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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.31 by jsr166, Sat Nov 21 02:33:20 2009 UTC vs.
Revision 1.70 by jsr166, Sun Sep 22 01:59:57 2019 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.concurrent.locks.*;
11	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	–	import java.util.*;
14	–	import java.io.*;
10
11	+	import java.util.ArrayList;
12	+	import java.util.Arrays;
13	+	import java.util.Collection;
14	+	import java.util.HashSet;
15	+	import java.util.concurrent.Callable;
16	+	import java.util.concurrent.CountDownLatch;
17	+	import java.util.concurrent.CyclicBarrier;
18	+	import java.util.concurrent.ThreadLocalRandom;
19	+	import java.util.concurrent.atomic.AtomicBoolean;
20	+	import java.util.concurrent.locks.Condition;
21	+	import java.util.concurrent.locks.Lock;
22	+	import java.util.concurrent.locks.ReentrantLock;
23	+
24	+	import junit.framework.Test;
25	+	import junit.framework.TestSuite;
26	+
27	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
28		public class ReentrantLockTest extends JSR166TestCase {
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	main(suite(), args);
31		}
32		public static Test suite() {
33		return new TestSuite(ReentrantLockTest.class);
34		}
35
36		/**
37	<	* A runnable calling lockInterruptibly
37	>	* A checked runnable calling lockInterruptibly
38		*/
39		class InterruptibleLockRunnable extends CheckedRunnable {
40		final ReentrantLock lock;
41	<	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
41	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
42		public void realRun() throws InterruptedException {
43		lock.lockInterruptibly();
44		}
45		}
46
35	–
47		/**
48	<	* A runnable calling lockInterruptibly that expects to be
48	>	* A checked runnable calling lockInterruptibly that expects to be
49		* interrupted
50		*/
51		class InterruptedLockRunnable extends CheckedInterruptedRunnable {
52		final ReentrantLock lock;
53	<	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
53	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
54		public void realRun() throws InterruptedException {
55		lock.lockInterruptibly();
56		}
#	Line 50 | Line 61 | public class ReentrantLockTest extends J
61		*/
62		static class PublicReentrantLock extends ReentrantLock {
63		PublicReentrantLock() { super(); }
64	+	PublicReentrantLock(boolean fair) { super(fair); }
65	+	public Thread getOwner() {
66	+	return super.getOwner();
67	+	}
68		public Collection<Thread> getQueuedThreads() {
69		return super.getQueuedThreads();
70		}
71		public Collection<Thread> getWaitingThreads(Condition c) {
72		return super.getWaitingThreads(c);
73		}
74	+	}
75
76	+	/**
77	+	* Releases write lock, checking that it had a hold count of 1.
78	+	*/
79	+	void releaseLock(PublicReentrantLock lock) {
80	+	assertLockedByMoi(lock);
81	+	lock.unlock();
82	+	assertFalse(lock.isHeldByCurrentThread());
83	+	assertNotLocked(lock);
84	+	}
85
86	+	/**
87	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
88	+	*/
89	+	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
90	+	long startTime = System.nanoTime();
91	+	while (!lock.hasQueuedThread(t)) {
92	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
93	+	throw new AssertionError("timed out");
94	+	Thread.yield();
95	+	}
96	+	assertTrue(t.isAlive());
97	+	assertNotSame(t, lock.getOwner());
98		}
99
100		/**
101	<	* Constructor sets given fairness
101	>	* Checks that lock is not locked.
102		*/
103	<	public void testConstructor() {
104	<	assertFalse(new ReentrantLock().isFair());
105	<	assertFalse(new ReentrantLock(false).isFair());
106	<	assertTrue(new ReentrantLock(true).isFair());
103	>	void assertNotLocked(PublicReentrantLock lock) {
104	>	assertFalse(lock.isLocked());
105	>	assertFalse(lock.isHeldByCurrentThread());
106	>	assertNull(lock.getOwner());
107	>	assertEquals(0, lock.getHoldCount());
108		}
109
110		/**
111	<	* locking an unlocked lock succeeds
111	>	* Checks that lock is locked by the given thread.
112	>	*/
113	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
114	>	assertTrue(lock.isLocked());
115	>	assertSame(t, lock.getOwner());
116	>	assertEquals(t == Thread.currentThread(),
117	>	lock.isHeldByCurrentThread());
118	>	assertEquals(t == Thread.currentThread(),
119	>	lock.getHoldCount() > 0);
120	>	}
121	>
122	>	/**
123	>	* Checks that lock is locked by the current thread.
124		*/
125	<	public void testLock() {
126	<	ReentrantLock rl = new ReentrantLock();
77	<	rl.lock();
78	<	assertTrue(rl.isLocked());
79	<	rl.unlock();
80	<	assertFalse(rl.isLocked());
125	>	void assertLockedByMoi(PublicReentrantLock lock) {
126	>	assertLockedBy(lock, Thread.currentThread());
127		}
128
129		/**
130	<	* locking an unlocked fair lock succeeds
131	<	*/
132	<	public void testFairLock() {
133	<	ReentrantLock rl = new ReentrantLock(true);
134	<	rl.lock();
135	<	assertTrue(rl.isLocked());
136	<	rl.unlock();
130	>	* Checks that condition c has no waiters.
131	>	*/
132	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
133	>	assertHasWaiters(lock, c, new Thread[] {});
134	>	}
135	>
136	>	/**
137	>	* Checks that condition c has exactly the given waiter threads.
