ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.17 by dl, Thu Jan 8 01:29:46 2004 UTC vs.
Revision 1.58 by jsr166, Sat May 7 14:43:13 2011 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.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 {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.writeLock().lockInterruptibly();
33		}
34		}
35
36	–
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 {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.writeLock().lockInterruptibly();
45		}
46		}
47
#	Line 54 | 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 Collection<Thread> getWaitingThreads(Condition c) {
58	<	return super.getWaitingThreads(c);
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>	}
64	>
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67	>	*/
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	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
78	>	*/
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	+	* Checks that lock is write-locked by the given thread.
103	+	*/
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	+	* Checks that condition c has no waiters.
118	+	*/
119	+	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
120	+	assertHasWaiters(lock, c, new Thread[] {});
121	+	}
122	+
123	+	/**
124	+	* Checks that condition c has exactly the given waiter threads.
125	+	*/
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	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
143	<	assertFalse(rl.isFair());
144	<	assertFalse(rl.isWriteLocked());
145	<	assertEquals(0, rl.getReadLockCount());
146	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
147	<	assertTrue(r2.isFair());
148	<	assertFalse(r2.isWriteLocked());
149	<	assertEquals(0, r2.getReadLockCount());
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-locking and read-locking an unlocked lock succeed
162		*/
163	<	public void testLock() {
164	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
165	<	rl.writeLock().lock();
166	<	assertTrue(rl.isWriteLocked());
167	<	assertTrue(rl.isWriteLockedByCurrentThread());
168	<	assertEquals(0, rl.getReadLockCount());
169	<	rl.writeLock().unlock();
170	<	assertFalse(rl.isWriteLocked());
171	<	assertFalse(rl.isWriteLockedByCurrentThread());
172	<	assertEquals(0, rl.getReadLockCount());
173	<	rl.readLock().lock();
174	<	assertFalse(rl.isWriteLocked());
175	<	assertFalse(rl.isWriteLockedByCurrentThread());
176	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	assertEquals(0, rl.getReadLockCount());
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
102	–
179		/**
180		* locking an unlocked fair lock succeeds
181		*/
182	<	public void testFairLock() {
183	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
184	<	rl.writeLock().lock();
185	<	assertTrue(rl.isWriteLocked());
186	<	assertTrue(rl.isWriteLockedByCurrentThread());
187	<	assertEquals(0, rl.getReadLockCount());
188	<	rl.writeLock().unlock();
189	<	assertFalse(rl.isWriteLocked());
190	<	assertFalse(rl.isWriteLockedByCurrentThread());
191	<	assertEquals(0, rl.getReadLockCount());
192	<	rl.readLock().lock();
193	<	assertFalse(rl.isWriteLocked());
194	<	assertFalse(rl.isWriteLockedByCurrentThread());
195	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
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		* getWriteHoldCount returns number of recursive holds
200		*/
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	+	assertEquals(i-1,lock.getWriteHoldCount());
210	+	}
211	+	}
212	+
213	+	/**
214	+	* WriteLock.getHoldCount returns number of recursive holds
215	+	*/
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.getWriteHoldCount());
221	<	}
222	<	for(int i = SIZE; i > 0; i--) {
223	<	lock.writeLock().unlock();
224	<	assertEquals(i-1,lock.getWriteHoldCount());
225	<	}
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	>
228	>	/**
229	>	* getReadHoldCount returns number of recursive holds
230	>	*/
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		}
140	–
242
243		/**
244		* write-unlocking an unlocked lock throws IllegalMonitorStateException
245		*/
246	<	public void testUnlock_IllegalMonitorStateException() {
247	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
