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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.32 by jsr166, Mon Nov 30 08:31:09 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.util.*;
14		import java.io.*;
15
16		public class ReentrantLockTest 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(ReentrantLockTest.class);
21	>	return new TestSuite(ReentrantLockTest.class);
22		}
23
24		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantLock lock;
29		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
30	<	public void run() {
31	<	try {
30	<	lock.lockInterruptibly();
31	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.lockInterruptibly();
32		}
33		}
34
#	Line 37 | Line 37 | public class ReentrantLockTest extends J
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantLock lock;
42		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	<	public void run() {
44	<	try {
45	<	lock.lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45		}
46		}
47
#	Line 53 | Line 50 | public class ReentrantLockTest extends J
50		*/
51		static class PublicReentrantLock extends ReentrantLock {
52		PublicReentrantLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55		}
56	<	public ConditionObject newCondition() {
57	<	return new PublicCondition();
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58		}
59
63	–	class PublicCondition extends ReentrantLock.ConditionObject {
64	–	PublicCondition() { }
65	–	public Collection<Thread> getWaitingThreads() {
66	–	return super.getWaitingThreads();
67	–	}
68	–	}
60
61		}
62
63		/**
64		* Constructor sets given fairness
65		*/
66	<	public void testConstructor() {
67	<	ReentrantLock rl = new ReentrantLock();
68	<	assertFalse(rl.isFair());
69	<	ReentrantLock r2 = new ReentrantLock(true);
79	<	assertTrue(r2.isFair());
66	>	public void testConstructor() {
67	>	assertFalse(new ReentrantLock().isFair());
68	>	assertFalse(new ReentrantLock(false).isFair());
69	>	assertTrue(new ReentrantLock(true).isFair());
70		}
71
72		/**
73		* locking an unlocked lock succeeds
74		*/
75	<	public void testLock() {
76	<	ReentrantLock rl = new ReentrantLock();
75	>	public void testLock() {
76	>	ReentrantLock rl = new ReentrantLock();
77		rl.lock();
78		assertTrue(rl.isLocked());
79		rl.unlock();
80	+	assertFalse(rl.isLocked());
81		}
82
83		/**
84		* locking an unlocked fair lock succeeds
85		*/
86	<	public void testFairLock() {
87	<	ReentrantLock rl = new ReentrantLock(true);
86	>	public void testFairLock() {
87	>	ReentrantLock rl = new ReentrantLock(true);
88		rl.lock();
89		assertTrue(rl.isLocked());
90		rl.unlock();
#	Line 102 | Line 93 | public class ReentrantLockTest extends J
93		/**
94		* Unlocking an unlocked lock throws IllegalMonitorStateException
95		*/
96	<	public void testUnlock_IllegalMonitorStateException() {
97	<	ReentrantLock rl = new ReentrantLock();
98	<	try {
99	<	rl.unlock();
100	<	shouldThrow();
101	<
111	<	} catch(IllegalMonitorStateException success){}
96	>	public void testUnlock_IllegalMonitorStateException() {
97	>	ReentrantLock rl = new ReentrantLock();
98	>	try {
99	>	rl.unlock();
100	>	shouldThrow();
101	>	} catch (IllegalMonitorStateException success) {}
102		}
103
104		/**
105	<	* trylock on an unlocked lock succeeds
105	>	* tryLock on an unlocked lock succeeds
106		*/
107	<	public void testTryLock() {
108	<	ReentrantLock rl = new ReentrantLock();
107	>	public void testTryLock() {
108	>	ReentrantLock rl = new ReentrantLock();
109		assertTrue(rl.tryLock());
110		assertTrue(rl.isLocked());
111		rl.unlock();
#	Line 123 | Line 113 | public class ReentrantLockTest extends J
113
114
115		/**
116	<	* getQueueLength reports number of waiting threads
116	>	* hasQueuedThreads reports whether there are waiting threads
117		*/
118	<	public void testGetQueueLength() {
119	<	final ReentrantLock lock = new ReentrantLock();
118	>	public void testhasQueuedThreads() throws InterruptedException {
119	>	final ReentrantLock lock = new ReentrantLock();
120		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
121		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
122	<	try {
123	<	assertEquals(0, lock.getQueueLength());
124	<	lock.lock();
125	<	t1.start();
126	<	Thread.sleep(SHORT_DELAY_MS);
127	<	assertEquals(1, lock.getQueueLength());
128	<	t2.start();
129	<	Thread.sleep(SHORT_DELAY_MS);
130	<	assertEquals(2, lock.getQueueLength());
131	<	t1.interrupt();
132	<	Thread.sleep(SHORT_DELAY_MS);
133	<	assertEquals(1, lock.getQueueLength());
134	<	lock.unlock();
135	<	Thread.sleep(SHORT_DELAY_MS);
136	<	assertEquals(0, lock.getQueueLength());
137	<	t1.join();
138	<	t2.join();
149	<	} catch(Exception e){
150	<	unexpectedException();
151	<	}
152	<	}
122	>	assertFalse(lock.hasQueuedThreads());
123	>	lock.lock();
124	>	t1.start();
125	>	Thread.sleep(SHORT_DELAY_MS);
126	>	assertTrue(lock.hasQueuedThreads());
127	>	t2.start();
128	>	Thread.sleep(SHORT_DELAY_MS);
129	>	assertTrue(lock.hasQueuedThreads());
130	>	t1.interrupt();
131	>	Thread.sleep(SHORT_DELAY_MS);
132	>	assertTrue(lock.hasQueuedThreads());
133	>	lock.unlock();
134	>	Thread.sleep(SHORT_DELAY_MS);
135	>	assertFalse(lock.hasQueuedThreads());
136	>	t1.join();
137	>	t2.join();
138	>	}
139
140		/**
141	<	* getQueuedThreads includes waiting threads
141	>	* getQueueLength reports number of waiting threads
142		*/
143	<	public void testGetQueuedThreads() {
144	<	final PublicReentrantLock lock = new PublicReentrantLock();
143	>	public void testGetQueueLength() throws InterruptedException {
144	>	final ReentrantLock lock = new ReentrantLock();
145		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
146		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
147	<	try {
148	<	assertTrue(lock.getQueuedThreads().isEmpty());
149	<	lock.lock();
150	<	assertTrue(lock.getQueuedThreads().isEmpty());
151	<	t1.start();
152	<	Thread.sleep(SHORT_DELAY_MS);
153	<	assertTrue(lock.getQueuedThreads().contains(t1));
154	<	t2.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
156	<	assertTrue(lock.getQueuedThreads().contains(t1));
157	<	assertTrue(lock.getQueuedThreads().contains(t2));
158	<	t1.interrupt();
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	assertFalse(lock.getQueuedThreads().contains(t1));
161	<	assertTrue(lock.getQueuedThreads().contains(t2));
162	<	lock.unlock();
163	<	Thread.sleep(SHORT_DELAY_MS);
178	<	assertTrue(lock.getQueuedThreads().isEmpty());
179	<	t1.join();
180	<	t2.join();
181	<	} catch(Exception e){
182	<	unexpectedException();
183	<	}
184	<	}
185	<
147	>	assertEquals(0, lock.getQueueLength());
148	>	lock.lock();
149	>	t1.start();
150	>	Thread.sleep(SHORT_DELAY_MS);
151	>	assertEquals(1, lock.getQueueLength());
152	>	t2.start();
153	>	Thread.sleep(SHORT_DELAY_MS);
154	>	assertEquals(2, lock.getQueueLength());
155	>	t1.interrupt();
156	>	Thread.sleep(SHORT_DELAY_MS);
157	>	assertEquals(1, lock.getQueueLength());
158	>	lock.unlock();
159	>	Thread.sleep(SHORT_DELAY_MS);
160	>	assertEquals(0, lock.getQueueLength());
161	>	t1.join();
162	>	t2.join();
163	>	}
164
165		/**
166	<	* timed trylock is interruptible.
