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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.23 by dl, Mon Aug 1 19:53:01 2005 UTC vs.
Revision 1.70 by jsr166, Wed Dec 31 20:34:16 2014 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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 {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
38	>	public void realRun() throws InterruptedException {
39	>	lock.writeLock().lockInterruptibly();
40		}
41		}
42
36	–
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 {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
50	>	public void realRun() throws InterruptedException {
51	>	lock.writeLock().lockInterruptibly();
52		}
53		}
54
#	Line 54 | 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 Collection<Thread> getWaitingThreads(Condition c) {
65	<	return super.getWaitingThreads(c);
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	<	* 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);
74	<	assertTrue(r2.isFair());
75	<	assertFalse(r2.isWriteLocked());
76	<	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());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.readLock().lock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
95	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	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
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	<	* locking an unlocked fair lock succeeds
111	<	*/
112	<	public void testFairLock() {
113	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
114	<	rl.writeLock().lock();
115	<	assertTrue(rl.isWriteLocked());
116	<	assertTrue(rl.isWriteLockedByCurrentThread());
117	<	assertEquals(0, rl.getReadLockCount());
118	<	rl.writeLock().unlock();
119	<	assertFalse(rl.isWriteLocked());
120	<	assertFalse(rl.isWriteLockedByCurrentThread());
121	<	assertEquals(0, rl.getReadLockCount());
122	<	rl.readLock().lock();
123	<	assertFalse(rl.isWriteLocked());
118	<	assertFalse(rl.isWriteLockedByCurrentThread());
119	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
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	<	* getWriteHoldCount returns number of recursive holds
127	>	* Checks that lock is write-locked by the current thread.
128		*/
129	<	public void testGetWriteHoldCount() {
130	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
131	<	for(int i = 1; i <= SIZE; i++) {
132	<	lock.writeLock().lock();
133	<	assertEquals(i,lock.getWriteHoldCount());
134	<	}
135	<	for(int i = SIZE; i > 0; i--) {
136	<	lock.writeLock().unlock();
137	<	assertEquals(i-1,lock.getWriteHoldCount());
138	<	}
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131		}
132
133		/**
134	<	* getReadHoldCount returns number of recursive holds
134	>	* Checks that condition c has no waiters.
135		*/
136	<	public void testGetReadHoldCount() {
137	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
146	<	for(int i = 1; i <= SIZE; i++) {
147	<	lock.readLock().lock();
148	<	assertEquals(i,lock.getReadHoldCount());
149	<	}
150	<	for(int i = SIZE; i > 0; i--) {
151	<	lock.readLock().unlock();
152	<	assertEquals(i-1,lock.getReadHoldCount());
153	<	}
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138		}
155	–
139
140		/**
141	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
141	>	* Checks that condition c has exactly the given waiter threads.
142		*/
143	<	public void testUnlock_IllegalMonitorStateException() {
144	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
145	<	try {
146	<	rl.writeLock().unlock();
147	<	shouldThrow();
148	<	} catch(IllegalMonitorStateException success){}
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	<	* write-lockInterruptibly is interruptible
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160	<	public void testWriteLockInterruptibly_Interrupted() {
161	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
162	<	Thread t = new Thread(new Runnable() {
163	<	public void run() {
164	<	try {
165	<	lock.writeLock().lockInterruptibly();
166	<	lock.writeLock().unlock();
167	<	lock.writeLock().lockInterruptibly();
168	<	lock.writeLock().unlock();
169	<	} catch(InterruptedException success){}
170	<	}
171	<	});
172	<	try {
173	<	lock.writeLock().lock();
174	<	t.start();
175	<	t.interrupt();
176	<	lock.writeLock().unlock();
177	<	t.join();
178	<	} catch(Exception e){
191	<	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 write-tryLock is interruptible
183	>	* Constructor sets given fairness, and is in unlocked state
184		*/
185	<	public void testWriteTryLock_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.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
192	<	} catch(InterruptedException success){}
193	<	}
194	<	});
195	<	try {
196	<	t.start();
197	<	t.interrupt();
198	<	lock.writeLock().unlock();
199	<	t.join();
200	<	} catch(Exception e){
201	<	unexpectedException();
215	<	}
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	<	* read-lockInterruptibly is interruptible
205	>	* write-locking and read-locking an unlocked lock succeed
206		*/
207	<	public void testReadLockInterruptibly_Interrupted() {
208	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
209	<	lock.writeLock().lock();
210	<	Thread t = new Thread(new Runnable() {
211	<	public void run() {
212	<	try {
213	<	lock.readLock().lockInterruptibly();
214	<	} catch(InterruptedException success){}
215	<	}
216	<	});
217	<	try {
218	<	t.start();
219	<	t.interrupt();
