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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.35 by jsr166, Sat Nov 21 02:07:27 2009 UTC vs.
Revision 1.55 by jsr166, Mon May 2 01:15:26 2011 UTC

#	Line 1 | Line 1
1		/*
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
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
#	Line 9 | Line 9
9		import junit.framework.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.util.*;
15
16		public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 58 | Line 59 | public class ReentrantReadWriteLockTest
59		}
60
61		/**
62	+	* Releases write lock, checking that it had a hold count of 1.
63	+	*/
64	+	void releaseWriteLock(ReentrantReadWriteLock lock) {
65	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
66	+	assertTrue(writeLock.isHeldByCurrentThread());
67	+	writeLock.unlock();
68	+	assertFalse(writeLock.isHeldByCurrentThread());
69	+	}
70	+
71	+	/**
72		* Constructor sets given fairness, and is in unlocked state
73		*/
74		public void testConstructor() {
#	Line 189 | Line 200 | public class ReentrantReadWriteLockTest
200		*/
201		public void testWriteLockInterruptibly_Interrupted() throws Exception {
202		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
203	>	lock.writeLock().lock();
204	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
205		public void realRun() throws InterruptedException {
206		lock.writeLock().lockInterruptibly();
195	–	lock.writeLock().unlock();
196	–	lock.writeLock().lockInterruptibly();
197	–	lock.writeLock().unlock();
207		}});
208
200	–	lock.writeLock().lock();
201	–	t.start();
209		Thread.sleep(SHORT_DELAY_MS);
210		t.interrupt();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	lock.writeLock().unlock();
206	<	t.join();
211	>	awaitTermination(t, LONG_DELAY_MS);
212	>	releaseWriteLock(lock);
213		}
214
215		/**
#	Line 212 | Line 218 | public class ReentrantReadWriteLockTest
218		public void testWriteTryLock_Interrupted() throws InterruptedException {
219		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
220		lock.writeLock().lock();
221	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
221	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
222		public void realRun() throws InterruptedException {
223	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
223	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
224		}});
225
226	<	t.start();
226	>	Thread.sleep(SHORT_DELAY_MS);
227		t.interrupt();
228	<	lock.writeLock().unlock();
229	<	t.join();
228	>	awaitTermination(t, LONG_DELAY_MS);
229	>	releaseWriteLock(lock);
230		}
231
232		/**
#	Line 229 | Line 235 | public class ReentrantReadWriteLockTest
235		public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
236		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
237		lock.writeLock().lock();
238	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
238	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
239		public void realRun() throws InterruptedException {
240		lock.readLock().lockInterruptibly();
241		}});
242
237	–	t.start();
243		Thread.sleep(SHORT_DELAY_MS);
244		t.interrupt();
245	<	Thread.sleep(SHORT_DELAY_MS);
246	<	lock.writeLock().unlock();
242	<	t.join();
245	>	awaitTermination(t, LONG_DELAY_MS);
246	>	releaseWriteLock(lock);
247		}
248
249		/**
#	Line 248 | Line 252 | public class ReentrantReadWriteLockTest
252		public void testReadTryLock_Interrupted() throws InterruptedException {
253		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254		lock.writeLock().lock();
255	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256		public void realRun() throws InterruptedException {
257	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
257	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
258		}});
259
260	<	t.start();
260	>	Thread.sleep(SHORT_DELAY_MS);
261		t.interrupt();
262	<	t.join();
262	>	awaitTermination(t, LONG_DELAY_MS);
263	>	releaseWriteLock(lock);
264		}
265
266
#	Line 265 | Line 270 | public class ReentrantReadWriteLockTest
270		public void testWriteTryLockWhenLocked() throws InterruptedException {
271		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
