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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 1.68 by jsr166, Wed Dec 31 05:04:04 2014 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.*;
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	<	static int HOLD_COUNT_TEST_LIMIT = 20;
27	<
23	<	/*
24	<	* Unlocks an unlocked lock, throws Illegal Monitor State
25	<	*
26	>	/**
27	>	* A runnable calling lockInterruptibly
28		*/
29	<	public void testIllegalMonitorStateException(){
30	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
31	<	try{
32	<	rl.writeLock().unlock();
33	<	fail("Should of thown Illegal Monitor State Exception");
29	>	class InterruptibleLockRunnable extends CheckedRunnable {
30	>	final ReentrantReadWriteLock lock;
31	>	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
32	>	public void realRun() throws InterruptedException {
33	>	lock.writeLock().lockInterruptibly();
34	>	}
35	>	}
36
37	<	}catch(IllegalMonitorStateException success){}
37	>	/**
38	>	* A runnable calling lockInterruptibly that expects to be
39	>	* interrupted
40	>	*/
41	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
42	>	final ReentrantReadWriteLock lock;
43	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
44	>	public void realRun() throws InterruptedException {
45	>	lock.writeLock().lockInterruptibly();
46	>	}
47		}
48
49	+	/**
50	+	* Subclass to expose protected methods
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	+	}
61	+	public Collection<Thread> getWaitingThreads(Condition c) {
62	+	return super.getWaitingThreads(c);
63	+	}
64	+	}
65
66	+	/**
67	+	* Releases write lock, checking that it had a hold count of 1.
68	+	*/
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	<	public void testInterruptedException(){
78	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
79	<	lock.writeLock().lock();
80	<	Thread t = new Thread(new Runnable() {
81	<	public void run(){
82	<	try{
83	<	lock.writeLock().lockInterruptibly();
84	<	threadFail("should throw");
85	<	}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");
77	>	/**
78	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
79	>	*/
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	+	assertNotSame(t, lock.getOwner());
89		}
90
91	<	public void testInterruptedException3(){
92	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
93	<	lock.writeLock().lock();
94	<	Thread t = new Thread(new Runnable() {
95	<	public void run(){
96	<	try{
97	<	lock.readLock().lockInterruptibly();
98	<	threadFail("should throw");
99	<	}catch(InterruptedException success){}
100	<	}
101	<	});
102	<	try {
103	<	t.start();
104	<	t.interrupt();
105	<	lock.writeLock().unlock();
106	<	t.join();
107	<	} catch(Exception e){
108	<	fail("unexpected exception");
109	<	}
110	<	}
111	<
112	<	public void testInterruptedException4(){
113	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
114	<	lock.writeLock().lock();
115	<	Thread t = new Thread(new Runnable() {
116	<	public void run(){
117	<	try{
118	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
119	<	threadFail("should throw");
120	<	}catch(InterruptedException success){}
121	<	}
122	<	});
123	<	try {
124	<	t.start();
125	<	t.interrupt();
126	<	t.join();
127	<	} catch(Exception e){
128	<	fail("unexpected exception");
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	>	* 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	<	public void testTryLockWhenLocked() {
176	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
177	<	lock.writeLock().lock();
178	<	Thread t = new Thread(new Runnable() {
179	<	public void run(){
180	<	threadAssertFalse(lock.writeLock().tryLock());
181	<	}
182	<	});
183	<	try {
184	<	t.start();
185	<	t.join();
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()      { 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	<	} catch(Exception e){
135	<	fail("unexpected exception");
231	>	assertEquals(i-1,lock.getWriteHoldCount());
232		}
233	<	}
233	>	}
234
235	<	public void testTryLockWhenLocked2() {
236	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
237	<	lock.writeLock().lock();
238	<	Thread t = new Thread(new Runnable() {
239	<	public void run(){
240	<	threadAssertFalse(lock.readLock().tryLock());
241	<	}
242	<	});
243	<	try {
244	<	t.start();
245	<	t.join();
235	>	/**
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	<	} catch(Exception e){
152	<	fail("unexpected exception");
248	>	assertEquals(i-1,lock.writeLock().getHoldCount());
249		}
250	<	}
250	>	}
251
252	<	public void testMultipleReadLocks() {
