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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.12 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.45 by jsr166, Sun May 1 23:49:41 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.util.*;
15
16		public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantReadWriteLock lock;
29		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	<	public void run() {
31	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 38 | Line 37 | public class ReentrantReadWriteLockTest
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55	>	}
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
59		}
60
61		/**
62		* Constructor sets given fairness, and is in unlocked state
63		*/
64	<	public void testConstructor() {
65	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
64	>	public void testConstructor() {
65	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
66		assertFalse(rl.isFair());
67		assertFalse(rl.isWriteLocked());
68		assertEquals(0, rl.getReadLockCount());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
72		assertEquals(0, r2.getReadLockCount());
73	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	+	assertFalse(r3.isFair());
75	+	assertFalse(r3.isWriteLocked());
76	+	assertEquals(0, r3.getReadLockCount());
77		}
78
79		/**
80		* write-locking and read-locking an unlocked lock succeed
81		*/
82	<	public void testLock() {
83	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	>	public void testLock() {
83	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84		rl.writeLock().lock();
85		assertTrue(rl.isWriteLocked());
86		assertTrue(rl.isWriteLockedByCurrentThread());
87	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
88		assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
93		assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
#	Line 100 | Line 105 | public class ReentrantReadWriteLockTest
105		/**
106		* locking an unlocked fair lock succeeds
107		*/
108	<	public void testFairLock() {
109	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	>	public void testFairLock() {
109	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
110		rl.writeLock().lock();
111		assertTrue(rl.isWriteLocked());
112		assertTrue(rl.isWriteLockedByCurrentThread());
113	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
114		assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
119		assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
#	Line 123 | Line 130 | public class ReentrantReadWriteLockTest
130		/**
131		* getWriteHoldCount returns number of recursive holds
132		*/
133	<	public void testGetHoldCount() {
134	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	<	for(int i = 1; i <= SIZE; i++) {
136	<	lock.writeLock().lock();
137	<	assertEquals(i,lock.getWriteHoldCount());
138	<	}
139	<	for(int i = SIZE; i > 0; i--) {
140	<	lock.writeLock().unlock();
141	<	assertEquals(i-1,lock.getWriteHoldCount());
142	<	}
133	>	public void testGetWriteHoldCount() {
134	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	>	for (int i = 1; i <= SIZE; i++) {
136	>	lock.writeLock().lock();
137	>	assertEquals(i,lock.getWriteHoldCount());
138	>	}
139	>	for (int i = SIZE; i > 0; i--) {
140	>	lock.writeLock().unlock();
141	>	assertEquals(i-1,lock.getWriteHoldCount());
142	>	}
143		}
137	–
144
145		/**
146	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
146	>	* WriteLock.getHoldCount returns number of recursive holds
147		*/
148	<	public void testUnlock_IllegalMonitorStateException() {
149	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
150	<	try {
151	<	rl.writeLock().unlock();
152	<	shouldThrow();
153	<	} catch(IllegalMonitorStateException success){}
148	>	public void testGetHoldCount() {
149	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	>	for (int i = 1; i <= SIZE; i++) {
151	>	lock.writeLock().lock();
152	>	assertEquals(i,lock.writeLock().getHoldCount());
153	>	}
154	>	for (int i = SIZE; i > 0; i--) {
155	>	lock.writeLock().unlock();
156	>	assertEquals(i-1,lock.writeLock().getHoldCount());
157	>	}
158		}
159
150	–
160		/**
161	<	* write-lockInterruptibly is interruptible
161	>	* getReadHoldCount returns number of recursive holds
162		*/
163	<	public void testWriteLockInterruptibly_Interrupted() {
164	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	lock.writeLock().lock();
166	<	Thread t = new Thread(new Runnable() {
167	<	public void run() {
168	<	try {
169	<	lock.writeLock().lockInterruptibly();
170	<	threadShouldThrow();
171	<	} catch(InterruptedException success){}
163	<	}
164	<	});
165	<	try {
166	<	t.start();
167	<	t.interrupt();
168	<	lock.writeLock().unlock();
169	<	t.join();
170	<	} catch(Exception e){
171	<	unexpectedException();
172	<	}
173	<	}
174	<
175	<	/**
176	<	* timed write-trylock is interruptible
177	<	*/
178	<	public void testWriteTryLock_Interrupted() {
179	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
180	<	lock.writeLock().lock();
181	<	Thread t = new Thread(new Runnable() {
182	<	public void run() {
183	<	try {
184	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
185	<	threadShouldThrow();
186	<	} catch(InterruptedException success){}
187	<	}
188	<	});
189	<	try {
190	<	t.start();
191	<	t.interrupt();
192	<	lock.writeLock().unlock();
193	<	t.join();
194	<	} catch(Exception e){
195	<	unexpectedException();
163	>	public void testGetReadHoldCount() {
164	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	>	for (int i = 1; i <= SIZE; i++) {
166	>	lock.readLock().lock();
167	>	assertEquals(i,lock.getReadHoldCount());
168	>	}
169	>	for (int i = SIZE; i > 0; i--) {
170	>	lock.readLock().unlock();
171	>	assertEquals(i-1,lock.getReadHoldCount());
172		}
173		}
174
175	+
176		/**
177	<	* read-lockInterruptibly is interruptible
177	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testReadLockInterruptibly_Interrupted() {
180	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
204	<	lock.writeLock().lock();
205	<	Thread t = new Thread(new Runnable() {
206	<	public void run() {
207	<	try {
208	<	lock.readLock().lockInterruptibly();
209	<	threadShouldThrow();
210	<	} catch(InterruptedException success){}
211	<	}
212	<	});
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181		try {
182	<	t.start();
183	<	t.interrupt();
184	<	lock.writeLock().unlock();
217	<	t.join();
218	<	} catch(Exception e){
219	<	unexpectedException();
220	<	}
221	<	}
222	<
223	<	/**
224	<	* timed read-trylock is interruptible
225	<	*/
226	<	public void testReadTryLock_Interrupted() {
227	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
228	<	lock.writeLock().lock();
229	<	Thread t = new Thread(new Runnable() {
230	<	public void run() {
231	<	try {
232	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
233	<	threadShouldThrow();
234	<	} catch(InterruptedException success){}
235	<	}
236	<	});
237	<	try {
238	<	t.start();
239	<	t.interrupt();
240	<	t.join();
241	<	} catch(Exception e){
242	<	unexpectedException();
243	<	}
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185		}
186
246	–
247	–	/**
248	–	* write-trylock fails if locked
249	–	*/
250	–	public void testWriteTryLockWhenLocked() {
251	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
252	–	lock.writeLock().lock();
253	–	Thread t = new Thread(new Runnable() {
254	–	public void run() {
255	–	threadAssertFalse(lock.writeLock().tryLock());
256	–	}
257	–	});
258	–	try {
259	–	t.start();
260	–	t.join();
261	–	lock.writeLock().unlock();
262	–	} catch(Exception e){
