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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 1.46 by jsr166, Fri May 13 21:48:59 2011 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
13	+	import java.util.*;
14		import java.io.*;
15
16		public class ReentrantLockTest extends JSR166TestCase {
14	–	static int HOLD_COUNT_TEST_LIMIT = 20;
15	–
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
19	–
20		public static Test suite() {
21	<	return new TestSuite(ReentrantLockTest.class);
21	>	return new TestSuite(ReentrantLockTest.class);
22	>	}
23	>
24	>	/**
25	>	* A runnable calling lockInterruptibly
26	>	*/
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28	>	final ReentrantLock lock;
29	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
30	>	public void realRun() throws InterruptedException {
31	>	lock.lockInterruptibly();
32	>	}
33	>	}
34	>
35	>	/**
36	>	* A runnable calling lockInterruptibly that expects to be
37	>	* interrupted
38	>	*/
39	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40	>	final ReentrantLock lock;
41	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
42	>	public void realRun() throws InterruptedException {
43	>	lock.lockInterruptibly();
44	>	}
45	>	}
46	>
47	>	/**
48	>	* Subclass to expose protected methods
49	>	*/
50	>	static class PublicReentrantLock extends ReentrantLock {
51	>	PublicReentrantLock() { super(); }
52	>	PublicReentrantLock(boolean fair) { super(fair); }
53	>	public Thread getOwner() {
54	>	return super.getOwner();
55	>	}
56	>	public Collection<Thread> getQueuedThreads() {
57	>	return super.getQueuedThreads();
58	>	}
59	>	public Collection<Thread> getWaitingThreads(Condition c) {
60	>	return super.getWaitingThreads(c);
61	>	}
62		}
63
64	<	/*
65	<	* Unlocks an unlocked lock, throws Illegal Monitor State
26	<	*
64	>	/**
65	>	* Releases write lock, checking that it had a hold count of 1.
66		*/
67	<	public void testIllegalMonitorStateException(){
68	<	ReentrantLock rl = new ReentrantLock();
69	<	try{
70	<	rl.unlock();
71	<	fail("Should of thown Illegal Monitor State Exception");
67	>	void releaseLock(PublicReentrantLock lock) {
68	>	assertLockedByMoi(lock);
69	>	lock.unlock();
70	>	assertFalse(lock.isHeldByCurrentThread());
71	>	assertNotLocked(lock);
72	>	}
73
74	<	} catch(IllegalMonitorStateException success){}
74	>	/**
75	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
76	>	*/
77	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
78	>	long startTime = System.nanoTime();
79	>	while (!lock.hasQueuedThread(t)) {
80	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
81	>	throw new AssertionError("timed out");
82	>	Thread.yield();
83	>	}
84	>	assertTrue(t.isAlive());
85	>	assertTrue(lock.getOwner() != t);
86	>	}
87
88	+	/**
89	+	* Checks that lock is not locked.
90	+	*/
91	+	void assertNotLocked(PublicReentrantLock lock) {
92	+	assertFalse(lock.isLocked());
93	+	assertFalse(lock.isHeldByCurrentThread());
94	+	assertNull(lock.getOwner());
95	+	assertEquals(0, lock.getHoldCount());
96	+	}
97
98	+	/**
99	+	* Checks that lock is locked by the given thread.
100	+	*/
101	+	void assertLockedBy(PublicReentrantLock lock, Thread t) {
102	+	assertTrue(lock.isLocked());
103	+	assertSame(t, lock.getOwner());
104	+	assertEquals(t == Thread.currentThread(),
105	+	lock.isHeldByCurrentThread());
106	+	assertEquals(t == Thread.currentThread(),
107	+	lock.getHoldCount() > 0);
108		}
109	<
110	<	/*
111	<	* 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.
109	>
110	>	/**
111	>	* Checks that lock is locked by the current thread.
112		*/
113	+	void assertLockedByMoi(PublicReentrantLock lock) {
114	+	assertLockedBy(lock, Thread.currentThread());
115	+	}
116
117	<	public void testInterruptedException(){
118	<	final ReentrantLock lock = new ReentrantLock();
119	<	lock.lock();
120	<	Thread t = new Thread(new Runnable() {
121	<	public void run(){
122	<	try{
123	<	lock.lockInterruptibly();
124	<	threadFail("should throw");
125	<	} catch(InterruptedException success){}
126	<	}
127	<	});
117	>	/**
118	>	* Checks that condition c has no waiters.
119	>	*/
120	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
121	>	assertHasWaiters(lock, c, new Thread[] {});
122	>	}
123	>
124	>	/**
125	>	* Checks that condition c has exactly the given waiter threads.
126	>	*/
127	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
128	>	Thread... threads) {
129	>	lock.lock();
130	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
131	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
132	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
133	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
134	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
135	>	new HashSet<Thread>(Arrays.asList(threads)));
136	>	lock.unlock();
137	>	}
138	>
139	>	enum AwaitMethod { await, awaitNanos, awaitUntil };
140	>
141	>	/**
142	>	* Awaits condition using the specified AwaitMethod.
