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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.5 by dl, Fri Sep 26 15:33:13 2003 UTC vs.
Revision 1.25 by dl, Sun Jan 29 21:17:38 2006 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.io.*;
13	+	import java.util.*;
14
15		public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
#	Line 18 | Line 20 | public class ReentrantReadWriteLockTest
20		return new TestSuite(ReentrantReadWriteLockTest.class);
21		}
22
23	+	/**
24	+	* A runnable calling lockInterruptibly
25	+	*/
26	+	class InterruptibleLockRunnable implements Runnable {
27	+	final ReentrantReadWriteLock lock;
28	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
29	+	public void run() {
30	+	try {
31	+	lock.writeLock().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 ReentrantReadWriteLock lock;
43	+	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
44	+	public void run() {
45	+	try {
46	+	lock.writeLock().lockInterruptibly();
47	+	threadShouldThrow();
48	+	} catch(InterruptedException success){}
49	+	}
50	+	}
51	+
52	+	/**
53	+	* Subclass to expose protected methods
54	+	*/
55	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
56	+	PublicReentrantReadWriteLock() { 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	+	* Constructor sets given fairness, and is in unlocked state
67	+	*/
68	+	public void testConstructor() {
69	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
70	+	assertFalse(rl.isFair());
71	+	assertFalse(rl.isWriteLocked());
72	+	assertEquals(0, rl.getReadLockCount());
73	+	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	+	assertTrue(r2.isFair());
75	+	assertFalse(r2.isWriteLocked());
76	+	assertEquals(0, r2.getReadLockCount());
77	+	}
78
79		/**
80		* write-locking and read-locking an unlocked lock succeed
#	Line 25 | Line 82 | public class ReentrantReadWriteLockTest
82		public void testLock() {
83		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84		rl.writeLock().lock();
85	+	assertTrue(rl.isWriteLocked());
86	+	assertTrue(rl.isWriteLockedByCurrentThread());
87	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
88	+	assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90	+	assertFalse(rl.isWriteLocked());
91	+	assertFalse(rl.isWriteLockedByCurrentThread());
92	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
93	+	assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95	+	assertFalse(rl.isWriteLocked());
96	+	assertFalse(rl.isWriteLockedByCurrentThread());
97	+	assertEquals(1, rl.getReadLockCount());
98		rl.readLock().unlock();
99	+	assertFalse(rl.isWriteLocked());
100	+	assertFalse(rl.isWriteLockedByCurrentThread());
101	+	assertEquals(0, rl.getReadLockCount());
102		}
103
104
#	Line 37 | Line 108 | public class ReentrantReadWriteLockTest
108		public void testFairLock() {
109		ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
110		rl.writeLock().lock();
111	+	assertTrue(rl.isWriteLocked());
112	+	assertTrue(rl.isWriteLockedByCurrentThread());
113	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
114	+	assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116	+	assertFalse(rl.isWriteLocked());
117	+	assertFalse(rl.isWriteLockedByCurrentThread());
118	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
119	+	assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121	+	assertFalse(rl.isWriteLocked());
122	+	assertFalse(rl.isWriteLockedByCurrentThread());
123	+	assertEquals(1, rl.getReadLockCount());
124		rl.readLock().unlock();
125	+	assertFalse(rl.isWriteLocked());
126	+	assertFalse(rl.isWriteLockedByCurrentThread());
127	+	assertEquals(0, rl.getReadLockCount());
128	+	}
129	+
130	+	/**
131	+	* getWriteHoldCount returns number of recursive holds
132	+	*/
133	+	public void testGetWriteHoldCount() {
134	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135	+	for(int i = 1; i <= SIZE; i++) {
136	+	lock.writeLock().lock();
137	+	assertEquals(i,lock.getWriteHoldCount());
138	+	}
139	+	for(int i = SIZE; i > 0; i--) {
140	+	lock.writeLock().unlock();
141	+	assertEquals(i-1,lock.getWriteHoldCount());
142	+	}
143		}
144
145		/**
146	+	* WriteLock.getHoldCount returns number of recursive holds
147	+	*/
148	+	public void testGetHoldCount() {
149	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	+	for(int i = 1; i <= SIZE; i++) {
151	+	lock.writeLock().lock();
152	+	assertEquals(i,lock.writeLock().getHoldCount());
153	+	}
154	+	for(int i = SIZE; i > 0; i--) {
155	+	lock.writeLock().unlock();
156	+	assertEquals(i-1,lock.writeLock().getHoldCount());
157	+	}
158	+	}
159	+
160	+	/**
161	+	* getReadHoldCount returns number of recursive holds
162	+	*/
163	+	public void testGetReadHoldCount() {
164	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	+	for(int i = 1; i <= SIZE; i++) {
166	+	lock.readLock().lock();
167	+	assertEquals(i,lock.getReadHoldCount());
168	+	}
169	+	for(int i = SIZE; i > 0; i--) {
170	+	lock.readLock().unlock();
171	+	assertEquals(i-1,lock.getReadHoldCount());
172	+	}
173	+	}
174	+
175	+
176	+	/**
177		* write-unlocking an unlocked lock throws IllegalMonitorStateException
178		*/
179		public void testUnlock_IllegalMonitorStateException() {
#	Line 59 | Line 190 | public class ReentrantReadWriteLockTest
190		*/
191		public void testWriteLockInterruptibly_Interrupted() {
192		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
62	–	lock.writeLock().lock();
193		Thread t = new Thread(new Runnable() {
194		public void run() {
195		try {
196		lock.writeLock().lockInterruptibly();
197	<	threadShouldThrow();
197	>	lock.writeLock().unlock();
198	>	lock.writeLock().lockInterruptibly();
199	>	lock.writeLock().unlock();
200		} catch(InterruptedException success){}
201		}
202		});
203		try {
204	+	lock.writeLock().lock();
205		t.start();
206		t.interrupt();
207		lock.writeLock().unlock();
#	Line 79 | Line 212 | public class ReentrantReadWriteLockTest
212		}
213
214		/**
215	<	* timed write-trylock is interruptible
215	>	* timed write-tryLock is interruptible
216		*/
217		public void testWriteTryLock_Interrupted() {
218		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 88 | Line 221 | public class ReentrantReadWriteLockTest
221		public void run() {
222		try {
223		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
91	–	threadShouldThrow();
224		} catch(InterruptedException success){}
225		}
226		});
#	Line 112 | Line 244 | public class ReentrantReadWriteLockTest
244		public void run() {
245		try {
246		lock.readLock().lockInterruptibly();
115	–	threadShouldThrow();
247		} catch(InterruptedException success){}
248		}
249		});
#	Line 127 | Line 258 | public class ReentrantReadWriteLockTest
258		}
259
260		/**
261	<	* timed read-trylock is interruptible
261	>	* timed read-tryLock is interruptible
262		*/
263		public void testReadTryLock_Interrupted() {
264		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 151 | Line 282 | public class ReentrantReadWriteLockTest
282
283
284		/**
285	<	* write-trylock fails if locked
285	>	* write-tryLock fails if locked
286		*/
287		public void testWriteTryLockWhenLocked() {
288		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 171 | Line 302 | public class ReentrantReadWriteLockTest
302		}
303
304		/**
305	<	* read-trylock fails if locked
305	>	* read-tryLock fails if locked
306		*/
307		public void testReadTryLockWhenLocked() {
308		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 279 | Line 410 | public class ReentrantReadWriteLockTest
410		}
411		}
412
413	+	/**
414	+	* Read trylock succeeds if write locked by current thread
415	+	*/
416	+	public void testReadHoldingWriteLock() {
417	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
418	+	lock.writeLock().lock();
419	+	assertTrue(lock.readLock().tryLock());
420	+	lock.readLock().unlock();
421	+	lock.writeLock().unlock();
422	+	}
423
424		/**
425	<	* Read trylock succeeds if readlocked but not writelocked
425	>	* Read lock succeeds if write locked by current thread even if
426	>	* other threads are waiting for readlock
427	>	*/
428	>	public void testReadHoldingWriteLock2() {
429	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
430	>	lock.writeLock().lock();
431	>	Thread t1 = new Thread(new Runnable() {
432	>	public void run() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}
436	>	});
437	>	Thread t2 = new Thread(new Runnable() {
438	>	public void run() {
