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dl |
1.1 |
/* |
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jsr166 |
1.15 |
* Written by Doug Lea and Martin Buchholz with assistance from |
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* members of JCP JSR-166 Expert Group and released to the public |
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* domain, as explained at |
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dl |
1.5 |
* http://creativecommons.org/licenses/publicdomain |
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jsr166 |
1.8 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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dl |
1.1 |
*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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jsr166 |
1.15 |
import java.util.concurrent.atomic.AtomicBoolean; |
14 |
dl |
1.1 |
import java.util.concurrent.locks.*; |
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|
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jsr166 |
1.10 |
public class LockSupportTest extends JSR166TestCase { |
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dl |
1.1 |
public static void main(String[] args) { |
18 |
jsr166 |
1.14 |
junit.textui.TestRunner.run(suite()); |
19 |
dl |
1.1 |
} |
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jsr166 |
1.15 |
|
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dl |
1.1 |
public static Test suite() { |
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jsr166 |
1.12 |
return new TestSuite(LockSupportTest.class); |
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dl |
1.1 |
} |
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dl |
1.3 |
/** |
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jsr166 |
1.15 |
* park is released by subsequent unpark |
27 |
dl |
1.3 |
*/ |
28 |
jsr166 |
1.15 |
public void testParkBeforeUnpark() throws InterruptedException { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() { |
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jsr166 |
1.15 |
threadStarted.countDown(); |
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jsr166 |
1.11 |
LockSupport.park(); |
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}}); |
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t.start(); |
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jsr166 |
1.15 |
threadStarted.await(); |
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Thread.sleep(SHORT_DELAY_MS); |
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LockSupport.unpark(t); |
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joinWith(t); |
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} |
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/** |
44 |
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* parkUntil is released by subsequent unpark |
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*/ |
46 |
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public void testParkUntilBeforeUnpark() throws InterruptedException { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() { |
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long d = new Date().getTime() + LONG_DELAY_MS; |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
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long t0 = System.nanoTime(); |
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threadStarted.countDown(); |
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LockSupport.parkUntil(d); |
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assertTrue(System.nanoTime() - t0 < nanos); |
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}}); |
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t.start(); |
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threadStarted.await(); |
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Thread.sleep(SHORT_DELAY_MS); |
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LockSupport.unpark(t); |
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joinWith(t); |
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} |
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/** |
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* parkNanos is released by subsequent unpark |
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*/ |
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public void testParkNanosBeforeUnpark() throws InterruptedException { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() { |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
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long t0 = System.nanoTime(); |
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threadStarted.countDown(); |
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LockSupport.parkNanos(nanos); |
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assertTrue(System.nanoTime() - t0 < nanos); |
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}}); |
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t.start(); |
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threadStarted.await(); |
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jsr166 |
1.11 |
Thread.sleep(SHORT_DELAY_MS); |
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LockSupport.unpark(t); |
83 |
jsr166 |
1.15 |
joinWith(t); |
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dl |
1.1 |
} |
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|
86 |
dl |
1.3 |
/** |
87 |
jsr166 |
1.15 |
* park is released by preceding unpark |
88 |
dl |
1.4 |
*/ |
89 |
jsr166 |
1.15 |
public void testParkAfterUnpark() throws Exception { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
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jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
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jsr166 |
1.15 |
public void realRun() throws Exception { |
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threadStarted.countDown(); |
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while (!unparked.get()) |
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Thread.yield(); |
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jsr166 |
1.11 |
LockSupport.park(); |
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}}); |
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t.start(); |
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jsr166 |
1.15 |
threadStarted.await(); |
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jsr166 |
1.11 |
LockSupport.unpark(t); |
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jsr166 |
1.15 |
unparked.set(true); |
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joinWith(t); |
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dl |
1.4 |
} |
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/** |
108 |
jsr166 |
1.15 |
* parkUntil is released by preceding unpark |
109 |
dl |
1.4 |
*/ |
110 |
jsr166 |
1.15 |
public void testParkUntilAfterUnpark() throws Exception { |
111 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
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Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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threadStarted.countDown(); |
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while (!unparked.get()) |
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Thread.yield(); |
118 |
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long d = new Date().getTime() + LONG_DELAY_MS; |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
120 |
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long t0 = System.nanoTime(); |
121 |
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LockSupport.parkUntil(d); |
