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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.83 by jsr166, Sun Sep 22 01:59:57 2019 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	<	import java.util.concurrent.locks.*;
10	<	import java.util.concurrent.*;
11	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	+	import java.util.Arrays;
12	+	import java.util.Collection;
13	+	import java.util.HashSet;
14	+	import java.util.concurrent.Callable;
15	+	import java.util.concurrent.CountDownLatch;
16	+	import java.util.concurrent.atomic.AtomicBoolean;
17	+	import java.util.concurrent.locks.Condition;
18	+	import java.util.concurrent.locks.Lock;
19	+	import java.util.concurrent.locks.ReentrantReadWriteLock;
20	+
21	+	import junit.framework.Test;
22	+	import junit.framework.TestSuite;
23	+
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class ReentrantReadWriteLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30	<	return new TestSuite(ReentrantReadWriteLockTest.class);
30	>	return new TestSuite(ReentrantReadWriteLockTest.class);
31		}
32
33	<	static int HOLD_COUNT_TEST_LIMIT = 20;
34	<
23	<	/*
24	<	* Unlocks an unlocked lock, throws Illegal Monitor State
25	<	*
33	>	/**
34	>	* A runnable calling lockInterruptibly
35		*/
36	<	public void testIllegalMonitorStateException(){
37	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
38	<	try{
39	<	rl.writeLock().unlock();
40	<	fail("Should of thown Illegal Monitor State Exception");
36	>	class InterruptibleLockRunnable extends CheckedRunnable {
37	>	final ReentrantReadWriteLock lock;
38	>	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
39	>	public void realRun() throws InterruptedException {
40	>	lock.writeLock().lockInterruptibly();
41	>	}
42	>	}
43
44	<	}catch(IllegalMonitorStateException success){}
44	>	/**
45	>	* A runnable calling lockInterruptibly that expects to be
46	>	* interrupted
47	>	*/
48	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
49	>	final ReentrantReadWriteLock lock;
50	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
51	>	public void realRun() throws InterruptedException {
52	>	lock.writeLock().lockInterruptibly();
53	>	}
54		}
55
56	+	/**
57	+	* Subclass to expose protected methods
58	+	*/
59	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
60	+	PublicReentrantReadWriteLock() { super(); }
61	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
62	+	public Thread getOwner() {
63	+	return super.getOwner();
64	+	}
65	+	public Collection<Thread> getQueuedThreads() {
66	+	return super.getQueuedThreads();
67	+	}
68	+	public Collection<Thread> getWaitingThreads(Condition c) {
69	+	return super.getWaitingThreads(c);
70	+	}
71	+	}
72
73	+	/**
74	+	* Releases write lock, checking that it had a hold count of 1.
75	+	*/
76	+	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
77	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
78	+	assertWriteLockedByMoi(lock);
79	+	assertEquals(1, lock.getWriteHoldCount());
80	+	writeLock.unlock();
81	+	assertNotWriteLocked(lock);
82	+	}
83
84	<	public void testInterruptedException(){
85	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
86	<	lock.writeLock().lock();
87	<	Thread t = new Thread(new Runnable() {
88	<	public void run(){
89	<	try{
90	<	lock.writeLock().lockInterruptibly();
91	<	threadFail("should throw");
92	<	}catch(InterruptedException success){}
47	<	}
48	<	});
49	<	try {
50	<	t.start();
51	<	t.interrupt();
52	<	lock.writeLock().unlock();
53	<	t.join();
54	<	} catch(Exception e){
55	<	fail("unexpected exception");
56	<	}
57	<	}
58	<
59	<	public void testInterruptedException2(){
60	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
61	<	lock.writeLock().lock();
62	<	Thread t = new Thread(new Runnable() {
63	<	public void run(){
64	<	try{
65	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
66	<	threadFail("should throw");
67	<	}catch(InterruptedException success){}
68	<	}
69	<	});
70	<	try {
71	<	t.start();
72	<	t.interrupt();
73	<	lock.writeLock().unlock();
74	<	t.join();
75	<	} catch(Exception e){
76	<	fail("unexpected exception");
84	>	/**
85	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
86	>	*/
87	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
88	>	long startTime = System.nanoTime();
89	>	while (!lock.hasQueuedThread(t)) {
90	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
91	>	throw new AssertionError("timed out");
92	>	Thread.yield();
93		}
94	+	assertTrue(t.isAlive());
95	+	assertNotSame(t, lock.getOwner());
96		}
97
98	<	public void testInterruptedException3(){
99	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
100	<	lock.writeLock().lock();
101	<	Thread t = new Thread(new Runnable() {
102	<	public void run(){
103	<	try{
104	<	lock.readLock().lockInterruptibly();
105	<	threadFail("should throw");
106	<	}catch(InterruptedException success){}
107	<	}
108	<	});
109	<	try {
110	<	t.start();
111	<	t.interrupt();
112	<	lock.writeLock().unlock();
113	<	t.join();
114	<	} catch(Exception e){
115	<	fail("unexpected exception");
116	<	}
117	<	}
118	<
119	<	public void testInterruptedException4(){
120	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
121	<	lock.writeLock().lock();
122	<	Thread t = new Thread(new Runnable() {
123	<	public void run(){
124	<	try{
125	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
126	<	threadFail("should throw");
127	<	}catch(InterruptedException success){}
128	<	}
129	<	});
130	<	try {
131	<	t.start();
132	<	t.interrupt();
133	<	t.join();
134	<	} catch(Exception e){
135	<	fail("unexpected exception");
98	>	/**
99	>	* Checks that lock is not write-locked.
100	>	*/
101	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
102	>	assertFalse(lock.isWriteLocked());
103	>	assertFalse(lock.isWriteLockedByCurrentThread());
104	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
105	>	assertEquals(0, lock.getWriteHoldCount());
106	>	assertEquals(0, lock.writeLock().getHoldCount());
107	>	assertNull(lock.getOwner());
108	>	}
109	>
110	>	/**
111	>	* Checks that lock is write-locked by the given thread.
112	>	*/
113	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
114	>	assertTrue(lock.isWriteLocked());
115	>	assertSame(t, lock.getOwner());
116	>	assertEquals(t == Thread.currentThread(),
117	>	lock.isWriteLockedByCurrentThread());
118	>	assertEquals(t == Thread.currentThread(),
119	>	lock.writeLock().isHeldByCurrentThread());
120	>	assertEquals(t == Thread.currentThread(),
121	>	lock.getWriteHoldCount() > 0);
122	>	assertEquals(t == Thread.currentThread(),
123	>	lock.writeLock().getHoldCount() > 0);
124	>	assertEquals(0, lock.getReadLockCount());
125	>	}
126	>
127	>	/**
128	>	* Checks that lock is write-locked by the current thread.
129	>	*/
130	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
131	>	assertWriteLockedBy(lock, Thread.currentThread());
132	>	}
133	>
134	>	/**
135	>	* Checks that condition c has no waiters.
136	>	*/
137	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
138	>	assertHasWaiters(lock, c, new Thread[] {});
139	>	}
140	>
141	>	/**
142	>	* Checks that condition c has exactly the given waiter threads.
