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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.33 by jsr166, Tue Nov 17 14:33:55 2009 UTC vs.
Revision 1.63 by jsr166, Sat May 21 06:24:33 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
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		/**
#	Line 31 | Line 33 | public class ReentrantReadWriteLockTest
33		}
34		}
35
34	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
#	Line 49 | Line 50 | public class ReentrantReadWriteLockTest
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		}
#	Line 58 | Line 63 | public class ReentrantReadWriteLockTest
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);
69	<	assertTrue(r2.isFair());
70	<	assertFalse(r2.isWriteLocked());
71	<	assertEquals(0, r2.getReadLockCount());
72	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
73	<	assertFalse(r3.isFair());
74	<	assertFalse(r3.isWriteLocked());
75	<	assertEquals(0, r3.getReadLockCount());
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedByMoi(lock);
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* write-locking and read-locking an unlocked lock succeed
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78	>	*/
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new 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	>	* Checks that lock is write-locked by the given thread.
104	>	*/
105	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
106	>	assertTrue(lock.isWriteLocked());
107	>	assertSame(t, lock.getOwner());
108	>	assertEquals(t == Thread.currentThread(),
109	>	lock.isWriteLockedByCurrentThread());
110	>	assertEquals(t == Thread.currentThread(),
111	>	lock.writeLock().isHeldByCurrentThread());
112	>	assertEquals(t == Thread.currentThread(),
113	>	lock.getWriteHoldCount() > 0);
114	>	assertEquals(t == Thread.currentThread(),
115	>	lock.writeLock().getHoldCount() > 0);
116	>	assertEquals(0, lock.getReadLockCount());
117	>	}
118	>
119	>	/**
120	>	* Checks that lock is write-locked by the current thread.
121	>	*/
122	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
123	>	assertWriteLockedBy(lock, Thread.currentThread());
124	>	}
125	>
126	>	/**
127	>	* 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	<	public void testLock() {
137	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
138	<	rl.writeLock().lock();
139	<	assertTrue(rl.isWriteLocked());
140	<	assertTrue(rl.isWriteLockedByCurrentThread());
141	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
142	<	assertEquals(0, rl.getReadLockCount());
143	<	rl.writeLock().unlock();
144	<	assertFalse(rl.isWriteLocked());
145	<	assertFalse(rl.isWriteLockedByCurrentThread());
91	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
92	<	assertEquals(0, rl.getReadLockCount());
93	<	rl.readLock().lock();
94	<	assertFalse(rl.isWriteLocked());
95	<	assertFalse(rl.isWriteLockedByCurrentThread());
96	<	assertEquals(1, rl.getReadLockCount());
97	<	rl.readLock().unlock();
98	<	assertFalse(rl.isWriteLocked());
99	<	assertFalse(rl.isWriteLockedByCurrentThread());
100	<	assertEquals(0, rl.getReadLockCount());
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	<	* locking an unlocked fair lock succeeds
152	<	*/
153	<	public void testFairLock() {
154	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
155	<	rl.writeLock().lock();
156	<	assertTrue(rl.isWriteLocked());
157	<	assertTrue(rl.isWriteLockedByCurrentThread());
158	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
159	<	assertEquals(0, rl.getReadLockCount());
160	<	rl.writeLock().unlock();
161	<	assertFalse(rl.isWriteLocked());
162	<	assertFalse(rl.isWriteLockedByCurrentThread());
163	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
164	<	assertEquals(0, rl.getReadLockCount());
165	<	rl.readLock().lock();
166	<	assertFalse(rl.isWriteLocked());
167	<	assertFalse(rl.isWriteLockedByCurrentThread());
168	<	assertEquals(1, rl.getReadLockCount());
169	<	rl.readLock().unlock();
170	<	assertFalse(rl.isWriteLocked());
171	<	assertFalse(rl.isWriteLockedByCurrentThread());
172	<	assertEquals(0, rl.getReadLockCount());
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	>	* 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() {
221	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
222	<	for (int i = 1; i <= SIZE; i++) {
223	<	lock.writeLock().lock();
224	<	assertEquals(i,lock.getWriteHoldCount());
225	<	}
226	<	for (int i = SIZE; i > 0; i--) {
227	<	lock.writeLock().unlock();
228	<	assertEquals(i-1,lock.getWriteHoldCount());
229	<	}
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	>	assertEquals(i-1,lock.getWriteHoldCount());
231	>	}
232		}
233
234		/**
235	<	* WriteLock.getHoldCount returns number of recursive holds
236	<	*/
237	<	public void testGetHoldCount() {
238	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
239	<	for (int i = 1; i <= SIZE; i++) {
240	<	lock.writeLock().lock();
241	<	assertEquals(i,lock.writeLock().getHoldCount());
242	<	}
243	<	for (int i = SIZE; i > 0; i--) {
244	<	lock.writeLock().unlock();
245	<	assertEquals(i-1,lock.writeLock().getHoldCount());
246	<	}
235	>	* writelock.getHoldCount returns number of recursive holds
236	>	*/
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	>	assertEquals(i-1,lock.writeLock().getHoldCount());
248	>	}
249		}
250
251		/**
252		* getReadHoldCount returns number of recursive holds
253		*/
254	<	public void testGetReadHoldCount() {
255	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
256	<	for (int i = 1; i <= SIZE; i++) {
257	<	lock.readLock().lock();
258	<	assertEquals(i,lock.getReadHoldCount());
259	<	}
260	<	for (int i = SIZE; i > 0; i--) {
261	<	lock.readLock().unlock();
262	<	assertEquals(i-1,lock.getReadHoldCount());
263	<	}
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	>	assertEquals(i-1,lock.getReadHoldCount());
265	>	}
266		}
267
174	–
268		/**
269		* write-unlocking an unlocked lock throws IllegalMonitorStateException
270		*/
271	<	public void testUnlock_IllegalMonitorStateException() {
272	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
273	<	try {
274	<	rl.writeLock().unlock();
275	<	shouldThrow();
276	<	} catch (IllegalMonitorStateException success) {}
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 {
276	>	lock.writeLock().unlock();
277	>	shouldThrow();
278	>	} catch (IllegalMonitorStateException success) {}
279		}
280
281	+	/**
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 {
289	+	lock.readLock().unlock();
290	+	shouldThrow();
291	+	} catch (IllegalMonitorStateException success) {}
292	+	}
293
294		/**
295		* write-lockInterruptibly is interruptible
296		*/
297	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
298	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
299	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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();
195	–	lock.writeLock().unlock();
196	–	lock.writeLock().lockInterruptibly();
197	–	lock.writeLock().unlock();
306		}});
307
308	<	lock.writeLock().lock();
201	<	t.start();
202	<	Thread.sleep(SHORT_DELAY_MS);
308	>	waitForQueuedThread(lock, t);
309		t.interrupt();
310	<	Thread.sleep(SHORT_DELAY_MS);
311	<	lock.writeLock().unlock();
206	<	t.join();
310	>	awaitTermination(t);
311	>	releaseWriteLock(lock);
312		}
313
314		/**
315		* timed write-tryLock is interruptible
316		*/
317	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
319	<	lock.writeLock().lock();
320	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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(1000,TimeUnit.MILLISECONDS);
325	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
326		}});
327
328	<	t.start();
328	>	waitForQueuedThread(lock, t);
329		t.interrupt();
330	<	lock.writeLock().unlock();
331	<	t.join();
330	>	awaitTermination(t);
331	>	releaseWriteLock(lock);
332		}
333
334		/**
335		* read-lockInterruptibly is interruptible
336		*/
337	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
338	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
339	<	lock.writeLock().lock();
340	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
348	>	waitForQueuedThread(lock, t);
349		t.interrupt();
350	<	Thread.sleep(SHORT_DELAY_MS);
351	<	lock.writeLock().unlock();
242	<	t.join();
350	>	awaitTermination(t);
351	>	releaseWriteLock(lock);
352		}
353
354		/**
355		* timed read-tryLock is interruptible
356		*/
357	<	public void testReadTryLock_Interrupted() throws InterruptedException {
358	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
359	<	lock.writeLock().lock();
360	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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(1000,TimeUnit.MILLISECONDS);
365	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
366		}});
