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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 1.57 by dl, Sat May 7 11:15:04 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		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 31 | Line 33 | public class ReentrantReadWriteLockTest
33		}
34		}
35
34	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
#	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	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
73	+	*/
74	+	void waitForQueuedThread(ReentrantReadWriteLock lock, Thread t) {
75	+	long startTime = System.nanoTime();
76	+	while (!lock.hasQueuedThread(t)) {
77	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
78	+	throw new AssertionError("timed out");
79	+	Thread.yield();
80	+	}
81	+	}
82	+
83	+	/**
84	+	* Checks that lock is not write-locked.
85	+	*/
86	+	void assertNotWriteLocked(ReentrantReadWriteLock lock) {
87	+	assertFalse(lock.isWriteLocked());
88	+	assertFalse(lock.isWriteLockedByCurrentThread());
89	+	assertEquals(0, lock.getWriteHoldCount());
90	+	}
91	+
92	+	/**
93	+	* Checks that condition c has no waiters.
94	+	*/
95	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
96	+	assertHasWaiters(lock, c, new Thread[] {});
97	+	}
98	+
99	+	/**
100	+	* Checks that condition c has exactly the given waiter threads.
101	+	*/
102	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
103	+	Thread... threads) {
104	+	lock.writeLock().lock();
105	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
106	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
107	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
108	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
109	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
110	+	new HashSet<Thread>(Arrays.asList(threads)));
111	+	lock.writeLock().unlock();
112	+	}
113	+
114	+	/**
115		* Constructor sets given fairness, and is in unlocked state
116		*/
117		public void testConstructor() {
#	Line 100 | Line 154 | public class ReentrantReadWriteLockTest
154		assertEquals(0, rl.getReadLockCount());
155		}
156
103	–
157		/**
158		* locking an unlocked fair lock succeeds
159		*/
#	Line 171 | Line 224 | public class ReentrantReadWriteLockTest
224		}
225		}
226
174	–
227		/**
228		* write-unlocking an unlocked lock throws IllegalMonitorStateException
229		*/
230	<	public void testUnlock_IllegalMonitorStateException() {
230	>	public void testWriteUnlock_IllegalMonitorStateException() {
231		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
232		try {
233		rl.writeLock().unlock();
#	Line 183 | Line 235 | public class ReentrantReadWriteLockTest
235		} catch (IllegalMonitorStateException success) {}
236		}
237
238	+	/**
239	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
240	+	*/
241	+	public void testReadUnlock_IllegalMonitorStateException() {
242	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
243	+	try {
244	+	rl.readLock().unlock();
245	+	shouldThrow();
246	+	} catch (IllegalMonitorStateException success) {}
247	+	}
248
249		/**
250		* write-lockInterruptibly is interruptible
251		*/
252		public void testWriteLockInterruptibly_Interrupted() throws Exception {
253		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
254	>	lock.writeLock().lock();
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256		public void realRun() throws InterruptedException {
257		lock.writeLock().lockInterruptibly();
195	–	lock.writeLock().unlock();
196	–	lock.writeLock().lockInterruptibly();
197	–	lock.writeLock().unlock();
258		}});
259
260	<	lock.writeLock().lock();
201	<	t.start();
202	<	Thread.sleep(SHORT_DELAY_MS);
260	>	waitForQueuedThread(lock, t);
261		t.interrupt();
262	<	Thread.sleep(SHORT_DELAY_MS);
263	<	lock.writeLock().unlock();
206	<	t.join();
262	>	awaitTermination(t);
263	>	releaseWriteLock(lock);
264		}
265
266		/**
#	Line 212 | Line 269 | public class ReentrantReadWriteLockTest
269		public void testWriteTryLock_Interrupted() throws InterruptedException {
270		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271		lock.writeLock().lock();
272	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
272	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
273		public void realRun() throws InterruptedException {
274	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
274	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
275		}});
276
277	<	t.start();
277	>	waitForQueuedThread(lock, t);
278		t.interrupt();
279	<	lock.writeLock().unlock();
280	<	t.join();
279	>	awaitTermination(t);
280	>	releaseWriteLock(lock);
281		}
282
283		/**
#	Line 229 | Line 286 | public class ReentrantReadWriteLockTest
286		public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
287		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
288		lock.writeLock().lock();
289	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
289	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
290		public void realRun() throws InterruptedException {
291		lock.readLock().lockInterruptibly();
292		}});
293
294	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
294	>	waitForQueuedThread(lock, t);
295		t.interrupt();
296	<	Thread.sleep(SHORT_DELAY_MS);
297	<	lock.writeLock().unlock();
242	<	t.join();
296	>	awaitTermination(t);
297	>	releaseWriteLock(lock);
298		}
299
300		/**
#	Line 248 | Line 303 | public class ReentrantReadWriteLockTest
303		public void testReadTryLock_Interrupted() throws InterruptedException {
304		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
305		lock.writeLock().lock();
306	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
306	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307		public void realRun() throws InterruptedException {
308	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
308	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
309		}});
310
311	<	t.start();
311	>	waitForQueuedThread(lock, t);
312		t.interrupt();
313	<	t.join();
313	>	awaitTermination(t);
314	>	releaseWriteLock(lock);
315		}
316
261	–
317		/**
318		* write-tryLock fails if locked
319		*/
