Integrating edge events into our custom event loop in v2.x

[mfide]

Hello,

In v1.x, We used to use gpiod_line_event_get_fd() and gpiod_line_event_read_fd() apis to integrate GPIO edge events into our custom event loop framework (like libuv). And they were perfectly working fine for us.

What are the equivalent apis to get edge event fd and also acknowledge the event in v2.x ?

gpiod_line_request_wait_edge_events() and gpiod_line_request_read_edge_events() work fine in v2.x, but I cannot use them to integrate it into our event loop (basically no fd).

Thanks.

[Ablu]

https://libgpiod.readthedocs.io/en/latest/core_line_request.html#_CPPv425gpiod_line_request_get_fdP18gpiod_line_request

and

https://libgpiod.readthedocs.io/en/latest/core_chips.html#_CPPv417gpiod_chip_get_fdP10gpiod_chip

should hopefully give you what you need?

Also see: https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/tree/examples/async_watch_line_value.c#n117

[mfide]

Thanks @Ablu. async_watch_line_value.c helped a lot.
I used gpiod_line_request_get_fd() to get fd and gpiod_line_request_read_edge_events() to acknowledge the event and all worked nicely in v2.x.