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	<	t.join();
236	<	} catch(Exception e){
237	<	unexpectedException();
239	>	assertEquals(i-1,lock.getWriteHoldCount());
240		}
241	<	}
241	>	}
242
243		/**
244	<	* timed read-tryLock is interruptible
244	>	* writelock.getHoldCount returns number of recursive holds
245		*/
246	<	public void testReadTryLock_Interrupted() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	<	lock.writeLock().lock();
249	<	Thread t = new Thread(new Runnable() {
250	<	public void run() {
251	<	try {
252	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
253	<	threadShouldThrow();
254	<	} catch(InterruptedException success){}
255	<	}
256	<	});
255	<	try {
256	<	t.start();
257	<	t.interrupt();
258	<	t.join();
259	<	} catch(Exception e){
260	<	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	>	for (int i = SIZE; i > 0; i--) {
255	>	lock.writeLock().unlock();
256	>	assertEquals(i-1,lock.writeLock().getHoldCount());
257		}
258		}
259
264	–
260		/**
261	<	* write-tryLock fails if locked
261	>	* getReadHoldCount returns number of recursive holds
262		*/
263	<	public void testWriteTryLockWhenLocked() {
264	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
265	<	lock.writeLock().lock();
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run() {
268	<	threadAssertFalse(lock.writeLock().tryLock());
269	<	}
270	<	});
271	<	try {
272	<	t.start();
273	<	t.join();
279	<	lock.writeLock().unlock();
280	<	} catch(Exception e){
281	<	unexpectedException();
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	>	assertEquals(i-1,lock.getReadHoldCount());
274		}
275	<	}
275	>	}
276
277		/**
278	<	* read-tryLock fails if locked
278	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
279		*/
280	<	public void testReadTryLockWhenLocked() {
281	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
282	<	lock.writeLock().lock();
283	<	Thread t = new Thread(new Runnable() {
292	<	public void run() {
293	<	threadAssertFalse(lock.readLock().tryLock());
294	<	}
295	<	});
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 {
297	–	t.start();
298	–	t.join();
285		lock.writeLock().unlock();
286	<	} catch(Exception e){
287	<	unexpectedException();
288	<	}
303	<	}
286	>	shouldThrow();
287	>	} catch (IllegalMonitorStateException success) {}
288	>	}
289
290		/**
291	<	* Multiple threads can hold a read lock when not write-locked
291	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
292		*/
293	<	public void testMultipleReadLocks() {
294	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
295	<	lock.readLock().lock();
296	<	Thread t = new Thread(new Runnable() {
312	<	public void run() {
313	<	threadAssertTrue(lock.readLock().tryLock());
314	<	lock.readLock().unlock();
315	<	}
316	<	});
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 {
318	–	t.start();
319	–	t.join();
298		lock.readLock().unlock();
299	<	} catch(Exception e){
300	<	unexpectedException();
301	<	}
324	<	}
299	>	shouldThrow();
300	>	} catch (IllegalMonitorStateException success) {}
301	>	}
302
303		/**
304	<	* A writelock succeeds after reading threads unlock
304	>	* write-lockInterruptibly is interruptible
305		*/
306	<	public void testWriteAfterMultipleReadLocks() {
307	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
308	<	lock.readLock().lock();
309	<	Thread t1 = new Thread(new Runnable() {
310	<	public void run() {
311	<	lock.readLock().lock();
312	<	lock.readLock().unlock();
313	<	}
314	<	});
315	<	Thread t2 = new Thread(new Runnable() {
339	<	public void run() {
340	<	lock.writeLock().lock();
341	<	lock.writeLock().unlock();
342	<	}
343	<	});
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	<	try {
318	<	t1.start();
319	<	t2.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	lock.readLock().unlock();
350	<	t1.join(MEDIUM_DELAY_MS);
351	<	t2.join(MEDIUM_DELAY_MS);
352	<	assertTrue(!t1.isAlive());
353	<	assertTrue(!t2.isAlive());
354	<
355	<	} catch(Exception e){
356	<	unexpectedException();
357	<	}
358	<	}
317	>	waitForQueuedThread(lock, t);
318	>	t.interrupt();
319	>	awaitTermination(t);
320	>	releaseWriteLock(lock);
321	>	}
322
323		/**
324	<	* Readlocks succeed after a writing thread unlocks
324	>	* timed write-tryLock is interruptible
325		*/
326	<	public void testReadAfterWriteLock() {
327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
328	<	lock.writeLock().lock();
329	<	Thread t1 = new Thread(new Runnable() {
330	<	public void run() {
331	<	lock.readLock().lock();
332	<	lock.readLock().unlock();
333	<	}
334	<	});
335	<	Thread t2 = new Thread(new Runnable() {
336	<	public void run() {
337	<	lock.readLock().lock();
338	<	lock.readLock().unlock();
339	<	}
340	<	});
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	<	try {
344	<	t1.start();
345	<	t2.start();
346	<	Thread.sleep(SHORT_DELAY_MS);
347	<	lock.writeLock().unlock();
348	<	t1.join(MEDIUM_DELAY_MS);
349	<	t2.join(MEDIUM_DELAY_MS);
350	<	assertTrue(!t1.isAlive());
351	<	assertTrue(!t2.isAlive());
352	<
353	<	} catch(Exception e){
354	<	unexpectedException();
355	<	}
356	<	}
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		/**
364	<	* Read trylock succeeds if write locked by current thread
364	>	* timed read-tryLock is interruptible
365		*/
366	<	public void testReadHoldingWriteLock() {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	lock.writeLock().lock();
369	<	assertTrue(lock.readLock().tryLock());
370	<	lock.readLock().unlock();