439	>	lock.readLock().lock();
440	>	lock.readLock().unlock();
441	>	}
442	>	});
443	>
444	>	try {
445	>	t1.start();
446	>	t2.start();
447	>	lock.readLock().lock();
448	>	lock.readLock().unlock();
449	>	Thread.sleep(SHORT_DELAY_MS);
450	>	lock.readLock().lock();
451	>	lock.readLock().unlock();
452	>	lock.writeLock().unlock();
453	>	t1.join(MEDIUM_DELAY_MS);
454	>	t2.join(MEDIUM_DELAY_MS);
455	>	assertTrue(!t1.isAlive());
456	>	assertTrue(!t2.isAlive());
457	>
458	>	} catch(Exception e){
459	>	unexpectedException();
460	>	}
461	>	}
462	>
463	>	/**
464	>	*  Read lock succeeds if write locked by current thread even if
465	>	* other threads are waiting for writelock
466	>	*/
467	>	public void testReadHoldingWriteLock3() {
468	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
469	>	lock.writeLock().lock();
470	>	Thread t1 = new Thread(new Runnable() {
471	>	public void run() {
472	>	lock.writeLock().lock();
473	>	lock.writeLock().unlock();
474	>	}
475	>	});
476	>	Thread t2 = new Thread(new Runnable() {
477	>	public void run() {
478	>	lock.writeLock().lock();
479	>	lock.writeLock().unlock();
480	>	}
481	>	});
482	>
483	>	try {
484	>	t1.start();
485	>	t2.start();
486	>	lock.readLock().lock();
487	>	lock.readLock().unlock();
488	>	Thread.sleep(SHORT_DELAY_MS);
489	>	lock.readLock().lock();
490	>	lock.readLock().unlock();
491	>	lock.writeLock().unlock();
492	>	t1.join(MEDIUM_DELAY_MS);
493	>	t2.join(MEDIUM_DELAY_MS);
494	>	assertTrue(!t1.isAlive());
495	>	assertTrue(!t2.isAlive());
496	>
497	>	} catch(Exception e){
498	>	unexpectedException();
499	>	}
500	>	}
501	>
502	>
503	>	/**
504	>	*  Write lock succeeds if write locked by current thread even if
505	>	* other threads are waiting for writelock
506	>	*/
507	>	public void testWriteHoldingWriteLock4() {
508	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
509	>	lock.writeLock().lock();
510	>	Thread t1 = new Thread(new Runnable() {
511	>	public void run() {
512	>	lock.writeLock().lock();
513	>	lock.writeLock().unlock();
514	>	}
515	>	});
516	>	Thread t2 = new Thread(new Runnable() {
517	>	public void run() {
518	>	lock.writeLock().lock();
519	>	lock.writeLock().unlock();
520	>	}
521	>	});
522	>
523	>	try {
524	>	t1.start();
525	>	t2.start();
526	>	lock.writeLock().lock();
527	>	lock.writeLock().unlock();
528	>	Thread.sleep(SHORT_DELAY_MS);
529	>	lock.writeLock().lock();
530	>	lock.writeLock().unlock();
531	>	lock.writeLock().unlock();
532	>	t1.join(MEDIUM_DELAY_MS);
533	>	t2.join(MEDIUM_DELAY_MS);
534	>	assertTrue(!t1.isAlive());
535	>	assertTrue(!t2.isAlive());
536	>
537	>	} catch(Exception e){
538	>	unexpectedException();
539	>	}
540	>	}
541	>
542	>
543	>	/**
544	>	* Fair Read trylock succeeds if write locked by current thread
545	>	*/
546	>	public void testReadHoldingWriteLockFair() {
547	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
548	>	lock.writeLock().lock();
549	>	assertTrue(lock.readLock().tryLock());
550	>	lock.readLock().unlock();
551	>	lock.writeLock().unlock();
552	>	}
553	>
554	>	/**
555	>	* Fair Read lock succeeds if write locked by current thread even if
556	>	* other threads are waiting for readlock
557	>	*/
558	>	public void testReadHoldingWriteLockFair2() {
559	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
560	>	lock.writeLock().lock();
561	>	Thread t1 = new Thread(new Runnable() {
562	>	public void run() {
563	>	lock.readLock().lock();
564	>	lock.readLock().unlock();
565	>	}
566	>	});
567	>	Thread t2 = new Thread(new Runnable() {
568	>	public void run() {
569	>	lock.readLock().lock();
570	>	lock.readLock().unlock();
571	>	}
572	>	});
573	>
574	>	try {
575	>	t1.start();
576	>	t2.start();
577	>	lock.readLock().lock();
578	>	lock.readLock().unlock();
579	>	Thread.sleep(SHORT_DELAY_MS);
580	>	lock.readLock().lock();
581	>	lock.readLock().unlock();
582	>	lock.writeLock().unlock();
583	>	t1.join(MEDIUM_DELAY_MS);
584	>	t2.join(MEDIUM_DELAY_MS);
585	>	assertTrue(!t1.isAlive());
586	>	assertTrue(!t2.isAlive());
587	>
588	>	} catch(Exception e){
589	>	unexpectedException();
590	>	}
591	>	}
592	>
593	>
594	>	/**
595	>	* Fair Read lock succeeds if write locked by current thread even if
596	>	* other threads are waiting for writelock
