From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,e6293bc5c0d52b2b
X-Google-Attributes: gid103376,public
From: Andi Kleen <ak-uu@muc.de>
Subject: Re: Unix SELECT Ada binding
Date: 1999/07/22
Message-ID: <m3k8rsu5ky.fsf@fred.muc.de>#1/1
X-Deja-AN: 504029717
References: <379638B1.101427E5@res.raytheon.com>
Content-Type: text/plain; charset=us-ascii
X-Complaints-To: news@fred.muc.de
X-Trace: fred.muc.de 932653373 878 127.0.0.1 (22 Jul 1999 14:22:53 GMT)
Organization: barely any
Mime-Version: 1.0
User-Agent: Gnus/5.070084 (Pterodactyl Gnus v0.84) Emacs/20.3
NNTP-Posting-Date: 22 Jul 1999 14:22:53 GMT
Xcanpos: shelf.0/199908051801!0014688732
Newsgroups: comp.lang.ada
Date: 1999-07-22T14:22:53+00:00
List-Id: <comp.lang.ada>

Andy Askey <askeya@res.raytheon.com> writes:

> Has anyone created an Ada package with binding into the SELECT C library
> function that does I/O multiplexing?  The binding is straight forward
> but there are several macros (FD_SET, FD_CLR, ...) that have to be
> translated into Ada.

[...]

Near all modern Unixes have poll(2), which is probably much easier to
bind to than select [and if you have to handle older OS versions you
can always link in one of the poll-on-select C wrappers). poll does also
scale bigger for huge number of file descriptors and doesn't add arbitary
fd limits to your program.
If you really want to use select I would recommend using a small C interface
layer which uses the FD_* macros. 

-Andi

-- 
This is like TV. I don't like TV.