Well C doesn't have closures so `.cdecl` cannot support it either. Usually a
`void* env` parameter is used in C so that you can pass user data to callbacks.
But in this library's `event.h` it's declared as:
typedef void (*lv_event_cb_t)(lv_event_t * e);
/**********************
* GLOBAL PROTOTYPES
**********************/
void _lv_event_push(lv_event_t * e);
void _lv_event_pop(lv_event_t * e);
lv_res_t lv_event_send(lv_event_list_t * list, lv_event_t * e, bool
preprocess);
void lv_event_add(lv_event_list_t * list, lv_event_cb_t cb, lv_event_code_t
filter, void * user_data);
Run
Even though `lv_event_add` has this `void* user_data` it is absent in the
declaration of `lv_event_cb_t`. You should aks on the project's issue tracker
of why that is, looks like a big design mistake to me but what do I know.
