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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-14 WangXiaoyao the first version
*/
#ifndef __MM_INTERN_H__
#define __MM_INTERN_H__
#include "mm_aspace.h"
#include <rtdef.h>
#include <stddef.h>
/**
* @brief DATA STRUCTURE & API USED INTERNALLY
*
* This is mainly a wrapper layer to actual data structure.
* In this way, we can switch to any BST we like by adding new
* wrapper code.
* Every BST must satisfy the API to support MM
*
* *INFO: varea range convention
* For API, a range is specified by a base and its length.
* This provides a clear interface without ambiguity.
* For implementation, a range is specified by [start, end] tuple
* where both start and end are inclusive.
*/
struct _mm_range
{
void *start;
void *end;
};
/**
* @brief
*
* @param aspace
* @return rt_err_t
*/
rt_err_t _aspace_bst_init(struct rt_aspace *aspace);
/**
* @brief
*
* @param aspace
* @param start
* @return struct rt_varea*
*/
struct rt_varea *_aspace_bst_search(struct rt_aspace *aspace, void *start);
/**
* @brief Retrieve lowest varea satisfies
* ((varea->start >= start) || (varea->end >= start))
*
* @param aspace
* @param length
* @param struct _mm_range
* @return struct rt_varea*
*/
struct rt_varea *_aspace_bst_search_exceed(struct rt_aspace *aspace,
void *start);
/**
* @brief Retrieve any varea overlaps a specified address range
*
* @param aspace
* @param start
* @param length
* @return struct rt_varea*
*/
struct rt_varea *_aspace_bst_search_overlap(struct rt_aspace *aspace,
struct _mm_range range);
/**
* @brief Insert a varea into the bst
*
* @param aspace
* @param varea
*/
void _aspace_bst_insert(struct rt_aspace *aspace, struct rt_varea *varea);
/**
* @brief Remove a varea from the bst
*
* @param aspace
* @param varea
*/
void _aspace_bst_remove(struct rt_aspace *aspace, struct rt_varea *varea);
#endif /* __MM_INTERN_H__ */
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