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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.11 by dl, Sat Dec 27 18:27:02 2003 UTC

#	Line 8 | Line 8
8		import junit.framework.*;
9		import java.util.concurrent.locks.*;
10		import java.util.concurrent.*;
11	+	import java.util.*;
12		import java.io.*;
13
14	<	public class ReentrantLockTest extends TestCase {
14	<	static int HOLD_COUNT_TEST_LIMIT = 20;
15	<
14	>	public class ReentrantLockTest extends JSR166TestCase {
15		public static void main(String[] args) {
16		junit.textui.TestRunner.run (suite());
17		}
19	–
18		public static Test suite() {
19		return new TestSuite(ReentrantLockTest.class);
20		}
21
22	<	private static long SHORT_DELAY_MS = 100;
23	<	private static long MEDIUM_DELAY_MS = 1000;
26	<	private static long LONG_DELAY_MS = 10000;
27	<
28	<	/*
29	<	* Unlocks an unlocked lock, throws Illegal Monitor State
30	<	*
22	>	/**
23	>	* A runnable calling lockInterruptibly
24		*/
25	<
26	<	public void testIllegalMonitorStateException(){
25	>	class InterruptibleLockRunnable implements Runnable {
26	>	final ReentrantLock lock;
27	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
28	>	public void run() {
29	>	try {
30	>	lock.lockInterruptibly();
31	>	} catch(InterruptedException success){}
32	>	}
33	>	}
34	>
35	>
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39	>	*/
40	>	class InterruptedLockRunnable implements Runnable {
41	>	final ReentrantLock lock;
42	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	>	public void run() {
44	>	try {
45	>	lock.lockInterruptibly();
46	>	threadShouldThrow();
47	>	} catch(InterruptedException success){}
48	>	}
49	>	}
50	>
51	>	/**
52	>	* Subclass to expose protected methods
53	>	*/
54	>	static class PublicReentrantLock extends ReentrantLock {
55	>	PublicReentrantLock() { super(); }
56	>	public Collection<Thread> getQueuedThreads() {
57	>	return super.getQueuedThreads();
58	>	}
59	>
60	>	}
61	>
62	>	/**
63	>	* Constructor sets given fairness
64	>	*/
65	>	public void testConstructor() {
66		ReentrantLock rl = new ReentrantLock();
67	<	try{
68	<	rl.unlock();
69	<	fail("Should of thown Illegal Monitor State Exception");
67	>	assertFalse(rl.isFair());
68	>	ReentrantLock r2 = new ReentrantLock(true);
69	>	assertTrue(r2.isFair());
70	>	}
71
72	<	} catch(IllegalMonitorStateException success){}
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	>	}
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 testUnlock_IllegalMonitorStateException() {
96	+	ReentrantLock rl = new ReentrantLock();
97	+	try {
98	+	rl.unlock();
99	+	shouldThrow();
100
101	+	} catch(IllegalMonitorStateException success){}
102		}
103	<
104	<	/*
105	<	* makes a lock, locks it, tries to aquire the lock in another thread
46	<	* interrupts that thread and waits for an interrupted Exception to
47	<	* be thrown.
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	<	public void testInterruptedException(){
115	>	/**
116	>	* getQueueLength reports number of waiting threads
117	>	*/
118	>	public void testGetQueueLength() {
119		final ReentrantLock lock = new ReentrantLock();
120	<	lock.lock();
121	<	Thread t = new Thread(new Runnable() {
122	<	public void run(){
123	<	try{
124	<	lock.lockInterruptibly();
125	<	fail("should throw");
126	<	} catch(InterruptedException success){}
127	<	}
128	<	});
129	<	t.start();
130	<	t.interrupt();
131	<	lock.unlock();
120	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
121	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
122	>	try {
123	>	assertEquals(0, lock.getQueueLength());
124	>	lock.lock();
125	>	t1.start();
126	>	Thread.sleep(SHORT_DELAY_MS);
127	>	assertEquals(1, lock.getQueueLength());
128	>	t2.start();
129	>	Thread.sleep(SHORT_DELAY_MS);
130	>	assertEquals(2, lock.getQueueLength());
131	>	t1.interrupt();
132	>	Thread.sleep(SHORT_DELAY_MS);
133	>	assertEquals(1, lock.getQueueLength());
134	>	lock.unlock();
135	>	Thread.sleep(SHORT_DELAY_MS);
136	>	assertEquals(0, lock.getQueueLength());
137	>	t1.join();
138	>	t2.join();
139	>	} catch(Exception e){
140	>	unexpectedException();
141	>	}
142		}
143
144	<	/*
145	<	* tests for interrupted exception on a timed wait
68	<	*
144	>	/**
145	>	* getQueuedThreads includes waiting threads
146		*/
147	<
147	>	public void testGetQueuedThreads() {
148	>	final PublicReentrantLock lock = new PublicReentrantLock();
149	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
