}
}
-/* Taken from the Linux kernel source tree, so GPLv2-only!!! */
-
-#ifndef _LINUX_LIST_H
-#define _LINUX_LIST_H
-
-#define LIST_POISON1 ((void *) 0x00100100)
-#define LIST_POISON2 ((void *) 0x00200200)
-
-#if 0
-/*
- * 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 cds_list_head {
- struct cds_list_head *next, *prev;
-};
-
-#define CDS_LIST_HEAD_INIT(name) { &(name), &(name) }
-
-#define CDS_LIST_HEAD(name) \
- struct cds_list_head name = CDS_LIST_HEAD_INIT(name)
-
-static inline void CDS_INIT_LIST_HEAD(struct cds_list_head *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!
- */
-#ifndef CONFIG_DEBUG_LIST
-static inline void __cds_list_add(struct cds_list_head *new,
- struct cds_list_head *prev,
- struct cds_list_head *next)
-{
- next->prev = new;
- new->next = next;
- new->prev = prev;
- prev->next = new;
-}
-#else
-extern void __cds_list_add(struct cds_list_head *new,
- struct cds_list_head *prev,
- struct cds_list_head *next);
-#endif
-
-/**
- * cds_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 cds_list_add(struct cds_list_head *new, struct cds_list_head *head)
-{
- __cds_list_add(new, head, head->next);
-}
-
-
-/**
- * cds_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 cds_list_add_tail(struct cds_list_head *new, struct cds_list_head *head)
-{
- __cds_list_add(new, 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 __cds_list_del(struct cds_list_head * prev, struct cds_list_head * next)
-{
- next->prev = prev;
- prev->next = next;
-}
-
-/**
- * cds_list_del - deletes entry from list.
- * @entry: the element to delete from the list.
- * Note: cds_list_empty() on entry does not return true after this, the entry is
- * in an undefined state.
- */
-#ifndef CONFIG_DEBUG_LIST
-static inline void cds_list_del(struct cds_list_head *entry)
-{
- __cds_list_del(entry->prev, entry->next);
- entry->next = LIST_POISON1;
- entry->prev = LIST_POISON2;
-}
-#else
-extern void cds_list_del(struct cds_list_head *entry);
-#endif
-
-/**
- * cds_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 cds_list_replace(struct cds_list_head *old,
- struct cds_list_head *new)
-{
- new->next = old->next;
- new->next->prev = new;
- new->prev = old->prev;
- new->prev->next = new;
-}
-
-static inline void cds_list_replace_init(struct cds_list_head *old,
- struct cds_list_head *new)
-{
- cds_list_replace(old, new);
- CDS_INIT_LIST_HEAD(old);
-}
-
-/**
- * cds_list_del_init - deletes entry from list and reinitialize it.
- * @entry: the element to delete from the list.
- */
-static inline void cds_list_del_init(struct cds_list_head *entry)
-{
- __cds_list_del(entry->prev, entry->next);
- CDS_INIT_LIST_HEAD(entry);
-}
-
-/**
- * cds_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 cds_list_move(struct cds_list_head *list, struct cds_list_head *head)
-{
- __cds_list_del(list->prev, list->next);
- cds_list_add(list, head);
-}
-
-/**
- * cds_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 cds_list_move_tail(struct cds_list_head *list,
- struct cds_list_head *head)
-{
- __cds_list_del(list->prev, list->next);
- cds_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 struct cds_list_head *list,
- const struct cds_list_head *head)
-{
- return list->next == head;
-}
-
-/**
- * cds_list_empty - tests whether a list is empty
- * @head: the list to test.
- */
-static inline int cds_list_empty(const struct cds_list_head *head)
-{
- return head->next == head;
-}
-
-/**
- * cds_list_empty_careful - tests whether a list is empty and not being modified
- * @head: the list to test
- *
- * Description:
- * tests whether a list is empty _and_ checks that no other CPU might be
- * in the process of modifying either member (next or prev)
- *
- * NOTE: using cds_list_empty_careful() without synchronization
- * can only be safe if the only activity that can happen
- * to the list entry is cds_list_del_init(). Eg. it cannot be used
- * if another CPU could re-list_add() it.
