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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.42 by jsr166, Thu Sep 16 00:52:49 2010 UTC vs.
Revision 1.80 by jsr166, Sun May 14 02:03:15 2017 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.locks.*;
11	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
11	<	import java.util.*;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run(suite());
26	>	main(suite(), args);
27		}
28		public static Test suite() {
29		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 32 | Line 40 | public class ReentrantReadWriteLockTest
40		}
41		}
42
35	–
43		/**
44		* A runnable calling lockInterruptibly that expects to be
45		* interrupted
#	Line 50 | Line 57 | public class ReentrantReadWriteLockTest
57		*/
58		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59		PublicReentrantReadWriteLock() { super(); }
60	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	+	public Thread getOwner() {
62	+	return super.getOwner();
63	+	}
64		public Collection<Thread> getQueuedThreads() {
65		return super.getQueuedThreads();
66		}
#	Line 59 | Line 70 | public class ReentrantReadWriteLockTest
70		}
71
72		/**
73	<	* Constructor sets given fairness, and is in unlocked state
73	>	* Releases write lock, checking that it had a hold count of 1.
74		*/
75	<	public void testConstructor() {
76	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
77	<	assertFalse(rl.isFair());
78	<	assertFalse(rl.isWriteLocked());
79	<	assertEquals(0, rl.getReadLockCount());
80	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70	<	assertTrue(r2.isFair());
71	<	assertFalse(r2.isWriteLocked());
72	<	assertEquals(0, r2.getReadLockCount());
73	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	<	assertFalse(r3.isFair());
75	<	assertFalse(r3.isWriteLocked());
76	<	assertEquals(0, r3.getReadLockCount());
75	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	>	assertWriteLockedByMoi(lock);
78	>	assertEquals(1, lock.getWriteHoldCount());
79	>	writeLock.unlock();
80	>	assertNotWriteLocked(lock);
81		}
82
83		/**
84	<	* write-locking and read-locking an unlocked lock succeed
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85		*/
86	<	public void testLock() {
87	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
88	<	rl.writeLock().lock();
89	<	assertTrue(rl.isWriteLocked());
90	<	assertTrue(rl.isWriteLockedByCurrentThread());
91	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
92	<	assertEquals(0, rl.getReadLockCount());
93	<	rl.writeLock().unlock();
94	<	assertFalse(rl.isWriteLocked());
91	<	assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	<	assertEquals(0, rl.getReadLockCount());
94	<	rl.readLock().lock();
95	<	assertFalse(rl.isWriteLocked());
96	<	assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLockCount());
98	<	rl.readLock().unlock();
99	<	assertFalse(rl.isWriteLocked());
100	<	assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLockCount());
86	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
87	>	long startTime = System.nanoTime();
88	>	while (!lock.hasQueuedThread(t)) {
89	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	>	throw new AssertionFailedError("timed out");
91	>	Thread.yield();
92	>	}
93	>	assertTrue(t.isAlive());
94	>	assertNotSame(t, lock.getOwner());
95		}
96
97	+	/**
98	+	* Checks that lock is not write-locked.
99	+	*/
100	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
101	+	assertFalse(lock.isWriteLocked());
102	+	assertFalse(lock.isWriteLockedByCurrentThread());
103	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
104	+	assertEquals(0, lock.getWriteHoldCount());
105	+	assertEquals(0, lock.writeLock().getHoldCount());
106	+	assertNull(lock.getOwner());
107	+	}
108
109		/**
110	<	* locking an unlocked fair lock succeeds
111	<	*/
112	<	public void testFairLock() {
113	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
114	<	rl.writeLock().lock();
115	<	assertTrue(rl.isWriteLocked());
116	<	assertTrue(rl.isWriteLockedByCurrentThread());
117	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
118	<	assertEquals(0, rl.getReadLockCount());
119	<	rl.writeLock().unlock();
120	<	assertFalse(rl.isWriteLocked());
121	<	assertFalse(rl.isWriteLockedByCurrentThread());
122	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
124	<	rl.readLock().lock();
125	<	assertFalse(rl.isWriteLocked());
126	<	assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(1, rl.getReadLockCount());
128	<	rl.readLock().unlock();
129	<	assertFalse(rl.isWriteLocked());
130	<	assertFalse(rl.isWriteLockedByCurrentThread());
131	<	assertEquals(0, rl.getReadLockCount());
110	>	* Checks that lock is write-locked by the given thread.
111	>	*/
112	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
113	>	assertTrue(lock.isWriteLocked());
114	>	assertSame(t, lock.getOwner());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.isWriteLockedByCurrentThread());
117	>	assertEquals(t == Thread.currentThread(),
118	>	lock.writeLock().isHeldByCurrentThread());
119	>	assertEquals(t == Thread.currentThread(),
120	>	lock.getWriteHoldCount() > 0);
121	>	assertEquals(t == Thread.currentThread(),
122	>	lock.writeLock().getHoldCount() > 0);
123	>	assertEquals(0, lock.getReadLockCount());
124	>	}
125	>
126	>	/**
127	>	* Checks that lock is write-locked by the current thread.
128	>	*/
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131	>	}
132	>
133	>	/**
134	>	* Checks that condition c has no waiters.
135	>	*/
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139	>
140	>	/**
141	>	* Checks that condition c has exactly the given waiter threads.
142	>	*/
143	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
144	>	Thread... threads) {
145	>	lock.writeLock().lock();
146	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
147	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
148	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
149	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
150	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
151	>	new HashSet<Thread>(Arrays.asList(threads)));
152	>	lock.writeLock().unlock();
153	>	}
154	>
155	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	>
157	>	/**
158	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
159	>	*/
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	long timeoutMillis = 2 * LONG_DELAY_MS;
163	>	switch (awaitMethod) {
164	>	case await:
165	>	c.await();
166	>	break;
167	>	case awaitTimed:
168	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
169	>	break;
170	>	case awaitNanos:
171	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
172	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
173	>	assertTrue(nanosRemaining > timeoutNanos / 2);
174	>	assertTrue(nanosRemaining <= timeoutNanos);
175	>	break;
176	>	case awaitUntil:
177	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
178	>	break;
179	>	default:
180	>	throw new AssertionError();
181	>	}
182	>	}
183	>
184	>	/**
185	>	* Constructor sets given fairness, and is in unlocked state
186	>	*/
187	>	public void testConstructor() {
188	>	PublicReentrantReadWriteLock lock;
189	>
190	>	lock = new PublicReentrantReadWriteLock();
191	>	assertFalse(lock.isFair());
192	>	assertNotWriteLocked(lock);
193	>	assertEquals(0, lock.getReadLockCount());
194	>
195	>	lock = new PublicReentrantReadWriteLock(true);
196	>	assertTrue(lock.isFair());
197	>	assertNotWriteLocked(lock);
198	>	assertEquals(0, lock.getReadLockCount());
199	>
200	>	lock = new PublicReentrantReadWriteLock(false);
201	>	assertFalse(lock.isFair());
202	>	assertNotWriteLocked(lock);
203	>	assertEquals(0, lock.getReadLockCount());
204	>	}
205	>
206	>	/**
207	>	* write-locking and read-locking an unlocked lock succeed
208	>	*/
209	>	public void testLock()      { testLock(false); }
210	>	public void testLock_fair() { testLock(true); }
211	>	public void testLock(boolean fair) {
212	>	PublicReentrantReadWriteLock lock =
213	>	new PublicReentrantReadWriteLock(fair);
214	>	assertNotWriteLocked(lock);
215	>	lock.writeLock().lock();
216	>	assertWriteLockedByMoi(lock);
217	>	lock.writeLock().unlock();
218	>	assertNotWriteLocked(lock);
219	>	assertEquals(0, lock.getReadLockCount());
220	>	lock.readLock().lock();
221	>	assertNotWriteLocked(lock);
222	>	assertEquals(1, lock.getReadLockCount());
223	>	lock.readLock().unlock();
224	>	assertNotWriteLocked(lock);
225	>	assertEquals(0, lock.getReadLockCount());
226		}
227
228		/**
229		* getWriteHoldCount returns number of recursive holds
230		*/
231	<	public void testGetWriteHoldCount() {
232	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
232	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
233	>	public void testGetWriteHoldCount(boolean fair) {
234	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
235		for (int i = 1; i <= SIZE; i++) {
236		lock.writeLock().lock();
237		assertEquals(i,lock.getWriteHoldCount());
238		}
239		for (int i = SIZE; i > 0; i--) {
240		lock.writeLock().unlock();
241	<	assertEquals(i-1,lock.getWriteHoldCount());
241	>	assertEquals(i - 1,lock.getWriteHoldCount());
242		}
243		}
244
245		/**
246	<	* WriteLock.getHoldCount returns number of recursive holds
246	>	* writelock.getHoldCount returns number of recursive holds
247		*/
248	<	public void testGetHoldCount() {
249	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	>	public void testGetHoldCount()      { testGetHoldCount(false); }
249	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
250	>	public void testGetHoldCount(boolean fair) {
251	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
252		for (int i = 1; i <= SIZE; i++) {
253		lock.writeLock().lock();
254		assertEquals(i,lock.writeLock().getHoldCount());
255		}
256		for (int i = SIZE; i > 0; i--) {
257		lock.writeLock().unlock();
258	<	assertEquals(i-1,lock.writeLock().getHoldCount());
258	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
259		}
260		}
261
262		/**
263		* getReadHoldCount returns number of recursive holds
264		*/
265	<	public void testGetReadHoldCount() {
266	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
265	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
266	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
267	>	public void testGetReadHoldCount(boolean fair) {
268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
269		for (int i = 1; i <= SIZE; i++) {
270		lock.readLock().lock();
