_CALLOC_2D

#define _CALLOC_2D	(		x,
			d1,
			d2,
			type
	)

Value:

x = calloc((d1),sizeof(type*));\
                                  for(i=0;i<(d1);i++){\
                                    x[i] = calloc((d2),sizeof(type));\
                                  }