ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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 1.45 by jsr166, Sun May 1 23:49:41 2011 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/publicdomain/zero/1.0/
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
13	+	import java.io.*;
14	+	import java.util.*;
15
16	<	public class ReentrantReadWriteLockTest extends TestCase {
13	<	static int HOLD_COUNT_TEST_LIMIT = 20;
14	<
16	>	public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
18	–
20		public static Test suite() {
21	<	return new TestSuite(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24	+	/**
25	+	* A runnable calling lockInterruptibly
26	+	*/
27	+	class InterruptibleLockRunnable extends CheckedRunnable {
28	+	final ReentrantReadWriteLock lock;
29	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	+	public void realRun() throws InterruptedException {
31	+	lock.writeLock().lockInterruptibly();
32	+	}
33	+	}
34	+
35	+
36	+	/**
37	+	* A runnable calling lockInterruptibly that expects to be
38	+	* interrupted
39	+	*/
40	+	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	+	final ReentrantReadWriteLock lock;
42	+	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	+	public void realRun() throws InterruptedException {
44	+	lock.writeLock().lockInterruptibly();
45	+	}
46	+	}
47	+
48	+	/**
49	+	* Subclass to expose protected methods
50	+	*/
51	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52	+	PublicReentrantReadWriteLock() { super(); }
53	+	public Collection<Thread> getQueuedThreads() {
54	+	return super.getQueuedThreads();
55	+	}
56	+	public Collection<Thread> getWaitingThreads(Condition c) {
57	+	return super.getWaitingThreads(c);
58	+	}
59	+	}
60	+
61	+	/**
62	+	* Constructor sets given fairness, and is in unlocked state
63	+	*/
64	+	public void testConstructor() {
65	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
66	+	assertFalse(rl.isFair());
67	+	assertFalse(rl.isWriteLocked());
68	+	assertEquals(0, rl.getReadLockCount());
69	+	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
70	+	assertTrue(r2.isFair());
71	+	assertFalse(r2.isWriteLocked());
72	+	assertEquals(0, r2.getReadLockCount());
73	+	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
74	+	assertFalse(r3.isFair());
75	+	assertFalse(r3.isWriteLocked());
76	+	assertEquals(0, r3.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	+	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	+	/**
106	+	* locking an unlocked fair lock succeeds
107	+	*/
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() {
180	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
181	+	try {
182	+	rl.writeLock().unlock();
183	+	shouldThrow();
184	+	} catch (IllegalMonitorStateException success) {}
185	+	}
186	+
187	+
188	+	/**
189	+	* write-lockInterruptibly is interruptible
190	+	*/
191	+	public void testWriteLockInterruptibly_Interrupted() throws Exception {
192	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
193	+	lock.writeLock().lock();
194	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
195	+	public void realRun() throws InterruptedException {
196	+	lock.writeLock().lockInterruptibly();
197	+	lock.writeLock().unlock();
198	+	lock.writeLock().lockInterruptibly();
199	+	lock.writeLock().unlock();
200	+	}});
201	+
202	+	Thread.sleep(SHORT_DELAY_MS);
203	+	t.interrupt();
204	+	Thread.sleep(SHORT_DELAY_MS);
205	+	lock.writeLock().unlock();
206	+	t.join();
207	+	}
208	+
209	+	/**
210	+	* timed write-tryLock is interruptible
211	+	*/
212	+	public void testWriteTryLock_Interrupted() throws InterruptedException {
213	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	+	lock.writeLock().lock();
215	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
216	+	public void realRun() throws InterruptedException {
217	+	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
218	+	}});
219	+
220	+	Thread.sleep(SHORT_DELAY_MS);
221	+	t.interrupt();
222	+	lock.writeLock().unlock();
223	+	t.join();
224	+	}
225	+
226	+	/**
227	+	* read-lockInterruptibly is interruptible
228	+	*/
229	+	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
230	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	+	lock.writeLock().lock();
232	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
233	+	public void realRun() throws InterruptedException {
234	+	lock.readLock().lockInterruptibly();
235	+	}});
236	+
237	+	Thread.sleep(SHORT_DELAY_MS);
238	+	t.interrupt();
239	+	Thread.sleep(SHORT_DELAY_MS);
240	+	lock.writeLock().unlock();
241	+	t.join();
242	+	}
243	+
244	+	/**
245	+	* timed read-tryLock is interruptible
246	+	*/
247	+	public void testReadTryLock_Interrupted() throws InterruptedException {
248	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	+	lock.writeLock().lock();
250	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
251	+	public void realRun() throws InterruptedException {
252	+	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
253	+	}});
254	+
255	+	Thread.sleep(SHORT_DELAY_MS);
256	+	t.interrupt();
257	+	t.join();
258	+	}
259	+
260	+
261	+	/**
262	+	* write-tryLock fails if locked
263	+	*/
264	+	public void testWriteTryLockWhenLocked() throws InterruptedException {
265	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	+	lock.writeLock().lock();
