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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.32 by jsr166, Tue Nov 17 14:18:28 2009 UTC vs.
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
#	Line 31 | Line 33 | public class ReentrantReadWriteLockTest
33		}
34		}
35
34	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
#	Line 49 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	+	public Thread getOwner() {
55	+	return super.getOwner();
56	+	}
57		public Collection<Thread> getQueuedThreads() {
58		return super.getQueuedThreads();
59		}
#	Line 58 | Line 63 | public class ReentrantReadWriteLockTest
63		}
64
65		/**
66	+	* Releases write lock, checking that it had a hold count of 1.
67	+	*/
68	+	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	+	assertWriteLockedBy(lock, Thread.currentThread());
71	+	assertEquals(1, lock.getWriteHoldCount());
72	+	writeLock.unlock();
73	+	assertNotWriteLocked(lock);
74	+	}
75	+
76	+	/**
77	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78	+	*/
79	+	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	+	long startTime = System.nanoTime();
81	+	while (!lock.hasQueuedThread(t)) {
82	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	+	throw new AssertionError("timed out");
84	+	Thread.yield();
85	+	}
86	+	assertTrue(t.isAlive());
87	+	assertTrue(lock.getOwner() != t);
88	+	}
89	+
90	+	/**
91	+	* Checks that lock is not write-locked.
92	+	*/
93	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	+	assertFalse(lock.isWriteLocked());
95	+	assertFalse(lock.isWriteLockedByCurrentThread());
96	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	+	assertNull(lock.getOwner());
98	+	assertEquals(0, lock.getWriteHoldCount());
99	+	}
100	+
101	+	/**
102	+	* Checks that lock is write-locked by the given thread.
103	+	*/
104	+	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
105	+	assertTrue(lock.isWriteLocked());
106	+	assertSame(t, lock.getOwner());
107	+	assertEquals(t == Thread.currentThread(),
108	+	lock.isWriteLockedByCurrentThread());
109	+	assertEquals(t == Thread.currentThread(),
110	+	lock.writeLock().isHeldByCurrentThread());
111	+	assertEquals(t == Thread.currentThread(),
112	+	lock.getWriteHoldCount() > 0);
113	+	assertEquals(0, lock.getReadLockCount());
114	+	}
115	+
116	+	/**
117	+	* Checks that condition c has no waiters.
118	+	*/
119	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	+	assertHasWaiters(lock, c, new Thread[] {});
121	+	}
122	+
123	+	/**
124	+	* Checks that condition c has exactly the given waiter threads.
125	+	*/
126	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
127	+	Thread... threads) {
128	+	lock.writeLock().lock();
129	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
130	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
131	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
132	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
133	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
134	+	new HashSet<Thread>(Arrays.asList(threads)));
135	+	lock.writeLock().unlock();
136	+	}
137	+
138	+	/**
139		* Constructor sets given fairness, and is in unlocked state
140		*/
141		public void testConstructor() {
142	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
143	<	assertFalse(rl.isFair());
144	<	assertFalse(rl.isWriteLocked());
145	<	assertEquals(0, rl.getReadLockCount());
146	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
147	<	assertTrue(r2.isFair());
148	<	assertFalse(r2.isWriteLocked());
149	<	assertEquals(0, r2.getReadLockCount());
150	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
151	<	assertFalse(r3.isFair());
152	<	assertFalse(r3.isWriteLocked());
153	<	assertEquals(0, r3.getReadLockCount());
142	>	PublicReentrantReadWriteLock lock;
143	>
144	>	lock = new PublicReentrantReadWriteLock();
145	>	assertFalse(lock.isFair());
146	>	assertNotWriteLocked(lock);
147	>	assertEquals(0, lock.getReadLockCount());
148	>
149	>	lock = new PublicReentrantReadWriteLock(true);
150	>	assertTrue(lock.isFair());
151	>	assertNotWriteLocked(lock);
152	>	assertEquals(0, lock.getReadLockCount());
153	>
154	>	lock = new PublicReentrantReadWriteLock(false);
155	>	assertFalse(lock.isFair());
156	>	assertNotWriteLocked(lock);
157	>	assertEquals(0, lock.getReadLockCount());
158		}
159
160		/**
161		* write-locking and read-locking an unlocked lock succeed
162		*/
163		public void testLock() {
164	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
165	<	rl.writeLock().lock();
166	<	assertTrue(rl.isWriteLocked());
167	<	assertTrue(rl.isWriteLockedByCurrentThread());
168	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
169	<	assertEquals(0, rl.getReadLockCount());
170	<	rl.writeLock().unlock();
171	<	assertFalse(rl.isWriteLocked());
172	<	assertFalse(rl.isWriteLockedByCurrentThread());
173	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
174	<	assertEquals(0, rl.getReadLockCount());
175	<	rl.readLock().lock();
176	<	assertFalse(rl.isWriteLocked());
95	<	assertFalse(rl.isWriteLockedByCurrentThread());
96	<	assertEquals(1, rl.getReadLockCount());
97	<	rl.readLock().unlock();
98	<	assertFalse(rl.isWriteLocked());
99	<	assertFalse(rl.isWriteLockedByCurrentThread());
100	<	assertEquals(0, rl.getReadLockCount());
164	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
165	>	assertNotWriteLocked(lock);
166	>	lock.writeLock().lock();
167	>	assertWriteLockedBy(lock, Thread.currentThread());
168	>	lock.writeLock().unlock();
169	>	assertNotWriteLocked(lock);
170	>	assertEquals(0, lock.getReadLockCount());
171	>	lock.readLock().lock();
172	>	assertNotWriteLocked(lock);
173	>	assertEquals(1, lock.getReadLockCount());
174	>	lock.readLock().unlock();
175	>	assertNotWriteLocked(lock);
176	>	assertEquals(0, lock.getReadLockCount());
177		}
178
103	–
179		/**
180		* locking an unlocked fair lock succeeds
181		*/
182		public void testFairLock() {
183	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
184	<	rl.writeLock().lock();
185	<	assertTrue(rl.isWriteLocked());
186	<	assertTrue(rl.isWriteLockedByCurrentThread());
187	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
188	<	assertEquals(0, rl.getReadLockCount());
189	<	rl.writeLock().unlock();
190	<	assertFalse(rl.isWriteLocked());
191	<	assertFalse(rl.isWriteLockedByCurrentThread());
192	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
193	<	assertEquals(0, rl.getReadLockCount());
194	<	rl.readLock().lock();
195	<	assertFalse(rl.isWriteLocked());
121	<	assertFalse(rl.isWriteLockedByCurrentThread());
122	<	assertEquals(1, rl.getReadLockCount());
123	<	rl.readLock().unlock();
124	<	assertFalse(rl.isWriteLocked());
125	<	assertFalse(rl.isWriteLockedByCurrentThread());
126	<	assertEquals(0, rl.getReadLockCount());
183	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
184	>	assertNotWriteLocked(lock);
185	>	lock.writeLock().lock();
186	>	assertWriteLockedBy(lock, Thread.currentThread());
187	>	lock.writeLock().unlock();
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>	lock.readLock().lock();
191	>	assertNotWriteLocked(lock);
192	>	assertEquals(1, lock.getReadLockCount());
193	>	lock.readLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196		}
197
198		/**
199		* getWriteHoldCount returns number of recursive holds
200		*/
201		public void testGetWriteHoldCount() {
202	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	<	for (int i = 1; i <= SIZE; i++) {
204	<	lock.writeLock().lock();
205	<	assertEquals(i,lock.getWriteHoldCount());
206	<	}
207	<	for (int i = SIZE; i > 0; i--) {
208	<	lock.writeLock().unlock();
209	<	assertEquals(i-1,lock.getWriteHoldCount());
210	<	}
202	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	>	for (int i = 1; i <= SIZE; i++) {
204	>	lock.writeLock().lock();
205	>	assertEquals(i,lock.getWriteHoldCount());
206	>	}
207	>	for (int i = SIZE; i > 0; i--) {
208	>	lock.writeLock().unlock();
209	>	assertEquals(i-1,lock.getWriteHoldCount());
210	>	}
211		}
212
213		/**
214		* WriteLock.getHoldCount returns number of recursive holds
215		*/
216		public void testGetHoldCount() {
217	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	<	for (int i = 1; i <= SIZE; i++) {
219	<	lock.writeLock().lock();
220	<	assertEquals(i,lock.writeLock().getHoldCount());
221	<	}
222	<	for (int i = SIZE; i > 0; i--) {
223	<	lock.writeLock().unlock();
224	<	assertEquals(i-1,lock.writeLock().getHoldCount());
225	<	}
217	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	>	for (int i = 1; i <= SIZE; i++) {
219	>	lock.writeLock().lock();
220	>	assertEquals(i,lock.writeLock().getHoldCount());
221	>	}
222	>	for (int i = SIZE; i > 0; i--) {
223	>	lock.writeLock().unlock();
224	>	assertEquals(i-1,lock.writeLock().getHoldCount());
225	>	}
226		}
227
228		/**
229		* getReadHoldCount returns number of recursive holds
230		*/
231		public void testGetReadHoldCount() {
232	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	<	for (int i = 1; i <= SIZE; i++) {
234	<	lock.readLock().lock();
235	<	assertEquals(i,lock.getReadHoldCount());
236	<	}
237	<	for (int i = SIZE; i > 0; i--) {
238	<	lock.readLock().unlock();
239	<	assertEquals(i-1,lock.getReadHoldCount());
240	<	}
