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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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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 Andrew Wright, Jeffrey Hayes, |
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> |
* Pat Fisher, Mike Judd. |
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*/ |
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|
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import junit.framework.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.*; |
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import java.io.*; |
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import java.util.*; |
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|
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< |
public class ReentrantReadWriteLockTest extends TestCase { |
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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|
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> |
public class ReentrantReadWriteLockTest 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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|
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public static Test suite() { |
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return new TestSuite(ReentrantReadWriteLockTest.class); |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly |
25 |
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*/ |
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class InterruptibleLockRunnable implements Runnable { |
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final ReentrantReadWriteLock lock; |
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InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
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public void run() { |
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try { |
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lock.writeLock().lockInterruptibly(); |
32 |
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} catch(InterruptedException success){} |
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} |
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} |
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|
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|
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/** |
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* A runnable calling lockInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedLockRunnable implements Runnable { |
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final ReentrantReadWriteLock lock; |
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InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
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public void run() { |
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try { |
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lock.writeLock().lockInterruptibly(); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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} |
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} |
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|
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/** |
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* Subclass to expose protected methods |
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*/ |
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static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
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PublicReentrantReadWriteLock() { super(); } |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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public Collection<Thread> getWaitingThreads(Condition c) { |
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return super.getWaitingThreads(c); |
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} |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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|
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/* |
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* Unlocks an unlocked lock, throws Illegal Monitor State |
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* |
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/** |
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* Constructor sets given fairness, and is in unlocked state |
67 |
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*/ |
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public void testConstructor() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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assertFalse(rl.isFair()); |
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assertFalse(rl.isWriteLocked()); |
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assertEquals(0, rl.getReadLockCount()); |
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ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
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assertTrue(r2.isFair()); |
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assertFalse(r2.isWriteLocked()); |
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assertEquals(0, r2.getReadLockCount()); |
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} |
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|
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/** |
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* write-locking and read-locking an unlocked lock succeed |
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*/ |
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public void testLock() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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rl.writeLock().lock(); |
