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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.52 by jsr166, Mon May 2 00:34:12 2011 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/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 {
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 PublicCondition newCondition() {
57	<	return new PublicCondition();
61	<	}
62	<
63	<	class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
64	<	PublicCondition() { }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
59	+	}
60
61	+	/**
62	+	* Releases lock, checking that it had a hold count of 1.
63	+	*/
64	+	void releaseLock(ReentrantReadWriteLock.WriteLock lock) {
65	+	assertTrue(lock.isHeldByCurrentThread());
66	+	lock.unlock();
67	+	assertFalse(lock.isHeldByCurrentThread());
68		}
69
70		/**
71		* Constructor sets given fairness, and is in unlocked state
72		*/
73	<	public void testConstructor() {
74	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
73	>	public void testConstructor() {
74	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
75		assertFalse(rl.isFair());
76		assertFalse(rl.isWriteLocked());
77		assertEquals(0, rl.getReadLockCount());
78	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
78	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
79		assertTrue(r2.isFair());
80		assertFalse(r2.isWriteLocked());
81		assertEquals(0, r2.getReadLockCount());
82	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
83	+	assertFalse(r3.isFair());
84	+	assertFalse(r3.isWriteLocked());
85	+	assertEquals(0, r3.getReadLockCount());
86		}
87
88		/**
89		* write-locking and read-locking an unlocked lock succeed
90		*/
91	<	public void testLock() {
92	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
91	>	public void testLock() {
92	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
93		rl.writeLock().lock();
94		assertTrue(rl.isWriteLocked());
95		assertTrue(rl.isWriteLockedByCurrentThread());
96	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
97		assertEquals(0, rl.getReadLockCount());
98		rl.writeLock().unlock();
99		assertFalse(rl.isWriteLocked());
100		assertFalse(rl.isWriteLockedByCurrentThread());
101	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
102		assertEquals(0, rl.getReadLockCount());
103		rl.readLock().lock();
104		assertFalse(rl.isWriteLocked());
#	Line 110 | Line 114 | public class ReentrantReadWriteLockTest
114		/**
115		* locking an unlocked fair lock succeeds
116		*/
117	<	public void testFairLock() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
117	>	public void testFairLock() {
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
119		rl.writeLock().lock();
120		assertTrue(rl.isWriteLocked());
121		assertTrue(rl.isWriteLockedByCurrentThread());
122	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
123		assertEquals(0, rl.getReadLockCount());
124		rl.writeLock().unlock();
125		assertFalse(rl.isWriteLocked());
126		assertFalse(rl.isWriteLockedByCurrentThread());
127	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
128		assertEquals(0, rl.getReadLockCount());
129		rl.readLock().lock();
130		assertFalse(rl.isWriteLocked());
#	Line 133 | Line 139 | public class ReentrantReadWriteLockTest
139		/**
140		* getWriteHoldCount returns number of recursive holds
141		*/
142	<	public void testGetHoldCount() {
143	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
144	<	for(int i = 1; i <= SIZE; i++) {
145	<	lock.writeLock().lock();
146	<	assertEquals(i,lock.getWriteHoldCount());
147	<	}
148	<	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();
142	>	public void testGetWriteHoldCount() {
143	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
144	>	for (int i = 1; i <= SIZE; i++) {
145	>	lock.writeLock().lock();
146	>	assertEquals(i,lock.getWriteHoldCount());
147	>	}
148	>	for (int i = SIZE; i > 0; i--) {
149		lock.writeLock().unlock();
150	<	t.join();
180	<	} catch(Exception e){
181	<	unexpectedException();
150	>	assertEquals(i-1,lock.getWriteHoldCount());
151		}
152	<	}
152	>	}
153
154		/**
155	<	* timed write-trylock is interruptible
155	>	* WriteLock.getHoldCount returns number of recursive holds
156		*/
157	<	public void testWriteTryLock_Interrupted() {
158	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	<	lock.writeLock().lock();
160	<	Thread t = new Thread(new Runnable() {
161	<	public void run() {
162	<	try {
163	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
195	<	threadShouldThrow();
196	<	} catch(InterruptedException success){}
197	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.interrupt();
157	>	public void testGetHoldCount() {
158	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	>	for (int i = 1; i <= SIZE; i++) {
160	>	lock.writeLock().lock();
161	>	assertEquals(i,lock.writeLock().getHoldCount());
162	>	}
163	>	for (int i = SIZE; i > 0; i--) {
164		lock.writeLock().unlock();
165	<	t.join();
204	<	} catch(Exception e){
205	<	unexpectedException();
165	>	assertEquals(i-1,lock.writeLock().getHoldCount());
166		}
167		}
168
169		/**
170	<	* read-lockInterruptibly is interruptible
170	>	* getReadHoldCount returns number of recursive holds
171		*/
172	<	public void testReadLockInterruptibly_Interrupted() {
173	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	<	lock.writeLock().lock();
175	<	Thread t = new Thread(new Runnable() {
176	<	public void run() {
177	<	try {
178	<	lock.readLock().lockInterruptibly();
179	<	threadShouldThrow();
180	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
225	<	t.interrupt();
226	<	lock.writeLock().unlock();
227	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
172	>	public void testGetReadHoldCount() {
173	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	>	for (int i = 1; i <= SIZE; i++) {
175	>	lock.readLock().lock();
176	>	assertEquals(i,lock.getReadHoldCount());
177	>	}
178	>	for (int i = SIZE; i > 0; i--) {
179	>	lock.readLock().unlock();
180	>	assertEquals(i-1,lock.getReadHoldCount());
181		}
182	<	}
182	>	}
183	>
184
185		/**
186	<	* timed read-trylock is interruptible
186	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
187		*/
188	<	public void testReadTryLock_Interrupted() {
189	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
238	<	lock.writeLock().lock();
239	<	Thread t = new Thread(new Runnable() {
240	<	public void run() {
241	<	try {
242	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
243	<	threadShouldThrow();
244	<	} catch(InterruptedException success){}
245	<	}
246	<	});
188	>	public void testUnlock_IllegalMonitorStateException() {
189	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
190		try {
191	<	t.start();
192	<	t.interrupt();
193	<	t.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
253	<	}
191	>	rl.writeLock().unlock();
192	>	shouldThrow();
193	>	} catch (IllegalMonitorStateException success) {}
194		}
195
196	<
196	>
197		/**
198	<	* write-trylock fails if locked
198	>	* write-lockInterruptibly is interruptible
199		*/
200	<	public void testWriteTryLockWhenLocked() {
201	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	lock.writeLock().lock();
