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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.60 by jsr166, Mon May 9 20:00:19 2011 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.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15	+	import java.util.*;
16
17	<	public class ReentrantReadWriteLockTest extends TestCase {
14	<	static int HOLD_COUNT_TEST_LIMIT = 20;
15	<
17	>	public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
19	–
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25	+	/**
26	+	* A runnable calling lockInterruptibly
27	+	*/
28	+	class InterruptibleLockRunnable extends CheckedRunnable {
29	+	final ReentrantReadWriteLock lock;
30	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	+	public void realRun() throws InterruptedException {
32	+	lock.writeLock().lockInterruptibly();
33	+	}
34	+	}
35	+
36	+	/**
37	+	* A runnable calling lockInterruptibly that expects to be
38	+	* interrupted
39	+	*/
40	+	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	+	final ReentrantReadWriteLock lock;
42	+	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	+	public void realRun() throws InterruptedException {
44	+	lock.writeLock().lockInterruptibly();
45	+	}
46	+	}
47
48	<	private static long SHORT_DELAY_MS = 100;
49	<	private static long MEDIUM_DELAY_MS = 1000;
50	<	private static long LONG_DELAY_MS = 10000;
48	>	/**
49	>	* Subclass to expose protected methods
50	>	*/
51	>	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52	>	PublicReentrantReadWriteLock() { super(); }
53	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56	>	}
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>	}
64	>
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67	>	*/
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedBy(lock, Thread.currentThread());
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74	>	}
75
76	<	/*
77	<	* Unlocks an unlocked lock, throws Illegal Monitor State
31	<	*
76	>	/**
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<
80	<	public void testIllegalMonitorStateException(){
81	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
82	<	try{
83	<	rl.writeLock().unlock();
84	<	fail("Should of thown Illegal Monitor State Exception");
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new AssertionError("timed out");
84	>	Thread.yield();
85	>	}
86	>	assertTrue(t.isAlive());
87	>	assertTrue(lock.getOwner() != t);
88	>	}
89
90	<	}catch(IllegalMonitorStateException success){}
90	>	/**
91	>	* Checks that lock is not write-locked.
92	>	*/
93	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	>	assertFalse(lock.isWriteLocked());
95	>	assertFalse(lock.isWriteLockedByCurrentThread());
96	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	>	assertNull(lock.getOwner());
98	>	assertEquals(0, lock.getWriteHoldCount());
99		}
100
101	+	/**
102	+	* Checks that lock is write-locked by the given thread.
103	+	*/
104	+	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
105	+	assertTrue(lock.isWriteLocked());
106	+	assertSame(t, lock.getOwner());
107	+	assertEquals(t == Thread.currentThread(),
108	+	lock.isWriteLockedByCurrentThread());
109	+	assertEquals(t == Thread.currentThread(),
110	+	lock.writeLock().isHeldByCurrentThread());
111	+	assertEquals(t == Thread.currentThread(),
112	+	lock.getWriteHoldCount() > 0);
113	+	assertEquals(0, lock.getReadLockCount());
114	+	}
115
116	+	/**
117	+	* Checks that condition c has no waiters.
118	+	*/
119	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	+	assertHasWaiters(lock, c, new Thread[] {});
121	+	}
122
123	<	public void testInterruptedException(){
124	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
125	<	lock.writeLock().lock();
126	<	Thread t = new Thread(new Runnable() {
127	<	public void run(){
128	<	try{
129	<	lock.writeLock().lockInterruptibly();
130	<	fail("should throw");
131	<	}catch(InterruptedException success){}
132	<	}
133	<	});
134	<	try {
135	<	t.start();
58	<	t.interrupt();
59	<	lock.writeLock().unlock();
60	<	t.join();
61	<	} catch(Exception e){
62	<	fail("unexpected exception");
63	<	}
64	<	}
65	<
66	<	public void testInterruptedException2(){
67	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
68	<	lock.writeLock().lock();
69	<	Thread t = new Thread(new Runnable() {
70	<	public void run(){
71	<	try{
72	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
73	<	fail("should throw");
74	<	}catch(InterruptedException success){}
75	<	}
76	<	});
77	<	try {
78	<	t.start();
79	<	t.interrupt();
80	<	lock.writeLock().unlock();
81	<	t.join();
82	<	} catch(Exception e){
83	<	fail("unexpected exception");
84	<	}
123	>	/**
124	>	* Checks that condition c has exactly the given waiter threads.
125	>	*/
126	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
127	>	Thread... threads) {
128	>	lock.writeLock().lock();
129	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
130	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
131	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
132	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
133	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
134	>	new HashSet<Thread>(Arrays.asList(threads)));
135	>	lock.writeLock().unlock();
136		}
137
138	<	public void testInterruptedException3(){
139	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
140	<	lock.writeLock().lock();
141	<	Thread t = new Thread(new Runnable() {
142	<	public void run(){
143	<	try{
144	<	lock.readLock().lockInterruptibly();
145	<	fail("should throw");
146	<	}catch(InterruptedException success){}
147	<	}
148	<	});
149	<	try {
150	<	t.start();
151	<	t.interrupt();
152	<	lock.writeLock().unlock();
153	<	t.join();
154	<	} catch(Exception e){
155	<	fail("unexpected exception");
156	<	}
106	<	}
107	<
108	<	public void testInterruptedException4(){
109	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
110	<	lock.writeLock().lock();
111	<	Thread t = new Thread(new Runnable() {
112	<	public void run(){
113	<	try{
114	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
115	<	fail("should throw");
116	<	}catch(InterruptedException success){}
117	<	}
118	<	});
119	<	try {
120	<	t.start();
121	<	t.interrupt();
122	<	t.join();
123	<	} catch(Exception e){
124	<	fail("unexpected exception");
138	>	enum AwaitMethod { await, awaitNanos, awaitUntil };
139	>
140	>	/**
141	>	* Awaits condition using the specified AwaitMethod
142	>	*/
143	>	void await(Condition c, AwaitMethod awaitMethod)
144	>	throws InterruptedException {
145	>	switch (awaitMethod) {
146	>	case await:
147	>	c.await();
148	>	break;
149	>	case awaitNanos:
150	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
151	>	assertTrue(nanosRemaining > 0);
152	>	break;
153	>	case awaitUntil:
154	>	java.util.Date d = new java.util.Date();
155	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
156	>	break;
157		}
158		}
159
160	<
161	<	public void testTryLockWhenLocked() {
162	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
163	<	lock.writeLock().lock();
164	<	Thread t = new Thread(new Runnable() {
165	<	public void run(){
166	<	assertFalse(lock.writeLock().tryLock());
167	<	}
168	<	});
169	<	try {
170	<	t.start();
171	<	t.join();
160	>	/**
161	>	* Constructor sets given fairness, and is in unlocked state
162	>	*/
163	>	public void testConstructor() {
164	>	PublicReentrantReadWriteLock lock;
165	>
166	>	lock = new PublicReentrantReadWriteLock();
167	>	assertFalse(lock.isFair());
168	>	assertNotWriteLocked(lock);
169	>	assertEquals(0, lock.getReadLockCount());
170	>
171	>	lock = new PublicReentrantReadWriteLock(true);
172	>	assertTrue(lock.isFair());
173	>	assertNotWriteLocked(lock);
174	>	assertEquals(0, lock.getReadLockCount());
175	>
176	>	lock = new PublicReentrantReadWriteLock(false);
177	>	assertFalse(lock.isFair());
178	>	assertNotWriteLocked(lock);
179	>	assertEquals(0, lock.getReadLockCount());
180	>	}
181	>
182	>	/**
183	>	* write-locking and read-locking an unlocked lock succeed
184	>	*/
185	>	public void testLock()      { testLock(false); }
186	>	public void testLock_fair() { testLock(true); }
187	>	public void testLock(boolean fair) {
188	>	PublicReentrantReadWriteLock lock =
189	>	new PublicReentrantReadWriteLock(fair);
190	>	assertNotWriteLocked(lock);
191	>	lock.writeLock().lock();
192	>	assertWriteLockedBy(lock, Thread.currentThread());
193	>	lock.writeLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196	>	lock.readLock().lock();
197	>	assertNotWriteLocked(lock);
198	>	assertEquals(1, lock.getReadLockCount());
199	>	lock.readLock().unlock();
200	>	assertNotWriteLocked(lock);
201	>	assertEquals(0, lock.getReadLockCount());
202	>	}
203	>
204	>	/**
205	>	* getWriteHoldCount returns number of recursive holds
206	>	*/
207	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
208	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
209	>	public void testGetWriteHoldCount(boolean fair) {
210	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
211	>	for (int i = 1; i <= SIZE; i++) {
212	>	lock.writeLock().lock();
213	>	assertEquals(i,lock.getWriteHoldCount());
214	>	}
215	>	for (int i = SIZE; i > 0; i--) {
216		lock.writeLock().unlock();
217	<	} catch(Exception e){
142	<	fail("unexpected exception");
217	>	assertEquals(i-1,lock.getWriteHoldCount());
218		}
219	<	}
219	>	}
220
221	<	public void testTryLockWhenLocked2() {
