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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.14 by dl, Sun Dec 28 22:44:59 2003 UTC vs.
Revision 1.69 by jsr166, Wed Dec 31 19:05:43 2014 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
13	<	import java.util.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29	<	return new TestSuite(ReentrantReadWriteLockTest.class);
29	>	return new TestSuite(ReentrantReadWriteLockTest.class);
30		}
31
32		/**
33		* A runnable calling lockInterruptibly
34		*/
35	<	class InterruptibleLockRunnable implements Runnable {
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36		final ReentrantReadWriteLock lock;
37		InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
38	<	public void run() {
39	<	try {
31	<	lock.writeLock().lockInterruptibly();
32	<	} catch(InterruptedException success){}
38	>	public void realRun() throws InterruptedException {
39	>	lock.writeLock().lockInterruptibly();
40		}
41		}
42
36	–
43		/**
44		* A runnable calling lockInterruptibly that expects to be
45		* interrupted
46		*/
47	<	class InterruptedLockRunnable implements Runnable {
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48		final ReentrantReadWriteLock lock;
49		InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
50	<	public void run() {
51	<	try {
46	<	lock.writeLock().lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
50	>	public void realRun() throws InterruptedException {
51	>	lock.writeLock().lockInterruptibly();
52		}
53		}
54
#	Line 54 | Line 57 | public class ReentrantReadWriteLockTest
57		*/
58		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
59		PublicReentrantReadWriteLock() { super(); }
60	<	public Collection<Thread> getQueuedThreads() {
61	<	return super.getQueuedThreads();
60	>	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
61	>	public Thread getOwner() {
62	>	return super.getOwner();
63		}
64	<	public Collection<Thread> getWaitingThreads(Condition c) {
65	<	return super.getWaitingThreads(c);
64	>	public Collection<Thread> getQueuedThreads() {
65	>	return super.getQueuedThreads();
66	>	}
67	>	public Collection<Thread> getWaitingThreads(Condition c) {
68	>	return super.getWaitingThreads(c);
69		}
70		}
71
72		/**
73	<	* Constructor sets given fairness, and is in unlocked state
73	>	* Releases write lock, checking that it had a hold count of 1.
74		*/
75	<	public void testConstructor() {
76	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
77	<	assertFalse(rl.isFair());
78	<	assertFalse(rl.isWriteLocked());
79	<	assertEquals(0, rl.getReadLockCount());
80	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	<	assertTrue(r2.isFair());
75	<	assertFalse(r2.isWriteLocked());
76	<	assertEquals(0, r2.getReadLockCount());
75	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	>	assertWriteLockedByMoi(lock);
78	>	assertEquals(1, lock.getWriteHoldCount());
79	>	writeLock.unlock();
80	>	assertNotWriteLocked(lock);
81		}
82
83		/**
84	<	* write-locking and read-locking an unlocked lock succeed
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85		*/
86	<	public void testLock() {
87	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
88	<	rl.writeLock().lock();
89	<	assertTrue(rl.isWriteLocked());
90	<	assertTrue(rl.isWriteLockedByCurrentThread());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.writeLock().unlock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	rl.readLock().lock();
93	<	assertFalse(rl.isWriteLocked());
94	<	assertFalse(rl.isWriteLockedByCurrentThread());
95	<	assertEquals(1, rl.getReadLockCount());
96	<	rl.readLock().unlock();
97	<	assertFalse(rl.isWriteLocked());
98	<	assertFalse(rl.isWriteLockedByCurrentThread());
99	<	assertEquals(0, rl.getReadLockCount());
86	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
87	>	long startTime = System.nanoTime();
88	>	while (!lock.hasQueuedThread(t)) {
89	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	>	throw new AssertionFailedError("timed out");
91	>	Thread.yield();
92	>	}
93	>	assertTrue(t.isAlive());
94	>	assertNotSame(t, lock.getOwner());
95		}
96
102	–
97		/**
98	<	* locking an unlocked fair lock succeeds
99	<	*/
100	<	public void testFairLock() {
101	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
102	<	rl.writeLock().lock();
103	<	assertTrue(rl.isWriteLocked());
104	<	assertTrue(rl.isWriteLockedByCurrentThread());
105	<	assertEquals(0, rl.getReadLockCount());
106	<	rl.writeLock().unlock();
113	<	assertFalse(rl.isWriteLocked());
114	<	assertFalse(rl.isWriteLockedByCurrentThread());
115	<	assertEquals(0, rl.getReadLockCount());
116	<	rl.readLock().lock();
117	<	assertFalse(rl.isWriteLocked());
118	<	assertFalse(rl.isWriteLockedByCurrentThread());
119	<	assertEquals(1, rl.getReadLockCount());
120	<	rl.readLock().unlock();
121	<	assertFalse(rl.isWriteLocked());
122	<	assertFalse(rl.isWriteLockedByCurrentThread());
123	<	assertEquals(0, rl.getReadLockCount());
98	>	* Checks that lock is not write-locked.
99	>	*/
100	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
101	>	assertFalse(lock.isWriteLocked());
102	>	assertFalse(lock.isWriteLockedByCurrentThread());
103	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
104	>	assertEquals(0, lock.getWriteHoldCount());
105	>	assertEquals(0, lock.writeLock().getHoldCount());
106	>	assertNull(lock.getOwner());
107		}
108
109		/**
110	<	* getWriteHoldCount returns number of recursive holds
110	>	* Checks that lock is write-locked by the given thread.
111		*/
112	<	public void testGetHoldCount() {
113	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
114	<	for(int i = 1; i <= SIZE; i++) {
115	<	lock.writeLock().lock();
116	<	assertEquals(i,lock.getWriteHoldCount());
117	<	}
118	<	for(int i = SIZE; i > 0; i--) {
119	<	lock.writeLock().unlock();
120	<	assertEquals(i-1,lock.getWriteHoldCount());
121	<	}
112	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
113	>	assertTrue(lock.isWriteLocked());
114	>	assertSame(t, lock.getOwner());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.isWriteLockedByCurrentThread());
117	>	assertEquals(t == Thread.currentThread(),
118	>	lock.writeLock().isHeldByCurrentThread());
119	>	assertEquals(t == Thread.currentThread(),
120	>	lock.getWriteHoldCount() > 0);
121	>	assertEquals(t == Thread.currentThread(),
122	>	lock.writeLock().getHoldCount() > 0);
123	>	assertEquals(0, lock.getReadLockCount());
124		}
140	–
125
126		/**
127	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
127	>	* Checks that lock is write-locked by the current thread.
128		*/
129	<	public void testUnlock_IllegalMonitorStateException() {
130	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
147	<	try {
148	<	rl.writeLock().unlock();
149	<	shouldThrow();
150	<	} catch(IllegalMonitorStateException success){}
129	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	>	assertWriteLockedBy(lock, Thread.currentThread());
131		}
132
153	–
133		/**
134	<	* write-lockInterruptibly is interruptible
134	>	* Checks that condition c has no waiters.
135		*/
136	<	public void testWriteLockInterruptibly_Interrupted() {
137	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
138	<	lock.writeLock().lock();
160	<	Thread t = new Thread(new Runnable() {
161	<	public void run() {
162	<	try {
163	<	lock.writeLock().lockInterruptibly();
164	<	threadShouldThrow();
165	<	} catch(InterruptedException success){}
166	<	}
167	<	});
168	<	try {
169	<	t.start();
170	<	t.interrupt();
171	<	lock.writeLock().unlock();
172	<	t.join();
173	<	} catch(Exception e){
174	<	unexpectedException();
175	<	}
176	<	}
136	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
137	>	assertHasWaiters(lock, c, new Thread[] {});
138	>	}
139
140		/**
141	<	* timed write-trylock is interruptible
141	>	* Checks that condition c has exactly the given waiter threads.
