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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.74 by jsr166, Sun May 24 01:42:14 2015 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	main(suite(), args);
27		}
28		public static Test suite() {
29	<	return new TestSuite(ReentrantReadWriteLockTest.class);
29	>	return new TestSuite(ReentrantReadWriteLockTest.class);
30		}
31
32	<	static int HOLD_COUNT_TEST_LIMIT = 20;
33	<
23	<	/*
24	<	* Unlocks an unlocked lock, throws Illegal Monitor State
25	<	*
32	>	/**
33	>	* A runnable calling lockInterruptibly
34		*/
35	<	public void testIllegalMonitorStateException(){
36	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
37	<	try{
38	<	rl.writeLock().unlock();
39	<	fail("Should of thown Illegal Monitor State Exception");
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36	>	final ReentrantReadWriteLock lock;
37	>	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
38	>	public void realRun() throws InterruptedException {
39	>	lock.writeLock().lockInterruptibly();
40	>	}
41	>	}
42
43	<	}catch(IllegalMonitorStateException success){}
43	>	/**
44	>	* A runnable calling lockInterruptibly that expects to be
45	>	* interrupted
46	>	*/
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48	>	final ReentrantReadWriteLock lock;
49	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
50	>	public void realRun() throws InterruptedException {
51	>	lock.writeLock().lockInterruptibly();
52	>	}
53		}
54
55	+	/**
56	+	* Subclass to expose protected methods
57	+	*/
58	+	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59	+	PublicReentrantReadWriteLock() { super(); }
60	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	+	public Thread getOwner() {
62	+	return super.getOwner();
63	+	}
64	+	public Collection<Thread> getQueuedThreads() {
65	+	return super.getQueuedThreads();
66	+	}
67	+	public Collection<Thread> getWaitingThreads(Condition c) {
68	+	return super.getWaitingThreads(c);
69	+	}
70	+	}
71
72	+	/**
73	+	* Releases write lock, checking that it had a hold count of 1.
74	+	*/
75	+	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76	+	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	+	assertWriteLockedByMoi(lock);
78	+	assertEquals(1, lock.getWriteHoldCount());
79	+	writeLock.unlock();
80	+	assertNotWriteLocked(lock);
81	+	}
82
83	<	public void testInterruptedException(){
84	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
85	<	lock.writeLock().lock();
86	<	Thread t = new Thread(new Runnable() {
87	<	public void run(){
88	<	try{
89	<	lock.writeLock().lockInterruptibly();
90	<	threadFail("should throw");
91	<	}catch(InterruptedException success){}
47	<	}
48	<	});
49	<	try {
50	<	t.start();
51	<	t.interrupt();
52	<	lock.writeLock().unlock();
53	<	t.join();
54	<	} catch(Exception e){
55	<	fail("unexpected exception");
56	<	}
57	<	}
58	<
59	<	public void testInterruptedException2(){
60	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
61	<	lock.writeLock().lock();
62	<	Thread t = new Thread(new Runnable() {
63	<	public void run(){
64	<	try{
65	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
66	<	threadFail("should throw");
67	<	}catch(InterruptedException success){}
68	<	}
69	<	});
70	<	try {
71	<	t.start();
72	<	t.interrupt();
73	<	lock.writeLock().unlock();
74	<	t.join();
75	<	} catch(Exception e){
76	<	fail("unexpected exception");
83	>	/**
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85	>	*/
86	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
87	>	long startTime = System.nanoTime();
88	>	while (!lock.hasQueuedThread(t)) {
89	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	>	throw new AssertionFailedError("timed out");
91	>	Thread.yield();
92		}
93	+	assertTrue(t.isAlive());
94	+	assertNotSame(t, lock.getOwner());
95		}
96
97	<	public void testInterruptedException3(){
98	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
99	<	lock.writeLock().lock();
100	<	Thread t = new Thread(new Runnable() {
101	<	public void run(){
102	<	try{
103	<	lock.readLock().lockInterruptibly();
104	<	threadFail("should throw");
105	<	}catch(InterruptedException success){}
106	<	}
107	<	});
108	<	try {
109	<	t.start();
110	<	t.interrupt();
111	<	lock.writeLock().unlock();
112	<	t.join();
113	<	} catch(Exception e){
114	<	fail("unexpected exception");
115	<	}
116	<	}
117	<
118	<	public void testInterruptedException4(){
119	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
120	<	lock.writeLock().lock();
121	<	Thread t = new Thread(new Runnable() {
122	<	public void run(){
123	<	try{
124	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
125	<	threadFail("should throw");
126	<	}catch(InterruptedException success){}
127	<	}
128	<	});
129	<	try {
130	<	t.start();
131	<	t.interrupt();
132	<	t.join();
133	<	} catch(Exception e){
134	<	fail("unexpected exception");
97	>	/**
98	>	* Checks that lock is not write-locked.
99	>	*/
100	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
101	>	assertFalse(lock.isWriteLocked());
102	>	assertFalse(lock.isWriteLockedByCurrentThread());
103	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
104	>	assertEquals(0, lock.getWriteHoldCount());
105	>	assertEquals(0, lock.writeLock().getHoldCount());
106	>	assertNull(lock.getOwner());
107	>	}
108	>
109	>	/**
110	>	* Checks that lock is write-locked by the given thread.
111	>	*/
112	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
113	>	assertTrue(lock.isWriteLocked());
114	>	assertSame(t, lock.getOwner());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.isWriteLockedByCurrentThread());
117	>	assertEquals(t == Thread.currentThread(),
118	>	lock.writeLock().isHeldByCurrentThread());
119	>	assertEquals(t == Thread.currentThread(),
120	>	lock.getWriteHoldCount() > 0);
121	>	assertEquals(t == Thread.currentThread(),
122	>	lock.writeLock().getHoldCount() > 0);
123	>	assertEquals(0, lock.getReadLockCount());
124	>	}
125	>
126	>	/**
127	>	* Checks that lock is write-locked by the current thread.
128	>	*/
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131	>	}
132	>
133	>	/**
134	>	* Checks that condition c has no waiters.
135	>	*/
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139	>
140	>	/**
141	>	* Checks that condition c has exactly the given waiter threads.
142	>	*/
143	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
144	>	Thread... threads) {
145	>	lock.writeLock().lock();
146	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
147	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
148	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
149	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
150	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
151	>	new HashSet<Thread>(Arrays.asList(threads)));
152	>	lock.writeLock().unlock();
153	>	}
154	>
155	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	>
157	>	/**
158	>	* Awaits condition using the specified AwaitMethod.
