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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.24 by dl, Fri Feb 24 00:03:16 2006 UTC vs.
Revision 1.68 by jsr166, Tue Jan 23 20:44:11 2018 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.util.*;
13	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
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.CountDownLatch;
16	+	import java.util.concurrent.CyclicBarrier;
17	+	import java.util.concurrent.ThreadLocalRandom;
18	+	import java.util.concurrent.locks.Condition;
19	+	import java.util.concurrent.locks.ReentrantLock;
20	+
21	+	import junit.framework.Test;
22	+	import junit.framework.TestSuite;
23	+
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class ReentrantLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30	<	return new TestSuite(ReentrantLockTest.class);
30	>	return new TestSuite(ReentrantLockTest.class);
31		}
32
33		/**
34	<	* A runnable calling lockInterruptibly
34	>	* A checked runnable calling lockInterruptibly
35		*/
36	<	class InterruptibleLockRunnable implements Runnable {
36	>	class InterruptibleLockRunnable extends CheckedRunnable {
37		final ReentrantLock lock;
38	<	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
39	<	public void run() {
40	<	try {
31	<	lock.lockInterruptibly();
32	<	} catch(InterruptedException success){}
38	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
39	>	public void realRun() throws InterruptedException {
40	>	lock.lockInterruptibly();
41		}
42		}
43
36	–
44		/**
45	<	* A runnable calling lockInterruptibly that expects to be
45	>	* A checked runnable calling lockInterruptibly that expects to be
46		* interrupted
47		*/
48	<	class InterruptedLockRunnable implements Runnable {
48	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
49		final ReentrantLock lock;
50	<	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
51	<	public void run() {
52	<	try {
46	<	lock.lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
50	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
51	>	public void realRun() throws InterruptedException {
52	>	lock.lockInterruptibly();
53		}
54		}
55
#	Line 54 | Line 58 | public class ReentrantLockTest extends J
58		*/
59		static class PublicReentrantLock extends ReentrantLock {
60		PublicReentrantLock() { super(); }
61	<	public Collection<Thread> getQueuedThreads() {
62	<	return super.getQueuedThreads();
61	>	PublicReentrantLock(boolean fair) { super(fair); }
62	>	public Thread getOwner() {
63	>	return super.getOwner();
64	>	}
65	>	public Collection<Thread> getQueuedThreads() {
66	>	return super.getQueuedThreads();
67		}
68	<	public Collection<Thread> getWaitingThreads(Condition c) {
69	<	return super.getWaitingThreads(c);
68	>	public Collection<Thread> getWaitingThreads(Condition c) {
69	>	return super.getWaitingThreads(c);
70		}
71	+	}
72
73	+	/**
74	+	* Releases write lock, checking that it had a hold count of 1.
75	+	*/
76	+	void releaseLock(PublicReentrantLock lock) {
77	+	assertLockedByMoi(lock);
78	+	lock.unlock();
79	+	assertFalse(lock.isHeldByCurrentThread());
80	+	assertNotLocked(lock);
81	+	}
82
83	+	/**
84	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85	+	*/
86	+	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
87	+	long startTime = System.nanoTime();
88	+	while (!lock.hasQueuedThread(t)) {
89	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	+	throw new AssertionError("timed out");
91	+	Thread.yield();
92	+	}
93	+	assertTrue(t.isAlive());
94	+	assertNotSame(t, lock.getOwner());
95		}
96
97		/**
98	<	* Constructor sets given fairness
98	>	* Checks that lock is not locked.
99		*/
100	<	public void testConstructor() {
101	<	ReentrantLock rl = new ReentrantLock();
102	<	assertFalse(rl.isFair());
103	<	ReentrantLock r2 = new ReentrantLock(true);
104	<	assertTrue(r2.isFair());
100	>	void assertNotLocked(PublicReentrantLock lock) {
101	>	assertFalse(lock.isLocked());
102	>	assertFalse(lock.isHeldByCurrentThread());
103	>	assertNull(lock.getOwner());
104	>	assertEquals(0, lock.getHoldCount());
105		}
106
107		/**
108	<	* locking an unlocked lock succeeds
108	>	* Checks that lock is locked by the given thread.
109		*/
110	<	public void testLock() {
111	<	ReentrantLock rl = new ReentrantLock();
112	<	rl.lock();
113	<	assertTrue(rl.isLocked());
114	<	rl.unlock();
110	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
111	>	assertTrue(lock.isLocked());
112	>	assertSame(t, lock.getOwner());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.isHeldByCurrentThread());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.getHoldCount() > 0);
117		}
118
119		/**
120	<	* locking an unlocked fair lock succeeds
120	>	* Checks that lock is locked by the current thread.
121		*/
122	<	public void testFairLock() {
123	<	ReentrantLock rl = new ReentrantLock(true);
92	<	rl.lock();
93	<	assertTrue(rl.isLocked());
94	<	rl.unlock();
122	>	void assertLockedByMoi(PublicReentrantLock lock) {
123	>	assertLockedBy(lock, Thread.currentThread());
124		}
125
126		/**
127	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
127	>	* Checks that condition c has no waiters.
128		*/
129	<	public void testUnlock_IllegalMonitorStateException() {
130	<	ReentrantLock rl = new ReentrantLock();
131	<	try {
103	<	rl.unlock();
104	<	shouldThrow();
129	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131	>	}
132
133	<	} catch(IllegalMonitorStateException success){}
133	>	/**
134	>	* Checks that condition c has exactly the given waiter threads.
135	>	*/
136	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
137	>	Thread... threads) {
138	>	lock.lock();
139	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
140	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
141	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
142	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
143	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
144	>	new HashSet<Thread>(Arrays.asList(threads)));
145	>	lock.unlock();
146	>	}
147	>
148	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
149	>
150	>	static AwaitMethod randomAwaitMethod() {
151	>	AwaitMethod[] awaitMethods = AwaitMethod.values();
152	>	return awaitMethods[ThreadLocalRandom.current().nextInt(awaitMethods.length)];
153		}
154
155		/**
156	<	* tryLock on an unlocked lock succeeds
156	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
157		*/
158	<	public void testTryLock() {
159	<	ReentrantLock rl = new ReentrantLock();
160	<	assertTrue(rl.tryLock());
161	<	assertTrue(rl.isLocked());
162	<	rl.unlock();
158	>	void await(Condition c, AwaitMethod awaitMethod)
159	>	throws InterruptedException {
160	>	long timeoutMillis = 2 * LONG_DELAY_MS;
161	>	switch (awaitMethod) {
162	>	case await:
163	>	c.await();
164	>	break;
165	>	case awaitTimed:
166	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
167	>	break;
168	>	case awaitNanos:
169	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
170	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
171	>	assertTrue(nanosRemaining > timeoutNanos / 2);
172	>	assertTrue(nanosRemaining <= timeoutNanos);
173	>	break;
174	>	case awaitUntil:
175	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
176	>	break;
177	>	default:
178	>	throw new AssertionError();
179	>	}
180		}
181
182	+	/**
183	+	* Constructor sets given fairness, and is in unlocked state
184	+	*/
185	+	public void testConstructor() {
186	+	PublicReentrantLock lock;
187	+
188	+	lock = new PublicReentrantLock();
189	+	assertFalse(lock.isFair());
190	+	assertNotLocked(lock);
191	+
192	+	lock = new PublicReentrantLock(true);
193	+	assertTrue(lock.isFair());
194	+	assertNotLocked(lock);
195	+
196	+	lock = new PublicReentrantLock(false);
197	+	assertFalse(lock.isFair());
198	+	assertNotLocked(lock);
199	+	}
200
201		/**
202	<	* hasQueuedThreads reports whether there are waiting threads
202	>	* locking an unlocked lock succeeds
203		*/
204	<	public void testhasQueuedThreads() {
205	<	final ReentrantLock lock = new ReentrantLock();
206	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
207	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
204	>	public void testLock()      { testLock(false); }
205	>	public void testLock_fair() { testLock(true); }
206	>	public void testLock(boolean fair) {
207	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
208	>	lock.lock();
209	>	assertLockedByMoi(lock);
210	>	releaseLock(lock);
211	>	}
212	>
213	>	/**
214	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
215	>	*/
216	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
217	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
218	>	public void testUnlock_IMSE(boolean fair) {
219	>	final ReentrantLock lock = new ReentrantLock(fair);
220		try {
128	–	assertFalse(lock.hasQueuedThreads());
129	–	lock.lock();
130	–	t1.start();
131	–	Thread.sleep(SHORT_DELAY_MS);
132	–	assertTrue(lock.hasQueuedThreads());
133	–	t2.start();
134	–	Thread.sleep(SHORT_DELAY_MS);
135	–	assertTrue(lock.hasQueuedThreads());
136	–	t1.interrupt();
137	–	Thread.sleep(SHORT_DELAY_MS);
138	–	assertTrue(lock.hasQueuedThreads());
221		lock.unlock();
