Re: [lwip-users] Threading Question using LWIP with TM4C1294NCPDT

[vr roriz]

>Vitor, make sure your processes are never cycled by the scheduler
otherwise you'll violate the threading requirements. I'd suggest to just
have a single thread for lwip and use a mailbox or similar to trigger
certain actions. The OS will take care that you can write into the
mailbox from any interrupt/thread/timer.

Hi Jan, I do have a "mailbox", I am using a message-passing OS. All my
interrupts just send messages to processes that execute lwIP code, all
these processes have the same priority. What do you exactly mean by "
never cycle"? The scheduling algo is priority level based, without
time-slices.
Em sex, 26 de out de 2018 às 15:39, Jan Menzel
<address@hidden> escreveu:
>
> On 26.10.2018 10:27, vr roriz wrote:
> >> and only one interrupt runs at a time and isn't interrupted by another 
> >> interrupt while using
> > lwIP - you should be safe.
> >
> > Simon, could you clarify why nesting interrupts are a problem and
> > non-nesting are not? Do you mean that, if an interrupt executes lwIP
> > code then it should not be interrupted by another?
> > My interrupts never execute lwIP code, they just trigger processes
> > that run lwIP, and all of these processes have the same priority.
>
> Vitor, make sure your processes are never cycled by the scheduler
> otherwise you'll violate the threading requirements. I'd suggest to just
> have a single thread for lwip and use a mailbox or similar to trigger
> certain actions. The OS will take care that you can write into the
> mailbox from any interrupt/thread/timer.
>
>         Jan
>
> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users