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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.16 by dl, Wed Jan 7 01:02:17 2004 UTC vs.
Revision 1.60 by jsr166, Mon May 9 20:00:19 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56		}
57	<	public Collection<Thread> getWaitingThreads(Condition c) {
58	<	return super.getWaitingThreads(c);
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62		}
63		}
64
65		/**
66	<	* Constructor sets given fairness, and is in unlocked state
66	>	* Releases write lock, checking that it had a hold count of 1.
67		*/
68	<	public void testConstructor() {
69	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
70	<	assertFalse(rl.isFair());
71	<	assertFalse(rl.isWriteLocked());
72	<	assertEquals(0, rl.getReadLockCount());
73	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	<	assertTrue(r2.isFair());
75	<	assertFalse(r2.isWriteLocked());
76	<	assertEquals(0, r2.getReadLockCount());
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedBy(lock, Thread.currentThread());
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* write-locking and read-locking an unlocked lock succeed
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<	public void testLock() {
80	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	<	rl.writeLock().lock();
82	<	assertTrue(rl.isWriteLocked());
83	<	assertTrue(rl.isWriteLockedByCurrentThread());
84	<	assertEquals(0, rl.getReadLockCount());
85	<	rl.writeLock().unlock();
86	<	assertFalse(rl.isWriteLocked());
87	<	assertFalse(rl.isWriteLockedByCurrentThread());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.readLock().lock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
95	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	assertEquals(0, rl.getReadLockCount());
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new 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	<	* locking an unlocked fair lock succeeds
103	<	*/
104	<	public void testFairLock() {
105	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
106	<	rl.writeLock().lock();
107	<	assertTrue(rl.isWriteLocked());
108	<	assertTrue(rl.isWriteLockedByCurrentThread());
109	<	assertEquals(0, rl.getReadLockCount());
110	<	rl.writeLock().unlock();
111	<	assertFalse(rl.isWriteLocked());
112	<	assertFalse(rl.isWriteLockedByCurrentThread());
113	<	assertEquals(0, rl.getReadLockCount());
116	<	rl.readLock().lock();
117	<	assertFalse(rl.isWriteLocked());
118	<	assertFalse(rl.isWriteLockedByCurrentThread());
119	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
102	>	* Checks that lock is write-locked by the given thread.
103	>	*/
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	<	* getWriteHoldCount returns number of recursive holds
117	>	* Checks that condition c has no waiters.
118		*/
119	<	public void testGetHoldCount() {
120	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
131	<	for(int i = 1; i <= SIZE; i++) {
132	<	lock.writeLock().lock();
133	<	assertEquals(i,lock.getWriteHoldCount());
134	<	}
135	<	for(int i = SIZE; i > 0; i--) {
136	<	lock.writeLock().unlock();
137	<	assertEquals(i-1,lock.getWriteHoldCount());
138	<	}
119	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	>	assertHasWaiters(lock, c, new Thread[] {});
121		}
140	–
122
123		/**
124	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
124	>	* Checks that condition c has exactly the given waiter threads.
125		*/
126	<	public void testUnlock_IllegalMonitorStateException() {
127	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
128	<	try {
129	<	rl.writeLock().unlock();
130	<	shouldThrow();
131	<	} catch(IllegalMonitorStateException success){}
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	+	enum AwaitMethod { await, awaitNanos, awaitUntil };
139
140		/**
141	<	* write-lockInterruptibly is interruptible
141	>	* Awaits condition using the specified AwaitMethod
142		*/
143	<	public void testWriteLockInterruptibly_Interrupted() {
144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
145	<	Thread t = new Thread(new Runnable() {
146	<	public void run() {
147	<	try {
148	<	lock.writeLock().lockInterruptibly();
149	<	lock.writeLock().unlock();
150	<	lock.writeLock().lockInterruptibly();
151	<	lock.writeLock().unlock();
152	<	} catch(InterruptedException success){}
153	<	}
154	<	});
155	<	try {
156	<	lock.writeLock().lock();
171	<	t.start();
172	<	t.interrupt();
173	<	lock.writeLock().unlock();
174	<	t.join();
175	<	} catch(Exception e){
176	<	unexpectedException();
143	>	void await(Condition c, AwaitMethod awaitMethod)
144	>	throws InterruptedException {
145	>	switch (awaitMethod) {
146	>	case await:
147	>	c.await();
148	>	break;
149	>	case awaitNanos:
150	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
151	>	assertTrue(nanosRemaining > 0);
152	>	break;
153	>	case awaitUntil:
154	>	java.util.Date d = new java.util.Date();
155	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
156	>	break;
157		}
158	<	}
158	>	}
159
160		/**
161	<	* timed write-tryLock is interruptible
161	>	* Constructor sets given fairness, and is in unlocked state
162		*/
163	<	public void testWriteTryLock_Interrupted() {
164	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	lock.writeLock().lock();
166	<	Thread t = new Thread(new Runnable() {
167	<	public void run() {
168	<	try {
169	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
170	<	threadShouldThrow();
171	<	} catch(InterruptedException success){}
172	<	}
173	<	});
174	<	try {
175	<	t.start();
176	<	t.interrupt();
177	<	lock.writeLock().unlock();
178	<	t.join();
179	<	} catch(Exception e){
200	<	unexpectedException();
201	<	}
163	>	public void testConstructor() {
164	>	PublicReentrantReadWriteLock lock;
165	>
166	>	lock = new PublicReentrantReadWriteLock();
167	>	assertFalse(lock.isFair());
168	>	assertNotWriteLocked(lock);
169	>	assertEquals(0, lock.getReadLockCount());
170	>
171	>	lock = new PublicReentrantReadWriteLock(true);
172	>	assertTrue(lock.isFair());
173	>	assertNotWriteLocked(lock);
174	>	assertEquals(0, lock.getReadLockCount());
175	>
176	>	lock = new PublicReentrantReadWriteLock(false);
177	>	assertFalse(lock.isFair());
178	>	assertNotWriteLocked(lock);
179	>	assertEquals(0, lock.getReadLockCount());
180		}
181
182		/**
183	<	* read-lockInterruptibly is interruptible
183	>	* write-locking and read-locking an unlocked lock succeed
184		*/
185	<	public void testReadLockInterruptibly_Interrupted() {
186	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	lock.writeLock().lock();
188	<	Thread t = new Thread(new Runnable() {
189	<	public void run() {
190	<	try {
191	<	lock.readLock().lockInterruptibly();
192	<	} catch(InterruptedException success){}
193	<	}
194	<	});
195	<	try {
196	<	t.start();
197	<	t.interrupt();
185	>	public void testLock()      { testLock(false); }
186	>	public void testLock_fair() { testLock(true); }
187	>	public void testLock(boolean fair) {
188	>	PublicReentrantReadWriteLock lock =
189	>	new PublicReentrantReadWriteLock(fair);
190	>	assertNotWriteLocked(lock);
191	>	lock.writeLock().lock();
192	>	assertWriteLockedBy(lock, Thread.currentThread());
193	>	lock.writeLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196	>	lock.readLock().lock();
197	>	assertNotWriteLocked(lock);
198	>	assertEquals(1, lock.getReadLockCount());
199	>	lock.readLock().unlock();
200	>	assertNotWriteLocked(lock);
201	>	assertEquals(0, lock.getReadLockCount());
202	>	}
203	>
204	>	/**
205	>	* getWriteHoldCount returns number of recursive holds
206	>	*/
207	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
208	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
209	>	public void testGetWriteHoldCount(boolean fair) {
210	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
211	>	for (int i = 1; i <= SIZE; i++) {
212	>	lock.writeLock().lock();
213	>	assertEquals(i,lock.getWriteHoldCount());
214	>	}
215	>	for (int i = SIZE; i > 0; i--) {
216		lock.writeLock().unlock();
217	<	t.join();
222	<	} catch(Exception e){
223	<	unexpectedException();
217	>	assertEquals(i-1,lock.getWriteHoldCount());
218		}
219	<	}
219	>	}
220
221		/**
222	<	* timed read-tryLock is interruptible
222	>	* writelock.getHoldCount returns number of recursive holds
223		*/
224	<	public void testReadTryLock_Interrupted() {
225	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
226	<	lock.writeLock().lock();
227	<	Thread t = new Thread(new Runnable() {
228	<	public void run() {
229	<	try {
230	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
231	<	threadShouldThrow();
232	<	} catch(InterruptedException success){}
233	<	}
234	<	});
241	<	try {
242	<	t.start();
243	<	t.interrupt();
244	<	t.join();
245	<	} catch(Exception e){
246	<	unexpectedException();
224	>	public void testGetHoldCount()      { testGetHoldCount(false); }
225	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
226	>	public void testGetHoldCount(boolean fair) {
227	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
228	>	for (int i = 1; i <= SIZE; i++) {
229	>	lock.writeLock().lock();
230	>	assertEquals(i,lock.writeLock().getHoldCount());
231	>	}
232	>	for (int i = SIZE; i > 0; i--) {
233	>	lock.writeLock().unlock();
234	>	assertEquals(i-1,lock.writeLock().getHoldCount());
235		}
236		}
237
250	–
238		/**
239	<	* write-tryLock fails if locked
239	>	* getReadHoldCount returns number of recursive holds
240		*/
241	<	public void testWriteTryLockWhenLocked() {
242	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
243	<	lock.writeLock().lock();
244	<	Thread t = new Thread(new Runnable() {
245	<	public void run() {
246	<	threadAssertFalse(lock.writeLock().tryLock());
247	<	}
248	<	});
249	<	try {
250	<	t.start();
251	<	t.join();
265	<	lock.writeLock().unlock();
266	<	} catch(Exception e){
267	<	unexpectedException();
241	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
242	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
243	>	public void testGetReadHoldCount(boolean fair) {
244	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
245	>	for (int i = 1; i <= SIZE; i++) {
246	>	lock.readLock().lock();
247	>	assertEquals(i,lock.getReadHoldCount());
248	>	}
249	>	for (int i = SIZE; i > 0; i--) {
250	>	lock.readLock().unlock();
251	>	assertEquals(i-1,lock.getReadHoldCount());
252		}
253	<	}
253	>	}
254
255		/**
256	<	* read-tryLock fails if locked
