Re: [RTnet-users] select_rt in userspace?

[Hans-Peter B. <Han...@is...>]

Hello Chris,

> What's missing here is foremost a complete and working implementation of=
=20
> select_rt at all. What you find in the SVN for kernel space is=20
> experimental and - AFAIK - not functional. But maybe HaPe can comment on

the implementation is currently more a proof of concept than for production=
al use.

http://www.rts.uni-hannover.de/rtnet/lxr/source/rtai_rtdm/rtdm.c#L686


The select_rt() itself works, but it is not (yet) compliant with the select=
() of libc:

 * only "readfds" is supported
 * timeout is not supported
 * only one select_rt call per socket is supported at the same time
 * ... sorry, can't recall right now. =3D8]

For the full functionality, a list of semaphores needs to be handled by a s=
ocket rather than a single pointer to a simple semaphore like now.

http://www.rts.uni-hannover.de/rtnet/lxr/source/stack/include/rtnet_socket.=
h#L58

The problem currently is, that I am buried in other work. =3D8]


Best regards, Hans-Peter
--=20
(=B0< Hans-Peter Bock, Dipl.-Ing., http://www.isw.uni-stuttgart.de/ >=B0)
(/) ISW - Universit=E4t Stuttgart, Seidenstra=DFe 36, 70174 Stuttgart (\)