367
368	<	t.start();
368	>	waitForQueuedThread(lock, t);
369		t.interrupt();
370	<	t.join();
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() throws InterruptedException {
394	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
395	<	lock.writeLock().lock();
396	<	Thread t = new Thread(new Runnable() {
397	<	public void run() {
398	<	threadAssertFalse(lock.writeLock().tryLock());
399	<	}
400	<	});
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	<	t.start();
405	<	t.join();
276	<	lock.writeLock().unlock();
404	>	awaitTermination(t);
405	>	releaseWriteLock(lock);
406		}
407
408		/**
409		* read-tryLock fails if locked
410		*/
411	<	public void testReadTryLockWhenLocked() throws InterruptedException {
412	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
413	<	lock.writeLock().lock();
414	<	Thread t = new Thread(new Runnable() {
415	<	public void run() {
416	<	threadAssertFalse(lock.readLock().tryLock());
417	<	}
418	<	});
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	<	t.start();
423	<	t.join();
293	<	lock.writeLock().unlock();
422	>	awaitTermination(t);
423	>	releaseWriteLock(lock);
424		}
425
426		/**
427		* Multiple threads can hold a read lock when not write-locked
428		*/
429	<	public void testMultipleReadLocks() throws InterruptedException {
430	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
431	<	lock.readLock().lock();
432	<	Thread t = new Thread(new Runnable() {
433	<	public void run() {
434	<	threadAssertTrue(lock.readLock().tryLock());
435	<	lock.readLock().unlock();
436	<	}
437	<	});
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	<	t.start();
310	<	t.join();
444	>	awaitTermination(t);
445		lock.readLock().unlock();
446		}
447
448		/**
449	<	* A writelock succeeds after reading threads unlock
449	>	* A writelock succeeds only after a reading thread unlocks
450		*/
451	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
452	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
453	<	lock.readLock().lock();
454	<	Thread t1 = new Thread(new Runnable() {
455	<	public void run() {
456	<	lock.readLock().lock();
457	<	lock.readLock().unlock();
458	<	}
459	<	});
460	<	Thread t2 = new Thread(new Runnable() {
461	<	public void run() {
462	<	lock.writeLock().lock();
463	<	lock.writeLock().unlock();
464	<	}
465	<	});
466	<
333	<	t1.start();
334	<	t2.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
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	<	t1.join(MEDIUM_DELAY_MS);
469	<	t2.join(MEDIUM_DELAY_MS);
470	<	assertTrue(!t1.isAlive());
340	<	assertTrue(!t2.isAlive());
468	>	assertEquals(0, lock.getReadLockCount());
469	>	awaitTermination(t);
470	>	assertNotWriteLocked(lock);
471		}
472
473		/**
474	<	* Readlocks succeed after a writing thread unlocks
345	<	*/
346	<	public void testReadAfterWriteLock() throws InterruptedException {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	<	lock.writeLock().lock();
349	<	Thread t1 = new Thread(new Runnable() {
350	<	public void run() {
351	<	lock.readLock().lock();
352	<	lock.readLock().unlock();
353	<	}
354	<	});
355	<	Thread t2 = new Thread(new Runnable() {
356	<	public void run() {
357	<	lock.readLock().lock();
358	<	lock.readLock().unlock();
359	<	}
360	<	});
361	<
362	<	t1.start();
363	<	t2.start();
364	<	Thread.sleep(SHORT_DELAY_MS);
365	<	lock.writeLock().unlock();
366	<	t1.join(MEDIUM_DELAY_MS);
367	<	t2.join(MEDIUM_DELAY_MS);
368	<	assertTrue(!t1.isAlive());
369	<	assertTrue(!t2.isAlive());
370	<	}
371	<
372	<	/**
373	<	* Read trylock succeeds if write locked by current thread
474	>	* A writelock succeeds only after reading threads unlock
475		*/
476	<	public void testReadHoldingWriteLock() {
477	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
478	<	lock.writeLock().lock();
479	<	assertTrue(lock.readLock().tryLock());
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.writeLock().unlock();
502	>	lock.readLock().unlock();
503	>	assertEquals(0, lock.getReadLockCount());
504	>	awaitTermination(t2);
505	>	assertNotWriteLocked(lock);
506		}
507
508		/**
509	<	* Read lock succeeds if write locked by current thread even if
510	<	* other threads are waiting for readlock
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 testReadHoldingWriteLock2() throws InterruptedException {
513	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
514	<	lock.writeLock().lock();
515	<	Thread t1 = new Thread(new Runnable() {
391	<	public void run() {
392	<	lock.readLock().lock();
393	<	lock.readLock().unlock();
394	<	}
395	<	});
396	<	Thread t2 = new Thread(new Runnable() {
397	<	public void run() {
398	<	lock.readLock().lock();
399	<	lock.readLock().unlock();
400	<	}
401	<	});
512	>	public void testReaderWriterReaderFairFifo() {
513	>	final PublicReentrantReadWriteLock lock =
514	>	new PublicReentrantReadWriteLock(true);
515	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
516
403	–	t1.start();
404	–	t2.start();
405	–	lock.readLock().lock();
406	–	lock.readLock().unlock();
407	–	Thread.sleep(SHORT_DELAY_MS);
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	<	lock.writeLock().unlock();
542	<	t1.join(MEDIUM_DELAY_MS);
543	<	t2.join(MEDIUM_DELAY_MS);
413	<	assertTrue(!t1.isAlive());
414	<	assertTrue(!t2.isAlive());
541	>	awaitTermination(t1);
542	>	awaitTermination(t2);
543	>	assertNotWriteLocked(lock);
544		}
545
546		/**
547	<	*  Read lock succeeds if write locked by current thread even if
419	<	* other threads are waiting for writelock
547	>	* Readlocks succeed only after a writing thread unlocks
548		*/
549	<	public void testReadHoldingWriteLock3() throws InterruptedException {
550	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
551	<	lock.writeLock().lock();
552	<	Thread t1 = new Thread(new Runnable() {
553	<	public void run() {
554	<	lock.writeLock().lock();
555	<	lock.writeLock().unlock();
556	<	}
557	<	});
558	<	Thread t2 = new Thread(new Runnable() {
559	<	public void run() {
560	<	lock.writeLock().lock();
561	<	lock.writeLock().unlock();
562	<	}
563	<	});
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	<	t1.start();
567	<	t2.start();
568	<	lock.readLock().lock();
569	<	lock.readLock().unlock();
570	<	Thread.sleep(SHORT_DELAY_MS);
442	<	lock.readLock().lock();
443	<	lock.readLock().unlock();
444	<	lock.writeLock().unlock();
445	<	t1.join(MEDIUM_DELAY_MS);
446	<	t2.join(MEDIUM_DELAY_MS);
447	<	assertTrue(!t1.isAlive());
448	<	assertTrue(!t2.isAlive());
566	>	waitForQueuedThread(lock, t1);
567	>	waitForQueuedThread(lock, t2);
568	>	releaseWriteLock(lock);
569	>	awaitTermination(t1);
570	>	awaitTermination(t2);
571		}
572
451	–
573		/**
574	<	*  Write lock succeeds if write locked by current thread even if
454	<	* other threads are waiting for writelock
574	>	* Read trylock succeeds if write locked by current thread
575		*/
576	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
577	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
578	<	lock.writeLock().lock();
579	<	Thread t1 = new Thread(new Runnable() {
460	<	public void run() {
461	<	lock.writeLock().lock();
462	<	lock.writeLock().unlock();
463	<	}
464	<	});
465	<	Thread t2 = new Thread(new Runnable() {
466	<	public void run() {
467	<	lock.writeLock().lock();
468	<	lock.writeLock().unlock();
469	<	}
470	<	});
471	<
472	<	t1.start();
473	<	t2.start();
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();
476	–	Thread.sleep(SHORT_DELAY_MS);
477	–	lock.writeLock().lock();
478	–	lock.writeLock().unlock();
479	–	lock.writeLock().unlock();
480	–	t1.join(MEDIUM_DELAY_MS);
481	–	t2.join(MEDIUM_DELAY_MS);
482	–	assertTrue(!t1.isAlive());
483	–	assertTrue(!t2.isAlive());
584		}
585
486	–
586		/**
587	<	* Fair Read trylock succeeds if write locked by current thread
587	>	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
588		*/
589	<	public void testReadHoldingWriteLockFair() {
590	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
591	<	lock.writeLock().lock();
592	<	assertTrue(lock.readLock().tryLock());
589	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
590	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
591	>	public void testReadTryLockBarging(boolean fair) {
592	>	final PublicReentrantReadWriteLock lock =
593	>	new PublicReentrantReadWriteLock(fair);
594	>	lock.readLock().lock();
595	>
596	>	Thread t1 = newStartedThread(new CheckedRunnable() {
597	>	public void realRun() {
598	>	lock.writeLock().lock();
599	>	lock.writeLock().unlock();
600	>	}});
601	>
602	>	waitForQueuedThread(lock, t1);
603	>
604	>	Thread t2 = newStartedThread(new CheckedRunnable() {
605	>	public void realRun() {
606	>	lock.readLock().lock();
607	>	lock.readLock().unlock();
608	>	}});
609	>
610	>	if (fair)
611	>	waitForQueuedThread(lock, t2);
612	>
