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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.40 by dl, Fri May 6 11:22:07 2011 UTC vs.
Revision 1.58 by jsr166, Sat Apr 25 04:55:31 2015 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;
10	<	import java.util.*;
11	<	import java.io.*;
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.CyclicBarrier;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.ReentrantLock;
18	>
19	>	import junit.framework.AssertionFailedError;
20	>	import junit.framework.Test;
21	>	import junit.framework.TestSuite;
22
23		public class ReentrantLockTest extends JSR166TestCase {
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run(suite());
25	>	main(suite(), args);
26		}
27		public static Test suite() {
28		return new TestSuite(ReentrantLockTest.class);
29		}
30
31		/**
32	<	* A runnable calling lockInterruptibly
32	>	* A checked runnable calling lockInterruptibly
33		*/
34		class InterruptibleLockRunnable extends CheckedRunnable {
35		final ReentrantLock lock;
36	<	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
36	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
37		public void realRun() throws InterruptedException {
38		lock.lockInterruptibly();
39		}
40		}
41
35	–
42		/**
43	<	* A runnable calling lockInterruptibly that expects to be
43	>	* A checked runnable calling lockInterruptibly that expects to be
44		* interrupted
45		*/
46		class InterruptedLockRunnable extends CheckedInterruptedRunnable {
47		final ReentrantLock lock;
48	<	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
48	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
49		public void realRun() throws InterruptedException {
50		lock.lockInterruptibly();
51		}
#	Line 50 | Line 56 | public class ReentrantLockTest extends J
56		*/
57		static class PublicReentrantLock extends ReentrantLock {
58		PublicReentrantLock() { super(); }
59	+	PublicReentrantLock(boolean fair) { super(fair); }
60	+	public Thread getOwner() {
61	+	return super.getOwner();
62	+	}
63		public Collection<Thread> getQueuedThreads() {
64		return super.getQueuedThreads();
65		}
#	Line 59 | Line 69 | public class ReentrantLockTest extends J
69		}
70
71		/**
72	<	* Constructor sets given fairness
72	>	* Releases write lock, checking that it had a hold count of 1.
73		*/
74	<	public void testConstructor() {
75	<	assertFalse(new ReentrantLock().isFair());
76	<	assertFalse(new ReentrantLock(false).isFair());
77	<	assertTrue(new ReentrantLock(true).isFair());
74	>	void releaseLock(PublicReentrantLock lock) {
75	>	assertLockedByMoi(lock);
76	>	lock.unlock();
77	>	assertFalse(lock.isHeldByCurrentThread());
78	>	assertNotLocked(lock);
79		}
80
81		/**
82	<	* locking an unlocked lock succeeds
82	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
83	>	*/
84	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
85	>	long startTime = System.nanoTime();
86	>	while (!lock.hasQueuedThread(t)) {
87	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
88	>	throw new AssertionFailedError("timed out");
89	>	Thread.yield();
90	>	}
91	>	assertTrue(t.isAlive());
92	>	assertNotSame(t, lock.getOwner());
93	>	}
94	>
95	>	/**
96	>	* Checks that lock is not locked.
97	>	*/
98	>	void assertNotLocked(PublicReentrantLock lock) {
99	>	assertFalse(lock.isLocked());
100	>	assertFalse(lock.isHeldByCurrentThread());
101	>	assertNull(lock.getOwner());
102	>	assertEquals(0, lock.getHoldCount());
103	>	}
104	>
105	>	/**
106	>	* Checks that lock is locked by the given thread.
107	>	*/
108	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
109	>	assertTrue(lock.isLocked());
110	>	assertSame(t, lock.getOwner());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.isHeldByCurrentThread());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.getHoldCount() > 0);
115	>	}
116	>
117	>	/**
118	>	* Checks that lock is locked by the current thread.
119	>	*/
120	>	void assertLockedByMoi(PublicReentrantLock lock) {
121	>	assertLockedBy(lock, Thread.currentThread());
122	>	}
123	>
124	>	/**
125	>	* Checks that condition c has no waiters.
126	>	*/
127	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
128	>	assertHasWaiters(lock, c, new Thread[] {});
129	>	}
130	>
131	>	/**
132	>	* Checks that condition c has exactly the given waiter threads.
133	>	*/
134	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
135	>	Thread... threads) {
136	>	lock.lock();
137	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
138	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
139	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
140	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
141	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
142	>	new HashSet<Thread>(Arrays.asList(threads)));
143	>	lock.unlock();
144	>	}
145	>
146	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
147	>
148	>	/**
149	>	* Awaits condition using the specified AwaitMethod.
150		*/
151	<	public void testLock() {
152	<	ReentrantLock rl = new ReentrantLock();
153	<	rl.lock();
154	<	assertTrue(rl.isLocked());
155	<	rl.unlock();
156	<	assertFalse(rl.isLocked());
151	>	void await(Condition c, AwaitMethod awaitMethod)
152	>	throws InterruptedException {
153	>	long timeoutMillis = 2 * LONG_DELAY_MS;
154	>	switch (awaitMethod) {
155	>	case await:
156	>	c.await();
157	>	break;
158	>	case awaitTimed:
159	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
160	>	break;
161	>	case awaitNanos:
162	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
163	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
164	>	assertTrue(nanosRemaining > 0);
165	>	break;
166	>	case awaitUntil:
167	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
168	>	break;
169	>	default:
170	>	throw new AssertionError();
171	>	}
172		}
173
174		/**
175	<	* locking an unlocked fair lock succeeds
176	<	*/
177	<	public void testFairLock() {
178	<	ReentrantLock rl = new ReentrantLock(true);
179	<	rl.lock();
180	<	assertTrue(rl.isLocked());
181	<	rl.unlock();
175	>	* Constructor sets given fairness, and is in unlocked state
176	>	*/
177	>	public void testConstructor() {
178	>	PublicReentrantLock lock;
179	>
180	>	lock = new PublicReentrantLock();
181	>	assertFalse(lock.isFair());
182	>	assertNotLocked(lock);
183	>
184	>	lock = new PublicReentrantLock(true);
185	>	assertTrue(lock.isFair());
186	>	assertNotLocked(lock);
187	>
188	>	lock = new PublicReentrantLock(false);
189	>	assertFalse(lock.isFair());
190	>	assertNotLocked(lock);
191	>	}
192	>
193	>	/**
194	>	* locking an unlocked lock succeeds
195	>	*/
196	>	public void testLock()      { testLock(false); }
197	>	public void testLock_fair() { testLock(true); }
198	>	public void testLock(boolean fair) {
199	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
200	>	lock.lock();
201	>	assertLockedByMoi(lock);
202	>	releaseLock(lock);
203		}
204
205		/**
206		* Unlocking an unlocked lock throws IllegalMonitorStateException
207		*/
208	<	public void testUnlock_IllegalMonitorStateException() {
209	<	ReentrantLock rl = new ReentrantLock();
208	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
209	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
210	>	public void testUnlock_IMSE(boolean fair) {
211	>	ReentrantLock lock = new ReentrantLock(fair);
212		try {
213	<	rl.unlock();
213	>	lock.unlock();
214		shouldThrow();
215		} catch (IllegalMonitorStateException success) {}
216		}
#	Line 102 | Line 218 | public class ReentrantLockTest extends J
218		/**
219		* tryLock on an unlocked lock succeeds
220		*/
221	<	public void testTryLock() {
222	<	ReentrantLock rl = new ReentrantLock();
223	<	assertTrue(rl.tryLock());
224	<	assertTrue(rl.isLocked());
225	<	rl.unlock();
221	>	public void testTryLock()      { testTryLock(false); }
222	>	public void testTryLock_fair() { testTryLock(true); }
223	>	public void testTryLock(boolean fair) {
224	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
225	>	assertTrue(lock.tryLock());
226	>	assertLockedByMoi(lock);
227	>	assertTrue(lock.tryLock());
228	>	assertLockedByMoi(lock);
229	>	lock.unlock();
230	>	releaseLock(lock);
231		}
232
112	–
233		/**
234		* hasQueuedThreads reports whether there are waiting threads
235		*/
236	<	public void testhasQueuedThreads() throws InterruptedException {
237	<	final ReentrantLock lock = new ReentrantLock();
236	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
237	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
238	>	public void testHasQueuedThreads(boolean fair) {
239	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
240		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
241		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
242		assertFalse(lock.hasQueuedThreads());
243		lock.lock();
244	+	assertFalse(lock.hasQueuedThreads());
245		t1.start();
246	<	delay(SHORT_DELAY_MS);
246	>	waitForQueuedThread(lock, t1);
247		assertTrue(lock.hasQueuedThreads());
248		t2.start();
249	<	delay(SHORT_DELAY_MS);
249	>	waitForQueuedThread(lock, t2);
250		assertTrue(lock.hasQueuedThreads());
251		t1.interrupt();
252	<	delay(SHORT_DELAY_MS);
252	>	awaitTermination(t1);
253		assertTrue(lock.hasQueuedThreads());
254		lock.unlock();
255	<	delay(SHORT_DELAY_MS);
255	>	awaitTermination(t2);
256		assertFalse(lock.hasQueuedThreads());
134	–	t1.join();
135	–	t2.join();
257		}
258
259		/**
260		* getQueueLength reports number of waiting threads
261		*/
262	<	public void testGetQueueLength() throws InterruptedException {
263	<	final ReentrantLock lock = new ReentrantLock();
262	>	public void testGetQueueLength()      { testGetQueueLength(false); }
263	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
264	>	public void testGetQueueLength(boolean fair) {
265	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
266		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
267		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
268		assertEquals(0, lock.getQueueLength());
269		lock.lock();
270		t1.start();
271	<	delay(SHORT_DELAY_MS);
271	>	waitForQueuedThread(lock, t1);
272		assertEquals(1, lock.getQueueLength());
273		t2.start();
274	<	delay(SHORT_DELAY_MS);
274	>	waitForQueuedThread(lock, t2);
275		assertEquals(2, lock.getQueueLength());
276		t1.interrupt();
277	<	delay(SHORT_DELAY_MS);
277	>	awaitTermination(t1);
278		assertEquals(1, lock.getQueueLength());
279		lock.unlock();
280	<	delay(SHORT_DELAY_MS);
280	>	awaitTermination(t2);
281		assertEquals(0, lock.getQueueLength());
159	–	t1.join();
160	–	t2.join();
161	–	}
162	–
163	–	/**
164	–	* getQueueLength reports number of waiting threads
165	–	*/
166	–	public void testGetQueueLength_fair() throws InterruptedException {
167	–	final ReentrantLock lock = new ReentrantLock(true);
168	–	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
169	–	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
170	–	assertEquals(0, lock.getQueueLength());
171	–	lock.lock();
172	–	t1.start();
173	–	delay(SHORT_DELAY_MS);
174	–	assertEquals(1, lock.getQueueLength());
175	–	t2.start();
176	–	delay(SHORT_DELAY_MS);
177	–	assertEquals(2, lock.getQueueLength());
178	–	t1.interrupt();
179	–	delay(SHORT_DELAY_MS);
180	–	assertEquals(1, lock.getQueueLength());
181	–	lock.unlock();
182	–	delay(SHORT_DELAY_MS);
183	–	assertEquals(0, lock.getQueueLength());
184	–	t1.join();
185	–	t2.join();
282		}
283
284		/**
285		* hasQueuedThread(null) throws NPE
286		*/
287	<	public void testHasQueuedThreadNPE() {
288	<	final ReentrantLock sync = new ReentrantLock();
287	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
288	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
289	>	public void testHasQueuedThreadNPE(boolean fair) {
290	>	final ReentrantLock lock = new ReentrantLock(fair);
291		try {
292	<	sync.hasQueuedThread(null);
292	>	lock.hasQueuedThread(null);
293		shouldThrow();
294		} catch (NullPointerException success) {}
295		}
296
297		/**
298	<	* hasQueuedThread reports whether a thread is queued.
