[ViewVC] Diff of: jsr166/jsr166/src/test/tck/ReentrantReadWriteLockTest.java

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.53 by jsr166, Mon May 2 00:49:26 2011 UTC vs.
Revision 1.84 by jsr166, Thu Sep 26 20:48:53 2019 UTC

#	Line 6 \| Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.concurrent.locks.*;
11	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	–	import java.io.*;
14	–	import java.util.*;
10
11	+	import java.util.Arrays;
12	+	import java.util.Collection;
13	+	import java.util.HashSet;
14	+	import java.util.concurrent.Callable;
15	+	import java.util.concurrent.CountDownLatch;
16	+	import java.util.concurrent.atomic.AtomicBoolean;
17	+	import java.util.concurrent.locks.Condition;
18	+	import java.util.concurrent.locks.Lock;
19	+	import java.util.concurrent.locks.ReentrantReadWriteLock;
20	+
21	+	import junit.framework.Test;
22	+	import junit.framework.TestSuite;
23	+
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class ReentrantReadWriteLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run(suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30		return new TestSuite(ReentrantReadWriteLockTest.class);
#	Line 32 \| Line 41 \| public class ReentrantReadWriteLockTest
41		}
42		}
43
35	–
44		/**
45		* A runnable calling lockInterruptibly that expects to be
46		* interrupted
#	Line 50 \| Line 58 \| public class ReentrantReadWriteLockTest
58		*/
59		static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
60		PublicReentrantReadWriteLock() { super(); }
61	+	PublicReentrantReadWriteLock(boolean fair) { super(fair); }
62	+	public Thread getOwner() {
63	+	return super.getOwner();
64	+	}
65		public Collection<Thread> getQueuedThreads() {
66		return super.getQueuedThreads();
67		}
#	Line 59 \| Line 71 \| public class ReentrantReadWriteLockTest
71		}
72
73		/**
74	<	* Releases lock, checking that it had a hold count of 1.
74	>	* Releases write lock, checking that it had a hold count of 1.
75		*/
76	<	void releaseLock(ReentrantReadWriteLock.WriteLock lock) {
77	<	assertTrue(lock.isHeldByCurrentThread());
78	<	lock.unlock();
79	<	assertFalse(lock.isHeldByCurrentThread());
76	>	void releaseWriteLock(PublicReentrantReadWriteLock lock) {
77	>	ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
78	>	assertWriteLockedByMoi(lock);
79	>	assertEquals(1, lock.getWriteHoldCount());
80	>	writeLock.unlock();
81	>	assertNotWriteLocked(lock);
82		}
83
84		/**
85	<	* Constructor sets given fairness, and is in unlocked state
85	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
86		*/
87	<	public void testConstructor() {
88	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
89	<	assertFalse(rl.isFair());
90	<	assertFalse(rl.isWriteLocked());
91	<	assertEquals(0, rl.getReadLockCount());
92	<	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
93	<	assertTrue(r2.isFair());
94	<	assertFalse(r2.isWriteLocked());
95	<	assertEquals(0, r2.getReadLockCount());
82	<	ReentrantReadWriteLock r3 = new ReentrantReadWriteLock(false);
83	<	assertFalse(r3.isFair());
84	<	assertFalse(r3.isWriteLocked());
85	<	assertEquals(0, r3.getReadLockCount());
87	>	void waitForQueuedThread(PublicReentrantReadWriteLock lock, Thread t) {
88	>	long startTime = System.nanoTime();
89	>	while (!lock.hasQueuedThread(t)) {
90	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
91	>	throw new AssertionError("timed out");
92	>	Thread.yield();
93	>	}
94	>	assertTrue(t.isAlive());
95	>	assertNotSame(t, lock.getOwner());
96		}
97
98		/**
99	<	* write-locking and read-locking an unlocked lock succeed
99	>	* Checks that lock is not write-locked.
100	>	*/
101	>	void assertNotWriteLocked(PublicReentrantReadWriteLock lock) {
102	>	assertFalse(lock.isWriteLocked());
103	>	assertFalse(lock.isWriteLockedByCurrentThread());
104	>	assertFalse(lock.writeLock().isHeldByCurrentThread());
105	>	assertEquals(0, lock.getWriteHoldCount());
106	>	assertEquals(0, lock.writeLock().getHoldCount());
107	>	assertNull(lock.getOwner());
108	>	}
109	>
110	>	/**
111	>	* Checks that lock is write-locked by the given thread.
112	>	*/
113	>	void assertWriteLockedBy(PublicReentrantReadWriteLock lock, Thread t) {
114	>	assertTrue(lock.isWriteLocked());
115	>	assertSame(t, lock.getOwner());
116	>	assertEquals(t == Thread.currentThread(),
117	>	lock.isWriteLockedByCurrentThread());
118	>	assertEquals(t == Thread.currentThread(),
119	>	lock.writeLock().isHeldByCurrentThread());
120	>	assertEquals(t == Thread.currentThread(),
121	>	lock.getWriteHoldCount() > 0);
122	>	assertEquals(t == Thread.currentThread(),
123	>	lock.writeLock().getHoldCount() > 0);
124	>	assertEquals(0, lock.getReadLockCount());
125	>	}
126	>
127	>	/**
128	>	* Checks that lock is write-locked by the current thread.
129	>	*/
130	>	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
131	>	assertWriteLockedBy(lock, Thread.currentThread());
132	>	}
133	>
134	>	/**
135	>	* Checks that condition c has no waiters.
136		*/
137	<	public void testLock() {
138	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
93	<	rl.writeLock().lock();
94	<	assertTrue(rl.isWriteLocked());
95	<	assertTrue(rl.isWriteLockedByCurrentThread());
96	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
97	<	assertEquals(0, rl.getReadLockCount());
98	<	rl.writeLock().unlock();
99	<	assertFalse(rl.isWriteLocked());
100	<	assertFalse(rl.isWriteLockedByCurrentThread());
101	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
102	<	assertEquals(0, rl.getReadLockCount());
103	<	rl.readLock().lock();
104	<	assertFalse(rl.isWriteLocked());
105	<	assertFalse(rl.isWriteLockedByCurrentThread());
106	<	assertEquals(1, rl.getReadLockCount());
107	<	rl.readLock().unlock();
108	<	assertFalse(rl.isWriteLocked());
109	<	assertFalse(rl.isWriteLockedByCurrentThread());
110	<	assertEquals(0, rl.getReadLockCount());
137	>	void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
138	>	assertHasWaiters(lock, c, new Thread[] {});
139		}
140
141	+	/**
142	+	* Checks that condition c has exactly the given waiter threads.
143	+	*/
144	+	void assertHasWaiters(PublicReentrantReadWriteLock lock, Condition c,
145	+	Thread... threads) {
146	+	lock.writeLock().lock();
147	+	assertEquals(threads.length > 0, lock.hasWaiters(c));
148	+	assertEquals(threads.length, lock.getWaitQueueLength(c));
149	+	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
150	+	assertEquals(threads.length, lock.getWaitingThreads(c).size());
151	+	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
152	+	new HashSet<Thread>(Arrays.asList(threads)));
153	+	lock.writeLock().unlock();
154	+	}
155	+
156	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
157	+
158	+	/**
159	+	* Awaits condition "indefinitely" using the specified AwaitMethod.
160	+	*/
161	+	void await(Condition c, AwaitMethod awaitMethod)
162	+	throws InterruptedException {
163	+	long timeoutMillis = 2 * LONG_DELAY_MS;
164	+	switch (awaitMethod) {
165	+	case await:
166	+	c.await();
167	+	break;
168	+	case awaitTimed:
169	+	assertTrue(c.await(timeoutMillis, MILLISECONDS));
170	+	break;
171	+	case awaitNanos:
172	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
173	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
174	+	assertTrue(nanosRemaining > timeoutNanos / 2);
175	+	assertTrue(nanosRemaining <= timeoutNanos);
176	+	break;
177	+	case awaitUntil:
178	+	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
179	+	break;
180	+	default:
181	+	throw new AssertionError();
182	+	}
183	+	}
184
185		/**
186	<	* locking an unlocked fair lock succeeds
187	<	*/
188	<	public void testFairLock() {
189	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
190	<	rl.writeLock().lock();
191	<	assertTrue(rl.isWriteLocked());
192	<	assertTrue(rl.isWriteLockedByCurrentThread());
193	<	assertTrue(rl.writeLock().isHeldByCurrentThread());
194	<	assertEquals(0, rl.getReadLockCount());
195	<	rl.writeLock().unlock();
196	<	assertFalse(rl.isWriteLocked());
197	<	assertFalse(rl.isWriteLockedByCurrentThread());
198	<	assertFalse(rl.writeLock().isHeldByCurrentThread());
199	<	assertEquals(0, rl.getReadLockCount());
200	<	rl.readLock().lock();
201	<	assertFalse(rl.isWriteLocked());
202	<	assertFalse(rl.isWriteLockedByCurrentThread());
203	<	assertEquals(1, rl.getReadLockCount());
204	<	rl.readLock().unlock();
205	<	assertFalse(rl.isWriteLocked());
206	<	assertFalse(rl.isWriteLockedByCurrentThread());
207	<	assertEquals(0, rl.getReadLockCount());
186	>	* Constructor sets given fairness, and is in unlocked state
187	>	*/
188	>	public void testConstructor() {
189	>	PublicReentrantReadWriteLock lock;
190	>
191	>	lock = new PublicReentrantReadWriteLock();
192	>	assertFalse(lock.isFair());
193	>	assertNotWriteLocked(lock);
194	>	assertEquals(0, lock.getReadLockCount());
195	>
196	>	lock = new PublicReentrantReadWriteLock(true);
197	>	assertTrue(lock.isFair());
198	>	assertNotWriteLocked(lock);
199	>	assertEquals(0, lock.getReadLockCount());
200	>
201	>	lock = new PublicReentrantReadWriteLock(false);
202	>	assertFalse(lock.isFair());
203	>	assertNotWriteLocked(lock);
204	>	assertEquals(0, lock.getReadLockCount());
205	>	}
206	>
207	>	/**
208	>	* write-locking and read-locking an unlocked lock succeed
209	>	*/
210	>	public void testLock() { testLock(false); }
211	>	public void testLock_fair() { testLock(true); }
212	>	public void testLock(boolean fair) {
213	>	PublicReentrantReadWriteLock lock =
214	>	new PublicReentrantReadWriteLock(fair);
215	>	assertNotWriteLocked(lock);
216	>	lock.writeLock().lock();
217	>	assertWriteLockedByMoi(lock);
218	>	lock.writeLock().unlock();
219	>	assertNotWriteLocked(lock);
220	>	assertEquals(0, lock.getReadLockCount());
221	>	lock.readLock().lock();
222	>	assertNotWriteLocked(lock);
223	>	assertEquals(1, lock.getReadLockCount());
224	>	lock.readLock().unlock();
225	>	assertNotWriteLocked(lock);
226	>	assertEquals(0, lock.getReadLockCount());
227		}
228
229		/**
230		* getWriteHoldCount returns number of recursive holds
231		*/
232	<	public void testGetWriteHoldCount() {
233	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
232	>	public void testGetWriteHoldCount() { testGetWriteHoldCount(false); }
233	>	public void testGetWriteHoldCount_fair() { testGetWriteHoldCount(true); }
234	>	public void testGetWriteHoldCount(boolean fair) {
235	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
236		for (int i = 1; i <= SIZE; i++) {
237		lock.writeLock().lock();
238		assertEquals(i,lock.getWriteHoldCount());
239		}
240		for (int i = SIZE; i > 0; i--) {
241		lock.writeLock().unlock();
242	<	assertEquals(i-1,lock.getWriteHoldCount());