613	>	Thread t3 = newStartedThread(new CheckedRunnable() {
614	>	public void realRun() {
615	>	lock.readLock().tryLock();
616	>	lock.readLock().unlock();
617	>	}});
618	>
619	>	assertTrue(lock.getReadLockCount() > 0);
620	>	awaitTermination(t3);
621	>	assertTrue(t1.isAlive());
622	>	if (fair) assertTrue(t2.isAlive());
623		lock.readLock().unlock();
624	<	lock.writeLock().unlock();
624	>	awaitTermination(t1);
625	>	awaitTermination(t2);
626		}
627
628		/**
629	<	* Fair Read lock succeeds if write locked by current thread even if
629	>	* Read lock succeeds if write locked by current thread even if
630		* other threads are waiting for readlock
631		*/
632	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
633	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
634	<	lock.writeLock().lock();
635	<	Thread t1 = new Thread(new Runnable() {
636	<	public void run() {
637	<	lock.readLock().lock();
508	<	lock.readLock().unlock();
509	<	}
510	<	});
511	<	Thread t2 = new Thread(new Runnable() {
512	<	public void run() {
513	<	lock.readLock().lock();
514	<	lock.readLock().unlock();
515	<	}
516	<	});
517	<
518	<	t1.start();
519	<	t2.start();
632	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
633	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
634	>	public void testReadHoldingWriteLock2(boolean fair) {
635	>	final PublicReentrantReadWriteLock lock =
636	>	new PublicReentrantReadWriteLock(fair);
637	>	lock.writeLock().lock();
638		lock.readLock().lock();
639		lock.readLock().unlock();
640	<	Thread.sleep(SHORT_DELAY_MS);
640	>
641	>	Thread t1 = newStartedThread(new CheckedRunnable() {
642	>	public void realRun() {
643	>	lock.readLock().lock();
644	>	lock.readLock().unlock();
645	>	}});
646	>	Thread t2 = newStartedThread(new CheckedRunnable() {
647	>	public void realRun() {
648	>	lock.readLock().lock();
649	>	lock.readLock().unlock();
650	>	}});
651	>
652	>	waitForQueuedThread(lock, t1);
653	>	waitForQueuedThread(lock, t2);
654	>	assertWriteLockedByMoi(lock);
655		lock.readLock().lock();
656		lock.readLock().unlock();
657	<	lock.writeLock().unlock();
658	<	t1.join(MEDIUM_DELAY_MS);
659	<	t2.join(MEDIUM_DELAY_MS);
528	<	assertTrue(!t1.isAlive());
529	<	assertTrue(!t2.isAlive());
657	>	releaseWriteLock(lock);
658	>	awaitTermination(t1);
659	>	awaitTermination(t2);
660		}
661
532	–
662		/**
663	<	* Fair Read lock succeeds if write locked by current thread even if
663	>	* Read lock succeeds if write locked by current thread even if
664		* other threads are waiting for writelock
665		*/
666	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
667	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
668	<	lock.writeLock().lock();
669	<	Thread t1 = new Thread(new Runnable() {
670	<	public void run() {
671	<	lock.writeLock().lock();
543	<	lock.writeLock().unlock();
544	<	}
545	<	});
546	<	Thread t2 = new Thread(new Runnable() {
547	<	public void run() {
548	<	lock.writeLock().lock();
549	<	lock.writeLock().unlock();
550	<	}
551	<	});
552	<
553	<	t1.start();
554	<	t2.start();
666	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
667	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
668	>	public void testReadHoldingWriteLock3(boolean fair) {
669	>	final PublicReentrantReadWriteLock lock =
670	>	new PublicReentrantReadWriteLock(fair);
671	>	lock.writeLock().lock();
672		lock.readLock().lock();
673		lock.readLock().unlock();
674	<	Thread.sleep(SHORT_DELAY_MS);
674	>
675	>	Thread t1 = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	lock.writeLock().lock();
678	>	lock.writeLock().unlock();
679	>	}});
680	>	Thread t2 = newStartedThread(new CheckedRunnable() {
681	>	public void realRun() {
682	>	lock.writeLock().lock();
683	>	lock.writeLock().unlock();
684	>	}});
685	>
686	>	waitForQueuedThread(lock, t1);
687	>	waitForQueuedThread(lock, t2);
688	>	assertWriteLockedByMoi(lock);
689		lock.readLock().lock();
690		lock.readLock().unlock();
691	+	assertWriteLockedByMoi(lock);
692		lock.writeLock().unlock();
693	<	t1.join(MEDIUM_DELAY_MS);
694	<	t2.join(MEDIUM_DELAY_MS);
563	<	assertTrue(!t1.isAlive());
564	<	assertTrue(!t2.isAlive());
693	>	awaitTermination(t1);
694	>	awaitTermination(t2);
695		}
696
567	–
697		/**
698	<	* Fair Write lock succeeds if write locked by current thread even if
698	>	* Write lock succeeds if write locked by current thread even if
699		* other threads are waiting for writelock
700		*/
701	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
702	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
703	<	lock.writeLock().lock();
704	<	Thread t1 = new Thread(new Runnable() {
705	<	public void run() {
706	<	lock.writeLock().lock();
578	<	lock.writeLock().unlock();
579	<	}
580	<	});
581	<	Thread t2 = new Thread(new Runnable() {
582	<	public void run() {
583	<	lock.writeLock().lock();
584	<	lock.writeLock().unlock();
585	<	}
586	<	});
587	<
588	<	t1.start();
589	<	t2.start();
590	<	Thread.sleep(SHORT_DELAY_MS);
591	<	assertTrue(lock.isWriteLockedByCurrentThread());
592	<	assertTrue(lock.getWriteHoldCount() == 1);
701	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
702	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
703	>	public void testWriteHoldingWriteLock4(boolean fair) {
704	>	final PublicReentrantReadWriteLock lock =
705	>	new PublicReentrantReadWriteLock(fair);
706	>	lock.writeLock().lock();
707		lock.writeLock().lock();
594	–	assertTrue(lock.getWriteHoldCount() == 2);
708		lock.writeLock().unlock();
709	+
710	+	Thread t1 = newStartedThread(new CheckedRunnable() {
711	+	public void realRun() {
712	+	lock.writeLock().lock();
713	+	lock.writeLock().unlock();
714	+	}});
715	+	Thread t2 = newStartedThread(new CheckedRunnable() {
716	+	public void realRun() {
717	+	lock.writeLock().lock();
718	+	lock.writeLock().unlock();
719	+	}});
720	+
721	+	waitForQueuedThread(lock, t1);
722	+	waitForQueuedThread(lock, t2);
723	+	assertWriteLockedByMoi(lock);
724	+	assertEquals(1, lock.getWriteHoldCount());
725		lock.writeLock().lock();
726	+	assertWriteLockedByMoi(lock);
727	+	assertEquals(2, lock.getWriteHoldCount());
728		lock.writeLock().unlock();
729	+	assertWriteLockedByMoi(lock);
730	+	assertEquals(1, lock.getWriteHoldCount());
731		lock.writeLock().unlock();
732	<	t1.join(MEDIUM_DELAY_MS);
733	<	t2.join(MEDIUM_DELAY_MS);
601	<	assertTrue(!t1.isAlive());
602	<	assertTrue(!t2.isAlive());
732	>	awaitTermination(t1);
733	>	awaitTermination(t2);
734		}
735
605	–
736		/**
737		* Read tryLock succeeds if readlocked but not writelocked
738		*/
739	<	public void testTryLockWhenReadLocked() throws InterruptedException {
740	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
741	<	lock.readLock().lock();
742	<	Thread t = new Thread(new Runnable() {
743	<	public void run() {
744	<	threadAssertTrue(lock.readLock().tryLock());
745	<	lock.readLock().unlock();
746	<	}
747	<	});
739	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
740	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
741	>	public void testTryLockWhenReadLocked(boolean fair) {
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
743	>	lock.readLock().lock();
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749
750	<	t.start();
620	<	t.join();
750	>	awaitTermination(t);
751		lock.readLock().unlock();
752		}
753
624	–
625	–
754		/**
755		* write tryLock fails when readlocked
756		*/
757	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	<	lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
764	<	});
765	<
638	<	t.start();
639	<	t.join();
640	<	lock.readLock().unlock();
641	<	}
642	<
643	<
644	<	/**
645	<	* Fair Read tryLock succeeds if readlocked but not writelocked
646	<	*/
647	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
648	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
649	<	lock.readLock().lock();
650	<	Thread t = new Thread(new Runnable() {
651	<	public void run() {
652	<	threadAssertTrue(lock.readLock().tryLock());
653	<	lock.readLock().unlock();
654	<	}
655	<	});
656	<
657	<	t.start();
658	<	t.join();
659	<	lock.readLock().unlock();
660	<	}
661	<
662	<
663	<
664	<	/**
665	<	* Fair write tryLock fails when readlocked
666	<	*/
667	<	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
668	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
669	<	lock.readLock().lock();
670	<	Thread t = new Thread(new Runnable() {
671	<	public void run() {
672	<	threadAssertFalse(lock.writeLock().tryLock());
673	<	}
674	<	});
757	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
758	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
759	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
760	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
761	>	lock.readLock().lock();
762	>	Thread t = newStartedThread(new CheckedRunnable() {
763	>	public void realRun() {
