IPC,FORK on Windows 2008 Server

Corinna Vinschen corinna-cygwin@cygwin.com
Tue Mar 31 15:16:00 GMT 2009


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 think it would tough to modify the shmget/shmat calls to mmap for my
> application.

If you need to share memory only with forked processes, it's a much
simpler solution.

> I believe V 1.7 is a Beta release, Can I know when the Official release will be?

It's all in the announcement I referred you to.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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