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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.21 by jsr166, Fri May 6 17:59:36 2011 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 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		*/
9
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{
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	<	*
26	>	* park is released by subsequent unpark
27		*/
28	<	public void testUnpark() {
29	<	Thread t = new Thread(new Runnable() {
30	<	public void run() {
31	<	try {
32	<	LockSupport.park();
33	<	} catch(Exception e){
34	<	threadUnexpectedException();
35	<	}
36	<	}
37	<	});
38	<	t.start();
39	<	try {
36	<	LockSupport.unpark(t);
37	<	t.join();
38	<	}
39	<	catch(Exception e) {
40	<	unexpectedException();
41	<	}
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	>	threadStarted.await();
37	>	delay(SHORT_DELAY_MS);
38	>	LockSupport.unpark(t);
39	>	awaitTermination(t, MEDIUM_DELAY_MS);
40		}
41
42		/**
43	<	*
43	>	* parkUntil is released by subsequent unpark
44	>	*/
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	>	threadStarted.await();
78	>	delay(SHORT_DELAY_MS);
79	>	LockSupport.unpark(t);
80	>	awaitTermination(t, MEDIUM_DELAY_MS);
81	>	}
82	>
83	>	/**
84	>	* park is released by preceding unpark
85	>	*/
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	>	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	>	awaitTermination(t, MEDIUM_DELAY_MS);
218	>	}
219	>
220	>	/**
221	>	* park is released by preceding interrupt
222		*/
223	<	public void testParkNanos() {
224	<	Thread t = new Thread(new Runnable() {
225	<	public void run() {
226	<	try {
227	<	LockSupport.parkNanos(1000);
228	<	} catch(Exception e){
229	<	threadUnexpectedException();
230	<	}
231	<	}
232	<	});
233	<	try {
234	<	t.start();
235	<	t.join();
236	<	}
237	<	catch(Exception e) {
238	<	unexpectedException();
239	<	}
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	+	threadStarted.await();
263	+	t.interrupt();
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 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	+	awaitTermination(t, MEDIUM_DELAY_MS);
310	+	}
311	+
312	+
313	+	/**
314	+	* parkUntil times out if not unparked
315	+	*/
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 testParkUntil() {
352	<	Thread t = new Thread(new Runnable() {
353	<	public void run() {
354	<	try {
355	<	long d = new Date().getTime() + 100;
356	<	LockSupport.parkUntil(d);
357	<	} catch(Exception e){
77	<	threadUnexpectedException();
78	<	}
79	<	}
80	<	});
81	<	try {
82	<	t.start();
83	<	t.join();
84	<	}
85	<	catch(Exception e) {
86	<	unexpectedException();
87	<	}
351	>	public void testParkUntil0Returns() throws InterruptedException {
352	>	Thread t = newStartedThread(new CheckedRunnable() {
353	>	public void realRun() {
354	>	LockSupport.parkUntil(0L);
355	>	}});
356	>
357	>	awaitTermination(t);
358		}
359		}

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