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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.32 by jsr166, Tue Nov 17 14:18:28 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12		import java.io.*;
13	+	import java.util.*;
14
15	<	public class ReentrantReadWriteLockTest extends TestCase {
14	<	static int HOLD_COUNT_TEST_LIMIT = 20;
15	<
15	>	public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19	–
19		public static Test suite() {
20		return new TestSuite(ReentrantReadWriteLockTest.class);
21		}
22
23	+	/**
24	+	* A runnable calling lockInterruptibly
25	+	*/
26	+	class InterruptibleLockRunnable extends CheckedRunnable {
27	+	final ReentrantReadWriteLock lock;
28	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
29	+	public void realRun() throws InterruptedException {
30	+	lock.writeLock().lockInterruptibly();
31	+	}
32	+	}
33	+
34	+
35	+	/**
36	+	* A runnable calling lockInterruptibly that expects to be
37	+	* interrupted
38	+	*/
39	+	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40	+	final ReentrantReadWriteLock lock;
41	+	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
42	+	public void realRun() throws InterruptedException {
43	+	lock.writeLock().lockInterruptibly();
44	+	}
45	+	}
46	+
47	+	/**
48	+	* Subclass to expose protected methods
49	+	*/
50	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
51	+	PublicReentrantReadWriteLock() { super(); }
52	+	public Collection<Thread> getQueuedThreads() {
53	+	return super.getQueuedThreads();
54	+	}
55	+	public Collection<Thread> getWaitingThreads(Condition c) {
56	+	return super.getWaitingThreads(c);
57	+	}
58	+	}
59
60	<	private static long SHORT_DELAY_MS = 100;
61	<	private static long MEDIUM_DELAY_MS = 1000;
27	<	private static long LONG_DELAY_MS = 10000;
28	<
29	<	/*
30	<	* Unlocks an unlocked lock, throws Illegal Monitor State
31	<	*
60	>	/**
61	>	* Constructor sets given fairness, and is in unlocked state
62		*/
63	<
34	<	public void testIllegalMonitorStateException(){
63	>	public void testConstructor() {
64		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
65	<	try{
66	<	rl.writeLock().unlock();
67	<	fail("Should of thown Illegal Monitor State Exception");
65	>	assertFalse(rl.isFair());
66	>	assertFalse(rl.isWriteLocked());
67	>	assertEquals(0, rl.getReadLockCount());
68	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	>	assertTrue(r2.isFair());
70	>	assertFalse(r2.isWriteLocked());
71	>	assertEquals(0, r2.getReadLockCount());
72	>	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
73	>	assertFalse(r3.isFair());
74	>	assertFalse(r3.isWriteLocked());
75	>	assertEquals(0, r3.getReadLockCount());
76	>	}
77	>
78	>	/**
79	>	* write-locking and read-locking an unlocked lock succeed
80	>	*/
81	>	public void testLock() {
82	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
83	>	rl.writeLock().lock();
84	>	assertTrue(rl.isWriteLocked());
85	>	assertTrue(rl.isWriteLockedByCurrentThread());
86	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
87	>	assertEquals(0, rl.getReadLockCount());
88	>	rl.writeLock().unlock();
89	>	assertFalse(rl.isWriteLocked());
90	>	assertFalse(rl.isWriteLockedByCurrentThread());
91	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
92	>	assertEquals(0, rl.getReadLockCount());
93	>	rl.readLock().lock();
94	>	assertFalse(rl.isWriteLocked());
95	>	assertFalse(rl.isWriteLockedByCurrentThread());
96	>	assertEquals(1, rl.getReadLockCount());
97	>	rl.readLock().unlock();
98	>	assertFalse(rl.isWriteLocked());
99	>	assertFalse(rl.isWriteLockedByCurrentThread());
100	>	assertEquals(0, rl.getReadLockCount());
101	>	}
102	>
103	>
104	>	/**
105	>	* locking an unlocked fair lock succeeds
106	>	*/
107	>	public void testFairLock() {
108	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
109	>	rl.writeLock().lock();
110	>	assertTrue(rl.isWriteLocked());
111	>	assertTrue(rl.isWriteLockedByCurrentThread());
112	>	assertTrue(rl.writeLock().isHeldByCurrentThread());
113	>	assertEquals(0, rl.getReadLockCount());
114	>	rl.writeLock().unlock();
115	>	assertFalse(rl.isWriteLocked());
116	>	assertFalse(rl.isWriteLockedByCurrentThread());
117	>	assertFalse(rl.writeLock().isHeldByCurrentThread());
118	>	assertEquals(0, rl.getReadLockCount());
119	>	rl.readLock().lock();
120	>	assertFalse(rl.isWriteLocked());
121	>	assertFalse(rl.isWriteLockedByCurrentThread());
122	>	assertEquals(1, rl.getReadLockCount());
123	>	rl.readLock().unlock();
124	>	assertFalse(rl.isWriteLocked());
125	>	assertFalse(rl.isWriteLockedByCurrentThread());
126	>	assertEquals(0, rl.getReadLockCount());
127	>	}
128	>
129	>	/**
130	>	* getWriteHoldCount returns number of recursive holds
131	>	*/
132	>	public void testGetWriteHoldCount() {
133	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
134	>	for (int i = 1; i <= SIZE; i++) {
135	>	lock.writeLock().lock();
136	>	assertEquals(i,lock.getWriteHoldCount());
137	>	}
138	>	for (int i = SIZE; i > 0; i--) {
139	>	lock.writeLock().unlock();
140	>	assertEquals(i-1,lock.getWriteHoldCount());
141	>	}
142	>	}
143	>
144	>	/**
145	>	* WriteLock.getHoldCount returns number of recursive holds
146	>	*/
147	>	public void testGetHoldCount() {
148	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
149	>	for (int i = 1; i <= SIZE; i++) {
150	>	lock.writeLock().lock();
151	>	assertEquals(i,lock.writeLock().getHoldCount());
152	>	}
153	>	for (int i = SIZE; i > 0; i--) {
154	>	lock.writeLock().unlock();
155	>	assertEquals(i-1,lock.writeLock().getHoldCount());
156	>	}
157	>	}
158
159	<	}catch(IllegalMonitorStateException success){}
159	>	/**
160	>	* getReadHoldCount returns number of recursive holds
161	>	*/
162	>	public void testGetReadHoldCount() {
163	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
164	>	for (int i = 1; i <= SIZE; i++) {
165	>	lock.readLock().lock();
166	>	assertEquals(i,lock.getReadHoldCount());
167	>	}
168	>	for (int i = SIZE; i > 0; i--) {
169	>	lock.readLock().unlock();
170	>	assertEquals(i-1,lock.getReadHoldCount());
171	>	}
172		}
173
174
175	+	/**
176	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
177	+	*/
178	+	public void testUnlock_IllegalMonitorStateException() {
179	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
180	+	try {
181	+	rl.writeLock().unlock();
182	+	shouldThrow();
183	+	} catch (IllegalMonitorStateException success) {}
184	+	}
185	+
186
187	<	public void testInterruptedException(){
187	>	/**
188	>	* write-lockInterruptibly is interruptible
189	>	*/
190	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
191		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
47	–	lock.writeLock().lock();
192		Thread t = new Thread(new Runnable() {
193	<	public void run(){
194	<	try{
193	>	public void run() {
194	>	try {
195	>	lock.writeLock().lockInterruptibly();
196	>	lock.writeLock().unlock();
197		lock.writeLock().lockInterruptibly();
198	<	fail("should throw");
199	<	}catch(InterruptedException success){}
198	>	lock.writeLock().unlock();
