1 |
dl |
1.1 |
/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include John Vint |
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*/ |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import java.util.concurrent.*; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class PhaserTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(PhaserTest.class); |
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} |
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/** |
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* Empty constructor builds a new Phaser with no parent, no registered |
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* parties and initial phase number of 0 |
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*/ |
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public void testConstructor1() { |
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Phaser phaser = new Phaser(); |
31 |
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assertNull(phaser.getParent()); |
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assertEquals(0, phaser.getArrivedParties()); |
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assertEquals(0, phaser.getPhase()); |
34 |
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} |
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36 |
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/** |
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* A negative party number for the constructor throws illegal argument |
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* exception |
39 |
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*/ |
40 |
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public void testConstructor2() { |
41 |
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try { |
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new Phaser(-1); |
43 |
jsr166 |
1.6 |
shouldThrow(); |
44 |
jsr166 |
1.8 |
} catch (IllegalArgumentException success) {} |
45 |
dl |
1.1 |
} |
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/** |
48 |
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* The parent being input into the constructor should equal the original |
49 |
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* parent when being returned |
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*/ |
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public void testConstructor3() { |
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Phaser parent = new Phaser(); |
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assertEquals(parent, new Phaser(parent).getParent()); |
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} |
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/** |
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* A negative party number for the constructor throws illegal argument |
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* exception |
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*/ |
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public void testConstructor4() { |
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try { |
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new Phaser(new Phaser(), -1); |
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shouldThrow(); |
64 |
jsr166 |
1.8 |
} catch (IllegalArgumentException success) {} |
65 |
dl |
1.1 |
} |
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/** |
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* The parent being input into the parameter should equal the original |
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* parent when being returned |
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*/ |
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public void testConstructor5() { |
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Phaser parent = new Phaser(); |
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assertEquals(parent, new Phaser(parent, 0).getParent()); |
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} |
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/** |
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* register() will increment the number of unarrived parties by one and not |
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* affect its arrived parties |
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*/ |
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public void testRegister1() { |
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Phaser phaser = new Phaser(); |
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assertEquals(0, phaser.getUnarrivedParties()); |
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phaser.register(); |
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assertEquals(1, phaser.getUnarrivedParties()); |
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assertEquals(0, phaser.getArrivedParties()); |
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} |
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/** |
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jsr166 |
1.4 |
* Registering more than 65536 parties causes IllegalStateException |
90 |
dl |
1.1 |
*/ |
