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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.66 by jsr166, Mon Jul 17 21:01:30 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	<	import java.util.concurrent.locks.*;
10	<	import java.util.concurrent.*;
11	<	import java.util.*;
12	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	+	import java.util.Arrays;
12	+	import java.util.Collection;
13	+	import java.util.HashSet;
14	+	import java.util.concurrent.CountDownLatch;
15	+	import java.util.concurrent.CyclicBarrier;
16	+	import java.util.concurrent.locks.Condition;
17	+	import java.util.concurrent.locks.ReentrantLock;
18	+
19	+	import junit.framework.AssertionFailedError;
20	+	import junit.framework.Test;
21	+	import junit.framework.TestSuite;
22	+
23	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
24		public class ReentrantLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	main(suite(), args);
27		}
28		public static Test suite() {
29	<	return new TestSuite(ReentrantLockTest.class);
29	>	return new TestSuite(ReentrantLockTest.class);
30		}
31
32		/**
33	<	* A runnable calling lockInterruptibly
33	>	* A checked runnable calling lockInterruptibly
34		*/
35	<	class InterruptibleLockRunnable implements Runnable {
35	>	class InterruptibleLockRunnable extends CheckedRunnable {
36		final ReentrantLock lock;
37	<	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
38	<	public void run() {
39	<	try {
30	<	lock.lockInterruptibly();
31	<	} catch(InterruptedException success){}
37	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
38	>	public void realRun() throws InterruptedException {
39	>	lock.lockInterruptibly();
40		}
41		}
42
35	–
43		/**
44	<	* A runnable calling lockInterruptibly that expects to be
44	>	* A checked runnable calling lockInterruptibly that expects to be
45		* interrupted
46		*/
47	<	class InterruptedLockRunnable implements Runnable {
47	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
48		final ReentrantLock lock;
49	<	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
50	<	public void run() {
51	<	try {
45	<	lock.lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
49	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
50	>	public void realRun() throws InterruptedException {
51	>	lock.lockInterruptibly();
52		}
53		}
54
#	Line 53 | Line 57 | public class ReentrantLockTest extends J
57		*/
58		static class PublicReentrantLock extends ReentrantLock {
59		PublicReentrantLock() { super(); }
60	<	public Collection<Thread> getQueuedThreads() {
61	<	return super.getQueuedThreads();
60	>	PublicReentrantLock(boolean fair) { super(fair); }
61	>	public Thread getOwner() {
62	>	return super.getOwner();
63		}
64	<	public ConditionObject newCondition() {
65	<	return new PublicCondition();
64	>	public Collection<Thread> getQueuedThreads() {
65	>	return super.getQueuedThreads();
66		}
67	<
68	<	class PublicCondition extends ReentrantLock.ConditionObject {
64	<	PublicCondition() { }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
67	>	public Collection<Thread> getWaitingThreads(Condition c) {
68	>	return super.getWaitingThreads(c);
69		}
70	+	}
71
72	+	/**
73	+	* Releases write lock, checking that it had a hold count of 1.
74	+	*/
75	+	void releaseLock(PublicReentrantLock lock) {
76	+	assertLockedByMoi(lock);
77	+	lock.unlock();
78	+	assertFalse(lock.isHeldByCurrentThread());
79	+	assertNotLocked(lock);
80		}
81
82		/**
83	<	* Constructor sets given fairness
83	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
84		*/
85	<	public void testConstructor() {
86	<	ReentrantLock rl = new ReentrantLock();
87	<	assertFalse(rl.isFair());
88	<	ReentrantLock r2 = new ReentrantLock(true);
89	<	assertTrue(r2.isFair());
85	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
86	>	long startTime = System.nanoTime();
87	>	while (!lock.hasQueuedThread(t)) {
88	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
89	>	throw new AssertionFailedError("timed out");
90	>	Thread.yield();
91	>	}
92	>	assertTrue(t.isAlive());
93	>	assertNotSame(t, lock.getOwner());
94		}
95
96		/**
97	<	* locking an unlocked lock succeeds
97	>	* Checks that lock is not locked.
98		*/
99	<	public void testLock() {
100	<	ReentrantLock rl = new ReentrantLock();
101	<	rl.lock();
102	<	assertTrue(rl.isLocked());
103	<	rl.unlock();
99	>	void assertNotLocked(PublicReentrantLock lock) {
100	>	assertFalse(lock.isLocked());
101	>	assertFalse(lock.isHeldByCurrentThread());
102	>	assertNull(lock.getOwner());
103	>	assertEquals(0, lock.getHoldCount());
104		}
105
106		/**
107	<	* locking an unlocked fair lock succeeds
107	>	* Checks that lock is locked by the given thread.
108		*/
109	<	public void testFairLock() {
110	<	ReentrantLock rl = new ReentrantLock(true);
111	<	rl.lock();
112	<	assertTrue(rl.isLocked());
113	<	rl.unlock();
109	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
110	>	assertTrue(lock.isLocked());
111	>	assertSame(t, lock.getOwner());
112	>	assertEquals(t == Thread.currentThread(),
113	>	lock.isHeldByCurrentThread());
114	>	assertEquals(t == Thread.currentThread(),
115	>	lock.getHoldCount() > 0);
116		}
117
118		/**
119	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
119	>	* Checks that lock is locked by the current thread.
120		*/
121	<	public void testUnlock_IllegalMonitorStateException() {
122	<	ReentrantLock rl = new ReentrantLock();
123	<	try {
108	<	rl.unlock();
109	<	shouldThrow();
121	>	void assertLockedByMoi(PublicReentrantLock lock) {
122	>	assertLockedBy(lock, Thread.currentThread());
123	>	}
124
125	<	} catch(IllegalMonitorStateException success){}
125	>	/**
126	>	* Checks that condition c has no waiters.
127	>	*/
128	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
129	>	assertHasWaiters(lock, c, new Thread[] {});
130		}
131
132		/**
133	<	* trylock on an unlocked lock succeeds
133	>	* Checks that condition c has exactly the given waiter threads.