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.readLock().lock();
235	>	assertEquals(i,lock.getReadHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238	>	lock.readLock().unlock();
239	>	assertEquals(i-1,lock.getReadHoldCount());
240	>	}
241		}
242
174	–
243		/**
244		* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testUnlock_IllegalMonitorStateException() {
247	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
248	<	try {
249	<	rl.writeLock().unlock();
250	<	shouldThrow();
251	<	} catch (IllegalMonitorStateException success) {}
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	>	try {
249	>	lock.writeLock().unlock();
250	>	shouldThrow();
251	>	} catch (IllegalMonitorStateException success) {}
252		}
253
254	+	/**
255	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
256	+	*/
257	+	public void testReadUnlock_IllegalMonitorStateException() {
258	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259	+	try {
260	+	lock.readLock().unlock();
261	+	shouldThrow();
262	+	} catch (IllegalMonitorStateException success) {}
263	+	}
264
265		/**
266		* write-lockInterruptibly is interruptible
267		*/
268		public void testWriteLockInterruptibly_Interrupted() throws Exception {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
192	<	Thread t = new Thread(new Runnable() {
193	<	public void run() {
194	<	try {
195	<	lock.writeLock().lockInterruptibly();
196	<	lock.writeLock().unlock();
197	<	lock.writeLock().lockInterruptibly();
198	<	lock.writeLock().unlock();
199	<	} catch (InterruptedException success) {}
200	<	}
201	<	});
202	<
269	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
270		lock.writeLock().lock();
271	<	t.start();
272	<	Thread.sleep(SHORT_DELAY_MS);
271	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	lock.writeLock().lockInterruptibly();
274	>	}});
275	>
276	>	waitForQueuedThread(lock, t);
277		t.interrupt();
278	<	Thread.sleep(SHORT_DELAY_MS);
279	<	lock.writeLock().unlock();
209	<	t.join();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280		}
281
282		/**
283		* timed write-tryLock is interruptible
284		*/
285		public void testWriteTryLock_Interrupted() throws InterruptedException {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287	<	lock.writeLock().lock();
288	<	Thread t = new Thread(new Runnable() {
289	<	public void run() {
290	<	try {
291	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
222	<	} catch (InterruptedException success) {}
223	<	}
224	<	});
286	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
287	>	lock.writeLock().lock();
288	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
289	>	public void realRun() throws InterruptedException {
290	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
291	>	}});
292
293	<	t.start();
293	>	waitForQueuedThread(lock, t);
294		t.interrupt();
295	<	lock.writeLock().unlock();
296	<	t.join();
295	>	awaitTermination(t);
296	>	releaseWriteLock(lock);
297		}
298
299		/**
300		* read-lockInterruptibly is interruptible
301		*/
302		public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	<	lock.writeLock().lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	try {
308	<	lock.readLock().lockInterruptibly();
242	<	} catch (InterruptedException success) {}
243	<	}
244	<	});
303	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
304	>	lock.writeLock().lock();
305	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
306	>	public void realRun() throws InterruptedException {
307	>	lock.readLock().lockInterruptibly();
308	>	}});
309
310	<	t.start();
247	<	Thread.sleep(SHORT_DELAY_MS);
310	>	waitForQueuedThread(lock, t);
311		t.interrupt();
312	<	Thread.sleep(SHORT_DELAY_MS);
313	<	lock.writeLock().unlock();
251	<	t.join();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314		}
315
316		/**
317		* timed read-tryLock is interruptible
318		*/
319		public void testReadTryLock_Interrupted() throws InterruptedException {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
321	<	lock.writeLock().lock();
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	try {
325	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
264	<	threadShouldThrow();
265	<	} catch (InterruptedException success) {}
266	<	}
267	<	});
320	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
321	>	lock.writeLock().lock();
322	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
323	>	public void realRun() throws InterruptedException {
324	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
325	>	}});
326
327	<	t.start();
327	>	waitForQueuedThread(lock, t);
328		t.interrupt();
329	<	t.join();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331		}
332
274	–
333		/**
334		* write-tryLock fails if locked
335		*/
336		public void testWriteTryLockWhenLocked() throws InterruptedException {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
338	<	lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	threadAssertFalse(lock.writeLock().tryLock());
342	<	}
285	<	});
337	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
338	>	lock.writeLock().lock();
339	>	Thread t = newStartedThread(new CheckedRunnable() {
340	>	public void realRun() {
341	>	assertFalse(lock.writeLock().tryLock());
342	>	}});
343
344	<	t.start();
345	<	t.join();
289	<	lock.writeLock().unlock();
344	>	awaitTermination(t);
345	>	releaseWriteLock(lock);
346		}
347
348		/**
349		* read-tryLock fails if locked
350		*/
351		public void testReadTryLockWhenLocked() throws InterruptedException {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
353	<	lock.writeLock().lock();
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	threadAssertFalse(lock.readLock().tryLock());
357	<	}
302	<	});
352	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
353	>	lock.writeLock().lock();
354	>	Thread t = newStartedThread(new CheckedRunnable() {
355	>	public void realRun() {
356	>	assertFalse(lock.readLock().tryLock());
357	>	}});
358
359	<	t.start();
360	<	t.join();
306	<	lock.writeLock().unlock();
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361		}
362
363		/**
364		* Multiple threads can hold a read lock when not write-locked
365		*/
366		public void testMultipleReadLocks() throws InterruptedException {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	lock.readLock().lock();
369	<	Thread t = new Thread(new Runnable() {
370	<	public void run() {
371	<	threadAssertTrue(lock.readLock().tryLock());
372	<	lock.readLock().unlock();
373	<	}
320	<	});
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	assertTrue(lock.readLock().tryLock());
372	>	lock.readLock().unlock();
373	>	}});
374
375	<	t.start();
323	<	t.join();
375	>	awaitTermination(t);
376		lock.readLock().unlock();
377		}
378
379		/**
380	<	* A writelock succeeds after reading threads unlock
380	>	* A writelock succeeds only after a reading thread unlocks
381	>	*/
382	>	public void testWriteAfterReadLock() throws InterruptedException {
383	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
384	>	lock.readLock().lock();
385	>
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387	>	public void realRun() {
388	>	assertEquals(1, lock.getReadLockCount());
389	>	lock.writeLock().lock();
390	>	assertEquals(0, lock.getReadLockCount());
391	>	lock.writeLock().unlock();
392	>	}});
393	>	waitForQueuedThread(lock, t);
394	>	assertNotWriteLocked(lock);
395	>	assertEquals(1, lock.getReadLockCount());
396	>	lock.readLock().unlock();
397	>	assertEquals(0, lock.getReadLockCount());
398	>	awaitTermination(t);
399	>	assertNotWriteLocked(lock);
400	>	}
401	>
402	>	/**
403	>	* A writelock succeeds only after reading threads unlock
404		*/
405		public void testWriteAfterMultipleReadLocks() throws InterruptedException {
406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
407	<	lock.readLock().lock();
408	<	Thread t1 = new Thread(new Runnable() {
409	<	public void run() {
410	<	lock.readLock().lock();
411	<	lock.readLock().unlock();
412	<	}
413	<	});
414	<	Thread t2 = new Thread(new Runnable() {
415	<	public void run() {
416	<	lock.writeLock().lock();
417	<	lock.writeLock().unlock();
418	<	}
419	<	});
406	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
407	>	lock.readLock().lock();
408	>	lock.readLock().lock();
409	>	Thread t1 = newStartedThread(new CheckedRunnable() {
410	>	public void realRun() {
411	>	lock.readLock().lock();
412	>	assertEquals(3, lock.getReadLockCount());
413	>	lock.readLock().unlock();
414	>	}});
415	>	awaitTermination(t1);
416	>
417	>	Thread t2 = newStartedThread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	assertEquals(2, lock.getReadLockCount());
420	>	lock.writeLock().lock();
421	>	assertEquals(0, lock.getReadLockCount());
422	>	lock.writeLock().unlock();
423	>	}});
424	>	waitForQueuedThread(lock, t2);
425	>	assertNotWriteLocked(lock);
426	>	assertEquals(2, lock.getReadLockCount());
427	>	lock.readLock().unlock();
428	>	lock.readLock().unlock();
429	>	assertEquals(0, lock.getReadLockCount());
430	>	awaitTermination(t2);
431	>	assertNotWriteLocked(lock);
432	>	}
433
434	<	t1.start();
435	<	t2.start();
436	<	Thread.sleep(SHORT_DELAY_MS);
434	>	/**
435	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
436	>	* will block if there is a waiting writer thread.