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public void testRegister2() { |
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Phaser phaser = new Phaser(0); |
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int expectedUnnarivedParties = (1 << 16) - 1; |
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for (int i = 0; i < expectedUnnarivedParties; i++) { |
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phaser.register(); |
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assertEquals(i + 1, phaser.getUnarrivedParties()); |
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} |
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try { |
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phaser.register(); |
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shouldThrow(); |
101 |
jsr166 |
1.8 |
} catch (IllegalStateException success) {} |
102 |
dl |
1.1 |
} |
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/** |
105 |
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* register() correctly returns the current barrier phase number when |
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* invoked |
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*/ |
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public void testRegister3() { |
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Phaser phaser = new Phaser(); |
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assertEquals(0, phaser.register()); |
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phaser.arrive(); |
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assertEquals(1, phaser.register()); |
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} |
114 |
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/** |
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* register causes the next arrive to not increment the phase rather retain |
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* the phase number |
118 |
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*/ |
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public void testRegister4() { |
120 |
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Phaser phaser = new Phaser(1); |
121 |
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phaser.arrive(); |
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int expectedPhase = phaser.register(); |
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phaser.arrive(); |
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assertEquals(expectedPhase, phaser.getPhase()); |
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} |
126 |
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127 |
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public void testRegister5() { |
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Phaser phaser = new Phaser(); |
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phaser.register(); |
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assertEquals(1, phaser.getUnarrivedParties()); |
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} |
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133 |
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/** |
134 |
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* Invoking bulkRegister with a negative parameter throws an |
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jsr166 |
1.4 |
* IllegalArgumentException |
136 |
dl |
1.1 |
*/ |
137 |
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public void testBulkRegister1() { |
138 |
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try { |
139 |
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new Phaser().bulkRegister(-1); |
140 |
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shouldThrow(); |
141 |
jsr166 |
1.8 |
} catch (IllegalArgumentException success) {} |
142 |
dl |
1.1 |
} |
143 |
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/** |
145 |
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* bulkRegister should correctly record the number of unarrived parties with |
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* the number of parties being registered |
147 |
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*/ |
148 |
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public void testBulkRegister2() { |
149 |
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Phaser phaser = new Phaser(); |
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phaser.bulkRegister(20); |
151 |
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assertEquals(20, phaser.getUnarrivedParties()); |
152 |
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} |
153 |
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/** |
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jsr166 |
1.4 |
* Registering with a number of parties greater than or equal to 1<<16 |
156 |
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* throws IllegalStateException. |
157 |
dl |
1.1 |
*/ |
158 |
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public void testBulkRegister3() { |
159 |
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try { |
160 |
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new Phaser().bulkRegister(1 << 16); |
161 |