271		assertEquals(i,lock.getReadHoldCount());
272		}
273		for (int i = SIZE; i > 0; i--) {
274		lock.readLock().unlock();
275	<	assertEquals(i-1,lock.getReadHoldCount());
275	>	assertEquals(i - 1,lock.getReadHoldCount());
276		}
277		}
278
175	–
279		/**
280		* write-unlocking an unlocked lock throws IllegalMonitorStateException
281		*/
282	<	public void testUnlock_IllegalMonitorStateException() {
283	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
282	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
283	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
284	>	public void testWriteUnlock_IMSE(boolean fair) {
285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
286		try {
287	<	rl.writeLock().unlock();
287	>	lock.writeLock().unlock();
288		shouldThrow();
289		} catch (IllegalMonitorStateException success) {}
290		}
291
292	+	/**
293	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
294	+	*/
295	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
296	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
297	+	public void testReadUnlock_IMSE(boolean fair) {
298	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
299	+	try {
300	+	lock.readLock().unlock();
301	+	shouldThrow();
302	+	} catch (IllegalMonitorStateException success) {}
303	+	}
304
305		/**
306		* write-lockInterruptibly is interruptible
307		*/
308	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
309	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
310	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
308	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
309	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
310	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
311	>	final PublicReentrantReadWriteLock lock =
312	>	new PublicReentrantReadWriteLock(fair);
313	>	lock.writeLock().lock();
314	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
315		public void realRun() throws InterruptedException {
316		lock.writeLock().lockInterruptibly();
196	–	lock.writeLock().unlock();
197	–	lock.writeLock().lockInterruptibly();
198	–	lock.writeLock().unlock();
317		}});
318
319	<	lock.writeLock().lock();
202	<	t.start();
203	<	Thread.sleep(SHORT_DELAY_MS);
319	>	waitForQueuedThread(lock, t);
320		t.interrupt();
321	<	Thread.sleep(SHORT_DELAY_MS);
322	<	lock.writeLock().unlock();
207	<	t.join();
321	>	awaitTermination(t);
322	>	releaseWriteLock(lock);
323		}
324
325		/**
326		* timed write-tryLock is interruptible
327		*/
328	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
329	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
328	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
329	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
330	>	public void testWriteTryLock_Interruptible(boolean fair) {
331	>	final PublicReentrantReadWriteLock lock =
332	>	new PublicReentrantReadWriteLock(fair);
333		lock.writeLock().lock();
334	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
334	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
335		public void realRun() throws InterruptedException {
336	<	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
336	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
337		}});
338
339	<	t.start();
222	<	Thread.sleep(SHORT_DELAY_MS);
339	>	waitForQueuedThread(lock, t);
340		t.interrupt();
341	<	lock.writeLock().unlock();
342	<	t.join();
341	>	awaitTermination(t);
342	>	releaseWriteLock(lock);
343		}
344
345		/**
346		* read-lockInterruptibly is interruptible
347		*/
348	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
349	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
349	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
350	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
351	>	final PublicReentrantReadWriteLock lock =
352	>	new PublicReentrantReadWriteLock(fair);
353		lock.writeLock().lock();
354	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
354	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
355		public void realRun() throws InterruptedException {
356		lock.readLock().lockInterruptibly();
357		}});
358
359	<	t.start();
240	<	Thread.sleep(SHORT_DELAY_MS);
359	>	waitForQueuedThread(lock, t);
360		t.interrupt();
361	<	Thread.sleep(SHORT_DELAY_MS);
362	<	lock.writeLock().unlock();
244	<	t.join();
361	>	awaitTermination(t);
362	>	releaseWriteLock(lock);
363		}
364
365		/**
366		* timed read-tryLock is interruptible
367		*/
368	<	public void testReadTryLock_Interrupted() throws InterruptedException {
369	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
369	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
370	>	public void testReadTryLock_Interruptible(boolean fair) {
371	>	final PublicReentrantReadWriteLock lock =
372	>	new PublicReentrantReadWriteLock(fair);
373		lock.writeLock().lock();
374	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
374	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
375		public void realRun() throws InterruptedException {
376	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
376	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
377		}});
378
379	<	t.start();
259	<	Thread.sleep(SHORT_DELAY_MS);
379	>	waitForQueuedThread(lock, t);
380		t.interrupt();
381	<	t.join();
381	>	awaitTermination(t);
382	>	releaseWriteLock(lock);
383		}
384
385	+	/**
386	+	* write-tryLock on an unlocked lock succeeds
387	+	*/
388	+	public void testWriteTryLock()      { testWriteTryLock(false); }
389	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
390	+	public void testWriteTryLock(boolean fair) {
391	+	final PublicReentrantReadWriteLock lock =
392	+	new PublicReentrantReadWriteLock(fair);
393	+	assertTrue(lock.writeLock().tryLock());
394	+	assertWriteLockedByMoi(lock);
395	+	assertTrue(lock.writeLock().tryLock());
396	+	assertWriteLockedByMoi(lock);
397	+	lock.writeLock().unlock();
398	+	releaseWriteLock(lock);
399	+	}
400
401		/**
402		* write-tryLock fails if locked
403		*/
404	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
405	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
405	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
406	>	public void testWriteTryLockWhenLocked(boolean fair) {
407	>	final PublicReentrantReadWriteLock lock =
408	>	new PublicReentrantReadWriteLock(fair);
409		lock.writeLock().lock();
410	<	Thread t = new Thread(new CheckedRunnable() {
410	>	Thread t = newStartedThread(new CheckedRunnable() {
411		public void realRun() {
412		assertFalse(lock.writeLock().tryLock());
413		}});
414
415	<	t.start();
416	<	t.join();
278	<	lock.writeLock().unlock();
415	>	awaitTermination(t);
416	>	releaseWriteLock(lock);
417		}
418
419		/**
420		* read-tryLock fails if locked
421		*/
422	<	public void testReadTryLockWhenLocked() throws InterruptedException {
423	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
422	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
423	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
424	>	public void testReadTryLockWhenLocked(boolean fair) {
425	>	final PublicReentrantReadWriteLock lock =
426	>	new PublicReentrantReadWriteLock(fair);
427		lock.writeLock().lock();
428	<	Thread t = new Thread(new CheckedRunnable() {
428	>	Thread t = newStartedThread(new CheckedRunnable() {
429		public void realRun() {
430		assertFalse(lock.readLock().tryLock());
431		}});
432
433	<	t.start();
434	<	t.join();
294	<	lock.writeLock().unlock();
433	>	awaitTermination(t);
434	>	releaseWriteLock(lock);
435		}
436
437		/**
438		* Multiple threads can hold a read lock when not write-locked
439		*/
440	<	public void testMultipleReadLocks() throws InterruptedException {
441	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
441	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
442	>	public void testMultipleReadLocks(boolean fair) {
443	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
444		lock.readLock().lock();
445	<	Thread t = new Thread(new CheckedRunnable() {
446	<	public void realRun() {
445	>	Thread t = newStartedThread(new CheckedRunnable() {
446	>	public void realRun() throws InterruptedException {
447		assertTrue(lock.readLock().tryLock());
448		lock.readLock().unlock();
449	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
450	+	lock.readLock().unlock();
451	+	lock.readLock().lock();
452	+	lock.readLock().unlock();
453		}});
454
455	<	t.start();
310	<	t.join();
455	>	awaitTermination(t);
456		lock.readLock().unlock();
457		}
458
459		/**
460	<	* A writelock succeeds after reading threads unlock
460	>	* A writelock succeeds only after a reading thread unlocks
461		*/
462	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
463	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
462	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
463	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
464	>	public void testWriteAfterReadLock(boolean fair) {
465	>	final PublicReentrantReadWriteLock lock =
466	>	new PublicReentrantReadWriteLock(fair);
467		lock.readLock().lock();
468	<	Thread t1 = new Thread(new CheckedRunnable() {
321	<	public void realRun() {
322	<	lock.readLock().lock();
323	<	lock.readLock().unlock();
324	<	}});
325	<	Thread t2 = new Thread(new CheckedRunnable() {
468	>	Thread t = newStartedThread(new CheckedRunnable() {
469		public void realRun() {
470	+	assertEquals(1, lock.getReadLockCount());
471		lock.writeLock().lock();
472	+	assertEquals(0, lock.getReadLockCount());
473		lock.writeLock().unlock();
474		}});
475	<
476	<	t1.start();
477	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
475	>	waitForQueuedThread(lock, t);
476	>	assertNotWriteLocked(lock);
477	>	assertEquals(1, lock.getReadLockCount());
478		lock.readLock().unlock();
479	<	t1.join(MEDIUM_DELAY_MS);
480	<	t2.join(MEDIUM_DELAY_MS);
481	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
479	>	assertEquals(0, lock.getReadLockCount());
480	>	awaitTermination(t);
481	>	assertNotWriteLocked(lock);
482		}
483
484		/**
485	<	* Readlocks succeed after a writing thread unlocks
485	>	* A writelock succeeds only after reading threads unlock
486		*/
487	<	public void testReadAfterWriteLock() throws InterruptedException {
488	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
489	<	lock.writeLock().lock();
490	<	Thread t1 = new Thread(new CheckedRunnable() {
487	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
488	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
489	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
490	>	final PublicReentrantReadWriteLock lock =
491	>	new PublicReentrantReadWriteLock(fair);
492	>	lock.readLock().lock();
493	>	lock.readLock().lock();
494	>	Thread t1 = newStartedThread(new CheckedRunnable() {
495		public void realRun() {
496		lock.readLock().lock();
497	+	assertEquals(3, lock.getReadLockCount());
498		lock.readLock().unlock();
499		}});
500	<	Thread t2 = new Thread(new CheckedRunnable() {
500	>	awaitTermination(t1);
501	>
502	>	Thread t2 = newStartedThread(new CheckedRunnable() {
503		public void realRun() {
504	<	lock.readLock().lock();
505	<	lock.readLock().unlock();
504	>	assertEquals(2, lock.getReadLockCount());
505	>	lock.writeLock().lock();
506	>	assertEquals(0, lock.getReadLockCount());
507	>	lock.writeLock().unlock();
508		}});
509	<
510	<	t1.start();
511	<	t2.start();
512	<	Thread.sleep(SHORT_DELAY_MS);
513	<	lock.writeLock().unlock();
514	<	t1.join(MEDIUM_DELAY_MS);
515	<	t2.join(MEDIUM_DELAY_MS);
516	<	assertTrue(!t1.isAlive());
365	<	assertTrue(!t2.isAlive());
509	>	waitForQueuedThread(lock, t2);
510	>	assertNotWriteLocked(lock);
511	>	assertEquals(2, lock.getReadLockCount());
512	>	lock.readLock().unlock();
513	>	lock.readLock().unlock();
514	>	assertEquals(0, lock.getReadLockCount());
515	>	awaitTermination(t2);
516	>	assertNotWriteLocked(lock);
517		}
518
519		/**
520	<	* Read trylock succeeds if write locked by current thread
520	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
521	>	* will block if there is a waiting writer thread
522		*/
523	<	public void testReadHoldingWriteLock() {
524	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
525	<	lock.writeLock().lock();
526	<	assertTrue(lock.readLock().tryLock());
523	>	public void testReaderWriterReaderFairFifo() {
524	>	final PublicReentrantReadWriteLock lock =
525	>	new PublicReentrantReadWriteLock(true);
526	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
527	>
528	>	lock.readLock().lock();
529	>	Thread t1 = newStartedThread(new CheckedRunnable() {
530	>	public void realRun() {
531	>	assertEquals(1, lock.getReadLockCount());
532	>	lock.writeLock().lock();
533	>	assertEquals(0, lock.getReadLockCount());
534	>	t1GotLock.set(true);
535	>	lock.writeLock().unlock();
536	>	}});
537	>	waitForQueuedThread(lock, t1);
538	>
539	>	Thread t2 = newStartedThread(new CheckedRunnable() {
540	>	public void realRun() {
541	>	assertEquals(1, lock.getReadLockCount());
542	>	lock.readLock().lock();
543	>	assertEquals(1, lock.getReadLockCount());
544	>	assertTrue(t1GotLock.get());
545	>	lock.readLock().unlock();
546	>	}});
547	>	waitForQueuedThread(lock, t2);
548	>	assertTrue(t1.isAlive());
549	>	assertNotWriteLocked(lock);
550	>	assertEquals(1, lock.getReadLockCount());
551		lock.readLock().unlock();
552	<	lock.writeLock().unlock();
552	>	awaitTermination(t1);
553	>	awaitTermination(t2);
554	>	assertNotWriteLocked(lock);
555		}
556
557		/**
558	<	* Read lock succeeds if write locked by current thread even if
381	<	* other threads are waiting for readlock
558	>	* Readlocks succeed only after a writing thread unlocks
559		*/
560	<	public void testReadHoldingWriteLock2() throws InterruptedException {
561	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
560	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
561	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
562	>	public void testReadAfterWriteLock(boolean fair) {
563	>	final PublicReentrantReadWriteLock lock =
564	>	new PublicReentrantReadWriteLock(fair);
565		lock.writeLock().lock();
566	<	Thread t1 = new Thread(new CheckedRunnable() {
566	>	Thread t1 = newStartedThread(new CheckedRunnable() {
567		public void realRun() {
568		lock.readLock().lock();
569		lock.readLock().unlock();
570		}});
571	<	Thread t2 = new Thread(new CheckedRunnable() {
571	>	Thread t2 = newStartedThread(new CheckedRunnable() {
572		public void realRun() {
573		lock.readLock().lock();
574		lock.readLock().unlock();
575		}});
576
577	<	t1.start();
578	<	t2.start();
579	<	lock.readLock().lock();
580	<	lock.readLock().unlock();
581	<	Thread.sleep(SHORT_DELAY_MS);
402	<	lock.readLock().lock();
403	<	lock.readLock().unlock();
404	<	lock.writeLock().unlock();
405	<	t1.join(MEDIUM_DELAY_MS);
406	<	t2.join(MEDIUM_DELAY_MS);
407	<	assertTrue(!t1.isAlive());
408	<	assertTrue(!t2.isAlive());
577	>	waitForQueuedThread(lock, t1);
578	>	waitForQueuedThread(lock, t2);
579	>	releaseWriteLock(lock);
580	>	awaitTermination(t1);
581	>	awaitTermination(t2);
582		}
583
584		/**
585	<	*  Read lock succeeds if write locked by current thread even if
413	<	* other threads are waiting for writelock
585	>	* Read trylock succeeds if write locked by current thread
586		*/
587	<	public void testReadHoldingWriteLock3() throws InterruptedException {
588	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
587	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
588	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
589	>	public void testReadHoldingWriteLock(boolean fair) {
590	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
591		lock.writeLock().lock();
592	<	Thread t1 = new Thread(new CheckedRunnable() {
419	<	public void realRun() {
420	<	lock.writeLock().lock();
421	<	lock.writeLock().unlock();
422	<	}});
423	<	Thread t2 = new Thread(new CheckedRunnable() {
424	<	public void realRun() {
425	<	lock.writeLock().lock();
426	<	lock.writeLock().unlock();
427	<	}});
428	<
429	<	t1.start();
430	<	t2.start();
431	<	lock.readLock().lock();
432	<	lock.readLock().unlock();
433	<	Thread.sleep(SHORT_DELAY_MS);
434	<	lock.readLock().lock();
592	>	assertTrue(lock.readLock().tryLock());
593		lock.readLock().unlock();
594		lock.writeLock().unlock();
437	–	t1.join(MEDIUM_DELAY_MS);
438	–	t2.join(MEDIUM_DELAY_MS);
439	–	assertTrue(!t1.isAlive());
440	–	assertTrue(!t2.isAlive());
595		}
596
443	–
597		/**
598	<	*  Write lock succeeds if write locked by current thread even if
599	<	* other threads are waiting for writelock
598	>	* Read trylock succeeds (barging) even in the presence of waiting
599	>	* readers and/or writers
600		*/
601	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
602	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
603	<	lock.writeLock().lock();
604	<	Thread t1 = new Thread(new CheckedRunnable() {
601	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
602	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
603	>	public void testReadTryLockBarging(boolean fair) {
604	>	final PublicReentrantReadWriteLock lock =
605	>	new PublicReentrantReadWriteLock(fair);
606	>	lock.readLock().lock();
607	>
608	>	Thread t1 = newStartedThread(new CheckedRunnable() {
609		public void realRun() {
610		lock.writeLock().lock();
611		lock.writeLock().unlock();
612		}});
613	<	Thread t2 = new Thread(new CheckedRunnable() {
613	>
614	>	waitForQueuedThread(lock, t1);
615	>
616	>	Thread t2 = newStartedThread(new CheckedRunnable() {
617		public void realRun() {
618	<	lock.writeLock().lock();
619	<	lock.writeLock().unlock();
618	>	lock.readLock().lock();
619	>	lock.readLock().unlock();
620		}});
621
622	<	t1.start();
623	<	t2.start();
464	<	lock.writeLock().lock();
465	<	lock.writeLock().unlock();
466	<	Thread.sleep(SHORT_DELAY_MS);
467	<	lock.writeLock().lock();
468	<	lock.writeLock().unlock();
469	<	lock.writeLock().unlock();
470	<	t1.join(MEDIUM_DELAY_MS);
471	<	t2.join(MEDIUM_DELAY_MS);
472	<	assertTrue(!t1.isAlive());
473	<	assertTrue(!t2.isAlive());
474	<	}
622	>	if (fair)
623	>	waitForQueuedThread(lock, t2);
624
625	+	Thread t3 = newStartedThread(new CheckedRunnable() {
626	+	public void realRun() {
627	+	lock.readLock().tryLock();
628	+	lock.readLock().unlock();
629	+	}});
630
631	<	/**
632	<	* Fair Read trylock succeeds if write locked by current thread
633	<	*/
634	<	public void testReadHoldingWriteLockFair() {
481	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
482	<	lock.writeLock().lock();
483	<	assertTrue(lock.readLock().tryLock());
631	>	assertTrue(lock.getReadLockCount() > 0);
632	>	awaitTermination(t3);
633	>	assertTrue(t1.isAlive());
634	>	if (fair) assertTrue(t2.isAlive());
635		lock.readLock().unlock();
636	<	lock.writeLock().unlock();
636	>	awaitTermination(t1);
637	>	awaitTermination(t2);
638		}
639
640		/**
641	<	* Fair Read lock succeeds if write locked by current thread even if
641	>	* Read lock succeeds if write locked by current thread even if
642		* other threads are waiting for readlock
643		*/
644	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
645	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
644	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
645	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
646	>	public void testReadHoldingWriteLock2(boolean fair) {
647	>	final PublicReentrantReadWriteLock lock =
648	>	new PublicReentrantReadWriteLock(fair);
649		lock.writeLock().lock();
650	<	Thread t1 = new Thread(new CheckedRunnable() {
650	>	lock.readLock().lock();
651	>	lock.readLock().unlock();
652	>
653	>	Thread t1 = newStartedThread(new CheckedRunnable() {
654		public void realRun() {
655		lock.readLock().lock();
656		lock.readLock().unlock();
657		}});
658	<	Thread t2 = new Thread(new CheckedRunnable() {
658	>	Thread t2 = newStartedThread(new CheckedRunnable() {
659		public void realRun() {
660		lock.readLock().lock();
661		lock.readLock().unlock();
662		}});
663
664	<	t1.start();
665	<	t2.start();
664	>	waitForQueuedThread(lock, t1);
665	>	waitForQueuedThread(lock, t2);
666	>	assertWriteLockedByMoi(lock);
667		lock.readLock().lock();
668		lock.readLock().unlock();
669	<	Thread.sleep(SHORT_DELAY_MS);
670	<	lock.readLock().lock();
671	<	lock.readLock().unlock();
513	<	lock.writeLock().unlock();
514	<	t1.join(MEDIUM_DELAY_MS);
515	<	t2.join(MEDIUM_DELAY_MS);
516	<	assertTrue(!t1.isAlive());
517	<	assertTrue(!t2.isAlive());
669	>	releaseWriteLock(lock);
670	>	awaitTermination(t1);
671	>	awaitTermination(t2);
672		}
673
520	–
674		/**
675	<	* Fair Read lock succeeds if write locked by current thread even if
675	>	* Read lock succeeds if write locked by current thread even if
676		* other threads are waiting for writelock
677		*/
678	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
679	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
678	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
679	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
680	>	public void testReadHoldingWriteLock3(boolean fair) {
