811	>
812	>	waitForQueuedThread(lock, t);
813	>	t.interrupt();
814	>	awaitTermination(t);
815	>	releaseWriteLock(lock);
816	>	}
817	>
818	>	/**
819	>	* read lockInterruptibly succeeds if lock free else is interruptible
820	>	*/
821	>	public void testReadLockInterruptibly() throws InterruptedException {
822	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
823	>	lock.writeLock().lockInterruptibly();
824	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	lock.readLock().lockInterruptibly();
827	>	}});
828	>
829	>	waitForQueuedThread(lock, t);
830	>	t.interrupt();
831	>	awaitTermination(t);
832	>	releaseWriteLock(lock);
833		}
834
835		/**
836		* Calling await without holding lock throws IllegalMonitorStateException
837		*/
838	<	public void testAwait_IllegalMonitor() {
839	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
838	>	public void testAwait_IllegalMonitor() throws InterruptedException {
839	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840		final Condition c = lock.writeLock().newCondition();
841		try {
842		c.await();
843		shouldThrow();
844	<	}
845	<	catch (IllegalMonitorStateException success) {
846	<	}
449	<	catch (Exception ex) {
844	>	} catch (IllegalMonitorStateException success) {}
845	>	try {
846	>	c.await(LONG_DELAY_MS, MILLISECONDS);
847		shouldThrow();
848	<	}
848	>	} catch (IllegalMonitorStateException success) {}
849	>	try {
850	>	c.awaitNanos(100);
851	>	shouldThrow();
852	>	} catch (IllegalMonitorStateException success) {}
853	>	try {
854	>	c.awaitUninterruptibly();
855	>	shouldThrow();
856	>	} catch (IllegalMonitorStateException success) {}
857		}
858
859		/**
860		* Calling signal without holding lock throws IllegalMonitorStateException
861		*/
862		public void testSignal_IllegalMonitor() {
863	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
864		final Condition c = lock.writeLock().newCondition();
865		try {
866		c.signal();
867		shouldThrow();
868	<	}
464	<	catch (IllegalMonitorStateException success) {
465	<	}
466	<	catch (Exception ex) {
467	<	unexpectedException();
468	<	}
868	>	} catch (IllegalMonitorStateException success) {}
869		}
870
871		/**
872	<	* awaitNanos without a signal times out
872	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
873		*/
874	<	public void testAwaitNanos_Timeout() {
875	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
874	>	public void testSignalAll_IllegalMonitor() {
875	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
876		final Condition c = lock.writeLock().newCondition();
877		try {
878	<	lock.writeLock().lock();
879	<	long t = c.awaitNanos(100);
880	<	assertTrue(t <= 0);
481	<	lock.writeLock().unlock();
482	<	}
483	<	catch (Exception ex) {
484	<	unexpectedException();
485	<	}
878	>	c.signalAll();
879	>	shouldThrow();
880	>	} catch (IllegalMonitorStateException success) {}
881		}
882
883	+	/**
884	+	* awaitNanos without a signal times out
885	+	*/
886	+	public void testAwaitNanos_Timeout() throws InterruptedException {
887	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888	+	final Condition c = lock.writeLock().newCondition();
889	+	lock.writeLock().lock();
890	+	long startTime = System.nanoTime();
891	+	long timeoutMillis = 10;
892	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
893	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
894	+	assertTrue(nanosRemaining <= 0);
895	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
896	+	lock.writeLock().unlock();
897	+	}
898
899		/**
900	<	*  timed await without a signal times out
900	>	* timed await without a signal times out
901		*/
902	<	public void testAwait_Timeout() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	public void testAwait_Timeout() throws InterruptedException {
