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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.11 by dl, Sat Dec 27 18:27:02 2003 UTC vs.
Revision 1.48 by jsr166, Mon May 2 00:06:45 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 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 99 | 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 122 | 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--) {
149	<	lock.writeLock().unlock();
150	<	assertEquals(i-1,lock.getWriteHoldCount());
151	<	}
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	>	assertEquals(i-1,lock.getWriteHoldCount());
151	>	}
152		}
136	–
153
154		/**
155	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
155	>	* WriteLock.getHoldCount returns number of recursive holds
156		*/
157	<	public void testUnlock_IllegalMonitorStateException() {
158	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
159	<	try {
160	<	rl.writeLock().unlock();
161	<	shouldThrow();
162	<	} catch(IllegalMonitorStateException success){}
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	>	assertEquals(i-1,lock.writeLock().getHoldCount());
166	>	}
167		}
168
149	–
169		/**
170	<	* write-lockInterruptibly is interruptible
170	>	* getReadHoldCount returns number of recursive holds
171		*/
172	<	public void testWriteLockInterruptibly_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.writeLock().lockInterruptibly();
179	<	threadShouldThrow();
180	<	} catch(InterruptedException success){}
162	<	}
163	<	});
164	<	try {
165	<	t.start();
166	<	t.interrupt();
167	<	lock.writeLock().unlock();
168	<	t.join();
169	<	} catch(Exception e){
170	<	unexpectedException();
171	<	}
172	<	}
173	<
174	<	/**
175	<	* timed write-trylock is interruptible
176	<	*/
177	<	public void testWriteTryLock_Interrupted() {
178	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
179	<	lock.writeLock().lock();
180	<	Thread t = new Thread(new Runnable() {
181	<	public void run() {
182	<	try {
183	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
184	<	threadShouldThrow();
185	<	} catch(InterruptedException success){}
186	<	}
187	<	});
188	<	try {
189	<	t.start();
190	<	t.interrupt();
191	<	lock.writeLock().unlock();
192	<	t.join();
193	<	} catch(Exception e){
194	<	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		}
183
184	+
185		/**
186	<	* read-lockInterruptibly is interruptible
186	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
187		*/
188	<	public void testReadLockInterruptibly_Interrupted() {
189	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	<	lock.writeLock().lock();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run() {
206	<	try {
207	<	lock.readLock().lockInterruptibly();
208	<	threadShouldThrow();
209	<	} catch(InterruptedException success){}
210	<	}
211	<	});
188	>	public void testUnlock_IllegalMonitorStateException() {
189	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
190		try {
191	<	t.start();
192	<	t.interrupt();
193	<	lock.writeLock().unlock();
216	<	t.join();
217	<	} catch(Exception e){
218	<	unexpectedException();
219	<	}
220	<	}
221	<
222	<	/**
223	<	* timed read-trylock is interruptible
224	<	*/
225	<	public void testReadTryLock_Interrupted() {
226	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
227	<	lock.writeLock().lock();
228	<	Thread t = new Thread(new Runnable() {
229	<	public void run() {
230	<	try {
231	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
232	<	threadShouldThrow();
233	<	} catch(InterruptedException success){}
234	<	}
235	<	});
236	<	try {
237	<	t.start();
238	<	t.interrupt();
239	<	t.join();
240	<	} catch(Exception e){
241	<	unexpectedException();
242	<	}
191	>	rl.writeLock().unlock();
192	>	shouldThrow();
193	>	} catch (IllegalMonitorStateException success) {}
194		}
195
245	–
246	–	/**
247	–	* write-trylock fails if locked
248	–	*/
249	–	public void testWriteTryLockWhenLocked() {
250	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	–	lock.writeLock().lock();
252	–	Thread t = new Thread(new Runnable() {
253	–	public void run() {
254	–	threadAssertFalse(lock.writeLock().tryLock());
255	–	}
256	–	});
257	–	try {
258	–	t.start();
259	–	t.join();
260	–	lock.writeLock().unlock();
261	–	} catch(Exception e){
262	–	unexpectedException();
263	–	}
264	–	}
196
197		/**
198	<	* read-trylock fails if locked
198	>	* write-lockInterruptibly is interruptible
199		*/
200	<	public void testReadTryLockWhenLocked() {
201	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	lock.writeLock().lock();
203	<	Thread t = new Thread(new Runnable() {
204	<	public void run() {
205	<	threadAssertFalse(lock.readLock().tryLock());
206	<	}
207	<	});
208	<	try {
209	<	t.start();
210	<	t.join();
211	<	lock.writeLock().unlock();
212	<	} catch(Exception e){
282	<	unexpectedException();
283	<	}
284	<	}
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	<	* Multiple threads can hold a read lock when not write-locked
215	>	* timed write-tryLock is interruptible
216		*/
217	<	public void testMultipleReadLocks() {
218	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	<	lock.readLock().lock();
220	<	Thread t = new Thread(new Runnable() {
221	<	public void run() {
222	<	threadAssertTrue(lock.readLock().tryLock());
223	<	lock.readLock().unlock();
224	<	}
225	<	});
226	<	try {
227	<	t.start();
228	<	t.join();
229	<	lock.readLock().unlock();
302	<	} catch(Exception e){
303	<	unexpectedException();
304	<	}
305	<	}
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	<	* A writelock succeeds after reading threads unlock
232	>	* read-lockInterruptibly is interruptible
233		*/
234	<	public void testWriteAfterMultipleReadLocks() {
235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	<	lock.readLock().lock();
237	<	Thread t1 = new Thread(new Runnable() {
238	<	public void run() {
239	<	lock.readLock().lock();
240	<	lock.readLock().unlock();
241	<	}
242	<	});
243	<	Thread t2 = new Thread(new Runnable() {
244	<	public void run() {
245	<	lock.writeLock().lock();
246	<	lock.writeLock().unlock();
323	<	}
324	<	});
325	<
326	<	try {
327	<	t1.start();
328	<	t2.start();
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	<	} catch(Exception e){
337	<	unexpectedException();
338	<	}
339	<	}
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	<	* Readlocks succeed after a writing thread unlocks
249	>	* timed read-tryLock is interruptible
250		*/
251	<	public void testReadAfterWriteLock() {
252	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
