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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.47 by jsr166, Mon May 2 00:04:49 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.locks.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14	+	import java.util.*;
15
16		public class ReentrantReadWriteLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(ReentrantReadWriteLockTest.class);
21	>	return new TestSuite(ReentrantReadWriteLockTest.class);
22		}
23
24	+	/**
25	+	* A runnable calling lockInterruptibly
26	+	*/
27	+	class InterruptibleLockRunnable extends CheckedRunnable {
28	+	final ReentrantReadWriteLock lock;
29	+	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
30	+	public void realRun() throws InterruptedException {
31	+	lock.writeLock().lockInterruptibly();
32	+	}
33	+	}
34	+
35	+
36	+	/**
37	+	* A runnable calling lockInterruptibly that expects to be
38	+	* interrupted
39	+	*/
40	+	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	+	final ReentrantReadWriteLock lock;
42	+	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
43	+	public void realRun() throws InterruptedException {
44	+	lock.writeLock().lockInterruptibly();
45	+	}
46	+	}
47
48	<	/*
48	>	/**
49	>	* Subclass to expose protected methods
50	>	*/
51	>	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
52	>	PublicReentrantReadWriteLock() { super(); }
53	>	public Collection<Thread> getQueuedThreads() {
54	>	return super.getQueuedThreads();
55	>	}
56	>	public Collection<Thread> getWaitingThreads(Condition c) {
57	>	return super.getWaitingThreads(c);
58	>	}
59	>	}
60	>
61	>	/**
62	>	* Releases lock, checking that it had a hold count of 1.
63	>	*/
64	>	void releaseLock(ReentrantReadWriteLock.WriteLock lock) {
65	>	assertTrue(lock.isHeldByCurrentThread());
66	>	lock.unlock();
67	>	assertFalse(lock.isHeldByCurrentThread());
68	>	}
69	>
70	>	/**
71	>	* Constructor sets given fairness, and is in unlocked state
72	>	*/
73	>	public void testConstructor() {
74	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
75	>	assertFalse(rl.isFair());
76	>	assertFalse(rl.isWriteLocked());
77	>	assertEquals(0, rl.getReadLockCount());
78	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
79	>	assertTrue(r2.isFair());
80	>	assertFalse(r2.isWriteLocked());
81	>	assertEquals(0, r2.getReadLockCount());
82	>	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
83	>	assertFalse(r3.isFair());
84	>	assertFalse(r3.isWriteLocked());
85	>	assertEquals(0, r3.getReadLockCount());
86	>	}
87	>
88	>	/**
89		* write-locking and read-locking an unlocked lock succeed
90		*/
91	<	public void testLock() {
92	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
91	>	public void testLock() {
92	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
93		rl.writeLock().lock();
94	+	assertTrue(rl.isWriteLocked());
95	+	assertTrue(rl.isWriteLockedByCurrentThread());
96	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
97	+	assertEquals(0, rl.getReadLockCount());
98		rl.writeLock().unlock();
99	+	assertFalse(rl.isWriteLocked());
100	+	assertFalse(rl.isWriteLockedByCurrentThread());
101	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
102	+	assertEquals(0, rl.getReadLockCount());
103		rl.readLock().lock();
104	+	assertFalse(rl.isWriteLocked());
105	+	assertFalse(rl.isWriteLockedByCurrentThread());
106	+	assertEquals(1, rl.getReadLockCount());
107		rl.readLock().unlock();
108	+	assertFalse(rl.isWriteLocked());
109	+	assertFalse(rl.isWriteLockedByCurrentThread());
110	+	assertEquals(0, rl.getReadLockCount());
111		}
112
113
114	<	/*
114	>	/**
115		* locking an unlocked fair lock succeeds
116		*/
117	<	public void testFairLock() {
118	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
117	>	public void testFairLock() {
118	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
119		rl.writeLock().lock();
120	+	assertTrue(rl.isWriteLocked());
121	+	assertTrue(rl.isWriteLockedByCurrentThread());
122	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
123	+	assertEquals(0, rl.getReadLockCount());
124		rl.writeLock().unlock();
125	+	assertFalse(rl.isWriteLocked());
126	+	assertFalse(rl.isWriteLockedByCurrentThread());
127	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
128	+	assertEquals(0, rl.getReadLockCount());
129		rl.readLock().lock();
130	+	assertFalse(rl.isWriteLocked());
131	+	assertFalse(rl.isWriteLockedByCurrentThread());
132	+	assertEquals(1, rl.getReadLockCount());
133		rl.readLock().unlock();
134	+	assertFalse(rl.isWriteLocked());
135	+	assertFalse(rl.isWriteLockedByCurrentThread());
136	+	assertEquals(0, rl.getReadLockCount());
137		}
138
139		/**
140	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
140	>	* getWriteHoldCount returns number of recursive holds
141		*/
142	<	public void testUnlock_IllegalMonitorStateException() {
143	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
144	<	try {
145	<	rl.writeLock().unlock();
146	<	shouldThrow();
147	<	} catch(IllegalMonitorStateException success){}
142	>	public void testGetWriteHoldCount() {
143	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
144	>	for (int i = 1; i <= SIZE; i++) {
145	>	lock.writeLock().lock();
146	>	assertEquals(i,lock.getWriteHoldCount());
147	>	}
148	>	for (int i = SIZE; i > 0; i--) {
149	>	lock.writeLock().unlock();
150	>	assertEquals(i-1,lock.getWriteHoldCount());
151	>	}
152		}
153
56	–
154		/**
155	<	* write-lockInterruptibly is interruptible
155	>	* WriteLock.getHoldCount returns number of recursive holds
156		*/
157	<	public void testWriteLockInterruptibly_Interrupted() {
158	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	<	lock.writeLock().lock();
160	<	Thread t = new Thread(new Runnable() {
161	<	public void run() {
162	<	try {
163	<	lock.writeLock().lockInterruptibly();
67	<	threadShouldThrow();
68	<	} catch(InterruptedException success){}
69	<	}
70	<	});
71	<	try {
72	<	t.start();
73	<	t.interrupt();
74	<	lock.writeLock().unlock();
75	<	t.join();
76	<	} catch(Exception e){
77	<	unexpectedException();
78	<	}
79	<	}
80	<
81	<	/**
82	<	* timed write-trylock is interruptible
83	<	*/
84	<	public void testWriteTryLock_Interrupted() {
85	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
86	<	lock.writeLock().lock();
87	<	Thread t = new Thread(new Runnable() {
88	<	public void run() {
89	<	try {
90	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
91	<	threadShouldThrow();
92	<	} catch(InterruptedException success){}
93	<	}
94	<	});
95	<	try {
96	<	t.start();
97	<	t.interrupt();
157	>	public void testGetHoldCount() {
158	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	>	for (int i = 1; i <= SIZE; i++) {
160	>	lock.writeLock().lock();
161	>	assertEquals(i,lock.writeLock().getHoldCount());
162	>	}
163	>	for (int i = SIZE; i > 0; i--) {
164		lock.writeLock().unlock();
165	<	t.join();
100	<	} catch(Exception e){
101	<	unexpectedException();
165	>	assertEquals(i-1,lock.writeLock().getHoldCount());
166		}
167		}
168
169		/**
170	<	* read-lockInterruptibly is interruptible
170	>	* getReadHoldCount returns number of recursive holds
171		*/
172	<	public void testReadLockInterruptibly_Interrupted() {
173	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	<	lock.writeLock().lock();
175	<	Thread t = new Thread(new Runnable() {
176	<	public void run() {
177	<	try {
178	<	lock.readLock().lockInterruptibly();
179	<	threadShouldThrow();
180	<	} catch(InterruptedException success){}
117	<	}
118	<	});
119	<	try {
120	<	t.start();
121	<	t.interrupt();
122	<	lock.writeLock().unlock();
123	<	t.join();
124	<	} catch(Exception e){
125	<	unexpectedException();
126	<	}
127	<	}
128	<
129	<	/**
130	<	* timed read-trylock is interruptible
