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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.6 by dl, Mon Nov 10 13:32:08 2003 UTC vs.
Revision 1.38 by jsr166, Sat Nov 21 21:59:50 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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.
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 {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 37 | 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 {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 53 | 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 WriterConditionObject newCondition() {
57	<	return new PublicCondition(this);
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
62	–
63	–	static class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
64	–	PublicCondition(PublicReentrantReadWriteLock l) { super(l); }
65	–	public Collection<Thread> getWaitingThreads() {
66	–	return super.getWaitingThreads();
67	–	}
68	–	}
69	–
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.getReadLocks());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
68	>	assertEquals(0, rl.getReadLockCount());
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
72	<	assertEquals(0, r2.getReadLocks());
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	<	assertEquals(0, rl.getReadLocks());
87	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
88	>	assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertEquals(0, rl.getReadLocks());
92	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	>	assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
96		assertFalse(rl.isWriteLockedByCurrentThread());
97	<	assertEquals(1, rl.getReadLocks());
97	>	assertEquals(1, rl.getReadLockCount());
98		rl.readLock().unlock();
99		assertFalse(rl.isWriteLocked());
100		assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertEquals(0, rl.getReadLocks());
101	>	assertEquals(0, rl.getReadLockCount());
102		}
103
104
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	<	assertEquals(0, rl.getReadLocks());
113	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
114	>	assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	<	assertEquals(0, rl.getReadLocks());
118	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
119	>	assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
122		assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(1, rl.getReadLocks());
123	>	assertEquals(1, rl.getReadLockCount());
124		rl.readLock().unlock();
125		assertFalse(rl.isWriteLocked());
126		assertFalse(rl.isWriteLockedByCurrentThread());
127	<	assertEquals(0, rl.getReadLocks());
127	>	assertEquals(0, rl.getReadLockCount());
128		}
129
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());
141	<	}
142	<	for(int i = SIZE; i > 0; i--) {
143	<	lock.writeLock().unlock();
144	<	assertEquals(i-1,lock.getWriteHoldCount());
145	<	}
146	<	}
147	<
148	<
149	<	/**
150	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
151	<	*/
152	<	public void testUnlock_IllegalMonitorStateException() {
153	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
154	<	try {
155	<	rl.writeLock().unlock();
156	<	shouldThrow();
157	<	} catch(IllegalMonitorStateException success){}
158	<	}
159	<
160	<
161	<	/**
162	<	* write-lockInterruptibly is interruptible
163	<	*/
164	<	public void testWriteLockInterruptibly_Interrupted() {
165	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
166	<	lock.writeLock().lock();
167	<	Thread t = new Thread(new Runnable() {
168	<	public void run() {
169	<	try {
170	<	lock.writeLock().lockInterruptibly();
171	<	threadShouldThrow();
172	<	} catch(InterruptedException success){}
173	<	}
174	<	});
175	<	try {
176	<	t.start();
177	<	t.interrupt();
178	<	lock.writeLock().unlock();
179	<	t.join();
180	<	} catch(Exception e){
181	<	unexpectedException();
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	<	}
184	<
185	<	/**
186	<	* timed write-trylock is interruptible
187	<	*/
188	<	public void testWriteTryLock_Interrupted() {
189	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
190	<	lock.writeLock().lock();
191	<	Thread t = new Thread(new Runnable() {
192	<	public void run() {
193	<	try {
194	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
195	<	threadShouldThrow();
196	<	} catch(InterruptedException success){}
197	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.interrupt();
139	>	for (int i = SIZE; i > 0; i--) {
140		lock.writeLock().unlock();
141	<	t.join();
204	<	} catch(Exception e){
205	<	unexpectedException();
141	>	assertEquals(i-1,lock.getWriteHoldCount());
142		}
143		}
144
145		/**
146	<	* read-lockInterruptibly is interruptible
146	>	* WriteLock.getHoldCount returns number of recursive holds
147		*/
148	<	public void testReadLockInterruptibly_Interrupted() {
149	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	lock.writeLock().lock();
151	<	Thread t = new Thread(new Runnable() {
152	<	public void run() {
153	<	try {
154	<	lock.readLock().lockInterruptibly();
219	<	threadShouldThrow();
220	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
225	<	t.interrupt();
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	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
156	>	assertEquals(i-1,lock.writeLock().getHoldCount());
157		}
158	<	}
158	>	}
159
160		/**
161	<	* timed read-trylock is interruptible
161	>	* getReadHoldCount returns number of recursive holds
162		*/
163	<	public void testReadTryLock_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.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
170	<	threadShouldThrow();
171	<	} catch(InterruptedException success){}
245	<	}
246	<	});
247	<	try {
248	<	t.start();
249	<	t.interrupt();
250	<	t.join();
251	<	} catch(Exception e){
252	<	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	<
175	>
176		/**
177	<	* write-trylock fails if locked
177	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testWriteTryLockWhenLocked() {
180	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
262	<	lock.writeLock().lock();
263	<	Thread t = new Thread(new Runnable() {
264	<	public void run() {
265	<	threadAssertFalse(lock.writeLock().tryLock());
266	<	}
267	<	});
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181		try {
182	<	t.start();
183	<	t.join();
184	<	lock.writeLock().unlock();
185	<	} catch(Exception e){
186	<	unexpectedException();
274	<	}
275	<	}
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185	>	}
186	>
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	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
194	>	public void realRun() throws InterruptedException {
195	>	lock.writeLock().lockInterruptibly();
196	>	lock.writeLock().unlock();
197	>	lock.writeLock().lockInterruptibly();
198	>	lock.writeLock().unlock();
199	>	}});
200	>
201	>	lock.writeLock().lock();
202	>	t.start();
203	>	Thread.sleep(SHORT_DELAY_MS);
204	>	t.interrupt();
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	lock.writeLock().unlock();
207	>	t.join();
208	>	}
209
210		/**
211	<	* Multiple threads can hold a read lock when not write-locked
212	<	*/
213	<	public void testMultipleReadLocks() {
214	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	<	lock.readLock().lock();
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	threadAssertTrue(lock.readLock().tryLock());
219	<	lock.readLock().unlock();
220	<	}
221	<	});
222	<	try {
223	<	t.start();
224	<	t.join();
225	<	lock.readLock().unlock();
226	<	} catch(Exception e){
314	<	unexpectedException();
315	<	}
316	<	}
