/* include/f/arvo.h
**
** This file is in the public domain.
*/
  /**   Data structures.
  **/
    /* u2_cart: ovum carton.
    */
      struct _u2_reck;

      typedef struct _u2_cart {
        u2_noun egg;                      //  ovum itself
        u2_bean did;                      //  cart considered for commit?
        u2_bean cit;                      //  cart committed?
        c3_w    ent_w;                    //  entry in raft queue?
        void (*clr_f)                     //  ovum processing failed
            (struct _u2_reck *rec_u,      //  system
             u2_noun,                     //  egg itself
             u2_noun,                     //  failure mode
             u2_noun);                    //  trace if any
        struct _u2_cart* nex_u;           //  next in queue
      } u2_cart;

    /* u2_reck: modern arvo structure.
    */
      typedef struct _u2_reck {
        c3_w    kno_w;                    //  kernel stage
        c3_w    rno_w;                    //  rotor index (always 0)
        c3_w    ent_w;                    //  event counter XX 64

        u2_noun yot;                      //  new toy system
        u2_noun now;                      //  current time, as noun
        u2_noun wen;                      //  current time, as text
        u2_noun sev_l;                    //  instance number
        u2_noun sen;                      //  instance string
        u2_noun own;                      //  owner list

        u2_noun roe;                      //  temporary unsaved events
        u2_noun key;                      //  log key, or 0

        u2_noun ken;                      //  kernel formula (for now)
        u2_noun roc;                      //  rotor core

        union {
          struct { uint64_t a; uint64_t b; };
          struct {
            struct _u2_cart* egg_u;         //  exit of ovum queue
            struct _u2_cart* geg_u;         //  entry of ovum queue
          } ova;
        };
      } u2_reck;

  /**   Global variables.
  **/
#define  u2_Arv  ((u2_reck*)u2_at_cord(u2_wire_arv_r(u2_Wire), sizeof(u2_reck)))
#define  u2A      u2_Arv