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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.9 by dl, Mon Dec 22 00:48:56 2003 UTC vs.
Revision 1.72 by jsr166, Fri Feb 27 22:06:24 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.*;
13	<	import java.util.*;
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		/**
33		* A runnable calling lockInterruptibly
34		*/
35	<	class InterruptibleLockRunnable implements Runnable {
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36		final ReentrantReadWriteLock lock;
37		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
38	<	public void run() {
39	<	try {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
38	>	public void realRun() throws InterruptedException {
39	>	lock.writeLock().lockInterruptibly();
40		}
41		}
42
35	–
43		/**
44		* A runnable calling lockInterruptibly that expects to be
45		* interrupted
46		*/
47	<	class InterruptedLockRunnable implements Runnable {
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48		final ReentrantReadWriteLock lock;
49		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
50	<	public void run() {
51	<	try {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
50	>	public void realRun() throws InterruptedException {
51	>	lock.writeLock().lockInterruptibly();
52		}
53		}
54
#	Line 53 | Line 57 | public class ReentrantReadWriteLockTest
57		*/
58		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59		PublicReentrantReadWriteLock() { super(); }
60	<	public Collection<Thread> getQueuedThreads() {
61	<	return super.getQueuedThreads();
60	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	>	public Thread getOwner() {
62	>	return super.getOwner();
63		}
64	<	public PublicCondition newCondition() {
65	<	return new PublicCondition(this);
64	>	public Collection<Thread> getQueuedThreads() {
65	>	return super.getQueuedThreads();
66		}
67	<
68	<	static class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
64	<	PublicCondition(PublicReentrantReadWriteLock l) { super(l); }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
67	>	public Collection<Thread> getWaitingThreads(Condition c) {
68	>	return super.getWaitingThreads(c);
69		}
69	–
70		}
71
72		/**
73	<	* Constructor sets given fairness, and is in unlocked state
73	>	* Releases write lock, checking that it had a hold count of 1.
74		*/
75	<	public void testConstructor() {
76	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
77	<	assertFalse(rl.isFair());
78	<	assertFalse(rl.isWriteLocked());
79	<	assertEquals(0, rl.getReadLockCount());
80	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
81	<	assertTrue(r2.isFair());
82	<	assertFalse(r2.isWriteLocked());
83	<	assertEquals(0, r2.getReadLockCount());
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		/**
84	<	* write-locking and read-locking an unlocked lock succeed
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85		*/
86	<	public void testLock() {
87	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
88	<	rl.writeLock().lock();
89	<	assertTrue(rl.isWriteLocked());
90	<	assertTrue(rl.isWriteLockedByCurrentThread());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.writeLock().unlock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
98	<	assertEquals(0, rl.getReadLockCount());
99	<	rl.readLock().lock();
100	<	assertFalse(rl.isWriteLocked());
101	<	assertFalse(rl.isWriteLockedByCurrentThread());
102	<	assertEquals(1, rl.getReadLockCount());
103	<	rl.readLock().unlock();
104	<	assertFalse(rl.isWriteLocked());
105	<	assertFalse(rl.isWriteLockedByCurrentThread());
106	<	assertEquals(0, rl.getReadLockCount());
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
109	–
97		/**
98	<	* locking an unlocked fair lock succeeds
99	<	*/
100	<	public void testFairLock() {
101	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
102	<	rl.writeLock().lock();
103	<	assertTrue(rl.isWriteLocked());
104	<	assertTrue(rl.isWriteLockedByCurrentThread());
105	<	assertEquals(0, rl.getReadLockCount());
106	<	rl.writeLock().unlock();
120	<	assertFalse(rl.isWriteLocked());
121	<	assertFalse(rl.isWriteLockedByCurrentThread());
122	<	assertEquals(0, rl.getReadLockCount());
123	<	rl.readLock().lock();
124	<	assertFalse(rl.isWriteLocked());
125	<	assertFalse(rl.isWriteLockedByCurrentThread());
126	<	assertEquals(1, rl.getReadLockCount());
127	<	rl.readLock().unlock();
128	<	assertFalse(rl.isWriteLocked());
129	<	assertFalse(rl.isWriteLockedByCurrentThread());
130	<	assertEquals(0, rl.getReadLockCount());
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	<	* getWriteHoldCount returns number of recursive holds
110	>	* Checks that lock is write-locked by the given thread.
