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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.35 by jsr166, Sat Nov 21 02:07:27 2009 UTC vs.
Revision 1.70 by jsr166, Wed Dec 31 20:34:16 2014 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
13	<	import java.util.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
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) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 31 | Line 40 | public class ReentrantReadWriteLockTest
40		}
41		}
42
34	–
43		/**
44		* A runnable calling lockInterruptibly that expects to be
45		* interrupted
#	Line 49 | 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 58 | Line 70 | public class ReentrantReadWriteLockTest
70		}
71
72		/**
73	<	* Constructor sets given fairness, and is in unlocked state
73	>	* Releases write lock, checking that it had a hold count of 1.
74		*/
75	<	public void testConstructor() {
76	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
77	<	assertFalse(rl.isFair());
78	<	assertFalse(rl.isWriteLocked());
79	<	assertEquals(0, rl.getReadLockCount());
80	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
69	<	assertTrue(r2.isFair());
70	<	assertFalse(r2.isWriteLocked());
71	<	assertEquals(0, r2.getReadLockCount());
72	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
73	<	assertFalse(r3.isFair());
74	<	assertFalse(r3.isWriteLocked());
75	<	assertEquals(0, r3.getReadLockCount());
75	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	>	assertWriteLockedByMoi(lock);
78	>	assertEquals(1, lock.getWriteHoldCount());
79	>	writeLock.unlock();
80	>	assertNotWriteLocked(lock);
81		}
82
83		/**
84	<	* write-locking and read-locking an unlocked lock succeed
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85	>	*/
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 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(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	>	/**
134	>	* Checks that condition c has no waiters.
135	>	*/
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139	>
140	>	/**
141	>	* Checks that condition c has exactly the given waiter threads.
142	>	*/
143	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
144	>	Thread... threads) {
145	>	lock.writeLock().lock();
146	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
147	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
148	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
149	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
150	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
151	>	new HashSet<Thread>(Arrays.asList(threads)));
152	>	lock.writeLock().unlock();
153	>	}
154	>
155	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	>
157	>	/**
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160	<	public void testLock() {
161	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
162	<	rl.writeLock().lock();
163	<	assertTrue(rl.isWriteLocked());
164	<	assertTrue(rl.isWriteLockedByCurrentThread());
165	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
166	<	assertEquals(0, rl.getReadLockCount());
167	<	rl.writeLock().unlock();
168	<	assertFalse(rl.isWriteLocked());
169	<	assertFalse(rl.isWriteLockedByCurrentThread());
170	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
171	<	assertEquals(0, rl.getReadLockCount());
172	<	rl.readLock().lock();
173	<	assertFalse(rl.isWriteLocked());
174	<	assertFalse(rl.isWriteLockedByCurrentThread());
175	<	assertEquals(1, rl.getReadLockCount());
176	<	rl.readLock().unlock();
177	<	assertFalse(rl.isWriteLocked());
178	<	assertFalse(rl.isWriteLockedByCurrentThread());
179	<	assertEquals(0, rl.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	>	default:
178	>	throw new AssertionError();
179	>	}
180		}
181
182	+	/**
183	+	* Constructor sets given fairness, and is in unlocked state
184	+	*/
185	+	public void testConstructor() {
186	+	PublicReentrantReadWriteLock lock;
187	+
188	+	lock = new PublicReentrantReadWriteLock();
189	+	assertFalse(lock.isFair());
190	+	assertNotWriteLocked(lock);
191	+	assertEquals(0, lock.getReadLockCount());
192	+
193	+	lock = new PublicReentrantReadWriteLock(true);
194	+	assertTrue(lock.isFair());
195	+	assertNotWriteLocked(lock);
196	+	assertEquals(0, lock.getReadLockCount());
197	+
198	+	lock = new PublicReentrantReadWriteLock(false);
199	+	assertFalse(lock.isFair());
200	+	assertNotWriteLocked(lock);
201	+	assertEquals(0, lock.getReadLockCount());
202	+	}
203
204		/**
205	<	* locking an unlocked fair lock succeeds
206	<	*/
207	<	public void testFairLock() {
208	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
209	<	rl.writeLock().lock();
210	<	assertTrue(rl.isWriteLocked());
211	<	assertTrue(rl.isWriteLockedByCurrentThread());
212	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
213	<	assertEquals(0, rl.getReadLockCount());
214	<	rl.writeLock().unlock();
215	<	assertFalse(rl.isWriteLocked());
216	<	assertFalse(rl.isWriteLockedByCurrentThread());
217	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
218	<	assertEquals(0, rl.getReadLockCount());
219	<	rl.readLock().lock();
220	<	assertFalse(rl.isWriteLocked());
221	<	assertFalse(rl.isWriteLockedByCurrentThread());
222	<	assertEquals(1, rl.getReadLockCount());
223	<	rl.readLock().unlock();
124	<	assertFalse(rl.isWriteLocked());
125	<	assertFalse(rl.isWriteLockedByCurrentThread());
126	<	assertEquals(0, rl.getReadLockCount());
205	>	* write-locking and read-locking an unlocked lock succeed
206	>	*/
207	>	public void testLock()      { testLock(false); }
208	>	public void testLock_fair() { testLock(true); }
209	>	public void testLock(boolean fair) {
210	>	PublicReentrantReadWriteLock lock =
211	>	new PublicReentrantReadWriteLock(fair);
212	>	assertNotWriteLocked(lock);
213	>	lock.writeLock().lock();
214	>	assertWriteLockedByMoi(lock);
215	>	lock.writeLock().unlock();
216	>	assertNotWriteLocked(lock);
217	>	assertEquals(0, lock.getReadLockCount());
218	>	lock.readLock().lock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(1, lock.getReadLockCount());
221	>	lock.readLock().unlock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(0, lock.getReadLockCount());
224		}
225
226		/**
227		* getWriteHoldCount returns number of recursive holds
228		*/
229	<	public void testGetWriteHoldCount() {
230	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
229	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
230	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
231	>	public void testGetWriteHoldCount(boolean fair) {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
233		for (int i = 1; i <= SIZE; i++) {
234		lock.writeLock().lock();
235		assertEquals(i,lock.getWriteHoldCount());
#	Line 142 | Line 241 | public class ReentrantReadWriteLockTest
241		}
242
243		/**
244	<	* WriteLock.getHoldCount returns number of recursive holds
244	>	* writelock.getHoldCount returns number of recursive holds
245		*/
246	<	public void testGetHoldCount() {
247	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
246	>	public void testGetHoldCount()      { testGetHoldCount(false); }
247	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
248	>	public void testGetHoldCount(boolean fair) {
249	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
250		for (int i = 1; i <= SIZE; i++) {
251		lock.writeLock().lock();
252		assertEquals(i,lock.writeLock().getHoldCount());
#	Line 159 | Line 260 | public class ReentrantReadWriteLockTest
260		/**
261		* getReadHoldCount returns number of recursive holds
262		*/
263	<	public void testGetReadHoldCount() {
264	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
263	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
264	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
265	>	public void testGetReadHoldCount(boolean fair) {
266	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
267		for (int i = 1; i <= SIZE; i++) {
268		lock.readLock().lock();
269		assertEquals(i,lock.getReadHoldCount());
#	Line 171 | Line 274 | public class ReentrantReadWriteLockTest
274		}
275		}
276
174	–
277		/**
278		* write-unlocking an unlocked lock throws IllegalMonitorStateException
279		*/
280	<	public void testUnlock_IllegalMonitorStateException() {
281	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
280	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
281	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
282	>	public void testWriteUnlock_IMSE(boolean fair) {
283	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
284		try {
285	<	rl.writeLock().unlock();
285	>	lock.writeLock().unlock();
286		shouldThrow();
287		} catch (IllegalMonitorStateException success) {}
288		}
289
290	+	/**
291	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
292	+	*/
293	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
294	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
295	+	public void testReadUnlock_IMSE(boolean fair) {
296	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
297	+	try {
298	+	lock.readLock().unlock();
299	+	shouldThrow();
300	+	} catch (IllegalMonitorStateException success) {}
301	+	}
302
303		/**
304		* write-lockInterruptibly is interruptible
305		*/
306	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
307	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
308	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
306	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
307	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
308	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
309	>	final PublicReentrantReadWriteLock lock =
310	>	new PublicReentrantReadWriteLock(fair);
311	>	lock.writeLock().lock();
312	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
313		public void realRun() throws InterruptedException {
314		lock.writeLock().lockInterruptibly();
195	–	lock.writeLock().unlock();
196	–	lock.writeLock().lockInterruptibly();
197	–	lock.writeLock().unlock();
315		}});
316
317	<	lock.writeLock().lock();
201	<	t.start();
202	<	Thread.sleep(SHORT_DELAY_MS);
317	>	waitForQueuedThread(lock, t);
318		t.interrupt();
319	<	Thread.sleep(SHORT_DELAY_MS);
320	<	lock.writeLock().unlock();
206	<	t.join();
319	>	awaitTermination(t);
320	>	releaseWriteLock(lock);
321		}
322
323		/**
324		* timed write-tryLock is interruptible
325		*/
326	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
326	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
327	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
328	>	public void testWriteTryLock_Interruptible(boolean fair) {
329	>	final PublicReentrantReadWriteLock lock =
330	>	new PublicReentrantReadWriteLock(fair);
331		lock.writeLock().lock();
332	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
332	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
333		public void realRun() throws InterruptedException {
334	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
334	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
335		}});
336
337	<	t.start();
337	>	waitForQueuedThread(lock, t);
338		t.interrupt();
339	<	lock.writeLock().unlock();
340	<	t.join();
339	>	awaitTermination(t);
340	>	releaseWriteLock(lock);
341		}
342
343		/**
344		* read-lockInterruptibly is interruptible
345		*/
346	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
346	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
347	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
348	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
349	>	final PublicReentrantReadWriteLock lock =
350	>	new PublicReentrantReadWriteLock(fair);
351		lock.writeLock().lock();
352	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
352	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
353		public void realRun() throws InterruptedException {
354		lock.readLock().lockInterruptibly();
355		}});
356
357	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
357	>	waitForQueuedThread(lock, t);
358		t.interrupt();
359	<	Thread.sleep(SHORT_DELAY_MS);
360	<	lock.writeLock().unlock();
242	<	t.join();
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361		}
362
363		/**
364		* timed read-tryLock is interruptible
365		*/
366	<	public void testReadTryLock_Interrupted() throws InterruptedException {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
366	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
367	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
368	>	public void testReadTryLock_Interruptible(boolean fair) {
369	>	final PublicReentrantReadWriteLock lock =
370	>	new PublicReentrantReadWriteLock(fair);
371		lock.writeLock().lock();
372	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
372	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
373		public void realRun() throws InterruptedException {
374	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
374	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
375		}});
376
377	<	t.start();
377	>	waitForQueuedThread(lock, t);
378		t.interrupt();
379	<	t.join();
379	>	awaitTermination(t);
380	>	releaseWriteLock(lock);
381		}
382
383	+	/**
384	+	* write-tryLock on an unlocked lock succeeds
385	+	*/
386	+	public void testWriteTryLock()      { testWriteTryLock(false); }
387	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
388	+	public void testWriteTryLock(boolean fair) {
389	+	final PublicReentrantReadWriteLock lock =
390	+	new PublicReentrantReadWriteLock(fair);
391	+	assertTrue(lock.writeLock().tryLock());
392	+	assertWriteLockedByMoi(lock);
393	+	assertTrue(lock.writeLock().tryLock());
394	+	assertWriteLockedByMoi(lock);
395	+	lock.writeLock().unlock();
396	+	releaseWriteLock(lock);
397	+	}
398
399		/**
400		* write-tryLock fails if locked
401		*/
402	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
403	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	<	lock.writeLock().lock();
405	<	Thread t = new Thread(new Runnable() {
406	<	public void run() {
407	<	threadAssertFalse(lock.writeLock().tryLock());
408	<	}
409	<	});
402	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
403	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
404	>	public void testWriteTryLockWhenLocked(boolean fair) {
405	>	final PublicReentrantReadWriteLock lock =
406	>	new PublicReentrantReadWriteLock(fair);
407	>	lock.writeLock().lock();
408	>	Thread t = newStartedThread(new CheckedRunnable() {
409	>	public void realRun() {
410	>	assertFalse(lock.writeLock().tryLock());
411	>	}});
412
413	<	t.start();
414	<	t.join();
276	<	lock.writeLock().unlock();
413	>	awaitTermination(t);
414	>	releaseWriteLock(lock);
415		}
416
417		/**
418		* read-tryLock fails if locked
419		*/
420	<	public void testReadTryLockWhenLocked() throws InterruptedException {
421	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
422	<	lock.writeLock().lock();
423	<	Thread t = new Thread(new Runnable() {
424	<	public void run() {
425	<	threadAssertFalse(lock.readLock().tryLock());
426	<	}
427	<	});
420	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
421	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
422	>	public void testReadTryLockWhenLocked(boolean fair) {
423	>	final PublicReentrantReadWriteLock lock =
424	>	new PublicReentrantReadWriteLock(fair);
425	>	lock.writeLock().lock();
426	>	Thread t = newStartedThread(new CheckedRunnable() {
427	>	public void realRun() {
428	>	assertFalse(lock.readLock().tryLock());
429	>	}});
430
431	<	t.start();
432	<	t.join();
293	<	lock.writeLock().unlock();
431	>	awaitTermination(t);
432	>	releaseWriteLock(lock);
433		}
434
435		/**
436		* Multiple threads can hold a read lock when not write-locked
437		*/
438	<	public void testMultipleReadLocks() throws InterruptedException {
439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
438	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
439	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
440	>	public void testMultipleReadLocks(boolean fair) {
441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
442		lock.readLock().lock();
443	<	Thread t = new Thread(new Runnable() {
444	<	public void run() {
445	<	threadAssertTrue(lock.readLock().tryLock());
446	<	lock.readLock().unlock();
447	<	}
448	<	});
443	>	Thread t = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() throws InterruptedException {
445	>	assertTrue(lock.readLock().tryLock());
446	>	lock.readLock().unlock();
447	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
448	>	lock.readLock().unlock();
449	>	lock.readLock().lock();
450	>	lock.readLock().unlock();
451	>	}});
452
453	<	t.start();
310	<	t.join();
453	>	awaitTermination(t);
454		lock.readLock().unlock();
455		}
456
457		/**
458	<	* A writelock succeeds after reading threads unlock
458	>	* A writelock succeeds only after a reading thread unlocks
459		*/
460	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
461	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
460	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
461	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
462	>	public void testWriteAfterReadLock(boolean fair) {
463	>	final PublicReentrantReadWriteLock lock =
464	>	new PublicReentrantReadWriteLock(fair);
465		lock.readLock().lock();
466	<	Thread t1 = new Thread(new Runnable() {
467	<	public void run() {
468	<	lock.readLock().lock();
469	<	lock.readLock().unlock();
470	<	}
471	<	});
472	<	Thread t2 = new Thread(new Runnable() {
473	<	public void run() {
474	<	lock.writeLock().lock();
475	<	lock.writeLock().unlock();
330	<	}
331	<	});
332	<
333	<	t1.start();
334	<	t2.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
466	>	Thread t = newStartedThread(new CheckedRunnable() {
467	>	public void realRun() {
468	>	assertEquals(1, lock.getReadLockCount());
469	>	lock.writeLock().lock();
470	>	assertEquals(0, lock.getReadLockCount());
471	>	lock.writeLock().unlock();
472	>	}});
473	>	waitForQueuedThread(lock, t);
474	>	assertNotWriteLocked(lock);
475	>	assertEquals(1, lock.getReadLockCount());
476		lock.readLock().unlock();
477	<	t1.join(MEDIUM_DELAY_MS);
478	<	t2.join(MEDIUM_DELAY_MS);
479	<	assertTrue(!t1.isAlive());
340	<	assertTrue(!t2.isAlive());
477	>	assertEquals(0, lock.getReadLockCount());
478	>	awaitTermination(t);
479	>	assertNotWriteLocked(lock);
480		}
481
482		/**
483	<	* Readlocks succeed after a writing thread unlocks
483	>	* A writelock succeeds only after reading threads unlock
484		*/
485	<	public void testReadAfterWriteLock() throws InterruptedException {
486	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
487	<	lock.writeLock().lock();
488	<	Thread t1 = new Thread(new Runnable() {
489	<	public void run() {
490	<	lock.readLock().lock();
491	<	lock.readLock().unlock();
492	<	}
493	<	});
494	<	Thread t2 = new Thread(new Runnable() {
495	<	public void run() {
496	<	lock.readLock().lock();
