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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.54 by jsr166, Wed Dec 31 19:05:43 2014 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 TestCase {
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	+	public class ReentrantLockTest extends JSR166TestCase {
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
19	–
27		public static Test suite() {
28	<	return new TestSuite(ReentrantLockTest.class);
28	>	return new TestSuite(ReentrantLockTest.class);
29		}
30
31	<	private static long SHORT_DELAY_MS = 100;
32	<	private static long MEDIUM_DELAY_MS = 1000;
33	<	private static long LONG_DELAY_MS = 10000;
34	<
35	<	/*
36	<	* Unlocks an unlocked lock, throws Illegal Monitor State
37	<	*
38	<	*/
39	<
40	<	public void testIllegalMonitorStateException(){
41	<	ReentrantLock rl = new ReentrantLock();
42	<	try{
43	<	rl.unlock();
44	<	fail("Should of thown Illegal Monitor State Exception");
45	<
46	<	} catch(IllegalMonitorStateException success){}
47	<
48	<
49	<	}
50	<
51	<	/*
52	<	* makes a lock, locks it, tries to aquire the lock in another thread
53	<	* interrupts that thread and waits for an interrupted Exception to
54	<	* be thrown.
55	<	*/
56	<
57	<	public void testInterruptedException(){
58	<	final ReentrantLock lock = new ReentrantLock();
59	<	lock.lock();
60	<	Thread t = new Thread(new Runnable() {
61	<	public void run(){
62	<	try{
63	<	lock.lockInterruptibly();
64	<	fail("should throw");
65	<	} catch(InterruptedException success){}
66	<	}
67	<	});
68	<	t.start();
69	<	t.interrupt();
70	<	lock.unlock();
71	<	}
72	<
73	<	/*
74	<	* tests for interrupted exception on a timed wait
75	<	*
76	<	*/
77	<
78	<
79	<	public void testInterruptedException2(){
80	<	final ReentrantLock lock = new ReentrantLock();
81	<	lock.lock();
82	<	Thread t = new Thread(new Runnable() {
83	<	public void run(){
84	<	try{
85	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
86	<	fail("should throw");
87	<	} catch(InterruptedException success){}
88	<	}
89	<	});
90	<	t.start();
91	<	t.interrupt();
92	<	}
93	<
94	<
95	<	public void testTryLockWhenLocked() {
96	<	final ReentrantLock lock = new ReentrantLock();
97	<	lock.lock();
98	<	Thread t = new Thread(new Runnable() {
99	<	public void run(){
100	<	assertFalse(lock.tryLock());
101	<	}
102	<	});
31	>	/**
32	>	* A runnable calling lockInterruptibly
33	>	*/
34	>	class InterruptibleLockRunnable extends CheckedRunnable {
35	>	final ReentrantLock lock;
36	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
37	>	public void realRun() throws InterruptedException {
38	>	lock.lockInterruptibly();
39	>	}
40	>	}
41	>
42	>	/**
43	>	* A runnable calling lockInterruptibly that expects to be
44	>	* interrupted
45	>	*/
46	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
47	>	final ReentrantLock lock;
48	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
49	>	public void realRun() throws InterruptedException {
50	>	lock.lockInterruptibly();
51	>	}
52	>	}
53	>
54	>	/**
55	>	* Subclass to expose protected methods
56	>	*/
57	>	static class PublicReentrantLock extends ReentrantLock {
58	>	PublicReentrantLock() { super(); }
59	>	PublicReentrantLock(boolean fair) { super(fair); }
60	>	public Thread getOwner() {
61	>	return super.getOwner();
62	>	}
63	>	public Collection<Thread> getQueuedThreads() {
64	>	return super.getQueuedThreads();
65	>	}
66	>	public Collection<Thread> getWaitingThreads(Condition c) {
67	>	return super.getWaitingThreads(c);
68	>	}
69	>	}
70	>
71	>	/**
72	>	* Releases write lock, checking that it had a hold count of 1.
73	>	*/
74	>	void releaseLock(PublicReentrantLock lock) {
75	>	assertLockedByMoi(lock);
76	>	lock.unlock();
77	>	assertFalse(lock.isHeldByCurrentThread());
78	>	assertNotLocked(lock);
79	>	}
80	>
81	>	/**
82	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
83	>	*/
84	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
85	>	long startTime = System.nanoTime();
86	>	while (!lock.hasQueuedThread(t)) {
87	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
88	>	throw new AssertionFailedError("timed out");
89	>	Thread.yield();
90	>	}
91	>	assertTrue(t.isAlive());
92	>	assertNotSame(t, lock.getOwner());
93	>	}
94	>
95	>	/**
96	>	* Checks that lock is not locked.
97	>	*/
98	>	void assertNotLocked(PublicReentrantLock lock) {
99	>	assertFalse(lock.isLocked());
100	>	assertFalse(lock.isHeldByCurrentThread());
101	>	assertNull(lock.getOwner());
102	>	assertEquals(0, lock.getHoldCount());
103	>	}
104	>
105	>	/**
106	>	* Checks that lock is locked by the given thread.
107	>	*/
108	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
109	>	assertTrue(lock.isLocked());
110	>	assertSame(t, lock.getOwner());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.isHeldByCurrentThread());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.getHoldCount() > 0);
115	>	}
116	>
117	>	/**
118	>	* Checks that lock is locked by the current thread.
119	>	*/
120	>	void assertLockedByMoi(PublicReentrantLock lock) {
121	>	assertLockedBy(lock, Thread.currentThread());
122	>	}
123	>
124	>	/**
125	>	* Checks that condition c has no waiters.
126	>	*/
127	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
128	>	assertHasWaiters(lock, c, new Thread[] {});
129	>	}
130	>
131	>	/**
132	>	* Checks that condition c has exactly the given waiter threads.
