C++封装的用于存放内存块的双向循环列表

C++有许多已经封装好的数据结构，但是当数据不是标准数据时，存在很大麻烦，如内存块时。

直接进入话题吧：

如题：

结构头文件

#include <stdio.h>#include <stdlib.h>#define  uint unsigned inttypedef struct databuf{char *Addr ;unsigned int Len ;databuf *next;databuf *previous;}databuf,*pdatabuf ;class NetData{public:pdatabuf Data ;bool Lock ;NetData();~NetData();void Lockdata();void UnLockdata();void WaitUnLock() ;    void Entity_entity(pdatabuf Node,char *Addr,uint Len);    /* first is messy print */    void Entity_print(pdatabuf Node);    void PrintList(pdatabuf phead);    /* Length 1 no data only head */    int GetLength(pdatabuf phead);    pdatabuf Before_Null_Node(pdatabuf phead);    /* Create,return Node add */    pdatabuf CreateNode(pdatabuf previous,char *Addr,uint Len);    pdatabuf CreateNode_Head();    /* Add Node between */    void AddNode(pdatabuf pNode,pdatabuf pNode2,char *Addr ,uint Len);    /* Delete next Node */    bool DeleteNode(pdatabuf pNode);private:protected:};

结构CPP文件

NetData::NetData():Lock(0){this->Data = CreateNode_Head() ;}NetData::~NetData(){}void NetData::Lockdata(){    printf("Locked\n");    this->Lock = 1 ;}void NetData::UnLockdata(){    printf("UnLocked\n");    this->Lock = 0 ;}void NetData::WaitUnLock(){    while(this->Lock==1)    {        usleep(200000);    }    printf("UnLocked\n");}void NetData::Entity_entity(pdatabuf Node,char *Addr,uint Len){    Node->Len = Len ;    Node->Addr = (char*)malloc(sizeof(char)*Node->Len);    memset(Node->Addr,0,Node->Len);    memcpy(Node->Addr,Addr,Node->Len);}pdatabuf NetData::CreateNode_Head(){    pdatabuf pNode = (pdatabuf)malloc(sizeof(databuf));    assert(pNode!=NULL);    pNode->next = NULL ;    pNode->previous = pNode;    return pNode ;}/* first is messy print */void NetData::Entity_print(pdatabuf Node){}void NetData::PrintList(pdatabuf phead){    pdatabuf p = phead ;    while(p!=NULL)    {        Entity_print(p);        p = p->next ;    }}/* Length 1 no data only head */int NetData::GetLength(pdatabuf phead){    pdatabuf p = phead ; int Length=0 ;    while(p!=NULL)    {        Length ++ ;        p = p->next ;    }    return Length ;}pdatabuf NetData::Before_Null_Node(pdatabuf phead){    pdatabuf p = phead ;    while(p->next!=NULL)    {        p=p->next ;    }    return p ;}/* Create,return Node add */pdatabuf NetData::CreateNode(pdatabuf previous,char *Addr ,uint Len){    pdatabuf pNode = (pdatabuf)malloc(sizeof(databuf));    assert(pNode!=NULL);    pNode->next = NULL ;    pNode->previous = previous ;    Entity_entity(pNode,Addr,Len);    return pNode ;}/* Add Node between */void NetData::AddNode(pdatabuf pNode,pdatabuf pNode2,char *Addr,uint Len){    pdatabuf pNew = CreateNode(pNode,Addr,Len);    pNode->next = pNew ;    pNew->next = pNode2 ;    //pNew->previous = pNode ;}/* Delete next Node */bool NetData::DeleteNode(pdatabuf pNode){    pdatabuf pDel = pNode->next ;    if(pDel==NULL)    {        printf(" No Node to Delete ");        return 0 ;    }    pNode->next = pDel->next ;    if(pDel->next!=NULL)    {    pDel->next->previous = pNode ;    }    pDel->previous = NULL ;    pDel->next = NULL ;    //free(pDel->Addr);    free(pDel);    return 1 ;}

使用此封装好的结构，改变类的名字，或者重新申请即可。