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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.56 by jsr166, Tue May 3 06:08:49 2011 UTC vs.
Revision 1.69 by jsr166, Wed Dec 31 19:05:43 2014 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;
10	<	import java.io.*;
11	<	import java.util.*;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
#	Line 50 | Line 57 | public class ReentrantReadWriteLockTest
57		*/
58		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59		PublicReentrantReadWriteLock() { super(); }
60	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	+	public Thread getOwner() {
62	+	return super.getOwner();
63	+	}
64		public Collection<Thread> getQueuedThreads() {
65		return super.getQueuedThreads();
66		}
#	Line 61 | Line 72 | public class ReentrantReadWriteLockTest
72		/**
73		* Releases write lock, checking that it had a hold count of 1.
74		*/
75	<	void releaseWriteLock(ReentrantReadWriteLock lock) {
75	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76		ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	<	assertTrue(writeLock.isHeldByCurrentThread());
77	>	assertWriteLockedByMoi(lock);
78	>	assertEquals(1, lock.getWriteHoldCount());
79		writeLock.unlock();
80	<	assertFalse(writeLock.isHeldByCurrentThread());
80	>	assertNotWriteLocked(lock);
81		}
82
83		/**
84		* Spin-waits until lock.hasQueuedThread(t) becomes true.
85		*/
86	<	void waitForQueuedThread(ReentrantReadWriteLock lock, Thread t) {
86	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
87		long startTime = System.nanoTime();
88		while (!lock.hasQueuedThread(t)) {
89		if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	<	throw new AssertionError("timed out");
90	>	throw new AssertionFailedError("timed out");
91		Thread.yield();
92		}
93	+	assertTrue(t.isAlive());
94	+	assertNotSame(t, lock.getOwner());
95		}
96
97		/**
98		* Checks that lock is not write-locked.
99		*/
100	<	void assertNotWriteLocked(ReentrantReadWriteLock lock) {
100	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
101		assertFalse(lock.isWriteLocked());
102		assertFalse(lock.isWriteLockedByCurrentThread());
103	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
104		assertEquals(0, lock.getWriteHoldCount());
105	+	assertEquals(0, lock.writeLock().getHoldCount());
106	+	assertNull(lock.getOwner());
107	+	}
108	+
109	+	/**
110	+	* Checks that lock is write-locked by the given thread.
111	+	*/
112	+	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
113	+	assertTrue(lock.isWriteLocked());
114	+	assertSame(t, lock.getOwner());
115	+	assertEquals(t == Thread.currentThread(),
116	+	lock.isWriteLockedByCurrentThread());
117	+	assertEquals(t == Thread.currentThread(),
118	+	lock.writeLock().isHeldByCurrentThread());
119	+	assertEquals(t == Thread.currentThread(),
120	+	lock.getWriteHoldCount() > 0);
121	+	assertEquals(t == Thread.currentThread(),
122	+	lock.writeLock().getHoldCount() > 0);
123	+	assertEquals(0, lock.getReadLockCount());
124	+	}
125	+
126	+	/**
127	+	* Checks that lock is write-locked by the current thread.
128	+	*/
129	+	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	+	assertWriteLockedBy(lock, Thread.currentThread());
131		}
132
133		/**
#	Line 111 | Line 152 | public class ReentrantReadWriteLockTest
152		lock.writeLock().unlock();
153		}
154
155	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	+
157		/**
158	<	* Constructor sets given fairness, and is in unlocked state
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160	<	public void testConstructor() {
161	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
162	<	assertFalse(rl.isFair());
163	<	assertFalse(rl.isWriteLocked());
164	<	assertEquals(0, rl.getReadLockCount());
165	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
166	<	assertTrue(r2.isFair());
167	<	assertFalse(r2.isWriteLocked());
168	<	assertEquals(0, r2.getReadLockCount());
169	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
170	<	assertFalse(r3.isFair());
171	<	assertFalse(r3.isWriteLocked());
172	<	assertEquals(0, r3.getReadLockCount());
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	switch (awaitMethod) {
163	>	case await:
164	>	c.await();
165	>	break;
166	>	case awaitTimed:
167	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
168	>	break;
169	>	case awaitNanos:
170	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
171	>	assertTrue(nanosRemaining > 0);
172	>	break;
173	>	case awaitUntil:
174	>	java.util.Date d = new java.util.Date();
175	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
176	>	break;
177	>	}
178		}
179
180		/**
181	<	* write-locking and read-locking an unlocked lock succeed
181	>	* Constructor sets given fairness, and is in unlocked state
182		*/
183	<	public void testLock() {
184	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
185	<	rl.writeLock().lock();
186	<	assertTrue(rl.isWriteLocked());
187	<	assertTrue(rl.isWriteLockedByCurrentThread());
188	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
189	<	assertEquals(0, rl.getReadLockCount());
190	<	rl.writeLock().unlock();
191	<	assertFalse(rl.isWriteLocked());
192	<	assertFalse(rl.isWriteLockedByCurrentThread());
193	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
194	<	assertEquals(0, rl.getReadLockCount());
195	<	rl.readLock().lock();
196	<	assertFalse(rl.isWriteLocked());
197	<	assertFalse(rl.isWriteLockedByCurrentThread());
198	<	assertEquals(1, rl.getReadLockCount());
199	<	rl.readLock().unlock();
152	<	assertFalse(rl.isWriteLocked());
153	<	assertFalse(rl.isWriteLockedByCurrentThread());
154	<	assertEquals(0, rl.getReadLockCount());
183	>	public void testConstructor() {
184	>	PublicReentrantReadWriteLock lock;
185	>
186	>	lock = new PublicReentrantReadWriteLock();
187	>	assertFalse(lock.isFair());
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>
191	>	lock = new PublicReentrantReadWriteLock(true);
192	>	assertTrue(lock.isFair());
193	>	assertNotWriteLocked(lock);
194	>	assertEquals(0, lock.getReadLockCount());
195	>
196	>	lock = new PublicReentrantReadWriteLock(false);
197	>	assertFalse(lock.isFair());
198	>	assertNotWriteLocked(lock);
199	>	assertEquals(0, lock.getReadLockCount());
200		}
201
202		/**
203	<	* locking an unlocked fair lock succeeds
204	<	*/
205	<	public void testFairLock() {
206	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
207	<	rl.writeLock().lock();
208	<	assertTrue(rl.isWriteLocked());
209	<	assertTrue(rl.isWriteLockedByCurrentThread());
210	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
211	<	assertEquals(0, rl.getReadLockCount());
212	<	rl.writeLock().unlock();
213	<	assertFalse(rl.isWriteLocked());
214	<	assertFalse(rl.isWriteLockedByCurrentThread());
215	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
216	<	assertEquals(0, rl.getReadLockCount());
217	<	rl.readLock().lock();
218	<	assertFalse(rl.isWriteLocked());
219	<	assertFalse(rl.isWriteLockedByCurrentThread());
220	<	assertEquals(1, rl.getReadLockCount());
221	<	rl.readLock().unlock();
177	<	assertFalse(rl.isWriteLocked());
178	<	assertFalse(rl.isWriteLockedByCurrentThread());
179	<	assertEquals(0, rl.getReadLockCount());
203	>	* write-locking and read-locking an unlocked lock succeed
204	>	*/
205	>	public void testLock()      { testLock(false); }
206	>	public void testLock_fair() { testLock(true); }
207	>	public void testLock(boolean fair) {
208	>	PublicReentrantReadWriteLock lock =
209	>	new PublicReentrantReadWriteLock(fair);
210	>	assertNotWriteLocked(lock);
211	>	lock.writeLock().lock();
212	>	assertWriteLockedByMoi(lock);
213	>	lock.writeLock().unlock();
214	>	assertNotWriteLocked(lock);
215	>	assertEquals(0, lock.getReadLockCount());
216	>	lock.readLock().lock();
217	>	assertNotWriteLocked(lock);
218	>	assertEquals(1, lock.getReadLockCount());
219	>	lock.readLock().unlock();
220	>	assertNotWriteLocked(lock);
221	>	assertEquals(0, lock.getReadLockCount());
222		}
223
224		/**
225		* getWriteHoldCount returns number of recursive holds
226		*/
227	<	public void testGetWriteHoldCount() {
228	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
227	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
228	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
229	>	public void testGetWriteHoldCount(boolean fair) {
230	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
231		for (int i = 1; i <= SIZE; i++) {
232		lock.writeLock().lock();
233		assertEquals(i,lock.getWriteHoldCount());
#	Line 195 | Line 239 | public class ReentrantReadWriteLockTest
239		}
240
241		/**
242	<	* WriteLock.getHoldCount returns number of recursive holds
