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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.39 by jsr166, Mon Nov 30 08:31:09 2009 UTC vs.
Revision 1.69 by jsr166, Wed Dec 31 19:05:43 2014 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	>	junit.textui.TestRunner.run(suite());
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	>	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	>	* 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	<	public void testLock() {
130	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84	<	rl.writeLock().lock();
85	<	assertTrue(rl.isWriteLocked());
86	<	assertTrue(rl.isWriteLockedByCurrentThread());
87	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
88	<	assertEquals(0, rl.getReadLockCount());
89	<	rl.writeLock().unlock();
90	<	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());
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	<	* locking an unlocked fair lock succeeds
142	<	*/
143	<	public void testFairLock() {
144	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
145	<	rl.writeLock().lock();
146	<	assertTrue(rl.isWriteLocked());
147	<	assertTrue(rl.isWriteLockedByCurrentThread());
148	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
149	<	assertEquals(0, rl.getReadLockCount());
150	<	rl.writeLock().unlock();
151	<	assertFalse(rl.isWriteLocked());
152	<	assertFalse(rl.isWriteLockedByCurrentThread());
153	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
154	<	assertEquals(0, rl.getReadLockCount());
155	<	rl.readLock().lock();
156	<	assertFalse(rl.isWriteLocked());
157	<	assertFalse(rl.isWriteLockedByCurrentThread());
158	<	assertEquals(1, rl.getReadLockCount());
159	<	rl.readLock().unlock();
160	<	assertFalse(rl.isWriteLocked());
161	<	assertFalse(rl.isWriteLockedByCurrentThread());
162	<	assertEquals(0, rl.getReadLockCount());
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 using the specified AwaitMethod.
159	>	*/
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	switch (awaitMethod) {
163	>	case await:
164	>	c.await();
165	>	break;
166	>	case awaitTimed:
167	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
168	>	break;
169	>	case awaitNanos:
170	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
171	>	assertTrue(nanosRemaining > 0);
172	>	break;
173	>	case awaitUntil:
174	>	java.util.Date d = new java.util.Date();
175	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
176	>	break;
177	>	}
178	>	}
179	>
180	>	/**
181	>	* Constructor sets given fairness, and is in unlocked state
182	>	*/
183	>	public void testConstructor() {
184	>	PublicReentrantReadWriteLock lock;
185	>
186	>	lock = new PublicReentrantReadWriteLock();
187	>	assertFalse(lock.isFair());
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>
191	>	lock = new PublicReentrantReadWriteLock(true);
192	>	assertTrue(lock.isFair());
193	>	assertNotWriteLocked(lock);
194	>	assertEquals(0, lock.getReadLockCount());
195	>
196	>	lock = new PublicReentrantReadWriteLock(false);
197	>	assertFalse(lock.isFair());
198	>	assertNotWriteLocked(lock);
199	>	assertEquals(0, lock.getReadLockCount());
200	>	}
201	>
202	>	/**
203	>	* write-locking and read-locking an unlocked lock succeed
204	>	*/
205	>	public void testLock()      { testLock(false); }
206	>	public void testLock_fair() { testLock(true); }
207	>	public void testLock(boolean fair) {
208	>	PublicReentrantReadWriteLock lock =
209	>	new PublicReentrantReadWriteLock(fair);
210	>	assertNotWriteLocked(lock);
211	>	lock.writeLock().lock();
212	>	assertWriteLockedByMoi(lock);
213	>	lock.writeLock().unlock();
214	>	assertNotWriteLocked(lock);
215	>	assertEquals(0, lock.getReadLockCount());
216	>	lock.readLock().lock();
217	>	assertNotWriteLocked(lock);
218	>	assertEquals(1, lock.getReadLockCount());
219	>	lock.readLock().unlock();
220	>	assertNotWriteLocked(lock);
221	>	assertEquals(0, lock.getReadLockCount());
222		}
223
224		/**
225		* getWriteHoldCount returns number of recursive holds
226		*/
227	<	public void testGetWriteHoldCount() {
228	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
227	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
228	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
229	>	public void testGetWriteHoldCount(boolean fair) {
230	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
231		for (int i = 1; i <= SIZE; i++) {
232		lock.writeLock().lock();
233		assertEquals(i,lock.getWriteHoldCount());
#	Line 143 | Line 239 | public class ReentrantReadWriteLockTest
239		}
240
241		/**
242	<	* WriteLock.getHoldCount returns number of recursive holds
242	>	* writelock.getHoldCount returns number of recursive holds
243		*/
244	<	public void testGetHoldCount() {
245	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
244	>	public void testGetHoldCount()      { testGetHoldCount(false); }
245	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
246	>	public void testGetHoldCount(boolean fair) {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
248		for (int i = 1; i <= SIZE; i++) {
249		lock.writeLock().lock();
250		assertEquals(i,lock.writeLock().getHoldCount());
#	Line 160 | Line 258 | public class ReentrantReadWriteLockTest
258		/**
259		* getReadHoldCount returns number of recursive holds
260		*/
261	<	public void testGetReadHoldCount() {
262	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
261	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
262	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
263	>	public void testGetReadHoldCount(boolean fair) {
264	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
265		for (int i = 1; i <= SIZE; i++) {
266		lock.readLock().lock();
267		assertEquals(i,lock.getReadHoldCount());
#	Line 172 | Line 272 | public class ReentrantReadWriteLockTest
272		}
273		}
274
175	–
275		/**
276		* write-unlocking an unlocked lock throws IllegalMonitorStateException
277		*/
278	<	public void testUnlock_IllegalMonitorStateException() {
279	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
278	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
279	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
280	>	public void testWriteUnlock_IMSE(boolean fair) {
281	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
282		try {
283	<	rl.writeLock().unlock();
283	>	lock.writeLock().unlock();
284		shouldThrow();
285		} catch (IllegalMonitorStateException success) {}
286		}
287
288	+	/**
289	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
290	+	*/
291	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
292	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
293	+	public void testReadUnlock_IMSE(boolean fair) {
294	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
295	+	try {
296	+	lock.readLock().unlock();
297	+	shouldThrow();
298	+	} catch (IllegalMonitorStateException success) {}
299	+	}
300
301		/**
302		* write-lockInterruptibly is interruptible
303		*/
304	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
305	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
306	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
304	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
305	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
306	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
307	>	final PublicReentrantReadWriteLock lock =
308	>	new PublicReentrantReadWriteLock(fair);
309	>	lock.writeLock().lock();
310	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311		public void realRun() throws InterruptedException {
312		lock.writeLock().lockInterruptibly();
196	–	lock.writeLock().unlock();
197	–	lock.writeLock().lockInterruptibly();
198	–	lock.writeLock().unlock();
313		}});
314
315	<	lock.writeLock().lock();
202	<	t.start();
203	<	Thread.sleep(SHORT_DELAY_MS);
315	>	waitForQueuedThread(lock, t);
316		t.interrupt();
317	<	Thread.sleep(SHORT_DELAY_MS);
318	<	lock.writeLock().unlock();
207	<	t.join();
317	>	awaitTermination(t);
318	>	releaseWriteLock(lock);
319		}
320
321		/**
322		* timed write-tryLock is interruptible
323		*/
324	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
325	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
324	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
325	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
326	>	public void testWriteTryLock_Interruptible(boolean fair) {
327	>	final PublicReentrantReadWriteLock lock =
328	>	new PublicReentrantReadWriteLock(fair);
329		lock.writeLock().lock();
330	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
330	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
331		public void realRun() throws InterruptedException {
332	<	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
332	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
333		}});
334
335	<	t.start();
222	<	Thread.sleep(SHORT_DELAY_MS);
335	>	waitForQueuedThread(lock, t);
336		t.interrupt();
337	<	lock.writeLock().unlock();
338	<	t.join();
337	>	awaitTermination(t);
338	>	releaseWriteLock(lock);
339		}
340
341		/**
342		* read-lockInterruptibly is interruptible
343		*/
344	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