131	<	*/
132	<	public void testReadTryLock_Interrupted() {
133	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
134	<	lock.writeLock().lock();
135	<	Thread t = new Thread(new Runnable() {
136	<	public void run() {
137	<	try {
138	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
139	<	threadShouldThrow();
140	<	} catch(InterruptedException success){}
141	<	}
142	<	});
143	<	try {
144	<	t.start();
145	<	t.interrupt();
146	<	t.join();
147	<	} catch(Exception e){
148	<	unexpectedException();
172	>	public void testGetReadHoldCount() {
173	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
174	>	for (int i = 1; i <= SIZE; i++) {
175	>	lock.readLock().lock();
176	>	assertEquals(i,lock.getReadHoldCount());
177	>	}
178	>	for (int i = SIZE; i > 0; i--) {
179	>	lock.readLock().unlock();
180	>	assertEquals(i-1,lock.getReadHoldCount());
181		}
182		}
183
152	–
153	–	/**
154	–	* write-trylock fails if locked
155	–	*/
156	–	public void testWriteTryLockWhenLocked() {
157	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
158	–	lock.writeLock().lock();
159	–	Thread t = new Thread(new Runnable() {
160	–	public void run() {
161	–	threadAssertFalse(lock.writeLock().tryLock());
162	–	}
163	–	});
164	–	try {
165	–	t.start();
166	–	t.join();
167	–	lock.writeLock().unlock();
168	–	} catch(Exception e){
169	–	unexpectedException();
170	–	}
171	–	}
184
185		/**
186	<	* read-trylock fails if locked
186	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
187		*/
188	<	public void testReadTryLockWhenLocked() {
189	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
178	<	lock.writeLock().lock();
179	<	Thread t = new Thread(new Runnable() {
180	<	public void run() {
181	<	threadAssertFalse(lock.readLock().tryLock());
182	<	}
183	<	});
188	>	public void testUnlock_IllegalMonitorStateException() {
189	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
190		try {
191	<	t.start();
192	<	t.join();
193	<	lock.writeLock().unlock();
194	<	} catch(Exception e){
195	<	unexpectedException();
190	<	}
191	<	}
191	>	rl.writeLock().unlock();
192	>	shouldThrow();
193	>	} catch (IllegalMonitorStateException success) {}
194	>	}
195	>
196
197		/**
198	<	* Multiple threads can hold a read lock when not write-locked
198	>	* write-lockInterruptibly is interruptible
199		*/
200	<	public void testMultipleReadLocks() {
201	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	<	lock.readLock().lock();
203	<	Thread t = new Thread(new Runnable() {
204	<	public void run() {
205	<	threadAssertTrue(lock.readLock().tryLock());
206	<	lock.readLock().unlock();
207	<	}
208	<	});
209	<	try {
210	<	t.start();
211	<	t.join();
212	<	lock.readLock().unlock();
209	<	} catch(Exception e){
210	<	unexpectedException();
211	<	}
212	<	}
200	>	public void testWriteLockInterruptibly_Interrupted() throws Exception {
201	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
202	>	lock.writeLock().lock();
203	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
204	>	public void realRun() throws InterruptedException {
205	>	lock.writeLock().lockInterruptibly();
206	>	}});
207	>
208	>	Thread.sleep(SHORT_DELAY_MS);
209	>	t.interrupt();
210	>	t.join();
211	>	releaseLock(lock.writeLock());
212	>	}
213
214		/**
215	<	* A writelock succeeds after reading threads unlock
215	>	* timed write-tryLock is interruptible
216	>	*/
217	>	public void testWriteTryLock_Interrupted() throws InterruptedException {
218	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
219	>	lock.writeLock().lock();
220	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
221	>	public void realRun() throws InterruptedException {
222	>	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
223	>	}});
224	>
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	t.interrupt();
227	>	t.join();
228	>	releaseLock(lock.writeLock());
229	>	}
230	>
231	>	/**
232	>	* read-lockInterruptibly is interruptible
233		*/
234	<	public void testWriteAfterMultipleReadLocks() {
235	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	<	lock.readLock().lock();
237	<	Thread t1 = new Thread(new Runnable() {
238	<	public void run() {
239	<	lock.readLock().lock();
240	<	lock.readLock().unlock();
241	<	}
242	<	});
243	<	Thread t2 = new Thread(new Runnable() {
244	<	public void run() {
245	<	lock.writeLock().lock();
246	<	lock.writeLock().unlock();
247	<	}
231	<	});
232	<
233	<	try {
234	<	t1.start();
235	<	t2.start();
236	<	Thread.sleep(SHORT_DELAY_MS);
237	<	lock.readLock().unlock();
238	<	t1.join(MEDIUM_DELAY_MS);
239	<	t2.join(MEDIUM_DELAY_MS);
240	<	assertTrue(!t1.isAlive());
241	<	assertTrue(!t2.isAlive());
242	<
243	<	} catch(Exception e){
244	<	unexpectedException();
245	<	}
246	<	}
234	>	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
236	>	lock.writeLock().lock();
237	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
238	>	public void realRun() throws InterruptedException {
239	>	lock.readLock().lockInterruptibly();
240	>	}});
241	>
242	>	Thread.sleep(SHORT_DELAY_MS);
243	>	t.interrupt();
244	>	Thread.sleep(SHORT_DELAY_MS);
245	>	lock.writeLock().unlock();
246	>	t.join();
247	>	}
248
249		/**
250	<	* Readlocks succeed after a writing thread unlocks
250	>	* timed read-tryLock is interruptible
251		*/
252	<	public void testReadAfterWriteLock() {
253	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	<	lock.writeLock().lock();
255	<	Thread t1 = new Thread(new Runnable() {
256	<	public void run() {
257	<	lock.readLock().lock();
258	<	lock.readLock().unlock();
259	<	}
260	<	});
261	<	Thread t2 = new Thread(new Runnable() {
262	<	public void run() {
263	<	lock.readLock().lock();
263	<	lock.readLock().unlock();
264	<	}
265	<	});
266	<
267	<	try {
268	<	t1.start();
269	<	t2.start();
270	<	Thread.sleep(SHORT_DELAY_MS);
271	<	lock.writeLock().unlock();
272	<	t1.join(MEDIUM_DELAY_MS);
273	<	t2.join(MEDIUM_DELAY_MS);
274	<	assertTrue(!t1.isAlive());
275	<	assertTrue(!t2.isAlive());
276	<
277	<	} catch(Exception e){
278	<	unexpectedException();
279	<	}
280	<	}
252	>	public void testReadTryLock_Interrupted() throws InterruptedException {
253	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
254	>	lock.writeLock().lock();
255	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
256	>	public void realRun() throws InterruptedException {
257	>	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
258	>	}});
259	>
260	>	Thread.sleep(SHORT_DELAY_MS);
261	>	t.interrupt();
262	>	t.join();
263	>	}
264
265
266		/**
267	<	* Read trylock succeeds if readlocked but not writelocked
268	<	*/
269	<	public void testTryLockWhenReadLocked() {
270	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	<	lock.readLock().lock();
272	<	Thread t = new Thread(new Runnable() {
273	<	public void run() {
274	<	threadAssertTrue(lock.readLock().tryLock());
275	<	lock.readLock().unlock();
293	<	}
294	<	});
295	<	try {
296	<	t.start();
297	<	t.join();
298	<	lock.readLock().unlock();
299	<	} catch(Exception e){
300	<	unexpectedException();
301	<	}
302	<	}
267	>	* write-tryLock fails if locked
268	>	*/
269	>	public void testWriteTryLockWhenLocked() throws InterruptedException {
270	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
271	>	lock.writeLock().lock();
272	>	Thread t = newStartedThread(new CheckedRunnable() {
273	>	public void realRun() {
274	>	assertFalse(lock.writeLock().tryLock());
275	>	}});
276
277	<
277	>	t.join();
278	>	lock.writeLock().unlock();
279	>	}
280
281		/**
282	<	* write trylock fails when readlocked
282	>	* read-tryLock fails if locked
283		*/
284	<	public void testWriteTryLockWhenReadLocked() {
285	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	<	lock.readLock().lock();
