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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.12 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.71 by jsr166, Fri Feb 27 21:43:18 2015 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> 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);
71	<	assertTrue(r2.isFair());
72	<	assertFalse(r2.isWriteLocked());
73	<	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());
88	<	assertEquals(0, rl.getReadLockCount());
89	<	rl.readLock().lock();
90	<	assertFalse(rl.isWriteLocked());
91	<	assertFalse(rl.isWriteLockedByCurrentThread());
92	<	assertEquals(1, rl.getReadLockCount());
93	<	rl.readLock().unlock();
94	<	assertFalse(rl.isWriteLocked());
95	<	assertFalse(rl.isWriteLockedByCurrentThread());
96	<	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());
115	<	assertFalse(rl.isWriteLockedByCurrentThread());
116	<	assertEquals(1, rl.getReadLockCount());
117	<	rl.readLock().unlock();
118	<	assertFalse(rl.isWriteLocked());
119	<	assertFalse(rl.isWriteLockedByCurrentThread());
120	<	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 testGetHoldCount() {
130	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
128	<	for(int i = 1; i <= SIZE; i++) {
129	<	lock.writeLock().lock();
130	<	assertEquals(i,lock.getWriteHoldCount());
131	<	}
132	<	for(int i = SIZE; i > 0; i--) {
133	<	lock.writeLock().unlock();
134	<	assertEquals(i-1,lock.getWriteHoldCount());
135	<	}
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131		}
137	–
132
133		/**
134	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
134	>	* Checks that condition c has no waiters.
135	>	*/
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139	>
140	>	/**
141	>	* Checks that condition c has exactly the given waiter threads.
142		*/
143	<	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	<	lock.writeLock().lock();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	lock.writeLock().lockInterruptibly();
167	<	threadShouldThrow();
168	<	} catch(InterruptedException success){}
169	<	}
170	<	});
171	<	try {
172	<	t.start();
173	<	t.interrupt();
174	<	lock.writeLock().unlock();
175	<	t.join();
176	<	} catch(Exception e){
177	<	unexpectedException();
178	<	}
173	<	}
174	<
175	<	/**
176	<	* timed write-trylock is interruptible
177	<	*/
178	<	public void testWriteTryLock_Interrupted() {
179	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
180	<	lock.writeLock().lock();
181	<	Thread t = new Thread(new Runnable() {
182	<	public void run() {
183	<	try {
184	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
185	<	threadShouldThrow();
186	<	} catch(InterruptedException success){}
187	<	}
188	<	});
189	<	try {
190	<	t.start();
191	<	t.interrupt();
192	<	lock.writeLock().unlock();
193	<	t.join();
194	<	} catch(Exception e){
195	<	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		}
181
182		/**
183	<	* read-lockInterruptibly is interruptible
183	>	* Constructor sets given fairness, and is in unlocked state
184		*/
185	<	public void testReadLockInterruptibly_Interrupted() {
186	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
187	<	lock.writeLock().lock();
188	<	Thread t = new Thread(new Runnable() {
189	<	public void run() {
190	<	try {
191	<	lock.readLock().lockInterruptibly();
192	<	threadShouldThrow();
193	<	} catch(InterruptedException success){}
194	<	}
195	<	});
196	<	try {
197	<	t.start();
198	<	t.interrupt();
199	<	lock.writeLock().unlock();
200	<	t.join();
201	<	} catch(Exception e){
219	<	unexpectedException();
220	<	}
221	<	}
222	<
223	<	/**
224	<	* timed read-trylock is interruptible
225	<	*/
226	<	public void testReadTryLock_Interrupted() {
227	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
228	<	lock.writeLock().lock();
229	<	Thread t = new Thread(new Runnable() {
230	<	public void run() {
231	<	try {
232	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
233	<	threadShouldThrow();
234	<	} catch(InterruptedException success){}
235	<	}
236	<	});
237	<	try {
238	<	t.start();
239	<	t.interrupt();
240	<	t.join();
241	<	} catch(Exception e){
242	<	unexpectedException();
243	<	}
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	<	/**
206	<	* write-trylock fails if locked
207	<	*/
208	<	public void testWriteTryLockWhenLocked() {
209	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
210	<	lock.writeLock().lock();
211	<	Thread t = new Thread(new Runnable() {
212	<	public void run() {
213	<	threadAssertFalse(lock.writeLock().tryLock());
214	<	}
215	<	});
216	<	try {
217	<	t.start();
218	<	t.join();
204	>	/**
205	>	* write-locking and read-locking an unlocked lock succeed
206	>	*/
207	>	public void testLock()      { testLock(false); }
208	>	public void testLock_fair() { testLock(true); }
209	>	public void testLock(boolean fair) {
210	>	PublicReentrantReadWriteLock lock =
211	>	new PublicReentrantReadWriteLock(fair);
212	>	assertNotWriteLocked(lock);
213	>	lock.writeLock().lock();
214	>	assertWriteLockedByMoi(lock);
215	>	lock.writeLock().unlock();
216	>	assertNotWriteLocked(lock);
217	>	assertEquals(0, lock.getReadLockCount());
218	>	lock.readLock().lock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(1, lock.getReadLockCount());
221	>	lock.readLock().unlock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(0, lock.getReadLockCount());
224	>	}
225	>
226	>	/**
227	>	* getWriteHoldCount returns number of recursive holds
228	>	*/
229	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
230	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
231	>	public void testGetWriteHoldCount(boolean fair) {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.writeLock().lock();
235	>	assertEquals(i,lock.getWriteHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238		lock.writeLock().unlock();
239	<	} catch(Exception e){
263	<	unexpectedException();
239	>	assertEquals(i-1,lock.getWriteHoldCount());
240		}
241	<	}
241	>	}
242
243		/**
244	<	* read-trylock fails if locked
244	>	* writelock.getHoldCount returns number of recursive holds
245		*/
246	<	public void testReadTryLockWhenLocked() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	<	lock.writeLock().lock();
249	<	Thread t = new Thread(new Runnable() {
250	<	public void run() {
251	<	threadAssertFalse(lock.readLock().tryLock());
252	<	}
253	<	});
254	<	try {
279	<	t.start();
280	<	t.join();
246	>	public void testGetHoldCount()      { testGetHoldCount(false); }
247	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
248	>	public void testGetHoldCount(boolean fair) {
249	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
250	>	for (int i = 1; i <= SIZE; i++) {
251	>	lock.writeLock().lock();
252	>	assertEquals(i,lock.writeLock().getHoldCount());
253	>	}
254	>	for (int i = SIZE; i > 0; i--) {
255		lock.writeLock().unlock();
256	<	} catch(Exception e){
283	<	unexpectedException();
256	>	assertEquals(i-1,lock.writeLock().getHoldCount());
257		}
258	<	}
258	>	}
259
260		/**
261	<	* Multiple threads can hold a read lock when not write-locked
261	>	* getReadHoldCount returns number of recursive holds
262		*/
263	<	public void testMultipleReadLocks() {
264	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
265	<	lock.readLock().lock();
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run() {
268	<	threadAssertTrue(lock.readLock().tryLock());
269	<	lock.readLock().unlock();
270	<	}
271	<	});
299	<	try {
300	<	t.start();
301	<	t.join();
263	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
264	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
265	>	public void testGetReadHoldCount(boolean fair) {
266	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
267	>	for (int i = 1; i <= SIZE; i++) {
268	>	lock.readLock().lock();
269	>	assertEquals(i,lock.getReadHoldCount());
270	>	}
271	>	for (int i = SIZE; i > 0; i--) {
272		lock.readLock().unlock();
273	<	} catch(Exception e){
304	<	unexpectedException();
273	>	assertEquals(i-1,lock.getReadHoldCount());
274		}
275	<	}
275	>	}
276
277		/**
278	<	* A writelock succeeds after reading threads unlock
278	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
279		*/
280	<	public void testWriteAfterMultipleReadLocks() {
281	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
282	<	lock.readLock().lock();
283	<	Thread t1 = new Thread(new Runnable() {
315	<	public void run() {
316	<	lock.readLock().lock();
317	<	lock.readLock().unlock();
318	<	}
319	<	});
320	<	Thread t2 = new Thread(new Runnable() {
321	<	public void run() {
322	<	lock.writeLock().lock();
323	<	lock.writeLock().unlock();
324	<	}
325	<	});
326	<
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 {
328	–	t1.start();
329	–	t2.start();
