Semaphores?

[Paul Rubin]

aahz at panix.com (Aahz Maruch) writes:
> >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?

There's no totally portable way to do it (it's not part of C
semantics) but there should be reasonable implementations possible on
all modern platforms.