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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.28 by jsr166, Mon Nov 2 20:28:31 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12		import java.io.*;
13	+	import java.util.*;
14
15		public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
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	<	/*
79	>	/**
80		* write-locking and read-locking an unlocked lock succeed
81		*/
82	<	public void testLock() {
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
105	<	/*
105	>	/**
106		* locking an unlocked fair lock succeeds
107		*/
108	<	public void testFairLock() {
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() {
179	>	public void testUnlock_IllegalMonitorStateException() {
180		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181		try {
182		rl.writeLock().unlock();
#	Line 57 | Line 188 | public class ReentrantReadWriteLockTest
188		/**
189		* write-lockInterruptibly is interruptible
190		*/
191	<	public void testWriteLockInterruptibly_Interrupted() {
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	+	Thread.sleep(SHORT_DELAY_MS);
207		t.interrupt();
208	+	Thread.sleep(SHORT_DELAY_MS);
209		lock.writeLock().unlock();
210		t.join();
211		} catch(Exception e){
212		unexpectedException();
213		}
214	<	}
214	>	}
215
216		/**
217	<	* timed write-trylock is interruptible
217	>	* timed write-tryLock is interruptible
218		*/
219	<	public void testWriteTryLock_Interrupted() {
219	>	public void testWriteTryLock_Interrupted() {
220		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
221		lock.writeLock().lock();
222		Thread t = new Thread(new Runnable() {
223		public void run() {
224		try {
225		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
91	–	threadShouldThrow();
226		} catch(InterruptedException success){}
227		}
228		});
#	Line 105 | Line 239 | public class ReentrantReadWriteLockTest
239		/**
240		* read-lockInterruptibly is interruptible
241		*/
242	<	public void testReadLockInterruptibly_Interrupted() {
242	>	public void testReadLockInterruptibly_Interrupted() {
243		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
244		lock.writeLock().lock();
245		Thread t = new Thread(new Runnable() {
246		public void run() {
247		try {
248		lock.readLock().lockInterruptibly();
115	–	threadShouldThrow();
249		} catch(InterruptedException success){}
250		}
251		});
252		try {
253		t.start();
254	+	Thread.sleep(SHORT_DELAY_MS);
255		t.interrupt();
256	+	Thread.sleep(SHORT_DELAY_MS);
257		lock.writeLock().unlock();
258		t.join();
259		} catch(Exception e){
260		unexpectedException();
261		}
262	<	}
262	>	}
263
264		/**
265	<	* timed read-trylock is interruptible
265	>	* timed read-tryLock is interruptible
266		*/
267	<	public void testReadTryLock_Interrupted() {
267	>	public void testReadTryLock_Interrupted() {
268		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
269		lock.writeLock().lock();
270		Thread t = new Thread(new Runnable() {
#	Line 149 | Line 284 | public class ReentrantReadWriteLockTest
284		}
285		}
286
287	<
287	>
288		/**
289	<	* write-trylock fails if locked
289	>	* write-tryLock fails if locked
290		*/
291	<	public void testWriteTryLockWhenLocked() {
291	>	public void testWriteTryLockWhenLocked() {
292		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
293		lock.writeLock().lock();
294		Thread t = new Thread(new Runnable() {
#	Line 168 | Line 303 | public class ReentrantReadWriteLockTest
303		} catch(Exception e){
304		unexpectedException();
305		}
306	<	}
306	>	}
307
308		/**
309	<	* read-trylock fails if locked
309	>	* read-tryLock fails if locked
310		*/
311	<	public void testReadTryLockWhenLocked() {
311	>	public void testReadTryLockWhenLocked() {
312		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
313		lock.writeLock().lock();
314		Thread t = new Thread(new Runnable() {
#	Line 188 | Line 323 | public class ReentrantReadWriteLockTest
323		} catch(Exception e){
324		unexpectedException();
325		}
326	<	}
326	>	}
327
328		/**
329		* Multiple threads can hold a read lock when not write-locked
330		*/
331	<	public void testMultipleReadLocks() {
331	>	public void testMultipleReadLocks() {
332		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
333		lock.readLock().lock();
334		Thread t = new Thread(new Runnable() {
#	Line 209 | Line 344 | public class ReentrantReadWriteLockTest
344		} catch(Exception e){
345		unexpectedException();
346		}
347	<	}
347	>	}
348
349		/**
350		* A writelock succeeds after reading threads unlock
351		*/
352	<	public void testWriteAfterMultipleReadLocks() {
352	>	public void testWriteAfterMultipleReadLocks() {
353		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
354		lock.readLock().lock();
355		Thread t1 = new Thread(new Runnable() {
#	Line 239 | Line 374 | public class ReentrantReadWriteLockTest
374		t2.join(MEDIUM_DELAY_MS);
375		assertTrue(!t1.isAlive());
376		assertTrue(!t2.isAlive());
377	<
377	>
378		} catch(Exception e){
379		unexpectedException();
380		}
381	<	}
381	>	}
382