256	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
257		*/
258	<	public void testReadTryLockWhenLocked() {
259	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
260	<	lock.writeLock().lock();
261	<	Thread t = new Thread(new Runnable() {
278	<	public void run() {
279	<	threadAssertFalse(lock.readLock().tryLock());
280	<	}
281	<	});
258	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
259	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
260	>	public void testWriteUnlock_IMSE(boolean fair) {
261	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
262		try {
283	–	t.start();
284	–	t.join();
263		lock.writeLock().unlock();
264	<	} catch(Exception e){
265	<	unexpectedException();
266	<	}
289	<	}
264	>	shouldThrow();
265	>	} catch (IllegalMonitorStateException success) {}
266	>	}
267
268		/**
269	<	* Multiple threads can hold a read lock when not write-locked
269	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
270		*/
271	<	public void testMultipleReadLocks() {
272	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
273	<	lock.readLock().lock();
274	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	threadAssertTrue(lock.readLock().tryLock());
300	<	lock.readLock().unlock();
301	<	}
302	<	});
271	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
272	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
273	>	public void testReadUnlock_IMSE(boolean fair) {
274	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
275		try {
304	–	t.start();
305	–	t.join();
276		lock.readLock().unlock();
277	<	} catch(Exception e){
278	<	unexpectedException();
279	<	}
310	<	}
277	>	shouldThrow();
278	>	} catch (IllegalMonitorStateException success) {}
279	>	}
280
281		/**
282	<	* A writelock succeeds after reading threads unlock
282	>	* write-lockInterruptibly is interruptible
283		*/
284	<	public void testWriteAfterMultipleReadLocks() {
285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	<	lock.readLock().lock();
287	<	Thread t1 = new Thread(new Runnable() {
288	<	public void run() {
289	<	lock.readLock().lock();
290	<	lock.readLock().unlock();
291	<	}
292	<	});
293	<	Thread t2 = new Thread(new Runnable() {
325	<	public void run() {
326	<	lock.writeLock().lock();
327	<	lock.writeLock().unlock();
328	<	}
329	<	});
284	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
285	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
286	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
287	>	final PublicReentrantReadWriteLock lock =
288	>	new PublicReentrantReadWriteLock(fair);
289	>	lock.writeLock().lock();
290	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
291	>	public void realRun() throws InterruptedException {
292	>	lock.writeLock().lockInterruptibly();
293	>	}});
294
295	<	try {
296	<	t1.start();
297	<	t2.start();
298	<	Thread.sleep(SHORT_DELAY_MS);
299	<	lock.readLock().unlock();
336	<	t1.join(MEDIUM_DELAY_MS);
337	<	t2.join(MEDIUM_DELAY_MS);
338	<	assertTrue(!t1.isAlive());
339	<	assertTrue(!t2.isAlive());
340	<
341	<	} catch(Exception e){
342	<	unexpectedException();
343	<	}
344	<	}
295	>	waitForQueuedThread(lock, t);
296	>	t.interrupt();
297	>	awaitTermination(t);
298	>	releaseWriteLock(lock);
299	>	}
300
301		/**
302	<	* Readlocks succeed after a writing thread unlocks
302	>	* timed write-tryLock is interruptible
303		*/
304	<	public void testReadAfterWriteLock() {
305	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
306	<	lock.writeLock().lock();
307	<	Thread t1 = new Thread(new Runnable() {
308	<	public void run() {
309	<	lock.readLock().lock();
310	<	lock.readLock().unlock();
311	<	}
312	<	});
313	<	Thread t2 = new Thread(new Runnable() {
314	<	public void run() {
315	<	lock.readLock().lock();
316	<	lock.readLock().unlock();
317	<	}
318	<	});
304	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
305	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
306	>	public void testWriteTryLock_Interruptible(boolean fair) {
307	>	final PublicReentrantReadWriteLock lock =
308	>	new PublicReentrantReadWriteLock(fair);
309	>	lock.writeLock().lock();
310	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311	>	public void realRun() throws InterruptedException {
312	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
313	>	}});
314	>
315	>	waitForQueuedThread(lock, t);
316	>	t.interrupt();
317	>	awaitTermination(t);
318	>	releaseWriteLock(lock);
319	>	}
320
321	<	try {
322	<	t1.start();
323	<	t2.start();
324	<	Thread.sleep(SHORT_DELAY_MS);
325	<	lock.writeLock().unlock();
326	<	t1.join(MEDIUM_DELAY_MS);
327	<	t2.join(MEDIUM_DELAY_MS);
328	<	assertTrue(!t1.isAlive());
329	<	assertTrue(!t2.isAlive());
330	<
331	<	} catch(Exception e){
332	<	unexpectedException();
333	<	}
334	<	}
321	>	/**
322	>	* read-lockInterruptibly is interruptible
323	>	*/
324	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
325	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
326	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
327	>	final PublicReentrantReadWriteLock lock =
328	>	new PublicReentrantReadWriteLock(fair);
329	>	lock.writeLock().lock();
330	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
331	>	public void realRun() throws InterruptedException {
332	>	lock.readLock().lockInterruptibly();
333	>	}});
334	>
335	>	waitForQueuedThread(lock, t);
336	>	t.interrupt();
337	>	awaitTermination(t);
338	>	releaseWriteLock(lock);
339	>	}
340	>
341	>	/**
342	>	* timed read-tryLock is interruptible
343	>	*/
344	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
345	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
346	>	public void testReadTryLock_Interruptible(boolean fair) {
347	>	final PublicReentrantReadWriteLock lock =
348	>	new PublicReentrantReadWriteLock(fair);
349	>	lock.writeLock().lock();
350	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
351	>	public void realRun() throws InterruptedException {
352	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
353	>	}});
354	>
355	>	waitForQueuedThread(lock, t);
356	>	t.interrupt();
357	>	awaitTermination(t);
358	>	releaseWriteLock(lock);
359	>	}
360	>
361	>	/**
362	>	* write-tryLock fails if locked
363	>	*/
364	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
365	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
366	>	public void testWriteTryLockWhenLocked(boolean fair) {
367	>	final PublicReentrantReadWriteLock lock =
368	>	new PublicReentrantReadWriteLock(fair);
369	>	lock.writeLock().lock();
370	>	Thread t = newStartedThread(new CheckedRunnable() {
371	>	public void realRun() {
372	>	assertFalse(lock.writeLock().tryLock());
373	>	}});
374
375	+	awaitTermination(t);
376	+	releaseWriteLock(lock);
377	+	}
378	+
379	+	/**
380	+	* read-tryLock fails if locked
381	+	*/
382	+	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
383	+	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
384	+	public void testReadTryLockWhenLocked(boolean fair) {
385	+	final PublicReentrantReadWriteLock lock =
386	+	new PublicReentrantReadWriteLock(fair);
387	+	lock.writeLock().lock();
388	+	Thread t = newStartedThread(new CheckedRunnable() {
389	+	public void realRun() {
390	+	assertFalse(lock.readLock().tryLock());
391	+	}});
392	+
393	+	awaitTermination(t);
394	+	releaseWriteLock(lock);
395	+	}
396	+
397	+	/**
398	+	* Multiple threads can hold a read lock when not write-locked
399	+	*/
400	+	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
401	+	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
402	+	public void testMultipleReadLocks(boolean fair) {
403	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
404	+	lock.readLock().lock();
405	+	Thread t = newStartedThread(new CheckedRunnable() {
406	+	public void realRun() throws InterruptedException {
407	+	assertTrue(lock.readLock().tryLock());
408	+	lock.readLock().unlock();
409	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
410	+	lock.readLock().unlock();
411	+	lock.readLock().lock();
412	+	lock.readLock().unlock();
413	+	}});
414	+
415	+	awaitTermination(t);
416	+	lock.readLock().unlock();
417	+	}
418	+
419	+	/**
420	+	* A writelock succeeds only after a reading thread unlocks
421	+	*/
422	+	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
423	+	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
424	+	public void testWriteAfterReadLock(boolean fair) {
425	+	final PublicReentrantReadWriteLock lock =
426	+	new PublicReentrantReadWriteLock(fair);
427	+	lock.readLock().lock();
428	+	Thread t = newStartedThread(new CheckedRunnable() {
429	+	public void realRun() {
430	+	assertEquals(1, lock.getReadLockCount());
431	+	lock.writeLock().lock();
432	+	assertEquals(0, lock.getReadLockCount());
433	+	lock.writeLock().unlock();
434	+	}});
435	+	waitForQueuedThread(lock, t);
436	+	assertNotWriteLocked(lock);
437	+	assertEquals(1, lock.getReadLockCount());
438	+	lock.readLock().unlock();
439	+	assertEquals(0, lock.getReadLockCount());
440	+	awaitTermination(t);
441	+	assertNotWriteLocked(lock);
442	+	}
443	+
444	+	/**
445	+	* A writelock succeeds only after reading threads unlock
446	+	*/
447	+	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
448	+	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
449	+	public void testWriteAfterMultipleReadLocks(boolean fair) {
450	+	final PublicReentrantReadWriteLock lock =
451	+	new PublicReentrantReadWriteLock(fair);
452	+	lock.readLock().lock();
453	+	lock.readLock().lock();
454	+	Thread t1 = newStartedThread(new CheckedRunnable() {
455	+	public void realRun() {
456	+	lock.readLock().lock();
457	+	assertEquals(3, lock.getReadLockCount());
458	+	lock.readLock().unlock();
459	+	}});
460	+	awaitTermination(t1);
461	+
462	+	Thread t2 = newStartedThread(new CheckedRunnable() {
463	+	public void realRun() {
464	+	assertEquals(2, lock.getReadLockCount());
465	+	lock.writeLock().lock();
466	+	assertEquals(0, lock.getReadLockCount());
467	+	lock.writeLock().unlock();
468	+	}});
469	+	waitForQueuedThread(lock, t2);
470	+	assertNotWriteLocked(lock);
471	+	assertEquals(2, lock.getReadLockCount());
472	+	lock.readLock().unlock();
473	+	lock.readLock().unlock();
474	+	assertEquals(0, lock.getReadLockCount());
475	+	awaitTermination(t2);
476	+	assertNotWriteLocked(lock);
477	+	}
478	+
479	+	/**
480	+	* A thread that tries to acquire a fair read lock (non-reentrantly)
481	+	* will block if there is a waiting writer thread.
