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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef NVGPU_LIST_H
#define NVGPU_LIST_H
struct nvgpu_list_node {
struct nvgpu_list_node *prev;
struct nvgpu_list_node *next;
};
static inline void nvgpu_init_list_node(struct nvgpu_list_node *node)
{
node->prev = node;
node->next = node;
}
static inline void nvgpu_list_add(struct nvgpu_list_node *new_node, struct nvgpu_list_node *head)
{
new_node->next = head->next;
new_node->next->prev = new_node;
new_node->prev = head;
head->next = new_node;
}
static inline void nvgpu_list_add_tail(struct nvgpu_list_node *new_node, struct nvgpu_list_node *head)
{
new_node->prev = head->prev;
new_node->prev->next = new_node;
new_node->next = head;
head->prev = new_node;
}
static inline void nvgpu_list_del(struct nvgpu_list_node *node)
{
node->prev->next = node->next;
node->next->prev = node->prev;
nvgpu_init_list_node(node);
}
static inline int nvgpu_list_empty(struct nvgpu_list_node *head)
{
return head->next == head;
}
static inline void nvgpu_list_move(struct nvgpu_list_node *node, struct nvgpu_list_node *head)
{
nvgpu_list_del(node);
nvgpu_list_add(node, head);
}
static inline void nvgpu_list_replace_init(struct nvgpu_list_node *old_node, struct nvgpu_list_node *new_node)
{
new_node->next = old_node->next;
new_node->next->prev = new_node;
new_node->prev = old_node->prev;
new_node->prev->next = new_node;
nvgpu_init_list_node(old_node);
}
#define nvgpu_list_entry(ptr, type, member) \
type ## _from_ ## member(ptr)
#define nvgpu_list_next_entry(pos, type, member) \
nvgpu_list_entry((pos)->member.next, type, member)
#define nvgpu_list_first_entry(ptr, type, member) \
nvgpu_list_entry((ptr)->next, type, member)
#define nvgpu_list_for_each_entry(pos, head, type, member) \
for (pos = nvgpu_list_first_entry(head, type, member); \
&pos->member != (head); \
pos = nvgpu_list_next_entry(pos, type, member))
#define nvgpu_list_for_each_entry_safe(pos, n, head, type, member) \
for (pos = nvgpu_list_first_entry(head, type, member), \
n = nvgpu_list_next_entry(pos, type, member); \
&pos->member != (head); \
pos = n, n = nvgpu_list_next_entry(n, type, member))
#endif /* NVGPU_LIST_H */
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