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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 1.32 by jsr166, Mon Nov 30 08:31:09 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	+	import java.util.*;
14	+	import java.io.*;
15
16	<	public class ReentrantLockTest extends TestCase {
13	<	static int HOLD_COUNT_TEST_LIMIT = 20;
14	<
16	>	public class ReentrantLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run (suite());
19		}
18	–
20		public static Test suite() {
21	<	return new TestSuite(ReentrantLockTest.class);
21	>	return new TestSuite(ReentrantLockTest.class);
22	>	}
23	>
24	>	/**
25	>	* A runnable calling lockInterruptibly
26	>	*/
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28	>	final ReentrantLock lock;
29	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
30	>	public void realRun() throws InterruptedException {
31	>	lock.lockInterruptibly();
32	>	}
33	>	}
34	>
35	>
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39	>	*/
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	>	final ReentrantLock lock;
42	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45	>	}
46	>	}
47	>
48	>	/**
49	>	* Subclass to expose protected methods
50	>	*/
51	>	static class PublicReentrantLock extends ReentrantLock {
52	>	PublicReentrantLock() { super(); }
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55	>	}
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58	>	}
59	>
60	>
61		}
62
63	<	private static long SHORT_DELAY_MS = 100;
64	<	private static long MEDIUM_DELAY_MS = 1000;
65	<	private static long LONG_DELAY_MS = 10000;
66	<
67	<	/*
68	<	* Unlocks an unlocked lock, throws Illegal Monitor State
69	<	*
70	<	*/
71	<
72	<	public void testIllegalMonitorStateException(){
73	<	ReentrantLock rl = new ReentrantLock();
74	<	try{
75	<	rl.unlock();
76	<	fail("Should of thown Illegal Monitor State Exception");
77	<
78	<	}catch(IllegalMonitorStateException sucess){}
79	<
80	<
81	<	}
82	<
83	<	/*
84	<	* makes a lock, locks it, tries to aquire the lock in another thread
85	<	* interrupts that thread and waits for an interrupted Exception to
86	<	* be thrown.
87	<	*/
88	<
89	<	public void testInterruptedException(){
90	<	final ReentrantLock lock = new ReentrantLock();
91	<	lock.lock();
92	<	Thread t = new Thread(new Runnable() {
93	<	public void run(){
94	<	try{
95	<	lock.lockInterruptibly();
96	<	fail("should throw");
97	<	}catch(InterruptedException sucess){}
98	<	}
99	<	});
100	<	t.start();
101	<	t.interrupt();
102	<	lock.unlock();
103	<	}
104	<
105	<	/*
106	<	* tests for interrupted exception on a timed wait
107	<	*
108	<	*/
109	<
110	<
111	<	public void testInterruptedException2(){
112	<	final ReentrantLock lock = new ReentrantLock();
113	<	lock.lock();
114	<	Thread t = new Thread(new Runnable() {
115	<	public void run(){
116	<	try{
117	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
118	<	fail("should throw");
119	<	}catch(InterruptedException sucess){}
120	<	}
121	<	});
122	<	t.start();
123	<	t.interrupt();
63	>	/**
64	>	* Constructor sets given fairness
65	>	*/
66	>	public void testConstructor() {
67	>	assertFalse(new ReentrantLock().isFair());
68	>	assertFalse(new ReentrantLock(false).isFair());
69	>	assertTrue(new ReentrantLock(true).isFair());
70	>	}
71	>
72	>	/**
73	>	* locking an unlocked lock succeeds
74	>	*/
75	>	public void testLock() {
76	>	ReentrantLock rl = new ReentrantLock();
77	>	rl.lock();
78	>	assertTrue(rl.isLocked());
79	>	rl.unlock();
80	>	assertFalse(rl.isLocked());
81	>	}
82	>
83	>	/**
84	>	* locking an unlocked fair lock succeeds
85	>	*/
