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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 1.66 by jsr166, Fri Jun 3 05:07:14 2011 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.*;
10	>	import java.util.concurrent.atomic.AtomicBoolean;
11	>	import java.util.concurrent.locks.Condition;
12	>	import java.util.concurrent.locks.Lock;
13	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
16		import java.util.*;
17
18		public class ReentrantReadWriteLockTest extends JSR166TestCase {
19		public static void main(String[] args) {
20	<	junit.textui.TestRunner.run (suite());
20	>	junit.textui.TestRunner.run(suite());
21		}
22		public static Test suite() {
23	<	return new TestSuite(ReentrantReadWriteLockTest.class);
23	>	return new TestSuite(ReentrantReadWriteLockTest.class);
24		}
25
26		/**
#	Line 31 | Line 34 | public class ReentrantReadWriteLockTest
34		}
35		}
36
34	–
37		/**
38		* A runnable calling lockInterruptibly that expects to be
39		* interrupted
#	Line 49 | Line 51 | public class ReentrantReadWriteLockTest
51		*/
52		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
53		PublicReentrantReadWriteLock() { super(); }
54	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
55	+	public Thread getOwner() {
56	+	return super.getOwner();
57	+	}
58		public Collection<Thread> getQueuedThreads() {
59		return super.getQueuedThreads();
60		}
#	Line 58 | Line 64 | public class ReentrantReadWriteLockTest
64		}
65
66		/**
67	<	* Constructor sets given fairness, and is in unlocked state
67	>	* Releases write lock, checking that it had a hold count of 1.
68		*/
69	<	public void testConstructor() {
70	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
71	<	assertFalse(rl.isFair());
72	<	assertFalse(rl.isWriteLocked());
73	<	assertEquals(0, rl.getReadLockCount());
74	<	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());
69	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
70	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
71	>	assertWriteLockedByMoi(lock);
72	>	assertEquals(1, lock.getWriteHoldCount());
73	>	writeLock.unlock();
74	>	assertNotWriteLocked(lock);
75		}
76
77		/**
78	<	* write-locking and read-locking an unlocked lock succeed
78	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
79		*/
80	<	public void testLock() {
81	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	<	rl.writeLock().lock();
83	<	assertTrue(rl.isWriteLocked());
84	<	assertTrue(rl.isWriteLockedByCurrentThread());
85	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
86	<	assertEquals(0, rl.getReadLockCount());
87	<	rl.writeLock().unlock();
88	<	assertFalse(rl.isWriteLocked());
90	<	assertFalse(rl.isWriteLockedByCurrentThread());
91	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
92	<	assertEquals(0, rl.getReadLockCount());
93	<	rl.readLock().lock();
94	<	assertFalse(rl.isWriteLocked());
95	<	assertFalse(rl.isWriteLockedByCurrentThread());
96	<	assertEquals(1, rl.getReadLockCount());
97	<	rl.readLock().unlock();
98	<	assertFalse(rl.isWriteLocked());
99	<	assertFalse(rl.isWriteLockedByCurrentThread());
100	<	assertEquals(0, rl.getReadLockCount());
80	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
81	>	long startTime = System.nanoTime();
82	>	while (!lock.hasQueuedThread(t)) {
83	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
84	>	throw new AssertionFailedError("timed out");
85	>	Thread.yield();
86	>	}
87	>	assertTrue(t.isAlive());
88	>	assertTrue(lock.getOwner() != t);
89		}
90
91	+	/**
92	+	* Checks that lock is not write-locked.
93	+	*/
94	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
95	+	assertFalse(lock.isWriteLocked());
96	+	assertFalse(lock.isWriteLockedByCurrentThread());
97	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
98	+	assertEquals(0, lock.getWriteHoldCount());
99	+	assertEquals(0, lock.writeLock().getHoldCount());
100	+	assertNull(lock.getOwner());
101	+	}
102
103		/**
104	<	* locking an unlocked fair lock succeeds
105	<	*/
106	<	public void testFairLock() {
107	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	<	rl.writeLock().lock();
109	<	assertTrue(rl.isWriteLocked());
110	<	assertTrue(rl.isWriteLockedByCurrentThread());
111	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
112	<	assertEquals(0, rl.getReadLockCount());
113	<	rl.writeLock().unlock();
114	<	assertFalse(rl.isWriteLocked());
115	<	assertFalse(rl.isWriteLockedByCurrentThread());
116	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
117	<	assertEquals(0, rl.getReadLockCount());
118	<	rl.readLock().lock();
119	<	assertFalse(rl.isWriteLocked());
120	<	assertFalse(rl.isWriteLockedByCurrentThread());
121	<	assertEquals(1, rl.getReadLockCount());
122	<	rl.readLock().unlock();
123	<	assertFalse(rl.isWriteLocked());
124	<	assertFalse(rl.isWriteLockedByCurrentThread());
125	<	assertEquals(0, rl.getReadLockCount());
104	>	* Checks that lock is write-locked by the given thread.
105	>	*/
106	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
107	>	assertTrue(lock.isWriteLocked());
108	>	assertSame(t, lock.getOwner());
109	>	assertEquals(t == Thread.currentThread(),
110	>	lock.isWriteLockedByCurrentThread());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.writeLock().isHeldByCurrentThread());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.getWriteHoldCount() > 0);
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.writeLock().getHoldCount() > 0);
117	>	assertEquals(0, lock.getReadLockCount());
118	>	}
119	>
120	>	/**
121	>	* Checks that lock is write-locked by the current thread.
122	>	*/
123	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
124	>	assertWriteLockedBy(lock, Thread.currentThread());
125	>	}
126	>
127	>	/**
128	>	* Checks that condition c has no waiters.
129	>	*/
130	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
131	>	assertHasWaiters(lock, c, new Thread[] {});
132	>	}
133	>
134	>	/**
135	>	* Checks that condition c has exactly the given waiter threads.
136	>	*/
137	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
138	>	Thread... threads) {
139	>	lock.writeLock().lock();
140	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
141	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
142	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
143	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
144	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
145	>	new HashSet<Thread>(Arrays.asList(threads)));
146	>	lock.writeLock().unlock();
147	>	}
148	>
149	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
150	>
151	>	/**
152	>	* Awaits condition using the specified AwaitMethod.
153	>	*/
154	>	void await(Condition c, AwaitMethod awaitMethod)
155	>	throws InterruptedException {
156	>	switch (awaitMethod) {
157	>	case await:
158	>	c.await();
159	>	break;
160	>	case awaitTimed:
161	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
162	>	break;
163	>	case awaitNanos:
164	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
165	>	assertTrue(nanosRemaining > 0);
166	>	break;
167	>	case awaitUntil:
168	>	java.util.Date d = new java.util.Date();
169	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
170	>	break;
171	>	}
172	>	}
173	>
174	>	/**
175	>	* Constructor sets given fairness, and is in unlocked state
176	>	*/
177	>	public void testConstructor() {
178	>	PublicReentrantReadWriteLock lock;
179	>
180	>	lock = new PublicReentrantReadWriteLock();
181	>	assertFalse(lock.isFair());
182	>	assertNotWriteLocked(lock);
183	>	assertEquals(0, lock.getReadLockCount());
184	>
185	>	lock = new PublicReentrantReadWriteLock(true);
186	>	assertTrue(lock.isFair());
187	>	assertNotWriteLocked(lock);
188	>	assertEquals(0, lock.getReadLockCount());
189	>
190	>	lock = new PublicReentrantReadWriteLock(false);
191	>	assertFalse(lock.isFair());
192	>	assertNotWriteLocked(lock);
193	>	assertEquals(0, lock.getReadLockCount());
194	>	}
195	>
196	>	/**
197	>	* write-locking and read-locking an unlocked lock succeed
198	>	*/
199	>	public void testLock()      { testLock(false); }
200	>	public void testLock_fair() { testLock(true); }
201	>	public void testLock(boolean fair) {
202	>	PublicReentrantReadWriteLock lock =
203	>	new PublicReentrantReadWriteLock(fair);
204	>	assertNotWriteLocked(lock);
205	>	lock.writeLock().lock();
206	>	assertWriteLockedByMoi(lock);
207	>	lock.writeLock().unlock();
208	>	assertNotWriteLocked(lock);
209	>	assertEquals(0, lock.getReadLockCount());
210	>	lock.readLock().lock();
211	>	assertNotWriteLocked(lock);
212	>	assertEquals(1, lock.getReadLockCount());
213	>	lock.readLock().unlock();
214	>	assertNotWriteLocked(lock);
215	>	assertEquals(0, lock.getReadLockCount());
216		}
217
218		/**
219		* getWriteHoldCount returns number of recursive holds
220		*/
221	<	public void testGetWriteHoldCount() {
222	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
223	<	for (int i = 1; i <= SIZE; i++) {
224	<	lock.writeLock().lock();
225	<	assertEquals(i,lock.getWriteHoldCount());
226	<	}
227	<	for (int i = SIZE; i > 0; i--) {
228	<	lock.writeLock().unlock();
229	<	assertEquals(i-1,lock.getWriteHoldCount());
230	<	}
221	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
222	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
223	>	public void testGetWriteHoldCount(boolean fair) {
224	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
225	>	for (int i = 1; i <= SIZE; i++) {
226	>	lock.writeLock().lock();
227	>	assertEquals(i,lock.getWriteHoldCount());
228	>	}
229	>	for (int i = SIZE; i > 0; i--) {
230	>	lock.writeLock().unlock();
231	>	assertEquals(i-1,lock.getWriteHoldCount());
232	>	}
233		}
234
235		/**
236	<	* WriteLock.getHoldCount returns number of recursive holds
237	<	*/
238	<	public void testGetHoldCount() {
239	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
240	<	for (int i = 1; i <= SIZE; i++) {
241	<	lock.writeLock().lock();
242	<	assertEquals(i,lock.writeLock().getHoldCount());
243	<	}
244	<	for (int i = SIZE; i > 0; i--) {
245	<	lock.writeLock().unlock();
246	<	assertEquals(i-1,lock.writeLock().getHoldCount());
247	<	}
236	>	* writelock.getHoldCount returns number of recursive holds
237	>	*/
238	>	public void testGetHoldCount()      { testGetHoldCount(false); }
239	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
240	>	public void testGetHoldCount(boolean fair) {
241	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
