1 |
dl |
1.1 |
/* |
2 |
jsr166 |
1.15 |
* Written by Doug Lea and Martin Buchholz with assistance from |
3 |
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* members of JCP JSR-166 Expert Group and released to the public |
4 |
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* domain, as explained at |
5 |
jsr166 |
1.18 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
jsr166 |
1.8 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
7 |
|
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* Pat Fisher, Mike Judd. |
8 |
dl |
1.1 |
*/ |
9 |
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10 |
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import junit.framework.*; |
11 |
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import java.util.*; |
12 |
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import java.util.concurrent.*; |
13 |
jsr166 |
1.15 |
import java.util.concurrent.atomic.AtomicBoolean; |
14 |
dl |
1.1 |
import java.util.concurrent.locks.*; |
15 |
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|
16 |
jsr166 |
1.10 |
public class LockSupportTest extends JSR166TestCase { |
17 |
dl |
1.1 |
public static void main(String[] args) { |
18 |
jsr166 |
1.14 |
junit.textui.TestRunner.run(suite()); |
19 |
dl |
1.1 |
} |
20 |
jsr166 |
1.15 |
|
21 |
dl |
1.1 |
public static Test suite() { |
22 |
jsr166 |
1.12 |
return new TestSuite(LockSupportTest.class); |
23 |
dl |
1.1 |
} |
24 |
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|
25 |
dl |
1.3 |
/** |
26 |
jsr166 |
1.15 |
* park is released by subsequent unpark |
27 |
dl |
1.3 |
*/ |
28 |
jsr166 |
1.15 |
public void testParkBeforeUnpark() throws InterruptedException { |
29 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
30 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
31 |
jsr166 |
1.12 |
public void realRun() { |
32 |
jsr166 |
1.15 |
threadStarted.countDown(); |
33 |
jsr166 |
1.11 |
LockSupport.park(); |
34 |
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}}); |
35 |
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|
36 |
jsr166 |
1.15 |
threadStarted.await(); |
37 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
38 |
jsr166 |
1.15 |
LockSupport.unpark(t); |
39 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
40 |
jsr166 |
1.15 |
} |
41 |
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42 |
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/** |
43 |
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* parkUntil is released by subsequent unpark |
44 |
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*/ |
45 |
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public void testParkUntilBeforeUnpark() throws InterruptedException { |
46 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
47 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
48 |
jsr166 |
1.15 |
public void realRun() { |
49 |
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long d = new Date().getTime() + LONG_DELAY_MS; |
50 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
51 |
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long t0 = System.nanoTime(); |
52 |
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threadStarted.countDown(); |
53 |
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LockSupport.parkUntil(d); |
54 |
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assertTrue(System.nanoTime() - t0 < nanos); |
55 |
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}}); |
56 |
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57 |
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threadStarted.await(); |
58 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
59 |
jsr166 |
1.15 |
LockSupport.unpark(t); |
60 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
61 |
jsr166 |
1.15 |
} |
62 |
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63 |
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/** |
64 |
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* parkNanos is released by subsequent unpark |
65 |
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*/ |
66 |
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public void testParkNanosBeforeUnpark() throws InterruptedException { |
67 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
68 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
69 |
jsr166 |
1.15 |
public void realRun() { |
70 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
71 |
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long t0 = System.nanoTime(); |
72 |
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threadStarted.countDown(); |
73 |
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LockSupport.parkNanos(nanos); |
74 |
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assertTrue(System.nanoTime() - t0 < nanos); |
75 |
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}}); |
76 |
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77 |
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threadStarted.await(); |
78 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
79 |
jsr166 |
1.11 |
LockSupport.unpark(t); |
80 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
81 |
dl |
1.1 |
} |
82 |
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|
83 |
dl |
1.3 |
/** |
84 |
jsr166 |
1.15 |
* park is released by preceding unpark |
85 |
dl |
1.4 |
*/ |
86 |
jsr166 |
1.15 |
public void testParkAfterUnpark() throws Exception { |
87 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
88 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
89 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
90 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
91 |
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threadStarted.countDown(); |
92 |
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while (!unparked.get()) |
93 |
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Thread.yield(); |
94 |
jsr166 |
1.11 |
LockSupport.park(); |
95 |
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}}); |
96 |
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97 |
jsr166 |
1.15 |
threadStarted.await(); |
98 |
jsr166 |
1.11 |
LockSupport.unpark(t); |
99 |
jsr166 |
1.15 |
unparked.set(true); |
100 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
101 |
dl |
1.4 |
} |
102 |
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103 |
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/** |
104 |
jsr166 |
1.15 |
* parkUntil is released by preceding unpark |
105 |
dl |
1.4 |
*/ |
106 |
jsr166 |
1.15 |
public void testParkUntilAfterUnpark() throws Exception { |
107 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
108 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
109 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
110 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
111 |
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threadStarted.countDown(); |
112 |
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while (!unparked.get()) |
113 |
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Thread.yield(); |
114 |
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long d = new Date().getTime() + LONG_DELAY_MS; |
115 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