681	>	final PublicReentrantReadWriteLock lock =
682	>	new PublicReentrantReadWriteLock(fair);
683		lock.writeLock().lock();
684	<	Thread t1 = new Thread(new CheckedRunnable() {
684	>	lock.readLock().lock();
685	>	lock.readLock().unlock();
686	>
687	>	Thread t1 = newStartedThread(new CheckedRunnable() {
688		public void realRun() {
689		lock.writeLock().lock();
690		lock.writeLock().unlock();
691		}});
692	<	Thread t2 = new Thread(new CheckedRunnable() {
692	>	Thread t2 = newStartedThread(new CheckedRunnable() {
693		public void realRun() {
694		lock.writeLock().lock();
695		lock.writeLock().unlock();
696		}});
697
698	<	t1.start();
699	<	t2.start();
700	<	lock.readLock().lock();
542	<	lock.readLock().unlock();
543	<	Thread.sleep(SHORT_DELAY_MS);
698	>	waitForQueuedThread(lock, t1);
699	>	waitForQueuedThread(lock, t2);
700	>	assertWriteLockedByMoi(lock);
701		lock.readLock().lock();
702		lock.readLock().unlock();
703	+	assertWriteLockedByMoi(lock);
704		lock.writeLock().unlock();
705	<	t1.join(MEDIUM_DELAY_MS);
706	<	t2.join(MEDIUM_DELAY_MS);
549	<	assertTrue(!t1.isAlive());
550	<	assertTrue(!t2.isAlive());
705	>	awaitTermination(t1);
706	>	awaitTermination(t2);
707		}
708
553	–
709		/**
710	<	* Fair Write lock succeeds if write locked by current thread even if
710	>	* Write lock succeeds if write locked by current thread even if
711		* other threads are waiting for writelock
712		*/
713	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
714	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
713	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
714	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
715	>	public void testWriteHoldingWriteLock4(boolean fair) {
716	>	final PublicReentrantReadWriteLock lock =
717	>	new PublicReentrantReadWriteLock(fair);
718		lock.writeLock().lock();
719	<	Thread t1 = new Thread(new CheckedRunnable() {
719	>	lock.writeLock().lock();
720	>	lock.writeLock().unlock();
721	>
722	>	Thread t1 = newStartedThread(new CheckedRunnable() {
723		public void realRun() {
724		lock.writeLock().lock();
725		lock.writeLock().unlock();
726		}});
727	<	Thread t2 = new Thread(new CheckedRunnable() {
727	>	Thread t2 = newStartedThread(new CheckedRunnable() {
728		public void realRun() {
729		lock.writeLock().lock();
730		lock.writeLock().unlock();
731		}});
732
733	<	t1.start();
734	<	t2.start();
735	<	Thread.sleep(SHORT_DELAY_MS);
575	<	assertTrue(lock.isWriteLockedByCurrentThread());
733	>	waitForQueuedThread(lock, t1);
734	>	waitForQueuedThread(lock, t2);
735	>	assertWriteLockedByMoi(lock);
736		assertEquals(1, lock.getWriteHoldCount());
737		lock.writeLock().lock();
738	+	assertWriteLockedByMoi(lock);
739		assertEquals(2, lock.getWriteHoldCount());
740		lock.writeLock().unlock();
741	<	lock.writeLock().lock();
742	<	lock.writeLock().unlock();
741	>	assertWriteLockedByMoi(lock);
742	>	assertEquals(1, lock.getWriteHoldCount());
743		lock.writeLock().unlock();
744	<	t1.join(MEDIUM_DELAY_MS);
745	<	t2.join(MEDIUM_DELAY_MS);
585	<	assertTrue(!t1.isAlive());
586	<	assertTrue(!t2.isAlive());
744	>	awaitTermination(t1);
745	>	awaitTermination(t2);
746		}
747
589	–
748		/**
749		* Read tryLock succeeds if readlocked but not writelocked
750		*/
751	<	public void testTryLockWhenReadLocked() throws InterruptedException {
752	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
751	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
752	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
753	>	public void testTryLockWhenReadLocked(boolean fair) {
754	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
755		lock.readLock().lock();
756	<	Thread t = new Thread(new CheckedRunnable() {
756	>	Thread t = newStartedThread(new CheckedRunnable() {
757		public void realRun() {
758		assertTrue(lock.readLock().tryLock());
759		lock.readLock().unlock();
760		}});
761
762	<	t.start();
603	<	t.join();
762	>	awaitTermination(t);
763		lock.readLock().unlock();
764		}
765
607	–
608	–
766		/**
767		* write tryLock fails when readlocked
768		*/
769	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
770	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
769	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
770	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
771	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
772	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
773		lock.readLock().lock();
774	<	Thread t = new Thread(new CheckedRunnable() {
774	>	Thread t = newStartedThread(new CheckedRunnable() {
775		public void realRun() {
776		assertFalse(lock.writeLock().tryLock());
777		}});
778
779	<	t.start();
621	<	t.join();
779	>	awaitTermination(t);
780		lock.readLock().unlock();
781		}
782
625	–
626	–	/**
627	–	* Fair Read tryLock succeeds if readlocked but not writelocked
628	–	*/
629	–	public void testTryLockWhenReadLockedFair() throws InterruptedException {
630	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
631	–	lock.readLock().lock();
632	–	Thread t = new Thread(new CheckedRunnable() {
633	–	public void realRun() {
634	–	assertTrue(lock.readLock().tryLock());
635	–	lock.readLock().unlock();
636	–	}});
637	–
638	–	t.start();
639	–	t.join();
640	–	lock.readLock().unlock();
641	–	}
642	–
643	–
644	–
645	–	/**
646	–	* Fair write tryLock fails when readlocked
647	–	*/
648	–	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
649	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
650	–	lock.readLock().lock();
651	–	Thread t = new Thread(new CheckedRunnable() {
652	–	public void realRun() {
653	–	assertFalse(lock.writeLock().tryLock());
654	–	}});
655	–
656	–	t.start();
657	–	t.join();
658	–	lock.readLock().unlock();
659	–	}
660	–
661	–
662	–
783		/**
784		* write timed tryLock times out if locked
785		*/
786	<	public void testWriteTryLock_Timeout() throws InterruptedException {
787	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
786	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
787	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
788	>	public void testWriteTryLock_Timeout(boolean fair) {
789	>	final PublicReentrantReadWriteLock lock =
790	>	new PublicReentrantReadWriteLock(fair);
791	>	final long timeoutMillis = timeoutMillis();
792		lock.writeLock().lock();
793	<	Thread t = new Thread(new CheckedRunnable() {
793	>	Thread t = newStartedThread(new CheckedRunnable() {
794		public void realRun() throws InterruptedException {
795	<	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
795	>	long startTime = System.nanoTime();
796	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
797	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
798		}});
799
800	<	t.start();
801	<	t.join();
676	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
677	<	lock.writeLock().unlock();
800	>	awaitTermination(t);
801	>	releaseWriteLock(lock);
802		}
803
804		/**
805		* read timed tryLock times out if write-locked
806		*/
807	<	public void testReadTryLock_Timeout() throws InterruptedException {
808	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
807	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
808	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
809	>	public void testReadTryLock_Timeout(boolean fair) {
810	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
811		lock.writeLock().lock();
812	<	Thread t = new Thread(new CheckedRunnable() {
812	>	Thread t = newStartedThread(new CheckedRunnable() {
813		public void realRun() throws InterruptedException {
814	<	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
814	>	long startTime = System.nanoTime();
815	>	long timeoutMillis = timeoutMillis();
816	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
817	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
818		}});
819
820	<	t.start();
692	<	t.join();
820	>	awaitTermination(t);
821		assertTrue(lock.writeLock().isHeldByCurrentThread());
822		lock.writeLock().unlock();
823		}
824
697	–
825		/**
826	<	* write lockInterruptibly succeeds if lock free else is interruptible
826	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
827		*/
828	<	public void testWriteLockInterruptibly() throws InterruptedException {
829	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
830	<	lock.writeLock().lockInterruptibly();
831	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
828	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
829	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
830	>	public void testWriteLockInterruptibly(boolean fair) {
831	>	final PublicReentrantReadWriteLock lock =
832	>	new PublicReentrantReadWriteLock(fair);
833	>	try {
834	>	lock.writeLock().lockInterruptibly();
835	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
836	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
837		public void realRun() throws InterruptedException {
838		lock.writeLock().lockInterruptibly();
839		}});
840
841	<	t.start();
710	<	Thread.sleep(SHORT_DELAY_MS);
841	>	waitForQueuedThread(lock, t);
842		t.interrupt();
843	<	Thread.sleep(SHORT_DELAY_MS);
844	<	t.join();
845	<	lock.writeLock().unlock();
843	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
844	>	awaitTermination(t);
845	>	releaseWriteLock(lock);
846		}
847
848		/**
849	<	*  read lockInterruptibly succeeds if lock free else is interruptible
849	>	* read lockInterruptibly succeeds if lock free else is interruptible
850		*/
851	<	public void testReadLockInterruptibly() throws InterruptedException {
852	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
853	<	lock.writeLock().lockInterruptibly();
854	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
851	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
852	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
853	>	public void testReadLockInterruptibly(boolean fair) {
854	>	final PublicReentrantReadWriteLock lock =
855	>	new PublicReentrantReadWriteLock(fair);
856	>	try {
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859	>	lock.writeLock().lockInterruptibly();
860	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
861	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
862		public void realRun() throws InterruptedException {
863		lock.readLock().lockInterruptibly();
864		}});
865
866	<	t.start();
729	<	Thread.sleep(SHORT_DELAY_MS);
866	>	waitForQueuedThread(lock, t);
867		t.interrupt();
868	<	t.join();
869	<	lock.writeLock().unlock();
868	>	awaitTermination(t);
869	>	releaseWriteLock(lock);
870		}
871