242	>	assertEquals(i - 1,lock.getWriteHoldCount());
243		}
244		}
245
246		/**
247	<	* WriteLock.getHoldCount returns number of recursive holds
247	>	* writelock.getHoldCount returns number of recursive holds
248		*/
249	<	public void testGetHoldCount() {
250	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
249	>	public void testGetHoldCount() { testGetHoldCount(false); }
250	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
251	>	public void testGetHoldCount(boolean fair) {
252	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
253		for (int i = 1; i <= SIZE; i++) {
254		lock.writeLock().lock();
255		assertEquals(i,lock.writeLock().getHoldCount());
256		}
257		for (int i = SIZE; i > 0; i--) {
258		lock.writeLock().unlock();
259	<	assertEquals(i-1,lock.writeLock().getHoldCount());
259	>	assertEquals(i - 1,lock.writeLock().getHoldCount());
260		}
261		}
262
263		/**
264		* getReadHoldCount returns number of recursive holds
265		*/
266	<	public void testGetReadHoldCount() {
267	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
266	>	public void testGetReadHoldCount() { testGetReadHoldCount(false); }
267	>	public void testGetReadHoldCount_fair() { testGetReadHoldCount(true); }
268	>	public void testGetReadHoldCount(boolean fair) {
269	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
270		for (int i = 1; i <= SIZE; i++) {
271		lock.readLock().lock();
272		assertEquals(i,lock.getReadHoldCount());
273		}
274		for (int i = SIZE; i > 0; i--) {
275		lock.readLock().unlock();
276	<	assertEquals(i-1,lock.getReadHoldCount());
276	>	assertEquals(i - 1,lock.getReadHoldCount());
277		}
278		}
279
184	–
280		/**
281		* write-unlocking an unlocked lock throws IllegalMonitorStateException
282		*/
283	<	public void testUnlock_IllegalMonitorStateException() {
284	<	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
283	>	public void testWriteUnlock_IMSE() { testWriteUnlock_IMSE(false); }
284	>	public void testWriteUnlock_IMSE_fair() { testWriteUnlock_IMSE(true); }
285	>	public void testWriteUnlock_IMSE(boolean fair) {
286	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
287		try {
288	<	rl.writeLock().unlock();
288	>	lock.writeLock().unlock();
289		shouldThrow();
290		} catch (IllegalMonitorStateException success) {}
291		}
292
293	+	/**
294	+	* read-unlocking an unlocked lock throws IllegalMonitorStateException
295	+	*/
296	+	public void testReadUnlock_IMSE() { testReadUnlock_IMSE(false); }
297	+	public void testReadUnlock_IMSE_fair() { testReadUnlock_IMSE(true); }
298	+	public void testReadUnlock_IMSE(boolean fair) {
299	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
300	+	try {
301	+	lock.readLock().unlock();
302	+	shouldThrow();
303	+	} catch (IllegalMonitorStateException success) {}
304	+	}
305
306		/**
307		* write-lockInterruptibly is interruptible
308		*/
309	<	public void testWriteLockInterruptibly_Interrupted() throws Exception {
310	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
309	>	public void testWriteLockInterruptibly_Interruptible() { testWriteLockInterruptibly_Interruptible(false); }
310	>	public void testWriteLockInterruptibly_Interruptible_fair() { testWriteLockInterruptibly_Interruptible(true); }
311	>	public void testWriteLockInterruptibly_Interruptible(boolean fair) {
312	>	final PublicReentrantReadWriteLock lock =
313	>	new PublicReentrantReadWriteLock(fair);
314		lock.writeLock().lock();
315		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
316		public void realRun() throws InterruptedException {
317		lock.writeLock().lockInterruptibly();
318		}});
319
320	<	Thread.sleep(SHORT_DELAY_MS);
320	>	waitForQueuedThread(lock, t);
321		t.interrupt();
322	<	awaitTermination(t, LONG_DELAY_MS);
323	<	releaseLock(lock.writeLock());
322	>	awaitTermination(t);
323	>	releaseWriteLock(lock);
324		}
325
326		/**
327		* timed write-tryLock is interruptible
328		*/
329	<	public void testWriteTryLock_Interrupted() throws InterruptedException {
330	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
329	>	public void testWriteTryLock_Interruptible() { testWriteTryLock_Interruptible(false); }
330	>	public void testWriteTryLock_Interruptible_fair() { testWriteTryLock_Interruptible(true); }
331	>	public void testWriteTryLock_Interruptible(boolean fair) {
332	>	final PublicReentrantReadWriteLock lock =
333	>	new PublicReentrantReadWriteLock(fair);
334		lock.writeLock().lock();
335		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
336		public void realRun() throws InterruptedException {
337	<	lock.writeLock().tryLock(SMALL_DELAY_MS, MILLISECONDS);
337	>	lock.writeLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
338		}});
339
340	<	Thread.sleep(SHORT_DELAY_MS);
340	>	waitForQueuedThread(lock, t);
341		t.interrupt();
342	<	awaitTermination(t, LONG_DELAY_MS);
343	<	releaseLock(lock.writeLock());
342	>	awaitTermination(t);
343	>	releaseWriteLock(lock);
344		}
345
346		/**
347		* read-lockInterruptibly is interruptible
348		*/
349	<	public void testReadLockInterruptibly_Interrupted() throws InterruptedException {
350	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
349	>	public void testReadLockInterruptibly_Interruptible() { testReadLockInterruptibly_Interruptible(false); }
350	>	public void testReadLockInterruptibly_Interruptible_fair() { testReadLockInterruptibly_Interruptible(true); }
351	>	public void testReadLockInterruptibly_Interruptible(boolean fair) {
352	>	final PublicReentrantReadWriteLock lock =
353	>	new PublicReentrantReadWriteLock(fair);
354		lock.writeLock().lock();
355		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
356		public void realRun() throws InterruptedException {
357		lock.readLock().lockInterruptibly();
358		}});
359
360	<	Thread.sleep(SHORT_DELAY_MS);
360	>	waitForQueuedThread(lock, t);
361		t.interrupt();
362	<	awaitTermination(t, LONG_DELAY_MS);
363	<	releaseLock(lock.writeLock());
362	>	awaitTermination(t);
363	>	releaseWriteLock(lock);
364		}
365
366		/**
367		* timed read-tryLock is interruptible
368		*/
369	<	public void testReadTryLock_Interrupted() throws InterruptedException {
370	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
369	>	public void testReadTryLock_Interruptible() { testReadTryLock_Interruptible(false); }
370	>	public void testReadTryLock_Interruptible_fair() { testReadTryLock_Interruptible(true); }
371	>	public void testReadTryLock_Interruptible(boolean fair) {
372	>	final PublicReentrantReadWriteLock lock =
373	>	new PublicReentrantReadWriteLock(fair);
374		lock.writeLock().lock();
375		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
376		public void realRun() throws InterruptedException {
377	<	lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS);
377	>	lock.readLock().tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
378		}});
379
380	<	Thread.sleep(SHORT_DELAY_MS);
380	>	waitForQueuedThread(lock, t);
381		t.interrupt();
382	<	awaitTermination(t, LONG_DELAY_MS);
383	<	releaseLock(lock.writeLock());
382	>	awaitTermination(t);
383	>	releaseWriteLock(lock);
384		}
385
386	+	/**
387	+	* write-tryLock on an unlocked lock succeeds
388	+	*/
389	+	public void testWriteTryLock() { testWriteTryLock(false); }
390	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
391	+	public void testWriteTryLock(boolean fair) {
392	+	final PublicReentrantReadWriteLock lock =
393	+	new PublicReentrantReadWriteLock(fair);
394	+	assertTrue(lock.writeLock().tryLock());
395	+	assertWriteLockedByMoi(lock);
396	+	assertTrue(lock.writeLock().tryLock());
397	+	assertWriteLockedByMoi(lock);
398	+	lock.writeLock().unlock();
399	+	releaseWriteLock(lock);
400	+	}
401
402		/**
403		* write-tryLock fails if locked
404		*/
405	<	public void testWriteTryLockWhenLocked() throws InterruptedException {
406	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
405	>	public void testWriteTryLockWhenLocked() { testWriteTryLockWhenLocked(false); }
406	>	public void testWriteTryLockWhenLocked_fair() { testWriteTryLockWhenLocked(true); }
407	>	public void testWriteTryLockWhenLocked(boolean fair) {
408	>	final PublicReentrantReadWriteLock lock =
409	>	new PublicReentrantReadWriteLock(fair);
410		lock.writeLock().lock();
411		Thread t = newStartedThread(new CheckedRunnable() {
412		public void realRun() {
413		assertFalse(lock.writeLock().tryLock());
414		}});
415
416	<	awaitTermination(t, LONG_DELAY_MS);
417	<	lock.writeLock().unlock();
416	>	awaitTermination(t);
417	>	releaseWriteLock(lock);
418		}
419
420		/**
421		* read-tryLock fails if locked
422		*/
423	<	public void testReadTryLockWhenLocked() throws InterruptedException {
424	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
423	>	public void testReadTryLockWhenLocked() { testReadTryLockWhenLocked(false); }
424	>	public void testReadTryLockWhenLocked_fair() { testReadTryLockWhenLocked(true); }
425	>	public void testReadTryLockWhenLocked(boolean fair) {
426	>	final PublicReentrantReadWriteLock lock =
427	>	new PublicReentrantReadWriteLock(fair);
428		lock.writeLock().lock();
429		Thread t = newStartedThread(new CheckedRunnable() {
430		public void realRun() {
431		assertFalse(lock.readLock().tryLock());
432		}});
433
434	<	awaitTermination(t, LONG_DELAY_MS);
435	<	lock.writeLock().unlock();
434	>	awaitTermination(t);
435	>	releaseWriteLock(lock);
436		}
437
438		/**
439		* Multiple threads can hold a read lock when not write-locked
440		*/
441	<	public void testMultipleReadLocks() throws InterruptedException {
442	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
441	>	public void testMultipleReadLocks() { testMultipleReadLocks(false); }
442	>	public void testMultipleReadLocks_fair() { testMultipleReadLocks(true); }
443	>	public void testMultipleReadLocks(boolean fair) {
444	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
445		lock.readLock().lock();
446		Thread t = newStartedThread(new CheckedRunnable() {
447	<	public void realRun() {
447	>	public void realRun() throws InterruptedException {
448		assertTrue(lock.readLock().tryLock());
449		lock.readLock().unlock();
450	+	assertTrue(lock.readLock().tryLock(LONG_DELAY_MS, MILLISECONDS));
451	+	lock.readLock().unlock();
452	+	lock.readLock().lock();
453	+	lock.readLock().unlock();
454		}});
455
456	<	awaitTermination(t, LONG_DELAY_MS);
456	>	awaitTermination(t);
457		lock.readLock().unlock();
458		}
459
460		/**
461	<	* A writelock succeeds after reading threads unlock
461	>	* A writelock succeeds only after a reading thread unlocks
462		*/
463	<	public void testWriteAfterMultipleReadLocks() throws InterruptedException {