133	>	*/
134	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
135	>	Thread... threads) {
136	>	lock.lock();
137	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
138	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
139	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
140	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
141	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
142	>	new HashSet<Thread>(Arrays.asList(threads)));
143	>	lock.unlock();
144	>	}
145	>
146	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
147	>
148	>	/**
149	>	* Awaits condition using the specified AwaitMethod.
150	>	*/
151	>	void await(Condition c, AwaitMethod awaitMethod)
152	>	throws InterruptedException {
153	>	long timeoutMillis = 2 * LONG_DELAY_MS;
154	>	switch (awaitMethod) {
155	>	case await:
156	>	c.await();
157	>	break;
158	>	case awaitTimed:
159	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
160	>	break;
161	>	case awaitNanos:
162	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
163	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
164	>	assertTrue(nanosRemaining > 0);
165	>	break;
166	>	case awaitUntil:
167	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
168	>	break;
169	>	}
170	>	}
171	>
172	>	/**
173	>	* Constructor sets given fairness, and is in unlocked state
174	>	*/
175	>	public void testConstructor() {
176	>	PublicReentrantLock lock;
177	>
178	>	lock = new PublicReentrantLock();
179	>	assertFalse(lock.isFair());
180	>	assertNotLocked(lock);
181	>
182	>	lock = new PublicReentrantLock(true);
183	>	assertTrue(lock.isFair());
184	>	assertNotLocked(lock);
185	>
186	>	lock = new PublicReentrantLock(false);
187	>	assertFalse(lock.isFair());
188	>	assertNotLocked(lock);
189	>	}
190	>
191	>	/**
192	>	* locking an unlocked lock succeeds
193	>	*/
194	>	public void testLock()      { testLock(false); }
195	>	public void testLock_fair() { testLock(true); }
196	>	public void testLock(boolean fair) {
197	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
198	>	lock.lock();
199	>	assertLockedByMoi(lock);
200	>	releaseLock(lock);
201	>	}
202	>
203	>	/**
204	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
205	>	*/
206	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
207	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
208	>	public void testUnlock_IMSE(boolean fair) {
209	>	ReentrantLock lock = new ReentrantLock(fair);
210		try {
97	–	t.start();
98	–	t.join();
211		lock.unlock();
212	<	} catch(Exception e){
213	<	fail("unexpected exception");
214	<	}
103	<	}
212	>	shouldThrow();
213	>	} catch (IllegalMonitorStateException success) {}
214	>	}
215
216	<	public void testTryLock_Timeout(){
217	<	final ReentrantLock lock = new ReentrantLock();
218	<	lock.lock();
219	<	Thread t = new Thread(new Runnable() {
220	<	public void run(){
221	<	try {
222	<	assertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
223	<	} catch (Exception ex) {
224	<	fail("unexpected exception");
225	<	}
226	<	}
227	<	});
216	>	/**
217	>	* tryLock on an unlocked lock succeeds
218	>	*/
219	>	public void testTryLock()      { testTryLock(false); }
220	>	public void testTryLock_fair() { testTryLock(true); }
221	>	public void testTryLock(boolean fair) {
222	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
223	>	assertTrue(lock.tryLock());
224	>	assertLockedByMoi(lock);
225	>	assertTrue(lock.tryLock());
226	>	assertLockedByMoi(lock);
227	>	lock.unlock();
228	>	releaseLock(lock);
229	>	}
230	>
231	>	/**
232	>	* hasQueuedThreads reports whether there are waiting threads
233	>	*/
234	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
235	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
236	>	public void testHasQueuedThreads(boolean fair) {
237	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
238	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
239	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
240	>	assertFalse(lock.hasQueuedThreads());
241	>	lock.lock();
242	>	assertFalse(lock.hasQueuedThreads());
243	>	t1.start();
244	>	waitForQueuedThread(lock, t1);
245	>	assertTrue(lock.hasQueuedThreads());
246	>	t2.start();
247	>	waitForQueuedThread(lock, t2);
248	>	assertTrue(lock.hasQueuedThreads());
249	>	t1.interrupt();
250	>	awaitTermination(t1);
251	>	assertTrue(lock.hasQueuedThreads());
252	>	lock.unlock();
253	>	awaitTermination(t2);
254	>	assertFalse(lock.hasQueuedThreads());
255	>	}
256	>
257	>	/**
258	>	* getQueueLength reports number of waiting threads
259	>	*/
260	>	public void testGetQueueLength()      { testGetQueueLength(false); }
261	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
262	>	public void testGetQueueLength(boolean fair) {
263	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
264	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
265	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
266	>	assertEquals(0, lock.getQueueLength());
267	>	lock.lock();
268	>	t1.start();
269	>	waitForQueuedThread(lock, t1);
270	>	assertEquals(1, lock.getQueueLength());
271	>	t2.start();
272	>	waitForQueuedThread(lock, t2);
273	>	assertEquals(2, lock.getQueueLength());
274	>	t1.interrupt();
275	>	awaitTermination(t1);
276	>	assertEquals(1, lock.getQueueLength());
277	>	lock.unlock();
278	>	awaitTermination(t2);
279	>	assertEquals(0, lock.getQueueLength());
280	>	}
281	>
282	>	/**
283	>	* hasQueuedThread(null) throws NPE
284	>	*/
285	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
286	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
287	>	public void testHasQueuedThreadNPE(boolean fair) {
288	>	final ReentrantLock lock = new ReentrantLock(fair);
289		try {
290	<	t.start();
291	<	t.join();
290	>	lock.hasQueuedThread(null);
