RE: [UDI-protocols] UDI drivers and protocol modules in application libraries

[Quick, K. <Kev...@Su...>]

Bob,

I'm not sure what antecedent you intended in your reference to
"they" below, but here's an answer and tell me if it's answering
your question:

UDI drivers are written for location independence.  This means that
the only thing that they are aware of is that they are running in a
UDI environment.  They have no awareness of running in a kernel
environment, user environment, or otherwise.

There can be user-space UDI environments as well as kernel-space
UDI environments (our prototype POSIX environments are a rough
version of the former).  The principle challenge to a user-space UDI
environment is support of the Physical I/O spec. (should it choose to do
so).

A user-space UDI environment would tend to be a little more than a
"library" because it would have independent execution contexts and
global elements (such as the Management Agent) that are not
traditionally aspects of a library.
It's a little hard to quantify because a UDI environment is very exactly
specified
whereas a "library" is more of a common nomenclature than a precise
specification.

Regards,
  Kevin


-----Original Message-----
From:	Barned, Robert [mailto:rob...@lm...]
Sent:	Wed 02/10/02 10:53 AM
To:	Project UDI Protocol Metalanguages Discussions
Cc:	
Subject:	[UDI-protocols] UDI drivers and protocol modules in
application libraries
All,

Does it makes sense to implement a UDI environment as part 
of an application library so that they can communicate with 
kernel drivers (UDI or non-UDI), but provide functionality that 
might be better to not include in the kernel?


Bob


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