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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.32 by jsr166, Tue Nov 17 14:18:28 2009 UTC vs.
Revision 1.81 by jsr166, Mon Jul 17 21:01:30 2017 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	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class ReentrantReadWriteLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30	<	return new TestSuite(ReentrantReadWriteLockTest.class);
30	>	return new TestSuite(ReentrantReadWriteLockTest.class);
31		}
32
33		/**
#	Line 31 | Line 41 | public class ReentrantReadWriteLockTest
41		}
42		}
43
34	–
44		/**
45		* A runnable calling lockInterruptibly that expects to be
46		* interrupted
#	Line 49 | Line 58 | public class ReentrantReadWriteLockTest
58		*/
59		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
60		PublicReentrantReadWriteLock() { super(); }
61	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
62	+	public Thread getOwner() {
63	+	return super.getOwner();
64	+	}
65		public Collection<Thread> getQueuedThreads() {
66		return super.getQueuedThreads();
67		}
#	Line 58 | Line 71 | public class ReentrantReadWriteLockTest
71		}
72
73		/**
74	<	* Constructor sets given fairness, and is in unlocked state
74	>	* Releases write lock, checking that it had a hold count of 1.
75		*/
76	<	public void testConstructor() {
77	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
78	<	assertFalse(rl.isFair());
79	<	assertFalse(rl.isWriteLocked());
80	<	assertEquals(0, rl.getReadLockCount());
81	<	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());
76	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
77	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
78	>	assertWriteLockedByMoi(lock);
79	>	assertEquals(1, lock.getWriteHoldCount());
80	>	writeLock.unlock();
81	>	assertNotWriteLocked(lock);
82		}
83
84		/**
85	<	* write-locking and read-locking an unlocked lock succeed
85	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
86	>	*/
87	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
88	>	long startTime = System.nanoTime();
89	>	while (!lock.hasQueuedThread(t)) {
90	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
91	>	throw new AssertionFailedError("timed out");
92	>	Thread.yield();
93	>	}
94	>	assertTrue(t.isAlive());
95	>	assertNotSame(t, lock.getOwner());
96	>	}
97	>
98	>	/**
99	>	* Checks that lock is not write-locked.
100		*/
101	<	public void testLock() {
102	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
103	<	rl.writeLock().lock();
104	<	assertTrue(rl.isWriteLocked());
105	<	assertTrue(rl.isWriteLockedByCurrentThread());
106	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
107	<	assertEquals(0, rl.getReadLockCount());
108	<	rl.writeLock().unlock();
109	<	assertFalse(rl.isWriteLocked());
110	<	assertFalse(rl.isWriteLockedByCurrentThread());
111	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
112	<	assertEquals(0, rl.getReadLockCount());
113	<	rl.readLock().lock();
114	<	assertFalse(rl.isWriteLocked());
115	<	assertFalse(rl.isWriteLockedByCurrentThread());
116	<	assertEquals(1, rl.getReadLockCount());
117	<	rl.readLock().unlock();
118	<	assertFalse(rl.isWriteLocked());
119	<	assertFalse(rl.isWriteLockedByCurrentThread());
120	<	assertEquals(0, rl.getReadLockCount());
101	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
102	>	assertFalse(lock.isWriteLocked());
103	>	assertFalse(lock.isWriteLockedByCurrentThread());
104	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
105	>	assertEquals(0, lock.getWriteHoldCount());
106	>	assertEquals(0, lock.writeLock().getHoldCount());
107	>	assertNull(lock.getOwner());
108	>	}
109	>
110	>	/**
111	>	* Checks that lock is write-locked by the given thread.
112	>	*/
113	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
114	>	assertTrue(lock.isWriteLocked());
115	>	assertSame(t, lock.getOwner());
116	>	assertEquals(t == Thread.currentThread(),
117	>	lock.isWriteLockedByCurrentThread());
118	>	assertEquals(t == Thread.currentThread(),
119	>	lock.writeLock().isHeldByCurrentThread());
120	>	assertEquals(t == Thread.currentThread(),
121	>	lock.getWriteHoldCount() > 0);
122	>	assertEquals(t == Thread.currentThread(),
123	>	lock.writeLock().getHoldCount() > 0);
124	>	assertEquals(0, lock.getReadLockCount());
125	>	}
126	>
127	>	/**
128	>	* Checks that lock is write-locked by the current thread.
129	>	*/
130	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
131	>	assertWriteLockedBy(lock, Thread.currentThread());
132	>	}
133	>
134	>	/**
135	>	* Checks that condition c has no waiters.
136	>	*/
137	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
138	>	assertHasWaiters(lock, c, new Thread[] {});
139	>	}
140	>
141	>	/**
142	>	* Checks that condition c has exactly the given waiter threads.
143	>	*/
144	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
145	>	Thread... threads) {
146	>	lock.writeLock().lock();
147	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
148	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
149	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
150	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
151	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
152	>	new HashSet<Thread>(Arrays.asList(threads)));
153	>	lock.writeLock().unlock();
154	>	}
155	>
156	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
157	>
158	>	/**
159	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
160	>	*/
161	>	void await(Condition c, AwaitMethod awaitMethod)
162	>	throws InterruptedException {
163	>	long timeoutMillis = 2 * LONG_DELAY_MS;
164	>	switch (awaitMethod) {
165	>	case await:
166	>	c.await();
167	>	break;
168	>	case awaitTimed:
169	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
170	>	break;
171	>	case awaitNanos:
172	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
173	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
174	>	assertTrue(nanosRemaining > timeoutNanos / 2);
175	>	assertTrue(nanosRemaining <= timeoutNanos);
176	>	break;
177	>	case awaitUntil:
178	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
179	>	break;
180	>	default:
181	>	throw new AssertionError();
182	>	}
183		}
184
185	+	/**
186	+	* Constructor sets given fairness, and is in unlocked state
187	+	*/
188	+	public void testConstructor() {
189	+	PublicReentrantReadWriteLock lock;
190	+
191	+	lock = new PublicReentrantReadWriteLock();
192	+	assertFalse(lock.isFair());
193	+	assertNotWriteLocked(lock);
194	+	assertEquals(0, lock.getReadLockCount());
195	+
196	+	lock = new PublicReentrantReadWriteLock(true);
197	+	assertTrue(lock.isFair());
198	+	assertNotWriteLocked(lock);
199	+	assertEquals(0, lock.getReadLockCount());
200	+
201	+	lock = new PublicReentrantReadWriteLock(false);
202	+	assertFalse(lock.isFair());
203	+	assertNotWriteLocked(lock);
204	+	assertEquals(0, lock.getReadLockCount());
205	+	}
206
207		/**
208	<	* locking an unlocked fair lock succeeds
209	<	*/
210	<	public void testFairLock() {
211	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
212	<	rl.writeLock().lock();
213	<	assertTrue(rl.isWriteLocked());
214	<	assertTrue(rl.isWriteLockedByCurrentThread());
215	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
216	<	assertEquals(0, rl.getReadLockCount());
217	<	rl.writeLock().unlock();
218	<	assertFalse(rl.isWriteLocked());
219	<	assertFalse(rl.isWriteLockedByCurrentThread());
220	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
221	<	assertEquals(0, rl.getReadLockCount());
222	<	rl.readLock().lock();
223	<	assertFalse(rl.isWriteLocked());
224	<	assertFalse(rl.isWriteLockedByCurrentThread());
225	<	assertEquals(1, rl.getReadLockCount());
226	<	rl.readLock().unlock();
124	<	assertFalse(rl.isWriteLocked());
125	<	assertFalse(rl.isWriteLockedByCurrentThread());
126	<	assertEquals(0, rl.getReadLockCount());
208	>	* write-locking and read-locking an unlocked lock succeed
209	>	*/
210	>	public void testLock()      { testLock(false); }
211	>	public void testLock_fair() { testLock(true); }
212	>	public void testLock(boolean fair) {
213	>	PublicReentrantReadWriteLock lock =
214	>	new PublicReentrantReadWriteLock(fair);
215	>	assertNotWriteLocked(lock);
216	>	lock.writeLock().lock();
217	>	assertWriteLockedByMoi(lock);
218	>	lock.writeLock().unlock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(0, lock.getReadLockCount());
221	>	lock.readLock().lock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(1, lock.getReadLockCount());
224	>	lock.readLock().unlock();
225	>	assertNotWriteLocked(lock);
226	>	assertEquals(0, lock.getReadLockCount());
227		}
228
229		/**
230		* getWriteHoldCount returns number of recursive holds
231		*/
232	<	public void testGetWriteHoldCount() {
233	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
234	<	for (int i = 1; i <= SIZE; i++) {
235	<	lock.writeLock().lock();
236	<	assertEquals(i,lock.getWriteHoldCount());
237	<	}
238	<	for (int i = SIZE; i > 0; i--) {
239	<	lock.writeLock().unlock();
240	<	assertEquals(i-1,lock.getWriteHoldCount());
241	<	}
232	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
233	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
234	>	public void testGetWriteHoldCount(boolean fair) {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
236	>	for (int i = 1; i <= SIZE; i++) {
237	>	lock.writeLock().lock();
238	>	assertEquals(i,lock.getWriteHoldCount());
239	>	}
240	>	for (int i = SIZE; i > 0; i--) {
241	>	lock.writeLock().unlock();
242	>	assertEquals(i - 1,lock.getWriteHoldCount());
243	>	}
244		}
245
246		/**
247	<	* WriteLock.getHoldCount returns number of recursive holds
248	<	*/
249	<	public void testGetHoldCount() {
250	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
251	<	for (int i = 1; i <= SIZE; i++) {
252	<	lock.writeLock().lock();
253	<	assertEquals(i,lock.writeLock().getHoldCount());
254	<	}
255	<	for (int i = SIZE; i > 0; i--) {
256	<	lock.writeLock().unlock();
257	<	assertEquals(i-1,lock.writeLock().getHoldCount());
258	<	}
247	>	* writelock.getHoldCount returns number of recursive holds
248	>	*/
249	>	public void testGetHoldCount()      { testGetHoldCount(false); }
250	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
251	>	public void testGetHoldCount(boolean fair) {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
253	>	for (int i = 1; i <= SIZE; i++) {
254	>	lock.writeLock().lock();
255	>	assertEquals(i,lock.writeLock().getHoldCount());
256	>	}
257	>	for (int i = SIZE; i > 0; i--) {
258	>	lock.writeLock().unlock();
259	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
260	>	}
261		}
262
263		/**
264		* getReadHoldCount returns number of recursive holds
265		*/
266	<	public void testGetReadHoldCount() {
267	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
268	<	for (int i = 1; i <= SIZE; i++) {
269	<	lock.readLock().lock();
270	<	assertEquals(i,lock.getReadHoldCount());
271	<	}
272	<	for (int i = SIZE; i > 0; i--) {
273	<	lock.readLock().unlock();
274	<	assertEquals(i-1,lock.getReadHoldCount());
275	<	}
266	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
267	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
