[openib-general] [PATCH][RFC] kDAPL: remove dat wrapper funct ion dat_ia_query()

[Caitlin Bestler]

On 6/13/05, James Lentini <jlentini at netapp.com> wrote:

> > but I do agree that the _common structure is not ideal and sorta ugly.
> 
> I like it on the basis that if gathers up the common structure members
> in one place, hence making maintenance of these fields easier in the
> future. Granted, there are only two of them, so losing it wouldn't be
> a big deal.
> 

What's important is that enables dapl objects to be handled polymorphically.
Internally there are many times when a utility routine only needs to know
that something is a dapl object, not which one it is.

The alternative is to have some other mechanism to ensure that the
shared fields are defined compatibly in all sub-types. This is doable,
but declaring a common header is generally the simpler and more
self-documenting method of implementing a parent type with
multiple sub-types in plain C.

The external requirements for polymorphic dapl handles are fewer:
get/set consumer handle (which ismostly be for user mode
programs anyway) and some methods apply to either a PSP or
RSP.
 
> >
> > -tduffy
> >
>