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/*
* Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*
* @file list.h
* @brief List primitives for libmetal.
*/
#ifndef __METAL_LIST__H__
#define __METAL_LIST__H__
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/** \defgroup list List Primitives
* @{ */
struct metal_list {
struct metal_list *next, *prev;
};
/*
* METAL_INIT_LIST - used for initializing an list elmenet in a static struct
* or global
*/
#define METAL_INIT_LIST(name) { .next = &name, .prev = &name }
/*
* METAL_DECLARE_LIST - used for defining and initializing a global or
* static singleton list
*/
#define METAL_DECLARE_LIST(name) \
struct metal_list name = METAL_INIT_LIST(name)
static inline void metal_list_init(struct metal_list *list)
{
list->next = list->prev = list;
}
static void __attribute__ ((noinline)) metal_list_add_before(struct metal_list *node,
struct metal_list *new_node)
{
new_node->prev = node->prev;
new_node->next = node;
new_node->next->prev = new_node;
new_node->prev->next = new_node;
}
static inline void metal_list_add_after(struct metal_list *node,
struct metal_list *new_node)
{
new_node->prev = node;
new_node->next = node->next;
new_node->next->prev = new_node;
new_node->prev->next = new_node;
}
static inline void metal_list_add_head(struct metal_list *list,
struct metal_list *node)
{
metal_list_add_after(list, node);
}
static inline void metal_list_add_tail(struct metal_list *list,
struct metal_list *node)
{
metal_list_add_before(list, node);
}
static inline int metal_list_is_empty(struct metal_list *list)
{
return list->next == list;
}
static inline void metal_list_del(struct metal_list *node)
{
node->next->prev = node->prev;
node->prev->next = node->next;
node->next = node->prev = node;
}
static inline struct metal_list *metal_list_first(struct metal_list *list)
{
return metal_list_is_empty(list) ? NULL : list->next;
}
#define metal_list_for_each(list, node) \
for ((node) = (list)->next; \
(node) != (list); \
(node) = (node)->next)
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* __METAL_LIST__H__ */
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