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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 1.66 by jsr166, Mon Jul 17 21:01:30 2017 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.*;
9	<	import java.util.concurrent.locks.*;
10	<	import java.util.concurrent.*;
11	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class ReentrantLockTest extends JSR166TestCase {
12	<	static int HOLD_COUNT_TEST_LIMIT = 20;
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.CyclicBarrier;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.ReentrantLock;
18	>
19	>	import junit.framework.AssertionFailedError;
20	>	import junit.framework.Test;
21	>	import junit.framework.TestSuite;
22
23	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
24	+	public class ReentrantLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	main(suite(), args);
27		}
19	–
28		public static Test suite() {
29	<	return new TestSuite(ReentrantLockTest.class);
29	>	return new TestSuite(ReentrantLockTest.class);
30	>	}
31	>
32	>	/**
33	>	* A checked runnable calling lockInterruptibly
34	>	*/
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36	>	final ReentrantLock lock;
37	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
38	>	public void realRun() throws InterruptedException {
39	>	lock.lockInterruptibly();
40	>	}
41	>	}
42	>
43	>	/**
44	>	* A checked runnable calling lockInterruptibly that expects to be
45	>	* interrupted
46	>	*/
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48	>	final ReentrantLock lock;
49	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
50	>	public void realRun() throws InterruptedException {
51	>	lock.lockInterruptibly();
52	>	}
53	>	}
54	>
55	>	/**
56	>	* Subclass to expose protected methods
57	>	*/
58	>	static class PublicReentrantLock extends ReentrantLock {
59	>	PublicReentrantLock() { super(); }
60	>	PublicReentrantLock(boolean fair) { super(fair); }
61	>	public Thread getOwner() {
62	>	return super.getOwner();
63	>	}
64	>	public Collection<Thread> getQueuedThreads() {
65	>	return super.getQueuedThreads();
66	>	}
67	>	public Collection<Thread> getWaitingThreads(Condition c) {
68	>	return super.getWaitingThreads(c);
69	>	}
70	>	}
71	>
72	>	/**
73	>	* Releases write lock, checking that it had a hold count of 1.
74	>	*/
75	>	void releaseLock(PublicReentrantLock lock) {
76	>	assertLockedByMoi(lock);
77	>	lock.unlock();
78	>	assertFalse(lock.isHeldByCurrentThread());
79	>	assertNotLocked(lock);
80	>	}
81	>
82	>	/**
83	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
84	>	*/
85	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
86	>	long startTime = System.nanoTime();
87	>	while (!lock.hasQueuedThread(t)) {
88	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
89	>	throw new AssertionFailedError("timed out");
90	>	Thread.yield();
91	>	}
92	>	assertTrue(t.isAlive());
93	>	assertNotSame(t, lock.getOwner());
94	>	}
95	>
96	>	/**
97	>	* Checks that lock is not locked.
98	>	*/
99	>	void assertNotLocked(PublicReentrantLock lock) {
100	>	assertFalse(lock.isLocked());
101	>	assertFalse(lock.isHeldByCurrentThread());
102	>	assertNull(lock.getOwner());
103	>	assertEquals(0, lock.getHoldCount());
104	>	}
105	>
106	>	/**
107	>	* Checks that lock is locked by the given thread.
108	>	*/
109	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
110	>	assertTrue(lock.isLocked());
111	>	assertSame(t, lock.getOwner());
112	>	assertEquals(t == Thread.currentThread(),
113	>	lock.isHeldByCurrentThread());
114	>	assertEquals(t == Thread.currentThread(),
115	>	lock.getHoldCount() > 0);
116	>	}
117	>
118	>	/**
119	>	* Checks that lock is locked by the current thread.
120	>	*/
121	>	void assertLockedByMoi(PublicReentrantLock lock) {
122	>	assertLockedBy(lock, Thread.currentThread());
123		}
124
125	<	/*
126	<	* Unlocks an unlocked lock, throws Illegal Monitor State
26	<	*
125	>	/**
126	>	* Checks that condition c has no waiters.
127		*/
128	<	public void testIllegalMonitorStateException(){
129	<	ReentrantLock rl = new ReentrantLock();
130	<	try{
31	<	rl.unlock();
32	<	fail("Should of thown Illegal Monitor State Exception");
128	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
129	>	assertHasWaiters(lock, c, new Thread[] {});
130	>	}
131
132	<	} catch(IllegalMonitorStateException success){}
132	>	/**
133	>	* Checks that condition c has exactly the given waiter threads.
134	>	*/
135	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
136	>	Thread... threads) {
137	>	lock.lock();
138	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
139	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
140	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
141	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
142	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
143	>	new HashSet<Thread>(Arrays.asList(threads)));
144	>	lock.unlock();
145	>	}
146
147	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
148
149	+	/**
150	+	* Awaits condition "indefinitely" using the specified AwaitMethod.
151	+	*/
152	+	void await(Condition c, AwaitMethod awaitMethod)
153	+	throws InterruptedException {
154	+	long timeoutMillis = 2 * LONG_DELAY_MS;
155	+	switch (awaitMethod) {
156	+	case await:
157	+	c.await();
158	+	break;
159	+	case awaitTimed:
160	+	assertTrue(c.await(timeoutMillis, MILLISECONDS));
161	+	break;
162	+	case awaitNanos:
163	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
164	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
165	+	assertTrue(nanosRemaining > timeoutNanos / 2);
166	+	assertTrue(nanosRemaining <= timeoutNanos);
167	+	break;
168	+	case awaitUntil:
169	+	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
170	+	break;
171	+	default:
172	+	throw new AssertionError();
173	+	}
174		}
175	<
176	<	/*
177	<	* 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.
175	>
176	>	/**
177	>	* Constructor sets given fairness, and is in unlocked state
178		*/
179	+	public void testConstructor() {
180	+	PublicReentrantLock lock;
181
182	<	public void testInterruptedException(){
183	<	final ReentrantLock lock = new ReentrantLock();
184	<	lock.lock();
185	<	Thread t = new Thread(new Runnable() {
186	<	public void run(){
187	<	try{
188	<	lock.lockInterruptibly();
189	<	threadFail("should throw");
190	<	} catch(InterruptedException success){}
191	<	}
192	<	});
182	>	lock = new PublicReentrantLock();
183	>	assertFalse(lock.isFair());
184	>	assertNotLocked(lock);
185	>
186	>	lock = new PublicReentrantLock(true);
187	>	assertTrue(lock.isFair());
188	>	assertNotLocked(lock);
189	>
190	>	lock = new PublicReentrantLock(false);
191	>	assertFalse(lock.isFair());
192	>	assertNotLocked(lock);
193	>	}
194	>
195	>	/**
196	>	* locking an unlocked lock succeeds
197	>	*/
198	>	public void testLock()      { testLock(false); }
199	>	public void testLock_fair() { testLock(true); }
200	>	public void testLock(boolean fair) {
201	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
202	>	lock.lock();
203	>	assertLockedByMoi(lock);
204	>	releaseLock(lock);
205	>	}
206	>
207	>	/**
208	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
209	>	*/
210	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
211	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
212	>	public void testUnlock_IMSE(boolean fair) {
213	>	final ReentrantLock lock = new ReentrantLock(fair);
214		try {
57	–	t.start();
58	–	t.interrupt();
215		lock.unlock();
216	<	t.join();
217	<	} catch(Exception e){
62	<	fail("unexpected exception");
63	<	}
64	<	}
65	<
66	<	/*
67	<	* tests for interrupted exception on a timed wait
68	<	*
69	<	*/
70	<
71	<
72	<	public void testInterruptedException2(){
73	<	final ReentrantLock lock = new ReentrantLock();
74	<	lock.lock();
75	<	Thread t = new Thread(new Runnable() {
