This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: IPC,FORK on Windows 2008 Server
On Mar 31 14:08, Corinna Vinschen wrote:
> On Mar 31 17:11, Yarlagadda Suresh wrote:
> > Hi,
> >
> > I am using shmget()/shmat() methods for getting the shared memory.
> >
> > I had tried running the same program which is given in the previous
> > mention thread, the results are same as mentioned over there.
>
> I just tried that testcase with Cygwin 1.7 and it appears to work most
> of the time. Unfortunately I can still reproduce the problem once per
> about 30 forks.
>
> I'll look into fixing this for Cygwin 1.7. However, please note that
> there is no *really* foolproof method to fix this due to the way fork
> has to be implemented using Win32 calls. I can only make it much more
> unlikely than today.
I applied a patch to Cygwin which allocates the shmat() shared memory
regions top-down, same as the mmap() regions. This should make the
observed effect at fork() pretty unlikely. The patch will be in the
next Cygwin 1.7.0 test release (in a couple of days).
Thanks for the report,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/