298	>	* hasQueuedThread reports whether a thread is queued
299		*/
300	<	public void testHasQueuedThread() throws InterruptedException {
301	<	final ReentrantLock sync = new ReentrantLock();
302	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
303	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
304	<	assertFalse(sync.hasQueuedThread(t1));
305	<	assertFalse(sync.hasQueuedThread(t2));
306	<	sync.lock();
300	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
301	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
302	>	public void testHasQueuedThread(boolean fair) {
303	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
304	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
305	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
306	>	assertFalse(lock.hasQueuedThread(t1));
307	>	assertFalse(lock.hasQueuedThread(t2));
308	>	lock.lock();
309		t1.start();
310	<	delay(SHORT_DELAY_MS);
311	<	assertTrue(sync.hasQueuedThread(t1));
310	>	waitForQueuedThread(lock, t1);
311	>	assertTrue(lock.hasQueuedThread(t1));
312	>	assertFalse(lock.hasQueuedThread(t2));
313		t2.start();
314	<	delay(SHORT_DELAY_MS);
315	<	assertTrue(sync.hasQueuedThread(t1));
316	<	assertTrue(sync.hasQueuedThread(t2));
314	>	waitForQueuedThread(lock, t2);
315	>	assertTrue(lock.hasQueuedThread(t1));
316	>	assertTrue(lock.hasQueuedThread(t2));
317		t1.interrupt();
318	<	delay(SHORT_DELAY_MS);
319	<	assertFalse(sync.hasQueuedThread(t1));
320	<	assertTrue(sync.hasQueuedThread(t2));
321	<	sync.unlock();
322	<	delay(SHORT_DELAY_MS);
323	<	assertFalse(sync.hasQueuedThread(t1));
324	<	delay(SHORT_DELAY_MS);
224	<	assertFalse(sync.hasQueuedThread(t2));
225	<	t1.join();
226	<	t2.join();
318	>	awaitTermination(t1);
319	>	assertFalse(lock.hasQueuedThread(t1));
320	>	assertTrue(lock.hasQueuedThread(t2));
321	>	lock.unlock();
322	>	awaitTermination(t2);
323	>	assertFalse(lock.hasQueuedThread(t1));
324	>	assertFalse(lock.hasQueuedThread(t2));
325		}
326
229	–
327		/**
328		* getQueuedThreads includes waiting threads
329		*/
330	<	public void testGetQueuedThreads() throws InterruptedException {
331	<	final PublicReentrantLock lock = new PublicReentrantLock();
330	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
331	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
332	>	public void testGetQueuedThreads(boolean fair) {
333	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
334		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
335		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
336		assertTrue(lock.getQueuedThreads().isEmpty());
337		lock.lock();
338		assertTrue(lock.getQueuedThreads().isEmpty());
339		t1.start();
340	<	delay(SHORT_DELAY_MS);
340	>	waitForQueuedThread(lock, t1);
341	>	assertEquals(1, lock.getQueuedThreads().size());
342		assertTrue(lock.getQueuedThreads().contains(t1));
343		t2.start();
344	<	delay(SHORT_DELAY_MS);
344	>	waitForQueuedThread(lock, t2);
345	>	assertEquals(2, lock.getQueuedThreads().size());
346		assertTrue(lock.getQueuedThreads().contains(t1));
347		assertTrue(lock.getQueuedThreads().contains(t2));
348		t1.interrupt();
349	<	delay(SHORT_DELAY_MS);
349	>	awaitTermination(t1);
350		assertFalse(lock.getQueuedThreads().contains(t1));
351		assertTrue(lock.getQueuedThreads().contains(t2));
352	+	assertEquals(1, lock.getQueuedThreads().size());
353		lock.unlock();
354	<	delay(SHORT_DELAY_MS);
354	>	awaitTermination(t2);
355		assertTrue(lock.getQueuedThreads().isEmpty());
254	–	t1.join();
255	–	t2.join();
356		}
357
258	–
358		/**
359	<	* timed tryLock is interruptible.
359	>	* timed tryLock is interruptible
360		*/
361	<	public void testInterruptedException2() throws InterruptedException {
362	<	final ReentrantLock lock = new ReentrantLock();
361	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
362	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
363	>	public void testTryLock_Interruptible(boolean fair) {
364	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
365		lock.lock();
366	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
366	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
367		public void realRun() throws InterruptedException {
368	<	lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS);
368	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
369		}});
370
371	<	t.start();
271	<	delay(SHORT_DELAY_MS);
371	>	waitForQueuedThread(lock, t);
372		t.interrupt();
373	<	t.join();
373	>	awaitTermination(t);
374	>	releaseLock(lock);
375		}
376
276	–
377		/**
378	<	* TryLock on a locked lock fails
378	>	* tryLock on a locked lock fails
379		*/
380	<	public void testTryLockWhenLocked() throws InterruptedException {
381	<	final ReentrantLock lock = new ReentrantLock();
380	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
381	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
382	>	public void testTryLockWhenLocked(boolean fair) {
383	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
384		lock.lock();
385	<	Thread t = new Thread(new CheckedRunnable() {
385	>	Thread t = newStartedThread(new CheckedRunnable() {
386		public void realRun() {
387		assertFalse(lock.tryLock());
388		}});
389
390	<	t.start();
391	<	t.join();
290	<	lock.unlock();
390	>	awaitTermination(t);
391	>	releaseLock(lock);
392		}
393
394		/**
395		* Timed tryLock on a locked lock times out
396		*/
397	<	public void testTryLock_Timeout() throws InterruptedException {
398	<	final ReentrantLock lock = new ReentrantLock();
397	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
398	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
399	>	public void testTryLock_Timeout(boolean fair) {
400	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
401		lock.lock();
402	<	Thread t = new Thread(new CheckedRunnable() {
402	>	Thread t = newStartedThread(new CheckedRunnable() {
403		public void realRun() throws InterruptedException {
404	<	assertFalse(lock.tryLock(1, MILLISECONDS));
404	>	long startTime = System.nanoTime();
405	>	long timeoutMillis = 10;
406	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
407	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
408		}});
409
410	<	t.start();
411	<	t.join();
306	<	lock.unlock();
410	>	awaitTermination(t);
411	>	releaseLock(lock);
412		}
413
414		/**
415		* getHoldCount returns number of recursive holds
416		*/
417	<	public void testGetHoldCount() {
418	<	ReentrantLock lock = new ReentrantLock();
417	>	public void testGetHoldCount()      { testGetHoldCount(false); }
418	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
419	>	public void testGetHoldCount(boolean fair) {
420	>	ReentrantLock lock = new ReentrantLock(fair);
421		for (int i = 1; i <= SIZE; i++) {
422		lock.lock();
423		assertEquals(i, lock.getHoldCount());
#	Line 321 | Line 428 | public class ReentrantLockTest extends J
428		}
429		}
430
324	–
431		/**
432		* isLocked is true when locked and false when not
433		*/
434	<	public void testIsLocked() throws InterruptedException {
435	<	final ReentrantLock lock = new ReentrantLock();
436	<	lock.lock();
437	<	assertTrue(lock.isLocked());
438	<	lock.unlock();
439	<	assertFalse(lock.isLocked());
440	<	Thread t = new Thread(new CheckedRunnable() {
441	<	public void realRun() throws InterruptedException {
442	<	lock.lock();
443	<	delay(SMALL_DELAY_MS);
444	<	lock.unlock();
445	<	}});
446	<
447	<	t.start();
448	<	delay(SHORT_DELAY_MS);
449	<	assertTrue(lock.isLocked());
450	<	t.join();
451	<	assertFalse(lock.isLocked());
452	<	}
453	<
454	<
455	<	/**
456	<	* lockInterruptibly is interruptible.
