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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 1.57 by dl, Sat May 7 11:15:04 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 58 | Line 59 | public class ReentrantReadWriteLockTest
59		}
60
61		/**
62	+	* Releases write lock, checking that it had a hold count of 1.
63	+	*/
64	+	void releaseWriteLock(ReentrantReadWriteLock lock) {
65	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
66	+	assertTrue(writeLock.isHeldByCurrentThread());
67	+	writeLock.unlock();
68	+	assertFalse(writeLock.isHeldByCurrentThread());
69	+	}
70	+
71	+	/**
72	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
73	+	*/
74	+	void waitForQueuedThread(ReentrantReadWriteLock lock, Thread t) {
75	+	long startTime = System.nanoTime();
76	+	while (!lock.hasQueuedThread(t)) {
77	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
78	+	throw new AssertionError("timed out");
79	+	Thread.yield();
80	+	}
81	+	}
82	+
83	+	/**
84	+	* Checks that lock is not write-locked.
85	+	*/
86	+	void assertNotWriteLocked(ReentrantReadWriteLock lock) {
87	+	assertFalse(lock.isWriteLocked());
88	+	assertFalse(lock.isWriteLockedByCurrentThread());
89	+	assertEquals(0, lock.getWriteHoldCount());
90	+	}
91	+
92	+	/**
93	+	* Checks that condition c has no waiters.
94	+	*/
95	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
96	+	assertHasWaiters(lock, c, new Thread[] {});
97	+	}
98	+
99	+	/**
100	+	* Checks that condition c has exactly the given waiter threads.
101	+	*/
102	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
103	+	Thread... threads) {
104	+	lock.writeLock().lock();
105	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
106	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
107	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
108	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
109	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
110	+	new HashSet<Thread>(Arrays.asList(threads)));
111	+	lock.writeLock().unlock();
112	+	}
113	+
114	+	/**
115		* Constructor sets given fairness, and is in unlocked state
116		*/
117		public void testConstructor() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
119		assertFalse(rl.isFair());
120		assertFalse(rl.isWriteLocked());
121		assertEquals(0, rl.getReadLockCount());
122	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
122	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
123		assertTrue(r2.isFair());
124		assertFalse(r2.isWriteLocked());
125		assertEquals(0, r2.getReadLockCount());
126	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
126	>	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
127		assertFalse(r3.isFair());
128		assertFalse(r3.isWriteLocked());
129		assertEquals(0, r3.getReadLockCount());
#	Line 79 | Line 133 | public class ReentrantReadWriteLockTest
133		* write-locking and read-locking an unlocked lock succeed
134		*/
135		public void testLock() {
136	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
136	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
137		rl.writeLock().lock();
138		assertTrue(rl.isWriteLocked());
139		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 100 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
103	–
157		/**
158		* locking an unlocked fair lock succeeds
159		*/
160		public void testFairLock() {
161	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
161	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
162		rl.writeLock().lock();
163		assertTrue(rl.isWriteLocked());
164		assertTrue(rl.isWriteLockedByCurrentThread());
#	Line 130 | Line 183 | public class ReentrantReadWriteLockTest
183		* getWriteHoldCount returns number of recursive holds
184		*/
185		public void testGetWriteHoldCount() {
186	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	for (int i = 1; i <= SIZE; i++) {
188	<	lock.writeLock().lock();
189	<	assertEquals(i,lock.getWriteHoldCount());
190	<	}
191	<	for (int i = SIZE; i > 0; i--) {
192	<	lock.writeLock().unlock();
193	<	assertEquals(i-1,lock.getWriteHoldCount());
194	<	}
186	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	>	for (int i = 1; i <= SIZE; i++) {
188	>	lock.writeLock().lock();
189	>	assertEquals(i,lock.getWriteHoldCount());
190	>	}
191	>	for (int i = SIZE; i > 0; i--) {
192	>	lock.writeLock().unlock();
193	>	assertEquals(i-1,lock.getWriteHoldCount());
194	>	}
195		}
196
197		/**
198		* WriteLock.getHoldCount returns number of recursive holds
199		*/
200		public void testGetHoldCount() {
201	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	for (int i = 1; i <= SIZE; i++) {
203	<	lock.writeLock().lock();
204	<	assertEquals(i,lock.writeLock().getHoldCount());
205	<	}
206	<	for (int i = SIZE; i > 0; i--) {
207	<	lock.writeLock().unlock();
208	<	assertEquals(i-1,lock.writeLock().getHoldCount());
209	<	}
201	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	for (int i = 1; i <= SIZE; i++) {
203	>	lock.writeLock().lock();
204	>	assertEquals(i,lock.writeLock().getHoldCount());
205	>	}
206	>	for (int i = SIZE; i > 0; i--) {
207	>	lock.writeLock().unlock();
208	>	assertEquals(i-1,lock.writeLock().getHoldCount());
209	>	}
210		}
211
212		/**
213		* getReadHoldCount returns number of recursive holds
214		*/
215		public void testGetReadHoldCount() {
216	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	<	for (int i = 1; i <= SIZE; i++) {
218	<	lock.readLock().lock();
219	<	assertEquals(i,lock.getReadHoldCount());
220	<	}
221	<	for (int i = SIZE; i > 0; i--) {
222	<	lock.readLock().unlock();
223	<	assertEquals(i-1,lock.getReadHoldCount());
224	<	}
216	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	>	for (int i = 1; i <= SIZE; i++) {
218	>	lock.readLock().lock();
219	>	assertEquals(i,lock.getReadHoldCount());
220	>	}
221	>	for (int i = SIZE; i > 0; i--) {
222	>	lock.readLock().unlock();
223	>	assertEquals(i-1,lock.getReadHoldCount());
224	>	}
225		}
226
174	–
227		/**
228		* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testUnlock_IllegalMonitorStateException() {
231	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	<	try {
233	<	rl.writeLock().unlock();
234	<	shouldThrow();
235	<	} catch (IllegalMonitorStateException success) {}
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232	>	try {
233	>	rl.writeLock().unlock();
234	>	shouldThrow();
235	>	} catch (IllegalMonitorStateException success) {}
236		}
237
238	+	/**
239	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
240	+	*/
241	+	public void testReadUnlock_IllegalMonitorStateException() {
242	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
243	+	try {
244	+	rl.readLock().unlock();
245	+	shouldThrow();
246	+	} catch (IllegalMonitorStateException success) {}
247	+	}
248
249		/**
250		* write-lockInterruptibly is interruptible
251		*/
252		public void testWriteLockInterruptibly_Interrupted() throws Exception {
253	<	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	<
253	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254		lock.writeLock().lock();
255	<	t.start();
256	<	Thread.sleep(SHORT_DELAY_MS);
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256	>	public void realRun() throws InterruptedException {
257	>	lock.writeLock().lockInterruptibly();
258	>	}});
259	>
260	>	waitForQueuedThread(lock, t);
261		t.interrupt();
262	<	Thread.sleep(SHORT_DELAY_MS);
263	<	lock.writeLock().unlock();
209	<	t.join();
262	>	awaitTermination(t);
263	>	releaseWriteLock(lock);
264		}
265
266		/**
267		* timed write-tryLock is interruptible
268		*/
269		public void testWriteTryLock_Interrupted() throws InterruptedException {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.writeLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	try {
275	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
222	<	} catch (InterruptedException success) {}
223	<	}
224	<	});
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
273	>	public void realRun() throws InterruptedException {
274	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
275	>	}});
276
277	<	t.start();
277	>	waitForQueuedThread(lock, t);
278		t.interrupt();
279	<	lock.writeLock().unlock();
280	<	t.join();
279	>	awaitTermination(t);
280	>	releaseWriteLock(lock);
281		}
282
283		/**
284		* read-lockInterruptibly is interruptible
285		*/
286		public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
287	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	<	lock.writeLock().lock();
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run() {
291	<	try {
292	<	lock.readLock().lockInterruptibly();
242	<	} catch (InterruptedException success) {}
243	<	}
244	<	});
287	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288	>	lock.writeLock().lock();
289	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
290	>	public void realRun() throws InterruptedException {
291	>	lock.readLock().lockInterruptibly();
292	>	}});
293
294	<	t.start();
247	<	Thread.sleep(SHORT_DELAY_MS);
294	>	waitForQueuedThread(lock, t);
295		t.interrupt();
296	<	Thread.sleep(SHORT_DELAY_MS);
297	<	lock.writeLock().unlock();
251	<	t.join();
296	>	awaitTermination(t);
297	>	releaseWriteLock(lock);
298		}
299
300		/**
301		* timed read-tryLock is interruptible
302		*/
303		public void testReadTryLock_Interrupted() throws InterruptedException {
304	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	<	lock.writeLock().lock();
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	try {
309	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
264	<	threadShouldThrow();
265	<	} catch (InterruptedException success) {}
266	<	}
267	<	});
304	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305	>	lock.writeLock().lock();
306	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
309	>	}});
310
311	<	t.start();
311	>	waitForQueuedThread(lock, t);
312		t.interrupt();
313	<	t.join();
313	>	awaitTermination(t);
314	>	releaseWriteLock(lock);
315		}
316
274	–
317		/**
318		* write-tryLock fails if locked
319		*/
320		public void testWriteTryLockWhenLocked() throws InterruptedException {
321	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	<	lock.writeLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	threadAssertFalse(lock.writeLock().tryLock());
326	<	}
285	<	});
321	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322	>	lock.writeLock().lock();
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	assertFalse(lock.writeLock().tryLock());
326	>	}});
327
328	<	t.start();
329	<	t.join();
289	<	lock.writeLock().unlock();
328	>	awaitTermination(t);
329	>	releaseWriteLock(lock);
330		}
331
332		/**
333		* read-tryLock fails if locked
334		*/
335		public void testReadTryLockWhenLocked() throws InterruptedException {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	threadAssertFalse(lock.readLock().tryLock());
341	<	}
302	<	});
336	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	lock.writeLock().lock();
338	>	Thread t = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	assertFalse(lock.readLock().tryLock());
341	>	}});
342
343	<	t.start();
344	<	t.join();
306	<	lock.writeLock().unlock();
343	>	awaitTermination(t);
344	>	releaseWriteLock(lock);
345		}
346
347		/**
348		* Multiple threads can hold a read lock when not write-locked
349		*/
350		public void testMultipleReadLocks() throws InterruptedException {
351	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	<	lock.readLock().lock();
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	threadAssertTrue(lock.readLock().tryLock());
356	<	lock.readLock().unlock();
357	<	}
320	<	});
351	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352	>	lock.readLock().lock();
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() {
355	>	assertTrue(lock.readLock().tryLock());
356	>	lock.readLock().unlock();
357	>	}});
358
359	<	t.start();
323	<	t.join();
359	>	awaitTermination(t);
360		lock.readLock().unlock();
361		}
362
363		/**
364	<	* A writelock succeeds after reading threads unlock
364	>	* A writelock succeeds only after reading threads unlock
365		*/
366		public void testWriteAfterMultipleReadLocks() throws InterruptedException {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	lock.readLock().lock();
369	<	Thread t1 = new Thread(new Runnable() {
370	<	public void run() {
371	<	lock.readLock().lock();
372	<	lock.readLock().unlock();
373	<	}
374	<	});
375	<	Thread t2 = new Thread(new Runnable() {
376	<	public void run() {
377	<	lock.writeLock().lock();
378	<	lock.writeLock().unlock();
379	<	}
344	<	});
345	<
346	<	t1.start();
347	<	t2.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
367	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	>	lock.readLock().lock();
369	>	Thread t1 = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	lock.readLock().lock();
372	>	lock.readLock().unlock();
373	>	}});
374	>	Thread t2 = newStartedThread(new CheckedRunnable() {
375	>	public void realRun() {
376	>	lock.writeLock().lock();
377	>	lock.writeLock().unlock();
378	>	}});
379	>	delay(SHORT_DELAY_MS);
380		lock.readLock().unlock();
381	<	t1.join(MEDIUM_DELAY_MS);
382	<	t2.join(MEDIUM_DELAY_MS);
383	<	assertTrue(!t1.isAlive());
353	<	assertTrue(!t2.isAlive());
381	>	awaitTermination(t1);
382	>	awaitTermination(t2);
383	>	assertNotWriteLocked(lock);
384		}
385
386		/**
387	<	* Readlocks succeed after a writing thread unlocks
387	>	* Readlocks succeed only after a writing thread unlocks
388		*/
389		public void testReadAfterWriteLock() throws InterruptedException {
390	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391	<	lock.writeLock().lock();
392	<	Thread t1 = new Thread(new Runnable() {
393	<	public void run() {
394	<	lock.readLock().lock();
395	<	lock.readLock().unlock();
396	<	}
397	<	});
398	<	Thread t2 = new Thread(new Runnable() {
399	<	public void run() {
400	<	lock.readLock().lock();
401	<	lock.readLock().unlock();
402	<	}
403	<	});
404	<
405	<	t1.start();
406	<	t2.start();
407	<	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());
390	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391	>	lock.writeLock().lock();
392	>	Thread t1 = newStartedThread(new CheckedRunnable() {
393	>	public void realRun() {
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	}});
397	>	Thread t2 = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}});
402	>
403	>	waitForQueuedThread(lock, t1);
404	>	waitForQueuedThread(lock, t2);
405	>	releaseWriteLock(lock);
406	>	awaitTermination(t1);
407	>	awaitTermination(t2);
408		}
409
410		/**
411		* Read trylock succeeds if write locked by current thread
412		*/
413		public void testReadHoldingWriteLock() {
414	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
415	<	lock.writeLock().lock();
414	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
415	>	lock.writeLock().lock();
416		assertTrue(lock.readLock().tryLock());
417		lock.readLock().unlock();
418		lock.writeLock().unlock();
#	Line 398 | Line 423 | public class ReentrantReadWriteLockTest
423		* other threads are waiting for readlock
424		*/
425		public void testReadHoldingWriteLock2() throws InterruptedException {
426	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
427	<	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();
426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
427	>	lock.writeLock().lock();
428		lock.readLock().lock();
429		lock.readLock().unlock();
430	<	Thread.sleep(SHORT_DELAY_MS);
430	>
431	>	Thread t1 = newStartedThread(new CheckedRunnable() {
432	>	public void realRun() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}});
436	>	Thread t2 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.readLock().lock();
439	>	lock.readLock().unlock();
440	>	}});
441	>
442	>	waitForQueuedThread(lock, t1);
443	>	waitForQueuedThread(lock, t2);
444	>	assertTrue(lock.isWriteLockedByCurrentThread());
445		lock.readLock().lock();
446		lock.readLock().unlock();
447	<	lock.writeLock().unlock();
448	<	t1.join(MEDIUM_DELAY_MS);
449	<	t2.join(MEDIUM_DELAY_MS);
426	<	assertTrue(!t1.isAlive());
427	<	assertTrue(!t2.isAlive());
447	>	releaseWriteLock(lock);
448	>	awaitTermination(t1);
449	>	awaitTermination(t2);
450		}
451
452		/**
453	<	*  Read lock succeeds if write locked by current thread even if
453	>	* Read lock succeeds if write locked by current thread even if
454		* other threads are waiting for writelock
455		*/
456		public void testReadHoldingWriteLock3() throws InterruptedException {
457	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	<	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();
457	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	lock.writeLock().lock();
459		lock.readLock().lock();
460		lock.readLock().unlock();
461	<	Thread.sleep(SHORT_DELAY_MS);
461	>
462	>	Thread t1 = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() {
464	>	lock.writeLock().lock();
465	>	lock.writeLock().unlock();
466	>	}});
467	>	Thread t2 = newStartedThread(new CheckedRunnable() {
468	>	public void realRun() {
469	>	lock.writeLock().lock();
470	>	lock.writeLock().unlock();
471	>	}});
472	>
473	>	waitForQueuedThread(lock, t1);
474	>	waitForQueuedThread(lock, t2);
475	>	assertTrue(lock.isWriteLockedByCurrentThread());
476		lock.readLock().lock();
477		lock.readLock().unlock();
478	<	lock.writeLock().unlock();
479	<	t1.join(MEDIUM_DELAY_MS);
480	<	t2.join(MEDIUM_DELAY_MS);
460	<	assertTrue(!t1.isAlive());
461	<	assertTrue(!t2.isAlive());
478	>	releaseWriteLock(lock);
479	>	awaitTermination(t1);
480	>	awaitTermination(t2);
481		}
482
464	–
483		/**
484	<	*  Write lock succeeds if write locked by current thread even if
484	>	* Write lock succeeds if write locked by current thread even if
485		* other threads are waiting for writelock
486		*/
487		public void testWriteHoldingWriteLock4() throws InterruptedException {
488	<	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();
488	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
489		lock.writeLock().lock();
488	–	lock.writeLock().unlock();
489	–	Thread.sleep(SHORT_DELAY_MS);
490		lock.writeLock().lock();
491		lock.writeLock().unlock();
492	+
493	+	Thread t1 = newStartedThread(new CheckedRunnable() {
494	+	public void realRun() {
495	+	lock.writeLock().lock();
496	+	lock.writeLock().unlock();
497	+	}});
498	+	Thread t2 = newStartedThread(new CheckedRunnable() {
499	+	public void realRun() {
500	+	lock.writeLock().lock();
501	+	lock.writeLock().unlock();
502	+	}});
503	+
504	+	waitForQueuedThread(lock, t1);
505	+	waitForQueuedThread(lock, t2);
506	+	assertTrue(lock.isWriteLockedByCurrentThread());
507	+	assertEquals(1, lock.getWriteHoldCount());
508	+	lock.writeLock().lock();
509	+	assertTrue(lock.isWriteLockedByCurrentThread());
510	+	assertEquals(2, lock.getWriteHoldCount());
511		lock.writeLock().unlock();
512	<	t1.join(MEDIUM_DELAY_MS);
513	<	t2.join(MEDIUM_DELAY_MS);
514	<	assertTrue(!t1.isAlive());
496	<	assertTrue(!t2.isAlive());
512	>	releaseWriteLock(lock);
513	>	awaitTermination(t1);
514	>	awaitTermination(t2);
515		}
516
499	–
517		/**
518		* Fair Read trylock succeeds if write locked by current thread
519		*/
520		public void testReadHoldingWriteLockFair() {
521	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
522	<	lock.writeLock().lock();
521	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
522	>	lock.writeLock().lock();
523		assertTrue(lock.readLock().tryLock());
524		lock.readLock().unlock();
525		lock.writeLock().unlock();
#	Line 513 | Line 530 | public class ReentrantReadWriteLockTest
530		* other threads are waiting for readlock
531		*/
532		public void testReadHoldingWriteLockFair2() throws InterruptedException {
533	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
534	<	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();
533	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
534	>	lock.writeLock().lock();
535		lock.readLock().lock();
536		lock.readLock().unlock();
537	<	Thread.sleep(SHORT_DELAY_MS);
537	>
538	>	Thread t1 = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() {
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	}});
543	>	Thread t2 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() {
545	>	lock.readLock().lock();
546	>	lock.readLock().unlock();
547	>	}});
548	>
549	>	waitForQueuedThread(lock, t1);
550	>	waitForQueuedThread(lock, t2);
551	>	assertTrue(lock.isWriteLockedByCurrentThread());
552		lock.readLock().lock();
553		lock.readLock().unlock();
554	<	lock.writeLock().unlock();
555	<	t1.join(MEDIUM_DELAY_MS);
556	<	t2.join(MEDIUM_DELAY_MS);
541	<	assertTrue(!t1.isAlive());
542	<	assertTrue(!t2.isAlive());
554	>	releaseWriteLock(lock);
555	>	awaitTermination(t1);
556	>	awaitTermination(t2);
557		}
558
545	–
559		/**
560		* Fair Read lock succeeds if write locked by current thread even if
561		* other threads are waiting for writelock
562		*/
563		public void testReadHoldingWriteLockFair3() throws InterruptedException {
564	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
565	<	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();
564	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
565	>	lock.writeLock().lock();
566		lock.readLock().lock();
567		lock.readLock().unlock();
568	<	Thread.sleep(SHORT_DELAY_MS);
568	>
569	>	Thread t1 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.writeLock().lock();
572	>	lock.writeLock().unlock();
573	>	}});
574	>	Thread t2 = newStartedThread(new CheckedRunnable() {
575	>	public void realRun() {
576	>	lock.writeLock().lock();
577	>	lock.writeLock().unlock();
578	>	}});
579	>
580	>	waitForQueuedThread(lock, t1);
581	>	waitForQueuedThread(lock, t2);
582	>	assertTrue(lock.isWriteLockedByCurrentThread());
583		lock.readLock().lock();
584		lock.readLock().unlock();
585	<	lock.writeLock().unlock();
586	<	t1.join(MEDIUM_DELAY_MS);
587	<	t2.join(MEDIUM_DELAY_MS);
576	<	assertTrue(!t1.isAlive());
577	<	assertTrue(!t2.isAlive());
585	>	releaseWriteLock(lock);
586	>	awaitTermination(t1);
587	>	awaitTermination(t2);
588		}
589
580	–
590		/**
591		* Fair Write lock succeeds if write locked by current thread even if
592		* other threads are waiting for writelock
593		*/
594		public void testWriteHoldingWriteLockFair4() throws InterruptedException {
595	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596	<	lock.writeLock().lock();
597	<	Thread t1 = new Thread(new Runnable() {
598	<	public void run() {
599	<	lock.writeLock().lock();
600	<	lock.writeLock().unlock();
601	<	}
602	<	});
603	<	Thread t2 = new Thread(new Runnable() {
604	<	public void run() {
605	<	lock.writeLock().lock();
606	<	lock.writeLock().unlock();
598	<	}
599	<	});
595	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596	>	lock.writeLock().lock();
597	>	Thread t1 = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	lock.writeLock().lock();
600	>	lock.writeLock().unlock();
601	>	}});
602	>	Thread t2 = newStartedThread(new CheckedRunnable() {
603	>	public void realRun() {
604	>	lock.writeLock().lock();