222	<	Thread.sleep(SHORT_DELAY_MS);
223	<	assertFalse(lock.hasQueuedThreads());
224	<	t1.join();
143	<	t2.join();
144	<	} catch(Exception e){
145	<	unexpectedException();
146	<	}
147	<	}
222	>	shouldThrow();
223	>	} catch (IllegalMonitorStateException success) {}
224	>	}
225
226		/**
227	<	* getQueueLength reports number of waiting threads
227	>	* tryLock on an unlocked lock succeeds
228		*/
229	<	public void testGetQueueLength() {
230	<	final ReentrantLock lock = new ReentrantLock();
229	>	public void testTryLock()      { testTryLock(false); }
230	>	public void testTryLock_fair() { testTryLock(true); }
231	>	public void testTryLock(boolean fair) {
232	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
233	>	assertTrue(lock.tryLock());
234	>	assertLockedByMoi(lock);
235	>	assertTrue(lock.tryLock());
236	>	assertLockedByMoi(lock);
237	>	lock.unlock();
238	>	releaseLock(lock);
239	>	}
240	>
241	>	/**
242	>	* hasQueuedThreads reports whether there are waiting threads
243	>	*/
244	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
245	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
246	>	public void testHasQueuedThreads(boolean fair) {
247	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
248		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
249		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
250	<	try {
251	<	assertEquals(0, lock.getQueueLength());
252	<	lock.lock();
253	<	t1.start();
254	<	Thread.sleep(SHORT_DELAY_MS);
255	<	assertEquals(1, lock.getQueueLength());
256	<	t2.start();
257	<	Thread.sleep(SHORT_DELAY_MS);
258	<	assertEquals(2, lock.getQueueLength());
259	<	t1.interrupt();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	assertEquals(1, lock.getQueueLength());
262	<	lock.unlock();
263	<	Thread.sleep(SHORT_DELAY_MS);
264	<	assertEquals(0, lock.getQueueLength());
265	<	t1.join();
172	<	t2.join();
173	<	} catch(Exception e){
174	<	unexpectedException();
175	<	}
176	<	}
250	>	assertFalse(lock.hasQueuedThreads());
251	>	lock.lock();
252	>	assertFalse(lock.hasQueuedThreads());
253	>	t1.start();
254	>	waitForQueuedThread(lock, t1);
255	>	assertTrue(lock.hasQueuedThreads());
256	>	t2.start();
257	>	waitForQueuedThread(lock, t2);
258	>	assertTrue(lock.hasQueuedThreads());
259	>	t1.interrupt();
260	>	awaitTermination(t1);
261	>	assertTrue(lock.hasQueuedThreads());
262	>	lock.unlock();
263	>	awaitTermination(t2);
264	>	assertFalse(lock.hasQueuedThreads());
265	>	}
266
267		/**
268		* getQueueLength reports number of waiting threads
269		*/
270	<	public void testGetQueueLength_fair() {
271	<	final ReentrantLock lock = new ReentrantLock(true);
270	>	public void testGetQueueLength()      { testGetQueueLength(false); }
271	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
272	>	public void testGetQueueLength(boolean fair) {
273	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
274		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
275		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
276	<	try {
277	<	assertEquals(0, lock.getQueueLength());
278	<	lock.lock();
279	<	t1.start();
280	<	Thread.sleep(SHORT_DELAY_MS);
281	<	assertEquals(1, lock.getQueueLength());
282	<	t2.start();
283	<	Thread.sleep(SHORT_DELAY_MS);
284	<	assertEquals(2, lock.getQueueLength());
285	<	t1.interrupt();
286	<	Thread.sleep(SHORT_DELAY_MS);
287	<	assertEquals(1, lock.getQueueLength());
288	<	lock.unlock();
289	<	Thread.sleep(SHORT_DELAY_MS);
290	<	assertEquals(0, lock.getQueueLength());
200	<	t1.join();
201	<	t2.join();
202	<	} catch(Exception e){
203	<	unexpectedException();
204	<	}
205	<	}
276	>	assertEquals(0, lock.getQueueLength());
277	>	lock.lock();
278	>	t1.start();
279	>	waitForQueuedThread(lock, t1);
280	>	assertEquals(1, lock.getQueueLength());
281	>	t2.start();
282	>	waitForQueuedThread(lock, t2);
283	>	assertEquals(2, lock.getQueueLength());
284	>	t1.interrupt();
285	>	awaitTermination(t1);
286	>	assertEquals(1, lock.getQueueLength());
287	>	lock.unlock();
288	>	awaitTermination(t2);
289	>	assertEquals(0, lock.getQueueLength());
290	>	}
291
292		/**
293		* hasQueuedThread(null) throws NPE
294		*/
295	<	public void testHasQueuedThreadNPE() {
296	<	final ReentrantLock sync = new ReentrantLock();
295	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
296	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
297	>	public void testHasQueuedThreadNPE(boolean fair) {
298	>	final ReentrantLock lock = new ReentrantLock(fair);
299		try {
300	<	sync.hasQueuedThread(null);
300	>	lock.hasQueuedThread(null);
301		shouldThrow();
302	<	} catch (NullPointerException success) {
216	<	}
302	>	} catch (NullPointerException success) {}
303		}
304
305		/**
306	<	* hasQueuedThread reports whether a thread is queued.
306	>	* hasQueuedThread reports whether a thread is queued
307		*/
308	<	public void testHasQueuedThread() {
309	<	final ReentrantLock sync = new ReentrantLock();
310	<	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
311	<	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
312	<	try {
313	<	assertFalse(sync.hasQueuedThread(t1));
314	<	assertFalse(sync.hasQueuedThread(t2));
315	<	sync.lock();
316	<	t1.start();
317	<	Thread.sleep(SHORT_DELAY_MS);
318	<	assertTrue(sync.hasQueuedThread(t1));
319	<	t2.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	assertTrue(sync.hasQueuedThread(t1));
322	<	assertTrue(sync.hasQueuedThread(t2));
323	<	t1.interrupt();
324	<	Thread.sleep(SHORT_DELAY_MS);
325	<	assertFalse(sync.hasQueuedThread(t1));
326	<	assertTrue(sync.hasQueuedThread(t2));
327	<	sync.unlock();
328	<	Thread.sleep(SHORT_DELAY_MS);
329	<	assertFalse(sync.hasQueuedThread(t1));
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	assertFalse(sync.hasQueuedThread(t2));
332	<	t1.join();
333	<	t2.join();
248	<	} catch(Exception e){
249	<	unexpectedException();
250	<	}
251	<	}
252	<
308	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
309	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
310	>	public void testHasQueuedThread(boolean fair) {
311	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
312	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
313	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
314	>	assertFalse(lock.hasQueuedThread(t1));
315	>	assertFalse(lock.hasQueuedThread(t2));
316	>	lock.lock();
317	>	t1.start();
318	>	waitForQueuedThread(lock, t1);
319	>	assertTrue(lock.hasQueuedThread(t1));
320	>	assertFalse(lock.hasQueuedThread(t2));
321	>	t2.start();
322	>	waitForQueuedThread(lock, t2);
323	>	assertTrue(lock.hasQueuedThread(t1));
324	>	assertTrue(lock.hasQueuedThread(t2));
325	>	t1.interrupt();
326	>	awaitTermination(t1);
327	>	assertFalse(lock.hasQueuedThread(t1));
328	>	assertTrue(lock.hasQueuedThread(t2));
329	>	lock.unlock();
330	>	awaitTermination(t2);
331	>	assertFalse(lock.hasQueuedThread(t1));
332	>	assertFalse(lock.hasQueuedThread(t2));
333	>	}
334
335		/**
336		* getQueuedThreads includes waiting threads
337		*/
338	<	public void testGetQueuedThreads() {
339	<	final PublicReentrantLock lock = new PublicReentrantLock();
338	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
339	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
340	>	public void testGetQueuedThreads(boolean fair) {
341	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
342		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
343		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
344	<	try {
345	<	assertTrue(lock.getQueuedThreads().isEmpty());
346	<	lock.lock();
347	<	assertTrue(lock.getQueuedThreads().isEmpty());
348	<	t1.start();
349	<	Thread.sleep(SHORT_DELAY_MS);
350	<	assertTrue(lock.getQueuedThreads().contains(t1));
351	<	t2.start();
352	<	Thread.sleep(SHORT_DELAY_MS);
353	<	assertTrue(lock.getQueuedThreads().contains(t1));
354	<	assertTrue(lock.getQueuedThreads().contains(t2));
355	<	t1.interrupt();
356	<	Thread.sleep(SHORT_DELAY_MS);
357	<	assertFalse(lock.getQueuedThreads().contains(t1));
358	<	assertTrue(lock.getQueuedThreads().contains(t2));
359	<	lock.unlock();
360	<	Thread.sleep(SHORT_DELAY_MS);
361	<	assertTrue(lock.getQueuedThreads().isEmpty());
362	<	t1.join();
363	<	t2.join();
364	<	} catch(Exception e){
282	<	unexpectedException();
283	<	}
284	<	}
285	<
344	>	assertTrue(lock.getQueuedThreads().isEmpty());
345	>	lock.lock();
346	>	assertTrue(lock.getQueuedThreads().isEmpty());
347	>	t1.start();
348	>	waitForQueuedThread(lock, t1);
349	>	assertEquals(1, lock.getQueuedThreads().size());
350	>	assertTrue(lock.getQueuedThreads().contains(t1));
351	>	t2.start();
352	>	waitForQueuedThread(lock, t2);
353	>	assertEquals(2, lock.getQueuedThreads().size());
354	>	assertTrue(lock.getQueuedThreads().contains(t1));
355	>	assertTrue(lock.getQueuedThreads().contains(t2));
356	>	t1.interrupt();
357	>	awaitTermination(t1);
358	>	assertFalse(lock.getQueuedThreads().contains(t1));
359	>	assertTrue(lock.getQueuedThreads().contains(t2));
360	>	assertEquals(1, lock.getQueuedThreads().size());
361	>	lock.unlock();
362	>	awaitTermination(t2);
363	>	assertTrue(lock.getQueuedThreads().isEmpty());
364	>	}
365
366		/**
367	<	* timed tryLock is interruptible.
