Re: [libgpiod] - fast writing while waiting for edge events

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Tue, Dec 12, 2023 at 10:55 AM Mathias Dobler <mathias.dob@xxxxxxxxx> wrote:
>
> Hello,
> From reading other conversations I've learned that it's not a good
> idea to have more than 1 thread accessing libgpiod objects. But this
> raises the question of how to react to events and let reads/writes
> through as quickly as possible at the same time. I have already played
> around with the file descriptor of the request object to interrupt the
> wait for edge events, but this solution is not good because it comes
> at the expense of responsiveness to events, and requires complicated
> synchronization.
> How bad would it be to have 1 thread waiting for events and 1 other
> thread reading/writing?
>
> Regards,
> Mathias
>

Are you bitbanging? It totally sounds like bitbanging. Have you
considered writing a kernel driver for whatever you're doing?

Bart