76	<	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	<	}
216	>	shouldThrow();
217	>	} catch (IllegalMonitorStateException success) {}
218		}
219
220	+	/**
221	+	* tryLock on an unlocked lock succeeds
222	+	*/
223	+	public void testTryLock()      { testTryLock(false); }
224	+	public void testTryLock_fair() { testTryLock(true); }
225	+	public void testTryLock(boolean fair) {
226	+	PublicReentrantLock lock = new PublicReentrantLock(fair);
227	+	assertTrue(lock.tryLock());
228	+	assertLockedByMoi(lock);
229	+	assertTrue(lock.tryLock());
230	+	assertLockedByMoi(lock);
231	+	lock.unlock();
232	+	releaseLock(lock);
233	+	}
234	+
235	+	/**
236	+	* hasQueuedThreads reports whether there are waiting threads
237	+	*/
238	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
239	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
240	+	public void testHasQueuedThreads(boolean fair) {
241	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
242	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
243	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
244	+	assertFalse(lock.hasQueuedThreads());
245	+	lock.lock();
246	+	assertFalse(lock.hasQueuedThreads());
247	+	t1.start();
248	+	waitForQueuedThread(lock, t1);
249	+	assertTrue(lock.hasQueuedThreads());
250	+	t2.start();
251	+	waitForQueuedThread(lock, t2);
252	+	assertTrue(lock.hasQueuedThreads());
253	+	t1.interrupt();
254	+	awaitTermination(t1);
255	+	assertTrue(lock.hasQueuedThreads());
256	+	lock.unlock();
257	+	awaitTermination(t2);
258	+	assertFalse(lock.hasQueuedThreads());
259	+	}
260
261	<	public void testTryLockWhenLocked() {
262	<	final ReentrantLock lock = new ReentrantLock();
263	<	lock.lock();
264	<	Thread t = new Thread(new Runnable() {
265	<	public void run(){
266	<	threadAssertFalse(lock.tryLock());
267	<	}
268	<	});
261	>	/**
262	>	* getQueueLength reports number of waiting threads
263	>	*/
264	>	public void testGetQueueLength()      { testGetQueueLength(false); }
265	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
266	>	public void testGetQueueLength(boolean fair) {
267	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
268	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
269	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
270	>	assertEquals(0, lock.getQueueLength());
271	>	lock.lock();
272	>	t1.start();
273	>	waitForQueuedThread(lock, t1);
274	>	assertEquals(1, lock.getQueueLength());
275	>	t2.start();
276	>	waitForQueuedThread(lock, t2);
277	>	assertEquals(2, lock.getQueueLength());
278	>	t1.interrupt();
279	>	awaitTermination(t1);
280	>	assertEquals(1, lock.getQueueLength());
281	>	lock.unlock();
282	>	awaitTermination(t2);
283	>	assertEquals(0, lock.getQueueLength());
284	>	}
285	>
286	>	/**
287	>	* hasQueuedThread(null) throws NPE
288	>	*/
289	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
290	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
291	>	public void testHasQueuedThreadNPE(boolean fair) {
292	>	final ReentrantLock lock = new ReentrantLock(fair);
293		try {
294	<	t.start();
295	<	t.join();
294	>	lock.hasQueuedThread(null);
295	>	shouldThrow();
296	>	} catch (NullPointerException success) {}
297	>	}
298	>
299	>	/**
300	>	* hasQueuedThread reports whether a thread is queued
301	>	*/
302	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
303	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
304	>	public void testHasQueuedThread(boolean fair) {
305	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
306	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
307	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
308	>	assertFalse(lock.hasQueuedThread(t1));
309	>	assertFalse(lock.hasQueuedThread(t2));
310	>	lock.lock();
311	>	t1.start();
312	>	waitForQueuedThread(lock, t1);
313	>	assertTrue(lock.hasQueuedThread(t1));