134		*/
135	<	public void testTryLock() {
136	<	ReentrantLock rl = new ReentrantLock();
137	<	assertTrue(rl.tryLock());
138	<	assertTrue(rl.isLocked());
139	<	rl.unlock();
135	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
136	>	Thread... threads) {
137	>	lock.lock();
138	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
139	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
140	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
141	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
142	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
143	>	new HashSet<Thread>(Arrays.asList(threads)));
144	>	lock.unlock();
145		}
146
147	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
148
149		/**
150	<	* getQueueLength reports number of waiting threads
150	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
151		*/
152	<	public void testGetQueueLength() {
153	<	final ReentrantLock lock = new ReentrantLock();
154	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
155	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
156	<	try {
157	<	assertEquals(0, lock.getQueueLength());
158	<	lock.lock();
159	<	t1.start();
160	<	Thread.sleep(SHORT_DELAY_MS);
161	<	assertEquals(1, lock.getQueueLength());
162	<	t2.start();
163	<	Thread.sleep(SHORT_DELAY_MS);
164	<	assertEquals(2, lock.getQueueLength());
165	<	t1.interrupt();
166	<	Thread.sleep(SHORT_DELAY_MS);
167	<	assertEquals(1, lock.getQueueLength());
168	<	lock.unlock();
169	<	Thread.sleep(SHORT_DELAY_MS);
170	<	assertEquals(0, lock.getQueueLength());
171	<	t1.join();
172	<	t2.join();
149	<	} catch(Exception e){
150	<	unexpectedException();
152	>	void await(Condition c, AwaitMethod awaitMethod)
153	>	throws InterruptedException {
154	>	long timeoutMillis = 2 * LONG_DELAY_MS;
155	>	switch (awaitMethod) {
156	>	case await:
157	>	c.await();
158	>	break;
159	>	case awaitTimed:
160	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
161	>	break;
162	>	case awaitNanos:
163	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
164	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
165	>	assertTrue(nanosRemaining > timeoutNanos / 2);
166	>	assertTrue(nanosRemaining <= timeoutNanos);
167	>	break;
168	>	case awaitUntil:
169	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
170	>	break;
171	>	default:
172	>	throw new AssertionError();
173		}
174	<	}
174	>	}
175
176		/**
177	<	* getQueuedThreads includes waiting threads
177	>	* Constructor sets given fairness, and is in unlocked state
178	>	*/
179	>	public void testConstructor() {
180	>	PublicReentrantLock lock;
181	>
182	>	lock = new PublicReentrantLock();
183	>	assertFalse(lock.isFair());
184	>	assertNotLocked(lock);
185	>
186	>	lock = new PublicReentrantLock(true);
187	>	assertTrue(lock.isFair());
188	>	assertNotLocked(lock);
189	>
190	>	lock = new PublicReentrantLock(false);
191	>	assertFalse(lock.isFair());
192	>	assertNotLocked(lock);
193	>	}
194	>
195	>	/**
196	>	* locking an unlocked lock succeeds
197		*/
198	<	public void testGetQueuedThreads() {
199	<	final PublicReentrantLock lock = new PublicReentrantLock();
200	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
201	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
198	>	public void testLock()      { testLock(false); }
199	>	public void testLock_fair() { testLock(true); }
200	>	public void testLock(boolean fair) {
201	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
202	>	lock.lock();
203	>	assertLockedByMoi(lock);
204	>	releaseLock(lock);
205	>	}
206	>
207	>	/**
208	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
209	>	*/
210	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
211	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
212	>	public void testUnlock_IMSE(boolean fair) {
213	>	final ReentrantLock lock = new ReentrantLock(fair);
214		try {
162	–	assertTrue(lock.getQueuedThreads().isEmpty());
163	–	lock.lock();
164	–	assertTrue(lock.getQueuedThreads().isEmpty());
165	–	t1.start();
166	–	Thread.sleep(SHORT_DELAY_MS);
167	–	assertTrue(lock.getQueuedThreads().contains(t1));
168	–	t2.start();
169	–	Thread.sleep(SHORT_DELAY_MS);
170	–	assertTrue(lock.getQueuedThreads().contains(t1));
171	–	assertTrue(lock.getQueuedThreads().contains(t2));
172	–	t1.interrupt();
173	–	Thread.sleep(SHORT_DELAY_MS);
174	–	assertFalse(lock.getQueuedThreads().contains(t1));
175	–	assertTrue(lock.getQueuedThreads().contains(t2));
215		lock.unlock();
216	<	Thread.sleep(SHORT_DELAY_MS);
217	<	assertTrue(lock.getQueuedThreads().isEmpty());
218	<	t1.join();
180	<	t2.join();
181	<	} catch(Exception e){
182	<	unexpectedException();
183	<	}
184	<	}
185	<
216	>	shouldThrow();
217	>	} catch (IllegalMonitorStateException success) {}
218	>	}
219
220		/**
221	<	* timed trylock is interruptible.
221	>	* tryLock on an unlocked lock succeeds
222		*/
223	<	public void testInterruptedException2() {
224	<	final ReentrantLock lock = new ReentrantLock();
225	<	lock.lock();
226	<	Thread t = new Thread(new Runnable() {
227	<	public void run() {
228	<	try {
229	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
230	<	threadShouldThrow();
231	<	} catch(InterruptedException success){}
232	<	}
200	<	});
201	<	try {
202	<	t.start();
203	<	t.interrupt();
204	<	} catch(Exception e){
205	<	unexpectedException();
206	<	}
223	>	public void testTryLock()      { testTryLock(false); }
224	>	public void testTryLock_fair() { testTryLock(true); }
225	>	public void testTryLock(boolean fair) {
226	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
227	>	assertTrue(lock.tryLock());
228	>	assertLockedByMoi(lock);
229	>	assertTrue(lock.tryLock());
230	>	assertLockedByMoi(lock);
231	>	lock.unlock();
232	>	releaseLock(lock);
233		}
234
235	+	/**
236	+	* hasQueuedThreads reports whether there are waiting threads
237	+	*/
238	+	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
239	+	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
240	+	public void testHasQueuedThreads(boolean fair) {
241	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
242	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
243	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
244	+	assertFalse(lock.hasQueuedThreads());
245	+	lock.lock();
246	+	assertFalse(lock.hasQueuedThreads());
247	+	t1.start();
248	+	waitForQueuedThread(lock, t1);
249	+	assertTrue(lock.hasQueuedThreads());
250	+	t2.start();
251	+	waitForQueuedThread(lock, t2);
252	+	assertTrue(lock.hasQueuedThreads());
253	+	t1.interrupt();
254	+	awaitTermination(t1);
255	+	assertTrue(lock.hasQueuedThreads());
256	+	lock.unlock();
257	+	awaitTermination(t2);
258	+	assertFalse(lock.hasQueuedThreads());
259	+	}
260
261		/**
262	<	* Trylock on a locked lock fails
262	>	* getQueueLength reports number of waiting threads
263		*/
264	<	public void testTryLockWhenLocked() {
265	<	final ReentrantLock lock = new ReentrantLock();
266	<	lock.lock();
267	<	Thread t = new Thread(new Runnable() {
268	<	public void run() {
269	<	threadAssertFalse(lock.tryLock());
270	<	}
271	<	});
264	>	public void testGetQueueLength()      { testGetQueueLength(false); }
265	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
266	>	public void testGetQueueLength(boolean fair) {
267	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
268	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
269	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
270	>	assertEquals(0, lock.getQueueLength());
271	>	lock.lock();