211	>	* timed write-tryLock is interruptible
212	>	*/
213	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
214	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
215	>	lock.writeLock().lock();
216	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
217	>	public void realRun() throws InterruptedException {
218	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
219	>	}});
220	>
221	>	t.start();
222	>	Thread.sleep(SHORT_DELAY_MS);
223	>	t.interrupt();
224	>	lock.writeLock().unlock();
225	>	t.join();
226	>	}
227
228		/**
229	<	* A writelock succeeds after reading threads unlock
229	>	* read-lockInterruptibly is interruptible
230		*/
231	<	public void testWriteAfterMultipleReadLocks() {
232	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	<	lock.readLock().lock();
234	<	Thread t1 = new Thread(new Runnable() {
235	<	public void run() {
236	<	lock.readLock().lock();
237	<	lock.readLock().unlock();
328	<	}
329	<	});
330	<	Thread t2 = new Thread(new Runnable() {
331	<	public void run() {
332	<	lock.writeLock().lock();
333	<	lock.writeLock().unlock();
334	<	}
335	<	});
231	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
232	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	lock.writeLock().lock();
234	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
235	>	public void realRun() throws InterruptedException {
236	>	lock.readLock().lockInterruptibly();
237	>	}});
238
239	<	try {
240	<	t1.start();
241	<	t2.start();
242	<	Thread.sleep(SHORT_DELAY_MS);
243	<	lock.readLock().unlock();
244	<	t1.join(MEDIUM_DELAY_MS);
245	<	t2.join(MEDIUM_DELAY_MS);
344	<	assertTrue(!t1.isAlive());
345	<	assertTrue(!t2.isAlive());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
239	>	t.start();
240	>	Thread.sleep(SHORT_DELAY_MS);
241	>	t.interrupt();
242	>	Thread.sleep(SHORT_DELAY_MS);
243	>	lock.writeLock().unlock();
244	>	t.join();
245	>	}
246
247		/**
248	<	* Readlocks succeed after a writing thread unlocks
248	>	* timed read-tryLock is interruptible
249		*/
250	<	public void testReadAfterWriteLock() {
251	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
252	<	lock.writeLock().lock();
253	<	Thread t1 = new Thread(new Runnable() {
254	<	public void run() {
255	<	lock.readLock().lock();
256	<	lock.readLock().unlock();
362	<	}
363	<	});
364	<	Thread t2 = new Thread(new Runnable() {
365	<	public void run() {
366	<	lock.readLock().lock();
367	<	lock.readLock().unlock();
368	<	}
369	<	});
250	>	public void testReadTryLock_Interrupted() throws InterruptedException {
251	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
252	>	lock.writeLock().lock();
253	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
254	>	public void realRun() throws InterruptedException {
255	>	lock.readLock().tryLock(1000,MILLISECONDS);
256	>	}});
257
258	<	try {
259	<	t1.start();
260	<	t2.start();
261	<	Thread.sleep(SHORT_DELAY_MS);
375	<	lock.writeLock().unlock();
376	<	t1.join(MEDIUM_DELAY_MS);
377	<	t2.join(MEDIUM_DELAY_MS);
378	<	assertTrue(!t1.isAlive());
379	<	assertTrue(!t2.isAlive());
380	<
381	<	} catch(Exception e){
382	<	unexpectedException();
383	<	}
384	<	}
258	>	t.start();
259	>	t.interrupt();
260	>	t.join();
261	>	}
262
263
264		/**
265	<	* Read trylock succeeds if readlocked but not writelocked
265	>	* write-tryLock fails if locked
266		*/
267	<	public void testTryLockWhenReadLocked() {
268	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
269	<	lock.readLock().lock();
270	<	Thread t = new Thread(new Runnable() {
271	<	public void run() {
272	<	threadAssertTrue(lock.readLock().tryLock());
273	<	lock.readLock().unlock();
397	<	}
398	<	});
399	<	try {
400	<	t.start();
401	<	t.join();
402	<	lock.readLock().unlock();
403	<	} catch(Exception e){
404	<	unexpectedException();
405	<	}
406	<	}
267	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
269	>	lock.writeLock().lock();
270	>	Thread t = new Thread(new CheckedRunnable() {
271	>	public void realRun() {
272	>	threadAssertFalse(lock.writeLock().tryLock());
273	>	}});
274
275	<
275	>	t.start();
276	>	t.join();
277	>	lock.writeLock().unlock();
278	>	}
279
280		/**
281	<	* write trylock fails when readlocked
281	>	* read-tryLock fails if locked
282		*/
283	<	public void testWriteTryLockWhenReadLocked() {
284	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	<	lock.readLock().lock();
286	<	Thread t = new Thread(new Runnable() {
287	<	public void run() {
288	<	threadAssertFalse(lock.writeLock().tryLock());
289	<	}
420	<	});
421	<	try {
422	<	t.start();
423	<	t.join();
424	<	lock.readLock().unlock();
425	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
283	>	public void testReadTryLockWhenLocked() throws InterruptedException {
284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	>	lock.writeLock().lock();
286	>	Thread t = new Thread(new CheckedRunnable() {
287	>	public void realRun() {
288	>	threadAssertFalse(lock.readLock().tryLock());
289	>	}});
290
291	<
291	>	t.start();
292	>	t.join();
293	>	lock.writeLock().unlock();
294	>	}
295
296		/**
297	<	* write timed trylock times out if locked
297	>	* Multiple threads can hold a read lock when not write-locked
298		*/
299	<	public void testWriteTryLock_Timeout() {
300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	<	lock.writeLock().lock();
302	<	Thread t = new Thread(new Runnable() {
303	<	public void run() {
304	<	try {
305	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
306	<	} catch (Exception ex) {
307	<	threadUnexpectedException();
308	<	}
309	<	}
310	<	});
311	<	try {
448	<	t.start();
449	<	t.join();
450	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
299	>	public void testMultipleReadLocks() throws InterruptedException {
300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	>	lock.readLock().lock();
302	>	Thread t = new Thread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	threadAssertTrue(lock.readLock().tryLock());
305	>	lock.readLock().unlock();
306	>	}});
307	>
308	>	t.start();
309	>	t.join();
310	>	lock.readLock().unlock();
311	>	}
312
313		/**
314	<	* read timed trylock times out if write-locked
314	>	* A writelock succeeds after reading threads unlock
315		*/
316	<	public void testReadTryLock_Timeout() {
317	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
318	<	lock.writeLock().lock();
319	<	Thread t = new Thread(new Runnable() {
320	<	public void run() {
321	<	try {
322	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
323	<	} catch (Exception ex) {
324	<	threadUnexpectedException();
325	<	}
326	<	}
327	<	});
328	<	try {
329	<	t.start();
330	<	t.join();
331	<	lock.writeLock().unlock();
332	<	} catch(Exception e){
333	<	unexpectedException();
334	<	}
335	<	}
316	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
317	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
318	>	lock.readLock().lock();
319	>	Thread t1 = new Thread(new CheckedRunnable() {
320	>	public void realRun() {
321	>	lock.readLock().lock();
322	>	lock.readLock().unlock();
323	>	}});
324	>	Thread t2 = new Thread(new CheckedRunnable() {
325	>	public void realRun() {
326	>	lock.writeLock().lock();
327	>	lock.writeLock().unlock();
328	>	}});
329	>
330	>	t1.start();
331	>	t2.start();
332	>	Thread.sleep(SHORT_DELAY_MS);
333	>	lock.readLock().unlock();
334	>	t1.join(MEDIUM_DELAY_MS);
335	>	t2.join(MEDIUM_DELAY_MS);
336	>	assertTrue(!t1.isAlive());
337	>	assertTrue(!t2.isAlive());
338	>	}
339	>
340	>	/**
341	>	* Readlocks succeed after a writing thread unlocks
342	>	*/
343	>	public void testReadAfterWriteLock() throws InterruptedException {