143	>	*/
144	>	void await(Condition c, AwaitMethod awaitMethod)
145	>	throws InterruptedException {
146	>	switch (awaitMethod) {
147	>	case await:
148	>	c.await();
149	>	break;
150	>	case awaitNanos:
151	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
152	>	assertTrue(nanosRemaining > 0);
153	>	break;
154	>	case awaitUntil:
155	>	java.util.Date d = new java.util.Date();
156	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
157	>	break;
158	>	}
159	>	}
160	>
161	>	/**
162	>	* Constructor sets given fairness, and is in unlocked state
163	>	*/
164	>	public void testConstructor() {
165	>	PublicReentrantLock lock;
166	>
167	>	lock = new PublicReentrantLock();
168	>	assertFalse(lock.isFair());
169	>	assertNotLocked(lock);
170	>
171	>	lock = new PublicReentrantLock(true);
172	>	assertTrue(lock.isFair());
173	>	assertNotLocked(lock);
174	>
175	>	lock = new PublicReentrantLock(false);
176	>	assertFalse(lock.isFair());
177	>	assertNotLocked(lock);
178	>	}
179	>
180	>	/**
181	>	* locking an unlocked lock succeeds
182	>	*/
183	>	public void testLock()      { testLock(false); }
184	>	public void testLock_fair() { testLock(true); }
185	>	public void testLock(boolean fair) {
186	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
187	>	lock.lock();
188	>	assertLockedByMoi(lock);
189	>	releaseLock(lock);
190	>	}
191	>
192	>	/**
193	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
194	>	*/
195	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
196	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
197	>	public void testUnlock_IMSE(boolean fair) {
198	>	ReentrantLock lock = new ReentrantLock(fair);
199		try {
57	–	t.start();
58	–	t.interrupt();
200		lock.unlock();
201	<	t.join();
202	<	} catch(Exception e){
203	<	fail("unexpected exception");
204	<	}
205	<	}
206	<
207	<	/*
208	<	* tests for interrupted exception on a timed wait
209	<	*
210	<	*/
211	<
212	<
213	<	public void testInterruptedException2(){
214	<	final ReentrantLock lock = new ReentrantLock();
215	<	lock.lock();
216	<	Thread t = new Thread(new Runnable() {
217	<	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	<	}
201	>	shouldThrow();
202	>	} catch (IllegalMonitorStateException success) {}
203	>	}
204	>
205	>	/**
206	>	* tryLock on an unlocked lock succeeds
207	>	*/
208	>	public void testTryLock()      { testTryLock(false); }
209	>	public void testTryLock_fair() { testTryLock(true); }
210	>	public void testTryLock(boolean fair) {
211	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
212	>	assertTrue(lock.tryLock());
213	>	assertLockedByMoi(lock);
214	>	assertTrue(lock.tryLock());
215	>	assertLockedByMoi(lock);
216	>	lock.unlock();
217	>	releaseLock(lock);
218		}
219
220	+	/**
221	+	* hasQueuedThreads reports whether there are waiting threads
222	+	*/
223	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
224	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
225	+	public void testHasQueuedThreads(boolean fair) {
226	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
227	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
228	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
229	+	assertFalse(lock.hasQueuedThreads());
230	+	lock.lock();
231	+	assertFalse(lock.hasQueuedThreads());
232	+	t1.start();
233	+	waitForQueuedThread(lock, t1);
234	+	assertTrue(lock.hasQueuedThreads());
235	+	t2.start();
236	+	waitForQueuedThread(lock, t2);
237	+	assertTrue(lock.hasQueuedThreads());
238	+	t1.interrupt();
239	+	awaitTermination(t1);
240	+	assertTrue(lock.hasQueuedThreads());
241	+	lock.unlock();
242	+	awaitTermination(t2);
243	+	assertFalse(lock.hasQueuedThreads());
244	+	}
245
246	<	public void testTryLockWhenLocked() {
247	<	final ReentrantLock lock = new ReentrantLock();
248	<	lock.lock();
249	<	Thread t = new Thread(new Runnable() {
250	<	public void run(){
251	<	threadAssertFalse(lock.tryLock());
252	<	}
253	<	});
246	>	/**
247	>	* getQueueLength reports number of waiting threads
248	>	*/
249	>	public void testGetQueueLength()      { testGetQueueLength(false); }
250	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
251	>	public void testGetQueueLength(boolean fair) {
252	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
253	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
254	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
255	>	assertEquals(0, lock.getQueueLength());
256	>	lock.lock();
257	>	t1.start();
258	>	waitForQueuedThread(lock, t1);
259	>	assertEquals(1, lock.getQueueLength());
260	>	t2.start();
261	>	waitForQueuedThread(lock, t2);
262	>	assertEquals(2, lock.getQueueLength());
263	>	t1.interrupt();
264	>	awaitTermination(t1);
265	>	assertEquals(1, lock.getQueueLength());
266	>	lock.unlock();
267	>	awaitTermination(t2);
268	>	assertEquals(0, lock.getQueueLength());
269	>	}
270	>
271	>	/**
272	>	* hasQueuedThread(null) throws NPE
273	>	*/
274	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
275	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
276	>	public void testHasQueuedThreadNPE(boolean fair) {
277	>	final ReentrantLock lock = new ReentrantLock(fair);
278		try {
279	<	t.start();
280	<	t.join();
279	>	lock.hasQueuedThread(null);
280	>	shouldThrow();
281	>	} catch (NullPointerException success) {}
282	>	}
283	>
284	>	/**
285	>	* hasQueuedThread reports whether a thread is queued.
