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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.23 by dl, Mon Aug 1 19:53:01 2005 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 TestCase {
13	<	static int HOLD_COUNT_TEST_LIMIT = 20;
14	<
15	>	public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17		junit.textui.TestRunner.run (suite());
18		}
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	+	/**
80	+	* write-locking and read-locking an unlocked lock succeed
81	+	*/
82	+	public void testLock() {
83	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84	+	rl.writeLock().lock();
85	+	assertTrue(rl.isWriteLocked());
86	+	assertTrue(rl.isWriteLockedByCurrentThread());
87	+	assertEquals(0, rl.getReadLockCount());
88	+	rl.writeLock().unlock();
89	+	assertFalse(rl.isWriteLocked());
90	+	assertFalse(rl.isWriteLockedByCurrentThread());
91	+	assertEquals(0, rl.getReadLockCount());
92	+	rl.readLock().lock();
93	+	assertFalse(rl.isWriteLocked());
94	+	assertFalse(rl.isWriteLockedByCurrentThread());
95	+	assertEquals(1, rl.getReadLockCount());
96	+	rl.readLock().unlock();
97	+	assertFalse(rl.isWriteLocked());
98	+	assertFalse(rl.isWriteLockedByCurrentThread());
99	+	assertEquals(0, rl.getReadLockCount());
100	+	}
101	+
102	+
103	+	/**
104	+	* locking an unlocked fair lock succeeds
105	+	*/
106	+	public void testFairLock() {
107	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	+	rl.writeLock().lock();
109	+	assertTrue(rl.isWriteLocked());
110	+	assertTrue(rl.isWriteLockedByCurrentThread());
111	+	assertEquals(0, rl.getReadLockCount());
112	+	rl.writeLock().unlock();
113	+	assertFalse(rl.isWriteLocked());
114	+	assertFalse(rl.isWriteLockedByCurrentThread());
115	+	assertEquals(0, rl.getReadLockCount());
116	+	rl.readLock().lock();
117	+	assertFalse(rl.isWriteLocked());
118	+	assertFalse(rl.isWriteLockedByCurrentThread());
119	+	assertEquals(1, rl.getReadLockCount());
120	+	rl.readLock().unlock();
121	+	assertFalse(rl.isWriteLocked());
122	+	assertFalse(rl.isWriteLockedByCurrentThread());
123	+	assertEquals(0, rl.getReadLockCount());
124	+	}
125	+
126	+	/**
127	+	* getWriteHoldCount returns number of recursive holds
128	+	*/
129	+	public void testGetWriteHoldCount() {
130	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
131	+	for(int i = 1; i <= SIZE; i++) {
132	+	lock.writeLock().lock();
133	+	assertEquals(i,lock.getWriteHoldCount());
134	+	}
135	+	for(int i = SIZE; i > 0; i--) {
136	+	lock.writeLock().unlock();
137	+	assertEquals(i-1,lock.getWriteHoldCount());
138	+	}
139	+	}
140
141	<	private static long SHORT_DELAY_MS = 100;
142	<	private static long MEDIUM_DELAY_MS = 1000;
26	<	private static long LONG_DELAY_MS = 10000;
27	<
28	<	/*
29	<	* Unlocks an unlocked lock, throws Illegal Monitor State
30	<	*
141	>	/**
142	>	* getReadHoldCount returns number of recursive holds
143		*/
144	+	public void testGetReadHoldCount() {
145	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
146	+	for(int i = 1; i <= SIZE; i++) {
147	+	lock.readLock().lock();
148	+	assertEquals(i,lock.getReadHoldCount());
149	+	}
150	+	for(int i = SIZE; i > 0; i--) {
151	+	lock.readLock().unlock();
152	+	assertEquals(i-1,lock.getReadHoldCount());
153	+	}
154	+	}
155
156	<	public void testIllegalMonitorStateException(){
156	>
157	>	/**
158	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
159	>	*/
160	>	public void testUnlock_IllegalMonitorStateException() {
161		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
162	<	try{
162	>	try {
163		rl.writeLock().unlock();
164	<	fail("Should of thown Illegal Monitor State Exception");
164	>	shouldThrow();
165	>	} catch(IllegalMonitorStateException success){}
166	>	}
167
39	–	}catch(IllegalMonitorStateException sucess){}
168
169	+	/**
170	+	* write-lockInterruptibly is interruptible
171	+	*/
172	+	public void testWriteLockInterruptibly_Interrupted() {
173	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	+	Thread t = new Thread(new Runnable() {
175	+	public void run() {
176	+	try {
177	+	lock.writeLock().lockInterruptibly();
178	+	lock.writeLock().unlock();
179	+	lock.writeLock().lockInterruptibly();
180	+	lock.writeLock().unlock();
181	+	} catch(InterruptedException success){}
182	+	}
183	+	});
184	+	try {
185	+	lock.writeLock().lock();
186	+	t.start();
187	+	t.interrupt();
188	+	lock.writeLock().unlock();
189	+	t.join();
190	+	} catch(Exception e){
191	+	unexpectedException();
192	+	}
193	+	}
194
195	+	/**
196	+	* timed write-tryLock is interruptible
197	+	*/
198	+	public void testWriteTryLock_Interrupted() {
199	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
200	+	lock.writeLock().lock();
201	+	Thread t = new Thread(new Runnable() {
202	+	public void run() {
203	+	try {
204	+	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
205	+	} catch(InterruptedException success){}
206	+	}
207	+	});
208	+	try {
209	+	t.start();
210	+	t.interrupt();
211	+	lock.writeLock().unlock();
212	+	t.join();
213	+	} catch(Exception e){
214	+	unexpectedException();
215	+	}
216		}
217	+
218	+	/**
219	+	* read-lockInterruptibly is interruptible
220	+	*/
221	+	public void testReadLockInterruptibly_Interrupted() {
222	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
223	+	lock.writeLock().lock();
224	+	Thread t = new Thread(new Runnable() {
225	+	public void run() {
226	+	try {
227	+	lock.readLock().lockInterruptibly();
228	+	} catch(InterruptedException success){}
229	+	}
230	+	});
231	+	try {
232	+	t.start();
233	+	t.interrupt();
234	+	lock.writeLock().unlock();
235	+	t.join();
236	+	} catch(Exception e){
237	+	unexpectedException();
238	+	}
239	+	}
240	+
241	+	/**
242	+	* timed read-tryLock is interruptible
243	+	*/
244	+	public void testReadTryLock_Interrupted() {
245	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
246	+	lock.writeLock().lock();
247	+	Thread t = new Thread(new Runnable() {
248	+	public void run() {
249	+	try {
250	+	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
251	+	threadShouldThrow();
252	+	} catch(InterruptedException success){}
253	+	}
254	+	});
255	+	try {
256	+	t.start();
257	+	t.interrupt();
258	+	t.join();
259	+	} catch(Exception e){
260	+	unexpectedException();
261	+	}
262	+	}
263	+
264
265	<	/*
266	<	* makes a lock, locks it, tries to aquire the lock in another thread
46	<	* interrupts that thread and waits for an interrupted Exception to
47	<	* be thrown.
