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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 1.41 by jsr166, Sat May 7 02:51:33 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.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		}
62	–
63	–	class PublicCondition extends ReentrantLock.ConditionObject {
64	–	PublicCondition() { }
65	–	public Collection<Thread> getWaitingThreads() {
66	–	return super.getWaitingThreads();
67	–	}
68	–	}
69	–
59		}
60
61		/**
62		* Constructor sets given fairness
63		*/
64	<	public void testConstructor() {
65	<	ReentrantLock rl = new ReentrantLock();
66	<	assertFalse(rl.isFair());
67	<	ReentrantLock r2 = new ReentrantLock(true);
79	<	assertTrue(r2.isFair());
64	>	public void testConstructor() {
65	>	assertFalse(new ReentrantLock().isFair());
66	>	assertFalse(new ReentrantLock(false).isFair());
67	>	assertTrue(new ReentrantLock(true).isFair());
68		}
69
70		/**
71		* locking an unlocked lock succeeds
72		*/
73	<	public void testLock() {
74	<	ReentrantLock rl = new ReentrantLock();
73	>	public void testLock() {
74	>	ReentrantLock rl = new ReentrantLock();
75		rl.lock();
76		assertTrue(rl.isLocked());
77		rl.unlock();
78	+	assertFalse(rl.isLocked());
79		}
80
81		/**
82		* locking an unlocked fair lock succeeds
83		*/
84	<	public void testFairLock() {
85	<	ReentrantLock rl = new ReentrantLock(true);
84	>	public void testFairLock() {
85	>	ReentrantLock rl = new ReentrantLock(true);
86		rl.lock();
87		assertTrue(rl.isLocked());
88		rl.unlock();
#	Line 102 | Line 91 | public class ReentrantLockTest extends J
91		/**
92		* Unlocking an unlocked lock throws IllegalMonitorStateException
93		*/
94	<	public void testUnlock_IllegalMonitorStateException() {
95	<	ReentrantLock rl = new ReentrantLock();
96	<	try {
97	<	rl.unlock();
98	<	shouldThrow();
99	<
111	<	} catch(IllegalMonitorStateException success){}
94	>	public void testUnlock_IllegalMonitorStateException() {
95	>	ReentrantLock rl = new ReentrantLock();
96	>	try {
97	>	rl.unlock();
98	>	shouldThrow();
99	>	} catch (IllegalMonitorStateException success) {}
100		}
101
102		/**
103	<	* trylock on an unlocked lock succeeds
103	>	* tryLock on an unlocked lock succeeds
104		*/
105	<	public void testTryLock() {
106	<	ReentrantLock rl = new ReentrantLock();
105	>	public void testTryLock() {
106	>	ReentrantLock rl = new ReentrantLock();
107		assertTrue(rl.tryLock());
108		assertTrue(rl.isLocked());
109		rl.unlock();
#	Line 123 | Line 111 | public class ReentrantLockTest extends J
111
112
113		/**
114	+	* hasQueuedThreads reports whether there are waiting threads
115	+	*/
116	+	public void testhasQueuedThreads() throws InterruptedException {
117	+	final ReentrantLock lock = new ReentrantLock();
118	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
119	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
120	+	assertFalse(lock.hasQueuedThreads());
121	+	lock.lock();
122	+	t1.start();
123	+	delay(SHORT_DELAY_MS);
124	+	assertTrue(lock.hasQueuedThreads());
125	+	t2.start();
126	+	delay(SHORT_DELAY_MS);
127	+	assertTrue(lock.hasQueuedThreads());
128	+	t1.interrupt();
129	+	delay(SHORT_DELAY_MS);
130	+	assertTrue(lock.hasQueuedThreads());
131	+	lock.unlock();
132	+	delay(SHORT_DELAY_MS);
133	+	assertFalse(lock.hasQueuedThreads());
134	+	t1.join();
135	+	t2.join();
136	+	}
137	+
138	+	/**
139		* getQueueLength reports number of waiting threads
140		*/
141	<	public void testGetQueueLength() {
142	<	final ReentrantLock lock = new ReentrantLock();
141	>	public void testGetQueueLength() throws InterruptedException {
142	>	final ReentrantLock lock = new ReentrantLock();
143		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
144		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
145	+	assertEquals(0, lock.getQueueLength());
146	+	lock.lock();
147	+	t1.start();
148	+	delay(SHORT_DELAY_MS);
149	+	assertEquals(1, lock.getQueueLength());
150	+	t2.start();
151	+	delay(SHORT_DELAY_MS);
152	+	assertEquals(2, lock.getQueueLength());
153	+	t1.interrupt();
154	+	delay(SHORT_DELAY_MS);
155	+	assertEquals(1, lock.getQueueLength());
156	+	lock.unlock();
157	+	delay(SHORT_DELAY_MS);
158	+	assertEquals(0, lock.getQueueLength());
159	+	t1.join();
160	+	t2.join();
161	+	}
162	+
163	+	/**
164	+	* getQueueLength reports number of waiting threads
165	+	*/
166	+	public void testGetQueueLength_fair() throws InterruptedException {
167	+	final ReentrantLock lock = new ReentrantLock(true);
168	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
169	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
170	+	assertEquals(0, lock.getQueueLength());
171	+	lock.lock();
172	+	t1.start();
173	+	delay(SHORT_DELAY_MS);
174	+	assertEquals(1, lock.getQueueLength());
175	+	t2.start();
176	+	delay(SHORT_DELAY_MS);
177	+	assertEquals(2, lock.getQueueLength());
178	+	t1.interrupt();
179	+	delay(SHORT_DELAY_MS);
180	+	assertEquals(1, lock.getQueueLength());
181	+	lock.unlock();
182	+	delay(SHORT_DELAY_MS);
183	+	assertEquals(0, lock.getQueueLength());
184	+	t1.join();
185	+	t2.join();
186	+	}
187	+
188	+	/**
189	+	* hasQueuedThread(null) throws NPE
190	+	*/
191	+	public void testHasQueuedThreadNPE() {
192	+	final ReentrantLock sync = new ReentrantLock();
193		try {
194	<	assertEquals(0, lock.getQueueLength());
195	<	lock.lock();
196	<	t1.start();
197	<	Thread.sleep(SHORT_DELAY_MS);
198	<	assertEquals(1, lock.getQueueLength());
199	<	t2.start();
200	<	Thread.sleep(SHORT_DELAY_MS);
201	<	assertEquals(2, lock.getQueueLength());
202	<	t1.interrupt();
203	<	Thread.sleep(SHORT_DELAY_MS);
204	<	assertEquals(1, lock.getQueueLength());
205	<	lock.unlock();
206	<	Thread.sleep(SHORT_DELAY_MS);
207	<	assertEquals(0, lock.getQueueLength());
208	<	t1.join();
209	<	t2.join();
210	<	} catch(Exception e){
211	<	unexpectedException();
212	<	}
213	<	}
194	>	sync.hasQueuedThread(null);
195	>	shouldThrow();
196	>	} catch (NullPointerException success) {}
197	>	}
198	>
199	>	/**
200	>	* hasQueuedThread reports whether a thread is queued.
