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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 UTC vs.
Revision 1.83 by jsr166, Sun Sep 22 01:59:57 2019 UTC

#	Line 6 | Line 6
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.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
14	–	import java.io.*;
15	–	import java.util.*;
10
11	+	import java.util.Arrays;
12	+	import java.util.Collection;
13	+	import java.util.HashSet;
14	+	import java.util.concurrent.Callable;
15	+	import java.util.concurrent.CountDownLatch;
16	+	import java.util.concurrent.atomic.AtomicBoolean;
17	+	import java.util.concurrent.locks.Condition;
18	+	import java.util.concurrent.locks.Lock;
19	+	import java.util.concurrent.locks.ReentrantReadWriteLock;
20	+
21	+	import junit.framework.Test;
22	+	import junit.framework.TestSuite;
23	+
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class ReentrantReadWriteLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run(suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 67 | Line 75 | public class ReentrantReadWriteLockTest
75		*/
76		void releaseWriteLock(PublicReentrantReadWriteLock lock) {
77		ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
78	<	assertWriteLockedBy(lock, Thread.currentThread());
78	>	assertWriteLockedByMoi(lock);
79		assertEquals(1, lock.getWriteHoldCount());
80		writeLock.unlock();
81		assertNotWriteLocked(lock);
#	Line 84 | Line 92 | public class ReentrantReadWriteLockTest
92		Thread.yield();
93		}
94		assertTrue(t.isAlive());
95	<	assertTrue(lock.getOwner() != t);
95	>	assertNotSame(t, lock.getOwner());
96		}
97
98		/**
#	Line 94 | Line 102 | public class ReentrantReadWriteLockTest
102		assertFalse(lock.isWriteLocked());
103		assertFalse(lock.isWriteLockedByCurrentThread());
104		assertFalse(lock.writeLock().isHeldByCurrentThread());
97	–	assertNull(lock.getOwner());
105		assertEquals(0, lock.getWriteHoldCount());
106	+	assertEquals(0, lock.writeLock().getHoldCount());
107	+	assertNull(lock.getOwner());
108		}
109
110		/**
#	Line 110 | Line 119 | public class ReentrantReadWriteLockTest
119		lock.writeLock().isHeldByCurrentThread());
120		assertEquals(t == Thread.currentThread(),
121		lock.getWriteHoldCount() > 0);
122	+	assertEquals(t == Thread.currentThread(),
123	+	lock.writeLock().getHoldCount() > 0);
124		assertEquals(0, lock.getReadLockCount());
125		}
126
127		/**
128	+	* Checks that lock is write-locked by the current thread.
129	+	*/
130	+	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
131	+	assertWriteLockedBy(lock, Thread.currentThread());
132	+	}
133	+
134	+	/**
135		* Checks that condition c has no waiters.
136		*/
137		void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
#	Line 135 | Line 153 | public class ReentrantReadWriteLockTest
153		lock.writeLock().unlock();
154		}
155
156	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
157	+
158	+	/**
159	+	* Awaits condition "indefinitely" using the specified AwaitMethod.
160	+	*/
161	+	void await(Condition c, AwaitMethod awaitMethod)
162	+	throws InterruptedException {
163	+	long timeoutMillis = 2 * LONG_DELAY_MS;
164	+	switch (awaitMethod) {
165	+	case await:
166	+	c.await();
167	+	break;
168	+	case awaitTimed:
169	+	assertTrue(c.await(timeoutMillis, MILLISECONDS));
170	+	break;
171	+	case awaitNanos:
172	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
173	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
174	+	assertTrue(nanosRemaining > timeoutNanos / 2);
175	+	assertTrue(nanosRemaining <= timeoutNanos);
176	+	break;
177	+	case awaitUntil:
178	+	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
179	+	break;
180	+	default:
181	+	throw new AssertionError();
182	+	}
183	+	}
184	+
185		/**
186		* Constructor sets given fairness, and is in unlocked state
187		*/
#	Line 160 | Line 207 | public class ReentrantReadWriteLockTest
207		/**
208		* write-locking and read-locking an unlocked lock succeed
209		*/
210	<	public void testLock() {
211	<	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
212	<	assertNotWriteLocked(lock);
213	<	lock.writeLock().lock();
214	<	assertWriteLockedBy(lock, Thread.currentThread());
168	<	lock.writeLock().unlock();
169	<	assertNotWriteLocked(lock);
170	<	assertEquals(0, lock.getReadLockCount());
171	<	lock.readLock().lock();
172	<	assertNotWriteLocked(lock);
173	<	assertEquals(1, lock.getReadLockCount());
174	<	lock.readLock().unlock();
175	<	assertNotWriteLocked(lock);
176	<	assertEquals(0, lock.getReadLockCount());
177	<	}
178	<
179	<	/**
180	<	* locking an unlocked fair lock succeeds
181	<	*/
182	<	public void testFairLock() {
183	<	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
210	>	public void testLock()      { testLock(false); }
211	>	public void testLock_fair() { testLock(true); }
212	>	public void testLock(boolean fair) {
213	>	PublicReentrantReadWriteLock lock =
214	>	new PublicReentrantReadWriteLock(fair);
215		assertNotWriteLocked(lock);
216		lock.writeLock().lock();
217	<	assertWriteLockedBy(lock, Thread.currentThread());
217	>	assertWriteLockedByMoi(lock);
218		lock.writeLock().unlock();
219		assertNotWriteLocked(lock);
220		assertEquals(0, lock.getReadLockCount());
#	Line 198 | Line 229 | public class ReentrantReadWriteLockTest
229		/**
230		* getWriteHoldCount returns number of recursive holds
231		*/
232	<	public void testGetWriteHoldCount() {
233	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
233	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
234	>	public void testGetWriteHoldCount(boolean fair) {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
236		for (int i = 1; i <= SIZE; i++) {
237		lock.writeLock().lock();
238		assertEquals(i,lock.getWriteHoldCount());
239		}
240		for (int i = SIZE; i > 0; i--) {
241		lock.writeLock().unlock();
242	<	assertEquals(i-1,lock.getWriteHoldCount());
242	>	assertEquals(i - 1,lock.getWriteHoldCount());
243		}
244		}
245
246		/**
247	<	* WriteLock.getHoldCount returns number of recursive holds
247	>	* writelock.getHoldCount returns number of recursive holds
248		*/
249	<	public void testGetHoldCount() {
250	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	>	public void testGetHoldCount()      { testGetHoldCount(false); }
250	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
251	>	public void testGetHoldCount(boolean fair) {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
253		for (int i = 1; i <= SIZE; i++) {
254		lock.writeLock().lock();
255		assertEquals(i,lock.writeLock().getHoldCount());
256		}
257		for (int i = SIZE; i > 0; i--) {
258		lock.writeLock().unlock();
259	<	assertEquals(i-1,lock.writeLock().getHoldCount());
259	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
260		}
261		}
262
263		/**
264		* getReadHoldCount returns number of recursive holds
265		*/
266	<	public void testGetReadHoldCount() {
267	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
267	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
268	>	public void testGetReadHoldCount(boolean fair) {
269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
270		for (int i = 1; i <= SIZE; i++) {
271		lock.readLock().lock();
272		assertEquals(i,lock.getReadHoldCount());
273		}
274		for (int i = SIZE; i > 0; i--) {
275		lock.readLock().unlock();
276	<	assertEquals(i-1,lock.getReadHoldCount());
276	>	assertEquals(i - 1,lock.getReadHoldCount());
277		}
278		}
279
280		/**
281		* write-unlocking an unlocked lock throws IllegalMonitorStateException
282		*/
283	<	public void testWriteUnlock_IllegalMonitorStateException() {
284	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
283	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
284	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
285	>	public void testWriteUnlock_IMSE(boolean fair) {
286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
287		try {
288		lock.writeLock().unlock();
289		shouldThrow();
