Subj : Re: posix semaphores on AIX
To   : comp.programming.threads
From : Dragan Cvetkovic
Date : Fri Jul 29 2005 11:01 am

"jpknott@gmail.com" <jpknott@gmail.com> writes:

> Are posix semaphores supported on AIX (5.1 - 5.2)?
>
> I am trying to port some thread-aware code which runs fine on linux and
> Solaris.   However, on AIX when I call sem_open I am getting -1, with
> errno set to ENOSYS.
>
> It seems rather incredible that posix semaphores are simply not
> implemented, so I am guessing that I am either linking incorrectly, or
> perhaps not defining some critical macro when compiling.

Well, POSIX semaphores are a relativelly new feature. As far as I can see,
sem_open() is declared in /usr/include/semaphore.h, as they are supposed to
be, but there is also a comment in that file stating:

/* THIS FILE is for conformance to IEEE POSIX 1003.1c.
 * It describes required symbols for the Realtime option
 * which is NOT SUPPORTED.
 */

So, I guess, no sem_open() on AIX 5.2. 

Can't you port that to System V semaphores?

Dragan

-- 
Dragan Cvetkovic, 

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

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