464	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
463	>	public void testWriteAfterReadLock() { testWriteAfterReadLock(false); }
464	>	public void testWriteAfterReadLock_fair() { testWriteAfterReadLock(true); }
465	>	public void testWriteAfterReadLock(boolean fair) {
466	>	final PublicReentrantReadWriteLock lock =
467	>	new PublicReentrantReadWriteLock(fair);
468	>	lock.readLock().lock();
469	>	Thread t = newStartedThread(new CheckedRunnable() {
470	>	public void realRun() {
471	>	assertEquals(1, lock.getReadLockCount());
472	>	lock.writeLock().lock();
473	>	assertEquals(0, lock.getReadLockCount());
474	>	lock.writeLock().unlock();
475	>	}});
476	>	waitForQueuedThread(lock, t);
477	>	assertNotWriteLocked(lock);
478	>	assertEquals(1, lock.getReadLockCount());
479	>	lock.readLock().unlock();
480	>	assertEquals(0, lock.getReadLockCount());
481	>	awaitTermination(t);
482	>	assertNotWriteLocked(lock);
483	>	}
484	>
485	>	/**
486	>	* A writelock succeeds only after reading threads unlock
487	>	*/
488	>	public void testWriteAfterMultipleReadLocks() { testWriteAfterMultipleReadLocks(false); }
489	>	public void testWriteAfterMultipleReadLocks_fair() { testWriteAfterMultipleReadLocks(true); }
490	>	public void testWriteAfterMultipleReadLocks(boolean fair) {
491	>	final PublicReentrantReadWriteLock lock =
492	>	new PublicReentrantReadWriteLock(fair);
493	>	lock.readLock().lock();
494		lock.readLock().lock();
495		Thread t1 = newStartedThread(new CheckedRunnable() {
496		public void realRun() {
497		lock.readLock().lock();
498	+	assertEquals(3, lock.getReadLockCount());
499		lock.readLock().unlock();
500		}});
501	+	awaitTermination(t1);
502	+
503		Thread t2 = newStartedThread(new CheckedRunnable() {
504		public void realRun() {
505	+	assertEquals(2, lock.getReadLockCount());
506		lock.writeLock().lock();
507	+	assertEquals(0, lock.getReadLockCount());
508		lock.writeLock().unlock();
509		}});
510	<
511	<	Thread.sleep(SHORT_DELAY_MS);
510	>	waitForQueuedThread(lock, t2);
511	>	assertNotWriteLocked(lock);
512	>	assertEquals(2, lock.getReadLockCount());
513	>	lock.readLock().unlock();
514		lock.readLock().unlock();
515	<	awaitTermination(t1, LONG_DELAY_MS);
516	<	awaitTermination(t2, LONG_DELAY_MS);
515	>	assertEquals(0, lock.getReadLockCount());
516	>	awaitTermination(t2);
517	>	assertNotWriteLocked(lock);
518		}
519
520		/**
521	<	* Readlocks succeed after a writing thread unlocks
521	>	* A thread that tries to acquire a fair read lock (non-reentrantly)
522	>	* will block if there is a waiting writer thread
523		*/
524	<	public void testReadAfterWriteLock() throws InterruptedException {
525	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
526	<	lock.writeLock().lock();
524	>	public void testReaderWriterReaderFairFifo() {
525	>	final PublicReentrantReadWriteLock lock =
526	>	new PublicReentrantReadWriteLock(true);
527	>	final AtomicBoolean t1GotLock = new AtomicBoolean(false);
528	>
529	>	lock.readLock().lock();
530		Thread t1 = newStartedThread(new CheckedRunnable() {
531		public void realRun() {
532	<	lock.readLock().lock();
533	<	lock.readLock().unlock();
532	>	assertEquals(1, lock.getReadLockCount());
533	>	lock.writeLock().lock();
534	>	assertEquals(0, lock.getReadLockCount());
535	>	t1GotLock.set(true);
536	>	lock.writeLock().unlock();
537		}});
538	+	waitForQueuedThread(lock, t1);
539	+
540		Thread t2 = newStartedThread(new CheckedRunnable() {
541		public void realRun() {
542	+	assertEquals(1, lock.getReadLockCount());
543		lock.readLock().lock();
544	+	assertEquals(1, lock.getReadLockCount());
545	+	assertTrue(t1GotLock.get());
546		lock.readLock().unlock();
547		}});
548	<
549	<	Thread.sleep(SHORT_DELAY_MS);
550	<	lock.writeLock().unlock();
551	<	awaitTermination(t1, LONG_DELAY_MS);
355	<	awaitTermination(t2, LONG_DELAY_MS);
356	<	}
357	<
358	<	/**
359	<	* Read trylock succeeds if write locked by current thread
360	<	*/
361	<	public void testReadHoldingWriteLock() {
362	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
363	<	lock.writeLock().lock();
364	<	assertTrue(lock.readLock().tryLock());
548	>	waitForQueuedThread(lock, t2);
549	>	assertTrue(t1.isAlive());
550	>	assertNotWriteLocked(lock);
551	>	assertEquals(1, lock.getReadLockCount());
552		lock.readLock().unlock();
553	<	lock.writeLock().unlock();
553	>	awaitTermination(t1);
554	>	awaitTermination(t2);
555	>	assertNotWriteLocked(lock);
556		}
557
558		/**
559	<	* Read lock succeeds if write locked by current thread even if
371	<	* other threads are waiting for readlock
559	>	* Readlocks succeed only after a writing thread unlocks
560		*/
561	<	public void testReadHoldingWriteLock2() throws InterruptedException {
562	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
561	>	public void testReadAfterWriteLock() { testReadAfterWriteLock(false); }
562	>	public void testReadAfterWriteLock_fair() { testReadAfterWriteLock(true); }
563	>	public void testReadAfterWriteLock(boolean fair) {
564	>	final PublicReentrantReadWriteLock lock =
565	>	new PublicReentrantReadWriteLock(fair);
566		lock.writeLock().lock();
567		Thread t1 = newStartedThread(new CheckedRunnable() {
568		public void realRun() {
#	Line 384 \| Line 575 \| public class ReentrantReadWriteLockTest
575		lock.readLock().unlock();
576		}});
577
578	<	lock.readLock().lock();
579	<	lock.readLock().unlock();
580	<	Thread.sleep(SHORT_DELAY_MS);
581	<	lock.readLock().lock();
582	<	lock.readLock().unlock();
392	<	lock.writeLock().unlock();
393	<	awaitTermination(t1, LONG_DELAY_MS);
394	<	awaitTermination(t2, LONG_DELAY_MS);
578	>	waitForQueuedThread(lock, t1);
579	>	waitForQueuedThread(lock, t2);
580	>	releaseWriteLock(lock);
581	>	awaitTermination(t1);
582	>	awaitTermination(t2);
583		}
584
585		/**
586	<	* Read lock succeeds if write locked by current thread even if
399	<	* other threads are waiting for writelock
586	>	* Read trylock succeeds if write locked by current thread
587		*/
588	<	public void testReadHoldingWriteLock3() throws InterruptedException {
589	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
588	>	public void testReadHoldingWriteLock() { testReadHoldingWriteLock(false); }
589	>	public void testReadHoldingWriteLock_fair() { testReadHoldingWriteLock(true); }
590	>	public void testReadHoldingWriteLock(boolean fair) {
591	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
592		lock.writeLock().lock();
593	<	Thread t1 = newStartedThread(new CheckedRunnable() {
405	<	public void realRun() {
406	<	lock.writeLock().lock();
407	<	lock.writeLock().unlock();
408	<	}});
409	<	Thread t2 = newStartedThread(new CheckedRunnable() {
410	<	public void realRun() {
411	<	lock.writeLock().lock();
412	<	lock.writeLock().unlock();
413	<	}});
414	<
415	<	lock.readLock().lock();
416	<	lock.readLock().unlock();
417	<	Thread.sleep(SHORT_DELAY_MS);
418	<	lock.readLock().lock();
593	>	assertTrue(lock.readLock().tryLock());
594		lock.readLock().unlock();
595		lock.writeLock().unlock();
421	–	awaitTermination(t1, LONG_DELAY_MS);
422	–	awaitTermination(t2, LONG_DELAY_MS);
596		}
597
425	–
598		/**
599	<	* Write lock succeeds if write locked by current thread even if
600	<	* other threads are waiting for writelock
599	>	* Read trylock succeeds (barging) even in the presence of waiting
600	>	* readers and/or writers
601		*/
602	<	public void testWriteHoldingWriteLock4() throws InterruptedException {
603	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
604	<	lock.writeLock().lock();
602	>	public void testReadTryLockBarging() { testReadTryLockBarging(false); }
603	>	public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
604	>	public void testReadTryLockBarging(boolean fair) {
605	>	final PublicReentrantReadWriteLock lock =
606	>	new PublicReentrantReadWriteLock(fair);
607	>	lock.readLock().lock();
608	>
609		Thread t1 = newStartedThread(new CheckedRunnable() {
610		public void realRun() {
611		lock.writeLock().lock();
612		lock.writeLock().unlock();
613		}});
614	+
615	+	waitForQueuedThread(lock, t1);
616	+
617		Thread t2 = newStartedThread(new CheckedRunnable() {
618		public void realRun() {
619	<	lock.writeLock().lock();
620	<	lock.writeLock().unlock();
619	>	lock.readLock().lock();
620	>	lock.readLock().unlock();
621		}});
622
623	<	lock.writeLock().lock();
624	<	lock.writeLock().unlock();
446	<	Thread.sleep(SHORT_DELAY_MS);
447	<	lock.writeLock().lock();
448	<	lock.writeLock().unlock();
449	<	lock.writeLock().unlock();
450	<	awaitTermination(t1, LONG_DELAY_MS);
451	<	awaitTermination(t2, LONG_DELAY_MS);
452	<	}
623	>	if (fair)
624	>	waitForQueuedThread(lock, t2);
625
626	+	Thread t3 = newStartedThread(new CheckedRunnable() {
627	+	public void realRun() {
628	+	lock.readLock().tryLock();
629	+	lock.readLock().unlock();
630	+	}});
631
632	<	/**
633	<	* Fair Read trylock succeeds if write locked by current thread
634	<	*/
635	<	public void testReadHoldingWriteLockFair() {
459	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
460	<	lock.writeLock().lock();
461	<	assertTrue(lock.readLock().tryLock());
632	>	assertTrue(lock.getReadLockCount() > 0);
633	>	awaitTermination(t3);
634	>	assertTrue(t1.isAlive());
635	>	if (fair) assertTrue(t2.isAlive());
636		lock.readLock().unlock();
637	<	lock.writeLock().unlock();
637	>	awaitTermination(t1);
638	>	awaitTermination(t2);
639		}
640
641		/**
642	<	* Fair Read lock succeeds if write locked by current thread even if
642	>	* Read lock succeeds if write locked by current thread even if
643		* other threads are waiting for readlock
644		*/
645	<	public void testReadHoldingWriteLockFair2() throws InterruptedException {
646	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
645	>	public void testReadHoldingWriteLock2() { testReadHoldingWriteLock2(false); }
646	>	public void testReadHoldingWriteLock2_fair() { testReadHoldingWriteLock2(true); }
647	>	public void testReadHoldingWriteLock2(boolean fair) {
648	>	final PublicReentrantReadWriteLock lock =
649	>	new PublicReentrantReadWriteLock(fair);
650		lock.writeLock().lock();
651	+	lock.readLock().lock();
652	+	lock.readLock().unlock();
653	+
654		Thread t1 = newStartedThread(new CheckedRunnable() {
655		public void realRun() {
656		lock.readLock().lock();
#	Line 481 \| Line 662 \| public class ReentrantReadWriteLockTest
662		lock.readLock().unlock();
663		}});
664
665	+	waitForQueuedThread(lock, t1);
666	+	waitForQueuedThread(lock, t2);
667	+	assertWriteLockedByMoi(lock);
668		lock.readLock().lock();
669		lock.readLock().unlock();
670	<	Thread.sleep(SHORT_DELAY_MS);
671	<	lock.readLock().lock();
