Hi Drake, 

Hmm; if we are talking about the System V IPC stuff like shmat, I don't
have experience with it on Cygwin. 

The Cygwin "Implementation Notes" [1] say this: 

_The XSI IPC functions semctl, semget, semop, shmat, shmctl, shmdt,
shmget, msgctl, msgget, msgrcv and msgsnd are ONLY AVAILABLE WHEN
CYGSERVER IS RUNNING._ 

Bundling cygserver wtih Cygnal, if that's what it takes, is not out of
the question; I just haven't tried it, so I don't know exactly what is
involved; I don't know the licensing ramifications either. (If an
application which uses Cygwin DLL's requires cygserver, is it still
LGPL? Probably.) 

Another important thing to consider is whether a cygserver bundled with
your Cygnal program would conflict with a Cygwin user's existing
cygserver. 

On 14.10.2016 15:03, Drake, Richard R wrote: 

> Hello, 
> 
> Cygnal is a really neat concept! Does it work with applications that want to use shared memory (shmem)? 
> 
> Thanks, 
> 
> -rich

 

Links:
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[1] https://cygwin.com/cygwin-api/std-notes.html