[PATCH] list.h update (resent again)

Christoph Hellwig
2002-08-29T00:12:09Z

This patch updates list.h to the 2.5 version, including

- list_t typedef
- static inline insead of static __inline__
- list_move/list_move_tail
- list_splice_init

--- linux-2.4.20-pre5/include/linux/list.h Thu Aug 29 02:58:49 2002
+++ linux/include/linux/list.h Thu Aug 29 03:07:35 2002
@@ -19,10 +19,12 @@ struct list_head {
struct list_head *next, *prev;
};

+typedef struct list_head list_t;
+
#define LIST_HEAD_INIT(name) { &(name), &(name) }

#define LIST_HEAD(name) \
- struct list_head name = LIST_HEAD_INIT(name)
+ list_t name = LIST_HEAD_INIT(name)

#define INIT_LIST_HEAD(ptr) do { \
(ptr)->next = (ptr); (ptr)->prev = (ptr); \
@@ -34,9 +36,7 @@ struct list_head {
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
-static __inline__ void __list_add(struct list_head * new,
- struct list_head * prev,
- struct list_head * next)
+static inline void __list_add(list_t *new, list_t *prev, list_t *next)
{
next->prev = new;
new->next = next;
@@ -52,7 +52,7 @@ static __inline__ void __list_add(struct
* Insert a new entry after the specified head.
* This is good for implementing stacks.
*/
-static __inline__ void list_add(struct list_head *new, struct list_head *head)
+static inline void list_add(list_t *new, list_t *head)
{
__list_add(new, head, head->next);
}
@@ -65,7 +65,7 @@ static __inline__ void list_add(struct l
* Insert a new entry before the specified head.
* This is useful for implementing queues.
*/
-static __inline__ void list_add_tail(struct list_head *new, struct list_head *head)
+static inline void list_add_tail(list_t *new, list_t *head)
{
__list_add(new, head->prev, head);
}
@@ -77,8 +77,7 @@ static __inline__ void list_add_tail(str
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
-static __inline__ void __list_del(struct list_head * prev,
- struct list_head * next)
+static inline void __list_del(list_t * prev, list_t * next)
{
next->prev = prev;
prev->next = next;
@@ -89,54 +88,96 @@ static __inline__ void __list_del(struct
* @entry: the element to delete from the list.
* Note: list_empty on entry does not return true after this, the entry is in an undefined state.
*/
-static __inline__ void list_del(struct list_head *entry)
+static inline void list_del(list_t *entry)
{
__list_del(entry->prev, entry->next);
+ entry->next = (void *) 0;
+ entry->prev = (void *) 0;
}

/**
* list_del_init - deletes entry from list and reinitialize it.
* @entry: the element to delete from the list.
*/
-static __inline__ void list_del_init(struct list_head *entry)
+static inline void list_del_init(list_t *entry)
{
__list_del(entry->prev, entry->next);
INIT_LIST_HEAD(entry);
}

/**
+ * list_move - delete from one list and add as another's head
+ * @list: the entry to move
+ * @head: the head that will precede our entry
+ */
+static inline void list_move(list_t *list, list_t *head)
+{
+ __list_del(list->prev, list->next);
+ list_add(list, head);
+}
+
+/**
+ * list_move_tail - delete from one list and add as another's tail
+ * @list: the entry to move
+ * @head: the head that will follow our entry
+ */
+static inline void list_move_tail(list_t *list, list_t *head)
+{
+ __list_del(list->prev, list->next);
+ list_add_tail(list, head);
+}
+
+/**
* list_empty - tests whether a list is empty
* @head: the list to test.
*/
-static __inline__ int list_empty(struct list_head *head)
+static inline int list_empty(list_t *head)
{
return head->next == head;
}

+static inline void __list_splice(list_t *list, list_t *head)
+{
+ list_t *first = list->next;
+ list_t *last = list->prev;
+ list_t *at = head->next;
+
+ first->prev = head;
+ head->next = first;
+
+ last->next = at;
+ at->prev = last;
+}
+
/**
* list_splice - join two lists
* @list: the new list to add.
* @head: the place to add it in the first list.
*/
-static __inline__ void list_splice(struct list_head *list, struct list_head *head)
+static inline void list_splice(list_t *list, list_t *head)
{
- struct list_head *first = list->next;
-
- if (first != list) {
- struct list_head *last = list->prev;
- struct list_head *at = head->next;
-
- first->prev = head;
- head->next = first;
+ if (!list_empty(list))
+ __list_splice(list, head);
+}

- last->next = at;
- at->prev = last;
+/**
+ * list_splice_init - join two lists and reinitialise the emptied list.
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ *
+ * The list at @list is reinitialised
+ */
+static inline void list_splice_init(list_t *list, list_t *head)
+{
+ if (!list_empty(list)) {
+ __list_splice(list, head);
+ INIT_LIST_HEAD(list);
}
}

/**
* list_entry - get the struct for this entry
- * @ptr: the &struct list_head pointer.
+ * @ptr: the &list_t pointer.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_struct within the struct.
*/
@@ -145,17 +186,25 @@ static __inline__ void list_splice(struc

/**
* list_for_each - iterate over a list
- * @pos: the &struct list_head to use as a loop counter.
+ * @pos: the &list_t to use as a loop counter.
* @head: the head for your list.
*/
#define list_for_each(pos, head) \
for (pos = (head)->next, prefetch(pos->next); pos != (head); \
pos = pos->next, prefetch(pos->next))
+/**
+ * list_for_each_prev - iterate over a list backwards
+ * @pos: the &list_t to use as a loop counter.
+ * @head: the head for your list.
+ */
+#define list_for_each_prev(pos, head) \
+ for (pos = (head)->prev, prefetch(pos->prev); pos != (head); \
+ pos = pos->prev, prefetch(pos->prev))

/**
* list_for_each_safe - iterate over a list safe against removal of list entry
- * @pos: the &struct list_head to use as a loop counter.
- * @n: another &struct list_head to use as temporary storage
+ * @pos: the &list_t to use as a loop counter.
+ * @n: another &list_t to use as temporary storage
* @head: the head for your list.
*/
#define list_for_each_safe(pos, n, head) \
@@ -163,16 +212,6 @@ static __inline__ void list_splice(struc
pos = n, n = pos->next)

/**
- * list_for_each_prev - iterate over a list in reverse order
- * @pos: the &struct list_head to use as a loop counter.
- * @head: the head for your list.
- */
-#define list_for_each_prev(pos, head) \
- for (pos = (head)->prev, prefetch(pos->prev); pos != (head); \
- pos = pos->prev, prefetch(pos->prev))
-
-
-/**
* list_for_each_entry - iterate over list of given type
* @pos: the type * to use as a loop counter.
* @head: the head for your list.