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1.1 |
/* |
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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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*/ |
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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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dl |
1.3 |
import java.io.*; |
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dl |
1.1 |
|
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dl |
1.4 |
public class ReentrantLockTest extends JSR166TestCase { |
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dl |
1.1 |
static int HOLD_COUNT_TEST_LIMIT = 20; |
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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(ReentrantLockTest.class); |
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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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public void testIllegalMonitorStateException(){ |
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ReentrantLock rl = new ReentrantLock(); |
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try{ |
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rl.unlock(); |
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fail("Should of thown Illegal Monitor State Exception"); |
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dl |
1.3 |
} catch(IllegalMonitorStateException success){} |
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dl |
1.1 |
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} |
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/* |
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* makes a lock, locks it, tries to aquire the lock in another thread |
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* interrupts that thread and waits for an interrupted Exception to |
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* be thrown. |
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*/ |
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public void testInterruptedException(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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lock.lockInterruptibly(); |
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dl |
1.4 |
threadFail("should throw"); |
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dl |
1.3 |
} catch(InterruptedException success){} |
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dl |
1.1 |
} |
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}); |
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dl |
1.4 |
try { |
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t.start(); |
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t.interrupt(); |
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lock.unlock(); |
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t.join(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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dl |
1.1 |
} |
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/* |
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* tests for interrupted exception on a timed wait |
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* |
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*/ |
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public void testInterruptedException2(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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dl |
1.4 |
lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS); |
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threadFail("should throw"); |
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dl |
1.3 |
} catch(InterruptedException success){} |
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dl |
1.1 |
} |
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}); |
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dl |
1.4 |
try { |
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t.start(); |
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t.interrupt(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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dl |
1.1 |
} |
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dl |
1.3 |
|
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public void testTryLockWhenLocked() { |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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dl |
1.4 |
threadAssertFalse(lock.tryLock()); |
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dl |
1.3 |
} |
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}); |
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try { |
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t.start(); |
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t.join(); |
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lock.unlock(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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public void testTryLock_Timeout(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try { |
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dl |
1.4 |
threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
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dl |
1.3 |
} catch (Exception ex) { |
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dl |
1.4 |
threadFail("unexpected exception"); |
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dl |
1.3 |
} |
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} |
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}); |
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try { |
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t.start(); |
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t.join(); |
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lock.unlock(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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dl |
1.1 |
|
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public void testGetHoldCount() { |
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ReentrantLock lock = new ReentrantLock(); |
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for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) { |
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lock.lock(); |
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assertEquals(i,lock.getHoldCount()); |
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} |
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for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) { |
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lock.unlock(); |
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assertEquals(i-1,lock.getHoldCount()); |
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} |
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} |