344	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
345	>	lock.writeLock().lock();
346	>	Thread t1 = new Thread(new CheckedRunnable() {
347	>	public void realRun() {
348	>	lock.readLock().lock();
349	>	lock.readLock().unlock();
350	>	}});
351	>	Thread t2 = new Thread(new CheckedRunnable() {
352	>	public void realRun() {
353	>	lock.readLock().lock();
354	>	lock.readLock().unlock();
355	>	}});
356	>
357	>	t1.start();
358	>	t2.start();
359	>	Thread.sleep(SHORT_DELAY_MS);
360	>	lock.writeLock().unlock();
361	>	t1.join(MEDIUM_DELAY_MS);
362	>	t2.join(MEDIUM_DELAY_MS);
363	>	assertTrue(!t1.isAlive());
364	>	assertTrue(!t2.isAlive());
365	>	}
366	>
367	>	/**
368	>	* Read trylock succeeds if write locked by current thread
369	>	*/
370	>	public void testReadHoldingWriteLock() {
371	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
372	>	lock.writeLock().lock();
373	>	assertTrue(lock.readLock().tryLock());
374	>	lock.readLock().unlock();
375	>	lock.writeLock().unlock();
376	>	}
377	>
378	>	/**
379	>	* Read lock succeeds if write locked by current thread even if
380	>	* other threads are waiting for readlock
381	>	*/
382	>	public void testReadHoldingWriteLock2() throws InterruptedException {
383	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
384	>	lock.writeLock().lock();
385	>	Thread t1 = new Thread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	lock.readLock().lock();
388	>	lock.readLock().unlock();
389	>	}});
390	>	Thread t2 = new Thread(new CheckedRunnable() {
391	>	public void realRun() {
392	>	lock.readLock().lock();
393	>	lock.readLock().unlock();
394	>	}});
395	>
396	>	t1.start();
397	>	t2.start();
398	>	lock.readLock().lock();
399	>	lock.readLock().unlock();
400	>	Thread.sleep(SHORT_DELAY_MS);
401	>	lock.readLock().lock();
402	>	lock.readLock().unlock();
403	>	lock.writeLock().unlock();
404	>	t1.join(MEDIUM_DELAY_MS);
405	>	t2.join(MEDIUM_DELAY_MS);
406	>	assertTrue(!t1.isAlive());
407	>	assertTrue(!t2.isAlive());
408	>	}
409	>
410	>	/**
411	>	*  Read lock succeeds if write locked by current thread even if
412	>	* other threads are waiting for writelock
413	>	*/
414	>	public void testReadHoldingWriteLock3() throws InterruptedException {
415	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
416	>	lock.writeLock().lock();
417	>	Thread t1 = new Thread(new CheckedRunnable() {
418	>	public void realRun() {
419	>	lock.writeLock().lock();
420	>	lock.writeLock().unlock();
421	>	}});
422	>	Thread t2 = new Thread(new CheckedRunnable() {
423	>	public void realRun() {
424	>	lock.writeLock().lock();
425	>	lock.writeLock().unlock();
426	>	}});
427	>
428	>	t1.start();
429	>	t2.start();
430	>	lock.readLock().lock();
431	>	lock.readLock().unlock();
432	>	Thread.sleep(SHORT_DELAY_MS);
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	lock.writeLock().unlock();
436	>	t1.join(MEDIUM_DELAY_MS);
437	>	t2.join(MEDIUM_DELAY_MS);
438	>	assertTrue(!t1.isAlive());
439	>	assertTrue(!t2.isAlive());
440	>	}
441	>
442	>
443	>	/**
444	>	*  Write lock succeeds if write locked by current thread even if
445	>	* other threads are waiting for writelock
446	>	*/
447	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
448	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
449	>	lock.writeLock().lock();
450	>	Thread t1 = new Thread(new CheckedRunnable() {
451	>	public void realRun() {
452	>	lock.writeLock().lock();
453	>	lock.writeLock().unlock();
454	>	}});
455	>	Thread t2 = new Thread(new CheckedRunnable() {
456	>	public void realRun() {
457	>	lock.writeLock().lock();
458	>	lock.writeLock().unlock();
459	>	}});
460	>
461	>	t1.start();
462	>	t2.start();
463	>	lock.writeLock().lock();
464	>	lock.writeLock().unlock();
465	>	Thread.sleep(SHORT_DELAY_MS);
466	>	lock.writeLock().lock();
467	>	lock.writeLock().unlock();
468	>	lock.writeLock().unlock();
469	>	t1.join(MEDIUM_DELAY_MS);
470	>	t2.join(MEDIUM_DELAY_MS);
471	>	assertTrue(!t1.isAlive());
472	>	assertTrue(!t2.isAlive());
473	>	}
474	>
475	>
476	>	/**
477	>	* Fair Read trylock succeeds if write locked by current thread
478	>	*/
479	>	public void testReadHoldingWriteLockFair() {
480	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
481	>	lock.writeLock().lock();
482	>	assertTrue(lock.readLock().tryLock());
483	>	lock.readLock().unlock();
484	>	lock.writeLock().unlock();
485	>	}
486	>
487	>	/**
488	>	* Fair Read lock succeeds if write locked by current thread even if
489	>	* other threads are waiting for readlock
490	>	*/
491	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
492	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
493	>	lock.writeLock().lock();
494	>	Thread t1 = new Thread(new CheckedRunnable() {
495	>	public void realRun() {
496	>	lock.readLock().lock();
497	>	lock.readLock().unlock();
498	>	}});
499	>	Thread t2 = new Thread(new CheckedRunnable() {
500	>	public void realRun() {
501	>	lock.readLock().lock();
502	>	lock.readLock().unlock();
503	>	}});
504	>
505	>	t1.start();
506	>	t2.start();
507	>	lock.readLock().lock();
508	>	lock.readLock().unlock();
509	>	Thread.sleep(SHORT_DELAY_MS);
510	>	lock.readLock().lock();
511	>	lock.readLock().unlock();
512	>	lock.writeLock().unlock();
513	>	t1.join(MEDIUM_DELAY_MS);
514	>	t2.join(MEDIUM_DELAY_MS);
515	>	assertTrue(!t1.isAlive());
516	>	assertTrue(!t2.isAlive());
517	>	}
518	>
519	>
520	>	/**
521	>	* Fair Read lock succeeds if write locked by current thread even if
522	>	* other threads are waiting for writelock
523	>	*/
524	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
525	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
526	>	lock.writeLock().lock();
527	>	Thread t1 = new Thread(new CheckedRunnable() {
528	>	public void realRun() {
529	>	lock.writeLock().lock();
530	>	lock.writeLock().unlock();
531	>	}});
532	>	Thread t2 = new Thread(new CheckedRunnable() {
533	>	public void realRun() {
534	>	lock.writeLock().lock();
535	>	lock.writeLock().unlock();
536	>	}});
537	>
538	>	t1.start();
539	>	t2.start();
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	Thread.sleep(SHORT_DELAY_MS);
543	>	lock.readLock().lock();
544	>	lock.readLock().unlock();
545	>	lock.writeLock().unlock();
546	>	t1.join(MEDIUM_DELAY_MS);
547	>	t2.join(MEDIUM_DELAY_MS);
548	>	assertTrue(!t1.isAlive());
549	>	assertTrue(!t2.isAlive());
550	>	}
551	>
552	>
553	>	/**
554	>	* Fair Write lock succeeds if write locked by current thread even if
555	>	* other threads are waiting for writelock
556	>	*/
557	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
558	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
559	>	lock.writeLock().lock();
560	>	Thread t1 = new Thread(new CheckedRunnable() {
561	>	public void realRun() {
562	>	lock.writeLock().lock();
563	>	lock.writeLock().unlock();
564	>	}});
565	>	Thread t2 = new Thread(new CheckedRunnable() {
566	>	public void realRun() {
567	>	lock.writeLock().lock();
568	>	lock.writeLock().unlock();
569	>	}});
570	>
571	>	t1.start();
572	>	t2.start();
573	>	Thread.sleep(SHORT_DELAY_MS);
574	>	assertTrue(lock.isWriteLockedByCurrentThread());
575	>	assertTrue(lock.getWriteHoldCount() == 1);
576	>	lock.writeLock().lock();
577	>	assertTrue(lock.getWriteHoldCount() == 2);
578	>	lock.writeLock().unlock();
579	>	lock.writeLock().lock();
580	>	lock.writeLock().unlock();
581	>	lock.writeLock().unlock();
582	>	t1.join(MEDIUM_DELAY_MS);
583	>	t2.join(MEDIUM_DELAY_MS);
584	>	assertTrue(!t1.isAlive());
585	>	assertTrue(!t2.isAlive());
586	>	}
587	>
588	>
589	>	/**
590	>	* Read tryLock succeeds if readlocked but not writelocked
591	>	*/
