@@ -30,9 +30,9 @@
 } kmcond;
 
 typedef enum kmkind {
 	kmkind_none,
-	kmkind_fail,
+	kmkind_broken,
 	kmkind_linear,
 	kmkind_heap,
 	kmkind_pool,
 	kmkind_ref,
@@ -69,18 +69,28 @@
 	kmshred shred;
 	void* ref;
 } kmptr;
 
+/* this struct is used to return both a pointer
+ * and an error value at the same time. */
+typedef struct kmres {
+	kmcond cond;
+	union {
+		void* raw;
+		kmptr ptr;
+	};
+} kmres;
 /* heap functions */
 
-kmcond kmheapa (void**, sz);
-kmcond kmheapao(kmptr*, sz);
+kmres  kmheapa (sz);
+kmres  kmheapo (sz);
 kmcond kmheapf (void*);
+kmres  kmlina  (sz);
+void*  kmlini  (void);
 
 /* generic functions */
 
 kmcond kmfree(kmptr);
-kmkind kmtell(void*);
 void kmzero(void*,sz);
 void kmozero(kmptr);