159	>	*/
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	switch (awaitMethod) {
163	>	case await:
164	>	c.await();
165	>	break;
166	>	case awaitTimed:
167	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
168	>	break;
169	>	case awaitNanos:
170	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
171	>	assertTrue(nanosRemaining > 0);
172	>	break;
173	>	case awaitUntil:
174	>	java.util.Date d = new java.util.Date();
175	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
176	>	break;
177	>	default:
178	>	throw new AssertionError();
179		}
180		}
181
182	<
183	<	public void testTryLockWhenLocked() {
184	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
185	<	lock.writeLock().lock();
186	<	Thread t = new Thread(new Runnable() {
187	<	public void run(){
188	<	threadAssertFalse(lock.writeLock().tryLock());
189	<	}
190	<	});
191	<	try {
192	<	t.start();
193	<	t.join();
182	>	/**
183	>	* Constructor sets given fairness, and is in unlocked state
184	>	*/
185	>	public void testConstructor() {
186	>	PublicReentrantReadWriteLock lock;
187	>
188	>	lock = new PublicReentrantReadWriteLock();
189	>	assertFalse(lock.isFair());
190	>	assertNotWriteLocked(lock);
191	>	assertEquals(0, lock.getReadLockCount());
192	>
193	>	lock = new PublicReentrantReadWriteLock(true);
194	>	assertTrue(lock.isFair());
195	>	assertNotWriteLocked(lock);
196	>	assertEquals(0, lock.getReadLockCount());
197	>
198	>	lock = new PublicReentrantReadWriteLock(false);
199	>	assertFalse(lock.isFair());
200	>	assertNotWriteLocked(lock);
201	>	assertEquals(0, lock.getReadLockCount());
202	>	}
203	>
204	>	/**
205	>	* write-locking and read-locking an unlocked lock succeed
206	>	*/
207	>	public void testLock()      { testLock(false); }
208	>	public void testLock_fair() { testLock(true); }
209	>	public void testLock(boolean fair) {
210	>	PublicReentrantReadWriteLock lock =
211	>	new PublicReentrantReadWriteLock(fair);
212	>	assertNotWriteLocked(lock);
213	>	lock.writeLock().lock();
214	>	assertWriteLockedByMoi(lock);
215	>	lock.writeLock().unlock();
216	>	assertNotWriteLocked(lock);
217	>	assertEquals(0, lock.getReadLockCount());
218	>	lock.readLock().lock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(1, lock.getReadLockCount());
221	>	lock.readLock().unlock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(0, lock.getReadLockCount());
224	>	}
225	>
226	>	/**
227	>	* getWriteHoldCount returns number of recursive holds
228	>	*/
229	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
230	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
231	>	public void testGetWriteHoldCount(boolean fair) {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.writeLock().lock();
235	>	assertEquals(i,lock.getWriteHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238		lock.writeLock().unlock();
239	<	} catch(Exception e){
135	<	fail("unexpected exception");
239	>	assertEquals(i - 1,lock.getWriteHoldCount());
240		}
241	<	}
241	>	}
242
243	<	public void testTryLockWhenLocked2() {
244	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
245	<	lock.writeLock().lock();
246	<	Thread t = new Thread(new Runnable() {
247	<	public void run(){
248	<	threadAssertFalse(lock.readLock().tryLock());
249	<	}
250	<	});
251	<	try {
252	<	t.start();
253	<	t.join();
243	>	/**
244	>	* writelock.getHoldCount returns number of recursive holds
245	>	*/
246	>	public void testGetHoldCount()      { testGetHoldCount(false); }
247	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
248	>	public void testGetHoldCount(boolean fair) {
249	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
250	>	for (int i = 1; i <= SIZE; i++) {
251	>	lock.writeLock().lock();
252	>	assertEquals(i,lock.writeLock().getHoldCount());
253	>	}
254	>	for (int i = SIZE; i > 0; i--) {
255		lock.writeLock().unlock();
256	<	} catch(Exception e){
152	<	fail("unexpected exception");
256	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
257		}
258	<	}
258	>	}
259
260	<	public void testMultipleReadLocks() {
261	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
262	<	lock.readLock().lock();
263	<	Thread t = new Thread(new Runnable() {
264	<	public void run(){
265	<	threadAssertTrue(lock.readLock().tryLock());
266	<	lock.readLock().unlock();
267	<	}
268	<	});
269	<	try {
270	<	t.start();
271	<	t.join();
260	>	/**
261	>	* getReadHoldCount returns number of recursive holds
262	>	*/
263	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
264	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
265	>	public void testGetReadHoldCount(boolean fair) {
266	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
267	>	for (int i = 1; i <= SIZE; i++) {
268	>	lock.readLock().lock();
269	>	assertEquals(i,lock.getReadHoldCount());
270	>	}
271	>	for (int i = SIZE; i > 0; i--) {
272		lock.readLock().unlock();
273	<	} catch(Exception e){
170	<	fail("unexpected exception");
273	>	assertEquals(i - 1,lock.getReadHoldCount());
274		}
275	<	}
173	<
174	<	public void testWriteAfterMultipleReadLocks() {
175	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
176	<	lock.readLock().lock();
177	<	Thread t1 = new Thread(new Runnable() {
178	<	public void run(){
179	<	lock.readLock().lock();
180	<	lock.readLock().unlock();
181	<	}
182	<	});
183	<	Thread t2 = new Thread(new Runnable() {
184	<	public void run(){
185	<	lock.writeLock().lock();
186	<	lock.writeLock().unlock();
187	<	}
188	<	});
275	>	}
276
277	+	/**
278	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
279	+	*/
280	+	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
281	+	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
282	+	public void testWriteUnlock_IMSE(boolean fair) {
283	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
284		try {
191	–	t1.start();
192	–	t2.start();
193	–	Thread.sleep(SHORT_DELAY_MS);
194	–	lock.readLock().unlock();
195	–	t1.join(MEDIUM_DELAY_MS);
196	–	t2.join(MEDIUM_DELAY_MS);
197	–	assertTrue(!t1.isAlive());
198	–	assertTrue(!t2.isAlive());
199	–
200	–	} catch(Exception e){
201	–	fail("unexpected exception");
202	–	}
203	–	}
204	–
205	–	public void testReadAfterWriteLock() {
206	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
207	–	lock.writeLock().lock();
208	–	Thread t1 = new Thread(new Runnable() {
209	–	public void run(){
210	–	lock.readLock().lock();
211	–	lock.readLock().unlock();
212	–	}
213	–	});
214	–	Thread t2 = new Thread(new Runnable() {
215	–	public void run(){
216	–	lock.readLock().lock();
217	–	lock.readLock().unlock();
218	–	}
219	–	});
220	–
221	–	try {
222	–	t1.start();
223	–	t2.start();
224	–	Thread.sleep(SHORT_DELAY_MS);
285		lock.writeLock().unlock();
286	<	t1.join(MEDIUM_DELAY_MS);
287	<	t2.join(MEDIUM_DELAY_MS);
288	<	assertTrue(!t1.isAlive());
289	<	assertTrue(!t2.isAlive());
290	<
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
293	<	}
294	<	}
295	<
296	<
237	<	public void testTryLockWhenReadLocked() {
238	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
239	<	lock.readLock().lock();
240	<	Thread t = new Thread(new Runnable() {
241	<	public void run(){
242	<	threadAssertTrue(lock.readLock().tryLock());
243	<	lock.readLock().unlock();
244	<	}
245	<	});
286	>	shouldThrow();
287	>	} catch (IllegalMonitorStateException success) {}
288	>	}
289	>
290	>	/**
291	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
292	>	*/
293	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
294	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
295	>	public void testReadUnlock_IMSE(boolean fair) {
296	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
297		try {
247	–	t.start();
248	–	t.join();
298		lock.readLock().unlock();
299	<	} catch(Exception e){
300	<	fail("unexpected exception");
301	<	}
302	<	}
299	>	shouldThrow();
300	>	} catch (IllegalMonitorStateException success) {}
301	>	}
302	>
303	>	/**
304	>	* write-lockInterruptibly is interruptible
305	>	*/
306	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
307	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
308	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
309	>	final PublicReentrantReadWriteLock lock =
310	>	new PublicReentrantReadWriteLock(fair);
311	>	lock.writeLock().lock();
312	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
313	>	public void realRun() throws InterruptedException {
314	>	lock.writeLock().lockInterruptibly();
315	>	}});
316	>
317	>	waitForQueuedThread(lock, t);
318	>	t.interrupt();
319	>	awaitTermination(t);
320	>	releaseWriteLock(lock);
321	>	}
322
323	<
323	>	/**
324	>	* timed write-tryLock is interruptible
325	>	*/
326	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
327	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
328	>	public void testWriteTryLock_Interruptible(boolean fair) {
329	>	final PublicReentrantReadWriteLock lock =
330	>	new PublicReentrantReadWriteLock(fair);
331	>	lock.writeLock().lock();
332	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
333	>	public void realRun() throws InterruptedException {
334	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
335	>	}});
336	>
337	>	waitForQueuedThread(lock, t);
338	>	t.interrupt();
339	>	awaitTermination(t);
340	>	releaseWriteLock(lock);
341	>	}
342
343	<	public void testWriteTryLockWhenReadLocked() {
344	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
345	<	lock.readLock().lock();
346	<	Thread t = new Thread(new Runnable() {
