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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.4 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.52 by jsr166, Thu May 30 03:28:55 2013 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
10	>	import java.util.concurrent.locks.Condition;
11	>	import java.util.concurrent.locks.ReentrantLock;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15	>	import java.util.*;
16
17		public class ReentrantLockTest extends JSR166TestCase {
14	–	static int HOLD_COUNT_TEST_LIMIT = 20;
15	–
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
19	–
21		public static Test suite() {
22	<	return new TestSuite(ReentrantLockTest.class);
22	>	return new TestSuite(ReentrantLockTest.class);
23	>	}
24	>
25	>	/**
26	>	* A runnable calling lockInterruptibly
27	>	*/
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29	>	final ReentrantLock lock;
30	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
31	>	public void realRun() throws InterruptedException {
32	>	lock.lockInterruptibly();
33	>	}
34	>	}
35	>
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39	>	*/
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	>	final ReentrantLock lock;
42	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45	>	}
46	>	}
47	>
48	>	/**
49	>	* Subclass to expose protected methods
50	>	*/
51	>	static class PublicReentrantLock extends ReentrantLock {
52	>	PublicReentrantLock() { super(); }
53	>	PublicReentrantLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56	>	}
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>	}
64	>
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67	>	*/
68	>	void releaseLock(PublicReentrantLock lock) {
69	>	assertLockedByMoi(lock);
70	>	lock.unlock();
71	>	assertFalse(lock.isHeldByCurrentThread());
72	>	assertNotLocked(lock);
73	>	}
74	>
75	>	/**
76	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
77	>	*/
78	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
79	>	long startTime = System.nanoTime();
80	>	while (!lock.hasQueuedThread(t)) {
81	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
82	>	throw new AssertionFailedError("timed out");
83	>	Thread.yield();
84	>	}
85	>	assertTrue(t.isAlive());
86	>	assertNotSame(t, lock.getOwner());
87	>	}
88	>
89	>	/**
90	>	* Checks that lock is not locked.
91	>	*/
92	>	void assertNotLocked(PublicReentrantLock lock) {
93	>	assertFalse(lock.isLocked());
94	>	assertFalse(lock.isHeldByCurrentThread());
95	>	assertNull(lock.getOwner());
96	>	assertEquals(0, lock.getHoldCount());
97		}
98
99	<	/*
100	<	* Unlocks an unlocked lock, throws Illegal Monitor State
26	<	*
99	>	/**
100	>	* Checks that lock is locked by the given thread.
101		*/
102	<	public void testIllegalMonitorStateException(){
103	<	ReentrantLock rl = new ReentrantLock();
104	<	try{
105	<	rl.unlock();
106	<	fail("Should of thown Illegal Monitor State Exception");
102	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
103	>	assertTrue(lock.isLocked());
104	>	assertSame(t, lock.getOwner());
105	>	assertEquals(t == Thread.currentThread(),
106	>	lock.isHeldByCurrentThread());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.getHoldCount() > 0);
109	>	}
110
111	<	} catch(IllegalMonitorStateException success){}
111	>	/**
112	>	* Checks that lock is locked by the current thread.
113	>	*/
114	>	void assertLockedByMoi(PublicReentrantLock lock) {
115	>	assertLockedBy(lock, Thread.currentThread());
116	>	}
117	>
118	>	/**
119	>	* Checks that condition c has no waiters.
120	>	*/
121	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
122	>	assertHasWaiters(lock, c, new Thread[] {});
123	>	}
124	>
125	>	/**
126	>	* Checks that condition c has exactly the given waiter threads.
127	>	*/
128	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
129	>	Thread... threads) {
130	>	lock.lock();
131	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
132	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
133	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
134	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
135	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
136	>	new HashSet<Thread>(Arrays.asList(threads)));
137	>	lock.unlock();
138	>	}
139	>
140	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
141	>
142	>	/**
143	>	* Awaits condition using the specified AwaitMethod.
144	>	*/
145	>	void await(Condition c, AwaitMethod awaitMethod)
146	>	throws InterruptedException {
147	>	long timeoutMillis = 2 * LONG_DELAY_MS;
148	>	switch (awaitMethod) {
149	>	case await:
150	>	c.await();
151	>	break;
152	>	case awaitTimed:
153	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
154	>	break;
155	>	case awaitNanos:
156	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
157	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
158	>	assertTrue(nanosRemaining > 0);
159	>	break;
160	>	case awaitUntil:
161	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
162	>	break;
163	>	}
164	>	}
165
166	+	/**
167	+	* Constructor sets given fairness, and is in unlocked state
168	+	*/
169	+	public void testConstructor() {
170	+	PublicReentrantLock lock;
171
172	+	lock = new PublicReentrantLock();
173	+	assertFalse(lock.isFair());
174	+	assertNotLocked(lock);
175	+
176	+	lock = new PublicReentrantLock(true);
177	+	assertTrue(lock.isFair());
178	+	assertNotLocked(lock);
179	+
180	+	lock = new PublicReentrantLock(false);
181	+	assertFalse(lock.isFair());
182	+	assertNotLocked(lock);
183		}
184	<
185	<	/*
186	<	* makes a lock, locks it, tries to aquire the lock in another thread
41	<	* interrupts that thread and waits for an interrupted Exception to
42	<	* be thrown.