222	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
223	<	lock.writeLock().lock();
224	<	Thread t = new Thread(new Runnable() {
225	<	public void run(){
226	<	assertFalse(lock.readLock().tryLock());
227	<	}
228	<	});
229	<	try {
230	<	t.start();
231	<	t.join();
221	>	/**
222	>	* writelock.getHoldCount returns number of recursive holds
223	>	*/
224	>	public void testGetHoldCount()      { testGetHoldCount(false); }
225	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
226	>	public void testGetHoldCount(boolean fair) {
227	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
228	>	for (int i = 1; i <= SIZE; i++) {
229	>	lock.writeLock().lock();
230	>	assertEquals(i,lock.writeLock().getHoldCount());
231	>	}
232	>	for (int i = SIZE; i > 0; i--) {
233		lock.writeLock().unlock();
234	<	} catch(Exception e){
159	<	fail("unexpected exception");
234	>	assertEquals(i-1,lock.writeLock().getHoldCount());
235		}
236	<	}
236	>	}
237
238	<	public void testMultipleReadLocks() {
239	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
240	<	lock.readLock().lock();
241	<	Thread t = new Thread(new Runnable() {
242	<	public void run(){
243	<	assertTrue(lock.readLock().tryLock());
244	<	lock.readLock().unlock();
245	<	}
246	<	});
247	<	try {
248	<	t.start();
249	<	t.join();
238	>	/**
239	>	* getReadHoldCount returns number of recursive holds
240	>	*/
241	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
242	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
243	>	public void testGetReadHoldCount(boolean fair) {
244	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
245	>	for (int i = 1; i <= SIZE; i++) {
246	>	lock.readLock().lock();
247	>	assertEquals(i,lock.getReadHoldCount());
248	>	}
249	>	for (int i = SIZE; i > 0; i--) {
250		lock.readLock().unlock();
251	<	} catch(Exception e){
177	<	fail("unexpected exception");
251	>	assertEquals(i-1,lock.getReadHoldCount());
252		}
253	<	}
180	<
181	<	public void testWriteAfterMultipleReadLocks() {
182	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
183	<	lock.readLock().lock();
184	<	Thread t1 = new Thread(new Runnable() {
185	<	public void run(){
186	<	lock.readLock().lock();
187	<	lock.readLock().unlock();
188	<	}
189	<	});
190	<	Thread t2 = new Thread(new Runnable() {
191	<	public void run(){
192	<	lock.writeLock().lock();
193	<	lock.writeLock().unlock();
194	<	}
195	<	});
253	>	}
254
255	+	/**
256	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
257	+	*/
258	+	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
259	+	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
260	+	public void testWriteUnlock_IMSE(boolean fair) {
261	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
262		try {
198	–	t1.start();
199	–	t2.start();
200	–	Thread.sleep(SHORT_DELAY_MS);
201	–	lock.readLock().unlock();
202	–	t1.join(MEDIUM_DELAY_MS);
203	–	t2.join(MEDIUM_DELAY_MS);
204	–	assertTrue(!t1.isAlive());
205	–	assertTrue(!t2.isAlive());
206	–
207	–	} catch(Exception e){
208	–	fail("unexpected exception");
209	–	}
210	–	}
211	–
212	–	public void testReadAfterWriteLock() {
213	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
214	–	lock.writeLock().lock();
215	–	Thread t1 = new Thread(new Runnable() {
216	–	public void run(){
217	–	lock.readLock().lock();
218	–	lock.readLock().unlock();
219	–	}
220	–	});
221	–	Thread t2 = new Thread(new Runnable() {
222	–	public void run(){
223	–	lock.readLock().lock();
224	–	lock.readLock().unlock();
225	–	}
226	–	});
227	–
228	–	try {
229	–	t1.start();
230	–	t2.start();
231	–	Thread.sleep(SHORT_DELAY_MS);
263		lock.writeLock().unlock();
264	<	t1.join(MEDIUM_DELAY_MS);
265	<	t2.join(MEDIUM_DELAY_MS);
266	<	assertTrue(!t1.isAlive());
267	<	assertTrue(!t2.isAlive());
268	<
269	<	} catch(Exception e){
270	<	fail("unexpected exception");
271	<	}
272	<	}
273	<
274	<
244	<	public void testTryLockWhenReadLocked() {
245	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
246	<	lock.readLock().lock();
247	<	Thread t = new Thread(new Runnable() {
248	<	public void run(){
249	<	assertTrue(lock.readLock().tryLock());
250	<	lock.readLock().unlock();
251	<	}
252	<	});
264	>	shouldThrow();
265	>	} catch (IllegalMonitorStateException success) {}
266	>	}
267	>
268	>	/**
269	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
270	>	*/
271	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
272	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
273	>	public void testReadUnlock_IMSE(boolean fair) {
274	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
275		try {
254	–	t.start();
255	–	t.join();
276		lock.readLock().unlock();
277	<	} catch(Exception e){
278	<	fail("unexpected exception");
279	<	}
280	<	}
277	>	shouldThrow();
278	>	} catch (IllegalMonitorStateException success) {}
279	>	}
280	>
281	>	/**
282	>	* write-lockInterruptibly is interruptible
283	>	*/
284	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
285	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
286	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
287	>	final PublicReentrantReadWriteLock lock =
288	>	new PublicReentrantReadWriteLock(fair);
289	>	lock.writeLock().lock();
290	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
291	>	public void realRun() throws InterruptedException {
292	>	lock.writeLock().lockInterruptibly();
293	>	}});
294	>
295	>	waitForQueuedThread(lock, t);
296	>	t.interrupt();
297	>	awaitTermination(t);
298	>	releaseWriteLock(lock);
299	>	}
300
301	<
301	>	/**
302	>	* timed write-tryLock is interruptible
303	>	*/
304	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
305	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
306	>	public void testWriteTryLock_Interruptible(boolean fair) {
307	>	final PublicReentrantReadWriteLock lock =
308	>	new PublicReentrantReadWriteLock(fair);
309	>	lock.writeLock().lock();
310	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311	>	public void realRun() throws InterruptedException {
312	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
313	>	}});
314	>
315	>	waitForQueuedThread(lock, t);
316	>	t.interrupt();
317	>	awaitTermination(t);
318	>	releaseWriteLock(lock);
319	>	}
320
321	<	public void testWriteTryLockWhenReadLocked() {
322	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
323	<	lock.readLock().lock();
324	<	Thread t = new Thread(new Runnable() {
325	<	public void run(){
326	<	assertFalse(lock.writeLock().tryLock());
327	<	}
328	<	});
329	<	try {
330	<	t.start();
331	<	t.join();
332	<	lock.readLock().unlock();
333	<	} catch(Exception e){
334	<	fail("unexpected exception");
335	<	}
336	<	}
321	>	/**
322	>	* read-lockInterruptibly is interruptible
323	>	*/
324	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
325	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
326	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
327	>	final PublicReentrantReadWriteLock lock =
328	>	new PublicReentrantReadWriteLock(fair);
329	>	lock.writeLock().lock();
330	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
331	>	public void realRun() throws InterruptedException {
332	>	lock.readLock().lockInterruptibly();
333	>	}});
334	>
335	>	waitForQueuedThread(lock, t);
336	>	t.interrupt();
337	>	awaitTermination(t);
338	>	releaseWriteLock(lock);
339	>	}
340
341	<
341	>	/**
342	>	* timed read-tryLock is interruptible
343	>	*/
344	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
345	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
346	>	public void testReadTryLock_Interruptible(boolean fair) {
347	>	final PublicReentrantReadWriteLock lock =
348	>	new PublicReentrantReadWriteLock(fair);
349	>	lock.writeLock().lock();
350	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
351	>	public void realRun() throws InterruptedException {
352	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
353	>	}});
354	>
355	>	waitForQueuedThread(lock, t);
356	>	t.interrupt();
357	>	awaitTermination(t);
358	>	releaseWriteLock(lock);
359	>	}
360
361	<	public void testTryLock_Timeout(){
362	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
363	<	lock.writeLock().lock();
364	<	Thread t = new Thread(new Runnable() {
365	<	public void run(){
366	<	try {
367	<	assertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
368	<	} catch (Exception ex) {
369	<	fail("unexpected exception");
370	<	}
371	<	}
372	<	});
373	<	try {
296	<	t.start();
297	<	t.join();
298	<	lock.writeLock().unlock();
299	<	} catch(Exception e){
300	<	fail("unexpected exception");
301	<	}
302	<	}
361	>	/**
362	>	* write-tryLock fails if locked
363	>	*/
364	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
365	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
366	>	public void testWriteTryLockWhenLocked(boolean fair) {
367	>	final PublicReentrantReadWriteLock lock =
368	>	new PublicReentrantReadWriteLock(fair);
369	>	lock.writeLock().lock();
370	>	Thread t = newStartedThread(new CheckedRunnable() {
371	>	public void realRun() {
372	>	assertFalse(lock.writeLock().tryLock());
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	<	assertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
382	<	} catch (Exception ex) {
383	<	fail("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	>	awaitTermination(t);
376	>	releaseWriteLock(lock);
377	>	}
378	>
379	>	/**
380	>	* read-tryLock fails if locked
381	>	*/
382	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
