SHMOP (SYSV) - really shmat(2)

[Hokey]

Robert, The SysV semaphore system implements a *stack* instead of a *queue*.

Should I assume you believe that behavior to be a *feature*?  How can it
possibly be useful in a multiuser environment?

Granted, this is a problem in the implementation of semaphores, but it has
not been fixed, and semaphores *still* provide a mutex method which is too
low-level and expensive to be useful for implementing shared database locks
in non-record oriented databases.

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