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shouldThrow(); |
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jsr166 |
1.8 |
} catch (IllegalStateException success) {} |
163 |
dl |
1.1 |
} |
164 |
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/** |
166 |
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* the phase number increments correctly when tripping the barrier |
167 |
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*/ |
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public void testPhaseIncrement1() { |
169 |
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for (int size = 1; size < nine; size++) { |
170 |
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final Phaser phaser = new Phaser(size); |
171 |
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for (int index = 0; index <= (1 << size); index++) { |
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int phase = phaser.arrive(); |
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assertTrue(index % size == 0 ? (index / size) == phase : index - (phase * size) > 0); |
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} |
175 |
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} |
176 |
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} |
177 |
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/** |
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* Arrive() on a registered phaser increments phase. |
180 |
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*/ |
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public void testArrive1() { |
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Phaser phaser = new Phaser(1); |
183 |
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phaser.arrive(); |
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assertEquals(1, phaser.getPhase()); |
185 |
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} |
186 |
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187 |
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/** |
188 |
jsr166 |
1.7 |
* arriveAndDeregister does not wait for others to arrive at barrier |
189 |
dl |
1.1 |
*/ |
190 |
jsr166 |
1.7 |
public void testArrive2() throws InterruptedException { |
191 |
dl |
1.1 |
final Phaser phaser = new Phaser(1); |
192 |
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phaser.register(); |
193 |
jsr166 |
1.7 |
List<Thread> threads = new ArrayList<Thread>(); |
194 |
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for (int i = 0; i < 10; i++) |
195 |
dl |
1.1 |
phaser.register(); |
196 |
jsr166 |
1.7 |
threads.add(newStartedThread(new CheckedRunnable() { |
197 |
jsr166 |
1.9 |
public void realRun() throws InterruptedException { |
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jsr166 |
1.7 |
Thread.sleep(SMALL_DELAY_MS); |
199 |
dl |
1.1 |
phaser.arriveAndDeregister(); |
200 |
jsr166 |
1.7 |
}})); |
201 |
dl |
1.1 |
|
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phaser.arrive(); |
203 |
jsr166 |
1.7 |
assertTrue(threads.get(0).isAlive()); |
204 |
dl |
1.1 |
assertFalse(phaser.isTerminated()); |
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jsr166 |
1.7 |
for (Thread thread : threads) |
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thread.join(); |
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dl |
1.1 |
} |
208 |
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209 |
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/** |
210 |
jsr166 |
1.3 |
* arrive() returns a negative number if the Phaser is terminated |
211 |
dl |
1.1 |
*/ |
212 |
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public void testArrive3() { |
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Phaser phaser = new Phaser(1); |
214 |
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phaser.forceTermination(); |
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assertTrue(phaser.arrive() < 0); |
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} |
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/** |
219 |
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* arriveAndDeregister() throws IllegalStateException if number of |
220 |
jsr166 |
1.3 |
* registered or unarrived parties would become negative |
221 |
dl |
1.1 |
*/ |
222 |
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public void testArriveAndDeregister1() { |
223 |
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try { |
224 |
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Phaser phaser = new Phaser(); |
225 |
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phaser.arriveAndDeregister(); |
226 |
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shouldThrow(); |
227 |
jsr166 |
1.8 |
} catch (IllegalStateException success) {} |
228 |
dl |
1.1 |
} |
229 |
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230 |
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/** |
231 |
jsr166 |
1.3 |
* arriveAndDeregister deregisters reduces the number of arrived parties |
232 |
dl |
1.1 |
*/ |
233 |
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public void testArriveAndDergeister2() { |
234 |
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final Phaser phaser = new Phaser(1); |
235 |
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phaser.register(); |