142		*/
143	<	public void testWriteTryLock_Interrupted() {
144	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
145	<	lock.writeLock().lock();
146	<	Thread t = new Thread(new Runnable() {
147	<	public void run() {
148	<	try {
149	<	lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
150	<	threadShouldThrow();
151	<	} catch(InterruptedException success){}
152	<	}
191	<	});
192	<	try {
193	<	t.start();
194	<	t.interrupt();
195	<	lock.writeLock().unlock();
196	<	t.join();
197	<	} catch(Exception e){
198	<	unexpectedException();
199	<	}
143	>	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
144	>	Thread... threads) {
145	>	lock.writeLock().lock();
146	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
147	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
148	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
149	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
150	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
151	>	new HashSet<Thread>(Arrays.asList(threads)));
152	>	lock.writeLock().unlock();
153		}
154
155	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156	+
157		/**
158	<	* read-lockInterruptibly is interruptible
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160	<	public void testReadLockInterruptibly_Interrupted() {
161	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
162	<	lock.writeLock().lock();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	lock.readLock().lockInterruptibly();
167	<	threadShouldThrow();
168	<	} catch(InterruptedException success){}
169	<	}
170	<	});
171	<	try {
172	<	t.start();
173	<	t.interrupt();
174	<	lock.writeLock().unlock();
175	<	t.join();
176	<	} catch(Exception e){
222	<	unexpectedException();
160	>	void await(Condition c, AwaitMethod awaitMethod)
161	>	throws InterruptedException {
162	>	switch (awaitMethod) {
163	>	case await:
164	>	c.await();
165	>	break;
166	>	case awaitTimed:
167	>	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
168	>	break;
169	>	case awaitNanos:
170	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
171	>	assertTrue(nanosRemaining > 0);
172	>	break;
173	>	case awaitUntil:
174	>	java.util.Date d = new java.util.Date();
175	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
176	>	break;
177		}
178	<	}
178	>	}
179
180		/**
181	<	* timed read-trylock is interruptible
181	>	* Constructor sets given fairness, and is in unlocked state
182		*/
183	<	public void testReadTryLock_Interrupted() {
184	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
185	<	lock.writeLock().lock();
186	<	Thread t = new Thread(new Runnable() {
187	<	public void run() {
188	<	try {
189	<	lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
190	<	threadShouldThrow();
191	<	} catch(InterruptedException success){}
192	<	}
193	<	});
194	<	try {
195	<	t.start();
196	<	t.interrupt();
197	<	t.join();
198	<	} catch(Exception e){
199	<	unexpectedException();
246	<	}
183	>	public void testConstructor() {
184	>	PublicReentrantReadWriteLock lock;
185	>
186	>	lock = new PublicReentrantReadWriteLock();
187	>	assertFalse(lock.isFair());
188	>	assertNotWriteLocked(lock);
189	>	assertEquals(0, lock.getReadLockCount());
190	>
191	>	lock = new PublicReentrantReadWriteLock(true);
192	>	assertTrue(lock.isFair());
193	>	assertNotWriteLocked(lock);
194	>	assertEquals(0, lock.getReadLockCount());
195	>
196	>	lock = new PublicReentrantReadWriteLock(false);
197	>	assertFalse(lock.isFair());
198	>	assertNotWriteLocked(lock);
199	>	assertEquals(0, lock.getReadLockCount());
200		}
201
249	–
202		/**
203	<	* write-trylock fails if locked
203	>	* write-locking and read-locking an unlocked lock succeed
204		*/
205	<	public void testWriteTryLockWhenLocked() {
206	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
207	<	lock.writeLock().lock();
208	<	Thread t = new Thread(new Runnable() {
209	<	public void run() {
210	<	threadAssertFalse(lock.writeLock().tryLock());
211	<	}
212	<	});
213	<	try {
214	<	t.start();
215	<	t.join();
216	<	lock.writeLock().unlock();
217	<	} catch(Exception e){
218	<	unexpectedException();
219	<	}
220	<	}
205	>	public void testLock()      { testLock(false); }
206	>	public void testLock_fair() { testLock(true); }
207	>	public void testLock(boolean fair) {
208	>	PublicReentrantReadWriteLock lock =
209	>	new PublicReentrantReadWriteLock(fair);
210	>	assertNotWriteLocked(lock);
211	>	lock.writeLock().lock();
212	>	assertWriteLockedByMoi(lock);
213	>	lock.writeLock().unlock();
214	>	assertNotWriteLocked(lock);
215	>	assertEquals(0, lock.getReadLockCount());
216	>	lock.readLock().lock();
217	>	assertNotWriteLocked(lock);
218	>	assertEquals(1, lock.getReadLockCount());
219	>	lock.readLock().unlock();
220	>	assertNotWriteLocked(lock);
221	>	assertEquals(0, lock.getReadLockCount());
222	>	}
223
224		/**
225	<	* read-trylock fails if locked
225	>	* getWriteHoldCount returns number of recursive holds
226		*/
227	<	public void testReadTryLockWhenLocked() {
228	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
229	<	lock.writeLock().lock();
230	<	Thread t = new Thread(new Runnable() {
231	<	public void run() {
232	<	threadAssertFalse(lock.readLock().tryLock());
233	<	}
234	<	});
235	<	try {
282	<	t.start();
283	<	t.join();
227	>	public void testGetWriteHoldCount()      { testGetWriteHoldCount(false); }
228	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
229	>	public void testGetWriteHoldCount(boolean fair) {
230	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
231	>	for (int i = 1; i <= SIZE; i++) {
232	>	lock.writeLock().lock();
233	>	assertEquals(i,lock.getWriteHoldCount());
234	>	}
235	>	for (int i = SIZE; i > 0; i--) {
236		lock.writeLock().unlock();
237	<	} catch(Exception e){
286	<	unexpectedException();
237	>	assertEquals(i-1,lock.getWriteHoldCount());
238		}
239	<	}
239	>	}
240
241		/**
242	<	* Multiple threads can hold a read lock when not write-locked
242	>	* writelock.getHoldCount returns number of recursive holds
243		*/
244	<	public void testMultipleReadLocks() {
245	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
246	<	lock.readLock().lock();
247	<	Thread t = new Thread(new Runnable() {
248	<	public void run() {
249	<	threadAssertTrue(lock.readLock().tryLock());
250	<	lock.readLock().unlock();
251	<	}
252	<	});
253	<	try {
254	<	t.start();
304	<	t.join();
305	<	lock.readLock().unlock();
306	<	} catch(Exception e){
307	<	unexpectedException();
244	>	public void testGetHoldCount()      { testGetHoldCount(false); }
245	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
246	>	public void testGetHoldCount(boolean fair) {
247	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
248	>	for (int i = 1; i <= SIZE; i++) {
249	>	lock.writeLock().lock();
250	>	assertEquals(i,lock.writeLock().getHoldCount());
251	>	}
252	>	for (int i = SIZE; i > 0; i--) {
253	>	lock.writeLock().unlock();
254	>	assertEquals(i-1,lock.writeLock().getHoldCount());
255		}
256	<	}
256	>	}
257
258		/**
259	<	* A writelock succeeds after reading threads unlock
259	>	* getReadHoldCount returns number of recursive holds
260		*/
261	<	public void testWriteAfterMultipleReadLocks() {
262	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
263	<	lock.readLock().lock();
264	<	Thread t1 = new Thread(new Runnable() {
265	<	public void run() {
266	<	lock.readLock().lock();
267	<	lock.readLock().unlock();
268	<	}
269	<	});
323	<	Thread t2 = new Thread(new Runnable() {
324	<	public void run() {
325	<	lock.writeLock().lock();
326	<	lock.writeLock().unlock();
327	<	}
328	<	});
329	<
330	<	try {
331	<	t1.start();
332	<	t2.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
261	>	public void testGetReadHoldCount()      { testGetReadHoldCount(false); }
262	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
263	>	public void testGetReadHoldCount(boolean fair) {
264	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
265	>	for (int i = 1; i <= SIZE; i++) {
266	>	lock.readLock().lock();
267	>	assertEquals(i,lock.getReadHoldCount());
268	>	}
269	>	for (int i = SIZE; i > 0; i--) {
270		lock.readLock().unlock();
271	<	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();
271	>	assertEquals(i-1,lock.getReadHoldCount());
272		}
273	<	}
273	>	}
274
275		/**
276	<	* Readlocks succeed after a writing thread unlocks
276	>	* write-unlocking an unlocked lock throws IllegalMonitorStateException
277		*/
278	<	public void testReadAfterWriteLock() {
279	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
280	<	lock.writeLock().lock();
281	<	Thread t1 = new Thread(new Runnable() {
352	<	public void run() {
353	<	lock.readLock().lock();
354	<	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	<
278	>	public void testWriteUnlock_IMSE()      { testWriteUnlock_IMSE(false); }
279	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
280	>	public void testWriteUnlock_IMSE(boolean fair) {
281	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
282		try {
365	–	t1.start();
366	–	t2.start();
367	–	Thread.sleep(SHORT_DELAY_MS);
283		lock.writeLock().unlock();
284	<	t1.join(MEDIUM_DELAY_MS);
285	<	t2.join(MEDIUM_DELAY_MS);
286	<	assertTrue(!t1.isAlive());
372	<	assertTrue(!t2.isAlive());
373	<
374	<	} catch(Exception e){
375	<	unexpectedException();
376	<	}
377	<	}
378	<
284	>	shouldThrow();
285	>	} catch (IllegalMonitorStateException success) {}
286	>	}
287
288		/**
289	<	* Read trylock succeeds if readlocked but not writelocked
289	>	* read-unlocking an unlocked lock throws IllegalMonitorStateException
290		*/
291	<	public void testTryLockWhenReadLocked() {
292	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
293	<	lock.readLock().lock();
294	<	Thread t = new Thread(new Runnable() {
387	<	public void run() {
388	<	threadAssertTrue(lock.readLock().tryLock());
389	<	lock.readLock().unlock();
390	<	}
391	<	});
291	>	public void testReadUnlock_IMSE()      { testReadUnlock_IMSE(false); }
292	>	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
293	>	public void testReadUnlock_IMSE(boolean fair) {
294	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
295		try {
393	–	t.start();
394	–	t.join();
296		lock.readLock().unlock();
297	<	} catch(Exception e){
298	<	unexpectedException();
299	<	}
399	<	}
400	<
401	<
297	>	shouldThrow();
298	>	} catch (IllegalMonitorStateException success) {}
299	>	}
300
301		/**
302	<	* write trylock fails when readlocked
302	>	* write-lockInterruptibly is interruptible
303		*/
304	<	public void testWriteTryLockWhenReadLocked() {
305	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
306	<	lock.readLock().lock();
307	<	Thread t = new Thread(new Runnable() {
308	<	public void run() {
309	<	threadAssertFalse(lock.writeLock().tryLock());
310	<	}
311	<	});
312	<	try {
313	<	t.start();
416	<	t.join();
417	<	lock.readLock().unlock();
418	<	} catch(Exception e){
419	<	unexpectedException();
420	<	}
421	<	}
304	>	public void testWriteLockInterruptibly_Interruptible()      { testWriteLockInterruptibly_Interruptible(false); }
305	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
306	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
307	>	final PublicReentrantReadWriteLock lock =
308	>	new PublicReentrantReadWriteLock(fair);