672	<	lock.readLock().unlock();
489	<	lock.writeLock().unlock();
490	<	awaitTermination(t1, LONG_DELAY_MS);
491	<	awaitTermination(t2, LONG_DELAY_MS);
670	>	releaseWriteLock(lock);
671	>	awaitTermination(t1);
672	>	awaitTermination(t2);
673		}
674
494	–
675		/**
676	<	* Fair Read lock succeeds if write locked by current thread even if
676	>	* Read lock succeeds if write locked by current thread even if
677		* other threads are waiting for writelock
678		*/
679	<	public void testReadHoldingWriteLockFair3() throws InterruptedException {
680	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
679	>	public void testReadHoldingWriteLock3() { testReadHoldingWriteLock3(false); }
680	>	public void testReadHoldingWriteLock3_fair() { testReadHoldingWriteLock3(true); }
681	>	public void testReadHoldingWriteLock3(boolean fair) {
682	>	final PublicReentrantReadWriteLock lock =
683	>	new PublicReentrantReadWriteLock(fair);
684		lock.writeLock().lock();
685	+	lock.readLock().lock();
686	+	lock.readLock().unlock();
687	+
688		Thread t1 = newStartedThread(new CheckedRunnable() {
689		public void realRun() {
690		lock.writeLock().lock();
#	Line 510 \| Line 696 \| public class ReentrantReadWriteLockTest
696		lock.writeLock().unlock();
697		}});
698
699	+	waitForQueuedThread(lock, t1);
700	+	waitForQueuedThread(lock, t2);
701	+	assertWriteLockedByMoi(lock);
702		lock.readLock().lock();
703		lock.readLock().unlock();
704	<	Thread.sleep(SHORT_DELAY_MS);
516	<	lock.readLock().lock();
517	<	lock.readLock().unlock();
704	>	assertWriteLockedByMoi(lock);
705		lock.writeLock().unlock();
706	<	awaitTermination(t1, LONG_DELAY_MS);
707	<	awaitTermination(t2, LONG_DELAY_MS);
706	>	awaitTermination(t1);
707	>	awaitTermination(t2);
708		}
709
523	–
710		/**
711	<	* Fair Write lock succeeds if write locked by current thread even if
711	>	* Write lock succeeds if write locked by current thread even if
712		* other threads are waiting for writelock
713		*/
714	<	public void testWriteHoldingWriteLockFair4() throws InterruptedException {
715	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
714	>	public void testWriteHoldingWriteLock4() { testWriteHoldingWriteLock4(false); }
715	>	public void testWriteHoldingWriteLock4_fair() { testWriteHoldingWriteLock4(true); }
716	>	public void testWriteHoldingWriteLock4(boolean fair) {
717	>	final PublicReentrantReadWriteLock lock =
718	>	new PublicReentrantReadWriteLock(fair);
719	>	lock.writeLock().lock();
720		lock.writeLock().lock();
721	+	lock.writeLock().unlock();
722	+
723		Thread t1 = newStartedThread(new CheckedRunnable() {
724		public void realRun() {
725		lock.writeLock().lock();
#	Line 539 \| Line 731 \| public class ReentrantReadWriteLockTest
731		lock.writeLock().unlock();
732		}});
733
734	<	Thread.sleep(SHORT_DELAY_MS);
735	<	assertTrue(lock.isWriteLockedByCurrentThread());
734	>	waitForQueuedThread(lock, t1);
735	>	waitForQueuedThread(lock, t2);
736	>	assertWriteLockedByMoi(lock);
737		assertEquals(1, lock.getWriteHoldCount());
738		lock.writeLock().lock();
739	+	assertWriteLockedByMoi(lock);
740		assertEquals(2, lock.getWriteHoldCount());
741		lock.writeLock().unlock();
742	<	lock.writeLock().lock();
743	<	lock.writeLock().unlock();
742	>	assertWriteLockedByMoi(lock);
743	>	assertEquals(1, lock.getWriteHoldCount());
744		lock.writeLock().unlock();
745	<	awaitTermination(t1, LONG_DELAY_MS);
746	<	awaitTermination(t2, LONG_DELAY_MS);
745	>	awaitTermination(t1);
746	>	awaitTermination(t2);
747		}
748
555	–
749		/**
750		* Read tryLock succeeds if readlocked but not writelocked
751		*/
752	<	public void testTryLockWhenReadLocked() throws InterruptedException {
753	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
752	>	public void testTryLockWhenReadLocked() { testTryLockWhenReadLocked(false); }
753	>	public void testTryLockWhenReadLocked_fair() { testTryLockWhenReadLocked(true); }
754	>	public void testTryLockWhenReadLocked(boolean fair) {
755	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
756		lock.readLock().lock();
757		Thread t = newStartedThread(new CheckedRunnable() {
758		public void realRun() {
#	Line 565 \| Line 760 \| public class ReentrantReadWriteLockTest
760		lock.readLock().unlock();
761		}});
762
763	<	awaitTermination(t, LONG_DELAY_MS);
763	>	awaitTermination(t);
764		lock.readLock().unlock();
765		}
766
767		/**
768		* write tryLock fails when readlocked
769		*/
770	<	public void testWriteTryLockWhenReadLocked() throws InterruptedException {
771	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
770	>	public void testWriteTryLockWhenReadLocked() { testWriteTryLockWhenReadLocked(false); }
771	>	public void testWriteTryLockWhenReadLocked_fair() { testWriteTryLockWhenReadLocked(true); }
772	>	public void testWriteTryLockWhenReadLocked(boolean fair) {
773	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
774		lock.readLock().lock();
775		Thread t = newStartedThread(new CheckedRunnable() {
776		public void realRun() {
777		assertFalse(lock.writeLock().tryLock());
778		}});
779
780	<	awaitTermination(t, LONG_DELAY_MS);
584	<	lock.readLock().unlock();
585	<	}
586	<
587	<
588	<	/**
589	<	* Fair Read tryLock succeeds if readlocked but not writelocked
590	<	*/
591	<	public void testTryLockWhenReadLockedFair() throws InterruptedException {
592	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
593	<	lock.readLock().lock();
594	<	Thread t = newStartedThread(new CheckedRunnable() {
595	<	public void realRun() {
596	<	assertTrue(lock.readLock().tryLock());
597	<	lock.readLock().unlock();
598	<	}});
599	<
600	<	awaitTermination(t, LONG_DELAY_MS);
780	>	awaitTermination(t);
781		lock.readLock().unlock();
782		}
783
604	–
605	–
606	–	/**
607	–	* Fair write tryLock fails when readlocked
608	–	*/
609	–	public void testWriteTryLockWhenReadLockedFair() throws InterruptedException {
610	–	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
611	–	lock.readLock().lock();
612	–	Thread t = newStartedThread(new CheckedRunnable() {
613	–	public void realRun() {
614	–	assertFalse(lock.writeLock().tryLock());
615	–	}});
616	–
617	–	awaitTermination(t, LONG_DELAY_MS);
618	–	lock.readLock().unlock();
619	–	}
620	–
621	–
622	–
784		/**
785		* write timed tryLock times out if locked
786		*/
787	<	public void testWriteTryLock_Timeout() throws InterruptedException {
788	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
787	>	public void testWriteTryLock_Timeout() { testWriteTryLock_Timeout(false); }
788	>	public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
789	>	public void testWriteTryLock_Timeout(boolean fair) {
790	>	final PublicReentrantReadWriteLock lock =
791	>	new PublicReentrantReadWriteLock(fair);
792	>	final long timeoutMillis = timeoutMillis();
793		lock.writeLock().lock();
794		Thread t = newStartedThread(new CheckedRunnable() {
795		public void realRun() throws InterruptedException {
796	<	assertFalse(lock.writeLock().tryLock(1, MILLISECONDS));
796	>	long startTime = System.nanoTime();
797	>	assertFalse(lock.writeLock().tryLock(timeoutMillis, MILLISECONDS));
798	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
799		}});
800
801	<	awaitTermination(t, LONG_DELAY_MS);
802	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
636	<	lock.writeLock().unlock();
801	>	awaitTermination(t);
802	>	releaseWriteLock(lock);
803		}
804
805		/**
806		* read timed tryLock times out if write-locked
807		*/
808	<	public void testReadTryLock_Timeout() throws InterruptedException {
809	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
808	>	public void testReadTryLock_Timeout() { testReadTryLock_Timeout(false); }
809	>	public void testReadTryLock_Timeout_fair() { testReadTryLock_Timeout(true); }
810	>	public void testReadTryLock_Timeout(boolean fair) {
811	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
812		lock.writeLock().lock();
813		Thread t = newStartedThread(new CheckedRunnable() {
814		public void realRun() throws InterruptedException {
815	<	assertFalse(lock.readLock().tryLock(1, MILLISECONDS));
815	>	long startTime = System.nanoTime();
816	>	long timeoutMillis = timeoutMillis();
817	>	assertFalse(lock.readLock().tryLock(timeoutMillis, MILLISECONDS));
818	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
819		}});
820
821	<	awaitTermination(t, LONG_DELAY_MS);
821	>	awaitTermination(t);
822		assertTrue(lock.writeLock().isHeldByCurrentThread());
823		lock.writeLock().unlock();
824		}
825
655	–
826		/**
827	<	* write lockInterruptibly succeeds if lock free else is interruptible
827	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
828		*/
829	<	public void testWriteLockInterruptibly() throws InterruptedException {
830	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
831	<	lock.writeLock().lockInterruptibly();
829	>	public void testWriteLockInterruptibly() { testWriteLockInterruptibly(false); }
830	>	public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
831	>	public void testWriteLockInterruptibly(boolean fair) {
832	>	final PublicReentrantReadWriteLock lock =
833	>	new PublicReentrantReadWriteLock(fair);
834	>	try {
835	>	lock.writeLock().lockInterruptibly();
836	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
837		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
838		public void realRun() throws InterruptedException {
839		lock.writeLock().lockInterruptibly();
840		}});
841
842	<	Thread.sleep(SHORT_DELAY_MS);
842	>	waitForQueuedThread(lock, t);
843		t.interrupt();
844	<	awaitTermination(t, LONG_DELAY_MS);
845	<	releaseLock(lock.writeLock());
844	>	assertTrue(lock.writeLock().isHeldByCurrentThread());
845	>	awaitTermination(t);
846	>	releaseWriteLock(lock);
847		}
848
849		/**
850		* read lockInterruptibly succeeds if lock free else is interruptible
851		*/
852	<	public void testReadLockInterruptibly() throws InterruptedException {
853	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
854	<	lock.writeLock().lockInterruptibly();
852	>	public void testReadLockInterruptibly() { testReadLockInterruptibly(false); }
853	>	public void testReadLockInterruptibly_fair() { testReadLockInterruptibly(true); }
854	>	public void testReadLockInterruptibly(boolean fair) {
855	>	final PublicReentrantReadWriteLock lock =
856	>	new PublicReentrantReadWriteLock(fair);
857	>	try {
858	>	lock.readLock().lockInterruptibly();
859	>	lock.readLock().unlock();
860	>	lock.writeLock().lockInterruptibly();
861	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
862		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
863		public void realRun() throws InterruptedException {