184	>
185	>	/**
186	>	* locking an unlocked lock succeeds
187		*/
188	+	public void testLock()      { testLock(false); }
189	+	public void testLock_fair() { testLock(true); }
190	+	public void testLock(boolean fair) {
191	+	PublicReentrantLock lock = new PublicReentrantLock(fair);
192	+	lock.lock();
193	+	assertLockedByMoi(lock);
194	+	releaseLock(lock);
195	+	}
196
197	<	public void testInterruptedException(){
198	<	final ReentrantLock lock = new ReentrantLock();
199	<	lock.lock();
200	<	Thread t = new Thread(new Runnable() {
201	<	public void run(){
202	<	try{
203	<	lock.lockInterruptibly();
52	<	threadFail("should throw");
53	<	} catch(InterruptedException success){}
54	<	}
55	<	});
197	>	/**
198	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
199	>	*/
200	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
201	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
202	>	public void testUnlock_IMSE(boolean fair) {
203	>	ReentrantLock lock = new ReentrantLock(fair);
204		try {
57	–	t.start();
58	–	t.interrupt();
205		lock.unlock();
206	<	t.join();
207	<	} catch(Exception e){
208	<	fail("unexpected exception");
209	<	}
210	<	}
211	<
212	<	/*
213	<	* tests for interrupted exception on a timed wait
214	<	*
215	<	*/
216	<
217	<
218	<	public void testInterruptedException2(){
219	<	final ReentrantLock lock = new ReentrantLock();
220	<	lock.lock();
221	<	Thread t = new Thread(new Runnable() {
222	<	public void run(){
77	<	try{
78	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
79	<	threadFail("should throw");
80	<	} catch(InterruptedException success){}
81	<	}
82	<	});
83	<	try {
84	<	t.start();
85	<	t.interrupt();
86	<	} catch(Exception e){
87	<	fail("unexpected exception");
88	<	}
206	>	shouldThrow();
207	>	} catch (IllegalMonitorStateException success) {}
208	>	}
209	>
210	>	/**
211	>	* tryLock on an unlocked lock succeeds
212	>	*/
213	>	public void testTryLock()      { testTryLock(false); }
214	>	public void testTryLock_fair() { testTryLock(true); }
215	>	public void testTryLock(boolean fair) {
216	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
217	>	assertTrue(lock.tryLock());
218	>	assertLockedByMoi(lock);
219	>	assertTrue(lock.tryLock());
220	>	assertLockedByMoi(lock);
221	>	lock.unlock();
222	>	releaseLock(lock);
223		}
224
225	+	/**
226	+	* hasQueuedThreads reports whether there are waiting threads
227	+	*/
228	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
229	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
230	+	public void testHasQueuedThreads(boolean fair) {
231	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
232	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
233	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
234	+	assertFalse(lock.hasQueuedThreads());
235	+	lock.lock();
236	+	assertFalse(lock.hasQueuedThreads());
237	+	t1.start();
238	+	waitForQueuedThread(lock, t1);
239	+	assertTrue(lock.hasQueuedThreads());
240	+	t2.start();
241	+	waitForQueuedThread(lock, t2);
242	+	assertTrue(lock.hasQueuedThreads());
243	+	t1.interrupt();
244	+	awaitTermination(t1);
245	+	assertTrue(lock.hasQueuedThreads());
246	+	lock.unlock();
247	+	awaitTermination(t2);
248	+	assertFalse(lock.hasQueuedThreads());
249	+	}
250
251	<	public void testTryLockWhenLocked() {
252	<	final ReentrantLock lock = new ReentrantLock();
253	<	lock.lock();
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run(){
256	<	threadAssertFalse(lock.tryLock());
257	<	}
258	<	});
251	>	/**
252	>	* getQueueLength reports number of waiting threads
253	>	*/
254	>	public void testGetQueueLength()      { testGetQueueLength(false); }
255	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
256	>	public void testGetQueueLength(boolean fair) {
257	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
258	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
259	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
260	>	assertEquals(0, lock.getQueueLength());
261	>	lock.lock();
262	>	t1.start();
263	>	waitForQueuedThread(lock, t1);
264	>	assertEquals(1, lock.getQueueLength());
265	>	t2.start();
266	>	waitForQueuedThread(lock, t2);
267	>	assertEquals(2, lock.getQueueLength());
268	>	t1.interrupt();
269	>	awaitTermination(t1);
270	>	assertEquals(1, lock.getQueueLength());
271	>	lock.unlock();
272	>	awaitTermination(t2);
273	>	assertEquals(0, lock.getQueueLength());
274	>	}
275	>
276	>	/**
277	>	* hasQueuedThread(null) throws NPE
278	>	*/
279	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
280	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
281	>	public void testHasQueuedThreadNPE(boolean fair) {
282	>	final ReentrantLock lock = new ReentrantLock(fair);
283		try {
284	<	t.start();
285	<	t.join();
284	>	lock.hasQueuedThread(null);
285	>	shouldThrow();
286	>	} catch (NullPointerException success) {}
287	>	}
288	>
289	>	/**
290	>	* hasQueuedThread reports whether a thread is queued
291	>	*/
292	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
293	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
294	>	public void testHasQueuedThread(boolean fair) {
295	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
296	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
297	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
298	>	assertFalse(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	lock.lock();
301	>	t1.start();
302	>	waitForQueuedThread(lock, t1);
303	>	assertTrue(lock.hasQueuedThread(t1));
304	>	assertFalse(lock.hasQueuedThread(t2));
305	>	t2.start();
306	>	waitForQueuedThread(lock, t2);
307	>	assertTrue(lock.hasQueuedThread(t1));
308	>	assertTrue(lock.hasQueuedThread(t2));
309	>	t1.interrupt();
310	>	awaitTermination(t1);
311	>	assertFalse(lock.hasQueuedThread(t1));
312	>	assertTrue(lock.hasQueuedThread(t2));
313	>	lock.unlock();
314	>	awaitTermination(t2);
315	>	assertFalse(lock.hasQueuedThread(t1));
316	>	assertFalse(lock.hasQueuedThread(t2));