116 |
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long t0 = System.nanoTime(); |
117 |
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LockSupport.parkUntil(d); |
118 |
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assertTrue(System.nanoTime() - t0 < nanos); |
119 |
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}}); |
120 |
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121 |
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threadStarted.await(); |
122 |
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LockSupport.unpark(t); |
123 |
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unparked.set(true); |
124 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
125 |
jsr166 |
1.15 |
} |
126 |
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127 |
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/** |
128 |
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* parkNanos is released by preceding unpark |
129 |
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*/ |
130 |
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public void testParkNanosAfterUnpark() throws Exception { |
131 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
132 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
133 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
134 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
135 |
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threadStarted.countDown(); |
136 |
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while (!unparked.get()) |
137 |
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Thread.yield(); |
138 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
139 |
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long t0 = System.nanoTime(); |
140 |
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LockSupport.parkNanos(nanos); |
141 |
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assertTrue(System.nanoTime() - t0 < nanos); |
142 |
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}}); |
143 |
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144 |
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threadStarted.await(); |
145 |
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LockSupport.unpark(t); |
146 |
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unparked.set(true); |
147 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
148 |
jsr166 |
1.15 |
} |
149 |
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150 |
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/** |
151 |
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* park is released by subsequent interrupt |
152 |
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*/ |
153 |
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public void testParkBeforeInterrupt() throws InterruptedException { |
154 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
155 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
156 |
jsr166 |
1.12 |
public void realRun() { |
157 |
jsr166 |
1.15 |
assertFalse(Thread.currentThread().isInterrupted()); |
158 |
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threadStarted.countDown(); |
159 |
jsr166 |
1.17 |
do { |
160 |
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LockSupport.park(); |
161 |
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// park may return spuriously |
162 |
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} while (! Thread.currentThread().isInterrupted()); |
163 |
jsr166 |
1.15 |
}}); |
164 |
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165 |
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threadStarted.await(); |
166 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
167 |
jsr166 |
1.15 |
t.interrupt(); |
168 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
169 |
jsr166 |
1.15 |
} |
170 |
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171 |
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/** |
172 |
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* parkUntil is released by subsequent interrupt |
173 |
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*/ |
174 |
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public void testParkUntilBeforeInterrupt() throws InterruptedException { |
175 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
176 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
177 |
jsr166 |
1.15 |
public void realRun() { |
178 |
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long d = new Date().getTime() + LONG_DELAY_MS; |
179 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
180 |
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long t0 = System.nanoTime(); |
181 |
jsr166 |
1.17 |
assertFalse(Thread.currentThread().isInterrupted()); |
182 |
jsr166 |
1.15 |
threadStarted.countDown(); |
183 |
jsr166 |
1.17 |
do { |
184 |
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LockSupport.parkUntil(d); |
185 |
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// parkUntil may return spuriously |
186 |
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} while (! Thread.currentThread().isInterrupted()); |
187 |
jsr166 |
1.15 |
assertTrue(System.nanoTime() - t0 < nanos); |
188 |
jsr166 |
1.11 |
}}); |
189 |
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|
190 |
jsr166 |
1.15 |
threadStarted.await(); |
191 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
192 |
jsr166 |
1.11 |
t.interrupt(); |
193 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
194 |
dl |
1.4 |
} |
195 |
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196 |
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/** |
197 |
jsr166 |
1.15 |
* parkNanos is released by subsequent interrupt |
198 |
dl |
1.4 |
*/ |
199 |
jsr166 |
1.15 |
public void testParkNanosBeforeInterrupt() throws InterruptedException { |
200 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
201 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
202 |
jsr166 |
1.12 |
public void realRun() { |
203 |
jsr166 |
1.15 |
long nanos = LONG_DELAY_MS * 1000L * 1000L; |
204 |
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long t0 = System.nanoTime(); |
205 |
jsr166 |
1.17 |
assertFalse(Thread.currentThread().isInterrupted()); |
206 |
jsr166 |
1.15 |
threadStarted.countDown(); |
207 |
jsr166 |
1.17 |
do { |
208 |
|
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LockSupport.parkNanos(nanos); |
209 |
|
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// parkNanos may return spuriously |
210 |
|
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} while (! Thread.currentThread().isInterrupted()); |
211 |
jsr166 |
1.15 |
assertTrue(System.nanoTime() - t0 < nanos); |
212 |
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}}); |
213 |
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|
214 |
|
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threadStarted.await(); |
215 |
dl |
1.19 |
delay(SHORT_DELAY_MS); |
216 |
jsr166 |
1.15 |
t.interrupt(); |
217 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
218 |
jsr166 |
1.15 |
} |
219 |
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|
220 |
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/** |