265	>	/**
266	>	* write-tryLock fails if locked
267		*/
268	+	public void testWriteTryLockWhenLocked() {
269	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	+	lock.writeLock().lock();
271	+	Thread t = new Thread(new Runnable() {
272	+	public void run() {
273	+	threadAssertFalse(lock.writeLock().tryLock());
274	+	}
275	+	});
276	+	try {
277	+	t.start();
278	+	t.join();
279	+	lock.writeLock().unlock();
280	+	} catch(Exception e){
281	+	unexpectedException();
282	+	}
283	+	}
284
285	<	public void testInterruptedException(){
285	>	/**
286	>	* read-tryLock fails if locked
287	>	*/
288	>	public void testReadTryLockWhenLocked() {
289		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
290		lock.writeLock().lock();
291		Thread t = new Thread(new Runnable() {
292	<	public void run(){
293	<	try{
294	<	lock.writeLock().lockInterruptibly();
295	<	fail("should throw");
296	<	}catch(InterruptedException sucess){}
292	>	public void run() {
293	>	threadAssertFalse(lock.readLock().tryLock());
294	>	}
295	>	});
296	>	try {
297	>	t.start();
298	>	t.join();
299	>	lock.writeLock().unlock();
300	>	} catch(Exception e){
301	>	unexpectedException();
302	>	}
303	>	}
304	>
305	>	/**
306	>	* Multiple threads can hold a read lock when not write-locked
307	>	*/
308	>	public void testMultipleReadLocks() {
309	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
310	>	lock.readLock().lock();
311	>	Thread t = new Thread(new Runnable() {
312	>	public void run() {
313	>	threadAssertTrue(lock.readLock().tryLock());
314	>	lock.readLock().unlock();
315	>	}
316	>	});
317	>	try {
318	>	t.start();
319	>	t.join();
320	>	lock.readLock().unlock();
321	>	} catch(Exception e){
322	>	unexpectedException();
323	>	}
324	>	}
325	>
326	>	/**
327	>	* A writelock succeeds after reading threads unlock
328	>	*/
329	>	public void testWriteAfterMultipleReadLocks() {
330	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
331	>	lock.readLock().lock();
332	>	Thread t1 = new Thread(new Runnable() {
333	>	public void run() {
334	>	lock.readLock().lock();
335	>	lock.readLock().unlock();
336	>	}
337	>	});
338	>	Thread t2 = new Thread(new Runnable() {
339	>	public void run() {
340	>	lock.writeLock().lock();
341	>	lock.writeLock().unlock();
342	>	}
343	>	});
344	>
345	>	try {
346	>	t1.start();
347	>	t2.start();
348	>	Thread.sleep(SHORT_DELAY_MS);
349	>	lock.readLock().unlock();
350	>	t1.join(MEDIUM_DELAY_MS);
351	>	t2.join(MEDIUM_DELAY_MS);
352	>	assertTrue(!t1.isAlive());
353	>	assertTrue(!t2.isAlive());
354	>
355	>	} catch(Exception e){
356	>	unexpectedException();
357	>	}
358	>	}
359	>
360	>	/**
361	>	* Readlocks succeed after a writing thread unlocks
362	>	*/
363	>	public void testReadAfterWriteLock() {
364	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
365	>	lock.writeLock().lock();
366	>	Thread t1 = new Thread(new Runnable() {
367	>	public void run() {
368	>	lock.readLock().lock();
369	>	lock.readLock().unlock();
370	>	}
371	>	});
372	>	Thread t2 = new Thread(new Runnable() {
373	>	public void run() {
374	>	lock.readLock().lock();
375	>	lock.readLock().unlock();
376	>	}
377	>	});
378	>
379	>	try {
380	>	t1.start();
381	>	t2.start();
382	>	Thread.sleep(SHORT_DELAY_MS);
383	>	lock.writeLock().unlock();
384	>	t1.join(MEDIUM_DELAY_MS);
385	>	t2.join(MEDIUM_DELAY_MS);
386	>	assertTrue(!t1.isAlive());
387	>	assertTrue(!t2.isAlive());
388	>
389	>	} catch(Exception e){
390	>	unexpectedException();
391	>	}
392	>	}
393	>
394	>	/**
395	>	* Read trylock succeeds if write locked by current thread
396	>	*/
397	>	public void testReadHoldingWriteLock() {
398	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
399	>	lock.writeLock().lock();
400	>	assertTrue(lock.readLock().tryLock());
401	>	lock.readLock().unlock();
402	>	lock.writeLock().unlock();
403	>	}
404	>
405	>	/**
406	>	* Read lock succeeds if write locked by current thread even if
407	>	* other threads are waiting for readlock
408	>	*/
409	>	public void testReadHoldingWriteLock2() {
410	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
411	>	lock.writeLock().lock();
412	>	Thread t1 = new Thread(new Runnable() {
413	>	public void run() {
414	>	lock.readLock().lock();
415	>	lock.readLock().unlock();
416	>	}
417	>	});
418	>	Thread t2 = new Thread(new Runnable() {
419	>	public void run() {
420	>	lock.readLock().lock();
421	>	lock.readLock().unlock();
422	>	}
423	>	});
424	>
425	>	try {
426	>	t1.start();
427	>	t2.start();
428	>	lock.readLock().lock();
429	>	lock.readLock().unlock();
430	>	Thread.sleep(SHORT_DELAY_MS);
431	>	lock.readLock().lock();
432	>	lock.readLock().unlock();
433	>	lock.writeLock().unlock();
434	>	t1.join(MEDIUM_DELAY_MS);
435	>	t2.join(MEDIUM_DELAY_MS);
436	>	assertTrue(!t1.isAlive());
437	>	assertTrue(!t2.isAlive());
438	>
439	>	} catch(Exception e){
440	>	unexpectedException();
441	>	}
442	>	}
443	>
444	>	/**
445	>	*  Read lock succeeds if write locked by current thread even if
446	>	* other threads are waiting for writelock
447	>	*/
448	>	public void testReadHoldingWriteLock3() {
449	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
450	>	lock.writeLock().lock();
451	>	Thread t1 = new Thread(new Runnable() {
452	>	public void run() {
453	>	lock.writeLock().lock();
454	>	lock.writeLock().unlock();
455		}
456		});
457	<	t.start();
458	<	t.interrupt();
459	<	lock.writeLock().unlock();
457	>	Thread t2 = new Thread(new Runnable() {
458	>	public void run() {
459	>	lock.writeLock().lock();
460	>	lock.writeLock().unlock();
461	>	}
462	>	});
463	>
464	>	try {
465	>	t1.start();
466	>	t2.start();
