Start of a structure.

list.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <stdbool.h>
+
+#pragma GCC diagnostic ignored "-Wcast-align"
+#pragma GCC diagnostic ignored "-Wgnu-statement-expression"
+#pragma GCC diagnostic ignored "-Wlanguage-extension-token"
+
+#define offset_of(type, member) ((size_t) &((type *) NULL)->member)
+
+#define container_of(ptr, type, member) ({ \
+		typeof( ((type *) NULL)->member ) *__mptr = (ptr); \
+		(type *)( (char *)__mptr - offset_of(type, member) );})
+
+struct list_head {
+	struct list_head *next;
+	struct list_head *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define list_entry(ptr, type, member) \
+		container_of(ptr, type, member)
+
+#define list_for_each_entry(pos, head, member) \
+		for (pos = list_entry((head)->next, typeof(*pos), member); \
+				&pos->member != (head); \
+				pos = list_entry(pos->member.next, typeof(*pos), member))
+
+#define list_for_each_entry_safe(pos, n, head, member) \
+		for (pos = list_entry((head)->next, typeof(*pos), member), \
+					n = list_entry(pos->member.next, typeof(*pos), member); \
+				&pos->member != (head); \
+				pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+void list_head_init(struct list_head *);
+bool __attribute__ ((warn_unused_result)) list_is_empty(const struct list_head *);
+void list_add(struct list_head *, struct list_head *);
+void list_del(struct list_head *);