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	<	}
396	>	releaseWriteLock(lock);
397	>	}
398
399		/**
400	<	* Read lock succeeds if write locked by current thread even if
407	<	* other threads are waiting for readlock
400	>	* write-tryLock fails if locked
401		*/
402	<	public void testReadHoldingWriteLock2() {
403	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
404	<	lock.writeLock().lock();
405	<	Thread t1 = new Thread(new Runnable() {
406	<	public void run() {
407	<	lock.readLock().lock();
408	<	lock.readLock().unlock();
409	<	}
410	<	});
411	<	Thread t2 = new Thread(new Runnable() {
419	<	public void run() {
420	<	lock.readLock().lock();
421	<	lock.readLock().unlock();
422	<	}
423	<	});
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	<	try {
414	<	t1.start();
415	<	t2.start();
428	<	lock.readLock().lock();
429	<	lock.readLock().unlock();
430	<	Thread.sleep(SHORT_DELAY_MS);
431	<	lock.readLock().lock();
432	<	lock.readLock().unlock();
433	<	lock.writeLock().unlock();
434	<	t1.join(MEDIUM_DELAY_MS);
435	<	t2.join(MEDIUM_DELAY_MS);
436	<	assertTrue(!t1.isAlive());
437	<	assertTrue(!t2.isAlive());
438	<
439	<	} catch(Exception e){
440	<	unexpectedException();
441	<	}
442	<	}
413	>	awaitTermination(t);
414	>	releaseWriteLock(lock);
415	>	}
416
417		/**
418	<	*  Read lock succeeds if write locked by current thread even if
446	<	* other threads are waiting for writelock
418	>	* read-tryLock fails if locked
419		*/
420	<	public void testReadHoldingWriteLock3() {
421	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
422	<	lock.writeLock().lock();
423	<	Thread t1 = new Thread(new Runnable() {
424	<	public void run() {
425	<	lock.writeLock().lock();
426	<	lock.writeLock().unlock();
427	<	}
428	<	});
429	<	Thread t2 = new Thread(new Runnable() {
458	<	public void run() {
459	<	lock.writeLock().lock();
460	<	lock.writeLock().unlock();
461	<	}
462	<	});
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	<	try {
432	<	t1.start();
433	<	t2.start();
467	<	lock.readLock().lock();
468	<	lock.readLock().unlock();
469	<	Thread.sleep(SHORT_DELAY_MS);
470	<	lock.readLock().lock();
471	<	lock.readLock().unlock();
472	<	lock.writeLock().unlock();
473	<	t1.join(MEDIUM_DELAY_MS);
474	<	t2.join(MEDIUM_DELAY_MS);
475	<	assertTrue(!t1.isAlive());
476	<	assertTrue(!t2.isAlive());
477	<
478	<	} catch(Exception e){
479	<	unexpectedException();
480	<	}
481	<	}
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	<	*  Write lock succeeds if write locked by current thread even if
486	<	* other threads are waiting for writelock
458	>	* A writelock succeeds only after a reading thread unlocks
459		*/
460	<	public void testWriteHoldingWriteLock4() {
461	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
462	<	lock.writeLock().lock();
463	<	Thread t1 = new Thread(new Runnable() {
464	<	public void run() {
465	<	lock.writeLock().lock();
466	<	lock.writeLock().unlock();
467	<	}
468	<	});
469	<	Thread t2 = new Thread(new Runnable() {
470	<	public void run() {
471	<	lock.writeLock().lock();
472	<	lock.writeLock().unlock();
473	<	}
474	<	});
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	<	try {
483	<	t1.start();
484	<	t2.start();
485	<	lock.writeLock().lock();
486	<	lock.writeLock().unlock();
487	<	Thread.sleep(SHORT_DELAY_MS);
488	<	lock.writeLock().lock();
489	<	lock.writeLock().unlock();
490	<	lock.writeLock().unlock();
491	<	t1.join(MEDIUM_DELAY_MS);
492	<	t2.join(MEDIUM_DELAY_MS);
493	<	assertTrue(!t1.isAlive());
494	<	assertTrue(!t2.isAlive());
495	<
496	<	} catch(Exception e){
497	<	unexpectedException();
498	<	}
499	<	}
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	<	* Fair Read trylock succeeds if write locked by current thread
583	>	* Read trylock succeeds if write locked by current thread
584		*/
585	<	public void testReadHoldingWriteLockFair() {
586	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
587	<	lock.writeLock().lock();
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	<	}
593	>	}
594
595		/**
596	<	* Fair Read lock succeeds if write locked by current thread even if
597	<	* other threads are waiting for readlock
596	>	* Read trylock succeeds (barging) even in the presence of waiting
597	>	* readers and/or writers
598		*/
599	<	public void testReadHoldingWriteLockFair2() {
600	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
601	<	lock.writeLock().lock();
602	<	Thread t1 = new Thread(new Runnable() {
603	<	public void run() {
604	<	lock.readLock().lock();
545	<	lock.readLock().unlock();
546	<	}
547	<	});
548	<	Thread t2 = new Thread(new Runnable() {
549	<	public void run() {
550	<	lock.readLock().lock();
551	<	lock.readLock().unlock();
552	<	}
553	<	});
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	<	try {
607	<	t1.start();
608	<	t2.start();
609	<	lock.readLock().lock();
610	<	lock.readLock().unlock();
560	<	Thread.sleep(SHORT_DELAY_MS);
561	<	lock.readLock().lock();
562	<	lock.readLock().unlock();
563	<	lock.writeLock().unlock();
564	<	t1.join(MEDIUM_DELAY_MS);
565	<	t2.join(MEDIUM_DELAY_MS);
566	<	assertTrue(!t1.isAlive());
567	<	assertTrue(!t2.isAlive());
568	<
569	<	} catch(Exception e){
570	<	unexpectedException();
571	<	}
572	<	}
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	<	* Fair Read lock succeeds if write locked by current thread even if
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 testReadHoldingWriteLockFair3() {
