@@ -11,13 +11,20 @@
 #endif
 
 typedef enum kmcond {
 	kmcond_ok,
+	kmcond_unnecessary,
+
+	kmcond_fail,
+	kmcond_unhandled,
+	kmcond_mismatch,
 	kmcond_bad_address,
 } kmcond;
 
 typedef enum kmkind {
 	kmkind_none,
+	kmkind_fail,
+	kmkind_linear,
 	kmkind_heap,
 	kmkind_pool,
 	kmkind_ref,
 	kmkind_tree
@@ -27,29 +34,49 @@
 	kmshred_yes,
 	kmshred_no
 } kmshred;
 
-typedef struct kmcell {
+typedef struct kmbox {
 	kmkind kind;
 	sz size;
 	kmshred shred;
+} kmbox;
+
+typedef struct kmcell {
+	kmbox header;
 	sz refs;
 	struct kmcell* src;
 } kmcell;
+
+typedef struct kmnode {
+	kmbox header;
+	struct kmnode* origin,
+		         * branch,
+				 * next,
+				 * prev;
+} kmnode;
 
 typedef struct kmptr {
 	kmkind kind;
 	kmshred shred;
 	void* ref;
-	kmcell* cell;
 } kmptr;
 
 /* heap functions */
 
 void*  kmheapa(sz);
+kmptr  kmheapao(sz);
 kmcond kmheapf(void*);
+
+/* generic functions */
+
+kmcond kmfree(kmptr);
+kmkind kmtell(void*);
+void kmzero(void*,sz);
+void kmozero(kmptr);
+
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif