RE: Sharing variables between procedures

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

> From: Fisher, Don
> 
> These procedures are all in the same module.  I thought about making
the
> data structures global, but I really want each of the four "main"
> procedures
> to have independent copies of the data.  I could, of course, define
four
> global data structures with the PREFIX keyword, but I think the
> EXPORT/IMPORT approach is more elegant.  It has the added benefit of
> showing
> the relationship between the "main" and "child" procedures.

I don't think EXPORT/IMPORT will do what you want it to do.  Back in the
bad old days, we called these "external references", and what they in
fact do is point all the IMPORTed references to the one EXPORTed
variable.  In effect, they all shard the same address.  So if ProcA
updates the IMPORTed variable, ProcB will see the change (as will ProcC,
ProcD and the main procedure).

I guess I don't understand what you're trying to do.  Typically, I TRY
to get all my procedures to share a common buffer where practical.  I
can't quite get my brain around why you want multiple copies of the
data.

Joe