diff options
Diffstat (limited to 'flist.h')
-rw-r--r-- | flist.h | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/flist.h b/flist.h deleted file mode 100644 index b4fe6e65..00000000 --- a/flist.h +++ /dev/null @@ -1,204 +0,0 @@ -#ifndef _LINUX_FLIST_H -#define _LINUX_FLIST_H - -#include <stdlib.h> - -#undef offsetof -#ifdef __compiler_offsetof -#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER) -#else -#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) -#endif - -#define container_of(ptr, type, member) ({ \ - const typeof( ((type *)0)->member ) *__mptr = (ptr); \ - (type *)( (char *)__mptr - offsetof(type,member) );}) - -/* - * Simple doubly linked list implementation. - * - * Some of the internal functions ("__xxx") are useful when - * manipulating whole lists rather than single entries, as - * sometimes we already know the next/prev entries and we can - * generate better code by using them directly rather than - * using the generic single-entry routines. - */ - -struct flist_head { - struct flist_head *next, *prev; -}; - -#define FLIST_HEAD_INIT(name) { &(name), &(name) } - -#define FLIST_HEAD(name) \ - struct flist_head name = FLIST_HEAD_INIT(name) - -#define INIT_FLIST_HEAD(ptr) do { \ - (ptr)->next = (ptr); (ptr)->prev = (ptr); \ -} while (0) - -/* - * Insert a new entry between two known consecutive entries. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static inline void __flist_add(struct flist_head *new_entry, - struct flist_head *prev, - struct flist_head *next) -{ - next->prev = new_entry; - new_entry->next = next; - new_entry->prev = prev; - prev->next = new_entry; -} - -/** - * flist_add - add a new entry - * @new_entry: new entry to be added - * @head: list head to add it after - * - * Insert a new entry after the specified head. - * This is good for implementing stacks. - */ -static inline void flist_add(struct flist_head *new_entry, - struct flist_head *head) -{ - __flist_add(new_entry, head, head->next); -} - -static inline void flist_add_tail(struct flist_head *new_entry, - struct flist_head *head) -{ - __flist_add(new_entry, head->prev, head); -} - -/* - * Delete a list entry by making the prev/next entries - * point to each other. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static inline void __flist_del(struct flist_head *prev, - struct flist_head * next) -{ - next->prev = prev; - prev->next = next; -} - -/** - * flist_del - deletes entry from list. - * @entry: the element to delete from the list. - * Note: flist_empty on entry does not return true after this, the entry is - * in an undefined state. - */ -static inline void flist_del(struct flist_head *entry) -{ - __flist_del(entry->prev, entry->next); - entry->next = NULL; - entry->prev = NULL; -} - -/** - * flist_del_init - deletes entry from list and reinitialize it. - * @entry: the element to delete from the list. - */ -static inline void flist_del_init(struct flist_head *entry) -{ - __flist_del(entry->prev, entry->next); - INIT_FLIST_HEAD(entry); -} - -/** - * flist_empty - tests whether a list is empty - * @head: the list to test. - */ -static inline int flist_empty(const struct flist_head *head) -{ - return head->next == head; -} - -static inline void __flist_splice(const struct flist_head *list, - struct flist_head *prev, - struct flist_head *next) -{ - struct flist_head *first = list->next; - struct flist_head *last = list->prev; - - first->prev = prev; - prev->next = first; - - last->next = next; - next->prev = last; -} - -static inline void flist_splice(const struct flist_head *list, - struct flist_head *head) -{ - if (!flist_empty(list)) - __flist_splice(list, head, head->next); -} - -static inline void flist_splice_tail(struct flist_head *list, - struct flist_head *head) -{ - if (!flist_empty(list)) - __flist_splice(list, head->prev, head); -} - -static inline void flist_splice_tail_init(struct flist_head *list, - struct flist_head *head) -{ - if (!flist_empty(list)) { - __flist_splice(list, head->prev, head); - INIT_FLIST_HEAD(list); - } -} - -static inline void flist_splice_init(struct flist_head *list, - struct flist_head *head) -{ - if (!flist_empty(list)) { - __flist_splice(list, head, head->next); - INIT_FLIST_HEAD(list); - } -} - -/** - * flist_entry - get the struct for this entry - * @ptr: the &struct flist_head pointer. - * @type: the type of the struct this is embedded in. - * @member: the name of the flist_struct within the struct. - */ -#define flist_entry(ptr, type, member) \ - container_of(ptr, type, member) - -#define flist_first_entry(ptr, type, member) \ - flist_entry((ptr)->next, type, member) - -#define flist_last_entry(ptr, type, member) \ - flist_entry((ptr)->prev, type, member) - -/** - * flist_for_each - iterate over a list - * @pos: the &struct flist_head to use as a loop counter. - * @head: the head for your list. - */ -#define flist_for_each(pos, head) \ - for (pos = (head)->next; pos != (head); pos = pos->next) - -/** - * flist_for_each_safe - iterate over a list safe against removal of list entry - * @pos: the &struct flist_head to use as a loop counter. - * @n: another &struct flist_head to use as temporary storage - * @head: the head for your list. - */ -#define flist_for_each_safe(pos, n, head) \ - for (pos = (head)->next, n = pos->next; pos != (head); \ - pos = n, n = pos->next) - -extern void flist_sort(void *priv, struct flist_head *head, - int (*cmp)(void *priv, struct flist_head *a, struct flist_head *b)); - -#endif |