267	+	Thread t = newStartedThread(new CheckedRunnable() {
268	+	public void realRun() {
269	+	assertFalse(lock.writeLock().tryLock());
270	+	}});
271	+
272	+	t.join();
273	+	lock.writeLock().unlock();
274	+	}
275	+
276	+	/**
277	+	* read-tryLock fails if locked
278	+	*/
279	+	public void testReadTryLockWhenLocked() throws InterruptedException {
280	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
281	+	lock.writeLock().lock();
282	+	Thread t = newStartedThread(new CheckedRunnable() {
283	+	public void realRun() {
284	+	assertFalse(lock.readLock().tryLock());
285	+	}});
286	+
287	+	t.join();
288	+	lock.writeLock().unlock();
289	+	}
290	+
291	+	/**
292	+	* Multiple threads can hold a read lock when not write-locked
293	+	*/
294	+	public void testMultipleReadLocks() throws InterruptedException {
295	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	+	lock.readLock().lock();
297	+	Thread t = newStartedThread(new CheckedRunnable() {
298	+	public void realRun() {
299	+	assertTrue(lock.readLock().tryLock());
300	+	lock.readLock().unlock();
301	+	}});
302	+
303	+	t.join();
304	+	lock.readLock().unlock();
305	+	}
306	+
307	+	/**
308	+	* A writelock succeeds after reading threads unlock
309	+	*/
310	+	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
311	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
312	+	lock.readLock().lock();
313	+	Thread t1 = newStartedThread(new CheckedRunnable() {
314	+	public void realRun() {
315	+	lock.readLock().lock();
316	+	lock.readLock().unlock();
317	+	}});
318	+	Thread t2 = newStartedThread(new CheckedRunnable() {
319	+	public void realRun() {
320	+	lock.writeLock().lock();
321	+	lock.writeLock().unlock();
322	+	}});
323	+
324	+	Thread.sleep(SHORT_DELAY_MS);
325	+	lock.readLock().unlock();
326	+	t1.join(MEDIUM_DELAY_MS);
327	+	t2.join(MEDIUM_DELAY_MS);
328	+	assertTrue(!t1.isAlive());
329	+	assertTrue(!t2.isAlive());
330	+	}
331	+
332	+	/**
333	+	* Readlocks succeed after a writing thread unlocks
334	+	*/
335	+	public void testReadAfterWriteLock() throws InterruptedException {
336	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337	+	lock.writeLock().lock();
338	+	Thread t1 = newStartedThread(new CheckedRunnable() {
339	+	public void realRun() {
340	+	lock.readLock().lock();
341	+	lock.readLock().unlock();
342	+	}});
343	+	Thread t2 = newStartedThread(new CheckedRunnable() {
344	+	public void realRun() {
345	+	lock.readLock().lock();
346	+	lock.readLock().unlock();
347	+	}});
348	+
349	+	Thread.sleep(SHORT_DELAY_MS);
350	+	lock.writeLock().unlock();
351	+	t1.join(MEDIUM_DELAY_MS);
352	+	t2.join(MEDIUM_DELAY_MS);
353	+	assertTrue(!t1.isAlive());
354	+	assertTrue(!t2.isAlive());
355	+	}
356	+
357	+	/**
358	+	* Read trylock succeeds if write locked by current thread
359	+	*/
360	+	public void testReadHoldingWriteLock() {
361	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
362	+	lock.writeLock().lock();
363	+	assertTrue(lock.readLock().tryLock());
364	+	lock.readLock().unlock();
365	+	lock.writeLock().unlock();
366	+	}
367	+
368	+	/**
369	+	* Read lock succeeds if write locked by current thread even if
370	+	* other threads are waiting for readlock
371	+	*/
372	+	public void testReadHoldingWriteLock2() throws InterruptedException {
373	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
374	+	lock.writeLock().lock();
375	+	Thread t1 = newStartedThread(new CheckedRunnable() {
376	+	public void realRun() {
377	+	lock.readLock().lock();
378	+	lock.readLock().unlock();
379	+	}});
380	+	Thread t2 = newStartedThread(new CheckedRunnable() {
381	+	public void realRun() {
382	+	lock.readLock().lock();
383	+	lock.readLock().unlock();
384	+	}});
385	+
386	+	lock.readLock().lock();
387	+	lock.readLock().unlock();
388	+	Thread.sleep(SHORT_DELAY_MS);
389	+	lock.readLock().lock();
390	+	lock.readLock().unlock();
391	+	lock.writeLock().unlock();
392	+	t1.join(MEDIUM_DELAY_MS);
393	+	t2.join(MEDIUM_DELAY_MS);
394	+	assertTrue(!t1.isAlive());
395	+	assertTrue(!t2.isAlive());
396	+	}
397	+
398	+	/**
399	+	* Read lock succeeds if write locked by current thread even if
400	+	* other threads are waiting for writelock
401	+	*/
402	+	public void testReadHoldingWriteLock3() throws InterruptedException {
403	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	+	lock.writeLock().lock();
405	+	Thread t1 = newStartedThread(new CheckedRunnable() {
406	+	public void realRun() {
407	+	lock.writeLock().lock();
408	+	lock.writeLock().unlock();
409	+	}});
410	+	Thread t2 = newStartedThread(new CheckedRunnable() {
411	+	public void realRun() {
412	+	lock.writeLock().lock();
413	+	lock.writeLock().unlock();
414	+	}});
415	+
416	+	lock.readLock().lock();
417	+	lock.readLock().unlock();
418	+	Thread.sleep(SHORT_DELAY_MS);
419	+	lock.readLock().lock();
420	+	lock.readLock().unlock();
421	+	lock.writeLock().unlock();
422	+	t1.join(MEDIUM_DELAY_MS);
423	+	t2.join(MEDIUM_DELAY_MS);
424	+	assertTrue(!t1.isAlive());
425	+	assertTrue(!t2.isAlive());
426	+	}
427	+
428	+
429	+	/**
430	+	* Write lock succeeds if write locked by current thread even if
431	+	* other threads are waiting for writelock
432	+	*/
433	+	public void testWriteHoldingWriteLock4() throws InterruptedException {