138	>	*/
139	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
140	>	Thread... threads) {
141	>	lock.lock();
142	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
143	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
144	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
145	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
146	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
147	>	new HashSet<Thread>(Arrays.asList(threads)));
148	>	lock.unlock();
149	>	}
150	>
151	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
152	>
153	>	static AwaitMethod randomAwaitMethod() {
154	>	AwaitMethod[] awaitMethods = AwaitMethod.values();
155	>	return awaitMethods[ThreadLocalRandom.current().nextInt(awaitMethods.length)];
156	>	}
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	>	* Constructor sets given fairness, and is in unlocked state
187	>	*/
188	>	public void testConstructor() {
189	>	PublicReentrantLock lock;
190	>
191	>	lock = new PublicReentrantLock();
192	>	assertFalse(lock.isFair());
193	>	assertNotLocked(lock);
194	>
195	>	lock = new PublicReentrantLock(true);
196	>	assertTrue(lock.isFair());
197	>	assertNotLocked(lock);
198	>
199	>	lock = new PublicReentrantLock(false);
200	>	assertFalse(lock.isFair());
201	>	assertNotLocked(lock);
202	>	}
203	>
204	>	/**
205	>	* locking an unlocked lock succeeds
206	>	*/
207	>	public void testLock()      { testLock(false); }
208	>	public void testLock_fair() { testLock(true); }
209	>	public void testLock(boolean fair) {
210	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
211	>	lock.lock();
212	>	assertLockedByMoi(lock);
213	>	releaseLock(lock);
214		}
215
216		/**
217		* Unlocking an unlocked lock throws IllegalMonitorStateException
218		*/
219	<	public void testUnlock_IllegalMonitorStateException() {
220	<	ReentrantLock rl = new ReentrantLock();
219	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
220	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
221	>	public void testUnlock_IMSE(boolean fair) {
222	>	final ReentrantLock lock = new ReentrantLock(fair);
223		try {
224	<	rl.unlock();
224	>	lock.unlock();
225		shouldThrow();
226		} catch (IllegalMonitorStateException success) {}
227		}
#	Line 104 | Line 229 | public class ReentrantLockTest extends J
229		/**
230		* tryLock on an unlocked lock succeeds
231		*/
232	<	public void testTryLock() {
233	<	ReentrantLock rl = new ReentrantLock();
234	<	assertTrue(rl.tryLock());
235	<	assertTrue(rl.isLocked());
236	<	rl.unlock();
232	>	public void testTryLock()      { testTryLock(false); }
233	>	public void testTryLock_fair() { testTryLock(true); }
234	>	public void testTryLock(boolean fair) {
235	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
236	>	assertTrue(lock.tryLock());
237	>	assertLockedByMoi(lock);
238	>	assertTrue(lock.tryLock());
239	>	assertLockedByMoi(lock);
240	>	lock.unlock();
241	>	releaseLock(lock);
242		}
243
114	–
244		/**
245		* hasQueuedThreads reports whether there are waiting threads
246		*/
247	<	public void testhasQueuedThreads() throws InterruptedException {
248	<	final ReentrantLock lock = new ReentrantLock();
247	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
248	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
249	>	public void testHasQueuedThreads(boolean fair) {
250	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
251		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
252		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
253		assertFalse(lock.hasQueuedThreads());
254		lock.lock();
255	+	assertFalse(lock.hasQueuedThreads());
256		t1.start();
257	<	Thread.sleep(SHORT_DELAY_MS);
257	>	waitForQueuedThread(lock, t1);
258		assertTrue(lock.hasQueuedThreads());
259		t2.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
260	>	waitForQueuedThread(lock, t2);
261		assertTrue(lock.hasQueuedThreads());
262		t1.interrupt();
263	<	Thread.sleep(SHORT_DELAY_MS);
263	>	awaitTermination(t1);
264		assertTrue(lock.hasQueuedThreads());
265		lock.unlock();
266	<	Thread.sleep(SHORT_DELAY_MS);
266	>	awaitTermination(t2);
267		assertFalse(lock.hasQueuedThreads());
136	–	t1.join();
137	–	t2.join();
268		}
269
270		/**
271		* getQueueLength reports number of waiting threads
272		*/
273	<	public void testGetQueueLength() throws InterruptedException {
274	<	final ReentrantLock lock = new ReentrantLock();
273	>	public void testGetQueueLength()      { testGetQueueLength(false); }
274	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
275	>	public void testGetQueueLength(boolean fair) {
276	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
277		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
278		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
279		assertEquals(0, lock.getQueueLength());
280		lock.lock();
281		t1.start();
282	<	Thread.sleep(SHORT_DELAY_MS);
282	>	waitForQueuedThread(lock, t1);
283		assertEquals(1, lock.getQueueLength());
284		t2.start();
285	<	Thread.sleep(SHORT_DELAY_MS);
285	>	waitForQueuedThread(lock, t2);
286		assertEquals(2, lock.getQueueLength());
287		t1.interrupt();
288	<	Thread.sleep(SHORT_DELAY_MS);
288	>	awaitTermination(t1);
289		assertEquals(1, lock.getQueueLength());
290		lock.unlock();
291	<	Thread.sleep(SHORT_DELAY_MS);
291	>	awaitTermination(t2);
292		assertEquals(0, lock.getQueueLength());
161	–	t1.join();
162	–	t2.join();
163	–	}
164	–
165	–	/**
166	–	* getQueueLength reports number of waiting threads
167	–	*/
168	–	public void testGetQueueLength_fair() throws InterruptedException {
169	–	final ReentrantLock lock = new ReentrantLock(true);
170	–	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
171	–	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
172	–	assertEquals(0, lock.getQueueLength());
173	–	lock.lock();
174	–	t1.start();
175	–	Thread.sleep(SHORT_DELAY_MS);
176	–	assertEquals(1, lock.getQueueLength());
177	–	t2.start();
178	–	Thread.sleep(SHORT_DELAY_MS);
179	–	assertEquals(2, lock.getQueueLength());
180	–	t1.interrupt();
181	–	Thread.sleep(SHORT_DELAY_MS);
182	–	assertEquals(1, lock.getQueueLength());
183	–	lock.unlock();
184	–	Thread.sleep(SHORT_DELAY_MS);
185	–	assertEquals(0, lock.getQueueLength());
186	–	t1.join();
187	–	t2.join();
293		}
294
295		/**
296		* hasQueuedThread(null) throws NPE
297		*/
298	<	public void testHasQueuedThreadNPE() {
299	<	final ReentrantLock sync = new ReentrantLock();
298	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
299	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
300	>	public void testHasQueuedThreadNPE(boolean fair) {
301	>	final ReentrantLock lock = new ReentrantLock(fair);
302		try {
303	<	sync.hasQueuedThread(null);
303	>	lock.hasQueuedThread(null);
304		shouldThrow();
305		} catch (NullPointerException success) {}
306		}
307
308		/**
309	<	* hasQueuedThread reports whether a thread is queued.
309	>	* hasQueuedThread reports whether a thread is queued
310		*/
311	<	public void testHasQueuedThread() throws InterruptedException {
312	<	final ReentrantLock sync = new ReentrantLock();
313	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
314	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
315	<	assertFalse(sync.hasQueuedThread(t1));
316	<	assertFalse(sync.hasQueuedThread(t2));
317	<	sync.lock();
311	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
312	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
313	>	public void testHasQueuedThread(boolean fair) {
314	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
315	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
316	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
317	>	assertFalse(lock.hasQueuedThread(t1));
318	>	assertFalse(lock.hasQueuedThread(t2));
319	>	lock.lock();
320		t1.start();
321	<	Thread.sleep(SHORT_DELAY_MS);
322	<	assertTrue(sync.hasQueuedThread(t1));
321	>	waitForQueuedThread(lock, t1);
322	>	assertTrue(lock.hasQueuedThread(t1));
323	>	assertFalse(lock.hasQueuedThread(t2));
324		t2.start();
325	<	Thread.sleep(SHORT_DELAY_MS);
326	<	assertTrue(sync.hasQueuedThread(t1));
327	<	assertTrue(sync.hasQueuedThread(t2));
325	>	waitForQueuedThread(lock, t2);
326	>	assertTrue(lock.hasQueuedThread(t1));
327	>	assertTrue(lock.hasQueuedThread(t2));
328		t1.interrupt();
329	<	Thread.sleep(SHORT_DELAY_MS);
330	<	assertFalse(sync.hasQueuedThread(t1));
331	<	assertTrue(sync.hasQueuedThread(t2));
332	<	sync.unlock();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	assertFalse(sync.hasQueuedThread(t1));
335	<	Thread.sleep(SHORT_DELAY_MS);
226	<	assertFalse(sync.hasQueuedThread(t2));
227	<	t1.join();
228	<	t2.join();
329	>	awaitTermination(t1);
330	>	assertFalse(lock.hasQueuedThread(t1));
331	>	assertTrue(lock.hasQueuedThread(t2));
332	>	lock.unlock();
333	>	awaitTermination(t2);
334	>	assertFalse(lock.hasQueuedThread(t1));
335	>	assertFalse(lock.hasQueuedThread(t2));
336		}
337
231	–
338		/**
339		* getQueuedThreads includes waiting threads
340		*/
341	<	public void testGetQueuedThreads() throws InterruptedException {
342	<	final PublicReentrantLock lock = new PublicReentrantLock();
341	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
342	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
343	>	public void testGetQueuedThreads(boolean fair) {
344	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
345		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
346		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
347		assertTrue(lock.getQueuedThreads().isEmpty());
348		lock.lock();
349		assertTrue(lock.getQueuedThreads().isEmpty());
350		t1.start();
351	<	Thread.sleep(SHORT_DELAY_MS);
351	>	waitForQueuedThread(lock, t1);
352	>	assertEquals(1, lock.getQueuedThreads().size());
353		assertTrue(lock.getQueuedThreads().contains(t1));
354		t2.start();
355	<	Thread.sleep(SHORT_DELAY_MS);
355	>	waitForQueuedThread(lock, t2);
356	>	assertEquals(2, lock.getQueuedThreads().size());
357		assertTrue(lock.getQueuedThreads().contains(t1));
358		assertTrue(lock.getQueuedThreads().contains(t2));
359		t1.interrupt();
360	<	Thread.sleep(SHORT_DELAY_MS);
360	>	awaitTermination(t1);
361		assertFalse(lock.getQueuedThreads().contains(t1));
362		assertTrue(lock.getQueuedThreads().contains(t2));
363	+	assertEquals(1, lock.getQueuedThreads().size());
364		lock.unlock();
365	<	Thread.sleep(SHORT_DELAY_MS);
365	>	awaitTermination(t2);
366		assertTrue(lock.getQueuedThreads().isEmpty());
256	–	t1.join();
257	–	t2.join();
367		}
368
260	–
369		/**
370	<	* timed tryLock is interruptible.
