Function transmission_sys::tr_torrentSetMetadataCallback

pub unsafe extern "C" fn tr_torrentSetMetadataCallback(
    tor: *mut tr_torrent,
    func: tr_torrent_metadata_func,
    user_data: *mut c_void
)

Register to be notified whenever a torrent changes from having incomplete metadata to having complete metadata. This happens when a magnet link finishes downloading metadata from its peers.