320		public void testWriteTryLockWhenLocked() throws InterruptedException {
321		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
322		lock.writeLock().lock();
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
325	<	threadAssertFalse(lock.writeLock().tryLock());
326	<	}
272	<	});
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	assertFalse(lock.writeLock().tryLock());
326	>	}});
327
328	<	t.start();
329	<	t.join();
276	<	lock.writeLock().unlock();
328	>	awaitTermination(t);
329	>	releaseWriteLock(lock);
330		}
331
332		/**
#	Line 282 | Line 335 | public class ReentrantReadWriteLockTest
335		public void testReadTryLockWhenLocked() throws InterruptedException {
336		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
337		lock.writeLock().lock();
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	threadAssertFalse(lock.readLock().tryLock());
341	<	}
289	<	});
338	>	Thread t = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() {
340	>	assertFalse(lock.readLock().tryLock());
341	>	}});
342
343	<	t.start();
344	<	t.join();
293	<	lock.writeLock().unlock();
343	>	awaitTermination(t);
344	>	releaseWriteLock(lock);
345		}
346
347		/**
#	Line 299 | Line 350 | public class ReentrantReadWriteLockTest
350		public void testMultipleReadLocks() throws InterruptedException {
351		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
352		lock.readLock().lock();
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	threadAssertTrue(lock.readLock().tryLock());
356	<	lock.readLock().unlock();
357	<	}
307	<	});
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() {
355	>	assertTrue(lock.readLock().tryLock());
356	>	lock.readLock().unlock();
357	>	}});
358
359	<	t.start();
310	<	t.join();
359	>	awaitTermination(t);
360		lock.readLock().unlock();
361		}
362
363		/**
364	<	* A writelock succeeds after reading threads unlock
364	>	* A writelock succeeds only after reading threads unlock
365		*/
366		public void testWriteAfterMultipleReadLocks() throws InterruptedException {
367		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368		lock.readLock().lock();
369	<	Thread t1 = new Thread(new Runnable() {
370	<	public void run() {
371	<	lock.readLock().lock();
372	<	lock.readLock().unlock();
373	<	}
374	<	});
375	<	Thread t2 = new Thread(new Runnable() {
376	<	public void run() {
377	<	lock.writeLock().lock();
378	<	lock.writeLock().unlock();
379	<	}
331	<	});
332	<
333	<	t1.start();
334	<	t2.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
369	>	Thread t1 = newStartedThread(new CheckedRunnable() {
370	>	public void realRun() {
371	>	lock.readLock().lock();
372	>	lock.readLock().unlock();
373	>	}});
374	>	Thread t2 = newStartedThread(new CheckedRunnable() {
375	>	public void realRun() {
376	>	lock.writeLock().lock();
377	>	lock.writeLock().unlock();
378	>	}});
379	>	delay(SHORT_DELAY_MS);
380		lock.readLock().unlock();
381	<	t1.join(MEDIUM_DELAY_MS);
382	<	t2.join(MEDIUM_DELAY_MS);
383	<	assertTrue(!t1.isAlive());
340	<	assertTrue(!t2.isAlive());
381	>	awaitTermination(t1);
382	>	awaitTermination(t2);
383	>	assertNotWriteLocked(lock);
384		}
385
386		/**
387	<	* Readlocks succeed after a writing thread unlocks
387	>	* Readlocks succeed only after a writing thread unlocks
388		*/
389		public void testReadAfterWriteLock() throws InterruptedException {
390		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391		lock.writeLock().lock();
392	<	Thread t1 = new Thread(new Runnable() {
393	<	public void run() {
394	<	lock.readLock().lock();
395	<	lock.readLock().unlock();
396	<	}
397	<	});
398	<	Thread t2 = new Thread(new Runnable() {
399	<	public void run() {
400	<	lock.readLock().lock();
401	<	lock.readLock().unlock();
359	<	}
360	<	});
392	>	Thread t1 = newStartedThread(new CheckedRunnable() {
393	>	public void realRun() {
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	}});
397	>	Thread t2 = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}});
402
403	<	t1.start();
404	<	t2.start();
405	<	Thread.sleep(SHORT_DELAY_MS);
406	<	lock.writeLock().unlock();
407	<	t1.join(MEDIUM_DELAY_MS);
367	<	t2.join(MEDIUM_DELAY_MS);
368	<	assertTrue(!t1.isAlive());
369	<	assertTrue(!t2.isAlive());
403	>	waitForQueuedThread(lock, t1);
404	>	waitForQueuedThread(lock, t2);
405	>	releaseWriteLock(lock);
406	>	awaitTermination(t1);
407	>	awaitTermination(t2);
408		}
409
410		/**
#	Line 387 | Line 425 | public class ReentrantReadWriteLockTest
425		public void testReadHoldingWriteLock2() throws InterruptedException {
426		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
427		lock.writeLock().lock();
390	–	Thread t1 = new Thread(new Runnable() {
391	–	public void run() {
392	–	lock.readLock().lock();
393	–	lock.readLock().unlock();
394	–	}
395	–	});
396	–	Thread t2 = new Thread(new Runnable() {
397	–	public void run() {
398	–	lock.readLock().lock();
399	–	lock.readLock().unlock();
400	–	}
401	–	});
402	–
403	–	t1.start();
404	–	t2.start();
428		lock.readLock().lock();
429		lock.readLock().unlock();
430	<	Thread.sleep(SHORT_DELAY_MS);
430	>
431	>	Thread t1 = newStartedThread(new CheckedRunnable() {
432	>	public void realRun() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}});
436	>	Thread t2 = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() {
438	>	lock.readLock().lock();
439	>	lock.readLock().unlock();
440	>	}});
441	>
442	>	waitForQueuedThread(lock, t1);
443	>	waitForQueuedThread(lock, t2);
444	>	assertTrue(lock.isWriteLockedByCurrentThread());
445		lock.readLock().lock();
446		lock.readLock().unlock();
447	<	lock.writeLock().unlock();
448	<	t1.join(MEDIUM_DELAY_MS);
449	<	t2.join(MEDIUM_DELAY_MS);
413	<	assertTrue(!t1.isAlive());
414	<	assertTrue(!t2.isAlive());
447	>	releaseWriteLock(lock);
448	>	awaitTermination(t1);
449	>	awaitTermination(t2);
450		}
451
452		/**
453	<	*  Read lock succeeds if write locked by current thread even if
453	>	* Read lock succeeds if write locked by current thread even if
454		* other threads are waiting for writelock
455		*/
456		public void testReadHoldingWriteLock3() throws InterruptedException {
457		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458		lock.writeLock().lock();