272	>	t1.start();
273	>	waitForQueuedThread(lock, t1);
274	>	assertEquals(1, lock.getQueueLength());
275	>	t2.start();
276	>	waitForQueuedThread(lock, t2);
277	>	assertEquals(2, lock.getQueueLength());
278	>	t1.interrupt();
279	>	awaitTermination(t1);
280	>	assertEquals(1, lock.getQueueLength());
281	>	lock.unlock();
282	>	awaitTermination(t2);
283	>	assertEquals(0, lock.getQueueLength());
284	>	}
285	>
286	>	/**
287	>	* hasQueuedThread(null) throws NPE
288	>	*/
289	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
290	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
291	>	public void testHasQueuedThreadNPE(boolean fair) {
292	>	final ReentrantLock lock = new ReentrantLock(fair);
293		try {
294	<	t.start();
295	<	t.join();
296	<	lock.unlock();
297	<	} catch(Exception e){
226	<	unexpectedException();
227	<	}
228	<	}
294	>	lock.hasQueuedThread(null);
295	>	shouldThrow();
296	>	} catch (NullPointerException success) {}
297	>	}
298
299		/**
300	<	* Timed trylock on a locked lock times out
300	>	* hasQueuedThread reports whether a thread is queued
301		*/
302	<	public void testTryLock_Timeout() {
303	<	final ReentrantLock lock = new ReentrantLock();
304	<	lock.lock();
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	try {
308	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
309	<	} catch (Exception ex) {
310	<	threadUnexpectedException();
311	<	}
312	<	}
313	<	});
314	<	try {
315	<	t.start();
316	<	t.join();
317	<	lock.unlock();
318	<	} catch(Exception e){
319	<	unexpectedException();
320	<	}
321	<	}
322	<
302	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
303	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
304	>	public void testHasQueuedThread(boolean fair) {
305	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
306	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
307	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
308	>	assertFalse(lock.hasQueuedThread(t1));
309	>	assertFalse(lock.hasQueuedThread(t2));
310	>	lock.lock();
311	>	t1.start();
312	>	waitForQueuedThread(lock, t1);
313	>	assertTrue(lock.hasQueuedThread(t1));
314	>	assertFalse(lock.hasQueuedThread(t2));
315	>	t2.start();
316	>	waitForQueuedThread(lock, t2);
317	>	assertTrue(lock.hasQueuedThread(t1));
318	>	assertTrue(lock.hasQueuedThread(t2));
319	>	t1.interrupt();
320	>	awaitTermination(t1);
321	>	assertFalse(lock.hasQueuedThread(t1));
322	>	assertTrue(lock.hasQueuedThread(t2));
323	>	lock.unlock();
324	>	awaitTermination(t2);
325	>	assertFalse(lock.hasQueuedThread(t1));
326	>	assertFalse(lock.hasQueuedThread(t2));
327	>	}
328	>
329		/**
330	<	* getHoldCount returns number of recursive holds
330	>	* getQueuedThreads includes waiting threads
331		*/
332	<	public void testGetHoldCount() {
333	<	ReentrantLock lock = new ReentrantLock();
334	<	for(int i = 1; i <= SIZE; i++) {
335	<	lock.lock();
336	<	assertEquals(i,lock.getHoldCount());
337	<	}
338	<	for(int i = SIZE; i > 0; i--) {
339	<	lock.unlock();
340	<	assertEquals(i-1,lock.getHoldCount());
341	<	}
332	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
333	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
334	>	public void testGetQueuedThreads(boolean fair) {
335	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
336	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
337	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
338	>	assertTrue(lock.getQueuedThreads().isEmpty());
339	>	lock.lock();
340	>	assertTrue(lock.getQueuedThreads().isEmpty());
341	>	t1.start();
342	>	waitForQueuedThread(lock, t1);
343	>	assertEquals(1, lock.getQueuedThreads().size());
344	>	assertTrue(lock.getQueuedThreads().contains(t1));
345	>	t2.start();
346	>	waitForQueuedThread(lock, t2);
347	>	assertEquals(2, lock.getQueuedThreads().size());
348	>	assertTrue(lock.getQueuedThreads().contains(t1));
349	>	assertTrue(lock.getQueuedThreads().contains(t2));
350	>	t1.interrupt();
351	>	awaitTermination(t1);
352	>	assertFalse(lock.getQueuedThreads().contains(t1));
353	>	assertTrue(lock.getQueuedThreads().contains(t2));
354	>	assertEquals(1, lock.getQueuedThreads().size());
355	>	lock.unlock();
356	>	awaitTermination(t2);
357	>	assertTrue(lock.getQueuedThreads().isEmpty());
358	>	}
359	>
360	>	/**
361	>	* timed tryLock is interruptible
362	>	*/
363	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
364	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
365	>	public void testTryLock_Interruptible(boolean fair) {
366	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
367	>	lock.lock();
368	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
369	>	public void realRun() throws InterruptedException {
370	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
371	>	}});
372	>
373	>	waitForQueuedThread(lock, t);
374	>	t.interrupt();
375	>	awaitTermination(t);
376	>	releaseLock(lock);
377	>	}
378	>
379	>	/**
380	>	* tryLock on a locked lock fails
381	>	*/
382	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
383	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
384	>	public void testTryLockWhenLocked(boolean fair) {
385	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
386	>	lock.lock();
387	>	Thread t = newStartedThread(new CheckedRunnable() {
388	>	public void realRun() {
389	>	assertFalse(lock.tryLock());
390	>	}});
391	>
392	>	awaitTermination(t);
393	>	releaseLock(lock);
394	>	}
395	>
396	>	/**
397	>	* Timed tryLock on a locked lock times out
398	>	*/
399	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
400	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
401	>	public void testTryLock_Timeout(boolean fair) {
402	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
403	>	final long timeoutMillis = timeoutMillis();
404	>	lock.lock();
405	>	Thread t = newStartedThread(new CheckedRunnable() {
406	>	public void realRun() throws InterruptedException {
407	>	long startTime = System.nanoTime();
408	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
409	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
410	>	}});
411	>
412	>	awaitTermination(t);
413	>	releaseLock(lock);
414		}
415	<
269	<
415	>
416		/**
417	<	* isLocked is true when locked and false when not
417	>	* getHoldCount returns number of recursive holds
418		*/
419	<	public void testIsLocked() {
420	<	final ReentrantLock lock = new ReentrantLock();
421	<	lock.lock();
422	<	assertTrue(lock.isLocked());
423	<	lock.unlock();
424	<	assertFalse(lock.isLocked());
425	<	Thread t = new Thread(new Runnable() {
426	<	public void run() {
427	<	lock.lock();
428	<	try {
429	<	Thread.sleep(SMALL_DELAY_MS);
284	<	}
285	<	catch(Exception e) {
286	<	threadUnexpectedException();
287	<	}
288	<	lock.unlock();
289	<	}
290	<	});
291	<	try {
292	<	t.start();
293	<	Thread.sleep(SHORT_DELAY_MS);
294	<	assertTrue(lock.isLocked());
295	<	t.join();
296	<	assertFalse(lock.isLocked());
297	<	} catch(Exception e){
298	<	unexpectedException();
419	>	public void testGetHoldCount()      { testGetHoldCount(false); }
420	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
421	>	public void testGetHoldCount(boolean fair) {
422	>	final ReentrantLock lock = new ReentrantLock(fair);
423	>	for (int i = 1; i <= SIZE; i++) {
424	>	lock.lock();
425	>	assertEquals(i, lock.getHoldCount());
426	>	}
427	>	for (int i = SIZE; i > 0; i--) {
428	>	lock.unlock();
429	>	assertEquals(i - 1, lock.getHoldCount());
430		}
431		}
432
302	–
433		/**
434	<	* lockInterruptibly is interruptible.