457	<	*/
458	<	public void testLockInterruptibly1() throws InterruptedException {
459	<	final ReentrantLock lock = new ReentrantLock();
460	<	lock.lock();
461	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
462	<	t.start();
463	<	delay(SHORT_DELAY_MS);
358	<	t.interrupt();
359	<	delay(SHORT_DELAY_MS);
360	<	lock.unlock();
361	<	t.join();
434	>	public void testIsLocked()      { testIsLocked(false); }
435	>	public void testIsLocked_fair() { testIsLocked(true); }
436	>	public void testIsLocked(boolean fair) {
437	>	try {
438	>	final ReentrantLock lock = new ReentrantLock(fair);
439	>	assertFalse(lock.isLocked());
440	>	lock.lock();
441	>	assertTrue(lock.isLocked());
442	>	lock.lock();
443	>	assertTrue(lock.isLocked());
444	>	lock.unlock();
445	>	assertTrue(lock.isLocked());
446	>	lock.unlock();
447	>	assertFalse(lock.isLocked());
448	>	final CyclicBarrier barrier = new CyclicBarrier(2);
449	>	Thread t = newStartedThread(new CheckedRunnable() {
450	>	public void realRun() throws Exception {
451	>	lock.lock();
452	>	assertTrue(lock.isLocked());
453	>	barrier.await();
454	>	barrier.await();
455	>	lock.unlock();
456	>	}});
457	>
458	>	barrier.await();
459	>	assertTrue(lock.isLocked());
460	>	barrier.await();
461	>	awaitTermination(t);
462	>	assertFalse(lock.isLocked());
463	>	} catch (Exception fail) { threadUnexpectedException(fail); }
464		}
465
466		/**
467		* lockInterruptibly succeeds when unlocked, else is interruptible
468		*/
469	<	public void testLockInterruptibly2() throws InterruptedException {
470	<	final ReentrantLock lock = new ReentrantLock();
471	<	lock.lockInterruptibly();
472	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
473	<	t.start();
474	<	delay(SHORT_DELAY_MS);
469	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
470	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
471	>	public void testLockInterruptibly(boolean fair) {
472	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
473	>	try {
474	>	lock.lockInterruptibly();
475	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
476	>	assertLockedByMoi(lock);
477	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
478	>	waitForQueuedThread(lock, t);
479		t.interrupt();
480		assertTrue(lock.isLocked());
481		assertTrue(lock.isHeldByCurrentThread());
482	<	t.join();
482	>	awaitTermination(t);
483	>	releaseLock(lock);
484		}
485
486		/**
487		* Calling await without holding lock throws IllegalMonitorStateException
488		*/
489	<	public void testAwait_IllegalMonitor() throws InterruptedException {
490	<	final ReentrantLock lock = new ReentrantLock();
491	<	final Condition c = lock.newCondition();
492	<	try {
493	<	c.await();
494	<	shouldThrow();
495	<	} catch (IllegalMonitorStateException success) {}
489	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
490	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
491	>	public void testAwait_IMSE(boolean fair) {
492	>	final ReentrantLock lock = new ReentrantLock(fair);
493	>	final Condition c = lock.newCondition();
494	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
495	>	long startTime = System.nanoTime();
496	>	try {
497	>	await(c, awaitMethod);
498	>	shouldThrow();
499	>	} catch (IllegalMonitorStateException success) {
500	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
501	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
502	>	}
503		}
504
505		/**
506		* Calling signal without holding lock throws IllegalMonitorStateException
507		*/
508	<	public void testSignal_IllegalMonitor() {
509	<	final ReentrantLock lock = new ReentrantLock();
508	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
509	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
510	>	public void testSignal_IMSE(boolean fair) {
511	>	final ReentrantLock lock = new ReentrantLock(fair);
512		final Condition c = lock.newCondition();
513		try {
514		c.signal();
#	Line 403 | Line 519 | public class ReentrantLockTest extends J
519		/**
520		* awaitNanos without a signal times out
521		*/
522	<	public void testAwaitNanos_Timeout() throws InterruptedException {
523	<	final ReentrantLock lock = new ReentrantLock();
524	<	final Condition c = lock.newCondition();
525	<	lock.lock();
526	<	long t = c.awaitNanos(100);
527	<	assertTrue(t <= 0);
528	<	lock.unlock();
522	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
523	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
524	>	public void testAwaitNanos_Timeout(boolean fair) {
525	>	try {
526	>	final ReentrantLock lock = new ReentrantLock(fair);
527	>	final Condition c = lock.newCondition();
528	>	lock.lock();
529	>	long startTime = System.nanoTime();
530	>	long timeoutMillis = 10;
531	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
532	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
533	>	assertTrue(nanosRemaining <= 0);
534	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
535	>	lock.unlock();
536	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
537		}
538
539		/**
540		* timed await without a signal times out
541		*/
542	<	public void testAwait_Timeout() throws InterruptedException {
543	<	final ReentrantLock lock = new ReentrantLock();
544	<	final Condition c = lock.newCondition();
545	<	lock.lock();
546	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
547	<	lock.unlock();
542	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
543	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
544	>	public void testAwait_Timeout(boolean fair) {
545	>	try {
546	>	final ReentrantLock lock = new ReentrantLock(fair);
547	>	final Condition c = lock.newCondition();
548	>	lock.lock();
549	>	long startTime = System.nanoTime();
550	>	long timeoutMillis = 10;
551	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
552	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
553	>	lock.unlock();
554	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
555		}
556
557		/**
558		* awaitUntil without a signal times out
559		*/
560	<	public void testAwaitUntil_Timeout() throws InterruptedException {
561	<	final ReentrantLock lock = new ReentrantLock();
562	<	final Condition c = lock.newCondition();
563	<	lock.lock();
564	<	java.util.Date d = new java.util.Date();
565	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
566	<	lock.unlock();
560	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
561	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
562	>	public void testAwaitUntil_Timeout(boolean fair) {
563	>	try {
564	>	final ReentrantLock lock = new ReentrantLock(fair);
565	>	final Condition c = lock.newCondition();
566	>	lock.lock();
567	>	long startTime = System.nanoTime();