370	>	* timed tryLock is interruptible
371		*/
372	<	public void testInterruptedException2() throws InterruptedException {
373	<	final ReentrantLock lock = new ReentrantLock();
372	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
373	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
374	>	public void testTryLock_Interruptible(boolean fair) {
375	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
376		lock.lock();
377	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
377	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
378		public void realRun() throws InterruptedException {
379	<	lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS);
379	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
380		}});
381
382	<	t.start();
382	>	waitForQueuedThread(lock, t);
383		t.interrupt();
384	<	t.join();
384	>	awaitTermination(t);
385	>	releaseLock(lock);
386		}
387
277	–
388		/**
389	<	* TryLock on a locked lock fails
389	>	* tryLock on a locked lock fails
390		*/
391	<	public void testTryLockWhenLocked() throws InterruptedException {
392	<	final ReentrantLock lock = new ReentrantLock();
391	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
392	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
393	>	public void testTryLockWhenLocked(boolean fair) {
394	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
395		lock.lock();
396	<	Thread t = new Thread(new CheckedRunnable() {
396	>	Thread t = newStartedThread(new CheckedRunnable() {
397		public void realRun() {
398	<	threadAssertFalse(lock.tryLock());
398	>	assertFalse(lock.tryLock());
399		}});
400
401	<	t.start();
402	<	t.join();
291	<	lock.unlock();
401	>	awaitTermination(t);
402	>	releaseLock(lock);
403		}
404
405		/**
406		* Timed tryLock on a locked lock times out
407		*/
408	<	public void testTryLock_Timeout() throws InterruptedException {
409	<	final ReentrantLock lock = new ReentrantLock();
408	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
409	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
410	>	public void testTryLock_Timeout(boolean fair) {
411	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
412	>	final long timeoutMillis = timeoutMillis();
413		lock.lock();
414	<	Thread t = new Thread(new CheckedRunnable() {
414	>	Thread t = newStartedThread(new CheckedRunnable() {
415		public void realRun() throws InterruptedException {
416	<	threadAssertFalse(lock.tryLock(1, MILLISECONDS));
416	>	long startTime = System.nanoTime();
417	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
418	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
419		}});
420
421	<	t.start();
422	<	t.join();
307	<	lock.unlock();
421	>	awaitTermination(t);
422	>	releaseLock(lock);
423		}
424
425		/**
426		* getHoldCount returns number of recursive holds
427		*/
428	<	public void testGetHoldCount() {
429	<	ReentrantLock lock = new ReentrantLock();
428	>	public void testGetHoldCount()      { testGetHoldCount(false); }
429	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
430	>	public void testGetHoldCount(boolean fair) {
431	>	final ReentrantLock lock = new ReentrantLock(fair);
432		for (int i = 1; i <= SIZE; i++) {
433		lock.lock();
434		assertEquals(i, lock.getHoldCount());
435		}
436		for (int i = SIZE; i > 0; i--) {
437		lock.unlock();
438	<	assertEquals(i-1, lock.getHoldCount());
438	>	assertEquals(i - 1, lock.getHoldCount());
439		}
440		}
441
325	–
442		/**
443		* isLocked is true when locked and false when not
444		*/
445	<	public void testIsLocked() throws InterruptedException {
446	<	final ReentrantLock lock = new ReentrantLock();
447	<	lock.lock();
448	<	assertTrue(lock.isLocked());
449	<	lock.unlock();
450	<	assertFalse(lock.isLocked());
451	<	Thread t = new Thread(new CheckedRunnable() {
452	<	public void realRun() throws InterruptedException {
453	<	lock.lock();
454	<	Thread.sleep(SMALL_DELAY_MS);
455	<	lock.unlock();
456	<	}});
457	<
458	<	t.start();
459	<	Thread.sleep(SHORT_DELAY_MS);
460	<	assertTrue(lock.isLocked());
461	<	t.join();
462	<	assertFalse(lock.isLocked());
463	<	}
464	<
465	<
466	<	/**
467	<	* lockInterruptibly is interruptible.