242	>	for (int i = 1; i <= SIZE; i++) {
243	>	lock.writeLock().lock();
244	>	assertEquals(i,lock.writeLock().getHoldCount());
245	>	}
246	>	for (int i = SIZE; i > 0; i--) {
247	>	lock.writeLock().unlock();
248	>	assertEquals(i-1,lock.writeLock().getHoldCount());
249	>	}
250		}
251
252		/**
253		* getReadHoldCount returns number of recursive holds
254		*/
255	<	public void testGetReadHoldCount() {
256	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
257	<	for (int i = 1; i <= SIZE; i++) {
258	<	lock.readLock().lock();
259	<	assertEquals(i,lock.getReadHoldCount());
260	<	}
261	<	for (int i = SIZE; i > 0; i--) {
262	<	lock.readLock().unlock();
263	<	assertEquals(i-1,lock.getReadHoldCount());
264	<	}
255	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
256	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
257	>	public void testGetReadHoldCount(boolean fair) {
258	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
259	>	for (int i = 1; i <= SIZE; i++) {
260	>	lock.readLock().lock();
261	>	assertEquals(i,lock.getReadHoldCount());
262	>	}
263	>	for (int i = SIZE; i > 0; i--) {
264	>	lock.readLock().unlock();
265	>	assertEquals(i-1,lock.getReadHoldCount());
266	>	}
267		}
268
174	–
269		/**
270		* write-unlocking an unlocked lock throws IllegalMonitorStateException
271		*/
272	<	public void testUnlock_IllegalMonitorStateException() {
273	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
274	<	try {
275	<	rl.writeLock().unlock();
276	<	shouldThrow();
277	<	} catch (IllegalMonitorStateException success) {}
272	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
273	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
274	>	public void testWriteUnlock_IMSE(boolean fair) {
275	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
276	>	try {
277	>	lock.writeLock().unlock();
278	>	shouldThrow();
279	>	} catch (IllegalMonitorStateException success) {}
280		}
281
282	+	/**
283	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
284	+	*/
285	+	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
286	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
287	+	public void testReadUnlock_IMSE(boolean fair) {
288	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
289	+	try {
290	+	lock.readLock().unlock();
291	+	shouldThrow();
292	+	} catch (IllegalMonitorStateException success) {}
293	+	}
294
295		/**
296		* write-lockInterruptibly is interruptible
297		*/
298	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
299	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
300	<	Thread t = new Thread(new Runnable() {
301	<	public void run() {
302	<	try {
303	<	lock.writeLock().lockInterruptibly();
304	<	lock.writeLock().unlock();
305	<	lock.writeLock().lockInterruptibly();
306	<	lock.writeLock().unlock();
307	<	} catch (InterruptedException success) {}
200	<	}
201	<	});
298	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
299	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
300	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
301	>	final PublicReentrantReadWriteLock lock =
302	>	new PublicReentrantReadWriteLock(fair);
303	>	lock.writeLock().lock();
304	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
305	>	public void realRun() throws InterruptedException {
306	>	lock.writeLock().lockInterruptibly();
307	>	}});
308
309	<	lock.writeLock().lock();
204	<	t.start();
205	<	Thread.sleep(SHORT_DELAY_MS);
309	>	waitForQueuedThread(lock, t);
310		t.interrupt();
311	<	Thread.sleep(SHORT_DELAY_MS);
312	<	lock.writeLock().unlock();
209	<	t.join();
311	>	awaitTermination(t);
312	>	releaseWriteLock(lock);
313		}
314
315		/**
316		* timed write-tryLock is interruptible
317		*/
318	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
319	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
320	<	lock.writeLock().lock();
321	<	Thread t = new Thread(new Runnable() {
322	<	public void run() {
323	<	try {
324	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
325	<	} catch (InterruptedException success) {}
326	<	}
327	<	});
318	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
319	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
320	>	public void testWriteTryLock_Interruptible(boolean fair) {
321	>	final PublicReentrantReadWriteLock lock =
322	>	new PublicReentrantReadWriteLock(fair);
323	>	lock.writeLock().lock();
324	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
325	>	public void realRun() throws InterruptedException {
326	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
327	>	}});
328
329	<	t.start();
329	>	waitForQueuedThread(lock, t);
330		t.interrupt();
331	<	lock.writeLock().unlock();
332	<	t.join();
331	>	awaitTermination(t);
332	>	releaseWriteLock(lock);
333		}
334
335		/**
336		* read-lockInterruptibly is interruptible
337		*/
338	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
339	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
340	<	lock.writeLock().lock();
341	<	Thread t = new Thread(new Runnable() {
342	<	public void run() {
343	<	try {
344	<	lock.readLock().lockInterruptibly();
345	<	} catch (InterruptedException success) {}
346	<	}
347	<	});
338	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
339	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
340	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
341	>	final PublicReentrantReadWriteLock lock =
342	>	new PublicReentrantReadWriteLock(fair);
343	>	lock.writeLock().lock();
344	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
345	>	public void realRun() throws InterruptedException {
346	>	lock.readLock().lockInterruptibly();
347	>	}});
348
349	<	t.start();
247	<	Thread.sleep(SHORT_DELAY_MS);
349	>	waitForQueuedThread(lock, t);
350		t.interrupt();
351	<	Thread.sleep(SHORT_DELAY_MS);
352	<	lock.writeLock().unlock();
251	<	t.join();
351	>	awaitTermination(t);
352	>	releaseWriteLock(lock);
353		}
354
355		/**
356		* timed read-tryLock is interruptible
357		*/
358	<	public void testReadTryLock_Interrupted() throws InterruptedException {
359	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
360	<	lock.writeLock().lock();
361	<	Thread t = new Thread(new Runnable() {
362	<	public void run() {
363	<	try {
364	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
365	<	threadShouldThrow();
366	<	} catch (InterruptedException success) {}
367	<	}
267	<	});
358	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
359	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
360	>	public void testReadTryLock_Interruptible(boolean fair) {
361	>	final PublicReentrantReadWriteLock lock =
362	>	new PublicReentrantReadWriteLock(fair);
363	>	lock.writeLock().lock();
364	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
365	>	public void realRun() throws InterruptedException {
366	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
367	>	}});
368
369	<	t.start();
369	>	waitForQueuedThread(lock, t);
370		t.interrupt();
371	<	t.join();
371	>	awaitTermination(t);
372	>	releaseWriteLock(lock);
373		}
374
274	–
375		/**
376	<	* write-tryLock fails if locked
376	>	* write-tryLock on an unlocked lock succeeds
377		*/
378	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
379	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
380	<	lock.writeLock().lock();
381	<	Thread t = new Thread(new Runnable() {
382	<	public void run() {
383	<	threadAssertFalse(lock.writeLock().tryLock());
384	<	}
385	<	});
386	<
287	<	t.start();
288	<	t.join();
378	>	public void testWriteTryLock()      { testWriteTryLock(false); }
379	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
380	>	public void testWriteTryLock(boolean fair) {
381	>	final PublicReentrantReadWriteLock lock =
382	>	new PublicReentrantReadWriteLock(fair);
383	>	assertTrue(lock.writeLock().tryLock());
384	>	assertWriteLockedByMoi(lock);
385	>	assertTrue(lock.writeLock().tryLock());
386	>	assertWriteLockedByMoi(lock);
387		lock.writeLock().unlock();
388	+	releaseWriteLock(lock);
389		}
390
391		/**
392	<	* read-tryLock fails if locked
392	>	* write-tryLock fails if locked
393		*/
394	<	public void testReadTryLockWhenLocked() throws InterruptedException {
395	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
396	<	lock.writeLock().lock();
397	<	Thread t = new Thread(new Runnable() {
398	<	public void run() {
399	<	threadAssertFalse(lock.readLock().tryLock());
400	<	}
401	<	});
394	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
395	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
396	>	public void testWriteTryLockWhenLocked(boolean fair) {
397	>	final PublicReentrantReadWriteLock lock =
398	>	new PublicReentrantReadWriteLock(fair);
399	>	lock.writeLock().lock();
400	>	Thread t = newStartedThread(new CheckedRunnable() {
401	>	public void realRun() {
402	>	assertFalse(lock.writeLock().tryLock());
403	>	}});
404
405	<	t.start();
406	<	t.join();
306	<	lock.writeLock().unlock();
405	>	awaitTermination(t);
406	>	releaseWriteLock(lock);
407		}
408
409		/**
410	<	* Multiple threads can hold a read lock when not write-locked
410	>	* read-tryLock fails if locked
411		*/
412	<	public void testMultipleReadLocks() throws InterruptedException {
413	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
414	<	lock.readLock().lock();
415	<	Thread t = new Thread(new Runnable() {
416	<	public void run() {
417	<	threadAssertTrue(lock.readLock().tryLock());
418	<	lock.readLock().unlock();
419	<	}
420	<	});
412	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
413	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
414	>	public void testReadTryLockWhenLocked(boolean fair) {
415	>	final PublicReentrantReadWriteLock lock =
416	>	new PublicReentrantReadWriteLock(fair);
417	>	lock.writeLock().lock();
418	>	Thread t = newStartedThread(new CheckedRunnable() {
419	>	public void realRun() {
420	>	assertFalse(lock.readLock().tryLock());
421	>	}});
422
423	<	t.start();
424	<	t.join();
324	<	lock.readLock().unlock();
423	>	awaitTermination(t);
424	>	releaseWriteLock(lock);
425		}
426
427		/**
428	<	* A writelock succeeds after reading threads unlock
428	>	* Multiple threads can hold a read lock when not write-locked
429		*/
430	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
431	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
432	<	lock.readLock().lock();
433	<	Thread t1 = new Thread(new Runnable() {
434	<	public void run() {
435	<	lock.readLock().lock();
436	<	lock.readLock().unlock();
437	<	}
