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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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*/ |
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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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|
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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 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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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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|
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public void testIllegalMonitorStateException(){ |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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try{ |
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rl.writeLock().unlock(); |
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fail("Should of thown Illegal Monitor State Exception"); |
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|
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}catch(IllegalMonitorStateException success){} |
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} |
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|
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|
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|
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public void testInterruptedException(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.writeLock().lockInterruptibly(); |
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fail("should throw"); |
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}catch(InterruptedException success){} |
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} |
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}); |
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try { |
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t.start(); |
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t.interrupt(); |
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lock.writeLock().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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} |
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|
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public void testInterruptedException2(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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}catch(InterruptedException success){} |
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} |
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}); |
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try { |
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t.start(); |
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t.interrupt(); |
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lock.writeLock().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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} |
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|
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public void testInterruptedException3(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.readLock().lockInterruptibly(); |
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fail("should throw"); |
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}catch(InterruptedException success){} |
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} |
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}); |
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try { |
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t.start(); |
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t.interrupt(); |
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lock.writeLock().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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} |
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|
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public void testInterruptedException4(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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}catch(InterruptedException success){} |
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} |
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}); |
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try { |
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t.start(); |
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t.interrupt(); |
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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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} |
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|
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|
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public void testTryLockWhenLocked() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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assertFalse(lock.writeLock().tryLock()); |
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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.writeLock().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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|
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public void testTryLockWhenLocked2() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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assertFalse(lock.readLock().tryLock()); |
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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.writeLock().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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|
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public void testMultipleReadLocks() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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assertTrue(lock.readLock().tryLock()); |
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lock.readLock().unlock(); |
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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.readLock().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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|
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public void testWriteAfterMultipleReadLocks() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t1 = new Thread(new Runnable() { |
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public void run(){ |
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lock.readLock().lock(); |
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lock.readLock().unlock(); |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run(){ |
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lock.writeLock().lock(); |
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lock.writeLock().unlock(); |
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} |
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}); |
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|