199	>	} catch (InterruptedException success) {}
200		}
201		});
56	–	try {
57	–	t.start();
58	–	t.interrupt();
59	–	lock.writeLock().unlock();
60	–	t.join();
61	–	} catch(Exception e){
62	–	fail("unexpected exception");
63	–	}
64	–	}
202
203	<	public void testInterruptedException2(){
203	>	lock.writeLock().lock();
204	>	t.start();
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	t.interrupt();
207	>	Thread.sleep(SHORT_DELAY_MS);
208	>	lock.writeLock().unlock();
209	>	t.join();
210	>	}
211	>
212	>	/**
213	>	* timed write-tryLock is interruptible
214	>	*/
215	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
216		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217		lock.writeLock().lock();
218		Thread t = new Thread(new Runnable() {
219	<	public void run(){
220	<	try{
219	>	public void run() {
220	>	try {
221		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
222	<	fail("should throw");
74	<	}catch(InterruptedException success){}
222	>	} catch (InterruptedException success) {}
223		}
224		});
225	<	try {
226	<	t.start();
227	<	t.interrupt();
228	<	lock.writeLock().unlock();
229	<	t.join();
82	<	} catch(Exception e){
83	<	fail("unexpected exception");
84	<	}
225	>
226	>	t.start();
227	>	t.interrupt();
228	>	lock.writeLock().unlock();
229	>	t.join();
230		}
231
232	<	public void testInterruptedException3(){
232	>	/**
233	>	* read-lockInterruptibly is interruptible
234	>	*/
235	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
236		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
237		lock.writeLock().lock();
238		Thread t = new Thread(new Runnable() {
239	<	public void run(){
240	<	try{
239	>	public void run() {
240	>	try {
241		lock.readLock().lockInterruptibly();
242	<	fail("should throw");
95	<	}catch(InterruptedException success){}
242	>	} catch (InterruptedException success) {}
243		}
244		});
98	–	try {
99	–	t.start();
100	–	t.interrupt();
101	–	lock.writeLock().unlock();
102	–	t.join();
103	–	} catch(Exception e){
104	–	fail("unexpected exception");
105	–	}
106	–	}
245
246	<	public void testInterruptedException4(){
246	>	t.start();
247	>	Thread.sleep(SHORT_DELAY_MS);
248	>	t.interrupt();
249	>	Thread.sleep(SHORT_DELAY_MS);
250	>	lock.writeLock().unlock();
251	>	t.join();
252	>	}
253	>
254	>	/**
255	>	* timed read-tryLock is interruptible
256	>	*/
257	>	public void testReadTryLock_Interrupted() throws InterruptedException {
258		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259		lock.writeLock().lock();
260		Thread t = new Thread(new Runnable() {
261	<	public void run(){
262	<	try{
261	>	public void run() {
262	>	try {
263		lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
264	<	fail("should throw");
265	<	}catch(InterruptedException success){}
264	>	threadShouldThrow();
265	>	} catch (InterruptedException success) {}
266		}
267		});
268	<	try {
269	<	t.start();
270	<	t.interrupt();
271	<	t.join();
123	<	} catch(Exception e){
124	<	fail("unexpected exception");
125	<	}
268	>
269	>	t.start();
270	>	t.interrupt();
271	>	t.join();
272		}
273
274	<
275	<	public void testTryLockWhenLocked() {
274	>
275	>	/**
276	>	* write-tryLock fails if locked
277	>	*/
278	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
279		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
280		lock.writeLock().lock();
281		Thread t = new Thread(new Runnable() {
282	<	public void run(){
283	<	assertFalse(lock.writeLock().tryLock());
282	>	public void run() {
283	>	threadAssertFalse(lock.writeLock().tryLock());
284		}
285		});
137	–	try {
138	–	t.start();
139	–	t.join();
140	–	lock.writeLock().unlock();
141	–	} catch(Exception e){
142	–	fail("unexpected exception");
143	–	}
144	–	}
286
287	<	public void testTryLockWhenLocked2() {
287	>	t.start();
288	>	t.join();
289	>	lock.writeLock().unlock();
290	>	}
291	>
292	>	/**
293	>	* read-tryLock fails if locked
294	>	*/
295	>	public void testReadTryLockWhenLocked() throws InterruptedException {
296		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
297		lock.writeLock().lock();
298		Thread t = new Thread(new Runnable() {
299	<	public void run(){
300	<	assertFalse(lock.readLock().tryLock());
299	>	public void run() {
300	>	threadAssertFalse(lock.readLock().tryLock());
301		}
302		});
154	–	try {
155	–	t.start();
156	–	t.join();
157	–	lock.writeLock().unlock();
158	–	} catch(Exception e){
159	–	fail("unexpected exception");
160	–	}
161	–	}
303
304	<	public void testMultipleReadLocks() {
304	>	t.start();
305	>	t.join();
306	>	lock.writeLock().unlock();
307	>	}
308	>
309	>	/**
310	>	* Multiple threads can hold a read lock when not write-locked
311	>	*/
312	>	public void testMultipleReadLocks() throws InterruptedException {
313		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
314		lock.readLock().lock();
315		Thread t = new Thread(new Runnable() {
316	<	public void run(){
317	<	assertTrue(lock.readLock().tryLock());
316	>	public void run() {
317	>	threadAssertTrue(lock.readLock().tryLock());
318		lock.readLock().unlock();
319		}
320		});
172	–	try {
173	–	t.start();
174	–	t.join();
175	–	lock.readLock().unlock();
176	–	} catch(Exception e){
177	–	fail("unexpected exception");
178	–	}
179	–	}
321
322	<	public void testWriteAfterMultipleReadLocks() {
322	>	t.start();
323	>	t.join();
324	>	lock.readLock().unlock();
325	>	}
326	>
327	>	/**
328	>	* A writelock succeeds after reading threads unlock
329	>	*/
330	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
331		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
332		lock.readLock().lock();
333		Thread t1 = new Thread(new Runnable() {
334	<	public void run(){
334	>	public void run() {
335		lock.readLock().lock();
336		lock.readLock().unlock();
337		}
338		});
339		Thread t2 = new Thread(new Runnable() {
340	<	public void run(){
340	>	public void run() {
341		lock.writeLock().lock();
342		lock.writeLock().unlock();
343		}
344		});
345
346	<	try {
347	<	t1.start();
348	<	t2.start();
349	<	Thread.sleep(SHORT_DELAY_MS);
350	<	lock.readLock().unlock();
351	<	t1.join(MEDIUM_DELAY_MS);
352	<	t2.join(MEDIUM_DELAY_MS);
353	<	assertTrue(!t1.isAlive());
354	<	assertTrue(!t2.isAlive());
206	<
207	<	} catch(Exception e){
208	<	fail("unexpected exception");
209	<	}
210	<	}
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
356	<	public void testReadAfterWriteLock() {
356	>	/**
357	>	* Readlocks succeed after a writing thread unlocks
358	>	*/
359	>	public void testReadAfterWriteLock() throws InterruptedException {
360		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
361		lock.writeLock().lock();
362		Thread t1 = new Thread(new Runnable() {
363	<	public void run(){
363	>	public void run() {
364		lock.readLock().lock();
365		lock.readLock().unlock();
366		}
367		});
368		Thread t2 = new Thread(new Runnable() {
369	<	public void run(){
369	>	public void run() {
370		lock.readLock().lock();
371		lock.readLock().unlock();
372		}
373		});
374
375	<	try {
376	<	t1.start();
377	<	t2.start();