597	>	*/
598	>	public void testReadHoldingWriteLockFair3() {
599	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
600	>	lock.writeLock().lock();
601	>	Thread t1 = new Thread(new Runnable() {
602	>	public void run() {
603	>	lock.writeLock().lock();
604	>	lock.writeLock().unlock();
605	>	}
606	>	});
607	>	Thread t2 = new Thread(new Runnable() {
608	>	public void run() {
609	>	lock.writeLock().lock();
610	>	lock.writeLock().unlock();
611	>	}
612	>	});
613	>
614	>	try {
615	>	t1.start();
616	>	t2.start();
617	>	lock.readLock().lock();
618	>	lock.readLock().unlock();
619	>	Thread.sleep(SHORT_DELAY_MS);
620	>	lock.readLock().lock();
621	>	lock.readLock().unlock();
622	>	lock.writeLock().unlock();
623	>	t1.join(MEDIUM_DELAY_MS);
624	>	t2.join(MEDIUM_DELAY_MS);
625	>	assertTrue(!t1.isAlive());
626	>	assertTrue(!t2.isAlive());
627	>
628	>	} catch(Exception e){
629	>	unexpectedException();
630	>	}
631	>	}
632	>
633	>
634	>	/**
635	>	* Fair Write lock succeeds if write locked by current thread even if
636	>	* other threads are waiting for writelock
637	>	*/
638	>	public void testWriteHoldingWriteLockFair4() {
639	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
640	>	lock.writeLock().lock();
641	>	Thread t1 = new Thread(new Runnable() {
642	>	public void run() {
643	>	lock.writeLock().lock();
644	>	lock.writeLock().unlock();
645	>	}
646	>	});
647	>	Thread t2 = new Thread(new Runnable() {
648	>	public void run() {
649	>	lock.writeLock().lock();
650	>	lock.writeLock().unlock();
651	>	}
652	>	});
653	>
654	>	try {
655	>	t1.start();
656	>	t2.start();
657	>	Thread.sleep(SHORT_DELAY_MS);
658	>	assertTrue(lock.isWriteLockedByCurrentThread());
659	>	assertTrue(lock.getWriteHoldCount() == 1);
660	>	lock.writeLock().lock();
661	>	assertTrue(lock.getWriteHoldCount() == 2);
662	>	lock.writeLock().unlock();
663	>	lock.writeLock().lock();
664	>	lock.writeLock().unlock();
665	>	lock.writeLock().unlock();
666	>	t1.join(MEDIUM_DELAY_MS);
667	>	t2.join(MEDIUM_DELAY_MS);
668	>	assertTrue(!t1.isAlive());
669	>	assertTrue(!t2.isAlive());
670	>
671	>	} catch(Exception e){
672	>	unexpectedException();
673	>	}
674	>	}
675	>
676	>
677	>	/**
678	>	* Read tryLock succeeds if readlocked but not writelocked
679		*/
680		public void testTryLockWhenReadLocked() {
681		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 304 | Line 698 | public class ReentrantReadWriteLockTest
698
699
700		/**
701	<	* write trylock fails when readlocked
701	>	* write tryLock fails when readlocked
702		*/
703		public void testWriteTryLockWhenReadLocked() {
704		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 323 | Line 717 | public class ReentrantReadWriteLockTest
717		}
718		}
719
720	+
721	+	/**
722	+	* Fair Read tryLock succeeds if readlocked but not writelocked
723	+	*/
724	+	public void testTryLockWhenReadLockedFair() {
725	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
726	+	lock.readLock().lock();
727	+	Thread t = new Thread(new Runnable() {
728	+	public void run() {
729	+	threadAssertTrue(lock.readLock().tryLock());
730	+	lock.readLock().unlock();
731	+	}
732	+	});
733	+	try {
734	+	t.start();
735	+	t.join();
736	+	lock.readLock().unlock();
737	+	} catch(Exception e){
738	+	unexpectedException();
739	+	}
740	+	}
741	+
742
743
744		/**
745	<	* write timed trylock times out if locked
745	>	* Fair write tryLock fails when readlocked
746	>	*/
747	>	public void testWriteTryLockWhenReadLockedFair() {
748	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
749	>	lock.readLock().lock();
750	>	Thread t = new Thread(new Runnable() {
751	>	public void run() {
752	>	threadAssertFalse(lock.writeLock().tryLock());
753	>	}
754	>	});
755	>	try {
756	>	t.start();
757	>	t.join();
758	>	lock.readLock().unlock();
759	>	} catch(Exception e){
760	>	unexpectedException();
761	>	}
762	>	}
763	>
764	>
765	>
766	>	/**
767	>	* write timed tryLock times out if locked
768		*/
769		public void testWriteTryLock_Timeout() {
770		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 350 | Line 788 | public class ReentrantReadWriteLockTest
788		}
789
790		/**
791	<	* read timed trylock times out if write-locked
791	>	* read timed tryLock times out if write-locked
