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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.29 by jsr166, Tue Nov 17 13:31:53 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.*;
#	Line 13 | Line 14 | import java.io.*;
14
15		public class ReentrantLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
20		return new TestSuite(ReentrantLockTest.class);
21		}
22
23	<	static int HOLD_COUNT_TEST_LIMIT = 20;
24	<
25	<	class InterruptibleLockRunnable implements Runnable {
23	>	/**
24	>	* A runnable calling lockInterruptibly
25	>	*/
26	>	class InterruptibleLockRunnable extends CheckedRunnable {
27		final ReentrantLock lock;
28		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
29	<	public void run(){
30	<	try{
29	<	lock.lockInterruptibly();
30	<	} catch(InterruptedException success){}
29	>	public void realRun() throws InterruptedException {
30	>	lock.lockInterruptibly();
31		}
32		}
33
34	<	// Same, except must interrupt
35	<	class InterruptedLockRunnable implements Runnable {
34	>
35	>	/**
36	>	* A runnable calling lockInterruptibly that expects to be
37	>	* interrupted
38	>	*/
39	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40		final ReentrantLock lock;
41		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
42	<	public void run(){
43	<	try{
40	<	lock.lockInterruptibly();
41	<	threadFail("should throw");
42	<	} catch(InterruptedException success){}
42	>	public void realRun() throws InterruptedException {
43	>	lock.lockInterruptibly();
44		}
45		}
46
47		/**
48	<	* To expose protected methods
48	>	* Subclass to expose protected methods
49		*/
50	<	static class MyReentrantLock extends ReentrantLock {
51	<	MyReentrantLock() { super(); }
52	<	public Collection<Thread> getQueuedThreads() {
53	<	return super.getQueuedThreads();
50	>	static class PublicReentrantLock extends ReentrantLock {
51	>	PublicReentrantLock() { super(); }
52	>	public Collection<Thread> getQueuedThreads() {
53	>	return super.getQueuedThreads();
54		}
55	<	public ConditionObject newCondition() {
56	<	return new MyCondition(this);
55	>	public Collection<Thread> getWaitingThreads(Condition c) {
56	>	return super.getWaitingThreads(c);
57		}
58
58	–	static class MyCondition extends ReentrantLock.ConditionObject {
59	–	MyCondition(MyReentrantLock l) { super(l); }
60	–	public Collection<Thread> getWaitingThreads() {
61	–	return super.getWaitingThreads();
62	–	}
63	–	}
59
60		}
61
62	<	/*
62	>	/**
63	>	* Constructor sets given fairness
64	>	*/
65	>	public void testConstructor() {
66	>	assertFalse(new ReentrantLock().isFair());
67	>	assertFalse(new ReentrantLock(false).isFair());
68	>	assertTrue(new ReentrantLock(true).isFair());
69	>	}
70	>
71	>	/**
72	>	* locking an unlocked lock succeeds
73	>	*/
74	>	public void testLock() {
75	>	ReentrantLock rl = new ReentrantLock();
76	>	rl.lock();
77	>	assertTrue(rl.isLocked());
78	>	rl.unlock();
79	>	assertFalse(rl.isLocked());
80	>	}
81	>
82	>	/**
83	>	* locking an unlocked fair lock succeeds
84	>	*/
85	>	public void testFairLock() {
86	>	ReentrantLock rl = new ReentrantLock(true);
87	>	rl.lock();
88	>	assertTrue(rl.isLocked());
89	>	rl.unlock();
90	>	}
91	>
92	>	/**
93		* Unlocking an unlocked lock throws IllegalMonitorStateException
94		*/
95	<	public void testIllegalMonitorStateException(){
95	>	public void testUnlock_IllegalMonitorStateException() {
96		ReentrantLock rl = new ReentrantLock();
97	<	try{
97	>	try {
98		rl.unlock();
99	<	fail("Should of thown Illegal Monitor State Exception");
99	>	shouldThrow();
100	>	} catch (IllegalMonitorStateException success) {}
101	>	}
102
103	<	} catch(IllegalMonitorStateException success){}
103	>	/**
104	>	* tryLock on an unlocked lock succeeds
105	>	*/
106	>	public void testTryLock() {
107	>	ReentrantLock rl = new ReentrantLock();
108	>	assertTrue(rl.tryLock());
109	>	assertTrue(rl.isLocked());
110	>	rl.unlock();
111		}
112
113	<	/*
114	<	* lockInterruptibly is interruptible.
