Re: Using SCMs as hash keys

[Russell McManus <russell dot mcmanus at msdw dot com>]

Andrew Chadwick <andrew.chadwick@symbian.com> writes:

> Actually the hash table is a GHashTable from GLib (it must be queried
> quickly and regularly from the C side, but never from the Scheme side)
> But thanks for the warning; the hash does need adding to and deleting
> from fairly frequently too.
> 
> Perhaps it would be simpler to scm_protect_object() a vector on the
> Scheme side. Would a scm_vector_set_length_x() followed by a
> scm_vector_set_x() be any quicker?

I'm suggesting that you simply create your own equivalent of
scm_protect_object() using a scheme hash table allocated with
scm_make_vector().  You can use scm_hashq_set_x, etc. to put your keys
into this hash table, and just call scm_protect_object() on the hash
table.  Maybe we are in perfect agreement; I can't quite tell from
your email.

-russ


--
Computers are not intelligent.  They only think they are.