347	<	public void run(){
348	<	threadAssertFalse(lock.writeLock().tryLock());
349	<	}
350	<	});
351	<	try {
352	<	t.start();
353	<	t.join();
354	<	lock.readLock().unlock();
355	<	} catch(Exception e){
356	<	fail("unexpected exception");
357	<	}
358	<	}
343	>	/**
344	>	* read-lockInterruptibly is interruptible
345	>	*/
346	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
347	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
348	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
349	>	final PublicReentrantReadWriteLock lock =
350	>	new PublicReentrantReadWriteLock(fair);
351	>	lock.writeLock().lock();
352	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
353	>	public void realRun() throws InterruptedException {
354	>	lock.readLock().lockInterruptibly();
355	>	}});
356	>
357	>	waitForQueuedThread(lock, t);
358	>	t.interrupt();
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361	>	}
362
363	<
363	>	/**
364	>	* timed read-tryLock is interruptible
365	>	*/
366	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
367	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
368	>	public void testReadTryLock_Interruptible(boolean fair) {
369	>	final PublicReentrantReadWriteLock lock =
370	>	new PublicReentrantReadWriteLock(fair);
371	>	lock.writeLock().lock();
372	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
373	>	public void realRun() throws InterruptedException {
374	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
375	>	}});
376	>
377	>	waitForQueuedThread(lock, t);
378	>	t.interrupt();
379	>	awaitTermination(t);
380	>	releaseWriteLock(lock);
381	>	}
382
383	<	public void testTryLock_Timeout(){
384	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
385	<	lock.writeLock().lock();
386	<	Thread t = new Thread(new Runnable() {
387	<	public void run(){
388	<	try {
389	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
390	<	} catch (Exception ex) {
391	<	threadFail("unexpected exception");
392	<	}
393	<	}
394	<	});
395	<	try {
396	<	t.start();
397	<	t.join();
291	<	lock.writeLock().unlock();
292	<	} catch(Exception e){
293	<	fail("unexpected exception");
294	<	}
295	<	}
383	>	/**
384	>	* write-tryLock on an unlocked lock succeeds
385	>	*/
386	>	public void testWriteTryLock()      { testWriteTryLock(false); }
387	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
388	>	public void testWriteTryLock(boolean fair) {
389	>	final PublicReentrantReadWriteLock lock =
390	>	new PublicReentrantReadWriteLock(fair);
391	>	assertTrue(lock.writeLock().tryLock());
392	>	assertWriteLockedByMoi(lock);
393	>	assertTrue(lock.writeLock().tryLock());
394	>	assertWriteLockedByMoi(lock);
395	>	lock.writeLock().unlock();
396	>	releaseWriteLock(lock);
397	>	}
398
399	<	public void testTryLock_Timeout2(){
400	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
401	<	lock.writeLock().lock();
402	<	Thread t = new Thread(new Runnable() {
403	<	public void run(){
404	<	try {
405	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
406	<	} catch (Exception ex) {
407	<	threadFail("unexpected exception");
408	<	}
409	<	}
410	<	});
411	<	try {
412	<	t.start();
413	<	t.join();
414	<	lock.writeLock().unlock();
415	<	} catch(Exception e){
416	<	fail("unexpected exception");
417	<	}
418	<	}
399	>	/**
400	>	* write-tryLock fails if locked
401	>	*/
402	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
403	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
404	>	public void testWriteTryLockWhenLocked(boolean fair) {
405	>	final PublicReentrantReadWriteLock lock =
406	>	new PublicReentrantReadWriteLock(fair);
407	>	lock.writeLock().lock();
408	>	Thread t = newStartedThread(new CheckedRunnable() {
409	>	public void realRun() {
410	>	assertFalse(lock.writeLock().tryLock());
411	>	}});
412	>
413	>	awaitTermination(t);
414	>	releaseWriteLock(lock);
415	>	}
416	>
417	>	/**
418	>	* read-tryLock fails if locked
419	>	*/
420	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
421	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
422	>	public void testReadTryLockWhenLocked(boolean fair) {
423	>	final PublicReentrantReadWriteLock lock =
424	>	new PublicReentrantReadWriteLock(fair);
425	>	lock.writeLock().lock();
426	>	Thread t = newStartedThread(new CheckedRunnable() {
427	>	public void realRun() {
428	>	assertFalse(lock.readLock().tryLock());
429	>	}});
430	>
431	>	awaitTermination(t);
432	>	releaseWriteLock(lock);
433	>	}
434	>
435	>	/**
436	>	* Multiple threads can hold a read lock when not write-locked
437	>	*/
438	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
439	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
440	>	public void testMultipleReadLocks(boolean fair) {
441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
442	>	lock.readLock().lock();
443	>	Thread t = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() throws InterruptedException {
445	>	assertTrue(lock.readLock().tryLock());
446	>	lock.readLock().unlock();
447	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
448	>	lock.readLock().unlock();
449	>	lock.readLock().lock();
450	>	lock.readLock().unlock();
451	>	}});
452	>
453	>	awaitTermination(t);
454	>	lock.readLock().unlock();
455	>	}
456	>
457	>	/**
458	>	* A writelock succeeds only after a reading thread unlocks
459	>	*/
460	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
461	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
462	>	public void testWriteAfterReadLock(boolean fair) {
463	>	final PublicReentrantReadWriteLock lock =
464	>	new PublicReentrantReadWriteLock(fair);
465	>	lock.readLock().lock();
466	>	Thread t = newStartedThread(new CheckedRunnable() {
467	>	public void realRun() {
468	>	assertEquals(1, lock.getReadLockCount());
469	>	lock.writeLock().lock();
470	>	assertEquals(0, lock.getReadLockCount());
471	>	lock.writeLock().unlock();
472	>	}});
473	>	waitForQueuedThread(lock, t);
474	>	assertNotWriteLocked(lock);
475	>	assertEquals(1, lock.getReadLockCount());
476	>	lock.readLock().unlock();
477	>	assertEquals(0, lock.getReadLockCount());
478	>	awaitTermination(t);
479	>	assertNotWriteLocked(lock);
480	>	}
481	>
482	>	/**
483	>	* A writelock succeeds only after reading threads unlock
484	>	*/
485	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
486	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
487	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
488	>	final PublicReentrantReadWriteLock lock =
489	>	new PublicReentrantReadWriteLock(fair);
490	>	lock.readLock().lock();
491	>	lock.readLock().lock();
492	>	Thread t1 = newStartedThread(new CheckedRunnable() {
493	>	public void realRun() {
494	>	lock.readLock().lock();
495	>	assertEquals(3, lock.getReadLockCount());
496	>	lock.readLock().unlock();
497	>	}});
498	>	awaitTermination(t1);
499	>
500	>	Thread t2 = newStartedThread(new CheckedRunnable() {
501	>	public void realRun() {
502	>	assertEquals(2, lock.getReadLockCount());
503	>	lock.writeLock().lock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	lock.writeLock().unlock();
506	>	}});
507	>	waitForQueuedThread(lock, t2);
508	>	assertNotWriteLocked(lock);
509	>	assertEquals(2, lock.getReadLockCount());
510	>	lock.readLock().unlock();
511	>	lock.readLock().unlock();
512	>	assertEquals(0, lock.getReadLockCount());
513	>	awaitTermination(t2);
514	>	assertNotWriteLocked(lock);
515	>	}
516
517	+	/**
518	+	* A thread that tries to acquire a fair read lock (non-reentrantly)
519	+	* will block if there is a waiting writer thread
520	+	*/
521	+	public void testReaderWriterReaderFairFifo() {
522	+	final PublicReentrantReadWriteLock lock =
523	+	new PublicReentrantReadWriteLock(true);
524	+	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
525	+
526	+	lock.readLock().lock();
527	+	Thread t1 = newStartedThread(new CheckedRunnable() {
528	+	public void realRun() {
529	+	assertEquals(1, lock.getReadLockCount());
530	+	lock.writeLock().lock();
531	+	assertEquals(0, lock.getReadLockCount());
532	+	t1GotLock.set(true);
533	+	lock.writeLock().unlock();
534	+	}});
535	+	waitForQueuedThread(lock, t1);
536	+
537	+	Thread t2 = newStartedThread(new CheckedRunnable() {
538	+	public void realRun() {
539	+	assertEquals(1, lock.getReadLockCount());
540	+	lock.readLock().lock();
541	+	assertEquals(1, lock.getReadLockCount());
542	+	assertTrue(t1GotLock.get());
543	+	lock.readLock().unlock();
544	+	}});
545	+	waitForQueuedThread(lock, t2);
546	+	assertTrue(t1.isAlive());
547	+	assertNotWriteLocked(lock);
548	+	assertEquals(1, lock.getReadLockCount());
549	+	lock.readLock().unlock();
550	+	awaitTermination(t1);
551	+	awaitTermination(t2);
552	+	assertNotWriteLocked(lock);
553	+	}
554	+
555	+	/**
556	+	* Readlocks succeed only after a writing thread unlocks
557	+	*/
558	+	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
559	+	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
560	+	public void testReadAfterWriteLock(boolean fair) {
561	+	final PublicReentrantReadWriteLock lock =
562	+	new PublicReentrantReadWriteLock(fair);
563	+	lock.writeLock().lock();
564	+	Thread t1 = newStartedThread(new CheckedRunnable() {
565	+	public void realRun() {
566	+	lock.readLock().lock();
567	+	lock.readLock().unlock();
568	+	}});
569	+	Thread t2 = newStartedThread(new CheckedRunnable() {
570	+	public void realRun() {
571	+	lock.readLock().lock();