291	>	shouldThrow();
292	>	} catch (NullPointerException success) {}
293	>	}
294	>
295	>	/**
296	>	* hasQueuedThread reports whether a thread is queued
297	>	*/
298	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
299	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
300	>	public void testHasQueuedThread(boolean fair) {
301	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
302	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
303	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
304	>	assertFalse(lock.hasQueuedThread(t1));
305	>	assertFalse(lock.hasQueuedThread(t2));
306	>	lock.lock();
307	>	t1.start();
308	>	waitForQueuedThread(lock, t1);
309	>	assertTrue(lock.hasQueuedThread(t1));
310	>	assertFalse(lock.hasQueuedThread(t2));
311	>	t2.start();
312	>	waitForQueuedThread(lock, t2);
313	>	assertTrue(lock.hasQueuedThread(t1));
314	>	assertTrue(lock.hasQueuedThread(t2));
315	>	t1.interrupt();
316	>	awaitTermination(t1);
317	>	assertFalse(lock.hasQueuedThread(t1));
318	>	assertTrue(lock.hasQueuedThread(t2));
319	>	lock.unlock();
320	>	awaitTermination(t2);
321	>	assertFalse(lock.hasQueuedThread(t1));
322	>	assertFalse(lock.hasQueuedThread(t2));
323	>	}
324	>
325	>	/**
326	>	* getQueuedThreads includes waiting threads
327	>	*/
328	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
329	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
330	>	public void testGetQueuedThreads(boolean fair) {
331	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
332	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
333	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
334	>	assertTrue(lock.getQueuedThreads().isEmpty());
335	>	lock.lock();
336	>	assertTrue(lock.getQueuedThreads().isEmpty());
337	>	t1.start();
338	>	waitForQueuedThread(lock, t1);
339	>	assertEquals(1, lock.getQueuedThreads().size());
340	>	assertTrue(lock.getQueuedThreads().contains(t1));
341	>	t2.start();
342	>	waitForQueuedThread(lock, t2);
343	>	assertEquals(2, lock.getQueuedThreads().size());
344	>	assertTrue(lock.getQueuedThreads().contains(t1));
345	>	assertTrue(lock.getQueuedThreads().contains(t2));
346	>	t1.interrupt();
347	>	awaitTermination(t1);
348	>	assertFalse(lock.getQueuedThreads().contains(t1));
349	>	assertTrue(lock.getQueuedThreads().contains(t2));
350	>	assertEquals(1, lock.getQueuedThreads().size());
351	>	lock.unlock();
352	>	awaitTermination(t2);
353	>	assertTrue(lock.getQueuedThreads().isEmpty());
354	>	}
355	>
356	>	/**
357	>	* timed tryLock is interruptible
358	>	*/
359	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
360	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
361	>	public void testTryLock_Interruptible(boolean fair) {
362	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
363	>	lock.lock();
364	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
365	>	public void realRun() throws InterruptedException {
366	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
367	>	}});
368	>
369	>	waitForQueuedThread(lock, t);
370	>	t.interrupt();
371	>	awaitTermination(t);
372	>	releaseLock(lock);
373	>	}
374	>
375	>	/**
376	>	* tryLock on a locked lock fails
377	>	*/
378	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
379	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
380	>	public void testTryLockWhenLocked(boolean fair) {
381	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
382	>	lock.lock();
383	>	Thread t = newStartedThread(new CheckedRunnable() {
384	>	public void realRun() {
385	>	assertFalse(lock.tryLock());
386	>	}});
387	>
388	>	awaitTermination(t);
389	>	releaseLock(lock);
390	>	}
391	>
392	>	/**
393	>	* Timed tryLock on a locked lock times out
394	>	*/
395	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
396	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
397	>	public void testTryLock_Timeout(boolean fair) {
398	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
399	>	lock.lock();
400	>	Thread t = newStartedThread(new CheckedRunnable() {
401	>	public void realRun() throws InterruptedException {
402	>	long startTime = System.nanoTime();
403	>	long timeoutMillis = 10;
404	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
405	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
406	>	}});
407	>
408	>	awaitTermination(t);
409	>	releaseLock(lock);
410	>	}
411	>
412	>	/**
413	>	* getHoldCount returns number of recursive holds
414	>	*/
415	>	public void testGetHoldCount()      { testGetHoldCount(false); }
416	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
417	>	public void testGetHoldCount(boolean fair) {
418	>	ReentrantLock lock = new ReentrantLock(fair);
419	>	for (int i = 1; i <= SIZE; i++) {
420	>	lock.lock();
421	>	assertEquals(i, lock.getHoldCount());
422	>	}
423	>	for (int i = SIZE; i > 0; i--) {
424		lock.unlock();
425	<	} catch(Exception e){
122	<	fail("unexpected exception");
425	>	assertEquals(i-1, lock.getHoldCount());
426		}
427	<	}
428	<
429	<	public void testGetHoldCount() {
430	<	ReentrantLock lock = new ReentrantLock();
431	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
432	<	lock.lock();
433	<	assertEquals(i,lock.getHoldCount());
434	<	}
435	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
436	<	lock.unlock();
437	<	assertEquals(i-1,lock.getHoldCount());
438	<	}
136	<	}
137	<
138	<
139	<
140	<
141	<	public void testIsLocked() {
142	<	final ReentrantLock lock = new ReentrantLock();
143	<	lock.lock();
144	<	assertTrue(lock.isLocked());
145	<	lock.unlock();
146	<	assertFalse(lock.isLocked());
147	<	Thread t = new Thread(new Runnable() {
148	<	public void run() {
149	<	lock.lock();
150	<	try {
151	<	Thread.sleep(SHORT_DELAY_MS * 2);
152	<	}
153	<	catch(Exception e) {}
154	<	lock.unlock();
155	<	}
156	<	});
