At 02:45 PM 8/5/00 +0000, Nick Ing-Simmons wrote:
>We currently (perl5) have the "token" being:
>
>struct sv {
> void* sv_any; /* pointer to something */
> U32 sv_refcnt; /* how many references to us */
> U32 sv_flags; /* what we are */
>};
>
>3 words (which is a "funny" number in a binary world.
Three is an interesting number....
>(With the type hiding in flags as a small int.)
>
>Current perl6 "token" proposed by RFC 35 is:
>
>5 words (which is if anything a slighty worse number...)
For a number of fnord reasons, five is a better number. :)
>I think I would make it 4 or 8 words:
>So my own favourite right now allows a little more - to keep data and token
>together for cache, and to avoid extra malloc() in simple cases.
>Some variant like:
>
> struct {
> vtable_t *vtable; // _new_ - explcit type
> IV flags; // sv_flags
> void *sync_data; // _new_ - for threads etc.
> IV GC_data; // REFCNT
> void *ptr; // SvPV, SvRV
> IV iv; // SvIV, SvCUR/SvOFF
> NV nv; // SvNV
> }
Sold, to the man talking sense! I'll update the RFC with this. (I really
should read all my mail before responding...)
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
[EMAIL PROTECTED] have teddy bears and even
teddy bears get drunk
