C++进程共享数据封装成类 C++进程共享数据封装成类实例

#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); 
}

#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; 
};

#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; 
}

#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; 
}