286	>	*/
287	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
288	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
289	>	public void testHasQueuedThread(boolean fair) {
290	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
291	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
292	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
293	>	assertFalse(lock.hasQueuedThread(t1));
294	>	assertFalse(lock.hasQueuedThread(t2));
295	>	lock.lock();
296	>	t1.start();
297	>	waitForQueuedThread(lock, t1);
298	>	assertTrue(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	t2.start();
301	>	waitForQueuedThread(lock, t2);
302	>	assertTrue(lock.hasQueuedThread(t1));
303	>	assertTrue(lock.hasQueuedThread(t2));
304	>	t1.interrupt();
305	>	awaitTermination(t1);
306	>	assertFalse(lock.hasQueuedThread(t1));
307	>	assertTrue(lock.hasQueuedThread(t2));
308	>	lock.unlock();
309	>	awaitTermination(t2);
310	>	assertFalse(lock.hasQueuedThread(t1));
311	>	assertFalse(lock.hasQueuedThread(t2));
312	>	}
313	>
314	>	/**
315	>	* getQueuedThreads includes waiting threads
316	>	*/
317	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
318	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
319	>	public void testGetQueuedThreads(boolean fair) {
320	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
321	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
322	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
323	>	assertTrue(lock.getQueuedThreads().isEmpty());
324	>	lock.lock();
325	>	assertTrue(lock.getQueuedThreads().isEmpty());
326	>	t1.start();
327	>	waitForQueuedThread(lock, t1);
328	>	assertEquals(1, lock.getQueuedThreads().size());
329	>	assertTrue(lock.getQueuedThreads().contains(t1));
330	>	t2.start();
331	>	waitForQueuedThread(lock, t2);
332	>	assertEquals(2, lock.getQueuedThreads().size());
333	>	assertTrue(lock.getQueuedThreads().contains(t1));
334	>	assertTrue(lock.getQueuedThreads().contains(t2));
335	>	t1.interrupt();
336	>	awaitTermination(t1);
337	>	assertFalse(lock.getQueuedThreads().contains(t1));
338	>	assertTrue(lock.getQueuedThreads().contains(t2));
339	>	assertEquals(1, lock.getQueuedThreads().size());
340	>	lock.unlock();
341	>	awaitTermination(t2);
342	>	assertTrue(lock.getQueuedThreads().isEmpty());
343	>	}
344	>
345	>	/**
346	>	* timed tryLock is interruptible.
347	>	*/
348	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
349	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
350	>	public void testTryLock_Interruptible(boolean fair) {
351	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
352	>	lock.lock();
353	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
354	>	public void realRun() throws InterruptedException {
355	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
356	>	}});
357	>
358	>	waitForQueuedThread(lock, t);
359	>	t.interrupt();
360	>	awaitTermination(t);
361	>	releaseLock(lock);
362	>	}
363	>
364	>	/**
365	>	* tryLock on a locked lock fails
366	>	*/
367	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
368	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
369	>	public void testTryLockWhenLocked(boolean fair) {
370	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
371	>	lock.lock();
372	>	Thread t = newStartedThread(new CheckedRunnable() {
373	>	public void realRun() {
374	>	assertFalse(lock.tryLock());
375	>	}});
376	>
377	>	awaitTermination(t);
378	>	releaseLock(lock);
379	>	}
380	>
381	>	/**
382	>	* Timed tryLock on a locked lock times out
383	>	*/
384	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
385	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
386	>	public void testTryLock_Timeout(boolean fair) {
387	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
388	>	lock.lock();
389	>	Thread t = newStartedThread(new CheckedRunnable() {
390	>	public void realRun() throws InterruptedException {
391	>	long startTime = System.nanoTime();
392	>	long timeoutMillis = 10;
393	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
394	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
395	>	}});
396	>
397	>	awaitTermination(t);
398	>	releaseLock(lock);
399	>	}
400	>
401	>	/**
402	>	* getHoldCount returns number of recursive holds
403	>	*/
404	>	public void testGetHoldCount()      { testGetHoldCount(false); }
405	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
406	>	public void testGetHoldCount(boolean fair) {
407	>	ReentrantLock lock = new ReentrantLock(fair);
408	>	for (int i = 1; i <= SIZE; i++) {
409	>	lock.lock();
410	>	assertEquals(i, lock.getHoldCount());
411	>	}
412	>	for (int i = SIZE; i > 0; i--) {
413		lock.unlock();
414	<	} catch(Exception e){
105	<	fail("unexpected exception");
414	>	assertEquals(i-1, lock.getHoldCount());
415		}
416	<	}
416	>	}
417
418	<	public void testTryLock_Timeout(){
419	<	final ReentrantLock lock = new ReentrantLock();
420	<	lock.lock();
421	<	Thread t = new Thread(new Runnable() {
422	<	public void run(){
423	<	try {
115	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
116	<	} catch (Exception ex) {
117	<	threadFail("unexpected exception");
118	<	}
119	<	}
120	<	});
418	>	/**
419	>	* isLocked is true when locked and false when not
420	>	*/
421	>	public void testIsLocked()      { testIsLocked(false); }
422	>	public void testIsLocked_fair() { testIsLocked(true); }
423	>	public void testIsLocked(boolean fair) {
424		try {
425	<	t.start();
426	<	t.join();
425	>	final ReentrantLock lock = new ReentrantLock(fair);
426	>	assertFalse(lock.isLocked());
427	>	lock.lock();
428	>	assertTrue(lock.isLocked());
429	>	lock.lock();
430	>	assertTrue(lock.isLocked());
431		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);
432		assertTrue(lock.isLocked());
433	<	t.join();
433	>	lock.unlock();
434		assertFalse(lock.isLocked());
435	<	} catch(Exception e){
436	<	fail("unexpected exception");