434	>	* isLocked is true when locked and false when not
435		*/
436	<	public void testLockInterruptibly1() {
437	<	final ReentrantLock lock = new ReentrantLock();
438	<	lock.lock();
439	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
436	>	public void testIsLocked()      { testIsLocked(false); }
437	>	public void testIsLocked_fair() { testIsLocked(true); }
438	>	public void testIsLocked(boolean fair) {
439	>	final ReentrantLock lock = new ReentrantLock(fair);
440		try {
441	<	t.start();
442	<	t.interrupt();
441	>	assertFalse(lock.isLocked());
442	>	lock.lock();
443	>	assertTrue(lock.isLocked());
444	>	lock.lock();
445	>	assertTrue(lock.isLocked());
446		lock.unlock();
447	<	t.join();
448	<	} catch(Exception e){
449	<	unexpectedException();
450	<	}
451	<	}
447	>	assertTrue(lock.isLocked());
448	>	lock.unlock();
449	>	assertFalse(lock.isLocked());
450	>	final CyclicBarrier barrier = new CyclicBarrier(2);
451	>	Thread t = newStartedThread(new CheckedRunnable() {
452	>	public void realRun() throws Exception {
453	>	lock.lock();
454	>	assertTrue(lock.isLocked());
455	>	barrier.await();
456	>	barrier.await();
457	>	lock.unlock();
458	>	}});
459	>
460	>	barrier.await();
461	>	assertTrue(lock.isLocked());
462	>	barrier.await();
463	>	awaitTermination(t);
464	>	assertFalse(lock.isLocked());
465	>	} catch (Exception fail) { threadUnexpectedException(fail); }
466	>	}
467
468		/**
469		* lockInterruptibly succeeds when unlocked, else is interruptible
470		*/
471	<	public void testLockInterruptibly2() {
472	<	final ReentrantLock lock = new ReentrantLock();
473	<	try {
474	<	lock.lockInterruptibly();
327	<	} catch(Exception e) {
328	<	unexpectedException();
329	<	}
330	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
471	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
472	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
473	>	public void testLockInterruptibly(boolean fair) {
474	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
475		try {
476	<	t.start();
477	<	t.interrupt();
478	<	assertTrue(lock.isLocked());
479	<	assertTrue(lock.isHeldByCurrentThread());
480	<	t.join();
481	<	} catch(Exception e){
482	<	unexpectedException();
483	<	}
476	>	lock.lockInterruptibly();
477	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
478	>	assertLockedByMoi(lock);
479	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
480	>	waitForQueuedThread(lock, t);
481	>	t.interrupt();
482	>	assertTrue(lock.isLocked());
483	>	assertTrue(lock.isHeldByCurrentThread());
484	>	awaitTermination(t);
485	>	releaseLock(lock);
486		}
487
488		/**
489		* Calling await without holding lock throws IllegalMonitorStateException
490		*/
491	<	public void testAwait_IllegalMonitor() {
492	<	final ReentrantLock lock = new ReentrantLock();
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	<	shouldThrow();
499	<	}
500	<	catch (IllegalMonitorStateException success) {
501	<	}
502	<	catch (Exception ex) {
503	<	unexpectedException();
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		/**
508		* Calling signal without holding lock throws IllegalMonitorStateException
509		*/
510	<	public void testSignal_IllegalMonitor() {
511	<	final ReentrantLock lock = new ReentrantLock();
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		shouldThrow();
518	<	}
369	<	catch (IllegalMonitorStateException success) {
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
518	>	} catch (IllegalMonitorStateException success) {}
519		}
520
521		/**
522		* awaitNanos without a signal times out
523		*/
524	<	public void testAwaitNanos_Timeout() {
525	<	final ReentrantLock lock = new ReentrantLock();
524	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
525	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
526	>	public void testAwaitNanos_Timeout(boolean fair) {
527	>	final ReentrantLock lock = new ReentrantLock(fair);
528		final Condition c = lock.newCondition();
529	+	final long timeoutMillis = timeoutMillis();
530	+	final long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
531	+	lock.lock();
532	+	final long startTime = System.nanoTime();
533		try {
534	<	lock.lock();
535	<	long t = c.awaitNanos(100);
536	<	assertTrue(t <= 0);
537	<	lock.unlock();
538	<	}
388	<	catch (Exception ex) {
389	<	unexpectedException();
390	<	}
534	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
535	>	assertTrue(nanosRemaining <= 0);
536	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
537	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
538	>	lock.unlock();
539		}
540
541		/**
542	<	*  timed await without a signal times out
542	>	* timed await without a signal times out
543		*/
544	<	public void testAwait_Timeout() {
545	<	final ReentrantLock lock = new ReentrantLock();
544	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
545	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
546	>	public void testAwait_Timeout(boolean fair) {
547	>	final ReentrantLock lock = new ReentrantLock(fair);
548		final Condition c = lock.newCondition();
549	<	try {
550	<	lock.lock();
551	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
552	<	lock.unlock();
553	<	}
554	<	catch (Exception ex) {
555	<	unexpectedException();
556	<	}
549	>	final long timeoutMillis = timeoutMillis();
550	>	lock.lock();
551	>	final long startTime = System.nanoTime();
552	>	try {
553	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
554	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
555	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
556	>	lock.unlock();
557		}
558
559		/**
560		* awaitUntil without a signal times out
561		*/
562	<	public void testAwaitUntil_Timeout() {
563	<	final ReentrantLock lock = new ReentrantLock();
562	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
563	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
564	>	public void testAwaitUntil_Timeout(boolean fair) {
565	>	final ReentrantLock lock = new ReentrantLock(fair);
566		final Condition c = lock.newCondition();
567	<	try {
568	<	lock.lock();
569	<	java.util.Date d = new java.util.Date();
570	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
571	<	lock.unlock();
572	<	}
573	<	catch (Exception ex) {
574	<	unexpectedException();
575	<	}
567	>	lock.lock();
568	>	// We shouldn't assume that nanoTime and currentTimeMillis
569	>	// use the same time source, so don't use nanoTime here.