#	Line 254 | Line 293 | public class ReentrantReadWriteLockTest
293		/**
294		* read-unlocking an unlocked lock throws IllegalMonitorStateException
295		*/
296	<	public void testReadUnlock_IllegalMonitorStateException() {
297	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
296	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
297	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
298	>	public void testReadUnlock_IMSE(boolean fair) {
299	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
300		try {
301		lock.readLock().unlock();
302		shouldThrow();
#	Line 265 | Line 306 | public class ReentrantReadWriteLockTest
306		/**
307		* write-lockInterruptibly is interruptible
308		*/
309	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
310	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
309	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
310	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
311	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
312	>	final PublicReentrantReadWriteLock lock =
313	>	new PublicReentrantReadWriteLock(fair);
314		lock.writeLock().lock();
315		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
316		public void realRun() throws InterruptedException {
#	Line 282 | Line 326 | public class ReentrantReadWriteLockTest
326		/**
327		* timed write-tryLock is interruptible
328		*/
329	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
330	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
329	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
330	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
331	>	public void testWriteTryLock_Interruptible(boolean fair) {
332	>	final PublicReentrantReadWriteLock lock =
333	>	new PublicReentrantReadWriteLock(fair);
334		lock.writeLock().lock();
335		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
336		public void realRun() throws InterruptedException {
337	<	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
337	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
338		}});
339
340		waitForQueuedThread(lock, t);
#	Line 299 | Line 346 | public class ReentrantReadWriteLockTest
346		/**
347		* read-lockInterruptibly is interruptible
348		*/
349	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
350	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
349	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
350	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
351	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
352	>	final PublicReentrantReadWriteLock lock =
353	>	new PublicReentrantReadWriteLock(fair);
354		lock.writeLock().lock();
355		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
356		public void realRun() throws InterruptedException {
#	Line 316 | Line 366 | public class ReentrantReadWriteLockTest
366		/**
367		* timed read-tryLock is interruptible
368		*/
369	<	public void testReadTryLock_Interrupted() throws InterruptedException {
370	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
369	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
370	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
371	>	public void testReadTryLock_Interruptible(boolean fair) {
372	>	final PublicReentrantReadWriteLock lock =
373	>	new PublicReentrantReadWriteLock(fair);
374		lock.writeLock().lock();
375		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
376		public void realRun() throws InterruptedException {
377	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
377	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
378		}});
379
380		waitForQueuedThread(lock, t);
#	Line 331 | Line 384 | public class ReentrantReadWriteLockTest
384		}
385
386		/**
387	+	* write-tryLock on an unlocked lock succeeds
388	+	*/
389	+	public void testWriteTryLock()      { testWriteTryLock(false); }
390	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
391	+	public void testWriteTryLock(boolean fair) {
392	+	final PublicReentrantReadWriteLock lock =
393	+	new PublicReentrantReadWriteLock(fair);
394	+	assertTrue(lock.writeLock().tryLock());
395	+	assertWriteLockedByMoi(lock);
396	+	assertTrue(lock.writeLock().tryLock());
397	+	assertWriteLockedByMoi(lock);
398	+	lock.writeLock().unlock();
399	+	releaseWriteLock(lock);
400	+	}
401	+
402	+	/**
403		* write-tryLock fails if locked
404		*/
405	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
406	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
405	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
406	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
407	>	public void testWriteTryLockWhenLocked(boolean fair) {
408	>	final PublicReentrantReadWriteLock lock =
409	>	new PublicReentrantReadWriteLock(fair);
410		lock.writeLock().lock();
411		Thread t = newStartedThread(new CheckedRunnable() {
412		public void realRun() {
#	Line 348 | Line 420 | public class ReentrantReadWriteLockTest
420		/**
421		* read-tryLock fails if locked
422		*/
423	<	public void testReadTryLockWhenLocked() throws InterruptedException {
424	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
423	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
424	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
425	>	public void testReadTryLockWhenLocked(boolean fair) {
426	>	final PublicReentrantReadWriteLock lock =
427	>	new PublicReentrantReadWriteLock(fair);
428		lock.writeLock().lock();
429		Thread t = newStartedThread(new CheckedRunnable() {
430		public void realRun() {
#	Line 363 | Line 438 | public class ReentrantReadWriteLockTest
438		/**
439		* Multiple threads can hold a read lock when not write-locked
440		*/
441	<	public void testMultipleReadLocks() throws InterruptedException {
442	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
441	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
442	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
443	>	public void testMultipleReadLocks(boolean fair) {
444	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
445		lock.readLock().lock();
446		Thread t = newStartedThread(new CheckedRunnable() {
447	<	public void realRun() {
447	>	public void realRun() throws InterruptedException {
448		assertTrue(lock.readLock().tryLock());
449		lock.readLock().unlock();
450	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
451	+	lock.readLock().unlock();
452	+	lock.readLock().lock();
453	+	lock.readLock().unlock();
454		}});
455
456		awaitTermination(t);
#	Line 379 | Line 460 | public class ReentrantReadWriteLockTest
460		/**
461		* A writelock succeeds only after a reading thread unlocks
462		*/
463	<	public void testWriteAfterReadLock() throws InterruptedException {
464	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
463	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
464	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
465	>	public void testWriteAfterReadLock(boolean fair) {
466	>	final PublicReentrantReadWriteLock lock =
467	>	new PublicReentrantReadWriteLock(fair);
468		lock.readLock().lock();
385	–
469		Thread t = newStartedThread(new CheckedRunnable() {
470		public void realRun() {
471		assertEquals(1, lock.getReadLockCount());
#	Line 402 | Line 485 | public class ReentrantReadWriteLockTest
485		/**
486		* A writelock succeeds only after reading threads unlock
487		*/
488	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
489	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
488	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
489	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
490	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
491	>	final PublicReentrantReadWriteLock lock =
492	>	new PublicReentrantReadWriteLock(fair);
493		lock.readLock().lock();
494		lock.readLock().lock();
495		Thread t1 = newStartedThread(new CheckedRunnable() {
#	Line 433 | Line 519 | public class ReentrantReadWriteLockTest
519
520		/**
521		* A thread that tries to acquire a fair read lock (non-reentrantly)
522	<	* will block if there is a waiting writer thread.
