toys

commit df9b3ae7e4b1a93812ef46d86cf6d23e825a34d5
parent babca69b3485ac8d3434490773c07419849e62b0
Author: Mikołaj Lenczewski <mblenczewski@gmail.com>
Date:   Thu, 23 Oct 2025 15:41:00 +0100

Tweak utils.h

Diffstat:
M
list.h
 | 
9
+--------
M
utils.h
 | 
12
++++++++++++

2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/list.h b/list.h
@@ -5,13 +5,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-/* we define an "intrusive" list, meaning that out data struct contains a
- * list_node member. this allows a type-generic list implementation, but
- * necessitates need a way to get from a pointer to this list_node, to a
- * pointer to the parent struct
- */
-#define TO_PARENT(ptr, T, member) \
-	((T *) ((uintptr_t) (ptr) - offsetof(T, member)))
+#include "utils.h"
 
 /* we choose to implement a doubly-linked list for simplicity and flexible
  * use in situations that require either singly-linked or doubly-linked lists
@@ -33,7 +27,6 @@ struct list_node {
 #define LIST_INIT(list) ((struct list_node) { .prev = &(list), .next = &(list), })
 #define LIST_EMTPY(list) (LIST_HEAD(list) == (list) && LIST_TAIL(list) == (list))
 
-
 inline void
 list_node_link(struct list_node *node, struct list_node *prev, struct list_node *next)
 {
diff --git a/utils.h b/utils.h
@@ -1,6 +1,10 @@
 #ifndef UTILS_H
 #define UTILS_H
 
+#include <stdalign.h>
+#include <stddef.h>
+#include <stdint.h>
+
 #define KiB(v) (1024ull * (v))
 #define MiB(v) (1024 * KiB(v))
 #define GiB(v) (1024 * MiB(v))
@@ -8,6 +12,14 @@
 
 #define ARRLEN(arr) (sizeof (arr) / sizeof (arr)[0])
 
+/* we define an "intrusive" list, meaning that out data struct contains a
+ * list_node member. this allows a type-generic list implementation, but
+ * necessitates need a way to get from a pointer to this list_node, to a
+ * pointer to the parent struct
+ */
+#define TO_PARENT(ptr, T, member) \
+	((T *) ((uintptr_t) (ptr) - offsetof(T, member)))
+
 /* helper macros to allow us to use bitwise tricks to quickly and efficiently
  * calculate aligned addresses and sizes.
  */