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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 1.29 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.*;
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());
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	>	class InterruptibleLockRunnable extends CheckedRunnable {
27	>	final ReentrantLock lock;
28	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
29	>	public void realRun() throws InterruptedException {
30	>	lock.lockInterruptibly();
31	>	}
32	>	}
33	>
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 realRun() throws InterruptedException {
43	>	lock.lockInterruptibly();
44	>	}
45	>	}
46	>
47	>	/**
48	>	* Subclass to expose protected methods
49	>	*/
50	>	static class PublicReentrantLock extends ReentrantLock {
51	>	PublicReentrantLock() { super(); }
52	>	public Collection<Thread> getQueuedThreads() {
53	>	return super.getQueuedThreads();
54	>	}
55	>	public Collection<Thread> getWaitingThreads(Condition c) {
56	>	return super.getWaitingThreads(c);
57	>	}
58	>
59	>
60	>	}
61	>
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	<
32	<	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 sucess){}
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	+	/**
115	+	* hasQueuedThreads reports whether there are waiting threads
116	+	*/
117	+	public void testhasQueuedThreads() throws InterruptedException {
118	+	final ReentrantLock lock = new ReentrantLock();
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	<	* makes a lock, locks it, tries to aquire the lock in another thread
45	<	* interrupts that thread and waits for an interrupted Exception to
46	<	* be thrown.
138	>
139	>	/**
140	>	* getQueueLength reports number of waiting threads
141		*/
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	+	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	<	public void testInterruptedException(){
231	>	/**
232	>	* getQueuedThreads includes waiting threads
233	>	*/
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	>	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.
262	>	*/
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.lockInterruptibly();
270	<	fail("should throw");
271	<	}catch(InterruptedException sucess){}
272	<	}
273	<	});
274	<	t.start();
275	<	t.interrupt();
62	<	lock.unlock();
63	<	}
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	<	* tests for interrupted exception on a timed wait
67	<	*
277	>	/**
278	>	* TryLock on a locked lock fails
279		*/
280	<
280	>	public void testTryLockWhenLocked() throws InterruptedException {
281	>	final ReentrantLock lock = new ReentrantLock();
282	>	lock.lock();
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	<	public void testInterruptedException2(){
293	>	/**
294	>	* Timed tryLock on a locked lock times out
295	>	*/
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	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
303	<	fail("should throw");
304	<	}catch(InterruptedException sucess){}
305	<	}
306	<	});
82	<	t.start();
83	<	t.interrupt();
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	<
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		}
98	–
99	–
323
324
325	<	public void testIsLocked() {
325	>	/**
326	>	* isLocked is true when locked and false when not
327	>	*/
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(SHORT_DELAY_MS * 2);
339	<	}
340	<	catch(Exception e) {}
341	<	lock.unlock();
342	<	}
343	<	});
344	<	try{
345	<	t.start();
346	<	Thread.sleep(SHORT_DELAY_MS);
347	<	assertTrue(lock.isLocked());
348	<	t.join();
349	<	assertFalse(lock.isLocked());
350	<	} catch(Exception e){
351	<	fail("unexpected exception");
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 testLockInterruptibly2() throws InterruptedException {
368	>	final ReentrantLock lock = new ReentrantLock();
369	>	lock.lockInterruptibly();
370	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
371	>	t.start();
372	>	t.interrupt();
373	>	assertTrue(lock.isLocked());
374	>	assertTrue(lock.isHeldByCurrentThread());
375	>	t.join();
376	>	}
377	>
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	>	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();
395	>	final Condition c = lock.newCondition();
396	>	try {
397	>	c.signal();
398	>	shouldThrow();
399	>	} catch (IllegalMonitorStateException success) {}
400	>	}
401	>
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.hasWaiters(null);
466	>	shouldThrow();
467	>	} catch (NullPointerException success) {}
468	>	}
469	>
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	>	lock2.hasWaiters(c);
503	>	shouldThrow();
504	>	} catch (IllegalArgumentException success) {}
505	>	}
506	>
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.hasWaiters(c);
515	>	shouldThrow();
516	>	} catch (IllegalMonitorStateException success) {}
517	>	}
518	>
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	>	lock2.getWaitQueueLength(c);
529	>	shouldThrow();
530	>	} catch (IllegalArgumentException success) {}
531	>	}
532	>
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	>	lock2.getWaitingThreads(c);
555	>	shouldThrow();
556	>	} catch (IllegalArgumentException success) {}
557	>	}
558	>
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	>
571	>
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	+	lockStarted = true;
710	+
711	+	while (!canAwake) {
712	+	c.awaitUninterruptibly();
713	+	}
714	+
715	+	interrupted = isInterrupted();
716	+	lock.unlock();
717	+	}
718		}
719
720	<	/*
721	<	* current thread locks interruptibly the thread
722	<	* another thread tries to aquire the lock and blocks
723	<	* on the call. interrupt the attempted aquireLock
724	<	* assert that the first lock() call actually locked the lock
725	<	* assert that the current thread is the one holding the lock
726	<	*/
727	<
728	<	public void testLockedInterruptibly() {
729	<	final ReentrantLock lock = new ReentrantLock();
730	<	try {lock.lockInterruptibly();} catch(Exception e) {}
731	<	Thread t = new Thread(new Runnable() {
732	<	public void run() {
733	<	try {
734	<	lock.lockInterruptibly();
735	<	fail("Failed to generate an Interrupted Exception");
736	<	}
737	<	catch(InterruptedException e) {}
738	<	}
739	<	});
740	<	t.start();
741	<	t.interrupt();
742	<	assertTrue(lock.isLocked());
743	<	assertTrue(lock.isHeldByCurrentThread());
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	>	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	>	thread.interrupt();
737	>	thread.canAwake = true;
738	>	c.signal();
739	>	} finally {
740	>	lock.unlock();
741	>	}
742	>
743	>	thread.join();
744	>	assertTrue(thread.interrupted);
745	>	assertFalse(thread.isAlive());
746	>	}
747	>
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 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	>	/**
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 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	>	/**
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 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	>	/**
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 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	>	/**
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	>	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		}
155	–
910
911		}

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