424	–	Thread t1 = new Thread(new Runnable() {
425	–	public void run() {
426	–	lock.writeLock().lock();
427	–	lock.writeLock().unlock();
428	–	}
429	–	});
430	–	Thread t2 = new Thread(new Runnable() {
431	–	public void run() {
432	–	lock.writeLock().lock();
433	–	lock.writeLock().unlock();
434	–	}
435	–	});
436	–
437	–	t1.start();
438	–	t2.start();
459		lock.readLock().lock();
460		lock.readLock().unlock();
461	<	Thread.sleep(SHORT_DELAY_MS);
461	>
462	>	Thread t1 = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() {
464	>	lock.writeLock().lock();
465	>	lock.writeLock().unlock();
466	>	}});
467	>	Thread t2 = newStartedThread(new CheckedRunnable() {
468	>	public void realRun() {
469	>	lock.writeLock().lock();
470	>	lock.writeLock().unlock();
471	>	}});
472	>
473	>	waitForQueuedThread(lock, t1);
474	>	waitForQueuedThread(lock, t2);
475	>	assertTrue(lock.isWriteLockedByCurrentThread());
476		lock.readLock().lock();
477		lock.readLock().unlock();
478	<	lock.writeLock().unlock();
479	<	t1.join(MEDIUM_DELAY_MS);
480	<	t2.join(MEDIUM_DELAY_MS);
447	<	assertTrue(!t1.isAlive());
448	<	assertTrue(!t2.isAlive());
478	>	releaseWriteLock(lock);
479	>	awaitTermination(t1);
480	>	awaitTermination(t2);
481		}
482
451	–
483		/**
484	<	*  Write lock succeeds if write locked by current thread even if
484	>	* Write lock succeeds if write locked by current thread even if
485		* other threads are waiting for writelock
486		*/
487		public void testWriteHoldingWriteLock4() throws InterruptedException {
488		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
489		lock.writeLock().lock();
459	–	Thread t1 = new Thread(new Runnable() {
460	–	public void run() {
461	–	lock.writeLock().lock();
462	–	lock.writeLock().unlock();
463	–	}
464	–	});
465	–	Thread t2 = new Thread(new Runnable() {
466	–	public void run() {
467	–	lock.writeLock().lock();
468	–	lock.writeLock().unlock();
469	–	}
470	–	});
471	–
472	–	t1.start();
473	–	t2.start();
490		lock.writeLock().lock();
491		lock.writeLock().unlock();
492	<	Thread.sleep(SHORT_DELAY_MS);
492	>
493	>	Thread t1 = newStartedThread(new CheckedRunnable() {
494	>	public void realRun() {
495	>	lock.writeLock().lock();
496	>	lock.writeLock().unlock();
497	>	}});
498	>	Thread t2 = newStartedThread(new CheckedRunnable() {
499	>	public void realRun() {
500	>	lock.writeLock().lock();
501	>	lock.writeLock().unlock();
502	>	}});
503	>
504	>	waitForQueuedThread(lock, t1);
505	>	waitForQueuedThread(lock, t2);
506	>	assertTrue(lock.isWriteLockedByCurrentThread());
507	>	assertEquals(1, lock.getWriteHoldCount());
508		lock.writeLock().lock();
509	+	assertTrue(lock.isWriteLockedByCurrentThread());
510	+	assertEquals(2, lock.getWriteHoldCount());
511		lock.writeLock().unlock();
512	<	lock.writeLock().unlock();
513	<	t1.join(MEDIUM_DELAY_MS);
514	<	t2.join(MEDIUM_DELAY_MS);
482	<	assertTrue(!t1.isAlive());
483	<	assertTrue(!t2.isAlive());
512	>	releaseWriteLock(lock);
513	>	awaitTermination(t1);
514	>	awaitTermination(t2);
515		}
516
486	–
517		/**
518		* Fair Read trylock succeeds if write locked by current thread
519		*/
#	Line 502 | Line 532 | public class ReentrantReadWriteLockTest
532		public void testReadHoldingWriteLockFair2() throws InterruptedException {
533		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
534		lock.writeLock().lock();
505	–	Thread t1 = new Thread(new Runnable() {
506	–	public void run() {
507	–	lock.readLock().lock();
508	–	lock.readLock().unlock();
509	–	}
510	–	});
511	–	Thread t2 = new Thread(new Runnable() {
512	–	public void run() {
513	–	lock.readLock().lock();
514	–	lock.readLock().unlock();
515	–	}
516	–	});
517	–
518	–	t1.start();
519	–	t2.start();
535		lock.readLock().lock();
536		lock.readLock().unlock();
537	<	Thread.sleep(SHORT_DELAY_MS);
537	>
538	>	Thread t1 = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() {
540	>	lock.readLock().lock();
541	>	lock.readLock().unlock();
542	>	}});
543	>	Thread t2 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() {
545	>	lock.readLock().lock();
546	>	lock.readLock().unlock();
547	>	}});
548	>
549	>	waitForQueuedThread(lock, t1);
550	>	waitForQueuedThread(lock, t2);
551	>	assertTrue(lock.isWriteLockedByCurrentThread());
552		lock.readLock().lock();
553		lock.readLock().unlock();
554	<	lock.writeLock().unlock();
555	<	t1.join(MEDIUM_DELAY_MS);
556	<	t2.join(MEDIUM_DELAY_MS);
528	<	assertTrue(!t1.isAlive());
529	<	assertTrue(!t2.isAlive());
554	>	releaseWriteLock(lock);
555	>	awaitTermination(t1);
556	>	awaitTermination(t2);
557		}
558
532	–
559		/**
560		* Fair Read lock succeeds if write locked by current thread even if
561		* other threads are waiting for writelock
#	Line 537 | Line 563 | public class ReentrantReadWriteLockTest
563		public void testReadHoldingWriteLockFair3() throws InterruptedException {
564		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
565		lock.writeLock().lock();
540	–	Thread t1 = new Thread(new Runnable() {
541	–	public void run() {
542	–	lock.writeLock().lock();
543	–	lock.writeLock().unlock();
544	–	}
545	–	});
546	–	Thread t2 = new Thread(new Runnable() {
547	–	public void run() {
548	–	lock.writeLock().lock();
549	–	lock.writeLock().unlock();
550	–	}
551	–	});
552	–
553	–	t1.start();
554	–	t2.start();
566		lock.readLock().lock();
567		lock.readLock().unlock();
568	<	Thread.sleep(SHORT_DELAY_MS);
568	>
569	>	Thread t1 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.writeLock().lock();
572	>	lock.writeLock().unlock();
573	>	}});
574	>	Thread t2 = newStartedThread(new CheckedRunnable() {
575	>	public void realRun() {
576	>	lock.writeLock().lock();
577	>	lock.writeLock().unlock();
578	>	}});
579	>
580	>	waitForQueuedThread(lock, t1);
581	>	waitForQueuedThread(lock, t2);
582	>	assertTrue(lock.isWriteLockedByCurrentThread());
583		lock.readLock().lock();
584		lock.readLock().unlock();
585	<	lock.writeLock().unlock();
586	<	t1.join(MEDIUM_DELAY_MS);
587	<	t2.join(MEDIUM_DELAY_MS);
563	<	assertTrue(!t1.isAlive());
564	<	assertTrue(!t2.isAlive());
585	>	releaseWriteLock(lock);
586	>	awaitTermination(t1);
