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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.17 by dl, Thu Jan 8 01:29:46 2004 UTC vs.
Revision 1.45 by jsr166, Sun May 1 23:49:41 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.util.*;
15
16		public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantReadWriteLock lock;
29		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	<	public void run() {
31	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.writeLock().lockInterruptibly();
32		}
33		}
34
#	Line 38 | Line 37 | public class ReentrantReadWriteLockTest
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<	public Collection<Thread> getWaitingThreads(Condition c) {
57	<	return super.getWaitingThreads(c);
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
59		}
60
61		/**
62		* Constructor sets given fairness, and is in unlocked state
63		*/
64	<	public void testConstructor() {
65	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
64	>	public void testConstructor() {
65	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
66		assertFalse(rl.isFair());
67		assertFalse(rl.isWriteLocked());
68		assertEquals(0, rl.getReadLockCount());
69	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70		assertTrue(r2.isFair());
71		assertFalse(r2.isWriteLocked());
72		assertEquals(0, r2.getReadLockCount());
73	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	+	assertFalse(r3.isFair());
75	+	assertFalse(r3.isWriteLocked());
76	+	assertEquals(0, r3.getReadLockCount());
77		}
78
79		/**
80		* write-locking and read-locking an unlocked lock succeed
81		*/
82	<	public void testLock() {
83	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	>	public void testLock() {
83	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84		rl.writeLock().lock();
85		assertTrue(rl.isWriteLocked());
86		assertTrue(rl.isWriteLockedByCurrentThread());
87	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
88		assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
93		assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
#	Line 103 | Line 105 | public class ReentrantReadWriteLockTest
105		/**
106		* locking an unlocked fair lock succeeds
107		*/
108	<	public void testFairLock() {
109	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	>	public void testFairLock() {
109	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
110		rl.writeLock().lock();
111		assertTrue(rl.isWriteLocked());
112		assertTrue(rl.isWriteLockedByCurrentThread());
113	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
114		assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
119		assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
#	Line 126 | Line 130 | public class ReentrantReadWriteLockTest
130		/**
131		* getWriteHoldCount returns number of recursive holds
132		*/
133	+	public void testGetWriteHoldCount() {
134	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	+	for (int i = 1; i <= SIZE; i++) {
136	+	lock.writeLock().lock();
137	+	assertEquals(i,lock.getWriteHoldCount());
138	+	}
139	+	for (int i = SIZE; i > 0; i--) {
140	+	lock.writeLock().unlock();
141	+	assertEquals(i-1,lock.getWriteHoldCount());
142	+	}
143	+	}
144	+
145	+	/**
146	+	* WriteLock.getHoldCount returns number of recursive holds
147	+	*/
148		public void testGetHoldCount() {
149	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	<	for(int i = 1; i <= SIZE; i++) {
151	<	lock.writeLock().lock();
152	<	assertEquals(i,lock.getWriteHoldCount());
153	<	}
154	<	for(int i = SIZE; i > 0; i--) {
155	<	lock.writeLock().unlock();
156	<	assertEquals(i-1,lock.getWriteHoldCount());
157	<	}
149	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	>	for (int i = 1; i <= SIZE; i++) {
151	>	lock.writeLock().lock();
152	>	assertEquals(i,lock.writeLock().getHoldCount());
153	>	}
154	>	for (int i = SIZE; i > 0; i--) {
155	>	lock.writeLock().unlock();
156	>	assertEquals(i-1,lock.writeLock().getHoldCount());
157	>	}
158		}
159	<
159	>
160	>	/**
161	>	* getReadHoldCount returns number of recursive holds
162	>	*/
163	>	public void testGetReadHoldCount() {
164	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	>	for (int i = 1; i <= SIZE; i++) {
166	>	lock.readLock().lock();
167	>	assertEquals(i,lock.getReadHoldCount());
168	>	}
169	>	for (int i = SIZE; i > 0; i--) {
170	>	lock.readLock().unlock();
171	>	assertEquals(i-1,lock.getReadHoldCount());
172	>	}
173	>	}
174	>
175
176		/**
177		* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179	<	public void testUnlock_IllegalMonitorStateException() {
180	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	<	try {
182	<	rl.writeLock().unlock();
183	<	shouldThrow();
184	<	} catch(IllegalMonitorStateException success){}
179	>	public void testUnlock_IllegalMonitorStateException() {
180	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	>	try {
182	>	rl.writeLock().unlock();
183	>	shouldThrow();
184	>	} catch (IllegalMonitorStateException success) {}
185		}
186
187
188		/**
189		* write-lockInterruptibly is interruptible
190		*/
191	<	public void testWriteLockInterruptibly_Interrupted() {
192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	<	Thread t = new Thread(new Runnable() {
194	<	public void run() {
195	<	try {
196	<	lock.writeLock().lockInterruptibly();
197	<	lock.writeLock().unlock();
198	<	lock.writeLock().lockInterruptibly();
199	<	lock.writeLock().unlock();
200	<	} catch(InterruptedException success){}
201	<	}
202	<	});
203	<	try {
204	<	lock.writeLock().lock();
205	<	t.start();
206	<	t.interrupt();
207	<	lock.writeLock().unlock();
174	<	t.join();
175	<	} catch(Exception e){
176	<	unexpectedException();
177	<	}
178	<	}
191	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
192	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	>	lock.writeLock().lock();
194	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
195	>	public void realRun() throws InterruptedException {
196	>	lock.writeLock().lockInterruptibly();
197	>	lock.writeLock().unlock();
198	>	lock.writeLock().lockInterruptibly();
199	>	lock.writeLock().unlock();
200	>	}});
201	>
202	>	Thread.sleep(SHORT_DELAY_MS);
203	>	t.interrupt();
204	>	Thread.sleep(SHORT_DELAY_MS);
205	>	lock.writeLock().unlock();
206	>	t.join();
207	>	}
208
209		/**
210		* timed write-tryLock is interruptible
211		*/
212	<	public void testWriteTryLock_Interrupted() {
213	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	<	lock.writeLock().lock();
215	<	Thread t = new Thread(new Runnable() {
216	<	public void run() {
217	<	try {
218	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
219	<	} catch(InterruptedException success){}
220	<	}
221	<	});
222	<	try {
223	<	t.start();
195	<	t.interrupt();
196	<	lock.writeLock().unlock();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
200	<	}
212	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	>	lock.writeLock().lock();
215	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
216	>	public void realRun() throws InterruptedException {
217	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
218	>	}});
219	>
220	>	Thread.sleep(SHORT_DELAY_MS);
221	>	t.interrupt();
222	>	lock.writeLock().unlock();
223	>	t.join();
224		}
225
226		/**
227		* read-lockInterruptibly is interruptible
228		*/
229	<	public void testReadLockInterruptibly_Interrupted() {
230	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	<	lock.writeLock().lock();
232	<	Thread t = new Thread(new Runnable() {
233	<	public void run() {
234	<	try {
235	<	lock.readLock().lockInterruptibly();
236	<	} catch(InterruptedException success){}
237	<	}
238	<	});
239	<	try {
240	<	t.start();
241	<	t.interrupt();
242	<	lock.writeLock().unlock();
220	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