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904		final Condition c = lock.writeLock().newCondition();
905	<	try {
906	<	lock.writeLock().lock();
907	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
908	<	lock.writeLock().unlock();
909	<	}
910	<	catch (Exception ex) {
501	<	unexpectedException();
502	<	}
905	>	lock.writeLock().lock();
906	>	long startTime = System.nanoTime();
907	>	long timeoutMillis = 10;
908	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
909	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
910	>	lock.writeLock().unlock();
911		}
912
913		/**
914		* awaitUntil without a signal times out
915		*/
916	<	public void testAwaitUntil_Timeout() {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
916	>	public void testAwaitUntil_Timeout() throws InterruptedException {
917	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918		final Condition c = lock.writeLock().newCondition();
919	<	try {
920	<	lock.writeLock().lock();
921	<	java.util.Date d = new java.util.Date();
922	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
515	<	lock.writeLock().unlock();
516	<	}
517	<	catch (Exception ex) {
518	<	unexpectedException();
519	<	}
919	>	lock.writeLock().lock();
920	>	java.util.Date d = new java.util.Date();
921	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
922	>	lock.writeLock().unlock();
923		}
924
925		/**
926		* await returns when signalled
927		*/
928	<	public void testAwait() {
929	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	public void testAwait() throws InterruptedException {
929	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new Runnable() {
932	<	public void run() {
933	<	try {
934	<	lock.writeLock().lock();
935	<	c.await();
936	<	lock.writeLock().unlock();
937	<	}
938	<	catch(InterruptedException e) {
939	<	threadUnexpectedException();
940	<	}
941	<	}
942	<	});
943	<
944	<	try {
945	<	t.start();
543	<	Thread.sleep(SHORT_DELAY_MS);
544	<	lock.writeLock().lock();
545	<	c.signal();
546	<	lock.writeLock().unlock();
547	<	t.join(SHORT_DELAY_MS);
548	<	assertFalse(t.isAlive());
549	<	}
550	<	catch (Exception ex) {
551	<	unexpectedException();
552	<	}
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	lock.writeLock().lock();
935	>	locked.countDown();
936	>	c.await();
937	>	lock.writeLock().unlock();
938	>	}});
939	>
940	>	locked.await();
941	>	lock.writeLock().lock();
942	>	c.signal();
943	>	assertTrue(t.isAlive());
944	>	lock.writeLock().unlock();
945	>	awaitTermination(t);
946		}
947
948		/**
949		* awaitUninterruptibly doesn't abort on interrupt
950		*/
951	<	public void testAwaitUninterruptibly() {
952	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
951	>	public void testAwaitUninterruptibly() throws InterruptedException {
952	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953		final Condition c = lock.writeLock().newCondition();
954	<	Thread t = new Thread(new Runnable() {
955	<	public void run() {
956	<	lock.writeLock().lock();
957	<	c.awaitUninterruptibly();
958	<	lock.writeLock().unlock();
959	<	}
960	<	});
961	<
962	<	try {
963	<	t.start();
964	<	Thread.sleep(SHORT_DELAY_MS);
965	<	t.interrupt();
966	<	lock.writeLock().lock();
967	<	c.signal();
968	<	lock.writeLock().unlock();
969	<	assert(t.isInterrupted());
970	<	t.join(SHORT_DELAY_MS);
971	<	assertFalse(t.isAlive());
972	<	}
973	<	catch (Exception ex) {
974	<	unexpectedException();
582	<	}
954	>	final CountDownLatch locked = new CountDownLatch(1);
955	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
956	>	Thread t = newStartedThread(new CheckedRunnable() {
957	>	public void realRun() {
958	>	lock.writeLock().lock();
959	>	locked.countDown();
960	>	c.awaitUninterruptibly();