438	<	});
439	<	Thread t2 = new Thread(new Runnable() {
440	<	public void run() {
441	<	lock.writeLock().lock();
442	<	lock.writeLock().unlock();
443	<	}
344	<	});
430	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
431	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
432	>	public void testMultipleReadLocks(boolean fair) {
433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
434	>	lock.readLock().lock();
435	>	Thread t = newStartedThread(new CheckedRunnable() {
436	>	public void realRun() throws InterruptedException {
437	>	assertTrue(lock.readLock().tryLock());
438	>	lock.readLock().unlock();
439	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
440	>	lock.readLock().unlock();
441	>	lock.readLock().lock();
442	>	lock.readLock().unlock();
443	>	}});
444
445	<	t1.start();
347	<	t2.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
445	>	awaitTermination(t);
446		lock.readLock().unlock();
350	–	t1.join(MEDIUM_DELAY_MS);
351	–	t2.join(MEDIUM_DELAY_MS);
352	–	assertTrue(!t1.isAlive());
353	–	assertTrue(!t2.isAlive());
354	–	}
355	–
356	–	/**
357	–	* 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());
447		}
448
449		/**
450	<	* Read trylock succeeds if write locked by current thread
450	>	* A writelock succeeds only after a reading thread unlocks
451		*/
452	<	public void testReadHoldingWriteLock() {
453	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
454	<	lock.writeLock().lock();
455	<	assertTrue(lock.readLock().tryLock());
452	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
453	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
454	>	public void testWriteAfterReadLock(boolean fair) {
455	>	final PublicReentrantReadWriteLock lock =
456	>	new PublicReentrantReadWriteLock(fair);
457	>	lock.readLock().lock();
458	>	Thread t = newStartedThread(new CheckedRunnable() {
459	>	public void realRun() {
460	>	assertEquals(1, lock.getReadLockCount());
461	>	lock.writeLock().lock();
462	>	assertEquals(0, lock.getReadLockCount());
463	>	lock.writeLock().unlock();
464	>	}});
465	>	waitForQueuedThread(lock, t);
466	>	assertNotWriteLocked(lock);
467	>	assertEquals(1, lock.getReadLockCount());
468		lock.readLock().unlock();
469	<	lock.writeLock().unlock();
469	>	assertEquals(0, lock.getReadLockCount());
470	>	awaitTermination(t);
471	>	assertNotWriteLocked(lock);
472		}
473
474		/**
475	<	* Read lock succeeds if write locked by current thread even if
398	<	* other threads are waiting for readlock
475	>	* A writelock succeeds only after reading threads unlock
476		*/
477	<	public void testReadHoldingWriteLock2() throws InterruptedException {
478	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
479	<	lock.writeLock().lock();
480	<	Thread t1 = new Thread(new Runnable() {
481	<	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();
477	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
478	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
479	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
480	>	final PublicReentrantReadWriteLock lock =
481	>	new PublicReentrantReadWriteLock(fair);
482		lock.readLock().lock();
419	–	lock.readLock().unlock();
420	–	Thread.sleep(SHORT_DELAY_MS);
483		lock.readLock().lock();
484	+	Thread t1 = newStartedThread(new CheckedRunnable() {
485	+	public void realRun() {
486	+	lock.readLock().lock();
487	+	assertEquals(3, lock.getReadLockCount());
488	+	lock.readLock().unlock();
489	+	}});
490	+	awaitTermination(t1);
491	+
492	+	Thread t2 = newStartedThread(new CheckedRunnable() {
493	+	public void realRun() {
494	+	assertEquals(2, lock.getReadLockCount());
495	+	lock.writeLock().lock();
496	+	assertEquals(0, lock.getReadLockCount());
497	+	lock.writeLock().unlock();
498	+	}});
499	+	waitForQueuedThread(lock, t2);
500	+	assertNotWriteLocked(lock);
501	+	assertEquals(2, lock.getReadLockCount());
502		lock.readLock().unlock();
503	<	lock.writeLock().unlock();
504	<	t1.join(MEDIUM_DELAY_MS);
505	<	t2.join(MEDIUM_DELAY_MS);
506	<	assertTrue(!t1.isAlive());
427	<	assertTrue(!t2.isAlive());
503	>	lock.readLock().unlock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	awaitTermination(t2);
506	>	assertNotWriteLocked(lock);
507		}
508
509		/**
510	<	*  Read lock succeeds if write locked by current thread even if
511	<	* other threads are waiting for writelock
510	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
511	>	* will block if there is a waiting writer thread
512		*/
513	<	public void testReadHoldingWriteLock3() throws InterruptedException {
514	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
515	<	lock.writeLock().lock();
516	<	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	<	});
513	>	public void testReaderWriterReaderFairFifo() {
514	>	final PublicReentrantReadWriteLock lock =
515	>	new PublicReentrantReadWriteLock(true);
516	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
517
450	–	t1.start();
451	–	t2.start();
518		lock.readLock().lock();
519	+	Thread t1 = newStartedThread(new CheckedRunnable() {
520	+	public void realRun() {
521	+	assertEquals(1, lock.getReadLockCount());
522	+	lock.writeLock().lock();
523	+	assertEquals(0, lock.getReadLockCount());
524	+	t1GotLock.set(true);
525	+	lock.writeLock().unlock();
526	+	}});
527	+	waitForQueuedThread(lock, t1);
528	+
529	+	Thread t2 = newStartedThread(new CheckedRunnable() {
530	+	public void realRun() {
531	+	assertEquals(1, lock.getReadLockCount());
532	+	lock.readLock().lock();
533	+	assertEquals(1, lock.getReadLockCount());
534	+	assertTrue(t1GotLock.get());
535	+	lock.readLock().unlock();
536	+	}});
537	+	waitForQueuedThread(lock, t2);
538	+	assertTrue(t1.isAlive());
539	+	assertNotWriteLocked(lock);
540	+	assertEquals(1, lock.getReadLockCount());
541		lock.readLock().unlock();
542	<	Thread.sleep(SHORT_DELAY_MS);
543	<	lock.readLock().lock();
544	<	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());
542	>	awaitTermination(t1);
543	>	awaitTermination(t2);
544	>	assertNotWriteLocked(lock);
545		}
546
547	+	/**
548	+	* Readlocks succeed only after a writing thread unlocks
549	+	*/
550	+	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
551	+	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
552	+	public void testReadAfterWriteLock(boolean fair) {
553	+	final PublicReentrantReadWriteLock lock =
554	+	new PublicReentrantReadWriteLock(fair);
555	+	lock.writeLock().lock();
556	+	Thread t1 = newStartedThread(new CheckedRunnable() {
557	+	public void realRun() {
558	+	lock.readLock().lock();
559	+	lock.readLock().unlock();
560	+	}});
561	+	Thread t2 = newStartedThread(new CheckedRunnable() {
562	+	public void realRun() {
563	+	lock.readLock().lock();
564	+	lock.readLock().unlock();
565	+	}});
566	+
567	+	waitForQueuedThread(lock, t1);
568	+	waitForQueuedThread(lock, t2);
569	+	releaseWriteLock(lock);
570	+	awaitTermination(t1);
571	+	awaitTermination(t2);
572	+	}
573
574		/**
575	<	*  Write lock succeeds if write locked by current thread even if
467	<	* other threads are waiting for writelock
575	>	* Read trylock succeeds if write locked by current thread
576		*/
577	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
578	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
579	<	lock.writeLock().lock();
580	<	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();
487	<	lock.writeLock().lock();
488	<	lock.writeLock().unlock();
489	<	Thread.sleep(SHORT_DELAY_MS);
577	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
578	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
579	>	public void testReadHoldingWriteLock(boolean fair) {
580	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
581		lock.writeLock().lock();
582	+	assertTrue(lock.readLock().tryLock());
583	+	lock.readLock().unlock();
584		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());
585		}
586
499	–
587		/**
588	<	* Fair Read trylock succeeds if write locked by current thread
588	>	* Read trylock succeeds (barging) even in the presence of waiting
589	>	* readers and/or writers
590		*/
591	<	public void testReadHoldingWriteLockFair() {
592	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
593	<	lock.writeLock().lock();
594	<	assertTrue(lock.readLock().tryLock());
591	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
592	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
593	>	public void testReadTryLockBarging(boolean fair) {
594	>	final PublicReentrantReadWriteLock lock =
595	>	new PublicReentrantReadWriteLock(fair);
596	>	lock.readLock().lock();
597	>
598	>	Thread t1 = newStartedThread(new CheckedRunnable() {
599	>	public void realRun() {
600	>	lock.writeLock().lock();
601	>	lock.writeLock().unlock();
602	>	}});
603	>
604	>	waitForQueuedThread(lock, t1);
605	>
606	>	Thread t2 = newStartedThread(new CheckedRunnable() {
607	>	public void realRun() {
608	>	lock.readLock().lock();
609	>	lock.readLock().unlock();
610	>	}});
611	>
612	>	if (fair)
613	>	waitForQueuedThread(lock, t2);
614	>
615	>	Thread t3 = newStartedThread(new CheckedRunnable() {
616	>	public void realRun() {
617	>	lock.readLock().tryLock();
618	>	lock.readLock().unlock();
619	>	}});
620	>
621	>	assertTrue(lock.getReadLockCount() > 0);
622	>	awaitTermination(t3);
623	>	assertTrue(t1.isAlive());
624	>	if (fair) assertTrue(t2.isAlive());
625		lock.readLock().unlock();
626	<	lock.writeLock().unlock();
626	>	awaitTermination(t1);
627	>	awaitTermination(t2);
628		}
629
630		/**
631	<	* Fair Read lock succeeds if write locked by current thread even if
631	>	* Read lock succeeds if write locked by current thread even if
632		* other threads are waiting for readlock
633		*/
634	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
635	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
636	<	lock.writeLock().lock();
637	<	Thread t1 = new Thread(new Runnable() {
638	<	public void run() {
639	<	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();
634	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
635	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
636	>	public void testReadHoldingWriteLock2(boolean fair) {
637	>	final PublicReentrantReadWriteLock lock =
638	>	new PublicReentrantReadWriteLock(fair);
639	>	lock.writeLock().lock();
640		lock.readLock().lock();
641		lock.readLock().unlock();
642	<	Thread.sleep(SHORT_DELAY_MS);
642	>
643	>	Thread t1 = newStartedThread(new CheckedRunnable() {
644	>	public void realRun() {
645	>	lock.readLock().lock();
