vlist.h

Go to the documentation of this file.

/*
 * Copyright (C) 2012 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.
 */
 
#ifndef __LIBUBOX_VLIST_H
#define __LIBUBOX_VLIST_H
 
#include "avl.h"
 
struct vlist_tree;
struct vlist_node;
 
typedef void (*vlist_update_cb)(struct vlist_tree *tree,
                                struct vlist_node *node_new,
                                struct vlist_node *node_old);
 
struct vlist_tree {
        struct avl_tree avl;
 
        vlist_update_cb update;
        bool keep_old;
        bool no_delete;
 
        int version;
};
 
struct vlist_node {
        struct avl_node avl;
        int version;
};
 
#define VLIST_TREE_INIT(_name, _comp, _update, _keep_old, _no_delete)   \
        {                                                               \
                .avl = AVL_TREE_INIT(_name.avl, _comp, false, NULL),    \
                .update = _update,                                      \
                .version = 1,                                           \
                .keep_old = _keep_old,                                  \
                .no_delete = _no_delete,                                \
        }
 
#define VLIST_TREE(_name, ...)                                          \
        struct vlist_tree _name =                                       \
                VLIST_TREE_INIT(_name, __VA_ARGS__)
 
void vlist_init(struct vlist_tree *tree, avl_tree_comp cmp, vlist_update_cb update);
 
#define vlist_find(tree, name, element, node_member) \
        avl_find_element(&(tree)->avl, name, element, node_member.avl)
 
static inline void vlist_update(struct vlist_tree *tree)
{
        tree->version++;
}
 
void vlist_add(struct vlist_tree *tree, struct vlist_node *node, const void *key);
void vlist_delete(struct vlist_tree *tree, struct vlist_node *node);
void vlist_flush(struct vlist_tree *tree);
void vlist_flush_all(struct vlist_tree *tree);
 
#define vlist_for_each_element(tree, element, node_member) \
        avl_for_each_element(&(tree)->avl, element, node_member.avl)
 
#define vlist_for_each_element_safe(tree, element, node_member, ptr) \
        avl_for_each_element_safe(&(tree)->avl, element, node_member.avl, ptr)
 
#define vlist_for_each_element_reverse(tree, element, node_member) \
        avl_for_each_element_reverse(&(tree)->avl, element, node_member.avl)
 
#define vlist_for_first_to_element(tree, last, element, node_member) \
        avl_for_element_range(avl_first_element(&(tree)->avl, element, node_member.avl), last, element, node_member.avl)
 
#define vlist_for_first_to_element_reverse(tree, last, element, node_member) \
        avl_for_element_range_reverse(avl_first_element(&(tree)->avl, element, node_member.avl), last, element, node_member.avl)
 
#define vlist_for_element_to_last(tree, first, element, node_member) \
        avl_for_element_range(first, avl_last_element(&(tree)->avl, element, node_member.avl), element, node_member.avl)
 
#define vlist_for_element_to_last_reverse(tree, first, element, node_member) \
        avl_for_element_range_reverse(first, avl_last_element(&(tree)->avl, element, node_member.avl), element, node_member.avl)
 
#endif