229	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
230	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	>	lock.writeLock().lock();
232	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
233	>	public void realRun() throws InterruptedException {
234	>	lock.readLock().lockInterruptibly();
235	>	}});
236	>
237	>	Thread.sleep(SHORT_DELAY_MS);
238	>	t.interrupt();
239	>	Thread.sleep(SHORT_DELAY_MS);
240	>	lock.writeLock().unlock();
241	>	t.join();
242	>	}
243
244		/**
245		* timed read-tryLock is interruptible
246		*/
247	<	public void testReadTryLock_Interrupted() {
248	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	<	lock.writeLock().lock();
250	<	Thread t = new Thread(new Runnable() {
251	<	public void run() {
252	<	try {
253	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
254	<	threadShouldThrow();
255	<	} catch(InterruptedException success){}
256	<	}
257	<	});
240	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
247	>	public void testReadTryLock_Interrupted() throws InterruptedException {
248	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	>	lock.writeLock().lock();
250	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
251	>	public void realRun() throws InterruptedException {
252	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
253	>	}});
254	>
255	>	Thread.sleep(SHORT_DELAY_MS);
256	>	t.interrupt();
257	>	t.join();
258		}
259
260	<
260	>
261		/**
262		* write-tryLock fails if locked
263		*/
264	<	public void testWriteTryLockWhenLocked() {
265	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	<	lock.writeLock().lock();
267	<	Thread t = new Thread(new Runnable() {
268	<	public void run() {
269	<	threadAssertFalse(lock.writeLock().tryLock());
270	<	}
271	<	});
272	<	try {
273	<	t.start();
274	<	t.join();
264	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
264	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
265	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	>	lock.writeLock().lock();
267	>	Thread t = newStartedThread(new CheckedRunnable() {
268	>	public void realRun() {
269	>	assertFalse(lock.writeLock().tryLock());
270	>	}});
271	>
272	>	t.join();
273	>	lock.writeLock().unlock();
274	>	}
275
276		/**
277		* read-tryLock fails if locked
278		*/
279	<	public void testReadTryLockWhenLocked() {
280	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
281	<	lock.writeLock().lock();
282	<	Thread t = new Thread(new Runnable() {
283	<	public void run() {
284	<	threadAssertFalse(lock.readLock().tryLock());
285	<	}
286	<	});
287	<	try {
288	<	t.start();
289	<	t.join();
284	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
279	>	public void testReadTryLockWhenLocked() throws InterruptedException {
280	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
281	>	lock.writeLock().lock();
282	>	Thread t = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() {
284	>	assertFalse(lock.readLock().tryLock());
285	>	}});
286	>
287	>	t.join();
288	>	lock.writeLock().unlock();
289	>	}
290
291		/**
292		* Multiple threads can hold a read lock when not write-locked
293		*/
294	<	public void testMultipleReadLocks() {
295	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	<	lock.readLock().lock();
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	threadAssertTrue(lock.readLock().tryLock());
300	<	lock.readLock().unlock();
301	<	}
302	<	});
303	<	try {
304	<	t.start();
305	<	t.join();
305	<	lock.readLock().unlock();
306	<	} catch(Exception e){
307	<	unexpectedException();
308	<	}
309	<	}
294	>	public void testMultipleReadLocks() throws InterruptedException {
295	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	>	lock.readLock().lock();
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() {
299	>	assertTrue(lock.readLock().tryLock());
300	>	lock.readLock().unlock();
301	>	}});
302	>
303	>	t.join();
304	>	lock.readLock().unlock();
305	>	}
306
307		/**
308		* A writelock succeeds after reading threads unlock
309		*/
310	<	public void testWriteAfterMultipleReadLocks() {
311	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
312	<	lock.readLock().lock();
313	<	Thread t1 = new Thread(new Runnable() {
314	<	public void run() {
315	<	lock.readLock().lock();
316	<	lock.readLock().unlock();
317	<	}
318	<	});
319	<	Thread t2 = new Thread(new Runnable() {
320	<	public void run() {
321	<	lock.writeLock().lock();
322	<	lock.writeLock().unlock();
323	<	}
324	<	});
325	<
326	<	try {
327	<	t1.start();
328	<	t2.start();
329	<	Thread.sleep(SHORT_DELAY_MS);
330	<	lock.readLock().unlock();
335	<	t1.join(MEDIUM_DELAY_MS);
336	<	t2.join(MEDIUM_DELAY_MS);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
310	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
311	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
312	>	lock.readLock().lock();
313	>	Thread t1 = newStartedThread(new CheckedRunnable() {
314	>	public void realRun() {
315	>	lock.readLock().lock();
316	>	lock.readLock().unlock();
317	>	}});
318	>	Thread t2 = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	lock.writeLock().lock();
321	>	lock.writeLock().unlock();
322	>	}});
323	>
324	>	Thread.sleep(SHORT_DELAY_MS);
325	>	lock.readLock().unlock();
326	>	t1.join(MEDIUM_DELAY_MS);
327	>	t2.join(MEDIUM_DELAY_MS);
328	>	assertTrue(!t1.isAlive());
329	>	assertTrue(!t2.isAlive());
330	>	}
331
332		/**
333		* Readlocks succeed after a writing thread unlocks
334		*/
335	<	public void testReadAfterWriteLock() {
336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	<	lock.writeLock().lock();
338	<	Thread t1 = new Thread(new Runnable() {
339	<	public void run() {
340	<	lock.readLock().lock();
341	<	lock.readLock().unlock();
342	<	}
343	<	});
344	<	Thread t2 = new Thread(new Runnable() {
345	<	public void run() {
346	<	lock.readLock().lock();
347	<	lock.readLock().unlock();
348	<	}
349	<	});
350	<
351	<	try {
352	<	t1.start();
353	<	t2.start();
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	<	} catch(Exception e){
362	<	unexpectedException();
363	<	}
364	<	}
335	>	public void testReadAfterWriteLock() throws InterruptedException {
336	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	>	lock.writeLock().lock();
338	>	Thread t1 = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	lock.readLock().lock();
341	>	lock.readLock().unlock();
342	>	}});
343	>	Thread t2 = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() {
345	>	lock.readLock().lock();
346	>	lock.readLock().unlock();
347	>	}});
348	>
349	>	Thread.sleep(SHORT_DELAY_MS);
350	>	lock.writeLock().unlock();
351	>	t1.join(MEDIUM_DELAY_MS);
352	>	t2.join(MEDIUM_DELAY_MS);
353	>	assertTrue(!t1.isAlive());
354	>	assertTrue(!t2.isAlive());
355	>	}
356	>
357	>	/**
358	>	* Read trylock succeeds if write locked by current thread
359	>	*/
360	>	public void testReadHoldingWriteLock() {
361	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
362	>	lock.writeLock().lock();
363	>	assertTrue(lock.readLock().tryLock());
364	>	lock.readLock().unlock();
365	>	lock.writeLock().unlock();
366	>	}
367	>
368	>	/**
369	>	* Read lock succeeds if write locked by current thread even if
370	>	* other threads are waiting for readlock
371	>	*/
372	>	public void testReadHoldingWriteLock2() throws InterruptedException {
373	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
374	>	lock.writeLock().lock();
375	>	Thread t1 = newStartedThread(new CheckedRunnable() {
376	>	public void realRun() {
377	>	lock.readLock().lock();
378	>	lock.readLock().unlock();
379	>	}});
380	>	Thread t2 = newStartedThread(new CheckedRunnable() {
381	>	public void realRun() {
382	>	lock.readLock().lock();
383	>	lock.readLock().unlock();
384	>	}});
385	>
386	>	lock.readLock().lock();
387	>	lock.readLock().unlock();
388	>	Thread.sleep(SHORT_DELAY_MS);
389	>	lock.readLock().lock();
