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

Comparing jsr166/src/test/tck/SemaphoreTest.java (file contents):
Revision 1.10 by dl, Fri Jan 2 00:38:47 2004 UTC vs.
Revision 1.22 by jsr166, Tue Dec 1 06:03:49 2009 UTC

#	Line 2 | Line 2
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/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14
15		public class SemaphoreTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
20	<	return new TestSuite(SemaphoreTest.class);
20	>	return new TestSuite(SemaphoreTest.class);
21		}
22
23		/**
#	Line 24 | Line 25 | public class SemaphoreTest extends JSR16
25		*/
26		static class PublicSemaphore extends Semaphore {
27		PublicSemaphore(int p, boolean f) { super(p, f); }
28	<	public Collection<Thread> getQueuedThreads() {
29	<	return super.getQueuedThreads();
28	>	public Collection<Thread> getQueuedThreads() {
29	>	return super.getQueuedThreads();
30		}
31	<	public void reducePermits(int p) {
31	>	public void reducePermits(int p) {
32		super.reducePermits(p);
33		}
34		}
#	Line 35 | Line 36 | public class SemaphoreTest extends JSR16
36		/**
37		* A runnable calling acquire
38		*/
39	<	class InterruptibleLockRunnable implements Runnable {
39	>	class InterruptibleLockRunnable extends CheckedRunnable {
40		final Semaphore lock;
41		InterruptibleLockRunnable(Semaphore l) { lock = l; }
42	<	public void run() {
42	>	public void realRun() {
43		try {
44		lock.acquire();
45	<	} catch(InterruptedException success){}
45	>	}
46	>	catch (InterruptedException ignored) {}
47		}
48		}
49
50
51		/**
52	<	* A runnable calling acquire that expects to be
51	<	* interrupted
52	>	* A runnable calling acquire that expects to be interrupted
53		*/
54	<	class InterruptedLockRunnable implements Runnable {
54	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
55		final Semaphore lock;
56		InterruptedLockRunnable(Semaphore l) { lock = l; }
57	<	public void run() {
58	<	try {
58	<	lock.acquire();
59	<	threadShouldThrow();
60	<	} catch(InterruptedException success){}
57	>	public void realRun() throws InterruptedException {
58	>	lock.acquire();
59		}
60		}
61
#	Line 65 | Line 63 | public class SemaphoreTest extends JSR16
63		* Zero, negative, and positive initial values are allowed in constructor
64		*/
65		public void testConstructor() {
66	<	Semaphore s0 = new Semaphore(0, false);
67	<	assertEquals(0, s0.availablePermits());
68	<	assertFalse(s0.isFair());
69	<	Semaphore s1 = new Semaphore(-1, false);
70	<	assertEquals(-1, s1.availablePermits());
71	<	Semaphore s2 = new Semaphore(-1, false);
72	<	assertEquals(-1, s2.availablePermits());
66	>	for (int permits : new int[] { -1, 0, 1 }) {
67	>	for (boolean fair : new boolean[] { false, true }) {
68	>	Semaphore s = new Semaphore(permits, fair);
69	>	assertEquals(permits, s.availablePermits());
70	>	assertEquals(fair, s.isFair());
71	>	}
72	>	}
73	>	}
74	>
75	>	/**
76	>	* Constructor without fairness argument behaves as nonfair
77	>	*/
78	>	public void testConstructor2() {
79	>	for (int permits : new int[] { -1, 0, 1 }) {
80	>	Semaphore s = new Semaphore(permits);
81	>	assertEquals(permits, s.availablePermits());
82	>	assertFalse(s.isFair());
83	>	}
84		}
85
86		/**
#	Line 89 | Line 98 | public class SemaphoreTest extends JSR16
98		/**
99		* Acquire and release of semaphore succeed if initially available
100		*/
101	<	public void testAcquireReleaseInSameThread() {
101	>	public void testAcquireReleaseInSameThread()
102	>	throws InterruptedException {
103		Semaphore s = new Semaphore(1, false);
104	<	try {
105	<	s.acquire();
106	<	s.release();
107	<	s.acquire();
108	<	s.release();
109	<	s.acquire();
110	<	s.release();
111	<	s.acquire();
112	<	s.release();
113	<	s.acquire();
114	<	s.release();
105	<	assertEquals(1, s.availablePermits());
106	<	} catch( InterruptedException e){
107	<	unexpectedException();
108	<	}
104	>	s.acquire();
105	>	s.release();
106	>	s.acquire();
107	>	s.release();
108	>	s.acquire();
109	>	s.release();
110	>	s.acquire();
111	>	s.release();
112	>	s.acquire();
113	>	s.release();
114	>	assertEquals(1, s.availablePermits());
115		}
116
117		/**
118		* Uninterruptible acquire and release of semaphore succeed if
119		* initially available
120		*/
121	<	public void testAcquireUninterruptiblyReleaseInSameThread() {
121	>	public void testAcquireUninterruptiblyReleaseInSameThread()
122	>	throws InterruptedException {
123		Semaphore s = new Semaphore(1, false);
124	<	try {
125	<	s.acquireUninterruptibly();
126	<	s.release();
127	<	s.acquireUninterruptibly();
128	<	s.release();
129	<	s.acquireUninterruptibly();
130	<	s.release();
131	<	s.acquireUninterruptibly();
132	<	s.release();
133	<	s.acquireUninterruptibly();
134	<	s.release();
128	<	assertEquals(1, s.availablePermits());
129	<	} finally {