605	>	lock.writeLock().unlock();
606	>	}});
607
608	<	t1.start();
609	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
608	>	waitForQueuedThread(lock, t1);
609	>	waitForQueuedThread(lock, t2);
610		assertTrue(lock.isWriteLockedByCurrentThread());
611	<	assertTrue(lock.getWriteHoldCount() == 1);
611	>	assertEquals(1, lock.getWriteHoldCount());
612		lock.writeLock().lock();
613	<	assertTrue(lock.getWriteHoldCount() == 2);
613	>	assertEquals(2, lock.getWriteHoldCount());
614		lock.writeLock().unlock();
615		lock.writeLock().lock();
616		lock.writeLock().unlock();
617	<	lock.writeLock().unlock();
618	<	t1.join(MEDIUM_DELAY_MS);
619	<	t2.join(MEDIUM_DELAY_MS);
614	<	assertTrue(!t1.isAlive());
615	<	assertTrue(!t2.isAlive());
617	>	releaseWriteLock(lock);
618	>	awaitTermination(t1);
619	>	awaitTermination(t2);
620		}
621
618	–
622		/**
623		* Read tryLock succeeds if readlocked but not writelocked
624		*/
625		public void testTryLockWhenReadLocked() throws InterruptedException {
626	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627	<	lock.readLock().lock();
628	<	Thread t = new Thread(new Runnable() {
629	<	public void run() {
630	<	threadAssertTrue(lock.readLock().tryLock());
631	<	lock.readLock().unlock();
632	<	}
630	<	});
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertTrue(lock.readLock().tryLock());
631	>	lock.readLock().unlock();
632	>	}});
633
634	<	t.start();
633	<	t.join();
634	>	awaitTermination(t);
635		lock.readLock().unlock();
636		}
637
637	–
638	–
638		/**
639		* write tryLock fails when readlocked
640		*/
641		public void testWriteTryLockWhenReadLocked() throws InterruptedException {
642	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	<	lock.readLock().lock();
644	<	Thread t = new Thread(new Runnable() {
645	<	public void run() {
646	<	threadAssertFalse(lock.writeLock().tryLock());
647	<	}
649	<	});
642	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	>	lock.readLock().lock();
644	>	Thread t = newStartedThread(new CheckedRunnable() {
645	>	public void realRun() {
646	>	assertFalse(lock.writeLock().tryLock());
647	>	}});
648
649	<	t.start();
652	<	t.join();
649	>	awaitTermination(t);
650		lock.readLock().unlock();
651		}
652
656	–
653		/**
654		* Fair Read tryLock succeeds if readlocked but not writelocked
655		*/
656		public void testTryLockWhenReadLockedFair() throws InterruptedException {
657	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
658	<	lock.readLock().lock();
659	<	Thread t = new Thread(new Runnable() {
660	<	public void run() {
661	<	threadAssertTrue(lock.readLock().tryLock());
662	<	lock.readLock().unlock();
663	<	}
668	<	});
657	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
658	>	lock.readLock().lock();
659	>	Thread t = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	assertTrue(lock.readLock().tryLock());
662	>	lock.readLock().unlock();
663	>	}});
664
665	<	t.start();
671	<	t.join();
665	>	awaitTermination(t);
666		lock.readLock().unlock();
667		}
668
675	–
676	–
669		/**
670		* Fair write tryLock fails when readlocked
671		*/
672		public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
673	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	<	lock.readLock().lock();
675	<	Thread t = new Thread(new Runnable() {
676	<	public void run() {
677	<	threadAssertFalse(lock.writeLock().tryLock());
678	<	}
687	<	});
673	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	>	lock.readLock().lock();
675	>	Thread t = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	assertFalse(lock.writeLock().tryLock());
678	>	}});
679
680	<	t.start();
690	<	t.join();
680	>	awaitTermination(t);
681		lock.readLock().unlock();
682		}
683
694	–
695	–
684		/**
685		* write timed tryLock times out if locked
686		*/
687		public void testWriteTryLock_Timeout() throws InterruptedException {
688	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	<	lock.writeLock().lock();
690	<	Thread t = new Thread(new Runnable() {
691	<	public void run() {
692	<	try {
693	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
706	<	} catch (Exception ex) {
707	<	threadUnexpectedException();
708	<	}
709	<	}
710	<	});
688	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689	>	lock.writeLock().lock();
690	>	Thread t = newStartedThread(new CheckedRunnable() {
691	>	public void realRun() throws InterruptedException {
692	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693	>	}});
694
695	<	t.start();
696	<	t.join();
695	>	awaitTermination(t);
696	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
697		lock.writeLock().unlock();
698		}
699
#	Line 718 | Line 701 | public class ReentrantReadWriteLockTest
701		* read timed tryLock times out if write-locked
702		*/
703		public void testReadTryLock_Timeout() throws InterruptedException {
704	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	<	lock.writeLock().lock();
706	<	Thread t = new Thread(new Runnable() {
707	<	public void run() {
708	<	try {
709	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
727	<	} catch (Exception ex) {
728	<	threadUnexpectedException();
729	<	}
730	<	}
731	<	});
704	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	lock.writeLock().lock();
706	>	Thread t = newStartedThread(new CheckedRunnable() {
707	>	public void realRun() throws InterruptedException {
708	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
709	>	}});
710
711	<	t.start();
712	<	t.join();
711	>	awaitTermination(t);
712	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
713		lock.writeLock().unlock();
714		}
715
738	–
716		/**
717		* write lockInterruptibly succeeds if lock free else is interruptible
718		*/
719		public void testWriteLockInterruptibly() throws InterruptedException {
720	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
720	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721		lock.writeLock().lockInterruptibly();
722	<	Thread t = new Thread(new Runnable() {
723	<	public void run() {
724	<	try {
725	<	lock.writeLock().lockInterruptibly();
749	<	threadShouldThrow();
750	<	}
751	<	catch (InterruptedException success) {
752	<	}
753	<	}
754	<	});
722	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
723	>	public void realRun() throws InterruptedException {
724	>	lock.writeLock().lockInterruptibly();
725	>	}});
726
727	<	t.start();
757	<	Thread.sleep(SHORT_DELAY_MS);
727	>	waitForQueuedThread(lock, t);
728		t.interrupt();
729	<	Thread.sleep(SHORT_DELAY_MS);
730	<	t.join();
761	<	lock.writeLock().unlock();
729	>	awaitTermination(t);
730	>	releaseWriteLock(lock);
731		}
732
733		/**
734	<	*  read lockInterruptibly succeeds if lock free else is interruptible
734	>	* read lockInterruptibly succeeds if lock free else is interruptible
735		*/
736		public void testReadLockInterruptibly() throws InterruptedException {
737	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
737	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738		lock.writeLock().lockInterruptibly();
739	<	Thread t = new Thread(new Runnable() {
740	<	public void run() {
741	<	try {
742	<	lock.readLock().lockInterruptibly();
774	<	threadShouldThrow();
775	<	}
776	<	catch (InterruptedException success) {
777	<	}
778	<	}
779	<	});
739	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	lock.readLock().lockInterruptibly();
742	>	}});
743
744	<	t.start();
782	<	Thread.sleep(SHORT_DELAY_MS);
744	>	waitForQueuedThread(lock, t);
745		t.interrupt();
746	<	t.join();
747	<	lock.writeLock().unlock();
746	>	awaitTermination(t);
747	>	releaseWriteLock(lock);
748		}
749
750		/**
751		* Calling await without holding lock throws IllegalMonitorStateException
752		*/
