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root/jsr166/jsr166/src/test/tck/ReentrantReadWriteLockTest.java

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.32 by jsr166, Tue Nov 17 14:18:28 2009 UTC vs.
Revision 1.59 by jsr166, Sat May 7 19:03:26 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(2 * 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(2 * 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));
779	<	} catch (Exception ex) {
780	<	threadUnexpectedException();
781	<	}
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	>	long startTime = System.nanoTime();
778	>	long timeoutMillis = 10;
779	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
780	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
781	>	}});
782
783	<	t.start();
784	<	t.join();
783	>	awaitTermination(t);
784	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
785		lock.writeLock().unlock();
786		}
787
#	Line 718 | Line 789 | public class ReentrantReadWriteLockTest
789		* read timed tryLock times out if write-locked
790		*/
791		public void testReadTryLock_Timeout() throws InterruptedException {
792	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
793	<	lock.writeLock().lock();
794	<	Thread t = new Thread(new Runnable() {
795	<	public void run() {
796	<	try {
797	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
798	<	} catch (Exception ex) {
799	<	threadUnexpectedException();
800	<	}
730	<	}
731	<	});
792	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
793	>	lock.writeLock().lock();
794	>	Thread t = newStartedThread(new CheckedRunnable() {
795	>	public void realRun() throws InterruptedException {
796	>	long startTime = System.nanoTime();
797	>	long timeoutMillis = 10;
798	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
799	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
800	>	}});
801
802	<	t.start();
803	<	t.join();
802	>	awaitTermination(t);
803	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
804		lock.writeLock().unlock();
805		}
806
738	–
807		/**
808		* write lockInterruptibly succeeds if lock free else is interruptible
809		*/
810		public void testWriteLockInterruptibly() throws InterruptedException {
811	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
811	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
812		lock.writeLock().lockInterruptibly();
813	<	Thread t = new Thread(new Runnable() {
814	<	public void run() {
815	<	try {
816	<	lock.writeLock().lockInterruptibly();
749	<	threadShouldThrow();
750	<	}
751	<	catch (InterruptedException success) {
752	<	}
753	<	}
754	<	});
813	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
814	>	public void realRun() throws InterruptedException {
815	>	lock.writeLock().lockInterruptibly();
816	>	}});
817
818	<	t.start();
757	<	Thread.sleep(SHORT_DELAY_MS);
818	>	waitForQueuedThread(lock, t);
819		t.interrupt();
820	<	Thread.sleep(SHORT_DELAY_MS);
821	<	t.join();
761	<	lock.writeLock().unlock();
820	>	awaitTermination(t);
821	>	releaseWriteLock(lock);
822		}
823
824		/**
825	<	*  read lockInterruptibly succeeds if lock free else is interruptible
825	>	* read lockInterruptibly succeeds if lock free else is interruptible
826		*/
827		public void testReadLockInterruptibly() throws InterruptedException {
828	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
828	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
829		lock.writeLock().lockInterruptibly();
830	<	Thread t = new Thread(new Runnable() {
831	<	public void run() {
832	<	try {
833	<	lock.readLock().lockInterruptibly();
774	<	threadShouldThrow();
775	<	}
776	<	catch (InterruptedException success) {
777	<	}
778	<	}
779	<	});
830	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
831	>	public void realRun() throws InterruptedException {
832	>	lock.readLock().lockInterruptibly();
833	>	}});
834
835	<	t.start();
782	<	Thread.sleep(SHORT_DELAY_MS);
835	>	waitForQueuedThread(lock, t);
836		t.interrupt();
837	<	t.join();
838	<	lock.writeLock().unlock();
837	>	awaitTermination(t);
838	>	releaseWriteLock(lock);
839		}
840
841		/**
842		* Calling await without holding lock throws IllegalMonitorStateException
843		*/
844		public void testAwait_IllegalMonitor() throws InterruptedException {
845	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846		final Condition c = lock.writeLock().newCondition();
847		try {
848		c.await();
849		shouldThrow();
850		} catch (IllegalMonitorStateException success) {}
851	+	try {
852	+	c.await(LONG_DELAY_MS, MILLISECONDS);
853	+	shouldThrow();
854	+	} catch (IllegalMonitorStateException success) {}