253	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	lock.readLock().lock();
255	<	Thread t = new Thread(new Runnable() {
256	<	public void run(){
257	<	threadAssertTrue(lock.readLock().tryLock());
258	<	lock.readLock().unlock();
259	<	}
260	<	});
261	<	try {
262	<	t.start();
263	<	t.join();
252	>	/**
253	>	* getReadHoldCount returns number of recursive holds
254	>	*/
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	<	} catch(Exception e){
170	<	fail("unexpected exception");
265	>	assertEquals(i-1,lock.getReadHoldCount());
266		}
267	<	}
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	<	});
267	>	}
268
269	+	/**
270	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
271	+	*/
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 {
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);
277		lock.writeLock().unlock();
278	<	t1.join(MEDIUM_DELAY_MS);
279	<	t2.join(MEDIUM_DELAY_MS);
280	<	assertTrue(!t1.isAlive());
281	<	assertTrue(!t2.isAlive());
282	<
283	<	} catch(Exception e){
284	<	fail("unexpected exception");
285	<	}
286	<	}
287	<
288	<
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	<	});
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 {
247	–	t.start();
248	–	t.join();
290		lock.readLock().unlock();
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
293	<	}
253	<	}
291	>	shouldThrow();
292	>	} catch (IllegalMonitorStateException success) {}
293	>	}
294
295	<
295	>	/**
296	>	* write-lockInterruptibly is interruptible
297	>	*/
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	>	waitForQueuedThread(lock, t);
310	>	t.interrupt();
311	>	awaitTermination(t);
312	>	releaseWriteLock(lock);
313	>	}
314
315	<	public void testWriteTryLockWhenReadLocked() {
316	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	<	lock.readLock().lock();
318	<	Thread t = new Thread(new Runnable() {
319	<	public void run(){
320	<	threadAssertFalse(lock.writeLock().tryLock());
321	<	}
322	<	});
323	<	try {
324	<	t.start();
325	<	t.join();
326	<	lock.readLock().unlock();
327	<	} catch(Exception e){
328	<	fail("unexpected exception");
329	<	}
330	<	}
315	>	/**
316	>	* timed write-tryLock is interruptible
317	>	*/
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	>	waitForQueuedThread(lock, t);
330	>	t.interrupt();
331	>	awaitTermination(t);
332	>	releaseWriteLock(lock);
333	>	}
334
335	<
335	>	/**
336	>	* read-lockInterruptibly is interruptible
337	>	*/
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	>	waitForQueuedThread(lock, t);
350	>	t.interrupt();
351	>	awaitTermination(t);
352	>	releaseWriteLock(lock);
353	>	}
354
355	<	public void testTryLock_Timeout(){
356	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
357	<	lock.writeLock().lock();
358	<	Thread t = new Thread(new Runnable() {
359	<	public void run(){
360	<	try {
361	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
362	<	} catch (Exception ex) {
363	<	threadFail("unexpected exception");
364	<	}
365	<	}
366	<	});
367	<	try {
368	<	t.start();
369	<	t.join();
370	<	lock.writeLock().unlock();
371	<	} catch(Exception e){
372	<	fail("unexpected exception");
373	<	}
295	<	}
355	>	/**
356	>	* timed read-tryLock is interruptible
357	>	*/
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	>	waitForQueuedThread(lock, t);
370	>	t.interrupt();
371	>	awaitTermination(t);
372	>	releaseWriteLock(lock);
373	>	}
374
375	<	public void testTryLock_Timeout2(){
376	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
377	<	lock.writeLock().lock();
378	<	Thread t = new Thread(new Runnable() {
379	<	public void run(){
380	<	try {
381	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
382	<	} catch (Exception ex) {
383	<	threadFail("unexpected exception");
384	<	}
385	<	}
386	<	});
387	<	try {
388	<	t.start();
389	<	t.join();
390	<	lock.writeLock().unlock();
391	<	} catch(Exception e){
392	<	fail("unexpected exception");
393	<	}
394	<	}
375	>	/**
376	>	* write-tryLock on an unlocked lock succeeds
377	>	*/
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	>	* write-tryLock fails if locked
393	>	*/
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	>	awaitTermination(t);
406	>	releaseWriteLock(lock);
407	>	}
408	>
409	>	/**
410	>	* read-tryLock fails if locked
411	>	*/
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	>	awaitTermination(t);
424	>	releaseWriteLock(lock);
425	>	}
426	>
427	>	/**
428	>	* Multiple threads can hold a read lock when not write-locked
429	>	*/
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	>	awaitTermination(t);
446	>	lock.readLock().unlock();
