door_id_t
#define INVALID_DOORID ((door_id_t)-1)
door_id_t rc_doorid; /* a globally unique identifier */
door_id_t pd_uniqid;
door_id_t rh_doorid;
static door_id_t index = 0;
door_id_t d_id; /* unique id */
door_id_t di_uniquifier; /* Unique number */
door_id_t door_index; /* Used as a uniquifier */