522	>	* will block if there is a waiting writer thread
523		*/
524	<	public void testReaderWriterReaderFairFifo() throws InterruptedException {
525	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
524	>	public void testReaderWriterReaderFairFifo() {
525	>	final PublicReentrantReadWriteLock lock =
526	>	new PublicReentrantReadWriteLock(true);
527		final AtomicBoolean t1GotLock = new AtomicBoolean(false);
528
529		lock.readLock().lock();
#	Line 471 | Line 558 | public class ReentrantReadWriteLockTest
558		/**
559		* Readlocks succeed only after a writing thread unlocks
560		*/
561	<	public void testReadAfterWriteLock() throws InterruptedException {
562	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
561	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
562	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
563	>	public void testReadAfterWriteLock(boolean fair) {
564	>	final PublicReentrantReadWriteLock lock =
565	>	new PublicReentrantReadWriteLock(fair);
566		lock.writeLock().lock();
567		Thread t1 = newStartedThread(new CheckedRunnable() {
568		public void realRun() {
#	Line 495 | Line 585 | public class ReentrantReadWriteLockTest
585		/**
586		* Read trylock succeeds if write locked by current thread
587		*/
588	<	public void testReadHoldingWriteLock() {
589	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
589	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
590	>	public void testReadHoldingWriteLock(boolean fair) {
591	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
592		lock.writeLock().lock();
593		assertTrue(lock.readLock().tryLock());
594		lock.readLock().unlock();
#	Line 504 | Line 596 | public class ReentrantReadWriteLockTest
596		}
597
598		/**
599	<	* Read lock succeeds if write locked by current thread even if
600	<	* other threads are waiting for readlock
599	>	* Read trylock succeeds (barging) even in the presence of waiting
600	>	* readers and/or writers
601		*/
602	<	public void testReadHoldingWriteLock2() throws InterruptedException {
603	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
604	<	lock.writeLock().lock();
602	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
603	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
604	>	public void testReadTryLockBarging(boolean fair) {
605	>	final PublicReentrantReadWriteLock lock =
606	>	new PublicReentrantReadWriteLock(fair);
607		lock.readLock().lock();
514	–	lock.readLock().unlock();
608
609		Thread t1 = newStartedThread(new CheckedRunnable() {
610		public void realRun() {
611	<	lock.readLock().lock();
612	<	lock.readLock().unlock();
520	<	}});
521	<	Thread t2 = newStartedThread(new CheckedRunnable() {
522	<	public void realRun() {
523	<	lock.readLock().lock();
524	<	lock.readLock().unlock();
611	>	lock.writeLock().lock();
612	>	lock.writeLock().unlock();
613		}});
614
615		waitForQueuedThread(lock, t1);
528	–	waitForQueuedThread(lock, t2);
529	–	assertWriteLockedBy(lock, Thread.currentThread());
530	–	lock.readLock().lock();
531	–	lock.readLock().unlock();
532	–	releaseWriteLock(lock);
533	–	awaitTermination(t1);
534	–	awaitTermination(t2);
535	–	}
616
537	–	/**
538	–	* Read lock succeeds if write locked by current thread even if
539	–	* other threads are waiting for writelock
540	–	*/
541	–	public void testReadHoldingWriteLock3() throws InterruptedException {
542	–	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543	–	lock.writeLock().lock();
544	–	lock.readLock().lock();
545	–	lock.readLock().unlock();
546	–
547	–	Thread t1 = newStartedThread(new CheckedRunnable() {
548	–	public void realRun() {
549	–	lock.writeLock().lock();
550	–	lock.writeLock().unlock();
551	–	}});
617		Thread t2 = newStartedThread(new CheckedRunnable() {
618		public void realRun() {
619	<	lock.writeLock().lock();
620	<	lock.writeLock().unlock();
619	>	lock.readLock().lock();
620	>	lock.readLock().unlock();
621		}});
622
623	<	waitForQueuedThread(lock, t1);
624	<	waitForQueuedThread(lock, t2);
560	<	assertWriteLockedBy(lock, Thread.currentThread());
561	<	lock.readLock().lock();
562	<	lock.readLock().unlock();
563	<	releaseWriteLock(lock);
564	<	awaitTermination(t1);
565	<	awaitTermination(t2);
566	<	}
567	<
568	<	/**
569	<	* Write lock succeeds if write locked by current thread even if
570	<	* other threads are waiting for writelock
571	<	*/
572	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
573	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574	<	lock.writeLock().lock();
575	<	lock.writeLock().lock();
576	<	lock.writeLock().unlock();
623	>	if (fair)
624	>	waitForQueuedThread(lock, t2);
625
626	<	Thread t1 = newStartedThread(new CheckedRunnable() {
626	>	Thread t3 = newStartedThread(new CheckedRunnable() {
627		public void realRun() {
628	<	lock.writeLock().lock();
629	<	lock.writeLock().unlock();
582	<	}});
583	<	Thread t2 = newStartedThread(new CheckedRunnable() {
584	<	public void realRun() {
585	<	lock.writeLock().lock();
586	<	lock.writeLock().unlock();
628	>	lock.readLock().tryLock();
629	>	lock.readLock().unlock();
630		}});
631
632	<	waitForQueuedThread(lock, t1);
633	<	waitForQueuedThread(lock, t2);
634	<	assertWriteLockedBy(lock, Thread.currentThread());
635	<	assertEquals(1, lock.getWriteHoldCount());
636	<	lock.writeLock().lock();
594	<	assertWriteLockedBy(lock, Thread.currentThread());
595	<	assertEquals(2, lock.getWriteHoldCount());
596	<	lock.writeLock().unlock();
597	<	releaseWriteLock(lock);
632	>	assertTrue(lock.getReadLockCount() > 0);
633	>	awaitTermination(t3);
634	>	assertTrue(t1.isAlive());
635	>	if (fair) assertTrue(t2.isAlive());
636	>	lock.readLock().unlock();
637		awaitTermination(t1);
638		awaitTermination(t2);
639		}
640
641		/**
642	<	* Fair Read trylock succeeds if write locked by current thread
604	<	*/
605	<	public void testReadHoldingWriteLockFair() {
606	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	<	lock.writeLock().lock();
608	<	assertTrue(lock.readLock().tryLock());
609	<	lock.readLock().unlock();
610	<	lock.writeLock().unlock();
611	<	}
612	<
613	<	/**
614	<	* Fair Read lock succeeds if write locked by current thread even if
642	>	* Read lock succeeds if write locked by current thread even if
643		* other threads are waiting for readlock
644		*/
645	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
646	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
645	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
646	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
647	>	public void testReadHoldingWriteLock2(boolean fair) {
648	>	final PublicReentrantReadWriteLock lock =
649	>	new PublicReentrantReadWriteLock(fair);
650		lock.writeLock().lock();
651		lock.readLock().lock();
652		lock.readLock().unlock();
#	Line 633 | Line 664 | public class ReentrantReadWriteLockTest
664
665		waitForQueuedThread(lock, t1);
666		waitForQueuedThread(lock, t2);
667	<	assertWriteLockedBy(lock, Thread.currentThread());
667	>	assertWriteLockedByMoi(lock);
668		lock.readLock().lock();
669		lock.readLock().unlock();
670		releaseWriteLock(lock);
#	Line 642 | Line 673 | public class ReentrantReadWriteLockTest
673		}
674
675		/**
676	<	* Fair Read lock succeeds if write locked by current thread even if
676	>	* Read lock succeeds if write locked by current thread even if
677		* other threads are waiting for writelock
678		*/
679	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
680	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
679	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
680	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
681	>	public void testReadHoldingWriteLock3(boolean fair) {
682	>	final PublicReentrantReadWriteLock lock =
683	>	new PublicReentrantReadWriteLock(fair);
684		lock.writeLock().lock();
685		lock.readLock().lock();
686		lock.readLock().unlock();
#	Line 664 | Line 698 | public class ReentrantReadWriteLockTest
698
699		waitForQueuedThread(lock, t1);
700		waitForQueuedThread(lock, t2);
701	<	assertWriteLockedBy(lock, Thread.currentThread());
701	>	assertWriteLockedByMoi(lock);
702		lock.readLock().lock();
703		lock.readLock().unlock();
704	<	releaseWriteLock(lock);
704	>	assertWriteLockedByMoi(lock);
705	>	lock.writeLock().unlock();
706		awaitTermination(t1);
707		awaitTermination(t2);
708		}
709
710		/**
711	<	* Fair Write lock succeeds if write locked by current thread even if
711	>	* Write lock succeeds if write locked by current thread even if
712		* other threads are waiting for writelock
713		*/
714	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
715	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
714	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
715	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
716	>	public void testWriteHoldingWriteLock4(boolean fair) {
717	>	final PublicReentrantReadWriteLock lock =
718	>	new PublicReentrantReadWriteLock(fair);
719	>	lock.writeLock().lock();
720		lock.writeLock().lock();
721	+	lock.writeLock().unlock();
722	+
723		Thread t1 = newStartedThread(new CheckedRunnable() {
724		public void realRun() {
725		lock.writeLock().lock();
#	Line 692 | Line 733 | public class ReentrantReadWriteLockTest
733
734		waitForQueuedThread(lock, t1);
735		waitForQueuedThread(lock, t2);
736	<	assertWriteLockedBy(lock, Thread.currentThread());
736	>	assertWriteLockedByMoi(lock);
737		assertEquals(1, lock.getWriteHoldCount());
738		lock.writeLock().lock();
739	+	assertWriteLockedByMoi(lock);
740		assertEquals(2, lock.getWriteHoldCount());
741		lock.writeLock().unlock();
742	<	lock.writeLock().lock();
742	>	assertWriteLockedByMoi(lock);
743	>	assertEquals(1, lock.getWriteHoldCount());
744		lock.writeLock().unlock();
702	–	releaseWriteLock(lock);
745		awaitTermination(t1);
746		awaitTermination(t2);
747		}
#	Line 707 | Line 749 | public class ReentrantReadWriteLockTest
749		/**
750		* Read tryLock succeeds if readlocked but not writelocked
751		*/
752	<	public void testTryLockWhenReadLocked() throws InterruptedException {
753	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
752	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
753	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
754	>	public void testTryLockWhenReadLocked(boolean fair) {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
756		lock.readLock().lock();
757		Thread t = newStartedThread(new CheckedRunnable() {
758		public void realRun() {
#	Line 723 | Line 767 | public class ReentrantReadWriteLockTest
767		/**
768		* write tryLock fails when readlocked
769		*/
770	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772	<	lock.readLock().lock();
773	<	Thread t = newStartedThread(new CheckedRunnable() {