468	<	*/
469	<	public void testLockInterruptibly1() throws InterruptedException {
470	<	final ReentrantLock lock = new ReentrantLock();
471	<	lock.lock();
472	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
473	<	t.start();
474	<	Thread.sleep(SHORT_DELAY_MS);
359	<	t.interrupt();
360	<	Thread.sleep(SHORT_DELAY_MS);
361	<	lock.unlock();
362	<	t.join();
445	>	public void testIsLocked()      { testIsLocked(false); }
446	>	public void testIsLocked_fair() { testIsLocked(true); }
447	>	public void testIsLocked(boolean fair) {
448	>	final ReentrantLock lock = new ReentrantLock(fair);
449	>	try {
450	>	assertFalse(lock.isLocked());
451	>	lock.lock();
452	>	assertTrue(lock.isLocked());
453	>	lock.lock();
454	>	assertTrue(lock.isLocked());
455	>	lock.unlock();
456	>	assertTrue(lock.isLocked());
457	>	lock.unlock();
458	>	assertFalse(lock.isLocked());
459	>	final CyclicBarrier barrier = new CyclicBarrier(2);
460	>	Thread t = newStartedThread(new CheckedRunnable() {
461	>	public void realRun() throws Exception {
462	>	lock.lock();
463	>	assertTrue(lock.isLocked());
464	>	barrier.await();
465	>	barrier.await();
466	>	lock.unlock();
467	>	}});
468	>
469	>	barrier.await();
470	>	assertTrue(lock.isLocked());
471	>	barrier.await();
472	>	awaitTermination(t);
473	>	assertFalse(lock.isLocked());
474	>	} catch (Exception fail) { threadUnexpectedException(fail); }
475		}
476
477		/**
478		* lockInterruptibly succeeds when unlocked, else is interruptible
479		*/
480	<	public void testLockInterruptibly2() throws InterruptedException {
481	<	final ReentrantLock lock = new ReentrantLock();
482	<	lock.lockInterruptibly();
483	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
484	<	t.start();
480	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
481	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
482	>	public void testLockInterruptibly(boolean fair) {
483	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
484	>	try {
485	>	lock.lockInterruptibly();
486	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
487	>	assertLockedByMoi(lock);
488	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
489	>	waitForQueuedThread(lock, t);
490		t.interrupt();
491		assertTrue(lock.isLocked());
492		assertTrue(lock.isHeldByCurrentThread());
493	<	t.join();
493	>	awaitTermination(t);
494	>	releaseLock(lock);
495		}
496
497		/**
498		* Calling await without holding lock throws IllegalMonitorStateException
499		*/
500	<	public void testAwait_IllegalMonitor() throws InterruptedException {
501	<	final ReentrantLock lock = new ReentrantLock();
502	<	final Condition c = lock.newCondition();
503	<	try {
504	<	c.await();
505	<	shouldThrow();
506	<	} catch (IllegalMonitorStateException success) {}
500	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
501	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
502	>	public void testAwait_IMSE(boolean fair) {
503	>	final ReentrantLock lock = new ReentrantLock(fair);
504	>	final Condition c = lock.newCondition();
505	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
506	>	long startTime = System.nanoTime();
507	>	try {
508	>	await(c, awaitMethod);
509	>	shouldThrow();
510	>	} catch (IllegalMonitorStateException success) {
511	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
512	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
513	>	}
514		}
515
516		/**
517		* Calling signal without holding lock throws IllegalMonitorStateException
518		*/
519	<	public void testSignal_IllegalMonitor() {
520	<	final ReentrantLock lock = new ReentrantLock();
519	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
520	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
521	>	public void testSignal_IMSE(boolean fair) {
522	>	final ReentrantLock lock = new ReentrantLock(fair);
523		final Condition c = lock.newCondition();
524		try {
525		c.signal();
#	Line 403 | Line 530 | public class ReentrantLockTest extends J
530		/**
531		* awaitNanos without a signal times out
532		*/
533	<	public void testAwaitNanos_Timeout() throws InterruptedException {
534	<	final ReentrantLock lock = new ReentrantLock();
533	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
534	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
535	>	public void testAwaitNanos_Timeout(boolean fair) {
536	>	final ReentrantLock lock = new ReentrantLock(fair);
537		final Condition c = lock.newCondition();
538	+	final long timeoutMillis = timeoutMillis();
539	+	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
540		lock.lock();
541	<	long t = c.awaitNanos(100);
542	<	assertTrue(t <= 0);
541	>	final long startTime = System.nanoTime();
542	>	try {
543	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
544	>	assertTrue(nanosRemaining <= 0);
545	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
546	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
547		lock.unlock();
548		}
549
550		/**
551	<	*  timed await without a signal times out
551	>	* timed await without a signal times out
552		*/
553	<	public void testAwait_Timeout() throws InterruptedException {
554	<	final ReentrantLock lock = new ReentrantLock();
553	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
554	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
555	>	public void testAwait_Timeout(boolean fair) {
556	>	final ReentrantLock lock = new ReentrantLock(fair);
557		final Condition c = lock.newCondition();
558	+	final long timeoutMillis = timeoutMillis();
559		lock.lock();
560	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
560	>	final long startTime = System.nanoTime();
561	>	try {
562	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
563	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
564	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
565		lock.unlock();
566		}
567
568		/**
569		* awaitUntil without a signal times out
570		*/
571	<	public void testAwaitUntil_Timeout() throws InterruptedException {
572	<	final ReentrantLock lock = new ReentrantLock();
571	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
572	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
573	>	public void testAwaitUntil_Timeout(boolean fair) {
574	>	final ReentrantLock lock = new ReentrantLock(fair);
575		final Condition c = lock.newCondition();
576		lock.lock();
577	<	java.util.Date d = new java.util.Date();
578	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
577	>	// We shouldn't assume that nanoTime and currentTimeMillis
578	>	// use the same time source, so don't use nanoTime here.
579	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
580	>	try {
581	>	assertFalse(c.awaitUntil(delayedDate));
582	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
583	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
584		lock.unlock();
585		}
586
587		/**
588		* await returns when signalled
589		*/
590	<	public void testAwait() throws InterruptedException {
591	<	final ReentrantLock lock = new ReentrantLock();
590	>	public void testAwait()      { testAwait(false); }
591	>	public void testAwait_fair() { testAwait(true); }
592	>	public void testAwait(boolean fair) {
593	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
594		final Condition c = lock.newCondition();
595	<	Thread t = new Thread(new CheckedRunnable() {
595	>	final CountDownLatch locked = new CountDownLatch(1);
596	>	Thread t = newStartedThread(new CheckedRunnable() {
597		public void realRun() throws InterruptedException {
598		lock.lock();
599	+	locked.countDown();
