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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.32 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 JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
20		return new TestSuite(ReentrantReadWriteLockTest.class);
21		}
22
23	+	/**
24	+	* A runnable calling lockInterruptibly
25	+	*/
26	+	class InterruptibleLockRunnable 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	<	/*
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	>	/**
61	>	* Constructor sets given fairness, and is in unlocked state
62	>	*/
63	>	public void testConstructor() {
64	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
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() {
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	<	/*
104	>	/**
105		* locking an unlocked fair lock succeeds
106		*/
107	<	public void testFairLock() {
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		/**
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() {
178	>	public void testUnlock_IllegalMonitorStateException() {
179		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
180		try {
181		rl.writeLock().unlock();
182		shouldThrow();
183	<	} catch(IllegalMonitorStateException success){}
183	>	} catch (IllegalMonitorStateException success) {}
184		}
185
186
187		/**
188		* write-lockInterruptibly is interruptible
189		*/
190	<	public void testWriteLockInterruptibly_Interrupted() {
190	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
191		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
62	–	lock.writeLock().lock();
192		Thread t = new Thread(new Runnable() {
193		public void run() {
194		try {
195		lock.writeLock().lockInterruptibly();
196	<	threadShouldThrow();
197	<	} catch(InterruptedException success){}
196	>	lock.writeLock().unlock();
197	>	lock.writeLock().lockInterruptibly();
198	>	lock.writeLock().unlock();
199	>	} catch (InterruptedException success) {}
200		}
201		});
202	<	try {
203	<	t.start();
204	<	t.interrupt();
205	<	lock.writeLock().unlock();
206	<	t.join();
207	<	} catch(Exception e){
208	<	unexpectedException();
209	<	}
210	<	}
202	>
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
213	>	* timed write-tryLock is interruptible
214		*/
215	<	public void testWriteTryLock_Interrupted() {
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 {
221		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
222	<	threadShouldThrow();
92	<	} catch(InterruptedException success){}
222	>	} catch (InterruptedException success) {}
223		}
224		});
225	<	try {
226	<	t.start();
227	<	t.interrupt();
228	<	lock.writeLock().unlock();
229	<	t.join();
100	<	} catch(Exception e){
101	<	unexpectedException();
102	<	}
225	>
226	>	t.start();
227	>	t.interrupt();
228	>	lock.writeLock().unlock();
229	>	t.join();
230		}
231
232		/**
233		* read-lockInterruptibly is interruptible
234		*/
235	<	public void testReadLockInterruptibly_Interrupted() {
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 {
241		lock.readLock().lockInterruptibly();
242	<	threadShouldThrow();
116	<	} catch(InterruptedException success){}
242	>	} catch (InterruptedException success) {}
243		}
244		});
245	<	try {
246	<	t.start();
247	<	t.interrupt();
248	<	lock.writeLock().unlock();
249	<	t.join();
250	<	} catch(Exception e){
251	<	unexpectedException();
252	<	}
127	<	}
245	>
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
255	>	* timed read-tryLock is interruptible
256		*/
257	<	public void testReadTryLock_Interrupted() {
257	>	public void testReadTryLock_Interrupted() throws InterruptedException {
258		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259		lock.writeLock().lock();
260		Thread t = new Thread(new Runnable() {
#	Line 137 | Line 262 | public class ReentrantReadWriteLockTest
262		try {
263		lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
264		threadShouldThrow();
265	<	} catch(InterruptedException success){}
265	>	} catch (InterruptedException success) {}
266		}
267		});
268	<	try {
269	<	t.start();
270	<	t.interrupt();
271	<	t.join();
147	<	} catch(Exception e){
148	<	unexpectedException();
149	<	}
268	>
269	>	t.start();
270	>	t.interrupt();
271	>	t.join();
272		}
273
274	<
274	>
275		/**
276	<	* write-trylock fails if locked
276	>	* write-tryLock fails if locked
277		*/
278	<	public void testWriteTryLockWhenLocked() {
278	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
279		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
280		lock.writeLock().lock();
281		Thread t = new Thread(new Runnable() {
#	Line 161 | Line 283 | public class ReentrantReadWriteLockTest
283		threadAssertFalse(lock.writeLock().tryLock());
284		}
285		});
286	<	try {
287	<	t.start();
288	<	t.join();
289	<	lock.writeLock().unlock();
290	<	} catch(Exception e){
169	<	unexpectedException();
170	<	}
171	<	}
286	>
287	>	t.start();
288	>	t.join();
289	>	lock.writeLock().unlock();
290	>	}
291
292		/**
293	<	* read-trylock fails if locked
293	>	* read-tryLock fails if locked
294		*/
295	<	public void testReadTryLockWhenLocked() {
295	>	public void testReadTryLockWhenLocked() throws InterruptedException {
296		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
297		lock.writeLock().lock();
298		Thread t = new Thread(new Runnable() {
#	Line 181 | Line 300 | public class ReentrantReadWriteLockTest
300		threadAssertFalse(lock.readLock().tryLock());
301		}
302		});
303	<	try {
304	<	t.start();
305	<	t.join();
306	<	lock.writeLock().unlock();
307	<	} catch(Exception e){
189	<	unexpectedException();
190	<	}
191	<	}