143	>	*/
144	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
145	>	Thread... threads) {
146	>	lock.writeLock().lock();
147	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
148	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
149	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
150	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
151	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
152	>	new HashSet<Thread>(Arrays.asList(threads)));
153	>	lock.writeLock().unlock();
154	>	}
155	>
156	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
157	>
158	>	/**
159	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
160	>	*/
161	>	void await(Condition c, AwaitMethod awaitMethod)
162	>	throws InterruptedException {
163	>	long timeoutMillis = 2 * LONG_DELAY_MS;
164	>	switch (awaitMethod) {
165	>	case await:
166	>	c.await();
167	>	break;
168	>	case awaitTimed:
169	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
170	>	break;
171	>	case awaitNanos:
172	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
173	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
174	>	assertTrue(nanosRemaining > timeoutNanos / 2);
175	>	assertTrue(nanosRemaining <= timeoutNanos);
176	>	break;
177	>	case awaitUntil:
178	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
179	>	break;
180	>	default:
181	>	throw new AssertionError();
182		}
183		}
184
185	<
186	<	public void testTryLockWhenLocked() {
187	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
188	<	lock.writeLock().lock();
189	<	Thread t = new Thread(new Runnable() {
190	<	public void run(){
191	<	threadAssertFalse(lock.writeLock().tryLock());
192	<	}
193	<	});
194	<	try {
195	<	t.start();
196	<	t.join();
185	>	/**
186	>	* Constructor sets given fairness, and is in unlocked state
187	>	*/
188	>	public void testConstructor() {
189	>	PublicReentrantReadWriteLock lock;
190	>
191	>	lock = new PublicReentrantReadWriteLock();
192	>	assertFalse(lock.isFair());
193	>	assertNotWriteLocked(lock);
194	>	assertEquals(0, lock.getReadLockCount());
195	>
196	>	lock = new PublicReentrantReadWriteLock(true);
197	>	assertTrue(lock.isFair());
198	>	assertNotWriteLocked(lock);
199	>	assertEquals(0, lock.getReadLockCount());
200	>
201	>	lock = new PublicReentrantReadWriteLock(false);
202	>	assertFalse(lock.isFair());
203	>	assertNotWriteLocked(lock);
204	>	assertEquals(0, lock.getReadLockCount());
205	>	}
206	>
207	>	/**
208	>	* write-locking and read-locking an unlocked lock succeed
209	>	*/
210	>	public void testLock()      { testLock(false); }
211	>	public void testLock_fair() { testLock(true); }
212	>	public void testLock(boolean fair) {
213	>	PublicReentrantReadWriteLock lock =
214	>	new PublicReentrantReadWriteLock(fair);
215	>	assertNotWriteLocked(lock);
216	>	lock.writeLock().lock();
217	>	assertWriteLockedByMoi(lock);
218	>	lock.writeLock().unlock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(0, lock.getReadLockCount());
221	>	lock.readLock().lock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(1, lock.getReadLockCount());
224	>	lock.readLock().unlock();
225	>	assertNotWriteLocked(lock);
226	>	assertEquals(0, lock.getReadLockCount());
227	>	}
228	>
229	>	/**
230	>	* getWriteHoldCount returns number of recursive holds
231	>	*/
232	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
233	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
234	>	public void testGetWriteHoldCount(boolean fair) {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
236	>	for (int i = 1; i <= SIZE; i++) {
237	>	lock.writeLock().lock();
238	>	assertEquals(i,lock.getWriteHoldCount());
239	>	}
240	>	for (int i = SIZE; i > 0; i--) {
241		lock.writeLock().unlock();
242	<	} catch(Exception e){
135	<	fail("unexpected exception");
242	>	assertEquals(i - 1,lock.getWriteHoldCount());
243		}
244	<	}
244	>	}
245
246	<	public void testTryLockWhenLocked2() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	<	lock.writeLock().lock();
249	<	Thread t = new Thread(new Runnable() {
250	<	public void run(){
251	<	threadAssertFalse(lock.readLock().tryLock());
252	<	}
253	<	});
254	<	try {
255	<	t.start();
256	<	t.join();
246	>	/**
247	>	* writelock.getHoldCount returns number of recursive holds
248	>	*/
249	>	public void testGetHoldCount()      { testGetHoldCount(false); }
250	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
251	>	public void testGetHoldCount(boolean fair) {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
253	>	for (int i = 1; i <= SIZE; i++) {
254	>	lock.writeLock().lock();
255	>	assertEquals(i,lock.writeLock().getHoldCount());
256	>	}
257	>	for (int i = SIZE; i > 0; i--) {
258		lock.writeLock().unlock();
259	<	} catch(Exception e){
152	<	fail("unexpected exception");
259	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
260		}
261	<	}
261	>	}
262
263	<	public void testMultipleReadLocks() {
264	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
265	<	lock.readLock().lock();
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run(){
268	<	threadAssertTrue(lock.readLock().tryLock());
269	<	lock.readLock().unlock();
270	<	}
271	<	});
272	<	try {
273	<	t.start();
274	<	t.join();
263	>	/**
264	>	* getReadHoldCount returns number of recursive holds
265	>	*/
266	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
267	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
268	>	public void testGetReadHoldCount(boolean fair) {
269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
270	>	for (int i = 1; i <= SIZE; i++) {
271	>	lock.readLock().lock();
272	>	assertEquals(i,lock.getReadHoldCount());
273	>	}
274	>	for (int i = SIZE; i > 0; i--) {
275		lock.readLock().unlock();
276	<	} catch(Exception e){
170	<	fail("unexpected exception");
276	>	assertEquals(i - 1,lock.getReadHoldCount());
277		}
278	<	}
173	<
174	<	public void testWriteAfterMultipleReadLocks() {
175	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
176	<	lock.readLock().lock();
177	<	Thread t1 = new Thread(new Runnable() {
178	<	public void run(){
179	<	lock.readLock().lock();
180	<	lock.readLock().unlock();
181	<	}
182	<	});
183	<	Thread t2 = new Thread(new Runnable() {
184	<	public void run(){
185	<	lock.writeLock().lock();
186	<	lock.writeLock().unlock();
187	<	}
188	<	});
278	>	}
279
280	+	/**
281	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
282	+	*/
283	+	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
284	+	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
285	+	public void testWriteUnlock_IMSE(boolean fair) {
286	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
287		try {
191	–	t1.start();
192	–	t2.start();
193	–	Thread.sleep(SHORT_DELAY_MS);
194	–	lock.readLock().unlock();
195	–	t1.join(MEDIUM_DELAY_MS);
196	–	t2.join(MEDIUM_DELAY_MS);
197	–	assertTrue(!t1.isAlive());
198	–	assertTrue(!t2.isAlive());
199	–
200	–	} catch(Exception e){
201	–	fail("unexpected exception");
202	–	}
203	–	}
204	–
205	–	public void testReadAfterWriteLock() {
206	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
207	–	lock.writeLock().lock();
208	–	Thread t1 = new Thread(new Runnable() {
209	–	public void run(){
210	–	lock.readLock().lock();
211	–	lock.readLock().unlock();
212	–	}
213	–	});
214	–	Thread t2 = new Thread(new Runnable() {
215	–	public void run(){
216	–	lock.readLock().lock();
217	–	lock.readLock().unlock();
218	–	}
219	–	});
220	–
221	–	try {
222	–	t1.start();
223	–	t2.start();
224	–	Thread.sleep(SHORT_DELAY_MS);
288		lock.writeLock().unlock();
289	<	t1.join(MEDIUM_DELAY_MS);
290	<	t2.join(MEDIUM_DELAY_MS);
291	<	assertTrue(!t1.isAlive());
292	<	assertTrue(!t2.isAlive());
293	<
294	<	} catch(Exception e){
295	<	fail("unexpected exception");
296	<	}
297	<	}
298	<
299	<
237	<	public void testTryLockWhenReadLocked() {
238	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
239	<	lock.readLock().lock();
240	<	Thread t = new Thread(new Runnable() {
241	<	public void run(){
242	<	threadAssertTrue(lock.readLock().tryLock());
243	<	lock.readLock().unlock();
244	<	}
245	<	});
289	>	shouldThrow();
290	>	} catch (IllegalMonitorStateException success) {}
291	>	}
292	>
293	>	/**
294	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
295	>	*/
296	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
297	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
298	>	public void testReadUnlock_IMSE(boolean fair) {
299	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
300		try {
247	–	t.start();
248	–	t.join();
301		lock.readLock().unlock();
302	<	} catch(Exception e){
303	<	fail("unexpected exception");
304	<	}
305	<	}
302	>	shouldThrow();
303	>	} catch (IllegalMonitorStateException success) {}
304	>	}
305	>
306	>	/**
307	>	* write-lockInterruptibly is interruptible
308	>	*/
309	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
310	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
311	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
312	>	final PublicReentrantReadWriteLock lock =
313	>	new PublicReentrantReadWriteLock(fair);
314	>	lock.writeLock().lock();
315	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
316	>	public void realRun() throws InterruptedException {
317	>	lock.writeLock().lockInterruptibly();
318	>	}});
319	>
320	>	waitForQueuedThread(lock, t);
321	>	t.interrupt();
322	>	awaitTermination(t);
323	>	releaseWriteLock(lock);
324	>	}
325
326	<
326	>	/**
327	>	* timed write-tryLock is interruptible
328	>	*/
329	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
330	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
331	>	public void testWriteTryLock_Interruptible(boolean fair) {
332	>	final PublicReentrantReadWriteLock lock =
333	>	new PublicReentrantReadWriteLock(fair);
334	>	lock.writeLock().lock();
335	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
336	>	public void realRun() throws InterruptedException {
337	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