383	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
384	>	public void testReadTryLockWhenLocked(boolean fair) {
385	>	final PublicReentrantReadWriteLock lock =
386	>	new PublicReentrantReadWriteLock(fair);
387	>	lock.writeLock().lock();
388	>	Thread t = newStartedThread(new CheckedRunnable() {
389	>	public void realRun() {
390	>	assertFalse(lock.readLock().tryLock());
391	>	}});
392	>
393	>	awaitTermination(t);
394	>	releaseWriteLock(lock);
395	>	}
396	>
397	>	/**
398	>	* Multiple threads can hold a read lock when not write-locked
399	>	*/
400	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
401	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
402	>	public void testMultipleReadLocks(boolean fair) {
403	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
404	>	lock.readLock().lock();
405	>	Thread t = newStartedThread(new CheckedRunnable() {
406	>	public void realRun() throws InterruptedException {
407	>	assertTrue(lock.readLock().tryLock());
408	>	lock.readLock().unlock();
409	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
410	>	lock.readLock().unlock();
411	>	lock.readLock().lock();
412	>	lock.readLock().unlock();
413	>	}});
414	>
415	>	awaitTermination(t);
416	>	lock.readLock().unlock();
417	>	}
418	>
419	>	/**
420	>	* A writelock succeeds only after a reading thread unlocks
421	>	*/
422	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
423	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
424	>	public void testWriteAfterReadLock(boolean fair) {
425	>	final PublicReentrantReadWriteLock lock =
426	>	new PublicReentrantReadWriteLock(fair);
427	>	lock.readLock().lock();
428	>	Thread t = newStartedThread(new CheckedRunnable() {
429	>	public void realRun() {
430	>	assertEquals(1, lock.getReadLockCount());
431	>	lock.writeLock().lock();
432	>	assertEquals(0, lock.getReadLockCount());
433	>	lock.writeLock().unlock();
434	>	}});
435	>	waitForQueuedThread(lock, t);
436	>	assertNotWriteLocked(lock);
437	>	assertEquals(1, lock.getReadLockCount());
438	>	lock.readLock().unlock();
439	>	assertEquals(0, lock.getReadLockCount());
440	>	awaitTermination(t);
441	>	assertNotWriteLocked(lock);
442	>	}
443	>
444	>	/**
445	>	* A writelock succeeds only after reading threads unlock
446	>	*/
447	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
448	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
449	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
450	>	final PublicReentrantReadWriteLock lock =
451	>	new PublicReentrantReadWriteLock(fair);
452	>	lock.readLock().lock();
453	>	lock.readLock().lock();
454	>	Thread t1 = newStartedThread(new CheckedRunnable() {
455	>	public void realRun() {
456	>	lock.readLock().lock();
457	>	assertEquals(3, lock.getReadLockCount());
458	>	lock.readLock().unlock();
459	>	}});
460	>	awaitTermination(t1);
461	>
462	>	Thread t2 = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() {
464	>	assertEquals(2, lock.getReadLockCount());
465	>	lock.writeLock().lock();
466	>	assertEquals(0, lock.getReadLockCount());
467	>	lock.writeLock().unlock();
468	>	}});
469	>	waitForQueuedThread(lock, t2);
470	>	assertNotWriteLocked(lock);
471	>	assertEquals(2, lock.getReadLockCount());
472	>	lock.readLock().unlock();
473	>	lock.readLock().unlock();
474	>	assertEquals(0, lock.getReadLockCount());
475	>	awaitTermination(t2);
476	>	assertNotWriteLocked(lock);
477	>	}
478	>
479	>	/**
480	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
481	>	* will block if there is a waiting writer thread.
482	>	*/
483	>	public void testReaderWriterReaderFairFifo() {
484	>	final PublicReentrantReadWriteLock lock =
485	>	new PublicReentrantReadWriteLock(true);
486	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
487	>
488	>	lock.readLock().lock();
489	>	Thread t1 = newStartedThread(new CheckedRunnable() {
490	>	public void realRun() {
491	>	assertEquals(1, lock.getReadLockCount());
492	>	lock.writeLock().lock();
493	>	assertEquals(0, lock.getReadLockCount());
494	>	t1GotLock.set(true);
495	>	lock.writeLock().unlock();
496	>	}});
497	>	waitForQueuedThread(lock, t1);
498	>
499	>	Thread t2 = newStartedThread(new CheckedRunnable() {
500	>	public void realRun() {
501	>	assertEquals(1, lock.getReadLockCount());
502	>	lock.readLock().lock();
503	>	assertEquals(1, lock.getReadLockCount());
504	>	assertTrue(t1GotLock.get());
505	>	lock.readLock().unlock();
506	>	}});
507	>	waitForQueuedThread(lock, t2);
508	>	assertTrue(t1.isAlive());
509	>	assertNotWriteLocked(lock);
510	>	assertEquals(1, lock.getReadLockCount());
511	>	lock.readLock().unlock();
512	>	awaitTermination(t1);
513	>	awaitTermination(t2);
514	>	assertNotWriteLocked(lock);
515	>	}
516	>
517	>	/**
518	>	* Readlocks succeed only after a writing thread unlocks
519	>	*/
520	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
521	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
522	>	public void testReadAfterWriteLock(boolean fair) {
523	>	final PublicReentrantReadWriteLock lock =
524	>	new PublicReentrantReadWriteLock(fair);
525	>	lock.writeLock().lock();
526	>	Thread t1 = newStartedThread(new CheckedRunnable() {
527	>	public void realRun() {
528	>	lock.readLock().lock();
529	>	lock.readLock().unlock();
530	>	}});
531	>	Thread t2 = newStartedThread(new CheckedRunnable() {
532	>	public void realRun() {
533	>	lock.readLock().lock();
534	>	lock.readLock().unlock();
535	>	}});
536	>
537	>	waitForQueuedThread(lock, t1);
538	>	waitForQueuedThread(lock, t2);
539	>	releaseWriteLock(lock);
540	>	awaitTermination(t1);
541	>	awaitTermination(t2);
542	>	}
543	>
544	>	/**
545	>	* Read trylock succeeds if write locked by current thread
546	>	*/
547	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
548	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
549	>	public void testReadHoldingWriteLock(boolean fair) {
550	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
551	>	lock.writeLock().lock();
552	>	assertTrue(lock.readLock().tryLock());
553	>	lock.readLock().unlock();
554	>	lock.writeLock().unlock();
555	>	}
556	>
557	>	/**
558	>	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
559	>	*/
560	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
561	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
562	>	public void testReadTryLockBarging(boolean fair) {
563	>	final PublicReentrantReadWriteLock lock =
564	>	new PublicReentrantReadWriteLock(fair);
565	>	lock.readLock().lock();
566	>
567	>	Thread t1 = newStartedThread(new CheckedRunnable() {
568	>	public void realRun() {
569	>	lock.writeLock().lock();
570	>	lock.writeLock().unlock();
571	>	}});
572	>
573	>	waitForQueuedThread(lock, t1);
574	>
575	>	Thread t2 = newStartedThread(new CheckedRunnable() {
576	>	public void realRun() {
577	>	lock.readLock().lock();
578	>	lock.readLock().unlock();
579	>	}});
580	>
581	>	if (fair)
582	>	waitForQueuedThread(lock, t2);
583	>
584	>	Thread t3 = newStartedThread(new CheckedRunnable() {
585	>	public void realRun() {
586	>	lock.readLock().tryLock();
587	>	lock.readLock().unlock();
588	>	}});
589	>
590	>	assertTrue(lock.getReadLockCount() > 0);
591	>	awaitTermination(t3);
592	>	assertTrue(t1.isAlive());
593	>	if (fair) assertTrue(t2.isAlive());
594	>	lock.readLock().unlock();
595	>	awaitTermination(t1);
596	>	awaitTermination(t2);
597	>	}
598	>
599	>	/**
600	>	* Read lock succeeds if write locked by current thread even if
601	>	* other threads are waiting for readlock
602	>	*/
603	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
604	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
605	>	public void testReadHoldingWriteLock2(boolean fair) {
606	>	final PublicReentrantReadWriteLock lock =
607	>	new PublicReentrantReadWriteLock(fair);
608	>	lock.writeLock().lock();
609	>	lock.readLock().lock();
610	>	lock.readLock().unlock();
611	>
612	>	Thread t1 = newStartedThread(new CheckedRunnable() {
613	>	public void realRun() {
614	>	lock.readLock().lock();
615	>	lock.readLock().unlock();
616	>	}});
617	>	Thread t2 = newStartedThread(new CheckedRunnable() {
618	>	public void realRun() {
619	>	lock.readLock().lock();
620	>	lock.readLock().unlock();
621	>	}});
622	>
623	>	waitForQueuedThread(lock, t1);
624	>	waitForQueuedThread(lock, t2);
625	>	assertWriteLockedBy(lock, Thread.currentThread());
626	>	lock.readLock().lock();
627	>	lock.readLock().unlock();
628	>	releaseWriteLock(lock);
629	>	awaitTermination(t1);
630	>	awaitTermination(t2);
631	>	}
632	>
633	>	/**
634	>	* Read lock succeeds if write locked by current thread even if
635	>	* other threads are waiting for writelock
636	>	*/
637	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
638	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
639	>	public void testReadHoldingWriteLock3(boolean fair) {
640	>	final PublicReentrantReadWriteLock lock =
641	>	new PublicReentrantReadWriteLock(fair);
642	>	lock.writeLock().lock();
643	>	lock.readLock().lock();
644	>	lock.readLock().unlock();
645	>
646	>	Thread t1 = newStartedThread(new CheckedRunnable() {
647	>	public void realRun() {
648	>	lock.writeLock().lock();
649	>	lock.writeLock().unlock();
650	>	}});
651	>	Thread t2 = newStartedThread(new CheckedRunnable() {
652	>	public void realRun() {
653	>	lock.writeLock().lock();
654	>	lock.writeLock().unlock();
655	>	}});
656	>
657	>	waitForQueuedThread(lock, t1);
658	>	waitForQueuedThread(lock, t2);
659	>	assertWriteLockedBy(lock, Thread.currentThread());
660	>	lock.readLock().lock();
661	>	lock.readLock().unlock();
662	>	assertWriteLockedBy(lock, Thread.currentThread());
663	>	lock.writeLock().unlock();
664	>	awaitTermination(t1);
665	>	awaitTermination(t2);
666	>	}
667	>
668	>	/**
669	>	* Write lock succeeds if write locked by current thread even if
670	>	* other threads are waiting for writelock
671	>	*/
672	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
673	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
674	>	public void testWriteHoldingWriteLock4(boolean fair) {
675	>	final PublicReentrantReadWriteLock lock =
676	>	new PublicReentrantReadWriteLock(fair);
677	>	lock.writeLock().lock();
678	>	lock.writeLock().lock();
679	>	lock.writeLock().unlock();
680	>
681	>	Thread t1 = newStartedThread(new CheckedRunnable() {
682	>	public void realRun() {
683	>	lock.writeLock().lock();
684	>	lock.writeLock().unlock();
685	>	}});
686	>	Thread t2 = newStartedThread(new CheckedRunnable() {
687	>	public void realRun() {
688	>	lock.writeLock().lock();
689	>	lock.writeLock().unlock();
690	>	}});
691	>
692	>	waitForQueuedThread(lock, t1);
693	>	waitForQueuedThread(lock, t2);
694	>	assertWriteLockedBy(lock, Thread.currentThread());
695	>	assertEquals(1, lock.getWriteHoldCount());
696	>	lock.writeLock().lock();
697	>	assertWriteLockedBy(lock, Thread.currentThread());
698	>	assertEquals(2, lock.getWriteHoldCount());
699	>	lock.writeLock().unlock();
700	>	assertWriteLockedBy(lock, Thread.currentThread());
701	>	assertEquals(1, lock.getWriteHoldCount());
702	>	lock.writeLock().unlock();
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705	>	}
706
707	+	/**
708	+	* Read tryLock succeeds if readlocked but not writelocked
709	+	*/
710	+	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
711	+	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
712	+	public void testTryLockWhenReadLocked(boolean fair) {
713	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
714	+	lock.readLock().lock();
715	+	Thread t = newStartedThread(new CheckedRunnable() {
716	+	public void realRun() {
717	+	assertTrue(lock.readLock().tryLock());
718	+	lock.readLock().unlock();
719	+	}});
720	+
721	+	awaitTermination(t);
722	+	lock.readLock().unlock();
723	+	}
724	+
725	+	/**
726	+	* write tryLock fails when readlocked
727	+	*/
728	+	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
729	+	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
730	+	public void testWriteTryLockWhenReadLocked(boolean fair) {
731	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
732	+	lock.readLock().lock();
733	+	Thread t = newStartedThread(new CheckedRunnable() {
734	+	public void realRun() {
735	+	assertFalse(lock.writeLock().tryLock());
736	+	}});
737	+
738	+	awaitTermination(t);
739	+	lock.readLock().unlock();
740	+	}
741
742	<	public void testLockInterruptibly() {
743	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
744	<	try {
742	>	/**
743	>	* write timed tryLock times out if locked
744	>	*/
745	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
746	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
747	>	public void testWriteTryLock_Timeout(boolean fair) {
748	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
749	>	lock.writeLock().lock();
750	>	Thread t = newStartedThread(new CheckedRunnable() {
751	>	public void realRun() throws InterruptedException {
752	>	long startTime = System.nanoTime();
753	>	long timeoutMillis = 10;
754	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
755	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
756	>	}});
757	>
758	>	awaitTermination(t);
759	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
760	>	lock.writeLock().unlock();
761	>	}
762	>
763	>	/**
764	>	* read timed tryLock times out if write-locked
765	>	*/
766	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
767	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
768	>	public void testReadTryLock_Timeout(boolean fair) {
769	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
770	>	lock.writeLock().lock();
771	>	Thread t = newStartedThread(new CheckedRunnable() {
772	>	public void realRun() throws InterruptedException {
773	>	long startTime = System.nanoTime();
774	>	long timeoutMillis = 10;
775	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
776	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
777	>	}});
778	>
779	>	awaitTermination(t);
780	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
781	>	lock.writeLock().unlock();
782	>	}
783	>
784	>	/**
785	>	* write lockInterruptibly succeeds if lock free else is interruptible
786	>	*/
787	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
788	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
789	>	public void testWriteLockInterruptibly(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792	>	try {
793		lock.writeLock().lockInterruptibly();
794	<	} catch(Exception e) {
795	<	fail("unexpected exception");
332	<	}
333	<	Thread t = new Thread(new Runnable() {
334	<	public void run() {
335	<	try {
336	<	lock.writeLock().lockInterruptibly();
337	<	fail("should throw");
338	<	}
339	<	catch(InterruptedException success) {
340	<	}
341	<	}
342	<	});
343	<	try {
344	<	t.start();
345	<	t.interrupt();
346	<	t.join();
347	<	lock.writeLock().unlock();
348	<	} catch(Exception e){
349	<	fail("unexpected exception");
794	>	} catch (Throwable t) {
795	>	threadUnexpectedException(t);
796		}
797	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
798	+	public void realRun() throws InterruptedException {
799	+	lock.writeLock().lockInterruptibly();
800	+	}});
801	+
802	+	waitForQueuedThread(lock, t);
803	+	t.interrupt();
804	+	awaitTermination(t);
805	+	releaseWriteLock(lock);
806		}
807
808	<	public void testLockInterruptibly2() {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
810	<	try {
808	>	/**
809	>	* read lockInterruptibly succeeds if lock free else is interruptible
810	>	*/
811	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
812	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
813	>	public void testReadLockInterruptibly(boolean fair) {
814	>	final PublicReentrantReadWriteLock lock =
815	>	new PublicReentrantReadWriteLock(fair);
816	>	try {
817	>	lock.readLock().lockInterruptibly();
818	>	lock.readLock().unlock();
819		lock.writeLock().lockInterruptibly();
820	<	} catch(Exception e) {
821	<	fail("unexpected exception");
359	<	}
360	<	Thread t = new Thread(new Runnable() {
361	<	public void run() {
362	<	try {
363	<	lock.readLock().lockInterruptibly();
364	<	fail("should throw");
365	<	}
366	<	catch(InterruptedException success) {
367	<	}
368	<	}
369	<	});
370	<	try {
371	<	t.start();
372	<	t.interrupt();
373	<	t.join();
374	<	lock.writeLock().unlock();
375	<	} catch(Exception e){
376	<	fail("unexpected exception");
820	>	} catch (Throwable t) {
821	>	threadUnexpectedException(t);
822		}
823	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
824	+	public void realRun() throws InterruptedException {
825	+	lock.readLock().lockInterruptibly();
826	+	}});
827	+
828	+	waitForQueuedThread(lock, t);
829	+	t.interrupt();
830	+	awaitTermination(t);
831	+	releaseWriteLock(lock);
832		}
833
834	<	public void testAwait_IllegalMonitor() {
835	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
834	>	/**
835	>	* Calling await without holding lock throws IllegalMonitorStateException
836	>	*/
837	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
838	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
839	>	public void testAwait_IMSE(boolean fair) {
840	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
841		final Condition c = lock.writeLock().newCondition();
842	+	long startTime = System.nanoTime();
843		try {
844	<	c.await();
845	<	fail("should throw");
846	<	}
847	<	catch (IllegalMonitorStateException success) {
848	<	}
849	<	catch (Exception ex) {
850	<	fail("should throw IMSE");
844	>	try {
845	>	c.await();
846	>	shouldThrow();
847	>	} catch (IllegalMonitorStateException success) {}
848	>	try {
849	>	c.await(LONG_DELAY_MS, MILLISECONDS);
850	>	shouldThrow();
851	>	} catch (IllegalMonitorStateException success) {}
852	>	try {
853	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
854	>	shouldThrow();
855	>	} catch (IllegalMonitorStateException success) {}
856	>	try {
857	>	c.awaitUninterruptibly();
858	>	shouldThrow();
859	>	} catch (IllegalMonitorStateException success) {}
860	>	} catch (Throwable t) {
861	>	threadUnexpectedException(t);
862		}
863	+	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
864		}
865
866	<	public void testSignal_IllegalMonitor() {
867	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
866	>	/**
867	>	* Calling signal without holding lock throws IllegalMonitorStateException
868	>	*/
869	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
870	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
871	>	public void testSignal_IMSE(boolean fair) {
872	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
873		final Condition c = lock.writeLock().newCondition();
874		try {
875		c.signal();
876	<	fail("should throw");
877	<	}
401	<	catch (IllegalMonitorStateException success) {
402	<	}
403	<	catch (Exception ex) {
404	<	fail("should throw IMSE");
405	<	}
876	>	shouldThrow();
877	>	} catch (IllegalMonitorStateException success) {}
878		}
879
880	<	public void testAwaitNanos_Timeout() {
881	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
880	>	/**
881	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
882	>	*/
883	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
884	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
885	>	public void testSignalAll_IMSE(boolean fair) {
886	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
887		final Condition c = lock.writeLock().newCondition();
888		try {
889	+	c.signalAll();
890	+	shouldThrow();
891	+	} catch (IllegalMonitorStateException success) {}
892	+	}
893	+
894	+	/**
895	+	* awaitNanos without a signal times out
896	+	*/
897	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
898	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
899	+	public void testAwaitNanos_Timeout(boolean fair) {
900	+	try {
901	+	final ReentrantReadWriteLock lock =
902	+	new ReentrantReadWriteLock(fair);
903	+	final Condition c = lock.writeLock().newCondition();
904		lock.writeLock().lock();
905	<	long t = c.awaitNanos(100);
906	<	assertTrue(t <= 0);
905	>	long startTime = System.nanoTime();
906	>	long timeoutMillis = 10;
907	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
908	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
909	>	assertTrue(nanosRemaining <= 0);
910	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
911		lock.writeLock().unlock();
912	<	}
913	<	catch (Exception ex) {
418	<	fail("unexpected exception");
912	>	} catch (InterruptedException e) {
913	>	threadUnexpectedException(e);
914		}
915		}
916
917	<	public void testAwait_Timeout() {
918	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
919	<	final Condition c = lock.writeLock().newCondition();
920	<	try {
917	>	/**
918	>	* timed await without a signal times out
919	>	*/
920	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
921	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
922	>	public void testAwait_Timeout(boolean fair) {
923	>	try {
924	>	final ReentrantReadWriteLock lock =
925	>	new ReentrantReadWriteLock(fair);
926	>	final Condition c = lock.writeLock().newCondition();
927		lock.writeLock().lock();
928	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
928	>	long startTime = System.nanoTime();
929	>	long timeoutMillis = 10;
930	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
931	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
932		lock.writeLock().unlock();
933	<	}
934	<	catch (Exception ex) {
431	<	fail("unexpected exception");
933	>	} catch (InterruptedException e) {
934	>	threadUnexpectedException(e);
935		}
936		}
937
938	<	public void testAwaitUntil_Timeout() {
939	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
940	<	final Condition c = lock.writeLock().newCondition();
941	<	try {
938	>	/**
939	>	* awaitUntil without a signal times out
940	>	*/
941	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
942	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
943	>	public void testAwaitUntil_Timeout(boolean fair) {
944	>	try {
945	>	final ReentrantReadWriteLock lock =
946	>	new ReentrantReadWriteLock(fair);
947	>	final Condition c = lock.writeLock().newCondition();
948		lock.writeLock().lock();
949	+	long startTime = System.nanoTime();
950	+	long timeoutMillis = 10;
951		java.util.Date d = new java.util.Date();
952	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
952	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
953	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
954		lock.writeLock().unlock();
955	<	}
956	<	catch (Exception ex) {
445	<	fail("unexpected exception");
955	>	} catch (InterruptedException e) {
956	>	threadUnexpectedException(e);
957		}
958		}
959
960	<	public void testAwait() {
961	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
960	>	/**
961	>	* await returns when signalled
962	>	*/
963	>	public void testAwait()      { testAwait(false); }
964	>	public void testAwait_fair() { testAwait(true); }
965	>	public void testAwait(boolean fair) {
966	>	final PublicReentrantReadWriteLock lock =
967	>	new PublicReentrantReadWriteLock(fair);
968		final Condition c = lock.writeLock().newCondition();
969	<	Thread t = new Thread(new Runnable() {
970	<	public void run() {
971	<	try {
972	<	lock.writeLock().lock();
973	<	c.await();
974	<	lock.writeLock().unlock();
975	<	}
976	<	catch(InterruptedException e) {
977	<	fail("unexpected exception");
978	<	}
979	<	}
980	<	});
969	>	final CountDownLatch locked = new CountDownLatch(1);
970	>	Thread t = newStartedThread(new CheckedRunnable() {
971	>	public void realRun() throws InterruptedException {
972	>	lock.writeLock().lock();
973	>	locked.countDown();
974	>	c.await();
975	>	lock.writeLock().unlock();
976	>	}});
977	>
978	>	await(locked);
979	>	lock.writeLock().lock();
980	>	assertHasWaiters(lock, c, t);
981	>	c.signal();
982	>	assertHasNoWaiters(lock, c);
983	>	assertTrue(t.isAlive());
984	>	lock.writeLock().unlock();
985	>	awaitTermination(t);
986	>	}
987
988	<	try {
989	<	t.start();
990	<	Thread.sleep(SHORT_DELAY_MS);
991	<	lock.writeLock().lock();
992	<	c.signal();
993	<	lock.writeLock().unlock();
994	<	t.join(SHORT_DELAY_MS);
995	<	assertFalse(t.isAlive());
996	<	}
997	<	catch (Exception ex) {
998	<	fail("unexpected exception");
999	<	}
988	>	/**
989	>	* awaitUninterruptibly doesn't abort on interrupt
990	>	*/
991	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
992	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
993	>	public void testAwaitUninterruptibly(boolean fair) {
994	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
995	>	final Condition c = lock.writeLock().newCondition();
996	>	final CountDownLatch locked = new CountDownLatch(1);
997	>	Thread t = newStartedThread(new CheckedRunnable() {
998	>	public void realRun() {
999	>	lock.writeLock().lock();
1000	>	locked.countDown();
1001	>	c.awaitUninterruptibly();
1002	>	assertTrue(Thread.interrupted());
1003	>	lock.writeLock().unlock();
1004	>	}});
1005	>
1006	>	await(locked);
1007	>	lock.writeLock().lock();
1008	>	lock.writeLock().unlock();
1009	>	t.interrupt();
1010	>	long timeoutMillis = 10;
1011	>	assertThreadJoinTimesOut(t, timeoutMillis);
1012	>	lock.writeLock().lock();
1013	>	c.signal();
1014	>	lock.writeLock().unlock();
1015	>	awaitTermination(t);
1016		}
1017
1018	<	public void testAwaitUninterruptibly() {
1019	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1018	>	/**
1019	>	* await/awaitNanos/awaitUntil is interruptible
1020	>	*/
1021	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1022	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1023	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1024	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1025	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1026	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1027	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1028	>	final PublicReentrantReadWriteLock lock =
1029	>	new PublicReentrantReadWriteLock(fair);
1030		final Condition c = lock.writeLock().newCondition();
1031	<	Thread t = new Thread(new Runnable() {
1032	<	public void run() {
1033	<	lock.writeLock().lock();
1034	<	c.awaitUninterruptibly();
1031	>	final CountDownLatch locked = new CountDownLatch(1);
1032	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1033	>	public void realRun() throws InterruptedException {
1034	>	lock.writeLock().lock();
1035	>	assertWriteLockedBy(lock, Thread.currentThread());
1036	>	assertHasNoWaiters(lock, c);
1037	>	locked.countDown();
1038	>	try {
1039	>	await(c, awaitMethod);
1040	>	} finally {
1041	>	assertWriteLockedBy(lock, Thread.currentThread());
1042	>	assertHasNoWaiters(lock, c);
1043		lock.writeLock().unlock();
1044	<	}
1045	<	});
1044	>	assertFalse(Thread.interrupted());
1045	>	}
1046	>	}});
1047	>
1048	>	await(locked);
1049	>	assertHasWaiters(lock, c, t);
1050	>	t.interrupt();
1051	>	awaitTermination(t);
1052	>	assertNotWriteLocked(lock);
1053	>	}
1054	>
1055	>	/**
1056	>	* signalAll wakes up all threads
1057	>	*/
1058	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1059	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1060	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1061	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1062	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1063	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1064	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1065	>	final PublicReentrantReadWriteLock lock =
1066	>	new PublicReentrantReadWriteLock(fair);
1067	>	final Condition c = lock.writeLock().newCondition();
1068	>	final CountDownLatch locked = new CountDownLatch(2);
1069	>	final Lock writeLock = lock.writeLock();
1070	>	class Awaiter extends CheckedRunnable {
1071	>	public void realRun() throws InterruptedException {
1072	>	writeLock.lock();
1073	>	locked.countDown();
1074	>	await(c, awaitMethod);
1075	>	writeLock.unlock();
1076	>	}
1077	>	}
1078	>
1079	>	Thread t1 = newStartedThread(new Awaiter());
1080	>	Thread t2 = newStartedThread(new Awaiter());
1081	>
1082	>	await(locked);
1083	>	writeLock.lock();
1084	>	assertHasWaiters(lock, c, t1, t2);
1085	>	c.signalAll();
1086	>	assertHasNoWaiters(lock, c);
1087	>	writeLock.unlock();
1088	>	awaitTermination(t1);
1089	>	awaitTermination(t2);
1090	>	}
1091	>
1092	>	/**
1093	>	* signal wakes up waiting threads in FIFO order.