314	>	assertFalse(lock.hasQueuedThread(t2));
315	>	t2.start();
316	>	waitForQueuedThread(lock, t2);
317	>	assertTrue(lock.hasQueuedThread(t1));
318	>	assertTrue(lock.hasQueuedThread(t2));
319	>	t1.interrupt();
320	>	awaitTermination(t1);
321	>	assertFalse(lock.hasQueuedThread(t1));
322	>	assertTrue(lock.hasQueuedThread(t2));
323	>	lock.unlock();
324	>	awaitTermination(t2);
325	>	assertFalse(lock.hasQueuedThread(t1));
326	>	assertFalse(lock.hasQueuedThread(t2));
327	>	}
328	>
329	>	/**
330	>	* getQueuedThreads includes waiting threads
331	>	*/
332	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
333	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
334	>	public void testGetQueuedThreads(boolean fair) {
335	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
336	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
337	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
338	>	assertTrue(lock.getQueuedThreads().isEmpty());
339	>	lock.lock();
340	>	assertTrue(lock.getQueuedThreads().isEmpty());
341	>	t1.start();
342	>	waitForQueuedThread(lock, t1);
343	>	assertEquals(1, lock.getQueuedThreads().size());
344	>	assertTrue(lock.getQueuedThreads().contains(t1));
345	>	t2.start();
346	>	waitForQueuedThread(lock, t2);
347	>	assertEquals(2, lock.getQueuedThreads().size());
348	>	assertTrue(lock.getQueuedThreads().contains(t1));
349	>	assertTrue(lock.getQueuedThreads().contains(t2));
350	>	t1.interrupt();
351	>	awaitTermination(t1);
352	>	assertFalse(lock.getQueuedThreads().contains(t1));
353	>	assertTrue(lock.getQueuedThreads().contains(t2));
354	>	assertEquals(1, lock.getQueuedThreads().size());
355	>	lock.unlock();
356	>	awaitTermination(t2);
357	>	assertTrue(lock.getQueuedThreads().isEmpty());
358	>	}
359	>
360	>	/**
361	>	* timed tryLock is interruptible
362	>	*/
363	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
364	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
365	>	public void testTryLock_Interruptible(boolean fair) {
366	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
367	>	lock.lock();
368	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
369	>	public void realRun() throws InterruptedException {
370	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
371	>	}});
372	>
373	>	waitForQueuedThread(lock, t);
374	>	t.interrupt();
375	>	awaitTermination(t);
376	>	releaseLock(lock);
377	>	}
378	>
379	>	/**
380	>	* tryLock on a locked lock fails
381	>	*/
382	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
383	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
384	>	public void testTryLockWhenLocked(boolean fair) {
385	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
386	>	lock.lock();
387	>	Thread t = newStartedThread(new CheckedRunnable() {
388	>	public void realRun() {
389	>	assertFalse(lock.tryLock());
390	>	}});
391	>
392	>	awaitTermination(t);
393	>	releaseLock(lock);
394	>	}
395	>
396	>	/**
397	>	* Timed tryLock on a locked lock times out
398	>	*/
399	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
400	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
401	>	public void testTryLock_Timeout(boolean fair) {
402	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
403	>	final long timeoutMillis = timeoutMillis();
404	>	lock.lock();
405	>	Thread t = newStartedThread(new CheckedRunnable() {
406	>	public void realRun() throws InterruptedException {
407	>	long startTime = System.nanoTime();
408	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
409	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
410	>	}});
411	>
412	>	awaitTermination(t);
413	>	releaseLock(lock);
414	>	}
415	>
416	>	/**
417	>	* getHoldCount returns number of recursive holds
418	>	*/
419	>	public void testGetHoldCount()      { testGetHoldCount(false); }
420	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
421	>	public void testGetHoldCount(boolean fair) {
422	>	final ReentrantLock lock = new ReentrantLock(fair);
423	>	for (int i = 1; i <= SIZE; i++) {
424	>	lock.lock();
425	>	assertEquals(i, lock.getHoldCount());
426	>	}
427	>	for (int i = SIZE; i > 0; i--) {
428		lock.unlock();
429	<	} catch(Exception e){
105	<	fail("unexpected exception");
429	>	assertEquals(i - 1, lock.getHoldCount());
430		}
431	<	}
431	>	}
432
433	<	public void testTryLock_Timeout(){
434	<	final ReentrantLock lock = new ReentrantLock();
435	<	lock.lock();
436	<	Thread t = new Thread(new Runnable() {
437	<	public void run(){
438	<	try {
439	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
116	<	} catch (Exception ex) {
117	<	threadFail("unexpected exception");
118	<	}
119	<	}
120	<	});
433	>	/**
434	>	* isLocked is true when locked and false when not
435	>	*/
436	>	public void testIsLocked()      { testIsLocked(false); }
437	>	public void testIsLocked_fair() { testIsLocked(true); }
438	>	public void testIsLocked(boolean fair) {
439	>	final ReentrantLock lock = new ReentrantLock(fair);
440		try {
441	<	t.start();
442	<	t.join();
441	>	assertFalse(lock.isLocked());
442	>	lock.lock();
443	>	assertTrue(lock.isLocked());
444	>	lock.lock();
445	>	assertTrue(lock.isLocked());
446		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);
447		assertTrue(lock.isLocked());
448	<	t.join();
448	>	lock.unlock();
449		assertFalse(lock.isLocked());
450	<	} catch(Exception e){
451	<	fail("unexpected exception");
452	<	}
453	<	}
450	>	final CyclicBarrier barrier = new CyclicBarrier(2);
451	>	Thread t = newStartedThread(new CheckedRunnable() {
452	>	public void realRun() throws Exception {
453	>	lock.lock();
454	>	assertTrue(lock.isLocked());
455	>	barrier.await();
456	>	barrier.await();
457	>	lock.unlock();
458	>	}});
459
460	+	barrier.await();
461	+	assertTrue(lock.isLocked());
462	+	barrier.await();
463	+	awaitTermination(t);
464	+	assertFalse(lock.isLocked());
465	+	} catch (Exception fail) { threadUnexpectedException(fail); }
466	+	}
467
468	<	public void testLockInterruptibly() {
469	<	final ReentrantLock lock = new ReentrantLock();
470	<	try {
471	<	lock.lockInterruptibly();
472	<	} catch(Exception e) {
473	<	fail("unexpected exception");
474	<	}
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	<	});
468	>	/**
469	>	* lockInterruptibly succeeds when unlocked, else is interruptible
470	>	*/
471	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
472	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
473	>	public void testLockInterruptibly(boolean fair) {
474	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
475		try {
476	<	t.start();
477	<	t.interrupt();
478	<	assertTrue(lock.isLocked());
479	<	assertTrue(lock.isHeldByCurrentThread());
480	<	t.join();
481	<	} catch(Exception e){
482	<	fail("unexpected exception");
483	<	}
476	>	lock.lockInterruptibly();
477	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
478	>	assertLockedByMoi(lock);
479	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
480	>	waitForQueuedThread(lock, t);
481	>	t.interrupt();
482	>	assertTrue(lock.isLocked());
483	>	assertTrue(lock.isHeldByCurrentThread());
484	>	awaitTermination(t);
485	>	releaseLock(lock);
486		}
487
488	<	public void testAwait_IllegalMonitor() {
489	<	final ReentrantLock lock = new ReentrantLock();
488	>	/**
489	>	* Calling await without holding lock throws IllegalMonitorStateException
490	>	*/
491	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
492	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
493	>	public void testAwait_IMSE(boolean fair) {
494	>	final ReentrantLock lock = new ReentrantLock(fair);
495		final Condition c = lock.newCondition();
496	<	try {
497	<	c.await();
498	<	fail("should throw");
499	<	}
500	<	catch (IllegalMonitorStateException success) {
501	<	}
502	<	catch (Exception ex) {
503	<	fail("should throw IMSE");
496	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
497	>	long startTime = System.nanoTime();
498	>	try {
499	>	await(c, awaitMethod);
500	>	shouldThrow();
501	>	} catch (IllegalMonitorStateException success) {
502	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
503	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
504		}
505		}
506
507	<	public void testSignal_IllegalMonitor() {
508	<	final ReentrantLock lock = new ReentrantLock();
507	>	/**
508	>	* Calling signal without holding lock throws IllegalMonitorStateException
509	>	*/
510	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
511	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
512	>	public void testSignal_IMSE(boolean fair) {
513	>	final ReentrantLock lock = new ReentrantLock(fair);
514		final Condition c = lock.newCondition();
515		try {
516		c.signal();
517	<	fail("should throw");
518	<	}
223	<	catch (IllegalMonitorStateException success) {
224	<	}
225	<	catch (Exception ex) {
226	<	fail("should throw IMSE");
227	<	}
517	>	shouldThrow();
518	>	} catch (IllegalMonitorStateException success) {}
519		}
520
521	<	public void testAwaitNanos_Timeout() {
522	<	final ReentrantLock lock = new ReentrantLock();
521	>	/**
522	>	* awaitNanos without a signal times out
523	>	*/
524	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
525	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
526	>	public void testAwaitNanos_Timeout(boolean fair) {
527	>	final ReentrantLock lock = new ReentrantLock(fair);
528		final Condition c = lock.newCondition();
529	+	final long timeoutMillis = timeoutMillis();
530	+	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
531	+	lock.lock();
532	+	final long startTime = System.nanoTime();
533		try {
534	<	lock.lock();
535	<	long t = c.awaitNanos(100);
536	<	assertTrue(t <= 0);
537	<	lock.unlock();
538	<	}
239	<	catch (Exception ex) {
240	<	fail("unexpected exception");
241	<	}
534	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
535	>	assertTrue(nanosRemaining <= 0);
536	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
537	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
538	>	lock.unlock();
539		}
540
541	<	public void testAwait_Timeout() {
542	<	final ReentrantLock lock = new ReentrantLock();
541	>	/**
542	>	* timed await without a signal times out
543	>	*/
544	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
545	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
546	>	public void testAwait_Timeout(boolean fair) {
547	>	final ReentrantLock lock = new ReentrantLock(fair);
548		final Condition c = lock.newCondition();
549	+	final long timeoutMillis = timeoutMillis();
550	+	lock.lock();
551	+	final long startTime = System.nanoTime();
552		try {
553	<	lock.lock();
554	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
555	<	lock.unlock();
556	<	}
252	<	catch (Exception ex) {
253	<	fail("unexpected exception");
254	<	}
553	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
554	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
555	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
556	>	lock.unlock();
557		}
558
559	<	public void testAwaitUntil_Timeout() {
560	<	final ReentrantLock lock = new ReentrantLock();
559	>	/**
560	>	* awaitUntil without a signal times out
561	>	*/
562	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
563	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
564	>	public void testAwaitUntil_Timeout(boolean fair) {
565	>	final ReentrantLock lock = new ReentrantLock(fair);
566		final Condition c = lock.newCondition();
567	+	lock.lock();
568	+	// We shouldn't assume that nanoTime and currentTimeMillis
569	+	// use the same time source, so don't use nanoTime here.
570	+	final java.util.Date delayedDate = delayedDate(timeoutMillis());
571		try {
572	<	lock.lock();
573	<	java.util.Date d = new java.util.Date();
574	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
575	<	lock.unlock();
265	<	}
266	<	catch (Exception ex) {
267	<	fail("unexpected exception");
268	<	}
572	>	assertFalse(c.awaitUntil(delayedDate));
573	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
574	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
575	>	lock.unlock();
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 condition = 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	+	condition.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	+	condition.awaitUninterruptibly();
909	+	assertTrue(Thread.interrupted());
910	+	lock.unlock();
911	+	}});
912	+
913	+	await(pleaseInterrupt);
914	+	t2.interrupt();
915	+	lock.lock();
916	+	lock.unlock();
917	+	assertThreadBlocks(t1, Thread.State.WAITING);
918	+	assertThreadBlocks(t2, Thread.State.WAITING);
919	+
920	+	lock.lock();
921	+	condition.signalAll();
922	+	lock.unlock();
923	+
924	+	awaitTermination(t1);
925	+	awaitTermination(t2);
926	+	}
927	+
928	+	/**
929	+	* await/awaitNanos/awaitUntil is interruptible
930	+	*/
931	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
932	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
933	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
934	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
935	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
936	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
937	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
938	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
939	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
940	+	final PublicReentrantLock lock =
941	+	new PublicReentrantLock(fair);
942	+	final Condition c = lock.newCondition();
943	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
944	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
945	+	public void realRun() throws InterruptedException {
946	+	lock.lock();
947	+	assertLockedByMoi(lock);
948	+	assertHasNoWaiters(lock, c);
949	+	pleaseInterrupt.countDown();
950	+	try {
951	+	await(c, awaitMethod);
952	+	} finally {
953	+	assertLockedByMoi(lock);
954	+	assertHasNoWaiters(lock, c);
955	+	lock.unlock();
956	+	assertFalse(Thread.interrupted());
957	+	}
958	+	}});
959	+
960	+	await(pleaseInterrupt);
961	+	assertHasWaiters(lock, c, t);
962	+	t.interrupt();
963	+	awaitTermination(t);
964	+	assertNotLocked(lock);
965	+	}
966	+
967	+	/**
968	+	* signalAll wakes up all threads
969	+	*/
970	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
971	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
972	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
973	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
974	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
975	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
976	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
977	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
978	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
979	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
980	+	final Condition c = lock.newCondition();
981	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
982	+	class Awaiter extends CheckedRunnable {
983	+	public void realRun() throws InterruptedException {
984	+	lock.lock();
985	+	pleaseSignal.countDown();
986	+	await(c, awaitMethod);
987	+	lock.unlock();
988	+	}
989	+	}
990	+
991	+	Thread t1 = newStartedThread(new Awaiter());
992	+	Thread t2 = newStartedThread(new Awaiter());
993	+
994	+	await(pleaseSignal);
995	+	lock.lock();
996	+	assertHasWaiters(lock, c, t1, t2);
997	+	c.signalAll();
998	+	assertHasNoWaiters(lock, c);
999	+	lock.unlock();
1000	+	awaitTermination(t1);
1001	+	awaitTermination(t2);
1002	+	}
1003	+
1004	+	/**
1005	+	* signal wakes up waiting threads in FIFO order
1006	+	*/
1007	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1008	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1009	+	public void testSignalWakesFifo(boolean fair) {
1010	+	final PublicReentrantLock lock =
1011	+	new PublicReentrantLock(fair);
1012	+	final Condition c = lock.newCondition();