600		c.await();
601		lock.unlock();
602		}});
603
604	<	t.start();
452	<	Thread.sleep(SHORT_DELAY_MS);
604	>	await(locked);
605		lock.lock();
606	+	assertHasWaiters(lock, c, t);
607		c.signal();
608	+	assertHasNoWaiters(lock, c);
609	+	assertTrue(t.isAlive());
610		lock.unlock();
611	<	t.join(SHORT_DELAY_MS);
457	<	assertFalse(t.isAlive());
611	>	awaitTermination(t);
612		}
613
614		/**
615		* hasWaiters throws NPE if null
616		*/
617	<	public void testHasWaitersNPE() {
618	<	final ReentrantLock lock = new ReentrantLock();
617	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
618	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
619	>	public void testHasWaitersNPE(boolean fair) {
620	>	final ReentrantLock lock = new ReentrantLock(fair);
621		try {
622		lock.hasWaiters(null);
623		shouldThrow();
#	Line 471 | Line 627 | public class ReentrantLockTest extends J
627		/**
628		* getWaitQueueLength throws NPE if null
629		*/
630	<	public void testGetWaitQueueLengthNPE() {
631	<	final ReentrantLock lock = new ReentrantLock();
630	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
631	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
632	>	public void testGetWaitQueueLengthNPE(boolean fair) {
633	>	final ReentrantLock lock = new ReentrantLock(fair);
634		try {
635		lock.getWaitQueueLength(null);
636		shouldThrow();
637		} catch (NullPointerException success) {}
638		}
639
482	–
640		/**
641		* getWaitingThreads throws NPE if null
642		*/
643	<	public void testGetWaitingThreadsNPE() {
644	<	final PublicReentrantLock lock = new PublicReentrantLock();
643	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
644	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
645	>	public void testGetWaitingThreadsNPE(boolean fair) {
646	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
647		try {
648		lock.getWaitingThreads(null);
649		shouldThrow();
650		} catch (NullPointerException success) {}
651		}
652
494	–
653		/**
654	<	* hasWaiters throws IAE if not owned
654	>	* hasWaiters throws IllegalArgumentException if not owned
655		*/
656	<	public void testHasWaitersIAE() {
657	<	final ReentrantLock lock = new ReentrantLock();
656	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
657	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
658	>	public void testHasWaitersIAE(boolean fair) {
659	>	final ReentrantLock lock = new ReentrantLock(fair);
660		final Condition c = lock.newCondition();
661	<	final ReentrantLock lock2 = new ReentrantLock();
661	>	final ReentrantLock lock2 = new ReentrantLock(fair);
662		try {
663		lock2.hasWaiters(c);
664		shouldThrow();
#	Line 506 | Line 666 | public class ReentrantLockTest extends J
666		}
667
668		/**
669	<	* hasWaiters throws IMSE if not locked
669	>	* hasWaiters throws IllegalMonitorStateException if not locked
670		*/
671	<	public void testHasWaitersIMSE() {
672	<	final ReentrantLock lock = new ReentrantLock();
671	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
672	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
673	>	public void testHasWaitersIMSE(boolean fair) {
674	>	final ReentrantLock lock = new ReentrantLock(fair);
675		final Condition c = lock.newCondition();
676		try {
677		lock.hasWaiters(c);
#	Line 517 | Line 679 | public class ReentrantLockTest extends J
679		} catch (IllegalMonitorStateException success) {}
680		}
681
520	–
682		/**
683	<	* getWaitQueueLength throws IAE if not owned
683	>	* getWaitQueueLength throws IllegalArgumentException if not owned
684		*/
685	<	public void testGetWaitQueueLengthIAE() {
686	<	final ReentrantLock lock = new ReentrantLock();
685	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
686	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
687	>	public void testGetWaitQueueLengthIAE(boolean fair) {
688	>	final ReentrantLock lock = new ReentrantLock(fair);
689		final Condition c = lock.newCondition();
690	<	final ReentrantLock lock2 = new ReentrantLock();
690	>	final ReentrantLock lock2 = new ReentrantLock(fair);
691		try {
692		lock2.getWaitQueueLength(c);
693		shouldThrow();
#	Line 532 | Line 695 | public class ReentrantLockTest extends J
695		}
696
697		/**
698	<	* getWaitQueueLength throws IMSE if not locked
698	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
699		*/
700	<	public void testGetWaitQueueLengthIMSE() {
701	<	final ReentrantLock lock = new ReentrantLock();
700	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
701	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
702	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
703	>	final ReentrantLock lock = new ReentrantLock(fair);
704		final Condition c = lock.newCondition();
705		try {
706		lock.getWaitQueueLength(c);
#	Line 543 | Line 708 | public class ReentrantLockTest extends J
708		} catch (IllegalMonitorStateException success) {}
709		}
710
546	–
711		/**
712	<	* getWaitingThreads throws IAE if not owned
712	>	* getWaitingThreads throws IllegalArgumentException if not owned
713		*/
714	<	public void testGetWaitingThreadsIAE() {
715	<	final PublicReentrantLock lock = new PublicReentrantLock();
714	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
715	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
716	>	public void testGetWaitingThreadsIAE(boolean fair) {
717	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
718		final Condition c = lock.newCondition();
719	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
719	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
720		try {
721		lock2.getWaitingThreads(c);
722		shouldThrow();
#	Line 558 | Line 724 | public class ReentrantLockTest extends J
724		}
725
726		/**
727	<	* getWaitingThreads throws IMSE if not locked
727	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
728		*/
729	<	public void testGetWaitingThreadsIMSE() {
730	<	final PublicReentrantLock lock = new PublicReentrantLock();
729	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
730	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
731	>	public void testGetWaitingThreadsIMSE(boolean fair) {
732	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
733		final Condition c = lock.newCondition();
734		try {
735		lock.getWaitingThreads(c);
#	Line 569 | Line 737 | public class ReentrantLockTest extends J
737		} catch (IllegalMonitorStateException success) {}
738		}
739
572	–
740		/**
741		* hasWaiters returns true when a thread is waiting, else false
742		*/
743	<	public void testHasWaiters() throws InterruptedException {
744	<	final ReentrantLock lock = new ReentrantLock();
743	>	public void testHasWaiters()      { testHasWaiters(false); }
744	>	public void testHasWaiters_fair() { testHasWaiters(true); }
745	>	public void testHasWaiters(boolean fair) {
746	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
747		final Condition c = lock.newCondition();
748	<	Thread t = new Thread(new CheckedRunnable() {
748	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
749	>	Thread t = newStartedThread(new CheckedRunnable() {
750		public void realRun() throws InterruptedException {
751		lock.lock();
752	<	threadAssertFalse(lock.hasWaiters(c));
753	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
752	>	assertHasNoWaiters(lock, c);
753	>	assertFalse(lock.hasWaiters(c));
754	>	pleaseSignal.countDown();
755		c.await();
756	+	assertHasNoWaiters(lock, c);
757	+	assertFalse(lock.hasWaiters(c));
758		lock.unlock();
759		}});
760
761	<	t.start();
589	<	Thread.sleep(SHORT_DELAY_MS);
761	>	await(pleaseSignal);
762		lock.lock();
763	+	assertHasWaiters(lock, c, t);
764		assertTrue(lock.hasWaiters(c));
592	–	assertEquals(1, lock.getWaitQueueLength(c));
765		c.signal();
766	<	lock.unlock();
595	<	Thread.sleep(SHORT_DELAY_MS);
596	<	lock.lock();
766	>	assertHasNoWaiters(lock, c);
767		assertFalse(lock.hasWaiters(c));
598	–	assertEquals(0, lock.getWaitQueueLength(c));
768		lock.unlock();
769	<	t.join(SHORT_DELAY_MS);
770	<	assertFalse(t.isAlive());
769	>	awaitTermination(t);
770	>	assertHasNoWaiters(lock, c);
771		}
772
773		/**
774		* getWaitQueueLength returns number of waiting threads
775		*/
776	<	public void testGetWaitQueueLength() throws InterruptedException {
777	<	final ReentrantLock lock = new ReentrantLock();
776	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
777	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
778	>	public void testGetWaitQueueLength(boolean fair) {
779	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
780		final Condition c = lock.newCondition();
781	+	final CountDownLatch locked1 = new CountDownLatch(1);
782	+	final CountDownLatch locked2 = new CountDownLatch(1);
783		Thread t1 = new Thread(new CheckedRunnable() {
784		public void realRun() throws InterruptedException {
785		lock.lock();
786	<	threadAssertFalse(lock.hasWaiters(c));
787	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
786	>	assertFalse(lock.hasWaiters(c));
787	>	assertEquals(0, lock.getWaitQueueLength(c));
788	>	locked1.countDown();
789		c.await();
790		lock.unlock();
791		}});
#	Line 619 | Line 793 | public class ReentrantLockTest extends J
793		Thread t2 = new Thread(new CheckedRunnable() {
794		public void realRun() throws InterruptedException {
795		lock.lock();
796	<	threadAssertTrue(lock.hasWaiters(c));
797	<	threadAssertEquals(1, lock.getWaitQueueLength(c));
796	>	assertTrue(lock.hasWaiters(c));
797	>	assertEquals(1, lock.getWaitQueueLength(c));
798	>	locked2.countDown();
799		c.await();
800		lock.unlock();
801		}});
802
803	+	lock.lock();
804	+	assertEquals(0, lock.getWaitQueueLength(c));
805	+	lock.unlock();
806	+
807		t1.start();
808	<	Thread.sleep(SHORT_DELAY_MS);
808	>	await(locked1);
809	>
810	>	lock.lock();
811	>	assertHasWaiters(lock, c, t1);
812	>	assertEquals(1, lock.getWaitQueueLength(c));
813	>	lock.unlock();
814	>
815		t2.start();
816	<	Thread.sleep(SHORT_DELAY_MS);
816	>	await(locked2);
817	>
818		lock.lock();
819	<	assertTrue(lock.hasWaiters(c));
819	>	assertHasWaiters(lock, c, t1, t2);
820		assertEquals(2, lock.getWaitQueueLength(c));
821		c.signalAll();
822	+	assertHasNoWaiters(lock, c);
823		lock.unlock();
824	<	Thread.sleep(SHORT_DELAY_MS);
825	<	lock.lock();
826	<	assertFalse(lock.hasWaiters(c));
827	<	assertEquals(0, lock.getWaitQueueLength(c));
828	<	lock.unlock();
642	<	t1.join(SHORT_DELAY_MS);
643	<	t2.join(SHORT_DELAY_MS);
644	<	assertFalse(t1.isAlive());
645	<	assertFalse(t2.isAlive());
824	>
825	>	awaitTermination(t1);
826	>	awaitTermination(t2);
827	>
828	>	assertHasNoWaiters(lock, c);
829		}
830
831		/**
832		* getWaitingThreads returns only and all waiting threads
833		*/
834	<	public void testGetWaitingThreads() throws InterruptedException {
835	<	final PublicReentrantLock lock = new PublicReentrantLock();
834	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
835	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
836	>	public void testGetWaitingThreads(boolean fair) {
837	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
838		final Condition c = lock.newCondition();
839	+	final CountDownLatch locked1 = new CountDownLatch(1);
840	+	final CountDownLatch locked2 = new CountDownLatch(1);
841		Thread t1 = new Thread(new CheckedRunnable() {
842		public void realRun() throws InterruptedException {
843		lock.lock();
844	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
844	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
845	>	locked1.countDown();
846		c.await();
847		lock.unlock();
848		}});
#	Line 662 | Line 850 | public class ReentrantLockTest extends J
850		Thread t2 = new Thread(new CheckedRunnable() {
851		public void realRun() throws InterruptedException {
852		lock.lock();
853	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
853	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
854	>	locked2.countDown();
855		c.await();
856		lock.unlock();
857		}});
#	Line 670 | Line 859 | public class ReentrantLockTest extends J
859		lock.lock();
860		assertTrue(lock.getWaitingThreads(c).isEmpty());
861		lock.unlock();
862	+
863		t1.start();
864	<	Thread.sleep(SHORT_DELAY_MS);
864	>	await(locked1);
865	>
866	>	lock.lock();
867	>	assertHasWaiters(lock, c, t1);
868	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
869	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
870	>	assertEquals(1, lock.getWaitingThreads(c).size());
871	>	lock.unlock();
872	>
873		t2.start();
874	<	Thread.sleep(SHORT_DELAY_MS);
874	>	await(locked2);
875	>
876		lock.lock();
877	<	assertTrue(lock.hasWaiters(c));
877	>	assertHasWaiters(lock, c, t1, t2);
878		assertTrue(lock.getWaitingThreads(c).contains(t1));
879		assertTrue(lock.getWaitingThreads(c).contains(t2));
880	+	assertEquals(2, lock.getWaitingThreads(c).size());
881		c.signalAll();
882	+	assertHasNoWaiters(lock, c);
883		lock.unlock();
683	–	Thread.sleep(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	–	}
884
885	<	/** A helper class for uninterruptible wait tests */
886	<	class UninterruptibleThread extends Thread {
696	<	private ReentrantLock lock;
697	<	private Condition c;
885	>	awaitTermination(t1);
886	>	awaitTermination(t2);
887
888	<	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	<	}
707	<
708	<	public synchronized void run() {
709	<	lock.lock();
710	<	lockStarted = true;
711	<
712	<	while (!canAwake) {
713	<	c.awaitUninterruptibly();
714	<	}
715	<
716	<	interrupted = isInterrupted();
717	<	lock.unlock();
718	<	}
888	>	assertHasNoWaiters(lock, c);
889		}
890
891		/**
892	<	* awaitUninterruptibly doesn't abort on interrupt
892	>	* awaitUninterruptibly is uninterruptible
893		*/
894	<	public void testAwaitUninterruptibly() throws InterruptedException {
895	<	final ReentrantLock lock = new ReentrantLock();
896	<	final Condition c = lock.newCondition();
897	<	UninterruptibleThread thread = new UninterruptibleThread(lock, c);
894	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
895	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
896	>	public void testAwaitUninterruptibly(boolean fair) {
897	>	final ReentrantLock lock = new ReentrantLock(fair);
898	>	final Condition condition = lock.newCondition();
899	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
900
901	<	thread.start();
901	>	Thread t1 = newStartedThread(new CheckedRunnable() {
902	>	public void realRun() {
903	>	// Interrupt before awaitUninterruptibly
904	>	lock.lock();
905	>	pleaseInterrupt.countDown();
906	>	Thread.currentThread().interrupt();
907	>	condition.awaitUninterruptibly();
908	>	assertTrue(Thread.interrupted());
909	>	lock.unlock();
910	>	}});
911
912	<	while (!thread.lockStarted) {
913	<	Thread.sleep(100);
914	<	}
912	>	Thread t2 = newStartedThread(new CheckedRunnable() {
913	>	public void realRun() {
914	>	// Interrupt during awaitUninterruptibly
915	>	lock.lock();
916	>	pleaseInterrupt.countDown();
917	>	condition.awaitUninterruptibly();
918	>	assertTrue(Thread.interrupted());
919	>	lock.unlock();
920	>	}});
921
922	+	await(pleaseInterrupt);
923	+	t2.interrupt();