390	>	lock.readLock().unlock();
391	>	lock.writeLock().unlock();
392	>	t1.join(MEDIUM_DELAY_MS);
393	>	t2.join(MEDIUM_DELAY_MS);
394	>	assertTrue(!t1.isAlive());
395	>	assertTrue(!t2.isAlive());
396	>	}
397	>
398	>	/**
399	>	* Read lock succeeds if write locked by current thread even if
400	>	* other threads are waiting for writelock
401	>	*/
402	>	public void testReadHoldingWriteLock3() throws InterruptedException {
403	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	>	lock.writeLock().lock();
405	>	Thread t1 = newStartedThread(new CheckedRunnable() {
406	>	public void realRun() {
407	>	lock.writeLock().lock();
408	>	lock.writeLock().unlock();
409	>	}});
410	>	Thread t2 = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	lock.writeLock().lock();
413	>	lock.writeLock().unlock();
414	>	}});
415	>
416	>	lock.readLock().lock();
417	>	lock.readLock().unlock();
418	>	Thread.sleep(SHORT_DELAY_MS);
419	>	lock.readLock().lock();
420	>	lock.readLock().unlock();
421	>	lock.writeLock().unlock();
422	>	t1.join(MEDIUM_DELAY_MS);
423	>	t2.join(MEDIUM_DELAY_MS);
424	>	assertTrue(!t1.isAlive());
425	>	assertTrue(!t2.isAlive());
426	>	}
427	>
428	>
429	>	/**
430	>	* Write lock succeeds if write locked by current thread even if
431	>	* other threads are waiting for writelock
432	>	*/
433	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
434	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
435	>	lock.writeLock().lock();
436	>	Thread t1 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.writeLock().lock();
439	>	lock.writeLock().unlock();
440	>	}});
441	>	Thread t2 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446	>
447	>	lock.writeLock().lock();
448	>	lock.writeLock().unlock();
449	>	Thread.sleep(SHORT_DELAY_MS);
450	>	lock.writeLock().lock();
451	>	lock.writeLock().unlock();
452	>	lock.writeLock().unlock();
453	>	t1.join(MEDIUM_DELAY_MS);
454	>	t2.join(MEDIUM_DELAY_MS);
455	>	assertTrue(!t1.isAlive());
456	>	assertTrue(!t2.isAlive());
457	>	}
458	>
459	>
460	>	/**
461	>	* Fair Read trylock succeeds if write locked by current thread
462	>	*/
463	>	public void testReadHoldingWriteLockFair() {
464	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
465	>	lock.writeLock().lock();
466	>	assertTrue(lock.readLock().tryLock());
467	>	lock.readLock().unlock();
468	>	lock.writeLock().unlock();
469	>	}
470	>
471	>	/**
472	>	* Fair Read lock succeeds if write locked by current thread even if
473	>	* other threads are waiting for readlock
474	>	*/
475	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
476	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
477	>	lock.writeLock().lock();
478	>	Thread t1 = newStartedThread(new CheckedRunnable() {
479	>	public void realRun() {
480	>	lock.readLock().lock();
481	>	lock.readLock().unlock();
482	>	}});
483	>	Thread t2 = newStartedThread(new CheckedRunnable() {
484	>	public void realRun() {
485	>	lock.readLock().lock();
486	>	lock.readLock().unlock();
487	>	}});
488	>
489	>	lock.readLock().lock();
490	>	lock.readLock().unlock();
491	>	Thread.sleep(SHORT_DELAY_MS);
492	>	lock.readLock().lock();
493	>	lock.readLock().unlock();
494	>	lock.writeLock().unlock();
495	>	t1.join(MEDIUM_DELAY_MS);
496	>	t2.join(MEDIUM_DELAY_MS);
497	>	assertTrue(!t1.isAlive());
498	>	assertTrue(!t2.isAlive());
499	>	}
500	>
501	>
502	>	/**
503	>	* Fair Read lock succeeds if write locked by current thread even if
504	>	* other threads are waiting for writelock
505	>	*/
506	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
507	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
508	>	lock.writeLock().lock();
509	>	Thread t1 = newStartedThread(new CheckedRunnable() {
510	>	public void realRun() {
511	>	lock.writeLock().lock();
512	>	lock.writeLock().unlock();
513	>	}});
514	>	Thread t2 = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}});
519	>
520	>	lock.readLock().lock();
521	>	lock.readLock().unlock();
522	>	Thread.sleep(SHORT_DELAY_MS);
523	>	lock.readLock().lock();
524	>	lock.readLock().unlock();
525	>	lock.writeLock().unlock();
526	>	t1.join(MEDIUM_DELAY_MS);
527	>	t2.join(MEDIUM_DELAY_MS);
528	>	assertTrue(!t1.isAlive());
529	>	assertTrue(!t2.isAlive());
530	>	}
531	>
532	>
533	>	/**
534	>	* Fair Write lock succeeds if write locked by current thread even if
535	>	* other threads are waiting for writelock
536	>	*/
537	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
538	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
539	>	lock.writeLock().lock();
540	>	Thread t1 = newStartedThread(new CheckedRunnable() {
541	>	public void realRun() {
542	>	lock.writeLock().lock();
543	>	lock.writeLock().unlock();
544	>	}});
545	>	Thread t2 = newStartedThread(new CheckedRunnable() {
546	>	public void realRun() {
547	>	lock.writeLock().lock();
548	>	lock.writeLock().unlock();
549	>	}});
550	>
551	>	Thread.sleep(SHORT_DELAY_MS);
552	>	assertTrue(lock.isWriteLockedByCurrentThread());
553	>	assertEquals(1, lock.getWriteHoldCount());
554	>	lock.writeLock().lock();
555	>	assertEquals(2, lock.getWriteHoldCount());
556	>	lock.writeLock().unlock();
557	>	lock.writeLock().lock();
558	>	lock.writeLock().unlock();
559	>	lock.writeLock().unlock();
560	>	t1.join(MEDIUM_DELAY_MS);
561	>	t2.join(MEDIUM_DELAY_MS);
562	>	assertTrue(!t1.isAlive());
563	>	assertTrue(!t2.isAlive());
564	>	}
565
566
567		/**
568		* Read tryLock succeeds if readlocked but not writelocked
569		*/
570	<	public void testTryLockWhenReadLocked() {
571	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
572	<	lock.readLock().lock();
573	<	Thread t = new Thread(new Runnable() {
574	<	public void run() {
575	<	threadAssertTrue(lock.readLock().tryLock());
576	<	lock.readLock().unlock();
577	<	}
391	<	});
392	<	try {
393	<	t.start();
394	<	t.join();
395	<	lock.readLock().unlock();
396	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
570	>	public void testTryLockWhenReadLocked() throws InterruptedException {
571	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
572	>	lock.readLock().lock();
573	>	Thread t = newStartedThread(new CheckedRunnable() {
574	>	public void realRun() {
575	>	assertTrue(lock.readLock().tryLock());
576	>	lock.readLock().unlock();
577	>	}});
578
579	<
579	>	t.join();
580	>	lock.readLock().unlock();
581	>	}
582
583		/**
584		* write tryLock fails when readlocked
585		*/
586	<	public void testWriteTryLockWhenReadLocked() {
587	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	<	lock.readLock().lock();
589	<	Thread t = new Thread(new Runnable() {
590	<	public void run() {
591	<	threadAssertFalse(lock.writeLock().tryLock());
592	<	}
593	<	});
594	<	try {
595	<	t.start();
596	<	t.join();
597	<	lock.readLock().unlock();
598	<	} catch(Exception e){
599	<	unexpectedException();
600	<	}
601	<	}
586	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
587	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	>	lock.readLock().lock();
589	>	Thread t = newStartedThread(new CheckedRunnable() {
590	>	public void realRun() {
591	>	assertFalse(lock.writeLock().tryLock());
592	>	}});
593	>
594	>	t.join();
595	>	lock.readLock().unlock();
596	>	}
597	>
598	>
599	>	/**
600	>	* Fair Read tryLock succeeds if readlocked but not writelocked
601	>	*/
602	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
603	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
604	>	lock.readLock().lock();
605	>	Thread t = newStartedThread(new CheckedRunnable() {
606	>	public void realRun() {
607	>	assertTrue(lock.readLock().tryLock());
608	>	lock.readLock().unlock();
609	>	}});
610	>
611	>	t.join();
612	>	lock.readLock().unlock();
613	>	}
614	>
615	>
616	>
617	>	/**
618	>	* Fair write tryLock fails when readlocked
619	>	*/
620	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
621	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