201	>	*/
202	>	public void testHasQueuedThread() throws InterruptedException {
203	>	final ReentrantLock sync = new ReentrantLock();
204	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
205	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
206	>	assertFalse(sync.hasQueuedThread(t1));
207	>	assertFalse(sync.hasQueuedThread(t2));
208	>	sync.lock();
209	>	t1.start();
210	>	delay(SHORT_DELAY_MS);
211	>	assertTrue(sync.hasQueuedThread(t1));
212	>	t2.start();
213	>	delay(SHORT_DELAY_MS);
214	>	assertTrue(sync.hasQueuedThread(t1));
215	>	assertTrue(sync.hasQueuedThread(t2));
216	>	t1.interrupt();
217	>	delay(SHORT_DELAY_MS);
218	>	assertFalse(sync.hasQueuedThread(t1));
219	>	assertTrue(sync.hasQueuedThread(t2));
220	>	sync.unlock();
221	>	delay(SHORT_DELAY_MS);
222	>	assertFalse(sync.hasQueuedThread(t1));
223	>	delay(SHORT_DELAY_MS);
224	>	assertFalse(sync.hasQueuedThread(t2));
225	>	t1.join();
226	>	t2.join();
227	>	}
228	>
229
230		/**
231		* getQueuedThreads includes waiting threads
232		*/
233	<	public void testGetQueuedThreads() {
234	<	final PublicReentrantLock lock = new PublicReentrantLock();
233	>	public void testGetQueuedThreads() throws InterruptedException {
234	>	final PublicReentrantLock lock = new PublicReentrantLock();
235		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
236		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
237	<	try {
238	<	assertTrue(lock.getQueuedThreads().isEmpty());
239	<	lock.lock();
240	<	assertTrue(lock.getQueuedThreads().isEmpty());
241	<	t1.start();
242	<	Thread.sleep(SHORT_DELAY_MS);
243	<	assertTrue(lock.getQueuedThreads().contains(t1));
244	<	t2.start();
245	<	Thread.sleep(SHORT_DELAY_MS);
246	<	assertTrue(lock.getQueuedThreads().contains(t1));
247	<	assertTrue(lock.getQueuedThreads().contains(t2));
248	<	t1.interrupt();
249	<	Thread.sleep(SHORT_DELAY_MS);
250	<	assertFalse(lock.getQueuedThreads().contains(t1));
251	<	assertTrue(lock.getQueuedThreads().contains(t2));
252	<	lock.unlock();
253	<	Thread.sleep(SHORT_DELAY_MS);
254	<	assertTrue(lock.getQueuedThreads().isEmpty());
255	<	t1.join();
256	<	t2.join();
181	<	} catch(Exception e){
182	<	unexpectedException();
183	<	}
184	<	}
237	>	assertTrue(lock.getQueuedThreads().isEmpty());
238	>	lock.lock();
239	>	assertTrue(lock.getQueuedThreads().isEmpty());
240	>	t1.start();
241	>	delay(SHORT_DELAY_MS);
242	>	assertTrue(lock.getQueuedThreads().contains(t1));
243	>	t2.start();
244	>	delay(SHORT_DELAY_MS);
245	>	assertTrue(lock.getQueuedThreads().contains(t1));
246	>	assertTrue(lock.getQueuedThreads().contains(t2));
247	>	t1.interrupt();
248	>	delay(SHORT_DELAY_MS);
249	>	assertFalse(lock.getQueuedThreads().contains(t1));
250	>	assertTrue(lock.getQueuedThreads().contains(t2));
251	>	lock.unlock();
252	>	delay(SHORT_DELAY_MS);
253	>	assertTrue(lock.getQueuedThreads().isEmpty());
254	>	t1.join();
255	>	t2.join();
256	>	}
257
258
259		/**
260	<	* timed trylock is interruptible.
260	>	* timed tryLock is interruptible.