338	>	}});
339	>
340	>	waitForQueuedThread(lock, t);
341	>	t.interrupt();
342	>	awaitTermination(t);
343	>	releaseWriteLock(lock);
344	>	}
345
346	<	public void testWriteTryLockWhenReadLocked() {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	<	lock.readLock().lock();
349	<	Thread t = new Thread(new Runnable() {
350	<	public void run(){
351	<	threadAssertFalse(lock.writeLock().tryLock());
352	<	}
353	<	});
354	<	try {
355	<	t.start();
356	<	t.join();
357	<	lock.readLock().unlock();
358	<	} catch(Exception e){
359	<	fail("unexpected exception");
360	<	}
361	<	}
346	>	/**
347	>	* read-lockInterruptibly is interruptible
348	>	*/
349	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
350	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
351	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
352	>	final PublicReentrantReadWriteLock lock =
353	>	new PublicReentrantReadWriteLock(fair);
354	>	lock.writeLock().lock();
355	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
356	>	public void realRun() throws InterruptedException {
357	>	lock.readLock().lockInterruptibly();
358	>	}});
359	>
360	>	waitForQueuedThread(lock, t);
361	>	t.interrupt();
362	>	awaitTermination(t);
363	>	releaseWriteLock(lock);
364	>	}
365
366	<
366	>	/**
367	>	* timed read-tryLock is interruptible
368	>	*/
369	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
370	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
371	>	public void testReadTryLock_Interruptible(boolean fair) {
372	>	final PublicReentrantReadWriteLock lock =
373	>	new PublicReentrantReadWriteLock(fair);
374	>	lock.writeLock().lock();
375	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
376	>	public void realRun() throws InterruptedException {
377	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
378	>	}});
379	>
380	>	waitForQueuedThread(lock, t);
381	>	t.interrupt();
382	>	awaitTermination(t);
383	>	releaseWriteLock(lock);
384	>	}
385
386	<	public void testTryLock_Timeout(){
387	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
388	<	lock.writeLock().lock();
389	<	Thread t = new Thread(new Runnable() {
390	<	public void run(){
391	<	try {
392	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
393	<	} catch (Exception ex) {
394	<	threadFail("unexpected exception");
395	<	}
396	<	}
397	<	});
398	<	try {
399	<	t.start();
400	<	t.join();
291	<	lock.writeLock().unlock();
292	<	} catch(Exception e){
293	<	fail("unexpected exception");
294	<	}
295	<	}
386	>	/**
387	>	* write-tryLock on an unlocked lock succeeds
388	>	*/
389	>	public void testWriteTryLock()      { testWriteTryLock(false); }
390	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
391	>	public void testWriteTryLock(boolean fair) {
392	>	final PublicReentrantReadWriteLock lock =
393	>	new PublicReentrantReadWriteLock(fair);
394	>	assertTrue(lock.writeLock().tryLock());
395	>	assertWriteLockedByMoi(lock);
396	>	assertTrue(lock.writeLock().tryLock());
397	>	assertWriteLockedByMoi(lock);
398	>	lock.writeLock().unlock();
399	>	releaseWriteLock(lock);
400	>	}
401
402	<	public void testTryLock_Timeout2(){
403	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	<	lock.writeLock().lock();
405	<	Thread t = new Thread(new Runnable() {
406	<	public void run(){
407	<	try {
408	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
409	<	} catch (Exception ex) {
410	<	threadFail("unexpected exception");
411	<	}
412	<	}
413	<	});
414	<	try {
310	<	t.start();
311	<	t.join();
312	<	lock.writeLock().unlock();
313	<	} catch(Exception e){
314	<	fail("unexpected exception");
315	<	}
316	<	}
402	>	/**
403	>	* write-tryLock fails if locked
404	>	*/
405	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
406	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
407	>	public void testWriteTryLockWhenLocked(boolean fair) {
408	>	final PublicReentrantReadWriteLock lock =
409	>	new PublicReentrantReadWriteLock(fair);
410	>	lock.writeLock().lock();
411	>	Thread t = newStartedThread(new CheckedRunnable() {
412	>	public void realRun() {
413	>	assertFalse(lock.writeLock().tryLock());
414	>	}});
415
416	+	awaitTermination(t);
417	+	releaseWriteLock(lock);
418	+	}
419	+
420	+	/**
421	+	* read-tryLock fails if locked
422	+	*/
423	+	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
424	+	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
425	+	public void testReadTryLockWhenLocked(boolean fair) {
426	+	final PublicReentrantReadWriteLock lock =
427	+	new PublicReentrantReadWriteLock(fair);
428	+	lock.writeLock().lock();
429	+	Thread t = newStartedThread(new CheckedRunnable() {
430	+	public void realRun() {
431	+	assertFalse(lock.readLock().tryLock());
432	+	}});
433	+
434	+	awaitTermination(t);
435	+	releaseWriteLock(lock);
436	+	}
437	+
438	+	/**
439	+	* Multiple threads can hold a read lock when not write-locked
440	+	*/
441	+	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
442	+	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
443	+	public void testMultipleReadLocks(boolean fair) {
444	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
445	+	lock.readLock().lock();
446	+	Thread t = newStartedThread(new CheckedRunnable() {
447	+	public void realRun() throws InterruptedException {
448	+	assertTrue(lock.readLock().tryLock());
449	+	lock.readLock().unlock();
450	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
451	+	lock.readLock().unlock();
452	+	lock.readLock().lock();
453	+	lock.readLock().unlock();
454	+	}});
455	+
456	+	awaitTermination(t);
457	+	lock.readLock().unlock();
458	+	}
459	+
460	+	/**
461	+	* A writelock succeeds only after a reading thread unlocks
462	+	*/
463	+	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
464	+	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
465	+	public void testWriteAfterReadLock(boolean fair) {
466	+	final PublicReentrantReadWriteLock lock =
467	+	new PublicReentrantReadWriteLock(fair);
468	+	lock.readLock().lock();
469	+	Thread t = newStartedThread(new CheckedRunnable() {
470	+	public void realRun() {
471	+	assertEquals(1, lock.getReadLockCount());
472	+	lock.writeLock().lock();
473	+	assertEquals(0, lock.getReadLockCount());
474	+	lock.writeLock().unlock();
475	+	}});
476	+	waitForQueuedThread(lock, t);
477	+	assertNotWriteLocked(lock);
478	+	assertEquals(1, lock.getReadLockCount());
479	+	lock.readLock().unlock();
480	+	assertEquals(0, lock.getReadLockCount());
481	+	awaitTermination(t);
482	+	assertNotWriteLocked(lock);
483	+	}
484	+
485	+	/**
486	+	* A writelock succeeds only after reading threads unlock
487	+	*/
488	+	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
489	+	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
490	+	public void testWriteAfterMultipleReadLocks(boolean fair) {
491	+	final PublicReentrantReadWriteLock lock =
492	+	new PublicReentrantReadWriteLock(fair);
493	+	lock.readLock().lock();
494	+	lock.readLock().lock();
495	+	Thread t1 = newStartedThread(new CheckedRunnable() {
496	+	public void realRun() {
497	+	lock.readLock().lock();
498	+	assertEquals(3, lock.getReadLockCount());
499	+	lock.readLock().unlock();
500	+	}});
501	+	awaitTermination(t1);
502	+
503	+	Thread t2 = newStartedThread(new CheckedRunnable() {
504	+	public void realRun() {
505	+	assertEquals(2, lock.getReadLockCount());
506	+	lock.writeLock().lock();
507	+	assertEquals(0, lock.getReadLockCount());
508	+	lock.writeLock().unlock();
509	+	}});
510	+	waitForQueuedThread(lock, t2);
511	+	assertNotWriteLocked(lock);
512	+	assertEquals(2, lock.getReadLockCount());
513	+	lock.readLock().unlock();
514	+	lock.readLock().unlock();
515	+	assertEquals(0, lock.getReadLockCount());
516	+	awaitTermination(t2);
517	+	assertNotWriteLocked(lock);
518	+	}
519	+
520	+	/**
521	+	* A thread that tries to acquire a fair read lock (non-reentrantly)
522	+	* will block if there is a waiting writer thread
523	+	*/
524	+	public void testReaderWriterReaderFairFifo() {
525	+	final PublicReentrantReadWriteLock lock =
526	+	new PublicReentrantReadWriteLock(true);
527	+	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
528	+
529	+	lock.readLock().lock();
530	+	Thread t1 = newStartedThread(new CheckedRunnable() {
531	+	public void realRun() {
532	+	assertEquals(1, lock.getReadLockCount());
533	+	lock.writeLock().lock();
534	+	assertEquals(0, lock.getReadLockCount());
535	+	t1GotLock.set(true);
536	+	lock.writeLock().unlock();
537	+	}});
538	+	waitForQueuedThread(lock, t1);
539	+
540	+	Thread t2 = newStartedThread(new CheckedRunnable() {
541	+	public void realRun() {
542	+	assertEquals(1, lock.getReadLockCount());
543	+	lock.readLock().lock();
544	+	assertEquals(1, lock.getReadLockCount());
545	+	assertTrue(t1GotLock.get());
546	+	lock.readLock().unlock();
547	+	}});
548	+	waitForQueuedThread(lock, t2);
549	+	assertTrue(t1.isAlive());
550	+	assertNotWriteLocked(lock);
551	+	assertEquals(1, lock.getReadLockCount());
552	+	lock.readLock().unlock();
553	+	awaitTermination(t1);
554	+	awaitTermination(t2);
555	+	assertNotWriteLocked(lock);
556	+	}
557
558	<	public void testLockInterruptibly() {
559	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
560	<	try {
558	>	/**
559	>	* Readlocks succeed only after a writing thread unlocks
560	>	*/
561	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
562	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
563	>	public void testReadAfterWriteLock(boolean fair) {
564	>	final PublicReentrantReadWriteLock lock =
565	>	new PublicReentrantReadWriteLock(fair);
566	>	lock.writeLock().lock();
567	>	Thread t1 = newStartedThread(new CheckedRunnable() {
568	>	public void realRun() {
569	>	lock.readLock().lock();
570	>	lock.readLock().unlock();
571	>	}});
572	>	Thread t2 = newStartedThread(new CheckedRunnable() {
573	>	public void realRun() {
574	>	lock.readLock().lock();
575	>	lock.readLock().unlock();
576	>	}});
577	>