482	+	*/
483	+	public void testReaderWriterReaderFairFifo() {
484	+	final PublicReentrantReadWriteLock lock =
485	+	new PublicReentrantReadWriteLock(true);
486	+	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
487	+
488	+	lock.readLock().lock();
489	+	Thread t1 = newStartedThread(new CheckedRunnable() {
490	+	public void realRun() {
491	+	assertEquals(1, lock.getReadLockCount());
492	+	lock.writeLock().lock();
493	+	assertEquals(0, lock.getReadLockCount());
494	+	t1GotLock.set(true);
495	+	lock.writeLock().unlock();
496	+	}});
497	+	waitForQueuedThread(lock, t1);
498	+
499	+	Thread t2 = newStartedThread(new CheckedRunnable() {
500	+	public void realRun() {
501	+	assertEquals(1, lock.getReadLockCount());
502	+	lock.readLock().lock();
503	+	assertEquals(1, lock.getReadLockCount());
504	+	assertTrue(t1GotLock.get());
505	+	lock.readLock().unlock();
506	+	}});
507	+	waitForQueuedThread(lock, t2);
508	+	assertTrue(t1.isAlive());
509	+	assertNotWriteLocked(lock);
510	+	assertEquals(1, lock.getReadLockCount());
511	+	lock.readLock().unlock();
512	+	awaitTermination(t1);
513	+	awaitTermination(t2);
514	+	assertNotWriteLocked(lock);
515	+	}
516	+
517	+	/**
518	+	* Readlocks succeed only after a writing thread unlocks
519	+	*/
520	+	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
521	+	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
522	+	public void testReadAfterWriteLock(boolean fair) {
523	+	final PublicReentrantReadWriteLock lock =
524	+	new PublicReentrantReadWriteLock(fair);
525	+	lock.writeLock().lock();
526	+	Thread t1 = newStartedThread(new CheckedRunnable() {
527	+	public void realRun() {
528	+	lock.readLock().lock();
529	+	lock.readLock().unlock();
530	+	}});
531	+	Thread t2 = newStartedThread(new CheckedRunnable() {
532	+	public void realRun() {
533	+	lock.readLock().lock();
534	+	lock.readLock().unlock();
535	+	}});
536	+
537	+	waitForQueuedThread(lock, t1);
538	+	waitForQueuedThread(lock, t2);
539	+	releaseWriteLock(lock);
540	+	awaitTermination(t1);
541	+	awaitTermination(t2);
542	+	}
543	+
544	+	/**
545	+	* Read trylock succeeds if write locked by current thread
546	+	*/
547	+	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
548	+	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
549	+	public void testReadHoldingWriteLock(boolean fair) {
550	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
551	+	lock.writeLock().lock();
552	+	assertTrue(lock.readLock().tryLock());
553	+	lock.readLock().unlock();
554	+	lock.writeLock().unlock();
555	+	}
556	+
557	+	/**
558	+	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
559	+	*/
560	+	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
561	+	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
562	+	public void testReadTryLockBarging(boolean fair) {
563	+	final PublicReentrantReadWriteLock lock =
564	+	new PublicReentrantReadWriteLock(fair);
565	+	lock.readLock().lock();
566	+
567	+	Thread t1 = newStartedThread(new CheckedRunnable() {
568	+	public void realRun() {
569	+	lock.writeLock().lock();
570	+	lock.writeLock().unlock();
571	+	}});
572	+
573	+	waitForQueuedThread(lock, t1);
574	+
575	+	Thread t2 = newStartedThread(new CheckedRunnable() {
576	+	public void realRun() {
577	+	lock.readLock().lock();
578	+	lock.readLock().unlock();
579	+	}});
580	+
581	+	if (fair)
582	+	waitForQueuedThread(lock, t2);
583	+
584	+	Thread t3 = newStartedThread(new CheckedRunnable() {
585	+	public void realRun() {
586	+	lock.readLock().tryLock();
587	+	lock.readLock().unlock();
588	+	}});
589	+
590	+	assertTrue(lock.getReadLockCount() > 0);
591	+	awaitTermination(t3);
592	+	assertTrue(t1.isAlive());
593	+	if (fair) assertTrue(t2.isAlive());
594	+	lock.readLock().unlock();
595	+	awaitTermination(t1);
596	+	awaitTermination(t2);
597	+	}
598	+
599	+	/**
600	+	* Read lock succeeds if write locked by current thread even if
601	+	* other threads are waiting for readlock
602	+	*/
603	+	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
604	+	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
605	+	public void testReadHoldingWriteLock2(boolean fair) {
606	+	final PublicReentrantReadWriteLock lock =
607	+	new PublicReentrantReadWriteLock(fair);
608	+	lock.writeLock().lock();
609	+	lock.readLock().lock();
610	+	lock.readLock().unlock();
611	+
612	+	Thread t1 = newStartedThread(new CheckedRunnable() {
613	+	public void realRun() {
614	+	lock.readLock().lock();
615	+	lock.readLock().unlock();
616	+	}});
617	+	Thread t2 = newStartedThread(new CheckedRunnable() {
618	+	public void realRun() {
619	+	lock.readLock().lock();
620	+	lock.readLock().unlock();
621	+	}});
622	+
623	+	waitForQueuedThread(lock, t1);
624	+	waitForQueuedThread(lock, t2);
625	+	assertWriteLockedBy(lock, Thread.currentThread());
626	+	lock.readLock().lock();
627	+	lock.readLock().unlock();
628	+	releaseWriteLock(lock);
629	+	awaitTermination(t1);
630	+	awaitTermination(t2);
631	+	}
632	+
633	+	/**
634	+	* Read lock succeeds if write locked by current thread even if
635	+	* other threads are waiting for writelock
636	+	*/
637	+	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
638	+	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
639	+	public void testReadHoldingWriteLock3(boolean fair) {
640	+	final PublicReentrantReadWriteLock lock =
641	+	new PublicReentrantReadWriteLock(fair);
642	+	lock.writeLock().lock();
643	+	lock.readLock().lock();
644	+	lock.readLock().unlock();
645	+
646	+	Thread t1 = newStartedThread(new CheckedRunnable() {
647	+	public void realRun() {
648	+	lock.writeLock().lock();
649	+	lock.writeLock().unlock();
650	+	}});
651	+	Thread t2 = newStartedThread(new CheckedRunnable() {
652	+	public void realRun() {
653	+	lock.writeLock().lock();
654	+	lock.writeLock().unlock();
655	+	}});
656	+
657	+	waitForQueuedThread(lock, t1);
658	+	waitForQueuedThread(lock, t2);
659	+	assertWriteLockedBy(lock, Thread.currentThread());
660	+	lock.readLock().lock();
661	+	lock.readLock().unlock();
662	+	assertWriteLockedBy(lock, Thread.currentThread());
663	+	lock.writeLock().unlock();
664	+	awaitTermination(t1);
665	+	awaitTermination(t2);
666	+	}
667	+
668	+	/**
669	+	* Write lock succeeds if write locked by current thread even if
670	+	* other threads are waiting for writelock
671	+	*/
672	+	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
673	+	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
674	+	public void testWriteHoldingWriteLock4(boolean fair) {
675	+	final PublicReentrantReadWriteLock lock =
676	+	new PublicReentrantReadWriteLock(fair);
677	+	lock.writeLock().lock();
678	+	lock.writeLock().lock();
679	+	lock.writeLock().unlock();
680	+
681	+	Thread t1 = newStartedThread(new CheckedRunnable() {
682	+	public void realRun() {
683	+	lock.writeLock().lock();
684	+	lock.writeLock().unlock();
685	+	}});
686	+	Thread t2 = newStartedThread(new CheckedRunnable() {
687	+	public void realRun() {
688	+	lock.writeLock().lock();
689	+	lock.writeLock().unlock();
690	+	}});
691	+
692	+	waitForQueuedThread(lock, t1);
693	+	waitForQueuedThread(lock, t2);
694	+	assertWriteLockedBy(lock, Thread.currentThread());
695	+	assertEquals(1, lock.getWriteHoldCount());
696	+	lock.writeLock().lock();
697	+	assertWriteLockedBy(lock, Thread.currentThread());
698	+	assertEquals(2, lock.getWriteHoldCount());
699	+	lock.writeLock().unlock();
700	+	assertWriteLockedBy(lock, Thread.currentThread());
701	+	assertEquals(1, lock.getWriteHoldCount());
702	+	lock.writeLock().unlock();
703	+	awaitTermination(t1);
704	+	awaitTermination(t2);
705	+	}
706
707		/**
708		* Read tryLock succeeds if readlocked but not writelocked
709		*/
710	<	public void testTryLockWhenReadLocked() {
711	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	<	lock.readLock().lock();
713	<	Thread t = new Thread(new Runnable() {
714	<	public void run() {
715	<	threadAssertTrue(lock.readLock().tryLock());
716	<	lock.readLock().unlock();
717	<	}
718	<	});
719	<	try {
394	<	t.start();
395	<	t.join();
396	<	lock.readLock().unlock();
397	<	} catch(Exception e){
398	<	unexpectedException();
399	<	}
400	<	}
710	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
711	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
712	>	public void testTryLockWhenReadLocked(boolean fair) {
713	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
714	>	lock.readLock().lock();
715	>	Thread t = newStartedThread(new CheckedRunnable() {
716	>	public void realRun() {
717	>	assertTrue(lock.readLock().tryLock());
718	>	lock.readLock().unlock();
719	>	}});
720
721	<
721	>	awaitTermination(t);
722	>	lock.readLock().unlock();
723	>	}
724
725		/**
726		* write tryLock fails when readlocked
727		*/
728	<	public void testWriteTryLockWhenReadLocked() {
729	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
730	<	lock.readLock().lock();
731	<	Thread t = new Thread(new Runnable() {
732	<	public void run() {
733	<	threadAssertFalse(lock.writeLock().tryLock());
734	<	}
735	<	});
736	<	try {
416	<	t.start();
417	<	t.join();
418	<	lock.readLock().unlock();
419	<	} catch(Exception e){
420	<	unexpectedException();
421	<	}
422	<	}
728	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
729	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
730	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
731	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
732	>	lock.readLock().lock();
733	>	Thread t = newStartedThread(new CheckedRunnable() {
734	>	public void realRun() {