330	–	Thread.sleep(SHORT_DELAY_MS);
331	–	lock.readLock().unlock();
332	–	t1.join(MEDIUM_DELAY_MS);
333	–	t2.join(MEDIUM_DELAY_MS);
334	–	assertTrue(!t1.isAlive());
335	–	assertTrue(!t2.isAlive());
336	–
337	–	} catch(Exception e){
338	–	unexpectedException();
339	–	}
340	–	}
341	–
342	–	/**
343	–	* Readlocks succeed after a writing thread unlocks
344	–	*/
345	–	public void testReadAfterWriteLock() {
346	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
347	–	lock.writeLock().lock();
348	–	Thread t1 = new Thread(new Runnable() {
349	–	public void run() {
350	–	lock.readLock().lock();
351	–	lock.readLock().unlock();
352	–	}
353	–	});
354	–	Thread t2 = new Thread(new Runnable() {
355	–	public void run() {
356	–	lock.readLock().lock();
357	–	lock.readLock().unlock();
358	–	}
359	–	});
360	–
361	–	try {
362	–	t1.start();
363	–	t2.start();
364	–	Thread.sleep(SHORT_DELAY_MS);
285		lock.writeLock().unlock();
286	<	t1.join(MEDIUM_DELAY_MS);
287	<	t2.join(MEDIUM_DELAY_MS);
288	<	assertTrue(!t1.isAlive());
369	<	assertTrue(!t2.isAlive());
370	<
371	<	} catch(Exception e){
372	<	unexpectedException();
373	<	}
374	<	}
375	<
286	>	shouldThrow();
287	>	} catch (IllegalMonitorStateException success) {}
288	>	}
289
290		/**
291	<	* Read trylock succeeds if readlocked but not writelocked
292	<	*/
293	<	public void testTryLockWhenReadLocked() {
294	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
295	<	lock.readLock().lock();
296	<	Thread t = new Thread(new Runnable() {
384	<	public void run() {
385	<	threadAssertTrue(lock.readLock().tryLock());
386	<	lock.readLock().unlock();
387	<	}
388	<	});
291	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
292	>	*/
293	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
294	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
295	>	public void testReadUnlock_IMSE(boolean fair) {
296	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
297		try {
390	–	t.start();
391	–	t.join();
298		lock.readLock().unlock();
299	<	} catch(Exception e){
300	<	unexpectedException();
301	<	}
396	<	}
397	<
398	<
299	>	shouldThrow();
300	>	} catch (IllegalMonitorStateException success) {}
301	>	}
302
303		/**
304	<	* write trylock fails when readlocked
304	>	* write-lockInterruptibly is interruptible
305		*/
306	<	public void testWriteTryLockWhenReadLocked() {
307	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
308	<	lock.readLock().lock();
309	<	Thread t = new Thread(new Runnable() {
310	<	public void run() {
311	<	threadAssertFalse(lock.writeLock().tryLock());
312	<	}
313	<	});
314	<	try {
315	<	t.start();
413	<	t.join();
414	<	lock.readLock().unlock();
415	<	} catch(Exception e){
416	<	unexpectedException();
417	<	}
418	<	}
306	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
307	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
308	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
309	>	final PublicReentrantReadWriteLock lock =
310	>	new PublicReentrantReadWriteLock(fair);
311	>	lock.writeLock().lock();
312	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
313	>	public void realRun() throws InterruptedException {
314	>	lock.writeLock().lockInterruptibly();
315	>	}});
316
317	<
317	>	waitForQueuedThread(lock, t);
318	>	t.interrupt();
319	>	awaitTermination(t);
320	>	releaseWriteLock(lock);
321	>	}
322
323		/**
324	<	* write timed trylock times out if locked
325	<	*/
326	<	public void testWriteTryLock_Timeout() {
327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
328	<	lock.writeLock().lock();
329	<	Thread t = new Thread(new Runnable() {
330	<	public void run() {
331	<	try {
332	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
333	<	} catch (Exception ex) {
334	<	threadUnexpectedException();
335	<	}
336	<	}
337	<	});
338	<	try {
339	<	t.start();
340	<	t.join();
341	<	lock.writeLock().unlock();
441	<	} catch(Exception e){
442	<	unexpectedException();
443	<	}
444	<	}
324	>	* timed write-tryLock is interruptible
325	>	*/
326	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
327	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
328	>	public void testWriteTryLock_Interruptible(boolean fair) {
329	>	final PublicReentrantReadWriteLock lock =
330	>	new PublicReentrantReadWriteLock(fair);
331	>	lock.writeLock().lock();
332	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
333	>	public void realRun() throws InterruptedException {
334	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
335	>	}});
336	>
337	>	waitForQueuedThread(lock, t);
338	>	t.interrupt();
339	>	awaitTermination(t);
340	>	releaseWriteLock(lock);
341	>	}
342
343		/**
344	<	* read timed trylock times out if write-locked
344	>	* read-lockInterruptibly is interruptible
345		*/
346	<	public void testReadTryLock_Timeout() {
347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
348	<	lock.writeLock().lock();
349	<	Thread t = new Thread(new Runnable() {
350	<	public void run() {
351	<	try {
352	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
353	<	} catch (Exception ex) {
354	<	threadUnexpectedException();
355	<	}
356	<	}
357	<	});
358	<	try {
359	<	t.start();
360	<	t.join();
361	<	lock.writeLock().unlock();
362	<	} catch(Exception e){
363	<	unexpectedException();
364	<	}
365	<	}
346	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
347	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
348	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
349	>	final PublicReentrantReadWriteLock lock =
350	>	new PublicReentrantReadWriteLock(fair);
351	>	lock.writeLock().lock();
352	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
353	>	public void realRun() throws InterruptedException {
354	>	lock.readLock().lockInterruptibly();
355	>	}});
356	>
357	>	waitForQueuedThread(lock, t);
358	>	t.interrupt();
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361	>	}
362	>
363	>	/**
364	>	* timed read-tryLock is interruptible
365	>	*/
366	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
367	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
368	>	public void testReadTryLock_Interruptible(boolean fair) {
369	>	final PublicReentrantReadWriteLock lock =
370	>	new PublicReentrantReadWriteLock(fair);
371	>	lock.writeLock().lock();
372	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
373	>	public void realRun() throws InterruptedException {
374	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
375	>	}});
376	>
377	>	waitForQueuedThread(lock, t);
378	>	t.interrupt();
379	>	awaitTermination(t);
380	>	releaseWriteLock(lock);
381	>	}
382	>
383	>	/**
384	>	* write-tryLock on an unlocked lock succeeds
385	>	*/
386	>	public void testWriteTryLock()      { testWriteTryLock(false); }
387	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
388	>	public void testWriteTryLock(boolean fair) {
389	>	final PublicReentrantReadWriteLock lock =
390	>	new PublicReentrantReadWriteLock(fair);
391	>	assertTrue(lock.writeLock().tryLock());
392	>	assertWriteLockedByMoi(lock);
393	>	assertTrue(lock.writeLock().tryLock());
394	>	assertWriteLockedByMoi(lock);
395	>	lock.writeLock().unlock();
396	>	releaseWriteLock(lock);
397	>	}
398	>
399	>	/**
400	>	* write-tryLock fails if locked
401	>	*/
402	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
403	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
404	>	public void testWriteTryLockWhenLocked(boolean fair) {
405	>	final PublicReentrantReadWriteLock lock =
406	>	new PublicReentrantReadWriteLock(fair);
407	>	lock.writeLock().lock();
408	>	Thread t = newStartedThread(new CheckedRunnable() {
409	>	public void realRun() {
410	>	assertFalse(lock.writeLock().tryLock());
411	>	}});
412	>
413	>	awaitTermination(t);
414	>	releaseWriteLock(lock);
415	>	}
416	>
417	>	/**
418	>	* read-tryLock fails if locked
419	>	*/
420	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
421	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
422	>	public void testReadTryLockWhenLocked(boolean fair) {
423	>	final PublicReentrantReadWriteLock lock =
424	>	new PublicReentrantReadWriteLock(fair);
425	>	lock.writeLock().lock();
426	>	Thread t = newStartedThread(new CheckedRunnable() {
427	>	public void realRun() {
428	>	assertFalse(lock.readLock().tryLock());
429	>	}});
430
431	+	awaitTermination(t);
432	+	releaseWriteLock(lock);
433	+	}
434
435		/**
436	<	* write lockInterruptibly succeeds if lock free else is interruptible
436	>	* Multiple threads can hold a read lock when not write-locked
437		*/
438	<	public void testWriteLockInterruptibly() {
439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	<	try {
438	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
439	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
440	>	public void testMultipleReadLocks(boolean fair) {
