Re: [systemd-devel] sd_event_add_io with EPOLLPRI option

On Do, 24.08.17 10:24, Yong Li (sdliy...@gmail.com) wrote: > I found the root cause: I did not read the data in my callback function! > Note that an event source set to SD_EVENT_ON will fire continuously > unless data is read from or written to the file descriptor to reset > the mask of events

Re: [systemd-devel] sd_event_add_io with EPOLLPRI option

I found the root cause: I did not read the data in my callback function! Note that an event source set to SD_EVENT_ON will fire continuously unless data is read from or written to the file descriptor to reset the mask of events seen. 2017-08-23 17:21 GMT-07:00 Yong Li : > Hi

[systemd-devel] sd_event_add_io with EPOLLPRI option

Hi all, I want to use the sd_event_add_io API to monitor a GPIO pin status change. This pin supports intrrupts(echo both > edge). And it works using the epoll code at https://gist.github.com/jadonk/2587524: The callback function will be called if there is data change on the pin. However, the