961	>	assertTrue(Thread.interrupted());
962	>	lock.writeLock().unlock();
963	>	}});
964	>
965	>	locked.await();
966	>	lock.writeLock().lock();
967	>	lock.writeLock().unlock();
968	>	t.interrupt();
969	>	t.join(10);
970	>	assertTrue(t.isAlive());
971	>	lock.writeLock().lock();
972	>	c.signal();
973	>	lock.writeLock().unlock();
974	>	awaitTermination(t);
975		}
976
977		/**
978		* await is interruptible
979		*/
980	<	public void testAwait_Interrupt() {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
980	>	public void testAwait_Interrupt() throws InterruptedException {
981	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
982		final Condition c = lock.writeLock().newCondition();
983	<	Thread t = new Thread(new Runnable() {
984	<	public void run() {
985	<	try {
986	<	lock.writeLock().lock();
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	threadShouldThrow();
990	<	}
991	<	catch(InterruptedException success) {
992	<	}
993	<	}
994	<	});
995	<
996	<	try {
997	<	t.start();
998	<	Thread.sleep(SHORT_DELAY_MS);
999	<	t.interrupt();
1000	<	t.join(SHORT_DELAY_MS);
1001	<	assertFalse(t.isAlive());
1002	<	}
1003	<	catch (Exception ex) {
1004	<	unexpectedException();
613	<	}
983	>	final CountDownLatch locked = new CountDownLatch(1);
984	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
985	>	public void realRun() throws InterruptedException {
986	>	lock.writeLock().lock();
987	>	assertWriteLockedBy(lock, Thread.currentThread());
988	>	assertHasNoWaiters(lock, c);
989	>	locked.countDown();
990	>	try {
991	>	c.await();
992	>	} finally {
993	>	assertWriteLockedBy(lock, Thread.currentThread());
994	>	assertHasNoWaiters(lock, c);
995	>	lock.writeLock().unlock();
996	>	assertFalse(Thread.interrupted());
997	>	}
998	>	}});
999	>
1000	>	locked.await();
1001	>	assertHasWaiters(lock, c, t);
1002	>	t.interrupt();
1003	>	awaitTermination(t);
1004	>	assertNotWriteLocked(lock);
1005		}
1006
1007		/**
1008		* awaitNanos is interruptible
1009		*/
1010	<	public void testAwaitNanos_Interrupt() {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
1011	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1012		final Condition c = lock.writeLock().newCondition();
1013	<	Thread t = new Thread(new Runnable() {
1014	<	public void run() {
1015	<	try {
1016	<	lock.writeLock().lock();
1017	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1018	<	lock.writeLock().unlock();
1019	<	threadShouldThrow();
1020	<	}
1021	<	catch(InterruptedException success) {
1022	<	}
1023	<	}
1024	<	});
1025	<
1026	<	try {
1027	<	t.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	t.interrupt();
1030	<	t.join(SHORT_DELAY_MS);
1031	<	assertFalse(t.isAlive());
1032	<	}
1033	<	catch (Exception ex) {
1034	<	unexpectedException();
644	<	}
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1015	>	public void realRun() throws InterruptedException {
1016	>	lock.writeLock().lock();
1017	>	assertWriteLockedBy(lock, Thread.currentThread());
1018	>	assertHasNoWaiters(lock, c);
1019	>	locked.countDown();
1020	>	try {
1021	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1022	>	} finally {
1023	>	assertWriteLockedBy(lock, Thread.currentThread());
1024	>	assertHasNoWaiters(lock, c);
1025	>	lock.writeLock().unlock();
1026	>	assertFalse(Thread.interrupted());
1027	>	}
1028	>	}});
1029	>
1030	>	locked.await();
1031	>	assertHasWaiters(lock, c, t);
1032	>	t.interrupt();
1033	>	awaitTermination(t);
1034	>	assertNotWriteLocked(lock);
1035		}
1036
1037		/**
1038		* awaitUntil is interruptible
1039		*/
1040	<	public void testAwaitUntil_Interrupt() {
1041	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1040	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