317	>	}
318	>
319	>	/**
320	>	* getQueuedThreads includes waiting threads
321	>	*/
322	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
323	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
324	>	public void testGetQueuedThreads(boolean fair) {
325	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
326	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
327	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
328	>	assertTrue(lock.getQueuedThreads().isEmpty());
329	>	lock.lock();
330	>	assertTrue(lock.getQueuedThreads().isEmpty());
331	>	t1.start();
332	>	waitForQueuedThread(lock, t1);
333	>	assertEquals(1, lock.getQueuedThreads().size());
334	>	assertTrue(lock.getQueuedThreads().contains(t1));
335	>	t2.start();
336	>	waitForQueuedThread(lock, t2);
337	>	assertEquals(2, lock.getQueuedThreads().size());
338	>	assertTrue(lock.getQueuedThreads().contains(t1));
339	>	assertTrue(lock.getQueuedThreads().contains(t2));
340	>	t1.interrupt();
341	>	awaitTermination(t1);
342	>	assertFalse(lock.getQueuedThreads().contains(t1));
343	>	assertTrue(lock.getQueuedThreads().contains(t2));
344	>	assertEquals(1, lock.getQueuedThreads().size());
345	>	lock.unlock();
346	>	awaitTermination(t2);
347	>	assertTrue(lock.getQueuedThreads().isEmpty());
348	>	}
349	>
350	>	/**
351	>	* timed tryLock is interruptible
352	>	*/
353	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
354	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
355	>	public void testTryLock_Interruptible(boolean fair) {
356	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
357	>	lock.lock();
358	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
361	>	}});
362	>
363	>	waitForQueuedThread(lock, t);
364	>	t.interrupt();
365	>	awaitTermination(t);
366	>	releaseLock(lock);
367	>	}
368	>
369	>	/**
370	>	* tryLock on a locked lock fails
371	>	*/
372	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
373	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
374	>	public void testTryLockWhenLocked(boolean fair) {
375	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
376	>	lock.lock();
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() {
379	>	assertFalse(lock.tryLock());
380	>	}});
381	>
382	>	awaitTermination(t);
383	>	releaseLock(lock);
384	>	}
385	>
386	>	/**
387	>	* Timed tryLock on a locked lock times out
388	>	*/
389	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
390	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
391	>	public void testTryLock_Timeout(boolean fair) {
392	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
393	>	lock.lock();
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws InterruptedException {
396	>	long startTime = System.nanoTime();
397	>	long timeoutMillis = 10;
398	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
399	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
400	>	}});
401	>
402	>	awaitTermination(t);
403	>	releaseLock(lock);
404	>	}
405	>
406	>	/**
407	>	* getHoldCount returns number of recursive holds
408	>	*/
409	>	public void testGetHoldCount()      { testGetHoldCount(false); }
410	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
411	>	public void testGetHoldCount(boolean fair) {
412	>	ReentrantLock lock = new ReentrantLock(fair);
413	>	for (int i = 1; i <= SIZE; i++) {
414	>	lock.lock();
415	>	assertEquals(i, lock.getHoldCount());
416	>	}
417	>	for (int i = SIZE; i > 0; i--) {
418		lock.unlock();
419	<	} catch(Exception e){
105	<	fail("unexpected exception");
419	>	assertEquals(i-1, lock.getHoldCount());
420		}
421	<	}
421	>	}
422
423	<	public void testTryLock_Timeout(){
424	<	final ReentrantLock lock = new ReentrantLock();
425	<	lock.lock();
426	<	Thread t = new Thread(new Runnable() {
427	<	public void run(){
428	<	try {
115	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
116	<	} catch (Exception ex) {
117	<	threadFail("unexpected exception");
118	<	}
119	<	}
120	<	});
423	>	/**
424	>	* isLocked is true when locked and false when not
425	>	*/
426	>	public void testIsLocked()      { testIsLocked(false); }
427	>	public void testIsLocked_fair() { testIsLocked(true); }
428	>	public void testIsLocked(boolean fair) {
429		try {
430	<	t.start();
431	<	t.join();
430	>	final ReentrantLock lock = new ReentrantLock(fair);
431	>	assertFalse(lock.isLocked());
432	>	lock.lock();
433	>	assertTrue(lock.isLocked());
434	>	lock.lock();
435	>	assertTrue(lock.isLocked());
436		lock.unlock();
125	–	} catch(Exception e){
126	–	fail("unexpected exception");
127	–	}
128	–	}
129	–
130	–	public void testGetHoldCount() {
131	–	ReentrantLock lock = new ReentrantLock();
132	–	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
133	–	lock.lock();
134	–	assertEquals(i,lock.getHoldCount());
135	–	}
136	–	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
137	–	lock.unlock();
138	–	assertEquals(i-1,lock.getHoldCount());
139	–	}
140	–	}
141	–
142	–
143	–
144	–
145	–	public void testIsLocked() {
146	–	final ReentrantLock lock = new ReentrantLock();
147	–	lock.lock();
148	–	assertTrue(lock.isLocked());
149	–	lock.unlock();
150	–	assertFalse(lock.isLocked());
151	–	Thread t = new Thread(new Runnable() {
152	–	public void run() {
153	–	lock.lock();
154	–	try {
155	–	Thread.sleep(SMALL_DELAY_MS);
156	–	}
157	–	catch(Exception e) {
158	–	threadFail("unexpected exception");
159	–	}
160	–	lock.unlock();
161	–	}
162	–	});
163	–	try{
164	–	t.start();
165	–	Thread.sleep(SHORT_DELAY_MS);
437		assertTrue(lock.isLocked());
438	<	t.join();
438	>	lock.unlock();
439	>	assertFalse(lock.isLocked());
440	>	final CyclicBarrier barrier = new CyclicBarrier(2);
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws Exception {
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445	>	barrier.await();
446	>	barrier.await();
447	>	lock.unlock();
448	>	}});
449	>
450	>	barrier.await();
451	>	assertTrue(lock.isLocked());
452	>	barrier.await();