855	+	try {
856	+	c.awaitNanos(100);
857	+	shouldThrow();
858	+	} catch (IllegalMonitorStateException success) {}
859	+	try {
860	+	c.awaitUninterruptibly();
861	+	shouldThrow();
862	+	} catch (IllegalMonitorStateException success) {}
863		}
864
865		/**
866		* Calling signal without holding lock throws IllegalMonitorStateException
867		*/
868		public void testSignal_IllegalMonitor() {
869	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870		final Condition c = lock.writeLock().newCondition();
871		try {
872		c.signal();
#	Line 810 | Line 875 | public class ReentrantReadWriteLockTest
875		}
876
877		/**
878	+	* Calling signalAll without holding lock throws IllegalMonitorStateException
879	+	*/
880	+	public void testSignalAll_IllegalMonitor() {
881	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
882	+	final Condition c = lock.writeLock().newCondition();
883	+	try {
884	+	c.signalAll();
885	+	shouldThrow();
886	+	} catch (IllegalMonitorStateException success) {}
887	+	}
888	+
889	+	/**
890		* awaitNanos without a signal times out
891		*/
892		public void testAwaitNanos_Timeout() throws InterruptedException {
893	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
893	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894		final Condition c = lock.writeLock().newCondition();
818	–
895		lock.writeLock().lock();
896	<	long t = c.awaitNanos(100);
897	<	assertTrue(t <= 0);
896	>	long startTime = System.nanoTime();
897	>	long timeoutMillis = 10;
898	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
899	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
900	>	assertTrue(nanosRemaining <= 0);
901	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
902		lock.writeLock().unlock();
903		}
904
825	–
905		/**
906	<	*  timed await without a signal times out
906	>	* timed await without a signal times out
907		*/
908	<	public void testAwait_Timeout() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	public void testAwait_Timeout() throws InterruptedException {
909	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
910		final Condition c = lock.writeLock().newCondition();
911		lock.writeLock().lock();
912	+	long startTime = System.nanoTime();
913	+	long timeoutMillis = 10;
914	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
915	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
916		lock.writeLock().unlock();
917		}
918
919		/**
920		* awaitUntil without a signal times out
921		*/
922	<	public void testAwaitUntil_Timeout() {
923	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
922	>	public void testAwaitUntil_Timeout() throws InterruptedException {
923	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
924		final Condition c = lock.writeLock().newCondition();
925		lock.writeLock().lock();
926	+	long startTime = System.nanoTime();
927	+	long timeoutMillis = 10;
928		java.util.Date d = new java.util.Date();
929	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
930	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
931		lock.writeLock().unlock();
932		}
933
#	Line 848 | Line 935 | public class ReentrantReadWriteLockTest
935		* await returns when signalled
936		*/
937		public void testAwait() throws InterruptedException {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
939		final Condition c = lock.writeLock().newCondition();
940	<	Thread t = new Thread(new Runnable() {
941	<	public void run() {
942	<	try {
943	<	lock.writeLock().lock();
944	<	c.await();
945	<	lock.writeLock().unlock();
946	<	}
947	<	catch (InterruptedException e) {
861	<	threadUnexpectedException();
862	<	}
863	<	}
864	<	});
940	>	final CountDownLatch locked = new CountDownLatch(1);
941	>	Thread t = newStartedThread(new CheckedRunnable() {
942	>	public void realRun() throws InterruptedException {
943	>	lock.writeLock().lock();
944	>	locked.countDown();
945	>	c.await();
946	>	lock.writeLock().unlock();
947	>	}});
948
949	<	t.start();
867	<	Thread.sleep(SHORT_DELAY_MS);
949	>	locked.await();
950		lock.writeLock().lock();
951	+	assertHasWaiters(lock, c, t);
952		c.signal();
953	+	assertHasNoWaiters(lock, c);
954	+	assertTrue(t.isAlive());
955		lock.writeLock().unlock();
956	<	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	<	}
956	>	awaitTermination(t);
957		}
958
959		/**
#	Line 905 | Line 962 | public class ReentrantReadWriteLockTest
962		public void testAwaitUninterruptibly() throws InterruptedException {
963		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
964		final Condition c = lock.writeLock().newCondition();
965	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
