"Phillip J. Eby" <[EMAIL PROTECTED]> wrote: > > >But I need to clean up workspace when a class (not object) is > >deallocated. I can't easily use attributes, as people suggested, > >because there is no anonymous storage built-in type. I could subvert > >one of the existing storage types (buffer, string etc.), but that is > >unclean. And I could write one, but that is excessive. > > > >So far, I have been unable to track down how to get something called > >when a class is destroyed. The obvious attempts all didn't work, in > >a variety of ways. Surely there must be a method? This could be in > >either Python or C. > > Have you tried a PyCObject? This is pretty much what they're for:
Oh, yes, I use them in several places, but they don't really help. Their first problem is that they take a 'void *' and not a request for space, so I have to allocate and deallocate the space manually. Now, I could add a destructor to each of them and do that, but it isn't really much prettier than subverting one of the semi-generic storage types for an improper purpose! It would be a heck of a lot cleaner to deallocate all of my space in exactly the converse way that I allocate and initialise it. It would also all me to collect and log statistics, should I so choose. This could be VERY useful for tuning! I haven't done that, yet, but might well do so. All in all, what I need is some way to get a callback when a class object is destroyed. Well, actually, any time from its last use for object work and the time that its space is reclaimed - I don't need any more precise time than that. I suppose that I could add a C object as an attribute that points to a block of memory that contains copies of all my workspace pointers, and use the object deallocator to clean up. If all else fails, I will try that, but it seems a hell of a long way round for what I would have thought was a basic requirement. Regards, Nick Maclaren, University of Cambridge Computing Service, New Museums Site, Pembroke Street, Cambridge CB2 3QH, England. Email: [EMAIL PROTECTED] Tel.: +44 1223 334761 Fax: +44 1223 334679 _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