497	<	lock.readLock().unlock();
498	<	}
360	<	});
485	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
486	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
487	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
488	>	final PublicReentrantReadWriteLock lock =
489	>	new PublicReentrantReadWriteLock(fair);
490	>	lock.readLock().lock();
491	>	lock.readLock().lock();
492	>	Thread t1 = newStartedThread(new CheckedRunnable() {
493	>	public void realRun() {
494	>	lock.readLock().lock();
495	>	assertEquals(3, lock.getReadLockCount());
496	>	lock.readLock().unlock();
497	>	}});
498	>	awaitTermination(t1);
499
500	<	t1.start();
501	<	t2.start();
502	<	Thread.sleep(SHORT_DELAY_MS);
503	<	lock.writeLock().unlock();
504	<	t1.join(MEDIUM_DELAY_MS);
505	<	t2.join(MEDIUM_DELAY_MS);
506	<	assertTrue(!t1.isAlive());
507	<	assertTrue(!t2.isAlive());
500	>	Thread t2 = newStartedThread(new CheckedRunnable() {
501	>	public void realRun() {
502	>	assertEquals(2, lock.getReadLockCount());
503	>	lock.writeLock().lock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	lock.writeLock().unlock();
506	>	}});
507	>	waitForQueuedThread(lock, t2);
508	>	assertNotWriteLocked(lock);
509	>	assertEquals(2, lock.getReadLockCount());
510	>	lock.readLock().unlock();
511	>	lock.readLock().unlock();
512	>	assertEquals(0, lock.getReadLockCount());
513	>	awaitTermination(t2);
514	>	assertNotWriteLocked(lock);
515		}
516
517		/**
518	<	* Read trylock succeeds if write locked by current thread
518	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
519	>	* will block if there is a waiting writer thread
520		*/
521	<	public void testReadHoldingWriteLock() {
522	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
523	<	lock.writeLock().lock();
524	<	assertTrue(lock.readLock().tryLock());
521	>	public void testReaderWriterReaderFairFifo() {
522	>	final PublicReentrantReadWriteLock lock =
523	>	new PublicReentrantReadWriteLock(true);
524	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
525	>
526	>	lock.readLock().lock();
527	>	Thread t1 = newStartedThread(new CheckedRunnable() {
528	>	public void realRun() {
529	>	assertEquals(1, lock.getReadLockCount());
530	>	lock.writeLock().lock();
531	>	assertEquals(0, lock.getReadLockCount());
532	>	t1GotLock.set(true);
533	>	lock.writeLock().unlock();
534	>	}});
535	>	waitForQueuedThread(lock, t1);
536	>
537	>	Thread t2 = newStartedThread(new CheckedRunnable() {
538	>	public void realRun() {
539	>	assertEquals(1, lock.getReadLockCount());
540	>	lock.readLock().lock();
541	>	assertEquals(1, lock.getReadLockCount());
542	>	assertTrue(t1GotLock.get());
543	>	lock.readLock().unlock();
544	>	}});
545	>	waitForQueuedThread(lock, t2);
546	>	assertTrue(t1.isAlive());
547	>	assertNotWriteLocked(lock);
548	>	assertEquals(1, lock.getReadLockCount());
549		lock.readLock().unlock();
550	<	lock.writeLock().unlock();
550	>	awaitTermination(t1);
551	>	awaitTermination(t2);
552	>	assertNotWriteLocked(lock);
553		}
554
555		/**
556	<	* Read lock succeeds if write locked by current thread even if
385	<	* other threads are waiting for readlock
556	>	* Readlocks succeed only after a writing thread unlocks
557		*/
558	<	public void testReadHoldingWriteLock2() throws InterruptedException {
559	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
558	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
559	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
560	>	public void testReadAfterWriteLock(boolean fair) {
561	>	final PublicReentrantReadWriteLock lock =
562	>	new PublicReentrantReadWriteLock(fair);
563		lock.writeLock().lock();
564	<	Thread t1 = new Thread(new Runnable() {
565	<	public void run() {
566	<	lock.readLock().lock();
567	<	lock.readLock().unlock();
568	<	}
569	<	});
570	<	Thread t2 = new Thread(new Runnable() {
571	<	public void run() {
572	<	lock.readLock().lock();
573	<	lock.readLock().unlock();
400	<	}
401	<	});
564	>	Thread t1 = newStartedThread(new CheckedRunnable() {
565	>	public void realRun() {
566	>	lock.readLock().lock();
567	>	lock.readLock().unlock();
568	>	}});
569	>	Thread t2 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.readLock().lock();
572	>	lock.readLock().unlock();
573	>	}});
574
575	<	t1.start();
576	<	t2.start();
577	<	lock.readLock().lock();
578	<	lock.readLock().unlock();
579	<	Thread.sleep(SHORT_DELAY_MS);
408	<	lock.readLock().lock();
409	<	lock.readLock().unlock();
410	<	lock.writeLock().unlock();
411	<	t1.join(MEDIUM_DELAY_MS);
412	<	t2.join(MEDIUM_DELAY_MS);
413	<	assertTrue(!t1.isAlive());
414	<	assertTrue(!t2.isAlive());
575	>	waitForQueuedThread(lock, t1);
576	>	waitForQueuedThread(lock, t2);
577	>	releaseWriteLock(lock);
578	>	awaitTermination(t1);
579	>	awaitTermination(t2);
580		}
581
582		/**
583	<	*  Read lock succeeds if write locked by current thread even if
419	<	* other threads are waiting for writelock
583	>	* Read trylock succeeds if write locked by current thread
584		*/
585	<	public void testReadHoldingWriteLock3() throws InterruptedException {
586	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
585	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
586	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
587	>	public void testReadHoldingWriteLock(boolean fair) {
588	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
589		lock.writeLock().lock();
590	<	Thread t1 = new Thread(new Runnable() {
425	<	public void run() {
426	<	lock.writeLock().lock();
427	<	lock.writeLock().unlock();
428	<	}
429	<	});
430	<	Thread t2 = new Thread(new Runnable() {
431	<	public void run() {
432	<	lock.writeLock().lock();
433	<	lock.writeLock().unlock();
434	<	}
435	<	});
436	<
437	<	t1.start();
438	<	t2.start();
439	<	lock.readLock().lock();
440	<	lock.readLock().unlock();
441	<	Thread.sleep(SHORT_DELAY_MS);
442	<	lock.readLock().lock();
590	>	assertTrue(lock.readLock().tryLock());
591		lock.readLock().unlock();
592		lock.writeLock().unlock();
445	–	t1.join(MEDIUM_DELAY_MS);
446	–	t2.join(MEDIUM_DELAY_MS);
447	–	assertTrue(!t1.isAlive());
448	–	assertTrue(!t2.isAlive());
593		}
594
451	–
595		/**
596	<	*  Write lock succeeds if write locked by current thread even if
597	<	* other threads are waiting for writelock
596	>	* Read trylock succeeds (barging) even in the presence of waiting
597	>	* readers and/or writers
598		*/
599	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
600	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
601	<	lock.writeLock().lock();
602	<	Thread t1 = new Thread(new Runnable() {
603	<	public void run() {
604	<	lock.writeLock().lock();
462	<	lock.writeLock().unlock();
463	<	}
464	<	});
465	<	Thread t2 = new Thread(new Runnable() {
466	<	public void run() {
467	<	lock.writeLock().lock();
468	<	lock.writeLock().unlock();
469	<	}
470	<	});
599	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
600	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
601	>	public void testReadTryLockBarging(boolean fair) {
602	>	final PublicReentrantReadWriteLock lock =
603	>	new PublicReentrantReadWriteLock(fair);
604	>	lock.readLock().lock();
605
606	<	t1.start();
607	<	t2.start();
608	<	lock.writeLock().lock();
609	<	lock.writeLock().unlock();
610	<	Thread.sleep(SHORT_DELAY_MS);
477	<	lock.writeLock().lock();
478	<	lock.writeLock().unlock();
479	<	lock.writeLock().unlock();
480	<	t1.join(MEDIUM_DELAY_MS);
481	<	t2.join(MEDIUM_DELAY_MS);
482	<	assertTrue(!t1.isAlive());
483	<	assertTrue(!t2.isAlive());
484	<	}
606	>	Thread t1 = newStartedThread(new CheckedRunnable() {
607	>	public void realRun() {
608	>	lock.writeLock().lock();
609	>	lock.writeLock().unlock();
610	>	}});
611
612	+	waitForQueuedThread(lock, t1);
613
614	<	/**
615	<	* Fair Read trylock succeeds if write locked by current thread
616	<	*/
617	<	public void testReadHoldingWriteLockFair() {
618	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
619	<	lock.writeLock().lock();
620	<	assertTrue(lock.readLock().tryLock());
614	>	Thread t2 = newStartedThread(new CheckedRunnable() {
615	>	public void realRun() {
616	>	lock.readLock().lock();
617	>	lock.readLock().unlock();
618	>	}});
619	>
620	>	if (fair)
621	>	waitForQueuedThread(lock, t2);
622	>
623	>	Thread t3 = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	lock.readLock().tryLock();
626	>	lock.readLock().unlock();
627	>	}});
628	>
629	>	assertTrue(lock.getReadLockCount() > 0);
630	>	awaitTermination(t3);
631	>	assertTrue(t1.isAlive());
632	>	if (fair) assertTrue(t2.isAlive());
633		lock.readLock().unlock();
634	<	lock.writeLock().unlock();
634	>	awaitTermination(t1);
635	>	awaitTermination(t2);
636		}
637
638		/**
639	<	* Fair Read lock succeeds if write locked by current thread even if
639	>	* Read lock succeeds if write locked by current thread even if
640		* other threads are waiting for readlock
641		*/
642	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
643	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
642	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
643	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
644	>	public void testReadHoldingWriteLock2(boolean fair) {
645	>	final PublicReentrantReadWriteLock lock =
646	>	new PublicReentrantReadWriteLock(fair);
647		lock.writeLock().lock();
505	–	Thread t1 = new Thread(new Runnable() {
506	–	public void run() {
507	–	lock.readLock().lock();
508	–	lock.readLock().unlock();
509	–	}