111		*/
112	<	public void testGetHoldCount() {
113	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
114	<	for(int i = 1; i <= SIZE; i++) {
115	<	lock.writeLock().lock();
116	<	assertEquals(i,lock.getWriteHoldCount());
117	<	}
118	<	for(int i = SIZE; i > 0; i--) {
119	<	lock.writeLock().unlock();
120	<	assertEquals(i-1,lock.getWriteHoldCount());
121	<	}
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		}
147	–
125
126		/**
127	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
127	>	* Checks that lock is write-locked by the current thread.
128		*/
129	<	public void testUnlock_IllegalMonitorStateException() {
130	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
154	<	try {
155	<	rl.writeLock().unlock();
156	<	shouldThrow();
157	<	} catch(IllegalMonitorStateException success){}
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131		}
132
160	–
133		/**
134	<	* write-lockInterruptibly is interruptible
134	>	* Checks that condition c has no waiters.
135		*/
136	<	public void testWriteLockInterruptibly_Interrupted() {
137	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
138	<	lock.writeLock().lock();
167	<	Thread t = new Thread(new Runnable() {
168	<	public void run() {
169	<	try {
170	<	lock.writeLock().lockInterruptibly();
171	<	threadShouldThrow();
172	<	} catch(InterruptedException success){}
173	<	}
174	<	});
175	<	try {
176	<	t.start();
177	<	t.interrupt();
178	<	lock.writeLock().unlock();
179	<	t.join();
180	<	} catch(Exception e){
181	<	unexpectedException();
182	<	}
183	<	}
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139
140		/**
141	<	* timed write-trylock is interruptible
141	>	* Checks that condition c has exactly the given waiter threads.
142		*/
143	<	public void testWriteTryLock_Interrupted() {
144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
145	<	lock.writeLock().lock();
146	<	Thread t = new Thread(new Runnable() {
147	<	public void run() {
148	<	try {
149	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
150	<	threadShouldThrow();
151	<	} catch(InterruptedException success){}
152	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.interrupt();
202	<	lock.writeLock().unlock();
203	<	t.join();
204	<	} catch(Exception e){
205	<	unexpectedException();
206	<	}
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	<	* read-lockInterruptibly is interruptible
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160	<	public void testReadLockInterruptibly_Interrupted() {
161	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
162	<	lock.writeLock().lock();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	lock.readLock().lockInterruptibly();
167	<	threadShouldThrow();
168	<	} catch(InterruptedException success){}
169	<	}
170	<	});
171	<	try {
172	<	t.start();
173	<	t.interrupt();
174	<	lock.writeLock().unlock();
175	<	t.join();
176	<	} catch(Exception e){
177	<	unexpectedException();
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	<	}
180	>	}
181
182		/**
183	<	* timed read-trylock is interruptible
183	>	* Constructor sets given fairness, and is in unlocked state
184		*/
185	<	public void testReadTryLock_Interrupted() {
186	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	lock.writeLock().lock();
188	<	Thread t = new Thread(new Runnable() {
189	<	public void run() {
190	<	try {
191	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
192	<	threadShouldThrow();
193	<	} catch(InterruptedException success){}
194	<	}
195	<	});
196	<	try {
197	<	t.start();
198	<	t.interrupt();
199	<	t.join();
200	<	} catch(Exception e){
201	<	unexpectedException();
253	<	}
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
256	–
204		/**
205	<	* write-trylock fails if locked
205	>	* write-locking and read-locking an unlocked lock succeed
206		*/
207	<	public void testWriteTryLockWhenLocked() {
208	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
209	<	lock.writeLock().lock();