203	<	Thread t = new Thread(new Runnable() {
204	<	public void run() {
205	<	threadAssertFalse(lock.writeLock().tryLock());
206	<	}
207	<	});
208	<	try {
209	<	t.start();
210	<	t.join();
211	<	lock.writeLock().unlock();
212	<	} catch(Exception e){
273	<	unexpectedException();
274	<	}
275	<	}
200	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
201	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	lock.writeLock().lock();
203	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
204	>	public void realRun() throws InterruptedException {
205	>	lock.writeLock().lockInterruptibly();
206	>	}});
207	>
208	>	Thread.sleep(SHORT_DELAY_MS);
209	>	t.interrupt();
210	>	t.join();
211	>	releaseLock(lock.writeLock());
212	>	}
213
214		/**
215	<	* read-trylock fails if locked
215	>	* timed write-tryLock is interruptible
216		*/
217	<	public void testReadTryLockWhenLocked() {
218	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	<	lock.writeLock().lock();
220	<	Thread t = new Thread(new Runnable() {
221	<	public void run() {
222	<	threadAssertFalse(lock.readLock().tryLock());
223	<	}
224	<	});
225	<	try {
226	<	t.start();
227	<	t.join();
228	<	lock.writeLock().unlock();
229	<	} catch(Exception e){
293	<	unexpectedException();
294	<	}
295	<	}
217	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
218	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	>	lock.writeLock().lock();
220	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
221	>	public void realRun() throws InterruptedException {
222	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
223	>	}});
224	>
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	t.interrupt();
227	>	t.join();
228	>	releaseLock(lock.writeLock());
229	>	}
230
231		/**
232	<	* Multiple threads can hold a read lock when not write-locked
232	>	* read-lockInterruptibly is interruptible
233		*/
234	<	public void testMultipleReadLocks() {
235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	<	lock.readLock().lock();
237	<	Thread t = new Thread(new Runnable() {
238	<	public void run() {
239	<	threadAssertTrue(lock.readLock().tryLock());
240	<	lock.readLock().unlock();
241	<	}
242	<	});
243	<	try {
244	<	t.start();
245	<	t.join();
246	<	lock.readLock().unlock();
313	<	} catch(Exception e){
314	<	unexpectedException();
315	<	}
316	<	}
234	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	>	lock.writeLock().lock();
237	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
238	>	public void realRun() throws InterruptedException {
239	>	lock.readLock().lockInterruptibly();
240	>	}});
241	>
242	>	Thread.sleep(SHORT_DELAY_MS);
243	>	t.interrupt();
244	>	t.join();
245	>	releaseLock(lock.writeLock());
246	>	}
247
248		/**
249	<	* A writelock succeeds after reading threads unlock
249	>	* timed read-tryLock is interruptible
250		*/
251	<	public void testWriteAfterMultipleReadLocks() {
252	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	<	lock.readLock().lock();
254	<	Thread t1 = new Thread(new Runnable() {
255	<	public void run() {
256	<	lock.readLock().lock();
257	<	lock.readLock().unlock();
258	<	}
259	<	});
260	<	Thread t2 = new Thread(new Runnable() {
261	<	public void run() {
262	<	lock.writeLock().lock();
263	<	lock.writeLock().unlock();
334	<	}
335	<	});
251	>	public void testReadTryLock_Interrupted() throws InterruptedException {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	>	lock.writeLock().lock();
254	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
255	>	public void realRun() throws InterruptedException {
256	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
257	>	}});
258	>
259	>	Thread.sleep(SHORT_DELAY_MS);
260	>	t.interrupt();
261	>	t.join();
262	>	releaseLock(lock.writeLock());
263	>	}
264
337	–	try {
338	–	t1.start();
339	–	t2.start();
340	–	Thread.sleep(SHORT_DELAY_MS);
341	–	lock.readLock().unlock();
342	–	t1.join(MEDIUM_DELAY_MS);
343	–	t2.join(MEDIUM_DELAY_MS);
344	–	assertTrue(!t1.isAlive());
345	–	assertTrue(!t2.isAlive());
346	–
347	–	} catch(Exception e){
348	–	unexpectedException();
349	–	}
350	–	}
265
266		/**
267	<	* Readlocks succeed after a writing thread unlocks
267	>	* write-tryLock fails if locked
268		*/
269	<	public void testReadAfterWriteLock() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.writeLock().lock();
272	<	Thread t1 = new Thread(new Runnable() {
273	<	public void run() {
274	<	lock.readLock().lock();
275	<	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	<	});
370	<
371	<	try {
372	<	t1.start();
373	<	t2.start();
374	<	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	<	}
269	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedRunnable() {
273	>	public void realRun() {
274	>	assertFalse(lock.writeLock().tryLock());
275	>	}});
276
277	+	t.join();
278	+	lock.writeLock().unlock();
279	+	}
280
281		/**
282	<	* Read trylock succeeds if readlocked but not writelocked
282	>	* read-tryLock fails if locked
283		*/
284	<	public void testTryLockWhenReadLocked() {
285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	<	lock.readLock().lock();
287	<	Thread t = new Thread(new Runnable() {
288	<	public void run() {
289	<	threadAssertTrue(lock.readLock().tryLock());
290	<	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	<	}
284	>	public void testReadTryLockWhenLocked() throws InterruptedException {
285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	>	lock.writeLock().lock();
287	>	Thread t = newStartedThread(new CheckedRunnable() {
288	>	public void realRun() {
289	>	assertFalse(lock.readLock().tryLock());
290	>	}});
291
292	<
292	>	t.join();
293	>	lock.writeLock().unlock();
294	>	}
295
296		/**
297	<	* write trylock fails when readlocked
297	>	* Multiple threads can hold a read lock when not write-locked
298		*/
299	<	public void testWriteTryLockWhenReadLocked() {
300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	<	lock.readLock().lock();
302	<	Thread t = new Thread(new Runnable() {
303	<	public void run() {
304	<	threadAssertFalse(lock.writeLock().tryLock());
305	<	}
306	<	});
421	<	try {
422	<	t.start();
423	<	t.join();
424	<	lock.readLock().unlock();
425	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
299	>	public void testMultipleReadLocks() throws InterruptedException {
300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	>	lock.readLock().lock();
302	>	Thread t = newStartedThread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	assertTrue(lock.readLock().tryLock());
305	>	lock.readLock().unlock();
306	>	}});
307
308	<
308	>	t.join();
309	>	lock.readLock().unlock();
310	>	}
311
312		/**
313	<	* write timed trylock times out if locked
313	>	* A writelock succeeds after reading threads unlock
314		*/
315	<	public void testWriteTryLock_Timeout() {
316	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	<	lock.writeLock().lock();
318	<	Thread t = new Thread(new Runnable() {
319	<	public void run() {
320	<	try {
321	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
322	<	} catch (Exception ex) {
323	<	threadUnexpectedException();
324	<	}
325	<	}
326	<	});
327	<	try {