157	<	try{
158	<	t.start();
159	<	Thread.sleep(SHORT_DELAY_MS);
427	>	}
428	>
429	>	/**
430	>	* isLocked is true when locked and false when not
431	>	*/
432	>	public void testIsLocked()      { testIsLocked(false); }
433	>	public void testIsLocked_fair() { testIsLocked(true); }
434	>	public void testIsLocked(boolean fair) {
435	>	try {
436	>	final ReentrantLock lock = new ReentrantLock(fair);
437	>	assertFalse(lock.isLocked());
438	>	lock.lock();
439		assertTrue(lock.isLocked());
440	<	t.join();
440	>	lock.lock();
441	>	assertTrue(lock.isLocked());
442	>	lock.unlock();
443	>	assertTrue(lock.isLocked());
444	>	lock.unlock();
445		assertFalse(lock.isLocked());
446	<	} catch(Exception e){
447	<	fail("unexpected exception");
446	>	final CyclicBarrier barrier = new CyclicBarrier(2);
447	>	Thread t = newStartedThread(new CheckedRunnable() {
448	>	public void realRun() throws Exception {
449	>	lock.lock();
450	>	assertTrue(lock.isLocked());
451	>	barrier.await();
452	>	barrier.await();
453	>	lock.unlock();
454	>	}});
455	>
456	>	barrier.await();
457	>	assertTrue(lock.isLocked());
458	>	barrier.await();
459	>	awaitTermination(t);
460	>	assertFalse(lock.isLocked());
461	>	} catch (Exception e) {
462	>	threadUnexpectedException(e);
463		}
464		}
465
466	<
467	<	public void testLockInterruptibly() {
468	<	final ReentrantLock lock = new ReentrantLock();
469	<	try {
470	<	lock.lockInterruptibly();
471	<	} catch(Exception e) {
472	<	fail("unexpected exception");
175	<	}
176	<	Thread t = new Thread(new Runnable() {
177	<	public void run() {
178	<	try {
179	<	lock.lockInterruptibly();
180	<	fail("should throw");
181	<	}
182	<	catch(InterruptedException e) {}
183	<	}
184	<	});
466	>	/**
467	>	* lockInterruptibly succeeds when unlocked, else is interruptible
468	>	*/
469	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
470	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
471	>	public void testLockInterruptibly(boolean fair) {
472	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
473		try {
474	<	t.start();
475	<	t.interrupt();
476	<	assertTrue(lock.isLocked());
189	<	assertTrue(lock.isHeldByCurrentThread());
190	<	t.join();
191	<	} catch(Exception e){
192	<	fail("unexpected exception");
474	>	lock.lockInterruptibly();
475	>	} catch (InterruptedException ie) {
476	>	threadUnexpectedException(ie);
477		}
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	<	}
217	<	catch (IllegalMonitorStateException success) {
218	<	}
219	<	catch (Exception ex) {
220	<	fail("should throw IMSE");
221	<	}
517	>	shouldThrow();
518	>	} catch (IllegalMonitorStateException success) {}
519		}
520
521	<	public void testAwaitNanos_Timeout() {
522	<	final ReentrantLock lock = new ReentrantLock();
523	<	final Condition c = lock.newCondition();
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		try {
528	+	final ReentrantLock lock = new ReentrantLock(fair);
529	+	final Condition c = lock.newCondition();
530		lock.lock();
531	<	long t = c.awaitNanos(100);
532	<	assertTrue(t <= 0);
531	>	long startTime = System.nanoTime();
532	>	long timeoutMillis = 10;
533	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
534	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
535	>	assertTrue(nanosRemaining <= 0);
536	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
537		lock.unlock();
538	<	}
539	<	catch (Exception ex) {
234	<	fail("unexpected exception");
538	>	} catch (InterruptedException e) {
539	>	threadUnexpectedException(e);
540		}
541		}
542
543	<	public void testAwait_Timeout() {
544	<	final ReentrantLock lock = new ReentrantLock();
545	<	final Condition c = lock.newCondition();
543	>	/**
544	>	* timed await without a signal times out
545	>	*/
546	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
547	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
548	>	public void testAwait_Timeout(boolean fair) {
549		try {
550	+	final ReentrantLock lock = new ReentrantLock(fair);
551	+	final Condition c = lock.newCondition();
552		lock.lock();
553	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
553	>	long startTime = System.nanoTime();
554	>	long timeoutMillis = 10;
555	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
556	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
557		lock.unlock();
558	<	}
559	<	catch (Exception ex) {
247	<	fail("unexpected exception");
558	>	} catch (InterruptedException e) {
559	>	threadUnexpectedException(e);
560		}
561		}
562
563	<	public void testAwaitUntil_Timeout() {
564	<	final ReentrantLock lock = new ReentrantLock();
565	<	final Condition c = lock.newCondition();
563	>	/**
564	>	* awaitUntil without a signal times out
565	>	*/
566	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
567	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
568	>	public void testAwaitUntil_Timeout(boolean fair) {
569		try {
570	+	final ReentrantLock lock = new ReentrantLock(fair);
571	+	final Condition c = lock.newCondition();
572		lock.lock();
573	+	long startTime = System.nanoTime();
574	+	long timeoutMillis = 10;
575		java.util.Date d = new java.util.Date();
576	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
576	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
577	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
578		lock.unlock();
579	<	}
580	<	catch (Exception ex) {
261	<	fail("unexpected exception");
579	>	} catch (InterruptedException e) {
580	>	threadUnexpectedException(e);
581		}
582		}
583
584	<	public void testAwait() {
585	<	final ReentrantLock lock = new ReentrantLock();
584	>	/**
585	>	* await returns when signalled
586	>	*/
587	>	public void testAwait()      { testAwait(false); }
588	>	public void testAwait_fair() { testAwait(true); }