150	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
151	>	try {
152	>	assertTrue(lock.getQueuedThreads().isEmpty());
153	>	lock.lock();
154	>	assertTrue(lock.getQueuedThreads().isEmpty());
155	>	t1.start();
156	>	Thread.sleep(SHORT_DELAY_MS);
157	>	assertTrue(lock.getQueuedThreads().contains(t1));
158	>	t2.start();
159	>	Thread.sleep(SHORT_DELAY_MS);
160	>	assertTrue(lock.getQueuedThreads().contains(t1));
161	>	assertTrue(lock.getQueuedThreads().contains(t2));
162	>	t1.interrupt();
163	>	Thread.sleep(SHORT_DELAY_MS);
164	>	assertFalse(lock.getQueuedThreads().contains(t1));
165	>	assertTrue(lock.getQueuedThreads().contains(t2));
166	>	lock.unlock();
167	>	Thread.sleep(SHORT_DELAY_MS);
168	>	assertTrue(lock.getQueuedThreads().isEmpty());
169	>	t1.join();
170	>	t2.join();
171	>	} catch(Exception e){
172	>	unexpectedException();
173	>	}
174	>	}
175	>
176
177	<	public void testInterruptedException2(){
177	>	/**
178	>	* timed trylock is interruptible.
179	>	*/
180	>	public void testInterruptedException2() {
181		final ReentrantLock lock = new ReentrantLock();
182		lock.lock();
183		Thread t = new Thread(new Runnable() {
184	<	public void run(){
185	<	try{
186	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
187	<	fail("should throw");
184	>	public void run() {
185	>	try {
186	>	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
187	>	threadShouldThrow();
188		} catch(InterruptedException success){}
189		}
190		});
191	<	t.start();
192	<	t.interrupt();
191	>	try {
192	>	t.start();
193	>	t.interrupt();
194	>	} catch(Exception e){
195	>	unexpectedException();
196	>	}
197		}
198
199
200	+	/**
201	+	* Trylock on a locked lock fails
202	+	*/
203		public void testTryLockWhenLocked() {
204		final ReentrantLock lock = new ReentrantLock();
205		lock.lock();
206		Thread t = new Thread(new Runnable() {
207	<	public void run(){
208	<	assertFalse(lock.tryLock());
207	>	public void run() {
208	>	threadAssertFalse(lock.tryLock());
209		}
210		});
211		try {
#	Line 98 | Line 213 | public class ReentrantLockTest extends T
213		t.join();
214		lock.unlock();
215		} catch(Exception e){
216	<	fail("unexpected exception");
216	>	unexpectedException();
217		}
218		}
219
220	<	public void testTryLock_Timeout(){
220	>	/**
221	>	* Timed trylock on a locked lock times out
222	>	*/
223	>	public void testTryLock_Timeout() {
224		final ReentrantLock lock = new ReentrantLock();
225		lock.lock();
226		Thread t = new Thread(new Runnable() {
227	<	public void run(){
227	>	public void run() {
228		try {
229	<	assertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
229	>	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
230		} catch (Exception ex) {
231	<	fail("unexpected exception");
231	>	threadUnexpectedException();
232		}
233		}
234		});
#	Line 119 | Line 237 | public class ReentrantLockTest extends T
237		t.join();
238		lock.unlock();
239		} catch(Exception e){
240	<	fail("unexpected exception");
240	>	unexpectedException();
241		}
242		}
243
244	+	/**
245	+	* getHoldCount returns number of recursive holds
246	+	*/
247		public void testGetHoldCount() {
248		ReentrantLock lock = new ReentrantLock();
249	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
249	>	for(int i = 1; i <= SIZE; i++) {
250		lock.lock();
251		assertEquals(i,lock.getHoldCount());
252		}
253	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
253	>	for(int i = SIZE; i > 0; i--) {
254		lock.unlock();
255		assertEquals(i-1,lock.getHoldCount());
256		}
257		}
258
259
260	<
261	<
260	>	/**
261	>	* isLocked is true when locked and false when not
262	>	*/
263		public void testIsLocked() {
264		final ReentrantLock lock = new ReentrantLock();
265		lock.lock();
#	Line 148 | Line 270 | public class ReentrantLockTest extends T
270		public void run() {
271		lock.lock();
272		try {
273	<	Thread.sleep(SHORT_DELAY_MS * 2);
273	>	Thread.sleep(SMALL_DELAY_MS);
274		}
275	<	catch(Exception e) {}
275	>	catch(Exception e) {
276	>	threadUnexpectedException();
277	>	}
278		lock.unlock();
279		}
280		});
281	<	try{
281	>	try {
282		t.start();
283		Thread.sleep(SHORT_DELAY_MS);
284		assertTrue(lock.isLocked());
285		t.join();
286		assertFalse(lock.isLocked());
287		} catch(Exception e){
288	<	fail("unexpected exception");
288	>	unexpectedException();
289		}
290		}
291
292
293	<	public void testLockInterruptibly() {
293	>	/**
294	>	* lockInterruptibly is interruptible.