872		/**
873		* Calling await without holding lock throws IllegalMonitorStateException
874		*/
875	<	public void testAwait_IllegalMonitor() throws InterruptedException {
876	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
875	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
876	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
877	>	public void testAwait_IMSE(boolean fair) {
878	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
879	>	final Condition c = lock.writeLock().newCondition();
880	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
881	>	long startTime = System.nanoTime();
882	>	try {
883	>	await(c, awaitMethod);
884	>	shouldThrow();
885	>	} catch (IllegalMonitorStateException success) {
886	>	} catch (InterruptedException fail) {
887	>	threadUnexpectedException(fail);
888	>	}
889	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
890	>	}
891	>	}
892	>
893	>	/**
894	>	* Calling signal without holding lock throws IllegalMonitorStateException
895	>	*/
896	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
897	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
898	>	public void testSignal_IMSE(boolean fair) {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
900		final Condition c = lock.writeLock().newCondition();
901		try {
902	<	c.await();
902	>	c.signal();
903		shouldThrow();
904		} catch (IllegalMonitorStateException success) {}
905		}
906
907		/**
908	<	* Calling signal without holding lock throws IllegalMonitorStateException
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909		*/
910	<	public void testSignal_IllegalMonitor() {
911	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
910	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
911	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
912	>	public void testSignalAll_IMSE(boolean fair) {
913	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
914		final Condition c = lock.writeLock().newCondition();
915		try {
916	<	c.signal();
916	>	c.signalAll();
917		shouldThrow();
918		} catch (IllegalMonitorStateException success) {}
919		}
#	Line 759 | Line 921 | public class ReentrantReadWriteLockTest
921		/**
922		* awaitNanos without a signal times out
923		*/
924	<	public void testAwaitNanos_Timeout() throws InterruptedException {
925	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
924	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
925	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
926	>	public void testAwaitNanos_Timeout(boolean fair) {
927	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
928		final Condition c = lock.writeLock().newCondition();
929	<
929	>	final long timeoutMillis = timeoutMillis();
930		lock.writeLock().lock();
931	<	long t = c.awaitNanos(100);
932	<	assertTrue(t <= 0);
931	>	final long startTime = System.nanoTime();
932	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	>	try {
934	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
935	>	assertTrue(nanosRemaining <= 0);
936	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
937	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
938		lock.writeLock().unlock();
939		}
940
772	–
941		/**
942	<	*  timed await without a signal times out
942	>	* timed await without a signal times out
943		*/
944	<	public void testAwait_Timeout() throws InterruptedException {
945	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
944	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
945	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
946	>	public void testAwait_Timeout(boolean fair) {
947	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
948		final Condition c = lock.writeLock().newCondition();
949	+	final long timeoutMillis = timeoutMillis();
950		lock.writeLock().lock();
951	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
951	>	final long startTime = System.nanoTime();
952	>	try {
953	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
954	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
955	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
956		lock.writeLock().unlock();
957		}
958
959		/**
960		* awaitUntil without a signal times out
961		*/
962	<	public void testAwaitUntil_Timeout() throws InterruptedException {
963	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
962	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
963	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
964	>	public void testAwaitUntil_Timeout(boolean fair) {
965	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
966		final Condition c = lock.writeLock().newCondition();
967		lock.writeLock().lock();
968	<	java.util.Date d = new java.util.Date();
969	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
968	>	// We shouldn't assume that nanoTime and currentTimeMillis
969	>	// use the same time source, so don't use nanoTime here.
970	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
971	>	try {
972	>	assertFalse(c.awaitUntil(delayedDate));
973	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
974	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
975		lock.writeLock().unlock();
976		}
977
978		/**
979		* await returns when signalled
980		*/
981	<	public void testAwait() throws InterruptedException {
982	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
981	>	public void testAwait()      { testAwait(false); }
982	>	public void testAwait_fair() { testAwait(true); }
983	>	public void testAwait(boolean fair) {
984	>	final PublicReentrantReadWriteLock lock =
985	>	new PublicReentrantReadWriteLock(fair);
986		final Condition c = lock.writeLock().newCondition();
987	<	Thread t = new Thread(new CheckedRunnable() {
987	>	final CountDownLatch locked = new CountDownLatch(1);
988	>	Thread t = newStartedThread(new CheckedRunnable() {
989		public void realRun() throws InterruptedException {
990		lock.writeLock().lock();
991	+	locked.countDown();
992		c.await();
993		lock.writeLock().unlock();
994		}});
995
996	<	t.start();
810	<	Thread.sleep(SHORT_DELAY_MS);
996	>	await(locked);
997		lock.writeLock().lock();
998	+	assertHasWaiters(lock, c, t);
999		c.signal();
1000	+	assertHasNoWaiters(lock, c);
1001	+	assertTrue(t.isAlive());
1002		lock.writeLock().unlock();
1003	<	t.join(SHORT_DELAY_MS);
815	<	assertFalse(t.isAlive());
816	<	}
817	<
818	<	/** A helper class for uninterruptible wait tests */
819	<	class UninterruptableThread extends Thread {
820	<	private Lock lock;
821	<	private Condition c;
822	<
823	<	public volatile boolean canAwake = false;
824	<	public volatile boolean interrupted = false;
825	<	public volatile boolean lockStarted = false;
826	<
827	<	public UninterruptableThread(Lock lock, Condition c) {
828	<	this.lock = lock;
829	<	this.c = c;
830	<	}
831	<
832	<	public synchronized void run() {
833	<	lock.lock();
834	<	lockStarted = true;
835	<
836	<	while (!canAwake) {
837	<	c.awaitUninterruptibly();
838	<	}
839	<
840	<	interrupted = isInterrupted();
841	<	lock.unlock();
842	<	}
1003	>	awaitTermination(t);
1004		}
1005
1006		/**
1007	<	* awaitUninterruptibly doesn't abort on interrupt
1007	>	* awaitUninterruptibly is uninterruptible
1008		*/
1009	<	public void testAwaitUninterruptibly() throws InterruptedException {
1010	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1011	<	final Condition c = lock.writeLock().newCondition();
1012	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1009	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1010	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1011	>	public void testAwaitUninterruptibly(boolean fair) {
1012	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1013	>	final Condition condition = lock.newCondition();
1014	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1015
1016	<	thread.start();
1016	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	>	public void realRun() {
1018	>	// Interrupt before awaitUninterruptibly
1019	>	lock.lock();
1020	>	pleaseInterrupt.countDown();
1021	>	Thread.currentThread().interrupt();
1022	>	condition.awaitUninterruptibly();
1023	>	assertTrue(Thread.interrupted());
1024	>	lock.unlock();
1025	>	}});
1026
1027	<	while (!thread.lockStarted) {
1028	<	Thread.sleep(100);
1029	<	}
1027	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1028	>	public void realRun() {
1029	>	// Interrupt during awaitUninterruptibly
1030	>	lock.lock();
1031	>	pleaseInterrupt.countDown();
1032	>	condition.awaitUninterruptibly();
1033	>	assertTrue(Thread.interrupted());
1034	>	lock.unlock();
1035	>	}});
1036
1037	<	lock.writeLock().lock();
1038	<	try {
1039	<	thread.interrupt();
1040	<	thread.canAwake = true;
1041	<	c.signal();
1042	<	} finally {
865	<	lock.writeLock().unlock();
866	<	}
1037	>	await(pleaseInterrupt);
1038	>	t2.interrupt();
1039	>	lock.lock();
1040	>	lock.unlock();
1041	>	assertThreadBlocks(t1, Thread.State.WAITING);
1042	>	assertThreadBlocks(t2, Thread.State.WAITING);
1043
1044	<	thread.join();
1045	<	assertTrue(thread.interrupted);
1046	<	assertFalse(thread.isAlive());
1044	>	lock.lock();
1045	>	condition.signalAll();
1046	>	lock.unlock();
1047	>
1048	>	awaitTermination(t1);
1049	>	awaitTermination(t2);
1050		}
1051
1052		/**
1053	<	* await is interruptible
1053	>	* await/awaitNanos/awaitUntil is interruptible
1054		*/
1055	<	public void testAwait_Interrupt() throws InterruptedException {
1056	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1055	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1056	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1057	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1058	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1059	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1060	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1061	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1062	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1063	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1064	>	final PublicReentrantReadWriteLock lock =
1065	>	new PublicReentrantReadWriteLock(fair);
1066		final Condition c = lock.writeLock().newCondition();
1067	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1067	>	final CountDownLatch locked = new CountDownLatch(1);
1068	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1069		public void realRun() throws InterruptedException {
1070		lock.writeLock().lock();
1071	<	c.await();
1072	<	lock.writeLock().unlock();
1071	>	assertWriteLockedByMoi(lock);
