Type Alias cpdb_printer_callback 

pub type cpdb_printer_callback = Option<unsafe extern "C" fn(frontend: *mut cpdb_frontend_obj_t, printer: *mut cpdb_printer_obj_t, update: cpdb_printer_update_t)>;

Aliased Type

pub enum cpdb_printer_callback {
    None,
    Some(unsafe extern "C" fn(*mut cpdb_frontend_obj_s, *mut cpdb_printer_obj_s, u32)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut cpdb_frontend_obj_s, *mut cpdb_printer_obj_s, u32))

Some value of type T.