735	>	assertFalse(lock.writeLock().tryLock());
736	>	}});
737
738	<
738	>	awaitTermination(t);
739	>	lock.readLock().unlock();
740	>	}
741
742		/**
743		* write timed tryLock times out if locked
744		*/
745	<	public void testWriteTryLock_Timeout() {
746	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
747	<	lock.writeLock().lock();
748	<	Thread t = new Thread(new Runnable() {
749	<	public void run() {
750	<	try {
751	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
752	<	} catch (Exception ex) {
753	<	threadUnexpectedException();
754	<	}
755	<	}
756	<	});
757	<	try {
758	<	t.start();
759	<	t.join();
760	<	lock.writeLock().unlock();
761	<	} catch(Exception e){
446	<	unexpectedException();
447	<	}
448	<	}
745	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
746	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
747	>	public void testWriteTryLock_Timeout(boolean fair) {
748	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
749	>	lock.writeLock().lock();
750	>	Thread t = newStartedThread(new CheckedRunnable() {
751	>	public void realRun() throws InterruptedException {
752	>	long startTime = System.nanoTime();
753	>	long timeoutMillis = 10;
754	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
755	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
756	>	}});
757	>
758	>	awaitTermination(t);
759	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
760	>	lock.writeLock().unlock();
761	>	}
762
763		/**
764		* read timed tryLock times out if write-locked
765		*/
766	<	public void testReadTryLock_Timeout() {
767	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
768	<	lock.writeLock().lock();
769	<	Thread t = new Thread(new Runnable() {
770	<	public void run() {
771	<	try {
772	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
773	<	} catch (Exception ex) {
774	<	threadUnexpectedException();
775	<	}
776	<	}
777	<	});
778	<	try {
779	<	t.start();
780	<	t.join();
781	<	lock.writeLock().unlock();
782	<	} catch(Exception e){
470	<	unexpectedException();
471	<	}
472	<	}
473	<
766	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
767	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
768	>	public void testReadTryLock_Timeout(boolean fair) {
769	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
770	>	lock.writeLock().lock();
771	>	Thread t = newStartedThread(new CheckedRunnable() {
772	>	public void realRun() throws InterruptedException {
773	>	long startTime = System.nanoTime();
774	>	long timeoutMillis = 10;
775	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
776	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
777	>	}});
778	>
779	>	awaitTermination(t);
780	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
781	>	lock.writeLock().unlock();
782	>	}
783
784		/**
785		* write lockInterruptibly succeeds if lock free else is interruptible
786		*/
787	<	public void testWriteLockInterruptibly() {
788	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
789	<	try {
790	<	lock.writeLock().lockInterruptibly();
791	<	} catch(Exception e) {
483	<	unexpectedException();
484	<	}
485	<	Thread t = new Thread(new Runnable() {
486	<	public void run() {
487	<	try {
488	<	lock.writeLock().lockInterruptibly();
489	<	threadShouldThrow();
490	<	}
491	<	catch(InterruptedException success) {
492	<	}
493	<	}
494	<	});
787	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
788	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
789	>	public void testWriteLockInterruptibly(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792		try {
793	<	t.start();
794	<	t.interrupt();
795	<	t.join();
499	<	lock.writeLock().unlock();
500	<	} catch(Exception e){
501	<	unexpectedException();
793	>	lock.writeLock().lockInterruptibly();
794	>	} catch (Throwable t) {
795	>	threadUnexpectedException(t);
796		}
797	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
798	+	public void realRun() throws InterruptedException {
799	+	lock.writeLock().lockInterruptibly();
800	+	}});
801	+
802	+	waitForQueuedThread(lock, t);
803	+	t.interrupt();
804	+	awaitTermination(t);
805	+	releaseWriteLock(lock);
806		}
807
808		/**
809	<	*  read lockInterruptibly succeeds if lock free else is interruptible
809	>	* read lockInterruptibly succeeds if lock free else is interruptible
810		*/
811	<	public void testReadLockInterruptibly() {
812	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
813	<	try {
814	<	lock.writeLock().lockInterruptibly();
815	<	} catch(Exception e) {
513	<	unexpectedException();
514	<	}
515	<	Thread t = new Thread(new Runnable() {
516	<	public void run() {
517	<	try {
518	<	lock.readLock().lockInterruptibly();
519	<	threadShouldThrow();
520	<	}
521	<	catch(InterruptedException success) {
522	<	}
523	<	}
524	<	});
811	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
812	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
813	>	public void testReadLockInterruptibly(boolean fair) {
814	>	final PublicReentrantReadWriteLock lock =
815	>	new PublicReentrantReadWriteLock(fair);
816		try {
817	<	t.start();
818	<	t.interrupt();
819	<	t.join();
820	<	lock.writeLock().unlock();
821	<	} catch(Exception e){
531	<	unexpectedException();
817	>	lock.readLock().lockInterruptibly();
818	>	lock.readLock().unlock();
819	>	lock.writeLock().lockInterruptibly();
820	>	} catch (Throwable t) {
821	>	threadUnexpectedException(t);
822		}
823	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
824	+	public void realRun() throws InterruptedException {
825	+	lock.readLock().lockInterruptibly();
826	+	}});
827	+
828	+	waitForQueuedThread(lock, t);
829	+	t.interrupt();
830	+	awaitTermination(t);
831	+	releaseWriteLock(lock);
832		}
833
834		/**
835		* Calling await without holding lock throws IllegalMonitorStateException
836		*/
837	<	public void testAwait_IllegalMonitor() {
838	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
837	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
838	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
839	>	public void testAwait_IMSE(boolean fair) {
840	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
841		final Condition c = lock.writeLock().newCondition();
842	+	long startTime = System.nanoTime();
843		try {
844	<	c.await();
845	<	shouldThrow();
846	<	}
847	<	catch (IllegalMonitorStateException success) {
848	<	}
849	<	catch (Exception ex) {
850	<	shouldThrow();
844	>	try {
845	>	c.await();
846	>	shouldThrow();
847	>	} catch (IllegalMonitorStateException success) {}
848	>	try {
849	>	c.await(LONG_DELAY_MS, MILLISECONDS);
850	>	shouldThrow();
851	>	} catch (IllegalMonitorStateException success) {}
852	>	try {
853	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
854	>	shouldThrow();
855	>	} catch (IllegalMonitorStateException success) {}
856	>	try {
857	>	c.awaitUninterruptibly();
858	>	shouldThrow();
859	>	} catch (IllegalMonitorStateException success) {}
860	>	} catch (Throwable t) {
861	>	threadUnexpectedException(t);
862		}
863	+	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
864		}
865
866		/**
867		* Calling signal without holding lock throws IllegalMonitorStateException
868		*/
869	<	public void testSignal_IllegalMonitor() {
870	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
870	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
871	>	public void testSignal_IMSE(boolean fair) {
872	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
873		final Condition c = lock.writeLock().newCondition();
874		try {
875		c.signal();
876		shouldThrow();
877	<	}
562	<	catch (IllegalMonitorStateException success) {
563	<	}
564	<	catch (Exception ex) {
565	<	unexpectedException();
566	<	}
877	>	} catch (IllegalMonitorStateException success) {}
878		}
879
880		/**
881	<	* awaitNanos without a signal times out
881	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
882		*/
883	<	public void testAwaitNanos_Timeout() {
884	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
883	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
884	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
885	>	public void testSignalAll_IMSE(boolean fair) {
886	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
887		final Condition c = lock.writeLock().newCondition();
888		try {
889	+	c.signalAll();
890	+	shouldThrow();
891	+	} catch (IllegalMonitorStateException success) {}
892	+	}
893	+
894	+	/**
895	+	* awaitNanos without a signal times out
896	+	*/
897	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
898	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
899	+	public void testAwaitNanos_Timeout(boolean fair) {
900	+	try {
901	+	final ReentrantReadWriteLock lock =
902	+	new ReentrantReadWriteLock(fair);
903	+	final Condition c = lock.writeLock().newCondition();
904		lock.writeLock().lock();
905	<	long t = c.awaitNanos(100);
906	<	assertTrue(t <= 0);
905	>	long startTime = System.nanoTime();
906	>	long timeoutMillis = 10;
907	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
908	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
909	>	assertTrue(nanosRemaining <= 0);
910	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
911		lock.writeLock().unlock();
912	<	}
913	<	catch (Exception ex) {
582	<	unexpectedException();
912	>	} catch (InterruptedException e) {
913	>	threadUnexpectedException(e);
914		}
915		}
916
586	–
917		/**
918	<	*  timed await without a signal times out
918	>	* timed await without a signal times out
919		*/
920	<	public void testAwait_Timeout() {