622	>	lock.readLock().lock();
623	>	Thread t = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	assertFalse(lock.writeLock().tryLock());
626	>	}});
627	>
628	>	t.join();
629	>	lock.readLock().unlock();
630	>	}
631	>
632
423	–
633
634		/**
635		* write timed tryLock times out if locked
636		*/
637	<	public void testWriteTryLock_Timeout() {
638	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
639	<	lock.writeLock().lock();
640	<	Thread t = new Thread(new Runnable() {
641	<	public void run() {
642	<	try {
643	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
644	<	} catch (Exception ex) {
645	<	threadUnexpectedException();
646	<	}
647	<	}
648	<	});
440	<	try {
441	<	t.start();
442	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
637	>	public void testWriteTryLock_Timeout() throws InterruptedException {
638	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
639	>	lock.writeLock().lock();
640	>	Thread t = newStartedThread(new CheckedRunnable() {
641	>	public void realRun() throws InterruptedException {
642	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
643	>	}});
644	>
645	>	t.join();
646	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
647	>	lock.writeLock().unlock();
648	>	}
649
650		/**
651		* read timed tryLock times out if write-locked
652		*/
653	<	public void testReadTryLock_Timeout() {
654	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
655	<	lock.writeLock().lock();
656	<	Thread t = new Thread(new Runnable() {
657	<	public void run() {
658	<	try {
659	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
660	<	} catch (Exception ex) {
661	<	threadUnexpectedException();
662	<	}
663	<	}
664	<	});
464	<	try {
465	<	t.start();
466	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
653	>	public void testReadTryLock_Timeout() throws InterruptedException {
654	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
655	>	lock.writeLock().lock();
656	>	Thread t = newStartedThread(new CheckedRunnable() {
657	>	public void realRun() throws InterruptedException {
658	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
659	>	}});
660	>
661	>	t.join();
662	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
663	>	lock.writeLock().unlock();
664	>	}
665
666
667		/**
668		* write lockInterruptibly succeeds if lock free else is interruptible
669		*/
670	<	public void testWriteLockInterruptibly() {
671	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
672	<	try {
673	<	lock.writeLock().lockInterruptibly();
674	<	} catch(Exception e) {
675	<	unexpectedException();
676	<	}
677	<	Thread t = new Thread(new Runnable() {
678	<	public void run() {
679	<	try {
680	<	lock.writeLock().lockInterruptibly();
681	<	threadShouldThrow();
682	<	}
490	<	catch(InterruptedException success) {
491	<	}
492	<	}
493	<	});
494	<	try {
495	<	t.start();
496	<	t.interrupt();
497	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
670	>	public void testWriteLockInterruptibly() throws InterruptedException {
671	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
672	>	lock.writeLock().lockInterruptibly();
673	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	lock.writeLock().lockInterruptibly();
676	>	}});
677	>
678	>	Thread.sleep(SHORT_DELAY_MS);
679	>	t.interrupt();
680	>	Thread.sleep(SHORT_DELAY_MS);
681	>	t.join();
682	>	lock.writeLock().unlock();
683		}
684
685		/**
686	<	*  read lockInterruptibly succeeds if lock free else is interruptible
687	<	*/
688	<	public void testReadLockInterruptibly() {
689	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	<	try {
691	<	lock.writeLock().lockInterruptibly();
692	<	} catch(Exception e) {
693	<	unexpectedException();
694	<	}
695	<	Thread t = new Thread(new Runnable() {
696	<	public void run() {
697	<	try {
698	<	lock.readLock().lockInterruptibly();
699	<	threadShouldThrow();
519	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
524	<	try {
525	<	t.start();
526	<	t.interrupt();
527	<	t.join();
528	<	lock.writeLock().unlock();
529	<	} catch(Exception e){
530	<	unexpectedException();
531	<	}
686	>	* read lockInterruptibly succeeds if lock free else is interruptible
687	>	*/
688	>	public void testReadLockInterruptibly() throws InterruptedException {
689	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	>	lock.writeLock().lockInterruptibly();
691	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
692	>	public void realRun() throws InterruptedException {
693	>	lock.readLock().lockInterruptibly();
694	>	}});
695	>
696	>	Thread.sleep(SHORT_DELAY_MS);
697	>	t.interrupt();
698	>	t.join();
699	>	lock.writeLock().unlock();
700		}
701
702		/**
703		* Calling await without holding lock throws IllegalMonitorStateException
704		*/
705	<	public void testAwait_IllegalMonitor() {
706	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705	>	public void testAwait_IllegalMonitor() throws InterruptedException {
706	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
707		final Condition c = lock.writeLock().newCondition();
708		try {
709		c.await();
710		shouldThrow();
711	<	}
544	<	catch (IllegalMonitorStateException success) {
545	<	}
546	<	catch (Exception ex) {
547	<	shouldThrow();
548	<	}
711	>	} catch (IllegalMonitorStateException success) {}
712		}
713
714		/**
715		* Calling signal without holding lock throws IllegalMonitorStateException
716		*/
717		public void testSignal_IllegalMonitor() {
718	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
718	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
719		final Condition c = lock.writeLock().newCondition();
720		try {
721		c.signal();
722		shouldThrow();
723	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
723	>	} catch (IllegalMonitorStateException success) {}
724		}
725
726		/**
727		* awaitNanos without a signal times out
728		*/
729	<	public void testAwaitNanos_Timeout() {
730	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
729	>	public void testAwaitNanos_Timeout() throws InterruptedException {
730	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
731		final Condition c = lock.writeLock().newCondition();
732	<	try {
733	<	lock.writeLock().lock();
734	<	long t = c.awaitNanos(100);
735	<	assertTrue(t <= 0);
736	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
732	>
733	>	lock.writeLock().lock();
734	>	long t = c.awaitNanos(100);
735	>	assertTrue(t <= 0);
736	>	lock.writeLock().unlock();
737		}
738
739
740		/**
741	<	*  timed await without a signal times out
741	>	* timed await without a signal times out
742		*/
743	<	public void testAwait_Timeout() {
744	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	>	public void testAwait_Timeout() throws InterruptedException {
744	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
745		final Condition c = lock.writeLock().newCondition();
746	<	try {
747	<	lock.writeLock().lock();
748	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
595	<	lock.writeLock().unlock();
596	<	}
597	<	catch (Exception ex) {
598	<	unexpectedException();
599	<	}
746	>	lock.writeLock().lock();
747	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
748	>	lock.writeLock().unlock();
749		}
750
751		/**
752		* awaitUntil without a signal times out
753		*/
754	<	public void testAwaitUntil_Timeout() {
755	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	public void testAwaitUntil_Timeout() throws InterruptedException {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
756		final Condition c = lock.writeLock().newCondition();
757	<	try {
758	<	lock.writeLock().lock();
759	<	java.util.Date d = new java.util.Date();
760	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
612	<	lock.writeLock().unlock();
613	<	}
614	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
757	>	lock.writeLock().lock();