345	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
344	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
345	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
346	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
347	>	final PublicReentrantReadWriteLock lock =
348	>	new PublicReentrantReadWriteLock(fair);
349		lock.writeLock().lock();
350	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
350	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
351		public void realRun() throws InterruptedException {
352		lock.readLock().lockInterruptibly();
353		}});
354
355	<	t.start();
240	<	Thread.sleep(SHORT_DELAY_MS);
355	>	waitForQueuedThread(lock, t);
356		t.interrupt();
357	<	Thread.sleep(SHORT_DELAY_MS);
358	<	lock.writeLock().unlock();
244	<	t.join();
357	>	awaitTermination(t);
358	>	releaseWriteLock(lock);
359		}
360
361		/**
362		* timed read-tryLock is interruptible
363		*/
364	<	public void testReadTryLock_Interrupted() throws InterruptedException {
365	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
364	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
365	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
366	>	public void testReadTryLock_Interruptible(boolean fair) {
367	>	final PublicReentrantReadWriteLock lock =
368	>	new PublicReentrantReadWriteLock(fair);
369		lock.writeLock().lock();
370	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
370	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
371		public void realRun() throws InterruptedException {
372	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
372	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
373		}});
374
375	<	t.start();
259	<	Thread.sleep(SHORT_DELAY_MS);
375	>	waitForQueuedThread(lock, t);
376		t.interrupt();
377	<	t.join();
377	>	awaitTermination(t);
378	>	releaseWriteLock(lock);
379		}
380
381	+	/**
382	+	* write-tryLock on an unlocked lock succeeds
383	+	*/
384	+	public void testWriteTryLock()      { testWriteTryLock(false); }
385	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
386	+	public void testWriteTryLock(boolean fair) {
387	+	final PublicReentrantReadWriteLock lock =
388	+	new PublicReentrantReadWriteLock(fair);
389	+	assertTrue(lock.writeLock().tryLock());
390	+	assertWriteLockedByMoi(lock);
391	+	assertTrue(lock.writeLock().tryLock());
392	+	assertWriteLockedByMoi(lock);
393	+	lock.writeLock().unlock();
394	+	releaseWriteLock(lock);
395	+	}
396
397		/**
398		* write-tryLock fails if locked
399		*/
400	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
401	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
400	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
401	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
402	>	public void testWriteTryLockWhenLocked(boolean fair) {
403	>	final PublicReentrantReadWriteLock lock =
404	>	new PublicReentrantReadWriteLock(fair);
405		lock.writeLock().lock();
406	<	Thread t = new Thread(new CheckedRunnable() {
406	>	Thread t = newStartedThread(new CheckedRunnable() {
407		public void realRun() {
408	<	threadAssertFalse(lock.writeLock().tryLock());
408	>	assertFalse(lock.writeLock().tryLock());
409		}});
410
411	<	t.start();
412	<	t.join();
278	<	lock.writeLock().unlock();
411	>	awaitTermination(t);
412	>	releaseWriteLock(lock);
413		}
414
415		/**
416		* read-tryLock fails if locked
417		*/
418	<	public void testReadTryLockWhenLocked() throws InterruptedException {
419	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
418	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
419	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
420	>	public void testReadTryLockWhenLocked(boolean fair) {
421	>	final PublicReentrantReadWriteLock lock =
422	>	new PublicReentrantReadWriteLock(fair);
423		lock.writeLock().lock();
424	<	Thread t = new Thread(new CheckedRunnable() {
424	>	Thread t = newStartedThread(new CheckedRunnable() {
425		public void realRun() {
426	<	threadAssertFalse(lock.readLock().tryLock());
426	>	assertFalse(lock.readLock().tryLock());
427		}});
428
429	<	t.start();
430	<	t.join();
294	<	lock.writeLock().unlock();
429	>	awaitTermination(t);
430	>	releaseWriteLock(lock);
431		}
432
433		/**
434		* Multiple threads can hold a read lock when not write-locked
435		*/
436	<	public void testMultipleReadLocks() throws InterruptedException {
437	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
436	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
437	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
438	>	public void testMultipleReadLocks(boolean fair) {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
440		lock.readLock().lock();
441	<	Thread t = new Thread(new CheckedRunnable() {
442	<	public void realRun() {
443	<	threadAssertTrue(lock.readLock().tryLock());
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws InterruptedException {
443	>	assertTrue(lock.readLock().tryLock());
444	>	lock.readLock().unlock();
445	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
446	>	lock.readLock().unlock();
447	>	lock.readLock().lock();
448		lock.readLock().unlock();
449		}});
450
451	<	t.start();
310	<	t.join();
451	>	awaitTermination(t);
452		lock.readLock().unlock();
453		}
454
455		/**
456	<	* A writelock succeeds after reading threads unlock
456	>	* A writelock succeeds only after a reading thread unlocks
457		*/
458	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
459	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
459	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
460	>	public void testWriteAfterReadLock(boolean fair) {
461	>	final PublicReentrantReadWriteLock lock =
462	>	new PublicReentrantReadWriteLock(fair);
463		lock.readLock().lock();
464	<	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() {
464	>	Thread t = newStartedThread(new CheckedRunnable() {
465		public void realRun() {
466	+	assertEquals(1, lock.getReadLockCount());
467		lock.writeLock().lock();
468	+	assertEquals(0, lock.getReadLockCount());
469		lock.writeLock().unlock();
470		}});
471	<
472	<	t1.start();
473	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
471	>	waitForQueuedThread(lock, t);
472	>	assertNotWriteLocked(lock);
473	>	assertEquals(1, lock.getReadLockCount());
474		lock.readLock().unlock();
475	<	t1.join(MEDIUM_DELAY_MS);
476	<	t2.join(MEDIUM_DELAY_MS);
477	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
475	>	assertEquals(0, lock.getReadLockCount());
476	>	awaitTermination(t);
477	>	assertNotWriteLocked(lock);
478		}
479
480		/**
481	<	* Readlocks succeed after a writing thread unlocks
481	>	* A writelock succeeds only after reading threads unlock
482		*/
483	<	public void testReadAfterWriteLock() throws InterruptedException {
484	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
485	<	lock.writeLock().lock();
486	<	Thread t1 = new Thread(new CheckedRunnable() {
483	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
484	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
485	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
486	>	final PublicReentrantReadWriteLock lock =
487	>	new PublicReentrantReadWriteLock(fair);
488	>	lock.readLock().lock();
489	>	lock.readLock().lock();
490	>	Thread t1 = newStartedThread(new CheckedRunnable() {
491		public void realRun() {
492		lock.readLock().lock();
493	+	assertEquals(3, lock.getReadLockCount());
494		lock.readLock().unlock();
495		}});
496	<	Thread t2 = new Thread(new CheckedRunnable() {
496	>	awaitTermination(t1);
497	>
498	>	Thread t2 = newStartedThread(new CheckedRunnable() {
499		public void realRun() {
500	<	lock.readLock().lock();
501	<	lock.readLock().unlock();
500	>	assertEquals(2, lock.getReadLockCount());
501	>	lock.writeLock().lock();
502	>	assertEquals(0, lock.getReadLockCount());
503	>	lock.writeLock().unlock();
504		}});
505	<
506	<	t1.start();
507	<	t2.start();
508	<	Thread.sleep(SHORT_DELAY_MS);
509	<	lock.writeLock().unlock();
510	<	t1.join(MEDIUM_DELAY_MS);
511	<	t2.join(MEDIUM_DELAY_MS);
512	<	assertTrue(!t1.isAlive());
365	<	assertTrue(!t2.isAlive());
505	>	waitForQueuedThread(lock, t2);
506	>	assertNotWriteLocked(lock);
507	>	assertEquals(2, lock.getReadLockCount());
508	>	lock.readLock().unlock();
509	>	lock.readLock().unlock();
510	>	assertEquals(0, lock.getReadLockCount());
511	>	awaitTermination(t2);
512	>	assertNotWriteLocked(lock);
513		}
514
515		/**
516	<	* Read trylock succeeds if write locked by current thread
516	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
517	>	* will block if there is a waiting writer thread
518		*/
519	<	public void testReadHoldingWriteLock() {
520	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
521	<	lock.writeLock().lock();
522	<	assertTrue(lock.readLock().tryLock());
519	>	public void testReaderWriterReaderFairFifo() {
520	>	final PublicReentrantReadWriteLock lock =
521	>	new PublicReentrantReadWriteLock(true);
522	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
523	>
524	>	lock.readLock().lock();
525	>	Thread t1 = newStartedThread(new CheckedRunnable() {
526	>	public void realRun() {
527	>	assertEquals(1, lock.getReadLockCount());