368	<	*/
369	<	public void testInterruptedException2() {
370	<	final ReentrantLock lock = new ReentrantLock();
371	<	lock.lock();
372	<	Thread t = new Thread(new Runnable() {
373	<	public void run() {
374	<	try {
375	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
376	<	threadShouldThrow();
377	<	} catch(InterruptedException success){}
299	<	}
300	<	});
301	<	try {
302	<	t.start();
303	<	t.interrupt();
304	<	} catch(Exception e){
305	<	unexpectedException();
306	<	}
307	<	}
367	>	* timed tryLock is interruptible
368	>	*/
369	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
370	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
371	>	public void testTryLock_Interruptible(boolean fair) {
372	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
373	>	lock.lock();
374	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
375	>	public void realRun() throws InterruptedException {
376	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
377	>	}});
378
379	+	waitForQueuedThread(lock, t);
380	+	t.interrupt();
381	+	awaitTermination(t);
382	+	releaseLock(lock);
383	+	}
384
385		/**
386	<	* TryLock on a locked lock fails
386	>	* tryLock on a locked lock fails
387		*/
388	<	public void testTryLockWhenLocked() {
389	<	final ReentrantLock lock = new ReentrantLock();
390	<	lock.lock();
391	<	Thread t = new Thread(new Runnable() {
392	<	public void run() {
393	<	threadAssertFalse(lock.tryLock());
394	<	}
395	<	});
396	<	try {
397	<	t.start();
398	<	t.join();
399	<	lock.unlock();
400	<	} catch(Exception e){
326	<	unexpectedException();
327	<	}
328	<	}
388	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
389	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
390	>	public void testTryLockWhenLocked(boolean fair) {
391	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
392	>	lock.lock();
393	>	Thread t = newStartedThread(new CheckedRunnable() {
394	>	public void realRun() {
395	>	assertFalse(lock.tryLock());
396	>	}});
397	>
398	>	awaitTermination(t);
399	>	releaseLock(lock);
400	>	}
401
402		/**
403		* Timed tryLock on a locked lock times out
404		*/
405	<	public void testTryLock_Timeout() {
406	<	final ReentrantLock lock = new ReentrantLock();
407	<	lock.lock();
408	<	Thread t = new Thread(new Runnable() {
409	<	public void run() {
410	<	try {
411	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
412	<	} catch (Exception ex) {
413	<	threadUnexpectedException();
414	<	}
415	<	}
416	<	});
417	<	try {
418	<	t.start();
419	<	t.join();
348	<	lock.unlock();
349	<	} catch(Exception e){
350	<	unexpectedException();
351	<	}
352	<	}
353	<
354	<	/**
355	<	* getHoldCount returns number of recursive holds
356	<	*/
357	<	public void testGetHoldCount() {
358	<	ReentrantLock lock = new ReentrantLock();
359	<	for(int i = 1; i <= SIZE; i++) {
360	<	lock.lock();
361	<	assertEquals(i,lock.getHoldCount());
362	<	}
363	<	for(int i = SIZE; i > 0; i--) {
364	<	lock.unlock();
365	<	assertEquals(i-1,lock.getHoldCount());
366	<	}
405	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
406	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
407	>	public void testTryLock_Timeout(boolean fair) {
408	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
409	>	final long timeoutMillis = timeoutMillis();
410	>	lock.lock();
411	>	Thread t = newStartedThread(new CheckedRunnable() {
412	>	public void realRun() throws InterruptedException {
413	>	long startTime = System.nanoTime();
414	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
415	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
416	>	}});
417	>
418	>	awaitTermination(t);
419	>	releaseLock(lock);
420		}
421	<
369	<
421	>
422		/**
423	<	* isLocked is true when locked and false when not
423	>	* getHoldCount returns number of recursive holds
424		*/
425	<	public void testIsLocked() {
426	<	final ReentrantLock lock = new ReentrantLock();
427	<	lock.lock();
428	<	assertTrue(lock.isLocked());
429	<	lock.unlock();
430	<	assertFalse(lock.isLocked());
431	<	Thread t = new Thread(new Runnable() {
432	<	public void run() {
433	<	lock.lock();
434	<	try {
435	<	Thread.sleep(SMALL_DELAY_MS);
384	<	}
385	<	catch(Exception e) {
386	<	threadUnexpectedException();
387	<	}
388	<	lock.unlock();
389	<	}
390	<	});
391	<	try {
392	<	t.start();
393	<	Thread.sleep(SHORT_DELAY_MS);
394	<	assertTrue(lock.isLocked());
395	<	t.join();
396	<	assertFalse(lock.isLocked());
397	<	} catch(Exception e){
398	<	unexpectedException();
425	>	public void testGetHoldCount()      { testGetHoldCount(false); }
426	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
427	>	public void testGetHoldCount(boolean fair) {
428	>	final ReentrantLock lock = new ReentrantLock(fair);
429	>	for (int i = 1; i <= SIZE; i++) {
430	>	lock.lock();
431	>	assertEquals(i, lock.getHoldCount());
432	>	}
433	>	for (int i = SIZE; i > 0; i--) {
434	>	lock.unlock();
435	>	assertEquals(i - 1, lock.getHoldCount());
436		}
437		}
438
402	–
439		/**
440	<	* lockInterruptibly is interruptible.