921	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
922	<	final Condition c = lock.writeLock().newCondition();
920	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
921	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
922	>	public void testAwait_Timeout(boolean fair) {
923		try {
924	+	final ReentrantReadWriteLock lock =
925	+	new ReentrantReadWriteLock(fair);
926	+	final Condition c = lock.writeLock().newCondition();
927		lock.writeLock().lock();
928	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
928	>	long startTime = System.nanoTime();
929	>	long timeoutMillis = 10;
930	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
931	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
932		lock.writeLock().unlock();
933	<	}
934	<	catch (Exception ex) {
599	<	unexpectedException();
933	>	} catch (InterruptedException e) {
934	>	threadUnexpectedException(e);
935		}
936		}
937
938		/**
939		* awaitUntil without a signal times out
940		*/
941	<	public void testAwaitUntil_Timeout() {
942	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
943	<	final Condition c = lock.writeLock().newCondition();
944	<	try {
941	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
942	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
943	>	public void testAwaitUntil_Timeout(boolean fair) {
944	>	try {
945	>	final ReentrantReadWriteLock lock =
946	>	new ReentrantReadWriteLock(fair);
947	>	final Condition c = lock.writeLock().newCondition();
948		lock.writeLock().lock();
949	+	long startTime = System.nanoTime();
950	+	long timeoutMillis = 10;
951		java.util.Date d = new java.util.Date();
952	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
952	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
953	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
954		lock.writeLock().unlock();
955	<	}
956	<	catch (Exception ex) {
616	<	unexpectedException();
955	>	} catch (InterruptedException e) {
956	>	threadUnexpectedException(e);
957		}
958		}
959
960		/**
961		* await returns when signalled
962		*/
963	<	public void testAwait() {
964	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
963	>	public void testAwait()      { testAwait(false); }
964	>	public void testAwait_fair() { testAwait(true); }
965	>	public void testAwait(boolean fair) {
966	>	final PublicReentrantReadWriteLock lock =
967	>	new PublicReentrantReadWriteLock(fair);
968		final Condition c = lock.writeLock().newCondition();
969	<	Thread t = new Thread(new Runnable() {
970	<	public void run() {
971	<	try {
972	<	lock.writeLock().lock();
973	<	c.await();
974	<	lock.writeLock().unlock();
975	<	}
976	<	catch(InterruptedException e) {
977	<	threadUnexpectedException();
978	<	}
979	<	}
980	<	});
981	<
982	<	try {
983	<	t.start();
984	<	Thread.sleep(SHORT_DELAY_MS);
985	<	lock.writeLock().lock();
643	<	c.signal();
644	<	lock.writeLock().unlock();
645	<	t.join(SHORT_DELAY_MS);
646	<	assertFalse(t.isAlive());
647	<	}
648	<	catch (Exception ex) {
649	<	unexpectedException();
650	<	}
969	>	final CountDownLatch locked = new CountDownLatch(1);
970	>	Thread t = newStartedThread(new CheckedRunnable() {
971	>	public void realRun() throws InterruptedException {
972	>	lock.writeLock().lock();
973	>	locked.countDown();
974	>	c.await();
975	>	lock.writeLock().unlock();
976	>	}});
977	>
978	>	await(locked);
979	>	lock.writeLock().lock();
980	>	assertHasWaiters(lock, c, t);
981	>	c.signal();
982	>	assertHasNoWaiters(lock, c);
983	>	assertTrue(t.isAlive());
984	>	lock.writeLock().unlock();
985	>	awaitTermination(t);
986		}
987
988		/**
989		* awaitUninterruptibly doesn't abort on interrupt
990		*/
991	<	public void testAwaitUninterruptibly() {
992	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
991	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
992	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
993	>	public void testAwaitUninterruptibly(boolean fair) {
994	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
995		final Condition c = lock.writeLock().newCondition();
996	<	Thread t = new Thread(new Runnable() {
997	<	public void run() {
998	<	lock.writeLock().lock();
999	<	c.awaitUninterruptibly();
1000	<	lock.writeLock().unlock();
1001	<	}
1002	<	});
1003	<
1004	<	try {
1005	<	t.start();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	t.interrupt();
1008	<	lock.writeLock().lock();
1009	<	c.signal();
1010	<	lock.writeLock().unlock();
1011	<	assert(t.isInterrupted());
1012	<	t.join(SHORT_DELAY_MS);
1013	<	assertFalse(t.isAlive());
1014	<	}
1015	<	catch (Exception ex) {
679	<	unexpectedException();
680	<	}
996	>	final CountDownLatch locked = new CountDownLatch(1);
997	>	Thread t = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() {
999	>	lock.writeLock().lock();
1000	>	locked.countDown();
1001	>	c.awaitUninterruptibly();
1002	>	assertTrue(Thread.interrupted());
1003	>	lock.writeLock().unlock();
1004	>	}});
1005	>
1006	>	await(locked);
1007	>	lock.writeLock().lock();
1008	>	lock.writeLock().unlock();
1009	>	t.interrupt();
1010	>	long timeoutMillis = 10;
1011	>	assertThreadJoinTimesOut(t, timeoutMillis);
1012	>	lock.writeLock().lock();
1013	>	c.signal();
1014	>	lock.writeLock().unlock();
1015	>	awaitTermination(t);
1016		}
1017
1018		/**
1019	<	* await is interruptible
1020	<	*/
1021	<	public void testAwait_Interrupt() {
1022	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1019	>	* await/awaitNanos/awaitUntil is interruptible
1020	>	*/
1021	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1022	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1023	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1024	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1025	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1026	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1027	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1028	>	final PublicReentrantReadWriteLock lock =
1029	>	new PublicReentrantReadWriteLock(fair);
1030		final Condition c = lock.writeLock().newCondition();
1031	<	Thread t = new Thread(new Runnable() {
1032	<	public void run() {
1033	<	try {
1034	<	lock.writeLock().lock();
1035	<	c.await();
1036	<	lock.writeLock().unlock();
1037	<	threadShouldThrow();
1038	<	}
1039	<	catch(InterruptedException success) {
1040	<	}
1041	<	}
1042	<	});
1043	<
1044	<	try {
1045	<	t.start();
1046	<	Thread.sleep(SHORT_DELAY_MS);
1047	<	t.interrupt();
1048	<	t.join(SHORT_DELAY_MS);
1049	<	assertFalse(t.isAlive());
1050	<	}
1051	<	catch (Exception ex) {
1052	<	unexpectedException();
711	<	}
1031	>	final CountDownLatch locked = new CountDownLatch(1);
1032	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	lock.writeLock().lock();
1035	>	assertWriteLockedBy(lock, Thread.currentThread());
1036	>	assertHasNoWaiters(lock, c);
1037	>	locked.countDown();
1038	>	try {
1039	>	await(c, awaitMethod);
1040	>	} finally {
1041	>	assertWriteLockedBy(lock, Thread.currentThread());
1042	>	assertHasNoWaiters(lock, c);
1043	>	lock.writeLock().unlock();
1044	>	assertFalse(Thread.interrupted());
1045	>	}
1046	>	}});
1047	>
1048	>	await(locked);
1049	>	assertHasWaiters(lock, c, t);
1050	>	t.interrupt();
1051	>	awaitTermination(t);
1052	>	assertNotWriteLocked(lock);
1053		}
1054
1055		/**
1056	<	* awaitNanos is interruptible
1056	>	* signalAll wakes up all threads
1057		*/
1058	<	public void testAwaitNanos_Interrupt() {
1059	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1058	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1059	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1060	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1061	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1062	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1063	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1064	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1065	>	final PublicReentrantReadWriteLock lock =
1066	>	new PublicReentrantReadWriteLock(fair);
1067		final Condition c = lock.writeLock().newCondition();
1068	<	Thread t = new Thread(new Runnable() {
1069	<	public void run() {
1070	<	try {
1071	<	lock.writeLock().lock();
1072	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1073	<	lock.writeLock().unlock();
1074	<	threadShouldThrow();
1075	<	}
1076	<	catch(InterruptedException success) {
1077	<	}
1078	<	}
1079	<	});
1080	<
1081	<	try {
1082	<	t.start();
1083	<	Thread.sleep(SHORT_DELAY_MS);
1084	<	t.interrupt();
1085	<	t.join(SHORT_DELAY_MS);
1086	<	assertFalse(t.isAlive());
1087	<	}
1088	<	catch (Exception ex) {
1089	<	unexpectedException();
742	<	}
1068	>	final CountDownLatch locked = new CountDownLatch(2);
1069	>	final Lock writeLock = lock.writeLock();
1070	>	class Awaiter extends CheckedRunnable {
1071	>	public void realRun() throws InterruptedException {
1072	>	writeLock.lock();
1073	>	locked.countDown();
1074	>	await(c, awaitMethod);
1075	>	writeLock.unlock();
1076	>	}
1077	>	}
1078	>
1079	>	Thread t1 = newStartedThread(new Awaiter());
1080	>	Thread t2 = newStartedThread(new Awaiter());
1081	>
1082	>	await(locked);
1083	>	writeLock.lock();
1084	>	assertHasWaiters(lock, c, t1, t2);
1085	>	c.signalAll();
1086	>	assertHasNoWaiters(lock, c);
1087	>	writeLock.unlock();
1088	>	awaitTermination(t1);
1089	>	awaitTermination(t2);
1090		}
1091
1092		/**
1093	<	* awaitUntil is interruptible
1094	<	*/
1095	<	public void testAwaitUntil_Interrupt() {
1096	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1093	>	* signal wakes up waiting threads in FIFO order.