166	>	* getQueueLength reports number of waiting threads
167		*/
168	<	public void testInterruptedException2() {
169	<	final ReentrantLock lock = new ReentrantLock();
170	<	lock.lock();
171	<	Thread t = new Thread(new Runnable() {
172	<	public void run() {
173	<	try {
174	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
175	<	threadShouldThrow();
176	<	} catch(InterruptedException success){}
177	<	}
178	<	});
179	<	try {
180	<	t.start();
181	<	t.interrupt();
182	<	} catch(Exception e){
183	<	unexpectedException();
184	<	}
168	>	public void testGetQueueLength_fair() throws InterruptedException {
169	>	final ReentrantLock lock = new ReentrantLock(true);
170	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
171	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
172	>	assertEquals(0, lock.getQueueLength());
173	>	lock.lock();
174	>	t1.start();
175	>	Thread.sleep(SHORT_DELAY_MS);
176	>	assertEquals(1, lock.getQueueLength());
177	>	t2.start();
178	>	Thread.sleep(SHORT_DELAY_MS);
179	>	assertEquals(2, lock.getQueueLength());
180	>	t1.interrupt();
181	>	Thread.sleep(SHORT_DELAY_MS);
182	>	assertEquals(1, lock.getQueueLength());
183	>	lock.unlock();
184	>	Thread.sleep(SHORT_DELAY_MS);
185	>	assertEquals(0, lock.getQueueLength());
186	>	t1.join();
187	>	t2.join();
188		}
189
209	–
190		/**
191	<	* Trylock on a locked lock fails
191	>	* hasQueuedThread(null) throws NPE
192		*/
193	<	public void testTryLockWhenLocked() {
194	<	final ReentrantLock lock = new ReentrantLock();
215	<	lock.lock();
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	threadAssertFalse(lock.tryLock());
219	<	}
220	<	});
193	>	public void testHasQueuedThreadNPE() {
194	>	final ReentrantLock sync = new ReentrantLock();
195		try {
196	<	t.start();
197	<	t.join();
198	<	lock.unlock();
199	<	} catch(Exception e){
226	<	unexpectedException();
227	<	}
228	<	}
196	>	sync.hasQueuedThread(null);
197	>	shouldThrow();
198	>	} catch (NullPointerException success) {}
199	>	}
200
201		/**
202	<	* Timed trylock on a locked lock times out
202	>	* hasQueuedThread reports whether a thread is queued.
203		*/
204	<	public void testTryLock_Timeout() {
205	<	final ReentrantLock lock = new ReentrantLock();
206	<	lock.lock();
207	<	Thread t = new Thread(new Runnable() {
208	<	public void run() {
209	<	try {
210	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
211	<	} catch (Exception ex) {
212	<	threadUnexpectedException();
213	<	}
214	<	}
215	<	});
216	<	try {
217	<	t.start();
218	<	t.join();
219	<	lock.unlock();
220	<	} catch(Exception e){
221	<	unexpectedException();
222	<	}
223	<	}
224	<
204	>	public void testHasQueuedThread() throws InterruptedException {
205	>	final ReentrantLock sync = new ReentrantLock();
206	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
207	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
208	>	assertFalse(sync.hasQueuedThread(t1));
209	>	assertFalse(sync.hasQueuedThread(t2));
210	>	sync.lock();
211	>	t1.start();
212	>	Thread.sleep(SHORT_DELAY_MS);
213	>	assertTrue(sync.hasQueuedThread(t1));
214	>	t2.start();
215	>	Thread.sleep(SHORT_DELAY_MS);
216	>	assertTrue(sync.hasQueuedThread(t1));
217	>	assertTrue(sync.hasQueuedThread(t2));
218	>	t1.interrupt();
219	>	Thread.sleep(SHORT_DELAY_MS);
220	>	assertFalse(sync.hasQueuedThread(t1));
221	>	assertTrue(sync.hasQueuedThread(t2));
222	>	sync.unlock();
223	>	Thread.sleep(SHORT_DELAY_MS);
224	>	assertFalse(sync.hasQueuedThread(t1));
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	assertFalse(sync.hasQueuedThread(t2));
227	>	t1.join();
228	>	t2.join();
229	>	}
230	>
231	>
232	>	/**
233	>	* getQueuedThreads includes waiting threads
234	>	*/
235	>	public void testGetQueuedThreads() throws InterruptedException {
236	>	final PublicReentrantLock lock = new PublicReentrantLock();
237	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
238	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
239	>	assertTrue(lock.getQueuedThreads().isEmpty());
240	>	lock.lock();
241	>	assertTrue(lock.getQueuedThreads().isEmpty());
242	>	t1.start();
243	>	Thread.sleep(SHORT_DELAY_MS);
244	>	assertTrue(lock.getQueuedThreads().contains(t1));
245	>	t2.start();
246	>	Thread.sleep(SHORT_DELAY_MS);
247	>	assertTrue(lock.getQueuedThreads().contains(t1));
248	>	assertTrue(lock.getQueuedThreads().contains(t2));
249	>	t1.interrupt();
250	>	Thread.sleep(SHORT_DELAY_MS);
251	>	assertFalse(lock.getQueuedThreads().contains(t1));
252	>	assertTrue(lock.getQueuedThreads().contains(t2));
253	>	lock.unlock();
254	>	Thread.sleep(SHORT_DELAY_MS);
255	>	assertTrue(lock.getQueuedThreads().isEmpty());
256	>	t1.join();
257	>	t2.join();
258	>	}
259	>
260	>
261	>	/**
262	>	* timed tryLock is interruptible.
