mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-11-26 02:39:55 +03:00
315 lines
9.0 KiB
C
315 lines
9.0 KiB
C
#ifndef __LIST_H__
|
|
#define __LIST_H__
|
|
|
|
typedef struct _list list_t;
|
|
|
|
struct _list
|
|
{
|
|
list_t *next, *prev;
|
|
};
|
|
|
|
#define LIST_HEAD_INIT(name) { &(name), &(name) }
|
|
|
|
#define LIST_HEAD(name) \
|
|
list_t name = LIST_HEAD_INIT(name)
|
|
|
|
static inline void INIT_LIST_HEAD(list_t *list)
|
|
{
|
|
list->next = list;
|
|
list->prev = list;
|
|
}
|
|
|
|
/*
|
|
* 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 __list_add(list_t *lnew, list_t *prev, list_t *next)
|
|
{
|
|
next->prev = lnew;
|
|
lnew->next = next;
|
|
lnew->prev = prev;
|
|
prev->next = lnew;
|
|
}
|
|
|
|
/**
|
|
* list_add - add a new entry
|
|
* @new: 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 list_add(list_t *lnew, list_t *head)
|
|
{
|
|
__list_add(lnew, head, head->next);
|
|
}
|
|
|
|
|
|
/**
|
|
* list_add_tail - add a new entry
|
|
* @new: new entry to be added
|
|
* @head: list head to add it before
|
|
*
|
|
* Insert a new entry before the specified head.
|
|
* This is useful for implementing queues.
|
|
*/
|
|
static inline void list_add_tail(list_t *lnew, list_t *head)
|
|
{
|
|
__list_add(lnew, 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 __list_del(list_t * prev, list_t * next)
|
|
{
|
|
next->prev = prev;
|
|
prev->next = next;
|
|
}
|
|
|
|
/**
|
|
* list_del - deletes entry from list.
|
|
* @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_entry(list_t *entry)
|
|
{
|
|
__list_del(entry->prev, entry->next);
|
|
}
|
|
|
|
static inline void list_del(list_t *entry)
|
|
{
|
|
__list_del(entry->prev, entry->next);
|
|
entry->next = NULL;
|
|
entry->prev = NULL;
|
|
}
|
|
|
|
/**
|
|
* list_replace - replace old entry by new one
|
|
* @old : the element to be replaced
|
|
* @new : the new element to insert
|
|
*
|
|
* If @old was empty, it will be overwritten.
|
|
*/
|
|
static inline void list_replace(list_t *old, list_t *lnew)
|
|
{
|
|
lnew->next = old->next;
|
|
lnew->next->prev = lnew;
|
|
lnew->prev = old->prev;
|
|
lnew->prev->next = lnew;
|
|
}
|
|
|
|
static inline void list_replace_init(list_t *old, list_t *lnew)
|
|
{
|
|
list_replace(old, lnew);
|
|
INIT_LIST_HEAD(old);
|
|
}
|
|
|
|
/**
|
|
* list_del_init - deletes entry from list and reinitialize it.
|
|
* @entry: the element to delete from the list.
|
|
*/
|
|
static inline void list_del_init(list_t *entry)
|
|
{
|
|
__list_del_entry(entry);
|
|
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_entry(list);
|
|
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_entry(list);
|
|
list_add_tail(list, head);
|
|
}
|
|
|
|
/**
|
|
* list_is_last - tests whether @list is the last entry in list @head
|
|
* @list: the entry to test
|
|
* @head: the head of the list
|
|
*/
|
|
static inline int list_is_last(const list_t *list, const list_t *head)
|
|
{
|
|
return list->next == head;
|
|
}
|
|
|
|
/**
|
|
* list_empty - tests whether a list is empty
|
|
* @head: the list to test.
|
|
*/
|
|
static inline int list_empty(const list_t *head)
|
|
{
|
|
return head->next == head;
|
|
}
|
|
|
|
#define container_of(ptr, type, member) ({ \
|
|
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
|
|
(type *)( (char *)__mptr - offsetof(type,member) );})
|
|
|
|
|
|
|
|
/**
|
|
* list_entry - get the struct for this entry
|
|
* @ptr: the &struct list_head pointer.
|
|
* @type: the type of the struct this is embedded in.