113	>
114	>	/**
115	>	* hasQueuedThreads reports whether there are waiting threads
116		*/
117	<	public void testInterruptedException(){
117	>	public void testhasQueuedThreads() throws InterruptedException {
118		final ReentrantLock lock = new ReentrantLock();
119	<	lock.lock();
120	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
121	<	try {
122	<	t.start();
123	<	t.interrupt();
124	<	lock.unlock();
125	<	t.join();
126	<	} catch(Exception e){
127	<	fail("unexpected exception");
128	<	}
129	<	}
119	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
120	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
121	>	assertFalse(lock.hasQueuedThreads());
122	>	lock.lock();
123	>	t1.start();
124	>	Thread.sleep(SHORT_DELAY_MS);
125	>	assertTrue(lock.hasQueuedThreads());
126	>	t2.start();
127	>	Thread.sleep(SHORT_DELAY_MS);
128	>	assertTrue(lock.hasQueuedThreads());
129	>	t1.interrupt();
130	>	Thread.sleep(SHORT_DELAY_MS);
131	>	assertTrue(lock.hasQueuedThreads());
132	>	lock.unlock();
133	>	Thread.sleep(SHORT_DELAY_MS);
134	>	assertFalse(lock.hasQueuedThreads());
135	>	t1.join();
136	>	t2.join();
137	>	}
138
139	<	/*
140	<	* getLockQueueLength reports number of waiting threads
139	>	/**
140	>	* getQueueLength reports number of waiting threads
141		*/
142	<	public void testgetLockQueueLength(){
142	>	public void testGetQueueLength() throws InterruptedException {
143		final ReentrantLock lock = new ReentrantLock();
144		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
145		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
146	+	assertEquals(0, lock.getQueueLength());
147	+	lock.lock();
148	+	t1.start();
149	+	Thread.sleep(SHORT_DELAY_MS);
150	+	assertEquals(1, lock.getQueueLength());
151	+	t2.start();
152	+	Thread.sleep(SHORT_DELAY_MS);
153	+	assertEquals(2, lock.getQueueLength());
154	+	t1.interrupt();
155	+	Thread.sleep(SHORT_DELAY_MS);
156	+	assertEquals(1, lock.getQueueLength());
157	+	lock.unlock();
158	+	Thread.sleep(SHORT_DELAY_MS);
159	+	assertEquals(0, lock.getQueueLength());
160	+	t1.join();
161	+	t2.join();
162	+	}
163	+
164	+	/**
165	+	* getQueueLength reports number of waiting threads
166	+	*/
167	+	public void testGetQueueLength_fair() throws InterruptedException {
168	+	final ReentrantLock lock = new ReentrantLock(true);
169	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
170	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
171	+	assertEquals(0, lock.getQueueLength());
172	+	lock.lock();
173	+	t1.start();
174	+	Thread.sleep(SHORT_DELAY_MS);
175	+	assertEquals(1, lock.getQueueLength());
176	+	t2.start();
177	+	Thread.sleep(SHORT_DELAY_MS);
178	+	assertEquals(2, lock.getQueueLength());
179	+	t1.interrupt();
180	+	Thread.sleep(SHORT_DELAY_MS);
181	+	assertEquals(1, lock.getQueueLength());
182	+	lock.unlock();
183	+	Thread.sleep(SHORT_DELAY_MS);
184	+	assertEquals(0, lock.getQueueLength());
185	+	t1.join();
186	+	t2.join();
187	+	}
188	+
189	+	/**
190	+	* hasQueuedThread(null) throws NPE
191	+	*/
192	+	public void testHasQueuedThreadNPE() {
193	+	final ReentrantLock sync = new ReentrantLock();
194		try {
195	<	assertEquals(0, lock.getLockQueueLength());
196	<	lock.lock();
197	<	t1.start();
198	<	Thread.sleep(SHORT_DELAY_MS);
199	<	assertEquals(1, lock.getLockQueueLength());
200	<	t2.start();
201	<	Thread.sleep(SHORT_DELAY_MS);
202	<	assertEquals(2, lock.getLockQueueLength());
203	<	t1.interrupt();
204	<	Thread.sleep(SHORT_DELAY_MS);
205	<	assertEquals(1, lock.getLockQueueLength());
206	<	lock.unlock();
207	<	Thread.sleep(SHORT_DELAY_MS);
208	<	assertEquals(0, lock.getLockQueueLength());
209	<	t1.join();
210	<	t2.join();
211	<	} catch(Exception e){
212	<	fail("unexpected exception");
213	<	}
214	<	}
195	>	sync.hasQueuedThread(null);
196	>	shouldThrow();
197	>	} catch (NullPointerException success) {}
198	>	}
199	>
200	>	/**
201	>	* hasQueuedThread reports whether a thread is queued.
202	>	*/
203	>	public void testHasQueuedThread() throws InterruptedException {
204	>	final ReentrantLock sync = new ReentrantLock();
205	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
206	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
207	>	assertFalse(sync.hasQueuedThread(t1));
208	>	assertFalse(sync.hasQueuedThread(t2));
209	>	sync.lock();
210	>	t1.start();
211	>	Thread.sleep(SHORT_DELAY_MS);
212	>	assertTrue(sync.hasQueuedThread(t1));
213	>	t2.start();
214	>	Thread.sleep(SHORT_DELAY_MS);
215	>	assertTrue(sync.hasQueuedThread(t1));
216	>	assertTrue(sync.hasQueuedThread(t2));
217	>	t1.interrupt();
218	>	Thread.sleep(SHORT_DELAY_MS);
219	>	assertFalse(sync.hasQueuedThread(t1));
220	>	assertTrue(sync.hasQueuedThread(t2));
221	>	sync.unlock();
222	>	Thread.sleep(SHORT_DELAY_MS);
223	>	assertFalse(sync.hasQueuedThread(t1));
224	>	Thread.sleep(SHORT_DELAY_MS);
225	>	assertFalse(sync.hasQueuedThread(t2));
226	>	t1.join();
227	>	t2.join();
228	>	}
229	>
230
231	<	/*
231	>	/**
232		* getQueuedThreads includes waiting threads
233		*/
234	<	public void testGetQueuedThreads(){
235	<	final MyReentrantLock lock = new MyReentrantLock();
234	>	public void testGetQueuedThreads() throws InterruptedException {
235	>	final PublicReentrantLock lock = new PublicReentrantLock();
236		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
237		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
238	<	try {
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();
152	<	} catch(Exception e){
153	<	fail("unexpected exception");
154	<	}
155	<	}
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();
257	>	}
258
259
260	<	/*
261	<	* timed trylock is interruptible.
260	>	/**
261	>	* timed tryLock is interruptible.
