MFC学习 进程间通信

内存共享通信方式

server.cpp

#include <stdio.h>
#include <Windows.h>
int main()
{
    HANDLE hFile;
    hFile = CreateFile("tmpfile", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
        NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY, NULL);
    if(hFile == INVALID_HANDLE_VALUE)
    {
        printf("create file failed");
        system("pause");
        return 0;
    }
    
    DWORD dwWrite;
    WriteFile(hFile, "test data", strlen("test data") + 1, &dwWrite, NULL);
    
    HANDLE hFileMapping;
    hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "mytestfilemapping");
    if(hFileMapping == NULL)
    {

        CloseHandle(hFile);
        
        printf("Create file mapping failed!");
        system("pause");
        return 0;
    }
    /* 可以在这里面修改pfile
    char * pFile = (char*)MapViewOfFile(hFileMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
    if(pFile == NULL)
    {
        CloseHandle(hFileMapping);
        CloseHandle(hFile);
        printf("map view of file failed!");
        system("pause");
        return 0;
    }
    */
    Sleep(5000);
    CloseHandle(hFile);
    CloseHandle(hFileMapping);
    
    system("pause");
    return 0;
}

client.cpp

#include <stdio.h>
#include <Windows.h>
int main()
{
    HANDLE hFile;
    hFile = CreateFile("tmpfile", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
        NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY, NULL);
    if(hFile == INVALID_HANDLE_VALUE)
    {
        printf("create file failed");
        system("pause");
        return 0;
    }
    
    DWORD dwWrite;
    WriteFile(hFile, "test data", strlen("test data") + 1, &dwWrite, NULL);
    
    HANDLE hFileMapping;
    hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "mytestfilemapping");
    if(hFileMapping == NULL)
    {

        CloseHandle(hFile);
        
        printf("Create file mapping failed!");
        system("pause");
        return 0;
    }
    /* 可以在这里面修改pfile
    char * pFile = (char*)MapViewOfFile(hFileMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
    if(pFile == NULL)
    {
        CloseHandle(hFileMapping);
        CloseHandle(hFile);
        printf("map view of file failed!");
        system("pause");
        return 0;
    }
    */
    Sleep(5000);
    CloseHandle(hFile);
    CloseHandle(hFileMapping);
    
    system("pause");
    return 0;
}

例子包括剪切板,  匿名管道(父子进程通信), 命名管道, 油槽(单向, 但可以一边同时建立服务与客户端),  内存共享

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