435	>	final CyclicBarrier barrier = new CyclicBarrier(2);
436	>	Thread t = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() throws Exception {
438	>	lock.lock();
439	>	assertTrue(lock.isLocked());
440	>	barrier.await();
441	>	barrier.await();
442	>	lock.unlock();
443	>	}});
444	>
445	>	barrier.await();
446	>	assertTrue(lock.isLocked());
447	>	barrier.await();
448	>	awaitTermination(t);
449	>	assertFalse(lock.isLocked());
450	>	} catch (Exception e) {
451	>	threadUnexpectedException(e);
452		}
453		}
454
455	<
456	<	public void testLockInterruptibly() {
457	<	final ReentrantLock lock = new ReentrantLock();
458	<	try {
459	<	lock.lockInterruptibly();
460	<	} catch(Exception e) {
461	<	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	<	});
455	>	/**
456	>	* lockInterruptibly succeeds when unlocked, else is interruptible
457	>	*/
458	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
459	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
460	>	public void testLockInterruptibly(boolean fair) {
461	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
462		try {
463	<	t.start();
464	<	t.interrupt();
465	<	assertTrue(lock.isLocked());
195	<	assertTrue(lock.isHeldByCurrentThread());
196	<	t.join();
197	<	} catch(Exception e){
198	<	fail("unexpected exception");
463	>	lock.lockInterruptibly();
464	>	} catch (InterruptedException ie) {
465	>	threadUnexpectedException(ie);
466		}
467	+	assertLockedByMoi(lock);
468	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
469	+	waitForQueuedThread(lock, t);
470	+	t.interrupt();
471	+	assertTrue(lock.isLocked());
472	+	assertTrue(lock.isHeldByCurrentThread());
473	+	awaitTermination(t);
474	+	releaseLock(lock);
475		}
476
477	<	public void testAwait_IllegalMonitor() {
478	<	final ReentrantLock lock = new ReentrantLock();
477	>	/**
478	>	* Calling await without holding lock throws IllegalMonitorStateException
479	>	*/
480	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
481	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
482	>	public void testAwait_IMSE(boolean fair) {
483	>	final ReentrantLock lock = new ReentrantLock(fair);
484		final Condition c = lock.newCondition();
485	+	long startTime = System.nanoTime();
486		try {
487	<	c.await();
488	<	fail("should throw");
489	<	}
490	<	catch (IllegalMonitorStateException success) {
491	<	}
492	<	catch (Exception ex) {
493	<	fail("should throw IMSE");
487	>	try {
488	>	c.await();
489	>	shouldThrow();
490	>	} catch (IllegalMonitorStateException success) {}
491	>	try {
492	>	c.await(LONG_DELAY_MS, MILLISECONDS);
493	>	shouldThrow();
494	>	} catch (IllegalMonitorStateException success) {}
495	>	try {
496	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
497	>	shouldThrow();
498	>	} catch (IllegalMonitorStateException success) {}
499	>	try {
500	>	c.awaitUninterruptibly();
501	>	shouldThrow();
502	>	} catch (IllegalMonitorStateException success) {}
503	>	} catch (InterruptedException ie) {
504	>	threadUnexpectedException(ie);
505		}
506	+	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
507		}
508
509	<	public void testSignal_IllegalMonitor() {
510	<	final ReentrantLock lock = new ReentrantLock();
509	>	/**
510	>	* Calling signal without holding lock throws IllegalMonitorStateException
511	>	*/
512	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
513	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
514	>	public void testSignal_IMSE(boolean fair) {
515	>	final ReentrantLock lock = new ReentrantLock(fair);
516		final Condition c = lock.newCondition();
517		try {
518		c.signal();
519	<	fail("should throw");
520	<	}
223	<	catch (IllegalMonitorStateException success) {
224	<	}
225	<	catch (Exception ex) {
226	<	fail("should throw IMSE");
227	<	}
519	>	shouldThrow();
520	>	} catch (IllegalMonitorStateException success) {}
521		}
522
523	<	public void testAwaitNanos_Timeout() {
524	<	final ReentrantLock lock = new ReentrantLock();
525	<	final Condition c = lock.newCondition();
523	>	/**
524	>	* awaitNanos without a signal times out
525	>	*/
526	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
527	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
528	>	public void testAwaitNanos_Timeout(boolean fair) {
529		try {
530	+	final ReentrantLock lock = new ReentrantLock(fair);
531	+	final Condition c = lock.newCondition();
532		lock.lock();
533	<	long t = c.awaitNanos(100);
534	<	assertTrue(t <= 0);
533	>	long startTime = System.nanoTime();
534	>	long timeoutMillis = 10;
535	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
536	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
537	>	assertTrue(nanosRemaining <= 0);
538	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
539		lock.unlock();
540	<	}
541	<	catch (Exception ex) {
240	<	fail("unexpected exception");
540	>	} catch (InterruptedException e) {
541	>	threadUnexpectedException(e);
542		}
543		}
544
545	<	public void testAwait_Timeout() {
546	<	final ReentrantLock lock = new ReentrantLock();
547	<	final Condition c = lock.newCondition();
545	>	/**
546	>	* timed await without a signal times out
547	>	*/
548	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
549	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
550	>	public void testAwait_Timeout(boolean fair) {
551		try {
552	+	final ReentrantLock lock = new ReentrantLock(fair);
553	+	final Condition c = lock.newCondition();
554		lock.lock();
555	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
555	>	long startTime = System.nanoTime();
556	>	long timeoutMillis = 10;
557	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
558	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
559		lock.unlock();
560	<	}
561	<	catch (Exception ex) {
253	<	fail("unexpected exception");
560	>	} catch (InterruptedException e) {
561	>	threadUnexpectedException(e);