437	>	*/
438	>	public void testReaderWriterReaderFairFifo() throws InterruptedException {
439	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
440	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
441	>
442	>	lock.readLock().lock();
443	>	Thread t1 = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() {
445	>	assertEquals(1, lock.getReadLockCount());
446	>	lock.writeLock().lock();
447	>	assertEquals(0, lock.getReadLockCount());
448	>	t1GotLock.set(true);
449	>	lock.writeLock().unlock();
450	>	}});
451	>	waitForQueuedThread(lock, t1);
452	>
453	>	Thread t2 = newStartedThread(new CheckedRunnable() {
454	>	public void realRun() {
455	>	assertEquals(1, lock.getReadLockCount());
456	>	lock.readLock().lock();
457	>	assertEquals(1, lock.getReadLockCount());
458	>	assertTrue(t1GotLock.get());
459	>	lock.readLock().unlock();
460	>	}});
461	>	waitForQueuedThread(lock, t2);
462	>	assertTrue(t1.isAlive());
463	>	assertNotWriteLocked(lock);
464	>	assertEquals(1, lock.getReadLockCount());
465		lock.readLock().unlock();
466	<	t1.join(MEDIUM_DELAY_MS);
467	<	t2.join(MEDIUM_DELAY_MS);
468	<	assertTrue(!t1.isAlive());
353	<	assertTrue(!t2.isAlive());
466	>	awaitTermination(t1);
467	>	awaitTermination(t2);
468	>	assertNotWriteLocked(lock);
469		}
470
471		/**
472	<	* Readlocks succeed after a writing thread unlocks
472	>	* Readlocks succeed only after a writing thread unlocks
473		*/
474		public void testReadAfterWriteLock() throws InterruptedException {
475	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
476	<	lock.writeLock().lock();
477	<	Thread t1 = new Thread(new Runnable() {
478	<	public void run() {
479	<	lock.readLock().lock();
480	<	lock.readLock().unlock();
481	<	}
482	<	});
483	<	Thread t2 = new Thread(new Runnable() {
484	<	public void run() {
485	<	lock.readLock().lock();
486	<	lock.readLock().unlock();
487	<	}
488	<	});
489	<
490	<	t1.start();
491	<	t2.start();
492	<	Thread.sleep(SHORT_DELAY_MS);
378	<	lock.writeLock().unlock();
379	<	t1.join(MEDIUM_DELAY_MS);
380	<	t2.join(MEDIUM_DELAY_MS);
381	<	assertTrue(!t1.isAlive());
382	<	assertTrue(!t2.isAlive());
475	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
476	>	lock.writeLock().lock();
477	>	Thread t1 = newStartedThread(new CheckedRunnable() {
478	>	public void realRun() {
479	>	lock.readLock().lock();
480	>	lock.readLock().unlock();
481	>	}});
482	>	Thread t2 = newStartedThread(new CheckedRunnable() {
483	>	public void realRun() {
484	>	lock.readLock().lock();
485	>	lock.readLock().unlock();
486	>	}});
487	>
488	>	waitForQueuedThread(lock, t1);
489	>	waitForQueuedThread(lock, t2);
490	>	releaseWriteLock(lock);
491	>	awaitTermination(t1);
492	>	awaitTermination(t2);
493		}
494
495		/**
496		* Read trylock succeeds if write locked by current thread
497		*/
498		public void testReadHoldingWriteLock() {
499	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
500	<	lock.writeLock().lock();
499	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
500	>	lock.writeLock().lock();
501		assertTrue(lock.readLock().tryLock());
502		lock.readLock().unlock();
503		lock.writeLock().unlock();
#	Line 398 | Line 508 | public class ReentrantReadWriteLockTest
508		* other threads are waiting for readlock
509		*/
510		public void testReadHoldingWriteLock2() throws InterruptedException {
511	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
512	<	lock.writeLock().lock();
403	<	Thread t1 = new Thread(new Runnable() {
404	<	public void run() {
405	<	lock.readLock().lock();
406	<	lock.readLock().unlock();
407	<	}
408	<	});
409	<	Thread t2 = new Thread(new Runnable() {
410	<	public void run() {
411	<	lock.readLock().lock();
412	<	lock.readLock().unlock();
413	<	}
414	<	});
415	<
416	<	t1.start();
417	<	t2.start();
511	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
512	>	lock.writeLock().lock();
513		lock.readLock().lock();
514		lock.readLock().unlock();
515	<	Thread.sleep(SHORT_DELAY_MS);
515	>
516	>	Thread t1 = newStartedThread(new CheckedRunnable() {
517	>	public void realRun() {
518	>	lock.readLock().lock();
519	>	lock.readLock().unlock();
520	>	}});
521	>	Thread t2 = newStartedThread(new CheckedRunnable() {
522	>	public void realRun() {
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	}});
526	>
527	>	waitForQueuedThread(lock, t1);
528	>	waitForQueuedThread(lock, t2);
529	>	assertWriteLockedBy(lock, Thread.currentThread());
530		lock.readLock().lock();
531		lock.readLock().unlock();
532	<	lock.writeLock().unlock();
533	<	t1.join(MEDIUM_DELAY_MS);
534	<	t2.join(MEDIUM_DELAY_MS);
426	<	assertTrue(!t1.isAlive());
427	<	assertTrue(!t2.isAlive());
532	>	releaseWriteLock(lock);
533	>	awaitTermination(t1);
534	>	awaitTermination(t2);
535		}
536
537		/**
538	<	*  Read lock succeeds if write locked by current thread even if
538	>	* Read lock succeeds if write locked by current thread even if
539		* other threads are waiting for writelock
540		*/
541		public void testReadHoldingWriteLock3() throws InterruptedException {
542	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
543	<	lock.writeLock().lock();
437	<	Thread t1 = new Thread(new Runnable() {
438	<	public void run() {
439	<	lock.writeLock().lock();
440	<	lock.writeLock().unlock();
441	<	}
442	<	});
443	<	Thread t2 = new Thread(new Runnable() {
444	<	public void run() {
445	<	lock.writeLock().lock();
446	<	lock.writeLock().unlock();
447	<	}
448	<	});
449	<
450	<	t1.start();
451	<	t2.start();
542	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543	>	lock.writeLock().lock();
544		lock.readLock().lock();
545		lock.readLock().unlock();
546	<	Thread.sleep(SHORT_DELAY_MS);
546	>
547	>	Thread t1 = newStartedThread(new CheckedRunnable() {
548	>	public void realRun() {
549	>	lock.writeLock().lock();
550	>	lock.writeLock().unlock();
551	>	}});
552	>	Thread t2 = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() {
554	>	lock.writeLock().lock();
555	>	lock.writeLock().unlock();
556	>	}});
557	>
558	>	waitForQueuedThread(lock, t1);
559	>	waitForQueuedThread(lock, t2);
560	>	assertWriteLockedBy(lock, Thread.currentThread());
561		lock.readLock().lock();
562		lock.readLock().unlock();
563	<	lock.writeLock().unlock();
564	<	t1.join(MEDIUM_DELAY_MS);
565	<	t2.join(MEDIUM_DELAY_MS);
460	<	assertTrue(!t1.isAlive());
461	<	assertTrue(!t2.isAlive());
563	>	releaseWriteLock(lock);
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566		}
567
464	–
568		/**
569	<	*  Write lock succeeds if write locked by current thread even if
569	>	* Write lock succeeds if write locked by current thread even if
570		* other threads are waiting for writelock
571		*/
572		public void testWriteHoldingWriteLock4() throws InterruptedException {
573	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
471	<	lock.writeLock().lock();
472	<	Thread t1 = new Thread(new Runnable() {
473	<	public void run() {
474	<	lock.writeLock().lock();
475	<	lock.writeLock().unlock();
476	<	}
477	<	});
478	<	Thread t2 = new Thread(new Runnable() {
479	<	public void run() {
480	<	lock.writeLock().lock();
481	<	lock.writeLock().unlock();
482	<	}
483	<	});
484	<
485	<	t1.start();
486	<	t2.start();
573	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574		lock.writeLock().lock();
488	–	lock.writeLock().unlock();
489	–	Thread.sleep(SHORT_DELAY_MS);
575		lock.writeLock().lock();
576		lock.writeLock().unlock();
577	+
578	+	Thread t1 = newStartedThread(new CheckedRunnable() {
579	+	public void realRun() {
580	+	lock.writeLock().lock();
581	+	lock.writeLock().unlock();
582	+	}});
583	+	Thread t2 = newStartedThread(new CheckedRunnable() {
584	+	public void realRun() {
585	+	lock.writeLock().lock();
586	+	lock.writeLock().unlock();
587	+	}});
588	+
589	+	waitForQueuedThread(lock, t1);
590	+	waitForQueuedThread(lock, t2);
591	+	assertWriteLockedBy(lock, Thread.currentThread());
592	+	assertEquals(1, lock.getWriteHoldCount());
593	+	lock.writeLock().lock();
594	+	assertWriteLockedBy(lock, Thread.currentThread());
595	+	assertEquals(2, lock.getWriteHoldCount());
596		lock.writeLock().unlock();
597	<	t1.join(MEDIUM_DELAY_MS);
598	<	t2.join(MEDIUM_DELAY_MS);
599	<	assertTrue(!t1.isAlive());
496	<	assertTrue(!t2.isAlive());
597	>	releaseWriteLock(lock);
598	>	awaitTermination(t1);
599	>	awaitTermination(t2);
600		}
601
499	–
602		/**
