[Gambas-devel] Store GB_VARIANT in memory

[Tobias Boege]

On Mon, 13 Aug 2012, Beno?t Minisini wrote:
> Le 11/08/2012 19:13, Tobias Boege a ?crit :
> > Hi,
> >
> > I want to save a GB_VARIANT into a buffer, Ref() the object inside, if any,
> > and return in later properly. My code looks something like this:
> >
> > static void *val;
> >
> > BEGIN_METHOD(Store, GB_VARIANT value)
> >
> > 	/* Tried also GB_VARIANT here, but the error differs only, maybe
> > 	 * because of the application... */
> > 	GB.Alloc(&val, sizeof(GB_VARIANT_VALUE));
> > 	GB.StoreVariant(ARG(value), val);
> >
> > END_METHOD
> >
> > BEGIN_METHOD_VOID(Restore)
> >
> > 	GB.ReturnVariant(val);
> > 	GB.Free(&val);
> >
> > END_METHOD
> >
> > Suppose each Store() matches a Restore(), I get Segfaults in VALUE_write()
> > and since I don't quite look through Gambas datatype and storage (yesterday
> > crusaded against object reference counting successfully, though) I thought
> > it's simpler to ask directly - the array types were not really helpful to
> > me as I could not get to the exact point where memory allocation takes
> > place. Or, if I were there (ARRAY_add_data()?), I didn't get it.
> >
> > BTW, the above is clearly simplified, I need allocating val dynamically.
> >
> > Regards,
> > Tobi
> >
> 
> Oops, I forgot you... :-)
> 
> A Gambas Variant is store inside a GB_VARIANT_VALUE structure. You don't 
> need to allocate it on the heap.
> 
> // A Variant must be initialized to NULL
> 
> static GB_VARIANT_VALUE val = { T_NULL };

Oh. The above detail get me rid of the valgrind warnings! Great.
Solely some (phantom) reference problems persist...