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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.48 by jsr166, Mon May 2 00:06:45 2011 UTC vs.
Revision 1.62 by jsr166, Sun May 15 17:30:21 2011 UTC

#	Line 7 | Line 7
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13		import static java.util.concurrent.TimeUnit.MILLISECONDS;
#	Line 32 | Line 33 | public class ReentrantReadWriteLockTest
33		}
34		}
35
35	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
#	Line 50 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	+	public Thread getOwner() {
55	+	return super.getOwner();
56	+	}
57		public Collection<Thread> getQueuedThreads() {
58		return super.getQueuedThreads();
59		}
#	Line 59 | Line 63 | public class ReentrantReadWriteLockTest
63		}
64
65		/**
66	<	* Releases lock, checking that it had a hold count of 1.
66	>	* Releases write lock, checking that it had a hold count of 1.
67		*/
68	<	void releaseLock(ReentrantReadWriteLock.WriteLock lock) {
69	<	assertTrue(lock.isHeldByCurrentThread());
70	<	lock.unlock();
71	<	assertFalse(lock.isHeldByCurrentThread());
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedByMoi(lock);
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* Constructor sets given fairness, and is in unlocked state
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<	public void testConstructor() {
80	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	<	assertFalse(rl.isFair());
82	<	assertFalse(rl.isWriteLocked());
83	<	assertEquals(0, rl.getReadLockCount());
84	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
85	<	assertTrue(r2.isFair());
86	<	assertFalse(r2.isWriteLocked());
87	<	assertEquals(0, r2.getReadLockCount());
82	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
83	<	assertFalse(r3.isFair());
84	<	assertFalse(r3.isWriteLocked());
85	<	assertEquals(0, r3.getReadLockCount());
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new AssertionFailedError("timed out");
84	>	Thread.yield();
85	>	}
86	>	assertTrue(t.isAlive());
87	>	assertTrue(lock.getOwner() != t);
88		}
89
90		/**
91	<	* write-locking and read-locking an unlocked lock succeed
91	>	* Checks that lock is not write-locked.
92	>	*/
93	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	>	assertFalse(lock.isWriteLocked());
95	>	assertFalse(lock.isWriteLockedByCurrentThread());
96	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	>	assertEquals(0, lock.getWriteHoldCount());
98	>	assertEquals(0, lock.writeLock().getHoldCount());
99	>	assertNull(lock.getOwner());
100	>	}
101	>
102	>	/**
103	>	* Checks that lock is write-locked by the given thread.
104		*/
105	<	public void testLock() {
106	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
107	<	rl.writeLock().lock();
108	<	assertTrue(rl.isWriteLocked());
109	<	assertTrue(rl.isWriteLockedByCurrentThread());
110	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
111	<	assertEquals(0, rl.getReadLockCount());
112	<	rl.writeLock().unlock();
113	<	assertFalse(rl.isWriteLocked());
114	<	assertFalse(rl.isWriteLockedByCurrentThread());
115	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
116	<	assertEquals(0, rl.getReadLockCount());
103	<	rl.readLock().lock();
104	<	assertFalse(rl.isWriteLocked());
105	<	assertFalse(rl.isWriteLockedByCurrentThread());
106	<	assertEquals(1, rl.getReadLockCount());
107	<	rl.readLock().unlock();
108	<	assertFalse(rl.isWriteLocked());
109	<	assertFalse(rl.isWriteLockedByCurrentThread());
110	<	assertEquals(0, rl.getReadLockCount());
105	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
106	>	assertTrue(lock.isWriteLocked());
107	>	assertSame(t, lock.getOwner());
108	>	assertEquals(t == Thread.currentThread(),
109	>	lock.isWriteLockedByCurrentThread());
110	>	assertEquals(t == Thread.currentThread(),
111	>	lock.writeLock().isHeldByCurrentThread());
112	>	assertEquals(t == Thread.currentThread(),
113	>	lock.getWriteHoldCount() > 0);
114	>	assertEquals(t == Thread.currentThread(),
115	>	lock.writeLock().getHoldCount() > 0);
116	>	assertEquals(0, lock.getReadLockCount());
117		}
118
119	+	/**
120	+	* Checks that lock is write-locked by the current thread.
121	+	*/
122	+	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
123	+	assertWriteLockedBy(lock, Thread.currentThread());
124	+	}
125
126		/**
127	<	* locking an unlocked fair lock succeeds
128	<	*/
129	<	public void testFairLock() {
130	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
131	<	rl.writeLock().lock();
132	<	assertTrue(rl.isWriteLocked());
133	<	assertTrue(rl.isWriteLockedByCurrentThread());
134	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
135	<	assertEquals(0, rl.getReadLockCount());
136	<	rl.writeLock().unlock();
137	<	assertFalse(rl.isWriteLocked());
138	<	assertFalse(rl.isWriteLockedByCurrentThread());
139	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
140	<	assertEquals(0, rl.getReadLockCount());
141	<	rl.readLock().lock();
142	<	assertFalse(rl.isWriteLocked());
143	<	assertFalse(rl.isWriteLockedByCurrentThread());
144	<	assertEquals(1, rl.getReadLockCount());
145	<	rl.readLock().unlock();
146	<	assertFalse(rl.isWriteLocked());
147	<	assertFalse(rl.isWriteLockedByCurrentThread());
148	<	assertEquals(0, rl.getReadLockCount());
127	>	* Checks that condition c has no waiters.
128	>	*/
129	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131	>	}
132	>
133	>	/**
134	>	* Checks that condition c has exactly the given waiter threads.
135	>	*/
136	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
137	>	Thread... threads) {
138	>	lock.writeLock().lock();
139	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
140	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
141	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
142	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
143	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
144	>	new HashSet<Thread>(Arrays.asList(threads)));
145	>	lock.writeLock().unlock();
146	>	}
147	>
148	>	enum AwaitMethod { await, awaitNanos, awaitUntil };
149	>
150	>	/**
151	>	* Awaits condition using the specified AwaitMethod.
152	>	*/
153	>	void await(Condition c, AwaitMethod awaitMethod)
154	>	throws InterruptedException {
155	>	switch (awaitMethod) {
156	>	case await:
157	>	c.await();
158	>	break;
159	>	case awaitNanos:
160	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
161	>	assertTrue(nanosRemaining > 0);
162	>	break;
163	>	case awaitUntil:
164	>	java.util.Date d = new java.util.Date();
165	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
166	>	break;
167	>	}
168	>	}
169	>
170	>	/**
171	>	* Constructor sets given fairness, and is in unlocked state
172	>	*/
173	>	public void testConstructor() {
174	>	PublicReentrantReadWriteLock lock;
175	>
176	>	lock = new PublicReentrantReadWriteLock();
177	>	assertFalse(lock.isFair());
178	>	assertNotWriteLocked(lock);
179	>	assertEquals(0, lock.getReadLockCount());
180	>
181	>	lock = new PublicReentrantReadWriteLock(true);
182	>	assertTrue(lock.isFair());
183	>	assertNotWriteLocked(lock);
184	>	assertEquals(0, lock.getReadLockCount());
185	>
186	>	lock = new PublicReentrantReadWriteLock(false);
187	>	assertFalse(lock.isFair());
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>	}
191	>
192	>	/**
193	>	* write-locking and read-locking an unlocked lock succeed
194	>	*/
195	>	public void testLock()      { testLock(false); }
196	>	public void testLock_fair() { testLock(true); }
197	>	public void testLock(boolean fair) {
198	>	PublicReentrantReadWriteLock lock =
199	>	new PublicReentrantReadWriteLock(fair);
200	>	assertNotWriteLocked(lock);
201	>	lock.writeLock().lock();
202	>	assertWriteLockedByMoi(lock);
203	>	lock.writeLock().unlock();
204	>	assertNotWriteLocked(lock);
205	>	assertEquals(0, lock.getReadLockCount());
206	>	lock.readLock().lock();
207	>	assertNotWriteLocked(lock);
208	>	assertEquals(1, lock.getReadLockCount());
209	>	lock.readLock().unlock();
210	>	assertNotWriteLocked(lock);
211	>	assertEquals(0, lock.getReadLockCount());
212		}
213
214		/**
215		* getWriteHoldCount returns number of recursive holds
216		*/
217	<	public void testGetWriteHoldCount() {
218	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
217	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
218	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
219	>	public void testGetWriteHoldCount(boolean fair) {
220	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
221		for (int i = 1; i <= SIZE; i++) {
222		lock.writeLock().lock();
223		assertEquals(i,lock.getWriteHoldCount());
#	Line 152 | Line 229 | public class ReentrantReadWriteLockTest
229		}
230
231		/**
232	<	* WriteLock.getHoldCount returns number of recursive holds
232	>	* writelock.getHoldCount returns number of recursive holds
233		*/
234	<	public void testGetHoldCount() {
235	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
234	>	public void testGetHoldCount()      { testGetHoldCount(false); }
235	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
236	>	public void testGetHoldCount(boolean fair) {
237	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
238		for (int i = 1; i <= SIZE; i++) {
239		lock.writeLock().lock();
240		assertEquals(i,lock.writeLock().getHoldCount());
#	Line 169 | Line 248 | public class ReentrantReadWriteLockTest
248		/**
249		* getReadHoldCount returns number of recursive holds
250		*/
251	<	public void testGetReadHoldCount() {
252	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
252	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
253	>	public void testGetReadHoldCount(boolean fair) {
254	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
255		for (int i = 1; i <= SIZE; i++) {
256		lock.readLock().lock();
257		assertEquals(i,lock.getReadHoldCount());
#	Line 181 | Line 262 | public class ReentrantReadWriteLockTest
262		}
263		}
264
184	–
265		/**
266		* write-unlocking an unlocked lock throws IllegalMonitorStateException
267		*/
268	<	public void testUnlock_IllegalMonitorStateException() {
269	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