328	<	t.start();
329	<	t.join();
330	<	lock.writeLock().unlock();
331	<	} catch(Exception e){
332	<	unexpectedException();
333	<	}
334	<	}
315	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
316	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	>	lock.readLock().lock();
318	>	Thread t1 = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	lock.readLock().lock();
321	>	lock.readLock().unlock();
322	>	}});
323	>	Thread t2 = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	lock.writeLock().lock();
326	>	lock.writeLock().unlock();
327	>	}});
328	>
329	>	Thread.sleep(SHORT_DELAY_MS);
330	>	lock.readLock().unlock();
331	>	t1.join(MEDIUM_DELAY_MS);
332	>	t2.join(MEDIUM_DELAY_MS);
333	>	assertTrue(!t1.isAlive());
334	>	assertTrue(!t2.isAlive());
335	>	}
336
337		/**
338	<	* read timed trylock times out if write-locked
338	>	* Readlocks succeed after a writing thread unlocks
339		*/
340	<	public void testReadTryLock_Timeout() {
341	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
342	<	lock.writeLock().lock();
343	<	Thread t = new Thread(new Runnable() {
344	<	public void run() {
345	<	try {
346	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
347	<	} catch (Exception ex) {
348	<	threadUnexpectedException();
349	<	}
350	<	}
351	<	});
352	<	try {
353	<	t.start();
354	<	t.join();
355	<	lock.writeLock().unlock();
356	<	} catch(Exception e){
357	<	unexpectedException();
358	<	}
359	<	}
340	>	public void testReadAfterWriteLock() throws InterruptedException {
341	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
342	>	lock.writeLock().lock();
343	>	Thread t1 = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() {
345	>	lock.readLock().lock();
346	>	lock.readLock().unlock();
347	>	}});
348	>	Thread t2 = newStartedThread(new CheckedRunnable() {
349	>	public void realRun() {
350	>	lock.readLock().lock();
351	>	lock.readLock().unlock();
352	>	}});
353	>
354	>	Thread.sleep(SHORT_DELAY_MS);
355	>	lock.writeLock().unlock();
356	>	t1.join(MEDIUM_DELAY_MS);
357	>	t2.join(MEDIUM_DELAY_MS);
358	>	assertTrue(!t1.isAlive());
359	>	assertTrue(!t2.isAlive());
360	>	}
361	>
362	>	/**
363	>	* Read trylock succeeds if write locked by current thread
364	>	*/
365	>	public void testReadHoldingWriteLock() {
366	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
367	>	lock.writeLock().lock();
368	>	assertTrue(lock.readLock().tryLock());
369	>	lock.readLock().unlock();
370	>	lock.writeLock().unlock();
371	>	}
372	>
373	>	/**
374	>	* Read lock succeeds if write locked by current thread even if
375	>	* other threads are waiting for readlock
376	>	*/
377	>	public void testReadHoldingWriteLock2() throws InterruptedException {
378	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
379	>	lock.writeLock().lock();
380	>	Thread t1 = newStartedThread(new CheckedRunnable() {
381	>	public void realRun() {
382	>	lock.readLock().lock();
383	>	lock.readLock().unlock();
384	>	}});
385	>	Thread t2 = newStartedThread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	lock.readLock().lock();
388	>	lock.readLock().unlock();
389	>	}});
390	>
391	>	lock.readLock().lock();
392	>	lock.readLock().unlock();
393	>	Thread.sleep(SHORT_DELAY_MS);
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	lock.writeLock().unlock();
397	>	t1.join(MEDIUM_DELAY_MS);
398	>	t2.join(MEDIUM_DELAY_MS);
399	>	assertTrue(!t1.isAlive());
400	>	assertTrue(!t2.isAlive());
401	>	}
402	>
403	>	/**
404	>	* Read lock succeeds if write locked by current thread even if
405	>	* other threads are waiting for writelock
406	>	*/
407	>	public void testReadHoldingWriteLock3() throws InterruptedException {
408	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
409	>	lock.writeLock().lock();
410	>	Thread t1 = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	lock.writeLock().lock();
413	>	lock.writeLock().unlock();
414	>	}});
415	>	Thread t2 = newStartedThread(new CheckedRunnable() {
416	>	public void realRun() {
417	>	lock.writeLock().lock();
418	>	lock.writeLock().unlock();
419	>	}});
420	>
421	>	lock.readLock().lock();
422	>	lock.readLock().unlock();
423	>	Thread.sleep(SHORT_DELAY_MS);
424	>	lock.readLock().lock();
425	>	lock.readLock().unlock();
426	>	lock.writeLock().unlock();
427	>	t1.join(MEDIUM_DELAY_MS);
428	>	t2.join(MEDIUM_DELAY_MS);
429	>	assertTrue(!t1.isAlive());
430	>	assertTrue(!t2.isAlive());
431	>	}
432	>
433	>
434	>	/**
435	>	* Write lock succeeds if write locked by current thread even if
436	>	* other threads are waiting for writelock
437	>	*/
438	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	>	lock.writeLock().lock();
441	>	Thread t1 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446	>	Thread t2 = newStartedThread(new CheckedRunnable() {
447	>	public void realRun() {
448	>	lock.writeLock().lock();
449	>	lock.writeLock().unlock();
450	>	}});
451	>
452	>	lock.writeLock().lock();
453	>	lock.writeLock().unlock();
454	>	Thread.sleep(SHORT_DELAY_MS);
455	>	lock.writeLock().lock();
456	>	lock.writeLock().unlock();
457	>	lock.writeLock().unlock();
458	>	t1.join(MEDIUM_DELAY_MS);
459	>	t2.join(MEDIUM_DELAY_MS);
460	>	assertTrue(!t1.isAlive());
461	>	assertTrue(!t2.isAlive());
462	>	}
463	>
464	>
465	>	/**
466	>	* Fair Read trylock succeeds if write locked by current thread
467	>	*/
468	>	public void testReadHoldingWriteLockFair() {
469	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
470	>	lock.writeLock().lock();
471	>	assertTrue(lock.readLock().tryLock());
472	>	lock.readLock().unlock();
473	>	lock.writeLock().unlock();
474	>	}
475	>
476	>	/**
477	>	* Fair Read lock succeeds if write locked by current thread even if
478	>	* other threads are waiting for readlock
479	>	*/
480	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
481	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
482	>	lock.writeLock().lock();
483	>	Thread t1 = newStartedThread(new CheckedRunnable() {
484	>	public void realRun() {
485	>	lock.readLock().lock();
486	>	lock.readLock().unlock();
487	>	}});
488	>	Thread t2 = newStartedThread(new CheckedRunnable() {
489	>	public void realRun() {
490	>	lock.readLock().lock();
491	>	lock.readLock().unlock();
492	>	}});
493	>
494	>	lock.readLock().lock();
495	>	lock.readLock().unlock();
496	>	Thread.sleep(SHORT_DELAY_MS);
497	>	lock.readLock().lock();
498	>	lock.readLock().unlock();
499	>	lock.writeLock().unlock();
500	>	t1.join(MEDIUM_DELAY_MS);
501	>	t2.join(MEDIUM_DELAY_MS);
502	>	assertTrue(!t1.isAlive());
503	>	assertTrue(!t2.isAlive());
504	>	}
505	>
506	>
507	>	/**
508	>	* Fair Read lock succeeds if write locked by current thread even if
509	>	* other threads are waiting for writelock
510	>	*/
511	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
512	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
513	>	lock.writeLock().lock();
514	>	Thread t1 = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}});
519	>	Thread t2 = newStartedThread(new CheckedRunnable() {
520	>	public void realRun() {
521	>	lock.writeLock().lock();
522	>	lock.writeLock().unlock();
523	>	}});
524	>
525	>	lock.readLock().lock();
526	>	lock.readLock().unlock();
