Function unqlite::ffi::unqlite_kv_cursor_data_callback

pub unsafe extern "C" fn unqlite_kv_cursor_data_callback(
    pCursor: *mut unqlite_kv_cursor, 
    xConsumer: Option<unsafe extern "C" fn(arg1: *const c_void, arg2: c_uint, arg3: *mut c_void) -> c_int>, 
    pUserData: *mut c_void
) -> c_int