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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.12 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.53 by jsr166, Mon May 2 00:49:26 2011 UTC

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

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