268	>	public void testGetReadHoldCount(boolean fair) {
269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
270	>	for (int i = 1; i <= SIZE; i++) {
271	>	lock.readLock().lock();
272	>	assertEquals(i,lock.getReadHoldCount());
273	>	}
274	>	for (int i = SIZE; i > 0; i--) {
275	>	lock.readLock().unlock();
276	>	assertEquals(i - 1,lock.getReadHoldCount());
277	>	}
278		}
279
174	–
280		/**
281		* write-unlocking an unlocked lock throws IllegalMonitorStateException
282		*/
283	<	public void testUnlock_IllegalMonitorStateException() {
284	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
285	<	try {
286	<	rl.writeLock().unlock();
287	<	shouldThrow();
288	<	} catch (IllegalMonitorStateException success) {}
283	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
284	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
285	>	public void testWriteUnlock_IMSE(boolean fair) {
286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
287	>	try {
288	>	lock.writeLock().unlock();
289	>	shouldThrow();
290	>	} catch (IllegalMonitorStateException success) {}
291		}
292
293	+	/**
294	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
295	+	*/
296	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
297	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
298	+	public void testReadUnlock_IMSE(boolean fair) {
299	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
300	+	try {
301	+	lock.readLock().unlock();
302	+	shouldThrow();
303	+	} catch (IllegalMonitorStateException success) {}
304	+	}
305
306		/**
307		* write-lockInterruptibly is interruptible
308		*/
309	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
310	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
311	<	Thread t = new Thread(new Runnable() {
312	<	public void run() {
313	<	try {
314	<	lock.writeLock().lockInterruptibly();
315	<	lock.writeLock().unlock();
316	<	lock.writeLock().lockInterruptibly();
317	<	lock.writeLock().unlock();
318	<	} catch (InterruptedException success) {}
200	<	}
201	<	});
309	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
310	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
311	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
312	>	final PublicReentrantReadWriteLock lock =
313	>	new PublicReentrantReadWriteLock(fair);
314	>	lock.writeLock().lock();
315	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
316	>	public void realRun() throws InterruptedException {
317	>	lock.writeLock().lockInterruptibly();
318	>	}});
319
320	<	lock.writeLock().lock();
204	<	t.start();
205	<	Thread.sleep(SHORT_DELAY_MS);
320	>	waitForQueuedThread(lock, t);
321		t.interrupt();
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	lock.writeLock().unlock();
209	<	t.join();
322	>	awaitTermination(t);
323	>	releaseWriteLock(lock);
324		}
325
326		/**
327		* timed write-tryLock is interruptible
328		*/
329	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
330	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
331	<	lock.writeLock().lock();
332	<	Thread t = new Thread(new Runnable() {
333	<	public void run() {
334	<	try {
335	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
336	<	} catch (InterruptedException success) {}
337	<	}
338	<	});
329	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
330	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
331	>	public void testWriteTryLock_Interruptible(boolean fair) {
332	>	final PublicReentrantReadWriteLock lock =
333	>	new PublicReentrantReadWriteLock(fair);
334	>	lock.writeLock().lock();
335	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
336	>	public void realRun() throws InterruptedException {
337	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
338	>	}});
339
340	<	t.start();
340	>	waitForQueuedThread(lock, t);
341		t.interrupt();
342	<	lock.writeLock().unlock();
343	<	t.join();
342	>	awaitTermination(t);
343	>	releaseWriteLock(lock);
344		}
345
346		/**
347		* read-lockInterruptibly is interruptible
348		*/
349	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
350	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
351	<	lock.writeLock().lock();
352	<	Thread t = new Thread(new Runnable() {
353	<	public void run() {
354	<	try {
355	<	lock.readLock().lockInterruptibly();
356	<	} catch (InterruptedException success) {}
357	<	}
358	<	});
349	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
350	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
351	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
352	>	final PublicReentrantReadWriteLock lock =
353	>	new PublicReentrantReadWriteLock(fair);
354	>	lock.writeLock().lock();
355	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
356	>	public void realRun() throws InterruptedException {
357	>	lock.readLock().lockInterruptibly();
358	>	}});
359
360	<	t.start();
247	<	Thread.sleep(SHORT_DELAY_MS);
360	>	waitForQueuedThread(lock, t);
361		t.interrupt();
362	<	Thread.sleep(SHORT_DELAY_MS);
363	<	lock.writeLock().unlock();
251	<	t.join();
362	>	awaitTermination(t);
363	>	releaseWriteLock(lock);
364		}
365
366		/**
367		* timed read-tryLock is interruptible
368		*/
369	<	public void testReadTryLock_Interrupted() throws InterruptedException {
370	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
371	<	lock.writeLock().lock();
372	<	Thread t = new Thread(new Runnable() {
373	<	public void run() {
374	<	try {
375	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
376	<	threadShouldThrow();
377	<	} catch (InterruptedException success) {}
378	<	}
267	<	});
369	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
370	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
371	>	public void testReadTryLock_Interruptible(boolean fair) {
372	>	final PublicReentrantReadWriteLock lock =
373	>	new PublicReentrantReadWriteLock(fair);
374	>	lock.writeLock().lock();
375	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
376	>	public void realRun() throws InterruptedException {
377	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
378	>	}});
379
380	<	t.start();
380	>	waitForQueuedThread(lock, t);
381		t.interrupt();
382	<	t.join();
382	>	awaitTermination(t);
383	>	releaseWriteLock(lock);
384		}
385
274	–
386		/**
387	<	* write-tryLock fails if locked
387	>	* write-tryLock on an unlocked lock succeeds
388		*/
389	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
390	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
391	<	lock.writeLock().lock();
392	<	Thread t = new Thread(new Runnable() {
393	<	public void run() {
394	<	threadAssertFalse(lock.writeLock().tryLock());
395	<	}
396	<	});
397	<
287	<	t.start();
288	<	t.join();
389	>	public void testWriteTryLock()      { testWriteTryLock(false); }
390	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
391	>	public void testWriteTryLock(boolean fair) {
392	>	final PublicReentrantReadWriteLock lock =
393	>	new PublicReentrantReadWriteLock(fair);
394	>	assertTrue(lock.writeLock().tryLock());
395	>	assertWriteLockedByMoi(lock);
396	>	assertTrue(lock.writeLock().tryLock());
397	>	assertWriteLockedByMoi(lock);
398		lock.writeLock().unlock();
399	+	releaseWriteLock(lock);
400		}
401
402		/**
403	<	* read-tryLock fails if locked
403	>	* write-tryLock fails if locked
404		*/
405	<	public void testReadTryLockWhenLocked() throws InterruptedException {
406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
407	<	lock.writeLock().lock();
408	<	Thread t = new Thread(new Runnable() {
409	<	public void run() {
410	<	threadAssertFalse(lock.readLock().tryLock());
411	<	}
412	<	});
405	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
406	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
407	>	public void testWriteTryLockWhenLocked(boolean fair) {
408	>	final PublicReentrantReadWriteLock lock =
409	>	new PublicReentrantReadWriteLock(fair);
410	>	lock.writeLock().lock();
411	>	Thread t = newStartedThread(new CheckedRunnable() {
412	>	public void realRun() {
413	>	assertFalse(lock.writeLock().tryLock());
414	>	}});
415
416	<	t.start();
417	<	t.join();
306	<	lock.writeLock().unlock();
416	>	awaitTermination(t);
417	>	releaseWriteLock(lock);
418		}
419
420		/**
421	<	* Multiple threads can hold a read lock when not write-locked
421	>	* read-tryLock fails if locked
422		*/
423	<	public void testMultipleReadLocks() throws InterruptedException {
424	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
425	<	lock.readLock().lock();
426	<	Thread t = new Thread(new Runnable() {
427	<	public void run() {
428	<	threadAssertTrue(lock.readLock().tryLock());
429	<	lock.readLock().unlock();
430	<	}
431	<	});
423	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
424	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
425	>	public void testReadTryLockWhenLocked(boolean fair) {
426	>	final PublicReentrantReadWriteLock lock =
427	>	new PublicReentrantReadWriteLock(fair);
428	>	lock.writeLock().lock();
429	>	Thread t = newStartedThread(new CheckedRunnable() {
430	>	public void realRun() {
431	>	assertFalse(lock.readLock().tryLock());
432	>	}});
433
434	<	t.start();
435	<	t.join();
324	<	lock.readLock().unlock();
434	>	awaitTermination(t);
435	>	releaseWriteLock(lock);
436		}
437
438		/**
439	<	* A writelock succeeds after reading threads unlock
439	>	* Multiple threads can hold a read lock when not write-locked
440		*/
441	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
442	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
443	<	lock.readLock().lock();
444	<	Thread t1 = new Thread(new Runnable() {
445	<	public void run() {
446	<	lock.readLock().lock();
447	<	lock.readLock().unlock();
448	<	}
449	<	});
450	<	Thread t2 = new Thread(new Runnable() {
451	<	public void run() {
452	<	lock.writeLock().lock();
453	<	lock.writeLock().unlock();
454	<	}
344	<	});
441	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
442	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
443	>	public void testMultipleReadLocks(boolean fair) {
444	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
445	>	lock.readLock().lock();
446	>	Thread t = newStartedThread(new CheckedRunnable() {
447	>	public void realRun() throws InterruptedException {
448	>	assertTrue(lock.readLock().tryLock());
449	>	lock.readLock().unlock();
450	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
451	>	lock.readLock().unlock();
452	>	lock.readLock().lock();
453	>	lock.readLock().unlock();
454	>	}});
455
456	<	t1.start();
347	<	t2.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
456	>	awaitTermination(t);
457		lock.readLock().unlock();
350	–	t1.join(MEDIUM_DELAY_MS);
351	–	t2.join(MEDIUM_DELAY_MS);
352	–	assertTrue(!t1.isAlive());
353	–	assertTrue(!t2.isAlive());
458		}
459
460		/**
461	<	* Readlocks succeed after a writing thread unlocks
358	<	*/
359	<	public void testReadAfterWriteLock() throws InterruptedException {
360	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
361	<	lock.writeLock().lock();
362	<	Thread t1 = new Thread(new Runnable() {
363	<	public void run() {
364	<	lock.readLock().lock();
365	<	lock.readLock().unlock();
366	<	}
367	<	});
368	<	Thread t2 = new Thread(new Runnable() {
