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59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
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#ifndef __MEMORY_H__
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#define __MEMORY_H__
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/*
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本文件代码修改自作者： piaolingtear
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来源：http://blog.csdn.net/u011833609/article/details/46834203
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*/
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#include "stdint.h"
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#include "stdio.h"
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#include "string.h"
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#if LINUX
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#define uint32_t int
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#define uint16_t int
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#define uint8_t unsigned char
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#endif
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#define DMEM_BLOCK_SIZE 32 //内存块大小为32字节
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#define DMEM_BLOCK_NUM 320 //内存块个数为2048个
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#define DMEM_TOTAL_SIZE (DMEM_BLOCK_SIZE * DMEM_BLOCK_NUM) //内存总大小
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typedef enum
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{
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DMEM_FREE = 0,
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DMEM_USED = 1,
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} DMEM_USED_ITEM;
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typedef struct
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{
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DMEM_USED_ITEM used; //使用状态
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uint16_t blk_s; //起始块序号
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int blk_num; //块个数
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} DMEM_APPLY;
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//用户使用
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typedef struct
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{
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char *addr; //申请到的内存的起始地址
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uint32_t size; //申请到的内存的大小，按照块大小分配，大于等于申请大小
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uint16_t tb; //申请表序号，申请内存时分配，释放内存时使用，用户不使用
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} DMEM;
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typedef struct
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{
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DMEM_USED_ITEM tb_blk[DMEM_BLOCK_NUM];
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DMEM tb_user[DMEM_BLOCK_NUM]; //用户申请内存信息
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DMEM_APPLY tb_apply[DMEM_BLOCK_NUM]; //系统分配内存信息
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uint16_t apply_num; //内存申请表占用数目
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int blk_num; //内存块占用数目
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int reqTimes; //memory request times
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int maxNum;
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} DMEM_STATE;
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//若返回空，则申请失败
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DMEM *DynMemGet(uint32_t size);
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void DynMemPut(DMEM *pDmem);
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#endif //__MEMORY_H__
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