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/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#ifndef IGT_LIST_H
#define IGT_LIST_H
#include <stdbool.h>
#include <stddef.h>
/*
* This list data structure is a verbatim copy from wayland-util.h from the
* Wayland project; except that wl_ prefix has been removed.
*/
struct igt_list {
struct igt_list *prev;
struct igt_list *next;
};
#define __IGT_INIT_LIST(name) { &(name), &(name) }
#define IGT_LIST(name) struct igt_list name = __IGT_INIT_LIST(name)
static inline void igt_list_init(struct igt_list *list)
{
list->prev = list;
list->next = list;
}
static inline void __igt_list_add(struct igt_list *list,
struct igt_list *prev,
struct igt_list *next)
{
next->prev = list;
list->next = next;
list->prev = prev;
prev->next = list;
}
static inline void igt_list_add(struct igt_list *elm, struct igt_list *list)
{
__igt_list_add(elm, list, list->next);
}
static inline void igt_list_add_tail(struct igt_list *elm,
struct igt_list *list)
{
__igt_list_add(elm, list->prev, list);
}
static inline void __igt_list_del(struct igt_list *prev, struct igt_list *next)
{
next->prev = prev;
prev->next = next;
}
static inline void igt_list_del(struct igt_list *elm)
{
__igt_list_del(elm->prev, elm->next);
}
static inline void igt_list_move(struct igt_list *elm, struct igt_list *list)
{
igt_list_del(elm);
igt_list_add(elm, list);
}
static inline void igt_list_move_tail(struct igt_list *elm,
struct igt_list *list)
{
igt_list_del(elm);
igt_list_add_tail(elm, list);
}
static inline bool igt_list_empty(const struct igt_list *list)
{
return list->next == list;
}
#define container_of(ptr, sample, member) \
(typeof(sample))((char *)(ptr) - offsetof(typeof(*sample), member))
#define igt_list_first_entry(head, pos, member) \
container_of((head)->next, (pos), member)
#define igt_list_last_entry(head, pos, member) \
container_of((head)->prev, (pos), member)
#define igt_list_next_entry(pos, member) \
container_of((pos)->member.next, (pos), member)
#define igt_list_prev_entry(pos, member) \
container_of((pos)->member.prev, (pos), member)
#define igt_list_for_each(pos, head, member) \
for (pos = igt_list_first_entry(head, pos, member); \
&pos->member != (head); \
pos = igt_list_next_entry(pos, member))
#define igt_list_for_each_reverse(pos, head, member) \
for (pos = igt_list_last_entry(head, pos, member); \
&pos->member != (head); \
pos = igt_list_prev_entry(pos, member))
#define igt_list_for_each_safe(pos, tmp, head, member) \
for (pos = igt_list_first_entry(head, pos, member), \
tmp = igt_list_next_entry(pos, member); \
&pos->member != (head); \
pos = tmp, tmp = igt_list_next_entry(pos, member))
#endif /* IGT_LIST_H */
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