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assertTrue(rl.isWriteLocked()); |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.writeLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.readLock().lock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(1, rl.getReadLockCount()); |
96 |
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rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
100 |
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} |
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|
102 |
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|
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/** |
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* locking an unlocked fair lock succeeds |
105 |
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*/ |
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public void testFairLock() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
108 |
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rl.writeLock().lock(); |
109 |
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assertTrue(rl.isWriteLocked()); |
110 |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
111 |
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assertEquals(0, rl.getReadLockCount()); |
112 |
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rl.writeLock().unlock(); |
113 |
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assertFalse(rl.isWriteLocked()); |
114 |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
115 |
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assertEquals(0, rl.getReadLockCount()); |
116 |
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rl.readLock().lock(); |
117 |
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assertFalse(rl.isWriteLocked()); |
118 |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
119 |
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assertEquals(1, rl.getReadLockCount()); |
120 |
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rl.readLock().unlock(); |
121 |
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assertFalse(rl.isWriteLocked()); |
122 |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
123 |
+ |
assertEquals(0, rl.getReadLockCount()); |
124 |
+ |
} |
125 |
+ |
|
126 |
+ |
/** |
127 |
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* getWriteHoldCount returns number of recursive holds |
128 |
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*/ |
129 |
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public void testGetHoldCount() { |
130 |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
131 |
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for(int i = 1; i <= SIZE; i++) { |
132 |
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lock.writeLock().lock(); |
133 |
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assertEquals(i,lock.getWriteHoldCount()); |
134 |
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} |
135 |
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for(int i = SIZE; i > 0; i--) { |
136 |
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lock.writeLock().unlock(); |
137 |
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assertEquals(i-1,lock.getWriteHoldCount()); |
138 |
+ |
} |
139 |
+ |
} |
140 |
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|
141 |
< |
public void testIllegalMonitorStateException(){ |
141 |
> |
|
142 |
> |
/** |
143 |
> |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
144 |
> |
*/ |
145 |
> |
public void testUnlock_IllegalMonitorStateException() { |
146 |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
147 |
< |
try{ |
147 |
> |
try { |
148 |
|
rl.writeLock().unlock(); |
149 |
< |
fail("Should of thown Illegal Monitor State Exception"); |
149 |
> |
shouldThrow(); |
150 |
> |
} catch(IllegalMonitorStateException success){} |
151 |
> |
} |
152 |
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|
39 |
– |
}catch(IllegalMonitorStateException sucess){} |
153 |
|
|
154 |
+ |
/** |
155 |
+ |
* write-lockInterruptibly is interruptible |
156 |
+ |
*/ |
157 |
+ |
public void testWriteLockInterruptibly_Interrupted() { |
158 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
159 |
+ |
Thread t = new Thread(new Runnable() { |
160 |
+ |
public void run() { |
161 |
+ |
try { |
162 |
+ |
lock.writeLock().lockInterruptibly(); |
163 |
+ |
lock.writeLock().unlock(); |
164 |
+ |
lock.writeLock().lockInterruptibly(); |
165 |
+ |
lock.writeLock().unlock(); |
166 |
+ |
} catch(InterruptedException success){} |
167 |
+ |
} |
168 |
+ |
}); |
169 |
+ |
try { |
170 |
+ |
lock.writeLock().lock(); |
171 |
+ |
t.start(); |
172 |
+ |
t.interrupt(); |
173 |
+ |
lock.writeLock().unlock(); |
174 |
+ |
t.join(); |
175 |
+ |
} catch(Exception e){ |
176 |
+ |
unexpectedException(); |
177 |
+ |
} |
178 |
+ |
} |
179 |
|
|
180 |
+ |
/** |
181 |
+ |
* timed write-tryLock is interruptible |
182 |
+ |
*/ |
183 |
+ |
public void testWriteTryLock_Interrupted() { |
184 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
185 |
+ |
lock.writeLock().lock(); |
186 |
+ |
Thread t = new Thread(new Runnable() { |
187 |
+ |
public void run() { |
188 |
+ |
try { |
189 |
+ |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
190 |
+ |
} catch(InterruptedException success){} |
191 |
+ |
} |
192 |
+ |
}); |
193 |
+ |
try { |
194 |
+ |
t.start(); |
195 |
+ |
t.interrupt(); |
196 |
+ |
lock.writeLock().unlock(); |
197 |
+ |
t.join(); |
198 |
+ |
} catch(Exception e){ |
199 |
+ |
unexpectedException(); |
200 |
+ |
} |
201 |
+ |
} |
202 |
+ |
|
203 |
+ |
/** |
204 |
+ |
* read-lockInterruptibly is interruptible |
205 |
+ |
*/ |
206 |
+ |
public void testReadLockInterruptibly_Interrupted() { |
207 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
208 |
+ |
lock.writeLock().lock(); |
209 |
+ |
Thread t = new Thread(new Runnable() { |
210 |
+ |
public void run() { |
211 |
+ |
try { |
212 |
+ |
lock.readLock().lockInterruptibly(); |
213 |
+ |
} catch(InterruptedException success){} |
214 |
+ |
} |
215 |
+ |
}); |
216 |
+ |
try { |
217 |
+ |
t.start(); |
218 |
+ |
t.interrupt(); |
219 |
+ |
lock.writeLock().unlock(); |
220 |
+ |
t.join(); |
221 |
+ |