730	<	public void realRun() {
731	<	assertFalse(lock.writeLock().tryLock());
732	<	}});
733	<
734	<	awaitTermination(t);
735	<	lock.readLock().unlock();
736	<	}
737	<
738	<	/**
739	<	* Fair Read tryLock succeeds if readlocked but not writelocked
740	<	*/
741	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	<	lock.readLock().lock();
744	<	Thread t = newStartedThread(new CheckedRunnable() {
745	<	public void realRun() {
746	<	assertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}});
749	<
750	<	awaitTermination(t);
751	<	lock.readLock().unlock();
752	<	}
753	<
754	<	/**
755	<	* Fair write tryLock fails when readlocked
756	<	*/
757	<	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
770	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
771	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
772	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
774		lock.readLock().lock();
775		Thread t = newStartedThread(new CheckedRunnable() {
776		public void realRun() {
#	Line 769 | Line 784 | public class ReentrantReadWriteLockTest
784		/**
785		* write timed tryLock times out if locked
786		*/
787	<	public void testWriteTryLock_Timeout() throws InterruptedException {
788	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
787	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
788	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
789	>	public void testWriteTryLock_Timeout(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792	>	final long timeoutMillis = timeoutMillis();
793		lock.writeLock().lock();
794		Thread t = newStartedThread(new CheckedRunnable() {
795		public void realRun() throws InterruptedException {
796	<	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
796	>	long startTime = System.nanoTime();
797	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
798	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
799		}});
800
801		awaitTermination(t);
802	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
782	<	lock.writeLock().unlock();
802	>	releaseWriteLock(lock);
803		}
804
805		/**
806		* read timed tryLock times out if write-locked
807		*/
808	<	public void testReadTryLock_Timeout() throws InterruptedException {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
808	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
809	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
810	>	public void testReadTryLock_Timeout(boolean fair) {
811	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
812		lock.writeLock().lock();
813		Thread t = newStartedThread(new CheckedRunnable() {
814		public void realRun() throws InterruptedException {
815	<	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
815	>	long startTime = System.nanoTime();
816	>	long timeoutMillis = timeoutMillis();
817	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
818	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
819		}});
820
821		awaitTermination(t);
#	Line 799 | Line 824 | public class ReentrantReadWriteLockTest
824		}
825
826		/**
827	<	* write lockInterruptibly succeeds if lock free else is interruptible
827	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
828		*/
829	<	public void testWriteLockInterruptibly() throws InterruptedException {
830	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
831	<	lock.writeLock().lockInterruptibly();
829	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
830	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
831	>	public void testWriteLockInterruptibly(boolean fair) {
832	>	final PublicReentrantReadWriteLock lock =
833	>	new PublicReentrantReadWriteLock(fair);
834	>	try {
835	>	lock.writeLock().lockInterruptibly();
836	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
837		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
838		public void realRun() throws InterruptedException {
839		lock.writeLock().lockInterruptibly();
#	Line 811 | Line 841 | public class ReentrantReadWriteLockTest
841
842		waitForQueuedThread(lock, t);
843		t.interrupt();
844	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
845		awaitTermination(t);
846		releaseWriteLock(lock);
847		}
#	Line 818 | Line 849 | public class ReentrantReadWriteLockTest
849		/**
850		* read lockInterruptibly succeeds if lock free else is interruptible
851		*/
852	<	public void testReadLockInterruptibly() throws InterruptedException {
853	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
854	<	lock.writeLock().lockInterruptibly();
852	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
853	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
854	>	public void testReadLockInterruptibly(boolean fair) {
855	>	final PublicReentrantReadWriteLock lock =
856	>	new PublicReentrantReadWriteLock(fair);
857	>	try {
858	>	lock.readLock().lockInterruptibly();
859	>	lock.readLock().unlock();
860	>	lock.writeLock().lockInterruptibly();
861	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
862		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
863		public void realRun() throws InterruptedException {
864		lock.readLock().lockInterruptibly();
#	Line 835 | Line 873 | public class ReentrantReadWriteLockTest
873		/**
874		* Calling await without holding lock throws IllegalMonitorStateException
875		*/
876	<	public void testAwait_IllegalMonitor() throws InterruptedException {
877	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
878	<	final Condition c = lock.writeLock().newCondition();
879	<	try {
880	<	c.await();
881	<	shouldThrow();
882	<	} catch (IllegalMonitorStateException success) {}
883	<	try {
884	<	c.await(LONG_DELAY_MS, MILLISECONDS);
885	<	shouldThrow();
886	<	} catch (IllegalMonitorStateException success) {}
887	<	try {
888	<	c.awaitNanos(100);
889	<	shouldThrow();
890	<	} catch (IllegalMonitorStateException success) {}
891	<	try {
854	<	c.awaitUninterruptibly();
855	<	shouldThrow();
856	<	} catch (IllegalMonitorStateException success) {}
876	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
877	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
878	>	public void testAwait_IMSE(boolean fair) {
879	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
880	>	final Condition c = lock.writeLock().newCondition();
881	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
882	>	long startTime = System.nanoTime();
883	>	try {
884	>	await(c, awaitMethod);
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {
887	>	} catch (InterruptedException fail) {
888	>	threadUnexpectedException(fail);
889	>	}
890	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
891	>	}
892		}
893
894		/**
895		* Calling signal without holding lock throws IllegalMonitorStateException
896		*/
897	<	public void testSignal_IllegalMonitor() {
898	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
897	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
898	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
899	>	public void testSignal_IMSE(boolean fair) {
900	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
901		final Condition c = lock.writeLock().newCondition();
902		try {
903		c.signal();
#	Line 871 | Line 908 | public class ReentrantReadWriteLockTest
908		/**
909		* Calling signalAll without holding lock throws IllegalMonitorStateException
910		*/
911	<	public void testSignalAll_IllegalMonitor() {
912	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
911	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
912	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
913	>	public void testSignalAll_IMSE(boolean fair) {
914	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
915		final Condition c = lock.writeLock().newCondition();
916		try {
917		c.signalAll();
#	Line 883 | Line 922 | public class ReentrantReadWriteLockTest
922		/**
923		* awaitNanos without a signal times out
924		*/
925	<	public void testAwaitNanos_Timeout() throws InterruptedException {
926	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
925	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
926	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
927	>	public void testAwaitNanos_Timeout(boolean fair) {
928	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
929		final Condition c = lock.writeLock().newCondition();
930	+	final long timeoutMillis = timeoutMillis();
931		lock.writeLock().lock();
932	<	long startTime = System.nanoTime();
933	<	long timeoutMillis = 10;
934	<	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
935	<	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	<	assertTrue(nanosRemaining <= 0);
932	>	final long startTime = System.nanoTime();
933	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
934	>	try {
935	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	>	assertTrue(nanosRemaining <= 0);
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
939		lock.writeLock().unlock();
940		}
#	Line 899 | Line 942 | public class ReentrantReadWriteLockTest
942		/**
943		* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() throws InterruptedException {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
945	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
946	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
947	>	public void testAwait_Timeout(boolean fair) {
948	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
949		final Condition c = lock.writeLock().newCondition();
950	+	final long timeoutMillis = timeoutMillis();
951		lock.writeLock().lock();
952	<	long startTime = System.nanoTime();
953	<	long timeoutMillis = 10;
954	<	assertFalse(c.await(timeoutMillis, MILLISECONDS));
952	>	final long startTime = System.nanoTime();
953	>	try {
954	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
955	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
956		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957		lock.writeLock().unlock();
958		}
#	Line 913 | Line 960 | public class ReentrantReadWriteLockTest
960		/**
961		* awaitUntil without a signal times out
962		*/
963	<	public void testAwaitUntil_Timeout() throws InterruptedException {
964	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
963	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
964	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
965	>	public void testAwaitUntil_Timeout(boolean fair) {
966	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
967		final Condition c = lock.writeLock().newCondition();
968		lock.writeLock().lock();
969	<	java.util.Date d = new java.util.Date();
970	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
969	>	// We shouldn't assume that nanoTime and currentTimeMillis
970	>	// use the same time source, so don't use nanoTime here.
971	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
972	>	try {
973	>	assertFalse(c.awaitUntil(delayedDate));
974	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
975	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
976		lock.writeLock().unlock();
977		}
978
979		/**
980		* await returns when signalled
981		*/
982	<	public void testAwait() throws InterruptedException {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
982	>	public void testAwait()      { testAwait(false); }
983	>	public void testAwait_fair() { testAwait(true); }
984	>	public void testAwait(boolean fair) {
985	>	final PublicReentrantReadWriteLock lock =
986	>	new PublicReentrantReadWriteLock(fair);
987		final Condition c = lock.writeLock().newCondition();
988		final CountDownLatch locked = new CountDownLatch(1);
989		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 937 | Line 994 | public class ReentrantReadWriteLockTest
994		lock.writeLock().unlock();
995		}});
996
997	<	locked.await();
997	>	await(locked);
998		lock.writeLock().lock();
999	+	assertHasWaiters(lock, c, t);
1000		c.signal();
1001	+	assertHasNoWaiters(lock, c);
1002		assertTrue(t.isAlive());
1003		lock.writeLock().unlock();
1004		awaitTermination(t);
1005		}
1006
1007		/**
1008	<	* awaitUninterruptibly doesn't abort on interrupt
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010	<	public void testAwaitUninterruptibly() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1012	<	final Condition c = lock.writeLock().newCondition();
1013	<	final CountDownLatch locked = new CountDownLatch(1);
1014	<	final AtomicBoolean canAwake = new AtomicBoolean(false);
1015	<	Thread t = newStartedThread(new CheckedRunnable() {
1010	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1014	>	final Condition condition = lock.newCondition();
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016	>
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018		public void realRun() {
1019	<	lock.writeLock().lock();
1020	<	locked.countDown();
1021	<	c.awaitUninterruptibly();
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	condition.awaitUninterruptibly();
1024		assertTrue(Thread.interrupted());
1025	<	lock.writeLock().unlock();
1025	>	lock.unlock();
1026		}});
1027
1028	<	locked.await();
1029	<	lock.writeLock().lock();
1030	<	lock.writeLock().unlock();
1031	<	t.interrupt();
1032	<	t.join(10);
1033	<	assertTrue(t.isAlive());
1034	<	lock.writeLock().lock();
1035	<	c.signal();
973	<	lock.writeLock().unlock();
974	<	awaitTermination(t);
975	<	}
976	<
977	<	/**
978	<	* await is interruptible
979	<	*/
980	<	public void testAwait_Interrupt() throws InterruptedException {
981	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
982	<	final Condition c = lock.writeLock().newCondition();
983	<	final CountDownLatch locked = new CountDownLatch(1);
984	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
985	<	public void realRun() throws InterruptedException {
986	<	lock.writeLock().lock();
987	<	assertWriteLockedBy(lock, Thread.currentThread());
988	<	assertHasNoWaiters(lock, c);
989	<	locked.countDown();
990	<	try {
991	<	c.await();
992	<	} finally {
993	<	assertWriteLockedBy(lock, Thread.currentThread());
994	<	assertHasNoWaiters(lock, c);
995	<	lock.writeLock().unlock();
996	<	assertFalse(Thread.interrupted());
997	<	}
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.lock();
1032	>	pleaseInterrupt.countDown();
1033	>	condition.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.unlock();
1036		}});
1037
1038	<	locked.await();
1039	<	assertHasWaiters(lock, c, t);
1040	<	t.interrupt();
1041	<	awaitTermination(t);
1042	<	assertNotWriteLocked(lock);
1043	<	}
1038	>	await(pleaseInterrupt);
1039	>	t2.interrupt();
1040	>	lock.lock();
1041	>	lock.unlock();
1042	>	assertThreadBlocks(t1, Thread.State.WAITING);
1043	>	assertThreadBlocks(t2, Thread.State.WAITING);
1044	>
1045	>	lock.lock();
1046	>	condition.signalAll();
1047	>	lock.unlock();
1048
1049	<	/**
1050	<	* awaitNanos is interruptible
1009	<	*/
1010	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1011	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1012	<	final Condition c = lock.writeLock().newCondition();
1013	<	final CountDownLatch locked = new CountDownLatch(1);
1014	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1015	<	public void realRun() throws InterruptedException {
1016	<	lock.writeLock().lock();
1017	<	assertWriteLockedBy(lock, Thread.currentThread());
1018	<	assertHasNoWaiters(lock, c);
1019	<	locked.countDown();
1020	<	try {
1021	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1022	<	} finally {
1023	<	assertWriteLockedBy(lock, Thread.currentThread());
1024	<	assertHasNoWaiters(lock, c);
1025	<	lock.writeLock().unlock();
1026	<	assertFalse(Thread.interrupted());
1027	<	}
1028	<	}});
1029	<
1030	<	locked.await();
1031	<	assertHasWaiters(lock, c, t);
1032	<	t.interrupt();
1033	<	awaitTermination(t);
1034	<	assertNotWriteLocked(lock);
1049	>	awaitTermination(t1);
1050	>	awaitTermination(t2);
1051		}
1052
1053		/**
1054	<	* awaitUntil is interruptible
1054	>	* await/awaitNanos/awaitUntil is interruptible
1055		*/
1056	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1057	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1056	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1057	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1058	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1059	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1061	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1063	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1065	>	final PublicReentrantReadWriteLock lock =
1066	>	new PublicReentrantReadWriteLock(fair);
1067		final Condition c = lock.writeLock().newCondition();
1068		final CountDownLatch locked = new CountDownLatch(1);
1069		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1070		public void realRun() throws InterruptedException {
1071		lock.writeLock().lock();
1072	<	assertWriteLockedBy(lock, Thread.currentThread());
1072	>	assertWriteLockedByMoi(lock);
1073		assertHasNoWaiters(lock, c);
1074		locked.countDown();
1050	–	java.util.Date d = new java.util.Date();
1075		try {
1076	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1076	>	await(c, awaitMethod);
1077		} finally {
1078	<	assertWriteLockedBy(lock, Thread.currentThread());
1078	>	assertWriteLockedByMoi(lock);
1079		assertHasNoWaiters(lock, c);
1080		lock.writeLock().unlock();
1081		assertFalse(Thread.interrupted());
1082		}
1083		}});
1084
1085	<	locked.await();
1085	>	await(locked);
1086		assertHasWaiters(lock, c, t);
1087		t.interrupt();
1088		awaitTermination(t);
#	Line 1068 | Line 1092 | public class ReentrantReadWriteLockTest
1092		/**
1093		* signalAll wakes up all threads
1094		*/
1095	<	public void testSignalAll() throws InterruptedException {
1096	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1095	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1096	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1097	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1098	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1100	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1102	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1104	>	final PublicReentrantReadWriteLock lock =
1105	>	new PublicReentrantReadWriteLock(fair);
1106		final Condition c = lock.writeLock().newCondition();
1107		final CountDownLatch locked = new CountDownLatch(2);
1108		final Lock writeLock = lock.writeLock();
1109	<	Thread t1 = newStartedThread(new CheckedRunnable() {
1109	>	class Awaiter extends CheckedRunnable {
1110		public void realRun() throws InterruptedException {
1111		writeLock.lock();
1112		locked.countDown();
1113	<	c.await();
1113	>	await(c, awaitMethod);
1114		writeLock.unlock();
1115	<	}});
1115	>	}
1116	>	}
1117
1118	<	Thread t2 = newStartedThread(new CheckedRunnable() {
1119	<	public void realRun() throws InterruptedException {
1086	<	writeLock.lock();
1087	<	locked.countDown();
1088	<	c.await();
1089	<	writeLock.unlock();
1090	<	}});
1118	>	Thread t1 = newStartedThread(new Awaiter());
1119	>	Thread t2 = newStartedThread(new Awaiter());
1120
1121	<	locked.await();
1121	>	await(locked);
1122		writeLock.lock();
1123		assertHasWaiters(lock, c, t1, t2);
1124		c.signalAll();
#	Line 1100 | Line 1129 | public class ReentrantReadWriteLockTest
1129		}
1130
1131		/**
1132	<	* signal wakes up waiting threads in FIFO order.