86	>	public void testFairLock() {
87	>	ReentrantLock rl = new ReentrantLock(true);
88	>	rl.lock();
89	>	assertTrue(rl.isLocked());
90	>	rl.unlock();
91	>	}
92	>
93	>	/**
94	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
95	>	*/
96	>	public void testUnlock_IllegalMonitorStateException() {
97	>	ReentrantLock rl = new ReentrantLock();
98	>	try {
99	>	rl.unlock();
100	>	shouldThrow();
101	>	} catch (IllegalMonitorStateException success) {}
102	>	}
103	>
104	>	/**
105	>	* tryLock on an unlocked lock succeeds
106	>	*/
107	>	public void testTryLock() {
108	>	ReentrantLock rl = new ReentrantLock();
109	>	assertTrue(rl.tryLock());
110	>	assertTrue(rl.isLocked());
111	>	rl.unlock();
112	>	}
113	>
114	>
115	>	/**
116	>	* hasQueuedThreads reports whether there are waiting threads
117	>	*/
118	>	public void testhasQueuedThreads() throws InterruptedException {
119	>	final ReentrantLock lock = new ReentrantLock();
120	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
121	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
122	>	assertFalse(lock.hasQueuedThreads());
123	>	lock.lock();
124	>	t1.start();
125	>	Thread.sleep(SHORT_DELAY_MS);
126	>	assertTrue(lock.hasQueuedThreads());
127	>	t2.start();
128	>	Thread.sleep(SHORT_DELAY_MS);
129	>	assertTrue(lock.hasQueuedThreads());
130	>	t1.interrupt();
131	>	Thread.sleep(SHORT_DELAY_MS);
132	>	assertTrue(lock.hasQueuedThreads());
133	>	lock.unlock();
134	>	Thread.sleep(SHORT_DELAY_MS);
135	>	assertFalse(lock.hasQueuedThreads());
136	>	t1.join();
137	>	t2.join();
138	>	}
139	>
140	>	/**
141	>	* getQueueLength reports number of waiting threads
142	>	*/
143	>	public void testGetQueueLength() throws InterruptedException {
144	>	final ReentrantLock lock = new ReentrantLock();
145	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
146	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
147	>	assertEquals(0, lock.getQueueLength());
148	>	lock.lock();
149	>	t1.start();
150	>	Thread.sleep(SHORT_DELAY_MS);
151	>	assertEquals(1, lock.getQueueLength());
152	>	t2.start();
153	>	Thread.sleep(SHORT_DELAY_MS);
154	>	assertEquals(2, lock.getQueueLength());
155	>	t1.interrupt();
156	>	Thread.sleep(SHORT_DELAY_MS);
157	>	assertEquals(1, lock.getQueueLength());
158	>	lock.unlock();
159	>	Thread.sleep(SHORT_DELAY_MS);
160	>	assertEquals(0, lock.getQueueLength());
161	>	t1.join();
162	>	t2.join();
163	>	}
164	>
165	>	/**
166	>	* getQueueLength reports number of waiting threads
167	>	*/
168	>	public void testGetQueueLength_fair() throws InterruptedException {
169	>	final ReentrantLock lock = new ReentrantLock(true);
170	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
171	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
172	>	assertEquals(0, lock.getQueueLength());
173	>	lock.lock();
174	>	t1.start();
175	>	Thread.sleep(SHORT_DELAY_MS);
176	>	assertEquals(1, lock.getQueueLength());
177	>	t2.start();
178	>	Thread.sleep(SHORT_DELAY_MS);
179	>	assertEquals(2, lock.getQueueLength());
180	>	t1.interrupt();
181	>	Thread.sleep(SHORT_DELAY_MS);
182	>	assertEquals(1, lock.getQueueLength());
183	>	lock.unlock();
184	>	Thread.sleep(SHORT_DELAY_MS);
185	>	assertEquals(0, lock.getQueueLength());
186	>	t1.join();
187	>	t2.join();
188	>	}
189	>
190	>	/**
191	>	* hasQueuedThread(null) throws NPE
192	>	*/
193	>	public void testHasQueuedThreadNPE() {
194	>	final ReentrantLock sync = new ReentrantLock();
195	>	try {
196	>	sync.hasQueuedThread(null);
197	>	shouldThrow();
198	>	} catch (NullPointerException success) {}
199		}
200
201	<
201	>	/**
202	>	* hasQueuedThread reports whether a thread is queued.
203	>	*/
204	>	public void testHasQueuedThread() throws InterruptedException {
205	>	final ReentrantLock sync = new ReentrantLock();
206	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
207	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
208	>	assertFalse(sync.hasQueuedThread(t1));
209	>	assertFalse(sync.hasQueuedThread(t2));
210	>	sync.lock();
211	>	t1.start();
212	>	Thread.sleep(SHORT_DELAY_MS);
213	>	assertTrue(sync.hasQueuedThread(t1));
214	>	t2.start();
215	>	Thread.sleep(SHORT_DELAY_MS);
216	>	assertTrue(sync.hasQueuedThread(t1));
217	>	assertTrue(sync.hasQueuedThread(t2));
218	>	t1.interrupt();
219	>	Thread.sleep(SHORT_DELAY_MS);
220	>	assertFalse(sync.hasQueuedThread(t1));
221	>	assertTrue(sync.hasQueuedThread(t2));
222	>	sync.unlock();
223	>	Thread.sleep(SHORT_DELAY_MS);
224	>	assertFalse(sync.hasQueuedThread(t1));
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	assertFalse(sync.hasQueuedThread(t2));
227	>	t1.join();
228	>	t2.join();
229	>	}
230	>
231	>
232	>	/**
233	>	* getQueuedThreads includes waiting threads
234	>	*/
235	>	public void testGetQueuedThreads() throws InterruptedException {
236	>	final PublicReentrantLock lock = new PublicReentrantLock();
237	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
238	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
239	>	assertTrue(lock.getQueuedThreads().isEmpty());
240	>	lock.lock();
241	>	assertTrue(lock.getQueuedThreads().isEmpty());
242	>	t1.start();
243	>	Thread.sleep(SHORT_DELAY_MS);
244	>	assertTrue(lock.getQueuedThreads().contains(t1));
245	>	t2.start();
246	>	Thread.sleep(SHORT_DELAY_MS);
247	>	assertTrue(lock.getQueuedThreads().contains(t1));
248	>	assertTrue(lock.getQueuedThreads().contains(t2));
249	>	t1.interrupt();
250	>	Thread.sleep(SHORT_DELAY_MS);
251	>	assertFalse(lock.getQueuedThreads().contains(t1));
252	>	assertTrue(lock.getQueuedThreads().contains(t2));
253	>	lock.unlock();
254	>	Thread.sleep(SHORT_DELAY_MS);
255	>	assertTrue(lock.getQueuedThreads().isEmpty());
256	>	t1.join();
257	>	t2.join();
258	>	}
259	>
260	>
261	>	/**
262	>	* timed tryLock is interruptible.
263	>	*/
264	>	public void testInterruptedException2() throws InterruptedException {
265	>	final ReentrantLock lock = new ReentrantLock();
266	>	lock.lock();
267	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
268	>	public void realRun() throws InterruptedException {
269	>	lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS);
270	>	}});
271	>
272	>	t.start();
273	>	Thread.sleep(SHORT_DELAY_MS);
274	>	t.interrupt();
275	>	t.join();
276	>	}
277	>
278	>
279	>	/**
280	>	* TryLock on a locked lock fails
281	>	*/
282	>	public void testTryLockWhenLocked() throws InterruptedException {
283	>	final ReentrantLock lock = new ReentrantLock();
284	>	lock.lock();
285	>	Thread t = new Thread(new CheckedRunnable() {
286	>	public void realRun() {
287	>	threadAssertFalse(lock.tryLock());
288	>	}});
289	>
290	>	t.start();
291	>	t.join();
292	>	lock.unlock();
293	>	}
294	>
295	>	/**
296	>	* Timed tryLock on a locked lock times out
297	>	*/
298	>	public void testTryLock_Timeout() throws InterruptedException {
299	>	final ReentrantLock lock = new ReentrantLock();
300	>	lock.lock();
301	>	Thread t = new Thread(new CheckedRunnable() {
302	>	public void realRun() throws InterruptedException {
303	>	threadAssertFalse(lock.tryLock(1, MILLISECONDS));
304	>	}});
305	>
306	>	t.start();
307	>	t.join();
308	>	lock.unlock();
309	>	}
310	>
311	>	/**
312	>	* getHoldCount returns number of recursive holds
313	>	*/
314		public void testGetHoldCount() {
315	<	ReentrantLock lock = new ReentrantLock();
316	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
317	<	lock.lock();
318	<	assertEquals(i,lock.getHoldCount());
319	<	}
320	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
321	<	lock.unlock();
322	<	assertEquals(i-1,lock.getHoldCount());
