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/*
* Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LIST_H
#define LIST_H 1
/* Doubly linked list. */
#include <stdbool.h>
#include <stddef.h>
#include "util.h"
/* Doubly linked list head or element. */
struct list {
struct list *prev; /* Previous list element. */
struct list *next; /* Next list element. */
};
#define LIST_INITIALIZER(LIST) { LIST, LIST }
void list_init(struct list *);
void list_poison(struct list *);
/* List insertion. */
void list_insert(struct list *, struct list *);
void list_splice(struct list *before, struct list *first, struct list *last);
void list_push_front(struct list *, struct list *);
void list_push_back(struct list *, struct list *);
void list_replace(struct list *, const struct list *);
void list_moved(struct list *);
/* List removal. */
struct list *list_remove(struct list *);
struct list *list_pop_front(struct list *);
struct list *list_pop_back(struct list *);
/* List elements. */
struct list *list_front(const struct list *);
struct list *list_back(const struct list *);
/* List properties. */
size_t list_size(const struct list *);
bool list_is_empty(const struct list *);
bool list_is_singleton(const struct list *);
bool list_is_short(const struct list *);
#define LIST_FOR_EACH(ITER, MEMBER, LIST) \
for (ASSIGN_CONTAINER(ITER, (LIST)->next, MEMBER); \
&(ITER)->MEMBER != (LIST); \
ASSIGN_CONTAINER(ITER, (ITER)->MEMBER.next, MEMBER))
#define LIST_FOR_EACH_REVERSE(ITER, MEMBER, LIST) \
for (ASSIGN_CONTAINER(ITER, (LIST)->prev, MEMBER); \
&(ITER)->MEMBER != (LIST); \
ASSIGN_CONTAINER(ITER, (ITER)->MEMBER.prev, MEMBER))
#define LIST_FOR_EACH_SAFE(ITER, NEXT, MEMBER, LIST) \
for (ASSIGN_CONTAINER(ITER, (LIST)->next, MEMBER); \
(&(ITER)->MEMBER != (LIST) \
? ASSIGN_CONTAINER(NEXT, (ITER)->MEMBER.next, MEMBER) \
: 0); \
(ITER) = (NEXT))
#endif /* list.h */
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