Leopold Toetsch <[EMAIL PROTECTED]> writes: > [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: >> On 25/03/2004, at 9:01 PM, Leopold Toetsch wrote: > >>> All these generational collectors don't work with Parrot objects. We >>> guarantee that objects don't move around. > >> Oh, I didn't see a mention of this in a PDD. What's the reason for why >> you provide such a guarantee? Just curious. > > PMCs are passed on to (external) C code. When inmidst of C code the > PMC moves around things break horribly--as they now break with the > copying collector when you do: > > char *c = string->strstart; > ... > <GC runs e.g. triggered by string_compare> > ... > do something with c
I know it's extra indirection, but maybe we should be passing pointers to pointers rather than plain pointers to C functions. It could be a win if that gets us faster GC...