323	<	}
324	<	}
325	<
326	<
327	<
328	<
329	<	public void testIsLocked() {
330	<	final ReentrantLock lock = new ReentrantLock();
331	<	lock.lock();
332	<	assertTrue(lock.isLocked());
333	<	lock.unlock();
334	<	assertFalse(lock.isLocked());
335	<	Thread t = new Thread(new Runnable() {
336	<	public void run() {
337	<	lock.lock();
338	<	try {
339	<	Thread.sleep(SHORT_DELAY_MS * 2);
340	<	}
341	<	catch(Exception e) {}
342	<	lock.unlock();
343	<	}
344	<	});
345	<	try{
346	<	t.start();
347	<	Thread.sleep(SHORT_DELAY_MS);
348	<	assertTrue(lock.isLocked());
349	<	t.join();
350	<	assertFalse(lock.isLocked());
351	<	} catch(Exception e){
352	<	fail("unexpected exception");
353	<	}
354	<
355	<	}
356	<
357	<	/*
358	<	* current thread locks interruptibly the thread
359	<	* another thread tries to aquire the lock and blocks
360	<	* on the call. interrupt the attempted aquireLock
361	<	* assert that the first lock() call actually locked the lock
362	<	* assert that the current thread is the one holding the lock
363	<	*/
364	<
365	<	public void testLockedInterruptibly() {
366	<	final ReentrantLock lock = new ReentrantLock();
367	<	try {lock.lockInterruptibly();} catch(Exception e) {}
368	<	Thread t = new Thread(new Runnable() {
369	<	public void run() {
370	<	try {
371	<	lock.lockInterruptibly();
372	<	fail("Failed to generate an Interrupted Exception");
373	<	}
374	<	catch(InterruptedException e) {}
375	<	}
376	<	});
377	<	t.start();
378	<	t.interrupt();
379	<	assertTrue(lock.isLocked());
380	<	assertTrue(lock.isHeldByCurrentThread());
315	>	ReentrantLock lock = new ReentrantLock();
316	>	for (int i = 1; i <= SIZE; i++) {
317	>	lock.lock();
318	>	assertEquals(i, lock.getHoldCount());
319	>	}
320	>	for (int i = SIZE; i > 0; i--) {
321	>	lock.unlock();
322	>	assertEquals(i-1, lock.getHoldCount());
323	>	}
324	>	}
325	>
326	>
327	>	/**
328	>	* isLocked is true when locked and false when not
329	>	*/
330	>	public void testIsLocked() throws InterruptedException {
331	>	final ReentrantLock lock = new ReentrantLock();
332	>	lock.lock();
333	>	assertTrue(lock.isLocked());
334	>	lock.unlock();
335	>	assertFalse(lock.isLocked());
336	>	Thread t = new Thread(new CheckedRunnable() {
337	>	public void realRun() throws InterruptedException {
338	>	lock.lock();
339	>	Thread.sleep(SMALL_DELAY_MS);
340	>	lock.unlock();
341	>	}});
342	>
343	>	t.start();
344	>	Thread.sleep(SHORT_DELAY_MS);
345	>	assertTrue(lock.isLocked());
346	>	t.join();
347	>	assertFalse(lock.isLocked());
348	>	}
349	>
350	>
351	>	/**
352	>	* lockInterruptibly is interruptible.
353	>	*/
354	>	public void testLockInterruptibly1() throws InterruptedException {
355	>	final ReentrantLock lock = new ReentrantLock();
356	>	lock.lock();
357	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
358	>	t.start();
359	>	Thread.sleep(SHORT_DELAY_MS);
360	>	t.interrupt();
361	>	Thread.sleep(SHORT_DELAY_MS);
362	>	lock.unlock();
363	>	t.join();
364	>	}
365	>
366	>	/**
367	>	* lockInterruptibly succeeds when unlocked, else is interruptible
368	>	*/
369	>	public void testLockInterruptibly2() throws InterruptedException {
370	>	final ReentrantLock lock = new ReentrantLock();
371	>	lock.lockInterruptibly();
372	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
373	>	t.start();
374	>	Thread.sleep(SHORT_DELAY_MS);
375	>	t.interrupt();
376	>	assertTrue(lock.isLocked());
377	>	assertTrue(lock.isHeldByCurrentThread());
378	>	t.join();
379	>	}
380	>
381	>	/**
382	>	* Calling await without holding lock throws IllegalMonitorStateException
383	>	*/
384	>	public void testAwait_IllegalMonitor() throws InterruptedException {
385	>	final ReentrantLock lock = new ReentrantLock();
386	>	final Condition c = lock.newCondition();
387	>	try {
388	>	c.await();
389	>	shouldThrow();
390	>	} catch (IllegalMonitorStateException success) {}