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public void testIsLocked() { |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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assertTrue(lock.isLocked()); |
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lock.unlock(); |
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assertFalse(lock.isLocked()); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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lock.lock(); |
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try { |
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dl |
1.4 |
Thread.sleep(SMALL_DELAY_MS); |
156 |
dl |
1.1 |
} |
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dl |
1.4 |
catch(Exception e) { |
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threadFail("unexpected exception"); |
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} |
160 |
dl |
1.1 |
lock.unlock(); |
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} |
162 |
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}); |
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try{ |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.isLocked()); |
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t.join(); |
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assertFalse(lock.isLocked()); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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174 |
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dl |
1.3 |
public void testLockInterruptibly() { |
176 |
dl |
1.1 |
final ReentrantLock lock = new ReentrantLock(); |
177 |
dl |
1.3 |
try { |
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lock.lockInterruptibly(); |
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} catch(Exception e) { |
180 |
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fail("unexpected exception"); |
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} |
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dl |
1.1 |
Thread t = new Thread(new Runnable() { |
183 |
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public void run() { |
184 |
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try { |
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lock.lockInterruptibly(); |
186 |
dl |
1.4 |
threadFail("should throw"); |
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dl |
1.1 |
} |
188 |
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catch(InterruptedException e) {} |
189 |
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} |
190 |
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}); |
191 |
dl |
1.3 |
try { |
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t.start(); |
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t.interrupt(); |
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assertTrue(lock.isLocked()); |
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assertTrue(lock.isHeldByCurrentThread()); |
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t.join(); |
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} catch(Exception e){ |
198 |
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fail("unexpected exception"); |
199 |
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} |
200 |
dl |
1.1 |
} |
201 |
dl |
1.2 |
|
202 |
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public void testAwait_IllegalMonitor() { |
203 |
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final ReentrantLock lock = new ReentrantLock(); |
204 |
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final Condition c = lock.newCondition(); |
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try { |
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c.await(); |
207 |
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fail("should throw"); |
208 |
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} |
209 |
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catch (IllegalMonitorStateException success) { |
210 |
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} |
211 |
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catch (Exception ex) { |
212 |
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fail("should throw IMSE"); |
213 |
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} |
214 |
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} |
215 |
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216 |
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public void testSignal_IllegalMonitor() { |
217 |
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final ReentrantLock lock = new ReentrantLock(); |
218 |
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final Condition c = lock.newCondition(); |
219 |
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try { |
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c.signal(); |
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fail("should throw"); |
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} |
223 |
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catch (IllegalMonitorStateException success) { |
224 |
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} |
225 |
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catch (Exception ex) { |
226 |
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fail("should throw IMSE"); |
227 |
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} |
228 |
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} |
229 |
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public void testAwaitNanos_Timeout() { |
231 |
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final ReentrantLock lock = new ReentrantLock(); |
232 |
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final Condition c = lock.newCondition(); |
233 |
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try { |
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lock.lock(); |
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long t = c.awaitNanos(100); |
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assertTrue(t <= 0); |
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lock.unlock(); |
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} |
239 |
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catch (Exception ex) { |
240 |
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fail("unexpected exception"); |
241 |
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} |
242 |
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} |
243 |
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244 |
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public void testAwait_Timeout() { |
245 |
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final ReentrantLock lock = new ReentrantLock(); |
246 |
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final Condition c = lock.newCondition(); |
247 |
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try { |
248 |
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lock.lock(); |
249 |
dl |
1.4 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
250 |
dl |
1.2 |
lock.unlock(); |
251 |
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} |
252 |
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catch (Exception ex) { |
253 |
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fail("unexpected exception"); |
254 |
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} |
255 |
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} |
256 |
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257 |
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public void testAwaitUntil_Timeout() { |
258 |
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final ReentrantLock lock = new ReentrantLock(); |
259 |
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final Condition c = lock.newCondition(); |
260 |
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try { |
261 |
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lock.lock(); |
262 |
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java.util.Date d = new java.util.Date(); |
263 |
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assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
264 |
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lock.unlock(); |
265 |
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} |
266 |
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catch (Exception ex) { |
267 |
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fail("unexpected exception"); |
268 |
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} |
269 |
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} |
270 |
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271 |
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public void testAwait() { |
272 |
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final ReentrantLock lock = new ReentrantLock(); |
273 |
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final Condition c = lock.newCondition(); |
274 |
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Thread t = new Thread(new Runnable() { |
275 |
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public void run() { |
276 |
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try { |
277 |
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lock.lock(); |
278 |
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c.await(); |
279 |
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lock.unlock(); |
280 |
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} |
281 |
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catch(InterruptedException e) { |
282 |
dl |
1.4 |
threadFail("unexpected exception"); |
283 |
dl |
1.2 |
} |
284 |
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} |
285 |
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}); |
286 |
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287 |
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try { |
288 |
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t.start(); |
289 |
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Thread.sleep(SHORT_DELAY_MS); |
290 |
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lock.lock(); |
291 |
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c.signal(); |
292 |
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lock.unlock(); |
293 |
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t.join(SHORT_DELAY_MS); |
294 |
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assertFalse(t.isAlive()); |
295 |
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} |
296 |
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catch (Exception ex) { |
297 |
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fail("unexpected exception"); |
298 |
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} |
299 |
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} |
300 |
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301 |
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public void testAwaitUninterruptibly() { |
302 |
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final ReentrantLock lock = new ReentrantLock(); |
303 |
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final Condition c = lock.newCondition(); |
304 |
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Thread t = new Thread(new Runnable() { |
305 |
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public void run() { |
306 |
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lock.lock(); |
307 |
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c.awaitUninterruptibly(); |
308 |
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lock.unlock(); |
309 |
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} |
310 |
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}); |
311 |
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312 |
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try { |
313 |
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t.start(); |
314 |
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Thread.sleep(SHORT_DELAY_MS); |
315 |
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t.interrupt(); |
316 |
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lock.lock(); |
317 |
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c.signal(); |
318 |
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lock.unlock(); |
319 |
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t.join(SHORT_DELAY_MS); |
320 |
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assertFalse(t.isAlive()); |
321 |
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} |
322 |
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catch (Exception ex) { |
323 |
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fail("unexpected exception"); |
324 |
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} |
325 |
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} |
326 |
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327 |
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public void testAwait_Interrupt() { |
328 |
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final ReentrantLock lock = new ReentrantLock(); |
329 |
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final Condition c = lock.newCondition(); |
330 |
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Thread t = new Thread(new Runnable() { |
331 |
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public void run() { |
332 |
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try { |
333 |
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lock.lock(); |
334 |
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c.await(); |
335 |
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lock.unlock(); |
336 |
dl |
1.4 |
threadFail("should throw"); |
337 |
dl |
1.2 |
} |
338 |
|
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catch(InterruptedException success) { |
339 |
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} |
340 |
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} |
341 |
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}); |
342 |
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|
343 |
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try { |
344 |
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t.start(); |
345 |
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Thread.sleep(SHORT_DELAY_MS); |
346 |
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t.interrupt(); |
347 |
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t.join(SHORT_DELAY_MS); |
348 |
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assertFalse(t.isAlive()); |
349 |
|
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} |
350 |
|
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catch (Exception ex) { |
351 |
|
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fail("unexpected exception"); |
352 |
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} |
353 |
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} |
354 |
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|
355 |
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public void testAwaitNanos_Interrupt() { |
356 |
|
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final ReentrantLock lock = new ReentrantLock(); |
357 |
|
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final Condition c = lock.newCondition(); |
358 |
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Thread t = new Thread(new Runnable() { |
359 |
|
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public void run() { |
360 |
|
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try { |
361 |
|
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lock.lock(); |
362 |
|
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c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
363 |
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lock.unlock(); |
364 |
dl |
1.4 |
threadFail("should throw"); |
365 |
dl |
1.2 |
} |
366 |
|
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catch(InterruptedException success) { |
367 |
|
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} |
368 |
|
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} |
369 |
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}); |
370 |
|
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|
371 |
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try { |
372 |
|
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t.start(); |
373 |
|
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Thread.sleep(SHORT_DELAY_MS); |
374 |
|
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t.interrupt(); |
375 |
|
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t.join(SHORT_DELAY_MS); |
376 |
|
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assertFalse(t.isAlive()); |
377 |
|
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} |
378 |
|
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catch (Exception ex) { |
379 |
|
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fail("unexpected exception"); |
380 |
|
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} |
381 |
|
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} |
382 |
|
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|
383 |
|
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public void testAwaitUntil_Interrupt() { |
384 |
|
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final ReentrantLock lock = new ReentrantLock(); |
385 |
|
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final Condition c = lock.newCondition(); |
386 |
|
|
Thread t = new Thread(new Runnable() { |
387 |
|
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public void run() { |
388 |
|
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try { |
389 |
|
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lock.lock(); |
390 |
|
|
java.util.Date d = new java.util.Date(); |
391 |
|
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c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
392 |
|
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lock.unlock(); |
393 |
dl |
1.4 |
threadFail("should throw"); |
394 |
dl |
1.2 |
} |
395 |
|
|
catch(InterruptedException success) { |
396 |
|
|
} |
397 |
|
|
} |
398 |
|
|
}); |
399 |
|
|
|
400 |
|
|
try { |
401 |
|
|
t.start(); |
402 |
|
|
Thread.sleep(SHORT_DELAY_MS); |
403 |
|
|
t.interrupt(); |
404 |
|
|
t.join(SHORT_DELAY_MS); |
405 |
|
|
assertFalse(t.isAlive()); |
406 |
|
|
} |
407 |
|
|
catch (Exception ex) { |
408 |
|
|
fail("unexpected exception"); |
409 |
|
|
} |
410 |
|
|
} |
411 |
|
|
|
412 |
|
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public void testSignalAll() { |
413 |
|
|
final ReentrantLock lock = new ReentrantLock(); |
414 |
|
|
final Condition c = lock.newCondition(); |
415 |
|
|
Thread t1 = new Thread(new Runnable() { |
416 |
|
|
public void run() { |
417 |
|
|
try { |
418 |
|
|
lock.lock(); |
419 |
|
|
c.await(); |
420 |
|
|
lock.unlock(); |
421 |
|
|
} |
422 |
|
|
catch(InterruptedException e) { |
423 |
dl |
1.4 |
threadFail("unexpected exception"); |
424 |
dl |
1.2 |
} |
425 |
|
|
} |
426 |
|
|
}); |
427 |
|
|
|
428 |
|
|
Thread t2 = new Thread(new Runnable() { |
429 |
|
|
public void run() { |
430 |
|
|
try { |
431 |
|
|
lock.lock(); |
432 |
|
|
c.await(); |
433 |
|
|
lock.unlock(); |
434 |
|
|
} |
435 |
|
|
catch(InterruptedException e) { |
436 |
dl |
1.4 |
threadFail("unexpected exception"); |
437 |
dl |
1.2 |
} |
438 |
|
|
} |
439 |
|
|
}); |
440 |
|
|
|
441 |
|
|
try { |
442 |
|
|
t1.start(); |
443 |
|
|
t2.start(); |
444 |
|
|
Thread.sleep(SHORT_DELAY_MS); |
445 |
|
|
lock.lock(); |
446 |
|
|
c.signalAll(); |
447 |
|
|
lock.unlock(); |
448 |
|
|
t1.join(SHORT_DELAY_MS); |
449 |
|
|
t2.join(SHORT_DELAY_MS); |
450 |
|
|
assertFalse(t1.isAlive()); |
451 |
|
|
assertFalse(t2.isAlive()); |
452 |
|
|
} |
453 |
|
|
catch (Exception ex) { |
454 |
dl |
1.3 |
fail("unexpected exception"); |
455 |
|
|
} |
456 |
|
|
} |
457 |
|
|
|
458 |
|
|
public void testSerialization() { |
459 |
|
|
ReentrantLock l = new ReentrantLock(); |
460 |
|
|
l.lock(); |
461 |
|
|
l.unlock(); |
462 |
|
|
|
463 |
|
|
try { |
464 |
|
|
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
465 |
|
|
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
466 |
|
|
out.writeObject(l); |
467 |
|
|
out.close(); |
468 |
|
|
|
469 |
|
|
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
470 |
|
|
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
471 |
|
|
ReentrantLock r = (ReentrantLock) in.readObject(); |
472 |
|
|
r.lock(); |
473 |
|
|
r.unlock(); |
474 |
|
|
} catch(Exception e){ |
475 |
|
|
e.printStackTrace(); |
476 |
dl |
1.2 |
fail("unexpected exception"); |
477 |
|
|
} |
478 |
|
|
} |
479 |
dl |
1.1 |
|
480 |
|
|
} |