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Re: 1.5.9-1: socket() appears NOT to be thread-safe


On Apr 14 18:42, Enzo Michelangeli wrote:
> While porting to Cygwin the Linux application "sipd"
> (http://www.sxdesign.com/index.php?page=developer&submnu=sipd ), which
> uses pthreads, I noticed that socket() calls issued concurrently by
> several threads often failed, with strerror(errno) saying "operation not
> permitted". Once I protected all the calls with mutex locks, such errors
> went away. Is Cygwin's implementation of socket() known to be
> thread-unsafe?

No.  If you can prepare a brief testcase to demonstrate the problem,
I'm happy to fix it.  Of course, patches would be most welcome.  See
below.

> P.S. I have written an implementation of the missing gethostbyname_r(),
> based on a mutex-protected call to gethostbyname(). If useful, I may
> gladly contribute the code.

Sure!  Unfortunately, that requires us to ask you for a copyright
assignment first.  See http://cygwin.com/contrib.html for details.


Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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