528	>	lock.writeLock().lock();
529	>	assertEquals(0, lock.getReadLockCount());
530	>	t1GotLock.set(true);
531	>	lock.writeLock().unlock();
532	>	}});
533	>	waitForQueuedThread(lock, t1);
534	>
535	>	Thread t2 = newStartedThread(new CheckedRunnable() {
536	>	public void realRun() {
537	>	assertEquals(1, lock.getReadLockCount());
538	>	lock.readLock().lock();
539	>	assertEquals(1, lock.getReadLockCount());
540	>	assertTrue(t1GotLock.get());
541	>	lock.readLock().unlock();
542	>	}});
543	>	waitForQueuedThread(lock, t2);
544	>	assertTrue(t1.isAlive());
545	>	assertNotWriteLocked(lock);
546	>	assertEquals(1, lock.getReadLockCount());
547		lock.readLock().unlock();
548	<	lock.writeLock().unlock();
548	>	awaitTermination(t1);
549	>	awaitTermination(t2);
550	>	assertNotWriteLocked(lock);
551		}
552
553		/**
554	<	* Read lock succeeds if write locked by current thread even if
381	<	* other threads are waiting for readlock
554	>	* Readlocks succeed only after a writing thread unlocks
555		*/
556	<	public void testReadHoldingWriteLock2() throws InterruptedException {
557	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
556	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
557	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
558	>	public void testReadAfterWriteLock(boolean fair) {
559	>	final PublicReentrantReadWriteLock lock =
560	>	new PublicReentrantReadWriteLock(fair);
561		lock.writeLock().lock();
562	<	Thread t1 = new Thread(new CheckedRunnable() {
562	>	Thread t1 = newStartedThread(new CheckedRunnable() {
563		public void realRun() {
564		lock.readLock().lock();
565		lock.readLock().unlock();
566		}});
567	<	Thread t2 = new Thread(new CheckedRunnable() {
567	>	Thread t2 = newStartedThread(new CheckedRunnable() {
568		public void realRun() {
569		lock.readLock().lock();
570		lock.readLock().unlock();
571		}});
572
573	<	t1.start();
574	<	t2.start();
575	<	lock.readLock().lock();
576	<	lock.readLock().unlock();
577	<	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());
573	>	waitForQueuedThread(lock, t1);
574	>	waitForQueuedThread(lock, t2);
575	>	releaseWriteLock(lock);
576	>	awaitTermination(t1);
577	>	awaitTermination(t2);
578		}
579
580		/**
581	<	*  Read lock succeeds if write locked by current thread even if
413	<	* other threads are waiting for writelock
581	>	* Read trylock succeeds if write locked by current thread
582		*/
583	<	public void testReadHoldingWriteLock3() throws InterruptedException {
584	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
583	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
584	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
585	>	public void testReadHoldingWriteLock(boolean fair) {
586	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
587		lock.writeLock().lock();
588	<	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();
588	>	assertTrue(lock.readLock().tryLock());
589		lock.readLock().unlock();
590		lock.writeLock().unlock();
437	–	t1.join(MEDIUM_DELAY_MS);
438	–	t2.join(MEDIUM_DELAY_MS);
439	–	assertTrue(!t1.isAlive());
440	–	assertTrue(!t2.isAlive());
591		}
592
443	–
593		/**
594	<	*  Write lock succeeds if write locked by current thread even if
595	<	* other threads are waiting for writelock
594	>	* Read trylock succeeds (barging) even in the presence of waiting
595	>	* readers and/or writers
596		*/
597	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
598	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
599	<	lock.writeLock().lock();
600	<	Thread t1 = new Thread(new CheckedRunnable() {
597	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
598	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
599	>	public void testReadTryLockBarging(boolean fair) {
600	>	final PublicReentrantReadWriteLock lock =
601	>	new PublicReentrantReadWriteLock(fair);
602	>	lock.readLock().lock();
603	>
604	>	Thread t1 = newStartedThread(new CheckedRunnable() {
605		public void realRun() {
606		lock.writeLock().lock();
607		lock.writeLock().unlock();
608		}});
609	<	Thread t2 = new Thread(new CheckedRunnable() {
609	>
610	>	waitForQueuedThread(lock, t1);
611	>
612	>	Thread t2 = newStartedThread(new CheckedRunnable() {
613		public void realRun() {
614	<	lock.writeLock().lock();
615	<	lock.writeLock().unlock();
614	>	lock.readLock().lock();
615	>	lock.readLock().unlock();
616		}});
617
618	<	t1.start();
619	<	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	<	}
618	>	if (fair)
619	>	waitForQueuedThread(lock, t2);
620
621	+	Thread t3 = newStartedThread(new CheckedRunnable() {
622	+	public void realRun() {
623	+	lock.readLock().tryLock();
624	+	lock.readLock().unlock();
625	+	}});
626
627	<	/**
628	<	* Fair Read trylock succeeds if write locked by current thread
629	<	*/
630	<	public void testReadHoldingWriteLockFair() {
481	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
482	<	lock.writeLock().lock();
483	<	assertTrue(lock.readLock().tryLock());
627	>	assertTrue(lock.getReadLockCount() > 0);
628	>	awaitTermination(t3);
629	>	assertTrue(t1.isAlive());
630	>	if (fair) assertTrue(t2.isAlive());
631		lock.readLock().unlock();
632	<	lock.writeLock().unlock();
632	>	awaitTermination(t1);
633	>	awaitTermination(t2);
634		}
635
636		/**
637	<	* Fair Read lock succeeds if write locked by current thread even if
637	>	* Read lock succeeds if write locked by current thread even if
638		* other threads are waiting for readlock
639		*/
640	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
641	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
640	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
641	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
642	>	public void testReadHoldingWriteLock2(boolean fair) {
643	>	final PublicReentrantReadWriteLock lock =
644	>	new PublicReentrantReadWriteLock(fair);
645		lock.writeLock().lock();
646	<	Thread t1 = new Thread(new CheckedRunnable() {
646	>	lock.readLock().lock();
647	>	lock.readLock().unlock();
648	>
649	>	Thread t1 = newStartedThread(new CheckedRunnable() {
650		public void realRun() {
651		lock.readLock().lock();
652		lock.readLock().unlock();
653		}});
654	<	Thread t2 = new Thread(new CheckedRunnable() {
654	>	Thread t2 = newStartedThread(new CheckedRunnable() {
655		public void realRun() {
656		lock.readLock().lock();
657		lock.readLock().unlock();
658		}});
659
660	<	t1.start();
661	<	t2.start();
662	<	lock.readLock().lock();
509	<	lock.readLock().unlock();
510	<	Thread.sleep(SHORT_DELAY_MS);
660	>	waitForQueuedThread(lock, t1);
661	>	waitForQueuedThread(lock, t2);
662	>	assertWriteLockedByMoi(lock);
663		lock.readLock().lock();
664		lock.readLock().unlock();
665	<	lock.writeLock().unlock();
666	<	t1.join(MEDIUM_DELAY_MS);
667	<	t2.join(MEDIUM_DELAY_MS);
516	<	assertTrue(!t1.isAlive());
517	<	assertTrue(!t2.isAlive());
665	>	releaseWriteLock(lock);
666	>	awaitTermination(t1);
667	>	awaitTermination(t2);
668		}
669
520	–
670		/**
671	<	* Fair Read lock succeeds if write locked by current thread even if
671	>	* Read lock succeeds if write locked by current thread even if
672		* other threads are waiting for writelock
673		*/
674	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
675	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
675	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
676	>	public void testReadHoldingWriteLock3(boolean fair) {
677	>	final PublicReentrantReadWriteLock lock =
678	>	new PublicReentrantReadWriteLock(fair);
679		lock.writeLock().lock();
680	<	Thread t1 = new Thread(new CheckedRunnable() {
680	>	lock.readLock().lock();
681	>	lock.readLock().unlock();
682	>
683	>	Thread t1 = newStartedThread(new CheckedRunnable() {
684		public void realRun() {
685		lock.writeLock().lock();
686		lock.writeLock().unlock();
687		}});
688	<	Thread t2 = new Thread(new CheckedRunnable() {
688	>	Thread t2 = newStartedThread(new CheckedRunnable() {
689		public void realRun() {
690		lock.writeLock().lock();
691		lock.writeLock().unlock();
692		}});
693
694	<	t1.start();
695	<	t2.start();
696	<	lock.readLock().lock();
542	<	lock.readLock().unlock();
543	<	Thread.sleep(SHORT_DELAY_MS);
694	>	waitForQueuedThread(lock, t1);
695	>	waitForQueuedThread(lock, t2);
696	>	assertWriteLockedByMoi(lock);
697		lock.readLock().lock();
698		lock.readLock().unlock();
699	+	assertWriteLockedByMoi(lock);
700		lock.writeLock().unlock();
701	<	t1.join(MEDIUM_DELAY_MS);
702	<	t2.join(MEDIUM_DELAY_MS);
549	<	assertTrue(!t1.isAlive());
550	<	assertTrue(!t2.isAlive());
701	>	awaitTermination(t1);
702	>	awaitTermination(t2);
703		}
704
553	–
705		/**
706	<	* Fair Write lock succeeds if write locked by current thread even if
706	>	* Write lock succeeds if write locked by current thread even if
707		* other threads are waiting for writelock
708		*/
709	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
710	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
709	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
710	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
711	>	public void testWriteHoldingWriteLock4(boolean fair) {
712	>	final PublicReentrantReadWriteLock lock =