572	+	lock.readLock().unlock();
573	+	}});
574	+
575	+	waitForQueuedThread(lock, t1);
576	+	waitForQueuedThread(lock, t2);
577	+	releaseWriteLock(lock);
578	+	awaitTermination(t1);
579	+	awaitTermination(t2);
580	+	}
581	+
582	+	/**
583	+	* Read trylock succeeds if write locked by current thread
584	+	*/
585	+	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
586	+	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
587	+	public void testReadHoldingWriteLock(boolean fair) {
588	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
589	+	lock.writeLock().lock();
590	+	assertTrue(lock.readLock().tryLock());
591	+	lock.readLock().unlock();
592	+	lock.writeLock().unlock();
593	+	}
594	+
595	+	/**
596	+	* Read trylock succeeds (barging) even in the presence of waiting
597	+	* readers and/or writers
598	+	*/
599	+	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
600	+	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
601	+	public void testReadTryLockBarging(boolean fair) {
602	+	final PublicReentrantReadWriteLock lock =
603	+	new PublicReentrantReadWriteLock(fair);
604	+	lock.readLock().lock();
605	+
606	+	Thread t1 = newStartedThread(new CheckedRunnable() {
607	+	public void realRun() {
608	+	lock.writeLock().lock();
609	+	lock.writeLock().unlock();
610	+	}});
611	+
612	+	waitForQueuedThread(lock, t1);
613	+
614	+	Thread t2 = newStartedThread(new CheckedRunnable() {
615	+	public void realRun() {
616	+	lock.readLock().lock();
617	+	lock.readLock().unlock();
618	+	}});
619	+
620	+	if (fair)
621	+	waitForQueuedThread(lock, t2);
622	+
623	+	Thread t3 = newStartedThread(new CheckedRunnable() {
624	+	public void realRun() {
625	+	lock.readLock().tryLock();
626	+	lock.readLock().unlock();
627	+	}});
628	+
629	+	assertTrue(lock.getReadLockCount() > 0);
630	+	awaitTermination(t3);
631	+	assertTrue(t1.isAlive());
632	+	if (fair) assertTrue(t2.isAlive());
633	+	lock.readLock().unlock();
634	+	awaitTermination(t1);
635	+	awaitTermination(t2);
636	+	}
637	+
638	+	/**
639	+	* Read lock succeeds if write locked by current thread even if
640	+	* other threads are waiting for readlock
641	+	*/
642	+	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
643	+	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
644	+	public void testReadHoldingWriteLock2(boolean fair) {
645	+	final PublicReentrantReadWriteLock lock =
646	+	new PublicReentrantReadWriteLock(fair);
647	+	lock.writeLock().lock();
648	+	lock.readLock().lock();
649	+	lock.readLock().unlock();
650	+
651	+	Thread t1 = newStartedThread(new CheckedRunnable() {
652	+	public void realRun() {
653	+	lock.readLock().lock();
654	+	lock.readLock().unlock();
655	+	}});
656	+	Thread t2 = newStartedThread(new CheckedRunnable() {
657	+	public void realRun() {
658	+	lock.readLock().lock();
659	+	lock.readLock().unlock();
660	+	}});
661	+
662	+	waitForQueuedThread(lock, t1);
663	+	waitForQueuedThread(lock, t2);
664	+	assertWriteLockedByMoi(lock);
665	+	lock.readLock().lock();
666	+	lock.readLock().unlock();
667	+	releaseWriteLock(lock);
668	+	awaitTermination(t1);
669	+	awaitTermination(t2);
670	+	}
671	+
672	+	/**
673	+	* Read lock succeeds if write locked by current thread even if
674	+	* other threads are waiting for writelock
675	+	*/
676	+	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
677	+	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
678	+	public void testReadHoldingWriteLock3(boolean fair) {
679	+	final PublicReentrantReadWriteLock lock =
680	+	new PublicReentrantReadWriteLock(fair);
681	+	lock.writeLock().lock();
682	+	lock.readLock().lock();
683	+	lock.readLock().unlock();
684	+
685	+	Thread t1 = newStartedThread(new CheckedRunnable() {
686	+	public void realRun() {
687	+	lock.writeLock().lock();
688	+	lock.writeLock().unlock();
689	+	}});
690	+	Thread t2 = newStartedThread(new CheckedRunnable() {
691	+	public void realRun() {
692	+	lock.writeLock().lock();
693	+	lock.writeLock().unlock();
694	+	}});
695	+
696	+	waitForQueuedThread(lock, t1);
697	+	waitForQueuedThread(lock, t2);
698	+	assertWriteLockedByMoi(lock);
699	+	lock.readLock().lock();
700	+	lock.readLock().unlock();
701	+	assertWriteLockedByMoi(lock);
702	+	lock.writeLock().unlock();
703	+	awaitTermination(t1);
704	+	awaitTermination(t2);
705	+	}
706	+
707	+	/**
708	+	* Write lock succeeds if write locked by current thread even if
709	+	* other threads are waiting for writelock
710	+	*/
711	+	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
712	+	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
713	+	public void testWriteHoldingWriteLock4(boolean fair) {
714	+	final PublicReentrantReadWriteLock lock =
715	+	new PublicReentrantReadWriteLock(fair);
716	+	lock.writeLock().lock();
717	+	lock.writeLock().lock();
718	+	lock.writeLock().unlock();
719	+
720	+	Thread t1 = newStartedThread(new CheckedRunnable() {
721	+	public void realRun() {
722	+	lock.writeLock().lock();
723	+	lock.writeLock().unlock();
724	+	}});
725	+	Thread t2 = newStartedThread(new CheckedRunnable() {
726	+	public void realRun() {
727	+	lock.writeLock().lock();
728	+	lock.writeLock().unlock();
729	+	}});
730	+
731	+	waitForQueuedThread(lock, t1);
732	+	waitForQueuedThread(lock, t2);
733	+	assertWriteLockedByMoi(lock);
734	+	assertEquals(1, lock.getWriteHoldCount());
735	+	lock.writeLock().lock();
736	+	assertWriteLockedByMoi(lock);
737	+	assertEquals(2, lock.getWriteHoldCount());
738	+	lock.writeLock().unlock();
739	+	assertWriteLockedByMoi(lock);
740	+	assertEquals(1, lock.getWriteHoldCount());
741	+	lock.writeLock().unlock();
742	+	awaitTermination(t1);
743	+	awaitTermination(t2);
744	+	}
745	+
746	+	/**
747	+	* Read tryLock succeeds if readlocked but not writelocked
748	+	*/
749	+	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
750	+	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
751	+	public void testTryLockWhenReadLocked(boolean fair) {
752	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
753	+	lock.readLock().lock();
754	+	Thread t = newStartedThread(new CheckedRunnable() {
755	+	public void realRun() {
756	+	assertTrue(lock.readLock().tryLock());
757	+	lock.readLock().unlock();
758	+	}});
759	+
760	+	awaitTermination(t);
761	+	lock.readLock().unlock();
762	+	}
763	+
764	+	/**
765	+	* write tryLock fails when readlocked
766	+	*/
767	+	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
768	+	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
769	+	public void testWriteTryLockWhenReadLocked(boolean fair) {
770	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
771	+	lock.readLock().lock();
772	+	Thread t = newStartedThread(new CheckedRunnable() {
773	+	public void realRun() {
774	+	assertFalse(lock.writeLock().tryLock());
775	+	}});
776	+
777	+	awaitTermination(t);
778	+	lock.readLock().unlock();
779	+	}
780	+
781	+	/**
782	+	* write timed tryLock times out if locked
783	+	*/
784	+	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
785	+	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
786	+	public void testWriteTryLock_Timeout(boolean fair) {
787	+	final PublicReentrantReadWriteLock lock =
788	+	new PublicReentrantReadWriteLock(fair);
789	+	lock.writeLock().lock();
790	+	Thread t = newStartedThread(new CheckedRunnable() {
791	+	public void realRun() throws InterruptedException {
792	+	long startTime = System.nanoTime();
793	+	long timeoutMillis = 10;
794	+	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
795	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
796	+	}});
797	+
798	+	awaitTermination(t);
799	+	releaseWriteLock(lock);
800	+	}
801
802	<	public void testLockInterruptibly() {
803	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
804	<	try {
802	>	/**
803	>	* read timed tryLock times out if write-locked
804	>	*/
805	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
806	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
807	>	public void testReadTryLock_Timeout(boolean fair) {
808	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
809	>	lock.writeLock().lock();
810	>	Thread t = newStartedThread(new CheckedRunnable() {
811	>	public void realRun() throws InterruptedException {
812	>	long startTime = System.nanoTime();
813	>	long timeoutMillis = 10;
814	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
815	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
816	>	}});
817	>
818	>	awaitTermination(t);
819	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
820	>	lock.writeLock().unlock();
821	>	}
822	>
823	>	/**
824	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
825	>	*/
826	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
827	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
828	>	public void testWriteLockInterruptibly(boolean fair) {
829	>	final PublicReentrantReadWriteLock lock =
830	>	new PublicReentrantReadWriteLock(fair);
831	>	try {
832		lock.writeLock().lockInterruptibly();
833	<	} catch(Exception e) {
834	<	fail("unexpected exception");
835	<	}
836	<	Thread t = new Thread(new Runnable() {
837	<	public void run() {
838	<	try {
839	<	lock.writeLock().lockInterruptibly();
840	<	threadFail("should throw");
841	<	}
842	<	catch(InterruptedException success) {
843	<	}
334	<	}
335	<	});
336	<	try {
337	<	t.start();
338	<	t.interrupt();
339	<	t.join();
340	<	lock.writeLock().unlock();
341	<	} catch(Exception e){
342	<	fail("unexpected exception");
343	<	}
833	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
834	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
835	>	public void realRun() throws InterruptedException {
836	>	lock.writeLock().lockInterruptibly();
837	>	}});
838	>
839	>	waitForQueuedThread(lock, t);
840	>	t.interrupt();
841	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
842	>	awaitTermination(t);
843	>	releaseWriteLock(lock);
844		}
845
846	<	public void testLockInterruptibly2() {
847	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
848	<	try {
846	>	/**
847	>	* read lockInterruptibly succeeds if lock free else is interruptible
848	>	*/
849	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
850	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
851	>	public void testReadLockInterruptibly(boolean fair) {
852	>	final PublicReentrantReadWriteLock lock =
853	>	new PublicReentrantReadWriteLock(fair);
854	>	try {
855	>	lock.readLock().lockInterruptibly();
856	>	lock.readLock().unlock();
857		lock.writeLock().lockInterruptibly();
858	<	} catch(Exception e) {
859	<	fail("unexpected exception");
860	<	}
861	<	Thread t = new Thread(new Runnable() {
862	<	public void run() {
863	<	try {
864	<	lock.readLock().lockInterruptibly();
865	<	threadFail("should throw");
866	<	}
867	<	catch(InterruptedException success) {
360	<	}
361	<	}
362	<	});
363	<	try {
364	<	t.start();
365	<	t.interrupt();
366	<	t.join();
367	<	lock.writeLock().unlock();
368	<	} catch(Exception e){
369	<	fail("unexpected exception");
370	<	}
858	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
859	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
860	>	public void realRun() throws InterruptedException {
861	>	lock.readLock().lockInterruptibly();
862	>	}});
863	>
864	>	waitForQueuedThread(lock, t);
865	>	t.interrupt();
866	>	awaitTermination(t);
867	>	releaseWriteLock(lock);
868		}
869
870	<	public void testAwait_IllegalMonitor() {
871	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
870	>	/**
871	>	* Calling await without holding lock throws IllegalMonitorStateException
872	>	*/
873	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
874	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
875	>	public void testAwait_IMSE(boolean fair) {
876	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
877		final Condition c = lock.writeLock().newCondition();
878	<	try {
879	<	c.await();
880	<	fail("should throw");
881	<	}
882	<	catch (IllegalMonitorStateException success) {
883	<	}
884	<	catch (Exception ex) {
885	<	fail("should throw IMSE");
878	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
879	>	long startTime = System.nanoTime();
880	>	try {
881	>	await(c, awaitMethod);
882	>	shouldThrow();
883	>	} catch (IllegalMonitorStateException success) {
884	>	} catch (InterruptedException fail) {
885	>	threadUnexpectedException(fail);
886	>	}
887	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
888		}
889		}
890
891	<	public void testSignal_IllegalMonitor() {
892	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
891	>	/**
892	>	* Calling signal without holding lock throws IllegalMonitorStateException
893	>	*/
894	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
895	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
896	>	public void testSignal_IMSE(boolean fair) {
897	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
898		final Condition c = lock.writeLock().newCondition();
899		try {
900		c.signal();
901	<	fail("should throw");
902	<	}
394	<	catch (IllegalMonitorStateException success) {
395	<	}
396	<	catch (Exception ex) {
397	<	fail("should throw IMSE");
398	<	}
901	>	shouldThrow();
902	>	} catch (IllegalMonitorStateException success) {}
903		}
904
905	<	public void testAwaitNanos_Timeout() {
906	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
905	>	/**
906	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
907	>	*/
908	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
909	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
910	>	public void testSignalAll_IMSE(boolean fair) {
911	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
912		final Condition c = lock.writeLock().newCondition();
913		try {
914	+	c.signalAll();
915	+	shouldThrow();
916	+	} catch (IllegalMonitorStateException success) {}
917	+	}
918	+
919	+	/**
920	+	* awaitNanos without a signal times out
921	+	*/
922	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
923	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
924	+	public void testAwaitNanos_Timeout(boolean fair) {
925	+	try {
926	+	final ReentrantReadWriteLock lock =
927	+	new ReentrantReadWriteLock(fair);
928	+	final Condition c = lock.writeLock().newCondition();
929		lock.writeLock().lock();
930	<	long t = c.awaitNanos(100);
931	<	assertTrue(t <= 0);
930	>	long startTime = System.nanoTime();
931	>	long timeoutMillis = 10;
932	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
934	>	assertTrue(nanosRemaining <= 0);
935	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
936		lock.writeLock().unlock();
937	<	}
410	<	catch (Exception ex) {
411	<	fail("unexpected exception");
412	<	}
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938		}
939
940	<	public void testAwait_Timeout() {
941	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
942	<	final Condition c = lock.writeLock().newCondition();
943	<	try {
940	>	/**
941	>	* timed await without a signal times out
942	>	*/
943	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
944	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
945	>	public void testAwait_Timeout(boolean fair) {
946	>	try {
947	>	final ReentrantReadWriteLock lock =
948	>	new ReentrantReadWriteLock(fair);
949	>	final Condition c = lock.writeLock().newCondition();
950		lock.writeLock().lock();
951	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
951	>	long startTime = System.nanoTime();
952	>	long timeoutMillis = 10;
953	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
954	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
955		lock.writeLock().unlock();
956	<	}
423	<	catch (Exception ex) {
424	<	fail("unexpected exception");
425	<	}
956	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
957		}
958
959	<	public void testAwaitUntil_Timeout() {
960	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
961	<	final Condition c = lock.writeLock().newCondition();
962	<	try {
959	>	/**
960	>	* awaitUntil without a signal times out
961	>	*/
962	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
963	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
964	>	public void testAwaitUntil_Timeout(boolean fair) {
965	>	try {
966	>	final ReentrantReadWriteLock lock =
967	>	new ReentrantReadWriteLock(fair);
968	>	final Condition c = lock.writeLock().newCondition();
969		lock.writeLock().lock();
970	+	long startTime = System.nanoTime();
971	+	long timeoutMillis = 10;
972		java.util.Date d = new java.util.Date();
973	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
973	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
974	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
975		lock.writeLock().unlock();
976	<	}
437	<	catch (Exception ex) {
438	<	fail("unexpected exception");
439	<	}
976	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
977		}
978
979	<	public void testAwait() {
980	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
979	>	/**
980	>	* await returns when signalled
981	>	*/
982	>	public void testAwait()      { testAwait(false); }
983	>	public void testAwait_fair() { testAwait(true); }
984	>	public void testAwait(boolean fair) {
985	>	final PublicReentrantReadWriteLock lock =
986	>	new PublicReentrantReadWriteLock(fair);
987		final Condition c = lock.writeLock().newCondition();
988	<	Thread t = new Thread(new Runnable() {
989	<	public void run() {
990	<	try {
991	<	lock.writeLock().lock();
992	<	c.await();
993	<	lock.writeLock().unlock();
994	<	}
995	<	catch(InterruptedException e) {
996	<	threadFail("unexpected exception");
997	<	}
998	<	}
999	<	});
988	>	final CountDownLatch locked = new CountDownLatch(1);
989	>	Thread t = newStartedThread(new CheckedRunnable() {
990	>	public void realRun() throws InterruptedException {
991	>	lock.writeLock().lock();
992	>	locked.countDown();
993	>	c.await();
994	>	lock.writeLock().unlock();
995	>	}});
996	>
997	>	await(locked);
998	>	lock.writeLock().lock();
999	>	assertHasWaiters(lock, c, t);
1000	>	c.signal();
1001	>	assertHasNoWaiters(lock, c);
1002	>	assertTrue(t.isAlive());
1003	>	lock.writeLock().unlock();
1004	>	awaitTermination(t);
1005	>	}
1006
1007	<	try {
1008	<	t.start();
1009	<	Thread.sleep(SHORT_DELAY_MS);
1010	<	lock.writeLock().lock();
1011	<	c.signal();
1012	<	lock.writeLock().unlock();
1013	<	t.join(SHORT_DELAY_MS);
1014	<	assertFalse(t.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	fail("unexpected exception");
1018	<	}
1007	>	/**
1008	>	* awaitUninterruptibly is uninterruptible
1009	>	*/
1010	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1014	>	final Condition c = lock.writeLock().newCondition();
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016	>
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.writeLock().lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	c.awaitUninterruptibly();
1024	>	assertTrue(Thread.interrupted());