453	>	awaitTermination(t);
454		assertFalse(lock.isLocked());
455	<	} catch(Exception e){
456	<	fail("unexpected exception");
455	>	} catch (Exception e) {
456	>	threadUnexpectedException(e);
457		}
458		}
459
460	<
461	<	public void testLockInterruptibly() {
462	<	final ReentrantLock lock = new ReentrantLock();
463	<	try {
464	<	lock.lockInterruptibly();
465	<	} catch(Exception e) {
466	<	fail("unexpected exception");
181	<	}
182	<	Thread t = new Thread(new Runnable() {
183	<	public void run() {
184	<	try {
185	<	lock.lockInterruptibly();
186	<	threadFail("should throw");
187	<	}
188	<	catch(InterruptedException e) {}
189	<	}
190	<	});
460	>	/**
461	>	* lockInterruptibly succeeds when unlocked, else is interruptible
462	>	*/
463	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
464	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
465	>	public void testLockInterruptibly(boolean fair) {
466	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
467		try {
468	<	t.start();
469	<	t.interrupt();
470	<	assertTrue(lock.isLocked());
195	<	assertTrue(lock.isHeldByCurrentThread());
196	<	t.join();
197	<	} catch(Exception e){
198	<	fail("unexpected exception");
468	>	lock.lockInterruptibly();
469	>	} catch (InterruptedException ie) {
470	>	threadUnexpectedException(ie);
471		}
472	+	assertLockedByMoi(lock);
473	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
474	+	waitForQueuedThread(lock, t);
475	+	t.interrupt();
476	+	assertTrue(lock.isLocked());
477	+	assertTrue(lock.isHeldByCurrentThread());
478	+	awaitTermination(t);
479	+	releaseLock(lock);
480		}
481
482	<	public void testAwait_IllegalMonitor() {
483	<	final ReentrantLock lock = new ReentrantLock();
482	>	/**
483	>	* Calling await without holding lock throws IllegalMonitorStateException
484	>	*/
485	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
486	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
487	>	public void testAwait_IMSE(boolean fair) {
488	>	final ReentrantLock lock = new ReentrantLock(fair);
489		final Condition c = lock.newCondition();
490	<	try {
491	<	c.await();
492	<	fail("should throw");
493	<	}
494	<	catch (IllegalMonitorStateException success) {
495	<	}
496	<	catch (Exception ex) {
497	<	fail("should throw IMSE");
490	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
491	>	long startTime = System.nanoTime();
492	>	try {
493	>	await(c, awaitMethod);
494	>	shouldThrow();
495	>	} catch (IllegalMonitorStateException success) {
496	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
497	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
498		}
499		}
500
501	<	public void testSignal_IllegalMonitor() {
502	<	final ReentrantLock lock = new ReentrantLock();
501	>	/**
502	>	* Calling signal without holding lock throws IllegalMonitorStateException
503	>	*/
504	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
505	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
506	>	public void testSignal_IMSE(boolean fair) {
507	>	final ReentrantLock lock = new ReentrantLock(fair);
508		final Condition c = lock.newCondition();
509		try {
510		c.signal();
511	<	fail("should throw");
512	<	}
223	<	catch (IllegalMonitorStateException success) {
224	<	}
225	<	catch (Exception ex) {
226	<	fail("should throw IMSE");
227	<	}
511	>	shouldThrow();
512	>	} catch (IllegalMonitorStateException success) {}
513		}
514
515	<	public void testAwaitNanos_Timeout() {
516	<	final ReentrantLock lock = new ReentrantLock();
517	<	final Condition c = lock.newCondition();
515	>	/**
516	>	* awaitNanos without a signal times out
517	>	*/
518	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
519	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
520	>	public void testAwaitNanos_Timeout(boolean fair) {
521		try {
522	+	final ReentrantLock lock = new ReentrantLock(fair);
523	+	final Condition c = lock.newCondition();
524		lock.lock();
525	<	long t = c.awaitNanos(100);
526	<	assertTrue(t <= 0);
525	>	long startTime = System.nanoTime();
526	>	long timeoutMillis = 10;
527	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
528	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
529	>	assertTrue(nanosRemaining <= 0);
530	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
531		lock.unlock();
532	<	}
533	<	catch (Exception ex) {
240	<	fail("unexpected exception");
532	>	} catch (InterruptedException e) {
533	>	threadUnexpectedException(e);
534		}
535		}
536
537	<	public void testAwait_Timeout() {
538	<	final ReentrantLock lock = new ReentrantLock();
539	<	final Condition c = lock.newCondition();
537	>	/**
538	>	* timed await without a signal times out
539	>	*/
540	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
541	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
542	>	public void testAwait_Timeout(boolean fair) {
543		try {
544	+	final ReentrantLock lock = new ReentrantLock(fair);
545	+	final Condition c = lock.newCondition();
546		lock.lock();
547	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
547	>	long startTime = System.nanoTime();
548	>	long timeoutMillis = 10;
549	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
550	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
551		lock.unlock();
552	<	}
553	<	catch (Exception ex) {
253	<	fail("unexpected exception");
552	>	} catch (InterruptedException e) {
553	>	threadUnexpectedException(e);
554		}
555		}
556
557	<	public void testAwaitUntil_Timeout() {
558	<	final ReentrantLock lock = new ReentrantLock();
559	<	final Condition c = lock.newCondition();
557	>	/**
558	>	* awaitUntil without a signal times out
559	>	*/
560	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
561	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
562	>	public void testAwaitUntil_Timeout(boolean fair) {
563		try {
564	+	final ReentrantLock lock = new ReentrantLock(fair);
565	+	final Condition c = lock.newCondition();
566		lock.lock();