263	>	*/
264	>	public void testInterruptedException2() throws InterruptedException {
265	>	final ReentrantLock lock = new ReentrantLock();
266	>	lock.lock();
267	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
268	>	public void realRun() throws InterruptedException {
269	>	lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS);
270	>	}});
271	>
272	>	t.start();
273	>	Thread.sleep(SHORT_DELAY_MS);
274	>	t.interrupt();
275	>	t.join();
276	>	}
277	>
278	>
279	>	/**
280	>	* TryLock on a locked lock fails
281	>	*/
282	>	public void testTryLockWhenLocked() throws InterruptedException {
283	>	final ReentrantLock lock = new ReentrantLock();
284	>	lock.lock();
285	>	Thread t = new Thread(new CheckedRunnable() {
286	>	public void realRun() {
287	>	threadAssertFalse(lock.tryLock());
288	>	}});
289	>
290	>	t.start();
291	>	t.join();
292	>	lock.unlock();
293	>	}
294	>
295	>	/**
296	>	* Timed tryLock on a locked lock times out
297	>	*/
298	>	public void testTryLock_Timeout() throws InterruptedException {
299	>	final ReentrantLock lock = new ReentrantLock();
300	>	lock.lock();
301	>	Thread t = new Thread(new CheckedRunnable() {
302	>	public void realRun() throws InterruptedException {
303	>	threadAssertFalse(lock.tryLock(1, MILLISECONDS));
304	>	}});
305	>
306	>	t.start();
307	>	t.join();
308	>	lock.unlock();
309	>	}
310	>
311		/**
312		* getHoldCount returns number of recursive holds
313		*/
314		public void testGetHoldCount() {
315	<	ReentrantLock lock = new ReentrantLock();
316	<	for(int i = 1; i <= SIZE; i++) {
317	<	lock.lock();
318	<	assertEquals(i,lock.getHoldCount());
319	<	}
320	<	for(int i = SIZE; i > 0; i--) {
321	<	lock.unlock();
322	<	assertEquals(i-1,lock.getHoldCount());
323	<	}
315	>	ReentrantLock lock = new ReentrantLock();
316	>	for (int i = 1; i <= SIZE; i++) {
317	>	lock.lock();
318	>	assertEquals(i, lock.getHoldCount());
319	>	}
320	>	for (int i = SIZE; i > 0; i--) {
321	>	lock.unlock();
322	>	assertEquals(i-1, lock.getHoldCount());
323	>	}
324		}
325	<
326	<
325	>
326	>
327		/**
328		* isLocked is true when locked and false when not
329		*/
330	<	public void testIsLocked() {
331	<	final ReentrantLock lock = new ReentrantLock();
332	<	lock.lock();
333	<	assertTrue(lock.isLocked());
334	<	lock.unlock();
335	<	assertFalse(lock.isLocked());
336	<	Thread t = new Thread(new Runnable() {
337	<	public void run() {
338	<	lock.lock();
339	<	try {
340	<	Thread.sleep(SMALL_DELAY_MS);
341	<	}
342	<	catch(Exception e) {
343	<	threadUnexpectedException();
344	<	}
345	<	lock.unlock();
346	<	}
347	<	});
291	<	try {
292	<	t.start();
293	<	Thread.sleep(SHORT_DELAY_MS);
294	<	assertTrue(lock.isLocked());
295	<	t.join();
296	<	assertFalse(lock.isLocked());
297	<	} catch(Exception e){
298	<	unexpectedException();
299	<	}
330	>	public void testIsLocked() throws InterruptedException {
331	>	final ReentrantLock lock = new ReentrantLock();
332	>	lock.lock();
333	>	assertTrue(lock.isLocked());
334	>	lock.unlock();
335	>	assertFalse(lock.isLocked());
336	>	Thread t = new Thread(new CheckedRunnable() {
337	>	public void realRun() throws InterruptedException {
338	>	lock.lock();
339	>	Thread.sleep(SMALL_DELAY_MS);
340	>	lock.unlock();
341	>	}});
342	>
343	>	t.start();
344	>	Thread.sleep(SHORT_DELAY_MS);
345	>	assertTrue(lock.isLocked());
346	>	t.join();
347	>	assertFalse(lock.isLocked());
348		}
349
350
351		/**
352		* lockInterruptibly is interruptible.