764	>	assertFalse(lock.writeLock().tryLock());
765	>	}});
766
767	<	t.start();
677	<	t.join();
767	>	awaitTermination(t);
768		lock.readLock().unlock();
769		}
770
681	–
682	–
771		/**
772		* write timed tryLock times out if locked
773		*/
774	<	public void testWriteTryLock_Timeout() throws InterruptedException {
775	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
776	<	lock.writeLock().lock();
777	<	Thread t = new Thread(new CheckedRunnable() {
774	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
775	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
776	>	public void testWriteTryLock_Timeout(boolean fair) {
777	>	final PublicReentrantReadWriteLock lock =
778	>	new PublicReentrantReadWriteLock(fair);
779	>	lock.writeLock().lock();
780	>	Thread t = newStartedThread(new CheckedRunnable() {
781		public void realRun() throws InterruptedException {
782	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
782	>	long startTime = System.nanoTime();
783	>	long timeoutMillis = 10;
784	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
785	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
786		}});
787
788	<	t.start();
789	<	t.join();
696	<	lock.writeLock().unlock();
788	>	awaitTermination(t);
789	>	releaseWriteLock(lock);
790		}
791
792		/**
793		* read timed tryLock times out if write-locked
794		*/
795	<	public void testReadTryLock_Timeout() throws InterruptedException {
796	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
797	<	lock.writeLock().lock();
798	<	Thread t = new Thread(new CheckedRunnable() {
795	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
796	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
797	>	public void testReadTryLock_Timeout(boolean fair) {
798	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
799	>	lock.writeLock().lock();
800	>	Thread t = newStartedThread(new CheckedRunnable() {
801		public void realRun() throws InterruptedException {
802	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
802	>	long startTime = System.nanoTime();
803	>	long timeoutMillis = 10;
804	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
805	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
806		}});
807
808	<	t.start();
809	<	t.join();
808	>	awaitTermination(t);
809	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
810		lock.writeLock().unlock();
811		}
812
715	–
813		/**
814	<	* write lockInterruptibly succeeds if lock free else is interruptible
814	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
815		*/
816	<	public void testWriteLockInterruptibly() throws InterruptedException {
817	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	<	lock.writeLock().lockInterruptibly();
819	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
816	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
817	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
818	>	public void testWriteLockInterruptibly(boolean fair) {
819	>	final PublicReentrantReadWriteLock lock =
820	>	new PublicReentrantReadWriteLock(fair);
821	>	try {
822	>	lock.writeLock().lockInterruptibly();
823	>	} catch (InterruptedException ie) {
824	>	threadUnexpectedException(ie);
825	>	}
826	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
827		public void realRun() throws InterruptedException {
828		lock.writeLock().lockInterruptibly();
829		}});
830
831	<	t.start();
728	<	Thread.sleep(SHORT_DELAY_MS);
831	>	waitForQueuedThread(lock, t);
832		t.interrupt();
833	<	Thread.sleep(SHORT_DELAY_MS);
834	<	t.join();
835	<	lock.writeLock().unlock();
833	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
834	>	awaitTermination(t);
835	>	releaseWriteLock(lock);
836		}
837
838		/**
839	<	*  read lockInterruptibly succeeds if lock free else is interruptible
839	>	* read lockInterruptibly succeeds if lock free else is interruptible
840		*/
841	<	public void testReadLockInterruptibly() throws InterruptedException {
842	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
843	<	lock.writeLock().lockInterruptibly();
844	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
841	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
842	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
843	>	public void testReadLockInterruptibly(boolean fair) {
844	>	final PublicReentrantReadWriteLock lock =
845	>	new PublicReentrantReadWriteLock(fair);
846	>	try {
847	>	lock.readLock().lockInterruptibly();
848	>	lock.readLock().unlock();
849	>	lock.writeLock().lockInterruptibly();
850	>	} catch (InterruptedException ie) {
851	>	threadUnexpectedException(ie);
852	>	}
853	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
854		public void realRun() throws InterruptedException {
855		lock.readLock().lockInterruptibly();
856		}});
857
858	<	t.start();
747	<	Thread.sleep(SHORT_DELAY_MS);
858	>	waitForQueuedThread(lock, t);
859		t.interrupt();
860	<	t.join();
861	<	lock.writeLock().unlock();
860	>	awaitTermination(t);
861	>	releaseWriteLock(lock);
862		}
863
864		/**
865		* Calling await without holding lock throws IllegalMonitorStateException
866		*/
867	<	public void testAwait_IllegalMonitor() throws InterruptedException {
868	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
867	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
868	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
869	>	public void testAwait_IMSE(boolean fair) {
870	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
871		final Condition c = lock.writeLock().newCondition();
872	<	try {
873	<	c.await();
874	<	shouldThrow();
875	<	} catch (IllegalMonitorStateException success) {}
872	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
873	>	long startTime = System.nanoTime();
874	>	try {
875	>	await(c, awaitMethod);
876	>	shouldThrow();
877	>	} catch (IllegalMonitorStateException success) {
878	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
879	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
880	>	}
881		}
882
883		/**
884		* Calling signal without holding lock throws IllegalMonitorStateException
885		*/
886	<	public void testSignal_IllegalMonitor() {
887	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
886	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
887	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
888	>	public void testSignal_IMSE(boolean fair) {
889	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
890		final Condition c = lock.writeLock().newCondition();
891		try {
892		c.signal();
#	Line 775 | Line 895 | public class ReentrantReadWriteLockTest
895		}
896
897		/**
898	<	* awaitNanos without a signal times out
898	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
899		*/
900	<	public void testAwaitNanos_Timeout() throws InterruptedException {
901	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
900	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
901	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
902	>	public void testSignalAll_IMSE(boolean fair) {
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
904		final Condition c = lock.writeLock().newCondition();
905	<
906	<	lock.writeLock().lock();
907	<	long t = c.awaitNanos(100);
908	<	assertTrue(t <= 0);
787	<	lock.writeLock().unlock();
905	>	try {
906	>	c.signalAll();
907	>	shouldThrow();
908	>	} catch (IllegalMonitorStateException success) {}
909		}
910
911	+	/**
912	+	* awaitNanos without a signal times out
913	+	*/
914	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
915	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
916	+	public void testAwaitNanos_Timeout(boolean fair) {
917	+	try {
918	+	final ReentrantReadWriteLock lock =
919	+	new ReentrantReadWriteLock(fair);
920	+	final Condition c = lock.writeLock().newCondition();
921	+	lock.writeLock().lock();
922	+	long startTime = System.nanoTime();
923	+	long timeoutMillis = 10;
924	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
925	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
926	+	assertTrue(nanosRemaining <= 0);
927	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
928	+	lock.writeLock().unlock();
929	+	} catch (InterruptedException e) {
930	+	threadUnexpectedException(e);
931	+	}
932	+	}
933
934		/**
935	<	*  timed await without a signal times out
935	>	* timed await without a signal times out
936		*/
937	<	public void testAwait_Timeout() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
939	<	final Condition c = lock.writeLock().newCondition();
940	<	lock.writeLock().lock();
941	<	lock.writeLock().unlock();
937	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
938	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
939	>	public void testAwait_Timeout(boolean fair) {
940	>	try {
941	>	final ReentrantReadWriteLock lock =
942	>	new ReentrantReadWriteLock(fair);
