Re: [OT] Two sockets questions

[Jano <nono@celes.unizar.es>]

Samuel Tardieu dice...
> >>>>> "Jano" == Jano  <nono@celes.unizar.es> writes:
> 
> Jano> A idea that comes to me: If I do a read for 0 bytes, will occur
> Jano> the same? I mean, if connection is alive, nothing happens, and
> Jano> if it's dead, error...
> 
> I do not understand your question.

I mean: I try to read a 0 length vector. If the connection is okay, 
nothing happens. If the other end has shutdown and there is no remaining 
data to be read, some error is returned (even trying to read 0 bytes).

I see in the Gnat.Sockets comments that a read in a closed socket sets 
Last to -1. However, that option is not valid: If you try to read a 0-
length array from an alive connection, "Operation would block" is raised 
anyway.

(Now I wonder if doing so in a non-blocking socket would have some 
effect. I suppose no, and without blocking or exceptions. Kinda 
amusing).

-- 
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Jano
402450.at.cepsz.unizar.es
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