677	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
678	<	lock.writeLock().lock();
679	<	Thread t1 = new Thread(new Runnable() {
680	<	public void run() {
681	<	lock.writeLock().lock();
682	<	lock.writeLock().unlock();
683	<	}
587	<	});
588	<	Thread t2 = new Thread(new Runnable() {
589	<	public void run() {
590	<	lock.writeLock().lock();
591	<	lock.writeLock().unlock();
592	<	}
593	<	});
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	<	try {
686	<	t1.start();
687	<	t2.start();
688	<	lock.readLock().lock();
689	<	lock.readLock().unlock();
690	<	Thread.sleep(SHORT_DELAY_MS);
691	<	lock.readLock().lock();
692	<	lock.readLock().unlock();
693	<	lock.writeLock().unlock();
694	<	t1.join(MEDIUM_DELAY_MS);
605	<	t2.join(MEDIUM_DELAY_MS);
606	<	assertTrue(!t1.isAlive());
607	<	assertTrue(!t2.isAlive());
608	<
609	<	} catch(Exception e){
610	<	unexpectedException();
611	<	}
612	<	}
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	<	* Fair Write lock succeeds if write locked by current thread even if
708	>	* Write lock succeeds if write locked by current thread even if
709		* other threads are waiting for writelock
710		*/
711	<	public void testWriteHoldingWriteLockFair4() {
712	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
713	<	lock.writeLock().lock();
714	<	Thread t1 = new Thread(new Runnable() {
715	<	public void run() {
716	<	lock.writeLock().lock();
717	<	lock.writeLock().unlock();
718	<	}
627	<	});
628	<	Thread t2 = new Thread(new Runnable() {
629	<	public void run() {
630	<	lock.writeLock().lock();
631	<	lock.writeLock().unlock();
632	<	}
633	<	});
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	<	try {
721	<	t1.start();
722	<	t2.start();
723	<	Thread.sleep(SHORT_DELAY_MS);
724	<	assertTrue(lock.isWriteLockedByCurrentThread());
725	<	assertTrue(lock.getWriteHoldCount() == 1);
726	<	lock.writeLock().lock();
727	<	assertTrue(lock.getWriteHoldCount() == 2);
728	<	lock.writeLock().unlock();
729	<	lock.writeLock().lock();
645	<	lock.writeLock().unlock();
646	<	lock.writeLock().unlock();
647	<	t1.join(MEDIUM_DELAY_MS);
648	<	t2.join(MEDIUM_DELAY_MS);
649	<	assertTrue(!t1.isAlive());
650	<	assertTrue(!t2.isAlive());
651	<
652	<	} catch(Exception e){
653	<	unexpectedException();
654	<	}
655	<	}
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() {
750	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
751	<	lock.readLock().lock();
752	<	Thread t = new Thread(new Runnable() {
753	<	public void run() {
754	<	threadAssertTrue(lock.readLock().tryLock());
755	<	lock.readLock().unlock();
756	<	}
757	<	});
758	<	try {
671	<	t.start();
672	<	t.join();
673	<	lock.readLock().unlock();
674	<	} catch(Exception e){
675	<	unexpectedException();
676	<	}
677	<	}
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	<
760	>	awaitTermination(t);
761	>	lock.readLock().unlock();
762	>	}
763
764		/**
765		* write tryLock fails when readlocked
766		*/
767	<	public void testWriteTryLockWhenReadLocked() {
768	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
769	<	lock.readLock().lock();
770	<	Thread t = new Thread(new Runnable() {
771	<	public void run() {
772	<	threadAssertFalse(lock.writeLock().tryLock());
773	<	}
774	<	});
775	<	try {
693	<	t.start();
694	<	t.join();
695	<	lock.readLock().unlock();
696	<	} catch(Exception e){
697	<	unexpectedException();
698	<	}
699	<	}
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	<
777	>	awaitTermination(t);
778	>	lock.readLock().unlock();
779	>	}
780
781		/**
782		* write timed tryLock times out if locked
783		*/
784	<	public void testWriteTryLock_Timeout() {
785	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
786	<	lock.writeLock().lock();
787	<	Thread t = new Thread(new Runnable() {
788	<	public void run() {
789	<	try {
790	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
791	<	} catch (Exception ex) {
792	<	threadUnexpectedException();
793	<	}
794	<	}
795	<	});
796	<	try {
797	<	t.start();
798	<	t.join();
799	<	lock.writeLock().unlock();
800	<	} catch(Exception e){
723	<	unexpectedException();
724	<	}
725	<	}
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() {
806	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
807	<	lock.writeLock().lock();
808	<	Thread t = new Thread(new Runnable() {
809	<	public void run() {
810	<	try {
811	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
812	<	} catch (Exception ex) {
813	<	threadUnexpectedException();
814	<	}
815	<	}
816	<	});
742	<	try {
743	<	t.start();
744	<	t.join();
745	<	lock.writeLock().unlock();
746	<	} catch(Exception e){
747	<	unexpectedException();
748	<	}
749	<	}
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 lock free else is interruptible
824	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
825		*/
826	<	public void testWriteLockInterruptibly() {
827	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
828	<	try {
829	<	lock.writeLock().lockInterruptibly();
830	<	} catch(Exception e) {
760	<	unexpectedException();
761	<	}
762	<	Thread t = new Thread(new Runnable() {
763	<	public void run() {
764	<	try {
765	<	lock.writeLock().lockInterruptibly();
766	<	threadShouldThrow();
767	<	}
768	<	catch(InterruptedException success) {
769	<	}
770	<	}
771	<	});
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();
776	<	lock.writeLock().unlock();
777	<	} catch(Exception e){
778	<	unexpectedException();
832	>	lock.writeLock().lockInterruptibly();
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		/**
