[rdnzl-devel] The constant *ffi-args-size* in port-acl

[Charles A. Cox]

Charles A. Cox wrote:
>
>  Just a quick note to say that I'm on travel this week.  I don't 
> immediately remember how the limit was picked or how much it can be 
> increased, so I'll have to take a look at this when I get back (early 
> next week, I hope). 


  I managed to squeeze in a quick look at the code to remind myself 
what's going on.  It does seem as though the limit can safely be 
increased to 20 (or beyond).  The issue is that we are doing stack 
allocation at this point, which requires an array size to be known when 
the Lisp code is being compiled.  That's the reason we specify a size at 
all.  The actual limit value is arbitrary.  It's best to keep it to a 
reasonably small number, though, so as not to waste stack space at runtime.

  The (error "Need more coding here...") was probably a note to myself 
that it would be nice to have a way to go beyond the limit at runtime, 
say, with simulated dyanamic-extent static arrays, but I seem to have 
left that as a lower priority task since it was easier just to increase 
the limit and recompile rdnzl when needed.

  Feel free to let me know if there are further questions.

Charley