467	>	lock.readLock().lock();
468	>	lock.readLock().unlock();
469	>	Thread.sleep(SHORT_DELAY_MS);
470	>	lock.readLock().lock();
471	>	lock.readLock().unlock();
472	>	lock.writeLock().unlock();
473	>	t1.join(MEDIUM_DELAY_MS);
474	>	t2.join(MEDIUM_DELAY_MS);
475	>	assertTrue(!t1.isAlive());
476	>	assertTrue(!t2.isAlive());
477	>
478	>	} catch(Exception e){
479	>	unexpectedException();
480	>	}
481		}
482
483	<	/*
484	<	* tests for interrupted exception on a timed wait
485	<	*
483	>
484	>	/**
485	>	*  Write lock succeeds if write locked by current thread even if
486	>	* other threads are waiting for writelock
487		*/
488	+	public void testWriteHoldingWriteLock4() {
489	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
490	+	lock.writeLock().lock();
491	+	Thread t1 = new Thread(new Runnable() {
492	+	public void run() {
493	+	lock.writeLock().lock();
494	+	lock.writeLock().unlock();
495	+	}
496	+	});
497	+	Thread t2 = new Thread(new Runnable() {
498	+	public void run() {
499	+	lock.writeLock().lock();
500	+	lock.writeLock().unlock();
501	+	}
502	+	});
503	+
504	+	try {
505	+	t1.start();
506	+	t2.start();
507	+	lock.writeLock().lock();
508	+	lock.writeLock().unlock();
509	+	Thread.sleep(SHORT_DELAY_MS);
510	+	lock.writeLock().lock();
511	+	lock.writeLock().unlock();
512	+	lock.writeLock().unlock();
513	+	t1.join(MEDIUM_DELAY_MS);
514	+	t2.join(MEDIUM_DELAY_MS);
515	+	assertTrue(!t1.isAlive());
516	+	assertTrue(!t2.isAlive());
517	+
518	+	} catch(Exception e){
519	+	unexpectedException();
520	+	}
521	+	}
522	+
523	+
524	+	/**
525	+	* Fair Read trylock succeeds if write locked by current thread
526	+	*/
527	+	public void testReadHoldingWriteLockFair() {
528	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
529	+	lock.writeLock().lock();
530	+	assertTrue(lock.readLock().tryLock());
531	+	lock.readLock().unlock();
532	+	lock.writeLock().unlock();
533	+	}
534	+
535	+	/**
536	+	* Fair Read lock succeeds if write locked by current thread even if
537	+	* other threads are waiting for readlock
538	+	*/
539	+	public void testReadHoldingWriteLockFair2() {
540	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
541	+	lock.writeLock().lock();
542	+	Thread t1 = new Thread(new Runnable() {
543	+	public void run() {
544	+	lock.readLock().lock();
545	+	lock.readLock().unlock();
546	+	}
547	+	});
548	+	Thread t2 = new Thread(new Runnable() {
549	+	public void run() {
550	+	lock.readLock().lock();
551	+	lock.readLock().unlock();
552	+	}
553	+	});
554	+
555	+	try {
556	+	t1.start();
557	+	t2.start();
558	+	lock.readLock().lock();
559	+	lock.readLock().unlock();
560	+	Thread.sleep(SHORT_DELAY_MS);
561	+	lock.readLock().lock();
562	+	lock.readLock().unlock();
563	+	lock.writeLock().unlock();
564	+	t1.join(MEDIUM_DELAY_MS);
565	+	t2.join(MEDIUM_DELAY_MS);
566	+	assertTrue(!t1.isAlive());
567	+	assertTrue(!t2.isAlive());
568	+
569	+	} catch(Exception e){
570	+	unexpectedException();
571	+	}
572	+	}
573	+
574	+
575	+	/**
576	+	* Fair Read lock succeeds if write locked by current thread even if
577	+	* other threads are waiting for writelock
578	+	*/
579	+	public void testReadHoldingWriteLockFair3() {
580	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
581	+	lock.writeLock().lock();
582	+	Thread t1 = new Thread(new Runnable() {
583	+	public void run() {
584	+	lock.writeLock().lock();
585	+	lock.writeLock().unlock();
586	+	}
587	+	});
588	+	Thread t2 = new Thread(new Runnable() {
589	+	public void run() {
590	+	lock.writeLock().lock();
591	+	lock.writeLock().unlock();
592	+	}
593	+	});
594	+
595	+	try {
596	+	t1.start();
597	+	t2.start();
598	+	lock.readLock().lock();
599	+	lock.readLock().unlock();
600	+	Thread.sleep(SHORT_DELAY_MS);
601	+	lock.readLock().lock();
602	+	lock.readLock().unlock();
603	+	lock.writeLock().unlock();
604	+	t1.join(MEDIUM_DELAY_MS);
605	+	t2.join(MEDIUM_DELAY_MS);
606	+	assertTrue(!t1.isAlive());
607	+	assertTrue(!t2.isAlive());
608	+
609	+	} catch(Exception e){
610	+	unexpectedException();
611	+	}
612	+	}
613	+
614	+
615	+	/**
616	+	* Fair Write lock succeeds if write locked by current thread even if
617	+	* other threads are waiting for writelock
618	+	*/
619	+	public void testWriteHoldingWriteLockFair4() {
620	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
621	+	lock.writeLock().lock();
622	+	Thread t1 = new Thread(new Runnable() {
623	+	public void run() {
624	+	lock.writeLock().lock();
625	+	lock.writeLock().unlock();
626	+	}
627	+	});
628	+	Thread t2 = new Thread(new Runnable() {
629	+	public void run() {
630	+	lock.writeLock().lock();
631	+	lock.writeLock().unlock();
632	+	}
633	+	});
634	+
635	+	try {
636	+	t1.start();
637	+	t2.start();
638	+	Thread.sleep(SHORT_DELAY_MS);
639	+	assertTrue(lock.isWriteLockedByCurrentThread());
640	+	assertTrue(lock.getWriteHoldCount() == 1);
641	+	lock.writeLock().lock();
642	+	assertTrue(lock.getWriteHoldCount() == 2);
643	+	lock.writeLock().unlock();
644	+	lock.writeLock().lock();
645	+	lock.writeLock().unlock();
646	+	lock.writeLock().unlock();
647	+	t1.join(MEDIUM_DELAY_MS);
648	+	t2.join(MEDIUM_DELAY_MS);
649	+	assertTrue(!t1.isAlive());
650	+	assertTrue(!t2.isAlive());
651	+
652	+	} catch(Exception e){
653	+	unexpectedException();
654	+	}
655	+	}
656	+
657	+
658	+	/**
659	+	* Read tryLock succeeds if readlocked but not writelocked
660	+	*/
661	+	public void testTryLockWhenReadLocked() {
662	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
663	+	lock.readLock().lock();
664	+	Thread t = new Thread(new Runnable() {
665	+	public void run() {
