Re: Another alternative string representation proposal

[Keisuke Nishida]

address@hidden (Carl R. Witty) writes:

> > Is owner_p really necessary?  If a char-field is read-only, it is not
> > the owner of the character sequence.  If it is mutable or immutable,
> > we can force the char-field to own the sequence.
> 
> I can see at least one potential use for a mutable, not-owned string:
> it could be used by a guile wrapper for mmap.  Although probably it
> would be better to use a different, specialized type for this; so
> that's not much of an argument...

If you modify mmap'ed memory, it is copied anyway, isn't it?  And we'd
like to use shared mapping rather than private mapping, right?  I think
mmap'ed memory should be read-only.

BTW, if I choose indirect threading with my VM, I can use shared mmap
for loading bytecode because no modification is needed at loading time.
Another reason to switch to indirect threading.  I'll implement it later..