242	>	* writelock.getHoldCount returns number of recursive holds
243		*/
244	<	public void testGetHoldCount() {
245	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
244	>	public void testGetHoldCount()      { testGetHoldCount(false); }
245	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
246	>	public void testGetHoldCount(boolean fair) {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
248		for (int i = 1; i <= SIZE; i++) {
249		lock.writeLock().lock();
250		assertEquals(i,lock.writeLock().getHoldCount());
#	Line 212 | Line 258 | public class ReentrantReadWriteLockTest
258		/**
259		* getReadHoldCount returns number of recursive holds
260		*/
261	<	public void testGetReadHoldCount() {
262	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
261	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
262	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
263	>	public void testGetReadHoldCount(boolean fair) {
264	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
265		for (int i = 1; i <= SIZE; i++) {
266		lock.readLock().lock();
267		assertEquals(i,lock.getReadHoldCount());
#	Line 227 | Line 275 | public class ReentrantReadWriteLockTest
275		/**
276		* write-unlocking an unlocked lock throws IllegalMonitorStateException
277		*/
278	<	public void testWriteUnlock_IllegalMonitorStateException() {
279	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
278	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
279	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
280	>	public void testWriteUnlock_IMSE(boolean fair) {
281	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
282		try {
283	<	rl.writeLock().unlock();
283	>	lock.writeLock().unlock();
284		shouldThrow();
285		} catch (IllegalMonitorStateException success) {}
286		}
#	Line 238 | Line 288 | public class ReentrantReadWriteLockTest
288		/**
289		* read-unlocking an unlocked lock throws IllegalMonitorStateException
290		*/
291	<	public void testReadUnlock_IllegalMonitorStateException() {
292	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
291	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
292	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
293	>	public void testReadUnlock_IMSE(boolean fair) {
294	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
295		try {
296	<	rl.readLock().unlock();
296	>	lock.readLock().unlock();
297		shouldThrow();
298		} catch (IllegalMonitorStateException success) {}
299		}
#	Line 249 | Line 301 | public class ReentrantReadWriteLockTest
301		/**
302		* write-lockInterruptibly is interruptible
303		*/
304	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
305	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
305	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
306	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
307	>	final PublicReentrantReadWriteLock lock =
308	>	new PublicReentrantReadWriteLock(fair);
309		lock.writeLock().lock();
310		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311		public void realRun() throws InterruptedException {
#	Line 266 | Line 321 | public class ReentrantReadWriteLockTest
321		/**
322		* timed write-tryLock is interruptible
323		*/
324	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
325	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
324	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
325	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
326	>	public void testWriteTryLock_Interruptible(boolean fair) {
327	>	final PublicReentrantReadWriteLock lock =
328	>	new PublicReentrantReadWriteLock(fair);
329		lock.writeLock().lock();
330		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
331		public void realRun() throws InterruptedException {
332	<	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
332	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
333		}});
334
335		waitForQueuedThread(lock, t);
#	Line 283 | Line 341 | public class ReentrantReadWriteLockTest
341		/**
342		* read-lockInterruptibly is interruptible
343		*/
344	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
345	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
344	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
345	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
346	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
347	>	final PublicReentrantReadWriteLock lock =
348	>	new PublicReentrantReadWriteLock(fair);
349		lock.writeLock().lock();
350		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
351		public void realRun() throws InterruptedException {
#	Line 300 | Line 361 | public class ReentrantReadWriteLockTest
361		/**
362		* timed read-tryLock is interruptible
363		*/
364	<	public void testReadTryLock_Interrupted() throws InterruptedException {
365	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
364	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
365	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
366	>	public void testReadTryLock_Interruptible(boolean fair) {
367	>	final PublicReentrantReadWriteLock lock =
368	>	new PublicReentrantReadWriteLock(fair);
369		lock.writeLock().lock();
370		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
371		public void realRun() throws InterruptedException {
372	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
372	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
373		}});
374
375		waitForQueuedThread(lock, t);
#	Line 315 | Line 379 | public class ReentrantReadWriteLockTest
379		}
380
381		/**
382	+	* write-tryLock on an unlocked lock succeeds
383	+	*/
384	+	public void testWriteTryLock()      { testWriteTryLock(false); }
385	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
386	+	public void testWriteTryLock(boolean fair) {
387	+	final PublicReentrantReadWriteLock lock =
388	+	new PublicReentrantReadWriteLock(fair);
389	+	assertTrue(lock.writeLock().tryLock());
390	+	assertWriteLockedByMoi(lock);
391	+	assertTrue(lock.writeLock().tryLock());
392	+	assertWriteLockedByMoi(lock);
393	+	lock.writeLock().unlock();
394	+	releaseWriteLock(lock);
395	+	}
396	+
397	+	/**
398		* write-tryLock fails if locked
399		*/
400	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
401	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
400	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
401	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
402	>	public void testWriteTryLockWhenLocked(boolean fair) {
403	>	final PublicReentrantReadWriteLock lock =
404	>	new PublicReentrantReadWriteLock(fair);
405		lock.writeLock().lock();
406		Thread t = newStartedThread(new CheckedRunnable() {
407		public void realRun() {
#	Line 332 | Line 415 | public class ReentrantReadWriteLockTest
415		/**
416		* read-tryLock fails if locked
417		*/
418	<	public void testReadTryLockWhenLocked() throws InterruptedException {
419	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
418	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
419	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
420	>	public void testReadTryLockWhenLocked(boolean fair) {
421	>	final PublicReentrantReadWriteLock lock =
422	>	new PublicReentrantReadWriteLock(fair);
423		lock.writeLock().lock();
424		Thread t = newStartedThread(new CheckedRunnable() {
425		public void realRun() {
#	Line 347 | Line 433 | public class ReentrantReadWriteLockTest
433		/**
434		* Multiple threads can hold a read lock when not write-locked
435		*/
436	<	public void testMultipleReadLocks() throws InterruptedException {
437	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
436	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
437	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
438	>	public void testMultipleReadLocks(boolean fair) {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
440		lock.readLock().lock();
441		Thread t = newStartedThread(new CheckedRunnable() {
442	<	public void realRun() {
442	>	public void realRun() throws InterruptedException {
443		assertTrue(lock.readLock().tryLock());
444		lock.readLock().unlock();
445	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
446	+	lock.readLock().unlock();
447	+	lock.readLock().lock();
448	+	lock.readLock().unlock();
449		}});
450
451		awaitTermination(t);
#	Line 361 | Line 453 | public class ReentrantReadWriteLockTest
453		}
454
455		/**
456	<	* A writelock succeeds only after reading threads unlock
456	>	* A writelock succeeds only after a reading thread unlocks
457		*/
458	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
459	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