} catch(Exception e){ |
222 |
+ |
unexpectedException(); |
223 |
+ |
} |
224 |
+ |
} |
225 |
+ |
|
226 |
+ |
/** |
227 |
+ |
* timed read-tryLock is interruptible |
228 |
+ |
*/ |
229 |
+ |
public void testReadTryLock_Interrupted() { |
230 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
231 |
+ |
lock.writeLock().lock(); |
232 |
+ |
Thread t = new Thread(new Runnable() { |
233 |
+ |
public void run() { |
234 |
+ |
try { |
235 |
+ |
lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
236 |
+ |
threadShouldThrow(); |
237 |
+ |
} catch(InterruptedException success){} |
238 |
+ |
} |
239 |
+ |
}); |
240 |
+ |
try { |
241 |
+ |
t.start(); |
242 |
+ |
t.interrupt(); |
243 |
+ |
t.join(); |
244 |
+ |
} catch(Exception e){ |
245 |
+ |
unexpectedException(); |
246 |
+ |
} |
247 |
|
} |
248 |
+ |
|
249 |
|
|
250 |
< |
/* |
251 |
< |
* makes a lock, locks it, tries to aquire the lock in another thread |
46 |
< |
* interrupts that thread and waits for an interrupted Exception to |
47 |
< |
* be thrown. |
250 |
> |
/** |
251 |
> |
* write-tryLock fails if locked |
252 |
|
*/ |
253 |
+ |
public void testWriteTryLockWhenLocked() { |
254 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
255 |
+ |
lock.writeLock().lock(); |
256 |
+ |
Thread t = new Thread(new Runnable() { |
257 |
+ |
public void run() { |
258 |
+ |
threadAssertFalse(lock.writeLock().tryLock()); |
259 |
+ |
} |
260 |
+ |
}); |
261 |
+ |
try { |
262 |
+ |
t.start(); |
263 |
+ |
t.join(); |
264 |
+ |
lock.writeLock().unlock(); |
265 |
+ |
} catch(Exception e){ |
266 |
+ |
unexpectedException(); |
267 |
+ |
} |
268 |
+ |
} |
269 |
|
|
270 |
< |
public void testInterruptedException(){ |
270 |
> |
/** |
271 |
> |
* read-tryLock fails if locked |
272 |
> |
*/ |
273 |
> |
public void testReadTryLockWhenLocked() { |
274 |
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
275 |
|
lock.writeLock().lock(); |
276 |
|
Thread t = new Thread(new Runnable() { |
277 |
< |
public void run(){ |
278 |
< |
try{ |
279 |
< |
lock.writeLock().lockInterruptibly(); |
280 |
< |
fail("should throw"); |
281 |
< |
}catch(InterruptedException sucess){} |
277 |
> |
public void run() { |
278 |
> |
threadAssertFalse(lock.readLock().tryLock()); |
279 |
> |
} |
280 |
> |
}); |
281 |
> |
try { |
282 |
> |
t.start(); |
283 |
> |
t.join(); |
284 |
> |
lock.writeLock().unlock(); |
285 |
> |
} catch(Exception e){ |
286 |
> |
unexpectedException(); |
287 |
> |
} |
288 |
> |
} |
289 |
> |
|
290 |
> |
/** |
291 |
> |
* Multiple threads can hold a read lock when not write-locked |
292 |
> |
*/ |
293 |
> |
public void testMultipleReadLocks() { |
294 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
295 |
> |
lock.readLock().lock(); |
296 |
> |
Thread t = new Thread(new Runnable() { |
297 |
> |
public void run() { |
298 |
> |
threadAssertTrue(lock.readLock().tryLock()); |
299 |
> |
lock.readLock().unlock(); |
300 |
> |
} |
301 |
> |
}); |
302 |
> |
try { |
303 |
> |
t.start(); |
304 |
> |
t.join(); |
305 |
> |
lock.readLock().unlock(); |
306 |
> |
} catch(Exception e){ |
307 |
> |
unexpectedException(); |
308 |
> |
} |
309 |
> |
} |
310 |
> |
|
311 |
> |
/** |
312 |
> |
* A writelock succeeds after reading threads unlock |
313 |
> |
*/ |
314 |
> |
public void testWriteAfterMultipleReadLocks() { |
315 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
316 |
> |
lock.readLock().lock(); |
317 |
> |
Thread t1 = new Thread(new Runnable() { |
318 |
> |
public void run() { |
319 |
> |
lock.readLock().lock(); |
320 |
> |
lock.readLock().unlock(); |
321 |
> |
} |
322 |
> |
}); |
323 |
> |
Thread t2 = new Thread(new Runnable() { |
324 |
> |
public void run() { |
325 |
> |
lock.writeLock().lock(); |
326 |
> |
lock.writeLock().unlock(); |
327 |
|
} |
328 |
|
}); |
329 |
< |
t.start(); |
330 |
< |
t.interrupt(); |
331 |
< |
lock.writeLock().unlock(); |
329 |
> |
|
330 |
> |
try { |
331 |
> |
t1.start(); |
332 |
> |
t2.start(); |
333 |
> |
Thread.sleep(SHORT_DELAY_MS); |
334 |
> |
lock.readLock().unlock(); |
335 |
> |
t1.join(MEDIUM_DELAY_MS); |
336 |
> |
t2.join(MEDIUM_DELAY_MS); |
337 |
> |
assertTrue(!t1.isAlive()); |
338 |
> |
assertTrue(!t2.isAlive()); |
339 |
> |
|
340 |
> |
} catch(Exception e){ |
341 |
> |
unexpectedException(); |
342 |
> |
} |
343 |
|
} |
344 |
|
|
345 |
< |
/* |
346 |
< |
* tests for interrupted exception on a timed wait |
68 |
< |
* |
345 |
> |
/** |
346 |
> |
* Readlocks succeed after a writing thread unlocks |
347 |
|
*/ |
348 |
+ |
public void testReadAfterWriteLock() { |
349 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
350 |
+ |
lock.writeLock().lock(); |
351 |
+ |
Thread t1 = new Thread(new Runnable() { |
352 |
+ |
public void run() { |
353 |
+ |
lock.readLock().lock(); |
354 |
+ |
lock.readLock().unlock(); |
355 |
+ |
} |
356 |
+ |
}); |
357 |
+ |
Thread t2 = new Thread(new Runnable() { |
358 |
+ |
public void run() { |
359 |
+ |
lock.readLock().lock(); |
360 |
+ |
lock.readLock().unlock(); |
361 |
+ |
} |
362 |
+ |
}); |
363 |
+ |
|
364 |
+ |
try { |
365 |
+ |
t1.start(); |
366 |
+ |
t2.start(); |
367 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
368 |
+ |
lock.writeLock().unlock(); |
369 |
+ |
t1.join(MEDIUM_DELAY_MS); |
370 |
+ |
t2.join(MEDIUM_DELAY_MS); |
371 |
+ |
assertTrue(!t1.isAlive()); |
372 |
+ |
assertTrue(!t2.isAlive()); |
373 |
+ |
|
374 |
+ |
} catch(Exception e){ |
375 |
+ |
unexpectedException(); |
376 |
+ |
} |
377 |
+ |
} |
378 |
+ |
|
379 |
+ |
|
380 |
+ |
/** |
381 |
+ |
* Read tryLock succeeds if readlocked but not writelocked |
382 |
+ |
*/ |
383 |
+ |
public void testTryLockWhenReadLocked() { |
384 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
385 |
+ |
lock.readLock().lock(); |
386 |
+ |
Thread t = new Thread(new Runnable() { |
387 |
+ |
public void run() { |
388 |
+ |
threadAssertTrue(lock.readLock().tryLock()); |
389 |
+ |
lock.readLock().unlock(); |
390 |
+ |
} |
391 |
+ |
}); |
392 |
+ |
try { |
393 |
+ |
t.start(); |
394 |
+ |
t.join(); |
395 |
+ |
lock.readLock().unlock(); |
396 |
+ |
} catch(Exception e){ |
397 |
+ |
