Re: [lwip-devel] wrap rtos queue in lwip socket

[Kieran Mansley]

On Mon, 2008-09-01 at 16:02 +0200, Piero 74 wrote:
> FOR LWIP - RTOS users
> 
> Hi all.
> 
> I have a problem and an idea to solve it. I want discuss here about
> them.
> 
> PROBLEM:
> i worked with lwip over an rtos.
> i have a task which can get data from network - i.e. a tcp socket - or
> from other task troght rtos queue.
> i want to work without blocking call, and i want short latency for
> data management on this task.
> now i dit something like this:

I don't really understand your proposed solution, but here are a number
of ways you could solve your problem:

1) Don't use the sockets API - if you use the raw API you'll get
callbacks when data become available.

2) Have more than one thread/task.  Thread "A" reads packets from the
network and writes them to a rtos queue.  Thread "B" reads both this new
rtos queue and the one you already have, and acts appropriately.

3) Like 2, but Thread "A" reads your rtos queue and writes the data to a
loopback socket.  Thread "B" then uses select() to read both sources.

4) Depending on what else you have to do, just poll the socket and the
rtos queue.

Kieran