666	+	threadAssertTrue(lock.readLock().tryLock());
667	+	lock.readLock().unlock();
668	+	}
669	+	});
670	+	try {
671	+	t.start();
672	+	t.join();
673	+	lock.readLock().unlock();
674	+	} catch(Exception e){
675	+	unexpectedException();
676	+	}
677	+	}
678	+
679	+
680	+
681	+	/**
682	+	* write tryLock fails when readlocked
683	+	*/
684	+	public void testWriteTryLockWhenReadLocked() {
685	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
686	+	lock.readLock().lock();
687	+	Thread t = new Thread(new Runnable() {
688	+	public void run() {
689	+	threadAssertFalse(lock.writeLock().tryLock());
690	+	}
691	+	});
692	+	try {
693	+	t.start();
694	+	t.join();
695	+	lock.readLock().unlock();
696	+	} catch(Exception e){
697	+	unexpectedException();
698	+	}
699	+	}
700	+
701
702
703	<	public void testInterruptedException2(){
703	>	/**
704	>	* write timed tryLock times out if locked
705	>	*/
706	>	public void testWriteTryLock_Timeout() {
707		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
708		lock.writeLock().lock();
709		Thread t = new Thread(new Runnable() {
710	<	public void run(){
711	<	try{
712	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
713	<	fail("should throw");
714	<	}catch(InterruptedException sucess){}
710	>	public void run() {
711	>	try {
712	>	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
713	>	} catch (Exception ex) {
714	>	threadUnexpectedException();
715	>	}
716	>	}
717	>	});
718	>	try {
719	>	t.start();
720	>	t.join();
721	>	lock.writeLock().unlock();
722	>	} catch(Exception e){
723	>	unexpectedException();
724	>	}
725	>	}
726	>
727	>	/**
728	>	* read timed tryLock times out if write-locked
729	>	*/
730	>	public void testReadTryLock_Timeout() {
731	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
732	>	lock.writeLock().lock();
733	>	Thread t = new Thread(new Runnable() {
734	>	public void run() {
735	>	try {
736	>	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
737	>	} catch (Exception ex) {
738	>	threadUnexpectedException();
739	>	}
740	>	}
741	>	});
742	>	try {
743	>	t.start();
744	>	t.join();
745	>	lock.writeLock().unlock();
746	>	} catch(Exception e){
747	>	unexpectedException();
748	>	}
749	>	}
750	>
751	>
752	>	/**
753	>	* write lockInterruptibly succeeds if lock free else is interruptible
754	>	*/
755	>	public void testWriteLockInterruptibly() {
756	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
757	>	try {
758	>	lock.writeLock().lockInterruptibly();
759	>	} catch(Exception e) {
760	>	unexpectedException();
761	>	}
762	>	Thread t = new Thread(new Runnable() {
763	>	public void run() {
764	>	try {
765	>	lock.writeLock().lockInterruptibly();
766	>	threadShouldThrow();
767	>	}
768	>	catch(InterruptedException success) {
769	>	}
770		}
771		});
772	<	t.start();
773	<	t.interrupt();
772	>	try {
773	>	t.start();
774	>	t.interrupt();
775	>	t.join();
776	>	lock.writeLock().unlock();
777	>	} catch(Exception e){
778	>	unexpectedException();
779	>	}
780		}
781
782	<
782	>	/**
783	>	*  read lockInterruptibly succeeds if lock free else is interruptible
784	>	*/
785	>	public void testReadLockInterruptibly() {
786	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
787	>	try {
788	>	lock.writeLock().lockInterruptibly();
789	>	} catch(Exception e) {
790	>	unexpectedException();
791	>	}
792	>	Thread t = new Thread(new Runnable() {
793	>	public void run() {
794	>	try {
795	>	lock.readLock().lockInterruptibly();
796	>	threadShouldThrow();
797	>	}
798	>	catch(InterruptedException success) {
799	>	}
800	>	}
801	>	});
802	>	try {
803	>	t.start();
804	>	t.interrupt();
805	>	t.join();
806	>	lock.writeLock().unlock();
807	>	} catch(Exception e){
808	>	unexpectedException();
809	>	}
810	>	}
811
812	<	/*
813	<	* current thread locks interruptibly the thread
91	<	* another thread tries to aquire the lock and blocks
92	<	* on the call. interrupt the attempted aquireLock
93	<	* assert that the first lock() call actually locked the lock
94	<	* assert that the current thread is the one holding the lock
812	>	/**
813	>	* Calling await without holding lock throws IllegalMonitorStateException
814		*/
815	+	public void testAwait_IllegalMonitor() {
816	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817	+	final Condition c = lock.writeLock().newCondition();
818	+	try {
819	+	c.await();
820	+	shouldThrow();
821	+	}
822	+	catch (IllegalMonitorStateException success) {
823	+	}
824	+	catch (Exception ex) {
825	+	shouldThrow();
826	+	}
827	+	}
828	+
829	+	/**
830	+	* Calling signal without holding lock throws IllegalMonitorStateException
831	+	*/
832	+	public void testSignal_IllegalMonitor() {
833	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
834	+	final Condition c = lock.writeLock().newCondition();
835	+	try {
836	+	c.signal();
837	+	shouldThrow();
838	+	}
839	+	catch (IllegalMonitorStateException success) {
840	+	}
841	+	catch (Exception ex) {
842	+	unexpectedException();
843	+	}
844	+	}
845
846	<	public void testLockedInterruptibly() {
846	>	/**
847	>	* awaitNanos without a signal times out
848	>	*/
849	>	public void testAwaitNanos_Timeout() {
850	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	>	final Condition c = lock.writeLock().newCondition();
852	>	try {
853	>	lock.writeLock().lock();
854	>	long t = c.awaitNanos(100);
855	>	assertTrue(t <= 0);
856	>	lock.writeLock().unlock();
857	>	}
858	>	catch (Exception ex) {
859	>	unexpectedException();
860	>	}
861	>	}
862	>
863	>
864	>	/**
865	>	*  timed await without a signal times out
866	>	*/
867	>	public void testAwait_Timeout() {