353		*/
354	<	public void testLockInterruptibly1() {
355	<	final ReentrantLock lock = new ReentrantLock();
356	<	lock.lock();
357	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
358	<	try {
359	<	t.start();
360	<	t.interrupt();
361	<	lock.unlock();
362	<	t.join();
363	<	} catch(Exception e){
364	<	unexpectedException();
317	<	}
318	<	}
354	>	public void testLockInterruptibly1() throws InterruptedException {
355	>	final ReentrantLock lock = new ReentrantLock();
356	>	lock.lock();
357	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
358	>	t.start();
359	>	Thread.sleep(SHORT_DELAY_MS);
360	>	t.interrupt();
361	>	Thread.sleep(SHORT_DELAY_MS);
362	>	lock.unlock();
363	>	t.join();
364	>	}
365
366		/**
367		* lockInterruptibly succeeds when unlocked, else is interruptible
368		*/
369	<	public void testLockInterruptibly2() {
370	<	final ReentrantLock lock = new ReentrantLock();
371	<	try {
372	<	lock.lockInterruptibly();
373	<	} catch(Exception e) {
374	<	unexpectedException();
375	<	}
376	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
377	<	try {
378	<	t.start();
333	<	t.interrupt();
334	<	assertTrue(lock.isLocked());
335	<	assertTrue(lock.isHeldByCurrentThread());
336	<	t.join();
337	<	} catch(Exception e){
338	<	unexpectedException();
339	<	}
369	>	public void testLockInterruptibly2() throws InterruptedException {
370	>	final ReentrantLock lock = new ReentrantLock();
371	>	lock.lockInterruptibly();
372	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
373	>	t.start();
374	>	Thread.sleep(SHORT_DELAY_MS);
375	>	t.interrupt();
376	>	assertTrue(lock.isLocked());
377	>	assertTrue(lock.isHeldByCurrentThread());
378	>	t.join();
379		}
380
381		/**
382		* Calling await without holding lock throws IllegalMonitorStateException
383		*/
384	<	public void testAwait_IllegalMonitor() {
385	<	final ReentrantLock lock = new ReentrantLock();
384	>	public void testAwait_IllegalMonitor() throws InterruptedException {
385	>	final ReentrantLock lock = new ReentrantLock();
386		final Condition c = lock.newCondition();
387		try {
388		c.await();
389		shouldThrow();
390	<	}
352	<	catch (IllegalMonitorStateException success) {
353	<	}
354	<	catch (Exception ex) {
355	<	unexpectedException();
356	<	}
390	>	} catch (IllegalMonitorStateException success) {}
391		}
392
393		/**
394		* Calling signal without holding lock throws IllegalMonitorStateException
395		*/
396		public void testSignal_IllegalMonitor() {
397	<	final ReentrantLock lock = new ReentrantLock();
397	>	final ReentrantLock lock = new ReentrantLock();
398		final Condition c = lock.newCondition();
399		try {
400		c.signal();
401		shouldThrow();
402	<	}
369	<	catch (IllegalMonitorStateException success) {
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
402	>	} catch (IllegalMonitorStateException success) {}
403		}
404
405		/**
406		* awaitNanos without a signal times out
407		*/
408	<	public void testAwaitNanos_Timeout() {
409	<	final ReentrantLock lock = new ReentrantLock();
408	>	public void testAwaitNanos_Timeout() throws InterruptedException {
409	>	final ReentrantLock lock = new ReentrantLock();
410		final Condition c = lock.newCondition();
411	<	try {
412	<	lock.lock();
413	<	long t = c.awaitNanos(100);
414	<	assertTrue(t <= 0);
386	<	lock.unlock();
387	<	}
388	<	catch (Exception ex) {
389	<	unexpectedException();
390	<	}
411	>	lock.lock();
412	>	long t = c.awaitNanos(100);
413	>	assertTrue(t <= 0);
414	>	lock.unlock();
415		}
416
417		/**
418		*  timed await without a signal times out
419		*/
420	<	public void testAwait_Timeout() {
421	<	final ReentrantLock lock = new ReentrantLock();
420	>	public void testAwait_Timeout() throws InterruptedException {
421	>	final ReentrantLock lock = new ReentrantLock();
422		final Condition c = lock.newCondition();
423	<	try {
424	<	lock.lock();
425	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
402	<	lock.unlock();
403	<	}
404	<	catch (Exception ex) {
405	<	unexpectedException();
406	<	}
423	>	lock.lock();
424	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
425	>	lock.unlock();
426		}
427
428		/**
429		* awaitUntil without a signal times out
430		*/
431	<	public void testAwaitUntil_Timeout() {
432	<	final ReentrantLock lock = new ReentrantLock();
431	>	public void testAwaitUntil_Timeout() throws InterruptedException {
432	>	final ReentrantLock lock = new ReentrantLock();
433		final Condition c = lock.newCondition();
434	<	try {
435	<	lock.lock();
436	<	java.util.Date d = new java.util.Date();
437	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
419	<	lock.unlock();
420	<	}
421	<	catch (Exception ex) {
422	<	unexpectedException();
423	<	}
434	>	lock.lock();
435	>	java.util.Date d = new java.util.Date();
436	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
437	>	lock.unlock();
438		}
439
440		/**
441		* await returns when signalled
442		*/
443	<	public void testAwait() {
444	<	final ReentrantLock lock = new ReentrantLock();
445	<	final ReentrantLock.ConditionObject c = lock.newCondition();
446	<	Thread t = new Thread(new Runnable() {
447	<	public void run() {
448	<	try {
449	<	lock.lock();
450	<	c.await();
451	<	lock.unlock();
438	<	}
439	<	catch(InterruptedException e) {
440	<	threadUnexpectedException();
441	<	}
442	<	}
443	<	});
443	>	public void testAwait() throws InterruptedException {
444	>	final ReentrantLock lock = new ReentrantLock();
445	>	final Condition c = lock.newCondition();