587	>	awaitTermination(t2);
588		}
589
567	–
590		/**
591		* Fair Write lock succeeds if write locked by current thread even if
592		* other threads are waiting for writelock
#	Line 572 | Line 594 | public class ReentrantReadWriteLockTest
594		public void testWriteHoldingWriteLockFair4() throws InterruptedException {
595		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
596		lock.writeLock().lock();
597	<	Thread t1 = new Thread(new Runnable() {
598	<	public void run() {
599	<	lock.writeLock().lock();
600	<	lock.writeLock().unlock();
601	<	}
602	<	});
603	<	Thread t2 = new Thread(new Runnable() {
604	<	public void run() {
605	<	lock.writeLock().lock();
606	<	lock.writeLock().unlock();
585	<	}
586	<	});
597	>	Thread t1 = newStartedThread(new CheckedRunnable() {
598	>	public void realRun() {
599	>	lock.writeLock().lock();
600	>	lock.writeLock().unlock();
601	>	}});
602	>	Thread t2 = newStartedThread(new CheckedRunnable() {
603	>	public void realRun() {
604	>	lock.writeLock().lock();
605	>	lock.writeLock().unlock();
606	>	}});
607
608	<	t1.start();
609	<	t2.start();
590	<	Thread.sleep(SHORT_DELAY_MS);
608	>	waitForQueuedThread(lock, t1);
609	>	waitForQueuedThread(lock, t2);
610		assertTrue(lock.isWriteLockedByCurrentThread());
611	<	assertTrue(lock.getWriteHoldCount() == 1);
611	>	assertEquals(1, lock.getWriteHoldCount());
612		lock.writeLock().lock();
613	<	assertTrue(lock.getWriteHoldCount() == 2);
613	>	assertEquals(2, lock.getWriteHoldCount());
614		lock.writeLock().unlock();
615		lock.writeLock().lock();
616		lock.writeLock().unlock();
617	<	lock.writeLock().unlock();
618	<	t1.join(MEDIUM_DELAY_MS);
619	<	t2.join(MEDIUM_DELAY_MS);
601	<	assertTrue(!t1.isAlive());
602	<	assertTrue(!t2.isAlive());
617	>	releaseWriteLock(lock);
618	>	awaitTermination(t1);
619	>	awaitTermination(t2);
620		}
621
605	–
622		/**
623		* Read tryLock succeeds if readlocked but not writelocked
624		*/
625		public void testTryLockWhenReadLocked() throws InterruptedException {
626		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
627		lock.readLock().lock();
628	<	Thread t = new Thread(new Runnable() {
629	<	public void run() {
630	<	threadAssertTrue(lock.readLock().tryLock());
631	<	lock.readLock().unlock();
632	<	}
617	<	});
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertTrue(lock.readLock().tryLock());
631	>	lock.readLock().unlock();
632	>	}});
633
634	<	t.start();
620	<	t.join();
634	>	awaitTermination(t);
635		lock.readLock().unlock();
636		}
637
624	–
625	–
638		/**
639		* write tryLock fails when readlocked
640		*/
641		public void testWriteTryLockWhenReadLocked() throws InterruptedException {
642		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
643		lock.readLock().lock();
644	<	Thread t = new Thread(new Runnable() {
645	<	public void run() {
646	<	threadAssertFalse(lock.writeLock().tryLock());
647	<	}
636	<	});
644	>	Thread t = newStartedThread(new CheckedRunnable() {
645	>	public void realRun() {
646	>	assertFalse(lock.writeLock().tryLock());
647	>	}});
648
649	<	t.start();
639	<	t.join();
649	>	awaitTermination(t);
650		lock.readLock().unlock();
651		}
652
643	–
653		/**
654		* Fair Read tryLock succeeds if readlocked but not writelocked
655		*/
656		public void testTryLockWhenReadLockedFair() throws InterruptedException {
657		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
658		lock.readLock().lock();
659	<	Thread t = new Thread(new Runnable() {
660	<	public void run() {
661	<	threadAssertTrue(lock.readLock().tryLock());
662	<	lock.readLock().unlock();
663	<	}
655	<	});
659	>	Thread t = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	assertTrue(lock.readLock().tryLock());
662	>	lock.readLock().unlock();
663	>	}});
664
665	<	t.start();
658	<	t.join();
665	>	awaitTermination(t);
666		lock.readLock().unlock();
667		}
668
662	–
663	–
669		/**
670		* Fair write tryLock fails when readlocked
671		*/
672		public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
673		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674		lock.readLock().lock();
675	<	Thread t = new Thread(new Runnable() {
676	<	public void run() {
677	<	threadAssertFalse(lock.writeLock().tryLock());
678	<	}
674	<	});
675	>	Thread t = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() {
677	>	assertFalse(lock.writeLock().tryLock());
678	>	}});
679
680	<	t.start();
677	<	t.join();
680	>	awaitTermination(t);
681		lock.readLock().unlock();
682		}
683
681	–
682	–
684		/**
685		* write timed tryLock times out if locked
686		*/
687		public void testWriteTryLock_Timeout() throws InterruptedException {
688		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
689		lock.writeLock().lock();
690	<	Thread t = new Thread(new CheckedRunnable() {
690	>	Thread t = newStartedThread(new CheckedRunnable() {
691		public void realRun() throws InterruptedException {
692	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
692	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
693		}});
694
695	<	t.start();
695	<	t.join();
695	>	awaitTermination(t);
696		assertTrue(lock.writeLock().isHeldByCurrentThread());
697		lock.writeLock().unlock();
698		}
#	Line 703 | Line 703 | public class ReentrantReadWriteLockTest
703		public void testReadTryLock_Timeout() throws InterruptedException {
704		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
705		lock.writeLock().lock();
706	<	Thread t = new Thread(new CheckedRunnable() {
706	>	Thread t = newStartedThread(new CheckedRunnable() {
707		public void realRun() throws InterruptedException {
708	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
708	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
709		}});
710
711	<	t.start();
712	<	t.join();
711	>	awaitTermination(t);
712		assertTrue(lock.writeLock().isHeldByCurrentThread());
713		lock.writeLock().unlock();
714		}
715
717	–
716		/**
717		* write lockInterruptibly succeeds if lock free else is interruptible
718		*/
719		public void testWriteLockInterruptibly() throws InterruptedException {
720		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
721		lock.writeLock().lockInterruptibly();
722	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
722	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
723		public void realRun() throws InterruptedException {
724		lock.writeLock().lockInterruptibly();
725		}});
726
727	<	t.start();
730	<	Thread.sleep(SHORT_DELAY_MS);
727	>	waitForQueuedThread(lock, t);
728		t.interrupt();
729	<	Thread.sleep(SHORT_DELAY_MS);
730	<	t.join();
734	<	lock.writeLock().unlock();
729	>	awaitTermination(t);
730	>	releaseWriteLock(lock);
731		}
732
733		/**
734	<	*  read lockInterruptibly succeeds if lock free else is interruptible
734	>	* read lockInterruptibly succeeds if lock free else is interruptible
735		*/
736		public void testReadLockInterruptibly() throws InterruptedException {
737		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
738		lock.writeLock().lockInterruptibly();
739	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
739	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
740		public void realRun() throws InterruptedException {
741		lock.readLock().lockInterruptibly();
742		}});
743
744	<	t.start();
749	<	Thread.sleep(SHORT_DELAY_MS);
744	>	waitForQueuedThread(lock, t);
745		t.interrupt();
746	<	t.join();
747	<	lock.writeLock().unlock();
746	>	awaitTermination(t);
747	>	releaseWriteLock(lock);
748		}
749
750		/**
#	Line 762 | Line 757 | public class ReentrantReadWriteLockTest
757		c.await();
758		shouldThrow();
759		} catch (IllegalMonitorStateException success) {}
760	+	try {
761	+	c.await(LONG_DELAY_MS, MILLISECONDS);
762	+	shouldThrow();
763	+	} catch (IllegalMonitorStateException success) {}
764	+	try {
765	+	c.awaitNanos(100);
766	+	shouldThrow();
767	+	} catch (IllegalMonitorStateException success) {}
768	+	try {
769	+	c.awaitUninterruptibly();
770	+	shouldThrow();
771	+	} catch (IllegalMonitorStateException success) {}
772		}
773
774		/**
#	Line 777 | Line 784 | public class ReentrantReadWriteLockTest
784		}
785
786		/**
787	+	* Calling signalAll without holding lock throws IllegalMonitorStateException
788	+	*/
789	+	public void testSignalAll_IllegalMonitor() {
790	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
791	+	final Condition c = lock.writeLock().newCondition();
792	+	try {
793	+	c.signalAll();
794	+	shouldThrow();
795	+	} catch (IllegalMonitorStateException success) {}
796	+	}
797	+
798	+	/**
799		* awaitNanos without a signal times out
800		*/
801		public void testAwaitNanos_Timeout() throws InterruptedException {
802		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803		final Condition c = lock.writeLock().newCondition();
785	–
804		lock.writeLock().lock();
805	<	long t = c.awaitNanos(100);
806	<	assertTrue(t <= 0);
805	>	long startTime = System.nanoTime();
806	>	long timeoutMillis = 10;
807	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
808	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
809	>	assertTrue(nanosRemaining <= 0);
810	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
811		lock.writeLock().unlock();
812		}
813
792	–
814		/**
815	<	*  timed await without a signal times out
815	>	* timed await without a signal times out
816		*/
817		public void testAwait_Timeout() throws InterruptedException {
818		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819		final Condition c = lock.writeLock().newCondition();
820		lock.writeLock().lock();
821	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
821	>	long startTime = System.nanoTime();
822	>	long timeoutMillis = 10;
823	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
824	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
825		lock.writeLock().unlock();
826		}
827
#	Line 819 | Line 843 | public class ReentrantReadWriteLockTest
843		public void testAwait() throws InterruptedException {
844		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845		final Condition c = lock.writeLock().newCondition();
846	<	Thread t = new Thread(new CheckedRunnable() {
846	>	final CountDownLatch locked = new CountDownLatch(1);
847	>	Thread t = newStartedThread(new CheckedRunnable() {
848		public void realRun() throws InterruptedException {
849		lock.writeLock().lock();
850	+	locked.countDown();
851		c.await();
852		lock.writeLock().unlock();
853		}});
854
855	<	t.start();
830	<	Thread.sleep(SHORT_DELAY_MS);
855	>	locked.await();
856		lock.writeLock().lock();
857		c.signal();
858	+	assertTrue(t.isAlive());
859		lock.writeLock().unlock();
860	<	t.join(SHORT_DELAY_MS);
835	<	assertFalse(t.isAlive());
836	<	}
837	<
838	<	/** A helper class for uninterruptible wait tests */
839	<	class UninterruptableThread extends Thread {
840	<	private Lock lock;
841	<	private Condition c;
842	<
843	<	public volatile boolean canAwake = false;
844	<	public volatile boolean interrupted = false;
845	<	public volatile boolean lockStarted = false;
846	<
847	<	public UninterruptableThread(Lock lock, Condition c) {
848	<	this.lock = lock;
849	<	this.c = c;
850	<	}
851	<
852	<	public synchronized void run() {
853	<	lock.lock();
854	<	lockStarted = true;
855	<
856	<	while (!canAwake) {
857	<	c.awaitUninterruptibly();
858	<	}
859	<
860	<	interrupted = isInterrupted();
861	<	lock.unlock();
862	<	}
860	>	awaitTermination(t);
861		}
862
863		/**
#	Line 868 | Line 866 | public class ReentrantReadWriteLockTest
866		public void testAwaitUninterruptibly() throws InterruptedException {
867		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868		final Condition c = lock.writeLock().newCondition();
869	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
870	<
871	<	thread.start();
872	<
873	<	while (!thread.lockStarted) {
874	<	Thread.sleep(100);
875	<	}
869	>	final CountDownLatch locked = new CountDownLatch(1);
870	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
871	>	Thread t = newStartedThread(new CheckedRunnable() {
872	>	public void realRun() {
873	>	lock.writeLock().lock();
874	>	locked.countDown();
875	>	c.awaitUninterruptibly();
876	>	assertTrue(Thread.interrupted());
877	>	lock.writeLock().unlock();
878	>	}});
879
880	+	locked.await();
881		lock.writeLock().lock();
882	<	try {
883	<	thread.interrupt();