434	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
435	+	lock.writeLock().lock();
436	+	Thread t1 = newStartedThread(new CheckedRunnable() {
437	+	public void realRun() {
438	+	lock.writeLock().lock();
439	+	lock.writeLock().unlock();
440	+	}});
441	+	Thread t2 = newStartedThread(new CheckedRunnable() {
442	+	public void realRun() {
443	+	lock.writeLock().lock();
444	+	lock.writeLock().unlock();
445	+	}});
446	+
447	+	lock.writeLock().lock();
448	+	lock.writeLock().unlock();
449	+	Thread.sleep(SHORT_DELAY_MS);
450	+	lock.writeLock().lock();
451	+	lock.writeLock().unlock();
452	+	lock.writeLock().unlock();
453	+	t1.join(MEDIUM_DELAY_MS);
454	+	t2.join(MEDIUM_DELAY_MS);
455	+	assertTrue(!t1.isAlive());
456	+	assertTrue(!t2.isAlive());
457	+	}
458	+
459	+
460	+	/**
461	+	* Fair Read trylock succeeds if write locked by current thread
462	+	*/
463	+	public void testReadHoldingWriteLockFair() {
464	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
465	+	lock.writeLock().lock();
466	+	assertTrue(lock.readLock().tryLock());
467	+	lock.readLock().unlock();
468	+	lock.writeLock().unlock();
469	+	}
470	+
471	+	/**
472	+	* Fair Read lock succeeds if write locked by current thread even if
473	+	* other threads are waiting for readlock
474	+	*/
475	+	public void testReadHoldingWriteLockFair2() throws InterruptedException {
476	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
477	+	lock.writeLock().lock();
478	+	Thread t1 = newStartedThread(new CheckedRunnable() {
479	+	public void realRun() {
480	+	lock.readLock().lock();
481	+	lock.readLock().unlock();
482	+	}});
483	+	Thread t2 = newStartedThread(new CheckedRunnable() {
484	+	public void realRun() {
485	+	lock.readLock().lock();
486	+	lock.readLock().unlock();
487	+	}});
488	+
489	+	lock.readLock().lock();
490	+	lock.readLock().unlock();
491	+	Thread.sleep(SHORT_DELAY_MS);
492	+	lock.readLock().lock();
493	+	lock.readLock().unlock();
494	+	lock.writeLock().unlock();
495	+	t1.join(MEDIUM_DELAY_MS);
496	+	t2.join(MEDIUM_DELAY_MS);
497	+	assertTrue(!t1.isAlive());
498	+	assertTrue(!t2.isAlive());
499	+	}
500	+
501	+
502	+	/**
503	+	* Fair Read lock succeeds if write locked by current thread even if
504	+	* other threads are waiting for writelock
505	+	*/
506	+	public void testReadHoldingWriteLockFair3() throws InterruptedException {
507	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
508	+	lock.writeLock().lock();
509	+	Thread t1 = newStartedThread(new CheckedRunnable() {
510	+	public void realRun() {
511	+	lock.writeLock().lock();
512	+	lock.writeLock().unlock();
513	+	}});
514	+	Thread t2 = newStartedThread(new CheckedRunnable() {
515	+	public void realRun() {
516	+	lock.writeLock().lock();
517	+	lock.writeLock().unlock();
518	+	}});
519	+
520	+	lock.readLock().lock();
521	+	lock.readLock().unlock();
522	+	Thread.sleep(SHORT_DELAY_MS);
523	+	lock.readLock().lock();
524	+	lock.readLock().unlock();
525	+	lock.writeLock().unlock();
526	+	t1.join(MEDIUM_DELAY_MS);
527	+	t2.join(MEDIUM_DELAY_MS);
528	+	assertTrue(!t1.isAlive());
529	+	assertTrue(!t2.isAlive());
530	+	}
531	+
532	+
533	+	/**
534	+	* Fair Write lock succeeds if write locked by current thread even if
535	+	* other threads are waiting for writelock
536	+	*/
537	+	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
538	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
539	+	lock.writeLock().lock();
540	+	Thread t1 = newStartedThread(new CheckedRunnable() {
541	+	public void realRun() {
542	+	lock.writeLock().lock();
543	+	lock.writeLock().unlock();
544	+	}});
545	+	Thread t2 = newStartedThread(new CheckedRunnable() {
546	+	public void realRun() {
547	+	lock.writeLock().lock();
548	+	lock.writeLock().unlock();
549	+	}});
550	+
551	+	Thread.sleep(SHORT_DELAY_MS);
552	+	assertTrue(lock.isWriteLockedByCurrentThread());
553	+	assertEquals(1, lock.getWriteHoldCount());
554	+	lock.writeLock().lock();
555	+	assertEquals(2, lock.getWriteHoldCount());
556	+	lock.writeLock().unlock();
557	+	lock.writeLock().lock();
558	+	lock.writeLock().unlock();
559	+	lock.writeLock().unlock();
560	+	t1.join(MEDIUM_DELAY_MS);
561	+	t2.join(MEDIUM_DELAY_MS);
562	+	assertTrue(!t1.isAlive());
563	+	assertTrue(!t2.isAlive());
564	+	}
565	+
566	+
567	+	/**
568	+	* Read tryLock succeeds if readlocked but not writelocked
569	+	*/
570	+	public void testTryLockWhenReadLocked() throws InterruptedException {
571	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
572	+	lock.readLock().lock();
573	+	Thread t = newStartedThread(new CheckedRunnable() {
574	+	public void realRun() {
575	+	assertTrue(lock.readLock().tryLock());
576	+	lock.readLock().unlock();
577	+	}});
578	+
579	+	t.join();
580	+	lock.readLock().unlock();
581	+	}
582	+
583	+	/**
584	+	* write tryLock fails when readlocked
585	+	*/
586	+	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
587	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	+	lock.readLock().lock();
589	+	Thread t = newStartedThread(new CheckedRunnable() {
590	+	public void realRun() {
591	+	assertFalse(lock.writeLock().tryLock());
592	+	}});
593	+
594	+	t.join();
595	+	lock.readLock().unlock();
596	+	}
597	+
598	+
599	+	/**
600	+	* Fair Read tryLock succeeds if readlocked but not writelocked
601	+	*/