383		/**
384		* Readlocks succeed after a writing thread unlocks
385		*/
386	<	public void testReadAfterWriteLock() {
386	>	public void testReadAfterWriteLock() {
387		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
388		lock.writeLock().lock();
389		Thread t1 = new Thread(new Runnable() {
#	Line 273 | Line 408 | public class ReentrantReadWriteLockTest
408		t2.join(MEDIUM_DELAY_MS);
409		assertTrue(!t1.isAlive());
410		assertTrue(!t2.isAlive());
411	<
411	>
412	>	} catch(Exception e){
413	>	unexpectedException();
414	>	}
415	>	}
416	>
417	>	/**
418	>	* Read trylock succeeds if write locked by current thread
419	>	*/
420	>	public void testReadHoldingWriteLock() {
421	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
422	>	lock.writeLock().lock();
423	>	assertTrue(lock.readLock().tryLock());
424	>	lock.readLock().unlock();
425	>	lock.writeLock().unlock();
426	>	}
427	>
428	>	/**
429	>	* Read lock succeeds if write locked by current thread even if
430	>	* other threads are waiting for readlock
431	>	*/
432	>	public void testReadHoldingWriteLock2() {
433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
434	>	lock.writeLock().lock();
435	>	Thread t1 = new Thread(new Runnable() {
436	>	public void run() {
437	>	lock.readLock().lock();
438	>	lock.readLock().unlock();
439	>	}
440	>	});
441	>	Thread t2 = new Thread(new Runnable() {
442	>	public void run() {
443	>	lock.readLock().lock();
444	>	lock.readLock().unlock();
445	>	}
446	>	});
447	>
448	>	try {
449	>	t1.start();
450	>	t2.start();
451	>	lock.readLock().lock();
452	>	lock.readLock().unlock();
453	>	Thread.sleep(SHORT_DELAY_MS);
454	>	lock.readLock().lock();
455	>	lock.readLock().unlock();
456	>	lock.writeLock().unlock();
457	>	t1.join(MEDIUM_DELAY_MS);
458	>	t2.join(MEDIUM_DELAY_MS);
459	>	assertTrue(!t1.isAlive());
460	>	assertTrue(!t2.isAlive());
461	>
462	>	} catch(Exception e){
463	>	unexpectedException();
464	>	}
465	>	}
466	>
467	>	/**
468	>	*  Read lock succeeds if write locked by current thread even if
469	>	* other threads are waiting for writelock
470	>	*/
471	>	public void testReadHoldingWriteLock3() {
472	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
473	>	lock.writeLock().lock();
474	>	Thread t1 = new Thread(new Runnable() {
475	>	public void run() {
476	>	lock.writeLock().lock();
477	>	lock.writeLock().unlock();
478	>	}
479	>	});
480	>	Thread t2 = new Thread(new Runnable() {
481	>	public void run() {
482	>	lock.writeLock().lock();
483	>	lock.writeLock().unlock();
484	>	}
485	>	});
486	>
487	>	try {
488	>	t1.start();
489	>	t2.start();
490	>	lock.readLock().lock();
491	>	lock.readLock().unlock();
492	>	Thread.sleep(SHORT_DELAY_MS);
493	>	lock.readLock().lock();
494	>	lock.readLock().unlock();
495	>	lock.writeLock().unlock();
496	>	t1.join(MEDIUM_DELAY_MS);
497	>	t2.join(MEDIUM_DELAY_MS);
498	>	assertTrue(!t1.isAlive());
499	>	assertTrue(!t2.isAlive());
500	>
501	>	} catch(Exception e){
502	>	unexpectedException();
503	>	}
504	>	}
505	>
506	>
507	>	/**
508	>	*  Write lock succeeds if write locked by current thread even if
509	>	* other threads are waiting for writelock
510	>	*/
511	>	public void testWriteHoldingWriteLock4() {
512	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
513	>	lock.writeLock().lock();
514	>	Thread t1 = new Thread(new Runnable() {
515	>	public void run() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}
519	>	});
520	>	Thread t2 = new Thread(new Runnable() {
521	>	public void run() {
522	>	lock.writeLock().lock();
523	>	lock.writeLock().unlock();
524	>	}
525	>	});
526	>
527	>	try {
528	>	t1.start();
529	>	t2.start();
530	>	lock.writeLock().lock();
531	>	lock.writeLock().unlock();
532	>	Thread.sleep(SHORT_DELAY_MS);
533	>	lock.writeLock().lock();
534	>	lock.writeLock().unlock();
535	>	lock.writeLock().unlock();
536	>	t1.join(MEDIUM_DELAY_MS);
537	>	t2.join(MEDIUM_DELAY_MS);
538	>	assertTrue(!t1.isAlive());
539	>	assertTrue(!t2.isAlive());
540	>
541	>	} catch(Exception e){
542	>	unexpectedException();
543	>	}
544	>	}
545	>
546	>
547	>	/**
548	>	* Fair Read trylock succeeds if write locked by current thread
549	>	*/
550	>	public void testReadHoldingWriteLockFair() {
551	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
552	>	lock.writeLock().lock();
553	>	assertTrue(lock.readLock().tryLock());
554	>	lock.readLock().unlock();
555	>	lock.writeLock().unlock();
556	>	}
557	>
558	>	/**
559	>	* Fair Read lock succeeds if write locked by current thread even if
560	>	* other threads are waiting for readlock
561	>	*/
562	>	public void testReadHoldingWriteLockFair2() {
563	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
564	>	lock.writeLock().lock();
565	>	Thread t1 = new Thread(new Runnable() {
566	>	public void run() {
567	>	lock.readLock().lock();
568	>	lock.readLock().unlock();
569	>	}
570	>	});
571	>	Thread t2 = new Thread(new Runnable() {
572	>	public void run() {
573	>	lock.readLock().lock();
574	>	lock.readLock().unlock();
575	>	}
576	>	});
577	>
578	>	try {
579	>	t1.start();
580	>	t2.start();