268	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
269	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
270	>	public void testWriteUnlock_IMSE(boolean fair) {
271	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
272		try {
273	<	rl.writeLock().unlock();
273	>	lock.writeLock().unlock();
274		shouldThrow();
275		} catch (IllegalMonitorStateException success) {}
276		}
277
278	+	/**
279	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
280	+	*/
281	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
282	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
283	+	public void testReadUnlock_IMSE(boolean fair) {
284	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
285	+	try {
286	+	lock.readLock().unlock();
287	+	shouldThrow();
288	+	} catch (IllegalMonitorStateException success) {}
289	+	}
290
291		/**
292		* write-lockInterruptibly is interruptible
293		*/
294	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
295	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
294	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
295	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
296	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
297	>	final PublicReentrantReadWriteLock lock =
298	>	new PublicReentrantReadWriteLock(fair);
299		lock.writeLock().lock();
300		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
301		public void realRun() throws InterruptedException {
302		lock.writeLock().lockInterruptibly();
303		}});
304
305	<	Thread.sleep(SHORT_DELAY_MS);
305	>	waitForQueuedThread(lock, t);
306		t.interrupt();
307	<	t.join();
308	<	releaseLock(lock.writeLock());
307	>	awaitTermination(t);
308	>	releaseWriteLock(lock);
309		}
310
311		/**
312		* timed write-tryLock is interruptible
313		*/
314	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
315	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
314	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
315	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
316	>	public void testWriteTryLock_Interruptible(boolean fair) {
317	>	final PublicReentrantReadWriteLock lock =
318	>	new PublicReentrantReadWriteLock(fair);
319		lock.writeLock().lock();
320		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
321		public void realRun() throws InterruptedException {
322	<	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
322	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
323		}});
324
325	<	Thread.sleep(SHORT_DELAY_MS);
325	>	waitForQueuedThread(lock, t);
326		t.interrupt();
327	<	t.join();
328	<	releaseLock(lock.writeLock());
327	>	awaitTermination(t);
328	>	releaseWriteLock(lock);
329		}
330
331		/**
332		* read-lockInterruptibly is interruptible
333		*/
334	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
335	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
334	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
335	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
336	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
337	>	final PublicReentrantReadWriteLock lock =
338	>	new PublicReentrantReadWriteLock(fair);
339		lock.writeLock().lock();
340		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
341		public void realRun() throws InterruptedException {
342		lock.readLock().lockInterruptibly();
343		}});
344
345	<	Thread.sleep(SHORT_DELAY_MS);
345	>	waitForQueuedThread(lock, t);
346		t.interrupt();
347	<	t.join();
348	<	releaseLock(lock.writeLock());
347	>	awaitTermination(t);
348	>	releaseWriteLock(lock);
349		}
350
351		/**
352		* timed read-tryLock is interruptible
353		*/
354	<	public void testReadTryLock_Interrupted() throws InterruptedException {
355	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
354	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
355	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
356	>	public void testReadTryLock_Interruptible(boolean fair) {
357	>	final PublicReentrantReadWriteLock lock =
358	>	new PublicReentrantReadWriteLock(fair);
359		lock.writeLock().lock();
360		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
361		public void realRun() throws InterruptedException {
362	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
362	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
363		}});
364
365	<	Thread.sleep(SHORT_DELAY_MS);
365	>	waitForQueuedThread(lock, t);
366		t.interrupt();
367	<	t.join();
367	>	awaitTermination(t);
368	>	releaseWriteLock(lock);
369		}
370
371	+	/**
372	+	* write-tryLock on an unlocked lock succeeds
373	+	*/
374	+	public void testWriteTryLock()      { testWriteTryLock(false); }
375	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
376	+	public void testWriteTryLock(boolean fair) {
377	+	final PublicReentrantReadWriteLock lock =
378	+	new PublicReentrantReadWriteLock(fair);
379	+	assertTrue(lock.writeLock().tryLock());
380	+	assertWriteLockedByMoi(lock);
381	+	assertTrue(lock.writeLock().tryLock());
382	+	assertWriteLockedByMoi(lock);
383	+	lock.writeLock().unlock();
384	+	releaseWriteLock(lock);
385	+	}
386
387		/**
388		* write-tryLock fails if locked
389		*/
390	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
391	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
390	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
391	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
392	>	public void testWriteTryLockWhenLocked(boolean fair) {
393	>	final PublicReentrantReadWriteLock lock =
394	>	new PublicReentrantReadWriteLock(fair);
395		lock.writeLock().lock();
396		Thread t = newStartedThread(new CheckedRunnable() {
397		public void realRun() {
398		assertFalse(lock.writeLock().tryLock());
399		}});
400
401	<	t.join();
402	<	lock.writeLock().unlock();
401	>	awaitTermination(t);
402	>	releaseWriteLock(lock);
403		}
404
405		/**
406		* read-tryLock fails if locked
407		*/
408	<	public void testReadTryLockWhenLocked() throws InterruptedException {
409	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
408	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
409	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
410	>	public void testReadTryLockWhenLocked(boolean fair) {
411	>	final PublicReentrantReadWriteLock lock =
412	>	new PublicReentrantReadWriteLock(fair);
413		lock.writeLock().lock();
414		Thread t = newStartedThread(new CheckedRunnable() {
415		public void realRun() {
416		assertFalse(lock.readLock().tryLock());
417		}});
418
419	<	t.join();
420	<	lock.writeLock().unlock();
419	>	awaitTermination(t);
420	>	releaseWriteLock(lock);
421		}
422
423		/**
424		* Multiple threads can hold a read lock when not write-locked
425		*/
426	<	public void testMultipleReadLocks() throws InterruptedException {
427	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
426	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
427	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
428	>	public void testMultipleReadLocks(boolean fair) {
429	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
430		lock.readLock().lock();
431		Thread t = newStartedThread(new CheckedRunnable() {
432	<	public void realRun() {
432	>	public void realRun() throws InterruptedException {
433		assertTrue(lock.readLock().tryLock());
434		lock.readLock().unlock();
435	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
436	+	lock.readLock().unlock();
437	+	lock.readLock().lock();
438	+	lock.readLock().unlock();
439		}});
440
441	<	t.join();
441	>	awaitTermination(t);
442		lock.readLock().unlock();
443		}
444
445		/**
446	<	* A writelock succeeds after reading threads unlock
446	>	* A writelock succeeds only after a reading thread unlocks
447		*/
448	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
449	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
448	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
449	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
450	>	public void testWriteAfterReadLock(boolean fair) {
451	>	final PublicReentrantReadWriteLock lock =
452	>	new PublicReentrantReadWriteLock(fair);
453	>	lock.readLock().lock();
454	>	Thread t = newStartedThread(new CheckedRunnable() {
455	>	public void realRun() {
456	>	assertEquals(1, lock.getReadLockCount());
457	>	lock.writeLock().lock();
458	>	assertEquals(0, lock.getReadLockCount());
459	>	lock.writeLock().unlock();
460	>	}});
461	>	waitForQueuedThread(lock, t);
462	>	assertNotWriteLocked(lock);
463	>	assertEquals(1, lock.getReadLockCount());
464	>	lock.readLock().unlock();
465	>	assertEquals(0, lock.getReadLockCount());
466	>	awaitTermination(t);
467	>	assertNotWriteLocked(lock);
468	>	}
469	>
470	>	/**
471	>	* A writelock succeeds only after reading threads unlock
472	>	*/
473	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
474	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
475	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
476	>	final PublicReentrantReadWriteLock lock =
477	>	new PublicReentrantReadWriteLock(fair);
478	>	lock.readLock().lock();
479		lock.readLock().lock();
480		Thread t1 = newStartedThread(new CheckedRunnable() {
481		public void realRun() {
482		lock.readLock().lock();
483	+	assertEquals(3, lock.getReadLockCount());
484		lock.readLock().unlock();
485		}});
486	+	awaitTermination(t1);
487	+
488		Thread t2 = newStartedThread(new CheckedRunnable() {
489		public void realRun() {
490	+	assertEquals(2, lock.getReadLockCount());
491		lock.writeLock().lock();
492	+	assertEquals(0, lock.getReadLockCount());
493		lock.writeLock().unlock();
494		}});
495	<
496	<	Thread.sleep(SHORT_DELAY_MS);
495	>	waitForQueuedThread(lock, t2);
496	>	assertNotWriteLocked(lock);
497	>	assertEquals(2, lock.getReadLockCount());
498	>	lock.readLock().unlock();
499		lock.readLock().unlock();
500	<	t1.join(MEDIUM_DELAY_MS);
501	<	t2.join(MEDIUM_DELAY_MS);
502	<	assertTrue(!t1.isAlive());
333	<	assertTrue(!t2.isAlive());
500	>	assertEquals(0, lock.getReadLockCount());
501	>	awaitTermination(t2);
502	>	assertNotWriteLocked(lock);
503		}
504
505		/**
506	<	* Readlocks succeed after a writing thread unlocks
506	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
507	>	* will block if there is a waiting writer thread.