253	<	lock.writeLock().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.readLock().lock();
356	<	lock.readLock().unlock();
357	<	}
358	<	});
359	<
360	<	try {
361	<	t1.start();
362	<	t2.start();
363	<	Thread.sleep(SHORT_DELAY_MS);
364	<	lock.writeLock().unlock();
365	<	t1.join(MEDIUM_DELAY_MS);
366	<	t2.join(MEDIUM_DELAY_MS);
367	<	assertTrue(!t1.isAlive());
368	<	assertTrue(!t2.isAlive());
369	<
370	<	} catch(Exception e){
371	<	unexpectedException();
372	<	}
373	<	}
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	>	}
263
264
265		/**
266	<	* Read trylock succeeds if readlocked but not writelocked
267	<	*/
268	<	public void testTryLockWhenReadLocked() {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	lock.readLock().lock();
271	<	Thread t = new Thread(new Runnable() {
272	<	public void run() {
273	<	threadAssertTrue(lock.readLock().tryLock());
274	<	lock.readLock().unlock();
386	<	}
387	<	});
388	<	try {
389	<	t.start();
390	<	t.join();
391	<	lock.readLock().unlock();
392	<	} catch(Exception e){
393	<	unexpectedException();
394	<	}
395	<	}
266	>	* write-tryLock fails if locked
267	>	*/
268	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	>	lock.writeLock().lock();
271	>	Thread t = newStartedThread(new CheckedRunnable() {
272	>	public void realRun() {
273	>	assertFalse(lock.writeLock().tryLock());
274	>	}});
275
276	<
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	<	}
409	<	});
410	<	try {
411	<	t.start();
412	<	t.join();
413	<	lock.readLock().unlock();
414	<	} catch(Exception e){
415	<	unexpectedException();
416	<	}
417	<	}
283	>	public void testReadTryLockWhenLocked() throws InterruptedException {
284	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
285	>	lock.writeLock().lock();
286	>	Thread t = newStartedThread(new CheckedRunnable() {
287	>	public void realRun() {
288	>	assertFalse(lock.readLock().tryLock());
289	>	}});
290
291	<
291	>	t.join();
292	>	lock.writeLock().unlock();
293	>	}
294
295		/**
296	<	* write timed trylock times out if locked
297	<	*/
298	<	public void testWriteTryLock_Timeout() {
299	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
300	<	lock.writeLock().lock();
301	<	Thread t = new Thread(new Runnable() {
302	<	public void run() {
303	<	try {
304	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
305	<	} catch (Exception ex) {
306	<	threadUnexpectedException();
307	<	}
308	<	}
309	<	});
436	<	try {
437	<	t.start();
438	<	t.join();
439	<	lock.writeLock().unlock();
440	<	} catch(Exception e){
441	<	unexpectedException();
442	<	}
443	<	}
296	>	* Multiple threads can hold a read lock when not write-locked
297	>	*/
298	>	public void testMultipleReadLocks() throws InterruptedException {
299	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
300	>	lock.readLock().lock();
301	>	Thread t = newStartedThread(new CheckedRunnable() {
302	>	public void realRun() {
303	>	assertTrue(lock.readLock().tryLock());
304	>	lock.readLock().unlock();
305	>	}});
306	>
307	>	t.join();
308	>	lock.readLock().unlock();
309	>	}
310
311		/**
312	<	* read timed trylock times out if write-locked
312	>	* A writelock succeeds after reading threads unlock
313		*/
314	<	public void testReadTryLock_Timeout() {
315	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
316	<	lock.writeLock().lock();
317	<	Thread t = new Thread(new Runnable() {
318	<	public void run() {
319	<	try {
320	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
321	<	} catch (Exception ex) {
322	<	threadUnexpectedException();
323	<	}
324	<	}
325	<	});
326	<	try {
327	<	t.start();
328	<	t.join();
329	<	lock.writeLock().unlock();
330	<	} catch(Exception e){
331	<	unexpectedException();
332	<	}
333	<	}
314	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
315	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
316	>	lock.readLock().lock();
317	>	Thread t1 = newStartedThread(new CheckedRunnable() {
318	>	public void realRun() {
319	>	lock.readLock().lock();
320	>	lock.readLock().unlock();
321	>	}});
322	>	Thread t2 = newStartedThread(new CheckedRunnable() {
323	>	public void realRun() {
324	>	lock.writeLock().lock();
325	>	lock.writeLock().unlock();
326	>	}});
327	>
328	>	Thread.sleep(SHORT_DELAY_MS);
329	>	lock.readLock().unlock();
330	>	t1.join(MEDIUM_DELAY_MS);
331	>	t2.join(MEDIUM_DELAY_MS);
332	>	assertTrue(!t1.isAlive());
333	>	assertTrue(!t2.isAlive());
334	>	}
335	>
336	>	/**
337	>	* Readlocks succeed after a writing thread unlocks
338	>	*/
339	>	public void testReadAfterWriteLock() throws InterruptedException {
340	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
341	>	lock.writeLock().lock();
342	>	Thread t1 = newStartedThread(new CheckedRunnable() {
343	>	public void realRun() {
344	>	lock.readLock().lock();
345	>	lock.readLock().unlock();
346	>	}});
347	>	Thread t2 = newStartedThread(new CheckedRunnable() {
348	>	public void realRun() {
349	>	lock.readLock().lock();
350	>	lock.readLock().unlock();
351	>	}});
352	>
353	>	Thread.sleep(SHORT_DELAY_MS);
354	>	lock.writeLock().unlock();
355	>	t1.join(MEDIUM_DELAY_MS);
356	>	t2.join(MEDIUM_DELAY_MS);
357	>	assertTrue(!t1.isAlive());
358	>	assertTrue(!t2.isAlive());
359	>	}
360	>
361	>	/**
362	>	* Read trylock succeeds if write locked by current thread
363	>	*/
364	>	public void testReadHoldingWriteLock() {
365	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
366	>	lock.writeLock().lock();
367	>	assertTrue(lock.readLock().tryLock());
368	>	lock.readLock().unlock();
369	>	lock.writeLock().unlock();
370	>	}
371	>
372	>	/**
373	>	* Read lock succeeds if write locked by current thread even if
374	>	* other threads are waiting for readlock
375	>	*/
376	>	public void testReadHoldingWriteLock2() throws InterruptedException {
377	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
378	>	lock.writeLock().lock();
379	>	Thread t1 = newStartedThread(new CheckedRunnable() {
380	>	public void realRun() {
381	>	lock.readLock().lock();
382	>	lock.readLock().unlock();
383	>	}});
384	>	Thread t2 = newStartedThread(new CheckedRunnable() {
385	>	public void realRun() {
386	>	lock.readLock().lock();
387	>	lock.readLock().unlock();
388	>	}});
389	>
390	>	lock.readLock().lock();
391	>	lock.readLock().unlock();
392	>	Thread.sleep(SHORT_DELAY_MS);
393	>	lock.readLock().lock();
394	>	lock.readLock().unlock();
395	>	lock.writeLock().unlock();
396	>	t1.join(MEDIUM_DELAY_MS);
397	>	t2.join(MEDIUM_DELAY_MS);
398	>	assertTrue(!t1.isAlive());