713	>	new PublicReentrantReadWriteLock(fair);
714		lock.writeLock().lock();
715	<	Thread t1 = new Thread(new CheckedRunnable() {
715	>	lock.writeLock().lock();
716	>	lock.writeLock().unlock();
717	>
718	>	Thread t1 = newStartedThread(new CheckedRunnable() {
719		public void realRun() {
720		lock.writeLock().lock();
721		lock.writeLock().unlock();
722		}});
723	<	Thread t2 = new Thread(new CheckedRunnable() {
723	>	Thread t2 = newStartedThread(new CheckedRunnable() {
724		public void realRun() {
725		lock.writeLock().lock();
726		lock.writeLock().unlock();
727		}});
728
729	<	t1.start();
730	<	t2.start();
731	<	Thread.sleep(SHORT_DELAY_MS);
732	<	assertTrue(lock.isWriteLockedByCurrentThread());
576	<	assertTrue(lock.getWriteHoldCount() == 1);
577	<	lock.writeLock().lock();
578	<	assertTrue(lock.getWriteHoldCount() == 2);
579	<	lock.writeLock().unlock();
729	>	waitForQueuedThread(lock, t1);
730	>	waitForQueuedThread(lock, t2);
731	>	assertWriteLockedByMoi(lock);
732	>	assertEquals(1, lock.getWriteHoldCount());
733		lock.writeLock().lock();
734	+	assertWriteLockedByMoi(lock);
735	+	assertEquals(2, lock.getWriteHoldCount());
736		lock.writeLock().unlock();
737	+	assertWriteLockedByMoi(lock);
738	+	assertEquals(1, lock.getWriteHoldCount());
739		lock.writeLock().unlock();
740	<	t1.join(MEDIUM_DELAY_MS);
741	<	t2.join(MEDIUM_DELAY_MS);
585	<	assertTrue(!t1.isAlive());
586	<	assertTrue(!t2.isAlive());
740	>	awaitTermination(t1);
741	>	awaitTermination(t2);
742		}
743
589	–
744		/**
745		* Read tryLock succeeds if readlocked but not writelocked
746		*/
747	<	public void testTryLockWhenReadLocked() throws InterruptedException {
748	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
747	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
748	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
749	>	public void testTryLockWhenReadLocked(boolean fair) {
750	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
751		lock.readLock().lock();
752	<	Thread t = new Thread(new CheckedRunnable() {
752	>	Thread t = newStartedThread(new CheckedRunnable() {
753		public void realRun() {
754	<	threadAssertTrue(lock.readLock().tryLock());
754	>	assertTrue(lock.readLock().tryLock());
755		lock.readLock().unlock();
756		}});
757
758	<	t.start();
603	<	t.join();
758	>	awaitTermination(t);
759		lock.readLock().unlock();
760		}
761
607	–
608	–
762		/**
763		* write tryLock fails when readlocked
764		*/
765	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
766	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
765	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
766	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
767	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
768	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
769		lock.readLock().lock();
770	<	Thread t = new Thread(new CheckedRunnable() {
770	>	Thread t = newStartedThread(new CheckedRunnable() {
771		public void realRun() {
772	<	threadAssertFalse(lock.writeLock().tryLock());
772	>	assertFalse(lock.writeLock().tryLock());
773		}});
774
775	<	t.start();
621	<	t.join();
775	>	awaitTermination(t);
776		lock.readLock().unlock();
777		}
778
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	–	threadAssertTrue(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	–	threadAssertFalse(lock.writeLock().tryLock());
654	–	}});
655	–
656	–	t.start();
657	–	t.join();
658	–	lock.readLock().unlock();
659	–	}
660	–
661	–
662	–
779		/**
780		* write timed tryLock times out if locked
781		*/
782	<	public void testWriteTryLock_Timeout() throws InterruptedException {
783	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
782	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
783	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
784	>	public void testWriteTryLock_Timeout(boolean fair) {
785	>	final PublicReentrantReadWriteLock lock =
786	>	new PublicReentrantReadWriteLock(fair);
787		lock.writeLock().lock();
788	<	Thread t = new Thread(new CheckedRunnable() {
788	>	Thread t = newStartedThread(new CheckedRunnable() {
789		public void realRun() throws InterruptedException {
790	<	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
790	>	long startTime = System.nanoTime();
791	>	long timeoutMillis = 10;
792	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
793	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
794		}});
795
796	<	t.start();
797	<	t.join();
676	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
677	<	lock.writeLock().unlock();
796	>	awaitTermination(t);
797	>	releaseWriteLock(lock);
798		}
799
800		/**
801		* read timed tryLock times out if write-locked
802		*/
803	<	public void testReadTryLock_Timeout() throws InterruptedException {
804	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
804	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
805	>	public void testReadTryLock_Timeout(boolean fair) {
806	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
807		lock.writeLock().lock();
808	<	Thread t = new Thread(new CheckedRunnable() {
808	>	Thread t = newStartedThread(new CheckedRunnable() {
809		public void realRun() throws InterruptedException {
810	<	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
810	>	long startTime = System.nanoTime();
811	>	long timeoutMillis = 10;
812	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
813	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
814		}});
815
816	<	t.start();
692	<	t.join();
816	>	awaitTermination(t);
817		assertTrue(lock.writeLock().isHeldByCurrentThread());
818		lock.writeLock().unlock();
819		}
820
697	–
821		/**
822	<	* write lockInterruptibly succeeds if lock free else is interruptible
822	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
823		*/
824	<	public void testWriteLockInterruptibly() throws InterruptedException {
825	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
826	<	lock.writeLock().lockInterruptibly();
827	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
824	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
825	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
826	>	public void testWriteLockInterruptibly(boolean fair) {
827	>	final PublicReentrantReadWriteLock lock =
828	>	new PublicReentrantReadWriteLock(fair);
829	>	try {
830	>	lock.writeLock().lockInterruptibly();
831	>	} catch (InterruptedException ie) {
832	>	threadUnexpectedException(ie);
833	>	}
834	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
835		public void realRun() throws InterruptedException {
836		lock.writeLock().lockInterruptibly();
837		}});
838
839	<	t.start();
710	<	Thread.sleep(SHORT_DELAY_MS);
839	>	waitForQueuedThread(lock, t);
840		t.interrupt();
841	<	Thread.sleep(SHORT_DELAY_MS);
842	<	t.join();
843	<	lock.writeLock().unlock();
841	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
842	>	awaitTermination(t);
843	>	releaseWriteLock(lock);
844		}
845
846		/**
847	<	*  read lockInterruptibly succeeds if lock free else is interruptible
847	>	* read lockInterruptibly succeeds if lock free else is interruptible
848		*/
849	<	public void testReadLockInterruptibly() throws InterruptedException {
850	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	<	lock.writeLock().lockInterruptibly();
852	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
849	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
850	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
851	>	public void testReadLockInterruptibly(boolean fair) {
852	>	final PublicReentrantReadWriteLock lock =
853	>	new PublicReentrantReadWriteLock(fair);
854	>	try {
855	>	lock.readLock().lockInterruptibly();
856	>	lock.readLock().unlock();
857	>	lock.writeLock().lockInterruptibly();
858	>	} catch (InterruptedException ie) {
859	>	threadUnexpectedException(ie);
860	>	}
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	<	try {
881	<	c.await();
882	<	shouldThrow();
883	<	} catch (IllegalMonitorStateException success) {}
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 e) { threadUnexpectedException(e); }
887	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
888	>	}
889		}
890
891		/**
892		* Calling signal without holding lock throws IllegalMonitorStateException
893		*/
894	<	public void testSignal_IllegalMonitor() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
895	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
896	>	public void testSignal_IMSE(boolean fair) {
897	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
898		final Condition c = lock.writeLock().newCondition();
899		try {
900		c.signal();
#	Line 757 | Line 903 | public class ReentrantReadWriteLockTest
903		}
904
905		/**
906	<	* awaitNanos without a signal times out
906	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
907		*/
908	<	public void testAwaitNanos_Timeout() throws InterruptedException {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
909	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
910	>	public void testSignalAll_IMSE(boolean fair) {
911	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
912		final Condition c = lock.writeLock().newCondition();
913	<