440	>	* isLocked is true when locked and false when not
441		*/
442	<	public void testLockInterruptibly1() {
443	<	final ReentrantLock lock = new ReentrantLock();
444	<	lock.lock();
445	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
442	>	public void testIsLocked()      { testIsLocked(false); }
443	>	public void testIsLocked_fair() { testIsLocked(true); }
444	>	public void testIsLocked(boolean fair) {
445	>	final ReentrantLock lock = new ReentrantLock(fair);
446		try {
447	<	t.start();
448	<	Thread.sleep(SHORT_DELAY_MS);
449	<	t.interrupt();
447	>	assertFalse(lock.isLocked());
448	>	lock.lock();
449	>	assertTrue(lock.isLocked());
450	>	lock.lock();
451	>	assertTrue(lock.isLocked());
452		lock.unlock();
453	<	t.join();
454	<	} catch(Exception e){
455	<	unexpectedException();
456	<	}
457	<	}
453	>	assertTrue(lock.isLocked());
454	>	lock.unlock();
455	>	assertFalse(lock.isLocked());
456	>	final CyclicBarrier barrier = new CyclicBarrier(2);
457	>	Thread t = newStartedThread(new CheckedRunnable() {
458	>	public void realRun() throws Exception {
459	>	lock.lock();
460	>	assertTrue(lock.isLocked());
461	>	barrier.await();
462	>	barrier.await();
463	>	lock.unlock();
464	>	}});
465	>
466	>	barrier.await();
467	>	assertTrue(lock.isLocked());
468	>	barrier.await();
469	>	awaitTermination(t);
470	>	assertFalse(lock.isLocked());
471	>	} catch (Exception fail) { threadUnexpectedException(fail); }
472	>	}
473
474		/**
475		* lockInterruptibly succeeds when unlocked, else is interruptible
476		*/
477	<	public void testLockInterruptibly2() {
478	<	final ReentrantLock lock = new ReentrantLock();
479	<	try {
480	<	lock.lockInterruptibly();
428	<	} catch(Exception e) {
429	<	unexpectedException();
430	<	}
431	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
477	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
478	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
479	>	public void testLockInterruptibly(boolean fair) {
480	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
481		try {
482	<	t.start();
483	<	t.interrupt();
484	<	assertTrue(lock.isLocked());
485	<	assertTrue(lock.isHeldByCurrentThread());
486	<	t.join();
487	<	} catch(Exception e){
488	<	unexpectedException();
489	<	}
482	>	lock.lockInterruptibly();
483	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
484	>	assertLockedByMoi(lock);
485	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
486	>	waitForQueuedThread(lock, t);
487	>	t.interrupt();
488	>	assertTrue(lock.isLocked());
489	>	assertTrue(lock.isHeldByCurrentThread());
490	>	awaitTermination(t);
491	>	releaseLock(lock);
492		}
493
494		/**
495		* Calling await without holding lock throws IllegalMonitorStateException
496		*/
497	<	public void testAwait_IllegalMonitor() {
498	<	final ReentrantLock lock = new ReentrantLock();
497	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
498	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
499	>	public void testAwait_IMSE(boolean fair) {
500	>	final ReentrantLock lock = new ReentrantLock(fair);
501		final Condition c = lock.newCondition();
502	<	try {
503	<	c.await();
504	<	shouldThrow();
505	<	}
506	<	catch (IllegalMonitorStateException success) {
507	<	}
508	<	catch (Exception ex) {
509	<	unexpectedException();
502	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
503	>	long startTime = System.nanoTime();
504	>	try {
505	>	await(c, awaitMethod);
506	>	shouldThrow();
507	>	} catch (IllegalMonitorStateException success) {
508	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
509	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
510		}
511		}
512
513		/**
514		* Calling signal without holding lock throws IllegalMonitorStateException
515		*/
516	<	public void testSignal_IllegalMonitor() {
517	<	final ReentrantLock lock = new ReentrantLock();
516	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
517	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
518	>	public void testSignal_IMSE(boolean fair) {
519	>	final ReentrantLock lock = new ReentrantLock(fair);
520		final Condition c = lock.newCondition();
521		try {
522		c.signal();
523		shouldThrow();
524	<	}
470	<	catch (IllegalMonitorStateException success) {
471	<	}
472	<	catch (Exception ex) {
473	<	unexpectedException();
474	<	}
524	>	} catch (IllegalMonitorStateException success) {}
525		}
526
527		/**
528		* awaitNanos without a signal times out
529		*/
530	<	public void testAwaitNanos_Timeout() {
531	<	final ReentrantLock lock = new ReentrantLock();
530	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
531	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
532	>	public void testAwaitNanos_Timeout(boolean fair) {
533	>	final ReentrantLock lock = new ReentrantLock(fair);
534		final Condition c = lock.newCondition();
535	+	final long timeoutMillis = timeoutMillis();
536	+	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
537	+	lock.lock();
538	+	final long startTime = System.nanoTime();
539		try {
540	<	lock.lock();
541	<	long t = c.awaitNanos(100);
542	<	assertTrue(t <= 0);
543	<	lock.unlock();
544	<	}
489	<	catch (Exception ex) {
490	<	unexpectedException();
491	<	}
540	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
541	>	assertTrue(nanosRemaining <= 0);
542	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
543	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
544	>	lock.unlock();
545		}
546
547		/**
548	<	*  timed await without a signal times out
548	>	* timed await without a signal times out
549		*/
550	<	public void testAwait_Timeout() {
551	<	final ReentrantLock lock = new ReentrantLock();
550	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
551	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
552	>	public void testAwait_Timeout(boolean fair) {
553	>	final ReentrantLock lock = new ReentrantLock(fair);
554		final Condition c = lock.newCondition();
555	+	final long timeoutMillis = timeoutMillis();
556	+	lock.lock();
557	+	final long startTime = System.nanoTime();
558		try {
559	<	lock.lock();
560	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
561	<	lock.unlock();
562	<	}
505	<	catch (Exception ex) {
506	<	unexpectedException();
507	<	}
559	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
560	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
561	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
562	>	lock.unlock();
563		}
564
565		/**
566		* awaitUntil without a signal times out
567		*/
568	<	public void testAwaitUntil_Timeout() {
569	<	final ReentrantLock lock = new ReentrantLock();
568	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
569	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
570	>	public void testAwaitUntil_Timeout(boolean fair) {
571	>	final ReentrantLock lock = new ReentrantLock(fair);
572		final Condition c = lock.newCondition();
573	<	try {
574	<	lock.lock();
575	<	java.util.Date d = new java.util.Date();
576	<	c.awaitUntil(new java.util.Date(d.getTime() + 10));
577	<	lock.unlock();
578	<	}
579	<	catch (Exception ex) {
580	<	unexpectedException();
581	<	}
573	>	lock.lock();
574	>	// We shouldn't assume that nanoTime and currentTimeMillis
575	>	// use the same time source, so don't use nanoTime here.
576	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
577	>	try {
578	>	assertFalse(c.awaitUntil(delayedDate));
579	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
580	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
581	>	lock.unlock();
582		}
583
584		/**
585		* await returns when signalled
586		*/
587	<	public void testAwait() {
588	<	final ReentrantLock lock = new ReentrantLock();
587	>	public void testAwait()      { testAwait(false); }
588	>	public void testAwait_fair() { testAwait(true); }
589	>	public void testAwait(boolean fair) {
590	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
591		final Condition c = lock.newCondition();
592	<	Thread t = new Thread(new Runnable() {
593	<	public void run() {
594	<	try {
595	<	lock.lock();
596	<	c.await();
597	<	lock.unlock();
598	<	}
599	<	catch(InterruptedException e) {
541	<	threadUnexpectedException();
542	<	}
543	<	}
544	<	});
592	>	final CountDownLatch locked = new CountDownLatch(1);
593	>	Thread t = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	lock.lock();
596	>	locked.countDown();
597	>	c.await();
598	>	lock.unlock();
599	>	}});
600
601	<	try {
602	<	t.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	lock.lock();
605	<	c.signal();
606	<	lock.unlock();
607	<	t.join(SHORT_DELAY_MS);
608	<	assertFalse(t.isAlive());
554	<	}
555	<	catch (Exception ex) {
556	<	unexpectedException();
557	<	}
601	>	await(locked);
602	>	lock.lock();
603	>	assertHasWaiters(lock, c, t);
604	>	c.signal();
605	>	assertHasNoWaiters(lock, c);
606	>	assertTrue(t.isAlive());
607	>	lock.unlock();
608	>	awaitTermination(t);
609		}
610
611		/**
612		* hasWaiters throws NPE if null
613		*/
614	<	public void testHasWaitersNPE() {
615	<	final ReentrantLock lock = new ReentrantLock();
614	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
615	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
616	>	public void testHasWaitersNPE(boolean fair) {
617	>	final ReentrantLock lock = new ReentrantLock(fair);
618		try {
619		lock.hasWaiters(null);
620		shouldThrow();
621	<	} catch (NullPointerException success) {
569	<	} catch (Exception ex) {
570	<	unexpectedException();
571	<	}
621	>	} catch (NullPointerException success) {}
622		}
623
624		/**
625		* getWaitQueueLength throws NPE if null
626		*/
627	<	public void testGetWaitQueueLengthNPE() {
628	<	final ReentrantLock lock = new ReentrantLock();
627	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
628	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
629	>	public void testGetWaitQueueLengthNPE(boolean fair) {
630	>	final ReentrantLock lock = new ReentrantLock(fair);
631		try {
632		lock.getWaitQueueLength(null);
633		shouldThrow();
634	<	} catch (NullPointerException success) {
583	<	} catch (Exception ex) {
584	<	unexpectedException();
585	<	}
634	>	} catch (NullPointerException success) {}
635		}
636
588	–
637		/**
638		* getWaitingThreads throws NPE if null
639		*/
640	<	public void testGetWaitingThreadsNPE() {
641	<	final PublicReentrantLock lock = new PublicReentrantLock();
640	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
641	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
642	>	public void testGetWaitingThreadsNPE(boolean fair) {
643	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
644		try {
645		lock.getWaitingThreads(null);
646		shouldThrow();
647	<	} catch (NullPointerException success) {
598	<	} catch (Exception ex) {
599	<	unexpectedException();
600	<	}
647	>	} catch (NullPointerException success) {}
648		}
649
603	–
650		/**
651	<	* hasWaiters throws IAE if not owned
651	>	* hasWaiters throws IllegalArgumentException if not owned
652		*/
653	<	public void testHasWaitersIAE() {
654	<	final ReentrantLock lock = new ReentrantLock();
655	<	final Condition c = (lock.newCondition());
656	<	final ReentrantLock lock2 = new ReentrantLock();
653	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
654	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
655	>	public void testHasWaitersIAE(boolean fair) {
656	>	final ReentrantLock lock = new ReentrantLock(fair);
657	>	final Condition c = lock.newCondition();
658	>	final ReentrantLock lock2 = new ReentrantLock(fair);
659		try {
660		lock2.hasWaiters(c);
661		shouldThrow();
662	<	} catch (IllegalArgumentException success) {
615	<	} catch (Exception ex) {
616	<	unexpectedException();
617	<	}
662	>	} catch (IllegalArgumentException success) {}
663		}
664
665		/**
666	<	* hasWaiters throws IMSE if not locked
666	>	* hasWaiters throws IllegalMonitorStateException if not locked
667		*/
668	<	public void testHasWaitersIMSE() {
669	<	final ReentrantLock lock = new ReentrantLock();
670	<	final Condition c = (lock.newCondition());
668	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
669	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
670	>	public void testHasWaitersIMSE(boolean fair) {
671	>	final ReentrantLock lock = new ReentrantLock(fair);
672	>	final Condition c = lock.newCondition();
673		try {
674		lock.hasWaiters(c);
675		shouldThrow();
676	<	} catch (IllegalMonitorStateException success) {
630	<	} catch (Exception ex) {
631	<	unexpectedException();
632	<	}
676	>	} catch (IllegalMonitorStateException success) {}
677		}
678
635	–
679		/**
680	<	* getWaitQueueLength throws IAE if not owned
680	>	* getWaitQueueLength throws IllegalArgumentException if not owned
681		*/
682	<	public void testGetWaitQueueLengthIAE() {
683	<	final ReentrantLock lock = new ReentrantLock();
684	<	final Condition c = (lock.newCondition());
685	<	final ReentrantLock lock2 = new ReentrantLock();
682	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
683	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
684	>	public void testGetWaitQueueLengthIAE(boolean fair) {
685	>	final ReentrantLock lock = new ReentrantLock(fair);
686	>	final Condition c = lock.newCondition();
687	>	final ReentrantLock lock2 = new ReentrantLock(fair);
688		try {
689		lock2.getWaitQueueLength(c);
690		shouldThrow();
691	<	} catch (IllegalArgumentException success) {
647	<	} catch (Exception ex) {
648	<	unexpectedException();
649	<	}
691	>	} catch (IllegalArgumentException success) {}
692		}
693
694		/**
695	<	* getWaitQueueLength throws IMSE if not locked
695	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
696		*/
697	<	public void testGetWaitQueueLengthIMSE() {
698	<	final ReentrantLock lock = new ReentrantLock();
699	<	final Condition c = (lock.newCondition());
697	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
698	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
699	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
700	>	final ReentrantLock lock = new ReentrantLock(fair);
701	>	final Condition c = lock.newCondition();
702		try {
703		lock.getWaitQueueLength(c);
704		shouldThrow();
705	<	} catch (IllegalMonitorStateException success) {
662	<	} catch (Exception ex) {
663	<	unexpectedException();
664	<	}
705	>	} catch (IllegalMonitorStateException success) {}
706		}
707
667	–
708		/**
709	<	* getWaitingThreads throws IAE if not owned
709	>	* getWaitingThreads throws IllegalArgumentException if not owned
710		*/
711	<	public void testGetWaitingThreadsIAE() {
712	<	final PublicReentrantLock lock = new PublicReentrantLock();
713	<	final Condition c = (lock.newCondition());
714	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
711	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
712	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
713	>	public void testGetWaitingThreadsIAE(boolean fair) {
714	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
715	>	final Condition c = lock.newCondition();
716	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
717		try {
718		lock2.getWaitingThreads(c);
719		shouldThrow();
720	<	} catch (IllegalArgumentException success) {
679	<	} catch (Exception ex) {
680	<	unexpectedException();
681	<	}
720	>	} catch (IllegalArgumentException success) {}
721		}
722
723		/**
724	<	* getWaitingThreads throws IMSE if not locked
724	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
725		*/
726	<	public void testGetWaitingThreadsIMSE() {
727	<	final PublicReentrantLock lock = new PublicReentrantLock();
728	<	final Condition c = (lock.newCondition());
726	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
727	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
728	>	public void testGetWaitingThreadsIMSE(boolean fair) {
729	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
730	>	final Condition c = lock.newCondition();
731		try {
732		lock.getWaitingThreads(c);
733		shouldThrow();
734	<	} catch (IllegalMonitorStateException success) {
694	<	} catch (Exception ex) {
695	<	unexpectedException();
696	<	}
734	>	} catch (IllegalMonitorStateException success) {}
735		}
736
699	–
700	–
737		/**
738		* hasWaiters returns true when a thread is waiting, else false
739		*/
740	<	public void testHasWaiters() {
741	<	final ReentrantLock lock = new ReentrantLock();
740	>	public void testHasWaiters()      { testHasWaiters(false); }
741	>	public void testHasWaiters_fair() { testHasWaiters(true); }
742	>	public void testHasWaiters(boolean fair) {
743	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
744		final Condition c = lock.newCondition();
745	<	Thread t = new Thread(new Runnable() {
746	<	public void run() {
747	<	try {
748	<	lock.lock();
749	<	threadAssertFalse(lock.hasWaiters(c));
750	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
751	<	c.await();
752	<	lock.unlock();
