Custodians from Racket looks like what is described https://docs.racket-lang.org/reference/eval-model.html#%28part._custodian-model%29
On Fri, Aug 26, 2016 at 5:51 PM, David McClain <d...@refined-audiometrics.com> wrote: > Thanks for both of those references…. Dinosaur indeed… I’m old enough too, > that I need to avoid walking near the La Brea Tar Pits… > > - DM > > > On Aug 26, 2016, at 06:42, Hans Hübner <hans.hueb...@gmail.com> wrote: > > The Lisp Machine Manual has a nice chapter on resources that may be of > interest: https://hanshuebner.github.io/lmman/resour.xml > >