winodws平臺C++共享內存實現

目錄(?)[-]

1.     服務端實現ShareMemServerh
2.     服務端實現ShareMemServercpp
3.     客戶端實現ShareMemClienth
4.     客戶端實現ShareMemClientcpp

    工作中用到本地程序與瀏覽器插件之間共享數據的需求，因此想到了使用內存共享的方法。

    使用平臺：windows

    使用說明：內存共享分爲服務端和客戶端，服務端寫入數據，客戶端讀取數據，服務端和客戶端通過使用相同的名字，來確認配對。

    服務端實現：ShareMemServer.h

#pragma once

/**************************************************************************************************

功能：共享內存服務端
作用：

用法：
CShareMemServer     m_shareMem;
void* pShareMem = m_shareMem.GetAddr();

共享內存名例子
#define SHARE_MEM_NAME  ( L"12345578-0B4B-4e9f-AAA4-19D29CC9416A" )
#define SHARE_MEM_NAME  ( L"12345578-0B4B-4e9f-AAA4-19D29CC9416A-1" )
#define SHARE_MEM_NAME  ( L"12345578-0B4B-4e9f-AAA4-19D29CC9416A-2" )
#define SHARE_MEM_NAME  ( L"12345578-0B4B-4e9f-AAA4-19D29CC9416A-3" )

**************************************************************************************************/

#include <Windows.h>
#include <string>
using namespace std;


class CShareMemServer
{
public:
    CShareMemServer(int iShareMemSize, wchar_t* pShareMemName);
    ~CShareMemServer(void);

    void* GetAddr();                                                //獲取共享內存地址

private:
    int         m_iShareMemSize;
    wstring     m_strShareMemName;

    HANDLE      m_hMapFile;
    LPVOID      m_lpMapAddress;                                     //共享內存地址
};

    服務端實現：ShareMemServer.cpp

#include ".\ShareMemServer.h"

CShareMemServer::CShareMemServer(int iShareMemSize, wchar_t* pShareMemName)
: m_iShareMemSize(iShareMemSize)
, m_strShareMemName(pShareMemName)
, m_lpMapAddress(NULL)
, m_hMapFile(NULL)
{
}

CShareMemServer::~CShareMemServer(void)
{
    if ( m_lpMapAddress )
    {
        UnmapViewOfFile( m_lpMapAddress );
        m_lpMapAddress = NULL;
    }

    if ( m_hMapFile )
    {
        CloseHandle( m_hMapFile );
        m_hMapFile = NULL;
    }
}

void* CShareMemServer::GetAddr()
{
    if ( NULL == m_lpMapAddress )
    {
        if ( NULL == m_hMapFile )
        {
            m_hMapFile = CreateFileMappingW( INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, m_iShareMemSize, m_strShareMemName.c_str() );
        }

        if (m_hMapFile)
        {
            m_lpMapAddress = MapViewOfFile( m_hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 0 );
        }
    }


    return m_lpMapAddress;
}

    客戶端實現：ShareMemClient.h

#pragma once

/**************************************************************************************************

功能：共享內存客戶端
作用：
1、獲取共享內存地址

用法：
CShareMemClient m_VideoData(VIDEO_SOURCE_SHARE_MEM_NAME)
void* pShareMem = m_VideoData.GetAddr();

**************************************************************************************************/

#include <Windows.h>
#include <string>
using namespace std;

class CShareMemClient
{
public:
    CShareMemClient(wchar_t* pShareMemName);
    ~CShareMemClient(void);

    void* GetAddr();                                        //獲取共享內存地址

private:
    int         m_iShareMemSize;
    wstring     m_strShareMemName;

    HANDLE      m_hMapFile;
    LPVOID      m_lpMapAddress;                             //共享內存地址
};

    客戶端實現：ShareMemClient.cpp

#include ".\ShareMemClient.h"

CShareMemClient::CShareMemClient(wchar_t* pShareMemName)
: m_strShareMemName(pShareMemName)
, m_lpMapAddress(NULL)
, m_hMapFile(NULL)
{
}

CShareMemClient::~CShareMemClient(void)
{
    if ( m_lpMapAddress )
    {
        UnmapViewOfFile( m_lpMapAddress );
        m_lpMapAddress = NULL;
    }

    if ( m_hMapFile )
    {
        CloseHandle( m_hMapFile );
        m_hMapFile = NULL;
    }
}

void* CShareMemClient::GetAddr()
{
    if ( NULL == m_lpMapAddress )
    {
        if ( NULL == m_hMapFile )
        {
            m_hMapFile = OpenFileMappingW( FILE_MAP_ALL_ACCESS, false, m_strShareMemName.c_str() );
        }

        if (m_hMapFile)
        {
            m_lpMapAddress = MapViewOfFile( m_hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 0 );
        }
    }


    return m_lpMapAddress;
}

資源下載：http://download.csdn.net/detail/shishuo365/4858832

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