248	<	try {
249	<	rl.writeLock().unlock();
250	<	shouldThrow();
251	<	} catch(IllegalMonitorStateException success){}
246	>	public void testWriteUnlock_IllegalMonitorStateException() {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
248	>	try {
249	>	lock.writeLock().unlock();
250	>	shouldThrow();
251	>	} catch (IllegalMonitorStateException success) {}
252		}
253
254	+	/**
255	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
256	+	*/
257	+	public void testReadUnlock_IllegalMonitorStateException() {
258	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
259	+	try {
260	+	lock.readLock().unlock();
261	+	shouldThrow();
262	+	} catch (IllegalMonitorStateException success) {}
263	+	}
264
265		/**
266		* write-lockInterruptibly is interruptible
267		*/
268	<	public void testWriteLockInterruptibly_Interrupted() {
269	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
270	<	Thread t = new Thread(new Runnable() {
271	<	public void run() {
272	<	try {
273	<	lock.writeLock().lockInterruptibly();
274	<	lock.writeLock().unlock();
275	<	lock.writeLock().lockInterruptibly();
276	<	lock.writeLock().unlock();
277	<	} catch(InterruptedException success){}
278	<	}
279	<	});
280	<	try {
170	<	lock.writeLock().lock();
171	<	t.start();
172	<	t.interrupt();
173	<	lock.writeLock().unlock();
174	<	t.join();
175	<	} catch(Exception e){
176	<	unexpectedException();
177	<	}
178	<	}
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	>	waitForQueuedThread(lock, t);
277	>	t.interrupt();
278	>	awaitTermination(t);
279	>	releaseWriteLock(lock);
280	>	}
281
282		/**
283		* timed write-tryLock is interruptible
284		*/
285	<	public void testWriteTryLock_Interrupted() {
286	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
287	<	lock.writeLock().lock();
288	<	Thread t = new Thread(new Runnable() {
289	<	public void run() {
290	<	try {
291	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
292	<	} catch(InterruptedException success){}
293	<	}
294	<	});
295	<	try {
296	<	t.start();
195	<	t.interrupt();
196	<	lock.writeLock().unlock();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
200	<	}
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-lockInterruptibly is interruptible
301		*/
302	<	public void testReadLockInterruptibly_Interrupted() {
303	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
304	<	lock.writeLock().lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	try {
308	<	lock.readLock().lockInterruptibly();
309	<	} catch(InterruptedException success){}
310	<	}
311	<	});
312	<	try {
313	<	t.start();
314	<	t.interrupt();
219	<	lock.writeLock().unlock();
220	<	t.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
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	>	waitForQueuedThread(lock, t);
311	>	t.interrupt();
312	>	awaitTermination(t);
313	>	releaseWriteLock(lock);
314	>	}
315
316		/**
317		* timed read-tryLock is interruptible
318		*/
319	<	public void testReadTryLock_Interrupted() {
320	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
321	<	lock.writeLock().lock();
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	try {
325	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
326	<	threadShouldThrow();
327	<	} catch(InterruptedException success){}
328	<	}
329	<	});
330	<	try {
241	<	t.start();
242	<	t.interrupt();
243	<	t.join();
244	<	} catch(Exception e){
245	<	unexpectedException();
246	<	}
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	>	waitForQueuedThread(lock, t);
328	>	t.interrupt();
329	>	awaitTermination(t);
330	>	releaseWriteLock(lock);
331		}
332
249	–
333		/**
334		* write-tryLock fails if locked
335		*/
336	<	public void testWriteTryLockWhenLocked() {
337	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
338	<	lock.writeLock().lock();
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	threadAssertFalse(lock.writeLock().tryLock());
342	<	}
343	<	});
344	<	try {
345	<	t.start();
346	<	t.join();
264	<	lock.writeLock().unlock();
265	<	} catch(Exception e){
266	<	unexpectedException();
267	<	}
268	<	}
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-tryLock fails if locked
350		*/
351	<	public void testReadTryLockWhenLocked() {