458	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
459	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
460	>	public void testWriteAfterReadLock(boolean fair) {
461	>	final PublicReentrantReadWriteLock lock =
462	>	new PublicReentrantReadWriteLock(fair);
463		lock.readLock().lock();
464	<	Thread t1 = newStartedThread(new CheckedRunnable() {
370	<	public void realRun() {
371	<	lock.readLock().lock();
372	<	lock.readLock().unlock();
373	<	}});
374	<	Thread t2 = newStartedThread(new CheckedRunnable() {
464	>	Thread t = newStartedThread(new CheckedRunnable() {
465		public void realRun() {
466	+	assertEquals(1, lock.getReadLockCount());
467		lock.writeLock().lock();
468	+	assertEquals(0, lock.getReadLockCount());
469		lock.writeLock().unlock();
470		}});
471	<
380	<	awaitTermination(t1);
381	<	waitForQueuedThread(lock, t2);
471	>	waitForQueuedThread(lock, t);
472		assertNotWriteLocked(lock);
473	+	assertEquals(1, lock.getReadLockCount());
474		lock.readLock().unlock();
475	<	awaitTermination(t2);
475	>	assertEquals(0, lock.getReadLockCount());
476	>	awaitTermination(t);
477	>	assertNotWriteLocked(lock);
478		}
479
480		/**
481	<	* Readlocks succeed only after a writing thread unlocks
481	>	* A writelock succeeds only after reading threads unlock
482		*/
483	<	public void testReadAfterWriteLock() throws InterruptedException {
484	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
485	<	lock.writeLock().lock();
483	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
484	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
485	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
486	>	final PublicReentrantReadWriteLock lock =
487	>	new PublicReentrantReadWriteLock(fair);
488	>	lock.readLock().lock();
489	>	lock.readLock().lock();
490		Thread t1 = newStartedThread(new CheckedRunnable() {
491		public void realRun() {
492		lock.readLock().lock();
493	+	assertEquals(3, lock.getReadLockCount());
494		lock.readLock().unlock();
495		}});
496	+	awaitTermination(t1);
497	+
498		Thread t2 = newStartedThread(new CheckedRunnable() {
499		public void realRun() {
500	<	lock.readLock().lock();
501	<	lock.readLock().unlock();
500	>	assertEquals(2, lock.getReadLockCount());
501	>	lock.writeLock().lock();
502	>	assertEquals(0, lock.getReadLockCount());
503	>	lock.writeLock().unlock();
504		}});
403	–
404	–	waitForQueuedThread(lock, t1);
505		waitForQueuedThread(lock, t2);
506	<	releaseWriteLock(lock);
507	<	awaitTermination(t1);
506	>	assertNotWriteLocked(lock);
507	>	assertEquals(2, lock.getReadLockCount());
508	>	lock.readLock().unlock();
509	>	lock.readLock().unlock();
510	>	assertEquals(0, lock.getReadLockCount());
511		awaitTermination(t2);
512	+	assertNotWriteLocked(lock);
513		}
514
515		/**
516	<	* Read trylock succeeds if write locked by current thread
516	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
517	>	* will block if there is a waiting writer thread
518		*/
519	<	public void testReadHoldingWriteLock() {
520	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
521	<	lock.writeLock().lock();
522	<	assertTrue(lock.readLock().tryLock());
418	<	lock.readLock().unlock();
419	<	lock.writeLock().unlock();
420	<	}
519	>	public void testReaderWriterReaderFairFifo() {
520	>	final PublicReentrantReadWriteLock lock =
521	>	new PublicReentrantReadWriteLock(true);
522	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
523
422	–	/**
423	–	* Read lock succeeds if write locked by current thread even if
424	–	* other threads are waiting for readlock
425	–	*/
426	–	public void testReadHoldingWriteLock2() throws InterruptedException {
427	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
428	–	lock.writeLock().lock();
524		lock.readLock().lock();
430	–	lock.readLock().unlock();
431	–
525		Thread t1 = newStartedThread(new CheckedRunnable() {
526		public void realRun() {
527	<	lock.readLock().lock();
528	<	lock.readLock().unlock();
527	>	assertEquals(1, lock.getReadLockCount());
528	>	lock.writeLock().lock();
529	>	assertEquals(0, lock.getReadLockCount());
530	>	t1GotLock.set(true);
531	>	lock.writeLock().unlock();
532		}});
533	+	waitForQueuedThread(lock, t1);
534	+
535		Thread t2 = newStartedThread(new CheckedRunnable() {
536		public void realRun() {
537	+	assertEquals(1, lock.getReadLockCount());
538		lock.readLock().lock();
539	+	assertEquals(1, lock.getReadLockCount());
540	+	assertTrue(t1GotLock.get());
541		lock.readLock().unlock();
542		}});
442	–
443	–	waitForQueuedThread(lock, t1);
543		waitForQueuedThread(lock, t2);
544	<	assertTrue(lock.isWriteLockedByCurrentThread());
545	<	lock.readLock().lock();
544	>	assertTrue(t1.isAlive());
545	>	assertNotWriteLocked(lock);
546	>	assertEquals(1, lock.getReadLockCount());
547		lock.readLock().unlock();
448	–	releaseWriteLock(lock);
548		awaitTermination(t1);
549		awaitTermination(t2);
550	+	assertNotWriteLocked(lock);
551		}
552
553		/**
554	<	* Read lock succeeds if write locked by current thread even if
455	<	* other threads are waiting for writelock
554	>	* Readlocks succeed only after a writing thread unlocks
555		*/
556	<	public void testReadHoldingWriteLock3() throws InterruptedException {
557	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
556	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
557	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
558	>	public void testReadAfterWriteLock(boolean fair) {
559	>	final PublicReentrantReadWriteLock lock =
560	>	new PublicReentrantReadWriteLock(fair);
561		lock.writeLock().lock();
460	–	lock.readLock().lock();
461	–	lock.readLock().unlock();
462	–
562		Thread t1 = newStartedThread(new CheckedRunnable() {
563		public void realRun() {
564	<	lock.writeLock().lock();
565	<	lock.writeLock().unlock();
564	>	lock.readLock().lock();
565	>	lock.readLock().unlock();
566		}});
567		Thread t2 = newStartedThread(new CheckedRunnable() {
568		public void realRun() {
569	<	lock.writeLock().lock();
570	<	lock.writeLock().unlock();
569	>	lock.readLock().lock();
570	>	lock.readLock().unlock();
571		}});
572
573		waitForQueuedThread(lock, t1);
574		waitForQueuedThread(lock, t2);
476	–	assertTrue(lock.isWriteLockedByCurrentThread());
477	–	lock.readLock().lock();
478	–	lock.readLock().unlock();
575		releaseWriteLock(lock);
576		awaitTermination(t1);
577		awaitTermination(t2);
578		}
579
580		/**
581	<	* Write lock succeeds if write locked by current thread even if
486	<	* other threads are waiting for writelock
581	>	* Read trylock succeeds if write locked by current thread
582		*/
583	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
584	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
585	<	lock.writeLock().lock();
583	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
584	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
585	>	public void testReadHoldingWriteLock(boolean fair) {
586	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
587		lock.writeLock().lock();
588	+	assertTrue(lock.readLock().tryLock());
589	+	lock.readLock().unlock();
590		lock.writeLock().unlock();
591	+	}
592	+
593	+	/**
594	+	* Read trylock succeeds (barging) even in the presence of waiting
595	+	* readers and/or writers
596	+	*/
597	+	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
598	+	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
599	+	public void testReadTryLockBarging(boolean fair) {
600	+	final PublicReentrantReadWriteLock lock =
601	+	new PublicReentrantReadWriteLock(fair);
602	+	lock.readLock().lock();
603
604		Thread t1 = newStartedThread(new CheckedRunnable() {
605		public void realRun() {
606		lock.writeLock().lock();
607		lock.writeLock().unlock();
608		}});
609	+
610	+	waitForQueuedThread(lock, t1);
611	+
612		Thread t2 = newStartedThread(new CheckedRunnable() {
613		public void realRun() {
614	<	lock.writeLock().lock();
615	<	lock.writeLock().unlock();
614	>	lock.readLock().lock();
615	>	lock.readLock().unlock();
616		}});
617
618	<	waitForQueuedThread(lock, t1);
619	<	waitForQueuedThread(lock, t2);
507	<	assertTrue(lock.isWriteLockedByCurrentThread());
508	<	assertEquals(1, lock.getWriteHoldCount());
509	<	lock.writeLock().lock();
510	<	assertTrue(lock.isWriteLockedByCurrentThread());
511	<	assertEquals(2, lock.getWriteHoldCount());
512	<	lock.writeLock().unlock();
513	<	releaseWriteLock(lock);
514	<	awaitTermination(t1);
515	<	awaitTermination(t2);
516	<	}
618	>	if (fair)
619	>	waitForQueuedThread(lock, t2);
620
621	<	/**
622	<	* Fair Read trylock succeeds if write locked by current thread
623	<	*/
624	<	public void testReadHoldingWriteLockFair() {
625	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
626	<	lock.writeLock().lock();
627	<	assertTrue(lock.readLock().tryLock());
621	>	Thread t3 = newStartedThread(new CheckedRunnable() {
622	>	public void realRun() {
623	>	lock.readLock().tryLock();
624	>	lock.readLock().unlock();
625	>	}});
626	>
627	>	assertTrue(lock.getReadLockCount() > 0);
628	>	awaitTermination(t3);
629	>	assertTrue(t1.isAlive());
630	>	if (fair) assertTrue(t2.isAlive());
631		lock.readLock().unlock();
632	<	lock.writeLock().unlock();
632	>	awaitTermination(t1);
633	>	awaitTermination(t2);
634		}
635
636		/**
637	<	* Fair Read lock succeeds if write locked by current thread even if
637	>	* Read lock succeeds if write locked by current thread even if
638		* other threads are waiting for readlock
639		*/
640	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
641	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
640	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
641	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
642	>	public void testReadHoldingWriteLock2(boolean fair) {
643	>	final PublicReentrantReadWriteLock lock =
644	>	new PublicReentrantReadWriteLock(fair);
645		lock.writeLock().lock();
646		lock.readLock().lock();
647		lock.readLock().unlock();
#	Line 549 | Line 659 | public class ReentrantReadWriteLockTest
659
660		waitForQueuedThread(lock, t1);
661		waitForQueuedThread(lock, t2);
662	<	assertTrue(lock.isWriteLockedByCurrentThread());
662	>	assertWriteLockedByMoi(lock);
663		lock.readLock().lock();
664		lock.readLock().unlock();
665		releaseWriteLock(lock);
#	Line 558 | Line 668 | public class ReentrantReadWriteLockTest
668		}
669
670		/**
671	<	* Fair Read lock succeeds if write locked by current thread even if
671	>	* Read lock succeeds if write locked by current thread even if
672		* other threads are waiting for writelock
673		*/
674	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
675	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
674	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
675	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
676	>	public void testReadHoldingWriteLock3(boolean fair) {
677	>	final PublicReentrantReadWriteLock lock =
678	>	new PublicReentrantReadWriteLock(fair);
679		lock.writeLock().lock();
680		lock.readLock().lock();
681		lock.readLock().unlock();
#	Line 580 | Line 693 | public class ReentrantReadWriteLockTest
693
694		waitForQueuedThread(lock, t1);
695		waitForQueuedThread(lock, t2);
696	<	assertTrue(lock.isWriteLockedByCurrentThread());
696	>	assertWriteLockedByMoi(lock);
697		lock.readLock().lock();
698		lock.readLock().unlock();
699	<	releaseWriteLock(lock);
699	>	assertWriteLockedByMoi(lock);
700	>	lock.writeLock().unlock();
701		awaitTermination(t1);
702		awaitTermination(t2);
703		}
704
705		/**
706	<	* Fair Write lock succeeds if write locked by current thread even if
706	>	* Write lock succeeds if write locked by current thread even if
707		* other threads are waiting for writelock
708		*/
709	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
710	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
709	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
710	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
711	>	public void testWriteHoldingWriteLock4(boolean fair) {
712	>	final PublicReentrantReadWriteLock lock =
713	>	new PublicReentrantReadWriteLock(fair);
714	>	lock.writeLock().lock();
715		lock.writeLock().lock();
716	+	lock.writeLock().unlock();
717	+
718		Thread t1 = newStartedThread(new CheckedRunnable() {
719		public void realRun() {
720		lock.writeLock().lock();
#	Line 608 | Line 728 | public class ReentrantReadWriteLockTest
728
729		waitForQueuedThread(lock, t1);
730		waitForQueuedThread(lock, t2);
731	<	assertTrue(lock.isWriteLockedByCurrentThread());
731	>	assertWriteLockedByMoi(lock);
732		assertEquals(1, lock.getWriteHoldCount());
733		lock.writeLock().lock();
734	+	assertWriteLockedByMoi(lock);
735		assertEquals(2, lock.getWriteHoldCount());
736		lock.writeLock().unlock();
737	<	lock.writeLock().lock();
737	>	assertWriteLockedByMoi(lock);
738	>	assertEquals(1, lock.getWriteHoldCount());
739		lock.writeLock().unlock();
618	–	releaseWriteLock(lock);
740		awaitTermination(t1);
741		awaitTermination(t2);
742		}
#	Line 623 | Line 744 | public class ReentrantReadWriteLockTest
744		/**
745		* Read tryLock succeeds if readlocked but not writelocked
746		*/
747	<	public void testTryLockWhenReadLocked() throws InterruptedException {
748	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
747	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
748	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
749	>	public void testTryLockWhenReadLocked(boolean fair) {
750	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
751		lock.readLock().lock();
752		Thread t = newStartedThread(new CheckedRunnable() {
753		public void realRun() {
#	Line 639 | Line 762 | public class ReentrantReadWriteLockTest
762		/**
763		* write tryLock fails when readlocked
764		*/
765	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
766	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
767	<	lock.readLock().lock();
768	<	Thread t = newStartedThread(new CheckedRunnable() {
646	<	public void realRun() {
647	<	assertFalse(lock.writeLock().tryLock());
648	<	}});
649	<
650	<	awaitTermination(t);
651	<	lock.readLock().unlock();
652	<	}
653	<
654	<	/**
655	<	* Fair Read tryLock succeeds if readlocked but not writelocked
656	<	*/
657	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
658	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
659	<	lock.readLock().lock();
660	<	Thread t = newStartedThread(new CheckedRunnable() {
661	<	public void realRun() {
662	<	assertTrue(lock.readLock().tryLock());
663	<	lock.readLock().unlock();
664	<	}});
665	<
666	<	awaitTermination(t);
667	<	lock.readLock().unlock();
668	<	}
669	<
670	<	/**
671	<	* Fair write tryLock fails when readlocked
672	<	*/
673	<	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
674	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
765	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
766	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
767	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
768	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
769		lock.readLock().lock();
770		Thread t = newStartedThread(new CheckedRunnable() {
771		public void realRun() {
#	Line 685 | Line 779 | public class ReentrantReadWriteLockTest
779		/**
780		* write timed tryLock times out if locked
781		*/
782	<	public void testWriteTryLock_Timeout() throws InterruptedException {
783	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
782	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
783	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
784	>	public void testWriteTryLock_Timeout(boolean fair) {
785	>	final PublicReentrantReadWriteLock lock =
786	>	new PublicReentrantReadWriteLock(fair);
787		lock.writeLock().lock();
788		Thread t = newStartedThread(new CheckedRunnable() {
789		public void realRun() throws InterruptedException {
790	<	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
790	>	long startTime = System.nanoTime();
791	>	long timeoutMillis = 10;
792	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
793	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
794		}});
795
796		awaitTermination(t);
797	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
698	<	lock.writeLock().unlock();
797	>	releaseWriteLock(lock);
798		}
799
800		/**
801		* read timed tryLock times out if write-locked
802		*/
803	<	public void testReadTryLock_Timeout() throws InterruptedException {
804	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
803	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
804	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
805	>	public void testReadTryLock_Timeout(boolean fair) {
806	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
807		lock.writeLock().lock();
808		Thread t = newStartedThread(new CheckedRunnable() {
809		public void realRun() throws InterruptedException {
810	<	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
810	>	long startTime = System.nanoTime();
811	>	long timeoutMillis = 10;
812	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
813	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
814		}});
815
816		awaitTermination(t);
#	Line 715 | Line 819 | public class ReentrantReadWriteLockTest
819		}
820
821		/**
822	<	* write lockInterruptibly succeeds if lock free else is interruptible
822	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
823		*/
824	<	public void testWriteLockInterruptibly() throws InterruptedException {
825	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
826	<	lock.writeLock().lockInterruptibly();
824	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
825	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
826	>	public void testWriteLockInterruptibly(boolean fair) {
827	>	final PublicReentrantReadWriteLock lock =
828	>	new PublicReentrantReadWriteLock(fair);
829	>	try {
830	>	lock.writeLock().lockInterruptibly();
831	>	} catch (InterruptedException ie) {
832	>	threadUnexpectedException(ie);
833	>	}
834		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
835		public void realRun() throws InterruptedException {
836		lock.writeLock().lockInterruptibly();
#	Line 727 | Line 838 | public class ReentrantReadWriteLockTest
838
839		waitForQueuedThread(lock, t);
840		t.interrupt();
841	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
842		awaitTermination(t);
843		releaseWriteLock(lock);
844		}
#	Line 734 | Line 846 | public class ReentrantReadWriteLockTest
846		/**
847		* read lockInterruptibly succeeds if lock free else is interruptible
848		*/
849	<	public void testReadLockInterruptibly() throws InterruptedException {
850	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	<	lock.writeLock().lockInterruptibly();
849	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
850	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
851	>	public void testReadLockInterruptibly(boolean fair) {
852	>	final PublicReentrantReadWriteLock lock =
853	>	new PublicReentrantReadWriteLock(fair);
854	>	try {
855	>	lock.readLock().lockInterruptibly();
856	>	lock.readLock().unlock();
857	>	lock.writeLock().lockInterruptibly();
858	>	} catch (InterruptedException ie) {
859	>	threadUnexpectedException(ie);
860	>	}
861		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
862		public void realRun() throws InterruptedException {
863		lock.readLock().lockInterruptibly();
#	Line 751 | Line 872 | public class ReentrantReadWriteLockTest
872		/**
873		* Calling await without holding lock throws IllegalMonitorStateException
874		*/
875	<	public void testAwait_IllegalMonitor() throws InterruptedException {
876	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
877	<	final Condition c = lock.writeLock().newCondition();
878	<	try {
879	<	c.await();
880	<	shouldThrow();
881	<	} catch (IllegalMonitorStateException success) {}
882	<	try {
883	<	c.await(LONG_DELAY_MS, MILLISECONDS);
884	<	shouldThrow();
885	<	} catch (IllegalMonitorStateException success) {}
886	<	try {
887	<	c.awaitNanos(100);
888	<	shouldThrow();
768	<	} catch (IllegalMonitorStateException success) {}
769	<	try {
770	<	c.awaitUninterruptibly();
771	<	shouldThrow();
772	<	} catch (IllegalMonitorStateException success) {}
875	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
876	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
877	>	public void testAwait_IMSE(boolean fair) {
878	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
879	>	final Condition c = lock.writeLock().newCondition();
880	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
881	>	long startTime = System.nanoTime();
882	>	try {
883	>	await(c, awaitMethod);
884	>	shouldThrow();
885	>	} catch (IllegalMonitorStateException success) {
886	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
887	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
888	>	}
889		}
890
891		/**
892		* Calling signal without holding lock throws IllegalMonitorStateException
893		*/
894	<	public void testSignal_IllegalMonitor() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
895	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
896	>	public void testSignal_IMSE(boolean fair) {
897	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
898		final Condition c = lock.writeLock().newCondition();
899		try {
900		c.signal();
#	Line 787 | Line 905 | public class ReentrantReadWriteLockTest
905		/**
906		* Calling signalAll without holding lock throws IllegalMonitorStateException
907		*/
908	<	public void testSignalAll_IllegalMonitor() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
909	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
910	>	public void testSignalAll_IMSE(boolean fair) {
911	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
912		final Condition c = lock.writeLock().newCondition();
913		try {
914		c.signalAll();
#	Line 799 | Line 919 | public class ReentrantReadWriteLockTest
919		/**
920		* awaitNanos without a signal times out
921		*/
922	<	public void testAwaitNanos_Timeout() throws InterruptedException {
923	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
924	<	final Condition c = lock.writeLock().newCondition();
925	<	lock.writeLock().lock();
926	<	long startTime = System.nanoTime();
927	<	long timeoutMillis = 10;
928	<	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
929	<	long nanosRemaining = c.awaitNanos(timeoutNanos);
930	<	assertTrue(nanosRemaining <= 0);
931	<	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
932	<	lock.writeLock().unlock();
922	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
923	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
924	>	public void testAwaitNanos_Timeout(boolean fair) {
925	>	try {
926	>	final ReentrantReadWriteLock lock =
927	>	new ReentrantReadWriteLock(fair);
928	>	final Condition c = lock.writeLock().newCondition();
929	>	lock.writeLock().lock();
930	>	long startTime = System.nanoTime();
931	>	long timeoutMillis = 10;
932	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
934	>	assertTrue(nanosRemaining <= 0);
935	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
936	>	lock.writeLock().unlock();
937	>	} catch (InterruptedException e) {
938	>	threadUnexpectedException(e);
939	>	}
940		}
941
942		/**
943		* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() throws InterruptedException {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
947	<	final Condition c = lock.writeLock().newCondition();
948	<	lock.writeLock().lock();
949	<	long startTime = System.nanoTime();
950	<	long timeoutMillis = 10;
951	<	assertFalse(c.await(timeoutMillis, MILLISECONDS));
952	<	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
953	<	lock.writeLock().unlock();
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	>	try {
949	>	final ReentrantReadWriteLock lock =
950	>	new ReentrantReadWriteLock(fair);
951	>	final Condition c = lock.writeLock().newCondition();
952	>	lock.writeLock().lock();
953	>	long startTime = System.nanoTime();
954	>	long timeoutMillis = 10;
955	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
956	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957	>	lock.writeLock().unlock();
958	>	} catch (InterruptedException e) {
959	>	threadUnexpectedException(e);
960	>	}
961		}
962
963		/**
964		* awaitUntil without a signal times out
965		*/
966	<	public void testAwaitUntil_Timeout() throws InterruptedException {
967	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
968	<	final Condition c = lock.writeLock().newCondition();
969	<	lock.writeLock().lock();
970	<	java.util.Date d = new java.util.Date();
971	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
972	<	lock.writeLock().unlock();
966	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
967	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
968	>	public void testAwaitUntil_Timeout(boolean fair) {
969	>	try {
970	>	final ReentrantReadWriteLock lock =
971	>	new ReentrantReadWriteLock(fair);
972	>	final Condition c = lock.writeLock().newCondition();
973	>	lock.writeLock().lock();
974	>	long startTime = System.nanoTime();
975	>	long timeoutMillis = 10;
976	>	java.util.Date d = new java.util.Date();
977	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
978	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
979	>	lock.writeLock().unlock();
980	>	} catch (InterruptedException e) {
981	>	threadUnexpectedException(e);
982	>	}
983		}
984
985		/**
986		* await returns when signalled
987		*/
988	<	public void testAwait() throws InterruptedException {
989	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
988	>	public void testAwait()      { testAwait(false); }
989	>	public void testAwait_fair() { testAwait(true); }
990	>	public void testAwait(boolean fair) {
991	>	final PublicReentrantReadWriteLock lock =
992	>	new PublicReentrantReadWriteLock(fair);
993		final Condition c = lock.writeLock().newCondition();
994		final CountDownLatch locked = new CountDownLatch(1);
995		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 853 | Line 1000 | public class ReentrantReadWriteLockTest
1000		lock.writeLock().unlock();
1001		}});
1002
1003	<	locked.await();
1003	>	await(locked);
1004		lock.writeLock().lock();
1005	+	assertHasWaiters(lock, c, t);
1006		c.signal();
1007	+	assertHasNoWaiters(lock, c);
1008		assertTrue(t.isAlive());
1009		lock.writeLock().unlock();
1010		awaitTermination(t);
1011		}
1012
1013		/**
1014	<	* awaitUninterruptibly doesn't abort on interrupt
1014	>	* awaitUninterruptibly is uninterruptible
1015		*/
1016	<	public void testAwaitUninterruptibly() throws InterruptedException {
1017	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1016	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1017	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1018	>	public void testAwaitUninterruptibly(boolean fair) {
1019	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1020		final Condition c = lock.writeLock().newCondition();
1021	<	final CountDownLatch locked = new CountDownLatch(1);
1022	<	final AtomicBoolean canAwake = new AtomicBoolean(false);
1023	<	Thread t = newStartedThread(new CheckedRunnable() {
1021	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1022	>
1023	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1024		public void realRun() {
1025	+	// Interrupt before awaitUninterruptibly
1026		lock.writeLock().lock();
1027	<	locked.countDown();
1027	>	pleaseInterrupt.countDown();
1028	>	Thread.currentThread().interrupt();
1029		c.awaitUninterruptibly();
1030		assertTrue(Thread.interrupted());
1031		lock.writeLock().unlock();
1032		}});
1033
1034	<	locked.await();
1035	<	lock.writeLock().lock();
1036	<	lock.writeLock().unlock();
884	<	t.interrupt();
885	<	t.join(10);
886	<	assertTrue(t.isAlive());
887	<	lock.writeLock().lock();
888	<	c.signal();
889	<	lock.writeLock().unlock();
890	<	awaitTermination(t);
891	<	}
892	<
893	<	/**
894	<	* await is interruptible
895	<	*/
896	<	public void testAwait_Interrupt() throws InterruptedException {
897	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
898	<	final Condition c = lock.writeLock().newCondition();
899	<	final CountDownLatch locked = new CountDownLatch(1);
900	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
901	<	public void realRun() throws InterruptedException {
1034	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1035	>	public void realRun() {
1036	>	// Interrupt during awaitUninterruptibly
1037		lock.writeLock().lock();
1038	<	assertTrue(lock.isWriteLocked());
1039	<	assertTrue(lock.isWriteLockedByCurrentThread());
1040	<	assertHasNoWaiters(lock, c);
1041	<	locked.countDown();
907	<	try {
908	<	c.await();
909	<	} finally {
910	<	assertTrue(lock.isWriteLocked());
911	<	assertTrue(lock.isWriteLockedByCurrentThread());
912	<	assertHasNoWaiters(lock, c);
913	<	lock.writeLock().unlock();
914	<	assertFalse(Thread.interrupted());
915	<	}
1038	>	pleaseInterrupt.countDown();
1039	>	c.awaitUninterruptibly();
1040	>	assertTrue(Thread.interrupted());
1041	>	lock.writeLock().unlock();
1042		}});
1043
1044	<	locked.await();
1045	<	assertHasWaiters(lock, c, t);
1046	<	t.interrupt();
1047	<	awaitTermination(t);
922	<	assertFalse(lock.isWriteLocked());
923	<	}
1044	>	await(pleaseInterrupt);
1045	>	lock.writeLock().lock();
1046	>	lock.writeLock().unlock();
1047	>	t2.interrupt();
1048
1049	<	/**
1050	<	* awaitNanos is interruptible
927	<	*/
928	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
929	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
930	<	final Condition c = lock.writeLock().newCondition();
931	<	final CountDownLatch locked = new CountDownLatch(1);
932	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
933	<	public void realRun() throws InterruptedException {
934	<	lock.writeLock().lock();
935	<	assertTrue(lock.isWriteLocked());
936	<	assertTrue(lock.isWriteLockedByCurrentThread());
937	<	assertHasNoWaiters(lock, c);
938	<	locked.countDown();
939	<	try {
940	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
941	<	} finally {
942	<	assertTrue(lock.isWriteLocked());
943	<	assertTrue(lock.isWriteLockedByCurrentThread());
944	<	assertHasNoWaiters(lock, c);
945	<	lock.writeLock().unlock();
946	<	assertFalse(Thread.interrupted());
947	<	}
948	<	}});
1049	>	assertThreadStaysAlive(t1);
1050	>	assertTrue(t2.isAlive());
1051
1052	<	locked.await();
1053	<	assertHasWaiters(lock, c, t);
1054	<	t.interrupt();
1055	<	awaitTermination(t);
1056	<	assertFalse(lock.isWriteLocked());
1052	>	lock.writeLock().lock();
1053	>	c.signalAll();
1054	>	lock.writeLock().unlock();
1055	>
1056	>	awaitTermination(t1);
1057	>	awaitTermination(t2);
1058		}
1059
1060		/**
1061	<	* awaitUntil is interruptible
1061	>	* await/awaitNanos/awaitUntil is interruptible
1062		*/
1063	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1064	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1063	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1064	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1065	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1066	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1067	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1068	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1069	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1070	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1071	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1072	>	final PublicReentrantReadWriteLock lock =
1073	>	new PublicReentrantReadWriteLock(fair);
1074		final Condition c = lock.writeLock().newCondition();
1075		final CountDownLatch locked = new CountDownLatch(1);
1076		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1077		public void realRun() throws InterruptedException {
1078		lock.writeLock().lock();
1079	<	assertTrue(lock.isWriteLocked());
968	<	assertTrue(lock.isWriteLockedByCurrentThread());
1079	>	assertWriteLockedByMoi(lock);
1080		assertHasNoWaiters(lock, c);
1081		locked.countDown();
971	–	java.util.Date d = new java.util.Date();
1082		try {
1083	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1083	>	await(c, awaitMethod);
1084		} finally {
1085	<	assertTrue(lock.isWriteLocked());
976	<	assertTrue(lock.isWriteLockedByCurrentThread());
1085	>	assertWriteLockedByMoi(lock);
1086		assertHasNoWaiters(lock, c);
1087		lock.writeLock().unlock();
1088		assertFalse(Thread.interrupted());
1089		}
1090		}});
1091
1092	<	locked.await();
1092	>	await(locked);
1093		assertHasWaiters(lock, c, t);
1094		t.interrupt();
1095		awaitTermination(t);
1096	<	assertFalse(lock.isWriteLocked());
1096	>	assertNotWriteLocked(lock);
1097		}
1098
1099		/**
1100		* signalAll wakes up all threads
1101		*/
1102	<	public void testSignalAll() throws InterruptedException {
1103	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1102	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1103	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1104	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1105	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1106	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1107	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1108	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1109	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1110	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1111	>	final PublicReentrantReadWriteLock lock =
1112	>	new PublicReentrantReadWriteLock(fair);
1113		final Condition c = lock.writeLock().newCondition();
1114		final CountDownLatch locked = new CountDownLatch(2);
1115		final Lock writeLock = lock.writeLock();
1116	<	Thread t1 = newStartedThread(new CheckedRunnable() {
1116	>	class Awaiter extends CheckedRunnable {
1117		public void realRun() throws InterruptedException {
1118		writeLock.lock();
1119		locked.countDown();
1120	<	c.await();
1120	>	await(c, awaitMethod);
1121		writeLock.unlock();
1122	<	}});
1122	>	}
1123	>	}
1124
1125	<	Thread t2 = newStartedThread(new CheckedRunnable() {
1126	<	public void realRun() throws InterruptedException {
1008	<	writeLock.lock();
1009	<	locked.countDown();
1010	<	c.await();
1011	<	writeLock.unlock();
1012	<	}});
1125	>	Thread t1 = newStartedThread(new Awaiter());
1126	>	Thread t2 = newStartedThread(new Awaiter());
1127
1128	<	locked.await();
1128	>	await(locked);
1129		writeLock.lock();
1130		assertHasWaiters(lock, c, t1, t2);
1131		c.signalAll();
#	Line 1022 | Line 1136 | public class ReentrantReadWriteLockTest
1136		}
1137
1138		/**
1139	<	* signal wakes up waiting threads in FIFO order.
