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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.2 by dl, Sat Sep 6 19:36:05 2003 UTC vs.
Revision 1.68 by jsr166, Tue Jan 23 20:44:11 2018 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.*;
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.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.HashSet;
15	>	import java.util.concurrent.CountDownLatch;
16	>	import java.util.concurrent.CyclicBarrier;
17	>	import java.util.concurrent.ThreadLocalRandom;
18	>	import java.util.concurrent.locks.Condition;
19	>	import java.util.concurrent.locks.ReentrantLock;
20
21	+	import junit.framework.Test;
22	+	import junit.framework.TestSuite;
23	+
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25	+	public class ReentrantLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
18	–
29		public static Test suite() {
30	<	return new TestSuite(ReentrantLockTest.class);
30	>	return new TestSuite(ReentrantLockTest.class);
31		}
32
33	<	private static long SHORT_DELAY_MS = 100;
34	<	private static long MEDIUM_DELAY_MS = 1000;
35	<	private static long LONG_DELAY_MS = 10000;
36	<
37	<	/*
38	<	* Unlocks an unlocked lock, throws Illegal Monitor State
39	<	*
40	<	*/
31	<
32	<	public void testIllegalMonitorStateException(){
33	<	ReentrantLock rl = new ReentrantLock();
34	<	try{
35	<	rl.unlock();
36	<	fail("Should of thown Illegal Monitor State Exception");
37	<
38	<	}catch(IllegalMonitorStateException sucess){}
39	<
40	<
41	<	}
42	<
43	<	/*
44	<	* makes a lock, locks it, tries to aquire the lock in another thread
45	<	* interrupts that thread and waits for an interrupted Exception to
46	<	* be thrown.
47	<	*/
48	<
49	<	public void testInterruptedException(){
50	<	final ReentrantLock lock = new ReentrantLock();
51	<	lock.lock();
52	<	Thread t = new Thread(new Runnable() {
53	<	public void run(){
54	<	try{
55	<	lock.lockInterruptibly();
56	<	fail("should throw");
57	<	}catch(InterruptedException sucess){}
58	<	}
59	<	});
60	<	t.start();
61	<	t.interrupt();
62	<	lock.unlock();
63	<	}
64	<
65	<	/*
66	<	* tests for interrupted exception on a timed wait
67	<	*
68	<	*/
69	<
70	<
71	<	public void testInterruptedException2(){
72	<	final ReentrantLock lock = new ReentrantLock();
73	<	lock.lock();
74	<	Thread t = new Thread(new Runnable() {
75	<	public void run(){
76	<	try{
77	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
78	<	fail("should throw");
79	<	}catch(InterruptedException sucess){}
80	<	}
81	<	});
82	<	t.start();
83	<	t.interrupt();
84	<	}
85	<
86	<
87	<	public void testGetHoldCount() {
88	<	ReentrantLock lock = new ReentrantLock();
89	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
90	<	lock.lock();
91	<	assertEquals(i,lock.getHoldCount());
92	<	}
93	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
94	<	lock.unlock();
95	<	assertEquals(i-1,lock.getHoldCount());
96	<	}
97	<	}
98	<
99	<
100	<
101	<
102	<	public void testIsLocked() {
103	<	final ReentrantLock lock = new ReentrantLock();
104	<	lock.lock();
105	<	assertTrue(lock.isLocked());
106	<	lock.unlock();
107	<	assertFalse(lock.isLocked());
108	<	Thread t = new Thread(new Runnable() {
109	<	public void run() {
110	<	lock.lock();
111	<	try {
112	<	Thread.sleep(SHORT_DELAY_MS * 2);
113	<	}
114	<	catch(Exception e) {}
115	<	lock.unlock();
116	<	}
117	<	});
118	<	try{
119	<	t.start();
120	<	Thread.sleep(SHORT_DELAY_MS);
121	<	assertTrue(lock.isLocked());
122	<	t.join();
123	<	assertFalse(lock.isLocked());
124	<	} catch(Exception e){
125	<	fail("unexpected exception");
33	>	/**
34	>	* A checked runnable calling lockInterruptibly
35	>	*/
36	>	class InterruptibleLockRunnable extends CheckedRunnable {
37	>	final ReentrantLock lock;
38	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
39	>	public void realRun() throws InterruptedException {
40	>	lock.lockInterruptibly();
41		}
127	–
42		}
43
44	<	/*
45	<	* current thread locks interruptibly the thread
46	<	* another thread tries to aquire the lock and blocks
