Please always state in your review, whether you think the library should be accepted as a Boost library! Yes - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? A glance at the docs and a couple of attempts at the tests. - Are you knowledgeable about the problem domain? The QNX OS offers many techniques for IPC - shared memory is just one of those. I use it a lot, but normally for POD (Plain Old Data) and simple non-virtual classes. I have learned the hard way over the years about its limitations e.g. no pointers, no virtual classes etc. I look forward to being able to evaluate this library in more depth as time permits. - Did you try to use the library? With what compiler? Did you have any problems? I attempted to build and test on QNX Neutrino v6.3.0 (aka QNX6) using the gcc 3.3.5 compiler and Dinkumware C++ std library. There were some compile failures and test failures, but nothing that could not be fixed given time. The QNX supplied GNU C++ std library fails miserably because the wide character support is disabled. - What is your evaluation of the design? Generally good. QNX does not currently support memory mapped files although it does allow the creation of regular files (but not directories) under /dev/shmem. Memory mapped files are being implemented and are promised for a future release. - What is your evaluation of the documentation? Others have said it all. - What is your evaluation of the potential usefulness of the library? The core classes for managing the memory space save a lot of C code and go way beyond the simple helper classes I have written. Synchronisation primitives are pretty much mandatory in shared memory applications and I welcome these. I look forward to evaluating the use of STL classes and being able to treat the shared memory dynamically. A number of the extensions that you propose in the form of message passing queues between processes already exist in the QNX kernel, but I can see the potential for less fortunate :-) operating systems. Jim Douglas