447	>	}
448	>
449	>	/**
450	>	* A writelock succeeds only after a reading thread unlocks
451	>	*/
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	>	assertEquals(0, lock.getReadLockCount());
470	>	awaitTermination(t);
471	>	assertNotWriteLocked(lock);
472	>	}
473	>
474	>	/**
475	>	* A writelock succeeds only after reading threads unlock
476	>	*/
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();
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.readLock().unlock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	awaitTermination(t2);
506	>	assertNotWriteLocked(lock);
507	>	}
508	>
509	>	/**
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 testReaderWriterReaderFairFifo() {
514	>	final PublicReentrantReadWriteLock lock =
515	>	new PublicReentrantReadWriteLock(true);
516	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
517	>
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	>	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	>	* Read trylock succeeds if write locked by current thread
576	>	*/
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();
585	>	}
586
587	+	/**
588	+	* Read trylock succeeds (barging) even in the presence of waiting
589	+	* readers and/or writers
590	+	*/
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	+	awaitTermination(t1);
627	+	awaitTermination(t2);
628	+	}
629	+
630	+	/**
631	+	* Read lock succeeds if write locked by current thread even if
632	+	* other threads are waiting for readlock
633	+	*/
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	+
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	+	releaseWriteLock(lock);
660	+	awaitTermination(t1);
661	+	awaitTermination(t2);
662	+	}
663	+
664	+	/**
665	+	* Read lock succeeds if write locked by current thread even if
666	+	* other threads are waiting for writelock
667	+	*/
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	+
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	+	awaitTermination(t1);
696	+	awaitTermination(t2);
697	+	}
698	+
699	+	/**
700	+	* Write lock succeeds if write locked by current thread even if
701	+	* other threads are waiting for writelock
702	+	*/
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();
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	+	awaitTermination(t1);
735	+	awaitTermination(t2);
736	+	}
737	+
738	+	/**
739	+	* Read tryLock succeeds if readlocked but not writelocked
740	+	*/
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	+	awaitTermination(t);
753	+	lock.readLock().unlock();
754	+	}
755	+
756	+	/**
757	+	* write tryLock fails when readlocked
758	+	*/
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	+	awaitTermination(t);
770	+	lock.readLock().unlock();
771	+	}
772	+
773	+	/**
774	+	* write timed tryLock times out if locked
775	+	*/
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	+	awaitTermination(t);
791	+	releaseWriteLock(lock);
792	+	}
793	+
794	+	/**
795	+	* read timed tryLock times out if write-locked
796	+	*/
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	+	awaitTermination(t);
811	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
812	+	lock.writeLock().unlock();
813	+	}
814
815	<	public void testLockInterruptibly() {
816	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
817	<	try {
815	>	/**
816	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
817	>	*/
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(Exception e) {
826	<	fail("unexpected exception");
325	<	}
326	<	Thread t = new Thread(new Runnable() {
327	<	public void run() {
328	<	try {
329	<	lock.writeLock().lockInterruptibly();
330	<	threadFail("should throw");
331	<	}
332	<	catch(InterruptedException success) {
333	<	}
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");
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	+	waitForQueuedThread(lock, t);
834	+	t.interrupt();
835	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
836	+	awaitTermination(t);
837	+	releaseWriteLock(lock);
838		}
839
840	<	public void testLockInterruptibly2() {
841	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
842	<	try {
840	>	/**
841	>	* read lockInterruptibly succeeds if lock free else is interruptible
842	>	*/
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(Exception e) {
853	<	fail("unexpected exception");
352	<	}
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	try {
356	<	lock.readLock().lockInterruptibly();
357	<	threadFail("should throw");
358	<	}
359	<	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");