581	>	lock.readLock().lock();
582	>	lock.readLock().unlock();
583	>	Thread.sleep(SHORT_DELAY_MS);
584	>	lock.readLock().lock();
585	>	lock.readLock().unlock();
586	>	lock.writeLock().unlock();
587	>	t1.join(MEDIUM_DELAY_MS);
588	>	t2.join(MEDIUM_DELAY_MS);
589	>	assertTrue(!t1.isAlive());
590	>	assertTrue(!t2.isAlive());
591	>
592	>	} catch(Exception e){
593	>	unexpectedException();
594	>	}
595	>	}
596	>
597	>
598	>	/**
599	>	* Fair Read lock succeeds if write locked by current thread even if
600	>	* other threads are waiting for writelock
601	>	*/
602	>	public void testReadHoldingWriteLockFair3() {
603	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
604	>	lock.writeLock().lock();
605	>	Thread t1 = new Thread(new Runnable() {
606	>	public void run() {
607	>	lock.writeLock().lock();
608	>	lock.writeLock().unlock();
609	>	}
610	>	});
611	>	Thread t2 = new Thread(new Runnable() {
612	>	public void run() {
613	>	lock.writeLock().lock();
614	>	lock.writeLock().unlock();
615	>	}
616	>	});
617	>
618	>	try {
619	>	t1.start();
620	>	t2.start();
621	>	lock.readLock().lock();
622	>	lock.readLock().unlock();
623	>	Thread.sleep(SHORT_DELAY_MS);
624	>	lock.readLock().lock();
625	>	lock.readLock().unlock();
626	>	lock.writeLock().unlock();
627	>	t1.join(MEDIUM_DELAY_MS);
628	>	t2.join(MEDIUM_DELAY_MS);
629	>	assertTrue(!t1.isAlive());
630	>	assertTrue(!t2.isAlive());
631	>
632		} catch(Exception e){
633		unexpectedException();
634		}
635	<	}
635	>	}
636
637
638		/**
639	<	* Read trylock succeeds if readlocked but not writelocked
639	>	* Fair Write lock succeeds if write locked by current thread even if
640	>	* other threads are waiting for writelock
641		*/
642	<	public void testTryLockWhenReadLocked() {
642	>	public void testWriteHoldingWriteLockFair4() {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
644	>	lock.writeLock().lock();
645	>	Thread t1 = new Thread(new Runnable() {
646	>	public void run() {
647	>	lock.writeLock().lock();
648	>	lock.writeLock().unlock();
649	>	}
650	>	});
651	>	Thread t2 = new Thread(new Runnable() {
652	>	public void run() {
653	>	lock.writeLock().lock();
654	>	lock.writeLock().unlock();
655	>	}
656	>	});
657	>
658	>	try {
659	>	t1.start();
660	>	t2.start();
661	>	Thread.sleep(SHORT_DELAY_MS);
662	>	assertTrue(lock.isWriteLockedByCurrentThread());
663	>	assertTrue(lock.getWriteHoldCount() == 1);
664	>	lock.writeLock().lock();
665	>	assertTrue(lock.getWriteHoldCount() == 2);
666	>	lock.writeLock().unlock();
667	>	lock.writeLock().lock();
668	>	lock.writeLock().unlock();
669	>	lock.writeLock().unlock();
670	>	t1.join(MEDIUM_DELAY_MS);
671	>	t2.join(MEDIUM_DELAY_MS);
672	>	assertTrue(!t1.isAlive());
673	>	assertTrue(!t2.isAlive());
674	>
675	>	} catch(Exception e){
676	>	unexpectedException();
677	>	}
678	>	}
679	>
680	>
681	>	/**
682	>	* Read tryLock succeeds if readlocked but not writelocked
683	>	*/
684	>	public void testTryLockWhenReadLocked() {
685		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
686		lock.readLock().lock();
687		Thread t = new Thread(new Runnable() {
#	Line 299 | Line 697 | public class ReentrantReadWriteLockTest
697		} catch(Exception e){
698		unexpectedException();
699		}
700	<	}
700	>	}
701	>
702
304	–
703
704		/**
705	<	* write trylock fails when readlocked
705	>	* write tryLock fails when readlocked
706		*/
707	<	public void testWriteTryLockWhenReadLocked() {
707	>	public void testWriteTryLockWhenReadLocked() {
708		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
709		lock.readLock().lock();
710		Thread t = new Thread(new Runnable() {
#	Line 321 | Line 719 | public class ReentrantReadWriteLockTest
719		} catch(Exception e){
720		unexpectedException();
721		}
722	<	}
722	>	}
723	>
724	>
725	>	/**
726	>	* Fair Read tryLock succeeds if readlocked but not writelocked
727	>	*/
728	>	public void testTryLockWhenReadLockedFair() {
729	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
730	>	lock.readLock().lock();
731	>	Thread t = new Thread(new Runnable() {
732	>	public void run() {
733	>	threadAssertTrue(lock.readLock().tryLock());
734	>	lock.readLock().unlock();
735	>	}
736	>	});
737	>	try {
738	>	t.start();
739	>	t.join();
740	>	lock.readLock().unlock();
741	>	} catch(Exception e){
742	>	unexpectedException();
743	>	}
744	>	}
745	>
746	>
747	>
748	>	/**
749	>	* Fair write tryLock fails when readlocked
750	>	*/
751	>	public void testWriteTryLockWhenReadLockedFair() {
752	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
753	>	lock.readLock().lock();
754	>	Thread t = new Thread(new Runnable() {
755	>	public void run() {
756	>	threadAssertFalse(lock.writeLock().tryLock());
757	>	}
758	>	});
759	>	try {
760	>	t.start();
761	>	t.join();
762	>	lock.readLock().unlock();
763	>	} catch(Exception e){
764	>	unexpectedException();
765	>	}
766	>	}
767	>
768
326	–
769
770		/**
771	<	* write timed trylock times out if locked
771	>	* write timed tryLock times out if locked
772		*/
773	<	public void testWriteTryLock_Timeout() {
773	>	public void testWriteTryLock_Timeout() {