352	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
353	<	lock.writeLock().lock();
354	<	Thread t = new Thread(new Runnable() {
355	<	public void run() {
356	<	threadAssertFalse(lock.readLock().tryLock());
357	<	}
358	<	});
359	<	try {
360	<	t.start();
361	<	t.join();
284	<	lock.writeLock().unlock();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
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() {
367	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
368	<	lock.readLock().lock();
369	<	Thread t = new Thread(new Runnable() {
370	<	public void run() {
371	<	threadAssertTrue(lock.readLock().tryLock());
372	<	lock.readLock().unlock();
373	<	}
374	<	});
375	<	try {
376	<	t.start();
377	<	t.join();
378	<	lock.readLock().unlock();
379	<	} catch(Exception e){
380	<	unexpectedException();
381	<	}
382	<	}
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	<	* A writelock succeeds after reading threads unlock
708	>	* Read tryLock succeeds if readlocked but not writelocked
709		*/
710	<	public void testWriteAfterMultipleReadLocks() {
711	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712	<	lock.readLock().lock();
713	<	Thread t1 = new Thread(new Runnable() {
714	<	public void run() {
715	<	lock.readLock().lock();
716	<	lock.readLock().unlock();
717	<	}
322	<	});
323	<	Thread t2 = new Thread(new Runnable() {
324	<	public void run() {
325	<	lock.writeLock().lock();
326	<	lock.writeLock().unlock();
327	<	}
328	<	});
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	<	try {
720	<	t1.start();
721	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	lock.readLock().unlock();
335	<	t1.join(MEDIUM_DELAY_MS);
336	<	t2.join(MEDIUM_DELAY_MS);
337	<	assertTrue(!t1.isAlive());
338	<	assertTrue(!t2.isAlive());
339	<
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	}
719	>	awaitTermination(t);
720	>	lock.readLock().unlock();
721	>	}
722
723		/**
724	<	* Readlocks succeed after a writing thread unlocks
724	>	* write tryLock fails when readlocked
725		*/
726	<	public void testReadAfterWriteLock() {
727	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
728	<	lock.writeLock().lock();
729	<	Thread t1 = new Thread(new Runnable() {
730	<	public void run() {
731	<	lock.readLock().lock();
732	<	lock.readLock().unlock();
355	<	}
356	<	});
357	<	Thread t2 = new Thread(new Runnable() {
358	<	public void run() {
359	<	lock.readLock().lock();
360	<	lock.readLock().unlock();
361	<	}
362	<	});
363	<
364	<	try {
365	<	t1.start();
366	<	t2.start();
367	<	Thread.sleep(SHORT_DELAY_MS);
368	<	lock.writeLock().unlock();
369	<	t1.join(MEDIUM_DELAY_MS);
370	<	t2.join(MEDIUM_DELAY_MS);
371	<	assertTrue(!t1.isAlive());
372	<	assertTrue(!t2.isAlive());
373	<
374	<	} catch(Exception e){
375	<	unexpectedException();
376	<	}
377	<	}
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	<	* Read tryLock succeeds if readlocked but not writelocked
739	>	* Fair Read tryLock succeeds if readlocked but not writelocked
740		*/
741	<	public void testTryLockWhenReadLocked() {
742	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
743	<	lock.readLock().lock();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	threadAssertTrue(lock.readLock().tryLock());
747	<	lock.readLock().unlock();
748	<	}
391	<	});
392	<	try {
393	<	t.start();
394	<	t.join();
395	<	lock.readLock().unlock();
396	<	} catch(Exception e){
397	<	unexpectedException();
398	<	}
399	<	}
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	<
750	>	awaitTermination(t);
751	>	lock.readLock().unlock();
752	>	}
753
754		/**
755	<	* write tryLock fails when readlocked
755	>	* Fair write tryLock fails when readlocked
756		*/
757	<	public void testWriteTryLockWhenReadLocked() {
758	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	<	lock.readLock().lock();
760	<	Thread t = new Thread(new Runnable() {
761	<	public void run() {
762	<	threadAssertFalse(lock.writeLock().tryLock());
763	<	}
413	<	});
414	<	try {
415	<	t.start();
416	<	t.join();
417	<	lock.readLock().unlock();
418	<	} catch(Exception e){
419	<	unexpectedException();
420	<	}
421	<	}
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	<
765	>	awaitTermination(t);
766	>	lock.readLock().unlock();
767	>	}
768
769		/**
770		* write timed tryLock times out if locked
771		*/
772	<	public void testWriteTryLock_Timeout() {
773	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
774	<	lock.writeLock().lock();
775	<	Thread t = new Thread(new Runnable() {
776	<	public void run() {
777	<	try {
778	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
779	<	} catch (Exception ex) {
780	<	threadUnexpectedException();
781	<	}
782	<	}
783	<	});
440	<	try {
441	<	t.start();
442	<	t.join();
443	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
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() {
789	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
790	<	lock.writeLock().lock();
791	<	Thread t = new Thread(new Runnable() {
792	<	public void run() {
793	<	try {
794	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
795	<	} catch (Exception ex) {
796	<	threadUnexpectedException();
797	<	}
798	<	}
799	<	});
464	<	try {
465	<	t.start();
466	<	t.join();
467	<	lock.writeLock().unlock();
468	<	} catch(Exception e){
469	<	unexpectedException();
470	<	}
471	<	}
472	<
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();
489	<	}
490	<	catch(InterruptedException success) {
491	<	}
492	<	}
493	<	});
494	<	try {
495	<	t.start();
496	<	t.interrupt();
497	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
501	<	}
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();
519	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
524	<	try {
525	<	t.start();
526	<	t.interrupt();
527	<	t.join();
528	<	lock.writeLock().unlock();
529	<	} catch(Exception e){
530	<	unexpectedException();
531	<	}
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	<	}
546	<	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	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
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);
578	<	lock.writeLock().unlock();
579	<	}
580	<	catch (Exception ex) {
581	<	unexpectedException();
582	<	}
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) {
598	<	unexpectedException();
599	<	}
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)));
612	<	lock.writeLock().unlock();
613	<	}
614	<	catch (Exception ex) {
615	<	unexpectedException();
616	<	}
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();
640	<	Thread.sleep(SHORT_DELAY_MS);
641	<	lock.writeLock().lock();
642	<	c.signal();
643	<	lock.writeLock().unlock();
644	<	t.join(SHORT_DELAY_MS);
645	<	assertFalse(t.isAlive());
646	<	}
647	<	catch (Exception ex) {
648	<	unexpectedException();
649	<	}
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();
679	<	}
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();
710	<	}
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();
741	<	}
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();
773	<	}
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	<	try {
1156	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1157	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1158	<	out.writeObject(l);
1159	<	out.close();
1160	<
1161	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1162	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1163	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1164	<	r.readLock().lock();
843	<	r.readLock().unlock();
844	<	} catch(Exception e){
845	<	e.printStackTrace();
846	<	unexpectedException();
847	<	}
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() {
1171	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	<	assertFalse(lock.hasQueuedThreads());
1198	<	lock.writeLock().lock();
1199	<	t1.start();
1200	<	Thread.sleep(SHORT_DELAY_MS);
1201	<	assertTrue(lock.hasQueuedThreads());
1202	<	t2.start();
1203	<	Thread.sleep(SHORT_DELAY_MS);
1204	<	assertTrue(lock.hasQueuedThreads());
1205	<	t1.interrupt();
1206	<	Thread.sleep(SHORT_DELAY_MS);
1207	<	assertTrue(lock.hasQueuedThreads());
1208	<	lock.writeLock().unlock();
1209	<	Thread.sleep(SHORT_DELAY_MS);
1210	<	assertFalse(lock.hasQueuedThreads());
1211	<	t1.join();
1212	<	t2.join();
1213	<	} catch(Exception e){
1214	<	unexpectedException();
1215	<	}
1216	<	}
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();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
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	<	try {
