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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 1.70 by jsr166, Wed Dec 31 20:34:16 2014 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
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	>	junit.textui.TestRunner.run(suite());
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	<	}
253	<	}
299	>	shouldThrow();
300	>	} catch (IllegalMonitorStateException success) {}
301	>	}
302
303	<
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	<	public void testWriteTryLockWhenReadLocked() {
324	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
325	<	lock.readLock().lock();
326	<	Thread t = new Thread(new Runnable() {
327	<	public void run(){
328	<	threadAssertFalse(lock.writeLock().tryLock());
329	<	}
330	<	});
331	<	try {
332	<	t.start();
333	<	t.join();
334	<	lock.readLock().unlock();
335	<	} catch(Exception e){
336	<	fail("unexpected exception");
337	<	}
338	<	}
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	<
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	<	public void testTryLock_Timeout(){
364	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
365	<	lock.writeLock().lock();
366	<	Thread t = new Thread(new Runnable() {
367	<	public void run(){
368	<	try {
369	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
370	<	} catch (Exception ex) {
371	<	threadFail("unexpected exception");
372	<	}
373	<	}
374	<	});
375	<	try {
376	<	t.start();
377	<	t.join();
378	<	lock.writeLock().unlock();
379	<	} catch(Exception e){
380	<	fail("unexpected exception");
381	<	}
295	<	}
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_Timeout2(){
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.readLock().tryLock(1, TimeUnit.MILLISECONDS));
390	<	} catch (Exception ex) {
391	<	threadFail("unexpected exception");
392	<	}
393	<	}
394	<	});
395	<	try {
396	<	t.start();
397	<	t.join();
398	<	lock.writeLock().unlock();
399	<	} catch(Exception e){
400	<	fail("unexpected exception");
401	<	}
402	<	}
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	>	/**
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	<	public void testLockInterruptibly() {
518	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
519	<	try {
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	>	/**
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");
325	<	}
326	<	Thread t = new Thread(new Runnable() {
327	<	public void run() {
328	<	try {
329	<	lock.writeLock().lockInterruptibly();
330	<	threadFail("should throw");
331	<	}
332	<	catch(InterruptedException success) {
333	<	}
334	<	}
335	<	});
336	<	try {
337	<	t.start();
338	<	t.interrupt();
339	<	t.join();
340	<	lock.writeLock().unlock();
341	<	} catch(Exception e){
342	<	fail("unexpected exception");
833	>	} catch (InterruptedException ie) {
834	>	threadUnexpectedException(ie);
835		}
836	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
837	+	public void realRun() throws InterruptedException {
838	+	lock.writeLock().lockInterruptibly();
839	+	}});
840	+
841	+	waitForQueuedThread(lock, t);
842	+	t.interrupt();
843	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
844	+	awaitTermination(t);
845	+	releaseWriteLock(lock);
846		}
847
848	<	public void testLockInterruptibly2() {
849	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
850	<	try {
848	>	/**
849	>	* read lockInterruptibly succeeds if lock free else is interruptible
850	>	*/
851	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
852	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
853	>	public void testReadLockInterruptibly(boolean fair) {
854	>	final PublicReentrantReadWriteLock lock =
855	>	new PublicReentrantReadWriteLock(fair);
856	>	try {
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859		lock.writeLock().lockInterruptibly();
860	<	} catch(Exception e) {
861	<	fail("unexpected exception");
352	<	}
353	<	Thread t = new Thread(new Runnable() {
354	<	public void run() {
355	<	try {
356	<	lock.readLock().lockInterruptibly();
357	<	threadFail("should throw");
358	<	}
359	<	catch(InterruptedException success) {
360	<	}
361	<	}
362	<	});
363	<	try {
364	<	t.start();