792		*/
793		public void testReadTryLock_Timeout() {
794		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 494 | Line 932 | public class ReentrantReadWriteLockTest
932		final Condition c = lock.writeLock().newCondition();
933		try {
934		lock.writeLock().lock();
497	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
935		lock.writeLock().unlock();
936		}
937		catch (Exception ex) {
#	Line 511 | Line 948 | public class ReentrantReadWriteLockTest
948		try {
949		lock.writeLock().lock();
950		java.util.Date d = new java.util.Date();
514	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
951		lock.writeLock().unlock();
952		}
953		catch (Exception ex) {
#	Line 552 | Line 988 | public class ReentrantReadWriteLockTest
988		}
989		}
990
991	+	/** A helper class for uninterruptible wait tests */
992	+	class UninterruptableThread extends Thread {
993	+	private Lock lock;
994	+	private Condition c;
995	+
996	+	public volatile boolean canAwake = false;
997	+	public volatile boolean interrupted = false;
998	+	public volatile boolean lockStarted = false;
999	+
1000	+	public UninterruptableThread(Lock lock, Condition c) {
1001	+	this.lock = lock;
1002	+	this.c = c;
1003	+	}
1004	+
1005	+	public synchronized void run() {
1006	+	lock.lock();
1007	+	lockStarted = true;
1008	+
1009	+	while (!canAwake) {
1010	+	c.awaitUninterruptibly();
1011	+	}
1012	+
1013	+	interrupted = isInterrupted();
1014	+	lock.unlock();
1015	+	}
1016	+	}
1017	+
1018		/**
1019		* awaitUninterruptibly doesn't abort on interrupt
1020		*/
1021		public void testAwaitUninterruptibly() {
1022	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1022	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1023		final Condition c = lock.writeLock().newCondition();
1024	<	Thread t = new Thread(new Runnable() {
562	<	public void run() {
563	<	lock.writeLock().lock();
564	<	c.awaitUninterruptibly();
565	<	lock.writeLock().unlock();
566	<	}
567	<	});
1024	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1025
1026		try {
1027	<	t.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	t.interrupt();
1027	>	thread.start();
1028	>
1029	>	while (!thread.lockStarted) {
1030	>	Thread.sleep(100);
1031	>	}
1032	>
1033		lock.writeLock().lock();
1034	<	c.signal();
1035	<	lock.writeLock().unlock();
1036	<	assert(t.isInterrupted());
1037	<	t.join(SHORT_DELAY_MS);
1038	<	assertFalse(t.isAlive());
1039	<	}
1040	<	catch (Exception ex) {
1034	>	try {
1035	>	thread.interrupt();
1036	>	thread.canAwake = true;
1037	>	c.signal();
1038	>	} finally {
1039	>	lock.writeLock().unlock();
1040	>	}
1041	>
1042	>	thread.join();
1043	>	assertTrue(thread.interrupted);
1044	>	assertFalse(thread.isAlive());
1045	>	} catch (Exception ex) {
1046		unexpectedException();
1047		}
1048		}
#	Line 750 | Line 1215 | public class ReentrantReadWriteLockTest
1215		}
1216		}
1217
1218	+	/**
1219	+	* hasQueuedThreads reports whether there are waiting threads
1220	+	*/
1221	+	public void testhasQueuedThreads() {
1222	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1223	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1224	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1225	+	try {
1226	+	assertFalse(lock.hasQueuedThreads());
1227	+	lock.writeLock().lock();
1228	+	t1.start();
1229	+	Thread.sleep(SHORT_DELAY_MS);
1230	+	assertTrue(lock.hasQueuedThreads());
1231	+	t2.start();
1232	+	Thread.sleep(SHORT_DELAY_MS);
1233	+	assertTrue(lock.hasQueuedThreads());
1234	+	t1.interrupt();
1235	+	Thread.sleep(SHORT_DELAY_MS);
1236	+	assertTrue(lock.hasQueuedThreads());
1237	+	lock.writeLock().unlock();
1238	+	Thread.sleep(SHORT_DELAY_MS);
1239	+	assertFalse(lock.hasQueuedThreads());
1240	+	t1.join();
1241	+	t2.join();
1242	+	} catch(Exception e){
1243	+	unexpectedException();
1244	+	}
1245	+	}
1246	+
1247	+	/**
1248	+	* hasQueuedThread(null) throws NPE
1249	+	*/
1250	+	public void testHasQueuedThreadNPE() {
1251	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1252	+	try {
1253	+	sync.hasQueuedThread(null);
1254	+	shouldThrow();
1255	+	} catch (NullPointerException success) {
1256	+	}
1257	+	}
1258	+
1259	+	/**
1260	+	* hasQueuedThread reports whether a thread is queued.