309	>	lock.writeLock().lock();
310	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311	>	public void realRun() throws InterruptedException {
312	>	lock.writeLock().lockInterruptibly();
313	>	}});
314
315	<
315	>	waitForQueuedThread(lock, t);
316	>	t.interrupt();
317	>	awaitTermination(t);
318	>	releaseWriteLock(lock);
319	>	}
320
321		/**
322	<	* write timed trylock times out if locked
323	<	*/
324	<	public void testWriteTryLock_Timeout() {
325	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
326	<	lock.writeLock().lock();
327	<	Thread t = new Thread(new Runnable() {
328	<	public void run() {
329	<	try {
330	<	threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
331	<	} catch (Exception ex) {
332	<	threadUnexpectedException();
333	<	}
334	<	}
335	<	});
336	<	try {
337	<	t.start();
338	<	t.join();
339	<	lock.writeLock().unlock();
444	<	} catch(Exception e){
445	<	unexpectedException();
446	<	}
447	<	}
322	>	* timed write-tryLock is interruptible
323	>	*/
324	>	public void testWriteTryLock_Interruptible()      { testWriteTryLock_Interruptible(false); }
325	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
326	>	public void testWriteTryLock_Interruptible(boolean fair) {
327	>	final PublicReentrantReadWriteLock lock =
328	>	new PublicReentrantReadWriteLock(fair);
329	>	lock.writeLock().lock();
330	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
331	>	public void realRun() throws InterruptedException {
332	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
333	>	}});
334	>
335	>	waitForQueuedThread(lock, t);
336	>	t.interrupt();
337	>	awaitTermination(t);
338	>	releaseWriteLock(lock);
339	>	}
340
341		/**
342	<	* read timed trylock times out if write-locked
342	>	* read-lockInterruptibly is interruptible
343		*/
344	<	public void testReadTryLock_Timeout() {
345	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
346	<	lock.writeLock().lock();
347	<	Thread t = new Thread(new Runnable() {
348	<	public void run() {
349	<	try {
350	<	threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
351	<	} catch (Exception ex) {
352	<	threadUnexpectedException();
353	<	}
354	<	}
355	<	});
356	<	try {
357	<	t.start();
358	<	t.join();
359	<	lock.writeLock().unlock();
360	<	} catch(Exception e){
361	<	unexpectedException();
362	<	}
363	<	}
344	>	public void testReadLockInterruptibly_Interruptible()      { testReadLockInterruptibly_Interruptible(false); }
345	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
346	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
347	>	final PublicReentrantReadWriteLock lock =
348	>	new PublicReentrantReadWriteLock(fair);
349	>	lock.writeLock().lock();
350	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
351	>	public void realRun() throws InterruptedException {
352	>	lock.readLock().lockInterruptibly();
353	>	}});
354	>
355	>	waitForQueuedThread(lock, t);
356	>	t.interrupt();
357	>	awaitTermination(t);
358	>	releaseWriteLock(lock);
359	>	}
360	>
361	>	/**
362	>	* timed read-tryLock is interruptible
363	>	*/
364	>	public void testReadTryLock_Interruptible()      { testReadTryLock_Interruptible(false); }
365	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
366	>	public void testReadTryLock_Interruptible(boolean fair) {
367	>	final PublicReentrantReadWriteLock lock =
368	>	new PublicReentrantReadWriteLock(fair);
369	>	lock.writeLock().lock();
370	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
371	>	public void realRun() throws InterruptedException {
372	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
373	>	}});
374	>
375	>	waitForQueuedThread(lock, t);
376	>	t.interrupt();
377	>	awaitTermination(t);
378	>	releaseWriteLock(lock);
379	>	}
380	>
381	>	/**
382	>	* write-tryLock on an unlocked lock succeeds
383	>	*/
384	>	public void testWriteTryLock()      { testWriteTryLock(false); }
385	>	public void testWriteTryLock_fair() { testWriteTryLock(true); }
386	>	public void testWriteTryLock(boolean fair) {
387	>	final PublicReentrantReadWriteLock lock =
388	>	new PublicReentrantReadWriteLock(fair);
389	>	assertTrue(lock.writeLock().tryLock());
390	>	assertWriteLockedByMoi(lock);
391	>	assertTrue(lock.writeLock().tryLock());
392	>	assertWriteLockedByMoi(lock);
393	>	lock.writeLock().unlock();
394	>	releaseWriteLock(lock);
395	>	}
396	>
397	>	/**
398	>	* write-tryLock fails if locked
399	>	*/
400	>	public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
401	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
402	>	public void testWriteTryLockWhenLocked(boolean fair) {
403	>	final PublicReentrantReadWriteLock lock =
404	>	new PublicReentrantReadWriteLock(fair);
405	>	lock.writeLock().lock();
406	>	Thread t = newStartedThread(new CheckedRunnable() {
407	>	public void realRun() {
408	>	assertFalse(lock.writeLock().tryLock());
409	>	}});
410	>
411	>	awaitTermination(t);
412	>	releaseWriteLock(lock);
413	>	}
414	>
415	>	/**
416	>	* read-tryLock fails if locked
417	>	*/
418	>	public void testReadTryLockWhenLocked()      { testReadTryLockWhenLocked(false); }
419	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
420	>	public void testReadTryLockWhenLocked(boolean fair) {
421	>	final PublicReentrantReadWriteLock lock =
422	>	new PublicReentrantReadWriteLock(fair);
423	>	lock.writeLock().lock();
424	>	Thread t = newStartedThread(new CheckedRunnable() {
425	>	public void realRun() {
426	>	assertFalse(lock.readLock().tryLock());
427	>	}});
428
429	+	awaitTermination(t);
430	+	releaseWriteLock(lock);
431	+	}
432
433		/**
434	<	* write lockInterruptibly succeeds if lock free else is interruptible
434	>	* Multiple threads can hold a read lock when not write-locked
435		*/
436	<	public void testWriteLockInterruptibly() {
437	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
438	<	try {
439	<	lock.writeLock().lockInterruptibly();
440	<	} catch(Exception e) {
441	<	unexpectedException();
442	<	}
443	<	Thread t = new Thread(new Runnable() {
444	<	public void run() {
445	<	try {
446	<	lock.writeLock().lockInterruptibly();
447	<	threadShouldThrow();
448	<	}
449	<	catch(InterruptedException success) {
450	<	}
451	<	}
452	<	});
436	>	public void testMultipleReadLocks()      { testMultipleReadLocks(false); }
437	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
438	>	public void testMultipleReadLocks(boolean fair) {
439	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
440	>	lock.readLock().lock();
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws InterruptedException {
443	>	assertTrue(lock.readLock().tryLock());
444	>	lock.readLock().unlock();
445	>	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
446	>	lock.readLock().unlock();
447	>	lock.readLock().lock();
448	>	lock.readLock().unlock();
449	>	}});
450	>
451	>	awaitTermination(t);
452	>	lock.readLock().unlock();
453	>	}
454	>
455	>	/**
456	>	* A writelock succeeds only after a reading thread unlocks
457	>	*/
458	>	public void testWriteAfterReadLock()      { testWriteAfterReadLock(false); }
459	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
460	>	public void testWriteAfterReadLock(boolean fair) {
461	>	final PublicReentrantReadWriteLock lock =
462	>	new PublicReentrantReadWriteLock(fair);
463	>	lock.readLock().lock();
464	>	Thread t = newStartedThread(new CheckedRunnable() {
465	>	public void realRun() {
466	>	assertEquals(1, lock.getReadLockCount());
467	>	lock.writeLock().lock();
468	>	assertEquals(0, lock.getReadLockCount());
469	>	lock.writeLock().unlock();
470	>	}});
471	>	waitForQueuedThread(lock, t);
472	>	assertNotWriteLocked(lock);
473	>	assertEquals(1, lock.getReadLockCount());
474	>	lock.readLock().unlock();
475	>	assertEquals(0, lock.getReadLockCount());
476	>	awaitTermination(t);
477	>	assertNotWriteLocked(lock);
478	>	}
479	>
480	>	/**
481	>	* A writelock succeeds only after reading threads unlock
482	>	*/
483	>	public void testWriteAfterMultipleReadLocks()      { testWriteAfterMultipleReadLocks(false); }
484	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
485	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
486	>	final PublicReentrantReadWriteLock lock =
487	>	new PublicReentrantReadWriteLock(fair);
488	>	lock.readLock().lock();
489	>	lock.readLock().lock();
490	>	Thread t1 = newStartedThread(new CheckedRunnable() {
491	>	public void realRun() {
492	>	lock.readLock().lock();
493	>	assertEquals(3, lock.getReadLockCount());
494	>	lock.readLock().unlock();
495	>	}});
496	>	awaitTermination(t1);
497	>
498	>	Thread t2 = newStartedThread(new CheckedRunnable() {
499	>	public void realRun() {
500	>	assertEquals(2, lock.getReadLockCount());
501	>	lock.writeLock().lock();
502	>	assertEquals(0, lock.getReadLockCount());
503	>	lock.writeLock().unlock();
504	>	}});
505	>	waitForQueuedThread(lock, t2);
506	>	assertNotWriteLocked(lock);
507	>	assertEquals(2, lock.getReadLockCount());
508	>	lock.readLock().unlock();
509	>	lock.readLock().unlock();
510	>	assertEquals(0, lock.getReadLockCount());
511	>	awaitTermination(t2);
512	>	assertNotWriteLocked(lock);
513	>	}
514	>
515	>	/**
516	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
517	>	* will block if there is a waiting writer thread
518	>	*/
519	>	public void testReaderWriterReaderFairFifo() {
520	>	final PublicReentrantReadWriteLock lock =
521	>	new PublicReentrantReadWriteLock(true);
522	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
523	>
524	>	lock.readLock().lock();
525	>	Thread t1 = newStartedThread(new CheckedRunnable() {
526	>	public void realRun() {
527	>	assertEquals(1, lock.getReadLockCount());
528	>	lock.writeLock().lock();
529	>	assertEquals(0, lock.getReadLockCount());
530	>	t1GotLock.set(true);
531	>	lock.writeLock().unlock();
532	>	}});
533	>	waitForQueuedThread(lock, t1);
534	>
535	>	Thread t2 = newStartedThread(new CheckedRunnable() {
536	>	public void realRun() {
537	>	assertEquals(1, lock.getReadLockCount());
538	>	lock.readLock().lock();
539	>	assertEquals(1, lock.getReadLockCount());
540	>	assertTrue(t1GotLock.get());
541	>	lock.readLock().unlock();
542	>	}});
543	>	waitForQueuedThread(lock, t2);
544	>	assertTrue(t1.isAlive());
545	>	assertNotWriteLocked(lock);
546	>	assertEquals(1, lock.getReadLockCount());
547	>	lock.readLock().unlock();
548	>	awaitTermination(t1);
549	>	awaitTermination(t2);
550	>	assertNotWriteLocked(lock);
551	>	}
552	>
553	>	/**
554	>	* Readlocks succeed only after a writing thread unlocks
555	>	*/
556	>	public void testReadAfterWriteLock()      { testReadAfterWriteLock(false); }
557	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
558	>	public void testReadAfterWriteLock(boolean fair) {
559	>	final PublicReentrantReadWriteLock lock =
560	>	new PublicReentrantReadWriteLock(fair);
561	>	lock.writeLock().lock();
562	>	Thread t1 = newStartedThread(new CheckedRunnable() {
563	>	public void realRun() {
564	>	lock.readLock().lock();
565	>	lock.readLock().unlock();
566	>	}});
567	>	Thread t2 = newStartedThread(new CheckedRunnable() {
568	>	public void realRun() {
569	>	lock.readLock().lock();
570	>	lock.readLock().unlock();
571	>	}});
572	>
573	>	waitForQueuedThread(lock, t1);
574	>	waitForQueuedThread(lock, t2);
575	>	releaseWriteLock(lock);
