typedef void (*lv_async_cb_t)(void*)
Type for async callback.
lv_result_t lv_async_call(lv_async_cb_t async_xcb, void *user_data)
Call an asynchronous function the next time lv_timer_handler() is run. This function is likely to return before the call actually happens!
async_xcb -- a callback which is the task itself. (the 'x' in the argument name indicates that it's not a fully generic function because it not follows the
func_name(object, callback, ...)convention)
user_data -- custom parameter