603		* Fair Read trylock succeeds if write locked by current thread
604		*/
605		public void testReadHoldingWriteLockFair() {
606	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	<	lock.writeLock().lock();
606	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	>	lock.writeLock().lock();
608		assertTrue(lock.readLock().tryLock());
609		lock.readLock().unlock();
610		lock.writeLock().unlock();
#	Line 513 | Line 615 | public class ReentrantReadWriteLockTest
615		* other threads are waiting for readlock
616		*/
617		public void testReadHoldingWriteLockFair2() throws InterruptedException {
618	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
619	<	lock.writeLock().lock();
518	<	Thread t1 = new Thread(new Runnable() {
519	<	public void run() {
520	<	lock.readLock().lock();
521	<	lock.readLock().unlock();
522	<	}
523	<	});
524	<	Thread t2 = new Thread(new Runnable() {
525	<	public void run() {
526	<	lock.readLock().lock();
527	<	lock.readLock().unlock();
528	<	}
529	<	});
530	<
531	<	t1.start();
532	<	t2.start();
618	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
619	>	lock.writeLock().lock();
620		lock.readLock().lock();
621		lock.readLock().unlock();
622	<	Thread.sleep(SHORT_DELAY_MS);
622	>
623	>	Thread t1 = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	lock.readLock().lock();
626	>	lock.readLock().unlock();
627	>	}});
628	>	Thread t2 = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	lock.readLock().lock();
631	>	lock.readLock().unlock();
632	>	}});
633	>
634	>	waitForQueuedThread(lock, t1);
635	>	waitForQueuedThread(lock, t2);
636	>	assertWriteLockedBy(lock, Thread.currentThread());
637		lock.readLock().lock();
638		lock.readLock().unlock();
639	<	lock.writeLock().unlock();
640	<	t1.join(MEDIUM_DELAY_MS);
641	<	t2.join(MEDIUM_DELAY_MS);
541	<	assertTrue(!t1.isAlive());
542	<	assertTrue(!t2.isAlive());
639	>	releaseWriteLock(lock);
640	>	awaitTermination(t1);
641	>	awaitTermination(t2);
642		}
643
545	–
644		/**
645		* Fair Read lock succeeds if write locked by current thread even if
646		* other threads are waiting for writelock
647		*/
648		public void testReadHoldingWriteLockFair3() throws InterruptedException {
649	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
650	<	lock.writeLock().lock();
553	<	Thread t1 = new Thread(new Runnable() {
554	<	public void run() {
555	<	lock.writeLock().lock();
556	<	lock.writeLock().unlock();
557	<	}
558	<	});
559	<	Thread t2 = new Thread(new Runnable() {
560	<	public void run() {
561	<	lock.writeLock().lock();
562	<	lock.writeLock().unlock();
563	<	}
564	<	});
565	<
566	<	t1.start();
567	<	t2.start();
649	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
650	>	lock.writeLock().lock();
651		lock.readLock().lock();
652		lock.readLock().unlock();
653	<	Thread.sleep(SHORT_DELAY_MS);
653	>
654	>	Thread t1 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.writeLock().lock();
657	>	lock.writeLock().unlock();
658	>	}});
659	>	Thread t2 = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	lock.writeLock().lock();
662	>	lock.writeLock().unlock();
663	>	}});
664	>
665	>	waitForQueuedThread(lock, t1);
666	>	waitForQueuedThread(lock, t2);
667	>	assertWriteLockedBy(lock, Thread.currentThread());
668		lock.readLock().lock();
669		lock.readLock().unlock();
670	<	lock.writeLock().unlock();
671	<	t1.join(MEDIUM_DELAY_MS);
672	<	t2.join(MEDIUM_DELAY_MS);
576	<	assertTrue(!t1.isAlive());
577	<	assertTrue(!t2.isAlive());
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673		}
674
580	–
675		/**
676		* Fair Write lock succeeds if write locked by current thread even if
677		* other threads are waiting for writelock
678		*/
679		public void testWriteHoldingWriteLockFair4() throws InterruptedException {
680	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
587	<	lock.writeLock().lock();
588	<	Thread t1 = new Thread(new Runnable() {
589	<	public void run() {
590	<	lock.writeLock().lock();
591	<	lock.writeLock().unlock();
592	<	}
593	<	});
594	<	Thread t2 = new Thread(new Runnable() {
595	<	public void run() {
596	<	lock.writeLock().lock();
597	<	lock.writeLock().unlock();
598	<	}
599	<	});
600	<
601	<	t1.start();
602	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	assertTrue(lock.isWriteLockedByCurrentThread());
605	<	assertTrue(lock.getWriteHoldCount() == 1);
680	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
681		lock.writeLock().lock();
682	<	assertTrue(lock.getWriteHoldCount() == 2);
682	>	Thread t1 = newStartedThread(new CheckedRunnable() {
683	>	public void realRun() {
684	>	lock.writeLock().lock();
685	>	lock.writeLock().unlock();
686	>	}});
687	>	Thread t2 = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() {
689	>	lock.writeLock().lock();
690	>	lock.writeLock().unlock();
691	>	}});
692	>
693	>	waitForQueuedThread(lock, t1);
694	>	waitForQueuedThread(lock, t2);
695	>	assertWriteLockedBy(lock, Thread.currentThread());
696	>	assertEquals(1, lock.getWriteHoldCount());
697	>	lock.writeLock().lock();
698	>	assertEquals(2, lock.getWriteHoldCount());
699		lock.writeLock().unlock();
700		lock.writeLock().lock();
701		lock.writeLock().unlock();
702	<	lock.writeLock().unlock();
703	<	t1.join(MEDIUM_DELAY_MS);
704	<	t2.join(MEDIUM_DELAY_MS);
614	<	assertTrue(!t1.isAlive());
615	<	assertTrue(!t2.isAlive());
702	>	releaseWriteLock(lock);
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705		}
706
618	–
707		/**
708		* Read tryLock succeeds if readlocked but not writelocked
709		*/
710		public void testTryLockWhenReadLocked() throws InterruptedException {
711	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	<	lock.readLock().lock();
713	<	Thread t = new Thread(new Runnable() {
714	<	public void run() {
715	<	threadAssertTrue(lock.readLock().tryLock());
716	<	lock.readLock().unlock();
717	<	}
630	<	});
711	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	>	lock.readLock().lock();
713	>	Thread t = newStartedThread(new CheckedRunnable() {
714	>	public void realRun() {
715	>	assertTrue(lock.readLock().tryLock());
716	>	lock.readLock().unlock();
717	>	}});
718
719	<	t.start();
633	<	t.join();
719	>	awaitTermination(t);
720		lock.readLock().unlock();
721		}
722
637	–
638	–
723		/**
724		* write tryLock fails when readlocked
725		*/
726		public void testWriteTryLockWhenReadLocked() throws InterruptedException {
727	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	<	lock.readLock().lock();
729	<	Thread t = new Thread(new Runnable() {
730	<	public void run() {
731	<	threadAssertFalse(lock.writeLock().tryLock());
732	<	}
649	<	});
727	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	>	lock.readLock().lock();
729	>	Thread t = newStartedThread(new CheckedRunnable() {
730	>	public void realRun() {
731	>	assertFalse(lock.writeLock().tryLock());
732	>	}});
733
734	<	t.start();
652	<	t.join();
734	>	awaitTermination(t);
735		lock.readLock().unlock();
736		}
737
656	–
738		/**
739		* Fair Read tryLock succeeds if readlocked but not writelocked
740		*/
741		public void testTryLockWhenReadLockedFair() throws InterruptedException {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	<	lock.readLock().lock();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	threadAssertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}
668	<	});
742	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	>	lock.readLock().lock();
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() {
746	>	assertTrue(lock.readLock().tryLock());
747	>	lock.readLock().unlock();
748	>	}});
749
750	<	t.start();
671	<	t.join();
750	>	awaitTermination(t);
751		lock.readLock().unlock();
752		}
753
675	–
676	–
754		/**
755		* Fair write tryLock fails when readlocked
756		*/
757		public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759	<	lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
687	<	});
758	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759	>	lock.readLock().lock();
760	>	Thread t = newStartedThread(new CheckedRunnable() {
761	>	public void realRun() {
762	>	assertFalse(lock.writeLock().tryLock());
763	>	}});
764
765	<	t.start();
690	<	t.join();
765	>	awaitTermination(t);
766		lock.readLock().unlock();
767		}
768
694	–
695	–
769		/**
770		* write timed tryLock times out if locked
771		*/
772		public void testWriteTryLock_Timeout() throws InterruptedException {
