10.5. POSIX IPC
The evolution of the POSIX standard and associated application programming interfaces (APIs) resulted in a set of industry-standard interfaces that provide the same types of facilities as the System V IPC set: shared memory, semaphores, and message queues. They are quite similar in form and function to their System V equivalents but very different in implementation.
The POSIX implementation of all three IPC facilities is built on the notion of POSIX IPC names, which essentially look like file names but need not be actual files in a file system. This POSIX name convention provides the necessary abstraction, a file descriptor, to use the Solaris file memory mapping interface, mmap(2), on which all the POSIX IPC mechanisms are built. ...
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