From: "Berger, Daniel" <djberge@...>
Date: 2002-06-12T00:52:07+09:00
Subject: RE: hostent extension problem - returning the ip address

> -----Original Message-----
> From: ts [mailto:decoux@moulon.inra.fr]
> Sent: Tuesday, June 11, 2002 10:26 AM
> To: ruby-talk@ruby-lang.org
> Cc: ruby-talk@ruby-lang.org
> Subject: Re: hostent extension problem - returning the ip address
> 
> 
> >>>>> "S" == Sunblade  <djberge@qwest.com> writes:
> 
> S>    Data_Wrap_Struct(cHost,0,host_free,hp);
> [...]
> S>    hp = gethostbyname(h);
> S>    pptr = hp->h_addr_list;
> S>    Data_Wrap_Struct(cHost,0,host_free,pptr); /* problem here? */
> 
>  Why do you use Data_Wrap_Struct() ?
> 
>  On Solaris 8, for gethostbyname(3)
> 
>      The functions gethostbyname(), gethostbyaddr(), and  gethos-
>      tent()  use static storage that is reused in each call, mak-
>                  ^^^^^^^^^^^^^^
>      ing these functions unsafe for use in multi-threaded  appli-
>      cations.
> 
> 
> 
> Guy Decoux

I was guessing, actually - I knew that didn't work, I merely put it there as
an "alert" of sorts to point you to the area where I'm having trouble.

Also, the eventual plan is to use the thread-safe versions provided by
individual vendors, e.g. gethostbyname_r() on Solaris.  I thought I would
start with a  basic version and work my way up from there. :)

Regards,

Dan