868		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
869	<	try {lock.writeLock().lockInterruptibly();} catch(Exception e) {}
869	>	final Condition c = lock.writeLock().newCondition();
870	>	try {
871	>	lock.writeLock().lock();
872	>	lock.writeLock().unlock();
873	>	}
874	>	catch (Exception ex) {
875	>	unexpectedException();
876	>	}
877	>	}
878	>
879	>	/**
880	>	* awaitUntil without a signal times out
881	>	*/
882	>	public void testAwaitUntil_Timeout() {
883	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
884	>	final Condition c = lock.writeLock().newCondition();
885	>	try {
886	>	lock.writeLock().lock();
887	>	java.util.Date d = new java.util.Date();
888	>	lock.writeLock().unlock();
889	>	}
890	>	catch (Exception ex) {
891	>	unexpectedException();
892	>	}
893	>	}
894	>
895	>	/**
896	>	* await returns when signalled
897	>	*/
898	>	public void testAwait() {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
900	>	final Condition c = lock.writeLock().newCondition();
901		Thread t = new Thread(new Runnable() {
902		public void run() {
903		try {
904	<	lock.writeLock().lockInterruptibly();
905	<	fail("Failed to generate an Interrupted Exception");
904	>	lock.writeLock().lock();
905	>	c.await();
906	>	lock.writeLock().unlock();
907		}
908	<	catch(InterruptedException e) {}
908	>	catch(InterruptedException e) {
909	>	threadUnexpectedException();
910	>	}
911		}
912		});
913	<	t.start();
914	<	t.interrupt();
913	>
914	>	try {
915	>	t.start();
916	>	Thread.sleep(SHORT_DELAY_MS);
917	>	lock.writeLock().lock();
918	>	c.signal();
919	>	lock.writeLock().unlock();
920	>	t.join(SHORT_DELAY_MS);
921	>	assertFalse(t.isAlive());
922	>	}
923	>	catch (Exception ex) {
924	>	unexpectedException();
925	>	}
926	>	}
927	>
928	>	/** A helper class for uninterruptible wait tests */
929	>	class UninterruptableThread extends Thread {
930	>	private Lock lock;
931	>	private Condition c;
932	>
933	>	public volatile boolean canAwake = false;
934	>	public volatile boolean interrupted = false;
935	>	public volatile boolean lockStarted = false;
936	>
937	>	public UninterruptableThread(Lock lock, Condition c) {
938	>	this.lock = lock;
939	>	this.c = c;
940	>	}
941	>
942	>	public synchronized void run() {
943	>	lock.lock();
944	>	lockStarted = true;
945	>
946	>	while (!canAwake) {
947	>	c.awaitUninterruptibly();
948	>	}
949	>
950	>	interrupted = isInterrupted();
951	>	lock.unlock();
952	>	}
953	>	}
954	>
955	>	/**
956	>	* awaitUninterruptibly doesn't abort on interrupt
957	>	*/
958	>	public void testAwaitUninterruptibly() {
959	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	final Condition c = lock.writeLock().newCondition();
961	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
962	>
963	>	try {
964	>	thread.start();
965	>
966	>	while (!thread.lockStarted) {
967	>	Thread.sleep(100);
968	>	}
969	>
970	>	lock.writeLock().lock();
971	>	try {
972	>	thread.interrupt();
973	>	thread.canAwake = true;
974	>	c.signal();
975	>	} finally {
976	>	lock.writeLock().unlock();
977	>	}
978	>
979	>	thread.join();
980	>	assertTrue(thread.interrupted);
981	>	assertFalse(thread.isAlive());
982	>	} catch (Exception ex) {
983	>	unexpectedException();
984	>	}
985	>	}
986	>
987	>	/**
988	>	* await is interruptible
989	>	*/
990	>	public void testAwait_Interrupt() {
991	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
992	>	final Condition c = lock.writeLock().newCondition();
993	>	Thread t = new Thread(new Runnable() {
994	>	public void run() {
995	>	try {
996	>	lock.writeLock().lock();
997	>	c.await();
998	>	lock.writeLock().unlock();
999	>	threadShouldThrow();
1000	>	}
1001	>	catch(InterruptedException success) {
1002	>	}
1003	>	}
1004	>	});
1005	>
1006	>	try {
1007	>	t.start();
1008	>	Thread.sleep(SHORT_DELAY_MS);
1009	>	t.interrupt();
1010	>	t.join(SHORT_DELAY_MS);
1011	>	assertFalse(t.isAlive());
1012	>	}
1013	>	catch (Exception ex) {
1014	>	unexpectedException();
1015	>	}
1016	>	}
1017	>
1018	>	/**
1019	>	* awaitNanos is interruptible
1020	>	*/
1021	>	public void testAwaitNanos_Interrupt() {
1022	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1023	>	final Condition c = lock.writeLock().newCondition();
1024	>	Thread t = new Thread(new Runnable() {
1025	>	public void run() {
1026	>	try {
1027	>	lock.writeLock().lock();
1028	>	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1029	>	lock.writeLock().unlock();
1030	>	threadShouldThrow();
1031	>	}
1032	>	catch(InterruptedException success) {
1033	>	}
1034	>	}
1035	>	});
1036	>
1037	>	try {
1038	>	t.start();
1039	>	Thread.sleep(SHORT_DELAY_MS);
1040	>	t.interrupt();
1041	>	t.join(SHORT_DELAY_MS);
1042	>	assertFalse(t.isAlive());
1043	>	}
1044	>	catch (Exception ex) {
1045	>	unexpectedException();
1046	>	}
1047	>	}
1048	>
1049	>	/**
1050	>	* awaitUntil is interruptible
1051	>	*/
1052	>	public void testAwaitUntil_Interrupt() {
1053	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1054	>	final Condition c = lock.writeLock().newCondition();
1055	>	Thread t = new Thread(new Runnable() {
1056	>	public void run() {
1057	>	try {
1058	>	lock.writeLock().lock();
1059	>	java.util.Date d = new java.util.Date();
1060	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1061	>	lock.writeLock().unlock();
1062	>	threadShouldThrow();
1063	>	}
1064	>	catch(InterruptedException success) {
1065	>	}
1066	>	}
1067	>	});
1068	>
1069	>	try {
1070	>	t.start();
1071	>	Thread.sleep(SHORT_DELAY_MS);
1072	>	t.interrupt();
1073	>	t.join(SHORT_DELAY_MS);
1074	>	assertFalse(t.isAlive());
1075	>	}
1076	>	catch (Exception ex) {