369	<	public void run() {
370	<	lock.readLock().lock();
371	<	lock.readLock().unlock();
372	<	}
373	<	});
374	<
375	<	t1.start();
376	<	t2.start();
377	<	Thread.sleep(SHORT_DELAY_MS);
378	<	lock.writeLock().unlock();
379	<	t1.join(MEDIUM_DELAY_MS);
380	<	t2.join(MEDIUM_DELAY_MS);
381	<	assertTrue(!t1.isAlive());
382	<	assertTrue(!t2.isAlive());
383	<	}
384	<
385	<	/**
386	<	* Read trylock succeeds if write locked by current thread
461	>	* A writelock succeeds only after a reading thread unlocks
462		*/
463	<	public void testReadHoldingWriteLock() {
464	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
465	<	lock.writeLock().lock();
466	<	assertTrue(lock.readLock().tryLock());
463	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
464	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
465	>	public void testWriteAfterReadLock(boolean fair) {
466	>	final PublicReentrantReadWriteLock lock =
467	>	new PublicReentrantReadWriteLock(fair);
468	>	lock.readLock().lock();
469	>	Thread t = newStartedThread(new CheckedRunnable() {
470	>	public void realRun() {
471	>	assertEquals(1, lock.getReadLockCount());
472	>	lock.writeLock().lock();
473	>	assertEquals(0, lock.getReadLockCount());
474	>	lock.writeLock().unlock();
475	>	}});
476	>	waitForQueuedThread(lock, t);
477	>	assertNotWriteLocked(lock);
478	>	assertEquals(1, lock.getReadLockCount());
479		lock.readLock().unlock();
480	<	lock.writeLock().unlock();
480	>	assertEquals(0, lock.getReadLockCount());
481	>	awaitTermination(t);
482	>	assertNotWriteLocked(lock);
483		}
484
485		/**
486	<	* Read lock succeeds if write locked by current thread even if
398	<	* other threads are waiting for readlock
486	>	* A writelock succeeds only after reading threads unlock
487		*/
488	<	public void testReadHoldingWriteLock2() throws InterruptedException {
489	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
490	<	lock.writeLock().lock();
491	<	Thread t1 = new Thread(new Runnable() {
492	<	public void run() {
405	<	lock.readLock().lock();
406	<	lock.readLock().unlock();
407	<	}
408	<	});
409	<	Thread t2 = new Thread(new Runnable() {
410	<	public void run() {
411	<	lock.readLock().lock();
412	<	lock.readLock().unlock();
413	<	}
414	<	});
415	<
416	<	t1.start();
417	<	t2.start();
488	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
489	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
490	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
491	>	final PublicReentrantReadWriteLock lock =
492	>	new PublicReentrantReadWriteLock(fair);
493		lock.readLock().lock();
419	–	lock.readLock().unlock();
420	–	Thread.sleep(SHORT_DELAY_MS);
494		lock.readLock().lock();
495	+	Thread t1 = newStartedThread(new CheckedRunnable() {
496	+	public void realRun() {
497	+	lock.readLock().lock();
498	+	assertEquals(3, lock.getReadLockCount());
499	+	lock.readLock().unlock();
500	+	}});
501	+	awaitTermination(t1);
502	+
503	+	Thread t2 = newStartedThread(new CheckedRunnable() {
504	+	public void realRun() {
505	+	assertEquals(2, lock.getReadLockCount());
506	+	lock.writeLock().lock();
507	+	assertEquals(0, lock.getReadLockCount());
508	+	lock.writeLock().unlock();
509	+	}});
510	+	waitForQueuedThread(lock, t2);
511	+	assertNotWriteLocked(lock);
512	+	assertEquals(2, lock.getReadLockCount());
513		lock.readLock().unlock();
514	<	lock.writeLock().unlock();
515	<	t1.join(MEDIUM_DELAY_MS);
516	<	t2.join(MEDIUM_DELAY_MS);
517	<	assertTrue(!t1.isAlive());
427	<	assertTrue(!t2.isAlive());
514	>	lock.readLock().unlock();
515	>	assertEquals(0, lock.getReadLockCount());
516	>	awaitTermination(t2);
517	>	assertNotWriteLocked(lock);
518		}
519
520		/**
521	<	*  Read lock succeeds if write locked by current thread even if
522	<	* other threads are waiting for writelock
521	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
522	>	* will block if there is a waiting writer thread
523		*/
524	<	public void testReadHoldingWriteLock3() throws InterruptedException {
525	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
526	<	lock.writeLock().lock();
527	<	Thread t1 = new Thread(new Runnable() {
438	<	public void run() {
439	<	lock.writeLock().lock();
440	<	lock.writeLock().unlock();
441	<	}
442	<	});
443	<	Thread t2 = new Thread(new Runnable() {
444	<	public void run() {
445	<	lock.writeLock().lock();
446	<	lock.writeLock().unlock();
447	<	}
448	<	});
524	>	public void testReaderWriterReaderFairFifo() {
525	>	final PublicReentrantReadWriteLock lock =
526	>	new PublicReentrantReadWriteLock(true);
527	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
528
450	–	t1.start();
451	–	t2.start();
529		lock.readLock().lock();
530	+	Thread t1 = newStartedThread(new CheckedRunnable() {
531	+	public void realRun() {
532	+	assertEquals(1, lock.getReadLockCount());
533	+	lock.writeLock().lock();
534	+	assertEquals(0, lock.getReadLockCount());
535	+	t1GotLock.set(true);
536	+	lock.writeLock().unlock();
537	+	}});
538	+	waitForQueuedThread(lock, t1);
539	+
540	+	Thread t2 = newStartedThread(new CheckedRunnable() {
541	+	public void realRun() {
542	+	assertEquals(1, lock.getReadLockCount());
543	+	lock.readLock().lock();
544	+	assertEquals(1, lock.getReadLockCount());
545	+	assertTrue(t1GotLock.get());
546	+	lock.readLock().unlock();
547	+	}});
548	+	waitForQueuedThread(lock, t2);
549	+	assertTrue(t1.isAlive());
550	+	assertNotWriteLocked(lock);
551	+	assertEquals(1, lock.getReadLockCount());
552		lock.readLock().unlock();
553	<	Thread.sleep(SHORT_DELAY_MS);
554	<	lock.readLock().lock();
555	<	lock.readLock().unlock();
457	<	lock.writeLock().unlock();
458	<	t1.join(MEDIUM_DELAY_MS);
459	<	t2.join(MEDIUM_DELAY_MS);
460	<	assertTrue(!t1.isAlive());
461	<	assertTrue(!t2.isAlive());
553	>	awaitTermination(t1);
554	>	awaitTermination(t2);
555	>	assertNotWriteLocked(lock);
556		}
557
558	+	/**
559	+	* Readlocks succeed only after a writing thread unlocks
560	+	*/
561	+	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
562	+	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
563	+	public void testReadAfterWriteLock(boolean fair) {
564	+	final PublicReentrantReadWriteLock lock =
565	+	new PublicReentrantReadWriteLock(fair);
566	+	lock.writeLock().lock();
567	+	Thread t1 = newStartedThread(new CheckedRunnable() {
568	+	public void realRun() {
569	+	lock.readLock().lock();
570	+	lock.readLock().unlock();
571	+	}});
572	+	Thread t2 = newStartedThread(new CheckedRunnable() {
573	+	public void realRun() {
574	+	lock.readLock().lock();
575	+	lock.readLock().unlock();
576	+	}});
577	+
578	+	waitForQueuedThread(lock, t1);
579	+	waitForQueuedThread(lock, t2);
580	+	releaseWriteLock(lock);
581	+	awaitTermination(t1);
582	+	awaitTermination(t2);
583	+	}
584
585		/**
586	<	*  Write lock succeeds if write locked by current thread even if
467	<	* other threads are waiting for writelock
586	>	* Read trylock succeeds if write locked by current thread
587		*/
588	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
589	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
590	<	lock.writeLock().lock();
591	<	Thread t1 = new Thread(new Runnable() {
473	<	public void run() {
474	<	lock.writeLock().lock();
475	<	lock.writeLock().unlock();
476	<	}
477	<	});
478	<	Thread t2 = new Thread(new Runnable() {
479	<	public void run() {
480	<	lock.writeLock().lock();
481	<	lock.writeLock().unlock();
482	<	}
483	<	});
484	<
485	<	t1.start();
486	<	t2.start();
588	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
589	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
590	>	public void testReadHoldingWriteLock(boolean fair) {
591	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
592		lock.writeLock().lock();
593	+	assertTrue(lock.readLock().tryLock());
594	+	lock.readLock().unlock();
595		lock.writeLock().unlock();
489	–	Thread.sleep(SHORT_DELAY_MS);
490	–	lock.writeLock().lock();
491	–	lock.writeLock().unlock();
492	–	lock.writeLock().unlock();
493	–	t1.join(MEDIUM_DELAY_MS);
494	–	t2.join(MEDIUM_DELAY_MS);
495	–	assertTrue(!t1.isAlive());
496	–	assertTrue(!t2.isAlive());
596		}
597
499	–
598		/**
599	<	* Fair Read trylock succeeds if write locked by current thread
599	>	* Read trylock succeeds (barging) even in the presence of waiting
600	>	* readers and/or writers
601		*/
602	<	public void testReadHoldingWriteLockFair() {
603	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
604	<	lock.writeLock().lock();
605	<	assertTrue(lock.readLock().tryLock());
602	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
603	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
604	>	public void testReadTryLockBarging(boolean fair) {
605	>	final PublicReentrantReadWriteLock lock =
606	>	new PublicReentrantReadWriteLock(fair);
607	>	lock.readLock().lock();
608	>
609	>	Thread t1 = newStartedThread(new CheckedRunnable() {
610	>	public void realRun() {
611	>	lock.writeLock().lock();
612	>	lock.writeLock().unlock();
613	>	}});
614	>
615	>	waitForQueuedThread(lock, t1);
616	>
617	>	Thread t2 = newStartedThread(new CheckedRunnable() {
618	>	public void realRun() {
619	>	lock.readLock().lock();
620	>	lock.readLock().unlock();
621	>	}});
622	>
623	>	if (fair)
624	>	waitForQueuedThread(lock, t2);
625	>
626	>	Thread t3 = newStartedThread(new CheckedRunnable() {
627	>	public void realRun() {
628	>	lock.readLock().tryLock();
629	>	lock.readLock().unlock();
630	>	}});
631	>
632	>	assertTrue(lock.getReadLockCount() > 0);
633	>	awaitTermination(t3);
634	>	assertTrue(t1.isAlive());
635	>	if (fair) assertTrue(t2.isAlive());
636		lock.readLock().unlock();
637	<	lock.writeLock().unlock();
637	>	awaitTermination(t1);
638	>	awaitTermination(t2);
639		}
640
641		/**
642	<	* Fair Read lock succeeds if write locked by current thread even if
642	>	* Read lock succeeds if write locked by current thread even if
643		* other threads are waiting for readlock
644		*/
645	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
646	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
647	<	lock.writeLock().lock();
648	<	Thread t1 = new Thread(new Runnable() {
649	<	public void run() {
650	<	lock.readLock().lock();
521	<	lock.readLock().unlock();
522	<	}
523	<	});
524	<	Thread t2 = new Thread(new Runnable() {
525	<	public void run() {
526	<	lock.readLock().lock();
527	<	lock.readLock().unlock();
528	<	}
529	<	});
530	<
531	<	t1.start();
532	<	t2.start();
645	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
646	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
647	>	public void testReadHoldingWriteLock2(boolean fair) {
648	>	final PublicReentrantReadWriteLock lock =
649	>	new PublicReentrantReadWriteLock(fair);
650	>	lock.writeLock().lock();
651		lock.readLock().lock();
652		lock.readLock().unlock();
653	<	Thread.sleep(SHORT_DELAY_MS);
653	>
654	>	Thread t1 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.readLock().lock();
657	>	lock.readLock().unlock();
658	>	}});
659	>	Thread t2 = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	lock.readLock().lock();
662	>	lock.readLock().unlock();
663	>	}});
664	>
665	>	waitForQueuedThread(lock, t1);
666	>	waitForQueuedThread(lock, t2);
667	>	assertWriteLockedByMoi(lock);