864		lock.readLock().lockInterruptibly();
865		}});
866
867	<	Thread.sleep(SHORT_DELAY_MS);
867	>	waitForQueuedThread(lock, t);
868		t.interrupt();
869	<	awaitTermination(t, LONG_DELAY_MS);
870	<	releaseLock(lock.writeLock());
869	>	awaitTermination(t);
870	>	releaseWriteLock(lock);
871		}
872
873		/**
874		* Calling await without holding lock throws IllegalMonitorStateException
875		*/
876	<	public void testAwait_IllegalMonitor() throws InterruptedException {
877	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
876	>	public void testAwait_IMSE() { testAwait_IMSE(false); }
877	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
878	>	public void testAwait_IMSE(boolean fair) {
879	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
880	>	final Condition c = lock.writeLock().newCondition();
881	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
882	>	long startTime = System.nanoTime();
883	>	try {
884	>	await(c, awaitMethod);
885	>	shouldThrow();
886	>	} catch (IllegalMonitorStateException success) {
887	>	} catch (InterruptedException fail) {
888	>	threadUnexpectedException(fail);
889	>	}
890	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
891	>	}
892	>	}
893	>
894	>	/**
895	>	* Calling signal without holding lock throws IllegalMonitorStateException
896	>	*/
897	>	public void testSignal_IMSE() { testSignal_IMSE(false); }
898	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
899	>	public void testSignal_IMSE(boolean fair) {
900	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
901		final Condition c = lock.writeLock().newCondition();
902		try {
903	<	c.await();
903	>	c.signal();
904		shouldThrow();
905		} catch (IllegalMonitorStateException success) {}
906		}
907
908		/**
909	<	* Calling signal without holding lock throws IllegalMonitorStateException
909	>	* Calling signalAll without holding lock throws IllegalMonitorStateException
910		*/
911	<	public void testSignal_IllegalMonitor() {
912	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
911	>	public void testSignalAll_IMSE() { testSignalAll_IMSE(false); }
912	>	public void testSignalAll_IMSE_fair() { testSignalAll_IMSE(true); }
913	>	public void testSignalAll_IMSE(boolean fair) {
914	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
915		final Condition c = lock.writeLock().newCondition();
916		try {
917	<	c.signal();
917	>	c.signalAll();
918		shouldThrow();
919		} catch (IllegalMonitorStateException success) {}
920		}
#	Line 714 \| Line 922 \| public class ReentrantReadWriteLockTest
922		/**
923		* awaitNanos without a signal times out
924		*/
925	<	public void testAwaitNanos_Timeout() throws InterruptedException {
926	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
925	>	public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); }
926	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
927	>	public void testAwaitNanos_Timeout(boolean fair) {
928	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
929		final Condition c = lock.writeLock().newCondition();
930	<
930	>	final long timeoutMillis = timeoutMillis();
931		lock.writeLock().lock();
932	<	long t = c.awaitNanos(100);
933	<	assertTrue(t <= 0);
932	>	final long startTime = System.nanoTime();
933	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
934	>	try {
935	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
936	>	assertTrue(nanosRemaining <= 0);
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
939		lock.writeLock().unlock();
940		}
941
727	–
942		/**
943		* timed await without a signal times out
944		*/
945	<	public void testAwait_Timeout() throws InterruptedException {
946	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
949		final Condition c = lock.writeLock().newCondition();
950	+	final long timeoutMillis = timeoutMillis();
951		lock.writeLock().lock();
952	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
952	>	final long startTime = System.nanoTime();
953	>	try {
954	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
955	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
956	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
957		lock.writeLock().unlock();
958		}
959
960		/**
961		* awaitUntil without a signal times out
962		*/
963	<	public void testAwaitUntil_Timeout() throws InterruptedException {
964	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
963	>	public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); }
964	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
965	>	public void testAwaitUntil_Timeout(boolean fair) {
966	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
967		final Condition c = lock.writeLock().newCondition();
968		lock.writeLock().lock();
969	<	java.util.Date d = new java.util.Date();
970	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
969	>	// We shouldn't assume that nanoTime and currentTimeMillis
970	>	// use the same time source, so don't use nanoTime here.
971	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
972	>	try {
973	>	assertFalse(c.awaitUntil(delayedDate));
974	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
975	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
976		lock.writeLock().unlock();
977		}
978
979		/**
980		* await returns when signalled
981		*/
982	<	public void testAwait() throws InterruptedException {
983	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
982	>	public void testAwait() { testAwait(false); }
983	>	public void testAwait_fair() { testAwait(true); }
984	>	public void testAwait(boolean fair) {
985	>	final PublicReentrantReadWriteLock lock =
986	>	new PublicReentrantReadWriteLock(fair);
987		final Condition c = lock.writeLock().newCondition();
988	+	final CountDownLatch locked = new CountDownLatch(1);
989		Thread t = newStartedThread(new CheckedRunnable() {
990		public void realRun() throws InterruptedException {
991		lock.writeLock().lock();
992	+	locked.countDown();
993		c.await();
994		lock.writeLock().unlock();
995		}});
996
997	<	Thread.sleep(SHORT_DELAY_MS);
997	>	await(locked);
998		lock.writeLock().lock();
999	+	assertHasWaiters(lock, c, t);
1000		c.signal();
1001	+	assertHasNoWaiters(lock, c);
1002	+	assertTrue(t.isAlive());
1003		lock.writeLock().unlock();
1004	<	awaitTermination(t, LONG_DELAY_MS);
769	<	}
770	<
771	<	/** A helper class for uninterruptible wait tests */
772	<	class UninterruptableThread extends Thread {
773	<	private Lock lock;
774	<	private Condition c;
775	<
776	<	public volatile boolean canAwake = false;
777	<	public volatile boolean interrupted = false;
778	<	public volatile boolean lockStarted = false;
779	<
780	<	public UninterruptableThread(Lock lock, Condition c) {
781	<	this.lock = lock;
782	<	this.c = c;
783	<	}
784	<
785	<	public synchronized void run() {
786	<	lock.lock();
787	<	lockStarted = true;
788	<
789	<	while (!canAwake) {
790	<	c.awaitUninterruptibly();
791	<	}
792	<
793	<	interrupted = isInterrupted();
794	<	lock.unlock();
795	<	}
1004	>	awaitTermination(t);
1005		}
1006
1007		/**
1008	<	* awaitUninterruptibly doesn't abort on interrupt
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010	<	public void testAwaitUninterruptibly() throws InterruptedException {
1011	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1012	<	final Condition c = lock.writeLock().newCondition();
1013	<	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1010	>	public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); }
1011	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012	>	public void testAwaitUninterruptibly(boolean fair) {
1013	>	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1014	>	final Condition condition = lock.newCondition();
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016
1017	<	thread.start();
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	// Interrupt before awaitUninterruptibly
1020	>	lock.lock();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023	>	condition.awaitUninterruptibly();
1024	>	assertTrue(Thread.interrupted());
1025	>	lock.unlock();
1026	>	}});
1027
1028	<	while (!thread.lockStarted) {
1029	<	Thread.sleep(100);
1030	<	}
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.lock();
1032	>	pleaseInterrupt.countDown();
1033	>	condition.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.unlock();
1036	>	}});
1037
1038	<	lock.writeLock().lock();
1039	<	try {
1040	<	thread.interrupt();
1041	<	thread.canAwake = true;
1042	<	c.signal();
1043	<	} finally {
818	<	lock.writeLock().unlock();
819	<	}
1038	>	await(pleaseInterrupt);
1039	>	t2.interrupt();
1040	>	lock.lock();
1041	>	lock.unlock();
1042	>	assertThreadBlocks(t1, Thread.State.WAITING);
1043	>	assertThreadBlocks(t2, Thread.State.WAITING);
1044
1045	<	awaitTermination(thread, LONG_DELAY_MS);
1046	<	assertTrue(thread.interrupted);
1045	>	lock.lock();
1046	>	condition.signalAll();
1047	>	lock.unlock();
1048	>
1049	>	awaitTermination(t1);
1050	>	awaitTermination(t2);
1051		}
1052
1053		/**
1054	<	* await is interruptible
1054	>	* await/awaitNanos/awaitUntil is interruptible
1055		*/
1056	<	public void testAwait_Interrupt() throws InterruptedException {
1057	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1056	>	public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); }
1057	>	public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); }
1058	>	public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); }
1059	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); }
1060	>	public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); }
1061	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); }
1062	>	public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); }
1063	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); }
1064	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
1065	>	final PublicReentrantReadWriteLock lock =
1066	>	new PublicReentrantReadWriteLock(fair);
1067		final Condition c = lock.writeLock().newCondition();
1068		final CountDownLatch locked = new CountDownLatch(1);
1069		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1070		public void realRun() throws InterruptedException {
1071		lock.writeLock().lock();
1072	<	assertTrue(lock.isWriteLocked());
1072	>	assertWriteLockedByMoi(lock);
1073	>	assertHasNoWaiters(lock, c);
1074		locked.countDown();
1075	<	try { c.await(); }
1076	<	finally { lock.writeLock().unlock(); }
1075	>	try {
1076	>	await(c, awaitMethod);
1077	>	} finally {
1078	>	assertWriteLockedByMoi(lock);
1079	>	assertHasNoWaiters(lock, c);
1080	>	lock.writeLock().unlock();
1081	>	assertFalse(Thread.interrupted());
