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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.9 by dl, Mon Dec 22 00:48:56 2003 UTC vs.
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.util.concurrent.atomic.AtomicBoolean;
11		import java.util.concurrent.locks.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.io.*;
15		import java.util.*;
16
17		public class ReentrantReadWriteLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantReadWriteLockTest.class);
22	>	return new TestSuite(ReentrantReadWriteLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantReadWriteLock lock;
30		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
31	<	public void run() {
32	<	try {
30	<	lock.writeLock().lockInterruptibly();
31	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
35	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantReadWriteLock lock;
42		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	<	public void run() {
44	<	try {
45	<	lock.writeLock().lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 53 | Line 50 | public class ReentrantReadWriteLockTest
50		*/
51		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52		PublicReentrantReadWriteLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56		}
57	<	public PublicCondition newCondition() {
58	<	return new PublicCondition(this);
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59		}
60	<
61	<	static class PublicCondition extends ReentrantReadWriteLock.WriterConditionObject {
64	<	PublicCondition(PublicReentrantReadWriteLock l) { super(l); }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62		}
69	–
63		}
64
65		/**
66	<	* Constructor sets given fairness, and is in unlocked state
66	>	* Releases write lock, checking that it had a hold count of 1.
67		*/
68	<	public void testConstructor() {
69	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
70	<	assertFalse(rl.isFair());
71	<	assertFalse(rl.isWriteLocked());
72	<	assertEquals(0, rl.getReadLockCount());
73	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
81	<	assertTrue(r2.isFair());
82	<	assertFalse(r2.isWriteLocked());
83	<	assertEquals(0, r2.getReadLockCount());
68	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
69	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
70	>	assertWriteLockedBy(lock, Thread.currentThread());
71	>	assertEquals(1, lock.getWriteHoldCount());
72	>	writeLock.unlock();
73	>	assertNotWriteLocked(lock);
74		}
75
76		/**
77	<	* write-locking and read-locking an unlocked lock succeed
77	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78		*/
79	<	public void testLock() {
80	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
81	<	rl.writeLock().lock();
82	<	assertTrue(rl.isWriteLocked());
83	<	assertTrue(rl.isWriteLockedByCurrentThread());
84	<	assertEquals(0, rl.getReadLockCount());
85	<	rl.writeLock().unlock();
86	<	assertFalse(rl.isWriteLocked());
87	<	assertFalse(rl.isWriteLockedByCurrentThread());
98	<	assertEquals(0, rl.getReadLockCount());
99	<	rl.readLock().lock();
100	<	assertFalse(rl.isWriteLocked());
101	<	assertFalse(rl.isWriteLockedByCurrentThread());
102	<	assertEquals(1, rl.getReadLockCount());
103	<	rl.readLock().unlock();
104	<	assertFalse(rl.isWriteLocked());
105	<	assertFalse(rl.isWriteLockedByCurrentThread());
106	<	assertEquals(0, rl.getReadLockCount());
79	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
80	>	long startTime = System.nanoTime();
81	>	while (!lock.hasQueuedThread(t)) {
82	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
83	>	throw new AssertionError("timed out");
84	>	Thread.yield();
85	>	}
86	>	assertTrue(t.isAlive());
87	>	assertTrue(lock.getOwner() != t);
88		}
89
90	+	/**
91	+	* Checks that lock is not write-locked.
92	+	*/
93	+	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
94	+	assertFalse(lock.isWriteLocked());
95	+	assertFalse(lock.isWriteLockedByCurrentThread());
96	+	assertFalse(lock.writeLock().isHeldByCurrentThread());
97	+	assertNull(lock.getOwner());
98	+	assertEquals(0, lock.getWriteHoldCount());
99	+	}
100
101		/**
102	<	* locking an unlocked fair lock succeeds
102	>	* Checks that lock is write-locked by the given thread.
103		*/
104	<	public void testFairLock() {
105	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
106	<	rl.writeLock().lock();
107	<	assertTrue(rl.isWriteLocked());
108	<	assertTrue(rl.isWriteLockedByCurrentThread());
109	<	assertEquals(0, rl.getReadLockCount());
110	<	rl.writeLock().unlock();
111	<	assertFalse(rl.isWriteLocked());
112	<	assertFalse(rl.isWriteLockedByCurrentThread());
113	<	assertEquals(0, rl.getReadLockCount());
123	<	rl.readLock().lock();
124	<	assertFalse(rl.isWriteLocked());
125	<	assertFalse(rl.isWriteLockedByCurrentThread());
126	<	assertEquals(1, rl.getReadLockCount());
127	<	rl.readLock().unlock();
128	<	assertFalse(rl.isWriteLocked());
129	<	assertFalse(rl.isWriteLockedByCurrentThread());
130	<	assertEquals(0, rl.getReadLockCount());
104	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
105	>	assertTrue(lock.isWriteLocked());
106	>	assertSame(t, lock.getOwner());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.isWriteLockedByCurrentThread());
109	>	assertEquals(t == Thread.currentThread(),
110	>	lock.writeLock().isHeldByCurrentThread());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.getWriteHoldCount() > 0);
113	>	assertEquals(0, lock.getReadLockCount());
114		}
115
116		/**
117	<	* getWriteHoldCount returns number of recursive holds
117	>	* Checks that condition c has no waiters.
118		*/
119	<	public void testGetHoldCount() {
120	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
138	<	for(int i = 1; i <= SIZE; i++) {
139	<	lock.writeLock().lock();
140	<	assertEquals(i,lock.getWriteHoldCount());
141	<	}
142	<	for(int i = SIZE; i > 0; i--) {
143	<	lock.writeLock().unlock();
144	<	assertEquals(i-1,lock.getWriteHoldCount());
145	<	}
119	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	>	assertHasWaiters(lock, c, new Thread[] {});
121		}
147	–
122
123		/**
124	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
124	>	* Checks that condition c has exactly the given waiter threads.
125		*/
126	<	public void testUnlock_IllegalMonitorStateException() {
127	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
128	<	try {
129	<	rl.writeLock().unlock();
130	<	shouldThrow();
131	<	} catch(IllegalMonitorStateException success){}
126	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
127	>	Thread... threads) {
128	>	lock.writeLock().lock();
129	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
130	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
131	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
132	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
133	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
134	>	new HashSet<Thread>(Arrays.asList(threads)));
135	>	lock.writeLock().unlock();
136		}
137
138	+	/**
139	+	* Constructor sets given fairness, and is in unlocked state
140	+	*/
141	+	public void testConstructor() {
142	+	PublicReentrantReadWriteLock lock;
143	+
144	+	lock = new PublicReentrantReadWriteLock();
145	+	assertFalse(lock.isFair());
146	+	assertNotWriteLocked(lock);
147	+	assertEquals(0, lock.getReadLockCount());
148	+
149	+	lock = new PublicReentrantReadWriteLock(true);
150	+	assertTrue(lock.isFair());
151	+	assertNotWriteLocked(lock);
152	+	assertEquals(0, lock.getReadLockCount());
153	+
154	+	lock = new PublicReentrantReadWriteLock(false);
155	+	assertFalse(lock.isFair());
156	+	assertNotWriteLocked(lock);
157	+	assertEquals(0, lock.getReadLockCount());
158	+	}
159
160		/**
161	<	* write-lockInterruptibly is interruptible
161	>	* write-locking and read-locking an unlocked lock succeed
162		*/
163	<	public void testWriteLockInterruptibly_Interrupted() {
164	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	<	lock.writeLock().lock();
166	<	Thread t = new Thread(new Runnable() {
167	<	public void run() {
168	<	try {
169	<	lock.writeLock().lockInterruptibly();
170	<	threadShouldThrow();
171	<	} catch(InterruptedException success){}
172	<	}
173	<	});
174	<	try {
175	<	t.start();
176	<	t.interrupt();
177	<	lock.writeLock().unlock();
179	<	t.join();
180	<	} catch(Exception e){
181	<	unexpectedException();
182	<	}
183	<	}
163	>	public void testLock() {
164	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
165	>	assertNotWriteLocked(lock);
166	>	lock.writeLock().lock();
167	>	assertWriteLockedBy(lock, Thread.currentThread());
168	>	lock.writeLock().unlock();
169	>	assertNotWriteLocked(lock);
170	>	assertEquals(0, lock.getReadLockCount());
171	>	lock.readLock().lock();
172	>	assertNotWriteLocked(lock);
173	>	assertEquals(1, lock.getReadLockCount());
174	>	lock.readLock().unlock();
175	>	assertNotWriteLocked(lock);
176	>	assertEquals(0, lock.getReadLockCount());
177	>	}
178
179		/**
180	<	* timed write-trylock is interruptible
180	>	* locking an unlocked fair lock succeeds
181		*/
182	<	public void testWriteTryLock_Interrupted() {
183	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
184	<	lock.writeLock().lock();
185	<	Thread t = new Thread(new Runnable() {
186	<	public void run() {
187	<	try {
188	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
189	<	threadShouldThrow();
190	<	} catch(InterruptedException success){}
191	<	}
192	<	});
193	<	try {
194	<	t.start();
195	<	t.interrupt();
202	<	lock.writeLock().unlock();
203	<	t.join();
204	<	} catch(Exception e){
205	<	unexpectedException();
206	<	}
182	>	public void testFairLock() {
183	>	PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
184	>	assertNotWriteLocked(lock);
185	>	lock.writeLock().lock();
186	>	assertWriteLockedBy(lock, Thread.currentThread());
187	>	lock.writeLock().unlock();
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>	lock.readLock().lock();
191	>	assertNotWriteLocked(lock);
192	>	assertEquals(1, lock.getReadLockCount());
193	>	lock.readLock().unlock();
194	>	assertNotWriteLocked(lock);
195	>	assertEquals(0, lock.getReadLockCount());
196		}
197
198		/**
199	<	* read-lockInterruptibly is interruptible
199	>	* getWriteHoldCount returns number of recursive holds
200		*/
201	<	public void testReadLockInterruptibly_Interrupted() {
202	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	<	lock.writeLock().lock();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run() {
206	<	try {
207	<	lock.readLock().lockInterruptibly();
219	<	threadShouldThrow();
220	<	} catch(InterruptedException success){}
221	<	}
222	<	});
223	<	try {
224	<	t.start();
225	<	t.interrupt();
201	>	public void testGetWriteHoldCount() {
202	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
203	>	for (int i = 1; i <= SIZE; i++) {
204	>	lock.writeLock().lock();
205	>	assertEquals(i,lock.getWriteHoldCount());
206	>	}
207	>	for (int i = SIZE; i > 0; i--) {
208		lock.writeLock().unlock();
209	<	t.join();
228	<	} catch(Exception e){
229	<	unexpectedException();
209	>	assertEquals(i-1,lock.getWriteHoldCount());
210		}
211	<	}
211	>	}
212
213		/**
214	<	* timed read-trylock is interruptible
214	>	* WriteLock.getHoldCount returns number of recursive holds
215		*/
216	<	public void testReadTryLock_Interrupted() {
217	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	<	lock.writeLock().lock();
219	<	Thread t = new Thread(new Runnable() {
220	<	public void run() {
221	<	try {
222	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
223	<	threadShouldThrow();
224	<	} catch(InterruptedException success){}
245	<	}
246	<	});
247	<	try {
248	<	t.start();
249	<	t.interrupt();
250	<	t.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
216	>	public void testGetHoldCount() {
217	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
218	>	for (int i = 1; i <= SIZE; i++) {
219	>	lock.writeLock().lock();
220	>	assertEquals(i,lock.writeLock().getHoldCount());
221	>	}
222	>	for (int i = SIZE; i > 0; i--) {
223	>	lock.writeLock().unlock();
224	>	assertEquals(i-1,lock.writeLock().getHoldCount());
225		}
226		}
227
256	–
228		/**
229	<	* write-trylock fails if locked
229	>	* getReadHoldCount returns number of recursive holds
230		*/
231	<	public void testWriteTryLockWhenLocked() {
232	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	<	lock.writeLock().lock();
234	<	Thread t = new Thread(new Runnable() {
235	<	public void run() {
236	<	threadAssertFalse(lock.writeLock().tryLock());
237	<	}
238	<	});
239	<	try {
269	<	t.start();
270	<	t.join();
271	<	lock.writeLock().unlock();
272	<	} catch(Exception e){
273	<	unexpectedException();
231	>	public void testGetReadHoldCount() {
232	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
233	>	for (int i = 1; i <= SIZE; i++) {
234	>	lock.readLock().lock();
235	>	assertEquals(i,lock.getReadHoldCount());
236	>	}
237	>	for (int i = SIZE; i > 0; i--) {
238	>	lock.readLock().unlock();
239	>	assertEquals(i-1,lock.getReadHoldCount());
240		}
241	<	}
241	>	}
242
243		/**
244	<	* read-trylock fails if locked
244	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testReadTryLockWhenLocked() {
247	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
282	<	lock.writeLock().lock();
283	<	Thread t = new Thread(new Runnable() {
284	<	public void run() {
285	<	threadAssertFalse(lock.readLock().tryLock());
286	<	}
287	<	});
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248		try {
289	–	t.start();
290	–	t.join();
249		lock.writeLock().unlock();
250	<	} catch(Exception e){
251	<	unexpectedException();
252	<	}
295	<	}
250	>	shouldThrow();
251	>	} catch (IllegalMonitorStateException success) {}
252	>	}
253
254		/**
255	<	* Multiple threads can hold a read lock when not write-locked
255	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
256		*/
257	<	public void testMultipleReadLocks() {
258	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
302	<	lock.readLock().lock();
303	<	Thread t = new Thread(new Runnable() {
304	<	public void run() {
305	<	threadAssertTrue(lock.readLock().tryLock());
306	<	lock.readLock().unlock();
307	<	}
308	<	});
257	>	public void testReadUnlock_IllegalMonitorStateException() {
258	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259		try {
310	–	t.start();
311	–	t.join();
260		lock.readLock().unlock();
261	<	} catch(Exception e){
262	<	unexpectedException();
263	<	}
316	<	}
261	>	shouldThrow();
262	>	} catch (IllegalMonitorStateException success) {}
263	>	}
264
265		/**
266	<	* A writelock succeeds after reading threads unlock
266	>	* write-lockInterruptibly is interruptible
267		*/
268	<	public void testWriteAfterMultipleReadLocks() {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	lock.readLock().lock();
271	<	Thread t1 = new Thread(new Runnable() {
272	<	public void run() {
273	<	lock.readLock().lock();
274	<	lock.readLock().unlock();
328	<	}
329	<	});
330	<	Thread t2 = new Thread(new Runnable() {
331	<	public void run() {
332	<	lock.writeLock().lock();
333	<	lock.writeLock().unlock();
334	<	}
335	<	});
268	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
269	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
270	>	lock.writeLock().lock();
271	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	lock.writeLock().lockInterruptibly();
274	>	}});
275
276	<	try {
277	<	t1.start();
278	<	t2.start();
279	<	Thread.sleep(SHORT_DELAY_MS);
280	<	lock.readLock().unlock();
342	<	t1.join(MEDIUM_DELAY_MS);
343	<	t2.join(MEDIUM_DELAY_MS);
344	<	assertTrue(!t1.isAlive());
345	<	assertTrue(!t2.isAlive());
346	<
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
276	>	waitForQueuedThread(lock, t);
277	>	t.interrupt();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280	>	}
281
282		/**
283	<	* Readlocks succeed after a writing thread unlocks
283	>	* timed write-tryLock is interruptible
284		*/
285	<	public void testReadAfterWriteLock() {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287	<	lock.writeLock().lock();
288	<	Thread t1 = new Thread(new Runnable() {
289	<	public void run() {
290	<	lock.readLock().lock();
291	<	lock.readLock().unlock();
362	<	}
363	<	});
364	<	Thread t2 = new Thread(new Runnable() {
365	<	public void run() {
366	<	lock.readLock().lock();
367	<	lock.readLock().unlock();
368	<	}
369	<	});
370	<
371	<	try {
372	<	t1.start();
373	<	t2.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
375	<	lock.writeLock().unlock();
376	<	t1.join(MEDIUM_DELAY_MS);
377	<	t2.join(MEDIUM_DELAY_MS);
378	<	assertTrue(!t1.isAlive());
379	<	assertTrue(!t2.isAlive());
380	<
381	<	} catch(Exception e){
382	<	unexpectedException();
383	<	}
384	<	}
285	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
286	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
287	>	lock.writeLock().lock();
288	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
289	>	public void realRun() throws InterruptedException {
290	>	lock.writeLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
291	>	}});
292
293	+	waitForQueuedThread(lock, t);
294	+	t.interrupt();
295	+	awaitTermination(t);
296	+	releaseWriteLock(lock);
297	+	}
298
299		/**
300	<	* Read trylock succeeds if readlocked but not writelocked
300	>	* read-lockInterruptibly is interruptible
301		*/
302	<	public void testTryLockWhenReadLocked() {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	<	lock.readLock().lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	threadAssertTrue(lock.readLock().tryLock());
308	<	lock.readLock().unlock();
397	<	}
398	<	});
399	<	try {
400	<	t.start();
401	<	t.join();
402	<	lock.readLock().unlock();
403	<	} catch(Exception e){
404	<	unexpectedException();
405	<	}
406	<	}
302	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
303	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
304	>	lock.writeLock().lock();
305	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
306	>	public void realRun() throws InterruptedException {
307	>	lock.readLock().lockInterruptibly();
308	>	}});
309
310	<
310	>	waitForQueuedThread(lock, t);
311	>	t.interrupt();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314	>	}
315
316		/**
317	<	* write trylock fails when readlocked
317	>	* timed read-tryLock is interruptible
318		*/
319	<	public void testWriteTryLockWhenReadLocked() {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
321	<	lock.readLock().lock();
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	threadAssertFalse(lock.writeLock().tryLock());
325	<	}
420	<	});
421	<	try {
422	<	t.start();
423	<	t.join();
424	<	lock.readLock().unlock();
425	<	} catch(Exception e){
426	<	unexpectedException();
427	<	}
428	<	}
319	>	public void testReadTryLock_Interrupted() throws InterruptedException {
320	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
321	>	lock.writeLock().lock();
322	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
