oldhand cygwinner needed: RE: __errno_location() like functionality in Cygwin

Fri May 4 01:31:00 GMT 2001

----- Original Message -----
From: "Dmitry Timoshkov" <dmitry@sloboda.ru>
To: "Robert Collins" <robert.collins@itdomain.com.au>
Cc: <cygwin@cygwin.com>
Sent: Friday, May 04, 2001 7:23 PM
Subject: Re: oldhand cygwinner needed: RE: __errno_location() like
functionality in Cygwin
> First of all, thank you very much for your reply.
>> "Robert Collins" <robert.collins@itdomain.com.au> wrote:
>> [...]
>> I'm not writing a threaded application, I'm going to port an existing
one,
> which contains a lot of lines of code. Moreover, interoperability with
the
> existing application is one of the requirements: i.e. bug fixes and
improvements
> from the one side should be easy applied to another one. That
application
> uses only those libc calls which are supposedly thread safe, and has
no
> any problems running in Linux. Having thread local errno variable is
enough.
Fair enough.
> > > The second method requires to assign _impure_ptr to the
> > > pointer of thread local reent
> > > structrure before EVERY libc call. Am I understand it correctly?
> >
> > Uhmm, I have no idea what you mean here. You should have _no_ static
> > variables that are unguarded (ie don't use mutexs) and all global
> > structs should have their access guarded.
>> From the info regarding reentrancy in libc:

Which libc? And the internal programmers guide or the users guide?
Rob
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