1041	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042		final Condition c = lock.writeLock().newCondition();
1043	<	Thread t = new Thread(new Runnable() {
1044	<	public void run() {
1045	<	try {
1046	<	lock.writeLock().lock();
1047	<	java.util.Date d = new java.util.Date();
1048	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1049	<	lock.writeLock().unlock();
1050	<	threadShouldThrow();
1051	<	}
1052	<	catch(InterruptedException success) {
1053	<	}
1054	<	}
1055	<	});
1056	<
1057	<	try {
1058	<	t.start();
1059	<	Thread.sleep(SHORT_DELAY_MS);
1060	<	t.interrupt();
1061	<	t.join(SHORT_DELAY_MS);
1062	<	assertFalse(t.isAlive());
1063	<	}
1064	<	catch (Exception ex) {
1065	<	unexpectedException();
676	<	}
1043	>	final CountDownLatch locked = new CountDownLatch(1);
1044	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1045	>	public void realRun() throws InterruptedException {
1046	>	lock.writeLock().lock();
1047	>	assertWriteLockedBy(lock, Thread.currentThread());
1048	>	assertHasNoWaiters(lock, c);
1049	>	locked.countDown();
1050	>	java.util.Date d = new java.util.Date();
1051	>	try {
1052	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1053	>	} finally {
1054	>	assertWriteLockedBy(lock, Thread.currentThread());
1055	>	assertHasNoWaiters(lock, c);
1056	>	lock.writeLock().unlock();
1057	>	assertFalse(Thread.interrupted());
1058	>	}
1059	>	}});
1060	>
1061	>	locked.await();
1062	>	assertHasWaiters(lock, c, t);
1063	>	t.interrupt();
1064	>	awaitTermination(t);
1065	>	assertNotWriteLocked(lock);
1066		}
1067
1068		/**
1069		* signalAll wakes up all threads
1070		*/
1071	<	public void testSignalAll() {
1072	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1071	>	public void testSignalAll() throws InterruptedException {
1072	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1073		final Condition c = lock.writeLock().newCondition();
1074	<	Thread t1 = new Thread(new Runnable() {
1075	<	public void run() {
1076	<	try {
1077	<	lock.writeLock().lock();
1078	<	c.await();
1079	<	lock.writeLock().unlock();
1080	<	}
1081	<	catch(InterruptedException e) {
1082	<	threadUnexpectedException();
1083	<	}
1084	<	}
1085	<	});
1086	<
1087	<	Thread t2 = new Thread(new Runnable() {
1088	<	public void run() {
1089	<	try {
1090	<	lock.writeLock().lock();
1091	<	c.await();
1092	<	lock.writeLock().unlock();
1093	<	}
1094	<	catch(InterruptedException e) {
1095	<	threadUnexpectedException();
1096	<	}
1097	<	}
1098	<	});
1099	<
1100	<	try {
1101	<	t1.start();
1102	<	t2.start();
1103	<	Thread.sleep(SHORT_DELAY_MS);
1104	<	lock.writeLock().lock();
1105	<	c.signalAll();
1106	<	lock.writeLock().unlock();
1107	<	t1.join(SHORT_DELAY_MS);
1108	<	t2.join(SHORT_DELAY_MS);
1109	<	assertFalse(t1.isAlive());
1110	<	assertFalse(t2.isAlive());
1111	<	}
1112	<	catch (Exception ex) {
1113	<	unexpectedException();
1114	<	}
1074	>	final CountDownLatch locked = new CountDownLatch(2);
1075	>	final Lock writeLock = lock.writeLock();
1076	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1077	>	public void realRun() throws InterruptedException {
1078	>	writeLock.lock();
1079	>	locked.countDown();
1080	>	c.await();
1081	>	writeLock.unlock();
1082	>	}});
1083	>
1084	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1085	>	public void realRun() throws InterruptedException {
1086	>	writeLock.lock();
1087	>	locked.countDown();
1088	>	c.await();
1089	>	writeLock.unlock();
1090	>	}});
1091	>
1092	>	locked.await();
1093	>	writeLock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095	>	c.signalAll();
1096	>	assertHasNoWaiters(lock, c);
1097	>	writeLock.unlock();
1098	>	awaitTermination(t1);
1099	>	awaitTermination(t2);
1100	>	}
1101	>
1102	>	/**
1103	>	* signal wakes up waiting threads in FIFO order.
