ownermap.h

   1 #ifndef PACHI_OWNERMAP_H
   2 #define PACHI_OWNERMAP_H
   3
   4 /* Map of board intersection owners, and devices to derive group status
   5  * information from the map. */
   6
   7 #include <signal.h> // sig_atomic_t
   8
   9 struct board_ownermap {
  10         /* Map of final owners of all intersections on the board. */
  11         /* This may be shared between multiple threads! */
  12         /* XXX: We assume sig_atomic_t is thread-atomic. This may not
  13          * be true in pathological cases. */
  14         sig_atomic_t playouts;
  15         /* At the final board position, for each coordinate increase the
  16          * counter of appropriate color. */
  17         sig_atomic_t (*map)[S_MAX]; // [board_size2(b)]
  18 };
  19
  20 void board_ownermap_fill(struct board_ownermap *ownermap, struct board *b);
  21 void board_ownermap_merge(int bsize2, struct board_ownermap *dst, struct board_ownermap *src);
  22
  23
  24 /* Estimate coord ownership based on ownermap stats. */
  25 enum point_judgement {
  26         PJ_DAME = S_NONE,
  27         PJ_BLACK = S_BLACK,
  28         PJ_WHITE = S_WHITE,
  29         PJ_UNKNOWN = 3,
  30 };
  31 enum point_judgement board_ownermap_judge_point(struct board_ownermap *ownermap, coord_t c, floating_t thres);
  32 float board_ownermap_estimate_point(struct board_ownermap *ownermap, coord_t c);
  33
  34
  35 /* Estimate status of stones on board based on ownermap stats. */
  36 struct group_judgement {
  37         floating_t thres;
  38         enum gj_state {
  39                 GS_NONE,
  40                 GS_DEAD,
  41                 GS_ALIVE,
  42                 GS_UNKNOWN,
  43         } *gs; // [bsize2]
  44 };
  45 void board_ownermap_judge_groups(struct board *b, struct board_ownermap *ownermap, struct group_judgement *judge);
  46
  47 /* Add groups of given status to mq. */
  48 struct move_queue;
  49 void groups_of_status(struct board *b, struct group_judgement *judge, enum gj_state s, struct move_queue *mq);
  50
  51 #endif