365	<	t.interrupt();
366	<	t.join();
367	<	lock.writeLock().unlock();
368	<	} catch(Exception e){
369	<	fail("unexpected exception");
860	>	} catch (InterruptedException ie) {
861	>	threadUnexpectedException(ie);
862		}
863	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
864	+	public void realRun() throws InterruptedException {
865	+	lock.readLock().lockInterruptibly();
866	+	}});
867	+
868	+	waitForQueuedThread(lock, t);
869	+	t.interrupt();
870	+	awaitTermination(t);
871	+	releaseWriteLock(lock);
872		}
873
874	<	public void testAwait_IllegalMonitor() {
875	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
874	>	/**
875	>	* Calling await without holding lock throws IllegalMonitorStateException
876	>	*/
877	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
878	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
879	>	public void testAwait_IMSE(boolean fair) {
880	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
881		final Condition c = lock.writeLock().newCondition();
882	<	try {
883	<	c.await();
884	<	fail("should throw");
885	<	}
886	<	catch (IllegalMonitorStateException success) {
887	<	}
888	<	catch (Exception ex) {
889	<	fail("should throw IMSE");
882	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
883	>	long startTime = System.nanoTime();
884	>	try {
885	>	await(c, awaitMethod);
886	>	shouldThrow();
887	>	} catch (IllegalMonitorStateException success) {
888	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
889	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
890		}
891		}
892
893	<	public void testSignal_IllegalMonitor() {
894	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
893	>	/**
894	>	* Calling signal without holding lock throws IllegalMonitorStateException
895	>	*/
896	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
897	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
898	>	public void testSignal_IMSE(boolean fair) {
899	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
900		final Condition c = lock.writeLock().newCondition();
901		try {
902		c.signal();
903	<	fail("should throw");
904	<	}
394	<	catch (IllegalMonitorStateException success) {
395	<	}
396	<	catch (Exception ex) {
397	<	fail("should throw IMSE");
398	<	}
903	>	shouldThrow();
904	>	} catch (IllegalMonitorStateException success) {}
905		}
906
907	<	public void testAwaitNanos_Timeout() {
908	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
907	>	/**
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909	>	*/
910	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
911	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
912	>	public void testSignalAll_IMSE(boolean fair) {
913	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
914		final Condition c = lock.writeLock().newCondition();
915		try {
916	+	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) {
411	<	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) {
424	<	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) {
438	<	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	<	threadFail("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 is uninterruptible
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 pleaseInterrupt = new CountDownLatch(2);
1024	>
1025	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1026	>	public void realRun() {
1027	>	// Interrupt before awaitUninterruptibly
1028	>	lock.writeLock().lock();
1029	>	pleaseInterrupt.countDown();
1030	>	Thread.currentThread().interrupt();
1031	>	c.awaitUninterruptibly();
1032	>	assertTrue(Thread.interrupted());
1033	>	lock.writeLock().unlock();
1034	>	}});
1035	>
1036	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1037	>	public void realRun() {
1038	>	// Interrupt during awaitUninterruptibly
1039	>	lock.writeLock().lock();
1040	>	pleaseInterrupt.countDown();
1041	>	c.awaitUninterruptibly();
1042	>	assertTrue(Thread.interrupted());
1043	>	lock.writeLock().unlock();
1044	>	}});
1045	>
1046	>	await(pleaseInterrupt);
1047	>	lock.writeLock().lock();
1048	>	lock.writeLock().unlock();
1049	>	t2.interrupt();
1050	>
1051	>	assertThreadStaysAlive(t1);
1052	>	assertTrue(t2.isAlive());
