On Nov 18, 2009, at 5:38 AM, Nick Coghlan <ncogh...@gmail.com> wrote:
Antoine Pitrou wrote:
Guido van Rossum <guido <at> python.org> writes:
Will locks be interruptible with ^C? That is an oft-requested
feature
which also wasn't supported at that time; what's the situation
nowadays?
They still aren't interruptible. From what I can read it may be
possible to make
them interruptible in the POSIX semaphore-based implementation, not
in the POSIX
condition variable-based implementation (which is used as a
fallback when POSIX
semaphores are not available, but I don't know whether this
fallback is still
useful).
I'm pretty sure at least some variants of *BSD still don't have OS
level
semaphores - their lack is the reason multiprocessing doesn't
necessarily work everywhere that the threading module works (since mp
needs semaphores in order to work its magic).
Jesse would probably know the gory details.
Cheers,
Nick.
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.
I wouldn't recommend using them for threading right now, there's an
assumption that threading "just works" unlike multiprocessing, which
people understand has caveats.
Jesse
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