221 |
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* park is released by preceding interrupt |
222 |
|
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*/ |
223 |
|
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public void testParkAfterInterrupt() throws Exception { |
224 |
|
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final CountDownLatch threadStarted = new CountDownLatch(1); |
225 |
|
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final AtomicBoolean unparked = new AtomicBoolean(false); |
226 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
227 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
228 |
|
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threadStarted.countDown(); |
229 |
|
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while (!unparked.get()) |
230 |
|
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Thread.yield(); |
231 |
|
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assertTrue(Thread.currentThread().isInterrupted()); |
232 |
jsr166 |
1.11 |
LockSupport.park(); |
233 |
jsr166 |
1.15 |
assertTrue(Thread.currentThread().isInterrupted()); |
234 |
|
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}}); |
235 |
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|
236 |
|
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threadStarted.await(); |
237 |
|
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t.interrupt(); |
238 |
|
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unparked.set(true); |
239 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
240 |
jsr166 |
1.15 |
} |
241 |
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|
242 |
|
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/** |
243 |
|
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* parkUntil is released by preceding interrupt |
244 |
|
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*/ |
245 |
|
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public void testParkUntilAfterInterrupt() throws Exception { |
246 |
|
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final CountDownLatch threadStarted = new CountDownLatch(1); |
247 |
|
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final AtomicBoolean unparked = new AtomicBoolean(false); |
248 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
249 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
250 |
|
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threadStarted.countDown(); |
251 |
|
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while (!unparked.get()) |
252 |
|
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Thread.yield(); |
253 |
|
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long d = new Date().getTime() + LONG_DELAY_MS; |
254 |
|
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
255 |
|
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long t0 = System.nanoTime(); |
256 |
jsr166 |
1.17 |
assertTrue(Thread.currentThread().isInterrupted()); |
257 |
jsr166 |
1.15 |
LockSupport.parkUntil(d); |
258 |
|
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assertTrue(System.nanoTime() - t0 < nanos); |
259 |
jsr166 |
1.17 |
assertTrue(Thread.currentThread().isInterrupted()); |
260 |
jsr166 |
1.15 |
}}); |
261 |
|
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|
262 |
|
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threadStarted.await(); |
263 |
|
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t.interrupt(); |
264 |
|
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unparked.set(true); |
265 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
266 |
jsr166 |
1.15 |
} |
267 |
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|
268 |
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/** |
269 |
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* parkNanos is released by preceding interrupt |
270 |
|
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*/ |
271 |
|
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public void testParkNanosAfterInterrupt() throws Exception { |
272 |
|
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final CountDownLatch threadStarted = new CountDownLatch(1); |
273 |
|
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final AtomicBoolean unparked = new AtomicBoolean(false); |
274 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
275 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
276 |
|
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threadStarted.countDown(); |
277 |
|
|
while (!unparked.get()) |
278 |
|
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Thread.yield(); |
279 |
|
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
280 |
|
|
long t0 = System.nanoTime(); |
281 |
jsr166 |
1.17 |
assertTrue(Thread.currentThread().isInterrupted()); |
282 |
jsr166 |
1.15 |
LockSupport.parkNanos(nanos); |
283 |
|
|
assertTrue(System.nanoTime() - t0 < nanos); |
284 |
jsr166 |
1.17 |
assertTrue(Thread.currentThread().isInterrupted()); |
285 |
jsr166 |
1.11 |
}}); |
286 |
|
|
|
287 |
jsr166 |
1.15 |
threadStarted.await(); |
288 |
jsr166 |
1.11 |
t.interrupt(); |
289 |
jsr166 |
1.15 |
unparked.set(true); |
290 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
291 |
dl |
1.4 |
} |
292 |
|
|
|
293 |
|
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/** |
294 |
|
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* parkNanos times out if not unparked |
295 |
dl |
1.3 |
*/ |
296 |
jsr166 |
1.15 |
public void testParkNanosTimesOut() throws InterruptedException { |
297 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
298 |
jsr166 |
1.12 |
public void realRun() { |
299 |
jsr166 |
1.17 |
for (;;) { |
300 |
|
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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 |
jsr166 |
1.11 |
}}); |
308 |
|
|
|
309 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
310 |
dl |
1.1 |
} |
311 |
|
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|
312 |
|
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|
313 |
dl |
1.3 |
/** |
314 |
dl |
1.4 |
* parkUntil times out if not unparked |
315 |
dl |
1.3 |
*/ |
316 |
jsr166 |
1.15 |
public void testParkUntilTimesOut() throws InterruptedException { |
317 |
jsr166 |
1.16 |
Thread t = newStartedThread(new CheckedRunnable() { |
318 |
jsr166 |
1.12 |
public void realRun() { |
319 |
jsr166 |
1.17 |
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 |
jsr166 |
1.15 |
}}); |
330 |
|
|
|
331 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
332 |
jsr166 |
1.15 |
} |
333 |
|
|
|
334 |
|
|
/** |
335 |
jsr166 |
1.20 |
* 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 |
jsr166 |
1.15 |
* parkUntil(0) returns immediately |
346 |
|
|
* Requires hotspot fix for: |
347 |
|
|
* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever |
348 |
|
|
*/ |
349 |
jsr166 |
1.16 |
public void XXXXtestParkUntil0Returns() throws InterruptedException { |
350 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
351 |
jsr166 |
1.15 |
public void realRun() { |
352 |
|
|
LockSupport.parkUntil(0L); |
353 |
jsr166 |
1.11 |
}}); |
354 |
|
|
|
355 |
jsr166 |
1.16 |
awaitTermination(t, MEDIUM_DELAY_MS); |
356 |
dl |
1.1 |
} |
357 |
|
|
} |