849	<	*  read lockInterruptibly succeeds if lock free else is interruptible
849	>	* read lockInterruptibly succeeds if lock free else is interruptible
850		*/
851	<	public void testReadLockInterruptibly() {
852	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
853	<	try {
854	<	lock.writeLock().lockInterruptibly();
855	<	} catch(Exception e) {
790	<	unexpectedException();
791	<	}
792	<	Thread t = new Thread(new Runnable() {
793	<	public void run() {
794	<	try {
795	<	lock.readLock().lockInterruptibly();
796	<	threadShouldThrow();
797	<	}
798	<	catch(InterruptedException success) {
799	<	}
800	<	}
801	<	});
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	<	t.start();
858	<	t.interrupt();
859	<	t.join();
860	<	lock.writeLock().unlock();
861	<	} catch(Exception e){
808	<	unexpectedException();
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859	>	lock.writeLock().lockInterruptibly();
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		/**
875		* Calling await without holding lock throws IllegalMonitorStateException
876		*/
877	<	public void testAwait_IllegalMonitor() {
878	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	shouldThrow();
885	<	}
886	<	catch (IllegalMonitorStateException success) {
887	<	}
888	<	catch (Exception ex) {
889	<	shouldThrow();
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		/**
894		* Calling signal without holding lock throws IllegalMonitorStateException
895		*/
896	<	public void testSignal_IllegalMonitor() {
897	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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		shouldThrow();
904	<	}
839	<	catch (IllegalMonitorStateException success) {
840	<	}
841	<	catch (Exception ex) {
842	<	unexpectedException();
843	<	}
904	>	} catch (IllegalMonitorStateException success) {}
905		}
906
907		/**
908	<	* awaitNanos without a signal times out
908	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
909		*/
910	<	public void testAwaitNanos_Timeout() {
911	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
859	<	unexpectedException();
939	>	} catch (InterruptedException e) {
940	>	threadUnexpectedException(e);
941		}
942		}
943
863	–
944		/**
945	<	*  timed await without a signal times out
945	>	* timed await without a signal times out
946		*/
947	<	public void testAwait_Timeout() {
948	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
949	<	final Condition c = lock.writeLock().newCondition();
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	+	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) {
875	<	unexpectedException();
960	>	} catch (InterruptedException e) {
961	>	threadUnexpectedException(e);
962		}
963		}
964
965		/**
966		* awaitUntil without a signal times out
967		*/
968	<	public void testAwaitUntil_Timeout() {
969	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
970	<	final Condition c = lock.writeLock().newCondition();
971	<	try {
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() + timeoutMillis)));
980	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
981		lock.writeLock().unlock();
982	<	}
983	<	catch (Exception ex) {
891	<	unexpectedException();
982	>	} catch (InterruptedException e) {
983	>	threadUnexpectedException(e);
984		}
985		}
986
987		/**
988		* await returns when signalled
989		*/
990	<	public void testAwait() {
991	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
909	<	threadUnexpectedException();
910	<	}
911	<	}
912	<	});
913	<
914	<	try {
915	<	t.start();
916	<	Thread.sleep(SHORT_DELAY_MS);
917	<	lock.writeLock().lock();
918	<	c.signal();
919	<	lock.writeLock().unlock();
920	<	t.join(SHORT_DELAY_MS);
921	<	assertFalse(t.isAlive());
922	<	}
923	<	catch (Exception ex) {
924	<	unexpectedException();
925	<	}
926	<	}
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	<	/** A helper class for uninterruptible wait tests */
1006	<	class UninterruptableThread extends Thread {
1007	<	private Lock lock;
1008	<	private Condition c;
1009	<
1010	<	public volatile boolean canAwake = false;
1011	<	public volatile boolean interrupted = false;
1012	<	public volatile boolean lockStarted = false;
936	<
937	<	public UninterruptableThread(Lock lock, Condition c) {
938	<	this.lock = lock;
939	<	this.c = c;
940	<	}
941	<
942	<	public synchronized void run() {
943	<	lock.lock();
944	<	lockStarted = true;
945	<
946	<	while (!canAwake) {
947	<	c.awaitUninterruptibly();
948	<	}
949	<
950	<	interrupted = isInterrupted();
951	<	lock.unlock();
952	<	}
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		/**
1016	<	* awaitUninterruptibly doesn't abort on interrupt
1016	>	* awaitUninterruptibly is uninterruptible
1017		*/
1018	<	public void testAwaitUninterruptibly() {
1019	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1023	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1024
1025	<	try {
1026	<	thread.start();
1027	<
1028	<	while (!thread.lockStarted) {
1029	<	Thread.sleep(100);
1030	<	}
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	<	lock.writeLock().lock();
1037	<	try {
1038	<	thread.interrupt();
1039	<	thread.canAwake = true;
1040	<	c.signal();
1041	<	} finally {
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	<	}
1044	>	}});
1045
1046	<	thread.join();
1047	<	assertTrue(thread.interrupted);
1048	<	assertFalse(thread.isAlive());
1049	<	} catch (Exception ex) {
1050	<	unexpectedException();
1051	<	}
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		/**