646	>	lock.readLock().unlock();
647	>	}});
648	>	Thread t2 = newStartedThread(new CheckedRunnable() {
649	>	public void realRun() {
650	>	lock.readLock().lock();
651	>	lock.readLock().unlock();
652	>	}});
653	>
654	>	waitForQueuedThread(lock, t1);
655	>	waitForQueuedThread(lock, t2);
656	>	assertWriteLockedByMoi(lock);
657		lock.readLock().lock();
658		lock.readLock().unlock();
659	<	lock.writeLock().unlock();
660	<	t1.join(MEDIUM_DELAY_MS);
661	<	t2.join(MEDIUM_DELAY_MS);
541	<	assertTrue(!t1.isAlive());
542	<	assertTrue(!t2.isAlive());
659	>	releaseWriteLock(lock);
660	>	awaitTermination(t1);
661	>	awaitTermination(t2);
662		}
663
545	–
664		/**
665	<	* Fair Read lock succeeds if write locked by current thread even if
665	>	* Read lock succeeds if write locked by current thread even if
666		* other threads are waiting for writelock
667		*/
668	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
669	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
670	<	lock.writeLock().lock();
671	<	Thread t1 = new Thread(new Runnable() {
672	<	public void run() {
673	<	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();
668	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
669	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
670	>	public void testReadHoldingWriteLock3(boolean fair) {
671	>	final PublicReentrantReadWriteLock lock =
672	>	new PublicReentrantReadWriteLock(fair);
673	>	lock.writeLock().lock();
674		lock.readLock().lock();
675		lock.readLock().unlock();
676	<	Thread.sleep(SHORT_DELAY_MS);
676	>
677	>	Thread t1 = newStartedThread(new CheckedRunnable() {
678	>	public void realRun() {
679	>	lock.writeLock().lock();
680	>	lock.writeLock().unlock();
681	>	}});
682	>	Thread t2 = newStartedThread(new CheckedRunnable() {
683	>	public void realRun() {
684	>	lock.writeLock().lock();
685	>	lock.writeLock().unlock();
686	>	}});
687	>
688	>	waitForQueuedThread(lock, t1);
689	>	waitForQueuedThread(lock, t2);
690	>	assertWriteLockedByMoi(lock);
691		lock.readLock().lock();
692		lock.readLock().unlock();
693	+	assertWriteLockedByMoi(lock);
694		lock.writeLock().unlock();
695	<	t1.join(MEDIUM_DELAY_MS);
696	<	t2.join(MEDIUM_DELAY_MS);
576	<	assertTrue(!t1.isAlive());
577	<	assertTrue(!t2.isAlive());
695	>	awaitTermination(t1);
696	>	awaitTermination(t2);
697		}
698
580	–
699		/**
700	<	* Fair Write lock succeeds if write locked by current thread even if
700	>	* Write lock succeeds if write locked by current thread even if
701		* other threads are waiting for writelock
702		*/
703	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
704	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
705	<	lock.writeLock().lock();
706	<	Thread t1 = new Thread(new Runnable() {
707	<	public void run() {
708	<	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);
703	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
704	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
705	>	public void testWriteHoldingWriteLock4(boolean fair) {
706	>	final PublicReentrantReadWriteLock lock =
707	>	new PublicReentrantReadWriteLock(fair);
708	>	lock.writeLock().lock();
709		lock.writeLock().lock();
607	–	assertTrue(lock.getWriteHoldCount() == 2);
710		lock.writeLock().unlock();
711	+
712	+	Thread t1 = newStartedThread(new CheckedRunnable() {
713	+	public void realRun() {
714	+	lock.writeLock().lock();
715	+	lock.writeLock().unlock();
716	+	}});
717	+	Thread t2 = newStartedThread(new CheckedRunnable() {
718	+	public void realRun() {
719	+	lock.writeLock().lock();
720	+	lock.writeLock().unlock();
721	+	}});
722	+
723	+	waitForQueuedThread(lock, t1);
724	+	waitForQueuedThread(lock, t2);
725	+	assertWriteLockedByMoi(lock);
726	+	assertEquals(1, lock.getWriteHoldCount());
727		lock.writeLock().lock();
728	+	assertWriteLockedByMoi(lock);
729	+	assertEquals(2, lock.getWriteHoldCount());
730		lock.writeLock().unlock();
731	+	assertWriteLockedByMoi(lock);
732	+	assertEquals(1, lock.getWriteHoldCount());
733		lock.writeLock().unlock();
734	<	t1.join(MEDIUM_DELAY_MS);
735	<	t2.join(MEDIUM_DELAY_MS);
614	<	assertTrue(!t1.isAlive());
615	<	assertTrue(!t2.isAlive());
734	>	awaitTermination(t1);
735	>	awaitTermination(t2);
736		}
737
618	–
738		/**
739		* Read tryLock succeeds if readlocked but not writelocked
740		*/
741	<	public void testTryLockWhenReadLocked() throws InterruptedException {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	<	lock.readLock().lock();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	threadAssertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}
749	<	});
741	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
742	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
743	>	public void testTryLockWhenReadLocked(boolean fair) {
744	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
745	>	lock.readLock().lock();
746	>	Thread t = newStartedThread(new CheckedRunnable() {
747	>	public void realRun() {
748	>	assertTrue(lock.readLock().tryLock());
749	>	lock.readLock().unlock();
750	>	}});
751
752	<	t.start();
633	<	t.join();
752	>	awaitTermination(t);
753		lock.readLock().unlock();
754		}
755
637	–
638	–
756		/**
757		* write tryLock fails when readlocked
758		*/
759	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
760	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761	<	lock.readLock().lock();
762	<	Thread t = new Thread(new Runnable() {
763	<	public void run() {
764	<	threadAssertFalse(lock.writeLock().tryLock());
765	<	}
766	<	});
759	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
760	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
761	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
762	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
763	>	lock.readLock().lock();
764	>	Thread t = newStartedThread(new CheckedRunnable() {
765	>	public void realRun() {
766	>	assertFalse(lock.writeLock().tryLock());
767	>	}});
768
769	<	t.start();
652	<	t.join();
769	>	awaitTermination(t);
770		lock.readLock().unlock();
771		}
772
656	–
773		/**
774	<	* Fair Read tryLock succeeds if readlocked but not writelocked
774	>	* write timed tryLock times out if locked
775		*/
776	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
777	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
778	<	lock.readLock().lock();
779	<	Thread t = new Thread(new Runnable() {
780	<	public void run() {
781	<	threadAssertTrue(lock.readLock().tryLock());
782	<	lock.readLock().unlock();
783	<	}
784	<	});
776	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
777	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
778	>	public void testWriteTryLock_Timeout(boolean fair) {
779	>	final PublicReentrantReadWriteLock lock =
780	>	new PublicReentrantReadWriteLock(fair);
781	>	lock.writeLock().lock();
782	>	Thread t = newStartedThread(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	long startTime = System.nanoTime();
785	>	long timeoutMillis = 10;
786	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
787	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
788	>	}});
789
790	<	t.start();
791	<	t.join();
672	<	lock.readLock().unlock();
790	>	awaitTermination(t);
791	>	releaseWriteLock(lock);
792		}
793
675	–
676	–
794		/**
795	<	* Fair write tryLock fails when readlocked
795	>	* read timed tryLock times out if write-locked
796		*/
797	<	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
798	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
799	<	lock.readLock().lock();
800	<	Thread t = new Thread(new Runnable() {
801	<	public void run() {
802	<	threadAssertFalse(lock.writeLock().tryLock());
803	<	}
804	<	});
797	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
798	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
799	>	public void testReadTryLock_Timeout(boolean fair) {
800	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
801	>	lock.writeLock().lock();
802	>	Thread t = newStartedThread(new CheckedRunnable() {
803	>	public void realRun() throws InterruptedException {
804	>	long startTime = System.nanoTime();
805	>	long timeoutMillis = 10;
806	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
807	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
808	>	}});
809
810	<	t.start();
811	<	t.join();
812	<	lock.readLock().unlock();
810	>	awaitTermination(t);
811	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
812	>	lock.writeLock().unlock();
813		}
814
694	–
695	–
815		/**
816	<	* write timed tryLock times out if locked
816	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
817		*/
818	<	public void testWriteTryLock_Timeout() throws InterruptedException {
819	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
820	<	lock.writeLock().lock();
821	<	Thread t = new Thread(new Runnable() {
822	<	public void run() {
823	<	try {
824	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
825	<	} catch (Exception ex) {
826	<	threadUnexpectedException();
827	<	}
828	<	}
829	<	});
818	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
819	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
820	>	public void testWriteLockInterruptibly(boolean fair) {
821	>	final PublicReentrantReadWriteLock lock =
822	>	new PublicReentrantReadWriteLock(fair);
823	>	try {
824	>	lock.writeLock().lockInterruptibly();
825	>	} catch (InterruptedException ie) {
826	>	threadUnexpectedException(ie);
827	>	}
828	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
829	>	public void realRun() throws InterruptedException {
830	>	lock.writeLock().lockInterruptibly();
831	>	}});
832
833	<	t.start();
834	<	t.join();
835	<	lock.writeLock().unlock();
833	>	waitForQueuedThread(lock, t);
834	>	t.interrupt();
835	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
836	>	awaitTermination(t);
837	>	releaseWriteLock(lock);
838		}
839
840		/**
841	<	* read timed tryLock times out if write-locked
841	>	* read lockInterruptibly succeeds if lock free else is interruptible
842		*/
843	<	public void testReadTryLock_Timeout() throws InterruptedException {
844	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
845	<	lock.writeLock().lock();
846	<	Thread t = new Thread(new Runnable() {
847	<	public void run() {
848	<	try {
849	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
850	<	} catch (Exception ex) {
851	<	threadUnexpectedException();
852	<	}
853	<	}
854	<	});
855	<
856	<	t.start();
857	<	t.join();
858	<	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	<	});