562		}
563		}
564
565	<	public void testAwaitUntil_Timeout() {
566	<	final ReentrantLock lock = new ReentrantLock();
567	<	final Condition c = lock.newCondition();
565	>	/**
566	>	* awaitUntil without a signal times out
567	>	*/
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		try {
572	+	final ReentrantLock lock = new ReentrantLock(fair);
573	+	final Condition c = lock.newCondition();
574		lock.lock();
575	+	long startTime = System.nanoTime();
576	+	long timeoutMillis = 10;
577		java.util.Date d = new java.util.Date();
578	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
578	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
579	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
580		lock.unlock();
581	<	}
582	<	catch (Exception ex) {
267	<	fail("unexpected exception");
581	>	} catch (InterruptedException e) {
582	>	threadUnexpectedException(e);
583		}
584		}
585
586	<	public void testAwait() {
587	<	final ReentrantLock lock = new ReentrantLock();
586	>	/**
587	>	* await returns when signalled
588	>	*/
589	>	public void testAwait()      { testAwait(false); }
590	>	public void testAwait_fair() { testAwait(true); }
591	>	public void testAwait(boolean fair) {
592	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
593		final Condition c = lock.newCondition();
594	<	Thread t = new Thread(new Runnable() {
595	<	public void run() {
596	<	try {
597	<	lock.lock();
598	<	c.await();
599	<	lock.unlock();
600	<	}
601	<	catch(InterruptedException e) {
602	<	threadFail("unexpected exception");
603	<	}
604	<	}
605	<	});
594	>	final CountDownLatch locked = new CountDownLatch(1);
595	>	Thread t = newStartedThread(new CheckedRunnable() {
596	>	public void realRun() throws InterruptedException {
597	>	lock.lock();
598	>	locked.countDown();
599	>	c.await();
600	>	lock.unlock();
601	>	}});
602	>
603	>	await(locked);
604	>	lock.lock();
605	>	assertHasWaiters(lock, c, t);
606	>	c.signal();
607	>	assertHasNoWaiters(lock, c);
608	>	assertTrue(t.isAlive());
609	>	lock.unlock();
610	>	awaitTermination(t);
611	>	}
612
613	+	/**
614	+	* hasWaiters throws NPE if null
615	+	*/
616	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
617	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
618	+	public void testHasWaitersNPE(boolean fair) {
619	+	final ReentrantLock lock = new ReentrantLock(fair);
620		try {
621	<	t.start();
622	<	Thread.sleep(SHORT_DELAY_MS);
623	<	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	<	}
621	>	lock.hasWaiters(null);
622	>	shouldThrow();
623	>	} catch (NullPointerException success) {}
624		}
625
626	<	public void testAwaitUninterruptibly() {
627	<	final ReentrantLock lock = new ReentrantLock();
628	<	final Condition c = lock.newCondition();
629	<	Thread t = new Thread(new Runnable() {
630	<	public void run() {
631	<	lock.lock();
632	<	c.awaitUninterruptibly();
633	<	lock.unlock();
634	<	}
635	<	});
626	>	/**
627	>	* getWaitQueueLength throws NPE if null
628	>	*/
629	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
630	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
631	>	public void testGetWaitQueueLengthNPE(boolean fair) {
632	>	final ReentrantLock lock = new ReentrantLock(fair);
633	>	try {
634	>	lock.getWaitQueueLength(null);
635	>	shouldThrow();
636	>	} catch (NullPointerException success) {}
637	>	}
638
639	+	/**
640	+	* getWaitingThreads throws NPE if null
641	+	*/
642	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
643	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
644	+	public void testGetWaitingThreadsNPE(boolean fair) {
645	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
646		try {
647	<	t.start();
648	<	Thread.sleep(SHORT_DELAY_MS);
649	<	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	<	}
647	>	lock.getWaitingThreads(null);
648	>	shouldThrow();
649	>	} catch (NullPointerException success) {}
650		}
651
652	<	public void testAwait_Interrupt() {
653	<	final ReentrantLock lock = new ReentrantLock();
652	>	/**
653	>	* hasWaiters throws IllegalArgumentException if not owned
654	>	*/
655	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
656	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
657	>	public void testHasWaitersIAE(boolean fair) {
658	>	final ReentrantLock lock = new ReentrantLock(fair);
659		final Condition c = lock.newCondition();
660	<	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	<
660	>	final ReentrantLock lock2 = new ReentrantLock(fair);
661		try {
662	<	t.start();
663	<	Thread.sleep(SHORT_DELAY_MS);
664	<	t.interrupt();
347	<	t.join(SHORT_DELAY_MS);
348	<	assertFalse(t.isAlive());
349	<	}
350	<	catch (Exception ex) {
351	<	fail("unexpected exception");
352	<	}
662	>	lock2.hasWaiters(c);
663	>	shouldThrow();
664	>	} catch (IllegalArgumentException success) {}
665		}
666
667	<	public void testAwaitNanos_Interrupt() {
668	<	final ReentrantLock lock = new ReentrantLock();
667	>	/**
668	>	* hasWaiters throws IllegalMonitorStateException if not locked
669	>	*/
670	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
671	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
672	>	public void testHasWaitersIMSE(boolean fair) {
673	>	final ReentrantLock lock = new ReentrantLock(fair);
674		final Condition c = lock.newCondition();
675	<	Thread t = new Thread(new Runnable() {
676	<	public void run() {
677	<	try {
678	<	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	<	}
675	>	try {
676	>	lock.hasWaiters(c);
677	>	shouldThrow();
678	>	} catch (IllegalMonitorStateException success) {}
679		}
680
681	<	public void testAwaitUntil_Interrupt() {
682	<	final ReentrantLock lock = new ReentrantLock();
683	<	final Condition c = lock.newCondition();
684	<	Thread t = new Thread(new Runnable() {
685	<	public void run() {
686	<	try {
687	<	lock.lock();
688	<	java.util.Date d = new java.util.Date();
