On 24 October 2011 22:03, Greg Ewing <greg.ew...@canterbury.ac.nz> wrote: > mark florisson wrote: >> >> These will by default not lock for operations to allow >> e.g. one thread to iterate over the list and another thread to index >> it without lock contention and other general overhead. > > I don't think that's safe. You can't say "I'm not modifying > this, so I don't need to lock it" because there may be another > thread that *is* in the midst of modifying it.
Oh yes you're definitely right, that was silly of me. I suppose every operation needs to lock. This can still be useful though, to allow more fine-grained parallelism. Then it would be more efficient to use arrays or memoryviews with acquisition counted objects, and the dicts/lists/tuples etc for cases where you just need more fine-grained locking and can deal with that overhead. > -- > Greg > _______________________________________________ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel > _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
