[Python-ideas] An error in multiprocessing on MacOSX?
shibturn at gmail.com
Tue Nov 27 23:53:52 CET 2012
On 27/11/2012 9:37pm, Sturla Molden wrote:
> I would suggest to use a piece of shared memory and atomic compare-and-swap.
> Shared memory can be pickled (e.g. take a look at what I have on github).
On unix (without assuming a recent gcc) there isn't any cross platform
way of doing compare-and-swap or other atomic operations. And even if
there were, you need to worry about busy-waiting.
One could also consider using a process-shared semaphore or mutex
allocated from shared memory, but that does not seem to be available on
A simple (but wasteful) alternative would be to build a lock/semaphore
from a pipe: write to release and read to acquire. Then you can use
normal fd passing.
More information about the Python-ideas