javax.realtime.DSS
Class PreemptableResource

java.lang.Object
  javax.realtime.DSS.Resource
      javax.realtime.DSS.PreemptableResource

public class PreemptableResource

extends Resource

A Resource modeling a resource that can be preempted.

Field Summary

Fields inherited from class javax.realtime.DSS.Resource

busyTimeThusFar, count, creationTime, holderThread, lastGrant, lastRelease, name, signalPriorityInversion, waiters

Constructor Summary

PreemptableResource(java.lang.String name)

PreemptableResource(java.lang.String name, boolean signalPriorityInversion)
Constructor

Method Summary

void	adjustPriority(RealtimeThread thread) Adjust the priority of this RealtimeThread, according to resources currently held.
void	release() Release this PreemptableResource.
void	seize() Seize this Preemptableresource.

Methods inherited from class javax.realtime.DSS.Resource

dutyCycle, finalize, getExtent, giveResourceTo, maxWaiterPriority, printAllStatistics, printStatistics, releaseIfHeld, seize, seizeIfNotHeld, setExtent, toString, waiterIterator

Methods inherited from class java.lang.Object

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

Constructor Detail

PreemptableResource

public PreemptableResource(java.lang.String name,
                           boolean signalPriorityInversion)

Constructor

Parameters:

name - The name of this

PreemptableResource

public PreemptableResource(java.lang.String name)

Method Detail

seize

public void seize()
           throws java.lang.InterruptedException,
                  ThreadTerminatedException

Seize this Preemptableresource. An internal loop is required to deal with the case where the resource was stolen between the time it was awarded by a releasing thread and the invoking thread starts to run.

Specified by:

seize in class Resource

Throws:

java.lang.InterruptedException

ThreadTerminatedException

release

public void release()
             throws ThreadTerminatedException

Release this PreemptableResource. May involve passing it on to a waiting thread.

Specified by:

release in class Resource

Throws:

ThreadTerminatedException

adjustPriority

public void adjustPriority(RealtimeThread thread)

Description copied from class: Resource

Adjust the priority of this RealtimeThread, according to resources currently held.

Specified by:

adjustPriority in class Resource