378	<	Thread.sleep(SHORT_DELAY_MS);
379	<	lock.writeLock().unlock();
380	<	t1.join(MEDIUM_DELAY_MS);
381	<	t2.join(MEDIUM_DELAY_MS);
382	<	assertTrue(!t1.isAlive());
383	<	assertTrue(!t2.isAlive());
237	<
238	<	} catch(Exception e){
239	<	fail("unexpected exception");
240	<	}
241	<	}
375	>	t1.start();
376	>	t2.start();
377	>	Thread.sleep(SHORT_DELAY_MS);
378	>	lock.writeLock().unlock();
379	>	t1.join(MEDIUM_DELAY_MS);
380	>	t2.join(MEDIUM_DELAY_MS);
381	>	assertTrue(!t1.isAlive());
382	>	assertTrue(!t2.isAlive());
383	>	}
384
385	+	/**
386	+	* Read trylock succeeds if write locked by current thread
387	+	*/
388	+	public void testReadHoldingWriteLock() {
389	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
390	+	lock.writeLock().lock();
391	+	assertTrue(lock.readLock().tryLock());
392	+	lock.readLock().unlock();
393	+	lock.writeLock().unlock();
394	+	}
395
396	<	public void testTryLockWhenReadLocked() {
396	>	/**
397	>	* Read lock succeeds if write locked by current thread even if
398	>	* other threads are waiting for readlock
399	>	*/
400	>	public void testReadHoldingWriteLock2() throws InterruptedException {
401	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
402	>	lock.writeLock().lock();
403	>	Thread t1 = new Thread(new Runnable() {
404	>	public void run() {
405	>	lock.readLock().lock();
406	>	lock.readLock().unlock();
407	>	}
408	>	});
409	>	Thread t2 = new Thread(new Runnable() {
410	>	public void run() {
411	>	lock.readLock().lock();
412	>	lock.readLock().unlock();
413	>	}
414	>	});
415	>
416	>	t1.start();
417	>	t2.start();
418	>	lock.readLock().lock();
419	>	lock.readLock().unlock();
420	>	Thread.sleep(SHORT_DELAY_MS);
421	>	lock.readLock().lock();
422	>	lock.readLock().unlock();
423	>	lock.writeLock().unlock();
424	>	t1.join(MEDIUM_DELAY_MS);
425	>	t2.join(MEDIUM_DELAY_MS);
426	>	assertTrue(!t1.isAlive());
427	>	assertTrue(!t2.isAlive());
428	>	}
429	>
430	>	/**
431	>	*  Read lock succeeds if write locked by current thread even if
432	>	* other threads are waiting for writelock
433	>	*/
434	>	public void testReadHoldingWriteLock3() throws InterruptedException {
435	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
436	>	lock.writeLock().lock();
437	>	Thread t1 = new Thread(new Runnable() {
438	>	public void run() {
439	>	lock.writeLock().lock();
440	>	lock.writeLock().unlock();
441	>	}
442	>	});
443	>	Thread t2 = new Thread(new Runnable() {
444	>	public void run() {
445	>	lock.writeLock().lock();
446	>	lock.writeLock().unlock();
447	>	}
448	>	});
449	>
450	>	t1.start();
451	>	t2.start();
452	>	lock.readLock().lock();
453	>	lock.readLock().unlock();
454	>	Thread.sleep(SHORT_DELAY_MS);
455	>	lock.readLock().lock();
456	>	lock.readLock().unlock();
457	>	lock.writeLock().unlock();
458	>	t1.join(MEDIUM_DELAY_MS);
459	>	t2.join(MEDIUM_DELAY_MS);
460	>	assertTrue(!t1.isAlive());
461	>	assertTrue(!t2.isAlive());
462	>	}
463	>
464	>
465	>	/**
466	>	*  Write lock succeeds if write locked by current thread even if
467	>	* other threads are waiting for writelock
468	>	*/
469	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
470	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
471	>	lock.writeLock().lock();
472	>	Thread t1 = new Thread(new Runnable() {
473	>	public void run() {
474	>	lock.writeLock().lock();
475	>	lock.writeLock().unlock();
476	>	}
477	>	});
478	>	Thread t2 = new Thread(new Runnable() {
479	>	public void run() {
480	>	lock.writeLock().lock();
481	>	lock.writeLock().unlock();
482	>	}
483	>	});
484	>
485	>	t1.start();
486	>	t2.start();
487	>	lock.writeLock().lock();
488	>	lock.writeLock().unlock();
489	>	Thread.sleep(SHORT_DELAY_MS);
490	>	lock.writeLock().lock();
491	>	lock.writeLock().unlock();
492	>	lock.writeLock().unlock();
493	>	t1.join(MEDIUM_DELAY_MS);
494	>	t2.join(MEDIUM_DELAY_MS);
495	>	assertTrue(!t1.isAlive());
496	>	assertTrue(!t2.isAlive());
497	>	}
498	>
499	>
500	>	/**
501	>	* Fair Read trylock succeeds if write locked by current thread
502	>	*/
503	>	public void testReadHoldingWriteLockFair() {
504	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
505	>	lock.writeLock().lock();
506	>	assertTrue(lock.readLock().tryLock());
507	>	lock.readLock().unlock();
508	>	lock.writeLock().unlock();
509	>	}
510	>
511	>	/**
512	>	* Fair Read lock succeeds if write locked by current thread even if
513	>	* other threads are waiting for readlock
514	>	*/
515	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
516	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
517	>	lock.writeLock().lock();
518	>	Thread t1 = new Thread(new Runnable() {
519	>	public void run() {
520	>	lock.readLock().lock();
521	>	lock.readLock().unlock();
522	>	}
523	>	});
524	>	Thread t2 = new Thread(new Runnable() {
525	>	public void run() {
526	>	lock.readLock().lock();
527	>	lock.readLock().unlock();
528	>	}
529	>	});
530	>
531	>	t1.start();
532	>	t2.start();
533	>	lock.readLock().lock();
534	>	lock.readLock().unlock();
535	>	Thread.sleep(SHORT_DELAY_MS);
536	>	lock.readLock().lock();
537	>	lock.readLock().unlock();
538	>	lock.writeLock().unlock();
539	>	t1.join(MEDIUM_DELAY_MS);
540	>	t2.join(MEDIUM_DELAY_MS);
541	>	assertTrue(!t1.isAlive());
542	>	assertTrue(!t2.isAlive());
543	>	}
544	>
545	>
546	>	/**
547	>	* Fair Read lock succeeds if write locked by current thread even if
548	>	* other threads are waiting for writelock
549	>	*/
550	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
551	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
552	>	lock.writeLock().lock();
553	>	Thread t1 = new Thread(new Runnable() {
554	>	public void run() {
555	>	lock.writeLock().lock();
556	>	lock.writeLock().unlock();
557	>	}
558	>	});
559	>	Thread t2 = new Thread(new Runnable() {
560	>	public void run() {
561	>	lock.writeLock().lock();
562	>	lock.writeLock().unlock();
563	>	}
564	>	});
565	>
566	>	t1.start();
567	>	t2.start();
568	>	lock.readLock().lock();
569	>	lock.readLock().unlock();
570	>	Thread.sleep(SHORT_DELAY_MS);
571	>	lock.readLock().lock();
572	>	lock.readLock().unlock();
573	>	lock.writeLock().unlock();
574	>	t1.join(MEDIUM_DELAY_MS);
575	>	t2.join(MEDIUM_DELAY_MS);
576	>	assertTrue(!t1.isAlive());
577	>	assertTrue(!t2.isAlive());
578	>	}
579	>
580	>
581	>	/**
582	>	* Fair Write lock succeeds if write locked by current thread even if
583	>	* other threads are waiting for writelock
584	>	*/
585	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
586	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
587	>	lock.writeLock().lock();
588	>	Thread t1 = new Thread(new Runnable() {
589	>	public void run() {
590	>	lock.writeLock().lock();
591	>	lock.writeLock().unlock();
592	>	}
593	>	});
594	>	Thread t2 = new Thread(new Runnable() {
595	>	public void run() {
596	>	lock.writeLock().lock();
597	>	lock.writeLock().unlock();
598	>	}
599	>	});
600	>
601	>	t1.start();
602	>	t2.start();
603	>	Thread.sleep(SHORT_DELAY_MS);
604	>	assertTrue(lock.isWriteLockedByCurrentThread());