753	<	}
754	<	catch(InterruptedException e) {
755	<	threadUnexpectedException();
756	<	}
719	<	}
720	<	});
745	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
746	>	Thread t = newStartedThread(new CheckedRunnable() {
747	>	public void realRun() throws InterruptedException {
748	>	lock.lock();
749	>	assertHasNoWaiters(lock, c);
750	>	assertFalse(lock.hasWaiters(c));
751	>	pleaseSignal.countDown();
752	>	c.await();
753	>	assertHasNoWaiters(lock, c);
754	>	assertFalse(lock.hasWaiters(c));
755	>	lock.unlock();
756	>	}});
757
758	<	try {
759	<	t.start();
760	<	Thread.sleep(SHORT_DELAY_MS);
761	<	lock.lock();
762	<	assertTrue(lock.hasWaiters(c));
763	<	assertEquals(1, lock.getWaitQueueLength(c));
764	<	c.signal();
765	<	lock.unlock();
766	<	Thread.sleep(SHORT_DELAY_MS);
767	<	lock.lock();
732	<	assertFalse(lock.hasWaiters(c));
733	<	assertEquals(0, lock.getWaitQueueLength(c));
734	<	lock.unlock();
735	<	t.join(SHORT_DELAY_MS);
736	<	assertFalse(t.isAlive());
737	<	}
738	<	catch (Exception ex) {
739	<	unexpectedException();
740	<	}
758	>	await(pleaseSignal);
759	>	lock.lock();
760	>	assertHasWaiters(lock, c, t);
761	>	assertTrue(lock.hasWaiters(c));
762	>	c.signal();
763	>	assertHasNoWaiters(lock, c);
764	>	assertFalse(lock.hasWaiters(c));
765	>	lock.unlock();
766	>	awaitTermination(t);
767	>	assertHasNoWaiters(lock, c);
768		}
769
770		/**
771		* getWaitQueueLength returns number of waiting threads
772		*/
773	<	public void testGetWaitQueueLength() {
774	<	final ReentrantLock lock = new ReentrantLock();
773	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
774	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
775	>	public void testGetWaitQueueLength(boolean fair) {
776	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
777		final Condition c = lock.newCondition();
778	<	Thread t1 = new Thread(new Runnable() {
779	<	public void run() {
780	<	try {
781	<	lock.lock();
782	<	threadAssertFalse(lock.hasWaiters(c));
783	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
784	<	c.await();
785	<	lock.unlock();
786	<	}
787	<	catch(InterruptedException e) {
788	<	threadUnexpectedException();
760	<	}
761	<	}
762	<	});
763	<
764	<	Thread t2 = new Thread(new Runnable() {
765	<	public void run() {
766	<	try {
767	<	lock.lock();
768	<	threadAssertTrue(lock.hasWaiters(c));
769	<	threadAssertEquals(1, lock.getWaitQueueLength(c));
770	<	c.await();
771	<	lock.unlock();
772	<	}
773	<	catch(InterruptedException e) {
774	<	threadUnexpectedException();
775	<	}
776	<	}
777	<	});
778	>	final CountDownLatch locked1 = new CountDownLatch(1);
779	>	final CountDownLatch locked2 = new CountDownLatch(1);
780	>	Thread t1 = new Thread(new CheckedRunnable() {
781	>	public void realRun() throws InterruptedException {
782	>	lock.lock();
783	>	assertFalse(lock.hasWaiters(c));
784	>	assertEquals(0, lock.getWaitQueueLength(c));
785	>	locked1.countDown();
786	>	c.await();
787	>	lock.unlock();
788	>	}});
789
790	<	try {
791	<	t1.start();
792	<	Thread.sleep(SHORT_DELAY_MS);
793	<	t2.start();
794	<	Thread.sleep(SHORT_DELAY_MS);
795	<	lock.lock();
796	<	assertTrue(lock.hasWaiters(c));
797	<	assertEquals(2, lock.getWaitQueueLength(c));
798	<	c.signalAll();
799	<	lock.unlock();
800	<	Thread.sleep(SHORT_DELAY_MS);
801	<	lock.lock();
802	<	assertFalse(lock.hasWaiters(c));
803	<	assertEquals(0, lock.getWaitQueueLength(c));
804	<	lock.unlock();
805	<	t1.join(SHORT_DELAY_MS);
806	<	t2.join(SHORT_DELAY_MS);
807	<	assertFalse(t1.isAlive());
808	<	assertFalse(t2.isAlive());
809	<	}
810	<	catch (Exception ex) {
811	<	unexpectedException();
812	<	}
790	>	Thread t2 = new Thread(new CheckedRunnable() {
791	>	public void realRun() throws InterruptedException {
792	>	lock.lock();
793	>	assertTrue(lock.hasWaiters(c));
794	>	assertEquals(1, lock.getWaitQueueLength(c));
795	>	locked2.countDown();
796	>	c.await();
797	>	lock.unlock();
798	>	}});
799	>
800	>	lock.lock();
801	>	assertEquals(0, lock.getWaitQueueLength(c));
802	>	lock.unlock();
803	>
804	>	t1.start();
805	>	await(locked1);
806	>
807	>	lock.lock();
808	>	assertHasWaiters(lock, c, t1);
809	>	assertEquals(1, lock.getWaitQueueLength(c));
810	>	lock.unlock();
811	>
812	>	t2.start();
813	>	await(locked2);
814	>
815	>	lock.lock();
816	>	assertHasWaiters(lock, c, t1, t2);
817	>	assertEquals(2, lock.getWaitQueueLength(c));
818	>	c.signalAll();
819	>	assertHasNoWaiters(lock, c);
820	>	lock.unlock();
821	>
822	>	awaitTermination(t1);
823	>	awaitTermination(t2);
824	>
825	>	assertHasNoWaiters(lock, c);
826		}
827
828		/**
829		* getWaitingThreads returns only and all waiting threads
830		*/
831	<	public void testGetWaitingThreads() {
832	<	final PublicReentrantLock lock = new PublicReentrantLock();
831	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
832	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
833	>	public void testGetWaitingThreads(boolean fair) {
834	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
835		final Condition c = lock.newCondition();
836	<	Thread t1 = new Thread(new Runnable() {
837	<	public void run() {
838	<	try {
839	<	lock.lock();
840	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
841	<	c.await();
842	<	lock.unlock();
843	<	}
844	<	catch(InterruptedException e) {
845	<	threadUnexpectedException();
820	<	}
821	<	}
822	<	});
823	<
824	<	Thread t2 = new Thread(new Runnable() {
825	<	public void run() {
826	<	try {
827	<	lock.lock();
828	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
829	<	c.await();
830	<	lock.unlock();
831	<	}
832	<	catch(InterruptedException e) {
833	<	threadUnexpectedException();
834	<	}
835	<	}
836	<	});
836	>	final CountDownLatch locked1 = new CountDownLatch(1);
837	>	final CountDownLatch locked2 = new CountDownLatch(1);
838	>	Thread t1 = new Thread(new CheckedRunnable() {
839	>	public void realRun() throws InterruptedException {
840	>	lock.lock();
841	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
842	>	locked1.countDown();
843	>	c.await();
844	>	lock.unlock();
845	>	}});
846
847	<	try {
848	<	lock.lock();
849	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
850	<	lock.unlock();
851	<	t1.start();
852	<	Thread.sleep(SHORT_DELAY_MS);
853	<	t2.start();
854	<	Thread.sleep(SHORT_DELAY_MS);
846	<	lock.lock();
847	<	assertTrue(lock.hasWaiters(c));
848	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
849	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
850	<	c.signalAll();
851	<	lock.unlock();
852	<	Thread.sleep(SHORT_DELAY_MS);
853	<	lock.lock();
854	<	assertFalse(lock.hasWaiters(c));
855	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
856	<	lock.unlock();
857	<	t1.join(SHORT_DELAY_MS);
858	<	t2.join(SHORT_DELAY_MS);
859	<	assertFalse(t1.isAlive());
860	<	assertFalse(t2.isAlive());
861	<	}
862	<	catch (Exception ex) {
863	<	unexpectedException();
864	<	}
865	<	}
847	>	Thread t2 = new Thread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.lock();
850	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
851	>	locked2.countDown();
852	>	c.await();
853	>	lock.unlock();
854	>	}});
855
856	<	/** A helper class for uninterruptible wait tests */
857	<	class UninterruptableThread extends Thread {
858	<	private ReentrantLock lock;
859	<	private Condition c;
860	<
861	<	public volatile boolean canAwake = false;
862	<	public volatile boolean interrupted = false;
863	<	public volatile boolean lockStarted = false;
864	<
865	<	public UninterruptableThread(ReentrantLock lock, Condition c) {
866	<	this.lock = lock;
867	<	this.c = c;
868	<	}
869	<
870	<	public synchronized void run() {
871	<	lock.lock();
872	<	lockStarted = true;
873	<
874	<	while (!canAwake) {
875	<	c.awaitUninterruptibly();
876	<	}
877	<
878	<	interrupted = isInterrupted();
879	<	lock.unlock();
880	<	}
856	>	lock.lock();
857	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
858	>	lock.unlock();
859	>
860	>	t1.start();
861	>	await(locked1);
862	>
863	>	lock.lock();
864	>	assertHasWaiters(lock, c, t1);
865	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
866	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
867	>	assertEquals(1, lock.getWaitingThreads(c).size());
868	>	lock.unlock();
869	>
870	>	t2.start();
871	>	await(locked2);
872	>
873	>	lock.lock();
874	>	assertHasWaiters(lock, c, t1, t2);
875	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
876	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
