[fpc-pascal] Re: Odyssey: SSockets and Threads.

silvioprog silvioprog at gmail.com
Fri Apr 26 18:48:20 CEST 2013


2013/4/26 Ludo Brands <ludo.brands at free.fr>

> On 04/26/2013 08:58 AM, Michael Van Canneyt wrote:
> > On Thu, 25 Apr 2013, silvioprog wrote:
> >
> >> I do not know where it would be used, it's just an observation hehe...
> >
> > Yes, but the above is what I mean with 'it does not make much sense'.
> >
> > I can easily add this - in fact I will do so, but with multiple sockets
> > it is better to combine the waitfordata()
> >
>
> In blocking mode the select is vital if you want to do simultaneous read
> and write on the same socket in the same thread. Otherwise you are
> simply blocking the thread in a recv when nothing comes in or in a send
> when the socket buffer is not empty. Note that select also returns when
> an exception occurs.
>
> Ludo


Exactly. In my small sample, when no buffer is received from server, the
process stays blocked on:

https://bitbucket.org/silvioprog/tcpipcomp/src/f42be14db1e74d750fa88d6b4554b209145ff589/src/tcpipclient.pas?at=master#cl-189

-- 
Silvio Cl├ęcio
My public projects - github.com/silvioprog
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