263	–	unexpectedException();
264	–	}
265	–	}
187
188		/**
189	<	* read-trylock fails if locked
189	>	* write-lockInterruptibly is interruptible
190		*/
191	<	public void testReadTryLockWhenLocked() {
192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	<	lock.writeLock().lock();
194	<	Thread t = new Thread(new Runnable() {
195	<	public void run() {
196	<	threadAssertFalse(lock.readLock().tryLock());
197	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.join();
202	<	lock.writeLock().unlock();
203	<	} catch(Exception e){
204	<	unexpectedException();
205	<	}
206	<	}
191	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
192	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	>	lock.writeLock().lock();
194	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
195	>	public void realRun() throws InterruptedException {
196	>	lock.writeLock().lockInterruptibly();
197	>	lock.writeLock().unlock();
198	>	lock.writeLock().lockInterruptibly();
199	>	lock.writeLock().unlock();
200	>	}});
201	>
202	>	Thread.sleep(SHORT_DELAY_MS);
203	>	t.interrupt();
204	>	Thread.sleep(SHORT_DELAY_MS);
205	>	lock.writeLock().unlock();
206	>	t.join();
207	>	}
208
209		/**
210	<	* Multiple threads can hold a read lock when not write-locked
210	>	* timed write-tryLock is interruptible
211	>	*/
212	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	>	lock.writeLock().lock();
215	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
216	>	public void realRun() throws InterruptedException {
217	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
218	>	}});
219	>
220	>	Thread.sleep(SHORT_DELAY_MS);
221	>	t.interrupt();
222	>	lock.writeLock().unlock();
223	>	t.join();
224	>	}
225	>
226	>	/**
227	>	* read-lockInterruptibly is interruptible
228		*/
229	<	public void testMultipleReadLocks() {
230	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	<	lock.readLock().lock();
232	<	Thread t = new Thread(new Runnable() {
233	<	public void run() {
234	<	threadAssertTrue(lock.readLock().tryLock());
235	<	lock.readLock().unlock();
236	<	}
237	<	});
238	<	try {
239	<	t.start();
240	<	t.join();
241	<	lock.readLock().unlock();
242	<	} catch(Exception e){
304	<	unexpectedException();
305	<	}
306	<	}
229	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
230	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	>	lock.writeLock().lock();
232	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
233	>	public void realRun() throws InterruptedException {
234	>	lock.readLock().lockInterruptibly();
235	>	}});
236	>
237	>	Thread.sleep(SHORT_DELAY_MS);
238	>	t.interrupt();
239	>	Thread.sleep(SHORT_DELAY_MS);
240	>	lock.writeLock().unlock();
241	>	t.join();
242	>	}
243
244		/**
245	<	* A writelock succeeds after reading threads unlock
245	>	* timed read-tryLock is interruptible
246		*/
247	<	public void testWriteAfterMultipleReadLocks() {
248	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	<	lock.readLock().lock();
250	<	Thread t1 = new Thread(new Runnable() {
251	<	public void run() {
252	<	lock.readLock().lock();
253	<	lock.readLock().unlock();
254	<	}
255	<	});
256	<	Thread t2 = new Thread(new Runnable() {
257	<	public void run() {
258	<	lock.writeLock().lock();
259	<	lock.writeLock().unlock();
324	<	}
325	<	});
326	<
327	<	try {
328	<	t1.start();
329	<	t2.start();
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	lock.readLock().unlock();
332	<	t1.join(MEDIUM_DELAY_MS);
333	<	t2.join(MEDIUM_DELAY_MS);
334	<	assertTrue(!t1.isAlive());
335	<	assertTrue(!t2.isAlive());
336	<
337	<	} catch(Exception e){
338	<	unexpectedException();
339	<	}
340	<	}
247	>	public void testReadTryLock_Interrupted() throws InterruptedException {
248	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	>	lock.writeLock().lock();
250	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
251	>	public void realRun() throws InterruptedException {
252	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
253	>	}});
254	>
255	>	Thread.sleep(SHORT_DELAY_MS);
256	>	t.interrupt();
257	>	t.join();
258	>	}
259	>
260
261		/**
262	<	* Readlocks succeed after a writing thread unlocks
262	>	* write-tryLock fails if locked
263		*/
264	<	public void testReadAfterWriteLock() {
265	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	<	lock.writeLock().lock();
267	<	Thread t1 = new Thread(new Runnable() {
268	<	public void run() {
269	<	lock.readLock().lock();
270	<	lock.readLock().unlock();
352	<	}
353	<	});
354	<	Thread t2 = new Thread(new Runnable() {
355	<	public void run() {
356	<	lock.readLock().lock();
357	<	lock.readLock().unlock();
358	<	}
359	<	});
360	<
361	<	try {
362	<	t1.start();
363	<	t2.start();
364	<	Thread.sleep(SHORT_DELAY_MS);
365	<	lock.writeLock().unlock();
366	<	t1.join(MEDIUM_DELAY_MS);
367	<	t2.join(MEDIUM_DELAY_MS);
368	<	assertTrue(!t1.isAlive());
369	<	assertTrue(!t2.isAlive());
370	<
371	<	} catch(Exception e){
372	<	unexpectedException();
373	<	}
374	<	}
264	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
265	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	>	lock.writeLock().lock();
267	>	Thread t = newStartedThread(new CheckedRunnable() {
268	>	public void realRun() {
269	>	assertFalse(lock.writeLock().tryLock());
270	>	}});
271
272	+	t.join();
273	+	lock.writeLock().unlock();
274	+	}
275
276		/**
277	<	* Read trylock succeeds if readlocked but not writelocked
278	<	*/
279	<	public void testTryLockWhenReadLocked() {
280	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
281	<	lock.readLock().lock();
282	<	Thread t = new Thread(new Runnable() {
283	<	public void run() {
284	<	threadAssertTrue(lock.readLock().tryLock());
285	<	lock.readLock().unlock();
387	<	}
388	<	});
389	<	try {
390	<	t.start();
391	<	t.join();
392	<	lock.readLock().unlock();
393	<	} catch(Exception e){
394	<	unexpectedException();
395	<	}
396	<	}
277	>	* read-tryLock fails if locked
278	>	*/
279	>	public void testReadTryLockWhenLocked() throws InterruptedException {
280	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
281	>	lock.writeLock().lock();
282	>	Thread t = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() {
284	>	assertFalse(lock.readLock().tryLock());
285	>	}});
286
287	<
287	>	t.join();
288	>	lock.writeLock().unlock();
289	>	}
290
291		/**
292	<	* write trylock fails when readlocked
292	>	* Multiple threads can hold a read lock when not write-locked
293		*/
294	<	public void testWriteTryLockWhenReadLocked() {
295	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	<	lock.readLock().lock();
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	threadAssertFalse(lock.writeLock().tryLock());
300	<	}
301	<	});
411	<	try {
412	<	t.start();
413	<	t.join();
414	<	lock.readLock().unlock();
415	<	} catch(Exception e){
416	<	unexpectedException();
417	<	}
418	<	}
294	>	public void testMultipleReadLocks() throws InterruptedException {
295	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	>	lock.readLock().lock();
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() {
299	>	assertTrue(lock.readLock().tryLock());
300	>	lock.readLock().unlock();
301	>	}});
302
303	<
303	>	t.join();
304	>	lock.readLock().unlock();
305	>	}
306
307		/**
308	<	* write timed trylock times out if locked
309	<	*/
310	<	public void testWriteTryLock_Timeout() {
311	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
312	<	lock.writeLock().lock();
313	<	Thread t = new Thread(new Runnable() {
314	<	public void run() {
315	<	try {
316	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