753		public void testAwait_IllegalMonitor() throws InterruptedException {
754	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
755		final Condition c = lock.writeLock().newCondition();
756		try {
757		c.await();
758		shouldThrow();
759		} catch (IllegalMonitorStateException success) {}
760	+	try {
761	+	c.await(LONG_DELAY_MS, MILLISECONDS);
762	+	shouldThrow();
763	+	} catch (IllegalMonitorStateException success) {}
764	+	try {
765	+	c.awaitNanos(100);
766	+	shouldThrow();
767	+	} catch (IllegalMonitorStateException success) {}
768	+	try {
769	+	c.awaitUninterruptibly();
770	+	shouldThrow();
771	+	} catch (IllegalMonitorStateException success) {}
772		}
773
774		/**
775		* Calling signal without holding lock throws IllegalMonitorStateException
776		*/
777		public void testSignal_IllegalMonitor() {
778	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
778	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
779		final Condition c = lock.writeLock().newCondition();
780		try {
781		c.signal();
#	Line 810 | Line 784 | public class ReentrantReadWriteLockTest
784		}
785
786		/**
787	+	* Calling signalAll without holding lock throws IllegalMonitorStateException
788	+	*/
789	+	public void testSignalAll_IllegalMonitor() {
790	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
791	+	final Condition c = lock.writeLock().newCondition();
792	+	try {
793	+	c.signalAll();
794	+	shouldThrow();
795	+	} catch (IllegalMonitorStateException success) {}
796	+	}
797	+
798	+	/**
799		* awaitNanos without a signal times out
800		*/
801		public void testAwaitNanos_Timeout() throws InterruptedException {
802	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
802	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803		final Condition c = lock.writeLock().newCondition();
818	–
804		lock.writeLock().lock();
805	<	long t = c.awaitNanos(100);
806	<	assertTrue(t <= 0);
805	>	long startTime = System.nanoTime();
806	>	long timeoutMillis = 10;
807	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
808	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
809	>	assertTrue(nanosRemaining <= 0);
810	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
811		lock.writeLock().unlock();
812		}
813
825	–
814		/**
815	<	*  timed await without a signal times out
815	>	* timed await without a signal times out
816		*/
817	<	public void testAwait_Timeout() {
818	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817	>	public void testAwait_Timeout() throws InterruptedException {
818	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819		final Condition c = lock.writeLock().newCondition();
820		lock.writeLock().lock();
821	+	long startTime = System.nanoTime();
822	+	long timeoutMillis = 10;
823	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
824	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
825		lock.writeLock().unlock();
826		}
827
828		/**
829		* awaitUntil without a signal times out
830		*/
831	<	public void testAwaitUntil_Timeout() {
832	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831	>	public void testAwaitUntil_Timeout() throws InterruptedException {
832	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
833		final Condition c = lock.writeLock().newCondition();
834		lock.writeLock().lock();
835		java.util.Date d = new java.util.Date();
836	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
837		lock.writeLock().unlock();
838		}
839
#	Line 848 | Line 841 | public class ReentrantReadWriteLockTest
841		* await returns when signalled
842		*/
843		public void testAwait() throws InterruptedException {
844	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845		final Condition c = lock.writeLock().newCondition();
846	<	Thread t = new Thread(new Runnable() {
847	<	public void run() {
848	<	try {
849	<	lock.writeLock().lock();
850	<	c.await();
851	<	lock.writeLock().unlock();
852	<	}
853	<	catch (InterruptedException e) {
861	<	threadUnexpectedException();
862	<	}
863	<	}
864	<	});
846	>	final CountDownLatch locked = new CountDownLatch(1);
847	>	Thread t = newStartedThread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.writeLock().lock();
850	>	locked.countDown();
851	>	c.await();
852	>	lock.writeLock().unlock();
853	>	}});
854
855	<	t.start();
867	<	Thread.sleep(SHORT_DELAY_MS);
855	>	locked.await();
856		lock.writeLock().lock();
857		c.signal();
858	+	assertTrue(t.isAlive());
859		lock.writeLock().unlock();
860	<	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	<	}
860	>	awaitTermination(t);
861		}
862
863		/**
#	Line 905 | Line 866 | public class ReentrantReadWriteLockTest
866		public void testAwaitUninterruptibly() throws InterruptedException {
867		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868		final Condition c = lock.writeLock().newCondition();
869	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
870	<
871	<	thread.start();
872	<
873	<	while (!thread.lockStarted) {
874	<	Thread.sleep(100);
875	<	}
869	>	final CountDownLatch locked = new CountDownLatch(1);
870	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
871	>	Thread t = newStartedThread(new CheckedRunnable() {
872	>	public void realRun() {
873	>	lock.writeLock().lock();
874	>	locked.countDown();
875	>	c.awaitUninterruptibly();
876	>	assertTrue(Thread.interrupted());
877	>	lock.writeLock().unlock();
878	>	}});
879
880	+	locked.await();
881		lock.writeLock().lock();
882	<	try {
883	<	thread.interrupt();
884	<	thread.canAwake = true;
885	<	c.signal();
886	<	} finally {
887	<	lock.writeLock().unlock();
888	<	}
889	<
925	<	thread.join();
926	<	assertTrue(thread.interrupted);
927	<	assertFalse(thread.isAlive());
882	>	lock.writeLock().unlock();
883	>	t.interrupt();
884	>	t.join(10);
885	>	assertTrue(t.isAlive());
886	>	lock.writeLock().lock();
887	>	c.signal();
888	>	lock.writeLock().unlock();
889	>	awaitTermination(t);
890		}
891
892		/**
893		* await is interruptible
894		*/
895		public void testAwait_Interrupt() throws InterruptedException {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
897		final Condition c = lock.writeLock().newCondition();
898	<	Thread t = new Thread(new Runnable() {
899	<	public void run() {
900	<	try {
901	<	lock.writeLock().lock();
902	<	c.await();
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch (InterruptedException success) {
907	<	}
908	<	}
909	<	});
898	>	final CountDownLatch locked = new CountDownLatch(1);
899	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
900	>	public void realRun() throws InterruptedException {
901	>	lock.writeLock().lock();
902	>	assertTrue(lock.isWriteLocked());
903	>	assertTrue(lock.isWriteLockedByCurrentThread());
904	>	assertHasNoWaiters(lock, c);
905	>	locked.countDown();
906	>	try {
907	>	c.await();
908	>	} finally {
909	>	assertTrue(lock.isWriteLocked());
910	>	assertTrue(lock.isWriteLockedByCurrentThread());
911	>	assertHasNoWaiters(lock, c);
912	>	lock.writeLock().unlock();
913	>	assertFalse(Thread.interrupted());
914	>	}
915	>	}});
916
917	<	t.start();
918	<	Thread.sleep(SHORT_DELAY_MS);
917	>	locked.await();
918	>	assertHasWaiters(lock, c, t);
919		t.interrupt();
920	<	t.join(SHORT_DELAY_MS);
921	<	assertFalse(t.isAlive());
920	>	awaitTermination(t);
921	>	assertFalse(lock.isWriteLocked());
922		}
923
924		/**
925		* awaitNanos is interruptible
926		*/
927		public void testAwaitNanos_Interrupt() throws InterruptedException {
928	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
929		final Condition c = lock.writeLock().newCondition();
930	<	Thread t = new Thread(new Runnable() {
931	<	public void run() {
932	<	try {
933	<	lock.writeLock().lock();