508		*/
509	<	public void testReadAfterWriteLock() throws InterruptedException {
510	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
511	<	lock.writeLock().lock();
509	>	public void testReaderWriterReaderFairFifo() {
510	>	final PublicReentrantReadWriteLock lock =
511	>	new PublicReentrantReadWriteLock(true);
512	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
513	>
514	>	lock.readLock().lock();
515		Thread t1 = newStartedThread(new CheckedRunnable() {
516		public void realRun() {
517	<	lock.readLock().lock();
518	<	lock.readLock().unlock();
517	>	assertEquals(1, lock.getReadLockCount());
518	>	lock.writeLock().lock();
519	>	assertEquals(0, lock.getReadLockCount());
520	>	t1GotLock.set(true);
521	>	lock.writeLock().unlock();
522		}});
523	+	waitForQueuedThread(lock, t1);
524	+
525		Thread t2 = newStartedThread(new CheckedRunnable() {
526		public void realRun() {
527	+	assertEquals(1, lock.getReadLockCount());
528		lock.readLock().lock();
529	+	assertEquals(1, lock.getReadLockCount());
530	+	assertTrue(t1GotLock.get());
531		lock.readLock().unlock();
532		}});
533	<
534	<	Thread.sleep(SHORT_DELAY_MS);
535	<	lock.writeLock().unlock();
536	<	t1.join(MEDIUM_DELAY_MS);
356	<	t2.join(MEDIUM_DELAY_MS);
357	<	assertTrue(!t1.isAlive());
358	<	assertTrue(!t2.isAlive());
359	<	}
360	<
361	<	/**
362	<	* Read trylock succeeds if write locked by current thread
363	<	*/
364	<	public void testReadHoldingWriteLock() {
365	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
366	<	lock.writeLock().lock();
367	<	assertTrue(lock.readLock().tryLock());
533	>	waitForQueuedThread(lock, t2);
534	>	assertTrue(t1.isAlive());
535	>	assertNotWriteLocked(lock);
536	>	assertEquals(1, lock.getReadLockCount());
537		lock.readLock().unlock();
538	<	lock.writeLock().unlock();
538	>	awaitTermination(t1);
539	>	awaitTermination(t2);
540	>	assertNotWriteLocked(lock);
541		}
542
543		/**
544	<	* Read lock succeeds if write locked by current thread even if
374	<	* other threads are waiting for readlock
544	>	* Readlocks succeed only after a writing thread unlocks
545		*/
546	<	public void testReadHoldingWriteLock2() throws InterruptedException {
547	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
546	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
547	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
548	>	public void testReadAfterWriteLock(boolean fair) {
549	>	final PublicReentrantReadWriteLock lock =
550	>	new PublicReentrantReadWriteLock(fair);
551		lock.writeLock().lock();
552		Thread t1 = newStartedThread(new CheckedRunnable() {
553		public void realRun() {
#	Line 387 | Line 560 | public class ReentrantReadWriteLockTest
560		lock.readLock().unlock();
561		}});
562
563	<	lock.readLock().lock();
564	<	lock.readLock().unlock();
565	<	Thread.sleep(SHORT_DELAY_MS);
566	<	lock.readLock().lock();
567	<	lock.readLock().unlock();
395	<	lock.writeLock().unlock();
396	<	t1.join(MEDIUM_DELAY_MS);
397	<	t2.join(MEDIUM_DELAY_MS);
398	<	assertTrue(!t1.isAlive());
399	<	assertTrue(!t2.isAlive());
563	>	waitForQueuedThread(lock, t1);
564	>	waitForQueuedThread(lock, t2);
565	>	releaseWriteLock(lock);
566	>	awaitTermination(t1);
567	>	awaitTermination(t2);
568		}
569
570		/**
571	<	* Read lock succeeds if write locked by current thread even if
404	<	* other threads are waiting for writelock
571	>	* Read trylock succeeds if write locked by current thread
572		*/
573	<	public void testReadHoldingWriteLock3() throws InterruptedException {
574	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
573	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
574	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
575	>	public void testReadHoldingWriteLock(boolean fair) {
576	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
577		lock.writeLock().lock();
578	<	Thread t1 = newStartedThread(new CheckedRunnable() {
410	<	public void realRun() {
411	<	lock.writeLock().lock();
412	<	lock.writeLock().unlock();
413	<	}});
414	<	Thread t2 = newStartedThread(new CheckedRunnable() {
415	<	public void realRun() {
416	<	lock.writeLock().lock();
417	<	lock.writeLock().unlock();
418	<	}});
419	<
420	<	lock.readLock().lock();
421	<	lock.readLock().unlock();
422	<	Thread.sleep(SHORT_DELAY_MS);
423	<	lock.readLock().lock();
578	>	assertTrue(lock.readLock().tryLock());
579		lock.readLock().unlock();
580		lock.writeLock().unlock();
426	–	t1.join(MEDIUM_DELAY_MS);
427	–	t2.join(MEDIUM_DELAY_MS);
428	–	assertTrue(!t1.isAlive());
429	–	assertTrue(!t2.isAlive());
581		}
582
432	–
583		/**
584	<	* Write lock succeeds if write locked by current thread even if
435	<	* other threads are waiting for writelock
584	>	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
585		*/
586	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
587	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	<	lock.writeLock().lock();
586	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
587	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
588	>	public void testReadTryLockBarging(boolean fair) {
589	>	final PublicReentrantReadWriteLock lock =
590	>	new PublicReentrantReadWriteLock(fair);
591	>	lock.readLock().lock();
592	>
593		Thread t1 = newStartedThread(new CheckedRunnable() {
594		public void realRun() {
595		lock.writeLock().lock();
596		lock.writeLock().unlock();
597		}});
598	+
599	+	waitForQueuedThread(lock, t1);
600	+
601		Thread t2 = newStartedThread(new CheckedRunnable() {
602		public void realRun() {
603	<	lock.writeLock().lock();
604	<	lock.writeLock().unlock();
603	>	lock.readLock().lock();
604	>	lock.readLock().unlock();
605		}});
606
607	<	lock.writeLock().lock();
608	<	lock.writeLock().unlock();
453	<	Thread.sleep(SHORT_DELAY_MS);
454	<	lock.writeLock().lock();
455	<	lock.writeLock().unlock();
456	<	lock.writeLock().unlock();
457	<	t1.join(MEDIUM_DELAY_MS);
458	<	t2.join(MEDIUM_DELAY_MS);
459	<	assertTrue(!t1.isAlive());
460	<	assertTrue(!t2.isAlive());
461	<	}
607	>	if (fair)
608	>	waitForQueuedThread(lock, t2);
609
610	+	Thread t3 = newStartedThread(new CheckedRunnable() {
611	+	public void realRun() {
612	+	lock.readLock().tryLock();
613	+	lock.readLock().unlock();
614	+	}});
615
616	<	/**
617	<	* Fair Read trylock succeeds if write locked by current thread
618	<	*/
619	<	public void testReadHoldingWriteLockFair() {
468	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
469	<	lock.writeLock().lock();
470	<	assertTrue(lock.readLock().tryLock());
616	>	assertTrue(lock.getReadLockCount() > 0);
617	>	awaitTermination(t3);
618	>	assertTrue(t1.isAlive());
619	>	if (fair) assertTrue(t2.isAlive());
620		lock.readLock().unlock();
621	<	lock.writeLock().unlock();
621	>	awaitTermination(t1);
622	>	awaitTermination(t2);
623		}
624
625		/**
626	<	* Fair Read lock succeeds if write locked by current thread even if
626	>	* Read lock succeeds if write locked by current thread even if
627		* other threads are waiting for readlock
628		*/
629	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
630	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
629	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
630	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
631	>	public void testReadHoldingWriteLock2(boolean fair) {
632	>	final PublicReentrantReadWriteLock lock =
633	>	new PublicReentrantReadWriteLock(fair);
634		lock.writeLock().lock();
635	+	lock.readLock().lock();
636	+	lock.readLock().unlock();
637	+
638		Thread t1 = newStartedThread(new CheckedRunnable() {
639		public void realRun() {
640		lock.readLock().lock();
#	Line 490 | Line 646 | public class ReentrantReadWriteLockTest
646		lock.readLock().unlock();
647		}});
648
649	+	waitForQueuedThread(lock, t1);
650	+	waitForQueuedThread(lock, t2);
651	+	assertWriteLockedByMoi(lock);
652		lock.readLock().lock();
653		lock.readLock().unlock();
654	<	Thread.sleep(SHORT_DELAY_MS);
655	<	lock.readLock().lock();
656	<	lock.readLock().unlock();
498	<	lock.writeLock().unlock();
499	<	t1.join(MEDIUM_DELAY_MS);
500	<	t2.join(MEDIUM_DELAY_MS);
501	<	assertTrue(!t1.isAlive());
502	<	assertTrue(!t2.isAlive());
654	>	releaseWriteLock(lock);
655	>	awaitTermination(t1);
656	>	awaitTermination(t2);
657		}
658
505	–
659		/**
660	<	* Fair Read lock succeeds if write locked by current thread even if
660	>	* Read lock succeeds if write locked by current thread even if
661		* other threads are waiting for writelock
662		*/
663	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
664	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
663	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
664	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
665	>	public void testReadHoldingWriteLock3(boolean fair) {
666	>	final PublicReentrantReadWriteLock lock =
667	>	new PublicReentrantReadWriteLock(fair);
668		lock.writeLock().lock();
669	+	lock.readLock().lock();
670	+	lock.readLock().unlock();
671	+
672		Thread t1 = newStartedThread(new CheckedRunnable() {
673		public void realRun() {
674		lock.writeLock().lock();
#	Line 521 | Line 680 | public class ReentrantReadWriteLockTest
680		lock.writeLock().unlock();
681		}});
682
683	+	waitForQueuedThread(lock, t1);
684	+	waitForQueuedThread(lock, t2);
685	+	assertWriteLockedByMoi(lock);
686		lock.readLock().lock();
687		lock.readLock().unlock();
688	<	Thread.sleep(SHORT_DELAY_MS);
527	<	lock.readLock().lock();
528	<	lock.readLock().unlock();
688	>	assertWriteLockedByMoi(lock);
689		lock.writeLock().unlock();
690	<	t1.join(MEDIUM_DELAY_MS);
691	<	t2.join(MEDIUM_DELAY_MS);
532	<	assertTrue(!t1.isAlive());
533	<	assertTrue(!t2.isAlive());
690	>	awaitTermination(t1);
691	>	awaitTermination(t2);
692		}
693
536	–
694		/**
695	<	* Fair Write lock succeeds if write locked by current thread even if
695	>	* Write lock succeeds if write locked by current thread even if
696		* other threads are waiting for writelock
697		*/
698	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
699	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
698	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
699	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
700	>	public void testWriteHoldingWriteLock4(boolean fair) {
701	>	final PublicReentrantReadWriteLock lock =
