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73 lines
3.6 KiB
73 lines
3.6 KiB
/* ----------------------------------------------------------------------------
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* Copyright (c) Huawei Technologies Co., Ltd. 2013-2019. All rights reserved.
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* Description: Multipledlinkhead Private HeadFile
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* Author: Huawei LiteOS Team
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* Create: 2013-01-01
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* --------------------------------------------------------------------------- */
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//这个头文件定义了一个多重双向链表头的私有接口和数据结构。
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#ifndef _LOS_MULTIPLE_DLINK_HEAD_PRI_H
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#define _LOS_MULTIPLE_DLINK_HEAD_PRI_H
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#include "los_base.h"
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#include "los_list.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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//表示最大的多重双向链表的大小的对数值。
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#define OS_MAX_MULTI_DLNK_LOG2 29
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//表示最小的多重双向链表的大小的对数值。
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#define OS_MIN_MULTI_DLNK_LOG2 4
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//表示多重双向链表的数量，通过最大和最小的对数值计算得到。
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#define OS_MULTI_DLNK_NUM ((OS_MAX_MULTI_DLNK_LOG2 - OS_MIN_MULTI_DLNK_LOG2) + 1)
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//表示多重双向链表头的大小。
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#define OS_DLNK_HEAD_SIZE OS_MULTI_DLNK_HEAD_SIZE
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//表示多重双向链表头结构体的大小。
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#define OS_MULTI_DLNK_HEAD_SIZE sizeof(LosMultipleDlinkHead)
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//用于存储多重双向链表的头指针数组。
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typedef struct {
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LOS_DL_LIST listHead[OS_MULTI_DLNK_NUM];
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} LosMultipleDlinkHead;
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//根据给定的头地址和链表节点头指针，返回下一个多重链表的头指针。
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STATIC INLINE LOS_DL_LIST *OsDLnkNextMultiHead(VOID *headAddr, LOS_DL_LIST *listNodeHead)
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{
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LosMultipleDlinkHead *head = (LosMultipleDlinkHead *)headAddr;
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return (&head->listHead[OS_MULTI_DLNK_NUM - 1] == listNodeHead) ? NULL : (listNodeHead + 1);
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}
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//对给定的头地址进行初始化，将多重双向链表的头指针数组中的所有指针置为 NULL。
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extern VOID OsDLnkInitMultiHead(VOID *headAddr);
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//根据给定的头地址和大小，返回对应的多重双向链表的头指针。
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extern LOS_DL_LIST *OsDLnkMultiHead(VOID *headAddr, UINT32 size);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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#endif /* _LOS_MULTIPLE_DLINK_HEAD_PRI_H */
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