1094	>	*/
1095	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1096	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1097	>	public void testSignalWakesFifo(boolean fair) {
1098	>	final PublicReentrantReadWriteLock lock =
1099	>	new PublicReentrantReadWriteLock(fair);
1100		final Condition c = lock.writeLock().newCondition();
1101	<	Thread t = new Thread(new Runnable() {
1102	<	public void run() {
1103	<	try {
1104	<	lock.writeLock().lock();
1105	<	java.util.Date d = new java.util.Date();
1106	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1107	<	lock.writeLock().unlock();
1108	<	threadShouldThrow();
1109	<	}
1110	<	catch(InterruptedException success) {
1111	<	}
1112	<	}
1113	<	});
1114	<
1115	<	try {
1116	<	t.start();
1117	<	Thread.sleep(SHORT_DELAY_MS);
1118	<	t.interrupt();
1119	<	t.join(SHORT_DELAY_MS);
1120	<	assertFalse(t.isAlive());
1121	<	}
1122	<	catch (Exception ex) {
1123	<	unexpectedException();
1124	<	}
1101	>	final CountDownLatch locked1 = new CountDownLatch(1);
1102	>	final CountDownLatch locked2 = new CountDownLatch(1);
1103	>	final Lock writeLock = lock.writeLock();
1104	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1105	>	public void realRun() throws InterruptedException {
1106	>	writeLock.lock();
1107	>	locked1.countDown();
1108	>	c.await();
1109	>	writeLock.unlock();
1110	>	}});
1111	>
1112	>	await(locked1);
1113	>
1114	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1115	>	public void realRun() throws InterruptedException {
1116	>	writeLock.lock();
1117	>	locked2.countDown();
1118	>	c.await();
1119	>	writeLock.unlock();
1120	>	}});
1121	>
1122	>	await(locked2);
1123	>
1124	>	writeLock.lock();
1125	>	assertHasWaiters(lock, c, t1, t2);
1126	>	assertFalse(lock.hasQueuedThreads());
1127	>	c.signal();
1128	>	assertHasWaiters(lock, c, t2);
1129	>	assertTrue(lock.hasQueuedThread(t1));
1130	>	assertFalse(lock.hasQueuedThread(t2));
1131	>	c.signal();
1132	>	assertHasNoWaiters(lock, c);
1133	>	assertTrue(lock.hasQueuedThread(t1));
1134	>	assertTrue(lock.hasQueuedThread(t2));
1135	>	writeLock.unlock();
1136	>	awaitTermination(t1);
1137	>	awaitTermination(t2);
1138		}
1139
1140		/**
1141	<	* signalAll wakes up all threads
1142	<	*/
1143	<	public void testSignalAll() {
1144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1141	>	* await after multiple reentrant locking preserves lock count
1142	>	*/
1143	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1144	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1145	>	public void testAwaitLockCount(boolean fair) {
1146	>	final PublicReentrantReadWriteLock lock =
1147	>	new PublicReentrantReadWriteLock(fair);
1148		final Condition c = lock.writeLock().newCondition();
1149	<	Thread t1 = new Thread(new Runnable() {
1150	<	public void run() {
1151	<	try {
1152	<	lock.writeLock().lock();
1153	<	c.await();
1154	<	lock.writeLock().unlock();
1155	<	}
1156	<	catch(InterruptedException e) {
1157	<	threadUnexpectedException();
1158	<	}
1159	<	}
1160	<	});
1161	<
1162	<	Thread t2 = new Thread(new Runnable() {
1163	<	public void run() {
1164	<	try {
1165	<	lock.writeLock().lock();
1166	<	c.await();
1167	<	lock.writeLock().unlock();
1168	<	}
1169	<	catch(InterruptedException e) {
1170	<	threadUnexpectedException();
1171	<	}
1172	<	}
1173	<	});
1174	<
1175	<	try {
1176	<	t1.start();
1177	<	t2.start();
1178	<	Thread.sleep(SHORT_DELAY_MS);
1179	<	lock.writeLock().lock();
1180	<	c.signalAll();
1181	<	lock.writeLock().unlock();
1182	<	t1.join(SHORT_DELAY_MS);
1183	<	t2.join(SHORT_DELAY_MS);
818	<	assertFalse(t1.isAlive());
819	<	assertFalse(t2.isAlive());
820	<	}
821	<	catch (Exception ex) {
822	<	unexpectedException();
823	<	}
1149	>	final CountDownLatch locked = new CountDownLatch(2);
1150	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1151	>	public void realRun() throws InterruptedException {
1152	>	lock.writeLock().lock();
1153	>	assertWriteLockedBy(lock, Thread.currentThread());
1154	>	assertEquals(1, lock.writeLock().getHoldCount());
1155	>	locked.countDown();
1156	>	c.await();
1157	>	assertWriteLockedBy(lock, Thread.currentThread());
1158	>	assertEquals(1, lock.writeLock().getHoldCount());
1159	>	lock.writeLock().unlock();
1160	>	}});
1161	>
1162	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1163	>	public void realRun() throws InterruptedException {
1164	>	lock.writeLock().lock();
1165	>	lock.writeLock().lock();
1166	>	assertWriteLockedBy(lock, Thread.currentThread());
1167	>	assertEquals(2, lock.writeLock().getHoldCount());
1168	>	locked.countDown();
1169	>	c.await();
1170	>	assertWriteLockedBy(lock, Thread.currentThread());
1171	>	assertEquals(2, lock.writeLock().getHoldCount());
1172	>	lock.writeLock().unlock();
1173	>	lock.writeLock().unlock();
1174	>	}});
1175	>
1176	>	await(locked);
1177	>	lock.writeLock().lock();
1178	>	assertHasWaiters(lock, c, t1, t2);
1179	>	c.signalAll();
1180	>	assertHasNoWaiters(lock, c);
1181	>	lock.writeLock().unlock();
1182	>	awaitTermination(t1);
1183	>	awaitTermination(t2);
1184		}
1185
1186		/**
1187		* A serialized lock deserializes as unlocked
1188		*/
1189	<	public void testSerialization() {
1190	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1191	<	l.readLock().lock();
1192	<	l.readLock().unlock();
1193	<
1194	<	try {
1195	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1196	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1197	<	out.writeObject(l);
1198	<	out.close();
1199	<
1200	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1201	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1202	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1203	<	r.readLock().lock();
1204	<	r.readLock().unlock();
1205	<	} catch(Exception e){
1206	<	e.printStackTrace();
1207	<	unexpectedException();
848	<	}
1189	>	public void testSerialization()      { testSerialization(false); }
1190	>	public void testSerialization_fair() { testSerialization(true); }
1191	>	public void testSerialization(boolean fair) {
1192	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1193	>	lock.writeLock().lock();
1194	>	lock.readLock().lock();
1195	>
1196	>	ReentrantReadWriteLock clone = serialClone(lock);
1197	>	assertEquals(lock.isFair(), clone.isFair());
1198	>	assertTrue(lock.isWriteLocked());
1199	>	assertFalse(clone.isWriteLocked());
1200	>	assertEquals(1, lock.getReadLockCount());
1201	>	assertEquals(0, clone.getReadLockCount());
1202	>	clone.writeLock().lock();
1203	>	clone.readLock().lock();
1204	>	assertTrue(clone.isWriteLocked());
1205	>	assertEquals(1, clone.getReadLockCount());
1206	>	clone.readLock().unlock();
1207	>	clone.writeLock().unlock();
1208		}
1209
1210		/**
1211		* hasQueuedThreads reports whether there are waiting threads
1212		*/
1213	<	public void testhasQueuedThreads() {
1214	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1213	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1214	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1215	>	public void testHasQueuedThreads(boolean fair) {
1216	>	final PublicReentrantReadWriteLock lock =
1217	>	new PublicReentrantReadWriteLock(fair);
1218		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1219		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1220	+	assertFalse(lock.hasQueuedThreads());
1221	+	lock.writeLock().lock();
1222	+	assertFalse(lock.hasQueuedThreads());
1223	+	t1.start();
1224	+	waitForQueuedThread(lock, t1);
1225	+	assertTrue(lock.hasQueuedThreads());
1226	+	t2.start();
1227	+	waitForQueuedThread(lock, t2);
1228	+	assertTrue(lock.hasQueuedThreads());
1229	+	t1.interrupt();
1230	+	awaitTermination(t1);
1231	+	assertTrue(lock.hasQueuedThreads());
1232	+	lock.writeLock().unlock();
1233	+	awaitTermination(t2);
1234	+	assertFalse(lock.hasQueuedThreads());
1235	+	}
1236	+
1237	+	/**
1238	+	* hasQueuedThread(null) throws NPE
1239	+	*/
1240	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1241	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1242	+	public void testHasQueuedThreadNPE(boolean fair) {
1243	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1244		try {
1245	<	assertFalse(lock.hasQueuedThreads());
1246	<	lock.writeLock().lock();
1247	<	t1.start();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1249	<	assertTrue(lock.hasQueuedThreads());
1250	<	t2.start();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1252	<	assertTrue(lock.hasQueuedThreads());
1253	<	t1.interrupt();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1255	<	assertTrue(lock.hasQueuedThreads());
1256	<	lock.writeLock().unlock();
1257	<	Thread.sleep(SHORT_DELAY_MS);
1258	<	assertFalse(lock.hasQueuedThreads());
1259	<	t1.join();
1260	<	t2.join();
1261	<	} catch(Exception e){
1262	<	unexpectedException();
1263	<	}
1264	<	}
1245	>	lock.hasQueuedThread(null);
1246	>	shouldThrow();
1247	>	} catch (NullPointerException success) {}
1248	>	}
1249	>
1250	>	/**
1251	>	* hasQueuedThread reports whether a thread is queued.
