On Mon, Dec 30, 2002 at 04:00:55PM -0800, Steve Fink wrote: > =head1 Solution 3: Explicity root set augmentation > > A final possible solution is to provide a mechanism to temporarily > anchor an otherwise unanchored object to the root set. (eg, have an > array of objects associated with the interpreter that are all > considered to be part of the root set.) This has pretty much the same > advantages and disadvantages of explicit neonate flag setting: > > + Simple > + Fast DOD > - Slow for unanchored temporaries > - Sometimes slow for anchored objects (depending on whether they need > to be temporarily anchored before the final anchoring)
What do you mean by slow here? > - Easy to forget to remove temporaries from the root set > - Easy to double-anchor objects and forget to remove the temporary > anchoring > - longjmp() can bypass the unanchoring The temporary objects could be stored in a stack, which is popped when leaving the current function (both with normal exits and longjmp). This should make it a lot less likely to forget the unanchoring. -- Jerome