924		lock.lock();
925	<	try {
926	<	thread.interrupt();
927	<	thread.canAwake = true;
739	<	c.signal();
740	<	} finally {
741	<	lock.unlock();
742	<	}
743	<
744	<	thread.join();
745	<	assertTrue(thread.interrupted);
746	<	assertFalse(thread.isAlive());
747	<	}
925	>	lock.unlock();
926	>	assertThreadBlocks(t1, Thread.State.WAITING);
927	>	assertThreadBlocks(t2, Thread.State.WAITING);
928
929	<	/**
930	<	* await is interruptible
931	<	*/
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	<	}});
929	>	lock.lock();
930	>	condition.signalAll();
931	>	lock.unlock();
932
933	<	t.start();
934	<	Thread.sleep(SHORT_DELAY_MS);
763	<	t.interrupt();
764	<	t.join(SHORT_DELAY_MS);
765	<	assertFalse(t.isAlive());
933	>	awaitTermination(t1);
934	>	awaitTermination(t2);
935		}
936
937		/**
938	<	* awaitNanos is interruptible
938	>	* await/awaitNanos/awaitUntil is interruptible
939		*/
940	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
941	<	final ReentrantLock lock = new ReentrantLock();
940	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
941	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
942	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
943	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
944	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
945	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
946	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
947	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
948	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
949	>	final PublicReentrantLock lock =
950	>	new PublicReentrantLock(fair);
951		final Condition c = lock.newCondition();
952	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
952	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
953	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
954		public void realRun() throws InterruptedException {
955		lock.lock();
956	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
956	>	assertLockedByMoi(lock);
957	>	assertHasNoWaiters(lock, c);
958	>	pleaseInterrupt.countDown();
959	>	try {
960	>	await(c, awaitMethod);
961	>	} finally {
962	>	assertLockedByMoi(lock);
963	>	assertHasNoWaiters(lock, c);
964	>	lock.unlock();
965	>	assertFalse(Thread.interrupted());
966	>	}
967		}});
968
969	<	t.start();
970	<	Thread.sleep(SHORT_DELAY_MS);
969	>	await(pleaseInterrupt);
970	>	assertHasWaiters(lock, c, t);
971		t.interrupt();
972	<	t.join(SHORT_DELAY_MS);
973	<	assertFalse(t.isAlive());
972	>	awaitTermination(t);
973	>	assertNotLocked(lock);
974		}
975
976		/**
977	<	* awaitUntil is interruptible
977	>	* signalAll wakes up all threads
978		*/
979	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
980	<	final ReentrantLock lock = new ReentrantLock();
979	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
980	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
981	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
982	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
983	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
984	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
985	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
986	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
987	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
988	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
989		final Condition c = lock.newCondition();
990	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
990	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
991	>	class Awaiter extends CheckedRunnable {
992		public void realRun() throws InterruptedException {
993		lock.lock();
994	<	java.util.Date d = new java.util.Date();
995	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
996	<	}});
994	>	pleaseSignal.countDown();
995	>	await(c, awaitMethod);
996	>	lock.unlock();
997	>	}
998	>	}
999
1000	<	t.start();
1001	<	Thread.sleep(SHORT_DELAY_MS);
1002	<	t.interrupt();
1003	<	t.join(SHORT_DELAY_MS);
1004	<	assertFalse(t.isAlive());
1000	>	Thread t1 = newStartedThread(new Awaiter());
1001	>	Thread t2 = newStartedThread(new Awaiter());
1002	>
1003	>	await(pleaseSignal);
1004	>	lock.lock();
1005	>	assertHasWaiters(lock, c, t1, t2);
1006	>	c.signalAll();
1007	>	assertHasNoWaiters(lock, c);
1008	>	lock.unlock();
1009	>	awaitTermination(t1);
1010	>	awaitTermination(t2);
1011		}
1012
1013		/**
1014	<	* signalAll wakes up all threads
1014	>	* signal wakes up waiting threads in FIFO order
1015		*/
1016	<	public void testSignalAll() throws InterruptedException {
1017	<	final ReentrantLock lock = new ReentrantLock();
1016	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1017	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1018	>	public void testSignalWakesFifo(boolean fair) {
1019	>	final PublicReentrantLock lock =
1020	>	new PublicReentrantLock(fair);
1021		final Condition c = lock.newCondition();
1022	<	Thread t1 = new Thread(new CheckedRunnable() {
1022	>	final CountDownLatch locked1 = new CountDownLatch(1);
1023	>	final CountDownLatch locked2 = new CountDownLatch(1);
1024	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1025		public void realRun() throws InterruptedException {
1026		lock.lock();
1027	+	locked1.countDown();
1028		c.await();
1029		lock.unlock();
1030		}});
1031
1032	<	Thread t2 = new Thread(new CheckedRunnable() {
1032	>	await(locked1);
1033	>
1034	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1035		public void realRun() throws InterruptedException {
1036		lock.lock();
1037	+	locked2.countDown();
1038		c.await();
1039		lock.unlock();
1040		}});
1041
1042	<	t1.start();
1043	<	t2.start();
829	<	Thread.sleep(SHORT_DELAY_MS);
1042	>	await(locked2);
1043	>
1044		lock.lock();
1045	<	c.signalAll();
1045	>	assertHasWaiters(lock, c, t1, t2);
1046	>	assertFalse(lock.hasQueuedThreads());
1047	>	c.signal();
1048	>	assertHasWaiters(lock, c, t2);
1049	>	assertTrue(lock.hasQueuedThread(t1));
1050	>	assertFalse(lock.hasQueuedThread(t2));
1051	>	c.signal();
1052	>	assertHasNoWaiters(lock, c);
1053	>	assertTrue(lock.hasQueuedThread(t1));
1054	>	assertTrue(lock.hasQueuedThread(t2));
1055		lock.unlock();
1056	<	t1.join(SHORT_DELAY_MS);
1057	<	t2.join(SHORT_DELAY_MS);
835	<	assertFalse(t1.isAlive());
836	<	assertFalse(t2.isAlive());
1056	>	awaitTermination(t1);
1057	>	awaitTermination(t2);
1058		}
1059
1060		/**
1061		* await after multiple reentrant locking preserves lock count
1062		*/
1063	<	public void testAwaitLockCount() throws InterruptedException {
1064	<	final ReentrantLock lock = new ReentrantLock();
1063	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1064	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1065	>	public void testAwaitLockCount(boolean fair) {
1066	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1067		final Condition c = lock.newCondition();
1068	<	Thread t1 = new Thread(new CheckedRunnable() {
1068	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1069	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1070		public void realRun() throws InterruptedException {
1071		lock.lock();
1072	<	threadAssertEquals(1, lock.getHoldCount());
1072	>	assertLockedByMoi(lock);
1073	>	assertEquals(1, lock.getHoldCount());
1074	>	pleaseSignal.countDown();
1075		c.await();
1076	<	threadAssertEquals(1, lock.getHoldCount());
1076	>	assertLockedByMoi(lock);
1077	>	assertEquals(1, lock.getHoldCount());
1078		lock.unlock();
1079		}});
1080
1081	<	Thread t2 = new Thread(new CheckedRunnable() {