1139	>	* signal wakes up waiting threads in FIFO order
1140		*/
1141	<	public void testSignalWakesFifo() throws InterruptedException {
1142	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1141	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1142	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1143	>	public void testSignalWakesFifo(boolean fair) {
1144	>	final PublicReentrantReadWriteLock lock =
1145	>	new PublicReentrantReadWriteLock(fair);
1146		final Condition c = lock.writeLock().newCondition();
1147		final CountDownLatch locked1 = new CountDownLatch(1);
1148		final CountDownLatch locked2 = new CountDownLatch(1);
#	Line 1038 | Line 1155 | public class ReentrantReadWriteLockTest
1155		writeLock.unlock();
1156		}});
1157
1158	<	locked1.await();
1158	>	await(locked1);
1159
1160		Thread t2 = newStartedThread(new CheckedRunnable() {
1161		public void realRun() throws InterruptedException {
#	Line 1048 | Line 1165 | public class ReentrantReadWriteLockTest
1165		writeLock.unlock();
1166		}});
1167
1168	<	locked2.await();
1168	>	await(locked2);
1169
1170		writeLock.lock();
1171		assertHasWaiters(lock, c, t1, t2);
#	Line 1067 | Line 1184 | public class ReentrantReadWriteLockTest
1184		}
1185
1186		/**
1187	+	* await after multiple reentrant locking preserves lock count
1188	+	*/
1189	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1190	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1191	+	public void testAwaitLockCount(boolean fair) {
1192	+	final PublicReentrantReadWriteLock lock =
1193	+	new PublicReentrantReadWriteLock(fair);
1194	+	final Condition c = lock.writeLock().newCondition();
1195	+	final CountDownLatch locked = new CountDownLatch(2);
1196	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1197	+	public void realRun() throws InterruptedException {
1198	+	lock.writeLock().lock();
1199	+	assertWriteLockedByMoi(lock);
1200	+	assertEquals(1, lock.writeLock().getHoldCount());
1201	+	locked.countDown();
1202	+	c.await();
1203	+	assertWriteLockedByMoi(lock);
1204	+	assertEquals(1, lock.writeLock().getHoldCount());
1205	+	lock.writeLock().unlock();
1206	+	}});
1207	+
1208	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1209	+	public void realRun() throws InterruptedException {
1210	+	lock.writeLock().lock();
1211	+	lock.writeLock().lock();
1212	+	assertWriteLockedByMoi(lock);
1213	+	assertEquals(2, lock.writeLock().getHoldCount());
1214	+	locked.countDown();
1215	+	c.await();
1216	+	assertWriteLockedByMoi(lock);
1217	+	assertEquals(2, lock.writeLock().getHoldCount());
1218	+	lock.writeLock().unlock();
1219	+	lock.writeLock().unlock();
1220	+	}});
1221	+
1222	+	await(locked);
1223	+	lock.writeLock().lock();
1224	+	assertHasWaiters(lock, c, t1, t2);
1225	+	c.signalAll();
1226	+	assertHasNoWaiters(lock, c);
1227	+	lock.writeLock().unlock();
1228	+	awaitTermination(t1);
1229	+	awaitTermination(t2);
1230	+	}
1231	+
1232	+	/**
1233		* A serialized lock deserializes as unlocked
1234		*/
1235	<	public void testSerialization() throws Exception {
1236	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1237	<	l.readLock().lock();
1238	<	l.readLock().unlock();
1239	<
1240	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1241	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1242	<	out.writeObject(l);
1243	<	out.close();
1244	<
1245	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1246	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1247	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1248	<	r.readLock().lock();
1249	<	r.readLock().unlock();
1235	>	public void testSerialization()      { testSerialization(false); }
1236	>	public void testSerialization_fair() { testSerialization(true); }
1237	>	public void testSerialization(boolean fair) {
1238	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1239	>	lock.writeLock().lock();
1240	>	lock.readLock().lock();
1241	>
1242	>	ReentrantReadWriteLock clone = serialClone(lock);
1243	>	assertEquals(lock.isFair(), clone.isFair());
1244	>	assertTrue(lock.isWriteLocked());
1245	>	assertFalse(clone.isWriteLocked());
1246	>	assertEquals(1, lock.getReadLockCount());
1247	>	assertEquals(0, clone.getReadLockCount());
1248	>	clone.writeLock().lock();
1249	>	clone.readLock().lock();
1250	>	assertTrue(clone.isWriteLocked());
1251	>	assertEquals(1, clone.getReadLockCount());
1252	>	clone.readLock().unlock();
1253	>	clone.writeLock().unlock();
1254	>	assertFalse(clone.isWriteLocked());
1255	>	assertEquals(1, lock.getReadLockCount());
1256	>	assertEquals(0, clone.getReadLockCount());
1257		}
1258
1259		/**
1260		* hasQueuedThreads reports whether there are waiting threads
1261		*/
1262	<	public void testhasQueuedThreads() throws InterruptedException {
1263	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1262	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1263	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1264	>	public void testHasQueuedThreads(boolean fair) {
1265	>	final PublicReentrantReadWriteLock lock =
1266	>	new PublicReentrantReadWriteLock(fair);
1267		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1268		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1269		assertFalse(lock.hasQueuedThreads());
1270		lock.writeLock().lock();
1271		assertFalse(lock.hasQueuedThreads());
1099	–	long startTime = System.nanoTime();
1272		t1.start();
1273		waitForQueuedThread(lock, t1);
1274	+	assertTrue(lock.hasQueuedThreads());
1275		t2.start();
1276		waitForQueuedThread(lock, t2);
1277		assertTrue(lock.hasQueuedThreads());
#	Line 1113 | Line 1286 | public class ReentrantReadWriteLockTest
1286		/**
1287		* hasQueuedThread(null) throws NPE
1288		*/
1289	<	public void testHasQueuedThreadNPE() {
1290	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1289	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1290	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1291	>	public void testHasQueuedThreadNPE(boolean fair) {
1292	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1293		try {
1294	<	sync.hasQueuedThread(null);
1294	>	lock.hasQueuedThread(null);
1295		shouldThrow();
1296		} catch (NullPointerException success) {}
1297		}
1298
1299		/**
1300	<	* hasQueuedThread reports whether a thread is queued.
1300	>	* hasQueuedThread reports whether a thread is queued
1301		*/
1302	<	public void testHasQueuedThread() throws InterruptedException {
1303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1302	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1303	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1304	>	public void testHasQueuedThread(boolean fair) {
1305	>	final PublicReentrantReadWriteLock lock =
1306	>	new PublicReentrantReadWriteLock(fair);
1307		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1308		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1309		assertFalse(lock.hasQueuedThread(t1));
1310		assertFalse(lock.hasQueuedThread(t2));
1311		lock.writeLock().lock();
1134	–	long startTime = System.nanoTime();
1312		t1.start();
1313		waitForQueuedThread(lock, t1);
1314		assertTrue(lock.hasQueuedThread(t1));
#	Line 1153 | Line 1330 | public class ReentrantReadWriteLockTest
1330		/**
1331		* getQueueLength reports number of waiting threads
1332		*/
1333	<	public void testGetQueueLength() throws InterruptedException {
1334	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1333	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1334	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1335	>	public void testGetQueueLength(boolean fair) {
1336	>	final PublicReentrantReadWriteLock lock =
1337	>	new PublicReentrantReadWriteLock(fair);
1338		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1339		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1340		assertEquals(0, lock.getQueueLength());
1341		lock.writeLock().lock();
1162	–	long startTime = System.nanoTime();
1342		t1.start();
1343		waitForQueuedThread(lock, t1);
1344		assertEquals(1, lock.getQueueLength());
#	Line 1177 | Line 1356 | public class ReentrantReadWriteLockTest
1356		/**
1357		* getQueuedThreads includes waiting threads
1358		*/
1359	<	public void testGetQueuedThreads() throws InterruptedException {
1360	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1359	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1360	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1361	>	public void testGetQueuedThreads(boolean fair) {
1362	>	final PublicReentrantReadWriteLock lock =
1363	>	new PublicReentrantReadWriteLock(fair);
1364		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1365		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1366		assertTrue(lock.getQueuedThreads().isEmpty());
1367		lock.writeLock().lock();
1186	–	long startTime = System.nanoTime();
1368		assertTrue(lock.getQueuedThreads().isEmpty());
1369		t1.start();
1370		waitForQueuedThread(lock, t1);
#	Line 1207 | Line 1388 | public class ReentrantReadWriteLockTest
1388		/**
1389		* hasWaiters throws NPE if null
1390		*/
1391	<	public void testHasWaitersNPE() {
1392	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1391	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1392	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1393	>	public void testHasWaitersNPE(boolean fair) {
1394	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1395		try {
1396		lock.hasWaiters(null);
1397		shouldThrow();
#	Line 1218 | Line 1401 | public class ReentrantReadWriteLockTest
1401		/**
1402		* getWaitQueueLength throws NPE if null
1403		*/
1404	<	public void testGetWaitQueueLengthNPE() {
1405	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1404	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1405	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1406	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1407	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1408		try {
1409		lock.getWaitQueueLength(null);
1410		shouldThrow();
#	Line 1229 | Line 1414 | public class ReentrantReadWriteLockTest
1414		/**
1415		* getWaitingThreads throws NPE if null
1416		*/
1417	<	public void testGetWaitingThreadsNPE() {
1418	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1417	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1418	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1419	>	public void testGetWaitingThreadsNPE(boolean fair) {
1420	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1421		try {
1422		lock.getWaitingThreads(null);
1423		shouldThrow();
#	Line 1238 | Line 1425 | public class ReentrantReadWriteLockTest
1425		}
1426
1427		/**
1428	<	* hasWaiters throws IAE if not owned
1428	>	* hasWaiters throws IllegalArgumentException if not owned
1429		*/
1430	<	public void testHasWaitersIAE() {