602	+	public void testTryLockWhenReadLockedFair() throws InterruptedException {
603	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
604	+	lock.readLock().lock();
605	+	Thread t = newStartedThread(new CheckedRunnable() {
606	+	public void realRun() {
607	+	assertTrue(lock.readLock().tryLock());
608	+	lock.readLock().unlock();
609	+	}});
610	+
611	+	t.join();
612	+	lock.readLock().unlock();
613	+	}
614	+
615	+
616	+
617	+	/**
618	+	* Fair write tryLock fails when readlocked
619	+	*/
620	+	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
621	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
622	+	lock.readLock().lock();
623	+	Thread t = newStartedThread(new CheckedRunnable() {
624	+	public void realRun() {
625	+	assertFalse(lock.writeLock().tryLock());
626	+	}});
627	+
628	+	t.join();
629	+	lock.readLock().unlock();
630	+	}
631	+
632	+
633	+
634	+	/**
635	+	* write timed tryLock times out if locked
636	+	*/
637	+	public void testWriteTryLock_Timeout() throws InterruptedException {
638	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
639	+	lock.writeLock().lock();
640	+	Thread t = newStartedThread(new CheckedRunnable() {
641	+	public void realRun() throws InterruptedException {
642	+	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
643	+	}});
644	+
645	+	t.join();
646	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
647	+	lock.writeLock().unlock();
648	+	}
649	+
650	+	/**
651	+	* read timed tryLock times out if write-locked
652	+	*/
653	+	public void testReadTryLock_Timeout() throws InterruptedException {
654	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
655	+	lock.writeLock().lock();
656	+	Thread t = newStartedThread(new CheckedRunnable() {
657	+	public void realRun() throws InterruptedException {
658	+	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
659	+	}});
660	+
661	+	t.join();
662	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
663	+	lock.writeLock().unlock();
664	+	}
665
666	<	private static long SHORT_DELAY_MS = 100;
667	<	private static long MEDIUM_DELAY_MS = 1000;
668	<	private static long LONG_DELAY_MS = 10000;
669	<
670	<	/*
671	<	* Unlocks an unlocked lock, throws Illegal Monitor State
672	<	*
673	<	*/
674	<
675	<	public void testIllegalMonitorStateException(){
676	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
677	<	try{
678	<	rl.writeLock().unlock();
679	<	fail("Should of thown Illegal Monitor State Exception");
680	<
681	<	}catch(IllegalMonitorStateException sucess){}
682	<
683	<
684	<	}
685	<
686	<	/*
687	<	* makes a lock, locks it, tries to aquire the lock in another thread
688	<	* interrupts that thread and waits for an interrupted Exception to
689	<	* be thrown.
690	<	*/
691	<
692	<	public void testInterruptedException(){
693	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
694	<	lock.writeLock().lock();
695	<	Thread t = new Thread(new Runnable() {
696	<	public void run(){
697	<	try{
698	<	lock.writeLock().lockInterruptibly();
699	<	fail("should throw");
700	<	}catch(InterruptedException sucess){}
701	<	}
702	<	});
703	<	t.start();
704	<	t.interrupt();
705	<	lock.writeLock().unlock();
706	<	}
707	<
708	<	/*
709	<	* tests for interrupted exception on a timed wait
710	<	*
711	<	*/
712	<
713	<
714	<	public void testInterruptedException2(){
715	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
716	<	lock.writeLock().lock();
717	<	Thread t = new Thread(new Runnable() {
718	<	public void run(){
719	<	try{
720	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
721	<	fail("should throw");
722	<	}catch(InterruptedException sucess){}
723	<	}
724	<	});
725	<	t.start();
726	<	t.interrupt();
727	<	}
728	<
729	<
730	<
731	<	/*
732	<	* current thread locks interruptibly the thread
733	<	* another thread tries to aquire the lock and blocks
734	<	* on the call. interrupt the attempted aquireLock
735	<	* assert that the first lock() call actually locked the lock
736	<	* assert that the current thread is the one holding the lock
737	<	*/
738	<
739	<	public void testLockedInterruptibly() {
740	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
741	<	try {lock.writeLock().lockInterruptibly();} catch(Exception e) {}
742	<	Thread t = new Thread(new Runnable() {
743	<	public void run() {
744	<	try {
745	<	lock.writeLock().lockInterruptibly();
746	<	fail("Failed to generate an Interrupted Exception");
747	<	}
748	<	catch(InterruptedException e) {}
749	<	}
750	<	});
751	<	t.start();
752	<	t.interrupt();
666	>
667	>	/**
668	>	* write lockInterruptibly succeeds if lock free else is interruptible
669	>	*/
670	>	public void testWriteLockInterruptibly() throws InterruptedException {
671	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
672	>	lock.writeLock().lockInterruptibly();
673	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	lock.writeLock().lockInterruptibly();
676	>	}});
677	>
678	>	Thread.sleep(SHORT_DELAY_MS);
679	>	t.interrupt();
680	>	Thread.sleep(SHORT_DELAY_MS);
681	>	t.join();
682	>	lock.writeLock().unlock();
683	>	}
684	>
685	>	/**
686	>	* read lockInterruptibly succeeds if lock free else is interruptible
687	>	*/
688	>	public void testReadLockInterruptibly() throws InterruptedException {
689	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
690	>	lock.writeLock().lockInterruptibly();