441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
442	>	lock.readLock().lock();
443	>	Thread t = newStartedThread(new CheckedRunnable() {
444	>	public void realRun() throws InterruptedException {
445	>	assertTrue(lock.readLock().tryLock());
446	>	lock.readLock().unlock();
447	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
448	>	lock.readLock().unlock();
449	>	lock.readLock().lock();
450	>	lock.readLock().unlock();
451	>	}});
452	>
453	>	awaitTermination(t);
454	>	lock.readLock().unlock();
455	>	}
456	>
457	>	/**
458	>	* A writelock succeeds only after a reading thread unlocks
459	>	*/
460	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
461	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
462	>	public void testWriteAfterReadLock(boolean fair) {
463	>	final PublicReentrantReadWriteLock lock =
464	>	new PublicReentrantReadWriteLock(fair);
465	>	lock.readLock().lock();
466	>	Thread t = newStartedThread(new CheckedRunnable() {
467	>	public void realRun() {
468	>	assertEquals(1, lock.getReadLockCount());
469	>	lock.writeLock().lock();
470	>	assertEquals(0, lock.getReadLockCount());
471	>	lock.writeLock().unlock();
472	>	}});
473	>	waitForQueuedThread(lock, t);
474	>	assertNotWriteLocked(lock);
475	>	assertEquals(1, lock.getReadLockCount());
476	>	lock.readLock().unlock();
477	>	assertEquals(0, lock.getReadLockCount());
478	>	awaitTermination(t);
479	>	assertNotWriteLocked(lock);
480	>	}
481	>
482	>	/**
483	>	* A writelock succeeds only after reading threads unlock
484	>	*/
485	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
486	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
487	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
488	>	final PublicReentrantReadWriteLock lock =
489	>	new PublicReentrantReadWriteLock(fair);
490	>	lock.readLock().lock();
491	>	lock.readLock().lock();
492	>	Thread t1 = newStartedThread(new CheckedRunnable() {
493	>	public void realRun() {
494	>	lock.readLock().lock();
495	>	assertEquals(3, lock.getReadLockCount());
496	>	lock.readLock().unlock();
497	>	}});
498	>	awaitTermination(t1);
499	>
500	>	Thread t2 = newStartedThread(new CheckedRunnable() {
501	>	public void realRun() {
502	>	assertEquals(2, lock.getReadLockCount());
503	>	lock.writeLock().lock();
504	>	assertEquals(0, lock.getReadLockCount());
505	>	lock.writeLock().unlock();
506	>	}});
507	>	waitForQueuedThread(lock, t2);
508	>	assertNotWriteLocked(lock);
509	>	assertEquals(2, lock.getReadLockCount());
510	>	lock.readLock().unlock();
511	>	lock.readLock().unlock();
512	>	assertEquals(0, lock.getReadLockCount());
513	>	awaitTermination(t2);
514	>	assertNotWriteLocked(lock);
515	>	}
516	>
517	>	/**
518	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
519	>	* will block if there is a waiting writer thread
520	>	*/
521	>	public void testReaderWriterReaderFairFifo() {
522	>	final PublicReentrantReadWriteLock lock =
523	>	new PublicReentrantReadWriteLock(true);
524	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
525	>
526	>	lock.readLock().lock();
527	>	Thread t1 = newStartedThread(new CheckedRunnable() {
528	>	public void realRun() {
529	>	assertEquals(1, lock.getReadLockCount());
530	>	lock.writeLock().lock();
531	>	assertEquals(0, lock.getReadLockCount());
532	>	t1GotLock.set(true);
533	>	lock.writeLock().unlock();
534	>	}});
535	>	waitForQueuedThread(lock, t1);
536	>
537	>	Thread t2 = newStartedThread(new CheckedRunnable() {
538	>	public void realRun() {
539	>	assertEquals(1, lock.getReadLockCount());
540	>	lock.readLock().lock();
541	>	assertEquals(1, lock.getReadLockCount());
542	>	assertTrue(t1GotLock.get());
543	>	lock.readLock().unlock();
544	>	}});
545	>	waitForQueuedThread(lock, t2);
546	>	assertTrue(t1.isAlive());
547	>	assertNotWriteLocked(lock);
548	>	assertEquals(1, lock.getReadLockCount());
549	>	lock.readLock().unlock();
550	>	awaitTermination(t1);
551	>	awaitTermination(t2);
552	>	assertNotWriteLocked(lock);
553	>	}
554	>
555	>	/**
556	>	* Readlocks succeed only after a writing thread unlocks
557	>	*/
558	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
559	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
560	>	public void testReadAfterWriteLock(boolean fair) {
561	>	final PublicReentrantReadWriteLock lock =
562	>	new PublicReentrantReadWriteLock(fair);
563	>	lock.writeLock().lock();
564	>	Thread t1 = newStartedThread(new CheckedRunnable() {
565	>	public void realRun() {
566	>	lock.readLock().lock();
567	>	lock.readLock().unlock();
568	>	}});
569	>	Thread t2 = newStartedThread(new CheckedRunnable() {
570	>	public void realRun() {
571	>	lock.readLock().lock();
572	>	lock.readLock().unlock();
573	>	}});
574	>
575	>	waitForQueuedThread(lock, t1);
576	>	waitForQueuedThread(lock, t2);
577	>	releaseWriteLock(lock);
578	>	awaitTermination(t1);
579	>	awaitTermination(t2);
580	>	}
581	>
582	>	/**
583	>	* Read trylock succeeds if write locked by current thread
584	>	*/
585	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
586	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
587	>	public void testReadHoldingWriteLock(boolean fair) {
588	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
589	>	lock.writeLock().lock();
590	>	assertTrue(lock.readLock().tryLock());
591	>	lock.readLock().unlock();
592	>	lock.writeLock().unlock();
593	>	}
594	>
595	>	/**
596	>	* Read trylock succeeds (barging) even in the presence of waiting
597	>	* readers and/or writers
598	>	*/
599	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
600	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
601	>	public void testReadTryLockBarging(boolean fair) {
602	>	final PublicReentrantReadWriteLock lock =
603	>	new PublicReentrantReadWriteLock(fair);
604	>	lock.readLock().lock();
605	>
606	>	Thread t1 = newStartedThread(new CheckedRunnable() {
607	>	public void realRun() {
608	>	lock.writeLock().lock();
609	>	lock.writeLock().unlock();
610	>	}});
611	>
612	>	waitForQueuedThread(lock, t1);
613	>
614	>	Thread t2 = newStartedThread(new CheckedRunnable() {
615	>	public void realRun() {
616	>	lock.readLock().lock();
617	>	lock.readLock().unlock();
618	>	}});
619	>
620	>	if (fair)
621	>	waitForQueuedThread(lock, t2);
622	>
623	>	Thread t3 = newStartedThread(new CheckedRunnable() {
624	>	public void realRun() {
625	>	lock.readLock().tryLock();
626	>	lock.readLock().unlock();
627	>	}});
628	>
629	>	assertTrue(lock.getReadLockCount() > 0);
630	>	awaitTermination(t3);
631	>	assertTrue(t1.isAlive());
632	>	if (fair) assertTrue(t2.isAlive());
633	>	lock.readLock().unlock();
634	>	awaitTermination(t1);
635	>	awaitTermination(t2);
636	>	}
637	>
638	>	/**
639	>	* Read lock succeeds if write locked by current thread even if
640	>	* other threads are waiting for readlock
641	>	*/
642	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
643	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
644	>	public void testReadHoldingWriteLock2(boolean fair) {
645	>	final PublicReentrantReadWriteLock lock =
646	>	new PublicReentrantReadWriteLock(fair);
647	>	lock.writeLock().lock();
648	>	lock.readLock().lock();
649	>	lock.readLock().unlock();
650	>
651	>	Thread t1 = newStartedThread(new CheckedRunnable() {
652	>	public void realRun() {
653	>	lock.readLock().lock();
654	>	lock.readLock().unlock();
655	>	}});
656	>	Thread t2 = newStartedThread(new CheckedRunnable() {
657	>	public void realRun() {
658	>	lock.readLock().lock();
659	>	lock.readLock().unlock();
660	>	}});
661	>
662	>	waitForQueuedThread(lock, t1);
663	>	waitForQueuedThread(lock, t2);
664	>	assertWriteLockedByMoi(lock);
665	>	lock.readLock().lock();
666	>	lock.readLock().unlock();
667	>	releaseWriteLock(lock);
668	>	awaitTermination(t1);
669	>	awaitTermination(t2);
670	>	}
671	>
672	>	/**
673	>	* Read lock succeeds if write locked by current thread even if
674	>	* other threads are waiting for writelock
675	>	*/
676	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
677	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
678	>	public void testReadHoldingWriteLock3(boolean fair) {
679	>	final PublicReentrantReadWriteLock lock =
680	>	new PublicReentrantReadWriteLock(fair);
681	>	lock.writeLock().lock();
682	>	lock.readLock().lock();
683	>	lock.readLock().unlock();
684	>
685	>	Thread t1 = newStartedThread(new CheckedRunnable() {
686	>	public void realRun() {
687	>	lock.writeLock().lock();
688	>	lock.writeLock().unlock();
689	>	}});
690	>	Thread t2 = newStartedThread(new CheckedRunnable() {
691	>	public void realRun() {
692	>	lock.writeLock().lock();
693	>	lock.writeLock().unlock();
694	>	}});
695	>
696	>	waitForQueuedThread(lock, t1);
697	>	waitForQueuedThread(lock, t2);
