Re[2]: [Gc] weak maps and libgc

[Ivan Maidanski]

Hi Andy,

Look good to me. I've checked it into my working tree (and commit in several days I hope).
I've done one change to the proposed function - in case dest==src, it now returns success (instead of GC_DUPLICATE).

Also, I've added some tests regarding the function.

Regards.

26 10 2011, 20:18 Andy Wingo <wingo at pobox.com>:
> On Wed 26 Oct 2011 10:18, Ivan Maidanski <ivmai at mail.ru> writes:
> 
> >>  (2) a function to move disappearing links, perhaps callable only
> >>      within the alloc lock.
> >> 
> >>      I did some profiling today with the open-addressed table.  It has
> >>      to shuffle items around sometimes.  Unregistering then registering
> >>      disappearing links shows up pretty high on the profile.
> >
> > Is my understanding correct - you want to optimize the following:
> >
> > // assume GC_general_register_disappearing_link(&link, obj1);
> > ...
> > GC_unregister_disappearing_link(&link);
> > GC_general_register_disappearing_link(&link, obj2);
> >
> > Right? If yes, I don't mind again.
> 
> Patch attached.  WDYT?
> 
> Andy
> 
> 
> 
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