578	>	waitForQueuedThread(lock, t1);
579	>	waitForQueuedThread(lock, t2);
580	>	releaseWriteLock(lock);
581	>	awaitTermination(t1);
582	>	awaitTermination(t2);
583	>	}
584	>
585	>	/**
586	>	* Read trylock succeeds if write locked by current thread
587	>	*/
588	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
589	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
590	>	public void testReadHoldingWriteLock(boolean fair) {
591	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
592	>	lock.writeLock().lock();
593	>	assertTrue(lock.readLock().tryLock());
594	>	lock.readLock().unlock();
595	>	lock.writeLock().unlock();
596	>	}
597	>
598	>	/**
599	>	* Read trylock succeeds (barging) even in the presence of waiting
600	>	* readers and/or writers
601	>	*/
602	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
603	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
604	>	public void testReadTryLockBarging(boolean fair) {
605	>	final PublicReentrantReadWriteLock lock =
606	>	new PublicReentrantReadWriteLock(fair);
607	>	lock.readLock().lock();
608	>
609	>	Thread t1 = newStartedThread(new CheckedRunnable() {
610	>	public void realRun() {
611	>	lock.writeLock().lock();
612	>	lock.writeLock().unlock();
613	>	}});
614	>
615	>	waitForQueuedThread(lock, t1);
616	>
617	>	Thread t2 = newStartedThread(new CheckedRunnable() {
618	>	public void realRun() {
619	>	lock.readLock().lock();
620	>	lock.readLock().unlock();
621	>	}});
622	>
623	>	if (fair)
624	>	waitForQueuedThread(lock, t2);
625	>
626	>	Thread t3 = newStartedThread(new CheckedRunnable() {
627	>	public void realRun() {
628	>	lock.readLock().tryLock();
629	>	lock.readLock().unlock();
630	>	}});
631	>
632	>	assertTrue(lock.getReadLockCount() > 0);
633	>	awaitTermination(t3);
634	>	assertTrue(t1.isAlive());
635	>	if (fair) assertTrue(t2.isAlive());
636	>	lock.readLock().unlock();
637	>	awaitTermination(t1);
638	>	awaitTermination(t2);
639	>	}
640	>
641	>	/**
642	>	* Read lock succeeds if write locked by current thread even if
643	>	* other threads are waiting for readlock
644	>	*/
645	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
646	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
647	>	public void testReadHoldingWriteLock2(boolean fair) {
648	>	final PublicReentrantReadWriteLock lock =
649	>	new PublicReentrantReadWriteLock(fair);
650	>	lock.writeLock().lock();
651	>	lock.readLock().lock();
652	>	lock.readLock().unlock();
653	>
654	>	Thread t1 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.readLock().lock();
657	>	lock.readLock().unlock();
658	>	}});
659	>	Thread t2 = newStartedThread(new CheckedRunnable() {
660	>	public void realRun() {
661	>	lock.readLock().lock();
662	>	lock.readLock().unlock();
663	>	}});
664	>
665	>	waitForQueuedThread(lock, t1);
666	>	waitForQueuedThread(lock, t2);
667	>	assertWriteLockedByMoi(lock);
668	>	lock.readLock().lock();
669	>	lock.readLock().unlock();
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673	>	}
674	>
675	>	/**
676	>	* Read lock succeeds if write locked by current thread even if
677	>	* other threads are waiting for writelock
678	>	*/
679	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
680	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
681	>	public void testReadHoldingWriteLock3(boolean fair) {
682	>	final PublicReentrantReadWriteLock lock =
683	>	new PublicReentrantReadWriteLock(fair);
684	>	lock.writeLock().lock();
685	>	lock.readLock().lock();
686	>	lock.readLock().unlock();
687	>
688	>	Thread t1 = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() {
690	>	lock.writeLock().lock();
691	>	lock.writeLock().unlock();
692	>	}});
693	>	Thread t2 = newStartedThread(new CheckedRunnable() {
694	>	public void realRun() {
695	>	lock.writeLock().lock();
696	>	lock.writeLock().unlock();
697	>	}});
698	>
699	>	waitForQueuedThread(lock, t1);
700	>	waitForQueuedThread(lock, t2);
701	>	assertWriteLockedByMoi(lock);
702	>	lock.readLock().lock();
703	>	lock.readLock().unlock();
704	>	assertWriteLockedByMoi(lock);
705	>	lock.writeLock().unlock();
706	>	awaitTermination(t1);
707	>	awaitTermination(t2);
708	>	}
709	>
710	>	/**
711	>	* Write lock succeeds if write locked by current thread even if
712	>	* other threads are waiting for writelock
713	>	*/
714	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
715	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
716	>	public void testWriteHoldingWriteLock4(boolean fair) {
717	>	final PublicReentrantReadWriteLock lock =
718	>	new PublicReentrantReadWriteLock(fair);
719	>	lock.writeLock().lock();
720	>	lock.writeLock().lock();
721	>	lock.writeLock().unlock();
722	>
723	>	Thread t1 = newStartedThread(new CheckedRunnable() {
724	>	public void realRun() {
725	>	lock.writeLock().lock();
726	>	lock.writeLock().unlock();
727	>	}});
728	>	Thread t2 = newStartedThread(new CheckedRunnable() {
729	>	public void realRun() {
730	>	lock.writeLock().lock();
731	>	lock.writeLock().unlock();
732	>	}});
733	>
734	>	waitForQueuedThread(lock, t1);
735	>	waitForQueuedThread(lock, t2);
736	>	assertWriteLockedByMoi(lock);
737	>	assertEquals(1, lock.getWriteHoldCount());
738	>	lock.writeLock().lock();
739	>	assertWriteLockedByMoi(lock);
740	>	assertEquals(2, lock.getWriteHoldCount());
741	>	lock.writeLock().unlock();
742	>	assertWriteLockedByMoi(lock);
743	>	assertEquals(1, lock.getWriteHoldCount());
744	>	lock.writeLock().unlock();
745	>	awaitTermination(t1);
746	>	awaitTermination(t2);
747	>	}
748	>
749	>	/**
750	>	* Read tryLock succeeds if readlocked but not writelocked
751	>	*/
752	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
753	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
754	>	public void testTryLockWhenReadLocked(boolean fair) {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
756	>	lock.readLock().lock();
757	>	Thread t = newStartedThread(new CheckedRunnable() {
758	>	public void realRun() {
759	>	assertTrue(lock.readLock().tryLock());
760	>	lock.readLock().unlock();
761	>	}});
762	>
763	>	awaitTermination(t);
764	>	lock.readLock().unlock();
765	>	}
766	>
767	>	/**
768	>	* write tryLock fails when readlocked
769	>	*/
770	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
771	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
772	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
774	>	lock.readLock().lock();
775	>	Thread t = newStartedThread(new CheckedRunnable() {
776	>	public void realRun() {
777	>	assertFalse(lock.writeLock().tryLock());
778	>	}});
779	>
780	>	awaitTermination(t);
781	>	lock.readLock().unlock();
782	>	}
783	>
784	>	/**
785	>	* write timed tryLock times out if locked
786	>	*/
787	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
788	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
789	>	public void testWriteTryLock_Timeout(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792	>	final long timeoutMillis = timeoutMillis();
793	>	lock.writeLock().lock();
794	>	Thread t = newStartedThread(new CheckedRunnable() {
795	>	public void realRun() throws InterruptedException {
796	>	long startTime = System.nanoTime();
797	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
798	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
799	>	}});
800	>
801	>	awaitTermination(t);
802	>	releaseWriteLock(lock);
803	>	}
804	>
805	>	/**
806	>	* read timed tryLock times out if write-locked
807	>	*/
808	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
809	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
810	>	public void testReadTryLock_Timeout(boolean fair) {
811	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
812	>	lock.writeLock().lock();
813	>	Thread t = newStartedThread(new CheckedRunnable() {
814	>	public void realRun() throws InterruptedException {
815	>	long startTime = System.nanoTime();
816	>	long timeoutMillis = timeoutMillis();
817	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
818	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
819	>	}});
820	>
821	>	awaitTermination(t);
822	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
823	>	lock.writeLock().unlock();
824	>	}
825	>
826	>	/**
827	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
828	>	*/
829	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
830	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
831	>	public void testWriteLockInterruptibly(boolean fair) {
832	>	final PublicReentrantReadWriteLock lock =
833	>	new PublicReentrantReadWriteLock(fair);
834	>	try {
835		lock.writeLock().lockInterruptibly();
836	<	} catch(Exception e) {
837	<	fail("unexpected exception");
838	<	}
839	<	Thread t = new Thread(new Runnable() {
840	<	public void run() {
841	<	try {
842	<	lock.writeLock().lockInterruptibly();
843	<	threadFail("should throw");
844	<	}
845	<	catch(InterruptedException success) {
846	<	}
334	<	}
335	<	});
336	<	try {
337	<	t.start();
338	<	t.interrupt();
339	<	t.join();
340	<	lock.writeLock().unlock();
341	<	} catch(Exception e){
342	<	fail("unexpected exception");
343	<	}
836	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
837	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
838	>	public void realRun() throws InterruptedException {
839	>	lock.writeLock().lockInterruptibly();
840	>	}});
841	>
842	>	waitForQueuedThread(lock, t);
843	>	t.interrupt();
844	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
845	>	awaitTermination(t);
846	>	releaseWriteLock(lock);
847		}
848
849	<	public void testLockInterruptibly2() {
850	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	<	try {
849	>	/**
850	>	* read lockInterruptibly succeeds if lock free else is interruptible
851	>	*/
852	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
853	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
854	>	public void testReadLockInterruptibly(boolean fair) {
855	>	final PublicReentrantReadWriteLock lock =