130	<	}
124	>	s.acquireUninterruptibly();
125	>	s.release();
126	>	s.acquireUninterruptibly();
127	>	s.release();
128	>	s.acquireUninterruptibly();
129	>	s.release();
130	>	s.acquireUninterruptibly();
131	>	s.release();
132	>	s.acquireUninterruptibly();
133	>	s.release();
134	>	assertEquals(1, s.availablePermits());
135		}
136
137		/**
138		* Timed Acquire and release of semaphore succeed if
139		* initially available
140		*/
141	<	public void testTimedAcquireReleaseInSameThread() {
141	>	public void testTimedAcquireReleaseInSameThread()
142	>	throws InterruptedException {
143		Semaphore s = new Semaphore(1, false);
144	<	try {
145	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
146	<	s.release();
147	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
148	<	s.release();
149	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
150	<	s.release();
151	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
152	<	s.release();
153	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
154	<	s.release();
150	<	assertEquals(1, s.availablePermits());
151	<	} catch( InterruptedException e){
152	<	unexpectedException();
153	<	}
144	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
145	>	s.release();
146	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
147	>	s.release();
148	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
149	>	s.release();
150	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
151	>	s.release();
152	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
153	>	s.release();
154	>	assertEquals(1, s.availablePermits());
155		}
156
157		/**
158		* A release in one thread enables an acquire in another thread
159		*/
160	<	public void testAcquireReleaseInDifferentThreads() {
160	>	public void testAcquireReleaseInDifferentThreads()
161	>	throws InterruptedException {
162		final Semaphore s = new Semaphore(0, false);
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	s.acquire();
167	<	s.release();
168	<	s.release();
169	<	s.acquire();
170	<	} catch(InterruptedException ie){
171	<	threadUnexpectedException();
172	<	}
173	<	}
174	<	});
175	<	try {
176	<	t.start();
177	<	Thread.sleep(SHORT_DELAY_MS);
178	<	s.release();
177	<	s.release();
178	<	s.acquire();
179	<	s.acquire();
180	<	s.release();
181	<	t.join();
182	<	} catch( InterruptedException e){
183	<	unexpectedException();
184	<	}
163	>	Thread t = new Thread(new CheckedRunnable() {
164	>	public void realRun() throws InterruptedException {
165	>	s.acquire();
166	>	s.release();
167	>	s.release();
168	>	s.acquire();
169	>	}});
170	>
171	>	t.start();
172	>	Thread.sleep(SHORT_DELAY_MS);
173	>	s.release();
174	>	s.release();
175	>	s.acquire();
176	>	s.acquire();
177	>	s.release();
178	>	t.join();
179		}
180
181		/**
182		* A release in one thread enables an uninterruptible acquire in another thread
183		*/
184	<	public void testUninterruptibleAcquireReleaseInDifferentThreads() {
184	>	public void testUninterruptibleAcquireReleaseInDifferentThreads()
185	>	throws InterruptedException {
186		final Semaphore s = new Semaphore(0, false);
187	<	Thread t = new Thread(new Runnable() {
188	<	public void run() {
189	<	s.acquireUninterruptibly();
190	<	s.release();
191	<	s.release();
192	<	s.acquireUninterruptibly();
193	<	}
194	<	});
195	<	try {
196	<	t.start();
197	<	Thread.sleep(SHORT_DELAY_MS);
198	<	s.release();
199	<	s.release();
200	<	s.acquireUninterruptibly();
201	<	s.acquireUninterruptibly();
202	<	s.release();
208	<	t.join();
209	<	} catch( InterruptedException e){
210	<	unexpectedException();
211	<	}
187	>	Thread t = new Thread(new CheckedRunnable() {
188	>	public void realRun() throws InterruptedException {
189	>	s.acquireUninterruptibly();
190	>	s.release();
191	>	s.release();
192	>	s.acquireUninterruptibly();
193	>	}});
194	>
195	>	t.start();
196	>	Thread.sleep(SHORT_DELAY_MS);
197	>	s.release();
198	>	s.release();
199	>	s.acquireUninterruptibly();
200	>	s.acquireUninterruptibly();
201	>	s.release();
202	>	t.join();
203		}
204
205
206		/**
207		*  A release in one thread enables a timed acquire in another thread
208		*/
209	<	public void testTimedAcquireReleaseInDifferentThreads() {
209	>	public void testTimedAcquireReleaseInDifferentThreads()
210	>	throws InterruptedException {
211		final Semaphore s = new Semaphore(1, false);
212	<	Thread t = new Thread(new Runnable() {
213	<	public void run() {
214	<	try {
215	<	s.release();
216	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
217	<	s.release();
218	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
219	<
220	<	} catch(InterruptedException ie){
221	<	threadUnexpectedException();
222	<	}
223	<	}
224	<	});
225	<	try {
226	<	t.start();
235	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
236	<	s.release();