773	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	<	lock.writeLock().lock();
775	<	Thread t = new Thread(new Runnable() {
776	<	public void run() {
777	<	try {
778	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
706	<	} catch (Exception ex) {
707	<	threadUnexpectedException();
708	<	}
709	<	}
710	<	});
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	>	lock.writeLock().lock();
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776	>	public void realRun() throws InterruptedException {
777	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
778	>	}});
779
780	<	t.start();
781	<	t.join();
780	>	awaitTermination(t);
781	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
782		lock.writeLock().unlock();
783		}
784
#	Line 718 | Line 786 | public class ReentrantReadWriteLockTest
786		* read timed tryLock times out if write-locked
787		*/
788		public void testReadTryLock_Timeout() throws InterruptedException {
789	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	<	lock.writeLock().lock();
791	<	Thread t = new Thread(new Runnable() {
792	<	public void run() {
793	<	try {
794	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
727	<	} catch (Exception ex) {
728	<	threadUnexpectedException();
729	<	}
730	<	}
731	<	});
789	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	>	lock.writeLock().lock();
791	>	Thread t = newStartedThread(new CheckedRunnable() {
792	>	public void realRun() throws InterruptedException {
793	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
794	>	}});
795
796	<	t.start();
797	<	t.join();
796	>	awaitTermination(t);
797	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
798		lock.writeLock().unlock();
799		}
800
738	–
801		/**
802		* write lockInterruptibly succeeds if lock free else is interruptible
803		*/
804		public void testWriteLockInterruptibly() throws InterruptedException {
805	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
805	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
806		lock.writeLock().lockInterruptibly();
807	<	Thread t = new Thread(new Runnable() {
808	<	public void run() {
809	<	try {
810	<	lock.writeLock().lockInterruptibly();
749	<	threadShouldThrow();
750	<	}
751	<	catch (InterruptedException success) {
752	<	}
753	<	}
754	<	});
807	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
808	>	public void realRun() throws InterruptedException {
809	>	lock.writeLock().lockInterruptibly();
810	>	}});
811
812	<	t.start();
757	<	Thread.sleep(SHORT_DELAY_MS);
812	>	waitForQueuedThread(lock, t);
813		t.interrupt();
814	<	Thread.sleep(SHORT_DELAY_MS);
815	<	t.join();
761	<	lock.writeLock().unlock();
814	>	awaitTermination(t);
815	>	releaseWriteLock(lock);
816		}
817
818		/**
819	<	*  read lockInterruptibly succeeds if lock free else is interruptible
819	>	* read lockInterruptibly succeeds if lock free else is interruptible
820		*/
821		public void testReadLockInterruptibly() throws InterruptedException {
822	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
822	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
823		lock.writeLock().lockInterruptibly();
824	<	Thread t = new Thread(new Runnable() {
825	<	public void run() {
826	<	try {
827	<	lock.readLock().lockInterruptibly();
774	<	threadShouldThrow();
775	<	}
776	<	catch (InterruptedException success) {
777	<	}
778	<	}
779	<	});
824	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	lock.readLock().lockInterruptibly();
827	>	}});
828
829	<	t.start();
782	<	Thread.sleep(SHORT_DELAY_MS);
829	>	waitForQueuedThread(lock, t);
830		t.interrupt();
831	<	t.join();
832	<	lock.writeLock().unlock();
831	>	awaitTermination(t);
832	>	releaseWriteLock(lock);
833		}
834
835		/**
836		* Calling await without holding lock throws IllegalMonitorStateException
837		*/
838		public void testAwait_IllegalMonitor() throws InterruptedException {
839	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
839	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840		final Condition c = lock.writeLock().newCondition();
841		try {
842		c.await();
843		shouldThrow();
844		} catch (IllegalMonitorStateException success) {}
845	+	try {
846	+	c.await(LONG_DELAY_MS, MILLISECONDS);
847	+	shouldThrow();
848	+	} catch (IllegalMonitorStateException success) {}
849	+	try {
850	+	c.awaitNanos(100);
851	+	shouldThrow();
852	+	} catch (IllegalMonitorStateException success) {}
853	+	try {
854	+	c.awaitUninterruptibly();
855	+	shouldThrow();
856	+	} catch (IllegalMonitorStateException success) {}
857		}
858
859		/**
860		* Calling signal without holding lock throws IllegalMonitorStateException
861		*/
862		public void testSignal_IllegalMonitor() {
863	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
864		final Condition c = lock.writeLock().newCondition();
865		try {
866		c.signal();
#	Line 810 | Line 869 | public class ReentrantReadWriteLockTest
869		}
870
871		/**
872	+	* Calling signalAll without holding lock throws IllegalMonitorStateException
873	+	*/
874	+	public void testSignalAll_IllegalMonitor() {
875	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
876	+	final Condition c = lock.writeLock().newCondition();
877	+	try {
878	+	c.signalAll();
879	+	shouldThrow();
880	+	} catch (IllegalMonitorStateException success) {}
881	+	}
882	+
883	+	/**
884		* awaitNanos without a signal times out
885		*/
886		public void testAwaitNanos_Timeout() throws InterruptedException {
887	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
887	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888		final Condition c = lock.writeLock().newCondition();
818	–
889		lock.writeLock().lock();
890	<	long t = c.awaitNanos(100);
891	<	assertTrue(t <= 0);
890	>	long startTime = System.nanoTime();
891	>	long timeoutMillis = 10;
892	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
893	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
894	>	assertTrue(nanosRemaining <= 0);
895	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
896		lock.writeLock().unlock();
897		}
898
825	–
899		/**
900	<	*  timed await without a signal times out
900	>	* timed await without a signal times out
901		*/
902	<	public void testAwait_Timeout() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	public void testAwait_Timeout() throws InterruptedException {
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904		final Condition c = lock.writeLock().newCondition();
905		lock.writeLock().lock();
906	+	long startTime = System.nanoTime();
907	+	long timeoutMillis = 10;
908	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
909	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
910		lock.writeLock().unlock();
911		}
912
913		/**
914		* awaitUntil without a signal times out
915		*/
916	<	public void testAwaitUntil_Timeout() {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
916	>	public void testAwaitUntil_Timeout() throws InterruptedException {
917	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918		final Condition c = lock.writeLock().newCondition();
919		lock.writeLock().lock();
920		java.util.Date d = new java.util.Date();
921	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
922		lock.writeLock().unlock();
923		}
924
#	Line 848 | Line 926 | public class ReentrantReadWriteLockTest
926		* await returns when signalled
927		*/
928		public void testAwait() throws InterruptedException {
929	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
929	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new Runnable() {
932	<	public void run() {
933	<	try {
934	<	lock.writeLock().lock();
935	<	c.await();
936	<	lock.writeLock().unlock();
937	<	}
938	<	catch (InterruptedException e) {
861	<	threadUnexpectedException();
862	<	}
863	<	}
864	<	});
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	lock.writeLock().lock();
935	>	locked.countDown();
936	>	c.await();
937	>	lock.writeLock().unlock();
938	>	}});
939
940	<	t.start();
867	<	Thread.sleep(SHORT_DELAY_MS);
940	>	locked.await();
941		lock.writeLock().lock();
942		c.signal();
943	+	assertTrue(t.isAlive());
944		lock.writeLock().unlock();
945	<	t.join(SHORT_DELAY_MS);
872	<	assertFalse(t.isAlive());
873	<	}
874	<
875	<	/** A helper class for uninterruptible wait tests */
876	<	class UninterruptableThread extends Thread {
877	<	private Lock lock;
878	<	private Condition c;
879	<