236 |
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phaser.arrive(); |
237 |
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int p = phaser.getArrivedParties(); |
238 |
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assertTrue(p == 1); |
239 |
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phaser.arriveAndDeregister(); |
240 |
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assertTrue(phaser.getArrivedParties() < p); |
241 |
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} |
242 |
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243 |
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/** |
244 |
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* arriveAndDeregister arrives to the barrier on a phaser with a parent and |
245 |
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* when a deregistration occurs and causes the phaser to have zero parties |
246 |
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* its parent will be deregistered as well |
247 |
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*/ |
248 |
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public void testArriveAndDeregsiter3() { |
249 |
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Phaser parent = new Phaser(); |
250 |
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Phaser root = new Phaser(parent); |
251 |
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root.register(); |
252 |
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assertTrue(parent.getUnarrivedParties() > 0); |
253 |
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assertTrue(root.getUnarrivedParties() > 0); |
254 |
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root.arriveAndDeregister(); |
255 |
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assertTrue(parent.getUnarrivedParties() == 0); |
256 |
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assertTrue(root.getUnarrivedParties() == 0); |
257 |
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assertTrue(root.isTerminated() && parent.isTerminated()); |
258 |
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} |
259 |
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260 |
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/** |
261 |
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* arriveAndDeregister deregisters one party from its parent when |
262 |
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* the number of parties of root is zero after deregistration |
263 |
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*/ |
264 |
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public void testArriveAndDeregsiter4() { |
265 |
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Phaser parent = new Phaser(); |
266 |
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Phaser root = new Phaser(parent); |
267 |
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parent.register(); |
268 |
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root.register(); |
269 |
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int parentParties = parent.getUnarrivedParties(); |
270 |
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root.arriveAndDeregister(); |
271 |
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assertEquals(parentParties - 1, parent.getUnarrivedParties()); |
272 |
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} |
273 |
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274 |
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/** |
275 |
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* arriveAndDeregister deregisters one party from its parent when |
276 |
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* the number of parties of root is nonzero after deregistration. |
277 |
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*/ |
278 |
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public void testArriveAndDeregister5() { |
279 |
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Phaser parent = new Phaser(); |
280 |
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Phaser child = new Phaser(parent); |
281 |
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Phaser root = new Phaser(child); |
282 |
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assertTrue(parent.getUnarrivedParties() > 0); |
283 |
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assertTrue(child.getUnarrivedParties() > 0); |
284 |
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root.register(); |
285 |
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root.arriveAndDeregister(); |
286 |
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assertTrue(parent.getUnarrivedParties() == 0); |
287 |
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assertTrue(child.getUnarrivedParties() == 0); |
288 |
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assertTrue(root.isTerminated()); |
289 |
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} |
290 |
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291 |
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/** |
292 |
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* arriveAndDeregister returns the phase in which it leaves the |