261		*/
262	<	public void testInterruptedException2() {
263	<	final ReentrantLock lock = new ReentrantLock();
264	<	lock.lock();
265	<	Thread t = new Thread(new Runnable() {
266	<	public void run() {
267	<	try {
268	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
269	<	threadShouldThrow();
270	<	} catch(InterruptedException success){}
271	<	}
272	<	});
201	<	try {
202	<	t.start();
203	<	t.interrupt();
204	<	} catch(Exception e){
205	<	unexpectedException();
206	<	}
262	>	public void testInterruptedException2() throws InterruptedException {
263	>	final ReentrantLock lock = new ReentrantLock();
264	>	lock.lock();
265	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
266	>	public void realRun() throws InterruptedException {
267	>	lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS);
268	>	}});
269	>
270	>	delay(SHORT_DELAY_MS);
271	>	t.interrupt();
272	>	t.join();
273		}
274
275
276		/**
277	<	* Trylock on a locked lock fails
277	>	* TryLock on a locked lock fails
278		*/
279	<	public void testTryLockWhenLocked() {
280	<	final ReentrantLock lock = new ReentrantLock();
281	<	lock.lock();
282	<	Thread t = new Thread(new Runnable() {
283	<	public void run() {
284	<	threadAssertFalse(lock.tryLock());
285	<	}
286	<	});
287	<	try {
288	<	t.start();
289	<	t.join();
224	<	lock.unlock();
225	<	} catch(Exception e){
226	<	unexpectedException();
227	<	}
228	<	}
279	>	public void testTryLockWhenLocked() throws InterruptedException {
280	>	final ReentrantLock lock = new ReentrantLock();
281	>	lock.lock();
282	>	Thread t = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() {
284	>	assertFalse(lock.tryLock());
285	>	}});
286	>
287	>	t.join();
288	>	lock.unlock();
289	>	}
290
291		/**
292	<	* Timed trylock on a locked lock times out
292	>	* Timed tryLock on a locked lock times out
293		*/
294	<	public void testTryLock_Timeout() {
295	<	final ReentrantLock lock = new ReentrantLock();
296	<	lock.lock();
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	try {
300	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
301	<	} catch (Exception ex) {
302	<	threadUnexpectedException();
303	<	}
304	<	}
305	<	});
245	<	try {
246	<	t.start();
247	<	t.join();
248	<	lock.unlock();
249	<	} catch(Exception e){
250	<	unexpectedException();
251	<	}
252	<	}
253	<
294	>	public void testTryLock_Timeout() throws InterruptedException {
295	>	final ReentrantLock lock = new ReentrantLock();
296	>	lock.lock();
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() throws InterruptedException {
299	>	assertFalse(lock.tryLock(1, MILLISECONDS));
300	>	}});
301	>
302	>	t.join();
303	>	lock.unlock();
304	>	}
305	>
306		/**
307		* getHoldCount returns number of recursive holds
308		*/
309		public void testGetHoldCount() {
310	<	ReentrantLock lock = new ReentrantLock();
311	<	for(int i = 1; i <= SIZE; i++) {
312	<	lock.lock();
313	<	assertEquals(i,lock.getHoldCount());
314	<	}
315	<	for(int i = SIZE; i > 0; i--) {
316	<	lock.unlock();
317	<	assertEquals(i-1,lock.getHoldCount());
318	<	}
310	>	ReentrantLock lock = new ReentrantLock();
311	>	for (int i = 1; i <= SIZE; i++) {
312	>	lock.lock();
313	>	assertEquals(i, lock.getHoldCount());
314	>	}
315	>	for (int i = SIZE; i > 0; i--) {
316	>	lock.unlock();
317	>	assertEquals(i-1, lock.getHoldCount());
318	>	}
319		}
320	<
321	<
320	>
321	>
322		/**
323		* isLocked is true when locked and false when not
324		*/
325	<	public void testIsLocked() {
326	<	final ReentrantLock lock = new ReentrantLock();
327	<	lock.lock();
328	<	assertTrue(lock.isLocked());
329	<	lock.unlock();
330	<	assertFalse(lock.isLocked());
331	<	Thread t = new Thread(new Runnable() {
332	<	public void run() {
333	<	lock.lock();
334	<	try {
335	<	Thread.sleep(SMALL_DELAY_MS);
336	<	}
337	<	catch(Exception e) {
338	<	threadUnexpectedException();
339	<	}
340	<	lock.unlock();
341	<	}
290	<	});
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	<	}
325	>	public void testIsLocked() throws InterruptedException {
326	>	final ReentrantLock lock = new ReentrantLock();
327	>	lock.lock();
328	>	assertTrue(lock.isLocked());
329	>	lock.unlock();
330	>	assertFalse(lock.isLocked());
331	>	Thread t = newStartedThread(new CheckedRunnable() {
332	>	public void realRun() throws InterruptedException {
333	>	lock.lock();
334	>	delay(SMALL_DELAY_MS);
335	>	lock.unlock();
336	>	}});
337	>
338	>	delay(SHORT_DELAY_MS);
339	>	assertTrue(lock.isLocked());
340	>	t.join();
341	>	assertFalse(lock.isLocked());
342		}
343
344
345		/**
346		* lockInterruptibly is interruptible.
