XSI was supposed to be available to have a posix-like portable shared memory semantics for systems with only system v shared memory. However lack of time and portability issues froze the development. Maybe some class (xsi_shared_memory) is ready to be public, just like we have windows_shared_memory. It shouldn't be hard to implement managed_xsi_shared_memory. If there is interest in them I could add them and try posix emulation on top of XSI later.
Thanks for your quick reply, Ion. Yes, we are interested in both xsi_shared_memory and managed_xsi_shared_memory. I am also willing to help with the development if that would be helpful. Could you give me an idea of when a patch could be available for both of these so that I can decide whether we need to develop a workaround? Thanks again. - Daniel