589	>	public void testAwait(boolean fair) {
590	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
591		final Condition c = lock.newCondition();
592	<	Thread t = new Thread(new Runnable() {
593	<	public void run() {
594	<	try {
595	<	lock.lock();
596	<	c.await();
597	<	lock.unlock();
598	<	}
599	<	catch(InterruptedException e) {
600	<	fail("unexpected exception");
601	<	}
602	<	}
603	<	});
592	>	final CountDownLatch locked = new CountDownLatch(1);
593	>	Thread t = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	lock.lock();
596	>	locked.countDown();
597	>	c.await();
598	>	lock.unlock();
599	>	}});
600	>
601	>	await(locked);
602	>	lock.lock();
603	>	assertHasWaiters(lock, c, t);
604	>	c.signal();
605	>	assertHasNoWaiters(lock, c);
606	>	assertTrue(t.isAlive());
607	>	lock.unlock();
608	>	awaitTermination(t);
609	>	}
610
611	+	/**
612	+	* hasWaiters throws NPE if null
613	+	*/
614	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
615	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
616	+	public void testHasWaitersNPE(boolean fair) {
617	+	final ReentrantLock lock = new ReentrantLock(fair);
618		try {
619	<	t.start();
620	<	Thread.sleep(SHORT_DELAY_MS);
621	<	lock.lock();
285	<	c.signal();
286	<	lock.unlock();
287	<	t.join(SHORT_DELAY_MS);
288	<	assertFalse(t.isAlive());
289	<	}
290	<	catch (Exception ex) {
291	<	fail("unexpected exception");
292	<	}
619	>	lock.hasWaiters(null);
620	>	shouldThrow();
621	>	} catch (NullPointerException success) {}
622		}
623
624	<	public void testAwaitUninterruptibly() {
625	<	final ReentrantLock lock = new ReentrantLock();
626	<	final Condition c = lock.newCondition();
627	<	Thread t = new Thread(new Runnable() {
628	<	public void run() {
629	<	lock.lock();
630	<	c.awaitUninterruptibly();
631	<	lock.unlock();
632	<	}
633	<	});
624	>	/**
625	>	* getWaitQueueLength throws NPE if null
626	>	*/
627	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
628	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
629	>	public void testGetWaitQueueLengthNPE(boolean fair) {
630	>	final ReentrantLock lock = new ReentrantLock(fair);
631	>	try {
632	>	lock.getWaitQueueLength(null);
633	>	shouldThrow();
634	>	} catch (NullPointerException success) {}
635	>	}
636
637	+	/**
638	+	* getWaitingThreads throws NPE if null
639	+	*/
640	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
641	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
642	+	public void testGetWaitingThreadsNPE(boolean fair) {
643	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
644		try {
645	<	t.start();
646	<	Thread.sleep(SHORT_DELAY_MS);
647	<	t.interrupt();
310	<	lock.lock();
311	<	c.signal();
312	<	lock.unlock();
313	<	t.join(SHORT_DELAY_MS);
314	<	assertFalse(t.isAlive());
315	<	}
316	<	catch (Exception ex) {
317	<	fail("unexpected exception");
318	<	}
645	>	lock.getWaitingThreads(null);
646	>	shouldThrow();
647	>	} catch (NullPointerException success) {}
648		}
649
650	<	public void testAwait_Interrupt() {
651	<	final ReentrantLock lock = new ReentrantLock();
650	>	/**
651	>	* hasWaiters throws IllegalArgumentException if not owned
652	>	*/
653	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
654	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
655	>	public void testHasWaitersIAE(boolean fair) {
656	>	final ReentrantLock lock = new ReentrantLock(fair);
657		final Condition c = lock.newCondition();
658	<	Thread t = new Thread(new Runnable() {
325	<	public void run() {
326	<	try {
327	<	lock.lock();
328	<	c.await();
329	<	lock.unlock();
330	<	fail("should throw");
331	<	}
332	<	catch(InterruptedException success) {
333	<	}
334	<	}
335	<	});
336	<
658	>	final ReentrantLock lock2 = new ReentrantLock(fair);
659		try {
660	<	t.start();
661	<	Thread.sleep(SHORT_DELAY_MS);
662	<	t.interrupt();
341	<	t.join(SHORT_DELAY_MS);
342	<	assertFalse(t.isAlive());
343	<	}
344	<	catch (Exception ex) {
345	<	fail("unexpected exception");
346	<	}
660	>	lock2.hasWaiters(c);
661	>	shouldThrow();
662	>	} catch (IllegalArgumentException success) {}
663		}
664
665	<	public void testAwaitNanos_Interrupt() {
666	<	final ReentrantLock lock = new ReentrantLock();
665	>	/**
666	>	* hasWaiters throws IllegalMonitorStateException if not locked
667	>	*/
668	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
669	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
670	>	public void testHasWaitersIMSE(boolean fair) {
671	>	final ReentrantLock lock = new ReentrantLock(fair);
672		final Condition c = lock.newCondition();
673	<	Thread t = new Thread(new Runnable() {
674	<	public void run() {
675	<	try {
676	<	lock.lock();
356	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
357	<	lock.unlock();
358	<	fail("should throw");
359	<	}
360	<	catch(InterruptedException success) {
361	<	}
362	<	}
363	<	});
364	<
365	<	try {
366	<	t.start();
367	<	Thread.sleep(SHORT_DELAY_MS);
368	<	t.interrupt();
369	<	t.join(SHORT_DELAY_MS);
370	<	assertFalse(t.isAlive());
371	<	}
372	<	catch (Exception ex) {
373	<	fail("unexpected exception");
374	<	}
673	>	try {
674	>	lock.hasWaiters(c);
675	>	shouldThrow();
676	>	} catch (IllegalMonitorStateException success) {}
677		}
678
679	<	public void testAwaitUntil_Interrupt() {
680	<	final ReentrantLock lock = new ReentrantLock();
681	<	final Condition c = lock.newCondition();
682	<	Thread t = new Thread(new Runnable() {
683	<	public void run() {
684	<	try {
685	<	lock.lock();
686	<	java.util.Date d = new java.util.Date();
687	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
688	<	lock.unlock();
689	<	fail("should throw");
690	<	}
691	<	catch(InterruptedException success) {
692	<	}
391	<	}
392	<	});
679	>	/**
680	>	* getWaitQueueLength throws IllegalArgumentException if not owned
681	>	*/
682	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
683	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
684	>	public void testGetWaitQueueLengthIAE(boolean fair) {
685	>	final ReentrantLock lock = new ReentrantLock(fair);
686	>	final Condition c = lock.newCondition();
687	>	final ReentrantLock lock2 = new ReentrantLock(fair);
688	>	try {
689	>	lock2.getWaitQueueLength(c);
690	>	shouldThrow();
691	>	} catch (IllegalArgumentException success) {}
692	>	}
693
694	+	/**
695	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
696	+	*/
697	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
698	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
699	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
700	+	final ReentrantLock lock = new ReentrantLock(fair);
701	+	final Condition c = lock.newCondition();
702		try {
703	<	t.start();
704	<	Thread.sleep(SHORT_DELAY_MS);
705	<	t.interrupt();
398	<	t.join(SHORT_DELAY_MS);
399	<	assertFalse(t.isAlive());
400	<	}
401	<	catch (Exception ex) {
402	<	fail("unexpected exception");
403	<	}
703	>	lock.getWaitQueueLength(c);
704	>	shouldThrow();
705	>	} catch (IllegalMonitorStateException success) {}
706		}
707
708	<	public void testSignalAll() {
709	<	final ReentrantLock lock = new ReentrantLock();
708	>	/**
709	>	* getWaitingThreads throws IllegalArgumentException if not owned
710	>	*/
711	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
712	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
713	>	public void testGetWaitingThreadsIAE(boolean fair) {
714	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
715		final Condition c = lock.newCondition();
716	<	Thread t1 = new Thread(new Runnable() {
717	<	public void run() {
718	<	try {
719	<	lock.lock();
720	<	c.await();
721	<	lock.unlock();
415	<	}
416	<	catch(InterruptedException e) {
417	<	fail("unexpected exception");
418	<	}
419	<	}
420	<	});
421	<
422	<	Thread t2 = new Thread(new Runnable() {
423	<	public void run() {
424	<	try {
425	<	lock.lock();
426	<	c.await();
427	<	lock.unlock();
428	<	}
429	<	catch(InterruptedException e) {
430	<	fail("unexpected exception");
431	<	}
432	<	}
433	<	});
716	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
717	>	try {
718	>	lock2.getWaitingThreads(c);
719	>	shouldThrow();
720	>	} catch (IllegalArgumentException success) {}
721	>	}
722
723	+	/**
724	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
725	+	*/
726	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
727	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
728	+	public void testGetWaitingThreadsIMSE(boolean fair) {
729	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
730	+	final Condition c = lock.newCondition();
731		try {
732	<	t1.start();
733	<	t2.start();
734	<	Thread.sleep(SHORT_DELAY_MS);
439	<	lock.lock();
440	<	c.signalAll();
441	<	lock.unlock();
442	<	t1.join(SHORT_DELAY_MS);
443	<	t2.join(SHORT_DELAY_MS);
444	<	assertFalse(t1.isAlive());
445	<	assertFalse(t2.isAlive());
446	<	}
447	<	catch (Exception ex) {
448	<	fail("unexpected exception");
449	<	}
732	>	lock.getWaitingThreads(c);
733	>	shouldThrow();
734	>	} catch (IllegalMonitorStateException success) {}
735		}
736
737	<	public void testSerialization() {
738	<	ReentrantLock l = new ReentrantLock();
739	<	l.lock();
740	<	l.unlock();
741	<
742	<	try {
743	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
744	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
745	<	out.writeObject(l);
746	<	out.close();
747	<
748	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
749	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
750	<	ReentrantLock r = (ReentrantLock) in.readObject();
751	<	r.lock();
752	<	r.unlock();
753	<	} catch(Exception e){
754	<	e.printStackTrace();
755	<	fail("unexpected exception");
756	<	}
737	>	/**
738	>	* hasWaiters returns true when a thread is waiting, else false
739	>	*/
740	>	public void testHasWaiters()      { testHasWaiters(false); }
741	>	public void testHasWaiters_fair() { testHasWaiters(true); }
742	>	public void testHasWaiters(boolean fair) {
743	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
744	>	final Condition c = lock.newCondition();
745	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
746	>	Thread t = newStartedThread(new CheckedRunnable() {
747	>	public void realRun() throws InterruptedException {
748	>	lock.lock();
749	>	assertHasNoWaiters(lock, c);
750	>	assertFalse(lock.hasWaiters(c));
751	>	pleaseSignal.countDown();
752	>	c.await();
753	>	assertHasNoWaiters(lock, c);
754	>	assertFalse(lock.hasWaiters(c));
755	>	lock.unlock();
756	>	}});
757	>
758	>	await(pleaseSignal);
759	>	lock.lock();
760	>	assertHasWaiters(lock, c, t);
761	>	assertTrue(lock.hasWaiters(c));
762	>	c.signal();
763	>	assertHasNoWaiters(lock, c);
764	>	assertFalse(lock.hasWaiters(c));
765	>	lock.unlock();
766	>	awaitTermination(t);
767	>	assertHasNoWaiters(lock, c);
768	>	}
769	>
770	>	/**
771	>	* getWaitQueueLength returns number of waiting threads
772	>	*/
773	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
774	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
775	>	public void testGetWaitQueueLength(boolean fair) {
776	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
777	>	final Condition c = lock.newCondition();
778	>	final CountDownLatch locked1 = new CountDownLatch(1);
779	>	final CountDownLatch locked2 = new CountDownLatch(1);
780	>	Thread t1 = new Thread(new CheckedRunnable() {
781	>	public void realRun() throws InterruptedException {
782	>	lock.lock();
783	>	assertFalse(lock.hasWaiters(c));
784	>	assertEquals(0, lock.getWaitQueueLength(c));
785	>	locked1.countDown();
786	>	c.await();
787	>	lock.unlock();
788	>	}});
789	>