210	<	Thread t = new Thread(new Runnable() {
211	<	public void run() {
212	<	threadAssertFalse(lock.writeLock().tryLock());
213	<	}
214	<	});
215	<	try {
216	<	t.start();
217	<	t.join();
218	<	lock.writeLock().unlock();
219	<	} catch(Exception e){
220	<	unexpectedException();
221	<	}
222	<	}
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	<	* read-trylock fails if locked
227	>	* getWriteHoldCount returns number of recursive holds
228		*/
229	<	public void testReadTryLockWhenLocked() {
230	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231	<	lock.writeLock().lock();
232	<	Thread t = new Thread(new Runnable() {
233	<	public void run() {
234	<	threadAssertFalse(lock.readLock().tryLock());
235	<	}
236	<	});
237	<	try {
289	<	t.start();
290	<	t.join();
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){
293	<	unexpectedException();
239	>	assertEquals(i-1,lock.getWriteHoldCount());
240		}
241	<	}
241	>	}
242
243		/**
244	<	* Multiple threads can hold a read lock when not write-locked
244	>	* writelock.getHoldCount returns number of recursive holds
245		*/
246	<	public void testMultipleReadLocks() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	<	lock.readLock().lock();
249	<	Thread t = new Thread(new Runnable() {
250	<	public void run() {
251	<	threadAssertTrue(lock.readLock().tryLock());
252	<	lock.readLock().unlock();
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	t.join();
312	<	lock.readLock().unlock();
313	<	} catch(Exception e){
314	<	unexpectedException();
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	<	}
254	>	for (int i = SIZE; i > 0; i--) {
255	>	lock.writeLock().unlock();
256	>	assertEquals(i-1,lock.writeLock().getHoldCount());
257	>	}
258	>	}
259
260		/**
261	<	* A writelock succeeds after reading threads unlock
261	>	* getReadHoldCount returns number of recursive holds
262		*/
263	<	public void testWriteAfterMultipleReadLocks() {
264	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
265	<	lock.readLock().lock();
266	<	Thread t1 = new Thread(new Runnable() {
267	<	public void run() {
268	<	lock.readLock().lock();
269	<	lock.readLock().unlock();
270	<	}
271	<	});
330	<	Thread t2 = new Thread(new Runnable() {
331	<	public void run() {
332	<	lock.writeLock().lock();
333	<	lock.writeLock().unlock();
334	<	}
335	<	});
336	<
337	<	try {
338	<	t1.start();
339	<	t2.start();
340	<	Thread.sleep(SHORT_DELAY_MS);
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	<	t1.join(MEDIUM_DELAY_MS);
343	<	t2.join(MEDIUM_DELAY_MS);
344	<	assertTrue(!t1.isAlive());
345	<	assertTrue(!t2.isAlive());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
273	>	assertEquals(i-1,lock.getReadHoldCount());
274		}
275	<	}
275	>	}
276
277		/**
278	<	* Readlocks succeed after a writing thread unlocks
278	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
279		*/
280	<	public void testReadAfterWriteLock() {
281	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
282	<	lock.writeLock().lock();
283	<	Thread t1 = new Thread(new Runnable() {
359	<	public void run() {
360	<	lock.readLock().lock();
361	<	lock.readLock().unlock();
362	<	}
363	<	});
364	<	Thread t2 = new Thread(new Runnable() {
365	<	public void run() {
366	<	lock.readLock().lock();
367	<	lock.readLock().unlock();
368	<	}
369	<	});
370	<
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 {
372	–	t1.start();
373	–	t2.start();
374	–	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());
379	<	assertTrue(!t2.isAlive());
380	<
381	<	} catch(Exception e){
382	<	unexpectedException();
383	<	}
384	<	}
385	<
286	>	shouldThrow();
287	>	} catch (IllegalMonitorStateException success) {}
288	>	}
289
290		/**
291	<	* Read trylock succeeds if readlocked but not writelocked
291	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
292		*/
293	<	public void testTryLockWhenReadLocked() {
294	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
295	<	lock.readLock().lock();
296	<	Thread t = new Thread(new Runnable() {
394	<	public void run() {
395	<	threadAssertTrue(lock.readLock().tryLock());
396	<	lock.readLock().unlock();
397	<	}
398	<	});
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 {
400	–	t.start();
401	–	t.join();
298		lock.readLock().unlock();
299	<	} catch(Exception e){
300	<	unexpectedException();
301	<	}
406	<	}
407	<
408	<
299	>	shouldThrow();
300	>	} catch (IllegalMonitorStateException success) {}
301	>	}
302
303		/**
304	<	* write trylock fails when readlocked
304	>	* write-lockInterruptibly is interruptible
305		*/
306	<	public void testWriteTryLockWhenReadLocked() {
307	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
308	<	lock.readLock().lock();
309	<	Thread t = new Thread(new Runnable() {
310	<	public void run() {
311	<	threadAssertFalse(lock.writeLock().tryLock());
312	<	}
313	<	});
314	<	try {
315	<	t.start();
423	<	t.join();
424	<	lock.readLock().unlock();
425	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
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	<
317	>	waitForQueuedThread(lock, t);
318	>	t.interrupt();
319	>	awaitTermination(t);
320	>	releaseWriteLock(lock);
321	>	}
322
323		/**
324	<	* write timed trylock times out if locked
325	<	*/
326	<	public void testWriteTryLock_Timeout() {
327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
328	<	lock.writeLock().lock();
329	<	Thread t = new Thread(new Runnable() {
330	<	public void run() {
331	<	try {
332	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
333	<	} catch (Exception ex) {
334	<	threadUnexpectedException();
335	<	}
336	<	}
337	<	});
338	<	try {
339	<	t.start();
340	<	t.join();
341	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
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		/**
344	<	* read timed trylock times out if write-locked
344	>	* read-lockInterruptibly is interruptible
345		*/
346	<	public void testReadTryLock_Timeout() {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	<	lock.writeLock().lock();
349	<	Thread t = new Thread(new Runnable() {
350	<	public void run() {
351	<	try {
352	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
353	<	} catch (Exception ex) {
354	<	threadUnexpectedException();
355	<	}
356	<	}
357	<	});
358	<	try {
359	<	t.start();
360	<	t.join();
361	<	lock.writeLock().unlock();
362	<	} catch(Exception e){
363	<	unexpectedException();
364	<	}
365	<	}
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	>	/**
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	>	/**
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	<	* write lockInterruptibly succeeds if lock free else is interruptible
436	>	* Multiple threads can hold a read lock when not write-locked
437		*/
438	<	public void testWriteLockInterruptibly() {
439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	<	try {
441	<	lock.writeLock().lockInterruptibly();
442	<	} catch(Exception e) {
443	<	unexpectedException();
444	<	}
445	<	Thread t = new Thread(new Runnable() {
446	<	public void run() {
447	<	try {
448	<	lock.writeLock().lockInterruptibly();
449	<	threadShouldThrow();
450	<	}
451	<	catch(InterruptedException success) {
452	<	}
453	<	}
454	<	});
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	>	/**
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	<	t.start();
833	<	t.interrupt();
834	<	t.join();
835	<	lock.writeLock().unlock();
836	<	} catch(Exception e){
837	<	unexpectedException();
838	<	}
832	>	lock.writeLock().lockInterruptibly();
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		/**
847	<	*  read lockInterruptibly succeeds if lock free else is interruptible
847	>	* read lockInterruptibly succeeds if lock free else is interruptible
848		*/
849	<	public void testReadLockInterruptibly() {
850	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	<	try {
852	<	lock.writeLock().lockInterruptibly();