399	>	assertTrue(!t2.isAlive());
400	>	}
401	>
402	>	/**
403	>	* Read lock succeeds if write locked by current thread even if
404	>	* other threads are waiting for writelock
405	>	*/
406	>	public void testReadHoldingWriteLock3() throws InterruptedException {
407	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
408	>	lock.writeLock().lock();
409	>	Thread t1 = newStartedThread(new CheckedRunnable() {
410	>	public void realRun() {
411	>	lock.writeLock().lock();
412	>	lock.writeLock().unlock();
413	>	}});
414	>	Thread t2 = newStartedThread(new CheckedRunnable() {
415	>	public void realRun() {
416	>	lock.writeLock().lock();
417	>	lock.writeLock().unlock();
418	>	}});
419	>
420	>	lock.readLock().lock();
421	>	lock.readLock().unlock();
422	>	Thread.sleep(SHORT_DELAY_MS);
423	>	lock.readLock().lock();
424	>	lock.readLock().unlock();
425	>	lock.writeLock().unlock();
426	>	t1.join(MEDIUM_DELAY_MS);
427	>	t2.join(MEDIUM_DELAY_MS);
428	>	assertTrue(!t1.isAlive());
429	>	assertTrue(!t2.isAlive());
430	>	}
431	>
432	>
433	>	/**
434	>	* Write lock succeeds if write locked by current thread even if
435	>	* other threads are waiting for writelock
436	>	*/
437	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
438	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
439	>	lock.writeLock().lock();
440	>	Thread t1 = newStartedThread(new CheckedRunnable() {
441	>	public void realRun() {
442	>	lock.writeLock().lock();
443	>	lock.writeLock().unlock();
444	>	}});
445	>	Thread t2 = newStartedThread(new CheckedRunnable() {
446	>	public void realRun() {
447	>	lock.writeLock().lock();
448	>	lock.writeLock().unlock();
449	>	}});
450	>
451	>	lock.writeLock().lock();
452	>	lock.writeLock().unlock();
453	>	Thread.sleep(SHORT_DELAY_MS);
454	>	lock.writeLock().lock();
455	>	lock.writeLock().unlock();
456	>	lock.writeLock().unlock();
457	>	t1.join(MEDIUM_DELAY_MS);
458	>	t2.join(MEDIUM_DELAY_MS);
459	>	assertTrue(!t1.isAlive());
460	>	assertTrue(!t2.isAlive());
461	>	}
462	>
463	>
464	>	/**
465	>	* Fair Read trylock succeeds if write locked by current thread
466	>	*/
467	>	public void testReadHoldingWriteLockFair() {
468	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
469	>	lock.writeLock().lock();
470	>	assertTrue(lock.readLock().tryLock());
471	>	lock.readLock().unlock();
472	>	lock.writeLock().unlock();
473	>	}
474	>
475	>	/**
476	>	* Fair Read lock succeeds if write locked by current thread even if
477	>	* other threads are waiting for readlock
478	>	*/
479	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
480	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
481	>	lock.writeLock().lock();
482	>	Thread t1 = newStartedThread(new CheckedRunnable() {
483	>	public void realRun() {
484	>	lock.readLock().lock();
485	>	lock.readLock().unlock();
486	>	}});
487	>	Thread t2 = newStartedThread(new CheckedRunnable() {
488	>	public void realRun() {
489	>	lock.readLock().lock();
490	>	lock.readLock().unlock();
491	>	}});
492	>
493	>	lock.readLock().lock();
494	>	lock.readLock().unlock();
495	>	Thread.sleep(SHORT_DELAY_MS);
496	>	lock.readLock().lock();
497	>	lock.readLock().unlock();
498	>	lock.writeLock().unlock();
499	>	t1.join(MEDIUM_DELAY_MS);
500	>	t2.join(MEDIUM_DELAY_MS);
501	>	assertTrue(!t1.isAlive());
502	>	assertTrue(!t2.isAlive());
503	>	}
504	>
505	>
506	>	/**
507	>	* Fair Read lock succeeds if write locked by current thread even if
508	>	* other threads are waiting for writelock
509	>	*/
510	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
511	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
512	>	lock.writeLock().lock();
513	>	Thread t1 = newStartedThread(new CheckedRunnable() {
514	>	public void realRun() {
515	>	lock.writeLock().lock();
516	>	lock.writeLock().unlock();
517	>	}});
518	>	Thread t2 = newStartedThread(new CheckedRunnable() {
519	>	public void realRun() {
520	>	lock.writeLock().lock();
521	>	lock.writeLock().unlock();
522	>	}});
523	>
524	>	lock.readLock().lock();
525	>	lock.readLock().unlock();
526	>	Thread.sleep(SHORT_DELAY_MS);
527	>	lock.readLock().lock();
528	>	lock.readLock().unlock();
529	>	lock.writeLock().unlock();
530	>	t1.join(MEDIUM_DELAY_MS);
531	>	t2.join(MEDIUM_DELAY_MS);
532	>	assertTrue(!t1.isAlive());
533	>	assertTrue(!t2.isAlive());
534	>	}
535	>
536	>
537	>	/**
538	>	* Fair Write lock succeeds if write locked by current thread even if
539	>	* other threads are waiting for writelock
540	>	*/
541	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
542	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
543	>	lock.writeLock().lock();
544	>	Thread t1 = newStartedThread(new CheckedRunnable() {
545	>	public void realRun() {
546	>	lock.writeLock().lock();
547	>	lock.writeLock().unlock();
548	>	}});
549	>	Thread t2 = newStartedThread(new CheckedRunnable() {
550	>	public void realRun() {
551	>	lock.writeLock().lock();
552	>	lock.writeLock().unlock();
553	>	}});
554	>
555	>	Thread.sleep(SHORT_DELAY_MS);
556	>	assertTrue(lock.isWriteLockedByCurrentThread());
557	>	assertEquals(1, lock.getWriteHoldCount());
558	>	lock.writeLock().lock();
559	>	assertEquals(2, lock.getWriteHoldCount());
560	>	lock.writeLock().unlock();
561	>	lock.writeLock().lock();
562	>	lock.writeLock().unlock();
563	>	lock.writeLock().unlock();
564	>	t1.join(MEDIUM_DELAY_MS);
565	>	t2.join(MEDIUM_DELAY_MS);
566	>	assertTrue(!t1.isAlive());
567	>	assertTrue(!t2.isAlive());
568	>	}
569	>
570	>
571	>	/**
572	>	* Read tryLock succeeds if readlocked but not writelocked
573	>	*/
574	>	public void testTryLockWhenReadLocked() throws InterruptedException {
575	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
576	>	lock.readLock().lock();
577	>	Thread t = newStartedThread(new CheckedRunnable() {
578	>	public void realRun() {
579	>	assertTrue(lock.readLock().tryLock());
580	>	lock.readLock().unlock();
581	>	}});
582	>
583	>	t.join();
584	>	lock.readLock().unlock();
585	>	}
586	>
587	>	/**
588	>	* write tryLock fails when readlocked
589	>	*/
590	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
591	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
592	>	lock.readLock().lock();
593	>	Thread t = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() {
595	>	assertFalse(lock.writeLock().tryLock());
596	>	}});
597	>
598	>	t.join();
599	>	lock.readLock().unlock();
600	>	}
601	>
602	>
603	>	/**
604	>	* Fair Read tryLock succeeds if readlocked but not writelocked
605	>	*/
606	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