1263	<	assertTrue(lock.getQueuedThreads().isEmpty());
1264	<	lock.writeLock().lock();
1265	<	assertTrue(lock.getQueuedThreads().isEmpty());
1266	<	t1.start();
1267	<	Thread.sleep(SHORT_DELAY_MS);
1268	<	assertTrue(lock.getQueuedThreads().contains(t1));
1269	<	t2.start();
1270	<	Thread.sleep(SHORT_DELAY_MS);
1271	<	assertTrue(lock.getQueuedThreads().contains(t1));
1272	<	assertTrue(lock.getQueuedThreads().contains(t2));
1273	<	t1.interrupt();
1274	<	Thread.sleep(SHORT_DELAY_MS);
1275	<	assertFalse(lock.getQueuedThreads().contains(t1));
1276	<	assertTrue(lock.getQueuedThreads().contains(t2));
1277	<	lock.writeLock().unlock();
1278	<	Thread.sleep(SHORT_DELAY_MS);
1279	<	assertTrue(lock.getQueuedThreads().isEmpty());
1280	<	t1.join();
1281	<	t2.join();
1282	<	} catch(Exception e){
1283	<	unexpectedException();
937	<	}
938	<	}
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();
1289	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1290		try {
1291		lock.hasWaiters(null);
1292		shouldThrow();
1293	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1293	>	} catch (NullPointerException success) {}
1294		}
1295
1296		/**
1297		* getWaitQueueLength throws NPE if null
1298		*/
1299		public void testGetWaitQueueLengthNPE() {
1300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1301		try {
1302		lock.getWaitQueueLength(null);
1303		shouldThrow();
1304	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1304	>	} catch (NullPointerException success) {}
1305		}
1306
968	–
1307		/**
1308		* getWaitingThreads throws NPE if null
1309		*/
1310		public void testGetWaitingThreadsNPE() {
1311	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1311	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1312		try {
1313		lock.getWaitingThreads(null);
1314		shouldThrow();
1315	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1315	>	} catch (NullPointerException success) {}
1316		}
1317
1318		/**
1319		* hasWaiters throws IAE if not owned
1320		*/
1321		public void testHasWaitersIAE() {
1322	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1323	<	final Condition c = (lock.writeLock().newCondition());
1324	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
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) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
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());
1335	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1336	>	final Condition c = lock.writeLock().newCondition();
1337		try {
1338		lock.hasWaiters(c);
1339		shouldThrow();
1340	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1340	>	} catch (IllegalMonitorStateException success) {}
1341		}
1342
1014	–
1343		/**
1344		* getWaitQueueLength throws IAE if not owned
1345		*/
1346		public void testGetWaitQueueLengthIAE() {
1347	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1348	<	final Condition c = (lock.writeLock().newCondition());
1349	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
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) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
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());
1360	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1361	>	final Condition c = lock.writeLock().newCondition();
1362		try {
1363		lock.getWaitQueueLength(c);
1364		shouldThrow();
1365	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1365	>	} catch (IllegalMonitorStateException success) {}
1366		}
1367
1046	–
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();
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) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
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());
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) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1390	>	} catch (IllegalMonitorStateException success) {}
1391		}
1392
1078	–
1393		/**
1394		* hasWaiters returns true when a thread is waiting, else false
1395		*/
1396	<	public void testHasWaiters() {
1397	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1398	<	final Condition c = (lock.writeLock().newCondition());
1399	<	Thread t = new Thread(new Runnable() {
1400	<	public void run() {
1401	<	try {
