org.apache.avalon.excalibur.concurrent
Class DjikstraSemaphore

java.lang.Object
  |
  +--org.apache.avalon.excalibur.concurrent.DijkstraSemaphore
        |
        +--org.apache.avalon.excalibur.concurrent.DjikstraSemaphore

Deprecated. Replaced by by DijkstraSemaphore.

public class DjikstraSemaphore

extends DijkstraSemaphore

Also called counting semaphores, Djikstra semaphores are used to control access to a set of resources. A Djikstra semaphore has a count associated with it and each acquire() call reduces the count. A thread that tries to acquire() a Djikstra semaphore with a zero count blocks until someone else calls release() thus increasing the count.

Since:

4.0

Version:

CVS $Revision: 1.4 $ $Date: 2001/12/11 09:53:27 $

Author:

Karthik Rangaraju

Constructor Summary

DjikstraSemaphore(int maxCount)
Deprecated. Creates a Djikstra semaphore with the specified max count and initial count set to the max count (all resources released)

DjikstraSemaphore(int maxCount, int initialCount)
Deprecated. Creates a Djikstra semaphore with the specified max count and an initial count of acquire() operations that are assumed to have already been performed.

Methods inherited from class org.apache.avalon.excalibur.concurrent.DijkstraSemaphore

acquire, acquireAll, release, release, releaseAll, starvationCheck, tryAcquire

Methods inherited from class java.lang.Object

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

Constructor Detail

DjikstraSemaphore

public DjikstraSemaphore(int maxCount)

Deprecated.

Creates a Djikstra semaphore with the specified max count and initial count set to the max count (all resources released)

Parameters:

pMaxCount - is the max semaphores that can be acquired

DjikstraSemaphore

public DjikstraSemaphore(int maxCount,
                         int initialCount)

Deprecated.

Creates a Djikstra semaphore with the specified max count and an initial count of acquire() operations that are assumed to have already been performed.

Parameters:

pMaxCount - is the max semaphores that can be acquired