884	<	thread.canAwake = true;
885	<	c.signal();
886	<	} finally {
887	<	lock.writeLock().unlock();
888	<	}
889	<
888	<	thread.join();
889	<	assertTrue(thread.interrupted);
890	<	assertFalse(thread.isAlive());
882	>	lock.writeLock().unlock();
883	>	t.interrupt();
884	>	t.join(10);
885	>	assertTrue(t.isAlive());
886	>	lock.writeLock().lock();
887	>	c.signal();
888	>	lock.writeLock().unlock();
889	>	awaitTermination(t);
890		}
891
892		/**
893		* await is interruptible
894		*/
895		public void testAwait_Interrupt() throws InterruptedException {
896	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
897		final Condition c = lock.writeLock().newCondition();
898	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
898	>	final CountDownLatch locked = new CountDownLatch(1);
899	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
900		public void realRun() throws InterruptedException {
901		lock.writeLock().lock();
902	<	c.await();
903	<	lock.writeLock().unlock();
902	>	assertTrue(lock.isWriteLocked());
903	>	assertTrue(lock.isWriteLockedByCurrentThread());
904	>	assertHasNoWaiters(lock, c);
905	>	locked.countDown();
906	>	try {
907	>	c.await();
908	>	} finally {
909	>	assertTrue(lock.isWriteLocked());
910	>	assertTrue(lock.isWriteLockedByCurrentThread());
911	>	assertHasNoWaiters(lock, c);
912	>	lock.writeLock().unlock();
913	>	assertFalse(Thread.interrupted());
914	>	}
915		}});
916
917	<	t.start();
918	<	Thread.sleep(SHORT_DELAY_MS);
917	>	locked.await();
918	>	assertHasWaiters(lock, c, t);
919		t.interrupt();
920	<	t.join(SHORT_DELAY_MS);
921	<	assertFalse(t.isAlive());
920	>	awaitTermination(t);
921	>	assertFalse(lock.isWriteLocked());
922		}
923
924		/**
925		* awaitNanos is interruptible
926		*/
927		public void testAwaitNanos_Interrupt() throws InterruptedException {
928	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
929		final Condition c = lock.writeLock().newCondition();
930	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
930	>	final CountDownLatch locked = new CountDownLatch(1);
931	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
932		public void realRun() throws InterruptedException {
933		lock.writeLock().lock();
934	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
935	<	lock.writeLock().unlock();
934	>	assertTrue(lock.isWriteLocked());
935	>	assertTrue(lock.isWriteLockedByCurrentThread());
936	>	assertHasNoWaiters(lock, c);
937	>	locked.countDown();
938	>	try {
939	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
940	>	} finally {
941	>	assertTrue(lock.isWriteLocked());
942	>	assertTrue(lock.isWriteLockedByCurrentThread());
943	>	assertHasNoWaiters(lock, c);
944	>	lock.writeLock().unlock();
945	>	assertFalse(Thread.interrupted());
946	>	}
947		}});
948
949	<	t.start();
950	<	Thread.sleep(SHORT_DELAY_MS);
949	>	locked.await();
950	>	assertHasWaiters(lock, c, t);
951		t.interrupt();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
952	>	awaitTermination(t);
953	>	assertFalse(lock.isWriteLocked());
954		}
955
956		/**
957		* awaitUntil is interruptible
958		*/
959		public void testAwaitUntil_Interrupt() throws InterruptedException {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
961		final Condition c = lock.writeLock().newCondition();
962	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
962	>	final CountDownLatch locked = new CountDownLatch(1);
963	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
964		public void realRun() throws InterruptedException {
965		lock.writeLock().lock();
966	+	assertTrue(lock.isWriteLocked());
967	+	assertTrue(lock.isWriteLockedByCurrentThread());
968	+	assertHasNoWaiters(lock, c);
969	+	locked.countDown();
970		java.util.Date d = new java.util.Date();
971	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
972	<	lock.writeLock().unlock();
971	>	try {
972	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
973	>	} finally {
974	>	assertTrue(lock.isWriteLocked());
975	>	assertTrue(lock.isWriteLockedByCurrentThread());
976	>	assertHasNoWaiters(lock, c);
977	>	lock.writeLock().unlock();
978	>	assertFalse(Thread.interrupted());
979	>	}
980		}});
981
982	<	t.start();
983	<	Thread.sleep(SHORT_DELAY_MS);
982	>	locked.await();
983	>	assertHasWaiters(lock, c, t);
984		t.interrupt();
985	<	t.join(SHORT_DELAY_MS);
986	<	assertFalse(t.isAlive());
985	>	awaitTermination(t);
986	>	assertFalse(lock.isWriteLocked());
987		}
988
989		/**
990		* signalAll wakes up all threads
991		*/
992		public void testSignalAll() throws InterruptedException {
993	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
993	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
994		final Condition c = lock.writeLock().newCondition();
995	<	Thread t1 = new Thread(new CheckedRunnable() {
995	>	final CountDownLatch locked = new CountDownLatch(2);
996	>	final Lock writeLock = lock.writeLock();
997	>	Thread t1 = newStartedThread(new CheckedRunnable() {
998		public void realRun() throws InterruptedException {
999	<	lock.writeLock().lock();
999	>	writeLock.lock();
1000	>	locked.countDown();
1001		c.await();
1002	<	lock.writeLock().unlock();
1002	>	writeLock.unlock();
1003		}});
1004
1005	<	Thread t2 = new Thread(new CheckedRunnable() {
1005	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1006		public void realRun() throws InterruptedException {
1007	<	lock.writeLock().lock();
1007	>	writeLock.lock();
1008	>	locked.countDown();
1009		c.await();
1010	<	lock.writeLock().unlock();
1010	>	writeLock.unlock();
1011		}});
1012
1013	<	t1.start();
1014	<	t2.start();
1015	<	Thread.sleep(SHORT_DELAY_MS);
977	<	lock.writeLock().lock();
1013	>	locked.await();
1014	>	writeLock.lock();
1015	>	assertHasWaiters(lock, c, t1, t2);
1016		c.signalAll();
1017	<	lock.writeLock().unlock();
1018	<	t1.join(SHORT_DELAY_MS);
1019	<	t2.join(SHORT_DELAY_MS);
1020	<	assertFalse(t1.isAlive());
1021	<	assertFalse(t2.isAlive());
1017	>	assertHasNoWaiters(lock, c);
1018	>	writeLock.unlock();
1019	>	awaitTermination(t1);
1020	>	awaitTermination(t2);
1021	>	}
1022	>
1023	>	/**
1024	>	* signal wakes up waiting threads in FIFO order.