966	<
967	<	thread.start();
968	<
969	<	while (!thread.lockStarted) {
970	<	Thread.sleep(100);
971	<	}
965	>	final CountDownLatch locked = new CountDownLatch(1);
966	>	Thread t = newStartedThread(new CheckedRunnable() {
967	>	public void realRun() {
968	>	lock.writeLock().lock();
969	>	locked.countDown();
970	>	c.awaitUninterruptibly();
971	>	assertTrue(Thread.interrupted());
972	>	lock.writeLock().unlock();
973	>	}});
974
975	+	locked.await();
976		lock.writeLock().lock();
977	<	try {
978	<	thread.interrupt();
979	<	thread.canAwake = true;
980	<	c.signal();
981	<	} finally {
982	<	lock.writeLock().unlock();
983	<	}
984	<
925	<	thread.join();
926	<	assertTrue(thread.interrupted);
927	<	assertFalse(thread.isAlive());
977	>	lock.writeLock().unlock();
978	>	t.interrupt();
979	>	long timeoutMillis = 10;
980	>	assertThreadJoinTimesOut(t, timeoutMillis);
981	>	lock.writeLock().lock();
982	>	c.signal();
983	>	lock.writeLock().unlock();
984	>	awaitTermination(t);
985		}
986
987		/**
988		* await is interruptible
989		*/
990		public void testAwait_Interrupt() throws InterruptedException {
991	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
991	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
992		final Condition c = lock.writeLock().newCondition();
993	<	Thread t = new Thread(new Runnable() {
994	<	public void run() {
995	<	try {
996	<	lock.writeLock().lock();
997	<	c.await();
998	<	lock.writeLock().unlock();
999	<	threadShouldThrow();
1000	<	}
1001	<	catch (InterruptedException success) {
1002	<	}
1003	<	}
1004	<	});
993	>	final CountDownLatch locked = new CountDownLatch(1);
994	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
995	>	public void realRun() throws InterruptedException {
996	>	lock.writeLock().lock();
997	>	assertWriteLockedBy(lock, Thread.currentThread());
998	>	assertHasNoWaiters(lock, c);
999	>	locked.countDown();
1000	>	try {
1001	>	c.await();
1002	>	} finally {
1003	>	assertWriteLockedBy(lock, Thread.currentThread());
1004	>	assertHasNoWaiters(lock, c);
1005	>	lock.writeLock().unlock();
1006	>	assertFalse(Thread.interrupted());
1007	>	}
1008	>	}});
1009
1010	<	t.start();
1011	<	Thread.sleep(SHORT_DELAY_MS);
1010	>	locked.await();
1011	>	assertHasWaiters(lock, c, t);
1012		t.interrupt();
1013	<	t.join(SHORT_DELAY_MS);
1014	<	assertFalse(t.isAlive());
1013	>	awaitTermination(t);
1014	>	assertNotWriteLocked(lock);
1015		}
1016
1017		/**
1018		* awaitNanos is interruptible
1019		*/
1020		public void testAwaitNanos_Interrupt() throws InterruptedException {
1021	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1021	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1022		final Condition c = lock.writeLock().newCondition();
1023	<	Thread t = new Thread(new Runnable() {
1024	<	public void run() {
1025	<	try {
1026	<	lock.writeLock().lock();
1027	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1028	<	lock.writeLock().unlock();
1029	<	threadShouldThrow();
1030	<	}
1031	<	catch (InterruptedException success) {
1032	<	}
1033	<	}
1034	<	});
1023	>	final CountDownLatch locked = new CountDownLatch(1);
1024	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1025	>	public void realRun() throws InterruptedException {
1026	>	lock.writeLock().lock();
1027	>	assertWriteLockedBy(lock, Thread.currentThread());
1028	>	assertHasNoWaiters(lock, c);
1029	>	locked.countDown();
1030	>	try {
1031	>	c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
1032	>	} finally {
1033	>	assertWriteLockedBy(lock, Thread.currentThread());
1034	>	assertHasNoWaiters(lock, c);
1035	>	lock.writeLock().unlock();
1036	>	assertFalse(Thread.interrupted());
1037	>	}
1038	>	}});
1039
1040	<	t.start();
1041	<	Thread.sleep(SHORT_DELAY_MS);
1040	>	locked.await();
1041	>	assertHasWaiters(lock, c, t);
1042		t.interrupt();
1043	<	t.join(SHORT_DELAY_MS);
1044	<	assertFalse(t.isAlive());
1043	>	awaitTermination(t);
1044	>	assertNotWriteLocked(lock);
1045		}
1046
1047		/**
1048		* awaitUntil is interruptible
1049		*/
1050		public void testAwaitUntil_Interrupt() throws InterruptedException {
1051	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1051	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1052		final Condition c = lock.writeLock().newCondition();
1053	<	Thread t = new Thread(new Runnable() {
1054	<	public void run() {
1055	<	try {
1056	<	lock.writeLock().lock();
1057	<	java.util.Date d = new java.util.Date();
1058	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1059	<	lock.writeLock().unlock();
1060	<	threadShouldThrow();
1061	<	}