47	<	* on the call. interrupt the attempted aquireLock
48	<	* assert that the first lock() call actually locked the lock
49	<	* assert that the current thread is the one holding the lock
50	<	*/
51	<
52	<	public void testLockedInterruptibly() {
53	<	final ReentrantLock lock = new ReentrantLock();
140	<	try {lock.lockInterruptibly();} catch(Exception e) {}
141	<	Thread t = new Thread(new Runnable() {
142	<	public void run() {
143	<	try {
144	<	lock.lockInterruptibly();
145	<	fail("Failed to generate an Interrupted Exception");
146	<	}
147	<	catch(InterruptedException e) {}
148	<	}
149	<	});
150	<	t.start();
151	<	t.interrupt();
152	<	assertTrue(lock.isLocked());
153	<	assertTrue(lock.isHeldByCurrentThread());
44	>	/**
45	>	* A checked runnable calling lockInterruptibly that expects to be
46	>	* interrupted
47	>	*/
48	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
49	>	final ReentrantLock lock;
50	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
51	>	public void realRun() throws InterruptedException {
52	>	lock.lockInterruptibly();
53	>	}
54		}
55
56	<	public void testAwait_IllegalMonitor() {
57	<	final ReentrantLock lock = new ReentrantLock();
58	<	final Condition c = lock.newCondition();
59	<	try {
60	<	c.await();
61	<	fail("should throw");
56	>	/**
57	>	* Subclass to expose protected methods
58	>	*/
59	>	static class PublicReentrantLock extends ReentrantLock {
60	>	PublicReentrantLock() { super(); }
61	>	PublicReentrantLock(boolean fair) { super(fair); }
62	>	public Thread getOwner() {
63	>	return super.getOwner();
64		}
65	<	catch (IllegalMonitorStateException success) {
65	>	public Collection<Thread> getQueuedThreads() {
66	>	return super.getQueuedThreads();
67		}
68	<	catch (Exception ex) {
69	<	fail("should throw IMSE");
68	>	public Collection<Thread> getWaitingThreads(Condition c) {
69	>	return super.getWaitingThreads(c);
70		}
71		}
72
73	<	public void testSignal_IllegalMonitor() {
74	<	final ReentrantLock lock = new ReentrantLock();
75	<	final Condition c = lock.newCondition();
76	<	try {
77	<	c.signal();
78	<	fail("should throw");
79	<	}
80	<	catch (IllegalMonitorStateException success) {
73	>	/**
74	>	* Releases write lock, checking that it had a hold count of 1.
75	>	*/
76	>	void releaseLock(PublicReentrantLock lock) {
77	>	assertLockedByMoi(lock);
78	>	lock.unlock();
79	>	assertFalse(lock.isHeldByCurrentThread());
80	>	assertNotLocked(lock);
81	>	}
82	>
83	>	/**
84	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
85	>	*/
86	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
87	>	long startTime = System.nanoTime();
88	>	while (!lock.hasQueuedThread(t)) {
89	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	>	throw new AssertionError("timed out");
91	>	Thread.yield();
92		}
93	<	catch (Exception ex) {
94	<	fail("should throw IMSE");
93	>	assertTrue(t.isAlive());
94	>	assertNotSame(t, lock.getOwner());
95	>	}
96	>
97	>	/**
98	>	* Checks that lock is not locked.
99	>	*/
100	>	void assertNotLocked(PublicReentrantLock lock) {
101	>	assertFalse(lock.isLocked());
102	>	assertFalse(lock.isHeldByCurrentThread());
103	>	assertNull(lock.getOwner());
104	>	assertEquals(0, lock.getHoldCount());
105	>	}
106	>
107	>	/**
108	>	* Checks that lock is locked by the given thread.
109	>	*/
110	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
111	>	assertTrue(lock.isLocked());
112	>	assertSame(t, lock.getOwner());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.isHeldByCurrentThread());
115	>	assertEquals(t == Thread.currentThread(),
116	>	lock.getHoldCount() > 0);
117	>	}
118	>
119	>	/**
120	>	* Checks that lock is locked by the current thread.
121	>	*/
122	>	void assertLockedByMoi(PublicReentrantLock lock) {
123	>	assertLockedBy(lock, Thread.currentThread());
124	>	}
125	>
126	>	/**
127	>	* Checks that condition c has no waiters.
128	>	*/
129	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
130	>	assertHasWaiters(lock, c, new Thread[] {});
131	>	}
132	>
133	>	/**
134	>	* Checks that condition c has exactly the given waiter threads.
135	>	*/
136	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
137	>	Thread... threads) {
138	>	lock.lock();
139	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
140	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
141	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
142	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
143	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
144	>	new HashSet<Thread>(Arrays.asList(threads)));
145	>	lock.unlock();
146	>	}
147	>
148	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
149	>
150	>	static AwaitMethod randomAwaitMethod() {
151	>	AwaitMethod[] awaitMethods = AwaitMethod.values();
152	>	return awaitMethods[ThreadLocalRandom.current().nextInt(awaitMethods.length)];
153	>	}
154	>
155	>	/**
156	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
157	>	*/
158	>	void await(Condition c, AwaitMethod awaitMethod)
159	>	throws InterruptedException {
160	>	long timeoutMillis = 2 * LONG_DELAY_MS;
161	>	switch (awaitMethod) {
162	>	case await:
163	>	c.await();
164	>	break;
165	>	case awaitTimed:
166	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
167	>	break;
168	>	case awaitNanos:
169	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
170	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
171	>	assertTrue(nanosRemaining > timeoutNanos / 2);
172	>	assertTrue(nanosRemaining <= timeoutNanos);
173	>	break;
174	>	case awaitUntil:
175	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
176	>	break;
177	>	default:
178	>	throw new AssertionError();
179		}
180		}
181
182	<	public void testAwaitNanos_Timeout() {
183	<	final ReentrantLock lock = new ReentrantLock();
184	<	final Condition c = lock.newCondition();
182	>	/**
183	>	* Constructor sets given fairness, and is in unlocked state
184	>	*/
185	>	public void testConstructor() {
186	>	PublicReentrantLock lock;
187	>
188	>	lock = new PublicReentrantLock();
189	>	assertFalse(lock.isFair());
190	>	assertNotLocked(lock);
191	>
192	>	lock = new PublicReentrantLock(true);
193	>	assertTrue(lock.isFair());
194	>	assertNotLocked(lock);
195	>
196	>	lock = new PublicReentrantLock(false);
197	>	assertFalse(lock.isFair());
198	>	assertNotLocked(lock);
199	>	}
200	>
201	>	/**
202	>	* locking an unlocked lock succeeds
203	>	*/
204	>	public void testLock()      { testLock(false); }
205	>	public void testLock_fair() { testLock(true); }
206	>	public void testLock(boolean fair) {
207	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
208	>	lock.lock();
209	>	assertLockedByMoi(lock);
210	>	releaseLock(lock);
211	>	}
212	>
213	>	/**
214	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
215	>	*/
216	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
217	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
218	>	public void testUnlock_IMSE(boolean fair) {
219	>	final ReentrantLock lock = new ReentrantLock(fair);
220		try {
188	–	lock.lock();
189	–	long t = c.awaitNanos(100);
190	–	assertTrue(t <= 0);
221		lock.unlock();
222	<	}
223	<	catch (Exception ex) {
194	<	fail("unexpected exception");
195	<	}
222	>	shouldThrow();
223	>	} catch (IllegalMonitorStateException success) {}
224		}
225
226	<	public void testAwait_Timeout() {
227	<	final ReentrantLock lock = new ReentrantLock();
228	<	final Condition c = lock.newCondition();
226	>	/**
227	>	* tryLock on an unlocked lock succeeds
228	>	*/
229	>	public void testTryLock()      { testTryLock(false); }
230	>	public void testTryLock_fair() { testTryLock(true); }
231	>	public void testTryLock(boolean fair) {
232	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
233	>	assertTrue(lock.tryLock());
234	>	assertLockedByMoi(lock);
235	>	assertTrue(lock.tryLock());
236	>	assertLockedByMoi(lock);
237	>	lock.unlock();
238	>	releaseLock(lock);
239	>	}
240	>
241	>	/**
242	>	* hasQueuedThreads reports whether there are waiting threads
243	>	*/
244	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
245	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
246	>	public void testHasQueuedThreads(boolean fair) {
247	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
248	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
249	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
250	>	assertFalse(lock.hasQueuedThreads());
251	>	lock.lock();
252	>	assertFalse(lock.hasQueuedThreads());
253	>	t1.start();
254	>	waitForQueuedThread(lock, t1);
255	>	assertTrue(lock.hasQueuedThreads());
256	>	t2.start();
257	>	waitForQueuedThread(lock, t2);
258	>	assertTrue(lock.hasQueuedThreads());
259	>	t1.interrupt();
260	>	awaitTermination(t1);
261	>	assertTrue(lock.hasQueuedThreads());
262	>	lock.unlock();
263	>	awaitTermination(t2);
264	>	assertFalse(lock.hasQueuedThreads());
265	>	}
266	>
267	>	/**
268	>	* getQueueLength reports number of waiting threads
269	>	*/
270	>	public void testGetQueueLength()      { testGetQueueLength(false); }
271	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
272	>	public void testGetQueueLength(boolean fair) {
273	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
274	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
275	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
276	>	assertEquals(0, lock.getQueueLength());
277	>	lock.lock();
278	>	t1.start();
279	>	waitForQueuedThread(lock, t1);
280	>	assertEquals(1, lock.getQueueLength());
281	>	t2.start();
282	>	waitForQueuedThread(lock, t2);
283	>	assertEquals(2, lock.getQueueLength());
284	>	t1.interrupt();
285	>	awaitTermination(t1);
286	>	assertEquals(1, lock.getQueueLength());
287	>	lock.unlock();
288	>	awaitTermination(t2);
289	>	assertEquals(0, lock.getQueueLength());
290	>	}
291	>
292	>	/**
293	>	* hasQueuedThread(null) throws NPE
294	>	*/
295	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
296	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
297	>	public void testHasQueuedThreadNPE(boolean fair) {
298	>	final ReentrantLock lock = new ReentrantLock(fair);
299		try {
300	+	lock.hasQueuedThread(null);
301	+	shouldThrow();
302	+	} catch (NullPointerException success) {}
303	+	}
304	+
305	+	/**
306	+	* hasQueuedThread reports whether a thread is queued
307	+	*/
308	+	public void testHasQueuedThread()      { testHasQueuedThread(false); }
309	+	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
310	+	public void testHasQueuedThread(boolean fair) {
311	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
312	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
313	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
314	+	assertFalse(lock.hasQueuedThread(t1));
315	+	assertFalse(lock.hasQueuedThread(t2));
316	+	lock.lock();
317	+	t1.start();
318	+	waitForQueuedThread(lock, t1);
319	+	assertTrue(lock.hasQueuedThread(t1));
320	+	assertFalse(lock.hasQueuedThread(t2));
321	+	t2.start();
322	+	waitForQueuedThread(lock, t2);
323	+	assertTrue(lock.hasQueuedThread(t1));
324	+	assertTrue(lock.hasQueuedThread(t2));
325	+	t1.interrupt();
326	+	awaitTermination(t1);
327	+	assertFalse(lock.hasQueuedThread(t1));
328	+	assertTrue(lock.hasQueuedThread(t2));
329	+	lock.unlock();
330	+	awaitTermination(t2);
331	+	assertFalse(lock.hasQueuedThread(t1));
332	+	assertFalse(lock.hasQueuedThread(t2));
333	+	}
334	+
335	+	/**
336	+	* getQueuedThreads includes waiting threads
337	+	*/
338	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
339	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
340	+	public void testGetQueuedThreads(boolean fair) {
341	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
342	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
343	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
344	+	assertTrue(lock.getQueuedThreads().isEmpty());
345	+	lock.lock();
346	+	assertTrue(lock.getQueuedThreads().isEmpty());
347	+	t1.start();
348	+	waitForQueuedThread(lock, t1);
349	+	assertEquals(1, lock.getQueuedThreads().size());
350	+	assertTrue(lock.getQueuedThreads().contains(t1));
351	+	t2.start();
352	+	waitForQueuedThread(lock, t2);
353	+	assertEquals(2, lock.getQueuedThreads().size());
354	+	assertTrue(lock.getQueuedThreads().contains(t1));
355	+	assertTrue(lock.getQueuedThreads().contains(t2));
356	+	t1.interrupt();
357	+	awaitTermination(t1);
358	+	assertFalse(lock.getQueuedThreads().contains(t1));
359	+	assertTrue(lock.getQueuedThreads().contains(t2));
360	+	assertEquals(1, lock.getQueuedThreads().size());
361	+	lock.unlock();
362	+	awaitTermination(t2);
363	+	assertTrue(lock.getQueuedThreads().isEmpty());
364	+	}
365	+
366	+	/**
367	+	* timed tryLock is interruptible
368	+	*/
369	+	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
370	+	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
371	+	public void testTryLock_Interruptible(boolean fair) {
372	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
373	+	lock.lock();
374	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
375	+	public void realRun() throws InterruptedException {
376	+	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
377	+	}});
378	+
379	+	waitForQueuedThread(lock, t);
380	+	t.interrupt();
381	+	awaitTermination(t);
382	+	releaseLock(lock);
383	+	}
384	+
385	+	/**
386	+	* tryLock on a locked lock fails
387	+	*/
388	+	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
389	+	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
390	+	public void testTryLockWhenLocked(boolean fair) {
391	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
392	+	lock.lock();
393	+	Thread t = newStartedThread(new CheckedRunnable() {
394	+	public void realRun() {
395	+	assertFalse(lock.tryLock());
396	+	}});
397	+
398	+	awaitTermination(t);
399	+	releaseLock(lock);
400	+	}
401	+
402	+	/**
403	+	* Timed tryLock on a locked lock times out
404	+	*/
405	+	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
406	+	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
407	+	public void testTryLock_Timeout(boolean fair) {
408	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
409	+	final long timeoutMillis = timeoutMillis();
410	+	lock.lock();
411	+	Thread t = newStartedThread(new CheckedRunnable() {
412	+	public void realRun() throws InterruptedException {
413	+	long startTime = System.nanoTime();
414	+	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
415	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
416	+	}});
417	+
418	+	awaitTermination(t);
419	+	releaseLock(lock);
420	+	}
421	+
422	+	/**
423	+	* getHoldCount returns number of recursive holds
424	+	*/
425	+	public void testGetHoldCount()      { testGetHoldCount(false); }
426	+	public void testGetHoldCount_fair() { testGetHoldCount(true); }
427	+	public void testGetHoldCount(boolean fair) {
428	+	final ReentrantLock lock = new ReentrantLock(fair);
429	+	for (int i = 1; i <= SIZE; i++) {
430		lock.lock();
431	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
204	<	lock.unlock();
431	>	assertEquals(i, lock.getHoldCount());
432		}
433	<	catch (Exception ex) {
434	<	fail("unexpected exception");
433	>	for (int i = SIZE; i > 0; i--) {
434	>	lock.unlock();
435	>	assertEquals(i - 1, lock.getHoldCount());
436		}
437		}
438
439	<	public void testAwaitUntil_Timeout() {
440	<	final ReentrantLock lock = new ReentrantLock();
441	<	final Condition c = lock.newCondition();
439	>	/**
440	>	* isLocked is true when locked and false when not
441	>	*/
442	>	public void testIsLocked()      { testIsLocked(false); }
443	>	public void testIsLocked_fair() { testIsLocked(true); }
444	>	public void testIsLocked(boolean fair) {
445	>	final ReentrantLock lock = new ReentrantLock(fair);
446		try {
447	+	assertFalse(lock.isLocked());
448	+	lock.lock();
449	+	assertTrue(lock.isLocked());
450		lock.lock();
451	<	java.util.Date d = new java.util.Date();
217	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
451	>	assertTrue(lock.isLocked());
452		lock.unlock();
453	<	}
454	<	catch (Exception ex) {
455	<	fail("unexpected exception");
456	<	}
453	>	assertTrue(lock.isLocked());