691	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
692	>	public void realRun() throws InterruptedException {
693	>	lock.readLock().lockInterruptibly();
694	>	}});
695	>
696	>	Thread.sleep(SHORT_DELAY_MS);
697	>	t.interrupt();
698	>	t.join();
699	>	lock.writeLock().unlock();
700	>	}
701	>
702	>	/**
703	>	* Calling await without holding lock throws IllegalMonitorStateException
704	>	*/
705	>	public void testAwait_IllegalMonitor() throws InterruptedException {
706	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
707	>	final Condition c = lock.writeLock().newCondition();
708	>	try {
709	>	c.await();
710	>	shouldThrow();
711	>	} catch (IllegalMonitorStateException success) {}
712	>	}
713	>
714	>	/**
715	>	* Calling signal without holding lock throws IllegalMonitorStateException
716	>	*/
717	>	public void testSignal_IllegalMonitor() {
718	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
719	>	final Condition c = lock.writeLock().newCondition();
720	>	try {
721	>	c.signal();
722	>	shouldThrow();
723	>	} catch (IllegalMonitorStateException success) {}
724	>	}
725	>
726	>	/**
727	>	* awaitNanos without a signal times out
728	>	*/
729	>	public void testAwaitNanos_Timeout() throws InterruptedException {
730	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
731	>	final Condition c = lock.writeLock().newCondition();
732	>
733	>	lock.writeLock().lock();
734	>	long t = c.awaitNanos(100);
735	>	assertTrue(t <= 0);
736	>	lock.writeLock().unlock();
737	>	}
738	>
739	>
740	>	/**
741	>	* timed await without a signal times out
742	>	*/
743	>	public void testAwait_Timeout() throws InterruptedException {
744	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
745	>	final Condition c = lock.writeLock().newCondition();
746	>	lock.writeLock().lock();
747	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
748	>	lock.writeLock().unlock();
749	>	}
750	>
751	>	/**
752	>	* awaitUntil without a signal times out
753	>	*/
754	>	public void testAwaitUntil_Timeout() throws InterruptedException {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
756	>	final Condition c = lock.writeLock().newCondition();
757	>	lock.writeLock().lock();
758	>	java.util.Date d = new java.util.Date();
759	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
760	>	lock.writeLock().unlock();
761	>	}
762	>
763	>	/**
764	>	* await returns when signalled
765	>	*/
766	>	public void testAwait() throws InterruptedException {
767	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
768	>	final Condition c = lock.writeLock().newCondition();
769	>	Thread t = newStartedThread(new CheckedRunnable() {
770	>	public void realRun() throws InterruptedException {
771	>	lock.writeLock().lock();
772	>	c.await();
773	>	lock.writeLock().unlock();
774	>	}});
775	>
776	>	Thread.sleep(SHORT_DELAY_MS);
777	>	lock.writeLock().lock();
778	>	c.signal();
779	>	lock.writeLock().unlock();
780	>	t.join(SHORT_DELAY_MS);
781	>	assertFalse(t.isAlive());
782	>	}
783	>
784	>	/** A helper class for uninterruptible wait tests */
785	>	class UninterruptableThread extends Thread {
786	>	private Lock lock;
787	>	private Condition c;
788	>
789	>	public volatile boolean canAwake = false;
790	>	public volatile boolean interrupted = false;
791	>	public volatile boolean lockStarted = false;
792	>
793	>	public UninterruptableThread(Lock lock, Condition c) {
794	>	this.lock = lock;
795	>	this.c = c;
796	>	}
797	>
798	>	public synchronized void run() {
799	>	lock.lock();
800	>	lockStarted = true;
801	>
802	>	while (!canAwake) {
803	>	c.awaitUninterruptibly();
804	>	}
805	>
806	>	interrupted = isInterrupted();
807	>	lock.unlock();
808	>	}
809	>	}
810	>
811	>	/**
812	>	* awaitUninterruptibly doesn't abort on interrupt
813	>	*/
814	>	public void testAwaitUninterruptibly() throws InterruptedException {
815	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
816	>	final Condition c = lock.writeLock().newCondition();
817	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
818	>
819	>	thread.start();
820	>
821	>	while (!thread.lockStarted) {
822	>	Thread.sleep(100);
823	>	}
824	>
825	>	lock.writeLock().lock();
826	>	try {
827	>	thread.interrupt();
828	>	thread.canAwake = true;
829	>	c.signal();
830	>	} finally {
831	>	lock.writeLock().unlock();
832	>	}
833	>
834	>	thread.join();
835	>	assertTrue(thread.interrupted);
836	>	assertFalse(thread.isAlive());
837	>	}
838	>
839	>	/**
840	>	* await is interruptible
841	>	*/
842	>	public void testAwait_Interrupt() throws InterruptedException {
843	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
844	>	final Condition c = lock.writeLock().newCondition();
845	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
846	>	public void realRun() throws InterruptedException {
847	>	lock.writeLock().lock();
848	>	c.await();
849	>	lock.writeLock().unlock();
850	>	}});
851	>
852	>	Thread.sleep(SHORT_DELAY_MS);
853	>	t.interrupt();
854	>	t.join(SHORT_DELAY_MS);
855	>	assertFalse(t.isAlive());
856	>	}
857	>
858	>	/**
859	>	* awaitNanos is interruptible
860	>	*/
861	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
862	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863	>	final Condition c = lock.writeLock().newCondition();
864	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