607	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
608	>	lock.readLock().lock();
609	>	Thread t = newStartedThread(new CheckedRunnable() {
610	>	public void realRun() {
611	>	assertTrue(lock.readLock().tryLock());
612	>	lock.readLock().unlock();
613	>	}});
614	>
615	>	t.join();
616	>	lock.readLock().unlock();
617	>	}
618	>
619	>
620	>
621	>	/**
622	>	* Fair write tryLock fails when readlocked
623	>	*/
624	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
625	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
626	>	lock.readLock().lock();
627	>	Thread t = newStartedThread(new CheckedRunnable() {
628	>	public void realRun() {
629	>	assertFalse(lock.writeLock().tryLock());
630	>	}});
631	>
632	>	t.join();
633	>	lock.readLock().unlock();
634	>	}
635	>
636	>
637	>
638	>	/**
639	>	* write timed tryLock times out if locked
640	>	*/
641	>	public void testWriteTryLock_Timeout() throws InterruptedException {
642	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643	>	lock.writeLock().lock();
644	>	Thread t = newStartedThread(new CheckedRunnable() {
645	>	public void realRun() throws InterruptedException {
646	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
647	>	}});
648	>
649	>	t.join();
650	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
651	>	lock.writeLock().unlock();
652	>	}
653	>
654	>	/**
655	>	* read timed tryLock times out if write-locked
656	>	*/
657	>	public void testReadTryLock_Timeout() throws InterruptedException {
658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
659	>	lock.writeLock().lock();
660	>	Thread t = newStartedThread(new CheckedRunnable() {
661	>	public void realRun() throws InterruptedException {
662	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
663	>	}});
664	>
665	>	t.join();
666	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
667	>	lock.writeLock().unlock();
668	>	}
669
670
671		/**
672		* write lockInterruptibly succeeds if lock free else is interruptible
673		*/
674	<	public void testWriteLockInterruptibly() {
675	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
676	<	try {
677	<	lock.writeLock().lockInterruptibly();
678	<	} catch(Exception e) {
679	<	unexpectedException();
680	<	}
681	<	Thread t = new Thread(new Runnable() {
682	<	public void run() {
683	<	try {
684	<	lock.writeLock().lockInterruptibly();
685	<	threadShouldThrow();
686	<	}
486	<	catch(InterruptedException success) {
487	<	}
488	<	}
489	<	});
490	<	try {
491	<	t.start();
492	<	t.interrupt();
493	<	t.join();
494	<	lock.writeLock().unlock();
495	<	} catch(Exception e){
496	<	unexpectedException();
497	<	}
674	>	public void testWriteLockInterruptibly() throws InterruptedException {
675	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
676	>	lock.writeLock().lockInterruptibly();
677	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
678	>	public void realRun() throws InterruptedException {
679	>	lock.writeLock().lockInterruptibly();
680	>	}});
681	>
682	>	Thread.sleep(SHORT_DELAY_MS);
683	>	t.interrupt();
684	>	Thread.sleep(SHORT_DELAY_MS);
685	>	t.join();
686	>	lock.writeLock().unlock();
687		}
688
689		/**
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();
515	<	}
516	<	catch(InterruptedException success) {
517	<	}
518	<	}
519	<	});
520	<	try {
521	<	t.start();
522	<	t.interrupt();
523	<	t.join();
524	<	lock.writeLock().unlock();
525	<	} catch(Exception e){
526	<	unexpectedException();
527	<	}
690	>	* read lockInterruptibly succeeds if lock free else is interruptible
691	>	*/
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	>	lock.writeLock().unlock();
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	<	}
540	<	catch (IllegalMonitorStateException success) {
541	<	}
542	<	catch (Exception ex) {
543	<	shouldThrow();
544	<	}
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	<	}
557	<	catch (IllegalMonitorStateException success) {
558	<	}
559	<	catch (Exception ex) {
560	<	unexpectedException();
561	<	}
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();
575	<	}
576	<	catch (Exception ex) {
577	<	unexpectedException();
578	<	}
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));
591	<	lock.writeLock().unlock();
592	<	}
593	<	catch (Exception ex) {
594	<	unexpectedException();
595	<	}
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)));
608	<	lock.writeLock().unlock();
609	<	}
610	<	catch (Exception ex) {
611	<	unexpectedException();
612	<	}
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	>	while (!canAwake) {
807	>	c.awaitUninterruptibly();
808	>	}
809
810	<	try {
811	<	t.start();
636	<	Thread.sleep(SHORT_DELAY_MS);
637	<	lock.writeLock().lock();
638	<	c.signal();
639	<	lock.writeLock().unlock();
640	<	t.join(SHORT_DELAY_MS);
641	<	assertFalse(t.isAlive());
642	<	}
643	<	catch (Exception ex) {
644	<	unexpectedException();
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();
657	<	c.awaitUninterruptibly();
658	<	lock.writeLock().unlock();
659	<	}
660	<	});
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);
665	<	t.interrupt();
666	<	lock.writeLock().lock();
831	>	thread.interrupt();
832	>	thread.canAwake = true;
833		c.signal();
834	+	} finally {
835		lock.writeLock().unlock();
669	–	assert(t.isInterrupted());
670	–	t.join(SHORT_DELAY_MS);
671	–	assertFalse(t.isAlive());
672	–	}
673	–	catch (Exception ex) {
674	–	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	<	}
695	<	});
696	<
697	<	try {
698	<	t.start();
699	<	Thread.sleep(SHORT_DELAY_MS);
700	<	t.interrupt();
701	<	t.join(SHORT_DELAY_MS);
702	<	assertFalse(t.isAlive());
703	<	}
704	<	catch (Exception ex) {
705	<	unexpectedException();
706	<	}
849	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
850	>	public void realRun() throws InterruptedException {
851	>	lock.writeLock().lock();
852	>	c.await();
853	>	lock.writeLock().unlock();
854	>	}});
855	>
856	>	Thread.sleep(SHORT_DELAY_MS);
857	>	t.interrupt();
858	>	t.join(SHORT_DELAY_MS);
859	>	assertFalse(t.isAlive());
860		}
861
862		/**
863		* awaitNanos is interruptible
864		*/
865	<	public void testAwaitNanos_Interrupt() {
866	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
865	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
866	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
867		final Condition c = lock.writeLock().newCondition();
868	<	Thread t = new Thread(new Runnable() {
869	<	public void run() {
870	<	try {
871	<	lock.writeLock().lock();
872	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