1063	<	* await is interruptible
1063	>	* await/awaitNanos/awaitUntil is interruptible
1064		*/
1065	<	public void testAwait_Interrupt() {
1066	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	try {
1080	<	lock.writeLock().lock();
1081	<	c.await();
1082	<	lock.writeLock().unlock();
1083	<	threadShouldThrow();
1084	<	}
1085	<	catch(InterruptedException success) {
1086	<	}
1087	<	}
1088	<	});
1089	<
1090	<	try {
1091	<	t.start();
1092	<	Thread.sleep(SHORT_DELAY_MS);
1093	<	t.interrupt();
1094	<	t.join(SHORT_DELAY_MS);
1095	<	assertFalse(t.isAlive());
1096	<	}
1097	<	catch (Exception ex) {
1098	<	unexpectedException();
1015	<	}
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	>	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	<	* awaitNanos is interruptible
1102	>	* signalAll wakes up all threads
1103		*/
1104	<	public void testAwaitNanos_Interrupt() {
1105	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	Thread t = new Thread(new Runnable() {
1117	<	public void run() {
1118	<	try {
1119	<	lock.writeLock().lock();
1120	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1121	<	lock.writeLock().unlock();
1122	<	threadShouldThrow();
1123	<	}
1124	<	catch(InterruptedException success) {
1033	<	}
1034	<	}
1035	<	});
1036	<
1037	<	try {
1038	<	t.start();
1039	<	Thread.sleep(SHORT_DELAY_MS);
1040	<	t.interrupt();
1041	<	t.join(SHORT_DELAY_MS);
1042	<	assertFalse(t.isAlive());
1043	<	}
1044	<	catch (Exception ex) {
1045	<	unexpectedException();
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	<	* awaitUntil is interruptible
1142	<	*/
1143	<	public void testAwaitUntil_Interrupt() {
1144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	Thread t = new Thread(new Runnable() {
1150	<	public void run() {
1151	<	try {
1152	<	lock.writeLock().lock();
1153	<	java.util.Date d = new java.util.Date();
1154	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1155	<	lock.writeLock().unlock();
1156	<	threadShouldThrow();
1157	<	}
1158	<	catch(InterruptedException success) {
1159	<	}
1160	<	}
1161	<	});
1162	<
1163	<	try {
1164	<	t.start();
1165	<	Thread.sleep(SHORT_DELAY_MS);
1166	<	t.interrupt();
1167	<	t.join(SHORT_DELAY_MS);
1168	<	assertFalse(t.isAlive());
1169	<	}
1170	<	catch (Exception ex) {
1171	<	unexpectedException();
1172	<	}
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	<	* signalAll wakes up all threads
1190	<	*/
1191	<	public void testSignalAll() {
1192	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	Thread t1 = new Thread(new Runnable() {
1198	<	public void run() {
1199	<	try {
1200	<	lock.writeLock().lock();
1201	<	c.await();
1202	<	lock.writeLock().unlock();
1203	<	}
1204	<	catch(InterruptedException e) {
1205	<	threadUnexpectedException();
1206	<	}
1207	<	}
1208	<	});
1099	<
1100	<	Thread t2 = new Thread(new Runnable() {
1101	<	public void run() {
1102	<	try {
1103	<	lock.writeLock().lock();
1104	<	c.await();
1105	<	lock.writeLock().unlock();
1106	<	}
1107	<	catch(InterruptedException e) {
1108	<	threadUnexpectedException();
1109	<	}
1110	<	}
1111	<	});
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	<	try {
1211	<	t1.start();
1212	<	t2.start();
1213	<	Thread.sleep(SHORT_DELAY_MS);
1214	<	lock.writeLock().lock();
1215	<	c.signalAll();
1216	<	lock.writeLock().unlock();
1217	<	t1.join(SHORT_DELAY_MS);
1218	<	t2.join(SHORT_DELAY_MS);
1219	<	assertFalse(t1.isAlive());
1220	<	assertFalse(t2.isAlive());
1221	<	}
1222	<	catch (Exception ex) {
1223	<	unexpectedException();
1224	<	}
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() {
1238	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1239	<	l.readLock().lock();
1240	<	l.readLock().unlock();
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	<	try {
1245	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1246	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1247	<	out.writeObject(l);
1248	<	out.close();
1249	<
1250	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1251	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1252	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1253	<	r.readLock().lock();
1254	<	r.readLock().unlock();
1255	<	} catch(Exception e){
1256	<	e.printStackTrace();
1257	<	unexpectedException();
1258	<	}
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() {
1265	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	try {
1272	<	assertFalse(lock.hasQueuedThreads());
1273	<	lock.writeLock().lock();
1274	<	t1.start();
1275	<	Thread.sleep(SHORT_DELAY_MS);
1276	<	assertTrue(lock.hasQueuedThreads());
1277	<	t2.start();
1278	<	Thread.sleep(SHORT_DELAY_MS);
1279	<	assertTrue(lock.hasQueuedThreads());
1280	<	t1.interrupt();
1281	<	Thread.sleep(SHORT_DELAY_MS);
1282	<	assertTrue(lock.hasQueuedThreads());
1283	<	lock.writeLock().unlock();
1284	<	Thread.sleep(SHORT_DELAY_MS);
1285	<	assertFalse(lock.hasQueuedThreads());
1286	<	t1.join();
1178	<	t2.join();
1179	<	} catch(Exception e){
1180	<	unexpectedException();
1181	<	}
1182	<	}
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() {
1292	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
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	<	sync.hasQueuedThread(null);
1296	>	lock.hasQueuedThread(null);
1297		shouldThrow();
1298	<	} catch (NullPointerException success) {
1193	<	}
1298	>	} catch (NullPointerException success) {}
1299		}
1300
1301		/**
1302	<	* hasQueuedThread reports whether a thread is queued.