934	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
935	<	lock.writeLock().unlock();
936	<	threadShouldThrow();
937	<	}
938	<	catch (InterruptedException success) {
939	<	}
940	<	}
941	<	});
930	>	final CountDownLatch locked = new CountDownLatch(1);
931	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
932	>	public void realRun() throws InterruptedException {
933	>	lock.writeLock().lock();
934	>	assertTrue(lock.isWriteLocked());
935	>	assertTrue(lock.isWriteLockedByCurrentThread());
936	>	assertHasNoWaiters(lock, c);
937	>	locked.countDown();
938	>	try {
939	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
940	>	} finally {
941	>	assertTrue(lock.isWriteLocked());
942	>	assertTrue(lock.isWriteLockedByCurrentThread());
943	>	assertHasNoWaiters(lock, c);
944	>	lock.writeLock().unlock();
945	>	assertFalse(Thread.interrupted());
946	>	}
947	>	}});
948
949	<	t.start();
950	<	Thread.sleep(SHORT_DELAY_MS);
949	>	locked.await();
950	>	assertHasWaiters(lock, c, t);
951		t.interrupt();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
952	>	awaitTermination(t);
953	>	assertFalse(lock.isWriteLocked());
954		}
955
956		/**
957		* awaitUntil is interruptible
958		*/
959		public void testAwaitUntil_Interrupt() throws InterruptedException {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
961		final Condition c = lock.writeLock().newCondition();
962	<	Thread t = new Thread(new Runnable() {
963	<	public void run() {
964	<	try {
965	<	lock.writeLock().lock();
966	<	java.util.Date d = new java.util.Date();
967	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
968	<	lock.writeLock().unlock();
969	<	threadShouldThrow();
970	<	}
971	<	catch (InterruptedException success) {
972	<	}
973	<	}
974	<	});
962	>	final CountDownLatch locked = new CountDownLatch(1);
963	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
964	>	public void realRun() throws InterruptedException {
965	>	lock.writeLock().lock();
966	>	assertTrue(lock.isWriteLocked());
967	>	assertTrue(lock.isWriteLockedByCurrentThread());
968	>	assertHasNoWaiters(lock, c);
969	>	locked.countDown();
970	>	java.util.Date d = new java.util.Date();
971	>	try {
972	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
973	>	} finally {
974	>	assertTrue(lock.isWriteLocked());
975	>	assertTrue(lock.isWriteLockedByCurrentThread());
976	>	assertHasNoWaiters(lock, c);
977	>	lock.writeLock().unlock();
978	>	assertFalse(Thread.interrupted());
979	>	}
980	>	}});
981
982	<	t.start();
983	<	Thread.sleep(SHORT_DELAY_MS);
982	>	locked.await();
983	>	assertHasWaiters(lock, c, t);
984		t.interrupt();
985	<	t.join(SHORT_DELAY_MS);
986	<	assertFalse(t.isAlive());
985	>	awaitTermination(t);
986	>	assertFalse(lock.isWriteLocked());
987		}
988
989		/**
990		* signalAll wakes up all threads
991		*/
992		public void testSignalAll() throws InterruptedException {
993	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
993	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
994		final Condition c = lock.writeLock().newCondition();
995	<	Thread t1 = new Thread(new Runnable() {
996	<	public void run() {
997	<	try {
998	<	lock.writeLock().lock();
999	<	c.await();
1000	<	lock.writeLock().unlock();
1001	<	}
1002	<	catch (InterruptedException e) {
1003	<	threadUnexpectedException();
1004	<	}
1005	<	}
1006	<	});
1007	<
1008	<	Thread t2 = new Thread(new Runnable() {
1009	<	public void run() {
1010	<	try {
1011	<	lock.writeLock().lock();
1012	<	c.await();
1013	<	lock.writeLock().unlock();
1014	<	}
1015	<	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();
995	>	final CountDownLatch locked = new CountDownLatch(2);
996	>	final Lock writeLock = lock.writeLock();
997	>	Thread t1 = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() throws InterruptedException {
999	>	writeLock.lock();
1000	>	locked.countDown();
1001	>	c.await();
1002	>	writeLock.unlock();
1003	>	}});
1004	>
1005	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1006	>	public void realRun() throws InterruptedException {
1007	>	writeLock.lock();
1008	>	locked.countDown();
1009	>	c.await();
1010	>	writeLock.unlock();
1011	>	}});
1012	>
1013	>	locked.await();
1014	>	writeLock.lock();
1015	>	assertHasWaiters(lock, c, t1, t2);
1016		c.signalAll();
1017	<	lock.writeLock().unlock();
1018	<	t1.join(SHORT_DELAY_MS);
1019	<	t2.join(SHORT_DELAY_MS);
1020	<	assertFalse(t1.isAlive());
1021	<	assertFalse(t2.isAlive());
1017	>	assertHasNoWaiters(lock, c);
1018	>	writeLock.unlock();
1019	>	awaitTermination(t1);
1020	>	awaitTermination(t2);
1021	>	}
1022	>
1023	>	/**
1024	>	* signal wakes up waiting threads in FIFO order.
1025	>	*/
1026	>	public void testSignalWakesFifo() throws InterruptedException {
1027	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1028	>	final Condition c = lock.writeLock().newCondition();
1029	>	final CountDownLatch locked1 = new CountDownLatch(1);
1030	>	final CountDownLatch locked2 = new CountDownLatch(1);
1031	>	final Lock writeLock = lock.writeLock();
1032	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	writeLock.lock();
1035	>	locked1.countDown();
1036	>	c.await();
1037	>	writeLock.unlock();
1038	>	}});
1039	>
1040	>	locked1.await();
1041	>
1042	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1043	>	public void realRun() throws InterruptedException {
1044	>	writeLock.lock();
1045	>	locked2.countDown();
1046	>	c.await();
1047	>	writeLock.unlock();
1048	>	}});
1049	>
1050	>	locked2.await();
1051	>
1052	>	writeLock.lock();
1053	>	assertHasWaiters(lock, c, t1, t2);
1054	>	assertFalse(lock.hasQueuedThreads());
1055	>	c.signal();
1056	>	assertHasWaiters(lock, c, t2);
1057	>	assertTrue(lock.hasQueuedThread(t1));
1058	>	assertFalse(lock.hasQueuedThread(t2));
1059	>	c.signal();
1060	>	assertHasNoWaiters(lock, c);
1061	>	assertTrue(lock.hasQueuedThread(t1));
1062	>	assertTrue(lock.hasQueuedThread(t2));
1063	>	writeLock.unlock();
1064	>	awaitTermination(t1);
1065	>	awaitTermination(t2);
1066		}
1067
1068		/**
#	Line 1074 | Line 1089 | public class ReentrantReadWriteLockTest
1089		* hasQueuedThreads reports whether there are waiting threads
1090		*/
1091		public void testhasQueuedThreads() throws InterruptedException {
1092	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1092	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1093		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1094		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1095		assertFalse(lock.hasQueuedThreads());
1096		lock.writeLock().lock();
1097	+	assertFalse(lock.hasQueuedThreads());
1098	+	long startTime = System.nanoTime();
1099		t1.start();
1100	<	Thread.sleep(SHORT_DELAY_MS);
1084	<	assertTrue(lock.hasQueuedThreads());
1100	>	waitForQueuedThread(lock, t1);
1101		t2.start();
1102	<	Thread.sleep(SHORT_DELAY_MS);
1102	>	waitForQueuedThread(lock, t2);
1103		assertTrue(lock.hasQueuedThreads());
1104		t1.interrupt();
1105	<	Thread.sleep(SHORT_DELAY_MS);
1105	>	awaitTermination(t1);
1106		assertTrue(lock.hasQueuedThreads());
1107		lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1108	>	awaitTermination(t2);
1109		assertFalse(lock.hasQueuedThreads());
1094	–	t1.join();
1095	–	t2.join();
1110		}
1111
1112		/**
1113		* hasQueuedThread(null) throws NPE
1114		*/
1115		public void testHasQueuedThreadNPE() {
1116	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1116	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1117		try {
1118		sync.hasQueuedThread(null);
1119		shouldThrow();
1120	<	} catch (NullPointerException success) {
1107	<	}
1120	>	} catch (NullPointerException success) {}
1121		}
1122
1123		/**
1124		* hasQueuedThread reports whether a thread is queued.