689	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
690	<	lock.unlock();
691	<	threadFail("should throw");
692	<	}
693	<	catch(InterruptedException success) {
694	<	}
397	<	}
398	<	});
681	>	/**
682	>	* getWaitQueueLength throws IllegalArgumentException if not owned
683	>	*/
684	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
685	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
686	>	public void testGetWaitQueueLengthIAE(boolean fair) {
687	>	final ReentrantLock lock = new ReentrantLock(fair);
688	>	final Condition c = lock.newCondition();
689	>	final ReentrantLock lock2 = new ReentrantLock(fair);
690	>	try {
691	>	lock2.getWaitQueueLength(c);
692	>	shouldThrow();
693	>	} catch (IllegalArgumentException success) {}
694	>	}
695
696	+	/**
697	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
698	+	*/
699	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
700	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
701	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
702	+	final ReentrantLock lock = new ReentrantLock(fair);
703	+	final Condition c = lock.newCondition();
704		try {
705	<	t.start();
706	<	Thread.sleep(SHORT_DELAY_MS);
707	<	t.interrupt();
404	<	t.join(SHORT_DELAY_MS);
405	<	assertFalse(t.isAlive());
406	<	}
407	<	catch (Exception ex) {
408	<	fail("unexpected exception");
409	<	}
705	>	lock.getWaitQueueLength(c);
706	>	shouldThrow();
707	>	} catch (IllegalMonitorStateException success) {}
708		}
709
710	<	public void testSignalAll() {
711	<	final ReentrantLock lock = new ReentrantLock();
710	>	/**
711	>	* getWaitingThreads throws IllegalArgumentException if not owned
712	>	*/
713	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
714	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
715	>	public void testGetWaitingThreadsIAE(boolean fair) {
716	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
717		final Condition c = lock.newCondition();
718	<	Thread t1 = new Thread(new Runnable() {
719	<	public void run() {
720	<	try {
721	<	lock.lock();
722	<	c.await();
723	<	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	<	});
718	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
719	>	try {
720	>	lock2.getWaitingThreads(c);
721	>	shouldThrow();
722	>	} catch (IllegalArgumentException success) {}
723	>	}
724
725	+	/**
726	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
727	+	*/
728	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
729	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
730	+	public void testGetWaitingThreadsIMSE(boolean fair) {
731	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
732	+	final Condition c = lock.newCondition();
733		try {
734	<	t1.start();
735	<	t2.start();
736	<	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	<	}
734	>	lock.getWaitingThreads(c);
735	>	shouldThrow();
736	>	} catch (IllegalMonitorStateException success) {}
737		}
738
739	<	public void testSerialization() {
740	<	ReentrantLock l = new ReentrantLock();
741	<	l.lock();
742	<	l.unlock();
743	<
744	<	try {
745	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
746	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
747	<	out.writeObject(l);
748	<	out.close();
749	<
750	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
751	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
752	<	ReentrantLock r = (ReentrantLock) in.readObject();
753	<	r.lock();
754	<	r.unlock();
755	<	} catch(Exception e){
756	<	e.printStackTrace();
757	<	fail("unexpected exception");
758	<	}
739	>	/**
740	>	* hasWaiters returns true when a thread is waiting, else false
741	>	*/
742	>	public void testHasWaiters()      { testHasWaiters(false); }
743	>	public void testHasWaiters_fair() { testHasWaiters(true); }
744	>	public void testHasWaiters(boolean fair) {
745	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
746	>	final Condition c = lock.newCondition();
747	>	final CountDownLatch locked = new CountDownLatch(1);
748	>	Thread t = newStartedThread(new CheckedRunnable() {
749	>	public void realRun() throws InterruptedException {
750	>	lock.lock();
751	>	assertHasNoWaiters(lock, c);
752	>	assertFalse(lock.hasWaiters(c));
753	>	locked.countDown();
754	>	c.await();
755	>	assertHasNoWaiters(lock, c);
756	>	assertFalse(lock.hasWaiters(c));
757	>	lock.unlock();
758	>	}});
759	>
760	>	await(locked);
761	>	lock.lock();
762	>	assertHasWaiters(lock, c, t);
763	>	assertTrue(lock.hasWaiters(c));
764	>	c.signal();
765	>	assertHasNoWaiters(lock, c);
766	>	assertFalse(lock.hasWaiters(c));
767	>	lock.unlock();
768	>	awaitTermination(t);
769	>	assertHasNoWaiters(lock, c);
770		}
771
772	+	/**
773	+	* getWaitQueueLength returns number of waiting threads
774	+	*/
775	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
776	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
777	+	public void testGetWaitQueueLength(boolean fair) {
778	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
779	+	final Condition c = lock.newCondition();
780	+	final CountDownLatch locked1 = new CountDownLatch(1);
781	+	final CountDownLatch locked2 = new CountDownLatch(1);
782	+	Thread t1 = new Thread(new CheckedRunnable() {
783	+	public void realRun() throws InterruptedException {
784	+	lock.lock();
785	+	assertFalse(lock.hasWaiters(c));
786	+	assertEquals(0, lock.getWaitQueueLength(c));
787	+	locked1.countDown();
788	+	c.await();
789	+	lock.unlock();
790	+	}});
791	+
792	+	Thread t2 = new Thread(new CheckedRunnable() {
793	+	public void realRun() throws InterruptedException {
794	+	lock.lock();
795	+	assertTrue(lock.hasWaiters(c));
796	+	assertEquals(1, lock.getWaitQueueLength(c));
797	+	locked2.countDown();
798	+	c.await();
799	+	lock.unlock();
800	+	}});
801	+
802	+	lock.lock();
803	+	assertEquals(0, lock.getWaitQueueLength(c));
804	+	lock.unlock();
805	+
806	+	t1.start();
807	+	await(locked1);
808	+