1094	>	*/
1095	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1096	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1097	>	public void testSignalWakesFifo(boolean fair) {
1098	>	final PublicReentrantReadWriteLock lock =
1099	>	new PublicReentrantReadWriteLock(fair);
1100	>	final Condition c = lock.writeLock().newCondition();
1101	>	final CountDownLatch locked1 = new CountDownLatch(1);
1102	>	final CountDownLatch locked2 = new CountDownLatch(1);
1103	>	final Lock writeLock = lock.writeLock();
1104	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1105	>	public void realRun() throws InterruptedException {
1106	>	writeLock.lock();
1107	>	locked1.countDown();
1108	>	c.await();
1109	>	writeLock.unlock();
1110	>	}});
1111	>
1112	>	await(locked1);
1113	>
1114	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1115	>	public void realRun() throws InterruptedException {
1116	>	writeLock.lock();
1117	>	locked2.countDown();
1118	>	c.await();
1119	>	writeLock.unlock();
1120	>	}});
1121	>
1122	>	await(locked2);
1123	>
1124	>	writeLock.lock();
1125	>	assertHasWaiters(lock, c, t1, t2);
1126	>	assertFalse(lock.hasQueuedThreads());
1127	>	c.signal();
1128	>	assertHasWaiters(lock, c, t2);
1129	>	assertTrue(lock.hasQueuedThread(t1));
1130	>	assertFalse(lock.hasQueuedThread(t2));
1131	>	c.signal();
1132	>	assertHasNoWaiters(lock, c);
1133	>	assertTrue(lock.hasQueuedThread(t1));
1134	>	assertTrue(lock.hasQueuedThread(t2));
1135	>	writeLock.unlock();
1136	>	awaitTermination(t1);
1137	>	awaitTermination(t2);
1138	>	}
1139	>
1140	>	/**
1141	>	* await after multiple reentrant locking preserves lock count
1142	>	*/
1143	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1144	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1145	>	public void testAwaitLockCount(boolean fair) {
1146	>	final PublicReentrantReadWriteLock lock =
1147	>	new PublicReentrantReadWriteLock(fair);
1148	>	final Condition c = lock.writeLock().newCondition();
1149	>	final CountDownLatch locked = new CountDownLatch(2);
1150	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1151	>	public void realRun() throws InterruptedException {
1152	>	lock.writeLock().lock();
1153	>	assertWriteLockedBy(lock, Thread.currentThread());
1154	>	assertEquals(1, lock.writeLock().getHoldCount());
1155	>	locked.countDown();
1156	>	c.await();
1157	>	assertWriteLockedBy(lock, Thread.currentThread());
1158	>	assertEquals(1, lock.writeLock().getHoldCount());
1159	>	lock.writeLock().unlock();
1160	>	}});
1161	>
1162	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1163	>	public void realRun() throws InterruptedException {
1164	>	lock.writeLock().lock();
1165	>	lock.writeLock().lock();
1166	>	assertWriteLockedBy(lock, Thread.currentThread());
1167	>	assertEquals(2, lock.writeLock().getHoldCount());
1168	>	locked.countDown();
1169	>	c.await();
1170	>	assertWriteLockedBy(lock, Thread.currentThread());
1171	>	assertEquals(2, lock.writeLock().getHoldCount());
1172	>	lock.writeLock().unlock();
1173	>	lock.writeLock().unlock();
1174	>	}});
1175	>
1176	>	await(locked);
1177	>	lock.writeLock().lock();
1178	>	assertHasWaiters(lock, c, t1, t2);
1179	>	c.signalAll();
1180	>	assertHasNoWaiters(lock, c);
1181	>	lock.writeLock().unlock();
1182	>	awaitTermination(t1);
1183	>	awaitTermination(t2);
1184	>	}
1185	>
1186	>	/**
1187	>	* A serialized lock deserializes as unlocked
1188	>	*/
1189	>	public void testSerialization()      { testSerialization(false); }
1190	>	public void testSerialization_fair() { testSerialization(true); }
1191	>	public void testSerialization(boolean fair) {
1192	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1193	>	lock.writeLock().lock();
1194	>	lock.readLock().lock();
1195	>
1196	>	ReentrantReadWriteLock clone = serialClone(lock);
1197	>	assertEquals(lock.isFair(), clone.isFair());
1198	>	assertTrue(lock.isWriteLocked());
1199	>	assertFalse(clone.isWriteLocked());
1200	>	assertEquals(1, lock.getReadLockCount());
1201	>	assertEquals(0, clone.getReadLockCount());
1202	>	clone.writeLock().lock();
1203	>	clone.readLock().lock();
1204	>	assertTrue(clone.isWriteLocked());
1205	>	assertEquals(1, clone.getReadLockCount());
1206	>	clone.readLock().unlock();
1207	>	clone.writeLock().unlock();
1208	>	}
1209	>
1210	>	/**
1211	>	* hasQueuedThreads reports whether there are waiting threads
1212	>	*/
1213	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1214	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1215	>	public void testHasQueuedThreads(boolean fair) {
1216	>	final PublicReentrantReadWriteLock lock =
1217	>	new PublicReentrantReadWriteLock(fair);
1218	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1219	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1220	>	assertFalse(lock.hasQueuedThreads());
1221	>	lock.writeLock().lock();
1222	>	assertFalse(lock.hasQueuedThreads());
1223	>	t1.start();
1224	>	waitForQueuedThread(lock, t1);
1225	>	assertTrue(lock.hasQueuedThreads());
1226	>	t2.start();
1227	>	waitForQueuedThread(lock, t2);
1228	>	assertTrue(lock.hasQueuedThreads());
1229	>	t1.interrupt();
1230	>	awaitTermination(t1);
1231	>	assertTrue(lock.hasQueuedThreads());
1232	>	lock.writeLock().unlock();
1233	>	awaitTermination(t2);
1234	>	assertFalse(lock.hasQueuedThreads());
1235	>	}
1236	>
1237	>	/**
1238	>	* hasQueuedThread(null) throws NPE
1239	>	*/
1240	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1241	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1242	>	public void testHasQueuedThreadNPE(boolean fair) {
1243	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1244	>	try {
1245	>	lock.hasQueuedThread(null);
1246	>	shouldThrow();
1247	>	} catch (NullPointerException success) {}
1248	>	}
1249	>
1250	>	/**
1251	>	* hasQueuedThread reports whether a thread is queued.
1252	>	*/
1253	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1254	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1255	>	public void testHasQueuedThread(boolean fair) {
1256	>	final PublicReentrantReadWriteLock lock =
1257	>	new PublicReentrantReadWriteLock(fair);
1258	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1259	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1260	>	assertFalse(lock.hasQueuedThread(t1));
1261	>	assertFalse(lock.hasQueuedThread(t2));
1262	>	lock.writeLock().lock();
1263	>	t1.start();
1264	>	waitForQueuedThread(lock, t1);
1265	>	assertTrue(lock.hasQueuedThread(t1));
1266	>	assertFalse(lock.hasQueuedThread(t2));
1267	>	t2.start();
1268	>	waitForQueuedThread(lock, t2);
1269	>	assertTrue(lock.hasQueuedThread(t1));
1270	>	assertTrue(lock.hasQueuedThread(t2));
1271	>	t1.interrupt();
1272	>	awaitTermination(t1);
1273	>	assertFalse(lock.hasQueuedThread(t1));
1274	>	assertTrue(lock.hasQueuedThread(t2));
1275	>	lock.writeLock().unlock();
1276	>	awaitTermination(t2);
1277	>	assertFalse(lock.hasQueuedThread(t1));
1278	>	assertFalse(lock.hasQueuedThread(t2));
1279	>	}
1280	>
1281	>	/**
1282	>	* getQueueLength reports number of waiting threads
1283	>	*/
1284	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1285	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1286	>	public void testGetQueueLength(boolean fair) {
1287	>	final PublicReentrantReadWriteLock lock =
1288	>	new PublicReentrantReadWriteLock(fair);
1289	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1290	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1291	>	assertEquals(0, lock.getQueueLength());
1292	>	lock.writeLock().lock();
1293	>	t1.start();
1294	>	waitForQueuedThread(lock, t1);
1295	>	assertEquals(1, lock.getQueueLength());
1296	>	t2.start();
1297	>	waitForQueuedThread(lock, t2);
1298	>	assertEquals(2, lock.getQueueLength());
1299	>	t1.interrupt();
1300	>	awaitTermination(t1);
1301	>	assertEquals(1, lock.getQueueLength());
1302	>	lock.writeLock().unlock();
1303	>	awaitTermination(t2);
1304	>	assertEquals(0, lock.getQueueLength());
1305	>	}
1306
1307	+	/**
1308	+	* getQueuedThreads includes waiting threads
1309	+	*/
1310	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1311	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1312	+	public void testGetQueuedThreads(boolean fair) {
1313	+	final PublicReentrantReadWriteLock lock =
1314	+	new PublicReentrantReadWriteLock(fair);
1315	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1316	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1317	+	assertTrue(lock.getQueuedThreads().isEmpty());
1318	+	lock.writeLock().lock();
1319	+	assertTrue(lock.getQueuedThreads().isEmpty());
1320	+	t1.start();
1321	+	waitForQueuedThread(lock, t1);
1322	+	assertEquals(1, lock.getQueuedThreads().size());
1323	+	assertTrue(lock.getQueuedThreads().contains(t1));
1324	+	t2.start();
1325	+	waitForQueuedThread(lock, t2);
1326	+	assertEquals(2, lock.getQueuedThreads().size());
1327	+	assertTrue(lock.getQueuedThreads().contains(t1));
1328	+	assertTrue(lock.getQueuedThreads().contains(t2));
1329	+	t1.interrupt();
1330	+	awaitTermination(t1);
1331	+	assertFalse(lock.getQueuedThreads().contains(t1));
1332	+	assertTrue(lock.getQueuedThreads().contains(t2));
1333	+	assertEquals(1, lock.getQueuedThreads().size());
1334	+	lock.writeLock().unlock();
1335	+	awaitTermination(t2);
1336	+	assertTrue(lock.getQueuedThreads().isEmpty());
1337	+	}
1338	+
1339	+	/**
1340	+	* hasWaiters throws NPE if null
1341	+	*/
1342	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1343	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1344	+	public void testHasWaitersNPE(boolean fair) {
1345	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1346	+	try {
1347	+	lock.hasWaiters(null);
1348	+	shouldThrow();
1349	+	} catch (NullPointerException success) {}
1350	+	}
1351	+
1352	+	/**
1353	+	* getWaitQueueLength throws NPE if null
1354	+	*/
1355	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1356	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1357	+	public void testGetWaitQueueLengthNPE(boolean fair) {
1358	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1359	+	try {
1360	+	lock.getWaitQueueLength(null);
1361	+	shouldThrow();
1362	+	} catch (NullPointerException success) {}
1363	+	}
1364	+
1365	+	/**
1366	+	* getWaitingThreads throws NPE if null
1367	+	*/
1368	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1369	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1370	+	public void testGetWaitingThreadsNPE(boolean fair) {
1371	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1372	+	try {
1373	+	lock.getWaitingThreads(null);
1374	+	shouldThrow();
1375	+	} catch (NullPointerException success) {}
1376	+	}
1377	+
1378	+	/**
1379	+	* hasWaiters throws IllegalArgumentException if not owned
1380	+	*/
1381	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1382	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1383	+	public void testHasWaitersIAE(boolean fair) {
1384	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1385	+	final Condition c = lock.writeLock().newCondition();
1386	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1387		try {
1388	<	t.start();
1389	<	Thread.sleep(SHORT_DELAY_MS);
1390	<	t.interrupt();
494	<	lock.writeLock().lock();
495	<	c.signal();
496	<	lock.writeLock().unlock();
497	<	t.join(SHORT_DELAY_MS);
498	<	assertFalse(t.isAlive());
499	<	}
500	<	catch (Exception ex) {
501	<	fail("unexpected exception");
502	<	}
1388	>	lock2.hasWaiters(c);
1389	>	shouldThrow();
1390	>	} catch (IllegalArgumentException success) {}
1391		}
1392
1393	<	public void testAwait_Interrupt() {
1394	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1395	<	final Condition c = lock.writeLock().newCondition();
1396	<	Thread t = new Thread(new Runnable() {
1397	<	public void run() {
1398	<	try {
1399	<	lock.writeLock().lock();
1400	<	c.await();
1401	<	lock.writeLock().unlock();
1402	<	fail("should throw");
1403	<	}
1404	<	catch(InterruptedException success) {
517	<	}
518	<	}
519	<	});
520	<
521	<	try {
522	<	t.start();
523	<	Thread.sleep(SHORT_DELAY_MS);
524	<	t.interrupt();
525	<	t.join(SHORT_DELAY_MS);
526	<	assertFalse(t.isAlive());
527	<	}
528	<	catch (Exception ex) {
529	<	fail("unexpected exception");
530	<	}
531	<	}
532	<
533	<	public void testAwaitNanos_Interrupt() {
534	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
535	<	final Condition c = lock.writeLock().newCondition();
536	<	Thread t = new Thread(new Runnable() {
537	<	public void run() {
538	<	try {
539	<	lock.writeLock().lock();
540	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
541	<	lock.writeLock().unlock();
542	<	fail("should throw");
543	<	}
544	<	catch(InterruptedException success) {
545	<	}
546	<	}
547	<	});
548	<
549	<	try {
550	<	t.start();
551	<	Thread.sleep(SHORT_DELAY_MS);
552	<	t.interrupt();
553	<	t.join(SHORT_DELAY_MS);
554	<	assertFalse(t.isAlive());
555	<	}
556	<	catch (Exception ex) {
557	<	fail("unexpected exception");
558	<	}
559	<	}
560	<
561	<	public void testAwaitUntil_Interrupt() {
562	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
563	<	final Condition c = lock.writeLock().newCondition();
564	<	Thread t = new Thread(new Runnable() {
565	<	public void run() {
566	<	try {
567	<	lock.writeLock().lock();
568	<	java.util.Date d = new java.util.Date();
569	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
570	<	lock.writeLock().unlock();
571	<	fail("should throw");
572	<	}
573	<	catch(InterruptedException success) {
574	<	}
575	<	}
576	<	});
577	<
578	<	try {
579	<	t.start();
580	<	Thread.sleep(SHORT_DELAY_MS);
581	<	t.interrupt();
582	<	t.join(SHORT_DELAY_MS);
583	<	assertFalse(t.isAlive());
584	<	}
585	<	catch (Exception ex) {
586	<	fail("unexpected exception");
587	<	}
588	<	}
589	<
590	<	public void testSignalAll() {
591	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
592	<	final Condition c = lock.writeLock().newCondition();
593	<	Thread t1 = new Thread(new Runnable() {
594	<	public void run() {
595	<	try {
596	<	lock.writeLock().lock();
597	<	c.await();
598	<	lock.writeLock().unlock();
599	<	}
600	<	catch(InterruptedException e) {
601	<	fail("unexpected exception");
602	<	}
603	<	}
604	<	});
605	<
606	<	Thread t2 = new Thread(new Runnable() {
607	<	public void run() {
608	<	try {
609	<	lock.writeLock().lock();
610	<	c.await();
611	<	lock.writeLock().unlock();
612	<	}
613	<	catch(InterruptedException e) {
614	<	fail("unexpected exception");
615	<	}
616	<	}
617	<	});
618	<
619	<	try {
620	<	t1.start();
621	<	t2.start();
622	<	Thread.sleep(SHORT_DELAY_MS);
623	<	lock.writeLock().lock();
624	<	c.signalAll();
625	<	lock.writeLock().unlock();
626	<	t1.join(SHORT_DELAY_MS);
627	<	t2.join(SHORT_DELAY_MS);
628	<	assertFalse(t1.isAlive());
629	<	assertFalse(t2.isAlive());
630	<	}
631	<	catch (Exception ex) {
632	<	fail("unexpected exception");
633	<	}
1393	>	/**
1394	>	* hasWaiters throws IllegalMonitorStateException if not locked
1395	>	*/
1396	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1397	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1398	>	public void testHasWaitersIMSE(boolean fair) {
1399	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1400	>	final Condition c = lock.writeLock().newCondition();
1401	>	try {
1402	>	lock.hasWaiters(c);
1403	>	shouldThrow();
1404	>	} catch (IllegalMonitorStateException success) {}
1405		}
1406
1407	<	public void testSerialization() {
1408	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1409	<	l.readLock().lock();
1410	<	l.readLock().unlock();
1411	<
1412	<	try {
1413	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1414	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1415	<	out.writeObject(l);
1416	<	out.close();
1417	<
1418	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1419	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
649	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
650	<	r.readLock().lock();
651	<	r.readLock().unlock();
652	<	} catch(Exception e){
653	<	e.printStackTrace();
654	<	fail("unexpected exception");
655	<	}
1407	>	/**
1408	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1409	>	*/
1410	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1411	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1412	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1413	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1414	>	final Condition c = lock.writeLock().newCondition();
1415	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1416	>	try {
1417	>	lock2.getWaitQueueLength(c);
1418	>	shouldThrow();
1419	>	} catch (IllegalArgumentException success) {}
1420		}
1421
1422	+	/**
1423	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1424	+	*/
1425	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1426	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1427	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
1428	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1429	+	final Condition c = lock.writeLock().newCondition();
1430	+	try {
1431	+	lock.getWaitQueueLength(c);
1432	+	shouldThrow();
1433	+	} catch (IllegalMonitorStateException success) {}
1434	+	}
1435	+
1436	+	/**
1437	+	* getWaitingThreads throws IllegalArgumentException if not owned
1438	+	*/
1439	+	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1440	+	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1441	+	public void testGetWaitingThreadsIAE(boolean fair) {
1442	+	final PublicReentrantReadWriteLock lock =
1443	+	new PublicReentrantReadWriteLock(fair);
1444	+	final Condition c = lock.writeLock().newCondition();
1445	+	final PublicReentrantReadWriteLock lock2 =
1446	+	new PublicReentrantReadWriteLock(fair);
1447	+	try {
1448	+	lock2.getWaitingThreads(c);
1449	+	shouldThrow();
1450	+	} catch (IllegalArgumentException success) {}
1451	+	}
1452	+
1453	+	/**
1454	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
1455	+	*/
1456	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1457	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1458	+	public void testGetWaitingThreadsIMSE(boolean fair) {
1459	+	final PublicReentrantReadWriteLock lock =
1460	+	new PublicReentrantReadWriteLock(fair);
1461	+	final Condition c = lock.writeLock().newCondition();
1462	+	try {
1463	+	lock.getWaitingThreads(c);
1464	+	shouldThrow();
1465	+	} catch (IllegalMonitorStateException success) {}
1466	+	}
1467	+
1468	+	/**
1469	+	* hasWaiters returns true when a thread is waiting, else false
1470	+	*/
1471	+	public void testHasWaiters()      { testHasWaiters(false); }
1472	+	public void testHasWaiters_fair() { testHasWaiters(true); }
1473	+	public void testHasWaiters(boolean fair) {
1474	+	final PublicReentrantReadWriteLock lock =
1475	+	new PublicReentrantReadWriteLock(fair);
1476	+	final Condition c = lock.writeLock().newCondition();
1477	+	final CountDownLatch locked = new CountDownLatch(1);
1478	+	Thread t = newStartedThread(new CheckedRunnable() {
1479	+	public void realRun() throws InterruptedException {
1480	+	lock.writeLock().lock();
1481	+	assertHasNoWaiters(lock, c);
1482	+	assertFalse(lock.hasWaiters(c));
1483	+	locked.countDown();
1484	+	c.await();
1485	+	assertHasNoWaiters(lock, c);
1486	+	assertFalse(lock.hasWaiters(c));
1487	+	lock.writeLock().unlock();
1488	+	}});
1489	+
1490	+	await(locked);
1491	+	lock.writeLock().lock();
1492	+	assertHasWaiters(lock, c, t);
1493	+	assertTrue(lock.hasWaiters(c));
1494	+	c.signal();
1495	+	assertHasNoWaiters(lock, c);
1496	+	assertFalse(lock.hasWaiters(c));
1497	+	lock.writeLock().unlock();
1498	+	awaitTermination(t);
1499	+	assertHasNoWaiters(lock, c);
1500	+	}
1501	+
1502	+	/**
1503	+	* getWaitQueueLength returns number of waiting threads
1504	+	*/
1505	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1506	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1507	+	public void testGetWaitQueueLength(boolean fair) {
1508	+	final PublicReentrantReadWriteLock lock =
1509	+	new PublicReentrantReadWriteLock(fair);
1510	+	final Condition c = lock.writeLock().newCondition();
1511	+	final CountDownLatch locked = new CountDownLatch(1);
1512	+	Thread t = newStartedThread(new CheckedRunnable() {
1513	+	public void realRun() throws InterruptedException {
1514	+	lock.writeLock().lock();
1515	+	assertEquals(0, lock.getWaitQueueLength(c));
1516	+	locked.countDown();
1517	+	c.await();
1518	+	lock.writeLock().unlock();
1519	+	}});
1520	+
1521	+	await(locked);
1522	+	lock.writeLock().lock();
1523	+	assertHasWaiters(lock, c, t);
1524	+	assertEquals(1, lock.getWaitQueueLength(c));
1525	+	c.signal();
1526	+	assertHasNoWaiters(lock, c);
1527	+	assertEquals(0, lock.getWaitQueueLength(c));
1528	+	lock.writeLock().unlock();
1529	+	awaitTermination(t);
1530	+	}
1531	+
1532	+	/**
1533	+	* getWaitingThreads returns only and all waiting threads
1534	+	*/
1535	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1536	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1537	+	public void testGetWaitingThreads(boolean fair) {
1538	+	final PublicReentrantReadWriteLock lock =
1539	+	new PublicReentrantReadWriteLock(fair);
1540	+	final Condition c = lock.writeLock().newCondition();
1541	+	final CountDownLatch locked1 = new CountDownLatch(1);
1542	+	final CountDownLatch locked2 = new CountDownLatch(1);
1543	+	Thread t1 = new Thread(new CheckedRunnable() {
1544	+	public void realRun() throws InterruptedException {
1545	+	lock.writeLock().lock();
1546	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1547	+	locked1.countDown();
1548	+	c.await();
1549	+	lock.writeLock().unlock();
1550	+	}});
1551	+
1552	+	Thread t2 = new Thread(new CheckedRunnable() {
1553	+	public void realRun() throws InterruptedException {
1554	+	lock.writeLock().lock();
1555	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1556	+	locked2.countDown();
1557	+	c.await();
1558	+	lock.writeLock().unlock();
1559	+	}});
1560	+
1561	+	lock.writeLock().lock();
1562	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1563	+	lock.writeLock().unlock();
1564	+
1565	+	t1.start();
1566	+	await(locked1);
1567	+	t2.start();
1568	+	await(locked2);
1569	+
1570	+	lock.writeLock().lock();
1571	+	assertTrue(lock.hasWaiters(c));
1572	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1573	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1574	+	assertEquals(2, lock.getWaitingThreads(c).size());
1575	+	c.signalAll();
1576	+	assertHasNoWaiters(lock, c);
1577	+	lock.writeLock().unlock();
1578	+
1579	+	awaitTermination(t1);
1580	+	awaitTermination(t2);
1581	+
1582	+	assertHasNoWaiters(lock, c);
1583	+	}
1584	+
1585	+	/**
1586	+	* toString indicates current lock state
1587	+	*/
1588	+	public void testToString()      { testToString(false); }
1589	+	public void testToString_fair() { testToString(true); }
1590	+	public void testToString(boolean fair) {
1591	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1592	+	String us = lock.toString();
1593	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1594	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1595	+	lock.writeLock().lock();
1596	+	String ws = lock.toString();
1597	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1598	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1599	+	lock.writeLock().unlock();
1600	+	lock.readLock().lock();
1601	+	lock.readLock().lock();
1602	+	String rs = lock.toString();
1603	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1604	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1605	+	}
1606	+
1607	+	/**
1608	+	* readLock.toString indicates current lock state
1609	+	*/
1610	+	public void testReadLockToString()      { testReadLockToString(false); }
1611	+	public void testReadLockToString_fair() { testReadLockToString(true); }
1612	+	public void testReadLockToString(boolean fair) {
1613	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1614	+	String us = lock.readLock().toString();
1615	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1616	+	lock.readLock().lock();
1617	+	lock.readLock().lock();
1618	+	String rs = lock.readLock().toString();
1619	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1620	+	}
1621	+
1622	+	/**
1623	+	* writeLock.toString indicates current lock state
1624	+	*/
1625	+	public void testWriteLockToString()      { testWriteLockToString(false); }
1626	+	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1627	+	public void testWriteLockToString(boolean fair) {
1628	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1629	+	String us = lock.writeLock().toString();
1630	+	assertTrue(us.indexOf("Unlocked") >= 0);
1631	+	lock.writeLock().lock();
1632	+	String ls = lock.writeLock().toString();
1633	+	assertTrue(ls.indexOf("Locked") >= 0);
1634	+	}
1635
1636		}

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