1252	>	*/
1253	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1254	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1255	>	public void testHasQueuedThread(boolean fair) {
1256	>	final PublicReentrantReadWriteLock lock =
1257	>	new PublicReentrantReadWriteLock(fair);
1258	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1259	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1260	>	assertFalse(lock.hasQueuedThread(t1));
1261	>	assertFalse(lock.hasQueuedThread(t2));
1262	>	lock.writeLock().lock();
1263	>	t1.start();
1264	>	waitForQueuedThread(lock, t1);
1265	>	assertTrue(lock.hasQueuedThread(t1));
1266	>	assertFalse(lock.hasQueuedThread(t2));
1267	>	t2.start();
1268	>	waitForQueuedThread(lock, t2);
1269	>	assertTrue(lock.hasQueuedThread(t1));
1270	>	assertTrue(lock.hasQueuedThread(t2));
1271	>	t1.interrupt();
1272	>	awaitTermination(t1);
1273	>	assertFalse(lock.hasQueuedThread(t1));
1274	>	assertTrue(lock.hasQueuedThread(t2));
1275	>	lock.writeLock().unlock();
1276	>	awaitTermination(t2);
1277	>	assertFalse(lock.hasQueuedThread(t1));
1278	>	assertFalse(lock.hasQueuedThread(t2));
1279	>	}
1280
1281		/**
1282		* getQueueLength reports number of waiting threads
1283		*/
1284	<	public void testGetQueueLength() {
1285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1284	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1285	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1286	>	public void testGetQueueLength(boolean fair) {
1287	>	final PublicReentrantReadWriteLock lock =
1288	>	new PublicReentrantReadWriteLock(fair);
1289		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1290		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1291	<	try {
1292	<	assertEquals(0, lock.getQueueLength());
1293	<	lock.writeLock().lock();
1294	<	t1.start();
1295	<	Thread.sleep(SHORT_DELAY_MS);
1296	<	assertEquals(1, lock.getQueueLength());
1297	<	t2.start();
1298	<	Thread.sleep(SHORT_DELAY_MS);
1299	<	assertEquals(2, lock.getQueueLength());
1300	<	t1.interrupt();
1301	<	Thread.sleep(SHORT_DELAY_MS);
1302	<	assertEquals(1, lock.getQueueLength());
1303	<	lock.writeLock().unlock();
1304	<	Thread.sleep(SHORT_DELAY_MS);
1305	<	assertEquals(0, lock.getQueueLength());
902	<	t1.join();
903	<	t2.join();
904	<	} catch(Exception e){
905	<	unexpectedException();
906	<	}
907	<	}
1291	>	assertEquals(0, lock.getQueueLength());
1292	>	lock.writeLock().lock();
1293	>	t1.start();
1294	>	waitForQueuedThread(lock, t1);
1295	>	assertEquals(1, lock.getQueueLength());
1296	>	t2.start();
1297	>	waitForQueuedThread(lock, t2);
1298	>	assertEquals(2, lock.getQueueLength());
1299	>	t1.interrupt();
1300	>	awaitTermination(t1);
1301	>	assertEquals(1, lock.getQueueLength());
1302	>	lock.writeLock().unlock();
1303	>	awaitTermination(t2);
1304	>	assertEquals(0, lock.getQueueLength());
1305	>	}
1306
1307		/**
1308		* getQueuedThreads includes waiting threads
1309		*/
1310	<	public void testGetQueuedThreads() {
1311	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1310	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1311	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1312	>	public void testGetQueuedThreads(boolean fair) {
1313	>	final PublicReentrantReadWriteLock lock =
1314	>	new PublicReentrantReadWriteLock(fair);
1315		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1316		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1317	<	try {
1318	<	assertTrue(lock.getQueuedThreads().isEmpty());
1319	<	lock.writeLock().lock();
1320	<	assertTrue(lock.getQueuedThreads().isEmpty());
1321	<	t1.start();
1322	<	Thread.sleep(SHORT_DELAY_MS);
1323	<	assertTrue(lock.getQueuedThreads().contains(t1));
1324	<	t2.start();
1325	<	Thread.sleep(SHORT_DELAY_MS);
1326	<	assertTrue(lock.getQueuedThreads().contains(t1));
1327	<	assertTrue(lock.getQueuedThreads().contains(t2));
1328	<	t1.interrupt();
1329	<	Thread.sleep(SHORT_DELAY_MS);
1330	<	assertFalse(lock.getQueuedThreads().contains(t1));
1331	<	assertTrue(lock.getQueuedThreads().contains(t2));
1332	<	lock.writeLock().unlock();
1333	<	Thread.sleep(SHORT_DELAY_MS);
1334	<	assertTrue(lock.getQueuedThreads().isEmpty());
1335	<	t1.join();
1336	<	t2.join();
1337	<	} catch(Exception e){
937	<	unexpectedException();
938	<	}
939	<	}
1317	>	assertTrue(lock.getQueuedThreads().isEmpty());
1318	>	lock.writeLock().lock();
1319	>	assertTrue(lock.getQueuedThreads().isEmpty());
1320	>	t1.start();
1321	>	waitForQueuedThread(lock, t1);
1322	>	assertEquals(1, lock.getQueuedThreads().size());
1323	>	assertTrue(lock.getQueuedThreads().contains(t1));
1324	>	t2.start();
1325	>	waitForQueuedThread(lock, t2);
1326	>	assertEquals(2, lock.getQueuedThreads().size());
1327	>	assertTrue(lock.getQueuedThreads().contains(t1));
1328	>	assertTrue(lock.getQueuedThreads().contains(t2));
1329	>	t1.interrupt();
1330	>	awaitTermination(t1);
1331	>	assertFalse(lock.getQueuedThreads().contains(t1));
1332	>	assertTrue(lock.getQueuedThreads().contains(t2));
1333	>	assertEquals(1, lock.getQueuedThreads().size());
1334	>	lock.writeLock().unlock();
1335	>	awaitTermination(t2);
1336	>	assertTrue(lock.getQueuedThreads().isEmpty());
1337	>	}
1338
1339		/**
1340		* hasWaiters throws NPE if null
1341		*/
1342	<	public void testHasWaitersNPE() {
1343	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1342	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1343	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1344	>	public void testHasWaitersNPE(boolean fair) {
1345	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1346		try {
1347		lock.hasWaiters(null);
1348		shouldThrow();
1349	<	} catch (NullPointerException success) {
950	<	} catch (Exception ex) {
951	<	unexpectedException();
952	<	}
1349	>	} catch (NullPointerException success) {}
1350		}
1351
1352		/**
1353		* getWaitQueueLength throws NPE if null
1354		*/
1355	<	public void testGetWaitQueueLengthNPE() {
1356	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1355	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1356	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1357	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1358	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1359		try {
1360		lock.getWaitQueueLength(null);
1361		shouldThrow();
1362	<	} catch (NullPointerException success) {
964	<	} catch (Exception ex) {
965	<	unexpectedException();
966	<	}
1362	>	} catch (NullPointerException success) {}
1363		}
1364
969	–
1365		/**
1366		* getWaitingThreads throws NPE if null
1367		*/
1368	<	public void testGetWaitingThreadsNPE() {
1369	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1368	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1369	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1370	>	public void testGetWaitingThreadsNPE(boolean fair) {
1371	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1372		try {
1373		lock.getWaitingThreads(null);
1374		shouldThrow();
1375	<	} catch (NullPointerException success) {
979	<	} catch (Exception ex) {
980	<	unexpectedException();
981	<	}
1375	>	} catch (NullPointerException success) {}
1376		}
1377
1378		/**
1379	<	* hasWaiters throws IAE if not owned
1379	>	* hasWaiters throws IllegalArgumentException if not owned
1380		*/
1381	<	public void testHasWaitersIAE() {
1382	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1383	<	final Condition c = (lock.writeLock().newCondition());
1384	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1381	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1382	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1383	>	public void testHasWaitersIAE(boolean fair) {
1384	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1385	>	final Condition c = lock.writeLock().newCondition();
1386	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1387		try {
1388		lock2.hasWaiters(c);
1389		shouldThrow();
1390	<	} catch (IllegalArgumentException success) {
995	<	} catch (Exception ex) {
996	<	unexpectedException();
997	<	}
1390	>	} catch (IllegalArgumentException success) {}
1391		}
1392
1393		/**
1394	<	* hasWaiters throws IMSE if not locked
1394	>	* hasWaiters throws IllegalMonitorStateException if not locked
1395		*/
1396	<	public void testHasWaitersIMSE() {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	<	final Condition c = (lock.writeLock().newCondition());
1396	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1397	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1398	>	public void testHasWaitersIMSE(boolean fair) {
1399	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1400	>	final Condition c = lock.writeLock().newCondition();
1401		try {
1402		lock.hasWaiters(c);
1403		shouldThrow();
1404	<	} catch (IllegalMonitorStateException success) {
1010	<	} catch (Exception ex) {
1011	<	unexpectedException();
1012	<	}
1404	>	} catch (IllegalMonitorStateException success) {}
1405		}
1406
1015	–
1407		/**
1408	<	* getWaitQueueLength throws IAE if not owned
1408	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1409		*/
1410	<	public void testGetWaitQueueLengthIAE() {
1411	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1412	<	final Condition c = (lock.writeLock().newCondition());
1413	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1410	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1411	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1412	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1413	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1414	>	final Condition c = lock.writeLock().newCondition();
1415	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1416		try {
1417		lock2.getWaitQueueLength(c);
1418		shouldThrow();
1419	<	} catch (IllegalArgumentException success) {
1027	<	} catch (Exception ex) {
1028	<	unexpectedException();
1029	<	}
1419	>	} catch (IllegalArgumentException success) {}
1420		}
1421
1422		/**
1423	<	* getWaitQueueLength throws IMSE if not locked
1423	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1424		*/
1425	<	public void testGetWaitQueueLengthIMSE() {
1426	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1427	<	final Condition c = (lock.writeLock().newCondition());
1425	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1426	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1427	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1428	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1429	>	final Condition c = lock.writeLock().newCondition();
1430		try {
1431		lock.getWaitQueueLength(c);
1432		shouldThrow();
1433	<	} catch (IllegalMonitorStateException success) {
1042	<	} catch (Exception ex) {
1043	<	unexpectedException();
1044	<	}
1433	>	} catch (IllegalMonitorStateException success) {}
1434		}
1435
1047	–
1436		/**
1437	<	* getWaitingThreads throws IAE if not owned
1437	>	* getWaitingThreads throws IllegalArgumentException if not owned
1438		*/
1439	<	public void testGetWaitingThreadsIAE() {
1440	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1441	<	final Condition c = (lock.writeLock().newCondition());
1442	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1439	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1440	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1441	>	public void testGetWaitingThreadsIAE(boolean fair) {
1442	>	final PublicReentrantReadWriteLock lock =
1443	>	new PublicReentrantReadWriteLock(fair);
1444	>	final Condition c = lock.writeLock().newCondition();
1445	>	final PublicReentrantReadWriteLock lock2 =
