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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 1.80 by jsr166, Sun May 14 02:03:15 2017 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.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	main(suite(), args);
27		}
28		public static Test suite() {
29	<	return new TestSuite(ReentrantReadWriteLockTest.class);
29	>	return new TestSuite(ReentrantReadWriteLockTest.class);
30		}
31
32	<	static int HOLD_COUNT_TEST_LIMIT = 20;
33	<
23	<	/*
24	<	* Unlocks an unlocked lock, throws Illegal Monitor State
25	<	*
32	>	/**
33	>	* A runnable calling lockInterruptibly
34		*/
35	<	public void testIllegalMonitorStateException(){
36	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
37	<	try{
38	<	rl.writeLock().unlock();
39	<	fail("Should of thown Illegal Monitor State Exception");
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36	>	final ReentrantReadWriteLock lock;
37	>	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
38	>	public void realRun() throws InterruptedException {
39	>	lock.writeLock().lockInterruptibly();
40	>	}
41	>	}
42
43	<	}catch(IllegalMonitorStateException success){}
43	>	/**
44	>	* A runnable calling lockInterruptibly that expects to be
45	>	* interrupted
46	>	*/
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48	>	final ReentrantReadWriteLock lock;
49	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
50	>	public void realRun() throws InterruptedException {
51	>	lock.writeLock().lockInterruptibly();
52	>	}
53		}
54
55	+	/**
56	+	* Subclass to expose protected methods
57	+	*/
58	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59	+	PublicReentrantReadWriteLock() { super(); }
60	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	+	public Thread getOwner() {
62	+	return super.getOwner();
63	+	}
64	+	public Collection<Thread> getQueuedThreads() {
65	+	return super.getQueuedThreads();
66	+	}
67	+	public Collection<Thread> getWaitingThreads(Condition c) {
68	+	return super.getWaitingThreads(c);
69	+	}
70	+	}
71
72	+	/**
73	+	* Releases write lock, checking that it had a hold count of 1.
74	+	*/
75	+	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	+	assertWriteLockedByMoi(lock);
78	+	assertEquals(1, lock.getWriteHoldCount());
79	+	writeLock.unlock();
80	+	assertNotWriteLocked(lock);
81	+	}
82
83	<	public void testInterruptedException(){
84	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
85	<	lock.writeLock().lock();
86	<	Thread t = new Thread(new Runnable() {
87	<	public void run(){
88	<	try{
89	<	lock.writeLock().lockInterruptibly();
90	<	threadFail("should throw");
91	<	}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");
83	>	/**
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85	>	*/
86	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
87	>	long startTime = System.nanoTime();
88	>	while (!lock.hasQueuedThread(t)) {
89	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	>	throw new AssertionFailedError("timed out");
91	>	Thread.yield();
92		}
93	+	assertTrue(t.isAlive());
94	+	assertNotSame(t, lock.getOwner());
95		}
96
97	<	public void testInterruptedException3(){
98	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
99	<	lock.writeLock().lock();
100	<	Thread t = new Thread(new Runnable() {
101	<	public void run(){
102	<	try{
103	<	lock.readLock().lockInterruptibly();
104	<	threadFail("should throw");
105	<	}catch(InterruptedException success){}
106	<	}
107	<	});
108	<	try {
109	<	t.start();
110	<	t.interrupt();
111	<	lock.writeLock().unlock();
112	<	t.join();
113	<	} catch(Exception e){
114	<	fail("unexpected exception");
115	<	}
116	<	}
117	<
118	<	public void testInterruptedException4(){
119	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
120	<	lock.writeLock().lock();
121	<	Thread t = new Thread(new Runnable() {
122	<	public void run(){
123	<	try{
124	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
125	<	threadFail("should throw");
126	<	}catch(InterruptedException success){}
127	<	}
128	<	});
129	<	try {
130	<	t.start();
131	<	t.interrupt();
132	<	t.join();
133	<	} catch(Exception e){
134	<	fail("unexpected exception");
97	>	/**
98	>	* Checks that lock is not write-locked.
99	>	*/
100	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
101	>	assertFalse(lock.isWriteLocked());
102	>	assertFalse(lock.isWriteLockedByCurrentThread());
103	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
104	>	assertEquals(0, lock.getWriteHoldCount());
105	>	assertEquals(0, lock.writeLock().getHoldCount());
106	>	assertNull(lock.getOwner());
107	>	}
108	>
109	>	/**
110	>	* Checks that lock is write-locked by the given thread.
111	>	*/
112	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
113	>	assertTrue(lock.isWriteLocked());
114	>	assertSame(t, lock.getOwner());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.isWriteLockedByCurrentThread());
117	>	assertEquals(t == Thread.currentThread(),
118	>	lock.writeLock().isHeldByCurrentThread());
119	>	assertEquals(t == Thread.currentThread(),
120	>	lock.getWriteHoldCount() > 0);
121	>	assertEquals(t == Thread.currentThread(),
122	>	lock.writeLock().getHoldCount() > 0);
123	>	assertEquals(0, lock.getReadLockCount());
124	>	}
125	>
126	>	/**
127	>	* Checks that lock is write-locked by the current thread.
128	>	*/
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131	>	}
132	>
133	>	/**
134	>	* Checks that condition c has no waiters.
135	>	*/
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139	>
140	>	/**
141	>	* Checks that condition c has exactly the given waiter threads.
142	>	*/
143	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
144	>	Thread... threads) {
145	>	lock.writeLock().lock();
146	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
147	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
148	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
149	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
150	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
151	>	new HashSet<Thread>(Arrays.asList(threads)));
152	>	lock.writeLock().unlock();
153	>	}
154	>
155	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	>
157	>	/**
158	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
159	>	*/
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	long timeoutMillis = 2 * LONG_DELAY_MS;
163	>	switch (awaitMethod) {
164	>	case await:
165	>	c.await();
166	>	break;
167	>	case awaitTimed:
168	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
169	>	break;
170	>	case awaitNanos:
171	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
172	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
173	>	assertTrue(nanosRemaining > timeoutNanos / 2);
174	>	assertTrue(nanosRemaining <= timeoutNanos);
175	>	break;
176	>	case awaitUntil:
177	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
178	>	break;
179	>	default:
180	>	throw new AssertionError();
181		}
182		}
183
184	<
185	<	public void testTryLockWhenLocked() {
186	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	lock.writeLock().lock();
188	<	Thread t = new Thread(new Runnable() {
189	<	public void run(){
190	<	threadAssertFalse(lock.writeLock().tryLock());
191	<	}
192	<	});
193	<	try {
194	<	t.start();
195	<	t.join();
184	>	/**
185	>	* Constructor sets given fairness, and is in unlocked state
186	>	*/
187	>	public void testConstructor() {
188	>	PublicReentrantReadWriteLock lock;
189	>
190	>	lock = new PublicReentrantReadWriteLock();
191	>	assertFalse(lock.isFair());
192	>	assertNotWriteLocked(lock);
193	>	assertEquals(0, lock.getReadLockCount());
194	>
195	>	lock = new PublicReentrantReadWriteLock(true);
196	>	assertTrue(lock.isFair());
197	>	assertNotWriteLocked(lock);
198	>	assertEquals(0, lock.getReadLockCount());
199	>
200	>	lock = new PublicReentrantReadWriteLock(false);
201	>	assertFalse(lock.isFair());
202	>	assertNotWriteLocked(lock);
203	>	assertEquals(0, lock.getReadLockCount());
204	>	}
205	>
206	>	/**
207	>	* write-locking and read-locking an unlocked lock succeed
208	>	*/
209	>	public void testLock()      { testLock(false); }
210	>	public void testLock_fair() { testLock(true); }
211	>	public void testLock(boolean fair) {
212	>	PublicReentrantReadWriteLock lock =
213	>	new PublicReentrantReadWriteLock(fair);
214	>	assertNotWriteLocked(lock);
215	>	lock.writeLock().lock();
216	>	assertWriteLockedByMoi(lock);
217	>	lock.writeLock().unlock();
218	>	assertNotWriteLocked(lock);
219	>	assertEquals(0, lock.getReadLockCount());
220	>	lock.readLock().lock();
221	>	assertNotWriteLocked(lock);
222	>	assertEquals(1, lock.getReadLockCount());