567	+	long startTime = System.nanoTime();
568	+	long timeoutMillis = 10;
569		java.util.Date d = new java.util.Date();
570	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
570	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
571	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
572		lock.unlock();
573	<	}
574	<	catch (Exception ex) {
267	<	fail("unexpected exception");
573	>	} catch (InterruptedException e) {
574	>	threadUnexpectedException(e);
575		}
576		}
577
578	<	public void testAwait() {
579	<	final ReentrantLock lock = new ReentrantLock();
578	>	/**
579	>	* await returns when signalled
580	>	*/
581	>	public void testAwait()      { testAwait(false); }
582	>	public void testAwait_fair() { testAwait(true); }
583	>	public void testAwait(boolean fair) {
584	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
585		final Condition c = lock.newCondition();
586	<	Thread t = new Thread(new Runnable() {
587	<	public void run() {
588	<	try {
589	<	lock.lock();
590	<	c.await();
591	<	lock.unlock();
592	<	}
593	<	catch(InterruptedException e) {
594	<	threadFail("unexpected exception");
595	<	}
596	<	}
597	<	});
586	>	final CountDownLatch locked = new CountDownLatch(1);
587	>	Thread t = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws InterruptedException {
589	>	lock.lock();
590	>	locked.countDown();
591	>	c.await();
592	>	lock.unlock();
593	>	}});
594	>
595	>	await(locked);
596	>	lock.lock();
597	>	assertHasWaiters(lock, c, t);
598	>	c.signal();
599	>	assertHasNoWaiters(lock, c);
600	>	assertTrue(t.isAlive());
601	>	lock.unlock();
602	>	awaitTermination(t);
603	>	}
604
605	+	/**
606	+	* hasWaiters throws NPE if null
607	+	*/
608	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
609	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
610	+	public void testHasWaitersNPE(boolean fair) {
611	+	final ReentrantLock lock = new ReentrantLock(fair);
612		try {
613	<	t.start();
614	<	Thread.sleep(SHORT_DELAY_MS);
615	<	lock.lock();
291	<	c.signal();
292	<	lock.unlock();
293	<	t.join(SHORT_DELAY_MS);
294	<	assertFalse(t.isAlive());
295	<	}
296	<	catch (Exception ex) {
297	<	fail("unexpected exception");
298	<	}
613	>	lock.hasWaiters(null);
614	>	shouldThrow();
615	>	} catch (NullPointerException success) {}
616		}
617
618	<	public void testAwaitUninterruptibly() {
619	<	final ReentrantLock lock = new ReentrantLock();
620	<	final Condition c = lock.newCondition();
621	<	Thread t = new Thread(new Runnable() {
622	<	public void run() {
623	<	lock.lock();
624	<	c.awaitUninterruptibly();
625	<	lock.unlock();
626	<	}
627	<	});
618	>	/**
619	>	* getWaitQueueLength throws NPE if null
620	>	*/
621	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
622	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
623	>	public void testGetWaitQueueLengthNPE(boolean fair) {
624	>	final ReentrantLock lock = new ReentrantLock(fair);
625	>	try {
626	>	lock.getWaitQueueLength(null);
627	>	shouldThrow();
628	>	} catch (NullPointerException success) {}
629	>	}
630
631	+	/**
632	+	* getWaitingThreads throws NPE if null
633	+	*/
634	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
635	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
636	+	public void testGetWaitingThreadsNPE(boolean fair) {
637	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
638		try {
639	<	t.start();
640	<	Thread.sleep(SHORT_DELAY_MS);
641	<	t.interrupt();
316	<	lock.lock();
317	<	c.signal();
318	<	lock.unlock();
319	<	t.join(SHORT_DELAY_MS);
320	<	assertFalse(t.isAlive());
321	<	}
322	<	catch (Exception ex) {
323	<	fail("unexpected exception");
324	<	}
639	>	lock.getWaitingThreads(null);
640	>	shouldThrow();
641	>	} catch (NullPointerException success) {}
642		}
643
644	<	public void testAwait_Interrupt() {
645	<	final ReentrantLock lock = new ReentrantLock();
644	>	/**
645	>	* hasWaiters throws IllegalArgumentException if not owned
646	>	*/
647	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
648	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
649	>	public void testHasWaitersIAE(boolean fair) {
650	>	final ReentrantLock lock = new ReentrantLock(fair);
651		final Condition c = lock.newCondition();
652	<	Thread t = new Thread(new Runnable() {
331	<	public void run() {
332	<	try {
333	<	lock.lock();
334	<	c.await();
335	<	lock.unlock();
336	<	threadFail("should throw");
337	<	}
338	<	catch(InterruptedException success) {
339	<	}
340	<	}
341	<	});
342	<
652	>	final ReentrantLock lock2 = new ReentrantLock(fair);
653		try {
654	<	t.start();
655	<	Thread.sleep(SHORT_DELAY_MS);
656	<	t.interrupt();
347	<	t.join(SHORT_DELAY_MS);
348	<	assertFalse(t.isAlive());
349	<	}
350	<	catch (Exception ex) {
351	<	fail("unexpected exception");
352	<	}
654	>	lock2.hasWaiters(c);
655	>	shouldThrow();
656	>	} catch (IllegalArgumentException success) {}
657		}
658
659	<	public void testAwaitNanos_Interrupt() {
660	<	final ReentrantLock lock = new ReentrantLock();
659	>	/**
660	>	* hasWaiters throws IllegalMonitorStateException if not locked
661	>	*/
662	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
663	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
664	>	public void testHasWaitersIMSE(boolean fair) {
665	>	final ReentrantLock lock = new ReentrantLock(fair);
666		final Condition c = lock.newCondition();
667	<	Thread t = new Thread(new Runnable() {
668	<	public void run() {
669	<	try {
670	<	lock.lock();
362	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
363	<	lock.unlock();
364	<	threadFail("should throw");
365	<	}
366	<	catch(InterruptedException success) {
367	<	}
368	<	}
369	<	});
370	<
371	<	try {
372	<	t.start();
373	<	Thread.sleep(SHORT_DELAY_MS);
374	<	t.interrupt();
375	<	t.join(SHORT_DELAY_MS);
376	<	assertFalse(t.isAlive());
377	<	}
378	<	catch (Exception ex) {
379	<	fail("unexpected exception");
380	<	}
667	>	try {
668	>	lock.hasWaiters(c);
669	>	shouldThrow();
