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dl |
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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public class ReentrantLockTest extends TestCase { |
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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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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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* 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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fail("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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t.start(); |
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t.interrupt(); |
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lock.unlock(); |
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} |
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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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lock.tryLock(1000,TimeUnit.MILLISECONDS); |
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fail("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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t.start(); |
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t.interrupt(); |
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} |
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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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assertFalse(lock.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.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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assertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
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} catch (Exception ex) { |
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fail("unexpected exception"); |
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} |
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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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Thread.sleep(SHORT_DELAY_MS * 2); |
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} |
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catch(Exception e) {} |
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lock.unlock(); |
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} |
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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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dl |
1.3 |
public void testLockInterruptibly() { |
170 |
dl |
1.1 |
final ReentrantLock lock = new ReentrantLock(); |
171 |
dl |
1.3 |
try { |
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lock.lockInterruptibly(); |
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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 |
Thread t = new Thread(new Runnable() { |
177 |
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public void run() { |
178 |
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try { |
179 |
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lock.lockInterruptibly(); |
180 |
dl |
1.3 |
fail("should throw"); |
181 |
dl |
1.1 |
} |
182 |
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catch(InterruptedException e) {} |
183 |
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} |
184 |
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}); |
185 |
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(); |
191 |
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} catch(Exception e){ |
192 |
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fail("unexpected exception"); |
193 |
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} |
194 |
dl |
1.1 |
} |
195 |
dl |
1.2 |
|
196 |
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public void testAwait_IllegalMonitor() { |
197 |
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final ReentrantLock lock = new ReentrantLock(); |
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final Condition c = lock.newCondition(); |
199 |
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try { |
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c.await(); |
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fail("should throw"); |
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} |
203 |
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catch (IllegalMonitorStateException success) { |
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} |
205 |
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catch (Exception ex) { |
206 |
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fail("should throw IMSE"); |
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} |
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} |
209 |
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210 |
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public void testSignal_IllegalMonitor() { |
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final ReentrantLock lock = new ReentrantLock(); |
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final Condition c = lock.newCondition(); |
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try { |
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c.signal(); |
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fail("should throw"); |
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} |
217 |
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catch (IllegalMonitorStateException success) { |
218 |
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} |
219 |
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catch (Exception ex) { |
220 |
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fail("should throw IMSE"); |
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} |
222 |
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} |
223 |
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public void testAwaitNanos_Timeout() { |
225 |
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final ReentrantLock lock = new ReentrantLock(); |
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final Condition c = lock.newCondition(); |
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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(); |
232 |
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} |
233 |
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catch (Exception ex) { |
234 |
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fail("unexpected exception"); |
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} |
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} |
237 |
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public void testAwait_Timeout() { |
239 |
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final ReentrantLock lock = new ReentrantLock(); |
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final Condition c = lock.newCondition(); |
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try { |
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lock.lock(); |
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assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
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lock.unlock(); |
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} |
246 |
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catch (Exception ex) { |
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fail("unexpected exception"); |
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} |
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} |
250 |
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public void testAwaitUntil_Timeout() { |
252 |
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final ReentrantLock lock = new ReentrantLock(); |
253 |
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final Condition c = lock.newCondition(); |
254 |
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try { |
255 |
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lock.lock(); |
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java.util.Date d = new java.util.Date(); |
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assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
258 |
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lock.unlock(); |
259 |
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} |
260 |
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catch (Exception ex) { |
261 |
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fail("unexpected exception"); |
262 |
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} |
263 |
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} |
264 |
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265 |
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public void testAwait() { |
266 |
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final ReentrantLock lock = new ReentrantLock(); |
267 |
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final Condition c = lock.newCondition(); |
268 |
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Thread t = new Thread(new Runnable() { |
269 |
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public void run() { |
270 |
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try { |
271 |
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lock.lock(); |
272 |
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c.await(); |
273 |
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lock.unlock(); |
274 |
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} |
275 |
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catch(InterruptedException e) { |
276 |
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fail("unexpected exception"); |
277 |
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} |
278 |
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} |
279 |
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}); |
280 |
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281 |
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try { |
282 |
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t.start(); |
283 |
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Thread.sleep(SHORT_DELAY_MS); |
284 |
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lock.lock(); |
285 |
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c.signal(); |
286 |
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lock.unlock(); |
287 |
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t.join(SHORT_DELAY_MS); |
288 |
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assertFalse(t.isAlive()); |
289 |
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} |
290 |
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catch (Exception ex) { |
291 |
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fail("unexpected exception"); |
292 |
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} |
293 |
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} |
294 |
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295 |
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public void testAwaitUninterruptibly() { |
296 |
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final ReentrantLock lock = new ReentrantLock(); |
297 |
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final Condition c = lock.newCondition(); |
298 |
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Thread t = new Thread(new Runnable() { |
299 |
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public void run() { |
300 |
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lock.lock(); |
301 |
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c.awaitUninterruptibly(); |
302 |
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lock.unlock(); |
303 |
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} |
304 |
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}); |
305 |
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306 |
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try { |
307 |
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t.start(); |
308 |
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Thread.sleep(SHORT_DELAY_MS); |
309 |
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t.interrupt(); |
310 |
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lock.lock(); |
311 |
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c.signal(); |
312 |
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lock.unlock(); |
313 |
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t.join(SHORT_DELAY_MS); |
314 |
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assertFalse(t.isAlive()); |
315 |
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} |
316 |
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catch (Exception ex) { |
317 |
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fail("unexpected exception"); |
318 |
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} |
319 |
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} |
320 |
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321 |
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public void testAwait_Interrupt() { |
322 |
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final ReentrantLock lock = new ReentrantLock(); |
323 |
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final Condition c = lock.newCondition(); |
324 |
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Thread t = new Thread(new Runnable() { |
325 |
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public void run() { |
326 |
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try { |
327 |
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lock.lock(); |
328 |
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c.await(); |
329 |
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lock.unlock(); |
330 |
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fail("should throw"); |
331 |
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} |
332 |
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catch(InterruptedException success) { |
333 |
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} |
334 |
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} |
335 |
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}); |
336 |
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|
337 |
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try { |
338 |
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t.start(); |
339 |
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Thread.sleep(SHORT_DELAY_MS); |
340 |
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t.interrupt(); |
341 |
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t.join(SHORT_DELAY_MS); |
342 |
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assertFalse(t.isAlive()); |
343 |
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} |
344 |
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catch (Exception ex) { |
345 |
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fail("unexpected exception"); |
346 |
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} |
347 |
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} |
348 |
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|
349 |
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public void testAwaitNanos_Interrupt() { |
350 |
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final ReentrantLock lock = new ReentrantLock(); |
351 |
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final Condition c = lock.newCondition(); |
352 |
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Thread t = new Thread(new Runnable() { |
353 |
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public void run() { |
354 |
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try { |
355 |
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lock.lock(); |
356 |
|
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c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
357 |
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lock.unlock(); |
358 |
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fail("should throw"); |
359 |
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} |
360 |
|
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catch(InterruptedException success) { |
361 |
|
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} |
362 |
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} |
363 |
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}); |
364 |
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|
365 |
|
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try { |
366 |
|
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t.start(); |
367 |
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Thread.sleep(SHORT_DELAY_MS); |
368 |
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t.interrupt(); |
369 |
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t.join(SHORT_DELAY_MS); |
370 |
|
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assertFalse(t.isAlive()); |
371 |
|
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} |
372 |
|
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catch (Exception ex) { |
373 |
|
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fail("unexpected exception"); |
374 |
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} |
375 |
|
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} |
376 |
|
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|
377 |
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public void testAwaitUntil_Interrupt() { |
378 |
|
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final ReentrantLock lock = new ReentrantLock(); |
379 |
|
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final Condition c = lock.newCondition(); |
380 |
|
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Thread t = new Thread(new Runnable() { |
381 |
|
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public void run() { |
382 |
|
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try { |
383 |
|
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lock.lock(); |
384 |
|
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java.util.Date d = new java.util.Date(); |
385 |
|
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c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
386 |
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lock.unlock(); |
387 |
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fail("should throw"); |
388 |
|
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} |
389 |
|
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catch(InterruptedException success) { |
390 |
|
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} |
391 |
|
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} |
392 |
|
|
}); |
393 |
|
|
|
394 |
|
|
try { |
395 |
|
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t.start(); |
396 |
|
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Thread.sleep(SHORT_DELAY_MS); |
397 |
|
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t.interrupt(); |
398 |
|
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t.join(SHORT_DELAY_MS); |
399 |
|
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assertFalse(t.isAlive()); |
400 |
|
|
} |
401 |
|
|
catch (Exception ex) { |
402 |
|
|
fail("unexpected exception"); |
403 |
|
|
} |
404 |
|
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} |
405 |
|
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|
406 |
|
|
public void testSignalAll() { |
407 |
|
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final ReentrantLock lock = new ReentrantLock(); |
408 |
|
|
final Condition c = lock.newCondition(); |
409 |
|
|
Thread t1 = new Thread(new Runnable() { |
410 |
|
|
public void run() { |
411 |
|
|
try { |
412 |
|
|
lock.lock(); |
413 |
|
|
c.await(); |
414 |
|
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lock.unlock(); |
415 |
|
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} |
416 |
|
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catch(InterruptedException e) { |
417 |
|
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fail("unexpected exception"); |
418 |
|
|
} |
419 |
|
|
} |
420 |
|
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}); |
421 |
|
|
|
422 |
|
|
Thread t2 = new Thread(new Runnable() { |
423 |
|
|
public void run() { |
424 |
|
|
try { |
425 |
|
|
lock.lock(); |
426 |
|
|
c.await(); |
427 |
|
|
lock.unlock(); |
428 |
|
|
} |
429 |
|
|
catch(InterruptedException e) { |
430 |
|
|
fail("unexpected exception"); |
431 |
|
|
} |
432 |
|
|
} |
433 |
|
|
}); |
434 |
|
|
|
435 |
|
|
try { |
436 |
|
|
t1.start(); |
437 |
|
|
t2.start(); |
438 |
|
|
Thread.sleep(SHORT_DELAY_MS); |
439 |
|
|
lock.lock(); |
440 |
|
|
c.signalAll(); |
441 |
|
|
lock.unlock(); |
442 |
|
|
t1.join(SHORT_DELAY_MS); |
443 |
|
|
t2.join(SHORT_DELAY_MS); |
444 |
|
|
assertFalse(t1.isAlive()); |
445 |
|
|
assertFalse(t2.isAlive()); |
446 |
|
|
} |
447 |
|
|
catch (Exception ex) { |
448 |
dl |
1.3 |
fail("unexpected exception"); |
449 |
|
|
} |
450 |
|
|
} |
451 |
|
|
|
452 |
|
|
public void testSerialization() { |
453 |
|
|
ReentrantLock l = new ReentrantLock(); |
454 |
|
|
l.lock(); |
455 |
|
|
l.unlock(); |
456 |
|
|
|
457 |
|
|
try { |
458 |
|
|
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
459 |
|
|
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
460 |
|
|
out.writeObject(l); |
461 |
|
|
out.close(); |
462 |
|
|
|
463 |
|
|
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
464 |
|
|
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
465 |
|
|
ReentrantLock r = (ReentrantLock) in.readObject(); |
466 |
|
|
r.lock(); |
467 |
|
|
r.unlock(); |
468 |
|
|
} catch(Exception e){ |
469 |
|
|
e.printStackTrace(); |
470 |
dl |
1.2 |
fail("unexpected exception"); |
471 |
|
|
} |
472 |
|
|
} |
473 |
dl |
1.1 |
|
474 |
|
|
} |