758	>	java.util.Date d = new java.util.Date();
759	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
760	>	lock.writeLock().unlock();
761		}
762
763		/**
764		* await returns when signalled
765		*/
766	<	public void testAwait() {
767	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
766	>	public void testAwait() throws InterruptedException {
767	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
768		final Condition c = lock.writeLock().newCondition();
769	<	Thread t = new Thread(new Runnable() {
770	<	public void run() {
771	<	try {
772	<	lock.writeLock().lock();
773	<	c.await();
774	<	lock.writeLock().unlock();
775	<	}
776	<	catch(InterruptedException e) {
777	<	threadUnexpectedException();
778	<	}
779	<	}
780	<	});
769	>	Thread t = newStartedThread(new CheckedRunnable() {
770	>	public void realRun() throws InterruptedException {
771	>	lock.writeLock().lock();
772	>	c.await();
773	>	lock.writeLock().unlock();
774	>	}});
775	>
776	>	Thread.sleep(SHORT_DELAY_MS);
777	>	lock.writeLock().lock();
778	>	c.signal();
779	>	lock.writeLock().unlock();
780	>	t.join(SHORT_DELAY_MS);
781	>	assertFalse(t.isAlive());
782	>	}
783	>
784	>	/** A helper class for uninterruptible wait tests */
785	>	class UninterruptableThread extends Thread {
786	>	private Lock lock;
787	>	private Condition c;
788	>
789	>	public volatile boolean canAwake = false;
790	>	public volatile boolean interrupted = false;
791	>	public volatile boolean lockStarted = false;
792	>
793	>	public UninterruptableThread(Lock lock, Condition c) {
794	>	this.lock = lock;
795	>	this.c = c;
796	>	}
797	>
798	>	public synchronized void run() {
799	>	lock.lock();
800	>	lockStarted = true;
801	>
802	>	while (!canAwake) {
803	>	c.awaitUninterruptibly();
804	>	}
805
806	<	try {
807	<	t.start();
640	<	Thread.sleep(SHORT_DELAY_MS);
641	<	lock.writeLock().lock();
642	<	c.signal();
643	<	lock.writeLock().unlock();
644	<	t.join(SHORT_DELAY_MS);
645	<	assertFalse(t.isAlive());
646	<	}
647	<	catch (Exception ex) {
648	<	unexpectedException();
806	>	interrupted = isInterrupted();
807	>	lock.unlock();
808		}
809		}
810
811		/**
812		* awaitUninterruptibly doesn't abort on interrupt
813		*/
814	<	public void testAwaitUninterruptibly() {
815	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
814	>	public void testAwaitUninterruptibly() throws InterruptedException {
815	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
816		final Condition c = lock.writeLock().newCondition();
817	<	Thread t = new Thread(new Runnable() {
659	<	public void run() {
660	<	lock.writeLock().lock();
661	<	c.awaitUninterruptibly();
662	<	lock.writeLock().unlock();
663	<	}
664	<	});
817	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
818
819	+	thread.start();
820	+
821	+	while (!thread.lockStarted) {
822	+	Thread.sleep(100);
823	+	}
824	+
825	+	lock.writeLock().lock();
826		try {
827	<	t.start();
828	<	Thread.sleep(SHORT_DELAY_MS);
669	<	t.interrupt();
670	<	lock.writeLock().lock();
827	>	thread.interrupt();
828	>	thread.canAwake = true;
829		c.signal();
830	+	} finally {
831		lock.writeLock().unlock();
673	–	assert(t.isInterrupted());
674	–	t.join(SHORT_DELAY_MS);
675	–	assertFalse(t.isAlive());
676	–	}
677	–	catch (Exception ex) {
678	–	unexpectedException();
832		}
833	+
834	+	thread.join();
835	+	assertTrue(thread.interrupted);
836	+	assertFalse(thread.isAlive());
837		}
838
839		/**
840		* await is interruptible
841		*/
842	<	public void testAwait_Interrupt() {
843	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
842	>	public void testAwait_Interrupt() throws InterruptedException {
843	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844		final Condition c = lock.writeLock().newCondition();
845	<	Thread t = new Thread(new Runnable() {
846	<	public void run() {
847	<	try {
848	<	lock.writeLock().lock();
849	<	c.await();
850	<	lock.writeLock().unlock();
851	<	threadShouldThrow();
852	<	}
853	<	catch(InterruptedException success) {
854	<	}
855	<	}
699	<	});
700	<
701	<	try {
702	<	t.start();
703	<	Thread.sleep(SHORT_DELAY_MS);
704	<	t.interrupt();
705	<	t.join(SHORT_DELAY_MS);
706	<	assertFalse(t.isAlive());
707	<	}
708	<	catch (Exception ex) {
709	<	unexpectedException();
710	<	}
845	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
846	>	public void realRun() throws InterruptedException {
847	>	lock.writeLock().lock();
848	>	c.await();
849	>	lock.writeLock().unlock();
850	>	}});
851	>
852	>	Thread.sleep(SHORT_DELAY_MS);
853	>	t.interrupt();
854	>	t.join(SHORT_DELAY_MS);
855	>	assertFalse(t.isAlive());
856		}
857
858		/**
859		* awaitNanos is interruptible
860		*/
861	<	public void testAwaitNanos_Interrupt() {
862	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
861	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
862	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863		final Condition c = lock.writeLock().newCondition();
864	<	Thread t = new Thread(new Runnable() {
865	<	public void run() {
866	<	try {
867	<	lock.writeLock().lock();
868	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
869	<	lock.writeLock().unlock();
870	<	threadShouldThrow();
871	<	}
872	<	catch(InterruptedException success) {
873	<	}
874	<	}
730	<	});
731	<
732	<	try {
733	<	t.start();
734	<	Thread.sleep(SHORT_DELAY_MS);
735	<	t.interrupt();
736	<	t.join(SHORT_DELAY_MS);
737	<	assertFalse(t.isAlive());
738	<	}
739	<	catch (Exception ex) {
740	<	unexpectedException();
741	<	}
864	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
865	>	public void realRun() throws InterruptedException {
866	>	lock.writeLock().lock();
867	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
868	>	lock.writeLock().unlock();
869	>	}});
870	>
871	>	Thread.sleep(SHORT_DELAY_MS);
872	>	t.interrupt();
873	>	t.join(SHORT_DELAY_MS);
874	>	assertFalse(t.isAlive());
875		}
876
877		/**
878		* awaitUntil is interruptible
879		*/
880	<	public void testAwaitUntil_Interrupt() {
881	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
880	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
881	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
882		final Condition c = lock.writeLock().newCondition();
883	<	Thread t = new Thread(new Runnable() {
884	<	public void run() {
885	<	try {
886	<	lock.writeLock().lock();
887	<	java.util.Date d = new java.util.Date();
888	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
889	<	lock.writeLock().unlock();
890	<	threadShouldThrow();
891	<	}
892	<	catch(InterruptedException success) {
893	<	}
894	<	}
762	<	});
763	<
764	<	try {
765	<	t.start();
766	<	Thread.sleep(SHORT_DELAY_MS);
767	<	t.interrupt();
768	<	t.join(SHORT_DELAY_MS);
769	<	assertFalse(t.isAlive());
770	<	}
771	<	catch (Exception ex) {
772	<	unexpectedException();
773	<	}
883	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
884	>	public void realRun() throws InterruptedException {
885	>	lock.writeLock().lock();
886	>	java.util.Date d = new java.util.Date();
887	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
888	>	lock.writeLock().unlock();
889	>	}});
890	>
891	>	Thread.sleep(SHORT_DELAY_MS);
892	>	t.interrupt();
893	>	t.join(SHORT_DELAY_MS);
894	>	assertFalse(t.isAlive());
895		}
896
897		/**
898		* signalAll wakes up all threads
899		*/
900	<	public void testSignalAll() {
901	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
900	>	public void testSignalAll() throws InterruptedException {
901	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902		final Condition c = lock.writeLock().newCondition();
903	<	Thread t1 = new Thread(new Runnable() {
904	<	public void run() {
905	<	try {
906	<	lock.writeLock().lock();
907	<	c.await();
908	<	lock.writeLock().unlock();
909	<	}
910	<	catch(InterruptedException e) {
911	<	threadUnexpectedException();
912	<	}