1053	>
1054	>	lock.writeLock().lock();
1055	>	c.signalAll();
1056	>	lock.writeLock().unlock();
1057	>
1058	>	awaitTermination(t1);
1059	>	awaitTermination(t2);
1060		}
1061
1062	<	public void testAwaitUninterruptibly() {
1063	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1062	>	/**
1063	>	* await/awaitNanos/awaitUntil is interruptible
1064	>	*/
1065	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1066	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1067	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1068	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1069	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1070	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1071	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1072	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1073	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1074	>	final PublicReentrantReadWriteLock lock =
1075	>	new PublicReentrantReadWriteLock(fair);
1076		final Condition c = lock.writeLock().newCondition();
1077	<	Thread t = new Thread(new Runnable() {
1078	<	public void run() {
1079	<	lock.writeLock().lock();
1080	<	c.awaitUninterruptibly();
1077	>	final CountDownLatch locked = new CountDownLatch(1);
1078	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1079	>	public void realRun() throws InterruptedException {
1080	>	lock.writeLock().lock();
1081	>	assertWriteLockedByMoi(lock);
1082	>	assertHasNoWaiters(lock, c);
1083	>	locked.countDown();
1084	>	try {
1085	>	await(c, awaitMethod);
1086	>	} finally {
1087	>	assertWriteLockedByMoi(lock);
1088	>	assertHasNoWaiters(lock, c);
1089		lock.writeLock().unlock();
1090	<	}
1091	<	});
1090	>	assertFalse(Thread.interrupted());
1091	>	}
1092	>	}});
1093	>
1094	>	await(locked);
1095	>	assertHasWaiters(lock, c, t);
1096	>	t.interrupt();
1097	>	awaitTermination(t);
1098	>	assertNotWriteLocked(lock);
1099	>	}
1100	>
1101	>	/**
1102	>	* signalAll wakes up all threads
1103	>	*/
1104	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1105	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1106	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1107	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1108	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1109	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1110	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1111	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1112	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1113	>	final PublicReentrantReadWriteLock lock =
1114	>	new PublicReentrantReadWriteLock(fair);
1115	>	final Condition c = lock.writeLock().newCondition();
1116	>	final CountDownLatch locked = new CountDownLatch(2);
1117	>	final Lock writeLock = lock.writeLock();
1118	>	class Awaiter extends CheckedRunnable {
1119	>	public void realRun() throws InterruptedException {
1120	>	writeLock.lock();
1121	>	locked.countDown();
1122	>	await(c, awaitMethod);
1123	>	writeLock.unlock();
1124	>	}
1125	>	}
1126	>
1127	>	Thread t1 = newStartedThread(new Awaiter());
1128	>	Thread t2 = newStartedThread(new Awaiter());
1129	>
1130	>	await(locked);
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	c.signalAll();
1134	>	assertHasNoWaiters(lock, c);
1135	>	writeLock.unlock();
1136	>	awaitTermination(t1);
1137	>	awaitTermination(t2);
1138	>	}
1139	>
1140	>	/**
1141	>	* signal wakes up waiting threads in FIFO order
1142	>	*/
1143	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1144	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1145	>	public void testSignalWakesFifo(boolean fair) {
1146	>	final PublicReentrantReadWriteLock lock =
1147	>	new PublicReentrantReadWriteLock(fair);
1148	>	final Condition c = lock.writeLock().newCondition();
1149	>	final CountDownLatch locked1 = new CountDownLatch(1);
1150	>	final CountDownLatch locked2 = new CountDownLatch(1);
1151	>	final Lock writeLock = lock.writeLock();
1152	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1153	>	public void realRun() throws InterruptedException {
1154	>	writeLock.lock();
1155	>	locked1.countDown();
1156	>	c.await();
1157	>	writeLock.unlock();
1158	>	}});
1159	>
