Re: POSIX.1 semaphores vs message queues

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Sat, Nov 07, 2015 at 10:55:49AM +0800, Paul Goyette wrote:
> I'd like to understand the rationale that makes POSIX sempahores a
> non-optional component of the kernel, while POSIX message queues are
> still optional.  Both seem to be related specifically to use in the
> librt real-time library.

Semaphores are used quite a lot and not only required by librt, but
also by libpthread. I'm not sure what is using message queues.

Joerg