843	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
844	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
845	>	public void testReadLockInterruptibly(boolean fair) {
846	>	final PublicReentrantReadWriteLock lock =
847	>	new PublicReentrantReadWriteLock(fair);
848	>	try {
849	>	lock.readLock().lockInterruptibly();
850	>	lock.readLock().unlock();
851	>	lock.writeLock().lockInterruptibly();
852	>	} catch (InterruptedException ie) {
853	>	threadUnexpectedException(ie);
854	>	}
855	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
856	>	public void realRun() throws InterruptedException {
857	>	lock.readLock().lockInterruptibly();
858	>	}});
859
860	<	t.start();
757	<	Thread.sleep(SHORT_DELAY_MS);
860	>	waitForQueuedThread(lock, t);
861		t.interrupt();
862	<	Thread.sleep(SHORT_DELAY_MS);
863	<	t.join();
761	<	lock.writeLock().unlock();
862	>	awaitTermination(t);
863	>	releaseWriteLock(lock);
864		}
865
866		/**
867	<	*  read lockInterruptibly succeeds if lock free else is interruptible
867	>	* Calling await without holding lock throws IllegalMonitorStateException
868		*/
869	<	public void testReadLockInterruptibly() throws InterruptedException {
870	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
871	<	lock.writeLock().lockInterruptibly();
872	<	Thread t = new Thread(new Runnable() {
873	<	public void run() {
874	<	try {
875	<	lock.readLock().lockInterruptibly();
876	<	threadShouldThrow();
877	<	}
878	<	catch (InterruptedException success) {
879	<	}
880	<	}
881	<	});
882	<
781	<	t.start();
782	<	Thread.sleep(SHORT_DELAY_MS);
783	<	t.interrupt();
784	<	t.join();
785	<	lock.writeLock().unlock();
869	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
870	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
871	>	public void testAwait_IMSE(boolean fair) {
872	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
873	>	final Condition c = lock.writeLock().newCondition();
874	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
875	>	long startTime = System.nanoTime();
876	>	try {
877	>	await(c, awaitMethod);
878	>	shouldThrow();
879	>	} catch (IllegalMonitorStateException success) {
880	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
881	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
882	>	}
883		}
884
885		/**
886	<	* Calling await without holding lock throws IllegalMonitorStateException
886	>	* Calling signal without holding lock throws IllegalMonitorStateException
887		*/
888	<	public void testAwait_IllegalMonitor() throws InterruptedException {
889	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
889	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
890	>	public void testSignal_IMSE(boolean fair) {
891	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
892		final Condition c = lock.writeLock().newCondition();
893		try {
894	<	c.await();
894	>	c.signal();
895		shouldThrow();
896		} catch (IllegalMonitorStateException success) {}
897		}
898
899		/**
900	<	* Calling signal without holding lock throws IllegalMonitorStateException
900	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
901		*/
902	<	public void testSignal_IllegalMonitor() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
903	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
904	>	public void testSignalAll_IMSE(boolean fair) {
905	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
906		final Condition c = lock.writeLock().newCondition();
907		try {
908	<	c.signal();
908	>	c.signalAll();
909		shouldThrow();
910		} catch (IllegalMonitorStateException success) {}
911		}
#	Line 812 | Line 913 | public class ReentrantReadWriteLockTest
913		/**
914		* awaitNanos without a signal times out
915		*/
916	<	public void testAwaitNanos_Timeout() throws InterruptedException {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918	<	final Condition c = lock.writeLock().newCondition();
919	<
920	<	lock.writeLock().lock();
921	<	long t = c.awaitNanos(100);
922	<	assertTrue(t <= 0);
923	<	lock.writeLock().unlock();
916	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
917	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
918	>	public void testAwaitNanos_Timeout(boolean fair) {
919	>	try {
920	>	final ReentrantReadWriteLock lock =
921	>	new ReentrantReadWriteLock(fair);
922	>	final Condition c = lock.writeLock().newCondition();
923	>	lock.writeLock().lock();
924	>	long startTime = System.nanoTime();
925	>	long timeoutMillis = 10;
926	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
927	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
928	>	assertTrue(nanosRemaining <= 0);
929	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
930	>	lock.writeLock().unlock();
931	>	} catch (InterruptedException e) {
932	>	threadUnexpectedException(e);
933	>	}
934		}
935
825	–
936		/**
937	<	*  timed await without a signal times out
937	>	* timed await without a signal times out
938		*/
939	<	public void testAwait_Timeout() {
940	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
941	<	final Condition c = lock.writeLock().newCondition();
942	<	lock.writeLock().lock();
943	<	lock.writeLock().unlock();
939	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
940	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
941	>	public void testAwait_Timeout(boolean fair) {
942	>	try {
943	>	final ReentrantReadWriteLock lock =
944	>	new ReentrantReadWriteLock(fair);
945	>	final Condition c = lock.writeLock().newCondition();
946	>	lock.writeLock().lock();
947	>	long startTime = System.nanoTime();
948	>	long timeoutMillis = 10;
949	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
950	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
951	>	lock.writeLock().unlock();
952	>	} catch (InterruptedException e) {
953	>	threadUnexpectedException(e);
954	>	}
955		}
956
957		/**
958		* awaitUntil without a signal times out
959		*/
960	<	public void testAwaitUntil_Timeout() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
962	<	final Condition c = lock.writeLock().newCondition();
963	<	lock.writeLock().lock();
964	<	java.util.Date d = new java.util.Date();
965	<	lock.writeLock().unlock();
960	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
961	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
962	>	public void testAwaitUntil_Timeout(boolean fair) {
963	>	try {
964	>	final ReentrantReadWriteLock lock =
965	>	new ReentrantReadWriteLock(fair);
966	>	final Condition c = lock.writeLock().newCondition();
967	>	lock.writeLock().lock();
968	>	long startTime = System.nanoTime();
969	>	long timeoutMillis = 10;
970	>	java.util.Date d = new java.util.Date();
971	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
972	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
973	>	lock.writeLock().unlock();
974	>	} catch (InterruptedException e) {
975	>	threadUnexpectedException(e);
976	>	}
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	<	}
1004	>	awaitTermination(t);
1005		}
1006
1007		/**
1008	<	* awaitUninterruptibly doesn't abort on interrupt
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010	<	public void testAwaitUninterruptibly() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1014		final Condition c = lock.writeLock().newCondition();
1015	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016
1017	<	thread.start();
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.writeLock().lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	c.awaitUninterruptibly();
1024	>	assertTrue(Thread.interrupted());
1025	>	lock.writeLock().unlock();
1026	>	}});
1027	>
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.writeLock().lock();
1032	>	pleaseInterrupt.countDown();
1033	>	c.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.writeLock().unlock();
1036	>	}});
1037
1038	<	while (!thread.lockStarted) {
1039	<	Thread.sleep(100);
1040	<	}
1038	>	await(pleaseInterrupt);
1039	>	lock.writeLock().lock();
1040	>	lock.writeLock().unlock();
1041	>	t2.interrupt();
1042	>
1043	>	assertThreadStaysAlive(t1);
1044	>	assertTrue(t2.isAlive());
1045
1046		lock.writeLock().lock();
1047	<	try {
1048	<	thread.interrupt();
919	<	thread.canAwake = true;
920	<	c.signal();
921	<	} finally {
922	<	lock.writeLock().unlock();
923	<	}
1047	>	c.signalAll();
1048	>	lock.writeLock().unlock();
1049
1050	<	thread.join();
1051	<	assertTrue(thread.interrupted);
927	<	assertFalse(thread.isAlive());
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054		/**
1055	<	* await is interruptible
1055	>	* await/awaitNanos/awaitUntil is interruptible
1056		*/
1057	<	public void testAwait_Interrupt() throws InterruptedException {
1058	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1057	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1058	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1059	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1061	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1063	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1065	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1066	>	final PublicReentrantReadWriteLock lock =
1067	>	new PublicReentrantReadWriteLock(fair);
1068		final Condition c = lock.writeLock().newCondition();
1069	<	Thread t = new Thread(new Runnable() {
1070	<	public void run() {
1071	<	try {
1072	<	lock.writeLock().lock();
1073	<	c.await();
1074	<	lock.writeLock().unlock();
1075	<	threadShouldThrow();
1076	<	}
1077	<	catch (InterruptedException success) {
1078	<	}
1079	<	}
1080	<	});
1069	>	final CountDownLatch locked = new CountDownLatch(1);
1070	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1071	>	public void realRun() throws InterruptedException {
1072	>	lock.writeLock().lock();
1073	>	assertWriteLockedByMoi(lock);
1074	>	assertHasNoWaiters(lock, c);
1075	>	locked.countDown();
1076	>	try {
1077	>	await(c, awaitMethod);
1078	>	} finally {
1079	>	assertWriteLockedByMoi(lock);
1080	>	assertHasNoWaiters(lock, c);
1081	>	lock.writeLock().unlock();
1082	>	assertFalse(Thread.interrupted());
1083	>	}
1084	>	}});
1085
1086	<	t.start();
1087	<	Thread.sleep(SHORT_DELAY_MS);
1086	>	await(locked);
1087	>	assertHasWaiters(lock, c, t);
1088		t.interrupt();
1089	<	t.join(SHORT_DELAY_MS);
1090	<	assertFalse(t.isAlive());
1089	>	awaitTermination(t);
1090	>	assertNotWriteLocked(lock);
1091		}
1092
1093		/**
1094	<	* awaitNanos is interruptible
1094	>	* signalAll wakes up all threads