1160	>	await(locked1);
1161	>
1162	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1163	>	public void realRun() throws InterruptedException {
1164	>	writeLock.lock();
1165	>	locked2.countDown();
1166	>	c.await();
1167	>	writeLock.unlock();
1168	>	}});
1169	>
1170	>	await(locked2);
1171	>
1172	>	writeLock.lock();
1173	>	assertHasWaiters(lock, c, t1, t2);
1174	>	assertFalse(lock.hasQueuedThreads());
1175	>	c.signal();
1176	>	assertHasWaiters(lock, c, t2);
1177	>	assertTrue(lock.hasQueuedThread(t1));
1178	>	assertFalse(lock.hasQueuedThread(t2));
1179	>	c.signal();
1180	>	assertHasNoWaiters(lock, c);
1181	>	assertTrue(lock.hasQueuedThread(t1));
1182	>	assertTrue(lock.hasQueuedThread(t2));
1183	>	writeLock.unlock();
1184	>	awaitTermination(t1);
1185	>	awaitTermination(t2);
1186	>	}
1187	>
1188	>	/**
1189	>	* await after multiple reentrant locking preserves lock count
1190	>	*/
1191	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1192	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1193	>	public void testAwaitLockCount(boolean fair) {
1194	>	final PublicReentrantReadWriteLock lock =
1195	>	new PublicReentrantReadWriteLock(fair);
1196	>	final Condition c = lock.writeLock().newCondition();
1197	>	final CountDownLatch locked = new CountDownLatch(2);
1198	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1199	>	public void realRun() throws InterruptedException {
1200	>	lock.writeLock().lock();
1201	>	assertWriteLockedByMoi(lock);
1202	>	assertEquals(1, lock.writeLock().getHoldCount());
1203	>	locked.countDown();
1204	>	c.await();
1205	>	assertWriteLockedByMoi(lock);
1206	>	assertEquals(1, lock.writeLock().getHoldCount());
1207	>	lock.writeLock().unlock();
1208	>	}});
1209	>
1210	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1211	>	public void realRun() throws InterruptedException {
1212	>	lock.writeLock().lock();
1213	>	lock.writeLock().lock();
1214	>	assertWriteLockedByMoi(lock);
1215	>	assertEquals(2, lock.writeLock().getHoldCount());
1216	>	locked.countDown();
1217	>	c.await();
1218	>	assertWriteLockedByMoi(lock);
1219	>	assertEquals(2, lock.writeLock().getHoldCount());
1220	>	lock.writeLock().unlock();
1221	>	lock.writeLock().unlock();
1222	>	}});
1223	>
1224	>	await(locked);
1225	>	lock.writeLock().lock();
1226	>	assertHasWaiters(lock, c, t1, t2);
1227	>	c.signalAll();
1228	>	assertHasNoWaiters(lock, c);
1229	>	lock.writeLock().unlock();
1230	>	awaitTermination(t1);
1231	>	awaitTermination(t2);
1232	>	}
1233	>
1234	>	/**
1235	>	* A serialized lock deserializes as unlocked
1236	>	*/
1237	>	public void testSerialization()      { testSerialization(false); }
1238	>	public void testSerialization_fair() { testSerialization(true); }
1239	>	public void testSerialization(boolean fair) {
1240	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1241	>	lock.writeLock().lock();
1242	>	lock.readLock().lock();
1243	>
1244	>	ReentrantReadWriteLock clone = serialClone(lock);
1245	>	assertEquals(lock.isFair(), clone.isFair());
1246	>	assertTrue(lock.isWriteLocked());
1247	>	assertFalse(clone.isWriteLocked());
1248	>	assertEquals(1, lock.getReadLockCount());
1249	>	assertEquals(0, clone.getReadLockCount());
1250	>	clone.writeLock().lock();
1251	>	clone.readLock().lock();
1252	>	assertTrue(clone.isWriteLocked());
1253	>	assertEquals(1, clone.getReadLockCount());
1254	>	clone.readLock().unlock();
1255	>	clone.writeLock().unlock();
1256	>	assertFalse(clone.isWriteLocked());
1257	>	assertEquals(1, lock.getReadLockCount());
1258	>	assertEquals(0, clone.getReadLockCount());
1259	>	}
1260	>
1261	>	/**
1262	>	* hasQueuedThreads reports whether there are waiting threads
1263	>	*/
1264	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1265	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1266	>	public void testHasQueuedThreads(boolean fair) {
1267	>	final PublicReentrantReadWriteLock lock =
1268	>	new PublicReentrantReadWriteLock(fair);
1269	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1270	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1271	>	assertFalse(lock.hasQueuedThreads());
1272	>	lock.writeLock().lock();
