Lionel Perrin wrote:
>
> > > - Will this shared memory be accessible to non rt-task ?
> > > - What's the simplest way to share information with a non rt-task ?
> >
> > Shared memory are also accessible to non-rt tasks. Since user-space
> > realtime and non-realtime threads from the same process reside in the
> > same address space, the simplest way to share information from rt to
> > non-rt tasks is to create them as threads of the same process.
> >
> Ok, but I figure out that it's possible to share memory between
> processes ? (rt and non rt?)
> For the moment, i focus on sharing between two rt tasks, but in vain :(
> I still have a ftruncate error (EBADF) when i launch two rt processes...
> I explain :
> I've tried the attached program. I've added a sleep(1) between mmap and
> munmap. I launch this appli twice with
> >> shm_test &
> >> shm_test &
> For the second one, I got "ftruncate: Invalid argument". Am I the only
> one to have this problem ?
No, these errors were due to a few fixes in trunk that had not been
backported to the 2.1 branch. It should now be fixed in the repository.
--
Gilles Chanteperdrix.
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