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	+	waitForQueuedThread(lock, t);
861	+	t.interrupt();
862	+	awaitTermination(t);
863	+	releaseWriteLock(lock);
864		}
865
866	<	public void testAwait_IllegalMonitor() {
867	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
866	>	/**
867	>	* Calling await without holding lock throws IllegalMonitorStateException
868	>	*/
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	<	try {
875	<	c.await();
876	<	fail("should throw");
877	<	}
878	<	catch (IllegalMonitorStateException success) {
879	<	}
880	<	catch (Exception ex) {
881	<	fail("should throw IMSE");
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	<	public void testSignal_IllegalMonitor() {
886	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
885	>	/**
886	>	* Calling signal without holding lock throws IllegalMonitorStateException
887	>	*/
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.signal();
895	<	fail("should throw");
896	<	}
394	<	catch (IllegalMonitorStateException success) {
395	<	}
396	<	catch (Exception ex) {
397	<	fail("should throw IMSE");
398	<	}
895	>	shouldThrow();
896	>	} catch (IllegalMonitorStateException success) {}
897		}
898
899	<	public void testAwaitNanos_Timeout() {
900	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
899	>	/**
900	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
901	>	*/
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.signalAll();
909	+	shouldThrow();
910	+	} catch (IllegalMonitorStateException success) {}
911	+	}
912	+
913	+	/**
914	+	* awaitNanos without a signal times out
915	+	*/
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 t = c.awaitNanos(100);
925	<	assertTrue(t <= 0);
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	<	}
932	<	catch (Exception ex) {
411	<	fail("unexpected exception");
931	>	} catch (InterruptedException e) {
932	>	threadUnexpectedException(e);
933		}
934		}
935
936	<	public void testAwait_Timeout() {
937	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
938	<	final Condition c = lock.writeLock().newCondition();
939	<	try {
936	>	/**
937	>	* timed await without a signal times out
938	>	*/
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	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
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	<	}
953	<	catch (Exception ex) {
424	<	fail("unexpected exception");
952	>	} catch (InterruptedException e) {
953	>	threadUnexpectedException(e);
954		}
955		}
956
957	<	public void testAwaitUntil_Timeout() {
958	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
959	<	final Condition c = lock.writeLock().newCondition();
960	<	try {
957	>	/**
958	>	* awaitUntil without a signal times out
959	>	*/
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() + 10)));
971	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
972	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
973		lock.writeLock().unlock();
974	<	}
975	<	catch (Exception ex) {
438	<	fail("unexpected exception");
974	>	} catch (InterruptedException e) {
975	>	threadUnexpectedException(e);
976		}
977		}
978
979	<	public void testAwait() {
980	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	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) {
996	<	threadFail("unexpected exception");
997	<	}
998	<	}
999	<	});
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	<	try {
1008	<	t.start();
1009	<	Thread.sleep(SHORT_DELAY_MS);
1010	<	lock.writeLock().lock();
1011	<	c.signal();
1012	<	lock.writeLock().unlock();
1013	<	t.join(SHORT_DELAY_MS);
1014	<	assertFalse(t.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	fail("unexpected exception");
1018	<	}
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 ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1014	>	final Condition c = lock.writeLock().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.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	>	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	>	c.signalAll();
1048	>	lock.writeLock().unlock();
1049	>
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054	<	public void testAwaitUninterruptibly() {
1055	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1054	>	/**
1055	>	* await/awaitNanos/awaitUntil is interruptible
1056	>	*/
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	<	lock.writeLock().lock();
1072	<	c.awaitUninterruptibly();
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	<	}
1083	<	});
1082	>	assertFalse(Thread.interrupted());
1083	>	}
1084	>	}});
1085	>
1086	>	await(locked);
1087	>	assertHasWaiters(lock, c, t);
