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

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