+++ /dev/null
-/*
- * Copyright (C) 2002 Free Software Foundation, Inc.
- * (originally part of the GNU C Library)
- * Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
- *
- * Copyright (C) 2009 Pierre-Marc Fournier
- * Conversion to RCU list.
- * Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef _CDS_LIST_H
-#define _CDS_LIST_H 1
-
-/*
- * The definitions of this file are adopted from those which can be
- * found in the Linux kernel headers to enable people familiar with the
- * latter find their way in these sources as well.
- */
-
-/* Basic type for the double-link list. */
-struct cds_list_head {
- struct cds_list_head *next, *prev;
-};
-
-/* Define a variable with the head and tail of the list. */
-#define CDS_LIST_HEAD(name) \
- struct cds_list_head name = { &(name), &(name) }
-
-/* Initialize a new list head. */
-#define CDS_INIT_LIST_HEAD(ptr) \
- (ptr)->next = (ptr)->prev = (ptr)
-
-#define CDS_LIST_HEAD_INIT(name) { .prev = &(name), .next = &(name) }
-
-/* Add new element at the head of the list. */
-static inline
-void cds_list_add(struct cds_list_head *newp, struct cds_list_head *head)
-{
- head->next->prev = newp;
- newp->next = head->next;
- newp->prev = head;
- head->next = newp;
-}
-
-/* Add new element at the tail of the list. */
-static inline
-void cds_list_add_tail(struct cds_list_head *newp, struct cds_list_head *head)
-{
- head->prev->next = newp;
- newp->next = head;
- newp->prev = head->prev;
- head->prev = newp;
-}
-
-/* Remove element from list. */
-static inline
-void __cds_list_del(struct cds_list_head *prev, struct cds_list_head *next)
-{
- next->prev = prev;
- prev->next = next;
-}
-
-/* Remove element from list. */
-static inline
-void cds_list_del(struct cds_list_head *elem)
-{
- __cds_list_del(elem->prev, elem->next);
-}
-
-/* Remove element from list, initializing the element's list pointers. */
-static inline
-void cds_list_del_init(struct cds_list_head *elem)
-{
- cds_list_del(elem);
- CDS_INIT_LIST_HEAD(elem);
-}
-
-/* Delete from list, add to another list as head. */
-static inline
-void cds_list_move(struct cds_list_head *elem, struct cds_list_head *head)
-{
- __cds_list_del(elem->prev, elem->next);
- cds_list_add(elem, head);
-}
-
-/* Replace an old entry. */
-static inline
-void cds_list_replace(struct cds_list_head *old, struct cds_list_head *_new)
-{
- _new->next = old->next;
- _new->prev = old->prev;
- _new->prev->next = _new;
- _new->next->prev = _new;
-}
-
-/* Join two lists. */
-static inline
-void cds_list_splice(struct cds_list_head *add, struct cds_list_head *head)
-{
- /* Do nothing if the list which gets added is empty. */
- if (add != add->next) {
- add->next->prev = head;
- add->prev->next = head->next;
- head->next->prev = add->prev;
- head->next = add->next;
- }
-}
-
-/* Get typed element from list at a given position. */
-#define cds_list_entry(ptr, type, member) \
- ((type *) ((char *) (ptr) - (unsigned long) (&((type *) 0)->member)))
-
-
-/* Get first entry from a list. */
-#define cds_list_first_entry(ptr, type, member) \
- cds_list_entry((ptr)->next, type, member)
-
-/* Iterate forward over the elements of the list. */
-#define cds_list_for_each(pos, head) \
- for (pos = (head)->next; pos != (head); pos = pos->next)
-
-/*
- * Iterate forward over the elements list. The list elements can be
- * removed from the list while doing this.
- */
-#define cds_list_for_each_safe(pos, p, head) \
- for (pos = (head)->next, p = pos->next; \
- pos != (head); \
- pos = p, p = pos->next)
-
-/* Iterate backward over the elements of the list. */
-#define cds_list_for_each_prev(pos, head) \
- for (pos = (head)->prev; pos != (head); pos = pos->prev)
-
-/*
- * Iterate backwards over the elements list. The list elements can be
- * removed from the list while doing this.
- */
-#define cds_list_for_each_prev_safe(pos, p, head) \
- for (pos = (head)->prev, p = pos->prev; \
- pos != (head); \
- pos = p, p = pos->prev)
-
-#define cds_list_for_each_entry(pos, head, member) \
- for (pos = cds_list_entry((head)->next, __typeof__(*pos), member); \
- &pos->member != (head); \
- pos = cds_list_entry(pos->member.next, __typeof__(*pos), member))
-
-#define cds_list_for_each_entry_reverse(pos, head, member) \
- for (pos = cds_list_entry((head)->prev, __typeof__(*pos), member); \
- &pos->member != (head); \
- pos = cds_list_entry(pos->member.prev, __typeof__(*pos), member))
-
-#define cds_list_for_each_entry_safe(pos, p, head, member) \
- for (pos = cds_list_entry((head)->next, __typeof__(*pos), member), \
- p = cds_list_entry(pos->member.next, __typeof__(*pos), member); \
- &pos->member != (head); \
- pos = p, p = cds_list_entry(pos->member.next, __typeof__(*pos), member))
-
-/*
- * Same as cds_list_for_each_entry_safe, but starts from "pos" which should
- * point to an entry within the list.
- */
-#define cds_list_for_each_entry_safe_from(pos, p, head, member) \
- for (p = cds_list_entry(pos->member.next, __typeof__(*pos), member); \
- &pos->member != (head); \
- pos = p, p = cds_list_entry(pos->member.next, __typeof__(*pos), member))
-
-static inline
-int cds_list_empty(struct cds_list_head *head)
-{
- return head == head->next;
-}
-
-static inline
-void cds_list_replace_init(struct cds_list_head *old,
- struct cds_list_head *_new)
-{
- struct cds_list_head *head = old->next;
-
- cds_list_del(old);
- cds_list_add_tail(_new, head);
- CDS_INIT_LIST_HEAD(old);
-}
-
-#endif /* _CDS_LIST_H */
projects / urcu.git / blobdiff