570	>	final java.util.Date delayedDate = delayedDate(timeoutMillis());
571	>	try {
572	>	assertFalse(c.awaitUntil(delayedDate));
573	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
574	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
575	>	lock.unlock();
576		}
577
578		/**
579		* await returns when signalled
580		*/
581	<	public void testAwait() {
582	<	final ReentrantLock lock = new ReentrantLock();
583	<	final ReentrantLock.ConditionObject c = lock.newCondition();
584	<	Thread t = new Thread(new Runnable() {
585	<	public void run() {
586	<	try {
587	<	lock.lock();
588	<	c.await();
589	<	lock.unlock();
590	<	}
591	<	catch(InterruptedException e) {
592	<	threadUnexpectedException();
593	<	}
594	<	}
595	<	});
581	>	public void testAwait()      { testAwait(false); }
582	>	public void testAwait_fair() { testAwait(true); }
583	>	public void testAwait(boolean fair) {
584	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
585	>	final Condition c = lock.newCondition();
586	>	final CountDownLatch locked = new CountDownLatch(1);
587	>	Thread t = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws InterruptedException {
589	>	lock.lock();
590	>	locked.countDown();
591	>	c.await();
592	>	lock.unlock();
593	>	}});
594	>
595	>	await(locked);
596	>	lock.lock();
597	>	assertHasWaiters(lock, c, t);
598	>	c.signal();
599	>	assertHasNoWaiters(lock, c);
600	>	assertTrue(t.isAlive());
601	>	lock.unlock();
602	>	awaitTermination(t);
603	>	}
604
605	+	/**
606	+	* hasWaiters throws NPE if null
607	+	*/
608	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
609	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
610	+	public void testHasWaitersNPE(boolean fair) {
611	+	final ReentrantLock lock = new ReentrantLock(fair);
612		try {
613	<	t.start();
614	<	Thread.sleep(SHORT_DELAY_MS);
615	<	lock.lock();
449	<	c.signal();
450	<	lock.unlock();
451	<	t.join(SHORT_DELAY_MS);
452	<	assertFalse(t.isAlive());
453	<	}
454	<	catch (Exception ex) {
455	<	unexpectedException();
456	<	}
613	>	lock.hasWaiters(null);
614	>	shouldThrow();
615	>	} catch (NullPointerException success) {}
616		}
617
618		/**
619	<	* hasWaiters returns true when a thread is waiting, else false
619	>	* getWaitQueueLength throws NPE if null
620		*/
621	<	public void testHasWaiters() {
622	<	final ReentrantLock lock = new ReentrantLock();
623	<	final ReentrantLock.ConditionObject c = lock.newCondition();
624	<	Thread t = new Thread(new Runnable() {
466	<	public void run() {
467	<	try {
468	<	lock.lock();
469	<	threadAssertFalse(c.hasWaiters());
470	<	threadAssertEquals(0, c.getWaitQueueLength());
471	<	c.await();
472	<	lock.unlock();
473	<	}
474	<	catch(InterruptedException e) {
475	<	threadUnexpectedException();
476	<	}
477	<	}
478	<	});
479	<
621	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
622	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
623	>	public void testGetWaitQueueLengthNPE(boolean fair) {
624	>	final ReentrantLock lock = new ReentrantLock(fair);
625		try {
626	<	t.start();
627	<	Thread.sleep(SHORT_DELAY_MS);
628	<	lock.lock();
484	<	assertTrue(c.hasWaiters());
485	<	assertEquals(1, c.getWaitQueueLength());
486	<	c.signal();
487	<	lock.unlock();
488	<	Thread.sleep(SHORT_DELAY_MS);
489	<	lock.lock();
490	<	assertFalse(c.hasWaiters());
491	<	assertEquals(0, c.getWaitQueueLength());
492	<	lock.unlock();
493	<	t.join(SHORT_DELAY_MS);
494	<	assertFalse(t.isAlive());
495	<	}
496	<	catch (Exception ex) {
497	<	unexpectedException();
498	<	}
626	>	lock.getWaitQueueLength(null);
627	>	shouldThrow();
628	>	} catch (NullPointerException success) {}
629		}
630
631		/**
632	<	* getWaitQueueLength returns number of waiting threads
632	>	* getWaitingThreads throws NPE if null
633		*/
634	<	public void testGetWaitQueueLength() {
635	<	final ReentrantLock lock = new ReentrantLock();
636	<	final ReentrantLock.ConditionObject c = lock.newCondition();
637	<	Thread t1 = new Thread(new Runnable() {
508	<	public void run() {
509	<	try {
510	<	lock.lock();
511	<	threadAssertFalse(c.hasWaiters());
512	<	threadAssertEquals(0, c.getWaitQueueLength());
513	<	c.await();
514	<	lock.unlock();
515	<	}
516	<	catch(InterruptedException e) {
517	<	threadUnexpectedException();
518	<	}
519	<	}
520	<	});
521	<
522	<	Thread t2 = new Thread(new Runnable() {
523	<	public void run() {
524	<	try {
525	<	lock.lock();
526	<	threadAssertTrue(c.hasWaiters());
527	<	threadAssertEquals(1, c.getWaitQueueLength());
528	<	c.await();
529	<	lock.unlock();
530	<	}
531	<	catch(InterruptedException e) {
532	<	threadUnexpectedException();
533	<	}
534	<	}
535	<	});
536	<
634	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
635	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
636	>	public void testGetWaitingThreadsNPE(boolean fair) {
637	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
638		try {
639	<	t1.start();
640	<	Thread.sleep(SHORT_DELAY_MS);
641	<	t2.start();
541	<	Thread.sleep(SHORT_DELAY_MS);
542	<	lock.lock();
543	<	assertTrue(c.hasWaiters());
544	<	assertEquals(2, c.getWaitQueueLength());
545	<	c.signalAll();
546	<	lock.unlock();
547	<	Thread.sleep(SHORT_DELAY_MS);
548	<	lock.lock();
549	<	assertFalse(c.hasWaiters());
550	<	assertEquals(0, c.getWaitQueueLength());
551	<	lock.unlock();
552	<	t1.join(SHORT_DELAY_MS);
553	<	t2.join(SHORT_DELAY_MS);
554	<	assertFalse(t1.isAlive());
555	<	assertFalse(t2.isAlive());
556	<	}
557	<	catch (Exception ex) {
558	<	unexpectedException();
559	<	}
639	>	lock.getWaitingThreads(null);
640	>	shouldThrow();
641	>	} catch (NullPointerException success) {}
642		}
643
644		/**
645	<	* getWaitingThreads returns only and all waiting threads
645	>	* hasWaiters throws IllegalArgumentException if not owned
646		*/
647	<	public void testGetWaitingThreads() {
648	<	final PublicReentrantLock lock = new PublicReentrantLock();
649	<	final PublicReentrantLock.PublicCondition c = (PublicReentrantLock.PublicCondition)lock.newCondition();
650	<	Thread t1 = new Thread(new Runnable() {
651	<	public void run() {
652	<	try {
653	<	lock.lock();
654	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
655	<	c.await();
656	<	lock.unlock();
657	<	}
576	<	catch(InterruptedException e) {
577	<	threadUnexpectedException();
578	<	}
579	<	}
580	<	});
581	<
582	<	Thread t2 = new Thread(new Runnable() {
583	<	public void run() {
584	<	try {
585	<	lock.lock();
586	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
587	<	c.await();
588	<	lock.unlock();
589	<	}
590	<	catch(InterruptedException e) {
591	<	threadUnexpectedException();
592	<	}
593	<	}
594	<	});
647	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
648	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
649	>	public void testHasWaitersIAE(boolean fair) {
650	>	final ReentrantLock lock = new ReentrantLock(fair);
651	>	final Condition c = lock.newCondition();
652	>	final ReentrantLock lock2 = new ReentrantLock(fair);
653	>	try {
654	>	lock2.hasWaiters(c);