510	–	});
511	–	Thread t2 = new Thread(new Runnable() {
512	–	public void run() {
513	–	lock.readLock().lock();
514	–	lock.readLock().unlock();
515	–	}
516	–	});
517	–
518	–	t1.start();
519	–	t2.start();
648		lock.readLock().lock();
649		lock.readLock().unlock();
650	<	Thread.sleep(SHORT_DELAY_MS);
650	>
651	>	Thread t1 = newStartedThread(new CheckedRunnable() {
652	>	public void realRun() {
653	>	lock.readLock().lock();
654	>	lock.readLock().unlock();
655	>	}});
656	>	Thread t2 = newStartedThread(new CheckedRunnable() {
657	>	public void realRun() {
658	>	lock.readLock().lock();
659	>	lock.readLock().unlock();
660	>	}});
661	>
662	>	waitForQueuedThread(lock, t1);
663	>	waitForQueuedThread(lock, t2);
664	>	assertWriteLockedByMoi(lock);
665		lock.readLock().lock();
666		lock.readLock().unlock();
667	<	lock.writeLock().unlock();
668	<	t1.join(MEDIUM_DELAY_MS);
669	<	t2.join(MEDIUM_DELAY_MS);
528	<	assertTrue(!t1.isAlive());
529	<	assertTrue(!t2.isAlive());
667	>	releaseWriteLock(lock);
668	>	awaitTermination(t1);
669	>	awaitTermination(t2);
670		}
671
532	–
672		/**
673	<	* Fair Read lock succeeds if write locked by current thread even if
673	>	* Read lock succeeds if write locked by current thread even if
674		* other threads are waiting for writelock
675		*/
676	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
677	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
676	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
677	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
678	>	public void testReadHoldingWriteLock3(boolean fair) {
679	>	final PublicReentrantReadWriteLock lock =
680	>	new PublicReentrantReadWriteLock(fair);
681		lock.writeLock().lock();
540	–	Thread t1 = new Thread(new Runnable() {
541	–	public void run() {
542	–	lock.writeLock().lock();
543	–	lock.writeLock().unlock();
544	–	}
545	–	});
546	–	Thread t2 = new Thread(new Runnable() {
547	–	public void run() {
548	–	lock.writeLock().lock();
549	–	lock.writeLock().unlock();
550	–	}
551	–	});
552	–
553	–	t1.start();
554	–	t2.start();
682		lock.readLock().lock();
683		lock.readLock().unlock();
684	<	Thread.sleep(SHORT_DELAY_MS);
684	>
685	>	Thread t1 = newStartedThread(new CheckedRunnable() {
686	>	public void realRun() {
687	>	lock.writeLock().lock();
688	>	lock.writeLock().unlock();
689	>	}});
690	>	Thread t2 = newStartedThread(new CheckedRunnable() {
691	>	public void realRun() {
692	>	lock.writeLock().lock();
693	>	lock.writeLock().unlock();
694	>	}});
695	>
696	>	waitForQueuedThread(lock, t1);
697	>	waitForQueuedThread(lock, t2);
698	>	assertWriteLockedByMoi(lock);
699		lock.readLock().lock();
700		lock.readLock().unlock();
701	+	assertWriteLockedByMoi(lock);
702		lock.writeLock().unlock();
703	<	t1.join(MEDIUM_DELAY_MS);
704	<	t2.join(MEDIUM_DELAY_MS);
563	<	assertTrue(!t1.isAlive());
564	<	assertTrue(!t2.isAlive());
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705		}
706
567	–
707		/**
708	<	* Fair Write lock succeeds if write locked by current thread even if
708	>	* Write lock succeeds if write locked by current thread even if
709		* other threads are waiting for writelock
710		*/
711	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
712	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
711	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
712	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
713	>	public void testWriteHoldingWriteLock4(boolean fair) {
714	>	final PublicReentrantReadWriteLock lock =
715	>	new PublicReentrantReadWriteLock(fair);
716		lock.writeLock().lock();
575	–	Thread t1 = new Thread(new Runnable() {
576	–	public void run() {
577	–	lock.writeLock().lock();
578	–	lock.writeLock().unlock();
579	–	}
580	–	});
581	–	Thread t2 = new Thread(new Runnable() {
582	–	public void run() {
583	–	lock.writeLock().lock();
584	–	lock.writeLock().unlock();
585	–	}
586	–	});
587	–
588	–	t1.start();
589	–	t2.start();
590	–	Thread.sleep(SHORT_DELAY_MS);
591	–	assertTrue(lock.isWriteLockedByCurrentThread());
592	–	assertTrue(lock.getWriteHoldCount() == 1);
717		lock.writeLock().lock();
594	–	assertTrue(lock.getWriteHoldCount() == 2);
718		lock.writeLock().unlock();
719	+
720	+	Thread t1 = newStartedThread(new CheckedRunnable() {
721	+	public void realRun() {
722	+	lock.writeLock().lock();
723	+	lock.writeLock().unlock();
724	+	}});
725	+	Thread t2 = newStartedThread(new CheckedRunnable() {
726	+	public void realRun() {
727	+	lock.writeLock().lock();
728	+	lock.writeLock().unlock();
729	+	}});
730	+
731	+	waitForQueuedThread(lock, t1);
732	+	waitForQueuedThread(lock, t2);
733	+	assertWriteLockedByMoi(lock);
734	+	assertEquals(1, lock.getWriteHoldCount());
735		lock.writeLock().lock();
736	+	assertWriteLockedByMoi(lock);
737	+	assertEquals(2, lock.getWriteHoldCount());
738		lock.writeLock().unlock();
739	+	assertWriteLockedByMoi(lock);
740	+	assertEquals(1, lock.getWriteHoldCount());
741		lock.writeLock().unlock();
742	<	t1.join(MEDIUM_DELAY_MS);
743	<	t2.join(MEDIUM_DELAY_MS);
601	<	assertTrue(!t1.isAlive());
602	<	assertTrue(!t2.isAlive());
742	>	awaitTermination(t1);
743	>	awaitTermination(t2);
744		}
745
605	–
746		/**
747		* Read tryLock succeeds if readlocked but not writelocked
748		*/
749	<	public void testTryLockWhenReadLocked() throws InterruptedException {
750	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
749	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
750	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
751	>	public void testTryLockWhenReadLocked(boolean fair) {
752	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
753		lock.readLock().lock();
754	<	Thread t = new Thread(new Runnable() {
755	<	public void run() {
756	<	threadAssertTrue(lock.readLock().tryLock());
757	<	lock.readLock().unlock();
758	<	}
617	<	});
754	>	Thread t = newStartedThread(new CheckedRunnable() {
755	>	public void realRun() {
756	>	assertTrue(lock.readLock().tryLock());
757	>	lock.readLock().unlock();
758	>	}});
759
760	<	t.start();
620	<	t.join();
760	>	awaitTermination(t);
761		lock.readLock().unlock();
762		}
763
624	–
625	–
764		/**
765		* write tryLock fails when readlocked
766		*/
767	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
768	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
769	<	lock.readLock().lock();
770	<	Thread t = new Thread(new Runnable() {
633	<	public void run() {
634	<	threadAssertFalse(lock.writeLock().tryLock());
635	<	}
636	<	});
637	<
638	<	t.start();
639	<	t.join();
640	<	lock.readLock().unlock();
641	<	}
642	<
643	<
644	<	/**
645	<	* Fair Read tryLock succeeds if readlocked but not writelocked
646	<	*/
647	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
648	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
767	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
768	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
769	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
770	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
771		lock.readLock().lock();
772	<	Thread t = new Thread(new Runnable() {
773	<	public void run() {
774	<	threadAssertTrue(lock.readLock().tryLock());
775	<	lock.readLock().unlock();
654	<	}
655	<	});
772	>	Thread t = newStartedThread(new CheckedRunnable() {
773	>	public void realRun() {
774	>	assertFalse(lock.writeLock().tryLock());
775	>	}});
776
777	<	t.start();
658	<	t.join();
777	>	awaitTermination(t);
778		lock.readLock().unlock();
779		}
780
662	–
663	–
664	–	/**
665	–	* Fair write tryLock fails when readlocked
666	–	*/
667	–	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
668	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
669	–	lock.readLock().lock();
670	–	Thread t = new Thread(new Runnable() {
671	–	public void run() {
672	–	threadAssertFalse(lock.writeLock().tryLock());
673	–	}
674	–	});
675	–
676	–	t.start();
677	–	t.join();
678	–	lock.readLock().unlock();
679	–	}
680	–
681	–
682	–
781		/**
782		* write timed tryLock times out if locked
783		*/
784	<	public void testWriteTryLock_Timeout() throws InterruptedException {
785	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
784	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
785	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
786	>	public void testWriteTryLock_Timeout(boolean fair) {
787	>	final PublicReentrantReadWriteLock lock =
788	>	new PublicReentrantReadWriteLock(fair);
789		lock.writeLock().lock();
790	<	Thread t = new Thread(new CheckedRunnable() {
790	>	Thread t = newStartedThread(new CheckedRunnable() {
791		public void realRun() throws InterruptedException {
792	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
792	>	long startTime = System.nanoTime();
793	>	long timeoutMillis = 10;
794	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
795	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
796		}});
797
798	<	t.start();
799	<	t.join();
696	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
697	<	lock.writeLock().unlock();
798	>	awaitTermination(t);
799	>	releaseWriteLock(lock);
800		}
801
802		/**
803		* read timed tryLock times out if write-locked
804		*/
805	<	public void testReadTryLock_Timeout() throws InterruptedException {
806	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
805	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
806	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
807	>	public void testReadTryLock_Timeout(boolean fair) {
