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/* Copyright (c) 2015-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP list
* a simple implementation of Doubly linked list
*/
#ifndef ODPH_LIST_INTER_H_
#define ODPH_LIST_INTER_H_
#ifdef __cplusplus
extern "C" {
#endif
/** List object */
typedef struct odph_list_object {
/** Next element in list */
struct odph_list_object *next;
/** Previous element in list */
struct odph_list_object *prev;
} odph_list_object;
/** Head of list */
typedef odph_list_object odph_list_head;
/**
* @internal Intiailize list head element
*
* @param list List object to be initialized
*/
static inline void ODPH_INIT_LIST_HEAD(odph_list_object *list)
{
list->next = list;
list->prev = list;
}
/** @internal Inline function @param new @param prev @param next */
static inline void __odph_list_add(odph_list_object *new,
odph_list_object *prev,
odph_list_object *next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
/** @internal Inline function @param new @param head */
static inline void odph_list_add(odph_list_object *new, odph_list_object *head)
{
__odph_list_add(new, head, head->next);
}
/** @internal Inline function @param new @param head */
static inline void odph_list_add_tail(struct odph_list_object *new,
odph_list_object *head)
{
__odph_list_add(new, head->prev, head);
}
/** @internal Inline function @param prev @param next */
static inline void __odph_list_del(struct odph_list_object *prev,
odph_list_object *next)
{
next->prev = prev;
prev->next = next;
}
/** @internal Inline function @param entry */
static inline void odph_list_del(struct odph_list_object *entry)
{
__odph_list_del(entry->prev, entry->next);
ODPH_INIT_LIST_HEAD(entry);
}
/** @internal Inline function @param head @return */
static inline int odph_list_empty(const struct odph_list_object *head)
{
return head->next == head;
}
/** @internal */
#define container_of(ptr, type, list_node) \
((type *)(void *)((char *)ptr - offsetof(type, list_node)))
/** @internal */
#define ODPH_LIST_FOR_EACH(pos, list_head, type, list_node) \
for (pos = container_of((list_head)->next, type, list_node); \
&pos->list_node != (list_head); \
pos = container_of(pos->list_node.next, type, list_node))
#ifdef __cplusplus
}
#endif
#endif
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