655	>	shouldThrow();
656	>	} catch (IllegalArgumentException success) {}
657	>	}
658
659	+	/**
660	+	* hasWaiters throws IllegalMonitorStateException if not locked
661	+	*/
662	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
663	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
664	+	public void testHasWaitersIMSE(boolean fair) {
665	+	final ReentrantLock lock = new ReentrantLock(fair);
666	+	final Condition c = lock.newCondition();
667		try {
668	<	lock.lock();
669	<	assertTrue(c.getWaitingThreads().isEmpty());
670	<	lock.unlock();
600	<	t1.start();
601	<	Thread.sleep(SHORT_DELAY_MS);
602	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	lock.lock();
605	<	assertTrue(c.hasWaiters());
606	<	assertTrue(c.getWaitingThreads().contains(t1));
607	<	assertTrue(c.getWaitingThreads().contains(t2));
608	<	c.signalAll();
609	<	lock.unlock();
610	<	Thread.sleep(SHORT_DELAY_MS);
611	<	lock.lock();
612	<	assertFalse(c.hasWaiters());
613	<	assertTrue(c.getWaitingThreads().isEmpty());
614	<	lock.unlock();
615	<	t1.join(SHORT_DELAY_MS);
616	<	t2.join(SHORT_DELAY_MS);
617	<	assertFalse(t1.isAlive());
618	<	assertFalse(t2.isAlive());
619	<	}
620	<	catch (Exception ex) {
621	<	unexpectedException();
622	<	}
668	>	lock.hasWaiters(c);
669	>	shouldThrow();
670	>	} catch (IllegalMonitorStateException success) {}
671		}
672
673		/**
674	<	* awaitUninterruptibly doesn't abort on interrupt
674	>	* getWaitQueueLength throws IllegalArgumentException if not owned
675		*/
676	<	public void testAwaitUninterruptibly() {
677	<	final ReentrantLock lock = new ReentrantLock();
676	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
677	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
678	>	public void testGetWaitQueueLengthIAE(boolean fair) {
679	>	final ReentrantLock lock = new ReentrantLock(fair);
680		final Condition c = lock.newCondition();
681	<	Thread t = new Thread(new Runnable() {
682	<	public void run() {
683	<	lock.lock();
684	<	c.awaitUninterruptibly();
685	<	lock.unlock();
686	<	}
637	<	});
681	>	final ReentrantLock lock2 = new ReentrantLock(fair);
682	>	try {
683	>	lock2.getWaitQueueLength(c);
684	>	shouldThrow();
685	>	} catch (IllegalArgumentException success) {}
686	>	}
687
688	+	/**
689	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
690	+	*/
691	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
692	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
693	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
694	+	final ReentrantLock lock = new ReentrantLock(fair);
695	+	final Condition c = lock.newCondition();
696		try {
697	<	t.start();
698	<	Thread.sleep(SHORT_DELAY_MS);
699	<	t.interrupt();
643	<	lock.lock();
644	<	c.signal();
645	<	lock.unlock();
646	<	assert(t.isInterrupted());
647	<	t.join(SHORT_DELAY_MS);
648	<	assertFalse(t.isAlive());
649	<	}
650	<	catch (Exception ex) {
651	<	unexpectedException();
652	<	}
697	>	lock.getWaitQueueLength(c);
698	>	shouldThrow();
699	>	} catch (IllegalMonitorStateException success) {}
700		}
701
702		/**
703	<	* await is interruptible
703	>	* getWaitingThreads throws IllegalArgumentException if not owned
704		*/
705	<	public void testAwait_Interrupt() {
706	<	final ReentrantLock lock = new ReentrantLock();
705	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
706	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
707	>	public void testGetWaitingThreadsIAE(boolean fair) {
708	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
709		final Condition c = lock.newCondition();
710	<	Thread t = new Thread(new Runnable() {
711	<	public void run() {
712	<	try {
713	<	lock.lock();
714	<	c.await();
715	<	lock.unlock();
667	<	threadShouldThrow();
668	<	}
669	<	catch(InterruptedException success) {
670	<	}
671	<	}
672	<	});
710	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
711	>	try {
712	>	lock2.getWaitingThreads(c);
713	>	shouldThrow();
714	>	} catch (IllegalArgumentException success) {}
715	>	}
716
717	+	/**
718	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
719	+	*/
720	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
721	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
722	+	public void testGetWaitingThreadsIMSE(boolean fair) {
723	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
724	+	final Condition c = lock.newCondition();
725		try {
726	<	t.start();
727	<	Thread.sleep(SHORT_DELAY_MS);
728	<	t.interrupt();
678	<	t.join(SHORT_DELAY_MS);
679	<	assertFalse(t.isAlive());
680	<	}
681	<	catch (Exception ex) {
682	<	unexpectedException();
683	<	}
726	>	lock.getWaitingThreads(c);
727	>	shouldThrow();
728	>	} catch (IllegalMonitorStateException success) {}
729		}
730
731		/**
732	<	* awaitNanos is interruptible
732	>	* hasWaiters returns true when a thread is waiting, else false
733		*/
734	<	public void testAwaitNanos_Interrupt() {
735	<	final ReentrantLock lock = new ReentrantLock();
734	>	public void testHasWaiters()      { testHasWaiters(false); }
735	>	public void testHasWaiters_fair() { testHasWaiters(true); }
736	>	public void testHasWaiters(boolean fair) {
737	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
738		final Condition c = lock.newCondition();
739	<	Thread t = new Thread(new Runnable() {
740	<	public void run() {
741	<	try {
742	<	lock.lock();
743	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
744	<	lock.unlock();
745	<	threadShouldThrow();
746	<	}
747	<	catch(InterruptedException success) {
748	<	}
749	<	}
750	<	});
739	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
740	>	Thread t = newStartedThread(new CheckedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.lock();
743	>	assertHasNoWaiters(lock, c);
744	>	assertFalse(lock.hasWaiters(c));
745	>	pleaseSignal.countDown();
746	>	c.await();
747	>	assertHasNoWaiters(lock, c);
748	>	assertFalse(lock.hasWaiters(c));
749	>	lock.unlock();
750	>	}});
751	>
752	>	await(pleaseSignal);
753	>	lock.lock();
754	>	assertHasWaiters(lock, c, t);
755	>	assertTrue(lock.hasWaiters(c));
756	>	c.signal();
757	>	assertHasNoWaiters(lock, c);
758	>	assertFalse(lock.hasWaiters(c));
759	>	lock.unlock();
760	>	awaitTermination(t);
761	>	assertHasNoWaiters(lock, c);
762	>	}
763
764	<	try {
765	<	t.start();
766	<	Thread.sleep(SHORT_DELAY_MS);
767	<	t.interrupt();
768	<	t.join(SHORT_DELAY_MS);
769	<	assertFalse(t.isAlive());
770	<	}
771	<	catch (Exception ex) {
772	<	unexpectedException();
773	<	}
764	>	/**
765	>	* getWaitQueueLength returns number of waiting threads
766	>	*/
767	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
768	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
769	>	public void testGetWaitQueueLength(boolean fair) {
770	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
771	>	final Condition c = lock.newCondition();
772	>	final CountDownLatch locked1 = new CountDownLatch(1);
773	>	final CountDownLatch locked2 = new CountDownLatch(1);
774	>	Thread t1 = new Thread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	lock.lock();