880	<	public volatile boolean canAwake = false;
881	<	public volatile boolean interrupted = false;
882	<	public volatile boolean lockStarted = false;
883	<
884	<	public UninterruptableThread(Lock lock, Condition c) {
885	<	this.lock = lock;
886	<	this.c = c;
887	<	}
888	<
889	<	public synchronized void run() {
890	<	lock.lock();
891	<	lockStarted = true;
892	<
893	<	while (!canAwake) {
894	<	c.awaitUninterruptibly();
895	<	}
896	<
897	<	interrupted = isInterrupted();
898	<	lock.unlock();
899	<	}
945	>	awaitTermination(t);
946		}
947
948		/**
#	Line 905 | Line 951 | public class ReentrantReadWriteLockTest
951		public void testAwaitUninterruptibly() throws InterruptedException {
952		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953		final Condition c = lock.writeLock().newCondition();
954	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
955	<
956	<	thread.start();
957	<
958	<	while (!thread.lockStarted) {
959	<	Thread.sleep(100);
960	<	}
954	>	final CountDownLatch locked = new CountDownLatch(1);
955	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
956	>	Thread t = newStartedThread(new CheckedRunnable() {
957	>	public void realRun() {
958	>	lock.writeLock().lock();
959	>	locked.countDown();
960	>	c.awaitUninterruptibly();
961	>	assertTrue(Thread.interrupted());
962	>	lock.writeLock().unlock();
963	>	}});
964
965	+	locked.await();
966		lock.writeLock().lock();
967	<	try {
968	<	thread.interrupt();
969	<	thread.canAwake = true;
970	<	c.signal();
971	<	} finally {
972	<	lock.writeLock().unlock();
973	<	}
974	<
925	<	thread.join();
926	<	assertTrue(thread.interrupted);
927	<	assertFalse(thread.isAlive());
967	>	lock.writeLock().unlock();
968	>	t.interrupt();
969	>	t.join(10);
970	>	assertTrue(t.isAlive());
971	>	lock.writeLock().lock();
972	>	c.signal();
973	>	lock.writeLock().unlock();
974	>	awaitTermination(t);
975		}
976
977		/**
978		* await is interruptible
979		*/
980		public void testAwait_Interrupt() throws InterruptedException {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
981	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
982		final Condition c = lock.writeLock().newCondition();
983	<	Thread t = new Thread(new Runnable() {
984	<	public void run() {
985	<	try {
986	<	lock.writeLock().lock();
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	threadShouldThrow();
990	<	}
991	<	catch (InterruptedException success) {
992	<	}
993	<	}
994	<	});
983	>	final CountDownLatch locked = new CountDownLatch(1);
984	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
985	>	public void realRun() throws InterruptedException {
986	>	lock.writeLock().lock();
987	>	assertWriteLockedBy(lock, Thread.currentThread());
988	>	assertHasNoWaiters(lock, c);
989	>	locked.countDown();
990	>	try {
991	>	c.await();
992	>	} finally {
993	>	assertWriteLockedBy(lock, Thread.currentThread());
994	>	assertHasNoWaiters(lock, c);
995	>	lock.writeLock().unlock();
996	>	assertFalse(Thread.interrupted());
997	>	}
998	>	}});
999
1000	<	t.start();
1001	<	Thread.sleep(SHORT_DELAY_MS);
1000	>	locked.await();
1001	>	assertHasWaiters(lock, c, t);
1002		t.interrupt();
1003	<	t.join(SHORT_DELAY_MS);
1004	<	assertFalse(t.isAlive());
1003	>	awaitTermination(t);
1004	>	assertNotWriteLocked(lock);
1005		}
1006
1007		/**
1008		* awaitNanos is interruptible
1009		*/
1010		public void testAwaitNanos_Interrupt() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1011	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1012		final Condition c = lock.writeLock().newCondition();
1013	<	Thread t = new Thread(new Runnable() {
1014	<	public void run() {
1015	<	try {
1016	<	lock.writeLock().lock();
1017	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1018	<	lock.writeLock().unlock();
1019	<	threadShouldThrow();
1020	<	}
1021	<	catch (InterruptedException success) {
1022	<	}
1023	<	}
1024	<	});
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1015	>	public void realRun() throws InterruptedException {
1016	>	lock.writeLock().lock();
1017	>	assertWriteLockedBy(lock, Thread.currentThread());
1018	>	assertHasNoWaiters(lock, c);
1019	>	locked.countDown();
1020	>	try {
1021	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1022	>	} finally {
1023	>	assertWriteLockedBy(lock, Thread.currentThread());
1024	>	assertHasNoWaiters(lock, c);
1025	>	lock.writeLock().unlock();
1026	>	assertFalse(Thread.interrupted());
1027	>	}
1028	>	}});
1029
1030	<	t.start();
1031	<	Thread.sleep(SHORT_DELAY_MS);
1030	>	locked.await();
1031	>	assertHasWaiters(lock, c, t);
1032		t.interrupt();
1033	<	t.join(SHORT_DELAY_MS);
1034	<	assertFalse(t.isAlive());
1033	>	awaitTermination(t);
1034	>	assertNotWriteLocked(lock);
1035		}
1036
1037		/**
1038		* awaitUntil is interruptible
1039		*/
1040		public void testAwaitUntil_Interrupt() throws InterruptedException {
1041	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1041	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042		final Condition c = lock.writeLock().newCondition();
1043	<	Thread t = new Thread(new Runnable() {
1044	<	public void run() {
1045	<	try {
1046	<	lock.writeLock().lock();
1047	<	java.util.Date d = new java.util.Date();
1048	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1049	<	lock.writeLock().unlock();
1050	<	threadShouldThrow();
1051	<	}
1052	<	catch (InterruptedException success) {
1053	<	}
1054	<	}
1055	<	});
1043	>	final CountDownLatch locked = new CountDownLatch(1);
1044	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1045	>	public void realRun() throws InterruptedException {
1046	>	lock.writeLock().lock();
1047	>	assertWriteLockedBy(lock, Thread.currentThread());
1048	>	assertHasNoWaiters(lock, c);
1049	>	locked.countDown();
1050	>	java.util.Date d = new java.util.Date();
1051	>	try {
1052	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1053	>	} finally {
1054	>	assertWriteLockedBy(lock, Thread.currentThread());
1055	>	assertHasNoWaiters(lock, c);
1056	>	lock.writeLock().unlock();
1057	>	assertFalse(Thread.interrupted());
1058	>	}
1059	>	}});
1060
1061	<	t.start();
1062	<	Thread.sleep(SHORT_DELAY_MS);
1061	>	locked.await();
1062	>	assertHasWaiters(lock, c, t);
1063		t.interrupt();
1064	<	t.join(SHORT_DELAY_MS);
1065	<	assertFalse(t.isAlive());
1064	>	awaitTermination(t);
1065	>	assertNotWriteLocked(lock);
1066		}
1067
1068		/**
1069		* signalAll wakes up all threads
1070		*/
1071		public void testSignalAll() throws InterruptedException {
1072	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1072	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1073		final Condition c = lock.writeLock().newCondition();
1074	<	Thread t1 = new Thread(new Runnable() {
1075	<	public void run() {
1076	<	try {
1077	<	lock.writeLock().lock();
1078	<	c.await();
1079	<	lock.writeLock().unlock();
1080	<	}
1081	<	catch (InterruptedException e) {
1082	<	threadUnexpectedException();
1083	<	}
1084	<	}
1085	<	});
1086	<
1087	<	Thread t2 = new Thread(new Runnable() {
1088	<	public void run() {
1089	<	try {
1090	<	lock.writeLock().lock();
1091	<	c.await();
1092	<	lock.writeLock().unlock();
1093	<	}
1094	<	catch (InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1040	<
1041	<	t1.start();
1042	<	t2.start();
1043	<	Thread.sleep(SHORT_DELAY_MS);
1044	<	lock.writeLock().lock();
1074	>	final CountDownLatch locked = new CountDownLatch(2);
1075	>	final Lock writeLock = lock.writeLock();
1076	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1077	>	public void realRun() throws InterruptedException {
1078	>	writeLock.lock();
1079	>	locked.countDown();
1080	>	c.await();
1081	>	writeLock.unlock();
1082	>	}});
1083	>
1084	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1085	>	public void realRun() throws InterruptedException {
1086	>	writeLock.lock();
1087	>	locked.countDown();
1088	>	c.await();
1089	>	writeLock.unlock();
1090	>	}});
1091	>
1092	>	locked.await();
1093	>	writeLock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095		c.signalAll();
1096	<	lock.writeLock().unlock();
1097	<	t1.join(SHORT_DELAY_MS);
1098	<	t2.join(SHORT_DELAY_MS);
1099	<	assertFalse(t1.isAlive());
1100	<	assertFalse(t2.isAlive());
1096	>	assertHasNoWaiters(lock, c);
1097	>	writeLock.unlock();
1098	>	awaitTermination(t1);
1099	>	awaitTermination(t2);
1100	>	}
1101	>
1102	>	/**
1103	>	* signal wakes up waiting threads in FIFO order.