774		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
775		lock.writeLock().lock();
776		Thread t = new Thread(new Runnable() {
#	Line 347 | Line 789 | public class ReentrantReadWriteLockTest
789		} catch(Exception e){
790		unexpectedException();
791		}
792	<	}
792	>	}
793
794		/**
795	<	* read timed trylock times out if write-locked
795	>	* read timed tryLock times out if write-locked
796		*/
797	<	public void testReadTryLock_Timeout() {
797	>	public void testReadTryLock_Timeout() {
798		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
799		lock.writeLock().lock();
800		Thread t = new Thread(new Runnable() {
#	Line 371 | Line 813 | public class ReentrantReadWriteLockTest
813		} catch(Exception e){
814		unexpectedException();
815		}
816	<	}
816	>	}
817
818
819		/**
#	Line 384 | Line 826 | public class ReentrantReadWriteLockTest
826		} catch(Exception e) {
827		unexpectedException();
828		}
829	<	Thread t = new Thread(new Runnable() {
829	>	Thread t = new Thread(new Runnable() {
830		public void run() {
831		try {
832		lock.writeLock().lockInterruptibly();
#	Line 396 | Line 838 | public class ReentrantReadWriteLockTest
838		});
839		try {
840		t.start();
841	+	Thread.sleep(SHORT_DELAY_MS);
842		t.interrupt();
843	+	Thread.sleep(SHORT_DELAY_MS);
844		t.join();
845		lock.writeLock().unlock();
846		} catch(Exception e){
#	Line 414 | Line 858 | public class ReentrantReadWriteLockTest
858		} catch(Exception e) {
859		unexpectedException();
860		}
861	<	Thread t = new Thread(new Runnable() {
861	>	Thread t = new Thread(new Runnable() {
862		public void run() {
863		try {
864		lock.readLock().lockInterruptibly();
#	Line 426 | Line 870 | public class ReentrantReadWriteLockTest
870		});
871		try {
872		t.start();
873	+	Thread.sleep(SHORT_DELAY_MS);
874		t.interrupt();
875		t.join();
876		lock.writeLock().unlock();
#	Line 438 | Line 883 | public class ReentrantReadWriteLockTest
883		* Calling await without holding lock throws IllegalMonitorStateException
884		*/
885		public void testAwait_IllegalMonitor() {
886	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
886	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
887		final Condition c = lock.writeLock().newCondition();
888		try {
889		c.await();
#	Line 455 | Line 900 | public class ReentrantReadWriteLockTest
900		* Calling signal without holding lock throws IllegalMonitorStateException
901		*/
902		public void testSignal_IllegalMonitor() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904		final Condition c = lock.writeLock().newCondition();
905		try {
906		c.signal();
#	Line 472 | Line 917 | public class ReentrantReadWriteLockTest
917		* awaitNanos without a signal times out
918		*/
919		public void testAwaitNanos_Timeout() {
920	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
920	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
921		final Condition c = lock.writeLock().newCondition();
922		try {
923		lock.writeLock().lock();
#	Line 490 | Line 935 | public class ReentrantReadWriteLockTest
935		*  timed await without a signal times out
936		*/
937		public void testAwait_Timeout() {
938	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
939		final Condition c = lock.writeLock().newCondition();
940		try {
941		lock.writeLock().lock();
497	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
942		lock.writeLock().unlock();
943		}
944		catch (Exception ex) {
#	Line 506 | Line 950 | public class ReentrantReadWriteLockTest
950		* awaitUntil without a signal times out
951		*/
952		public void testAwaitUntil_Timeout() {
953	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
954		final Condition c = lock.writeLock().newCondition();
955		try {
956		lock.writeLock().lock();
957		java.util.Date d = new java.util.Date();
514	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
958		lock.writeLock().unlock();
959		}
960		catch (Exception ex) {
#	Line 523 | Line 966 | public class ReentrantReadWriteLockTest
966		* await returns when signalled
967		*/
968		public void testAwait() {
969	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
969	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
970		final Condition c = lock.writeLock().newCondition();
971	<	Thread t = new Thread(new Runnable() {
971	>	Thread t = new Thread(new Runnable() {
972		public void run() {
973		try {
974		lock.writeLock().lock();
#	Line 552 | Line 995 | public class ReentrantReadWriteLockTest
995		}
996		}
997
998	+	/** A helper class for uninterruptible wait tests */
999	+	class UninterruptableThread extends Thread {
1000	+	private Lock lock;
1001	+	private Condition c;
1002	+
1003	+	public volatile boolean canAwake = false;
1004	+	public volatile boolean interrupted = false;
1005	+	public volatile boolean lockStarted = false;
1006	+
1007	+	public UninterruptableThread(Lock lock, Condition c) {
1008	+	this.lock = lock;
1009	+	this.c = c;
1010	+	}
1011	+
1012	+	public synchronized void run() {
1013	+	lock.lock();
1014	+	lockStarted = true;
1015	+
1016	+	while (!canAwake) {
1017	+	c.awaitUninterruptibly();