287	<	Thread t = new Thread(new Runnable() {
288	<	public void run() {
289	<	threadAssertFalse(lock.writeLock().tryLock());
290	<	}
316	<	});
317	<	try {
318	<	t.start();
319	<	t.join();
320	<	lock.readLock().unlock();
321	<	} catch(Exception e){
322	<	unexpectedException();
323	<	}
324	<	}
284	>	public void testReadTryLockWhenLocked() throws InterruptedException {
285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
286	>	lock.writeLock().lock();
287	>	Thread t = newStartedThread(new CheckedRunnable() {
288	>	public void realRun() {
289	>	assertFalse(lock.readLock().tryLock());
290	>	}});
291
292	<
292	>	t.join();
293	>	lock.writeLock().unlock();
294	>	}
295
296		/**
297	<	* write timed trylock times out if locked
298	<	*/
299	<	public void testWriteTryLock_Timeout() {
300	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	<	lock.writeLock().lock();
302	<	Thread t = new Thread(new Runnable() {
303	<	public void run() {
304	<	try {
305	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
306	<	} catch (Exception ex) {
307	<	threadUnexpectedException();
308	<	}
309	<	}
310	<	});
343	<	try {
344	<	t.start();
345	<	t.join();
346	<	lock.writeLock().unlock();
347	<	} catch(Exception e){
348	<	unexpectedException();
349	<	}
350	<	}
297	>	* Multiple threads can hold a read lock when not write-locked
298	>	*/
299	>	public void testMultipleReadLocks() throws InterruptedException {
300	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
301	>	lock.readLock().lock();
302	>	Thread t = newStartedThread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	assertTrue(lock.readLock().tryLock());
305	>	lock.readLock().unlock();
306	>	}});
307	>
308	>	t.join();
309	>	lock.readLock().unlock();
310	>	}
311
312		/**
313	<	* read timed trylock times out if write-locked
313	>	* A writelock succeeds after reading threads unlock
314		*/
315	<	public void testReadTryLock_Timeout() {
316	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	<	lock.writeLock().lock();
318	<	Thread t = new Thread(new Runnable() {
319	<	public void run() {
320	<	try {
321	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
322	<	} catch (Exception ex) {
323	<	threadUnexpectedException();
324	<	}
325	<	}
326	<	});
327	<	try {
328	<	t.start();
329	<	t.join();
330	<	lock.writeLock().unlock();
331	<	} catch(Exception e){
332	<	unexpectedException();
333	<	}
334	<	}
315	>	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
316	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
317	>	lock.readLock().lock();
318	>	Thread t1 = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	lock.readLock().lock();
321	>	lock.readLock().unlock();
322	>	}});
323	>	Thread t2 = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() {
325	>	lock.writeLock().lock();
326	>	lock.writeLock().unlock();
327	>	}});
328	>
329	>	Thread.sleep(SHORT_DELAY_MS);
330	>	lock.readLock().unlock();
331	>	t1.join(MEDIUM_DELAY_MS);
332	>	t2.join(MEDIUM_DELAY_MS);
333	>	assertTrue(!t1.isAlive());
334	>	assertTrue(!t2.isAlive());
335	>	}
336	>
337	>	/**
338	>	* Readlocks succeed after a writing thread unlocks
339	>	*/
340	>	public void testReadAfterWriteLock() throws InterruptedException {
341	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
342	>	lock.writeLock().lock();
343	>	Thread t1 = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() {
345	>	lock.readLock().lock();
346	>	lock.readLock().unlock();
347	>	}});
348	>	Thread t2 = newStartedThread(new CheckedRunnable() {
349	>	public void realRun() {
350	>	lock.readLock().lock();
351	>	lock.readLock().unlock();
352	>	}});
353	>
354	>	Thread.sleep(SHORT_DELAY_MS);
355	>	lock.writeLock().unlock();
356	>	t1.join(MEDIUM_DELAY_MS);
357	>	t2.join(MEDIUM_DELAY_MS);
358	>	assertTrue(!t1.isAlive());
359	>	assertTrue(!t2.isAlive());
360	>	}
361	>
362	>	/**
363	>	* Read trylock succeeds if write locked by current thread
364	>	*/
365	>	public void testReadHoldingWriteLock() {
366	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
367	>	lock.writeLock().lock();
368	>	assertTrue(lock.readLock().tryLock());
369	>	lock.readLock().unlock();
370	>	lock.writeLock().unlock();
371	>	}
372	>
373	>	/**
374	>	* Read lock succeeds if write locked by current thread even if
375	>	* other threads are waiting for readlock
376	>	*/
377	>	public void testReadHoldingWriteLock2() throws InterruptedException {
378	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
379	>	lock.writeLock().lock();
380	>	Thread t1 = newStartedThread(new CheckedRunnable() {
381	>	public void realRun() {
382	>	lock.readLock().lock();
383	>	lock.readLock().unlock();
384	>	}});
385	>	Thread t2 = newStartedThread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	lock.readLock().lock();
388	>	lock.readLock().unlock();
389	>	}});
390	>
391	>	lock.readLock().lock();
392	>	lock.readLock().unlock();
393	>	Thread.sleep(SHORT_DELAY_MS);
394	>	lock.readLock().lock();
395	>	lock.readLock().unlock();
396	>	lock.writeLock().unlock();
397	>	t1.join(MEDIUM_DELAY_MS);
398	>	t2.join(MEDIUM_DELAY_MS);
399	>	assertTrue(!t1.isAlive());
400	>	assertTrue(!t2.isAlive());
401	>	}
402	>
403	>	/**
404	>	* Read lock succeeds if write locked by current thread even if
405	>	* other threads are waiting for writelock
406	>	*/
407	>	public void testReadHoldingWriteLock3() throws InterruptedException {
408	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
409	>	lock.writeLock().lock();
410	>	Thread t1 = newStartedThread(new CheckedRunnable() {
411	>	public void realRun() {
412	>	lock.writeLock().lock();
413	>	lock.writeLock().unlock();
414	>	}});
415	>	Thread t2 = newStartedThread(new CheckedRunnable() {
416	>	public void realRun() {
417	>	lock.writeLock().lock();
418	>	lock.writeLock().unlock();
419	>	}});
420	>
421	>	lock.readLock().lock();
422	>	lock.readLock().unlock();
423	>	Thread.sleep(SHORT_DELAY_MS);
424	>	lock.readLock().lock();
425	>	lock.readLock().unlock();
426	>	lock.writeLock().unlock();
427	>	t1.join(MEDIUM_DELAY_MS);
428	>	t2.join(MEDIUM_DELAY_MS);
429	>	assertTrue(!t1.isAlive());
430	>	assertTrue(!t2.isAlive());
431	>	}
432	>
433	>
434	>	/**
435	>	* Write lock succeeds if write locked by current thread even if
436	>	* other threads are waiting for writelock
437	>	*/
438	>	public void testWriteHoldingWriteLock4() throws InterruptedException {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
440	>	lock.writeLock().lock();
441	>	Thread t1 = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() {
443	>	lock.writeLock().lock();
444	>	lock.writeLock().unlock();
445	>	}});
446	>	Thread t2 = newStartedThread(new CheckedRunnable() {
447	>	public void realRun() {
448	>	lock.writeLock().lock();
449	>	lock.writeLock().unlock();
450	>	}});
451	>
452	>	lock.writeLock().lock();
453	>	lock.writeLock().unlock();
454	>	Thread.sleep(SHORT_DELAY_MS);
455	>	lock.writeLock().lock();
456	>	lock.writeLock().unlock();
457	>	lock.writeLock().unlock();
458	>	t1.join(MEDIUM_DELAY_MS);
459	>	t2.join(MEDIUM_DELAY_MS);
460	>	assertTrue(!t1.isAlive());
461	>	assertTrue(!t2.isAlive());
462	>	}
463	>
464	>
465	>	/**
466	>	* Fair Read trylock succeeds if write locked by current thread
467	>	*/
468	>	public void testReadHoldingWriteLockFair() {
469	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
470	>	lock.writeLock().lock();
471	>	assertTrue(lock.readLock().tryLock());
472	>	lock.readLock().unlock();
473	>	lock.writeLock().unlock();
474	>	}
475	>
476	>	/**
477	>	* Fair Read lock succeeds if write locked by current thread even if
478	>	* other threads are waiting for readlock
479	>	*/
480	>	public void testReadHoldingWriteLockFair2() throws InterruptedException {
481	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
482	>	lock.writeLock().lock();
483	>	Thread t1 = newStartedThread(new CheckedRunnable() {
484	>	public void realRun() {
485	>	lock.readLock().lock();
486	>	lock.readLock().unlock();
487	>	}});
488	>	Thread t2 = newStartedThread(new CheckedRunnable() {
489	>	public void realRun() {
490	>	lock.readLock().lock();
491	>	lock.readLock().unlock();
492	>	}});
493	>
494	>	lock.readLock().lock();
495	>	lock.readLock().unlock();
496	>	Thread.sleep(SHORT_DELAY_MS);
497	>	lock.readLock().lock();
498	>	lock.readLock().unlock();
499	>	lock.writeLock().unlock();
500	>	t1.join(MEDIUM_DELAY_MS);
501	>	t2.join(MEDIUM_DELAY_MS);
502	>	assertTrue(!t1.isAlive());
503	>	assertTrue(!t2.isAlive());
504	>	}
505	>
506	>
507	>	/**
508	>	* Fair Read lock succeeds if write locked by current thread even if
509	>	* other threads are waiting for writelock
510	>	*/
511	>	public void testReadHoldingWriteLockFair3() throws InterruptedException {
512	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
513	>	lock.writeLock().lock();
514	>	Thread t1 = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	lock.writeLock().lock();
517	>	lock.writeLock().unlock();
518	>	}});
519	>	Thread t2 = newStartedThread(new CheckedRunnable() {
520	>	public void realRun() {
521	>	lock.writeLock().lock();
522	>	lock.writeLock().unlock();
523	>	}});
524	>
525	>	lock.readLock().lock();
526	>	lock.readLock().unlock();
527	>	Thread.sleep(SHORT_DELAY_MS);
528	>	lock.readLock().lock();
529	>	lock.readLock().unlock();
530	>	lock.writeLock().unlock();
531	>	t1.join(MEDIUM_DELAY_MS);
532	>	t2.join(MEDIUM_DELAY_MS);
533	>	assertTrue(!t1.isAlive());
534	>	assertTrue(!t2.isAlive());
535	>	}
536	>
537	>
538	>	/**
539	>	* Fair Write lock succeeds if write locked by current thread even if
540	>	* other threads are waiting for writelock
541	>	*/
542	>	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
543	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
544	>	lock.writeLock().lock();
545	>	Thread t1 = newStartedThread(new CheckedRunnable() {
546	>	public void realRun() {
547	>	lock.writeLock().lock();
548	>	lock.writeLock().unlock();
549	>	}});
550	>	Thread t2 = newStartedThread(new CheckedRunnable() {
551	>	public void realRun() {
552	>	lock.writeLock().lock();
553	>	lock.writeLock().unlock();
554	>	}});
555	>
556	>	Thread.sleep(SHORT_DELAY_MS);
557	>	assertTrue(lock.isWriteLockedByCurrentThread());
558	>	assertEquals(1, lock.getWriteHoldCount());
559	>	lock.writeLock().lock();
560	>	assertEquals(2, lock.getWriteHoldCount());
561	>	lock.writeLock().unlock();
562	>	lock.writeLock().lock();
563	>	lock.writeLock().unlock();
564	>	lock.writeLock().unlock();
565	>	t1.join(MEDIUM_DELAY_MS);
566	>	t2.join(MEDIUM_DELAY_MS);
567	>	assertTrue(!t1.isAlive());
568	>	assertTrue(!t2.isAlive());
569	>	}
570	>
571	>
572	>	/**
573	>	* Read tryLock succeeds if readlocked but not writelocked
574	>	*/
575	>	public void testTryLockWhenReadLocked() throws InterruptedException {
576	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
577	>	lock.readLock().lock();
578	>	Thread t = newStartedThread(new CheckedRunnable() {
579	>	public void realRun() {
580	>	assertTrue(lock.readLock().tryLock());
581	>	lock.readLock().unlock();
582	>	}});
583	>
584	>	t.join();
585	>	lock.readLock().unlock();
586	>	}
587	>
588	>	/**
589	>	* write tryLock fails when readlocked
590	>	*/
591	>	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
592	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
593	>	lock.readLock().lock();
594	>	Thread t = newStartedThread(new CheckedRunnable() {
595	>	public void realRun() {
596	>	assertFalse(lock.writeLock().tryLock());
597	>	}});
598	>
599	>	t.join();
600	>	lock.readLock().unlock();
601	>	}
602	>
603	>
604	>	/**
605	>	* Fair Read tryLock succeeds if readlocked but not writelocked
606	>	*/
607	>	public void testTryLockWhenReadLockedFair() throws InterruptedException {
608	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
609	>	lock.readLock().lock();
610	>	Thread t = newStartedThread(new CheckedRunnable() {
611	>	public void realRun() {
612	>	assertTrue(lock.readLock().tryLock());
613	>	lock.readLock().unlock();
614	>	}});
615	>
616	>	t.join();
617	>	lock.readLock().unlock();
618	>	}
619	>
620	>
621	>
622	>	/**
623	>	* Fair write tryLock fails when readlocked
624	>	*/
625	>	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
626	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
627	>	lock.readLock().lock();
628	>	Thread t = newStartedThread(new CheckedRunnable() {
629	>	public void realRun() {
630	>	assertFalse(lock.writeLock().tryLock());
631	>	}});
632	>
633	>	t.join();
634	>	lock.readLock().unlock();
635	>	}
636	>
637	>
638	>
639	>	/**
640	>	* write timed tryLock times out if locked
641	>	*/
642	>	public void testWriteTryLock_Timeout() throws InterruptedException {
643	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
644	>	lock.writeLock().lock();
645	>	Thread t = newStartedThread(new CheckedRunnable() {
646	>	public void realRun() throws InterruptedException {
647	>	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
648	>	}});
649	>
650	>	t.join();
651	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
652	>	lock.writeLock().unlock();
653	>	}
654	>
655	>	/**
656	>	* read timed tryLock times out if write-locked
657	>	*/
658	>	public void testReadTryLock_Timeout() throws InterruptedException {
659	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
660	>	lock.writeLock().lock();
661	>	Thread t = newStartedThread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
664	>	}});
665	>
666	>	t.join();
667	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
668	>	lock.writeLock().unlock();
669	>	}
670
671
672		/**
673		* write lockInterruptibly succeeds if lock free else is interruptible
674		*/
675	<	public void testWriteLockInterruptibly() {
676	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	<	try {
678	<	lock.writeLock().lockInterruptibly();
679	<	} catch(Exception e) {
680	<	unexpectedException();
681	<	}
682	<	Thread t = new Thread(new Runnable() {
683	<	public void run() {
684	<	try {
685	<	lock.writeLock().lockInterruptibly();
686	<	threadShouldThrow();
687	<	}
393	<	catch(InterruptedException success) {
394	<	}
395	<	}
396	<	});
397	<	try {
398	<	t.start();
399	<	t.interrupt();
400	<	t.join();
401	<	lock.writeLock().unlock();
402	<	} catch(Exception e){
403	<	unexpectedException();
404	<	}
675	>	public void testWriteLockInterruptibly() throws InterruptedException {
676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
677	>	lock.writeLock().lockInterruptibly();
678	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
679	>	public void realRun() throws InterruptedException {
680	>	lock.writeLock().lockInterruptibly();
681	>	}});
682	>
683	>	Thread.sleep(SHORT_DELAY_MS);
684	>	t.interrupt();
685	>	Thread.sleep(SHORT_DELAY_MS);
686	>	t.join();
687	>	lock.writeLock().unlock();
688		}
689
690		/**
691	<	*  read lockInterruptibly succeeds if lock free else is interruptible
692	<	*/
693	<	public void testReadLockInterruptibly() {
694	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
695	<	try {
696	<	lock.writeLock().lockInterruptibly();
697	<	} catch(Exception e) {
698	<	unexpectedException();
699	<	}
700	<	Thread t = new Thread(new Runnable() {
701	<	public void run() {
702	<	try {
703	<	lock.readLock().lockInterruptibly();
704	<	threadShouldThrow();
422	<	}
423	<	catch(InterruptedException success) {
424	<	}
425	<	}
426	<	});
427	<	try {
428	<	t.start();
429	<	t.interrupt();
430	<	t.join();
431	<	lock.writeLock().unlock();
432	<	} catch(Exception e){
433	<	unexpectedException();
434	<	}