317	<	} catch (Exception ex) {
318	<	threadUnexpectedException();
319	<	}
320	<	}
321	<	});
322	<	try {
323	<	t.start();
324	<	t.join();
325	<	lock.writeLock().unlock();
326	<	} catch(Exception e){
327	<	unexpectedException();
328	<	}
329	<	}
308	>	* A writelock succeeds after reading threads unlock
309	>	*/
310	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
311	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
312	>	lock.readLock().lock();
313	>	Thread t1 = newStartedThread(new CheckedRunnable() {
314	>	public void realRun() {
315	>	lock.readLock().lock();
316	>	lock.readLock().unlock();
317	>	}});
318	>	Thread t2 = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	lock.writeLock().lock();
321	>	lock.writeLock().unlock();
322	>	}});
323	>
324	>	Thread.sleep(SHORT_DELAY_MS);
325	>	lock.readLock().unlock();
326	>	t1.join(MEDIUM_DELAY_MS);
327	>	t2.join(MEDIUM_DELAY_MS);
328	>	assertTrue(!t1.isAlive());
329	>	assertTrue(!t2.isAlive());
330	>	}
331
332		/**
333	<	* read timed trylock times out if write-locked
333	>	* Readlocks succeed after a writing thread unlocks
334		*/
335	<	public void testReadTryLock_Timeout() {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	try {
341	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
342	<	} catch (Exception ex) {
343	<	threadUnexpectedException();
344	<	}
345	<	}
346	<	});
347	<	try {
348	<	t.start();
349	<	t.join();
350	<	lock.writeLock().unlock();
351	<	} catch(Exception e){
352	<	unexpectedException();
353	<	}
354	<	}
335	>	public void testReadAfterWriteLock() throws InterruptedException {
336	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	lock.writeLock().lock();
338	>	Thread t1 = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	lock.readLock().lock();
341	>	lock.readLock().unlock();
342	>	}});
343	>	Thread t2 = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() {
345	>	lock.readLock().lock();
346	>	lock.readLock().unlock();
347	>	}});
348	>
349	>	Thread.sleep(SHORT_DELAY_MS);
350	>	lock.writeLock().unlock();
351	>	t1.join(MEDIUM_DELAY_MS);
352	>	t2.join(MEDIUM_DELAY_MS);
353	>	assertTrue(!t1.isAlive());
354	>	assertTrue(!t2.isAlive());
355	>	}
356	>
357	>	/**
358	>	* Read trylock succeeds if write locked by current thread
359	>	*/
360	>	public void testReadHoldingWriteLock() {
361	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
362	>	lock.writeLock().lock();
363	>	assertTrue(lock.readLock().tryLock());
364	>	lock.readLock().unlock();
365	>	lock.writeLock().unlock();
366	>	}
367	>
368	>	/**
369	>	* Read lock succeeds if write locked by current thread even if
370	>	* other threads are waiting for readlock
371	>	*/
372	>	public void testReadHoldingWriteLock2() throws InterruptedException {
373	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
374	>	lock.writeLock().lock();
375	>	Thread t1 = newStartedThread(new CheckedRunnable() {
376	>	public void realRun() {
377	>	lock.readLock().lock();
378	>	lock.readLock().unlock();
379	>	}});
380	>	Thread t2 = newStartedThread(new CheckedRunnable() {
381	>	public void realRun() {
382	>	lock.readLock().lock();
383	>	lock.readLock().unlock();
384	>	}});
385	>
386	>	lock.readLock().lock();
387	>	lock.readLock().unlock();
388	>	Thread.sleep(SHORT_DELAY_MS);
389	>	lock.readLock().lock();
390	>	lock.readLock().unlock();
391	>	lock.writeLock().unlock();
392	>	t1.join(MEDIUM_DELAY_MS);
393	>	t2.join(MEDIUM_DELAY_MS);
394	>	assertTrue(!t1.isAlive());
395	>	assertTrue(!t2.isAlive());
396	>	}
397	>
398	>	/**
399	>	* Read lock succeeds if write locked by current thread even if
400	>	* other threads are waiting for writelock
401	>	*/
402	>	public void testReadHoldingWriteLock3() throws InterruptedException {
403	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	>	lock.writeLock().lock();
405	>	Thread t1 = newStartedThread(new CheckedRunnable() {
406	>	public void realRun() {
407	>	lock.writeLock().lock();
408	>	lock.writeLock().unlock();
409	>	}});
410	>	Thread t2 = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	lock.writeLock().lock();
413	>	lock.writeLock().unlock();
414	>	}});
415	>
416	>	lock.readLock().lock();
417	>	lock.readLock().unlock();
418	>	Thread.sleep(SHORT_DELAY_MS);
419	>	lock.readLock().lock();
420	>	lock.readLock().unlock();
421	>	lock.writeLock().unlock();
422	>	t1.join(MEDIUM_DELAY_MS);
423	>	t2.join(MEDIUM_DELAY_MS);
424	>	assertTrue(!t1.isAlive());
425	>	assertTrue(!t2.isAlive());
426	>	}
427	>
428	>
429	>	/**
430	>	* Write lock succeeds if write locked by current thread even if
431	>	* other threads are waiting for writelock
432	>	*/
433	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
434	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
435	>	lock.writeLock().lock();
436	>	Thread t1 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.writeLock().lock();
439	>	lock.writeLock().unlock();
440	>	}});
441	>	Thread t2 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446	>
447	>	lock.writeLock().lock();
448	>	lock.writeLock().unlock();
449	>	Thread.sleep(SHORT_DELAY_MS);
450	>	lock.writeLock().lock();
451	>	lock.writeLock().unlock();
452	>	lock.writeLock().unlock();
453	>	t1.join(MEDIUM_DELAY_MS);
454	>	t2.join(MEDIUM_DELAY_MS);
455	>	assertTrue(!t1.isAlive());
456	>	assertTrue(!t2.isAlive());
457	>	}
458	>
459	>
460	>	/**
461	>	* Fair Read trylock succeeds if write locked by current thread
462	>	*/
463	>	public void testReadHoldingWriteLockFair() {
464	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
465	>	lock.writeLock().lock();
466	>	assertTrue(lock.readLock().tryLock());
467	>	lock.readLock().unlock();
468	>	lock.writeLock().unlock();
469	>	}
470	>
471	>	/**
472	>	* Fair Read lock succeeds if write locked by current thread even if
473	>	* other threads are waiting for readlock
474	>	*/
475	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
476	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
477	>	lock.writeLock().lock();
478	>	Thread t1 = newStartedThread(new CheckedRunnable() {
479	>	public void realRun() {
480	>	lock.readLock().lock();
481	>	lock.readLock().unlock();
482	>	}});
483	>	Thread t2 = newStartedThread(new CheckedRunnable() {
484	>	public void realRun() {
485	>	lock.readLock().lock();
486	>	lock.readLock().unlock();
487	>	}});
488	>
489	>	lock.readLock().lock();
490	>	lock.readLock().unlock();
491	>	Thread.sleep(SHORT_DELAY_MS);
492	>	lock.readLock().lock();
493	>	lock.readLock().unlock();
494	>	lock.writeLock().unlock();
495	>	t1.join(MEDIUM_DELAY_MS);
496	>	t2.join(MEDIUM_DELAY_MS);
497	>	assertTrue(!t1.isAlive());
498	>	assertTrue(!t2.isAlive());
499	>	}
500	>
501	>
502	>	/**
503	>	* Fair Read lock succeeds if write locked by current thread even if
504	>	* other threads are waiting for writelock
505	>	*/
506	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
507	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
508	>	lock.writeLock().lock();
509	>	Thread t1 = newStartedThread(new CheckedRunnable() {
510	>	public void realRun() {
511	>	lock.writeLock().lock();
512	>	lock.writeLock().unlock();
513	>	}});
514	>	Thread t2 = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}});
519	>
520	>	lock.readLock().lock();
521	>	lock.readLock().unlock();
522	>	Thread.sleep(SHORT_DELAY_MS);
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	lock.writeLock().unlock();
526	>	t1.join(MEDIUM_DELAY_MS);
527	>	t2.join(MEDIUM_DELAY_MS);
528	>	assertTrue(!t1.isAlive());
529	>	assertTrue(!t2.isAlive());
530	>	}
531	>
532	>
533	>	/**
