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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.11 by jsr166, Tue Nov 17 12:46:10 2009 UTC vs.
Revision 1.21 by jsr166, Fri May 6 17:59:36 2011 UTC

#	Line 1 | Line 1
1		/*
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
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
#	Line 9 | Line 10
10		import junit.framework.*;
11		import java.util.*;
12		import java.util.concurrent.*;
13	+	import java.util.concurrent.atomic.AtomicBoolean;
14		import java.util.concurrent.locks.*;
15
16		public class LockSupportTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20	+
21		public static Test suite() {
22	<	return new TestSuite(LockSupportTest.class);
22	>	return new TestSuite(LockSupportTest.class);
23		}
24
25		/**
26	<	* park is released by unpark occurring after park
26	>	* park is released by subsequent unpark
27		*/
28	<	public void testPark() throws InterruptedException {
29	<	Thread t = new Thread(new CheckedRunnable() {
30	<	public void realRun() {
28	>	public void testParkBeforeUnpark() throws InterruptedException {
29	>	final CountDownLatch threadStarted = new CountDownLatch(1);
30	>	Thread t = newStartedThread(new CheckedRunnable() {
31	>	public void realRun() {
32	>	threadStarted.countDown();
33		LockSupport.park();
34		}});
35
36	<	t.start();
37	<	Thread.sleep(SHORT_DELAY_MS);
36	>	threadStarted.await();
37	>	delay(SHORT_DELAY_MS);
38		LockSupport.unpark(t);
39	<	t.join();
39	>	awaitTermination(t, MEDIUM_DELAY_MS);
40		}
41
42		/**
43	<	* park is released by unpark occurring before park
43	>	* parkUntil is released by subsequent unpark
44		*/
45	<	public void testPark2() throws InterruptedException {
46	<	Thread t = new Thread(new CheckedRunnable() {
47	<	public void realRun() throws InterruptedException {
48	<	Thread.sleep(SHORT_DELAY_MS);
49	<	LockSupport.park();
45	>	public void testParkUntilBeforeUnpark() throws InterruptedException {
46	>	final CountDownLatch threadStarted = new CountDownLatch(1);
47	>	Thread t = newStartedThread(new CheckedRunnable() {
48	>	public void realRun() {
49	>	long d = new Date().getTime() + LONG_DELAY_MS;
50	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
51	>	long t0 = System.nanoTime();
52	>	threadStarted.countDown();
53	>	LockSupport.parkUntil(d);
54	>	assertTrue(System.nanoTime() - t0 < nanos);
55	>	}});
56	>
57	>	threadStarted.await();
58	>	delay(SHORT_DELAY_MS);
59	>	LockSupport.unpark(t);
60	>	awaitTermination(t, MEDIUM_DELAY_MS);
61	>	}
62	>
63	>	/**
64	>	* parkNanos is released by subsequent unpark
65	>	*/
66	>	public void testParkNanosBeforeUnpark() throws InterruptedException {
67	>	final CountDownLatch threadStarted = new CountDownLatch(1);
68	>	Thread t = newStartedThread(new CheckedRunnable() {
69	>	public void realRun() {
70	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
71	>	long t0 = System.nanoTime();
72	>	threadStarted.countDown();
73	>	LockSupport.parkNanos(nanos);
74	>	assertTrue(System.nanoTime() - t0 < nanos);
75		}});
76
77	<	t.start();
77	>	threadStarted.await();
78	>	delay(SHORT_DELAY_MS);
79		LockSupport.unpark(t);
80	<	t.join();
80	>	awaitTermination(t, MEDIUM_DELAY_MS);
81		}
82
83		/**
84	<	* park is released by interrupt
84	>	* park is released by preceding unpark
85		*/
86	<	public void testPark3() throws InterruptedException {