691	>	* read lockInterruptibly succeeds if lock free else is interruptible
692	>	*/
693	>	public void testReadLockInterruptibly() throws InterruptedException {
694	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
695	>	lock.writeLock().lockInterruptibly();
696	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
697	>	public void realRun() throws InterruptedException {
698	>	lock.readLock().lockInterruptibly();
699	>	}});
700	>
701	>	Thread.sleep(SHORT_DELAY_MS);
702	>	t.interrupt();
703	>	t.join();
704	>	lock.writeLock().unlock();
705		}
706
707		/**
708		* Calling await without holding lock throws IllegalMonitorStateException
709		*/
710	<	public void testAwait_IllegalMonitor() {
711	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
710	>	public void testAwait_IllegalMonitor() throws InterruptedException {
711	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
712		final Condition c = lock.writeLock().newCondition();
713		try {
714		c.await();
715		shouldThrow();
716	<	}
447	<	catch (IllegalMonitorStateException success) {
448	<	}
449	<	catch (Exception ex) {
450	<	shouldThrow();
451	<	}
716	>	} catch (IllegalMonitorStateException success) {}
717		}
718
719		/**
720		* Calling signal without holding lock throws IllegalMonitorStateException
721		*/
722		public void testSignal_IllegalMonitor() {
723	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
723	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
724		final Condition c = lock.writeLock().newCondition();
725		try {
726		c.signal();
727		shouldThrow();
728	<	}
464	<	catch (IllegalMonitorStateException success) {
465	<	}
466	<	catch (Exception ex) {
467	<	unexpectedException();
468	<	}
728	>	} catch (IllegalMonitorStateException success) {}
729		}
730
731		/**
732		* awaitNanos without a signal times out
733		*/
734	<	public void testAwaitNanos_Timeout() {
735	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
734	>	public void testAwaitNanos_Timeout() throws InterruptedException {
735	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
736		final Condition c = lock.writeLock().newCondition();
737	<	try {
738	<	lock.writeLock().lock();
739	<	long t = c.awaitNanos(100);
740	<	assertTrue(t <= 0);
741	<	lock.writeLock().unlock();
482	<	}
483	<	catch (Exception ex) {
484	<	unexpectedException();
485	<	}
737	>
738	>	lock.writeLock().lock();
739	>	long t = c.awaitNanos(100);
740	>	assertTrue(t <= 0);
741	>	lock.writeLock().unlock();
742		}
743
744
745		/**
746	<	*  timed await without a signal times out
746	>	* timed await without a signal times out
747		*/
748	<	public void testAwait_Timeout() {
749	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
748	>	public void testAwait_Timeout() throws InterruptedException {
749	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
750		final Condition c = lock.writeLock().newCondition();
751	<	try {
752	<	lock.writeLock().lock();
753	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
498	<	lock.writeLock().unlock();
499	<	}
500	<	catch (Exception ex) {
501	<	unexpectedException();
502	<	}
751	>	lock.writeLock().lock();
752	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
753	>	lock.writeLock().unlock();
754		}
755
756		/**
757		* awaitUntil without a signal times out
758		*/
759	<	public void testAwaitUntil_Timeout() {
760	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
759	>	public void testAwaitUntil_Timeout() throws InterruptedException {
760	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
761		final Condition c = lock.writeLock().newCondition();
762	<	try {
763	<	lock.writeLock().lock();
764	<	java.util.Date d = new java.util.Date();
765	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
515	<	lock.writeLock().unlock();
516	<	}
517	<	catch (Exception ex) {
518	<	unexpectedException();
519	<	}
762	>	lock.writeLock().lock();
763	>	java.util.Date d = new java.util.Date();
764	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
765	>	lock.writeLock().unlock();
766		}
767
768		/**
769		* await returns when signalled
770		*/
771	<	public void testAwait() {
772	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
771	>	public void testAwait() throws InterruptedException {
772	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
773		final Condition c = lock.writeLock().newCondition();
774	<	Thread t = new Thread(new Runnable() {
775	<	public void run() {
776	<	try {
777	<	lock.writeLock().lock();
778	<	c.await();
779	<	lock.writeLock().unlock();
780	<	}
781	<	catch(InterruptedException e) {
782	<	threadUnexpectedException();
783	<	}
784	<	}
785	<	});
774	>	Thread t = newStartedThread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	lock.writeLock().lock();
777	>	c.await();
778	>	lock.writeLock().unlock();
779	>	}});
780	>
781	>	Thread.sleep(SHORT_DELAY_MS);
782	>	lock.writeLock().lock();
783	>	c.signal();
784	>	lock.writeLock().unlock();
785	>	t.join(SHORT_DELAY_MS);
786	>	assertFalse(t.isAlive());
787	>	}
788	>
789	>	/** A helper class for uninterruptible wait tests */
790	>	class UninterruptableThread extends Thread {
791	>	private Lock lock;
792	>	private Condition c;
793	>
794	>	public volatile boolean canAwake = false;
795	>	public volatile boolean interrupted = false;
796	>	public volatile boolean lockStarted = false;
797	>
798	>	public UninterruptableThread(Lock lock, Condition c) {
799	>	this.lock = lock;
800	>	this.c = c;
801	>	}
802	>
803	>	public synchronized void run() {
804	>	lock.lock();
805	>	lockStarted = true;
806	>
807	>	while (!canAwake) {
808	>	c.awaitUninterruptibly();
809	>	}
810
811	<	try {
812	<	t.start();
543	<	Thread.sleep(SHORT_DELAY_MS);
544	<	lock.writeLock().lock();
545	<	c.signal();
546	<	lock.writeLock().unlock();
547	<	t.join(SHORT_DELAY_MS);
548	<	assertFalse(t.isAlive());
549	<	}
550	<	catch (Exception ex) {
551	<	unexpectedException();
811	>	interrupted = isInterrupted();
812	>	lock.unlock();
813		}
814		}
815
816		/**
817		* awaitUninterruptibly doesn't abort on interrupt
818		*/
819	<	public void testAwaitUninterruptibly() {
820	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
819	>	public void testAwaitUninterruptibly() throws InterruptedException {
820	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
821		final Condition c = lock.writeLock().newCondition();
822	<	Thread t = new Thread(new Runnable() {
562	<	public void run() {
563	<	lock.writeLock().lock();
564	<	c.awaitUninterruptibly();
565	<	lock.writeLock().unlock();
566	<	}
567	<	});
822	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
823
824	+	thread.start();
825	+
826	+	while (!thread.lockStarted) {
827	+	Thread.sleep(100);
828	+	}
829	+
830	+	lock.writeLock().lock();
831		try {
832	<	t.start();
833	<	Thread.sleep(SHORT_DELAY_MS);
572	<	t.interrupt();
573	<	lock.writeLock().lock();
832	>	thread.interrupt();
833	>	thread.canAwake = true;
834		c.signal();
835	+	} finally {
836		lock.writeLock().unlock();
576	–	assert(t.isInterrupted());
577	–	t.join(SHORT_DELAY_MS);
578	–	assertFalse(t.isAlive());
579	–	}
580	–	catch (Exception ex) {
581	–	unexpectedException();
837		}
838	+
839	+	thread.join();
840	+	assertTrue(thread.interrupted);
841	+	assertFalse(thread.isAlive());
842		}
843
844		/**
845		* await is interruptible
846		*/
847	<	public void testAwait_Interrupt() {
848	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
847	>	public void testAwait_Interrupt() throws InterruptedException {
848	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
849		final Condition c = lock.writeLock().newCondition();
850	<	Thread t = new Thread(new Runnable() {
851	<	public void run() {
852	<	try {
853	<	lock.writeLock().lock();
854	<	c.await();
855	<	lock.writeLock().unlock();
