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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.14 by dl, Sun Dec 28 22:44:59 2003 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 java.util.*;
13	+	import java.io.*;
14
15	<	public class ReentrantLockTest extends TestCase {
13	<	static int HOLD_COUNT_TEST_LIMIT = 20;
14	<
15	>	public class ReentrantLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17		junit.textui.TestRunner.run (suite());
18		}
18	–
19		public static Test suite() {
20		return new TestSuite(ReentrantLockTest.class);
21		}
22
23	<	private static long SHORT_DELAY_MS = 100;
24	<	private static long MEDIUM_DELAY_MS = 1000;
25	<	private static long LONG_DELAY_MS = 10000;
26	<
27	<	/*
28	<	* Unlocks an unlocked lock, throws Illegal Monitor State
29	<	*
23	>	/**
24	>	* A runnable calling lockInterruptibly
25		*/
26	<
27	<	public void testIllegalMonitorStateException(){
26	>	class InterruptibleLockRunnable implements Runnable {
27	>	final ReentrantLock lock;
28	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
29	>	public void run() {
30	>	try {
31	>	lock.lockInterruptibly();
32	>	} catch(InterruptedException success){}
33	>	}
34	>	}
35	>
36	>
37	>	/**
38	>	* A runnable calling lockInterruptibly that expects to be
39	>	* interrupted
40	>	*/
41	>	class InterruptedLockRunnable implements Runnable {
42	>	final ReentrantLock lock;
43	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
44	>	public void run() {
45	>	try {
46	>	lock.lockInterruptibly();
47	>	threadShouldThrow();
48	>	} catch(InterruptedException success){}
49	>	}
50	>	}
51	>
52	>	/**
53	>	* Subclass to expose protected methods
54	>	*/
55	>	static class PublicReentrantLock extends ReentrantLock {
56	>	PublicReentrantLock() { super(); }
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>
64	>
65	>	}
66	>
67	>	/**
68	>	* Constructor sets given fairness
69	>	*/
70	>	public void testConstructor() {
71		ReentrantLock rl = new ReentrantLock();
72	<	try{
73	<	rl.unlock();
74	<	fail("Should of thown Illegal Monitor State Exception");
72	>	assertFalse(rl.isFair());
73	>	ReentrantLock r2 = new ReentrantLock(true);
74	>	assertTrue(r2.isFair());
75	>	}
76
77	<	}catch(IllegalMonitorStateException sucess){}
77	>	/**
78	>	* locking an unlocked lock succeeds
79	>	*/
80	>	public void testLock() {
81	>	ReentrantLock rl = new ReentrantLock();
82	>	rl.lock();
83	>	assertTrue(rl.isLocked());
84	>	rl.unlock();
85	>	}
86
87	+	/**
88	+	* locking an unlocked fair lock succeeds
89	+	*/
90	+	public void testFairLock() {
91	+	ReentrantLock rl = new ReentrantLock(true);
92	+	rl.lock();
93	+	assertTrue(rl.isLocked());
94	+	rl.unlock();
95	+	}
96
97	+	/**
98	+	* Unlocking an unlocked lock throws IllegalMonitorStateException
99	+	*/
100	+	public void testUnlock_IllegalMonitorStateException() {
101	+	ReentrantLock rl = new ReentrantLock();
102	+	try {
103	+	rl.unlock();
104	+	shouldThrow();
105	+
106	+	} catch(IllegalMonitorStateException success){}
107		}
108	<
109	<	/*
110	<	* makes a lock, locks it, tries to aquire the lock in another thread
111	<	* interrupts that thread and waits for an interrupted Exception to
112	<	* be thrown.
108	>
109	>	/**
110	>	* trylock on an unlocked lock succeeds
111	>	*/
112	>	public void testTryLock() {
113	>	ReentrantLock rl = new ReentrantLock();
114	>	assertTrue(rl.tryLock());
115	>	assertTrue(rl.isLocked());
116	>	rl.unlock();
117	>	}
118	>
119	>
120	>	/**
121	>	* hasQueuedThreads reports whether there are waiting threads
122	>	*/
123	>	public void testhasQueuedThreads() {
124	>	final ReentrantLock lock = new ReentrantLock();
125	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
126	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
127	>	try {
128	>	assertFalse(lock.hasQueuedThreads());
129	>	lock.lock();
130	>	t1.start();
131	>	Thread.sleep(SHORT_DELAY_MS);
132	>	assertTrue(lock.hasQueuedThreads());
133	>	t2.start();
134	>	Thread.sleep(SHORT_DELAY_MS);
135	>	assertTrue(lock.hasQueuedThreads());
136	>	t1.interrupt();
137	>	Thread.sleep(SHORT_DELAY_MS);
138	>	assertTrue(lock.hasQueuedThreads());
139	>	lock.unlock();
140	>	Thread.sleep(SHORT_DELAY_MS);
141	>	assertFalse(lock.hasQueuedThreads());
142	>	t1.join();
143	>	t2.join();
144	>	} catch(Exception e){
145	>	unexpectedException();
146	>	}
147	>	}
148	>
149	>	/**
150	>	* getQueueLength reports number of waiting threads
151	>	*/
152	>	public void testGetQueueLength() {
153	>	final ReentrantLock lock = new ReentrantLock();
154	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
155	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
156	>	try {
157	>	assertEquals(0, lock.getQueueLength());
158	>	lock.lock();
159	>	t1.start();
160	>	Thread.sleep(SHORT_DELAY_MS);
161	>	assertEquals(1, lock.getQueueLength());
162	>	t2.start();
163	>	Thread.sleep(SHORT_DELAY_MS);
164	>	assertEquals(2, lock.getQueueLength());
165	>	t1.interrupt();
166	>	Thread.sleep(SHORT_DELAY_MS);
167	>	assertEquals(1, lock.getQueueLength());
168	>	lock.unlock();
169	>	Thread.sleep(SHORT_DELAY_MS);
170	>	assertEquals(0, lock.getQueueLength());
171	>	t1.join();
172	>	t2.join();
173	>	} catch(Exception e){
174	>	unexpectedException();
175	>	}
176	>	}
177	>
178	>	/**
179	>	* getQueuedThreads includes waiting threads
180		*/
181	+	public void testGetQueuedThreads() {
182	+	final PublicReentrantLock lock = new PublicReentrantLock();
183	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
184	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
185	+	try {
186	+	assertTrue(lock.getQueuedThreads().isEmpty());
187	+	lock.lock();
188	+	assertTrue(lock.getQueuedThreads().isEmpty());
189	+	t1.start();
190	+	Thread.sleep(SHORT_DELAY_MS);
191	+	assertTrue(lock.getQueuedThreads().contains(t1));
192	+	t2.start();
193	+	Thread.sleep(SHORT_DELAY_MS);
194	+	assertTrue(lock.getQueuedThreads().contains(t1));
195	+	assertTrue(lock.getQueuedThreads().contains(t2));
196	+	t1.interrupt();
197	+	Thread.sleep(SHORT_DELAY_MS);
198	+	assertFalse(lock.getQueuedThreads().contains(t1));
199	+	assertTrue(lock.getQueuedThreads().contains(t2));
200	+	lock.unlock();
201	+	Thread.sleep(SHORT_DELAY_MS);
202	+	assertTrue(lock.getQueuedThreads().isEmpty());
203	+	t1.join();
204	+	t2.join();
205	+	} catch(Exception e){
206	+	unexpectedException();
207	+	}
208	+	}
209	+
210
211	<	public void testInterruptedException(){
211	>	/**
212	>	* timed trylock is interruptible.
