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

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