Re: thread safe error number

["David Davy" <david_davy@hotmail.com>]

Thank you very very much!

I'll try it and believe that will be ok with everything. :)



>From: "bharani" <bharanis@future.futsoft.com>
>Reply-To: <bharanis@future.futsoft.com>
>To: <kernelnewbies@nl.linux.org>
>Subject: Re: thread safe error number
>Date: Wed, 3 Apr 2002 15:16:54 +0530
>
>hii,
>    We faced a similar problem when working on a Solaris system.
>    we were using a multithreaded application and the code used the 'errno'
>set by system calls to make some decision. Initially the code misbehaved
>because errno was mapped to a global variable instead of thread specific
>errno.
>    then we enabled a flag -D_REENTRANT while compiling. The code worked.
>    for code using posix threads _POSIX_C_SOURCE  >= 199506L should 
>suffice.
>
>    in linux -D_LIBC_REENTRANT should be used ... (because it uses GNU 
>libc)
>    in linux the 'errno' is mapped to a function in bits/errno.h under that
>flag
>-bharani
>
>
>
>-----Original Message-----
>From: kernelnewbies-bounce@nl.linux.org
>[mailto:kernelnewbies-bounce@nl.linux.org]On Behalf Of David Davy
>Sent: Wednesday, 3 April 2002 9:14 AM
>To: kernelnewbies@nl.linux.org
>Subject: thread safe error number
>
>
>Hi, every one:
>
>I'm working on some codes between userland and kernel space. But, I 
>couldn't
>get the correct error number via global variable 'errno' because of its
>no-thread-safe property. Any suggestions?
>
>Many thanks
>
>David
>--
>To the systems programmer, users and applications serve only to provide a
>test load.
>
>
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David
--
To the systems programmer, users and applications serve only to provide a
test load.


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