unexpectedException(); |
398 |
+ |
} |
399 |
+ |
} |
400 |
+ |
|
401 |
|
|
402 |
|
|
403 |
< |
public void testInterruptedException2(){ |
403 |
> |
/** |
404 |
> |
* write tryLock fails when readlocked |
405 |
> |
*/ |
406 |
> |
public void testWriteTryLockWhenReadLocked() { |
407 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
408 |
> |
lock.readLock().lock(); |
409 |
> |
Thread t = new Thread(new Runnable() { |
410 |
> |
public void run() { |
411 |
> |
threadAssertFalse(lock.writeLock().tryLock()); |
412 |
> |
} |
413 |
> |
}); |
414 |
> |
try { |
415 |
> |
t.start(); |
416 |
> |
t.join(); |
417 |
> |
lock.readLock().unlock(); |
418 |
> |
} catch(Exception e){ |
419 |
> |
unexpectedException(); |
420 |
> |
} |
421 |
> |
} |
422 |
> |
|
423 |
> |
|
424 |
> |
|
425 |
> |
/** |
426 |
> |
* write timed tryLock times out if locked |
427 |
> |
*/ |
428 |
> |
public void testWriteTryLock_Timeout() { |
429 |
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
430 |
|
lock.writeLock().lock(); |
431 |
|
Thread t = new Thread(new Runnable() { |
432 |
< |
public void run(){ |
433 |
< |
try{ |
434 |
< |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
435 |
< |
fail("should throw"); |
436 |
< |
}catch(InterruptedException sucess){} |
432 |
> |
public void run() { |
433 |
> |
try { |
434 |
> |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
435 |
> |
} catch (Exception ex) { |
436 |
> |
threadUnexpectedException(); |
437 |
> |
} |
438 |
|
} |
439 |
|
}); |
440 |
< |
t.start(); |
441 |
< |
t.interrupt(); |
440 |
> |
try { |
441 |
> |
t.start(); |
442 |
> |
t.join(); |
443 |
> |
lock.writeLock().unlock(); |
444 |
> |
} catch(Exception e){ |
445 |
> |
unexpectedException(); |
446 |
> |
} |
447 |
> |
} |
448 |
> |
|
449 |
> |
/** |
450 |
> |
* read timed tryLock times out if write-locked |
451 |
> |
*/ |
452 |
> |
public void testReadTryLock_Timeout() { |
453 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
454 |
> |
lock.writeLock().lock(); |
455 |
> |
Thread t = new Thread(new Runnable() { |
456 |
> |
public void run() { |
457 |
> |
try { |
458 |
> |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
459 |
> |
} catch (Exception ex) { |
460 |
> |
threadUnexpectedException(); |
461 |
> |
} |
462 |
> |
} |
463 |
> |
}); |
464 |
> |
try { |
465 |
> |
t.start(); |
466 |
> |
t.join(); |
467 |
> |
lock.writeLock().unlock(); |
468 |
> |
} catch(Exception e){ |
469 |
> |
unexpectedException(); |
470 |
> |
} |
471 |
> |
} |
472 |
> |
|
473 |
> |
|
474 |
> |
/** |
475 |
> |
* write lockInterruptibly succeeds if lock free else is interruptible |
476 |
> |
*/ |
477 |
> |
public void testWriteLockInterruptibly() { |
478 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
479 |
> |
try { |
480 |
> |
lock.writeLock().lockInterruptibly(); |
481 |
> |
} catch(Exception e) { |
482 |
> |
unexpectedException(); |
483 |
> |
} |
484 |
> |
Thread t = new Thread(new Runnable() { |
485 |
> |
public void run() { |
486 |
> |
try { |
487 |
> |
lock.writeLock().lockInterruptibly(); |
488 |
> |
threadShouldThrow(); |
489 |
> |
} |
490 |
> |
catch(InterruptedException success) { |
491 |
> |
} |
492 |
> |
} |
493 |
> |
}); |
494 |
> |
try { |
495 |
> |
t.start(); |
496 |
> |
t.interrupt(); |
497 |
> |
t.join(); |
498 |
> |
lock.writeLock().unlock(); |
499 |
> |
} catch(Exception e){ |
500 |
> |
unexpectedException(); |
501 |
> |
} |
502 |
|
} |
503 |
|
|
504 |
< |
|
504 |
> |
/** |
505 |
> |
* read lockInterruptibly succeeds if lock free else is interruptible |
506 |
> |
*/ |
507 |
> |
public void testReadLockInterruptibly() { |
508 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
509 |
> |
try { |
510 |
> |
lock.writeLock().lockInterruptibly(); |
511 |
> |
} catch(Exception e) { |
512 |
> |
unexpectedException(); |
513 |
> |
} |
514 |
> |
Thread t = new Thread(new Runnable() { |
515 |
> |
public void run() { |
516 |
> |
try { |
517 |
> |
lock.readLock().lockInterruptibly(); |
518 |
> |
threadShouldThrow(); |
519 |
> |
} |
520 |
> |
catch(InterruptedException success) { |
521 |
> |
} |
522 |
> |
} |
523 |
> |
}); |
524 |
> |
try { |
525 |
> |
t.start(); |
526 |
> |
t.interrupt(); |
527 |
> |
t.join(); |
528 |
> |
lock.writeLock().unlock(); |
529 |
> |
} catch(Exception e){ |
530 |
> |
unexpectedException(); |
531 |
> |
} |
532 |
> |
} |
533 |
> |
|
534 |
> |
/** |
535 |
> |
* Calling await without holding lock throws IllegalMonitorStateException |
536 |
> |
*/ |
537 |
> |
public void testAwait_IllegalMonitor() { |
538 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
539 |
> |
final Condition c = lock.writeLock().newCondition(); |
540 |
> |
try { |
541 |
> |
c.await(); |
542 |
> |
shouldThrow(); |
543 |
> |
} |
544 |
> |
catch (IllegalMonitorStateException success) { |
545 |
> |
} |
546 |
> |
catch (Exception ex) { |
547 |
> |
shouldThrow(); |
548 |
> |
} |
549 |
> |
} |
550 |
> |
|
551 |
> |
/** |
552 |
> |
* Calling signal without holding lock throws IllegalMonitorStateException |
553 |
> |
*/ |
554 |
> |
public void testSignal_IllegalMonitor() { |
555 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
556 |
> |
final Condition c = lock.writeLock().newCondition(); |
557 |
> |
try { |
558 |
> |
c.signal(); |
559 |
> |
shouldThrow(); |
560 |
> |
} |
561 |
> |
catch (IllegalMonitorStateException success) { |
562 |
> |
} |
563 |
> |
catch (Exception ex) { |
564 |
> |
unexpectedException(); |
565 |
> |
} |
566 |
> |
} |
567 |
> |
|
568 |
> |
/** |
569 |
> |
* awaitNanos without a signal times out |
570 |
> |
*/ |
571 |
> |
public void testAwaitNanos_Timeout() { |
572 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
573 |
> |
final Condition c = lock.writeLock().newCondition(); |
574 |
> |
try { |
575 |
> |
lock.writeLock().lock(); |
576 |
> |
long t = c.awaitNanos(100); |
577 |
> |
assertTrue(t <= 0); |
578 |
> |
lock.writeLock().unlock(); |
579 |
> |
} |
580 |
> |
catch (Exception ex) { |
581 |
> |
unexpectedException(); |
582 |
> |
} |
583 |
> |
} |
584 |
> |
|
585 |
> |
|
586 |
> |
/** |
587 |
> |
* timed await without a signal times out |
588 |
> |
*/ |
589 |
> |
public void testAwait_Timeout() { |
590 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
591 |
> |
final Condition c = lock.writeLock().newCondition(); |
592 |
> |
try { |
593 |
> |
lock.writeLock().lock(); |
594 |
> |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
595 |
> |
lock.writeLock().unlock(); |
596 |
> |
} |
597 |
> |
catch (Exception ex) { |
598 |
> |
unexpectedException(); |
599 |
> |
} |
600 |
> |
} |
601 |
> |
|
602 |
> |
/** |
603 |
> |
* awaitUntil without a signal times out |
604 |
> |
*/ |
605 |
> |
public void testAwaitUntil_Timeout() { |
606 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
607 |
> |
final Condition c = lock.writeLock().newCondition(); |
608 |
> |
try { |
609 |
> |
lock.writeLock().lock(); |
610 |
> |
java.util.Date d = new java.util.Date(); |
611 |
> |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
612 |
> |
lock.writeLock().unlock(); |
613 |
> |
} |
614 |
> |
catch (Exception ex) { |
615 |
> |
unexpectedException(); |
616 |
> |
} |
617 |
> |
} |
618 |
|
|
619 |
< |
/* |
620 |
< |
* current thread locks interruptibly the thread |
91 |
< |
* another thread tries to aquire the lock and blocks |
92 |
< |
* on the call. interrupt the attempted aquireLock |
93 |
< |
* assert that the first lock() call actually locked the lock |
94 |
< |
* assert that the current thread is the one holding the lock |
619 |
> |
/** |
620 |
> |
* await returns when signalled |
621 |
|
*/ |
622 |
+ |
public void testAwait() { |
623 |
+ |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
624 |
+ |
final Condition c = lock.writeLock().newCondition(); |
625 |
+ |
Thread t = new Thread(new Runnable() { |
626 |
+ |
public void run() { |
627 |
+ |
try { |
628 |
+ |
lock.writeLock().lock(); |
629 |
+ |
c.await(); |
630 |
+ |
lock.writeLock().unlock(); |
631 |
+ |
} |
632 |
+ |
catch(InterruptedException e) { |
633 |
+ |
threadUnexpectedException(); |
634 |
+ |
} |
635 |
+ |
} |
636 |
+ |
}); |
637 |
+ |
|
638 |
+ |
try { |
639 |
+ |
t.start(); |
640 |
+ |
Thread.sleep(SHORT_DELAY_MS); |
641 |
+ |
lock.writeLock().lock(); |
642 |
+ |
c.signal(); |
643 |
+ |
lock.writeLock().unlock(); |
644 |
+ |
t.join(SHORT_DELAY_MS); |
645 |
+ |
assertFalse(t.isAlive()); |
646 |
+ |
} |
647 |
+ |
catch (Exception ex) { |
648 |
+ |
unexpectedException(); |
649 |
+ |
} |
650 |
+ |
} |
651 |
|
|
652 |
< |
public void testLockedInterruptibly() { |
652 |
> |
/** |
653 |
> |
* awaitUninterruptibly doesn't abort on interrupt |
654 |
> |
*/ |
655 |
> |
public void testAwaitUninterruptibly() { |
656 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
657 |
> |
final Condition c = lock.writeLock().newCondition(); |
658 |
> |
Thread t = new Thread(new Runnable() { |
659 |
> |
public void run() { |
660 |
> |
lock.writeLock().lock(); |
661 |
> |
c.awaitUninterruptibly(); |
662 |
> |
lock.writeLock().unlock(); |
663 |
> |
} |
664 |
> |
}); |
665 |
> |
|
666 |
> |
try { |
667 |
> |
t.start(); |
668 |
> |
Thread.sleep(SHORT_DELAY_MS); |
669 |
> |
t.interrupt(); |
670 |
> |
lock.writeLock().lock(); |
671 |
> |
c.signal(); |
672 |
> |
lock.writeLock().unlock(); |
673 |
> |
assert(t.isInterrupted()); |
674 |
> |
t.join(SHORT_DELAY_MS); |
675 |
> |
assertFalse(t.isAlive()); |
676 |
> |
} |
677 |
> |
catch (Exception ex) { |
678 |
> |
unexpectedException(); |
679 |
> |
} |
680 |
> |
} |
681 |
> |
|
682 |
> |
/** |
683 |
> |
* await is interruptible |
684 |
> |
*/ |
685 |
> |
public void testAwait_Interrupt() { |
686 |
|
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
687 |
< |
try {lock.writeLock().lockInterruptibly();} catch(Exception e) {} |
687 |
> |
final Condition c = lock.writeLock().newCondition(); |
688 |
|
Thread t = new Thread(new Runnable() { |
689 |
|
public void run() { |
690 |
|
try { |
691 |
< |
lock.writeLock().lockInterruptibly(); |
692 |
< |
fail("Failed to generate an Interrupted Exception"); |
691 |
> |
lock.writeLock().lock(); |
692 |
> |
c.await(); |
693 |
> |
lock.writeLock().unlock(); |
694 |
> |
threadShouldThrow(); |
695 |
|
} |
696 |
< |
catch(InterruptedException e) {} |
696 |
> |
catch(InterruptedException success) { |
697 |
> |
} |
698 |
|
} |
699 |
|
}); |
700 |
< |
t.start(); |
701 |
< |
t.interrupt(); |
700 |
> |
|
701 |
> |
try { |
702 |
> |
t.start(); |
703 |
> |
Thread.sleep(SHORT_DELAY_MS); |
704 |
> |
t.interrupt(); |
705 |
> |
t.join(SHORT_DELAY_MS); |
706 |
> |
assertFalse(t.isAlive()); |
707 |
> |
} |
708 |
> |
catch (Exception ex) { |
709 |
> |
unexpectedException(); |
710 |
> |
} |
711 |
> |
} |
712 |
> |
|
713 |
> |
/** |
714 |
> |
* awaitNanos is interruptible |
715 |
> |
*/ |
716 |
> |
public void testAwaitNanos_Interrupt() { |
717 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
718 |
> |
final Condition c = lock.writeLock().newCondition(); |
719 |
> |
Thread t = new Thread(new Runnable() { |
720 |
> |
public void run() { |
721 |
> |
try { |
722 |
> |
lock.writeLock().lock(); |
723 |
> |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
724 |
> |
lock.writeLock().unlock(); |
725 |
> |
threadShouldThrow(); |
726 |
> |
} |
727 |
> |
catch(InterruptedException success) { |
728 |
> |
} |
729 |
> |
} |
730 |
> |
}); |
731 |
> |
|
732 |
> |
try { |
733 |
> |
t.start(); |
734 |
> |
Thread.sleep(SHORT_DELAY_MS); |
735 |
> |
t.interrupt(); |
736 |
> |
t.join(SHORT_DELAY_MS); |
737 |
> |
assertFalse(t.isAlive()); |
738 |
> |
} |
739 |
> |
catch (Exception ex) { |
740 |
> |
unexpectedException(); |
741 |
> |
} |
742 |
> |
} |
743 |
> |
|
744 |
> |
/** |
745 |
> |
* awaitUntil is interruptible |
746 |
> |
*/ |
747 |
> |
public void testAwaitUntil_Interrupt() { |
748 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
749 |
> |
final Condition c = lock.writeLock().newCondition(); |
750 |
> |
Thread t = new Thread(new Runnable() { |
751 |
> |
public void run() { |
752 |
> |
try { |
753 |
> |
lock.writeLock().lock(); |
754 |
> |
java.util.Date d = new java.util.Date(); |
755 |
> |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
756 |
> |
lock.writeLock().unlock(); |
757 |
> |
threadShouldThrow(); |
758 |
> |
} |
759 |
> |
catch(InterruptedException success) { |
760 |
> |
} |
761 |
> |
} |
762 |
> |
}); |
763 |
> |
|
764 |
> |
try { |
765 |
> |
t.start(); |
766 |
> |
Thread.sleep(SHORT_DELAY_MS); |
767 |
> |
t.interrupt(); |
768 |
> |
t.join(SHORT_DELAY_MS); |
769 |
> |
assertFalse(t.isAlive()); |
770 |
> |
} |
771 |
> |
catch (Exception ex) { |
772 |
> |
unexpectedException(); |
773 |
> |
} |
774 |
> |
} |
775 |
> |
|
776 |
> |
/** |
777 |
> |
* signalAll wakes up all threads |
778 |
> |
*/ |
779 |
> |
public void testSignalAll() { |
780 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
781 |
> |
final Condition c = lock.writeLock().newCondition(); |
782 |
> |
Thread t1 = new Thread(new Runnable() { |
783 |
> |
public void run() { |
784 |
> |
try { |
785 |
> |
lock.writeLock().lock(); |
786 |
> |
c.await(); |
787 |
> |
lock.writeLock().unlock(); |
788 |
> |
} |
789 |
> |
catch(InterruptedException e) { |
790 |
> |
threadUnexpectedException(); |
791 |
> |
} |
792 |
> |
} |
793 |
> |
}); |
794 |
> |
|
795 |
> |
Thread t2 = new Thread(new Runnable() { |
796 |
> |
public void run() { |
797 |
> |
try { |
798 |
> |
lock.writeLock().lock(); |
799 |
> |
c.await(); |
800 |
> |
lock.writeLock().unlock(); |
801 |
> |
} |
802 |
> |
catch(InterruptedException e) { |
803 |
> |
threadUnexpectedException(); |
804 |
> |
} |
805 |
> |
} |
806 |
> |
}); |
807 |
> |
|
808 |
> |
try { |
809 |
> |
t1.start(); |
810 |
> |
t2.start(); |
811 |
> |
Thread.sleep(SHORT_DELAY_MS); |
812 |
> |
lock.writeLock().lock(); |
813 |
> |
c.signalAll(); |
814 |
> |
lock.writeLock().unlock(); |
815 |
> |
t1.join(SHORT_DELAY_MS); |
816 |
> |
t2.join(SHORT_DELAY_MS); |
817 |
> |
assertFalse(t1.isAlive()); |
818 |
> |
assertFalse(t2.isAlive()); |
819 |
> |
} |
820 |
> |
catch (Exception ex) { |
821 |
> |
unexpectedException(); |
822 |
> |
} |
823 |
> |
} |
824 |
> |
|
825 |
> |
/** |
826 |
> |
* A serialized lock deserializes as unlocked |
827 |
> |
*/ |
828 |
> |
public void testSerialization() { |
829 |
> |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
830 |
> |
l.readLock().lock(); |
831 |
> |
l.readLock().unlock(); |
832 |
> |
|
833 |
> |
try { |
834 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
835 |
> |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
836 |
> |
out.writeObject(l); |
837 |
> |
out.close(); |
838 |
> |
|
839 |
> |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
840 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
841 |
> |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
842 |
> |
r.readLock().lock(); |
843 |
> |
r.readLock().unlock(); |
844 |
> |
} catch(Exception e){ |
845 |
> |
e.printStackTrace(); |
846 |
> |
unexpectedException(); |
847 |
> |
} |
848 |
> |
} |
849 |
> |
|
850 |
> |
/** |
851 |
> |
* hasQueuedThreads reports whether there are waiting threads |
852 |
> |
*/ |
853 |
> |
public void testhasQueuedThreads() { |
854 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
855 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
856 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
857 |
> |
try { |
858 |
> |
assertFalse(lock.hasQueuedThreads()); |
859 |
> |
lock.writeLock().lock(); |
860 |
> |
t1.start(); |
861 |
> |
Thread.sleep(SHORT_DELAY_MS); |
862 |
> |
assertTrue(lock.hasQueuedThreads()); |
863 |
> |
t2.start(); |
864 |
> |
Thread.sleep(SHORT_DELAY_MS); |
865 |
> |
assertTrue(lock.hasQueuedThreads()); |
866 |
> |
t1.interrupt(); |
867 |
> |
Thread.sleep(SHORT_DELAY_MS); |
868 |
> |
assertTrue(lock.hasQueuedThreads()); |
869 |
> |
lock.writeLock().unlock(); |
870 |
> |
Thread.sleep(SHORT_DELAY_MS); |
871 |
> |
assertFalse(lock.hasQueuedThreads()); |
872 |
> |
t1.join(); |
873 |
> |
t2.join(); |
874 |
> |
} catch(Exception e){ |
875 |
> |
unexpectedException(); |
876 |
> |
} |
877 |
> |
} |
878 |
> |
|
879 |
> |
/** |
880 |
> |
* getQueueLength reports number of waiting threads |
881 |
> |
*/ |
882 |
> |
public void testGetQueueLength() { |
883 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
884 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
885 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
886 |
> |
try { |
887 |
> |
assertEquals(0, lock.getQueueLength()); |
888 |
> |
lock.writeLock().lock(); |
889 |
> |
t1.start(); |
890 |
> |
Thread.sleep(SHORT_DELAY_MS); |
891 |
> |
assertEquals(1, lock.getQueueLength()); |
892 |
> |
t2.start(); |
893 |
> |
Thread.sleep(SHORT_DELAY_MS); |
894 |
> |
assertEquals(2, lock.getQueueLength()); |
895 |
> |
t1.interrupt(); |
896 |
> |
Thread.sleep(SHORT_DELAY_MS); |
897 |
> |
assertEquals(1, lock.getQueueLength()); |
898 |
> |
lock.writeLock().unlock(); |
899 |
> |
Thread.sleep(SHORT_DELAY_MS); |
900 |
> |
assertEquals(0, lock.getQueueLength()); |
901 |
> |
t1.join(); |
902 |
> |
t2.join(); |
903 |
> |
} catch(Exception e){ |
904 |
> |
unexpectedException(); |
905 |
> |
} |
906 |
> |
} |
907 |
> |
|
908 |
> |
/** |
909 |
> |
* getQueuedThreads includes waiting threads |
910 |
> |
*/ |
911 |
> |
public void testGetQueuedThreads() { |
912 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
913 |
> |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
914 |
> |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
915 |
> |
try { |
916 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
917 |
> |
lock.writeLock().lock(); |
918 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
919 |
> |
t1.start(); |
920 |
> |
Thread.sleep(SHORT_DELAY_MS); |
921 |
> |
assertTrue(lock.getQueuedThreads().contains(t1)); |
922 |
> |
t2.start(); |
923 |
> |
Thread.sleep(SHORT_DELAY_MS); |
924 |
> |
assertTrue(lock.getQueuedThreads().contains(t1)); |
925 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
926 |
> |
t1.interrupt(); |
927 |
> |
Thread.sleep(SHORT_DELAY_MS); |
928 |
> |
assertFalse(lock.getQueuedThreads().contains(t1)); |
929 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
930 |
> |
lock.writeLock().unlock(); |
931 |
> |
Thread.sleep(SHORT_DELAY_MS); |
932 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
933 |
> |
t1.join(); |
934 |
> |
t2.join(); |
935 |
> |
} catch(Exception e){ |
936 |
> |
unexpectedException(); |
937 |
> |
} |
938 |
> |
} |
939 |
> |
|
940 |
> |
/** |
941 |
> |
* hasWaiters throws NPE if null |
942 |
> |
*/ |
943 |
> |
public void testHasWaitersNPE() { |
944 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
945 |
> |
try { |
946 |
> |
lock.hasWaiters(null); |
947 |
> |
shouldThrow(); |
948 |
> |
} catch (NullPointerException success) { |
949 |
> |
} catch (Exception ex) { |
950 |
> |
unexpectedException(); |
951 |
> |
} |
952 |
> |
} |
953 |
> |
|
954 |
> |
/** |
955 |
> |
* getWaitQueueLength throws NPE if null |
956 |
> |
*/ |
957 |
> |
public void testGetWaitQueueLengthNPE() { |
958 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
959 |
> |
try { |
960 |
> |
lock.getWaitQueueLength(null); |
961 |
> |
shouldThrow(); |
962 |
> |
} catch (NullPointerException success) { |
963 |
> |
} catch (Exception ex) { |
964 |
> |
unexpectedException(); |
965 |
> |
} |
966 |
> |
} |
967 |
> |
|
968 |
> |
|
969 |
> |
/** |
970 |
> |
* getWaitingThreads throws NPE if null |
971 |
> |
*/ |
972 |
> |
public void testGetWaitingThreadsNPE() { |
973 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
974 |
> |
try { |
975 |
> |
lock.getWaitingThreads(null); |
976 |
> |
shouldThrow(); |
977 |
> |
} catch (NullPointerException success) { |
978 |
> |
} catch (Exception ex) { |
979 |
> |
unexpectedException(); |
980 |
> |
} |
981 |
> |
} |
982 |
> |
|
983 |
> |
/** |
984 |
> |
* hasWaiters throws IAE if not owned |
985 |
> |
*/ |
986 |
> |
public void testHasWaitersIAE() { |
987 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
988 |
> |
final Condition c = (lock.writeLock().newCondition()); |
989 |
> |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
990 |
> |
try { |
991 |
> |
lock2.hasWaiters(c); |
992 |
> |
shouldThrow(); |
993 |
> |
} catch (IllegalArgumentException success) { |
994 |
> |
} catch (Exception ex) { |
995 |
> |
unexpectedException(); |
996 |
> |
} |
997 |
> |
} |
998 |
> |
|
999 |
> |
/** |
1000 |
> |
* hasWaiters throws IMSE if not locked |
1001 |
> |
*/ |
1002 |
> |
public void testHasWaitersIMSE() { |
1003 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1004 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1005 |
> |
try { |
1006 |
> |
lock.hasWaiters(c); |
1007 |
> |
shouldThrow(); |
1008 |
> |
} catch (IllegalMonitorStateException success) { |
1009 |
> |
} catch (Exception ex) { |
1010 |
> |
unexpectedException(); |
1011 |
> |
} |
1012 |
> |
} |
1013 |
> |
|
1014 |
> |
|
1015 |
> |
/** |
1016 |
> |
* getWaitQueueLength throws IAE if not owned |
1017 |
> |
*/ |
1018 |
> |
public void testGetWaitQueueLengthIAE() { |
1019 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1020 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1021 |
> |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1022 |
> |
try { |
1023 |
> |
lock2.getWaitQueueLength(c); |
1024 |
> |
shouldThrow(); |
1025 |
> |
} catch (IllegalArgumentException success) { |
1026 |
> |
} catch (Exception ex) { |
1027 |
> |
unexpectedException(); |
1028 |
> |
} |
1029 |
> |
} |
1030 |
> |
|
1031 |
> |
/** |
1032 |
> |
* getWaitQueueLength throws IMSE if not locked |
1033 |
> |
*/ |
1034 |
> |
public void testGetWaitQueueLengthIMSE() { |
1035 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1036 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1037 |
> |
try { |
1038 |
> |
lock.getWaitQueueLength(c); |
1039 |
> |
shouldThrow(); |
1040 |
> |
} catch (IllegalMonitorStateException success) { |
1041 |
> |
} catch (Exception ex) { |
1042 |
> |
unexpectedException(); |
1043 |
> |
} |
1044 |
> |
} |
1045 |
> |
|
1046 |
> |
|
1047 |
> |
/** |
1048 |
> |
* getWaitingThreads throws IAE if not owned |
1049 |
> |
*/ |
1050 |
> |
public void testGetWaitingThreadsIAE() { |
1051 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1052 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1053 |
> |
final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock(); |
1054 |
> |
try { |
1055 |
> |
lock2.getWaitingThreads(c); |
1056 |
> |
shouldThrow(); |
1057 |
> |
} catch (IllegalArgumentException success) { |
1058 |
> |
} catch (Exception ex) { |
1059 |
> |
unexpectedException(); |
1060 |
> |
} |
1061 |
> |
} |
1062 |
> |
|
1063 |
> |
/** |
1064 |
> |
* getWaitingThreads throws IMSE if not locked |
1065 |
> |
*/ |
1066 |
> |
public void testGetWaitingThreadsIMSE() { |
1067 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1068 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1069 |
> |
try { |
1070 |
> |
lock.getWaitingThreads(c); |
1071 |
> |
shouldThrow(); |
1072 |
> |
} catch (IllegalMonitorStateException success) { |
1073 |
> |
} catch (Exception ex) { |
1074 |
> |
unexpectedException(); |
1075 |
> |
} |
1076 |
> |
} |
1077 |
> |
|
1078 |
> |
|
1079 |
> |
/** |
1080 |
> |
* hasWaiters returns true when a thread is waiting, else false |
1081 |
> |
*/ |
1082 |
> |
public void testHasWaiters() { |
1083 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1084 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1085 |
> |
Thread t = new Thread(new Runnable() { |
1086 |
> |
public void run() { |
1087 |
> |
try { |
1088 |
> |
lock.writeLock().lock(); |
1089 |
> |
threadAssertFalse(lock.hasWaiters(c)); |
1090 |
> |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1091 |
> |
c.await(); |
1092 |
> |
lock.writeLock().unlock(); |
1093 |
> |
} |
1094 |
> |
catch(InterruptedException e) { |
1095 |
> |
threadUnexpectedException(); |
1096 |
> |
} |
1097 |
> |
} |
1098 |
> |
}); |
1099 |
> |
|
1100 |
> |
try { |
1101 |
> |
t.start(); |
1102 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1103 |
> |
lock.writeLock().lock(); |
1104 |
> |
assertTrue(lock.hasWaiters(c)); |
1105 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
1106 |
> |
c.signal(); |
1107 |
> |
lock.writeLock().unlock(); |
1108 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1109 |
> |
lock.writeLock().lock(); |
1110 |