1082	>	}
1083		}});
1084
1085	<	locked.await();
1086	<	while (lock.isWriteLocked())
843	<	Thread.yield();
1085	>	await(locked);
1086	>	assertHasWaiters(lock, c, t);
1087		t.interrupt();
1088	<	awaitTermination(t, LONG_DELAY_MS);
1089	<	assertFalse(lock.isWriteLocked());
1088	>	awaitTermination(t);
1089	>	assertNotWriteLocked(lock);
1090		}
1091
1092		/**
1093	<	* awaitNanos is interruptible
1093	>	* signalAll wakes up all threads
1094		*/
1095	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1096	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1095	>	public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); }
1096	>	public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); }
1097	>	public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); }
1098	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); }
1099	>	public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); }
1100	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); }
1101	>	public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); }
1102	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); }
1103	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
1104	>	final PublicReentrantReadWriteLock lock =
1105	>	new PublicReentrantReadWriteLock(fair);
1106		final Condition c = lock.writeLock().newCondition();
1107	<	final CountDownLatch locked = new CountDownLatch(1);
1108	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1107	>	final CountDownLatch locked = new CountDownLatch(2);
1108	>	final Lock writeLock = lock.writeLock();
1109	>	class Awaiter extends CheckedRunnable {
1110		public void realRun() throws InterruptedException {
1111	<	lock.writeLock().lock();
859	<	assertTrue(lock.isWriteLocked());
1111	>	writeLock.lock();
1112		locked.countDown();
1113	<	try { c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); }
1114	<	finally { lock.writeLock().unlock(); }
1115	<	}});
1113	>	await(c, awaitMethod);
1114	>	writeLock.unlock();
1115	>	}
1116	>	}
1117
1118	<	locked.await();
1119	<	while (lock.isWriteLocked())
1120	<	Thread.yield();
1121	<	t.interrupt();
1122	<	awaitTermination(t, LONG_DELAY_MS);
1123	<	assertFalse(lock.isWriteLocked());
1118	>	Thread t1 = newStartedThread(new Awaiter());
1119	>	Thread t2 = newStartedThread(new Awaiter());
1120	>
1121	>	await(locked);
1122	>	writeLock.lock();
1123	>	assertHasWaiters(lock, c, t1, t2);
1124	>	c.signalAll();
1125	>	assertHasNoWaiters(lock, c);
1126	>	writeLock.unlock();
1127	>	awaitTermination(t1);
1128	>	awaitTermination(t2);
1129		}
1130
1131		/**
1132	<	* awaitUntil is interruptible
1132	>	* signal wakes up waiting threads in FIFO order
1133		*/
1134	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1135	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1134	>	public void testSignalWakesFifo() { testSignalWakesFifo(false); }
1135	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1136	>	public void testSignalWakesFifo(boolean fair) {
1137	>	final PublicReentrantReadWriteLock lock =
1138	>	new PublicReentrantReadWriteLock(fair);
1139		final Condition c = lock.writeLock().newCondition();
1140	<	final CountDownLatch locked = new CountDownLatch(1);
1141	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1140	>	final CountDownLatch locked1 = new CountDownLatch(1);
1141	>	final CountDownLatch locked2 = new CountDownLatch(1);
1142	>	final Lock writeLock = lock.writeLock();
1143	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1144		public void realRun() throws InterruptedException {
1145	<	lock.writeLock().lock();
1146	<	assertTrue(lock.isWriteLocked());
1147	<	locked.countDown();
1148	<	java.util.Date d = new java.util.Date();
886	<	try { c.awaitUntil(new java.util.Date(d.getTime() + 10000)); }
887	<	finally { lock.writeLock().unlock(); }
1145	>	writeLock.lock();
1146	>	locked1.countDown();
1147	>	c.await();
1148	>	writeLock.unlock();
1149		}});
1150
1151	<	locked.await();
1152	<	while (lock.isWriteLocked())
1153	<	Thread.yield();
1154	<	t.interrupt();
1155	<	awaitTermination(t, LONG_DELAY_MS);
1156	<	assertFalse(lock.isWriteLocked());
1151	>	await(locked1);
1152	>
1153	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1154	>	public void realRun() throws InterruptedException {
1155	>	writeLock.lock();
1156	>	locked2.countDown();
1157	>	c.await();
1158	>	writeLock.unlock();
1159	>	}});
1160	>
1161	>	await(locked2);
1162	>
1163	>	writeLock.lock();
1164	>	assertHasWaiters(lock, c, t1, t2);
1165	>	assertFalse(lock.hasQueuedThreads());
1166	>	c.signal();
1167	>	assertHasWaiters(lock, c, t2);
1168	>	assertTrue(lock.hasQueuedThread(t1));
1169	>	assertFalse(lock.hasQueuedThread(t2));
1170	>	c.signal();
1171	>	assertHasNoWaiters(lock, c);
1172	>	assertTrue(lock.hasQueuedThread(t1));
1173	>	assertTrue(lock.hasQueuedThread(t2));
1174	>	writeLock.unlock();
1175	>	awaitTermination(t1);
1176	>	awaitTermination(t2);
1177		}
1178
1179		/**
1180	<	* signalAll wakes up all threads
1181	<	*/
1182	<	public void testSignalAll() throws InterruptedException {
1183	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1180	>	* await after multiple reentrant locking preserves lock count
1181	>	*/
1182	>	public void testAwaitLockCount() { testAwaitLockCount(false); }
1183	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1184	>	public void testAwaitLockCount(boolean fair) {
1185	>	final PublicReentrantReadWriteLock lock =
1186	>	new PublicReentrantReadWriteLock(fair);
1187		final Condition c = lock.writeLock().newCondition();
1188	+	final CountDownLatch locked = new CountDownLatch(2);
1189		Thread t1 = newStartedThread(new CheckedRunnable() {
1190		public void realRun() throws InterruptedException {
1191		lock.writeLock().lock();
1192	+	assertWriteLockedByMoi(lock);
1193	+	assertEquals(1, lock.writeLock().getHoldCount());
1194	+	locked.countDown();
1195		c.await();
1196	+	assertWriteLockedByMoi(lock);
1197	+	assertEquals(1, lock.writeLock().getHoldCount());
1198		lock.writeLock().unlock();
1199		}});
1200
1201		Thread t2 = newStartedThread(new CheckedRunnable() {
1202		public void realRun() throws InterruptedException {
1203		lock.writeLock().lock();
1204	+	lock.writeLock().lock();
1205	+	assertWriteLockedByMoi(lock);
1206	+	assertEquals(2, lock.writeLock().getHoldCount());
1207	+	locked.countDown();
1208		c.await();
1209	+	assertWriteLockedByMoi(lock);
1210	+	assertEquals(2, lock.writeLock().getHoldCount());
1211	+	lock.writeLock().unlock();
1212		lock.writeLock().unlock();
1213		}});
1214
1215	<	Thread.sleep(SHORT_DELAY_MS);
1215	>	await(locked);
1216		lock.writeLock().lock();
1217	+	assertHasWaiters(lock, c, t1, t2);
1218		c.signalAll();
1219	+	assertHasNoWaiters(lock, c);
1220		lock.writeLock().unlock();
1221	<	awaitTermination(t1, LONG_DELAY_MS);
1222	<	awaitTermination(t2, LONG_DELAY_MS);
1221	>	awaitTermination(t1);
1222	>	awaitTermination(t2);
1223		}
1224
1225		/**
1226		* A serialized lock deserializes as unlocked
1227		*/
1228	<	public void testSerialization() throws Exception {
1229	<	ReentrantReadWriteLock l = new ReentrantReadWriteLock();
1230	<	l.readLock().lock();
1231	<	l.readLock().unlock();
1232	<
1233	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1234	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1235	<	out.writeObject(l);
1236	<	out.close();
1237	<
1238	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1239	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1240	<	ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject();
1241	<	r.readLock().lock();
1242	<	r.readLock().unlock();
1228	>	public void testSerialization() { testSerialization(false); }
1229	>	public void testSerialization_fair() { testSerialization(true); }
1230	>	public void testSerialization(boolean fair) {
1231	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1232	>	lock.writeLock().lock();
1233	>	lock.readLock().lock();
1234	>
1235	>	ReentrantReadWriteLock clone = serialClone(lock);
1236	>	assertEquals(lock.isFair(), clone.isFair());
1237	>	assertTrue(lock.isWriteLocked());
1238	>	assertFalse(clone.isWriteLocked());
1239	>	assertEquals(1, lock.getReadLockCount());
1240	>	assertEquals(0, clone.getReadLockCount());
1241	>	clone.writeLock().lock();
1242	>	clone.readLock().lock();
1243	>	assertTrue(clone.isWriteLocked());
1244	>	assertEquals(1, clone.getReadLockCount());
1245	>	clone.readLock().unlock();
1246	>	clone.writeLock().unlock();
1247	>	assertFalse(clone.isWriteLocked());
1248	>	assertEquals(1, lock.getReadLockCount());
1249	>	assertEquals(0, clone.getReadLockCount());
1250		}
1251
1252		/**
1253		* hasQueuedThreads reports whether there are waiting threads
1254		*/
1255	<	public void testhasQueuedThreads() throws InterruptedException {
1256	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1255	>	public void testHasQueuedThreads() { testHasQueuedThreads(false); }
1256	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
1257	>	public void testHasQueuedThreads(boolean fair) {
1258	>	final PublicReentrantReadWriteLock lock =
1259	>	new PublicReentrantReadWriteLock(fair);
1260		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1261		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1262		assertFalse(lock.hasQueuedThreads());
1263		lock.writeLock().lock();
1264	+	assertFalse(lock.hasQueuedThreads());
1265		t1.start();
1266	<	Thread.sleep(SHORT_DELAY_MS);
1266	>	waitForQueuedThread(lock, t1);
1267		assertTrue(lock.hasQueuedThreads());
1268		t2.start();
1269	<	Thread.sleep(SHORT_DELAY_MS);
1269	>	waitForQueuedThread(lock, t2);
1270		assertTrue(lock.hasQueuedThreads());
1271		t1.interrupt();
1272	<	Thread.sleep(SHORT_DELAY_MS);
1272	>	awaitTermination(t1);
1273		assertTrue(lock.hasQueuedThreads());
1274		lock.writeLock().unlock();
1275	<	Thread.sleep(SHORT_DELAY_MS);
1275	>	awaitTermination(t2);
1276		assertFalse(lock.hasQueuedThreads());
967	–	awaitTermination(t1, LONG_DELAY_MS);
968	–	awaitTermination(t2, LONG_DELAY_MS);
1277		}
1278
1279		/**
1280		* hasQueuedThread(null) throws NPE
1281		*/
1282	<	public void testHasQueuedThreadNPE() {
1283	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1282	>	public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); }
1283	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
1284	>	public void testHasQueuedThreadNPE(boolean fair) {
1285	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1286		try {
1287	<	sync.hasQueuedThread(null);
1287	>	lock.hasQueuedThread(null);
1288		shouldThrow();
1289		} catch (NullPointerException success) {}
1290		}
1291
1292		/**
1293	<	* hasQueuedThread reports whether a thread is queued.