1132	>	* signal wakes up waiting threads in FIFO order
1133		*/
1134	<	public void testSignalWakesFifo() throws InterruptedException {
1135	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1134	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1135	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1136	>	public void testSignalWakesFifo(boolean fair) {
1137	>	final PublicReentrantReadWriteLock lock =
1138	>	new PublicReentrantReadWriteLock(fair);
1139		final Condition c = lock.writeLock().newCondition();
1140		final CountDownLatch locked1 = new CountDownLatch(1);
1141		final CountDownLatch locked2 = new CountDownLatch(1);
#	Line 1116 | Line 1148 | public class ReentrantReadWriteLockTest
1148		writeLock.unlock();
1149		}});
1150
1151	<	locked1.await();
1151	>	await(locked1);
1152
1153		Thread t2 = newStartedThread(new CheckedRunnable() {
1154		public void realRun() throws InterruptedException {
#	Line 1126 | Line 1158 | public class ReentrantReadWriteLockTest
1158		writeLock.unlock();
1159		}});
1160
1161	<	locked2.await();
1161	>	await(locked2);
1162
1163		writeLock.lock();
1164		assertHasWaiters(lock, c, t1, t2);
#	Line 1145 | Line 1177 | public class ReentrantReadWriteLockTest
1177		}
1178
1179		/**
1180	+	* await after multiple reentrant locking preserves lock count
1181	+	*/
1182	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1183	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1184	+	public void testAwaitLockCount(boolean fair) {
1185	+	final PublicReentrantReadWriteLock lock =
1186	+	new PublicReentrantReadWriteLock(fair);
1187	+	final Condition c = lock.writeLock().newCondition();
1188	+	final CountDownLatch locked = new CountDownLatch(2);
1189	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1190	+	public void realRun() throws InterruptedException {
1191	+	lock.writeLock().lock();
1192	+	assertWriteLockedByMoi(lock);
1193	+	assertEquals(1, lock.writeLock().getHoldCount());
1194	+	locked.countDown();
1195	+	c.await();
1196	+	assertWriteLockedByMoi(lock);
1197	+	assertEquals(1, lock.writeLock().getHoldCount());
1198	+	lock.writeLock().unlock();
1199	+	}});
1200	+
1201	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1202	+	public void realRun() throws InterruptedException {
1203	+	lock.writeLock().lock();
1204	+	lock.writeLock().lock();
1205	+	assertWriteLockedByMoi(lock);
1206	+	assertEquals(2, lock.writeLock().getHoldCount());
1207	+	locked.countDown();
1208	+	c.await();
1209	+	assertWriteLockedByMoi(lock);
1210	+	assertEquals(2, lock.writeLock().getHoldCount());
1211	+	lock.writeLock().unlock();
1212	+	lock.writeLock().unlock();
1213	+	}});
1214	+
1215	+	await(locked);
1216	+	lock.writeLock().lock();
1217	+	assertHasWaiters(lock, c, t1, t2);
1218	+	c.signalAll();
1219	+	assertHasNoWaiters(lock, c);
1220	+	lock.writeLock().unlock();
1221	+	awaitTermination(t1);
1222	+	awaitTermination(t2);
1223	+	}
1224	+
1225	+	/**
1226		* A serialized lock deserializes as unlocked
1227		*/
1228	<	public void testSerialization() throws Exception {
1229	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1230	<	l.readLock().lock();
1231	<	l.readLock().unlock();
1232	<
1233	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1234	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1235	<	out.writeObject(l);
1236	<	out.close();
1237	<
1238	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1239	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1240	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1241	<	r.readLock().lock();
1242	<	r.readLock().unlock();
1228	>	public void testSerialization()      { testSerialization(false); }
1229	>	public void testSerialization_fair() { testSerialization(true); }
1230	>	public void testSerialization(boolean fair) {
1231	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1232	>	lock.writeLock().lock();
1233	>	lock.readLock().lock();
1234	>
1235	>	ReentrantReadWriteLock clone = serialClone(lock);
1236	>	assertEquals(lock.isFair(), clone.isFair());
1237	>	assertTrue(lock.isWriteLocked());
1238	>	assertFalse(clone.isWriteLocked());
1239	>	assertEquals(1, lock.getReadLockCount());
1240	>	assertEquals(0, clone.getReadLockCount());
1241	>	clone.writeLock().lock();
1242	>	clone.readLock().lock();
1243	>	assertTrue(clone.isWriteLocked());
1244	>	assertEquals(1, clone.getReadLockCount());
1245	>	clone.readLock().unlock();
1246	>	clone.writeLock().unlock();
1247	>	assertFalse(clone.isWriteLocked());
1248	>	assertEquals(1, lock.getReadLockCount());
1249	>	assertEquals(0, clone.getReadLockCount());
1250		}
1251
1252		/**
1253		* hasQueuedThreads reports whether there are waiting threads
1254		*/
1255	<	public void testhasQueuedThreads() throws InterruptedException {
1256	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1255	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1256	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1257	>	public void testHasQueuedThreads(boolean fair) {
1258	>	final PublicReentrantReadWriteLock lock =
1259	>	new PublicReentrantReadWriteLock(fair);
1260		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262		assertFalse(lock.hasQueuedThreads());
1263		lock.writeLock().lock();
1264		assertFalse(lock.hasQueuedThreads());
1177	–	long startTime = System.nanoTime();
1265		t1.start();
1266		waitForQueuedThread(lock, t1);
1267	+	assertTrue(lock.hasQueuedThreads());
1268		t2.start();
1269		waitForQueuedThread(lock, t2);
1270		assertTrue(lock.hasQueuedThreads());
#	Line 1191 | Line 1279 | public class ReentrantReadWriteLockTest
1279		/**
1280		* hasQueuedThread(null) throws NPE
1281		*/
1282	<	public void testHasQueuedThreadNPE() {
1283	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1282	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1283	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1284	>	public void testHasQueuedThreadNPE(boolean fair) {
1285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1286		try {
1287	<	sync.hasQueuedThread(null);
1287	>	lock.hasQueuedThread(null);
1288		shouldThrow();
1289		} catch (NullPointerException success) {}
1290		}
1291
1292		/**
1293	<	* hasQueuedThread reports whether a thread is queued.
1293	>	* hasQueuedThread reports whether a thread is queued
1294		*/
1295	<	public void testHasQueuedThread() throws InterruptedException {
1296	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1295	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1296	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1297	>	public void testHasQueuedThread(boolean fair) {
1298	>	final PublicReentrantReadWriteLock lock =
1299	>	new PublicReentrantReadWriteLock(fair);
1300		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1301		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1302		assertFalse(lock.hasQueuedThread(t1));
1303		assertFalse(lock.hasQueuedThread(t2));
1304		lock.writeLock().lock();
1212	–	long startTime = System.nanoTime();
1305		t1.start();
1306		waitForQueuedThread(lock, t1);
1307		assertTrue(lock.hasQueuedThread(t1));
#	Line 1231 | Line 1323 | public class ReentrantReadWriteLockTest
1323		/**
1324		* getQueueLength reports number of waiting threads
1325		*/
1326	<	public void testGetQueueLength() throws InterruptedException {
1327	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1326	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1327	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1328	>	public void testGetQueueLength(boolean fair) {
1329	>	final PublicReentrantReadWriteLock lock =
1330	>	new PublicReentrantReadWriteLock(fair);
1331		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1332		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1333		assertEquals(0, lock.getQueueLength());
1334		lock.writeLock().lock();
1240	–	long startTime = System.nanoTime();
1335		t1.start();
1336		waitForQueuedThread(lock, t1);
1337		assertEquals(1, lock.getQueueLength());
#	Line 1255 | Line 1349 | public class ReentrantReadWriteLockTest
1349		/**
1350		* getQueuedThreads includes waiting threads
1351		*/
1352	<	public void testGetQueuedThreads() throws InterruptedException {
1353	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1352	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1353	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1354	>	public void testGetQueuedThreads(boolean fair) {
1355	>	final PublicReentrantReadWriteLock lock =
1356	>	new PublicReentrantReadWriteLock(fair);
1357		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1358		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1359		assertTrue(lock.getQueuedThreads().isEmpty());
1360		lock.writeLock().lock();
1264	–	long startTime = System.nanoTime();
1361		assertTrue(lock.getQueuedThreads().isEmpty());
1362		t1.start();
1363		waitForQueuedThread(lock, t1);
#	Line 1285 | Line 1381 | public class ReentrantReadWriteLockTest
1381		/**
1382		* hasWaiters throws NPE if null
1383		*/
1384	<	public void testHasWaitersNPE() {
1385	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1384	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1385	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1386	>	public void testHasWaitersNPE(boolean fair) {
1387	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1388		try {
1389		lock.hasWaiters(null);
1390		shouldThrow();
#	Line 1296 | Line 1394 | public class ReentrantReadWriteLockTest
1394		/**
1395		* getWaitQueueLength throws NPE if null
1396		*/
1397	<	public void testGetWaitQueueLengthNPE() {
1398	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1398	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1399	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1400	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1401		try {
1402		lock.getWaitQueueLength(null);
1403		shouldThrow();
#	Line 1307 | Line 1407 | public class ReentrantReadWriteLockTest
1407		/**
1408		* getWaitingThreads throws NPE if null
1409		*/
1410	<	public void testGetWaitingThreadsNPE() {
1411	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1410	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1411	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1412	>	public void testGetWaitingThreadsNPE(boolean fair) {
1413	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1414		try {
1415		lock.getWaitingThreads(null);
1416		shouldThrow();
#	Line 1316 | Line 1418 | public class ReentrantReadWriteLockTest
1418		}
1419
1420		/**
1421	<	* hasWaiters throws IAE if not owned
1421	>	* hasWaiters throws IllegalArgumentException if not owned
1422		*/
1423	<	public void testHasWaitersIAE() {
1424	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1423	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1424	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1425	>	public void testHasWaitersIAE(boolean fair) {
1426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1427		final Condition c = lock.writeLock().newCondition();
1428	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1428	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1429		try {
1430		lock2.hasWaiters(c);
1431		shouldThrow();
#	Line 1329 | Line 1433 | public class ReentrantReadWriteLockTest
1433		}
1434
1435		/**
1436	<	* hasWaiters throws IMSE if not locked
1436	>	* hasWaiters throws IllegalMonitorStateException if not locked
1437		*/
1438	<	public void testHasWaitersIMSE() {
1439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1438	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1439	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1440	>	public void testHasWaitersIMSE(boolean fair) {
1441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1442		final Condition c = lock.writeLock().newCondition();
1443		try {
1444		lock.hasWaiters(c);
#	Line 1341 | Line 1447 | public class ReentrantReadWriteLockTest
1447		}
1448
1449		/**
1450	<	* getWaitQueueLength throws IAE if not owned
1450	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1451		*/
1452	<	public void testGetWaitQueueLengthIAE() {
1453	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1452	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1453	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1454	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1455	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1456		final Condition c = lock.writeLock().newCondition();
1457	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1457	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1458		try {
1459		lock2.getWaitQueueLength(c);
1460		shouldThrow();
#	Line 1354 | Line 1462 | public class ReentrantReadWriteLockTest
1462		}
1463
1464		/**
1465	<	* getWaitQueueLength throws IMSE if not locked
1465	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1466		*/
1467	<	public void testGetWaitQueueLengthIMSE() {
1468	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1467	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1468	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1469	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1470	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1471		final Condition c = lock.writeLock().newCondition();
1472		try {
1473		lock.getWaitQueueLength(c);
#	Line 1366 | Line 1476 | public class ReentrantReadWriteLockTest
1476		}
1477
1478		/**
1479	<	* getWaitingThreads throws IAE if not owned
1479	>	* getWaitingThreads throws IllegalArgumentException if not owned
1480		*/
1481	<	public void testGetWaitingThreadsIAE() {
1482	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1481	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1482	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1483	>	public void testGetWaitingThreadsIAE(boolean fair) {
1484	>	final PublicReentrantReadWriteLock lock =
1485	>	new PublicReentrantReadWriteLock(fair);
1486		final Condition c = lock.writeLock().newCondition();
1487	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1487	>	final PublicReentrantReadWriteLock lock2 =
1488	>	new PublicReentrantReadWriteLock(fair);
1489		try {
1490		lock2.getWaitingThreads(c);
1491		shouldThrow();
#	Line 1379 | Line 1493 | public class ReentrantReadWriteLockTest
1493		}
1494
1495		/**
1496	<	* getWaitingThreads throws IMSE if not locked
1496	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1497		*/
1498	<	public void testGetWaitingThreadsIMSE() {
1499	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1498	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1499	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1500	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1501	>	final PublicReentrantReadWriteLock lock =
1502	>	new PublicReentrantReadWriteLock(fair);
1503		final Condition c = lock.writeLock().newCondition();
1504		try {
1505		lock.getWaitingThreads(c);
#	Line 1393 | Line 1510 | public class ReentrantReadWriteLockTest
1510		/**
1511		* hasWaiters returns true when a thread is waiting, else false
1512		*/
1513	<	public void testHasWaiters() throws InterruptedException {
1514	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1513	>	public void testHasWaiters()      { testHasWaiters(false); }
1514	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1515	>	public void testHasWaiters(boolean fair) {