856	>	new PublicReentrantReadWriteLock(fair);
857	>	try {
858	>	lock.readLock().lockInterruptibly();
859	>	lock.readLock().unlock();
860		lock.writeLock().lockInterruptibly();
861	<	} catch(Exception e) {
862	<	fail("unexpected exception");
863	<	}
864	<	Thread t = new Thread(new Runnable() {
865	<	public void run() {
866	<	try {
867	<	lock.readLock().lockInterruptibly();
868	<	threadFail("should throw");
869	<	}
870	<	catch(InterruptedException success) {
360	<	}
361	<	}
362	<	});
363	<	try {
364	<	t.start();
365	<	t.interrupt();
366	<	t.join();
367	<	lock.writeLock().unlock();
368	<	} catch(Exception e){
369	<	fail("unexpected exception");
370	<	}
861	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
862	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
863	>	public void realRun() throws InterruptedException {
864	>	lock.readLock().lockInterruptibly();
865	>	}});
866	>
867	>	waitForQueuedThread(lock, t);
868	>	t.interrupt();
869	>	awaitTermination(t);
870	>	releaseWriteLock(lock);
871		}
872
873	<	public void testAwait_IllegalMonitor() {
874	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
873	>	/**
874	>	* Calling await without holding lock throws IllegalMonitorStateException
875	>	*/
876	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
877	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
878	>	public void testAwait_IMSE(boolean fair) {
879	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
880		final Condition c = lock.writeLock().newCondition();
881	<	try {
882	<	c.await();
883	<	fail("should throw");
884	<	}
885	<	catch (IllegalMonitorStateException success) {
886	<	}
887	<	catch (Exception ex) {
888	<	fail("should throw IMSE");
881	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
882	>	long startTime = System.nanoTime();
883	>	try {
884	>	await(c, awaitMethod);
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {
887	>	} catch (InterruptedException fail) {
888	>	threadUnexpectedException(fail);
889	>	}
890	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
891		}
892		}
893
894	<	public void testSignal_IllegalMonitor() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	/**
895	>	* Calling signal without holding lock throws IllegalMonitorStateException
896	>	*/
897	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
898	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
899	>	public void testSignal_IMSE(boolean fair) {
900	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
901		final Condition c = lock.writeLock().newCondition();
902		try {
903		c.signal();
904	<	fail("should throw");
905	<	}
394	<	catch (IllegalMonitorStateException success) {
395	<	}
396	<	catch (Exception ex) {
397	<	fail("should throw IMSE");
398	<	}
904	>	shouldThrow();
905	>	} catch (IllegalMonitorStateException success) {}
906		}
907
908	<	public void testAwaitNanos_Timeout() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	/**
909	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
910	>	*/
911	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
912	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
913	>	public void testSignalAll_IMSE(boolean fair) {
914	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
915		final Condition c = lock.writeLock().newCondition();
916		try {
917	<	lock.writeLock().lock();
918	<	long t = c.awaitNanos(100);
919	<	assertTrue(t <= 0);
920	<	lock.writeLock().unlock();
921	<	}
922	<	catch (Exception ex) {
923	<	fail("unexpected exception");
924	<	}
917	>	c.signalAll();
918	>	shouldThrow();
919	>	} catch (IllegalMonitorStateException success) {}
920	>	}
921	>
922	>	/**
923	>	* awaitNanos without a signal times out
924	>	*/
925	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
926	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
927	>	public void testAwaitNanos_Timeout(boolean fair) {
928	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
929	>	final Condition c = lock.writeLock().newCondition();
930	>	final long timeoutMillis = timeoutMillis();
931	>	lock.writeLock().lock();
932	>	final long startTime = System.nanoTime();
933	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
934	>	try {
935	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	>	assertTrue(nanosRemaining <= 0);
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
939	>	lock.writeLock().unlock();
940	>	}
941	>
942	>	/**
943	>	* timed await without a signal times out
944	>	*/
945	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
946	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
947	>	public void testAwait_Timeout(boolean fair) {
948	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
949	>	final Condition c = lock.writeLock().newCondition();
950	>	final long timeoutMillis = timeoutMillis();
951	>	lock.writeLock().lock();
952	>	final long startTime = System.nanoTime();
953	>	try {
954	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
955	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
956	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957	>	lock.writeLock().unlock();
958		}
959
960	<	public void testAwait_Timeout() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	/**
961	>	* awaitUntil without a signal times out
962	>	*/
963	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
964	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
965	>	public void testAwaitUntil_Timeout(boolean fair) {
966	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
967		final Condition c = lock.writeLock().newCondition();
968	+	lock.writeLock().lock();
969	+	// We shouldn't assume that nanoTime and currentTimeMillis
970	+	// use the same time source, so don't use nanoTime here.
971	+	final java.util.Date delayedDate = delayedDate(timeoutMillis());
972	+	try {
973	+	assertFalse(c.awaitUntil(delayedDate));
974	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
975	+	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
976	+	lock.writeLock().unlock();
977	+	}
978	+
979	+	/**
980	+	* await returns when signalled
981	+	*/
982	+	public void testAwait()      { 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	+	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	+	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	+	awaitTermination(t);
1005	+	}
1006	+
1007	+	/**
1008	+	* awaitUninterruptibly is uninterruptible
1009	+	*/
1010	+	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	+	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	+	public void testAwaitUninterruptibly(boolean fair) {
1013	+	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1014	+	final Condition condition = lock.newCondition();
1015	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016	+
1017	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	+	public void realRun() {
1019	+	// Interrupt before awaitUninterruptibly
1020	+	lock.lock();
1021	+	pleaseInterrupt.countDown();
1022	+	Thread.currentThread().interrupt();
1023	+	condition.awaitUninterruptibly();
1024	+	assertTrue(Thread.interrupted());
1025	+	lock.unlock();
1026	+	}});
1027	+
1028	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	+	public void realRun() {
1030	+	// Interrupt during awaitUninterruptibly
1031	+	lock.lock();
1032	+	pleaseInterrupt.countDown();
1033	+	condition.awaitUninterruptibly();
1034	+	assertTrue(Thread.interrupted());
1035	+	lock.unlock();
1036	+	}});
1037	+
1038	+	await(pleaseInterrupt);
1039	+	t2.interrupt();
1040	+	lock.lock();
1041	+	lock.unlock();
1042	+	assertThreadBlocks(t1, Thread.State.WAITING);
1043	+	assertThreadBlocks(t2, Thread.State.WAITING);
1044	+
1045	+	lock.lock();
1046	+	condition.signalAll();
1047	+	lock.unlock();
1048	+
1049	+	awaitTermination(t1);
1050	+	awaitTermination(t2);
1051	+	}
1052	+
1053	+	/**
1054	+	* await/awaitNanos/awaitUntil is interruptible
1055	+	*/
1056	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1057	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1058	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1059	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1060	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1061	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1062	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1063	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1064	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1065	+	final PublicReentrantReadWriteLock lock =
1066	+	new PublicReentrantReadWriteLock(fair);
1067	+	final Condition c = lock.writeLock().newCondition();
1068	+	final CountDownLatch locked = new CountDownLatch(1);
1069	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1070	+	public void realRun() throws InterruptedException {
1071	+	lock.writeLock().lock();
1072	+	assertWriteLockedByMoi(lock);
1073	+	assertHasNoWaiters(lock, c);
1074	+	locked.countDown();
1075	+	try {
1076	+	await(c, awaitMethod);
1077	+	} finally {
1078	+	assertWriteLockedByMoi(lock);
1079	+	assertHasNoWaiters(lock, c);
1080	+	lock.writeLock().unlock();
1081	+	assertFalse(Thread.interrupted());
1082	+	}
1083	+	}});
1084	+
1085	+	await(locked);
1086	+	assertHasWaiters(lock, c, t);
1087	+	t.interrupt();
1088	+	awaitTermination(t);
1089	+	assertNotWriteLocked(lock);
1090	+	}
1091	+
1092	+	/**
1093	+	* signalAll wakes up all threads
1094	+	*/
1095	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1096	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1097	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1098	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1099	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1100	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1101	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1102	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1103	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1104	+	final PublicReentrantReadWriteLock lock =
1105	+	new PublicReentrantReadWriteLock(fair);