873	<	lock.writeLock().unlock();
874	<	threadShouldThrow();
875	<	}
876	<	catch(InterruptedException success) {
877	<	}
878	<	}
726	<	});
727	<
728	<	try {
729	<	t.start();
730	<	Thread.sleep(SHORT_DELAY_MS);
731	<	t.interrupt();
732	<	t.join(SHORT_DELAY_MS);
733	<	assertFalse(t.isAlive());
734	<	}
735	<	catch (Exception ex) {
736	<	unexpectedException();
737	<	}
868	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
869	>	public void realRun() throws InterruptedException {
870	>	lock.writeLock().lock();
871	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
872	>	lock.writeLock().unlock();
873	>	}});
874	>
875	>	Thread.sleep(SHORT_DELAY_MS);
876	>	t.interrupt();
877	>	t.join(SHORT_DELAY_MS);
878	>	assertFalse(t.isAlive());
879		}
880
881		/**
882		* awaitUntil is interruptible
883		*/
884	<	public void testAwaitUntil_Interrupt() {
885	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
884	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
885	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
886		final Condition c = lock.writeLock().newCondition();
887	<	Thread t = new Thread(new Runnable() {
888	<	public void run() {
889	<	try {
890	<	lock.writeLock().lock();
891	<	java.util.Date d = new java.util.Date();
892	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
893	<	lock.writeLock().unlock();
894	<	threadShouldThrow();
895	<	}
896	<	catch(InterruptedException success) {
897	<	}
898	<	}
758	<	});
759	<
760	<	try {
761	<	t.start();
762	<	Thread.sleep(SHORT_DELAY_MS);
763	<	t.interrupt();
764	<	t.join(SHORT_DELAY_MS);
765	<	assertFalse(t.isAlive());
766	<	}
767	<	catch (Exception ex) {
768	<	unexpectedException();
769	<	}
887	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
888	>	public void realRun() throws InterruptedException {
889	>	lock.writeLock().lock();
890	>	java.util.Date d = new java.util.Date();
891	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
892	>	lock.writeLock().unlock();
893	>	}});
894	>
895	>	Thread.sleep(SHORT_DELAY_MS);
896	>	t.interrupt();
897	>	t.join(SHORT_DELAY_MS);
898	>	assertFalse(t.isAlive());
899		}
900
901		/**
902		* signalAll wakes up all threads
903		*/
904	<	public void testSignalAll() {
905	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904	>	public void testSignalAll() throws InterruptedException {
905	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
906		final Condition c = lock.writeLock().newCondition();
907	<	Thread t1 = new Thread(new Runnable() {
908	<	public void run() {
909	<	try {
910	<	lock.writeLock().lock();
911	<	c.await();
912	<	lock.writeLock().unlock();
913	<	}
914	<	catch(InterruptedException e) {
915	<	threadUnexpectedException();
916	<	}
917	<	}
918	<	});
919	<
920	<	Thread t2 = new Thread(new Runnable() {
921	<	public void run() {
922	<	try {
923	<	lock.writeLock().lock();
924	<	c.await();
925	<	lock.writeLock().unlock();
926	<	}
927	<	catch(InterruptedException e) {
928	<	threadUnexpectedException();
800	<	}
801	<	}
802	<	});
803	<
804	<	try {
805	<	t1.start();
806	<	t2.start();
807	<	Thread.sleep(SHORT_DELAY_MS);
808	<	lock.writeLock().lock();
809	<	c.signalAll();
810	<	lock.writeLock().unlock();
811	<	t1.join(SHORT_DELAY_MS);
812	<	t2.join(SHORT_DELAY_MS);
813	<	assertFalse(t1.isAlive());
814	<	assertFalse(t2.isAlive());
815	<	}
816	<	catch (Exception ex) {
817	<	unexpectedException();
818	<	}
907	>	Thread t1 = newStartedThread(new CheckedRunnable() {
908	>	public void realRun() throws InterruptedException {
909	>	lock.writeLock().lock();
910	>	c.await();
911	>	lock.writeLock().unlock();
912	>	}});
913	>
914	>	Thread t2 = newStartedThread(new CheckedRunnable() {
915	>	public void realRun() throws InterruptedException {
916	>	lock.writeLock().lock();
917	>	c.await();
918	>	lock.writeLock().unlock();
919	>	}});
920	>
921	>	Thread.sleep(SHORT_DELAY_MS);
922	>	lock.writeLock().lock();
923	>	c.signalAll();
924	>	lock.writeLock().unlock();
925	>	t1.join(SHORT_DELAY_MS);
926	>	t2.join(SHORT_DELAY_MS);
927	>	assertFalse(t1.isAlive());
928	>	assertFalse(t2.isAlive());
929		}
930
931		/**
932		* A serialized lock deserializes as unlocked
933		*/
934	<	public void testSerialization() {
934	>	public void testSerialization() throws Exception {
935		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
936		l.readLock().lock();
937		l.readLock().unlock();
938
939	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
940	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
941	+	out.writeObject(l);
942	+	out.close();
943	+
944	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
945	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
946	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
947	+	r.readLock().lock();
948	+	r.readLock().unlock();
949	+	}
950	+
951	+	/**
952	+	* hasQueuedThreads reports whether there are waiting threads
953	+	*/
954	+	public void testhasQueuedThreads() throws InterruptedException {
955	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
956	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
957	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
958	+	assertFalse(lock.hasQueuedThreads());
959	+	lock.writeLock().lock();
960	+	t1.start();
961	+	Thread.sleep(SHORT_DELAY_MS);
962	+	assertTrue(lock.hasQueuedThreads());
963	+	t2.start();
964	+	Thread.sleep(SHORT_DELAY_MS);
965	+	assertTrue(lock.hasQueuedThreads());
966	+	t1.interrupt();
967	+	Thread.sleep(SHORT_DELAY_MS);
968	+	assertTrue(lock.hasQueuedThreads());
969	+	lock.writeLock().unlock();
970	+	Thread.sleep(SHORT_DELAY_MS);
971	+	assertFalse(lock.hasQueuedThreads());
972	+	t1.join();
973	+	t2.join();
974	+	}
975	+
976	+	/**
977	+	* hasQueuedThread(null) throws NPE
978	+	*/
979	+	public void testHasQueuedThreadNPE() {
980	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
981		try {
982	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
983	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
984	<	out.writeObject(l);
985	<	out.close();
986	<
987	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
988	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
989	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
990	<	r.readLock().lock();
991	<	r.readLock().unlock();
992	<	} catch(Exception e){
993	<	e.printStackTrace();
994	<	unexpectedException();
995	<	}
982	>	sync.hasQueuedThread(null);
983	>	shouldThrow();
984	>	} catch (NullPointerException success) {}
985	>	}
986	>
987	>	/**
988	>	* hasQueuedThread reports whether a thread is queued.