808	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
809		lock.writeLock().lock();
810	<	Thread t = new Thread(new CheckedRunnable() {
810	>	Thread t = newStartedThread(new CheckedRunnable() {
811		public void realRun() throws InterruptedException {
812	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
812	>	long startTime = System.nanoTime();
813	>	long timeoutMillis = 10;
814	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
815	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
816		}});
817
818	<	t.start();
712	<	t.join();
818	>	awaitTermination(t);
819		assertTrue(lock.writeLock().isHeldByCurrentThread());
820		lock.writeLock().unlock();
821		}
822
717	–
823		/**
824	<	* write lockInterruptibly succeeds if lock free else is interruptible
824	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
825		*/
826	<	public void testWriteLockInterruptibly() throws InterruptedException {
827	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
828	<	lock.writeLock().lockInterruptibly();
829	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
826	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
827	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
828	>	public void testWriteLockInterruptibly(boolean fair) {
829	>	final PublicReentrantReadWriteLock lock =
830	>	new PublicReentrantReadWriteLock(fair);
831	>	try {
832	>	lock.writeLock().lockInterruptibly();
833	>	} catch (InterruptedException ie) {
834	>	threadUnexpectedException(ie);
835	>	}
836	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
837		public void realRun() throws InterruptedException {
838		lock.writeLock().lockInterruptibly();
839		}});
840
841	<	t.start();
730	<	Thread.sleep(SHORT_DELAY_MS);
841	>	waitForQueuedThread(lock, t);
842		t.interrupt();
843	<	Thread.sleep(SHORT_DELAY_MS);
844	<	t.join();
845	<	lock.writeLock().unlock();
843	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
844	>	awaitTermination(t);
845	>	releaseWriteLock(lock);
846		}
847
848		/**
849	<	*  read lockInterruptibly succeeds if lock free else is interruptible
849	>	* read lockInterruptibly succeeds if lock free else is interruptible
850		*/
851	<	public void testReadLockInterruptibly() throws InterruptedException {
852	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
853	<	lock.writeLock().lockInterruptibly();
854	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
851	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
852	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
853	>	public void testReadLockInterruptibly(boolean fair) {
854	>	final PublicReentrantReadWriteLock lock =
855	>	new PublicReentrantReadWriteLock(fair);
856	>	try {
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859	>	lock.writeLock().lockInterruptibly();
860	>	} catch (InterruptedException ie) {
861	>	threadUnexpectedException(ie);
862	>	}
863	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
864		public void realRun() throws InterruptedException {
865		lock.readLock().lockInterruptibly();
866		}});
867
868	<	t.start();
749	<	Thread.sleep(SHORT_DELAY_MS);
868	>	waitForQueuedThread(lock, t);
869		t.interrupt();
870	<	t.join();
871	<	lock.writeLock().unlock();
870	>	awaitTermination(t);
871	>	releaseWriteLock(lock);
872		}
873
874		/**
875		* Calling await without holding lock throws IllegalMonitorStateException
876		*/
877	<	public void testAwait_IllegalMonitor() throws InterruptedException {
878	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
877	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
878	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
879	>	public void testAwait_IMSE(boolean fair) {
880	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
881		final Condition c = lock.writeLock().newCondition();
882	<	try {
883	<	c.await();
884	<	shouldThrow();
885	<	} catch (IllegalMonitorStateException success) {}
882	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
883	>	long startTime = System.nanoTime();
884	>	try {
885	>	await(c, awaitMethod);
886	>	shouldThrow();
887	>	} catch (IllegalMonitorStateException success) {
888	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
889	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
890	>	}
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 777 | 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);
789	<	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
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, TimeUnit.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	<	Thread t = new Thread(new CheckedRunnable() {
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	<	t.start();
830	<	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);
835	<	assertFalse(t.isAlive());
836	<	}
837	<
838	<	/** A helper class for uninterruptible wait tests */
839	<	class UninterruptableThread extends Thread {
840	<	private Lock lock;
841	<	private Condition c;
842	<
843	<	public volatile boolean canAwake = false;
844	<	public volatile boolean interrupted = false;
845	<	public volatile boolean lockStarted = false;
846	<
847	<	public UninterruptableThread(Lock lock, Condition c) {
848	<	this.lock = lock;
849	<	this.c = c;
850	<	}
851	<
852	<	public synchronized void run() {
853	<	lock.lock();
854	<	lockStarted = true;
855	<
856	<	while (!canAwake) {
857	<	c.awaitUninterruptibly();
858	<	}
859	<
860	<	interrupted = isInterrupted();
861	<	lock.unlock();
862	<	}
1012	>	awaitTermination(t);
1013		}
1014
1015		/**
1016	<	* awaitUninterruptibly doesn't abort on interrupt
1016	>	* awaitUninterruptibly is uninterruptible
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);
1023	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1024
1025	<	thread.start();
1025	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1026	>	public void realRun() {
1027	>	// Interrupt before awaitUninterruptibly
1028	>	lock.writeLock().lock();
1029	>	pleaseInterrupt.countDown();
1030	>	Thread.currentThread().interrupt();
1031	>	c.awaitUninterruptibly();
1032	>	assertTrue(Thread.interrupted());
1033	>	lock.writeLock().unlock();
1034	>	}});
1035
1036	<	while (!thread.lockStarted) {
1037	<	Thread.sleep(100);
1038	<	}
1036	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1037	>	public void realRun() {
1038	>	// Interrupt during awaitUninterruptibly
1039	>	lock.writeLock().lock();
1040	>	pleaseInterrupt.countDown();
1041	>	c.awaitUninterruptibly();
1042	>	assertTrue(Thread.interrupted());
1043	>	lock.writeLock().unlock();
1044	>	}});
1045
1046	+	await(pleaseInterrupt);
1047		lock.writeLock().lock();
1048	<	try {
1049	<	thread.interrupt();
1050	<	thread.canAwake = true;
1051	<	c.signal();
1052	<	} finally {
1053	<	lock.writeLock().unlock();
1054	<	}
1048	>	lock.writeLock().unlock();
1049	>	t2.interrupt();
1050	>
1051	>	assertThreadStaysAlive(t1);
1052	>	assertTrue(t2.isAlive());
1053	>
1054	>	lock.writeLock().lock();
1055	>	c.signalAll();
1056	>	lock.writeLock().unlock();
1057
1058	<	thread.join();
1059	<	assertTrue(thread.interrupted);
890	<	assertFalse(thread.isAlive());
1058	>	awaitTermination(t1);
1059	>	awaitTermination(t2);
1060		}
1061
1062		/**
1063	<	* await is interruptible
1063	>	* await/awaitNanos/awaitUntil is interruptible
1064		*/
1065	<	public void testAwait_Interrupt() throws InterruptedException {
1066	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1065	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1066	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1067	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1068	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1069	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1070	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1071	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1072	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1073	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1074	>	final PublicReentrantReadWriteLock lock =
1075	>	new PublicReentrantReadWriteLock(fair);
1076		final Condition c = lock.writeLock().newCondition();
1077	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1077	>	final CountDownLatch locked = new CountDownLatch(1);
1078	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1079		public void realRun() throws InterruptedException {
1080		lock.writeLock().lock();
1081	<	c.await();
1082	<	lock.writeLock().unlock();
1081	>	assertWriteLockedByMoi(lock);
1082	>	assertHasNoWaiters(lock, c);
1083	>	locked.countDown();
1084	>	try {
1085	>	await(c, awaitMethod);
1086	>	} finally {
1087	>	assertWriteLockedByMoi(lock);
1088	>	assertHasNoWaiters(lock, c);
1089	>	lock.writeLock().unlock();
1090	>	assertFalse(Thread.interrupted());
1091	>	}
1092		}});
1093
1094	<	t.start();
1095	<	Thread.sleep(SHORT_DELAY_MS);
1094	>	await(locked);
1095	>	assertHasWaiters(lock, c, t);
1096		t.interrupt();
1097	<	t.join(SHORT_DELAY_MS);
1098	<	assertFalse(t.isAlive());
1097	>	awaitTermination(t);
1098	>	assertNotWriteLocked(lock);
1099		}
1100
1101		/**
1102	<	* awaitNanos is interruptible
1102	>	* signalAll wakes up all threads
1103		*/