913	<	}
914	<	});
915	<
916	<	Thread t2 = new Thread(new Runnable() {
917	<	public void run() {
918	<	try {
919	<	lock.writeLock().lock();
920	<	c.await();
921	<	lock.writeLock().unlock();
922	<	}
923	<	catch(InterruptedException e) {
924	<	threadUnexpectedException();
804	<	}
805	<	}
806	<	});
807	<
808	<	try {
809	<	t1.start();
810	<	t2.start();
811	<	Thread.sleep(SHORT_DELAY_MS);
812	<	lock.writeLock().lock();
813	<	c.signalAll();
814	<	lock.writeLock().unlock();
815	<	t1.join(SHORT_DELAY_MS);
816	<	t2.join(SHORT_DELAY_MS);
817	<	assertFalse(t1.isAlive());
818	<	assertFalse(t2.isAlive());
819	<	}
820	<	catch (Exception ex) {
821	<	unexpectedException();
822	<	}
903	>	Thread t1 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() throws InterruptedException {
905	>	lock.writeLock().lock();
906	>	c.await();
907	>	lock.writeLock().unlock();
908	>	}});
909	>
910	>	Thread t2 = newStartedThread(new CheckedRunnable() {
911	>	public void realRun() throws InterruptedException {
912	>	lock.writeLock().lock();
913	>	c.await();
914	>	lock.writeLock().unlock();
915	>	}});
916	>
917	>	Thread.sleep(SHORT_DELAY_MS);
918	>	lock.writeLock().lock();
919	>	c.signalAll();
920	>	lock.writeLock().unlock();
921	>	t1.join(SHORT_DELAY_MS);
922	>	t2.join(SHORT_DELAY_MS);
923	>	assertFalse(t1.isAlive());
924	>	assertFalse(t2.isAlive());
925		}
926
927		/**
928		* A serialized lock deserializes as unlocked
929		*/
930	<	public void testSerialization() {
930	>	public void testSerialization() throws Exception {
931		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
932		l.readLock().lock();
933		l.readLock().unlock();
934
935	<	try {
936	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
937	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
938	<	out.writeObject(l);
939	<	out.close();
940	<
941	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
942	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
943	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
944	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
935	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
936	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
937	>	out.writeObject(l);
938	>	out.close();
939	>
940	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
941	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
942	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
943	>	r.readLock().lock();
944	>	r.readLock().unlock();
945		}
946
947		/**
948		* hasQueuedThreads reports whether there are waiting threads
949		*/
950	<	public void testhasQueuedThreads() {
951	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
950	>	public void testhasQueuedThreads() throws InterruptedException {
951	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
952		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
953		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
954	+	assertFalse(lock.hasQueuedThreads());
955	+	lock.writeLock().lock();
956	+	t1.start();
957	+	Thread.sleep(SHORT_DELAY_MS);
958	+	assertTrue(lock.hasQueuedThreads());
959	+	t2.start();
960	+	Thread.sleep(SHORT_DELAY_MS);
961	+	assertTrue(lock.hasQueuedThreads());
962	+	t1.interrupt();
963	+	Thread.sleep(SHORT_DELAY_MS);
964	+	assertTrue(lock.hasQueuedThreads());
965	+	lock.writeLock().unlock();
966	+	Thread.sleep(SHORT_DELAY_MS);
967	+	assertFalse(lock.hasQueuedThreads());
968	+	t1.join();
969	+	t2.join();
970	+	}
971	+
972	+	/**
973	+	* hasQueuedThread(null) throws NPE
974	+	*/
975	+	public void testHasQueuedThreadNPE() {
976	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
977		try {
978	<	assertFalse(lock.hasQueuedThreads());
979	<	lock.writeLock().lock();
980	<	t1.start();
981	<	Thread.sleep(SHORT_DELAY_MS);
982	<	assertTrue(lock.hasQueuedThreads());
983	<	t2.start();
984	<	Thread.sleep(SHORT_DELAY_MS);
985	<	assertTrue(lock.hasQueuedThreads());
986	<	t1.interrupt();
987	<	Thread.sleep(SHORT_DELAY_MS);
988	<	assertTrue(lock.hasQueuedThreads());
989	<	lock.writeLock().unlock();
990	<	Thread.sleep(SHORT_DELAY_MS);
991	<	assertFalse(lock.hasQueuedThreads());
992	<	t1.join();
993	<	t2.join();
994	<	} catch(Exception e){
995	<	unexpectedException();
996	<	}
997	<	}
978	>	sync.hasQueuedThread(null);
979	>	shouldThrow();
980	>	} catch (NullPointerException success) {}
981	>	}
982	>
983	>	/**
984	>	* hasQueuedThread reports whether a thread is queued.
985	>	*/
986	>	public void testHasQueuedThread() throws InterruptedException {
987	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
988	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
989	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
990	>	assertFalse(sync.hasQueuedThread(t1));
991	>	assertFalse(sync.hasQueuedThread(t2));
992	>	sync.writeLock().lock();
993	>	t1.start();
994	>	Thread.sleep(SHORT_DELAY_MS);
995	>	assertTrue(sync.hasQueuedThread(t1));
996	>	t2.start();
997	>	Thread.sleep(SHORT_DELAY_MS);
998	>	assertTrue(sync.hasQueuedThread(t1));
999	>	assertTrue(sync.hasQueuedThread(t2));
1000	>	t1.interrupt();
1001	>	Thread.sleep(SHORT_DELAY_MS);
1002	>	assertFalse(sync.hasQueuedThread(t1));
1003	>	assertTrue(sync.hasQueuedThread(t2));
1004	>	sync.writeLock().unlock();
1005	>	Thread.sleep(SHORT_DELAY_MS);
1006	>	assertFalse(sync.hasQueuedThread(t1));
1007	>	Thread.sleep(SHORT_DELAY_MS);
1008	>	assertFalse(sync.hasQueuedThread(t2));
1009	>	t1.join();
1010	>	t2.join();
1011	>	}
1012	>
1013
1014		/**
1015		* getQueueLength reports number of waiting threads
1016		*/
1017	<	public void testGetQueueLength() {
1018	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1017	>	public void testGetQueueLength() throws InterruptedException {
1018	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1019		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1020		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1021	<	try {
1022	<	assertEquals(0, lock.getQueueLength());
1023	<	lock.writeLock().lock();
1024	<	t1.start();
1025	<	Thread.sleep(SHORT_DELAY_MS);
1026	<	assertEquals(1, lock.getQueueLength());
1027	<	t2.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	assertEquals(2, lock.getQueueLength());
1030	<	t1.interrupt();
1031	<	Thread.sleep(SHORT_DELAY_MS);
1032	<	assertEquals(1, lock.getQueueLength());
1033	<	lock.writeLock().unlock();
1034	<	Thread.sleep(SHORT_DELAY_MS);
1035	<	assertEquals(0, lock.getQueueLength());
1036	<	t1.join();
1037	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1021	>	assertEquals(0, lock.getQueueLength());
1022	>	lock.writeLock().lock();
1023	>	t1.start();
1024	>	Thread.sleep(SHORT_DELAY_MS);
1025	>	assertEquals(1, lock.getQueueLength());
1026	>	t2.start();
1027	>	Thread.sleep(SHORT_DELAY_MS);
1028	>	assertEquals(2, lock.getQueueLength());
1029	>	t1.interrupt();
1030	>	Thread.sleep(SHORT_DELAY_MS);
1031	>	assertEquals(1, lock.getQueueLength());
1032	>	lock.writeLock().unlock();
1033	>	Thread.sleep(SHORT_DELAY_MS);
1034	>	assertEquals(0, lock.getQueueLength());
1035	>	t1.join();
1036	>	t2.join();
1037	>	}
1038
1039		/**
1040		* getQueuedThreads includes waiting threads
1041		*/
1042	<	public void testGetQueuedThreads() {
1043	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042	>	public void testGetQueuedThreads() throws InterruptedException {
1043	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1044		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1045		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1046	<	try {
1047	<	assertTrue(lock.getQueuedThreads().isEmpty());
1048	<	lock.writeLock().lock();
1049	<	assertTrue(lock.getQueuedThreads().isEmpty());
1050	<	t1.start();
1051	<	Thread.sleep(SHORT_DELAY_MS);
1052	<	assertTrue(lock.getQueuedThreads().contains(t1));
1053	<	t2.start();
1054	<	Thread.sleep(SHORT_DELAY_MS);