989	>	*/
990	>	public void testHasQueuedThread() throws InterruptedException {
991	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
992	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
993	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
994	>	assertFalse(sync.hasQueuedThread(t1));
995	>	assertFalse(sync.hasQueuedThread(t2));
996	>	sync.writeLock().lock();
997	>	t1.start();
998	>	Thread.sleep(SHORT_DELAY_MS);
999	>	assertTrue(sync.hasQueuedThread(t1));
1000	>	t2.start();
1001	>	Thread.sleep(SHORT_DELAY_MS);
1002	>	assertTrue(sync.hasQueuedThread(t1));
1003	>	assertTrue(sync.hasQueuedThread(t2));
1004	>	t1.interrupt();
1005	>	Thread.sleep(SHORT_DELAY_MS);
1006	>	assertFalse(sync.hasQueuedThread(t1));
1007	>	assertTrue(sync.hasQueuedThread(t2));
1008	>	sync.writeLock().unlock();
1009	>	Thread.sleep(SHORT_DELAY_MS);
1010	>	assertFalse(sync.hasQueuedThread(t1));
1011	>	Thread.sleep(SHORT_DELAY_MS);
1012	>	assertFalse(sync.hasQueuedThread(t2));
1013	>	t1.join();
1014	>	t2.join();
1015		}
1016
1017	+
1018		/**
1019		* getQueueLength reports number of waiting threads
1020		*/
1021	<	public void testGetQueueLength() {
1022	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1021	>	public void testGetQueueLength() throws InterruptedException {
1022	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1023		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1024		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1025	<	try {
1026	<	assertEquals(0, lock.getQueueLength());
1027	<	lock.writeLock().lock();
1028	<	t1.start();
1029	<	Thread.sleep(SHORT_DELAY_MS);
1030	<	assertEquals(1, lock.getQueueLength());
1031	<	t2.start();
1032	<	Thread.sleep(SHORT_DELAY_MS);
1033	<	assertEquals(2, lock.getQueueLength());
1034	<	t1.interrupt();
1035	<	Thread.sleep(SHORT_DELAY_MS);
1036	<	assertEquals(1, lock.getQueueLength());
1037	<	lock.writeLock().unlock();
1038	<	Thread.sleep(SHORT_DELAY_MS);
1039	<	assertEquals(0, lock.getQueueLength());
1040	<	t1.join();
1041	<	t2.join();
870	<	} catch(Exception e){
871	<	unexpectedException();
872	<	}
873	<	}
1025	>	assertEquals(0, lock.getQueueLength());
1026	>	lock.writeLock().lock();
1027	>	t1.start();
1028	>	Thread.sleep(SHORT_DELAY_MS);
1029	>	assertEquals(1, lock.getQueueLength());
1030	>	t2.start();
1031	>	Thread.sleep(SHORT_DELAY_MS);
1032	>	assertEquals(2, lock.getQueueLength());
1033	>	t1.interrupt();
1034	>	Thread.sleep(SHORT_DELAY_MS);
1035	>	assertEquals(1, lock.getQueueLength());
1036	>	lock.writeLock().unlock();
1037	>	Thread.sleep(SHORT_DELAY_MS);
1038	>	assertEquals(0, lock.getQueueLength());
1039	>	t1.join();
1040	>	t2.join();
1041	>	}
1042
1043		/**
1044		* getQueuedThreads includes waiting threads
1045		*/
1046	<	public void testGetQueuedThreads() {
1047	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1046	>	public void testGetQueuedThreads() throws InterruptedException {
1047	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1048		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1049		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1050	+	assertTrue(lock.getQueuedThreads().isEmpty());
1051	+	lock.writeLock().lock();
1052	+	assertTrue(lock.getQueuedThreads().isEmpty());
1053	+	t1.start();
1054	+	Thread.sleep(SHORT_DELAY_MS);
1055	+	assertTrue(lock.getQueuedThreads().contains(t1));
1056	+	t2.start();
1057	+	Thread.sleep(SHORT_DELAY_MS);
1058	+	assertTrue(lock.getQueuedThreads().contains(t1));
1059	+	assertTrue(lock.getQueuedThreads().contains(t2));
1060	+	t1.interrupt();
1061	+	Thread.sleep(SHORT_DELAY_MS);
1062	+	assertFalse(lock.getQueuedThreads().contains(t1));
1063	+	assertTrue(lock.getQueuedThreads().contains(t2));
1064	+	lock.writeLock().unlock();
1065	+	Thread.sleep(SHORT_DELAY_MS);
1066	+	assertTrue(lock.getQueuedThreads().isEmpty());
1067	+	t1.join();
1068	+	t2.join();
1069	+	}
1070	+
1071	+	/**
1072	+	* hasWaiters throws NPE if null
1073	+	*/
1074	+	public void testHasWaitersNPE() {
1075	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1076		try {
1077	<	assertTrue(lock.getQueuedThreads().isEmpty());
1078	<	lock.writeLock().lock();
1079	<	assertTrue(lock.getQueuedThreads().isEmpty());
1080	<	t1.start();
887	<	Thread.sleep(SHORT_DELAY_MS);
888	<	assertTrue(lock.getQueuedThreads().contains(t1));
889	<	t2.start();
890	<	Thread.sleep(SHORT_DELAY_MS);
891	<	assertTrue(lock.getQueuedThreads().contains(t1));
892	<	assertTrue(lock.getQueuedThreads().contains(t2));
893	<	t1.interrupt();
894	<	Thread.sleep(SHORT_DELAY_MS);
895	<	assertFalse(lock.getQueuedThreads().contains(t1));
896	<	assertTrue(lock.getQueuedThreads().contains(t2));
897	<	lock.writeLock().unlock();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().isEmpty());
900	<	t1.join();
901	<	t2.join();
902	<	} catch(Exception e){
903	<	unexpectedException();
904	<	}
905	<	}
1077	>	lock.hasWaiters(null);
1078	>	shouldThrow();
1079	>	} catch (NullPointerException success) {}
1080	>	}
1081
1082		/**
1083	<	* hasWaiters returns true when a thread is waiting, else false
1083	>	* getWaitQueueLength throws NPE if null
1084		*/
1085	<	public void testHasWaiters() {
1086	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1087	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1088	<	Thread t = new Thread(new Runnable() {
1089	<	public void run() {
1090	<	try {
1091	<	lock.writeLock().lock();
917	<	threadAssertFalse(c.hasWaiters());
918	<	threadAssertEquals(0, c.getWaitQueueLength());