698	>	assertWriteLockedByMoi(lock);
699	>	lock.readLock().lock();
700	>	lock.readLock().unlock();
701	>	assertWriteLockedByMoi(lock);
702	>	lock.writeLock().unlock();
703	>	awaitTermination(t1);
704	>	awaitTermination(t2);
705	>	}
706	>
707	>	/**
708	>	* Write lock succeeds if write locked by current thread even if
709	>	* other threads are waiting for writelock
710	>	*/
711	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
712	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
713	>	public void testWriteHoldingWriteLock4(boolean fair) {
714	>	final PublicReentrantReadWriteLock lock =
715	>	new PublicReentrantReadWriteLock(fair);
716	>	lock.writeLock().lock();
717	>	lock.writeLock().lock();
718	>	lock.writeLock().unlock();
719	>
720	>	Thread t1 = newStartedThread(new CheckedRunnable() {
721	>	public void realRun() {
722	>	lock.writeLock().lock();
723	>	lock.writeLock().unlock();
724	>	}});
725	>	Thread t2 = newStartedThread(new CheckedRunnable() {
726	>	public void realRun() {
727	>	lock.writeLock().lock();
728	>	lock.writeLock().unlock();
729	>	}});
730	>
731	>	waitForQueuedThread(lock, t1);
732	>	waitForQueuedThread(lock, t2);
733	>	assertWriteLockedByMoi(lock);
734	>	assertEquals(1, lock.getWriteHoldCount());
735	>	lock.writeLock().lock();
736	>	assertWriteLockedByMoi(lock);
737	>	assertEquals(2, lock.getWriteHoldCount());
738	>	lock.writeLock().unlock();
739	>	assertWriteLockedByMoi(lock);
740	>	assertEquals(1, lock.getWriteHoldCount());
741	>	lock.writeLock().unlock();
742	>	awaitTermination(t1);
743	>	awaitTermination(t2);
744	>	}
745	>
746	>	/**
747	>	* Read tryLock succeeds if readlocked but not writelocked
748	>	*/
749	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
750	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
751	>	public void testTryLockWhenReadLocked(boolean fair) {
752	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
753	>	lock.readLock().lock();
754	>	Thread t = newStartedThread(new CheckedRunnable() {
755	>	public void realRun() {
756	>	assertTrue(lock.readLock().tryLock());
757	>	lock.readLock().unlock();
758	>	}});
759	>
760	>	awaitTermination(t);
761	>	lock.readLock().unlock();
762	>	}
763	>
764	>	/**
765	>	* write tryLock fails when readlocked
766	>	*/
767	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
768	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
769	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
770	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
771	>	lock.readLock().lock();
772	>	Thread t = newStartedThread(new CheckedRunnable() {
773	>	public void realRun() {
774	>	assertFalse(lock.writeLock().tryLock());
775	>	}});
776	>
777	>	awaitTermination(t);
778	>	lock.readLock().unlock();
779	>	}
780	>
781	>	/**
782	>	* write timed tryLock times out if locked
783	>	*/
784	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
785	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
786	>	public void testWriteTryLock_Timeout(boolean fair) {
787	>	final PublicReentrantReadWriteLock lock =
788	>	new PublicReentrantReadWriteLock(fair);
789	>	lock.writeLock().lock();
790	>	Thread t = newStartedThread(new CheckedRunnable() {
791	>	public void realRun() throws InterruptedException {
792	>	long startTime = System.nanoTime();
793	>	long timeoutMillis = 10;
794	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
795	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
796	>	}});
797	>
798	>	awaitTermination(t);
799	>	releaseWriteLock(lock);
800	>	}
801	>
802	>	/**
803	>	* read timed tryLock times out if write-locked
804	>	*/
805	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
806	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
807	>	public void testReadTryLock_Timeout(boolean fair) {
808	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
809	>	lock.writeLock().lock();
810	>	Thread t = newStartedThread(new CheckedRunnable() {
811	>	public void realRun() throws InterruptedException {
812	>	long startTime = System.nanoTime();
813	>	long timeoutMillis = 10;
814	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
815	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
816	>	}});
817	>
818	>	awaitTermination(t);
819	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
820	>	lock.writeLock().unlock();
821	>	}
822	>
823	>	/**
824	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
825	>	*/
826	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
827	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
828	>	public void testWriteLockInterruptibly(boolean fair) {
829	>	final PublicReentrantReadWriteLock lock =
830	>	new PublicReentrantReadWriteLock(fair);
831	>	try {
832		lock.writeLock().lockInterruptibly();
833	<	} catch(Exception e) {
834	<	unexpectedException();
480	<	}
481	<	Thread t = new Thread(new Runnable() {
482	<	public void run() {
483	<	try {
484	<	lock.writeLock().lockInterruptibly();
485	<	threadShouldThrow();
486	<	}
487	<	catch(InterruptedException success) {
488	<	}
489	<	}
490	<	});
491	<	try {
492	<	t.start();
493	<	t.interrupt();
494	<	t.join();
495	<	lock.writeLock().unlock();
496	<	} catch(Exception e){
497	<	unexpectedException();
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 {
851	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
852	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
853	>	public void testReadLockInterruptibly(boolean fair) {
854	>	final PublicReentrantReadWriteLock lock =
855	>	new PublicReentrantReadWriteLock(fair);
856	>	try {
857	>	lock.readLock().lockInterruptibly();
858	>	lock.readLock().unlock();
859		lock.writeLock().lockInterruptibly();
860	<	} catch(Exception e) {
861	<	unexpectedException();
510	<	}
511	<	Thread t = new Thread(new Runnable() {
512	<	public void run() {
513	<	try {
514	<	lock.readLock().lockInterruptibly();
515	<	threadShouldThrow();
516	<	}
517	<	catch(InterruptedException success) {
518	<	}
519	<	}
520	<	});
521	<	try {
522	<	t.start();
523	<	t.interrupt();
524	<	t.join();
525	<	lock.writeLock().unlock();
526	<	} catch(Exception e){
527	<	unexpectedException();
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	<	}
558	<	catch (IllegalMonitorStateException success) {
559	<	}
560	<	catch (Exception ex) {
561	<	unexpectedException();
562	<	}
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) {
578	<	unexpectedException();
939	>	} catch (InterruptedException e) {
940	>	threadUnexpectedException(e);
941		}
942		}
943
582	–
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	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
955	>	long startTime = System.nanoTime();
956	>	long timeoutMillis = 10;
957	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
958	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
959		lock.writeLock().unlock();
960	<	}
594	<	catch (Exception ex) {
595	<	unexpectedException();
596	<	}
960	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
961		}
962
963		/**
964		* awaitUntil without a signal times out
965		*/
966	<	public void testAwaitUntil_Timeout() {
967	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
968	<	final Condition c = lock.writeLock().newCondition();
969	<	try {
966	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
967	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
968	>	public void testAwaitUntil_Timeout(boolean fair) {
969	>	try {
970	>	final ReentrantReadWriteLock lock =
971	>	new ReentrantReadWriteLock(fair);
972	>	final Condition c = lock.writeLock().newCondition();
973		lock.writeLock().lock();
974	+	long startTime = System.nanoTime();
975	+	long timeoutMillis = 10;
976		java.util.Date d = new java.util.Date();
977	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
977	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
978	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
979		lock.writeLock().unlock();
980	<	}
611	<	catch (Exception ex) {
612	<	unexpectedException();
613	<	}
980	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
981		}
982
983		/**
984		* await returns when signalled
985		*/
986	<	public void testAwait() {
987	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
986	>	public void testAwait()      { testAwait(false); }
987	>	public void testAwait_fair() { testAwait(true); }
988	>	public void testAwait(boolean fair) {
989	>	final PublicReentrantReadWriteLock lock =
990	>	new PublicReentrantReadWriteLock(fair);
991		final Condition c = lock.writeLock().newCondition();
992	<	Thread t = new Thread(new Runnable() {
993	<	public void run() {
994	<	try {
995	<	lock.writeLock().lock();
996	<	c.await();
997	<	lock.writeLock().unlock();
998	<	}
999	<	catch(InterruptedException e) {
1000	<	threadUnexpectedException();
1001	<	}