914	<	lock.writeLock().lock();
915	<	long t = c.awaitNanos(100);
916	<	assertTrue(t <= 0);
769	<	lock.writeLock().unlock();
913	>	try {
914	>	c.signalAll();
915	>	shouldThrow();
916	>	} catch (IllegalMonitorStateException success) {}
917		}
918
919	+	/**
920	+	* awaitNanos without a signal times out
921	+	*/
922	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
923	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
924	+	public void testAwaitNanos_Timeout(boolean fair) {
925	+	try {
926	+	final ReentrantReadWriteLock lock =
927	+	new ReentrantReadWriteLock(fair);
928	+	final Condition c = lock.writeLock().newCondition();
929	+	lock.writeLock().lock();
930	+	long startTime = System.nanoTime();
931	+	long timeoutMillis = 10;
932	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
934	+	assertTrue(nanosRemaining <= 0);
935	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
936	+	lock.writeLock().unlock();
937	+	} catch (InterruptedException e) {
938	+	threadUnexpectedException(e);
939	+	}
940	+	}
941
942		/**
943	<	*  timed await without a signal times out
943	>	* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() throws InterruptedException {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
947	<	final Condition c = lock.writeLock().newCondition();
948	<	lock.writeLock().lock();
949	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
950	<	lock.writeLock().unlock();
945	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
946	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
947	>	public void testAwait_Timeout(boolean fair) {
948	>	try {
949	>	final ReentrantReadWriteLock lock =
950	>	new ReentrantReadWriteLock(fair);
951	>	final Condition c = lock.writeLock().newCondition();
952	>	lock.writeLock().lock();
953	>	long startTime = System.nanoTime();
954	>	long timeoutMillis = 10;
955	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
956	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957	>	lock.writeLock().unlock();
958	>	} catch (InterruptedException e) {
959	>	threadUnexpectedException(e);
960	>	}
961		}
962
963		/**
964		* awaitUntil without a signal times out
965		*/
966	<	public void testAwaitUntil_Timeout() throws InterruptedException {
967	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
968	<	final Condition c = lock.writeLock().newCondition();
969	<	lock.writeLock().lock();
970	<	java.util.Date d = new java.util.Date();
971	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
972	<	lock.writeLock().unlock();
966	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
967	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
968	>	public void testAwaitUntil_Timeout(boolean fair) {
969	>	try {
970	>	final ReentrantReadWriteLock lock =
971	>	new ReentrantReadWriteLock(fair);
972	>	final Condition c = lock.writeLock().newCondition();
973	>	lock.writeLock().lock();
974	>	long startTime = System.nanoTime();
975	>	long timeoutMillis = 10;
976	>	java.util.Date d = new java.util.Date();
977	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
978	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
979	>	lock.writeLock().unlock();
980	>	} catch (InterruptedException e) {
981	>	threadUnexpectedException(e);
982	>	}
983		}
984
985		/**
986		* await returns when signalled
987		*/
988	<	public void testAwait() throws InterruptedException {
989	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
988	>	public void testAwait()      { testAwait(false); }
989	>	public void testAwait_fair() { testAwait(true); }
990	>	public void testAwait(boolean fair) {
991	>	final PublicReentrantReadWriteLock lock =
992	>	new PublicReentrantReadWriteLock(fair);
993		final Condition c = lock.writeLock().newCondition();
994	<	Thread t = new Thread(new CheckedRunnable() {
994	>	final CountDownLatch locked = new CountDownLatch(1);
995	>	Thread t = newStartedThread(new CheckedRunnable() {
996		public void realRun() throws InterruptedException {
997		lock.writeLock().lock();
998	+	locked.countDown();
999		c.await();
1000		lock.writeLock().unlock();
1001		}});
1002
1003	<	t.start();
810	<	Thread.sleep(SHORT_DELAY_MS);
1003	>	await(locked);
1004		lock.writeLock().lock();
1005	+	assertHasWaiters(lock, c, t);
1006		c.signal();
1007	+	assertHasNoWaiters(lock, c);
1008	+	assertTrue(t.isAlive());
1009		lock.writeLock().unlock();
1010	<	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	<	}
1010	>	awaitTermination(t);
1011		}
1012
1013		/**
1014	<	* awaitUninterruptibly doesn't abort on interrupt
1014	>	* awaitUninterruptibly is uninterruptible
1015		*/
1016	<	public void testAwaitUninterruptibly() throws InterruptedException {
1017	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1016	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1017	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1018	>	public void testAwaitUninterruptibly(boolean fair) {
1019	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1020		final Condition c = lock.writeLock().newCondition();
1021	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1021	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1022
1023	<	thread.start();
1023	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1024	>	public void realRun() {
1025	>	// Interrupt before awaitUninterruptibly
1026	>	lock.writeLock().lock();
1027	>	pleaseInterrupt.countDown();
1028	>	Thread.currentThread().interrupt();
1029	>	c.awaitUninterruptibly();
1030	>	assertTrue(Thread.interrupted());
1031	>	lock.writeLock().unlock();
1032	>	}});
1033
1034	<	while (!thread.lockStarted) {
1035	<	Thread.sleep(100);
1036	<	}
1034	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1035	>	public void realRun() {
1036	>	// Interrupt during awaitUninterruptibly
1037	>	lock.writeLock().lock();
1038	>	pleaseInterrupt.countDown();
1039	>	c.awaitUninterruptibly();
1040	>	assertTrue(Thread.interrupted());
1041	>	lock.writeLock().unlock();
1042	>	}});
1043
1044	+	await(pleaseInterrupt);
1045		lock.writeLock().lock();
1046	<	try {
1047	<	thread.interrupt();
1048	<	thread.canAwake = true;
1049	<	c.signal();
1050	<	} finally {
1051	<	lock.writeLock().unlock();
1052	<	}
1046	>	lock.writeLock().unlock();
1047	>	t2.interrupt();
1048	>
1049	>	assertThreadStaysAlive(t1);
1050	>	assertTrue(t2.isAlive());
1051	>
1052	>	lock.writeLock().lock();
1053	>	c.signalAll();
1054	>	lock.writeLock().unlock();
1055
1056	<	thread.join();
1057	<	assertTrue(thread.interrupted);
870	<	assertFalse(thread.isAlive());
1056	>	awaitTermination(t1);
1057	>	awaitTermination(t2);
1058		}
1059
1060		/**
1061	<	* await is interruptible
1061	>	* await/awaitNanos/awaitUntil is interruptible
1062		*/
1063	<	public void testAwait_Interrupt() throws InterruptedException {
1064	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1063	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1064	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1065	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1066	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1067	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1068	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1069	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1070	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1071	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1072	>	final PublicReentrantReadWriteLock lock =
1073	>	new PublicReentrantReadWriteLock(fair);
1074		final Condition c = lock.writeLock().newCondition();
1075	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1075	>	final CountDownLatch locked = new CountDownLatch(1);
1076	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1077		public void realRun() throws InterruptedException {
1078		lock.writeLock().lock();
1079	<	c.await();
1080	<	lock.writeLock().unlock();
1079	>	assertWriteLockedByMoi(lock);
1080	>	assertHasNoWaiters(lock, c);
1081	>	locked.countDown();
1082	>	try {
1083	>	await(c, awaitMethod);
1084	>	} finally {
1085	>	assertWriteLockedByMoi(lock);
1086	>	assertHasNoWaiters(lock, c);
1087	>	lock.writeLock().unlock();
1088	>	assertFalse(Thread.interrupted());
1089	>	}
1090		}});
1091
1092	<	t.start();
1093	<	Thread.sleep(SHORT_DELAY_MS);
1092	>	await(locked);
1093	>	assertHasWaiters(lock, c, t);
1094		t.interrupt();
1095	<	t.join(SHORT_DELAY_MS);
1096	<	assertFalse(t.isAlive());
1095	>	awaitTermination(t);
1096	>	assertNotWriteLocked(lock);
1097		}
1098
1099		/**
1100	<	* awaitNanos is interruptible
1100	>	* signalAll wakes up all threads
1101		*/
1102	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1103	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1102	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1103	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1104	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1105	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1106	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1107	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1108	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1109	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1110	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1111	>	final PublicReentrantReadWriteLock lock =
1112	>	new PublicReentrantReadWriteLock(fair);
1113		final Condition c = lock.writeLock().newCondition();
1114	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1114	>	final CountDownLatch locked = new CountDownLatch(2);
1115	>	final Lock writeLock = lock.writeLock();
1116	>	class Awaiter extends CheckedRunnable {
1117		public void realRun() throws InterruptedException {
1118	<	lock.writeLock().lock();
1119	<	c.awaitNanos(LONG_DELAY_MS * 1000L * 1000L);
1120	<	lock.writeLock().unlock();
1121	<	}});
1118	>	writeLock.lock();
1119	>	locked.countDown();
1120	>	await(c, awaitMethod);
1121	>	writeLock.unlock();
1122	>	}
1123	>	}
1124
1125	<	t.start();
1126	<	Thread.sleep(SHORT_DELAY_MS);
1127	<	t.interrupt();
1128	<	t.join(SHORT_DELAY_MS);
1129	<	assertFalse(t.isAlive());
1125	>	Thread t1 = newStartedThread(new Awaiter());
1126	>	Thread t2 = newStartedThread(new Awaiter());
1127	>
1128	>	await(locked);
1129	>	writeLock.lock();
1130	>	assertHasWaiters(lock, c, t1, t2);
1131	>	c.signalAll();
1132	>	assertHasNoWaiters(lock, c);
1133	>	writeLock.unlock();
1134	>	awaitTermination(t1);
1135	>	awaitTermination(t2);
1136		}
1137
1138		/**
1139	<	* awaitUntil is interruptible
1139	>	* signal wakes up waiting threads in FIFO order
1140		*/
1141	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1142	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1141	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1142	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1143	>	public void testSignalWakesFifo(boolean fair) {
1144	>	final PublicReentrantReadWriteLock lock =
1145	>	new PublicReentrantReadWriteLock(fair);
1146		final Condition c = lock.writeLock().newCondition();
1147	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1147	>	final CountDownLatch locked1 = new CountDownLatch(1);
1148	>	final CountDownLatch locked2 = new CountDownLatch(1);
1149	>	final Lock writeLock = lock.writeLock();
1150	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1151		public void realRun() throws InterruptedException {
1152	<	lock.writeLock().lock();
1153	<	java.util.Date d = new java.util.Date();
1154	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1155	<	lock.writeLock().unlock();
1152	>	writeLock.lock();
1153	>	locked1.countDown();
1154	>	c.await();
1155	>	writeLock.unlock();
1156		}});
1157
1158	<	t.start();
1159	<	Thread.sleep(SHORT_DELAY_MS);
1160	<	t.interrupt();
1161	<	t.join(SHORT_DELAY_MS);
1162	<	assertFalse(t.isAlive());
1158	>	await(locked1);
1159	>
1160	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1161	>	public void realRun() throws InterruptedException {
1162	>	writeLock.lock();
1163	>	locked2.countDown();
1164	>	c.await();
1165	>	writeLock.unlock();
1166	>	}});
1167	>
1168	>	await(locked2);
1169	>
1170	>	writeLock.lock();
1171	>	assertHasWaiters(lock, c, t1, t2);
1172	>	assertFalse(lock.hasQueuedThreads());
1173	>	c.signal();
1174	>	assertHasWaiters(lock, c, t2);
1175	>	assertTrue(lock.hasQueuedThread(t1));
1176	>	assertFalse(lock.hasQueuedThread(t2));
1177	>	c.signal();
1178	>	assertHasNoWaiters(lock, c);
1179	>	assertTrue(lock.hasQueuedThread(t1));
1180	>	assertTrue(lock.hasQueuedThread(t2));
1181	>	writeLock.unlock();
1182	>	awaitTermination(t1);
1183	>	awaitTermination(t2);
1184		}
1185
1186		/**
1187	<	* signalAll wakes up all threads
1188	<	*/
1189	<	public void testSignalAll() throws InterruptedException {
1190	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1187	>	* await after multiple reentrant locking preserves lock count
1188	>	*/
1189	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1190	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1191	>	public void testAwaitLockCount(boolean fair) {
1192	>	final PublicReentrantReadWriteLock lock =
1193	>	new PublicReentrantReadWriteLock(fair);
1194		final Condition c = lock.writeLock().newCondition();
1195	<	Thread t1 = new Thread(new CheckedRunnable() {
1195	>	final CountDownLatch locked = new CountDownLatch(2);
1196	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1197		public void realRun() throws InterruptedException {
1198		lock.writeLock().lock();
1199	+	assertWriteLockedByMoi(lock);
1200	+	assertEquals(1, lock.writeLock().getHoldCount());
1201	+	locked.countDown();
1202		c.await();
1203	+	assertWriteLockedByMoi(lock);
1204	+	assertEquals(1, lock.writeLock().getHoldCount());
1205		lock.writeLock().unlock();
1206		}});
1207
1208	<	Thread t2 = new Thread(new CheckedRunnable() {
1208	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1209		public void realRun() throws InterruptedException {
1210		lock.writeLock().lock();
1211	+	lock.writeLock().lock();
1212	+	assertWriteLockedByMoi(lock);
1213	+	assertEquals(2, lock.writeLock().getHoldCount());
1214	+	locked.countDown();
1215		c.await();
1216	+	assertWriteLockedByMoi(lock);
1217	+	assertEquals(2, lock.writeLock().getHoldCount());
1218	+	lock.writeLock().unlock();
1219		lock.writeLock().unlock();
1220		}});
1221
1222	<	t1.start();
955	<	t2.start();
956	<	Thread.sleep(SHORT_DELAY_MS);
1222	>	await(locked);
1223		lock.writeLock().lock();
1224	+	assertHasWaiters(lock, c, t1, t2);
1225		c.signalAll();
1226	+	assertHasNoWaiters(lock, c);
1227		lock.writeLock().unlock();
1228	<	t1.join(SHORT_DELAY_MS);
1229	<	t2.join(SHORT_DELAY_MS);
962	<	assertFalse(t1.isAlive());
963	<	assertFalse(t2.isAlive());
1228	>	awaitTermination(t1);
1229	>	awaitTermination(t2);
1230		}
1231
1232		/**
1233		* A serialized lock deserializes as unlocked
1234		*/
1235	<	public void testSerialization() throws Exception {
1236	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1237	<	l.readLock().lock();
1238	<	l.readLock().unlock();
1239	<
1240	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1241	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1242	<	out.writeObject(l);
1243	<	out.close();
1244	<
1245	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1246	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1247	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1248	<	r.readLock().lock();
1249	<	r.readLock().unlock();
1235	>	public void testSerialization()      { testSerialization(false); }
1236	>	public void testSerialization_fair() { testSerialization(true); }
1237	>	public void testSerialization(boolean fair) {
1238	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1239	>	lock.writeLock().lock();
1240	>	lock.readLock().lock();
1241	>
1242	>	ReentrantReadWriteLock clone = serialClone(lock);
1243	>	assertEquals(lock.isFair(), clone.isFair());
1244	>	assertTrue(lock.isWriteLocked());
1245	>	assertFalse(clone.isWriteLocked());
1246	>	assertEquals(1, lock.getReadLockCount());
1247	>	assertEquals(0, clone.getReadLockCount());
1248	>	clone.writeLock().lock();
1249	>	clone.readLock().lock();
1250	>	assertTrue(clone.isWriteLocked());
1251	>	assertEquals(1, clone.getReadLockCount());
1252	>	clone.readLock().unlock();
1253	>	clone.writeLock().unlock();
1254	>	assertFalse(clone.isWriteLocked());
1255	>	assertEquals(1, lock.getReadLockCount());
1256	>	assertEquals(0, clone.getReadLockCount());
1257		}
1258
1259		/**
1260		* hasQueuedThreads reports whether there are waiting threads
1261		*/
1262	<	public void testhasQueuedThreads() throws InterruptedException {
1263	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1262	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1263	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1264	>	public void testHasQueuedThreads(boolean fair) {
1265	>	final PublicReentrantReadWriteLock lock =
1266	>	new PublicReentrantReadWriteLock(fair);
1267		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1268		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1269		assertFalse(lock.hasQueuedThreads());
1270		lock.writeLock().lock();
1271	+	assertFalse(lock.hasQueuedThreads());
1272		t1.start();
1273	<	Thread.sleep(SHORT_DELAY_MS);
1273	>	waitForQueuedThread(lock, t1);
1274		assertTrue(lock.hasQueuedThreads());
1275		t2.start();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1276	>	waitForQueuedThread(lock, t2);
1277		assertTrue(lock.hasQueuedThreads());
1278		t1.interrupt();
1279	<	Thread.sleep(SHORT_DELAY_MS);
1279	>	awaitTermination(t1);
1280		assertTrue(lock.hasQueuedThreads());
1281		lock.writeLock().unlock();
1282	<	Thread.sleep(SHORT_DELAY_MS);
1282	>	awaitTermination(t2);
1283		assertFalse(lock.hasQueuedThreads());
1007	–	t1.join();
1008	–	t2.join();
1284		}
1285
1286		/**
1287		* hasQueuedThread(null) throws NPE
1288		*/
1289	<	public void testHasQueuedThreadNPE() {
1290	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1289	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1290	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1291	>	public void testHasQueuedThreadNPE(boolean fair) {
1292	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1293		try {
1294	<	sync.hasQueuedThread(null);
1294	>	lock.hasQueuedThread(null);
1295		shouldThrow();
1296		} catch (NullPointerException success) {}
1297		}
1298
1299		/**
1300	<	* hasQueuedThread reports whether a thread is queued.