237	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
238	<	s.release();
239	<	s.release();
240	<	t.join();
241	<	} catch( InterruptedException e){
242	<	unexpectedException();
243	<	}
212	>	Thread t = new Thread(new CheckedRunnable() {
213	>	public void realRun() throws InterruptedException {
214	>	s.release();
215	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
216	>	s.release();
217	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
218	>	}});
219	>
220	>	t.start();
221	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
222	>	s.release();
223	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
224	>	s.release();
225	>	s.release();
226	>	t.join();
227		}
228
229		/**
230		* A waiting acquire blocks interruptibly
231		*/
232	<	public void testAcquire_InterruptedException() {
233	<	final Semaphore s = new Semaphore(0, false);
234	<	Thread t = new Thread(new Runnable() {
235	<	public void run() {
236	<	try {
237	<	s.acquire();
238	<	threadShouldThrow();
239	<	} catch(InterruptedException success){}
240	<	}
241	<	});
242	<	t.start();
243	<	try {
261	<	Thread.sleep(SHORT_DELAY_MS);
262	<	t.interrupt();
263	<	t.join();
264	<	} catch(InterruptedException e){
265	<	unexpectedException();
266	<	}
232	>	public void testAcquire_InterruptedException()
233	>	throws InterruptedException {
234	>	final Semaphore s = new Semaphore(0, false);
235	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
236	>	public void realRun() throws InterruptedException {
237	>	s.acquire();
238	>	}});
239	>
240	>	t.start();
241	>	Thread.sleep(SHORT_DELAY_MS);
242	>	t.interrupt();
243	>	t.join();
244		}
245	<
245	>
246		/**
247		*  A waiting timed acquire blocks interruptibly
248		*/
249	<	public void testTryAcquire_InterruptedException() {
250	<	final Semaphore s = new Semaphore(0, false);
251	<	Thread t = new Thread(new Runnable() {
252	<	public void run() {
253	<	try {
254	<	s.tryAcquire(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
255	<	threadShouldThrow();
256	<	} catch(InterruptedException success){
257	<	}
258	<	}
259	<	});
260	<	t.start();
284	<	try {
285	<	Thread.sleep(SHORT_DELAY_MS);
286	<	t.interrupt();
287	<	t.join();
288	<	} catch(InterruptedException e){
289	<	unexpectedException();
290	<	}
249	>	public void testTryAcquire_InterruptedException()
250	>	throws InterruptedException {
251	>	final Semaphore s = new Semaphore(0, false);
252	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
253	>	public void realRun() throws InterruptedException {
254	>	s.tryAcquire(MEDIUM_DELAY_MS, MILLISECONDS);
255	>	}});
256	>
257	>	t.start();
258	>	Thread.sleep(SHORT_DELAY_MS);
259	>	t.interrupt();
260	>	t.join();
261		}
262
263		/**
264		* hasQueuedThreads reports whether there are waiting threads
265		*/
266	<	public void testHasQueuedThreads() {
267	<	final Semaphore lock = new Semaphore(1, false);
266	>	public void testHasQueuedThreads() throws InterruptedException {
267	>	final Semaphore lock = new Semaphore(1, false);
268		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
269		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
270	<	try {
271	<	assertFalse(lock.hasQueuedThreads());
272	<	lock.acquireUninterruptibly();
273	<	t1.start();
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	assertTrue(lock.hasQueuedThreads());
276	<	t2.start();
277	<	Thread.sleep(SHORT_DELAY_MS);
278	<	assertTrue(lock.hasQueuedThreads());
279	<	t1.interrupt();
280	<	Thread.sleep(SHORT_DELAY_MS);
281	<	assertTrue(lock.hasQueuedThreads());
282	<	lock.release();
283	<	Thread.sleep(SHORT_DELAY_MS);
284	<	assertFalse(lock.hasQueuedThreads());
285	<	t1.join();
286	<	t2.join();
317	<	} catch(Exception e){
318	<	unexpectedException();
319	<	}
320	<	}
270	>	assertFalse(lock.hasQueuedThreads());
271	>	lock.acquireUninterruptibly();
272	>	t1.start();
273	>	Thread.sleep(SHORT_DELAY_MS);
274	>	assertTrue(lock.hasQueuedThreads());
275	>	t2.start();
276	>	Thread.sleep(SHORT_DELAY_MS);
277	>	assertTrue(lock.hasQueuedThreads());
278	>	t1.interrupt();
279	>	Thread.sleep(SHORT_DELAY_MS);
280	>	assertTrue(lock.hasQueuedThreads());
281	>	lock.release();
282	>	Thread.sleep(SHORT_DELAY_MS);
283	>	assertFalse(lock.hasQueuedThreads());
284	>	t1.join();
285	>	t2.join();
286	>	}
287
288		/**
289		* getQueueLength reports number of waiting threads
290		*/
291	<	public void testGetQueueLength() {
292	<	final Semaphore lock = new Semaphore(1, false);
291	>	public void testGetQueueLength() throws InterruptedException {
292	>	final Semaphore lock = new Semaphore(1, false);
293		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
294		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
295	<	try {
296	<	assertEquals(0, lock.getQueueLength());
297	<	lock.acquireUninterruptibly();
298	<	t1.start();
299	<	Thread.sleep(SHORT_DELAY_MS);