303	>
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() {
312	>	public void testMultipleReadLocks() throws InterruptedException {
313		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
314		lock.readLock().lock();
315		Thread t = new Thread(new Runnable() {
#	Line 202 | Line 318 | public class ReentrantReadWriteLockTest
318		lock.readLock().unlock();
319		}
320		});
321	<	try {
322	<	t.start();
323	<	t.join();
324	<	lock.readLock().unlock();
325	<	} catch(Exception e){
210	<	unexpectedException();
211	<	}
212	<	}
321	>
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() {
330	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
331		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
332		lock.readLock().lock();
333		Thread t1 = new Thread(new Runnable() {
#	Line 230 | Line 343 | public class ReentrantReadWriteLockTest
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());
242	<
243	<	} catch(Exception e){
244	<	unexpectedException();
245	<	}
246	<	}
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		/**
357		* Readlocks succeed after a writing thread unlocks
358		*/
359	<	public void testReadAfterWriteLock() {
359	>	public void testReadAfterWriteLock() throws InterruptedException {
360		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
361		lock.writeLock().lock();
362		Thread t1 = new Thread(new Runnable() {
#	Line 264 | Line 372 | public class ReentrantReadWriteLockTest
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());
384	<
385	<	} catch(Exception e){
386	<	unexpectedException();
387	<	}
388	<	}
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	>	/**
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	<	* Read trylock succeeds if readlocked but not writelocked
466	>	*  Write lock succeeds if write locked by current thread even if
467	>	* other threads are waiting for writelock
468		*/
469	<	public void testTryLockWhenReadLocked() {
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() {
#	Line 292 | Line 628 | public class ReentrantReadWriteLockTest
628		lock.readLock().unlock();
629		}
630		});
295	–	try {
296	–	t.start();
297	–	t.join();
298	–	lock.readLock().unlock();
299	–	} catch(Exception e){
300	–	unexpectedException();
301	–	}
302	–	}
631
632	<
632	>	t.start();
633	>	t.join();
634	>	lock.readLock().unlock();
635	>	}
636	>
637	>
638
639		/**
640	<	* write trylock fails when readlocked
640	>	* write tryLock fails when readlocked
641		*/
642	<	public void testWriteTryLockWhenReadLocked() {
642	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
643		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644		lock.readLock().lock();
645		Thread t = new Thread(new Runnable() {
#	Line 314 | Line 647 | public class ReentrantReadWriteLockTest
647		threadAssertFalse(lock.writeLock().tryLock());
648		}
649		});
317	–	try {
318	–	t.start();
319	–	t.join();
320	–	lock.readLock().unlock();
321	–	} catch(Exception e){
322	–	unexpectedException();
323	–	}
324	–	}
650
651	<
651	>	t.start();
652	>	t.join();
653	>	lock.readLock().unlock();
654	>	}
655	>
656
657		/**
658	<	* write timed trylock times out if locked
658	>	* Fair Read tryLock succeeds if readlocked but not writelocked
659		*/
660	<	public void testWriteTryLock_Timeout() {
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() {
#	Line 340 | Line 708 | public class ReentrantReadWriteLockTest
708		}
709		}
710		});
711	<	try {
712	<	t.start();
713	<	t.join();
714	<	lock.writeLock().unlock();
715	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
711	>
712	>	t.start();
713	>	t.join();
714	>	lock.writeLock().unlock();
715	>	}
716
717		/**
718	<	* read timed trylock times out if write-locked
718	>	* read timed tryLock times out if write-locked
719		*/
720	<	public void testReadTryLock_Timeout() {
720	>	public void testReadTryLock_Timeout() throws InterruptedException {
721		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722		lock.writeLock().lock();
723		Thread t = new Thread(new Runnable() {
#	Line 364 | Line 729 | public class ReentrantReadWriteLockTest
729		}
730		}
731		});
732	<	try {
733	<	t.start();
734	<	t.join();
735	<	lock.writeLock().unlock();
736	<	} catch(Exception e){
372	<	unexpectedException();
373	<	}
374	<	}
732	>
733	>	t.start();
734	>	t.join();
735	>	lock.writeLock().unlock();
736	>	}
737
738
739		/**
740		* write lockInterruptibly succeeds if lock free else is interruptible
741		*/
742	<	public void testWriteLockInterruptibly() {
742	>	public void testWriteLockInterruptibly() throws InterruptedException {
743		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
744	<	try {
745	<	lock.writeLock().lockInterruptibly();
384	<	} catch(Exception e) {
385	<	unexpectedException();
386	<	}
387	<	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		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	<	unexpectedException();
404	<	}
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		/**
765		*  read lockInterruptibly succeeds if lock free else is interruptible
766		*/
767	<	public void testReadLockInterruptibly() {
767	>	public void testReadLockInterruptibly() throws InterruptedException {
768		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
769	<	try {
770	<	lock.writeLock().lockInterruptibly();
414	<	} catch(Exception e) {
415	<	unexpectedException();
416	<	}
417	<	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		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){
433	<	unexpectedException();
434	<	}
780	>
781	>	t.start();
782	>	Thread.sleep(SHORT_DELAY_MS);
783	>	t.interrupt();
784	>	t.join();
