Python 2.6, multiprocessing module and BSD

[Philip Semanchuk]

On Oct 21, 2008, at 6:45 PM, YouCanCallMeAl at gmail.com wrote:

> It seems that the multiprocessing module in 2.6 is broken for *BSD;
> I've seen issue 3770 regarding this. I'm curious if there are more
> details on this issue since the posts in 3770 were a bit unclear. For
> example, one post claimed that the problem was that sem_open isn't
> implemented in *BSD, but it is available on FreeBSD 7 (I checked). I'd
> be willing to help get this working if someone could point me in the
> right direction.


Hi Al,
I don't know anything about the multiprocessing module, but I have  
some recent experience with the semaphores on FreeBSD 6 & 7 as a  
result of implementing my posix_ipc module.

Since you mentioned sem_open, I assume you're talking about POSIX  
semaphores, rather than System V semaphores, yes? On FreeBSD 6 & 7  
sem_open exists and works, but support for said semaphores are listed  
as "very experimental". I experienced a problem that looked like a bug  
to me, and a rather big one at that. There's more detail here (scroll  
down to the part about FreeBSD 6/7) including a link to the bug report  
I filed against the FreeBSD kernel:

http://semanchuk.com/philip/posix_ipc/#platforms


HTH
Philip