Semaphores?

[Aahz Maruch]

In article <7xwv3og71o.fsf at ruckus.brouhaha.com>,
Paul Rubin  <phr-n2001 at nightsong.com> wrote:
>
>Anyone got a favorite way to implement shared memory semaphores in
>Python?  The obvious way is with an atomic test-and-set operation in
>the mmap module, but none seems to be listed in the docs.  Is there a
>preferred way to do it?  If not, should I submit a PEP to add
>something to mmap?

Do you have a cross-platform solution?
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