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assertTrue(System.nanoTime() - t0 < nanos); |
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}}); |
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t.start(); |
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threadStarted.await(); |
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LockSupport.unpark(t); |
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unparked.set(true); |
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joinWith(t); |
130 |
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} |
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/** |
133 |
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* parkNanos is released by preceding unpark |
134 |
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*/ |
135 |
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public void testParkNanosAfterUnpark() throws Exception { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
137 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
138 |
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Thread t = new Thread(new CheckedRunnable() { |
139 |
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public void realRun() throws Exception { |
140 |
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threadStarted.countDown(); |
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while (!unparked.get()) |
142 |
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Thread.yield(); |
143 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
144 |
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long t0 = System.nanoTime(); |
145 |
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LockSupport.parkNanos(nanos); |
146 |
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assertTrue(System.nanoTime() - t0 < nanos); |
147 |
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}}); |
148 |
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149 |
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t.start(); |
150 |
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threadStarted.await(); |
151 |
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LockSupport.unpark(t); |
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unparked.set(true); |
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joinWith(t); |
154 |
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} |
155 |
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156 |
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/** |
157 |
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* park is released by subsequent interrupt |
158 |
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*/ |
159 |
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public void testParkBeforeInterrupt() throws InterruptedException { |
160 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
161 |
jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
162 |
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public void realRun() { |
163 |
jsr166 |
1.15 |
assertFalse(Thread.currentThread().isInterrupted()); |
164 |
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threadStarted.countDown(); |
165 |
jsr166 |
1.11 |
LockSupport.park(); |
166 |
jsr166 |
1.15 |
assertTrue(Thread.currentThread().isInterrupted()); |
167 |
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}}); |
168 |
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t.start(); |
170 |
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threadStarted.await(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
173 |
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joinWith(t); |
174 |
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} |
175 |
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/** |
177 |
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* parkUntil is released by subsequent interrupt |
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*/ |
179 |
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public void testParkUntilBeforeInterrupt() throws InterruptedException { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
181 |
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Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() { |
183 |
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long d = new Date().getTime() + LONG_DELAY_MS; |
184 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
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long t0 = System.nanoTime(); |
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threadStarted.countDown(); |
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LockSupport.parkUntil(d); |
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assertTrue(System.nanoTime() - t0 < nanos); |
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jsr166 |
1.11 |
}}); |
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t.start(); |
192 |
jsr166 |
1.15 |
threadStarted.await(); |
193 |
jsr166 |
1.11 |
Thread.sleep(SHORT_DELAY_MS); |
194 |
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t.interrupt(); |
195 |
jsr166 |
1.15 |
joinWith(t); |
196 |
dl |
1.4 |
} |
197 |
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198 |
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/** |
199 |
jsr166 |
1.15 |
* parkNanos is released by subsequent interrupt |
200 |
dl |
1.4 |
*/ |
201 |
jsr166 |
1.15 |
public void testParkNanosBeforeInterrupt() throws InterruptedException { |
202 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
203 |
jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
204 |
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public void realRun() { |
205 |
jsr166 |
1.15 |
long nanos = LONG_DELAY_MS * 1000L * 1000L; |
206 |
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long t0 = System.nanoTime(); |
207 |
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threadStarted.countDown(); |
208 |
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LockSupport.parkNanos(nanos); |
209 |
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assertTrue(System.nanoTime() - t0 < nanos); |
210 |
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}}); |
211 |
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212 |
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t.start(); |
213 |
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threadStarted.await(); |
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Thread.sleep(SHORT_DELAY_MS); |
215 |
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t.interrupt(); |
216 |
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joinWith(t); |
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} |
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219 |
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/** |
220 |
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* park is released by preceding interrupt |
221 |
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*/ |
222 |
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public void testParkAfterInterrupt() throws Exception { |
223 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
224 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
225 |
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Thread t = new Thread(new CheckedRunnable() { |
226 |
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public void realRun() throws Exception { |
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threadStarted.countDown(); |
228 |
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while (!unparked.get()) |
229 |
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Thread.yield(); |
230 |
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assertTrue(Thread.currentThread().isInterrupted()); |
231 |