87	<	Thread t = new Thread(new CheckedRunnable() {
88	<	public void realRun() {
86	>	public void testParkAfterUnpark() throws Exception {
87	>	final CountDownLatch threadStarted = new CountDownLatch(1);
88	>	final AtomicBoolean unparked = new AtomicBoolean(false);
89	>	Thread t = newStartedThread(new CheckedRunnable() {
90	>	public void realRun() throws Exception {
91	>	threadStarted.countDown();
92	>	while (!unparked.get())
93	>	Thread.yield();
94		LockSupport.park();
95		}});
96
97	<	t.start();
98	<	Thread.sleep(SHORT_DELAY_MS);
97	>	threadStarted.await();
98	>	LockSupport.unpark(t);
99	>	unparked.set(true);
100	>	awaitTermination(t, MEDIUM_DELAY_MS);
101	>	}
102	>
103	>	/**
104	>	* parkUntil is released by preceding unpark
105	>	*/
106	>	public void testParkUntilAfterUnpark() throws Exception {
107	>	final CountDownLatch threadStarted = new CountDownLatch(1);
108	>	final AtomicBoolean unparked = new AtomicBoolean(false);
109	>	Thread t = newStartedThread(new CheckedRunnable() {
110	>	public void realRun() throws Exception {
111	>	threadStarted.countDown();
112	>	while (!unparked.get())
113	>	Thread.yield();
114	>	long d = new Date().getTime() + LONG_DELAY_MS;
115	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
116	>	long t0 = System.nanoTime();
117	>	LockSupport.parkUntil(d);
118	>	assertTrue(System.nanoTime() - t0 < nanos);
119	>	}});
120	>
121	>	threadStarted.await();
122	>	LockSupport.unpark(t);
123	>	unparked.set(true);
124	>	awaitTermination(t, MEDIUM_DELAY_MS);
125	>	}
126	>
127	>	/**
128	>	* parkNanos is released by preceding unpark
129	>	*/
130	>	public void testParkNanosAfterUnpark() throws Exception {
131	>	final CountDownLatch threadStarted = new CountDownLatch(1);
132	>	final AtomicBoolean unparked = new AtomicBoolean(false);
133	>	Thread t = newStartedThread(new CheckedRunnable() {
134	>	public void realRun() throws Exception {
135	>	threadStarted.countDown();
136	>	while (!unparked.get())
137	>	Thread.yield();
138	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
139	>	long t0 = System.nanoTime();
140	>	LockSupport.parkNanos(nanos);
141	>	assertTrue(System.nanoTime() - t0 < nanos);
142	>	}});
143	>
144	>	threadStarted.await();
145	>	LockSupport.unpark(t);
146	>	unparked.set(true);
147	>	awaitTermination(t, MEDIUM_DELAY_MS);
148	>	}
149	>
150	>	/**
151	>	* park is released by subsequent interrupt
152	>	*/
153	>	public void testParkBeforeInterrupt() throws InterruptedException {
154	>	final CountDownLatch threadStarted = new CountDownLatch(1);
155	>	Thread t = newStartedThread(new CheckedRunnable() {
156	>	public void realRun() {
157	>	assertFalse(Thread.currentThread().isInterrupted());
158	>	threadStarted.countDown();
159	>	do {
160	>	LockSupport.park();
161	>	// park may return spuriously
162	>	} while (! Thread.currentThread().isInterrupted());
163	>	}});
164	>
165	>	threadStarted.await();
166	>	delay(SHORT_DELAY_MS);
167	>	t.interrupt();
168	>	awaitTermination(t, MEDIUM_DELAY_MS);
169	>	}
170	>
171	>	/**
172	>	* parkUntil is released by subsequent interrupt
173	>	*/
174	>	public void testParkUntilBeforeInterrupt() throws InterruptedException {
175	>	final CountDownLatch threadStarted = new CountDownLatch(1);
176	>	Thread t = newStartedThread(new CheckedRunnable() {
177	>	public void realRun() {
178	>	long d = new Date().getTime() + LONG_DELAY_MS;
