net.sf.hajdbc.util.concurrent

Class SemaphoreReadWriteLock

java.lang.Object

net.sf.hajdbc.util.concurrent.SemaphoreReadWriteLock

All Implemented Interfaces:

java.util.concurrent.locks.ReadWriteLock

public class SemaphoreReadWriteLock
extends java.lang.Object
implements java.util.concurrent.locks.ReadWriteLock

Simple ReadWriteLock implementation that uses a semaphore. A read lock requires 1 permit, while a write lock requires all the permits. Lock upgrading and downgrading is not supported; nor are conditions.

Author:

Paul Ferraro

Constructor Summary

Constructors

Constructor and Description
SemaphoreReadWriteLock(boolean fair)
SemaphoreReadWriteLock(int permits, boolean fair)

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.locks.Lock	readLock()
java.util.concurrent.locks.Lock	writeLock()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SemaphoreReadWriteLock

public SemaphoreReadWriteLock(boolean fair)

SemaphoreReadWriteLock

public SemaphoreReadWriteLock(int permits,
                              boolean fair)

Method Detail

readLock

public java.util.concurrent.locks.Lock readLock()

Specified by:

readLock in interface java.util.concurrent.locks.ReadWriteLock

See Also:

ReadWriteLock.readLock()

writeLock

public java.util.concurrent.locks.Lock writeLock()

Specified by:

writeLock in interface java.util.concurrent.locks.ReadWriteLock

See Also:

ReadWriteLock.writeLock()