1062	<	catch (InterruptedException success) {
1063	<	}
1064	<	}
1065	<	});
1053	>	final CountDownLatch locked = new CountDownLatch(1);
1054	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1055	>	public void realRun() throws InterruptedException {
1056	>	lock.writeLock().lock();
1057	>	assertWriteLockedBy(lock, Thread.currentThread());
1058	>	assertHasNoWaiters(lock, c);
1059	>	locked.countDown();
1060	>	java.util.Date d = new java.util.Date();
1061	>	try {
1062	>	c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS));
1063	>	} finally {
1064	>	assertWriteLockedBy(lock, Thread.currentThread());
1065	>	assertHasNoWaiters(lock, c);
1066	>	lock.writeLock().unlock();
1067	>	assertFalse(Thread.interrupted());
1068	>	}
1069	>	}});
1070
1071	<	t.start();
1072	<	Thread.sleep(SHORT_DELAY_MS);
1071	>	locked.await();
1072	>	assertHasWaiters(lock, c, t);
1073		t.interrupt();
1074	<	t.join(SHORT_DELAY_MS);
1075	<	assertFalse(t.isAlive());
1074	>	awaitTermination(t);
1075	>	assertNotWriteLocked(lock);
1076		}
1077
1078		/**
1079		* signalAll wakes up all threads
1080		*/
1081		public void testSignalAll() throws InterruptedException {
1082	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1082	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1083	>	final Condition c = lock.writeLock().newCondition();
1084	>	final CountDownLatch locked = new CountDownLatch(2);
1085	>	final Lock writeLock = lock.writeLock();
1086	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1087	>	public void realRun() throws InterruptedException {
1088	>	writeLock.lock();
1089	>	locked.countDown();
1090	>	c.await();
1091	>	writeLock.unlock();
1092	>	}});
1093	>
1094	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1095	>	public void realRun() throws InterruptedException {
1096	>	writeLock.lock();
1097	>	locked.countDown();
1098	>	c.await();
1099	>	writeLock.unlock();
1100	>	}});
1101	>
1102	>	locked.await();
1103	>	writeLock.lock();
1104	>	assertHasWaiters(lock, c, t1, t2);
1105	>	c.signalAll();
1106	>	assertHasNoWaiters(lock, c);
1107	>	writeLock.unlock();
1108	>	awaitTermination(t1);
1109	>	awaitTermination(t2);
1110	>	}
1111	>
1112	>	/**
1113	>	* signal wakes up waiting threads in FIFO order.
1114	>	*/
1115	>	public void testSignalWakesFifo() throws InterruptedException {
1116	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1117		final Condition c = lock.writeLock().newCondition();
1118	<	Thread t1 = new Thread(new Runnable() {
1119	<	public void run() {
1120	<	try {
1121	<	lock.writeLock().lock();
1122	<	c.await();
1123	<	lock.writeLock().unlock();
1124	<	}
1125	<	catch (InterruptedException e) {
1126	<	threadUnexpectedException();
1127	<	}
1128	<	}
1129	<	});
1130	<
1131	<	Thread t2 = new Thread(new Runnable() {
1132	<	public void run() {
1133	<	try {
1134	<	lock.writeLock().lock();
1135	<	c.await();
1136	<	lock.writeLock().unlock();
1137	<	}
1035	<	catch (InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1118	>	final CountDownLatch locked1 = new CountDownLatch(1);
1119	>	final CountDownLatch locked2 = new CountDownLatch(1);
1120	>	final Lock writeLock = lock.writeLock();
1121	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked1.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked1.await();
1130	>
1131	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1132	>	public void realRun() throws InterruptedException {
1133	>	writeLock.lock();
1134	>	locked2.countDown();
1135	>	c.await();
1136	>	writeLock.unlock();
1137	>	}});
1138
1139	<	t1.start();
1140	<	t2.start();
1141	<	Thread.sleep(SHORT_DELAY_MS);
1139	>	locked2.await();
1140	>
1141	>	writeLock.lock();
1142	>	assertHasWaiters(lock, c, t1, t2);
1143	>	assertFalse(lock.hasQueuedThreads());
1144	>	c.signal();
1145	>	assertHasWaiters(lock, c, t2);
1146	>	assertTrue(lock.hasQueuedThread(t1));
1147	>	assertFalse(lock.hasQueuedThread(t2));
1148	>	c.signal();
1149	>	assertHasNoWaiters(lock, c);
1150	>	assertTrue(lock.hasQueuedThread(t1));
1151	>	assertTrue(lock.hasQueuedThread(t2));
1152	>	writeLock.unlock();
1153	>	awaitTermination(t1);
1154	>	awaitTermination(t2);
1155	>	}
1156	>
1157	>	/**
1158	>	* await after multiple reentrant locking preserves lock count
1159	>	*/
1160	>	public void testAwaitLockCount() throws InterruptedException {
1161	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1162	>	final Condition c = lock.writeLock().newCondition();
1163	>	final CountDownLatch locked = new CountDownLatch(2);
1164	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1165	>	public void realRun() throws InterruptedException {
1166	>	lock.writeLock().lock();