1261	+	*/
1262	+	public void testHasQueuedThread() {
1263	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1264	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1265	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1266	+	try {
1267	+	assertFalse(sync.hasQueuedThread(t1));
1268	+	assertFalse(sync.hasQueuedThread(t2));
1269	+	sync.writeLock().lock();
1270	+	t1.start();
1271	+	Thread.sleep(SHORT_DELAY_MS);
1272	+	assertTrue(sync.hasQueuedThread(t1));
1273	+	t2.start();
1274	+	Thread.sleep(SHORT_DELAY_MS);
1275	+	assertTrue(sync.hasQueuedThread(t1));
1276	+	assertTrue(sync.hasQueuedThread(t2));
1277	+	t1.interrupt();
1278	+	Thread.sleep(SHORT_DELAY_MS);
1279	+	assertFalse(sync.hasQueuedThread(t1));
1280	+	assertTrue(sync.hasQueuedThread(t2));
1281	+	sync.writeLock().unlock();
1282	+	Thread.sleep(SHORT_DELAY_MS);
1283	+	assertFalse(sync.hasQueuedThread(t1));
1284	+	Thread.sleep(SHORT_DELAY_MS);
1285	+	assertFalse(sync.hasQueuedThread(t2));
1286	+	t1.join();
1287	+	t2.join();
1288	+	} catch(Exception e){
1289	+	unexpectedException();
1290	+	}
1291	+	}
1292	+
1293	+
1294	+	/**
1295	+	* getQueueLength reports number of waiting threads
1296	+	*/
1297	+	public void testGetQueueLength() {
1298	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1299	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1300	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1301	+	try {
1302	+	assertEquals(0, lock.getQueueLength());
1303	+	lock.writeLock().lock();
1304	+	t1.start();
1305	+	Thread.sleep(SHORT_DELAY_MS);
1306	+	assertEquals(1, lock.getQueueLength());
1307	+	t2.start();
1308	+	Thread.sleep(SHORT_DELAY_MS);
1309	+	assertEquals(2, lock.getQueueLength());
1310	+	t1.interrupt();
1311	+	Thread.sleep(SHORT_DELAY_MS);
1312	+	assertEquals(1, lock.getQueueLength());
1313	+	lock.writeLock().unlock();
1314	+	Thread.sleep(SHORT_DELAY_MS);
1315	+	assertEquals(0, lock.getQueueLength());
1316	+	t1.join();
1317	+	t2.join();
1318	+	} catch(Exception e){
1319	+	unexpectedException();
1320	+	}
1321	+	}
1322	+
1323	+	/**
1324	+	* getQueuedThreads includes waiting threads
1325	+	*/
1326	+	public void testGetQueuedThreads() {
1327	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1328	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1329	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1330	+	try {
1331	+	assertTrue(lock.getQueuedThreads().isEmpty());
1332	+	lock.writeLock().lock();
1333	+	assertTrue(lock.getQueuedThreads().isEmpty());
1334	+	t1.start();
1335	+	Thread.sleep(SHORT_DELAY_MS);
1336	+	assertTrue(lock.getQueuedThreads().contains(t1));
1337	+	t2.start();
1338	+	Thread.sleep(SHORT_DELAY_MS);
1339	+	assertTrue(lock.getQueuedThreads().contains(t1));
1340	+	assertTrue(lock.getQueuedThreads().contains(t2));
1341	+	t1.interrupt();
1342	+	Thread.sleep(SHORT_DELAY_MS);
1343	+	assertFalse(lock.getQueuedThreads().contains(t1));
1344	+	assertTrue(lock.getQueuedThreads().contains(t2));
1345	+	lock.writeLock().unlock();
1346	+	Thread.sleep(SHORT_DELAY_MS);
1347	+	assertTrue(lock.getQueuedThreads().isEmpty());
1348	+	t1.join();
1349	+	t2.join();
1350	+	} catch(Exception e){
1351	+	unexpectedException();
1352	+	}
1353	+	}
1354	+
1355	+	/**
1356	+	* hasWaiters throws NPE if null
1357	+	*/
1358	+	public void testHasWaitersNPE() {
1359	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1360	+	try {
1361	+	lock.hasWaiters(null);
1362	+	shouldThrow();
1363	+	} catch (NullPointerException success) {
1364	+	} catch (Exception ex) {
1365	+	unexpectedException();
1366	+	}
1367	+	}
1368	+
1369	+	/**
1370	+	* getWaitQueueLength throws NPE if null
1371	+	*/
1372	+	public void testGetWaitQueueLengthNPE() {
1373	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1374	+	try {
1375	+	lock.getWaitQueueLength(null);
1376	+	shouldThrow();
1377	+	} catch (NullPointerException success) {
1378	+	} catch (Exception ex) {
1379	+	unexpectedException();
1380	+	}
1381	+	}
1382	+
1383	+
1384	+	/**
1385	+	* getWaitingThreads throws NPE if null
1386	+	*/
1387	+	public void testGetWaitingThreadsNPE() {
1388	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1389	+	try {
1390	+	lock.getWaitingThreads(null);
1391	+	shouldThrow();
1392	+	} catch (NullPointerException success) {
1393	+	} catch (Exception ex) {
1394	+	unexpectedException();
1395	+	}
1396	+	}
1397	+
1398	+	/**
1399	+	* hasWaiters throws IAE if not owned
1400	+	*/
1401	+	public void testHasWaitersIAE() {