262		*/
263	<	public void testInterruptedException2(){
263	>	public void testInterruptedException2() throws InterruptedException {
264		final ReentrantLock lock = new ReentrantLock();
265		lock.lock();
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run(){
268	<	try{
269	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
270	<	threadFail("should throw");
271	<	} catch(InterruptedException success){}
272	<	}
273	<	});
172	<	try {
173	<	t.start();
174	<	t.interrupt();
175	<	} catch(Exception e){
176	<	fail("unexpected exception");
177	<	}
266	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
267	>	public void realRun() throws InterruptedException {
268	>	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
269	>	}});
270	>
271	>	t.start();
272	>	t.interrupt();
273	>	t.join();
274		}
275
276
277		/**
278	<	* Trylock on a locked lock fails
278	>	* TryLock on a locked lock fails
279		*/
280	<	public void testTryLockWhenLocked() {
280	>	public void testTryLockWhenLocked() throws InterruptedException {
281		final ReentrantLock lock = new ReentrantLock();
282		lock.lock();
283	<	Thread t = new Thread(new Runnable() {
284	<	public void run(){
285	<	threadAssertFalse(lock.tryLock());
286	<	}
287	<	});
288	<	try {
289	<	t.start();
290	<	t.join();
291	<	lock.unlock();
196	<	} catch(Exception e){
197	<	fail("unexpected exception");
198	<	}
199	<	}
283	>	Thread t = new Thread(new CheckedRunnable() {
284	>	public void realRun() {
285	>	threadAssertFalse(lock.tryLock());
286	>	}});
287	>
288	>	t.start();
289	>	t.join();
290	>	lock.unlock();
291	>	}
292
293		/**
294	<	* Timed Trylock on a locked lock times out
294	>	* Timed tryLock on a locked lock times out
295		*/
296	<	public void testTryLock_Timeout(){
296	>	public void testTryLock_Timeout() throws InterruptedException {
297		final ReentrantLock lock = new ReentrantLock();
298		lock.lock();
299	<	Thread t = new Thread(new Runnable() {
300	<	public void run(){
301	<	try {
302	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
303	<	} catch (Exception ex) {
304	<	threadFail("unexpected exception");
305	<	}
306	<	}
307	<	});
308	<	try {
217	<	t.start();
218	<	t.join();
219	<	lock.unlock();
220	<	} catch(Exception e){
221	<	fail("unexpected exception");
222	<	}
223	<	}
224	<
299	>	Thread t = new Thread(new CheckedRunnable() {
300	>	public void realRun() throws InterruptedException {
301	>	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
302	>	}});
303	>
304	>	t.start();
305	>	t.join();
306	>	lock.unlock();
307	>	}
308	>
309		/**
310		* getHoldCount returns number of recursive holds
311		*/
312		public void testGetHoldCount() {
313		ReentrantLock lock = new ReentrantLock();
314	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
314	>	for (int i = 1; i <= SIZE; i++) {
315		lock.lock();
316	<	assertEquals(i,lock.getHoldCount());
316	>	assertEquals(i, lock.getHoldCount());
317		}
318	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
318	>	for (int i = SIZE; i > 0; i--) {
319		lock.unlock();
320	<	assertEquals(i-1,lock.getHoldCount());
320	>	assertEquals(i-1, lock.getHoldCount());
321		}
322		}
323	<
324	<
323	>
324	>
325		/**
326		* isLocked is true when locked and false when not
327		*/
328	<	public void testIsLocked() {
328	>	public void testIsLocked() throws InterruptedException {
329		final ReentrantLock lock = new ReentrantLock();
330		lock.lock();
331		assertTrue(lock.isLocked());
332		lock.unlock();
333		assertFalse(lock.isLocked());
334	<	Thread t = new Thread(new Runnable() {
335	<	public void run() {
336	<	lock.lock();
337	<	try {
338	<	Thread.sleep(SMALL_DELAY_MS);
339	<	}
340	<	catch(Exception e) {
341	<	threadFail("unexpected exception");
342	<	}
343	<	lock.unlock();
344	<	}
345	<	});
262	<	try{
263	<	t.start();
264	<	Thread.sleep(SHORT_DELAY_MS);
265	<	assertTrue(lock.isLocked());
266	<	t.join();
267	<	assertFalse(lock.isLocked());
268	<	} catch(Exception e){
269	<	fail("unexpected exception");
270	<	}
334	>	Thread t = new Thread(new CheckedRunnable() {
335	>	public void realRun() throws InterruptedException {
336	>	lock.lock();
337	>	Thread.sleep(SMALL_DELAY_MS);
338	>	lock.unlock();
339	>	}});
340	>
341	>	t.start();
342	>	Thread.sleep(SHORT_DELAY_MS);
343	>	assertTrue(lock.isLocked());
344	>	t.join();
345	>	assertFalse(lock.isLocked());
346		}
347
348
349		/**
350	+	* lockInterruptibly is interruptible.
351	+	*/
352	+	public void testLockInterruptibly1() throws InterruptedException {
353	+	final ReentrantLock lock = new ReentrantLock();
354	+	lock.lock();
355	+	Thread t = new Thread(new InterruptedLockRunnable(lock));
356	+	t.start();
357	+	Thread.sleep(SHORT_DELAY_MS);
358	+	t.interrupt();
359	+	Thread.sleep(SHORT_DELAY_MS);
360	+	lock.unlock();
361	+	t.join();
362	+	}
363	+
364	+	/**
365		* lockInterruptibly succeeds when unlocked, else is interruptible
366		*/
367	<	public void testLockInterruptibly() {
368	<	final ReentrantLock lock = new ReentrantLock();
369	<	try {
280	<	lock.lockInterruptibly();
281	<	} catch(Exception e) {
282	<	fail("unexpected exception");
283	<	}
367	>	public void testLockInterruptibly2() throws InterruptedException {
368	>	final ReentrantLock lock = new ReentrantLock();
369	>	lock.lockInterruptibly();
370		Thread t = new Thread(new InterruptedLockRunnable(lock));
371	<	try {
372	<	t.start();
373	<	t.interrupt();
374	<	assertTrue(lock.isLocked());
375	<	assertTrue(lock.isHeldByCurrentThread());
290	<	t.join();
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
293	<	}
371	>	t.start();
372	>	t.interrupt();
373	>	assertTrue(lock.isLocked());
374	>	assertTrue(lock.isHeldByCurrentThread());
375	>	t.join();
376		}
377
378	<	public void testAwait_IllegalMonitor() {
379	<	final ReentrantLock lock = new ReentrantLock();
378	>	/**
379	>	* Calling await without holding lock throws IllegalMonitorStateException
380	>	*/
381	>	public void testAwait_IllegalMonitor() throws InterruptedException {
382	>	final ReentrantLock lock = new ReentrantLock();
383		final Condition c = lock.newCondition();
384		try {
385		c.await();
386	<	fail("should throw");
387	<	}
303	<	catch (IllegalMonitorStateException success) {
304	<	}
305	<	catch (Exception ex) {
306	<	fail("should throw IMSE");
307	<	}
386	>	shouldThrow();
387	>	} catch (IllegalMonitorStateException success) {}
388		}
389
390	+	/**
391	+	* Calling signal without holding lock throws IllegalMonitorStateException
392	+	*/
393		public void testSignal_IllegalMonitor() {
394	<	final ReentrantLock lock = new ReentrantLock();
394	>	final ReentrantLock lock = new ReentrantLock();
395		final Condition c = lock.newCondition();
396		try {
397		c.signal();
398	<	fail("should throw");
399	<	}
317	<	catch (IllegalMonitorStateException success) {
318	<	}
319	<	catch (Exception ex) {
320	<	fail("should throw IMSE");
321	<	}
398	>	shouldThrow();
399	>	} catch (IllegalMonitorStateException success) {}
400		}
401
402	<	public void testAwaitNanos_Timeout() {
403	<	final ReentrantLock lock = new ReentrantLock();
402	>	/**
403	>	* awaitNanos without a signal times out
404	>	*/
405	>	public void testAwaitNanos_Timeout() throws InterruptedException {
406	>	final ReentrantLock lock = new ReentrantLock();
407		final Condition c = lock.newCondition();
408	+	lock.lock();
409	+	long t = c.awaitNanos(100);
410	+	assertTrue(t <= 0);
411	+	lock.unlock();
412	+	}
413	+
414	+	/**
415	+	*  timed await without a signal times out
416	+	*/
417	+	public void testAwait_Timeout() throws InterruptedException {
418	+	final ReentrantLock lock = new ReentrantLock();
419	+	final Condition c = lock.newCondition();
420	+	lock.lock();
421	+	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
422	+	lock.unlock();
423	+	}
424	+
425	+	/**
426	+	* awaitUntil without a signal times out
427	+	*/
428	+	public void testAwaitUntil_Timeout() throws InterruptedException {
429	+	final ReentrantLock lock = new ReentrantLock();
430	+	final Condition c = lock.newCondition();
431	+	lock.lock();
432	+	java.util.Date d = new java.util.Date();
433	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
434	+	lock.unlock();
435	+	}
436	+
437	+	/**
438	+	* await returns when signalled
439	+	*/
440	+	public void testAwait() throws InterruptedException {
441	+	final ReentrantLock lock = new ReentrantLock();
442	+	final Condition c = lock.newCondition();
443	+	Thread t = new Thread(new CheckedRunnable() {
444	+	public void realRun() throws InterruptedException {
445	+	lock.lock();
446	+	c.await();
447	+	lock.unlock();
448	+	}});
449	+
450	+	t.start();
451	+	Thread.sleep(SHORT_DELAY_MS);
452	+	lock.lock();
453	+	c.signal();
454	+	lock.unlock();
455	+	t.join(SHORT_DELAY_MS);
456	+	assertFalse(t.isAlive());
457	+	}
458	+
459	+	/**
460	+	* hasWaiters throws NPE if null
461	+	*/
462	+	public void testHasWaitersNPE() {
463	+	final ReentrantLock lock = new ReentrantLock();
464		try {
465	<	lock.lock();
466	<	long t = c.awaitNanos(100);
467	<	assertTrue(t <= 0);
331	<	lock.unlock();
332	<	}
333	<	catch (Exception ex) {
334	<	fail("unexpected exception");
335	<	}
465	>	lock.hasWaiters(null);
466	>	shouldThrow();
467	>	} catch (NullPointerException success) {}
468		}
469
470	<	public void testAwait_Timeout() {
471	<	final ReentrantLock lock = new ReentrantLock();
470	>	/**
471	>	* getWaitQueueLength throws NPE if null
472	>	*/
473	>	public void testGetWaitQueueLengthNPE() {
474	>	final ReentrantLock lock = new ReentrantLock();
475	>	try {
476	>	lock.getWaitQueueLength(null);
477	>	shouldThrow();
478	>	} catch (NullPointerException success) {}
479	>	}
480	>
481	>
482	>	/**
483	>	* getWaitingThreads throws NPE if null
484	>	*/
485	>	public void testGetWaitingThreadsNPE() {
486	>	final PublicReentrantLock lock = new PublicReentrantLock();
487	>	try {
488	>	lock.getWaitingThreads(null);
489	>	shouldThrow();
490	>	} catch (NullPointerException success) {}
491	>	}
492	>
493	>
494	>	/**
495	>	* hasWaiters throws IAE if not owned
496	>	*/
497	>	public void testHasWaitersIAE() {
498	>	final ReentrantLock lock = new ReentrantLock();
499		final Condition c = lock.newCondition();
500	+	final ReentrantLock lock2 = new ReentrantLock();
501		try {
502	<	lock.lock();
503	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
504	<	lock.unlock();
345	<	}
346	<	catch (Exception ex) {
347	<	fail("unexpected exception");
348	<	}
502	>	lock2.hasWaiters(c);
503	>	shouldThrow();
504	>	} catch (IllegalArgumentException success) {}
505		}
506
507	<	public void testAwaitUntil_Timeout() {
508	<	final ReentrantLock lock = new ReentrantLock();
507	>	/**
508	>	* hasWaiters throws IMSE if not locked
509	>	*/
510	>	public void testHasWaitersIMSE() {
511	>	final ReentrantLock lock = new ReentrantLock();
512		final Condition c = lock.newCondition();
513		try {
514	<	lock.lock();
515	<	java.util.Date d = new java.util.Date();
516	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
358	<	lock.unlock();
359	<	}
360	<	catch (Exception ex) {
361	<	fail("unexpected exception");
362	<	}
514	>	lock.hasWaiters(c);
515	>	shouldThrow();
516	>	} catch (IllegalMonitorStateException success) {}
517		}
518
365	–	public void testAwait() {
366	–	final ReentrantLock lock = new ReentrantLock();
367	–	final ReentrantLock.ConditionObject c = lock.newCondition();
368	–	Thread t = new Thread(new Runnable() {
369	–	public void run() {
370	–	try {
371	–	lock.lock();
372	–	c.await();
373	–	lock.unlock();
374	–	}
375	–	catch(InterruptedException e) {
376	–	threadFail("unexpected exception");
377	–	}
378	–	}
379	–	});
519
520	+	/**
521	+	* getWaitQueueLength throws IAE if not owned
522	+	*/
523	+	public void testGetWaitQueueLengthIAE() {
524	+	final ReentrantLock lock = new ReentrantLock();
525	+	final Condition c = lock.newCondition();
526	+	final ReentrantLock lock2 = new ReentrantLock();
527		try {
528	<	t.start();
529	<	Thread.sleep(SHORT_DELAY_MS);
530	<	lock.lock();
385	<	c.signal();
386	<	lock.unlock();
387	<	t.join(SHORT_DELAY_MS);
388	<	assertFalse(t.isAlive());
389	<	}
390	<	catch (Exception ex) {
391	<	fail("unexpected exception");
392	<	}
528	>	lock2.getWaitQueueLength(c);
529	>	shouldThrow();
530	>	} catch (IllegalArgumentException success) {}
531		}
532
533	<	public void testHasWaiters() {
534	<	final ReentrantLock lock = new ReentrantLock();
535	<	final ReentrantLock.ConditionObject c = lock.newCondition();
536	<	Thread t = new Thread(new Runnable() {
537	<	public void run() {
538	<	try {
539	<	lock.lock();
540	<	threadAssertFalse(c.hasWaiters());
541	<	threadAssertEquals(0, c.getWaitQueueLength());
542	<	c.await();
543	<	lock.unlock();
406	<	}
407	<	catch(InterruptedException e) {
408	<	threadFail("unexpected exception");
409	<	}
410	<	}
411	<	});
533	>	/**
534	>	* getWaitQueueLength throws IMSE if not locked
535	>	*/
536	>	public void testGetWaitQueueLengthIMSE() {
537	>	final ReentrantLock lock = new ReentrantLock();
538	>	final Condition c = lock.newCondition();
539	>	try {
540	>	lock.getWaitQueueLength(c);
541	>	shouldThrow();
542	>	} catch (IllegalMonitorStateException success) {}
543	>	}
544
545	+
546	+	/**
547	+	* getWaitingThreads throws IAE if not owned
548	+	*/
549	+	public void testGetWaitingThreadsIAE() {
550	+	final PublicReentrantLock lock = new PublicReentrantLock();
551	+	final Condition c = lock.newCondition();
552	+	final PublicReentrantLock lock2 = new PublicReentrantLock();
553		try {
554	<	t.start();
555	<	Thread.sleep(SHORT_DELAY_MS);
556	<	lock.lock();
417	<	assertTrue(c.hasWaiters());
418	<	assertEquals(1, c.getWaitQueueLength());
419	<	c.signal();
420	<	lock.unlock();
421	<	Thread.sleep(SHORT_DELAY_MS);
422	<	lock.lock();
423	<	assertFalse(c.hasWaiters());
424	<	assertEquals(0, c.getWaitQueueLength());
425	<	lock.unlock();
426	<	t.join(SHORT_DELAY_MS);
427	<	assertFalse(t.isAlive());
428	<	}
429	<	catch (Exception ex) {
430	<	fail("unexpected exception");
431	<	}
554	>	lock2.getWaitingThreads(c);
555	>	shouldThrow();
556	>	} catch (IllegalArgumentException success) {}
557		}
558
559	<	public void testGetWaitQueueLength() {
560	<	final ReentrantLock lock = new ReentrantLock();
561	<	final ReentrantLock.ConditionObject c = lock.newCondition();
562	<	Thread t1 = new Thread(new Runnable() {
563	<	public void run() {
564	<	try {
565	<	lock.lock();
566	<	threadAssertFalse(c.hasWaiters());
567	<	threadAssertEquals(0, c.getWaitQueueLength());
568	<	c.await();
444	<	lock.unlock();
445	<	}
446	<	catch(InterruptedException e) {
447	<	threadFail("unexpected exception");
448	<	}
449	<	}
450	<	});
451	<
452	<	Thread t2 = new Thread(new Runnable() {
453	<	public void run() {
454	<	try {
455	<	lock.lock();
456	<	threadAssertTrue(c.hasWaiters());
457	<	threadAssertEquals(1, c.getWaitQueueLength());
458	<	c.await();
459	<	lock.unlock();
460	<	}
461	<	catch(InterruptedException e) {
462	<	threadFail("unexpected exception");
463	<	}
464	<	}
465	<	});
466	<
467	<	try {
468	<	t1.start();
469	<	Thread.sleep(SHORT_DELAY_MS);
470	<	t2.start();
471	<	Thread.sleep(SHORT_DELAY_MS);
472	<	lock.lock();
473	<	assertTrue(c.hasWaiters());
474	<	assertEquals(2, c.getWaitQueueLength());
475	<	c.signalAll();
476	<	lock.unlock();
477	<	Thread.sleep(SHORT_DELAY_MS);
478	<	lock.lock();
479	<	assertFalse(c.hasWaiters());
480	<	assertEquals(0, c.getWaitQueueLength());
481	<	lock.unlock();
482	<	t1.join(SHORT_DELAY_MS);
483	<	t2.join(SHORT_DELAY_MS);
484	<	assertFalse(t1.isAlive());
485	<	assertFalse(t2.isAlive());
486	<	}
487	<	catch (Exception ex) {
488	<	fail("unexpected exception");
489	<	}
559	>	/**
560	>	* getWaitingThreads throws IMSE if not locked
561	>	*/
562	>	public void testGetWaitingThreadsIMSE() {
563	>	final PublicReentrantLock lock = new PublicReentrantLock();