1104	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1105	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1104	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1105	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1106	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1107	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1108	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1109	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1110	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1111	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1112	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1113	>	final PublicReentrantReadWriteLock lock =
1114	>	new PublicReentrantReadWriteLock(fair);
1115		final Condition c = lock.writeLock().newCondition();
1116	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1116	>	final CountDownLatch locked = new CountDownLatch(2);
1117	>	final Lock writeLock = lock.writeLock();
1118	>	class Awaiter extends CheckedRunnable {
1119		public void realRun() throws InterruptedException {
1120	<	lock.writeLock().lock();
1121	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1122	<	lock.writeLock().unlock();
1123	<	}});
1120	>	writeLock.lock();
1121	>	locked.countDown();
1122	>	await(c, awaitMethod);
1123	>	writeLock.unlock();
1124	>	}
1125	>	}
1126
1127	<	t.start();
1128	<	Thread.sleep(SHORT_DELAY_MS);
1129	<	t.interrupt();
1130	<	t.join(SHORT_DELAY_MS);
1131	<	assertFalse(t.isAlive());
1127	>	Thread t1 = newStartedThread(new Awaiter());
1128	>	Thread t2 = newStartedThread(new Awaiter());
1129	>
1130	>	await(locked);
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	c.signalAll();
1134	>	assertHasNoWaiters(lock, c);
1135	>	writeLock.unlock();
1136	>	awaitTermination(t1);
1137	>	awaitTermination(t2);
1138		}
1139
1140		/**
1141	<	* awaitUntil is interruptible
1141	>	* signal wakes up waiting threads in FIFO order
1142		*/
1143	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1143	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1144	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1145	>	public void testSignalWakesFifo(boolean fair) {
1146	>	final PublicReentrantReadWriteLock lock =
1147	>	new PublicReentrantReadWriteLock(fair);
1148		final Condition c = lock.writeLock().newCondition();
1149	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1149	>	final CountDownLatch locked1 = new CountDownLatch(1);
1150	>	final CountDownLatch locked2 = new CountDownLatch(1);
1151	>	final Lock writeLock = lock.writeLock();
1152	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1153		public void realRun() throws InterruptedException {
1154	<	lock.writeLock().lock();
1155	<	java.util.Date d = new java.util.Date();
1156	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1157	<	lock.writeLock().unlock();
1154	>	writeLock.lock();
1155	>	locked1.countDown();
1156	>	c.await();
1157	>	writeLock.unlock();
1158		}});
1159
1160	<	t.start();
1161	<	Thread.sleep(SHORT_DELAY_MS);
1162	<	t.interrupt();
1163	<	t.join(SHORT_DELAY_MS);
1164	<	assertFalse(t.isAlive());
1160	>	await(locked1);
1161	>
1162	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1163	>	public void realRun() throws InterruptedException {
1164	>	writeLock.lock();
1165	>	locked2.countDown();
1166	>	c.await();
1167	>	writeLock.unlock();
1168	>	}});
1169	>
1170	>	await(locked2);
1171	>
1172	>	writeLock.lock();
1173	>	assertHasWaiters(lock, c, t1, t2);
1174	>	assertFalse(lock.hasQueuedThreads());
1175	>	c.signal();
1176	>	assertHasWaiters(lock, c, t2);
1177	>	assertTrue(lock.hasQueuedThread(t1));
1178	>	assertFalse(lock.hasQueuedThread(t2));
1179	>	c.signal();
1180	>	assertHasNoWaiters(lock, c);
1181	>	assertTrue(lock.hasQueuedThread(t1));
1182	>	assertTrue(lock.hasQueuedThread(t2));
1183	>	writeLock.unlock();
1184	>	awaitTermination(t1);
1185	>	awaitTermination(t2);
1186		}
1187
1188		/**
1189	<	* signalAll wakes up all threads
1190	<	*/
1191	<	public void testSignalAll() throws InterruptedException {
1192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1189	>	* await after multiple reentrant locking preserves lock count
1190	>	*/
1191	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1192	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1193	>	public void testAwaitLockCount(boolean fair) {
1194	>	final PublicReentrantReadWriteLock lock =
1195	>	new PublicReentrantReadWriteLock(fair);
1196		final Condition c = lock.writeLock().newCondition();
1197	<	Thread t1 = new Thread(new CheckedRunnable() {
1197	>	final CountDownLatch locked = new CountDownLatch(2);
1198	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1199		public void realRun() throws InterruptedException {
1200		lock.writeLock().lock();
1201	+	assertWriteLockedByMoi(lock);
1202	+	assertEquals(1, lock.writeLock().getHoldCount());
1203	+	locked.countDown();
1204		c.await();
1205	+	assertWriteLockedByMoi(lock);
1206	+	assertEquals(1, lock.writeLock().getHoldCount());
1207		lock.writeLock().unlock();
1208		}});
1209
1210	<	Thread t2 = new Thread(new CheckedRunnable() {
1210	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1211		public void realRun() throws InterruptedException {
1212		lock.writeLock().lock();
1213	+	lock.writeLock().lock();
1214	+	assertWriteLockedByMoi(lock);
1215	+	assertEquals(2, lock.writeLock().getHoldCount());
1216	+	locked.countDown();
1217		c.await();
1218	+	assertWriteLockedByMoi(lock);
1219	+	assertEquals(2, lock.writeLock().getHoldCount());
1220	+	lock.writeLock().unlock();
1221		lock.writeLock().unlock();
1222		}});
1223
1224	<	t1.start();
975	<	t2.start();
976	<	Thread.sleep(SHORT_DELAY_MS);
1224	>	await(locked);
1225		lock.writeLock().lock();
1226	+	assertHasWaiters(lock, c, t1, t2);
1227		c.signalAll();
1228	+	assertHasNoWaiters(lock, c);
1229		lock.writeLock().unlock();
1230	<	t1.join(SHORT_DELAY_MS);
1231	<	t2.join(SHORT_DELAY_MS);
982	<	assertFalse(t1.isAlive());
983	<	assertFalse(t2.isAlive());
1230	>	awaitTermination(t1);
1231	>	awaitTermination(t2);
1232		}
1233
1234		/**
1235		* A serialized lock deserializes as unlocked
1236		*/
1237	<	public void testSerialization() throws Exception {
1238	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1239	<	l.readLock().lock();
1240	<	l.readLock().unlock();
1241	<
1242	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1243	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1244	<	out.writeObject(l);
1245	<	out.close();
1246	<
1247	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1248	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1249	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1250	<	r.readLock().lock();
1251	<	r.readLock().unlock();
1237	>	public void testSerialization()      { testSerialization(false); }
1238	>	public void testSerialization_fair() { testSerialization(true); }
1239	>	public void testSerialization(boolean fair) {
1240	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1241	>	lock.writeLock().lock();
1242	>	lock.readLock().lock();
1243	>
1244	>	ReentrantReadWriteLock clone = serialClone(lock);
1245	>	assertEquals(lock.isFair(), clone.isFair());
1246	>	assertTrue(lock.isWriteLocked());
1247	>	assertFalse(clone.isWriteLocked());
1248	>	assertEquals(1, lock.getReadLockCount());
1249	>	assertEquals(0, clone.getReadLockCount());
1250	>	clone.writeLock().lock();
1251	>	clone.readLock().lock();
1252	>	assertTrue(clone.isWriteLocked());
1253	>	assertEquals(1, clone.getReadLockCount());
1254	>	clone.readLock().unlock();
1255	>	clone.writeLock().unlock();
1256	>	assertFalse(clone.isWriteLocked());
1257	>	assertEquals(1, lock.getReadLockCount());
1258	>	assertEquals(0, clone.getReadLockCount());
1259		}
1260
1261		/**
1262		* hasQueuedThreads reports whether there are waiting threads
1263		*/
1264	<	public void testhasQueuedThreads() throws InterruptedException {
1265	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1264	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1265	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1266	>	public void testHasQueuedThreads(boolean fair) {
1267	>	final PublicReentrantReadWriteLock lock =
1268	>	new PublicReentrantReadWriteLock(fair);
1269		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1270		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1271		assertFalse(lock.hasQueuedThreads());
1272		lock.writeLock().lock();
1273	+	assertFalse(lock.hasQueuedThreads());
1274		t1.start();
1275	<	Thread.sleep(SHORT_DELAY_MS);
1275	>	waitForQueuedThread(lock, t1);
1276		assertTrue(lock.hasQueuedThreads());
1277		t2.start();
1278	<	Thread.sleep(SHORT_DELAY_MS);
1278	>	waitForQueuedThread(lock, t2);
1279		assertTrue(lock.hasQueuedThreads());
1280		t1.interrupt();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1281	>	awaitTermination(t1);
1282		assertTrue(lock.hasQueuedThreads());
1283		lock.writeLock().unlock();
1284	<	Thread.sleep(SHORT_DELAY_MS);
1284	>	awaitTermination(t2);
1285		assertFalse(lock.hasQueuedThreads());
1027	–	t1.join();
1028	–	t2.join();
1286		}
1287
1288		/**
1289		* hasQueuedThread(null) throws NPE
1290		*/
1291	<	public void testHasQueuedThreadNPE() {
1292	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1291	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1292	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1293	>	public void testHasQueuedThreadNPE(boolean fair) {
1294	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1295		try {
1296	<	sync.hasQueuedThread(null);
1296	>	lock.hasQueuedThread(null);
1297		shouldThrow();
1298		} catch (NullPointerException success) {}
1299		}
1300
1301		/**
1302	<	* hasQueuedThread reports whether a thread is queued.