300	<	assertEquals(1, lock.getQueueLength());
301	<	t2.start();
302	<	Thread.sleep(SHORT_DELAY_MS);
303	<	assertEquals(2, lock.getQueueLength());
304	<	t1.interrupt();
305	<	Thread.sleep(SHORT_DELAY_MS);
306	<	assertEquals(1, lock.getQueueLength());
307	<	lock.release();
308	<	Thread.sleep(SHORT_DELAY_MS);
309	<	assertEquals(0, lock.getQueueLength());
310	<	t1.join();
311	<	t2.join();
346	<	} catch(Exception e){
347	<	unexpectedException();
348	<	}
349	<	}
295	>	assertEquals(0, lock.getQueueLength());
296	>	lock.acquireUninterruptibly();
297	>	t1.start();
298	>	Thread.sleep(SHORT_DELAY_MS);
299	>	assertEquals(1, lock.getQueueLength());
300	>	t2.start();
301	>	Thread.sleep(SHORT_DELAY_MS);
302	>	assertEquals(2, lock.getQueueLength());
303	>	t1.interrupt();
304	>	Thread.sleep(SHORT_DELAY_MS);
305	>	assertEquals(1, lock.getQueueLength());
306	>	lock.release();
307	>	Thread.sleep(SHORT_DELAY_MS);
308	>	assertEquals(0, lock.getQueueLength());
309	>	t1.join();
310	>	t2.join();
311	>	}
312
313		/**
314		* getQueuedThreads includes waiting threads
315		*/
316	<	public void testGetQueuedThreads() {
317	<	final PublicSemaphore lock = new PublicSemaphore(1, false);
316	>	public void testGetQueuedThreads() throws InterruptedException {
317	>	final PublicSemaphore lock = new PublicSemaphore(1, false);
318		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
319		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
320	<	try {
321	<	assertTrue(lock.getQueuedThreads().isEmpty());
322	<	lock.acquireUninterruptibly();
323	<	assertTrue(lock.getQueuedThreads().isEmpty());
324	<	t1.start();
325	<	Thread.sleep(SHORT_DELAY_MS);
326	<	assertTrue(lock.getQueuedThreads().contains(t1));
327	<	t2.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
329	<	assertTrue(lock.getQueuedThreads().contains(t1));
330	<	assertTrue(lock.getQueuedThreads().contains(t2));
331	<	t1.interrupt();
332	<	Thread.sleep(SHORT_DELAY_MS);
333	<	assertFalse(lock.getQueuedThreads().contains(t1));
334	<	assertTrue(lock.getQueuedThreads().contains(t2));
335	<	lock.release();
336	<	Thread.sleep(SHORT_DELAY_MS);
337	<	assertTrue(lock.getQueuedThreads().isEmpty());
338	<	t1.join();
339	<	t2.join();
378	<	} catch(Exception e){
379	<	unexpectedException();
380	<	}
381	<	}
320	>	assertTrue(lock.getQueuedThreads().isEmpty());
321	>	lock.acquireUninterruptibly();
322	>	assertTrue(lock.getQueuedThreads().isEmpty());
323	>	t1.start();
324	>	Thread.sleep(SHORT_DELAY_MS);
325	>	assertTrue(lock.getQueuedThreads().contains(t1));
326	>	t2.start();
327	>	Thread.sleep(SHORT_DELAY_MS);
328	>	assertTrue(lock.getQueuedThreads().contains(t1));
329	>	assertTrue(lock.getQueuedThreads().contains(t2));
330	>	t1.interrupt();
331	>	Thread.sleep(SHORT_DELAY_MS);
332	>	assertFalse(lock.getQueuedThreads().contains(t1));
333	>	assertTrue(lock.getQueuedThreads().contains(t2));
334	>	lock.release();
335	>	Thread.sleep(SHORT_DELAY_MS);
336	>	assertTrue(lock.getQueuedThreads().isEmpty());
337	>	t1.join();
338	>	t2.join();
339	>	}
340
341	+	/**
342	+	* drainPermits reports and removes given number of permits
343	+	*/
344	+	public void testDrainPermits() {
345	+	Semaphore s = new Semaphore(0, false);
346	+	assertEquals(0, s.availablePermits());
347	+	assertEquals(0, s.drainPermits());
348	+	s.release(10);
349	+	assertEquals(10, s.availablePermits());
350	+	assertEquals(10, s.drainPermits());
351	+	assertEquals(0, s.availablePermits());
352	+	assertEquals(0, s.drainPermits());
353	+	}
354
355		/**
356		* reducePermits reduces number of permits
#	Line 396 | Line 367 | public class SemaphoreTest extends JSR16
367		/**
368		* a deserialized serialized semaphore has same number of permits
369		*/
370	<	public void testSerialization() {
370	>	public void testSerialization() throws Exception {
371		Semaphore l = new Semaphore(3, false);
372	<	try {
373	<	l.acquire();
374	<	l.release();
375	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
376	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
377	<	out.writeObject(l);
378	<	out.close();
379	<
380	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
381	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
382	<	Semaphore r = (Semaphore) in.readObject();
383	<	assertEquals(3, r.availablePermits());
384	<	assertFalse(r.isFair());
385	<	r.acquire();
415	<	r.release();
416	<	} catch(Exception e){
417	<	unexpectedException();
418	<	}
372	>	l.acquire();
373	>	l.release();
374	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
375	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
376	>	out.writeObject(l);
377	>	out.close();
378	>
379	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
380	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
381	>	Semaphore r = (Semaphore) in.readObject();