877	>	assertEquals(2, lock.getWaitingThreads(c).size());
878	>	c.signalAll();
879	>	assertHasNoWaiters(lock, c);
880	>	lock.unlock();
881	>
882	>	awaitTermination(t1);
883	>	awaitTermination(t2);
884	>
885	>	assertHasNoWaiters(lock, c);
886		}
887
888		/**
889	<	* awaitUninterruptibly doesn't abort on interrupt
890	<	*/
891	<	public void testAwaitUninterruptibly() {
892	<	final ReentrantLock lock = new ReentrantLock();
893	<	final Condition c = lock.newCondition();
894	<	UninterruptableThread thread = new UninterruptableThread(lock, c);
889	>	* awaitUninterruptibly is uninterruptible
890	>	*/
891	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
892	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
893	>	public void testAwaitUninterruptibly(boolean fair) {
894	>	final ReentrantLock lock = new ReentrantLock(fair);
895	>	final Condition condition = lock.newCondition();
896	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
897	>
898	>	Thread t1 = newStartedThread(new CheckedRunnable() {
899	>	public void realRun() {
900	>	// Interrupt before awaitUninterruptibly
901	>	lock.lock();
902	>	pleaseInterrupt.countDown();
903	>	Thread.currentThread().interrupt();
904	>	condition.awaitUninterruptibly();
905	>	assertTrue(Thread.interrupted());
906	>	lock.unlock();
907	>	}});
908
909	<	try {
910	<	thread.start();
909	>	Thread t2 = newStartedThread(new CheckedRunnable() {
910	>	public void realRun() {
911	>	// Interrupt during awaitUninterruptibly
912	>	lock.lock();
913	>	pleaseInterrupt.countDown();
914	>	condition.awaitUninterruptibly();
915	>	assertTrue(Thread.interrupted());
916	>	lock.unlock();
917	>	}});
918
919	<	while (!thread.lockStarted) {
920	<	Thread.sleep(100);
921	<	}
919	>	await(pleaseInterrupt);
920	>	t2.interrupt();
921	>	lock.lock();
922	>	lock.unlock();
923	>	assertThreadBlocks(t1, Thread.State.WAITING);
924	>	assertThreadBlocks(t2, Thread.State.WAITING);
925
926	<	lock.lock();
927	<	try {
928	<	thread.interrupt();
912	<	thread.canAwake = true;
913	<	c.signal();
914	<	} finally {
915	<	lock.unlock();
916	<	}
926	>	lock.lock();
927	>	condition.signalAll();
928	>	lock.unlock();
929
930	<	thread.join();
931	<	assertTrue(thread.interrupted);
920	<	assertFalse(thread.isAlive());
921	<	} catch (Exception ex) {
922	<	unexpectedException();
923	<	}
930	>	awaitTermination(t1);
931	>	awaitTermination(t2);
932		}
933
934		/**
935	<	* await is interruptible
936	<	*/
937	<	public void testAwait_Interrupt() {
938	<	final ReentrantLock lock = new ReentrantLock();
935	>	* await/awaitNanos/awaitUntil is interruptible
936	>	*/
937	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
938	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
939	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
940	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
941	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
942	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
943	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
944	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
945	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
946	>	final PublicReentrantLock lock =
947	>	new PublicReentrantLock(fair);
948		final Condition c = lock.newCondition();
949	<	Thread t = new Thread(new Runnable() {
950	<	public void run() {
951	<	try {
952	<	lock.lock();
953	<	c.await();
954	<	lock.unlock();
955	<	threadShouldThrow();
956	<	}
957	<	catch(InterruptedException success) {
958	<	}
959	<	}
960	<	});
961	<
962	<	try {
963	<	t.start();
964	<	Thread.sleep(SHORT_DELAY_MS);
965	<	t.interrupt();
966	<	t.join(SHORT_DELAY_MS);
967	<	assertFalse(t.isAlive());
968	<	}
969	<	catch (Exception ex) {
970	<	unexpectedException();
954	<	}
949	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
950	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
951	>	public void realRun() throws InterruptedException {
952	>	lock.lock();
953	>	assertLockedByMoi(lock);
954	>	assertHasNoWaiters(lock, c);
955	>	pleaseInterrupt.countDown();
956	>	try {
957	>	await(c, awaitMethod);
958	>	} finally {
959	>	assertLockedByMoi(lock);
960	>	assertHasNoWaiters(lock, c);
961	>	lock.unlock();
962	>	assertFalse(Thread.interrupted());
963	>	}
964	>	}});
965	>
966	>	await(pleaseInterrupt);
967	>	assertHasWaiters(lock, c, t);
968	>	t.interrupt();
969	>	awaitTermination(t);
970	>	assertNotLocked(lock);
971		}
972
973		/**
974	<	* awaitNanos is interruptible
974	>	* signalAll wakes up all threads
975		*/
976	<	public void testAwaitNanos_Interrupt() {
977	<	final ReentrantLock lock = new ReentrantLock();
976	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
977	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
978	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
979	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
980	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
981	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
982	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
983	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
984	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
985	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
986		final Condition c = lock.newCondition();
987	<	Thread t = new Thread(new Runnable() {
988	<	public void run() {
989	<	try {
990	<	lock.lock();
991	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
992	<	lock.unlock();
993	<	threadShouldThrow();
994	<	}
971	<	catch(InterruptedException success) {
972	<	}
973	<	}
974	<	});
975	<
976	<	try {
977	<	t.start();
978	<	Thread.sleep(SHORT_DELAY_MS);
979	<	t.interrupt();
980	<	t.join(SHORT_DELAY_MS);
981	<	assertFalse(t.isAlive());
982	<	}
983	<	catch (Exception ex) {
984	<	unexpectedException();
987	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
988	>	class Awaiter extends CheckedRunnable {
989	>	public void realRun() throws InterruptedException {
990	>	lock.lock();
991	>	pleaseSignal.countDown();
992	>	await(c, awaitMethod);
993	>	lock.unlock();
994	>	}
995		}
986	–	}
996
997	<	/**
998	<	* awaitUntil is interruptible
990	<	*/
991	<	public void testAwaitUntil_Interrupt() {
992	<	final ReentrantLock lock = new ReentrantLock();
993	<	final Condition c = lock.newCondition();
994	<	Thread t = new Thread(new Runnable() {
995	<	public void run() {
996	<	try {
997	<	lock.lock();
998	<	java.util.Date d = new java.util.Date();
999	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1000	<	lock.unlock();
1001	<	threadShouldThrow();
1002	<	}
1003	<	catch(InterruptedException success) {
1004	<	}
1005	<	}
1006	<	});
997	>	Thread t1 = newStartedThread(new Awaiter());
998	>	Thread t2 = newStartedThread(new Awaiter());
999
1000	<	try {
1001	<	t.start();
1002	<	Thread.sleep(SHORT_DELAY_MS);
1003	<	t.interrupt();
1004	<	t.join(SHORT_DELAY_MS);
1005	<	assertFalse(t.isAlive());
1006	<	}
1007	<	catch (Exception ex) {
1016	<	unexpectedException();
1017	<	}
1000	>	await(pleaseSignal);
1001	>	lock.lock();
1002	>	assertHasWaiters(lock, c, t1, t2);
1003	>	c.signalAll();
1004	>	assertHasNoWaiters(lock, c);
1005	>	lock.unlock();
1006	>	awaitTermination(t1);
1007	>	awaitTermination(t2);
1008		}
1009
1010		/**
1011	<	* signalAll wakes up all threads
1012	<	*/
1013	<	public void testSignalAll() {
1014	<	final ReentrantLock lock = new ReentrantLock();
1011	>	* signal wakes up waiting threads in FIFO order
1012	>	*/
1013	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1014	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1015	>	public void testSignalWakesFifo(boolean fair) {
1016	>	final PublicReentrantLock lock =
1017	>	new PublicReentrantLock(fair);
1018		final Condition c = lock.newCondition();
1019	<	Thread t1 = new Thread(new Runnable() {
1020	<	public void run() {
1021	<	try {
1022	<	lock.lock();
1023	<	c.await();
1024	<	lock.unlock();
1025	<	}
1026	<	catch(InterruptedException e) {
1027	<	threadUnexpectedException();
1035	<	}
1036	<	}
1037	<	});
1038	<
1039	<	Thread t2 = new Thread(new Runnable() {
1040	<	public void run() {
1041	<	try {
1042	<	lock.lock();
1043	<	c.await();
1044	<	lock.unlock();
1045	<	}
1046	<	catch(InterruptedException e) {
1047	<	threadUnexpectedException();
1048	<	}
1049	<	}
1050	<	});
1019	>	final CountDownLatch locked1 = new CountDownLatch(1);
1020	>	final CountDownLatch locked2 = new CountDownLatch(1);