576	>	awaitTermination(t1);
577	>	awaitTermination(t2);
578	>	}
579	>
580	>	/**
581	>	* Read trylock succeeds if write locked by current thread
582	>	*/
583	>	public void testReadHoldingWriteLock()      { testReadHoldingWriteLock(false); }
584	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
585	>	public void testReadHoldingWriteLock(boolean fair) {
586	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
587	>	lock.writeLock().lock();
588	>	assertTrue(lock.readLock().tryLock());
589	>	lock.readLock().unlock();
590	>	lock.writeLock().unlock();
591	>	}
592	>
593	>	/**
594	>	* Read trylock succeeds (barging) even in the presence of waiting
595	>	* readers and/or writers
596	>	*/
597	>	public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
598	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
599	>	public void testReadTryLockBarging(boolean fair) {
600	>	final PublicReentrantReadWriteLock lock =
601	>	new PublicReentrantReadWriteLock(fair);
602	>	lock.readLock().lock();
603	>
604	>	Thread t1 = newStartedThread(new CheckedRunnable() {
605	>	public void realRun() {
606	>	lock.writeLock().lock();
607	>	lock.writeLock().unlock();
608	>	}});
609	>
610	>	waitForQueuedThread(lock, t1);
611	>
612	>	Thread t2 = newStartedThread(new CheckedRunnable() {
613	>	public void realRun() {
614	>	lock.readLock().lock();
615	>	lock.readLock().unlock();
616	>	}});
617	>
618	>	if (fair)
619	>	waitForQueuedThread(lock, t2);
620	>
621	>	Thread t3 = newStartedThread(new CheckedRunnable() {
622	>	public void realRun() {
623	>	lock.readLock().tryLock();
624	>	lock.readLock().unlock();
625	>	}});
626	>
627	>	assertTrue(lock.getReadLockCount() > 0);
628	>	awaitTermination(t3);
629	>	assertTrue(t1.isAlive());
630	>	if (fair) assertTrue(t2.isAlive());
631	>	lock.readLock().unlock();
632	>	awaitTermination(t1);
633	>	awaitTermination(t2);
634	>	}
635	>
636	>	/**
637	>	* Read lock succeeds if write locked by current thread even if
638	>	* other threads are waiting for readlock
639	>	*/
640	>	public void testReadHoldingWriteLock2()      { testReadHoldingWriteLock2(false); }
641	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
642	>	public void testReadHoldingWriteLock2(boolean fair) {
643	>	final PublicReentrantReadWriteLock lock =
644	>	new PublicReentrantReadWriteLock(fair);
645	>	lock.writeLock().lock();
646	>	lock.readLock().lock();
647	>	lock.readLock().unlock();
648	>
649	>	Thread t1 = newStartedThread(new CheckedRunnable() {
650	>	public void realRun() {
651	>	lock.readLock().lock();
652	>	lock.readLock().unlock();
653	>	}});
654	>	Thread t2 = newStartedThread(new CheckedRunnable() {
655	>	public void realRun() {
656	>	lock.readLock().lock();
657	>	lock.readLock().unlock();
658	>	}});
659	>
660	>	waitForQueuedThread(lock, t1);
661	>	waitForQueuedThread(lock, t2);
662	>	assertWriteLockedByMoi(lock);
663	>	lock.readLock().lock();
664	>	lock.readLock().unlock();
665	>	releaseWriteLock(lock);
666	>	awaitTermination(t1);
667	>	awaitTermination(t2);
668	>	}
669	>
670	>	/**
671	>	* Read lock succeeds if write locked by current thread even if
672	>	* other threads are waiting for writelock
673	>	*/
674	>	public void testReadHoldingWriteLock3()      { testReadHoldingWriteLock3(false); }
675	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
676	>	public void testReadHoldingWriteLock3(boolean fair) {
677	>	final PublicReentrantReadWriteLock lock =
678	>	new PublicReentrantReadWriteLock(fair);
679	>	lock.writeLock().lock();
680	>	lock.readLock().lock();
681	>	lock.readLock().unlock();
682	>
683	>	Thread t1 = newStartedThread(new CheckedRunnable() {
684	>	public void realRun() {
685	>	lock.writeLock().lock();
686	>	lock.writeLock().unlock();
687	>	}});
688	>	Thread t2 = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() {
690	>	lock.writeLock().lock();
691	>	lock.writeLock().unlock();
692	>	}});
693	>
694	>	waitForQueuedThread(lock, t1);
695	>	waitForQueuedThread(lock, t2);
696	>	assertWriteLockedByMoi(lock);
697	>	lock.readLock().lock();
698	>	lock.readLock().unlock();
699	>	assertWriteLockedByMoi(lock);
700	>	lock.writeLock().unlock();
701	>	awaitTermination(t1);
702	>	awaitTermination(t2);
703	>	}
704	>
705	>	/**
706	>	* Write lock succeeds if write locked by current thread even if
707	>	* other threads are waiting for writelock
708	>	*/
709	>	public void testWriteHoldingWriteLock4()      { testWriteHoldingWriteLock4(false); }
710	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
711	>	public void testWriteHoldingWriteLock4(boolean fair) {
712	>	final PublicReentrantReadWriteLock lock =
713	>	new PublicReentrantReadWriteLock(fair);
714	>	lock.writeLock().lock();
715	>	lock.writeLock().lock();
716	>	lock.writeLock().unlock();
717	>
718	>	Thread t1 = newStartedThread(new CheckedRunnable() {
719	>	public void realRun() {
720	>	lock.writeLock().lock();
721	>	lock.writeLock().unlock();
722	>	}});
723	>	Thread t2 = newStartedThread(new CheckedRunnable() {
724	>	public void realRun() {
725	>	lock.writeLock().lock();
726	>	lock.writeLock().unlock();
727	>	}});
728	>
729	>	waitForQueuedThread(lock, t1);
730	>	waitForQueuedThread(lock, t2);
731	>	assertWriteLockedByMoi(lock);
732	>	assertEquals(1, lock.getWriteHoldCount());
733	>	lock.writeLock().lock();
734	>	assertWriteLockedByMoi(lock);
735	>	assertEquals(2, lock.getWriteHoldCount());
736	>	lock.writeLock().unlock();
737	>	assertWriteLockedByMoi(lock);
738	>	assertEquals(1, lock.getWriteHoldCount());
739	>	lock.writeLock().unlock();
740	>	awaitTermination(t1);
741	>	awaitTermination(t2);
742	>	}
743	>
744	>	/**
745	>	* Read tryLock succeeds if readlocked but not writelocked
746	>	*/
747	>	public void testTryLockWhenReadLocked()      { testTryLockWhenReadLocked(false); }
748	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
749	>	public void testTryLockWhenReadLocked(boolean fair) {
750	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
751	>	lock.readLock().lock();
752	>	Thread t = newStartedThread(new CheckedRunnable() {
753	>	public void realRun() {
754	>	assertTrue(lock.readLock().tryLock());
755	>	lock.readLock().unlock();
756	>	}});
757	>
758	>	awaitTermination(t);
759	>	lock.readLock().unlock();
760	>	}
761	>
762	>	/**
763	>	* write tryLock fails when readlocked
764	>	*/
765	>	public void testWriteTryLockWhenReadLocked()      { testWriteTryLockWhenReadLocked(false); }
766	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
767	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
768	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
769	>	lock.readLock().lock();
770	>	Thread t = newStartedThread(new CheckedRunnable() {
771	>	public void realRun() {
772	>	assertFalse(lock.writeLock().tryLock());
773	>	}});
774	>
775	>	awaitTermination(t);
776	>	lock.readLock().unlock();
777	>	}
778	>
779	>	/**
780	>	* write timed tryLock times out if locked
781	>	*/
782	>	public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
783	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
784	>	public void testWriteTryLock_Timeout(boolean fair) {
785	>	final PublicReentrantReadWriteLock lock =
786	>	new PublicReentrantReadWriteLock(fair);
787	>	lock.writeLock().lock();
788	>	Thread t = newStartedThread(new CheckedRunnable() {
789	>	public void realRun() throws InterruptedException {
790	>	long startTime = System.nanoTime();
791	>	long timeoutMillis = 10;
792	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
793	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
794	>	}});
795	>
796	>	awaitTermination(t);
797	>	releaseWriteLock(lock);
798	>	}
799	>
800	>	/**
801	>	* read timed tryLock times out if write-locked
802	>	*/
803	>	public void testReadTryLock_Timeout()      { testReadTryLock_Timeout(false); }
804	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
805	>	public void testReadTryLock_Timeout(boolean fair) {
806	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
807	>	lock.writeLock().lock();
808	>	Thread t = newStartedThread(new CheckedRunnable() {
809	>	public void realRun() throws InterruptedException {
810	>	long startTime = System.nanoTime();
811	>	long timeoutMillis = 10;
812	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
813	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
814	>	}});
815	>
816	>	awaitTermination(t);
817	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
818	>	lock.writeLock().unlock();
819	>	}
820	>
821	>	/**
822	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
823	>	*/
824	>	public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
825	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
826	>	public void testWriteLockInterruptibly(boolean fair) {
827	>	final PublicReentrantReadWriteLock lock =
828	>	new PublicReentrantReadWriteLock(fair);
829		try {
830	<	t.start();
831	<	t.interrupt();
832	<	t.join();
498	<	lock.writeLock().unlock();
499	<	} catch(Exception e){
500	<	unexpectedException();
830	>	lock.writeLock().lockInterruptibly();
831	>	} catch (InterruptedException ie) {
832	>	threadUnexpectedException(ie);
833		}
834	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
835	+	public void realRun() throws InterruptedException {
836	+	lock.writeLock().lockInterruptibly();
837	+	}});
838	+
839	+	waitForQueuedThread(lock, t);
840	+	t.interrupt();
841	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
842	+	awaitTermination(t);
843	+	releaseWriteLock(lock);
844		}
845
846		/**
847	<	*  read lockInterruptibly succeeds if lock free else is interruptible
847	>	* read lockInterruptibly succeeds if lock free else is interruptible
848		*/
849	<	public void testReadLockInterruptibly() {
850	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
851	<	try {
852	<	lock.writeLock().lockInterruptibly();
853	<	} catch(Exception e) {
512	<	unexpectedException();
513	<	}
514	<	Thread t = new Thread(new Runnable() {
515	<	public void run() {
516	<	try {
517	<	lock.readLock().lockInterruptibly();
518	<	threadShouldThrow();
519	<	}
520	<	catch(InterruptedException success) {
521	<	}
522	<	}
523	<	});
849	>	public void testReadLockInterruptibly()      { testReadLockInterruptibly(false); }
850	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
851	>	public void testReadLockInterruptibly(boolean fair) {
852	>	final PublicReentrantReadWriteLock lock =
853	>	new PublicReentrantReadWriteLock(fair);
854		try {
855	<	t.start();
856	<	t.interrupt();
857	<	t.join();
858	<	lock.writeLock().unlock();
859	<	} catch(Exception e){
530	<	unexpectedException();
855	>	lock.readLock().lockInterruptibly();
856	>	lock.readLock().unlock();
857	>	lock.writeLock().lockInterruptibly();
858	>	} catch (InterruptedException ie) {
859	>	threadUnexpectedException(ie);
860		}
861	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
862	+	public void realRun() throws InterruptedException {
863	+	lock.readLock().lockInterruptibly();
864	+	}});
865	+
866	+	waitForQueuedThread(lock, t);
867	+	t.interrupt();
868	+	awaitTermination(t);
869	+	releaseWriteLock(lock);
870		}
871
872		/**
873		* Calling await without holding lock throws IllegalMonitorStateException
874		*/
875	<	public void testAwait_IllegalMonitor() {
876	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