702	>	new PublicReentrantReadWriteLock(fair);
703		lock.writeLock().lock();
704	+	lock.writeLock().lock();
705	+	lock.writeLock().unlock();
706	+
707		Thread t1 = newStartedThread(new CheckedRunnable() {
708		public void realRun() {
709		lock.writeLock().lock();
#	Line 552 | Line 715 | public class ReentrantReadWriteLockTest
715		lock.writeLock().unlock();
716		}});
717
718	<	Thread.sleep(SHORT_DELAY_MS);
719	<	assertTrue(lock.isWriteLockedByCurrentThread());
718	>	waitForQueuedThread(lock, t1);
719	>	waitForQueuedThread(lock, t2);
720	>	assertWriteLockedByMoi(lock);
721		assertEquals(1, lock.getWriteHoldCount());
722		lock.writeLock().lock();
723	+	assertWriteLockedByMoi(lock);
724		assertEquals(2, lock.getWriteHoldCount());
725		lock.writeLock().unlock();
726	<	lock.writeLock().lock();
727	<	lock.writeLock().unlock();
726	>	assertWriteLockedByMoi(lock);
727	>	assertEquals(1, lock.getWriteHoldCount());
728		lock.writeLock().unlock();
729	<	t1.join(MEDIUM_DELAY_MS);
730	<	t2.join(MEDIUM_DELAY_MS);
566	<	assertTrue(!t1.isAlive());
567	<	assertTrue(!t2.isAlive());
729	>	awaitTermination(t1);
730	>	awaitTermination(t2);
731		}
732
570	–
733		/**
734		* Read tryLock succeeds if readlocked but not writelocked
735		*/
736	<	public void testTryLockWhenReadLocked() throws InterruptedException {
737	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
736	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
737	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
738	>	public void testTryLockWhenReadLocked(boolean fair) {
739	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
740		lock.readLock().lock();
741		Thread t = newStartedThread(new CheckedRunnable() {
742		public void realRun() {
#	Line 580 | Line 744 | public class ReentrantReadWriteLockTest
744		lock.readLock().unlock();
745		}});
746
747	<	t.join();
747	>	awaitTermination(t);
748		lock.readLock().unlock();
749		}
750
751		/**
752		* write tryLock fails when readlocked
753		*/
754	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
755	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
755	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
756	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
757	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
758		lock.readLock().lock();
759		Thread t = newStartedThread(new CheckedRunnable() {
760		public void realRun() {
761		assertFalse(lock.writeLock().tryLock());
762		}});
763
764	<	t.join();
764	>	awaitTermination(t);
765		lock.readLock().unlock();
766		}
767
602	–
603	–	/**
604	–	* Fair Read tryLock succeeds if readlocked but not writelocked
605	–	*/
606	–	public void testTryLockWhenReadLockedFair() throws InterruptedException {
607	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
608	–	lock.readLock().lock();
609	–	Thread t = newStartedThread(new CheckedRunnable() {
610	–	public void realRun() {
611	–	assertTrue(lock.readLock().tryLock());
612	–	lock.readLock().unlock();
613	–	}});
614	–
615	–	t.join();
616	–	lock.readLock().unlock();
617	–	}
618	–
619	–
620	–
621	–	/**
622	–	* Fair write tryLock fails when readlocked
623	–	*/
624	–	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
625	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
626	–	lock.readLock().lock();
627	–	Thread t = newStartedThread(new CheckedRunnable() {
628	–	public void realRun() {
629	–	assertFalse(lock.writeLock().tryLock());
630	–	}});
631	–
632	–	t.join();
633	–	lock.readLock().unlock();
634	–	}
635	–
636	–
637	–
768		/**
769		* write timed tryLock times out if locked
770		*/
771	<	public void testWriteTryLock_Timeout() throws InterruptedException {
772	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
771	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
772	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
773	>	public void testWriteTryLock_Timeout(boolean fair) {
774	>	final PublicReentrantReadWriteLock lock =
775	>	new PublicReentrantReadWriteLock(fair);
776		lock.writeLock().lock();
777		Thread t = newStartedThread(new CheckedRunnable() {
778		public void realRun() throws InterruptedException {
779	<	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
779	>	long startTime = System.nanoTime();
780	>	long timeoutMillis = 10;
781	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
782	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
783		}});
784
785	<	t.join();
786	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
651	<	lock.writeLock().unlock();
785	>	awaitTermination(t);
786	>	releaseWriteLock(lock);
787		}
788
789		/**
790		* read timed tryLock times out if write-locked
791		*/
792	<	public void testReadTryLock_Timeout() throws InterruptedException {
793	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
792	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
793	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
794	>	public void testReadTryLock_Timeout(boolean fair) {
795	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
796		lock.writeLock().lock();
797		Thread t = newStartedThread(new CheckedRunnable() {
798		public void realRun() throws InterruptedException {
799	<	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
799	>	long startTime = System.nanoTime();
800	>	long timeoutMillis = 10;
801	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
802	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
803		}});
804
805	<	t.join();
805	>	awaitTermination(t);
806		assertTrue(lock.writeLock().isHeldByCurrentThread());
807		lock.writeLock().unlock();
808		}
809
670	–
810		/**
811	<	* write lockInterruptibly succeeds if lock free else is interruptible
811	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
812		*/
813	<	public void testWriteLockInterruptibly() throws InterruptedException {
814	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
815	<	lock.writeLock().lockInterruptibly();
813	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
814	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
815	>	public void testWriteLockInterruptibly(boolean fair) {
816	>	final PublicReentrantReadWriteLock lock =
817	>	new PublicReentrantReadWriteLock(fair);
818	>	try {
819	>	lock.writeLock().lockInterruptibly();
820	>	} catch (InterruptedException ie) {
821	>	threadUnexpectedException(ie);
822	>	}
823		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
824		public void realRun() throws InterruptedException {
825		lock.writeLock().lockInterruptibly();
826		}});
827
828	<	Thread.sleep(SHORT_DELAY_MS);
828	>	waitForQueuedThread(lock, t);
829		t.interrupt();
830	<	Thread.sleep(SHORT_DELAY_MS);
831	<	t.join();
832	<	lock.writeLock().unlock();
830	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
831	>	awaitTermination(t);
832	>	releaseWriteLock(lock);
833		}
834
835		/**
836		* read lockInterruptibly succeeds if lock free else is interruptible
837		*/
838	<	public void testReadLockInterruptibly() throws InterruptedException {
839	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840	<	lock.writeLock().lockInterruptibly();
838	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
839	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
840	>	public void testReadLockInterruptibly(boolean fair) {
841	>	final PublicReentrantReadWriteLock lock =
842	>	new PublicReentrantReadWriteLock(fair);
843	>	try {
844	>	lock.readLock().lockInterruptibly();
845	>	lock.readLock().unlock();
846	>	lock.writeLock().lockInterruptibly();
847	>	} catch (InterruptedException ie) {
848	>	threadUnexpectedException(ie);
849	>	}
850		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
851		public void realRun() throws InterruptedException {
852		lock.readLock().lockInterruptibly();
853		}});
854
855	<	Thread.sleep(SHORT_DELAY_MS);
855	>	waitForQueuedThread(lock, t);
856		t.interrupt();
857	<	t.join();
858	<	lock.writeLock().unlock();
857	>	awaitTermination(t);
858	>	releaseWriteLock(lock);
859		}
860
861		/**
862		* Calling await without holding lock throws IllegalMonitorStateException
863		*/
864	<	public void testAwait_IllegalMonitor() throws InterruptedException {
865	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
864	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
865	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
866	>	public void testAwait_IMSE(boolean fair) {
867	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
868		final Condition c = lock.writeLock().newCondition();
869	+	long startTime = System.nanoTime();
870		try {
871	<	c.await();
872	<	shouldThrow();
873	<	} catch (IllegalMonitorStateException success) {}
871	>	try {
872	>	c.await();
873	>	shouldThrow();
874	>	} catch (IllegalMonitorStateException success) {}
875	>	try {
876	>	c.await(LONG_DELAY_MS, MILLISECONDS);
877	>	shouldThrow();
878	>	} catch (IllegalMonitorStateException success) {}
879	>	try {
880	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
881	>	shouldThrow();
882	>	} catch (IllegalMonitorStateException success) {}
883	>	try {
884	>	c.awaitUninterruptibly();
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {}
887	>	} catch (InterruptedException ie) {
888	>	threadUnexpectedException(ie);
889	>	}
890	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
891		}
892
893		/**
894		* Calling signal without holding lock throws IllegalMonitorStateException
895		*/
896	<	public void testSignal_IllegalMonitor() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
896	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
897	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
898	>	public void testSignal_IMSE(boolean fair) {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
900		final Condition c = lock.writeLock().newCondition();
901		try {
902		c.signal();
#	Line 728 | Line 905 | public class ReentrantReadWriteLockTest
905		}
906
907		/**
908	<	* awaitNanos without a signal times out
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909		*/
910	<	public void testAwaitNanos_Timeout() throws InterruptedException {
911	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
910	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
911	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
912	>	public void testSignalAll_IMSE(boolean fair) {
913	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
914		final Condition c = lock.writeLock().newCondition();
915	<
916	<	lock.writeLock().lock();
917	<	long t = c.awaitNanos(100);
918	<	assertTrue(t <= 0);
740	<	lock.writeLock().unlock();
915	>	try {
916	>	c.signalAll();
917	>	shouldThrow();
918	>	} catch (IllegalMonitorStateException success) {}
919		}
920
921	+	/**
922	+	* awaitNanos without a signal times out
923	+	*/
924	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
925	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
926	+	public void testAwaitNanos_Timeout(boolean fair) {
927	+	try {
928	+	final ReentrantReadWriteLock lock =
929	+	new ReentrantReadWriteLock(fair);
930	+	final Condition c = lock.writeLock().newCondition();
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);
937	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
938	+	lock.writeLock().unlock();
939	+	} catch (InterruptedException e) {
940	+	threadUnexpectedException(e);
941	+	}
942	+	}
943
944		/**
945		* timed await without a signal times out
946		*/
947	<	public void testAwait_Timeout() throws InterruptedException {
948	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
949	<	final Condition c = lock.writeLock().newCondition();
950	<	lock.writeLock().lock();
951	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
952	<	lock.writeLock().unlock();
947	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
948	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
949	>	public void testAwait_Timeout(boolean fair) {
950	>	try {
951	>	final ReentrantReadWriteLock lock =
952	>	new ReentrantReadWriteLock(fair);
953	>	final Condition c = lock.writeLock().newCondition();
954	>	lock.writeLock().lock();
955	>	long startTime = System.nanoTime();
956	>	long timeoutMillis = 10;
957	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
958	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
959	>	lock.writeLock().unlock();
960	>	} catch (InterruptedException e) {
961	>	threadUnexpectedException(e);
962	>	}
963		}
964
965		/**
966		* awaitUntil without a signal times out
967		*/
968	<	public void testAwaitUntil_Timeout() throws InterruptedException {
969	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
970	<	final Condition c = lock.writeLock().newCondition();
971	<	lock.writeLock().lock();
972	<	java.util.Date d = new java.util.Date();
973	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
974	<	lock.writeLock().unlock();
968	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
969	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
970	>	public void testAwaitUntil_Timeout(boolean fair) {
971	>	try {
972	>	final ReentrantReadWriteLock lock =
973	>	new ReentrantReadWriteLock(fair);
974	>	final Condition c = lock.writeLock().newCondition();
975	>	lock.writeLock().lock();
976	>	long startTime = System.nanoTime();
977	>	long timeoutMillis = 10;
978	>	java.util.Date d = new java.util.Date();
979	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
980	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
981	>	lock.writeLock().unlock();
982	>	} catch (InterruptedException e) {
983	>	threadUnexpectedException(e);
984	>	}
985		}
986
987		/**
988		* await returns when signalled
989		*/
990	<	public void testAwait() throws InterruptedException {
991	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
990	>	public void testAwait()      { testAwait(false); }
991	>	public void testAwait_fair() { testAwait(true); }
992	>	public void testAwait(boolean fair) {
993	>	final PublicReentrantReadWriteLock lock =
994	>	new PublicReentrantReadWriteLock(fair);
995		final Condition c = lock.writeLock().newCondition();
996	+	final CountDownLatch locked = new CountDownLatch(1);
997		Thread t = newStartedThread(new CheckedRunnable() {
998		public void realRun() throws InterruptedException {
999		lock.writeLock().lock();
1000	+	locked.countDown();
1001		c.await();
1002		lock.writeLock().unlock();
1003		}});
1004
1005	<	Thread.sleep(SHORT_DELAY_MS);
1005	>	await(locked);
1006		lock.writeLock().lock();
1007	+	assertHasWaiters(lock, c, t);
1008		c.signal();
1009	+	assertHasNoWaiters(lock, c);
1010	+	assertTrue(t.isAlive());
1011		lock.writeLock().unlock();
1012	<	t.join(SHORT_DELAY_MS);
785	<	assertFalse(t.isAlive());
786	<	}
787	<
788	<	/** A helper class for uninterruptible wait tests */
789	<	class UninterruptableThread extends Thread {
790	<	private Lock lock;
791	<	private Condition c;
792	<
793	<	public volatile boolean canAwake = false;
794	<	public volatile boolean interrupted = false;
795	<	public volatile boolean lockStarted = false;
796	<
797	<	public UninterruptableThread(Lock lock, Condition c) {
798	<	this.lock = lock;
799	<	this.c = c;
800	<	}
801	<
802	<	public synchronized void run() {
803	<	lock.lock();
804	<	lockStarted = true;
805	<
806	<	while (!canAwake) {
807	<	c.awaitUninterruptibly();
808	<	}
809	<
810	<	interrupted = isInterrupted();
811	<	lock.unlock();
812	<	}
1012	>	awaitTermination(t);
1013		}
1014
1015		/**
1016		* awaitUninterruptibly doesn't abort on interrupt
1017		*/
1018	<	public void testAwaitUninterruptibly() throws InterruptedException {
1019	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1018	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1019	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1020	>	public void testAwaitUninterruptibly(boolean fair) {
1021	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1022		final Condition c = lock.writeLock().newCondition();
1023	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1024	<
1025	<	thread.start();
1026	<
1027	<	while (!thread.lockStarted) {
1028	<	Thread.sleep(100);
1029	<	}
1023	>	final CountDownLatch locked = new CountDownLatch(1);
1024	>	Thread t = newStartedThread(new CheckedRunnable() {
1025	>	public void realRun() {
1026	>	lock.writeLock().lock();
1027	>	locked.countDown();
1028	>	c.awaitUninterruptibly();
1029	>	assertTrue(Thread.interrupted());
1030	>	lock.writeLock().unlock();
1031	>	}});
1032
1033	+	await(locked);
1034		lock.writeLock().lock();
1035	<	try {
1036	<	thread.interrupt();
1037	<	thread.canAwake = true;
1038	<	c.signal();
1039	<	} finally {
1040	<	lock.writeLock().unlock();
1041	<	}
1042	<
838	<	thread.join();
839	<	assertTrue(thread.interrupted);
840	<	assertFalse(thread.isAlive());
1035	>	lock.writeLock().unlock();
1036	>	t.interrupt();
1037	>	long timeoutMillis = 10;
1038	>	assertThreadStaysAlive(t, timeoutMillis);
1039	>	lock.writeLock().lock();
1040	>	c.signal();
1041	>	lock.writeLock().unlock();
1042	>	awaitTermination(t);
1043		}
1044
1045		/**
1046	<	* await is interruptible
1046	>	* await/awaitNanos/awaitUntil is interruptible
1047		*/
1048	<	public void testAwait_Interrupt() throws InterruptedException {
1049	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1048	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1049	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1050	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1051	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1052	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1053	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1054	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1055	>	final PublicReentrantReadWriteLock lock =
1056	>	new PublicReentrantReadWriteLock(fair);
1057		final Condition c = lock.writeLock().newCondition();
1058	+	final CountDownLatch locked = new CountDownLatch(1);
1059		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1060		public void realRun() throws InterruptedException {
1061		lock.writeLock().lock();
1062	<	c.await();
1063	<	lock.writeLock().unlock();
1062	>	assertWriteLockedByMoi(lock);
1063	>	assertHasNoWaiters(lock, c);
1064	>	locked.countDown();
1065	>	try {
1066	>	await(c, awaitMethod);
1067	>	} finally {
1068	>	assertWriteLockedByMoi(lock);
1069	>	assertHasNoWaiters(lock, c);
1070	>	lock.writeLock().unlock();
1071	>	assertFalse(Thread.interrupted());
1072	>	}
1073		}});
1074
1075	<	Thread.sleep(SHORT_DELAY_MS);
1075	>	await(locked);
1076	>	assertHasWaiters(lock, c, t);
1077		t.interrupt();
1078	<	t.join(SHORT_DELAY_MS);
1079	<	assertFalse(t.isAlive());
1078	>	awaitTermination(t);
1079	>	assertNotWriteLocked(lock);
1080		}
1081
1082		/**
1083	<	* awaitNanos is interruptible
1083	>	* signalAll wakes up all threads
1084		*/
1085	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1086	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1085	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1086	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1087	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1088	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1089	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1090	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1091	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1092	>	final PublicReentrantReadWriteLock lock =
1093	>	new PublicReentrantReadWriteLock(fair);
1094		final Condition c = lock.writeLock().newCondition();
1095	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1095	>	final CountDownLatch locked = new CountDownLatch(2);
1096	>	final Lock writeLock = lock.writeLock();
1097	>	class Awaiter extends CheckedRunnable {
1098		public void realRun() throws InterruptedException {
1099	<	lock.writeLock().lock();
1100	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1101	<	lock.writeLock().unlock();
1102	<	}});
1099	>	writeLock.lock();
1100	>	locked.countDown();
1101	>	await(c, awaitMethod);
1102	>	writeLock.unlock();
1103	>	}
1104	>	}
1105
1106	<	Thread.sleep(SHORT_DELAY_MS);
1107	<	t.interrupt();
1108	<	t.join(SHORT_DELAY_MS);
1109	<	assertFalse(t.isAlive());
1106	>	Thread t1 = newStartedThread(new Awaiter());
1107	>	Thread t2 = newStartedThread(new Awaiter());
1108	>
1109	>	await(locked);
1110	>	writeLock.lock();
1111	>	assertHasWaiters(lock, c, t1, t2);
1112	>	c.signalAll();
1113	>	assertHasNoWaiters(lock, c);
1114	>	writeLock.unlock();
1115	>	awaitTermination(t1);
1116	>	awaitTermination(t2);
1117		}
1118
1119		/**
1120	<	* awaitUntil is interruptible
1120	>	* signal wakes up waiting threads in FIFO order.