1055	<	assertTrue(lock.getQueuedThreads().contains(t1));
1056	<	assertTrue(lock.getQueuedThreads().contains(t2));
1057	<	t1.interrupt();
1058	<	Thread.sleep(SHORT_DELAY_MS);
1059	<	assertFalse(lock.getQueuedThreads().contains(t1));
1060	<	assertTrue(lock.getQueuedThreads().contains(t2));
1061	<	lock.writeLock().unlock();
1062	<	Thread.sleep(SHORT_DELAY_MS);
1063	<	assertTrue(lock.getQueuedThreads().isEmpty());
1064	<	t1.join();
1065	<	t2.join();
935	<	} catch(Exception e){
936	<	unexpectedException();
937	<	}
938	<	}
1046	>	assertTrue(lock.getQueuedThreads().isEmpty());
1047	>	lock.writeLock().lock();
1048	>	assertTrue(lock.getQueuedThreads().isEmpty());
1049	>	t1.start();
1050	>	Thread.sleep(SHORT_DELAY_MS);
1051	>	assertTrue(lock.getQueuedThreads().contains(t1));
1052	>	t2.start();
1053	>	Thread.sleep(SHORT_DELAY_MS);
1054	>	assertTrue(lock.getQueuedThreads().contains(t1));
1055	>	assertTrue(lock.getQueuedThreads().contains(t2));
1056	>	t1.interrupt();
1057	>	Thread.sleep(SHORT_DELAY_MS);
1058	>	assertFalse(lock.getQueuedThreads().contains(t1));
1059	>	assertTrue(lock.getQueuedThreads().contains(t2));
1060	>	lock.writeLock().unlock();
1061	>	Thread.sleep(SHORT_DELAY_MS);
1062	>	assertTrue(lock.getQueuedThreads().isEmpty());
1063	>	t1.join();
1064	>	t2.join();
1065	>	}
1066
1067		/**
1068		* hasWaiters throws NPE if null
1069		*/
1070		public void testHasWaitersNPE() {
1071	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1071	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1072		try {
1073		lock.hasWaiters(null);
1074		shouldThrow();
1075	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1075	>	} catch (NullPointerException success) {}
1076		}
1077
1078		/**
1079		* getWaitQueueLength throws NPE if null
1080		*/
1081		public void testGetWaitQueueLengthNPE() {
1082	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1082	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1083		try {
1084		lock.getWaitQueueLength(null);
1085		shouldThrow();
1086	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1086	>	} catch (NullPointerException success) {}
1087		}
1088
1089
#	Line 970 | Line 1091 | public class ReentrantReadWriteLockTest
1091		* getWaitingThreads throws NPE if null
1092		*/
1093		public void testGetWaitingThreadsNPE() {
1094	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1094	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1095		try {
1096		lock.getWaitingThreads(null);
1097		shouldThrow();
1098	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1098	>	} catch (NullPointerException success) {}
1099		}
1100
1101		/**
1102		* hasWaiters throws IAE if not owned
1103		*/
1104		public void testHasWaitersIAE() {
1105	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1106	<	final Condition c = (lock.writeLock().newCondition());
1107	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1105	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1106	>	final Condition c = lock.writeLock().newCondition();
1107	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1108		try {
1109		lock2.hasWaiters(c);
1110		shouldThrow();
1111	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1111	>	} catch (IllegalArgumentException success) {}
1112		}
1113
1114		/**
1115		* hasWaiters throws IMSE if not locked
1116		*/
1117		public void testHasWaitersIMSE() {
1118	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1119	<	final Condition c = (lock.writeLock().newCondition());
1118	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1119	>	final Condition c = lock.writeLock().newCondition();
1120		try {
1121		lock.hasWaiters(c);
1122		shouldThrow();
1123	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1123	>	} catch (IllegalMonitorStateException success) {}
1124		}
1125
1126
#	Line 1016 | Line 1128 | public class ReentrantReadWriteLockTest
1128		* getWaitQueueLength throws IAE if not owned
1129		*/
1130		public void testGetWaitQueueLengthIAE() {
1131	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132	<	final Condition c = (lock.writeLock().newCondition());
1133	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1131	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132	>	final Condition c = lock.writeLock().newCondition();
1133	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1134		try {
1135		lock2.getWaitQueueLength(c);
1136		shouldThrow();
1137	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1137	>	} catch (IllegalArgumentException success) {}
1138		}
1139
1140		/**
1141		* getWaitQueueLength throws IMSE if not locked
1142		*/
1143		public void testGetWaitQueueLengthIMSE() {
1144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1145	<	final Condition c = (lock.writeLock().newCondition());
1144	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1145	>	final Condition c = lock.writeLock().newCondition();
1146		try {
1147		lock.getWaitQueueLength(c);
1148		shouldThrow();
1149	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1149	>	} catch (IllegalMonitorStateException success) {}
1150		}
1151
1152
#	Line 1048 | Line 1154 | public class ReentrantReadWriteLockTest
1154		* getWaitingThreads throws IAE if not owned
1155		*/
1156		public void testGetWaitingThreadsIAE() {
1157	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1158	<	final Condition c = (lock.writeLock().newCondition());
1159	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1157	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1158	>	final Condition c = lock.writeLock().newCondition();
1159	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1160		try {
1161		lock2.getWaitingThreads(c);
1162		shouldThrow();
1163	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1163	>	} catch (IllegalArgumentException success) {}
1164		}
1165
1166		/**
1167		* getWaitingThreads throws IMSE if not locked
1168		*/
1169		public void testGetWaitingThreadsIMSE() {
1170	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1171	<	final Condition c = (lock.writeLock().newCondition());
1170	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1171	>	final Condition c = lock.writeLock().newCondition();
1172		try {
1173		lock.getWaitingThreads(c);
1174		shouldThrow();
1175	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1175	>	} catch (IllegalMonitorStateException success) {}
1176		}
1177
1178
1179		/**
1180		* hasWaiters returns true when a thread is waiting, else false
1181		*/
1182	<	public void testHasWaiters() {
1183	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1184	<	final Condition c = (lock.writeLock().newCondition());
1185	<	Thread t = new Thread(new Runnable() {
1186	<	public void run() {
1187	<	try {
1188	<	lock.writeLock().lock();
1189	<	threadAssertFalse(lock.hasWaiters(c));
1190	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1191	<	c.await();
1192	<	lock.writeLock().unlock();
1193	<	}
1194	<	catch(InterruptedException e) {
1195	<	threadUnexpectedException();
1196	<	}
1197	<	}
1198	<	});
1199	<
1200	<	try {
1201	<	t.start();
1202	<	Thread.sleep(SHORT_DELAY_MS);
1203	<	lock.writeLock().lock();
1204	<	assertTrue(lock.hasWaiters(c));
1205	<	assertEquals(1, lock.getWaitQueueLength(c));
1206	<	c.signal();
1107	<	lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1109	<	lock.writeLock().lock();
1110	<	assertFalse(lock.hasWaiters(c));
1111	<	assertEquals(0, lock.getWaitQueueLength(c));
1112	<	lock.writeLock().unlock();
1113	<	t.join(SHORT_DELAY_MS);
1114	<	assertFalse(t.isAlive());
1115	<	}
1116	<	catch (Exception ex) {
1117	<	unexpectedException();
1118	<	}
1182	>	public void testHasWaiters() throws InterruptedException {
1183	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1184	>	final Condition c = lock.writeLock().newCondition();
1185	>	Thread t = newStartedThread(new CheckedRunnable() {
