interface dispatch

[Godmar Back]

 Oh, okay, I see, you could define

typedef struct {
	Hjava_lang_Class	*iface;
	methodptr		*meth[1];
} *partialiftable;

in this case too.

Thanks,

	- Godmar

> 
> Godmar Back <gback@cs.utah.edu> writes:
> 
> > > #define CLASS_INSTANCEOF_INTERFACE(CL, IFACE) \
> > >   (CLASS_IINDEX(CL) <= CLASS_IOFFSETS_LENGTH(IFACE) \
> > >    && ({unsigned short __offset = CLASS_IOFFSETS(IFACE)[CLASS_IINDEX(CL)]; \
> > >         __offset < CLASS_ITABLE_LENGTH(CL) \
> > >         && CLASS_ITABLE(CL)[__offset]] == IFACE}))
> > 
> > What I don't understand here is the "CLASS_ITABLE(CL)[__offset]] == IFACE"
> 
> I belive that should have been:
> 
>         && CLASS_ITABLE(CL)[__offset][0] == IFACE}))
> 
> Note this part:
> 
> // Each superinterface of a class (i.e. each interface that the class
> // directly or indirectly implements) has a corresponding "Partial
> // Interface Dispatch Table" whose size is (number of methods + 1) words.
> // The first word is a pointer to the interface (i.e. the java.lang.Class
> // instance for that interface).  The remaining words are pointers to the
> // actual methods that implement the methods declared in the interface,
> // in the order specified by the Interface Method Index of the previous
> // paragraph.
> -- 
> 	--Per Bothner
> per@bothner.com   http://www.bothner.com/~per/
>