1104	>	*/
1105	>	public void testSignalWakesFifo() throws InterruptedException {
1106	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1107	>	final Condition c = lock.writeLock().newCondition();
1108	>	final CountDownLatch locked1 = new CountDownLatch(1);
1109	>	final CountDownLatch locked2 = new CountDownLatch(1);
1110	>	final Lock writeLock = lock.writeLock();
1111	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1112	>	public void realRun() throws InterruptedException {
1113	>	writeLock.lock();
1114	>	locked1.countDown();
1115	>	c.await();
1116	>	writeLock.unlock();
1117	>	}});
1118	>
1119	>	locked1.await();
1120	>
1121	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked2.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked2.await();
1130	>
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	assertFalse(lock.hasQueuedThreads());
1134	>	c.signal();
1135	>	assertHasWaiters(lock, c, t2);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	c.signal();
1139	>	assertHasNoWaiters(lock, c);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	writeLock.unlock();
1143	>	awaitTermination(t1);
1144	>	awaitTermination(t2);
1145		}
1146
1147		/**
#	Line 1074 | Line 1168 | public class ReentrantReadWriteLockTest
1168		* hasQueuedThreads reports whether there are waiting threads
1169		*/
1170		public void testhasQueuedThreads() throws InterruptedException {
1171	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1171	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1172		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1173		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1174		assertFalse(lock.hasQueuedThreads());
1175		lock.writeLock().lock();
1176	+	assertFalse(lock.hasQueuedThreads());
1177	+	long startTime = System.nanoTime();
1178		t1.start();
1179	<	Thread.sleep(SHORT_DELAY_MS);
1084	<	assertTrue(lock.hasQueuedThreads());
1179	>	waitForQueuedThread(lock, t1);
1180		t2.start();
1181	<	Thread.sleep(SHORT_DELAY_MS);
1181	>	waitForQueuedThread(lock, t2);
1182		assertTrue(lock.hasQueuedThreads());
1183		t1.interrupt();
1184	<	Thread.sleep(SHORT_DELAY_MS);
1184	>	awaitTermination(t1);
1185		assertTrue(lock.hasQueuedThreads());
1186		lock.writeLock().unlock();
1187	<	Thread.sleep(SHORT_DELAY_MS);
1187	>	awaitTermination(t2);
1188		assertFalse(lock.hasQueuedThreads());
1094	–	t1.join();
1095	–	t2.join();
1189		}
1190
1191		/**
1192		* hasQueuedThread(null) throws NPE
1193		*/
1194		public void testHasQueuedThreadNPE() {
1195	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1195	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1196		try {
1197		sync.hasQueuedThread(null);
1198		shouldThrow();
1199	<	} catch (NullPointerException success) {
1107	<	}
1199	>	} catch (NullPointerException success) {}
1200		}
1201
1202		/**
1203		* hasQueuedThread reports whether a thread is queued.
1204		*/
1205		public void testHasQueuedThread() throws InterruptedException {
1206	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1207	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1208	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1209	<	assertFalse(sync.hasQueuedThread(t1));
1210	<	assertFalse(sync.hasQueuedThread(t2));
1211	<	sync.writeLock().lock();
1206	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1207	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1208	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1209	>	assertFalse(lock.hasQueuedThread(t1));
1210	>	assertFalse(lock.hasQueuedThread(t2));
1211	>	lock.writeLock().lock();
1212	>	long startTime = System.nanoTime();
1213		t1.start();
1214	<	Thread.sleep(SHORT_DELAY_MS);
1215	<	assertTrue(sync.hasQueuedThread(t1));
1214	>	waitForQueuedThread(lock, t1);
1215	>	assertTrue(lock.hasQueuedThread(t1));
1216	>	assertFalse(lock.hasQueuedThread(t2));
1217		t2.start();
1218	<	Thread.sleep(SHORT_DELAY_MS);
1219	<	assertTrue(sync.hasQueuedThread(t1));
1220	<	assertTrue(sync.hasQueuedThread(t2));
1218	>	waitForQueuedThread(lock, t2);
1219	>	assertTrue(lock.hasQueuedThread(t1));
1220	>	assertTrue(lock.hasQueuedThread(t2));
1221		t1.interrupt();
1222	<	Thread.sleep(SHORT_DELAY_MS);
1223	<	assertFalse(sync.hasQueuedThread(t1));
1224	<	assertTrue(sync.hasQueuedThread(t2));
1225	<	sync.writeLock().unlock();
1226	<	Thread.sleep(SHORT_DELAY_MS);
1227	<	assertFalse(sync.hasQueuedThread(t1));
1228	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	assertFalse(sync.hasQueuedThread(t2));
1136	<	t1.join();
1137	<	t2.join();
1222	>	awaitTermination(t1);
1223	>	assertFalse(lock.hasQueuedThread(t1));
1224	>	assertTrue(lock.hasQueuedThread(t2));
1225	>	lock.writeLock().unlock();
1226	>	awaitTermination(t2);
1227	>	assertFalse(lock.hasQueuedThread(t1));
1228	>	assertFalse(lock.hasQueuedThread(t2));
1229		}
1230
1140	–
1231		/**
1232		* getQueueLength reports number of waiting threads
1233		*/
1234		public void testGetQueueLength() throws InterruptedException {
1235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1235	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1236		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1237		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1238		assertEquals(0, lock.getQueueLength());
1239		lock.writeLock().lock();
1240	+	long startTime = System.nanoTime();
1241		t1.start();
1242	<	Thread.sleep(SHORT_DELAY_MS);
1242	>	waitForQueuedThread(lock, t1);
1243		assertEquals(1, lock.getQueueLength());
1244		t2.start();
1245	<	Thread.sleep(SHORT_DELAY_MS);
1245	>	waitForQueuedThread(lock, t2);
1246		assertEquals(2, lock.getQueueLength());
1247		t1.interrupt();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1248	>	awaitTermination(t1);
1249		assertEquals(1, lock.getQueueLength());
1250		lock.writeLock().unlock();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1251	>	awaitTermination(t2);
1252		assertEquals(0, lock.getQueueLength());
1162	–	t1.join();
1163	–	t2.join();
1253		}
1254
1255		/**
1256		* getQueuedThreads includes waiting threads
1257		*/
1258		public void testGetQueuedThreads() throws InterruptedException {
1259	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1259	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1260		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262		assertTrue(lock.getQueuedThreads().isEmpty());
1263		lock.writeLock().lock();
1264	+	long startTime = System.nanoTime();
1265		assertTrue(lock.getQueuedThreads().isEmpty());
1266		t1.start();
1267	<	Thread.sleep(SHORT_DELAY_MS);
1267	>	waitForQueuedThread(lock, t1);
1268	>	assertEquals(1, lock.getQueuedThreads().size());
1269		assertTrue(lock.getQueuedThreads().contains(t1));
1270		t2.start();
1271	<	Thread.sleep(SHORT_DELAY_MS);
1271	>	waitForQueuedThread(lock, t2);
1272	>	assertEquals(2, lock.getQueuedThreads().size());
1273		assertTrue(lock.getQueuedThreads().contains(t1));
1274		assertTrue(lock.getQueuedThreads().contains(t2));
1275		t1.interrupt();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1276	>	awaitTermination(t1);
1277		assertFalse(lock.getQueuedThreads().contains(t1));
1278		assertTrue(lock.getQueuedThreads().contains(t2));
1279	+	assertEquals(1, lock.getQueuedThreads().size());
1280		lock.writeLock().unlock();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1281	>	awaitTermination(t2);
1282		assertTrue(lock.getQueuedThreads().isEmpty());
1190	–	t1.join();
1191	–	t2.join();
1283		}
1284
1285		/**
1286		* hasWaiters throws NPE if null
1287		*/
1288		public void testHasWaitersNPE() {
1289	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1289	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1290		try {
1291		lock.hasWaiters(null);
1292		shouldThrow();
#	Line 1206 | Line 1297 | public class ReentrantReadWriteLockTest
1297		* getWaitQueueLength throws NPE if null
1298		*/
1299		public void testGetWaitQueueLengthNPE() {
1300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1301		try {
1302		lock.getWaitQueueLength(null);
1303		shouldThrow();
1304		} catch (NullPointerException success) {}
1305		}
1306
1216	–
1307		/**
1308		* getWaitingThreads throws NPE if null
1309		*/
1310		public void testGetWaitingThreadsNPE() {
1311	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1311	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1312		try {
1313		lock.getWaitingThreads(null);
1314		shouldThrow();
#	Line 1229 | Line 1319 | public class ReentrantReadWriteLockTest
1319		* hasWaiters throws IAE if not owned
1320		*/
1321		public void testHasWaitersIAE() {
1322	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1322	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1323		final Condition c = lock.writeLock().newCondition();
1324	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1324	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1325		try {
1326		lock2.hasWaiters(c);
1327		shouldThrow();
