77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
/*
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* SPDX-FileCopyrightText: Copyright (c) 2013-2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __NV_LIST_HELPERS_H__
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#define __NV_LIST_HELPERS_H__
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#include <linux/list.h>
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#include "conftest.h"
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/*
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* list_first_entry_or_null added by commit 6d7581e62f8b ("list: introduce
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* list_first_entry_or_null") in v3.10 (2013-05-29).
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*/
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#if !defined(list_first_entry_or_null)
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#define list_first_entry_or_null(ptr, type, member) \
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(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
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#endif
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/*
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* Added by commit 93be3c2eb337 ("list: introduce list_last_entry(), use
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* list_{first,last}_entry()") in v3.13 (2013-11-12).
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*/
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#if !defined(list_last_entry)
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#define list_last_entry(ptr, type, member) \
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list_entry((ptr)->prev, type, member)
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#endif
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/* list_last_entry_or_null() doesn't actually exist in the kernel */
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#if !defined(list_last_entry_or_null)
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#define list_last_entry_or_null(ptr, type, member) \
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(!list_empty(ptr) ? list_last_entry(ptr, type, member) : NULL)
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#endif
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/*
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* list_prev_entry() and list_next_entry added by commit 008208c6b26f
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* ("list: introduce list_next_entry() and list_prev_entry()") in
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* v3.13 (2013-11-12).
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*/
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#if !defined(list_prev_entry)
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#define list_prev_entry(pos, member) \
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list_entry((pos)->member.prev, typeof(*(pos)), member)
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#endif
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#if !defined(list_next_entry)
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#define list_next_entry(pos, member) \
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list_entry((pos)->member.next, typeof(*(pos)), member)
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#endif
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#if !defined(NV_LIST_IS_FIRST_PRESENT)
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static inline int list_is_first(const struct list_head *list,
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const struct list_head *head)
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{
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return list->prev == head;
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}
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#endif
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#endif // __NV_LIST_HELPERS_H__
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