454	>	lock.unlock();
455	>	assertFalse(lock.isLocked());
456	>	final CyclicBarrier barrier = new CyclicBarrier(2);
457	>	Thread t = newStartedThread(new CheckedRunnable() {
458	>	public void realRun() throws Exception {
459	>	lock.lock();
460	>	assertTrue(lock.isLocked());
461	>	barrier.await();
462	>	barrier.await();
463	>	lock.unlock();
464	>	}});
465	>
466	>	barrier.await();
467	>	assertTrue(lock.isLocked());
468	>	barrier.await();
469	>	awaitTermination(t);
470	>	assertFalse(lock.isLocked());
471	>	} catch (Exception fail) { threadUnexpectedException(fail); }
472	>	}
473	>
474	>	/**
475	>	* lockInterruptibly succeeds when unlocked, else is interruptible
476	>	*/
477	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
478	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
479	>	public void testLockInterruptibly(boolean fair) {
480	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
481	>	try {
482	>	lock.lockInterruptibly();
483	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
484	>	assertLockedByMoi(lock);
485	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
486	>	waitForQueuedThread(lock, t);
487	>	t.interrupt();
488	>	assertTrue(lock.isLocked());
489	>	assertTrue(lock.isHeldByCurrentThread());
490	>	awaitTermination(t);
491	>	releaseLock(lock);
492		}
493
494	<	public void testAwait() {
495	<	final ReentrantLock lock = new ReentrantLock();
494	>	/**
495	>	* Calling await without holding lock throws IllegalMonitorStateException
496	>	*/
497	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
498	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
499	>	public void testAwait_IMSE(boolean fair) {
500	>	final ReentrantLock lock = new ReentrantLock(fair);
501		final Condition c = lock.newCondition();
502	<	Thread t = new Thread(new Runnable() {
503	<	public void run() {
504	<	try {
505	<	lock.lock();
506	<	c.await();
507	<	lock.unlock();
508	<	}
509	<	catch(InterruptedException e) {
510	<	fail("unexpected exception");
511	<	}
238	<	}
239	<	});
502	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
503	>	long startTime = System.nanoTime();
504	>	try {
505	>	await(c, awaitMethod);
506	>	shouldThrow();
507	>	} catch (IllegalMonitorStateException success) {
508	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
509	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
510	>	}
511	>	}
512
513	+	/**
514	+	* Calling signal without holding lock throws IllegalMonitorStateException
515	+	*/
516	+	public void testSignal_IMSE()      { testSignal_IMSE(false); }
517	+	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
518	+	public void testSignal_IMSE(boolean fair) {
519	+	final ReentrantLock lock = new ReentrantLock(fair);
520	+	final Condition c = lock.newCondition();
521		try {
242	–	t.start();
243	–	Thread.sleep(SHORT_DELAY_MS);
244	–	lock.lock();
522		c.signal();
523	<	lock.unlock();
524	<	t.join(SHORT_DELAY_MS);
248	<	assertFalse(t.isAlive());
249	<	}
250	<	catch (Exception ex) {
251	<	fail("unexpected exception");
252	<	}
523	>	shouldThrow();
524	>	} catch (IllegalMonitorStateException success) {}
525		}
526
527	<	public void testAwaitUninterruptibly() {
528	<	final ReentrantLock lock = new ReentrantLock();
527	>	/**
528	>	* awaitNanos without a signal times out
529	>	*/
530	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
531	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
532	>	public void testAwaitNanos_Timeout(boolean fair) {
533	>	final ReentrantLock lock = new ReentrantLock(fair);
534		final Condition c = lock.newCondition();
535	<	Thread t = new Thread(new Runnable() {
536	<	public void run() {
537	<	lock.lock();
538	<	c.awaitUninterruptibly();
539	<	lock.unlock();
540	<	}
541	<	});
535	>	final long timeoutMillis = timeoutMillis();
536	>	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
537	>	lock.lock();
538	>	final long startTime = System.nanoTime();
539	>	try {
540	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
541	>	assertTrue(nanosRemaining <= 0);
542	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
543	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
544	>	lock.unlock();
545	>	}
546
547	+	/**
548	+	* timed await without a signal times out
549	+	*/
550	+	public void testAwait_Timeout()      { testAwait_Timeout(false); }
551	+	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
552	+	public void testAwait_Timeout(boolean fair) {
553	+	final ReentrantLock lock = new ReentrantLock(fair);
554	+	final Condition c = lock.newCondition();
555	+	final long timeoutMillis = timeoutMillis();
556	+	lock.lock();
557	+	final long startTime = System.nanoTime();
558		try {
559	<	t.start();
560	<	Thread.sleep(SHORT_DELAY_MS);
561	<	t.interrupt();
562	<	lock.lock();
271	<	c.signal();
272	<	lock.unlock();
273	<	t.join(SHORT_DELAY_MS);
274	<	assertFalse(t.isAlive());
275	<	}
276	<	catch (Exception ex) {
277	<	fail("unexpected exception");
278	<	}
559	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
560	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
561	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
562	>	lock.unlock();
563		}
564
565	<	public void testAwait_Interrupt() {
566	<	final ReentrantLock lock = new ReentrantLock();
565	>	/**
566	>	* awaitUntil without a signal times out
567	>	*/
568	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
569	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
570	>	public void testAwaitUntil_Timeout(boolean fair) {
571	>	final ReentrantLock lock = new ReentrantLock(fair);
572		final Condition c = lock.newCondition();
573	<	Thread t = new Thread(new Runnable() {
574	<	public void run() {
575	<	try {
576	<	lock.lock();
577	<	c.await();
578	<	lock.unlock();
579	<	fail("should throw");
580	<	}
581	<	catch(InterruptedException success) {
582	<	}
583	<	}
584	<	});
573	>	lock.lock();
574	>	// We shouldn't assume that nanoTime and currentTimeMillis
575	>	// use the same time source, so don't use nanoTime here.