568	>	long timeoutMillis = 10;
569	>	java.util.Date d = new java.util.Date();
570	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
571	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
572	>	lock.unlock();
573	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
574		}
575
576		/**
577		* await returns when signalled
578		*/
579	<	public void testAwait() throws InterruptedException {
580	<	final ReentrantLock lock = new ReentrantLock();
579	>	public void testAwait()      { testAwait(false); }
580	>	public void testAwait_fair() { testAwait(true); }
581	>	public void testAwait(boolean fair) {
582	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
583		final Condition c = lock.newCondition();
584	<	Thread t = new Thread(new CheckedRunnable() {
584	>	final CountDownLatch locked = new CountDownLatch(1);
585	>	Thread t = newStartedThread(new CheckedRunnable() {
586		public void realRun() throws InterruptedException {
587		lock.lock();
588	+	locked.countDown();
589		c.await();
590		lock.unlock();
591		}});
592
593	<	t.start();
452	<	delay(SHORT_DELAY_MS);
593	>	await(locked);
594		lock.lock();
595	+	assertHasWaiters(lock, c, t);
596		c.signal();
597	+	assertHasNoWaiters(lock, c);
598	+	assertTrue(t.isAlive());
599		lock.unlock();
600	<	t.join(SHORT_DELAY_MS);
457	<	assertFalse(t.isAlive());
600	>	awaitTermination(t);
601		}
602
603		/**
604		* hasWaiters throws NPE if null
605		*/
606	<	public void testHasWaitersNPE() {
607	<	final ReentrantLock lock = new ReentrantLock();
606	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
607	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
608	>	public void testHasWaitersNPE(boolean fair) {
609	>	final ReentrantLock lock = new ReentrantLock(fair);
610		try {
611		lock.hasWaiters(null);
612		shouldThrow();
#	Line 471 | Line 616 | public class ReentrantLockTest extends J
616		/**
617		* getWaitQueueLength throws NPE if null
618		*/
619	<	public void testGetWaitQueueLengthNPE() {
620	<	final ReentrantLock lock = new ReentrantLock();
619	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
620	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
621	>	public void testGetWaitQueueLengthNPE(boolean fair) {
622	>	final ReentrantLock lock = new ReentrantLock(fair);
623		try {
624		lock.getWaitQueueLength(null);
625		shouldThrow();
626		} catch (NullPointerException success) {}
627		}
628
482	–
629		/**
630		* getWaitingThreads throws NPE if null
631		*/
632	<	public void testGetWaitingThreadsNPE() {
633	<	final PublicReentrantLock lock = new PublicReentrantLock();
632	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
633	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
634	>	public void testGetWaitingThreadsNPE(boolean fair) {
635	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
636		try {
637		lock.getWaitingThreads(null);
638		shouldThrow();
639		} catch (NullPointerException success) {}
640		}
641
494	–
642		/**
643	<	* hasWaiters throws IAE if not owned
643	>	* hasWaiters throws IllegalArgumentException if not owned
644		*/
645	<	public void testHasWaitersIAE() {
646	<	final ReentrantLock lock = new ReentrantLock();
645	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
646	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
647	>	public void testHasWaitersIAE(boolean fair) {
648	>	final ReentrantLock lock = new ReentrantLock(fair);
649		final Condition c = lock.newCondition();
650	<	final ReentrantLock lock2 = new ReentrantLock();
650	>	final ReentrantLock lock2 = new ReentrantLock(fair);
651		try {
652		lock2.hasWaiters(c);
653		shouldThrow();
#	Line 506 | Line 655 | public class ReentrantLockTest extends J
655		}
656
657		/**
658	<	* hasWaiters throws IMSE if not locked
658	>	* hasWaiters throws IllegalMonitorStateException if not locked
659		*/
660	<	public void testHasWaitersIMSE() {
661	<	final ReentrantLock lock = new ReentrantLock();
660	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
661	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
662	>	public void testHasWaitersIMSE(boolean fair) {
663	>	final ReentrantLock lock = new ReentrantLock(fair);
664		final Condition c = lock.newCondition();
665		try {
666		lock.hasWaiters(c);
#	Line 517 | Line 668 | public class ReentrantLockTest extends J
668		} catch (IllegalMonitorStateException success) {}
669		}
670
520	–
671		/**
672	<	* getWaitQueueLength throws IAE if not owned
672	>	* getWaitQueueLength throws IllegalArgumentException if not owned
673		*/
674	<	public void testGetWaitQueueLengthIAE() {
675	<	final ReentrantLock lock = new ReentrantLock();
674	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
675	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
676	>	public void testGetWaitQueueLengthIAE(boolean fair) {
677	>	final ReentrantLock lock = new ReentrantLock(fair);
678		final Condition c = lock.newCondition();
679	<	final ReentrantLock lock2 = new ReentrantLock();
679	>	final ReentrantLock lock2 = new ReentrantLock(fair);
680		try {
681		lock2.getWaitQueueLength(c);
682		shouldThrow();
#	Line 532 | Line 684 | public class ReentrantLockTest extends J
684		}
685
686		/**
687	<	* getWaitQueueLength throws IMSE if not locked
687	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
688		*/
689	<	public void testGetWaitQueueLengthIMSE() {
690	<	final ReentrantLock lock = new ReentrantLock();
689	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
690	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
691	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
692	>	final ReentrantLock lock = new ReentrantLock(fair);
693		final Condition c = lock.newCondition();
694		try {
695		lock.getWaitQueueLength(c);
#	Line 543 | Line 697 | public class ReentrantLockTest extends J
697		} catch (IllegalMonitorStateException success) {}
698		}
699
546	–
700		/**
701	<	* getWaitingThreads throws IAE if not owned
701	>	* getWaitingThreads throws IllegalArgumentException if not owned
702		*/
703	<	public void testGetWaitingThreadsIAE() {
704	<	final PublicReentrantLock lock = new PublicReentrantLock();
703	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
704	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
705	>	public void testGetWaitingThreadsIAE(boolean fair) {
706	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
707		final Condition c = lock.newCondition();
708	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
708	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
709		try {
710		lock2.getWaitingThreads(c);
711		shouldThrow();
#	Line 558 | Line 713 | public class ReentrantLockTest extends J
713		}