1088	>	t.interrupt();
1089	>	awaitTermination(t);
1090	>	assertNotWriteLocked(lock);
1091	>	}
1092	>
1093	>	/**
1094	>	* signalAll wakes up all threads
1095	>	*/
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	>	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	>	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	>	* signal wakes up waiting threads in FIFO order
1134	>	*/
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	>	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	>	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	>	* 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	>	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	>	await(locked);
1217	>	lock.writeLock().lock();
1218	>	assertHasWaiters(lock, c, t1, t2);
1219	>	c.signalAll();
1220	>	assertHasNoWaiters(lock, c);
1221	>	lock.writeLock().unlock();
1222	>	awaitTermination(t1);
1223	>	awaitTermination(t2);
1224	>	}
1225	>
1226	>	/**
1227	>	* A serialized lock deserializes as unlocked
1228	>	*/
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()      { 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	>	waitForQueuedThread(lock, t1);
1268	>	assertTrue(lock.hasQueuedThreads());
1269	>	t2.start();
1270	>	waitForQueuedThread(lock, t2);
1271	>	assertTrue(lock.hasQueuedThreads());
1272	>	t1.interrupt();
1273	>	awaitTermination(t1);
1274	>	assertTrue(lock.hasQueuedThreads());
1275	>	lock.writeLock().unlock();
1276	>	awaitTermination(t2);
1277	>	assertFalse(lock.hasQueuedThreads());
1278	>	}
1279	>
1280	>	/**
1281	>	* hasQueuedThread(null) throws NPE
1282	>	*/
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	>	lock.hasQueuedThread(null);
1289	>	shouldThrow();
1290	>	} catch (NullPointerException success) {}
1291	>	}
1292	>
1293	>	/**
1294	>	* hasQueuedThread reports whether a thread is queued
1295	>	*/
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	>	waitForQueuedThread(lock, t1);
1308	>	assertTrue(lock.hasQueuedThread(t1));
1309	>	assertFalse(lock.hasQueuedThread(t2));
1310	>	t2.start();
1311	>	waitForQueuedThread(lock, t2);
1312	>	assertTrue(lock.hasQueuedThread(t1));
1313	>	assertTrue(lock.hasQueuedThread(t2));
1314	>	t1.interrupt();
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
1324	+	/**
1325	+	* getQueueLength reports number of waiting threads
1326	+	*/
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	+	waitForQueuedThread(lock, t1);
1338	+	assertEquals(1, lock.getQueueLength());
1339	+	t2.start();
1340	+	waitForQueuedThread(lock, t2);
1341	+	assertEquals(2, lock.getQueueLength());
1342	+	t1.interrupt();
1343	+	awaitTermination(t1);
1344	+	assertEquals(1, lock.getQueueLength());
1345	+	lock.writeLock().unlock();
1346	+	awaitTermination(t2);
1347	+	assertEquals(0, lock.getQueueLength());
1348	+	}
1349	+
1350	+	/**
1351	+	* getQueuedThreads includes waiting threads
1352	+	*/
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	+	waitForQueuedThread(lock, t1);
1365	+	assertEquals(1, lock.getQueuedThreads().size());
1366	+	assertTrue(lock.getQueuedThreads().contains(t1));
1367	+	t2.start();
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	+	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	+	awaitTermination(t2);
1379	+	assertTrue(lock.getQueuedThreads().isEmpty());
1380	+	}
1381	+
1382	+	/**
1383	+	* hasWaiters throws NPE if null
1384	+	*/
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();
1392	+	} catch (NullPointerException success) {}
1393	+	}
1394	+
1395	+	/**
1396	+	* getWaitQueueLength throws NPE if null
1397	+	*/
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	+
1408	+	/**
1409	+	* getWaitingThreads throws NPE if null
1410	+	*/
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();
1418	+	} catch (NullPointerException success) {}
1419	+	}
1420	+
1421	+	/**
1422	+	* hasWaiters throws IllegalArgumentException if not owned
1423	+	*/
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(fair);
1430		try {
1431	<	t.start();
1432	<	Thread.sleep(SHORT_DELAY_MS);
1433	<	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	<	}
1431	>	lock2.hasWaiters(c);
1432	>	shouldThrow();
1433	>	} catch (IllegalArgumentException success) {}
1434		}
1435
1436	<	public void testAwait_Interrupt() {
1437	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1438	<	final Condition c = lock.writeLock().newCondition();
1439	<	Thread t = new Thread(new Runnable() {
1440	<	public void run() {
1441	<	try {
1442	<	lock.writeLock().lock();
1443	<	c.await();
1444	<	lock.writeLock().unlock();
1445	<	threadFail("should throw");
1446	<	}