576	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
577	>	try {
578	>	assertFalse(c.awaitUntil(delayedDate));
579	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
580	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
581	>	lock.unlock();
582	>	}
583	>
584	>	/**
585	>	* await returns when signalled
586	>	*/
587	>	public void testAwait()      { 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	>	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	<	t.interrupt();
301	<	t.join(SHORT_DELAY_MS);
302	<	assertFalse(t.isAlive());
303	<	}
304	<	catch (Exception ex) {
305	<	fail("unexpected exception");
306	<	}
619	>	lock.hasWaiters(null);
620	>	shouldThrow();
621	>	} catch (NullPointerException success) {}
622		}
623
624	<	public void testAwaitNanos_Interrupt() {
625	<	final ReentrantLock lock = new ReentrantLock();
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	>	lock.getWaitingThreads(null);
646	>	shouldThrow();
647	>	} catch (NullPointerException success) {}
648	>	}
649	>
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() {
659	<	public void run() {
660	<	try {
661	<	lock.lock();
662	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
317	<	lock.unlock();
318	<	fail("should throw");
319	<	}
320	<	catch(InterruptedException success) {
321	<	}
322	<	}
323	<	});
324	<
325	<	try {
326	<	t.start();
327	<	Thread.sleep(SHORT_DELAY_MS);
328	<	t.interrupt();
329	<	t.join(SHORT_DELAY_MS);
330	<	assertFalse(t.isAlive());
331	<	}
332	<	catch (Exception ex) {
333	<	fail("unexpected exception");
334	<	}
658	>	final ReentrantLock lock2 = new ReentrantLock(fair);
659	>	try {
660	>	lock2.hasWaiters(c);
661	>	shouldThrow();
662	>	} catch (IllegalArgumentException success) {}
663		}
664
665	<	public void testAwaitUntil_Interrupt() {
666	<	final ReentrantLock lock = new ReentrantLock();
667	<	final Condition c = lock.newCondition();
668	<	Thread t = new Thread(new Runnable() {
669	<	public void run() {
670	<	try {
671	<	lock.lock();
672	<	java.util.Date d = new java.util.Date();
673	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
674	<	lock.unlock();
675	<	fail("should throw");
676	<	}
677	<	catch(InterruptedException success) {
350	<	}
351	<	}
352	<	});
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	>	try {
674	>	lock.hasWaiters(c);
675	>	shouldThrow();
676	>	} catch (IllegalMonitorStateException success) {}
677	>	}
678
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	<	t.start();
690	<	Thread.sleep(SHORT_DELAY_MS);
691	<	t.interrupt();
358	<	t.join(SHORT_DELAY_MS);
359	<	assertFalse(t.isAlive());
360	<	}
361	<	catch (Exception ex) {
362	<	fail("unexpected exception");
363	<	}
689	>	lock2.getWaitQueueLength(c);
690	>	shouldThrow();
691	>	} catch (IllegalArgumentException success) {}
692		}
693
694	<	public void testSignalAll() {
695	<	final ReentrantLock lock = new ReentrantLock();
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	<	Thread t1 = new Thread(new Runnable() {
703	<	public void run() {
704	<	try {
705	<	lock.lock();
706	<	c.await();
707	<	lock.unlock();
708	<	}
709	<	catch(InterruptedException e) {
710	<	fail("unexpected exception");
711	<	}
712	<	}
713	<	});
714	<
715	<	Thread t2 = new Thread(new Runnable() {
716	<	public void run() {
717	<	try {
718	<	lock.lock();
719	<	c.await();
720	<	lock.unlock();
721	<	}
389	<	catch(InterruptedException e) {
390	<	fail("unexpected exception");
391	<	}
392	<	}
393	<	});
702	>	try {
703	>	lock.getWaitQueueLength(c);
704	>	shouldThrow();
705	>	} catch (IllegalMonitorStateException success) {}
706	>	}
707	>
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	>	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);
732	>	lock.getWaitingThreads(c);
733	>	shouldThrow();
734	>	} catch (IllegalMonitorStateException success) {}
735	>	}
736	>
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 condition = lock.newCondition();
896	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
897	>
898	>	Thread t1 = newStartedThread(new CheckedRunnable() {
899	>	public void realRun() {
900	>	// Interrupt before awaitUninterruptibly
901	>	lock.lock();
902	>	pleaseInterrupt.countDown();
903	>	Thread.currentThread().interrupt();
904	>	condition.awaitUninterruptibly();
905	>	assertTrue(Thread.interrupted());
906	>	lock.unlock();
907	>	}});
908	>
909	>	Thread t2 = newStartedThread(new CheckedRunnable() {
910	>	public void realRun() {
911	>	// Interrupt during awaitUninterruptibly
912	>	lock.lock();
913	>	pleaseInterrupt.countDown();
914	>	condition.awaitUninterruptibly();
915	>	assertTrue(Thread.interrupted());
916	>	lock.unlock();
917	>	}});
918	>
919	>	await(pleaseInterrupt);
920	>	t2.interrupt();
921	>	lock.lock();
922	>	lock.unlock();
923	>	assertThreadBlocks(t1, Thread.State.WAITING);