670	>	} catch (IllegalMonitorStateException success) {}
671		}
672
673	<	public void testAwaitUntil_Interrupt() {
674	<	final ReentrantLock lock = new ReentrantLock();
675	<	final Condition c = lock.newCondition();
676	<	Thread t = new Thread(new Runnable() {
677	<	public void run() {
678	<	try {
679	<	lock.lock();
680	<	java.util.Date d = new java.util.Date();
681	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
682	<	lock.unlock();
683	<	threadFail("should throw");
684	<	}
685	<	catch(InterruptedException success) {
686	<	}
397	<	}
398	<	});
673	>	/**
674	>	* getWaitQueueLength throws IllegalArgumentException if not owned
675	>	*/
676	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
677	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
678	>	public void testGetWaitQueueLengthIAE(boolean fair) {
679	>	final ReentrantLock lock = new ReentrantLock(fair);
680	>	final Condition c = lock.newCondition();
681	>	final ReentrantLock lock2 = new ReentrantLock(fair);
682	>	try {
683	>	lock2.getWaitQueueLength(c);
684	>	shouldThrow();
685	>	} catch (IllegalArgumentException success) {}
686	>	}
687
688	+	/**
689	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
690	+	*/
691	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
692	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
693	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
694	+	final ReentrantLock lock = new ReentrantLock(fair);
695	+	final Condition c = lock.newCondition();
696		try {
697	<	t.start();
698	<	Thread.sleep(SHORT_DELAY_MS);
699	<	t.interrupt();
404	<	t.join(SHORT_DELAY_MS);
405	<	assertFalse(t.isAlive());
406	<	}
407	<	catch (Exception ex) {
408	<	fail("unexpected exception");
409	<	}
697	>	lock.getWaitQueueLength(c);
698	>	shouldThrow();
699	>	} catch (IllegalMonitorStateException success) {}
700		}
701
702	<	public void testSignalAll() {
703	<	final ReentrantLock lock = new ReentrantLock();
702	>	/**
703	>	* getWaitingThreads throws IllegalArgumentException if not owned
704	>	*/
705	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
706	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
707	>	public void testGetWaitingThreadsIAE(boolean fair) {
708	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
709		final Condition c = lock.newCondition();
710	<	Thread t1 = new Thread(new Runnable() {
711	<	public void run() {
712	<	try {
713	<	lock.lock();
714	<	c.await();
715	<	lock.unlock();
421	<	}
422	<	catch(InterruptedException e) {
423	<	threadFail("unexpected exception");
424	<	}
425	<	}
426	<	});
427	<
428	<	Thread t2 = new Thread(new Runnable() {
429	<	public void run() {
430	<	try {
431	<	lock.lock();
432	<	c.await();
433	<	lock.unlock();
434	<	}
435	<	catch(InterruptedException e) {
436	<	threadFail("unexpected exception");
437	<	}
438	<	}
439	<	});
710	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
711	>	try {
712	>	lock2.getWaitingThreads(c);
713	>	shouldThrow();
714	>	} catch (IllegalArgumentException success) {}
715	>	}
716
717	+	/**
718	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
719	+	*/
720	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
721	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
722	+	public void testGetWaitingThreadsIMSE(boolean fair) {
723	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
724	+	final Condition c = lock.newCondition();
725		try {
726	<	t1.start();
727	<	t2.start();
728	<	Thread.sleep(SHORT_DELAY_MS);
445	<	lock.lock();
446	<	c.signalAll();
447	<	lock.unlock();
448	<	t1.join(SHORT_DELAY_MS);
449	<	t2.join(SHORT_DELAY_MS);
450	<	assertFalse(t1.isAlive());
451	<	assertFalse(t2.isAlive());
452	<	}
453	<	catch (Exception ex) {
454	<	fail("unexpected exception");
455	<	}
726	>	lock.getWaitingThreads(c);
727	>	shouldThrow();
728	>	} catch (IllegalMonitorStateException success) {}
729		}
730
731	<	public void testSerialization() {
732	<	ReentrantLock l = new ReentrantLock();
733	<	l.lock();
734	<	l.unlock();
735	<
736	<	try {
737	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
738	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
739	<	out.writeObject(l);
740	<	out.close();
741	<
742	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
743	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
744	<	ReentrantLock r = (ReentrantLock) in.readObject();
745	<	r.lock();
746	<	r.unlock();
747	<	} catch(Exception e){
748	<	e.printStackTrace();
749	<	fail("unexpected exception");
750	<	}
731	>	/**
732	>	* hasWaiters returns true when a thread is waiting, else false
733	>	*/
734	>	public void testHasWaiters()      { testHasWaiters(false); }
735	>	public void testHasWaiters_fair() { testHasWaiters(true); }
736	>	public void testHasWaiters(boolean fair) {
737	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
738	>	final Condition c = lock.newCondition();
739	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
740	>	Thread t = newStartedThread(new CheckedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.lock();
743	>	assertHasNoWaiters(lock, c);
744	>	assertFalse(lock.hasWaiters(c));
745	>	pleaseSignal.countDown();
746	>	c.await();
747	>	assertHasNoWaiters(lock, c);
748	>	assertFalse(lock.hasWaiters(c));
749	>	lock.unlock();
750	>	}});
751	>
752	>	await(pleaseSignal);
753	>	lock.lock();
754	>	assertHasWaiters(lock, c, t);
755	>	assertTrue(lock.hasWaiters(c));
756	>	c.signal();
757	>	assertHasNoWaiters(lock, c);
758	>	assertFalse(lock.hasWaiters(c));
759	>	lock.unlock();
760	>	awaitTermination(t);
761	>	assertHasNoWaiters(lock, c);
762	>	}
763	>
764	>	/**
765	>	* getWaitQueueLength returns number of waiting threads
766	>	*/
767	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
768	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
769	>	public void testGetWaitQueueLength(boolean fair) {
770	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
771	>	final Condition c = lock.newCondition();