347		*/
348	<	public void testLockInterruptibly1() {
349	<	final ReentrantLock lock = new ReentrantLock();
350	<	lock.lock();
351	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
352	<	try {
353	<	t.start();
354	<	t.interrupt();
355	<	lock.unlock();
356	<	t.join();
357	<	} catch(Exception e){
316	<	unexpectedException();
317	<	}
318	<	}
348	>	public void testLockInterruptibly1() throws InterruptedException {
349	>	final ReentrantLock lock = new ReentrantLock();
350	>	lock.lock();
351	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
352	>	delay(SHORT_DELAY_MS);
353	>	t.interrupt();
354	>	delay(SHORT_DELAY_MS);
355	>	lock.unlock();
356	>	t.join();
357	>	}
358
359		/**
360		* lockInterruptibly succeeds when unlocked, else is interruptible
361		*/
362	<	public void testLockInterruptibly2() {
363	<	final ReentrantLock lock = new ReentrantLock();
364	<	try {
365	<	lock.lockInterruptibly();
366	<	} catch(Exception e) {
367	<	unexpectedException();
368	<	}
369	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
370	<	try {
332	<	t.start();
333	<	t.interrupt();
334	<	assertTrue(lock.isLocked());
335	<	assertTrue(lock.isHeldByCurrentThread());
336	<	t.join();
337	<	} catch(Exception e){
338	<	unexpectedException();
339	<	}
362	>	public void testLockInterruptibly2() throws InterruptedException {
363	>	final ReentrantLock lock = new ReentrantLock();
364	>	lock.lockInterruptibly();
365	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
366	>	delay(SHORT_DELAY_MS);
367	>	t.interrupt();
368	>	assertTrue(lock.isLocked());
369	>	assertTrue(lock.isHeldByCurrentThread());
370	>	t.join();
371		}
372
373		/**
374		* Calling await without holding lock throws IllegalMonitorStateException
375		*/
376	<	public void testAwait_IllegalMonitor() {
377	<	final ReentrantLock lock = new ReentrantLock();
376	>	public void testAwait_IllegalMonitor() throws InterruptedException {
377	>	final ReentrantLock lock = new ReentrantLock();
378		final Condition c = lock.newCondition();
379		try {
380		c.await();
381		shouldThrow();
382	<	}
352	<	catch (IllegalMonitorStateException success) {
353	<	}
354	<	catch (Exception ex) {
355	<	unexpectedException();
356	<	}
382	>	} catch (IllegalMonitorStateException success) {}
383		}
384
385		/**
386		* Calling signal without holding lock throws IllegalMonitorStateException
387		*/
388		public void testSignal_IllegalMonitor() {
389	<	final ReentrantLock lock = new ReentrantLock();
389	>	final ReentrantLock lock = new ReentrantLock();
390		final Condition c = lock.newCondition();
391		try {
392		c.signal();
393		shouldThrow();
394	<	}
369	<	catch (IllegalMonitorStateException success) {
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
394	>	} catch (IllegalMonitorStateException success) {}
395		}
396
397		/**
398		* awaitNanos without a signal times out
399		*/
400	<	public void testAwaitNanos_Timeout() {
401	<	final ReentrantLock lock = new ReentrantLock();
400	>	public void testAwaitNanos_Timeout() throws InterruptedException {
401	>	final ReentrantLock lock = new ReentrantLock();
402	>	final Condition c = lock.newCondition();
403	>	lock.lock();
404	>	long t = c.awaitNanos(100);
405	>	assertTrue(t <= 0);
406	>	lock.unlock();
407	>	}
408	>
409	>	/**
410	>	* timed await without a signal times out
411	>	*/
412	>	public void testAwait_Timeout() throws InterruptedException {
413	>	final ReentrantLock lock = new ReentrantLock();
414	>	final Condition c = lock.newCondition();
415	>	lock.lock();
416	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
417	>	lock.unlock();
418	>	}
419	>
420	>	/**
421	>	* awaitUntil without a signal times out
422	>	*/
423	>	public void testAwaitUntil_Timeout() throws InterruptedException {
424	>	final ReentrantLock lock = new ReentrantLock();
425	>	final Condition c = lock.newCondition();
426	>	lock.lock();
427	>	java.util.Date d = new java.util.Date();
428	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
429	>	lock.unlock();
430	>	}
431	>
432	>	/**
433	>	* await returns when signalled
434	>	*/
435	>	public void testAwait() throws InterruptedException {
436	>	final ReentrantLock lock = new ReentrantLock();
437		final Condition c = lock.newCondition();
438	+	Thread t = newStartedThread(new CheckedRunnable() {
439	+	public void realRun() throws InterruptedException {
440	+	lock.lock();
441	+	c.await();
442	+	lock.unlock();
443	+	}});
444	+
445	+	delay(SHORT_DELAY_MS);
446	+	lock.lock();
447	+	c.signal();
448	+	lock.unlock();
449	+	t.join(SHORT_DELAY_MS);
450	+	assertFalse(t.isAlive());
451	+	}
452	+
453	+	/**
454	+	* hasWaiters throws NPE if null
455	+	*/
456	+	public void testHasWaitersNPE() {
457	+	final ReentrantLock lock = new ReentrantLock();
458		try {
459	<	lock.lock();
460	<	long t = c.awaitNanos(100);
461	<	assertTrue(t <= 0);
462	<	lock.unlock();
463	<	}
464	<	catch (Exception ex) {
465	<	unexpectedException();
466	<	}
459	>	lock.hasWaiters(null);
460	>	shouldThrow();
461	>	} catch (NullPointerException success) {}
462	>	}
463	>
464	>	/**
465	>	* getWaitQueueLength throws NPE if null
466	>	*/
467	>	public void testGetWaitQueueLengthNPE() {
