[Python-Dev] Add an optional timeout to lock operations (original) (raw)

Jesse Noller jnoller at gmail.com
Wed Nov 18 15:27:36 CET 2009

On Wed, Nov 18, 2009 at 8:50 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:

Jesse Noller <jnoller gmail.com> writes:

Nick is right, many of the BSDs and FreeBSD up until fairly recently did not have named shared semaphore support. Still yet, the behavior is broken on some OSes such as OS X which you have to work around. The core locking support only uses anonymous semaphores (they don't need to be shared accross processes obviously). Regards Antoine.

That's what I get for replying from an iphone over morning coffee. See also http://semanchuk.com/philip/sysv_ipc/ for Philip Semanchuk semaphore/IPC work as well.

Given both multiprocessing and Philip's work are concerned about the shared aspects, I think you're right - FBSD and others support the posix semaphores for non-ipc stuff ok AFAIK (recent benchmark http://www.ioremap.net/node/216).

jesse

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