1167	>	assertWriteLockedBy(lock, Thread.currentThread());
1168	>	assertEquals(1, lock.writeLock().getHoldCount());
1169	>	locked.countDown();
1170	>	c.await();
1171	>	assertWriteLockedBy(lock, Thread.currentThread());
1172	>	assertEquals(1, lock.writeLock().getHoldCount());
1173	>	lock.writeLock().unlock();
1174	>	}});
1175	>
1176	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1177	>	public void realRun() throws InterruptedException {
1178	>	lock.writeLock().lock();
1179	>	lock.writeLock().lock();
1180	>	assertWriteLockedBy(lock, Thread.currentThread());
1181	>	assertEquals(2, lock.writeLock().getHoldCount());
1182	>	locked.countDown();
1183	>	c.await();
1184	>	assertWriteLockedBy(lock, Thread.currentThread());
1185	>	assertEquals(2, lock.writeLock().getHoldCount());
1186	>	lock.writeLock().unlock();
1187	>	lock.writeLock().unlock();
1188	>	}});
1189	>
1190	>	locked.await();
1191		lock.writeLock().lock();
1192	+	assertHasWaiters(lock, c, t1, t2);
1193		c.signalAll();
1194	+	assertHasNoWaiters(lock, c);
1195		lock.writeLock().unlock();
1196	<	t1.join(SHORT_DELAY_MS);
1197	<	t2.join(SHORT_DELAY_MS);
1049	<	assertFalse(t1.isAlive());
1050	<	assertFalse(t2.isAlive());
1196	>	awaitTermination(t1);
1197	>	awaitTermination(t2);
1198		}
1199
1200		/**
#	Line 1073 | Line 1220 | public class ReentrantReadWriteLockTest
1220		/**
1221		* hasQueuedThreads reports whether there are waiting threads
1222		*/
1223	<	public void testhasQueuedThreads() throws InterruptedException {
1224	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223	>	public void testHasQueuedThreads() throws InterruptedException {
1224	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1225		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1226		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1227		assertFalse(lock.hasQueuedThreads());
1228		lock.writeLock().lock();
1229	+	assertFalse(lock.hasQueuedThreads());
1230		t1.start();
1231	<	Thread.sleep(SHORT_DELAY_MS);
1231	>	waitForQueuedThread(lock, t1);
1232		assertTrue(lock.hasQueuedThreads());
1233		t2.start();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1234	>	waitForQueuedThread(lock, t2);
1235		assertTrue(lock.hasQueuedThreads());
1236		t1.interrupt();
1237	<	Thread.sleep(SHORT_DELAY_MS);
1237	>	awaitTermination(t1);
1238		assertTrue(lock.hasQueuedThreads());
1239		lock.writeLock().unlock();
1240	<	Thread.sleep(SHORT_DELAY_MS);
1240	>	awaitTermination(t2);
1241		assertFalse(lock.hasQueuedThreads());
1094	–	t1.join();
1095	–	t2.join();
1242		}
1243
1244		/**
1245		* hasQueuedThread(null) throws NPE
1246		*/
1247		public void testHasQueuedThreadNPE() {
1248	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1248	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1249		try {
1250	<	sync.hasQueuedThread(null);
1250	>	lock.hasQueuedThread(null);
1251		shouldThrow();
1252	<	} catch (NullPointerException success) {
1107	<	}
1252	>	} catch (NullPointerException success) {}
1253		}
1254
1255		/**
1256		* hasQueuedThread reports whether a thread is queued.
1257		*/
1258		public void testHasQueuedThread() throws InterruptedException {
1259	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1260	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1261	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1262	<	assertFalse(sync.hasQueuedThread(t1));
1263	<	assertFalse(sync.hasQueuedThread(t2));
1264	<	sync.writeLock().lock();
1259	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1260	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262	>	assertFalse(lock.hasQueuedThread(t1));
1263	>	assertFalse(lock.hasQueuedThread(t2));
1264	>	lock.writeLock().lock();
1265		t1.start();
1266	<	Thread.sleep(SHORT_DELAY_MS);
1267	<	assertTrue(sync.hasQueuedThread(t1));
1266	>	waitForQueuedThread(lock, t1);
1267	>	assertTrue(lock.hasQueuedThread(t1));
1268	>	assertFalse(lock.hasQueuedThread(t2));
1269		t2.start();
1270	<	Thread.sleep(SHORT_DELAY_MS);
1271	<	assertTrue(sync.hasQueuedThread(t1));
1272	<	assertTrue(sync.hasQueuedThread(t2));
1270	>	waitForQueuedThread(lock, t2);
1271	>	assertTrue(lock.hasQueuedThread(t1));
1272	>	assertTrue(lock.hasQueuedThread(t2));
1273		t1.interrupt();
1274	<	Thread.sleep(SHORT_DELAY_MS);
1275	<	assertFalse(sync.hasQueuedThread(t1));
1276	<	assertTrue(sync.hasQueuedThread(t2));
1277	<	sync.writeLock().unlock();
1278	<	Thread.sleep(SHORT_DELAY_MS);
1279	<	assertFalse(sync.hasQueuedThread(t1));
1280	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	assertFalse(sync.hasQueuedThread(t2));
1136	<	t1.join();