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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lock.readLock().unlock(); |
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t1.join(MEDIUM_DELAY_MS); |
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t2.join(MEDIUM_DELAY_MS); |
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assertTrue(!t1.isAlive()); |
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assertTrue(!t2.isAlive()); |
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|
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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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|
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public void testReadAfterWriteLock() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t1 = new Thread(new Runnable() { |
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public void run(){ |
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lock.readLock().lock(); |
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lock.readLock().unlock(); |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run(){ |
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lock.readLock().lock(); |
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lock.readLock().unlock(); |
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} |
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}); |
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|
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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lock.writeLock().unlock(); |
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t1.join(MEDIUM_DELAY_MS); |
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t2.join(MEDIUM_DELAY_MS); |
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assertTrue(!t1.isAlive()); |
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assertTrue(!t2.isAlive()); |
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|
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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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|
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|
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public void testTryLockWhenReadLocked() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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assertTrue(lock.readLock().tryLock()); |
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lock.readLock().unlock(); |
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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.readLock().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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|
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|
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|
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public void testWriteTryLockWhenReadLocked() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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assertFalse(lock.writeLock().tryLock()); |
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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.readLock().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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|
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|
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|
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public void testTryLock_Timeout(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
288 |
try { |
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assertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
290 |
} catch (Exception ex) { |
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fail("unexpected exception"); |
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} |
293 |
} |
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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.writeLock().unlock(); |
299 |
} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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public void testTryLock_Timeout2(){ |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
307 |
Thread t = new Thread(new Runnable() { |
308 |
public void run(){ |
309 |
try { |
310 |
assertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
311 |
} catch (Exception ex) { |
312 |
fail("unexpected exception"); |
313 |
} |
314 |
} |
315 |
}); |
316 |
try { |
317 |
t.start(); |
318 |
t.join(); |
319 |
lock.writeLock().unlock(); |
320 |
} catch(Exception e){ |
321 |
fail("unexpected exception"); |
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} |
323 |
} |
324 |
|
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|
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public void testLockInterruptibly() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
328 |
try { |
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lock.writeLock().lockInterruptibly(); |
330 |
} catch(Exception e) { |
331 |
fail("unexpected exception"); |
332 |
} |
333 |
Thread t = new Thread(new Runnable() { |
334 |
public void run() { |
335 |
try { |
336 |
lock.writeLock().lockInterruptibly(); |
337 |
fail("should throw"); |
338 |
} |
339 |
catch(InterruptedException success) { |
340 |
} |
341 |
} |
342 |
}); |
343 |
try { |
344 |
t.start(); |
345 |
t.interrupt(); |
346 |
t.join(); |
347 |
lock.writeLock().unlock(); |
348 |
} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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public void testLockInterruptibly2() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
355 |
try { |
356 |
lock.writeLock().lockInterruptibly(); |
357 |
} catch(Exception e) { |
358 |
fail("unexpected exception"); |
359 |
} |
360 |
Thread t = new Thread(new Runnable() { |
361 |
public void run() { |
362 |
try { |
363 |
lock.readLock().lockInterruptibly(); |
364 |
fail("should throw"); |
365 |
} |
366 |
catch(InterruptedException success) { |
367 |
} |
368 |
} |
369 |
}); |
370 |
try { |
371 |
t.start(); |
372 |
t.interrupt(); |
373 |
t.join(); |
374 |
lock.writeLock().unlock(); |
375 |
} catch(Exception e){ |
376 |
fail("unexpected exception"); |
377 |
} |
378 |
} |
379 |
|
380 |
public void testAwait_IllegalMonitor() { |
381 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
382 |
final Condition c = lock.writeLock().newCondition(); |
383 |
try { |
384 |
c.await(); |
385 |
fail("should throw"); |
386 |
} |
387 |
catch (IllegalMonitorStateException success) { |
388 |
} |
389 |
catch (Exception ex) { |
390 |
fail("should throw IMSE"); |
391 |
} |
392 |
} |
393 |
|
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public void testSignal_IllegalMonitor() { |
395 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
396 |
final Condition c = lock.writeLock().newCondition(); |
397 |
try { |
398 |
c.signal(); |
399 |
fail("should throw"); |
400 |
} |
401 |
catch (IllegalMonitorStateException success) { |
402 |
} |
403 |
catch (Exception ex) { |
404 |
fail("should throw IMSE"); |
405 |
} |
406 |
} |
407 |
|
408 |
public void testAwaitNanos_Timeout() { |
409 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
410 |
final Condition c = lock.writeLock().newCondition(); |
411 |
try { |
412 |
lock.writeLock().lock(); |
413 |
long t = c.awaitNanos(100); |
414 |
assertTrue(t <= 0); |
415 |
lock.writeLock().unlock(); |
416 |
} |
417 |
catch (Exception ex) { |
418 |
fail("unexpected exception"); |
419 |
} |
420 |
} |
421 |
|
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public void testAwait_Timeout() { |
423 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
424 |
final Condition c = lock.writeLock().newCondition(); |
425 |
try { |
426 |
lock.writeLock().lock(); |
427 |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
428 |
lock.writeLock().unlock(); |
429 |
} |
430 |
catch (Exception ex) { |
431 |
fail("unexpected exception"); |
432 |
} |
433 |
} |
434 |
|
435 |
public void testAwaitUntil_Timeout() { |
436 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
437 |
final Condition c = lock.writeLock().newCondition(); |
438 |
try { |
439 |
lock.writeLock().lock(); |
440 |
java.util.Date d = new java.util.Date(); |
441 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
442 |
lock.writeLock().unlock(); |
443 |
} |
444 |
catch (Exception ex) { |
445 |
fail("unexpected exception"); |
446 |
} |
447 |
} |
448 |
|
449 |
public void testAwait() { |
450 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
451 |
final Condition c = lock.writeLock().newCondition(); |
452 |
Thread t = new Thread(new Runnable() { |
453 |
public void run() { |
454 |
try { |
455 |
lock.writeLock().lock(); |
456 |
c.await(); |
457 |
lock.writeLock().unlock(); |
458 |
} |
459 |
catch(InterruptedException e) { |
460 |
fail("unexpected exception"); |
461 |
} |
462 |
} |
463 |
}); |
464 |
|
465 |
try { |
466 |
t.start(); |
467 |
Thread.sleep(SHORT_DELAY_MS); |
468 |
lock.writeLock().lock(); |
469 |
c.signal(); |
470 |
lock.writeLock().unlock(); |
471 |
t.join(SHORT_DELAY_MS); |
472 |
assertFalse(t.isAlive()); |
473 |
} |
474 |
catch (Exception ex) { |
475 |
fail("unexpected exception"); |
476 |
} |
477 |
} |
478 |
|
479 |
public void testAwaitUninterruptibly() { |
480 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
481 |
final Condition c = lock.writeLock().newCondition(); |
482 |
Thread t = new Thread(new Runnable() { |
483 |
public void run() { |
484 |
lock.writeLock().lock(); |
485 |
c.awaitUninterruptibly(); |
486 |
lock.writeLock().unlock(); |
487 |
} |
488 |
}); |
489 |
|
490 |
try { |
491 |
t.start(); |
492 |
Thread.sleep(SHORT_DELAY_MS); |
493 |
t.interrupt(); |
494 |
lock.writeLock().lock(); |
495 |
c.signal(); |
496 |
lock.writeLock().unlock(); |
497 |
t.join(SHORT_DELAY_MS); |
498 |
assertFalse(t.isAlive()); |
499 |
} |
500 |
catch (Exception ex) { |
501 |
fail("unexpected exception"); |
502 |
} |
503 |
} |
504 |
|
505 |
public void testAwait_Interrupt() { |
506 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
507 |
final Condition c = lock.writeLock().newCondition(); |
508 |
Thread t = new Thread(new Runnable() { |
509 |
public void run() { |
510 |
try { |
511 |
lock.writeLock().lock(); |
512 |
c.await(); |
513 |
lock.writeLock().unlock(); |
514 |
fail("should throw"); |
515 |
} |
516 |
catch(InterruptedException success) { |
517 |
} |
518 |
} |
519 |
}); |
520 |
|
521 |
try { |
522 |
t.start(); |
523 |
Thread.sleep(SHORT_DELAY_MS); |
524 |
t.interrupt(); |
525 |
t.join(SHORT_DELAY_MS); |
526 |
assertFalse(t.isAlive()); |
527 |
} |
528 |
catch (Exception ex) { |
529 |
fail("unexpected exception"); |
530 |
} |
531 |
} |
532 |
|
533 |
public void testAwaitNanos_Interrupt() { |
534 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
535 |
final Condition c = lock.writeLock().newCondition(); |
536 |
Thread t = new Thread(new Runnable() { |
537 |
public void run() { |
538 |
try { |
539 |
lock.writeLock().lock(); |
540 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
541 |
lock.writeLock().unlock(); |
542 |
fail("should throw"); |
543 |
} |
544 |
catch(InterruptedException success) { |
545 |
} |
546 |
} |
547 |
}); |
548 |
|
549 |
try { |
550 |
t.start(); |
551 |
Thread.sleep(SHORT_DELAY_MS); |
552 |
t.interrupt(); |
553 |
t.join(SHORT_DELAY_MS); |
554 |
assertFalse(t.isAlive()); |
555 |
} |
556 |
catch (Exception ex) { |
557 |
fail("unexpected exception"); |
558 |
} |
559 |
} |
560 |
|
561 |
public void testAwaitUntil_Interrupt() { |
562 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
563 |
final Condition c = lock.writeLock().newCondition(); |
564 |
Thread t = new Thread(new Runnable() { |
565 |
public void run() { |
566 |
try { |
567 |
lock.writeLock().lock(); |
568 |
java.util.Date d = new java.util.Date(); |
569 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
570 |
lock.writeLock().unlock(); |
571 |
fail("should throw"); |
572 |
} |
573 |
catch(InterruptedException success) { |
574 |
} |
575 |
} |
576 |
}); |
577 |
|
578 |
try { |
579 |
t.start(); |
580 |
Thread.sleep(SHORT_DELAY_MS); |
581 |
t.interrupt(); |
582 |
t.join(SHORT_DELAY_MS); |
583 |
assertFalse(t.isAlive()); |
584 |
} |
585 |
catch (Exception ex) { |
586 |
fail("unexpected exception"); |
587 |
} |
588 |
} |
589 |
|
590 |
public void testSignalAll() { |
591 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
592 |
final Condition c = lock.writeLock().newCondition(); |
593 |
Thread t1 = new Thread(new Runnable() { |
594 |
public void run() { |
595 |
try { |
596 |
lock.writeLock().lock(); |
597 |
c.await(); |
598 |
lock.writeLock().unlock(); |
599 |
} |
600 |
catch(InterruptedException e) { |
601 |
fail("unexpected exception"); |
602 |
} |
603 |
} |
604 |
}); |
605 |
|
606 |
Thread t2 = new Thread(new Runnable() { |
607 |
public void run() { |
608 |
try { |
609 |
lock.writeLock().lock(); |
610 |
c.await(); |
611 |
lock.writeLock().unlock(); |
612 |
} |
613 |
catch(InterruptedException e) { |
614 |
fail("unexpected exception"); |
615 |
} |
616 |
} |
617 |
}); |
618 |
|
619 |
try { |
620 |
t1.start(); |
621 |
t2.start(); |
622 |
Thread.sleep(SHORT_DELAY_MS); |
623 |
lock.writeLock().lock(); |
624 |
c.signalAll(); |
625 |
lock.writeLock().unlock(); |
626 |
t1.join(SHORT_DELAY_MS); |
627 |
t2.join(SHORT_DELAY_MS); |
628 |
assertFalse(t1.isAlive()); |
629 |
assertFalse(t2.isAlive()); |
630 |
} |
631 |
catch (Exception ex) { |
632 |
fail("unexpected exception"); |
633 |
} |
634 |
} |
635 |
|
636 |
public void testSerialization() { |
637 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
638 |
l.readLock().lock(); |
639 |
l.readLock().unlock(); |
640 |
|
641 |
try { |
642 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
643 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
644 |
out.writeObject(l); |
645 |
out.close(); |
646 |
|
647 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
648 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
649 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
650 |
r.readLock().lock(); |
651 |
r.readLock().unlock(); |
652 |
} catch(Exception e){ |
653 |
e.printStackTrace(); |
654 |
fail("unexpected exception"); |
655 |
} |
656 |
} |
657 |
|
658 |
|
659 |
} |