1302	>	* hasQueuedThread reports whether a thread is queued
1303		*/
1304	<	public void testHasQueuedThread() throws InterruptedException {
1305	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1306	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1307	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1308	<	assertFalse(sync.hasQueuedThread(t1));
1309	<	assertFalse(sync.hasQueuedThread(t2));
1310	<	sync.writeLock().lock();
1304	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1305	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1306	>	public void testHasQueuedThread(boolean fair) {
1307	>	final PublicReentrantReadWriteLock lock =
1308	>	new PublicReentrantReadWriteLock(fair);
1309	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1310	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1311	>	assertFalse(lock.hasQueuedThread(t1));
1312	>	assertFalse(lock.hasQueuedThread(t2));
1313	>	lock.writeLock().lock();
1314		t1.start();
1315	<	Thread.sleep(SHORT_DELAY_MS);
1316	<	assertTrue(sync.hasQueuedThread(t1));
1315	>	waitForQueuedThread(lock, t1);
1316	>	assertTrue(lock.hasQueuedThread(t1));
1317	>	assertFalse(lock.hasQueuedThread(t2));
1318		t2.start();
1319	<	Thread.sleep(SHORT_DELAY_MS);
1320	<	assertTrue(sync.hasQueuedThread(t1));
1321	<	assertTrue(sync.hasQueuedThread(t2));
1319	>	waitForQueuedThread(lock, t2);
1320	>	assertTrue(lock.hasQueuedThread(t1));
1321	>	assertTrue(lock.hasQueuedThread(t2));
1322		t1.interrupt();
1323	<	Thread.sleep(SHORT_DELAY_MS);
1324	<	assertFalse(sync.hasQueuedThread(t1));
1325	<	assertTrue(sync.hasQueuedThread(t2));
1326	<	sync.writeLock().unlock();
1327	<	Thread.sleep(SHORT_DELAY_MS);
1328	<	assertFalse(sync.hasQueuedThread(t1));
1329	<	Thread.sleep(SHORT_DELAY_MS);
1067	<	assertFalse(sync.hasQueuedThread(t2));
1068	<	t1.join();
1069	<	t2.join();
1323	>	awaitTermination(t1);
1324	>	assertFalse(lock.hasQueuedThread(t1));
1325	>	assertTrue(lock.hasQueuedThread(t2));
1326	>	lock.writeLock().unlock();
1327	>	awaitTermination(t2);
1328	>	assertFalse(lock.hasQueuedThread(t1));
1329	>	assertFalse(lock.hasQueuedThread(t2));
1330		}
1331
1072	–
1332		/**
1333		* getQueueLength reports number of waiting threads
1334		*/
1335	<	public void testGetQueueLength() throws InterruptedException {
1336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1335	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1336	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1337	>	public void testGetQueueLength(boolean fair) {
1338	>	final PublicReentrantReadWriteLock lock =
1339	>	new PublicReentrantReadWriteLock(fair);
1340		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1341		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1342		assertEquals(0, lock.getQueueLength());
1343		lock.writeLock().lock();
1344		t1.start();
1345	<	Thread.sleep(SHORT_DELAY_MS);
1345	>	waitForQueuedThread(lock, t1);
1346		assertEquals(1, lock.getQueueLength());
1347		t2.start();
1348	<	Thread.sleep(SHORT_DELAY_MS);
1348	>	waitForQueuedThread(lock, t2);
1349		assertEquals(2, lock.getQueueLength());
1350		t1.interrupt();
1351	<	Thread.sleep(SHORT_DELAY_MS);
1351	>	awaitTermination(t1);
1352		assertEquals(1, lock.getQueueLength());
1353		lock.writeLock().unlock();
1354	<	Thread.sleep(SHORT_DELAY_MS);
1354	>	awaitTermination(t2);
1355		assertEquals(0, lock.getQueueLength());
1094	–	t1.join();
1095	–	t2.join();
1356		}
1357
1358		/**
1359		* getQueuedThreads includes waiting threads
1360		*/
1361	<	public void testGetQueuedThreads() throws InterruptedException {
1362	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1361	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1362	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1363	>	public void testGetQueuedThreads(boolean fair) {
1364	>	final PublicReentrantReadWriteLock lock =
1365	>	new PublicReentrantReadWriteLock(fair);
1366		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1367		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1368		assertTrue(lock.getQueuedThreads().isEmpty());
1369		lock.writeLock().lock();
1370		assertTrue(lock.getQueuedThreads().isEmpty());
1371		t1.start();
1372	<	Thread.sleep(SHORT_DELAY_MS);
1372	>	waitForQueuedThread(lock, t1);
1373	>	assertEquals(1, lock.getQueuedThreads().size());
1374		assertTrue(lock.getQueuedThreads().contains(t1));
1375		t2.start();
1376	<	Thread.sleep(SHORT_DELAY_MS);
1376	>	waitForQueuedThread(lock, t2);
1377	>	assertEquals(2, lock.getQueuedThreads().size());
1378		assertTrue(lock.getQueuedThreads().contains(t1));
1379		assertTrue(lock.getQueuedThreads().contains(t2));
1380		t1.interrupt();
1381	<	Thread.sleep(SHORT_DELAY_MS);
1381	>	awaitTermination(t1);
1382		assertFalse(lock.getQueuedThreads().contains(t1));
1383		assertTrue(lock.getQueuedThreads().contains(t2));
1384	+	assertEquals(1, lock.getQueuedThreads().size());
1385		lock.writeLock().unlock();
1386	<	Thread.sleep(SHORT_DELAY_MS);
1386	>	awaitTermination(t2);
1387		assertTrue(lock.getQueuedThreads().isEmpty());
1122	–	t1.join();
1123	–	t2.join();
1388		}
1389
1390		/**
1391		* hasWaiters throws NPE if null
1392		*/
1393	<	public void testHasWaitersNPE() {
1394	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1393	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1394	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1395	>	public void testHasWaitersNPE(boolean fair) {
1396	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1397		try {
1398		lock.hasWaiters(null);
1399		shouldThrow();
#	Line 1137 | Line 1403 | public class ReentrantReadWriteLockTest
1403		/**
1404		* getWaitQueueLength throws NPE if null
1405		*/
1406	<	public void testGetWaitQueueLengthNPE() {
1407	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1406	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1407	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1408	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1409	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1410		try {
1411		lock.getWaitQueueLength(null);
1412		shouldThrow();
1413		} catch (NullPointerException success) {}
1414		}
1415
1148	–
1416		/**
1417		* getWaitingThreads throws NPE if null
1418		*/
1419	<	public void testGetWaitingThreadsNPE() {
1420	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1419	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1420	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1421	>	public void testGetWaitingThreadsNPE(boolean fair) {
1422	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1423		try {
1424		lock.getWaitingThreads(null);
1425		shouldThrow();
#	Line 1158 | Line 1427 | public class ReentrantReadWriteLockTest
1427		}
1428
1429		/**
1430	<	* hasWaiters throws IAE if not owned
1430	>	* hasWaiters throws IllegalArgumentException if not owned
1431		*/
1432	<	public void testHasWaitersIAE() {
1433	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1432	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1433	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1434	>	public void testHasWaitersIAE(boolean fair) {
1435	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1436		final Condition c = lock.writeLock().newCondition();
1437	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1437	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1438		try {
1439		lock2.hasWaiters(c);
1440		shouldThrow();
#	Line 1171 | Line 1442 | public class ReentrantReadWriteLockTest
1442		}
1443
1444		/**
1445	<	* hasWaiters throws IMSE if not locked
1445	>	* hasWaiters throws IllegalMonitorStateException if not locked
1446		*/
1447	<	public void testHasWaitersIMSE() {
1448	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1447	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1448	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1449	>	public void testHasWaitersIMSE(boolean fair) {
1450	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1451		final Condition c = lock.writeLock().newCondition();
1452		try {
1453		lock.hasWaiters(c);
#	Line 1182 | Line 1455 | public class ReentrantReadWriteLockTest
1455		} catch (IllegalMonitorStateException success) {}
1456		}
1457
1185	–
1458		/**
1459	<	* getWaitQueueLength throws IAE if not owned
1459	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1460		*/
1461	<	public void testGetWaitQueueLengthIAE() {
1462	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1461	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1462	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1463	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1464	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1465		final Condition c = lock.writeLock().newCondition();
1466	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1466	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1467		try {
1468		lock2.getWaitQueueLength(c);
1469		shouldThrow();
#	Line 1197 | Line 1471 | public class ReentrantReadWriteLockTest
1471		}
1472
1473		/**
1474	<	* getWaitQueueLength throws IMSE if not locked
1474	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1475		*/
1476	<	public void testGetWaitQueueLengthIMSE() {
1477	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1476	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1477	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1478	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1479	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1480		final Condition c = lock.writeLock().newCondition();
1481		try {
1482		lock.getWaitQueueLength(c);
#	Line 1208 | Line 1484 | public class ReentrantReadWriteLockTest
1484		} catch (IllegalMonitorStateException success) {}
1485		}
1486
1211	–
1487		/**
1488	<	* getWaitingThreads throws IAE if not owned
1488	>	* getWaitingThreads throws IllegalArgumentException if not owned
1489		*/
1490	<	public void testGetWaitingThreadsIAE() {
1491	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1490	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1491	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1492	>	public void testGetWaitingThreadsIAE(boolean fair) {
1493	>	final PublicReentrantReadWriteLock lock =
1494	>	new PublicReentrantReadWriteLock(fair);
1495		final Condition c = lock.writeLock().newCondition();