856	<	threadShouldThrow();
857	<	}
858	<	catch(InterruptedException success) {
859	<	}
860	<	}
602	<	});
603	<
604	<	try {
605	<	t.start();
606	<	Thread.sleep(SHORT_DELAY_MS);
607	<	t.interrupt();
608	<	t.join(SHORT_DELAY_MS);
609	<	assertFalse(t.isAlive());
610	<	}
611	<	catch (Exception ex) {
612	<	unexpectedException();
613	<	}
850	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
851	>	public void realRun() throws InterruptedException {
852	>	lock.writeLock().lock();
853	>	c.await();
854	>	lock.writeLock().unlock();
855	>	}});
856	>
857	>	Thread.sleep(SHORT_DELAY_MS);
858	>	t.interrupt();
859	>	t.join(SHORT_DELAY_MS);
860	>	assertFalse(t.isAlive());
861		}
862
863		/**
864		* awaitNanos is interruptible
865		*/
866	<	public void testAwaitNanos_Interrupt() {
867	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
866	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
867	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
868		final Condition c = lock.writeLock().newCondition();
869	<	Thread t = new Thread(new Runnable() {
870	<	public void run() {
871	<	try {
872	<	lock.writeLock().lock();
873	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
874	<	lock.writeLock().unlock();
875	<	threadShouldThrow();
876	<	}
877	<	catch(InterruptedException success) {
878	<	}
879	<	}
633	<	});
634	<
635	<	try {
636	<	t.start();
637	<	Thread.sleep(SHORT_DELAY_MS);
638	<	t.interrupt();
639	<	t.join(SHORT_DELAY_MS);
640	<	assertFalse(t.isAlive());
641	<	}
642	<	catch (Exception ex) {
643	<	unexpectedException();
644	<	}
869	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
870	>	public void realRun() throws InterruptedException {
871	>	lock.writeLock().lock();
872	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
873	>	lock.writeLock().unlock();
874	>	}});
875	>
876	>	Thread.sleep(SHORT_DELAY_MS);
877	>	t.interrupt();
878	>	t.join(SHORT_DELAY_MS);
879	>	assertFalse(t.isAlive());
880		}
881
882		/**
883		* awaitUntil is interruptible
884		*/
885	<	public void testAwaitUntil_Interrupt() {
886	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
885	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
886	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
887		final Condition c = lock.writeLock().newCondition();
888	<	Thread t = new Thread(new Runnable() {
889	<	public void run() {
890	<	try {
891	<	lock.writeLock().lock();
892	<	java.util.Date d = new java.util.Date();
893	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
894	<	lock.writeLock().unlock();
895	<	threadShouldThrow();
896	<	}
897	<	catch(InterruptedException success) {
898	<	}
899	<	}
665	<	});
666	<
667	<	try {
668	<	t.start();
669	<	Thread.sleep(SHORT_DELAY_MS);
670	<	t.interrupt();
671	<	t.join(SHORT_DELAY_MS);
672	<	assertFalse(t.isAlive());
673	<	}
674	<	catch (Exception ex) {
675	<	unexpectedException();
676	<	}
888	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
889	>	public void realRun() throws InterruptedException {
890	>	lock.writeLock().lock();
891	>	java.util.Date d = new java.util.Date();
892	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
893	>	lock.writeLock().unlock();
894	>	}});
895	>
896	>	Thread.sleep(SHORT_DELAY_MS);
897	>	t.interrupt();
898	>	t.join(SHORT_DELAY_MS);
899	>	assertFalse(t.isAlive());
900		}
901
902		/**
903		* signalAll wakes up all threads
904		*/
905	<	public void testSignalAll() {
906	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
905	>	public void testSignalAll() throws InterruptedException {
906	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
907		final Condition c = lock.writeLock().newCondition();
908	<	Thread t1 = new Thread(new Runnable() {
909	<	public void run() {
910	<	try {
911	<	lock.writeLock().lock();
912	<	c.await();
913	<	lock.writeLock().unlock();
914	<	}
915	<	catch(InterruptedException e) {
916	<	threadUnexpectedException();
917	<	}
918	<	}
919	<	});
920	<
921	<	Thread t2 = new Thread(new Runnable() {
922	<	public void run() {
923	<	try {
924	<	lock.writeLock().lock();
925	<	c.await();
926	<	lock.writeLock().unlock();
927	<	}
928	<	catch(InterruptedException e) {
929	<	threadUnexpectedException();
707	<	}
708	<	}
709	<	});
710	<
711	<	try {
712	<	t1.start();
713	<	t2.start();
714	<	Thread.sleep(SHORT_DELAY_MS);
715	<	lock.writeLock().lock();
716	<	c.signalAll();
717	<	lock.writeLock().unlock();
718	<	t1.join(SHORT_DELAY_MS);
719	<	t2.join(SHORT_DELAY_MS);
720	<	assertFalse(t1.isAlive());
721	<	assertFalse(t2.isAlive());
722	<	}
723	<	catch (Exception ex) {
724	<	unexpectedException();
725	<	}
908	>	Thread t1 = newStartedThread(new CheckedRunnable() {
909	>	public void realRun() throws InterruptedException {
910	>	lock.writeLock().lock();
911	>	c.await();
912	>	lock.writeLock().unlock();
913	>	}});
914	>
915	>	Thread t2 = newStartedThread(new CheckedRunnable() {
916	>	public void realRun() throws InterruptedException {
917	>	lock.writeLock().lock();
918	>	c.await();
919	>	lock.writeLock().unlock();
920	>	}});
921	>
922	>	Thread.sleep(SHORT_DELAY_MS);
923	>	lock.writeLock().lock();
924	>	c.signalAll();
925	>	lock.writeLock().unlock();
926	>	t1.join(SHORT_DELAY_MS);
927	>	t2.join(SHORT_DELAY_MS);
928	>	assertFalse(t1.isAlive());
929	>	assertFalse(t2.isAlive());
930		}
931
932		/**
933		* A serialized lock deserializes as unlocked
934		*/
935	<	public void testSerialization() {
935	>	public void testSerialization() throws Exception {
936		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
937		l.readLock().lock();
938		l.readLock().unlock();
939
940	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
941	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
942	+	out.writeObject(l);
943	+	out.close();
944	+
945	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
946	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
947	+	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
948	+	r.readLock().lock();
949	+	r.readLock().unlock();
950	+	}
951	+
952	+	/**
953	+	* hasQueuedThreads reports whether there are waiting threads
954	+	*/
955	+	public void testhasQueuedThreads() throws InterruptedException {
956	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
957	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
958	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
959	+	assertFalse(lock.hasQueuedThreads());
960	+	lock.writeLock().lock();
961	+	t1.start();
962	+	Thread.sleep(SHORT_DELAY_MS);
963	+	assertTrue(lock.hasQueuedThreads());
964	+	t2.start();
965	+	Thread.sleep(SHORT_DELAY_MS);
966	+	assertTrue(lock.hasQueuedThreads());
967	+	t1.interrupt();
968	+	Thread.sleep(SHORT_DELAY_MS);
969	+	assertTrue(lock.hasQueuedThreads());
970	+	lock.writeLock().unlock();
971	+	Thread.sleep(SHORT_DELAY_MS);
972	+	assertFalse(lock.hasQueuedThreads());
973	+	t1.join();
974	+	t2.join();
975	+	}
976	+
977	+	/**
978	+	* hasQueuedThread(null) throws NPE
979	+	*/
980	+	public void testHasQueuedThreadNPE() {
981	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
982		try {
983	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
984	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
985	<	out.writeObject(l);
986	<	out.close();
987	<
988	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
989	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
990	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
991	<	r.readLock().lock();
992	<	r.readLock().unlock();
993	<	} catch(Exception e){
994	<	e.printStackTrace();
995	<	unexpectedException();
996	<	}
983	>	sync.hasQueuedThread(null);
984	>	shouldThrow();
985	>	} catch (NullPointerException success) {}
986	>	}
987	>
988	>	/**
989	>	* hasQueuedThread reports whether a thread is queued.