1025	>	lock.writeLock().unlock();
1026	>	}});
1027	>
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.writeLock().lock();
1032	>	pleaseInterrupt.countDown();
1033	>	c.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.writeLock().unlock();
1036	>	}});
1037	>
1038	>	await(pleaseInterrupt);
1039	>	lock.writeLock().lock();
1040	>	lock.writeLock().unlock();
1041	>	t2.interrupt();
1042	>
1043	>	assertThreadStaysAlive(t1);
1044	>	assertTrue(t2.isAlive());
1045	>
1046	>	lock.writeLock().lock();
1047	>	c.signalAll();
1048	>	lock.writeLock().unlock();
1049	>
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054	<	public void testAwaitUninterruptibly() {
1055	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1054	>	/**
1055	>	* await/awaitNanos/awaitUntil is interruptible
1056	>	*/
1057	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1058	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1059	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1061	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1063	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1065	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1066	>	final PublicReentrantReadWriteLock lock =
1067	>	new PublicReentrantReadWriteLock(fair);
1068		final Condition c = lock.writeLock().newCondition();
1069	<	Thread t = new Thread(new Runnable() {
1070	<	public void run() {
1071	<	lock.writeLock().lock();
1072	<	c.awaitUninterruptibly();
1069	>	final CountDownLatch locked = new CountDownLatch(1);
1070	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1071	>	public void realRun() throws InterruptedException {
1072	>	lock.writeLock().lock();
1073	>	assertWriteLockedByMoi(lock);
1074	>	assertHasNoWaiters(lock, c);
1075	>	locked.countDown();
1076	>	try {
1077	>	await(c, awaitMethod);
1078	>	} finally {
1079	>	assertWriteLockedByMoi(lock);
1080	>	assertHasNoWaiters(lock, c);
1081		lock.writeLock().unlock();
1082	<	}
1083	<	});
1082	>	assertFalse(Thread.interrupted());
1083	>	}
1084	>	}});
1085	>
1086	>	await(locked);
1087	>	assertHasWaiters(lock, c, t);
1088	>	t.interrupt();
1089	>	awaitTermination(t);
1090	>	assertNotWriteLocked(lock);
1091	>	}
1092	>
1093	>	/**
1094	>	* signalAll wakes up all threads
1095	>	*/
1096	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1097	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1098	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1100	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1102	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1104	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1105	>	final PublicReentrantReadWriteLock lock =
1106	>	new PublicReentrantReadWriteLock(fair);
1107	>	final Condition c = lock.writeLock().newCondition();
1108	>	final CountDownLatch locked = new CountDownLatch(2);
1109	>	final Lock writeLock = lock.writeLock();
1110	>	class Awaiter extends CheckedRunnable {
1111	>	public void realRun() throws InterruptedException {
1112	>	writeLock.lock();
1113	>	locked.countDown();
1114	>	await(c, awaitMethod);
1115	>	writeLock.unlock();
1116	>	}
1117	>	}
1118	>
1119	>	Thread t1 = newStartedThread(new Awaiter());
1120	>	Thread t2 = newStartedThread(new Awaiter());
1121	>
1122	>	await(locked);
1123	>	writeLock.lock();
1124	>	assertHasWaiters(lock, c, t1, t2);
1125	>	c.signalAll();
1126	>	assertHasNoWaiters(lock, c);
1127	>	writeLock.unlock();
1128	>	awaitTermination(t1);
1129	>	awaitTermination(t2);
1130	>	}
1131	>
1132	>	/**
1133	>	* signal wakes up waiting threads in FIFO order
1134	>	*/
1135	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1136	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1137	>	public void testSignalWakesFifo(boolean fair) {
1138	>	final PublicReentrantReadWriteLock lock =
1139	>	new PublicReentrantReadWriteLock(fair);
1140	>	final Condition c = lock.writeLock().newCondition();
1141	>	final CountDownLatch locked1 = new CountDownLatch(1);
1142	>	final CountDownLatch locked2 = new CountDownLatch(1);
1143	>	final Lock writeLock = lock.writeLock();
1144	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1145	>	public void realRun() throws InterruptedException {
1146	>	writeLock.lock();
1147	>	locked1.countDown();
1148	>	c.await();
1149	>	writeLock.unlock();
1150	>	}});
1151	>
1152	>	await(locked1);
1153	>
1154	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1155	>	public void realRun() throws InterruptedException {
1156	>	writeLock.lock();
1157	>	locked2.countDown();
1158	>	c.await();
1159	>	writeLock.unlock();
1160	>	}});
1161	>
1162	>	await(locked2);
1163	>
1164	>	writeLock.lock();
1165	>	assertHasWaiters(lock, c, t1, t2);
1166	>	assertFalse(lock.hasQueuedThreads());
1167	>	c.signal();
1168	>	assertHasWaiters(lock, c, t2);
1169	>	assertTrue(lock.hasQueuedThread(t1));
1170	>	assertFalse(lock.hasQueuedThread(t2));
1171	>	c.signal();
1172	>	assertHasNoWaiters(lock, c);
1173	>	assertTrue(lock.hasQueuedThread(t1));
1174	>	assertTrue(lock.hasQueuedThread(t2));
1175	>	writeLock.unlock();
1176	>	awaitTermination(t1);
1177	>	awaitTermination(t2);
1178	>	}
1179	>
1180	>	/**
1181	>	* await after multiple reentrant locking preserves lock count
1182	>	*/
1183	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1184	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1185	>	public void testAwaitLockCount(boolean fair) {
1186	>	final PublicReentrantReadWriteLock lock =
1187	>	new PublicReentrantReadWriteLock(fair);
1188	>	final Condition c = lock.writeLock().newCondition();
1189	>	final CountDownLatch locked = new CountDownLatch(2);
1190	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1191	>	public void realRun() throws InterruptedException {
1192	>	lock.writeLock().lock();
1193	>	assertWriteLockedByMoi(lock);
1194	>	assertEquals(1, lock.writeLock().getHoldCount());
1195	>	locked.countDown();
1196	>	c.await();
1197	>	assertWriteLockedByMoi(lock);
1198	>	assertEquals(1, lock.writeLock().getHoldCount());
1199	>	lock.writeLock().unlock();
1200	>	}});
1201	>
1202	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1203	>	public void realRun() throws InterruptedException {
1204	>	lock.writeLock().lock();
1205	>	lock.writeLock().lock();
1206	>	assertWriteLockedByMoi(lock);
1207	>	assertEquals(2, lock.writeLock().getHoldCount());
1208	>	locked.countDown();
1209	>	c.await();
1210	>	assertWriteLockedByMoi(lock);
1211	>	assertEquals(2, lock.writeLock().getHoldCount());
1212	>	lock.writeLock().unlock();
1213	>	lock.writeLock().unlock();
1214	>	}});
1215	>
1216	>	await(locked);
1217	>	lock.writeLock().lock();
1218	>	assertHasWaiters(lock, c, t1, t2);
1219	>	c.signalAll();
1220	>	assertHasNoWaiters(lock, c);
1221	>	lock.writeLock().unlock();
1222	>	awaitTermination(t1);
1223	>	awaitTermination(t2);
1224	>	}
1225	>
1226	>	/**
1227	>	* A serialized lock deserializes as unlocked
1228	>	*/
1229	>	public void testSerialization()      { testSerialization(false); }
1230	>	public void testSerialization_fair() { testSerialization(true); }
1231	>	public void testSerialization(boolean fair) {
1232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1233	>	lock.writeLock().lock();
1234	>	lock.readLock().lock();
1235	>
1236	>	ReentrantReadWriteLock clone = serialClone(lock);
1237	>	assertEquals(lock.isFair(), clone.isFair());
1238	>	assertTrue(lock.isWriteLocked());
1239	>	assertFalse(clone.isWriteLocked());
1240	>	assertEquals(1, lock.getReadLockCount());
1241	>	assertEquals(0, clone.getReadLockCount());
1242	>	clone.writeLock().lock();
1243	>	clone.readLock().lock();
1244	>	assertTrue(clone.isWriteLocked());
1245	>	assertEquals(1, clone.getReadLockCount());
1246	>	clone.readLock().unlock();
1247	>	clone.writeLock().unlock();
1248	>	assertFalse(clone.isWriteLocked());
1249	>	assertEquals(1, lock.getReadLockCount());
1250	>	assertEquals(0, clone.getReadLockCount());
1251	>	}
1252	>
1253	>	/**
1254	>	* hasQueuedThreads reports whether there are waiting threads
1255	>	*/
1256	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1257	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1258	>	public void testHasQueuedThreads(boolean fair) {
1259	>	final PublicReentrantReadWriteLock lock =
1260	>	new PublicReentrantReadWriteLock(fair);
1261	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1262	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1263	>	assertFalse(lock.hasQueuedThreads());
1264	>	lock.writeLock().lock();
1265	>	assertFalse(lock.hasQueuedThreads());
1266	>	t1.start();
1267	>	waitForQueuedThread(lock, t1);
1268	>	assertTrue(lock.hasQueuedThreads());
1269	>	t2.start();
1270	>	waitForQueuedThread(lock, t2);
1271	>	assertTrue(lock.hasQueuedThreads());
1272	>	t1.interrupt();
1273	>	awaitTermination(t1);
1274	>	assertTrue(lock.hasQueuedThreads());
1275	>	lock.writeLock().unlock();
1276	>	awaitTermination(t2);
1277	>	assertFalse(lock.hasQueuedThreads());
1278	>	}
1279	>
1280	>	/**
1281	>	* hasQueuedThread(null) throws NPE
1282	>	*/
1283	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1284	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1285	>	public void testHasQueuedThreadNPE(boolean fair) {
1286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1287	>	try {
1288	>	lock.hasQueuedThread(null);
1289	>	shouldThrow();
1290	>	} catch (NullPointerException success) {}
1291	>	}
1292	>
1293	>	/**
1294	>	* hasQueuedThread reports whether a thread is queued