1273	>	assertFalse(lock.hasQueuedThreads());
1274	>	t1.start();
1275	>	waitForQueuedThread(lock, t1);
1276	>	assertTrue(lock.hasQueuedThreads());
1277	>	t2.start();
1278	>	waitForQueuedThread(lock, t2);
1279	>	assertTrue(lock.hasQueuedThreads());
1280	>	t1.interrupt();
1281	>	awaitTermination(t1);
1282	>	assertTrue(lock.hasQueuedThreads());
1283	>	lock.writeLock().unlock();
1284	>	awaitTermination(t2);
1285	>	assertFalse(lock.hasQueuedThreads());
1286	>	}
1287	>
1288	>	/**
1289	>	* hasQueuedThread(null) throws NPE
1290	>	*/
1291	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1292	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1293	>	public void testHasQueuedThreadNPE(boolean fair) {
1294	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1295	>	try {
1296	>	lock.hasQueuedThread(null);
1297	>	shouldThrow();
1298	>	} catch (NullPointerException success) {}
1299	>	}
1300	>
1301	>	/**
1302	>	* hasQueuedThread reports whether a thread is queued
1303	>	*/
1304	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1305	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1306	>	public void testHasQueuedThread(boolean fair) {
1307	>	final PublicReentrantReadWriteLock lock =
1308	>	new PublicReentrantReadWriteLock(fair);
1309	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1310	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1311	>	assertFalse(lock.hasQueuedThread(t1));
1312	>	assertFalse(lock.hasQueuedThread(t2));
1313	>	lock.writeLock().lock();
1314	>	t1.start();
1315	>	waitForQueuedThread(lock, t1);
1316	>	assertTrue(lock.hasQueuedThread(t1));
1317	>	assertFalse(lock.hasQueuedThread(t2));
1318	>	t2.start();
1319	>	waitForQueuedThread(lock, t2);
1320	>	assertTrue(lock.hasQueuedThread(t1));
1321	>	assertTrue(lock.hasQueuedThread(t2));
1322	>	t1.interrupt();
1323	>	awaitTermination(t1);
1324	>	assertFalse(lock.hasQueuedThread(t1));
1325	>	assertTrue(lock.hasQueuedThread(t2));
1326	>	lock.writeLock().unlock();
1327	>	awaitTermination(t2);
1328	>	assertFalse(lock.hasQueuedThread(t1));
1329	>	assertFalse(lock.hasQueuedThread(t2));
1330	>	}
1331
1332	+	/**
1333	+	* getQueueLength reports number of waiting threads
1334	+	*/
1335	+	public void testGetQueueLength()      { testGetQueueLength(false); }
1336	+	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1337	+	public void testGetQueueLength(boolean fair) {
1338	+	final PublicReentrantReadWriteLock lock =
1339	+	new PublicReentrantReadWriteLock(fair);
1340	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1341	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1342	+	assertEquals(0, lock.getQueueLength());
1343	+	lock.writeLock().lock();
1344	+	t1.start();
1345	+	waitForQueuedThread(lock, t1);
1346	+	assertEquals(1, lock.getQueueLength());
1347	+	t2.start();
1348	+	waitForQueuedThread(lock, t2);
1349	+	assertEquals(2, lock.getQueueLength());
1350	+	t1.interrupt();
1351	+	awaitTermination(t1);
1352	+	assertEquals(1, lock.getQueueLength());
1353	+	lock.writeLock().unlock();
1354	+	awaitTermination(t2);
1355	+	assertEquals(0, lock.getQueueLength());
1356	+	}
1357	+
1358	+	/**
1359	+	* getQueuedThreads includes waiting threads
1360	+	*/
1361	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1362	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1363	+	public void testGetQueuedThreads(boolean fair) {
1364	+	final PublicReentrantReadWriteLock lock =
1365	+	new PublicReentrantReadWriteLock(fair);
1366	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1367	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1368	+	assertTrue(lock.getQueuedThreads().isEmpty());
1369	+	lock.writeLock().lock();
1370	+	assertTrue(lock.getQueuedThreads().isEmpty());
1371	+	t1.start();
1372	+	waitForQueuedThread(lock, t1);
1373	+	assertEquals(1, lock.getQueuedThreads().size());
1374	+	assertTrue(lock.getQueuedThreads().contains(t1));
1375	+	t2.start();
1376	+	waitForQueuedThread(lock, t2);
1377	+	assertEquals(2, lock.getQueuedThreads().size());
1378	+	assertTrue(lock.getQueuedThreads().contains(t1));
1379	+	assertTrue(lock.getQueuedThreads().contains(t2));
1380	+	t1.interrupt();
1381	+	awaitTermination(t1);
1382	+	assertFalse(lock.getQueuedThreads().contains(t1));
1383	+	assertTrue(lock.getQueuedThreads().contains(t2));
1384	+	assertEquals(1, lock.getQueuedThreads().size());
1385	+	lock.writeLock().unlock();
1386	+	awaitTermination(t2);
1387	+	assertTrue(lock.getQueuedThreads().isEmpty());
1388	+	}
1389	+
1390	+	/**
1391	+	* hasWaiters throws NPE if null
1392	+	*/
1393	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1394	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1395	+	public void testHasWaitersNPE(boolean fair) {
1396	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1397	+	try {
1398	+	lock.hasWaiters(null);
1399	+	shouldThrow();
1400	+	} catch (NullPointerException success) {}
1401	+	}
1402	+
1403	+	/**
1404	+	* getWaitQueueLength throws NPE if null
1405	+	*/
1406	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1407	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1408	+	public void testGetWaitQueueLengthNPE(boolean fair) {
1409	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1410	+	try {
1411	+	lock.getWaitQueueLength(null);
1412	+	shouldThrow();
1413	+	} catch (NullPointerException success) {}
1414	+	}
1415	+
1416	+	/**
1417	+	* getWaitingThreads throws NPE if null
1418	+	*/
1419	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1420	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1421	+	public void testGetWaitingThreadsNPE(boolean fair) {
1422	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1423	+	try {
1424	+	lock.getWaitingThreads(null);
1425	+	shouldThrow();
1426	+	} catch (NullPointerException success) {}
1427	+	}
1428	+
1429	+	/**
1430	+	* hasWaiters throws IllegalArgumentException if not owned
1431	+	*/
1432	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1433	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1434	+	public void testHasWaitersIAE(boolean fair) {
1435	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1436	+	final Condition c = lock.writeLock().newCondition();
1437	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1438		try {
1439	<	t.start();
1440	<	Thread.sleep(SHORT_DELAY_MS);
1441	<	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	<	}
1439	>	lock2.hasWaiters(c);
1440	>	shouldThrow();
1441	>	} catch (IllegalArgumentException success) {}
1442		}
1443
1444	<	public void testAwait_Interrupt() {
1445	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1446	<	final Condition c = lock.writeLock().newCondition();
1447	<	Thread t = new Thread(new Runnable() {
1448	<	public void run() {
1449	<	try {
1450	<	lock.writeLock().lock();
1451	<	c.await();
1452	<	lock.writeLock().unlock();
1453	<	threadFail("should throw");
1454	<	}
1455	<	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	<	}
1444	>	/**
1445	>	* hasWaiters throws IllegalMonitorStateException if not locked
1446	>	*/
1447	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1448	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1449	>	public void testHasWaitersIMSE(boolean fair) {
1450	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1451	>	final Condition c = lock.writeLock().newCondition();
1452	>	try {
1453	>	lock.hasWaiters(c);
1454	>	shouldThrow();
1455	>	} catch (IllegalMonitorStateException success) {}
1456		}
1457
1458	<	public void testSerialization() {
1459	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1460	<	l.readLock().lock();
1461	<	l.readLock().unlock();
1462	<
1463	<	try {
1464	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1465	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1466	<	out.writeObject(l);
1467	<	out.close();
1468	<
1469	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1470	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1471	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1472	<	r.readLock().lock();
1473	<	r.readLock().unlock();
1474	<	} catch(Exception e){
1475	<	e.printStackTrace();
1476	<	fail("unexpected exception");
1477	<	}
1458	>	/**
1459	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1460	>	*/
1461	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1462	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1463	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1464	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1465	>	final Condition c = lock.writeLock().newCondition();