179	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
180	>	long t0 = System.nanoTime();
181	>	assertFalse(Thread.currentThread().isInterrupted());
182	>	threadStarted.countDown();
183	>	do {
184	>	LockSupport.parkUntil(d);
185	>	// parkUntil may return spuriously
186	>	} while (! Thread.currentThread().isInterrupted());
187	>	assertTrue(System.nanoTime() - t0 < nanos);
188	>	}});
189	>
190	>	threadStarted.await();
191	>	delay(SHORT_DELAY_MS);
192	>	t.interrupt();
193	>	awaitTermination(t, MEDIUM_DELAY_MS);
194	>	}
195	>
196	>	/**
197	>	* parkNanos is released by subsequent interrupt
198	>	*/
199	>	public void testParkNanosBeforeInterrupt() throws InterruptedException {
200	>	final CountDownLatch threadStarted = new CountDownLatch(1);
201	>	Thread t = newStartedThread(new CheckedRunnable() {
202	>	public void realRun() {
203	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
204	>	long t0 = System.nanoTime();
205	>	assertFalse(Thread.currentThread().isInterrupted());
206	>	threadStarted.countDown();
207	>	do {
208	>	LockSupport.parkNanos(nanos);
209	>	// parkNanos may return spuriously
210	>	} while (! Thread.currentThread().isInterrupted());
211	>	assertTrue(System.nanoTime() - t0 < nanos);
212	>	}});
213	>
214	>	threadStarted.await();
215	>	delay(SHORT_DELAY_MS);
216		t.interrupt();
217	<	t.join();
217	>	awaitTermination(t, MEDIUM_DELAY_MS);
218		}
219
220		/**
221	<	* park returns if interrupted before park
221	>	* park is released by preceding interrupt
222		*/
223	<	public void testPark4() throws InterruptedException {
224	<	final ReentrantLock lock = new ReentrantLock();
225	<	lock.lock();
226	<	Thread t = new Thread(new CheckedRunnable() {
227	<	public void realRun() {
228	<	lock.lock();
223	>	public void testParkAfterInterrupt() throws Exception {
224	>	final CountDownLatch threadStarted = new CountDownLatch(1);
225	>	final AtomicBoolean unparked = new AtomicBoolean(false);
226	>	Thread t = newStartedThread(new CheckedRunnable() {
227	>	public void realRun() throws Exception {
228	>	threadStarted.countDown();
229	>	while (!unparked.get())
230	>	Thread.yield();
231	>	assertTrue(Thread.currentThread().isInterrupted());
232		LockSupport.park();
233	+	assertTrue(Thread.currentThread().isInterrupted());
234	+	}});
235	+
236	+	threadStarted.await();
237	+	t.interrupt();
238	+	unparked.set(true);
239	+	awaitTermination(t, MEDIUM_DELAY_MS);
240	+	}
241	+
242	+	/**
243	+	* parkUntil is released by preceding interrupt
244	+	*/
245	+	public void testParkUntilAfterInterrupt() throws Exception {
246	+	final CountDownLatch threadStarted = new CountDownLatch(1);
247	+	final AtomicBoolean unparked = new AtomicBoolean(false);
248	+	Thread t = newStartedThread(new CheckedRunnable() {
249	+	public void realRun() throws Exception {
250	+	threadStarted.countDown();
251	+	while (!unparked.get())
252	+	Thread.yield();
253	+	long d = new Date().getTime() + LONG_DELAY_MS;
254	+	long nanos = LONG_DELAY_MS * 1000L * 1000L;
255	+	long t0 = System.nanoTime();
256	+	assertTrue(Thread.currentThread().isInterrupted());
257	+	LockSupport.parkUntil(d);
258	+	assertTrue(System.nanoTime() - t0 < nanos);
259	+	assertTrue(Thread.currentThread().isInterrupted());
260		}});
261
262	<	t.start();
262	>	threadStarted.await();
263		t.interrupt();
264	<	lock.unlock();
265	<	t.join();
264	>	unparked.set(true);