714
715		/**
716	<	* getWaitingThreads throws IMSE if not locked
716	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
717		*/
718	<	public void testGetWaitingThreadsIMSE() {
719	<	final PublicReentrantLock lock = new PublicReentrantLock();
718	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
719	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
720	>	public void testGetWaitingThreadsIMSE(boolean fair) {
721	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
722		final Condition c = lock.newCondition();
723		try {
724		lock.getWaitingThreads(c);
#	Line 569 | Line 726 | public class ReentrantLockTest extends J
726		} catch (IllegalMonitorStateException success) {}
727		}
728
572	–
729		/**
730		* hasWaiters returns true when a thread is waiting, else false
731		*/
732	<	public void testHasWaiters() throws InterruptedException {
733	<	final ReentrantLock lock = new ReentrantLock();
732	>	public void testHasWaiters()      { testHasWaiters(false); }
733	>	public void testHasWaiters_fair() { testHasWaiters(true); }
734	>	public void testHasWaiters(boolean fair) {
735	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
736		final Condition c = lock.newCondition();
737	<	Thread t = new Thread(new CheckedRunnable() {
737	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
738	>	Thread t = newStartedThread(new CheckedRunnable() {
739		public void realRun() throws InterruptedException {
740		lock.lock();
741	+	assertHasNoWaiters(lock, c);
742		assertFalse(lock.hasWaiters(c));
743	<	assertEquals(0, lock.getWaitQueueLength(c));
743	>	pleaseSignal.countDown();
744		c.await();
745	+	assertHasNoWaiters(lock, c);
746	+	assertFalse(lock.hasWaiters(c));
747		lock.unlock();
748		}});
749
750	<	t.start();
589	<	delay(SHORT_DELAY_MS);
750	>	await(pleaseSignal);
751		lock.lock();
752	+	assertHasWaiters(lock, c, t);
753		assertTrue(lock.hasWaiters(c));
592	–	assertEquals(1, lock.getWaitQueueLength(c));
754		c.signal();
755	<	lock.unlock();
595	<	delay(SHORT_DELAY_MS);
596	<	lock.lock();
755	>	assertHasNoWaiters(lock, c);
756		assertFalse(lock.hasWaiters(c));
598	–	assertEquals(0, lock.getWaitQueueLength(c));
757		lock.unlock();
758	<	t.join(SHORT_DELAY_MS);
759	<	assertFalse(t.isAlive());
758	>	awaitTermination(t);
759	>	assertHasNoWaiters(lock, c);
760		}
761
762		/**
763		* getWaitQueueLength returns number of waiting threads
764		*/
765	<	public void testGetWaitQueueLength() throws InterruptedException {
766	<	final ReentrantLock lock = new ReentrantLock();
765	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
766	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
767	>	public void testGetWaitQueueLength(boolean fair) {
768	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
769		final Condition c = lock.newCondition();
770	+	final CountDownLatch locked1 = new CountDownLatch(1);
771	+	final CountDownLatch locked2 = new CountDownLatch(1);
772		Thread t1 = new Thread(new CheckedRunnable() {
773		public void realRun() throws InterruptedException {
774		lock.lock();
775		assertFalse(lock.hasWaiters(c));
776		assertEquals(0, lock.getWaitQueueLength(c));
777	+	locked1.countDown();
778		c.await();
779		lock.unlock();
780		}});
#	Line 621 | Line 784 | public class ReentrantLockTest extends J
784		lock.lock();
785		assertTrue(lock.hasWaiters(c));
786		assertEquals(1, lock.getWaitQueueLength(c));
787	+	locked2.countDown();
788		c.await();
789		lock.unlock();
790		}});
791
792	+	lock.lock();
793	+	assertEquals(0, lock.getWaitQueueLength(c));
794	+	lock.unlock();
795	+
796		t1.start();
797	<	delay(SHORT_DELAY_MS);
797	>	await(locked1);
798	>
799	>	lock.lock();
800	>	assertHasWaiters(lock, c, t1);
801	>	assertEquals(1, lock.getWaitQueueLength(c));
802	>	lock.unlock();
803	>
804		t2.start();
805	<	delay(SHORT_DELAY_MS);
805	>	await(locked2);
806	>
807		lock.lock();
808	<	assertTrue(lock.hasWaiters(c));
808	>	assertHasWaiters(lock, c, t1, t2);
809		assertEquals(2, lock.getWaitQueueLength(c));
810		c.signalAll();
811	+	assertHasNoWaiters(lock, c);
812		lock.unlock();
813	<	delay(SHORT_DELAY_MS);
814	<	lock.lock();
815	<	assertFalse(lock.hasWaiters(c));
816	<	assertEquals(0, lock.getWaitQueueLength(c));
817	<	lock.unlock();
642	<	t1.join(SHORT_DELAY_MS);
643	<	t2.join(SHORT_DELAY_MS);
644	<	assertFalse(t1.isAlive());
645	<	assertFalse(t2.isAlive());
813	>
814	>	awaitTermination(t1);
815	>	awaitTermination(t2);
816	>
817	>	assertHasNoWaiters(lock, c);
818		}
819
820		/**
821		* getWaitingThreads returns only and all waiting threads
822		*/
823	<	public void testGetWaitingThreads() throws InterruptedException {
824	<	final PublicReentrantLock lock = new PublicReentrantLock();
823	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
824	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
825	>	public void testGetWaitingThreads(boolean fair) {
826	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
827		final Condition c = lock.newCondition();
828	+	final CountDownLatch locked1 = new CountDownLatch(1);
829	+	final CountDownLatch locked2 = new CountDownLatch(1);
830		Thread t1 = new Thread(new CheckedRunnable() {
831		public void realRun() throws InterruptedException {
832		lock.lock();
833		assertTrue(lock.getWaitingThreads(c).isEmpty());
834	+	locked1.countDown();
835		c.await();
836		lock.unlock();
837		}});
#	Line 663 | Line 840 | public class ReentrantLockTest extends J
840		public void realRun() throws InterruptedException {
841		lock.lock();
842		assertFalse(lock.getWaitingThreads(c).isEmpty());
843	+	locked2.countDown();
844		c.await();
845		lock.unlock();
846		}});
#	Line 670 | Line 848 | public class ReentrantLockTest extends J
848		lock.lock();
849		assertTrue(lock.getWaitingThreads(c).isEmpty());
850		lock.unlock();
851	+
852		t1.start();
853	<	delay(SHORT_DELAY_MS);
853	>	await(locked1);
854	>
855	>	lock.lock();
856	>	assertHasWaiters(lock, c, t1);
857	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
858	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
859	>	assertEquals(1, lock.getWaitingThreads(c).size());
860	>	lock.unlock();
861	>
862		t2.start();
863	<	delay(SHORT_DELAY_MS);
863	>	await(locked2);
864	>
865		lock.lock();
866	<	assertTrue(lock.hasWaiters(c));
866	>	assertHasWaiters(lock, c, t1, t2);
867		assertTrue(lock.getWaitingThreads(c).contains(t1));
868		assertTrue(lock.getWaitingThreads(c).contains(t2));
869	+	assertEquals(2, lock.getWaitingThreads(c).size());
870		c.signalAll();
871	+	assertHasNoWaiters(lock, c);
872		lock.unlock();
683	–	delay(SHORT_DELAY_MS);
684	–	lock.lock();
685	–	assertFalse(lock.hasWaiters(c));
