Re: API

["Uma Balasubramanian" <Uma_Balasubramanian@xxxxxxxxxxxxxxx>]

the two calls are being made many times ... in the sense, we have a
procedure in a service program is using these user space APIs and the
procedures is being called from many programs (both online and batch) many
times.





Scott Klement <klemscot@klements.com>@midrange.com on 09/26/2002 12:52:34
PM

Please respond to rpg400-l@midrange.com

Sent by:  rpg400-l-admin@midrange.com


To:   rpg400-l@midrange.com
cc:

Subject:  Re: API


On Thu, 26 Sep 2002, Uma Balasubramanian wrote:
>
> Are APIs (I am looking for User space API - in particular) available as
> 'procedure's? In other words, when I call a User Space API in my RPGLE
> program, through I use CALLP, it is a program. Are procedures available
for
> these ?
>

There are many APIs that are implemented as procedures in service
programs.  There are many others that are implemented as programs instead.
The advantage of procedures is that they're faster, the advantage of
programs is that they're usable from OPM applications.

The User Space APIs, as you've already noticed, are programs.  This is a
good thing, because it means you can call them from more different
environments.

Speed isn't really important for the User Space APIs, since you only need
to make two calls.   One to create the space, and one to get a pointer to
the space.   Once you've gotten the pointer, you don't need to call the
APIs.... so speed isn't really an issue.

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