1018	+	}
1019	+
1020	+	interrupted = isInterrupted();
1021	+	lock.unlock();
1022	+	}
1023	+	}
1024	+
1025		/**
1026		* awaitUninterruptibly doesn't abort on interrupt
1027		*/
1028		public void testAwaitUninterruptibly() {
1029	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1029	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1030		final Condition c = lock.writeLock().newCondition();
1031	<	Thread t = new Thread(new Runnable() {
562	<	public void run() {
563	<	lock.writeLock().lock();
564	<	c.awaitUninterruptibly();
565	<	lock.writeLock().unlock();
566	<	}
567	<	});
1031	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1032
1033		try {
1034	<	t.start();
1035	<	Thread.sleep(SHORT_DELAY_MS);
1036	<	t.interrupt();
1034	>	thread.start();
1035	>
1036	>	while (!thread.lockStarted) {
1037	>	Thread.sleep(100);
1038	>	}
1039	>
1040		lock.writeLock().lock();
1041	<	c.signal();
1042	<	lock.writeLock().unlock();
1043	<	assert(t.isInterrupted());
1044	<	t.join(SHORT_DELAY_MS);
1045	<	assertFalse(t.isAlive());
1046	<	}
1047	<	catch (Exception ex) {
1041	>	try {
1042	>	thread.interrupt();
1043	>	thread.canAwake = true;
1044	>	c.signal();
1045	>	} finally {
1046	>	lock.writeLock().unlock();
1047	>	}
1048	>
1049	>	thread.join();
1050	>	assertTrue(thread.interrupted);
1051	>	assertFalse(thread.isAlive());
1052	>	} catch (Exception ex) {
1053		unexpectedException();
1054		}
1055		}
#	Line 586 | Line 1058 | public class ReentrantReadWriteLockTest
1058		* await is interruptible
1059		*/
1060		public void testAwait_Interrupt() {
1061	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1061	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1062		final Condition c = lock.writeLock().newCondition();
1063	<	Thread t = new Thread(new Runnable() {
1063	>	Thread t = new Thread(new Runnable() {
1064		public void run() {
1065		try {
1066		lock.writeLock().lock();
#	Line 617 | Line 1089 | public class ReentrantReadWriteLockTest
1089		* awaitNanos is interruptible
1090		*/
1091		public void testAwaitNanos_Interrupt() {
1092	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1092	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1093		final Condition c = lock.writeLock().newCondition();
1094	<	Thread t = new Thread(new Runnable() {
1094	>	Thread t = new Thread(new Runnable() {
1095		public void run() {
1096		try {
1097		lock.writeLock().lock();
#	Line 648 | Line 1120 | public class ReentrantReadWriteLockTest
1120		* awaitUntil is interruptible
1121		*/
1122		public void testAwaitUntil_Interrupt() {
1123	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1123	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1124		final Condition c = lock.writeLock().newCondition();
1125	<	Thread t = new Thread(new Runnable() {
1125	>	Thread t = new Thread(new Runnable() {
1126		public void run() {
1127		try {
1128		lock.writeLock().lock();
#	Line 680 | Line 1152 | public class ReentrantReadWriteLockTest
1152		* signalAll wakes up all threads
1153		*/
1154		public void testSignalAll() {
1155	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1155	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1156		final Condition c = lock.writeLock().newCondition();
1157	<	Thread t1 = new Thread(new Runnable() {
1157	>	Thread t1 = new Thread(new Runnable() {
1158		public void run() {
1159		try {
1160		lock.writeLock().lock();
#	Line 695 | Line 1167 | public class ReentrantReadWriteLockTest
1167		}
1168		});
1169
1170	<	Thread t2 = new Thread(new Runnable() {
1170	>	Thread t2 = new Thread(new Runnable() {
1171		public void run() {
1172		try {
1173		lock.writeLock().lock();
#	Line 750 | Line 1222 | public class ReentrantReadWriteLockTest
1222		}
1223		}
1224
1225	+	/**
1226	+	* hasQueuedThreads reports whether there are waiting threads
1227	+	*/
1228	+	public void testhasQueuedThreads() {
1229	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1230	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1231	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1232	+	try {
1233	+	assertFalse(lock.hasQueuedThreads());
1234	+	lock.writeLock().lock();
1235	+	t1.start();
1236	+	Thread.sleep(SHORT_DELAY_MS);
1237	+	assertTrue(lock.hasQueuedThreads());
1238	+	t2.start();
1239	+	Thread.sleep(SHORT_DELAY_MS);
1240	+	assertTrue(lock.hasQueuedThreads());
1241	+	t1.interrupt();
1242	+	Thread.sleep(SHORT_DELAY_MS);
1243	+	assertTrue(lock.hasQueuedThreads());
1244	+	lock.writeLock().unlock();
1245	+	Thread.sleep(SHORT_DELAY_MS);
1246	+	assertFalse(lock.hasQueuedThreads());
1247	+	t1.join();
1248	+	t2.join();
1249	+	} catch(Exception e){
1250	+	unexpectedException();
1251	+	}
1252	+	}
1253	+
1254	+	/**
1255	+	* hasQueuedThread(null) throws NPE
1256	+	*/
1257	+	public void testHasQueuedThreadNPE() {
1258	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1259	+	try {
1260	+	sync.hasQueuedThread(null);
1261	+	shouldThrow();
1262	+	} catch (NullPointerException success) {
1263	+	}
1264	+	}
1265	+
1266	+	/**
1267	+	* hasQueuedThread reports whether a thread is queued.