1402	<	lock.writeLock().lock();
1403	<	threadAssertFalse(lock.hasWaiters(c));
1404	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1405	<	c.await();
1406	<	lock.writeLock().unlock();
1407	<	}
1408	<	catch(InterruptedException e) {
1409	<	threadUnexpectedException();
1410	<	}
1411	<	}
1412	<	});
1413	<
1414	<	try {
1415	<	t.start();
1416	<	Thread.sleep(SHORT_DELAY_MS);
1417	<	lock.writeLock().lock();
1418	<	assertTrue(lock.hasWaiters(c));
1105	<	assertEquals(1, lock.getWaitQueueLength(c));
1106	<	c.signal();
1107	<	lock.writeLock().unlock();
1108	<	Thread.sleep(SHORT_DELAY_MS);
1109	<	lock.writeLock().lock();
1110	<	assertFalse(lock.hasWaiters(c));
1111	<	assertEquals(0, lock.getWaitQueueLength(c));
1112	<	lock.writeLock().unlock();
1113	<	t.join(SHORT_DELAY_MS);
1114	<	assertFalse(t.isAlive());
1115	<	}
1116	<	catch (Exception ex) {
1117	<	unexpectedException();
1118	<	}
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() {
1425	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1426	<	final Condition c = (lock.writeLock().newCondition());
1427	<	Thread t = new Thread(new Runnable() {
1428	<	public void run() {
1429	<	try {
1430	<	lock.writeLock().lock();
1431	<	threadAssertFalse(lock.hasWaiters(c));
1432	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1433	<	c.await();
1434	<	lock.writeLock().unlock();
1435	<	}
1436	<	catch(InterruptedException e) {
1437	<	threadUnexpectedException();
1438	<	}
1439	<	}
1440	<	});
1441	<
1442	<	try {
1443	<	t.start();
1444	<	Thread.sleep(SHORT_DELAY_MS);
1445	<	lock.writeLock().lock();
1146	<	assertTrue(lock.hasWaiters(c));
1147	<	assertEquals(1, lock.getWaitQueueLength(c));
1148	<	c.signal();
1149	<	lock.writeLock().unlock();
1150	<	Thread.sleep(SHORT_DELAY_MS);
1151	<	lock.writeLock().lock();
1152	<	assertFalse(lock.hasWaiters(c));
1153	<	assertEquals(0, lock.getWaitQueueLength(c));
1154	<	lock.writeLock().unlock();
1155	<	t.join(SHORT_DELAY_MS);
1156	<	assertFalse(t.isAlive());
1157	<	}
1158	<	catch (Exception ex) {
1159	<	unexpectedException();
1160	<	}
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
1163	–
1448		/**
1449		* getWaitingThreads returns only and all waiting threads
1450		*/
1451	<	public void testGetWaitingThreads() {
1452	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1451	>	public void testGetWaitingThreads() throws InterruptedException {
1452	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1453		final Condition c = lock.writeLock().newCondition();
1454	<	Thread t1 = new Thread(new Runnable() {
1455	<	public void run() {
1456	<	try {
1457	<	lock.writeLock().lock();
1458	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1459	<	c.await();
1460	<	lock.writeLock().unlock();
1461	<	}
1462	<	catch(InterruptedException e) {
1463	<	threadUnexpectedException();
1464	<	}
1465	<	}
1466	<	});
1467	<
1468	<	Thread t2 = new Thread(new Runnable() {
1469	<	public void run() {
1470	<	try {
1471	<	lock.writeLock().lock();
1472	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1473	<	c.await();
1474	<	lock.writeLock().unlock();
1475	<	}
1476	<	catch(InterruptedException e) {
1477	<	threadUnexpectedException();
1478	<	}
1479	<	}
1480	<	});
1481	<
1482	<	try {
1483	<	lock.writeLock().lock();
1484	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1485	<	lock.writeLock().unlock();
1486	<	t1.start();
1487	<	Thread.sleep(SHORT_DELAY_MS);
1488	<	t2.start();
1489	<	Thread.sleep(SHORT_DELAY_MS);
1490	<	lock.writeLock().lock();
1491	<	assertTrue(lock.hasWaiters(c));
1492	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1493	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1494	<	c.signalAll();
1495	<	lock.writeLock().unlock();
1496	<	Thread.sleep(SHORT_DELAY_MS);
1497	<	lock.writeLock().lock();
1498	<	assertFalse(lock.hasWaiters(c));
1499	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1500	<	lock.writeLock().unlock();
1501	<	t1.join(SHORT_DELAY_MS);
1502	<	t2.join(SHORT_DELAY_MS);
1503	<	assertFalse(t1.isAlive());
1504	<	assertFalse(t2.isAlive());
1505	<	}
1506	<	catch (Exception ex) {
1507	<	unexpectedException();
1508	<	}
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		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines