RE: Module source naming schemes

Scott,

Your description of how to modify a service program was good except for one
detail.  When you are a new procedure to a service program you have to put
it at the end of the list in the *CURRENT section in the binder source.
That is because the programs that are using the service program don't retain
the name, just that they are to call the 3rd export from the service
program.  In your example below, a program that had previously been bound to
this service program and was calling RNF_CLOSE would now call RNF_READP if
it wasn't rebound.  In the best case, the program would bomb when making
this call.  In the worst case, it won't get an error and appear to work and
just do strange things (I have been here and it is not a good place!).  You
may already know this but wanted to make sure that anyone new to service
programs was aware of this little detail.

Scott Mildenberger

> -----Original Message-----
> From: Scott Klement [mailto:klemscot@klements.com]
> Sent: Tuesday, January 09, 2001 10:56 PM
> To: RPG400-L@midrange.com
> Subject: Re: Module source naming schemes
> 
> 
> 
> If you decide to add another function, for example 
> rnf_readp(), later on
> you'd change your bindery source to look like this:
> 
> STRPGMEXP PGMLVL(*CURRENT)
>      EXPORT SYMBOL(RNF_OPEN)
>      EXPORT SYMBOL(RNF_READ)
>      EXPORT SYMBOL(RNF_READP)
>      EXPORT SYMBOL(RNF_CLOSE)
> ENDPGMEXP
> STRPGMEXP PGMLVL(*PRV)
>      EXPORT SYMBOL(RNF_OPEN)
>      EXPORT SYMBOL(RNF_READ)
>      EXPORT SYMBOL(RNF_CLOSE)
> ENDPGMEXP
> 
> The existing programs will have signatures that match the 
> *PRV section,
> and they'll use that interface.  The new programs that you 
> bind will grab
> the new signature, and use the *CURRENT section.  Very simple.
> 
> 
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