790	>	Thread t2 = new Thread(new CheckedRunnable() {
791	>	public void realRun() throws InterruptedException {
792	>	lock.lock();
793	>	assertTrue(lock.hasWaiters(c));
794	>	assertEquals(1, lock.getWaitQueueLength(c));
795	>	locked2.countDown();
796	>	c.await();
797	>	lock.unlock();
798	>	}});
799	>
800	>	lock.lock();
801	>	assertEquals(0, lock.getWaitQueueLength(c));
802	>	lock.unlock();
803	>
804	>	t1.start();
805	>	await(locked1);
806	>
807	>	lock.lock();
808	>	assertHasWaiters(lock, c, t1);
809	>	assertEquals(1, lock.getWaitQueueLength(c));
810	>	lock.unlock();
811	>
812	>	t2.start();
813	>	await(locked2);
814	>
815	>	lock.lock();
816	>	assertHasWaiters(lock, c, t1, t2);
817	>	assertEquals(2, lock.getWaitQueueLength(c));
818	>	c.signalAll();
819	>	assertHasNoWaiters(lock, c);
820	>	lock.unlock();
821	>
822	>	awaitTermination(t1);
823	>	awaitTermination(t2);
824	>
825	>	assertHasNoWaiters(lock, c);
826	>	}
827	>
828	>	/**
829	>	* getWaitingThreads returns only and all waiting threads
830	>	*/
831	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
832	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
833	>	public void testGetWaitingThreads(boolean fair) {
834	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
835	>	final Condition c = lock.newCondition();
836	>	final CountDownLatch locked1 = new CountDownLatch(1);
837	>	final CountDownLatch locked2 = new CountDownLatch(1);
838	>	Thread t1 = new Thread(new CheckedRunnable() {
839	>	public void realRun() throws InterruptedException {
840	>	lock.lock();
841	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
842	>	locked1.countDown();
843	>	c.await();
844	>	lock.unlock();
845	>	}});
846	>
847	>	Thread t2 = new Thread(new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	lock.lock();
850	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
851	>	locked2.countDown();
852	>	c.await();
853	>	lock.unlock();
854	>	}});
855	>
856	>	lock.lock();
857	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
858	>	lock.unlock();
859	>
860	>	t1.start();
861	>	await(locked1);
862	>
863	>	lock.lock();
864	>	assertHasWaiters(lock, c, t1);
865	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
866	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
867	>	assertEquals(1, lock.getWaitingThreads(c).size());
868	>	lock.unlock();
869	>
870	>	t2.start();
871	>	await(locked2);
872	>
873	>	lock.lock();
874	>	assertHasWaiters(lock, c, t1, t2);
875	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
876	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
877	>	assertEquals(2, lock.getWaitingThreads(c).size());
878	>	c.signalAll();
879	>	assertHasNoWaiters(lock, c);
880	>	lock.unlock();
881	>
882	>	awaitTermination(t1);
883	>	awaitTermination(t2);
884	>
885	>	assertHasNoWaiters(lock, c);
886	>	}
887	>
888	>	/**
889	>	* awaitUninterruptibly is uninterruptible
890	>	*/
891	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
892	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
893	>	public void testAwaitUninterruptibly(boolean fair) {
894	>	final ReentrantLock lock = new ReentrantLock(fair);
895	>	final Condition c = lock.newCondition();
896	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
897	>
898	>	Thread t1 = newStartedThread(new CheckedRunnable() {
899	>	public void realRun() {
900	>	// Interrupt before awaitUninterruptibly
901	>	lock.lock();
902	>	pleaseInterrupt.countDown();
903	>	Thread.currentThread().interrupt();
904	>	c.awaitUninterruptibly();
905	>	assertTrue(Thread.interrupted());
906	>	lock.unlock();
907	>	}});
908	>
909	>	Thread t2 = newStartedThread(new CheckedRunnable() {
910	>	public void realRun() {
911	>	// Interrupt during awaitUninterruptibly
912	>	lock.lock();
913	>	pleaseInterrupt.countDown();
914	>	c.awaitUninterruptibly();
915	>	assertTrue(Thread.interrupted());
916	>	lock.unlock();
917	>	}});
918	>
919	>	await(pleaseInterrupt);
920	>	lock.lock();
921	>	lock.unlock();
922	>	t2.interrupt();
923	>
924	>	assertThreadStaysAlive(t1);
925	>	assertTrue(t2.isAlive());
926	>
927	>	lock.lock();
928	>	c.signalAll();
929	>	lock.unlock();
930	>
931	>	awaitTermination(t1);
932	>	awaitTermination(t2);
933	>	}
934	>
935	>	/**
936	>	* await/awaitNanos/awaitUntil is interruptible
937	>	*/
938	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
939	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
940	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
941	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
942	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
943	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
944	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
945	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
946	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
947	>	final PublicReentrantLock lock =
948	>	new PublicReentrantLock(fair);
949	>	final Condition c = lock.newCondition();
950	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
951	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
952	>	public void realRun() throws InterruptedException {
953	>	lock.lock();
954	>	assertLockedByMoi(lock);
955	>	assertHasNoWaiters(lock, c);
956	>	pleaseInterrupt.countDown();
957	>	try {
958	>	await(c, awaitMethod);
959	>	} finally {
960	>	assertLockedByMoi(lock);
961	>	assertHasNoWaiters(lock, c);
962	>	lock.unlock();
963	>	assertFalse(Thread.interrupted());
964	>	}
965	>	}});
966	>
967	>	await(pleaseInterrupt);
968	>	assertHasWaiters(lock, c, t);
969	>	t.interrupt();
970	>	awaitTermination(t);
971	>	assertNotLocked(lock);
972	>	}
973	>
974	>	/**
975	>	* signalAll wakes up all threads
976	>	*/
977	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
978	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