295	>	*/
296	>	public void testLockInterruptibly1() {
297	>	final ReentrantLock lock = new ReentrantLock();
298	>	lock.lock();
299	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
300	>	try {
301	>	t.start();
302	>	t.interrupt();
303	>	lock.unlock();
304	>	t.join();
305	>	} catch(Exception e){
306	>	unexpectedException();
307	>	}
308	>	}
309	>
310	>	/**
311	>	* lockInterruptibly succeeds when unlocked, else is interruptible
312	>	*/
313	>	public void testLockInterruptibly2() {
314		final ReentrantLock lock = new ReentrantLock();
315		try {
316		lock.lockInterruptibly();
317		} catch(Exception e) {
318	<	fail("unexpected exception");
318	>	unexpectedException();
319		}
320	<	Thread t = new Thread(new Runnable() {
177	<	public void run() {
178	<	try {
179	<	lock.lockInterruptibly();
180	<	fail("should throw");
181	<	}
182	<	catch(InterruptedException e) {}
183	<	}
184	<	});
320	>	Thread t = new Thread(new InterruptedLockRunnable(lock));
321		try {
322		t.start();
323		t.interrupt();
#	Line 189 | Line 325 | public class ReentrantLockTest extends T
325		assertTrue(lock.isHeldByCurrentThread());
326		t.join();
327		} catch(Exception e){
328	<	fail("unexpected exception");
328	>	unexpectedException();
329		}
330		}
331
332	+	/**
333	+	* Calling await without holding lock throws IllegalMonitorStateException
334	+	*/
335		public void testAwait_IllegalMonitor() {
336		final ReentrantLock lock = new ReentrantLock();
337		final Condition c = lock.newCondition();
338		try {
339		c.await();
340	<	fail("should throw");
340	>	shouldThrow();
341		}
342		catch (IllegalMonitorStateException success) {
343		}
344		catch (Exception ex) {
345	<	fail("should throw IMSE");
345	>	unexpectedException();
346		}
347		}
348
349	+	/**
350	+	* Calling signal without holding lock throws IllegalMonitorStateException
351	+	*/
352		public void testSignal_IllegalMonitor() {
353		final ReentrantLock lock = new ReentrantLock();
354		final Condition c = lock.newCondition();
355		try {
356		c.signal();
357	<	fail("should throw");
357	>	shouldThrow();
358		}
359		catch (IllegalMonitorStateException success) {
360		}
361		catch (Exception ex) {
362	<	fail("should throw IMSE");
362	>	unexpectedException();
363		}
364		}
365
366	+	/**
367	+	* awaitNanos without a signal times out
368	+	*/
369		public void testAwaitNanos_Timeout() {
370		final ReentrantLock lock = new ReentrantLock();
371		final Condition c = lock.newCondition();
#	Line 231 | Line 376 | public class ReentrantLockTest extends T
376		lock.unlock();
377		}
378		catch (Exception ex) {
379	<	fail("unexpected exception");
379	>	unexpectedException();
380		}
381		}
382
383	+	/**
384	+	*  timed await without a signal times out
385	+	*/
386		public void testAwait_Timeout() {
387		final ReentrantLock lock = new ReentrantLock();
388		final Condition c = lock.newCondition();
389		try {
390		lock.lock();
391	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
391	>	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
392		lock.unlock();
393		}
394		catch (Exception ex) {
395	<	fail("unexpected exception");
395	>	unexpectedException();
396		}
397		}
398
399	+	/**
400	+	* awaitUntil without a signal times out
401	+	*/
402		public void testAwaitUntil_Timeout() {
403		final ReentrantLock lock = new ReentrantLock();
404		final Condition c = lock.newCondition();
#	Line 258 | Line 409 | public class ReentrantLockTest extends T
409		lock.unlock();
410		}
411		catch (Exception ex) {
412	<	fail("unexpected exception");
412	>	unexpectedException();
413		}
414		}
415
416	+	/**
417	+	* await returns when signalled
418	+	*/