605	>	assertTrue(lock.getWriteHoldCount() == 1);
606	>	lock.writeLock().lock();
607	>	assertTrue(lock.getWriteHoldCount() == 2);
608	>	lock.writeLock().unlock();
609	>	lock.writeLock().lock();
610	>	lock.writeLock().unlock();
611	>	lock.writeLock().unlock();
612	>	t1.join(MEDIUM_DELAY_MS);
613	>	t2.join(MEDIUM_DELAY_MS);
614	>	assertTrue(!t1.isAlive());
615	>	assertTrue(!t2.isAlive());
616	>	}
617	>
618	>
619	>	/**
620	>	* Read tryLock succeeds if readlocked but not writelocked
621	>	*/
622	>	public void testTryLockWhenReadLocked() throws InterruptedException {
623		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
624		lock.readLock().lock();
625		Thread t = new Thread(new Runnable() {
626	<	public void run(){
627	<	assertTrue(lock.readLock().tryLock());
626	>	public void run() {
627	>	threadAssertTrue(lock.readLock().tryLock());
628		lock.readLock().unlock();
629		}
630		});
253	–	try {
254	–	t.start();
255	–	t.join();
256	–	lock.readLock().unlock();
257	–	} catch(Exception e){
258	–	fail("unexpected exception");
259	–	}
260	–	}
631
632	<
632	>	t.start();
633	>	t.join();
634	>	lock.readLock().unlock();
635	>	}
636	>
637
638	<	public void testWriteTryLockWhenReadLocked() {
638	>
639	>	/**
640	>	* write tryLock fails when readlocked
641	>	*/
642	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
643		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644		lock.readLock().lock();
645		Thread t = new Thread(new Runnable() {
646	<	public void run(){
647	<	assertFalse(lock.writeLock().tryLock());
646	>	public void run() {
647	>	threadAssertFalse(lock.writeLock().tryLock());
648		}
649		});
272	–	try {
273	–	t.start();
274	–	t.join();
275	–	lock.readLock().unlock();
276	–	} catch(Exception e){
277	–	fail("unexpected exception");
278	–	}
279	–	}
650
651	<
651	>	t.start();
652	>	t.join();
653	>	lock.readLock().unlock();
654	>	}
655	>
656
657	<	public void testTryLock_Timeout(){
657	>	/**
658	>	* Fair Read tryLock succeeds if readlocked but not writelocked
659	>	*/
660	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
661	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
662	>	lock.readLock().lock();
663	>	Thread t = new Thread(new Runnable() {
664	>	public void run() {
665	>	threadAssertTrue(lock.readLock().tryLock());
666	>	lock.readLock().unlock();
667	>	}
668	>	});
669	>
670	>	t.start();
671	>	t.join();
672	>	lock.readLock().unlock();
673	>	}
674	>
675	>
676	>
677	>	/**
678	>	* Fair write tryLock fails when readlocked
679	>	*/
680	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
681	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
682	>	lock.readLock().lock();
683	>	Thread t = new Thread(new Runnable() {
684	>	public void run() {
685	>	threadAssertFalse(lock.writeLock().tryLock());
686	>	}
687	>	});
688	>
689	>	t.start();
690	>	t.join();
691	>	lock.readLock().unlock();
692	>	}
693	>
694	>
695	>
696	>	/**
697	>	* write timed tryLock times out if locked
698	>	*/
699	>	public void testWriteTryLock_Timeout() throws InterruptedException {
700		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
701		lock.writeLock().lock();
702		Thread t = new Thread(new Runnable() {
703	<	public void run(){
703	>	public void run() {
704		try {
705	<	assertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
705	>	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
706		} catch (Exception ex) {
707	<	fail("unexpected exception");
707	>	threadUnexpectedException();
708		}
709		}
710		});
295	–	try {
296	–	t.start();
297	–	t.join();
298	–	lock.writeLock().unlock();
299	–	} catch(Exception e){
300	–	fail("unexpected exception");
301	–	}
302	–	}
711
712	<	public void testTryLock_Timeout2(){
712	>	t.start();
713	>	t.join();
714	>	lock.writeLock().unlock();
715	>	}
716	>
717	>	/**
718	>	* read timed tryLock times out if write-locked
719	>	*/
720	>	public void testReadTryLock_Timeout() throws InterruptedException {
721		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722		lock.writeLock().lock();
723		Thread t = new Thread(new Runnable() {
724	<	public void run(){
724	>	public void run() {
725		try {
726	<	assertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
726	>	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
727		} catch (Exception ex) {
728	<	fail("unexpected exception");
728	>	threadUnexpectedException();
729		}
730		}
731		});
732	<	try {
733	<	t.start();
734	<	t.join();
735	<	lock.writeLock().unlock();
736	<	} catch(Exception e){
321	<	fail("unexpected exception");
322	<	}
323	<	}
732	>
733	>	t.start();
734	>	t.join();
735	>	lock.writeLock().unlock();
736	>	}
737
738
739	<	public void testLockInterruptibly() {
739	>	/**
740	>	* write lockInterruptibly succeeds if lock free else is interruptible
741	>	*/
742	>	public void testWriteLockInterruptibly() throws InterruptedException {
743		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
744	<	try {
745	<	lock.writeLock().lockInterruptibly();
330	<	} catch(Exception e) {
331	<	fail("unexpected exception");
332	<	}
333	<	Thread t = new Thread(new Runnable() {
744	>	lock.writeLock().lockInterruptibly();
745	>	Thread t = new Thread(new Runnable() {
746		public void run() {
747		try {
748		lock.writeLock().lockInterruptibly();
749	<	fail("should throw");
749	>	threadShouldThrow();
750		}
751	<	catch(InterruptedException success) {
751	>	catch (InterruptedException success) {
752		}
753		}
754		});
755	<	try {
756	<	t.start();
757	<	t.interrupt();
758	<	t.join();
759	<	lock.writeLock().unlock();
760	<	} catch(Exception e){
761	<	fail("unexpected exception");
350	<	}
755	>
756	>	t.start();
757	>	Thread.sleep(SHORT_DELAY_MS);
758	>	t.interrupt();
759	>	Thread.sleep(SHORT_DELAY_MS);
760	>	t.join();
761	>	lock.writeLock().unlock();
762		}
763
764	<	public void testLockInterruptibly2() {
764	>	/**
765	>	*  read lockInterruptibly succeeds if lock free else is interruptible
766	>	*/
767	>	public void testReadLockInterruptibly() throws InterruptedException {
768		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
769	<	try {
770	<	lock.writeLock().lockInterruptibly();
357	<	} catch(Exception e) {
358	<	fail("unexpected exception");
359	<	}
360	<	Thread t = new Thread(new Runnable() {
769	>	lock.writeLock().lockInterruptibly();
770	>	Thread t = new Thread(new Runnable() {
771		public void run() {
772		try {
773		lock.readLock().lockInterruptibly();
774	<	fail("should throw");
774	>	threadShouldThrow();
775		}
776	<	catch(InterruptedException success) {
776	>	catch (InterruptedException success) {
777		}
778		}
779		});
780	<	try {
781	<	t.start();
782	<	t.interrupt();
783	<	t.join();
784	<	lock.writeLock().unlock();
785	<	} catch(Exception e){
376	<	fail("unexpected exception");
377	<	}
780	>
781	>	t.start();
782	>	Thread.sleep(SHORT_DELAY_MS);
783	>	t.interrupt();
784	>	t.join();
785	>	lock.writeLock().unlock();
786		}
787
788	<	public void testAwait_IllegalMonitor() {
789	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
788	>	/**
789	>	* Calling await without holding lock throws IllegalMonitorStateException
790	>	*/
791	>	public void testAwait_IllegalMonitor() throws InterruptedException {
792	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
793		final Condition c = lock.writeLock().newCondition();
794		try {
795		c.await();
796	<	fail("should throw");
797	<	}
387	<	catch (IllegalMonitorStateException success) {
388	<	}
389	<	catch (Exception ex) {
390	<	fail("should throw IMSE");
391	<	}
796	>	shouldThrow();
797	>	} catch (IllegalMonitorStateException success) {}
798		}
799
800	+	/**
801	+	* Calling signal without holding lock throws IllegalMonitorStateException
802	+	*/
803		public void testSignal_IllegalMonitor() {
804	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
804	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
805		final Condition c = lock.writeLock().newCondition();
806		try {
807		c.signal();
808	<	fail("should throw");
809	<	}
401	<	catch (IllegalMonitorStateException success) {
402	<	}
403	<	catch (Exception ex) {
404	<	fail("should throw IMSE");
405	<	}
808	>	shouldThrow();
809	>	} catch (IllegalMonitorStateException success) {}
810		}
811
812	<	public void testAwaitNanos_Timeout() {
813	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
812	>	/**
813	>	* awaitNanos without a signal times out
814	>	*/
815	>	public void testAwaitNanos_Timeout() throws InterruptedException {
816	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817		final Condition c = lock.writeLock().newCondition();
818	<	try {
819	<	lock.writeLock().lock();
820	<	long t = c.awaitNanos(100);
821	<	assertTrue(t <= 0);
822	<	lock.writeLock().unlock();
416	<	}
417	<	catch (Exception ex) {
418	<	fail("unexpected exception");
419	<	}
818	>
819	>	lock.writeLock().lock();
820	>	long t = c.awaitNanos(100);
821	>	assertTrue(t <= 0);
822	>	lock.writeLock().unlock();
823		}
824
825	+
826	+	/**
827	+	*  timed await without a signal times out
828	+	*/
829		public void testAwait_Timeout() {
830	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
830	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831		final Condition c = lock.writeLock().newCondition();
832	<	try {
833	<	lock.writeLock().lock();
427	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
428	<	lock.writeLock().unlock();
429	<	}
430	<	catch (Exception ex) {
431	<	fail("unexpected exception");
432	<	}
832	>	lock.writeLock().lock();
833	>	lock.writeLock().unlock();
834		}
835
836	+	/**
837	+	* awaitUntil without a signal times out
838	+	*/
839		public void testAwaitUntil_Timeout() {
840	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
841		final Condition c = lock.writeLock().newCondition();
842	<	try {
843	<	lock.writeLock().lock();
844	<	java.util.Date d = new java.util.Date();
441	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
442	<	lock.writeLock().unlock();
443	<	}
444	<	catch (Exception ex) {
445	<	fail("unexpected exception");
446	<	}
842	>	lock.writeLock().lock();
843	>	java.util.Date d = new java.util.Date();
844	>	lock.writeLock().unlock();
845		}
846
847	<	public void testAwait() {
848	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
847	>	/**
848	>	* await returns when signalled
849	>	*/
850	>	public void testAwait() throws InterruptedException {
851	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
852		final Condition c = lock.writeLock().newCondition();
853	<	Thread t = new Thread(new Runnable() {
853	>	Thread t = new Thread(new Runnable() {
854		public void run() {
855		try {
856		lock.writeLock().lock();
857		c.await();
858		lock.writeLock().unlock();
859		}
860	<	catch(InterruptedException e) {
861	<	fail("unexpected exception");
860	>	catch (InterruptedException e) {
861	>	threadUnexpectedException();
862		}
863		}
864		});
865
866	<	try {
867	<	t.start();
868	<	Thread.sleep(SHORT_DELAY_MS);
869	<	lock.writeLock().lock();
870	<	c.signal();
871	<	lock.writeLock().unlock();
872	<	t.join(SHORT_DELAY_MS);
873	<	assertFalse(t.isAlive());
874	<	}
875	<	catch (Exception ex) {
876	<	fail("unexpected exception");
866	>	t.start();
867	>	Thread.sleep(SHORT_DELAY_MS);
868	>	lock.writeLock().lock();
869	>	c.signal();
870	>	lock.writeLock().unlock();
871	>	t.join(SHORT_DELAY_MS);
872	>	assertFalse(t.isAlive());
873	>	}
874	>
875	>	/** A helper class for uninterruptible wait tests */
876	>	class UninterruptableThread extends Thread {
877	>	private Lock lock;
878	>	private Condition c;
879	>
880	>	public volatile boolean canAwake = false;
881	>	public volatile boolean interrupted = false;
882	>	public volatile boolean lockStarted = false;
883	>
884	>	public UninterruptableThread(Lock lock, Condition c) {
885	>	this.lock = lock;
886	>	this.c = c;
887	>	}
888	>
889	>	public synchronized void run() {
890	>	lock.lock();
891	>	lockStarted = true;
892	>
893	>	while (!canAwake) {
894	>	c.awaitUninterruptibly();
895	>	}
896	>
897	>	interrupted = isInterrupted();
898	>	lock.unlock();
899		}
900		}
901
902	<	public void testAwaitUninterruptibly() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	/**
903	>	* awaitUninterruptibly doesn't abort on interrupt
904	>	*/
905	>	public void testAwaitUninterruptibly() throws InterruptedException {
906	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
907		final Condition c = lock.writeLock().newCondition();
908	<	Thread t = new Thread(new Runnable() {
483	<	public void run() {
484	<	lock.writeLock().lock();
485	<	c.awaitUninterruptibly();
486	<	lock.writeLock().unlock();
487	<	}
488	<	});
908	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
909
910	+	thread.start();
911	+
912	+	while (!thread.lockStarted) {
913	+	Thread.sleep(100);
914	+	}
915	+
916	+	lock.writeLock().lock();
917		try {
918	<	t.start();
919	<	Thread.sleep(SHORT_DELAY_MS);
493	<	t.interrupt();
494	<	lock.writeLock().lock();
918	>	thread.interrupt();
919	>	thread.canAwake = true;
920		c.signal();
921	+	} finally {
922		lock.writeLock().unlock();
497	–	t.join(SHORT_DELAY_MS);
498	–	assertFalse(t.isAlive());
499	–	}
500	–	catch (Exception ex) {
501	–	fail("unexpected exception");
923		}
924	+
925	+	thread.join();
926	+	assertTrue(thread.interrupted);
927	+	assertFalse(thread.isAlive());
928		}
929
930	<	public void testAwait_Interrupt() {
931	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
930	>	/**
931	>	* await is interruptible
932	>	*/
933	>	public void testAwait_Interrupt() throws InterruptedException {
934	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
935		final Condition c = lock.writeLock().newCondition();
936	<	Thread t = new Thread(new Runnable() {
936	>	Thread t = new Thread(new Runnable() {
937		public void run() {
938		try {
939		lock.writeLock().lock();
940		c.await();
941		lock.writeLock().unlock();
942	<	fail("should throw");
942	>	threadShouldThrow();
943		}
944	<	catch(InterruptedException success) {
944	>	catch (InterruptedException success) {
945		}
946		}
947		});
948
949	<	try {
950	<	t.start();
951	<	Thread.sleep(SHORT_DELAY_MS);
952	<	t.interrupt();
953	<	t.join(SHORT_DELAY_MS);
526	<	assertFalse(t.isAlive());
527	<	}
528	<	catch (Exception ex) {
529	<	fail("unexpected exception");
530	<	}
949	>	t.start();
950	>	Thread.sleep(SHORT_DELAY_MS);
951	>	t.interrupt();
952	>	t.join(SHORT_DELAY_MS);
953	>	assertFalse(t.isAlive());
954		}
955
956	<	public void testAwaitNanos_Interrupt() {
957	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
956	>	/**
957	>	* awaitNanos is interruptible
958	>	*/
959	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
960	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
961		final Condition c = lock.writeLock().newCondition();
962	<	Thread t = new Thread(new Runnable() {
962	>	Thread t = new Thread(new Runnable() {
963		public void run() {
964		try {
965		lock.writeLock().lock();
966		c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
967		lock.writeLock().unlock();
968	<	fail("should throw");
968	>	threadShouldThrow();
969		}
970	<	catch(InterruptedException success) {
970	>	catch (InterruptedException success) {
971		}
972		}
973		});
974
975	<	try {
976	<	t.start();
977	<	Thread.sleep(SHORT_DELAY_MS);
978	<	t.interrupt();
979	<	t.join(SHORT_DELAY_MS);
554	<	assertFalse(t.isAlive());
555	<	}
556	<	catch (Exception ex) {
557	<	fail("unexpected exception");
558	<	}
975	>	t.start();
976	>	Thread.sleep(SHORT_DELAY_MS);
977	>	t.interrupt();
978	>	t.join(SHORT_DELAY_MS);
979	>	assertFalse(t.isAlive());
980		}
981
982	<	public void testAwaitUntil_Interrupt() {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
982	>	/**
983	>	* awaitUntil is interruptible
984	>	*/
985	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
986	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
987		final Condition c = lock.writeLock().newCondition();
988	<	Thread t = new Thread(new Runnable() {
988	>	Thread t = new Thread(new Runnable() {
989		public void run() {
990		try {
991		lock.writeLock().lock();
992		java.util.Date d = new java.util.Date();
993		c.awaitUntil(new java.util.Date(d.getTime() + 10000));
994		lock.writeLock().unlock();
995	<	fail("should throw");
995	>	threadShouldThrow();
996		}
997	<	catch(InterruptedException success) {
997	>	catch (InterruptedException success) {
998		}
999		}
1000		});
1001
1002	<	try {
1003	<	t.start();
1004	<	Thread.sleep(SHORT_DELAY_MS);
1005	<	t.interrupt();
1006	<	t.join(SHORT_DELAY_MS);
583	<	assertFalse(t.isAlive());
584	<	}
585	<	catch (Exception ex) {
586	<	fail("unexpected exception");
587	<	}
1002	>	t.start();
1003	>	Thread.sleep(SHORT_DELAY_MS);
1004	>	t.interrupt();
1005	>	t.join(SHORT_DELAY_MS);
1006	>	assertFalse(t.isAlive());
1007		}
1008
1009	<	public void testSignalAll() {
1010	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1009	>	/**
1010	>	* signalAll wakes up all threads
1011	>	*/
1012	>	public void testSignalAll() throws InterruptedException {
1013	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1014		final Condition c = lock.writeLock().newCondition();
1015	<	Thread t1 = new Thread(new Runnable() {
1015	>	Thread t1 = new Thread(new Runnable() {
1016		public void run() {
1017		try {
1018		lock.writeLock().lock();
1019		c.await();
1020		lock.writeLock().unlock();
1021		}
1022	<	catch(InterruptedException e) {
1023	<	fail("unexpected exception");
1022	>	catch (InterruptedException e) {
1023	>	threadUnexpectedException();
1024		}
1025		}
1026		});
1027
1028	<	Thread t2 = new Thread(new Runnable() {
1028	>	Thread t2 = new Thread(new Runnable() {
1029		public void run() {
1030		try {
1031		lock.writeLock().lock();
1032		c.await();
1033		lock.writeLock().unlock();
1034		}
1035	<	catch(InterruptedException e) {
1036	<	fail("unexpected exception");
1035	>	catch (InterruptedException e) {
1036	>	threadUnexpectedException();
1037		}
1038		}
1039		});
1040
1041	<	try {
1042	<	t1.start();
1043	<	t2.start();
1044	<	Thread.sleep(SHORT_DELAY_MS);
1045	<	lock.writeLock().lock();
1046	<	c.signalAll();
1047	<	lock.writeLock().unlock();
1048	<	t1.join(SHORT_DELAY_MS);
1049	<	t2.join(SHORT_DELAY_MS);
1050	<	assertFalse(t1.isAlive());
629	<	assertFalse(t2.isAlive());
630	<	}
631	<	catch (Exception ex) {
632	<	fail("unexpected exception");
633	<	}
1041	>	t1.start();
1042	>	t2.start();
1043	>	Thread.sleep(SHORT_DELAY_MS);
1044	>	lock.writeLock().lock();
1045	>	c.signalAll();
1046	>	lock.writeLock().unlock();
1047	>	t1.join(SHORT_DELAY_MS);
1048	>	t2.join(SHORT_DELAY_MS);
1049	>	assertFalse(t1.isAlive());
1050	>	assertFalse(t2.isAlive());
1051		}
1052
1053	<	public void testSerialization() {
1053	>	/**
1054	>	* A serialized lock deserializes as unlocked
1055	>	*/
1056	>	public void testSerialization() throws Exception {
1057		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1058		l.readLock().lock();
1059		l.readLock().unlock();
1060
1061	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1062	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1063	+	out.writeObject(l);
1064	+	out.close();
1065	+
1066	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1067	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1068	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1069	+	r.readLock().lock();
1070	+	r.readLock().unlock();
1071	+	}
1072	+
1073	+	/**
1074	+	* hasQueuedThreads reports whether there are waiting threads
1075	+	*/
1076	+	public void testhasQueuedThreads() throws InterruptedException {
1077	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1078	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1079	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1080	+	assertFalse(lock.hasQueuedThreads());
1081	+	lock.writeLock().lock();
1082	+	t1.start();
1083	+	Thread.sleep(SHORT_DELAY_MS);
1084	+	assertTrue(lock.hasQueuedThreads());
1085	+	t2.start();
1086	+	Thread.sleep(SHORT_DELAY_MS);
1087	+	assertTrue(lock.hasQueuedThreads());
1088	+	t1.interrupt();
1089	+	Thread.sleep(SHORT_DELAY_MS);
1090	+	assertTrue(lock.hasQueuedThreads());
1091	+	lock.writeLock().unlock();
1092	+	Thread.sleep(SHORT_DELAY_MS);
1093	+	assertFalse(lock.hasQueuedThreads());
1094	+	t1.join();
1095	+	t2.join();
1096	+	}
1097	+
1098	+	/**
1099	+	* hasQueuedThread(null) throws NPE
1100	+	*/
1101	+	public void testHasQueuedThreadNPE() {
1102	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1103		try {
1104	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1105	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1106	<	out.writeObject(l);
645	<	out.close();
646	<
647	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
648	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
649	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
650	<	r.readLock().lock();
651	<	r.readLock().unlock();
652	<	} catch(Exception e){
653	<	e.printStackTrace();
654	<	fail("unexpected exception");
1104	>	sync.hasQueuedThread(null);
1105	>	shouldThrow();
1106	>	} catch (NullPointerException success) {
1107		}
1108		}
1109
1110	+	/**
1111	+	* hasQueuedThread reports whether a thread is queued.