#	Line 1242 | Line 1332 | public class ReentrantReadWriteLockTest
1332		* hasWaiters throws IMSE if not locked
1333		*/
1334		public void testHasWaitersIMSE() {
1335	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1335	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1336		final Condition c = lock.writeLock().newCondition();
1337		try {
1338		lock.hasWaiters(c);
#	Line 1250 | Line 1340 | public class ReentrantReadWriteLockTest
1340		} catch (IllegalMonitorStateException success) {}
1341		}
1342
1253	–
1343		/**
1344		* getWaitQueueLength throws IAE if not owned
1345		*/
1346		public void testGetWaitQueueLengthIAE() {
1347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1347	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348		final Condition c = lock.writeLock().newCondition();
1349	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1349	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1350		try {
1351		lock2.getWaitQueueLength(c);
1352		shouldThrow();
#	Line 1268 | Line 1357 | public class ReentrantReadWriteLockTest
1357		* getWaitQueueLength throws IMSE if not locked
1358		*/
1359		public void testGetWaitQueueLengthIMSE() {
1360	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1360	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1361		final Condition c = lock.writeLock().newCondition();
1362		try {
1363		lock.getWaitQueueLength(c);
#	Line 1276 | Line 1365 | public class ReentrantReadWriteLockTest
1365		} catch (IllegalMonitorStateException success) {}
1366		}
1367
1279	–
1368		/**
1369		* getWaitingThreads throws IAE if not owned
1370		*/
1371		public void testGetWaitingThreadsIAE() {
1372	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1372	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1373		final Condition c = lock.writeLock().newCondition();
1374	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1374	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1375		try {
1376		lock2.getWaitingThreads(c);
1377		shouldThrow();
#	Line 1294 | Line 1382 | public class ReentrantReadWriteLockTest
1382		* getWaitingThreads throws IMSE if not locked
1383		*/
1384		public void testGetWaitingThreadsIMSE() {
1385	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1385	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1386		final Condition c = lock.writeLock().newCondition();
1387		try {
1388		lock.getWaitingThreads(c);
#	Line 1302 | Line 1390 | public class ReentrantReadWriteLockTest
1390		} catch (IllegalMonitorStateException success) {}
1391		}
1392
1305	–
1393		/**
1394		* hasWaiters returns true when a thread is waiting, else false
1395		*/
1396		public void testHasWaiters() throws InterruptedException {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1398		final Condition c = lock.writeLock().newCondition();
1399	<	Thread t = new Thread(new Runnable() {
1400	<	public void run() {
1401	<	try {
1402	<	lock.writeLock().lock();
1403	<	threadAssertFalse(lock.hasWaiters(c));
1404	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1405	<	c.await();
1406	<	lock.writeLock().unlock();
1407	<	}
1408	<	catch (InterruptedException e) {
1322	<	threadUnexpectedException();
1323	<	}
1324	<	}
1325	<	});
1399	>	final CountDownLatch locked = new CountDownLatch(1);
1400	>	Thread t = newStartedThread(new CheckedRunnable() {
1401	>	public void realRun() throws InterruptedException {
1402	>	lock.writeLock().lock();
1403	>	assertFalse(lock.hasWaiters(c));
1404	>	locked.countDown();
1405	>	assertEquals(0, lock.getWaitQueueLength(c));
1406	>	c.await();
1407	>	lock.writeLock().unlock();
1408	>	}});
1409
1410	<	t.start();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1410	>	locked.await();
1411		lock.writeLock().lock();
1412		assertTrue(lock.hasWaiters(c));
1413		assertEquals(1, lock.getWaitQueueLength(c));
1414		c.signal();
1415	+	assertHasNoWaiters(lock, c);
1416		lock.writeLock().unlock();
1417	<	Thread.sleep(SHORT_DELAY_MS);
1418	<	lock.writeLock().lock();
1336	<	assertFalse(lock.hasWaiters(c));
1337	<	assertEquals(0, lock.getWaitQueueLength(c));
1338	<	lock.writeLock().unlock();
1339	<	t.join(SHORT_DELAY_MS);
1340	<	assertFalse(t.isAlive());
1417	>	awaitTermination(t);
1418	>	assertHasNoWaiters(lock, c);
1419		}
1420
1421		/**
1422		* getWaitQueueLength returns number of waiting threads
1423		*/
1424		public void testGetWaitQueueLength() throws InterruptedException {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1425	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1426		final Condition c = lock.writeLock().newCondition();
1427	<	Thread t = new Thread(new Runnable() {
1428	<	public void run() {
1429	<	try {
1430	<	lock.writeLock().lock();
1431	<	threadAssertFalse(lock.hasWaiters(c));
1432	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1433	<	c.await();
1434	<	lock.writeLock().unlock();
1435	<	}
1358	<	catch (InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1427	>	final CountDownLatch locked = new CountDownLatch(1);
1428	>	Thread t = newStartedThread(new CheckedRunnable() {
1429	>	public void realRun() throws InterruptedException {
1430	>	lock.writeLock().lock();
1431	>	assertEquals(0, lock.getWaitQueueLength(c));
1432	>	locked.countDown();
1433	>	c.await();
1434	>	lock.writeLock().unlock();
1435	>	}});
1436
1437	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1437	>	locked.await();
1438		lock.writeLock().lock();
1439	<	assertTrue(lock.hasWaiters(c));
1439	>	assertHasWaiters(lock, c, t);
1440		assertEquals(1, lock.getWaitQueueLength(c));
1441		c.signal();
1442	<	lock.writeLock().unlock();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	lock.writeLock().lock();
1373	<	assertFalse(lock.hasWaiters(c));
1442	>	assertHasNoWaiters(lock, c);
1443		assertEquals(0, lock.getWaitQueueLength(c));
1444		lock.writeLock().unlock();
1445	<	t.join(SHORT_DELAY_MS);
1377	<	assertFalse(t.isAlive());
1445	>	awaitTermination(t);
1446		}
1447
1380	–
1448		/**
1449		* getWaitingThreads returns only and all waiting threads
1450		*/
1451		public void testGetWaitingThreads() throws InterruptedException {
1452	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1452	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1453		final Condition c = lock.writeLock().newCondition();
1454	<	Thread t1 = new Thread(new Runnable() {
1455	<	public void run() {
1456	<	try {
1457	<	lock.writeLock().lock();
1458	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1459	<	c.await();
1460	<	lock.writeLock().unlock();
1461	<	}
1462	<	catch (InterruptedException e) {
1463	<	threadUnexpectedException();
1464	<	}
1465	<	}
1466	<	});
1467	<
1468	<	Thread t2 = new Thread(new Runnable() {
1469	<	public void run() {
1470	<	try {
1471	<	lock.writeLock().lock();
1472	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	<	c.await();
1407	<	lock.writeLock().unlock();
1408	<	}
1409	<	catch (InterruptedException e) {
1410	<	threadUnexpectedException();
1411	<	}
1412	<	}
1413	<	});
1454	>	final CountDownLatch locked1 = new CountDownLatch(1);
1455	>	final CountDownLatch locked2 = new CountDownLatch(1);
1456	>	Thread t1 = new Thread(new CheckedRunnable() {
1457	>	public void realRun() throws InterruptedException {
1458	>	lock.writeLock().lock();
1459	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1460	>	locked1.countDown();
1461	>	c.await();
1462	>	lock.writeLock().unlock();
1463	>	}});
1464	>
1465	>	Thread t2 = new Thread(new CheckedRunnable() {
1466	>	public void realRun() throws InterruptedException {
1467	>	lock.writeLock().lock();
1468	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1469	>	locked2.countDown();
1470	>	c.await();
1471	>	lock.writeLock().unlock();
1472	>	}});
1473
1474		lock.writeLock().lock();
1475		assertTrue(lock.getWaitingThreads(c).isEmpty());
1476		lock.writeLock().unlock();
1477	+
1478		t1.start();
1479	<	Thread.sleep(SHORT_DELAY_MS);
1479	>	locked1.await();
1480		t2.start();
1481	<	Thread.sleep(SHORT_DELAY_MS);
1481	>	locked2.await();
1482	>
1483		lock.writeLock().lock();
1484		assertTrue(lock.hasWaiters(c));
1485		assertTrue(lock.getWaitingThreads(c).contains(t1));
1486		assertTrue(lock.getWaitingThreads(c).contains(t2));
1487	+	assertEquals(2, lock.getWaitingThreads(c).size());
1488		c.signalAll();
1489	+	assertHasNoWaiters(lock, c);
1490		lock.writeLock().unlock();
1491	<	Thread.sleep(SHORT_DELAY_MS);
1492	<	lock.writeLock().lock();
1493	<	assertFalse(lock.hasWaiters(c));
1494	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1495	<	lock.writeLock().unlock();
1433	<	t1.join(SHORT_DELAY_MS);
1434	<	t2.join(SHORT_DELAY_MS);
1435	<	assertFalse(t1.isAlive());
1436	<	assertFalse(t2.isAlive());
1491	>
1492	>	awaitTermination(t1);
1493	>	awaitTermination(t2);
1494	>
1495	>	assertHasNoWaiters(lock, c);
1496		}
1497
1498		/**

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