809	+	lock.lock();
810	+	assertHasWaiters(lock, c, t1);
811	+	assertEquals(1, lock.getWaitQueueLength(c));
812	+	lock.unlock();
813	+
814	+	t2.start();
815	+	await(locked2);
816	+
817	+	lock.lock();
818	+	assertHasWaiters(lock, c, t1, t2);
819	+	assertEquals(2, lock.getWaitQueueLength(c));
820	+	c.signalAll();
821	+	assertHasNoWaiters(lock, c);
822	+	lock.unlock();
823	+
824	+	awaitTermination(t1);
825	+	awaitTermination(t2);
826	+
827	+	assertHasNoWaiters(lock, c);
828	+	}
829	+
830	+	/**
831	+	* getWaitingThreads returns only and all waiting threads
832	+	*/
833	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
834	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
835	+	public void testGetWaitingThreads(boolean fair) {
836	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
837	+	final Condition c = lock.newCondition();
838	+	final CountDownLatch locked1 = new CountDownLatch(1);
839	+	final CountDownLatch locked2 = new CountDownLatch(1);
840	+	Thread t1 = new Thread(new CheckedRunnable() {
841	+	public void realRun() throws InterruptedException {
842	+	lock.lock();
843	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
844	+	locked1.countDown();
845	+	c.await();
846	+	lock.unlock();
847	+	}});
848	+
849	+	Thread t2 = new Thread(new CheckedRunnable() {
850	+	public void realRun() throws InterruptedException {
851	+	lock.lock();
852	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
853	+	locked2.countDown();
854	+	c.await();
855	+	lock.unlock();
856	+	}});
857	+
858	+	lock.lock();
859	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
860	+	lock.unlock();
861	+
862	+	t1.start();
863	+	await(locked1);
864	+
865	+	lock.lock();
866	+	assertHasWaiters(lock, c, t1);
867	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
868	+	assertFalse(lock.getWaitingThreads(c).contains(t2));
869	+	assertEquals(1, lock.getWaitingThreads(c).size());
870	+	lock.unlock();
871	+
872	+	t2.start();
873	+	await(locked2);
874	+
875	+	lock.lock();
876	+	assertHasWaiters(lock, c, t1, t2);
877	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
878	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
879	+	assertEquals(2, lock.getWaitingThreads(c).size());
880	+	c.signalAll();
881	+	assertHasNoWaiters(lock, c);
882	+	lock.unlock();
883	+
884	+	awaitTermination(t1);
885	+	awaitTermination(t2);
886	+
887	+	assertHasNoWaiters(lock, c);
888	+	}
889	+
890	+	/**
891	+	* awaitUninterruptibly doesn't abort on interrupt
892	+	*/
893	+	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
894	+	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
895	+	public void testAwaitUninterruptibly(boolean fair) {
896	+	final ReentrantLock lock = new ReentrantLock(fair);
897	+	final Condition c = lock.newCondition();
898	+	final CountDownLatch locked = new CountDownLatch(1);
899	+	Thread t = newStartedThread(new CheckedRunnable() {
900	+	public void realRun() {
901	+	lock.lock();
902	+	locked.countDown();
903	+	c.awaitUninterruptibly();
904	+	assertTrue(Thread.interrupted());
905	+	lock.unlock();
906	+	}});
907	+
908	+	await(locked);
909	+	lock.lock();
910	+	lock.unlock();
911	+	t.interrupt();
912	+	long timeoutMillis = 10;
913	+	assertThreadStaysAlive(t, timeoutMillis);
914	+	lock.lock();
915	+	c.signal();
916	+	lock.unlock();
917	+	awaitTermination(t);
918	+	}
919	+
920	+	/**
921	+	* await/awaitNanos/awaitUntil is interruptible
922	+	*/
923	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
924	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
925	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
926	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
927	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
928	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
929	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
930	+	final PublicReentrantLock lock =
931	+	new PublicReentrantLock(fair);
932	+	final Condition c = lock.newCondition();
933	+	final CountDownLatch locked = new CountDownLatch(1);
934	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
935	+	public void realRun() throws InterruptedException {
936	+	lock.lock();
937	+	assertLockedByMoi(lock);
938	+	assertHasNoWaiters(lock, c);
939	+	locked.countDown();
940	+	try {
941	+	await(c, awaitMethod);
942	+	} finally {
943	+	assertLockedByMoi(lock);
944	+	assertHasNoWaiters(lock, c);
945	+	lock.unlock();
946	+	assertFalse(Thread.interrupted());
947	+	}
948	+	}});
949	+
950	+	await(locked);
951	+	assertHasWaiters(lock, c, t);
952	+	t.interrupt();
953	+	awaitTermination(t);
954	+	assertNotLocked(lock);
955	+	}
956	+
957	+	/**
958	+	* signalAll wakes up all threads
959	+	*/
960	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
961	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
962	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
963	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
964	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
965	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
966	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
967	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
968	+	final Condition c = lock.newCondition();
969	+	final CountDownLatch locked = new CountDownLatch(2);
970	+	class Awaiter extends CheckedRunnable {
971	+	public void realRun() throws InterruptedException {
972	+	lock.lock();
973	+	locked.countDown();
974	+	await(c, awaitMethod);
975	+	lock.unlock();
976	+	}
977	+	}
978	+
979	+	Thread t1 = newStartedThread(new Awaiter());
980	+	Thread t2 = newStartedThread(new Awaiter());
981	+
982	+	await(locked);
983	+	lock.lock();
984	+	assertHasWaiters(lock, c, t1, t2);
985	+	c.signalAll();
986	+	assertHasNoWaiters(lock, c);
987	+	lock.unlock();
988	+	awaitTermination(t1);
989	+	awaitTermination(t2);
990	+	}
991	+
992	+	/**
993	+	* signal wakes up waiting threads in FIFO order.
