Concurrent Schedules

[Doug Donalson;]

Roger or Glen,

   I have been trying to modify the concurrent schedule to
be able to remove an action.  I admit I feel like one of
the three blind men trying to describe the elephant.

Here's where I am:

1.) concurrent schedule is a subclass of schedule that
adds one variable   CAction  *actionConcurrent;

2.) It overrides several schedule messages including
remove: aMember.  (The override doesn't seem to be
in the .h file interface def.

3.)  Schedule uses super (which is map_c) to perform the
actual remove so as a first shot I thought I'd try the same
with the concurrent schedule.  

4.)  If I use super (from concurrent schedule) I would get 
Schedule remove: which would become recursive (and never ending?)
so I patched:

- remove: anAction
{
id nullAction;

  nullAction= callMethodInClass( id_Map_c, M(remove:), anAction );
  return nullAction;
}

for the concurrent schedule remove message.  As far as it went
this worked okay as nullAction == anActionwhen this was used.

Unfortunatly, I have discovered that this interface is more complicated
than this.  The actions that I removed were in fact gone 
but there is still a dangling pointer somewhere.

I sometimes get an object lookup error in Xactivity but more
illuminating was the message list_linked doesn't respond to
perform_action.  

How do I fix this?  (For various reasons this is necessary
for my simulation to function properly.)

Cheers?

   Doug Donalson

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