Francisco Molina 81c5d5dbcc sys/event/timeout: split xtimer, ztimer backends, don't force usec ... This PR makes `event_timeout` and `event_timeout_ztimer` two distinct pseudomodules, where the only api difference is in the init function. If only `event_timeout_ztimer` is selected then no default ZTIMER backend is selected and the old init function is not implemented. If only `event_timeout` is selected then `xtimer` is used unless `ztimer_usec` is included. In which case the `xtimer` wrapper on top of `ztimer` is used and `xtimer` is not directly selected. This allows for the legacy api to be supported with `ztimer_usec` as a drop-in replacement. If `event_timeout` and `event_timeut_ztimer` are selected then `event_timeout` SRC file is excluded from compilation.		2021-11-17 10:15:11 +01:00
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callback.h	add copyrights from IOTPUSH project	2019-05-02 12:09:37 +02:00
periodic.h	sys/event: add periodic event	2021-06-03 17:53:44 +02:00
thread.h	sys/event: Allow shared thread for multiple queues	2020-12-03 15:28:35 +01:00
timeout.h	sys/event/timeout: split xtimer, ztimer backends, don't force usec	2021-11-17 10:15:11 +01:00