668		lock.readLock().lock();
669		lock.readLock().unlock();
670	<	lock.writeLock().unlock();
671	<	t1.join(MEDIUM_DELAY_MS);
672	<	t2.join(MEDIUM_DELAY_MS);
541	<	assertTrue(!t1.isAlive());
542	<	assertTrue(!t2.isAlive());
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673		}
674
545	–
675		/**
676	<	* Fair Read lock succeeds if write locked by current thread even if
676	>	* Read lock succeeds if write locked by current thread even if
677		* other threads are waiting for writelock
678		*/
679	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
680	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
681	<	lock.writeLock().lock();
682	<	Thread t1 = new Thread(new Runnable() {
683	<	public void run() {
684	<	lock.writeLock().lock();
556	<	lock.writeLock().unlock();
557	<	}
558	<	});
559	<	Thread t2 = new Thread(new Runnable() {
560	<	public void run() {
561	<	lock.writeLock().lock();
562	<	lock.writeLock().unlock();
563	<	}
564	<	});
565	<
566	<	t1.start();
567	<	t2.start();
679	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
680	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
681	>	public void testReadHoldingWriteLock3(boolean fair) {
682	>	final PublicReentrantReadWriteLock lock =
683	>	new PublicReentrantReadWriteLock(fair);
684	>	lock.writeLock().lock();
685		lock.readLock().lock();
686		lock.readLock().unlock();
687	<	Thread.sleep(SHORT_DELAY_MS);
687	>
688	>	Thread t1 = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() {
690	>	lock.writeLock().lock();
691	>	lock.writeLock().unlock();
692	>	}});
693	>	Thread t2 = newStartedThread(new CheckedRunnable() {
694	>	public void realRun() {
695	>	lock.writeLock().lock();
696	>	lock.writeLock().unlock();
697	>	}});
698	>
699	>	waitForQueuedThread(lock, t1);
700	>	waitForQueuedThread(lock, t2);
701	>	assertWriteLockedByMoi(lock);
702		lock.readLock().lock();
703		lock.readLock().unlock();
704	+	assertWriteLockedByMoi(lock);
705		lock.writeLock().unlock();
706	<	t1.join(MEDIUM_DELAY_MS);
707	<	t2.join(MEDIUM_DELAY_MS);
576	<	assertTrue(!t1.isAlive());
577	<	assertTrue(!t2.isAlive());
706	>	awaitTermination(t1);
707	>	awaitTermination(t2);
708		}
709
580	–
710		/**
711	<	* Fair Write lock succeeds if write locked by current thread even if
711	>	* Write lock succeeds if write locked by current thread even if
712		* other threads are waiting for writelock
713		*/
714	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
715	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
716	<	lock.writeLock().lock();
717	<	Thread t1 = new Thread(new Runnable() {
718	<	public void run() {
719	<	lock.writeLock().lock();
591	<	lock.writeLock().unlock();
592	<	}
593	<	});
594	<	Thread t2 = new Thread(new Runnable() {
595	<	public void run() {
596	<	lock.writeLock().lock();
597	<	lock.writeLock().unlock();
598	<	}
599	<	});
600	<
601	<	t1.start();
602	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	assertTrue(lock.isWriteLockedByCurrentThread());
605	<	assertTrue(lock.getWriteHoldCount() == 1);
714	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
715	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
716	>	public void testWriteHoldingWriteLock4(boolean fair) {
717	>	final PublicReentrantReadWriteLock lock =
718	>	new PublicReentrantReadWriteLock(fair);
719	>	lock.writeLock().lock();
720		lock.writeLock().lock();
607	–	assertTrue(lock.getWriteHoldCount() == 2);
721		lock.writeLock().unlock();
722	+
723	+	Thread t1 = newStartedThread(new CheckedRunnable() {
724	+	public void realRun() {
725	+	lock.writeLock().lock();
726	+	lock.writeLock().unlock();
727	+	}});
728	+	Thread t2 = newStartedThread(new CheckedRunnable() {
729	+	public void realRun() {
730	+	lock.writeLock().lock();
731	+	lock.writeLock().unlock();
732	+	}});
733	+
734	+	waitForQueuedThread(lock, t1);
735	+	waitForQueuedThread(lock, t2);
736	+	assertWriteLockedByMoi(lock);
737	+	assertEquals(1, lock.getWriteHoldCount());
738		lock.writeLock().lock();
739	+	assertWriteLockedByMoi(lock);
740	+	assertEquals(2, lock.getWriteHoldCount());
741		lock.writeLock().unlock();
742	+	assertWriteLockedByMoi(lock);
743	+	assertEquals(1, lock.getWriteHoldCount());
744		lock.writeLock().unlock();
745	<	t1.join(MEDIUM_DELAY_MS);
746	<	t2.join(MEDIUM_DELAY_MS);
614	<	assertTrue(!t1.isAlive());
615	<	assertTrue(!t2.isAlive());
745	>	awaitTermination(t1);
746	>	awaitTermination(t2);
747		}
748
618	–
749		/**
750		* Read tryLock succeeds if readlocked but not writelocked
751		*/
752	<	public void testTryLockWhenReadLocked() throws InterruptedException {
753	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
754	<	lock.readLock().lock();
755	<	Thread t = new Thread(new Runnable() {
756	<	public void run() {
757	<	threadAssertTrue(lock.readLock().tryLock());
758	<	lock.readLock().unlock();
759	<	}
760	<	});
752	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
753	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
754	>	public void testTryLockWhenReadLocked(boolean fair) {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
756	>	lock.readLock().lock();
757	>	Thread t = newStartedThread(new CheckedRunnable() {
758	>	public void realRun() {
759	>	assertTrue(lock.readLock().tryLock());
760	>	lock.readLock().unlock();
761	>	}});
762
763	<	t.start();
633	<	t.join();
763	>	awaitTermination(t);
764		lock.readLock().unlock();
765		}
766
637	–
638	–
767		/**
768		* write tryLock fails when readlocked
769		*/
770	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
772	<	lock.readLock().lock();
773	<	Thread t = new Thread(new Runnable() {
774	<	public void run() {
775	<	threadAssertFalse(lock.writeLock().tryLock());
776	<	}
777	<	});
770	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
771	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
772	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
774	>	lock.readLock().lock();
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776	>	public void realRun() {
777	>	assertFalse(lock.writeLock().tryLock());
778	>	}});
779
780	<	t.start();
652	<	t.join();
780	>	awaitTermination(t);
781		lock.readLock().unlock();
782		}
783
656	–
784		/**
785	<	* Fair Read tryLock succeeds if readlocked but not writelocked
785	>	* write timed tryLock times out if locked
786		*/
787	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
788	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
789	<	lock.readLock().lock();
790	<	Thread t = new Thread(new Runnable() {
791	<	public void run() {
792	<	threadAssertTrue(lock.readLock().tryLock());
793	<	lock.readLock().unlock();
794	<	}
795	<	});
787	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
788	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
789	>	public void testWriteTryLock_Timeout(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792	>	final long timeoutMillis = timeoutMillis();
793	>	lock.writeLock().lock();
794	>	Thread t = newStartedThread(new CheckedRunnable() {
795	>	public void realRun() throws InterruptedException {
796	>	long startTime = System.nanoTime();
797	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
798	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
799	>	}});
800
801	<	t.start();
802	<	t.join();
672	<	lock.readLock().unlock();
801	>	awaitTermination(t);
802	>	releaseWriteLock(lock);
803		}
804
675	–
676	–
805		/**
806	<	* Fair write tryLock fails when readlocked
806	>	* read timed tryLock times out if write-locked
807		*/
808	<	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
810	<	lock.readLock().lock();
811	<	Thread t = new Thread(new Runnable() {
812	<	public void run() {
813	<	threadAssertFalse(lock.writeLock().tryLock());
814	<	}
815	<	});
808	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
809	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
810	>	public void testReadTryLock_Timeout(boolean fair) {
811	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
812	>	lock.writeLock().lock();
813	>	Thread t = newStartedThread(new CheckedRunnable() {
814	>	public void realRun() throws InterruptedException {
815	>	long startTime = System.nanoTime();
816	>	long timeoutMillis = timeoutMillis();
817	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
818	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
819	>	}});
820
821	<	t.start();
822	<	t.join();
823	<	lock.readLock().unlock();
821	>	awaitTermination(t);
822	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
823	>	lock.writeLock().unlock();
824		}
825
694	–
695	–
826		/**
827	<	* write timed tryLock times out if locked
827	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
828		*/
829	<	public void testWriteTryLock_Timeout() throws InterruptedException {
830	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831	<	lock.writeLock().lock();
832	<	Thread t = new Thread(new Runnable() {
833	<	public void run() {
834	<	try {
835	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
836	<	} catch (Exception ex) {
837	<	threadUnexpectedException();
838	<	}
839	<	}
840	<	});
829	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
830	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
831	>	public void testWriteLockInterruptibly(boolean fair) {
832	>	final PublicReentrantReadWriteLock lock =
833	>	new PublicReentrantReadWriteLock(fair);
834	>	try {
835	>	lock.writeLock().lockInterruptibly();
836	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
837	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
838	>	public void realRun() throws InterruptedException {
839	>	lock.writeLock().lockInterruptibly();
840	>	}});
841
842	<	t.start();
843	<	t.join();
844	<	lock.writeLock().unlock();
842	>	waitForQueuedThread(lock, t);
843	>	t.interrupt();
844	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
845	>	awaitTermination(t);
846	>	releaseWriteLock(lock);
847		}
848
849		/**
850	<	* read timed tryLock times out if write-locked
850	>	* read lockInterruptibly succeeds if lock free else is interruptible
851		*/
852	<	public void testReadTryLock_Timeout() throws InterruptedException {
853	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
854	<	lock.writeLock().lock();
855	<	Thread t = new Thread(new Runnable() {
856	<	public void run() {
857	<	try {
858	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
859	<	} catch (Exception ex) {
860	<	threadUnexpectedException();
861	<	}
862	<	}
863	<	});
864	<
865	<	t.start();
734	<	t.join();
735	<	lock.writeLock().unlock();
736	<	}
737	<
738	<
739	<	/**
740	<	* write lockInterruptibly succeeds if lock free else is interruptible
741	<	*/
742	<	public void testWriteLockInterruptibly() throws InterruptedException {
743	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
744	<	lock.writeLock().lockInterruptibly();
745	<	Thread t = new Thread(new Runnable() {
746	<	public void run() {
747	<	try {
748	<	lock.writeLock().lockInterruptibly();
749	<	threadShouldThrow();
750	<	}
751	<	catch (InterruptedException success) {
752	<	}
753	<	}
754	<	});
852	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
853	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
854	>	public void testReadLockInterruptibly(boolean fair) {
855	>	final PublicReentrantReadWriteLock lock =
856	>	new PublicReentrantReadWriteLock(fair);
857	>	try {
858	>	lock.readLock().lockInterruptibly();
859	>	lock.readLock().unlock();
860	>	lock.writeLock().lockInterruptibly();
861	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
862	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
863	>	public void realRun() throws InterruptedException {
864	>	lock.readLock().lockInterruptibly();
865	>	}});
866
867	<	t.start();
757	<	Thread.sleep(SHORT_DELAY_MS);
867	>	waitForQueuedThread(lock, t);
868		t.interrupt();
869	<	Thread.sleep(SHORT_DELAY_MS);
870	<	t.join();
761	<	lock.writeLock().unlock();
869	>	awaitTermination(t);
870	>	releaseWriteLock(lock);
871		}
872
873		/**
874	<	*  read lockInterruptibly succeeds if lock free else is interruptible
874	>	* Calling await without holding lock throws IllegalMonitorStateException
875		*/
876	<	public void testReadLockInterruptibly() throws InterruptedException {
877	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
878	<	lock.writeLock().lockInterruptibly();
879	<	Thread t = new Thread(new Runnable() {
880	<	public void run() {
881	<	try {
882	<	lock.readLock().lockInterruptibly();
883	<	threadShouldThrow();
884	<	}
885	<	catch (InterruptedException success) {
886	<	}
887	<	}
888	<	});
889	<
890	<	t.start();
891	<	Thread.sleep(SHORT_DELAY_MS);
783	<	t.interrupt();
784	<	t.join();
785	<	lock.writeLock().unlock();
876	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
877	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
878	>	public void testAwait_IMSE(boolean fair) {
879	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
880	>	final Condition c = lock.writeLock().newCondition();
881	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
882	>	long startTime = System.nanoTime();
883	>	try {
884	>	await(c, awaitMethod);
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {
887	>	} catch (InterruptedException fail) {
888	>	threadUnexpectedException(fail);
889	>	}
890	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
891	>	}
892		}
893
894		/**
895	<	* Calling await without holding lock throws IllegalMonitorStateException
895	>	* Calling signal without holding lock throws IllegalMonitorStateException
896		*/
897	<	public void testAwait_IllegalMonitor() throws InterruptedException {
898	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
897	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
898	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
899	>	public void testSignal_IMSE(boolean fair) {
900	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
901		final Condition c = lock.writeLock().newCondition();
902		try {
903	<	c.await();
903	>	c.signal();
904		shouldThrow();
905		} catch (IllegalMonitorStateException success) {}
906		}
907
908		/**
909	<	* Calling signal without holding lock throws IllegalMonitorStateException
909	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
910		*/
911	<	public void testSignal_IllegalMonitor() {
912	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
911	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
912	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
913	>	public void testSignalAll_IMSE(boolean fair) {
914	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
915		final Condition c = lock.writeLock().newCondition();
916		try {
917	<	c.signal();
917	>	c.signalAll();
918		shouldThrow();
919		} catch (IllegalMonitorStateException success) {}
920		}
#	Line 812 | Line 922 | public class ReentrantReadWriteLockTest
922		/**
923		* awaitNanos without a signal times out
924		*/
925	<	public void testAwaitNanos_Timeout() throws InterruptedException {
926	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
925	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
926	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
927	>	public void testAwaitNanos_Timeout(boolean fair) {
928	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
929		final Condition c = lock.writeLock().newCondition();
930	<
930	>	final long timeoutMillis = timeoutMillis();
931		lock.writeLock().lock();
932	<	long t = c.awaitNanos(100);
933	<	assertTrue(t <= 0);
932	>	final long startTime = System.nanoTime();
933	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
934	>	try {
935	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	>	assertTrue(nanosRemaining <= 0);
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
939		lock.writeLock().unlock();
940		}
941
825	–
942		/**
943	<	*  timed await without a signal times out
943	>	* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
945	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
946	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
947	>	public void testAwait_Timeout(boolean fair) {
948	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
949		final Condition c = lock.writeLock().newCondition();
950	+	final long timeoutMillis = timeoutMillis();
951		lock.writeLock().lock();
952	+	final long startTime = System.nanoTime();
953	+	try {
954	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
955	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
956	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957		lock.writeLock().unlock();
958		}
959
960		/**
961		* awaitUntil without a signal times out
962		*/
963	<	public void testAwaitUntil_Timeout() {
964	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
963	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
964	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
965	>	public void testAwaitUntil_Timeout(boolean fair) {
966	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
967		final Condition c = lock.writeLock().newCondition();
968		lock.writeLock().lock();
969	<	java.util.Date d = new java.util.Date();
969	>	// We shouldn't assume that nanoTime and currentTimeMillis
970	>	// use the same time source, so don't use nanoTime here.
971	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
972	>	try {
973	>	assertFalse(c.awaitUntil(delayedDate));
974	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
975	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
976		lock.writeLock().unlock();
977		}
978
979		/**
980		* await returns when signalled
981		*/
982	<	public void testAwait() throws InterruptedException {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
982	>	public void testAwait()      { testAwait(false); }
983	>	public void testAwait_fair() { testAwait(true); }
984	>	public void testAwait(boolean fair) {
985	>	final PublicReentrantReadWriteLock lock =
986	>	new PublicReentrantReadWriteLock(fair);
987		final Condition c = lock.writeLock().newCondition();
988	<	Thread t = new Thread(new Runnable() {
989	<	public void run() {
990	<	try {
991	<	lock.writeLock().lock();
992	<	c.await();
993	<	lock.writeLock().unlock();
994	<	}
995	<	catch (InterruptedException e) {
861	<	threadUnexpectedException();
862	<	}
863	<	}
864	<	});
988	>	final CountDownLatch locked = new CountDownLatch(1);
989	>	Thread t = newStartedThread(new CheckedRunnable() {
990	>	public void realRun() throws InterruptedException {
991	>	lock.writeLock().lock();
992	>	locked.countDown();
993	>	c.await();
994	>	lock.writeLock().unlock();
995	>	}});
996
997	<	t.start();
867	<	Thread.sleep(SHORT_DELAY_MS);
997	>	await(locked);
998		lock.writeLock().lock();
999	+	assertHasWaiters(lock, c, t);
1000		c.signal();
1001	+	assertHasNoWaiters(lock, c);
1002	+	assertTrue(t.isAlive());
1003		lock.writeLock().unlock();
1004	<	t.join(SHORT_DELAY_MS);
872	<	assertFalse(t.isAlive());
873	<	}
874	<
875	<	/** A helper class for uninterruptible wait tests */
876	<	class UninterruptableThread extends Thread {
877	<	private Lock lock;
878	<	private Condition c;
879	<
880	<	public volatile boolean canAwake = false;
881	<	public volatile boolean interrupted = false;
882	<	public volatile boolean lockStarted = false;
883	<
884	<	public UninterruptableThread(Lock lock, Condition c) {
885	<	this.lock = lock;
886	<	this.c = c;
887	<	}
888	<
889	<	public synchronized void run() {
890	<	lock.lock();
891	<	lockStarted = true;
892	<
893	<	while (!canAwake) {
894	<	c.awaitUninterruptibly();
895	<	}
896	<
897	<	interrupted = isInterrupted();
898	<	lock.unlock();
899	<	}
900	<	}
901	<
902	<	/**
903	<	* awaitUninterruptibly doesn't abort on interrupt
904	<	*/
905	<	public void testAwaitUninterruptibly() throws InterruptedException {
906	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
907	<	final Condition c = lock.writeLock().newCondition();
908	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
909	<
910	<	thread.start();
911	<
912	<	while (!thread.lockStarted) {
913	<	Thread.sleep(100);
914	<	}
915	<
916	<	lock.writeLock().lock();
917	<	try {
918	<	thread.interrupt();
919	<	thread.canAwake = true;
920	<	c.signal();
921	<	} finally {
922	<	lock.writeLock().unlock();
923	<	}
924	<
925	<	thread.join();
926	<	assertTrue(thread.interrupted);
927	<	assertFalse(thread.isAlive());
1004	>	awaitTermination(t);
1005		}
1006
1007		/**
1008	<	* await is interruptible
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010	<	public void testAwait_Interrupt() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1014	>	final Condition condition = lock.newCondition();
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016	>
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	condition.awaitUninterruptibly();
1024	>	assertTrue(Thread.interrupted());
1025	>	lock.unlock();
1026	>	}});
1027	>
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.lock();
1032	>	pleaseInterrupt.countDown();
1033	>	condition.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.unlock();
1036	>	}});
1037	>
1038	>	await(pleaseInterrupt);
1039	>	t2.interrupt();
1040	>	lock.lock();
1041	>	lock.unlock();
1042	>	assertThreadBlocks(t1, Thread.State.WAITING);
1043	>	assertThreadBlocks(t2, Thread.State.WAITING);
1044	>
1045	>	lock.lock();
1046	>	condition.signalAll();
1047	>	lock.unlock();
1048	>
1049	>	awaitTermination(t1);
1050	>	awaitTermination(t2);
1051	>	}
1052	>
1053	>	/**
1054	>	* await/awaitNanos/awaitUntil is interruptible
1055	>	*/
1056	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1057	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1058	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1059	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1061	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1063	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1065	>	final PublicReentrantReadWriteLock lock =
1066	>	new PublicReentrantReadWriteLock(fair);
1067		final Condition c = lock.writeLock().newCondition();
1068	<	Thread t = new Thread(new Runnable() {
1069	<	public void run() {
1070	<	try {
1071	<	lock.writeLock().lock();
1072	<	c.await();
1073	<	lock.writeLock().unlock();
1074	<	threadShouldThrow();
1075	<	}
1076	<	catch (InterruptedException success) {
1077	<	}
1078	<	}
1079	<	});
1068	>	final CountDownLatch locked = new CountDownLatch(1);
1069	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1070	>	public void realRun() throws InterruptedException {
1071	>	lock.writeLock().lock();
1072	>	assertWriteLockedByMoi(lock);
1073	>	assertHasNoWaiters(lock, c);
1074	>	locked.countDown();
1075	>	try {
1076	>	await(c, awaitMethod);
1077	>	} finally {
1078	>	assertWriteLockedByMoi(lock);
1079	>	assertHasNoWaiters(lock, c);
1080	>	lock.writeLock().unlock();
1081	>	assertFalse(Thread.interrupted());
1082	>	}
1083	>	}});
1084
1085	<	t.start();
1086	<	Thread.sleep(SHORT_DELAY_MS);
1085	>	await(locked);
1086	>	assertHasWaiters(lock, c, t);
1087		t.interrupt();
1088	<	t.join(SHORT_DELAY_MS);
1089	<	assertFalse(t.isAlive());
1088	>	awaitTermination(t);
1089	>	assertNotWriteLocked(lock);
1090		}
1091
1092		/**
1093	<	* awaitNanos is interruptible
1093	>	* signalAll wakes up all threads
1094		*/
1095	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1096	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1095	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1096	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1097	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1098	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1100	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1102	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1104	>	final PublicReentrantReadWriteLock lock =
1105	>	new PublicReentrantReadWriteLock(fair);
1106		final Condition c = lock.writeLock().newCondition();
1107	<	Thread t = new Thread(new Runnable() {
1108	<	public void run() {
1109	<	try {
1110	<	lock.writeLock().lock();
1111	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1112	<	lock.writeLock().unlock();
1113	<	threadShouldThrow();
1114	<	}
1115	<	catch (InterruptedException success) {
1116	<	}
972	<	}
973	<	});
1107	>	final CountDownLatch locked = new CountDownLatch(2);
1108	>	final Lock writeLock = lock.writeLock();
1109	>	class Awaiter extends CheckedRunnable {
1110	>	public void realRun() throws InterruptedException {
1111	>	writeLock.lock();
1112	>	locked.countDown();
1113	>	await(c, awaitMethod);
1114	>	writeLock.unlock();
1115	>	}
1116	>	}
1117
1118	<	t.start();
1119	<	Thread.sleep(SHORT_DELAY_MS);
1120	<	t.interrupt();
1121	<	t.join(SHORT_DELAY_MS);
1122	<	assertFalse(t.isAlive());
1118	>	Thread t1 = newStartedThread(new Awaiter());
1119	>	Thread t2 = newStartedThread(new Awaiter());
1120	>
1121	>	await(locked);
1122	>	writeLock.lock();
1123	>	assertHasWaiters(lock, c, t1, t2);
1124	>	c.signalAll();
1125	>	assertHasNoWaiters(lock, c);
1126	>	writeLock.unlock();
1127	>	awaitTermination(t1);
1128	>	awaitTermination(t2);
1129		}
1130
1131		/**
1132	<	* awaitUntil is interruptible
1132	>	* signal wakes up waiting threads in FIFO order
1133		*/
1134	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1135	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1134	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1135	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1136	>	public void testSignalWakesFifo(boolean fair) {
1137	>	final PublicReentrantReadWriteLock lock =
1138	>	new PublicReentrantReadWriteLock(fair);
1139		final Condition c = lock.writeLock().newCondition();
1140	<	Thread t = new Thread(new Runnable() {
1141	<	public void run() {
1142	<	try {
1143	<	lock.writeLock().lock();
1144	<	java.util.Date d = new java.util.Date();
1145	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1146	<	lock.writeLock().unlock();
1147	<	threadShouldThrow();
1148	<	}
1149	<	catch (InterruptedException success) {
1150	<	}
1151	<	}
1152	<	});
1140	>	final CountDownLatch locked1 = new CountDownLatch(1);
1141	>	final CountDownLatch locked2 = new CountDownLatch(1);
1142	>	final Lock writeLock = lock.writeLock();
1143	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1144	>	public void realRun() throws InterruptedException {
1145	>	writeLock.lock();
1146	>	locked1.countDown();
1147	>	c.await();
1148	>	writeLock.unlock();
1149	>	}});
1150	>
1151	>	await(locked1);
1152	>
1153	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1154	>	public void realRun() throws InterruptedException {
1155	>	writeLock.lock();
1156	>	locked2.countDown();
1157	>	c.await();
1158	>	writeLock.unlock();
1159	>	}});
1160
1161	<	t.start();
1162	<	Thread.sleep(SHORT_DELAY_MS);
1163	<	t.interrupt();
1164	<	t.join(SHORT_DELAY_MS);
1165	<	assertFalse(t.isAlive());
1161	>	await(locked2);
1162	>
1163	>	writeLock.lock();
1164	>	assertHasWaiters(lock, c, t1, t2);
1165	>	assertFalse(lock.hasQueuedThreads());
1166	>	c.signal();
1167	>	assertHasWaiters(lock, c, t2);
1168	>	assertTrue(lock.hasQueuedThread(t1));
1169	>	assertFalse(lock.hasQueuedThread(t2));
1170	>	c.signal();
1171	>	assertHasNoWaiters(lock, c);
1172	>	assertTrue(lock.hasQueuedThread(t1));
1173	>	assertTrue(lock.hasQueuedThread(t2));
1174	>	writeLock.unlock();
1175	>	awaitTermination(t1);
1176	>	awaitTermination(t2);
1177		}
1178
1179		/**
1180	<	* signalAll wakes up all threads
1181	<	*/
1182	<	public void testSignalAll() throws InterruptedException {
1183	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1180	>	* await after multiple reentrant locking preserves lock count
1181	>	*/
1182	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1183	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1184	>	public void testAwaitLockCount(boolean fair) {
1185	>	final PublicReentrantReadWriteLock lock =
1186	>	new PublicReentrantReadWriteLock(fair);
1187		final Condition c = lock.writeLock().newCondition();
1188	<	Thread t1 = new Thread(new Runnable() {
1189	<	public void run() {
1190	<	try {
1191	<	lock.writeLock().lock();
1192	<	c.await();
1193	<	lock.writeLock().unlock();
1194	<	}
1195	<	catch (InterruptedException e) {
1196	<	threadUnexpectedException();
1197	<	}
1198	<	}
1199	<	});
1200	<
1201	<	Thread t2 = new Thread(new Runnable() {
1202	<	public void run() {
1203	<	try {
1204	<	lock.writeLock().lock();
1205	<	c.await();
1206	<	lock.writeLock().unlock();
1207	<	}
1208	<	catch (InterruptedException e) {
1209	<	threadUnexpectedException();
1210	<	}
1211	<	}
1212	<	});
1188	>	final CountDownLatch locked = new CountDownLatch(2);
1189	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1190	>	public void realRun() throws InterruptedException {
1191	>	lock.writeLock().lock();
1192	>	assertWriteLockedByMoi(lock);
1193	>	assertEquals(1, lock.writeLock().getHoldCount());
1194	>	locked.countDown();
1195	>	c.await();
1196	>	assertWriteLockedByMoi(lock);
1197	>	assertEquals(1, lock.writeLock().getHoldCount());
1198	>	lock.writeLock().unlock();
1199	>	}});
1200	>
1201	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1202	>	public void realRun() throws InterruptedException {
1203	>	lock.writeLock().lock();
1204	>	lock.writeLock().lock();
1205	>	assertWriteLockedByMoi(lock);
1206	>	assertEquals(2, lock.writeLock().getHoldCount());
1207	>	locked.countDown();
1208	>	c.await();
1209	>	assertWriteLockedByMoi(lock);
1210	>	assertEquals(2, lock.writeLock().getHoldCount());
1211	>	lock.writeLock().unlock();
1212	>	lock.writeLock().unlock();
1213	>	}});
1214
1215	<	t1.start();
1042	<	t2.start();
1043	<	Thread.sleep(SHORT_DELAY_MS);
1215	>	await(locked);
1216		lock.writeLock().lock();
1217	+	assertHasWaiters(lock, c, t1, t2);
1218		c.signalAll();
1219	+	assertHasNoWaiters(lock, c);
1220		lock.writeLock().unlock();
1221	<	t1.join(SHORT_DELAY_MS);
1222	<	t2.join(SHORT_DELAY_MS);
1049	<	assertFalse(t1.isAlive());
1050	<	assertFalse(t2.isAlive());
1221	>	awaitTermination(t1);
1222	>	awaitTermination(t2);
1223		}
1224
1225		/**
1226		* A serialized lock deserializes as unlocked
1227		*/
1228	<	public void testSerialization() throws Exception {
1229	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1230	<	l.readLock().lock();
1231	<	l.readLock().unlock();
1232	<
1233	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1234	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1235	<	out.writeObject(l);
1236	<	out.close();
1237	<
1238	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1239	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1240	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1241	<	r.readLock().lock();
1242	<	r.readLock().unlock();
1228	>	public void testSerialization()      { testSerialization(false); }
1229	>	public void testSerialization_fair() { testSerialization(true); }
1230	>	public void testSerialization(boolean fair) {
1231	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1232	>	lock.writeLock().lock();
1233	>	lock.readLock().lock();
1234	>
1235	>	ReentrantReadWriteLock clone = serialClone(lock);
1236	>	assertEquals(lock.isFair(), clone.isFair());
1237	>	assertTrue(lock.isWriteLocked());
1238	>	assertFalse(clone.isWriteLocked());
1239	>	assertEquals(1, lock.getReadLockCount());
1240	>	assertEquals(0, clone.getReadLockCount());
1241	>	clone.writeLock().lock();
1242	>	clone.readLock().lock();
1243	>	assertTrue(clone.isWriteLocked());
1244	>	assertEquals(1, clone.getReadLockCount());
1245	>	clone.readLock().unlock();
1246	>	clone.writeLock().unlock();
1247	>	assertFalse(clone.isWriteLocked());
1248	>	assertEquals(1, lock.getReadLockCount());
1249	>	assertEquals(0, clone.getReadLockCount());
1250		}
1251
1252		/**
1253		* hasQueuedThreads reports whether there are waiting threads
1254		*/
1255	<	public void testhasQueuedThreads() throws InterruptedException {
1256	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1255	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1256	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1257	>	public void testHasQueuedThreads(boolean fair) {
1258	>	final PublicReentrantReadWriteLock lock =
1259	>	new PublicReentrantReadWriteLock(fair);
1260		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262		assertFalse(lock.hasQueuedThreads());
1263		lock.writeLock().lock();
1264	+	assertFalse(lock.hasQueuedThreads());
1265		t1.start();
1266	<	Thread.sleep(SHORT_DELAY_MS);
1266	>	waitForQueuedThread(lock, t1);
1267		assertTrue(lock.hasQueuedThreads());
1268		t2.start();
1269	<	Thread.sleep(SHORT_DELAY_MS);
1269	>	waitForQueuedThread(lock, t2);
1270		assertTrue(lock.hasQueuedThreads());
1271		t1.interrupt();
1272	<	Thread.sleep(SHORT_DELAY_MS);
1272	>	awaitTermination(t1);
1273		assertTrue(lock.hasQueuedThreads());
1274		lock.writeLock().unlock();
1275	<	Thread.sleep(SHORT_DELAY_MS);
1275	>	awaitTermination(t2);
1276		assertFalse(lock.hasQueuedThreads());
1094	–	t1.join();
1095	–	t2.join();
1277		}
1278
1279		/**
1280		* hasQueuedThread(null) throws NPE
1281		*/
1282	<	public void testHasQueuedThreadNPE() {
1283	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1282	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1283	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1284	>	public void testHasQueuedThreadNPE(boolean fair) {
1285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1286		try {
1287	<	sync.hasQueuedThread(null);
1287	>	lock.hasQueuedThread(null);
1288		shouldThrow();
1289	<	} catch (NullPointerException success) {
1107	<	}
1289	>	} catch (NullPointerException success) {}
1290		}
1291
1292		/**
1293	<	* hasQueuedThread reports whether a thread is queued.
1293	>	* hasQueuedThread reports whether a thread is queued
1294		*/
1295	<	public void testHasQueuedThread() throws InterruptedException {
1296	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1297	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1298	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1299	<	assertFalse(sync.hasQueuedThread(t1));
1300	<	assertFalse(sync.hasQueuedThread(t2));
1301	<	sync.writeLock().lock();
1295	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1296	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1297	>	public void testHasQueuedThread(boolean fair) {
1298	>	final PublicReentrantReadWriteLock lock =
1299	>	new PublicReentrantReadWriteLock(fair);
1300	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1301	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1302	>	assertFalse(lock.hasQueuedThread(t1));
1303	>	assertFalse(lock.hasQueuedThread(t2));
1304	>	lock.writeLock().lock();
1305		t1.start();
1306	<	Thread.sleep(SHORT_DELAY_MS);
1307	<	assertTrue(sync.hasQueuedThread(t1));
1306	>	waitForQueuedThread(lock, t1);
1307	>	assertTrue(lock.hasQueuedThread(t1));
1308	>	assertFalse(lock.hasQueuedThread(t2));
1309		t2.start();
1310	<	Thread.sleep(SHORT_DELAY_MS);
1311	<	assertTrue(sync.hasQueuedThread(t1));
1312	<	assertTrue(sync.hasQueuedThread(t2));
1310	>	waitForQueuedThread(lock, t2);
1311	>	assertTrue(lock.hasQueuedThread(t1));
1312	>	assertTrue(lock.hasQueuedThread(t2));
1313		t1.interrupt();
1314	<	Thread.sleep(SHORT_DELAY_MS);
1315	<	assertFalse(sync.hasQueuedThread(t1));
1316	<	assertTrue(sync.hasQueuedThread(t2));
1317	<	sync.writeLock().unlock();
1318	<	Thread.sleep(SHORT_DELAY_MS);
1319	<	assertFalse(sync.hasQueuedThread(t1));
1320	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	assertFalse(sync.hasQueuedThread(t2));
1136	<	t1.join();
1137	<	t2.join();
1314	>	awaitTermination(t1);
1315	>	assertFalse(lock.hasQueuedThread(t1));
1316	>	assertTrue(lock.hasQueuedThread(t2));
1317	>	lock.writeLock().unlock();
1318	>	awaitTermination(t2);
1319	>	assertFalse(lock.hasQueuedThread(t1));
1320	>	assertFalse(lock.hasQueuedThread(t2));
1321		}
1322
1140	–
1323		/**
1324		* getQueueLength reports number of waiting threads
1325		*/
1326	<	public void testGetQueueLength() throws InterruptedException {
1327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1326	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1327	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1328	>	public void testGetQueueLength(boolean fair) {
1329	>	final PublicReentrantReadWriteLock lock =
1330	>	new PublicReentrantReadWriteLock(fair);
1331		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1332		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1333		assertEquals(0, lock.getQueueLength());
1334		lock.writeLock().lock();
1335		t1.start();
1336	<	Thread.sleep(SHORT_DELAY_MS);
1336	>	waitForQueuedThread(lock, t1);
1337		assertEquals(1, lock.getQueueLength());
1338		t2.start();
1339	<	Thread.sleep(SHORT_DELAY_MS);
1339	>	waitForQueuedThread(lock, t2);
1340		assertEquals(2, lock.getQueueLength());
1341		t1.interrupt();
1342	<	Thread.sleep(SHORT_DELAY_MS);
1342	>	awaitTermination(t1);
1343		assertEquals(1, lock.getQueueLength());
1344		lock.writeLock().unlock();
1345	<	Thread.sleep(SHORT_DELAY_MS);
1345	>	awaitTermination(t2);
1346		assertEquals(0, lock.getQueueLength());
1162	–	t1.join();
1163	–	t2.join();
1347		}
1348
1349		/**
1350		* getQueuedThreads includes waiting threads
1351		*/
1352	<	public void testGetQueuedThreads() throws InterruptedException {
1353	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1352	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1353	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1354	>	public void testGetQueuedThreads(boolean fair) {
1355	>	final PublicReentrantReadWriteLock lock =
1356	>	new PublicReentrantReadWriteLock(fair);
1357		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1358		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1359		assertTrue(lock.getQueuedThreads().isEmpty());
1360		lock.writeLock().lock();
1361		assertTrue(lock.getQueuedThreads().isEmpty());
1362		t1.start();
1363	<	Thread.sleep(SHORT_DELAY_MS);
1363	>	waitForQueuedThread(lock, t1);
1364	>	assertEquals(1, lock.getQueuedThreads().size());
1365		assertTrue(lock.getQueuedThreads().contains(t1));
1366		t2.start();
1367	<	Thread.sleep(SHORT_DELAY_MS);
1367	>	waitForQueuedThread(lock, t2);
1368	>	assertEquals(2, lock.getQueuedThreads().size());
1369		assertTrue(lock.getQueuedThreads().contains(t1));
1370		assertTrue(lock.getQueuedThreads().contains(t2));
1371		t1.interrupt();
1372	<	Thread.sleep(SHORT_DELAY_MS);
1372	>	awaitTermination(t1);
1373		assertFalse(lock.getQueuedThreads().contains(t1));
1374		assertTrue(lock.getQueuedThreads().contains(t2));
1375	+	assertEquals(1, lock.getQueuedThreads().size());
1376		lock.writeLock().unlock();
1377	<	Thread.sleep(SHORT_DELAY_MS);
1377	>	awaitTermination(t2);
1378		assertTrue(lock.getQueuedThreads().isEmpty());
1190	–	t1.join();
1191	–	t2.join();
1379		}
1380
1381		/**
1382		* hasWaiters throws NPE if null
1383		*/
1384	<	public void testHasWaitersNPE() {
1385	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1384	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1385	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1386	>	public void testHasWaitersNPE(boolean fair) {
1387	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1388		try {
1389		lock.hasWaiters(null);
1390		shouldThrow();
#	Line 1205 | Line 1394 | public class ReentrantReadWriteLockTest
1394		/**
1395		* getWaitQueueLength throws NPE if null
1396		*/
1397	<	public void testGetWaitQueueLengthNPE() {
1398	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1398	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1399	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1400	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1401		try {
1402		lock.getWaitQueueLength(null);
1403		shouldThrow();
1404		} catch (NullPointerException success) {}
1405		}
1406
1216	–
1407		/**
1408		* getWaitingThreads throws NPE if null
1409		*/
1410	<	public void testGetWaitingThreadsNPE() {
1411	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1410	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1411	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1412	>	public void testGetWaitingThreadsNPE(boolean fair) {
1413	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1414		try {
1415		lock.getWaitingThreads(null);
1416		shouldThrow();
#	Line 1226 | Line 1418 | public class ReentrantReadWriteLockTest
1418		}
1419
1420		/**
1421	<	* hasWaiters throws IAE if not owned
1421	>	* hasWaiters throws IllegalArgumentException if not owned
1422		*/
1423	<	public void testHasWaitersIAE() {
1424	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1423	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1424	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1425	>	public void testHasWaitersIAE(boolean fair) {
1426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1427		final Condition c = lock.writeLock().newCondition();
1428	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1428	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1429		try {
1430		lock2.hasWaiters(c);
1431		shouldThrow();
#	Line 1239 | Line 1433 | public class ReentrantReadWriteLockTest
1433		}
1434
1435		/**
1436	<	* hasWaiters throws IMSE if not locked
1436	>	* hasWaiters throws IllegalMonitorStateException if not locked
1437		*/
1438	<	public void testHasWaitersIMSE() {
1439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1438	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1439	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1440	>	public void testHasWaitersIMSE(boolean fair) {
1441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1442		final Condition c = lock.writeLock().newCondition();
1443		try {
1444		lock.hasWaiters(c);
#	Line 1250 | Line 1446 | public class ReentrantReadWriteLockTest
1446		} catch (IllegalMonitorStateException success) {}
1447		}
1448
1253	–
1449		/**
1450	<	* getWaitQueueLength throws IAE if not owned
1450	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1451		*/
1452	<	public void testGetWaitQueueLengthIAE() {
1453	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1452	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1453	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1454	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1455	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1456		final Condition c = lock.writeLock().newCondition();
1457	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1457	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1458		try {
1459		lock2.getWaitQueueLength(c);
1460		shouldThrow();
#	Line 1265 | Line 1462 | public class ReentrantReadWriteLockTest
1462		}
1463
1464		/**
1465	<	* getWaitQueueLength throws IMSE if not locked
1465	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1466		*/
1467	<	public void testGetWaitQueueLengthIMSE() {
1468	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1467	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1468	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1469	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1470	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1471		final Condition c = lock.writeLock().newCondition();
1472		try {
1473		lock.getWaitQueueLength(c);
#	Line 1276 | Line 1475 | public class ReentrantReadWriteLockTest
1475		} catch (IllegalMonitorStateException success) {}
1476		}
1477
1279	–
1478		/**
1479	<	* getWaitingThreads throws IAE if not owned
1479	>	* getWaitingThreads throws IllegalArgumentException if not owned
1480		*/
1481	<	public void testGetWaitingThreadsIAE() {
1482	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1481	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1482	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1483	>	public void testGetWaitingThreadsIAE(boolean fair) {
1484	>	final PublicReentrantReadWriteLock lock =
1485	>	new PublicReentrantReadWriteLock(fair);
1486		final Condition c = lock.writeLock().newCondition();
1487	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1487	>	final PublicReentrantReadWriteLock lock2 =
1488	>	new PublicReentrantReadWriteLock(fair);
1489		try {
1490		lock2.getWaitingThreads(c);
1491		shouldThrow();
#	Line 1291 | Line 1493 | public class ReentrantReadWriteLockTest
1493		}
1494
1495		/**
1496	<	* getWaitingThreads throws IMSE if not locked
1496	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1497		*/
1498	<	public void testGetWaitingThreadsIMSE() {
1499	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1498	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1499	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1500	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1501	>	final PublicReentrantReadWriteLock lock =
1502	>	new PublicReentrantReadWriteLock(fair);
1503		final Condition c = lock.writeLock().newCondition();
1504		try {
1505		lock.getWaitingThreads(c);
#	Line 1302 | Line 1507 | public class ReentrantReadWriteLockTest
1507		} catch (IllegalMonitorStateException success) {}
1508		}
1509
1305	–
1510		/**
1511		* hasWaiters returns true when a thread is waiting, else false
1512		*/
1513	<	public void testHasWaiters() throws InterruptedException {
1514	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1513	>	public void testHasWaiters()      { testHasWaiters(false); }
1514	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1515	>	public void testHasWaiters(boolean fair) {
1516	>	final PublicReentrantReadWriteLock lock =
1517	>	new PublicReentrantReadWriteLock(fair);
1518		final Condition c = lock.writeLock().newCondition();
1519	<	Thread t = new Thread(new Runnable() {
1520	<	public void run() {
1521	<	try {
1522	<	lock.writeLock().lock();
1523	<	threadAssertFalse(lock.hasWaiters(c));
1524	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1525	<	c.await();
1526	<	lock.writeLock().unlock();
1527	<	}
1528	<	catch (InterruptedException e) {
1529	<	threadUnexpectedException();
1530	<	}
1324	<	}
1325	<	});
1519	>	final CountDownLatch locked = new CountDownLatch(1);
1520	>	Thread t = newStartedThread(new CheckedRunnable() {
1521	>	public void realRun() throws InterruptedException {
1522	>	lock.writeLock().lock();
1523	>	assertHasNoWaiters(lock, c);
1524	>	assertFalse(lock.hasWaiters(c));
1525	>	locked.countDown();
1526	>	c.await();
1527	>	assertHasNoWaiters(lock, c);
1528	>	assertFalse(lock.hasWaiters(c));
1529	>	lock.writeLock().unlock();
1530	>	}});
1531
1532	<	t.start();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1532	>	await(locked);
1533		lock.writeLock().lock();
1534	+	assertHasWaiters(lock, c, t);
1535		assertTrue(lock.hasWaiters(c));
1331	–	assertEquals(1, lock.getWaitQueueLength(c));
1536		c.signal();
1537	<	lock.writeLock().unlock();
1334	<	Thread.sleep(SHORT_DELAY_MS);
1335	<	lock.writeLock().lock();
1537	>	assertHasNoWaiters(lock, c);
1538		assertFalse(lock.hasWaiters(c));
1337	–	assertEquals(0, lock.getWaitQueueLength(c));
1539		lock.writeLock().unlock();
1540	<	t.join(SHORT_DELAY_MS);
1541	<	assertFalse(t.isAlive());
1540	>	awaitTermination(t);
1541	>	assertHasNoWaiters(lock, c);
1542		}
1543
1544		/**
1545		* getWaitQueueLength returns number of waiting threads
1546		*/
1547	<	public void testGetWaitQueueLength() throws InterruptedException {
1548	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1547	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1548	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1549	>	public void testGetWaitQueueLength(boolean fair) {
1550	>	final PublicReentrantReadWriteLock lock =
1551	>	new PublicReentrantReadWriteLock(fair);
1552		final Condition c = lock.writeLock().newCondition();
1553	<	Thread t = new Thread(new Runnable() {
1554	<	public void run() {
1555	<	try {
1556	<	lock.writeLock().lock();
1557	<	threadAssertFalse(lock.hasWaiters(c));
1558	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1559	<	c.await();
1560	<	lock.writeLock().unlock();
1561	<	}
1358	<	catch (InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1553	>	final CountDownLatch locked = new CountDownLatch(1);
1554	>	Thread t = newStartedThread(new CheckedRunnable() {
1555	>	public void realRun() throws InterruptedException {
1556	>	lock.writeLock().lock();
1557	>	assertEquals(0, lock.getWaitQueueLength(c));
1558	>	locked.countDown();
1559	>	c.await();
1560	>	lock.writeLock().unlock();
1561	>	}});
1562
1563	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1563	>	await(locked);
1564		lock.writeLock().lock();
1565	<	assertTrue(lock.hasWaiters(c));
1565	>	assertHasWaiters(lock, c, t);
1566		assertEquals(1, lock.getWaitQueueLength(c));
1567		c.signal();
1568	<	lock.writeLock().unlock();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	lock.writeLock().lock();
1373	<	assertFalse(lock.hasWaiters(c));
1568	>	assertHasNoWaiters(lock, c);
1569		assertEquals(0, lock.getWaitQueueLength(c));
1570		lock.writeLock().unlock();
1571	<	t.join(SHORT_DELAY_MS);
1377	<	assertFalse(t.isAlive());
1571	>	awaitTermination(t);
1572		}
1573
1380	–
1574		/**
1575		* getWaitingThreads returns only and all waiting threads
1576		*/
1577	<	public void testGetWaitingThreads() throws InterruptedException {
1578	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1577	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1578	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1579	>	public void testGetWaitingThreads(boolean fair) {
1580	>	final PublicReentrantReadWriteLock lock =
1581	>	new PublicReentrantReadWriteLock(fair);
1582		final Condition c = lock.writeLock().newCondition();
1583	<	Thread t1 = new Thread(new Runnable() {
1584	<	public void run() {
1585	<	try {
1586	<	lock.writeLock().lock();
1587	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1588	<	c.await();
1589	<	lock.writeLock().unlock();
1590	<	}
1591	<	catch (InterruptedException e) {
1592	<	threadUnexpectedException();
1593	<	}
1594	<	}
1595	<	});
1596	<
1597	<	Thread t2 = new Thread(new Runnable() {
1598	<	public void run() {
1599	<	try {
1600	<	lock.writeLock().lock();
1601	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	<	c.await();
1407	<	lock.writeLock().unlock();
1408	<	}
1409	<	catch (InterruptedException e) {
1410	<	threadUnexpectedException();
1411	<	}
1412	<	}
1413	<	});
1583	>	final CountDownLatch locked1 = new CountDownLatch(1);
1584	>	final CountDownLatch locked2 = new CountDownLatch(1);
1585	>	Thread t1 = new Thread(new CheckedRunnable() {
1586	>	public void realRun() throws InterruptedException {
1587	>	lock.writeLock().lock();
1588	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1589	>	locked1.countDown();
1590	>	c.await();
1591	>	lock.writeLock().unlock();
1592	>	}});
1593	>
1594	>	Thread t2 = new Thread(new CheckedRunnable() {
1595	>	public void realRun() throws InterruptedException {
1596	>	lock.writeLock().lock();
1597	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1598	>	locked2.countDown();
1599	>	c.await();
1600	>	lock.writeLock().unlock();
1601	>	}});
1602
1603		lock.writeLock().lock();
1604		assertTrue(lock.getWaitingThreads(c).isEmpty());
1605		lock.writeLock().unlock();
1606	+
1607		t1.start();
1608	<	Thread.sleep(SHORT_DELAY_MS);
1608	>	await(locked1);
1609		t2.start();
1610	<	Thread.sleep(SHORT_DELAY_MS);
1610	>	await(locked2);
1611	>
1612		lock.writeLock().lock();
1613		assertTrue(lock.hasWaiters(c));
1614		assertTrue(lock.getWaitingThreads(c).contains(t1));
1615		assertTrue(lock.getWaitingThreads(c).contains(t2));
1616	+	assertEquals(2, lock.getWaitingThreads(c).size());
1617		c.signalAll();
1618	+	assertHasNoWaiters(lock, c);
1619		lock.writeLock().unlock();
1620	<	Thread.sleep(SHORT_DELAY_MS);
1621	<	lock.writeLock().lock();
1622	<	assertFalse(lock.hasWaiters(c));
1623	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1624	<	lock.writeLock().unlock();
1433	<	t1.join(SHORT_DELAY_MS);
1434	<	t2.join(SHORT_DELAY_MS);
1435	<	assertFalse(t1.isAlive());
1436	<	assertFalse(t2.isAlive());
1620	>
1621	>	awaitTermination(t1);
1622	>	awaitTermination(t2);
1623	>
1624	>	assertHasNoWaiters(lock, c);
1625		}
1626
1627		/**
1628		* toString indicates current lock state
1629		*/
1630	<	public void testToString() {
1631	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1632	<	String us = lock.toString();
1633	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1634	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1635	<	lock.writeLock().lock();
1636	<	String ws = lock.toString();
1637	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1638	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1630	>	public void testToString()      { testToString(false); }
1631	>	public void testToString_fair() { testToString(true); }
1632	>	public void testToString(boolean fair) {
1633	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1634	>	assertTrue(lock.toString().contains("Write locks = 0"));
1635	>	assertTrue(lock.toString().contains("Read locks = 0"));
1636	>	lock.writeLock().lock();
1637	>	assertTrue(lock.toString().contains("Write locks = 1"));
1638	>	assertTrue(lock.toString().contains("Read locks = 0"));
1639	>	lock.writeLock().lock();
1640	>	assertTrue(lock.toString().contains("Write locks = 2"));
1641	>	assertTrue(lock.toString().contains("Read locks = 0"));
1642	>	lock.writeLock().unlock();
1643		lock.writeLock().unlock();
1644		lock.readLock().lock();
1645	+	assertTrue(lock.toString().contains("Write locks = 0"));
1646	+	assertTrue(lock.toString().contains("Read locks = 1"));
1647		lock.readLock().lock();
1648	<	String rs = lock.toString();
1649	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1456	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1648	>	assertTrue(lock.toString().contains("Write locks = 0"));
1649	>	assertTrue(lock.toString().contains("Read locks = 2"));
1650		}
1651
1652		/**
1653		* readLock.toString indicates current lock state
1654		*/
1655	<	public void testReadLockToString() {
1656	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1657	<	String us = lock.readLock().toString();
1658	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1655	>	public void testReadLockToString()      { testReadLockToString(false); }
1656	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1657	>	public void testReadLockToString(boolean fair) {
1658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1660		lock.readLock().lock();
1661	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1662		lock.readLock().lock();
1663	<	String rs = lock.readLock().toString();
1664	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664	>	lock.readLock().unlock();
1665	>	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1666	>	lock.readLock().unlock();
1667	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1668		}
1669
1670		/**
1671		* writeLock.toString indicates current lock state
1672		*/
1673	<	public void testWriteLockToString() {
1674	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1675	<	String us = lock.writeLock().toString();
1676	<	assertTrue(us.indexOf("Unlocked") >= 0);
1673	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1674	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1675	>	public void testWriteLockToString(boolean fair) {
1676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678		lock.writeLock().lock();
1679	<	String ls = lock.writeLock().toString();
1680	<	assertTrue(ls.indexOf("Locked") >= 0);
1679	>	assertTrue(lock.writeLock().toString().contains("Locked by"));
1680	>	lock.writeLock().unlock();
1681	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1682		}
1683
1684		}

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