391	>	}
392	>
393	>	/**
394	>	* Calling signal without holding lock throws IllegalMonitorStateException
395	>	*/
396	>	public void testSignal_IllegalMonitor() {
397	>	final ReentrantLock lock = new ReentrantLock();
398	>	final Condition c = lock.newCondition();
399	>	try {
400	>	c.signal();
401	>	shouldThrow();
402	>	} catch (IllegalMonitorStateException success) {}
403	>	}
404	>
405	>	/**
406	>	* awaitNanos without a signal times out
407	>	*/
408	>	public void testAwaitNanos_Timeout() throws InterruptedException {
409	>	final ReentrantLock lock = new ReentrantLock();
410	>	final Condition c = lock.newCondition();
411	>	lock.lock();
412	>	long t = c.awaitNanos(100);
413	>	assertTrue(t <= 0);
414	>	lock.unlock();
415	>	}
416	>
417	>	/**
418	>	*  timed await without a signal times out
419	>	*/
420	>	public void testAwait_Timeout() throws InterruptedException {
421	>	final ReentrantLock lock = new ReentrantLock();
422	>	final Condition c = lock.newCondition();
423	>	lock.lock();
424	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
425	>	lock.unlock();
426	>	}
427	>
428	>	/**
429	>	* awaitUntil without a signal times out
430	>	*/
431	>	public void testAwaitUntil_Timeout() throws InterruptedException {
432	>	final ReentrantLock lock = new ReentrantLock();
433	>	final Condition c = lock.newCondition();
434	>	lock.lock();
435	>	java.util.Date d = new java.util.Date();
436	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
437	>	lock.unlock();
438	>	}
439	>
440	>	/**
441	>	* await returns when signalled
442	>	*/
443	>	public void testAwait() throws InterruptedException {
444	>	final ReentrantLock lock = new ReentrantLock();
445	>	final Condition c = lock.newCondition();
446	>	Thread t = new Thread(new CheckedRunnable() {
447	>	public void realRun() throws InterruptedException {
448	>	lock.lock();
449	>	c.await();
450	>	lock.unlock();
451	>	}});
452	>
453	>	t.start();
454	>	Thread.sleep(SHORT_DELAY_MS);
455	>	lock.lock();
456	>	c.signal();
457	>	lock.unlock();
458	>	t.join(SHORT_DELAY_MS);
459	>	assertFalse(t.isAlive());
460	>	}
461	>
462	>	/**
463	>	* hasWaiters throws NPE if null
464	>	*/
465	>	public void testHasWaitersNPE() {
466	>	final ReentrantLock lock = new ReentrantLock();
467	>	try {
468	>	lock.hasWaiters(null);
469	>	shouldThrow();
470	>	} catch (NullPointerException success) {}
471	>	}
472	>
473	>	/**
474	>	* getWaitQueueLength throws NPE if null
475	>	*/
476	>	public void testGetWaitQueueLengthNPE() {
477	>	final ReentrantLock lock = new ReentrantLock();
478	>	try {
479	>	lock.getWaitQueueLength(null);
480	>	shouldThrow();
481	>	} catch (NullPointerException success) {}
482	>	}
483	>
484	>
485	>	/**
486	>	* getWaitingThreads throws NPE if null
487	>	*/
488	>	public void testGetWaitingThreadsNPE() {
489	>	final PublicReentrantLock lock = new PublicReentrantLock();
490	>	try {
491	>	lock.getWaitingThreads(null);
492	>	shouldThrow();
493	>	} catch (NullPointerException success) {}
494	>	}
495	>
496	>
497	>	/**
498	>	* hasWaiters throws IAE if not owned
499	>	*/
500	>	public void testHasWaitersIAE() {
501	>	final ReentrantLock lock = new ReentrantLock();
502	>	final Condition c = lock.newCondition();
503	>	final ReentrantLock lock2 = new ReentrantLock();
504	>	try {
505	>	lock2.hasWaiters(c);
506	>	shouldThrow();
507	>	} catch (IllegalArgumentException success) {}
508	>	}
509	>
510	>	/**
511	>	* hasWaiters throws IMSE if not locked
512	>	*/
513	>	public void testHasWaitersIMSE() {
514	>	final ReentrantLock lock = new ReentrantLock();
515	>	final Condition c = lock.newCondition();
516	>	try {
517	>	lock.hasWaiters(c);
518	>	shouldThrow();
519	>	} catch (IllegalMonitorStateException success) {}
520	>	}
521	>
522	>
523	>	/**
524	>	* getWaitQueueLength throws IAE if not owned
525	>	*/
526	>	public void testGetWaitQueueLengthIAE() {