213	>	*/
214	>	public void testInterruptedException2() {
215		final ReentrantLock lock = new ReentrantLock();
216		lock.lock();
217		Thread t = new Thread(new Runnable() {
218	<	public void run(){
219	<	try{
220	<	lock.lockInterruptibly();
221	<	fail("should throw");
222	<	}catch(InterruptedException sucess){}
218	>	public void run() {
219	>	try {
220	>	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
221	>	threadShouldThrow();
222	>	} catch(InterruptedException success){}
223		}
224		});
225	<	t.start();
226	<	t.interrupt();
227	<	lock.unlock();
228	<	}
225	>	try {
226	>	t.start();
227	>	t.interrupt();
228	>	} catch(Exception e){
229	>	unexpectedException();
230	>	}
231	>	}
232
65	–	/*
66	–	* tests for interrupted exception on a timed wait
67	–	*
68	–	*/
69	–
233
234	<	public void testInterruptedException2(){
234	>	/**
235	>	* Trylock on a locked lock fails
236	>	*/
237	>	public void testTryLockWhenLocked() {
238		final ReentrantLock lock = new ReentrantLock();
239		lock.lock();
240		Thread t = new Thread(new Runnable() {
241	<	public void run(){
242	<	try{
77	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
78	<	fail("should throw");
79	<	}catch(InterruptedException sucess){}
241	>	public void run() {
242	>	threadAssertFalse(lock.tryLock());
243		}
244		});
245	<	t.start();
246	<	t.interrupt();
247	<	}
245	>	try {
246	>	t.start();
247	>	t.join();
248	>	lock.unlock();
249	>	} catch(Exception e){
250	>	unexpectedException();
251	>	}
252	>	}
253
254	+	/**
255	+	* Timed trylock on a locked lock times out
256	+	*/
257	+	public void testTryLock_Timeout() {
258	+	final ReentrantLock lock = new ReentrantLock();
259	+	lock.lock();
260	+	Thread t = new Thread(new Runnable() {
261	+	public void run() {
262	+	try {
263	+	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
264	+	} catch (Exception ex) {
265	+	threadUnexpectedException();
266	+	}
267	+	}
268	+	});
269	+	try {
270	+	t.start();
271	+	t.join();
272	+	lock.unlock();
273	+	} catch(Exception e){
274	+	unexpectedException();
275	+	}
276	+	}
277
278	+	/**
279	+	* getHoldCount returns number of recursive holds
280	+	*/
281		public void testGetHoldCount() {
282		ReentrantLock lock = new ReentrantLock();
283	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
283	>	for(int i = 1; i <= SIZE; i++) {
284		lock.lock();
285		assertEquals(i,lock.getHoldCount());
286		}
287	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
287	>	for(int i = SIZE; i > 0; i--) {
288		lock.unlock();
289		assertEquals(i-1,lock.getHoldCount());
290		}
291		}
292
293
294	<
295	<
294	>	/**
295	>	* isLocked is true when locked and false when not
296	>	*/
297		public void testIsLocked() {
298		final ReentrantLock lock = new ReentrantLock();
299		lock.lock();
#	Line 109 | Line 304 | public class ReentrantLockTest extends T
304		public void run() {
305		lock.lock();
306		try {
307	<	Thread.sleep(SHORT_DELAY_MS * 2);
307	>	Thread.sleep(SMALL_DELAY_MS);
308		}
309	<	catch(Exception e) {}
309	>	catch(Exception e) {
310	>	threadUnexpectedException();
311	>	}
312		lock.unlock();
313		}
314		});
315	<	try{
315	>	try {
316		t.start();
317		Thread.sleep(SHORT_DELAY_MS);
318		assertTrue(lock.isLocked());
319		t.join();
320		assertFalse(lock.isLocked());
321		} catch(Exception e){
322	<	fail("unexpected exception");
322	>	unexpectedException();
323	>	}
324	>	}
325	>
326	>
327	>	/**
328	>	* lockInterruptibly is interruptible.