223	>	lock.readLock().unlock();
224	>	assertNotWriteLocked(lock);
225	>	assertEquals(0, lock.getReadLockCount());
226	>	}
227	>
228	>	/**
229	>	* getWriteHoldCount returns number of recursive holds
230	>	*/
231	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
232	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
233	>	public void testGetWriteHoldCount(boolean fair) {
234	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
235	>	for (int i = 1; i <= SIZE; i++) {
236	>	lock.writeLock().lock();
237	>	assertEquals(i,lock.getWriteHoldCount());
238	>	}
239	>	for (int i = SIZE; i > 0; i--) {
240		lock.writeLock().unlock();
241	<	} catch(Exception e){
135	<	fail("unexpected exception");
241	>	assertEquals(i - 1,lock.getWriteHoldCount());
242		}
243	<	}
243	>	}
244
245	<	public void testTryLockWhenLocked2() {
246	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
247	<	lock.writeLock().lock();
248	<	Thread t = new Thread(new Runnable() {
249	<	public void run(){
250	<	threadAssertFalse(lock.readLock().tryLock());
251	<	}
252	<	});
253	<	try {
254	<	t.start();
255	<	t.join();
245	>	/**
246	>	* writelock.getHoldCount returns number of recursive holds
247	>	*/
248	>	public void testGetHoldCount()      { testGetHoldCount(false); }
249	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
250	>	public void testGetHoldCount(boolean fair) {
251	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
252	>	for (int i = 1; i <= SIZE; i++) {
253	>	lock.writeLock().lock();
254	>	assertEquals(i,lock.writeLock().getHoldCount());
255	>	}
256	>	for (int i = SIZE; i > 0; i--) {
257		lock.writeLock().unlock();
258	<	} catch(Exception e){
152	<	fail("unexpected exception");
258	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
259		}
260	<	}
260	>	}
261
262	<	public void testMultipleReadLocks() {
263	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
264	<	lock.readLock().lock();
265	<	Thread t = new Thread(new Runnable() {
266	<	public void run(){
267	<	threadAssertTrue(lock.readLock().tryLock());
268	<	lock.readLock().unlock();
269	<	}
270	<	});
271	<	try {
272	<	t.start();
273	<	t.join();
262	>	/**
263	>	* getReadHoldCount returns number of recursive holds
264	>	*/
265	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
266	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
267	>	public void testGetReadHoldCount(boolean fair) {
268	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
269	>	for (int i = 1; i <= SIZE; i++) {
270	>	lock.readLock().lock();
271	>	assertEquals(i,lock.getReadHoldCount());
272	>	}
273	>	for (int i = SIZE; i > 0; i--) {
274		lock.readLock().unlock();
275	<	} catch(Exception e){
170	<	fail("unexpected exception");
275	>	assertEquals(i - 1,lock.getReadHoldCount());
276		}
277	<	}
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	<	});
277	>	}
278
279	+	/**
280	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
281	+	*/
282	+	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
283	+	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
284	+	public void testWriteUnlock_IMSE(boolean fair) {
285	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
286		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);
287		lock.writeLock().unlock();
288	<	t1.join(MEDIUM_DELAY_MS);
289	<	t2.join(MEDIUM_DELAY_MS);
290	<	assertTrue(!t1.isAlive());
291	<	assertTrue(!t2.isAlive());
292	<
293	<	} catch(Exception e){
294	<	fail("unexpected exception");
295	<	}
296	<	}
297	<
298	<
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	<	});
288	>	shouldThrow();
289	>	} catch (IllegalMonitorStateException success) {}
290	>	}
291	>
292	>	/**
293	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
294	>	*/
295	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
296	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
297	>	public void testReadUnlock_IMSE(boolean fair) {
298	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
299		try {
247	–	t.start();
248	–	t.join();
300		lock.readLock().unlock();
301	<	} catch(Exception e){
302	<	fail("unexpected exception");
303	<	}
253	<	}
301	>	shouldThrow();
302	>	} catch (IllegalMonitorStateException success) {}
303	>	}
304
305	<
305	>	/**
306	>	* write-lockInterruptibly is interruptible
307	>	*/
308	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
309	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
310	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
311	>	final PublicReentrantReadWriteLock lock =
312	>	new PublicReentrantReadWriteLock(fair);
313	>	lock.writeLock().lock();
314	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
315	>	public void realRun() throws InterruptedException {
316	>	lock.writeLock().lockInterruptibly();
317	>	}});
318	>
319	>	waitForQueuedThread(lock, t);
320	>	t.interrupt();
321	>	awaitTermination(t);
322	>	releaseWriteLock(lock);
323	>	}
324
325	<	public void testWriteTryLockWhenReadLocked() {
326	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
327	<	lock.readLock().lock();
328	<	Thread t = new Thread(new Runnable() {
329	<	public void run(){
330	<	threadAssertFalse(lock.writeLock().tryLock());
331	<	}
332	<	});
333	<	try {
334	<	t.start();
335	<	t.join();
336	<	lock.readLock().unlock();
337	<	} catch(Exception e){
338	<	fail("unexpected exception");
339	<	}
340	<	}
325	>	/**
326	>	* timed write-tryLock is interruptible
327	>	*/
328	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
329	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
330	>	public void testWriteTryLock_Interruptible(boolean fair) {
331	>	final PublicReentrantReadWriteLock lock =
332	>	new PublicReentrantReadWriteLock(fair);
333	>	lock.writeLock().lock();
334	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
335	>	public void realRun() throws InterruptedException {
336	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
337	>	}});
338	>
339	>	waitForQueuedThread(lock, t);
340	>	t.interrupt();
341	>	awaitTermination(t);
342	>	releaseWriteLock(lock);
343	>	}
344
345	<
345	>	/**
346	>	* read-lockInterruptibly is interruptible
347	>	*/
348	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
349	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
350	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
351	>	final PublicReentrantReadWriteLock lock =
352	>	new PublicReentrantReadWriteLock(fair);
353	>	lock.writeLock().lock();
354	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
355	>	public void realRun() throws InterruptedException {
356	>	lock.readLock().lockInterruptibly();
357	>	}});
358	>
359	>	waitForQueuedThread(lock, t);
360	>	t.interrupt();
361	>	awaitTermination(t);
362	>	releaseWriteLock(lock);
363	>	}
364
365	<	public void testTryLock_Timeout(){
366	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
367	<	lock.writeLock().lock();
368	<	Thread t = new Thread(new Runnable() {
369	<	public void run(){
370	<	try {
371	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
372	<	} catch (Exception ex) {
373	<	threadFail("unexpected exception");
374	<	}
375	<	}
376	<	});
377	<	try {
378	<	t.start();
379	<	t.join();
380	<	lock.writeLock().unlock();
381	<	} catch(Exception e){
382	<	fail("unexpected exception");
383	<	}
295	<	}
365	>	/**
366	>	* timed read-tryLock is interruptible
367	>	*/
368	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
369	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
370	>	public void testReadTryLock_Interruptible(boolean fair) {
371	>	final PublicReentrantReadWriteLock lock =
372	>	new PublicReentrantReadWriteLock(fair);
373	>	lock.writeLock().lock();
374	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
375	>	public void realRun() throws InterruptedException {
376	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
377	>	}});
378	>
379	>	waitForQueuedThread(lock, t);
380	>	t.interrupt();
381	>	awaitTermination(t);
382	>	releaseWriteLock(lock);
383	>	}
384
385	<	public void testTryLock_Timeout2(){
386	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
387	<	lock.writeLock().lock();
388	<	Thread t = new Thread(new Runnable() {
389	<	public void run(){
390	<	try {
391	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
392	<	} catch (Exception ex) {
393	<	threadFail("unexpected exception");
394	<	}
395	<	}
396	<	});
397	<	try {
398	<	t.start();
399	<	t.join();
400	<	lock.writeLock().unlock();
401	<	} catch(Exception e){
402	<	fail("unexpected exception");
403	<	}
404	<	}
385	>	/**
386	>	* write-tryLock on an unlocked lock succeeds
387	>	*/
388	>	public void testWriteTryLock()      { testWriteTryLock(false); }
389	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