1302	>	* hasQueuedThread reports whether a thread is queued
1303		*/
1304	<	public void testHasQueuedThread() {
1305	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1306	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1307	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1308	<	try {
1309	<	assertFalse(sync.hasQueuedThread(t1));
1310	<	assertFalse(sync.hasQueuedThread(t2));
1311	<	sync.writeLock().lock();
1312	<	t1.start();
1313	<	Thread.sleep(SHORT_DELAY_MS);
1314	<	assertTrue(sync.hasQueuedThread(t1));
1315	<	t2.start();
1316	<	Thread.sleep(SHORT_DELAY_MS);
1317	<	assertTrue(sync.hasQueuedThread(t1));
1318	<	assertTrue(sync.hasQueuedThread(t2));
1319	<	t1.interrupt();
1320	<	Thread.sleep(SHORT_DELAY_MS);
1321	<	assertFalse(sync.hasQueuedThread(t1));
1322	<	assertTrue(sync.hasQueuedThread(t2));
1323	<	sync.writeLock().unlock();
1324	<	Thread.sleep(SHORT_DELAY_MS);
1325	<	assertFalse(sync.hasQueuedThread(t1));
1326	<	Thread.sleep(SHORT_DELAY_MS);
1327	<	assertFalse(sync.hasQueuedThread(t2));
1328	<	t1.join();
1329	<	t2.join();
1330	<	} catch(Exception e){
1226	<	unexpectedException();
1227	<	}
1228	<	}
1229	<
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() {
1336	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	try {
1343	<	assertEquals(0, lock.getQueueLength());
1344	<	lock.writeLock().lock();
1345	<	t1.start();
1346	<	Thread.sleep(SHORT_DELAY_MS);
1347	<	assertEquals(1, lock.getQueueLength());
1348	<	t2.start();
1349	<	Thread.sleep(SHORT_DELAY_MS);
1350	<	assertEquals(2, lock.getQueueLength());
1351	<	t1.interrupt();
1352	<	Thread.sleep(SHORT_DELAY_MS);
1353	<	assertEquals(1, lock.getQueueLength());
1354	<	lock.writeLock().unlock();
1355	<	Thread.sleep(SHORT_DELAY_MS);
1356	<	assertEquals(0, lock.getQueueLength());
1253	<	t1.join();
1254	<	t2.join();
1255	<	} catch(Exception e){
1256	<	unexpectedException();
1257	<	}
1258	<	}
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() {
1362	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
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	<	try {
1369	<	assertTrue(lock.getQueuedThreads().isEmpty());
1370	<	lock.writeLock().lock();
1371	<	assertTrue(lock.getQueuedThreads().isEmpty());
1372	<	t1.start();
1373	<	Thread.sleep(SHORT_DELAY_MS);
1374	<	assertTrue(lock.getQueuedThreads().contains(t1));
1375	<	t2.start();
1376	<	Thread.sleep(SHORT_DELAY_MS);
1377	<	assertTrue(lock.getQueuedThreads().contains(t1));
1378	<	assertTrue(lock.getQueuedThreads().contains(t2));
1379	<	t1.interrupt();
1380	<	Thread.sleep(SHORT_DELAY_MS);
1381	<	assertFalse(lock.getQueuedThreads().contains(t1));
1382	<	assertTrue(lock.getQueuedThreads().contains(t2));
1383	<	lock.writeLock().unlock();
1384	<	Thread.sleep(SHORT_DELAY_MS);
1385	<	assertTrue(lock.getQueuedThreads().isEmpty());
1386	<	t1.join();
1387	<	t2.join();
1388	<	} catch(Exception e){
1288	<	unexpectedException();
1289	<	}
1290	<	}
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() {
1394	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
1301	<	} catch (Exception ex) {
1302	<	unexpectedException();
1303	<	}
1400	>	} catch (NullPointerException success) {}
1401		}
1402
1403		/**
1404		* getWaitQueueLength throws NPE if null
1405		*/
1406	<	public void testGetWaitQueueLengthNPE() {
1407	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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) {
1315	<	} catch (Exception ex) {
1316	<	unexpectedException();
1317	<	}
1413	>	} catch (NullPointerException success) {}
1414		}
1415
1320	–
1416		/**
1417		* getWaitingThreads throws NPE if null
1418		*/
1419	<	public void testGetWaitingThreadsNPE() {
1420	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
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) {
1330	<	} catch (Exception ex) {
1331	<	unexpectedException();
1332	<	}
1426	>	} catch (NullPointerException success) {}
1427		}
1428
1429		/**
1430	<	* hasWaiters throws IAE if not owned
1430	>	* hasWaiters throws IllegalArgumentException if not owned
1431		*/
1432	<	public void testHasWaitersIAE() {
1433	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1434	<	final Condition c = (lock.writeLock().newCondition());
1435	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
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		lock2.hasWaiters(c);
1440		shouldThrow();
1441	<	} catch (IllegalArgumentException success) {
1346	<	} catch (Exception ex) {
1347	<	unexpectedException();
1348	<	}
1441	>	} catch (IllegalArgumentException success) {}
1442		}
1443
1444		/**
1445	<	* hasWaiters throws IMSE if not locked
1445	>	* hasWaiters throws IllegalMonitorStateException if not locked
1446		*/
1447	<	public void testHasWaitersIMSE() {
1448	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1449	<	final Condition c = (lock.writeLock().newCondition());
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) {
1361	<	} catch (Exception ex) {
1362	<	unexpectedException();
1363	<	}
1455	>	} catch (IllegalMonitorStateException success) {}
1456		}
1457
1366	–
1458		/**
1459	<	* getWaitQueueLength throws IAE if not owned
1459	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1460		*/
1461	<	public void testGetWaitQueueLengthIAE() {
1462	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1463	<	final Condition c = (lock.writeLock().newCondition());
1464	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
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) {
1378	<	} catch (Exception ex) {
1379	<	unexpectedException();
1380	<	}
1470	>	} catch (IllegalArgumentException success) {}
1471		}
1472
1473		/**
1474	<	* getWaitQueueLength throws IMSE if not locked
1474	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1475		*/
1476	<	public void testGetWaitQueueLengthIMSE() {
1477	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1478	<	final Condition c = (lock.writeLock().newCondition());
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) {
1393	<	} catch (Exception ex) {
1394	<	unexpectedException();
1395	<	}
1484	>	} catch (IllegalMonitorStateException success) {}
1485		}
1486
1398	–
1487		/**
1488	<	* getWaitingThreads throws IAE if not owned
1488	>	* getWaitingThreads throws IllegalArgumentException if not owned
1489		*/
1490	<	public void testGetWaitingThreadsIAE() {
1491	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1492	<	final Condition c = (lock.writeLock().newCondition());
1493	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
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) {
1410	<	} catch (Exception ex) {
1411	<	unexpectedException();
1412	<	}
