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- /*
- * safe_list - linked list protected against recursive iteration with deletes
- *
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
- /*
- * Use this linked list implementation as a replacement for list.h if you
- * want to allow deleting arbitrary list entries from within one or more
- * recursive iterator calling context
- */
- #ifndef __LIBUBOX_SAFE_LIST_H
- #define __LIBUBOX_SAFE_LIST_H
- #include <stdbool.h>
- #include "list.h"
- #include "utils.h"
- struct safe_list;
- struct safe_list_iterator;
- struct safe_list {
- struct list_head list;
- struct safe_list_iterator *i;
- };
- int safe_list_for_each(struct safe_list *list,
- int (*cb)(void *ctx, struct safe_list *list),
- void *ctx);
- void safe_list_add(struct safe_list *list, struct safe_list *head);
- void safe_list_add_first(struct safe_list *list, struct safe_list *head);
- void safe_list_del(struct safe_list *list);
- #define INIT_SAFE_LIST(_head) \
- do { \
- INIT_LIST_HEAD(_head.list); \
- (_head)->i = NULL; \
- } while (0)
- #define SAFE_LIST_INIT(_name) { LIST_HEAD_INIT(_name.list), NULL }
- #define SAFE_LIST(_name) struct safe_list _name = SAFE_LIST_INIT(_name)
- static inline bool safe_list_empty(struct safe_list *head)
- {
- return list_empty(&head->list);
- }
- #endif
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