865	>	public void realRun() throws InterruptedException {
866	>	lock.writeLock().lock();
867	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
868	>	lock.writeLock().unlock();
869	>	}});
870	>
871	>	Thread.sleep(SHORT_DELAY_MS);
872	>	t.interrupt();
873	>	t.join(SHORT_DELAY_MS);
874	>	assertFalse(t.isAlive());
875	>	}
876	>
877	>	/**
878	>	* awaitUntil is interruptible
879	>	*/
880	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
881	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
882	>	final Condition c = lock.writeLock().newCondition();
883	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
884	>	public void realRun() throws InterruptedException {
885	>	lock.writeLock().lock();
886	>	java.util.Date d = new java.util.Date();
887	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
888	>	lock.writeLock().unlock();
889	>	}});
890	>
891	>	Thread.sleep(SHORT_DELAY_MS);
892	>	t.interrupt();
893	>	t.join(SHORT_DELAY_MS);
894	>	assertFalse(t.isAlive());
895	>	}
896	>
897	>	/**
898	>	* signalAll wakes up all threads
899	>	*/
900	>	public void testSignalAll() throws InterruptedException {
901	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	final Condition c = lock.writeLock().newCondition();
903	>	Thread t1 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() throws InterruptedException {
905	>	lock.writeLock().lock();
906	>	c.await();
907	>	lock.writeLock().unlock();
908	>	}});
909	>
910	>	Thread t2 = newStartedThread(new CheckedRunnable() {
911	>	public void realRun() throws InterruptedException {
912	>	lock.writeLock().lock();
913	>	c.await();
914	>	lock.writeLock().unlock();
915	>	}});
916	>
917	>	Thread.sleep(SHORT_DELAY_MS);
918	>	lock.writeLock().lock();
919	>	c.signalAll();
920	>	lock.writeLock().unlock();
921	>	t1.join(SHORT_DELAY_MS);
922	>	t2.join(SHORT_DELAY_MS);
923	>	assertFalse(t1.isAlive());
924	>	assertFalse(t2.isAlive());
925	>	}
926	>
927	>	/**
928	>	* A serialized lock deserializes as unlocked
929	>	*/
930	>	public void testSerialization() throws Exception {
931	>	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
932	>	l.readLock().lock();
933	>	l.readLock().unlock();
934	>
935	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
936	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
937	>	out.writeObject(l);
938	>	out.close();
939	>
940	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
941	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
942	>	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
943	>	r.readLock().lock();
944	>	r.readLock().unlock();
945	>	}
946	>
947	>	/**
948	>	* hasQueuedThreads reports whether there are waiting threads
949	>	*/
950	>	public void testhasQueuedThreads() throws InterruptedException {
951	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
952	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
953	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
954	>	assertFalse(lock.hasQueuedThreads());
955	>	lock.writeLock().lock();
956	>	t1.start();
957	>	Thread.sleep(SHORT_DELAY_MS);
958	>	assertTrue(lock.hasQueuedThreads());
959	>	t2.start();
960	>	Thread.sleep(SHORT_DELAY_MS);
961	>	assertTrue(lock.hasQueuedThreads());
962	>	t1.interrupt();
963	>	Thread.sleep(SHORT_DELAY_MS);
964	>	assertTrue(lock.hasQueuedThreads());
965	>	lock.writeLock().unlock();
966	>	Thread.sleep(SHORT_DELAY_MS);
967	>	assertFalse(lock.hasQueuedThreads());
968	>	t1.join();
969	>	t2.join();
970	>	}
971	>
972	>	/**
973	>	* hasQueuedThread(null) throws NPE
974	>	*/
975	>	public void testHasQueuedThreadNPE() {
976	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
977	>	try {
978	>	sync.hasQueuedThread(null);
979	>	shouldThrow();
980	>	} catch (NullPointerException success) {}
981	>	}
982	>
983	>	/**
984	>	* hasQueuedThread reports whether a thread is queued.
985	>	*/
986	>	public void testHasQueuedThread() throws InterruptedException {
987	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
988	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
989	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
990	>	assertFalse(sync.hasQueuedThread(t1));
991	>	assertFalse(sync.hasQueuedThread(t2));
992	>	sync.writeLock().lock();
993	>	t1.start();
994	>	Thread.sleep(SHORT_DELAY_MS);
995	>	assertTrue(sync.hasQueuedThread(t1));
996	>	t2.start();
997	>	Thread.sleep(SHORT_DELAY_MS);
998	>	assertTrue(sync.hasQueuedThread(t1));
999	>	assertTrue(sync.hasQueuedThread(t2));
1000	>	t1.interrupt();
1001	>	Thread.sleep(SHORT_DELAY_MS);
1002	>	assertFalse(sync.hasQueuedThread(t1));
1003	>	assertTrue(sync.hasQueuedThread(t2));
1004	>	sync.writeLock().unlock();
1005	>	Thread.sleep(SHORT_DELAY_MS);
1006	>	assertFalse(sync.hasQueuedThread(t1));
1007	>	Thread.sleep(SHORT_DELAY_MS);
1008	>	assertFalse(sync.hasQueuedThread(t2));
1009	>	t1.join();
1010	>	t2.join();
1011	>	}
1012	>
1013	>
1014	>	/**
1015	>	* getQueueLength reports number of waiting threads
1016	>	*/
1017	>	public void testGetQueueLength() throws InterruptedException {
1018	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1019	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1020	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1021	>	assertEquals(0, lock.getQueueLength());
1022	>	lock.writeLock().lock();