564	>	final Condition c = lock.newCondition();
565	>	try {
566	>	lock.getWaitingThreads(c);
567	>	shouldThrow();
568	>	} catch (IllegalMonitorStateException success) {}
569		}
570
492	–	public void testGetWaitingThreads() {
493	–	final MyReentrantLock lock = new MyReentrantLock();
494	–	final MyReentrantLock.MyCondition c = (MyReentrantLock.MyCondition)lock.newCondition();
495	–	Thread t1 = new Thread(new Runnable() {
496	–	public void run() {
497	–	try {
498	–	lock.lock();
499	–	threadAssertTrue(c.getWaitingThreads().isEmpty());
500	–	c.await();
501	–	lock.unlock();
502	–	}
503	–	catch(InterruptedException e) {
504	–	threadFail("unexpected exception");
505	–	}
506	–	}
507	–	});
508	–
509	–	Thread t2 = new Thread(new Runnable() {
510	–	public void run() {
511	–	try {
512	–	lock.lock();
513	–	threadAssertFalse(c.getWaitingThreads().isEmpty());
514	–	c.await();
515	–	lock.unlock();
516	–	}
517	–	catch(InterruptedException e) {
518	–	threadFail("unexpected exception");
519	–	}
520	–	}
521	–	});
571
572	<	try {
573	<	lock.lock();
574	<	assertTrue(c.getWaitingThreads().isEmpty());
575	<	lock.unlock();
576	<	t1.start();
577	<	Thread.sleep(SHORT_DELAY_MS);
578	<	t2.start();
579	<	Thread.sleep(SHORT_DELAY_MS);
580	<	lock.lock();
581	<	assertTrue(c.hasWaiters());
582	<	assertTrue(c.getWaitingThreads().contains(t1));
583	<	assertTrue(c.getWaitingThreads().contains(t2));
584	<	c.signalAll();
585	<	lock.unlock();
586	<	Thread.sleep(SHORT_DELAY_MS);
572	>	/**
573	>	* hasWaiters returns true when a thread is waiting, else false
574	>	*/
575	>	public void testHasWaiters() throws InterruptedException {
576	>	final ReentrantLock lock = new ReentrantLock();
577	>	final Condition c = lock.newCondition();
578	>	Thread t = new Thread(new CheckedRunnable() {
579	>	public void realRun() throws InterruptedException {
580	>	lock.lock();
581	>	threadAssertFalse(lock.hasWaiters(c));
582	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
583	>	c.await();
584	>	lock.unlock();
585	>	}});
586	>
587	>	t.start();
588	>	Thread.sleep(SHORT_DELAY_MS);
589	>	lock.lock();
590	>	assertTrue(lock.hasWaiters(c));
591	>	assertEquals(1, lock.getWaitQueueLength(c));
592	>	c.signal();
593	>	lock.unlock();
594	>	Thread.sleep(SHORT_DELAY_MS);
595	>	lock.lock();
596	>	assertFalse(lock.hasWaiters(c));
597	>	assertEquals(0, lock.getWaitQueueLength(c));
598	>	lock.unlock();
599	>	t.join(SHORT_DELAY_MS);
600	>	assertFalse(t.isAlive());
601	>	}
602	>
603	>	/**
604	>	* getWaitQueueLength returns number of waiting threads
605	>	*/
606	>	public void testGetWaitQueueLength() throws InterruptedException {
607	>	final ReentrantLock lock = new ReentrantLock();
608	>	final Condition c = lock.newCondition();
609	>	Thread t1 = new Thread(new CheckedRunnable() {
610	>	public void realRun() throws InterruptedException {
611	>	lock.lock();
612	>	threadAssertFalse(lock.hasWaiters(c));
613	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
614	>	c.await();
615	>	lock.unlock();
616	>	}});
617	>
618	>	Thread t2 = new Thread(new CheckedRunnable() {
619	>	public void realRun() throws InterruptedException {
620	>	lock.lock();
621	>	threadAssertTrue(lock.hasWaiters(c));
622	>	threadAssertEquals(1, lock.getWaitQueueLength(c));
623	>	c.await();
624	>	lock.unlock();
625	>	}});
626	>
627	>	t1.start();
628	>	Thread.sleep(SHORT_DELAY_MS);
629	>	t2.start();
630	>	Thread.sleep(SHORT_DELAY_MS);
631	>	lock.lock();
632	>	assertTrue(lock.hasWaiters(c));
633	>	assertEquals(2, lock.getWaitQueueLength(c));
634	>	c.signalAll();
635	>	lock.unlock();
636	>	Thread.sleep(SHORT_DELAY_MS);
637	>	lock.lock();
638	>	assertFalse(lock.hasWaiters(c));
639	>	assertEquals(0, lock.getWaitQueueLength(c));
640	>	lock.unlock();
641	>	t1.join(SHORT_DELAY_MS);
642	>	t2.join(SHORT_DELAY_MS);
643	>	assertFalse(t1.isAlive());
644	>	assertFalse(t2.isAlive());
645	>	}
646	>
647	>	/**
648	>	* getWaitingThreads returns only and all waiting threads
649	>	*/
650	>	public void testGetWaitingThreads() throws InterruptedException {
651	>	final PublicReentrantLock lock = new PublicReentrantLock();
652	>	final Condition c = lock.newCondition();
653	>	Thread t1 = new Thread(new CheckedRunnable() {
654	>	public void realRun() throws InterruptedException {
655	>	lock.lock();
656	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
657	>	c.await();
658	>	lock.unlock();
659	>	}});
660	>
661	>	Thread t2 = new Thread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	lock.lock();
664	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
665	>	c.await();
666	>	lock.unlock();
667	>	}});
668	>
669	>	lock.lock();
670	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
671	>	lock.unlock();
672	>	t1.start();
673	>	Thread.sleep(SHORT_DELAY_MS);
674	>	t2.start();
675	>	Thread.sleep(SHORT_DELAY_MS);
676	>	lock.lock();
677	>	assertTrue(lock.hasWaiters(c));
678	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
679	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
680	>	c.signalAll();
681	>	lock.unlock();
682	>	Thread.sleep(SHORT_DELAY_MS);
683	>	lock.lock();
684	>	assertFalse(lock.hasWaiters(c));
685	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
686	>	lock.unlock();
687	>	t1.join(SHORT_DELAY_MS);