1106	+	final Condition c = lock.writeLock().newCondition();
1107	+	final CountDownLatch locked = new CountDownLatch(2);
1108	+	final Lock writeLock = lock.writeLock();
1109	+	class Awaiter extends CheckedRunnable {
1110	+	public void realRun() throws InterruptedException {
1111	+	writeLock.lock();
1112	+	locked.countDown();
1113	+	await(c, awaitMethod);
1114	+	writeLock.unlock();
1115	+	}
1116	+	}
1117	+
1118	+	Thread t1 = newStartedThread(new Awaiter());
1119	+	Thread t2 = newStartedThread(new Awaiter());
1120	+
1121	+	await(locked);
1122	+	writeLock.lock();
1123	+	assertHasWaiters(lock, c, t1, t2);
1124	+	c.signalAll();
1125	+	assertHasNoWaiters(lock, c);
1126	+	writeLock.unlock();
1127	+	awaitTermination(t1);
1128	+	awaitTermination(t2);
1129	+	}
1130	+
1131	+	/**
1132	+	* signal wakes up waiting threads in FIFO order
1133	+	*/
1134	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1135	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1136	+	public void testSignalWakesFifo(boolean fair) {
1137	+	final PublicReentrantReadWriteLock lock =
1138	+	new PublicReentrantReadWriteLock(fair);
1139	+	final Condition c = lock.writeLock().newCondition();
1140	+	final CountDownLatch locked1 = new CountDownLatch(1);
1141	+	final CountDownLatch locked2 = new CountDownLatch(1);
1142	+	final Lock writeLock = lock.writeLock();
1143	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1144	+	public void realRun() throws InterruptedException {
1145	+	writeLock.lock();
1146	+	locked1.countDown();
1147	+	c.await();
1148	+	writeLock.unlock();
1149	+	}});
1150	+
1151	+	await(locked1);
1152	+
1153	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1154	+	public void realRun() throws InterruptedException {
1155	+	writeLock.lock();
1156	+	locked2.countDown();
1157	+	c.await();
1158	+	writeLock.unlock();
1159	+	}});
1160	+
1161	+	await(locked2);
1162	+
1163	+	writeLock.lock();
1164	+	assertHasWaiters(lock, c, t1, t2);
1165	+	assertFalse(lock.hasQueuedThreads());
1166	+	c.signal();
1167	+	assertHasWaiters(lock, c, t2);
1168	+	assertTrue(lock.hasQueuedThread(t1));
1169	+	assertFalse(lock.hasQueuedThread(t2));
1170	+	c.signal();
1171	+	assertHasNoWaiters(lock, c);
1172	+	assertTrue(lock.hasQueuedThread(t1));
1173	+	assertTrue(lock.hasQueuedThread(t2));
1174	+	writeLock.unlock();
1175	+	awaitTermination(t1);
1176	+	awaitTermination(t2);
1177	+	}
1178	+
1179	+	/**
1180	+	* await after multiple reentrant locking preserves lock count
1181	+	*/
1182	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1183	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1184	+	public void testAwaitLockCount(boolean fair) {
1185	+	final PublicReentrantReadWriteLock lock =
1186	+	new PublicReentrantReadWriteLock(fair);
1187	+	final Condition c = lock.writeLock().newCondition();
1188	+	final CountDownLatch locked = new CountDownLatch(2);
1189	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1190	+	public void realRun() throws InterruptedException {
1191	+	lock.writeLock().lock();
1192	+	assertWriteLockedByMoi(lock);
1193	+	assertEquals(1, lock.writeLock().getHoldCount());
1194	+	locked.countDown();
1195	+	c.await();
1196	+	assertWriteLockedByMoi(lock);
1197	+	assertEquals(1, lock.writeLock().getHoldCount());
1198	+	lock.writeLock().unlock();
1199	+	}});
1200	+
1201	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1202	+	public void realRun() throws InterruptedException {
1203	+	lock.writeLock().lock();
1204	+	lock.writeLock().lock();
1205	+	assertWriteLockedByMoi(lock);
1206	+	assertEquals(2, lock.writeLock().getHoldCount());
1207	+	locked.countDown();
1208	+	c.await();
1209	+	assertWriteLockedByMoi(lock);
1210	+	assertEquals(2, lock.writeLock().getHoldCount());
1211	+	lock.writeLock().unlock();
1212	+	lock.writeLock().unlock();
1213	+	}});
1214	+
1215	+	await(locked);
1216	+	lock.writeLock().lock();
1217	+	assertHasWaiters(lock, c, t1, t2);
1218	+	c.signalAll();
1219	+	assertHasNoWaiters(lock, c);
1220	+	lock.writeLock().unlock();
1221	+	awaitTermination(t1);
1222	+	awaitTermination(t2);
1223	+	}
1224	+
1225	+	/**
1226	+	* A serialized lock deserializes as unlocked
1227	+	*/
1228	+	public void testSerialization()      { testSerialization(false); }
1229	+	public void testSerialization_fair() { testSerialization(true); }
1230	+	public void testSerialization(boolean fair) {
1231	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1232	+	lock.writeLock().lock();
1233	+	lock.readLock().lock();
1234	+
1235	+	ReentrantReadWriteLock clone = serialClone(lock);
1236	+	assertEquals(lock.isFair(), clone.isFair());
1237	+	assertTrue(lock.isWriteLocked());
1238	+	assertFalse(clone.isWriteLocked());
1239	+	assertEquals(1, lock.getReadLockCount());
1240	+	assertEquals(0, clone.getReadLockCount());
1241	+	clone.writeLock().lock();
1242	+	clone.readLock().lock();
1243	+	assertTrue(clone.isWriteLocked());
1244	+	assertEquals(1, clone.getReadLockCount());
1245	+	clone.readLock().unlock();
1246	+	clone.writeLock().unlock();
1247	+	assertFalse(clone.isWriteLocked());
1248	+	assertEquals(1, lock.getReadLockCount());
1249	+	assertEquals(0, clone.getReadLockCount());
1250	+	}
1251	+
1252	+	/**
1253	+	* hasQueuedThreads reports whether there are waiting threads
1254	+	*/
1255	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1256	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1257	+	public void testHasQueuedThreads(boolean fair) {
1258	+	final PublicReentrantReadWriteLock lock =
1259	+	new PublicReentrantReadWriteLock(fair);
1260	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262	+	assertFalse(lock.hasQueuedThreads());
1263	+	lock.writeLock().lock();
1264	+	assertFalse(lock.hasQueuedThreads());
1265	+	t1.start();
1266	+	waitForQueuedThread(lock, t1);
1267	+	assertTrue(lock.hasQueuedThreads());
1268	+	t2.start();
1269	+	waitForQueuedThread(lock, t2);
1270	+	assertTrue(lock.hasQueuedThreads());
1271	+	t1.interrupt();
1272	+	awaitTermination(t1);
1273	+	assertTrue(lock.hasQueuedThreads());
1274	+	lock.writeLock().unlock();
1275	+	awaitTermination(t2);
1276	+	assertFalse(lock.hasQueuedThreads());
1277	+	}
1278	+
1279	+	/**
1280	+	* hasQueuedThread(null) throws NPE
1281	+	*/
1282	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1283	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1284	+	public void testHasQueuedThreadNPE(boolean fair) {
1285	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1286	+	try {
1287	+	lock.hasQueuedThread(null);
1288	+	shouldThrow();
1289	+	} catch (NullPointerException success) {}
1290	+	}
1291	+
1292	+	/**
1293	+	* hasQueuedThread reports whether a thread is queued
1294	+	*/
1295	+	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1296	+	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1297	+	public void testHasQueuedThread(boolean fair) {
1298	+	final PublicReentrantReadWriteLock lock =
1299	+	new PublicReentrantReadWriteLock(fair);
1300	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1301	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1302	+	assertFalse(lock.hasQueuedThread(t1));
1303	+	assertFalse(lock.hasQueuedThread(t2));
1304	+	lock.writeLock().lock();
1305	+	t1.start();
1306	+	waitForQueuedThread(lock, t1);
1307	+	assertTrue(lock.hasQueuedThread(t1));
1308	+	assertFalse(lock.hasQueuedThread(t2));
1309	+	t2.start();
1310	+	waitForQueuedThread(lock, t2);
1311	+	assertTrue(lock.hasQueuedThread(t1));
1312	+	assertTrue(lock.hasQueuedThread(t2));
1313	+	t1.interrupt();
1314	+	awaitTermination(t1);
1315	+	assertFalse(lock.hasQueuedThread(t1));
1316	+	assertTrue(lock.hasQueuedThread(t2));
1317	+	lock.writeLock().unlock();
1318	+	awaitTermination(t2);
1319	+	assertFalse(lock.hasQueuedThread(t1));
1320	+	assertFalse(lock.hasQueuedThread(t2));
1321	+	}
1322	+
1323	+	/**
1324	+	* getQueueLength reports number of waiting threads
1325	+	*/
1326	+	public void testGetQueueLength()      { testGetQueueLength(false); }
1327	+	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1328	+	public void testGetQueueLength(boolean fair) {
1329	+	final PublicReentrantReadWriteLock lock =
1330	+	new PublicReentrantReadWriteLock(fair);
1331	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1332	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1333	+	assertEquals(0, lock.getQueueLength());
1334	+	lock.writeLock().lock();
1335	+	t1.start();
1336	+	waitForQueuedThread(lock, t1);
1337	+	assertEquals(1, lock.getQueueLength());
1338	+	t2.start();
1339	+	waitForQueuedThread(lock, t2);
1340	+	assertEquals(2, lock.getQueueLength());
1341	+	t1.interrupt();
1342	+	awaitTermination(t1);
1343	+	assertEquals(1, lock.getQueueLength());
1344	+	lock.writeLock().unlock();
1345	+	awaitTermination(t2);
1346	+	assertEquals(0, lock.getQueueLength());
1347	+	}
1348	+
1349	+	/**
1350	+	* getQueuedThreads includes waiting threads
1351	+	*/
1352	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1353	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1354	+	public void testGetQueuedThreads(boolean fair) {
1355	+	final PublicReentrantReadWriteLock lock =
1356	+	new PublicReentrantReadWriteLock(fair);
1357	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1358	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1359	+	assertTrue(lock.getQueuedThreads().isEmpty());
1360	+	lock.writeLock().lock();
1361	+	assertTrue(lock.getQueuedThreads().isEmpty());
1362	+	t1.start();
1363	+	waitForQueuedThread(lock, t1);
1364	+	assertEquals(1, lock.getQueuedThreads().size());
1365	+	assertTrue(lock.getQueuedThreads().contains(t1));
1366	+	t2.start();
1367	+	waitForQueuedThread(lock, t2);
1368	+	assertEquals(2, lock.getQueuedThreads().size());
1369	+	assertTrue(lock.getQueuedThreads().contains(t1));
1370	+	assertTrue(lock.getQueuedThreads().contains(t2));
1371	+	t1.interrupt();
1372	+	awaitTermination(t1);
1373	+	assertFalse(lock.getQueuedThreads().contains(t1));