853	<	} catch(Exception e) {
519	<	unexpectedException();
520	<	}
521	<	Thread t = new Thread(new Runnable() {
522	<	public void run() {
523	<	try {
524	<	lock.readLock().lockInterruptibly();
525	<	threadShouldThrow();
526	<	}
527	<	catch(InterruptedException success) {
528	<	}
529	<	}
530	<	});
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	<	t.start();
856	<	t.interrupt();
857	<	t.join();
858	<	lock.writeLock().unlock();
859	<	} catch(Exception e){
860	<	unexpectedException();
861	<	}
855	>	lock.readLock().lockInterruptibly();
856	>	lock.readLock().unlock();
857	>	lock.writeLock().lockInterruptibly();
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		/**
871		* Calling await without holding lock throws IllegalMonitorStateException
872		*/
873	<	public void testAwait_IllegalMonitor() {
874	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	shouldThrow();
881	<	}
882	<	catch (IllegalMonitorStateException success) {
883	<	}
884	<	catch (Exception ex) {
885	<	shouldThrow();
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		/**
892		* Calling signal without holding lock throws IllegalMonitorStateException
893		*/
894	<	public void testSignal_IllegalMonitor() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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		shouldThrow();
902	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
902	>	} catch (IllegalMonitorStateException success) {}
903		}
904
905		/**
906	<	* awaitNanos without a signal times out
906	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
907		*/
908	<	public void testAwaitNanos_Timeout() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938		}
939
592	–
940		/**
941	<	*  timed await without a signal times out
941	>	* timed await without a signal times out
942		*/
943	<	public void testAwait_Timeout() {
944	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
945	<	final Condition c = lock.writeLock().newCondition();
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	<	}
604	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
956	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
957		}
958
959		/**
960		* awaitUntil without a signal times out
961		*/
962	<	public void testAwaitUntil_Timeout() {
963	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
964	<	final Condition c = lock.writeLock().newCondition();
965	<	try {
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	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
976	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
977		}
978
979		/**
980		* await returns when signalled
981		*/
982	<	public void testAwait() {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	threadUnexpectedException();
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	<	unexpectedException();
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		/**
1055	<	* awaitUninterruptibly doesn't abort on interrupt
1056	<	*/
1057	<	public void testAwaitUninterruptibly() {
1058	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	try {
1094	<	t.start();
1095	<	Thread.sleep(SHORT_DELAY_MS);
1096	<	t.interrupt();
1097	<	lock.writeLock().lock();
1098	<	c.signal();
1099	<	lock.writeLock().unlock();
1100	<	assert(t.isInterrupted());
1101	<	t.join(SHORT_DELAY_MS);
1102	<	assertFalse(t.isAlive());
1103	<	}
1104	<	catch (Exception ex) {
1105	<	unexpectedException();
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	<	* await is interruptible
1134	<	*/
1135	<	public void testAwait_Interrupt() {
1136	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	Thread t = new Thread(new Runnable() {
1142	<	public void run() {
1143	<	try {
1144	<	lock.writeLock().lock();
1145	<	c.await();
1146	<	lock.writeLock().unlock();
1147	<	threadShouldThrow();
1148	<	}
1149	<	catch(InterruptedException success) {
1150	<	}
1151	<	}
1152	<	});
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	<	t.start();