1501	>	} catch (IllegalArgumentException success) {}
1502		}
1503
1504		/**
1505	<	* getWaitingThreads throws IMSE if not locked
1505	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1506		*/
1507	<	public void testGetWaitingThreadsIMSE() {
1508	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1509	<	final Condition c = (lock.writeLock().newCondition());
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) {
1425	<	} catch (Exception ex) {
1426	<	unexpectedException();
1427	<	}
1516	>	} catch (IllegalMonitorStateException success) {}
1517		}
1518
1430	–
1519		/**
1520		* hasWaiters returns true when a thread is waiting, else false
1521		*/
1522	<	public void testHasWaiters() {
1523	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1524	<	final Condition c = (lock.writeLock().newCondition());
1525	<	Thread t = new Thread(new Runnable() {
1526	<	public void run() {
1527	<	try {
1528	<	lock.writeLock().lock();
1529	<	threadAssertFalse(lock.hasWaiters(c));
1530	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1531	<	c.await();
1532	<	lock.writeLock().unlock();
1533	<	}
1534	<	catch(InterruptedException e) {
1535	<	threadUnexpectedException();
1536	<	}
1537	<	}
1538	<	});
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	<	try {
1542	<	t.start();
1543	<	Thread.sleep(SHORT_DELAY_MS);
1544	<	lock.writeLock().lock();
1545	<	assertTrue(lock.hasWaiters(c));
1546	<	assertEquals(1, lock.getWaitQueueLength(c));
1547	<	c.signal();
1548	<	lock.writeLock().unlock();
1549	<	Thread.sleep(SHORT_DELAY_MS);
1550	<	lock.writeLock().lock();
1462	<	assertFalse(lock.hasWaiters(c));
1463	<	assertEquals(0, lock.getWaitQueueLength(c));
1464	<	lock.writeLock().unlock();
1465	<	t.join(SHORT_DELAY_MS);
1466	<	assertFalse(t.isAlive());
1467	<	}
1468	<	catch (Exception ex) {
1469	<	unexpectedException();
1470	<	}
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() {
1557	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1558	<	final Condition c = (lock.writeLock().newCondition());
1559	<	Thread t = new Thread(new Runnable() {
1560	<	public void run() {
1561	<	try {
1562	<	lock.writeLock().lock();
1563	<	threadAssertFalse(lock.hasWaiters(c));
1564	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1565	<	c.await();
1566	<	lock.writeLock().unlock();
1567	<	}
1568	<	catch(InterruptedException e) {
1569	<	threadUnexpectedException();
1570	<	}
1491	<	}
1492	<	});
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	<	try {
1573	<	t.start();
1574	<	Thread.sleep(SHORT_DELAY_MS);
1575	<	lock.writeLock().lock();
1576	<	assertTrue(lock.hasWaiters(c));
1577	<	assertEquals(1, lock.getWaitQueueLength(c));
1578	<	c.signal();
1579	<	lock.writeLock().unlock();
1580	<	Thread.sleep(SHORT_DELAY_MS);
1503	<	lock.writeLock().lock();
1504	<	assertFalse(lock.hasWaiters(c));
1505	<	assertEquals(0, lock.getWaitQueueLength(c));
1506	<	lock.writeLock().unlock();
1507	<	t.join(SHORT_DELAY_MS);
1508	<	assertFalse(t.isAlive());
1509	<	}
1510	<	catch (Exception ex) {
1511	<	unexpectedException();
1512	<	}
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
1515	–
1583		/**
1584		* getWaitingThreads returns only and all waiting threads
1585		*/
1586	<	public void testGetWaitingThreads() {
1587	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
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	<	Thread t1 = new Thread(new Runnable() {
1593	<	public void run() {
1594	<	try {
1595	<	lock.writeLock().lock();
1596	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1597	<	c.await();
1598	<	lock.writeLock().unlock();
1599	<	}
1600	<	catch(InterruptedException e) {
1601	<	threadUnexpectedException();
1532	<	}
1533	<	}
1534	<	});
1535	<
1536	<	Thread t2 = new Thread(new Runnable() {
1537	<	public void run() {
1538	<	try {
1539	<	lock.writeLock().lock();
1540	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1541	<	c.await();
1542	<	lock.writeLock().unlock();
1543	<	}
1544	<	catch(InterruptedException e) {
1545	<	threadUnexpectedException();
1546	<	}
1547	<	}
1548	<	});
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	<	try {
1604	<	lock.writeLock().lock();
1605	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1606	<	lock.writeLock().unlock();
1607	<	t1.start();
1608	<	Thread.sleep(SHORT_DELAY_MS);
1609	<	t2.start();
1610	<	Thread.sleep(SHORT_DELAY_MS);
1611	<	lock.writeLock().lock();
1612	<	assertTrue(lock.hasWaiters(c));
1613	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1614	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1615	<	c.signalAll();
1616	<	lock.writeLock().unlock();
1617	<	Thread.sleep(SHORT_DELAY_MS);
1618	<	lock.writeLock().lock();
1619	<	assertFalse(lock.hasWaiters(c));
1620	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1621	<	lock.writeLock().unlock();
1622	<	t1.join(SHORT_DELAY_MS);
1623	<	t2.join(SHORT_DELAY_MS);
1624	<	assertFalse(t1.isAlive());
1625	<	assertFalse(t2.isAlive());
1626	<	}
1627	<	catch (Exception ex) {
1628	<	unexpectedException();
1629	<	}
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() {
1640	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1641	<	String us = lock.toString();
1642	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1643	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1644	<	lock.writeLock().lock();
1645	<	String ws = lock.toString();
1646	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1647	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
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	<	String rs = lock.toString();
1652	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1596	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
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() {
1659	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1660	<	String us = lock.readLock().toString();
1661	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
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	<	String rs = lock.readLock().toString();
1609	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1665	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1666		}
1667
1668		/**
1669		* writeLock.toString indicates current lock state
1670		*/
1671	<	public void testWriteLockToString() {
1672	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1673	<	String us = lock.writeLock().toString();
1674	<	assertTrue(us.indexOf("Unlocked") >= 0);
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	<	String ls = lock.writeLock().toString();
1678	<	assertTrue(ls.indexOf("Locked") >= 0);
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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