468	>	final ReentrantLock lock = new ReentrantLock();
469	>	try {
470	>	lock.getWaitQueueLength(null);
471	>	shouldThrow();
472	>	} catch (NullPointerException success) {}
473	>	}
474	>
475	>
476	>	/**
477	>	* getWaitingThreads throws NPE if null
478	>	*/
479	>	public void testGetWaitingThreadsNPE() {
480	>	final PublicReentrantLock lock = new PublicReentrantLock();
481	>	try {
482	>	lock.getWaitingThreads(null);
483	>	shouldThrow();
484	>	} catch (NullPointerException success) {}
485		}
486
487	+
488		/**
489	<	*  timed await without a signal times out
489	>	* hasWaiters throws IAE if not owned
490		*/
491	<	public void testAwait_Timeout() {
492	<	final ReentrantLock lock = new ReentrantLock();
491	>	public void testHasWaitersIAE() {
492	>	final ReentrantLock lock = new ReentrantLock();
493		final Condition c = lock.newCondition();
494	+	final ReentrantLock lock2 = new ReentrantLock();
495		try {
496	<	lock.lock();
497	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
498	<	lock.unlock();
403	<	}
404	<	catch (Exception ex) {
405	<	unexpectedException();
406	<	}
496	>	lock2.hasWaiters(c);
497	>	shouldThrow();
498	>	} catch (IllegalArgumentException success) {}
499		}
500
501		/**
502	<	* awaitUntil without a signal times out
502	>	* hasWaiters throws IMSE if not locked
503		*/
504	<	public void testAwaitUntil_Timeout() {
505	<	final ReentrantLock lock = new ReentrantLock();
504	>	public void testHasWaitersIMSE() {
505	>	final ReentrantLock lock = new ReentrantLock();
506		final Condition c = lock.newCondition();
507		try {
508	<	lock.lock();
509	<	java.util.Date d = new java.util.Date();
510	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
419	<	lock.unlock();
420	<	}
421	<	catch (Exception ex) {
422	<	unexpectedException();
423	<	}
508	>	lock.hasWaiters(c);
509	>	shouldThrow();
510	>	} catch (IllegalMonitorStateException success) {}
511		}
512
513	+
514		/**
515	<	* await returns when signalled
515	>	* getWaitQueueLength throws IAE if not owned
516		*/
517	<	public void testAwait() {
518	<	final ReentrantLock lock = new ReentrantLock();
519	<	final ReentrantLock.ConditionObject c = lock.newCondition();
520	<	Thread t = new Thread(new Runnable() {
521	<	public void run() {
522	<	try {
523	<	lock.lock();
524	<	c.await();
525	<	lock.unlock();
438	<	}
439	<	catch(InterruptedException e) {
440	<	threadUnexpectedException();
441	<	}
442	<	}
443	<	});
517	>	public void testGetWaitQueueLengthIAE() {
518	>	final ReentrantLock lock = new ReentrantLock();
519	>	final Condition c = lock.newCondition();
520	>	final ReentrantLock lock2 = new ReentrantLock();
521	>	try {
522	>	lock2.getWaitQueueLength(c);
523	>	shouldThrow();
524	>	} catch (IllegalArgumentException success) {}
525	>	}
526
527	+	/**
528	+	* getWaitQueueLength throws IMSE if not locked
529	+	*/
530	+	public void testGetWaitQueueLengthIMSE() {
531	+	final ReentrantLock lock = new ReentrantLock();
532	+	final Condition c = lock.newCondition();
533		try {
534	<	t.start();
535	<	Thread.sleep(SHORT_DELAY_MS);
536	<	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	<	}
534	>	lock.getWaitQueueLength(c);
535	>	shouldThrow();
536	>	} catch (IllegalMonitorStateException success) {}
537		}
538
539	+
540		/**
541	<	* hasWaiters returns true when a thread is waiting, else false
541	>	* getWaitingThreads throws IAE if not owned
542		*/
543	<	public void testHasWaiters() {
544	<	final ReentrantLock lock = new ReentrantLock();
545	<	final ReentrantLock.ConditionObject c = lock.newCondition();
546	<	Thread t = new Thread(new Runnable() {
547	<	public void run() {
548	<	try {
549	<	lock.lock();
550	<	threadAssertFalse(c.hasWaiters());
551	<	threadAssertEquals(0, c.getWaitQueueLength());
471	<	c.await();
472	<	lock.unlock();
473	<	}
474	<	catch(InterruptedException e) {
475	<	threadUnexpectedException();
476	<	}
477	<	}
478	<	});
543	>	public void testGetWaitingThreadsIAE() {
544	>	final PublicReentrantLock lock = new PublicReentrantLock();
545	>	final Condition c = lock.newCondition();
546	>	final PublicReentrantLock lock2 = new PublicReentrantLock();
547	>	try {
548	>	lock2.getWaitingThreads(c);
549	>	shouldThrow();
550	>	} catch (IllegalArgumentException success) {}
551	>	}
552
553	+	/**
554	+	* getWaitingThreads throws IMSE if not locked
555	+	*/
556	+	public void testGetWaitingThreadsIMSE() {
557	+	final PublicReentrantLock lock = new PublicReentrantLock();
558	+	final Condition c = lock.newCondition();
559		try {
560	<	t.start();
561	<	Thread.sleep(SHORT_DELAY_MS);
562	<	lock.lock();
563	<	assertTrue(c.hasWaiters());
564	<	assertEquals(1, c.getWaitQueueLength());
565	<	c.signal();
566	<	lock.unlock();
567	<	Thread.sleep(SHORT_DELAY_MS);
568	<	lock.lock();
569	<	assertFalse(c.hasWaiters());
570	<	assertEquals(0, c.getWaitQueueLength());
571	<	lock.unlock();
572	<	t.join(SHORT_DELAY_MS);
573	<	assertFalse(t.isAlive());
574	<	}
575	<	catch (Exception ex) {
576	<	unexpectedException();
577	<	}
560	>	lock.getWaitingThreads(c);
561	>	shouldThrow();
562	>	} catch (IllegalMonitorStateException success) {}
563	>	}
564	>
565	>
566	>	/**
567	>	* hasWaiters returns true when a thread is waiting, else false
568	>	*/
569	>	public void testHasWaiters() throws InterruptedException {
570	>	final ReentrantLock lock = new ReentrantLock();
571	>	final Condition c = lock.newCondition();
572	>	Thread t = newStartedThread(new CheckedRunnable() {
573	>	public void realRun() throws InterruptedException {
574	>	lock.lock();
575	>	assertFalse(lock.hasWaiters(c));
576	>	assertEquals(0, lock.getWaitQueueLength(c));
577	>	c.await();
578	>	lock.unlock();
579	>	}});
580	>
581	>	delay(SHORT_DELAY_MS);
582	>	lock.lock();
583	>	assertTrue(lock.hasWaiters(c));
584	>	assertEquals(1, lock.getWaitQueueLength(c));
585	>	c.signal();
586	>	lock.unlock();
587	>	delay(SHORT_DELAY_MS);
588	>	lock.lock();
589	>	assertFalse(lock.hasWaiters(c));
590	>	assertEquals(0, lock.getWaitQueueLength(c));
591	>	lock.unlock();
592	>	t.join(SHORT_DELAY_MS);
593	>	assertFalse(t.isAlive());
594		}
595
596		/**
597		* getWaitQueueLength returns number of waiting threads
598		*/
599	<	public void testGetWaitQueueLength() {
600	<	final ReentrantLock lock = new ReentrantLock();
601	<	final ReentrantLock.ConditionObject c = lock.newCondition();
602	<	Thread t1 = new Thread(new Runnable() {
603	<	public void run() {
604	<	try {
605	<	lock.lock();
606	<	threadAssertFalse(c.hasWaiters());
607	<	threadAssertEquals(0, c.getWaitQueueLength());
608	<	c.await();
609	<	lock.unlock();
610	<	}
611	<	catch(InterruptedException e) {
612	<	threadUnexpectedException();
613	<	}
614	<	}
615	<	});
616	<
617	<	Thread t2 = new Thread(new Runnable() {
618	<	public void run() {
619	<	try {
620	<	lock.lock();
621	<	threadAssertTrue(c.hasWaiters());
622	<	threadAssertEquals(1, c.getWaitQueueLength());
623	<	c.await();
624	<	lock.unlock();
625	<	}
626	<	catch(InterruptedException e) {
627	<	threadUnexpectedException();
628	<	}
629	<	}
630	<	});
631	<
632	<	try {
633	<	t1.start();
634	<	Thread.sleep(SHORT_DELAY_MS);
635	<	t2.start();
636	<	Thread.sleep(SHORT_DELAY_MS);
542	<	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	<	}
599	>	public void testGetWaitQueueLength() throws InterruptedException {
600	>	final ReentrantLock lock = new ReentrantLock();
601	>	final Condition c = lock.newCondition();
602	>	Thread t1 = newStartedThread(new CheckedRunnable() {
603	>	public void realRun() throws InterruptedException {
604	>	lock.lock();
605	>	assertFalse(lock.hasWaiters(c));
606	>	assertEquals(0, lock.getWaitQueueLength(c));
607	>	c.await();
608	>	lock.unlock();
609	>	}});
610	>
611	>	delay(SHORT_DELAY_MS);
612	>
613	>	Thread t2 = newStartedThread(new CheckedRunnable() {
614	>	public void realRun() throws InterruptedException {
615	>	lock.lock();
616	>	assertTrue(lock.hasWaiters(c));
617	>	assertEquals(1, lock.getWaitQueueLength(c));
618	>	c.await();
619	>	lock.unlock();
620	>	}});
621	>
622	>	delay(SHORT_DELAY_MS);
623	>	lock.lock();
624	>	assertTrue(lock.hasWaiters(c));
625	>	assertEquals(2, lock.getWaitQueueLength(c));
626	>	c.signalAll();
627	>	lock.unlock();
628	>	delay(SHORT_DELAY_MS);
629	>	lock.lock();
630	>	assertFalse(lock.hasWaiters(c));
631	>	assertEquals(0, lock.getWaitQueueLength(c));
632	>	lock.unlock();
633	>	t1.join(SHORT_DELAY_MS);
634	>	t2.join(SHORT_DELAY_MS);
635	>	assertFalse(t1.isAlive());
636	>	assertFalse(t2.isAlive());
637		}
638
639		/**
640		* getWaitingThreads returns only and all waiting threads
641		*/
642	<	public void testGetWaitingThreads() {
643	<	final PublicReentrantLock lock = new PublicReentrantLock();
644	<	final PublicReentrantLock.PublicCondition c = (PublicReentrantLock.PublicCondition)lock.newCondition();
645	<	Thread t1 = new Thread(new Runnable() {
646	<	public void run() {
647	<	try {
648	<	lock.lock();
649	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
650	<	c.await();
651	<	lock.unlock();
652	<	}
653	<	catch(InterruptedException e) {
654	<	threadUnexpectedException();
655	<	}
656	<	}
657	<	});
658	<
659	<	Thread t2 = new Thread(new Runnable() {
660	<	public void run() {
661	<	try {
662	<	lock.lock();
663	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
664	<	c.await();
665	<	lock.unlock();
666	<	}
667	<	catch(InterruptedException e) {
668	<	threadUnexpectedException();
669	<	}
670	<	}
671	<	});
642	>	public void testGetWaitingThreads() throws InterruptedException {
643	>	final PublicReentrantLock lock = new PublicReentrantLock();
644	>	final Condition c = lock.newCondition();
645	>	Thread t1 = new Thread(new CheckedRunnable() {
646	>	public void realRun() throws InterruptedException {
647	>	lock.lock();
648	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
649	>	c.await();
650	>	lock.unlock();
651	>	}});
652	>
653	>	Thread t2 = new Thread(new CheckedRunnable() {
654	>	public void realRun() throws InterruptedException {
655	>	lock.lock();
656	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
657	>	c.await();
658	>	lock.unlock();
659	>	}});
660	>
661	>	lock.lock();
662	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
663	>	lock.unlock();
664	>	t1.start();
665	>	delay(SHORT_DELAY_MS);
666	>	t2.start();
667	>	delay(SHORT_DELAY_MS);