jsr166 |
1.11 |
LockSupport.park(); |
232 |
jsr166 |
1.15 |
assertTrue(Thread.currentThread().isInterrupted()); |
233 |
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}}); |
234 |
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235 |
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t.start(); |
236 |
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threadStarted.await(); |
237 |
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t.interrupt(); |
238 |
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unparked.set(true); |
239 |
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joinWith(t); |
240 |
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} |
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 |
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Thread t = new Thread(new CheckedRunnable() { |
249 |
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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 |
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LockSupport.parkUntil(d); |
257 |
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assertTrue(System.nanoTime() - t0 < nanos); |
258 |
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}}); |
259 |
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260 |
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t.start(); |
261 |
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threadStarted.await(); |
262 |
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t.interrupt(); |
263 |
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unparked.set(true); |
264 |
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joinWith(t); |
265 |
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} |
266 |
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267 |
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/** |
268 |
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* parkNanos is released by preceding interrupt |
269 |
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*/ |
270 |
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public void testParkNanosAfterInterrupt() throws Exception { |
271 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
272 |
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final AtomicBoolean unparked = new AtomicBoolean(false); |
273 |
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Thread t = new Thread(new CheckedRunnable() { |
274 |
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public void realRun() throws Exception { |
275 |
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threadStarted.countDown(); |
276 |
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while (!unparked.get()) |
277 |
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Thread.yield(); |
278 |
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long nanos = LONG_DELAY_MS * 1000L * 1000L; |
279 |
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long t0 = System.nanoTime(); |
280 |
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LockSupport.parkNanos(nanos); |
281 |
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assertTrue(System.nanoTime() - t0 < nanos); |
282 |
jsr166 |
1.11 |
}}); |
283 |
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284 |
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t.start(); |
285 |
jsr166 |
1.15 |
threadStarted.await(); |
286 |
jsr166 |
1.11 |
t.interrupt(); |
287 |
jsr166 |
1.15 |
unparked.set(true); |
288 |
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joinWith(t); |
289 |
dl |
1.4 |
} |
290 |
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291 |
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/** |
292 |
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* parkNanos times out if not unparked |
293 |
dl |
1.3 |
*/ |
294 |
jsr166 |
1.15 |
public void testParkNanosTimesOut() throws InterruptedException { |
295 |
jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
296 |
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public void realRun() { |
297 |
jsr166 |
1.15 |
final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L; |
298 |
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long t0 = System.nanoTime(); |
299 |
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LockSupport.parkNanos(timeoutNanos); |
300 |
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assertTrue(System.nanoTime() - t0 >= timeoutNanos); |
301 |
jsr166 |
1.11 |
}}); |
302 |
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303 |
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t.start(); |
304 |
jsr166 |
1.15 |
joinWith(t); |
305 |
dl |
1.1 |
} |
306 |
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307 |
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|
308 |
dl |
1.3 |
/** |
309 |
dl |
1.4 |
* parkUntil times out if not unparked |
310 |
dl |
1.3 |
*/ |
311 |
jsr166 |
1.15 |
public void testParkUntilTimesOut() throws InterruptedException { |
312 |
jsr166 |
1.12 |
Thread t = new Thread(new CheckedRunnable() { |
313 |
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public void realRun() { |
314 |
jsr166 |
1.15 |
long d = new Date().getTime() + SHORT_DELAY_MS; |
315 |
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// beware of rounding |
316 |
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long timeoutNanos = (SHORT_DELAY_MS - 1) * 1000L * 1000L; |
317 |
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long t0 = System.nanoTime(); |
318 |
jsr166 |
1.11 |
LockSupport.parkUntil(d); |
319 |
jsr166 |
1.15 |
assertTrue(System.nanoTime() - t0 >= timeoutNanos); |
320 |
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}}); |
321 |
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322 |
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t.start(); |
323 |
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joinWith(t); |
324 |
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} |
325 |
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326 |
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/** |
327 |
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* parkUntil(0) returns immediately |
328 |
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* Requires hotspot fix for: |
329 |
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* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever |
330 |
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*/ |
331 |
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public void XXXtestParkUntil0Returns() throws InterruptedException { |
332 |
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Thread t = new Thread(new CheckedRunnable() { |
333 |
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public void realRun() { |
334 |
|
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LockSupport.parkUntil(0L); |
335 |
jsr166 |
1.11 |
}}); |
336 |
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337 |
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t.start(); |
338 |
jsr166 |
1.15 |
joinWith(t); |
339 |
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} |
340 |
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341 |
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private void joinWith(Thread t) throws InterruptedException { |
342 |
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t.join(MEDIUM_DELAY_MS); |
343 |
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if (t.isAlive()) { |
344 |
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fail("Test timed out"); |
345 |
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t.interrupt(); |
346 |
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} |
347 |
dl |
1.1 |
} |
348 |
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} |