Mailing List Archive: 49091 messages
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search

[REBOL] Re: callbacks

From: moliad:g:mail at: 30-Oct-2007 1:35

hi all, well, seems the instability really is related with the GC being sort of pre-emptive hehe it thinks the ram is not usefull anymore... but we are inside the callback itself and bam... it crashes. the moment we play with a callback's arguments, setting one to none or even within a function which is called by the callback... so I had to allocate a Global word and set one of the callback's values to that word, as the first operation of the callback... I even had to convert the interface, set one to char* so rebol's GC would track its pointer use... from that point on, the whole system became totally stable, even with recycle/on being called repeteadly. because I set one of the interace's values to a char* I had to extract the address of the string and use two other methods from peekpoke to retrieve the original value which was a double float array to start with! so, overall, the callback is not for the faint of heart, but if you are patient, and tweak here and there, you can eventually get you want. note that you will not do much, if you do not also use the EXCELLENT peekpoke.rpower library over at ladislav's site. Cause in many cases, the callbacks use much more complex datastructures than what is available out of the box in rebol. I am able to convert double float variable length arrays being sent to me and other nice things, but without the peekpoke lib, I'd be quite lost indeed. -MAx On 10/30/07, Maxim Olivier-Adlhoch <> wrote: