Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

include/lib/list.h

@@ -0,0 +1,56 @@
+#ifndef _LIB_LIST_H
+#define _LIB_LIST_H
+
+#include <stddef.h>
+
+struct list_head {
+    struct list_head *next, *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+#define LIST_HEAD(name) struct list_head name = LIST_HEAD_INIT(name)
+
+static inline void INIT_LIST_HEAD(struct list_head *list) {
+    list->next = list;
+    list->prev = list;
+}
+
+static inline void __list_add(struct list_head *new_node,
+                              struct list_head *prev,
+                              struct list_head *next) {
+    next->prev = new_node;
+    new_node->next = next;
+    new_node->prev = prev;
+    prev->next = new_node;
+}
+
+static inline void list_add(struct list_head *new_node, struct list_head *head) {
+    __list_add(new_node, head, head->next);
+}
+
+static inline void list_add_tail(struct list_head *new_node, struct list_head *head) {
+    __list_add(new_node, head->prev, head);
+}
+
+static inline void list_del(struct list_head *entry) {
+    entry->next->prev = entry->prev;
+    entry->prev->next = entry->next;
+    entry->next = NULL;
+    entry->prev = NULL;
+}
+
+static inline int list_empty(const struct list_head *head) {
+    return head->next == head;
+}
+
+#define list_entry(ptr, type, member) \
+    ((type *)((char *)(ptr) - offsetof(type, member)))
+
+#define list_for_each(pos, head) \
+    for (pos = (head)->next; pos != (head); pos = pos->next)
+
+#define list_for_each_safe(pos, n, head) \
+    for (pos = (head)->next, n = pos->next; pos != (head); \
+        pos = n, n = pos->next)
+
+#endif // _LIB_LIST_H