272		lock.writeLock().lock();
273	<	Thread t = new Thread(new Runnable() {
274	<	public void run() {
275	<	threadAssertFalse(lock.writeLock().tryLock());
276	<	}
272	<	});
273	>	Thread t = newStartedThread(new CheckedRunnable() {
274	>	public void realRun() {
275	>	assertFalse(lock.writeLock().tryLock());
276	>	}});
277
278	<	t.start();
279	<	t.join();
276	<	lock.writeLock().unlock();
278	>	awaitTermination(t, LONG_DELAY_MS);
279	>	releaseWriteLock(lock);
280		}
281
282		/**
#	Line 282 | Line 285 | public class ReentrantReadWriteLockTest
285		public void testReadTryLockWhenLocked() throws InterruptedException {
286		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287		lock.writeLock().lock();
288	<	Thread t = new Thread(new Runnable() {
289	<	public void run() {
290	<	threadAssertFalse(lock.readLock().tryLock());
291	<	}
289	<	});
288	>	Thread t = newStartedThread(new CheckedRunnable() {
289	>	public void realRun() {
290	>	assertFalse(lock.readLock().tryLock());
291	>	}});
292
293	<	t.start();
294	<	t.join();
293	<	lock.writeLock().unlock();
293	>	awaitTermination(t, LONG_DELAY_MS);
294	>	releaseWriteLock(lock);
295		}
296
297		/**
#	Line 299 | Line 300 | public class ReentrantReadWriteLockTest
300		public void testMultipleReadLocks() throws InterruptedException {
301		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302		lock.readLock().lock();
303	<	Thread t = new Thread(new Runnable() {
304	<	public void run() {
305	<	threadAssertTrue(lock.readLock().tryLock());
306	<	lock.readLock().unlock();
307	<	}
307	<	});
303	>	Thread t = newStartedThread(new CheckedRunnable() {
304	>	public void realRun() {
305	>	assertTrue(lock.readLock().tryLock());
306	>	lock.readLock().unlock();
307	>	}});
308
309	<	t.start();
310	<	t.join();
309	>	awaitTermination(t, LONG_DELAY_MS);
310		lock.readLock().unlock();
311		}
312
#	Line 317 | Line 316 | public class ReentrantReadWriteLockTest
316		public void testWriteAfterMultipleReadLocks() throws InterruptedException {
317		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
318		lock.readLock().lock();
319	<	Thread t1 = new Thread(new Runnable() {
320	<	public void run() {
321	<	lock.readLock().lock();
322	<	lock.readLock().unlock();
323	<	}
324	<	});
325	<	Thread t2 = new Thread(new Runnable() {
326	<	public void run() {
327	<	lock.writeLock().lock();
328	<	lock.writeLock().unlock();
330	<	}
331	<	});
319	>	Thread t1 = newStartedThread(new CheckedRunnable() {
320	>	public void realRun() {
321	>	lock.readLock().lock();
322	>	lock.readLock().unlock();
323	>	}});
324	>	Thread t2 = newStartedThread(new CheckedRunnable() {
325	>	public void realRun() {
326	>	lock.writeLock().lock();
327	>	lock.writeLock().unlock();
328	>	}});
329
333	–	t1.start();
334	–	t2.start();
330		Thread.sleep(SHORT_DELAY_MS);
331		lock.readLock().unlock();
332	<	t1.join(MEDIUM_DELAY_MS);
333	<	t2.join(MEDIUM_DELAY_MS);
339	<	assertTrue(!t1.isAlive());
340	<	assertTrue(!t2.isAlive());
332	>	awaitTermination(t1, LONG_DELAY_MS);
333	>	awaitTermination(t2, LONG_DELAY_MS);
334		}
335
336		/**
#	Line 346 | Line 339 | public class ReentrantReadWriteLockTest
339		public void testReadAfterWriteLock() throws InterruptedException {
340		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
341		lock.writeLock().lock();
342	<	Thread t1 = new Thread(new Runnable() {
343	<	public void run() {
344	<	lock.readLock().lock();
345	<	lock.readLock().unlock();
346	<	}
347	<	});
348	<	Thread t2 = new Thread(new Runnable() {
349	<	public void run() {
350	<	lock.readLock().lock();
351	<	lock.readLock().unlock();
359	<	}
360	<	});
342	>	Thread t1 = newStartedThread(new CheckedRunnable() {
343	>	public void realRun() {
344	>	lock.readLock().lock();
345	>	lock.readLock().unlock();
346	>	}});
347	>	Thread t2 = newStartedThread(new CheckedRunnable() {
348	>	public void realRun() {
349	>	lock.readLock().lock();
350	>	lock.readLock().unlock();
351	>	}});
352
362	–	t1.start();
363	–	t2.start();
353		Thread.sleep(SHORT_DELAY_MS);
354	<	lock.writeLock().unlock();
355	<	t1.join(MEDIUM_DELAY_MS);
356	<	t2.join(MEDIUM_DELAY_MS);
357	<	assertTrue(!t1.isAlive());
358	<	assertTrue(!t2.isAlive());