785	>	lock.writeLock().unlock();
786		}
787
788		/**
789		* Calling await without holding lock throws IllegalMonitorStateException
790		*/
791	<	public void testAwait_IllegalMonitor() {
792	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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		shouldThrow();
797	<	}
447	<	catch (IllegalMonitorStateException success) {
448	<	}
449	<	catch (Exception ex) {
450	<	shouldThrow();
451	<	}
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		shouldThrow();
809	<	}
464	<	catch (IllegalMonitorStateException success) {
465	<	}
466	<	catch (Exception ex) {
467	<	unexpectedException();
468	<	}
809	>	} catch (IllegalMonitorStateException success) {}
810		}
811
812		/**
813		* awaitNanos without a signal times out
814		*/
815	<	public void testAwaitNanos_Timeout() {
816	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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();
482	<	}
483	<	catch (Exception ex) {
484	<	unexpectedException();
485	<	}
818	>
819	>	lock.writeLock().lock();
820	>	long t = c.awaitNanos(100);
821	>	assertTrue(t <= 0);
822	>	lock.writeLock().unlock();
823		}
824
825
#	Line 490 | Line 827 | public class ReentrantReadWriteLockTest
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();
497	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
498	<	lock.writeLock().unlock();
499	<	}
500	<	catch (Exception ex) {
501	<	unexpectedException();
502	<	}
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();
514	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
515	<	lock.writeLock().unlock();
516	<	}
517	<	catch (Exception ex) {
518	<	unexpectedException();
519	<	}
842	>	lock.writeLock().lock();
843	>	java.util.Date d = new java.util.Date();
844	>	lock.writeLock().unlock();
845		}
846
847		/**
848		* await returns when signalled
849		*/
850	<	public void testAwait() {
851	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
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	<	unexpectedException();
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		/**
903		* awaitUninterruptibly doesn't abort on interrupt
904		*/
905	<	public void testAwaitUninterruptibly() {
906	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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() {
909	<	public void run() {
910	<	lock.writeLock().lock();
564	<	c.awaitUninterruptibly();
565	<	lock.writeLock().unlock();
566	<	}
567	<	});
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);
572	<	t.interrupt();
573	<	lock.writeLock().lock();
918	>	thread.interrupt();
919	>	thread.canAwake = true;
920		c.signal();
921	+	} finally {
922		lock.writeLock().unlock();
576	–	assert(t.isInterrupted());
577	–	t.join(SHORT_DELAY_MS);
578	–	assertFalse(t.isAlive());
579	–	}
580	–	catch (Exception ex) {
581	–	unexpectedException();
923		}
924	+
925	+	thread.join();
926	+	assertTrue(thread.interrupted);
927	+	assertFalse(thread.isAlive());
928		}
929
930		/**
931		* await is interruptible
932		*/
933	<	public void testAwait_Interrupt() {
934	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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();
#	Line 596 | Line 941 | public class ReentrantReadWriteLockTest
941		lock.writeLock().unlock();
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);
609	<	assertFalse(t.isAlive());
610	<	}
611	<	catch (Exception ex) {
612	<	unexpectedException();
613	<	}
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		/**
957		* awaitNanos is interruptible
958		*/
959	<	public void testAwaitNanos_Interrupt() {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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();
#	Line 627 | Line 967 | public class ReentrantReadWriteLockTest
967		lock.writeLock().unlock();
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);
640	<	assertFalse(t.isAlive());
641	<	}
642	<	catch (Exception ex) {
643	<	unexpectedException();
644	<	}
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		/**
983		* awaitUntil is interruptible
984		*/
985	<	public void testAwaitUntil_Interrupt() {
986	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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();
#	Line 659 | Line 994 | public class ReentrantReadWriteLockTest
994		lock.writeLock().unlock();
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);
672	<	assertFalse(t.isAlive());
673	<	}
674	<	catch (Exception ex) {
675	<	unexpectedException();
676	<	}
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		/**
1010		* signalAll wakes up all threads
1011		*/
1012	<	public void testSignalAll() {
1013	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
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) {
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());
721	<	assertFalse(t2.isAlive());
722	<	}
723	<	catch (Exception ex) {
724	<	unexpectedException();
725	<	}
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		/**
1054		* A serialized lock deserializes as unlocked
1055		*/
1056	<	public void testSerialization() {
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);
740	<	out.close();
741	<
742	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
743	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
744	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
745	<	r.readLock().lock();
746	<	r.readLock().unlock();
747	<	} catch(Exception e){
748	<	e.printStackTrace();
749	<	unexpectedException();
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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