382	>	assertEquals(3, r.availablePermits());
383	>	assertFalse(r.isFair());
384	>	r.acquire();
385	>	r.release();
386		}
387
388
#	Line 458 | Line 425 | public class SemaphoreTest extends JSR16
425		/**
426		* Acquire and release of semaphore succeed if initially available
427		*/
428	<	public void testAcquireReleaseInSameThread_fair() {
428	>	public void testAcquireReleaseInSameThread_fair()
429	>	throws InterruptedException {
430		Semaphore s = new Semaphore(1, true);
431	<	try {
432	<	s.acquire();
433	<	s.release();
434	<	s.acquire();
435	<	s.release();
436	<	s.acquire();
437	<	s.release();
438	<	s.acquire();
439	<	s.release();
440	<	s.acquire();
441	<	s.release();
474	<	assertEquals(1, s.availablePermits());
475	<	} catch( InterruptedException e){
476	<	unexpectedException();
477	<	}
431	>	s.acquire();
432	>	s.release();
433	>	s.acquire();
434	>	s.release();
435	>	s.acquire();
436	>	s.release();
437	>	s.acquire();
438	>	s.release();
439	>	s.acquire();
440	>	s.release();
441	>	assertEquals(1, s.availablePermits());
442		}
443
444		/**
445		* Acquire(n) and release(n) of semaphore succeed if initially available
446		*/
447	<	public void testAcquireReleaseNInSameThread_fair() {
447	>	public void testAcquireReleaseNInSameThread_fair()
448	>	throws InterruptedException {
449		Semaphore s = new Semaphore(1, true);
450	<	try {
451	<	s.release(1);
452	<	s.acquire(1);
453	<	s.release(2);
454	<	s.acquire(2);
455	<	s.release(3);
456	<	s.acquire(3);
457	<	s.release(4);
458	<	s.acquire(4);
459	<	s.release(5);
460	<	s.acquire(5);
496	<	assertEquals(1, s.availablePermits());
497	<	} catch( InterruptedException e){
498	<	unexpectedException();
499	<	}
450	>	s.release(1);
451	>	s.acquire(1);
452	>	s.release(2);
453	>	s.acquire(2);
454	>	s.release(3);
455	>	s.acquire(3);
456	>	s.release(4);
457	>	s.acquire(4);
458	>	s.release(5);
459	>	s.acquire(5);
460	>	assertEquals(1, s.availablePermits());
461		}
462
463		/**
#	Line 504 | Line 465 | public class SemaphoreTest extends JSR16
465		*/
466		public void testAcquireUninterruptiblyReleaseNInSameThread_fair() {
467		Semaphore s = new Semaphore(1, true);
468	<	try {
469	<	s.release(1);
470	<	s.acquireUninterruptibly(1);
471	<	s.release(2);
472	<	s.acquireUninterruptibly(2);
473	<	s.release(3);
474	<	s.acquireUninterruptibly(3);
475	<	s.release(4);
476	<	s.acquireUninterruptibly(4);
477	<	s.release(5);
478	<	s.acquireUninterruptibly(5);
518	<	assertEquals(1, s.availablePermits());
519	<	} finally {
520	<	}
468	>	s.release(1);
469	>	s.acquireUninterruptibly(1);
470	>	s.release(2);
471	>	s.acquireUninterruptibly(2);
472	>	s.release(3);
473	>	s.acquireUninterruptibly(3);
474	>	s.release(4);
475	>	s.acquireUninterruptibly(4);
476	>	s.release(5);
477	>	s.acquireUninterruptibly(5);
478	>	assertEquals(1, s.availablePermits());
479		}
480
481		/**
482		* release(n) in one thread enables timed acquire(n) in another thread
483		*/
484	<	public void testTimedAcquireReleaseNInSameThread_fair() {
484	>	public void testTimedAcquireReleaseNInSameThread_fair()
485	>	throws InterruptedException {
486		Semaphore s = new Semaphore(1, true);
487	<	try {
488	<	s.release(1);
489	<	assertTrue(s.tryAcquire(1, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
490	<	s.release(2);
491	<	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
492	<	s.release(3);
493	<	assertTrue(s.tryAcquire(3, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
494	<	s.release(4);
495	<	assertTrue(s.tryAcquire(4, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
496	<	s.release(5);
497	<	assertTrue(s.tryAcquire(5, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
539	<	assertEquals(1, s.availablePermits());
540	<	} catch( InterruptedException e){
541	<	unexpectedException();
542	<	}
487	>	s.release(1);
488	>	assertTrue(s.tryAcquire(1, SHORT_DELAY_MS, MILLISECONDS));
489	>	s.release(2);
490	>	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, MILLISECONDS));
491	>	s.release(3);
492	>	assertTrue(s.tryAcquire(3, SHORT_DELAY_MS, MILLISECONDS));
493	>	s.release(4);
494	>	assertTrue(s.tryAcquire(4, SHORT_DELAY_MS, MILLISECONDS));
495	>	s.release(5);
496	>	assertTrue(s.tryAcquire(5, SHORT_DELAY_MS, MILLISECONDS));
497	>	assertEquals(1, s.availablePermits());
498		}
499
500		/**
501		* release in one thread enables timed acquire in another thread
502		*/
503	<	public void testTimedAcquireReleaseInSameThread_fair() {
503	>	public void testTimedAcquireReleaseInSameThread_fair()
504	>	throws InterruptedException {
505		Semaphore s = new Semaphore(1, true);
506	<	try {
507	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
508	<	s.release();
509	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
510	<	s.release();
511	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
512	<	s.release();