390	>	public void testWriteTryLock(boolean fair) {
391	>	final PublicReentrantReadWriteLock lock =
392	>	new PublicReentrantReadWriteLock(fair);
393	>	assertTrue(lock.writeLock().tryLock());
394	>	assertWriteLockedByMoi(lock);
395	>	assertTrue(lock.writeLock().tryLock());
396	>	assertWriteLockedByMoi(lock);
397	>	lock.writeLock().unlock();
398	>	releaseWriteLock(lock);
399	>	}
400	>
401	>	/**
402	>	* write-tryLock fails if locked
403	>	*/
404	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
405	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
406	>	public void testWriteTryLockWhenLocked(boolean fair) {
407	>	final PublicReentrantReadWriteLock lock =
408	>	new PublicReentrantReadWriteLock(fair);
409	>	lock.writeLock().lock();
410	>	Thread t = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	assertFalse(lock.writeLock().tryLock());
413	>	}});
414	>
415	>	awaitTermination(t);
416	>	releaseWriteLock(lock);
417	>	}
418	>
419	>	/**
420	>	* read-tryLock fails if locked
421	>	*/
422	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
423	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
424	>	public void testReadTryLockWhenLocked(boolean fair) {
425	>	final PublicReentrantReadWriteLock lock =
426	>	new PublicReentrantReadWriteLock(fair);
427	>	lock.writeLock().lock();
428	>	Thread t = newStartedThread(new CheckedRunnable() {
429	>	public void realRun() {
430	>	assertFalse(lock.readLock().tryLock());
431	>	}});
432	>
433	>	awaitTermination(t);
434	>	releaseWriteLock(lock);
435	>	}
436	>
437	>	/**
438	>	* Multiple threads can hold a read lock when not write-locked
439	>	*/
440	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
441	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
442	>	public void testMultipleReadLocks(boolean fair) {
443	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
444	>	lock.readLock().lock();
445	>	Thread t = newStartedThread(new CheckedRunnable() {
446	>	public void realRun() throws InterruptedException {
447	>	assertTrue(lock.readLock().tryLock());
448	>	lock.readLock().unlock();
449	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
450	>	lock.readLock().unlock();
451	>	lock.readLock().lock();
452	>	lock.readLock().unlock();
453	>	}});
454
455	+	awaitTermination(t);
456	+	lock.readLock().unlock();
457	+	}
458
459	<	public void testLockInterruptibly() {
460	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
461	<	try {
459	>	/**
460	>	* A writelock succeeds only after a reading thread unlocks
461	>	*/
462	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
463	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
464	>	public void testWriteAfterReadLock(boolean fair) {
465	>	final PublicReentrantReadWriteLock lock =
466	>	new PublicReentrantReadWriteLock(fair);
467	>	lock.readLock().lock();
468	>	Thread t = newStartedThread(new CheckedRunnable() {
469	>	public void realRun() {
470	>	assertEquals(1, lock.getReadLockCount());
471	>	lock.writeLock().lock();
472	>	assertEquals(0, lock.getReadLockCount());
473	>	lock.writeLock().unlock();
474	>	}});
475	>	waitForQueuedThread(lock, t);
476	>	assertNotWriteLocked(lock);
477	>	assertEquals(1, lock.getReadLockCount());
478	>	lock.readLock().unlock();
479	>	assertEquals(0, lock.getReadLockCount());
480	>	awaitTermination(t);
481	>	assertNotWriteLocked(lock);
482	>	}
483	>
484	>	/**
485	>	* A writelock succeeds only after reading threads unlock
486	>	*/
487	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
488	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
489	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
490	>	final PublicReentrantReadWriteLock lock =
491	>	new PublicReentrantReadWriteLock(fair);
492	>	lock.readLock().lock();
493	>	lock.readLock().lock();
494	>	Thread t1 = newStartedThread(new CheckedRunnable() {
495	>	public void realRun() {
496	>	lock.readLock().lock();
497	>	assertEquals(3, lock.getReadLockCount());
498	>	lock.readLock().unlock();
499	>	}});
500	>	awaitTermination(t1);
501	>
502	>	Thread t2 = newStartedThread(new CheckedRunnable() {
503	>	public void realRun() {
504	>	assertEquals(2, lock.getReadLockCount());
505	>	lock.writeLock().lock();
506	>	assertEquals(0, lock.getReadLockCount());
507	>	lock.writeLock().unlock();
508	>	}});
509	>	waitForQueuedThread(lock, t2);
510	>	assertNotWriteLocked(lock);
511	>	assertEquals(2, lock.getReadLockCount());
512	>	lock.readLock().unlock();
513	>	lock.readLock().unlock();
514	>	assertEquals(0, lock.getReadLockCount());
515	>	awaitTermination(t2);
516	>	assertNotWriteLocked(lock);
517	>	}
518	>
519	>	/**
520	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
521	>	* will block if there is a waiting writer thread
522	>	*/
523	>	public void testReaderWriterReaderFairFifo() {
524	>	final PublicReentrantReadWriteLock lock =
525	>	new PublicReentrantReadWriteLock(true);
526	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
527	>
528	>	lock.readLock().lock();
529	>	Thread t1 = newStartedThread(new CheckedRunnable() {
530	>	public void realRun() {
531	>	assertEquals(1, lock.getReadLockCount());
532	>	lock.writeLock().lock();
533	>	assertEquals(0, lock.getReadLockCount());
534	>	t1GotLock.set(true);
535	>	lock.writeLock().unlock();
536	>	}});
537	>	waitForQueuedThread(lock, t1);
538	>
539	>	Thread t2 = newStartedThread(new CheckedRunnable() {
540	>	public void realRun() {
541	>	assertEquals(1, lock.getReadLockCount());
542	>	lock.readLock().lock();
543	>	assertEquals(1, lock.getReadLockCount());
544	>	assertTrue(t1GotLock.get());
545	>	lock.readLock().unlock();
546	>	}});
547	>	waitForQueuedThread(lock, t2);
548	>	assertTrue(t1.isAlive());
549	>	assertNotWriteLocked(lock);
550	>	assertEquals(1, lock.getReadLockCount());
551	>	lock.readLock().unlock();
552	>	awaitTermination(t1);
553	>	awaitTermination(t2);
554	>	assertNotWriteLocked(lock);
555	>	}
556	>
557	>	/**
558	>	* Readlocks succeed only after a writing thread unlocks
559	>	*/
560	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
561	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
562	>	public void testReadAfterWriteLock(boolean fair) {
563	>	final PublicReentrantReadWriteLock lock =
564	>	new PublicReentrantReadWriteLock(fair);
565	>	lock.writeLock().lock();
566	>	Thread t1 = newStartedThread(new CheckedRunnable() {
567	>	public void realRun() {
568	>	lock.readLock().lock();
569	>	lock.readLock().unlock();
570	>	}});
571	>	Thread t2 = newStartedThread(new CheckedRunnable() {
572	>	public void realRun() {
573	>	lock.readLock().lock();
574	>	lock.readLock().unlock();
575	>	}});
576	>
577	>	waitForQueuedThread(lock, t1);
578	>	waitForQueuedThread(lock, t2);
579	>	releaseWriteLock(lock);
580	>	awaitTermination(t1);
581	>	awaitTermination(t2);
582	>	}
583	>
584	>	/**
585	>	* Read trylock succeeds if write locked by current thread
586	>	*/
587	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
588	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
589	>	public void testReadHoldingWriteLock(boolean fair) {
590	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
591	>	lock.writeLock().lock();
592	>	assertTrue(lock.readLock().tryLock());
593	>	lock.readLock().unlock();
594	>	lock.writeLock().unlock();
595	>	}
596	>
597	>	/**
598	>	* Read trylock succeeds (barging) even in the presence of waiting
599	>	* readers and/or writers
600	>	*/
601	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
602	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
603	>	public void testReadTryLockBarging(boolean fair) {
604	>	final PublicReentrantReadWriteLock lock =
605	>	new PublicReentrantReadWriteLock(fair);
606	>	lock.readLock().lock();
607	>
608	>	Thread t1 = newStartedThread(new CheckedRunnable() {
609	>	public void realRun() {
610	>	lock.writeLock().lock();
611	>	lock.writeLock().unlock();
612	>	}});
613	>
614	>	waitForQueuedThread(lock, t1);
615	>
616	>	Thread t2 = newStartedThread(new CheckedRunnable() {
617	>	public void realRun() {
618	>	lock.readLock().lock();
619	>	lock.readLock().unlock();
620	>	}});
621	>
622	>	if (fair)
623	>	waitForQueuedThread(lock, t2);
624	>
625	>	Thread t3 = newStartedThread(new CheckedRunnable() {
626	>	public void realRun() {
627	>	lock.readLock().tryLock();
628	>	lock.readLock().unlock();
629	>	}});
630	>
631	>	assertTrue(lock.getReadLockCount() > 0);
632	>	awaitTermination(t3);
633	>	assertTrue(t1.isAlive());
634	>	if (fair) assertTrue(t2.isAlive());
635	>	lock.readLock().unlock();
636	>	awaitTermination(t1);
637	>	awaitTermination(t2);
638	>	}
639	>
640	>	/**
641	>	* Read lock succeeds if write locked by current thread even if
