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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: problems with interfacing c
Date: Fri, 21 Jan 2011 01:46:24 +0100
Organization: Ada @ Home
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Date: 2011-01-21T01:46:24+01:00
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Le Fri, 21 Jan 2011 00:03:22 +0100, Dmitry A. Kazakov  =

<mailbox@dmitry-kazakov.de> a =C3=A9crit:
>> Some body do, for some kind of raw IO. Just that this may be more  =

>> oftenly
>> something like
>>     Character'Read (Standard_Input), C);
>
> That the point, when reading characters that suggests some character  =

> stream
> oriented protocol. Dealing with such protocols one would never read 10=
0K  =

> in
> one chunk. Because if the client does something wrong that would deadl=
ock
> forever.
This could block for a single character as much. The only way to not blo=
ck  =

would be either to test before read; this implies to read an item at a  =

time, before the condition must be checked before each item is read (so =
a  =

loop), or else indeed to use asynchronous IO as you suggested later. Wit=
h  =

the latter choice, buffered IO is OK. You may use Overlapped IO in  =

Windows, alternatively, there are nonblocking socket IO available (retur=
ns  =

WSAEWOULDBLOCK error if a read access would block). Don't know about POS=
IX  =

(oops).

(I feel to remember there was a talk here about buffered IO, I cannot  =

remember the thread's title)

-- =

Si les chats miaulent et font autant de vocalises bizarres, c=E2=80=99es=
t pas pour  =

les chiens.

=E2=80=9CI am fluent in ASCII=E2=80=9D [Warren 2010]