527	>	final ReentrantLock lock = new ReentrantLock();
528	>	final Condition c = lock.newCondition();
529	>	final ReentrantLock lock2 = new ReentrantLock();
530	>	try {
531	>	lock2.getWaitQueueLength(c);
532	>	shouldThrow();
533	>	} catch (IllegalArgumentException success) {}
534	>	}
535	>
536	>	/**
537	>	* getWaitQueueLength throws IMSE if not locked
538	>	*/
539	>	public void testGetWaitQueueLengthIMSE() {
540	>	final ReentrantLock lock = new ReentrantLock();
541	>	final Condition c = lock.newCondition();
542	>	try {
543	>	lock.getWaitQueueLength(c);
544	>	shouldThrow();
545	>	} catch (IllegalMonitorStateException success) {}
546	>	}
547	>
548	>
549	>	/**
550	>	* getWaitingThreads throws IAE if not owned
551	>	*/
552	>	public void testGetWaitingThreadsIAE() {
553	>	final PublicReentrantLock lock = new PublicReentrantLock();
554	>	final Condition c = lock.newCondition();
555	>	final PublicReentrantLock lock2 = new PublicReentrantLock();
556	>	try {
557	>	lock2.getWaitingThreads(c);
558	>	shouldThrow();
559	>	} catch (IllegalArgumentException success) {}
560	>	}
561	>
562	>	/**
563	>	* getWaitingThreads throws IMSE if not locked
564	>	*/
565	>	public void testGetWaitingThreadsIMSE() {
566	>	final PublicReentrantLock lock = new PublicReentrantLock();
567	>	final Condition c = lock.newCondition();
568	>	try {
569	>	lock.getWaitingThreads(c);
570	>	shouldThrow();
571	>	} catch (IllegalMonitorStateException success) {}
572	>	}
573	>
574	>
575	>	/**
576	>	* hasWaiters returns true when a thread is waiting, else false
577	>	*/
578	>	public void testHasWaiters() throws InterruptedException {
579	>	final ReentrantLock lock = new ReentrantLock();
580	>	final Condition c = lock.newCondition();
581	>	Thread t = new Thread(new CheckedRunnable() {
582	>	public void realRun() throws InterruptedException {
583	>	lock.lock();
584	>	threadAssertFalse(lock.hasWaiters(c));
585	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
586	>	c.await();
587	>	lock.unlock();
588	>	}});
589	>
590	>	t.start();
591	>	Thread.sleep(SHORT_DELAY_MS);
592	>	lock.lock();
593	>	assertTrue(lock.hasWaiters(c));
594	>	assertEquals(1, lock.getWaitQueueLength(c));
595	>	c.signal();
596	>	lock.unlock();
597	>	Thread.sleep(SHORT_DELAY_MS);
598	>	lock.lock();
599	>	assertFalse(lock.hasWaiters(c));
600	>	assertEquals(0, lock.getWaitQueueLength(c));
601	>	lock.unlock();
602	>	t.join(SHORT_DELAY_MS);
603	>	assertFalse(t.isAlive());
604	>	}
605	>
606	>	/**
607	>	* getWaitQueueLength returns number of waiting threads
608	>	*/
609	>	public void testGetWaitQueueLength() throws InterruptedException {
610	>	final ReentrantLock lock = new ReentrantLock();
611	>	final Condition c = lock.newCondition();
612	>	Thread t1 = new Thread(new CheckedRunnable() {
613	>	public void realRun() throws InterruptedException {
614	>	lock.lock();
615	>	threadAssertFalse(lock.hasWaiters(c));
616	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
617	>	c.await();
618	>	lock.unlock();
619	>	}});
620	>
621	>	Thread t2 = new Thread(new CheckedRunnable() {
622	>	public void realRun() throws InterruptedException {
623	>	lock.lock();
624	>	threadAssertTrue(lock.hasWaiters(c));
625	>	threadAssertEquals(1, lock.getWaitQueueLength(c));
626	>	c.await();
627	>	lock.unlock();
628	>	}});
629	>
630	>	t1.start();
631	>	Thread.sleep(SHORT_DELAY_MS);
632	>	t2.start();
633	>	Thread.sleep(SHORT_DELAY_MS);
634	>	lock.lock();
635	>	assertTrue(lock.hasWaiters(c));
636	>	assertEquals(2, lock.getWaitQueueLength(c));
637	>	c.signalAll();
638	>	lock.unlock();
639	>	Thread.sleep(SHORT_DELAY_MS);
640	>	lock.lock();
641	>	assertFalse(lock.hasWaiters(c));
642	>	assertEquals(0, lock.getWaitQueueLength(c));
643	>	lock.unlock();
644	>	t1.join(SHORT_DELAY_MS);
645	>	t2.join(SHORT_DELAY_MS);
646	>	assertFalse(t1.isAlive());
647	>	assertFalse(t2.isAlive());
648	>	}
649	>
650	>	/**
651	>	* getWaitingThreads returns only and all waiting threads
652	>	*/
653	>	public void testGetWaitingThreads() throws InterruptedException {
654	>	final PublicReentrantLock lock = new PublicReentrantLock();
655	>	final Condition c = lock.newCondition();
656	>	Thread t1 = new Thread(new CheckedRunnable() {
657	>	public void realRun() throws InterruptedException {
658	>	lock.lock();
659	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
660	>	c.await();
661	>	lock.unlock();
662	>	}});
663	>
664	>	Thread t2 = new Thread(new CheckedRunnable() {
665	>	public void realRun() throws InterruptedException {
666	>	lock.lock();
667	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
668	>	c.await();
669	>	lock.unlock();
670	>	}});
671	>
672	>	lock.lock();
673	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
674	>	lock.unlock();
675	>	t1.start();
676	>	Thread.sleep(SHORT_DELAY_MS);
677	>	t2.start();
678	>	Thread.sleep(SHORT_DELAY_MS);
679	>	lock.lock();
680	>	assertTrue(lock.hasWaiters(c));
681	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
682	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
683	>	c.signalAll();
684	>	lock.unlock();
685	>	Thread.sleep(SHORT_DELAY_MS);
686	>	lock.lock();
687	>	assertFalse(lock.hasWaiters(c));
688	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
689	>	lock.unlock();
690	>	t1.join(SHORT_DELAY_MS);
691	>	t2.join(SHORT_DELAY_MS);
692	>	assertFalse(t1.isAlive());
693	>	assertFalse(t2.isAlive());
694	>	}
695	>
696	>	/** A helper class for uninterruptible wait tests */
697	>	class UninterruptibleThread extends Thread {
698	>	private ReentrantLock lock;
699	>	private Condition c;
700	>
701	>	public volatile boolean canAwake = false;
702	>	public volatile boolean interrupted = false;
703	>	public volatile boolean lockStarted = false;
704	>
705	>	public UninterruptibleThread(ReentrantLock lock, Condition c) {
706	>	this.lock = lock;
707	>	this.c = c;
708	>	}
709	>
710	>	public synchronized void run() {
711	>	lock.lock();
712	>	lockStarted = true;
713	>
714	>	while (!canAwake) {
715	>	c.awaitUninterruptibly();
716	>	}
717	>
718	>	interrupted = isInterrupted();
719	>	lock.unlock();
720	>	}
721	>	}
722	>
723	>	/**
724	>	* awaitUninterruptibly doesn't abort on interrupt
725	>	*/
726	>	public void testAwaitUninterruptibly() throws InterruptedException {
727	>	final ReentrantLock lock = new ReentrantLock();
728	>	final Condition c = lock.newCondition();
729	>	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
730	>
731	>	thread.start();
732	>
733	>	while (!thread.lockStarted) {
734	>	Thread.sleep(100);
735	>	}
736	>
737	>	lock.lock();
738	>	try {
739	>	thread.interrupt();
740	>	thread.canAwake = true;
741	>	c.signal();
742	>	} finally {
743	>	lock.unlock();
744	>	}
745	>
746	>	thread.join();
747	>	assertTrue(thread.interrupted);
748	>	assertFalse(thread.isAlive());
749	>	}
750	>
751	>	/**
752	>	* await is interruptible
753	>	*/
754	>	public void testAwait_Interrupt() throws InterruptedException {
755	>	final ReentrantLock lock = new ReentrantLock();
756	>	final Condition c = lock.newCondition();
757	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
758	>	public void realRun() throws InterruptedException {
759	>	lock.lock();
760	>	c.await();
761	>	}});
762	>
763	>	t.start();
764	>	Thread.sleep(SHORT_DELAY_MS);
765	>	t.interrupt();
766	>	t.join(SHORT_DELAY_MS);
767	>	assertFalse(t.isAlive());
768	>	}
769	>
770	>	/**
771	>	* awaitNanos is interruptible
772	>	*/
773	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
774	>	final ReentrantLock lock = new ReentrantLock();
775	>	final Condition c = lock.newCondition();
776	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
777	>	public void realRun() throws InterruptedException {
778	>	lock.lock();
779	>	c.awaitNanos(LONG_DELAY_MS * 1000L * 1000L);
780	>	}});
781	>
782	>	t.start();
783	>	Thread.sleep(SHORT_DELAY_MS);
784	>	t.interrupt();
785	>	t.join(SHORT_DELAY_MS);
786	>	assertFalse(t.isAlive());
787	>	}
788	>
789	>	/**
790	>	* awaitUntil is interruptible
791	>	*/
792	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
793	>	final ReentrantLock lock = new ReentrantLock();
794	>	final Condition c = lock.newCondition();
795	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
796	>	public void realRun() throws InterruptedException {
797	>	lock.lock();
798	>	java.util.Date d = new java.util.Date();
799	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
800	>	}});
801	>
802	>	t.start();
803	>	Thread.sleep(SHORT_DELAY_MS);
804	>	t.interrupt();
805	>	t.join(SHORT_DELAY_MS);
806	>	assertFalse(t.isAlive());
807	>	}
808	>
809	>	/**
810	>	* signalAll wakes up all threads
811	>	*/
812	>	public void testSignalAll() throws InterruptedException {
813	>	final ReentrantLock lock = new ReentrantLock();
814	>	final Condition c = lock.newCondition();
815	>	Thread t1 = new Thread(new CheckedRunnable() {
816	>	public void realRun() throws InterruptedException {
817	>	lock.lock();
818	>	c.await();
819	>	lock.unlock();
820	>	}});
821	>
822	>	Thread t2 = new Thread(new CheckedRunnable() {
823	>	public void realRun() throws InterruptedException {
824	>	lock.lock();
825	>	c.await();
826	>	lock.unlock();
827	>	}});
828	>
829	>	t1.start();
830	>	t2.start();
831	>	Thread.sleep(SHORT_DELAY_MS);
832	>	lock.lock();
833	>	c.signalAll();
834	>	lock.unlock();
835	>	t1.join(SHORT_DELAY_MS);
836	>	t2.join(SHORT_DELAY_MS);
837	>	assertFalse(t1.isAlive());
838	>	assertFalse(t2.isAlive());
839	>	}
840	>
841	>	/**
842	>	* await after multiple reentrant locking preserves lock count
843	>	*/
844	>	public void testAwaitLockCount() throws InterruptedException {
845	>	final ReentrantLock lock = new ReentrantLock();
846	>	final Condition c = lock.newCondition();
847	>	Thread t1 = new Thread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.lock();
850	>	threadAssertEquals(1, lock.getHoldCount());
851	>	c.await();
852	>	threadAssertEquals(1, lock.getHoldCount());
853	>	lock.unlock();
854	>	}});
855	>
856	>	Thread t2 = new Thread(new CheckedRunnable() {
857	>	public void realRun() throws InterruptedException {
858	>	lock.lock();
859	>	lock.lock();
860	>	threadAssertEquals(2, lock.getHoldCount());
861	>	c.await();
862	>	threadAssertEquals(2, lock.getHoldCount());
863	>	lock.unlock();
864	>	lock.unlock();
865	>	}});
866	>
867	>	t1.start();
868	>	t2.start();
869	>	Thread.sleep(SHORT_DELAY_MS);
870	>	lock.lock();
871	>	c.signalAll();
872	>	lock.unlock();
873	>	t1.join(SHORT_DELAY_MS);
874	>	t2.join(SHORT_DELAY_MS);
875	>	assertFalse(t1.isAlive());
876	>	assertFalse(t2.isAlive());
877	>	}
878	>
879	>	/**
880	>	* A serialized lock deserializes as unlocked
881	>	*/
882	>	public void testSerialization() throws Exception {
883	>	ReentrantLock l = new ReentrantLock();
884	>	l.lock();
885	>	l.unlock();
886	>
887	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
888	>	ObjectOutputStream out =
889	>	new ObjectOutputStream(new BufferedOutputStream(bout));
890	>	out.writeObject(l);
891	>	out.close();
892	>
893	>	ByteArrayInputStream bin =
894	>	new ByteArrayInputStream(bout.toByteArray());
895	>	ObjectInputStream in =
896	>	new ObjectInputStream(new BufferedInputStream(bin));
897	>	ReentrantLock r = (ReentrantLock) in.readObject();
898	>	r.lock();
899	>	r.unlock();
900	>	}
901	>
902	>	/**
903	>	* toString indicates current lock state
904	>	*/
905	>	public void testToString() {
906	>	ReentrantLock lock = new ReentrantLock();
907	>	String us = lock.toString();
908	>	assertTrue(us.indexOf("Unlocked") >= 0);
909	>	lock.lock();
910	>	String ls = lock.toString();
911	>	assertTrue(ls.indexOf("Locked") >= 0);
912		}
155	–
913
914		}

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