On Sat, Sep 25, 2010 at 9:20 AM, Tim Peters <tim.peters at gmail.com> wrote: [MvL] >> I think it would be possible to have two versions of >> _PyGC_REFS_UNTRACKED, one being, say, -5. >> _PyGC_REFS_UNTRACKED_AND_KEEP_IT_THAT_WAY would be what you get >> when you call PyObject_GC_UnTrack; the code to do automatic >> tracking/untracking based on contents would use some other >> new API (which would be non-public in 2.7.x). > > Looks like a promising idea! gcmodule.c's IS_TRACKED macro would have > to change to check both states, and likewise the debug assert in > visit_reachable(). Given the intent is to restore the 2.6 state, perhaps it is the "UNTRACK_ALLOW_RETRACK" optimisation that should get the new special value? Other than that, MvL's suggestion looks like a good idea. Cheers, Nick. -- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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