592	>	public void testTryLockWhenReadLocked() throws InterruptedException {
593	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
594	>	lock.readLock().lock();
595	>	Thread t = new Thread(new CheckedRunnable() {
596	>	public void realRun() {
597	>	threadAssertTrue(lock.readLock().tryLock());
598	>	lock.readLock().unlock();
599	>	}});
600	>
601	>	t.start();
602	>	t.join();
603	>	lock.readLock().unlock();
604	>	}
605	>
606	>
607	>
608	>	/**
609	>	* write tryLock fails when readlocked
610	>	*/
611	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
612	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
613	>	lock.readLock().lock();
614	>	Thread t = new Thread(new CheckedRunnable() {
615	>	public void realRun() {
616	>	threadAssertFalse(lock.writeLock().tryLock());
617	>	}});
618	>
619	>	t.start();
620	>	t.join();
621	>	lock.readLock().unlock();
622	>	}
623	>
624	>
625	>	/**
626	>	* Fair Read tryLock succeeds if readlocked but not writelocked
627	>	*/
628	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
629	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
630	>	lock.readLock().lock();
631	>	Thread t = new Thread(new CheckedRunnable() {
632	>	public void realRun() {
633	>	threadAssertTrue(lock.readLock().tryLock());
634	>	lock.readLock().unlock();
635	>	}});
636	>
637	>	t.start();
638	>	t.join();
639	>	lock.readLock().unlock();
640	>	}
641	>
642	>
643	>
644	>	/**
645	>	* Fair write tryLock fails when readlocked
646	>	*/
647	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
648	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
649	>	lock.readLock().lock();
650	>	Thread t = new Thread(new CheckedRunnable() {
651	>	public void realRun() {
652	>	threadAssertFalse(lock.writeLock().tryLock());
653	>	}});
654	>
655	>	t.start();
656	>	t.join();
657	>	lock.readLock().unlock();
658	>	}
659	>
660	>
661	>
662	>	/**
663	>	* write timed tryLock times out if locked
664	>	*/
665	>	public void testWriteTryLock_Timeout() throws InterruptedException {
666	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
667	>	lock.writeLock().lock();
668	>	Thread t = new Thread(new CheckedRunnable() {
669	>	public void realRun() throws InterruptedException {
670	>	threadAssertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
671	>	}});
672	>
673	>	t.start();
674	>	t.join();
675	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
676	>	lock.writeLock().unlock();
677	>	}
678	>
679	>	/**
680	>	* read timed tryLock times out if write-locked
681	>	*/
682	>	public void testReadTryLock_Timeout() throws InterruptedException {
683	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
684	>	lock.writeLock().lock();
685	>	Thread t = new Thread(new CheckedRunnable() {
686	>	public void realRun() throws InterruptedException {
687	>	threadAssertFalse(lock.readLock().tryLock(1, MILLISECONDS));
688	>	}});
689	>
690	>	t.start();
691	>	t.join();
692	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
693	>	lock.writeLock().unlock();
694	>	}
695
696
697		/**
698		* write lockInterruptibly succeeds if lock free else is interruptible
699		*/
700	<	public void testWriteLockInterruptibly() {
701	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
702	<	try {
703	<	lock.writeLock().lockInterruptibly();
704	<	} catch(Exception e) {
705	<	unexpectedException();
706	<	}
707	<	Thread t = new Thread(new Runnable() {
708	<	public void run() {
709	<	try {
710	<	lock.writeLock().lockInterruptibly();
711	<	threadShouldThrow();
712	<	}
713	<	catch(InterruptedException success) {
498	<	}
499	<	}
500	<	});
501	<	try {
502	<	t.start();
503	<	t.interrupt();
504	<	t.join();
505	<	lock.writeLock().unlock();
506	<	} catch(Exception e){
507	<	unexpectedException();
508	<	}
700	>	public void testWriteLockInterruptibly() throws InterruptedException {
701	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
702	>	lock.writeLock().lockInterruptibly();
703	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
704	>	public void realRun() throws InterruptedException {
705	>	lock.writeLock().lockInterruptibly();
706	>	}});
707	>
708	>	t.start();
709	>	Thread.sleep(SHORT_DELAY_MS);
710	>	t.interrupt();
711	>	Thread.sleep(SHORT_DELAY_MS);
712	>	t.join();
713	>	lock.writeLock().unlock();
714		}
715
716		/**
717		*  read lockInterruptibly succeeds if lock free else is interruptible
718		*/
719	<	public void testReadLockInterruptibly() {
720	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	<	try {
722	<	lock.writeLock().lockInterruptibly();
723	<	} catch(Exception e) {
724	<	unexpectedException();
725	<	}
726	<	Thread t = new Thread(new Runnable() {
727	<	public void run() {
728	<	try {
729	<	lock.readLock().lockInterruptibly();
730	<	threadShouldThrow();
731	<	}
527	<	catch(InterruptedException success) {
528	<	}
529	<	}
530	<	});
531	<	try {
532	<	t.start();
533	<	t.interrupt();
534	<	t.join();
535	<	lock.writeLock().unlock();
536	<	} catch(Exception e){
537	<	unexpectedException();
538	<	}
719	>	public void testReadLockInterruptibly() throws InterruptedException {
720	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721	>	lock.writeLock().lockInterruptibly();
722	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
723	>	public void realRun() throws InterruptedException {
724	>	lock.readLock().lockInterruptibly();
725	>	}});
726	>
727	>	t.start();
728	>	Thread.sleep(SHORT_DELAY_MS);
729	>	t.interrupt();
730	>	t.join();
731	>	lock.writeLock().unlock();
732		}
733
734		/**
735		* Calling await without holding lock throws IllegalMonitorStateException
736		*/
737	<	public void testAwait_IllegalMonitor() {
738	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
737	>	public void testAwait_IllegalMonitor() throws InterruptedException {
738	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
739		final Condition c = lock.writeLock().newCondition();
740		try {
741		c.await();
742		shouldThrow();
743	<	}
551	<	catch (IllegalMonitorStateException success) {
552	<	}
553	<	catch (Exception ex) {
554	<	shouldThrow();
555	<	}
743	>	} catch (IllegalMonitorStateException success) {}
744		}
745
746		/**
747		* Calling signal without holding lock throws IllegalMonitorStateException
748		*/
749		public void testSignal_IllegalMonitor() {
750	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
750	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
751		final Condition c = lock.writeLock().newCondition();
752		try {
753		c.signal();
754		shouldThrow();
755	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
755	>	} catch (IllegalMonitorStateException success) {}
756		}
757
758		/**
759		* awaitNanos without a signal times out
760		*/
761	<	public void testAwaitNanos_Timeout() {
762	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761	>	public void testAwaitNanos_Timeout() throws InterruptedException {
762	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
763		final Condition c = lock.writeLock().newCondition();
764	<	try {
765	<	lock.writeLock().lock();
766	<	long t = c.awaitNanos(100);
767	<	assertTrue(t <= 0);
768	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
764	>
765	>	lock.writeLock().lock();
766	>	long t = c.awaitNanos(100);
767	>	assertTrue(t <= 0);
768	>	lock.writeLock().unlock();
769		}
770
771
772		/**
773		*  timed await without a signal times out
774		*/
775	<	public void testAwait_Timeout() {
776	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
775	>	public void testAwait_Timeout() throws InterruptedException {
776	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
777		final Condition c = lock.writeLock().newCondition();