1023	>	t1.start();
1024	>	Thread.sleep(SHORT_DELAY_MS);
1025	>	assertEquals(1, lock.getQueueLength());
1026	>	t2.start();
1027	>	Thread.sleep(SHORT_DELAY_MS);
1028	>	assertEquals(2, lock.getQueueLength());
1029	>	t1.interrupt();
1030	>	Thread.sleep(SHORT_DELAY_MS);
1031	>	assertEquals(1, lock.getQueueLength());
1032	>	lock.writeLock().unlock();
1033	>	Thread.sleep(SHORT_DELAY_MS);
1034	>	assertEquals(0, lock.getQueueLength());
1035	>	t1.join();
1036	>	t2.join();
1037	>	}
1038	>
1039	>	/**
1040	>	* getQueuedThreads includes waiting threads
1041	>	*/
1042	>	public void testGetQueuedThreads() throws InterruptedException {
1043	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1044	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1045	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1046	>	assertTrue(lock.getQueuedThreads().isEmpty());
1047	>	lock.writeLock().lock();
1048	>	assertTrue(lock.getQueuedThreads().isEmpty());
1049	>	t1.start();
1050	>	Thread.sleep(SHORT_DELAY_MS);
1051	>	assertTrue(lock.getQueuedThreads().contains(t1));
1052	>	t2.start();
1053	>	Thread.sleep(SHORT_DELAY_MS);
1054	>	assertTrue(lock.getQueuedThreads().contains(t1));
1055	>	assertTrue(lock.getQueuedThreads().contains(t2));
1056	>	t1.interrupt();
1057	>	Thread.sleep(SHORT_DELAY_MS);
1058	>	assertFalse(lock.getQueuedThreads().contains(t1));
1059	>	assertTrue(lock.getQueuedThreads().contains(t2));
1060	>	lock.writeLock().unlock();
1061	>	Thread.sleep(SHORT_DELAY_MS);
1062	>	assertTrue(lock.getQueuedThreads().isEmpty());
1063	>	t1.join();
1064	>	t2.join();
1065	>	}
1066	>
1067	>	/**
1068	>	* hasWaiters throws NPE if null
1069	>	*/
1070	>	public void testHasWaitersNPE() {
1071	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1072	>	try {
1073	>	lock.hasWaiters(null);
1074	>	shouldThrow();
1075	>	} catch (NullPointerException success) {}
1076	>	}
1077	>
1078	>	/**
1079	>	* getWaitQueueLength throws NPE if null
1080	>	*/
1081	>	public void testGetWaitQueueLengthNPE() {
1082	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1083	>	try {
1084	>	lock.getWaitQueueLength(null);
1085	>	shouldThrow();
1086	>	} catch (NullPointerException success) {}
1087	>	}
1088	>
1089	>
1090	>	/**
1091	>	* getWaitingThreads throws NPE if null
1092	>	*/
1093	>	public void testGetWaitingThreadsNPE() {
1094	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1095	>	try {
1096	>	lock.getWaitingThreads(null);
1097	>	shouldThrow();
1098	>	} catch (NullPointerException success) {}
1099	>	}
1100	>
1101	>	/**
1102	>	* hasWaiters throws IAE if not owned
1103	>	*/
1104	>	public void testHasWaitersIAE() {
1105	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1106	>	final Condition c = lock.writeLock().newCondition();
1107	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1108	>	try {
1109	>	lock2.hasWaiters(c);
1110	>	shouldThrow();
1111	>	} catch (IllegalArgumentException success) {}
1112	>	}
1113	>
1114	>	/**
1115	>	* hasWaiters throws IMSE if not locked
1116	>	*/
1117	>	public void testHasWaitersIMSE() {
1118	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1119	>	final Condition c = lock.writeLock().newCondition();
1120	>	try {
1121	>	lock.hasWaiters(c);
1122	>	shouldThrow();
1123	>	} catch (IllegalMonitorStateException success) {}
1124	>	}
1125	>
1126	>
1127	>	/**
1128	>	* getWaitQueueLength throws IAE if not owned
1129	>	*/
1130	>	public void testGetWaitQueueLengthIAE() {
1131	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1132	>	final Condition c = lock.writeLock().newCondition();
1133	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1134	>	try {
1135	>	lock2.getWaitQueueLength(c);
1136	>	shouldThrow();
1137	>	} catch (IllegalArgumentException success) {}
1138	>	}
1139	>
1140	>	/**
1141	>	* getWaitQueueLength throws IMSE if not locked
1142	>	*/
1143	>	public void testGetWaitQueueLengthIMSE() {
1144	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1145	>	final Condition c = lock.writeLock().newCondition();
1146	>	try {
1147	>	lock.getWaitQueueLength(c);
1148	>	shouldThrow();
1149	>	} catch (IllegalMonitorStateException success) {}
1150	>	}
1151	>
1152	>
1153	>	/**
1154	>	* getWaitingThreads throws IAE if not owned
1155	>	*/
1156	>	public void testGetWaitingThreadsIAE() {
1157	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1158	>	final Condition c = lock.writeLock().newCondition();
1159	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1160	>	try {
1161	>	lock2.getWaitingThreads(c);
1162	>	shouldThrow();
1163	>	} catch (IllegalArgumentException success) {}
1164	>	}
1165	>
1166	>	/**
1167	>	* getWaitingThreads throws IMSE if not locked
1168	>	*/
1169	>	public void testGetWaitingThreadsIMSE() {
1170	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1171	>	final Condition c = lock.writeLock().newCondition();
1172	>	try {
1173	>	lock.getWaitingThreads(c);
1174	>	shouldThrow();
1175	>	} catch (IllegalMonitorStateException success) {}
1176	>	}
1177	>
1178	>
1179	>	/**
1180	>	* hasWaiters returns true when a thread is waiting, else false
1181	>	*/
1182	>	public void testHasWaiters() throws InterruptedException {
1183	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1184	>	final Condition c = lock.writeLock().newCondition();
