Re: [OT] Two sockets questions

["David C. Hoos" <david.c.hoos.sr@ada95.com>]

"Stephen Leake" <Stephe.Leake@nasa.gov> wrote in message
news:uk7d2lekh.fsf@nasa.gov...
> Samuel Tardieu <sam@rfc1149.net> writes:
>
> > >>>>> "Jano" == Jano  <nono@celes.unizar.es> writes:
> >
> > Jano> Is there a way of performing a connect without blocking on it? I
> > Jano> suspect not... and if not in Ada, by other means?
> >
> > Sure! I'll describe the process in C, I do not know whether
> > GNAT.Sockets allows you to do all those steps:
> >
> >   1) Create your socket
> >   2) Make it non-blocking
> >   3) connect() will return immediately with either 0 (success), -1
> >      with errno set to EINPROGRESS or -1 with another error (real
> >      error).
> >   4) If the result was -1/EINPROGRESS, do a select() on the socket for
> >      writing. When it tells you that you can write, write() 0 bytes. If
> >      there is no error (write() returns 0), then you are
> >      connected. Otherwise, you will get an error (typically
> >      -1/ENOTCONN).
>
> This is not C. It is English. Hm, I suppose "EINPROGRESS" could be a C
> macro, but it could equally well be an Ada named number.
As Sam stated, EINPROGRESS is an errno value set by the connect()
function under some conditions.
>
> I suspect Jano is wondering how to accomplish step 2; exactly what
> function (C or Ada) should be called, with what parameters?
>
> -- 
> -- Stephe
> _______________________________________________
> comp.lang.ada mailing list
> comp.lang.ada@ada.eu.org
> http://ada.eu.org/mailman/listinfo/comp.lang.ada
>