diff options
Diffstat (limited to 'client/list.h')
-rw-r--r-- | client/list.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/client/list.h b/client/list.h new file mode 100644 index 0000000..1fca5e7 --- /dev/null +++ b/client/list.h @@ -0,0 +1,112 @@ +/* list.h - Single and double linked list macros + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 or later as + * published by the Free Software Foundation. + * + * See http://www.gnu.org/ for details. + * + * This is more or less based on the code in the linux kernel. There are + * minor differences and this is only a subset of the kernel version. + */ + +#ifndef LIST_H +#define LIST_H + +#ifndef NULL +#define NULL 0L +#endif + +#ifndef offsetof +#ifdef __compiler_offsetof +#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER) +#else +#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) +#endif +#endif + +#ifndef container_of +#define container_of(ptr, type, member) ({ \ + const typeof( ((type *)0)->member ) *__mptr = (ptr); \ + (type *)( (char *)__mptr - offsetof(type,member) );}) +#endif + +struct list_head { + struct list_head *next, *prev; +}; + +#define LIST_INITIALIZER(l) { .next = &l, .prev = &l } + +static inline void list_init(struct list_head *list) +{ + list->next = list; + list->prev = list; +} + +static inline void __list_add(struct list_head *new, + struct list_head *prev, + struct list_head *next) +{ + next->prev = new; + new->next = next; + new->prev = prev; + prev->next = new; +} + +static inline void list_add(struct list_head *new, struct list_head *head) +{ + __list_add(new, head, head->next); +} + +static inline void list_add_tail(struct list_head *new, struct list_head *head) +{ + __list_add(new, head->prev, head); +} + +static inline void __list_del(struct list_head * prev, struct list_head * next) +{ + next->prev = prev; + prev->next = next; +} + +static inline void list_del(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); + entry->next = NULL; + entry->prev = NULL; +} + +static inline int list_hashed(const struct list_head *n) +{ + return n->next != n && n->next != NULL; +} + +static inline int list_empty(const struct list_head *n) +{ + return !list_hashed(n); +} + +#define list_next(ptr, type, member) \ + (list_hashed(ptr) ? container_of((ptr)->next,type,member) : NULL) + +#define list_entry(ptr, type, member) container_of(ptr,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) + +#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)) + +#endif |