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_entry(ptr, type, member) \
|
|
container_of(ptr, type, member)
|
|
|
|
/**
|
|
* list_first_entry - get the first element from a list
|
|
* @ptr: the list head to take the element from.
|
|
* @type: the type of the struct this is embedded in.
|
|
* @member: the name of the list_head within the struct.
|
|
*
|
|
* Note, that list is expected to be not empty.
|
|
*/
|
|
#define list_first_entry(ptr, type, member) \
|
|
list_entry((ptr)->next, type, member)
|
|
|
|
/**
|
|
* list_last_entry - get the last element from a list
|
|
* @ptr: the list head to take the element from.
|
|
* @type: the type of the struct this is embedded in.
|
|
* @member: the name of the list_head within the struct.
|
|
*
|
|
* Note, that list is expected to be not empty.
|
|
*/
|
|
#define list_last_entry(ptr, type, member) \
|
|
list_entry((ptr)->prev, type, member)
|
|
|
|
/**
|
|
* list_first_entry_or_null - get the first element from a list
|
|
* @ptr: the list head to take the element from.
|
|
* @type: the type of the struct this is embedded in.
|
|
* @member: the name of the list_head within the struct.
|
|
*
|
|
* Note that if the list is empty, it returns NULL.
|
|
*/
|
|
#define list_first_entry_or_null(ptr, type, member) \
|
|
(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
|
|
|
|
/**
|
|
* list_next_entry - get the next element in list
|
|
* @pos: the type * to cursor
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_next_entry(pos, member) \
|
|
list_entry((pos)->member.next, typeof(*(pos)), member)
|
|
|
|
/**
|
|
* list_prev_entry - get the prev element in list
|
|
* @pos: the type * to cursor
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_prev_entry(pos, member) \
|
|
list_entry((pos)->member.prev, typeof(*(pos)), member)
|
|
|
|
/**
|
|
* list_for_each - iterate over a list
|
|
* @pos: the &struct list_head to use as a loop cursor.
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each(pos, head) \
|
|
for (pos = (head)->next; pos != (head); pos = pos->next)
|
|
|
|
/**
|
|
* list_for_each_prev - iterate over a list backwards
|
|
* @pos: the &struct list_head to use as a loop cursor.
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each_prev(pos, head) \
|
|
for (pos = (head)->prev; pos != (head); pos = 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 cursor.
|
|
* @n: another &struct list_head to use as temporary storage
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each_safe(pos, n, head) \
|
|
for (pos = (head)->next, n = pos->next; pos != (head); \
|
|
pos = n, n = pos->next)
|
|
|
|
/**
|
|
* list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
|
|
* @pos: the &struct list_head to use as a loop cursor.
|
|
* @n: another &struct list_head to use as temporary storage
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each_prev_safe(pos, n, head) \
|
|
for (pos = (head)->prev, n = pos->prev; \
|
|
pos != (head); \
|
|
pos = n, n = pos->prev)
|
|
|
|
/**
|
|
* list_for_each_entry - iterate over list of given type
|
|
* @pos: the type * to use as a loop cursor.
|
|
* @head: the head for your list.
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_for_each_entry(pos, head, member) \
|
|
for (pos = list_first_entry(head, typeof(*pos), member); \
|
|
&pos->member != (head); \
|
|
pos = list_next_entry(pos, member))
|
|
|
|
/**
|
|
* list_for_each_entry_reverse - iterate backwards over list of given type.
|
|
* @pos: the type * to use as a loop cursor.
|
|
* @head: the head for your list.
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_for_each_entry_reverse(pos, head, member) \
|
|
for (pos = list_last_entry(head, typeof(*pos), member); \
|
|
&pos->member != (head); \
|
|
pos = list_prev_entry(pos, member))
|
|
|
|
/**
|
|
* list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue()
|
|
* @pos: the type * to use as a start point
|
|
* @head: the head of the list
|
|
* @member: the name of the list_head within the struct.
|
|
*
|
|
* Prepares a pos entry for use as a start point in list_for_each_entry_continue().
|
|
*/
|
|
#define list_prepare_entry(pos, head, member) \
|
|
((pos) ? : list_entry(head, typeof(*pos), member))
|
|
|
|
/**
|
|
* list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
|
|
* @pos: the type * to use as a loop cursor.
|
|
* @n: another type * to use as temporary storage
|
|
* @head: the head for your list.
|
|
* @member: the name of the list_head within the struct.
|
|
*/
|
|
#define list_for_each_entry_safe(pos, n, head, member) \
|
|
for (pos = list_first_entry(head, typeof(*pos), member), \
|
|
n = list_next_entry(pos, member); \
|
|
&pos->member != (head); \
|
|
pos = n, n = list_next_entry(n, member))
|
|
|
|
|
|
#endif
|