1077	>	unexpectedException();
1078	>	}
1079	>	}
1080	>
1081	>	/**
1082	>	* signalAll wakes up all threads
1083	>	*/
1084	>	public void testSignalAll() {
1085	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1086	>	final Condition c = lock.writeLock().newCondition();
1087	>	Thread t1 = new Thread(new Runnable() {
1088	>	public void run() {
1089	>	try {
1090	>	lock.writeLock().lock();
1091	>	c.await();
1092	>	lock.writeLock().unlock();
1093	>	}
1094	>	catch(InterruptedException e) {
1095	>	threadUnexpectedException();
1096	>	}
1097	>	}
1098	>	});
1099	>
1100	>	Thread t2 = new Thread(new Runnable() {
1101	>	public void run() {
1102	>	try {
1103	>	lock.writeLock().lock();
1104	>	c.await();
1105	>	lock.writeLock().unlock();
1106	>	}
1107	>	catch(InterruptedException e) {
1108	>	threadUnexpectedException();
1109	>	}
1110	>	}
1111	>	});
1112	>
1113	>	try {
1114	>	t1.start();
1115	>	t2.start();
1116	>	Thread.sleep(SHORT_DELAY_MS);
1117	>	lock.writeLock().lock();
1118	>	c.signalAll();
1119	>	lock.writeLock().unlock();
1120	>	t1.join(SHORT_DELAY_MS);
1121	>	t2.join(SHORT_DELAY_MS);
1122	>	assertFalse(t1.isAlive());
1123	>	assertFalse(t2.isAlive());
1124	>	}
1125	>	catch (Exception ex) {
1126	>	unexpectedException();
1127	>	}
1128	>	}
1129	>
1130	>	/**
1131	>	* A serialized lock deserializes as unlocked
1132	>	*/
1133	>	public void testSerialization() {
1134	>	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1135	>	l.readLock().lock();
1136	>	l.readLock().unlock();
1137	>
1138	>	try {
1139	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1140	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1141	>	out.writeObject(l);
1142	>	out.close();
1143	>
1144	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1145	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1146	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1147	>	r.readLock().lock();
1148	>	r.readLock().unlock();
1149	>	} catch(Exception e){
1150	>	e.printStackTrace();
1151	>	unexpectedException();
1152	>	}
1153	>	}
1154	>
1155	>	/**
1156	>	* hasQueuedThreads reports whether there are waiting threads
1157	>	*/
1158	>	public void testhasQueuedThreads() {
1159	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1160	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1161	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1162	>	try {
1163	>	assertFalse(lock.hasQueuedThreads());
1164	>	lock.writeLock().lock();
1165	>	t1.start();
1166	>	Thread.sleep(SHORT_DELAY_MS);
1167	>	assertTrue(lock.hasQueuedThreads());
1168	>	t2.start();
1169	>	Thread.sleep(SHORT_DELAY_MS);
1170	>	assertTrue(lock.hasQueuedThreads());
1171	>	t1.interrupt();
1172	>	Thread.sleep(SHORT_DELAY_MS);
1173	>	assertTrue(lock.hasQueuedThreads());
1174	>	lock.writeLock().unlock();
1175	>	Thread.sleep(SHORT_DELAY_MS);
1176	>	assertFalse(lock.hasQueuedThreads());
1177	>	t1.join();
1178	>	t2.join();
1179	>	} catch(Exception e){
1180	>	unexpectedException();
1181	>	}
1182	>	}
1183	>
1184	>	/**
1185	>	* hasQueuedThread(null) throws NPE
1186	>	*/
1187	>	public void testHasQueuedThreadNPE() {
1188	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1189	>	try {
1190	>	sync.hasQueuedThread(null);
1191	>	shouldThrow();
1192	>	} catch (NullPointerException success) {
1193	>	}
1194	>	}
1195	>
1196	>	/**
1197	>	* hasQueuedThread reports whether a thread is queued.
1198	>	*/
1199	>	public void testHasQueuedThread() {
1200	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1201	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1202	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1203	>	try {
1204	>	assertFalse(sync.hasQueuedThread(t1));
1205	>	assertFalse(sync.hasQueuedThread(t2));
1206	>	sync.writeLock().lock();
1207	>	t1.start();
1208	>	Thread.sleep(SHORT_DELAY_MS);
1209	>	assertTrue(sync.hasQueuedThread(t1));
1210	>	t2.start();
1211	>	Thread.sleep(SHORT_DELAY_MS);
1212	>	assertTrue(sync.hasQueuedThread(t1));
1213	>	assertTrue(sync.hasQueuedThread(t2));
1214	>	t1.interrupt();
1215	>	Thread.sleep(SHORT_DELAY_MS);
1216	>	assertFalse(sync.hasQueuedThread(t1));
1217	>	assertTrue(sync.hasQueuedThread(t2));
1218	>	sync.writeLock().unlock();
1219	>	Thread.sleep(SHORT_DELAY_MS);
1220	>	assertFalse(sync.hasQueuedThread(t1));
1221	>	Thread.sleep(SHORT_DELAY_MS);
1222	>	assertFalse(sync.hasQueuedThread(t2));
1223	>	t1.join();
1224	>	t2.join();
1225	>	} catch(Exception e){
1226	>	unexpectedException();
1227	>	}
1228	>	}
1229	>
1230	>
1231	>	/**
1232	>	* getQueueLength reports number of waiting threads
1233	>	*/
1234	>	public void testGetQueueLength() {
1235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1236	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1237	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1238	>	try {
1239	>	assertEquals(0, lock.getQueueLength());
1240	>	lock.writeLock().lock();
1241	>	t1.start();
1242	>	Thread.sleep(SHORT_DELAY_MS);
1243	>	assertEquals(1, lock.getQueueLength());
1244	>	t2.start();
1245	>	Thread.sleep(SHORT_DELAY_MS);
1246	>	assertEquals(2, lock.getQueueLength());
1247	>	t1.interrupt();
1248	>	Thread.sleep(SHORT_DELAY_MS);
1249	>	assertEquals(1, lock.getQueueLength());
1250	>	lock.writeLock().unlock();
1251	>	Thread.sleep(SHORT_DELAY_MS);
1252	>	assertEquals(0, lock.getQueueLength());
1253	>	t1.join();
1254	>	t2.join();
1255	>	} catch(Exception e){
1256	>	unexpectedException();
1257	>	}
1258	>	}
1259	>
1260	>	/**
1261	>	* getQueuedThreads includes waiting threads
1262	>	*/
1263	>	public void testGetQueuedThreads() {
