[MUD-Dev] Re: atomic functions

[Adam Wiggins]

On Tue, 5 May 1998, Shawn Halpenny wrote:
> I want a method to do this without having to write the code in a special way,
> though:  I don't want the scriptor to have to think about breaking his "add
> 10 to the max_damage of every adamantine sword whose name begins with the
> letter 'Q'" event into a chain of events (one per sword, by the time all is
> said and done), just to make sure that an update of that breadth will
> commit in timely fashion.  Roughly, I want the scriptor to be able to
> write something like:
> 
> function foo()
> {
> 	foreach obj (obj_in_world.type == "admantine sword")
> 	{
> 		... some stuff ...
> 
> 		obj.max_damage += 10;
> 
> 		... more stuff ...
> 	}
> }
> 
> and not have the server handle foo() single-threadedly.

Hrm - perhaps everything between ANY set of braces should be considered
a function?

> Is breaking that loop into an event chain as simple as scheduling an event to
> execute the guts of the loop on each iteration?  I think you'd still end up
> with a lot of failed C&C's as those new events ripened, since the
> foo() event hasn't completed looping yet.
> 
> Would the effect be less drastic if the attributes were stored as distinct
> objects in the DB, rather than considering mud objects as the base storage
> unit?  That way, the only time C&C would fail is if some other event had
> touched the exact same attribute, as opposed to just touching the object.
> (I'm particularly hoping someone (like JCL!) will have tried something like
> that and can feedback here).

Do an archive search for C&C.  You'll pull up a ton of stuff, probably
most of it from JCL.  Then if you have questions/things to add you can do
a followup.  We love resurrecting ancient threads here!

Adam



--
MUD-Dev: Advancing an unrealised future.