527	>	Thread.sleep(SHORT_DELAY_MS);
528	>	lock.readLock().lock();
529	>	lock.readLock().unlock();
530	>	lock.writeLock().unlock();
531	>	t1.join(MEDIUM_DELAY_MS);
532	>	t2.join(MEDIUM_DELAY_MS);
533	>	assertTrue(!t1.isAlive());
534	>	assertTrue(!t2.isAlive());
535	>	}
536	>
537	>
538	>	/**
539	>	* Fair Write lock succeeds if write locked by current thread even if
540	>	* other threads are waiting for writelock
541	>	*/
542	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
543	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
544	>	lock.writeLock().lock();
545	>	Thread t1 = newStartedThread(new CheckedRunnable() {
546	>	public void realRun() {
547	>	lock.writeLock().lock();
548	>	lock.writeLock().unlock();
549	>	}});
550	>	Thread t2 = newStartedThread(new CheckedRunnable() {
551	>	public void realRun() {
552	>	lock.writeLock().lock();
553	>	lock.writeLock().unlock();
554	>	}});
555	>
556	>	Thread.sleep(SHORT_DELAY_MS);
557	>	assertTrue(lock.isWriteLockedByCurrentThread());
558	>	assertEquals(1, lock.getWriteHoldCount());
559	>	lock.writeLock().lock();
560	>	assertEquals(2, lock.getWriteHoldCount());
561	>	lock.writeLock().unlock();
562	>	lock.writeLock().lock();
563	>	lock.writeLock().unlock();
564	>	lock.writeLock().unlock();
565	>	t1.join(MEDIUM_DELAY_MS);
566	>	t2.join(MEDIUM_DELAY_MS);
567	>	assertTrue(!t1.isAlive());
568	>	assertTrue(!t2.isAlive());
569	>	}
570	>
571	>
572	>	/**
573	>	* Read tryLock succeeds if readlocked but not writelocked
574	>	*/
575	>	public void testTryLockWhenReadLocked() throws InterruptedException {
576	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
577	>	lock.readLock().lock();
578	>	Thread t = newStartedThread(new CheckedRunnable() {
579	>	public void realRun() {
580	>	assertTrue(lock.readLock().tryLock());
581	>	lock.readLock().unlock();
582	>	}});
583	>
584	>	t.join();
585	>	lock.readLock().unlock();
586	>	}
587	>
588	>	/**
589	>	* write tryLock fails when readlocked
590	>	*/
591	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
592	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
593	>	lock.readLock().lock();
594	>	Thread t = newStartedThread(new CheckedRunnable() {
595	>	public void realRun() {
596	>	assertFalse(lock.writeLock().tryLock());
597	>	}});
598	>
599	>	t.join();
600	>	lock.readLock().unlock();
601	>	}
602	>
603	>
604	>	/**
605	>	* Fair Read tryLock succeeds if readlocked but not writelocked
606	>	*/
607	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
608	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
609	>	lock.readLock().lock();
610	>	Thread t = newStartedThread(new CheckedRunnable() {
611	>	public void realRun() {
612	>	assertTrue(lock.readLock().tryLock());
613	>	lock.readLock().unlock();
614	>	}});
615	>
616	>	t.join();
617	>	lock.readLock().unlock();
618	>	}
619	>
620	>
621	>
622	>	/**
623	>	* Fair write tryLock fails when readlocked
624	>	*/
625	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertFalse(lock.writeLock().tryLock());
631	>	}});
632	>
633	>	t.join();
634	>	lock.readLock().unlock();
635	>	}
636	>
637	>
638	>
639	>	/**
640	>	* write timed tryLock times out if locked
641	>	*/
642	>	public void testWriteTryLock_Timeout() throws InterruptedException {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	>	lock.writeLock().lock();
645	>	Thread t = newStartedThread(new CheckedRunnable() {
646	>	public void realRun() throws InterruptedException {
647	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
648	>	}});
649	>
650	>	t.join();
651	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
652	>	lock.writeLock().unlock();
653	>	}
654	>
655	>	/**
656	>	* read timed tryLock times out if write-locked
657	>	*/
658	>	public void testReadTryLock_Timeout() throws InterruptedException {
659	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
660	>	lock.writeLock().lock();
661	>	Thread t = newStartedThread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
664	>	}});
665	>
666	>	t.join();
667	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
668	>	lock.writeLock().unlock();
669	>	}
670
671
672		/**
673		* write lockInterruptibly succeeds if lock free else is interruptible
674		*/
675	<	public void testWriteLockInterruptibly() {
676	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	<	try {
678	<	lock.writeLock().lockInterruptibly();
679	<	} catch(Exception e) {
680	<	unexpectedException();
681	<	}
682	<	Thread t = new Thread(new Runnable() {
683	<	public void run() {
684	<	try {
685	<	lock.writeLock().lockInterruptibly();
686	<	threadShouldThrow();
496	<	}
497	<	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	<	}
675	>	public void testWriteLockInterruptibly() throws InterruptedException {
676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	>	lock.writeLock().lockInterruptibly();
678	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
679	>	public void realRun() throws InterruptedException {
680	>	lock.writeLock().lockInterruptibly();
681	>	}});
682	>
683	>	Thread.sleep(SHORT_DELAY_MS);
684	>	t.interrupt();
685	>	t.join();
686	>	releaseLock(lock.writeLock());
687		}
688
689		/**
690	<	*  read lockInterruptibly succeeds if lock free else is interruptible
690	>	* read lockInterruptibly succeeds if lock free else is interruptible
691		*/
692	<	public void testReadLockInterruptibly() {
693	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
694	<	try {
695	<	lock.writeLock().lockInterruptibly();
696	<	} catch(Exception e) {
697	<	unexpectedException();
698	<	}
699	<	Thread t = new Thread(new Runnable() {
700	<	public void run() {
701	<	try {
702	<	lock.readLock().lockInterruptibly();
703	<	threadShouldThrow();
526	<	}
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	<	}
692	>	public void testReadLockInterruptibly() throws InterruptedException {
693	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
694	>	lock.writeLock().lockInterruptibly();
695	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
696	>	public void realRun() throws InterruptedException {
697	>	lock.readLock().lockInterruptibly();
698	>	}});
699	>
700	>	Thread.sleep(SHORT_DELAY_MS);
701	>	t.interrupt();
702	>	t.join();
703	>	releaseLock(lock.writeLock());
704		}
705
706		/**
707		* Calling await without holding lock throws IllegalMonitorStateException
708		*/
709	<	public void testAwait_IllegalMonitor() {
710	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
709	>	public void testAwait_IllegalMonitor() throws InterruptedException {
710	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
711		final Condition c = lock.writeLock().newCondition();
712		try {
713		c.await();
714		shouldThrow();
715	<	}
551	<	catch (IllegalMonitorStateException success) {
552	<	}
553	<	catch (Exception ex) {
554	<	shouldThrow();
555	<	}
715	>	} catch (IllegalMonitorStateException success) {}
716		}
717
718		/**
719		* Calling signal without holding lock throws IllegalMonitorStateException
720		*/
721		public void testSignal_IllegalMonitor() {
722	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
723		final Condition c = lock.writeLock().newCondition();
724		try {
725		c.signal();
726		shouldThrow();
727	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
727	>	} catch (IllegalMonitorStateException success) {}
728		}
729
730		/**
731		* awaitNanos without a signal times out
732		*/
733	<	public void testAwaitNanos_Timeout() {
734	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
733	>	public void testAwaitNanos_Timeout() throws InterruptedException {
734	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
735		final Condition c = lock.writeLock().newCondition();
736	<	try {
737	<	lock.writeLock().lock();
738	<	long t = c.awaitNanos(100);
739	<	assertTrue(t <= 0);
740	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
736	>
737	>	lock.writeLock().lock();
738	>	long t = c.awaitNanos(100);
739	>	assertTrue(t <= 0);
740	>	lock.writeLock().unlock();
741		}
742
743
744		/**
745	<	*  timed await without a signal times out
745	>	* timed await without a signal times out
746		*/
747	<	public void testAwait_Timeout() {
748	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
747	>	public void testAwait_Timeout() throws InterruptedException {
748	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
749		final Condition c = lock.writeLock().newCondition();
750	<	try {
751	<	lock.writeLock().lock();
752	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
602	<	lock.writeLock().unlock();
603	<	}
604	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
750	>	lock.writeLock().lock();
751	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
752	>	lock.writeLock().unlock();
753		}
754
755		/**
756		* awaitUntil without a signal times out
757		*/
758	<	public void testAwaitUntil_Timeout() {
759	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
758	>	public void testAwaitUntil_Timeout() throws InterruptedException {
759	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
760		final Condition c = lock.writeLock().newCondition();
761	<	try {
762	<	lock.writeLock().lock();
763	<	java.util.Date d = new java.util.Date();
764	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
761	>	lock.writeLock().lock();
762	>	java.util.Date d = new java.util.Date();
763	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
764	>	lock.writeLock().unlock();
765		}
766
767		/**
768		* await returns when signalled
769		*/
770	<	public void testAwait() {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
770	>	public void testAwait() throws InterruptedException {
771	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772		final Condition c = lock.writeLock().newCondition();
773	<	Thread t = new Thread(new Runnable() {
774	<	public void run() {
775	<	try {
776	<	lock.writeLock().lock();
777	<	c.await();
778	<	lock.writeLock().unlock();
779	<	}
780	<	catch(InterruptedException e) {
781	<	threadUnexpectedException();
782	<	}
783	<	}
784	<	});
773	>	Thread t = newStartedThread(new CheckedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	lock.writeLock().lock();
776	>	c.await();
777	>	lock.writeLock().unlock();
778	>	}});
779	>
780	>	Thread.sleep(SHORT_DELAY_MS);
781	>	lock.writeLock().lock();
782	>	c.signal();
783	>	lock.writeLock().unlock();
784	>	t.join(SHORT_DELAY_MS);
785	>	assertFalse(t.isAlive());
786	>	}
787	>
788	>	/** A helper class for uninterruptible wait tests */
789	>	class UninterruptableThread extends Thread {
790	>	private Lock lock;
791	>	private Condition c;
792	>
793	>	public volatile boolean canAwake = false;
794	>	public volatile boolean interrupted = false;
795	>	public volatile boolean lockStarted = false;
796	>
797	>	public UninterruptableThread(Lock lock, Condition c) {
798	>	this.lock = lock;
799	>	this.c = c;
800	>	}
801	>
802	>	public synchronized void run() {
803	>	lock.lock();
804	>	lockStarted = true;
805
806	<	try {
807	<	t.start();
808	<	Thread.sleep(SHORT_DELAY_MS);
809	<	lock.writeLock().lock();
810	<	c.signal();
811	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
806	>	while (!canAwake) {
807	>	c.awaitUninterruptibly();
808	>	}
809	>
810	>	interrupted = isInterrupted();
811	>	lock.unlock();
812		}
813		}
814
815		/**
816		* awaitUninterruptibly doesn't abort on interrupt
817		*/
818	<	public void testAwaitUninterruptibly() {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
818	>	public void testAwaitUninterruptibly() throws InterruptedException {
819	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820		final Condition c = lock.writeLock().newCondition();
821	<	Thread t = new Thread(new Runnable() {
822	<	public void run() {
823	<	lock.writeLock().lock();
824	<	c.awaitUninterruptibly();
825	<	lock.writeLock().unlock();
826	<	}
827	<	});
821	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
822	>
823	>	thread.start();
824	>
825	>	while (!thread.lockStarted) {
826	>	Thread.sleep(100);
827	>	}
828
829	+	lock.writeLock().lock();
830		try {
831	<	t.start();
832	<	Thread.sleep(SHORT_DELAY_MS);
676	<	t.interrupt();
677	<	lock.writeLock().lock();
831	>	thread.interrupt();
832	>	thread.canAwake = true;
833		c.signal();
834	+	} finally {
835		lock.writeLock().unlock();
680	–	assert(t.isInterrupted());
681	–	t.join(SHORT_DELAY_MS);
682	–	assertFalse(t.isAlive());
683	–	}
684	–	catch (Exception ex) {
685	–	unexpectedException();
836		}
837	+
838	+	thread.join();
839	+	assertTrue(thread.interrupted);
840	+	assertFalse(thread.isAlive());
841		}
842
843		/**
844		* await is interruptible
845		*/
846	<	public void testAwait_Interrupt() {
847	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
846	>	public void testAwait_Interrupt() throws InterruptedException {
847	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
848		final Condition c = lock.writeLock().newCondition();
849	<	Thread t = new Thread(new Runnable() {
850	<	public void run() {
851	<	try {
852	<	lock.writeLock().lock();
853	<	c.await();
854	<	lock.writeLock().unlock();
855	<	threadShouldThrow();
856	<	}
857	<	catch(InterruptedException success) {
858	<	}
859	<	}
860	<	});
861	<
862	<	try {
863	<	t.start();
864	<	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	<	}
849	>	final CountDownLatch locked = new CountDownLatch(1);
850	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
851	>	public void realRun() throws InterruptedException {
852	>	lock.writeLock().lock();
853	>	assertTrue(lock.isWriteLocked());
854	>	locked.countDown();
855	>	try { c.await(); }
856	>	finally { lock.writeLock().unlock(); }
857	>	}});
858	>
859	>	locked.await();
860	>	while (lock.isWriteLocked())
861	>	Thread.yield();
862	>	t.interrupt();
863	>	awaitTermination(t, LONG_DELAY_MS);
864	>	assertFalse(lock.isWriteLocked());
865		}
866
867		/**
868		* awaitNanos is interruptible
869		*/
870	<	public void testAwaitNanos_Interrupt() {
871	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
871	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
872		final Condition c = lock.writeLock().newCondition();
873	<	Thread t = new Thread(new Runnable() {
874	<	public void run() {
875	<	try {
876	<	lock.writeLock().lock();
877	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
878	<	lock.writeLock().unlock();
