Re: Shared memory

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

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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
> fhandler_socket_unix.cc, 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.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer

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