642	>	* other threads are waiting for readlock
643	>	*/
644	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
645	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
646	>	public void testReadHoldingWriteLock2(boolean fair) {
647	>	final PublicReentrantReadWriteLock lock =
648	>	new PublicReentrantReadWriteLock(fair);
649	>	lock.writeLock().lock();
650	>	lock.readLock().lock();
651	>	lock.readLock().unlock();
652	>
653	>	Thread t1 = newStartedThread(new CheckedRunnable() {
654	>	public void realRun() {
655	>	lock.readLock().lock();
656	>	lock.readLock().unlock();
657	>	}});
658	>	Thread t2 = newStartedThread(new CheckedRunnable() {
659	>	public void realRun() {
660	>	lock.readLock().lock();
661	>	lock.readLock().unlock();
662	>	}});
663	>
664	>	waitForQueuedThread(lock, t1);
665	>	waitForQueuedThread(lock, t2);
666	>	assertWriteLockedByMoi(lock);
667	>	lock.readLock().lock();
668	>	lock.readLock().unlock();
669	>	releaseWriteLock(lock);
670	>	awaitTermination(t1);
671	>	awaitTermination(t2);
672	>	}
673	>
674	>	/**
675	>	* Read lock succeeds if write locked by current thread even if
676	>	* other threads are waiting for writelock
677	>	*/
678	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
679	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
680	>	public void testReadHoldingWriteLock3(boolean fair) {
681	>	final PublicReentrantReadWriteLock lock =
682	>	new PublicReentrantReadWriteLock(fair);
683	>	lock.writeLock().lock();
684	>	lock.readLock().lock();
685	>	lock.readLock().unlock();
686	>
687	>	Thread t1 = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() {
689	>	lock.writeLock().lock();
690	>	lock.writeLock().unlock();
691	>	}});
692	>	Thread t2 = newStartedThread(new CheckedRunnable() {
693	>	public void realRun() {
694	>	lock.writeLock().lock();
695	>	lock.writeLock().unlock();
696	>	}});
697	>
698	>	waitForQueuedThread(lock, t1);
699	>	waitForQueuedThread(lock, t2);
700	>	assertWriteLockedByMoi(lock);
701	>	lock.readLock().lock();
702	>	lock.readLock().unlock();
703	>	assertWriteLockedByMoi(lock);
704	>	lock.writeLock().unlock();
705	>	awaitTermination(t1);
706	>	awaitTermination(t2);
707	>	}
708	>
709	>	/**
710	>	* Write lock succeeds if write locked by current thread even if
711	>	* other threads are waiting for writelock
712	>	*/
713	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
714	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
715	>	public void testWriteHoldingWriteLock4(boolean fair) {
716	>	final PublicReentrantReadWriteLock lock =
717	>	new PublicReentrantReadWriteLock(fair);
718	>	lock.writeLock().lock();
719	>	lock.writeLock().lock();
720	>	lock.writeLock().unlock();
721	>
722	>	Thread t1 = newStartedThread(new CheckedRunnable() {
723	>	public void realRun() {
724	>	lock.writeLock().lock();
725	>	lock.writeLock().unlock();
726	>	}});
727	>	Thread t2 = newStartedThread(new CheckedRunnable() {
728	>	public void realRun() {
729	>	lock.writeLock().lock();
730	>	lock.writeLock().unlock();
731	>	}});
732	>
733	>	waitForQueuedThread(lock, t1);
734	>	waitForQueuedThread(lock, t2);
735	>	assertWriteLockedByMoi(lock);
736	>	assertEquals(1, lock.getWriteHoldCount());
737	>	lock.writeLock().lock();
738	>	assertWriteLockedByMoi(lock);
739	>	assertEquals(2, lock.getWriteHoldCount());
740	>	lock.writeLock().unlock();
741	>	assertWriteLockedByMoi(lock);
742	>	assertEquals(1, lock.getWriteHoldCount());
743	>	lock.writeLock().unlock();
744	>	awaitTermination(t1);
745	>	awaitTermination(t2);
746	>	}
747	>
748	>	/**
749	>	* Read tryLock succeeds if readlocked but not writelocked
750	>	*/
751	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
752	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
753	>	public void testTryLockWhenReadLocked(boolean fair) {
754	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
755	>	lock.readLock().lock();
756	>	Thread t = newStartedThread(new CheckedRunnable() {
757	>	public void realRun() {
758	>	assertTrue(lock.readLock().tryLock());
759	>	lock.readLock().unlock();
760	>	}});
761	>
762	>	awaitTermination(t);
763	>	lock.readLock().unlock();
764	>	}
765	>
766	>	/**
767	>	* write tryLock fails when readlocked
768	>	*/
769	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
770	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
771	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
772	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
773	>	lock.readLock().lock();
774	>	Thread t = newStartedThread(new CheckedRunnable() {
775	>	public void realRun() {
776	>	assertFalse(lock.writeLock().tryLock());
777	>	}});
778	>
779	>	awaitTermination(t);
780	>	lock.readLock().unlock();
781	>	}
782	>
783	>	/**
784	>	* write timed tryLock times out if locked
785	>	*/
786	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
787	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
788	>	public void testWriteTryLock_Timeout(boolean fair) {
789	>	final PublicReentrantReadWriteLock lock =
790	>	new PublicReentrantReadWriteLock(fair);
791	>	final long timeoutMillis = timeoutMillis();
792	>	lock.writeLock().lock();
793	>	Thread t = newStartedThread(new CheckedRunnable() {
794	>	public void realRun() throws InterruptedException {
795	>	long startTime = System.nanoTime();
796	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
797	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
798	>	}});
799	>
800	>	awaitTermination(t);
801	>	releaseWriteLock(lock);
802	>	}
803	>
804	>	/**
805	>	* read timed tryLock times out if write-locked
806	>	*/
807	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
808	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
809	>	public void testReadTryLock_Timeout(boolean fair) {
810	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
811	>	lock.writeLock().lock();
812	>	Thread t = newStartedThread(new CheckedRunnable() {
813	>	public void realRun() throws InterruptedException {
814	>	long startTime = System.nanoTime();
815	>	long timeoutMillis = timeoutMillis();
816	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
817	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
818	>	}});
819	>
820	>	awaitTermination(t);
821	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
822	>	lock.writeLock().unlock();
823	>	}
824	>
825	>	/**
826	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
827	>	*/
828	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
829	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
830	>	public void testWriteLockInterruptibly(boolean fair) {
831	>	final PublicReentrantReadWriteLock lock =
832	>	new PublicReentrantReadWriteLock(fair);
833	>	try {
834		lock.writeLock().lockInterruptibly();
835	<	} catch(Exception e) {
836	<	fail("unexpected exception");
837	<	}
838	<	Thread t = new Thread(new Runnable() {
839	<	public void run() {
840	<	try {
841	<	lock.writeLock().lockInterruptibly();
842	<	threadFail("should throw");
843	<	}
844	<	catch(InterruptedException success) {
845	<	}
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	<	}
835	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
836	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
837	>	public void realRun() throws InterruptedException {
838	>	lock.writeLock().lockInterruptibly();
839	>	}});
840	>
841	>	waitForQueuedThread(lock, t);
842	>	t.interrupt();
843	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
844	>	awaitTermination(t);
845	>	releaseWriteLock(lock);
846		}
847
848	<	public void testLockInterruptibly2() {
849	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
850	<	try {
848	>	/**
849	>	* read lockInterruptibly succeeds if lock free else is interruptible
850	>	*/
851	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
852	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
853	>	public void testReadLockInterruptibly(boolean fair) {
854	>	final PublicReentrantReadWriteLock lock =
855	>	new PublicReentrantReadWriteLock(fair);
856	>	try {
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859		lock.writeLock().lockInterruptibly();
860	<	} catch(Exception e) {
861	<	fail("unexpected exception");
862	<	}
863	<	Thread t = new Thread(new Runnable() {
864	<	public void run() {
865	<	try {
866	<	lock.readLock().lockInterruptibly();
867	<	threadFail("should throw");
868	<	}
869	<	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	<	}
860	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
861	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
862	>	public void realRun() throws InterruptedException {
863	>	lock.readLock().lockInterruptibly();
864	>	}});
865	>
866	>	waitForQueuedThread(lock, t);