1121		*/
1122	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1123	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1122	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1123	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1124	>	public void testSignalWakesFifo(boolean fair) {
1125	>	final PublicReentrantReadWriteLock lock =
1126	>	new PublicReentrantReadWriteLock(fair);
1127		final Condition c = lock.writeLock().newCondition();
1128	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1128	>	final CountDownLatch locked1 = new CountDownLatch(1);
1129	>	final CountDownLatch locked2 = new CountDownLatch(1);
1130	>	final Lock writeLock = lock.writeLock();
1131	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1132		public void realRun() throws InterruptedException {
1133	<	lock.writeLock().lock();
1134	<	java.util.Date d = new java.util.Date();
1135	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1136	<	lock.writeLock().unlock();
1133	>	writeLock.lock();
1134	>	locked1.countDown();
1135	>	c.await();
1136	>	writeLock.unlock();
1137		}});
1138
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	t.interrupt();
1141	<	t.join(SHORT_DELAY_MS);
1142	<	assertFalse(t.isAlive());
1139	>	await(locked1);
1140	>
1141	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1142	>	public void realRun() throws InterruptedException {
1143	>	writeLock.lock();
1144	>	locked2.countDown();
1145	>	c.await();
1146	>	writeLock.unlock();
1147	>	}});
1148	>
1149	>	await(locked2);
1150	>
1151	>	writeLock.lock();
1152	>	assertHasWaiters(lock, c, t1, t2);
1153	>	assertFalse(lock.hasQueuedThreads());
1154	>	c.signal();
1155	>	assertHasWaiters(lock, c, t2);
1156	>	assertTrue(lock.hasQueuedThread(t1));
1157	>	assertFalse(lock.hasQueuedThread(t2));
1158	>	c.signal();
1159	>	assertHasNoWaiters(lock, c);
1160	>	assertTrue(lock.hasQueuedThread(t1));
1161	>	assertTrue(lock.hasQueuedThread(t2));
1162	>	writeLock.unlock();
1163	>	awaitTermination(t1);
1164	>	awaitTermination(t2);
1165		}
1166
1167		/**
1168	<	* signalAll wakes up all threads
1169	<	*/
1170	<	public void testSignalAll() throws InterruptedException {
1171	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1168	>	* await after multiple reentrant locking preserves lock count
1169	>	*/
1170	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1171	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1172	>	public void testAwaitLockCount(boolean fair) {
1173	>	final PublicReentrantReadWriteLock lock =
1174	>	new PublicReentrantReadWriteLock(fair);
1175		final Condition c = lock.writeLock().newCondition();
1176	+	final CountDownLatch locked = new CountDownLatch(2);
1177		Thread t1 = newStartedThread(new CheckedRunnable() {
1178		public void realRun() throws InterruptedException {
1179		lock.writeLock().lock();
1180	+	assertWriteLockedByMoi(lock);
1181	+	assertEquals(1, lock.writeLock().getHoldCount());
1182	+	locked.countDown();
1183		c.await();
1184	+	assertWriteLockedByMoi(lock);
1185	+	assertEquals(1, lock.writeLock().getHoldCount());
1186		lock.writeLock().unlock();
1187		}});
1188
1189		Thread t2 = newStartedThread(new CheckedRunnable() {
1190		public void realRun() throws InterruptedException {
1191		lock.writeLock().lock();
1192	+	lock.writeLock().lock();
1193	+	assertWriteLockedByMoi(lock);
1194	+	assertEquals(2, lock.writeLock().getHoldCount());
1195	+	locked.countDown();
1196		c.await();
1197	+	assertWriteLockedByMoi(lock);
1198	+	assertEquals(2, lock.writeLock().getHoldCount());
1199	+	lock.writeLock().unlock();
1200		lock.writeLock().unlock();
1201		}});
1202
1203	<	Thread.sleep(SHORT_DELAY_MS);
1203	>	await(locked);
1204		lock.writeLock().lock();
1205	+	assertHasWaiters(lock, c, t1, t2);
1206		c.signalAll();
1207	+	assertHasNoWaiters(lock, c);
1208		lock.writeLock().unlock();
1209	<	t1.join(SHORT_DELAY_MS);
1210	<	t2.join(SHORT_DELAY_MS);
927	<	assertFalse(t1.isAlive());
928	<	assertFalse(t2.isAlive());
1209	>	awaitTermination(t1);
1210	>	awaitTermination(t2);
1211		}
1212
1213		/**
1214		* A serialized lock deserializes as unlocked
1215		*/
1216	<	public void testSerialization() throws Exception {
1217	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1218	<	l.readLock().lock();
1219	<	l.readLock().unlock();
1220	<
1221	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1222	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1223	<	out.writeObject(l);
1224	<	out.close();
1225	<
1226	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1227	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1228	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1229	<	r.readLock().lock();
1230	<	r.readLock().unlock();
1216	>	public void testSerialization()      { testSerialization(false); }
1217	>	public void testSerialization_fair() { testSerialization(true); }
1218	>	public void testSerialization(boolean fair) {
1219	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1220	>	lock.writeLock().lock();
1221	>	lock.readLock().lock();
1222	>
1223	>	ReentrantReadWriteLock clone = serialClone(lock);
1224	>	assertEquals(lock.isFair(), clone.isFair());
1225	>	assertTrue(lock.isWriteLocked());
1226	>	assertFalse(clone.isWriteLocked());
1227	>	assertEquals(1, lock.getReadLockCount());
1228	>	assertEquals(0, clone.getReadLockCount());
1229	>	clone.writeLock().lock();
1230	>	clone.readLock().lock();
1231	>	assertTrue(clone.isWriteLocked());
1232	>	assertEquals(1, clone.getReadLockCount());
1233	>	clone.readLock().unlock();
1234	>	clone.writeLock().unlock();
1235	>	assertFalse(clone.isWriteLocked());
1236	>	assertEquals(1, lock.getReadLockCount());
1237	>	assertEquals(0, clone.getReadLockCount());
1238		}
1239
1240		/**
1241		* hasQueuedThreads reports whether there are waiting threads
1242		*/
1243	<	public void testhasQueuedThreads() throws InterruptedException {
1244	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1243	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1244	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1245	>	public void testHasQueuedThreads(boolean fair) {
1246	>	final PublicReentrantReadWriteLock lock =
1247	>	new PublicReentrantReadWriteLock(fair);
1248		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1249		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1250		assertFalse(lock.hasQueuedThreads());
1251		lock.writeLock().lock();
1252	+	assertFalse(lock.hasQueuedThreads());
1253		t1.start();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1254	>	waitForQueuedThread(lock, t1);
1255		assertTrue(lock.hasQueuedThreads());
1256		t2.start();
1257	<	Thread.sleep(SHORT_DELAY_MS);
1257	>	waitForQueuedThread(lock, t2);
1258		assertTrue(lock.hasQueuedThreads());
1259		t1.interrupt();
1260	<	Thread.sleep(SHORT_DELAY_MS);
1260	>	awaitTermination(t1);
1261		assertTrue(lock.hasQueuedThreads());
1262		lock.writeLock().unlock();
1263	<	Thread.sleep(SHORT_DELAY_MS);
1263	>	awaitTermination(t2);
1264		assertFalse(lock.hasQueuedThreads());
972	–	t1.join();
973	–	t2.join();
1265		}
1266
1267		/**
1268		* hasQueuedThread(null) throws NPE
1269		*/
1270	<	public void testHasQueuedThreadNPE() {
1271	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1270	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1271	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1272	>	public void testHasQueuedThreadNPE(boolean fair) {
1273	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1274		try {
1275	<	sync.hasQueuedThread(null);
1275	>	lock.hasQueuedThread(null);
1276		shouldThrow();
1277		} catch (NullPointerException success) {}
1278		}
#	Line 987 | Line 1280 | public class ReentrantReadWriteLockTest
1280		/**
1281		* hasQueuedThread reports whether a thread is queued.