1300	>	* hasQueuedThread reports whether a thread is queued
1301		*/
1302	<	public void testHasQueuedThread() throws InterruptedException {
1303	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1304	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1305	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1306	<	assertFalse(sync.hasQueuedThread(t1));
1307	<	assertFalse(sync.hasQueuedThread(t2));
1308	<	sync.writeLock().lock();
1302	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1303	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1304	>	public void testHasQueuedThread(boolean fair) {
1305	>	final PublicReentrantReadWriteLock lock =
1306	>	new PublicReentrantReadWriteLock(fair);
1307	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1308	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1309	>	assertFalse(lock.hasQueuedThread(t1));
1310	>	assertFalse(lock.hasQueuedThread(t2));
1311	>	lock.writeLock().lock();
1312		t1.start();
1313	<	Thread.sleep(SHORT_DELAY_MS);
1314	<	assertTrue(sync.hasQueuedThread(t1));
1313	>	waitForQueuedThread(lock, t1);
1314	>	assertTrue(lock.hasQueuedThread(t1));
1315	>	assertFalse(lock.hasQueuedThread(t2));
1316		t2.start();
1317	<	Thread.sleep(SHORT_DELAY_MS);
1318	<	assertTrue(sync.hasQueuedThread(t1));
1319	<	assertTrue(sync.hasQueuedThread(t2));
1317	>	waitForQueuedThread(lock, t2);
1318	>	assertTrue(lock.hasQueuedThread(t1));
1319	>	assertTrue(lock.hasQueuedThread(t2));
1320		t1.interrupt();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1322	<	assertFalse(sync.hasQueuedThread(t1));
1323	<	assertTrue(sync.hasQueuedThread(t2));
1324	<	sync.writeLock().unlock();
1325	<	Thread.sleep(SHORT_DELAY_MS);
1326	<	assertFalse(sync.hasQueuedThread(t1));
1327	<	Thread.sleep(SHORT_DELAY_MS);
1047	<	assertFalse(sync.hasQueuedThread(t2));
1048	<	t1.join();
1049	<	t2.join();
1321	>	awaitTermination(t1);
1322	>	assertFalse(lock.hasQueuedThread(t1));
1323	>	assertTrue(lock.hasQueuedThread(t2));
1324	>	lock.writeLock().unlock();
1325	>	awaitTermination(t2);
1326	>	assertFalse(lock.hasQueuedThread(t1));
1327	>	assertFalse(lock.hasQueuedThread(t2));
1328		}
1329
1052	–
1330		/**
1331		* getQueueLength reports number of waiting threads
1332		*/
1333	<	public void testGetQueueLength() throws InterruptedException {
1334	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1333	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1334	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1335	>	public void testGetQueueLength(boolean fair) {
1336	>	final PublicReentrantReadWriteLock lock =
1337	>	new PublicReentrantReadWriteLock(fair);
1338		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1339		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1340		assertEquals(0, lock.getQueueLength());
1341		lock.writeLock().lock();
1342		t1.start();
1343	<	Thread.sleep(SHORT_DELAY_MS);
1343	>	waitForQueuedThread(lock, t1);
1344		assertEquals(1, lock.getQueueLength());
1345		t2.start();
1346	<	Thread.sleep(SHORT_DELAY_MS);
1346	>	waitForQueuedThread(lock, t2);
1347		assertEquals(2, lock.getQueueLength());
1348		t1.interrupt();
1349	<	Thread.sleep(SHORT_DELAY_MS);
1349	>	awaitTermination(t1);
1350		assertEquals(1, lock.getQueueLength());
1351		lock.writeLock().unlock();
1352	<	Thread.sleep(SHORT_DELAY_MS);
1352	>	awaitTermination(t2);
1353		assertEquals(0, lock.getQueueLength());
1074	–	t1.join();
1075	–	t2.join();
1354		}
1355
1356		/**
1357		* getQueuedThreads includes waiting threads
1358		*/
1359	<	public void testGetQueuedThreads() throws InterruptedException {
1360	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1359	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1360	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1361	>	public void testGetQueuedThreads(boolean fair) {
1362	>	final PublicReentrantReadWriteLock lock =
1363	>	new PublicReentrantReadWriteLock(fair);
1364		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1365		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1366		assertTrue(lock.getQueuedThreads().isEmpty());
1367		lock.writeLock().lock();
1368		assertTrue(lock.getQueuedThreads().isEmpty());
1369		t1.start();
1370	<	Thread.sleep(SHORT_DELAY_MS);
1370	>	waitForQueuedThread(lock, t1);
1371	>	assertEquals(1, lock.getQueuedThreads().size());
1372		assertTrue(lock.getQueuedThreads().contains(t1));
1373		t2.start();
1374	<	Thread.sleep(SHORT_DELAY_MS);
1374	>	waitForQueuedThread(lock, t2);
1375	>	assertEquals(2, lock.getQueuedThreads().size());
1376		assertTrue(lock.getQueuedThreads().contains(t1));
1377		assertTrue(lock.getQueuedThreads().contains(t2));
1378		t1.interrupt();
1379	<	Thread.sleep(SHORT_DELAY_MS);
1379	>	awaitTermination(t1);
1380		assertFalse(lock.getQueuedThreads().contains(t1));
1381		assertTrue(lock.getQueuedThreads().contains(t2));
1382	+	assertEquals(1, lock.getQueuedThreads().size());
1383		lock.writeLock().unlock();
1384	<	Thread.sleep(SHORT_DELAY_MS);
1384	>	awaitTermination(t2);
1385		assertTrue(lock.getQueuedThreads().isEmpty());
1102	–	t1.join();
1103	–	t2.join();
1386		}
1387
1388		/**
1389		* hasWaiters throws NPE if null
1390		*/
1391	<	public void testHasWaitersNPE() {
1392	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1391	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1392	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1393	>	public void testHasWaitersNPE(boolean fair) {
1394	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1395		try {
1396		lock.hasWaiters(null);
1397		shouldThrow();
#	Line 1117 | Line 1401 | public class ReentrantReadWriteLockTest
1401		/**
1402		* getWaitQueueLength throws NPE if null
1403		*/
1404	<	public void testGetWaitQueueLengthNPE() {
1405	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1404	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1405	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1406	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1407	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1408		try {
1409		lock.getWaitQueueLength(null);
1410		shouldThrow();
1411		} catch (NullPointerException success) {}
1412		}
1413
1128	–
1414		/**
1415		* getWaitingThreads throws NPE if null
1416		*/
1417	<	public void testGetWaitingThreadsNPE() {
1418	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1417	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1418	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1419	>	public void testGetWaitingThreadsNPE(boolean fair) {
1420	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1421		try {
1422		lock.getWaitingThreads(null);
1423		shouldThrow();
#	Line 1138 | Line 1425 | public class ReentrantReadWriteLockTest
1425		}
1426
1427		/**
1428	<	* hasWaiters throws IAE if not owned
1428	>	* hasWaiters throws IllegalArgumentException if not owned
1429		*/
1430	<	public void testHasWaitersIAE() {
1431	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1430	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1431	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1432	>	public void testHasWaitersIAE(boolean fair) {
1433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1434		final Condition c = lock.writeLock().newCondition();
1435	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1435	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1436		try {
1437		lock2.hasWaiters(c);
1438		shouldThrow();
#	Line 1151 | Line 1440 | public class ReentrantReadWriteLockTest
1440		}
1441
1442		/**
1443	<	* hasWaiters throws IMSE if not locked
1443	>	* hasWaiters throws IllegalMonitorStateException if not locked
1444		*/
1445	<	public void testHasWaitersIMSE() {
1446	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1445	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1446	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1447	>	public void testHasWaitersIMSE(boolean fair) {
1448	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1449		final Condition c = lock.writeLock().newCondition();
1450		try {
1451		lock.hasWaiters(c);
#	Line 1162 | Line 1453 | public class ReentrantReadWriteLockTest
1453		} catch (IllegalMonitorStateException success) {}
1454		}
1455
1165	–
1456		/**
1457	<	* getWaitQueueLength throws IAE if not owned
1457	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1458		*/
1459	<	public void testGetWaitQueueLengthIAE() {
1460	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1459	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1460	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1461	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1462	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1463		final Condition c = lock.writeLock().newCondition();
1464	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1464	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1465		try {
1466		lock2.getWaitQueueLength(c);
1467		shouldThrow();
#	Line 1177 | Line 1469 | public class ReentrantReadWriteLockTest
1469		}
1470
1471		/**
1472	<	* getWaitQueueLength throws IMSE if not locked
1472	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1473		*/
1474	<	public void testGetWaitQueueLengthIMSE() {
1475	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1474	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1475	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1476	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1477	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1478		final Condition c = lock.writeLock().newCondition();
1479		try {
1480		lock.getWaitQueueLength(c);
#	Line 1188 | Line 1482 | public class ReentrantReadWriteLockTest
1482		} catch (IllegalMonitorStateException success) {}
1483		}
1484
1191	–
1485		/**
1486	<	* getWaitingThreads throws IAE if not owned
1486	>	* getWaitingThreads throws IllegalArgumentException if not owned
1487		*/
1488	<	public void testGetWaitingThreadsIAE() {
1489	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1488	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1489	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1490	>	public void testGetWaitingThreadsIAE(boolean fair) {
1491	>	final PublicReentrantReadWriteLock lock =
1492	>	new PublicReentrantReadWriteLock(fair);
1493		final Condition c = lock.writeLock().newCondition();
