Re: libseed-list handling gpointer args/returns

[Jonatan Liljedahl <lijon kymatica com>]

Could you explain why simply setting arg->v_pointer = (gpointer) value 
would break stuff? And why one should wrap JS values in GValues?

Regarding memory handling, when it's an arg to a function that uses the 
pointer synchronously, then I guess nothing needs to be done. Just pass 
the pointer.

In other cases (like callback user_data) one would need to 
JSValueProtect() it and unprotect it when it's not longer needed (when 
the callback is destroyed). not sure how to solve that, but I guess this 
is already done for other arg-types, perhaps depending on gir info about 
ownership/scope/etc..?

/Jonatan

On 07/29/2010 12:52 AM, Alan Knowles wrote:
> The whole pointer/ in out, memory handling needs quite some though.
>
> I've not come up with a idea for a solution that solves all, or even most scenarios without breaking stuff.
>
> It needs some trial and error probably
> my guess is that the solution might be only allowing GObjects to be stored in gpointer data - and wrap JS values up in GValues
>
> I've no idea how badly that might affect memory usage though...
>
> Regards
> Alan
>
>
>
>   --- On 29/Jul/2010, Jonatan Liljedahl wrote:
> > many functions in GLib take gpointer as args or return values, for
> > example GLib.async_queue_push(queue, data).
> >
> > but this doesn't work currently, it gives errors like "ArgumentError
> > Unable to make argument 2 for function: async_queue_push."
> >
> > There is a hack in seed_gi_make_argument() that allows strings to be
> > passed, but this doesn't seem to work either (async_queue_pop() don't
> > seem to return a pushed string, but undefined)
> >
> > it should be possible and perhaps even simple to just wrap seed
> > objects/values in these cases.
> >
> > what function does the gvalue-to-seed conversion of the return value?
> >
> > /Jonatan
> > _______________________________________________
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> > libseed-list gnome org
> > http://mail.gnome.org/mailman/listinfo/libseed-list
>
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