943	>	final Condition c = lock.writeLock().newCondition();
944	>	lock.writeLock().lock();
945	>	long startTime = System.nanoTime();
946	>	long timeoutMillis = 10;
947	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
948	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
949	>	lock.writeLock().unlock();
950	>	} catch (InterruptedException e) {
951	>	threadUnexpectedException(e);
952	>	}
953		}
954
955		/**
956		* awaitUntil without a signal times out
957		*/
958	<	public void testAwaitUntil_Timeout() {
959	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	<	final Condition c = lock.writeLock().newCondition();
961	<	lock.writeLock().lock();
962	<	java.util.Date d = new java.util.Date();
963	<	lock.writeLock().unlock();
958	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
959	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
960	>	public void testAwaitUntil_Timeout(boolean fair) {
961	>	try {
962	>	final ReentrantReadWriteLock lock =
963	>	new ReentrantReadWriteLock(fair);
964	>	final Condition c = lock.writeLock().newCondition();
965	>	lock.writeLock().lock();
966	>	long startTime = System.nanoTime();
967	>	long timeoutMillis = 10;
968	>	java.util.Date d = new java.util.Date();
969	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
970	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
971	>	lock.writeLock().unlock();
972	>	} catch (InterruptedException e) {
973	>	threadUnexpectedException(e);
974	>	}
975		}
976
977		/**
978		* await returns when signalled
979		*/
980	<	public void testAwait() throws InterruptedException {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
980	>	public void testAwait()      { testAwait(false); }
981	>	public void testAwait_fair() { testAwait(true); }
982	>	public void testAwait(boolean fair) {
983	>	final PublicReentrantReadWriteLock lock =
984	>	new PublicReentrantReadWriteLock(fair);
985		final Condition c = lock.writeLock().newCondition();
986	<	Thread t = new Thread(new CheckedRunnable() {
986	>	final CountDownLatch locked = new CountDownLatch(1);
987	>	Thread t = newStartedThread(new CheckedRunnable() {
988		public void realRun() throws InterruptedException {
989		lock.writeLock().lock();
990	+	locked.countDown();
991		c.await();
992		lock.writeLock().unlock();
993		}});
994
995	<	t.start();
826	<	Thread.sleep(SHORT_DELAY_MS);
995	>	await(locked);
996		lock.writeLock().lock();
997	+	assertHasWaiters(lock, c, t);
998		c.signal();
999	+	assertHasNoWaiters(lock, c);
1000	+	assertTrue(t.isAlive());
1001		lock.writeLock().unlock();
1002	<	t.join(SHORT_DELAY_MS);
831	<	assertFalse(t.isAlive());
832	<	}
833	<
834	<	/** A helper class for uninterruptible wait tests */
835	<	class UninterruptableThread extends Thread {
836	<	private Lock lock;
837	<	private Condition c;
838	<
839	<	public volatile boolean canAwake = false;
840	<	public volatile boolean interrupted = false;
841	<	public volatile boolean lockStarted = false;
842	<
843	<	public UninterruptableThread(Lock lock, Condition c) {
844	<	this.lock = lock;
845	<	this.c = c;
846	<	}
847	<
848	<	public synchronized void run() {
849	<	lock.lock();
850	<	lockStarted = true;
851	<
852	<	while (!canAwake) {
853	<	c.awaitUninterruptibly();
854	<	}
855	<
856	<	interrupted = isInterrupted();
857	<	lock.unlock();
858	<	}
1002	>	awaitTermination(t);
1003		}
1004
1005		/**
1006		* awaitUninterruptibly doesn't abort on interrupt
1007		*/
1008	<	public void testAwaitUninterruptibly() throws InterruptedException {
1009	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1008	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1009	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1010	>	public void testAwaitUninterruptibly(boolean fair) {
1011	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1012		final Condition c = lock.writeLock().newCondition();
1013	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1014	<
1015	<	thread.start();
1016	<
1017	<	while (!thread.lockStarted) {
1018	<	Thread.sleep(100);
1019	<	}
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedRunnable() {
1015	>	public void realRun() {
1016	>	lock.writeLock().lock();
1017	>	locked.countDown();
1018	>	c.awaitUninterruptibly();
1019	>	assertTrue(Thread.interrupted());
1020	>	lock.writeLock().unlock();
1021	>	}});
1022
1023	+	await(locked);
1024		lock.writeLock().lock();
1025	<	try {
1026	<	thread.interrupt();
1027	<	thread.canAwake = true;
1028	<	c.signal();
1029	<	} finally {
1030	<	lock.writeLock().unlock();
1031	<	}
1032	<
884	<	thread.join();
885	<	assertTrue(thread.interrupted);
886	<	assertFalse(thread.isAlive());
1025	>	lock.writeLock().unlock();
1026	>	t.interrupt();
1027	>	long timeoutMillis = 10;
1028	>	assertThreadStaysAlive(t, timeoutMillis);
1029	>	lock.writeLock().lock();
1030	>	c.signal();
1031	>	lock.writeLock().unlock();
1032	>	awaitTermination(t);
1033		}
1034
1035		/**
1036	<	* await is interruptible
1036	>	* await/awaitNanos/awaitUntil is interruptible
1037		*/
1038	<	public void testAwait_Interrupt() throws InterruptedException {
1039	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1038	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1039	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1040	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1041	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1042	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1043	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1044	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1045	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1046	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1047	>	final PublicReentrantReadWriteLock lock =
1048	>	new PublicReentrantReadWriteLock(fair);
1049		final Condition c = lock.writeLock().newCondition();
1050	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1050	>	final CountDownLatch locked = new CountDownLatch(1);
1051	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1052		public void realRun() throws InterruptedException {
1053		lock.writeLock().lock();
1054	<	c.await();
1055	<	lock.writeLock().unlock();
1054	>	assertWriteLockedByMoi(lock);
1055	>	assertHasNoWaiters(lock, c);
1056	>	locked.countDown();
1057	>	try {
1058	>	await(c, awaitMethod);
1059	>	} finally {
1060	>	assertWriteLockedByMoi(lock);
1061	>	assertHasNoWaiters(lock, c);
1062	>	lock.writeLock().unlock();
1063	>	assertFalse(Thread.interrupted());
1064	>	}
1065		}});
1066
1067	<	t.start();
1068	<	Thread.sleep(SHORT_DELAY_MS);
1067	>	await(locked);
1068	>	assertHasWaiters(lock, c, t);
1069		t.interrupt();
1070	<	t.join(SHORT_DELAY_MS);
1071	<	assertFalse(t.isAlive());
1070	>	awaitTermination(t);
1071	>	assertNotWriteLocked(lock);
1072		}
1073
1074		/**
1075	<	* awaitNanos is interruptible
1075	>	* signalAll wakes up all threads
1076		*/
1077	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1078	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1077	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1078	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1079	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1080	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1081	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1082	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1083	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1084	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1085	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1086	>	final PublicReentrantReadWriteLock lock =
1087	>	new PublicReentrantReadWriteLock(fair);
1088		final Condition c = lock.writeLock().newCondition();
1089	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1089	>	final CountDownLatch locked = new CountDownLatch(2);
1090	>	final Lock writeLock = lock.writeLock();
1091	>	class Awaiter extends CheckedRunnable {
1092		public void realRun() throws InterruptedException {
1093	<	lock.writeLock().lock();
1094	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1095	<	lock.writeLock().unlock();
1096	<	}});
1093	>	writeLock.lock();
1094	>	locked.countDown();
1095	>	await(c, awaitMethod);
1096	>	writeLock.unlock();
1097	>	}
1098	>	}
1099
1100	<	t.start();
1101	<	Thread.sleep(SHORT_DELAY_MS);
1102	<	t.interrupt();
1103	<	t.join(SHORT_DELAY_MS);
1104	<	assertFalse(t.isAlive());
1100	>	Thread t1 = newStartedThread(new Awaiter());
1101	>	Thread t2 = newStartedThread(new Awaiter());
1102	>
1103	>	await(locked);
1104	>	writeLock.lock();
1105	>	assertHasWaiters(lock, c, t1, t2);
1106	>	c.signalAll();
1107	>	assertHasNoWaiters(lock, c);
1108	>	writeLock.unlock();
1109	>	awaitTermination(t1);
1110	>	awaitTermination(t2);
1111		}
1112
1113		/**
1114	<	* awaitUntil is interruptible
1114	>	* signal wakes up waiting threads in FIFO order.
1115		*/
1116	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1117	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1116	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1117	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1118	>	public void testSignalWakesFifo(boolean fair) {
1119	>	final PublicReentrantReadWriteLock lock =
1120	>	new PublicReentrantReadWriteLock(fair);
1121		final Condition c = lock.writeLock().newCondition();
1122	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1122	>	final CountDownLatch locked1 = new CountDownLatch(1);
1123	>	final CountDownLatch locked2 = new CountDownLatch(1);
1124	>	final Lock writeLock = lock.writeLock();
1125	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1126		public void realRun() throws InterruptedException {
1127	<	lock.writeLock().lock();
1128	<	java.util.Date d = new java.util.Date();
1129	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1130	<	lock.writeLock().unlock();
1127	>	writeLock.lock();
1128	>	locked1.countDown();
1129	>	c.await();
1130	>	writeLock.unlock();
1131		}});
1132
1133	<	t.start();
1134	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	t.interrupt();
1136	<	t.join(SHORT_DELAY_MS);
1137	<	assertFalse(t.isAlive());
1133	>	await(locked1);
1134	>
1135	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1136	>	public void realRun() throws InterruptedException {
1137	>	writeLock.lock();
1138	>	locked2.countDown();
1139	>	c.await();
1140	>	writeLock.unlock();
1141	>	}});
1142	>
1143	>	await(locked2);
1144	>
1145	>	writeLock.lock();
1146	>	assertHasWaiters(lock, c, t1, t2);
1147	>	assertFalse(lock.hasQueuedThreads());
1148	>	c.signal();
1149	>	assertHasWaiters(lock, c, t2);
1150	>	assertTrue(lock.hasQueuedThread(t1));
1151	>	assertFalse(lock.hasQueuedThread(t2));
1152	>	c.signal();
1153	>	assertHasNoWaiters(lock, c);
1154	>	assertTrue(lock.hasQueuedThread(t1));
1155	>	assertTrue(lock.hasQueuedThread(t2));
1156	>	writeLock.unlock();
1157	>	awaitTermination(t1);
1158	>	awaitTermination(t2);
1159		}
1160
1161		/**
1162	<	* signalAll wakes up all threads
1163	<	*/
1164	<	public void testSignalAll() throws InterruptedException {
1165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1162	>	* await after multiple reentrant locking preserves lock count
1163	>	*/
1164	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1165	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1166	>	public void testAwaitLockCount(boolean fair) {
1167	>	final PublicReentrantReadWriteLock lock =
1168	>	new PublicReentrantReadWriteLock(fair);
1169		final Condition c = lock.writeLock().newCondition();
1170	<	Thread t1 = new Thread(new CheckedRunnable() {
1170	>	final CountDownLatch locked = new CountDownLatch(2);
1171	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1172		public void realRun() throws InterruptedException {
1173		lock.writeLock().lock();
1174	+	assertWriteLockedByMoi(lock);
1175	+	assertEquals(1, lock.writeLock().getHoldCount());
1176	+	locked.countDown();
1177		c.await();
1178	+	assertWriteLockedByMoi(lock);
1179	+	assertEquals(1, lock.writeLock().getHoldCount());
1180		lock.writeLock().unlock();
1181		}});
1182
1183	<	Thread t2 = new Thread(new CheckedRunnable() {
1183	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1184		public void realRun() throws InterruptedException {
1185		lock.writeLock().lock();
1186	+	lock.writeLock().lock();
1187	+	assertWriteLockedByMoi(lock);
1188	+	assertEquals(2, lock.writeLock().getHoldCount());
1189	+	locked.countDown();
1190		c.await();
1191	+	assertWriteLockedByMoi(lock);
1192	+	assertEquals(2, lock.writeLock().getHoldCount());
1193	+	lock.writeLock().unlock();
1194		lock.writeLock().unlock();
1195		}});
1196
1197	<	t1.start();
971	<	t2.start();
972	<	Thread.sleep(SHORT_DELAY_MS);
1197	>	await(locked);
1198		lock.writeLock().lock();
1199	+	assertHasWaiters(lock, c, t1, t2);
1200		c.signalAll();
1201	+	assertHasNoWaiters(lock, c);
1202		lock.writeLock().unlock();
1203	<	t1.join(SHORT_DELAY_MS);
1204	<	t2.join(SHORT_DELAY_MS);
978	<	assertFalse(t1.isAlive());
979	<	assertFalse(t2.isAlive());
1203	>	awaitTermination(t1);
1204	>	awaitTermination(t2);
1205		}
1206
1207		/**
1208		* A serialized lock deserializes as unlocked
1209		*/
1210	<	public void testSerialization() throws Exception {
1211	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1212	<	l.readLock().lock();
1213	<	l.readLock().unlock();
1214	<
1215	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1216	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1217	<	out.writeObject(l);
1218	<	out.close();
1219	<
1220	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1221	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1222	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1223	<	r.readLock().lock();
1224	<	r.readLock().unlock();
1210	>	public void testSerialization()      { testSerialization(false); }
1211	>	public void testSerialization_fair() { testSerialization(true); }
1212	>	public void testSerialization(boolean fair) {
1213	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1214	>	lock.writeLock().lock();
1215	>	lock.readLock().lock();
1216	>
1217	>	ReentrantReadWriteLock clone = serialClone(lock);
1218	>	assertEquals(lock.isFair(), clone.isFair());
1219	>	assertTrue(lock.isWriteLocked());
1220	>	assertFalse(clone.isWriteLocked());
1221	>	assertEquals(1, lock.getReadLockCount());
1222	>	assertEquals(0, clone.getReadLockCount());
1223	>	clone.writeLock().lock();
1224	>	clone.readLock().lock();
1225	>	assertTrue(clone.isWriteLocked());
1226	>	assertEquals(1, clone.getReadLockCount());
1227	>	clone.readLock().unlock();
1228	>	clone.writeLock().unlock();
1229	>	assertFalse(clone.isWriteLocked());
1230	>	assertEquals(1, lock.getReadLockCount());
1231	>	assertEquals(0, clone.getReadLockCount());
1232		}
1233
1234		/**
1235		* hasQueuedThreads reports whether there are waiting threads
1236		*/
1237	<	public void testhasQueuedThreads() throws InterruptedException {
1238	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1237	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1238	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1239	>	public void testHasQueuedThreads(boolean fair) {
1240	>	final PublicReentrantReadWriteLock lock =
1241	>	new PublicReentrantReadWriteLock(fair);
1242		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1243		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1244		assertFalse(lock.hasQueuedThreads());
1245		lock.writeLock().lock();
1246	+	assertFalse(lock.hasQueuedThreads());
1247		t1.start();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1248	>	waitForQueuedThread(lock, t1);
1249		assertTrue(lock.hasQueuedThreads());
1250		t2.start();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1251	>	waitForQueuedThread(lock, t2);
1252		assertTrue(lock.hasQueuedThreads());
1253		t1.interrupt();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1254	>	awaitTermination(t1);
1255		assertTrue(lock.hasQueuedThreads());
1256		lock.writeLock().unlock();
1257	<	Thread.sleep(SHORT_DELAY_MS);
1257	>	awaitTermination(t2);
1258		assertFalse(lock.hasQueuedThreads());
1023	–	t1.join();
1024	–	t2.join();
1259		}
1260
1261		/**
1262		* hasQueuedThread(null) throws NPE
1263		*/
1264	<	public void testHasQueuedThreadNPE() {
1265	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1264	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1265	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1266	>	public void testHasQueuedThreadNPE(boolean fair) {
1267	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1268		try {
1269	<	sync.hasQueuedThread(null);
1269	>	lock.hasQueuedThread(null);
1270		shouldThrow();
1271		} catch (NullPointerException success) {}
1272		}
#	Line 1038 | Line 1274 | public class ReentrantReadWriteLockTest
1274		/**
1275		* hasQueuedThread reports whether a thread is queued.
1276		*/
1277	<	public void testHasQueuedThread() throws InterruptedException {
1278	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1279	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1280	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1281	<	assertFalse(sync.hasQueuedThread(t1));
1282	<	assertFalse(sync.hasQueuedThread(t2));
1283	<	sync.writeLock().lock();
1277	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1278	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1279	>	public void testHasQueuedThread(boolean fair) {
1280	>	final PublicReentrantReadWriteLock lock =
1281	>	new PublicReentrantReadWriteLock(fair);
1282	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1283	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1284	>	assertFalse(lock.hasQueuedThread(t1));
1285	>	assertFalse(lock.hasQueuedThread(t2));
1286	>	lock.writeLock().lock();
1287		t1.start();
1288	<	Thread.sleep(SHORT_DELAY_MS);
1289	<	assertTrue(sync.hasQueuedThread(t1));
1288	>	waitForQueuedThread(lock, t1);
1289	>	assertTrue(lock.hasQueuedThread(t1));
1290	>	assertFalse(lock.hasQueuedThread(t2));
1291		t2.start();
1292	<	Thread.sleep(SHORT_DELAY_MS);
1293	<	assertTrue(sync.hasQueuedThread(t1));
1294	<	assertTrue(sync.hasQueuedThread(t2));
1292	>	waitForQueuedThread(lock, t2);
1293	>	assertTrue(lock.hasQueuedThread(t1));
1294	>	assertTrue(lock.hasQueuedThread(t2));
1295		t1.interrupt();
1296	<	Thread.sleep(SHORT_DELAY_MS);
1297	<	assertFalse(sync.hasQueuedThread(t1));
1298	<	assertTrue(sync.hasQueuedThread(t2));
1299	<	sync.writeLock().unlock();
1300	<	Thread.sleep(SHORT_DELAY_MS);
1301	<	assertFalse(sync.hasQueuedThread(t1));
1302	<	Thread.sleep(SHORT_DELAY_MS);
1063	<	assertFalse(sync.hasQueuedThread(t2));
1064	<	t1.join();
1065	<	t2.join();
1296	>	awaitTermination(t1);
1297	>	assertFalse(lock.hasQueuedThread(t1));
1298	>	assertTrue(lock.hasQueuedThread(t2));
1299	>	lock.writeLock().unlock();
1300	>	awaitTermination(t2);
1301	>	assertFalse(lock.hasQueuedThread(t1));
1302	>	assertFalse(lock.hasQueuedThread(t2));
1303		}
1304
1068	–
1305		/**
1306		* getQueueLength reports number of waiting threads
1307		*/
1308	<	public void testGetQueueLength() throws InterruptedException {
1309	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1308	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1309	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1310	>	public void testGetQueueLength(boolean fair) {
1311	>	final PublicReentrantReadWriteLock lock =
1312	>	new PublicReentrantReadWriteLock(fair);
1313		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1314		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1315		assertEquals(0, lock.getQueueLength());
1316		lock.writeLock().lock();
1317		t1.start();
1318	<	Thread.sleep(SHORT_DELAY_MS);
1318	>	waitForQueuedThread(lock, t1);
1319		assertEquals(1, lock.getQueueLength());
1320		t2.start();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1321	>	waitForQueuedThread(lock, t2);
1322		assertEquals(2, lock.getQueueLength());
1323		t1.interrupt();
1324	<	Thread.sleep(SHORT_DELAY_MS);
1324	>	awaitTermination(t1);
1325		assertEquals(1, lock.getQueueLength());
1326		lock.writeLock().unlock();
1327	<	Thread.sleep(SHORT_DELAY_MS);
1327	>	awaitTermination(t2);
1328		assertEquals(0, lock.getQueueLength());
1090	–	t1.join();
1091	–	t2.join();
1329		}
1330
1331		/**
1332		* getQueuedThreads includes waiting threads
1333		*/
1334	<	public void testGetQueuedThreads() throws InterruptedException {
1335	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1334	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1335	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1336	>	public void testGetQueuedThreads(boolean fair) {
1337	>	final PublicReentrantReadWriteLock lock =
1338	>	new PublicReentrantReadWriteLock(fair);
1339		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1340		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1341		assertTrue(lock.getQueuedThreads().isEmpty());
1342		lock.writeLock().lock();
1343		assertTrue(lock.getQueuedThreads().isEmpty());
1344		t1.start();
1345	<	Thread.sleep(SHORT_DELAY_MS);
1345	>	waitForQueuedThread(lock, t1);
1346	>	assertEquals(1, lock.getQueuedThreads().size());
1347		assertTrue(lock.getQueuedThreads().contains(t1));
1348		t2.start();
1349	<	Thread.sleep(SHORT_DELAY_MS);
1349	>	waitForQueuedThread(lock, t2);
1350	>	assertEquals(2, lock.getQueuedThreads().size());
1351		assertTrue(lock.getQueuedThreads().contains(t1));
1352		assertTrue(lock.getQueuedThreads().contains(t2));
1353		t1.interrupt();
1354	<	Thread.sleep(SHORT_DELAY_MS);
1354	>	awaitTermination(t1);
1355		assertFalse(lock.getQueuedThreads().contains(t1));
1356		assertTrue(lock.getQueuedThreads().contains(t2));
1357	+	assertEquals(1, lock.getQueuedThreads().size());
1358		lock.writeLock().unlock();
1359	<	Thread.sleep(SHORT_DELAY_MS);
1359	>	awaitTermination(t2);
1360		assertTrue(lock.getQueuedThreads().isEmpty());
1118	–	t1.join();
1119	–	t2.join();
1361		}
1362
1363		/**
1364		* hasWaiters throws NPE if null
1365		*/
1366	<	public void testHasWaitersNPE() {
1367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1366	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1367	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1368	>	public void testHasWaitersNPE(boolean fair) {
1369	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1370		try {
1371		lock.hasWaiters(null);
1372		shouldThrow();
#	Line 1133 | Line 1376 | public class ReentrantReadWriteLockTest
1376		/**
1377		* getWaitQueueLength throws NPE if null
1378		*/
1379	<	public void testGetWaitQueueLengthNPE() {
1380	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1379	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1380	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1381	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1382	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1383		try {
1384		lock.getWaitQueueLength(null);
1385		shouldThrow();
1386		} catch (NullPointerException success) {}
1387		}
1388
1144	–
1389		/**
1390		* getWaitingThreads throws NPE if null
1391		*/
1392	<	public void testGetWaitingThreadsNPE() {
1393	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1392	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1393	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1394	>	public void testGetWaitingThreadsNPE(boolean fair) {
1395	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1396		try {
1397		lock.getWaitingThreads(null);
1398		shouldThrow();
#	Line 1154 | Line 1400 | public class ReentrantReadWriteLockTest
1400		}
1401
1402		/**
1403	<	* hasWaiters throws IAE if not owned
1403	>	* hasWaiters throws IllegalArgumentException if not owned
1404		*/
1405	<	public void testHasWaitersIAE() {
1406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1405	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1406	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1407	>	public void testHasWaitersIAE(boolean fair) {
1408	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1409		final Condition c = lock.writeLock().newCondition();
1410	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1410	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1411		try {
1412		lock2.hasWaiters(c);
1413		shouldThrow();
#	Line 1167 | Line 1415 | public class ReentrantReadWriteLockTest
1415		}
1416
1417		/**
1418	<	* hasWaiters throws IMSE if not locked
1418	>	* hasWaiters throws IllegalMonitorStateException if not locked
1419		*/
1420	<	public void testHasWaitersIMSE() {
1421	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1420	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1421	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1422	>	public void testHasWaitersIMSE(boolean fair) {
1423	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1424		final Condition c = lock.writeLock().newCondition();
1425		try {
1426		lock.hasWaiters(c);
#	Line 1178 | Line 1428 | public class ReentrantReadWriteLockTest
1428		} catch (IllegalMonitorStateException success) {}
1429		}
1430
1181	–
1431		/**
1432	<	* getWaitQueueLength throws IAE if not owned
1432	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1433		*/
1434	<	public void testGetWaitQueueLengthIAE() {
1435	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1434	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1435	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1436	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1437	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1438		final Condition c = lock.writeLock().newCondition();
1439	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1439	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1440		try {
1441		lock2.getWaitQueueLength(c);
1442		shouldThrow();
#	Line 1193 | Line 1444 | public class ReentrantReadWriteLockTest
1444		}
1445
1446		/**
1447	<	* getWaitQueueLength throws IMSE if not locked
1447	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1448		*/
1449	<	public void testGetWaitQueueLengthIMSE() {
1450	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1449	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1450	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1451	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1452	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1453		final Condition c = lock.writeLock().newCondition();
1454		try {
1455		lock.getWaitQueueLength(c);
#	Line 1204 | Line 1457 | public class ReentrantReadWriteLockTest
1457		} catch (IllegalMonitorStateException success) {}
1458		}