686	–	assertTrue(lock.getWaitingThreads(c).isEmpty());
687	–	lock.unlock();
688	–	t1.join(SHORT_DELAY_MS);
689	–	t2.join(SHORT_DELAY_MS);
690	–	assertFalse(t1.isAlive());
691	–	assertFalse(t2.isAlive());
692	–	}
693	–
694	–	/** A helper class for uninterruptible wait tests */
695	–	class UninterruptibleThread extends Thread {
696	–	private ReentrantLock lock;
697	–	private Condition c;
698	–
699	–	public volatile boolean canAwake = false;
700	–	public volatile boolean interrupted = false;
701	–	public volatile boolean lockStarted = false;
702	–
703	–	public UninterruptibleThread(ReentrantLock lock, Condition c) {
704	–	this.lock = lock;
705	–	this.c = c;
706	–	}
873
874	<	public synchronized void run() {
875	<	lock.lock();
710	<	lockStarted = true;
874	>	awaitTermination(t1);
875	>	awaitTermination(t2);
876
877	<	while (!canAwake) {
713	<	c.awaitUninterruptibly();
714	<	}
715	<
716	<	interrupted = isInterrupted();
717	<	lock.unlock();
718	<	}
877	>	assertHasNoWaiters(lock, c);
878		}
879
880		/**
881	<	* awaitUninterruptibly doesn't abort on interrupt
881	>	* awaitUninterruptibly is uninterruptible
882		*/
883	<	public void testAwaitUninterruptibly() throws InterruptedException {
884	<	final ReentrantLock lock = new ReentrantLock();
883	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
884	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
885	>	public void testAwaitUninterruptibly(boolean fair) {
886	>	final ReentrantLock lock = new ReentrantLock(fair);
887		final Condition c = lock.newCondition();
888	<	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
888	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
889
890	<	thread.start();
890	>	Thread t1 = newStartedThread(new CheckedRunnable() {
891	>	public void realRun() {
892	>	// Interrupt before awaitUninterruptibly
893	>	lock.lock();
894	>	pleaseInterrupt.countDown();
895	>	Thread.currentThread().interrupt();
896	>	c.awaitUninterruptibly();
897	>	assertTrue(Thread.interrupted());
898	>	lock.unlock();
899	>	}});
900
901	<	while (!thread.lockStarted) {
902	<	delay(100);
903	<	}
901	>	Thread t2 = newStartedThread(new CheckedRunnable() {
902	>	public void realRun() {
903	>	// Interrupt during awaitUninterruptibly
904	>	lock.lock();
905	>	pleaseInterrupt.countDown();
906	>	c.awaitUninterruptibly();
907	>	assertTrue(Thread.interrupted());
908	>	lock.unlock();
909	>	}});
910
911	+	await(pleaseInterrupt);
912		lock.lock();
913	<	try {
914	<	thread.interrupt();
738	<	thread.canAwake = true;
739	<	c.signal();
740	<	} finally {
741	<	lock.unlock();
742	<	}
913	>	lock.unlock();
914	>	t2.interrupt();
915
916	<	thread.join();
917	<	assertTrue(thread.interrupted);
746	<	assertFalse(thread.isAlive());
747	<	}
916	>	assertThreadStaysAlive(t1);
917	>	assertTrue(t2.isAlive());
918
919	<	/**
920	<	* await is interruptible
921	<	*/
752	<	public void testAwait_Interrupt() throws InterruptedException {
753	<	final ReentrantLock lock = new ReentrantLock();
754	<	final Condition c = lock.newCondition();
755	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
756	<	public void realRun() throws InterruptedException {
757	<	lock.lock();
758	<	c.await();
759	<	}});
919	>	lock.lock();
920	>	c.signalAll();
921	>	lock.unlock();
922
923	<	t.start();
924	<	delay(SHORT_DELAY_MS);
763	<	t.interrupt();
764	<	t.join(SHORT_DELAY_MS);
765	<	assertFalse(t.isAlive());
923	>	awaitTermination(t1);
924	>	awaitTermination(t2);
925		}
926
927		/**
928	<	* awaitNanos is interruptible
928	>	* await/awaitNanos/awaitUntil is interruptible
929		*/
930	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
931	<	final ReentrantLock lock = new ReentrantLock();
930	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
931	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
932	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
933	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
934	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
935	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
936	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
937	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
938	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
939	>	final PublicReentrantLock lock =
940	>	new PublicReentrantLock(fair);
941		final Condition c = lock.newCondition();
942	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
942	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
943	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
944		public void realRun() throws InterruptedException {
945		lock.lock();
946	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
946	>	assertLockedByMoi(lock);
947	>	assertHasNoWaiters(lock, c);
948	>	pleaseInterrupt.countDown();
949	>	try {
950	>	await(c, awaitMethod);
951	>	} finally {
952	>	assertLockedByMoi(lock);
953	>	assertHasNoWaiters(lock, c);
954	>	lock.unlock();
955	>	assertFalse(Thread.interrupted());
956	>	}
957		}});
958
959	<	t.start();
960	<	delay(SHORT_DELAY_MS);
959	>	await(pleaseInterrupt);
960	>	assertHasWaiters(lock, c, t);
961		t.interrupt();
962	<	t.join(SHORT_DELAY_MS);
963	<	assertFalse(t.isAlive());
962	>	awaitTermination(t);
963	>	assertNotLocked(lock);
964		}
965
966		/**
967	<	* awaitUntil is interruptible
967	>	* signalAll wakes up all threads
968		*/
969	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
970	<	final ReentrantLock lock = new ReentrantLock();
969	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
970	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
971	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
972	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
973	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
974	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
975	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
976	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
977	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
978	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
979		final Condition c = lock.newCondition();
980	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
980	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
981	>	class Awaiter extends CheckedRunnable {
982		public void realRun() throws InterruptedException {
983		lock.lock();
984	<	java.util.Date d = new java.util.Date();
985	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
986	<	}});
984	>	pleaseSignal.countDown();
985	>	await(c, awaitMethod);
986	>	lock.unlock();
987	>	}
988	>	}
989
990	<	t.start();
991	<	delay(SHORT_DELAY_MS);
992	<	t.interrupt();
993	<	t.join(SHORT_DELAY_MS);
994	<	assertFalse(t.isAlive());