513	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
514	<	s.release();
515	<	assertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
516	<	s.release();
561	<	assertEquals(1, s.availablePermits());
562	<	} catch( InterruptedException e){
563	<	unexpectedException();
564	<	}
506	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
507	>	s.release();
508	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
509	>	s.release();
510	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
511	>	s.release();
512	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
513	>	s.release();
514	>	assertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
515	>	s.release();
516	>	assertEquals(1, s.availablePermits());
517		}
518
519		/**
520		* A release in one thread enables an acquire in another thread
521		*/
522	<	public void testAcquireReleaseInDifferentThreads_fair() {
522	>	public void testAcquireReleaseInDifferentThreads_fair()
523	>	throws InterruptedException {
524		final Semaphore s = new Semaphore(0, true);
525	<	Thread t = new Thread(new Runnable() {
526	<	public void run() {
527	<	try {
528	<	s.acquire();
529	<	s.acquire();
530	<	s.acquire();
531	<	s.acquire();
532	<	} catch(InterruptedException ie){
533	<	threadUnexpectedException();
534	<	}
535	<	}
536	<	});
537	<	try {
538	<	t.start();
539	<	Thread.sleep(SHORT_DELAY_MS);
540	<	s.release();
541	<	s.release();
542	<	s.release();
590	<	s.release();
591	<	s.release();
592	<	s.release();
593	<	t.join();
594	<	assertEquals(2, s.availablePermits());
595	<	} catch( InterruptedException e){
596	<	unexpectedException();
597	<	}
525	>	Thread t = new Thread(new CheckedRunnable() {
526	>	public void realRun() throws InterruptedException {
527	>	s.acquire();
528	>	s.acquire();
529	>	s.acquire();
530	>	s.acquire();
531	>	}});
532	>
533	>	t.start();
534	>	Thread.sleep(SHORT_DELAY_MS);
535	>	s.release();
536	>	s.release();
537	>	s.release();
538	>	s.release();
539	>	s.release();
540	>	s.release();
541	>	t.join();
542	>	assertEquals(2, s.availablePermits());
543		}
544
545		/**
546		* release(n) in one thread enables acquire(n) in another thread
547		*/
548	<	public void testAcquireReleaseNInDifferentThreads_fair() {
548	>	public void testAcquireReleaseNInDifferentThreads_fair()
549	>	throws InterruptedException {
550		final Semaphore s = new Semaphore(0, true);
551	<	Thread t = new Thread(new Runnable() {
552	<	public void run() {
553	<	try {
554	<	s.acquire();
555	<	s.release();
556	<	s.release();
557	<	s.acquire();
558	<	} catch(InterruptedException ie){
559	<	threadUnexpectedException();
560	<	}
561	<	}
562	<	});
563	<	try {
618	<	t.start();
619	<	Thread.sleep(SHORT_DELAY_MS);
620	<	s.release();
621	<	s.release();
622	<	s.acquire();
623	<	s.acquire();
624	<	s.release();
625	<	t.join();
626	<	} catch( InterruptedException e){
627	<	unexpectedException();
628	<	}
551	>	Thread t = new Thread(new CheckedRunnable() {
552	>	public void realRun() throws InterruptedException {
553	>	s.acquire();
554	>	s.release(2);
555	>	s.acquire();
556	>	}});
557	>
558	>	t.start();
559	>	Thread.sleep(SHORT_DELAY_MS);
560	>	s.release(2);
561	>	s.acquire(2);
562	>	s.release(1);
563	>	t.join();
564		}
565
566	+	/**
567	+	* release(n) in one thread enables acquire(n) in another thread
568	+	*/
569	+	public void testAcquireReleaseNInDifferentThreads_fair2()
570	+	throws InterruptedException {
571	+	final Semaphore s = new Semaphore(0, true);
572	+	Thread t = new Thread(new CheckedRunnable() {
573	+	public void realRun() throws InterruptedException {
574	+	s.acquire(2);
575	+	s.acquire(2);
576	+	s.release(4);
577	+	}});
578	+
579	+	t.start();
580	+	Thread.sleep(SHORT_DELAY_MS);
581	+	s.release(6);
582	+	s.acquire(2);
583	+	s.acquire(2);
584	+	s.release(2);
585	+	t.join();
586	+	}
587
588
589		/**
590		* release in one thread enables timed acquire in another thread
591		*/
592	<	public void testTimedAcquireReleaseInDifferentThreads_fair() {
592	>	public void testTimedAcquireReleaseInDifferentThreads_fair()
593	>	throws InterruptedException {
594		final Semaphore s = new Semaphore(1, true);
595	<	Thread t = new Thread(new Runnable() {
596	<	public void run() {
597	<	try {
598	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
599	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
600	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
601	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
602	<	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
603	<
604	<	} catch(InterruptedException ie){
605	<	threadUnexpectedException();
606	<	}
607	<	}
608	<	});
609	<	t.start();
610	<	try {
654	<	s.release();
655	<	s.release();
656	<	s.release();
657	<	s.release();
658	<	s.release();
659	<	t.join();
660	<	} catch( InterruptedException e){
