进程共享数据封装成类

乡下佬

.cpp
#include "ShareMemory.h"


CShareMemory::CShareMemory(const        char* pszMapName, int nFileSize, BOOL bServer):m_hFileMap(NULL),m_pBuffer(NULL)
{
        if (bServer) //是服务端，就创建
        {
                m_hFileMap = ::CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_EXECUTE_READWRITE, 0, nFileSize, pszMapName);
        }
        else //否则就打开
        {
                m_hFileMap = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, pszMapName);
        }
        //把它映射到内存
        m_pBuffer = ::MapViewOfFile(m_hFileMap, FILE_MAP_ALL_ACCESS, 0, 0, 0);
}


CShareMemory::~CShareMemory(void)
{
        ::UnmapViewOfFile(m_pBuffer);
        ::CloseHandle(m_hFileMap);
}



.h
#pragma once
#include <Windows.h>

class CShareMemory
{
public:
        CShareMemory(const        char* pszMapName, int nFileSize=0, BOOL bServer=FALSE);
        ~CShareMemory(void);
        //属性
        LPVOID GetBuffer() const
        {
                return m_pBuffer;
        }

        //实现
private:
        HANDLE m_hFileMap;
        LPVOID m_pBuffer;
};



使用时：
服务端：
#include "ShareMemory.h"
int main(int argc, char *argv[])
{

        //进程间内存共享
        LPCTSTR lpName= "hello";
        LPCTSTR lpContent = "123456";
        CShareMemory* pShareMemory = new CShareMemory(lpName, 20, FALSE);
        LPVOID lpBase = pShareMemory->GetBuffer();
        strcpy((char*)lpBase, lpContent);
       
        printf("%s\n",(char*)pShareMemory->GetBuffer());
        getchar();
        return 0;
}
客户端：
#include "ShareMemory.h"
int main(int argc, char *argv[])
{

        //进程间内存共享
        LPCTSTR lpName= "hello";
        LPCTSTR lpContent = "123456";
        CShareMemory* pShareMemory = new CShareMemory(lpName, 20, FALSE);

        printf("%s\n",(char*)pShareMemory->GetBuffer());
        getchar();
        return 0;
}