534	>	* Fair Write lock succeeds if write locked by current thread even if
535	>	* other threads are waiting for writelock
536	>	*/
537	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
538	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
539	>	lock.writeLock().lock();
540	>	Thread t1 = newStartedThread(new CheckedRunnable() {
541	>	public void realRun() {
542	>	lock.writeLock().lock();
543	>	lock.writeLock().unlock();
544	>	}});
545	>	Thread t2 = newStartedThread(new CheckedRunnable() {
546	>	public void realRun() {
547	>	lock.writeLock().lock();
548	>	lock.writeLock().unlock();
549	>	}});
550	>
551	>	Thread.sleep(SHORT_DELAY_MS);
552	>	assertTrue(lock.isWriteLockedByCurrentThread());
553	>	assertEquals(1, lock.getWriteHoldCount());
554	>	lock.writeLock().lock();
555	>	assertEquals(2, lock.getWriteHoldCount());
556	>	lock.writeLock().unlock();
557	>	lock.writeLock().lock();
558	>	lock.writeLock().unlock();
559	>	lock.writeLock().unlock();
560	>	t1.join(MEDIUM_DELAY_MS);
561	>	t2.join(MEDIUM_DELAY_MS);
562	>	assertTrue(!t1.isAlive());
563	>	assertTrue(!t2.isAlive());
564	>	}
565	>
566	>
567	>	/**
568	>	* Read tryLock succeeds if readlocked but not writelocked
569	>	*/
570	>	public void testTryLockWhenReadLocked() throws InterruptedException {
571	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
572	>	lock.readLock().lock();
573	>	Thread t = newStartedThread(new CheckedRunnable() {
574	>	public void realRun() {
575	>	assertTrue(lock.readLock().tryLock());
576	>	lock.readLock().unlock();
577	>	}});
578	>
579	>	t.join();
580	>	lock.readLock().unlock();
581	>	}
582	>
583	>	/**
584	>	* write tryLock fails when readlocked
585	>	*/
586	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
587	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	>	lock.readLock().lock();
589	>	Thread t = newStartedThread(new CheckedRunnable() {
590	>	public void realRun() {
591	>	assertFalse(lock.writeLock().tryLock());
592	>	}});
593	>
594	>	t.join();
595	>	lock.readLock().unlock();
596	>	}
597	>
598	>
599	>	/**
600	>	* Fair Read tryLock succeeds if readlocked but not writelocked
601	>	*/
602	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
603	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
604	>	lock.readLock().lock();
605	>	Thread t = newStartedThread(new CheckedRunnable() {
606	>	public void realRun() {
607	>	assertTrue(lock.readLock().tryLock());
608	>	lock.readLock().unlock();
609	>	}});
610	>
611	>	t.join();
612	>	lock.readLock().unlock();
613	>	}
614	>
615	>
616	>
617	>	/**
618	>	* Fair write tryLock fails when readlocked
619	>	*/
620	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
621	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
622	>	lock.readLock().lock();
623	>	Thread t = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	assertFalse(lock.writeLock().tryLock());
626	>	}});
627	>
628	>	t.join();
629	>	lock.readLock().unlock();
630	>	}
631	>
632	>
633	>
634	>	/**
635	>	* write timed tryLock times out if locked
636	>	*/
637	>	public void testWriteTryLock_Timeout() throws InterruptedException {
638	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
639	>	lock.writeLock().lock();
640	>	Thread t = newStartedThread(new CheckedRunnable() {
641	>	public void realRun() throws InterruptedException {
642	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
643	>	}});
644	>
645	>	t.join();
646	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
647	>	lock.writeLock().unlock();
648	>	}
649	>
650	>	/**
651	>	* read timed tryLock times out if write-locked
652	>	*/
653	>	public void testReadTryLock_Timeout() throws InterruptedException {
654	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
655	>	lock.writeLock().lock();
656	>	Thread t = newStartedThread(new CheckedRunnable() {
657	>	public void realRun() throws InterruptedException {
658	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
659	>	}});
660	>
661	>	t.join();
662	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
663	>	lock.writeLock().unlock();
664	>	}
665
666
667		/**
668		* write lockInterruptibly succeeds if lock free else is interruptible
669		*/
670	<	public void testWriteLockInterruptibly() {
671	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
672	<	try {
673	<	lock.writeLock().lockInterruptibly();
674	<	} catch(Exception e) {
675	<	unexpectedException();
676	<	}
677	<	Thread t = new Thread(new Runnable() {
678	<	public void run() {
679	<	try {
680	<	lock.writeLock().lockInterruptibly();
681	<	threadShouldThrow();
682	<	}
487	<	catch(InterruptedException success) {
488	<	}
489	<	}
490	<	});
491	<	try {
492	<	t.start();
493	<	t.interrupt();
494	<	t.join();
495	<	lock.writeLock().unlock();
496	<	} catch(Exception e){
497	<	unexpectedException();
498	<	}
670	>	public void testWriteLockInterruptibly() throws InterruptedException {
671	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
672	>	lock.writeLock().lockInterruptibly();
673	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	lock.writeLock().lockInterruptibly();
676	>	}});
677	>
678	>	Thread.sleep(SHORT_DELAY_MS);
679	>	t.interrupt();
680	>	Thread.sleep(SHORT_DELAY_MS);
681	>	t.join();
682	>	lock.writeLock().unlock();
683		}
684
685		/**
686	<	*  read lockInterruptibly succeeds if lock free else is interruptible
687	<	*/
688	<	public void testReadLockInterruptibly() {
689	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	<	try {
691	<	lock.writeLock().lockInterruptibly();
692	<	} catch(Exception e) {
693	<	unexpectedException();
694	<	}
695	<	Thread t = new Thread(new Runnable() {
696	<	public void run() {
697	<	try {
698	<	lock.readLock().lockInterruptibly();
699	<	threadShouldThrow();
516	<	}
517	<	catch(InterruptedException success) {
518	<	}
519	<	}
520	<	});
521	<	try {
522	<	t.start();
523	<	t.interrupt();
524	<	t.join();
525	<	lock.writeLock().unlock();
526	<	} catch(Exception e){
527	<	unexpectedException();
528	<	}
686	>	* read lockInterruptibly succeeds if lock free else is interruptible
687	>	*/
688	>	public void testReadLockInterruptibly() throws InterruptedException {
689	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	>	lock.writeLock().lockInterruptibly();
691	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
692	>	public void realRun() throws InterruptedException {
693	>	lock.readLock().lockInterruptibly();
694	>	}});
695	>
696	>	Thread.sleep(SHORT_DELAY_MS);
697	>	t.interrupt();
698	>	t.join();
699	>	lock.writeLock().unlock();
700		}
701
702		/**
703		* Calling await without holding lock throws IllegalMonitorStateException
704		*/
705	<	public void testAwait_IllegalMonitor() {
706	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	public void testAwait_IllegalMonitor() throws InterruptedException {
706	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
707		final Condition c = lock.writeLock().newCondition();
708		try {
709		c.await();
710		shouldThrow();
711	<	}
541	<	catch (IllegalMonitorStateException success) {
542	<	}
543	<	catch (Exception ex) {
544	<	shouldThrow();
545	<	}
711	>	} catch (IllegalMonitorStateException success) {}
712		}
713
714		/**
715		* Calling signal without holding lock throws IllegalMonitorStateException
716		*/
717		public void testSignal_IllegalMonitor() {
718	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
718	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
719		final Condition c = lock.writeLock().newCondition();
720		try {
721		c.signal();
722		shouldThrow();
723	<	}
558	<	catch (IllegalMonitorStateException success) {
559	<	}
560	<	catch (Exception ex) {
561	<	unexpectedException();
562	<	}
723	>	} catch (IllegalMonitorStateException success) {}
724		}
725
726		/**
727		* awaitNanos without a signal times out
728		*/
729	<	public void testAwaitNanos_Timeout() {
730	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
729	>	public void testAwaitNanos_Timeout() throws InterruptedException {
730	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
731		final Condition c = lock.writeLock().newCondition();
732	<	try {
733	<	lock.writeLock().lock();
734	<	long t = c.awaitNanos(100);
735	<	assertTrue(t <= 0);
736	<	lock.writeLock().unlock();
576	<	}
577	<	catch (Exception ex) {
578	<	unexpectedException();
579	<	}
732	>
733	>	lock.writeLock().lock();
734	>	long t = c.awaitNanos(100);
735	>	assertTrue(t <= 0);
736	>	lock.writeLock().unlock();
737		}
738
739
740		/**
741	<	*  timed await without a signal times out
741	>	* timed await without a signal times out
742		*/
743	<	public void testAwait_Timeout() {
744	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	>	public void testAwait_Timeout() throws InterruptedException {
744	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
745		final Condition c = lock.writeLock().newCondition();
746	<	try {
747	<	lock.writeLock().lock();
748	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
592	<	lock.writeLock().unlock();
593	<	}
594	<	catch (Exception ex) {
595	<	unexpectedException();
596	<	}
746	>	lock.writeLock().lock();
747	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
748	>	lock.writeLock().unlock();
749		}
750
751		/**
752		* awaitUntil without a signal times out
753		*/
754	<	public void testAwaitUntil_Timeout() {
755	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	public void testAwaitUntil_Timeout() throws InterruptedException {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
756		final Condition c = lock.writeLock().newCondition();
757	<	try {
758	<	lock.writeLock().lock();
759	<	java.util.Date d = new java.util.Date();
760	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
609	<	lock.writeLock().unlock();
610	<	}
611	<	catch (Exception ex) {
612	<	unexpectedException();
613	<	}
757	>	lock.writeLock().lock();
758	>	java.util.Date d = new java.util.Date();
759	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
760	>	lock.writeLock().unlock();
761		}
762
763		/**
764		* await returns when signalled
765		*/
766	<	public void testAwait() {
767	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
766	>	public void testAwait() throws InterruptedException {
767	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
768		final Condition c = lock.writeLock().newCondition();
769	<	Thread t = new Thread(new Runnable() {
770	<	public void run() {
771	<	try {
772	<	lock.writeLock().lock();
773	<	c.await();
774	<	lock.writeLock().unlock();
775	<	}
776	<	catch(InterruptedException e) {
777	<	threadUnexpectedException();
778	<	}
779	<	}
780	<	});
769	>	Thread t = newStartedThread(new CheckedRunnable() {
770	>	public void realRun() throws InterruptedException {
771	>	lock.writeLock().lock();
772	>	c.await();
773	>	lock.writeLock().unlock();
774	>	}});
775	>
776	>	Thread.sleep(SHORT_DELAY_MS);
777	>	lock.writeLock().lock();
778	>	c.signal();
779	>	lock.writeLock().unlock();
780	>	t.join(SHORT_DELAY_MS);
781	>	assertFalse(t.isAlive());
782	>	}
783	>
784	>	/** A helper class for uninterruptible wait tests */
785	>	class UninterruptableThread extends Thread {
786	>	private Lock lock;
787	>	private Condition c;
788	>
789	>	public volatile boolean canAwake = false;
790	>	public volatile boolean interrupted = false;
791	>	public volatile boolean lockStarted = false;
792	>
793	>	public UninterruptableThread(Lock lock, Condition c) {
794	>	this.lock = lock;
795	>	this.c = c;
796	>	}
797	>
798	>	public synchronized void run() {
799	>	lock.lock();
800	>	lockStarted = true;
801	>
802	>	while (!canAwake) {
803	>	c.awaitUninterruptibly();
804	>	}
805
806	<	try {
807	<	t.start();
637	<	Thread.sleep(SHORT_DELAY_MS);
638	<	lock.writeLock().lock();
639	<	c.signal();
640	<	lock.writeLock().unlock();
641	<	t.join(SHORT_DELAY_MS);
642	<	assertFalse(t.isAlive());
643	<	}
644	<	catch (Exception ex) {
645	<	unexpectedException();
806	>	interrupted = isInterrupted();
807	>	lock.unlock();
808		}
809		}
810
811		/**
812		* awaitUninterruptibly doesn't abort on interrupt
813		*/
814	<	public void testAwaitUninterruptibly() {
815	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
814	>	public void testAwaitUninterruptibly() throws InterruptedException {
815	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
816		final Condition c = lock.writeLock().newCondition();
817	<	Thread t = new Thread(new Runnable() {
818	<	public void run() {
819	<	lock.writeLock().lock();
658	<	c.awaitUninterruptibly();
659	<	lock.writeLock().unlock();
660	<	}
661	<	});
817	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
818	>
819	>	thread.start();
820
821	+	while (!thread.lockStarted) {
822	+	Thread.sleep(100);
823	+	}
824	+
825	+	lock.writeLock().lock();
826		try {
827	<	t.start();
828	<	Thread.sleep(SHORT_DELAY_MS);
666	<	t.interrupt();
667	<	lock.writeLock().lock();
827	>	thread.interrupt();
828	>	thread.canAwake = true;
829		c.signal();
830	+	} finally {
831		lock.writeLock().unlock();
670	–	assert(t.isInterrupted());
671	–	t.join(SHORT_DELAY_MS);
672	–	assertFalse(t.isAlive());
673	–	}
674	–	catch (Exception ex) {
675	–	unexpectedException();
832		}
833	+
834	+	thread.join();
835	+	assertTrue(thread.interrupted);
836	+	assertFalse(thread.isAlive());
837		}
838
839		/**
840		* await is interruptible
841		*/
842	<	public void testAwait_Interrupt() {
843	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
842	>	public void testAwait_Interrupt() throws InterruptedException {
843	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844		final Condition c = lock.writeLock().newCondition();
845	<	Thread t = new Thread(new Runnable() {
846	<	public void run() {
847	<	try {
848	<	lock.writeLock().lock();
849	<	c.await();
850	<	lock.writeLock().unlock();
851	<	threadShouldThrow();
852	<	}
853	<	catch(InterruptedException success) {
854	<	}
855	<	}
696	<	});
697	<
698	<	try {
699	<	t.start();
700	<	Thread.sleep(SHORT_DELAY_MS);
701	<	t.interrupt();
702	<	t.join(SHORT_DELAY_MS);
703	<	assertFalse(t.isAlive());
704	<	}
705	<	catch (Exception ex) {
706	<	unexpectedException();
707	<	}
845	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
846	>	public void realRun() throws InterruptedException {
847	>	lock.writeLock().lock();
848	>	c.await();
849	>	lock.writeLock().unlock();
850	>	}});
851	>
852	>	Thread.sleep(SHORT_DELAY_MS);
853	>	t.interrupt();
854	>	t.join(SHORT_DELAY_MS);
855	>	assertFalse(t.isAlive());
856		}
857
858		/**
859		* awaitNanos is interruptible
860		*/
861	<	public void testAwaitNanos_Interrupt() {
862	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
861	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
862	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863		final Condition c = lock.writeLock().newCondition();
864	<	Thread t = new Thread(new Runnable() {
865	<	public void run() {
866	<	try {
867	<	lock.writeLock().lock();
868	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
869	<	lock.writeLock().unlock();
870	<	threadShouldThrow();
871	<	}
872	<	catch(InterruptedException success) {
873	<	}
874	<	}
727	<	});
728	<
729	<	try {
730	<	t.start();
731	<	Thread.sleep(SHORT_DELAY_MS);
732	<	t.interrupt();
733	<	t.join(SHORT_DELAY_MS);
734	<	assertFalse(t.isAlive());
735	<	}
736	<	catch (Exception ex) {
737	<	unexpectedException();
738	<	}
864	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
865	>	public void realRun() throws InterruptedException {
866	>	lock.writeLock().lock();
867	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
868	>	lock.writeLock().unlock();
869	>	}});
870	>
871	>	Thread.sleep(SHORT_DELAY_MS);
872	>	t.interrupt();
873	>	t.join(SHORT_DELAY_MS);
874	>	assertFalse(t.isAlive());
875		}
876
877		/**
878		* awaitUntil is interruptible
879		*/
880	<	public void testAwaitUntil_Interrupt() {
881	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
880	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
881	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
882		final Condition c = lock.writeLock().newCondition();
883	<	Thread t = new Thread(new Runnable() {
884	<	public void run() {
885	<	try {
886	<	lock.writeLock().lock();
887	<	java.util.Date d = new java.util.Date();
888	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
889	<	lock.writeLock().unlock();
890	<	threadShouldThrow();
891	<	}
892	<	catch(InterruptedException success) {
893	<	}
894	<	}
759	<	});
760	<
761	<	try {
762	<	t.start();
763	<	Thread.sleep(SHORT_DELAY_MS);
764	<	t.interrupt();
765	<	t.join(SHORT_DELAY_MS);
766	<	assertFalse(t.isAlive());
767	<	}
768	<	catch (Exception ex) {
769	<	unexpectedException();
770	<	}
883	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
884	>	public void realRun() throws InterruptedException {
885	>	lock.writeLock().lock();
886	>	java.util.Date d = new java.util.Date();
887	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
888	>	lock.writeLock().unlock();
889	>	}});
890	>
891	>	Thread.sleep(SHORT_DELAY_MS);
892	>	t.interrupt();
893	>	t.join(SHORT_DELAY_MS);
894	>	assertFalse(t.isAlive());
895		}
896
897		/**
898		* signalAll wakes up all threads
899		*/
900	<	public void testSignalAll() {
901	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
900	>	public void testSignalAll() throws InterruptedException {
901	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902		final Condition c = lock.writeLock().newCondition();
903	<	Thread t1 = new Thread(new Runnable() {
904	<	public void run() {
905	<	try {
906	<	lock.writeLock().lock();
907	<	c.await();
908	<	lock.writeLock().unlock();
909	<	}
910	<	catch(InterruptedException e) {
911	<	threadUnexpectedException();
912	<	}
913	<	}
914	<	});
915	<
916	<	Thread t2 = new Thread(new Runnable() {
917	<	public void run() {
918	<	try {
919	<	lock.writeLock().lock();
920	<	c.await();
921	<	lock.writeLock().unlock();
922	<	}
923	<	catch(InterruptedException e) {
924	<	threadUnexpectedException();
801	<	}
802	<	}
803	<	});
804	<
805	<	try {
806	<	t1.start();
807	<	t2.start();
808	<	Thread.sleep(SHORT_DELAY_MS);
809	<	lock.writeLock().lock();
810	<	c.signalAll();
811	<	lock.writeLock().unlock();
812	<	t1.join(SHORT_DELAY_MS);
813	<	t2.join(SHORT_DELAY_MS);
814	<	assertFalse(t1.isAlive());
815	<	assertFalse(t2.isAlive());
816	<	}
817	<	catch (Exception ex) {
818	<	unexpectedException();
819	<	}
903	>	Thread t1 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() throws InterruptedException {
905	>	lock.writeLock().lock();
906	>	c.await();
907	>	lock.writeLock().unlock();
908	>	}});
909	>
910	>	Thread t2 = newStartedThread(new CheckedRunnable() {
911	>	public void realRun() throws InterruptedException {
912	>	lock.writeLock().lock();
913	>	c.await();
914	>	lock.writeLock().unlock();
915	>	}});
916	>
917	>	Thread.sleep(SHORT_DELAY_MS);
918	>	lock.writeLock().lock();
919	>	c.signalAll();
920	>	lock.writeLock().unlock();
921	>	t1.join(SHORT_DELAY_MS);
922	>	t2.join(SHORT_DELAY_MS);
923	>	assertFalse(t1.isAlive());
924	>	assertFalse(t2.isAlive());
925		}
926
927		/**
928		* A serialized lock deserializes as unlocked
929		*/
930	<	public void testSerialization() {
930	>	public void testSerialization() throws Exception {
931		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
932		l.readLock().lock();
933		l.readLock().unlock();
934
935	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
936	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
937	+	out.writeObject(l);
938	+	out.close();
939	+
940	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
941	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
942	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
943	+	r.readLock().lock();
944	+	r.readLock().unlock();
945	+	}
946	+
947	+	/**
948	+	* hasQueuedThreads reports whether there are waiting threads
949	+	*/
950	+	public void testhasQueuedThreads() throws InterruptedException {
951	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
952	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
953	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
954	+	assertFalse(lock.hasQueuedThreads());
955	+	lock.writeLock().lock();
956	+	t1.start();
957	+	Thread.sleep(SHORT_DELAY_MS);
958	+	assertTrue(lock.hasQueuedThreads());
959	+	t2.start();
960	+	Thread.sleep(SHORT_DELAY_MS);
961	+	assertTrue(lock.hasQueuedThreads());
962	+	t1.interrupt();
963	+	Thread.sleep(SHORT_DELAY_MS);
964	+	assertTrue(lock.hasQueuedThreads());
965	+	lock.writeLock().unlock();
966	+	Thread.sleep(SHORT_DELAY_MS);
967	+	assertFalse(lock.hasQueuedThreads());
968	+	t1.join();
969	+	t2.join();
970	+	}
971	+
972	+	/**
973	+	* hasQueuedThread(null) throws NPE
974	+	*/
975	+	public void testHasQueuedThreadNPE() {
976	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
977		try {
978	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
979	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
980	<	out.writeObject(l);
834	<	out.close();
835	<
836	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
837	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
838	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
839	<	r.readLock().lock();
840	<	r.readLock().unlock();
841	<	} catch(Exception e){
842	<	e.printStackTrace();
843	<	unexpectedException();
844	<	}
978	>	sync.hasQueuedThread(null);
979	>	shouldThrow();
980	>	} catch (NullPointerException success) {}
981		}
982
983		/**
984	+	* hasQueuedThread reports whether a thread is queued.
985	+	*/
986	+	public void testHasQueuedThread() throws InterruptedException {
987	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
988	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
989	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
990	+	assertFalse(sync.hasQueuedThread(t1));
991	+	assertFalse(sync.hasQueuedThread(t2));
992	+	sync.writeLock().lock();
993	+	t1.start();
994	+	Thread.sleep(SHORT_DELAY_MS);
995	+	assertTrue(sync.hasQueuedThread(t1));
996	+	t2.start();
997	+	Thread.sleep(SHORT_DELAY_MS);
998	+	assertTrue(sync.hasQueuedThread(t1));
999	+	assertTrue(sync.hasQueuedThread(t2));
1000	+	t1.interrupt();
1001	+	Thread.sleep(SHORT_DELAY_MS);
1002	+	assertFalse(sync.hasQueuedThread(t1));
1003	+	assertTrue(sync.hasQueuedThread(t2));
1004	+	sync.writeLock().unlock();
1005	+	Thread.sleep(SHORT_DELAY_MS);
1006	+	assertFalse(sync.hasQueuedThread(t1));
1007	+	Thread.sleep(SHORT_DELAY_MS);
1008	+	assertFalse(sync.hasQueuedThread(t2));
1009	+	t1.join();
1010	+	t2.join();
1011	+	}
1012	+
1013	+
1014	+	/**
1015		* getQueueLength reports number of waiting threads
1016		*/
1017	<	public void testGetQueueLength() {
1018	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1017	>	public void testGetQueueLength() throws InterruptedException {