1268	+	*/
1269	+	public void testHasQueuedThread() {
1270	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1271	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1272	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1273	+	try {
1274	+	assertFalse(sync.hasQueuedThread(t1));
1275	+	assertFalse(sync.hasQueuedThread(t2));
1276	+	sync.writeLock().lock();
1277	+	t1.start();
1278	+	Thread.sleep(SHORT_DELAY_MS);
1279	+	assertTrue(sync.hasQueuedThread(t1));
1280	+	t2.start();
1281	+	Thread.sleep(SHORT_DELAY_MS);
1282	+	assertTrue(sync.hasQueuedThread(t1));
1283	+	assertTrue(sync.hasQueuedThread(t2));
1284	+	t1.interrupt();
1285	+	Thread.sleep(SHORT_DELAY_MS);
1286	+	assertFalse(sync.hasQueuedThread(t1));
1287	+	assertTrue(sync.hasQueuedThread(t2));
1288	+	sync.writeLock().unlock();
1289	+	Thread.sleep(SHORT_DELAY_MS);
1290	+	assertFalse(sync.hasQueuedThread(t1));
1291	+	Thread.sleep(SHORT_DELAY_MS);
1292	+	assertFalse(sync.hasQueuedThread(t2));
1293	+	t1.join();
1294	+	t2.join();
1295	+	} catch(Exception e){
1296	+	unexpectedException();
1297	+	}
1298	+	}
1299	+
1300	+
1301	+	/**
1302	+	* getQueueLength reports number of waiting threads
1303	+	*/
1304	+	public void testGetQueueLength() {
1305	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1306	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1307	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1308	+	try {
1309	+	assertEquals(0, lock.getQueueLength());
1310	+	lock.writeLock().lock();
1311	+	t1.start();
1312	+	Thread.sleep(SHORT_DELAY_MS);
1313	+	assertEquals(1, lock.getQueueLength());
1314	+	t2.start();
1315	+	Thread.sleep(SHORT_DELAY_MS);
1316	+	assertEquals(2, lock.getQueueLength());
1317	+	t1.interrupt();
1318	+	Thread.sleep(SHORT_DELAY_MS);
1319	+	assertEquals(1, lock.getQueueLength());
1320	+	lock.writeLock().unlock();
1321	+	Thread.sleep(SHORT_DELAY_MS);
1322	+	assertEquals(0, lock.getQueueLength());
1323	+	t1.join();
1324	+	t2.join();
1325	+	} catch(Exception e){
1326	+	unexpectedException();
1327	+	}
1328	+	}
1329	+
1330	+	/**
1331	+	* getQueuedThreads includes waiting threads
1332	+	*/
1333	+	public void testGetQueuedThreads() {
1334	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1335	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1336	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1337	+	try {
1338	+	assertTrue(lock.getQueuedThreads().isEmpty());
1339	+	lock.writeLock().lock();
1340	+	assertTrue(lock.getQueuedThreads().isEmpty());
1341	+	t1.start();
1342	+	Thread.sleep(SHORT_DELAY_MS);
1343	+	assertTrue(lock.getQueuedThreads().contains(t1));
1344	+	t2.start();
1345	+	Thread.sleep(SHORT_DELAY_MS);
1346	+	assertTrue(lock.getQueuedThreads().contains(t1));
1347	+	assertTrue(lock.getQueuedThreads().contains(t2));
1348	+	t1.interrupt();
1349	+	Thread.sleep(SHORT_DELAY_MS);
1350	+	assertFalse(lock.getQueuedThreads().contains(t1));
1351	+	assertTrue(lock.getQueuedThreads().contains(t2));
1352	+	lock.writeLock().unlock();
1353	+	Thread.sleep(SHORT_DELAY_MS);
1354	+	assertTrue(lock.getQueuedThreads().isEmpty());
1355	+	t1.join();
1356	+	t2.join();
1357	+	} catch(Exception e){
1358	+	unexpectedException();
1359	+	}
1360	+	}
1361	+
1362	+	/**
1363	+	* hasWaiters throws NPE if null
1364	+	*/
1365	+	public void testHasWaitersNPE() {
1366	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1367	+	try {
1368	+	lock.hasWaiters(null);
1369	+	shouldThrow();
1370	+	} catch (NullPointerException success) {
1371	+	} catch (Exception ex) {
1372	+	unexpectedException();
1373	+	}
1374	+	}
1375	+
1376	+	/**
1377	+	* getWaitQueueLength throws NPE if null
1378	+	*/
1379	+	public void testGetWaitQueueLengthNPE() {
1380	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1381	+	try {
1382	+	lock.getWaitQueueLength(null);
1383	+	shouldThrow();
1384	+	} catch (NullPointerException success) {
1385	+	} catch (Exception ex) {
1386	+	unexpectedException();
1387	+	}
1388	+	}
1389	+
1390	+
1391	+	/**
1392	+	* getWaitingThreads throws NPE if null
1393	+	*/
1394	+	public void testGetWaitingThreadsNPE() {
1395	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1396	+	try {
1397	+	lock.getWaitingThreads(null);
1398	+	shouldThrow();
1399	+	} catch (NullPointerException success) {
1400	+	} catch (Exception ex) {
1401	+	unexpectedException();
1402	+	}
1403	+	}
1404	+
1405	+	/**
1406	+	* hasWaiters throws IAE if not owned
1407	+	*/
1408	+	public void testHasWaitersIAE() {