1459
1207	–
1460		/**
1461	<	* getWaitingThreads throws IAE if not owned
1461	>	* getWaitingThreads throws IllegalArgumentException if not owned
1462		*/
1463	<	public void testGetWaitingThreadsIAE() {
1464	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1463	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1464	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1465	>	public void testGetWaitingThreadsIAE(boolean fair) {
1466	>	final PublicReentrantReadWriteLock lock =
1467	>	new PublicReentrantReadWriteLock(fair);
1468		final Condition c = lock.writeLock().newCondition();
1469	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1469	>	final PublicReentrantReadWriteLock lock2 =
1470	>	new PublicReentrantReadWriteLock(fair);
1471		try {
1472		lock2.getWaitingThreads(c);
1473		shouldThrow();
#	Line 1219 | Line 1475 | public class ReentrantReadWriteLockTest
1475		}
1476
1477		/**
1478	<	* getWaitingThreads throws IMSE if not locked
1478	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1479		*/
1480	<	public void testGetWaitingThreadsIMSE() {
1481	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1480	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1481	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1482	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1483	>	final PublicReentrantReadWriteLock lock =
1484	>	new PublicReentrantReadWriteLock(fair);
1485		final Condition c = lock.writeLock().newCondition();
1486		try {
1487		lock.getWaitingThreads(c);
#	Line 1230 | Line 1489 | public class ReentrantReadWriteLockTest
1489		} catch (IllegalMonitorStateException success) {}
1490		}
1491
1233	–
1492		/**
1493		* hasWaiters returns true when a thread is waiting, else false
1494		*/
1495	<	public void testHasWaiters() throws InterruptedException {
1496	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1495	>	public void testHasWaiters()      { testHasWaiters(false); }
1496	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1497	>	public void testHasWaiters(boolean fair) {
1498	>	final PublicReentrantReadWriteLock lock =
1499	>	new PublicReentrantReadWriteLock(fair);
1500		final Condition c = lock.writeLock().newCondition();
1501	<	Thread t = new Thread(new CheckedRunnable() {
1501	>	final CountDownLatch locked = new CountDownLatch(1);
1502	>	Thread t = newStartedThread(new CheckedRunnable() {
1503		public void realRun() throws InterruptedException {
1504		lock.writeLock().lock();
1505	<	threadAssertFalse(lock.hasWaiters(c));
1506	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1505	>	assertHasNoWaiters(lock, c);
1506	>	assertFalse(lock.hasWaiters(c));
1507	>	locked.countDown();
1508		c.await();
1509	+	assertHasNoWaiters(lock, c);
1510	+	assertFalse(lock.hasWaiters(c));
1511		lock.writeLock().unlock();
1512		}});
1513
1514	<	t.start();
1250	<	Thread.sleep(SHORT_DELAY_MS);
1514	>	await(locked);
1515		lock.writeLock().lock();
1516	+	assertHasWaiters(lock, c, t);
1517		assertTrue(lock.hasWaiters(c));
1253	–	assertEquals(1, lock.getWaitQueueLength(c));
1518		c.signal();
1519	<	lock.writeLock().unlock();
1256	<	Thread.sleep(SHORT_DELAY_MS);
1257	<	lock.writeLock().lock();
1519	>	assertHasNoWaiters(lock, c);
1520		assertFalse(lock.hasWaiters(c));
1259	–	assertEquals(0, lock.getWaitQueueLength(c));
1521		lock.writeLock().unlock();
1522	<	t.join(SHORT_DELAY_MS);
1523	<	assertFalse(t.isAlive());
1522	>	awaitTermination(t);
1523	>	assertHasNoWaiters(lock, c);
1524		}
1525
1526		/**
1527		* getWaitQueueLength returns number of waiting threads
1528		*/
1529	<	public void testGetWaitQueueLength() throws InterruptedException {
1530	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1529	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1530	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1531	>	public void testGetWaitQueueLength(boolean fair) {
1532	>	final PublicReentrantReadWriteLock lock =
1533	>	new PublicReentrantReadWriteLock(fair);
1534		final Condition c = lock.writeLock().newCondition();
1535	<	Thread t = new Thread(new CheckedRunnable() {
1535	>	final CountDownLatch locked = new CountDownLatch(1);
1536	>	Thread t = newStartedThread(new CheckedRunnable() {
1537		public void realRun() throws InterruptedException {
1538		lock.writeLock().lock();
1539	<	threadAssertFalse(lock.hasWaiters(c));
1540	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1539	>	assertEquals(0, lock.getWaitQueueLength(c));
1540	>	locked.countDown();
1541		c.await();
1542		lock.writeLock().unlock();
1543		}});
1544
1545	<	t.start();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1545	>	await(locked);
1546		lock.writeLock().lock();
1547	<	assertTrue(lock.hasWaiters(c));
1547	>	assertHasWaiters(lock, c, t);
1548		assertEquals(1, lock.getWaitQueueLength(c));
1549		c.signal();
1550	<	lock.writeLock().unlock();
1287	<	Thread.sleep(SHORT_DELAY_MS);
1288	<	lock.writeLock().lock();
1289	<	assertFalse(lock.hasWaiters(c));
1550	>	assertHasNoWaiters(lock, c);
1551		assertEquals(0, lock.getWaitQueueLength(c));
1552		lock.writeLock().unlock();
1553	<	t.join(SHORT_DELAY_MS);
1293	<	assertFalse(t.isAlive());
1553	>	awaitTermination(t);
1554		}
1555
1296	–
1556		/**
1557		* getWaitingThreads returns only and all waiting threads
1558		*/
1559	<	public void testGetWaitingThreads() throws InterruptedException {
1560	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1559	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1560	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1561	>	public void testGetWaitingThreads(boolean fair) {
1562	>	final PublicReentrantReadWriteLock lock =
1563	>	new PublicReentrantReadWriteLock(fair);
1564		final Condition c = lock.writeLock().newCondition();
1565	<	Thread t1 = new Thread(new CheckedRunnable() {
1565	>	final CountDownLatch locked1 = new CountDownLatch(1);
1566	>	final CountDownLatch locked2 = new CountDownLatch(1);
1567	>	Thread t1 = new Thread(new CheckedRunnable() {
1568		public void realRun() throws InterruptedException {
1569		lock.writeLock().lock();
1570	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1570	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1571	>	locked1.countDown();
1572		c.await();
1573		lock.writeLock().unlock();
1574		}});
1575
1576	<	Thread t2 = new Thread(new CheckedRunnable() {
1576	>	Thread t2 = new Thread(new CheckedRunnable() {
1577		public void realRun() throws InterruptedException {
1578		lock.writeLock().lock();
1579	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1579	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1580	>	locked2.countDown();
1581		c.await();
1582		lock.writeLock().unlock();
1583		}});
#	Line 1319 | Line 1585 | public class ReentrantReadWriteLockTest
1585		lock.writeLock().lock();
1586		assertTrue(lock.getWaitingThreads(c).isEmpty());
1587		lock.writeLock().unlock();
1588	+
1589		t1.start();
1590	<	Thread.sleep(SHORT_DELAY_MS);
1590	>	await(locked1);
1591		t2.start();
1592	<	Thread.sleep(SHORT_DELAY_MS);
1592	>	await(locked2);
1593	>
1594		lock.writeLock().lock();
1595		assertTrue(lock.hasWaiters(c));
1596		assertTrue(lock.getWaitingThreads(c).contains(t1));
1597		assertTrue(lock.getWaitingThreads(c).contains(t2));
1598	+	assertEquals(2, lock.getWaitingThreads(c).size());
1599		c.signalAll();
1600	+	assertHasNoWaiters(lock, c);
1601		lock.writeLock().unlock();
1602	<	Thread.sleep(SHORT_DELAY_MS);
1603	<	lock.writeLock().lock();
1604	<	assertFalse(lock.hasWaiters(c));
1605	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1606	<	lock.writeLock().unlock();
1337	<	t1.join(SHORT_DELAY_MS);
1338	<	t2.join(SHORT_DELAY_MS);
1339	<	assertFalse(t1.isAlive());
1340	<	assertFalse(t2.isAlive());
1602	>
1603	>	awaitTermination(t1);
1604	>	awaitTermination(t2);
1605	>
1606	>	assertHasNoWaiters(lock, c);
1607		}
1608
1609		/**
1610		* toString indicates current lock state
1611		*/
1612	<	public void testToString() {
1613	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1612	>	public void testToString()      { testToString(false); }
1613	>	public void testToString_fair() { testToString(true); }
1614	>	public void testToString(boolean fair) {
1615	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1616		String us = lock.toString();
1617		assertTrue(us.indexOf("Write locks = 0") >= 0);
1618		assertTrue(us.indexOf("Read locks = 0") >= 0);
#	Line 1363 | Line 1631 | public class ReentrantReadWriteLockTest
1631		/**
1632		* readLock.toString indicates current lock state
1633		*/
1634	<	public void testReadLockToString() {
1635	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1634	>	public void testReadLockToString()      { testReadLockToString(false); }
1635	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1636	>	public void testReadLockToString(boolean fair) {
1637	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1638		String us = lock.readLock().toString();
1639		assertTrue(us.indexOf("Read locks = 0") >= 0);
1640		lock.readLock().lock();
#	Line 1376 | Line 1646 | public class ReentrantReadWriteLockTest
1646		/**
1647		* writeLock.toString indicates current lock state
1648		*/
1649	<	public void testWriteLockToString() {
1650	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1649	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1650	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1651	>	public void testWriteLockToString(boolean fair) {
1652	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1653		String us = lock.writeLock().toString();
1654		assertTrue(us.indexOf("Unlocked") >= 0);
1655		lock.writeLock().lock();

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