879	<	threadShouldThrow();
880	<	}
881	<	catch(InterruptedException success) {
882	<	}
883	<	}
884	<	});
885	<
886	<	try {
887	<	t.start();
888	<	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	<	}
873	>	final CountDownLatch locked = new CountDownLatch(1);
874	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
875	>	public void realRun() throws InterruptedException {
876	>	lock.writeLock().lock();
877	>	assertTrue(lock.isWriteLocked());
878	>	locked.countDown();
879	>	try { c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); }
880	>	finally { lock.writeLock().unlock(); }
881	>	}});
882	>
883	>	locked.await();
884	>	while (lock.isWriteLocked())
885	>	Thread.yield();
886	>	t.interrupt();
887	>	awaitTermination(t, LONG_DELAY_MS);
888	>	assertFalse(lock.isWriteLocked());
889		}
890
891		/**
892		* awaitUntil is interruptible
893		*/
894	<	public void testAwaitUntil_Interrupt() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
895	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896		final Condition c = lock.writeLock().newCondition();
897	<	Thread t = new Thread(new Runnable() {
898	<	public void run() {
899	<	try {
900	<	lock.writeLock().lock();
901	<	java.util.Date d = new java.util.Date();
902	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
903	<	lock.writeLock().unlock();
904	<	threadShouldThrow();
905	<	}
906	<	catch(InterruptedException success) {
907	<	}
908	<	}
909	<	});
910	<
911	<	try {
912	<	t.start();
913	<	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	<	}
897	>	final CountDownLatch locked = new CountDownLatch(1);
898	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
899	>	public void realRun() throws InterruptedException {
900	>	lock.writeLock().lock();
901	>	assertTrue(lock.isWriteLocked());
902	>	locked.countDown();
903	>	java.util.Date d = new java.util.Date();
904	>	try { c.awaitUntil(new java.util.Date(d.getTime() + 10000)); }
905	>	finally { lock.writeLock().unlock(); }
906	>	}});
907	>
908	>	locked.await();
909	>	while (lock.isWriteLocked())
910	>	Thread.yield();
911	>	t.interrupt();
912	>	awaitTermination(t, LONG_DELAY_MS);
913	>	assertFalse(lock.isWriteLocked());
914		}
915
916		/**
917		* signalAll wakes up all threads
918		*/
919	<	public void testSignalAll() {
920	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
919	>	public void testSignalAll() throws InterruptedException {
920	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
921		final Condition c = lock.writeLock().newCondition();
922	<	Thread t1 = new Thread(new Runnable() {
923	<	public void run() {
924	<	try {
925	<	lock.writeLock().lock();
926	<	c.await();
927	<	lock.writeLock().unlock();
928	<	}
929	<	catch(InterruptedException e) {
930	<	threadUnexpectedException();
931	<	}
932	<	}
933	<	});
934	<
935	<	Thread t2 = new Thread(new Runnable() {
936	<	public void run() {
937	<	try {
938	<	lock.writeLock().lock();
939	<	c.await();
940	<	lock.writeLock().unlock();
941	<	}
942	<	catch(InterruptedException e) {
943	<	threadUnexpectedException();
811	<	}
812	<	}
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	<	}
922	>	Thread t1 = newStartedThread(new CheckedRunnable() {
923	>	public void realRun() throws InterruptedException {
924	>	lock.writeLock().lock();
925	>	c.await();
926	>	lock.writeLock().unlock();
927	>	}});
928	>
929	>	Thread t2 = newStartedThread(new CheckedRunnable() {
930	>	public void realRun() throws InterruptedException {
931	>	lock.writeLock().lock();
932	>	c.await();
933	>	lock.writeLock().unlock();
934	>	}});
935	>
936	>	Thread.sleep(SHORT_DELAY_MS);
937	>	lock.writeLock().lock();
938	>	c.signalAll();
939	>	lock.writeLock().unlock();
940	>	t1.join(SHORT_DELAY_MS);
941	>	t2.join(SHORT_DELAY_MS);
942	>	assertFalse(t1.isAlive());
943	>	assertFalse(t2.isAlive());
944		}
945
946		/**
947		* A serialized lock deserializes as unlocked
948		*/
949	<	public void testSerialization() {
949	>	public void testSerialization() throws Exception {
950		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
951		l.readLock().lock();
952		l.readLock().unlock();
953
954	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
955	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
956	+	out.writeObject(l);
957	+	out.close();
958	+
959	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
960	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
961	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
962	+	r.readLock().lock();
963	+	r.readLock().unlock();
964	+	}
965	+
966	+	/**
967	+	* hasQueuedThreads reports whether there are waiting threads
968	+	*/
969	+	public void testhasQueuedThreads() throws InterruptedException {
970	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
971	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
972	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
973	+	assertFalse(lock.hasQueuedThreads());
974	+	lock.writeLock().lock();
975	+	t1.start();
976	+	Thread.sleep(SHORT_DELAY_MS);
977	+	assertTrue(lock.hasQueuedThreads());
978	+	t2.start();
979	+	Thread.sleep(SHORT_DELAY_MS);
980	+	assertTrue(lock.hasQueuedThreads());
981	+	t1.interrupt();
982	+	Thread.sleep(SHORT_DELAY_MS);
983	+	assertTrue(lock.hasQueuedThreads());
984	+	lock.writeLock().unlock();
985	+	Thread.sleep(SHORT_DELAY_MS);
986	+	assertFalse(lock.hasQueuedThreads());
987	+	t1.join();
988	+	t2.join();
989	+	}
990	+
991	+	/**
992	+	* hasQueuedThread(null) throws NPE
993	+	*/
994	+	public void testHasQueuedThreadNPE() {
995	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
996		try {
997	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
998	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
999	<	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	<	}
997	>	sync.hasQueuedThread(null);
998	>	shouldThrow();
999	>	} catch (NullPointerException success) {}
1000		}
1001
1002		/**
1003	+	* hasQueuedThread reports whether a thread is queued.
1004	+	*/
1005	+	public void testHasQueuedThread() throws InterruptedException {
1006	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1007	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1008	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1009	+	assertFalse(sync.hasQueuedThread(t1));
1010	+	assertFalse(sync.hasQueuedThread(t2));
1011	+	sync.writeLock().lock();
1012	+	t1.start();
1013	+	Thread.sleep(SHORT_DELAY_MS);
1014	+	assertTrue(sync.hasQueuedThread(t1));
1015	+	t2.start();
1016	+	Thread.sleep(SHORT_DELAY_MS);
1017	+	assertTrue(sync.hasQueuedThread(t1));
1018	+	assertTrue(sync.hasQueuedThread(t2));
1019	+	t1.interrupt();
1020	+	Thread.sleep(SHORT_DELAY_MS);
1021	+	assertFalse(sync.hasQueuedThread(t1));
1022	+	assertTrue(sync.hasQueuedThread(t2));
1023	+	sync.writeLock().unlock();
1024	+	Thread.sleep(SHORT_DELAY_MS);
1025	+	assertFalse(sync.hasQueuedThread(t1));
1026	+	Thread.sleep(SHORT_DELAY_MS);
1027	+	assertFalse(sync.hasQueuedThread(t2));
1028	+	t1.join();
1029	+	t2.join();
1030	+	}
1031	+
1032	+
1033	+	/**
1034		* getQueueLength reports number of waiting threads
1035		*/
1036	<	public void testGetQueueLength() {