1137	<	t2.join();
1274	>	awaitTermination(t1);
1275	>	assertFalse(lock.hasQueuedThread(t1));
1276	>	assertTrue(lock.hasQueuedThread(t2));
1277	>	lock.writeLock().unlock();
1278	>	awaitTermination(t2);
1279	>	assertFalse(lock.hasQueuedThread(t1));
1280	>	assertFalse(lock.hasQueuedThread(t2));
1281		}
1282
1140	–
1283		/**
1284		* getQueueLength reports number of waiting threads
1285		*/
1286		public void testGetQueueLength() throws InterruptedException {
1287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1287	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1288		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1289		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1290		assertEquals(0, lock.getQueueLength());
1291		lock.writeLock().lock();
1292		t1.start();
1293	<	Thread.sleep(SHORT_DELAY_MS);
1293	>	waitForQueuedThread(lock, t1);
1294		assertEquals(1, lock.getQueueLength());
1295		t2.start();
1296	<	Thread.sleep(SHORT_DELAY_MS);
1296	>	waitForQueuedThread(lock, t2);
1297		assertEquals(2, lock.getQueueLength());
1298		t1.interrupt();
1299	<	Thread.sleep(SHORT_DELAY_MS);
1299	>	awaitTermination(t1);
1300		assertEquals(1, lock.getQueueLength());
1301		lock.writeLock().unlock();
1302	<	Thread.sleep(SHORT_DELAY_MS);
1302	>	awaitTermination(t2);
1303		assertEquals(0, lock.getQueueLength());
1162	–	t1.join();
1163	–	t2.join();
1304		}
1305
1306		/**
1307		* getQueuedThreads includes waiting threads
1308		*/
1309		public void testGetQueuedThreads() throws InterruptedException {
1310	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1310	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1311		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1312		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1313		assertTrue(lock.getQueuedThreads().isEmpty());
1314		lock.writeLock().lock();
1315		assertTrue(lock.getQueuedThreads().isEmpty());
1316		t1.start();
1317	<	Thread.sleep(SHORT_DELAY_MS);
1317	>	waitForQueuedThread(lock, t1);
1318	>	assertEquals(1, lock.getQueuedThreads().size());
1319		assertTrue(lock.getQueuedThreads().contains(t1));
1320		t2.start();
1321	<	Thread.sleep(SHORT_DELAY_MS);
1321	>	waitForQueuedThread(lock, t2);
1322	>	assertEquals(2, lock.getQueuedThreads().size());
1323		assertTrue(lock.getQueuedThreads().contains(t1));
1324		assertTrue(lock.getQueuedThreads().contains(t2));
1325		t1.interrupt();
1326	<	Thread.sleep(SHORT_DELAY_MS);
1326	>	awaitTermination(t1);
1327		assertFalse(lock.getQueuedThreads().contains(t1));
1328		assertTrue(lock.getQueuedThreads().contains(t2));
1329	+	assertEquals(1, lock.getQueuedThreads().size());
1330		lock.writeLock().unlock();
1331	<	Thread.sleep(SHORT_DELAY_MS);
1331	>	awaitTermination(t2);
1332		assertTrue(lock.getQueuedThreads().isEmpty());
1190	–	t1.join();
1191	–	t2.join();
1333		}
1334
1335		/**
1336		* hasWaiters throws NPE if null
1337		*/
1338		public void testHasWaitersNPE() {
1339	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1339	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1340		try {
1341		lock.hasWaiters(null);
1342		shouldThrow();
#	Line 1206 | Line 1347 | public class ReentrantReadWriteLockTest
1347		* getWaitQueueLength throws NPE if null
1348		*/
1349		public void testGetWaitQueueLengthNPE() {
1350	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1350	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1351		try {
1352		lock.getWaitQueueLength(null);
1353		shouldThrow();
1354		} catch (NullPointerException success) {}
1355		}
1356
1216	–
1357		/**
1358		* getWaitingThreads throws NPE if null
1359		*/
1360		public void testGetWaitingThreadsNPE() {
1361	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1361	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1362		try {
1363		lock.getWaitingThreads(null);
1364		shouldThrow();
#	Line 1226 | Line 1366 | public class ReentrantReadWriteLockTest
1366		}
1367
1368		/**
1369	<	* hasWaiters throws IAE if not owned
1369	>	* hasWaiters throws IllegalArgumentException if not owned
1370		*/
1371		public void testHasWaitersIAE() {
1372	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1372	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1373		final Condition c = lock.writeLock().newCondition();
1374	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1374	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1375		try {
1376		lock2.hasWaiters(c);
1377		shouldThrow();
#	Line 1239 | Line 1379 | public class ReentrantReadWriteLockTest
1379		}
1380
1381		/**
1382	<	* hasWaiters throws IMSE if not locked
