OSE is a real-time operating system from ENEA. One of the key features in OSE is the signaling interprocess communication (IPC) system. ENEA has also released a similar IPC system called LINX, that is platform independent.
For the purpose of running OSE programs under Linux, I have evaluated two software libraries that are designed to simulate the OSE programming environment. The libraries in question are called SoftApi and OSEPL, where SoftApi was developed by RealTime Logic and modified by me to utilize LINX for interprocess communication, and OSEPL was designed by me to overcome some of the limitations in SoftApi. Neither of those libraries proved to be suited for production systems, but it is deemed possible to implement a similar library that is.