1072	>	assertHasNoWaiters(lock, c);
1073	>	locked.countDown();
1074	>	try {
1075	>	await(c, awaitMethod);
1076	>	} finally {
1077	>	assertWriteLockedByMoi(lock);
1078	>	assertHasNoWaiters(lock, c);
1079	>	lock.writeLock().unlock();
1080	>	assertFalse(Thread.interrupted());
1081	>	}
1082		}});
1083
1084	<	t.start();
1085	<	Thread.sleep(SHORT_DELAY_MS);
1084	>	await(locked);
1085	>	assertHasWaiters(lock, c, t);
1086		t.interrupt();
1087	<	t.join(SHORT_DELAY_MS);
1088	<	assertFalse(t.isAlive());
1087	>	awaitTermination(t);
1088	>	assertNotWriteLocked(lock);
1089		}
1090
1091		/**
1092	<	* awaitNanos is interruptible
1092	>	* signalAll wakes up all threads
1093		*/
1094	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1095	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1094	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1095	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1096	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1097	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1098	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1099	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1100	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1101	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1102	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1103	>	final PublicReentrantReadWriteLock lock =
1104	>	new PublicReentrantReadWriteLock(fair);
1105		final Condition c = lock.writeLock().newCondition();
1106	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1106	>	final CountDownLatch locked = new CountDownLatch(2);
1107	>	final Lock writeLock = lock.writeLock();
1108	>	class Awaiter extends CheckedRunnable {
1109		public void realRun() throws InterruptedException {
1110	<	lock.writeLock().lock();
1111	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1112	<	lock.writeLock().unlock();
1113	<	}});
1110	>	writeLock.lock();
1111	>	locked.countDown();
1112	>	await(c, awaitMethod);
1113	>	writeLock.unlock();
1114	>	}
1115	>	}
1116
1117	<	t.start();
1118	<	Thread.sleep(SHORT_DELAY_MS);
1119	<	t.interrupt();
1120	<	t.join(SHORT_DELAY_MS);
1121	<	assertFalse(t.isAlive());
1117	>	Thread t1 = newStartedThread(new Awaiter());
1118	>	Thread t2 = newStartedThread(new Awaiter());
1119	>
1120	>	await(locked);
1121	>	writeLock.lock();
1122	>	assertHasWaiters(lock, c, t1, t2);
1123	>	c.signalAll();
1124	>	assertHasNoWaiters(lock, c);
1125	>	writeLock.unlock();
1126	>	awaitTermination(t1);
1127	>	awaitTermination(t2);
1128		}
1129
1130		/**
1131	<	* awaitUntil is interruptible
1131	>	* signal wakes up waiting threads in FIFO order
1132		*/
1133	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1134	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1133	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1134	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1135	>	public void testSignalWakesFifo(boolean fair) {
1136	>	final PublicReentrantReadWriteLock lock =
1137	>	new PublicReentrantReadWriteLock(fair);
1138		final Condition c = lock.writeLock().newCondition();
1139	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1139	>	final CountDownLatch locked1 = new CountDownLatch(1);
1140	>	final CountDownLatch locked2 = new CountDownLatch(1);
1141	>	final Lock writeLock = lock.writeLock();
1142	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1143		public void realRun() throws InterruptedException {
1144	<	lock.writeLock().lock();
1145	<	java.util.Date d = new java.util.Date();
1146	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1147	<	lock.writeLock().unlock();
1144	>	writeLock.lock();
1145	>	locked1.countDown();
1146	>	c.await();
1147	>	writeLock.unlock();
1148		}});
1149
1150	<	t.start();
1151	<	Thread.sleep(SHORT_DELAY_MS);
1152	<	t.interrupt();
1153	<	t.join(SHORT_DELAY_MS);
1154	<	assertFalse(t.isAlive());
1150	>	await(locked1);
1151	>
1152	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1153	>	public void realRun() throws InterruptedException {
1154	>	writeLock.lock();
1155	>	locked2.countDown();
1156	>	c.await();
1157	>	writeLock.unlock();
1158	>	}});
1159	>
1160	>	await(locked2);
1161	>
1162	>	writeLock.lock();
1163	>	assertHasWaiters(lock, c, t1, t2);
1164	>	assertFalse(lock.hasQueuedThreads());
1165	>	c.signal();
1166	>	assertHasWaiters(lock, c, t2);
1167	>	assertTrue(lock.hasQueuedThread(t1));
1168	>	assertFalse(lock.hasQueuedThread(t2));
1169	>	c.signal();
1170	>	assertHasNoWaiters(lock, c);
1171	>	assertTrue(lock.hasQueuedThread(t1));
1172	>	assertTrue(lock.hasQueuedThread(t2));
1173	>	writeLock.unlock();
1174	>	awaitTermination(t1);
1175	>	awaitTermination(t2);
1176		}
1177
1178		/**
1179	<	* signalAll wakes up all threads
1180	<	*/
1181	<	public void testSignalAll() throws InterruptedException {
1182	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1179	>	* await after multiple reentrant locking preserves lock count
1180	>	*/
1181	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1182	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1183	>	public void testAwaitLockCount(boolean fair) {
1184	>	final PublicReentrantReadWriteLock lock =
1185	>	new PublicReentrantReadWriteLock(fair);
1186		final Condition c = lock.writeLock().newCondition();
1187	<	Thread t1 = new Thread(new CheckedRunnable() {
1187	>	final CountDownLatch locked = new CountDownLatch(2);
1188	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1189		public void realRun() throws InterruptedException {
1190		lock.writeLock().lock();
1191	+	assertWriteLockedByMoi(lock);
1192	+	assertEquals(1, lock.writeLock().getHoldCount());
1193	+	locked.countDown();
1194		c.await();
1195	+	assertWriteLockedByMoi(lock);
1196	+	assertEquals(1, lock.writeLock().getHoldCount());
1197		lock.writeLock().unlock();
1198		}});
1199
1200	<	Thread t2 = new Thread(new CheckedRunnable() {
1200	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1201		public void realRun() throws InterruptedException {
1202		lock.writeLock().lock();
1203	+	lock.writeLock().lock();
1204	+	assertWriteLockedByMoi(lock);
1205	+	assertEquals(2, lock.writeLock().getHoldCount());
1206	+	locked.countDown();
1207		c.await();
1208	+	assertWriteLockedByMoi(lock);
1209	+	assertEquals(2, lock.writeLock().getHoldCount());
1210	+	lock.writeLock().unlock();
1211		lock.writeLock().unlock();
1212		}});
1213
1214	<	t1.start();
955	<	t2.start();
956	<	Thread.sleep(SHORT_DELAY_MS);
1214	>	await(locked);
1215		lock.writeLock().lock();
1216	+	assertHasWaiters(lock, c, t1, t2);
1217		c.signalAll();
1218	+	assertHasNoWaiters(lock, c);
1219		lock.writeLock().unlock();
1220	<	t1.join(SHORT_DELAY_MS);
1221	<	t2.join(SHORT_DELAY_MS);
962	<	assertFalse(t1.isAlive());
963	<	assertFalse(t2.isAlive());
1220	>	awaitTermination(t1);
1221	>	awaitTermination(t2);
1222		}
1223
1224		/**
1225		* A serialized lock deserializes as unlocked
1226		*/
1227	<	public void testSerialization() throws Exception {
1228	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1229	<	l.readLock().lock();
1230	<	l.readLock().unlock();
1231	<
1232	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1233	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1234	<	out.writeObject(l);
1235	<	out.close();
1236	<
1237	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1238	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1239	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1240	<	r.readLock().lock();
1241	<	r.readLock().unlock();
1227	>	public void testSerialization()      { testSerialization(false); }
1228	>	public void testSerialization_fair() { testSerialization(true); }
1229	>	public void testSerialization(boolean fair) {
1230	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1231	>	lock.writeLock().lock();
1232	>	lock.readLock().lock();
1233	>
1234	>	ReentrantReadWriteLock clone = serialClone(lock);
1235	>	assertEquals(lock.isFair(), clone.isFair());
1236	>	assertTrue(lock.isWriteLocked());
1237	>	assertFalse(clone.isWriteLocked());
1238	>	assertEquals(1, lock.getReadLockCount());
1239	>	assertEquals(0, clone.getReadLockCount());
1240	>	clone.writeLock().lock();
1241	>	clone.readLock().lock();
1242	>	assertTrue(clone.isWriteLocked());
1243	>	assertEquals(1, clone.getReadLockCount());
1244	>	clone.readLock().unlock();
1245	>	clone.writeLock().unlock();
1246	>	assertFalse(clone.isWriteLocked());
1247	>	assertEquals(1, lock.getReadLockCount());
1248	>	assertEquals(0, clone.getReadLockCount());
1249		}
1250
1251		/**
1252		* hasQueuedThreads reports whether there are waiting threads
1253		*/
1254	<	public void testhasQueuedThreads() throws InterruptedException {
1255	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1254	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1255	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1256	>	public void testHasQueuedThreads(boolean fair) {
1257	>	final PublicReentrantReadWriteLock lock =
1258	>	new PublicReentrantReadWriteLock(fair);
1259		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1260		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1261		assertFalse(lock.hasQueuedThreads());
1262		lock.writeLock().lock();
1263	+	assertFalse(lock.hasQueuedThreads());
1264		t1.start();
1265	<	Thread.sleep(SHORT_DELAY_MS);
1265	>	waitForQueuedThread(lock, t1);
1266		assertTrue(lock.hasQueuedThreads());
1267		t2.start();
1268	<	Thread.sleep(SHORT_DELAY_MS);
1268	>	waitForQueuedThread(lock, t2);
1269		assertTrue(lock.hasQueuedThreads());
1270		t1.interrupt();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1271	>	awaitTermination(t1);
1272		assertTrue(lock.hasQueuedThreads());
1273		lock.writeLock().unlock();
1274	<	Thread.sleep(SHORT_DELAY_MS);
1274	>	awaitTermination(t2);
1275		assertFalse(lock.hasQueuedThreads());
1007	–	t1.join();
1008	–	t2.join();
1276		}
1277
1278		/**
1279		* hasQueuedThread(null) throws NPE
1280		*/
1281	<	public void testHasQueuedThreadNPE() {
1282	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1281	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1282	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1283	>	public void testHasQueuedThreadNPE(boolean fair) {
1284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1285		try {
1286	<	sync.hasQueuedThread(null);
1286	>	lock.hasQueuedThread(null);
1287		shouldThrow();
1288		} catch (NullPointerException success) {}
1289		}
1290
1291		/**
1292	<	* hasQueuedThread reports whether a thread is queued.
1292	>	* hasQueuedThread reports whether a thread is queued
1293		*/
1294	<	public void testHasQueuedThread() throws InterruptedException {
1295	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1296	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1297	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1298	<	assertFalse(sync.hasQueuedThread(t1));
1299	<	assertFalse(sync.hasQueuedThread(t2));
1300	<	sync.writeLock().lock();
1294	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1295	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1296	>	public void testHasQueuedThread(boolean fair) {
1297	>	final PublicReentrantReadWriteLock lock =
1298	>	new PublicReentrantReadWriteLock(fair);
1299	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1300	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1301	>	assertFalse(lock.hasQueuedThread(t1));
1302	>	assertFalse(lock.hasQueuedThread(t2));
1303	>	lock.writeLock().lock();
1304		t1.start();
1305	<	Thread.sleep(SHORT_DELAY_MS);
1306	<	assertTrue(sync.hasQueuedThread(t1));
1305	>	waitForQueuedThread(lock, t1);
1306	>	assertTrue(lock.hasQueuedThread(t1));
1307	>	assertFalse(lock.hasQueuedThread(t2));
1308		t2.start();
1309	<	Thread.sleep(SHORT_DELAY_MS);
1310	<	assertTrue(sync.hasQueuedThread(t1));
1311	<	assertTrue(sync.hasQueuedThread(t2));
1309	>	waitForQueuedThread(lock, t2);
1310	>	assertTrue(lock.hasQueuedThread(t1));
1311	>	assertTrue(lock.hasQueuedThread(t2));
1312		t1.interrupt();
1313	<	Thread.sleep(SHORT_DELAY_MS);
1314	<	assertFalse(sync.hasQueuedThread(t1));
1315	<	assertTrue(sync.hasQueuedThread(t2));
1316	<	sync.writeLock().unlock();
1317	<	Thread.sleep(SHORT_DELAY_MS);
1318	<	assertFalse(sync.hasQueuedThread(t1));
1319	<	Thread.sleep(SHORT_DELAY_MS);
1047	<	assertFalse(sync.hasQueuedThread(t2));
1048	<	t1.join();
1049	<	t2.join();
1313	>	awaitTermination(t1);
1314	>	assertFalse(lock.hasQueuedThread(t1));
1315	>	assertTrue(lock.hasQueuedThread(t2));
1316	>	lock.writeLock().unlock();
1317	>	awaitTermination(t2);
1318	>	assertFalse(lock.hasQueuedThread(t1));
1319	>	assertFalse(lock.hasQueuedThread(t2));
1320		}
1321
1052	–
1322		/**
1323		* getQueueLength reports number of waiting threads
1324		*/
1325	<	public void testGetQueueLength() throws InterruptedException {
1326	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1325	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1326	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1327	>	public void testGetQueueLength(boolean fair) {
1328	>	final PublicReentrantReadWriteLock lock =
1329	>	new PublicReentrantReadWriteLock(fair);
1330		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1331		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1332		assertEquals(0, lock.getQueueLength());
1333		lock.writeLock().lock();
1334		t1.start();
1335	<	Thread.sleep(SHORT_DELAY_MS);
1335	>	waitForQueuedThread(lock, t1);
1336		assertEquals(1, lock.getQueueLength());
1337		t2.start();
1338	<	Thread.sleep(SHORT_DELAY_MS);
1338	>	waitForQueuedThread(lock, t2);
1339		assertEquals(2, lock.getQueueLength());
1340		t1.interrupt();
1341	<	Thread.sleep(SHORT_DELAY_MS);
1341	>	awaitTermination(t1);
1342		assertEquals(1, lock.getQueueLength());
1343		lock.writeLock().unlock();
1344	<	Thread.sleep(SHORT_DELAY_MS);
1344	>	awaitTermination(t2);
1345		assertEquals(0, lock.getQueueLength());
1074	–	t1.join();
1075	–	t2.join();
1346		}
1347
1348		/**
1349		* getQueuedThreads includes waiting threads
1350		*/
1351	<	public void testGetQueuedThreads() throws InterruptedException {
1352	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1351	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1352	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1353	>	public void testGetQueuedThreads(boolean fair) {
1354	>	final PublicReentrantReadWriteLock lock =
1355	>	new PublicReentrantReadWriteLock(fair);
1356		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1357		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1358		assertTrue(lock.getQueuedThreads().isEmpty());
1359		lock.writeLock().lock();
1360		assertTrue(lock.getQueuedThreads().isEmpty());
1361		t1.start();
1362	<	Thread.sleep(SHORT_DELAY_MS);
1362	>	waitForQueuedThread(lock, t1);
1363	>	assertEquals(1, lock.getQueuedThreads().size());
1364		assertTrue(lock.getQueuedThreads().contains(t1));
1365		t2.start();
1366	<	Thread.sleep(SHORT_DELAY_MS);
1366	>	waitForQueuedThread(lock, t2);
1367	>	assertEquals(2, lock.getQueuedThreads().size());
1368		assertTrue(lock.getQueuedThreads().contains(t1));
1369		assertTrue(lock.getQueuedThreads().contains(t2));
1370		t1.interrupt();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1371	>	awaitTermination(t1);
1372		assertFalse(lock.getQueuedThreads().contains(t1));
1373		assertTrue(lock.getQueuedThreads().contains(t2));
1374	+	assertEquals(1, lock.getQueuedThreads().size());
1375		lock.writeLock().unlock();
1376	<	Thread.sleep(SHORT_DELAY_MS);
1376	>	awaitTermination(t2);
1377		assertTrue(lock.getQueuedThreads().isEmpty());
1102	–	t1.join();
1103	–	t2.join();
1378		}
1379
1380		/**
1381		* hasWaiters throws NPE if null
1382		*/
1383	<	public void testHasWaitersNPE() {
1384	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1383	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1384	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1385	>	public void testHasWaitersNPE(boolean fair) {
1386	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1387		try {
1388		lock.hasWaiters(null);
1389		shouldThrow();
#	Line 1117 | Line 1393 | public class ReentrantReadWriteLockTest
1393		/**
1394		* getWaitQueueLength throws NPE if null
1395		*/
1396	<	public void testGetWaitQueueLengthNPE() {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1396	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1397	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1398	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1399	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1400		try {
1401		lock.getWaitQueueLength(null);
1402		shouldThrow();
1403		} catch (NullPointerException success) {}
1404		}
1405
1128	–
1406		/**
1407		* getWaitingThreads throws NPE if null
1408		*/
1409	<	public void testGetWaitingThreadsNPE() {
1410	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1409	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1410	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1411	>	public void testGetWaitingThreadsNPE(boolean fair) {
1412	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1413		try {
1414		lock.getWaitingThreads(null);
1415		shouldThrow();
#	Line 1138 | Line 1417 | public class ReentrantReadWriteLockTest
1417		}
1418
1419		/**
1420	<	* hasWaiters throws IAE if not owned
1420	>	* hasWaiters throws IllegalArgumentException if not owned
1421		*/
1422	<	public void testHasWaitersIAE() {
1423	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1422	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1423	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1424	>	public void testHasWaitersIAE(boolean fair) {
1425	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1426		final Condition c = lock.writeLock().newCondition();
1427	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1427	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1428		try {
1429		lock2.hasWaiters(c);
1430		shouldThrow();
#	Line 1151 | Line 1432 | public class ReentrantReadWriteLockTest
1432		}
1433
1434		/**
1435	<	* hasWaiters throws IMSE if not locked
1435	>	* hasWaiters throws IllegalMonitorStateException if not locked
1436		*/
1437	<	public void testHasWaitersIMSE() {
1438	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1437	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1438	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1439	>	public void testHasWaitersIMSE(boolean fair) {
1440	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1441		final Condition c = lock.writeLock().newCondition();
1442		try {
1443		lock.hasWaiters(c);
#	Line 1162 | Line 1445 | public class ReentrantReadWriteLockTest
1445		} catch (IllegalMonitorStateException success) {}
1446		}
1447
1165	–
1448		/**
1449	<	* getWaitQueueLength throws IAE if not owned
1449	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1450		*/
1451	<	public void testGetWaitQueueLengthIAE() {
1452	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1451	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1452	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1453	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1454	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1455		final Condition c = lock.writeLock().newCondition();
1456	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1456	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1457		try {
1458		lock2.getWaitQueueLength(c);
1459		shouldThrow();
#	Line 1177 | Line 1461 | public class ReentrantReadWriteLockTest
1461		}
1462
1463		/**
1464	<	* getWaitQueueLength throws IMSE if not locked
1464	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1465		*/
1466	<	public void testGetWaitQueueLengthIMSE() {
1467	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1466	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1467	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1468	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1469	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1470		final Condition c = lock.writeLock().newCondition();
1471		try {
1472		lock.getWaitQueueLength(c);
#	Line 1188 | Line 1474 | public class ReentrantReadWriteLockTest
1474		} catch (IllegalMonitorStateException success) {}
1475		}
1476
1191	–
1477		/**
1478	<	* getWaitingThreads throws IAE if not owned
1478	>	* getWaitingThreads throws IllegalArgumentException if not owned
1479		*/
1480	<	public void testGetWaitingThreadsIAE() {
1481	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1480	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1481	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1482	>	public void testGetWaitingThreadsIAE(boolean fair) {
1483	>	final PublicReentrantReadWriteLock lock =
1484	>	new PublicReentrantReadWriteLock(fair);
1485		final Condition c = lock.writeLock().newCondition();
1486	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1486	>	final PublicReentrantReadWriteLock lock2 =
1487	>	new PublicReentrantReadWriteLock(fair);
1488		try {
1489		lock2.getWaitingThreads(c);
1490		shouldThrow();
#	Line 1203 | Line 1492 | public class ReentrantReadWriteLockTest
1492		}
1493
1494		/**
1495	<	* getWaitingThreads throws IMSE if not locked
1495	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1496		*/
1497	<	public void testGetWaitingThreadsIMSE() {
1498	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1497	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1498	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1499	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1500	>	final PublicReentrantReadWriteLock lock =
1501	>	new PublicReentrantReadWriteLock(fair);
1502		final Condition c = lock.writeLock().newCondition();
1503		try {
1504		lock.getWaitingThreads(c);
#	Line 1214 | Line 1506 | public class ReentrantReadWriteLockTest
1506		} catch (IllegalMonitorStateException success) {}
1507		}
1508
1217	–
1509		/**
1510		* hasWaiters returns true when a thread is waiting, else false
1511		*/
1512	<	public void testHasWaiters() throws InterruptedException {
1513	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1512	>	public void testHasWaiters()      { testHasWaiters(false); }
1513	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1514	>	public void testHasWaiters(boolean fair) {
1515	>	final PublicReentrantReadWriteLock lock =
1516	>	new PublicReentrantReadWriteLock(fair);
1517		final Condition c = lock.writeLock().newCondition();
1518	<	Thread t = new Thread(new CheckedRunnable() {
1518	>	final CountDownLatch locked = new CountDownLatch(1);
1519	>	Thread t = newStartedThread(new CheckedRunnable() {
1520		public void realRun() throws InterruptedException {
1521		lock.writeLock().lock();
1522	+	assertHasNoWaiters(lock, c);
1523		assertFalse(lock.hasWaiters(c));
1524	<	assertEquals(0, lock.getWaitQueueLength(c));
1524	>	locked.countDown();
1525		c.await();
1526	+	assertHasNoWaiters(lock, c);
1527	+	assertFalse(lock.hasWaiters(c));
1528		lock.writeLock().unlock();
1529		}});
1530
1531	<	t.start();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1531	>	await(locked);
1532		lock.writeLock().lock();
1533	+	assertHasWaiters(lock, c, t);
1534		assertTrue(lock.hasWaiters(c));
1237	–	assertEquals(1, lock.getWaitQueueLength(c));
1535		c.signal();
1536	<	lock.writeLock().unlock();
1240	<	Thread.sleep(SHORT_DELAY_MS);
1241	<	lock.writeLock().lock();
1536	>	assertHasNoWaiters(lock, c);
1537		assertFalse(lock.hasWaiters(c));
1243	–	assertEquals(0, lock.getWaitQueueLength(c));
1538		lock.writeLock().unlock();
1539	<	t.join(SHORT_DELAY_MS);
1540	<	assertFalse(t.isAlive());
1539	>	awaitTermination(t);
1540	>	assertHasNoWaiters(lock, c);
1541		}
1542
1543		/**
1544		* getWaitQueueLength returns number of waiting threads
1545		*/
1546	<	public void testGetWaitQueueLength() throws InterruptedException {
1547	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1546	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1547	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1548	>	public void testGetWaitQueueLength(boolean fair) {
1549	>	final PublicReentrantReadWriteLock lock =
1550	>	new PublicReentrantReadWriteLock(fair);
1551		final Condition c = lock.writeLock().newCondition();
1552	<	Thread t = new Thread(new CheckedRunnable() {
1552	>	final CountDownLatch locked = new CountDownLatch(1);
1553	>	Thread t = newStartedThread(new CheckedRunnable() {
1554		public void realRun() throws InterruptedException {
1555		lock.writeLock().lock();
1258	–	assertFalse(lock.hasWaiters(c));
1556		assertEquals(0, lock.getWaitQueueLength(c));
1557	+	locked.countDown();
1558		c.await();
1559		lock.writeLock().unlock();
1560		}});
1561
1562	<	t.start();
1265	<	Thread.sleep(SHORT_DELAY_MS);
1562	>	await(locked);
1563		lock.writeLock().lock();
1564	<	assertTrue(lock.hasWaiters(c));
1564	>	assertHasWaiters(lock, c, t);
1565		assertEquals(1, lock.getWaitQueueLength(c));
1566		c.signal();
1567	<	lock.writeLock().unlock();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1272	<	lock.writeLock().lock();
1273	<	assertFalse(lock.hasWaiters(c));
1567	>	assertHasNoWaiters(lock, c);
1568		assertEquals(0, lock.getWaitQueueLength(c));
1569		lock.writeLock().unlock();
1570	<	t.join(SHORT_DELAY_MS);
1277	<	assertFalse(t.isAlive());
1570	>	awaitTermination(t);
1571		}
1572
1280	–
1573		/**
1574		* getWaitingThreads returns only and all waiting threads
1575		*/
1576	<	public void testGetWaitingThreads() throws InterruptedException {
1577	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1576	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1577	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1578	>	public void testGetWaitingThreads(boolean fair) {
1579	>	final PublicReentrantReadWriteLock lock =
1580	>	new PublicReentrantReadWriteLock(fair);
1581		final Condition c = lock.writeLock().newCondition();
1582	+	final CountDownLatch locked1 = new CountDownLatch(1);
1583	+	final CountDownLatch locked2 = new CountDownLatch(1);
1584		Thread t1 = new Thread(new CheckedRunnable() {
1585		public void realRun() throws InterruptedException {
1586		lock.writeLock().lock();
1587		assertTrue(lock.getWaitingThreads(c).isEmpty());
1588	+	locked1.countDown();
1589		c.await();
1590		lock.writeLock().unlock();
1591		}});
#	Line 1296 | Line 1594 | public class ReentrantReadWriteLockTest
1594		public void realRun() throws InterruptedException {
1595		lock.writeLock().lock();
1596		assertFalse(lock.getWaitingThreads(c).isEmpty());
1597	+	locked2.countDown();
1598		c.await();
1599		lock.writeLock().unlock();
1600		}});
#	Line 1303 | Line 1602 | public class ReentrantReadWriteLockTest
1602		lock.writeLock().lock();
1603		assertTrue(lock.getWaitingThreads(c).isEmpty());
1604		lock.writeLock().unlock();
1605	+
1606		t1.start();
1607	<	Thread.sleep(SHORT_DELAY_MS);
1607	>	await(locked1);
1608		t2.start();
1609	<	Thread.sleep(SHORT_DELAY_MS);
1609	>	await(locked2);
1610	>
1611		lock.writeLock().lock();
1612		assertTrue(lock.hasWaiters(c));
1613		assertTrue(lock.getWaitingThreads(c).contains(t1));
1614		assertTrue(lock.getWaitingThreads(c).contains(t2));
1615	+	assertEquals(2, lock.getWaitingThreads(c).size());
1616		c.signalAll();
1617	+	assertHasNoWaiters(lock, c);
1618		lock.writeLock().unlock();
1619	<	Thread.sleep(SHORT_DELAY_MS);
1620	<	lock.writeLock().lock();
1621	<	assertFalse(lock.hasWaiters(c));
1622	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1623	<	lock.writeLock().unlock();
1321	<	t1.join(SHORT_DELAY_MS);
1322	<	t2.join(SHORT_DELAY_MS);
1323	<	assertFalse(t1.isAlive());
1324	<	assertFalse(t2.isAlive());
1619	>
1620	>	awaitTermination(t1);
1621	>	awaitTermination(t2);
1622	>
1623	>	assertHasNoWaiters(lock, c);
1624		}
1625
1626		/**
1627		* toString indicates current lock state
1628		*/
1629	<	public void testToString() {
1630	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1631	<	String us = lock.toString();
1632	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1633	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1634	<	lock.writeLock().lock();
1635	<	String ws = lock.toString();
1636	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1637	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1629	>	public void testToString()      { testToString(false); }
1630	>	public void testToString_fair() { testToString(true); }
1631	>	public void testToString(boolean fair) {
1632	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1633	>	assertTrue(lock.toString().contains("Write locks = 0"));
1634	>	assertTrue(lock.toString().contains("Read locks = 0"));
1635	>	lock.writeLock().lock();
1636	>	assertTrue(lock.toString().contains("Write locks = 1"));
1637	>	assertTrue(lock.toString().contains("Read locks = 0"));
1638	>	lock.writeLock().lock();
1639	>	assertTrue(lock.toString().contains("Write locks = 2"));
1640	>	assertTrue(lock.toString().contains("Read locks = 0"));
1641	>	lock.writeLock().unlock();
1642		lock.writeLock().unlock();
1643		lock.readLock().lock();
1644	+	assertTrue(lock.toString().contains("Write locks = 0"));
1645	+	assertTrue(lock.toString().contains("Read locks = 1"));
1646		lock.readLock().lock();
1647	<	String rs = lock.toString();
1648	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1344	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1647	>	assertTrue(lock.toString().contains("Write locks = 0"));
1648	>	assertTrue(lock.toString().contains("Read locks = 2"));
1649		}
1650
1651		/**
1652		* readLock.toString indicates current lock state
1653		*/
1654	<	public void testReadLockToString() {
1655	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1656	<	String us = lock.readLock().toString();
1657	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1654	>	public void testReadLockToString()      { testReadLockToString(false); }
1655	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1656	>	public void testReadLockToString(boolean fair) {
1657	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1658	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1659		lock.readLock().lock();
1660	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1661		lock.readLock().lock();
1662	<	String rs = lock.readLock().toString();
1663	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1662	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1663	>	lock.readLock().unlock();
1664	>	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1665	>	lock.readLock().unlock();
1666	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1667		}
1668
1669		/**
1670		* writeLock.toString indicates current lock state
1671		*/
1672	<	public void testWriteLockToString() {
1673	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1674	<	String us = lock.writeLock().toString();
1675	<	assertTrue(us.indexOf("Unlocked") >= 0);
1672	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1673	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1674	>	public void testWriteLockToString(boolean fair) {
1675	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1676	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1677		lock.writeLock().lock();
1678	<	String ls = lock.writeLock().toString();
1679	<	assertTrue(ls.indexOf("Locked") >= 0);
1678	>	assertTrue(lock.writeLock().toString().contains("Locked by"));
1679	>	lock.writeLock().unlock();
1680	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1681		}
1682
1683		}

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