1104	>	*/
1105	>	public void testSignalWakesFifo() throws InterruptedException {
1106	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1107	>	final Condition c = lock.writeLock().newCondition();
1108	>	final CountDownLatch locked1 = new CountDownLatch(1);
1109	>	final CountDownLatch locked2 = new CountDownLatch(1);
1110	>	final Lock writeLock = lock.writeLock();
1111	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1112	>	public void realRun() throws InterruptedException {
1113	>	writeLock.lock();
1114	>	locked1.countDown();
1115	>	c.await();
1116	>	writeLock.unlock();
1117	>	}});
1118	>
1119	>	locked1.await();
1120	>
1121	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked2.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked2.await();
1130	>
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	assertFalse(lock.hasQueuedThreads());
1134	>	c.signal();
1135	>	assertHasWaiters(lock, c, t2);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	c.signal();
1139	>	assertHasNoWaiters(lock, c);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	writeLock.unlock();
1143	>	awaitTermination(t1);
1144	>	awaitTermination(t2);
1145		}
1146
1147		/**
1148		* A serialized lock deserializes as unlocked
1149		*/
1150	<	public void testSerialization() {
1150	>	public void testSerialization() throws Exception {
1151		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1152		l.readLock().lock();
1153		l.readLock().unlock();
1154
1155	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1156	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1157	+	out.writeObject(l);
1158	+	out.close();
1159	+
1160	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1161	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1162	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1163	+	r.readLock().lock();
1164	+	r.readLock().unlock();
1165	+	}
1166	+
1167	+	/**
1168	+	* hasQueuedThreads reports whether there are waiting threads
1169	+	*/
1170	+	public void testhasQueuedThreads() throws InterruptedException {
1171	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1172	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1173	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1174	+	assertFalse(lock.hasQueuedThreads());
1175	+	lock.writeLock().lock();
1176	+	assertFalse(lock.hasQueuedThreads());
1177	+	long startTime = System.nanoTime();
1178	+	t1.start();
1179	+	waitForQueuedThread(lock, t1);
1180	+	t2.start();
1181	+	waitForQueuedThread(lock, t2);
1182	+	assertTrue(lock.hasQueuedThreads());
1183	+	t1.interrupt();
1184	+	awaitTermination(t1);
1185	+	assertTrue(lock.hasQueuedThreads());
1186	+	lock.writeLock().unlock();
1187	+	awaitTermination(t2);
1188	+	assertFalse(lock.hasQueuedThreads());
1189	+	}
1190	+
1191	+	/**
1192	+	* hasQueuedThread(null) throws NPE
1193	+	*/
1194	+	public void testHasQueuedThreadNPE() {
1195	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1196		try {
1197	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1198	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1199	<	out.writeObject(l);
1200	<	out.close();
1201	<
1202	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1203	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1204	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1205	<	r.readLock().lock();
1206	<	r.readLock().unlock();
1207	<	} catch(Exception e){
1208	<	e.printStackTrace();
1209	<	unexpectedException();
1210	<	}
1197	>	sync.hasQueuedThread(null);
1198	>	shouldThrow();
1199	>	} catch (NullPointerException success) {}
1200	>	}
1201	>
1202	>	/**
1203	>	* hasQueuedThread reports whether a thread is queued.