419		public void testAwait() {
420		final ReentrantLock lock = new ReentrantLock();
421	<	final Condition c = lock.newCondition();
421	>	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
422	>	Thread t = new Thread(new Runnable() {
423	>	public void run() {
424	>	try {
425	>	lock.lock();
426	>	c.await();
427	>	lock.unlock();
428	>	}
429	>	catch(InterruptedException e) {
430	>	threadUnexpectedException();
431	>	}
432	>	}
433	>	});
434	>
435	>	try {
436	>	t.start();
437	>	Thread.sleep(SHORT_DELAY_MS);
438	>	lock.lock();
439	>	c.signal();
440	>	lock.unlock();
441	>	t.join(SHORT_DELAY_MS);
442	>	assertFalse(t.isAlive());
443	>	}
444	>	catch (Exception ex) {
445	>	unexpectedException();
446	>	}
447	>	}
448	>
449	>	/**
450	>	* hasWaiters returns true when a thread is waiting, else false
451	>	*/
452	>	public void testHasWaiters() {
453	>	final ReentrantLock lock = new ReentrantLock();
454	>	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
455		Thread t = new Thread(new Runnable() {
456		public void run() {
457		try {
458		lock.lock();
459	+	threadAssertFalse(c.hasWaiters());
460	+	threadAssertEquals(0, c.getWaitQueueLength());
461		c.await();
462		lock.unlock();
463		}
464		catch(InterruptedException e) {
465	<	fail("unexpected exception");
465	>	threadUnexpectedException();
466		}
467		}
468		});
#	Line 282 | Line 471 | public class ReentrantLockTest extends T
471		t.start();
472		Thread.sleep(SHORT_DELAY_MS);
473		lock.lock();
474	+	assertTrue(c.hasWaiters());
475	+	assertEquals(1, c.getWaitQueueLength());
476		c.signal();
477		lock.unlock();
478	+	Thread.sleep(SHORT_DELAY_MS);
479	+	lock.lock();
480	+	assertFalse(c.hasWaiters());
481	+	assertEquals(0, c.getWaitQueueLength());
482	+	lock.unlock();
483		t.join(SHORT_DELAY_MS);
484		assertFalse(t.isAlive());
485		}
486		catch (Exception ex) {
487	<	fail("unexpected exception");
487	>	unexpectedException();
488		}
489		}
490
491	+	/**
492	+	* getWaitQueueLength returns number of waiting threads
493	+	*/
494	+	public void testGetWaitQueueLength() {
495	+	final ReentrantLock lock = new ReentrantLock();
496	+	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
497	+	Thread t1 = new Thread(new Runnable() {
498	+	public void run() {
499	+	try {
500	+	lock.lock();
501	+	threadAssertFalse(c.hasWaiters());
502	+	threadAssertEquals(0, c.getWaitQueueLength());
503	+	c.await();
504	+	lock.unlock();
505	+	}
506	+	catch(InterruptedException e) {
507	+	threadUnexpectedException();
508	+	}
509	+	}
510	+	});
511	+
512	+	Thread t2 = new Thread(new Runnable() {
513	+	public void run() {
514	+	try {
515	+	lock.lock();
516	+	threadAssertTrue(c.hasWaiters());
517	+	threadAssertEquals(1, c.getWaitQueueLength());
518	+	c.await();
519	+	lock.unlock();
520	+	}
521	+	catch(InterruptedException e) {
522	+	threadUnexpectedException();
523	+	}
524	+	}
525	+	});
526	+
527	+	try {
528	+	t1.start();
529	+	Thread.sleep(SHORT_DELAY_MS);
530	+	t2.start();
531	+	Thread.sleep(SHORT_DELAY_MS);
532	+	lock.lock();
533	+	assertTrue(c.hasWaiters());
534	+	assertEquals(2, c.getWaitQueueLength());
535	+	c.signalAll();
536	+	lock.unlock();
537	+	Thread.sleep(SHORT_DELAY_MS);
538	+	lock.lock();
539	+	assertFalse(c.hasWaiters());
540	+	assertEquals(0, c.getWaitQueueLength());
541	+	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	+	unexpectedException();
549	+	}
550	+	}
551	+
552	+	/**
553	+	* awaitUninterruptibly doesn't abort on interrupt
554	+	*/
555		public void testAwaitUninterruptibly() {
556		final ReentrantLock lock = new ReentrantLock();
557		final Condition c = lock.newCondition();
#	Line 310 | Line 570 | public class ReentrantLockTest extends T
570		lock.lock();