1431	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1430	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1431	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1432	>	public void testHasWaitersIAE(boolean fair) {
1433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1434		final Condition c = lock.writeLock().newCondition();
1435	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1435	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1436		try {
1437		lock2.hasWaiters(c);
1438		shouldThrow();
#	Line 1251 | Line 1440 | public class ReentrantReadWriteLockTest
1440		}
1441
1442		/**
1443	<	* hasWaiters throws IMSE if not locked
1443	>	* hasWaiters throws IllegalMonitorStateException if not locked
1444		*/
1445	<	public void testHasWaitersIMSE() {
1446	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1445	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1446	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1447	>	public void testHasWaitersIMSE(boolean fair) {
1448	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1449		final Condition c = lock.writeLock().newCondition();
1450		try {
1451		lock.hasWaiters(c);
#	Line 1263 | Line 1454 | public class ReentrantReadWriteLockTest
1454		}
1455
1456		/**
1457	<	* getWaitQueueLength throws IAE if not owned
1457	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1458		*/
1459	<	public void testGetWaitQueueLengthIAE() {
1460	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1459	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1460	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1461	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1462	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1463		final Condition c = lock.writeLock().newCondition();
1464	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1464	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1465		try {
1466		lock2.getWaitQueueLength(c);
1467		shouldThrow();
#	Line 1276 | Line 1469 | public class ReentrantReadWriteLockTest
1469		}
1470
1471		/**
1472	<	* getWaitQueueLength throws IMSE if not locked
1472	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1473		*/
1474	<	public void testGetWaitQueueLengthIMSE() {
1475	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1474	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1475	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1476	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1477	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1478		final Condition c = lock.writeLock().newCondition();
1479		try {
1480		lock.getWaitQueueLength(c);
#	Line 1288 | Line 1483 | public class ReentrantReadWriteLockTest
1483		}
1484
1485		/**
1486	<	* getWaitingThreads throws IAE if not owned
1486	>	* getWaitingThreads throws IllegalArgumentException if not owned
1487		*/
1488	<	public void testGetWaitingThreadsIAE() {
1489	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1488	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1489	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1490	>	public void testGetWaitingThreadsIAE(boolean fair) {
1491	>	final PublicReentrantReadWriteLock lock =
1492	>	new PublicReentrantReadWriteLock(fair);
1493		final Condition c = lock.writeLock().newCondition();
1494	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1494	>	final PublicReentrantReadWriteLock lock2 =
1495	>	new PublicReentrantReadWriteLock(fair);
1496		try {
1497		lock2.getWaitingThreads(c);
1498		shouldThrow();
#	Line 1301 | Line 1500 | public class ReentrantReadWriteLockTest
1500		}
1501
1502		/**
1503	<	* getWaitingThreads throws IMSE if not locked
1503	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1504		*/
1505	<	public void testGetWaitingThreadsIMSE() {
1506	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1505	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1506	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1507	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1508	>	final PublicReentrantReadWriteLock lock =
1509	>	new PublicReentrantReadWriteLock(fair);
1510		final Condition c = lock.writeLock().newCondition();
1511		try {
1512		lock.getWaitingThreads(c);
#	Line 1315 | Line 1517 | public class ReentrantReadWriteLockTest
1517		/**
1518		* hasWaiters returns true when a thread is waiting, else false
1519		*/
1520	<	public void testHasWaiters() throws InterruptedException {
1521	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1520	>	public void testHasWaiters()      { testHasWaiters(false); }
1521	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1522	>	public void testHasWaiters(boolean fair) {
1523	>	final PublicReentrantReadWriteLock lock =
1524	>	new PublicReentrantReadWriteLock(fair);
1525		final Condition c = lock.writeLock().newCondition();
1526		final CountDownLatch locked = new CountDownLatch(1);
1527		Thread t = newStartedThread(new CheckedRunnable() {
1528		public void realRun() throws InterruptedException {
1529		lock.writeLock().lock();
1530	+	assertHasNoWaiters(lock, c);
1531		assertFalse(lock.hasWaiters(c));
1532		locked.countDown();
1327	–	assertEquals(0, lock.getWaitQueueLength(c));
1533		c.await();
1534	+	assertHasNoWaiters(lock, c);
1535	+	assertFalse(lock.hasWaiters(c));
1536		lock.writeLock().unlock();
1537		}});
1538
1539	<	locked.await();
1539	>	await(locked);
1540		lock.writeLock().lock();
1541	+	assertHasWaiters(lock, c, t);
1542		assertTrue(lock.hasWaiters(c));
1335	–	assertEquals(1, lock.getWaitQueueLength(c));
1543		c.signal();
1544		assertHasNoWaiters(lock, c);
1545	+	assertFalse(lock.hasWaiters(c));
1546		lock.writeLock().unlock();
1547		awaitTermination(t);
1548		assertHasNoWaiters(lock, c);
#	Line 1343 | Line 1551 | public class ReentrantReadWriteLockTest
1551		/**
1552		* getWaitQueueLength returns number of waiting threads
1553		*/
1554	<	public void testGetWaitQueueLength() throws InterruptedException {
1555	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1554	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1555	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1556	>	public void testGetWaitQueueLength(boolean fair) {
1557	>	final PublicReentrantReadWriteLock lock =
1558	>	new PublicReentrantReadWriteLock(fair);
1559		final Condition c = lock.writeLock().newCondition();
1560		final CountDownLatch locked = new CountDownLatch(1);
1561		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 1356 | Line 1567 | public class ReentrantReadWriteLockTest
1567		lock.writeLock().unlock();
1568		}});
1569
1570	<	locked.await();
1570	>	await(locked);
1571		lock.writeLock().lock();
1572		assertHasWaiters(lock, c, t);
1573		assertEquals(1, lock.getWaitQueueLength(c));
#	Line 1370 | Line 1581 | public class ReentrantReadWriteLockTest
1581		/**
1582		* getWaitingThreads returns only and all waiting threads
1583		*/
1584	<	public void testGetWaitingThreads() throws InterruptedException {
1585	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1584	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1585	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1586	>	public void testGetWaitingThreads(boolean fair) {
1587	>	final PublicReentrantReadWriteLock lock =
1588	>	new PublicReentrantReadWriteLock(fair);
1589		final Condition c = lock.writeLock().newCondition();
1590		final CountDownLatch locked1 = new CountDownLatch(1);
1591		final CountDownLatch locked2 = new CountDownLatch(1);
#	Line 1398 | Line 1612 | public class ReentrantReadWriteLockTest
1612		lock.writeLock().unlock();
1613
1614		t1.start();
1615	<	locked1.await();
1615	>	await(locked1);
1616		t2.start();
1617	<	locked2.await();
1617	>	await(locked2);
1618
1619		lock.writeLock().lock();
1620		assertTrue(lock.hasWaiters(c));
#	Line 1420 | Line 1634 | public class ReentrantReadWriteLockTest
1634		/**
1635		* toString indicates current lock state
1636		*/
1637	<	public void testToString() {
1638	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1639	<	String us = lock.toString();
1640	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1641	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1642	<	lock.writeLock().lock();
1643	<	String ws = lock.toString();
1644	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1645	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1637	>	public void testToString()      { testToString(false); }
1638	>	public void testToString_fair() { testToString(true); }
1639	>	public void testToString(boolean fair) {
1640	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1641	>	assertTrue(lock.toString().contains("Write locks = 0"));
1642	>	assertTrue(lock.toString().contains("Read locks = 0"));
1643	>	lock.writeLock().lock();
1644	>	assertTrue(lock.toString().contains("Write locks = 1"));
1645	>	assertTrue(lock.toString().contains("Read locks = 0"));
1646		lock.writeLock().unlock();
1647		lock.readLock().lock();
1648		lock.readLock().lock();
1649	<	String rs = lock.toString();
1650	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1437	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1649	>	assertTrue(lock.toString().contains("Write locks = 0"));
1650	>	assertTrue(lock.toString().contains("Read locks = 2"));
1651		}
1652
1653		/**
1654		* readLock.toString indicates current lock state
1655		*/
1656	<	public void testReadLockToString() {
1657	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1658	<	String us = lock.readLock().toString();
1659	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1656	>	public void testReadLockToString()      { testReadLockToString(false); }
1657	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1658	>	public void testReadLockToString(boolean fair) {
1659	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1660	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1661		lock.readLock().lock();
1662		lock.readLock().lock();
1663	<	String rs = lock.readLock().toString();
1450	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664		}
1665
1666		/**
1667		* writeLock.toString indicates current lock state
1668		*/
1669	<	public void testWriteLockToString() {
1670	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1671	<	String us = lock.writeLock().toString();
1672	<	assertTrue(us.indexOf("Unlocked") >= 0);
1669	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1670	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1671	>	public void testWriteLockToString(boolean fair) {
1672	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1673	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1674		lock.writeLock().lock();
1675	<	String ls = lock.writeLock().toString();
1676	<	assertTrue(ls.indexOf("Locked") >= 0);
1675	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1676	>	lock.writeLock().unlock();
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678		}
1679
1680		}

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