924	>	assertThreadBlocks(t2, Thread.State.WAITING);
925	>
926	>	lock.lock();
927	>	condition.signalAll();
928	>	lock.unlock();
929	>
930	>	awaitTermination(t1);
931	>	awaitTermination(t2);
932	>	}
933	>
934	>	/**
935	>	* await/awaitNanos/awaitUntil is interruptible
936	>	*/
937	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
938	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
939	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
940	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
941	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
942	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
943	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
944	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
945	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
946	>	final PublicReentrantLock lock =
947	>	new PublicReentrantLock(fair);
948	>	final Condition c = lock.newCondition();
949	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
950	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
951	>	public void realRun() throws InterruptedException {
952	>	lock.lock();
953	>	assertLockedByMoi(lock);
954	>	assertHasNoWaiters(lock, c);
955	>	pleaseInterrupt.countDown();
956	>	try {
957	>	await(c, awaitMethod);
958	>	} finally {
959	>	assertLockedByMoi(lock);
960	>	assertHasNoWaiters(lock, c);
961	>	lock.unlock();
962	>	assertFalse(Thread.interrupted());
963	>	}
964	>	}});
965	>
966	>	await(pleaseInterrupt);
967	>	assertHasWaiters(lock, c, t);
968	>	t.interrupt();
969	>	awaitTermination(t);
970	>	assertNotLocked(lock);
971	>	}
972	>
973	>	/**
974	>	* signalAll wakes up all threads
975	>	*/
976	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
977	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
978	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
979	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
980	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
981	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
982	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
983	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
984	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
985	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
986	>	final Condition c = lock.newCondition();
987	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
988	>	class Awaiter extends CheckedRunnable {
989	>	public void realRun() throws InterruptedException {
990	>	lock.lock();
991	>	pleaseSignal.countDown();
992	>	await(c, awaitMethod);
993	>	lock.unlock();
994	>	}
995	>	}
996	>
997	>	Thread t1 = newStartedThread(new Awaiter());
998	>	Thread t2 = newStartedThread(new Awaiter());
999	>
1000	>	await(pleaseSignal);
1001	>	lock.lock();
1002	>	assertHasWaiters(lock, c, t1, t2);
1003	>	c.signalAll();
1004	>	assertHasNoWaiters(lock, c);
1005	>	lock.unlock();
1006	>	awaitTermination(t1);
1007	>	awaitTermination(t2);
1008	>	}
1009	>
1010	>	/**
1011	>	* signal wakes up waiting threads in FIFO order
1012	>	*/
1013	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1014	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1015	>	public void testSignalWakesFifo(boolean fair) {
1016	>	final PublicReentrantLock lock =
1017	>	new PublicReentrantLock(fair);
1018	>	final Condition c = lock.newCondition();
1019	>	final CountDownLatch locked1 = new CountDownLatch(1);
1020	>	final CountDownLatch locked2 = new CountDownLatch(1);
1021	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1022	>	public void realRun() throws InterruptedException {
1023	>	lock.lock();
1024	>	locked1.countDown();
1025	>	c.await();
1026	>	lock.unlock();
1027	>	}});
1028	>
1029	>	await(locked1);
1030	>
1031	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1032	>	public void realRun() throws InterruptedException {
1033	>	lock.lock();
1034	>	locked2.countDown();
1035	>	c.await();
1036	>	lock.unlock();
1037	>	}});
1038	>
1039	>	await(locked2);
1040	>
1041	>	lock.lock();
1042	>	assertHasWaiters(lock, c, t1, t2);
1043	>	assertFalse(lock.hasQueuedThreads());
1044	>	c.signal();
1045	>	assertHasWaiters(lock, c, t2);
1046	>	assertTrue(lock.hasQueuedThread(t1));
1047	>	assertFalse(lock.hasQueuedThread(t2));
1048	>	c.signal();
1049	>	assertHasNoWaiters(lock, c);
1050	>	assertTrue(lock.hasQueuedThread(t1));
1051	>	assertTrue(lock.hasQueuedThread(t2));
1052	>	lock.unlock();
1053	>	awaitTermination(t1);
1054	>	awaitTermination(t2);
1055	>	}
1056	>
1057	>	/**
1058	>	* await after multiple reentrant locking preserves lock count
1059	>	*/
1060	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1061	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1062	>	public void testAwaitLockCount(boolean fair) {
1063	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1064	>	final Condition c = lock.newCondition();
1065	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1066	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1067	>	public void realRun() throws InterruptedException {
1068	>	lock.lock();
1069	>	assertLockedByMoi(lock);
1070	>	assertEquals(1, lock.getHoldCount());
1071	>	pleaseSignal.countDown();
1072	>	c.await();
1073	>	assertLockedByMoi(lock);
1074	>	assertEquals(1, lock.getHoldCount());
1075	>	lock.unlock();
1076	>	}});
1077	>
1078	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1079	>	public void realRun() throws InterruptedException {
1080	>	lock.lock();
1081	>	lock.lock();
1082	>	assertLockedByMoi(lock);
1083	>	assertEquals(2, lock.getHoldCount());
1084	>	pleaseSignal.countDown();
1085	>	c.await();
1086	>	assertLockedByMoi(lock);
1087	>	assertEquals(2, lock.getHoldCount());
1088	>	lock.unlock();
1089	>	lock.unlock();
1090	>	}});
1091	>
1092	>	await(pleaseSignal);
1093	>	lock.lock();
1094	>	assertHasWaiters(lock, c, t1, t2);
1095	>	assertEquals(1, lock.getHoldCount());
1096	>	c.signalAll();
1097	>	assertHasNoWaiters(lock, c);
1098	>	lock.unlock();
1099	>	awaitTermination(t1);
1100	>	awaitTermination(t2);
1101	>	}
1102	>
1103	>	/**
1104	>	* A serialized lock deserializes as unlocked
1105	>	*/
1106	>	public void testSerialization()      { testSerialization(false); }
1107	>	public void testSerialization_fair() { testSerialization(true); }
1108	>	public void testSerialization(boolean fair) {
1109	>	final ReentrantLock lock = new ReentrantLock(fair);
1110	>	lock.lock();
1111	>
1112	>	ReentrantLock clone = serialClone(lock);
1113	>	assertEquals(lock.isFair(), clone.isFair());
1114	>	assertTrue(lock.isLocked());
1115	>	assertFalse(clone.isLocked());
1116	>	assertEquals(1, lock.getHoldCount());
1117	>	assertEquals(0, clone.getHoldCount());
1118	>	clone.lock();
1119	>	clone.lock();
1120	>	assertTrue(clone.isLocked());
1121	>	assertEquals(2, clone.getHoldCount());
1122	>	assertEquals(1, lock.getHoldCount());
1123	>	clone.unlock();
1124	>	clone.unlock();
1125	>	assertTrue(lock.isLocked());
1126	>	assertFalse(clone.isLocked());
1127	>	}
1128	>
1129	>	/**
1130	>	* toString indicates current lock state
1131	>	*/
1132	>	public void testToString()      { testToString(false); }
1133	>	public void testToString_fair() { testToString(true); }
1134	>	public void testToString(boolean fair) {
1135	>	final ReentrantLock lock = new ReentrantLock(fair);
1136	>	assertTrue(lock.toString().contains("Unlocked"));
1137	>	lock.lock();
1138	>	assertTrue(lock.toString().contains("Locked by"));
1139	>	lock.unlock();
1140	>	assertTrue(lock.toString().contains("Unlocked"));
1141	>	}
1142	>
1143	>	/**
1144	>	* Tests scenario for JDK-8187408
1145	>	* AbstractQueuedSynchronizer wait queue corrupted when thread awaits without holding the lock
1146	>	*/
1147	>	public void testBug8187408() throws InterruptedException {
1148	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
1149	>	final AwaitMethod awaitMethod = randomAwaitMethod();
1150	>	final int nThreads = rnd.nextInt(2, 10);
1151	>	final ReentrantLock lock = new ReentrantLock();
1152	>	final Condition cond = lock.newCondition();
1153	>	final CountDownLatch done = new CountDownLatch(nThreads);
1154	>	final ArrayList<Thread> threads = new ArrayList<>();
1155	>
1156	>	Runnable rogue = () -> {
1157	>	while (done.getCount() > 0) {
1158	>	try {
1159	>	// call await without holding lock?!
1160	>	await(cond, awaitMethod);
1161	>	throw new AssertionError("should throw");
1162	>	}
1163	>	catch (IllegalMonitorStateException expected) {}
1164	>	catch (Throwable fail) { threadUnexpectedException(fail); }}};
1165	>	Thread rogueThread = new Thread(rogue, "rogue");
1166	>	threads.add(rogueThread);
1167	>	rogueThread.start();
1168	>
1169	>	Runnable waiter = () -> {
1170		lock.lock();
1171	<	c.signalAll();
1171	>	try {
1172	>	done.countDown();
1173	>	cond.await();
1174	>	} catch (Throwable fail) {
1175	>	threadUnexpectedException(fail);
1176	>	} finally {
1177	>	lock.unlock();
1178	>	}};
1179	>	for (int i = 0; i < nThreads; i++) {
1180	>	Thread thread = new Thread(waiter, "waiter");
1181	>	threads.add(thread);
1182	>	thread.start();
1183	>	}
1184	>
1185	>	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
1186	>	lock.lock();
1187	>	try {
1188	>	assertEquals(nThreads, lock.getWaitQueueLength(cond));
1189	>	} finally {
1190	>	cond.signalAll();
1191		lock.unlock();
402	–	t1.join(SHORT_DELAY_MS);
403	–	t2.join(SHORT_DELAY_MS);
404	–	assertFalse(t1.isAlive());
405	–	assertFalse(t2.isAlive());
1192		}
1193	<	catch (Exception ex) {
1194	<	fail("unexpected exception");
1193	>	for (Thread thread : threads) {
1194	>	thread.join(LONG_DELAY_MS);
1195	>	assertFalse(thread.isAlive());
1196		}
1197		}
411	–
1198		}

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