1466	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1467	>	try {
1468	>	lock2.getWaitQueueLength(c);
1469	>	shouldThrow();
1470	>	} catch (IllegalArgumentException success) {}
1471	>	}
1472	>
1473	>	/**
1474	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1475	>	*/
1476	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1477	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1478	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1479	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1480	>	final Condition c = lock.writeLock().newCondition();
1481	>	try {
1482	>	lock.getWaitQueueLength(c);
1483	>	shouldThrow();
1484	>	} catch (IllegalMonitorStateException success) {}
1485	>	}
1486	>
1487	>	/**
1488	>	* getWaitingThreads throws IllegalArgumentException if not owned
1489	>	*/
1490	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1491	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1492	>	public void testGetWaitingThreadsIAE(boolean fair) {
1493	>	final PublicReentrantReadWriteLock lock =
1494	>	new PublicReentrantReadWriteLock(fair);
1495	>	final Condition c = lock.writeLock().newCondition();
1496	>	final PublicReentrantReadWriteLock lock2 =
1497	>	new PublicReentrantReadWriteLock(fair);
1498	>	try {
1499	>	lock2.getWaitingThreads(c);
1500	>	shouldThrow();
1501	>	} catch (IllegalArgumentException success) {}
1502	>	}
1503	>
1504	>	/**
1505	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1506	>	*/
1507	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1508	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1509	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1510	>	final PublicReentrantReadWriteLock lock =
1511	>	new PublicReentrantReadWriteLock(fair);
1512	>	final Condition c = lock.writeLock().newCondition();
1513	>	try {
1514	>	lock.getWaitingThreads(c);
1515	>	shouldThrow();
1516	>	} catch (IllegalMonitorStateException success) {}
1517		}
1518
1519	+	/**
1520	+	* hasWaiters returns true when a thread is waiting, else false
1521	+	*/
1522	+	public void testHasWaiters()      { testHasWaiters(false); }
1523	+	public void testHasWaiters_fair() { testHasWaiters(true); }
1524	+	public void testHasWaiters(boolean fair) {
1525	+	final PublicReentrantReadWriteLock lock =
1526	+	new PublicReentrantReadWriteLock(fair);
1527	+	final Condition c = lock.writeLock().newCondition();
1528	+	final CountDownLatch locked = new CountDownLatch(1);
1529	+	Thread t = newStartedThread(new CheckedRunnable() {
1530	+	public void realRun() throws InterruptedException {
1531	+	lock.writeLock().lock();
1532	+	assertHasNoWaiters(lock, c);
1533	+	assertFalse(lock.hasWaiters(c));
1534	+	locked.countDown();
1535	+	c.await();
1536	+	assertHasNoWaiters(lock, c);
1537	+	assertFalse(lock.hasWaiters(c));
1538	+	lock.writeLock().unlock();
1539	+	}});
1540	+
1541	+	await(locked);
1542	+	lock.writeLock().lock();
1543	+	assertHasWaiters(lock, c, t);
1544	+	assertTrue(lock.hasWaiters(c));
1545	+	c.signal();
1546	+	assertHasNoWaiters(lock, c);
1547	+	assertFalse(lock.hasWaiters(c));
1548	+	lock.writeLock().unlock();
1549	+	awaitTermination(t);
1550	+	assertHasNoWaiters(lock, c);
1551	+	}
1552	+
1553	+	/**
1554	+	* getWaitQueueLength returns number of waiting threads
1555	+	*/
1556	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1557	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1558	+	public void testGetWaitQueueLength(boolean fair) {
1559	+	final PublicReentrantReadWriteLock lock =
1560	+	new PublicReentrantReadWriteLock(fair);
1561	+	final Condition c = lock.writeLock().newCondition();
1562	+	final CountDownLatch locked = new CountDownLatch(1);
1563	+	Thread t = newStartedThread(new CheckedRunnable() {
1564	+	public void realRun() throws InterruptedException {
1565	+	lock.writeLock().lock();
1566	+	assertEquals(0, lock.getWaitQueueLength(c));
1567	+	locked.countDown();
1568	+	c.await();
1569	+	lock.writeLock().unlock();
1570	+	}});
1571	+
1572	+	await(locked);
1573	+	lock.writeLock().lock();
1574	+	assertHasWaiters(lock, c, t);
1575	+	assertEquals(1, lock.getWaitQueueLength(c));
1576	+	c.signal();
1577	+	assertHasNoWaiters(lock, c);
1578	+	assertEquals(0, lock.getWaitQueueLength(c));
1579	+	lock.writeLock().unlock();
1580	+	awaitTermination(t);
1581	+	}
1582	+
1583	+	/**
1584	+	* getWaitingThreads returns only and all waiting threads
1585	+	*/
1586	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1587	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1588	+	public void testGetWaitingThreads(boolean fair) {
1589	+	final PublicReentrantReadWriteLock lock =
1590	+	new PublicReentrantReadWriteLock(fair);
1591	+	final Condition c = lock.writeLock().newCondition();
1592	+	final CountDownLatch locked1 = new CountDownLatch(1);
1593	+	final CountDownLatch locked2 = new CountDownLatch(1);
1594	+	Thread t1 = new Thread(new CheckedRunnable() {
1595	+	public void realRun() throws InterruptedException {
1596	+	lock.writeLock().lock();
1597	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1598	+	locked1.countDown();
1599	+	c.await();
1600	+	lock.writeLock().unlock();
1601	+	}});
1602	+
1603	+	Thread t2 = new Thread(new CheckedRunnable() {
1604	+	public void realRun() throws InterruptedException {
1605	+	lock.writeLock().lock();
1606	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1607	+	locked2.countDown();
1608	+	c.await();
1609	+	lock.writeLock().unlock();
1610	+	}});
1611	+
1612	+	lock.writeLock().lock();
1613	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1614	+	lock.writeLock().unlock();
1615	+
1616	+	t1.start();
1617	+	await(locked1);
1618	+	t2.start();
1619	+	await(locked2);
1620	+
1621	+	lock.writeLock().lock();
1622	+	assertTrue(lock.hasWaiters(c));
1623	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1624	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1625	+	assertEquals(2, lock.getWaitingThreads(c).size());
1626	+	c.signalAll();
1627	+	assertHasNoWaiters(lock, c);
1628	+	lock.writeLock().unlock();
1629	+
1630	+	awaitTermination(t1);
1631	+	awaitTermination(t2);
1632	+
1633	+	assertHasNoWaiters(lock, c);
1634	+	}
1635	+
1636	+	/**
1637	+	* toString indicates current lock state
1638	+	*/
1639	+	public void testToString()      { testToString(false); }
1640	+	public void testToString_fair() { testToString(true); }
1641	+	public void testToString(boolean fair) {
1642	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1643	+	assertTrue(lock.toString().contains("Write locks = 0"));
1644	+	assertTrue(lock.toString().contains("Read locks = 0"));
1645	+	lock.writeLock().lock();
1646	+	assertTrue(lock.toString().contains("Write locks = 1"));
1647	+	assertTrue(lock.toString().contains("Read locks = 0"));
1648	+	lock.writeLock().unlock();
1649	+	lock.readLock().lock();
1650	+	lock.readLock().lock();
1651	+	assertTrue(lock.toString().contains("Write locks = 0"));
1652	+	assertTrue(lock.toString().contains("Read locks = 2"));
1653	+	}
1654	+
1655	+	/**
1656	+	* readLock.toString indicates current lock state
1657	+	*/
1658	+	public void testReadLockToString()      { testReadLockToString(false); }
1659	+	public void testReadLockToString_fair() { testReadLockToString(true); }
1660	+	public void testReadLockToString(boolean fair) {
1661	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1662	+	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1663	+	lock.readLock().lock();
1664	+	lock.readLock().lock();
1665	+	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1666	+	}
1667	+
1668	+	/**
1669	+	* writeLock.toString indicates current lock state
1670	+	*/
1671	+	public void testWriteLockToString()      { testWriteLockToString(false); }
1672	+	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1673	+	public void testWriteLockToString(boolean fair) {
1674	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1675	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1676	+	lock.writeLock().lock();
1677	+	assertTrue(lock.writeLock().toString().contains("Locked"));
1678	+	lock.writeLock().unlock();
1679	+	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1680	+	}
1681
1682		}

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