Agustina Arzille, on Wed 20 Apr 2016 11:52:25 -0300, wrote:
> The former is not as easy to implement given its semantics. However, the
> technique used to create a shared semaphore can be reused to implement
> sysv semaphores and message queues (both POSIX and sysv).

sysv semaphores (sem_get) and message queues are less important, since
much less used in practice.

Samuel

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