329	>	*/
330	>	public void testLockInterruptibly1() {
331	>	final ReentrantLock lock = new ReentrantLock();
332	>	lock.lock();
333	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
334	>	try {
335	>	t.start();
336	>	t.interrupt();
337	>	lock.unlock();
338	>	t.join();
339	>	} catch(Exception e){
340	>	unexpectedException();
341	>	}
342	>	}
343	>
344	>	/**
345	>	* lockInterruptibly succeeds when unlocked, else is interruptible
346	>	*/
347	>	public void testLockInterruptibly2() {
348	>	final ReentrantLock lock = new ReentrantLock();
349	>	try {
350	>	lock.lockInterruptibly();
351	>	} catch(Exception e) {
352	>	unexpectedException();
353	>	}
354	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
355	>	try {
356	>	t.start();
357	>	t.interrupt();
358	>	assertTrue(lock.isLocked());
359	>	assertTrue(lock.isHeldByCurrentThread());
360	>	t.join();
361	>	} catch(Exception e){
362	>	unexpectedException();
363	>	}
364	>	}
365	>
366	>	/**
367	>	* Calling await without holding lock throws IllegalMonitorStateException
368	>	*/
369	>	public void testAwait_IllegalMonitor() {
370	>	final ReentrantLock lock = new ReentrantLock();
371	>	final Condition c = lock.newCondition();
372	>	try {
373	>	c.await();
374	>	shouldThrow();
375	>	}
376	>	catch (IllegalMonitorStateException success) {
377	>	}
378	>	catch (Exception ex) {
379	>	unexpectedException();
380	>	}
381	>	}
382	>
383	>	/**
384	>	* Calling signal without holding lock throws IllegalMonitorStateException
385	>	*/
386	>	public void testSignal_IllegalMonitor() {
387	>	final ReentrantLock lock = new ReentrantLock();
388	>	final Condition c = lock.newCondition();
389	>	try {
390	>	c.signal();
391	>	shouldThrow();
392		}
393	+	catch (IllegalMonitorStateException success) {
394	+	}
395	+	catch (Exception ex) {
396	+	unexpectedException();
397	+	}
398	+	}
399
400	+	/**
401	+	* awaitNanos without a signal times out
402	+	*/
403	+	public void testAwaitNanos_Timeout() {
404	+	final ReentrantLock lock = new ReentrantLock();
405	+	final Condition c = lock.newCondition();
406	+	try {
407	+	lock.lock();
408	+	long t = c.awaitNanos(100);
409	+	assertTrue(t <= 0);
410	+	lock.unlock();
411	+	}
412	+	catch (Exception ex) {
413	+	unexpectedException();
414	+	}
415	+	}
416	+
417	+	/**
418	+	*  timed await without a signal times out
419	+	*/
420	+	public void testAwait_Timeout() {
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));
426	+	lock.unlock();
427	+	}
428	+	catch (Exception ex) {
429	+	unexpectedException();
430	+	}
431		}
432
433	<	/*
434	<	* current thread locks interruptibly the thread
132	<	* another thread tries to aquire the lock and blocks
133	<	* on the call. interrupt the attempted aquireLock
134	<	* assert that the first lock() call actually locked the lock
135	<	* assert that the current thread is the one holding the lock
433	>	/**
434	>	* awaitUntil without a signal times out
435		*/
436	+	public void testAwaitUntil_Timeout() {
437	+	final ReentrantLock lock = new ReentrantLock();
438	+	final Condition c = lock.newCondition();
439	+	try {
440	+	lock.lock();
441	+	java.util.Date d = new java.util.Date();
442	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
443	+	lock.unlock();
444	+	}
445	+	catch (Exception ex) {
446	+	unexpectedException();
447	+	}
448	+	}
449
450	<	public void testLockedInterruptibly() {
450	>	/**
451	>	* await returns when signalled
452	>	*/
453	>	public void testAwait() {
454		final ReentrantLock lock = new ReentrantLock();
455	<	try {lock.lockInterruptibly();} catch(Exception e) {}
455	>	final Condition c = lock.newCondition();
456		Thread t = new Thread(new Runnable() {
457		public void run() {
458		try {
459	<	lock.lockInterruptibly();
460	<	fail("Failed to generate an Interrupted Exception");
459	>	lock.lock();
460	>	c.await();
461	>	lock.unlock();
462		}
463	<	catch(InterruptedException e) {}
463	>	catch(InterruptedException e) {
464	>	threadUnexpectedException();
465	>	}
466		}
467		});
468	<	t.start();
469	<	t.interrupt();
470	<	assertTrue(lock.isLocked());
471	<	assertTrue(lock.isHeldByCurrentThread());
468	>
469	>	try {
470	>	t.start();
471	>	Thread.sleep(SHORT_DELAY_MS);
472	>	lock.lock();
473	>	c.signal();
474	>	lock.unlock();
475	>	t.join(SHORT_DELAY_MS);
476	>	assertFalse(t.isAlive());
477	>	}
478	>	catch (Exception ex) {
479	>	unexpectedException();
480	>	}
481	>	}
482	>
483	>	/**
484	>	* hasWaiters throws NPE if null
485	>	*/
486	>	public void testHasWaitersNPE() {
487	>	final ReentrantLock lock = new ReentrantLock();
488	>	try {
489	>	lock.hasWaiters(null);
490	>	shouldThrow();
491	>	} catch (NullPointerException success) {
492	>	} catch (Exception ex) {
493	>	unexpectedException();
494	>	}
495	>	}
496	>
497	>	/**
498	>	* getWaitQueueLength throws NPE if null
499	>	*/
500	>	public void testGetWaitQueueLengthNPE() {
501	>	final ReentrantLock lock = new ReentrantLock();
502	>	try {
503	>	lock.getWaitQueueLength(null);
504	>	shouldThrow();
505	>	} catch (NullPointerException success) {
506	>	} catch (Exception ex) {
507	>	unexpectedException();
508	>	}
509	>	}
510	>
511	>
512	>	/**
513	>	* getWaitingThreads throws NPE if null
514	>	*/
515	>	public void testGetWaitingThreadsNPE() {
516	>	final PublicReentrantLock lock = new PublicReentrantLock();
517	>	try {
518	>	lock.getWaitingThreads(null);
519	>	shouldThrow();
520	>	} catch (NullPointerException success) {
521	>	} catch (Exception ex) {
522	>	unexpectedException();
523	>	}
524	>	}
525	>
526	>
527	>	/**
528	>	* hasWaiters throws IAE if not owned
529	>	*/
530	>	public void testHasWaitersIAE() {
531	>	final ReentrantLock lock = new ReentrantLock();
532	>	final Condition c = (lock.newCondition());
533	>	final ReentrantLock lock2 = new ReentrantLock();
534	>	try {
535	>	lock2.hasWaiters(c);
536	>	shouldThrow();
537	>	} catch (IllegalArgumentException success) {
538	>	} catch (Exception ex) {
539	>	unexpectedException();
540	>	}
541	>	}
542	>
543	>	/**
544	>	* hasWaiters throws IMSE if not locked
545	>	*/
546	>	public void testHasWaitersIMSE() {
547	>	final ReentrantLock lock = new ReentrantLock();
548	>	final Condition c = (lock.newCondition());
549	>	try {
550	>	lock.hasWaiters(c);
551	>	shouldThrow();
552	>	} catch (IllegalMonitorStateException success) {
553	>	} catch (Exception ex) {
554	>	unexpectedException();
555	>	}
556	>	}
557	>
558	>
559	>	/**
560	>	* getWaitQueueLength throws IAE if not owned
561	>	*/
562	>	public void testGetWaitQueueLengthIAE() {
563	>	final ReentrantLock lock = new ReentrantLock();
564	>	final Condition c = (lock.newCondition());
565	>	final ReentrantLock lock2 = new ReentrantLock();
566	>	try {
567	>	lock2.getWaitQueueLength(c);
568	>	shouldThrow();
569	>	} catch (IllegalArgumentException success) {
570	>	} catch (Exception ex) {
571	>	unexpectedException();
572	>	}
573	>	}
574	>
575	>	/**
576	>	* getWaitQueueLength throws IMSE if not locked
577	>	*/
578	>	public void testGetWaitQueueLengthIMSE() {
579	>	final ReentrantLock lock = new ReentrantLock();
580	>	final Condition c = (lock.newCondition());
581	>	try {
582	>	lock.getWaitQueueLength(c);
583	>	shouldThrow();
584	>	} catch (IllegalMonitorStateException success) {
585	>	} catch (Exception ex) {
586	>	unexpectedException();
587	>	}
588	>	}
589	>
590	>
591	>	/**
592	>	* getWaitingThreads throws IAE if not owned
593	>	*/
594	>	public void testGetWaitingThreadsIAE() {
595	>	final PublicReentrantLock lock = new PublicReentrantLock();
596	>	final Condition c = (lock.newCondition());
597	>	final PublicReentrantLock lock2 = new PublicReentrantLock();
598	>	try {
599	>	lock2.getWaitingThreads(c);
600	>	shouldThrow();
601	>	} catch (IllegalArgumentException success) {
602	>	} catch (Exception ex) {
603	>	unexpectedException();
604	>	}
605	>	}
606	>
607	>	/**
608	>	* getWaitingThreads throws IMSE if not locked
609	>	*/
610	>	public void testGetWaitingThreadsIMSE() {
611	>	final PublicReentrantLock lock = new PublicReentrantLock();
612	>	final Condition c = (lock.newCondition());
613	>	try {
614	>	lock.getWaitingThreads(c);
615	>	shouldThrow();
616	>	} catch (IllegalMonitorStateException success) {
617	>	} catch (Exception ex) {
618	>	unexpectedException();
619	>	}
620	>	}
621	>
622	>
623	>
624	>	/**
625	>	* hasWaiters returns true when a thread is waiting, else false
626	>	*/
627	>	public void testHasWaiters() {
628	>	final ReentrantLock lock = new ReentrantLock();
629	>	final Condition c = lock.newCondition();
630	>	Thread t = new Thread(new Runnable() {
631	>	public void run() {
632	>	try {
633	>	lock.lock();
634	>	threadAssertFalse(lock.hasWaiters(c));
635	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
636	>	c.await();
637	>	lock.unlock();
638	>	}
639	>	catch(InterruptedException e) {
640	>	threadUnexpectedException();
641	>	}
642	>	}
643	>	});
644	>
645	>	try {
646	>	t.start();
647	>	Thread.sleep(SHORT_DELAY_MS);
648	>	lock.lock();
649	>	assertTrue(lock.hasWaiters(c));
650	>	assertEquals(1, lock.getWaitQueueLength(c));
651	>	c.signal();
652	>	lock.unlock();
653	>	Thread.sleep(SHORT_DELAY_MS);
654	>	lock.lock();
655	>	assertFalse(lock.hasWaiters(c));
656	>	assertEquals(0, lock.getWaitQueueLength(c));
657	>	lock.unlock();
658	>	t.join(SHORT_DELAY_MS);
659	>	assertFalse(t.isAlive());
660	>	}
661	>	catch (Exception ex) {
662	>	unexpectedException();
663	>	}
664	>	}
665	>
666	>	/**
667	>	* getWaitQueueLength returns number of waiting threads
668	>	*/
669	>	public void testGetWaitQueueLength() {
670	>	final ReentrantLock lock = new ReentrantLock();
671	>	final Condition c = lock.newCondition();
672	>	Thread t1 = new Thread(new Runnable() {
673	>	public void run() {
674	>	try {
675	>	lock.lock();
676	>	threadAssertFalse(lock.hasWaiters(c));
677	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
678	>	c.await();
679	>	lock.unlock();
680	>	}
681	>	catch(InterruptedException e) {
682	>	threadUnexpectedException();
683	>	}
684	>	}
685	>	});
686	>
687	>	Thread t2 = new Thread(new Runnable() {
688	>	public void run() {
689	>	try {
690	>	lock.lock();
691	>	threadAssertTrue(lock.hasWaiters(c));
692	>	threadAssertEquals(1, lock.getWaitQueueLength(c));
693	>	c.await();
694	>	lock.unlock();
695	>	}
696	>	catch(InterruptedException e) {
697	>	threadUnexpectedException();
698	>	}
699	>	}
700	>	});
701	>
702	>	try {
703	>	t1.start();
704	>	Thread.sleep(SHORT_DELAY_MS);
705	>	t2.start();
706	>	Thread.sleep(SHORT_DELAY_MS);
707	>	lock.lock();
708	>	assertTrue(lock.hasWaiters(c));
709	>	assertEquals(2, lock.getWaitQueueLength(c));
710	>	c.signalAll();
711	>	lock.unlock();
712	>	Thread.sleep(SHORT_DELAY_MS);
713	>	lock.lock();
714	>	assertFalse(lock.hasWaiters(c));
715	>	assertEquals(0, lock.getWaitQueueLength(c));
716	>	lock.unlock();
717	>	t1.join(SHORT_DELAY_MS);
718	>	t2.join(SHORT_DELAY_MS);
719	>	assertFalse(t1.isAlive());
720	>	assertFalse(t2.isAlive());
721	>	}
722	>	catch (Exception ex) {
723	>	unexpectedException();
724	>	}
725	>	}
726	>
727	>	/**
728	>	* getWaitingThreads returns only and all waiting threads
729	>	*/
730	>	public void testGetWaitingThreads() {
731	>	final PublicReentrantLock lock = new PublicReentrantLock();
732	>	final Condition c = lock.newCondition();
733	>	Thread t1 = new Thread(new Runnable() {
734	>	public void run() {
735	>	try {
736	>	lock.lock();
737	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
738	>	c.await();
739	>	lock.unlock();
740	>	}
741	>	catch(InterruptedException e) {
742	>	threadUnexpectedException();
743	>	}
744	>	}
745	>	});
746	>
747	>	Thread t2 = new Thread(new Runnable() {
748	>	public void run() {
749	>	try {
750	>	lock.lock();
751	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
752	>	c.await();
753	>	lock.unlock();
754	>	}
755	>	catch(InterruptedException e) {
756	>	threadUnexpectedException();
757	>	}
758	>	}
759	>	});
760	>
761	>	try {
762	>	lock.lock();
763	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
764	>	lock.unlock();
765	>	t1.start();
766	>	Thread.sleep(SHORT_DELAY_MS);
767	>	t2.start();
768	>	Thread.sleep(SHORT_DELAY_MS);
769	>	lock.lock();
770	>	assertTrue(lock.hasWaiters(c));
771	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
772	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
773	>	c.signalAll();
774	>	lock.unlock();
775	>	Thread.sleep(SHORT_DELAY_MS);
776	>	lock.lock();
777	>	assertFalse(lock.hasWaiters(c));
778	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
779	>	lock.unlock();
780	>	t1.join(SHORT_DELAY_MS);
781	>	t2.join(SHORT_DELAY_MS);
782	>	assertFalse(t1.isAlive());
783	>	assertFalse(t2.isAlive());
784	>	}
785	>	catch (Exception ex) {
786	>	unexpectedException();
787	>	}
788	>	}
789	>
790	>
791	>
792	>	/**
793	>	* awaitUninterruptibly doesn't abort on interrupt
794	>	*/
795	>	public void testAwaitUninterruptibly() {
796	>	final ReentrantLock lock = new ReentrantLock();
797	>	final Condition c = lock.newCondition();
798	>	Thread t = new Thread(new Runnable() {
799	>	public void run() {
800	>	lock.lock();
801	>	c.awaitUninterruptibly();
802	>	lock.unlock();
803	>	}
804	>	});
805	>
806	>	try {
807	>	t.start();
808	>	Thread.sleep(SHORT_DELAY_MS);
809	>	t.interrupt();
810	>	lock.lock();
811	>	c.signal();
812	>	lock.unlock();
813	>	assert(t.isInterrupted());
814	>	t.join(SHORT_DELAY_MS);
815	>	assertFalse(t.isAlive());
816	>	}
817	>	catch (Exception ex) {
818	>	unexpectedException();
819	>	}
820	>	}
821	>
822	>	/**
823	>	* await is interruptible
824	>	*/
825	>	public void testAwait_Interrupt() {
826	>	final ReentrantLock lock = new ReentrantLock();
827	>	final Condition c = lock.newCondition();
828	>	Thread t = new Thread(new Runnable() {
829	>	public void run() {
830	>	try {
831	>	lock.lock();
832	>	c.await();
833	>	lock.unlock();
834	>	threadShouldThrow();
835	>	}
836	>	catch(InterruptedException success) {
837	>	}
838	>	}
839	>	});
840	>
841	>	try {
842	>	t.start();
843	>	Thread.sleep(SHORT_DELAY_MS);
844	>	t.interrupt();
845	>	t.join(SHORT_DELAY_MS);
846	>	assertFalse(t.isAlive());
847	>	}
848	>	catch (Exception ex) {
849	>	unexpectedException();
850	>	}
851	>	}
852	>
853	>	/**
854	>	* awaitNanos is interruptible
855	>	*/
856	>	public void testAwaitNanos_Interrupt() {
857	>	final ReentrantLock lock = new ReentrantLock();
858	>	final Condition c = lock.newCondition();
859	>	Thread t = new Thread(new Runnable() {
860	>	public void run() {
861	>	try {
862	>	lock.lock();
863	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
864	>	lock.unlock();
865	>	threadShouldThrow();
866	>	}
867	>	catch(InterruptedException success) {
868	>	}
869	>	}
870	>	});
871	>
872	>	try {
873	>	t.start();
874	>	Thread.sleep(SHORT_DELAY_MS);
875	>	t.interrupt();
876	>	t.join(SHORT_DELAY_MS);
877	>	assertFalse(t.isAlive());
878	>	}
879	>	catch (Exception ex) {
880	>	unexpectedException();
881	>	}
882	>	}
883	>
884	>	/**
885	>	* awaitUntil is interruptible
886	>	*/
887	>	public void testAwaitUntil_Interrupt() {
888	>	final ReentrantLock lock = new ReentrantLock();
889	>	final Condition c = lock.newCondition();
890	>	Thread t = new Thread(new Runnable() {
891	>	public void run() {
892	>	try {
893	>	lock.lock();
894	>	java.util.Date d = new java.util.Date();
895	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
896	>	lock.unlock();
897	>	threadShouldThrow();
898	>	}
899	>	catch(InterruptedException success) {
900	>	}
901	>	}
902	>	});
903	>
904	>	try {
905	>	t.start();
906	>	Thread.sleep(SHORT_DELAY_MS);
907	>	t.interrupt();
908	>	t.join(SHORT_DELAY_MS);
909	>	assertFalse(t.isAlive());
910	>	}
911	>	catch (Exception ex) {
912	>	unexpectedException();
913	>	}
914	>	}
915	>
916	>	/**
917	>	* signalAll wakes up all threads
918	>	*/
919	>	public void testSignalAll() {
920	>	final ReentrantLock lock = new ReentrantLock();
921	>	final Condition c = lock.newCondition();
922	>	Thread t1 = new Thread(new Runnable() {
923	>	public void run() {
924	>	try {
925	>	lock.lock();
926	>	c.await();
927	>	lock.unlock();
928	>	}
929	>	catch(InterruptedException e) {
930	>	threadUnexpectedException();
931	>	}
932	>	}
933	>	});
934	>
935	>	Thread t2 = new Thread(new Runnable() {
936	>	public void run() {
937	>	try {
938	>	lock.lock();
939	>	c.await();
940	>	lock.unlock();
941	>	}
942	>	catch(InterruptedException e) {
943	>	threadUnexpectedException();
944	>	}
945	>	}
946	>	});
947	>
948	>	try {
949	>	t1.start();
950	>	t2.start();
951	>	Thread.sleep(SHORT_DELAY_MS);
952	>	lock.lock();
953	>	c.signalAll();
954	>	lock.unlock();
955	>	t1.join(SHORT_DELAY_MS);
956	>	t2.join(SHORT_DELAY_MS);
957	>	assertFalse(t1.isAlive());
958	>	assertFalse(t2.isAlive());
959	>	}
960	>	catch (Exception ex) {
961	>	unexpectedException();
962	>	}
963	>	}
964	>
965	>	/**
966	>	* A serialized lock deserializes as unlocked
967	>	*/
968	>	public void testSerialization() {
969	>	ReentrantLock l = new ReentrantLock();
970	>	l.lock();
971	>	l.unlock();
972	>
973	>	try {
974	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
975	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
976	>	out.writeObject(l);
977	>	out.close();
978	>
979	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
980	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
981	>	ReentrantLock r = (ReentrantLock) in.readObject();
982	>	r.lock();
983	>	r.unlock();
984	>	} catch(Exception e){
985	>	e.printStackTrace();
986	>	unexpectedException();
987	>	}
988		}
155	–
989
990		}

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