354	>	assertTrue(t1.isAlive());
355	>	assertTrue(t2.isAlive());
356	>	releaseWriteLock(lock);
357	>	awaitTermination(t1, LONG_DELAY_MS);
358	>	awaitTermination(t2, LONG_DELAY_MS);
359		}
360
361		/**
#	Line 387 | Line 376 | public class ReentrantReadWriteLockTest
376		public void testReadHoldingWriteLock2() throws InterruptedException {
377		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
378		lock.writeLock().lock();
379	<	Thread t1 = new Thread(new Runnable() {
380	<	public void run() {
381	<	lock.readLock().lock();
382	<	lock.readLock().unlock();
383	<	}
384	<	});
385	<	Thread t2 = new Thread(new Runnable() {
386	<	public void run() {
387	<	lock.readLock().lock();
388	<	lock.readLock().unlock();
400	<	}
401	<	});
379	>	Thread t1 = newStartedThread(new CheckedRunnable() {
380	>	public void realRun() {
381	>	lock.readLock().lock();
382	>	lock.readLock().unlock();
383	>	}});
384	>	Thread t2 = newStartedThread(new CheckedRunnable() {
385	>	public void realRun() {
386	>	lock.readLock().lock();
387	>	lock.readLock().unlock();
388	>	}});
389
403	–	t1.start();
404	–	t2.start();
390		lock.readLock().lock();
391		lock.readLock().unlock();
392		Thread.sleep(SHORT_DELAY_MS);
393		lock.readLock().lock();
394		lock.readLock().unlock();
395		lock.writeLock().unlock();
396	<	t1.join(MEDIUM_DELAY_MS);
397	<	t2.join(MEDIUM_DELAY_MS);
413	<	assertTrue(!t1.isAlive());
414	<	assertTrue(!t2.isAlive());
396	>	awaitTermination(t1, LONG_DELAY_MS);
397	>	awaitTermination(t2, LONG_DELAY_MS);
398		}
399
400		/**
401	<	*  Read lock succeeds if write locked by current thread even if
401	>	* Read lock succeeds if write locked by current thread even if
402		* other threads are waiting for writelock
403		*/
404		public void testReadHoldingWriteLock3() throws InterruptedException {
405		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
406		lock.writeLock().lock();
407	<	Thread t1 = new Thread(new Runnable() {
408	<	public void run() {
409	<	lock.writeLock().lock();
410	<	lock.writeLock().unlock();
411	<	}
412	<	});
413	<	Thread t2 = new Thread(new Runnable() {
414	<	public void run() {
415	<	lock.writeLock().lock();
416	<	lock.writeLock().unlock();
434	<	}
435	<	});
407	>	Thread t1 = newStartedThread(new CheckedRunnable() {
408	>	public void realRun() {
409	>	lock.writeLock().lock();
410	>	lock.writeLock().unlock();
411	>	}});
412	>	Thread t2 = newStartedThread(new CheckedRunnable() {
413	>	public void realRun() {
414	>	lock.writeLock().lock();
415	>	lock.writeLock().unlock();
416	>	}});
417
437	–	t1.start();
438	–	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);
447	<	assertTrue(!t1.isAlive());
448	<	assertTrue(!t2.isAlive());
424	>	awaitTermination(t1, LONG_DELAY_MS);
425	>	awaitTermination(t2, LONG_DELAY_MS);
426		}
427
428
429		/**
430	<	*  Write lock succeeds if write locked by current thread even if
430	>	* Write lock succeeds if write locked by current thread even if
431		* other threads are waiting for writelock
432		*/
433		public void testWriteHoldingWriteLock4() throws InterruptedException {
434		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
435		lock.writeLock().lock();
436	<	Thread t1 = new Thread(new Runnable() {
437	<	public void run() {
438	<	lock.writeLock().lock();
439	<	lock.writeLock().unlock();
440	<	}
441	<	});
442	<	Thread t2 = new Thread(new Runnable() {
443	<	public void run() {
444	<	lock.writeLock().lock();
445	<	lock.writeLock().unlock();
469	<	}
470	<	});
436	>	Thread t1 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.writeLock().lock();
439	>	lock.writeLock().unlock();
440	>	}});
441	>	Thread t2 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446
472	–	t1.start();
473	–	t2.start();
447		lock.writeLock().lock();
448		lock.writeLock().unlock();
449		Thread.sleep(SHORT_DELAY_MS);
450		lock.writeLock().lock();
451		lock.writeLock().unlock();
452		lock.writeLock().unlock();
453	<	t1.join(MEDIUM_DELAY_MS);
454	<	t2.join(MEDIUM_DELAY_MS);
482	<	assertTrue(!t1.isAlive());
483	<	assertTrue(!t2.isAlive());
453	>	awaitTermination(t1, LONG_DELAY_MS);
454	>	awaitTermination(t2, LONG_DELAY_MS);
455		}
456
457