772	>	final CountDownLatch locked1 = new CountDownLatch(1);
773	>	final CountDownLatch locked2 = new CountDownLatch(1);
774	>	Thread t1 = new Thread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	lock.lock();
777	>	assertFalse(lock.hasWaiters(c));
778	>	assertEquals(0, lock.getWaitQueueLength(c));
779	>	locked1.countDown();
780	>	c.await();
781	>	lock.unlock();
782	>	}});
783	>
784	>	Thread t2 = new Thread(new CheckedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	lock.lock();
787	>	assertTrue(lock.hasWaiters(c));
788	>	assertEquals(1, lock.getWaitQueueLength(c));
789	>	locked2.countDown();
790	>	c.await();
791	>	lock.unlock();
792	>	}});
793	>
794	>	lock.lock();
795	>	assertEquals(0, lock.getWaitQueueLength(c));
796	>	lock.unlock();
797	>
798	>	t1.start();
799	>	await(locked1);
800	>
801	>	lock.lock();
802	>	assertHasWaiters(lock, c, t1);
803	>	assertEquals(1, lock.getWaitQueueLength(c));
804	>	lock.unlock();
805	>
806	>	t2.start();
807	>	await(locked2);
808	>
809	>	lock.lock();
810	>	assertHasWaiters(lock, c, t1, t2);
811	>	assertEquals(2, lock.getWaitQueueLength(c));
812	>	c.signalAll();
813	>	assertHasNoWaiters(lock, c);
814	>	lock.unlock();
815	>
816	>	awaitTermination(t1);
817	>	awaitTermination(t2);
818	>
819	>	assertHasNoWaiters(lock, c);
820		}
821
822	+	/**
823	+	* getWaitingThreads returns only and all waiting threads
824	+	*/
825	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
826	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
827	+	public void testGetWaitingThreads(boolean fair) {
828	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
829	+	final Condition c = lock.newCondition();
830	+	final CountDownLatch locked1 = new CountDownLatch(1);
831	+	final CountDownLatch locked2 = new CountDownLatch(1);
832	+	Thread t1 = new Thread(new CheckedRunnable() {
833	+	public void realRun() throws InterruptedException {
834	+	lock.lock();
835	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
836	+	locked1.countDown();
837	+	c.await();
838	+	lock.unlock();
839	+	}});
840	+
841	+	Thread t2 = new Thread(new CheckedRunnable() {
842	+	public void realRun() throws InterruptedException {
843	+	lock.lock();
844	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
845	+	locked2.countDown();
846	+	c.await();
847	+	lock.unlock();
848	+	}});
849	+
850	+	lock.lock();
851	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
852	+	lock.unlock();
853	+
854	+	t1.start();
855	+	await(locked1);
856	+
857	+	lock.lock();
858	+	assertHasWaiters(lock, c, t1);
859	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
860	+	assertFalse(lock.getWaitingThreads(c).contains(t2));
861	+	assertEquals(1, lock.getWaitingThreads(c).size());
862	+	lock.unlock();
863	+
864	+	t2.start();
865	+	await(locked2);
866	+
867	+	lock.lock();
868	+	assertHasWaiters(lock, c, t1, t2);
869	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
870	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
871	+	assertEquals(2, lock.getWaitingThreads(c).size());
872	+	c.signalAll();
873	+	assertHasNoWaiters(lock, c);
874	+	lock.unlock();
875	+
876	+	awaitTermination(t1);
877	+	awaitTermination(t2);
878	+
879	+	assertHasNoWaiters(lock, c);
880	+	}
881	+
882	+	/**
883	+	* awaitUninterruptibly is uninterruptible
884	+	*/
885	+	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
886	+	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
887	+	public void testAwaitUninterruptibly(boolean fair) {
888	+	final ReentrantLock lock = new ReentrantLock(fair);
889	+	final Condition c = lock.newCondition();
890	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
891	+
892	+	Thread t1 = newStartedThread(new CheckedRunnable() {
893	+	public void realRun() {
894	+	// Interrupt before awaitUninterruptibly
895	+	lock.lock();
896	+	pleaseInterrupt.countDown();
897	+	Thread.currentThread().interrupt();
898	+	c.awaitUninterruptibly();
899	+	assertTrue(Thread.interrupted());
900	+	lock.unlock();
901	+	}});
902	+
903	+	Thread t2 = newStartedThread(new CheckedRunnable() {
904	+	public void realRun() {
905	+	// Interrupt during awaitUninterruptibly
906	+	lock.lock();
907	+	pleaseInterrupt.countDown();
908	+	c.awaitUninterruptibly();
909	+	assertTrue(Thread.interrupted());
910	+	lock.unlock();
911	+	}});
912	+
913	+	await(pleaseInterrupt);
914	+	lock.lock();
915	+	lock.unlock();
916	+	t2.interrupt();
917	+
918	+	assertThreadStaysAlive(t1);
919	+	assertTrue(t2.isAlive());
920	+
921	+	lock.lock();
922	+	c.signalAll();
923	+	lock.unlock();
924	+
925	+	awaitTermination(t1);
926	+	awaitTermination(t2);
927	+	}
928	+
929	+	/**
930	+	* await/awaitNanos/awaitUntil is interruptible
931	+	*/
932	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
933	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
934	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
935	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
936	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
937	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
938	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
939	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
940	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
941	+	final PublicReentrantLock lock =
942	+	new PublicReentrantLock(fair);
943	+	final Condition c = lock.newCondition();
944	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
945	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
946	+	public void realRun() throws InterruptedException {
947	+	lock.lock();
948	+	assertLockedByMoi(lock);
949	+	assertHasNoWaiters(lock, c);
950	+	pleaseInterrupt.countDown();
951	+	try {
952	+	await(c, awaitMethod);
953	+	} finally {
954	+	assertLockedByMoi(lock);
955	+	assertHasNoWaiters(lock, c);
956	+	lock.unlock();
957	+	assertFalse(Thread.interrupted());
958	+	}
959	+	}});
960	+
961	+	await(pleaseInterrupt);
962	+	assertHasWaiters(lock, c, t);
963	+	t.interrupt();
964	+	awaitTermination(t);
