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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.18 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.25 by dl, Sun Jan 29 21:17:38 2006 UTC

#	Line 84 | Line 84 | public class ReentrantReadWriteLockTest
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());
#	Line 108 | Line 110 | public class ReentrantReadWriteLockTest
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());
#	Line 126 | Line 130 | public class ReentrantReadWriteLockTest
130		/**
131		* getWriteHoldCount returns number of recursive holds
132		*/
133	<	public void testGetHoldCount() {
133	>	public void testGetWriteHoldCount() {
134		ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135		for(int i = 1; i <= SIZE; i++) {
136		lock.writeLock().lock();
#	Line 137 | Line 141 | public class ReentrantReadWriteLockTest
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		/**
#	Line 376 | 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 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
#	Line 420 | 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	+	* 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		/**
#	Line 591 | Line 932 | public class ReentrantReadWriteLockTest
932		final Condition c = lock.writeLock().newCondition();
933		try {
934		lock.writeLock().lock();
594	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
935		lock.writeLock().unlock();
936		}
937		catch (Exception ex) {
#	Line 608 | Line 948 | public class ReentrantReadWriteLockTest
948		try {
949		lock.writeLock().lock();
950		java.util.Date d = new java.util.Date();
611	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
951		lock.writeLock().unlock();
952		}
953		catch (Exception ex) {
#	Line 649 | 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() {
659	<	public void run() {
660	<	lock.writeLock().lock();
661	<	c.awaitUninterruptibly();
662	<	lock.writeLock().unlock();
663	<	}
664	<	});
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 877 | Line 1245 | public class ReentrantReadWriteLockTest
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() {

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