1293	>	* hasQueuedThread reports whether a thread is queued
1294		*/
1295	<	public void testHasQueuedThread() throws InterruptedException {
1296	<	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1297	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1298	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1299	<	assertFalse(sync.hasQueuedThread(t1));
1300	<	assertFalse(sync.hasQueuedThread(t2));
1301	<	sync.writeLock().lock();
1295	>	public void testHasQueuedThread() { testHasQueuedThread(false); }
1296	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
1297	>	public void testHasQueuedThread(boolean fair) {
1298	>	final PublicReentrantReadWriteLock lock =
1299	>	new PublicReentrantReadWriteLock(fair);
1300	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1301	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1302	>	assertFalse(lock.hasQueuedThread(t1));
1303	>	assertFalse(lock.hasQueuedThread(t2));
1304	>	lock.writeLock().lock();
1305		t1.start();
1306	<	Thread.sleep(SHORT_DELAY_MS);
1307	<	assertTrue(sync.hasQueuedThread(t1));
1306	>	waitForQueuedThread(lock, t1);
1307	>	assertTrue(lock.hasQueuedThread(t1));
1308	>	assertFalse(lock.hasQueuedThread(t2));
1309		t2.start();
1310	<	Thread.sleep(SHORT_DELAY_MS);
1311	<	assertTrue(sync.hasQueuedThread(t1));
1312	<	assertTrue(sync.hasQueuedThread(t2));
1310	>	waitForQueuedThread(lock, t2);
1311	>	assertTrue(lock.hasQueuedThread(t1));
1312	>	assertTrue(lock.hasQueuedThread(t2));
1313		t1.interrupt();
1314	<	Thread.sleep(SHORT_DELAY_MS);
1315	<	assertFalse(sync.hasQueuedThread(t1));
1316	<	assertTrue(sync.hasQueuedThread(t2));
1317	<	sync.writeLock().unlock();
1318	<	Thread.sleep(SHORT_DELAY_MS);
1319	<	assertFalse(sync.hasQueuedThread(t1));
1320	<	Thread.sleep(SHORT_DELAY_MS);
1007	<	assertFalse(sync.hasQueuedThread(t2));
1008	<	awaitTermination(t1, LONG_DELAY_MS);
1009	<	awaitTermination(t2, LONG_DELAY_MS);
1314	>	awaitTermination(t1);
1315	>	assertFalse(lock.hasQueuedThread(t1));
1316	>	assertTrue(lock.hasQueuedThread(t2));
1317	>	lock.writeLock().unlock();
1318	>	awaitTermination(t2);
1319	>	assertFalse(lock.hasQueuedThread(t1));
1320	>	assertFalse(lock.hasQueuedThread(t2));
1321		}
1322
1012	–
1323		/**
1324		* getQueueLength reports number of waiting threads
1325		*/
1326	<	public void testGetQueueLength() throws InterruptedException {
1327	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1326	>	public void testGetQueueLength() { testGetQueueLength(false); }
1327	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
1328	>	public void testGetQueueLength(boolean fair) {
1329	>	final PublicReentrantReadWriteLock lock =
1330	>	new PublicReentrantReadWriteLock(fair);
1331		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1332		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1333		assertEquals(0, lock.getQueueLength());
1334		lock.writeLock().lock();
1335		t1.start();
1336	<	Thread.sleep(SHORT_DELAY_MS);
1336	>	waitForQueuedThread(lock, t1);
1337		assertEquals(1, lock.getQueueLength());
1338		t2.start();
1339	<	Thread.sleep(SHORT_DELAY_MS);
1339	>	waitForQueuedThread(lock, t2);
1340		assertEquals(2, lock.getQueueLength());
1341		t1.interrupt();
1342	<	Thread.sleep(SHORT_DELAY_MS);
1342	>	awaitTermination(t1);
1343		assertEquals(1, lock.getQueueLength());
1344		lock.writeLock().unlock();
1345	<	Thread.sleep(SHORT_DELAY_MS);
1345	>	awaitTermination(t2);
1346		assertEquals(0, lock.getQueueLength());
1034	–	awaitTermination(t1, LONG_DELAY_MS);
1035	–	awaitTermination(t2, LONG_DELAY_MS);
1347		}
1348
1349		/**
1350		* getQueuedThreads includes waiting threads
1351		*/
1352	<	public void testGetQueuedThreads() throws InterruptedException {
1353	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1352	>	public void testGetQueuedThreads() { testGetQueuedThreads(false); }
1353	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
1354	>	public void testGetQueuedThreads(boolean fair) {
1355	>	final PublicReentrantReadWriteLock lock =
1356	>	new PublicReentrantReadWriteLock(fair);
1357		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1358		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1359		assertTrue(lock.getQueuedThreads().isEmpty());
1360		lock.writeLock().lock();
1361		assertTrue(lock.getQueuedThreads().isEmpty());
1362		t1.start();
1363	<	Thread.sleep(SHORT_DELAY_MS);
1363	>	waitForQueuedThread(lock, t1);
1364	>	assertEquals(1, lock.getQueuedThreads().size());
1365		assertTrue(lock.getQueuedThreads().contains(t1));
1366		t2.start();
1367	<	Thread.sleep(SHORT_DELAY_MS);
1367	>	waitForQueuedThread(lock, t2);
1368	>	assertEquals(2, lock.getQueuedThreads().size());
1369		assertTrue(lock.getQueuedThreads().contains(t1));
1370		assertTrue(lock.getQueuedThreads().contains(t2));
1371		t1.interrupt();
1372	<	Thread.sleep(SHORT_DELAY_MS);
1372	>	awaitTermination(t1);
1373		assertFalse(lock.getQueuedThreads().contains(t1));
1374		assertTrue(lock.getQueuedThreads().contains(t2));
1375	+	assertEquals(1, lock.getQueuedThreads().size());
1376		lock.writeLock().unlock();
1377	<	Thread.sleep(SHORT_DELAY_MS);
1377	>	awaitTermination(t2);
1378		assertTrue(lock.getQueuedThreads().isEmpty());
1062	–	awaitTermination(t1, LONG_DELAY_MS);
1063	–	awaitTermination(t2, LONG_DELAY_MS);
1379		}
1380
1381		/**
1382		* hasWaiters throws NPE if null
1383		*/
1384	<	public void testHasWaitersNPE() {
1385	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1384	>	public void testHasWaitersNPE() { testHasWaitersNPE(false); }
1385	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
1386	>	public void testHasWaitersNPE(boolean fair) {
1387	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1388		try {
1389		lock.hasWaiters(null);
1390		shouldThrow();
#	Line 1077 \| Line 1394 \| public class ReentrantReadWriteLockTest
1394		/**
1395		* getWaitQueueLength throws NPE if null
1396		*/
1397	<	public void testGetWaitQueueLengthNPE() {
1398	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	>	public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); }
1398	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
1399	>	public void testGetWaitQueueLengthNPE(boolean fair) {
1400	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1401		try {
1402		lock.getWaitQueueLength(null);
1403		shouldThrow();
1404		} catch (NullPointerException success) {}
1405		}
1406
1088	–
1407		/**
1408		* getWaitingThreads throws NPE if null
1409		*/
1410	<	public void testGetWaitingThreadsNPE() {
1411	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1410	>	public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); }
1411	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
1412	>	public void testGetWaitingThreadsNPE(boolean fair) {
1413	>	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(fair);
1414		try {
1415		lock.getWaitingThreads(null);
1416		shouldThrow();
#	Line 1098 \| Line 1418 \| public class ReentrantReadWriteLockTest
1418		}
1419
1420		/**
1421	<	* hasWaiters throws IAE if not owned
1421	>	* hasWaiters throws IllegalArgumentException if not owned
1422		*/
1423	<	public void testHasWaitersIAE() {
1424	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1423	>	public void testHasWaitersIAE() { testHasWaitersIAE(false); }
1424	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
1425	>	public void testHasWaitersIAE(boolean fair) {
1426	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1427		final Condition c = lock.writeLock().newCondition();
1428	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1428	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1429		try {
1430		lock2.hasWaiters(c);
1431		shouldThrow();
#	Line 1111 \| Line 1433 \| public class ReentrantReadWriteLockTest
1433		}
1434
1435		/**
1436	<	* hasWaiters throws IMSE if not locked
1436	>	* hasWaiters throws IllegalMonitorStateException if not locked
1437		*/
1438	<	public void testHasWaitersIMSE() {
1439	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1438	>	public void testHasWaitersIMSE() { testHasWaitersIMSE(false); }
1439	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
1440	>	public void testHasWaitersIMSE(boolean fair) {
1441	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1442		final Condition c = lock.writeLock().newCondition();
1443		try {
1444		lock.hasWaiters(c);
#	Line 1122 \| Line 1446 \| public class ReentrantReadWriteLockTest
1446		} catch (IllegalMonitorStateException success) {}
1447		}
1448
1125	–
1449		/**
1450	<	* getWaitQueueLength throws IAE if not owned
1450	>	* getWaitQueueLength throws IllegalArgumentException if not owned
1451		*/
1452	<	public void testGetWaitQueueLengthIAE() {
1453	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1452	>	public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); }
1453	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
1454	>	public void testGetWaitQueueLengthIAE(boolean fair) {
1455	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1456		final Condition c = lock.writeLock().newCondition();
1457	<	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1457	>	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(fair);
1458		try {
1459		lock2.getWaitQueueLength(c);
1460		shouldThrow();
#	Line 1137 \| Line 1462 \| public class ReentrantReadWriteLockTest
1462		}
1463
1464		/**
1465	<	* getWaitQueueLength throws IMSE if not locked
1465	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
1466		*/
1467	<	public void testGetWaitQueueLengthIMSE() {
1468	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1467	>	public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); }
1468	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
1469	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
1470	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1471		final Condition c = lock.writeLock().newCondition();
1472		try {
1473		lock.getWaitQueueLength(c);
#	Line 1148 \| Line 1475 \| public class ReentrantReadWriteLockTest
1475		} catch (IllegalMonitorStateException success) {}
1476		}
1477
1151	–
1478		/**
1479	<	* getWaitingThreads throws IAE if not owned
1479	>	* getWaitingThreads throws IllegalArgumentException if not owned
1480		*/
1481	<	public void testGetWaitingThreadsIAE() {
1482	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1481	>	public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); }
1482	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
1483	>	public void testGetWaitingThreadsIAE(boolean fair) {
1484	>	final PublicReentrantReadWriteLock lock =
1485	>	new PublicReentrantReadWriteLock(fair);
1486		final Condition c = lock.writeLock().newCondition();
1487	<	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1487	>	final PublicReentrantReadWriteLock lock2 =
1488	>	new PublicReentrantReadWriteLock(fair);
1489		try {
1490		lock2.getWaitingThreads(c);
1491		shouldThrow();
#	Line 1163 \| Line 1493 \| public class ReentrantReadWriteLockTest
1493		}
1494
1495		/**
1496	<	* getWaitingThreads throws IMSE if not locked
1496	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
1497		*/
1498	<	public void testGetWaitingThreadsIMSE() {
1499	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1498	>	public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); }
1499	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
1500	>	public void testGetWaitingThreadsIMSE(boolean fair) {
1501	>	final PublicReentrantReadWriteLock lock =
1502	>	new PublicReentrantReadWriteLock(fair);
1503		final Condition c = lock.writeLock().newCondition();
1504		try {
1505		lock.getWaitingThreads(c);
#	Line 1174 \| Line 1507 \| public class ReentrantReadWriteLockTest
1507		} catch (IllegalMonitorStateException success) {}
1508		}
1509
1177	–
1510		/**
1511		* hasWaiters returns true when a thread is waiting, else false
1512		*/
1513	<	public void testHasWaiters() throws InterruptedException {