#	Line 502 | Line 473 | public class ReentrantReadWriteLockTest
473		public void testReadHoldingWriteLockFair2() throws InterruptedException {
474		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
475		lock.writeLock().lock();
476	<	Thread t1 = new Thread(new Runnable() {
477	<	public void run() {
478	<	lock.readLock().lock();
479	<	lock.readLock().unlock();
480	<	}
481	<	});
482	<	Thread t2 = new Thread(new Runnable() {
483	<	public void run() {
484	<	lock.readLock().lock();
485	<	lock.readLock().unlock();
515	<	}
516	<	});
476	>	Thread t1 = newStartedThread(new CheckedRunnable() {
477	>	public void realRun() {
478	>	lock.readLock().lock();
479	>	lock.readLock().unlock();
480	>	}});
481	>	Thread t2 = newStartedThread(new CheckedRunnable() {
482	>	public void realRun() {
483	>	lock.readLock().lock();
484	>	lock.readLock().unlock();
485	>	}});
486
518	–	t1.start();
519	–	t2.start();
487		lock.readLock().lock();
488		lock.readLock().unlock();
489		Thread.sleep(SHORT_DELAY_MS);
490		lock.readLock().lock();
491		lock.readLock().unlock();
492		lock.writeLock().unlock();
493	<	t1.join(MEDIUM_DELAY_MS);
494	<	t2.join(MEDIUM_DELAY_MS);
528	<	assertTrue(!t1.isAlive());
529	<	assertTrue(!t2.isAlive());
493	>	awaitTermination(t1, LONG_DELAY_MS);
494	>	awaitTermination(t2, LONG_DELAY_MS);
495		}
496
497
#	Line 537 | Line 502 | public class ReentrantReadWriteLockTest
502		public void testReadHoldingWriteLockFair3() throws InterruptedException {
503		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
504		lock.writeLock().lock();
505	<	Thread t1 = new Thread(new Runnable() {
506	<	public void run() {
507	<	lock.writeLock().lock();
508	<	lock.writeLock().unlock();
509	<	}
510	<	});
511	<	Thread t2 = new Thread(new Runnable() {
512	<	public void run() {
513	<	lock.writeLock().lock();
514	<	lock.writeLock().unlock();
550	<	}
551	<	});
505	>	Thread t1 = newStartedThread(new CheckedRunnable() {
506	>	public void realRun() {
507	>	lock.writeLock().lock();
508	>	lock.writeLock().unlock();
509	>	}});
510	>	Thread t2 = newStartedThread(new CheckedRunnable() {
511	>	public void realRun() {
512	>	lock.writeLock().lock();
513	>	lock.writeLock().unlock();
514	>	}});
515
553	–	t1.start();
554	–	t2.start();
516		lock.readLock().lock();
517		lock.readLock().unlock();
518		Thread.sleep(SHORT_DELAY_MS);
519		lock.readLock().lock();
520		lock.readLock().unlock();
521		lock.writeLock().unlock();
522	<	t1.join(MEDIUM_DELAY_MS);
523	<	t2.join(MEDIUM_DELAY_MS);
563	<	assertTrue(!t1.isAlive());
564	<	assertTrue(!t2.isAlive());
522	>	awaitTermination(t1, LONG_DELAY_MS);
523	>	awaitTermination(t2, LONG_DELAY_MS);
524		}
525
526
#	Line 572 | Line 531 | public class ReentrantReadWriteLockTest
531		public void testWriteHoldingWriteLockFair4() throws InterruptedException {
532		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
533		lock.writeLock().lock();
534	<	Thread t1 = new Thread(new Runnable() {
535	<	public void run() {
536	<	lock.writeLock().lock();
537	<	lock.writeLock().unlock();
538	<	}
539	<	});
540	<	Thread t2 = new Thread(new Runnable() {
541	<	public void run() {
542	<	lock.writeLock().lock();
543	<	lock.writeLock().unlock();
585	<	}
586	<	});
534	>	Thread t1 = newStartedThread(new CheckedRunnable() {
535	>	public void realRun() {
536	>	lock.writeLock().lock();
537	>	lock.writeLock().unlock();
538	>	}});
539	>	Thread t2 = newStartedThread(new CheckedRunnable() {
540	>	public void realRun() {
541	>	lock.writeLock().lock();
542	>	lock.writeLock().unlock();
543	>	}});
544
588	–	t1.start();
589	–	t2.start();
545		Thread.sleep(SHORT_DELAY_MS);
546		assertTrue(lock.isWriteLockedByCurrentThread());
547	<	assertTrue(lock.getWriteHoldCount() == 1);
547	>	assertEquals(1, lock.getWriteHoldCount());
548		lock.writeLock().lock();
549	<	assertTrue(lock.getWriteHoldCount() == 2);
549	>	assertEquals(2, lock.getWriteHoldCount());
550		lock.writeLock().unlock();
551		lock.writeLock().lock();
552		lock.writeLock().unlock();
553		lock.writeLock().unlock();
554	<	t1.join(MEDIUM_DELAY_MS);
555	<	t2.join(MEDIUM_DELAY_MS);
601	<	assertTrue(!t1.isAlive());
602	<	assertTrue(!t2.isAlive());
554	>	awaitTermination(t1, LONG_DELAY_MS);
555	>	awaitTermination(t2, LONG_DELAY_MS);
556		}
557
558
#	Line 609 | Line 562 | public class ReentrantReadWriteLockTest
562		public void testTryLockWhenReadLocked() throws InterruptedException {
563		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
564		lock.readLock().lock();
565	<	Thread t = new Thread(new Runnable() {
566	<	public void run() {
567	<	threadAssertTrue(lock.readLock().tryLock());
568	<	lock.readLock().unlock();
569	<	}
617	<	});
565	>	Thread t = newStartedThread(new CheckedRunnable() {
566	>	public void realRun() {
567	>	assertTrue(lock.readLock().tryLock());
568	>	lock.readLock().unlock();
569	>	}});
570
571	<	t.start();
620	<	t.join();
571	>	awaitTermination(t, LONG_DELAY_MS);
572		lock.readLock().unlock();
573		}
574
624	–
625	–
575		/**
576		* write tryLock fails when readlocked
577		*/
578		public void testWriteTryLockWhenReadLocked() throws InterruptedException {
579		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
580		lock.readLock().lock();
581	<	Thread t = new Thread(new Runnable() {
582	<	public void run() {
583	<	threadAssertFalse(lock.writeLock().tryLock());
584	<	}
636	<	});
581	>	Thread t = newStartedThread(new CheckedRunnable() {
582	>	public void realRun() {
583	>	assertFalse(lock.writeLock().tryLock());
584	>	}});
585
586	<	t.start();
639	<	t.join();
586	>	awaitTermination(t, LONG_DELAY_MS);
587		lock.readLock().unlock();
588		}
589
#	Line 647 | Line 594 | public class ReentrantReadWriteLockTest
594		public void testTryLockWhenReadLockedFair() throws InterruptedException {
595		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596		lock.readLock().lock();
597	<	Thread t = new Thread(new Runnable() {
598	<	public void run() {
599	<	threadAssertTrue(lock.readLock().tryLock());
600	<	lock.readLock().unlock();
601	<	}
655	<	});
597	>	Thread t = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	assertTrue(lock.readLock().tryLock());
600	>	lock.readLock().unlock();
601	>	}});
602
603	<	t.start();
658	<	t.join();
603	>	awaitTermination(t, LONG_DELAY_MS);
604		lock.readLock().unlock();
605		}
606
#	Line 667 | Line 612 | public class ReentrantReadWriteLockTest
612		public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
613		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
614		lock.readLock().lock();
615	<	Thread t = new Thread(new Runnable() {
616	<	public void run() {
617	<	threadAssertFalse(lock.writeLock().tryLock());
618	<	}
674	<	});
615	>	Thread t = newStartedThread(new CheckedRunnable() {
616	>	public void realRun() {
617	>	assertFalse(lock.writeLock().tryLock());
618	>	}});
619
620	<	t.start();
677	<	t.join();
620	>	awaitTermination(t, LONG_DELAY_MS);
621		lock.readLock().unlock();
622		}
623
#	Line 686 | Line 629 | public class ReentrantReadWriteLockTest
629		public void testWriteTryLock_Timeout() throws InterruptedException {
630		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
631		lock.writeLock().lock();
632	<	Thread t = new Thread(new CheckedRunnable() {
632	>	Thread t = newStartedThread(new CheckedRunnable() {
633		public void realRun() throws InterruptedException {
634	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
634	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
635		}});
636
637	<	t.start();
695	<	t.join();
637	>	awaitTermination(t, LONG_DELAY_MS);
638		assertTrue(lock.writeLock().isHeldByCurrentThread());
639		lock.writeLock().unlock();
640		}
#	Line 703 | Line 645 | public class ReentrantReadWriteLockTest
645		public void testReadTryLock_Timeout() throws InterruptedException {
646		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
647		lock.writeLock().lock();
648	<	Thread t = new Thread(new CheckedRunnable() {
648	>	Thread t = newStartedThread(new CheckedRunnable() {
649		public void realRun() throws InterruptedException {
650	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
650	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
651		}});
652
653	<	t.start();
712	<	t.join();
653	>	awaitTermination(t, LONG_DELAY_MS);
654		assertTrue(lock.writeLock().isHeldByCurrentThread());
655		lock.writeLock().unlock();
656		}
#	Line 721 | Line 662 | public class ReentrantReadWriteLockTest
662		public void testWriteLockInterruptibly() throws InterruptedException {
663		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
664		lock.writeLock().lockInterruptibly();
665	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
665	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
666		public void realRun() throws InterruptedException {
667		lock.writeLock().lockInterruptibly();
668		}});
669
729	–	t.start();
670		Thread.sleep(SHORT_DELAY_MS);
671		t.interrupt();
672	<	Thread.sleep(SHORT_DELAY_MS);
673	<	t.join();
734	<	lock.writeLock().unlock();
672	>	awaitTermination(t, LONG_DELAY_MS);
673	>	releaseWriteLock(lock);
674		}
675
676		/**
677	<	*  read lockInterruptibly succeeds if lock free else is interruptible
677	>	* read lockInterruptibly succeeds if lock free else is interruptible
678		*/
679		public void testReadLockInterruptibly() throws InterruptedException {
680		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
681		lock.writeLock().lockInterruptibly();
682	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
682	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
683		public void realRun() throws InterruptedException {
684		lock.readLock().lockInterruptibly();
685		}});
686
748	–	t.start();
687		Thread.sleep(SHORT_DELAY_MS);
688		t.interrupt();
689	<	t.join();
690	<	lock.writeLock().unlock();
689	>	awaitTermination(t, LONG_DELAY_MS);
690	>	releaseWriteLock(lock);
691		}
692
693		/**
#	Line 791 | Line 729 | public class ReentrantReadWriteLockTest
729
730
731		/**
732	<	*  timed await without a signal times out
732	>	* timed await without a signal times out
733		*/
734		public void testAwait_Timeout() throws InterruptedException {
735		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
736		final Condition c = lock.writeLock().newCondition();
737		lock.writeLock().lock();
738	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
738	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
739		lock.writeLock().unlock();
740		}
741
#	Line 819 | Line 757 | public class ReentrantReadWriteLockTest
757		public void testAwait() throws InterruptedException {
758		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759		final Condition c = lock.writeLock().newCondition();
760	<	Thread t = new Thread(new CheckedRunnable() {
760	>	Thread t = newStartedThread(new CheckedRunnable() {
761		public void realRun() throws InterruptedException {
762		lock.writeLock().lock();
763		c.await();
764		lock.writeLock().unlock();
765		}});
766
829	–	t.start();
767		Thread.sleep(SHORT_DELAY_MS);
768		lock.writeLock().lock();
769		c.signal();
770		lock.writeLock().unlock();
771	<	t.join(SHORT_DELAY_MS);
835	<	assertFalse(t.isAlive());
771	>	awaitTermination(t, LONG_DELAY_MS);
772		}
773
774		/** A helper class for uninterruptible wait tests */
#	Line 885 | Line 821 | public class ReentrantReadWriteLockTest
821		lock.writeLock().unlock();
822		}
823
824	<	thread.join();
824	>	awaitTermination(thread, LONG_DELAY_MS);
825		assertTrue(thread.interrupted);
890	–	assertFalse(thread.isAlive());
826		}
827
828		/**
#	Line 896 | Line 831 | public class ReentrantReadWriteLockTest
831		public void testAwait_Interrupt() throws InterruptedException {
832		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
833		final Condition c = lock.writeLock().newCondition();
834	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
834	>	final CountDownLatch locked = new CountDownLatch(1);
835	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
836		public void realRun() throws InterruptedException {
837		lock.writeLock().lock();
838	<	c.await();
839	<	lock.writeLock().unlock();
838	>	assertTrue(lock.isWriteLocked());
839	>	locked.countDown();
840	>	try { c.await(); }
841	>	finally { lock.writeLock().unlock(); }
842		}});
843
844	<	t.start();
845	<	Thread.sleep(SHORT_DELAY_MS);
844	>	locked.await();
845	>	while (lock.isWriteLocked())
846	>	Thread.yield();
847		t.interrupt();
848	<	t.join(SHORT_DELAY_MS);
849	<	assertFalse(t.isAlive());
848	>	awaitTermination(t, LONG_DELAY_MS);
849	>	assertFalse(lock.isWriteLocked());
850		}
851
852		/**