1025	>	*/
1026	>	public void testSignalWakesFifo() throws InterruptedException {
1027	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1028	>	final Condition c = lock.writeLock().newCondition();
1029	>	final CountDownLatch locked1 = new CountDownLatch(1);
1030	>	final CountDownLatch locked2 = new CountDownLatch(1);
1031	>	final Lock writeLock = lock.writeLock();
1032	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	writeLock.lock();
1035	>	locked1.countDown();
1036	>	c.await();
1037	>	writeLock.unlock();
1038	>	}});
1039	>
1040	>	locked1.await();
1041	>
1042	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1043	>	public void realRun() throws InterruptedException {
1044	>	writeLock.lock();
1045	>	locked2.countDown();
1046	>	c.await();
1047	>	writeLock.unlock();
1048	>	}});
1049	>
1050	>	locked2.await();
1051	>
1052	>	writeLock.lock();
1053	>	assertHasWaiters(lock, c, t1, t2);
1054	>	assertFalse(lock.hasQueuedThreads());
1055	>	c.signal();
1056	>	assertHasWaiters(lock, c, t2);
1057	>	assertTrue(lock.hasQueuedThread(t1));
1058	>	assertFalse(lock.hasQueuedThread(t2));
1059	>	c.signal();
1060	>	assertHasNoWaiters(lock, c);
1061	>	assertTrue(lock.hasQueuedThread(t1));
1062	>	assertTrue(lock.hasQueuedThread(t2));
1063	>	writeLock.unlock();
1064	>	awaitTermination(t1);
1065	>	awaitTermination(t2);
1066		}
1067
1068		/**
#	Line 1012 | Line 1094 | public class ReentrantReadWriteLockTest
1094		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1095		assertFalse(lock.hasQueuedThreads());
1096		lock.writeLock().lock();
1097	+	assertFalse(lock.hasQueuedThreads());
1098	+	long startTime = System.nanoTime();
1099		t1.start();
1100	<	Thread.sleep(SHORT_DELAY_MS);
1017	<	assertTrue(lock.hasQueuedThreads());
1100	>	waitForQueuedThread(lock, t1);
1101		t2.start();
1102	<	Thread.sleep(SHORT_DELAY_MS);
1102	>	waitForQueuedThread(lock, t2);
1103		assertTrue(lock.hasQueuedThreads());
1104		t1.interrupt();
1105	<	Thread.sleep(SHORT_DELAY_MS);
1105	>	awaitTermination(t1);
1106		assertTrue(lock.hasQueuedThreads());
1107		lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1108	>	awaitTermination(t2);
1109		assertFalse(lock.hasQueuedThreads());
1027	–	t1.join();
1028	–	t2.join();
1110		}
1111
1112		/**
#	Line 1043 | Line 1124 | public class ReentrantReadWriteLockTest
1124		* hasQueuedThread reports whether a thread is queued.
1125		*/
1126		public void testHasQueuedThread() throws InterruptedException {
1127	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1128	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1129	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1130	<	assertFalse(sync.hasQueuedThread(t1));
1131	<	assertFalse(sync.hasQueuedThread(t2));
1132	<	sync.writeLock().lock();
1127	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1128	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1129	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1130	>	assertFalse(lock.hasQueuedThread(t1));
1131	>	assertFalse(lock.hasQueuedThread(t2));
1132	>	lock.writeLock().lock();
1133	>	long startTime = System.nanoTime();
1134		t1.start();
1135	<	Thread.sleep(SHORT_DELAY_MS);
1136	<	assertTrue(sync.hasQueuedThread(t1));
1135	>	waitForQueuedThread(lock, t1);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138		t2.start();
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	assertTrue(sync.hasQueuedThread(t1));
1141	<	assertTrue(sync.hasQueuedThread(t2));
1139	>	waitForQueuedThread(lock, t2);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142		t1.interrupt();
1143	<	Thread.sleep(SHORT_DELAY_MS);
1144	<	assertFalse(sync.hasQueuedThread(t1));
1145	<	assertTrue(sync.hasQueuedThread(t2));
1146	<	sync.writeLock().unlock();
1147	<	Thread.sleep(SHORT_DELAY_MS);
1148	<	assertFalse(sync.hasQueuedThread(t1));
1149	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	assertFalse(sync.hasQueuedThread(t2));
1068	<	t1.join();
1069	<	t2.join();
1143	>	awaitTermination(t1);
1144	>	assertFalse(lock.hasQueuedThread(t1));
1145	>	assertTrue(lock.hasQueuedThread(t2));
1146	>	lock.writeLock().unlock();
1147	>	awaitTermination(t2);
1148	>	assertFalse(lock.hasQueuedThread(t1));
1149	>	assertFalse(lock.hasQueuedThread(t2));
1150		}
1151
1072	–
1152		/**
1153		* getQueueLength reports number of waiting threads
1154		*/
#	Line 1079 | Line 1158 | public class ReentrantReadWriteLockTest
1158		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1159		assertEquals(0, lock.getQueueLength());
1160		lock.writeLock().lock();
1161	+	long startTime = System.nanoTime();
1162		t1.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1163	>	waitForQueuedThread(lock, t1);
1164		assertEquals(1, lock.getQueueLength());
1165		t2.start();
1166	<	Thread.sleep(SHORT_DELAY_MS);
1166	>	waitForQueuedThread(lock, t2);
1167		assertEquals(2, lock.getQueueLength());
1168		t1.interrupt();
1169	<	Thread.sleep(SHORT_DELAY_MS);
1169	>	awaitTermination(t1);
1170		assertEquals(1, lock.getQueueLength());
1171		lock.writeLock().unlock();
1172	<	Thread.sleep(SHORT_DELAY_MS);
1172	>	awaitTermination(t2);
1173		assertEquals(0, lock.getQueueLength());
1094	–	t1.join();
1095	–	t2.join();
1174		}
1175
1176		/**
#	Line 1104 | Line 1182 | public class ReentrantReadWriteLockTest
1182		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1183		assertTrue(lock.getQueuedThreads().isEmpty());
1184		lock.writeLock().lock();
1185	+	long startTime = System.nanoTime();
1186		assertTrue(lock.getQueuedThreads().isEmpty());
1187		t1.start();
1188	<	Thread.sleep(SHORT_DELAY_MS);
1188	>	waitForQueuedThread(lock, t1);
1189	>	assertEquals(1, lock.getQueuedThreads().size());
1190		assertTrue(lock.getQueuedThreads().contains(t1));
1191		t2.start();
1192	<	Thread.sleep(SHORT_DELAY_MS);
1192	>	waitForQueuedThread(lock, t2);
1193	>	assertEquals(2, lock.getQueuedThreads().size());
1194		assertTrue(lock.getQueuedThreads().contains(t1));
1195		assertTrue(lock.getQueuedThreads().contains(t2));
1196		t1.interrupt();
1197	<	Thread.sleep(SHORT_DELAY_MS);
1197	>	awaitTermination(t1);
1198		assertFalse(lock.getQueuedThreads().contains(t1));
1199		assertTrue(lock.getQueuedThreads().contains(t2));
1200	+	assertEquals(1, lock.getQueuedThreads().size());
1201		lock.writeLock().unlock();
1202	<	Thread.sleep(SHORT_DELAY_MS);
