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From: "Jeffrey R. Carter" <jrcarter@acm.org>
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Subject: Re: Arguments for single-mutex-exclusion on protected types (Was:
 Does Ada tasking profit from multi-core cpus?)
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Jacob Sparre Andersen wrote:
> 
> Isn't that the most efficient implementation on a POSIX system?

I don't know. I mentioned it simply because it clearly prevents parallel 
function calls on multiprocessor systems, and because it seems to 
prevent the use of the ceiling locking policy on monoprocessors.

-- 
Jeff Carter
"I like it when the support group complains that they have
insufficient data on mean time to repair bugs in Ada software."
Robert I. Eachus
91