1185	>	Thread t = newStartedThread(new CheckedRunnable() {
1186	>	public void realRun() throws InterruptedException {
1187	>	lock.writeLock().lock();
1188	>	assertFalse(lock.hasWaiters(c));
1189	>	assertEquals(0, lock.getWaitQueueLength(c));
1190	>	c.await();
1191	>	lock.writeLock().unlock();
1192	>	}});
1193	>
1194	>	Thread.sleep(SHORT_DELAY_MS);
1195	>	lock.writeLock().lock();
1196	>	assertTrue(lock.hasWaiters(c));
1197	>	assertEquals(1, lock.getWaitQueueLength(c));
1198	>	c.signal();
1199	>	lock.writeLock().unlock();
1200	>	Thread.sleep(SHORT_DELAY_MS);
1201	>	lock.writeLock().lock();
1202	>	assertFalse(lock.hasWaiters(c));
1203	>	assertEquals(0, lock.getWaitQueueLength(c));
1204	>	lock.writeLock().unlock();
1205	>	t.join(SHORT_DELAY_MS);
1206	>	assertFalse(t.isAlive());
1207	>	}
1208	>
1209	>	/**
1210	>	* getWaitQueueLength returns number of waiting threads
1211	>	*/
1212	>	public void testGetWaitQueueLength() throws InterruptedException {
1213	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1214	>	final Condition c = lock.writeLock().newCondition();
1215	>	Thread t = newStartedThread(new CheckedRunnable() {
1216	>	public void realRun() throws InterruptedException {
1217	>	lock.writeLock().lock();
1218	>	assertFalse(lock.hasWaiters(c));
1219	>	assertEquals(0, lock.getWaitQueueLength(c));
1220	>	c.await();
1221	>	lock.writeLock().unlock();
1222	>	}});
1223	>
1224	>	Thread.sleep(SHORT_DELAY_MS);
1225	>	lock.writeLock().lock();
1226	>	assertTrue(lock.hasWaiters(c));
1227	>	assertEquals(1, lock.getWaitQueueLength(c));
1228	>	c.signal();
1229	>	lock.writeLock().unlock();
1230	>	Thread.sleep(SHORT_DELAY_MS);
1231	>	lock.writeLock().lock();
1232	>	assertFalse(lock.hasWaiters(c));
1233	>	assertEquals(0, lock.getWaitQueueLength(c));
1234	>	lock.writeLock().unlock();
1235	>	t.join(SHORT_DELAY_MS);
1236	>	assertFalse(t.isAlive());
1237	>	}
1238	>
1239	>
1240	>	/**
1241	>	* getWaitingThreads returns only and all waiting threads
1242	>	*/
1243	>	public void testGetWaitingThreads() throws InterruptedException {
1244	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1245	>	final Condition c = lock.writeLock().newCondition();
1246	>	Thread t1 = new Thread(new CheckedRunnable() {
1247	>	public void realRun() throws InterruptedException {
1248	>	lock.writeLock().lock();
1249	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1250	>	c.await();
1251	>	lock.writeLock().unlock();
1252	>	}});
1253	>
1254	>	Thread t2 = new Thread(new CheckedRunnable() {
1255	>	public void realRun() throws InterruptedException {
1256	>	lock.writeLock().lock();
1257	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1258	>	c.await();
1259	>	lock.writeLock().unlock();
1260	>	}});
1261	>
1262	>	lock.writeLock().lock();
1263	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1264	>	lock.writeLock().unlock();
1265	>	t1.start();
1266	>	Thread.sleep(SHORT_DELAY_MS);
1267	>	t2.start();
1268	>	Thread.sleep(SHORT_DELAY_MS);
1269	>	lock.writeLock().lock();
1270	>	assertTrue(lock.hasWaiters(c));
1271	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1272	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1273	>	c.signalAll();
1274	>	lock.writeLock().unlock();
1275	>	Thread.sleep(SHORT_DELAY_MS);
1276	>	lock.writeLock().lock();
1277	>	assertFalse(lock.hasWaiters(c));
1278	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1279	>	lock.writeLock().unlock();
1280	>	t1.join(SHORT_DELAY_MS);
1281	>	t2.join(SHORT_DELAY_MS);
1282	>	assertFalse(t1.isAlive());
1283	>	assertFalse(t2.isAlive());
1284	>	}
1285	>
1286	>	/**
1287	>	* toString indicates current lock state
1288	>	*/
1289	>	public void testToString() {
1290	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1291	>	String us = lock.toString();
1292	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1293	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1294	>	lock.writeLock().lock();
1295	>	String ws = lock.toString();
1296	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1297	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1298	>	lock.writeLock().unlock();
1299	>	lock.readLock().lock();
1300	>	lock.readLock().lock();
1301	>	String rs = lock.toString();
1302	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1303	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1304	>	}
1305	>
1306	>	/**
1307	>	* readLock.toString indicates current lock state
1308	>	*/
1309	>	public void testReadLockToString() {
1310	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1311	>	String us = lock.readLock().toString();
1312	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1313	>	lock.readLock().lock();
1314	>	lock.readLock().lock();
1315	>	String rs = lock.readLock().toString();
1316	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1317	>	}
1318	>
1319	>	/**
1320	>	* writeLock.toString indicates current lock state
1321	>	*/
1322	>	public void testWriteLockToString() {
1323	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1324	>	String us = lock.writeLock().toString();
1325	>	assertTrue(us.indexOf("Unlocked") >= 0);
1326	>	lock.writeLock().lock();
1327	>	String ls = lock.writeLock().toString();
1328	>	assertTrue(ls.indexOf("Locked") >= 0);
1329		}
112	–
1330
1331		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines