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 http://www.highscore.de/boost/net/packages.png 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 http://www.highscore.de/boost/net/packages.png everywhere to make sure we talk about the same. It's quite similar to your layers concept except that you created new application layer. Boris