990	>	Thread t1 = newStartedThread(new Awaiter());
991	>	Thread t2 = newStartedThread(new Awaiter());
992	>
993	>	await(pleaseSignal);
994	>	lock.lock();
995	>	assertHasWaiters(lock, c, t1, t2);
996	>	c.signalAll();
997	>	assertHasNoWaiters(lock, c);
998	>	lock.unlock();
999	>	awaitTermination(t1);
1000	>	awaitTermination(t2);
1001		}
1002
1003		/**
1004	<	* signalAll wakes up all threads
1004	>	* signal wakes up waiting threads in FIFO order
1005		*/
1006	<	public void testSignalAll() throws InterruptedException {
1007	<	final ReentrantLock lock = new ReentrantLock();
1006	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1007	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1008	>	public void testSignalWakesFifo(boolean fair) {
1009	>	final PublicReentrantLock lock =
1010	>	new PublicReentrantLock(fair);
1011		final Condition c = lock.newCondition();
1012	<	Thread t1 = new Thread(new CheckedRunnable() {
1012	>	final CountDownLatch locked1 = new CountDownLatch(1);
1013	>	final CountDownLatch locked2 = new CountDownLatch(1);
1014	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1015		public void realRun() throws InterruptedException {
1016		lock.lock();
1017	+	locked1.countDown();
1018		c.await();
1019		lock.unlock();
1020		}});
1021
1022	<	Thread t2 = new Thread(new CheckedRunnable() {
1022	>	await(locked1);
1023	>
1024	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1025		public void realRun() throws InterruptedException {
1026		lock.lock();
1027	+	locked2.countDown();
1028		c.await();
1029		lock.unlock();
1030		}});
1031
1032	<	t1.start();
1033	<	t2.start();
829	<	delay(SHORT_DELAY_MS);
1032	>	await(locked2);
1033	>
1034		lock.lock();
1035	<	c.signalAll();
1035	>	assertHasWaiters(lock, c, t1, t2);
1036	>	assertFalse(lock.hasQueuedThreads());
1037	>	c.signal();
1038	>	assertHasWaiters(lock, c, t2);
1039	>	assertTrue(lock.hasQueuedThread(t1));
1040	>	assertFalse(lock.hasQueuedThread(t2));
1041	>	c.signal();
1042	>	assertHasNoWaiters(lock, c);
1043	>	assertTrue(lock.hasQueuedThread(t1));
1044	>	assertTrue(lock.hasQueuedThread(t2));
1045		lock.unlock();
1046	<	t1.join(SHORT_DELAY_MS);
1047	<	t2.join(SHORT_DELAY_MS);
835	<	assertFalse(t1.isAlive());
836	<	assertFalse(t2.isAlive());
1046	>	awaitTermination(t1);
1047	>	awaitTermination(t2);
1048		}
1049
1050		/**
1051		* await after multiple reentrant locking preserves lock count
1052		*/
1053	<	public void testAwaitLockCount() throws InterruptedException {
1054	<	final ReentrantLock lock = new ReentrantLock();
1053	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1054	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1055	>	public void testAwaitLockCount(boolean fair) {
1056	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1057		final Condition c = lock.newCondition();
1058	<	Thread t1 = new Thread(new CheckedRunnable() {
1058	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1059	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1060		public void realRun() throws InterruptedException {
1061		lock.lock();
1062	+	assertLockedByMoi(lock);
1063		assertEquals(1, lock.getHoldCount());
1064	+	pleaseSignal.countDown();
1065		c.await();
1066	+	assertLockedByMoi(lock);
1067		assertEquals(1, lock.getHoldCount());
1068		lock.unlock();
1069		}});
1070
1071	<	Thread t2 = new Thread(new CheckedRunnable() {
1071	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1072		public void realRun() throws InterruptedException {
1073		lock.lock();
1074		lock.lock();
1075	+	assertLockedByMoi(lock);
1076		assertEquals(2, lock.getHoldCount());
1077	+	pleaseSignal.countDown();
1078		c.await();
1079	+	assertLockedByMoi(lock);
1080		assertEquals(2, lock.getHoldCount());
1081		lock.unlock();
1082		lock.unlock();
1083		}});
1084
1085	<	t1.start();
866	<	t2.start();
867	<	delay(SHORT_DELAY_MS);
1085	>	await(pleaseSignal);
1086		lock.lock();
1087	+	assertHasWaiters(lock, c, t1, t2);
1088	+	assertEquals(1, lock.getHoldCount());
1089		c.signalAll();
1090	+	assertHasNoWaiters(lock, c);
1091		lock.unlock();
1092	<	t1.join(SHORT_DELAY_MS);
1093	<	t2.join(SHORT_DELAY_MS);
873	<	assertFalse(t1.isAlive());
874	<	assertFalse(t2.isAlive());
1092	>	awaitTermination(t1);
1093	>	awaitTermination(t2);
1094		}
1095
1096		/**
1097		* A serialized lock deserializes as unlocked
1098		*/
1099	<	public void testSerialization() throws Exception {
1100	<	ReentrantLock l = new ReentrantLock();
1101	<	l.lock();
1102	<	l.unlock();
1103	<
1104	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1105	<	ObjectOutputStream out =
1106	<	new ObjectOutputStream(new BufferedOutputStream(bout));
1107	<	out.writeObject(l);
1108	<	out.close();
1109	<
1110	<	ByteArrayInputStream bin =
1111	<	new ByteArrayInputStream(bout.toByteArray());
1112	<	ObjectInputStream in =
1113	<	new ObjectInputStream(new BufferedInputStream(bin));
1114	<	ReentrantLock r = (ReentrantLock) in.readObject();
1115	<	r.lock();
1116	<	r.unlock();
1099	>	public void testSerialization()      { testSerialization(false); }
1100	>	public void testSerialization_fair() { testSerialization(true); }
1101	>	public void testSerialization(boolean fair) {
1102	>	ReentrantLock lock = new ReentrantLock(fair);
1103	>	lock.lock();
1104	>
1105	>	ReentrantLock clone = serialClone(lock);
1106	>	assertEquals(lock.isFair(), clone.isFair());
1107	>	assertTrue(lock.isLocked());
1108	>	assertFalse(clone.isLocked());
1109	>	assertEquals(1, lock.getHoldCount());
1110	>	assertEquals(0, clone.getHoldCount());
1111	>	clone.lock();
1112	>	clone.lock();
1113	>	assertTrue(clone.isLocked());
1114	>	assertEquals(2, clone.getHoldCount());
1115	>	assertEquals(1, lock.getHoldCount());
1116	>	clone.unlock();
1117	>	clone.unlock();
1118	>	assertTrue(lock.isLocked());
1119	>	assertFalse(clone.isLocked());
1120		}
1121
1122		/**
1123		* toString indicates current lock state
1124		*/
1125	<	public void testToString() {
1126	<	ReentrantLock lock = new ReentrantLock();
1127	<	String us = lock.toString();
1128	<	assertTrue(us.indexOf("Unlocked") >= 0);
1125	>	public void testToString()      { testToString(false); }
1126	>	public void testToString_fair() { testToString(true); }
1127	>	public void testToString(boolean fair) {
1128	>	ReentrantLock lock = new ReentrantLock(fair);
1129	>	assertTrue(lock.toString().contains("Unlocked"));
1130		lock.lock();
1131	<	String ls = lock.toString();
1132	<	assertTrue(ls.indexOf("Locked") >= 0);
1131	>	assertTrue(lock.toString().contains("Locked"));
1132	>	lock.unlock();
1133	>	assertTrue(lock.toString().contains("Unlocked"));
1134		}
911	–
1135		}

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