965	+	assertNotLocked(lock);
966	+	}
967	+
968	+	/**
969	+	* signalAll wakes up all threads
970	+	*/
971	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
972	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
973	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
974	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
975	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
976	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
977	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
978	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
979	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
980	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
981	+	final Condition c = lock.newCondition();
982	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
983	+	class Awaiter extends CheckedRunnable {
984	+	public void realRun() throws InterruptedException {
985	+	lock.lock();
986	+	pleaseSignal.countDown();
987	+	await(c, awaitMethod);
988	+	lock.unlock();
989	+	}
990	+	}
991	+
992	+	Thread t1 = newStartedThread(new Awaiter());
993	+	Thread t2 = newStartedThread(new Awaiter());
994	+
995	+	await(pleaseSignal);
996	+	lock.lock();
997	+	assertHasWaiters(lock, c, t1, t2);
998	+	c.signalAll();
999	+	assertHasNoWaiters(lock, c);
1000	+	lock.unlock();
1001	+	awaitTermination(t1);
1002	+	awaitTermination(t2);
1003	+	}
1004	+
1005	+	/**
1006	+	* signal wakes up waiting threads in FIFO order
1007	+	*/
1008	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1009	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1010	+	public void testSignalWakesFifo(boolean fair) {
1011	+	final PublicReentrantLock lock =
1012	+	new PublicReentrantLock(fair);
1013	+	final Condition c = lock.newCondition();
1014	+	final CountDownLatch locked1 = new CountDownLatch(1);
1015	+	final CountDownLatch locked2 = new CountDownLatch(1);
1016	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	+	public void realRun() throws InterruptedException {
1018	+	lock.lock();
1019	+	locked1.countDown();
1020	+	c.await();
1021	+	lock.unlock();
1022	+	}});
1023	+
1024	+	await(locked1);
1025	+
1026	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1027	+	public void realRun() throws InterruptedException {
1028	+	lock.lock();
1029	+	locked2.countDown();
1030	+	c.await();
1031	+	lock.unlock();
1032	+	}});
1033	+
1034	+	await(locked2);
1035	+
1036	+	lock.lock();
1037	+	assertHasWaiters(lock, c, t1, t2);
1038	+	assertFalse(lock.hasQueuedThreads());
1039	+	c.signal();
1040	+	assertHasWaiters(lock, c, t2);
1041	+	assertTrue(lock.hasQueuedThread(t1));
1042	+	assertFalse(lock.hasQueuedThread(t2));
1043	+	c.signal();
1044	+	assertHasNoWaiters(lock, c);
1045	+	assertTrue(lock.hasQueuedThread(t1));
1046	+	assertTrue(lock.hasQueuedThread(t2));
1047	+	lock.unlock();
1048	+	awaitTermination(t1);
1049	+	awaitTermination(t2);
1050	+	}
1051	+
1052	+	/**
1053	+	* await after multiple reentrant locking preserves lock count
1054	+	*/
1055	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1056	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1057	+	public void testAwaitLockCount(boolean fair) {
1058	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1059	+	final Condition c = lock.newCondition();
1060	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1061	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1062	+	public void realRun() throws InterruptedException {
1063	+	lock.lock();
1064	+	assertLockedByMoi(lock);
1065	+	assertEquals(1, lock.getHoldCount());
1066	+	pleaseSignal.countDown();
1067	+	c.await();
1068	+	assertLockedByMoi(lock);
1069	+	assertEquals(1, lock.getHoldCount());
1070	+	lock.unlock();
1071	+	}});
1072	+
1073	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1074	+	public void realRun() throws InterruptedException {
1075	+	lock.lock();
1076	+	lock.lock();
1077	+	assertLockedByMoi(lock);
1078	+	assertEquals(2, lock.getHoldCount());
1079	+	pleaseSignal.countDown();
1080	+	c.await();
1081	+	assertLockedByMoi(lock);
1082	+	assertEquals(2, lock.getHoldCount());
1083	+	lock.unlock();
1084	+	lock.unlock();
1085	+	}});
1086	+
1087	+	await(pleaseSignal);
1088	+	lock.lock();
1089	+	assertHasWaiters(lock, c, t1, t2);
1090	+	assertEquals(1, lock.getHoldCount());
1091	+	c.signalAll();
1092	+	assertHasNoWaiters(lock, c);
1093	+	lock.unlock();
1094	+	awaitTermination(t1);
1095	+	awaitTermination(t2);
1096	+	}
1097	+
1098	+	/**
1099	+	* A serialized lock deserializes as unlocked
1100	+	*/
1101	+	public void testSerialization()      { testSerialization(false); }
1102	+	public void testSerialization_fair() { testSerialization(true); }
1103	+	public void testSerialization(boolean fair) {
1104	+	ReentrantLock lock = new ReentrantLock(fair);
1105	+	lock.lock();
1106	+
1107	+	ReentrantLock clone = serialClone(lock);
1108	+	assertEquals(lock.isFair(), clone.isFair());
1109	+	assertTrue(lock.isLocked());
1110	+	assertFalse(clone.isLocked());
1111	+	assertEquals(1, lock.getHoldCount());
1112	+	assertEquals(0, clone.getHoldCount());
1113	+	clone.lock();
1114	+	clone.lock();
1115	+	assertTrue(clone.isLocked());
1116	+	assertEquals(2, clone.getHoldCount());
1117	+	assertEquals(1, lock.getHoldCount());
1118	+	clone.unlock();
1119	+	clone.unlock();
1120	+	assertTrue(lock.isLocked());
1121	+	assertFalse(clone.isLocked());
1122	+	}
1123	+
1124	+	/**
1125	+	* toString indicates current lock state
1126	+	*/
1127	+	public void testToString()      { testToString(false); }
1128	+	public void testToString_fair() { testToString(true); }
1129	+	public void testToString(boolean fair) {
1130	+	ReentrantLock lock = new ReentrantLock(fair);
1131	+	assertTrue(lock.toString().contains("Unlocked"));
1132	+	lock.lock();
1133	+	assertTrue(lock.toString().contains("Locked"));
1134	+	lock.unlock();
1135	+	assertTrue(lock.toString().contains("Unlocked"));
1136	+	}
1137		}

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