1402	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1403	+	final Condition c = (lock.writeLock().newCondition());
1404	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1405	+	try {
1406	+	lock2.hasWaiters(c);
1407	+	shouldThrow();
1408	+	} catch (IllegalArgumentException success) {
1409	+	} catch (Exception ex) {
1410	+	unexpectedException();
1411	+	}
1412	+	}
1413	+
1414	+	/**
1415	+	* hasWaiters throws IMSE if not locked
1416	+	*/
1417	+	public void testHasWaitersIMSE() {
1418	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1419	+	final Condition c = (lock.writeLock().newCondition());
1420	+	try {
1421	+	lock.hasWaiters(c);
1422	+	shouldThrow();
1423	+	} catch (IllegalMonitorStateException success) {
1424	+	} catch (Exception ex) {
1425	+	unexpectedException();
1426	+	}
1427	+	}
1428	+
1429	+
1430	+	/**
1431	+	* getWaitQueueLength throws IAE if not owned
1432	+	*/
1433	+	public void testGetWaitQueueLengthIAE() {
1434	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1435	+	final Condition c = (lock.writeLock().newCondition());
1436	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1437	+	try {
1438	+	lock2.getWaitQueueLength(c);
1439	+	shouldThrow();
1440	+	} catch (IllegalArgumentException success) {
1441	+	} catch (Exception ex) {
1442	+	unexpectedException();
1443	+	}
1444	+	}
1445	+
1446	+	/**
1447	+	* getWaitQueueLength throws IMSE if not locked
1448	+	*/
1449	+	public void testGetWaitQueueLengthIMSE() {
1450	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1451	+	final Condition c = (lock.writeLock().newCondition());
1452	+	try {
1453	+	lock.getWaitQueueLength(c);
1454	+	shouldThrow();
1455	+	} catch (IllegalMonitorStateException success) {
1456	+	} catch (Exception ex) {
1457	+	unexpectedException();
1458	+	}
1459	+	}
1460	+
1461	+
1462	+	/**
1463	+	* getWaitingThreads throws IAE if not owned
1464	+	*/
1465	+	public void testGetWaitingThreadsIAE() {
1466	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1467	+	final Condition c = (lock.writeLock().newCondition());
1468	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1469	+	try {
1470	+	lock2.getWaitingThreads(c);
1471	+	shouldThrow();
1472	+	} catch (IllegalArgumentException success) {
1473	+	} catch (Exception ex) {
1474	+	unexpectedException();
1475	+	}
1476	+	}
1477	+
1478	+	/**
1479	+	* getWaitingThreads throws IMSE if not locked
1480	+	*/
1481	+	public void testGetWaitingThreadsIMSE() {
1482	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1483	+	final Condition c = (lock.writeLock().newCondition());
1484	+	try {
1485	+	lock.getWaitingThreads(c);
1486	+	shouldThrow();
1487	+	} catch (IllegalMonitorStateException success) {
1488	+	} catch (Exception ex) {
1489	+	unexpectedException();
1490	+	}
1491	+	}
1492	+
1493	+
1494	+	/**
1495	+	* hasWaiters returns true when a thread is waiting, else false
1496	+	*/
1497	+	public void testHasWaiters() {
1498	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1499	+	final Condition c = (lock.writeLock().newCondition());
1500	+	Thread t = new Thread(new Runnable() {
1501	+	public void run() {
1502	+	try {
1503	+	lock.writeLock().lock();
1504	+	threadAssertFalse(lock.hasWaiters(c));
1505	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1506	+	c.await();
1507	+	lock.writeLock().unlock();
1508	+	}
1509	+	catch(InterruptedException e) {
1510	+	threadUnexpectedException();
1511	+	}
1512	+	}
1513	+	});
1514	+
1515	+	try {
1516	+	t.start();
1517	+	Thread.sleep(SHORT_DELAY_MS);
1518	+	lock.writeLock().lock();
1519	+	assertTrue(lock.hasWaiters(c));
1520	+	assertEquals(1, lock.getWaitQueueLength(c));
1521	+	c.signal();
1522	+	lock.writeLock().unlock();
1523	+	Thread.sleep(SHORT_DELAY_MS);
1524	+	lock.writeLock().lock();
1525	+	assertFalse(lock.hasWaiters(c));
1526	+	assertEquals(0, lock.getWaitQueueLength(c));
1527	+	lock.writeLock().unlock();
1528	+	t.join(SHORT_DELAY_MS);
1529	+	assertFalse(t.isAlive());
1530	+	}
1531	+	catch (Exception ex) {
1532	+	unexpectedException();
1533	+	}
1534	+	}
1535	+
1536	+	/**
1537	+	* getWaitQueueLength returns number of waiting threads
1538	+	*/
1539	+	public void testGetWaitQueueLength() {
1540	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1541	+	final Condition c = (lock.writeLock().newCondition());
1542	+	Thread t = new Thread(new Runnable() {
1543	+	public void run() {
1544	+	try {
1545	+	lock.writeLock().lock();
1546	+	threadAssertFalse(lock.hasWaiters(c));
1547	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1548	+	c.await();
1549	+	lock.writeLock().unlock();
1550	+	}
1551	+	catch(InterruptedException e) {
1552	+	threadUnexpectedException();
1553	+	}
1554	+	}
1555	+	});
1556	+
1557	+	try {
1558	+	t.start();
1559	+	Thread.sleep(SHORT_DELAY_MS);
1560	+	lock.writeLock().lock();
1561	+	assertTrue(lock.hasWaiters(c));
1562	+	assertEquals(1, lock.getWaitQueueLength(c));
1563	+	c.signal();
1564	+	lock.writeLock().unlock();
1565	+	Thread.sleep(SHORT_DELAY_MS);
1566	+	lock.writeLock().lock();
1567	+	assertFalse(lock.hasWaiters(c));
1568	+	assertEquals(0, lock.getWaitQueueLength(c));
1569	+	lock.writeLock().unlock();
1570	+	t.join(SHORT_DELAY_MS);
1571	+	assertFalse(t.isAlive());
1572	+	}
1573	+	catch (Exception ex) {
1574	+	unexpectedException();
1575	+	}
1576	+	}
1577	+
1578	+
1579	+	/**
1580	+	* getWaitingThreads returns only and all waiting threads
1581	+	*/
1582	+	public void testGetWaitingThreads() {
1583	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1584	+	final Condition c = lock.writeLock().newCondition();
1585	+	Thread t1 = new Thread(new Runnable() {
1586	+	public void run() {
1587	+	try {
1588	+	lock.writeLock().lock();
1589	+	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1590	+	c.await();
1591	+	lock.writeLock().unlock();
1592	+	}
1593	+	catch(InterruptedException e) {
1594	+	threadUnexpectedException();
1595	+	}
1596	+	}
1597	+	});
1598	+
1599	+	Thread t2 = new Thread(new Runnable() {
1600	+	public void run() {
1601	+	try {
1602	+	lock.writeLock().lock();
1603	+	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1604	+	c.await();
1605	+	lock.writeLock().unlock();
1606	+	}
1607	+	catch(InterruptedException e) {
1608	+	threadUnexpectedException();
1609	+	}
1610	+	}
1611	+	});
1612	+
1613	+	try {
1614	+	lock.writeLock().lock();
1615	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1616	+	lock.writeLock().unlock();
1617	+	t1.start();
1618	+	Thread.sleep(SHORT_DELAY_MS);
1619	+	t2.start();
1620	+	Thread.sleep(SHORT_DELAY_MS);
1621	+	lock.writeLock().lock();
1622	+	assertTrue(lock.hasWaiters(c));
1623	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1624	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1625	+	c.signalAll();
1626	+	lock.writeLock().unlock();
1627	+	Thread.sleep(SHORT_DELAY_MS);
1628	+	lock.writeLock().lock();
1629	+	assertFalse(lock.hasWaiters(c));
1630	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1631	+	lock.writeLock().unlock();
1632	+	t1.join(SHORT_DELAY_MS);
1633	+	t2.join(SHORT_DELAY_MS);
1634	+	assertFalse(t1.isAlive());
1635	+	assertFalse(t2.isAlive());
1636	+	}
1637	+	catch (Exception ex) {
1638	+	unexpectedException();
1639	+	}
1640	+	}
1641	+
1642	+	/**
1643	+	* toString indicates current lock state
1644	+	*/
1645	+	public void testToString() {
1646	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1647	+	String us = lock.toString();
1648	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1649	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1650	+	lock.writeLock().lock();
1651	+	String ws = lock.toString();
1652	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1653	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1654	+	lock.writeLock().unlock();
1655	+	lock.readLock().lock();
1656	+	lock.readLock().lock();
1657	+	String rs = lock.toString();
1658	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1659	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1660	+	}
1661	+
1662	+	/**
1663	+	* readLock.toString indicates current lock state
1664	+	*/
1665	+	public void testReadLockToString() {
1666	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1667	+	String us = lock.readLock().toString();
1668	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1669	+	lock.readLock().lock();
1670	+	lock.readLock().lock();
1671	+	String rs = lock.readLock().toString();
1672	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1673	+	}
1674	+
1675	+	/**
1676	+	* writeLock.toString indicates current lock state
1677	+	*/
1678	+	public void testWriteLockToString() {
1679	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1680	+	String us = lock.writeLock().toString();
1681	+	assertTrue(us.indexOf("Unlocked") >= 0);
1682	+	lock.writeLock().lock();
1683	+	String ls = lock.writeLock().toString();
1684	+	assertTrue(ls.indexOf("Locked") >= 0);
1685	+	}
1686
1687		}

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