270 lines
7.9 KiB
C
270 lines
7.9 KiB
C
|
/**
|
||
|
* @file bflb_list.h
|
||
|
*
|
||
|
* Copyright (c) 2021 Bouffalolab team
|
||
|
*
|
||
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||
|
* contributor license agreements. See the NOTICE file distributed with
|
||
|
* this work for additional information regarding copyright ownership. The
|
||
|
* ASF licenses this file to you 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 _BFLB_LIST_H
|
||
|
#define _BFLB_LIST_H
|
||
|
|
||
|
#include "string.h"
|
||
|
#include "stdint.h"
|
||
|
|
||
|
#ifdef __cplusplus
|
||
|
extern "C" {
|
||
|
#endif
|
||
|
|
||
|
/**
|
||
|
* container_of - return the member address of ptr, if the type of ptr is the
|
||
|
* struct type.
|
||
|
*/
|
||
|
#define bflb_container_of(ptr, type, member) \
|
||
|
((type *)((char *)(ptr) - (unsigned long)(&((type *)0)->member)))
|
||
|
|
||
|
/**
|
||
|
* Double List structure
|
||
|
*/
|
||
|
struct bflb_dlist_node {
|
||
|
struct bflb_dlist_node *next; /**< point to next node. */
|
||
|
struct bflb_dlist_node *prev; /**< point to prev node. */
|
||
|
};
|
||
|
typedef struct bflb_dlist_node bflb_dlist_t; /**< Type for lists. */
|
||
|
|
||
|
/**
|
||
|
* @brief initialize a list
|
||
|
*
|
||
|
* @param l list to be initialized
|
||
|
*/
|
||
|
static inline void bflb_dlist_init(bflb_dlist_t *l)
|
||
|
{
|
||
|
l->next = l->prev = l;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief insert a node after a list
|
||
|
*
|
||
|
* @param l list to insert it
|
||
|
* @param n new node to be inserted
|
||
|
*/
|
||
|
static inline void bflb_dlist_insert_after(bflb_dlist_t *l, bflb_dlist_t *n)
|
||
|
{
|
||
|
l->next->prev = n;
|
||
|
n->next = l->next;
|
||
|
|
||
|
l->next = n;
|
||
|
n->prev = l;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief insert a node before a list
|
||
|
*
|
||
|
* @param n new node to be inserted
|
||
|
* @param l list to insert it
|
||
|
*/
|
||
|
static inline void bflb_dlist_insert_before(bflb_dlist_t *l, bflb_dlist_t *n)
|
||
|
{
|
||
|
l->prev->next = n;
|
||
|
n->prev = l->prev;
|
||
|
|
||
|
l->prev = n;
|
||
|
n->next = l;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief remove node from list.
|
||
|
* @param n the node to remove from the list.
|
||
|
*/
|
||
|
static inline void bflb_dlist_remove(bflb_dlist_t *n)
|
||
|
{
|
||
|
n->next->prev = n->prev;
|
||
|
n->prev->next = n->next;
|
||
|
|
||
|
n->next = n->prev = n;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief move node from list.
|
||
|
* @param n the node to remove from the list.
|
||
|
*/
|
||
|
static inline void bflb_dlist_move_head(bflb_dlist_t *l, bflb_dlist_t *n)
|
||
|
{
|
||
|
bflb_dlist_remove(n);
|
||
|
bflb_dlist_insert_after(l, n);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief move node from list.
|
||
|
* @param n the node to remove from the list.
|
||
|
*/
|
||
|
static inline void bflb_dlist_move_tail(bflb_dlist_t *l, bflb_dlist_t *n)
|
||
|
{
|
||
|
bflb_dlist_remove(n);
|
||
|
bflb_dlist_insert_before(l, n);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief tests whether a list is empty
|
||
|
* @param l the list to test.
|
||
|
*/
|
||
|
static inline int bflb_dlist_isempty(const bflb_dlist_t *l)
|
||
|
{
|
||
|
return l->next == l;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief get the list length
|
||
|
* @param l the list to get.
