I'm little bit disappointed by fact that almost every text on Unix IPC (including this one) gives too much emphasis to System V IPC primitives, with their one g

I'm little bit disappointed by fact that almost every text on Unix IPC (including this one) gives too much emphasis to System V IPC primitives, with their one global 32-bit namespace for everything and other brain damage. Anything that you can do with SysV IPC can be done better using sockets or mmap-based shared memory (or POSIX semaphores, which are by the way implemented by mmaping one page of shared memory, at least on Linux).