1295	>	*/
1296	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1297	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1298	>	public void testHasQueuedThread(boolean fair) {
1299	>	final PublicReentrantReadWriteLock lock =
1300	>	new PublicReentrantReadWriteLock(fair);
1301	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1302	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1303	>	assertFalse(lock.hasQueuedThread(t1));
1304	>	assertFalse(lock.hasQueuedThread(t2));
1305	>	lock.writeLock().lock();
1306	>	t1.start();
1307	>	waitForQueuedThread(lock, t1);
1308	>	assertTrue(lock.hasQueuedThread(t1));
1309	>	assertFalse(lock.hasQueuedThread(t2));
1310	>	t2.start();
1311	>	waitForQueuedThread(lock, t2);
1312	>	assertTrue(lock.hasQueuedThread(t1));
1313	>	assertTrue(lock.hasQueuedThread(t2));
1314	>	t1.interrupt();
1315	>	awaitTermination(t1);
1316	>	assertFalse(lock.hasQueuedThread(t1));
1317	>	assertTrue(lock.hasQueuedThread(t2));
1318	>	lock.writeLock().unlock();
1319	>	awaitTermination(t2);
1320	>	assertFalse(lock.hasQueuedThread(t1));
1321	>	assertFalse(lock.hasQueuedThread(t2));
1322	>	}
1323	>
1324	>	/**
1325	>	* getQueueLength reports number of waiting threads
1326	>	*/
1327	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1328	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1329	>	public void testGetQueueLength(boolean fair) {
1330	>	final PublicReentrantReadWriteLock lock =
1331	>	new PublicReentrantReadWriteLock(fair);
1332	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1333	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1334	>	assertEquals(0, lock.getQueueLength());
1335	>	lock.writeLock().lock();
1336	>	t1.start();
1337	>	waitForQueuedThread(lock, t1);
1338	>	assertEquals(1, lock.getQueueLength());
1339	>	t2.start();
1340	>	waitForQueuedThread(lock, t2);
1341	>	assertEquals(2, lock.getQueueLength());
1342	>	t1.interrupt();
1343	>	awaitTermination(t1);
1344	>	assertEquals(1, lock.getQueueLength());
1345	>	lock.writeLock().unlock();
1346	>	awaitTermination(t2);
1347	>	assertEquals(0, lock.getQueueLength());
1348	>	}
1349	>
1350	>	/**
1351	>	* getQueuedThreads includes waiting threads
1352	>	*/
1353	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1354	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1355	>	public void testGetQueuedThreads(boolean fair) {
1356	>	final PublicReentrantReadWriteLock lock =
1357	>	new PublicReentrantReadWriteLock(fair);
1358	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1359	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1360	>	assertTrue(lock.getQueuedThreads().isEmpty());
1361	>	lock.writeLock().lock();
1362	>	assertTrue(lock.getQueuedThreads().isEmpty());
1363	>	t1.start();
1364	>	waitForQueuedThread(lock, t1);
1365	>	assertEquals(1, lock.getQueuedThreads().size());
1366	>	assertTrue(lock.getQueuedThreads().contains(t1));
1367	>	t2.start();
1368	>	waitForQueuedThread(lock, t2);
1369	>	assertEquals(2, lock.getQueuedThreads().size());
1370	>	assertTrue(lock.getQueuedThreads().contains(t1));
1371	>	assertTrue(lock.getQueuedThreads().contains(t2));
1372	>	t1.interrupt();
1373	>	awaitTermination(t1);
1374	>	assertFalse(lock.getQueuedThreads().contains(t1));
1375	>	assertTrue(lock.getQueuedThreads().contains(t2));
1376	>	assertEquals(1, lock.getQueuedThreads().size());
1377	>	lock.writeLock().unlock();
1378	>	awaitTermination(t2);
1379	>	assertTrue(lock.getQueuedThreads().isEmpty());
1380	>	}
1381	>
1382	>	/**
1383	>	* hasWaiters throws NPE if null
1384	>	*/
1385	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1386	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1387	>	public void testHasWaitersNPE(boolean fair) {
1388	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1389	>	try {
1390	>	lock.hasWaiters(null);
1391	>	shouldThrow();
1392	>	} catch (NullPointerException success) {}
1393	>	}
1394	>
1395	>	/**
1396	>	* getWaitQueueLength throws NPE if null
1397	>	*/
1398	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1399	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1400	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1401	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1402	>	try {
1403	>	lock.getWaitQueueLength(null);
1404	>	shouldThrow();
1405	>	} catch (NullPointerException success) {}
1406	>	}
1407
1408	+	/**
1409	+	* getWaitingThreads throws NPE if null
1410	+	*/
1411	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1412	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1413	+	public void testGetWaitingThreadsNPE(boolean fair) {
1414	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1415	+	try {
1416	+	lock.getWaitingThreads(null);
1417	+	shouldThrow();
1418	+	} catch (NullPointerException success) {}
1419	+	}
1420	+
1421	+	/**
1422	+	* hasWaiters throws IllegalArgumentException if not owned
1423	+	*/
1424	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1425	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1426	+	public void testHasWaitersIAE(boolean fair) {
1427	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1428	+	final Condition c = lock.writeLock().newCondition();
1429	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1430		try {
1431	<	t.start();
1432	<	Thread.sleep(SHORT_DELAY_MS);
1433	<	t.interrupt();
487	<	lock.writeLock().lock();
488	<	c.signal();
489	<	lock.writeLock().unlock();
490	<	t.join(SHORT_DELAY_MS);
491	<	assertFalse(t.isAlive());
492	<	}
493	<	catch (Exception ex) {
494	<	fail("unexpected exception");
495	<	}
1431	>	lock2.hasWaiters(c);
1432	>	shouldThrow();
1433	>	} catch (IllegalArgumentException success) {}
1434		}
1435
1436	<	public void testAwait_Interrupt() {
1437	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1438	<	final Condition c = lock.writeLock().newCondition();
1439	<	Thread t = new Thread(new Runnable() {
1440	<	public void run() {
1441	<	try {
1442	<	lock.writeLock().lock();
1443	<	c.await();
1444	<	lock.writeLock().unlock();
1445	<	threadFail("should throw");
1446	<	}
1447	<	catch(InterruptedException success) {
510	<	}
511	<	}
512	<	});
513	<
514	<	try {
515	<	t.start();
516	<	Thread.sleep(SHORT_DELAY_MS);
517	<	t.interrupt();
518	<	t.join(SHORT_DELAY_MS);
519	<	assertFalse(t.isAlive());
520	<	}
521	<	catch (Exception ex) {
522	<	fail("unexpected exception");
523	<	}
524	<	}
525	<
526	<	public void testAwaitNanos_Interrupt() {
527	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
528	<	final Condition c = lock.writeLock().newCondition();
529	<	Thread t = new Thread(new Runnable() {
530	<	public void run() {
531	<	try {
532	<	lock.writeLock().lock();
533	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
534	<	lock.writeLock().unlock();
535	<	threadFail("should throw");
536	<	}
537	<	catch(InterruptedException success) {
538	<	}
539	<	}
540	<	});
541	<
542	<	try {
543	<	t.start();
544	<	Thread.sleep(SHORT_DELAY_MS);
545	<	t.interrupt();
546	<	t.join(SHORT_DELAY_MS);
547	<	assertFalse(t.isAlive());
548	<	}
549	<	catch (Exception ex) {
550	<	fail("unexpected exception");
551	<	}
552	<	}
553	<
554	<	public void testAwaitUntil_Interrupt() {
555	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
556	<	final Condition c = lock.writeLock().newCondition();
557	<	Thread t = new Thread(new Runnable() {
558	<	public void run() {
559	<	try {
560	<	lock.writeLock().lock();
561	<	java.util.Date d = new java.util.Date();
562	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
563	<	lock.writeLock().unlock();
564	<	threadFail("should throw");
565	<	}
566	<	catch(InterruptedException success) {
567	<	}
568	<	}
569	<	});
570	<
571	<	try {
572	<	t.start();
573	<	Thread.sleep(SHORT_DELAY_MS);
574	<	t.interrupt();
575	<	t.join(SHORT_DELAY_MS);
576	<	assertFalse(t.isAlive());
577	<	}
578	<	catch (Exception ex) {
579	<	fail("unexpected exception");
580	<	}
581	<	}
582	<
583	<	public void testSignalAll() {
584	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
585	<	final Condition c = lock.writeLock().newCondition();
586	<	Thread t1 = new Thread(new Runnable() {
587	<	public void run() {
588	<	try {
589	<	lock.writeLock().lock();
590	<	c.await();
591	<	lock.writeLock().unlock();
592	<	}
593	<	catch(InterruptedException e) {
594	<	threadFail("unexpected exception");
595	<	}
596	<	}
597	<	});
598	<
599	<	Thread t2 = new Thread(new Runnable() {
600	<	public void run() {
601	<	try {
602	<	lock.writeLock().lock();
603	<	c.await();
604	<	lock.writeLock().unlock();
605	<	}
606	<	catch(InterruptedException e) {
607	<	threadFail("unexpected exception");
608	<	}
609	<	}
610	<	});
611	<
612	<	try {
613	<	t1.start();
614	<	t2.start();
615	<	Thread.sleep(SHORT_DELAY_MS);
616	<	lock.writeLock().lock();
617	<	c.signalAll();
618	<	lock.writeLock().unlock();
619	<	t1.join(SHORT_DELAY_MS);
620	<	t2.join(SHORT_DELAY_MS);
621	<	assertFalse(t1.isAlive());
622	<	assertFalse(t2.isAlive());
623	<	}
624	<	catch (Exception ex) {
625	<	fail("unexpected exception");
626	<	}
1436	>	/**
1437	>	* hasWaiters throws IllegalMonitorStateException if not locked
1438	>	*/
1439	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1440	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1441	>	public void testHasWaitersIMSE(boolean fair) {
1442	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1443	>	final Condition c = lock.writeLock().newCondition();