919	<	c.await();
920	<	lock.writeLock().unlock();
921	<	}
922	<	catch(InterruptedException e) {
923	<	threadUnexpectedException();
924	<	}
925	<	}
926	<	});
1085	>	public void testGetWaitQueueLengthNPE() {
1086	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1087	>	try {
1088	>	lock.getWaitQueueLength(null);
1089	>	shouldThrow();
1090	>	} catch (NullPointerException success) {}
1091	>	}
1092
1093	+
1094	+	/**
1095	+	* getWaitingThreads throws NPE if null
1096	+	*/
1097	+	public void testGetWaitingThreadsNPE() {
1098	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1099		try {
1100	<	t.start();
1101	<	Thread.sleep(SHORT_DELAY_MS);
1102	<	lock.writeLock().lock();
1103	<	assertTrue(c.hasWaiters());
1104	<	assertEquals(1, c.getWaitQueueLength());
1105	<	c.signal();
1106	<	lock.writeLock().unlock();
1107	<	Thread.sleep(SHORT_DELAY_MS);
1108	<	lock.writeLock().lock();
1109	<	assertFalse(c.hasWaiters());
1110	<	assertEquals(0, c.getWaitQueueLength());
1111	<	lock.writeLock().unlock();
1112	<	t.join(SHORT_DELAY_MS);
1113	<	assertFalse(t.isAlive());
1114	<	}
1115	<	catch (Exception ex) {
1116	<	unexpectedException();
1117	<	}
1100	>	lock.getWaitingThreads(null);
1101	>	shouldThrow();
1102	>	} catch (NullPointerException success) {}
1103	>	}
1104	>
1105	>	/**
1106	>	* hasWaiters throws IAE if not owned
1107	>	*/
1108	>	public void testHasWaitersIAE() {
1109	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1110	>	final Condition c = lock.writeLock().newCondition();
1111	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1112	>	try {
1113	>	lock2.hasWaiters(c);
1114	>	shouldThrow();
1115	>	} catch (IllegalArgumentException success) {}
1116	>	}
1117	>
1118	>	/**
1119	>	* hasWaiters throws IMSE if not locked
1120	>	*/
1121	>	public void testHasWaitersIMSE() {
1122	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1123	>	final Condition c = lock.writeLock().newCondition();
1124	>	try {
1125	>	lock.hasWaiters(c);
1126	>	shouldThrow();
1127	>	} catch (IllegalMonitorStateException success) {}
1128	>	}
1129	>
1130	>
1131	>	/**
1132	>	* getWaitQueueLength throws IAE if not owned
1133	>	*/
1134	>	public void testGetWaitQueueLengthIAE() {
1135	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1136	>	final Condition c = lock.writeLock().newCondition();
1137	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1138	>	try {
1139	>	lock2.getWaitQueueLength(c);
1140	>	shouldThrow();
1141	>	} catch (IllegalArgumentException success) {}
1142	>	}
1143	>
1144	>	/**
1145	>	* getWaitQueueLength throws IMSE if not locked
1146	>	*/
1147	>	public void testGetWaitQueueLengthIMSE() {
1148	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1149	>	final Condition c = lock.writeLock().newCondition();
1150	>	try {
1151	>	lock.getWaitQueueLength(c);
1152	>	shouldThrow();
1153	>	} catch (IllegalMonitorStateException success) {}
1154	>	}
1155	>
1156	>
1157	>	/**
1158	>	* getWaitingThreads throws IAE if not owned
1159	>	*/
1160	>	public void testGetWaitingThreadsIAE() {
1161	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1162	>	final Condition c = lock.writeLock().newCondition();
1163	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1164	>	try {
1165	>	lock2.getWaitingThreads(c);
1166	>	shouldThrow();
1167	>	} catch (IllegalArgumentException success) {}
1168	>	}
1169	>
1170	>	/**
1171	>	* getWaitingThreads throws IMSE if not locked
1172	>	*/
1173	>	public void testGetWaitingThreadsIMSE() {
1174	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1175	>	final Condition c = lock.writeLock().newCondition();
1176	>	try {
1177	>	lock.getWaitingThreads(c);
1178	>	shouldThrow();
1179	>	} catch (IllegalMonitorStateException success) {}
1180	>	}
1181	>
1182	>
1183	>	/**
1184	>	* hasWaiters returns true when a thread is waiting, else false
1185	>	*/
1186	>	public void testHasWaiters() throws InterruptedException {
1187	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1188	>	final Condition c = lock.writeLock().newCondition();
1189	>	Thread t = newStartedThread(new CheckedRunnable() {
1190	>	public void realRun() throws InterruptedException {
1191	>	lock.writeLock().lock();
1192	>	assertFalse(lock.hasWaiters(c));
1193	>	assertEquals(0, lock.getWaitQueueLength(c));
1194	>	c.await();
1195	>	lock.writeLock().unlock();
1196	>	}});
1197	>
1198	>	Thread.sleep(SHORT_DELAY_MS);
1199	>	lock.writeLock().lock();
1200	>	assertTrue(lock.hasWaiters(c));
1201	>	assertEquals(1, lock.getWaitQueueLength(c));
1202	>	c.signal();
1203	>	lock.writeLock().unlock();
1204	>	Thread.sleep(SHORT_DELAY_MS);
1205	>	lock.writeLock().lock();
1206	>	assertFalse(lock.hasWaiters(c));
1207	>	assertEquals(0, lock.getWaitQueueLength(c));
1208	>	lock.writeLock().unlock();
1209	>	t.join(SHORT_DELAY_MS);
1210	>	assertFalse(t.isAlive());
1211		}
1212
1213		/**
1214		* getWaitQueueLength returns number of waiting threads
1215		*/
1216	<	public void testGetWaitQueueLength() {
1217	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1218	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1219	<	Thread t1 = new Thread(new Runnable() {
1220	<	public void run() {
1221	<	try {
1222	<	lock.writeLock().lock();
1223	<	threadAssertFalse(c.hasWaiters());
1224	<	threadAssertEquals(0, c.getWaitQueueLength());
1225	<	c.await();
1226	<	lock.writeLock().unlock();
1227	<	}
1228	<	catch(InterruptedException e) {
1229	<	threadUnexpectedException();
1230	<	}
1231	<	}
1232	<	});
1233	<
1234	<	Thread t2 = new Thread(new Runnable() {
1235	<	public void run() {
1236	<	try {
1237	<	lock.writeLock().lock();
1238	<	threadAssertTrue(c.hasWaiters());
1239	<	threadAssertEquals(1, c.getWaitQueueLength());
1240	<	c.await();
977	<	lock.writeLock().unlock();
978	<	}
979	<	catch(InterruptedException e) {
980	<	threadUnexpectedException();
981	<	}
982	<	}
983	<	});
984	<
985	<	try {
986	<	t1.start();
987	<	Thread.sleep(SHORT_DELAY_MS);
988	<	t2.start();
989	<	Thread.sleep(SHORT_DELAY_MS);
990	<	lock.writeLock().lock();
991	<	assertTrue(c.hasWaiters());
992	<	assertEquals(2, c.getWaitQueueLength());
993	<	c.signalAll();
994	<	lock.writeLock().unlock();
995	<	Thread.sleep(SHORT_DELAY_MS);
996	<	lock.writeLock().lock();
997	<	assertFalse(c.hasWaiters());
998	<	assertEquals(0, c.getWaitQueueLength());
999	<	lock.writeLock().unlock();
1000	<	t1.join(SHORT_DELAY_MS);
1001	<	t2.join(SHORT_DELAY_MS);
1002	<	assertFalse(t1.isAlive());
1003	<	assertFalse(t2.isAlive());
1004	<	}
1005	<	catch (Exception ex) {
1006	<	unexpectedException();
1007	<	}
1216	>	public void testGetWaitQueueLength() throws InterruptedException {
1217	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1218	>	final Condition c = lock.writeLock().newCondition();
1219	>	Thread t = newStartedThread(new CheckedRunnable() {
1220	>	public void realRun() throws InterruptedException {
1221	>	lock.writeLock().lock();
1222	>	assertFalse(lock.hasWaiters(c));
1223	>	assertEquals(0, lock.getWaitQueueLength(c));
1224	>	c.await();
1225	>	lock.writeLock().unlock();
1226	>	}});
1227	>
1228	>	Thread.sleep(SHORT_DELAY_MS);
1229	>	lock.writeLock().lock();
1230	>	assertTrue(lock.hasWaiters(c));
1231	>	assertEquals(1, lock.getWaitQueueLength(c));
1232	>	c.signal();
1233	>	lock.writeLock().unlock();
1234	>	Thread.sleep(SHORT_DELAY_MS);
1235	>	lock.writeLock().lock();
1236	>	assertFalse(lock.hasWaiters(c));
1237	>	assertEquals(0, lock.getWaitQueueLength(c));
1238	>	lock.writeLock().unlock();
1239	>	t.join(SHORT_DELAY_MS);
1240	>	assertFalse(t.isAlive());
1241		}
1242	+
1243	+
1244	+	/**
1245	+	* getWaitingThreads returns only and all waiting threads
1246	+	*/
1247	+	public void testGetWaitingThreads() throws InterruptedException {
1248	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1249	+	final Condition c = lock.writeLock().newCondition();
1250	+	Thread t1 = new Thread(new CheckedRunnable() {
1251	+	public void realRun() throws InterruptedException {
1252	+	lock.writeLock().lock();
1253	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1254	+	c.await();
1255	+	lock.writeLock().unlock();
1256	+	}});
1257	+
1258	+	Thread t2 = new Thread(new CheckedRunnable() {
1259	+	public void realRun() throws InterruptedException {
1260	+	lock.writeLock().lock();
1261	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1262	+	c.await();
1263	+	lock.writeLock().unlock();
1264	+	}});
1265	+
1266	+	lock.writeLock().lock();
1267	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1268	+	lock.writeLock().unlock();
1269	+	t1.start();
1270	+	Thread.sleep(SHORT_DELAY_MS);
1271	+	t2.start();
1272	+	Thread.sleep(SHORT_DELAY_MS);
1273	+	lock.writeLock().lock();
1274	+	assertTrue(lock.hasWaiters(c));
1275	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1276	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1277	+	c.signalAll();
1278	+	lock.writeLock().unlock();
1279	+	Thread.sleep(SHORT_DELAY_MS);
1280	+	lock.writeLock().lock();
1281	+	assertFalse(lock.hasWaiters(c));
1282	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1283	+	lock.writeLock().unlock();
1284	+	t1.join(SHORT_DELAY_MS);
1285	+	t2.join(SHORT_DELAY_MS);
1286	+	assertFalse(t1.isAlive());
1287	+	assertFalse(t2.isAlive());
1288	+	}
1289	+
1290	+	/**
1291	+	* toString indicates current lock state
1292	+	*/
1293	+	public void testToString() {
1294	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1295	+	String us = lock.toString();
1296	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1297	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1298	+	lock.writeLock().lock();
1299	+	String ws = lock.toString();
1300	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1301	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1302	+	lock.writeLock().unlock();
1303	+	lock.readLock().lock();
1304	+	lock.readLock().lock();
1305	+	String rs = lock.toString();
1306	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1307	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1308	+	}
1309	+
1310	+	/**
1311	+	* readLock.toString indicates current lock state
1312	+	*/
1313	+	public void testReadLockToString() {
1314	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1315	+	String us = lock.readLock().toString();
1316	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1317	+	lock.readLock().lock();
1318	+	lock.readLock().lock();
1319	+	String rs = lock.readLock().toString();
1320	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1321	+	}
1322	+
1323	+	/**
1324	+	* writeLock.toString indicates current lock state
1325	+	*/
1326	+	public void testWriteLockToString() {
1327	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1328	+	String us = lock.writeLock().toString();
1329	+	assertTrue(us.indexOf("Unlocked") >= 0);
1330	+	lock.writeLock().lock();
1331	+	String ls = lock.writeLock().toString();
1332	+	assertTrue(ls.indexOf("Locked") >= 0);
1333	+	}
1334	+
1335		}

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