[lwip-devel] Re: [bug #26397] SLIP polling support

[Simon Kallweit]

Simon Goldschmidt wrote:
> Follow-up Comment #8, bug #26397 (project lwip):
>
> > Actually ppp.c uses sio_read() in blocking mode. It uses 
> > sio_read_abort() to cancel the blocking sio_read() calls.
>
> So the SLIP-polling patch wouldn't work, either, since both sio_read and
> sio_recv are blocking, which means the function sio_poll would block, too!

No, it wouldn't. I would first like to fix the sio API and then see how 
to best implement SLIP polling.

> In that case, there's no alternative to a new function, I guess. I'd be OK
> with sio_tryread() or something like that (try- to stay with the naming
> convention we already have - e.g. in sys_mbox_tryfetch).

Well, sio_tryread() would be the same as sio_read() but non-blocking? We 
could also add a function to peek at how many characters are waiting in 
line. But sio_tryread() sounds fine to me.

Shall I write a patch for sio.h?