1081	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1082		public void realRun() throws InterruptedException {
1083		lock.lock();
1084		lock.lock();
1085	<	threadAssertEquals(2, lock.getHoldCount());
1085	>	assertLockedByMoi(lock);
1086	>	assertEquals(2, lock.getHoldCount());
1087	>	pleaseSignal.countDown();
1088		c.await();
1089	<	threadAssertEquals(2, lock.getHoldCount());
1089	>	assertLockedByMoi(lock);
1090	>	assertEquals(2, lock.getHoldCount());
1091		lock.unlock();
1092		lock.unlock();
1093		}});
1094
1095	<	t1.start();
866	<	t2.start();
867	<	Thread.sleep(SHORT_DELAY_MS);
1095	>	await(pleaseSignal);
1096		lock.lock();
1097	+	assertHasWaiters(lock, c, t1, t2);
1098	+	assertEquals(1, lock.getHoldCount());
1099		c.signalAll();
1100	+	assertHasNoWaiters(lock, c);
1101		lock.unlock();
1102	<	t1.join(SHORT_DELAY_MS);
1103	<	t2.join(SHORT_DELAY_MS);
873	<	assertFalse(t1.isAlive());
874	<	assertFalse(t2.isAlive());
1102	>	awaitTermination(t1);
1103	>	awaitTermination(t2);
1104		}
1105
1106		/**
1107		* A serialized lock deserializes as unlocked
1108		*/
1109	<	public void testSerialization() throws Exception {
1110	<	ReentrantLock l = new ReentrantLock();
1111	<	l.lock();
1112	<	l.unlock();
1113	<
1114	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1115	<	ObjectOutputStream out =
1116	<	new ObjectOutputStream(new BufferedOutputStream(bout));
1117	<	out.writeObject(l);
1118	<	out.close();
1119	<
1120	<	ByteArrayInputStream bin =
1121	<	new ByteArrayInputStream(bout.toByteArray());
1122	<	ObjectInputStream in =
1123	<	new ObjectInputStream(new BufferedInputStream(bin));
1124	<	ReentrantLock r = (ReentrantLock) in.readObject();
1125	<	r.lock();
1126	<	r.unlock();
1109	>	public void testSerialization()      { testSerialization(false); }
1110	>	public void testSerialization_fair() { testSerialization(true); }
1111	>	public void testSerialization(boolean fair) {
1112	>	final ReentrantLock lock = new ReentrantLock(fair);
1113	>	lock.lock();
1114	>
1115	>	ReentrantLock clone = serialClone(lock);
1116	>	assertEquals(lock.isFair(), clone.isFair());
1117	>	assertTrue(lock.isLocked());
1118	>	assertFalse(clone.isLocked());
1119	>	assertEquals(1, lock.getHoldCount());
1120	>	assertEquals(0, clone.getHoldCount());
1121	>	clone.lock();
1122	>	clone.lock();
1123	>	assertTrue(clone.isLocked());
1124	>	assertEquals(2, clone.getHoldCount());
1125	>	assertEquals(1, lock.getHoldCount());
1126	>	clone.unlock();
1127	>	clone.unlock();
1128	>	assertTrue(lock.isLocked());
1129	>	assertFalse(clone.isLocked());
1130		}
1131
1132		/**
1133		* toString indicates current lock state
1134		*/
1135	<	public void testToString() {
1136	<	ReentrantLock lock = new ReentrantLock();
1137	<	String us = lock.toString();
1138	<	assertTrue(us.indexOf("Unlocked") >= 0);
1135	>	public void testToString()      { testToString(false); }
1136	>	public void testToString_fair() { testToString(true); }
1137	>	public void testToString(boolean fair) {
1138	>	final ReentrantLock lock = new ReentrantLock(fair);
1139	>	assertTrue(lock.toString().contains("Unlocked"));
1140	>	lock.lock();
1141	>	assertTrue(lock.toString().contains("Locked by"));
1142	>	lock.unlock();
1143	>	assertTrue(lock.toString().contains("Unlocked"));
1144	>	}
1145	>
1146	>	/**
1147	>	* Tests scenario for JDK-8187408
1148	>	* AbstractQueuedSynchronizer wait queue corrupted when thread awaits without holding the lock
1149	>	*/
1150	>	public void testBug8187408() throws InterruptedException {
1151	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
1152	>	final AwaitMethod awaitMethod = randomAwaitMethod();
1153	>	final int nThreads = rnd.nextInt(2, 10);
1154	>	final ReentrantLock lock = new ReentrantLock();
1155	>	final Condition cond = lock.newCondition();
1156	>	final CountDownLatch done = new CountDownLatch(nThreads);
1157	>	final ArrayList<Thread> threads = new ArrayList<>();
1158	>
1159	>	Runnable rogue = () -> {
1160	>	while (done.getCount() > 0) {
1161	>	try {
1162	>	// call await without holding lock?!
1163	>	await(cond, awaitMethod);
1164	>	throw new AssertionError("should throw");
1165	>	}
1166	>	catch (IllegalMonitorStateException success) {}
1167	>	catch (Throwable fail) { threadUnexpectedException(fail); }}};
1168	>	Thread rogueThread = new Thread(rogue, "rogue");
1169	>	threads.add(rogueThread);
1170	>	rogueThread.start();
1171	>
1172	>	Runnable waiter = () -> {
1173	>	lock.lock();
1174	>	try {
1175	>	done.countDown();
1176	>	cond.await();
1177	>	} catch (Throwable fail) {
1178	>	threadUnexpectedException(fail);
1179	>	} finally {
1180	>	lock.unlock();
1181	>	}};
1182	>	for (int i = 0; i < nThreads; i++) {
1183	>	Thread thread = new Thread(waiter, "waiter");
1184	>	threads.add(thread);
1185	>	thread.start();
1186	>	}
1187	>
1188	>	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
1189		lock.lock();
1190	<	String ls = lock.toString();
1191	<	assertTrue(ls.indexOf("Locked") >= 0);
1190	>	try {
1191	>	assertEquals(nThreads, lock.getWaitQueueLength(cond));
1192	>	} finally {
1193	>	cond.signalAll();
1194	>	lock.unlock();
1195	>	}
1196	>	for (Thread thread : threads) {
1197	>	thread.join(LONG_DELAY_MS);
1198	>	assertFalse(thread.isAlive());
1199	>	}
1200		}
1201
1202	+	/**
1203	+	* ThreadMXBean reports the blockers that we expect.
1204	+	*/
1205	+	public void testBlockers() {
1206	+	if (!testImplementationDetails) return;
1207	+	final boolean fair = randomBoolean();
1208	+	final boolean timedAcquire = randomBoolean();
1209	+	final boolean timedAwait = randomBoolean();
1210	+	final String syncClassName = fair
1211	+	? "ReentrantLock$FairSync"
1212	+	: "ReentrantLock$NonfairSync";
1213	+	final String conditionClassName
1214	+	= "AbstractQueuedSynchronizer$ConditionObject";
1215	+	final Thread.State expectedAcquireState = timedAcquire
1216	+	? Thread.State.TIMED_WAITING
1217	+	: Thread.State.WAITING;
1218	+	final Thread.State expectedAwaitState = timedAwait
1219	+	? Thread.State.TIMED_WAITING
1220	+	: Thread.State.WAITING;
1221	+	final Lock lock = new ReentrantLock(fair);
1222	+	final Condition condition = lock.newCondition();
1223	+	final AtomicBoolean conditionSatisfied = new AtomicBoolean(false);
1224	+	lock.lock();
1225	+	final Thread thread = newStartedThread((Action) () -> {
1226	+	if (timedAcquire)
1227	+	lock.tryLock(LONGER_DELAY_MS, MILLISECONDS);
1228	+	else
1229	+	lock.lock();
1230	+	while (!conditionSatisfied.get())
1231	+	if (timedAwait)
1232	+	condition.await(LONGER_DELAY_MS, MILLISECONDS);
1233	+	else
1234	+	condition.await();
1235	+	});
1236	+	Callable<Boolean> waitingForLock = () -> {
1237	+	String className;
1238	+	return thread.getState() == expectedAcquireState
1239	+	&& (className = blockerClassName(thread)) != null
1240	+	&& className.endsWith(syncClassName);
1241	+	};
1242	+	waitForThreadToEnterWaitState(thread, waitingForLock);
1243	+
1244	+	lock.unlock();
1245	+	Callable<Boolean> waitingForCondition = () -> {
1246	+	String className;
1247	+	return thread.getState() == expectedAwaitState
1248	+	&& (className = blockerClassName(thread)) != null
1249	+	&& className.endsWith(conditionClassName);
1250	+	};
1251	+	waitForThreadToEnterWaitState(thread, waitingForCondition);
1252	+
1253	+	// politely release the waiter
1254	+	conditionSatisfied.set(true);
1255	+	lock.lock();
1256	+	try {
1257	+	condition.signal();
1258	+	} finally { lock.unlock(); }
1259	+
1260	+	awaitTermination(thread);
1261	+	}
1262		}

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