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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.22 by jsr166, Fri May 27 19:44:42 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 TestCase{
14	<
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		}
18	–
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 subsequent unpark
27	>	*/
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	<	public void testUnpark() {
43	<	Thread t = new Thread(new Runnable(){
44	<	public void run(){
45	<	try{
46	<	LockSupport.park();
47	<	}catch(Exception e){
48	<	fail("unexpected exception");
49	<	}
50	<	}
51	<	});
52	<	t.start();
53	<	try{
54	<	LockSupport.unpark(t);
55	<	t.join();
56	<	}
57	<	catch(Exception e) {
58	<	fail("unexpected exception");
59	<	}
60	<	}
61	<
62	<	public void testParkNanos() {
63	<	Thread t = new Thread(new Runnable(){
64	<	public void run(){
65	<	try{
66	<	LockSupport.parkNanos(1000);
67	<	}catch(Exception e){
68	<	fail("unexpected exception");
69	<	}
70	<	}
71	<	});
72	<	try{
73	<	t.start();
74	<	t.join();
75	<	}
76	<	catch(Exception e) {
77	<	fail("unexpected exception");
78	<	}
42	>	/**
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	<	public void testParkUntil() {
122	<	Thread t = new Thread(new Runnable(){
123	<	public void run(){
124	<	try{
68	<	long d = new Date().getTime() + 100;
69	<	LockSupport.parkUntil(d);
70	<	}catch(Exception e){
71	<	fail("unexpected exception");
72	<	}
73	<	}
74	<	});
75	<	try{
76	<	t.start();
77	<	t.join();
78	<	}
79	<	catch(Exception e) {
80	<	fail("unexpected exception");
81	<	}
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 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	+	* parkUntil times out if not unparked
314	+	*/
315	+	public void testParkUntilTimesOut() throws InterruptedException {
316	+	Thread t = newStartedThread(new CheckedRunnable() {
317	+	public void realRun() {
318	+	for (;;) {
319	+	long d = new Date().getTime() + SHORT_DELAY_MS;
320	+	// beware of rounding
321	+	long timeoutNanos = (SHORT_DELAY_MS - 1) * 1000L * 1000L;
322	+	long t0 = System.nanoTime();
323	+	LockSupport.parkUntil(d);
324	+	// parkUntil may return spuriously
325	+	if (System.nanoTime() - t0 >= timeoutNanos)
326	+	return;
327	+	}
328	+	}});
329	+
330	+	awaitTermination(t, MEDIUM_DELAY_MS);
331	+	}
332	+
333	+	/**
334	+	* getBlocker(null) throws NullPointerException
335	+	*/
336	+	public void testGetBlockerNull() {
337	+	try {
338	+	LockSupport.getBlocker(null);
339	+	shouldThrow();
340	+	} catch (NullPointerException success) {}
341	+	}
342	+
343	+	/**
344	+	* parkUntil(0) returns immediately.
345	+	*
346	+	* Requires hotspot fix for:
347	+	* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
348	+	* which is in jdk7-b118 and 6u25.
349	+	*/
350	+	public void testParkUntil0Returns() throws InterruptedException {
351	+	Thread t = newStartedThread(new CheckedRunnable() {
352	+	public void realRun() {
353	+	LockSupport.parkUntil(0L);
354	+	}});
355	+
356	+	awaitTermination(t);
357	+	}
358		}

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