Sergio Saez UPVLC ssaez@disca.upv.es 2002 OCERA Consortium Real-Time, POSIX, communication, IPC RTLinux Ismael Ripoll UPVLC iripoll@disca.upv.es UNIX systems offers several possibilities for interprocess communication: signals, pipes and fifos, shared memory, sockets, etc. In RTLinux, the most flexible one is shared memory, but the programmer has to use alternative synchronisation mechanism to build a safe communication mechanism between process or threads. On the other hand, signals and pipes lack certain flexibility to establish communication channels between process.