1002	<	}
1003	<	});
992	>	final CountDownLatch locked = new CountDownLatch(1);
993	>	Thread t = newStartedThread(new CheckedRunnable() {
994	>	public void realRun() throws InterruptedException {
995	>	lock.writeLock().lock();
996	>	locked.countDown();
997	>	c.await();
998	>	lock.writeLock().unlock();
999	>	}});
1000	>
1001	>	await(locked);
1002	>	lock.writeLock().lock();
1003	>	assertHasWaiters(lock, c, t);
1004	>	c.signal();
1005	>	assertHasNoWaiters(lock, c);
1006	>	assertTrue(t.isAlive());
1007	>	lock.writeLock().unlock();
1008	>	awaitTermination(t);
1009	>	}
1010
1011	<	try {
1012	<	t.start();
1013	<	Thread.sleep(SHORT_DELAY_MS);
1014	<	lock.writeLock().lock();
1015	<	c.signal();
1016	<	lock.writeLock().unlock();
1017	<	t.join(SHORT_DELAY_MS);
1018	<	assertFalse(t.isAlive());
1019	<	}
1020	<	catch (Exception ex) {
1021	<	unexpectedException();
1022	<	}
1011	>	/**
1012	>	* awaitUninterruptibly is uninterruptible
1013	>	*/
1014	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1015	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1016	>	public void testAwaitUninterruptibly(boolean fair) {
1017	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1018	>	final Condition c = lock.writeLock().newCondition();
1019	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1020	>
1021	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1022	>	public void realRun() {
1023	>	// Interrupt before awaitUninterruptibly
1024	>	lock.writeLock().lock();
1025	>	pleaseInterrupt.countDown();
1026	>	Thread.currentThread().interrupt();
1027	>	c.awaitUninterruptibly();
1028	>	assertTrue(Thread.interrupted());
1029	>	lock.writeLock().unlock();
1030	>	}});
1031	>
1032	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1033	>	public void realRun() {
1034	>	// Interrupt during awaitUninterruptibly
1035	>	lock.writeLock().lock();
1036	>	pleaseInterrupt.countDown();
1037	>	c.awaitUninterruptibly();
1038	>	assertTrue(Thread.interrupted());
1039	>	lock.writeLock().unlock();
1040	>	}});
1041	>
1042	>	await(pleaseInterrupt);
1043	>	lock.writeLock().lock();
1044	>	lock.writeLock().unlock();
1045	>	t2.interrupt();
1046	>
1047	>	assertThreadStaysAlive(t1);
1048	>	assertTrue(t2.isAlive());
1049	>
1050	>	lock.writeLock().lock();
1051	>	c.signalAll();
1052	>	lock.writeLock().unlock();
1053	>
1054	>	awaitTermination(t1);
1055	>	awaitTermination(t2);
1056		}
1057
1058		/**
1059	<	* awaitUninterruptibly doesn't abort on interrupt
1060	<	*/
1061	<	public void testAwaitUninterruptibly() {
1062	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1059	>	* await/awaitNanos/awaitUntil is interruptible
1060	>	*/
1061	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1062	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1063	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1064	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1065	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1066	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1067	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1068	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1069	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1070	>	final PublicReentrantReadWriteLock lock =
1071	>	new PublicReentrantReadWriteLock(fair);
1072		final Condition c = lock.writeLock().newCondition();
1073	<	Thread t = new Thread(new Runnable() {
1074	<	public void run() {
1075	<	lock.writeLock().lock();
1076	<	c.awaitUninterruptibly();
1073	>	final CountDownLatch locked = new CountDownLatch(1);
1074	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1075	>	public void realRun() throws InterruptedException {
1076	>	lock.writeLock().lock();
1077	>	assertWriteLockedByMoi(lock);
1078	>	assertHasNoWaiters(lock, c);
1079	>	locked.countDown();
1080	>	try {
1081	>	await(c, awaitMethod);
1082	>	} finally {
1083	>	assertWriteLockedByMoi(lock);
1084	>	assertHasNoWaiters(lock, c);
1085		lock.writeLock().unlock();
1086	<	}
1087	<	});
1086	>	assertFalse(Thread.interrupted());
1087	>	}
1088	>	}});
1089	>
1090	>	await(locked);
1091	>	assertHasWaiters(lock, c, t);
1092	>	t.interrupt();
1093	>	awaitTermination(t);
1094	>	assertNotWriteLocked(lock);
1095	>	}
1096	>
1097	>	/**
1098	>	* signalAll wakes up all threads
1099	>	*/
1100	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1101	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1102	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1103	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1104	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1105	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1106	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1107	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1108	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1109	>	final PublicReentrantReadWriteLock lock =
1110	>	new PublicReentrantReadWriteLock(fair);
1111	>	final Condition c = lock.writeLock().newCondition();
1112	>	final CountDownLatch locked = new CountDownLatch(2);
1113	>	final Lock writeLock = lock.writeLock();
1114	>	class Awaiter extends CheckedRunnable {
1115	>	public void realRun() throws InterruptedException {
1116	>	writeLock.lock();
1117	>	locked.countDown();
1118	>	await(c, awaitMethod);
1119	>	writeLock.unlock();
1120	>	}
1121	>	}
1122	>
1123	>	Thread t1 = newStartedThread(new Awaiter());
1124	>	Thread t2 = newStartedThread(new Awaiter());
1125	>
1126	>	await(locked);
1127	>	writeLock.lock();
1128	>	assertHasWaiters(lock, c, t1, t2);
1129	>	c.signalAll();
1130	>	assertHasNoWaiters(lock, c);
1131	>	writeLock.unlock();
1132	>	awaitTermination(t1);
1133	>	awaitTermination(t2);
1134	>	}
1135	>
1136	>	/**
1137	>	* signal wakes up waiting threads in FIFO order
1138	>	*/
1139	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1140	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1141	>	public void testSignalWakesFifo(boolean fair) {
1142	>	final PublicReentrantReadWriteLock lock =
1143	>	new PublicReentrantReadWriteLock(fair);
1144	>	final Condition c = lock.writeLock().newCondition();
1145	>	final CountDownLatch locked1 = new CountDownLatch(1);
1146	>	final CountDownLatch locked2 = new CountDownLatch(1);
1147	>	final Lock writeLock = lock.writeLock();
1148	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1149	>	public void realRun() throws InterruptedException {
1150	>	writeLock.lock();
1151	>	locked1.countDown();
1152	>	c.await();
1153	>	writeLock.unlock();
1154	>	}});
1155	>
1156	>	await(locked1);
1157	>
1158	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1159	>	public void realRun() throws InterruptedException {
1160	>	writeLock.lock();
1161	>	locked2.countDown();
1162	>	c.await();
1163	>	writeLock.unlock();
1164	>	}});
1165	>
1166	>	await(locked2);
1167	>
1168	>	writeLock.lock();
1169	>	assertHasWaiters(lock, c, t1, t2);
1170	>	assertFalse(lock.hasQueuedThreads());
1171	>	c.signal();
1172	>	assertHasWaiters(lock, c, t2);
1173	>	assertTrue(lock.hasQueuedThread(t1));
1174	>	assertFalse(lock.hasQueuedThread(t2));
1175	>	c.signal();
1176	>	assertHasNoWaiters(lock, c);
1177	>	assertTrue(lock.hasQueuedThread(t1));
1178	>	assertTrue(lock.hasQueuedThread(t2));
1179	>	writeLock.unlock();
1180	>	awaitTermination(t1);
1181	>	awaitTermination(t2);
1182	>	}
1183	>
1184	>	/**
1185	>	* await after multiple reentrant locking preserves lock count
1186	>	*/
1187	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1188	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1189	>	public void testAwaitLockCount(boolean fair) {
1190	>	final PublicReentrantReadWriteLock lock =
1191	>	new PublicReentrantReadWriteLock(fair);
1192	>	final Condition c = lock.writeLock().newCondition();
1193	>	final CountDownLatch locked = new CountDownLatch(2);
1194	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1195	>	public void realRun() throws InterruptedException {
1196	>	lock.writeLock().lock();
1197	>	assertWriteLockedByMoi(lock);
1198	>	assertEquals(1, lock.writeLock().getHoldCount());
1199	>	locked.countDown();
1200	>	c.await();
1201	>	assertWriteLockedByMoi(lock);
1202	>	assertEquals(1, lock.writeLock().getHoldCount());
1203	>	lock.writeLock().unlock();
1204	>	}});
1205	>
1206	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1207	>	public void realRun() throws InterruptedException {
1208	>	lock.writeLock().lock();
1209	>	lock.writeLock().lock();
1210	>	assertWriteLockedByMoi(lock);
1211	>	assertEquals(2, lock.writeLock().getHoldCount());
1212	>	locked.countDown();
1213	>	c.await();
1214	>	assertWriteLockedByMoi(lock);
1215	>	assertEquals(2, lock.writeLock().getHoldCount());
1216	>	lock.writeLock().unlock();
1217	>	lock.writeLock().unlock();
1218	>	}});
1219	>
1220	>	await(locked);