265	>	awaitTermination(t, MEDIUM_DELAY_MS);
266	>	}
267	>
268	>	/**
269	>	* parkNanos is released by preceding interrupt
270	>	*/
271	>	public void testParkNanosAfterInterrupt() throws Exception {
272	>	final CountDownLatch threadStarted = new CountDownLatch(1);
273	>	final AtomicBoolean unparked = new AtomicBoolean(false);
274	>	Thread t = newStartedThread(new CheckedRunnable() {
275	>	public void realRun() throws Exception {
276	>	threadStarted.countDown();
277	>	while (!unparked.get())
278	>	Thread.yield();
279	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
280	>	long t0 = System.nanoTime();
281	>	assertTrue(Thread.currentThread().isInterrupted());
282	>	LockSupport.parkNanos(nanos);
283	>	assertTrue(System.nanoTime() - t0 < nanos);
284	>	assertTrue(Thread.currentThread().isInterrupted());
285	>	}});
286	>
287	>	threadStarted.await();
288	>	t.interrupt();
289	>	unparked.set(true);
290	>	awaitTermination(t, MEDIUM_DELAY_MS);
291		}
292
293		/**
294		* parkNanos times out if not unparked
295		*/
296	<	public void testParkNanos() throws InterruptedException {
297	<	Thread t = new Thread(new CheckedRunnable() {
298	<	public void realRun() {
299	<	LockSupport.parkNanos(1000);
296	>	public void testParkNanosTimesOut() throws InterruptedException {
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() {
299	>	for (;;) {
300	>	long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
301	>	long t0 = System.nanoTime();
302	>	LockSupport.parkNanos(timeoutNanos);
303	>	// parkNanos may return spuriously
304	>	if (System.nanoTime() - t0 >= timeoutNanos)
305	>	return;
306	>	}
307		}});
308
309	<	t.start();
95	<	t.join();
309	>	awaitTermination(t, MEDIUM_DELAY_MS);
310		}
311
312
313		/**
314		* parkUntil times out if not unparked
315		*/
316	<	public void testParkUntil() throws InterruptedException {
317	<	Thread t = new Thread(new CheckedRunnable() {
318	<	public void realRun() {
319	<	long d = new Date().getTime() + 100;
320	<	LockSupport.parkUntil(d);
316	>	public void testParkUntilTimesOut() throws InterruptedException {
317	>	Thread t = newStartedThread(new CheckedRunnable() {
318	>	public void realRun() {
319	>	for (;;) {
320	>	long d = new Date().getTime() + SHORT_DELAY_MS;
321	>	// beware of rounding
322	>	long timeoutNanos = (SHORT_DELAY_MS - 1) * 1000L * 1000L;
323	>	long t0 = System.nanoTime();
324	>	LockSupport.parkUntil(d);
325	>	// parkUntil may return spuriously
326	>	if (System.nanoTime() - t0 >= timeoutNanos)
327	>	return;
328	>	}
329	>	}});
330	>
331	>	awaitTermination(t, MEDIUM_DELAY_MS);
332	>	}
333	>
334	>	/**
335	>	* getBlocker(null) throws NullPointerException
336	>	*/
337	>	public void testGetBlockerNull() {
338	>	try {
339	>	LockSupport.getBlocker(null);
340	>	shouldThrow();
341	>	} catch (NullPointerException success) {}
342	>	}
343	>
344	>	/**
345	>	* parkUntil(0) returns immediately.
346	>	*
347	>	* Requires hotspot fix for:
348	>	* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
349	>	* which is in jdk7-b118 and 6u25.
350	>	*/
351	>	public void testParkUntil0Returns() throws InterruptedException {
352	>	Thread t = newStartedThread(new CheckedRunnable() {
353	>	public void realRun() {
354	>	LockSupport.parkUntil(0L);
355		}});
356
357	<	t.start();
110	<	t.join();
357	>	awaitTermination(t);
358		}
359		}

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