Re: Lisp object that refers to a C struct

[Stefan Monnier]

>> What happens if someone passes you this same integer some time after
>> you've freed the C struct?
> It won't be found in the list of watches, so the command to remove
> that watch will say "Invalid watch descriptor", and Lisp-level code
> will not find the corresponding Lisp data structure.

So the integer doesn't encode the pointer, instead it's an index into
a table of C structs.  Like POSIX file-descriptors.
That would work, of course.


        Stefan