323	>	public void realRun() throws InterruptedException {
324	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
325	>	}});
326
327	<
327	>	waitForQueuedThread(lock, t);
328	>	t.interrupt();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331	>	}
332
333		/**
334	<	* write timed trylock times out if locked
334	>	* write-tryLock fails if locked
335		*/
336	<	public void testWriteTryLock_Timeout() {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
338	<	lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	try {
342	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
343	<	} catch (Exception ex) {
344	<	threadUnexpectedException();
345	<	}
346	<	}
446	<	});
447	<	try {
448	<	t.start();
449	<	t.join();
450	<	lock.writeLock().unlock();
451	<	} catch(Exception e){
452	<	unexpectedException();
453	<	}
454	<	}
336	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
337	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
338	>	lock.writeLock().lock();
339	>	Thread t = newStartedThread(new CheckedRunnable() {
340	>	public void realRun() {
341	>	assertFalse(lock.writeLock().tryLock());
342	>	}});
343	>
344	>	awaitTermination(t);
345	>	releaseWriteLock(lock);
346	>	}
347
348		/**
349	<	* read timed trylock times out if write-locked
349	>	* read-tryLock fails if locked
350		*/
351	<	public void testReadTryLock_Timeout() {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
353	<	lock.writeLock().lock();
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	try {
357	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
358	<	} catch (Exception ex) {
359	<	threadUnexpectedException();
360	<	}
361	<	}
470	<	});
471	<	try {
472	<	t.start();
473	<	t.join();
474	<	lock.writeLock().unlock();
475	<	} catch(Exception e){
476	<	unexpectedException();
477	<	}
478	<	}
351	>	public void testReadTryLockWhenLocked() throws InterruptedException {
352	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
353	>	lock.writeLock().lock();
354	>	Thread t = newStartedThread(new CheckedRunnable() {
355	>	public void realRun() {
356	>	assertFalse(lock.readLock().tryLock());
357	>	}});
358	>
359	>	awaitTermination(t);
360	>	releaseWriteLock(lock);
361	>	}
362
363	+	/**
364	+	* Multiple threads can hold a read lock when not write-locked
365	+	*/
366	+	public void testMultipleReadLocks() throws InterruptedException {
367	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	+	lock.readLock().lock();
369	+	Thread t = newStartedThread(new CheckedRunnable() {
370	+	public void realRun() {
371	+	assertTrue(lock.readLock().tryLock());
372	+	lock.readLock().unlock();
373	+	}});
374	+
375	+	awaitTermination(t);
376	+	lock.readLock().unlock();
377	+	}
378	+
379	+	/**
380	+	* A writelock succeeds only after a reading thread unlocks
381	+	*/
382	+	public void testWriteAfterReadLock() throws InterruptedException {
383	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
384	+	lock.readLock().lock();
385	+
386	+	Thread t = newStartedThread(new CheckedRunnable() {
387	+	public void realRun() {
388	+	assertEquals(1, lock.getReadLockCount());
389	+	lock.writeLock().lock();
390	+	assertEquals(0, lock.getReadLockCount());
391	+	lock.writeLock().unlock();
392	+	}});
393	+	waitForQueuedThread(lock, t);
394	+	assertNotWriteLocked(lock);
395	+	assertEquals(1, lock.getReadLockCount());
396	+	lock.readLock().unlock();
397	+	assertEquals(0, lock.getReadLockCount());
398	+	awaitTermination(t);
399	+	assertNotWriteLocked(lock);
400	+	}
401	+
402	+	/**
403	+	* A writelock succeeds only after reading threads unlock
404	+	*/
405	+	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
406	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
407	+	lock.readLock().lock();
408	+	lock.readLock().lock();
409	+	Thread t1 = newStartedThread(new CheckedRunnable() {
410	+	public void realRun() {
411	+	lock.readLock().lock();
412	+	assertEquals(3, lock.getReadLockCount());
413	+	lock.readLock().unlock();
414	+	}});
415	+	awaitTermination(t1);
416	+
417	+	Thread t2 = newStartedThread(new CheckedRunnable() {
418	+	public void realRun() {
419	+	assertEquals(2, lock.getReadLockCount());
420	+	lock.writeLock().lock();
421	+	assertEquals(0, lock.getReadLockCount());
422	+	lock.writeLock().unlock();
423	+	}});
424	+	waitForQueuedThread(lock, t2);
425	+	assertNotWriteLocked(lock);
426	+	assertEquals(2, lock.getReadLockCount());
427	+	lock.readLock().unlock();
428	+	lock.readLock().unlock();
429	+	assertEquals(0, lock.getReadLockCount());
430	+	awaitTermination(t2);
431	+	assertNotWriteLocked(lock);
432	+	}
433	+
434	+	/**
435	+	* A thread that tries to acquire a fair read lock (non-reentrantly)
436	+	* will block if there is a waiting writer thread.
437	+	*/
438	+	public void testReaderWriterReaderFairFifo() throws InterruptedException {
439	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
440	+	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
441	+
442	+	lock.readLock().lock();
443	+	Thread t1 = newStartedThread(new CheckedRunnable() {
444	+	public void realRun() {
445	+	assertEquals(1, lock.getReadLockCount());
446	+	lock.writeLock().lock();
447	+	assertEquals(0, lock.getReadLockCount());
448	+	t1GotLock.set(true);
449	+	lock.writeLock().unlock();
450	+	}});
451	+	waitForQueuedThread(lock, t1);
452	+
453	+	Thread t2 = newStartedThread(new CheckedRunnable() {
454	+	public void realRun() {
455	+	assertEquals(1, lock.getReadLockCount());
456	+	lock.readLock().lock();
457	+	assertEquals(1, lock.getReadLockCount());
458	+	assertTrue(t1GotLock.get());
459	+	lock.readLock().unlock();
460	+	}});
461	+	waitForQueuedThread(lock, t2);
462	+	assertTrue(t1.isAlive());
463	+	assertNotWriteLocked(lock);
464	+	assertEquals(1, lock.getReadLockCount());
465	+	lock.readLock().unlock();
466	+	awaitTermination(t1);
467	+	awaitTermination(t2);
468	+	assertNotWriteLocked(lock);
469	+	}
470	+
471	+	/**
472	+	* Readlocks succeed only after a writing thread unlocks
473	+	*/
474	+	public void testReadAfterWriteLock() throws InterruptedException {
475	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
476	+	lock.writeLock().lock();
477	+	Thread t1 = newStartedThread(new CheckedRunnable() {
478	+	public void realRun() {
479	+	lock.readLock().lock();
480	+	lock.readLock().unlock();
481	+	}});
482	+	Thread t2 = newStartedThread(new CheckedRunnable() {
483	+	public void realRun() {
484	+	lock.readLock().lock();
485	+	lock.readLock().unlock();
486	+	}});
487	+
488	+	waitForQueuedThread(lock, t1);
489	+	waitForQueuedThread(lock, t2);
490	+	releaseWriteLock(lock);
491	+	awaitTermination(t1);
492	+	awaitTermination(t2);
493	+	}
494	+
495	+	/**
496	+	* Read trylock succeeds if write locked by current thread
497	+	*/
498	+	public void testReadHoldingWriteLock() {
499	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
500	+	lock.writeLock().lock();
501	+	assertTrue(lock.readLock().tryLock());
502	+	lock.readLock().unlock();
503	+	lock.writeLock().unlock();
504	+	}
505	+
506	+	/**
507	+	* Read lock succeeds if write locked by current thread even if
508	+	* other threads are waiting for readlock
509	+	*/
510	+	public void testReadHoldingWriteLock2() throws InterruptedException {
511	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
512	+	lock.writeLock().lock();
513	+	lock.readLock().lock();
514	+	lock.readLock().unlock();
515	+
516	+	Thread t1 = newStartedThread(new CheckedRunnable() {
517	+	public void realRun() {
518	+	lock.readLock().lock();
519	+	lock.readLock().unlock();
520	+	}});
521	+	Thread t2 = newStartedThread(new CheckedRunnable() {
522	+	public void realRun() {
523	+	lock.readLock().lock();
524	+	lock.readLock().unlock();
525	+	}});
526	+
527	+	waitForQueuedThread(lock, t1);
528	+	waitForQueuedThread(lock, t2);
529	+	assertWriteLockedBy(lock, Thread.currentThread());
530	+	lock.readLock().lock();
531	+	lock.readLock().unlock();
532	+	releaseWriteLock(lock);
533	+	awaitTermination(t1);
534	+	awaitTermination(t2);
535	+	}
536	+
537	+	/**
538	+	* Read lock succeeds if write locked by current thread even if
539	+	* other threads are waiting for writelock
540	+	*/
541	+	public void testReadHoldingWriteLock3() throws InterruptedException {
542	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
543	+	lock.writeLock().lock();
544	+	lock.readLock().lock();
545	+	lock.readLock().unlock();
546	+
547	+	Thread t1 = newStartedThread(new CheckedRunnable() {
548	+	public void realRun() {
549	+	lock.writeLock().lock();
550	+	lock.writeLock().unlock();
551	+	}});
552	+	Thread t2 = newStartedThread(new CheckedRunnable() {
553	+	public void realRun() {
554	+	lock.writeLock().lock();
555	+	lock.writeLock().unlock();
556	+	}});
557	+
558	+	waitForQueuedThread(lock, t1);
559	+	waitForQueuedThread(lock, t2);
560	+	assertWriteLockedBy(lock, Thread.currentThread());
561	+	lock.readLock().lock();
562	+	lock.readLock().unlock();
563	+	releaseWriteLock(lock);
564	+	awaitTermination(t1);
565	+	awaitTermination(t2);
566	+	}
567	+
568	+	/**
569	+	* Write lock succeeds if write locked by current thread even if
570	+	* other threads are waiting for writelock
571	+	*/
572	+	public void testWriteHoldingWriteLock4() throws InterruptedException {
573	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
574	+	lock.writeLock().lock();
575	+	lock.writeLock().lock();
576	+	lock.writeLock().unlock();
577	+
578	+	Thread t1 = newStartedThread(new CheckedRunnable() {
579	+	public void realRun() {
580	+	lock.writeLock().lock();
581	+	lock.writeLock().unlock();
582	+	}});
583	+	Thread t2 = newStartedThread(new CheckedRunnable() {
584	+	public void realRun() {
585	+	lock.writeLock().lock();
586	+	lock.writeLock().unlock();
587	+	}});
588	+
589	+	waitForQueuedThread(lock, t1);
590	+	waitForQueuedThread(lock, t2);
591	+	assertWriteLockedBy(lock, Thread.currentThread());
592	+	assertEquals(1, lock.getWriteHoldCount());
593	+	lock.writeLock().lock();
594	+	assertWriteLockedBy(lock, Thread.currentThread());
595	+	assertEquals(2, lock.getWriteHoldCount());
596	+	lock.writeLock().unlock();
597	+	releaseWriteLock(lock);
598	+	awaitTermination(t1);
599	+	awaitTermination(t2);
600	+	}
601	+
602	+	/**
603	+	* Fair Read trylock succeeds if write locked by current thread
604	+	*/
605	+	public void testReadHoldingWriteLockFair() {
606	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
607	+	lock.writeLock().lock();
608	+	assertTrue(lock.readLock().tryLock());
609	+	lock.readLock().unlock();
610	+	lock.writeLock().unlock();
611	+	}
612	+
613	+	/**
614	+	* Fair Read lock succeeds if write locked by current thread even if
615	+	* other threads are waiting for readlock
616	+	*/
617	+	public void testReadHoldingWriteLockFair2() throws InterruptedException {
618	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
619	+	lock.writeLock().lock();
620	+	lock.readLock().lock();
621	+	lock.readLock().unlock();
622	+
623	+	Thread t1 = newStartedThread(new CheckedRunnable() {
624	+	public void realRun() {
625	+	lock.readLock().lock();
626	+	lock.readLock().unlock();
627	+	}});
628	+	Thread t2 = newStartedThread(new CheckedRunnable() {
629	+	public void realRun() {
630	+	lock.readLock().lock();
631	+	lock.readLock().unlock();
632	+	}});
633	+
634	+	waitForQueuedThread(lock, t1);
635	+	waitForQueuedThread(lock, t2);
636	+	assertWriteLockedBy(lock, Thread.currentThread());
637	+	lock.readLock().lock();
638	+	lock.readLock().unlock();
639	+	releaseWriteLock(lock);
640	+	awaitTermination(t1);
641	+	awaitTermination(t2);
642	+	}
643	+
644	+	/**
645	+	* Fair Read lock succeeds if write locked by current thread even if
646	+	* other threads are waiting for writelock
647	+	*/
648	+	public void testReadHoldingWriteLockFair3() throws InterruptedException {
649	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
650	+	lock.writeLock().lock();
651	+	lock.readLock().lock();
652	+	lock.readLock().unlock();
653	+
654	+	Thread t1 = newStartedThread(new CheckedRunnable() {
655	+	public void realRun() {
656	+	lock.writeLock().lock();
657	+	lock.writeLock().unlock();
658	+	}});
659	+	Thread t2 = newStartedThread(new CheckedRunnable() {
660	+	public void realRun() {
661	+	lock.writeLock().lock();
662	+	lock.writeLock().unlock();
663	+	}});
664	+
665	+	waitForQueuedThread(lock, t1);
666	+	waitForQueuedThread(lock, t2);
667	+	assertWriteLockedBy(lock, Thread.currentThread());
668	+	lock.readLock().lock();
669	+	lock.readLock().unlock();
670	+	releaseWriteLock(lock);
671	+	awaitTermination(t1);
672	+	awaitTermination(t2);
673	+	}
674	+
675	+	/**
676	+	* Fair Write lock succeeds if write locked by current thread even if
677	+	* other threads are waiting for writelock
678	+	*/
679	+	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
680	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(true);
681	+	lock.writeLock().lock();
682	+	Thread t1 = newStartedThread(new CheckedRunnable() {
683	+	public void realRun() {
684	+	lock.writeLock().lock();
685	+	lock.writeLock().unlock();
686	+	}});
687	+	Thread t2 = newStartedThread(new CheckedRunnable() {
688	+	public void realRun() {
689	+	lock.writeLock().lock();
690	+	lock.writeLock().unlock();
691	+	}});
692	+
693	+	waitForQueuedThread(lock, t1);
694	+	waitForQueuedThread(lock, t2);
695	+	assertWriteLockedBy(lock, Thread.currentThread());
696	+	assertEquals(1, lock.getWriteHoldCount());
697	+	lock.writeLock().lock();
698	+	assertEquals(2, lock.getWriteHoldCount());
699	+	lock.writeLock().unlock();
700	+	lock.writeLock().lock();
701	+	lock.writeLock().unlock();
702	+	releaseWriteLock(lock);
703	+	awaitTermination(t1);
704	+	awaitTermination(t2);
705	+	}
706	+
707	+	/**
708	+	* Read tryLock succeeds if readlocked but not writelocked
709	+	*/
710	+	public void testTryLockWhenReadLocked() throws InterruptedException {
711	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	+	lock.readLock().lock();
713	+	Thread t = newStartedThread(new CheckedRunnable() {
714	+	public void realRun() {
715	+	assertTrue(lock.readLock().tryLock());
716	+	lock.readLock().unlock();
717	+	}});
718	+
719	+	awaitTermination(t);
720	+	lock.readLock().unlock();
721	+	}
722	+
723	+	/**
724	+	* write tryLock fails when readlocked
725	+	*/
726	+	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
727	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	+	lock.readLock().lock();
729	+	Thread t = newStartedThread(new CheckedRunnable() {
730	+	public void realRun() {
731	+	assertFalse(lock.writeLock().tryLock());
732	+	}});
733	+
734	+	awaitTermination(t);
735	+	lock.readLock().unlock();
736	+	}
737	+
738	+	/**
739	+	* Fair Read tryLock succeeds if readlocked but not writelocked
740	+	*/
741	+	public void testTryLockWhenReadLockedFair() throws InterruptedException {
742	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
743	+	lock.readLock().lock();
744	+	Thread t = newStartedThread(new CheckedRunnable() {
745	+	public void realRun() {
746	+	assertTrue(lock.readLock().tryLock());
747	+	lock.readLock().unlock();
748	+	}});
749	+
750	+	awaitTermination(t);
751	+	lock.readLock().unlock();
752	+	}
753	+
754	+	/**
755	+	* Fair write tryLock fails when readlocked
756	+	*/
757	+	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
758	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
759	+	lock.readLock().lock();
760	+	Thread t = newStartedThread(new CheckedRunnable() {
761	+	public void realRun() {
762	+	assertFalse(lock.writeLock().tryLock());
763	+	}});
764	+
765	+	awaitTermination(t);
766	+	lock.readLock().unlock();
767	+	}
768	+
769	+	/**
770	+	* write timed tryLock times out if locked
771	+	*/
772	+	public void testWriteTryLock_Timeout() throws InterruptedException {
773	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	+	lock.writeLock().lock();
775	+	Thread t = newStartedThread(new CheckedRunnable() {
776	+	public void realRun() throws InterruptedException {
777	+	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
778	+	}});
779	+
780	+	awaitTermination(t);
781	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
782	+	lock.writeLock().unlock();
783	+	}
784	+
785	+	/**
786	+	* read timed tryLock times out if write-locked
787	+	*/
788	+	public void testReadTryLock_Timeout() throws InterruptedException {
789	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	+	lock.writeLock().lock();
791	+	Thread t = newStartedThread(new CheckedRunnable() {
792	+	public void realRun() throws InterruptedException {
793	+	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
794	+	}});
795	+
796	+	awaitTermination(t);
797	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
798	+	lock.writeLock().unlock();
799	+	}
800
801		/**
802		* write lockInterruptibly succeeds if lock free else is interruptible
803		*/
804	<	public void testWriteLockInterruptibly() {
805	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
806	<	try {
807	<	lock.writeLock().lockInterruptibly();
808	<	} catch(Exception e) {
809	<	unexpectedException();
810	<	}
811	<	Thread t = new Thread(new Runnable() {
812	<	public void run() {
813	<	try {
814	<	lock.writeLock().lockInterruptibly();
815	<	threadShouldThrow();
496	<	}
497	<	catch(InterruptedException success) {
498	<	}
499	<	}
500	<	});
501	<	try {
502	<	t.start();
503	<	t.interrupt();
504	<	t.join();
505	<	lock.writeLock().unlock();
506	<	} catch(Exception e){
507	<	unexpectedException();
508	<	}
804	>	public void testWriteLockInterruptibly() throws InterruptedException {
805	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
806	>	lock.writeLock().lockInterruptibly();
807	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
808	>	public void realRun() throws InterruptedException {
809	>	lock.writeLock().lockInterruptibly();
810	>	}});
811	>
812	>	waitForQueuedThread(lock, t);
813	>	t.interrupt();
814	>	awaitTermination(t);
815	>	releaseWriteLock(lock);
816		}
817
818		/**
819	<	*  read lockInterruptibly succeeds if lock free else is interruptible
819	>	* read lockInterruptibly succeeds if lock free else is interruptible
820		*/
821	<	public void testReadLockInterruptibly() {
822	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
823	<	try {
824	<	lock.writeLock().lockInterruptibly();
825	<	} catch(Exception e) {
826	<	unexpectedException();
827	<	}
828	<	Thread t = new Thread(new Runnable() {
829	<	public void run() {
830	<	try {
831	<	lock.readLock().lockInterruptibly();
832	<	threadShouldThrow();
526	<	}
527	<	catch(InterruptedException success) {
528	<	}
529	<	}
530	<	});
531	<	try {
532	<	t.start();
533	<	t.interrupt();
534	<	t.join();
535	<	lock.writeLock().unlock();
536	<	} catch(Exception e){
537	<	unexpectedException();
538	<	}
821	>	public void testReadLockInterruptibly() throws InterruptedException {
822	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
823	>	lock.writeLock().lockInterruptibly();
824	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	lock.readLock().lockInterruptibly();
827	>	}});
828	>
829	>	waitForQueuedThread(lock, t);
830	>	t.interrupt();
831	>	awaitTermination(t);
832	>	releaseWriteLock(lock);
833		}
834
835		/**
836		* Calling await without holding lock throws IllegalMonitorStateException
837		*/
838	<	public void testAwait_IllegalMonitor() {
839	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
838	>	public void testAwait_IllegalMonitor() throws InterruptedException {
839	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
840		final Condition c = lock.writeLock().newCondition();
841		try {
842		c.await();
843		shouldThrow();
844	<	}
845	<	catch (IllegalMonitorStateException success) {
846	<	}
553	<	catch (Exception ex) {
844	>	} catch (IllegalMonitorStateException success) {}
845	>	try {
846	>	c.await(LONG_DELAY_MS, MILLISECONDS);
847		shouldThrow();
848	<	}
848	>	} catch (IllegalMonitorStateException success) {}
849	>	try {
850	>	c.awaitNanos(100);
851	>	shouldThrow();
852	>	} catch (IllegalMonitorStateException success) {}
853	>	try {
854	>	c.awaitUninterruptibly();
855	>	shouldThrow();
856	>	} catch (IllegalMonitorStateException success) {}
857		}
858
859		/**
860		* Calling signal without holding lock throws IllegalMonitorStateException
861		*/
862		public void testSignal_IllegalMonitor() {
863	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
863	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
864		final Condition c = lock.writeLock().newCondition();
865		try {
866		c.signal();
867		shouldThrow();
868	<	}
568	<	catch (IllegalMonitorStateException success) {
569	<	}
570	<	catch (Exception ex) {
571	<	unexpectedException();
572	<	}
868	>	} catch (IllegalMonitorStateException success) {}
869		}
870
871		/**
872	<	* awaitNanos without a signal times out
872	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
873		*/
874	<	public void testAwaitNanos_Timeout() {
875	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
874	>	public void testSignalAll_IllegalMonitor() {
875	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
876		final Condition c = lock.writeLock().newCondition();
877		try {
878	<	lock.writeLock().lock();
879	<	long t = c.awaitNanos(100);
880	<	assertTrue(t <= 0);
585	<	lock.writeLock().unlock();
586	<	}
587	<	catch (Exception ex) {
588	<	unexpectedException();
589	<	}
878	>	c.signalAll();
879	>	shouldThrow();
880	>	} catch (IllegalMonitorStateException success) {}
881		}
882
883	+	/**
884	+	* awaitNanos without a signal times out
885	+	*/
886	+	public void testAwaitNanos_Timeout() throws InterruptedException {
887	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
888	+	final Condition c = lock.writeLock().newCondition();
889	+	lock.writeLock().lock();
890	+	long startTime = System.nanoTime();
891	+	long timeoutMillis = 10;
892	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
893	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
894	+	assertTrue(nanosRemaining <= 0);
895	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
896	+	lock.writeLock().unlock();
897	+	}
898
899		/**
900	<	*  timed await without a signal times out
900	>	* timed await without a signal times out
901		*/
902	<	public void testAwait_Timeout() {
903	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
902	>	public void testAwait_Timeout() throws InterruptedException {
903	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
904		final Condition c = lock.writeLock().newCondition();
905	<	try {
906	<	lock.writeLock().lock();
907	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
908	<	lock.writeLock().unlock();
909	<	}
910	<	catch (Exception ex) {
605	<	unexpectedException();
606	<	}
905	>	lock.writeLock().lock();
906	>	long startTime = System.nanoTime();
907	>	long timeoutMillis = 10;
908	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
909	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
910	>	lock.writeLock().unlock();
911		}
912
913		/**
914		* awaitUntil without a signal times out
915		*/
916	<	public void testAwaitUntil_Timeout() {
917	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
916	>	public void testAwaitUntil_Timeout() throws InterruptedException {
917	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
918		final Condition c = lock.writeLock().newCondition();
919	<	try {
920	<	lock.writeLock().lock();
921	<	java.util.Date d = new java.util.Date();
922	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
619	<	lock.writeLock().unlock();
620	<	}
621	<	catch (Exception ex) {
622	<	unexpectedException();
623	<	}
919	>	lock.writeLock().lock();
920	>	java.util.Date d = new java.util.Date();
921	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
922	>	lock.writeLock().unlock();
923		}
924
925		/**
926		* await returns when signalled
927		*/
928	<	public void testAwait() {
929	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
928	>	public void testAwait() throws InterruptedException {
929	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
930		final Condition c = lock.writeLock().newCondition();
931	<	Thread t = new Thread(new Runnable() {
932	<	public void run() {
933	<	try {
934	<	lock.writeLock().lock();
935	<	c.await();
936	<	lock.writeLock().unlock();
937	<	}
938	<	catch(InterruptedException e) {
939	<	threadUnexpectedException();
940	<	}
941	<	}
942	<	});
943	<
944	<	try {
945	<	t.start();
647	<	Thread.sleep(SHORT_DELAY_MS);
648	<	lock.writeLock().lock();
649	<	c.signal();
650	<	lock.writeLock().unlock();
651	<	t.join(SHORT_DELAY_MS);
652	<	assertFalse(t.isAlive());
653	<	}
654	<	catch (Exception ex) {
655	<	unexpectedException();
656	<	}
931	>	final CountDownLatch locked = new CountDownLatch(1);
932	>	Thread t = newStartedThread(new CheckedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	lock.writeLock().lock();
935	>	locked.countDown();
936	>	c.await();
937	>	lock.writeLock().unlock();
938	>	}});
939	>
940	>	locked.await();
941	>	lock.writeLock().lock();
942	>	c.signal();
943	>	assertTrue(t.isAlive());
944	>	lock.writeLock().unlock();
945	>	awaitTermination(t);
946		}
947
948		/**
949		* awaitUninterruptibly doesn't abort on interrupt
950		*/
951	<	public void testAwaitUninterruptibly() {
952	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
951	>	public void testAwaitUninterruptibly() throws InterruptedException {
952	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953		final Condition c = lock.writeLock().newCondition();
954	<	Thread t = new Thread(new Runnable() {
955	<	public void run() {
956	<	lock.writeLock().lock();
957	<	c.awaitUninterruptibly();
958	<	lock.writeLock().unlock();
959	<	}
960	<	});
961	<
962	<	try {
963	<	t.start();
964	<	Thread.sleep(SHORT_DELAY_MS);
965	<	t.interrupt();
966	<	lock.writeLock().lock();
967	<	c.signal();
968	<	lock.writeLock().unlock();
969	<	assert(t.isInterrupted());
970	<	t.join(SHORT_DELAY_MS);
971	<	assertFalse(t.isAlive());
972	<	}
973	<	catch (Exception ex) {
974	<	unexpectedException();
686	<	}
954	>	final CountDownLatch locked = new CountDownLatch(1);
955	>	final AtomicBoolean canAwake = new AtomicBoolean(false);
956	>	Thread t = newStartedThread(new CheckedRunnable() {
957	>	public void realRun() {
958	>	lock.writeLock().lock();
959	>	locked.countDown();
960	>	c.awaitUninterruptibly();
961	>	assertTrue(Thread.interrupted());
962	>	lock.writeLock().unlock();
963	>	}});
964	>
965	>	locked.await();
966	>	lock.writeLock().lock();
967	>	lock.writeLock().unlock();
968	>	t.interrupt();
969	>	t.join(10);
970	>	assertTrue(t.isAlive());
971	>	lock.writeLock().lock();
972	>	c.signal();
973	>	lock.writeLock().unlock();
974	>	awaitTermination(t);
975		}
976
977		/**
978		* await is interruptible
979		*/
980	<	public void testAwait_Interrupt() {
981	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
980	>	public void testAwait_Interrupt() throws InterruptedException {
981	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
982		final Condition c = lock.writeLock().newCondition();
983	<	Thread t = new Thread(new Runnable() {
984	<	public void run() {
985	<	try {
986	<	lock.writeLock().lock();
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	threadShouldThrow();
990	<	}
991	<	catch(InterruptedException success) {
992	<	}
993	<	}
994	<	});
995	<
996	<	try {
997	<	t.start();
998	<	Thread.sleep(SHORT_DELAY_MS);
999	<	t.interrupt();
1000	<	t.join(SHORT_DELAY_MS);
1001	<	assertFalse(t.isAlive());
1002	<	}
1003	<	catch (Exception ex) {
1004	<	unexpectedException();
717	<	}
983	>	final CountDownLatch locked = new CountDownLatch(1);
984	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
985	>	public void realRun() throws InterruptedException {
986	>	lock.writeLock().lock();
987	>	assertWriteLockedBy(lock, Thread.currentThread());
988	>	assertHasNoWaiters(lock, c);
989	>	locked.countDown();
990	>	try {
991	>	c.await();
992	>	} finally {
993	>	assertWriteLockedBy(lock, Thread.currentThread());
994	>	assertHasNoWaiters(lock, c);
995	>	lock.writeLock().unlock();
996	>	assertFalse(Thread.interrupted());
997	>	}
998	>	}});
999	>
1000	>	locked.await();
1001	>	assertHasWaiters(lock, c, t);
1002	>	t.interrupt();
1003	>	awaitTermination(t);
1004	>	assertNotWriteLocked(lock);
1005		}
1006
1007		/**
1008		* awaitNanos is interruptible
1009		*/
1010	<	public void testAwaitNanos_Interrupt() {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1010	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
1011	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1012		final Condition c = lock.writeLock().newCondition();
1013	<	Thread t = new Thread(new Runnable() {
1014	<	public void run() {
1015	<	try {
1016	<	lock.writeLock().lock();
1017	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1018	<	lock.writeLock().unlock();
1019	<	threadShouldThrow();
1020	<	}
1021	<	catch(InterruptedException success) {
1022	<	}
1023	<	}
1024	<	});
1025	<
1026	<	try {
1027	<	t.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	t.interrupt();
1030	<	t.join(SHORT_DELAY_MS);
1031	<	assertFalse(t.isAlive());
1032	<	}
1033	<	catch (Exception ex) {
1034	<	unexpectedException();
748	<	}
1013	>	final CountDownLatch locked = new CountDownLatch(1);
1014	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1015	>	public void realRun() throws InterruptedException {
1016	>	lock.writeLock().lock();
1017	>	assertWriteLockedBy(lock, Thread.currentThread());
1018	>	assertHasNoWaiters(lock, c);
1019	>	locked.countDown();
1020	>	try {
1021	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
1022	>	} finally {
1023	>	assertWriteLockedBy(lock, Thread.currentThread());
1024	>	assertHasNoWaiters(lock, c);
1025	>	lock.writeLock().unlock();
1026	>	assertFalse(Thread.interrupted());
1027	>	}
1028	>	}});
1029	>
1030	>	locked.await();
1031	>	assertHasWaiters(lock, c, t);
1032	>	t.interrupt();
1033	>	awaitTermination(t);
1034	>	assertNotWriteLocked(lock);
1035		}
1036
1037		/**
1038		* awaitUntil is interruptible
1039		*/
1040	<	public void testAwaitUntil_Interrupt() {
1041	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1040	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
1041	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1042		final Condition c = lock.writeLock().newCondition();
1043	<	Thread t = new Thread(new Runnable() {
1044	<	public void run() {
1045	<	try {
1046	<	lock.writeLock().lock();
1047	<	java.util.Date d = new java.util.Date();
1048	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1049	<	lock.writeLock().unlock();
1050	<	threadShouldThrow();
1051	<	}
1052	<	catch(InterruptedException success) {
1053	<	}
1054	<	}
1055	<	});
1056	<
1057	<	try {
1058	<	t.start();
1059	<	Thread.sleep(SHORT_DELAY_MS);
1060	<	t.interrupt();
1061	<	t.join(SHORT_DELAY_MS);
1062	<	assertFalse(t.isAlive());
1063	<	}
1064	<	catch (Exception ex) {
1065	<	unexpectedException();
780	<	}
1043	>	final CountDownLatch locked = new CountDownLatch(1);
1044	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1045	>	public void realRun() throws InterruptedException {
1046	>	lock.writeLock().lock();
1047	>	assertWriteLockedBy(lock, Thread.currentThread());
1048	>	assertHasNoWaiters(lock, c);
1049	>	locked.countDown();
1050	>	java.util.Date d = new java.util.Date();
1051	>	try {
1052	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1053	>	} finally {
1054	>	assertWriteLockedBy(lock, Thread.currentThread());
1055	>	assertHasNoWaiters(lock, c);
1056	>	lock.writeLock().unlock();
1057	>	assertFalse(Thread.interrupted());
1058	>	}
1059	>	}});
1060	>
1061	>	locked.await();
1062	>	assertHasWaiters(lock, c, t);
1063	>	t.interrupt();
1064	>	awaitTermination(t);
1065	>	assertNotWriteLocked(lock);
1066		}
1067
1068		/**
1069		* signalAll wakes up all threads
1070		*/
1071	<	public void testSignalAll() {
1072	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1071	>	public void testSignalAll() throws InterruptedException {
1072	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1073		final Condition c = lock.writeLock().newCondition();
1074	<	Thread t1 = new Thread(new Runnable() {
1075	<	public void run() {
1076	<	try {
1077	<	lock.writeLock().lock();
1078	<	c.await();
1079	<	lock.writeLock().unlock();
1080	<	}
1081	<	catch(InterruptedException e) {
1082	<	threadUnexpectedException();
1083	<	}
1084	<	}
1085	<	});
1086	<
1087	<	Thread t2 = new Thread(new Runnable() {
1088	<	public void run() {
1089	<	try {
1090	<	lock.writeLock().lock();
1091	<	c.await();
1092	<	lock.writeLock().unlock();
1093	<	}
1094	<	catch(InterruptedException e) {
1095	<	threadUnexpectedException();
1096	<	}
1097	<	}
1098	<	});
1074	>	final CountDownLatch locked = new CountDownLatch(2);
1075	>	final Lock writeLock = lock.writeLock();
1076	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1077	>	public void realRun() throws InterruptedException {
1078	>	writeLock.lock();
1079	>	locked.countDown();
1080	>	c.await();
1081	>	writeLock.unlock();
1082	>	}});
1083	>
1084	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1085	>	public void realRun() throws InterruptedException {
1086	>	writeLock.lock();
1087	>	locked.countDown();
1088	>	c.await();
1089	>	writeLock.unlock();
1090	>	}});
1091	>
1092	>	locked.await();
1093	>	writeLock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095	>	c.signalAll();
1096	>	assertHasNoWaiters(lock, c);
1097	>	writeLock.unlock();
1098	>	awaitTermination(t1);
1099	>	awaitTermination(t2);
1100	>	}
1101
1102	<	try {
1103	<	t1.start();
1104	<	t2.start();
1105	<	Thread.sleep(SHORT_DELAY_MS);
1106	<	lock.writeLock().lock();
1107	<	c.signalAll();
1108	<	lock.writeLock().unlock();
1109	<	t1.join(SHORT_DELAY_MS);
1110	<	t2.join(SHORT_DELAY_MS);
1111	<	assertFalse(t1.isAlive());
1112	<	assertFalse(t2.isAlive());
1113	<	}
1114	<	catch (Exception ex) {
1115	<	unexpectedException();
1116	<	}
1102	>	/**
1103	>	* signal wakes up waiting threads in FIFO order.
1104	>	*/
1105	>	public void testSignalWakesFifo() throws InterruptedException {
1106	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1107	>	final Condition c = lock.writeLock().newCondition();
1108	>	final CountDownLatch locked1 = new CountDownLatch(1);
1109	>	final CountDownLatch locked2 = new CountDownLatch(1);
1110	>	final Lock writeLock = lock.writeLock();
1111	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1112	>	public void realRun() throws InterruptedException {
1113	>	writeLock.lock();
1114	>	locked1.countDown();
1115	>	c.await();
1116	>	writeLock.unlock();
1117	>	}});
1118	>
1119	>	locked1.await();
1120	>
1121	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1122	>	public void realRun() throws InterruptedException {
1123	>	writeLock.lock();
1124	>	locked2.countDown();
1125	>	c.await();
1126	>	writeLock.unlock();
1127	>	}});
1128	>
1129	>	locked2.await();
1130	>
1131	>	writeLock.lock();
1132	>	assertHasWaiters(lock, c, t1, t2);
1133	>	assertFalse(lock.hasQueuedThreads());
1134	>	c.signal();
1135	>	assertHasWaiters(lock, c, t2);
1136	>	assertTrue(lock.hasQueuedThread(t1));
1137	>	assertFalse(lock.hasQueuedThread(t2));
1138	>	c.signal();
1139	>	assertHasNoWaiters(lock, c);
1140	>	assertTrue(lock.hasQueuedThread(t1));
1141	>	assertTrue(lock.hasQueuedThread(t2));
1142	>	writeLock.unlock();
1143	>	awaitTermination(t1);
1144	>	awaitTermination(t2);
1145		}
1146
1147		/**
1148		* A serialized lock deserializes as unlocked
1149		*/
1150	<	public void testSerialization() {
1150	>	public void testSerialization() throws Exception {
1151		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1152		l.readLock().lock();
1153		l.readLock().unlock();
1154
1155	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1156	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1157	+	out.writeObject(l);
1158	+	out.close();
1159	+
1160	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1161	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1162	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1163	+	r.readLock().lock();
1164	+	r.readLock().unlock();
1165	+	}
1166	+
1167	+	/**
1168	+	* hasQueuedThreads reports whether there are waiting threads
1169	+	*/
1170	+	public void testhasQueuedThreads() throws InterruptedException {
1171	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1172	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1173	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1174	+	assertFalse(lock.hasQueuedThreads());
1175	+	lock.writeLock().lock();
1176	+	assertFalse(lock.hasQueuedThreads());
1177	+	long startTime = System.nanoTime();
1178	+	t1.start();
1179	+	waitForQueuedThread(lock, t1);
1180	+	t2.start();
1181	+	waitForQueuedThread(lock, t2);
1182	+	assertTrue(lock.hasQueuedThreads());
1183	+	t1.interrupt();
1184	+	awaitTermination(t1);
1185	+	assertTrue(lock.hasQueuedThreads());
1186	+	lock.writeLock().unlock();
1187	+	awaitTermination(t2);
1188	+	assertFalse(lock.hasQueuedThreads());
1189	+	}
1190	+
1191	+	/**
1192	+	* hasQueuedThread(null) throws NPE
1193	+	*/
1194	+	public void testHasQueuedThreadNPE() {
1195	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1196		try {
1197	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1198	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1199	<	out.writeObject(l);
1200	<	out.close();
1201	<
1202	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1203	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1204	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1205	<	r.readLock().lock();
1206	<	r.readLock().unlock();
1207	<	} catch(Exception e){
1208	<	e.printStackTrace();
1209	<	unexpectedException();
1210	<	}
1197	>	sync.hasQueuedThread(null);
1198	>	shouldThrow();
1199	>	} catch (NullPointerException success) {}
1200	>	}
1201	>
1202	>	/**
1203	>	* hasQueuedThread reports whether a thread is queued.
1204	>	*/
1205	>	public void testHasQueuedThread() throws InterruptedException {
1206	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1207	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1208	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1209	>	assertFalse(lock.hasQueuedThread(t1));
1210	>	assertFalse(lock.hasQueuedThread(t2));
1211	>	lock.writeLock().lock();
1212	>	long startTime = System.nanoTime();
1213	>	t1.start();
1214	>	waitForQueuedThread(lock, t1);
1215	>	assertTrue(lock.hasQueuedThread(t1));
1216	>	assertFalse(lock.hasQueuedThread(t2));
1217	>	t2.start();
1218	>	waitForQueuedThread(lock, t2);
1219	>	assertTrue(lock.hasQueuedThread(t1));
1220	>	assertTrue(lock.hasQueuedThread(t2));
1221	>	t1.interrupt();
1222	>	awaitTermination(t1);
1223	>	assertFalse(lock.hasQueuedThread(t1));
1224	>	assertTrue(lock.hasQueuedThread(t2));
1225	>	lock.writeLock().unlock();
1226	>	awaitTermination(t2);
1227	>	assertFalse(lock.hasQueuedThread(t1));
1228	>	assertFalse(lock.hasQueuedThread(t2));
1229		}
1230
1231		/**
1232		* getQueueLength reports number of waiting threads
1233		*/
1234	<	public void testGetQueueLength() {
1235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1234	>	public void testGetQueueLength() throws InterruptedException {
1235	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1236		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1237		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1238	<	try {
1239	<	assertEquals(0, lock.getQueueLength());
1240	<	lock.writeLock().lock();
1241	<	t1.start();
1242	<	Thread.sleep(SHORT_DELAY_MS);
1243	<	assertEquals(1, lock.getQueueLength());
1244	<	t2.start();
1245	<	Thread.sleep(SHORT_DELAY_MS);
1246	<	assertEquals(2, lock.getQueueLength());
1247	<	t1.interrupt();
1248	<	Thread.sleep(SHORT_DELAY_MS);
1249	<	assertEquals(1, lock.getQueueLength());
1250	<	lock.writeLock().unlock();
1251	<	Thread.sleep(SHORT_DELAY_MS);
1252	<	assertEquals(0, lock.getQueueLength());
1253	<	t1.join();
880	<	t2.join();
881	<	} catch(Exception e){
882	<	unexpectedException();
883	<	}
884	<	}
1238	>	assertEquals(0, lock.getQueueLength());
1239	>	lock.writeLock().lock();
1240	>	long startTime = System.nanoTime();
1241	>	t1.start();
1242	>	waitForQueuedThread(lock, t1);
1243	>	assertEquals(1, lock.getQueueLength());
1244	>	t2.start();
1245	>	waitForQueuedThread(lock, t2);
1246	>	assertEquals(2, lock.getQueueLength());
1247	>	t1.interrupt();
1248	>	awaitTermination(t1);
1249	>	assertEquals(1, lock.getQueueLength());
1250	>	lock.writeLock().unlock();
1251	>	awaitTermination(t2);
1252	>	assertEquals(0, lock.getQueueLength());
1253	>	}
1254
1255		/**
1256		* getQueuedThreads includes waiting threads
1257		*/
1258	<	public void testGetQueuedThreads() {
1259	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1258	>	public void testGetQueuedThreads() throws InterruptedException {
1259	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1260		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262	+	assertTrue(lock.getQueuedThreads().isEmpty());
1263	+	lock.writeLock().lock();
1264	+	long startTime = System.nanoTime();
1265	+	assertTrue(lock.getQueuedThreads().isEmpty());
1266	+	t1.start();
1267	+	waitForQueuedThread(lock, t1);
1268	+	assertEquals(1, lock.getQueuedThreads().size());
1269	+	assertTrue(lock.getQueuedThreads().contains(t1));
1270	+	t2.start();
1271	+	waitForQueuedThread(lock, t2);
1272	+	assertEquals(2, lock.getQueuedThreads().size());
1273	+	assertTrue(lock.getQueuedThreads().contains(t1));
1274	+	assertTrue(lock.getQueuedThreads().contains(t2));
1275	+	t1.interrupt();
1276	+	awaitTermination(t1);
1277	+	assertFalse(lock.getQueuedThreads().contains(t1));
1278	+	assertTrue(lock.getQueuedThreads().contains(t2));
1279	+	assertEquals(1, lock.getQueuedThreads().size());
1280	+	lock.writeLock().unlock();
1281	+	awaitTermination(t2);
1282	+	assertTrue(lock.getQueuedThreads().isEmpty());
1283	+	}
1284	+
1285	+	/**
1286	+	* hasWaiters throws NPE if null
1287	+	*/
1288	+	public void testHasWaitersNPE() {
1289	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1290		try {
1291	<	assertTrue(lock.getQueuedThreads().isEmpty());
1292	<	lock.writeLock().lock();
1293	<	assertTrue(lock.getQueuedThreads().isEmpty());
1294	<	t1.start();
898	<	Thread.sleep(SHORT_DELAY_MS);
899	<	assertTrue(lock.getQueuedThreads().contains(t1));
900	<	t2.start();
901	<	Thread.sleep(SHORT_DELAY_MS);
902	<	assertTrue(lock.getQueuedThreads().contains(t1));
903	<	assertTrue(lock.getQueuedThreads().contains(t2));
904	<	t1.interrupt();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	assertFalse(lock.getQueuedThreads().contains(t1));
907	<	assertTrue(lock.getQueuedThreads().contains(t2));
908	<	lock.writeLock().unlock();
909	<	Thread.sleep(SHORT_DELAY_MS);
910	<	assertTrue(lock.getQueuedThreads().isEmpty());
911	<	t1.join();
912	<	t2.join();
913	<	} catch(Exception e){
914	<	unexpectedException();
915	<	}
916	<	}
1291	>	lock.hasWaiters(null);
1292	>	shouldThrow();
1293	>	} catch (NullPointerException success) {}
1294	>	}
1295
1296		/**
1297	<	* hasWaiters returns true when a thread is waiting, else false
1297	>	* getWaitQueueLength throws NPE if null
1298		*/
1299	<	public void testHasWaiters() {
1300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1301	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1302	<	Thread t = new Thread(new Runnable() {
1303	<	public void run() {
1304	<	try {
1305	<	lock.writeLock().lock();
928	<	threadAssertFalse(c.hasWaiters());
929	<	threadAssertEquals(0, c.getWaitQueueLength());
930	<	c.await();
931	<	lock.writeLock().unlock();
932	<	}
933	<	catch(InterruptedException e) {
934	<	threadUnexpectedException();
935	<	}
936	<	}
937	<	});
1299	>	public void testGetWaitQueueLengthNPE() {
1300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1301	>	try {
1302	>	lock.getWaitQueueLength(null);
1303	>	shouldThrow();
1304	>	} catch (NullPointerException success) {}
1305	>	}
1306
1307	+	/**
1308	+	* getWaitingThreads throws NPE if null
1309	+	*/
1310	+	public void testGetWaitingThreadsNPE() {
1311	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1312		try {
1313	<	t.start();
1314	<	Thread.sleep(SHORT_DELAY_MS);
1315	<	lock.writeLock().lock();
943	<	assertTrue(c.hasWaiters());
944	<	assertEquals(1, c.getWaitQueueLength());
945	<	c.signal();
946	<	lock.writeLock().unlock();
947	<	Thread.sleep(SHORT_DELAY_MS);
948	<	lock.writeLock().lock();
949	<	assertFalse(c.hasWaiters());
950	<	assertEquals(0, c.getWaitQueueLength());
951	<	lock.writeLock().unlock();
952	<	t.join(SHORT_DELAY_MS);
953	<	assertFalse(t.isAlive());
954	<	}
955	<	catch (Exception ex) {
956	<	unexpectedException();
957	<	}
1313	>	lock.getWaitingThreads(null);
1314	>	shouldThrow();
1315	>	} catch (NullPointerException success) {}
1316		}
1317
1318		/**
1319	<	* getWaitQueueLength returns number of waiting threads
1319	>	* hasWaiters throws IAE if not owned
1320		*/
1321	<	public void testGetWaitQueueLength() {
1322	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1323	<	final ReentrantReadWriteLock.WriterConditionObject c = (ReentrantReadWriteLock.WriterConditionObject)(lock.writeLock().newCondition());
1324	<	Thread t1 = new Thread(new Runnable() {
1325	<	public void run() {
1326	<	try {
1327	<	lock.writeLock().lock();
1328	<	threadAssertFalse(c.hasWaiters());
1329	<	threadAssertEquals(0, c.getWaitQueueLength());
972	<	c.await();
973	<	lock.writeLock().unlock();
974	<	}
975	<	catch(InterruptedException e) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	});
980	<
981	<	Thread t2 = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.writeLock().lock();
985	<	threadAssertTrue(c.hasWaiters());
986	<	threadAssertEquals(1, c.getWaitQueueLength());
987	<	c.await();
988	<	lock.writeLock().unlock();
989	<	}
990	<	catch(InterruptedException e) {
991	<	threadUnexpectedException();
992	<	}
993	<	}
994	<	});
1321	>	public void testHasWaitersIAE() {
1322	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1323	>	final Condition c = lock.writeLock().newCondition();
1324	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1325	>	try {
1326	>	lock2.hasWaiters(c);
1327	>	shouldThrow();
1328	>	} catch (IllegalArgumentException success) {}
1329	>	}
1330
1331	+	/**
1332	+	* hasWaiters throws IMSE if not locked
1333	+	*/
1334	+	public void testHasWaitersIMSE() {
1335	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1336	+	final Condition c = lock.writeLock().newCondition();
1337		try {
1338	<	t1.start();
1339	<	Thread.sleep(SHORT_DELAY_MS);
1340	<	t2.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1001	<	lock.writeLock().lock();
1002	<	assertTrue(c.hasWaiters());
1003	<	assertEquals(2, c.getWaitQueueLength());
1004	<	c.signalAll();
1005	<	lock.writeLock().unlock();
1006	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	lock.writeLock().lock();
1008	<	assertFalse(c.hasWaiters());
1009	<	assertEquals(0, c.getWaitQueueLength());
1010	<	lock.writeLock().unlock();
1011	<	t1.join(SHORT_DELAY_MS);
1012	<	t2.join(SHORT_DELAY_MS);
1013	<	assertFalse(t1.isAlive());
1014	<	assertFalse(t2.isAlive());
1015	<	}
1016	<	catch (Exception ex) {
1017	<	unexpectedException();
1018	<	}
1338	>	lock.hasWaiters(c);
1339	>	shouldThrow();
1340	>	} catch (IllegalMonitorStateException success) {}
1341		}
1342
1343		/**
1344	<	* getWaitingThreads returns only and all waiting threads
1344	>	* getWaitQueueLength throws IAE if not owned
1345		*/
1346	<	public void testGetWaitingThreads() {
1347	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1348	<	final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition();
1349	<	Thread t1 = new Thread(new Runnable() {
1350	<	public void run() {
1351	<	try {
1352	<	lock.writeLock().lock();
1353	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
1354	<	c.await();
1033	<	lock.writeLock().unlock();
1034	<	}
1035	<	catch(InterruptedException e) {
1036	<	threadUnexpectedException();
1037	<	}
1038	<	}
1039	<	});
1040	<
1041	<	Thread t2 = new Thread(new Runnable() {
1042	<	public void run() {
1043	<	try {
1044	<	lock.writeLock().lock();
1045	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
1046	<	c.await();
1047	<	lock.writeLock().unlock();
1048	<	}
1049	<	catch(InterruptedException e) {
1050	<	threadUnexpectedException();
1051	<	}
1052	<	}
1053	<	});
1346	>	public void testGetWaitQueueLengthIAE() {
1347	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	>	final Condition c = lock.writeLock().newCondition();
1349	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1350	>	try {
1351	>	lock2.getWaitQueueLength(c);
1352	>	shouldThrow();
1353	>	} catch (IllegalArgumentException success) {}
1354	>	}
1355
1356	+	/**
1357	+	* getWaitQueueLength throws IMSE if not locked
1358	+	*/
1359	+	public void testGetWaitQueueLengthIMSE() {
1360	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1361	+	final Condition c = lock.writeLock().newCondition();
1362		try {
1363	<	lock.writeLock().lock();
1364	<	assertTrue(c.getWaitingThreads().isEmpty());
1365	<	lock.writeLock().unlock();
1366	<	t1.start();
1367	<	Thread.sleep(SHORT_DELAY_MS);
1368	<	t2.start();
1369	<	Thread.sleep(SHORT_DELAY_MS);
1370	<	lock.writeLock().lock();
1371	<	assertTrue(c.hasWaiters());
1372	<	assertTrue(c.getWaitingThreads().contains(t1));
1373	<	assertTrue(c.getWaitingThreads().contains(t2));
1374	<	c.signalAll();
1375	<	lock.writeLock().unlock();
1376	<	Thread.sleep(SHORT_DELAY_MS);
1377	<	lock.writeLock().lock();
1378	<	assertFalse(c.hasWaiters());
1379	<	assertTrue(c.getWaitingThreads().isEmpty());
1380	<	lock.writeLock().unlock();
1381	<	t1.join(SHORT_DELAY_MS);
1382	<	t2.join(SHORT_DELAY_MS);
1383	<	assertFalse(t1.isAlive());
1384	<	assertFalse(t2.isAlive());
1385	<	}
1386	<	catch (Exception ex) {
1387	<	unexpectedException();
1388	<	}
1363	>	lock.getWaitQueueLength(c);
1364	>	shouldThrow();
1365	>	} catch (IllegalMonitorStateException success) {}
1366	>	}
1367	>
1368	>	/**
1369	>	* getWaitingThreads throws IAE if not owned
1370	>	*/
1371	>	public void testGetWaitingThreadsIAE() {
1372	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1373	>	final Condition c = lock.writeLock().newCondition();
1374	>	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1375	>	try {
1376	>	lock2.getWaitingThreads(c);
1377	>	shouldThrow();
1378	>	} catch (IllegalArgumentException success) {}
1379	>	}
1380	>
1381	>	/**
1382	>	* getWaitingThreads throws IMSE if not locked
1383	>	*/
1384	>	public void testGetWaitingThreadsIMSE() {
1385	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1386	>	final Condition c = lock.writeLock().newCondition();
1387	>	try {
1388	>	lock.getWaitingThreads(c);
1389	>	shouldThrow();
1390	>	} catch (IllegalMonitorStateException success) {}
1391	>	}
1392	>
1393	>	/**
1394	>	* hasWaiters returns true when a thread is waiting, else false
1395	>	*/
1396	>	public void testHasWaiters() throws InterruptedException {
1397	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1398	>	final Condition c = lock.writeLock().newCondition();
1399	>	final CountDownLatch locked = new CountDownLatch(1);
1400	>	Thread t = newStartedThread(new CheckedRunnable() {
1401	>	public void realRun() throws InterruptedException {
1402	>	lock.writeLock().lock();
1403	>	assertFalse(lock.hasWaiters(c));
1404	>	locked.countDown();
1405	>	assertEquals(0, lock.getWaitQueueLength(c));
1406	>	c.await();
1407	>	lock.writeLock().unlock();
1408	>	}});
1409	>
1410	>	locked.await();
1411	>	lock.writeLock().lock();
1412	>	assertTrue(lock.hasWaiters(c));
1413	>	assertEquals(1, lock.getWaitQueueLength(c));
1414	>	c.signal();
1415	>	assertHasNoWaiters(lock, c);
1416	>	lock.writeLock().unlock();
1417	>	awaitTermination(t);
1418	>	assertHasNoWaiters(lock, c);
1419	>	}
1420	>
1421	>	/**
1422	>	* getWaitQueueLength returns number of waiting threads
1423	>	*/
1424	>	public void testGetWaitQueueLength() throws InterruptedException {
1425	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1426	>	final Condition c = lock.writeLock().newCondition();
1427	>	final CountDownLatch locked = new CountDownLatch(1);
1428	>	Thread t = newStartedThread(new CheckedRunnable() {
1429	>	public void realRun() throws InterruptedException {
1430	>	lock.writeLock().lock();
1431	>	assertEquals(0, lock.getWaitQueueLength(c));
1432	>	locked.countDown();
1433	>	c.await();
1434	>	lock.writeLock().unlock();
1435	>	}});
1436	>
1437	>	locked.await();
1438	>	lock.writeLock().lock();
1439	>	assertHasWaiters(lock, c, t);
1440	>	assertEquals(1, lock.getWaitQueueLength(c));
1441	>	c.signal();
1442	>	assertHasNoWaiters(lock, c);
1443	>	assertEquals(0, lock.getWaitQueueLength(c));
1444	>	lock.writeLock().unlock();
1445	>	awaitTermination(t);
1446	>	}
1447	>
1448	>	/**
1449	>	* getWaitingThreads returns only and all waiting threads
1450	>	*/
1451	>	public void testGetWaitingThreads() throws InterruptedException {
1452	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1453	>	final Condition c = lock.writeLock().newCondition();
1454	>	final CountDownLatch locked1 = new CountDownLatch(1);
1455	>	final CountDownLatch locked2 = new CountDownLatch(1);
1456	>	Thread t1 = new Thread(new CheckedRunnable() {
1457	>	public void realRun() throws InterruptedException {
1458	>	lock.writeLock().lock();
1459	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1460	>	locked1.countDown();
1461	>	c.await();
1462	>	lock.writeLock().unlock();
1463	>	}});
1464	>
1465	>	Thread t2 = new Thread(new CheckedRunnable() {
1466	>	public void realRun() throws InterruptedException {
1467	>	lock.writeLock().lock();
1468	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1469	>	locked2.countDown();
1470	>	c.await();
1471	>	lock.writeLock().unlock();
1472	>	}});
1473	>
1474	>	lock.writeLock().lock();
1475	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1476	>	lock.writeLock().unlock();
1477	>
1478	>	t1.start();
1479	>	locked1.await();
1480	>	t2.start();
1481	>	locked2.await();
1482	>
1483	>	lock.writeLock().lock();
1484	>	assertTrue(lock.hasWaiters(c));
1485	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1486	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1487	>	assertEquals(2, lock.getWaitingThreads(c).size());
1488	>	c.signalAll();
1489	>	assertHasNoWaiters(lock, c);
1490	>	lock.writeLock().unlock();
1491	>
1492	>	awaitTermination(t1);
1493	>	awaitTermination(t2);
1494	>
1495	>	assertHasNoWaiters(lock, c);
1496	>	}
1497	>
1498	>	/**
1499	>	* toString indicates current lock state
1500	>	*/
1501	>	public void testToString() {
1502	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1503	>	String us = lock.toString();
1504	>	assertTrue(us.indexOf("Write locks = 0") >= 0);
1505	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1506	>	lock.writeLock().lock();
1507	>	String ws = lock.toString();
1508	>	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1509	>	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1510	>	lock.writeLock().unlock();
1511	>	lock.readLock().lock();
1512	>	lock.readLock().lock();
1513	>	String rs = lock.toString();
1514	>	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1515	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1516	>	}
1517	>
1518	>	/**
1519	>	* readLock.toString indicates current lock state
1520	>	*/
1521	>	public void testReadLockToString() {
1522	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1523	>	String us = lock.readLock().toString();
1524	>	assertTrue(us.indexOf("Read locks = 0") >= 0);
1525	>	lock.readLock().lock();
1526	>	lock.readLock().lock();
1527	>	String rs = lock.readLock().toString();
1528	>	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1529	>	}
1530	>
1531	>	/**
1532	>	* writeLock.toString indicates current lock state
1533	>	*/
1534	>	public void testWriteLockToString() {
1535	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1536	>	String us = lock.writeLock().toString();
1537	>	assertTrue(us.indexOf("Unlocked") >= 0);
1538	>	lock.writeLock().lock();
1539	>	String ls = lock.writeLock().toString();
1540	>	assertTrue(ls.indexOf("Locked") >= 0);
1541		}
1542
1543		}

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