661	<	unexpectedException();
662	<	}
595	>	Thread t = new Thread(new CheckedRunnable() {
596	>	public void realRun() throws InterruptedException {
597	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
598	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
599	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
600	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
601	>	threadAssertTrue(s.tryAcquire(SHORT_DELAY_MS, MILLISECONDS));
602	>	}});
603	>
604	>	t.start();
605	>	s.release();
606	>	s.release();
607	>	s.release();
608	>	s.release();
609	>	s.release();
610	>	t.join();
611		}
612
613		/**
614		* release(n) in one thread enables timed acquire(n) in another thread
615		*/
616	<	public void testTimedAcquireReleaseNInDifferentThreads_fair() {
616	>	public void testTimedAcquireReleaseNInDifferentThreads_fair()
617	>	throws InterruptedException {
618		final Semaphore s = new Semaphore(2, true);
619	<	Thread t = new Thread(new Runnable() {
620	<	public void run() {
621	<	try {
622	<	threadAssertTrue(s.tryAcquire(2, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
623	<	s.release(2);
624	<	threadAssertTrue(s.tryAcquire(2, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
625	<	s.release(2);
626	<	} catch(InterruptedException ie){
627	<	threadUnexpectedException();
628	<	}
629	<	}
630	<	});
631	<	t.start();
632	<	try {
684	<	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
685	<	s.release(2);
686	<	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
687	<	s.release(2);
688	<	t.join();
689	<	} catch( InterruptedException e){
690	<	unexpectedException();
691	<	}
619	>	Thread t = new Thread(new CheckedRunnable() {
620	>	public void realRun() throws InterruptedException {
621	>	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, MILLISECONDS));
622	>	s.release(2);
623	>	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, MILLISECONDS));
624	>	s.release(2);
625	>	}});
626	>
627	>	t.start();
628	>	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, MILLISECONDS));
629	>	s.release(2);
630	>	assertTrue(s.tryAcquire(2, SHORT_DELAY_MS, MILLISECONDS));
631	>	s.release(2);
632	>	t.join();
633		}
634
635		/**
636		* A waiting acquire blocks interruptibly
637		*/
638	<	public void testAcquire_InterruptedException_fair() {
639	<	final Semaphore s = new Semaphore(0, true);
640	<	Thread t = new Thread(new Runnable() {
641	<	public void run() {
642	<	try {
643	<	s.acquire();
644	<	threadShouldThrow();
645	<	} catch(InterruptedException success){}
646	<	}
647	<	});
648	<	t.start();
649	<	try {
709	<	Thread.sleep(SHORT_DELAY_MS);
710	<	t.interrupt();
711	<	t.join();
712	<	} catch(InterruptedException e){
713	<	unexpectedException();
714	<	}
638	>	public void testAcquire_InterruptedException_fair()
639	>	throws InterruptedException {
640	>	final Semaphore s = new Semaphore(0, true);
641	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
642	>	public void realRun() throws InterruptedException {
643	>	s.acquire();
644	>	}});
645	>
646	>	t.start();
647	>	Thread.sleep(SHORT_DELAY_MS);
648	>	t.interrupt();
649	>	t.join();
650		}
651
652		/**
653		* A waiting acquire(n) blocks interruptibly
654		*/
655	<	public void testAcquireN_InterruptedException_fair() {
656	<	final Semaphore s = new Semaphore(2, true);
657	<	Thread t = new Thread(new Runnable() {
658	<	public void run() {
659	<	try {
660	<	s.acquire(3);
661	<	threadShouldThrow();
662	<	} catch(InterruptedException success){}
663	<	}
664	<	});
665	<	t.start();
666	<	try {
732	<	Thread.sleep(SHORT_DELAY_MS);
733	<	t.interrupt();
734	<	t.join();
735	<	} catch(InterruptedException e){
736	<	unexpectedException();
737	<	}
655	>	public void testAcquireN_InterruptedException_fair()
656	>	throws InterruptedException {
657	>	final Semaphore s = new Semaphore(2, true);
658	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
659	>	public void realRun() throws InterruptedException {
660	>	s.acquire(3);
661	>	}});
662	>
663	>	t.start();
664	>	Thread.sleep(SHORT_DELAY_MS);
665	>	t.interrupt();
666	>	t.join();
667		}
668	<
668	>
669		/**
670		*  A waiting tryAcquire blocks interruptibly
671		*/
672	<	public void testTryAcquire_InterruptedException_fair() {
673	<	final Semaphore s = new Semaphore(0, true);
674	<	Thread t = new Thread(new Runnable() {
675	<	public void run() {
676	<	try {
677	<	s.tryAcquire(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
678	<	threadShouldThrow();
679	<	} catch(InterruptedException success){
680	<	}
681	<	}
682	<	});
683	<	t.start();
755	<	try {
756	<	Thread.sleep(SHORT_DELAY_MS);
757	<	t.interrupt();
758	<	t.join();
759	<	} catch(InterruptedException e){
760	<	unexpectedException();
761	<	}
672	>	public void testTryAcquire_InterruptedException_fair()
673	>	throws InterruptedException {
674	>	final Semaphore s = new Semaphore(0, true);
675	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
676	>	public void realRun() throws InterruptedException {
677	>	s.tryAcquire(MEDIUM_DELAY_MS, MILLISECONDS);
678	>	}});
679	>
680	>	t.start();
681	>	Thread.sleep(SHORT_DELAY_MS);
682	>	t.interrupt();
683	>	t.join();
684		}
685
686		/**
687		*  A waiting tryAcquire(n) blocks interruptibly
688		*/
689	<	public void testTryAcquireN_InterruptedException_fair() {
690	<	final Semaphore s = new Semaphore(1, true);
691	<	Thread t = new Thread(new Runnable() {
692	<	public void run() {
693	<	try {
694	<	s.tryAcquire(4, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
695	<	threadShouldThrow();
696	<	} catch(InterruptedException success){
697	<	}
698	<	}
699	<	});
700	<	t.start();
779	<	try {
780	<	Thread.sleep(SHORT_DELAY_MS);
781	<	t.interrupt();
782	<	t.join();
783	<	} catch(InterruptedException e){
784	<	unexpectedException();
785	<	}
689	>	public void testTryAcquireN_InterruptedException_fair()
690	>	throws InterruptedException {
691	>	final Semaphore s = new Semaphore(1, true);
692	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
693	>	public void realRun() throws InterruptedException {
694	>	s.tryAcquire(4, MEDIUM_DELAY_MS, MILLISECONDS);
695	>	}});
696	>
697	>	t.start();
698	>	Thread.sleep(SHORT_DELAY_MS);
699	>	t.interrupt();
700	>	t.join();
701		}
702
703		/**
704		* getQueueLength reports number of waiting threads
705		*/
706	<	public void testGetQueueLength_fair() {
707	<	final Semaphore lock = new Semaphore(1, true);
706	>	public void testGetQueueLength_fair() throws InterruptedException {
707	>	final Semaphore lock = new Semaphore(1, true);
708		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
709		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
710	<	try {
711	<	assertEquals(0, lock.getQueueLength());
712	<	lock.acquireUninterruptibly();
713	<	t1.start();
714	<	Thread.sleep(SHORT_DELAY_MS);
715	<	assertEquals(1, lock.getQueueLength());
716	<	t2.start();
717	<	Thread.sleep(SHORT_DELAY_MS);
718	<	assertEquals(2, lock.getQueueLength());
719	<	t1.interrupt();
720	<	Thread.sleep(SHORT_DELAY_MS);
721	<	assertEquals(1, lock.getQueueLength());
722	<	lock.release();
723	<	Thread.sleep(SHORT_DELAY_MS);
724	<	assertEquals(0, lock.getQueueLength());
725	<	t1.join();
726	<	t2.join();
812	<	} catch(Exception e){
813	<	unexpectedException();
814	<	}
815	<	}
710	>	assertEquals(0, lock.getQueueLength());
711	>	lock.acquireUninterruptibly();
712	>	t1.start();
713	>	Thread.sleep(SHORT_DELAY_MS);
714	>	assertEquals(1, lock.getQueueLength());
715	>	t2.start();
716	>	Thread.sleep(SHORT_DELAY_MS);
717	>	assertEquals(2, lock.getQueueLength());
718	>	t1.interrupt();
719	>	Thread.sleep(SHORT_DELAY_MS);
720	>	assertEquals(1, lock.getQueueLength());
721	>	lock.release();
722	>	Thread.sleep(SHORT_DELAY_MS);
723	>	assertEquals(0, lock.getQueueLength());
724	>	t1.join();
725	>	t2.join();
726	>	}
727
728
729		/**
730		* a deserialized serialized semaphore has same number of permits
731		*/
732	<	public void testSerialization_fair() {
732	>	public void testSerialization_fair() throws Exception {
733		Semaphore l = new Semaphore(3, true);
734
735	<	try {
736	<	l.acquire();
737	<	l.release();
738	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
739	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
740	<	out.writeObject(l);
741	<	out.close();
742	<
743	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
744	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
745	<	Semaphore r = (Semaphore) in.readObject();
746	<	assertEquals(3, r.availablePermits());
747	<	assertTrue(r.isFair());
748	<	r.acquire();
838	<	r.release();
839	<	} catch(Exception e){
840	<	unexpectedException();
841	<	}
735	>	l.acquire();
736	>	l.release();
737	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
738	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
739	>	out.writeObject(l);
740	>	out.close();
741	>
742	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
743	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
744	>	Semaphore r = (Semaphore) in.readObject();
745	>	assertEquals(3, r.availablePermits());
746	>	assertTrue(r.isFair());
747	>	r.acquire();
748	>	r.release();
749		}
750
751	+	/**
752	+	* toString indicates current number of permits
753	+	*/
754	+	public void testToString() {
755	+	Semaphore s = new Semaphore(0);
756	+	String us = s.toString();
757	+	assertTrue(us.indexOf("Permits = 0") >= 0);
758	+	s.release();
759	+	String s1 = s.toString();
760	+	assertTrue(s1.indexOf("Permits = 1") >= 0);
761	+	s.release();
762	+	String s2 = s.toString();
763	+	assertTrue(s2.indexOf("Permits = 2") >= 0);
764	+	}
765
766		}

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