1494	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1494	>	final PublicReentrantReadWriteLock lock2 =
1495	>	new PublicReentrantReadWriteLock(fair);
1496		try {
1497		lock2.getWaitingThreads(c);
1498		shouldThrow();
#	Line 1203 | Line 1500 | public class ReentrantReadWriteLockTest
1500		}
1501
1502		/**
1503	<	* getWaitingThreads throws IMSE if not locked
1503	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1504		*/
1505	<	public void testGetWaitingThreadsIMSE() {
1506	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1505	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1506	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1507	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1508	>	final PublicReentrantReadWriteLock lock =
1509	>	new PublicReentrantReadWriteLock(fair);
1510		final Condition c = lock.writeLock().newCondition();
1511		try {
1512		lock.getWaitingThreads(c);
#	Line 1214 | Line 1514 | public class ReentrantReadWriteLockTest
1514		} catch (IllegalMonitorStateException success) {}
1515		}
1516
1217	–
1517		/**
1518		* hasWaiters returns true when a thread is waiting, else false
1519		*/
1520	<	public void testHasWaiters() throws InterruptedException {
1521	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1520	>	public void testHasWaiters()      { testHasWaiters(false); }
1521	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1522	>	public void testHasWaiters(boolean fair) {
1523	>	final PublicReentrantReadWriteLock lock =
1524	>	new PublicReentrantReadWriteLock(fair);
1525		final Condition c = lock.writeLock().newCondition();
1526	<	Thread t = new Thread(new CheckedRunnable() {
1526	>	final CountDownLatch locked = new CountDownLatch(1);
1527	>	Thread t = newStartedThread(new CheckedRunnable() {
1528		public void realRun() throws InterruptedException {
1529		lock.writeLock().lock();
1530	<	threadAssertFalse(lock.hasWaiters(c));
1531	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1530	>	assertHasNoWaiters(lock, c);
1531	>	assertFalse(lock.hasWaiters(c));
1532	>	locked.countDown();
1533		c.await();
1534	+	assertHasNoWaiters(lock, c);
1535	+	assertFalse(lock.hasWaiters(c));
1536		lock.writeLock().unlock();
1537		}});
1538
1539	<	t.start();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1539	>	await(locked);
1540		lock.writeLock().lock();
1541	+	assertHasWaiters(lock, c, t);
1542		assertTrue(lock.hasWaiters(c));
1237	–	assertEquals(1, lock.getWaitQueueLength(c));
1543		c.signal();
1544	<	lock.writeLock().unlock();
1240	<	Thread.sleep(SHORT_DELAY_MS);
1241	<	lock.writeLock().lock();
1544	>	assertHasNoWaiters(lock, c);
1545		assertFalse(lock.hasWaiters(c));
1243	–	assertEquals(0, lock.getWaitQueueLength(c));
1546		lock.writeLock().unlock();
1547	<	t.join(SHORT_DELAY_MS);
1548	<	assertFalse(t.isAlive());
1547	>	awaitTermination(t);
1548	>	assertHasNoWaiters(lock, c);
1549		}
1550
1551		/**
1552		* getWaitQueueLength returns number of waiting threads
1553		*/
1554	<	public void testGetWaitQueueLength() throws InterruptedException {
1555	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1554	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1555	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1556	>	public void testGetWaitQueueLength(boolean fair) {
1557	>	final PublicReentrantReadWriteLock lock =
1558	>	new PublicReentrantReadWriteLock(fair);
1559		final Condition c = lock.writeLock().newCondition();
1560	<	Thread t = new Thread(new CheckedRunnable() {
1560	>	final CountDownLatch locked = new CountDownLatch(1);
1561	>	Thread t = newStartedThread(new CheckedRunnable() {
1562		public void realRun() throws InterruptedException {
1563		lock.writeLock().lock();
1564	<	threadAssertFalse(lock.hasWaiters(c));
1565	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1564	>	assertEquals(0, lock.getWaitQueueLength(c));
1565	>	locked.countDown();
1566		c.await();
1567		lock.writeLock().unlock();
1568		}});
1569
1570	<	t.start();
1265	<	Thread.sleep(SHORT_DELAY_MS);
1570	>	await(locked);
1571		lock.writeLock().lock();
1572	<	assertTrue(lock.hasWaiters(c));
1572	>	assertHasWaiters(lock, c, t);
1573		assertEquals(1, lock.getWaitQueueLength(c));
1574		c.signal();
1575	<	lock.writeLock().unlock();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1272	<	lock.writeLock().lock();
1273	<	assertFalse(lock.hasWaiters(c));
1575	>	assertHasNoWaiters(lock, c);
1576		assertEquals(0, lock.getWaitQueueLength(c));
1577		lock.writeLock().unlock();
1578	<	t.join(SHORT_DELAY_MS);
1277	<	assertFalse(t.isAlive());
1578	>	awaitTermination(t);
1579		}
1580
1280	–
1581		/**
1582		* getWaitingThreads returns only and all waiting threads
1583		*/
1584	<	public void testGetWaitingThreads() throws InterruptedException {
1585	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1584	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1585	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1586	>	public void testGetWaitingThreads(boolean fair) {
1587	>	final PublicReentrantReadWriteLock lock =
1588	>	new PublicReentrantReadWriteLock(fair);
1589		final Condition c = lock.writeLock().newCondition();
1590	+	final CountDownLatch locked1 = new CountDownLatch(1);
1591	+	final CountDownLatch locked2 = new CountDownLatch(1);
1592		Thread t1 = new Thread(new CheckedRunnable() {
1593		public void realRun() throws InterruptedException {
1594		lock.writeLock().lock();
1595	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1595	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1596	>	locked1.countDown();
1597		c.await();
1598		lock.writeLock().unlock();
1599		}});
#	Line 1295 | Line 1601 | public class ReentrantReadWriteLockTest
1601		Thread t2 = new Thread(new CheckedRunnable() {
1602		public void realRun() throws InterruptedException {
1603		lock.writeLock().lock();
1604	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1604	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1605	>	locked2.countDown();
1606		c.await();
1607		lock.writeLock().unlock();
1608		}});
#	Line 1303 | Line 1610 | public class ReentrantReadWriteLockTest
1610		lock.writeLock().lock();
1611		assertTrue(lock.getWaitingThreads(c).isEmpty());
1612		lock.writeLock().unlock();
1613	+
1614		t1.start();
1615	<	Thread.sleep(SHORT_DELAY_MS);
1615	>	await(locked1);
1616		t2.start();
1617	<	Thread.sleep(SHORT_DELAY_MS);
1617	>	await(locked2);
1618	>
1619		lock.writeLock().lock();
1620		assertTrue(lock.hasWaiters(c));
1621		assertTrue(lock.getWaitingThreads(c).contains(t1));
1622		assertTrue(lock.getWaitingThreads(c).contains(t2));
1623	+	assertEquals(2, lock.getWaitingThreads(c).size());
1624		c.signalAll();
1625	+	assertHasNoWaiters(lock, c);
1626		lock.writeLock().unlock();
1627	<	Thread.sleep(SHORT_DELAY_MS);
1628	<	lock.writeLock().lock();
1629	<	assertFalse(lock.hasWaiters(c));
1630	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1631	<	lock.writeLock().unlock();
1321	<	t1.join(SHORT_DELAY_MS);
1322	<	t2.join(SHORT_DELAY_MS);
1323	<	assertFalse(t1.isAlive());
1324	<	assertFalse(t2.isAlive());
1627	>
1628	>	awaitTermination(t1);
1629	>	awaitTermination(t2);
1630	>
1631	>	assertHasNoWaiters(lock, c);
1632		}
1633
1634		/**
1635		* toString indicates current lock state
1636		*/
1637	<	public void testToString() {
1638	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1639	<	String us = lock.toString();
1640	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1641	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1642	<	lock.writeLock().lock();
1643	<	String ws = lock.toString();
1644	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1645	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1637	>	public void testToString()      { testToString(false); }
1638	>	public void testToString_fair() { testToString(true); }
1639	>	public void testToString(boolean fair) {
1640	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1641	>	assertTrue(lock.toString().contains("Write locks = 0"));
1642	>	assertTrue(lock.toString().contains("Read locks = 0"));
1643	>	lock.writeLock().lock();
1644	>	assertTrue(lock.toString().contains("Write locks = 1"));
1645	>	assertTrue(lock.toString().contains("Read locks = 0"));
1646		lock.writeLock().unlock();
1647		lock.readLock().lock();
1648		lock.readLock().lock();
1649	<	String rs = lock.toString();
1650	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1344	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1649	>	assertTrue(lock.toString().contains("Write locks = 0"));
1650	>	assertTrue(lock.toString().contains("Read locks = 2"));
1651		}
1652
1653		/**
1654		* readLock.toString indicates current lock state
1655		*/
1656	<	public void testReadLockToString() {
1657	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1658	<	String us = lock.readLock().toString();
1659	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1656	>	public void testReadLockToString()      { testReadLockToString(false); }
1657	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1658	>	public void testReadLockToString(boolean fair) {
1659	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1660	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1661		lock.readLock().lock();
1662		lock.readLock().lock();
1663	<	String rs = lock.readLock().toString();
1357	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664		}
1665
1666		/**
1667		* writeLock.toString indicates current lock state
1668		*/
1669	<	public void testWriteLockToString() {
1670	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1671	<	String us = lock.writeLock().toString();
1672	<	assertTrue(us.indexOf("Unlocked") >= 0);
1669	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1670	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1671	>	public void testWriteLockToString(boolean fair) {
1672	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1673	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1674		lock.writeLock().lock();
1675	<	String ls = lock.writeLock().toString();
1676	<	assertTrue(ls.indexOf("Locked") >= 0);
1675	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1676	>	lock.writeLock().unlock();
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678		}
1679
1680		}

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