875	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
876	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
877	>	public void testAwait_IMSE(boolean fair) {
878	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
879		final Condition c = lock.writeLock().newCondition();
880	<	try {
881	<	c.await();
882	<	shouldThrow();
883	<	}
884	<	catch (IllegalMonitorStateException success) {
885	<	}
886	<	catch (Exception ex) {
887	<	shouldThrow();
880	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
881	>	long startTime = System.nanoTime();
882	>	try {
883	>	await(c, awaitMethod);
884	>	shouldThrow();
885	>	} catch (IllegalMonitorStateException success) {
886	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
887	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
888		}
889		}
890
891		/**
892		* Calling signal without holding lock throws IllegalMonitorStateException
893		*/
894	<	public void testSignal_IllegalMonitor() {
895	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
894	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
895	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
896	>	public void testSignal_IMSE(boolean fair) {
897	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
898		final Condition c = lock.writeLock().newCondition();
899		try {
900		c.signal();
901		shouldThrow();
902	<	}
561	<	catch (IllegalMonitorStateException success) {
562	<	}
563	<	catch (Exception ex) {
564	<	unexpectedException();
565	<	}
902	>	} catch (IllegalMonitorStateException success) {}
903		}
904
905		/**
906	<	* awaitNanos without a signal times out
906	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
907		*/
908	<	public void testAwaitNanos_Timeout() {
909	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
908	>	public void testSignalAll_IMSE()      { testSignalAll_IMSE(false); }
909	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
910	>	public void testSignalAll_IMSE(boolean fair) {
911	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
912		final Condition c = lock.writeLock().newCondition();
913		try {
914	+	c.signalAll();
915	+	shouldThrow();
916	+	} catch (IllegalMonitorStateException success) {}
917	+	}
918	+
919	+	/**
920	+	* awaitNanos without a signal times out
921	+	*/
922	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
923	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
924	+	public void testAwaitNanos_Timeout(boolean fair) {
925	+	try {
926	+	final ReentrantReadWriteLock lock =
927	+	new ReentrantReadWriteLock(fair);
928	+	final Condition c = lock.writeLock().newCondition();
929		lock.writeLock().lock();
930	<	long t = c.awaitNanos(100);
931	<	assertTrue(t <= 0);
930	>	long startTime = System.nanoTime();
931	>	long timeoutMillis = 10;
932	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
933	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
934	>	assertTrue(nanosRemaining <= 0);
935	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
936		lock.writeLock().unlock();
937	<	}
938	<	catch (Exception ex) {
581	<	unexpectedException();
937	>	} catch (InterruptedException e) {
938	>	threadUnexpectedException(e);
939		}
940		}
941
585	–
942		/**
943	<	*  timed await without a signal times out
943	>	* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
947	<	final Condition c = lock.writeLock().newCondition();
945	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
946	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
947	>	public void testAwait_Timeout(boolean fair) {
948		try {
949	+	final ReentrantReadWriteLock lock =
950	+	new ReentrantReadWriteLock(fair);
951	+	final Condition c = lock.writeLock().newCondition();
952		lock.writeLock().lock();
953	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
953	>	long startTime = System.nanoTime();
954	>	long timeoutMillis = 10;
955	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
956	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957		lock.writeLock().unlock();
958	<	}
959	<	catch (Exception ex) {
598	<	unexpectedException();
958	>	} catch (InterruptedException e) {
959	>	threadUnexpectedException(e);
960		}
961		}
962
963		/**
964		* awaitUntil without a signal times out
965		*/
966	<	public void testAwaitUntil_Timeout() {
967	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
968	<	final Condition c = lock.writeLock().newCondition();
969	<	try {
966	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
967	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
968	>	public void testAwaitUntil_Timeout(boolean fair) {
969	>	try {
970	>	final ReentrantReadWriteLock lock =
971	>	new ReentrantReadWriteLock(fair);
972	>	final Condition c = lock.writeLock().newCondition();
973		lock.writeLock().lock();
974	+	long startTime = System.nanoTime();
975	+	long timeoutMillis = 10;
976		java.util.Date d = new java.util.Date();
977	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
977	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
978	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
979		lock.writeLock().unlock();
980	<	}
981	<	catch (Exception ex) {
615	<	unexpectedException();
980	>	} catch (InterruptedException e) {
981	>	threadUnexpectedException(e);
982		}
983		}
984
985		/**
986		* await returns when signalled
987		*/
988	<	public void testAwait() {
989	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
988	>	public void testAwait()      { testAwait(false); }
989	>	public void testAwait_fair() { testAwait(true); }
990	>	public void testAwait(boolean fair) {
991	>	final PublicReentrantReadWriteLock lock =
992	>	new PublicReentrantReadWriteLock(fair);
993		final Condition c = lock.writeLock().newCondition();
994	<	Thread t = new Thread(new Runnable() {
995	<	public void run() {
996	<	try {
997	<	lock.writeLock().lock();
998	<	c.await();
999	<	lock.writeLock().unlock();
1000	<	}
1001	<	catch(InterruptedException e) {
1002	<	threadUnexpectedException();
1003	<	}
1004	<	}
1005	<	});
1006	<
1007	<	try {
1008	<	t.start();
1009	<	Thread.sleep(SHORT_DELAY_MS);
1010	<	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	<	}
994	>	final CountDownLatch locked = new CountDownLatch(1);
995	>	Thread t = newStartedThread(new CheckedRunnable() {
996	>	public void realRun() throws InterruptedException {
997	>	lock.writeLock().lock();
998	>	locked.countDown();
999	>	c.await();
1000	>	lock.writeLock().unlock();
1001	>	}});
1002	>
1003	>	await(locked);
1004	>	lock.writeLock().lock();
1005	>	assertHasWaiters(lock, c, t);
1006	>	c.signal();
1007	>	assertHasNoWaiters(lock, c);
1008	>	assertTrue(t.isAlive());
1009	>	lock.writeLock().unlock();
1010	>	awaitTermination(t);
1011		}
1012
1013		/**
1014	<	* awaitUninterruptibly doesn't abort on interrupt
1015	<	*/
1016	<	public void testAwaitUninterruptibly() {
1017	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1014	>	* awaitUninterruptibly is uninterruptible
1015	>	*/
1016	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1017	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1018	>	public void testAwaitUninterruptibly(boolean fair) {
1019	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1020		final Condition c = lock.writeLock().newCondition();
1021	<	Thread t = new Thread(new Runnable() {
659	<	public void run() {
660	<	lock.writeLock().lock();
661	<	c.awaitUninterruptibly();
662	<	lock.writeLock().unlock();
663	<	}
664	<	});
1021	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1022
1023	<	try {
1024	<	t.start();
1025	<	Thread.sleep(SHORT_DELAY_MS);
1026	<	t.interrupt();
1027	<	lock.writeLock().lock();
1028	<	c.signal();
1029	<	lock.writeLock().unlock();
1030	<	assert(t.isInterrupted());
1031	<	t.join(SHORT_DELAY_MS);
1032	<	assertFalse(t.isAlive());
1033	<	}
1034	<	catch (Exception ex) {
1035	<	unexpectedException();
1036	<	}
1023	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1024	>	public void realRun() {
1025	>	// Interrupt before awaitUninterruptibly
1026	>	lock.writeLock().lock();
1027	>	pleaseInterrupt.countDown();
1028	>	Thread.currentThread().interrupt();
1029	>	c.awaitUninterruptibly();
1030	>	assertTrue(Thread.interrupted());
1031	>	lock.writeLock().unlock();
1032	>	}});
1033	>
1034	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1035	>	public void realRun() {
1036	>	// Interrupt during awaitUninterruptibly
1037	>	lock.writeLock().lock();
1038	>	pleaseInterrupt.countDown();
1039	>	c.awaitUninterruptibly();
1040	>	assertTrue(Thread.interrupted());
1041	>	lock.writeLock().unlock();
1042	>	}});
1043	>
1044	>	await(pleaseInterrupt);
1045	>	lock.writeLock().lock();
1046	>	lock.writeLock().unlock();
1047	>	t2.interrupt();
1048	>
1049	>	assertThreadStaysAlive(t1);
1050	>	assertTrue(t2.isAlive());
1051	>
1052	>	lock.writeLock().lock();
1053	>	c.signalAll();
1054	>	lock.writeLock().unlock();
1055	>
1056	>	awaitTermination(t1);
1057	>	awaitTermination(t2);
1058		}
1059
1060		/**
1061	<	* await is interruptible
1062	<	*/
1063	<	public void testAwait_Interrupt() {
1064	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1061	>	* await/awaitNanos/awaitUntil is interruptible
1062	>	*/
1063	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1064	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1065	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1066	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1067	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1068	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1069	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
1070	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
1071	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1072	>	final PublicReentrantReadWriteLock lock =
1073	>	new PublicReentrantReadWriteLock(fair);
1074		final Condition c = lock.writeLock().newCondition();
1075	<	Thread t = new Thread(new Runnable() {
1076	<	public void run() {
1077	<	try {
1078	<	lock.writeLock().lock();
1079	<	c.await();
1080	<	lock.writeLock().unlock();
1081	<	threadShouldThrow();
1082	<	}
1083	<	catch(InterruptedException success) {
1084	<	}
1085	<	}
1086	<	});
1087	<
1088	<	try {
1089	<	t.start();
1090	<	Thread.sleep(SHORT_DELAY_MS);
1091	<	t.interrupt();
1092	<	t.join(SHORT_DELAY_MS);
1093	<	assertFalse(t.isAlive());
1094	<	}
1095	<	catch (Exception ex) {
1096	<	unexpectedException();
710	<	}
1075	>	final CountDownLatch locked = new CountDownLatch(1);
1076	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1077	>	public void realRun() throws InterruptedException {
1078	>	lock.writeLock().lock();
1079	>	assertWriteLockedByMoi(lock);
1080	>	assertHasNoWaiters(lock, c);
1081	>	locked.countDown();
1082	>	try {
1083	>	await(c, awaitMethod);
1084	>	} finally {
1085	>	assertWriteLockedByMoi(lock);
1086	>	assertHasNoWaiters(lock, c);
1087	>	lock.writeLock().unlock();
1088	>	assertFalse(Thread.interrupted());
1089	>	}
1090	>	}});
1091	>
1092	>	await(locked);
1093	>	assertHasWaiters(lock, c, t);
1094	>	t.interrupt();
1095	>	awaitTermination(t);
1096	>	assertNotWriteLocked(lock);
1097		}
1098
1099		/**
1100	<	* awaitNanos is interruptible
1100	>	* signalAll wakes up all threads
1101		*/
1102	<	public void testAwaitNanos_Interrupt() {