|
||
|
*/
|
||
|
static inline unsigned int bflb_dlist_len(const bflb_dlist_t *l)
|
||
|
{
|
||
|
unsigned int len = 0;
|
||
|
const bflb_dlist_t *p = l;
|
||
|
|
||
|
while (p->next != l) {
|
||
|
p = p->next;
|
||
|
len++;
|
||
|
}
|
||
|
|
||
|
return len;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief initialize a dlist object
|
||
|
*/
|
||
|
#define DLIST_OBJECT_INIT(object) \
|
||
|
{ \
|
||
|
&(object), &(object) \
|
||
|
}
|
||
|
/**
|
||
|
* @brief initialize a dlist object
|
||
|
*/
|
||
|
#define DLIST_DEFINE(list) \
|
||
|
bflb_dlist_t list = { &(list), &(list) }
|
||
|
|
||
|
/**
|
||
|
* @brief get the struct for this entry
|
||
|
* @param node the entry point
|
||
|
* @param type the type of structure
|
||
|
* @param member the name of list in structure
|
||
|
*/
|
||
|
#define bflb_dlist_entry(node, type, member) \
|
||
|
bflb_container_of(node, type, member)
|
||
|
|
||
|
/**
|
||
|
* dlist_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 bflb_dlist_first_entry(ptr, type, member) \
|
||
|
bflb_dlist_entry((ptr)->next, type, member)
|
||
|
/**
|
||
|
* dlist_first_entry_or_null - 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 bflb_dlist_first_entry_or_null(ptr, type, member) \
|
||
|
(bflb_dlist_isempty(ptr) ? NULL : bflb_dlist_first_entry(ptr, type, member))
|
||
|
|
||
|
/**
|
||
|
* dlist_for_each - iterate over a list
|
||
|
* @pos: the dlist_t * to use as a loop cursor.
|
||
|
* @head: the head for your list.
|
||
|
*/
|
||
|
#define bflb_dlist_for_each(pos, head) \
|
||
|
for (pos = (head)->next; pos != (head); pos = pos->next)
|
||
|
|
||
|
/**
|
||
|
* dlist_for_each_prev - iterate over a list
|
||
|
* @pos: the dlist_t * to use as a loop cursor.
|
||
|
* @head: the head for your list.
|
||
|
*/
|
||
|
#define bflb_dlist_for_each_prev(pos, head) \
|
||
|
for (pos = (head)->prev; pos != (head); pos = pos->prev)
|
||
|
|
||
|
/**
|
||
|
* dlist_for_each_safe - iterate over a list safe against removal of list entry
|
||
|
* @pos: the dlist_t * to use as a loop cursor.
|
||
|
* @n: another dlist_t * to use as temporary storage
|
||
|
* @head: the head for your list.
|
||
|
*/
|
||
|
#define bflb_dlist_for_each_safe(pos, n, head) \
|
||
|
for (pos = (head)->next, n = pos->next; pos != (head); \
|
||
|
pos = n, n = pos->next)
|
||
|
|
||
|
#define bflb_dlist_for_each_prev_safe(pos, n, head) \
|
||
|
for (pos = (head)->prev, n = pos->prev; pos != (head); \
|
||
|
pos = n, n = pos->prev)
|
||
|
/**
|
||
|
* dlist_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 bflb_dlist_for_each_entry(pos, head, member) \
|
||
|
for (pos = bflb_dlist_entry((head)->next, typeof(*pos), member); \
|
||
|
&pos->member != (head); \
|
||
|
pos = bflb_dlist_entry(pos->member.next, typeof(*pos), member))
|
||
|
|
||
|
/**
|
||
|
* dlist_for_each_entry_reverse - 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 bflb_dlist_for_each_entry_reverse(pos, head, member) \
|
||
|
for (pos = bflb_dlist_entry((head)->prev, typeof(*pos), member); \
|
||
|
&pos->member != (head); \
|
||
|
pos = bflb_dlist_entry(pos->member.prev, typeof(*pos), member))
|
||
|
|
||
|
/**
|
||
|
* dlist_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 bflb_dlist_for_each_entry_safe(pos, n, head, member) \
|
||
|
for (pos = bflb_dlist_entry((head)->next, typeof(*pos), member), \
|
||
|
n = bflb_dlist_entry(pos->member.next, typeof(*pos), member); \
|
||
|
&pos->member != (head); \
|
||
|
pos = n, n = bflb_dlist_entry(n->member.next, typeof(*n), member))
|
||
|
|
||
|
/**
|
||
|
* dlist_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 bflb_dlist_for_each_entry_safe_reverse(pos, n, head, member) \
|
||
|
for (pos = bflb_dlist_entry((head)->prev, typeof(*pos), field), \
|
||
|
n = bflb_dlist_entry(pos->member.prev, typeof(*pos), member); \
|
||
|
&pos->member != (head); \
|
||
|
pos = n, n = bflb_dlist_entry(pos->member.prev, typeof(*pos), member))
|
||
|
|
||
|
#ifdef __cplusplus
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#endif
|