1374	+	assertTrue(lock.getQueuedThreads().contains(t2));
1375	+	assertEquals(1, lock.getQueuedThreads().size());
1376	+	lock.writeLock().unlock();
1377	+	awaitTermination(t2);
1378	+	assertTrue(lock.getQueuedThreads().isEmpty());
1379	+	}
1380	+
1381	+	/**
1382	+	* hasWaiters throws NPE if null
1383	+	*/
1384	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1385	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1386	+	public void testHasWaitersNPE(boolean fair) {
1387	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1388	+	try {
1389	+	lock.hasWaiters(null);
1390	+	shouldThrow();
1391	+	} catch (NullPointerException success) {}
1392	+	}
1393	+
1394	+	/**
1395	+	* getWaitQueueLength throws NPE if null
1396	+	*/
1397	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1398	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1399	+	public void testGetWaitQueueLengthNPE(boolean fair) {
1400	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1401	+	try {
1402	+	lock.getWaitQueueLength(null);
1403	+	shouldThrow();
1404	+	} catch (NullPointerException success) {}
1405	+	}
1406	+
1407	+	/**
1408	+	* getWaitingThreads throws NPE if null
1409	+	*/
1410	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1411	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1412	+	public void testGetWaitingThreadsNPE(boolean fair) {
1413	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1414	+	try {
1415	+	lock.getWaitingThreads(null);
1416	+	shouldThrow();
1417	+	} catch (NullPointerException success) {}
1418	+	}
1419	+
1420	+	/**
1421	+	* hasWaiters throws IllegalArgumentException if not owned
1422	+	*/
1423	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1424	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1425	+	public void testHasWaitersIAE(boolean fair) {
1426	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1427	+	final Condition c = lock.writeLock().newCondition();
1428	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1429		try {
1430	<	lock.writeLock().lock();
1431	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
1432	<	lock.writeLock().unlock();
422	<	}
423	<	catch (Exception ex) {
424	<	fail("unexpected exception");
425	<	}
1430	>	lock2.hasWaiters(c);
1431	>	shouldThrow();
1432	>	} catch (IllegalArgumentException success) {}
1433		}
1434
1435	<	public void testAwaitUntil_Timeout() {
1436	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1435	>	/**
1436	>	* hasWaiters throws IllegalMonitorStateException if not locked
1437	>	*/
1438	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1439	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1440	>	public void testHasWaitersIMSE(boolean fair) {
1441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1442		final Condition c = lock.writeLock().newCondition();
1443		try {
1444	<	lock.writeLock().lock();
1445	<	java.util.Date d = new java.util.Date();
1446	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
435	<	lock.writeLock().unlock();
436	<	}
437	<	catch (Exception ex) {
438	<	fail("unexpected exception");
439	<	}
1444	>	lock.hasWaiters(c);
1445	>	shouldThrow();
1446	>	} catch (IllegalMonitorStateException success) {}
1447		}
1448
1449	<	public void testAwait() {
1450	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1449	>	/**
1450	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1451	>	*/
1452	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1453	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1454	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1455	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1456		final Condition c = lock.writeLock().newCondition();
1457	<	Thread t = new Thread(new Runnable() {
1458	<	public void run() {
1459	<	try {
1460	<	lock.writeLock().lock();
1461	<	c.await();
1462	<	lock.writeLock().unlock();
451	<	}
452	<	catch(InterruptedException e) {
453	<	threadFail("unexpected exception");
454	<	}
455	<	}
456	<	});
1457	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1458	>	try {
1459	>	lock2.getWaitQueueLength(c);
1460	>	shouldThrow();
1461	>	} catch (IllegalArgumentException success) {}
1462	>	}
1463
1464	+	/**
1465	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1466	+	*/
1467	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1468	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1469	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
1470	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1471	+	final Condition c = lock.writeLock().newCondition();
1472		try {
1473	<	t.start();
1474	<	Thread.sleep(SHORT_DELAY_MS);
1475	<	lock.writeLock().lock();
462	<	c.signal();
463	<	lock.writeLock().unlock();
464	<	t.join(SHORT_DELAY_MS);
465	<	assertFalse(t.isAlive());
466	<	}
467	<	catch (Exception ex) {
468	<	fail("unexpected exception");
469	<	}
1473	>	lock.getWaitQueueLength(c);
1474	>	shouldThrow();
1475	>	} catch (IllegalMonitorStateException success) {}
1476		}
1477
1478	<	public void testAwaitUninterruptibly() {
1479	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1478	>	/**
1479	>	* getWaitingThreads throws IllegalArgumentException if not owned
1480	>	*/
1481	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1482	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1483	>	public void testGetWaitingThreadsIAE(boolean fair) {
1484	>	final PublicReentrantReadWriteLock lock =
1485	>	new PublicReentrantReadWriteLock(fair);
1486		final Condition c = lock.writeLock().newCondition();
1487	<	Thread t = new Thread(new Runnable() {
1488	<	public void run() {
1489	<	lock.writeLock().lock();
1490	<	c.awaitUninterruptibly();
1491	<	lock.writeLock().unlock();
1492	<	}
1493	<	});
1487	>	final PublicReentrantReadWriteLock lock2 =
1488	>	new PublicReentrantReadWriteLock(fair);
1489	>	try {
1490	>	lock2.getWaitingThreads(c);
1491	>	shouldThrow();
1492	>	} catch (IllegalArgumentException success) {}
1493	>	}
1494
1495	+	/**
1496	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
1497	+	*/
1498	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1499	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1500	+	public void testGetWaitingThreadsIMSE(boolean fair) {
1501	+	final PublicReentrantReadWriteLock lock =
1502	+	new PublicReentrantReadWriteLock(fair);
1503	+	final Condition c = lock.writeLock().newCondition();
1504		try {
1505	<	t.start();
1506	<	Thread.sleep(SHORT_DELAY_MS);
1507	<	t.interrupt();
487	<	lock.writeLock().lock();
488	<	c.signal();
489	<	lock.writeLock().unlock();
490	<	t.join(SHORT_DELAY_MS);
491	<	assertFalse(t.isAlive());
492	<	}
493	<	catch (Exception ex) {
494	<	fail("unexpected exception");
495	<	}
1505	>	lock.getWaitingThreads(c);
1506	>	shouldThrow();
1507	>	} catch (IllegalMonitorStateException success) {}
1508		}
1509
1510	<	public void testAwait_Interrupt() {
1511	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1512	<	final Condition c = lock.writeLock().newCondition();
1513	<	Thread t = new Thread(new Runnable() {
1514	<	public void run() {
1515	<	try {
1516	<	lock.writeLock().lock();
1517	<	c.await();
1518	<	lock.writeLock().unlock();
1519	<	threadFail("should throw");
1520	<	}
1521	<	catch(InterruptedException success) {
1522	<	}
1523	<	}
1524	<	});
1525	<
1526	<	try {
1527	<	t.start();
1528	<	Thread.sleep(SHORT_DELAY_MS);
1529	<	t.interrupt();
1530	<	t.join(SHORT_DELAY_MS);
1531	<	assertFalse(t.isAlive());
1532	<	}
1533	<	catch (Exception ex) {
1534	<	fail("unexpected exception");
1535	<	}
1536	<	}
1537	<
1538	<	public void testAwaitNanos_Interrupt() {
1539	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1540	<	final Condition c = lock.writeLock().newCondition();
1541	<	Thread t = new Thread(new Runnable() {
530	<	public void run() {
531	<	try {
532	<	lock.writeLock().lock();
533	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
534	<	lock.writeLock().unlock();
535	<	threadFail("should throw");
536	<	}
537	<	catch(InterruptedException success) {
538	<	}
539	<	}
540	<	});
541	<
542	<	try {
543	<	t.start();
544	<	Thread.sleep(SHORT_DELAY_MS);
545	<	t.interrupt();
546	<	t.join(SHORT_DELAY_MS);
547	<	assertFalse(t.isAlive());
548	<	}
549	<	catch (Exception ex) {
550	<	fail("unexpected exception");
551	<	}
552	<	}
553	<
554	<	public void testAwaitUntil_Interrupt() {
555	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
556	<	final Condition c = lock.writeLock().newCondition();
557	<	Thread t = new Thread(new Runnable() {
558	<	public void run() {
559	<	try {
560	<	lock.writeLock().lock();
561	<	java.util.Date d = new java.util.Date();
562	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
563	<	lock.writeLock().unlock();
564	<	threadFail("should throw");
565	<	}
566	<	catch(InterruptedException success) {
567	<	}
568	<	}
569	<	});
570	<
571	<	try {
572	<	t.start();
573	<	Thread.sleep(SHORT_DELAY_MS);
574	<	t.interrupt();
575	<	t.join(SHORT_DELAY_MS);
576	<	assertFalse(t.isAlive());
577	<	}
578	<	catch (Exception ex) {
579	<	fail("unexpected exception");
580	<	}
581	<	}
582	<
583	<	public void testSignalAll() {
584	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
585	<	final Condition c = lock.writeLock().newCondition();
586	<	Thread t1 = new Thread(new Runnable() {
587	<	public void run() {
588	<	try {
589	<	lock.writeLock().lock();
590	<	c.await();
591	<	lock.writeLock().unlock();
592	<	}
593	<	catch(InterruptedException e) {
594	<	threadFail("unexpected exception");
595	<	}
596	<	}
597	<	});
598	<
599	<	Thread t2 = new Thread(new Runnable() {
600	<	public void run() {
601	<	try {
602	<	lock.writeLock().lock();
603	<	c.await();
604	<	lock.writeLock().unlock();
605	<	}
606	<	catch(InterruptedException e) {
607	<	threadFail("unexpected exception");
608	<	}
609	<	}
610	<	});
611	<
612	<	try {
613	<	t1.start();
614	<	t2.start();
615	<	Thread.sleep(SHORT_DELAY_MS);
616	<	lock.writeLock().lock();
617	<	c.signalAll();
