Re: Subclassing NSPort (or NSSocketPort)
Re: Subclassing NSPort (or NSSocketPort)
- Subject: Re: Subclassing NSPort (or NSSocketPort)
- From: Wade Tregaskis <email@hidden>
- Date: Wed, 23 Jul 2003 09:07:45 +1000
There is a great deal of documentation, just not in Foundation. I
think what is there
suffices. The NSPortMessage class says what the components are. And
NSPort
documents states what facilities it provides access to: mach ports and
sockets.
I did manage to find a lot of the info I needed, after doing a very
thorough read of the DO docs. The problem is that all the information
relevant to NSPort's and the like is hidden in the various concept
overviews, not in the class documentation where it logically belongs
(or should at least be repeated). Hopefully someone at Apple pays
attention to this. (FWIW, some information I had to get from a 1997
archive of the Foundation docs, found via Google!).
I don't think the problem is with a lack of understanding of sockets
and the like. I of course have my socket setup and ready to go. The
problem is in understanding exactly what an NSPort has to do, in a
simple procedural way. I think I've nailed it down now, but one last
thing bugs me - how exactly am I supposed to encode my NSPort subclass?
I'm not sure whether I'm supposed to do it via the NSCoding protocol,
or just do it internally when I'm given my subclass to transmit, but
either way - what exactly must I do at the other end? Looking at the
GnuStep NSSocketPort, they appear to encode only the socket's address
and port, and then find an existing socket with that address and port
at the other end. Is it a simple matter of "connecting" the real Port
at the sending end to a symbolic instance at the receiving end, or is
the the receiving end Port supposed to actually work [and send data
back to the original sender]?
Wade Tregaskis
-- Sed quis custodiet ipsos custodes?
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