edu.utah.janosvm.kit.comm.amiga
Class SignalDispatcher

java.lang.Object
  |
  +--edu.utah.janosvm.kit.comm.amiga.SignalDispatcher

All Implemented Interfaces:

java.lang.Runnable

public class SignalDispatcher

extends java.lang.Object

implements java.lang.Runnable

A SignalDispatcher provides some basic infrastructure for dispatching signals received by a SignalSet.

Field Summary

private boolean	active Flag indicating whether the run method is currently running or not.
private List	handlers The list of objects that can handle certain signals.
static int	SIG_EXIT Reserved signal used to cause the dispatcher to exit the run() method.
private static int	SIG_NEW_MASK Reserved signal used to indicate that there was a change in the signal mask.
private SignalSet	ss The SignalSet to handle signals for.
private static TeamLocal	TEAM_DISPATCHER
private long	waitMask The set of signals to wait for.

Constructor Summary

SignalDispatcher()
Construct an empty SignalDispatcher.

Method Summary

void	addHandler(SignalHandler sh) Add a SignalHandler to this dispatcher.
void	exit() Send the SIG_EXIT signal to the dispatcher so that it will exit the handler loop.
SignalSet	getSignalSet()
static SignalDispatcher	getTeamDispatcher()
boolean	isActive()
void	remHandler(SignalHandler sh) Remove a SignalHandler from the dispatcher.
void	run()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait, wait0

Field Detail

TEAM_DISPATCHER

private static final TeamLocal TEAM_DISPATCHER

SIG_EXIT

public static final int SIG_EXIT

Reserved signal used to cause the dispatcher to exit the run() method.

SIG_NEW_MASK

private static final int SIG_NEW_MASK

Reserved signal used to indicate that there was a change in the signal mask.

ss

private final SignalSet ss

The SignalSet to handle signals for.

handlers

private final List handlers

The list of objects that can handle certain signals.

waitMask

private long waitMask

The set of signals to wait for.

active

private boolean active

Flag indicating whether the run method is currently running or not.

Constructor Detail

SignalDispatcher

public SignalDispatcher()

Construct an empty SignalDispatcher.

Method Detail

getSignalSet

public SignalSet getSignalSet()

Returns:

The SignalSet that this dispatcher listens on.

addHandler

public void addHandler(SignalHandler sh)

Add a SignalHandler to this dispatcher.

Parameters:

sh - An initialized SignalHandler that will handle a given signal.

remHandler

public void remHandler(SignalHandler sh)

Remove a SignalHandler from the dispatcher.

Parameters:

sh - The SignalHandler to remove.

isActive

public boolean isActive()

Returns:

True if the run() method is running, false otherwise.

run

public void run()

Specified by:

run in interface java.lang.Runnable

exit

public void exit()

Send the SIG_EXIT signal to the dispatcher so that it will exit the handler loop.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getTeamDispatcher

public static final SignalDispatcher getTeamDispatcher()

Returns:

The SignalDispatcher for this team.