1125		*/
1126		public void testHasQueuedThread() throws InterruptedException {
1127	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1128	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1129	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1130	<	assertFalse(sync.hasQueuedThread(t1));
1131	<	assertFalse(sync.hasQueuedThread(t2));
1132	<	sync.writeLock().lock();
1127	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1128	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1129	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1130	>	assertFalse(lock.hasQueuedThread(t1));
1131	>	assertFalse(lock.hasQueuedThread(t2));
1132	>	lock.writeLock().lock();
1133	>	long startTime = System.nanoTime();
1134		t1.start();
1135	<	Thread.sleep(SHORT_DELAY_MS);
1136	<	assertTrue(sync.hasQueuedThread(t1));
1135	>	waitForQueuedThread(lock, t1);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138		t2.start();
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	assertTrue(sync.hasQueuedThread(t1));
1141	<	assertTrue(sync.hasQueuedThread(t2));
1139	>	waitForQueuedThread(lock, t2);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142		t1.interrupt();
1143	<	Thread.sleep(SHORT_DELAY_MS);
1144	<	assertFalse(sync.hasQueuedThread(t1));
1145	<	assertTrue(sync.hasQueuedThread(t2));
1146	<	sync.writeLock().unlock();
1147	<	Thread.sleep(SHORT_DELAY_MS);
1148	<	assertFalse(sync.hasQueuedThread(t1));
1149	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	assertFalse(sync.hasQueuedThread(t2));
1136	<	t1.join();
1137	<	t2.join();
1143	>	awaitTermination(t1);
1144	>	assertFalse(lock.hasQueuedThread(t1));
1145	>	assertTrue(lock.hasQueuedThread(t2));
1146	>	lock.writeLock().unlock();
1147	>	awaitTermination(t2);
1148	>	assertFalse(lock.hasQueuedThread(t1));
1149	>	assertFalse(lock.hasQueuedThread(t2));
1150		}
1151
1140	–
1152		/**
1153		* getQueueLength reports number of waiting threads
1154		*/
1155		public void testGetQueueLength() throws InterruptedException {
1156	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1156	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1158		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1159		assertEquals(0, lock.getQueueLength());
1160		lock.writeLock().lock();
1161	+	long startTime = System.nanoTime();
1162		t1.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1163	>	waitForQueuedThread(lock, t1);
1164		assertEquals(1, lock.getQueueLength());
1165		t2.start();
1166	<	Thread.sleep(SHORT_DELAY_MS);
1166	>	waitForQueuedThread(lock, t2);
1167		assertEquals(2, lock.getQueueLength());
1168		t1.interrupt();
1169	<	Thread.sleep(SHORT_DELAY_MS);
1169	>	awaitTermination(t1);
1170		assertEquals(1, lock.getQueueLength());
1171		lock.writeLock().unlock();
1172	<	Thread.sleep(SHORT_DELAY_MS);
1172	>	awaitTermination(t2);
1173		assertEquals(0, lock.getQueueLength());
1162	–	t1.join();
1163	–	t2.join();
1174		}
1175
1176		/**
1177		* getQueuedThreads includes waiting threads
1178		*/
1179		public void testGetQueuedThreads() throws InterruptedException {
1180	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1180	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1181		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1182		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1183		assertTrue(lock.getQueuedThreads().isEmpty());
1184		lock.writeLock().lock();
1185	+	long startTime = System.nanoTime();
1186		assertTrue(lock.getQueuedThreads().isEmpty());
1187		t1.start();
1188	<	Thread.sleep(SHORT_DELAY_MS);
1188	>	waitForQueuedThread(lock, t1);
1189	>	assertEquals(1, lock.getQueuedThreads().size());
1190		assertTrue(lock.getQueuedThreads().contains(t1));
1191		t2.start();
1192	<	Thread.sleep(SHORT_DELAY_MS);
1192	>	waitForQueuedThread(lock, t2);
1193	>	assertEquals(2, lock.getQueuedThreads().size());
1194		assertTrue(lock.getQueuedThreads().contains(t1));
1195		assertTrue(lock.getQueuedThreads().contains(t2));
1196		t1.interrupt();
1197	<	Thread.sleep(SHORT_DELAY_MS);
1197	>	awaitTermination(t1);
1198		assertFalse(lock.getQueuedThreads().contains(t1));
1199		assertTrue(lock.getQueuedThreads().contains(t2));
1200	+	assertEquals(1, lock.getQueuedThreads().size());
1201		lock.writeLock().unlock();
1202	<	Thread.sleep(SHORT_DELAY_MS);
1202	>	awaitTermination(t2);
1203		assertTrue(lock.getQueuedThreads().isEmpty());
1190	–	t1.join();
1191	–	t2.join();
1204		}
1205
1206		/**
1207		* hasWaiters throws NPE if null
1208		*/
1209		public void testHasWaitersNPE() {
1210	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1210	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1211		try {
1212		lock.hasWaiters(null);
1213		shouldThrow();
#	Line 1206 | Line 1218 | public class ReentrantReadWriteLockTest
1218		* getWaitQueueLength throws NPE if null
1219		*/
1220		public void testGetWaitQueueLengthNPE() {
1221	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1221	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222		try {
1223		lock.getWaitQueueLength(null);
1224		shouldThrow();
1225		} catch (NullPointerException success) {}
1226		}
1227
1216	–
1228		/**
1229		* getWaitingThreads throws NPE if null
1230		*/
1231		public void testGetWaitingThreadsNPE() {
1232	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1232	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1233		try {
1234		lock.getWaitingThreads(null);
1235		shouldThrow();
#	Line 1229 | Line 1240 | public class ReentrantReadWriteLockTest
1240		* hasWaiters throws IAE if not owned
1241		*/
1242		public void testHasWaitersIAE() {
1243	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1244		final Condition c = lock.writeLock().newCondition();
1245	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1245	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1246		try {
1247		lock2.hasWaiters(c);
1248		shouldThrow();
#	Line 1242 | Line 1253 | public class ReentrantReadWriteLockTest
1253		* hasWaiters throws IMSE if not locked
1254		*/
1255		public void testHasWaitersIMSE() {
1256	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1256	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1257		final Condition c = lock.writeLock().newCondition();
1258		try {
1259		lock.hasWaiters(c);
#	Line 1250 | Line 1261 | public class ReentrantReadWriteLockTest
1261		} catch (IllegalMonitorStateException success) {}
1262		}
1263
1253	–
1264		/**
1265		* getWaitQueueLength throws IAE if not owned
1266		*/
1267		public void testGetWaitQueueLengthIAE() {
1268	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1269		final Condition c = lock.writeLock().newCondition();
1270	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1270	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1271		try {
1272		lock2.getWaitQueueLength(c);
1273		shouldThrow();
#	Line 1268 | Line 1278 | public class ReentrantReadWriteLockTest
1278		* getWaitQueueLength throws IMSE if not locked
1279		*/
1280		public void testGetWaitQueueLengthIMSE() {
1281	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1281	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1282		final Condition c = lock.writeLock().newCondition();
1283		try {
1284		lock.getWaitQueueLength(c);
#	Line 1276 | Line 1286 | public class ReentrantReadWriteLockTest
1286		} catch (IllegalMonitorStateException success) {}