#	Line 916 | Line 855 | public class ReentrantReadWriteLockTest
855		public void testAwaitNanos_Interrupt() throws InterruptedException {
856		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
857		final Condition c = lock.writeLock().newCondition();
858	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
858	>	final CountDownLatch locked = new CountDownLatch(1);
859	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
860		public void realRun() throws InterruptedException {
861		lock.writeLock().lock();
862	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
863	<	lock.writeLock().unlock();
862	>	assertTrue(lock.isWriteLocked());
863	>	locked.countDown();
864	>	try { c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); }
865	>	finally { lock.writeLock().unlock(); }
866		}});
867
868	<	t.start();
869	<	Thread.sleep(SHORT_DELAY_MS);
868	>	locked.await();
869	>	while (lock.isWriteLocked())
870	>	Thread.yield();
871		t.interrupt();
872	<	t.join(SHORT_DELAY_MS);
873	<	assertFalse(t.isAlive());
872	>	awaitTermination(t, LONG_DELAY_MS);
873	>	assertFalse(lock.isWriteLocked());
874		}
875
876		/**
#	Line 936 | Line 879 | public class ReentrantReadWriteLockTest
879		public void testAwaitUntil_Interrupt() throws InterruptedException {
880		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
881		final Condition c = lock.writeLock().newCondition();
882	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
882	>	final CountDownLatch locked = new CountDownLatch(1);
883	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
884		public void realRun() throws InterruptedException {
885		lock.writeLock().lock();
886	+	assertTrue(lock.isWriteLocked());
887	+	locked.countDown();
888		java.util.Date d = new java.util.Date();
889	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
890	<	lock.writeLock().unlock();
889	>	try { c.awaitUntil(new java.util.Date(d.getTime() + 10000)); }
890	>	finally { lock.writeLock().unlock(); }
891		}});
892
893	<	t.start();
894	<	Thread.sleep(SHORT_DELAY_MS);
893	>	locked.await();
894	>	while (lock.isWriteLocked())
895	>	Thread.yield();
896		t.interrupt();
897	<	t.join(SHORT_DELAY_MS);
898	<	assertFalse(t.isAlive());
897	>	awaitTermination(t, LONG_DELAY_MS);
898	>	assertFalse(lock.isWriteLocked());
899		}
900
901		/**
#	Line 957 | Line 904 | public class ReentrantReadWriteLockTest
904		public void testSignalAll() throws InterruptedException {
905		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
906		final Condition c = lock.writeLock().newCondition();
907	<	Thread t1 = new Thread(new CheckedRunnable() {
907	>	Thread t1 = newStartedThread(new CheckedRunnable() {
908		public void realRun() throws InterruptedException {
909		lock.writeLock().lock();
910		c.await();
911		lock.writeLock().unlock();
912		}});
913
914	<	Thread t2 = new Thread(new CheckedRunnable() {
914	>	Thread t2 = newStartedThread(new CheckedRunnable() {
915		public void realRun() throws InterruptedException {
916		lock.writeLock().lock();
917		c.await();
918		lock.writeLock().unlock();
919		}});
920
974	–	t1.start();
975	–	t2.start();
921		Thread.sleep(SHORT_DELAY_MS);
922		lock.writeLock().lock();
923		c.signalAll();
924		lock.writeLock().unlock();
925	<	t1.join(SHORT_DELAY_MS);
926	<	t2.join(SHORT_DELAY_MS);
982	<	assertFalse(t1.isAlive());
983	<	assertFalse(t2.isAlive());
925	>	awaitTermination(t1, LONG_DELAY_MS);
926	>	awaitTermination(t2, LONG_DELAY_MS);
927		}
928
929		/**
#	Line 1024 | Line 967 | public class ReentrantReadWriteLockTest
967		lock.writeLock().unlock();
968		Thread.sleep(SHORT_DELAY_MS);
969		assertFalse(lock.hasQueuedThreads());
970	<	t1.join();
971	<	t2.join();
970	>	awaitTermination(t1, LONG_DELAY_MS);
971	>	awaitTermination(t2, LONG_DELAY_MS);
972		}
973
974		/**
#	Line 1065 | Line 1008 | public class ReentrantReadWriteLockTest
1008		assertFalse(sync.hasQueuedThread(t1));
1009		Thread.sleep(SHORT_DELAY_MS);
1010		assertFalse(sync.hasQueuedThread(t2));
1011	<	t1.join();
1012	<	t2.join();
1011	>	awaitTermination(t1, LONG_DELAY_MS);
1012	>	awaitTermination(t2, LONG_DELAY_MS);
1013		}
1014
1015
#	Line 1091 | Line 1034 | public class ReentrantReadWriteLockTest
1034		lock.writeLock().unlock();
1035		Thread.sleep(SHORT_DELAY_MS);
1036		assertEquals(0, lock.getQueueLength());
1037	<	t1.join();
1038	<	t2.join();
1037	>	awaitTermination(t1, LONG_DELAY_MS);
1038	>	awaitTermination(t2, LONG_DELAY_MS);
1039		}
1040
1041		/**
#	Line 1119 | Line 1062 | public class ReentrantReadWriteLockTest
1062		lock.writeLock().unlock();
1063		Thread.sleep(SHORT_DELAY_MS);
1064		assertTrue(lock.getQueuedThreads().isEmpty());
1065	<	t1.join();
1066	<	t2.join();
1065	>	awaitTermination(t1, LONG_DELAY_MS);
1066	>	awaitTermination(t2, LONG_DELAY_MS);
1067		}
1068
1069		/**
#	Line 1241 | Line 1184 | public class ReentrantReadWriteLockTest
1184		public void testHasWaiters() throws InterruptedException {
1185		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1186		final Condition c = lock.writeLock().newCondition();
1187	<	Thread t = new Thread(new CheckedRunnable() {
1187	>	Thread t = newStartedThread(new CheckedRunnable() {
1188		public void realRun() throws InterruptedException {
1189		lock.writeLock().lock();
1190	<	threadAssertFalse(lock.hasWaiters(c));
1191	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1190	>	assertFalse(lock.hasWaiters(c));
1191	>	assertEquals(0, lock.getWaitQueueLength(c));
1192		c.await();
1193		lock.writeLock().unlock();
1194		}});
1195
1253	–	t.start();
1196		Thread.sleep(SHORT_DELAY_MS);
1197		lock.writeLock().lock();
1198		assertTrue(lock.hasWaiters(c));
#	Line 1262 | Line 1204 | public class ReentrantReadWriteLockTest
1204		assertFalse(lock.hasWaiters(c));
1205		assertEquals(0, lock.getWaitQueueLength(c));
1206		lock.writeLock().unlock();
1207	<	t.join(SHORT_DELAY_MS);
1266	<	assertFalse(t.isAlive());
1207	>	awaitTermination(t, LONG_DELAY_MS);
1208		}
1209
1210		/**
#	Line 1272 | Line 1213 | public class ReentrantReadWriteLockTest
1213		public void testGetWaitQueueLength() throws InterruptedException {
1214		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1215		final Condition c = lock.writeLock().newCondition();
1216	<	Thread t = new Thread(new CheckedRunnable() {
1216	>	Thread t = newStartedThread(new CheckedRunnable() {
1217		public void realRun() throws InterruptedException {
1218		lock.writeLock().lock();
1219	<	threadAssertFalse(lock.hasWaiters(c));
1220	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1219	>	assertFalse(lock.hasWaiters(c));
1220	>	assertEquals(0, lock.getWaitQueueLength(c));
1221		c.await();
1222		lock.writeLock().unlock();
1223		}});
1224
1284	–	t.start();
1225		Thread.sleep(SHORT_DELAY_MS);
1226		lock.writeLock().lock();
1227		assertTrue(lock.hasWaiters(c));
#	Line 1293 | Line 1233 | public class ReentrantReadWriteLockTest
1233		assertFalse(lock.hasWaiters(c));
1234		assertEquals(0, lock.getWaitQueueLength(c));
1235		lock.writeLock().unlock();
1236	<	t.join(SHORT_DELAY_MS);
1297	<	assertFalse(t.isAlive());
1236	>	awaitTermination(t, LONG_DELAY_MS);
1237		}
1238
1239
#	Line 1307 | Line 1246 | public class ReentrantReadWriteLockTest
1246		Thread t1 = new Thread(new CheckedRunnable() {
1247		public void realRun() throws InterruptedException {
1248		lock.writeLock().lock();
1249	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1249	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1250		c.await();
1251		lock.writeLock().unlock();
1252		}});
#	Line 1315 | Line 1254 | public class ReentrantReadWriteLockTest
1254		Thread t2 = new Thread(new CheckedRunnable() {
1255		public void realRun() throws InterruptedException {
1256		lock.writeLock().lock();
1257	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1257	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1258		c.await();
1259		lock.writeLock().unlock();
1260		}});
#	Line 1338 | Line 1277 | public class ReentrantReadWriteLockTest
1277		assertFalse(lock.hasWaiters(c));
1278		assertTrue(lock.getWaitingThreads(c).isEmpty());
1279		lock.writeLock().unlock();
1280	<	t1.join(SHORT_DELAY_MS);
1281	<	t2.join(SHORT_DELAY_MS);
1343	<	assertFalse(t1.isAlive());
1344	<	assertFalse(t2.isAlive());
1280	>	awaitTermination(t1, LONG_DELAY_MS);
1281	>	awaitTermination(t2, LONG_DELAY_MS);
1282		}
1283
1284		/**

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