293 |
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* phaser in after deregistration |
294 |
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*/ |
295 |
jsr166 |
1.7 |
public void testArriveAndDeregister6() throws InterruptedException { |
296 |
dl |
1.1 |
final Phaser phaser = new Phaser(2); |
297 |
jsr166 |
1.7 |
Thread t = newStartedThread(new CheckedRunnable() { |
298 |
jsr166 |
1.9 |
public void realRun() { |
299 |
jsr166 |
1.7 |
sleepTillInterrupted(SHORT_DELAY_MS); |
300 |
dl |
1.1 |
phaser.arrive(); |
301 |
jsr166 |
1.7 |
}}); |
302 |
dl |
1.1 |
phaser.arriveAndAwaitAdvance(); |
303 |
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int phase = phaser.arriveAndDeregister(); |
304 |
|
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assertEquals(phase, phaser.getPhase()); |
305 |
jsr166 |
1.7 |
t.join(); |
306 |
dl |
1.1 |
} |
307 |
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308 |
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/** |
309 |
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* awaitAdvance succeeds upon advance |
310 |
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*/ |
311 |
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public void testAwaitAdvance1() { |
312 |
|
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final Phaser phaser = new Phaser(1); |
313 |
|
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phaser.awaitAdvance(phaser.arrive()); |
314 |
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} |
315 |
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316 |
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/** |
317 |
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* awaitAdvance with a negative parameter will return without affecting the |
318 |
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* phaser |
319 |
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*/ |
320 |
|
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public void testAwaitAdvance2() { |
321 |
jsr166 |
1.6 |
Phaser phaser = new Phaser(); |
322 |
|
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phaser.awaitAdvance(-1); |
323 |
dl |
1.1 |
} |
324 |
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325 |
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/** |
326 |
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* awaitAdvance while waiting does not abort on interrupt. |
327 |
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*/ |
328 |
jsr166 |
1.6 |
public void testAwaitAdvance3() throws InterruptedException { |
329 |
dl |
1.1 |
final Phaser phaser = new Phaser(); |
330 |
jsr166 |
1.7 |
phaser.register(); |
331 |
dl |
1.1 |
|
332 |
jsr166 |
1.7 |
Thread t = newStartedThread(new CheckedRunnable() { |
333 |
jsr166 |
1.9 |
public void realRun() throws InterruptedException { |
334 |
jsr166 |
1.5 |
phaser.register(); |
335 |
jsr166 |
1.7 |
sleepTillInterrupted(LONG_DELAY_MS); |
336 |
jsr166 |
1.5 |
phaser.awaitAdvance(phaser.arrive()); |
337 |
|
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}}); |
338 |
jsr166 |
1.7 |
Thread.sleep(SMALL_DELAY_MS); |
339 |
|
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t.interrupt(); |
340 |
|
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Thread.sleep(SMALL_DELAY_MS); |
341 |
jsr166 |
1.6 |
phaser.arrive(); |
342 |
jsr166 |
1.7 |
assertFalse(t.isInterrupted()); |
343 |
|
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t.join(); |
344 |
dl |
1.1 |
} |
345 |
|
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|
346 |
|
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/** |
347 |
|
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* awaitAdvance atomically waits for all parties within the same phase to |
348 |
|
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* complete before continuing |
349 |
|
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*/ |
350 |
jsr166 |
1.5 |
public void testAwaitAdvance4() throws InterruptedException { |
351 |
|
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final Phaser phaser = new Phaser(4); |
352 |
dl |
1.1 |
final AtomicInteger phaseCount = new AtomicInteger(0); |
353 |
jsr166 |
1.5 |
List<Thread> threads = new ArrayList<Thread>(); |
354 |
|
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for (int i = 0; i < 4; i++) { |
355 |
jsr166 |
1.7 |
threads.add(newStartedThread(new CheckedRunnable() { |
356 |
jsr166 |
1.9 |
public void realRun() { |
357 |
dl |
1.1 |
int phase = phaser.arrive(); |
358 |
|
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phaseCount.incrementAndGet(); |
359 |
jsr166 |
1.7 |
sleepTillInterrupted(SMALL_DELAY_MS); |
360 |
dl |
1.1 |
phaser.awaitAdvance(phase); |
361 |
jsr166 |
1.10 |
assertEquals(phaseCount.get(), 4); |
362 |
jsr166 |
1.5 |
}})); |
363 |
dl |
1.1 |
} |
364 |
jsr166 |
1.5 |
for (Thread thread : threads) |
365 |
|
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thread.join(); |
366 |
dl |
1.1 |
} |
367 |
|
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|
368 |
|
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/** |
369 |
|
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* awaitAdvance returns the current phase |
370 |
|