1289	<	Thread.sleep(SHORT_DELAY_MS);
1290	<	t.interrupt();
712	<	t.join(SHORT_DELAY_MS);
713	<	assertFalse(t.isAlive());
714	<	}
715	<	catch (Exception ex) {
716	<	unexpectedException();
717	<	}
1288	>	lock.hasQueuedThread(null);
1289	>	shouldThrow();
1290	>	} catch (NullPointerException success) {}
1291		}
1292
1293		/**
1294	<	* awaitNanos is interruptible
1294	>	* hasQueuedThread reports whether a thread is queued
1295		*/
1296	<	public void testAwaitNanos_Interrupt() {
1297	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1298	<	final Condition c = lock.writeLock().newCondition();
1299	<	Thread t = new Thread(new Runnable() {
1300	<	public void run() {
1301	<	try {
1302	<	lock.writeLock().lock();
1303	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1304	<	lock.writeLock().unlock();
1305	<	threadShouldThrow();
1306	<	}
1307	<	catch(InterruptedException success) {
1308	<	}
1309	<	}
1310	<	});
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	<	t.start();
1391	<	Thread.sleep(SHORT_DELAY_MS);
1392	<	t.interrupt();
743	<	t.join(SHORT_DELAY_MS);
744	<	assertFalse(t.isAlive());
745	<	}
746	<	catch (Exception ex) {
747	<	unexpectedException();
748	<	}
1390	>	lock.hasWaiters(null);
1391	>	shouldThrow();
1392	>	} catch (NullPointerException success) {}
1393		}
1394
1395		/**
1396	<	* awaitUntil is interruptible
1396	>	* getWaitQueueLength throws NPE if null
1397		*/
1398	<	public void testAwaitUntil_Interrupt() {
1399	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1400	<	final Condition c = lock.writeLock().newCondition();
1401	<	Thread t = new Thread(new Runnable() {
1402	<	public void run() {
1403	<	try {
1404	<	lock.writeLock().lock();
1405	<	java.util.Date d = new java.util.Date();
1406	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
763	<	lock.writeLock().unlock();
764	<	threadShouldThrow();
765	<	}
766	<	catch(InterruptedException success) {
767	<	}
768	<	}
769	<	});
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	<	t.start();
1417	<	Thread.sleep(SHORT_DELAY_MS);
1418	<	t.interrupt();
775	<	t.join(SHORT_DELAY_MS);
776	<	assertFalse(t.isAlive());
777	<	}
778	<	catch (Exception ex) {
779	<	unexpectedException();
780	<	}
1416	>	lock.getWaitingThreads(null);
1417	>	shouldThrow();
1418	>	} catch (NullPointerException success) {}
1419		}
1420
1421		/**
1422	<	* signalAll wakes up all threads
1422	>	* hasWaiters throws IllegalArgumentException if not owned
1423		*/
1424	<	public void testSignalAll() {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	Thread t1 = new Thread(new Runnable() {
1430	<	public void run() {
1431	<	try {
1432	<	lock.writeLock().lock();
1433	<	c.await();
1434	<	lock.writeLock().unlock();
795	<	}
796	<	catch(InterruptedException e) {
797	<	threadUnexpectedException();
798	<	}
799	<	}
800	<	});
801	<
802	<	Thread t2 = new Thread(new Runnable() {
803	<	public void run() {
804	<	try {
805	<	lock.writeLock().lock();
806	<	c.await();
807	<	lock.writeLock().unlock();
808	<	}
809	<	catch(InterruptedException e) {
810	<	threadUnexpectedException();
811	<	}
812	<	}
813	<	});
1429	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1430	>	try {
1431	>	lock2.hasWaiters(c);
1432	>	shouldThrow();
1433	>	} catch (IllegalArgumentException success) {}
1434	>	}
1435
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	<	t1.start();
1446	<	t2.start();
1447	<	Thread.sleep(SHORT_DELAY_MS);
819	<	lock.writeLock().lock();
820	<	c.signalAll();
821	<	lock.writeLock().unlock();
822	<	t1.join(SHORT_DELAY_MS);
823	<	t2.join(SHORT_DELAY_MS);
824	<	assertFalse(t1.isAlive());
825	<	assertFalse(t2.isAlive());
826	<	}
827	<	catch (Exception ex) {
828	<	unexpectedException();
829	<	}
1445	>	lock.hasWaiters(c);
1446	>	shouldThrow();
1447	>	} catch (IllegalMonitorStateException success) {}
1448		}
1449
1450		/**
1451	<	* A serialized lock deserializes as unlocked
1451	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1452		*/
1453	<	public void testSerialization() {
1454	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1455	<	l.readLock().lock();
1456	<	l.readLock().unlock();
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	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1475	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1476	<	out.writeObject(l);
844	<	out.close();
845	<
846	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
847	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
848	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
849	<	r.readLock().lock();
850	<	r.readLock().unlock();
851	<	} catch(Exception e){
852	<	e.printStackTrace();
853	<	unexpectedException();
854	<	}
1474	>	lock.getWaitQueueLength(c);
1475	>	shouldThrow();
1476	>	} catch (IllegalMonitorStateException success) {}
1477		}
1478
1479		/**
1480	<	* getQueueLength reports number of waiting threads
1480	>	* getWaitingThreads throws IllegalArgumentException if not owned
1481		*/
1482	<	public void testGetQueueLength() {
1483	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1484	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1485	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
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	<	assertEquals(0, lock.getQueueLength());
1492	<	lock.writeLock().lock();
1493	<	t1.start();
1494	<	Thread.sleep(SHORT_DELAY_MS);
869	<	assertEquals(1, lock.getQueueLength());
870	<	t2.start();
871	<	Thread.sleep(SHORT_DELAY_MS);
872	<	assertEquals(2, lock.getQueueLength());
873	<	t1.interrupt();
874	<	Thread.sleep(SHORT_DELAY_MS);
875	<	assertEquals(1, lock.getQueueLength());
876	<	lock.writeLock().unlock();
877	<	Thread.sleep(SHORT_DELAY_MS);
878	<	assertEquals(0, lock.getQueueLength());
879	<	t1.join();
880	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1491	>	lock2.getWaitingThreads(c);
1492	>	shouldThrow();
1493	>	} catch (IllegalArgumentException success) {}
1494	>	}
1495
1496		/**
1497	<	* getQueuedThreads includes waiting threads
1497	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1498		*/
1499	<	public void testGetQueuedThreads() {
1500	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1501	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1502	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
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	<	assertTrue(lock.getQueuedThreads().isEmpty());
1507	<	lock.writeLock().lock();
1508	<	assertTrue(lock.getQueuedThreads().isEmpty());
1509	<	t1.start();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().contains(t1));
900	<	t2.start();
901	<	Thread.sleep(SHORT_DELAY_MS);
902	<	assertTrue(lock.getQueuedThreads().contains(t1));
903	<	assertTrue(lock.getQueuedThreads().contains(t2));
904	<	t1.interrupt();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	assertFalse(lock.getQueuedThreads().contains(t1));
907	<	assertTrue(lock.getQueuedThreads().contains(t2));
908	<	lock.writeLock().unlock();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	assertTrue(lock.getQueuedThreads().isEmpty());
911	<	t1.join();
912	<	t2.join();
913	<	} catch(Exception e){
914	<	unexpectedException();
915	<	}
916	<	}
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() {
1515	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1516	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1517	<	Thread t = new Thread(new Runnable() {
1518	<	public void run() {
1519	<	try {
1520	<	lock.writeLock().lock();
1521	<	threadAssertFalse(c.hasWaiters());
1522	<	threadAssertEquals(0, c.getWaitQueueLength());
1523	<	c.await();
1524	<	lock.writeLock().unlock();
1525	<	}
1526	<	catch(InterruptedException e) {
1527	<	threadUnexpectedException();
1528	<	}
1529	<	}
1530	<	});
1531	<
1532	<	try {
1533	<	t.start();
1534	<	Thread.sleep(SHORT_DELAY_MS);
1535	<	lock.writeLock().lock();
1536	<	assertTrue(c.hasWaiters());
