[erlang-questions] gen_tcp nonblocking send

Igor Ribeiro Sucupira <>
Fri May 2 22:53:40 CEST 2008

On Fri, May 2, 2008 at 7:53 AM, Per Hedeland <> wrote:
> "Igor Ribeiro Sucupira" <> wrote:
>  >
> >But, how do you deal with the situation (definitely not Daniel's case)
>  >in which you just want to NOT send the message if the buffer is full
>  >("Oh... system overload... nevermind... I don't want to make the
>  >situation worst... I'll come back when I have something
>  >important...")?  :-)
>  Well, definitely not by using O_NDELAY/O_NONBLOCK, since they do not (in
>  general) provide that functionality - they will let you send however
>  much that fits in the send buffer and leave you to deal with the rest.

I meant the "0 byte sent" case.
I have this bad habit of being too brief sometimes.  :-)


>  In fact I don't think there is a portable way to do what you're asking
>  about - i.e. basically check whether there is enough buffer space
>  without attempting to send anything.
>  I do think *this* functionality could be useful in Daniel's case though
>  - he'd probably prefer to queue and possibly eliminate also the message
>  that hit the "buffer full" condition.
>  --Per

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