1103	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1102	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1103	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1104	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1105	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1106	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1107	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1108	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
1109	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
1110	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1111	>	final PublicReentrantReadWriteLock lock =
1112	>	new PublicReentrantReadWriteLock(fair);
1113		final Condition c = lock.writeLock().newCondition();
1114	<	Thread t = new Thread(new Runnable() {
1115	<	public void run() {
1116	<	try {
1117	<	lock.writeLock().lock();
1118	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
1119	<	lock.writeLock().unlock();
1120	<	threadShouldThrow();
1121	<	}
1122	<	catch(InterruptedException success) {
1123	<	}
1124	<	}
1125	<	});
1126	<
1127	<	try {
1128	<	t.start();
1129	<	Thread.sleep(SHORT_DELAY_MS);
1130	<	t.interrupt();
1131	<	t.join(SHORT_DELAY_MS);
1132	<	assertFalse(t.isAlive());
1133	<	}
1134	<	catch (Exception ex) {
1135	<	unexpectedException();
741	<	}
1114	>	final CountDownLatch locked = new CountDownLatch(2);
1115	>	final Lock writeLock = lock.writeLock();
1116	>	class Awaiter extends CheckedRunnable {
1117	>	public void realRun() throws InterruptedException {
1118	>	writeLock.lock();
1119	>	locked.countDown();
1120	>	await(c, awaitMethod);
1121	>	writeLock.unlock();
1122	>	}
1123	>	}
1124	>
1125	>	Thread t1 = newStartedThread(new Awaiter());
1126	>	Thread t2 = newStartedThread(new Awaiter());
1127	>
1128	>	await(locked);
1129	>	writeLock.lock();
1130	>	assertHasWaiters(lock, c, t1, t2);
1131	>	c.signalAll();
1132	>	assertHasNoWaiters(lock, c);
1133	>	writeLock.unlock();
1134	>	awaitTermination(t1);
1135	>	awaitTermination(t2);
1136		}
1137
1138		/**
1139	<	* awaitUntil is interruptible
1140	<	*/
1141	<	public void testAwaitUntil_Interrupt() {
1142	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1139	>	* signal wakes up waiting threads in FIFO order
1140	>	*/
1141	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1142	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1143	>	public void testSignalWakesFifo(boolean fair) {
1144	>	final PublicReentrantReadWriteLock lock =
1145	>	new PublicReentrantReadWriteLock(fair);
1146		final Condition c = lock.writeLock().newCondition();
1147	<	Thread t = new Thread(new Runnable() {
1148	<	public void run() {
1149	<	try {
1150	<	lock.writeLock().lock();
1151	<	java.util.Date d = new java.util.Date();
1152	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1153	<	lock.writeLock().unlock();
1154	<	threadShouldThrow();
1155	<	}
1156	<	catch(InterruptedException success) {
1157	<	}
1158	<	}
1159	<	});
1160	<
1161	<	try {
1162	<	t.start();
1163	<	Thread.sleep(SHORT_DELAY_MS);
1164	<	t.interrupt();
1165	<	t.join(SHORT_DELAY_MS);
1166	<	assertFalse(t.isAlive());
1167	<	}
1168	<	catch (Exception ex) {
1169	<	unexpectedException();
1170	<	}
1147	>	final CountDownLatch locked1 = new CountDownLatch(1);
1148	>	final CountDownLatch locked2 = new CountDownLatch(1);
1149	>	final Lock writeLock = lock.writeLock();
1150	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1151	>	public void realRun() throws InterruptedException {
1152	>	writeLock.lock();
1153	>	locked1.countDown();
1154	>	c.await();
1155	>	writeLock.unlock();
1156	>	}});
1157	>
1158	>	await(locked1);
1159	>
1160	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1161	>	public void realRun() throws InterruptedException {
1162	>	writeLock.lock();
1163	>	locked2.countDown();
1164	>	c.await();
1165	>	writeLock.unlock();
1166	>	}});
1167	>
1168	>	await(locked2);
1169	>
1170	>	writeLock.lock();
1171	>	assertHasWaiters(lock, c, t1, t2);
1172	>	assertFalse(lock.hasQueuedThreads());
1173	>	c.signal();
1174	>	assertHasWaiters(lock, c, t2);
1175	>	assertTrue(lock.hasQueuedThread(t1));
1176	>	assertFalse(lock.hasQueuedThread(t2));
1177	>	c.signal();
1178	>	assertHasNoWaiters(lock, c);
1179	>	assertTrue(lock.hasQueuedThread(t1));
1180	>	assertTrue(lock.hasQueuedThread(t2));
1181	>	writeLock.unlock();
1182	>	awaitTermination(t1);
1183	>	awaitTermination(t2);
1184		}
1185
1186		/**
1187	<	* signalAll wakes up all threads
1188	<	*/
1189	<	public void testSignalAll() {
1190	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1187	>	* await after multiple reentrant locking preserves lock count
1188	>	*/
1189	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1190	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1191	>	public void testAwaitLockCount(boolean fair) {
1192	>	final PublicReentrantReadWriteLock lock =
1193	>	new PublicReentrantReadWriteLock(fair);
1194		final Condition c = lock.writeLock().newCondition();
1195	<	Thread t1 = new Thread(new Runnable() {
1196	<	public void run() {
1197	<	try {
1198	<	lock.writeLock().lock();
1199	<	c.await();
1200	<	lock.writeLock().unlock();
1201	<	}
1202	<	catch(InterruptedException e) {
1203	<	threadUnexpectedException();
1204	<	}
1205	<	}
1206	<	});
1207	<
1208	<	Thread t2 = new Thread(new Runnable() {
1209	<	public void run() {
1210	<	try {
1211	<	lock.writeLock().lock();
1212	<	c.await();
1213	<	lock.writeLock().unlock();
1214	<	}
1215	<	catch(InterruptedException e) {
1216	<	threadUnexpectedException();
1217	<	}
1218	<	}
1219	<	});
1220	<
1221	<	try {
1222	<	t1.start();
1223	<	t2.start();
1224	<	Thread.sleep(SHORT_DELAY_MS);
1225	<	lock.writeLock().lock();
1226	<	c.signalAll();
1227	<	lock.writeLock().unlock();
1228	<	t1.join(SHORT_DELAY_MS);
1229	<	t2.join(SHORT_DELAY_MS);
817	<	assertFalse(t1.isAlive());
818	<	assertFalse(t2.isAlive());
819	<	}
820	<	catch (Exception ex) {
821	<	unexpectedException();
822	<	}
1195	>	final CountDownLatch locked = new CountDownLatch(2);
1196	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1197	>	public void realRun() throws InterruptedException {
1198	>	lock.writeLock().lock();
1199	>	assertWriteLockedByMoi(lock);
1200	>	assertEquals(1, lock.writeLock().getHoldCount());
1201	>	locked.countDown();
1202	>	c.await();
1203	>	assertWriteLockedByMoi(lock);
1204	>	assertEquals(1, lock.writeLock().getHoldCount());
1205	>	lock.writeLock().unlock();
1206	>	}});
1207	>
1208	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1209	>	public void realRun() throws InterruptedException {
1210	>	lock.writeLock().lock();
1211	>	lock.writeLock().lock();
1212	>	assertWriteLockedByMoi(lock);
1213	>	assertEquals(2, lock.writeLock().getHoldCount());
1214	>	locked.countDown();
1215	>	c.await();
1216	>	assertWriteLockedByMoi(lock);
1217	>	assertEquals(2, lock.writeLock().getHoldCount());
1218	>	lock.writeLock().unlock();
1219	>	lock.writeLock().unlock();
1220	>	}});
1221	>
1222	>	await(locked);
1223	>	lock.writeLock().lock();
1224	>	assertHasWaiters(lock, c, t1, t2);
1225	>	c.signalAll();
1226	>	assertHasNoWaiters(lock, c);
1227	>	lock.writeLock().unlock();
1228	>	awaitTermination(t1);
1229	>	awaitTermination(t2);
1230		}
1231
1232		/**
1233		* A serialized lock deserializes as unlocked
1234		*/
1235	<	public void testSerialization() {
1236	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1237	<	l.readLock().lock();
1238	<	l.readLock().unlock();
1239	<
1240	<	try {
1241	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1242	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1243	<	out.writeObject(l);
1244	<	out.close();
1245	<
1246	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1247	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1248	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1249	<	r.readLock().lock();
1250	<	r.readLock().unlock();
1251	<	} catch(Exception e){
1252	<	e.printStackTrace();
1253	<	unexpectedException();
1254	<	}
1235	>	public void testSerialization()      { testSerialization(false); }
1236	>	public void testSerialization_fair() { testSerialization(true); }
1237	>	public void testSerialization(boolean fair) {
1238	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1239	>	lock.writeLock().lock();
1240	>	lock.readLock().lock();
1241	>
1242	>	ReentrantReadWriteLock clone = serialClone(lock);
1243	>	assertEquals(lock.isFair(), clone.isFair());
1244	>	assertTrue(lock.isWriteLocked());
1245	>	assertFalse(clone.isWriteLocked());
1246	>	assertEquals(1, lock.getReadLockCount());
1247	>	assertEquals(0, clone.getReadLockCount());
1248	>	clone.writeLock().lock();
1249	>	clone.readLock().lock();
1250	>	assertTrue(clone.isWriteLocked());
1251	>	assertEquals(1, clone.getReadLockCount());
1252	>	clone.readLock().unlock();
1253	>	clone.writeLock().unlock();
1254	>	assertFalse(clone.isWriteLocked());
1255	>	assertEquals(1, lock.getReadLockCount());
1256	>	assertEquals(0, clone.getReadLockCount());
1257		}
1258
1259		/**
1260		* hasQueuedThreads reports whether there are waiting threads
1261		*/
1262	<	public void testhasQueuedThreads() {
1263	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1262	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
1263	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1264	>	public void testHasQueuedThreads(boolean fair) {
1265	>	final PublicReentrantReadWriteLock lock =
1266	>	new PublicReentrantReadWriteLock(fair);
1267		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1268		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1269	+	assertFalse(lock.hasQueuedThreads());
1270	+	lock.writeLock().lock();
1271	+	assertFalse(lock.hasQueuedThreads());
1272	+	t1.start();
1273	+	waitForQueuedThread(lock, t1);
1274	+	assertTrue(lock.hasQueuedThreads());
1275	+	t2.start();
1276	+	waitForQueuedThread(lock, t2);
1277	+	assertTrue(lock.hasQueuedThreads());
1278	+	t1.interrupt();
1279	+	awaitTermination(t1);
1280	+	assertTrue(lock.hasQueuedThreads());
1281	+	lock.writeLock().unlock();
1282	+	awaitTermination(t2);
1283	+	assertFalse(lock.hasQueuedThreads());
1284	+	}
1285	+
1286	+	/**
1287	+	* hasQueuedThread(null) throws NPE
1288	+	*/
1289	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
1290	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1291	+	public void testHasQueuedThreadNPE(boolean fair) {
1292	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1293		try {
1294	<	assertFalse(lock.hasQueuedThreads());
1295	<	lock.writeLock().lock();
1296	<	t1.start();
1297	<	Thread.sleep(SHORT_DELAY_MS);
1298	<	assertTrue(lock.hasQueuedThreads());
1299	<	t2.start();
1300	<	Thread.sleep(SHORT_DELAY_MS);
1301	<	assertTrue(lock.hasQueuedThreads());
1302	<	t1.interrupt();
1303	<	Thread.sleep(SHORT_DELAY_MS);
1304	<	assertTrue(lock.hasQueuedThreads());
1305	<	lock.writeLock().unlock();
1306	<	Thread.sleep(SHORT_DELAY_MS);
1307	<	assertFalse(lock.hasQueuedThreads());
1308	<	t1.join();
1309	<	t2.join();
1310	<	} catch(Exception e){
1311	<	unexpectedException();
1312	<	}
1313	<	}
1294	>	lock.hasQueuedThread(null);
1295	>	shouldThrow();
1296	>	} catch (NullPointerException success) {}
1297	>	}
1298	>
1299	>	/**
1300	>	* hasQueuedThread reports whether a thread is queued
1301	>	*/
1302	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
1303	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1304	>	public void testHasQueuedThread(boolean fair) {
1305	>	final PublicReentrantReadWriteLock lock =
1306	>	new PublicReentrantReadWriteLock(fair);
1307	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1308	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1309	>	assertFalse(lock.hasQueuedThread(t1));
1310	>	assertFalse(lock.hasQueuedThread(t2));
1311	>	lock.writeLock().lock();
1312	>	t1.start();
1313	>	waitForQueuedThread(lock, t1);
1314	>	assertTrue(lock.hasQueuedThread(t1));
1315	>	assertFalse(lock.hasQueuedThread(t2));
1316	>	t2.start();
1317	>	waitForQueuedThread(lock, t2);
1318	>	assertTrue(lock.hasQueuedThread(t1));
1319	>	assertTrue(lock.hasQueuedThread(t2));
1320	>	t1.interrupt();
1321	>	awaitTermination(t1);
1322	>	assertFalse(lock.hasQueuedThread(t1));
1323	>	assertTrue(lock.hasQueuedThread(t2));
1324	>	lock.writeLock().unlock();
1325	>	awaitTermination(t2);
1326	>	assertFalse(lock.hasQueuedThread(t1));
1327	>	assertFalse(lock.hasQueuedThread(t2));
1328	>	}
1329
1330		/**
1331		* getQueueLength reports number of waiting threads
1332		*/
1333	<	public void testGetQueueLength() {
1334	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1333	>	public void testGetQueueLength()      { testGetQueueLength(false); }
1334	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1335	>	public void testGetQueueLength(boolean fair) {
1336	>	final PublicReentrantReadWriteLock lock =
1337	>	new PublicReentrantReadWriteLock(fair);
1338		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1339		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1340	<	try {
1341	<	assertEquals(0, lock.getQueueLength());
1342	<	lock.writeLock().lock();
1343	<	t1.start();
1344	<	Thread.sleep(SHORT_DELAY_MS);
1345	<	assertEquals(1, lock.getQueueLength());
1346	<	t2.start();
1347	<	Thread.sleep(SHORT_DELAY_MS);
1348	<	assertEquals(2, lock.getQueueLength());
1349	<	t1.interrupt();
1350	<	Thread.sleep(SHORT_DELAY_MS);
1351	<	assertEquals(1, lock.getQueueLength());
1352	<	lock.writeLock().unlock();
1353	<	Thread.sleep(SHORT_DELAY_MS);
1354	<	assertEquals(0, lock.getQueueLength());
901	<	t1.join();
902	<	t2.join();
903	<	} catch(Exception e){
904	<	unexpectedException();
905	<	}
906	<	}
1340	>	assertEquals(0, lock.getQueueLength());
1341	>	lock.writeLock().lock();
1342	>	t1.start();
1343	>	waitForQueuedThread(lock, t1);
1344	>	assertEquals(1, lock.getQueueLength());
1345	>	t2.start();
1346	>	waitForQueuedThread(lock, t2);
1347	>	assertEquals(2, lock.getQueueLength());
1348	>	t1.interrupt();
1349	>	awaitTermination(t1);
1350	>	assertEquals(1, lock.getQueueLength());
1351	>	lock.writeLock().unlock();
1352	>	awaitTermination(t2);
1353	>	assertEquals(0, lock.getQueueLength());
1354	>	}
1355
1356		/**
1357		* getQueuedThreads includes waiting threads
1358		*/
1359	<	public void testGetQueuedThreads() {
1360	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1359	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
1360	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1361	>	public void testGetQueuedThreads(boolean fair) {
1362	>	final PublicReentrantReadWriteLock lock =
1363	>	new PublicReentrantReadWriteLock(fair);
1364		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1365		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1366	<	try {
1367	<	assertTrue(lock.getQueuedThreads().isEmpty());
1368	<	lock.writeLock().lock();
1369	<	assertTrue(lock.getQueuedThreads().isEmpty());
1370	<	t1.start();
1371	<	Thread.sleep(SHORT_DELAY_MS);
1372	<	assertTrue(lock.getQueuedThreads().contains(t1));
1373	<	t2.start();
1374	<	Thread.sleep(SHORT_DELAY_MS);
1375	<	assertTrue(lock.getQueuedThreads().contains(t1));
1376	<	assertTrue(lock.getQueuedThreads().contains(t2));
1377	<	t1.interrupt();
1378	<	Thread.sleep(SHORT_DELAY_MS);
1379	<	assertFalse(lock.getQueuedThreads().contains(t1));
1380	<	assertTrue(lock.getQueuedThreads().contains(t2));
1381	<	lock.writeLock().unlock();
1382	<	Thread.sleep(SHORT_DELAY_MS);
1383	<	assertTrue(lock.getQueuedThreads().isEmpty());
1384	<	t1.join();
1385	<	t2.join();
1386	<	} catch(Exception e){
936	<	unexpectedException();
937	<	}
938	<	}
1366	>	assertTrue(lock.getQueuedThreads().isEmpty());
1367	>	lock.writeLock().lock();
1368	>	assertTrue(lock.getQueuedThreads().isEmpty());
1369	>	t1.start();
1370	>	waitForQueuedThread(lock, t1);
1371	>	assertEquals(1, lock.getQueuedThreads().size());
1372	>	assertTrue(lock.getQueuedThreads().contains(t1));
1373	>	t2.start();
1374	>	waitForQueuedThread(lock, t2);
1375	>	assertEquals(2, lock.getQueuedThreads().size());
1376	>	assertTrue(lock.getQueuedThreads().contains(t1));
1377	>	assertTrue(lock.getQueuedThreads().contains(t2));
1378	>	t1.interrupt();
1379	>	awaitTermination(t1);
1380	>	assertFalse(lock.getQueuedThreads().contains(t1));
1381	>	assertTrue(lock.getQueuedThreads().contains(t2));
1382	>	assertEquals(1, lock.getQueuedThreads().size());
1383	>	lock.writeLock().unlock();
1384	>	awaitTermination(t2);
1385	>	assertTrue(lock.getQueuedThreads().isEmpty());
1386	>	}
1387
1388		/**
1389		* hasWaiters throws NPE if null
1390		*/
1391	<	public void testHasWaitersNPE() {
1392	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1391	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
1392	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1393	>	public void testHasWaitersNPE(boolean fair) {
1394	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1395		try {
1396		lock.hasWaiters(null);
1397		shouldThrow();
1398	<	} catch (NullPointerException success) {
949	<	} catch (Exception ex) {
950	<	unexpectedException();
951	<	}
1398	>	} catch (NullPointerException success) {}
1399		}
1400
1401		/**
1402		* getWaitQueueLength throws NPE if null
1403		*/
1404	<	public void testGetWaitQueueLengthNPE() {
1405	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1404	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
1405	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1406	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1407	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1408		try {
1409		lock.getWaitQueueLength(null);
1410		shouldThrow();
1411	<	} catch (NullPointerException success) {
963	<	} catch (Exception ex) {
964	<	unexpectedException();
965	<	}
1411	>	} catch (NullPointerException success) {}
1412		}
1413
968	–
1414		/**
1415		* getWaitingThreads throws NPE if null
1416		*/
1417	<	public void testGetWaitingThreadsNPE() {
1418	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1417	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
1418	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1419	>	public void testGetWaitingThreadsNPE(boolean fair) {
1420	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1421		try {
1422		lock.getWaitingThreads(null);
1423		shouldThrow();
1424	<	} catch (NullPointerException success) {
978	<	} catch (Exception ex) {
979	<	unexpectedException();
980	<	}
1424	>	} catch (NullPointerException success) {}
1425		}
1426
1427		/**
1428	<	* hasWaiters throws IAE if not owned
1428	>	* hasWaiters throws IllegalArgumentException if not owned
1429		*/
1430	<	public void testHasWaitersIAE() {
1431	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1432	<	final Condition c = (lock.writeLock().newCondition());
1433	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1430	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
1431	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1432	>	public void testHasWaitersIAE(boolean fair) {
1433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1434	>	final Condition c = lock.writeLock().newCondition();
1435	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1436		try {
1437		lock2.hasWaiters(c);
1438		shouldThrow();
1439	<	} catch (IllegalArgumentException success) {
994	<	} catch (Exception ex) {
995	<	unexpectedException();
996	<	}
1439	>	} catch (IllegalArgumentException success) {}
1440		}
1441
1442		/**
1443	<	* hasWaiters throws IMSE if not locked
1443	>	* hasWaiters throws IllegalMonitorStateException if not locked
1444		*/
1445	<	public void testHasWaitersIMSE() {
1446	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1447	<	final Condition c = (lock.writeLock().newCondition());
1445	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
1446	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1447	>	public void testHasWaitersIMSE(boolean fair) {
1448	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1449	>	final Condition c = lock.writeLock().newCondition();
1450		try {
1451		lock.hasWaiters(c);
1452		shouldThrow();
1453	<	} catch (IllegalMonitorStateException success) {
1009	<	} catch (Exception ex) {
1010	<	unexpectedException();
1011	<	}
1453	>	} catch (IllegalMonitorStateException success) {}
1454		}
1455
1014	–
1456		/**
1457	<	* getWaitQueueLength throws IAE if not owned
1457	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1458		*/
1459	<	public void testGetWaitQueueLengthIAE() {
1460	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1461	<	final Condition c = (lock.writeLock().newCondition());
1462	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1459	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
1460	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1461	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1462	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1463	>	final Condition c = lock.writeLock().newCondition();
1464	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1465		try {
1466		lock2.getWaitQueueLength(c);
1467		shouldThrow();
1468	<	} catch (IllegalArgumentException success) {
1026	<	} catch (Exception ex) {
1027	<	unexpectedException();
1028	<	}
1468	>	} catch (IllegalArgumentException success) {}
1469		}
1470
1471		/**
1472	<	* getWaitQueueLength throws IMSE if not locked
1472	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1473		*/
1474	<	public void testGetWaitQueueLengthIMSE() {
1475	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1476	<	final Condition c = (lock.writeLock().newCondition());
1474	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
1475	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1476	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1477	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1478	>	final Condition c = lock.writeLock().newCondition();
1479		try {
1480		lock.getWaitQueueLength(c);
1481		shouldThrow();
1482	<	} catch (IllegalMonitorStateException success) {
1041	<	} catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1482	>	} catch (IllegalMonitorStateException success) {}
1483		}
1484
1046	–
1485		/**
1486	<	* getWaitingThreads throws IAE if not owned
1486	>	* getWaitingThreads throws IllegalArgumentException if not owned
1487		*/
1488	<	public void testGetWaitingThreadsIAE() {
1489	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1490	<	final Condition c = (lock.writeLock().newCondition());
1491	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1488	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