1496	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1496	>	final PublicReentrantReadWriteLock lock2 =
1497	>	new PublicReentrantReadWriteLock(fair);
1498		try {
1499		lock2.getWaitingThreads(c);
1500		shouldThrow();
#	Line 1223 | Line 1502 | public class ReentrantReadWriteLockTest
1502		}
1503
1504		/**
1505	<	* getWaitingThreads throws IMSE if not locked
1505	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1506		*/
1507	<	public void testGetWaitingThreadsIMSE() {
1508	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1507	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1508	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1509	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1510	>	final PublicReentrantReadWriteLock lock =
1511	>	new PublicReentrantReadWriteLock(fair);
1512		final Condition c = lock.writeLock().newCondition();
1513		try {
1514		lock.getWaitingThreads(c);
#	Line 1234 | Line 1516 | public class ReentrantReadWriteLockTest
1516		} catch (IllegalMonitorStateException success) {}
1517		}
1518
1237	–
1519		/**
1520		* hasWaiters returns true when a thread is waiting, else false
1521		*/
1522	<	public void testHasWaiters() throws InterruptedException {
1523	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1522	>	public void testHasWaiters()      { testHasWaiters(false); }
1523	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1524	>	public void testHasWaiters(boolean fair) {
1525	>	final PublicReentrantReadWriteLock lock =
1526	>	new PublicReentrantReadWriteLock(fair);
1527		final Condition c = lock.writeLock().newCondition();
1528	<	Thread t = new Thread(new CheckedRunnable() {
1528	>	final CountDownLatch locked = new CountDownLatch(1);
1529	>	Thread t = newStartedThread(new CheckedRunnable() {
1530		public void realRun() throws InterruptedException {
1531		lock.writeLock().lock();
1532	<	threadAssertFalse(lock.hasWaiters(c));
1533	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1532	>	assertHasNoWaiters(lock, c);
1533	>	assertFalse(lock.hasWaiters(c));
1534	>	locked.countDown();
1535		c.await();
1536	+	assertHasNoWaiters(lock, c);
1537	+	assertFalse(lock.hasWaiters(c));
1538		lock.writeLock().unlock();
1539		}});
1540
1541	<	t.start();
1254	<	Thread.sleep(SHORT_DELAY_MS);
1541	>	await(locked);
1542		lock.writeLock().lock();
1543	+	assertHasWaiters(lock, c, t);
1544		assertTrue(lock.hasWaiters(c));
1257	–	assertEquals(1, lock.getWaitQueueLength(c));
1545		c.signal();
1546	<	lock.writeLock().unlock();
1260	<	Thread.sleep(SHORT_DELAY_MS);
1261	<	lock.writeLock().lock();
1546	>	assertHasNoWaiters(lock, c);
1547		assertFalse(lock.hasWaiters(c));
1263	–	assertEquals(0, lock.getWaitQueueLength(c));
1548		lock.writeLock().unlock();
1549	<	t.join(SHORT_DELAY_MS);
1550	<	assertFalse(t.isAlive());
1549	>	awaitTermination(t);
1550	>	assertHasNoWaiters(lock, c);
1551		}
1552
1553		/**
1554		* getWaitQueueLength returns number of waiting threads
1555		*/
1556	<	public void testGetWaitQueueLength() throws InterruptedException {
1557	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1556	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1557	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1558	>	public void testGetWaitQueueLength(boolean fair) {
1559	>	final PublicReentrantReadWriteLock lock =
1560	>	new PublicReentrantReadWriteLock(fair);
1561		final Condition c = lock.writeLock().newCondition();
1562	<	Thread t = new Thread(new CheckedRunnable() {
1562	>	final CountDownLatch locked = new CountDownLatch(1);
1563	>	Thread t = newStartedThread(new CheckedRunnable() {
1564		public void realRun() throws InterruptedException {
1565		lock.writeLock().lock();
1566	<	threadAssertFalse(lock.hasWaiters(c));
1567	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1566	>	assertEquals(0, lock.getWaitQueueLength(c));
1567	>	locked.countDown();
1568		c.await();
1569		lock.writeLock().unlock();
1570		}});
1571
1572	<	t.start();
1285	<	Thread.sleep(SHORT_DELAY_MS);
1572	>	await(locked);
1573		lock.writeLock().lock();
1574	<	assertTrue(lock.hasWaiters(c));
1574	>	assertHasWaiters(lock, c, t);
1575		assertEquals(1, lock.getWaitQueueLength(c));
1576		c.signal();
1577	<	lock.writeLock().unlock();
1291	<	Thread.sleep(SHORT_DELAY_MS);
1292	<	lock.writeLock().lock();
1293	<	assertFalse(lock.hasWaiters(c));
1577	>	assertHasNoWaiters(lock, c);
1578		assertEquals(0, lock.getWaitQueueLength(c));
1579		lock.writeLock().unlock();
1580	<	t.join(SHORT_DELAY_MS);
1297	<	assertFalse(t.isAlive());
1580	>	awaitTermination(t);
1581		}
1582
1300	–
1583		/**
1584		* getWaitingThreads returns only and all waiting threads
1585		*/
1586	<	public void testGetWaitingThreads() throws InterruptedException {
1587	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1586	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1587	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1588	>	public void testGetWaitingThreads(boolean fair) {
1589	>	final PublicReentrantReadWriteLock lock =
1590	>	new PublicReentrantReadWriteLock(fair);
1591		final Condition c = lock.writeLock().newCondition();
1592	+	final CountDownLatch locked1 = new CountDownLatch(1);
1593	+	final CountDownLatch locked2 = new CountDownLatch(1);
1594		Thread t1 = new Thread(new CheckedRunnable() {
1595		public void realRun() throws InterruptedException {
1596		lock.writeLock().lock();
1597	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1597	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1598	>	locked1.countDown();
1599		c.await();
1600		lock.writeLock().unlock();
1601		}});
#	Line 1315 | Line 1603 | public class ReentrantReadWriteLockTest
1603		Thread t2 = new Thread(new CheckedRunnable() {
1604		public void realRun() throws InterruptedException {
1605		lock.writeLock().lock();
1606	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1606	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1607	>	locked2.countDown();
1608		c.await();
1609		lock.writeLock().unlock();
1610		}});
#	Line 1323 | Line 1612 | public class ReentrantReadWriteLockTest
1612		lock.writeLock().lock();
1613		assertTrue(lock.getWaitingThreads(c).isEmpty());
1614		lock.writeLock().unlock();
1615	+
1616		t1.start();
1617	<	Thread.sleep(SHORT_DELAY_MS);
1617	>	await(locked1);
1618		t2.start();
1619	<	Thread.sleep(SHORT_DELAY_MS);
1619	>	await(locked2);
1620	>
1621		lock.writeLock().lock();
1622		assertTrue(lock.hasWaiters(c));
1623		assertTrue(lock.getWaitingThreads(c).contains(t1));
1624		assertTrue(lock.getWaitingThreads(c).contains(t2));
1625	+	assertEquals(2, lock.getWaitingThreads(c).size());
1626		c.signalAll();
1627	+	assertHasNoWaiters(lock, c);
1628		lock.writeLock().unlock();
1629	<	Thread.sleep(SHORT_DELAY_MS);
1630	<	lock.writeLock().lock();
1631	<	assertFalse(lock.hasWaiters(c));
1632	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1633	<	lock.writeLock().unlock();
1341	<	t1.join(SHORT_DELAY_MS);
1342	<	t2.join(SHORT_DELAY_MS);
1343	<	assertFalse(t1.isAlive());
1344	<	assertFalse(t2.isAlive());
1629	>
1630	>	awaitTermination(t1);
1631	>	awaitTermination(t2);
1632	>
1633	>	assertHasNoWaiters(lock, c);
1634		}
1635
1636		/**
1637		* toString indicates current lock state
1638		*/
1639	<	public void testToString() {
1640	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1641	<	String us = lock.toString();
1642	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1643	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1644	<	lock.writeLock().lock();
1645	<	String ws = lock.toString();
1646	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1647	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1639	>	public void testToString()      { testToString(false); }
1640	>	public void testToString_fair() { testToString(true); }
1641	>	public void testToString(boolean fair) {
1642	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1643	>	assertTrue(lock.toString().contains("Write locks = 0"));
1644	>	assertTrue(lock.toString().contains("Read locks = 0"));
1645	>	lock.writeLock().lock();
1646	>	assertTrue(lock.toString().contains("Write locks = 1"));
1647	>	assertTrue(lock.toString().contains("Read locks = 0"));
1648		lock.writeLock().unlock();
1649		lock.readLock().lock();
1650		lock.readLock().lock();
1651	<	String rs = lock.toString();
1652	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1364	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1651	>	assertTrue(lock.toString().contains("Write locks = 0"));
1652	>	assertTrue(lock.toString().contains("Read locks = 2"));
1653		}
1654
1655		/**
1656		* readLock.toString indicates current lock state
1657		*/
1658	<	public void testReadLockToString() {
1659	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1660	<	String us = lock.readLock().toString();
1661	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1658	>	public void testReadLockToString()      { testReadLockToString(false); }
1659	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1660	>	public void testReadLockToString(boolean fair) {
1661	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1662	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1663		lock.readLock().lock();
1664		lock.readLock().lock();
1665	<	String rs = lock.readLock().toString();
1377	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1665	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1666		}
1667
1668		/**
1669		* writeLock.toString indicates current lock state
1670		*/
1671	<	public void testWriteLockToString() {
1672	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1673	<	String us = lock.writeLock().toString();
1674	<	assertTrue(us.indexOf("Unlocked") >= 0);
1671	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1672	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1673	>	public void testWriteLockToString(boolean fair) {
1674	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1675	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1676		lock.writeLock().lock();
1677	<	String ls = lock.writeLock().toString();
1678	<	assertTrue(ls.indexOf("Locked") >= 0);
1677	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1678	>	lock.writeLock().unlock();
1679	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1680		}
1681
1682		}

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