1095		*/
1096	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1097	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1096	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1097	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1098	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1100	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1102	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1104	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1105	>	final PublicReentrantReadWriteLock lock =
1106	>	new PublicReentrantReadWriteLock(fair);
1107		final Condition c = lock.writeLock().newCondition();
1108	<	Thread t = new Thread(new Runnable() {
1109	<	public void run() {
1110	<	try {
1111	<	lock.writeLock().lock();
1112	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1113	<	lock.writeLock().unlock();
1114	<	threadShouldThrow();
1115	<	}
1116	<	catch (InterruptedException success) {
1117	<	}
972	<	}
973	<	});
1108	>	final CountDownLatch locked = new CountDownLatch(2);
1109	>	final Lock writeLock = lock.writeLock();
1110	>	class Awaiter extends CheckedRunnable {
1111	>	public void realRun() throws InterruptedException {
1112	>	writeLock.lock();
1113	>	locked.countDown();
1114	>	await(c, awaitMethod);
1115	>	writeLock.unlock();
1116	>	}
1117	>	}
1118
1119	<	t.start();
1120	<	Thread.sleep(SHORT_DELAY_MS);
1121	<	t.interrupt();
1122	<	t.join(SHORT_DELAY_MS);
1123	<	assertFalse(t.isAlive());
1119	>	Thread t1 = newStartedThread(new Awaiter());
1120	>	Thread t2 = newStartedThread(new Awaiter());
1121	>
1122	>	await(locked);
1123	>	writeLock.lock();
1124	>	assertHasWaiters(lock, c, t1, t2);
1125	>	c.signalAll();
1126	>	assertHasNoWaiters(lock, c);
1127	>	writeLock.unlock();
1128	>	awaitTermination(t1);
1129	>	awaitTermination(t2);
1130		}
1131
1132		/**
1133	<	* awaitUntil is interruptible
1133	>	* signal wakes up waiting threads in FIFO order
1134		*/
1135	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1136	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1135	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1136	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1137	>	public void testSignalWakesFifo(boolean fair) {
1138	>	final PublicReentrantReadWriteLock lock =
1139	>	new PublicReentrantReadWriteLock(fair);
1140		final Condition c = lock.writeLock().newCondition();
1141	<	Thread t = new Thread(new Runnable() {
1142	<	public void run() {
1143	<	try {
1144	<	lock.writeLock().lock();
1145	<	java.util.Date d = new java.util.Date();
1146	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1147	<	lock.writeLock().unlock();
1148	<	threadShouldThrow();
1149	<	}
1150	<	catch (InterruptedException success) {
1151	<	}
1152	<	}
1153	<	});
1141	>	final CountDownLatch locked1 = new CountDownLatch(1);
1142	>	final CountDownLatch locked2 = new CountDownLatch(1);
1143	>	final Lock writeLock = lock.writeLock();
1144	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1145	>	public void realRun() throws InterruptedException {
1146	>	writeLock.lock();
1147	>	locked1.countDown();
1148	>	c.await();
1149	>	writeLock.unlock();
1150	>	}});
1151	>
1152	>	await(locked1);
1153	>
1154	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1155	>	public void realRun() throws InterruptedException {
1156	>	writeLock.lock();
1157	>	locked2.countDown();
1158	>	c.await();
1159	>	writeLock.unlock();
1160	>	}});
1161
1162	<	t.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1164	<	t.interrupt();
1165	<	t.join(SHORT_DELAY_MS);
1166	<	assertFalse(t.isAlive());
1162	>	await(locked2);
1163	>
1164	>	writeLock.lock();
1165	>	assertHasWaiters(lock, c, t1, t2);
1166	>	assertFalse(lock.hasQueuedThreads());
1167	>	c.signal();
1168	>	assertHasWaiters(lock, c, t2);
1169	>	assertTrue(lock.hasQueuedThread(t1));
1170	>	assertFalse(lock.hasQueuedThread(t2));
1171	>	c.signal();
1172	>	assertHasNoWaiters(lock, c);
1173	>	assertTrue(lock.hasQueuedThread(t1));
1174	>	assertTrue(lock.hasQueuedThread(t2));
1175	>	writeLock.unlock();
1176	>	awaitTermination(t1);
1177	>	awaitTermination(t2);
1178		}
1179
1180		/**
1181	<	* signalAll wakes up all threads
1182	<	*/
1183	<	public void testSignalAll() throws InterruptedException {
1184	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1181	>	* await after multiple reentrant locking preserves lock count
1182	>	*/
1183	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1184	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1185	>	public void testAwaitLockCount(boolean fair) {
1186	>	final PublicReentrantReadWriteLock lock =
1187	>	new PublicReentrantReadWriteLock(fair);
1188		final Condition c = lock.writeLock().newCondition();
1189	<	Thread t1 = new Thread(new Runnable() {
1190	<	public void run() {
1191	<	try {
1192	<	lock.writeLock().lock();
1193	<	c.await();
1194	<	lock.writeLock().unlock();
1195	<	}
1196	<	catch (InterruptedException e) {
1197	<	threadUnexpectedException();
1198	<	}
1199	<	}
1200	<	});
1201	<
1202	<	Thread t2 = new Thread(new Runnable() {
1203	<	public void run() {
1204	<	try {
1205	<	lock.writeLock().lock();
1206	<	c.await();
1207	<	lock.writeLock().unlock();
1208	<	}
1209	<	catch (InterruptedException e) {
1210	<	threadUnexpectedException();
1211	<	}
1212	<	}
1213	<	});
1189	>	final CountDownLatch locked = new CountDownLatch(2);
1190	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1191	>	public void realRun() throws InterruptedException {
1192	>	lock.writeLock().lock();
1193	>	assertWriteLockedByMoi(lock);
1194	>	assertEquals(1, lock.writeLock().getHoldCount());
1195	>	locked.countDown();
1196	>	c.await();
1197	>	assertWriteLockedByMoi(lock);
1198	>	assertEquals(1, lock.writeLock().getHoldCount());
1199	>	lock.writeLock().unlock();
1200	>	}});
1201	>
1202	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1203	>	public void realRun() throws InterruptedException {
1204	>	lock.writeLock().lock();
1205	>	lock.writeLock().lock();
1206	>	assertWriteLockedByMoi(lock);
1207	>	assertEquals(2, lock.writeLock().getHoldCount());
1208	>	locked.countDown();
1209	>	c.await();
1210	>	assertWriteLockedByMoi(lock);
1211	>	assertEquals(2, lock.writeLock().getHoldCount());
1212	>	lock.writeLock().unlock();
1213	>	lock.writeLock().unlock();
1214	>	}});
1215
1216	<	t1.start();
1042	<	t2.start();
1043	<	Thread.sleep(SHORT_DELAY_MS);
1216	>	await(locked);
1217		lock.writeLock().lock();
1218	+	assertHasWaiters(lock, c, t1, t2);
1219		c.signalAll();
1220	+	assertHasNoWaiters(lock, c);
1221		lock.writeLock().unlock();
1222	<	t1.join(SHORT_DELAY_MS);
1223	<	t2.join(SHORT_DELAY_MS);
1049	<	assertFalse(t1.isAlive());
1050	<	assertFalse(t2.isAlive());
1222	>	awaitTermination(t1);
1223	>	awaitTermination(t2);
1224		}
1225
1226		/**
1227		* A serialized lock deserializes as unlocked
1228		*/
1229	<	public void testSerialization() throws Exception {
1230	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1231	<	l.readLock().lock();
1232	<	l.readLock().unlock();
1233	<
1234	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1235	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1236	<	out.writeObject(l);
1237	<	out.close();
1238	<
1239	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1240	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1241	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1242	<	r.readLock().lock();
1243	<	r.readLock().unlock();
1229	>	public void testSerialization()      { testSerialization(false); }
1230	>	public void testSerialization_fair() { testSerialization(true); }
1231	>	public void testSerialization(boolean fair) {
1232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1233	>	lock.writeLock().lock();
1234	>	lock.readLock().lock();
1235	>
1236	>	ReentrantReadWriteLock clone = serialClone(lock);
1237	>	assertEquals(lock.isFair(), clone.isFair());
1238	>	assertTrue(lock.isWriteLocked());
1239	>	assertFalse(clone.isWriteLocked());
1240	>	assertEquals(1, lock.getReadLockCount());
1241	>	assertEquals(0, clone.getReadLockCount());
1242	>	clone.writeLock().lock();
1243	>	clone.readLock().lock();
1244	>	assertTrue(clone.isWriteLocked());
1245	>	assertEquals(1, clone.getReadLockCount());
1246	>	clone.readLock().unlock();
1247	>	clone.writeLock().unlock();
1248	>	assertFalse(clone.isWriteLocked());
1249	>	assertEquals(1, lock.getReadLockCount());
1250	>	assertEquals(0, clone.getReadLockCount());
1251		}
1252
1253		/**
1254		* hasQueuedThreads reports whether there are waiting threads
1255		*/
1256	<	public void testhasQueuedThreads() throws InterruptedException {
1257	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1256	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1257	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1258	>	public void testHasQueuedThreads(boolean fair) {
1259	>	final PublicReentrantReadWriteLock lock =
1260	>	new PublicReentrantReadWriteLock(fair);
1261		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1262		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1263		assertFalse(lock.hasQueuedThreads());
1264		lock.writeLock().lock();
1265	+	assertFalse(lock.hasQueuedThreads());
1266		t1.start();
1267	<	Thread.sleep(SHORT_DELAY_MS);
1267	>	waitForQueuedThread(lock, t1);
1268		assertTrue(lock.hasQueuedThreads());
1269		t2.start();
1270	<	Thread.sleep(SHORT_DELAY_MS);
1270	>	waitForQueuedThread(lock, t2);
1271		assertTrue(lock.hasQueuedThreads());
1272		t1.interrupt();
1273	<	Thread.sleep(SHORT_DELAY_MS);
1273	>	awaitTermination(t1);
1274		assertTrue(lock.hasQueuedThreads());
1275		lock.writeLock().unlock();
1276	<	Thread.sleep(SHORT_DELAY_MS);
1276	>	awaitTermination(t2);
1277		assertFalse(lock.hasQueuedThreads());
1094	–	t1.join();
1095	–	t2.join();
1278		}
1279
1280		/**
1281		* hasQueuedThread(null) throws NPE
1282		*/
1283	<	public void testHasQueuedThreadNPE() {
1284	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1283	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1284	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1285	>	public void testHasQueuedThreadNPE(boolean fair) {
1286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1287		try {
1288	<	sync.hasQueuedThread(null);
1288	>	lock.hasQueuedThread(null);
1289		shouldThrow();
1290	<	} catch (NullPointerException success) {
1107	<	}
1290	>	} catch (NullPointerException success) {}
1291		}
1292
1293		/**
1294	<	* hasQueuedThread reports whether a thread is queued.
