caddr_t           343 libdb/btree.h  	caddr_t	  bt_cmap;		/* R: current point in mapped space */
caddr_t           344 libdb/btree.h  	caddr_t	  bt_smap;		/* R: start of mapped space */
caddr_t           345 libdb/btree.h  	caddr_t   bt_emap;		/* R: end of mapped space */