777	>	assertFalse(lock.hasWaiters(c));
778	>	assertEquals(0, lock.getWaitQueueLength(c));
779	>	locked1.countDown();
780	>	c.await();
781	>	lock.unlock();
782	>	}});
783	>
784	>	Thread t2 = new Thread(new CheckedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	lock.lock();
787	>	assertTrue(lock.hasWaiters(c));
788	>	assertEquals(1, lock.getWaitQueueLength(c));
789	>	locked2.countDown();
790	>	c.await();
791	>	lock.unlock();
792	>	}});
793	>
794	>	lock.lock();
795	>	assertEquals(0, lock.getWaitQueueLength(c));
796	>	lock.unlock();
797	>
798	>	t1.start();
799	>	await(locked1);
800	>
801	>	lock.lock();
802	>	assertHasWaiters(lock, c, t1);
803	>	assertEquals(1, lock.getWaitQueueLength(c));
804	>	lock.unlock();
805	>
806	>	t2.start();
807	>	await(locked2);
808	>
809	>	lock.lock();
810	>	assertHasWaiters(lock, c, t1, t2);
811	>	assertEquals(2, lock.getWaitQueueLength(c));
812	>	c.signalAll();
813	>	assertHasNoWaiters(lock, c);
814	>	lock.unlock();
815	>
816	>	awaitTermination(t1);
817	>	awaitTermination(t2);
818	>
819	>	assertHasNoWaiters(lock, c);
820		}
821
822		/**
823	<	* awaitUntil is interruptible
823	>	* getWaitingThreads returns only and all waiting threads
824		*/
825	<	public void testAwaitUntil_Interrupt() {
826	<	final ReentrantLock lock = new ReentrantLock();
825	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
826	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
827	>	public void testGetWaitingThreads(boolean fair) {
828	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
829		final Condition c = lock.newCondition();
830	<	Thread t = new Thread(new Runnable() {
831	<	public void run() {
832	<	try {
833	<	lock.lock();
834	<	java.util.Date d = new java.util.Date();
835	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
836	<	lock.unlock();
837	<	threadShouldThrow();
838	<	}
839	<	catch(InterruptedException success) {
840	<	}
841	<	}
842	<	});
843	<
844	<	try {
845	<	t.start();
846	<	Thread.sleep(SHORT_DELAY_MS);
847	<	t.interrupt();
848	<	t.join(SHORT_DELAY_MS);
849	<	assertFalse(t.isAlive());
850	<	}
851	<	catch (Exception ex) {
852	<	unexpectedException();
853	<	}
830	>	final CountDownLatch locked1 = new CountDownLatch(1);
831	>	final CountDownLatch locked2 = new CountDownLatch(1);
832	>	Thread t1 = new Thread(new CheckedRunnable() {
833	>	public void realRun() throws InterruptedException {
834	>	lock.lock();
835	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
836	>	locked1.countDown();
837	>	c.await();
838	>	lock.unlock();
839	>	}});
840	>
841	>	Thread t2 = new Thread(new CheckedRunnable() {
842	>	public void realRun() throws InterruptedException {
843	>	lock.lock();
844	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
845	>	locked2.countDown();
846	>	c.await();
847	>	lock.unlock();
848	>	}});
849	>
850	>	lock.lock();
851	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
852	>	lock.unlock();
853	>
854	>	t1.start();
855	>	await(locked1);
856	>
857	>	lock.lock();
858	>	assertHasWaiters(lock, c, t1);
859	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
860	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
861	>	assertEquals(1, lock.getWaitingThreads(c).size());
862	>	lock.unlock();
863	>
864	>	t2.start();
865	>	await(locked2);
866	>
867	>	lock.lock();
868	>	assertHasWaiters(lock, c, t1, t2);
869	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
870	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
871	>	assertEquals(2, lock.getWaitingThreads(c).size());
872	>	c.signalAll();
873	>	assertHasNoWaiters(lock, c);
874	>	lock.unlock();
875	>
876	>	awaitTermination(t1);
877	>	awaitTermination(t2);
878	>
879	>	assertHasNoWaiters(lock, c);
880	>	}
881	>
882	>	/**
883	>	* awaitUninterruptibly is uninterruptible
884	>	*/
885	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
886	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
887	>	public void testAwaitUninterruptibly(boolean fair) {
888	>	final ReentrantLock lock = new ReentrantLock(fair);
889	>	final Condition condition = lock.newCondition();
890	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
891	>
892	>	Thread t1 = newStartedThread(new CheckedRunnable() {
893	>	public void realRun() {
894	>	// Interrupt before awaitUninterruptibly
895	>	lock.lock();
896	>	pleaseInterrupt.countDown();
897	>	Thread.currentThread().interrupt();
898	>	condition.awaitUninterruptibly();
899	>	assertTrue(Thread.interrupted());
900	>	lock.unlock();
901	>	}});
902	>
903	>	Thread t2 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() {
905	>	// Interrupt during awaitUninterruptibly
906	>	lock.lock();
907	>	pleaseInterrupt.countDown();
908	>	condition.awaitUninterruptibly();
909	>	assertTrue(Thread.interrupted());
910	>	lock.unlock();
911	>	}});
912	>
913	>	await(pleaseInterrupt);
914	>	t2.interrupt();
915	>	lock.lock();
916	>	lock.unlock();
917	>	assertThreadBlocks(t1, Thread.State.WAITING);
918	>	assertThreadBlocks(t2, Thread.State.WAITING);
919	>
920	>	lock.lock();
921	>	condition.signalAll();
922	>	lock.unlock();
923	>
924	>	awaitTermination(t1);
925	>	awaitTermination(t2);
926	>	}
927	>
928	>	/**
929	>	* await/awaitNanos/awaitUntil is interruptible
930	>	*/
931	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
932	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
933	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
934	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
935	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
936	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
937	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
938	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
939	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
940	>	final PublicReentrantLock lock =
941	>	new PublicReentrantLock(fair);
942	>	final Condition c = lock.newCondition();
943	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
944	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
945	>	public void realRun() throws InterruptedException {
946	>	lock.lock();
947	>	assertLockedByMoi(lock);
948	>	assertHasNoWaiters(lock, c);
949	>	pleaseInterrupt.countDown();
950	>	try {
951	>	await(c, awaitMethod);
952	>	} finally {
953	>	assertLockedByMoi(lock);
954	>	assertHasNoWaiters(lock, c);
955	>	lock.unlock();
956	>	assertFalse(Thread.interrupted());
957	>	}
958	>	}});
959	>
960	>	await(pleaseInterrupt);
961	>	assertHasWaiters(lock, c, t);
962	>	t.interrupt();
963	>	awaitTermination(t);
964	>	assertNotLocked(lock);
965		}
966
967		/**
968		* signalAll wakes up all threads
969		*/
970	<	public void testSignalAll() {
971	<	final ReentrantLock lock = new ReentrantLock();
970	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
971	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
972	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
973	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
974	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
975	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
976	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
977	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
978	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
979	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
980		final Condition c = lock.newCondition();
981	<	Thread t1 = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.lock();
985	<	c.await();
986	<	lock.unlock();
987	<	}
988	<	catch(InterruptedException e) {
763	<	threadUnexpectedException();
764	<	}
765	<	}
766	<	});
767	<
768	<	Thread t2 = new Thread(new Runnable() {
769	<	public void run() {
770	<	try {
771	<	lock.lock();
772	<	c.await();
773	<	lock.unlock();
774	<	}
775	<	catch(InterruptedException e) {
776	<	threadUnexpectedException();
777	<	}
778	<	}
779	<	});
780	<
781	<	try {
782	<	t1.start();
783	<	t2.start();
784	<	Thread.sleep(SHORT_DELAY_MS);
785	<	lock.lock();
786	<	c.signalAll();
787	<	lock.unlock();
788	<	t1.join(SHORT_DELAY_MS);
789	<	t2.join(SHORT_DELAY_MS);
790	<	assertFalse(t1.isAlive());
791	<	assertFalse(t2.isAlive());
792	<	}
793	<	catch (Exception ex) {
794	<	unexpectedException();
981	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
982	>	class Awaiter extends CheckedRunnable {
983	>	public void realRun() throws InterruptedException {
984	>	lock.lock();
985	>	pleaseSignal.countDown();
986	>	await(c, awaitMethod);
987	>	lock.unlock();
988	>	}
989		}
990	+
991	+	Thread t1 = newStartedThread(new Awaiter());
992	+	Thread t2 = newStartedThread(new Awaiter());
993	+
994	+	await(pleaseSignal);
995	+	lock.lock();
996	+	assertHasWaiters(lock, c, t1, t2);
997	+	c.signalAll();
998	+	assertHasNoWaiters(lock, c);
999	+	lock.unlock();
1000	+	awaitTermination(t1);
1001	+	awaitTermination(t2);
1002	+	}
1003	+
1004	+	/**
1005	+	* signal wakes up waiting threads in FIFO order
1006	+	*/
1007	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1008	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1009	+	public void testSignalWakesFifo(boolean fair) {
1010	+	final PublicReentrantLock lock =
1011	+	new PublicReentrantLock(fair);
1012	+	final Condition c = lock.newCondition();
1013	+	final CountDownLatch locked1 = new CountDownLatch(1);
1014	+	final CountDownLatch locked2 = new CountDownLatch(1);
1015	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1016	+	public void realRun() throws InterruptedException {
1017	+	lock.lock();
1018	+	locked1.countDown();
1019	+	c.await();
1020	+	lock.unlock();
1021	+	}});
1022	+
1023	+	await(locked1);
1024	+
1025	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1026	+	public void realRun() throws InterruptedException {
1027	+	lock.lock();
1028	+	locked2.countDown();
1029	+	c.await();
1030	+	lock.unlock();
1031	+	}});
1032	+
1033	+	await(locked2);
1034	+
1035	+	lock.lock();
1036	+	assertHasWaiters(lock, c, t1, t2);
1037	+	assertFalse(lock.hasQueuedThreads());
1038	+	c.signal();
1039	+	assertHasWaiters(lock, c, t2);
1040	+	assertTrue(lock.hasQueuedThread(t1));
1041	+	assertFalse(lock.hasQueuedThread(t2));
1042	+	c.signal();
1043	+	assertHasNoWaiters(lock, c);
1044	+	assertTrue(lock.hasQueuedThread(t1));
1045	+	assertTrue(lock.hasQueuedThread(t2));
1046	+	lock.unlock();
1047	+	awaitTermination(t1);
1048	+	awaitTermination(t2);
1049	+	}
1050	+
1051	+	/**
1052	+	* await after multiple reentrant locking preserves lock count
1053	+	*/
1054	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1055	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1056	+	public void testAwaitLockCount(boolean fair) {
1057	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1058	+	final Condition c = lock.newCondition();
1059	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1060	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1061	+	public void realRun() throws InterruptedException {
1062	+	lock.lock();
1063	+	assertLockedByMoi(lock);
1064	+	assertEquals(1, lock.getHoldCount());
1065	+	pleaseSignal.countDown();
1066	+	c.await();
1067	+	assertLockedByMoi(lock);
1068	+	assertEquals(1, lock.getHoldCount());
1069	+	lock.unlock();
1070	+	}});
1071	+
1072	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1073	+	public void realRun() throws InterruptedException {
1074	+	lock.lock();
1075	+	lock.lock();
1076	+	assertLockedByMoi(lock);
1077	+	assertEquals(2, lock.getHoldCount());
1078	+	pleaseSignal.countDown();
1079	+	c.await();
1080	+	assertLockedByMoi(lock);
1081	+	assertEquals(2, lock.getHoldCount());
1082	+	lock.unlock();
1083	+	lock.unlock();
1084	+	}});
1085	+
1086	+	await(pleaseSignal);
1087	+	lock.lock();
1088	+	assertHasWaiters(lock, c, t1, t2);
1089	+	assertEquals(1, lock.getHoldCount());
1090	+	c.signalAll();
1091	+	assertHasNoWaiters(lock, c);
1092	+	lock.unlock();
1093	+	awaitTermination(t1);
1094	+	awaitTermination(t2);
1095		}
1096
1097		/**
1098		* A serialized lock deserializes as unlocked
1099		*/
1100	<	public void testSerialization() {
1101	<	ReentrantLock l = new ReentrantLock();
1102	<	l.lock();
1103	<	l.unlock();
1104	<
1105	<	try {
1106	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1107	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1108	<	out.writeObject(l);
1109	<	out.close();
1110	<
1111	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1112	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1113	<	ReentrantLock r = (ReentrantLock) in.readObject();
1114	<	r.lock();
1115	<	r.unlock();
1116	<	} catch(Exception e){
1117	<	e.printStackTrace();
1118	<	unexpectedException();
1119	<	}
1100	>	public void testSerialization()      { testSerialization(false); }
1101	>	public void testSerialization_fair() { testSerialization(true); }
1102	>	public void testSerialization(boolean fair) {
1103	>	final ReentrantLock lock = new ReentrantLock(fair);
1104	>	lock.lock();
1105	>
1106	>	ReentrantLock clone = serialClone(lock);
1107	>	assertEquals(lock.isFair(), clone.isFair());
1108	>	assertTrue(lock.isLocked());
1109	>	assertFalse(clone.isLocked());
1110	>	assertEquals(1, lock.getHoldCount());
1111	>	assertEquals(0, clone.getHoldCount());
1112	>	clone.lock();
1113	>	clone.lock();
1114	>	assertTrue(clone.isLocked());
1115	>	assertEquals(2, clone.getHoldCount());
1116	>	assertEquals(1, lock.getHoldCount());
1117	>	clone.unlock();
1118	>	clone.unlock();
1119	>	assertTrue(lock.isLocked());
1120	>	assertFalse(clone.isLocked());
1121		}
1122
1123	+	/**
1124	+	* toString indicates current lock state
1125	+	*/
1126	+	public void testToString()      { testToString(false); }
1127	+	public void testToString_fair() { testToString(true); }
1128	+	public void testToString(boolean fair) {
1129	+	final ReentrantLock lock = new ReentrantLock(fair);
1130	+	assertTrue(lock.toString().contains("Unlocked"));
1131	+	lock.lock();
1132	+	assertTrue(lock.toString().contains("Locked by"));
1133	+	lock.unlock();
1134	+	assertTrue(lock.toString().contains("Unlocked"));
1135	+	}
1136		}

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