1514	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1513	>	public void testHasWaiters() { testHasWaiters(false); }
1514	>	public void testHasWaiters_fair() { testHasWaiters(true); }
1515	>	public void testHasWaiters(boolean fair) {
1516	>	final PublicReentrantReadWriteLock lock =
1517	>	new PublicReentrantReadWriteLock(fair);
1518		final Condition c = lock.writeLock().newCondition();
1519	+	final CountDownLatch locked = new CountDownLatch(1);
1520		Thread t = newStartedThread(new CheckedRunnable() {
1521		public void realRun() throws InterruptedException {
1522		lock.writeLock().lock();
1523	+	assertHasNoWaiters(lock, c);
1524		assertFalse(lock.hasWaiters(c));
1525	<	assertEquals(0, lock.getWaitQueueLength(c));
1525	>	locked.countDown();
1526		c.await();
1527	+	assertHasNoWaiters(lock, c);
1528	+	assertFalse(lock.hasWaiters(c));
1529		lock.writeLock().unlock();
1530		}});
1531
1532	<	Thread.sleep(SHORT_DELAY_MS);
1532	>	await(locked);
1533		lock.writeLock().lock();
1534	+	assertHasWaiters(lock, c, t);
1535		assertTrue(lock.hasWaiters(c));
1196	–	assertEquals(1, lock.getWaitQueueLength(c));
1536		c.signal();
1537	<	lock.writeLock().unlock();
1199	<	Thread.sleep(SHORT_DELAY_MS);
1200	<	lock.writeLock().lock();
1537	>	assertHasNoWaiters(lock, c);
1538		assertFalse(lock.hasWaiters(c));
1202	–	assertEquals(0, lock.getWaitQueueLength(c));
1539		lock.writeLock().unlock();
1540	<	awaitTermination(t, LONG_DELAY_MS);
1540	>	awaitTermination(t);
1541	>	assertHasNoWaiters(lock, c);
1542		}
1543
1544		/**
1545		* getWaitQueueLength returns number of waiting threads
1546		*/
1547	<	public void testGetWaitQueueLength() throws InterruptedException {
1548	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1547	>	public void testGetWaitQueueLength() { testGetWaitQueueLength(false); }
1548	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
1549	>	public void testGetWaitQueueLength(boolean fair) {
1550	>	final PublicReentrantReadWriteLock lock =
1551	>	new PublicReentrantReadWriteLock(fair);
1552		final Condition c = lock.writeLock().newCondition();
1553	+	final CountDownLatch locked = new CountDownLatch(1);
1554		Thread t = newStartedThread(new CheckedRunnable() {
1555		public void realRun() throws InterruptedException {
1556		lock.writeLock().lock();
1216	–	assertFalse(lock.hasWaiters(c));
1557		assertEquals(0, lock.getWaitQueueLength(c));
1558	+	locked.countDown();
1559		c.await();
1560		lock.writeLock().unlock();
1561		}});
1562
1563	<	Thread.sleep(SHORT_DELAY_MS);
1563	>	await(locked);
1564		lock.writeLock().lock();
1565	<	assertTrue(lock.hasWaiters(c));
1565	>	assertHasWaiters(lock, c, t);
1566		assertEquals(1, lock.getWaitQueueLength(c));
1567		c.signal();
1568	<	lock.writeLock().unlock();
1228	<	Thread.sleep(SHORT_DELAY_MS);
1229	<	lock.writeLock().lock();
1230	<	assertFalse(lock.hasWaiters(c));
1568	>	assertHasNoWaiters(lock, c);
1569		assertEquals(0, lock.getWaitQueueLength(c));
1570		lock.writeLock().unlock();
1571	<	awaitTermination(t, LONG_DELAY_MS);
1571	>	awaitTermination(t);
1572		}
1573
1236	–
1574		/**
1575		* getWaitingThreads returns only and all waiting threads
1576		*/
1577	<	public void testGetWaitingThreads() throws InterruptedException {
1578	<	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1577	>	public void testGetWaitingThreads() { testGetWaitingThreads(false); }
1578	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
1579	>	public void testGetWaitingThreads(boolean fair) {
1580	>	final PublicReentrantReadWriteLock lock =
1581	>	new PublicReentrantReadWriteLock(fair);
1582		final Condition c = lock.writeLock().newCondition();
1583	+	final CountDownLatch locked1 = new CountDownLatch(1);
1584	+	final CountDownLatch locked2 = new CountDownLatch(1);
1585		Thread t1 = new Thread(new CheckedRunnable() {
1586		public void realRun() throws InterruptedException {
1587		lock.writeLock().lock();
1588		assertTrue(lock.getWaitingThreads(c).isEmpty());
1589	+	locked1.countDown();
1590		c.await();
1591		lock.writeLock().unlock();
1592		}});
#	Line 1252 \| Line 1595 \| public class ReentrantReadWriteLockTest
1595		public void realRun() throws InterruptedException {
1596		lock.writeLock().lock();
1597		assertFalse(lock.getWaitingThreads(c).isEmpty());
1598	+	locked2.countDown();
1599		c.await();
1600		lock.writeLock().unlock();
1601		}});
#	Line 1259 \| Line 1603 \| public class ReentrantReadWriteLockTest
1603		lock.writeLock().lock();
1604		assertTrue(lock.getWaitingThreads(c).isEmpty());
1605		lock.writeLock().unlock();
1606	+
1607		t1.start();
1608	<	Thread.sleep(SHORT_DELAY_MS);
1608	>	await(locked1);
1609		t2.start();
1610	<	Thread.sleep(SHORT_DELAY_MS);
1610	>	await(locked2);
1611	>
1612		lock.writeLock().lock();
1613		assertTrue(lock.hasWaiters(c));
1614		assertTrue(lock.getWaitingThreads(c).contains(t1));
1615		assertTrue(lock.getWaitingThreads(c).contains(t2));
1616	+	assertEquals(2, lock.getWaitingThreads(c).size());
1617		c.signalAll();
1618	+	assertHasNoWaiters(lock, c);
1619		lock.writeLock().unlock();
1620	<	Thread.sleep(SHORT_DELAY_MS);
1621	<	lock.writeLock().lock();
1622	<	assertFalse(lock.hasWaiters(c));
1623	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
1624	<	lock.writeLock().unlock();
1277	<	awaitTermination(t1, LONG_DELAY_MS);
1278	<	awaitTermination(t2, LONG_DELAY_MS);
1620	>
1621	>	awaitTermination(t1);
1622	>	awaitTermination(t2);
1623	>
1624	>	assertHasNoWaiters(lock, c);
1625		}
1626
1627		/**
1628		* toString indicates current lock state
1629		*/
1630	<	public void testToString() {
1631	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1632	<	String us = lock.toString();
1633	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1634	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1635	<	lock.writeLock().lock();
1636	<	String ws = lock.toString();
1637	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1638	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1630	>	public void testToString() { testToString(false); }
1631	>	public void testToString_fair() { testToString(true); }
1632	>	public void testToString(boolean fair) {
1633	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1634	>	assertTrue(lock.toString().contains("Write locks = 0"));
1635	>	assertTrue(lock.toString().contains("Read locks = 0"));
1636	>	lock.writeLock().lock();
1637	>	assertTrue(lock.toString().contains("Write locks = 1"));
1638	>	assertTrue(lock.toString().contains("Read locks = 0"));
1639	>	lock.writeLock().lock();
1640	>	assertTrue(lock.toString().contains("Write locks = 2"));
1641	>	assertTrue(lock.toString().contains("Read locks = 0"));
1642	>	lock.writeLock().unlock();
1643		lock.writeLock().unlock();
1644		lock.readLock().lock();
1645	+	assertTrue(lock.toString().contains("Write locks = 0"));
1646	+	assertTrue(lock.toString().contains("Read locks = 1"));
1647		lock.readLock().lock();
1648	<	String rs = lock.toString();
1649	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1298	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1648	>	assertTrue(lock.toString().contains("Write locks = 0"));
1649	>	assertTrue(lock.toString().contains("Read locks = 2"));
1650		}
1651
1652		/**
1653		* readLock.toString indicates current lock state
1654		*/
1655	<	public void testReadLockToString() {
1656	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1657	<	String us = lock.readLock().toString();
1658	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1655	>	public void testReadLockToString() { testReadLockToString(false); }
1656	>	public void testReadLockToString_fair() { testReadLockToString(true); }
1657	>	public void testReadLockToString(boolean fair) {
1658	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1659	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1660		lock.readLock().lock();
1661	+	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1662		lock.readLock().lock();
1663	<	String rs = lock.readLock().toString();
1664	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1663	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1664	>	lock.readLock().unlock();
1665	>	assertTrue(lock.readLock().toString().contains("Read locks = 1"));
1666	>	lock.readLock().unlock();
1667	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1668		}
1669
1670		/**
1671		* writeLock.toString indicates current lock state
1672		*/
1673	<	public void testWriteLockToString() {
1674	<	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1675	<	String us = lock.writeLock().toString();
1676	<	assertTrue(us.indexOf("Unlocked") >= 0);
1677	<	lock.writeLock().lock();
1678	<	String ls = lock.writeLock().toString();
1679	<	assertTrue(ls.indexOf("Locked") >= 0);
1673	>	public void testWriteLockToString() { testWriteLockToString(false); }
1674	>	public void testWriteLockToString_fair() { testWriteLockToString(true); }
1675	>	public void testWriteLockToString(boolean fair) {
1676	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1677	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1678	>	lock.writeLock().lock();
1679	>	assertTrue(lock.writeLock().toString().contains("Locked by"));
1680	>	lock.writeLock().unlock();
1681	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1682		}
1683
1684	+	/**
1685	+	* ThreadMXBean reports the blockers that we expect.
1686	+	*/
1687	+	public void testBlockers() {
1688	+	if (!testImplementationDetails) return;
1689	+	final boolean fair = randomBoolean();
1690	+	final boolean timedAcquire = randomBoolean();
1691	+	final boolean timedAwait = randomBoolean();
1692	+	final String syncClassName = fair
1693	+	? "ReentrantReadWriteLock$FairSync"
1694	+	: "ReentrantReadWriteLock$NonfairSync";
1695	+	final String conditionClassName
1696	+	= "AbstractQueuedSynchronizer$ConditionObject";
1697	+	final Thread.State expectedAcquireState = timedAcquire
1698	+	? Thread.State.TIMED_WAITING
1699	+	: Thread.State.WAITING;
1700	+	final Thread.State expectedAwaitState = timedAwait
1701	+	? Thread.State.TIMED_WAITING
1702	+	: Thread.State.WAITING;
1703	+	final Lock lock = new ReentrantReadWriteLock(fair).writeLock();
1704	+	final Condition condition = lock.newCondition();
1705	+	final AtomicBoolean conditionSatisfied = new AtomicBoolean(false);
1706	+	lock.lock();
1707	+	final Thread thread = newStartedThread((Action) () -> {
1708	+	if (timedAcquire)
1709	+	lock.tryLock(LONGER_DELAY_MS, MILLISECONDS);
1710	+	else
1711	+	lock.lock();
1712	+	while (!conditionSatisfied.get())
1713	+	if (timedAwait)
1714	+	condition.await(LONGER_DELAY_MS, MILLISECONDS);
1715	+	else
1716	+	condition.await();
1717	+	});
1718	+	Callable<Boolean> waitingForLock = () -> {
1719	+	String className;
1720	+	return thread.getState() == expectedAcquireState
1721	+	&& (className = blockerClassName(thread)) != null
1722	+	&& className.endsWith(syncClassName);
1723	+	};
1724	+	waitForThreadToEnterWaitState(thread, waitingForLock);
1725	+
1726	+	lock.unlock();
1727	+	Callable<Boolean> waitingForCondition = () -> {
1728	+	String className;
1729	+	return thread.getState() == expectedAwaitState
1730	+	&& (className = blockerClassName(thread)) != null
1731	+	&& className.endsWith(conditionClassName);
1732	+	};
1733	+	waitForThreadToEnterWaitState(thread, waitingForCondition);
1734	+
1735	+	// politely release the waiter
1736	+	conditionSatisfied.set(true);
1737	+	lock.lock();
1738	+	try {
1739	+	condition.signal();
1740	+	} finally { lock.unlock(); }
1741	+
1742	+	awaitTermination(thread);
1743	+	}
1744		}

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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents): Revision 1.53 by jsr166, Mon May 2 00:49:26 2011 UTC vs. Revision 1.84 by jsr166, Thu Sep 26 20:48:53 2019 UTC

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Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.53 by jsr166, Mon May 2 00:49:26 2011 UTC vs.
Revision 1.84 by jsr166, Thu Sep 26 20:48:53 2019 UTC