1516	>	final PublicReentrantReadWriteLock lock =
1517	>	new PublicReentrantReadWriteLock(fair);
1518		final Condition c = lock.writeLock().newCondition();
1519		final CountDownLatch locked = new CountDownLatch(1);
1520		Thread t = newStartedThread(new CheckedRunnable() {
1521		public void realRun() throws InterruptedException {
1522		lock.writeLock().lock();
1523	+	assertHasNoWaiters(lock, c);
1524		assertFalse(lock.hasWaiters(c));
1525		locked.countDown();
1405	–	assertEquals(0, lock.getWaitQueueLength(c));
1526		c.await();
1527	+	assertHasNoWaiters(lock, c);
1528	+	assertFalse(lock.hasWaiters(c));
1529		lock.writeLock().unlock();
1530		}});
1531
1532	<	locked.await();
1532	>	await(locked);
1533		lock.writeLock().lock();
1534	+	assertHasWaiters(lock, c, t);
1535		assertTrue(lock.hasWaiters(c));
1413	–	assertEquals(1, lock.getWaitQueueLength(c));
1536		c.signal();
1537		assertHasNoWaiters(lock, c);
1538	+	assertFalse(lock.hasWaiters(c));
1539		lock.writeLock().unlock();
1540		awaitTermination(t);
1541		assertHasNoWaiters(lock, c);
#	Line 1421 | Line 1544 | public class ReentrantReadWriteLockTest
1544		/**
1545		* getWaitQueueLength returns number of waiting threads
1546		*/
1547	<	public void testGetWaitQueueLength() throws InterruptedException {
1548	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1547	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1548	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1549	>	public void testGetWaitQueueLength(boolean fair) {
1550	>	final PublicReentrantReadWriteLock lock =
1551	>	new PublicReentrantReadWriteLock(fair);
1552		final Condition c = lock.writeLock().newCondition();
1553		final CountDownLatch locked = new CountDownLatch(1);
1554		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 1434 | Line 1560 | public class ReentrantReadWriteLockTest
1560		lock.writeLock().unlock();
1561		}});
1562
1563	<	locked.await();
1563	>	await(locked);
1564		lock.writeLock().lock();
1565		assertHasWaiters(lock, c, t);
1566		assertEquals(1, lock.getWaitQueueLength(c));
#	Line 1448 | Line 1574 | public class ReentrantReadWriteLockTest
1574		/**
1575		* getWaitingThreads returns only and all waiting threads
1576		*/
1577	<	public void testGetWaitingThreads() throws InterruptedException {
1578	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1577	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1578	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1579	>	public void testGetWaitingThreads(boolean fair) {
1580	>	final PublicReentrantReadWriteLock lock =
1581	>	new PublicReentrantReadWriteLock(fair);
1582		final Condition c = lock.writeLock().newCondition();
1583		final CountDownLatch locked1 = new CountDownLatch(1);
1584		final CountDownLatch locked2 = new CountDownLatch(1);
#	Line 1476 | Line 1605 | public class ReentrantReadWriteLockTest
1605		lock.writeLock().unlock();
1606
1607		t1.start();
1608	<	locked1.await();
1608	>	await(locked1);
1609		t2.start();
1610	<	locked2.await();
1610	>	await(locked2);
1611
1612		lock.writeLock().lock();
1613		assertTrue(lock.hasWaiters(c));
#	Line 1498 | Line 1627 | public class ReentrantReadWriteLockTest
1627		/**
1628		* toString indicates current lock state
1629		*/
1630	<	public void testToString() {
1631	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1632	<	String us = lock.toString();
1633	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1634	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1635	<	lock.writeLock().lock();
1636	<	String ws = lock.toString();
1637	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1638	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1630	>	public void testToString()      { testToString(false); }
1631	>	public void testToString_fair() { testToString(true); }
1632	>	public void testToString(boolean fair) {
1633	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1634	>	assertTrue(lock.toString().contains("Write locks = 0"));
1635	>	assertTrue(lock.toString().contains("Read locks = 0"));
1636	>	lock.writeLock().lock();
1637	>	assertTrue(lock.toString().contains("Write locks = 1"));
1638	>	assertTrue(lock.toString().contains("Read locks = 0"));
1639	>	lock.writeLock().lock();
1640	>	assertTrue(lock.toString().contains("Write locks = 2"));
1641	>	assertTrue(lock.toString().contains("Read locks = 0"));
1642	>	lock.writeLock().unlock();
1643		lock.writeLock().unlock();
1644		lock.readLock().lock();
1645	+	assertTrue(lock.toString().contains("Write locks = 0"));
1646	+	assertTrue(lock.toString().contains("Read locks = 1"));
1647		lock.readLock().lock();
1648	<	String rs = lock.toString();
1649	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1515	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1648	>	assertTrue(lock.toString().contains("Write locks = 0"));
1649	>	assertTrue(lock.toString().contains("Read locks = 2"));
1650		}
1651
1652		/**
1653		* readLock.toString indicates current lock state
1654		*/
1655	<	public void testReadLockToString() {
1656	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1657	<	String us = lock.readLock().toString();
1658	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1655	>	public void testReadLockToString()      { testReadLockToString(false); }
1656	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1657	>	public void testReadLockToString(boolean fair) {
1658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1660		lock.readLock().lock();
1661	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1662		lock.readLock().lock();
1663	<	String rs = lock.readLock().toString();
1664	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664	>	lock.readLock().unlock();
1665	>	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1666	>	lock.readLock().unlock();
1667	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1668		}
1669
1670		/**
1671		* writeLock.toString indicates current lock state
1672		*/
1673	<	public void testWriteLockToString() {
1674	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1675	<	String us = lock.writeLock().toString();
1676	<	assertTrue(us.indexOf("Unlocked") >= 0);
1677	<	lock.writeLock().lock();
1678	<	String ls = lock.writeLock().toString();
1679	<	assertTrue(ls.indexOf("Locked") >= 0);
1680	<	}
1673	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1674	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1675	>	public void testWriteLockToString(boolean fair) {
1676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678	>	lock.writeLock().lock();
1679	>	assertTrue(lock.writeLock().toString().contains("Locked by"));
1680	>	lock.writeLock().unlock();
1681	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1682	>	}
1683	>
1684	>	/**
1685	>	* ThreadMXBean reports the blockers that we expect.
1686	>	*/
1687	>	public void testBlockers() {
1688	>	if (!testImplementationDetails) return;
1689	>	final boolean fair = randomBoolean();
1690	>	final boolean timedAcquire = randomBoolean();
1691	>	final boolean timedAwait = randomBoolean();
1692	>	final String syncClassName = fair
1693	>	? "ReentrantReadWriteLock$FairSync"
1694	>	: "ReentrantReadWriteLock$NonfairSync";
1695	>	final String conditionClassName
1696	>	= "AbstractQueuedSynchronizer$ConditionObject";
1697	>	final Thread.State expectedAcquireState = timedAcquire
1698	>	? Thread.State.TIMED_WAITING
1699	>	: Thread.State.WAITING;
1700	>	final Thread.State expectedAwaitState = timedAwait
1701	>	? Thread.State.TIMED_WAITING
1702	>	: Thread.State.WAITING;
1703	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1704	>	final Condition condition = lock.newCondition();
1705	>	final AtomicBoolean conditionSatisfied = new AtomicBoolean(false);
1706	>	lock.lock();
1707	>	final Thread thread = newStartedThread((Action) () -> {
1708	>	if (timedAcquire)
1709	>	lock.tryLock(LONGER_DELAY_MS, MILLISECONDS);
1710	>	else
1711	>	lock.lock();
1712	>	while (!conditionSatisfied.get())
1713	>	if (timedAwait)
1714	>	condition.await(LONGER_DELAY_MS, MILLISECONDS);
1715	>	else
1716	>	condition.await();
1717	>	});
1718	>	Callable<Boolean> waitingForLock = () -> {
1719	>	String className;
1720	>	return thread.getState() == expectedAcquireState
1721	>	&& (className = blockerClassName(thread)) != null
1722	>	&& className.endsWith(syncClassName);
1723	>	};
1724	>	waitForThreadToEnterWaitState(thread, waitingForLock);
1725	>
1726	>	lock.unlock();
1727	>	Callable<Boolean> waitingForCondition = () -> {
1728	>	String className;
1729	>	return thread.getState() == expectedAwaitState
1730	>	&& (className = blockerClassName(thread)) != null
1731	>	&& className.endsWith(conditionClassName);
1732	>	};
1733	>	waitForThreadToEnterWaitState(thread, waitingForCondition);
1734	>
1735	>	// politely release the waiter
1736	>	conditionSatisfied.set(true);
1737	>	lock.lock();
1738	>	try {
1739	>	condition.signal();
1740	>	} finally { lock.unlock(); }
1741
1742	+	awaitTermination(thread);
1743	+	}
1744		}

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