> |
assertFalse(lock.hasWaiters(c)); |
1111 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1112 |
> |
lock.writeLock().unlock(); |
1113 |
> |
t.join(SHORT_DELAY_MS); |
1114 |
> |
assertFalse(t.isAlive()); |
1115 |
> |
} |
1116 |
> |
catch (Exception ex) { |
1117 |
> |
unexpectedException(); |
1118 |
> |
} |
1119 |
> |
} |
1120 |
> |
|
1121 |
> |
/** |
1122 |
> |
* getWaitQueueLength returns number of waiting threads |
1123 |
> |
*/ |
1124 |
> |
public void testGetWaitQueueLength() { |
1125 |
> |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1126 |
> |
final Condition c = (lock.writeLock().newCondition()); |
1127 |
> |
Thread t = new Thread(new Runnable() { |
1128 |
> |
public void run() { |
1129 |
> |
try { |
1130 |
> |
lock.writeLock().lock(); |
1131 |
> |
threadAssertFalse(lock.hasWaiters(c)); |
1132 |
> |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1133 |
> |
c.await(); |
1134 |
> |
lock.writeLock().unlock(); |
1135 |
> |
} |
1136 |
> |
catch(InterruptedException e) { |
1137 |
> |
threadUnexpectedException(); |
1138 |
> |
} |
1139 |
> |
} |
1140 |
> |
}); |
1141 |
> |
|
1142 |
> |
try { |
1143 |
> |
t.start(); |
1144 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1145 |
> |
lock.writeLock().lock(); |
1146 |
> |
assertTrue(lock.hasWaiters(c)); |
1147 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
1148 |
> |
c.signal(); |
1149 |
> |
lock.writeLock().unlock(); |
1150 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1151 |
> |
lock.writeLock().lock(); |
1152 |
> |
assertFalse(lock.hasWaiters(c)); |
1153 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
1154 |
> |
lock.writeLock().unlock(); |
1155 |
> |
t.join(SHORT_DELAY_MS); |
1156 |
> |
assertFalse(t.isAlive()); |
1157 |
> |
} |
1158 |
> |
catch (Exception ex) { |
1159 |
> |
unexpectedException(); |
1160 |
> |
} |
1161 |
> |
} |
1162 |
> |
|
1163 |
> |
|
1164 |
> |
/** |
1165 |
> |
* getWaitingThreads returns only and all waiting threads |
1166 |
> |
*/ |
1167 |
> |
public void testGetWaitingThreads() { |
1168 |
> |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1169 |
> |
final Condition c = lock.writeLock().newCondition(); |
1170 |
> |
Thread t1 = new Thread(new Runnable() { |
1171 |
> |
public void run() { |
1172 |
> |
try { |
1173 |
> |
lock.writeLock().lock(); |
1174 |
> |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
1175 |
> |
c.await(); |
1176 |
> |
lock.writeLock().unlock(); |
1177 |
> |
} |
1178 |
> |
catch(InterruptedException e) { |
1179 |
> |
threadUnexpectedException(); |
1180 |
> |
} |
1181 |
> |
} |
1182 |
> |
}); |
1183 |
> |
|
1184 |
> |
Thread t2 = new Thread(new Runnable() { |
1185 |
> |
public void run() { |
1186 |
> |
try { |
1187 |
> |
lock.writeLock().lock(); |
1188 |
> |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
1189 |
> |
c.await(); |
1190 |
> |
lock.writeLock().unlock(); |
1191 |
> |
} |
1192 |
> |
catch(InterruptedException e) { |
1193 |
> |
threadUnexpectedException(); |
1194 |
> |
} |
1195 |
> |
} |
1196 |
> |
}); |
1197 |
> |
|
1198 |
> |
try { |
1199 |
> |
lock.writeLock().lock(); |
1200 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1201 |
> |
lock.writeLock().unlock(); |
1202 |
> |
t1.start(); |
1203 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1204 |
> |
t2.start(); |
1205 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1206 |
> |
lock.writeLock().lock(); |
1207 |
> |
assertTrue(lock.hasWaiters(c)); |
1208 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1209 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1210 |
> |
c.signalAll(); |
1211 |
> |
lock.writeLock().unlock(); |
1212 |
> |
Thread.sleep(SHORT_DELAY_MS); |
1213 |
> |
lock.writeLock().lock(); |
1214 |
> |
assertFalse(lock.hasWaiters(c)); |
1215 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1216 |
> |
lock.writeLock().unlock(); |
1217 |
> |
t1.join(SHORT_DELAY_MS); |
1218 |
> |
t2.join(SHORT_DELAY_MS); |
1219 |
> |
assertFalse(t1.isAlive()); |
1220 |
> |
assertFalse(t2.isAlive()); |
1221 |
> |
} |
1222 |
> |
catch (Exception ex) { |
1223 |
> |
unexpectedException(); |
1224 |
> |
} |
1225 |
> |
} |
1226 |
> |
|
1227 |
> |
/** |
1228 |
> |
* toString indicates current lock state |
1229 |
> |
*/ |
1230 |
> |
public void testToString() { |
1231 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1232 |
> |
String us = lock.toString(); |
1233 |
> |
assertTrue(us.indexOf("Write locks = 0") >= 0); |
1234 |
> |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1235 |
> |
lock.writeLock().lock(); |
1236 |
> |
String ws = lock.toString(); |
1237 |
> |
assertTrue(ws.indexOf("Write locks = 1") >= 0); |
1238 |
> |
assertTrue(ws.indexOf("Read locks = 0") >= 0); |
1239 |
> |
lock.writeLock().unlock(); |
1240 |
> |
lock.readLock().lock(); |
1241 |
> |
lock.readLock().lock(); |
1242 |
> |
String rs = lock.toString(); |
1243 |
> |
assertTrue(rs.indexOf("Write locks = 0") >= 0); |
1244 |
> |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1245 |
> |
} |
1246 |
> |
|
1247 |
> |
/** |
1248 |
> |
* readLock.toString indicates current lock state |
1249 |
> |
*/ |
1250 |
> |
public void testReadLockToString() { |
1251 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1252 |
> |
String us = lock.readLock().toString(); |
1253 |
> |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1254 |
> |
lock.readLock().lock(); |
1255 |
> |
lock.readLock().lock(); |
1256 |
> |
String rs = lock.readLock().toString(); |
1257 |
> |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1258 |
> |
} |
1259 |
> |
|
1260 |
> |
/** |
1261 |
> |
* writeLock.toString indicates current lock state |
1262 |
> |
*/ |
1263 |
> |
public void testWriteLockToString() { |
1264 |
> |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1265 |
> |
String us = lock.writeLock().toString(); |
1266 |
> |
assertTrue(us.indexOf("Unlocked") >= 0); |
1267 |
> |
lock.writeLock().lock(); |
1268 |
> |
String ls = lock.writeLock().toString(); |
1269 |
> |
assertTrue(ls.indexOf("Locked") >= 0); |
1270 |
|
} |
112 |
– |
|
1271 |
|
|
1272 |
|
} |