994	+	*/
995	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
996	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
997	+	public void testSignalWakesFifo(boolean fair) {
998	+	final PublicReentrantLock lock =
999	+	new PublicReentrantLock(fair);
1000	+	final Condition c = lock.newCondition();
1001	+	final CountDownLatch locked1 = new CountDownLatch(1);
1002	+	final CountDownLatch locked2 = new CountDownLatch(1);
1003	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1004	+	public void realRun() throws InterruptedException {
1005	+	lock.lock();
1006	+	locked1.countDown();
1007	+	c.await();
1008	+	lock.unlock();
1009	+	}});
1010	+
1011	+	await(locked1);
1012	+
1013	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1014	+	public void realRun() throws InterruptedException {
1015	+	lock.lock();
1016	+	locked2.countDown();
1017	+	c.await();
1018	+	lock.unlock();
1019	+	}});
1020	+
1021	+	await(locked2);
1022	+
1023	+	lock.lock();
1024	+	assertHasWaiters(lock, c, t1, t2);
1025	+	assertFalse(lock.hasQueuedThreads());
1026	+	c.signal();
1027	+	assertHasWaiters(lock, c, t2);
1028	+	assertTrue(lock.hasQueuedThread(t1));
1029	+	assertFalse(lock.hasQueuedThread(t2));
1030	+	c.signal();
1031	+	assertHasNoWaiters(lock, c);
1032	+	assertTrue(lock.hasQueuedThread(t1));
1033	+	assertTrue(lock.hasQueuedThread(t2));
1034	+	lock.unlock();
1035	+	awaitTermination(t1);
1036	+	awaitTermination(t2);
1037	+	}
1038	+
1039	+	/**
1040	+	* await after multiple reentrant locking preserves lock count
1041	+	*/
1042	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1043	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1044	+	public void testAwaitLockCount(boolean fair) {
1045	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1046	+	final Condition c = lock.newCondition();
1047	+	final CountDownLatch locked = new CountDownLatch(2);
1048	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1049	+	public void realRun() throws InterruptedException {
1050	+	lock.lock();
1051	+	assertLockedByMoi(lock);
1052	+	assertEquals(1, lock.getHoldCount());
1053	+	locked.countDown();
1054	+	c.await();
1055	+	assertLockedByMoi(lock);
1056	+	assertEquals(1, lock.getHoldCount());
1057	+	lock.unlock();
1058	+	}});
1059	+
1060	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1061	+	public void realRun() throws InterruptedException {
1062	+	lock.lock();
1063	+	lock.lock();
1064	+	assertLockedByMoi(lock);
1065	+	assertEquals(2, lock.getHoldCount());
1066	+	locked.countDown();
1067	+	c.await();
1068	+	assertLockedByMoi(lock);
1069	+	assertEquals(2, lock.getHoldCount());
1070	+	lock.unlock();
1071	+	lock.unlock();
1072	+	}});
1073	+
1074	+	await(locked);
1075	+	lock.lock();
1076	+	assertHasWaiters(lock, c, t1, t2);
1077	+	assertEquals(1, lock.getHoldCount());
1078	+	c.signalAll();
1079	+	assertHasNoWaiters(lock, c);
1080	+	lock.unlock();
1081	+	awaitTermination(t1);
1082	+	awaitTermination(t2);
1083	+	}
1084	+
1085	+	/**
1086	+	* A serialized lock deserializes as unlocked
1087	+	*/
1088	+	public void testSerialization()      { testSerialization(false); }
1089	+	public void testSerialization_fair() { testSerialization(true); }
1090	+	public void testSerialization(boolean fair) {
1091	+	ReentrantLock lock = new ReentrantLock(fair);
1092	+	lock.lock();
1093	+
1094	+	ReentrantLock clone = serialClone(lock);
1095	+	assertEquals(lock.isFair(), clone.isFair());
1096	+	assertTrue(lock.isLocked());
1097	+	assertFalse(clone.isLocked());
1098	+	assertEquals(1, lock.getHoldCount());
1099	+	assertEquals(0, clone.getHoldCount());
1100	+	clone.lock();
1101	+	clone.lock();
1102	+	assertTrue(clone.isLocked());
1103	+	assertEquals(2, clone.getHoldCount());
1104	+	assertEquals(1, lock.getHoldCount());
1105	+	clone.unlock();
1106	+	clone.unlock();
1107	+	assertTrue(lock.isLocked());
1108	+	assertFalse(clone.isLocked());
1109	+	}
1110	+
1111	+	/**
1112	+	* toString indicates current lock state
1113	+	*/
1114	+	public void testToString()      { testToString(false); }
1115	+	public void testToString_fair() { testToString(true); }
1116	+	public void testToString(boolean fair) {
1117	+	ReentrantLock lock = new ReentrantLock(fair);
1118	+	String us = lock.toString();
1119	+	assertTrue(us.indexOf("Unlocked") >= 0);
1120	+	lock.lock();
1121	+	String ls = lock.toString();
1122	+	assertTrue(ls.indexOf("Locked") >= 0);
1123	+	}
1124		}

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