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*/ |
371 |
jsr166 |
1.7 |
public void testAwaitAdvance5() throws InterruptedException { |
372 |
dl |
1.1 |
final Phaser phaser = new Phaser(1); |
373 |
|
|
int phase = phaser.awaitAdvance(phaser.arrive()); |
374 |
|
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assertEquals(phase, phaser.getPhase()); |
375 |
|
|
phaser.register(); |
376 |
jsr166 |
1.7 |
List<Thread> threads = new ArrayList<Thread>(); |
377 |
|
|
for (int i = 0; i < 8; i++) { |
378 |
|
|
threads.add(newStartedThread(new CheckedRunnable() { |
379 |
jsr166 |
1.9 |
public void realRun() { |
380 |
jsr166 |
1.7 |
sleepTillInterrupted(SHORT_DELAY_MS); |
381 |
dl |
1.1 |
phaser.arrive(); |
382 |
jsr166 |
1.7 |
}})); |
383 |
dl |
1.1 |
phase = phaser.awaitAdvance(phaser.arrive()); |
384 |
jsr166 |
1.10 |
assertEquals(phase, phaser.getPhase()); |
385 |
dl |
1.1 |
} |
386 |
jsr166 |
1.7 |
for (Thread thread : threads) |
387 |
|
|
thread.join(); |
388 |
dl |
1.1 |
} |
389 |
|
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|
390 |
|
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/** |
391 |
|
|
* awaitAdvance returns when the phaser is externally terminated |
392 |
|
|
*/ |
393 |
jsr166 |
1.7 |
public void testAwaitAdvance6() throws InterruptedException { |
394 |
dl |
1.1 |
final Phaser phaser = new Phaser(3); |
395 |
|
|
/* |
396 |
|
|
* Start new thread. This thread waits a small amount of time |
397 |
|
|
* and waits for the other two parties to arrive. The party |
398 |
|
|
* in the main thread arrives quickly so at best this thread |
399 |
|
|
* waits for the second thread's party to arrive |
400 |
|
|
*/ |
401 |
jsr166 |
1.7 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
402 |
jsr166 |
1.9 |
public void realRun() { |
403 |
jsr166 |
1.7 |
sleepTillInterrupted(SMALL_DELAY_MS); |
404 |
dl |
1.1 |
int phase = phaser.awaitAdvance(phaser.arrive()); |
405 |
|
|
/* |
406 |
|
|
* This point is reached when force termination is called in which phase = -1 |
407 |
|
|
*/ |
408 |
jsr166 |
1.10 |
assertTrue(phase < 0); |
409 |
|
|
assertTrue(phaser.isTerminated()); |
410 |
jsr166 |
1.7 |
}}); |
411 |
dl |
1.1 |
/* |
412 |
|
|
* This thread will cause the first thread run to wait, in doing so |
413 |
jsr166 |
1.2 |
* the main thread will force termination in which the first thread |
414 |
|
|
* should exit peacefully as this one |
415 |
dl |
1.1 |
*/ |
416 |
jsr166 |
1.7 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
417 |
jsr166 |
1.9 |
public void realRun() { |
418 |
jsr166 |
1.7 |
sleepTillInterrupted(MEDIUM_DELAY_MS); |
419 |
dl |
1.1 |
int p1 = phaser.arrive(); |
420 |
|
|
int phase = phaser.awaitAdvance(p1); |
421 |
jsr166 |
1.10 |
assertTrue(phase < 0); |
422 |
|
|
assertTrue(phaser.isTerminated()); |
423 |
jsr166 |
1.7 |
}}); |
424 |
dl |
1.1 |
|
425 |
|
|
phaser.arrive(); |
426 |
|
|
phaser.forceTermination(); |
427 |
jsr166 |
1.7 |
t1.join(); |
428 |
|
|
t2.join(); |
429 |
dl |
1.1 |
} |
430 |
|
|
|
431 |
|
|
/** |
432 |
|
|
* arriveAndAwaitAdvance throws IllegalStateException with no |
433 |
|
|
* unarrived parties |
434 |
|
|
*/ |
435 |
|
|
public void testArriveAndAwaitAdvance1() { |
436 |
|
|
try { |
437 |
|
|
Phaser phaser = new Phaser(); |
438 |
|
|
phaser.arriveAndAwaitAdvance(); |
439 |
|
|
shouldThrow(); |
440 |
jsr166 |
1.8 |
} catch (IllegalStateException success) {} |
441 |
dl |
1.1 |
} |
442 |
|
|
|
443 |
|
|
/** |
444 |
|
|
* Interrupted arriveAndAwaitAdvance does not throw InterruptedException |
445 |
|
|
*/ |
446 |
jsr166 |
1.6 |
public void testArriveAndAwaitAdvance2() throws InterruptedException { |
447 |
dl |
1.1 |
final Phaser phaser = new Phaser(2); |
448 |
jsr166 |
1.7 |
Thread th = newStartedThread(new CheckedRunnable() { |
449 |
jsr166 |
1.9 |
public void realRun() { |
450 |
jsr166 |
1.5 |
phaser.arriveAndAwaitAdvance(); |
451 |
|
|
}}); |
452 |
dl |
1.1 |
|
453 |
jsr166 |
1.7 |
Thread.sleep(SMALL_DELAY_MS); |
454 |
jsr166 |
1.6 |
th.interrupt(); |
455 |
jsr166 |
1.7 |
Thread.sleep(SMALL_DELAY_MS); |
456 |
jsr166 |
1.6 |
phaser.arrive(); |
457 |
dl |
1.1 |
assertFalse(th.isInterrupted()); |
458 |
jsr166 |
1.7 |
th.join(); |
459 |
dl |
1.1 |
} |
460 |
|
|
|
461 |
|
|
/** |
462 |
|
|
* arriveAndAwaitAdvance waits for all threads to arrive, the |
463 |
|
|
* number of arrived parties is the same number that is accounted |
464 |
|
|
* for when the main thread awaitsAdvance |
465 |
|
|
*/ |
466 |
jsr166 |
1.7 |
public void testArriveAndAwaitAdvance3() throws InterruptedException { |
467 |
dl |
1.1 |
final Phaser phaser = new Phaser(1); |
468 |
jsr166 |
1.7 |
final List<Thread> threads = new ArrayList<Thread>(); |
469 |
dl |
1.11 |
for (int i = 0; i < 3; i++) { |
470 |
jsr166 |
1.7 |
threads.add(newStartedThread(new CheckedRunnable() { |
471 |
dl |
1.11 |
public void realRun() throws InterruptedException { |
472 |
|
|
phaser.register(); |
473 |
dl |
1.12 |
phaser.arriveAndAwaitAdvance(); |
474 |
dl |
1.11 |
}})); |
475 |
dl |
1.1 |
} |
476 |
dl |
1.11 |
Thread.sleep(LONG_DELAY_MS); |
477 |
|
|
assertEquals(phaser.getArrivedParties(), 3); |
478 |
dl |
1.12 |
phaser.arriveAndAwaitAdvance(); |
479 |
jsr166 |
1.7 |
for (Thread thread : threads) |
480 |
|
|
thread.join(); |
481 |
dl |
1.1 |
} |
482 |
|
|
|
483 |
|
|
} |