1382	>	* hasWaiters throws IllegalMonitorStateException if not locked
1383		*/
1384		public void testHasWaitersIMSE() {
1385	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1385	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1386		final Condition c = lock.writeLock().newCondition();
1387		try {
1388		lock.hasWaiters(c);
#	Line 1250 | Line 1390 | public class ReentrantReadWriteLockTest
1390		} catch (IllegalMonitorStateException success) {}
1391		}
1392
1253	–
1393		/**
1394	<	* getWaitQueueLength throws IAE if not owned
1394	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1395		*/
1396		public void testGetWaitQueueLengthIAE() {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398		final Condition c = lock.writeLock().newCondition();
1399	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1399	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1400		try {
1401		lock2.getWaitQueueLength(c);
1402		shouldThrow();
#	Line 1265 | Line 1404 | public class ReentrantReadWriteLockTest
1404		}
1405
1406		/**
1407	<	* getWaitQueueLength throws IMSE if not locked
1407	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1408		*/
1409		public void testGetWaitQueueLengthIMSE() {
1410	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1410	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1411		final Condition c = lock.writeLock().newCondition();
1412		try {
1413		lock.getWaitQueueLength(c);
#	Line 1276 | Line 1415 | public class ReentrantReadWriteLockTest
1415		} catch (IllegalMonitorStateException success) {}
1416		}
1417
1279	–
1418		/**
1419	<	* getWaitingThreads throws IAE if not owned
1419	>	* getWaitingThreads throws IllegalArgumentException if not owned
1420		*/
1421		public void testGetWaitingThreadsIAE() {
1422	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1422	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1423		final Condition c = lock.writeLock().newCondition();
1424	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1424	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1425		try {
1426		lock2.getWaitingThreads(c);
1427		shouldThrow();
#	Line 1291 | Line 1429 | public class ReentrantReadWriteLockTest
1429		}
1430
1431		/**
1432	<	* getWaitingThreads throws IMSE if not locked
1432	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1433		*/
1434		public void testGetWaitingThreadsIMSE() {
1435	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1435	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1436		final Condition c = lock.writeLock().newCondition();
1437		try {
1438		lock.getWaitingThreads(c);
#	Line 1302 | Line 1440 | public class ReentrantReadWriteLockTest
1440		} catch (IllegalMonitorStateException success) {}
1441		}
1442
1305	–
1443		/**
1444		* hasWaiters returns true when a thread is waiting, else false
1445		*/
1446		public void testHasWaiters() throws InterruptedException {
1447	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1447	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1448		final Condition c = lock.writeLock().newCondition();
1449	<	Thread t = new Thread(new Runnable() {
1450	<	public void run() {
1451	<	try {
1452	<	lock.writeLock().lock();
1453	<	threadAssertFalse(lock.hasWaiters(c));
1454	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1455	<	c.await();
1456	<	lock.writeLock().unlock();
1457	<	}
1458	<	catch (InterruptedException e) {
1459	<	threadUnexpectedException();
1460	<	}
1324	<	}
1325	<	});
1449	>	final CountDownLatch locked = new CountDownLatch(1);
1450	>	Thread t = newStartedThread(new CheckedRunnable() {
1451	>	public void realRun() throws InterruptedException {
1452	>	lock.writeLock().lock();
1453	>	assertHasNoWaiters(lock, c);
1454	>	assertFalse(lock.hasWaiters(c));
1455	>	locked.countDown();
1456	>	c.await();
1457	>	assertHasNoWaiters(lock, c);
1458	>	assertFalse(lock.hasWaiters(c));
1459	>	lock.writeLock().unlock();
1460	>	}});
1461
1462	<	t.start();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1462	>	locked.await();
1463		lock.writeLock().lock();
1464	+	assertHasWaiters(lock, c, t);
1465		assertTrue(lock.hasWaiters(c));
1331	–	assertEquals(1, lock.getWaitQueueLength(c));
1466		c.signal();
1467	<	lock.writeLock().unlock();
1334	<	Thread.sleep(SHORT_DELAY_MS);
1335	<	lock.writeLock().lock();
1467	>	assertHasNoWaiters(lock, c);
1468		assertFalse(lock.hasWaiters(c));
1337	–	assertEquals(0, lock.getWaitQueueLength(c));
1469		lock.writeLock().unlock();
1470	<	t.join(SHORT_DELAY_MS);
1471	<	assertFalse(t.isAlive());
1470	>	awaitTermination(t);
1471	>	assertHasNoWaiters(lock, c);
1472		}
1473