1221	>	lock.writeLock().lock();
1222	>	assertHasWaiters(lock, c, t1, t2);
1223	>	c.signalAll();
1224	>	assertHasNoWaiters(lock, c);
1225	>	lock.writeLock().unlock();
1226	>	awaitTermination(t1);
1227	>	awaitTermination(t2);
1228	>	}
1229	>
1230	>	/**
1231	>	* A serialized lock deserializes as unlocked
1232	>	*/
1233	>	public void testSerialization()      { testSerialization(false); }
1234	>	public void testSerialization_fair() { testSerialization(true); }
1235	>	public void testSerialization(boolean fair) {
1236	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1237	>	lock.writeLock().lock();
1238	>	lock.readLock().lock();
1239	>
1240	>	ReentrantReadWriteLock clone = serialClone(lock);
1241	>	assertEquals(lock.isFair(), clone.isFair());
1242	>	assertTrue(lock.isWriteLocked());
1243	>	assertFalse(clone.isWriteLocked());
1244	>	assertEquals(1, lock.getReadLockCount());
1245	>	assertEquals(0, clone.getReadLockCount());
1246	>	clone.writeLock().lock();
1247	>	clone.readLock().lock();
1248	>	assertTrue(clone.isWriteLocked());
1249	>	assertEquals(1, clone.getReadLockCount());
1250	>	clone.readLock().unlock();
1251	>	clone.writeLock().unlock();
1252	>	assertFalse(clone.isWriteLocked());
1253	>	assertEquals(1, lock.getReadLockCount());
1254	>	assertEquals(0, clone.getReadLockCount());
1255	>	}
1256	>
1257	>	/**
1258	>	* hasQueuedThreads reports whether there are waiting threads
1259	>	*/
1260	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1261	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1262	>	public void testHasQueuedThreads(boolean fair) {
1263	>	final PublicReentrantReadWriteLock lock =
1264	>	new PublicReentrantReadWriteLock(fair);
1265	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1266	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1267	>	assertFalse(lock.hasQueuedThreads());
1268	>	lock.writeLock().lock();
1269	>	assertFalse(lock.hasQueuedThreads());
1270	>	t1.start();
1271	>	waitForQueuedThread(lock, t1);
1272	>	assertTrue(lock.hasQueuedThreads());
1273	>	t2.start();
1274	>	waitForQueuedThread(lock, t2);
1275	>	assertTrue(lock.hasQueuedThreads());
1276	>	t1.interrupt();
1277	>	awaitTermination(t1);
1278	>	assertTrue(lock.hasQueuedThreads());
1279	>	lock.writeLock().unlock();
1280	>	awaitTermination(t2);
1281	>	assertFalse(lock.hasQueuedThreads());
1282	>	}
1283
1284	+	/**
1285	+	* hasQueuedThread(null) throws NPE
1286	+	*/
1287	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1288	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1289	+	public void testHasQueuedThreadNPE(boolean fair) {
1290	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1291		try {
1292	<	t.start();
1293	<	Thread.sleep(SHORT_DELAY_MS);
1294	<	t.interrupt();
667	<	lock.writeLock().lock();
668	<	c.signal();
669	<	lock.writeLock().unlock();
670	<	assert(t.isInterrupted());
671	<	t.join(SHORT_DELAY_MS);
672	<	assertFalse(t.isAlive());
673	<	}
674	<	catch (Exception ex) {
675	<	unexpectedException();
676	<	}
1292	>	lock.hasQueuedThread(null);
1293	>	shouldThrow();
1294	>	} catch (NullPointerException success) {}
1295		}
1296
1297		/**
1298	<	* await is interruptible
1298	>	* hasQueuedThread reports whether a thread is queued
1299		*/
1300	<	public void testAwait_Interrupt() {
1301	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1302	<	final Condition c = lock.writeLock().newCondition();
1303	<	Thread t = new Thread(new Runnable() {
1304	<	public void run() {
1305	<	try {
1306	<	lock.writeLock().lock();
1307	<	c.await();
1308	<	lock.writeLock().unlock();
1309	<	threadShouldThrow();
1310	<	}
1311	<	catch(InterruptedException success) {
1312	<	}
1313	<	}
1314	<	});
1300	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1301	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1302	>	public void testHasQueuedThread(boolean fair) {
1303	>	final PublicReentrantReadWriteLock lock =
1304	>	new PublicReentrantReadWriteLock(fair);
1305	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1306	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1307	>	assertFalse(lock.hasQueuedThread(t1));
1308	>	assertFalse(lock.hasQueuedThread(t2));
1309	>	lock.writeLock().lock();
1310	>	t1.start();
1311	>	waitForQueuedThread(lock, t1);
1312	>	assertTrue(lock.hasQueuedThread(t1));
1313	>	assertFalse(lock.hasQueuedThread(t2));
1314	>	t2.start();
1315	>	waitForQueuedThread(lock, t2);
1316	>	assertTrue(lock.hasQueuedThread(t1));
1317	>	assertTrue(lock.hasQueuedThread(t2));
1318	>	t1.interrupt();
1319	>	awaitTermination(t1);
1320	>	assertFalse(lock.hasQueuedThread(t1));
1321	>	assertTrue(lock.hasQueuedThread(t2));
1322	>	lock.writeLock().unlock();
1323	>	awaitTermination(t2);
1324	>	assertFalse(lock.hasQueuedThread(t1));
1325	>	assertFalse(lock.hasQueuedThread(t2));
1326	>	}
1327	>
1328	>	/**
1329	>	* getQueueLength reports number of waiting threads
1330	>	*/
1331	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1332	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1333	>	public void testGetQueueLength(boolean fair) {
1334	>	final PublicReentrantReadWriteLock lock =
1335	>	new PublicReentrantReadWriteLock(fair);
1336	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1337	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1338	>	assertEquals(0, lock.getQueueLength());
1339	>	lock.writeLock().lock();
1340	>	t1.start();
1341	>	waitForQueuedThread(lock, t1);
1342	>	assertEquals(1, lock.getQueueLength());
1343	>	t2.start();
1344	>	waitForQueuedThread(lock, t2);
1345	>	assertEquals(2, lock.getQueueLength());
1346	>	t1.interrupt();
1347	>	awaitTermination(t1);
1348	>	assertEquals(1, lock.getQueueLength());
1349	>	lock.writeLock().unlock();
1350	>	awaitTermination(t2);
1351	>	assertEquals(0, lock.getQueueLength());
1352	>	}
1353	>
1354	>	/**
1355	>	* getQueuedThreads includes waiting threads
1356	>	*/
1357	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1358	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1359	>	public void testGetQueuedThreads(boolean fair) {
1360	>	final PublicReentrantReadWriteLock lock =
1361	>	new PublicReentrantReadWriteLock(fair);
1362	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1363	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1364	>	assertTrue(lock.getQueuedThreads().isEmpty());
1365	>	lock.writeLock().lock();
1366	>	assertTrue(lock.getQueuedThreads().isEmpty());
1367	>	t1.start();
1368	>	waitForQueuedThread(lock, t1);
1369	>	assertEquals(1, lock.getQueuedThreads().size());
1370	>	assertTrue(lock.getQueuedThreads().contains(t1));
1371	>	t2.start();
1372	>	waitForQueuedThread(lock, t2);
1373	>	assertEquals(2, lock.getQueuedThreads().size());
1374	>	assertTrue(lock.getQueuedThreads().contains(t1));
1375	>	assertTrue(lock.getQueuedThreads().contains(t2));
1376	>	t1.interrupt();
1377	>	awaitTermination(t1);
1378	>	assertFalse(lock.getQueuedThreads().contains(t1));
1379	>	assertTrue(lock.getQueuedThreads().contains(t2));
1380	>	assertEquals(1, lock.getQueuedThreads().size());
1381	>	lock.writeLock().unlock();
1382	>	awaitTermination(t2);
1383	>	assertTrue(lock.getQueuedThreads().isEmpty());
1384	>	}
1385
1386	+	/**
1387	+	* hasWaiters throws NPE if null
1388	+	*/
1389	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1390	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1391	+	public void testHasWaitersNPE(boolean fair) {
1392	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1393		try {
1394	<	t.start();
1395	<	Thread.sleep(SHORT_DELAY_MS);
1396	<	t.interrupt();
702	<	t.join(SHORT_DELAY_MS);
703	<	assertFalse(t.isAlive());
704	<	}
705	<	catch (Exception ex) {
706	<	unexpectedException();
707	<	}
1394	>	lock.hasWaiters(null);
1395	>	shouldThrow();
1396	>	} catch (NullPointerException success) {}
1397		}
1398
1399		/**
1400	<	* awaitNanos is interruptible
1400	>	* getWaitQueueLength throws NPE if null
1401		*/
1402	<	public void testAwaitNanos_Interrupt() {
1403	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1404	<	final Condition c = lock.writeLock().newCondition();
1405	<	Thread t = new Thread(new Runnable() {
1406	<	public void run() {
1407	<	try {
1408	<	lock.writeLock().lock();
1409	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1410	<	lock.writeLock().unlock();
722	<	threadShouldThrow();
723	<	}
724	<	catch(InterruptedException success) {
725	<	}
726	<	}
727	<	});
1402	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1403	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1404	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1405	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1406	>	try {
1407	>	lock.getWaitQueueLength(null);
1408	>	shouldThrow();
1409	>	} catch (NullPointerException success) {}
