Shared memory

Corinna Vinschen
Fri Feb 28 11:41:00 GMT 2020

On Feb 27 15:35, Ken Brown wrote:
> Hi Corinna,
> I think I see how to enable FIFOs to be opened for reading multiple times,
> by using shared memory to maintain data needed by all readers.
> To this end I'm trying to imitate some of what you did in
>, and I find I'm confused about the use of
> reopen_shmem. When this is called by fhandler_socket_unix::dup, shouldn't
> the call actually be
>   fhs->reopen_shmem () ?
> It's the new fhandler that needs to open the shared memory, isn't it?  Or am
> I misunderstanding something?

You're right.  And then it's also called too early.
It should only be called after fhs->shmem_handle is valid.

I applied a patch.


Corinna Vinschen
Cygwin Maintainer
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