1204	>	*/
1205	>	public void testHasQueuedThread() throws InterruptedException {
1206	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1207	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1208	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1209	>	assertFalse(lock.hasQueuedThread(t1));
1210	>	assertFalse(lock.hasQueuedThread(t2));
1211	>	lock.writeLock().lock();
1212	>	long startTime = System.nanoTime();
1213	>	t1.start();
1214	>	waitForQueuedThread(lock, t1);
1215	>	assertTrue(lock.hasQueuedThread(t1));
1216	>	assertFalse(lock.hasQueuedThread(t2));
1217	>	t2.start();
1218	>	waitForQueuedThread(lock, t2);
1219	>	assertTrue(lock.hasQueuedThread(t1));
1220	>	assertTrue(lock.hasQueuedThread(t2));
1221	>	t1.interrupt();
1222	>	awaitTermination(t1);
1223	>	assertFalse(lock.hasQueuedThread(t1));
1224	>	assertTrue(lock.hasQueuedThread(t2));
1225	>	lock.writeLock().unlock();
1226	>	awaitTermination(t2);
1227	>	assertFalse(lock.hasQueuedThread(t1));
1228	>	assertFalse(lock.hasQueuedThread(t2));
1229	>	}
1230	>
1231	>	/**
1232	>	* getQueueLength reports number of waiting threads
1233	>	*/
1234	>	public void testGetQueueLength() throws InterruptedException {
1235	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1236	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1237	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1238	>	assertEquals(0, lock.getQueueLength());
1239	>	lock.writeLock().lock();
1240	>	long startTime = System.nanoTime();
1241	>	t1.start();
1242	>	waitForQueuedThread(lock, t1);
1243	>	assertEquals(1, lock.getQueueLength());
1244	>	t2.start();
1245	>	waitForQueuedThread(lock, t2);
1246	>	assertEquals(2, lock.getQueueLength());
1247	>	t1.interrupt();
1248	>	awaitTermination(t1);
1249	>	assertEquals(1, lock.getQueueLength());
1250	>	lock.writeLock().unlock();
1251	>	awaitTermination(t2);
1252	>	assertEquals(0, lock.getQueueLength());
1253	>	}
1254	>
1255	>	/**
1256	>	* getQueuedThreads includes waiting threads
1257	>	*/
1258	>	public void testGetQueuedThreads() throws InterruptedException {
1259	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1260	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262	>	assertTrue(lock.getQueuedThreads().isEmpty());
1263	>	lock.writeLock().lock();
1264	>	long startTime = System.nanoTime();
1265	>	assertTrue(lock.getQueuedThreads().isEmpty());
1266	>	t1.start();
1267	>	waitForQueuedThread(lock, t1);
1268	>	assertEquals(1, lock.getQueuedThreads().size());
1269	>	assertTrue(lock.getQueuedThreads().contains(t1));
1270	>	t2.start();
1271	>	waitForQueuedThread(lock, t2);
1272	>	assertEquals(2, lock.getQueuedThreads().size());
1273	>	assertTrue(lock.getQueuedThreads().contains(t1));
1274	>	assertTrue(lock.getQueuedThreads().contains(t2));
1275	>	t1.interrupt();
1276	>	awaitTermination(t1);
1277	>	assertFalse(lock.getQueuedThreads().contains(t1));
1278	>	assertTrue(lock.getQueuedThreads().contains(t2));
1279	>	assertEquals(1, lock.getQueuedThreads().size());
1280	>	lock.writeLock().unlock();
1281	>	awaitTermination(t2);
1282	>	assertTrue(lock.getQueuedThreads().isEmpty());
1283	>	}
1284	>
1285	>	/**
1286	>	* hasWaiters throws NPE if null
1287	>	*/
1288	>	public void testHasWaitersNPE() {
1289	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1290	>	try {
1291	>	lock.hasWaiters(null);
1292	>	shouldThrow();
1293	>	} catch (NullPointerException success) {}
1294		}
1295
1296	+	/**
1297	+	* getWaitQueueLength throws NPE if null
1298	+	*/
1299	+	public void testGetWaitQueueLengthNPE() {
1300	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1301	+	try {
1302	+	lock.getWaitQueueLength(null);
1303	+	shouldThrow();
1304	+	} catch (NullPointerException success) {}
1305	+	}
1306	+
1307	+	/**
1308	+	* getWaitingThreads throws NPE if null
1309	+	*/
1310	+	public void testGetWaitingThreadsNPE() {
1311	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1312	+	try {
1313	+	lock.getWaitingThreads(null);
1314	+	shouldThrow();
1315	+	} catch (NullPointerException success) {}
1316	+	}
1317	+
1318	+	/**
1319	+	* hasWaiters throws IAE if not owned
1320	+	*/
1321	+	public void testHasWaitersIAE() {
1322	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1323	+	final Condition c = lock.writeLock().newCondition();
1324	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1325	+	try {
1326	+	lock2.hasWaiters(c);
1327	+	shouldThrow();
1328	+	} catch (IllegalArgumentException success) {}
1329	+	}
1330	+
1331	+	/**
1332	+	* hasWaiters throws IMSE if not locked
1333	+	*/
1334	+	public void testHasWaitersIMSE() {
1335	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1336	+	final Condition c = lock.writeLock().newCondition();
1337	+	try {
1338	+	lock.hasWaiters(c);
1339	+	shouldThrow();
1340	+	} catch (IllegalMonitorStateException success) {}
1341	+	}
1342	+
1343	+	/**
1344	+	* getWaitQueueLength throws IAE if not owned
1345	+	*/
1346	+	public void testGetWaitQueueLengthIAE() {
1347	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	+	final Condition c = lock.writeLock().newCondition();
1349	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1350	+	try {
1351	+	lock2.getWaitQueueLength(c);
1352	+	shouldThrow();
1353	+	} catch (IllegalArgumentException success) {}
1354	+	}
1355	+
1356	+	/**
1357	+	* getWaitQueueLength throws IMSE if not locked
1358	+	*/
1359	+	public void testGetWaitQueueLengthIMSE() {
1360	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1361	+	final Condition c = lock.writeLock().newCondition();
1362	+	try {
1363	+	lock.getWaitQueueLength(c);
1364	+	shouldThrow();
1365	+	} catch (IllegalMonitorStateException success) {}
1366	+	}
1367	+
1368	+	/**
1369	+	* getWaitingThreads throws IAE if not owned
1370	+	*/
1371	+	public void testGetWaitingThreadsIAE() {
1372	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1373	+	final Condition c = lock.writeLock().newCondition();
1374	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1375	+	try {
1376	+	lock2.getWaitingThreads(c);
1377	+	shouldThrow();
1378	+	} catch (IllegalArgumentException success) {}
1379	+	}
1380	+
1381	+	/**
1382	+	* getWaitingThreads throws IMSE if not locked
1383	+	*/
1384	+	public void testGetWaitingThreadsIMSE() {
1385	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1386	+	final Condition c = lock.writeLock().newCondition();
1387	+	try {
1388	+	lock.getWaitingThreads(c);
1389	+	shouldThrow();
1390	+	} catch (IllegalMonitorStateException success) {}
1391	+	}
1392	+
1393	+	/**
1394	+	* hasWaiters returns true when a thread is waiting, else false
1395	+	*/
1396	+	public void testHasWaiters() throws InterruptedException {
1397	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1398	+	final Condition c = lock.writeLock().newCondition();
1399	+	final CountDownLatch locked = new CountDownLatch(1);
1400	+	Thread t = newStartedThread(new CheckedRunnable() {
1401	+	public void realRun() throws InterruptedException {
1402	+	lock.writeLock().lock();
1403	+	assertFalse(lock.hasWaiters(c));
1404	+	locked.countDown();
1405	+	assertEquals(0, lock.getWaitQueueLength(c));
1406	+	c.await();
1407	+	lock.writeLock().unlock();
1408	+	}});
1409	+
1410	+	locked.await();
1411	+	lock.writeLock().lock();
1412	+	assertTrue(lock.hasWaiters(c));
1413	+	assertEquals(1, lock.getWaitQueueLength(c));
1414	+	c.signal();
1415	+	assertHasNoWaiters(lock, c);
1416	+	lock.writeLock().unlock();
1417	+	awaitTermination(t);
1418	+	assertHasNoWaiters(lock, c);
1419	+	}
1420	+
1421	+	/**
1422	+	* getWaitQueueLength returns number of waiting threads
1423	+	*/
1424	+	public void testGetWaitQueueLength() throws InterruptedException {
1425	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1426	+	final Condition c = lock.writeLock().newCondition();
1427	+	final CountDownLatch locked = new CountDownLatch(1);
1428	+	Thread t = newStartedThread(new CheckedRunnable() {
1429	+	public void realRun() throws InterruptedException {
1430	+	lock.writeLock().lock();
1431	+	assertEquals(0, lock.getWaitQueueLength(c));
1432	+	locked.countDown();
1433	+	c.await();
1434	+	lock.writeLock().unlock();
1435	+	}});
1436	+
1437	+	locked.await();
1438	+	lock.writeLock().lock();
1439	+	assertHasWaiters(lock, c, t);
1440	+	assertEquals(1, lock.getWaitQueueLength(c));
1441	+	c.signal();
1442	+	assertHasNoWaiters(lock, c);
1443	+	assertEquals(0, lock.getWaitQueueLength(c));
1444	+	lock.writeLock().unlock();
1445	+	awaitTermination(t);
1446	+	}
1447	+
1448	+	/**
1449	+	* getWaitingThreads returns only and all waiting threads
1450	+	*/
1451	+	public void testGetWaitingThreads() throws InterruptedException {
1452	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1453	+	final Condition c = lock.writeLock().newCondition();
1454	+	final CountDownLatch locked1 = new CountDownLatch(1);
1455	+	final CountDownLatch locked2 = new CountDownLatch(1);
1456	+	Thread t1 = new Thread(new CheckedRunnable() {
1457	+	public void realRun() throws InterruptedException {
1458	+	lock.writeLock().lock();
1459	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1460	+	locked1.countDown();
1461	+	c.await();
1462	+	lock.writeLock().unlock();
1463	+	}});
1464	+
1465	+	Thread t2 = new Thread(new CheckedRunnable() {
1466	+	public void realRun() throws InterruptedException {
1467	+	lock.writeLock().lock();
1468	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1469	+	locked2.countDown();
1470	+	c.await();
1471	+	lock.writeLock().unlock();
1472	+	}});
1473	+
1474	+	lock.writeLock().lock();
1475	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1476	+	lock.writeLock().unlock();
1477	+
1478	+	t1.start();
1479	+	locked1.await();
1480	+	t2.start();
1481	+	locked2.await();
1482	+
1483	+	lock.writeLock().lock();
1484	+	assertTrue(lock.hasWaiters(c));
1485	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1486	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1487	+	assertEquals(2, lock.getWaitingThreads(c).size());
1488	+	c.signalAll();
1489	+	assertHasNoWaiters(lock, c);
1490	+	lock.writeLock().unlock();
1491	+
1492	+	awaitTermination(t1);
1493	+	awaitTermination(t2);
1494	+
1495	+	assertHasNoWaiters(lock, c);
1496	+	}
1497	+
1498	+	/**
1499	+	* toString indicates current lock state
1500	+	*/
1501	+	public void testToString() {
1502	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1503	+	String us = lock.toString();
1504	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1505	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1506	+	lock.writeLock().lock();
1507	+	String ws = lock.toString();
1508	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1509	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1510	+	lock.writeLock().unlock();
1511	+	lock.readLock().lock();
1512	+	lock.readLock().lock();
1513	+	String rs = lock.toString();
1514	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1515	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1516	+	}
1517	+
1518	+	/**
1519	+	* readLock.toString indicates current lock state
1520	+	*/
1521	+	public void testReadLockToString() {
1522	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1523	+	String us = lock.readLock().toString();
1524	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1525	+	lock.readLock().lock();
1526	+	lock.readLock().lock();
1527	+	String rs = lock.readLock().toString();
1528	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1529	+	}
1530	+
1531	+	/**
1532	+	* writeLock.toString indicates current lock state
1533	+	*/
1534	+	public void testWriteLockToString() {
1535	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1536	+	String us = lock.writeLock().toString();
1537	+	assertTrue(us.indexOf("Unlocked") >= 0);
1538	+	lock.writeLock().lock();
1539	+	String ls = lock.writeLock().toString();
1540	+	assertTrue(ls.indexOf("Locked") >= 0);
1541	+	}
1542
1543		}

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