867	>	t.interrupt();
868	>	awaitTermination(t);
869	>	releaseWriteLock(lock);
870		}
871
872	<	public void testAwait_IllegalMonitor() {
873	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
872	>	/**
873	>	* Calling await without holding lock throws IllegalMonitorStateException
874	>	*/
875	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
876	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
877	>	public void testAwait_IMSE(boolean fair) {
878	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
879		final Condition c = lock.writeLock().newCondition();
880	<	try {
881	<	c.await();
882	<	fail("should throw");
883	<	}
884	<	catch (IllegalMonitorStateException success) {
885	<	}
886	<	catch (Exception ex) {
887	<	fail("should throw IMSE");
880	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
881	>	long startTime = System.nanoTime();
882	>	try {
883	>	await(c, awaitMethod);
884	>	shouldThrow();
885	>	} catch (IllegalMonitorStateException success) {
886	>	} catch (InterruptedException fail) {
887	>	threadUnexpectedException(fail);
888	>	}
889	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
890		}
891		}
892
893	<	public void testSignal_IllegalMonitor() {
894	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
893	>	/**
894	>	* Calling signal without holding lock throws IllegalMonitorStateException
895	>	*/
896	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
897	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
898	>	public void testSignal_IMSE(boolean fair) {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
900		final Condition c = lock.writeLock().newCondition();
901		try {
902		c.signal();
903	<	fail("should throw");
904	<	}
394	<	catch (IllegalMonitorStateException success) {
395	<	}
396	<	catch (Exception ex) {
397	<	fail("should throw IMSE");
398	<	}
903	>	shouldThrow();
904	>	} catch (IllegalMonitorStateException success) {}
905		}
906
907	<	public void testAwaitNanos_Timeout() {
908	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
907	>	/**
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909	>	*/
910	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
911	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
912	>	public void testSignalAll_IMSE(boolean fair) {
913	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
914		final Condition c = lock.writeLock().newCondition();
915		try {
916	<	lock.writeLock().lock();
917	<	long t = c.awaitNanos(100);
918	<	assertTrue(t <= 0);
919	<	lock.writeLock().unlock();
920	<	}
921	<	catch (Exception ex) {
922	<	fail("unexpected exception");
923	<	}
916	>	c.signalAll();
917	>	shouldThrow();
918	>	} catch (IllegalMonitorStateException success) {}
919	>	}
920	>
921	>	/**
922	>	* awaitNanos without a signal times out
923	>	*/
924	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
925	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
926	>	public void testAwaitNanos_Timeout(boolean fair) {
927	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
928	>	final Condition c = lock.writeLock().newCondition();
929	>	final long timeoutMillis = timeoutMillis();
930	>	lock.writeLock().lock();
931	>	final long startTime = System.nanoTime();
932	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	>	try {
934	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
935	>	assertTrue(nanosRemaining <= 0);
936	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
937	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
938	>	lock.writeLock().unlock();
939	>	}
940	>
941	>	/**
942	>	* timed await without a signal times out
943	>	*/
944	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
945	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
946	>	public void testAwait_Timeout(boolean fair) {
947	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
948	>	final Condition c = lock.writeLock().newCondition();
949	>	final long timeoutMillis = timeoutMillis();
950	>	lock.writeLock().lock();
951	>	final long startTime = System.nanoTime();
952	>	try {
953	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
954	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
955	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
956	>	lock.writeLock().unlock();
957	>	}
958	>
959	>	/**
960	>	* awaitUntil without a signal times out
961	>	*/
962	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
963	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
964	>	public void testAwaitUntil_Timeout(boolean fair) {
965	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
966	>	final Condition c = lock.writeLock().newCondition();
967	>	lock.writeLock().lock();
968	>	// We shouldn't assume that nanoTime and currentTimeMillis
969	>	// use the same time source, so don't use nanoTime here.
970	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
971	>	try {
972	>	assertFalse(c.awaitUntil(delayedDate));
973	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
974	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
975	>	lock.writeLock().unlock();
976	>	}
977	>
978	>	/**
979	>	* await returns when signalled
980	>	*/
981	>	public void testAwait()      { testAwait(false); }
982	>	public void testAwait_fair() { testAwait(true); }
983	>	public void testAwait(boolean fair) {
984	>	final PublicReentrantReadWriteLock lock =
985	>	new PublicReentrantReadWriteLock(fair);
986	>	final Condition c = lock.writeLock().newCondition();
987	>	final CountDownLatch locked = new CountDownLatch(1);
988	>	Thread t = newStartedThread(new CheckedRunnable() {
989	>	public void realRun() throws InterruptedException {
990	>	lock.writeLock().lock();
991	>	locked.countDown();
992	>	c.await();
993	>	lock.writeLock().unlock();
994	>	}});
995	>
996	>	await(locked);
997	>	lock.writeLock().lock();
998	>	assertHasWaiters(lock, c, t);
999	>	c.signal();
1000	>	assertHasNoWaiters(lock, c);
1001	>	assertTrue(t.isAlive());
1002	>	lock.writeLock().unlock();
1003	>	awaitTermination(t);
1004	>	}
1005	>
1006	>	/**
1007	>	* awaitUninterruptibly is uninterruptible
1008	>	*/
1009	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1010	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1011	>	public void testAwaitUninterruptibly(boolean fair) {
1012	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1013	>	final Condition condition = lock.newCondition();
1014	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1015	>
1016	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	>	public void realRun() {
1018	>	// Interrupt before awaitUninterruptibly
1019	>	lock.lock();
1020	>	pleaseInterrupt.countDown();
1021	>	Thread.currentThread().interrupt();
1022	>	condition.awaitUninterruptibly();
1023	>	assertTrue(Thread.interrupted());
1024	>	lock.unlock();
1025	>	}});
1026	>
1027	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1028	>	public void realRun() {
1029	>	// Interrupt during awaitUninterruptibly
1030	>	lock.lock();
1031	>	pleaseInterrupt.countDown();
1032	>	condition.awaitUninterruptibly();
1033	>	assertTrue(Thread.interrupted());
1034	>	lock.unlock();
1035	>	}});
1036	>
1037	>	await(pleaseInterrupt);
1038	>	t2.interrupt();
1039	>	lock.lock();
1040	>	lock.unlock();
1041	>	assertThreadBlocks(t1, Thread.State.WAITING);
1042	>	assertThreadBlocks(t2, Thread.State.WAITING);
1043	>
1044	>	lock.lock();
1045	>	condition.signalAll();
1046	>	lock.unlock();
1047	>
1048	>	awaitTermination(t1);
1049	>	awaitTermination(t2);
1050	>	}
1051	>
1052	>	/**
1053	>	* await/awaitNanos/awaitUntil is interruptible
1054	>	*/
1055	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1056	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1057	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1058	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1059	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1060	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1061	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1062	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1063	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1064	>	final PublicReentrantReadWriteLock lock =
1065	>	new PublicReentrantReadWriteLock(fair);
1066	>	final Condition c = lock.writeLock().newCondition();
1067	>	final CountDownLatch locked = new CountDownLatch(1);
1068	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1069	>	public void realRun() throws InterruptedException {
1070	>	lock.writeLock().lock();
1071	>	assertWriteLockedByMoi(lock);
1072	>	assertHasNoWaiters(lock, c);
1073	>	locked.countDown();
1074	>	try {
1075	>	await(c, awaitMethod);
1076	>	} finally {
1077	>	assertWriteLockedByMoi(lock);