1489	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1490	>	public void testGetWaitingThreadsIAE(boolean fair) {
1491	>	final PublicReentrantReadWriteLock lock =
1492	>	new PublicReentrantReadWriteLock(fair);
1493	>	final Condition c = lock.writeLock().newCondition();
1494	>	final PublicReentrantReadWriteLock lock2 =
1495	>	new PublicReentrantReadWriteLock(fair);
1496		try {
1497		lock2.getWaitingThreads(c);
1498		shouldThrow();
1499	<	} catch (IllegalArgumentException success) {
1058	<	} catch (Exception ex) {
1059	<	unexpectedException();
1060	<	}
1499	>	} catch (IllegalArgumentException success) {}
1500		}
1501
1502		/**
1503	<	* getWaitingThreads throws IMSE if not locked
1503	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1504		*/
1505	<	public void testGetWaitingThreadsIMSE() {
1506	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1507	<	final Condition c = (lock.writeLock().newCondition());
1505	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
1506	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1507	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1508	>	final PublicReentrantReadWriteLock lock =
1509	>	new PublicReentrantReadWriteLock(fair);
1510	>	final Condition c = lock.writeLock().newCondition();
1511		try {
1512		lock.getWaitingThreads(c);
1513		shouldThrow();
1514	<	} catch (IllegalMonitorStateException success) {
1073	<	} catch (Exception ex) {
1074	<	unexpectedException();
1075	<	}
1514	>	} catch (IllegalMonitorStateException success) {}
1515		}
1516
1078	–
1517		/**
1518		* hasWaiters returns true when a thread is waiting, else false
1519		*/
1520	<	public void testHasWaiters() {
1521	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1522	<	final Condition c = (lock.writeLock().newCondition());
1523	<	Thread t = new Thread(new Runnable() {
1524	<	public void run() {
1525	<	try {
1526	<	lock.writeLock().lock();
1527	<	threadAssertFalse(lock.hasWaiters(c));
1528	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1529	<	c.await();
1530	<	lock.writeLock().unlock();
1531	<	}
1532	<	catch(InterruptedException e) {
1533	<	threadUnexpectedException();
1534	<	}
1535	<	}
1536	<	});
1537	<
1538	<	try {
1539	<	t.start();
1540	<	Thread.sleep(SHORT_DELAY_MS);
1541	<	lock.writeLock().lock();
1542	<	assertTrue(lock.hasWaiters(c));
1543	<	assertEquals(1, lock.getWaitQueueLength(c));
1544	<	c.signal();
1545	<	lock.writeLock().unlock();
1546	<	Thread.sleep(SHORT_DELAY_MS);
1547	<	lock.writeLock().lock();
1548	<	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	<	}
1520	>	public void testHasWaiters()      { testHasWaiters(false); }
1521	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1522	>	public void testHasWaiters(boolean fair) {
1523	>	final PublicReentrantReadWriteLock lock =
1524	>	new PublicReentrantReadWriteLock(fair);
1525	>	final Condition c = lock.writeLock().newCondition();
1526	>	final CountDownLatch locked = new CountDownLatch(1);
1527	>	Thread t = newStartedThread(new CheckedRunnable() {
1528	>	public void realRun() throws InterruptedException {
1529	>	lock.writeLock().lock();
1530	>	assertHasNoWaiters(lock, c);
1531	>	assertFalse(lock.hasWaiters(c));
1532	>	locked.countDown();
1533	>	c.await();
1534	>	assertHasNoWaiters(lock, c);
1535	>	assertFalse(lock.hasWaiters(c));
1536	>	lock.writeLock().unlock();
1537	>	}});
1538	>
1539	>	await(locked);
1540	>	lock.writeLock().lock();
1541	>	assertHasWaiters(lock, c, t);
1542	>	assertTrue(lock.hasWaiters(c));
1543	>	c.signal();
1544	>	assertHasNoWaiters(lock, c);
1545	>	assertFalse(lock.hasWaiters(c));
1546	>	lock.writeLock().unlock();
1547	>	awaitTermination(t);
1548	>	assertHasNoWaiters(lock, c);
1549		}
1550
1551		/**
1552		* getWaitQueueLength returns number of waiting threads
1553		*/
1554	<	public void testGetWaitQueueLength() {
1555	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1556	<	final Condition c = (lock.writeLock().newCondition());
1557	<	Thread t = new Thread(new Runnable() {
1558	<	public void run() {
1559	<	try {
1560	<	lock.writeLock().lock();
1561	<	threadAssertFalse(lock.hasWaiters(c));
1562	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
1563	<	c.await();
1564	<	lock.writeLock().unlock();
1565	<	}
1566	<	catch(InterruptedException e) {
1567	<	threadUnexpectedException();
1568	<	}
1569	<	}
1570	<	});
1571	<
1572	<	try {
1573	<	t.start();
1574	<	Thread.sleep(SHORT_DELAY_MS);
1575	<	lock.writeLock().lock();
1576	<	assertTrue(lock.hasWaiters(c));
1577	<	assertEquals(1, lock.getWaitQueueLength(c));
1578	<	c.signal();
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	<	}
1554	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
1555	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1556	>	public void testGetWaitQueueLength(boolean fair) {
1557	>	final PublicReentrantReadWriteLock lock =
1558	>	new PublicReentrantReadWriteLock(fair);
1559	>	final Condition c = lock.writeLock().newCondition();
1560	>	final CountDownLatch locked = new CountDownLatch(1);
1561	>	Thread t = newStartedThread(new CheckedRunnable() {
1562	>	public void realRun() throws InterruptedException {
1563	>	lock.writeLock().lock();
1564	>	assertEquals(0, lock.getWaitQueueLength(c));
1565	>	locked.countDown();
1566	>	c.await();
1567	>	lock.writeLock().unlock();
1568	>	}});
1569	>
1570	>	await(locked);
1571	>	lock.writeLock().lock();
1572	>	assertHasWaiters(lock, c, t);
1573	>	assertEquals(1, lock.getWaitQueueLength(c));
1574	>	c.signal();
1575	>	assertHasNoWaiters(lock, c);
1576	>	assertEquals(0, lock.getWaitQueueLength(c));
1577	>	lock.writeLock().unlock();
1578	>	awaitTermination(t);
1579		}
1580
1163	–
1581		/**
1582		* getWaitingThreads returns only and all waiting threads
1583		*/
1584	<	public void testGetWaitingThreads() {
1585	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1584	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
1585	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1586	>	public void testGetWaitingThreads(boolean fair) {
1587	>	final PublicReentrantReadWriteLock lock =
1588	>	new PublicReentrantReadWriteLock(fair);
1589		final Condition c = lock.writeLock().newCondition();
1590	<	Thread t1 = new Thread(new Runnable() {
1591	<	public void run() {
1592	<	try {
1593	<	lock.writeLock().lock();
1594	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1595	<	c.await();
1596	<	lock.writeLock().unlock();
1597	<	}
1598	<	catch(InterruptedException e) {
1599	<	threadUnexpectedException();
1600	<	}
1601	<	}
1602	<	});
1603	<
1604	<	Thread t2 = new Thread(new Runnable() {
1605	<	public void run() {
1606	<	try {
1607	<	lock.writeLock().lock();
1608	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1609	<	c.await();
1610	<	lock.writeLock().unlock();
1611	<	}
1612	<	catch(InterruptedException e) {
1613	<	threadUnexpectedException();
1614	<	}
1615	<	}
1616	<	});
1617	<
1618	<	try {
1619	<	lock.writeLock().lock();
1620	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1621	<	lock.writeLock().unlock();
1622	<	t1.start();
1623	<	Thread.sleep(SHORT_DELAY_MS);
1624	<	t2.start();
1625	<	Thread.sleep(SHORT_DELAY_MS);
1626	<	lock.writeLock().lock();
1627	<	assertTrue(lock.hasWaiters(c));
1628	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
1629	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
1630	<	c.signalAll();
1631	<	lock.writeLock().unlock();
1632	<	Thread.sleep(SHORT_DELAY_MS);
1633	<	lock.writeLock().lock();
1634	<	assertFalse(lock.hasWaiters(c));
1635	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1636	<	lock.writeLock().unlock();
1637	<	t1.join(SHORT_DELAY_MS);
1638	<	t2.join(SHORT_DELAY_MS);
1639	<	assertFalse(t1.isAlive());
1640	<	assertFalse(t2.isAlive());
1641	<	}
1642	<	catch (Exception ex) {
1643	<	unexpectedException();
1644	<	}
1590	>	final CountDownLatch locked1 = new CountDownLatch(1);
1591	>	final CountDownLatch locked2 = new CountDownLatch(1);
1592	>	Thread t1 = new Thread(new CheckedRunnable() {
1593	>	public void realRun() throws InterruptedException {
1594	>	lock.writeLock().lock();
1595	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1596	>	locked1.countDown();
1597	>	c.await();
1598	>	lock.writeLock().unlock();
1599	>	}});
1600	>
1601	>	Thread t2 = new Thread(new CheckedRunnable() {
1602	>	public void realRun() throws InterruptedException {
1603	>	lock.writeLock().lock();
1604	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
1605	>	locked2.countDown();
1606	>	c.await();
1607	>	lock.writeLock().unlock();
1608	>	}});
1609	>
1610	>	lock.writeLock().lock();
1611	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
1612	>	lock.writeLock().unlock();
1613	>
1614	>	t1.start();
1615	>	await(locked1);
1616	>	t2.start();
1617	>	await(locked2);
1618	>
1619	>	lock.writeLock().lock();
1620	>	assertTrue(lock.hasWaiters(c));
1621	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
1622	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
1623	>	assertEquals(2, lock.getWaitingThreads(c).size());
1624	>	c.signalAll();
1625	>	assertHasNoWaiters(lock, c);
1626	>	lock.writeLock().unlock();
1627	>
1628	>	awaitTermination(t1);
1629	>	awaitTermination(t2);
1630	>
1631	>	assertHasNoWaiters(lock, c);
1632	>	}
1633	>
1634	>	/**
1635	>	* toString indicates current lock state
1636	>	*/
1637	>	public void testToString()      { testToString(false); }
1638	>	public void testToString_fair() { testToString(true); }
1639	>	public void testToString(boolean fair) {
1640	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1641	>	assertTrue(lock.toString().contains("Write locks = 0"));
1642	>	assertTrue(lock.toString().contains("Read locks = 0"));
1643	>	lock.writeLock().lock();
1644	>	assertTrue(lock.toString().contains("Write locks = 1"));
1645	>	assertTrue(lock.toString().contains("Read locks = 0"));
1646	>	lock.writeLock().unlock();
1647	>	lock.readLock().lock();
1648	>	lock.readLock().lock();
1649	>	assertTrue(lock.toString().contains("Write locks = 0"));
1650	>	assertTrue(lock.toString().contains("Read locks = 2"));
1651	>	}
1652	>
1653	>	/**
1654	>	* readLock.toString indicates current lock state
1655	>	*/
1656	>	public void testReadLockToString()      { testReadLockToString(false); }
1657	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1658	>	public void testReadLockToString(boolean fair) {
1659	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1660	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1661	>	lock.readLock().lock();
1662	>	lock.readLock().lock();
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664	>	}
1665	>
1666	>	/**
1667	>	* writeLock.toString indicates current lock state
1668	>	*/
1669	>	public void testWriteLockToString()      { testWriteLockToString(false); }
1670	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1671	>	public void testWriteLockToString(boolean fair) {
1672	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1673	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1674	>	lock.writeLock().lock();
1675	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1676	>	lock.writeLock().unlock();
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678		}
1679
1680		}

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