1444	>	try {
1445	>	lock.hasWaiters(c);
1446	>	shouldThrow();
1447	>	} catch (IllegalMonitorStateException success) {}
1448		}
1449
1450	<	public void testSerialization() {
1451	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1452	<	l.readLock().lock();
1453	<	l.readLock().unlock();
1454	<
1455	<	try {
1456	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1457	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1458	<	out.writeObject(l);
1459	<	out.close();
1460	<
1461	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1462	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1463	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1464	<	r.readLock().lock();
1465	<	r.readLock().unlock();
1466	<	} catch(Exception e){
1467	<	e.printStackTrace();
1468	<	fail("unexpected exception");
1469	<	}
1450	>	/**
1451	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1452	>	*/
1453	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1454	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1455	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1456	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1457	>	final Condition c = lock.writeLock().newCondition();
1458	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1459	>	try {
1460	>	lock2.getWaitQueueLength(c);
1461	>	shouldThrow();
1462	>	} catch (IllegalArgumentException success) {}
1463	>	}
1464	>
1465	>	/**
1466	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1467	>	*/
1468	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1469	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1470	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1471	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1472	>	final Condition c = lock.writeLock().newCondition();
1473	>	try {
1474	>	lock.getWaitQueueLength(c);
1475	>	shouldThrow();
1476	>	} catch (IllegalMonitorStateException success) {}
1477	>	}
1478	>
1479	>	/**
1480	>	* getWaitingThreads throws IllegalArgumentException if not owned
1481	>	*/
1482	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1483	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1484	>	public void testGetWaitingThreadsIAE(boolean fair) {
1485	>	final PublicReentrantReadWriteLock lock =
1486	>	new PublicReentrantReadWriteLock(fair);
1487	>	final Condition c = lock.writeLock().newCondition();
1488	>	final PublicReentrantReadWriteLock lock2 =
1489	>	new PublicReentrantReadWriteLock(fair);
1490	>	try {
1491	>	lock2.getWaitingThreads(c);
1492	>	shouldThrow();
1493	>	} catch (IllegalArgumentException success) {}
1494	>	}
1495	>
1496	>	/**
1497	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1498	>	*/
1499	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1500	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1501	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1502	>	final PublicReentrantReadWriteLock lock =
1503	>	new PublicReentrantReadWriteLock(fair);
1504	>	final Condition c = lock.writeLock().newCondition();
1505	>	try {
1506	>	lock.getWaitingThreads(c);
1507	>	shouldThrow();
1508	>	} catch (IllegalMonitorStateException success) {}
1509	>	}
1510	>
1511	>	/**
1512	>	* hasWaiters returns true when a thread is waiting, else false
1513	>	*/
1514	>	public void testHasWaiters()      { testHasWaiters(false); }
1515	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1516	>	public void testHasWaiters(boolean fair) {
1517	>	final PublicReentrantReadWriteLock lock =
1518	>	new PublicReentrantReadWriteLock(fair);
1519	>	final Condition c = lock.writeLock().newCondition();
1520	>	final CountDownLatch locked = new CountDownLatch(1);
1521	>	Thread t = newStartedThread(new CheckedRunnable() {
1522	>	public void realRun() throws InterruptedException {
1523	>	lock.writeLock().lock();
1524	>	assertHasNoWaiters(lock, c);
1525	>	assertFalse(lock.hasWaiters(c));
1526	>	locked.countDown();
1527	>	c.await();
1528	>	assertHasNoWaiters(lock, c);
1529	>	assertFalse(lock.hasWaiters(c));
1530	>	lock.writeLock().unlock();
1531	>	}});
1532	>
1533	>	await(locked);
1534	>	lock.writeLock().lock();
1535	>	assertHasWaiters(lock, c, t);
1536	>	assertTrue(lock.hasWaiters(c));
1537	>	c.signal();
1538	>	assertHasNoWaiters(lock, c);
1539	>	assertFalse(lock.hasWaiters(c));
1540	>	lock.writeLock().unlock();
1541	>	awaitTermination(t);
1542	>	assertHasNoWaiters(lock, c);
1543		}
1544
1545	+	/**
1546	+	* getWaitQueueLength returns number of waiting threads
1547	+	*/
1548	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1549	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1550	+	public void testGetWaitQueueLength(boolean fair) {
1551	+	final PublicReentrantReadWriteLock lock =
1552	+	new PublicReentrantReadWriteLock(fair);
1553	+	final Condition c = lock.writeLock().newCondition();
1554	+	final CountDownLatch locked = new CountDownLatch(1);
1555	+	Thread t = newStartedThread(new CheckedRunnable() {
1556	+	public void realRun() throws InterruptedException {
1557	+	lock.writeLock().lock();
1558	+	assertEquals(0, lock.getWaitQueueLength(c));
1559	+	locked.countDown();
1560	+	c.await();
1561	+	lock.writeLock().unlock();
1562	+	}});
1563	+
1564	+	await(locked);
1565	+	lock.writeLock().lock();
1566	+	assertHasWaiters(lock, c, t);
1567	+	assertEquals(1, lock.getWaitQueueLength(c));
1568	+	c.signal();
1569	+	assertHasNoWaiters(lock, c);
1570	+	assertEquals(0, lock.getWaitQueueLength(c));
1571	+	lock.writeLock().unlock();
1572	+	awaitTermination(t);
1573	+	}
1574	+
1575	+	/**
1576	+	* getWaitingThreads returns only and all waiting threads
1577	+	*/
1578	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1579	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1580	+	public void testGetWaitingThreads(boolean fair) {
1581	+	final PublicReentrantReadWriteLock lock =
1582	+	new PublicReentrantReadWriteLock(fair);
1583	+	final Condition c = lock.writeLock().newCondition();
1584	+	final CountDownLatch locked1 = new CountDownLatch(1);
1585	+	final CountDownLatch locked2 = new CountDownLatch(1);
1586	+	Thread t1 = new Thread(new CheckedRunnable() {
1587	+	public void realRun() throws InterruptedException {
1588	+	lock.writeLock().lock();
1589	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1590	+	locked1.countDown();
1591	+	c.await();
1592	+	lock.writeLock().unlock();
1593	+	}});
1594	+
1595	+	Thread t2 = new Thread(new CheckedRunnable() {
1596	+	public void realRun() throws InterruptedException {
1597	+	lock.writeLock().lock();
1598	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1599	+	locked2.countDown();
1600	+	c.await();
1601	+	lock.writeLock().unlock();
1602	+	}});
1603	+
1604	+	lock.writeLock().lock();
1605	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1606	+	lock.writeLock().unlock();
1607	+
1608	+	t1.start();
1609	+	await(locked1);
1610	+	t2.start();
1611	+	await(locked2);
1612	+
1613	+	lock.writeLock().lock();
1614	+	assertTrue(lock.hasWaiters(c));
1615	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1616	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1617	+	assertEquals(2, lock.getWaitingThreads(c).size());
1618	+	c.signalAll();
1619	+	assertHasNoWaiters(lock, c);
1620	+	lock.writeLock().unlock();
1621	+
1622	+	awaitTermination(t1);
1623	+	awaitTermination(t2);
1624	+
1625	+	assertHasNoWaiters(lock, c);
1626	+	}
1627	+
1628	+	/**
1629	+	* toString indicates current lock state
1630	+	*/
1631	+	public void testToString()      { testToString(false); }
1632	+	public void testToString_fair() { testToString(true); }
1633	+	public void testToString(boolean fair) {
1634	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1635	+	assertTrue(lock.toString().contains("Write locks = 0"));
1636	+	assertTrue(lock.toString().contains("Read locks = 0"));
1637	+	lock.writeLock().lock();
1638	+	assertTrue(lock.toString().contains("Write locks = 1"));
1639	+	assertTrue(lock.toString().contains("Read locks = 0"));
1640	+	lock.writeLock().unlock();
1641	+	lock.readLock().lock();
1642	+	lock.readLock().lock();
1643	+	assertTrue(lock.toString().contains("Write locks = 0"));
1644	+	assertTrue(lock.toString().contains("Read locks = 2"));
1645	+	}
1646	+
1647	+	/**
1648	+	* readLock.toString indicates current lock state
1649	+	*/
1650	+	public void testReadLockToString()      { testReadLockToString(false); }
1651	+	public void testReadLockToString_fair() { testReadLockToString(true); }
1652	+	public void testReadLockToString(boolean fair) {
1653	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1654	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1655	+	lock.readLock().lock();
1656	+	lock.readLock().lock();
1657	+	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1658	+	}
1659	+
1660	+	/**
1661	+	* writeLock.toString indicates current lock state
1662	+	*/
1663	+	public void testWriteLockToString()      { testWriteLockToString(false); }
1664	+	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1665	+	public void testWriteLockToString(boolean fair) {
1666	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1667	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1668	+	lock.writeLock().lock();
1669	+	assertTrue(lock.writeLock().toString().contains("Locked"));
1670	+	lock.writeLock().unlock();
1671	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672	+	}
1673
1674		}

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