1409	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1410	+	final Condition c = (lock.writeLock().newCondition());
1411	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1412	+	try {
1413	+	lock2.hasWaiters(c);
1414	+	shouldThrow();
1415	+	} catch (IllegalArgumentException success) {
1416	+	} catch (Exception ex) {
1417	+	unexpectedException();
1418	+	}
1419	+	}
1420	+
1421	+	/**
1422	+	* hasWaiters throws IMSE if not locked
1423	+	*/
1424	+	public void testHasWaitersIMSE() {
1425	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1426	+	final Condition c = (lock.writeLock().newCondition());
1427	+	try {
1428	+	lock.hasWaiters(c);
1429	+	shouldThrow();
1430	+	} catch (IllegalMonitorStateException success) {
1431	+	} catch (Exception ex) {
1432	+	unexpectedException();
1433	+	}
1434	+	}
1435	+
1436	+
1437	+	/**
1438	+	* getWaitQueueLength throws IAE if not owned
1439	+	*/
1440	+	public void testGetWaitQueueLengthIAE() {
1441	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1442	+	final Condition c = (lock.writeLock().newCondition());
1443	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1444	+	try {
1445	+	lock2.getWaitQueueLength(c);
1446	+	shouldThrow();
1447	+	} catch (IllegalArgumentException success) {
1448	+	} catch (Exception ex) {
1449	+	unexpectedException();
1450	+	}
1451	+	}
1452	+
1453	+	/**
1454	+	* getWaitQueueLength throws IMSE if not locked
1455	+	*/
1456	+	public void testGetWaitQueueLengthIMSE() {
1457	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1458	+	final Condition c = (lock.writeLock().newCondition());
1459	+	try {
1460	+	lock.getWaitQueueLength(c);
1461	+	shouldThrow();
1462	+	} catch (IllegalMonitorStateException success) {
1463	+	} catch (Exception ex) {
1464	+	unexpectedException();
1465	+	}
1466	+	}
1467	+
1468	+
1469	+	/**
1470	+	* getWaitingThreads throws IAE if not owned
1471	+	*/
1472	+	public void testGetWaitingThreadsIAE() {
1473	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1474	+	final Condition c = (lock.writeLock().newCondition());
1475	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1476	+	try {
1477	+	lock2.getWaitingThreads(c);
1478	+	shouldThrow();
1479	+	} catch (IllegalArgumentException success) {
1480	+	} catch (Exception ex) {
1481	+	unexpectedException();
1482	+	}
1483	+	}
1484	+
1485	+	/**
1486	+	* getWaitingThreads throws IMSE if not locked
1487	+	*/
1488	+	public void testGetWaitingThreadsIMSE() {
1489	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1490	+	final Condition c = (lock.writeLock().newCondition());
1491	+	try {
1492	+	lock.getWaitingThreads(c);
1493	+	shouldThrow();
1494	+	} catch (IllegalMonitorStateException success) {
1495	+	} catch (Exception ex) {
1496	+	unexpectedException();
1497	+	}
1498	+	}
1499	+
1500	+
1501	+	/**
1502	+	* hasWaiters returns true when a thread is waiting, else false
1503	+	*/
1504	+	public void testHasWaiters() {
1505	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1506	+	final Condition c = (lock.writeLock().newCondition());
1507	+	Thread t = new Thread(new Runnable() {
1508	+	public void run() {
1509	+	try {
1510	+	lock.writeLock().lock();
1511	+	threadAssertFalse(lock.hasWaiters(c));
1512	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1513	+	c.await();
1514	+	lock.writeLock().unlock();
1515	+	}
1516	+	catch(InterruptedException e) {
1517	+	threadUnexpectedException();
1518	+	}
1519	+	}
1520	+	});
1521	+
1522	+	try {
1523	+	t.start();
1524	+	Thread.sleep(SHORT_DELAY_MS);
1525	+	lock.writeLock().lock();
1526	+	assertTrue(lock.hasWaiters(c));
1527	+	assertEquals(1, lock.getWaitQueueLength(c));
1528	+	c.signal();
1529	+	lock.writeLock().unlock();
1530	+	Thread.sleep(SHORT_DELAY_MS);
1531	+	lock.writeLock().lock();
1532	+	assertFalse(lock.hasWaiters(c));
1533	+	assertEquals(0, lock.getWaitQueueLength(c));
1534	+	lock.writeLock().unlock();
1535	+	t.join(SHORT_DELAY_MS);
1536	+	assertFalse(t.isAlive());
1537	+	}
1538	+	catch (Exception ex) {
1539	+	unexpectedException();
1540	+	}
1541	+	}
1542	+
1543	+	/**
1544	+	* getWaitQueueLength returns number of waiting threads
1545	+	*/
1546	+	public void testGetWaitQueueLength() {
1547	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1548	+	final Condition c = (lock.writeLock().newCondition());
1549	+	Thread t = new Thread(new Runnable() {
1550	+	public void run() {
1551	+	try {
1552	+	lock.writeLock().lock();
1553	+	threadAssertFalse(lock.hasWaiters(c));
1554	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1555	+	c.await();
1556	+	lock.writeLock().unlock();
1557	+	}
1558	+	catch(InterruptedException e) {
1559	+	threadUnexpectedException();
1560	+	}
1561	+	}
1562	+	});
1563	+
1564	+	try {
1565	+	t.start();
1566	+	Thread.sleep(SHORT_DELAY_MS);
1567	+	lock.writeLock().lock();
1568	+	assertTrue(lock.hasWaiters(c));
1569	+	assertEquals(1, lock.getWaitQueueLength(c));
1570	+	c.signal();
1571	+	lock.writeLock().unlock();
1572	+	Thread.sleep(SHORT_DELAY_MS);
1573	+	lock.writeLock().lock();
1574	+	assertFalse(lock.hasWaiters(c));
1575	+	assertEquals(0, lock.getWaitQueueLength(c));
1576	+	lock.writeLock().unlock();
1577	+	t.join(SHORT_DELAY_MS);
1578	+	assertFalse(t.isAlive());
1579	+	}
1580	+	catch (Exception ex) {
1581	+	unexpectedException();
1582	+	}
1583	+	}
1584	+
1585	+
1586	+	/**
1587	+	* getWaitingThreads returns only and all waiting threads
1588	+	*/
1589	+	public void testGetWaitingThreads() {
1590	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1591	+	final Condition c = lock.writeLock().newCondition();
1592	+	Thread t1 = new Thread(new Runnable() {
1593	+	public void run() {
1594	+	try {
1595	+	lock.writeLock().lock();
1596	+	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1597	+	c.await();
1598	+	lock.writeLock().unlock();
1599	+	}
1600	+	catch(InterruptedException e) {
1601	+	threadUnexpectedException();
1602	+	}
1603	+	}
1604	+	});
1605	+
1606	+	Thread t2 = new Thread(new Runnable() {
1607	+	public void run() {
1608	+	try {
1609	+	lock.writeLock().lock();
1610	+	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1611	+	c.await();
1612	+	lock.writeLock().unlock();
1613	+	}
1614	+	catch(InterruptedException e) {
1615	+	threadUnexpectedException();
1616	+	}
1617	+	}
1618	+	});
1619	+
1620	+	try {
1621	+	lock.writeLock().lock();
1622	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1623	+	lock.writeLock().unlock();
1624	+	t1.start();
1625	+	Thread.sleep(SHORT_DELAY_MS);
1626	+	t2.start();
1627	+	Thread.sleep(SHORT_DELAY_MS);
1628	+	lock.writeLock().lock();
1629	+	assertTrue(lock.hasWaiters(c));
1630	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1631	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1632	+	c.signalAll();
1633	+	lock.writeLock().unlock();
1634	+	Thread.sleep(SHORT_DELAY_MS);
1635	+	lock.writeLock().lock();
1636	+	assertFalse(lock.hasWaiters(c));
1637	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1638	+	lock.writeLock().unlock();
1639	+	t1.join(SHORT_DELAY_MS);
1640	+	t2.join(SHORT_DELAY_MS);
1641	+	assertFalse(t1.isAlive());
1642	+	assertFalse(t2.isAlive());
1643	+	}
1644	+	catch (Exception ex) {
1645	+	unexpectedException();
1646	+	}
1647	+	}
1648	+
1649	+	/**
1650	+	* toString indicates current lock state
1651	+	*/
1652	+	public void testToString() {
1653	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1654	+	String us = lock.toString();
1655	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1656	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1657	+	lock.writeLock().lock();
1658	+	String ws = lock.toString();
1659	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1660	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1661	+	lock.writeLock().unlock();
1662	+	lock.readLock().lock();
1663	+	lock.readLock().lock();
1664	+	String rs = lock.toString();
1665	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1666	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1667	+	}
1668	+
1669	+	/**
1670	+	* readLock.toString indicates current lock state
1671	+	*/
1672	+	public void testReadLockToString() {
1673	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1674	+	String us = lock.readLock().toString();
1675	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1676	+	lock.readLock().lock();
1677	+	lock.readLock().lock();
1678	+	String rs = lock.readLock().toString();
1679	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1680	+	}
1681	+
1682	+	/**
1683	+	* writeLock.toString indicates current lock state
1684	+	*/
1685	+	public void testWriteLockToString() {
1686	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1687	+	String us = lock.writeLock().toString();
1688	+	assertTrue(us.indexOf("Unlocked") >= 0);
1689	+	lock.writeLock().lock();
1690	+	String ls = lock.writeLock().toString();
1691	+	assertTrue(ls.indexOf("Locked") >= 0);
1692	+	}
1693
1694		}

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