668	>	lock.lock();
669	>	assertTrue(lock.hasWaiters(c));
670	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
671	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
672	>	c.signalAll();
673	>	lock.unlock();
674	>	delay(SHORT_DELAY_MS);
675	>	lock.lock();
676	>	assertFalse(lock.hasWaiters(c));
677	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
678	>	lock.unlock();
679	>	t1.join(SHORT_DELAY_MS);
680	>	t2.join(SHORT_DELAY_MS);
681	>	assertFalse(t1.isAlive());
682	>	assertFalse(t2.isAlive());
683	>	}
684	>
685	>	/** A helper class for uninterruptible wait tests */
686	>	class UninterruptibleThread extends Thread {
687	>	private ReentrantLock lock;
688	>	private Condition c;
689	>
690	>	public volatile boolean canAwake = false;
691	>	public volatile boolean interrupted = false;
692	>	public volatile boolean lockStarted = false;
693	>
694	>	public UninterruptibleThread(ReentrantLock lock, Condition c) {
695	>	this.lock = lock;
696	>	this.c = c;
697	>	}
698
699	<	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);
699	>	public synchronized void run() {
700		lock.lock();
701	<	assertTrue(c.hasWaiters());
702	<	assertTrue(c.getWaitingThreads().contains(t1));
703	<	assertTrue(c.getWaitingThreads().contains(t2));
704	<	c.signalAll();
705	<	lock.unlock();
706	<	Thread.sleep(SHORT_DELAY_MS);
707	<	lock.lock();
612	<	assertFalse(c.hasWaiters());
613	<	assertTrue(c.getWaitingThreads().isEmpty());
701	>	lockStarted = true;
702	>
703	>	while (!canAwake) {
704	>	c.awaitUninterruptibly();
705	>	}
706	>
707	>	interrupted = isInterrupted();
708		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();
709		}
710		}
711
712		/**
713		* awaitUninterruptibly doesn't abort on interrupt
714		*/
715	<	public void testAwaitUninterruptibly() {
716	<	final ReentrantLock lock = new ReentrantLock();
715	>	public void testAwaitUninterruptibly() throws InterruptedException {
716	>	final ReentrantLock lock = new ReentrantLock();
717		final Condition c = lock.newCondition();
718	<	Thread t = new Thread(new Runnable() {
632	<	public void run() {
633	<	lock.lock();
634	<	c.awaitUninterruptibly();
635	<	lock.unlock();
636	<	}
637	<	});
718	>	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
719
720	+	thread.start();
721	+
722	+	while (!thread.lockStarted) {
723	+	delay(100);
724	+	}
725	+
726	+	lock.lock();
727		try {
728	<	t.start();
729	<	Thread.sleep(SHORT_DELAY_MS);
642	<	t.interrupt();
643	<	lock.lock();
728	>	thread.interrupt();
729	>	thread.canAwake = true;
730		c.signal();
731	+	} finally {
732		lock.unlock();
646	–	assert(t.isInterrupted());
647	–	t.join(SHORT_DELAY_MS);
648	–	assertFalse(t.isAlive());
649	–	}
650	–	catch (Exception ex) {
651	–	unexpectedException();
733		}
734	+
735	+	thread.join();
736	+	assertTrue(thread.interrupted);
737	+	assertFalse(thread.isAlive());
738		}
739
740		/**
741		* await is interruptible
742		*/
743	<	public void testAwait_Interrupt() {
744	<	final ReentrantLock lock = new ReentrantLock();
743	>	public void testAwait_Interrupt() throws InterruptedException {
744	>	final ReentrantLock lock = new ReentrantLock();
745		final Condition c = lock.newCondition();
746	<	Thread t = new Thread(new Runnable() {
747	<	public void run() {
748	<	try {
749	<	lock.lock();
750	<	c.await();
751	<	lock.unlock();
752	<	threadShouldThrow();
753	<	}
754	<	catch(InterruptedException success) {
755	<	}
671	<	}
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	<	}
746	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
747	>	public void realRun() throws InterruptedException {
748	>	lock.lock();
749	>	c.await();
750	>	}});
751	>
752	>	delay(SHORT_DELAY_MS);
753	>	t.interrupt();
754	>	t.join(SHORT_DELAY_MS);
755	>	assertFalse(t.isAlive());
756		}
757
758		/**
759		* awaitNanos is interruptible
760		*/
761	<	public void testAwaitNanos_Interrupt() {
762	<	final ReentrantLock lock = new ReentrantLock();
761	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
762	>	final ReentrantLock lock = new ReentrantLock();
763		final Condition c = lock.newCondition();
764	<	Thread t = new Thread(new Runnable() {
765	<	public void run() {
766	<	try {
767	<	lock.lock();
768	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
769	<	lock.unlock();
770	<	threadShouldThrow();
771	<	}
772	<	catch(InterruptedException success) {
773	<	}
702	<	}
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	<	}
764	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
765	>	public void realRun() throws InterruptedException {
766	>	lock.lock();
767	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
768	>	}});
769	>
770	>	delay(SHORT_DELAY_MS);
771	>	t.interrupt();
772	>	t.join(SHORT_DELAY_MS);
773	>	assertFalse(t.isAlive());
774		}
775
776		/**
777		* awaitUntil is interruptible
778		*/
779	<	public void testAwaitUntil_Interrupt() {
780	<	final ReentrantLock lock = new ReentrantLock();
779	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
780	>	final ReentrantLock lock = new ReentrantLock();
781		final Condition c = lock.newCondition();
782	<	Thread t = new Thread(new Runnable() {
783	<	public void run() {
784	<	try {
785	<	lock.lock();
786	<	java.util.Date d = new java.util.Date();
787	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
788	<	lock.unlock();
789	<	threadShouldThrow();
790	<	}
791	<	catch(InterruptedException success) {
792	<	}
734	<	}
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	<	}
782	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	lock.lock();
785	>	java.util.Date d = new java.util.Date();
786	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
787	>	}});
788	>
789	>	delay(SHORT_DELAY_MS);
790	>	t.interrupt();
791	>	t.join(SHORT_DELAY_MS);
792	>	assertFalse(t.isAlive());
793		}
794
795		/**
796		* signalAll wakes up all threads
797		*/
798	<	public void testSignalAll() {
799	<	final ReentrantLock lock = new ReentrantLock();
798	>	public void testSignalAll() throws InterruptedException {
799	>	final ReentrantLock lock = new ReentrantLock();
800		final Condition c = lock.newCondition();
801	<	Thread t1 = new Thread(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	lock.lock();
805	<	c.await();
806	<	lock.unlock();
807	<	}
808	<	catch(InterruptedException e) {
809	<	threadUnexpectedException();
810	<	}
811	<	}
812	<	});
813	<
814	<	Thread t2 = new Thread(new Runnable() {
815	<	public void run() {
816	<	try {
817	<	lock.lock();
818	<	c.await();
819	<	lock.unlock();
820	<	}
821	<	catch(InterruptedException e) {
822	<	threadUnexpectedException();
823	<	}
824	<	}
825	<	});
826	<
827	<	try {
828	<	t1.start();
829	<	t2.start();
830	<	Thread.sleep(SHORT_DELAY_MS);
831	<	lock.lock();
832	<	c.signalAll();
833	<	lock.unlock();
834	<	t1.join(SHORT_DELAY_MS);
835	<	t2.join(SHORT_DELAY_MS);
836	<	assertFalse(t1.isAlive());
837	<	assertFalse(t2.isAlive());
838	<	}
839	<	catch (Exception ex) {
840	<	unexpectedException();
841	<	}
801	>	Thread t1 = newStartedThread(new CheckedRunnable() {
802	>	public void realRun() throws InterruptedException {
803	>	lock.lock();
804	>	c.await();
805	>	lock.unlock();
806	>	}});
807	>
808	>	Thread t2 = newStartedThread(new CheckedRunnable() {
809	>	public void realRun() throws InterruptedException {
810	>	lock.lock();
811	>	c.await();
812	>	lock.unlock();
813	>	}});
814	>
815	>	delay(SHORT_DELAY_MS);
816	>	lock.lock();
817	>	c.signalAll();
818	>	lock.unlock();
819	>	t1.join(SHORT_DELAY_MS);
820	>	t2.join(SHORT_DELAY_MS);
821	>	assertFalse(t1.isAlive());
822	>	assertFalse(t2.isAlive());
823	>	}
824	>
825	>	/**
826	>	* await after multiple reentrant locking preserves lock count
827	>	*/
828	>	public void testAwaitLockCount() throws InterruptedException {
829	>	final ReentrantLock lock = new ReentrantLock();
830	>	final Condition c = lock.newCondition();
831	>	Thread t1 = newStartedThread(new CheckedRunnable() {
832	>	public void realRun() throws InterruptedException {
833	>	lock.lock();
834	>	assertEquals(1, lock.getHoldCount());
835	>	c.await();
836	>	assertEquals(1, lock.getHoldCount());
837	>	lock.unlock();
838	>	}});
839	>
840	>	Thread t2 = newStartedThread(new CheckedRunnable() {
841	>	public void realRun() throws InterruptedException {
842	>	lock.lock();
843	>	lock.lock();
844	>	assertEquals(2, lock.getHoldCount());
845	>	c.await();
846	>	assertEquals(2, lock.getHoldCount());
847	>	lock.unlock();
848	>	lock.unlock();
849	>	}});
850	>
851	>	delay(SHORT_DELAY_MS);
852	>	lock.lock();
853	>	c.signalAll();
854	>	lock.unlock();
855	>	t1.join(SHORT_DELAY_MS);
856	>	t2.join(SHORT_DELAY_MS);
857	>	assertFalse(t1.isAlive());
858	>	assertFalse(t2.isAlive());
859		}
860
861		/**
862		* A serialized lock deserializes as unlocked
863		*/
864	<	public void testSerialization() {
864	>	public void testSerialization() throws Exception {
865		ReentrantLock l = new ReentrantLock();
866		l.lock();
867		l.unlock();
868
869	<	try {
870	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
871	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
872	<	out.writeObject(l);
873	<	out.close();
874	<
875	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
876	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
877	<	ReentrantLock r = (ReentrantLock) in.readObject();
878	<	r.lock();
879	<	r.unlock();
880	<	} catch(Exception e){
881	<	e.printStackTrace();
882	<	unexpectedException();
883	<	}
869	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
870	>	ObjectOutputStream out =
871	>	new ObjectOutputStream(new BufferedOutputStream(bout));
872	>	out.writeObject(l);
873	>	out.close();
874	>
875	>	ByteArrayInputStream bin =
876	>	new ByteArrayInputStream(bout.toByteArray());
877	>	ObjectInputStream in =
878	>	new ObjectInputStream(new BufferedInputStream(bin));
879	>	ReentrantLock r = (ReentrantLock) in.readObject();
880	>	r.lock();
881	>	r.unlock();
882	>	}
883	>
884	>	/**
885	>	* toString indicates current lock state
886	>	*/
887	>	public void testToString() {
888	>	ReentrantLock lock = new ReentrantLock();
889	>	String us = lock.toString();
890	>	assertTrue(us.indexOf("Unlocked") >= 0);
891	>	lock.lock();
892	>	String ls = lock.toString();
893	>	assertTrue(ls.indexOf("Locked") >= 0);
894		}
895
896		}

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