778	<	try {
779	<	lock.writeLock().lock();
780	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
602	<	lock.writeLock().unlock();
603	<	}
604	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
778	>	lock.writeLock().lock();
779	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
780	>	lock.writeLock().unlock();
781		}
782
783		/**
784		* awaitUntil without a signal times out
785		*/
786	<	public void testAwaitUntil_Timeout() {
787	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
786	>	public void testAwaitUntil_Timeout() throws InterruptedException {
787	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
788		final Condition c = lock.writeLock().newCondition();
789	<	try {
790	<	lock.writeLock().lock();
791	<	java.util.Date d = new java.util.Date();
792	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
789	>	lock.writeLock().lock();
790	>	java.util.Date d = new java.util.Date();
791	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
792	>	lock.writeLock().unlock();
793		}
794
795		/**
796		* await returns when signalled
797		*/
798	<	public void testAwait() {
799	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
798	>	public void testAwait() throws InterruptedException {
799	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
800		final Condition c = lock.writeLock().newCondition();
801	<	Thread t = new Thread(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	lock.writeLock().lock();
805	<	c.await();
806	<	lock.writeLock().unlock();
807	<	}
808	<	catch(InterruptedException e) {
809	<	threadUnexpectedException();
810	<	}
811	<	}
812	<	});
801	>	Thread t = new Thread(new CheckedRunnable() {
802	>	public void realRun() throws InterruptedException {
803	>	lock.writeLock().lock();
804	>	c.await();
805	>	lock.writeLock().unlock();
806	>	}});
807	>
808	>	t.start();
809	>	Thread.sleep(SHORT_DELAY_MS);
810	>	lock.writeLock().lock();
811	>	c.signal();
812	>	lock.writeLock().unlock();
813	>	t.join(SHORT_DELAY_MS);
814	>	assertFalse(t.isAlive());
815	>	}
816	>
817	>	/** A helper class for uninterruptible wait tests */
818	>	class UninterruptableThread extends Thread {
819	>	private Lock lock;
820	>	private Condition c;
821	>
822	>	public volatile boolean canAwake = false;
823	>	public volatile boolean interrupted = false;
824	>	public volatile boolean lockStarted = false;
825	>
826	>	public UninterruptableThread(Lock lock, Condition c) {
827	>	this.lock = lock;
828	>	this.c = c;
829	>	}
830	>
831	>	public synchronized void run() {
832	>	lock.lock();
833	>	lockStarted = true;
834
835	<	try {
836	<	t.start();
837	<	Thread.sleep(SHORT_DELAY_MS);
838	<	lock.writeLock().lock();
839	<	c.signal();
840	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
835	>	while (!canAwake) {
836	>	c.awaitUninterruptibly();
837	>	}
838	>
839	>	interrupted = isInterrupted();
840	>	lock.unlock();
841		}
842		}
843
844		/**
845		* awaitUninterruptibly doesn't abort on interrupt
846		*/
847	<	public void testAwaitUninterruptibly() {
848	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
847	>	public void testAwaitUninterruptibly() throws InterruptedException {
848	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
849		final Condition c = lock.writeLock().newCondition();
850	<	Thread t = new Thread(new Runnable() {
851	<	public void run() {
852	<	lock.writeLock().lock();
853	<	c.awaitUninterruptibly();
854	<	lock.writeLock().unlock();
855	<	}
856	<	});
850	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
851	>
852	>	thread.start();
853	>
854	>	while (!thread.lockStarted) {
855	>	Thread.sleep(100);
856	>	}
857
858	+	lock.writeLock().lock();
859		try {
860	<	t.start();
861	<	Thread.sleep(SHORT_DELAY_MS);
676	<	t.interrupt();
677	<	lock.writeLock().lock();
860	>	thread.interrupt();
861	>	thread.canAwake = true;
862		c.signal();
863	+	} finally {
864		lock.writeLock().unlock();
680	–	assert(t.isInterrupted());
681	–	t.join(SHORT_DELAY_MS);
682	–	assertFalse(t.isAlive());
683	–	}
684	–	catch (Exception ex) {
685	–	unexpectedException();
865		}
866	+
867	+	thread.join();
868	+	assertTrue(thread.interrupted);
869	+	assertFalse(thread.isAlive());
870		}
871
872		/**
873		* await is interruptible
874		*/
875	<	public void testAwait_Interrupt() {
876	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
875	>	public void testAwait_Interrupt() throws InterruptedException {
876	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
877		final Condition c = lock.writeLock().newCondition();
878	<	Thread t = new Thread(new Runnable() {
879	<	public void run() {
880	<	try {
881	<	lock.writeLock().lock();
882	<	c.await();
883	<	lock.writeLock().unlock();
884	<	threadShouldThrow();
885	<	}
886	<	catch(InterruptedException success) {
887	<	}
888	<	}
889	<	});
707	<
708	<	try {
709	<	t.start();
710	<	Thread.sleep(SHORT_DELAY_MS);
711	<	t.interrupt();
712	<	t.join(SHORT_DELAY_MS);
713	<	assertFalse(t.isAlive());
714	<	}
715	<	catch (Exception ex) {
716	<	unexpectedException();
717	<	}
878	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
879	>	public void realRun() throws InterruptedException {
880	>	lock.writeLock().lock();
881	>	c.await();
882	>	lock.writeLock().unlock();
883	>	}});
884	>
885	>	t.start();
886	>	Thread.sleep(SHORT_DELAY_MS);
887	>	t.interrupt();
888	>	t.join(SHORT_DELAY_MS);
889	>	assertFalse(t.isAlive());
890		}
891
892		/**
893		* awaitNanos is interruptible
894		*/
895	<	public void testAwaitNanos_Interrupt() {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
895	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
896	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch(InterruptedException success) {
907	<	}
908	<	}
909	<	});
738	<
739	<	try {
740	<	t.start();
741	<	Thread.sleep(SHORT_DELAY_MS);
742	<	t.interrupt();
743	<	t.join(SHORT_DELAY_MS);
744	<	assertFalse(t.isAlive());
745	<	}
746	<	catch (Exception ex) {
747	<	unexpectedException();
748	<	}
898	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
899	>	public void realRun() throws InterruptedException {
900	>	lock.writeLock().lock();
901	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
902	>	lock.writeLock().unlock();
903	>	}});
904	>
905	>	t.start();
906	>	Thread.sleep(SHORT_DELAY_MS);
907	>	t.interrupt();
908	>	t.join(SHORT_DELAY_MS);
909	>	assertFalse(t.isAlive());
910		}
911
912		/**
913		* awaitUntil is interruptible
914		*/
915	<	public void testAwaitUntil_Interrupt() {
916	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
915	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
916	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
917		final Condition c = lock.writeLock().newCondition();
918	<	Thread t = new Thread(new Runnable() {
919	<	public void run() {
920	<	try {
921	<	lock.writeLock().lock();
922	<	java.util.Date d = new java.util.Date();
923	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
924	<	lock.writeLock().unlock();
925	<	threadShouldThrow();
926	<	}
927	<	catch(InterruptedException success) {
928	<	}
929	<	}
930	<	});
770	<
771	<	try {
772	<	t.start();
773	<	Thread.sleep(SHORT_DELAY_MS);
774	<	t.interrupt();
775	<	t.join(SHORT_DELAY_MS);
776	<	assertFalse(t.isAlive());
777	<	}
778	<	catch (Exception ex) {
779	<	unexpectedException();
780	<	}
918	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
919	>	public void realRun() throws InterruptedException {
920	>	lock.writeLock().lock();
921	>	java.util.Date d = new java.util.Date();
922	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
923	>	lock.writeLock().unlock();
924	>	}});
925	>
926	>	t.start();
927	>	Thread.sleep(SHORT_DELAY_MS);
928	>	t.interrupt();
929	>	t.join(SHORT_DELAY_MS);
930	>	assertFalse(t.isAlive());
931		}
932
933		/**
934		* signalAll wakes up all threads
935		*/
936	<	public void testSignalAll() {
937	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
936	>	public void testSignalAll() throws InterruptedException {
937	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938		final Condition c = lock.writeLock().newCondition();
939	<	Thread t1 = new Thread(new Runnable() {
940	<	public void run() {
941	<	try {
942	<	lock.writeLock().lock();
943	<	c.await();
944	<	lock.writeLock().unlock();
945	<	}
946	<	catch(InterruptedException e) {
947	<	threadUnexpectedException();
948	<	}
949	<	}
950	<	});
951	<
952	<	Thread t2 = new Thread(new Runnable() {
953	<	public void run() {
954	<	try {
955	<	lock.writeLock().lock();
956	<	c.await();
957	<	lock.writeLock().unlock();
958	<	}
959	<	catch(InterruptedException e) {
960	<	threadUnexpectedException();
961	<	}
962	<	}
813	<	});
814	<
815	<	try {
816	<	t1.start();
817	<	t2.start();
818	<	Thread.sleep(SHORT_DELAY_MS);
819	<	lock.writeLock().lock();
820	<	c.signalAll();
821	<	lock.writeLock().unlock();
822	<	t1.join(SHORT_DELAY_MS);
823	<	t2.join(SHORT_DELAY_MS);
824	<	assertFalse(t1.isAlive());
825	<	assertFalse(t2.isAlive());
826	<	}
827	<	catch (Exception ex) {
828	<	unexpectedException();
829	<	}
939	>	Thread t1 = new Thread(new CheckedRunnable() {
940	>	public void realRun() throws InterruptedException {
941	>	lock.writeLock().lock();
942	>	c.await();
943	>	lock.writeLock().unlock();
944	>	}});
945	>
946	>	Thread t2 = new Thread(new CheckedRunnable() {
947	>	public void realRun() throws InterruptedException {
948	>	lock.writeLock().lock();
949	>	c.await();
950	>	lock.writeLock().unlock();
951	>	}});
952	>
953	>	t1.start();
954	>	t2.start();
955	>	Thread.sleep(SHORT_DELAY_MS);
956	>	lock.writeLock().lock();
957	>	c.signalAll();
958	>	lock.writeLock().unlock();
959	>	t1.join(SHORT_DELAY_MS);
960	>	t2.join(SHORT_DELAY_MS);
961	>	assertFalse(t1.isAlive());
962	>	assertFalse(t2.isAlive());
963		}
964
965		/**
966		* A serialized lock deserializes as unlocked
967		*/
968	<	public void testSerialization() {
968	>	public void testSerialization() throws Exception {
969		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
970		l.readLock().lock();
971		l.readLock().unlock();
972
973	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
974	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
975	+	out.writeObject(l);
976	+	out.close();
977	+
978	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
979	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
980	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
981	+	r.readLock().lock();
982	+	r.readLock().unlock();
983	+	}
984	+
985	+	/**
986	+	* hasQueuedThreads reports whether there are waiting threads
987	+	*/
988	+	public void testhasQueuedThreads() throws InterruptedException {
989	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
990	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
991	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
992	+	assertFalse(lock.hasQueuedThreads());
993	+	lock.writeLock().lock();
994	+	t1.start();
995	+	Thread.sleep(SHORT_DELAY_MS);
996	+	assertTrue(lock.hasQueuedThreads());
997	+	t2.start();
998	+	Thread.sleep(SHORT_DELAY_MS);
999	+	assertTrue(lock.hasQueuedThreads());
1000	+	t1.interrupt();
1001	+	Thread.sleep(SHORT_DELAY_MS);
1002	+	assertTrue(lock.hasQueuedThreads());
1003	+	lock.writeLock().unlock();
1004	+	Thread.sleep(SHORT_DELAY_MS);
1005	+	assertFalse(lock.hasQueuedThreads());
1006	+	t1.join();
1007	+	t2.join();
1008	+	}
1009	+
1010	+	/**
1011	+	* hasQueuedThread(null) throws NPE
1012	+	*/
1013	+	public void testHasQueuedThreadNPE() {
1014	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1015		try {
1016	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1017	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1018	<	out.writeObject(l);
844	<	out.close();
845	<
846	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
847	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
848	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
849	<	r.readLock().lock();
850	<	r.readLock().unlock();
851	<	} catch(Exception e){
852	<	e.printStackTrace();
853	<	unexpectedException();
854	<	}
1016	>	sync.hasQueuedThread(null);
1017	>	shouldThrow();
1018	>	} catch (NullPointerException success) {}
1019		}
1020
1021		/**
1022	+	* hasQueuedThread reports whether a thread is queued.
1023	+	*/
1024	+	public void testHasQueuedThread() throws InterruptedException {
1025	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1026	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1027	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1028	+	assertFalse(sync.hasQueuedThread(t1));
1029	+	assertFalse(sync.hasQueuedThread(t2));
1030	+	sync.writeLock().lock();
1031	+	t1.start();
1032	+	Thread.sleep(SHORT_DELAY_MS);
1033	+	assertTrue(sync.hasQueuedThread(t1));
1034	+	t2.start();
1035	+	Thread.sleep(SHORT_DELAY_MS);
1036	+	assertTrue(sync.hasQueuedThread(t1));
1037	+	assertTrue(sync.hasQueuedThread(t2));
1038	+	t1.interrupt();
1039	+	Thread.sleep(SHORT_DELAY_MS);
1040	+	assertFalse(sync.hasQueuedThread(t1));
1041	+	assertTrue(sync.hasQueuedThread(t2));
1042	+	sync.writeLock().unlock();
1043	+	Thread.sleep(SHORT_DELAY_MS);
1044	+	assertFalse(sync.hasQueuedThread(t1));
1045	+	Thread.sleep(SHORT_DELAY_MS);
1046	+	assertFalse(sync.hasQueuedThread(t2));
1047	+	t1.join();
1048	+	t2.join();
1049	+	}
1050	+
1051	+
1052	+	/**
1053		* getQueueLength reports number of waiting threads
1054		*/
1055	<	public void testGetQueueLength() {
1056	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1055	>	public void testGetQueueLength() throws InterruptedException {
1056	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1057		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1058		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1059	<	try {
1060	<	assertEquals(0, lock.getQueueLength());
1061	<	lock.writeLock().lock();
1062	<	t1.start();
1063	<	Thread.sleep(SHORT_DELAY_MS);
1064	<	assertEquals(1, lock.getQueueLength());
1065	<	t2.start();
1066	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	assertEquals(2, lock.getQueueLength());
1068	<	t1.interrupt();
1069	<	Thread.sleep(SHORT_DELAY_MS);
1070	<	assertEquals(1, lock.getQueueLength());
1071	<	lock.writeLock().unlock();
1072	<	Thread.sleep(SHORT_DELAY_MS);
1073	<	assertEquals(0, lock.getQueueLength());
1074	<	t1.join();
1075	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1059	>	assertEquals(0, lock.getQueueLength());
1060	>	lock.writeLock().lock();
1061	>	t1.start();
1062	>	Thread.sleep(SHORT_DELAY_MS);
1063	>	assertEquals(1, lock.getQueueLength());
1064	>	t2.start();
1065	>	Thread.sleep(SHORT_DELAY_MS);
1066	>	assertEquals(2, lock.getQueueLength());
1067	>	t1.interrupt();
1068	>	Thread.sleep(SHORT_DELAY_MS);
1069	>	assertEquals(1, lock.getQueueLength());
1070	>	lock.writeLock().unlock();
1071	>	Thread.sleep(SHORT_DELAY_MS);
1072	>	assertEquals(0, lock.getQueueLength());
1073	>	t1.join();
1074	>	t2.join();
1075	>	}
1076
1077		/**
1078		* getQueuedThreads includes waiting threads
1079		*/
1080	<	public void testGetQueuedThreads() {
1081	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1080	>	public void testGetQueuedThreads() throws InterruptedException {