1282		*/
1283	<	public void testHasQueuedThread() throws InterruptedException {
1284	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1285	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1286	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1287	<	assertFalse(sync.hasQueuedThread(t1));
1288	<	assertFalse(sync.hasQueuedThread(t2));
1289	<	sync.writeLock().lock();
1283	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1284	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1285	>	public void testHasQueuedThread(boolean fair) {
1286	>	final PublicReentrantReadWriteLock lock =
1287	>	new PublicReentrantReadWriteLock(fair);
1288	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1289	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1290	>	assertFalse(lock.hasQueuedThread(t1));
1291	>	assertFalse(lock.hasQueuedThread(t2));
1292	>	lock.writeLock().lock();
1293		t1.start();
1294	<	Thread.sleep(SHORT_DELAY_MS);
1295	<	assertTrue(sync.hasQueuedThread(t1));
1294	>	waitForQueuedThread(lock, t1);
1295	>	assertTrue(lock.hasQueuedThread(t1));
1296	>	assertFalse(lock.hasQueuedThread(t2));
1297		t2.start();
1298	<	Thread.sleep(SHORT_DELAY_MS);
1299	<	assertTrue(sync.hasQueuedThread(t1));
1300	<	assertTrue(sync.hasQueuedThread(t2));
1298	>	waitForQueuedThread(lock, t2);
1299	>	assertTrue(lock.hasQueuedThread(t1));
1300	>	assertTrue(lock.hasQueuedThread(t2));
1301		t1.interrupt();
1302	<	Thread.sleep(SHORT_DELAY_MS);
1303	<	assertFalse(sync.hasQueuedThread(t1));
1304	<	assertTrue(sync.hasQueuedThread(t2));
1305	<	sync.writeLock().unlock();
1306	<	Thread.sleep(SHORT_DELAY_MS);
1307	<	assertFalse(sync.hasQueuedThread(t1));
1308	<	Thread.sleep(SHORT_DELAY_MS);
1012	<	assertFalse(sync.hasQueuedThread(t2));
1013	<	t1.join();
1014	<	t2.join();
1302	>	awaitTermination(t1);
1303	>	assertFalse(lock.hasQueuedThread(t1));
1304	>	assertTrue(lock.hasQueuedThread(t2));
1305	>	lock.writeLock().unlock();
1306	>	awaitTermination(t2);
1307	>	assertFalse(lock.hasQueuedThread(t1));
1308	>	assertFalse(lock.hasQueuedThread(t2));
1309		}
1310
1017	–
1311		/**
1312		* getQueueLength reports number of waiting threads
1313		*/
1314	<	public void testGetQueueLength() throws InterruptedException {
1315	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1314	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1315	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1316	>	public void testGetQueueLength(boolean fair) {
1317	>	final PublicReentrantReadWriteLock lock =
1318	>	new PublicReentrantReadWriteLock(fair);
1319		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1320		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1321		assertEquals(0, lock.getQueueLength());
1322		lock.writeLock().lock();
1323		t1.start();
1324	<	Thread.sleep(SHORT_DELAY_MS);
1324	>	waitForQueuedThread(lock, t1);
1325		assertEquals(1, lock.getQueueLength());
1326		t2.start();
1327	<	Thread.sleep(SHORT_DELAY_MS);
1327	>	waitForQueuedThread(lock, t2);
1328		assertEquals(2, lock.getQueueLength());
1329		t1.interrupt();
1330	<	Thread.sleep(SHORT_DELAY_MS);
1330	>	awaitTermination(t1);
1331		assertEquals(1, lock.getQueueLength());
1332		lock.writeLock().unlock();
1333	<	Thread.sleep(SHORT_DELAY_MS);
1333	>	awaitTermination(t2);
1334		assertEquals(0, lock.getQueueLength());
1039	–	t1.join();
1040	–	t2.join();
1335		}
1336
1337		/**
1338		* getQueuedThreads includes waiting threads
1339		*/
1340	<	public void testGetQueuedThreads() throws InterruptedException {
1341	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1340	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1341	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1342	>	public void testGetQueuedThreads(boolean fair) {
1343	>	final PublicReentrantReadWriteLock lock =
1344	>	new PublicReentrantReadWriteLock(fair);
1345		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1346		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1347		assertTrue(lock.getQueuedThreads().isEmpty());
1348		lock.writeLock().lock();
1349		assertTrue(lock.getQueuedThreads().isEmpty());
1350		t1.start();
1351	<	Thread.sleep(SHORT_DELAY_MS);
1351	>	waitForQueuedThread(lock, t1);
1352	>	assertEquals(1, lock.getQueuedThreads().size());
1353		assertTrue(lock.getQueuedThreads().contains(t1));
1354		t2.start();
1355	<	Thread.sleep(SHORT_DELAY_MS);
1355	>	waitForQueuedThread(lock, t2);
1356	>	assertEquals(2, lock.getQueuedThreads().size());
1357		assertTrue(lock.getQueuedThreads().contains(t1));
1358		assertTrue(lock.getQueuedThreads().contains(t2));
1359		t1.interrupt();
1360	<	Thread.sleep(SHORT_DELAY_MS);
1360	>	awaitTermination(t1);
1361		assertFalse(lock.getQueuedThreads().contains(t1));
1362		assertTrue(lock.getQueuedThreads().contains(t2));
1363	+	assertEquals(1, lock.getQueuedThreads().size());
1364		lock.writeLock().unlock();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1365	>	awaitTermination(t2);
1366		assertTrue(lock.getQueuedThreads().isEmpty());
1067	–	t1.join();
1068	–	t2.join();
1367		}
1368
1369		/**
1370		* hasWaiters throws NPE if null
1371		*/
1372	<	public void testHasWaitersNPE() {
1373	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1372	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1373	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1374	>	public void testHasWaitersNPE(boolean fair) {
1375	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1376		try {
1377		lock.hasWaiters(null);
1378		shouldThrow();
#	Line 1082 | Line 1382 | public class ReentrantReadWriteLockTest
1382		/**
1383		* getWaitQueueLength throws NPE if null
1384		*/
1385	<	public void testGetWaitQueueLengthNPE() {
1386	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1385	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1386	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1387	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1389		try {
1390		lock.getWaitQueueLength(null);
1391		shouldThrow();
1392		} catch (NullPointerException success) {}
1393		}
1394
1093	–
1395		/**
1396		* getWaitingThreads throws NPE if null
1397		*/
1398	<	public void testGetWaitingThreadsNPE() {
1399	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1398	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1399	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1400	>	public void testGetWaitingThreadsNPE(boolean fair) {
1401	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1402		try {
1403		lock.getWaitingThreads(null);
1404		shouldThrow();
#	Line 1103 | Line 1406 | public class ReentrantReadWriteLockTest
1406		}
1407
1408		/**
1409	<	* hasWaiters throws IAE if not owned
1409	>	* hasWaiters throws IllegalArgumentException if not owned
1410		*/
1411	<	public void testHasWaitersIAE() {
1412	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1411	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1412	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1413	>	public void testHasWaitersIAE(boolean fair) {
1414	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1415		final Condition c = lock.writeLock().newCondition();
1416	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1416	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1417		try {
1418		lock2.hasWaiters(c);
1419		shouldThrow();
#	Line 1116 | Line 1421 | public class ReentrantReadWriteLockTest
1421		}
1422
1423		/**
1424	<	* hasWaiters throws IMSE if not locked
1424	>	* hasWaiters throws IllegalMonitorStateException if not locked
1425		*/
1426	<	public void testHasWaitersIMSE() {
1427	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1426	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1427	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1428	>	public void testHasWaitersIMSE(boolean fair) {
1429	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1430		final Condition c = lock.writeLock().newCondition();
1431		try {
1432		lock.hasWaiters(c);
#	Line 1127 | Line 1434 | public class ReentrantReadWriteLockTest
1434		} catch (IllegalMonitorStateException success) {}
1435		}
1436
1130	–
1437		/**
1438	<	* getWaitQueueLength throws IAE if not owned
1438	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1439		*/
1440	<	public void testGetWaitQueueLengthIAE() {
1441	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1440	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1441	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1442	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1443	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1444		final Condition c = lock.writeLock().newCondition();
1445	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1445	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1446		try {
1447		lock2.getWaitQueueLength(c);
1448		shouldThrow();
#	Line 1142 | Line 1450 | public class ReentrantReadWriteLockTest
1450		}
1451
1452		/**
1453	<	* getWaitQueueLength throws IMSE if not locked
1453	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1454		*/
1455	<	public void testGetWaitQueueLengthIMSE() {
1456	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1455	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1456	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1457	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1458	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1459		final Condition c = lock.writeLock().newCondition();