446	>	Thread t = new Thread(new CheckedRunnable() {
447	>	public void realRun() throws InterruptedException {
448	>	lock.lock();
449	>	c.await();
450	>	lock.unlock();
451	>	}});
452
453	+	t.start();
454	+	Thread.sleep(SHORT_DELAY_MS);
455	+	lock.lock();
456	+	c.signal();
457	+	lock.unlock();
458	+	t.join(SHORT_DELAY_MS);
459	+	assertFalse(t.isAlive());
460	+	}
461	+
462	+	/**
463	+	* hasWaiters throws NPE if null
464	+	*/
465	+	public void testHasWaitersNPE() {
466	+	final ReentrantLock lock = new ReentrantLock();
467		try {
468	<	t.start();
469	<	Thread.sleep(SHORT_DELAY_MS);
470	<	lock.lock();
449	<	c.signal();
450	<	lock.unlock();
451	<	t.join(SHORT_DELAY_MS);
452	<	assertFalse(t.isAlive());
453	<	}
454	<	catch (Exception ex) {
455	<	unexpectedException();
456	<	}
468	>	lock.hasWaiters(null);
469	>	shouldThrow();
470	>	} catch (NullPointerException success) {}
471		}
472
473		/**
474	<	* hasWaiters returns true when a thread is waiting, else false
474	>	* getWaitQueueLength throws NPE if null
475		*/
476	<	public void testHasWaiters() {
477	<	final ReentrantLock lock = new ReentrantLock();
478	<	final ReentrantLock.ConditionObject c = lock.newCondition();
479	<	Thread t = new Thread(new Runnable() {
480	<	public void run() {
481	<	try {
482	<	lock.lock();
483	<	threadAssertFalse(c.hasWaiters());
470	<	threadAssertEquals(0, c.getWaitQueueLength());
471	<	c.await();
472	<	lock.unlock();
473	<	}
474	<	catch(InterruptedException e) {
475	<	threadUnexpectedException();
476	<	}
477	<	}
478	<	});
476	>	public void testGetWaitQueueLengthNPE() {
477	>	final ReentrantLock lock = new ReentrantLock();
478	>	try {
479	>	lock.getWaitQueueLength(null);
480	>	shouldThrow();
481	>	} catch (NullPointerException success) {}
482	>	}
483	>
484
485	+	/**
486	+	* getWaitingThreads throws NPE if null
487	+	*/
488	+	public void testGetWaitingThreadsNPE() {
489	+	final PublicReentrantLock lock = new PublicReentrantLock();
490		try {
491	<	t.start();
492	<	Thread.sleep(SHORT_DELAY_MS);
493	<	lock.lock();
494	<	assertTrue(c.hasWaiters());
495	<	assertEquals(1, c.getWaitQueueLength());
496	<	c.signal();
497	<	lock.unlock();
498	<	Thread.sleep(SHORT_DELAY_MS);
499	<	lock.lock();
500	<	assertFalse(c.hasWaiters());
501	<	assertEquals(0, c.getWaitQueueLength());
502	<	lock.unlock();
503	<	t.join(SHORT_DELAY_MS);
504	<	assertFalse(t.isAlive());
505	<	}
506	<	catch (Exception ex) {
507	<	unexpectedException();
508	<	}
491	>	lock.getWaitingThreads(null);
492	>	shouldThrow();
493	>	} catch (NullPointerException success) {}
494	>	}
495	>
496	>
497	>	/**
498	>	* hasWaiters throws IAE if not owned
499	>	*/
500	>	public void testHasWaitersIAE() {
501	>	final ReentrantLock lock = new ReentrantLock();
502	>	final Condition c = lock.newCondition();
503	>	final ReentrantLock lock2 = new ReentrantLock();
504	>	try {
505	>	lock2.hasWaiters(c);
506	>	shouldThrow();
507	>	} catch (IllegalArgumentException success) {}
508	>	}
509	>
510	>	/**
511	>	* hasWaiters throws IMSE if not locked
512	>	*/
513	>	public void testHasWaitersIMSE() {
514	>	final ReentrantLock lock = new ReentrantLock();
515	>	final Condition c = lock.newCondition();
516	>	try {
517	>	lock.hasWaiters(c);
518	>	shouldThrow();
519	>	} catch (IllegalMonitorStateException success) {}
520	>	}
521	>
522	>
523	>	/**
524	>	* getWaitQueueLength throws IAE if not owned
525	>	*/
526	>	public void testGetWaitQueueLengthIAE() {
527	>	final ReentrantLock lock = new ReentrantLock();
528	>	final Condition c = lock.newCondition();
529	>	final ReentrantLock lock2 = new ReentrantLock();
530	>	try {
531	>	lock2.getWaitQueueLength(c);
532	>	shouldThrow();
533	>	} catch (IllegalArgumentException success) {}
534	>	}
535	>
536	>	/**
537	>	* getWaitQueueLength throws IMSE if not locked
538	>	*/
539	>	public void testGetWaitQueueLengthIMSE() {
540	>	final ReentrantLock lock = new ReentrantLock();
541	>	final Condition c = lock.newCondition();
542	>	try {
543	>	lock.getWaitQueueLength(c);
544	>	shouldThrow();
545	>	} catch (IllegalMonitorStateException success) {}
546	>	}
547	>
548	>
549	>	/**
550	>	* getWaitingThreads throws IAE if not owned
551	>	*/
552	>	public void testGetWaitingThreadsIAE() {
553	>	final PublicReentrantLock lock = new PublicReentrantLock();
554	>	final Condition c = lock.newCondition();
555	>	final PublicReentrantLock lock2 = new PublicReentrantLock();
556	>	try {
557	>	lock2.getWaitingThreads(c);
558	>	shouldThrow();
559	>	} catch (IllegalArgumentException success) {}
560	>	}
561	>
562	>	/**
563	>	* getWaitingThreads throws IMSE if not locked
564	>	*/
565	>	public void testGetWaitingThreadsIMSE() {
566	>	final PublicReentrantLock lock = new PublicReentrantLock();
567	>	final Condition c = lock.newCondition();
568	>	try {
569	>	lock.getWaitingThreads(c);
570	>	shouldThrow();
571	>	} catch (IllegalMonitorStateException success) {}
572	>	}
573	>
574	>
575	>	/**
576	>	* hasWaiters returns true when a thread is waiting, else false
577	>	*/
578	>	public void testHasWaiters() throws InterruptedException {
579	>	final ReentrantLock lock = new ReentrantLock();
580	>	final Condition c = lock.newCondition();
581	>	Thread t = new Thread(new CheckedRunnable() {
582	>	public void realRun() throws InterruptedException {
583	>	lock.lock();
584	>	threadAssertFalse(lock.hasWaiters(c));
585	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
586	>	c.await();
587	>	lock.unlock();
588	>	}});
589	>
590	>	t.start();
591	>	Thread.sleep(SHORT_DELAY_MS);
592	>	lock.lock();
593	>	assertTrue(lock.hasWaiters(c));
594	>	assertEquals(1, lock.getWaitQueueLength(c));
595	>	c.signal();
596	>	lock.unlock();
597	>	Thread.sleep(SHORT_DELAY_MS);
598	>	lock.lock();
599	>	assertFalse(lock.hasWaiters(c));
600	>	assertEquals(0, lock.getWaitQueueLength(c));
601	>	lock.unlock();
602	>	t.join(SHORT_DELAY_MS);
603	>	assertFalse(t.isAlive());
604		}
605
606		/**
607		* getWaitQueueLength returns number of waiting threads
608		*/
609	<	public void testGetWaitQueueLength() {
610	<	final ReentrantLock lock = new ReentrantLock();
611	<	final ReentrantLock.ConditionObject c = lock.newCondition();
612	<	Thread t1 = new Thread(new Runnable() {
613	<	public void run() {
614	<	try {
615	<	lock.lock();
616	<	threadAssertFalse(c.hasWaiters());
617	<	threadAssertEquals(0, c.getWaitQueueLength());
618	<	c.await();
619	<	lock.unlock();
620	<	}
621	<	catch(InterruptedException e) {
622	<	threadUnexpectedException();
623	<	}
624	<	}
625	<	});
626	<
627	<	Thread t2 = new Thread(new Runnable() {
628	<	public void run() {
629	<	try {
630	<	lock.lock();
631	<	threadAssertTrue(c.hasWaiters());
632	<	threadAssertEquals(1, c.getWaitQueueLength());
633	<	c.await();
634	<	lock.unlock();
635	<	}
636	<	catch(InterruptedException e) {
637	<	threadUnexpectedException();
638	<	}
639	<	}
640	<	});
641	<
642	<	try {
643	<	t1.start();
644	<	Thread.sleep(SHORT_DELAY_MS);
645	<	t2.start();
646	<	Thread.sleep(SHORT_DELAY_MS);
647	<	lock.lock();
543	<	assertTrue(c.hasWaiters());
544	<	assertEquals(2, c.getWaitQueueLength());
545	<	c.signalAll();
546	<	lock.unlock();
547	<	Thread.sleep(SHORT_DELAY_MS);
548	<	lock.lock();
549	<	assertFalse(c.hasWaiters());
550	<	assertEquals(0, c.getWaitQueueLength());
551	<	lock.unlock();
552	<	t1.join(SHORT_DELAY_MS);
553	<	t2.join(SHORT_DELAY_MS);
554	<	assertFalse(t1.isAlive());
555	<	assertFalse(t2.isAlive());
556	<	}
557	<	catch (Exception ex) {
558	<	unexpectedException();
559	<	}
609	>	public void testGetWaitQueueLength() throws InterruptedException {
610	>	final ReentrantLock lock = new ReentrantLock();
611	>	final Condition c = lock.newCondition();
612	>	Thread t1 = new Thread(new CheckedRunnable() {
613	>	public void realRun() throws InterruptedException {
614	>	lock.lock();
615	>	threadAssertFalse(lock.hasWaiters(c));
616	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
617	>	c.await();
618	>	lock.unlock();
619	>	}});
620	>
621	>	Thread t2 = new Thread(new CheckedRunnable() {
622	>	public void realRun() throws InterruptedException {
623	>	lock.lock();
624	>	threadAssertTrue(lock.hasWaiters(c));
625	>	threadAssertEquals(1, lock.getWaitQueueLength(c));
626	>	c.await();
627	>	lock.unlock();
628	>	}});
629	>
630	>	t1.start();
631	>	Thread.sleep(SHORT_DELAY_MS);
632	>	t2.start();
633	>	Thread.sleep(SHORT_DELAY_MS);
634	>	lock.lock();
635	>	assertTrue(lock.hasWaiters(c));
636	>	assertEquals(2, lock.getWaitQueueLength(c));
637	>	c.signalAll();
638	>	lock.unlock();
639	>	Thread.sleep(SHORT_DELAY_MS);
640	>	lock.lock();
641	>	assertFalse(lock.hasWaiters(c));
642	>	assertEquals(0, lock.getWaitQueueLength(c));
643	>	lock.unlock();
644	>	t1.join(SHORT_DELAY_MS);
645	>	t2.join(SHORT_DELAY_MS);
646	>	assertFalse(t1.isAlive());
647	>	assertFalse(t2.isAlive());
648		}
649
650		/**
651		* getWaitingThreads returns only and all waiting threads
652		*/
653	<	public void testGetWaitingThreads() {
654	<	final PublicReentrantLock lock = new PublicReentrantLock();
655	<	final PublicReentrantLock.PublicCondition c = (PublicReentrantLock.PublicCondition)lock.newCondition();
656	<	Thread t1 = new Thread(new Runnable() {
657	<	public void run() {
658	<	try {
659	<	lock.lock();
660	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
661	<	c.await();
662	<	lock.unlock();
663	<	}
664	<	catch(InterruptedException e) {
665	<	threadUnexpectedException();
666	<	}
667	<	}
668	<	});
669	<
670	<	Thread t2 = new Thread(new Runnable() {
671	<	public void run() {
672	<	try {
673	<	lock.lock();
674	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
675	<	c.await();
676	<	lock.unlock();
677	<	}
678	<	catch(InterruptedException e) {
679	<	threadUnexpectedException();
680	<	}
681	<	}
682	<	});
653	>	public void testGetWaitingThreads() throws InterruptedException {
654	>	final PublicReentrantLock lock = new PublicReentrantLock();
655	>	final Condition c = lock.newCondition();
656	>	Thread t1 = new Thread(new CheckedRunnable() {
657	>	public void realRun() throws InterruptedException {
658	>	lock.lock();
659	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
660	>	c.await();
661	>	lock.unlock();
662	>	}});
663	>
664	>	Thread t2 = new Thread(new CheckedRunnable() {
665	>	public void realRun() throws InterruptedException {
666	>	lock.lock();
667	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
668	>	c.await();
669	>	lock.unlock();
670	>	}});
671	>
672	>	lock.lock();
673	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
674	>	lock.unlock();
675	>	t1.start();
676	>	Thread.sleep(SHORT_DELAY_MS);
677	>	t2.start();
678	>	Thread.sleep(SHORT_DELAY_MS);
679	>	lock.lock();
680	>	assertTrue(lock.hasWaiters(c));
681	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
682	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
683	>	c.signalAll();
684	>	lock.unlock();
685	>	Thread.sleep(SHORT_DELAY_MS);
686	>	lock.lock();
687	>	assertFalse(lock.hasWaiters(c));
688	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
689	>	lock.unlock();
690	>	t1.join(SHORT_DELAY_MS);
691	>	t2.join(SHORT_DELAY_MS);
692	>	assertFalse(t1.isAlive());
693	>	assertFalse(t2.isAlive());
694	>	}
695	>
696	>	/** A helper class for uninterruptible wait tests */
697	>	class UninterruptibleThread extends Thread {
698	>	private ReentrantLock lock;
699	>	private Condition c;
700	>
701	>	public volatile boolean canAwake = false;
702	>	public volatile boolean interrupted = false;
703	>	public volatile boolean lockStarted = false;
704	>
705	>	public UninterruptibleThread(ReentrantLock lock, Condition c) {
706	>	this.lock = lock;
707	>	this.c = c;
708	>	}
709
710	<	try {
597	<	lock.lock();
598	<	assertTrue(c.getWaitingThreads().isEmpty());
599	<	lock.unlock();
600	<	t1.start();
601	<	Thread.sleep(SHORT_DELAY_MS);
602	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	lock.lock();
605	<	assertTrue(c.hasWaiters());
606	<	assertTrue(c.getWaitingThreads().contains(t1));
607	<	assertTrue(c.getWaitingThreads().contains(t2));
608	<	c.signalAll();
609	<	lock.unlock();
610	<	Thread.sleep(SHORT_DELAY_MS);
710	>	public synchronized void run() {
711		lock.lock();
712	<	assertFalse(c.hasWaiters());
713	<	assertTrue(c.getWaitingThreads().isEmpty());
712	>	lockStarted = true;
713	>
714	>	while (!canAwake) {
715	>	c.awaitUninterruptibly();
716	>	}
717	>
718	>	interrupted = isInterrupted();
719		lock.unlock();
615	–	t1.join(SHORT_DELAY_MS);
616	–	t2.join(SHORT_DELAY_MS);
617	–	assertFalse(t1.isAlive());
618	–	assertFalse(t2.isAlive());
619	–	}
620	–	catch (Exception ex) {
621	–	unexpectedException();
720		}
721		}
722
723		/**
724		* awaitUninterruptibly doesn't abort on interrupt
725		*/
726	<	public void testAwaitUninterruptibly() {
727	<	final ReentrantLock lock = new ReentrantLock();
726	>	public void testAwaitUninterruptibly() throws InterruptedException {
727	>	final ReentrantLock lock = new ReentrantLock();
728		final Condition c = lock.newCondition();
729	<	Thread t = new Thread(new Runnable() {
730	<	public void run() {
731	<	lock.lock();
634	<	c.awaitUninterruptibly();
635	<	lock.unlock();
636	<	}
637	<	});
729	>	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
730	>
731	>	thread.start();
732
733	+	while (!thread.lockStarted) {
734	+	Thread.sleep(100);
735	+	}
736	+
737	+	lock.lock();
738		try {
739	<	t.start();
740	<	Thread.sleep(SHORT_DELAY_MS);
642	<	t.interrupt();
643	<	lock.lock();
739	>	thread.interrupt();
740	>	thread.canAwake = true;
741		c.signal();
742	+	} finally {
743		lock.unlock();
646	–	assert(t.isInterrupted());
647	–	t.join(SHORT_DELAY_MS);
648	–	assertFalse(t.isAlive());
649	–	}
650	–	catch (Exception ex) {
651	–	unexpectedException();
744		}
745	+
746	+	thread.join();
747	+	assertTrue(thread.interrupted);
748	+	assertFalse(thread.isAlive());
749		}
750
751		/**
752		* await is interruptible
753		*/
754	<	public void testAwait_Interrupt() {
755	<	final ReentrantLock lock = new ReentrantLock();
754	>	public void testAwait_Interrupt() throws InterruptedException {
755	>	final ReentrantLock lock = new ReentrantLock();
756		final Condition c = lock.newCondition();
757	<	Thread t = new Thread(new Runnable() {
758	<	public void run() {
759	<	try {
760	<	lock.lock();
761	<	c.await();
762	<	lock.unlock();
763	<	threadShouldThrow();
764	<	}
765	<	catch(InterruptedException success) {
766	<	}
767	<	}
672	<	});
673	<
674	<	try {
675	<	t.start();
676	<	Thread.sleep(SHORT_DELAY_MS);
677	<	t.interrupt();
678	<	t.join(SHORT_DELAY_MS);
679	<	assertFalse(t.isAlive());
680	<	}
681	<	catch (Exception ex) {
682	<	unexpectedException();
683	<	}
757	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
758	>	public void realRun() throws InterruptedException {
759	>	lock.lock();
760	>	c.await();
761	>	}});
762	>
763	>	t.start();
764	>	Thread.sleep(SHORT_DELAY_MS);
765	>	t.interrupt();
766	>	t.join(SHORT_DELAY_MS);
767	>	assertFalse(t.isAlive());
768		}
769
770		/**
771		* awaitNanos is interruptible
772		*/
773	<	public void testAwaitNanos_Interrupt() {
774	<	final ReentrantLock lock = new ReentrantLock();
773	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
774	>	final ReentrantLock lock = new ReentrantLock();
775		final Condition c = lock.newCondition();
776	<	Thread t = new Thread(new Runnable() {
777	<	public void run() {
778	<	try {
779	<	lock.lock();
780	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
781	<	lock.unlock();
782	<	threadShouldThrow();
783	<	}
784	<	catch(InterruptedException success) {
785	<	}
786	<	}
703	<	});
704	<
705	<	try {
706	<	t.start();
707	<	Thread.sleep(SHORT_DELAY_MS);
708	<	t.interrupt();
709	<	t.join(SHORT_DELAY_MS);
710	<	assertFalse(t.isAlive());
711	<	}
712	<	catch (Exception ex) {
713	<	unexpectedException();
714	<	}
776	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
777	>	public void realRun() throws InterruptedException {
778	>	lock.lock();
779	>	c.awaitNanos(LONG_DELAY_MS * 1000L * 1000L);
780	>	}});
781	>
782	>	t.start();
783	>	Thread.sleep(SHORT_DELAY_MS);
784	>	t.interrupt();
785	>	t.join(SHORT_DELAY_MS);
786	>	assertFalse(t.isAlive());
787		}
788
789		/**
790		* awaitUntil is interruptible
791		*/
792	<	public void testAwaitUntil_Interrupt() {
793	<	final ReentrantLock lock = new ReentrantLock();
792	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
793	>	final ReentrantLock lock = new ReentrantLock();
794		final Condition c = lock.newCondition();
795	<	Thread t = new Thread(new Runnable() {
796	<	public void run() {
797	<	try {
798	<	lock.lock();
799	<	java.util.Date d = new java.util.Date();
800	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
801	<	lock.unlock();
802	<	threadShouldThrow();
803	<	}
804	<	catch(InterruptedException success) {
805	<	}
806	<	}
735	<	});
736	<
737	<	try {
738	<	t.start();
739	<	Thread.sleep(SHORT_DELAY_MS);
740	<	t.interrupt();
741	<	t.join(SHORT_DELAY_MS);
742	<	assertFalse(t.isAlive());
743	<	}
744	<	catch (Exception ex) {
745	<	unexpectedException();
746	<	}
795	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
796	>	public void realRun() throws InterruptedException {
797	>	lock.lock();
798	>	java.util.Date d = new java.util.Date();
799	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
800	>	}});
801	>
802	>	t.start();
803	>	Thread.sleep(SHORT_DELAY_MS);
804	>	t.interrupt();
805	>	t.join(SHORT_DELAY_MS);
806	>	assertFalse(t.isAlive());
807		}
808
809		/**
810		* signalAll wakes up all threads
811		*/
812	<	public void testSignalAll() {
813	<	final ReentrantLock lock = new ReentrantLock();
812	>	public void testSignalAll() throws InterruptedException {
813	>	final ReentrantLock lock = new ReentrantLock();
814		final Condition c = lock.newCondition();
815	<	Thread t1 = new Thread(new Runnable() {
816	<	public void run() {
817	<	try {
818	<	lock.lock();
819	<	c.await();
820	<	lock.unlock();
821	<	}
822	<	catch(InterruptedException e) {
823	<	threadUnexpectedException();
824	<	}
825	<	}
826	<	});
827	<
828	<	Thread t2 = new Thread(new Runnable() {
829	<	public void run() {
830	<	try {
831	<	lock.lock();
832	<	c.await();
833	<	lock.unlock();
834	<	}
835	<	catch(InterruptedException e) {
836	<	threadUnexpectedException();
837	<	}
838	<	}
839	<	});
840	<
841	<	try {
842	<	t1.start();
843	<	t2.start();
844	<	Thread.sleep(SHORT_DELAY_MS);
845	<	lock.lock();
846	<	c.signalAll();
847	<	lock.unlock();
848	<	t1.join(SHORT_DELAY_MS);
849	<	t2.join(SHORT_DELAY_MS);
850	<	assertFalse(t1.isAlive());
851	<	assertFalse(t2.isAlive());
852	<	}
853	<	catch (Exception ex) {
854	<	unexpectedException();
855	<	}
815	>	Thread t1 = new Thread(new CheckedRunnable() {
816	>	public void realRun() throws InterruptedException {
817	>	lock.lock();
818	>	c.await();
819	>	lock.unlock();
820	>	}});
821	>
822	>	Thread t2 = new Thread(new CheckedRunnable() {
823	>	public void realRun() throws InterruptedException {
824	>	lock.lock();
825	>	c.await();
826	>	lock.unlock();
827	>	}});
828	>
829	>	t1.start();
830	>	t2.start();
831	>	Thread.sleep(SHORT_DELAY_MS);
832	>	lock.lock();
833	>	c.signalAll();
834	>	lock.unlock();
835	>	t1.join(SHORT_DELAY_MS);
836	>	t2.join(SHORT_DELAY_MS);
837	>	assertFalse(t1.isAlive());
838	>	assertFalse(t2.isAlive());
839	>	}
840	>
841	>	/**
842	>	* await after multiple reentrant locking preserves lock count
843	>	*/
844	>	public void testAwaitLockCount() throws InterruptedException {
845	>	final ReentrantLock lock = new ReentrantLock();
846	>	final Condition c = lock.newCondition();
847	>	Thread t1 = new Thread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.lock();
850	>	threadAssertEquals(1, lock.getHoldCount());
851	>	c.await();
852	>	threadAssertEquals(1, lock.getHoldCount());
853	>	lock.unlock();
854	>	}});
855	>
856	>	Thread t2 = new Thread(new CheckedRunnable() {
857	>	public void realRun() throws InterruptedException {
858	>	lock.lock();
859	>	lock.lock();
860	>	threadAssertEquals(2, lock.getHoldCount());
861	>	c.await();
862	>	threadAssertEquals(2, lock.getHoldCount());
863	>	lock.unlock();
864	>	lock.unlock();
865	>	}});
866	>
867	>	t1.start();
868	>	t2.start();
869	>	Thread.sleep(SHORT_DELAY_MS);
870	>	lock.lock();
871	>	c.signalAll();
872	>	lock.unlock();
873	>	t1.join(SHORT_DELAY_MS);
874	>	t2.join(SHORT_DELAY_MS);
875	>	assertFalse(t1.isAlive());
876	>	assertFalse(t2.isAlive());
877		}
878
879		/**
880		* A serialized lock deserializes as unlocked
881		*/
882	<	public void testSerialization() {
882	>	public void testSerialization() throws Exception {
883		ReentrantLock l = new ReentrantLock();
884		l.lock();
885		l.unlock();
886
887	<	try {
888	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
889	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
890	<	out.writeObject(l);
891	<	out.close();
892	<
893	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
894	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
895	<	ReentrantLock r = (ReentrantLock) in.readObject();
896	<	r.lock();
897	<	r.unlock();
898	<	} catch(Exception e){
899	<	e.printStackTrace();
900	<	unexpectedException();
901	<	}
887	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
888	>	ObjectOutputStream out =
889	>	new ObjectOutputStream(new BufferedOutputStream(bout));
890	>	out.writeObject(l);
891	>	out.close();
892	>
893	>	ByteArrayInputStream bin =
894	>	new ByteArrayInputStream(bout.toByteArray());
895	>	ObjectInputStream in =
896	>	new ObjectInputStream(new BufferedInputStream(bin));
897	>	ReentrantLock r = (ReentrantLock) in.readObject();
898	>	r.lock();
899	>	r.unlock();
900	>	}
901	>
902	>	/**
903	>	* toString indicates current lock state
904	>	*/
905	>	public void testToString() {
906	>	ReentrantLock lock = new ReentrantLock();
907	>	String us = lock.toString();
908	>	assertTrue(us.indexOf("Unlocked") >= 0);
909	>	lock.lock();
910	>	String ls = lock.toString();
911	>	assertTrue(ls.indexOf("Locked") >= 0);
912		}
913
914		}

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