- */
-static inline int cds_list_empty_careful(const struct cds_list_head *head)
-{
- struct cds_list_head *next = head->next;
- return (next == head) && (next == head->prev);
-}
-
-/**
- * list_is_singular - tests whether a list has just one entry.
- * @head: the list to test.
- */
-static inline int list_is_singular(const struct cds_list_head *head)
-{
- return !list_empty(head) && (head->next == head->prev);
-}
-
-static inline void __list_cut_position(struct cds_list_head *list,
- struct cds_list_head *head, struct cds_list_head *entry)
-{
- struct cds_list_head *new_first = entry->next;
- list->next = head->next;
- list->next->prev = list;
- list->prev = entry;
- entry->next = list;
- head->next = new_first;
- new_first->prev = head;
-}
-
-/**
- * list_cut_position - cut a list into two
- * @list: a new list to add all removed entries
- * @head: a list with entries
- * @entry: an entry within head, could be the head itself
- * and if so we won't cut the list
- *
- * This helper moves the initial part of @head, up to and
- * including @entry, from @head to @list. You should
- * pass on @entry an element you know is on @head. @list
- * should be an empty list or a list you do not care about
- * losing its data.
- *
- */
-static inline void list_cut_position(struct cds_list_head *list,
- struct cds_list_head *head, struct cds_list_head *entry)
-{
- if (cds_list_empty(head))
- return;
- if (list_is_singular(head) &&
- (head->next != entry && head != entry))
- return;
- if (entry == head)
- CDS_INIT_LIST_HEAD(list);
- else
- __list_cut_position(list, head, entry);
-}
-
-static inline void __cds_list_splice(const struct cds_list_head *list,
- struct cds_list_head *prev,
- struct cds_list_head *next)
-{
- struct cds_list_head *first = list->next;
- struct cds_list_head *last = list->prev;
-
- first->prev = prev;
- prev->next = first;
-
- last->next = next;
- next->prev = last;
-}
-
-/**
- * cds_list_splice - join two lists, this is designed for stacks
- * @list: the new list to add.
- * @head: the place to add it in the first list.
- */
-static inline void cds_list_splice(const struct cds_list_head *list,
- struct cds_list_head *head)
-{
- if (!cds_list_empty(list))
- __cds_list_splice(list, head, head->next);
-}
-
-/**
- * cds_list_splice_tail - join two lists, each list being a queue
- * @list: the new list to add.
- * @head: the place to add it in the first list.
- */
-static inline void cds_list_splice_tail(struct cds_list_head *list,
- struct cds_list_head *head)
-{
- if (!cds_list_empty(list))
- __cds_list_splice(list, head->prev, head);
-}
-
-/**
- * cds_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 cds_list_splice_init(struct cds_list_head *list,
- struct cds_list_head *head)
-{
- if (!cds_list_empty(list)) {
- __cds_list_splice(list, head, head->next);
- CDS_INIT_LIST_HEAD(list);
- }
-}
-
-/**
- * cds_list_splice_tail_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.
- *
- * Each of the lists is a queue.
- * The list at @list is reinitialised
- */
-static inline void cds_list_splice_tail_init(struct cds_list_head *list,
- struct cds_list_head *head)
-{
- if (!cds_list_empty(list)) {
- __cds_list_splice(list, head->prev, head);
- CDS_INIT_LIST_HEAD(list);
- }
-}
-
-/**
- * cds_list_entry - get the struct for this entry
- * @ptr: the &struct cds_list_head pointer.
- * @type: the type of the struct this is embedded in.
- * @member: the name of the list_struct within the struct.
- */
-#define cds_list_entry(ptr, type, member) \
- caa_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_struct within the struct.
- *
- * Note, that list is expected to be not empty.
- */
-#define list_first_entry(ptr, type, member) \
- cds_list_entry((ptr)->next, type, member)
-
-/**
- * cds_list_for_each - iterate over a list
- * @pos: the &struct cds_list_head to use as a loop cursor.
- * @head: the head for your list.
- */
-#define cds_list_for_each(pos, head) \
- for (pos = (head)->next; prefetch(pos->next), pos != (head); \
- pos = pos->next)
-
-/**
- * __cds_list_for_each - iterate over a list
- * @pos: the &struct cds_list_head to use as a loop cursor.
- * @head: the head for your list.
- *
- * This variant differs from cds_list_for_each() in that it's the
- * simplest possible list iteration code, no prefetching is done.
- * Use this for code that knows the list to be very short (empty
- * or 1 entry) most of the time.
- */
-#define __cds_list_for_each(pos, head) \
- for (pos = (head)->next; pos != (head); pos = pos->next)
-
-/**
- * cds_list_for_each_prev - iterate over a list backwards
- * @pos: the &struct cds_list_head to use as a loop cursor.
- * @head: the head for your list.
- */
-#define cds_list_for_each_prev(pos, head) \
- for (pos = (head)->prev; prefetch(pos->prev), pos != (head); \
- pos = pos->prev)
-
-/**
- * cds_list_for_each_safe - iterate over a list safe against removal of list entry
- * @pos: the &struct cds_list_head to use as a loop cursor.
- * @n: another &struct cds_list_head to use as temporary storage
- * @head: the head for your list.
- */
-#define cds_list_for_each_safe(pos, n, head) \
- for (pos = (head)->next, n = pos->next; pos != (head); \
- pos = n, n = pos->next)
-
-/**
- * cds_list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
- * @pos: the &struct cds_list_head to use as a loop cursor.
- * @n: another &struct cds_list_head to use as temporary storage
- * @head: the head for your list.
- */
-#define cds_list_for_each_prev_safe(pos, n, head) \
- for (pos = (head)->prev, n = pos->prev; \
- prefetch(pos->prev), pos != (head); \
- pos = n, n = pos->prev)
-
-/**
- * cds_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_struct within the struct.
- */
-#define cds_list_for_each_entry(pos, head, member) \
- for (pos = cds_list_entry((head)->next, typeof(*pos), member); \
- prefetch(pos->member.next), &pos->member != (head); \
- pos = cds_list_entry(pos->member.next, typeof(*pos), member))
-
-/**
- * cds_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_struct within the struct.
- */
-#define cds_list_for_each_entry_reverse(pos, head, member) \
- for (pos = cds_list_entry((head)->prev, typeof(*pos), member); \
- prefetch(pos->member.prev), &pos->member != (head); \
- pos = cds_list_entry(pos->member.prev, typeof(*pos), member))
-
-/**
- * list_prepare_entry - prepare a pos entry for use in cds_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_struct within the struct.
- *
- * Prepares a pos entry for use as a start point in cds_list_for_each_entry_continue().
- */
-#define list_prepare_entry(pos, head, member) \
- ((pos) ? : cds_list_entry(head, typeof(*pos), member))
-
-/**
- * cds_list_for_each_entry_continue - continue iteration 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_struct within the struct.
- *
- * Continue to iterate over list of given type, continuing after
- * the current position.
- */
-#define cds_list_for_each_entry_continue(pos, head, member) \
- for (pos = cds_list_entry(pos->member.next, typeof(*pos), member); \
- prefetch(pos->member.next), &pos->member != (head); \
- pos = cds_list_entry(pos->member.next, typeof(*pos), member))
-
-/**
- * cds_list_for_each_entry_continue_reverse - iterate backwards from the given point
- * @pos: the type * to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the list_struct within the struct.
- *
- * Start to iterate over list of given type backwards, continuing after
- * the current position.
- */
-#define cds_list_for_each_entry_continue_reverse(pos, head, member) \
- for (pos = cds_list_entry(pos->member.prev, typeof(*pos), member); \
- prefetch(pos->member.prev), &pos->member != (head); \
- pos = cds_list_entry(pos->member.prev, typeof(*pos), member))
-
-/**
- * cds_list_for_each_entry_from - iterate over list of given type from the current point
- * @pos: the type * to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the list_struct within the struct.
- *
- * Iterate over list of given type, continuing from current position.
- */
-#define cds_list_for_each_entry_from(pos, head, member) \
- for (; prefetch(pos->member.next), &pos->member != (head); \
- pos = cds_list_entry(pos->member.next, typeof(*pos), member))
-
-/**
- * cds_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_struct within the struct.
- */
-#define cds_list_for_each_entry_safe(pos, n, head, member) \
- for (pos = cds_list_entry((head)->next, typeof(*pos), member), \
- n = cds_list_entry(pos->member.next, typeof(*pos), member); \
- &pos->member != (head); \
- pos = n, n = cds_list_entry(n->member.next, typeof(*n), member))
-
-/**
- * cds_list_for_each_entry_safe_continue
- * @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_struct within the struct.
- *
- * Iterate over list of given type, continuing after current point,
- * safe against removal of list entry.
- */
-#define cds_list_for_each_entry_safe_continue(pos, n, head, member) \
- for (pos = cds_list_entry(pos->member.next, typeof(*pos), member), \
- n = cds_list_entry(pos->member.next, typeof(*pos), member); \
- &pos->member != (head); \
- pos = n, n = cds_list_entry(n->member.next, typeof(*n), member))
-
-/**
- * cds_list_for_each_entry_safe_from
- * @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_struct within the struct.
- *
- * Iterate over list of given type from current point, safe against
- * removal of list entry.
- */
-#define cds_list_for_each_entry_safe_from(pos, n, head, member) \
- for (n = cds_list_entry(pos->member.next, typeof(*pos), member); \
- &pos->member != (head); \
- pos = n, n = cds_list_entry(n->member.next, typeof(*n), member))
-
-/**
- * cds_list_for_each_entry_safe_reverse
- * @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_struct within the struct.
- *
- * Iterate backwards over list of given type, safe against removal
- * of list entry.
- */
-#define cds_list_for_each_entry_safe_reverse(pos, n, head, member) \
- for (pos = cds_list_entry((head)->prev, typeof(*pos), member), \
- n = cds_list_entry(pos->member.prev, typeof(*pos), member); \
- &pos->member != (head); \
- pos = n, n = cds_list_entry(n->member.prev, typeof(*n), member))
-
-#endif //0
-
-/*
- * Double linked lists with a single pointer list head.
- * Mostly useful for hash tables where the two pointer list head is
- * too wasteful.
- * You lose the ability to access the tail in O(1).
- */
-
-struct cds_hlist_head {
- struct cds_hlist_node *first;
-};
-
-struct cds_hlist_node {
- struct cds_hlist_node *next, **pprev;
-};
-
-#define HLIST_HEAD_INIT { .first = NULL }
-#define HLIST_HEAD(name) struct cds_hlist_head name = { .first = NULL }
-#define CDS_INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)
-static inline void INIT_HLIST_NODE(struct cds_hlist_node *h)
-{
- h->next = NULL;
- h->pprev = NULL;
-}
-
-static inline int hlist_unhashed(const struct cds_hlist_node *h)
-{
- return !h->pprev;
-}
-
-static inline int hlist_empty(const struct cds_hlist_head *h)
-{
- return !h->first;
-}
-
-static inline void __cds_hlist_del(struct cds_hlist_node *n)
-{
- struct cds_hlist_node *next = n->next;
- struct cds_hlist_node **pprev = n->pprev;
- *pprev = next;
- if (next)
- next->pprev = pprev;
-}
-
-static inline void cds_hlist_del(struct cds_hlist_node *n)
-{
- __cds_hlist_del(n);
- n->next = LIST_POISON1;
- n->pprev = LIST_POISON2;
-}
-
-static inline void cds_hlist_del_init(struct cds_hlist_node *n)
-{
- if (!hlist_unhashed(n)) {
- __cds_hlist_del(n);
- INIT_HLIST_NODE(n);
- }
-}
-
-static inline void cds_hlist_add_head(struct cds_hlist_node *n, struct cds_hlist_head *h)
-{
- struct cds_hlist_node *first = h->first;
- n->next = first;
- if (first)
- first->pprev = &n->next;
- h->first = n;
- n->pprev = &h->first;
-}
-
-/* next must be != NULL */
-static inline void hlist_add_before(struct cds_hlist_node *n,
- struct cds_hlist_node *next)
-{
- n->pprev = next->pprev;
- n->next = next;
- next->pprev = &n->next;
- *(n->pprev) = n;
-}
-
-static inline void hlist_add_after(struct cds_hlist_node *n,
- struct cds_hlist_node *next)
-{
- next->next = n->next;
- n->next = next;
- next->pprev = &n->next;
-
- if(next->next)
- next->next->pprev = &next->next;
-}
-
-/*
- * Move a list from one list head to another. Fixup the pprev
- * reference of the first entry if it exists.
- */
-static inline void hlist_move_list(struct cds_hlist_head *old,
- struct cds_hlist_head *new)
-{
- new->first = old->first;
- if (new->first)
- new->first->pprev = &new->first;
- old->first = NULL;
-}
-
-#define cds_hlist_entry(ptr, type, member) caa_container_of(ptr,type,member)
-
-#define cds_hlist_for_each(pos, head) \
- for (pos = (head)->first; pos && ({ prefetch(pos->next); 1; }); \
- pos = pos->next)
-
-#define cds_hlist_for_each_safe(pos, n, head) \
- for (pos = (head)->first; pos && ({ n = pos->next; 1; }); \
- pos = n)
-
-/**
- * cds_hlist_for_each_entry - iterate over list of given type
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct cds_hlist_node to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the cds_hlist_node within the struct.
- */
-#define cds_hlist_for_each_entry(tpos, pos, head, member) \
- for (pos = (head)->first; \
- pos && ({ prefetch(pos->next); 1;}) && \
- ({ tpos = cds_hlist_entry(pos, typeof(*tpos), member); 1;}); \
- pos = pos->next)
-
-/**
- * cds_hlist_for_each_entry_continue - iterate over a hlist continuing after current point
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct cds_hlist_node to use as a loop cursor.
- * @member: the name of the cds_hlist_node within the struct.
- */
-#define cds_hlist_for_each_entry_continue(tpos, pos, member) \
- for (pos = (pos)->next; \
- pos && ({ prefetch(pos->next); 1;}) && \
- ({ tpos = cds_hlist_entry(pos, typeof(*tpos), member); 1;}); \
- pos = pos->next)
-
-/**
- * cds_hlist_for_each_entry_from - iterate over a hlist continuing from current point
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct cds_hlist_node to use as a loop cursor.
- * @member: the name of the cds_hlist_node within the struct.
- */
-#define cds_hlist_for_each_entry_from(tpos, pos, member) \
- for (; pos && ({ prefetch(pos->next); 1;}) && \
- ({ tpos = cds_hlist_entry(pos, typeof(*tpos), member); 1;}); \
- pos = pos->next)
-
-/**
- * cds_hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct cds_hlist_node to use as a loop cursor.
- * @n: another &struct cds_hlist_node to use as temporary storage
- * @head: the head for your list.
- * @member: the name of the cds_hlist_node within the struct.
- */
-#define cds_hlist_for_each_entry_safe(tpos, pos, n, head, member) \
- for (pos = (head)->first; \
- pos && ({ n = pos->next; 1; }) && \
- ({ tpos = cds_hlist_entry(pos, typeof(*tpos), member); 1;}); \
- pos = n)
-
-#endif
-
#endif
projects / userspace-rcu.git / commitdiff
