Leopold Toetsch writes:
Good. Pass it over to me :) COW copy of stacks and of other buffer-based
items is still broken. These need distinct headers so that they work
like COWed strings.
Alright, I've got a pretty big incomplete patch here (see, when one has a deadline on a compiler written with the assumption of working continuations, one can be pretty determined :-).
It makes each chunk into a subclass of Buffer like so:
struct RegisterChunkBuf { size_t used; PObj* next; };
To do that properly, I think you need a pobj_t as the first struct member, like string has:
struct parrot_string_t {
pobj_t obj;
UINTVAL bufused;
void *strstart;
UINTVAL strlen;
const ENCODING *encoding;
const CHARTYPE *type;
INTVAL language;
};so maybe something like:
struct RegisterChunkBuf {
pobj_t obj;
UINTVAL bufused;
RegisterChunkBuf* next;
};But also take a look at list.h and see if it's already doing what you want to do; you may be able to do it directly.
And then, for example:
struct PRegChunkBuf { struct RegisterChunkBuf buf; struct PRegFrame PRegFrame[FRAMES_PER_CHUNK]; };
I want these things to be garbage collected, but DOD doesn't trace the buffer. I can't seem to find a way to mark the frames without making the chunks into PMCs (yuck). Is there a way to do this?
I think you'll need to add something to the root set tracing code (probably trace_active_buffers() in src/dod.c). I'm not sure what all of you stuff hangs off of, though.
Just some thoughts--I'm a little fuzzy on where these items are rooted.
JEff