1186	>	public void realRun() throws InterruptedException {
1187	>	lock.writeLock().lock();
1188	>	assertFalse(lock.hasWaiters(c));
1189	>	assertEquals(0, lock.getWaitQueueLength(c));
1190	>	c.await();
1191	>	lock.writeLock().unlock();
1192	>	}});
1193	>
1194	>	Thread.sleep(SHORT_DELAY_MS);
1195	>	lock.writeLock().lock();
1196	>	assertTrue(lock.hasWaiters(c));
1197	>	assertEquals(1, lock.getWaitQueueLength(c));
1198	>	c.signal();
1199	>	lock.writeLock().unlock();
1200	>	Thread.sleep(SHORT_DELAY_MS);
1201	>	lock.writeLock().lock();
1202	>	assertFalse(lock.hasWaiters(c));
1203	>	assertEquals(0, lock.getWaitQueueLength(c));
1204	>	lock.writeLock().unlock();
1205	>	t.join(SHORT_DELAY_MS);
1206	>	assertFalse(t.isAlive());
1207		}
1208
1209		/**
1210		* getWaitQueueLength returns number of waiting threads
1211		*/
1212	<	public void testGetWaitQueueLength() {
1213	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1214	<	final Condition c = (lock.writeLock().newCondition());
1215	<	Thread t = new Thread(new Runnable() {
1216	<	public void run() {
1217	<	try {
1218	<	lock.writeLock().lock();
1219	<	threadAssertFalse(lock.hasWaiters(c));
1220	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1221	<	c.await();
1222	<	lock.writeLock().unlock();
1223	<	}
1224	<	catch(InterruptedException e) {
1225	<	threadUnexpectedException();
1226	<	}
1227	<	}
1228	<	});
1229	<
1230	<	try {
1231	<	t.start();
1232	<	Thread.sleep(SHORT_DELAY_MS);
1233	<	lock.writeLock().lock();
1234	<	assertTrue(lock.hasWaiters(c));
1235	<	assertEquals(1, lock.getWaitQueueLength(c));
1236	<	c.signal();
1149	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
1212	>	public void testGetWaitQueueLength() throws InterruptedException {
1213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1214	>	final Condition c = lock.writeLock().newCondition();
1215	>	Thread t = newStartedThread(new CheckedRunnable() {
1216	>	public void realRun() throws InterruptedException {
1217	>	lock.writeLock().lock();
1218	>	assertFalse(lock.hasWaiters(c));
1219	>	assertEquals(0, lock.getWaitQueueLength(c));
1220	>	c.await();
1221	>	lock.writeLock().unlock();
1222	>	}});
1223	>
1224	>	Thread.sleep(SHORT_DELAY_MS);
1225	>	lock.writeLock().lock();
1226	>	assertTrue(lock.hasWaiters(c));
1227	>	assertEquals(1, lock.getWaitQueueLength(c));
1228	>	c.signal();
1229	>	lock.writeLock().unlock();
1230	>	Thread.sleep(SHORT_DELAY_MS);
1231	>	lock.writeLock().lock();
1232	>	assertFalse(lock.hasWaiters(c));
1233	>	assertEquals(0, lock.getWaitQueueLength(c));
1234	>	lock.writeLock().unlock();
1235	>	t.join(SHORT_DELAY_MS);
1236	>	assertFalse(t.isAlive());
1237		}
1238
1239
1240		/**
1241		* getWaitingThreads returns only and all waiting threads
1242		*/
1243	<	public void testGetWaitingThreads() {
1244	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1243	>	public void testGetWaitingThreads() throws InterruptedException {
1244	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1245		final Condition c = lock.writeLock().newCondition();
1246	<	Thread t1 = new Thread(new Runnable() {
1247	<	public void run() {
1248	<	try {
1249	<	lock.writeLock().lock();
1250	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1251	<	c.await();
1252	<	lock.writeLock().unlock();
1253	<	}
1254	<	catch(InterruptedException e) {
1255	<	threadUnexpectedException();
1256	<	}
1257	<	}
1258	<	});
1259	<
1260	<	Thread t2 = new Thread(new Runnable() {
1261	<	public void run() {
1262	<	try {
1263	<	lock.writeLock().lock();
1264	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1265	<	c.await();
1266	<	lock.writeLock().unlock();
1267	<	}
1268	<	catch(InterruptedException e) {
1269	<	threadUnexpectedException();
1270	<	}
1271	<	}
1272	<	});
1273	<
1274	<	try {
1275	<	lock.writeLock().lock();
1276	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1277	<	lock.writeLock().unlock();
1278	<	t1.start();
1279	<	Thread.sleep(SHORT_DELAY_MS);
1280	<	t2.start();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1282	<	lock.writeLock().lock();
1283	<	assertTrue(lock.hasWaiters(c));
1284	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1285	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1286	<	c.signalAll();
1287	<	lock.writeLock().unlock();
1288	<	Thread.sleep(SHORT_DELAY_MS);
1289	<	lock.writeLock().lock();
1290	<	assertFalse(lock.hasWaiters(c));
1291	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1292	<	lock.writeLock().unlock();
1293	<	t1.join(SHORT_DELAY_MS);
1294	<	t2.join(SHORT_DELAY_MS);
1295	<	assertFalse(t1.isAlive());
1296	<	assertFalse(t2.isAlive());
1297	<	}
1298	<	catch (Exception ex) {
1299	<	unexpectedException();
1300	<	}
1246	>	Thread t1 = new Thread(new CheckedRunnable() {
1247	>	public void realRun() throws InterruptedException {
1248	>	lock.writeLock().lock();
1249	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1250	>	c.await();
1251	>	lock.writeLock().unlock();
1252	>	}});
1253	>
1254	>	Thread t2 = new Thread(new CheckedRunnable() {
1255	>	public void realRun() throws InterruptedException {
1256	>	lock.writeLock().lock();
1257	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1258	>	c.await();
1259	>	lock.writeLock().unlock();
1260	>	}});
1261	>
1262	>	lock.writeLock().lock();
1263	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1264	>	lock.writeLock().unlock();
1265	>	t1.start();
1266	>	Thread.sleep(SHORT_DELAY_MS);
1267	>	t2.start();
1268	>	Thread.sleep(SHORT_DELAY_MS);
1269	>	lock.writeLock().lock();
1270	>	assertTrue(lock.hasWaiters(c));
1271	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1272	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1273	>	c.signalAll();
1274	>	lock.writeLock().unlock();
1275	>	Thread.sleep(SHORT_DELAY_MS);
1276	>	lock.writeLock().lock();
1277	>	assertFalse(lock.hasWaiters(c));
1278	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1279	>	lock.writeLock().unlock();
1280	>	t1.join(SHORT_DELAY_MS);
1281	>	t2.join(SHORT_DELAY_MS);
1282	>	assertFalse(t1.isAlive());
1283	>	assertFalse(t2.isAlive());
1284	>	}
1285	>
1286	>	/**
1287	>	* toString indicates current lock state
1288	>	*/
1289	>	public void testToString() {
1290	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1291	>	String us = lock.toString();
1292	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1293	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1294	>	lock.writeLock().lock();
1295	>	String ws = lock.toString();
1296	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1297	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1298	>	lock.writeLock().unlock();
1299	>	lock.readLock().lock();
1300	>	lock.readLock().lock();
1301	>	String rs = lock.toString();
1302	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1303	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1304	>	}
1305	>
1306	>	/**
1307	>	* readLock.toString indicates current lock state
1308	>	*/
1309	>	public void testReadLockToString() {
1310	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1311	>	String us = lock.readLock().toString();
1312	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1313	>	lock.readLock().lock();
1314	>	lock.readLock().lock();
1315	>	String rs = lock.readLock().toString();
1316	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1317	>	}
1318	>
1319	>	/**
1320	>	* writeLock.toString indicates current lock state
1321	>	*/
1322	>	public void testWriteLockToString() {
1323	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1324	>	String us = lock.writeLock().toString();
1325	>	assertTrue(us.indexOf("Unlocked") >= 0);
1326	>	lock.writeLock().lock();
1327	>	String ls = lock.writeLock().toString();
1328	>	assertTrue(ls.indexOf("Locked") >= 0);
1329		}
1330
1331		}

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