1081	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1082		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1083		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1084	+	assertTrue(lock.getQueuedThreads().isEmpty());
1085	+	lock.writeLock().lock();
1086	+	assertTrue(lock.getQueuedThreads().isEmpty());
1087	+	t1.start();
1088	+	Thread.sleep(SHORT_DELAY_MS);
1089	+	assertTrue(lock.getQueuedThreads().contains(t1));
1090	+	t2.start();
1091	+	Thread.sleep(SHORT_DELAY_MS);
1092	+	assertTrue(lock.getQueuedThreads().contains(t1));
1093	+	assertTrue(lock.getQueuedThreads().contains(t2));
1094	+	t1.interrupt();
1095	+	Thread.sleep(SHORT_DELAY_MS);
1096	+	assertFalse(lock.getQueuedThreads().contains(t1));
1097	+	assertTrue(lock.getQueuedThreads().contains(t2));
1098	+	lock.writeLock().unlock();
1099	+	Thread.sleep(SHORT_DELAY_MS);
1100	+	assertTrue(lock.getQueuedThreads().isEmpty());
1101	+	t1.join();
1102	+	t2.join();
1103	+	}
1104	+
1105	+	/**
1106	+	* hasWaiters throws NPE if null
1107	+	*/
1108	+	public void testHasWaitersNPE() {
1109	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1110		try {
1111	<	assertTrue(lock.getQueuedThreads().isEmpty());
1112	<	lock.writeLock().lock();
1113	<	assertTrue(lock.getQueuedThreads().isEmpty());
1114	<	t1.start();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().contains(t1));
900	<	t2.start();
901	<	Thread.sleep(SHORT_DELAY_MS);
902	<	assertTrue(lock.getQueuedThreads().contains(t1));
903	<	assertTrue(lock.getQueuedThreads().contains(t2));
904	<	t1.interrupt();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	assertFalse(lock.getQueuedThreads().contains(t1));
907	<	assertTrue(lock.getQueuedThreads().contains(t2));
908	<	lock.writeLock().unlock();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	assertTrue(lock.getQueuedThreads().isEmpty());
911	<	t1.join();
912	<	t2.join();
913	<	} catch(Exception e){
914	<	unexpectedException();
915	<	}
916	<	}
1111	>	lock.hasWaiters(null);
1112	>	shouldThrow();
1113	>	} catch (NullPointerException success) {}
1114	>	}
1115
1116		/**
1117	<	* hasWaiters returns true when a thread is waiting, else false
1117	>	* getWaitQueueLength throws NPE if null
1118		*/
1119	<	public void testHasWaiters() {
1120	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1121	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1122	<	Thread t = new Thread(new Runnable() {
1123	<	public void run() {
1124	<	try {
1125	<	lock.writeLock().lock();
1126	<	threadAssertFalse(c.hasWaiters());
929	<	threadAssertEquals(0, c.getWaitQueueLength());
930	<	c.await();
931	<	lock.writeLock().unlock();
932	<	}
933	<	catch(InterruptedException e) {
934	<	threadUnexpectedException();
935	<	}
936	<	}
937	<	});
1119	>	public void testGetWaitQueueLengthNPE() {
1120	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1121	>	try {
1122	>	lock.getWaitQueueLength(null);
1123	>	shouldThrow();
1124	>	} catch (NullPointerException success) {}
1125	>	}
1126	>
1127
1128	+	/**
1129	+	* getWaitingThreads throws NPE if null
1130	+	*/
1131	+	public void testGetWaitingThreadsNPE() {
1132	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1133		try {
1134	<	t.start();
1135	<	Thread.sleep(SHORT_DELAY_MS);
1136	<	lock.writeLock().lock();
943	<	assertTrue(c.hasWaiters());
944	<	assertEquals(1, c.getWaitQueueLength());
945	<	c.signal();
946	<	lock.writeLock().unlock();
947	<	Thread.sleep(SHORT_DELAY_MS);
948	<	lock.writeLock().lock();
949	<	assertFalse(c.hasWaiters());
950	<	assertEquals(0, c.getWaitQueueLength());
951	<	lock.writeLock().unlock();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
954	<	}
955	<	catch (Exception ex) {
956	<	unexpectedException();
957	<	}
1134	>	lock.getWaitingThreads(null);
1135	>	shouldThrow();
1136	>	} catch (NullPointerException success) {}
1137		}
1138
1139		/**
1140	<	* getWaitQueueLength returns number of waiting threads
1140	>	* hasWaiters throws IAE if not owned
1141		*/
1142	<	public void testGetWaitQueueLength() {
1143	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1144	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1145	<	Thread t1 = new Thread(new Runnable() {
1146	<	public void run() {
1147	<	try {
1148	<	lock.writeLock().lock();
1149	<	threadAssertFalse(c.hasWaiters());
1150	<	threadAssertEquals(0, c.getWaitQueueLength());
972	<	c.await();
973	<	lock.writeLock().unlock();
974	<	}
975	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
980	<
981	<	Thread t2 = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.writeLock().lock();
985	<	threadAssertTrue(c.hasWaiters());
986	<	threadAssertEquals(1, c.getWaitQueueLength());
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	}
990	<	catch(InterruptedException e) {
991	<	threadUnexpectedException();
992	<	}
993	<	}
994	<	});
1142	>	public void testHasWaitersIAE() {
1143	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1144	>	final Condition c = lock.writeLock().newCondition();
1145	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1146	>	try {
1147	>	lock2.hasWaiters(c);
1148	>	shouldThrow();
1149	>	} catch (IllegalArgumentException success) {}
1150	>	}
1151
1152	+	/**
1153	+	* hasWaiters throws IMSE if not locked
1154	+	*/
1155	+	public void testHasWaitersIMSE() {
1156	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1157	+	final Condition c = lock.writeLock().newCondition();
1158		try {
1159	<	t1.start();
1160	<	Thread.sleep(SHORT_DELAY_MS);
1161	<	t2.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	lock.writeLock().lock();
1002	<	assertTrue(c.hasWaiters());
1003	<	assertEquals(2, c.getWaitQueueLength());
1004	<	c.signalAll();
1005	<	lock.writeLock().unlock();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	lock.writeLock().lock();
1008	<	assertFalse(c.hasWaiters());
1009	<	assertEquals(0, c.getWaitQueueLength());
1010	<	lock.writeLock().unlock();
1011	<	t1.join(SHORT_DELAY_MS);
1012	<	t2.join(SHORT_DELAY_MS);
1013	<	assertFalse(t1.isAlive());
1014	<	assertFalse(t2.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	unexpectedException();
1018	<	}
1159	>	lock.hasWaiters(c);
1160	>	shouldThrow();
1161	>	} catch (IllegalMonitorStateException success) {}
1162		}
1163
1164	+
1165		/**
1166	<	* getWaitingThreads returns only and all waiting threads
1166	>	* getWaitQueueLength throws IAE if not owned
1167		*/
1168	<	public void testGetWaitingThreads() {
1169	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1170	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1171	<	Thread t1 = new Thread(new Runnable() {
1172	<	public void run() {
1173	<	try {
1174	<	lock.writeLock().lock();
1175	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1176	<	c.await();
1033	<	lock.writeLock().unlock();
1034	<	}
1035	<	catch(InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1040	<
1041	<	Thread t2 = new Thread(new Runnable() {
1042	<	public void run() {
1043	<	try {
1044	<	lock.writeLock().lock();
1045	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
1046	<	c.await();
1047	<	lock.writeLock().unlock();
1048	<	}
1049	<	catch(InterruptedException e) {
1050	<	threadUnexpectedException();
1051	<	}
1052	<	}
1053	<	});
1168	>	public void testGetWaitQueueLengthIAE() {
1169	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1170	>	final Condition c = lock.writeLock().newCondition();
1171	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1172	>	try {
1173	>	lock2.getWaitQueueLength(c);
1174	>	shouldThrow();
1175	>	} catch (IllegalArgumentException success) {}
1176	>	}
1177
1178	+	/**
1179	+	* getWaitQueueLength throws IMSE if not locked
1180	+	*/
1181	+	public void testGetWaitQueueLengthIMSE() {
1182	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1183	+	final Condition c = lock.writeLock().newCondition();
1184		try {
1185	<	lock.writeLock().lock();
1186	<	assertTrue(c.getWaitingThreads().isEmpty());
1187	<	lock.writeLock().unlock();
1188	<	t1.start();
1189	<	Thread.sleep(SHORT_DELAY_MS);
1190	<	t2.start();
1191	<	Thread.sleep(SHORT_DELAY_MS);
1192	<	lock.writeLock().lock();
1193	<	assertTrue(c.hasWaiters());
1194	<	assertTrue(c.getWaitingThreads().contains(t1));
1195	<	assertTrue(c.getWaitingThreads().contains(t2));
1196	<	c.signalAll();
1197	<	lock.writeLock().unlock();
1198	<	Thread.sleep(SHORT_DELAY_MS);
1199	<	lock.writeLock().lock();
1200	<	assertFalse(c.hasWaiters());
1201	<	assertTrue(c.getWaitingThreads().isEmpty());
1202	<	lock.writeLock().unlock();
1203	<	t1.join(SHORT_DELAY_MS);
1204	<	t2.join(SHORT_DELAY_MS);
1205	<	assertFalse(t1.isAlive());
1206	<	assertFalse(t2.isAlive());
1207	<	}
1208	<	catch (Exception ex) {
1209	<	unexpectedException();
1210	<	}
1185	>	lock.getWaitQueueLength(c);
1186	>	shouldThrow();
1187	>	} catch (IllegalMonitorStateException success) {}
1188	>	}
1189	>
1190	>
1191	>	/**
1192	>	* getWaitingThreads throws IAE if not owned
1193	>	*/
1194	>	public void testGetWaitingThreadsIAE() {
1195	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1196	>	final Condition c = lock.writeLock().newCondition();
1197	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1198	>	try {
1199	>	lock2.getWaitingThreads(c);
1200	>	shouldThrow();
1201	>	} catch (IllegalArgumentException success) {}
1202	>	}
1203	>
1204	>	/**
1205	>	* getWaitingThreads throws IMSE if not locked
1206	>	*/
1207	>	public void testGetWaitingThreadsIMSE() {
1208	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1209	>	final Condition c = lock.writeLock().newCondition();
1210	>	try {
1211	>	lock.getWaitingThreads(c);
1212	>	shouldThrow();
1213	>	} catch (IllegalMonitorStateException success) {}
1214	>	}
1215	>
1216	>
1217	>	/**
1218	>	* hasWaiters returns true when a thread is waiting, else false
1219	>	*/
1220	>	public void testHasWaiters() throws InterruptedException {
1221	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1222	>	final Condition c = lock.writeLock().newCondition();
1223	>	Thread t = new Thread(new CheckedRunnable() {
1224	>	public void realRun() throws InterruptedException {
1225	>	lock.writeLock().lock();
1226	>	threadAssertFalse(lock.hasWaiters(c));
1227	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1228	>	c.await();
1229	>	lock.writeLock().unlock();
1230	>	}});
1231	>
1232	>	t.start();
1233	>	Thread.sleep(SHORT_DELAY_MS);
1234	>	lock.writeLock().lock();
1235	>	assertTrue(lock.hasWaiters(c));
1236	>	assertEquals(1, lock.getWaitQueueLength(c));
1237	>	c.signal();
1238	>	lock.writeLock().unlock();
1239	>	Thread.sleep(SHORT_DELAY_MS);
1240	>	lock.writeLock().lock();
1241	>	assertFalse(lock.hasWaiters(c));
1242	>	assertEquals(0, lock.getWaitQueueLength(c));
1243	>	lock.writeLock().unlock();
1244	>	t.join(SHORT_DELAY_MS);
1245	>	assertFalse(t.isAlive());
1246	>	}
1247	>
1248	>	/**
1249	>	* getWaitQueueLength returns number of waiting threads
1250	>	*/
1251	>	public void testGetWaitQueueLength() throws InterruptedException {
1252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1253	>	final Condition c = lock.writeLock().newCondition();
1254	>	Thread t = new Thread(new CheckedRunnable() {
1255	>	public void realRun() throws InterruptedException {
1256	>	lock.writeLock().lock();
1257	>	threadAssertFalse(lock.hasWaiters(c));
1258	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1259	>	c.await();
1260	>	lock.writeLock().unlock();
1261	>	}});
1262	>
1263	>	t.start();
1264	>	Thread.sleep(SHORT_DELAY_MS);
1265	>	lock.writeLock().lock();
1266	>	assertTrue(lock.hasWaiters(c));
1267	>	assertEquals(1, lock.getWaitQueueLength(c));
1268	>	c.signal();
1269	>	lock.writeLock().unlock();
1270	>	Thread.sleep(SHORT_DELAY_MS);
1271	>	lock.writeLock().lock();
1272	>	assertFalse(lock.hasWaiters(c));
1273	>	assertEquals(0, lock.getWaitQueueLength(c));
1274	>	lock.writeLock().unlock();
1275	>	t.join(SHORT_DELAY_MS);
1276	>	assertFalse(t.isAlive());
1277	>	}
1278	>
1279	>
1280	>	/**
1281	>	* getWaitingThreads returns only and all waiting threads
1282	>	*/
1283	>	public void testGetWaitingThreads() throws InterruptedException {
1284	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1285	>	final Condition c = lock.writeLock().newCondition();
1286	>	Thread t1 = new Thread(new CheckedRunnable() {
1287	>	public void realRun() throws InterruptedException {
1288	>	lock.writeLock().lock();
1289	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1290	>	c.await();
1291	>	lock.writeLock().unlock();
1292	>	}});
1293	>
1294	>	Thread t2 = new Thread(new CheckedRunnable() {
1295	>	public void realRun() throws InterruptedException {
1296	>	lock.writeLock().lock();
1297	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1298	>	c.await();
1299	>	lock.writeLock().unlock();
1300	>	}});
1301	>
1302	>	lock.writeLock().lock();
1303	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1304	>	lock.writeLock().unlock();
1305	>	t1.start();
1306	>	Thread.sleep(SHORT_DELAY_MS);
1307	>	t2.start();
1308	>	Thread.sleep(SHORT_DELAY_MS);
1309	>	lock.writeLock().lock();
1310	>	assertTrue(lock.hasWaiters(c));
1311	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1312	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1313	>	c.signalAll();
1314	>	lock.writeLock().unlock();
1315	>	Thread.sleep(SHORT_DELAY_MS);
1316	>	lock.writeLock().lock();
1317	>	assertFalse(lock.hasWaiters(c));
1318	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1319	>	lock.writeLock().unlock();
1320	>	t1.join(SHORT_DELAY_MS);
1321	>	t2.join(SHORT_DELAY_MS);
1322	>	assertFalse(t1.isAlive());
1323	>	assertFalse(t2.isAlive());
1324	>	}
1325	>
1326	>	/**
1327	>	* toString indicates current lock state
1328	>	*/
1329	>	public void testToString() {
1330	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1331	>	String us = lock.toString();
1332	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1333	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1334	>	lock.writeLock().lock();
1335	>	String ws = lock.toString();
1336	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1337	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1338	>	lock.writeLock().unlock();
1339	>	lock.readLock().lock();
1340	>	lock.readLock().lock();
1341	>	String rs = lock.toString();
1342	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1343	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1344	>	}
1345	>
1346	>	/**
1347	>	* readLock.toString indicates current lock state
1348	>	*/
1349	>	public void testReadLockToString() {
1350	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1351	>	String us = lock.readLock().toString();
1352	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1353	>	lock.readLock().lock();
1354	>	lock.readLock().lock();
1355	>	String rs = lock.readLock().toString();
1356	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1357	>	}
1358	>
1359	>	/**
1360	>	* writeLock.toString indicates current lock state
1361	>	*/
1362	>	public void testWriteLockToString() {
1363	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1364	>	String us = lock.writeLock().toString();
1365	>	assertTrue(us.indexOf("Unlocked") >= 0);
1366	>	lock.writeLock().lock();
1367	>	String ls = lock.writeLock().toString();
1368	>	assertTrue(ls.indexOf("Locked") >= 0);
1369		}
1370
1371		}

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