1460		try {
1461		lock.getWaitQueueLength(c);
#	Line 1153 | Line 1463 | public class ReentrantReadWriteLockTest
1463		} catch (IllegalMonitorStateException success) {}
1464		}
1465
1156	–
1466		/**
1467	<	* getWaitingThreads throws IAE if not owned
1467	>	* getWaitingThreads throws IllegalArgumentException if not owned
1468		*/
1469	<	public void testGetWaitingThreadsIAE() {
1470	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1469	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1470	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1471	>	public void testGetWaitingThreadsIAE(boolean fair) {
1472	>	final PublicReentrantReadWriteLock lock =
1473	>	new PublicReentrantReadWriteLock(fair);
1474		final Condition c = lock.writeLock().newCondition();
1475	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1475	>	final PublicReentrantReadWriteLock lock2 =
1476	>	new PublicReentrantReadWriteLock(fair);
1477		try {
1478		lock2.getWaitingThreads(c);
1479		shouldThrow();
#	Line 1168 | Line 1481 | public class ReentrantReadWriteLockTest
1481		}
1482
1483		/**
1484	<	* getWaitingThreads throws IMSE if not locked
1484	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1485		*/
1486	<	public void testGetWaitingThreadsIMSE() {
1487	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1486	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1487	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1488	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1489	>	final PublicReentrantReadWriteLock lock =
1490	>	new PublicReentrantReadWriteLock(fair);
1491		final Condition c = lock.writeLock().newCondition();
1492		try {
1493		lock.getWaitingThreads(c);
#	Line 1179 | Line 1495 | public class ReentrantReadWriteLockTest
1495		} catch (IllegalMonitorStateException success) {}
1496		}
1497
1182	–
1498		/**
1499		* hasWaiters returns true when a thread is waiting, else false
1500		*/
1501	<	public void testHasWaiters() throws InterruptedException {
1502	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1501	>	public void testHasWaiters()      { testHasWaiters(false); }
1502	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1503	>	public void testHasWaiters(boolean fair) {
1504	>	final PublicReentrantReadWriteLock lock =
1505	>	new PublicReentrantReadWriteLock(fair);
1506		final Condition c = lock.writeLock().newCondition();
1507	+	final CountDownLatch locked = new CountDownLatch(1);
1508		Thread t = newStartedThread(new CheckedRunnable() {
1509		public void realRun() throws InterruptedException {
1510		lock.writeLock().lock();
1511	+	assertHasNoWaiters(lock, c);
1512		assertFalse(lock.hasWaiters(c));
1513	<	assertEquals(0, lock.getWaitQueueLength(c));
1513	>	locked.countDown();
1514		c.await();
1515	+	assertHasNoWaiters(lock, c);
1516	+	assertFalse(lock.hasWaiters(c));
1517		lock.writeLock().unlock();
1518		}});
1519
1520	<	Thread.sleep(SHORT_DELAY_MS);
1520	>	await(locked);
1521		lock.writeLock().lock();
1522	+	assertHasWaiters(lock, c, t);
1523		assertTrue(lock.hasWaiters(c));
1201	–	assertEquals(1, lock.getWaitQueueLength(c));
1524		c.signal();
1525	<	lock.writeLock().unlock();
1204	<	Thread.sleep(SHORT_DELAY_MS);
1205	<	lock.writeLock().lock();
1525	>	assertHasNoWaiters(lock, c);
1526		assertFalse(lock.hasWaiters(c));
1207	–	assertEquals(0, lock.getWaitQueueLength(c));
1527		lock.writeLock().unlock();
1528	<	t.join(SHORT_DELAY_MS);
1529	<	assertFalse(t.isAlive());
1528	>	awaitTermination(t);
1529	>	assertHasNoWaiters(lock, c);
1530		}
1531
1532		/**
1533		* getWaitQueueLength returns number of waiting threads
1534		*/
1535	<	public void testGetWaitQueueLength() throws InterruptedException {
1536	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1535	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1536	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1537	>	public void testGetWaitQueueLength(boolean fair) {
1538	>	final PublicReentrantReadWriteLock lock =
1539	>	new PublicReentrantReadWriteLock(fair);
1540		final Condition c = lock.writeLock().newCondition();
1541	+	final CountDownLatch locked = new CountDownLatch(1);
1542		Thread t = newStartedThread(new CheckedRunnable() {
1543		public void realRun() throws InterruptedException {
1544		lock.writeLock().lock();
1222	–	assertFalse(lock.hasWaiters(c));
1545		assertEquals(0, lock.getWaitQueueLength(c));
1546	+	locked.countDown();
1547		c.await();
1548		lock.writeLock().unlock();
1549		}});
1550
1551	<	Thread.sleep(SHORT_DELAY_MS);
1551	>	await(locked);
1552		lock.writeLock().lock();
1553	<	assertTrue(lock.hasWaiters(c));
1553	>	assertHasWaiters(lock, c, t);
1554		assertEquals(1, lock.getWaitQueueLength(c));
1555		c.signal();
1556	<	lock.writeLock().unlock();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1235	<	lock.writeLock().lock();
1236	<	assertFalse(lock.hasWaiters(c));
1556	>	assertHasNoWaiters(lock, c);
1557		assertEquals(0, lock.getWaitQueueLength(c));
1558		lock.writeLock().unlock();
1559	<	t.join(SHORT_DELAY_MS);
1240	<	assertFalse(t.isAlive());
1559	>	awaitTermination(t);
1560		}
1561
1243	–
1562		/**
1563		* getWaitingThreads returns only and all waiting threads
1564		*/
1565	<	public void testGetWaitingThreads() throws InterruptedException {
1566	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1565	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1566	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1567	>	public void testGetWaitingThreads(boolean fair) {
1568	>	final PublicReentrantReadWriteLock lock =
1569	>	new PublicReentrantReadWriteLock(fair);
1570		final Condition c = lock.writeLock().newCondition();
1571	+	final CountDownLatch locked1 = new CountDownLatch(1);
1572	+	final CountDownLatch locked2 = new CountDownLatch(1);
1573		Thread t1 = new Thread(new CheckedRunnable() {
1574		public void realRun() throws InterruptedException {
1575		lock.writeLock().lock();
1576		assertTrue(lock.getWaitingThreads(c).isEmpty());
1577	+	locked1.countDown();
1578		c.await();
1579		lock.writeLock().unlock();
1580		}});
#	Line 1259 | Line 1583 | public class ReentrantReadWriteLockTest
1583		public void realRun() throws InterruptedException {
1584		lock.writeLock().lock();
1585		assertFalse(lock.getWaitingThreads(c).isEmpty());
1586	+	locked2.countDown();
1587		c.await();
1588		lock.writeLock().unlock();
1589		}});
#	Line 1266 | Line 1591 | public class ReentrantReadWriteLockTest
1591		lock.writeLock().lock();
1592		assertTrue(lock.getWaitingThreads(c).isEmpty());
1593		lock.writeLock().unlock();
1594	+
1595		t1.start();
1596	<	Thread.sleep(SHORT_DELAY_MS);
1596	>	await(locked1);
1597		t2.start();
1598	<	Thread.sleep(SHORT_DELAY_MS);
1598	>	await(locked2);
1599	>
1600		lock.writeLock().lock();
1601		assertTrue(lock.hasWaiters(c));
1602		assertTrue(lock.getWaitingThreads(c).contains(t1));
1603		assertTrue(lock.getWaitingThreads(c).contains(t2));
1604	+	assertEquals(2, lock.getWaitingThreads(c).size());
1605		c.signalAll();
1606	+	assertHasNoWaiters(lock, c);
1607		lock.writeLock().unlock();
1608	<	Thread.sleep(SHORT_DELAY_MS);
1609	<	lock.writeLock().lock();
1610	<	assertFalse(lock.hasWaiters(c));
1611	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1612	<	lock.writeLock().unlock();
1284	<	t1.join(SHORT_DELAY_MS);
1285	<	t2.join(SHORT_DELAY_MS);
1286	<	assertFalse(t1.isAlive());
1287	<	assertFalse(t2.isAlive());
1608	>
1609	>	awaitTermination(t1);
1610	>	awaitTermination(t2);
1611	>
1612	>	assertHasNoWaiters(lock, c);
1613		}
1614
1615		/**
1616		* toString indicates current lock state
1617		*/
1618	<	public void testToString() {
1619	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1618	>	public void testToString()      { testToString(false); }
1619	>	public void testToString_fair() { testToString(true); }
1620	>	public void testToString(boolean fair) {
1621	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1622		String us = lock.toString();
1623		assertTrue(us.indexOf("Write locks = 0") >= 0);
1624		assertTrue(us.indexOf("Read locks = 0") >= 0);
#	Line 1310 | Line 1637 | public class ReentrantReadWriteLockTest
1637		/**
1638		* readLock.toString indicates current lock state
1639		*/
1640	<	public void testReadLockToString() {
1641	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1640	>	public void testReadLockToString()      { testReadLockToString(false); }
1641	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1642	>	public void testReadLockToString(boolean fair) {
1643	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1644		String us = lock.readLock().toString();
1645		assertTrue(us.indexOf("Read locks = 0") >= 0);
1646		lock.readLock().lock();
#	Line 1323 | Line 1652 | public class ReentrantReadWriteLockTest
1652		/**
1653		* writeLock.toString indicates current lock state
1654		*/
1655	<	public void testWriteLockToString() {
1656	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1655	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1656	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1657	>	public void testWriteLockToString(boolean fair) {
1658	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659		String us = lock.writeLock().toString();
1660		assertTrue(us.indexOf("Unlocked") >= 0);
1661		lock.writeLock().lock();

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