Package ptolemy.caltrop.ddi

Class SDF

java.lang.Object

ptolemy.caltrop.ddi.AbstractDDI

ptolemy.caltrop.ddi.Dataflow

ptolemy.caltrop.ddi.DataflowWithRates

ptolemy.caltrop.ddi.SDF

All Implemented Interfaces:

Executable, Initializable, DDI

public class SDF
extends DataflowWithRates

A plugin for the SDF domain. In SDF, a CAL actor is valid if:

1. The rates of each action are statically computable, and these rates are the same for each action.
2. There is at least one unguarded action.

This plugin also adds attributes containing rate information to the ports of the actor.

Since:

Ptolemy II 4.0

Version:

$Id$

Author:

Christopher Chang, Steve Neuendorffer

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Red (cxh)

Nested Class Summary

Nested classes/interfaces inherited from class ptolemy.caltrop.ddi.DataflowWithRates

DataflowWithRates.ActionRateSignature

Field Summary

Fields inherited from class ptolemy.caltrop.ddi.Dataflow

_actions, _actor, _actorInterpreter, _context, _currentStateSet, _currentTransitions, _env, _inputPorts, _lastFiredAction, _outputPorts, _ptActor

Fields inherited from interface ptolemy.actor.Executable

COMPLETED, NOT_READY, STOP_ITERATING

Constructor Summary

Constructors

Constructor	Description
SDF(TypedAtomicActor ptActor, caltrop.interpreter.ast.Actor actor, caltrop.interpreter.Context context, caltrop.interpreter.environment.Environment env)	Create an new SDF DDI.

Method Summary

Modifier and Type	Method	Description
java.lang.String	getName()	Get the name of this DDI.
boolean	isLegalActor()	In SDF, an actor is legal if: The rates of each action are statically computable, and these rates are the same for each action.
void	setupActor()	Setup the actor associated with this DDI.

Methods inherited from class ptolemy.caltrop.ddi.DataflowWithRates

_allEqual, _annotatePortsWithRates, _atLeastOneUnguardedAction, _checkInitializerGuards, _computeActionRates, _computeActionRates, _isBoundByPortVar

Methods inherited from class ptolemy.caltrop.ddi.Dataflow

_selectAction, _selectInitializer, fire, initialize, postfire, prefire, preinitialize

Methods inherited from class ptolemy.caltrop.ddi.AbstractDDI

addInitializable, isFireFunctional, isStrict, iterate, removeInitializable, stop, stopFire, terminate, wrapup

Methods inherited from class java.lang.Object

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

Constructor Detail

SDF

public SDF(TypedAtomicActor ptActor,
           caltrop.interpreter.ast.Actor actor,
           caltrop.interpreter.Context context,
           caltrop.interpreter.environment.Environment env)

Create an new SDF DDI.

Parameters:

ptActor - The instance of ptolemy.actor.Actor that the plugin will be associated with.

actor - The abstract syntax tree of the CAL source.

context - The context that the plugin will use.

env - The environment that the plugin will use.

Method Detail

isLegalActor

public boolean isLegalActor()

In SDF, an actor is legal if:

1. The rates of each action are statically computable, and these rates are the same for each action.
2. There is at least one unguarded action.
3. The rates and guards of the initializers are statically computable.

Specified by:

isLegalActor in interface DDI

Overrides:

isLegalActor in class Dataflow

Returns:

True if the actor associated with this DDI is a legal SDF actor.

getName

public java.lang.String getName()

Get the name of this DDI.

Specified by:

getName in interface DDI

Overrides:

getName in class Dataflow

Returns:

"SDF".

setupActor

public void setupActor()

Setup the actor associated with this DDI. Assumes that isLegalActor() is called first.

Setup involves attaching attributes with token consumption/production rates to the input and output ports of the actor associated with this DDI.

Specified by:

setupActor in interface DDI

Overrides:

setupActor in class Dataflow