RE: ds alignment (was Prototyping printf())

["David Morris" <dmorris@xxxxxxxxxxxxx>]

Barbara,

Sorry, my intention was not to contradict your comments, my point is 
that this sort of code should be encapsulated and not scattered all over 
your applications.  In response to your original comments, one exception 
to the DS alignment  (unless something has changed) is that a MODS is 
not padded out to force alignment.

David Morris

>>> bmorris@ca.ibm.com 10/11/00 10:49AM >>>

>Date: Tue, 10 Oct 2000 09:05:21 -0600
>From: "David Morris" <dmorris@plumcreek.com>
>
>Last October, Midrange Computing ran an article titled "Put it in
Storage".   The code
>in that article describes using user spaces and user indexes to store
data.  One feature
>is an align procedure that ensures a pointer type variable is on a 16 byte
boundary.
>Subprocedure AlnOff in the file fig6_stgtkt.txt adjusts an offset to a
boundary. I rely on
>this code extensively and have not had any problems.  The only assumption
is that a
>User Space is aligned.  If this assumption is incorrect, at least
everything is going
>through a single interface.  You can get the source at:

David, user spaces are 16-byte aligned.  When I sid that only the
presence of a pointer will force 16-byte alignment, I was only talking
about a "declared" structure, in static or automatic storage in your
program.

Barbara Morris


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