618	<	lock.writeLock().unlock();
619	<	t1.join(SHORT_DELAY_MS);
620	<	t2.join(SHORT_DELAY_MS);
621	<	assertFalse(t1.isAlive());
622	<	assertFalse(t2.isAlive());
623	<	}
624	<	catch (Exception ex) {
625	<	fail("unexpected exception");
626	<	}
1510	>	/**
1511	>	* hasWaiters returns true when a thread is waiting, else false
1512	>	*/
1513	>	public void testHasWaiters()      { testHasWaiters(false); }
1514	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1515	>	public void testHasWaiters(boolean fair) {
1516	>	final PublicReentrantReadWriteLock lock =
1517	>	new PublicReentrantReadWriteLock(fair);
1518	>	final Condition c = lock.writeLock().newCondition();
1519	>	final CountDownLatch locked = new CountDownLatch(1);
1520	>	Thread t = newStartedThread(new CheckedRunnable() {
1521	>	public void realRun() throws InterruptedException {
1522	>	lock.writeLock().lock();
1523	>	assertHasNoWaiters(lock, c);
1524	>	assertFalse(lock.hasWaiters(c));
1525	>	locked.countDown();
1526	>	c.await();
1527	>	assertHasNoWaiters(lock, c);
1528	>	assertFalse(lock.hasWaiters(c));
1529	>	lock.writeLock().unlock();
1530	>	}});
1531	>
1532	>	await(locked);
1533	>	lock.writeLock().lock();
1534	>	assertHasWaiters(lock, c, t);
1535	>	assertTrue(lock.hasWaiters(c));
1536	>	c.signal();
1537	>	assertHasNoWaiters(lock, c);
1538	>	assertFalse(lock.hasWaiters(c));
1539	>	lock.writeLock().unlock();
1540	>	awaitTermination(t);
1541	>	assertHasNoWaiters(lock, c);
1542		}
1543
1544	<	public void testSerialization() {
1545	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1546	<	l.readLock().lock();
1547	<	l.readLock().unlock();
1548	<
1549	<	try {
1550	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1551	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1552	<	out.writeObject(l);
1553	<	out.close();
1554	<
1555	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1556	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1557	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1558	<	r.readLock().lock();
1559	<	r.readLock().unlock();
1560	<	} catch(Exception e){
1561	<	e.printStackTrace();
1562	<	fail("unexpected exception");
1563	<	}
1544	>	/**
1545	>	* getWaitQueueLength returns number of waiting threads
1546	>	*/
1547	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1548	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1549	>	public void testGetWaitQueueLength(boolean fair) {
1550	>	final PublicReentrantReadWriteLock lock =
1551	>	new PublicReentrantReadWriteLock(fair);
1552	>	final Condition c = lock.writeLock().newCondition();
1553	>	final CountDownLatch locked = new CountDownLatch(1);
1554	>	Thread t = newStartedThread(new CheckedRunnable() {
1555	>	public void realRun() throws InterruptedException {
1556	>	lock.writeLock().lock();
1557	>	assertEquals(0, lock.getWaitQueueLength(c));
1558	>	locked.countDown();
1559	>	c.await();
1560	>	lock.writeLock().unlock();
1561	>	}});
1562	>
1563	>	await(locked);
1564	>	lock.writeLock().lock();
1565	>	assertHasWaiters(lock, c, t);
1566	>	assertEquals(1, lock.getWaitQueueLength(c));
1567	>	c.signal();
1568	>	assertHasNoWaiters(lock, c);
1569	>	assertEquals(0, lock.getWaitQueueLength(c));
1570	>	lock.writeLock().unlock();
1571	>	awaitTermination(t);
1572		}
1573
1574	+	/**
1575	+	* getWaitingThreads returns only and all waiting threads
1576	+	*/
1577	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1578	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1579	+	public void testGetWaitingThreads(boolean fair) {
1580	+	final PublicReentrantReadWriteLock lock =
1581	+	new PublicReentrantReadWriteLock(fair);
1582	+	final Condition c = lock.writeLock().newCondition();
1583	+	final CountDownLatch locked1 = new CountDownLatch(1);
1584	+	final CountDownLatch locked2 = new CountDownLatch(1);
1585	+	Thread t1 = new Thread(new CheckedRunnable() {
1586	+	public void realRun() throws InterruptedException {
1587	+	lock.writeLock().lock();
1588	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1589	+	locked1.countDown();
1590	+	c.await();
1591	+	lock.writeLock().unlock();
1592	+	}});
1593	+
1594	+	Thread t2 = new Thread(new CheckedRunnable() {
1595	+	public void realRun() throws InterruptedException {
1596	+	lock.writeLock().lock();
1597	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1598	+	locked2.countDown();
1599	+	c.await();
1600	+	lock.writeLock().unlock();
1601	+	}});
1602	+
1603	+	lock.writeLock().lock();
1604	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1605	+	lock.writeLock().unlock();
1606	+
1607	+	t1.start();
1608	+	await(locked1);
1609	+	t2.start();
1610	+	await(locked2);
1611	+
1612	+	lock.writeLock().lock();
1613	+	assertTrue(lock.hasWaiters(c));
1614	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1615	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1616	+	assertEquals(2, lock.getWaitingThreads(c).size());
1617	+	c.signalAll();
1618	+	assertHasNoWaiters(lock, c);
1619	+	lock.writeLock().unlock();
1620	+
1621	+	awaitTermination(t1);
1622	+	awaitTermination(t2);
1623	+
1624	+	assertHasNoWaiters(lock, c);
1625	+	}
1626	+
1627	+	/**
1628	+	* toString indicates current lock state
1629	+	*/
1630	+	public void testToString()      { testToString(false); }
1631	+	public void testToString_fair() { testToString(true); }
1632	+	public void testToString(boolean fair) {
1633	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1634	+	assertTrue(lock.toString().contains("Write locks = 0"));
1635	+	assertTrue(lock.toString().contains("Read locks = 0"));
1636	+	lock.writeLock().lock();
1637	+	assertTrue(lock.toString().contains("Write locks = 1"));
1638	+	assertTrue(lock.toString().contains("Read locks = 0"));
1639	+	lock.writeLock().lock();
1640	+	assertTrue(lock.toString().contains("Write locks = 2"));
1641	+	assertTrue(lock.toString().contains("Read locks = 0"));
1642	+	lock.writeLock().unlock();
1643	+	lock.writeLock().unlock();
1644	+	lock.readLock().lock();
1645	+	assertTrue(lock.toString().contains("Write locks = 0"));
1646	+	assertTrue(lock.toString().contains("Read locks = 1"));
1647	+	lock.readLock().lock();
1648	+	assertTrue(lock.toString().contains("Write locks = 0"));
1649	+	assertTrue(lock.toString().contains("Read locks = 2"));
1650	+	}
1651	+
1652	+	/**
1653	+	* readLock.toString indicates current lock state
1654	+	*/
1655	+	public void testReadLockToString()      { testReadLockToString(false); }
1656	+	public void testReadLockToString_fair() { testReadLockToString(true); }
1657	+	public void testReadLockToString(boolean fair) {
1658	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1660	+	lock.readLock().lock();
1661	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1662	+	lock.readLock().lock();
1663	+	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664	+	lock.readLock().unlock();
1665	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1666	+	lock.readLock().unlock();
1667	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1668	+	}
1669	+
1670	+	/**
1671	+	* writeLock.toString indicates current lock state
1672	+	*/
1673	+	public void testWriteLockToString()      { testWriteLockToString(false); }
1674	+	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1675	+	public void testWriteLockToString(boolean fair) {
1676	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1677	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678	+	lock.writeLock().lock();
1679	+	assertTrue(lock.writeLock().toString().contains("Locked by"));
1680	+	lock.writeLock().unlock();
1681	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1682	+	}
1683
1684	+	/**
1685	+	* ThreadMXBean reports the blockers that we expect.
1686	+	*/
1687	+	public void testBlockers() {
1688	+	if (!testImplementationDetails) return;
1689	+	final boolean fair = randomBoolean();
1690	+	final boolean timedAcquire = randomBoolean();
1691	+	final boolean timedAwait = randomBoolean();
1692	+	final String syncClassName = fair
1693	+	? "ReentrantReadWriteLock$FairSync"
1694	+	: "ReentrantReadWriteLock$NonfairSync";
1695	+	final String conditionClassName
1696	+	= "AbstractQueuedSynchronizer$ConditionObject";
1697	+	final Thread.State expectedAcquireState = timedAcquire
1698	+	? Thread.State.TIMED_WAITING
1699	+	: Thread.State.WAITING;
1700	+	final Thread.State expectedAwaitState = timedAwait
1701	+	? Thread.State.TIMED_WAITING
1702	+	: Thread.State.WAITING;
1703	+	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1704	+	final Condition condition = lock.newCondition();
1705	+	final AtomicBoolean conditionSatisfied = new AtomicBoolean(false);
1706	+	lock.lock();
1707	+	final Thread thread = newStartedThread((Action) () -> {
1708	+	if (timedAcquire)
1709	+	lock.tryLock(LONGER_DELAY_MS, MILLISECONDS);
1710	+	else
1711	+	lock.lock();
1712	+	while (!conditionSatisfied.get())
1713	+	if (timedAwait)
1714	+	condition.await(LONGER_DELAY_MS, MILLISECONDS);
1715	+	else
1716	+	condition.await();
1717	+	});
1718	+	Callable<Boolean> waitingForLock = () -> {
1719	+	String className;
1720	+	return thread.getState() == expectedAcquireState
1721	+	&& (className = blockerClassName(thread)) != null
1722	+	&& className.endsWith(syncClassName);
1723	+	};
1724	+	waitForThreadToEnterWaitState(thread, waitingForLock);
1725	+
1726	+	lock.unlock();
1727	+	Callable<Boolean> waitingForCondition = () -> {
1728	+	String className;
1729	+	return thread.getState() == expectedAwaitState
1730	+	&& (className = blockerClassName(thread)) != null
1731	+	&& className.endsWith(conditionClassName);
1732	+	};
1733	+	waitForThreadToEnterWaitState(thread, waitingForCondition);
1734	+
1735	+	// politely release the waiter
1736	+	conditionSatisfied.set(true);
1737	+	lock.lock();
1738	+	try {
1739	+	condition.signal();
1740	+	} finally { lock.unlock(); }
1741	+
1742	+	awaitTermination(thread);
1743	+	}
1744		}

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