1264	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1265	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1266	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1267	>	try {
1268	>	assertTrue(lock.getQueuedThreads().isEmpty());
1269	>	lock.writeLock().lock();
1270	>	assertTrue(lock.getQueuedThreads().isEmpty());
1271	>	t1.start();
1272	>	Thread.sleep(SHORT_DELAY_MS);
1273	>	assertTrue(lock.getQueuedThreads().contains(t1));
1274	>	t2.start();
1275	>	Thread.sleep(SHORT_DELAY_MS);
1276	>	assertTrue(lock.getQueuedThreads().contains(t1));
1277	>	assertTrue(lock.getQueuedThreads().contains(t2));
1278	>	t1.interrupt();
1279	>	Thread.sleep(SHORT_DELAY_MS);
1280	>	assertFalse(lock.getQueuedThreads().contains(t1));
1281	>	assertTrue(lock.getQueuedThreads().contains(t2));
1282	>	lock.writeLock().unlock();
1283	>	Thread.sleep(SHORT_DELAY_MS);
1284	>	assertTrue(lock.getQueuedThreads().isEmpty());
1285	>	t1.join();
1286	>	t2.join();
1287	>	} catch(Exception e){
1288	>	unexpectedException();
1289	>	}
1290	>	}
1291	>
1292	>	/**
1293	>	* hasWaiters throws NPE if null
1294	>	*/
1295	>	public void testHasWaitersNPE() {
1296	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1297	>	try {
1298	>	lock.hasWaiters(null);
1299	>	shouldThrow();
1300	>	} catch (NullPointerException success) {
1301	>	} catch (Exception ex) {
1302	>	unexpectedException();
1303	>	}
1304	>	}
1305	>
1306	>	/**
1307	>	* getWaitQueueLength throws NPE if null
1308	>	*/
1309	>	public void testGetWaitQueueLengthNPE() {
1310	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1311	>	try {
1312	>	lock.getWaitQueueLength(null);
1313	>	shouldThrow();
1314	>	} catch (NullPointerException success) {
1315	>	} catch (Exception ex) {
1316	>	unexpectedException();
1317	>	}
1318	>	}
1319	>
1320	>
1321	>	/**
1322	>	* getWaitingThreads throws NPE if null
1323	>	*/
1324	>	public void testGetWaitingThreadsNPE() {
1325	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1326	>	try {
1327	>	lock.getWaitingThreads(null);
1328	>	shouldThrow();
1329	>	} catch (NullPointerException success) {
1330	>	} catch (Exception ex) {
1331	>	unexpectedException();
1332	>	}
1333	>	}
1334	>
1335	>	/**
1336	>	* hasWaiters throws IAE if not owned
1337	>	*/
1338	>	public void testHasWaitersIAE() {
1339	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1340	>	final Condition c = (lock.writeLock().newCondition());
1341	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1342	>	try {
1343	>	lock2.hasWaiters(c);
1344	>	shouldThrow();
1345	>	} catch (IllegalArgumentException success) {
1346	>	} catch (Exception ex) {
1347	>	unexpectedException();
1348	>	}
1349	>	}
1350	>
1351	>	/**
1352	>	* hasWaiters throws IMSE if not locked
1353	>	*/
1354	>	public void testHasWaitersIMSE() {
1355	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1356	>	final Condition c = (lock.writeLock().newCondition());
1357	>	try {
1358	>	lock.hasWaiters(c);
1359	>	shouldThrow();
1360	>	} catch (IllegalMonitorStateException success) {
1361	>	} catch (Exception ex) {
1362	>	unexpectedException();
1363	>	}
1364	>	}
1365	>
1366	>
1367	>	/**
1368	>	* getWaitQueueLength throws IAE if not owned
1369	>	*/
1370	>	public void testGetWaitQueueLengthIAE() {
1371	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1372	>	final Condition c = (lock.writeLock().newCondition());
1373	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1374	>	try {
1375	>	lock2.getWaitQueueLength(c);
1376	>	shouldThrow();
1377	>	} catch (IllegalArgumentException success) {
1378	>	} catch (Exception ex) {
1379	>	unexpectedException();
1380	>	}
1381	>	}
1382	>
1383	>	/**
1384	>	* getWaitQueueLength throws IMSE if not locked
1385	>	*/
1386	>	public void testGetWaitQueueLengthIMSE() {
1387	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1388	>	final Condition c = (lock.writeLock().newCondition());
1389	>	try {
1390	>	lock.getWaitQueueLength(c);
1391	>	shouldThrow();
1392	>	} catch (IllegalMonitorStateException success) {
1393	>	} catch (Exception ex) {
1394	>	unexpectedException();
1395	>	}
1396	>	}
1397	>
1398	>
1399	>	/**
1400	>	* getWaitingThreads throws IAE if not owned
1401	>	*/
1402	>	public void testGetWaitingThreadsIAE() {
1403	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1404	>	final Condition c = (lock.writeLock().newCondition());
1405	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1406	>	try {
1407	>	lock2.getWaitingThreads(c);
1408	>	shouldThrow();
1409	>	} catch (IllegalArgumentException success) {
1410	>	} catch (Exception ex) {
1411	>	unexpectedException();
1412	>	}
1413	>	}
1414	>
1415	>	/**
1416	>	* getWaitingThreads throws IMSE if not locked
1417	>	*/
1418	>	public void testGetWaitingThreadsIMSE() {
1419	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1420	>	final Condition c = (lock.writeLock().newCondition());
1421	>	try {
1422	>	lock.getWaitingThreads(c);
1423	>	shouldThrow();
1424	>	} catch (IllegalMonitorStateException success) {
1425	>	} catch (Exception ex) {
1426	>	unexpectedException();
1427	>	}
1428	>	}
1429	>
1430	>
1431	>	/**
1432	>	* hasWaiters returns true when a thread is waiting, else false
1433	>	*/
1434	>	public void testHasWaiters() {
1435	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1436	>	final Condition c = (lock.writeLock().newCondition());
1437	>	Thread t = new Thread(new Runnable() {
1438	>	public void run() {
1439	>	try {
1440	>	lock.writeLock().lock();
1441	>	threadAssertFalse(lock.hasWaiters(c));
1442	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1443	>	c.await();
1444	>	lock.writeLock().unlock();
1445	>	}
1446	>	catch(InterruptedException e) {
1447	>	threadUnexpectedException();
1448	>	}
1449	>	}
1450	>	});
1451	>
1452	>	try {
1453	>	t.start();
1454	>	Thread.sleep(SHORT_DELAY_MS);
1455	>	lock.writeLock().lock();
1456	>	assertTrue(lock.hasWaiters(c));
1457	>	assertEquals(1, lock.getWaitQueueLength(c));
1458	>	c.signal();
1459	>	lock.writeLock().unlock();
1460	>	Thread.sleep(SHORT_DELAY_MS);
1461	>	lock.writeLock().lock();
1462	>	assertFalse(lock.hasWaiters(c));
1463	>	assertEquals(0, lock.getWaitQueueLength(c));
1464	>	lock.writeLock().unlock();
1465	>	t.join(SHORT_DELAY_MS);
1466	>	assertFalse(t.isAlive());
1467	>	}
1468	>	catch (Exception ex) {
1469	>	unexpectedException();
1470	>	}
1471	>	}
1472	>
1473	>	/**
1474	>	* getWaitQueueLength returns number of waiting threads
1475	>	*/
1476	>	public void testGetWaitQueueLength() {
1477	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1478	>	final Condition c = (lock.writeLock().newCondition());
1479	>	Thread t = new Thread(new Runnable() {
1480	>	public void run() {
1481	>	try {
1482	>	lock.writeLock().lock();
1483	>	threadAssertFalse(lock.hasWaiters(c));
1484	>	threadAssertEquals(0, lock.getWaitQueueLength(c));
1485	>	c.await();
1486	>	lock.writeLock().unlock();
1487	>	}
1488	>	catch(InterruptedException e) {
1489	>	threadUnexpectedException();
1490	>	}
1491	>	}
1492	>	});
1493	>
1494	>	try {
1495	>	t.start();
1496	>	Thread.sleep(SHORT_DELAY_MS);
1497	>	lock.writeLock().lock();
1498	>	assertTrue(lock.hasWaiters(c));
1499	>	assertEquals(1, lock.getWaitQueueLength(c));
1500	>	c.signal();
1501	>	lock.writeLock().unlock();
1502	>	Thread.sleep(SHORT_DELAY_MS);
1503	>	lock.writeLock().lock();
1504	>	assertFalse(lock.hasWaiters(c));
1505	>	assertEquals(0, lock.getWaitQueueLength(c));
1506	>	lock.writeLock().unlock();
1507	>	t.join(SHORT_DELAY_MS);
1508	>	assertFalse(t.isAlive());
1509	>	}
1510	>	catch (Exception ex) {
1511	>	unexpectedException();
1512	>	}
1513	>	}
1514	>
1515	>
1516	>	/**
1517	>	* getWaitingThreads returns only and all waiting threads
1518	>	*/
1519	>	public void testGetWaitingThreads() {
1520	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1521	>	final Condition c = lock.writeLock().newCondition();
1522	>	Thread t1 = new Thread(new Runnable() {
1523	>	public void run() {
1524	>	try {
1525	>	lock.writeLock().lock();
1526	>	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1527	>	c.await();
1528	>	lock.writeLock().unlock();
1529	>	}
1530	>	catch(InterruptedException e) {
1531	>	threadUnexpectedException();
1532	>	}
1533	>	}
1534	>	});
1535	>
1536	>	Thread t2 = new Thread(new Runnable() {
1537	>	public void run() {
1538	>	try {
1539	>	lock.writeLock().lock();
1540	>	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1541	>	c.await();
1542	>	lock.writeLock().unlock();
1543	>	}
1544	>	catch(InterruptedException e) {
1545	>	threadUnexpectedException();
1546	>	}
1547	>	}
1548	>	});
1549	>
1550	>	try {
1551	>	lock.writeLock().lock();
1552	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1553	>	lock.writeLock().unlock();
1554	>	t1.start();
1555	>	Thread.sleep(SHORT_DELAY_MS);
1556	>	t2.start();
1557	>	Thread.sleep(SHORT_DELAY_MS);
1558	>	lock.writeLock().lock();
1559	>	assertTrue(lock.hasWaiters(c));
1560	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1561	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1562	>	c.signalAll();
1563	>	lock.writeLock().unlock();
1564	>	Thread.sleep(SHORT_DELAY_MS);
1565	>	lock.writeLock().lock();
1566	>	assertFalse(lock.hasWaiters(c));
1567	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1568	>	lock.writeLock().unlock();
1569	>	t1.join(SHORT_DELAY_MS);
1570	>	t2.join(SHORT_DELAY_MS);
1571	>	assertFalse(t1.isAlive());
1572	>	assertFalse(t2.isAlive());
1573	>	}
1574	>	catch (Exception ex) {
1575	>	unexpectedException();
1576	>	}
1577	>	}
1578	>
1579	>	/**
1580	>	* toString indicates current lock state
1581	>	*/
1582	>	public void testToString() {
1583	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1584	>	String us = lock.toString();
1585	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1586	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1587	>	lock.writeLock().lock();
1588	>	String ws = lock.toString();
1589	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1590	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1591	>	lock.writeLock().unlock();
1592	>	lock.readLock().lock();
1593	>	lock.readLock().lock();
1594	>	String rs = lock.toString();
1595	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1596	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1597	>	}
1598	>
1599	>	/**
1600	>	* readLock.toString indicates current lock state
1601	>	*/
1602	>	public void testReadLockToString() {
1603	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1604	>	String us = lock.readLock().toString();
1605	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1606	>	lock.readLock().lock();
1607	>	lock.readLock().lock();
1608	>	String rs = lock.readLock().toString();
1609	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1610	>	}
1611	>
1612	>	/**
1613	>	* writeLock.toString indicates current lock state
1614	>	*/
1615	>	public void testWriteLockToString() {
1616	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1617	>	String us = lock.writeLock().toString();
1618	>	assertTrue(us.indexOf("Unlocked") >= 0);
1619	>	lock.writeLock().lock();
1620	>	String ls = lock.writeLock().toString();
1621	>	assertTrue(ls.indexOf("Locked") >= 0);
1622		}
112	–
1623
1624		}

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