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From: Oliver Kowalke <oliver.kowalke@gmx.de>
Newsgroups: comp.lang.ada
Subject: Re: networking support?
Date: Thu, 18 Dec 2008 12:55:35 +0100
Organization: 1&1 Internet AG
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Date: 2008-12-18T12:55:35+01:00
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Georg Bauhaus wrote:

> Oliver Kowalke schrieb:
>> Hi,
>> does Ada support IPsec (key management sockets)? How is io-demultiplexing
>> used (select, epoll, kqueue, /dev/pool,...) used?
> 
> These being OS functions, you probably have interfacing
> packages for your compiler. For some, you might be able to use
> POSIX packages;  others, such as access to /dev/anything are
> really OS specific, not typically built into
> any programming language, but rather available as
> library calls.  In case you want to call them directly,
> as you would using C, just call them, after, say,
> 
>    function select
>      (nfds: C.int, ... etc etc ...) retrun C.int;
> 
>    pragma Inport(C, select);

Because I'm novice to Ada is it true that I can call C functions and C++
classes from Ada?
If yes - what is the prefered usage: should I implement functionality (for
isntacne networking) in C++ classes and call them from Ada or use the
C-functions (system calls) and implement the classes/behaviour in Ada (get
benefits from Ada's safety)?

Oliver