990	>	*/
991	>	public void testHasQueuedThread() throws InterruptedException {
992	>	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
993	>	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
994	>	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
995	>	assertFalse(sync.hasQueuedThread(t1));
996	>	assertFalse(sync.hasQueuedThread(t2));
997	>	sync.writeLock().lock();
998	>	t1.start();
999	>	Thread.sleep(SHORT_DELAY_MS);
1000	>	assertTrue(sync.hasQueuedThread(t1));
1001	>	t2.start();
1002	>	Thread.sleep(SHORT_DELAY_MS);
1003	>	assertTrue(sync.hasQueuedThread(t1));
1004	>	assertTrue(sync.hasQueuedThread(t2));
1005	>	t1.interrupt();
1006	>	Thread.sleep(SHORT_DELAY_MS);
1007	>	assertFalse(sync.hasQueuedThread(t1));
1008	>	assertTrue(sync.hasQueuedThread(t2));
1009	>	sync.writeLock().unlock();
1010	>	Thread.sleep(SHORT_DELAY_MS);
1011	>	assertFalse(sync.hasQueuedThread(t1));
1012	>	Thread.sleep(SHORT_DELAY_MS);
1013	>	assertFalse(sync.hasQueuedThread(t2));
1014	>	t1.join();
1015	>	t2.join();
1016	>	}
1017	>
1018	>
1019	>	/**
1020	>	* getQueueLength reports number of waiting threads
1021	>	*/
1022	>	public void testGetQueueLength() throws InterruptedException {
1023	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1024	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1025	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1026	>	assertEquals(0, lock.getQueueLength());
1027	>	lock.writeLock().lock();
1028	>	t1.start();
1029	>	Thread.sleep(SHORT_DELAY_MS);
1030	>	assertEquals(1, lock.getQueueLength());
1031	>	t2.start();
1032	>	Thread.sleep(SHORT_DELAY_MS);
1033	>	assertEquals(2, lock.getQueueLength());
1034	>	t1.interrupt();
1035	>	Thread.sleep(SHORT_DELAY_MS);
1036	>	assertEquals(1, lock.getQueueLength());
1037	>	lock.writeLock().unlock();
1038	>	Thread.sleep(SHORT_DELAY_MS);
1039	>	assertEquals(0, lock.getQueueLength());
1040	>	t1.join();
1041	>	t2.join();
1042	>	}
1043	>
1044	>	/**
1045	>	* getQueuedThreads includes waiting threads
1046	>	*/
1047	>	public void testGetQueuedThreads() throws InterruptedException {
1048	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1049	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1050	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1051	>	assertTrue(lock.getQueuedThreads().isEmpty());
1052	>	lock.writeLock().lock();
1053	>	assertTrue(lock.getQueuedThreads().isEmpty());
1054	>	t1.start();
1055	>	Thread.sleep(SHORT_DELAY_MS);
1056	>	assertTrue(lock.getQueuedThreads().contains(t1));
1057	>	t2.start();
1058	>	Thread.sleep(SHORT_DELAY_MS);
1059	>	assertTrue(lock.getQueuedThreads().contains(t1));
1060	>	assertTrue(lock.getQueuedThreads().contains(t2));
1061	>	t1.interrupt();
1062	>	Thread.sleep(SHORT_DELAY_MS);
1063	>	assertFalse(lock.getQueuedThreads().contains(t1));
1064	>	assertTrue(lock.getQueuedThreads().contains(t2));
1065	>	lock.writeLock().unlock();
1066	>	Thread.sleep(SHORT_DELAY_MS);
1067	>	assertTrue(lock.getQueuedThreads().isEmpty());
1068	>	t1.join();
1069	>	t2.join();
1070	>	}
1071	>
1072	>	/**
1073	>	* hasWaiters throws NPE if null
1074	>	*/
1075	>	public void testHasWaitersNPE() {
1076	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1077	>	try {
1078	>	lock.hasWaiters(null);
1079	>	shouldThrow();
1080	>	} catch (NullPointerException success) {}
1081	>	}
1082	>
1083	>	/**
1084	>	* getWaitQueueLength throws NPE if null
1085	>	*/
1086	>	public void testGetWaitQueueLengthNPE() {
1087	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1088	>	try {
1089	>	lock.getWaitQueueLength(null);
1090	>	shouldThrow();
1091	>	} catch (NullPointerException success) {}
1092	>	}
1093	>
1094	>
1095	>	/**
1096	>	* getWaitingThreads throws NPE if null
1097	>	*/
1098	>	public void testGetWaitingThreadsNPE() {
1099	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1100	>	try {
1101	>	lock.getWaitingThreads(null);
1102	>	shouldThrow();
1103	>	} catch (NullPointerException success) {}
1104	>	}
1105	>
1106	>	/**
1107	>	* hasWaiters throws IAE if not owned
1108	>	*/
1109	>	public void testHasWaitersIAE() {
1110	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1111	>	final Condition c = lock.writeLock().newCondition();
1112	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1113	>	try {
1114	>	lock2.hasWaiters(c);
1115	>	shouldThrow();
1116	>	} catch (IllegalArgumentException success) {}
1117		}
1118
1119	+	/**
1120	+	* hasWaiters throws IMSE if not locked
1121	+	*/
1122	+	public void testHasWaitersIMSE() {
1123	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1124	+	final Condition c = lock.writeLock().newCondition();
1125	+	try {
1126	+	lock.hasWaiters(c);
1127	+	shouldThrow();
1128	+	} catch (IllegalMonitorStateException success) {}
1129	+	}
1130	+
1131	+
1132	+	/**
1133	+	* getWaitQueueLength throws IAE if not owned
1134	+	*/
1135	+	public void testGetWaitQueueLengthIAE() {
1136	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1137	+	final Condition c = lock.writeLock().newCondition();
1138	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1139	+	try {
1140	+	lock2.getWaitQueueLength(c);
1141	+	shouldThrow();
1142	+	} catch (IllegalArgumentException success) {}
1143	+	}
1144	+
1145	+	/**
1146	+	* getWaitQueueLength throws IMSE if not locked
1147	+	*/
1148	+	public void testGetWaitQueueLengthIMSE() {
1149	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1150	+	final Condition c = lock.writeLock().newCondition();
1151	+	try {
1152	+	lock.getWaitQueueLength(c);
1153	+	shouldThrow();
1154	+	} catch (IllegalMonitorStateException success) {}
1155	+	}
1156	+
1157	+
1158	+	/**
1159	+	* getWaitingThreads throws IAE if not owned
1160	+	*/
1161	+	public void testGetWaitingThreadsIAE() {
1162	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1163	+	final Condition c = lock.writeLock().newCondition();
1164	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1165	+	try {
1166	+	lock2.getWaitingThreads(c);
1167	+	shouldThrow();
1168	+	} catch (IllegalArgumentException success) {}