1037	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1036	>	public void testGetQueueLength() throws InterruptedException {
1037	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1038		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1039		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1040	<	try {
1041	<	assertEquals(0, lock.getQueueLength());
1042	<	lock.writeLock().lock();
1043	<	t1.start();
1044	<	Thread.sleep(SHORT_DELAY_MS);
1045	<	assertEquals(1, lock.getQueueLength());
1046	<	t2.start();
1047	<	Thread.sleep(SHORT_DELAY_MS);
1048	<	assertEquals(2, lock.getQueueLength());
1049	<	t1.interrupt();
1050	<	Thread.sleep(SHORT_DELAY_MS);
1051	<	assertEquals(1, lock.getQueueLength());
1052	<	lock.writeLock().unlock();
1053	<	Thread.sleep(SHORT_DELAY_MS);
1054	<	assertEquals(0, lock.getQueueLength());
1055	<	t1.join();
1056	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1040	>	assertEquals(0, lock.getQueueLength());
1041	>	lock.writeLock().lock();
1042	>	t1.start();
1043	>	Thread.sleep(SHORT_DELAY_MS);
1044	>	assertEquals(1, lock.getQueueLength());
1045	>	t2.start();
1046	>	Thread.sleep(SHORT_DELAY_MS);
1047	>	assertEquals(2, lock.getQueueLength());
1048	>	t1.interrupt();
1049	>	Thread.sleep(SHORT_DELAY_MS);
1050	>	assertEquals(1, lock.getQueueLength());
1051	>	lock.writeLock().unlock();
1052	>	Thread.sleep(SHORT_DELAY_MS);
1053	>	assertEquals(0, lock.getQueueLength());
1054	>	t1.join();
1055	>	t2.join();
1056	>	}
1057
1058		/**
1059		* getQueuedThreads includes waiting threads
1060		*/
1061	<	public void testGetQueuedThreads() {
1062	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1061	>	public void testGetQueuedThreads() throws InterruptedException {
1062	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1063		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1064		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1065	+	assertTrue(lock.getQueuedThreads().isEmpty());
1066	+	lock.writeLock().lock();
1067	+	assertTrue(lock.getQueuedThreads().isEmpty());
1068	+	t1.start();
1069	+	Thread.sleep(SHORT_DELAY_MS);
1070	+	assertTrue(lock.getQueuedThreads().contains(t1));
1071	+	t2.start();
1072	+	Thread.sleep(SHORT_DELAY_MS);
1073	+	assertTrue(lock.getQueuedThreads().contains(t1));
1074	+	assertTrue(lock.getQueuedThreads().contains(t2));
1075	+	t1.interrupt();
1076	+	Thread.sleep(SHORT_DELAY_MS);
1077	+	assertFalse(lock.getQueuedThreads().contains(t1));
1078	+	assertTrue(lock.getQueuedThreads().contains(t2));
1079	+	lock.writeLock().unlock();
1080	+	Thread.sleep(SHORT_DELAY_MS);
1081	+	assertTrue(lock.getQueuedThreads().isEmpty());
1082	+	t1.join();
1083	+	t2.join();
1084	+	}
1085	+
1086	+	/**
1087	+	* hasWaiters throws NPE if null
1088	+	*/
1089	+	public void testHasWaitersNPE() {
1090	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1091		try {
1092	<	assertTrue(lock.getQueuedThreads().isEmpty());
1093	<	lock.writeLock().lock();
1094	<	assertTrue(lock.getQueuedThreads().isEmpty());
1095	<	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	<	}
1092	>	lock.hasWaiters(null);
1093	>	shouldThrow();
1094	>	} catch (NullPointerException success) {}
1095	>	}
1096
1097		/**
1098	<	* hasWaiters returns true when a thread is waiting, else false
1098	>	* getWaitQueueLength throws NPE if null
1099		*/
1100	<	public void testHasWaiters() {
1101	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1102	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1103	<	Thread t = new Thread(new Runnable() {
1104	<	public void run() {
1105	<	try {
1106	<	lock.writeLock().lock();
1107	<	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	<	});
1100	>	public void testGetWaitQueueLengthNPE() {
1101	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1102	>	try {
1103	>	lock.getWaitQueueLength(null);
1104	>	shouldThrow();
1105	>	} catch (NullPointerException success) {}
1106	>	}
1107	>
1108
1109	+	/**
1110	+	* getWaitingThreads throws NPE if null
1111	+	*/
1112	+	public void testGetWaitingThreadsNPE() {
1113	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1114		try {
1115	<	t.start();
1116	<	Thread.sleep(SHORT_DELAY_MS);
1117	<	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	<	}
1115	>	lock.getWaitingThreads(null);
1116	>	shouldThrow();
1117	>	} catch (NullPointerException success) {}
1118		}
1119
1120		/**
1121	<	* getWaitQueueLength returns number of waiting threads
1121	>	* hasWaiters throws IAE if not owned
1122		*/
1123	<	public void testGetWaitQueueLength() {
1124	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1125	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1126	<	Thread t1 = new Thread(new Runnable() {
1127	<	public void run() {
1128	<	try {
1129	<	lock.writeLock().lock();
1130	<	threadAssertFalse(c.hasWaiters());
1131	<	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	<	});
1123	>	public void testHasWaitersIAE() {
1124	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1125	>	final Condition c = lock.writeLock().newCondition();
1126	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1127	>	try {
1128	>	lock2.hasWaiters(c);
1129	>	shouldThrow();
1130	>	} catch (IllegalArgumentException success) {}
1131	>	}
1132
1133	+	/**
1134	+	* hasWaiters throws IMSE if not locked
1135	+	*/
1136	+	public void testHasWaitersIMSE() {
1137	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1138	+	final Condition c = lock.writeLock().newCondition();
1139		try {
1140	<	t1.start();
1141	<	Thread.sleep(SHORT_DELAY_MS);
1142	<	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	<	}
1140	>	lock.hasWaiters(c);
1141	>	shouldThrow();
1142	>	} catch (IllegalMonitorStateException success) {}
1143		}
1144
1145	+
1146		/**
1147	<	* getWaitingThreads returns only and all waiting threads
1147	>	* getWaitQueueLength throws IAE if not owned
1148		*/
1149	<	public void testGetWaitingThreads() {
1150	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1151	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1152	<	Thread t1 = new Thread(new Runnable() {
1153	<	public void run() {
1154	<	try {
1155	<	lock.writeLock().lock();
1156	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1157	<	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	<	});
1149	>	public void testGetWaitQueueLengthIAE() {
1150	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1151	>	final Condition c = lock.writeLock().newCondition();
1152	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1153	>	try {
1154	>	lock2.getWaitQueueLength(c);
1155	>	shouldThrow();
1156	>	} catch (IllegalArgumentException success) {}
1157	>	}
1158
1159	+	/**
1160	+	* getWaitQueueLength throws IMSE if not locked
1161	+	*/
1162	+	public void testGetWaitQueueLengthIMSE() {
1163	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1164	+	final Condition c = lock.writeLock().newCondition();
1165		try {
1166	<	lock.writeLock().lock();
1167	<	assertTrue(c.getWaitingThreads().isEmpty());
1168	<	lock.writeLock().unlock();
1169	<	t1.start();
1170	<	Thread.sleep(SHORT_DELAY_MS);
1171	<	t2.start();
1172	<	Thread.sleep(SHORT_DELAY_MS);
1173	<	lock.writeLock().lock();
1174	<	assertTrue(c.hasWaiters());