979	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
980	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
981	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
982	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
983	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
984	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
985	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
986	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
987	>	final Condition c = lock.newCondition();
988	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
989	>	class Awaiter extends CheckedRunnable {
990	>	public void realRun() throws InterruptedException {
991	>	lock.lock();
992	>	pleaseSignal.countDown();
993	>	await(c, awaitMethod);
994	>	lock.unlock();
995	>	}
996	>	}
997	>
998	>	Thread t1 = newStartedThread(new Awaiter());
999	>	Thread t2 = newStartedThread(new Awaiter());
1000	>
1001	>	await(pleaseSignal);
1002	>	lock.lock();
1003	>	assertHasWaiters(lock, c, t1, t2);
1004	>	c.signalAll();
1005	>	assertHasNoWaiters(lock, c);
1006	>	lock.unlock();
1007	>	awaitTermination(t1);
1008	>	awaitTermination(t2);
1009		}
1010
1011	+	/**
1012	+	* signal wakes up waiting threads in FIFO order
1013	+	*/
1014	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1015	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1016	+	public void testSignalWakesFifo(boolean fair) {
1017	+	final PublicReentrantLock lock =
1018	+	new PublicReentrantLock(fair);
1019	+	final Condition c = lock.newCondition();
1020	+	final CountDownLatch locked1 = new CountDownLatch(1);
1021	+	final CountDownLatch locked2 = new CountDownLatch(1);
1022	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1023	+	public void realRun() throws InterruptedException {
1024	+	lock.lock();
1025	+	locked1.countDown();
1026	+	c.await();
1027	+	lock.unlock();
1028	+	}});
1029	+
1030	+	await(locked1);
1031	+
1032	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1033	+	public void realRun() throws InterruptedException {
1034	+	lock.lock();
1035	+	locked2.countDown();
1036	+	c.await();
1037	+	lock.unlock();
1038	+	}});
1039	+
1040	+	await(locked2);
1041	+
1042	+	lock.lock();
1043	+	assertHasWaiters(lock, c, t1, t2);
1044	+	assertFalse(lock.hasQueuedThreads());
1045	+	c.signal();
1046	+	assertHasWaiters(lock, c, t2);
1047	+	assertTrue(lock.hasQueuedThread(t1));
1048	+	assertFalse(lock.hasQueuedThread(t2));
1049	+	c.signal();
1050	+	assertHasNoWaiters(lock, c);
1051	+	assertTrue(lock.hasQueuedThread(t1));
1052	+	assertTrue(lock.hasQueuedThread(t2));
1053	+	lock.unlock();
1054	+	awaitTermination(t1);
1055	+	awaitTermination(t2);
1056	+	}
1057	+
1058	+	/**
1059	+	* await after multiple reentrant locking preserves lock count
1060	+	*/
1061	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1062	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1063	+	public void testAwaitLockCount(boolean fair) {
1064	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1065	+	final Condition c = lock.newCondition();
1066	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1067	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1068	+	public void realRun() throws InterruptedException {
1069	+	lock.lock();
1070	+	assertLockedByMoi(lock);
1071	+	assertEquals(1, lock.getHoldCount());
1072	+	pleaseSignal.countDown();
1073	+	c.await();
1074	+	assertLockedByMoi(lock);
1075	+	assertEquals(1, lock.getHoldCount());
1076	+	lock.unlock();
1077	+	}});
1078	+
1079	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1080	+	public void realRun() throws InterruptedException {
1081	+	lock.lock();
1082	+	lock.lock();
1083	+	assertLockedByMoi(lock);
1084	+	assertEquals(2, lock.getHoldCount());
1085	+	pleaseSignal.countDown();
1086	+	c.await();
1087	+	assertLockedByMoi(lock);
1088	+	assertEquals(2, lock.getHoldCount());
1089	+	lock.unlock();
1090	+	lock.unlock();
1091	+	}});
1092	+
1093	+	await(pleaseSignal);
1094	+	lock.lock();
1095	+	assertHasWaiters(lock, c, t1, t2);
1096	+	assertEquals(1, lock.getHoldCount());
1097	+	c.signalAll();
1098	+	assertHasNoWaiters(lock, c);
1099	+	lock.unlock();
1100	+	awaitTermination(t1);
1101	+	awaitTermination(t2);
1102	+	}
1103	+
1104	+	/**
1105	+	* A serialized lock deserializes as unlocked
1106	+	*/
1107	+	public void testSerialization()      { testSerialization(false); }
1108	+	public void testSerialization_fair() { testSerialization(true); }
1109	+	public void testSerialization(boolean fair) {
1110	+	ReentrantLock lock = new ReentrantLock(fair);
1111	+	lock.lock();
1112	+
1113	+	ReentrantLock clone = serialClone(lock);
1114	+	assertEquals(lock.isFair(), clone.isFair());
1115	+	assertTrue(lock.isLocked());
1116	+	assertFalse(clone.isLocked());
1117	+	assertEquals(1, lock.getHoldCount());
1118	+	assertEquals(0, clone.getHoldCount());
1119	+	clone.lock();
1120	+	clone.lock();
1121	+	assertTrue(clone.isLocked());
1122	+	assertEquals(2, clone.getHoldCount());
1123	+	assertEquals(1, lock.getHoldCount());
1124	+	clone.unlock();
1125	+	clone.unlock();
1126	+	assertTrue(lock.isLocked());
1127	+	assertFalse(clone.isLocked());
1128	+	}
1129	+
1130	+	/**
1131	+	* toString indicates current lock state
1132	+	*/
1133	+	public void testToString()      { testToString(false); }
1134	+	public void testToString_fair() { testToString(true); }
1135	+	public void testToString(boolean fair) {
1136	+	ReentrantLock lock = new ReentrantLock(fair);
1137	+	assertTrue(lock.toString().contains("Unlocked"));
1138	+	lock.lock();
1139	+	assertTrue(lock.toString().contains("Locked"));
1140	+	lock.unlock();
1141	+	assertTrue(lock.toString().contains("Unlocked"));
1142	+	}
1143		}

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