1169	+	}
1170	+
1171	+	/**
1172	+	* getWaitingThreads throws IMSE if not locked
1173	+	*/
1174	+	public void testGetWaitingThreadsIMSE() {
1175	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1176	+	final Condition c = lock.writeLock().newCondition();
1177	+	try {
1178	+	lock.getWaitingThreads(c);
1179	+	shouldThrow();
1180	+	} catch (IllegalMonitorStateException success) {}
1181	+	}
1182	+
1183	+
1184	+	/**
1185	+	* hasWaiters returns true when a thread is waiting, else false
1186	+	*/
1187	+	public void testHasWaiters() throws InterruptedException {
1188	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1189	+	final Condition c = lock.writeLock().newCondition();
1190	+	Thread t = newStartedThread(new CheckedRunnable() {
1191	+	public void realRun() throws InterruptedException {
1192	+	lock.writeLock().lock();
1193	+	assertFalse(lock.hasWaiters(c));
1194	+	assertEquals(0, lock.getWaitQueueLength(c));
1195	+	c.await();
1196	+	lock.writeLock().unlock();
1197	+	}});
1198	+
1199	+	Thread.sleep(SHORT_DELAY_MS);
1200	+	lock.writeLock().lock();
1201	+	assertTrue(lock.hasWaiters(c));
1202	+	assertEquals(1, lock.getWaitQueueLength(c));
1203	+	c.signal();
1204	+	lock.writeLock().unlock();
1205	+	Thread.sleep(SHORT_DELAY_MS);
1206	+	lock.writeLock().lock();
1207	+	assertFalse(lock.hasWaiters(c));
1208	+	assertEquals(0, lock.getWaitQueueLength(c));
1209	+	lock.writeLock().unlock();
1210	+	t.join(SHORT_DELAY_MS);
1211	+	assertFalse(t.isAlive());
1212	+	}
1213	+
1214	+	/**
1215	+	* getWaitQueueLength returns number of waiting threads
1216	+	*/
1217	+	public void testGetWaitQueueLength() throws InterruptedException {
1218	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1219	+	final Condition c = lock.writeLock().newCondition();
1220	+	Thread t = newStartedThread(new CheckedRunnable() {
1221	+	public void realRun() throws InterruptedException {
1222	+	lock.writeLock().lock();
1223	+	assertFalse(lock.hasWaiters(c));
1224	+	assertEquals(0, lock.getWaitQueueLength(c));
1225	+	c.await();
1226	+	lock.writeLock().unlock();
1227	+	}});
1228	+
1229	+	Thread.sleep(SHORT_DELAY_MS);
1230	+	lock.writeLock().lock();
1231	+	assertTrue(lock.hasWaiters(c));
1232	+	assertEquals(1, lock.getWaitQueueLength(c));
1233	+	c.signal();
1234	+	lock.writeLock().unlock();
1235	+	Thread.sleep(SHORT_DELAY_MS);
1236	+	lock.writeLock().lock();
1237	+	assertFalse(lock.hasWaiters(c));
1238	+	assertEquals(0, lock.getWaitQueueLength(c));
1239	+	lock.writeLock().unlock();
1240	+	t.join(SHORT_DELAY_MS);
1241	+	assertFalse(t.isAlive());
1242	+	}
1243	+
1244	+
1245	+	/**
1246	+	* getWaitingThreads returns only and all waiting threads
1247	+	*/
1248	+	public void testGetWaitingThreads() throws InterruptedException {
1249	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1250	+	final Condition c = lock.writeLock().newCondition();
1251	+	Thread t1 = new Thread(new CheckedRunnable() {
1252	+	public void realRun() throws InterruptedException {
1253	+	lock.writeLock().lock();
1254	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1255	+	c.await();
1256	+	lock.writeLock().unlock();
1257	+	}});
1258	+
1259	+	Thread t2 = new Thread(new CheckedRunnable() {
1260	+	public void realRun() throws InterruptedException {
1261	+	lock.writeLock().lock();
1262	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
1263	+	c.await();
1264	+	lock.writeLock().unlock();
1265	+	}});
1266	+
1267	+	lock.writeLock().lock();
1268	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1269	+	lock.writeLock().unlock();
1270	+	t1.start();
1271	+	Thread.sleep(SHORT_DELAY_MS);
1272	+	t2.start();
1273	+	Thread.sleep(SHORT_DELAY_MS);
1274	+	lock.writeLock().lock();
1275	+	assertTrue(lock.hasWaiters(c));
1276	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1277	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1278	+	c.signalAll();
1279	+	lock.writeLock().unlock();
1280	+	Thread.sleep(SHORT_DELAY_MS);
1281	+	lock.writeLock().lock();
1282	+	assertFalse(lock.hasWaiters(c));
1283	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1284	+	lock.writeLock().unlock();
1285	+	t1.join(SHORT_DELAY_MS);
1286	+	t2.join(SHORT_DELAY_MS);
1287	+	assertFalse(t1.isAlive());
1288	+	assertFalse(t2.isAlive());
1289	+	}
1290	+
1291	+	/**
1292	+	* toString indicates current lock state
1293	+	*/
1294	+	public void testToString() {
1295	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1296	+	String us = lock.toString();
1297	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1298	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1299	+	lock.writeLock().lock();
1300	+	String ws = lock.toString();
1301	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1302	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1303	+	lock.writeLock().unlock();
1304	+	lock.readLock().lock();
1305	+	lock.readLock().lock();
1306	+	String rs = lock.toString();
1307	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1308	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1309	+	}
1310	+
1311	+	/**
1312	+	* readLock.toString indicates current lock state
1313	+	*/
1314	+	public void testReadLockToString() {
1315	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1316	+	String us = lock.readLock().toString();
1317	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1318	+	lock.readLock().lock();
1319	+	lock.readLock().lock();
1320	+	String rs = lock.readLock().toString();
1321	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1322	+	}
1323	+
1324	+	/**
1325	+	* writeLock.toString indicates current lock state
1326	+	*/
1327	+	public void testWriteLockToString() {
1328	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1329	+	String us = lock.writeLock().toString();
1330	+	assertTrue(us.indexOf("Unlocked") >= 0);
1331	+	lock.writeLock().lock();
1332	+	String ls = lock.writeLock().toString();
1333	+	assertTrue(ls.indexOf("Locked") >= 0);
1334	+	}
1335
1336		}

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