1537	<	assertEquals(1, c.getWaitQueueLength());
1538	<	c.signal();
1539	<	lock.writeLock().unlock();
1540	<	Thread.sleep(SHORT_DELAY_MS);
1541	<	lock.writeLock().lock();
1542	<	assertFalse(c.hasWaiters());
950	<	assertEquals(0, c.getWaitQueueLength());
951	<	lock.writeLock().unlock();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
954	<	}
955	<	catch (Exception ex) {
956	<	unexpectedException();
957	<	}
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() {
1549	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1550	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1551	<	Thread t1 = new Thread(new Runnable() {
1552	<	public void run() {
1553	<	try {
1554	<	lock.writeLock().lock();
1555	<	threadAssertFalse(c.hasWaiters());
1556	<	threadAssertEquals(0, c.getWaitQueueLength());
1557	<	c.await();
1558	<	lock.writeLock().unlock();
1559	<	}
1560	<	catch(InterruptedException e) {
1561	<	threadUnexpectedException();
1562	<	}
1563	<	}
1564	<	});
1565	<
1566	<	Thread t2 = new Thread(new Runnable() {
1567	<	public void run() {
1568	<	try {
1569	<	lock.writeLock().lock();
1570	<	threadAssertTrue(c.hasWaiters());
1571	<	threadAssertEquals(1, c.getWaitQueueLength());
1572	<	c.await();
988	<	lock.writeLock().unlock();
989	<	}
990	<	catch(InterruptedException e) {
991	<	threadUnexpectedException();
992	<	}
993	<	}
994	<	});
995	<
996	<	try {
997	<	t1.start();
998	<	Thread.sleep(SHORT_DELAY_MS);
999	<	t2.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	lock.writeLock().lock();
1002	<	assertTrue(c.hasWaiters());
1003	<	assertEquals(2, c.getWaitQueueLength());
1004	<	c.signalAll();
1005	<	lock.writeLock().unlock();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	lock.writeLock().lock();
1008	<	assertFalse(c.hasWaiters());
1009	<	assertEquals(0, c.getWaitQueueLength());
1010	<	lock.writeLock().unlock();
1011	<	t1.join(SHORT_DELAY_MS);
1012	<	t2.join(SHORT_DELAY_MS);
1013	<	assertFalse(t1.isAlive());
1014	<	assertFalse(t2.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	unexpectedException();
1018	<	}
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() {
1579	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1580	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1581	<	Thread t1 = new Thread(new Runnable() {
1582	<	public void run() {
1583	<	try {
1584	<	lock.writeLock().lock();
1585	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1586	<	c.await();
1587	<	lock.writeLock().unlock();
1588	<	}
1589	<	catch(InterruptedException e) {
1590	<	threadUnexpectedException();
1591	<	}
1592	<	}
1593	<	});
1594	<
1595	<	Thread t2 = new Thread(new Runnable() {
1596	<	public void run() {
1597	<	try {
1598	<	lock.writeLock().lock();
1599	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
1600	<	c.await();
1601	<	lock.writeLock().unlock();
1602	<	}
1603	<	catch(InterruptedException e) {
1604	<	threadUnexpectedException();
1605	<	}
1606	<	}
1607	<	});
1608	<
1609	<	try {
1610	<	lock.writeLock().lock();
1611	<	assertTrue(c.getWaitingThreads().isEmpty());
1612	<	lock.writeLock().unlock();
1613	<	t1.start();
1614	<	Thread.sleep(SHORT_DELAY_MS);
1615	<	t2.start();
1616	<	Thread.sleep(SHORT_DELAY_MS);
1617	<	lock.writeLock().lock();
1618	<	assertTrue(c.hasWaiters());
1619	<	assertTrue(c.getWaitingThreads().contains(t1));
1620	<	assertTrue(c.getWaitingThreads().contains(t2));
1621	<	c.signalAll();
1622	<	lock.writeLock().unlock();
1623	<	Thread.sleep(SHORT_DELAY_MS);
1624	<	lock.writeLock().lock();
1625	<	assertFalse(c.hasWaiters());
1626	<	assertTrue(c.getWaitingThreads().isEmpty());
1627	<	lock.writeLock().unlock();
1628	<	t1.join(SHORT_DELAY_MS);
1629	<	t2.join(SHORT_DELAY_MS);
1630	<	assertFalse(t1.isAlive());
1631	<	assertFalse(t2.isAlive());
1632	<	}
1633	<	catch (Exception ex) {
1634	<	unexpectedException();
1635	<	}
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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