1112	+	*/
1113	+	public void testHasQueuedThread() throws InterruptedException {
1114	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1115	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1116	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1117	+	assertFalse(sync.hasQueuedThread(t1));
1118	+	assertFalse(sync.hasQueuedThread(t2));
1119	+	sync.writeLock().lock();
1120	+	t1.start();
1121	+	Thread.sleep(SHORT_DELAY_MS);
1122	+	assertTrue(sync.hasQueuedThread(t1));
1123	+	t2.start();
1124	+	Thread.sleep(SHORT_DELAY_MS);
1125	+	assertTrue(sync.hasQueuedThread(t1));
1126	+	assertTrue(sync.hasQueuedThread(t2));
1127	+	t1.interrupt();
1128	+	Thread.sleep(SHORT_DELAY_MS);
1129	+	assertFalse(sync.hasQueuedThread(t1));
1130	+	assertTrue(sync.hasQueuedThread(t2));
1131	+	sync.writeLock().unlock();
1132	+	Thread.sleep(SHORT_DELAY_MS);
1133	+	assertFalse(sync.hasQueuedThread(t1));
1134	+	Thread.sleep(SHORT_DELAY_MS);
1135	+	assertFalse(sync.hasQueuedThread(t2));
1136	+	t1.join();
1137	+	t2.join();
1138	+	}
1139	+
1140	+
1141	+	/**
1142	+	* getQueueLength reports number of waiting threads
1143	+	*/
1144	+	public void testGetQueueLength() throws InterruptedException {
1145	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1146	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1147	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1148	+	assertEquals(0, lock.getQueueLength());
1149	+	lock.writeLock().lock();
1150	+	t1.start();
1151	+	Thread.sleep(SHORT_DELAY_MS);
1152	+	assertEquals(1, lock.getQueueLength());
1153	+	t2.start();
1154	+	Thread.sleep(SHORT_DELAY_MS);
1155	+	assertEquals(2, lock.getQueueLength());
1156	+	t1.interrupt();
1157	+	Thread.sleep(SHORT_DELAY_MS);
1158	+	assertEquals(1, lock.getQueueLength());
1159	+	lock.writeLock().unlock();
1160	+	Thread.sleep(SHORT_DELAY_MS);
1161	+	assertEquals(0, lock.getQueueLength());
1162	+	t1.join();
1163	+	t2.join();
1164	+	}
1165	+
1166	+	/**
1167	+	* getQueuedThreads includes waiting threads
1168	+	*/
1169	+	public void testGetQueuedThreads() throws InterruptedException {
1170	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1171	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1172	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1173	+	assertTrue(lock.getQueuedThreads().isEmpty());
1174	+	lock.writeLock().lock();
1175	+	assertTrue(lock.getQueuedThreads().isEmpty());
1176	+	t1.start();
1177	+	Thread.sleep(SHORT_DELAY_MS);
1178	+	assertTrue(lock.getQueuedThreads().contains(t1));
1179	+	t2.start();
1180	+	Thread.sleep(SHORT_DELAY_MS);
1181	+	assertTrue(lock.getQueuedThreads().contains(t1));
1182	+	assertTrue(lock.getQueuedThreads().contains(t2));
1183	+	t1.interrupt();
1184	+	Thread.sleep(SHORT_DELAY_MS);
1185	+	assertFalse(lock.getQueuedThreads().contains(t1));
1186	+	assertTrue(lock.getQueuedThreads().contains(t2));
1187	+	lock.writeLock().unlock();
1188	+	Thread.sleep(SHORT_DELAY_MS);
1189	+	assertTrue(lock.getQueuedThreads().isEmpty());
1190	+	t1.join();
1191	+	t2.join();
1192	+	}
1193	+
1194	+	/**
1195	+	* hasWaiters throws NPE if null
1196	+	*/
1197	+	public void testHasWaitersNPE() {
1198	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1199	+	try {
1200	+	lock.hasWaiters(null);
1201	+	shouldThrow();
1202	+	} catch (NullPointerException success) {}
1203	+	}
1204	+
1205	+	/**
1206	+	* getWaitQueueLength throws NPE if null
1207	+	*/
1208	+	public void testGetWaitQueueLengthNPE() {
1209	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1210	+	try {
1211	+	lock.getWaitQueueLength(null);
1212	+	shouldThrow();
1213	+	} catch (NullPointerException success) {}
1214	+	}
1215	+
1216	+
1217	+	/**
1218	+	* getWaitingThreads throws NPE if null
1219	+	*/
1220	+	public void testGetWaitingThreadsNPE() {
1221	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1222	+	try {
1223	+	lock.getWaitingThreads(null);
1224	+	shouldThrow();
1225	+	} catch (NullPointerException success) {}
1226	+	}
1227	+
1228	+	/**
1229	+	* hasWaiters throws IAE if not owned
1230	+	*/
1231	+	public void testHasWaitersIAE() {
1232	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1233	+	final Condition c = lock.writeLock().newCondition();
1234	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1235	+	try {
1236	+	lock2.hasWaiters(c);
1237	+	shouldThrow();
1238	+	} catch (IllegalArgumentException success) {}
1239	+	}
1240	+
1241	+	/**
1242	+	* hasWaiters throws IMSE if not locked
1243	+	*/
1244	+	public void testHasWaitersIMSE() {
1245	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1246	+	final Condition c = lock.writeLock().newCondition();
1247	+	try {
1248	+	lock.hasWaiters(c);
1249	+	shouldThrow();
1250	+	} catch (IllegalMonitorStateException success) {}
1251	+	}
1252	+
1253	+
1254	+	/**
1255	+	* getWaitQueueLength throws IAE if not owned
1256	+	*/
1257	+	public void testGetWaitQueueLengthIAE() {
1258	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1259	+	final Condition c = lock.writeLock().newCondition();
1260	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1261	+	try {
1262	+	lock2.getWaitQueueLength(c);
1263	+	shouldThrow();
1264	+	} catch (IllegalArgumentException success) {}
1265	+	}
1266	+
1267	+	/**
1268	+	* getWaitQueueLength throws IMSE if not locked
1269	+	*/
1270	+	public void testGetWaitQueueLengthIMSE() {
1271	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1272	+	final Condition c = lock.writeLock().newCondition();
1273	+	try {
1274	+	lock.getWaitQueueLength(c);
1275	+	shouldThrow();
1276	+	} catch (IllegalMonitorStateException success) {}
1277	+	}
1278	+
1279	+
1280	+	/**
1281	+	* getWaitingThreads throws IAE if not owned
1282	+	*/
1283	+	public void testGetWaitingThreadsIAE() {
1284	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1285	+	final Condition c = lock.writeLock().newCondition();
1286	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1287	+	try {
1288	+	lock2.getWaitingThreads(c);
1289	+	shouldThrow();
1290	+	} catch (IllegalArgumentException success) {}
1291	+	}
1292	+
1293	+	/**
1294	+	* getWaitingThreads throws IMSE if not locked
1295	+	*/
1296	+	public void testGetWaitingThreadsIMSE() {
1297	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1298	+	final Condition c = lock.writeLock().newCondition();
1299	+	try {
1300	+	lock.getWaitingThreads(c);
1301	+	shouldThrow();
1302	+	} catch (IllegalMonitorStateException success) {}
1303	+	}
1304	+
1305	+
1306	+	/**
1307	+	* hasWaiters returns true when a thread is waiting, else false
1308	+	*/
1309	+	public void testHasWaiters() throws InterruptedException {
1310	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1311	+	final Condition c = lock.writeLock().newCondition();
1312	+	Thread t = new Thread(new Runnable() {
1313	+	public void run() {
1314	+	try {
1315	+	lock.writeLock().lock();
1316	+	threadAssertFalse(lock.hasWaiters(c));
1317	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1318	+	c.await();
1319	+	lock.writeLock().unlock();
1320	+	}
1321	+	catch (InterruptedException e) {
1322	+	threadUnexpectedException();
1323	+	}
1324	+	}
1325	+	});
1326	+
1327	+	t.start();
1328	+	Thread.sleep(SHORT_DELAY_MS);
1329	+	lock.writeLock().lock();
1330	+	assertTrue(lock.hasWaiters(c));
1331	+	assertEquals(1, lock.getWaitQueueLength(c));
1332	+	c.signal();
1333	+	lock.writeLock().unlock();
1334	+	Thread.sleep(SHORT_DELAY_MS);
1335	+	lock.writeLock().lock();
1336	+	assertFalse(lock.hasWaiters(c));
1337	+	assertEquals(0, lock.getWaitQueueLength(c));
1338	+	lock.writeLock().unlock();
1339	+	t.join(SHORT_DELAY_MS);
1340	+	assertFalse(t.isAlive());
1341	+	}
1342	+
1343	+	/**
1344	+	* getWaitQueueLength returns number of waiting threads
1345	+	*/
1346	+	public void testGetWaitQueueLength() throws InterruptedException {
1347	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	+	final Condition c = lock.writeLock().newCondition();
1349	+	Thread t = new Thread(new Runnable() {
1350	+	public void run() {
1351	+	try {
1352	+	lock.writeLock().lock();
1353	+	threadAssertFalse(lock.hasWaiters(c));
1354	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1355	+	c.await();
1356	+	lock.writeLock().unlock();
1357	+	}
1358	+	catch (InterruptedException e) {
1359	+	threadUnexpectedException();
1360	+	}
1361	+	}
1362	+	});
1363	+
1364	+	t.start();
1365	+	Thread.sleep(SHORT_DELAY_MS);
1366	+	lock.writeLock().lock();
1367	+	assertTrue(lock.hasWaiters(c));
1368	+	assertEquals(1, lock.getWaitQueueLength(c));
1369	+	c.signal();
1370	+	lock.writeLock().unlock();
1371	+	Thread.sleep(SHORT_DELAY_MS);
1372	+	lock.writeLock().lock();
1373	+	assertFalse(lock.hasWaiters(c));
1374	+	assertEquals(0, lock.getWaitQueueLength(c));
1375	+	lock.writeLock().unlock();
1376	+	t.join(SHORT_DELAY_MS);
1377	+	assertFalse(t.isAlive());
1378	+	}
1379	+
1380	+
1381	+	/**
1382	+	* getWaitingThreads returns only and all waiting threads
1383	+	*/
1384	+	public void testGetWaitingThreads() throws InterruptedException {
1385	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1386	+	final Condition c = lock.writeLock().newCondition();
1387	+	Thread t1 = new Thread(new Runnable() {
1388	+	public void run() {
1389	+	try {
1390	+	lock.writeLock().lock();
1391	+	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1392	+	c.await();
1393	+	lock.writeLock().unlock();
1394	+	}
1395	+	catch (InterruptedException e) {
1396	+	threadUnexpectedException();
1397	+	}
1398	+	}
1399	+	});
1400	+
1401	+	Thread t2 = new Thread(new Runnable() {
1402	+	public void run() {
1403	+	try {
1404	+	lock.writeLock().lock();
1405	+	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	+	c.await();
1407	+	lock.writeLock().unlock();
1408	+	}
1409	+	catch (InterruptedException e) {
1410	+	threadUnexpectedException();
1411	+	}
1412	+	}
1413	+	});
1414	+
1415	+	lock.writeLock().lock();
1416	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1417	+	lock.writeLock().unlock();
1418	+	t1.start();
1419	+	Thread.sleep(SHORT_DELAY_MS);
1420	+	t2.start();
1421	+	Thread.sleep(SHORT_DELAY_MS);
1422	+	lock.writeLock().lock();
1423	+	assertTrue(lock.hasWaiters(c));
1424	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1425	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1426	+	c.signalAll();
1427	+	lock.writeLock().unlock();
1428	+	Thread.sleep(SHORT_DELAY_MS);
1429	+	lock.writeLock().lock();
1430	+	assertFalse(lock.hasWaiters(c));
1431	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1432	+	lock.writeLock().unlock();
1433	+	t1.join(SHORT_DELAY_MS);
1434	+	t2.join(SHORT_DELAY_MS);
1435	+	assertFalse(t1.isAlive());
1436	+	assertFalse(t2.isAlive());
1437	+	}
1438	+
1439	+	/**
1440	+	* toString indicates current lock state
1441	+	*/
1442	+	public void testToString() {
1443	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1444	+	String us = lock.toString();
1445	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1446	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1447	+	lock.writeLock().lock();
1448	+	String ws = lock.toString();
1449	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1450	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1451	+	lock.writeLock().unlock();
1452	+	lock.readLock().lock();
1453	+	lock.readLock().lock();
1454	+	String rs = lock.toString();
1455	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1456	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1457	+	}
1458	+
1459	+	/**
1460	+	* readLock.toString indicates current lock state
1461	+	*/
1462	+	public void testReadLockToString() {
1463	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1464	+	String us = lock.readLock().toString();
1465	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1466	+	lock.readLock().lock();
1467	+	lock.readLock().lock();
1468	+	String rs = lock.readLock().toString();
1469	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1470	+	}
1471	+
1472	+	/**
1473	+	* writeLock.toString indicates current lock state
1474	+	*/
1475	+	public void testWriteLockToString() {
1476	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1477	+	String us = lock.writeLock().toString();
1478	+	assertTrue(us.indexOf("Unlocked") >= 0);
1479	+	lock.writeLock().lock();
1480	+	String ls = lock.writeLock().toString();
1481	+	assertTrue(ls.indexOf("Locked") >= 0);
1482	+	}
1483
1484		}

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