1474		/**
1475		* getWaitQueueLength returns number of waiting threads
1476		*/
1477		public void testGetWaitQueueLength() throws InterruptedException {
1478	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1478	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1479		final Condition c = lock.writeLock().newCondition();
1480	<	Thread t = new Thread(new Runnable() {
1481	<	public void run() {
1482	<	try {
1483	<	lock.writeLock().lock();
1484	<	threadAssertFalse(lock.hasWaiters(c));
1485	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1486	<	c.await();
1487	<	lock.writeLock().unlock();
1488	<	}
1358	<	catch (InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1480	>	final CountDownLatch locked = new CountDownLatch(1);
1481	>	Thread t = newStartedThread(new CheckedRunnable() {
1482	>	public void realRun() throws InterruptedException {
1483	>	lock.writeLock().lock();
1484	>	assertEquals(0, lock.getWaitQueueLength(c));
1485	>	locked.countDown();
1486	>	c.await();
1487	>	lock.writeLock().unlock();
1488	>	}});
1489
1490	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1490	>	locked.await();
1491		lock.writeLock().lock();
1492	<	assertTrue(lock.hasWaiters(c));
1492	>	assertHasWaiters(lock, c, t);
1493		assertEquals(1, lock.getWaitQueueLength(c));
1494		c.signal();
1495	<	lock.writeLock().unlock();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	lock.writeLock().lock();
1373	<	assertFalse(lock.hasWaiters(c));
1495	>	assertHasNoWaiters(lock, c);
1496		assertEquals(0, lock.getWaitQueueLength(c));
1497		lock.writeLock().unlock();
1498	<	t.join(SHORT_DELAY_MS);
1377	<	assertFalse(t.isAlive());
1498	>	awaitTermination(t);
1499		}
1500
1380	–
1501		/**
1502		* getWaitingThreads returns only and all waiting threads
1503		*/
1504		public void testGetWaitingThreads() throws InterruptedException {
1505	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1505	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1506		final Condition c = lock.writeLock().newCondition();
1507	<	Thread t1 = new Thread(new Runnable() {
1508	<	public void run() {
1509	<	try {
1510	<	lock.writeLock().lock();
1511	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1512	<	c.await();
1513	<	lock.writeLock().unlock();
1514	<	}
1515	<	catch (InterruptedException e) {
1516	<	threadUnexpectedException();
1517	<	}
1518	<	}
1519	<	});
1520	<
1521	<	Thread t2 = new Thread(new Runnable() {
1522	<	public void run() {
1523	<	try {
1524	<	lock.writeLock().lock();
1525	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	<	c.await();
1407	<	lock.writeLock().unlock();
1408	<	}
1409	<	catch (InterruptedException e) {
1410	<	threadUnexpectedException();
1411	<	}
1412	<	}
1413	<	});
1507	>	final CountDownLatch locked1 = new CountDownLatch(1);
1508	>	final CountDownLatch locked2 = new CountDownLatch(1);
1509	>	Thread t1 = new Thread(new CheckedRunnable() {
1510	>	public void realRun() throws InterruptedException {
1511	>	lock.writeLock().lock();
1512	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1513	>	locked1.countDown();
1514	>	c.await();
1515	>	lock.writeLock().unlock();
1516	>	}});
1517	>
1518	>	Thread t2 = new Thread(new CheckedRunnable() {
1519	>	public void realRun() throws InterruptedException {
1520	>	lock.writeLock().lock();
1521	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1522	>	locked2.countDown();
1523	>	c.await();
1524	>	lock.writeLock().unlock();
1525	>	}});
1526
1527		lock.writeLock().lock();
1528		assertTrue(lock.getWaitingThreads(c).isEmpty());
1529		lock.writeLock().unlock();
1530	+
1531		t1.start();
1532	<	Thread.sleep(SHORT_DELAY_MS);
1532	>	locked1.await();
1533		t2.start();
1534	<	Thread.sleep(SHORT_DELAY_MS);
1534	>	locked2.await();
1535	>
1536		lock.writeLock().lock();
1537		assertTrue(lock.hasWaiters(c));
1538		assertTrue(lock.getWaitingThreads(c).contains(t1));
1539		assertTrue(lock.getWaitingThreads(c).contains(t2));
1540	+	assertEquals(2, lock.getWaitingThreads(c).size());
1541		c.signalAll();
1542	+	assertHasNoWaiters(lock, c);
1543		lock.writeLock().unlock();
1544	<	Thread.sleep(SHORT_DELAY_MS);
1545	<	lock.writeLock().lock();
1546	<	assertFalse(lock.hasWaiters(c));
1547	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1548	<	lock.writeLock().unlock();
1433	<	t1.join(SHORT_DELAY_MS);
1434	<	t2.join(SHORT_DELAY_MS);
1435	<	assertFalse(t1.isAlive());
1436	<	assertFalse(t2.isAlive());
1544	>
1545	>	awaitTermination(t1);
1546	>	awaitTermination(t2);
1547	>
1548	>	assertHasNoWaiters(lock, c);
1549		}
1550
1551		/**

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