= UDP/Datagram socket support =

== Analysis of support in underlying implementations ==

|| '''Implementation''' || method || Support for time-out/efficient waiting ||
|| '''SBCL''' || Yes (BSD sockets) || Yes, select() ||
|| '''CLISP''' || Yes, through raw sockets || SOCKET:SOCKET-STATUS works for raw sockets ||
|| '''CMUCL''' || Yes (unix module; BSD socket API) || Yes, select() ||
|| '''Scieneer''' || Probably (stems from CMU) || Yes, probably select() ||
|| '''Allegro''' || Yes || Yes, mp:wait-for-input-available [input only :-( ] ||
|| '''OpenMCL''' || Yes (Same API as Allegro) || No (or select and FFI) ||
|| '''LispWorks''' || merged from LispWorks-UDP (non-official) || select / WSAEventSelect ||
|| '''ECL''' || Yes (BSD sockets) || Yes, BSD sockets through clines ||
|| '''ABCL''' || Yes, same way as stream and server sockets: with 'FFI' || Yes, through Selectors, Channels etc ||
|| '''MCL''' || No || Kqueue ||