1175	<	assertTrue(c.getWaitingThreads().contains(t1));
1176	<	assertTrue(c.getWaitingThreads().contains(t2));
1177	<	c.signalAll();
1178	<	lock.writeLock().unlock();
1179	<	Thread.sleep(SHORT_DELAY_MS);
1180	<	lock.writeLock().lock();
1181	<	assertFalse(c.hasWaiters());
1182	<	assertTrue(c.getWaitingThreads().isEmpty());
1183	<	lock.writeLock().unlock();
1184	<	t1.join(SHORT_DELAY_MS);
1185	<	t2.join(SHORT_DELAY_MS);
1186	<	assertFalse(t1.isAlive());
1187	<	assertFalse(t2.isAlive());
1188	<	}
1189	<	catch (Exception ex) {
1190	<	unexpectedException();
1191	<	}
1166	>	lock.getWaitQueueLength(c);
1167	>	shouldThrow();
1168	>	} catch (IllegalMonitorStateException success) {}
1169	>	}
1170	>
1171	>
1172	>	/**
1173	>	* getWaitingThreads throws IAE if not owned
1174	>	*/
1175	>	public void testGetWaitingThreadsIAE() {
1176	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1177	>	final Condition c = lock.writeLock().newCondition();
1178	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1179	>	try {
1180	>	lock2.getWaitingThreads(c);
1181	>	shouldThrow();
1182	>	} catch (IllegalArgumentException success) {}
1183	>	}
1184	>
1185	>	/**
1186	>	* getWaitingThreads throws IMSE if not locked
1187	>	*/
1188	>	public void testGetWaitingThreadsIMSE() {
1189	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1190	>	final Condition c = lock.writeLock().newCondition();
1191	>	try {
1192	>	lock.getWaitingThreads(c);
1193	>	shouldThrow();
1194	>	} catch (IllegalMonitorStateException success) {}
1195	>	}
1196	>
1197	>
1198	>	/**
1199	>	* hasWaiters returns true when a thread is waiting, else false
1200	>	*/
1201	>	public void testHasWaiters() throws InterruptedException {
1202	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1203	>	final Condition c = lock.writeLock().newCondition();
1204	>	Thread t = newStartedThread(new CheckedRunnable() {
1205	>	public void realRun() throws InterruptedException {
1206	>	lock.writeLock().lock();
1207	>	assertFalse(lock.hasWaiters(c));
1208	>	assertEquals(0, lock.getWaitQueueLength(c));
1209	>	c.await();
1210	>	lock.writeLock().unlock();
1211	>	}});
1212	>
1213	>	Thread.sleep(SHORT_DELAY_MS);
1214	>	lock.writeLock().lock();
1215	>	assertTrue(lock.hasWaiters(c));
1216	>	assertEquals(1, lock.getWaitQueueLength(c));
1217	>	c.signal();
1218	>	lock.writeLock().unlock();
1219	>	Thread.sleep(SHORT_DELAY_MS);
1220	>	lock.writeLock().lock();
1221	>	assertFalse(lock.hasWaiters(c));
1222	>	assertEquals(0, lock.getWaitQueueLength(c));
1223	>	lock.writeLock().unlock();
1224	>	t.join(SHORT_DELAY_MS);
1225	>	assertFalse(t.isAlive());
1226	>	}
1227	>
1228	>	/**
1229	>	* getWaitQueueLength returns number of waiting threads
1230	>	*/
1231	>	public void testGetWaitQueueLength() throws InterruptedException {
1232	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1233	>	final Condition c = lock.writeLock().newCondition();
1234	>	Thread t = newStartedThread(new CheckedRunnable() {
1235	>	public void realRun() throws InterruptedException {
1236	>	lock.writeLock().lock();
1237	>	assertFalse(lock.hasWaiters(c));
1238	>	assertEquals(0, lock.getWaitQueueLength(c));
1239	>	c.await();
1240	>	lock.writeLock().unlock();
1241	>	}});
1242	>
1243	>	Thread.sleep(SHORT_DELAY_MS);
1244	>	lock.writeLock().lock();
1245	>	assertTrue(lock.hasWaiters(c));
1246	>	assertEquals(1, lock.getWaitQueueLength(c));
1247	>	c.signal();
1248	>	lock.writeLock().unlock();
1249	>	Thread.sleep(SHORT_DELAY_MS);
1250	>	lock.writeLock().lock();
1251	>	assertFalse(lock.hasWaiters(c));
1252	>	assertEquals(0, lock.getWaitQueueLength(c));
1253	>	lock.writeLock().unlock();
1254	>	t.join(SHORT_DELAY_MS);
1255	>	assertFalse(t.isAlive());
1256	>	}
1257	>
1258	>
1259	>	/**
1260	>	* getWaitingThreads returns only and all waiting threads
1261	>	*/
1262	>	public void testGetWaitingThreads() throws InterruptedException {
1263	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1264	>	final Condition c = lock.writeLock().newCondition();
1265	>	Thread t1 = new Thread(new CheckedRunnable() {
1266	>	public void realRun() throws InterruptedException {
1267	>	lock.writeLock().lock();
1268	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1269	>	c.await();
1270	>	lock.writeLock().unlock();
1271	>	}});
1272	>
1273	>	Thread t2 = new Thread(new CheckedRunnable() {
1274	>	public void realRun() throws InterruptedException {
1275	>	lock.writeLock().lock();
1276	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1277	>	c.await();
1278	>	lock.writeLock().unlock();
1279	>	}});
1280	>
1281	>	lock.writeLock().lock();
1282	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1283	>	lock.writeLock().unlock();
1284	>	t1.start();
1285	>	Thread.sleep(SHORT_DELAY_MS);
1286	>	t2.start();
1287	>	Thread.sleep(SHORT_DELAY_MS);
1288	>	lock.writeLock().lock();
1289	>	assertTrue(lock.hasWaiters(c));
1290	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1291	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1292	>	c.signalAll();
1293	>	lock.writeLock().unlock();
1294	>	Thread.sleep(SHORT_DELAY_MS);
1295	>	lock.writeLock().lock();
1296	>	assertFalse(lock.hasWaiters(c));
1297	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1298	>	lock.writeLock().unlock();
1299	>	t1.join(SHORT_DELAY_MS);
1300	>	t2.join(SHORT_DELAY_MS);
1301	>	assertFalse(t1.isAlive());
1302	>	assertFalse(t2.isAlive());
1303	>	}
1304	>
1305	>	/**
1306	>	* toString indicates current lock state
1307	>	*/
1308	>	public void testToString() {
1309	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1310	>	String us = lock.toString();
1311	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1312	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1313	>	lock.writeLock().lock();
1314	>	String ws = lock.toString();
1315	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1316	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1317	>	lock.writeLock().unlock();
1318	>	lock.readLock().lock();
1319	>	lock.readLock().lock();
1320	>	String rs = lock.toString();
1321	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1322	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1323	>	}
1324	>
1325	>	/**
1326	>	* readLock.toString indicates current lock state
1327	>	*/
1328	>	public void testReadLockToString() {
1329	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1330	>	String us = lock.readLock().toString();
1331	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1332	>	lock.readLock().lock();
1333	>	lock.readLock().lock();
1334	>	String rs = lock.readLock().toString();
1335	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1336	>	}
1337	>
1338	>	/**
1339	>	* writeLock.toString indicates current lock state
1340	>	*/
1341	>	public void testWriteLockToString() {
1342	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1343	>	String us = lock.writeLock().toString();
1344	>	assertTrue(us.indexOf("Unlocked") >= 0);
1345	>	lock.writeLock().lock();
1346	>	String ls = lock.writeLock().toString();
1347	>	assertTrue(ls.indexOf("Locked") >= 0);
1348		}
1349
1350		}

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