1410	>	}
1411
1412	+	/**
1413	+	* getWaitingThreads throws NPE if null
1414	+	*/
1415	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1416	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1417	+	public void testGetWaitingThreadsNPE(boolean fair) {
1418	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1419		try {
1420	<	t.start();
1421	<	Thread.sleep(SHORT_DELAY_MS);
1422	<	t.interrupt();
733	<	t.join(SHORT_DELAY_MS);
734	<	assertFalse(t.isAlive());
735	<	}
736	<	catch (Exception ex) {
737	<	unexpectedException();
738	<	}
1420	>	lock.getWaitingThreads(null);
1421	>	shouldThrow();
1422	>	} catch (NullPointerException success) {}
1423		}
1424
1425		/**
1426	<	* awaitUntil is interruptible
1426	>	* hasWaiters throws IllegalArgumentException if not owned
1427		*/
1428	<	public void testAwaitUntil_Interrupt() {
1429	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1428	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1429	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1430	>	public void testHasWaitersIAE(boolean fair) {
1431	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1432		final Condition c = lock.writeLock().newCondition();
1433	<	Thread t = new Thread(new Runnable() {
1434	<	public void run() {
1435	<	try {
1436	<	lock.writeLock().lock();
1437	<	java.util.Date d = new java.util.Date();
1438	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
753	<	lock.writeLock().unlock();
754	<	threadShouldThrow();
755	<	}
756	<	catch(InterruptedException success) {
757	<	}
758	<	}
759	<	});
1433	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1434	>	try {
1435	>	lock2.hasWaiters(c);
1436	>	shouldThrow();
1437	>	} catch (IllegalArgumentException success) {}
1438	>	}
1439
1440	+	/**
1441	+	* hasWaiters throws IllegalMonitorStateException if not locked
1442	+	*/
1443	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1444	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1445	+	public void testHasWaitersIMSE(boolean fair) {
1446	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1447	+	final Condition c = lock.writeLock().newCondition();
1448		try {
1449	<	t.start();
1450	<	Thread.sleep(SHORT_DELAY_MS);
1451	<	t.interrupt();
765	<	t.join(SHORT_DELAY_MS);
766	<	assertFalse(t.isAlive());
767	<	}
768	<	catch (Exception ex) {
769	<	unexpectedException();
770	<	}
1449	>	lock.hasWaiters(c);
1450	>	shouldThrow();
1451	>	} catch (IllegalMonitorStateException success) {}
1452		}
1453
1454		/**
1455	<	* signalAll wakes up all threads
1455	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1456		*/
1457	<	public void testSignalAll() {
1458	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1457	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1458	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1459	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1460	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1461		final Condition c = lock.writeLock().newCondition();
1462	<	Thread t1 = new Thread(new Runnable() {
1463	<	public void run() {
1464	<	try {
1465	<	lock.writeLock().lock();
1466	<	c.await();
784	<	lock.writeLock().unlock();
785	<	}
786	<	catch(InterruptedException e) {
787	<	threadUnexpectedException();
788	<	}
789	<	}
790	<	});
791	<
792	<	Thread t2 = new Thread(new Runnable() {
793	<	public void run() {
794	<	try {
795	<	lock.writeLock().lock();
796	<	c.await();
797	<	lock.writeLock().unlock();
798	<	}
799	<	catch(InterruptedException e) {
800	<	threadUnexpectedException();
801	<	}
802	<	}
803	<	});
804	<
805	<	try {
806	<	t1.start();
807	<	t2.start();
808	<	Thread.sleep(SHORT_DELAY_MS);
809	<	lock.writeLock().lock();
810	<	c.signalAll();
811	<	lock.writeLock().unlock();
812	<	t1.join(SHORT_DELAY_MS);
813	<	t2.join(SHORT_DELAY_MS);
814	<	assertFalse(t1.isAlive());
815	<	assertFalse(t2.isAlive());
816	<	}
817	<	catch (Exception ex) {
818	<	unexpectedException();
819	<	}
1462	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1463	>	try {
1464	>	lock2.getWaitQueueLength(c);
1465	>	shouldThrow();
1466	>	} catch (IllegalArgumentException success) {}
1467		}
1468
1469		/**
1470	<	* A serialized lock deserializes as unlocked
1470	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1471		*/
1472	<	public void testSerialization() {
1473	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1474	<	l.readLock().lock();
1475	<	l.readLock().unlock();
1476	<
1477	<	try {
1478	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1479	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1480	<	out.writeObject(l);
834	<	out.close();
835	<
836	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
837	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
838	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
839	<	r.readLock().lock();
840	<	r.readLock().unlock();
841	<	} catch(Exception e){
842	<	e.printStackTrace();
843	<	unexpectedException();
844	<	}
1472	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1473	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1474	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1475	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1476	>	final Condition c = lock.writeLock().newCondition();
1477	>	try {
1478	>	lock.getWaitQueueLength(c);
1479	>	shouldThrow();
1480	>	} catch (IllegalMonitorStateException success) {}
1481		}
1482
1483		/**
1484	<	* getQueueLength reports number of waiting threads
1484	>	* getWaitingThreads throws IllegalArgumentException if not owned
1485		*/
1486	<	public void testGetQueueLength() {
1487	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1488	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1489	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1486	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1487	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1488	>	public void testGetWaitingThreadsIAE(boolean fair) {
1489	>	final PublicReentrantReadWriteLock lock =
1490	>	new PublicReentrantReadWriteLock(fair);
1491	>	final Condition c = lock.writeLock().newCondition();
1492	>	final PublicReentrantReadWriteLock lock2 =
1493	>	new PublicReentrantReadWriteLock(fair);
1494		try {
1495	<	assertEquals(0, lock.getQueueLength());
1496	<	lock.writeLock().lock();
1497	<	t1.start();
1498	<	Thread.sleep(SHORT_DELAY_MS);
859	<	assertEquals(1, lock.getQueueLength());
860	<	t2.start();
861	<	Thread.sleep(SHORT_DELAY_MS);
862	<	assertEquals(2, lock.getQueueLength());
863	<	t1.interrupt();
864	<	Thread.sleep(SHORT_DELAY_MS);
865	<	assertEquals(1, lock.getQueueLength());
866	<	lock.writeLock().unlock();
867	<	Thread.sleep(SHORT_DELAY_MS);
868	<	assertEquals(0, lock.getQueueLength());
869	<	t1.join();
870	<	t2.join();
871	<	} catch(Exception e){
872	<	unexpectedException();
873	<	}
874	<	}
1495	>	lock2.getWaitingThreads(c);
1496	>	shouldThrow();
1497	>	} catch (IllegalArgumentException success) {}
1498	>	}
1499
1500		/**
1501	<	* getQueuedThreads includes waiting threads
1501	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1502		*/
1503	<	public void testGetQueuedThreads() {
1504	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1505	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1506	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1503	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1504	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1505	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1506	>	final PublicReentrantReadWriteLock lock =
1507	>	new PublicReentrantReadWriteLock(fair);
1508	>	final Condition c = lock.writeLock().newCondition();
1509		try {
1510	<	assertTrue(lock.getQueuedThreads().isEmpty());
1511	<	lock.writeLock().lock();
1512	<	assertTrue(lock.getQueuedThreads().isEmpty());
1513	<	t1.start();
888	<	Thread.sleep(SHORT_DELAY_MS);
889	<	assertTrue(lock.getQueuedThreads().contains(t1));
890	<	t2.start();
891	<	Thread.sleep(SHORT_DELAY_MS);
892	<	assertTrue(lock.getQueuedThreads().contains(t1));
893	<	assertTrue(lock.getQueuedThreads().contains(t2));
894	<	t1.interrupt();
895	<	Thread.sleep(SHORT_DELAY_MS);
896	<	assertFalse(lock.getQueuedThreads().contains(t1));
897	<	assertTrue(lock.getQueuedThreads().contains(t2));
898	<	lock.writeLock().unlock();
899	<	Thread.sleep(SHORT_DELAY_MS);
900	<	assertTrue(lock.getQueuedThreads().isEmpty());
901	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1510	>	lock.getWaitingThreads(c);
1511	>	shouldThrow();
1512	>	} catch (IllegalMonitorStateException success) {}
1513	>	}
1514
1515		/**
1516		* hasWaiters returns true when a thread is waiting, else false
1517		*/
1518	<	public void testHasWaiters() {
1519	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1520	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1521	<	Thread t = new Thread(new Runnable() {
