javax.safetycritical

Class AperiodicEvent

java.lang.Object

javax.safetycritical.AsyncEvent

javax.safetycritical.AperiodicEvent

@SCJAllowed(value=LEVEL_1)
public class AperiodicEvent
extends AsyncEvent

Version:

1.0; - May 2012

Author:

Anders P. Ravn, Aalborg University, apr@cs.aau.dk,
Hans Søndergaard, VIA University College, Denmark, hso@viauc.dk

Relative_to_SCJ_Draft_Version_0.79:

- The super-class AsyncEvent is superflous. It is package protected in this version.

- Semantic clarification: the attached handlers are a set.(handlers cannot be added twice)
- Semantic issue: Is fire count a general semaphore for each attached handler. I.e. fire count equals number of releases?

- Implementation issue: fire must not allocate memory. Thus if the object has a list of handlers, then:

• a) a scope violation, or
  
• b) the object and the list have to be in mission memory and handlers are added during initialization only. This prevents dynamic addition and removal for Level 2, or
  
• c) fire is implemented by a search through AperiodicEventHandlers and their event-lists.

- Perhaps it would be wiser to eliminate Event, and introduce the fire method on the handler ?

Constructor Summary

Constructors

Constructor and Description
AperiodicEvent()

Method Summary

Methods

Modifier and Type	Method and Description
void	fire() Fire this event, i.e., releases the execution of all handlers that were added to this event.

Methods inherited from class java.lang.Object

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

Constructor Detail

AperiodicEvent

public AperiodicEvent()

Method Detail

fire

@SCJAllowed(value=LEVEL_1)
@SCJRestricted(value=EXECUTE)
public final void fire()

Fire this event, i.e., releases the execution of all handlers that were added to this event.

Overrides:

fire in class AsyncEvent