1021	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1022	>	public void realRun() throws InterruptedException {
1023	>	lock.lock();
1024	>	locked1.countDown();
1025	>	c.await();
1026	>	lock.unlock();
1027	>	}});
1028
1029	<	try {
1030	<	t1.start();
1031	<	t2.start();
1032	<	Thread.sleep(SHORT_DELAY_MS);
1033	<	lock.lock();
1034	<	c.signalAll();
1035	<	lock.unlock();
1036	<	t1.join(SHORT_DELAY_MS);
1037	<	t2.join(SHORT_DELAY_MS);
1038	<	assertFalse(t1.isAlive());
1039	<	assertFalse(t2.isAlive());
1040	<	}
1041	<	catch (Exception ex) {
1042	<	unexpectedException();
1043	<	}
1029	>	await(locked1);
1030	>
1031	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1032	>	public void realRun() throws InterruptedException {
1033	>	lock.lock();
1034	>	locked2.countDown();
1035	>	c.await();
1036	>	lock.unlock();
1037	>	}});
1038	>
1039	>	await(locked2);
1040	>
1041	>	lock.lock();
1042	>	assertHasWaiters(lock, c, t1, t2);
1043	>	assertFalse(lock.hasQueuedThreads());
1044	>	c.signal();
1045	>	assertHasWaiters(lock, c, t2);
1046	>	assertTrue(lock.hasQueuedThread(t1));
1047	>	assertFalse(lock.hasQueuedThread(t2));
1048	>	c.signal();
1049	>	assertHasNoWaiters(lock, c);
1050	>	assertTrue(lock.hasQueuedThread(t1));
1051	>	assertTrue(lock.hasQueuedThread(t2));
1052	>	lock.unlock();
1053	>	awaitTermination(t1);
1054	>	awaitTermination(t2);
1055		}
1056
1057		/**
1058		* await after multiple reentrant locking preserves lock count
1059		*/
1060	<	public void testAwaitLockCount() {
1061	<	final ReentrantLock lock = new ReentrantLock();
1060	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1061	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1062	>	public void testAwaitLockCount(boolean fair) {
1063	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1064		final Condition c = lock.newCondition();
1065	<	Thread t1 = new Thread(new Runnable() {
1066	<	public void run() {
1067	<	try {
1068	<	lock.lock();
1069	<	threadAssertEquals(1, lock.getHoldCount());
1070	<	c.await();
1071	<	threadAssertEquals(1, lock.getHoldCount());
1072	<	lock.unlock();
1073	<	}
1074	<	catch(InterruptedException e) {
1075	<	threadUnexpectedException();
1076	<	}
1087	<	}
1088	<	});
1089	<
1090	<	Thread t2 = new Thread(new Runnable() {
1091	<	public void run() {
1092	<	try {
1093	<	lock.lock();
1094	<	lock.lock();
1095	<	threadAssertEquals(2, lock.getHoldCount());
1096	<	c.await();
1097	<	threadAssertEquals(2, lock.getHoldCount());
1098	<	lock.unlock();
1099	<	lock.unlock();
1100	<	}
1101	<	catch(InterruptedException e) {
1102	<	threadUnexpectedException();
1103	<	}
1104	<	}
1105	<	});
1065	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1066	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1067	>	public void realRun() throws InterruptedException {
1068	>	lock.lock();
1069	>	assertLockedByMoi(lock);
1070	>	assertEquals(1, lock.getHoldCount());
1071	>	pleaseSignal.countDown();
1072	>	c.await();
1073	>	assertLockedByMoi(lock);
1074	>	assertEquals(1, lock.getHoldCount());
1075	>	lock.unlock();
1076	>	}});
1077
1078	<	try {
1079	<	t1.start();
1080	<	t2.start();
1081	<	Thread.sleep(SHORT_DELAY_MS);
1082	<	lock.lock();
1083	<	c.signalAll();
1084	<	lock.unlock();
1085	<	t1.join(SHORT_DELAY_MS);
1086	<	t2.join(SHORT_DELAY_MS);
1087	<	assertFalse(t1.isAlive());
1088	<	assertFalse(t2.isAlive());
1089	<	}
1090	<	catch (Exception ex) {
1091	<	unexpectedException();
1092	<	}
1078	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1079	>	public void realRun() throws InterruptedException {
1080	>	lock.lock();
1081	>	lock.lock();
1082	>	assertLockedByMoi(lock);
1083	>	assertEquals(2, lock.getHoldCount());
1084	>	pleaseSignal.countDown();
1085	>	c.await();
1086	>	assertLockedByMoi(lock);
1087	>	assertEquals(2, lock.getHoldCount());
1088	>	lock.unlock();
1089	>	lock.unlock();
1090	>	}});
1091	>
1092	>	await(pleaseSignal);
1093	>	lock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095	>	assertEquals(1, lock.getHoldCount());
1096	>	c.signalAll();
1097	>	assertHasNoWaiters(lock, c);
1098	>	lock.unlock();
1099	>	awaitTermination(t1);
1100	>	awaitTermination(t2);
1101		}
1102
1103		/**
1104		* A serialized lock deserializes as unlocked
1105		*/
1106	<	public void testSerialization() {
1107	<	ReentrantLock l = new ReentrantLock();
1108	<	l.lock();
1109	<	l.unlock();
1106	>	public void testSerialization()      { testSerialization(false); }
1107	>	public void testSerialization_fair() { testSerialization(true); }
1108	>	public void testSerialization(boolean fair) {
1109	>	final ReentrantLock lock = new ReentrantLock(fair);
1110	>	lock.lock();
1111
1112	<	try {
1113	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1114	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1115	<	out.writeObject(l);
1116	<	out.close();
1117	<
1118	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1119	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1120	<	ReentrantLock r = (ReentrantLock) in.readObject();
1121	<	r.lock();
1122	<	r.unlock();
1123	<	} catch(Exception e){
1124	<	e.printStackTrace();
1125	<	unexpectedException();
1126	<	}
1112	>	ReentrantLock clone = serialClone(lock);
1113	>	assertEquals(lock.isFair(), clone.isFair());
1114	>	assertTrue(lock.isLocked());
1115	>	assertFalse(clone.isLocked());
1116	>	assertEquals(1, lock.getHoldCount());
1117	>	assertEquals(0, clone.getHoldCount());
1118	>	clone.lock();
1119	>	clone.lock();
1120	>	assertTrue(clone.isLocked());
1121	>	assertEquals(2, clone.getHoldCount());
1122	>	assertEquals(1, lock.getHoldCount());
1123	>	clone.unlock();
1124	>	clone.unlock();
1125	>	assertTrue(lock.isLocked());
1126	>	assertFalse(clone.isLocked());
1127		}
1128
1129		/**
1130		* toString indicates current lock state
1131		*/
1132	<	public void testToString() {
1133	<	ReentrantLock lock = new ReentrantLock();
1134	<	String us = lock.toString();
1135	<	assertTrue(us.indexOf("Unlocked") >= 0);
1132	>	public void testToString()      { testToString(false); }
1133	>	public void testToString_fair() { testToString(true); }
1134	>	public void testToString(boolean fair) {
1135	>	final ReentrantLock lock = new ReentrantLock(fair);
1136	>	assertTrue(lock.toString().contains("Unlocked"));
1137		lock.lock();
1138	<	String ls = lock.toString();
1139	<	assertTrue(ls.indexOf("Locked") >= 0);
1138	>	assertTrue(lock.toString().contains("Locked by"));
1139	>	lock.unlock();
1140	>	assertTrue(lock.toString().contains("Unlocked"));
1141		}
1142
1143	+	/**
1144	+	* Tests scenario for JDK-8187408
1145	+	* AbstractQueuedSynchronizer wait queue corrupted when thread awaits without holding the lock
1146	+	*/
1147	+	public void testBug8187408() throws InterruptedException {
1148	+	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
1149	+	final AwaitMethod awaitMethod = randomAwaitMethod();
1150	+	final int nThreads = rnd.nextInt(2, 10);
1151	+	final ReentrantLock lock = new ReentrantLock();
1152	+	final Condition cond = lock.newCondition();
1153	+	final CountDownLatch done = new CountDownLatch(nThreads);
1154	+	final ArrayList<Thread> threads = new ArrayList<>();
1155	+
1156	+	Runnable rogue = () -> {
1157	+	while (done.getCount() > 0) {
1158	+	try {
1159	+	// call await without holding lock?!
1160	+	await(cond, awaitMethod);
1161	+	throw new AssertionError("should throw");
1162	+	}
1163	+	catch (IllegalMonitorStateException expected) {}
1164	+	catch (Throwable fail) { threadUnexpectedException(fail); }}};
1165	+	Thread rogueThread = new Thread(rogue, "rogue");
1166	+	threads.add(rogueThread);
1167	+	rogueThread.start();
1168	+
1169	+	Runnable waiter = () -> {
1170	+	lock.lock();
1171	+	try {
1172	+	done.countDown();
1173	+	cond.await();
1174	+	} catch (Throwable fail) {
1175	+	threadUnexpectedException(fail);
1176	+	} finally {
1177	+	lock.unlock();
1178	+	}};
1179	+	for (int i = 0; i < nThreads; i++) {
1180	+	Thread thread = new Thread(waiter, "waiter");
1181	+	threads.add(thread);
1182	+	thread.start();
1183	+	}
1184	+
1185	+	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
1186	+	lock.lock();
1187	+	try {
1188	+	assertEquals(nThreads, lock.getWaitQueueLength(cond));
1189	+	} finally {
1190	+	cond.signalAll();
1191	+	lock.unlock();
1192	+	}
1193	+	for (Thread thread : threads) {
1194	+	thread.join(LONG_DELAY_MS);
1195	+	assertFalse(thread.isAlive());
1196	+	}
1197	+	}
1198		}

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