Path: utzoo!utgpu!watmath!clyde!mcdchg!chinet!les
From: les@chinet.chi.il.us (Leslie Mikesell)
Newsgroups: comp.unix.questions
Subject: Re: Shared Libraries -- experiences etc.
Message-ID: <7617@chinet.chi.il.us>
Date: 3 Feb 89 23:21:57 GMT
References: <81584@felix.UUCP> <3747@ingr.com>
Reply-To: les@chinet.chi.il.us (Leslie Mikesell)
Organization: Chinet - Public Access Unix
Lines: 15

In article <3747@ingr.com> crossgl@ingr.UUCP (Gordon Cross) writes:
>In article <81584@felix.UUCP> martin@felix.UUCP (Martin McKendry) writes:

>>    o) Are semaphores the only appropriate technique for implementing
>>       mutual exclusion on small objects?  For example, if I had a
>>       large number (say, 2000) of objects that were small (say, 20 bytes),
>>       and I wanted to put locks on each object.

I'd like to know about this also.  My first thought would be to map
the objects into a file and use region locks on the file even if the
object only exists in shared memory. Can anyone give details about the
efficiency of the various IPC mechanisms?  


Les Mikesell