phase C, D & E

1 files changed, 15 insertions, 1 deletions

diff --git a/include/engine/threads.h b/include/engine/threads.h
index da221a8..43c4459 100644
--- a/include/engine/threads.h
+++ b/include/engine/threads.h
@@ -21,6 +21,7 @@ typedef struct split_point {
 
   struct split_point *parent;
   int ply;
+  int depth; // remaining search depth at this node
   int node_type;
   int confidence;
   position_t position_snapshot;
@@ -39,7 +40,8 @@ struct child_thread_args {
 
   position_t *position;
   ttable_t *ttable;
-  int sp_stack;
+  split_point_t *split_points; // shared DTS pool (§2.4)
+  size_t sp_pool_capacity;
   engine_message_handler_t *message;
 };
 struct root_thread_args {
@@ -82,6 +84,18 @@ void __threads_args_init(
   struct threads *handler,
   int i
 );
+
+// DTS primitives (§2.3–2.8): split point pool + lock-free move claiming
+split_point_t *split_point_alloc(struct threads *handler);
+void split_point_free(struct threads *handler, split_point_t *split_point);
+void split_point_publish(split_point_t *split_point);
+bool split_point_claim_move(split_point_t *split_point, move_t *move);
+bool split_point_merge(split_point_t *split_point);
+void split_point_share(split_point_t *split_point, i32 score, move_t move);
+
+// HELP (§2.3): scan the pool for a published split point with work left
+split_point_t *threads_find_work(struct threads *handler);
+split_point_t *__pool_find_work(split_point_t *pool, size_t capacity);
 #endif
 void threads_init(struct threads *handler, size_t capacity);
 void threads_deinit(struct threads *handler);