1287		}
1288
1279	–
1289		/**
1290		* getWaitingThreads throws IAE if not owned
1291		*/
1292		public void testGetWaitingThreadsIAE() {
1293	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1293	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1294		final Condition c = lock.writeLock().newCondition();
1295	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1295	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1296		try {
1297		lock2.getWaitingThreads(c);
1298		shouldThrow();
#	Line 1294 | Line 1303 | public class ReentrantReadWriteLockTest
1303		* getWaitingThreads throws IMSE if not locked
1304		*/
1305		public void testGetWaitingThreadsIMSE() {
1306	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1306	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1307		final Condition c = lock.writeLock().newCondition();
1308		try {
1309		lock.getWaitingThreads(c);
#	Line 1302 | Line 1311 | public class ReentrantReadWriteLockTest
1311		} catch (IllegalMonitorStateException success) {}
1312		}
1313
1305	–
1314		/**
1315		* hasWaiters returns true when a thread is waiting, else false
1316		*/
1317		public void testHasWaiters() throws InterruptedException {
1318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1318	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1319		final Condition c = lock.writeLock().newCondition();
1320	<	Thread t = new Thread(new Runnable() {
1321	<	public void run() {
1322	<	try {
1323	<	lock.writeLock().lock();
1324	<	threadAssertFalse(lock.hasWaiters(c));
1325	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1326	<	c.await();
1327	<	lock.writeLock().unlock();
1328	<	}
1329	<	catch (InterruptedException e) {
1322	<	threadUnexpectedException();
1323	<	}
1324	<	}
1325	<	});
1320	>	final CountDownLatch locked = new CountDownLatch(1);
1321	>	Thread t = newStartedThread(new CheckedRunnable() {
1322	>	public void realRun() throws InterruptedException {
1323	>	lock.writeLock().lock();
1324	>	assertFalse(lock.hasWaiters(c));
1325	>	locked.countDown();
1326	>	assertEquals(0, lock.getWaitQueueLength(c));
1327	>	c.await();
1328	>	lock.writeLock().unlock();
1329	>	}});
1330
1331	<	t.start();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1331	>	locked.await();
1332		lock.writeLock().lock();
1333		assertTrue(lock.hasWaiters(c));
1334		assertEquals(1, lock.getWaitQueueLength(c));
1335		c.signal();
1336	+	assertHasNoWaiters(lock, c);
1337		lock.writeLock().unlock();
1338	<	Thread.sleep(SHORT_DELAY_MS);
1339	<	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());
1338	>	awaitTermination(t);
1339	>	assertHasNoWaiters(lock, c);
1340		}
1341
1342		/**
1343		* getWaitQueueLength returns number of waiting threads
1344		*/
1345		public void testGetWaitQueueLength() throws InterruptedException {
1346	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1346	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1347		final Condition c = lock.writeLock().newCondition();
1348	<	Thread t = new Thread(new Runnable() {
1349	<	public void run() {
1350	<	try {
1351	<	lock.writeLock().lock();
1352	<	threadAssertFalse(lock.hasWaiters(c));
1353	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1354	<	c.await();
1355	<	lock.writeLock().unlock();
1356	<	}
1358	<	catch (InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1348	>	final CountDownLatch locked = new CountDownLatch(1);
1349	>	Thread t = newStartedThread(new CheckedRunnable() {
1350	>	public void realRun() throws InterruptedException {
1351	>	lock.writeLock().lock();
1352	>	assertEquals(0, lock.getWaitQueueLength(c));
1353	>	locked.countDown();
1354	>	c.await();
1355	>	lock.writeLock().unlock();
1356	>	}});
1357
1358	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1358	>	locked.await();
1359		lock.writeLock().lock();
1360	<	assertTrue(lock.hasWaiters(c));
1360	>	assertHasWaiters(lock, c, t);
1361		assertEquals(1, lock.getWaitQueueLength(c));
1362		c.signal();
1363	<	lock.writeLock().unlock();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	lock.writeLock().lock();
1373	<	assertFalse(lock.hasWaiters(c));
1363	>	assertHasNoWaiters(lock, c);
1364		assertEquals(0, lock.getWaitQueueLength(c));
1365		lock.writeLock().unlock();
1366	<	t.join(SHORT_DELAY_MS);
1377	<	assertFalse(t.isAlive());
1366	>	awaitTermination(t);
1367		}
1368
1380	–
1369		/**
1370		* getWaitingThreads returns only and all waiting threads
1371		*/
1372		public void testGetWaitingThreads() throws InterruptedException {
1373	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1373	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1374		final Condition c = lock.writeLock().newCondition();
1375	<	Thread t1 = new Thread(new Runnable() {
1376	<	public void run() {
1377	<	try {
1378	<	lock.writeLock().lock();
1379	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1380	<	c.await();
1381	<	lock.writeLock().unlock();
1382	<	}
1383	<	catch (InterruptedException e) {
1384	<	threadUnexpectedException();
1385	<	}
1386	<	}
1387	<	});
1388	<
1389	<	Thread t2 = new Thread(new Runnable() {
1390	<	public void run() {
1391	<	try {
1392	<	lock.writeLock().lock();
1393	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	<	c.await();
1407	<	lock.writeLock().unlock();
1408	<	}
1409	<	catch (InterruptedException e) {
1410	<	threadUnexpectedException();
1411	<	}
1412	<	}
1413	<	});
1375	>	final CountDownLatch locked1 = new CountDownLatch(1);
1376	>	final CountDownLatch locked2 = new CountDownLatch(1);
1377	>	Thread t1 = new Thread(new CheckedRunnable() {
1378	>	public void realRun() throws InterruptedException {
1379	>	lock.writeLock().lock();
1380	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1381	>	locked1.countDown();
1382	>	c.await();
1383	>	lock.writeLock().unlock();
1384	>	}});
1385	>
1386	>	Thread t2 = new Thread(new CheckedRunnable() {
1387	>	public void realRun() throws InterruptedException {
1388	>	lock.writeLock().lock();
1389	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1390	>	locked2.countDown();
1391	>	c.await();
1392	>	lock.writeLock().unlock();
1393	>	}});
1394
1395		lock.writeLock().lock();
1396		assertTrue(lock.getWaitingThreads(c).isEmpty());
1397		lock.writeLock().unlock();
1398	+
1399		t1.start();
1400	<	Thread.sleep(SHORT_DELAY_MS);
1400	>	locked1.await();
1401		t2.start();
1402	<	Thread.sleep(SHORT_DELAY_MS);
1402	>	locked2.await();
1403	>
1404		lock.writeLock().lock();
1405		assertTrue(lock.hasWaiters(c));
1406		assertTrue(lock.getWaitingThreads(c).contains(t1));
1407		assertTrue(lock.getWaitingThreads(c).contains(t2));
1408	+	assertEquals(2, lock.getWaitingThreads(c).size());
1409		c.signalAll();
1410	+	assertHasNoWaiters(lock, c);
1411		lock.writeLock().unlock();
1412	<	Thread.sleep(SHORT_DELAY_MS);
1413	<	lock.writeLock().lock();
1414	<	assertFalse(lock.hasWaiters(c));
1415	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1416	<	lock.writeLock().unlock();
1433	<	t1.join(SHORT_DELAY_MS);
1434	<	t2.join(SHORT_DELAY_MS);
1435	<	assertFalse(t1.isAlive());
1436	<	assertFalse(t2.isAlive());
1412	>
1413	>	awaitTermination(t1);
1414	>	awaitTermination(t2);
1415	>
1416	>	assertHasNoWaiters(lock, c);
1417		}
1418
1419		/**

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