1447	<	catch(InterruptedException success) {
510	<	}
511	<	}
512	<	});
513	<
514	<	try {
515	<	t.start();
516	<	Thread.sleep(SHORT_DELAY_MS);
517	<	t.interrupt();
518	<	t.join(SHORT_DELAY_MS);
519	<	assertFalse(t.isAlive());
520	<	}
521	<	catch (Exception ex) {
522	<	fail("unexpected exception");
523	<	}
524	<	}
525	<
526	<	public void testAwaitNanos_Interrupt() {
527	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
528	<	final Condition c = lock.writeLock().newCondition();
529	<	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	<	}
1436	>	/**
1437	>	* hasWaiters throws IllegalMonitorStateException if not locked
1438	>	*/
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);
1446	>	shouldThrow();
1447	>	} catch (IllegalMonitorStateException success) {}
1448		}
1449
1450	<	public void testSerialization() {
1451	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1452	<	l.readLock().lock();
1453	<	l.readLock().unlock();
1454	<
1455	<	try {
1456	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1457	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1458	<	out.writeObject(l);
1459	<	out.close();
1460	<
1461	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1462	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1463	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1464	<	r.readLock().lock();
1465	<	r.readLock().unlock();
1466	<	} catch(Exception e){
1467	<	e.printStackTrace();
1468	<	fail("unexpected exception");
1469	<	}
1450	>	/**
1451	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1452	>	*/
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(fair);
1459	>	try {
1460	>	lock2.getWaitQueueLength(c);
1461	>	shouldThrow();
1462	>	} catch (IllegalArgumentException success) {}
1463	>	}
1464	>
1465	>	/**
1466	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1467	>	*/
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);
1475	>	shouldThrow();
1476	>	} catch (IllegalMonitorStateException success) {}
1477	>	}
1478	>
1479	>	/**
1480	>	* getWaitingThreads throws IllegalArgumentException if not owned
1481	>	*/
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 =
1489	>	new PublicReentrantReadWriteLock(fair);
1490	>	try {
1491	>	lock2.getWaitingThreads(c);
1492	>	shouldThrow();
1493	>	} catch (IllegalArgumentException success) {}
1494	>	}
1495	>
1496	>	/**
1497	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1498	>	*/
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);
1507	>	shouldThrow();
1508	>	} catch (IllegalMonitorStateException success) {}
1509		}
1510
1511	+	/**
1512	+	* hasWaiters returns true when a thread is waiting, else false
1513	+	*/
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	+	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	+	await(locked);
1534	+	lock.writeLock().lock();
1535	+	assertHasWaiters(lock, c, t);
1536	+	assertTrue(lock.hasWaiters(c));
1537	+	c.signal();
1538	+	assertHasNoWaiters(lock, c);
1539	+	assertFalse(lock.hasWaiters(c));
1540	+	lock.writeLock().unlock();
1541	+	awaitTermination(t);
1542	+	assertHasNoWaiters(lock, c);
1543	+	}
1544	+
1545	+	/**
1546	+	* getWaitQueueLength returns number of waiting threads
1547	+	*/
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	+	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	+	await(locked);
1565	+	lock.writeLock().lock();
1566	+	assertHasWaiters(lock, c, t);
1567	+	assertEquals(1, lock.getWaitQueueLength(c));
1568	+	c.signal();
1569	+	assertHasNoWaiters(lock, c);
1570	+	assertEquals(0, lock.getWaitQueueLength(c));
1571	+	lock.writeLock().unlock();
1572	+	awaitTermination(t);
1573	+	}
1574	+
1575	+	/**
1576	+	* getWaitingThreads returns only and all waiting threads
1577	+	*/
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	+	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	+	await(locked1);
1610	+	t2.start();
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	+
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()      { 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	+	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()      { 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	+	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1658	+	}
1659	+
1660	+	/**
1661	+	* writeLock.toString indicates current lock state
1662	+	*/
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	+	assertTrue(lock.writeLock().toString().contains("Locked"));
1670	+	lock.writeLock().unlock();
1671	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672	+	}
1673
1674		}

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