1446	>	new PublicReentrantReadWriteLock(fair);
1447		try {
1448		lock2.getWaitingThreads(c);
1449		shouldThrow();
1450	<	} catch (IllegalArgumentException success) {
1059	<	} catch (Exception ex) {
1060	<	unexpectedException();
1061	<	}
1450	>	} catch (IllegalArgumentException success) {}
1451		}
1452
1453		/**
1454	<	* getWaitingThreads throws IMSE if not locked
1454	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1455		*/
1456	<	public void testGetWaitingThreadsIMSE() {
1457	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1458	<	final Condition c = (lock.writeLock().newCondition());
1456	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1457	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1458	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1459	>	final PublicReentrantReadWriteLock lock =
1460	>	new PublicReentrantReadWriteLock(fair);
1461	>	final Condition c = lock.writeLock().newCondition();
1462		try {
1463		lock.getWaitingThreads(c);
1464		shouldThrow();
1465	<	} catch (IllegalMonitorStateException success) {
1074	<	} catch (Exception ex) {
1075	<	unexpectedException();
1076	<	}
1465	>	} catch (IllegalMonitorStateException success) {}
1466		}
1467
1079	–
1468		/**
1469		* hasWaiters returns true when a thread is waiting, else false
1470		*/
1471	<	public void testHasWaiters() {
1472	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1473	<	final Condition c = (lock.writeLock().newCondition());
1474	<	Thread t = new Thread(new Runnable() {
1475	<	public void run() {
1476	<	try {
1477	<	lock.writeLock().lock();
1478	<	threadAssertFalse(lock.hasWaiters(c));
1479	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1480	<	c.await();
1481	<	lock.writeLock().unlock();
1482	<	}
1483	<	catch(InterruptedException e) {
1484	<	threadUnexpectedException();
1485	<	}
1486	<	}
1487	<	});
1488	<
1489	<	try {
1490	<	t.start();
1491	<	Thread.sleep(SHORT_DELAY_MS);
1492	<	lock.writeLock().lock();
1493	<	assertTrue(lock.hasWaiters(c));
1494	<	assertEquals(1, lock.getWaitQueueLength(c));
1495	<	c.signal();
1496	<	lock.writeLock().unlock();
1497	<	Thread.sleep(SHORT_DELAY_MS);
1498	<	lock.writeLock().lock();
1499	<	assertFalse(lock.hasWaiters(c));
1112	<	assertEquals(0, lock.getWaitQueueLength(c));
1113	<	lock.writeLock().unlock();
1114	<	t.join(SHORT_DELAY_MS);
1115	<	assertFalse(t.isAlive());
1116	<	}
1117	<	catch (Exception ex) {
1118	<	unexpectedException();
1119	<	}
1471	>	public void testHasWaiters()      { testHasWaiters(false); }
1472	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1473	>	public void testHasWaiters(boolean fair) {
1474	>	final PublicReentrantReadWriteLock lock =
1475	>	new PublicReentrantReadWriteLock(fair);
1476	>	final Condition c = lock.writeLock().newCondition();
1477	>	final CountDownLatch locked = new CountDownLatch(1);
1478	>	Thread t = newStartedThread(new CheckedRunnable() {
1479	>	public void realRun() throws InterruptedException {
1480	>	lock.writeLock().lock();
1481	>	assertHasNoWaiters(lock, c);
1482	>	assertFalse(lock.hasWaiters(c));
1483	>	locked.countDown();
1484	>	c.await();
1485	>	assertHasNoWaiters(lock, c);
1486	>	assertFalse(lock.hasWaiters(c));
1487	>	lock.writeLock().unlock();
1488	>	}});
1489	>
1490	>	await(locked);
1491	>	lock.writeLock().lock();
1492	>	assertHasWaiters(lock, c, t);
1493	>	assertTrue(lock.hasWaiters(c));
1494	>	c.signal();
1495	>	assertHasNoWaiters(lock, c);
1496	>	assertFalse(lock.hasWaiters(c));
1497	>	lock.writeLock().unlock();
1498	>	awaitTermination(t);
1499	>	assertHasNoWaiters(lock, c);
1500		}
1501
1502		/**
1503		* getWaitQueueLength returns number of waiting threads
1504		*/
1505	<	public void testGetWaitQueueLength() {
1506	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1507	<	final Condition c = (lock.writeLock().newCondition());
1508	<	Thread t = new Thread(new Runnable() {
1509	<	public void run() {
1510	<	try {
1511	<	lock.writeLock().lock();
1512	<	threadAssertFalse(lock.hasWaiters(c));
1513	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1514	<	c.await();
1515	<	lock.writeLock().unlock();
1516	<	}
1517	<	catch(InterruptedException e) {
1518	<	threadUnexpectedException();
1519	<	}
1520	<	}
1521	<	});
1522	<
1523	<	try {
1524	<	t.start();
1525	<	Thread.sleep(SHORT_DELAY_MS);
1526	<	lock.writeLock().lock();
1527	<	assertTrue(lock.hasWaiters(c));
1528	<	assertEquals(1, lock.getWaitQueueLength(c));
1529	<	c.signal();
1150	<	lock.writeLock().unlock();
1151	<	Thread.sleep(SHORT_DELAY_MS);
1152	<	lock.writeLock().lock();
1153	<	assertFalse(lock.hasWaiters(c));
1154	<	assertEquals(0, lock.getWaitQueueLength(c));
1155	<	lock.writeLock().unlock();
1156	<	t.join(SHORT_DELAY_MS);
1157	<	assertFalse(t.isAlive());
1158	<	}
1159	<	catch (Exception ex) {
1160	<	unexpectedException();
1161	<	}
1505	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1506	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1507	>	public void testGetWaitQueueLength(boolean fair) {
1508	>	final PublicReentrantReadWriteLock lock =
1509	>	new PublicReentrantReadWriteLock(fair);
1510	>	final Condition c = lock.writeLock().newCondition();
1511	>	final CountDownLatch locked = new CountDownLatch(1);
1512	>	Thread t = newStartedThread(new CheckedRunnable() {
1513	>	public void realRun() throws InterruptedException {
1514	>	lock.writeLock().lock();
1515	>	assertEquals(0, lock.getWaitQueueLength(c));
1516	>	locked.countDown();
1517	>	c.await();
1518	>	lock.writeLock().unlock();
1519	>	}});
1520	>
1521	>	await(locked);
1522	>	lock.writeLock().lock();
1523	>	assertHasWaiters(lock, c, t);
1524	>	assertEquals(1, lock.getWaitQueueLength(c));
1525	>	c.signal();
1526	>	assertHasNoWaiters(lock, c);
1527	>	assertEquals(0, lock.getWaitQueueLength(c));
1528	>	lock.writeLock().unlock();
1529	>	awaitTermination(t);
1530		}
1531
1164	–
1532		/**
1533		* getWaitingThreads returns only and all waiting threads
1534		*/
1535	<	public void testGetWaitingThreads() {
1536	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1535	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1536	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1537	>	public void testGetWaitingThreads(boolean fair) {
1538	>	final PublicReentrantReadWriteLock lock =
1539	>	new PublicReentrantReadWriteLock(fair);
1540		final Condition c = lock.writeLock().newCondition();
1541	<	Thread t1 = new Thread(new Runnable() {
1542	<	public void run() {
1543	<	try {
1544	<	lock.writeLock().lock();
1545	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1546	<	c.await();
1547	<	lock.writeLock().unlock();
1548	<	}
1549	<	catch(InterruptedException e) {
1550	<	threadUnexpectedException();
1551	<	}
1552	<	}
1553	<	});
1554	<
1555	<	Thread t2 = new Thread(new Runnable() {
1556	<	public void run() {
1557	<	try {
1558	<	lock.writeLock().lock();
1559	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1560	<	c.await();
1561	<	lock.writeLock().unlock();
1562	<	}
1563	<	catch(InterruptedException e) {
1564	<	threadUnexpectedException();
1565	<	}
1566	<	}
1567	<	});
1568	<
1569	<	try {
1570	<	lock.writeLock().lock();
1571	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1572	<	lock.writeLock().unlock();
1573	<	t1.start();
1574	<	Thread.sleep(SHORT_DELAY_MS);
1575	<	t2.start();
1576	<	Thread.sleep(SHORT_DELAY_MS);
1577	<	lock.writeLock().lock();
1578	<	assertTrue(lock.hasWaiters(c));
1579	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1580	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1581	<	c.signalAll();
1582	<	lock.writeLock().unlock();
1583	<	Thread.sleep(SHORT_DELAY_MS);
1584	<	lock.writeLock().lock();
1585	<	assertFalse(lock.hasWaiters(c));
1586	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1587	<	lock.writeLock().unlock();
1588	<	t1.join(SHORT_DELAY_MS);
1589	<	t2.join(SHORT_DELAY_MS);
1590	<	assertFalse(t1.isAlive());
1591	<	assertFalse(t2.isAlive());
1592	<	}
1593	<	catch (Exception ex) {
1594	<	unexpectedException();
1595	<	}
1541	>	final CountDownLatch locked1 = new CountDownLatch(1);
1542	>	final CountDownLatch locked2 = new CountDownLatch(1);
1543	>	Thread t1 = new Thread(new CheckedRunnable() {
1544	>	public void realRun() throws InterruptedException {
1545	>	lock.writeLock().lock();
1546	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1547	>	locked1.countDown();
1548	>	c.await();
1549	>	lock.writeLock().unlock();
1550	>	}});
1551	>
1552	>	Thread t2 = new Thread(new CheckedRunnable() {
1553	>	public void realRun() throws InterruptedException {
1554	>	lock.writeLock().lock();
1555	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1556	>	locked2.countDown();
1557	>	c.await();
1558	>	lock.writeLock().unlock();
1559	>	}});
1560	>
1561	>	lock.writeLock().lock();
1562	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1563	>	lock.writeLock().unlock();
1564	>
1565	>	t1.start();
1566	>	await(locked1);
1567	>	t2.start();
1568	>	await(locked2);
1569	>
1570	>	lock.writeLock().lock();
1571	>	assertTrue(lock.hasWaiters(c));
1572	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1573	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1574	>	assertEquals(2, lock.getWaitingThreads(c).size());
1575	>	c.signalAll();
1576	>	assertHasNoWaiters(lock, c);
1577	>	lock.writeLock().unlock();
1578	>
1579	>	awaitTermination(t1);
1580	>	awaitTermination(t2);
1581	>
1582	>	assertHasNoWaiters(lock, c);
1583	>	}
1584	>
1585	>	/**
1586	>	* toString indicates current lock state
1587	>	*/
1588	>	public void testToString()      { testToString(false); }
1589	>	public void testToString_fair() { testToString(true); }
1590	>	public void testToString(boolean fair) {
1591	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1592	>	String us = lock.toString();
1593	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1594	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1595	>	lock.writeLock().lock();
1596	>	String ws = lock.toString();
1597	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1598	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1599	>	lock.writeLock().unlock();
1600	>	lock.readLock().lock();
1601	>	lock.readLock().lock();
1602	>	String rs = lock.toString();
1603	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1604	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1605	>	}
1606	>
1607	>	/**
1608	>	* readLock.toString indicates current lock state
1609	>	*/
1610	>	public void testReadLockToString()      { testReadLockToString(false); }
1611	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1612	>	public void testReadLockToString(boolean fair) {
1613	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1614	>	String us = lock.readLock().toString();
1615	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1616	>	lock.readLock().lock();
1617	>	lock.readLock().lock();
1618	>	String rs = lock.readLock().toString();
1619	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1620	>	}
1621	>
1622	>	/**
1623	>	* writeLock.toString indicates current lock state
1624	>	*/
1625	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1626	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1627	>	public void testWriteLockToString(boolean fair) {
1628	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1629	>	String us = lock.writeLock().toString();
1630	>	assertTrue(us.indexOf("Unlocked") >= 0);
1631	>	lock.writeLock().lock();
1632	>	String ls = lock.writeLock().toString();
1633	>	assertTrue(ls.indexOf("Locked") >= 0);
1634		}
1635
1636		}

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