1202	>	awaitTermination(t2);
1203		assertTrue(lock.getQueuedThreads().isEmpty());
1122	–	t1.join();
1123	–	t2.join();
1204		}
1205
1206		/**
#	Line 1145 | Line 1225 | public class ReentrantReadWriteLockTest
1225		} catch (NullPointerException success) {}
1226		}
1227
1148	–
1228		/**
1229		* getWaitingThreads throws NPE if null
1230		*/
#	Line 1182 | Line 1261 | public class ReentrantReadWriteLockTest
1261		} catch (IllegalMonitorStateException success) {}
1262		}
1263
1185	–
1264		/**
1265		* getWaitQueueLength throws IAE if not owned
1266		*/
#	Line 1208 | Line 1286 | public class ReentrantReadWriteLockTest
1286		} catch (IllegalMonitorStateException success) {}
1287		}
1288
1211	–
1289		/**
1290		* getWaitingThreads throws IAE if not owned
1291		*/
#	Line 1234 | Line 1311 | public class ReentrantReadWriteLockTest
1311		} catch (IllegalMonitorStateException success) {}
1312		}
1313
1237	–
1314		/**
1315		* hasWaiters returns true when a thread is waiting, else false
1316		*/
1317		public void testHasWaiters() throws InterruptedException {
1318	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1318	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1319		final Condition c = lock.writeLock().newCondition();
1320	<	Thread t = new Thread(new CheckedRunnable() {
1320	>	final CountDownLatch locked = new CountDownLatch(1);
1321	>	Thread t = newStartedThread(new CheckedRunnable() {
1322		public void realRun() throws InterruptedException {
1323		lock.writeLock().lock();
1324	<	threadAssertFalse(lock.hasWaiters(c));
1325	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1324	>	assertFalse(lock.hasWaiters(c));
1325	>	locked.countDown();
1326	>	assertEquals(0, lock.getWaitQueueLength(c));
1327		c.await();
1328		lock.writeLock().unlock();
1329		}});
1330
1331	<	t.start();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1331	>	locked.await();
1332		lock.writeLock().lock();
1333		assertTrue(lock.hasWaiters(c));
1334		assertEquals(1, lock.getWaitQueueLength(c));
1335		c.signal();
1336	+	assertHasNoWaiters(lock, c);
1337		lock.writeLock().unlock();
1338	<	Thread.sleep(SHORT_DELAY_MS);
1339	<	lock.writeLock().lock();
1262	<	assertFalse(lock.hasWaiters(c));
1263	<	assertEquals(0, lock.getWaitQueueLength(c));
1264	<	lock.writeLock().unlock();
1265	<	t.join(SHORT_DELAY_MS);
1266	<	assertFalse(t.isAlive());
1338	>	awaitTermination(t);
1339	>	assertHasNoWaiters(lock, c);
1340		}
1341
1342		/**
1343		* getWaitQueueLength returns number of waiting threads
1344		*/
1345		public void testGetWaitQueueLength() throws InterruptedException {
1346	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1346	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1347		final Condition c = lock.writeLock().newCondition();
1348	<	Thread t = new Thread(new CheckedRunnable() {
1348	>	final CountDownLatch locked = new CountDownLatch(1);
1349	>	Thread t = newStartedThread(new CheckedRunnable() {
1350		public void realRun() throws InterruptedException {
1351		lock.writeLock().lock();
1352	<	threadAssertFalse(lock.hasWaiters(c));
1353	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1352	>	assertEquals(0, lock.getWaitQueueLength(c));
1353	>	locked.countDown();
1354		c.await();
1355		lock.writeLock().unlock();
1356		}});
1357
1358	<	t.start();
1285	<	Thread.sleep(SHORT_DELAY_MS);
1358	>	locked.await();
1359		lock.writeLock().lock();
1360	<	assertTrue(lock.hasWaiters(c));
1360	>	assertHasWaiters(lock, c, t);
1361		assertEquals(1, lock.getWaitQueueLength(c));
1362		c.signal();
1363	<	lock.writeLock().unlock();
1291	<	Thread.sleep(SHORT_DELAY_MS);
1292	<	lock.writeLock().lock();
1293	<	assertFalse(lock.hasWaiters(c));
1363	>	assertHasNoWaiters(lock, c);
1364		assertEquals(0, lock.getWaitQueueLength(c));
1365		lock.writeLock().unlock();
1366	<	t.join(SHORT_DELAY_MS);
1297	<	assertFalse(t.isAlive());
1366	>	awaitTermination(t);
1367		}
1368
1300	–
1369		/**
1370		* getWaitingThreads returns only and all waiting threads
1371		*/
1372		public void testGetWaitingThreads() throws InterruptedException {
1373		final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1374		final Condition c = lock.writeLock().newCondition();
1375	+	final CountDownLatch locked1 = new CountDownLatch(1);
1376	+	final CountDownLatch locked2 = new CountDownLatch(1);
1377		Thread t1 = new Thread(new CheckedRunnable() {
1378		public void realRun() throws InterruptedException {
1379		lock.writeLock().lock();
1380	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1380	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1381	>	locked1.countDown();
1382		c.await();
1383		lock.writeLock().unlock();
1384		}});
#	Line 1315 | Line 1386 | public class ReentrantReadWriteLockTest
1386		Thread t2 = new Thread(new CheckedRunnable() {
1387		public void realRun() throws InterruptedException {
1388		lock.writeLock().lock();
1389	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1389	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1390	>	locked2.countDown();
1391		c.await();
1392		lock.writeLock().unlock();
1393		}});
#	Line 1323 | Line 1395 | public class ReentrantReadWriteLockTest
1395		lock.writeLock().lock();
1396		assertTrue(lock.getWaitingThreads(c).isEmpty());
1397		lock.writeLock().unlock();
1398	+
1399		t1.start();
1400	<	Thread.sleep(SHORT_DELAY_MS);
1400	>	locked1.await();
1401		t2.start();
1402	<	Thread.sleep(SHORT_DELAY_MS);
1402	>	locked2.await();
1403	>
1404		lock.writeLock().lock();
1405		assertTrue(lock.hasWaiters(c));
1406		assertTrue(lock.getWaitingThreads(c).contains(t1));
1407		assertTrue(lock.getWaitingThreads(c).contains(t2));
1408	+	assertEquals(2, lock.getWaitingThreads(c).size());
1409		c.signalAll();
1410	+	assertHasNoWaiters(lock, c);
1411		lock.writeLock().unlock();
1412	<	Thread.sleep(SHORT_DELAY_MS);
1413	<	lock.writeLock().lock();
1414	<	assertFalse(lock.hasWaiters(c));
1415	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1416	<	lock.writeLock().unlock();
1341	<	t1.join(SHORT_DELAY_MS);
1342	<	t2.join(SHORT_DELAY_MS);
1343	<	assertFalse(t1.isAlive());
1344	<	assertFalse(t2.isAlive());
1412	>
1413	>	awaitTermination(t1);
1414	>	awaitTermination(t2);
1415	>
1416	>	assertHasNoWaiters(lock, c);
1417		}
1418
1419		/**

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