1522	<	public void run() {
1523	<	try {
1524	<	lock.writeLock().lock();
1525	<	threadAssertFalse(c.hasWaiters());
1526	<	threadAssertEquals(0, c.getWaitQueueLength());
1527	<	c.await();
1528	<	lock.writeLock().unlock();
1529	<	}
1530	<	catch(InterruptedException e) {
1531	<	threadUnexpectedException();
1532	<	}
1533	<	}
1534	<	});
1535	<
1536	<	try {
1537	<	t.start();
1538	<	Thread.sleep(SHORT_DELAY_MS);
1539	<	lock.writeLock().lock();
1540	<	assertTrue(c.hasWaiters());
1541	<	assertEquals(1, c.getWaitQueueLength());
1542	<	c.signal();
1543	<	lock.writeLock().unlock();
1544	<	Thread.sleep(SHORT_DELAY_MS);
1545	<	lock.writeLock().lock();
1546	<	assertFalse(c.hasWaiters());
940	<	assertEquals(0, c.getWaitQueueLength());
941	<	lock.writeLock().unlock();
942	<	t.join(SHORT_DELAY_MS);
943	<	assertFalse(t.isAlive());
944	<	}
945	<	catch (Exception ex) {
946	<	unexpectedException();
947	<	}
1518	>	public void testHasWaiters()      { testHasWaiters(false); }
1519	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1520	>	public void testHasWaiters(boolean fair) {
1521	>	final PublicReentrantReadWriteLock lock =
1522	>	new PublicReentrantReadWriteLock(fair);
1523	>	final Condition c = lock.writeLock().newCondition();
1524	>	final CountDownLatch locked = new CountDownLatch(1);
1525	>	Thread t = newStartedThread(new CheckedRunnable() {
1526	>	public void realRun() throws InterruptedException {
1527	>	lock.writeLock().lock();
1528	>	assertHasNoWaiters(lock, c);
1529	>	assertFalse(lock.hasWaiters(c));
1530	>	locked.countDown();
1531	>	c.await();
1532	>	assertHasNoWaiters(lock, c);
1533	>	assertFalse(lock.hasWaiters(c));
1534	>	lock.writeLock().unlock();
1535	>	}});
1536	>
1537	>	await(locked);
1538	>	lock.writeLock().lock();
1539	>	assertHasWaiters(lock, c, t);
1540	>	assertTrue(lock.hasWaiters(c));
1541	>	c.signal();
1542	>	assertHasNoWaiters(lock, c);
1543	>	assertFalse(lock.hasWaiters(c));
1544	>	lock.writeLock().unlock();
1545	>	awaitTermination(t);
1546	>	assertHasNoWaiters(lock, c);
1547		}
1548
1549		/**
1550		* getWaitQueueLength returns number of waiting threads
1551		*/
1552	<	public void testGetWaitQueueLength() {
1553	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1554	<	final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition());
1555	<	Thread t1 = new Thread(new Runnable() {
1556	<	public void run() {
1557	<	try {
1558	<	lock.writeLock().lock();
1559	<	threadAssertFalse(c.hasWaiters());
1560	<	threadAssertEquals(0, c.getWaitQueueLength());
1561	<	c.await();
1562	<	lock.writeLock().unlock();
1563	<	}
1564	<	catch(InterruptedException e) {
1565	<	threadUnexpectedException();
1566	<	}
1567	<	}
1568	<	});
1569	<
1570	<	Thread t2 = new Thread(new Runnable() {
1571	<	public void run() {
1572	<	try {
1573	<	lock.writeLock().lock();
1574	<	threadAssertTrue(c.hasWaiters());
1575	<	threadAssertEquals(1, c.getWaitQueueLength());
1576	<	c.await();
1577	<	lock.writeLock().unlock();
1578	<	}
1579	<	catch(InterruptedException e) {
1580	<	threadUnexpectedException();
1581	<	}
1582	<	}
1583	<	});
1584	<
1585	<	try {
1586	<	t1.start();
1587	<	Thread.sleep(SHORT_DELAY_MS);
1588	<	t2.start();
1589	<	Thread.sleep(SHORT_DELAY_MS);
1590	<	lock.writeLock().lock();
1591	<	assertTrue(c.hasWaiters());
1592	<	assertEquals(2, c.getWaitQueueLength());
1593	<	c.signalAll();
1594	<	lock.writeLock().unlock();
1595	<	Thread.sleep(SHORT_DELAY_MS);
1596	<	lock.writeLock().lock();
1597	<	assertFalse(c.hasWaiters());
1598	<	assertEquals(0, c.getWaitQueueLength());
1599	<	lock.writeLock().unlock();
1600	<	t1.join(SHORT_DELAY_MS);
1601	<	t2.join(SHORT_DELAY_MS);
1602	<	assertFalse(t1.isAlive());
1603	<	assertFalse(t2.isAlive());
1604	<	}
1605	<	catch (Exception ex) {
1606	<	unexpectedException();
1607	<	}
1552	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1553	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1554	>	public void testGetWaitQueueLength(boolean fair) {
1555	>	final PublicReentrantReadWriteLock lock =
1556	>	new PublicReentrantReadWriteLock(fair);
1557	>	final Condition c = lock.writeLock().newCondition();
1558	>	final CountDownLatch locked = new CountDownLatch(1);
1559	>	Thread t = newStartedThread(new CheckedRunnable() {
1560	>	public void realRun() throws InterruptedException {
1561	>	lock.writeLock().lock();
1562	>	assertEquals(0, lock.getWaitQueueLength(c));
1563	>	locked.countDown();
1564	>	c.await();
1565	>	lock.writeLock().unlock();
1566	>	}});
1567	>
1568	>	await(locked);
1569	>	lock.writeLock().lock();
1570	>	assertHasWaiters(lock, c, t);
1571	>	assertEquals(1, lock.getWaitQueueLength(c));
1572	>	c.signal();
1573	>	assertHasNoWaiters(lock, c);
1574	>	assertEquals(0, lock.getWaitQueueLength(c));
1575	>	lock.writeLock().unlock();
1576	>	awaitTermination(t);
1577	>	}
1578	>
1579	>	/**
1580	>	* getWaitingThreads returns only and all waiting threads
1581	>	*/
1582	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1583	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1584	>	public void testGetWaitingThreads(boolean fair) {
1585	>	final PublicReentrantReadWriteLock lock =
1586	>	new PublicReentrantReadWriteLock(fair);
1587	>	final Condition c = lock.writeLock().newCondition();
1588	>	final CountDownLatch locked1 = new CountDownLatch(1);
1589	>	final CountDownLatch locked2 = new CountDownLatch(1);
1590	>	Thread t1 = new Thread(new CheckedRunnable() {
1591	>	public void realRun() throws InterruptedException {
1592	>	lock.writeLock().lock();
1593	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1594	>	locked1.countDown();
1595	>	c.await();
1596	>	lock.writeLock().unlock();
1597	>	}});
1598	>
1599	>	Thread t2 = new Thread(new CheckedRunnable() {
1600	>	public void realRun() throws InterruptedException {
1601	>	lock.writeLock().lock();
1602	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1603	>	locked2.countDown();
1604	>	c.await();
1605	>	lock.writeLock().unlock();
1606	>	}});
1607	>
1608	>	lock.writeLock().lock();
1609	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1610	>	lock.writeLock().unlock();
1611	>
1612	>	t1.start();
1613	>	await(locked1);
1614	>	t2.start();
1615	>	await(locked2);
1616	>
1617	>	lock.writeLock().lock();
1618	>	assertTrue(lock.hasWaiters(c));
1619	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1620	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1621	>	assertEquals(2, lock.getWaitingThreads(c).size());
1622	>	c.signalAll();
1623	>	assertHasNoWaiters(lock, c);
1624	>	lock.writeLock().unlock();
1625	>
1626	>	awaitTermination(t1);
1627	>	awaitTermination(t2);
1628	>
1629	>	assertHasNoWaiters(lock, c);
1630	>	}
1631	>
1632	>	/**
1633	>	* toString indicates current lock state
1634	>	*/
1635	>	public void testToString()      { testToString(false); }
1636	>	public void testToString_fair() { testToString(true); }
1637	>	public void testToString(boolean fair) {
1638	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1639	>	assertTrue(lock.toString().contains("Write locks = 0"));
1640	>	assertTrue(lock.toString().contains("Read locks = 0"));
1641	>	lock.writeLock().lock();
1642	>	assertTrue(lock.toString().contains("Write locks = 1"));
1643	>	assertTrue(lock.toString().contains("Read locks = 0"));
1644	>	lock.writeLock().unlock();
1645	>	lock.readLock().lock();
1646	>	lock.readLock().lock();
1647	>	assertTrue(lock.toString().contains("Write locks = 0"));
1648	>	assertTrue(lock.toString().contains("Read locks = 2"));
1649	>	}
1650	>
1651	>	/**
1652	>	* readLock.toString indicates current lock state
1653	>	*/
1654	>	public void testReadLockToString()      { testReadLockToString(false); }
1655	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1656	>	public void testReadLockToString(boolean fair) {
1657	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1658	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1659	>	lock.readLock().lock();
1660	>	lock.readLock().lock();
1661	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1662	>	}
1663	>
1664	>	/**
1665	>	* writeLock.toString indicates current lock state
1666	>	*/
1667	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1668	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1669	>	public void testWriteLockToString(boolean fair) {
1670	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1671	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672	>	lock.writeLock().lock();
1673	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1674	>	lock.writeLock().unlock();
1675	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1676		}
1677	+
1678		}

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