VC中进程与进程之间共享内存_vc进程间共享内存-优快云博客

本文介绍了使用Visual C++实现进程间通信的方法，通过创建共享内存区让两个进程（进程A和进程B）进行数据交换。进程A负责写入数据到共享内存中，而进程B则读取这些数据。

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VC中进程与进程之间共享内存

进程A写数据，进程B读数据；

进程A：

#include "stdafx.h"
#include <Windows.h>
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
HANDLE lhShareMemory;
char* lpBuffer = NULL;

lhShareMemory = CreateFileMapping(HANDLE(0xFFFFFFFF), NULL, PAGE_READWRITE,
0, 10, "mySharedMemory");

if (NULL == lhShareMemory)
{
  if (ERROR_ALREADY_EXISTS == GetLastError())
  {
   cout << "Already exists!";
  }
  else
  {
   cout << "Create Sheared Memory unsuccessfully!";
  }
  return 0;
}

lpBuffer = (char*)MapViewOfFile(lhShareMemory, FILE_MAP_WRITE, 0, 0, 10);
if (NULL == lpBuffer)
{
cout << "Get Share memory unsuccessfully!";
return 0;
}

strcpy(lpBuffer, "hello");
cout << *(lpBuffer + 40) << endl;
Sleep(600000);
UnmapViewOfFile(lpBuffer);
return 0;
}

进程B：

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

int _tmain(int argc, _TCHAR* argv[])
{
HANDLE lhShareMemory;
char* lpcBuffer;

lhShareMemory = OpenFileMapping(FILE_MAP_READ, false, "mySharedMemory");
if (NULL == lhShareMemory)
{
  cout << "Open share memory unsuccessfully!" << endl;
  DWORD ldwError = GetLastError();
  cout << ldwError;
  return 0;
}

lpcBuffer = (char*)MapViewOfFile(lhShareMemory, FILE_MAP_READ, 0, 0, 100);
if (NULL == lpcBuffer)
{
  cout << "Open share memory unsuccessfully!";
  return 0;
}

for (int i = 0; i < 100; ++i)
{
  cout << *(lpcBuffer + i);
}
UnmapViewOfFile(lpcBuffer);
return 0;
}

转自：http://www.cnblogs.com/cwbcwb505/archive/2008/12/08/1350505.html