1294	>	* hasQueuedThread reports whether a thread is queued
1295		*/
1296	<	public void testHasQueuedThread() throws InterruptedException {
1297	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1298	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1299	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1300	<	assertFalse(sync.hasQueuedThread(t1));
1301	<	assertFalse(sync.hasQueuedThread(t2));
1302	<	sync.writeLock().lock();
1296	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1297	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1298	>	public void testHasQueuedThread(boolean fair) {
1299	>	final PublicReentrantReadWriteLock lock =
1300	>	new PublicReentrantReadWriteLock(fair);
1301	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1302	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1303	>	assertFalse(lock.hasQueuedThread(t1));
1304	>	assertFalse(lock.hasQueuedThread(t2));
1305	>	lock.writeLock().lock();
1306		t1.start();
1307	<	Thread.sleep(SHORT_DELAY_MS);
1308	<	assertTrue(sync.hasQueuedThread(t1));
1307	>	waitForQueuedThread(lock, t1);
1308	>	assertTrue(lock.hasQueuedThread(t1));
1309	>	assertFalse(lock.hasQueuedThread(t2));
1310		t2.start();
1311	<	Thread.sleep(SHORT_DELAY_MS);
1312	<	assertTrue(sync.hasQueuedThread(t1));
1313	<	assertTrue(sync.hasQueuedThread(t2));
1311	>	waitForQueuedThread(lock, t2);
1312	>	assertTrue(lock.hasQueuedThread(t1));
1313	>	assertTrue(lock.hasQueuedThread(t2));
1314		t1.interrupt();
1315	<	Thread.sleep(SHORT_DELAY_MS);
1316	<	assertFalse(sync.hasQueuedThread(t1));
1317	<	assertTrue(sync.hasQueuedThread(t2));
1318	<	sync.writeLock().unlock();
1319	<	Thread.sleep(SHORT_DELAY_MS);
1320	<	assertFalse(sync.hasQueuedThread(t1));
1321	<	Thread.sleep(SHORT_DELAY_MS);
1135	<	assertFalse(sync.hasQueuedThread(t2));
1136	<	t1.join();
1137	<	t2.join();
1315	>	awaitTermination(t1);
1316	>	assertFalse(lock.hasQueuedThread(t1));
1317	>	assertTrue(lock.hasQueuedThread(t2));
1318	>	lock.writeLock().unlock();
1319	>	awaitTermination(t2);
1320	>	assertFalse(lock.hasQueuedThread(t1));
1321	>	assertFalse(lock.hasQueuedThread(t2));
1322		}
1323
1140	–
1324		/**
1325		* getQueueLength reports number of waiting threads
1326		*/
1327	<	public void testGetQueueLength() throws InterruptedException {
1328	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1327	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1328	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1329	>	public void testGetQueueLength(boolean fair) {
1330	>	final PublicReentrantReadWriteLock lock =
1331	>	new PublicReentrantReadWriteLock(fair);
1332		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1333		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1334		assertEquals(0, lock.getQueueLength());
1335		lock.writeLock().lock();
1336		t1.start();
1337	<	Thread.sleep(SHORT_DELAY_MS);
1337	>	waitForQueuedThread(lock, t1);
1338		assertEquals(1, lock.getQueueLength());
1339		t2.start();
1340	<	Thread.sleep(SHORT_DELAY_MS);
1340	>	waitForQueuedThread(lock, t2);
1341		assertEquals(2, lock.getQueueLength());
1342		t1.interrupt();
1343	<	Thread.sleep(SHORT_DELAY_MS);
1343	>	awaitTermination(t1);
1344		assertEquals(1, lock.getQueueLength());
1345		lock.writeLock().unlock();
1346	<	Thread.sleep(SHORT_DELAY_MS);
1346	>	awaitTermination(t2);
1347		assertEquals(0, lock.getQueueLength());
1162	–	t1.join();
1163	–	t2.join();
1348		}
1349
1350		/**
1351		* getQueuedThreads includes waiting threads
1352		*/
1353	<	public void testGetQueuedThreads() throws InterruptedException {
1354	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1353	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1354	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1355	>	public void testGetQueuedThreads(boolean fair) {
1356	>	final PublicReentrantReadWriteLock lock =
1357	>	new PublicReentrantReadWriteLock(fair);
1358		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1359		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1360		assertTrue(lock.getQueuedThreads().isEmpty());
1361		lock.writeLock().lock();
1362		assertTrue(lock.getQueuedThreads().isEmpty());
1363		t1.start();
1364	<	Thread.sleep(SHORT_DELAY_MS);
1364	>	waitForQueuedThread(lock, t1);
1365	>	assertEquals(1, lock.getQueuedThreads().size());
1366		assertTrue(lock.getQueuedThreads().contains(t1));
1367		t2.start();
1368	<	Thread.sleep(SHORT_DELAY_MS);
1368	>	waitForQueuedThread(lock, t2);
1369	>	assertEquals(2, lock.getQueuedThreads().size());
1370		assertTrue(lock.getQueuedThreads().contains(t1));
1371		assertTrue(lock.getQueuedThreads().contains(t2));
1372		t1.interrupt();
1373	<	Thread.sleep(SHORT_DELAY_MS);
1373	>	awaitTermination(t1);
1374		assertFalse(lock.getQueuedThreads().contains(t1));
1375		assertTrue(lock.getQueuedThreads().contains(t2));
1376	+	assertEquals(1, lock.getQueuedThreads().size());
1377		lock.writeLock().unlock();
1378	<	Thread.sleep(SHORT_DELAY_MS);
1378	>	awaitTermination(t2);
1379		assertTrue(lock.getQueuedThreads().isEmpty());
1190	–	t1.join();
1191	–	t2.join();
1380		}
1381
1382		/**
1383		* hasWaiters throws NPE if null
1384		*/
1385	<	public void testHasWaitersNPE() {
1386	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1385	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1386	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1387	>	public void testHasWaitersNPE(boolean fair) {
1388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1389		try {
1390		lock.hasWaiters(null);
1391		shouldThrow();
#	Line 1205 | Line 1395 | public class ReentrantReadWriteLockTest
1395		/**
1396		* getWaitQueueLength throws NPE if null
1397		*/
1398	<	public void testGetWaitQueueLengthNPE() {
1399	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1399	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1400	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1401	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1402		try {
1403		lock.getWaitQueueLength(null);
1404		shouldThrow();
1405		} catch (NullPointerException success) {}
1406		}
1407
1216	–
1408		/**
1409		* getWaitingThreads throws NPE if null
1410		*/
1411	<	public void testGetWaitingThreadsNPE() {
1412	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1411	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1412	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1413	>	public void testGetWaitingThreadsNPE(boolean fair) {
1414	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1415		try {
1416		lock.getWaitingThreads(null);
1417		shouldThrow();
#	Line 1226 | Line 1419 | public class ReentrantReadWriteLockTest
1419		}
1420
1421		/**
1422	<	* hasWaiters throws IAE if not owned
1422	>	* hasWaiters throws IllegalArgumentException if not owned
1423		*/
1424	<	public void testHasWaitersIAE() {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1424	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1425	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1426	>	public void testHasWaitersIAE(boolean fair) {
1427	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1428		final Condition c = lock.writeLock().newCondition();
1429	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1429	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1430		try {
1431		lock2.hasWaiters(c);
1432		shouldThrow();
#	Line 1239 | Line 1434 | public class ReentrantReadWriteLockTest
1434		}
1435
1436		/**
1437	<	* hasWaiters throws IMSE if not locked
1437	>	* hasWaiters throws IllegalMonitorStateException if not locked
1438		*/
1439	<	public void testHasWaitersIMSE() {
1440	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1439	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1440	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1441	>	public void testHasWaitersIMSE(boolean fair) {
1442	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1443		final Condition c = lock.writeLock().newCondition();
1444		try {
1445		lock.hasWaiters(c);
#	Line 1250 | Line 1447 | public class ReentrantReadWriteLockTest
1447		} catch (IllegalMonitorStateException success) {}
1448		}
1449
1253	–
1450		/**
1451	<	* getWaitQueueLength throws IAE if not owned
1451	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1452		*/
1453	<	public void testGetWaitQueueLengthIAE() {
1454	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1453	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1454	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1455	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1456	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1457		final Condition c = lock.writeLock().newCondition();
1458	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1458	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1459		try {
1460		lock2.getWaitQueueLength(c);
1461		shouldThrow();
#	Line 1265 | Line 1463 | public class ReentrantReadWriteLockTest
1463		}
1464
1465		/**
1466	<	* getWaitQueueLength throws IMSE if not locked
1466	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1467		*/
1468	<	public void testGetWaitQueueLengthIMSE() {
1469	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1468	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1469	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1470	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1471	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1472		final Condition c = lock.writeLock().newCondition();
1473		try {
1474		lock.getWaitQueueLength(c);
#	Line 1276 | Line 1476 | public class ReentrantReadWriteLockTest
1476		} catch (IllegalMonitorStateException success) {}
1477		}
1478
1279	–
1479		/**
1480	<	* getWaitingThreads throws IAE if not owned
1480	>	* getWaitingThreads throws IllegalArgumentException if not owned
1481		*/
1482	<	public void testGetWaitingThreadsIAE() {
1483	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1482	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1483	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1484	>	public void testGetWaitingThreadsIAE(boolean fair) {
1485	>	final PublicReentrantReadWriteLock lock =
1486	>	new PublicReentrantReadWriteLock(fair);
1487		final Condition c = lock.writeLock().newCondition();
1488	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1488	>	final PublicReentrantReadWriteLock lock2 =
1489	>	new PublicReentrantReadWriteLock(fair);
1490		try {
1491		lock2.getWaitingThreads(c);
1492		shouldThrow();
#	Line 1291 | Line 1494 | public class ReentrantReadWriteLockTest
1494		}
1495
1496		/**
1497	<	* getWaitingThreads throws IMSE if not locked
1497	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1498		*/
1499	<	public void testGetWaitingThreadsIMSE() {
1500	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1499	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1500	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1501	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1502	>	final PublicReentrantReadWriteLock lock =
1503	>	new PublicReentrantReadWriteLock(fair);
1504		final Condition c = lock.writeLock().newCondition();
1505		try {
1506		lock.getWaitingThreads(c);
#	Line 1302 | Line 1508 | public class ReentrantReadWriteLockTest
1508		} catch (IllegalMonitorStateException success) {}
1509		}
1510
1305	–
1511		/**
1512		* hasWaiters returns true when a thread is waiting, else false
1513		*/
1514	<	public void testHasWaiters() throws InterruptedException {
1515	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1514	>	public void testHasWaiters()      { testHasWaiters(false); }
1515	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1516	>	public void testHasWaiters(boolean fair) {
1517	>	final PublicReentrantReadWriteLock lock =
1518	>	new PublicReentrantReadWriteLock(fair);
1519		final Condition c = lock.writeLock().newCondition();
1520	<	Thread t = new Thread(new Runnable() {
1521	<	public void run() {
1522	<	try {
1523	<	lock.writeLock().lock();
1524	<	threadAssertFalse(lock.hasWaiters(c));
1525	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1526	<	c.await();
1527	<	lock.writeLock().unlock();
1528	<	}
1529	<	catch (InterruptedException e) {
1530	<	threadUnexpectedException();
1531	<	}
1324	<	}
1325	<	});
1520	>	final CountDownLatch locked = new CountDownLatch(1);
1521	>	Thread t = newStartedThread(new CheckedRunnable() {
1522	>	public void realRun() throws InterruptedException {
1523	>	lock.writeLock().lock();
1524	>	assertHasNoWaiters(lock, c);
1525	>	assertFalse(lock.hasWaiters(c));
1526	>	locked.countDown();
1527	>	c.await();
1528	>	assertHasNoWaiters(lock, c);
1529	>	assertFalse(lock.hasWaiters(c));
1530	>	lock.writeLock().unlock();
1531	>	}});
1532
1533	<	t.start();
1328	<	Thread.sleep(SHORT_DELAY_MS);
1533	>	await(locked);
1534		lock.writeLock().lock();
1535	+	assertHasWaiters(lock, c, t);
1536		assertTrue(lock.hasWaiters(c));
1331	–	assertEquals(1, lock.getWaitQueueLength(c));
1537		c.signal();
1538	<	lock.writeLock().unlock();
1334	<	Thread.sleep(SHORT_DELAY_MS);
1335	<	lock.writeLock().lock();
1538	>	assertHasNoWaiters(lock, c);
1539		assertFalse(lock.hasWaiters(c));
1337	–	assertEquals(0, lock.getWaitQueueLength(c));
1540		lock.writeLock().unlock();
1541	<	t.join(SHORT_DELAY_MS);
1542	<	assertFalse(t.isAlive());
1541	>	awaitTermination(t);
1542	>	assertHasNoWaiters(lock, c);
1543		}
1544
1545		/**
1546		* getWaitQueueLength returns number of waiting threads
1547		*/
1548	<	public void testGetWaitQueueLength() throws InterruptedException {
1549	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1548	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1549	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1550	>	public void testGetWaitQueueLength(boolean fair) {
1551	>	final PublicReentrantReadWriteLock lock =
1552	>	new PublicReentrantReadWriteLock(fair);
1553		final Condition c = lock.writeLock().newCondition();
1554	<	Thread t = new Thread(new Runnable() {
1555	<	public void run() {
1556	<	try {
1557	<	lock.writeLock().lock();
1558	<	threadAssertFalse(lock.hasWaiters(c));
1559	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1560	<	c.await();
1561	<	lock.writeLock().unlock();
1562	<	}
1358	<	catch (InterruptedException e) {
1359	<	threadUnexpectedException();
1360	<	}
1361	<	}
1362	<	});
1554	>	final CountDownLatch locked = new CountDownLatch(1);
1555	>	Thread t = newStartedThread(new CheckedRunnable() {
1556	>	public void realRun() throws InterruptedException {
1557	>	lock.writeLock().lock();
1558	>	assertEquals(0, lock.getWaitQueueLength(c));
1559	>	locked.countDown();
1560	>	c.await();
1561	>	lock.writeLock().unlock();
1562	>	}});
1563
1564	<	t.start();
1365	<	Thread.sleep(SHORT_DELAY_MS);
1564	>	await(locked);
1565		lock.writeLock().lock();
1566	<	assertTrue(lock.hasWaiters(c));
1566	>	assertHasWaiters(lock, c, t);
1567		assertEquals(1, lock.getWaitQueueLength(c));
1568		c.signal();
1569	<	lock.writeLock().unlock();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	lock.writeLock().lock();
1373	<	assertFalse(lock.hasWaiters(c));
1569	>	assertHasNoWaiters(lock, c);
1570		assertEquals(0, lock.getWaitQueueLength(c));
1571		lock.writeLock().unlock();
1572	<	t.join(SHORT_DELAY_MS);
1377	<	assertFalse(t.isAlive());
1572	>	awaitTermination(t);
1573		}
1574
1380	–
1575		/**
1576		* getWaitingThreads returns only and all waiting threads
1577		*/
1578	<	public void testGetWaitingThreads() throws InterruptedException {
1579	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1578	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1579	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1580	>	public void testGetWaitingThreads(boolean fair) {
1581	>	final PublicReentrantReadWriteLock lock =
1582	>	new PublicReentrantReadWriteLock(fair);
1583		final Condition c = lock.writeLock().newCondition();
1584	<	Thread t1 = new Thread(new Runnable() {
1585	<	public void run() {
1586	<	try {
1587	<	lock.writeLock().lock();
1588	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1589	<	c.await();
1590	<	lock.writeLock().unlock();
1591	<	}
1592	<	catch (InterruptedException e) {
1593	<	threadUnexpectedException();
1594	<	}
1595	<	}
1596	<	});
1597	<
1598	<	Thread t2 = new Thread(new Runnable() {
1599	<	public void run() {
1600	<	try {
1601	<	lock.writeLock().lock();
1602	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1406	<	c.await();
1407	<	lock.writeLock().unlock();
1408	<	}
1409	<	catch (InterruptedException e) {
1410	<	threadUnexpectedException();
1411	<	}
1412	<	}
1413	<	});
1584	>	final CountDownLatch locked1 = new CountDownLatch(1);
1585	>	final CountDownLatch locked2 = new CountDownLatch(1);
1586	>	Thread t1 = new Thread(new CheckedRunnable() {
1587	>	public void realRun() throws InterruptedException {
1588	>	lock.writeLock().lock();
1589	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1590	>	locked1.countDown();
1591	>	c.await();
1592	>	lock.writeLock().unlock();
1593	>	}});
1594	>
1595	>	Thread t2 = new Thread(new CheckedRunnable() {
1596	>	public void realRun() throws InterruptedException {
1597	>	lock.writeLock().lock();
1598	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1599	>	locked2.countDown();
1600	>	c.await();
1601	>	lock.writeLock().unlock();
1602	>	}});
1603
1604		lock.writeLock().lock();
1605		assertTrue(lock.getWaitingThreads(c).isEmpty());
1606		lock.writeLock().unlock();
1607	+
1608		t1.start();
1609	<	Thread.sleep(SHORT_DELAY_MS);
1609	>	await(locked1);
1610		t2.start();
1611	<	Thread.sleep(SHORT_DELAY_MS);
1611	>	await(locked2);
1612	>
1613		lock.writeLock().lock();
1614		assertTrue(lock.hasWaiters(c));
1615		assertTrue(lock.getWaitingThreads(c).contains(t1));
1616		assertTrue(lock.getWaitingThreads(c).contains(t2));
1617	+	assertEquals(2, lock.getWaitingThreads(c).size());
1618		c.signalAll();
1619	+	assertHasNoWaiters(lock, c);
1620		lock.writeLock().unlock();
1621	<	Thread.sleep(SHORT_DELAY_MS);
1622	<	lock.writeLock().lock();
1623	<	assertFalse(lock.hasWaiters(c));
1624	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1625	<	lock.writeLock().unlock();
1433	<	t1.join(SHORT_DELAY_MS);
1434	<	t2.join(SHORT_DELAY_MS);
1435	<	assertFalse(t1.isAlive());
1436	<	assertFalse(t2.isAlive());
1621	>
1622	>	awaitTermination(t1);
1623	>	awaitTermination(t2);
1624	>
1625	>	assertHasNoWaiters(lock, c);
1626		}
1627
1628		/**
1629		* toString indicates current lock state
1630		*/
1631	<	public void testToString() {
1632	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1633	<	String us = lock.toString();
1634	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1635	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1636	<	lock.writeLock().lock();
1637	<	String ws = lock.toString();
1638	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1639	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1631	>	public void testToString()      { testToString(false); }
1632	>	public void testToString_fair() { testToString(true); }
1633	>	public void testToString(boolean fair) {
1634	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1635	>	assertTrue(lock.toString().contains("Write locks = 0"));
1636	>	assertTrue(lock.toString().contains("Read locks = 0"));
1637	>	lock.writeLock().lock();
1638	>	assertTrue(lock.toString().contains("Write locks = 1"));
1639	>	assertTrue(lock.toString().contains("Read locks = 0"));
1640		lock.writeLock().unlock();
1641		lock.readLock().lock();
1642		lock.readLock().lock();
1643	<	String rs = lock.toString();
1644	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1456	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1643	>	assertTrue(lock.toString().contains("Write locks = 0"));
1644	>	assertTrue(lock.toString().contains("Read locks = 2"));
1645		}
1646
1647		/**
1648		* readLock.toString indicates current lock state
1649		*/
1650	<	public void testReadLockToString() {
1651	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1652	<	String us = lock.readLock().toString();
1653	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1650	>	public void testReadLockToString()      { testReadLockToString(false); }
1651	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1652	>	public void testReadLockToString(boolean fair) {
1653	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1654	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1655		lock.readLock().lock();
1656		lock.readLock().lock();
1657	<	String rs = lock.readLock().toString();
1469	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1657	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1658		}
1659
1660		/**
1661		* writeLock.toString indicates current lock state
1662		*/
1663	<	public void testWriteLockToString() {
1664	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1665	<	String us = lock.writeLock().toString();
1666	<	assertTrue(us.indexOf("Unlocked") >= 0);
1663	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1664	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1665	>	public void testWriteLockToString(boolean fair) {
1666	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1667	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1668		lock.writeLock().lock();
1669	<	String ls = lock.writeLock().toString();
1670	<	assertTrue(ls.indexOf("Locked") >= 0);
1669	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1670	>	lock.writeLock().unlock();
1671	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672		}
1673
1674		}

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