688	>	t2.join(SHORT_DELAY_MS);
689	>	assertFalse(t1.isAlive());
690	>	assertFalse(t2.isAlive());
691	>	}
692	>
693	>	/** A helper class for uninterruptible wait tests */
694	>	class UninterruptibleThread extends Thread {
695	>	private ReentrantLock lock;
696	>	private Condition c;
697	>
698	>	public volatile boolean canAwake = false;
699	>	public volatile boolean interrupted = false;
700	>	public volatile boolean lockStarted = false;
701	>
702	>	public UninterruptibleThread(ReentrantLock lock, Condition c) {
703	>	this.lock = lock;
704	>	this.c = c;
705	>	}
706	>
707	>	public synchronized void run() {
708		lock.lock();
709	<	assertFalse(c.hasWaiters());
710	<	assertTrue(c.getWaitingThreads().isEmpty());
709	>	lockStarted = true;
710	>
711	>	while (!canAwake) {
712	>	c.awaitUninterruptibly();
713	>	}
714	>
715	>	interrupted = isInterrupted();
716		lock.unlock();
542	–	t1.join(SHORT_DELAY_MS);
543	–	t2.join(SHORT_DELAY_MS);
544	–	assertFalse(t1.isAlive());
545	–	assertFalse(t2.isAlive());
546	–	}
547	–	catch (Exception ex) {
548	–	fail("unexpected exception");
717		}
718		}
719
720	<	public void testAwaitUninterruptibly() {
721	<	final ReentrantLock lock = new ReentrantLock();
720	>	/**
721	>	* awaitUninterruptibly doesn't abort on interrupt
722	>	*/
723	>	public void testAwaitUninterruptibly() throws InterruptedException {
724	>	final ReentrantLock lock = new ReentrantLock();
725		final Condition c = lock.newCondition();
726	<	Thread t = new Thread(new Runnable() {
727	<	public void run() {
728	<	lock.lock();
558	<	c.awaitUninterruptibly();
559	<	lock.unlock();
560	<	}
561	<	});
726	>	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
727	>
728	>	thread.start();
729
730	+	while (!thread.lockStarted) {
731	+	Thread.sleep(100);
732	+	}
733	+
734	+	lock.lock();
735		try {
736	<	t.start();
737	<	Thread.sleep(SHORT_DELAY_MS);
566	<	t.interrupt();
567	<	lock.lock();
736	>	thread.interrupt();
737	>	thread.canAwake = true;
738		c.signal();
739	+	} finally {
740		lock.unlock();
570	–	t.join(SHORT_DELAY_MS);
571	–	assertFalse(t.isAlive());
572	–	}
573	–	catch (Exception ex) {
574	–	fail("unexpected exception");
741		}
742	+
743	+	thread.join();
744	+	assertTrue(thread.interrupted);
745	+	assertFalse(thread.isAlive());
746		}
747
748	<	public void testAwait_Interrupt() {
749	<	final ReentrantLock lock = new ReentrantLock();
748	>	/**
749	>	* await is interruptible
750	>	*/
751	>	public void testAwait_Interrupt() throws InterruptedException {
752	>	final ReentrantLock lock = new ReentrantLock();
753		final Condition c = lock.newCondition();
754	<	Thread t = new Thread(new Runnable() {
755	<	public void run() {
756	<	try {
757	<	lock.lock();
758	<	c.await();
759	<	lock.unlock();
760	<	threadFail("should throw");
761	<	}
762	<	catch(InterruptedException success) {
763	<	}
764	<	}
592	<	});
593	<
594	<	try {
595	<	t.start();
596	<	Thread.sleep(SHORT_DELAY_MS);
597	<	t.interrupt();
598	<	t.join(SHORT_DELAY_MS);
599	<	assertFalse(t.isAlive());
600	<	}
601	<	catch (Exception ex) {
602	<	fail("unexpected exception");
603	<	}
754	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
755	>	public void realRun() throws InterruptedException {
756	>	lock.lock();
757	>	c.await();
758	>	}});
759	>
760	>	t.start();
761	>	Thread.sleep(SHORT_DELAY_MS);
762	>	t.interrupt();
763	>	t.join(SHORT_DELAY_MS);
764	>	assertFalse(t.isAlive());
765		}
766
767	<	public void testAwaitNanos_Interrupt() {
768	<	final ReentrantLock lock = new ReentrantLock();
767	>	/**
768	>	* awaitNanos is interruptible
769	>	*/
770	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
771	>	final ReentrantLock lock = new ReentrantLock();
772		final Condition c = lock.newCondition();
773	<	Thread t = new Thread(new Runnable() {
774	<	public void run() {
775	<	try {
776	<	lock.lock();
777	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
778	<	lock.unlock();
779	<	threadFail("should throw");
780	<	}
781	<	catch(InterruptedException success) {
782	<	}
783	<	}
620	<	});
621	<
622	<	try {
623	<	t.start();
624	<	Thread.sleep(SHORT_DELAY_MS);
625	<	t.interrupt();
626	<	t.join(SHORT_DELAY_MS);
627	<	assertFalse(t.isAlive());
628	<	}
629	<	catch (Exception ex) {
630	<	fail("unexpected exception");
631	<	}
773	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	lock.lock();
776	>	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
777	>	}});
778	>
779	>	t.start();
780	>	Thread.sleep(SHORT_DELAY_MS);
781	>	t.interrupt();
782	>	t.join(SHORT_DELAY_MS);
783	>	assertFalse(t.isAlive());
784		}
785
786	<	public void testAwaitUntil_Interrupt() {
787	<	final ReentrantLock lock = new ReentrantLock();
786	>	/**
787	>	* awaitUntil is interruptible
788	>	*/
789	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
790	>	final ReentrantLock lock = new ReentrantLock();
791		final Condition c = lock.newCondition();
792	<	Thread t = new Thread(new Runnable() {
793	<	public void run() {
794	<	try {
795	<	lock.lock();
796	<	java.util.Date d = new java.util.Date();
797	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
798	<	lock.unlock();
799	<	threadFail("should throw");
800	<	}
801	<	catch(InterruptedException success) {
802	<	}
803	<	}
649	<	});
650	<
651	<	try {
652	<	t.start();