571		c.signal();
572		lock.unlock();
573	+	assert(t.isInterrupted());
574		t.join(SHORT_DELAY_MS);
575		assertFalse(t.isAlive());
576		}
577		catch (Exception ex) {
578	<	fail("unexpected exception");
578	>	unexpectedException();
579		}
580		}
581
582	+	/**
583	+	* await is interruptible
584	+	*/
585		public void testAwait_Interrupt() {
586		final ReentrantLock lock = new ReentrantLock();
587		final Condition c = lock.newCondition();
#	Line 327 | Line 591 | public class ReentrantLockTest extends T
591		lock.lock();
592		c.await();
593		lock.unlock();
594	<	fail("should throw");
594	>	threadShouldThrow();
595		}
596		catch(InterruptedException success) {
597		}
#	Line 342 | Line 606 | public class ReentrantLockTest extends T
606		assertFalse(t.isAlive());
607		}
608		catch (Exception ex) {
609	<	fail("unexpected exception");
609	>	unexpectedException();
610		}
611		}
612
613	+	/**
614	+	* awaitNanos is interruptible
615	+	*/
616		public void testAwaitNanos_Interrupt() {
617		final ReentrantLock lock = new ReentrantLock();
618		final Condition c = lock.newCondition();
#	Line 355 | Line 622 | public class ReentrantLockTest extends T
622		lock.lock();
623		c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
624		lock.unlock();
625	<	fail("should throw");
625	>	threadShouldThrow();
626		}
627		catch(InterruptedException success) {
628		}
#	Line 370 | Line 637 | public class ReentrantLockTest extends T
637		assertFalse(t.isAlive());
638		}
639		catch (Exception ex) {
640	<	fail("unexpected exception");
640	>	unexpectedException();
641		}
642		}
643
644	+	/**
645	+	* awaitUntil is interruptible
646	+	*/
647		public void testAwaitUntil_Interrupt() {
648		final ReentrantLock lock = new ReentrantLock();
649		final Condition c = lock.newCondition();
#	Line 384 | Line 654 | public class ReentrantLockTest extends T
654		java.util.Date d = new java.util.Date();
655		c.awaitUntil(new java.util.Date(d.getTime() + 10000));
656		lock.unlock();
657	<	fail("should throw");
657	>	threadShouldThrow();
658		}
659		catch(InterruptedException success) {
660		}
#	Line 399 | Line 669 | public class ReentrantLockTest extends T
669		assertFalse(t.isAlive());
670		}
671		catch (Exception ex) {
672	<	fail("unexpected exception");
672	>	unexpectedException();
673		}
674		}
675
676	+	/**
677	+	* signalAll wakes up all threads
678	+	*/
679		public void testSignalAll() {
680		final ReentrantLock lock = new ReentrantLock();
681		final Condition c = lock.newCondition();
#	Line 414 | Line 687 | public class ReentrantLockTest extends T
687		lock.unlock();
688		}
689		catch(InterruptedException e) {
690	<	fail("unexpected exception");
690	>	threadUnexpectedException();
691		}
692		}
693		});
#	Line 427 | Line 700 | public class ReentrantLockTest extends T
700		lock.unlock();
701		}
702		catch(InterruptedException e) {
703	<	fail("unexpected exception");
703	>	threadUnexpectedException();
704		}
705		}
706		});
#	Line 445 | Line 718 | public class ReentrantLockTest extends T
718		assertFalse(t2.isAlive());
719		}
720		catch (Exception ex) {
721	<	fail("unexpected exception");
721	>	unexpectedException();
722		}
723		}
724
725	+	/**
726	+	* A serialized lock deserializes as unlocked
727	+	*/
728		public void testSerialization() {
729		ReentrantLock l = new ReentrantLock();
730		l.lock();
#	Line 467 | Line 743 | public class ReentrantLockTest extends T
743		r.unlock();
744		} catch(Exception e){
745		e.printStackTrace();
746	<	fail("unexpected exception");
746	>	unexpectedException();
747		}
748		}
749

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