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From: Boris (boris_at_[hidden])
Date: 2005-04-26 05:54:43

Iain K. Hanson wrote:
> Hi
> I created the layers concept for the C++ Networking boost library.
> The layers I defined are:
> Layer 1 :- Light weight wrappers arround predominantl BSD socket
> concepts.
> Layer 2 :- Acceptor, Connector, Reactor, and Svc_Handler concepts ala
> ACE.
> Layer 3 :- An optional iostreams interface if desirable?
> Layer 4:- Applications layer - includes ftp, telent, http/s And user
> applications

Is layer a package or a level of abstraction? I ask as I wonder if eg. layer
3 is based on layer 2?

If you look at I put the
packages "ace" (your layer 2) and "iostream" (your layer 3) both in layer 1
because they don't necessarily depend on each other and I don't know if we
can tell which one of the two packages has a higher level of abstraction.

> [...]
> Boris has also been atempting bto model Layer 1 but keeps calling
> itlayer 0.

Hey, everyone called it level 0! :-)

> we need a common nomenclture or confusion will reign.

That's why I added the link to the package structure at everywhere to make sure we
talk about the same. It's quite similar to your layers concept except that
you created new application layer.


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