653	<	Thread.sleep(SHORT_DELAY_MS);
654	<	t.interrupt();
655	<	t.join(SHORT_DELAY_MS);
656	<	assertFalse(t.isAlive());
657	<	}
658	<	catch (Exception ex) {
659	<	fail("unexpected exception");
660	<	}
792	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
793	>	public void realRun() throws InterruptedException {
794	>	lock.lock();
795	>	java.util.Date d = new java.util.Date();
796	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
797	>	}});
798	>
799	>	t.start();
800	>	Thread.sleep(SHORT_DELAY_MS);
801	>	t.interrupt();
802	>	t.join(SHORT_DELAY_MS);
803	>	assertFalse(t.isAlive());
804		}
805
806	<	public void testSignalAll() {
807	<	final ReentrantLock lock = new ReentrantLock();
806	>	/**
807	>	* signalAll wakes up all threads
808	>	*/
809	>	public void testSignalAll() throws InterruptedException {
810	>	final ReentrantLock lock = new ReentrantLock();
811		final Condition c = lock.newCondition();
812	<	Thread t1 = new Thread(new Runnable() {
813	<	public void run() {
814	<	try {
815	<	lock.lock();
816	<	c.await();
817	<	lock.unlock();
818	<	}
819	<	catch(InterruptedException e) {
820	<	threadFail("unexpected exception");
821	<	}
822	<	}
823	<	});
824	<
825	<	Thread t2 = new Thread(new Runnable() {
826	<	public void run() {
827	<	try {
828	<	lock.lock();
829	<	c.await();
830	<	lock.unlock();
831	<	}
832	<	catch(InterruptedException e) {
833	<	threadFail("unexpected exception");
834	<	}
835	<	}
836	<	});
837	<
838	<	try {
839	<	t1.start();
840	<	t2.start();
841	<	Thread.sleep(SHORT_DELAY_MS);
842	<	lock.lock();
843	<	c.signalAll();
844	<	lock.unlock();
845	<	t1.join(SHORT_DELAY_MS);
846	<	t2.join(SHORT_DELAY_MS);
847	<	assertFalse(t1.isAlive());
848	<	assertFalse(t2.isAlive());
849	<	}
850	<	catch (Exception ex) {
851	<	fail("unexpected exception");
852	<	}
812	>	Thread t1 = new Thread(new CheckedRunnable() {
813	>	public void realRun() throws InterruptedException {
814	>	lock.lock();
815	>	c.await();
816	>	lock.unlock();
817	>	}});
818	>
819	>	Thread t2 = new Thread(new CheckedRunnable() {
820	>	public void realRun() throws InterruptedException {
821	>	lock.lock();
822	>	c.await();
823	>	lock.unlock();
824	>	}});
825	>
826	>	t1.start();
827	>	t2.start();
828	>	Thread.sleep(SHORT_DELAY_MS);
829	>	lock.lock();
830	>	c.signalAll();
831	>	lock.unlock();
832	>	t1.join(SHORT_DELAY_MS);
833	>	t2.join(SHORT_DELAY_MS);
834	>	assertFalse(t1.isAlive());
835	>	assertFalse(t2.isAlive());
836	>	}
837	>
838	>	/**
839	>	* await after multiple reentrant locking preserves lock count
840	>	*/
841	>	public void testAwaitLockCount() throws InterruptedException {
842	>	final ReentrantLock lock = new ReentrantLock();
843	>	final Condition c = lock.newCondition();
844	>	Thread t1 = new Thread(new CheckedRunnable() {
845	>	public void realRun() throws InterruptedException {
846	>	lock.lock();
847	>	threadAssertEquals(1, lock.getHoldCount());
848	>	c.await();
849	>	threadAssertEquals(1, lock.getHoldCount());
850	>	lock.unlock();
851	>	}});
852	>
853	>	Thread t2 = new Thread(new CheckedRunnable() {
854	>	public void realRun() throws InterruptedException {
855	>	lock.lock();
856	>	lock.lock();
857	>	threadAssertEquals(2, lock.getHoldCount());
858	>	c.await();
859	>	threadAssertEquals(2, lock.getHoldCount());
860	>	lock.unlock();
861	>	lock.unlock();
862	>	}});
863	>
864	>	t1.start();
865	>	t2.start();
866	>	Thread.sleep(SHORT_DELAY_MS);
867	>	lock.lock();
868	>	c.signalAll();
869	>	lock.unlock();
870	>	t1.join(SHORT_DELAY_MS);
871	>	t2.join(SHORT_DELAY_MS);
872	>	assertFalse(t1.isAlive());
873	>	assertFalse(t2.isAlive());
874		}
875
876	<	public void testSerialization() {
876	>	/**
877	>	* A serialized lock deserializes as unlocked
878	>	*/
879	>	public void testSerialization() throws Exception {
880		ReentrantLock l = new ReentrantLock();
881		l.lock();
882		l.unlock();
883
884	<	try {
885	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
886	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
887	<	out.writeObject(l);
888	<	out.close();
889	<
890	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
891	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
892	<	ReentrantLock r = (ReentrantLock) in.readObject();
893	<	r.lock();
894	<	r.unlock();
895	<	} catch(Exception e){
896	<	e.printStackTrace();
897	<	fail("unexpected exception");
898	<	}
884	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
885	>	ObjectOutputStream out =
886	>	new ObjectOutputStream(new BufferedOutputStream(bout));
887	>	out.writeObject(l);
888	>	out.close();
889	>
890	>	ByteArrayInputStream bin =
891	>	new ByteArrayInputStream(bout.toByteArray());
892	>	ObjectInputStream in =
893	>	new ObjectInputStream(new BufferedInputStream(bin));
894	>	ReentrantLock r = (ReentrantLock) in.readObject();
895	>	r.lock();
896	>	r.unlock();
897	>	}
898	>
899	>	/**
900	>	* toString indicates current lock state
901	>	*/
902	>	public void testToString() {
903	>	ReentrantLock lock = new ReentrantLock();
904	>	String us = lock.toString();
905	>	assertTrue(us.indexOf("Unlocked") >= 0);
906	>	lock.lock();
907	>	String ls = lock.toString();
908	>	assertTrue(ls.indexOf("Locked") >= 0);
909		}
910
911		}

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