From: Xavier Leroy <xavier.leroy@inria.fr>
To: Max Kirillov <max630@mail.ru>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Unix.file_descr -> int ???
Date: Tue, 11 Jun 2002 17:45:27 +0200 [thread overview]
Message-ID: <20020611174527.A14450@pauillac.inria.fr> (raw)
In-Reply-To: <20020611213158.A680@max.home>; from max630@mail.ru on Tue, Jun 11, 2002 at 09:31:59PM +0700
> Suddently, I'm unable to recover file descriptor from Unix's
> file_descr. At least, Unix module does not contain any
> function doing that and the type is abstract.
> What was a reason for the limitaion?
Well, because file descriptors are an abstract data type.
What makes you think that they are integers? None of the integer
operations make any sense on file descriptors, e.g. adding or
multiplying two file descriptors.
It is true that under Unix, file descriptors happen to be implemented
as integers, but that's purely accidental. E.g. under Windows,
Unix.file_descr is not implemented by integers.
> Is there some way (apart from hacking ocaml) to do that?
Within well-typed code, no. With typing hacks, yes. But what would
you want to do this?
- Xavier Leroy
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next prev parent reply other threads:[~2002-06-11 15:45 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-11 14:31 Max Kirillov
2002-06-11 15:40 ` Bruno.Verlyck
2002-06-11 15:45 ` Xavier Leroy [this message]
2002-06-11 19:26 ` Max Kirillov
2002-06-11 23:12 ` Berke Durak
2002-06-12 0:10 ` Jacques Garrigue
2002-06-12 7:49 ` Ocaml debugging (Was [Caml-list] Unix.file_descr -> int ???) Mattias Waldau
2002-06-12 11:17 ` Pixel
2002-06-12 8:08 ` [Caml-list] Unix.file_descr -> int ??? Xavier Leroy
2002-06-12 7:42 ` Basile STARYNKEVITCH
2002-06-12 8:21 ` Xavier Leroy
2002-06-12 16:06 ` Max Kirillov
2002-06-13 10:24 ` Jean-Marc Eber
2002-06-12 13:09 ` Bruno.Verlyck
2002-06-12 15:44 ` John Max Skaller
2002-06-12 9:53 Damien Doligez
2002-06-12 9:57 ` Jacques Garrigue
2002-06-12 11:04 ` Jacques Garrigue
2002-06-18 13:38 Alessandro Baretta
[not found] ` <000101c21705$d9f23640$0501a8c0@lexifi01>
2002-06-18 22:41 ` Alessandro Baretta
2002-06-19 16:22 ` John Max Skaller
2002-06-20 11:23 ` Xavier Leroy
2002-06-20 11:52 ` Markus Mottl
2002-06-20 13:14 ` Alessandro Baretta
2002-06-20 13:23 ` Stefano Lanzavecchia
2002-06-20 16:22 ` Alessandro Baretta
2002-06-20 14:42 ` YAMAGATA yoriyuki
2002-06-20 12:24 Ohad Rodeh
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