1013	+	final CountDownLatch locked1 = new CountDownLatch(1);
1014	+	final CountDownLatch locked2 = new CountDownLatch(1);
1015	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1016	+	public void realRun() throws InterruptedException {
1017	+	lock.lock();
1018	+	locked1.countDown();
1019	+	c.await();
1020	+	lock.unlock();
1021	+	}});
1022	+
1023	+	await(locked1);
1024	+
1025	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1026	+	public void realRun() throws InterruptedException {
1027	+	lock.lock();
1028	+	locked2.countDown();
1029	+	c.await();
1030	+	lock.unlock();
1031	+	}});
1032	+
1033	+	await(locked2);
1034	+
1035	+	lock.lock();
1036	+	assertHasWaiters(lock, c, t1, t2);
1037	+	assertFalse(lock.hasQueuedThreads());
1038	+	c.signal();
1039	+	assertHasWaiters(lock, c, t2);
1040	+	assertTrue(lock.hasQueuedThread(t1));
1041	+	assertFalse(lock.hasQueuedThread(t2));
1042	+	c.signal();
1043	+	assertHasNoWaiters(lock, c);
1044	+	assertTrue(lock.hasQueuedThread(t1));
1045	+	assertTrue(lock.hasQueuedThread(t2));
1046	+	lock.unlock();
1047	+	awaitTermination(t1);
1048	+	awaitTermination(t2);
1049	+	}
1050	+
1051	+	/**
1052	+	* await after multiple reentrant locking preserves lock count
1053	+	*/
1054	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1055	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1056	+	public void testAwaitLockCount(boolean fair) {
1057	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1058	+	final Condition c = lock.newCondition();
1059	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1060	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1061	+	public void realRun() throws InterruptedException {
1062	+	lock.lock();
1063	+	assertLockedByMoi(lock);
1064	+	assertEquals(1, lock.getHoldCount());
1065	+	pleaseSignal.countDown();
1066	+	c.await();
1067	+	assertLockedByMoi(lock);
1068	+	assertEquals(1, lock.getHoldCount());
1069	+	lock.unlock();
1070	+	}});
1071	+
1072	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1073	+	public void realRun() throws InterruptedException {
1074	+	lock.lock();
1075	+	lock.lock();
1076	+	assertLockedByMoi(lock);
1077	+	assertEquals(2, lock.getHoldCount());
1078	+	pleaseSignal.countDown();
1079	+	c.await();
1080	+	assertLockedByMoi(lock);
1081	+	assertEquals(2, lock.getHoldCount());
1082	+	lock.unlock();
1083	+	lock.unlock();
1084	+	}});
1085	+
1086	+	await(pleaseSignal);
1087	+	lock.lock();
1088	+	assertHasWaiters(lock, c, t1, t2);
1089	+	assertEquals(1, lock.getHoldCount());
1090	+	c.signalAll();
1091	+	assertHasNoWaiters(lock, c);
1092	+	lock.unlock();
1093	+	awaitTermination(t1);
1094	+	awaitTermination(t2);
1095	+	}
1096	+
1097	+	/**
1098	+	* A serialized lock deserializes as unlocked
1099	+	*/
1100	+	public void testSerialization()      { testSerialization(false); }
1101	+	public void testSerialization_fair() { testSerialization(true); }
1102	+	public void testSerialization(boolean fair) {
1103	+	final ReentrantLock lock = new ReentrantLock(fair);
1104	+	lock.lock();
1105	+
1106	+	ReentrantLock clone = serialClone(lock);
1107	+	assertEquals(lock.isFair(), clone.isFair());
1108	+	assertTrue(lock.isLocked());
1109	+	assertFalse(clone.isLocked());
1110	+	assertEquals(1, lock.getHoldCount());
1111	+	assertEquals(0, clone.getHoldCount());
1112	+	clone.lock();
1113	+	clone.lock();
1114	+	assertTrue(clone.isLocked());
1115	+	assertEquals(2, clone.getHoldCount());
1116	+	assertEquals(1, lock.getHoldCount());
1117	+	clone.unlock();
1118	+	clone.unlock();
1119	+	assertTrue(lock.isLocked());
1120	+	assertFalse(clone.isLocked());
1121	+	}
1122	+
1123	+	/**
1124	+	* toString indicates current lock state
1125	+	*/
1126	+	public void testToString()      { testToString(false); }
1127	+	public void testToString_fair() { testToString(true); }
1128	+	public void testToString(boolean fair) {
1129	+	final ReentrantLock lock = new ReentrantLock(fair);
1130	+	assertTrue(lock.toString().contains("Unlocked"));
1131	+	lock.lock();
1132	+	assertTrue(lock.toString().contains("Locked by"));
1133	+	lock.unlock();
1134	+	assertTrue(lock.toString().contains("Unlocked"));
1135	+	}
1136		}

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