1018	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1019		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1020		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1021	<	try {
1022	<	assertEquals(0, lock.getQueueLength());
1023	<	lock.writeLock().lock();
1024	<	t1.start();
1025	<	Thread.sleep(SHORT_DELAY_MS);
1026	<	assertEquals(1, lock.getQueueLength());
1027	<	t2.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	assertEquals(2, lock.getQueueLength());
1030	<	t1.interrupt();
1031	<	Thread.sleep(SHORT_DELAY_MS);
1032	<	assertEquals(1, lock.getQueueLength());
1033	<	lock.writeLock().unlock();
1034	<	Thread.sleep(SHORT_DELAY_MS);
1035	<	assertEquals(0, lock.getQueueLength());
1036	<	t1.join();
1037	<	t2.join();
871	<	} catch(Exception e){
872	<	unexpectedException();
873	<	}
874	<	}
1021	>	assertEquals(0, lock.getQueueLength());
1022	>	lock.writeLock().lock();
1023	>	t1.start();
1024	>	Thread.sleep(SHORT_DELAY_MS);
1025	>	assertEquals(1, lock.getQueueLength());
1026	>	t2.start();
1027	>	Thread.sleep(SHORT_DELAY_MS);
1028	>	assertEquals(2, lock.getQueueLength());
1029	>	t1.interrupt();
1030	>	Thread.sleep(SHORT_DELAY_MS);
1031	>	assertEquals(1, lock.getQueueLength());
1032	>	lock.writeLock().unlock();
1033	>	Thread.sleep(SHORT_DELAY_MS);
1034	>	assertEquals(0, lock.getQueueLength());
1035	>	t1.join();
1036	>	t2.join();
1037	>	}
1038
1039		/**
1040		* getQueuedThreads includes waiting threads
1041		*/
1042	<	public void testGetQueuedThreads() {
1043	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042	>	public void testGetQueuedThreads() throws InterruptedException {
1043	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1044		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1045		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1046	+	assertTrue(lock.getQueuedThreads().isEmpty());
1047	+	lock.writeLock().lock();
1048	+	assertTrue(lock.getQueuedThreads().isEmpty());
1049	+	t1.start();
1050	+	Thread.sleep(SHORT_DELAY_MS);
1051	+	assertTrue(lock.getQueuedThreads().contains(t1));
1052	+	t2.start();
1053	+	Thread.sleep(SHORT_DELAY_MS);
1054	+	assertTrue(lock.getQueuedThreads().contains(t1));
1055	+	assertTrue(lock.getQueuedThreads().contains(t2));
1056	+	t1.interrupt();
1057	+	Thread.sleep(SHORT_DELAY_MS);
1058	+	assertFalse(lock.getQueuedThreads().contains(t1));
1059	+	assertTrue(lock.getQueuedThreads().contains(t2));
1060	+	lock.writeLock().unlock();
1061	+	Thread.sleep(SHORT_DELAY_MS);
1062	+	assertTrue(lock.getQueuedThreads().isEmpty());
1063	+	t1.join();
1064	+	t2.join();
1065	+	}
1066	+
1067	+	/**
1068	+	* hasWaiters throws NPE if null
1069	+	*/
1070	+	public void testHasWaitersNPE() {
1071	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1072		try {
1073	<	assertTrue(lock.getQueuedThreads().isEmpty());
1074	<	lock.writeLock().lock();
1075	<	assertTrue(lock.getQueuedThreads().isEmpty());
1076	<	t1.start();
888	<	Thread.sleep(SHORT_DELAY_MS);
889	<	assertTrue(lock.getQueuedThreads().contains(t1));
890	<	t2.start();
891	<	Thread.sleep(SHORT_DELAY_MS);
892	<	assertTrue(lock.getQueuedThreads().contains(t1));
893	<	assertTrue(lock.getQueuedThreads().contains(t2));
894	<	t1.interrupt();
895	<	Thread.sleep(SHORT_DELAY_MS);
896	<	assertFalse(lock.getQueuedThreads().contains(t1));
897	<	assertTrue(lock.getQueuedThreads().contains(t2));
898	<	lock.writeLock().unlock();
899	<	Thread.sleep(SHORT_DELAY_MS);
900	<	assertTrue(lock.getQueuedThreads().isEmpty());
901	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1073	>	lock.hasWaiters(null);
1074	>	shouldThrow();
1075	>	} catch (NullPointerException success) {}
1076	>	}
1077
1078		/**
1079	<	* hasWaiters returns true when a thread is waiting, else false
1079	>	* getWaitQueueLength throws NPE if null
1080		*/
1081	<	public void testHasWaiters() {
1082	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1083	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1084	<	Thread t = new Thread(new Runnable() {
1085	<	public void run() {
1086	<	try {
1087	<	lock.writeLock().lock();
1088	<	threadAssertFalse(c.hasWaiters());
919	<	threadAssertEquals(0, c.getWaitQueueLength());
920	<	c.await();
921	<	lock.writeLock().unlock();
922	<	}
923	<	catch(InterruptedException e) {
924	<	threadUnexpectedException();
925	<	}
926	<	}
927	<	});
1081	>	public void testGetWaitQueueLengthNPE() {
1082	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1083	>	try {
1084	>	lock.getWaitQueueLength(null);
1085	>	shouldThrow();
1086	>	} catch (NullPointerException success) {}
1087	>	}
1088	>
1089
1090	+	/**
1091	+	* getWaitingThreads throws NPE if null
1092	+	*/
1093	+	public void testGetWaitingThreadsNPE() {
1094	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1095		try {
1096	<	t.start();
1097	<	Thread.sleep(SHORT_DELAY_MS);
1098	<	lock.writeLock().lock();
1099	<	assertTrue(c.hasWaiters());
1100	<	assertEquals(1, c.getWaitQueueLength());
1101	<	c.signal();
1102	<	lock.writeLock().unlock();
1103	<	Thread.sleep(SHORT_DELAY_MS);
1104	<	lock.writeLock().lock();
1105	<	assertFalse(c.hasWaiters());
1106	<	assertEquals(0, c.getWaitQueueLength());
1107	<	lock.writeLock().unlock();
1108	<	t.join(SHORT_DELAY_MS);
1109	<	assertFalse(t.isAlive());
1110	<	}
1111	<	catch (Exception ex) {
1112	<	unexpectedException();
1113	<	}
1096	>	lock.getWaitingThreads(null);
1097	>	shouldThrow();
1098	>	} catch (NullPointerException success) {}
1099	>	}
1100	>
1101	>	/**
1102	>	* hasWaiters throws IAE if not owned
1103	>	*/
1104	>	public void testHasWaitersIAE() {
1105	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1106	>	final Condition c = lock.writeLock().newCondition();
1107	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1108	>	try {
1109	>	lock2.hasWaiters(c);
1110	>	shouldThrow();
1111	>	} catch (IllegalArgumentException success) {}
1112	>	}
1113	>
1114	>	/**
1115	>	* hasWaiters throws IMSE if not locked
1116	>	*/
1117	>	public void testHasWaitersIMSE() {
1118	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1119	>	final Condition c = lock.writeLock().newCondition();
1120	>	try {
1121	>	lock.hasWaiters(c);
1122	>	shouldThrow();
1123	>	} catch (IllegalMonitorStateException success) {}
1124	>	}
1125	>
1126	>
1127	>	/**
1128	>	* getWaitQueueLength throws IAE if not owned
1129	>	*/
1130	>	public void testGetWaitQueueLengthIAE() {
1131	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132	>	final Condition c = lock.writeLock().newCondition();
1133	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1134	>	try {
1135	>	lock2.getWaitQueueLength(c);
1136	>	shouldThrow();
1137	>	} catch (IllegalArgumentException success) {}
1138	>	}
1139	>
1140	>	/**
1141	>	* getWaitQueueLength throws IMSE if not locked
1142	>	*/
1143	>	public void testGetWaitQueueLengthIMSE() {
1144	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1145	>	final Condition c = lock.writeLock().newCondition();
1146	>	try {
1147	>	lock.getWaitQueueLength(c);
1148	>	shouldThrow();
1149	>	} catch (IllegalMonitorStateException success) {}
1150	>	}
1151	>
1152	>
1153	>	/**
1154	>	* getWaitingThreads throws IAE if not owned
1155	>	*/
1156	>	public void testGetWaitingThreadsIAE() {
1157	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1158	>	final Condition c = lock.writeLock().newCondition();
1159	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1160	>	try {
1161	>	lock2.getWaitingThreads(c);
1162	>	shouldThrow();
1163	>	} catch (IllegalArgumentException success) {}
1164	>	}
1165	>
1166	>	/**
1167	>	* getWaitingThreads throws IMSE if not locked
1168	>	*/
1169	>	public void testGetWaitingThreadsIMSE() {
1170	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1171	>	final Condition c = lock.writeLock().newCondition();
1172	>	try {
1173	>	lock.getWaitingThreads(c);
1174	>	shouldThrow();
1175	>	} catch (IllegalMonitorStateException success) {}
1176	>	}
1177	>
1178	>
1179	>	/**
1180	>	* hasWaiters returns true when a thread is waiting, else false
1181	>	*/
1182	>	public void testHasWaiters() throws InterruptedException {
1183	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1184	>	final Condition c = lock.writeLock().newCondition();
1185	>	Thread t = newStartedThread(new CheckedRunnable() {
1186	>	public void realRun() throws InterruptedException {
1187	>	lock.writeLock().lock();
1188	>	assertFalse(lock.hasWaiters(c));
1189	>	assertEquals(0, lock.getWaitQueueLength(c));
1190	>	c.await();
1191	>	lock.writeLock().unlock();
1192	>	}});
1193	>
1194	>	Thread.sleep(SHORT_DELAY_MS);
1195	>	lock.writeLock().lock();
1196	>	assertTrue(lock.hasWaiters(c));
1197	>	assertEquals(1, lock.getWaitQueueLength(c));
1198	>	c.signal();
1199	>	lock.writeLock().unlock();
1200	>	Thread.sleep(SHORT_DELAY_MS);
1201	>	lock.writeLock().lock();
1202	>	assertFalse(lock.hasWaiters(c));
1203	>	assertEquals(0, lock.getWaitQueueLength(c));
1204	>	lock.writeLock().unlock();
1205	>	t.join(SHORT_DELAY_MS);
1206	>	assertFalse(t.isAlive());
1207		}
1208
1209		/**
1210		* getWaitQueueLength returns number of waiting threads
1211		*/
1212	<	public void testGetWaitQueueLength() {
1213	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1214	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1215	<	Thread t1 = new Thread(new Runnable() {
1216	<	public void run() {
1217	<	try {
1218	<	lock.writeLock().lock();
1219	<	threadAssertFalse(c.hasWaiters());
1220	<	threadAssertEquals(0, c.getWaitQueueLength());
1221	<	c.await();
1222	<	lock.writeLock().unlock();
1223	<	}
1224	<	catch(InterruptedException e) {
1225	<	threadUnexpectedException();
1226	<	}
1227	<	}
1228	<	});
1229	<
1230	<	Thread t2 = new Thread(new Runnable() {
1231	<	public void run() {
1232	<	try {
1233	<	lock.writeLock().lock();
1234	<	threadAssertTrue(c.hasWaiters());
1235	<	threadAssertEquals(1, c.getWaitQueueLength());
1236	<	c.await();
978	<	lock.writeLock().unlock();
979	<	}
980	<	catch(InterruptedException e) {
981	<	threadUnexpectedException();
982	<	}
983	<	}
984	<	});
985	<
986	<	try {
987	<	t1.start();
988	<	Thread.sleep(SHORT_DELAY_MS);
989	<	t2.start();
990	<	Thread.sleep(SHORT_DELAY_MS);
991	<	lock.writeLock().lock();
992	<	assertTrue(c.hasWaiters());
993	<	assertEquals(2, c.getWaitQueueLength());
994	<	c.signalAll();
995	<	lock.writeLock().unlock();
996	<	Thread.sleep(SHORT_DELAY_MS);
997	<	lock.writeLock().lock();
998	<	assertFalse(c.hasWaiters());
999	<	assertEquals(0, c.getWaitQueueLength());
1000	<	lock.writeLock().unlock();
1001	<	t1.join(SHORT_DELAY_MS);
1002	<	t2.join(SHORT_DELAY_MS);
1003	<	assertFalse(t1.isAlive());
1004	<	assertFalse(t2.isAlive());
1005	<	}
1006	<	catch (Exception ex) {
1007	<	unexpectedException();
1008	<	}
1212	>	public void testGetWaitQueueLength() throws InterruptedException {
1213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1214	>	final Condition c = lock.writeLock().newCondition();
1215	>	Thread t = newStartedThread(new CheckedRunnable() {
1216	>	public void realRun() throws InterruptedException {
1217	>	lock.writeLock().lock();
1218	>	assertFalse(lock.hasWaiters(c));
1219	>	assertEquals(0, lock.getWaitQueueLength(c));
1220	>	c.await();
1221	>	lock.writeLock().unlock();
1222	>	}});
1223	>
1224	>	Thread.sleep(SHORT_DELAY_MS);
1225	>	lock.writeLock().lock();
1226	>	assertTrue(lock.hasWaiters(c));
1227	>	assertEquals(1, lock.getWaitQueueLength(c));
1228	>	c.signal();
1229	>	lock.writeLock().unlock();
1230	>	Thread.sleep(SHORT_DELAY_MS);
1231	>	lock.writeLock().lock();
1232	>	assertFalse(lock.hasWaiters(c));
1233	>	assertEquals(0, lock.getWaitQueueLength(c));
1234	>	lock.writeLock().unlock();
1235	>	t.join(SHORT_DELAY_MS);
1236	>	assertFalse(t.isAlive());
1237		}
1238	+
1239	+
1240	+	/**
1241	+	* getWaitingThreads returns only and all waiting threads
1242	+	*/
1243	+	public void testGetWaitingThreads() throws InterruptedException {
1244	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1245	+	final Condition c = lock.writeLock().newCondition();
1246	+	Thread t1 = new Thread(new CheckedRunnable() {
1247	+	public void realRun() throws InterruptedException {
1248	+	lock.writeLock().lock();
1249	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1250	+	c.await();
1251	+	lock.writeLock().unlock();
1252	+	}});
1253	+
1254	+	Thread t2 = new Thread(new CheckedRunnable() {
1255	+	public void realRun() throws InterruptedException {
1256	+	lock.writeLock().lock();
1257	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1258	+	c.await();
1259	+	lock.writeLock().unlock();
1260	+	}});
1261	+
1262	+	lock.writeLock().lock();
1263	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1264	+	lock.writeLock().unlock();
1265	+	t1.start();
1266	+	Thread.sleep(SHORT_DELAY_MS);
1267	+	t2.start();
1268	+	Thread.sleep(SHORT_DELAY_MS);
1269	+	lock.writeLock().lock();
1270	+	assertTrue(lock.hasWaiters(c));
1271	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1272	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1273	+	c.signalAll();
1274	+	lock.writeLock().unlock();
1275	+	Thread.sleep(SHORT_DELAY_MS);
1276	+	lock.writeLock().lock();
1277	+	assertFalse(lock.hasWaiters(c));
1278	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1279	+	lock.writeLock().unlock();
1280	+	t1.join(SHORT_DELAY_MS);
1281	+	t2.join(SHORT_DELAY_MS);
1282	+	assertFalse(t1.isAlive());
1283	+	assertFalse(t2.isAlive());
1284	+	}
1285	+
1286	+	/**
1287	+	* toString indicates current lock state
1288	+	*/
1289	+	public void testToString() {
1290	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1291	+	String us = lock.toString();
1292	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1293	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1294	+	lock.writeLock().lock();
1295	+	String ws = lock.toString();
1296	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1297	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1298	+	lock.writeLock().unlock();
1299	+	lock.readLock().lock();
1300	+	lock.readLock().lock();
1301	+	String rs = lock.toString();
1302	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1303	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1304	+	}
1305	+
1306	+	/**
1307	+	* readLock.toString indicates current lock state
1308	+	*/
1309	+	public void testReadLockToString() {
1310	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1311	+	String us = lock.readLock().toString();
1312	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1313	+	lock.readLock().lock();
1314	+	lock.readLock().lock();
1315	+	String rs = lock.readLock().toString();
1316	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1317	+	}
1318	+
1319	+	/**
1320	+	* writeLock.toString indicates current lock state
1321	+	*/
1322	+	public void testWriteLockToString() {
1323	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1324	+	String us = lock.writeLock().toString();
1325	+	assertTrue(us.indexOf("Unlocked") >= 0);
1326	+	lock.writeLock().lock();
1327	+	String ls = lock.writeLock().toString();
1328	+	assertTrue(ls.indexOf("Locked") >= 0);
1329	+	}
1330	+
1331		}

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