1078	>	assertHasNoWaiters(lock, c);
1079	>	lock.writeLock().unlock();
1080	>	assertFalse(Thread.interrupted());
1081	>	}
1082	>	}});
1083	>
1084	>	await(locked);
1085	>	assertHasWaiters(lock, c, t);
1086	>	t.interrupt();
1087	>	awaitTermination(t);
1088	>	assertNotWriteLocked(lock);
1089	>	}
1090	>
1091	>	/**
1092	>	* signalAll wakes up all threads
1093	>	*/
1094	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1095	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1096	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1097	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1098	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1099	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1100	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1101	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1102	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1103	>	final PublicReentrantReadWriteLock lock =
1104	>	new PublicReentrantReadWriteLock(fair);
1105	>	final Condition c = lock.writeLock().newCondition();
1106	>	final CountDownLatch locked = new CountDownLatch(2);
1107	>	final Lock writeLock = lock.writeLock();
1108	>	class Awaiter extends CheckedRunnable {
1109	>	public void realRun() throws InterruptedException {
1110	>	writeLock.lock();
1111	>	locked.countDown();
1112	>	await(c, awaitMethod);
1113	>	writeLock.unlock();
1114	>	}
1115	>	}
1116	>
1117	>	Thread t1 = newStartedThread(new Awaiter());
1118	>	Thread t2 = newStartedThread(new Awaiter());
1119	>
1120	>	await(locked);
1121	>	writeLock.lock();
1122	>	assertHasWaiters(lock, c, t1, t2);
1123	>	c.signalAll();
1124	>	assertHasNoWaiters(lock, c);
1125	>	writeLock.unlock();
1126	>	awaitTermination(t1);
1127	>	awaitTermination(t2);
1128		}
1129
1130	<	public void testAwait_Timeout() {
1131	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1130	>	/**
1131	>	* signal wakes up waiting threads in FIFO order
1132	>	*/
1133	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1134	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1135	>	public void testSignalWakesFifo(boolean fair) {
1136	>	final PublicReentrantReadWriteLock lock =
1137	>	new PublicReentrantReadWriteLock(fair);
1138	>	final Condition c = lock.writeLock().newCondition();
1139	>	final CountDownLatch locked1 = new CountDownLatch(1);
1140	>	final CountDownLatch locked2 = new CountDownLatch(1);
1141	>	final Lock writeLock = lock.writeLock();
1142	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1143	>	public void realRun() throws InterruptedException {
1144	>	writeLock.lock();
1145	>	locked1.countDown();
1146	>	c.await();
1147	>	writeLock.unlock();
1148	>	}});
1149	>
1150	>	await(locked1);
1151	>
1152	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1153	>	public void realRun() throws InterruptedException {
1154	>	writeLock.lock();
1155	>	locked2.countDown();
1156	>	c.await();
1157	>	writeLock.unlock();
1158	>	}});
1159	>
1160	>	await(locked2);
1161	>
1162	>	writeLock.lock();
1163	>	assertHasWaiters(lock, c, t1, t2);
1164	>	assertFalse(lock.hasQueuedThreads());
1165	>	c.signal();
1166	>	assertHasWaiters(lock, c, t2);
1167	>	assertTrue(lock.hasQueuedThread(t1));
1168	>	assertFalse(lock.hasQueuedThread(t2));
1169	>	c.signal();
1170	>	assertHasNoWaiters(lock, c);
1171	>	assertTrue(lock.hasQueuedThread(t1));
1172	>	assertTrue(lock.hasQueuedThread(t2));
1173	>	writeLock.unlock();
1174	>	awaitTermination(t1);
1175	>	awaitTermination(t2);
1176	>	}
1177	>
1178	>	/**
1179	>	* await after multiple reentrant locking preserves lock count
1180	>	*/
1181	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1182	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1183	>	public void testAwaitLockCount(boolean fair) {
1184	>	final PublicReentrantReadWriteLock lock =
1185	>	new PublicReentrantReadWriteLock(fair);
1186		final Condition c = lock.writeLock().newCondition();
1187	+	final CountDownLatch locked = new CountDownLatch(2);
1188	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1189	+	public void realRun() throws InterruptedException {
1190	+	lock.writeLock().lock();
1191	+	assertWriteLockedByMoi(lock);
1192	+	assertEquals(1, lock.writeLock().getHoldCount());
1193	+	locked.countDown();
1194	+	c.await();
1195	+	assertWriteLockedByMoi(lock);
1196	+	assertEquals(1, lock.writeLock().getHoldCount());
1197	+	lock.writeLock().unlock();
1198	+	}});
1199	+
1200	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1201	+	public void realRun() throws InterruptedException {
1202	+	lock.writeLock().lock();
1203	+	lock.writeLock().lock();
1204	+	assertWriteLockedByMoi(lock);
1205	+	assertEquals(2, lock.writeLock().getHoldCount());
1206	+	locked.countDown();
1207	+	c.await();
1208	+	assertWriteLockedByMoi(lock);
1209	+	assertEquals(2, lock.writeLock().getHoldCount());
1210	+	lock.writeLock().unlock();
1211	+	lock.writeLock().unlock();
1212	+	}});
1213	+
1214	+	await(locked);
1215	+	lock.writeLock().lock();
1216	+	assertHasWaiters(lock, c, t1, t2);
1217	+	c.signalAll();
1218	+	assertHasNoWaiters(lock, c);
1219	+	lock.writeLock().unlock();
1220	+	awaitTermination(t1);
1221	+	awaitTermination(t2);
1222	+	}
1223	+
1224	+	/**
1225	+	* A serialized lock deserializes as unlocked
1226	+	*/
1227	+	public void testSerialization()      { testSerialization(false); }
1228	+	public void testSerialization_fair() { testSerialization(true); }
1229	+	public void testSerialization(boolean fair) {
1230	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1231	+	lock.writeLock().lock();
1232	+	lock.readLock().lock();
1233	+
1234	+	ReentrantReadWriteLock clone = serialClone(lock);
1235	+	assertEquals(lock.isFair(), clone.isFair());
1236	+	assertTrue(lock.isWriteLocked());
1237	+	assertFalse(clone.isWriteLocked());
1238	+	assertEquals(1, lock.getReadLockCount());
1239	+	assertEquals(0, clone.getReadLockCount());
1240	+	clone.writeLock().lock();
1241	+	clone.readLock().lock();
1242	+	assertTrue(clone.isWriteLocked());
1243	+	assertEquals(1, clone.getReadLockCount());
1244	+	clone.readLock().unlock();
1245	+	clone.writeLock().unlock();
1246	+	assertFalse(clone.isWriteLocked());
1247	+	assertEquals(1, lock.getReadLockCount());
1248	+	assertEquals(0, clone.getReadLockCount());
1249	+	}
1250	+
1251	+	/**
1252	+	* hasQueuedThreads reports whether there are waiting threads
1253	+	*/
1254	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1255	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1256	+	public void testHasQueuedThreads(boolean fair) {
1257	+	final PublicReentrantReadWriteLock lock =
1258	+	new PublicReentrantReadWriteLock(fair);
1259	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1260	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1261	+	assertFalse(lock.hasQueuedThreads());
1262	+	lock.writeLock().lock();
1263	+	assertFalse(lock.hasQueuedThreads());
1264	+	t1.start();
1265	+	waitForQueuedThread(lock, t1);
1266	+	assertTrue(lock.hasQueuedThreads());
1267	+	t2.start();
1268	+	waitForQueuedThread(lock, t2);
1269	+	assertTrue(lock.hasQueuedThreads());
1270	+	t1.interrupt();
1271	+	awaitTermination(t1);
1272	+	assertTrue(lock.hasQueuedThreads());
1273	+	lock.writeLock().unlock();
1274	+	awaitTermination(t2);
1275	+	assertFalse(lock.hasQueuedThreads());
1276	+	}
1277	+
1278	+	/**
1279	+	* hasQueuedThread(null) throws NPE
1280	+	*/
1281	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1282	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1283	+	public void testHasQueuedThreadNPE(boolean fair) {
1284	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1285	+	try {
1286	+	lock.hasQueuedThread(null);
1287	+	shouldThrow();
1288	+	} catch (NullPointerException success) {}
1289	+	}
1290	+
1291	+	/**
1292	+	* hasQueuedThread reports whether a thread is queued
1293	+	*/
1294	+	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1295	+	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1296	+	public void testHasQueuedThread(boolean fair) {
1297	+	final PublicReentrantReadWriteLock lock =
1298	+	new PublicReentrantReadWriteLock(fair);
1299	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1300	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1301	+	assertFalse(lock.hasQueuedThread(t1));
1302	+	assertFalse(lock.hasQueuedThread(t2));
1303	+	lock.writeLock().lock();
1304	+	t1.start();
1305	+	waitForQueuedThread(lock, t1);
1306	+	assertTrue(lock.hasQueuedThread(t1));
1307	+	assertFalse(lock.hasQueuedThread(t2));
1308	+	t2.start();
1309	+	waitForQueuedThread(lock, t2);
1310	+	assertTrue(lock.hasQueuedThread(t1));
1311	+	assertTrue(lock.hasQueuedThread(t2));
1312	+	t1.interrupt();
1313	+	awaitTermination(t1);
1314	+	assertFalse(lock.hasQueuedThread(t1));
1315	+	assertTrue(lock.hasQueuedThread(t2));
1316	+	lock.writeLock().unlock();
1317	+	awaitTermination(t2);
1318	+	assertFalse(lock.hasQueuedThread(t1));
1319	+	assertFalse(lock.hasQueuedThread(t2));
1320	+	}
1321	+
1322	+	/**
1323	+	* getQueueLength reports number of waiting threads
1324	+	*/
1325	+	public void testGetQueueLength()      { testGetQueueLength(false); }
1326	+	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1327	+	public void testGetQueueLength(boolean fair) {
1328	+	final PublicReentrantReadWriteLock lock =
1329	+	new PublicReentrantReadWriteLock(fair);
1330	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1331	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1332	+	assertEquals(0, lock.getQueueLength());
1333	+	lock.writeLock().lock();
1334	+	t1.start();
1335	+	waitForQueuedThread(lock, t1);
1336	+	assertEquals(1, lock.getQueueLength());
1337	+	t2.start();
1338	+	waitForQueuedThread(lock, t2);
1339	+	assertEquals(2, lock.getQueueLength());
1340	+	t1.interrupt();
1341	+	awaitTermination(t1);
1342	+	assertEquals(1, lock.getQueueLength());
1343	+	lock.writeLock().unlock();
1344	+	awaitTermination(t2);
1345	+	assertEquals(0, lock.getQueueLength());
1346	+	}
1347	+
1348	+	/**
1349	+	* getQueuedThreads includes waiting threads
1350	+	*/
1351	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1352	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1353	+	public void testGetQueuedThreads(boolean fair) {
1354	+	final PublicReentrantReadWriteLock lock =
1355	+	new PublicReentrantReadWriteLock(fair);
1356	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1357	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1358	+	assertTrue(lock.getQueuedThreads().isEmpty());
1359	+	lock.writeLock().lock();
1360	+	assertTrue(lock.getQueuedThreads().isEmpty());
1361	+	t1.start();
1362	+	waitForQueuedThread(lock, t1);
1363	+	assertEquals(1, lock.getQueuedThreads().size());
1364	+	assertTrue(lock.getQueuedThreads().contains(t1));
1365	+	t2.start();
1366	+	waitForQueuedThread(lock, t2);
1367	+	assertEquals(2, lock.getQueuedThreads().size());
1368	+	assertTrue(lock.getQueuedThreads().contains(t1));
1369	+	assertTrue(lock.getQueuedThreads().contains(t2));
1370	+	t1.interrupt();
1371	+	awaitTermination(t1);
1372	+	assertFalse(lock.getQueuedThreads().contains(t1));
1373	+	assertTrue(lock.getQueuedThreads().contains(t2));
1374	+	assertEquals(1, lock.getQueuedThreads().size());
1375	+	lock.writeLock().unlock();
1376	+	awaitTermination(t2);
1377	+	assertTrue(lock.getQueuedThreads().isEmpty());
1378	+	}
1379	+
1380	+	/**
1381	+	* hasWaiters throws NPE if null
1382	+	*/
1383	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1384	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1385	+	public void testHasWaitersNPE(boolean fair) {
1386	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1387	+	try {
1388	+	lock.hasWaiters(null);
1389	+	shouldThrow();
1390	+	} catch (NullPointerException success) {}
1391	+	}
1392	+
1393	+	/**
1394	+	* getWaitQueueLength throws NPE if null
1395	+	*/
1396	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1397	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1398	+	public void testGetWaitQueueLengthNPE(boolean fair) {
1399	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1400	+	try {
1401	+	lock.getWaitQueueLength(null);
1402	+	shouldThrow();
1403	+	} catch (NullPointerException success) {}
1404	+	}
1405	+
1406	+	/**
1407	+	* getWaitingThreads throws NPE if null
1408	+	*/
1409	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1410	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1411	+	public void testGetWaitingThreadsNPE(boolean fair) {
1412	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1413	+	try {
1414	+	lock.getWaitingThreads(null);
1415	+	shouldThrow();
1416	+	} catch (NullPointerException success) {}
1417	+	}
1418	+
1419	+	/**
1420	+	* hasWaiters throws IllegalArgumentException if not owned
1421	+	*/
1422	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1423	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1424	+	public void testHasWaitersIAE(boolean fair) {
1425	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1426	+	final Condition c = lock.writeLock().newCondition();
1427	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1428		try {
1429	<	lock.writeLock().lock();
1430	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
1431	<	lock.writeLock().unlock();
422	<	}
423	<	catch (Exception ex) {
424	<	fail("unexpected exception");
425	<	}
1429	>	lock2.hasWaiters(c);
1430	>	shouldThrow();
1431	>	} catch (IllegalArgumentException success) {}
1432		}
1433
1434	<	public void testAwaitUntil_Timeout() {
1435	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1434	>	/**
1435	>	* hasWaiters throws IllegalMonitorStateException if not locked
1436	>	*/
1437	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1438	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1439	>	public void testHasWaitersIMSE(boolean fair) {
1440	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1441		final Condition c = lock.writeLock().newCondition();
1442		try {
1443	<	lock.writeLock().lock();
1444	<	java.util.Date d = new java.util.Date();
1445	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
435	<	lock.writeLock().unlock();
436	<	}
437	<	catch (Exception ex) {
438	<	fail("unexpected exception");
439	<	}
1443	>	lock.hasWaiters(c);
1444	>	shouldThrow();
1445	>	} catch (IllegalMonitorStateException success) {}
1446		}
1447
1448	<	public void testAwait() {
1449	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1448	>	/**
1449	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1450	>	*/
1451	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1452	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1453	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1454	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1455		final Condition c = lock.writeLock().newCondition();
1456	<	Thread t = new Thread(new Runnable() {
1457	<	public void run() {
1458	<	try {
1459	<	lock.writeLock().lock();
1460	<	c.await();
1461	<	lock.writeLock().unlock();
451	<	}
452	<	catch(InterruptedException e) {
453	<	threadFail("unexpected exception");
454	<	}
455	<	}
456	<	});
1456	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1457	>	try {
1458	>	lock2.getWaitQueueLength(c);
1459	>	shouldThrow();
1460	>	} catch (IllegalArgumentException success) {}
1461	>	}
1462
1463	+	/**
1464	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1465	+	*/
1466	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1467	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1468	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
1469	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1470	+	final Condition c = lock.writeLock().newCondition();
1471		try {
1472	<	t.start();
1473	<	Thread.sleep(SHORT_DELAY_MS);
1474	<	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	<	}
1472	>	lock.getWaitQueueLength(c);
1473	>	shouldThrow();
1474	>	} catch (IllegalMonitorStateException success) {}
1475		}
1476
1477	<	public void testAwaitUninterruptibly() {
1478	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1477	>	/**
1478	>	* getWaitingThreads throws IllegalArgumentException if not owned
1479	>	*/
1480	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1481	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1482	>	public void testGetWaitingThreadsIAE(boolean fair) {
1483	>	final PublicReentrantReadWriteLock lock =
1484	>	new PublicReentrantReadWriteLock(fair);
1485		final Condition c = lock.writeLock().newCondition();
1486	<	Thread t = new Thread(new Runnable() {
1487	<	public void run() {
1488	<	lock.writeLock().lock();
1489	<	c.awaitUninterruptibly();
1490	<	lock.writeLock().unlock();
1491	<	}
1492	<	});
1486	>	final PublicReentrantReadWriteLock lock2 =
1487	>	new PublicReentrantReadWriteLock(fair);
1488	>	try {
1489	>	lock2.getWaitingThreads(c);
1490	>	shouldThrow();
1491	>	} catch (IllegalArgumentException success) {}
1492	>	}
1493
1494	+	/**
1495	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
1496	+	*/
1497	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1498	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1499	+	public void testGetWaitingThreadsIMSE(boolean fair) {
1500	+	final PublicReentrantReadWriteLock lock =
1501	+	new PublicReentrantReadWriteLock(fair);
1502	+	final Condition c = lock.writeLock().newCondition();
1503		try {
1504	<	t.start();
1505	<	Thread.sleep(SHORT_DELAY_MS);
1506	<	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	<	}
1504	>	lock.getWaitingThreads(c);
1505	>	shouldThrow();
1506	>	} catch (IllegalMonitorStateException success) {}
1507		}
1508
1509	<	public void testAwait_Interrupt() {
1510	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1511	<	final Condition c = lock.writeLock().newCondition();
1512	<	Thread t = new Thread(new Runnable() {
1513	<	public void run() {
1514	<	try {
1515	<	lock.writeLock().lock();
1516	<	c.await();
1517	<	lock.writeLock().unlock();
1518	<	threadFail("should throw");
1519	<	}
1520	<	catch(InterruptedException success) {
1521	<	}
1522	<	}
1523	<	});
1524	<
1525	<	try {
1526	<	t.start();
1527	<	Thread.sleep(SHORT_DELAY_MS);
1528	<	t.interrupt();
1529	<	t.join(SHORT_DELAY_MS);
1530	<	assertFalse(t.isAlive());
1531	<	}
1532	<	catch (Exception ex) {
1533	<	fail("unexpected exception");
1534	<	}
1535	<	}
1536	<
1537	<	public void testAwaitNanos_Interrupt() {
1538	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1539	<	final Condition c = lock.writeLock().newCondition();
1540	<	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	<	}
1509	>	/**
1510	>	* hasWaiters returns true when a thread is waiting, else false
1511	>	*/
1512	>	public void testHasWaiters()      { testHasWaiters(false); }
1513	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1514	>	public void testHasWaiters(boolean fair) {
1515	>	final PublicReentrantReadWriteLock lock =
1516	>	new PublicReentrantReadWriteLock(fair);
1517	>	final Condition c = lock.writeLock().newCondition();
1518	>	final CountDownLatch locked = new CountDownLatch(1);
1519	>	Thread t = newStartedThread(new CheckedRunnable() {
1520	>	public void realRun() throws InterruptedException {
1521	>	lock.writeLock().lock();
1522	>	assertHasNoWaiters(lock, c);
1523	>	assertFalse(lock.hasWaiters(c));
1524	>	locked.countDown();
1525	>	c.await();
1526	>	assertHasNoWaiters(lock, c);
1527	>	assertFalse(lock.hasWaiters(c));
1528	>	lock.writeLock().unlock();
1529	>	}});
1530	>
1531	>	await(locked);
1532	>	lock.writeLock().lock();
1533	>	assertHasWaiters(lock, c, t);
1534	>	assertTrue(lock.hasWaiters(c));
1535	>	c.signal();
1536	>	assertHasNoWaiters(lock, c);
1537	>	assertFalse(lock.hasWaiters(c));
1538	>	lock.writeLock().unlock();
1539	>	awaitTermination(t);
1540	>	assertHasNoWaiters(lock, c);
1541		}
1542
1543	<	public void testSerialization() {
1544	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1545	<	l.readLock().lock();
1546	<	l.readLock().unlock();
1547	<
1548	<	try {
1549	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1550	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1551	<	out.writeObject(l);
1552	<	out.close();
1553	<
1554	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1555	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1556	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1557	<	r.readLock().lock();
1558	<	r.readLock().unlock();
1559	<	} catch(Exception e){
1560	<	e.printStackTrace();
1561	<	fail("unexpected exception");
1562	<	}
1543	>	/**
1544	>	* getWaitQueueLength returns number of waiting threads
1545	>	*/
1546	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1547	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1548	>	public void testGetWaitQueueLength(boolean fair) {
1549	>	final PublicReentrantReadWriteLock lock =
1550	>	new PublicReentrantReadWriteLock(fair);
1551	>	final Condition c = lock.writeLock().newCondition();
1552	>	final CountDownLatch locked = new CountDownLatch(1);
1553	>	Thread t = newStartedThread(new CheckedRunnable() {
1554	>	public void realRun() throws InterruptedException {
1555	>	lock.writeLock().lock();
1556	>	assertEquals(0, lock.getWaitQueueLength(c));
1557	>	locked.countDown();
1558	>	c.await();
1559	>	lock.writeLock().unlock();
1560	>	}});
1561	>
1562	>	await(locked);
1563	>	lock.writeLock().lock();
1564	>	assertHasWaiters(lock, c, t);
1565	>	assertEquals(1, lock.getWaitQueueLength(c));
1566	>	c.signal();
1567	>	assertHasNoWaiters(lock, c);
1568	>	assertEquals(0, lock.getWaitQueueLength(c));
1569	>	lock.writeLock().unlock();
1570	>	awaitTermination(t);
1571	>	}
1572	>
1573	>	/**
1574	>	* getWaitingThreads returns only and all waiting threads
1575	>	*/
1576	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1577	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1578	>	public void testGetWaitingThreads(boolean fair) {
1579	>	final PublicReentrantReadWriteLock lock =
1580	>	new PublicReentrantReadWriteLock(fair);
1581	>	final Condition c = lock.writeLock().newCondition();
1582	>	final CountDownLatch locked1 = new CountDownLatch(1);
1583	>	final CountDownLatch locked2 = new CountDownLatch(1);
1584	>	Thread t1 = new Thread(new CheckedRunnable() {
1585	>	public void realRun() throws InterruptedException {
1586	>	lock.writeLock().lock();
1587	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1588	>	locked1.countDown();
1589	>	c.await();
1590	>	lock.writeLock().unlock();
1591	>	}});
1592	>
1593	>	Thread t2 = new Thread(new CheckedRunnable() {
1594	>	public void realRun() throws InterruptedException {
1595	>	lock.writeLock().lock();
1596	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1597	>	locked2.countDown();
1598	>	c.await();
1599	>	lock.writeLock().unlock();
1600	>	}});
1601	>
1602	>	lock.writeLock().lock();
1603	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1604	>	lock.writeLock().unlock();
1605	>
1606	>	t1.start();
1607	>	await(locked1);
1608	>	t2.start();
1609	>	await(locked2);
1610	>
1611	>	lock.writeLock().lock();
1612	>	assertTrue(lock.hasWaiters(c));
1613	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1614	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1615	>	assertEquals(2, lock.getWaitingThreads(c).size());
1616	>	c.signalAll();
1617	>	assertHasNoWaiters(lock, c);
1618	>	lock.writeLock().unlock();
1619	>
1620	>	awaitTermination(t1);
1621	>	awaitTermination(t2);
1622	>
1623	>	assertHasNoWaiters(lock, c);
1624		}
1625
1626	+	/**
1627	+	* toString indicates current lock state
1628	+	*/
1629	+	public void testToString()      { testToString(false); }
1630	+	public void testToString_fair() { testToString(true); }
1631	+	public void testToString(boolean fair) {
1632	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1633	+	assertTrue(lock.toString().contains("Write locks = 0"));
1634	+	assertTrue(lock.toString().contains("Read locks = 0"));
1635	+	lock.writeLock().lock();
1636	+	assertTrue(lock.toString().contains("Write locks = 1"));
1637	+	assertTrue(lock.toString().contains("Read locks = 0"));
1638	+	lock.writeLock().lock();
1639	+	assertTrue(lock.toString().contains("Write locks = 2"));
1640	+	assertTrue(lock.toString().contains("Read locks = 0"));
1641	+	lock.writeLock().unlock();
1642	+	lock.writeLock().unlock();
1643	+	lock.readLock().lock();
1644	+	assertTrue(lock.toString().contains("Write locks = 0"));
1645	+	assertTrue(lock.toString().contains("Read locks = 1"));
1646	+	lock.readLock().lock();
1647	+	assertTrue(lock.toString().contains("Write locks = 0"));
1648	+	assertTrue(lock.toString().contains("Read locks = 2"));
1649	+	}
1650	+
1651	+	/**
1652	+	* readLock.toString indicates current lock state
1653	+	*/
1654	+	public void testReadLockToString()      { testReadLockToString(false); }
1655	+	public void testReadLockToString_fair() { testReadLockToString(true); }
1656	+	public void testReadLockToString(boolean fair) {
1657	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1658	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1659	+	lock.readLock().lock();
1660	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1661	+	lock.readLock().lock();
1662	+	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1663	+	lock.readLock().unlock();
1664	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1665	+	lock.readLock().unlock();
1666	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1667	+	}
1668	+
1669	+	/**
1670	+	* writeLock.toString indicates current lock state
1671	+	*/
1672	+	public void testWriteLockToString()      { testWriteLockToString(false); }
1673	+	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1674	+	public void testWriteLockToString(boolean fair) {
1675	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1676	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1677	+	lock.writeLock().lock();
1678	+	assertTrue(lock.writeLock().toString().contains("Locked by"));
1679	+	lock.writeLock().unlock();
1680	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1681	+	}
1682
1683		}

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