C/C++进程通讯(命名管道)的实例

// pipe_server.cpp : 定义控制台应用程序的入口点。
//
 
#include "stdafx.h"
#include 
#include 
#include 
 
int main(int argc, _TCHAR* argv[])
{
   srand(time(NULL));
 
  char buf[256] = "";
   DWORD rlen = 0;
   HANDLE hPipe = CreateNamedPipe(
     TEXT("\\\\.\\Pipe\\mypipe"),            //管道名
     PIPE_ACCESS_DUPLEX,                  //管道类型
     PIPE_TYPE_MESSAGE|PIPE_READMODE_MESSAGE|PIPE_WAIT,  //管道参数
     PIPE_UNLIMITED_INSTANCES,              //管道能创建的最大实例数量
     0,                          //输出缓冲区长度 0表示默认
     0,                          //输入缓冲区长度 0表示默认
     NMPWAIT_WAIT_FOREVER,                //超时时间
     NULL);                        //指定一个SECURITY_ATTRIBUTES结构,或者传递零值
 
  if (INVALID_HANDLE_VALUE == hPipe)
   {
     printf("Create Pipe Error(%d)\n",GetLastError());
   }
   else
   {
     printf("Waiting For Client Connection...\n");
 
    if(!ConnectNamedPipe(hPipe, NULL))  //阻塞等待客户端连接。
     {
       printf("Connection failed!\n");
     }
     else
     {
       printf("Connection Success!\n");
     }
 
    while (true)
     {
       if(!ReadFile(hPipe,buf,256,&rlen,NULL)) //接受客户端发送过来的内容
       {      
         printf("Read Data From Pipe Failed!\n");
         break;
       }
       else
       {
         printf("From Client: data = %s, size = %d\n", buf, rlen);
         
         char wbuf[256] = "";
         sprintf(wbuf, "%s%d", wbuf, rand()%1000);
         DWORD wlen = 0;
         WriteFile(hPipe, wbuf, sizeof(wbuf), &wlen, 0);  //向客户端发送内容
         printf("To Client: data = %s, size = %d\n", wbuf, wlen);
         Sleep(1000);
       }
     }
     FlushFileBuffers(hPipe);
     DisconnectNamedPipe(hPipe);
     CloseHandle(hPipe);//关闭管道
   }
 
  system("pause");
   return 0;
}

// pipe_client.cpp : 定义控制台应用程序的入口点。
//
 
#include "stdafx.h"
#include 
#include 
#include 
 
int main(int argc, _TCHAR* argv[])
{
   srand(time(NULL));
 
  DWORD wlen = 0;
   Sleep(1000);//等待pipe的创建成功！
 
  BOOL bRet = WaitNamedPipe(TEXT("\\\\.\\Pipe\\mypipe"), NMPWAIT_WAIT_FOREVER);
 
  if (!bRet)
   {
     printf("connect the namedPipe failed!\n");
     return 0;
   }
 
  HANDLE hPipe = CreateFile(      //管道属于一种特殊的文件
     TEXT("\\\\.\\Pipe\\mypipe"),  //创建的文件名
     GENERIC_READ | GENERIC_WRITE,  //文件模式
     0,                //是否共享
     NULL,              //指向一个SECURITY_ATTRIBUTES结构的指针
     OPEN_EXISTING,          //创建参数
     FILE_ATTRIBUTE_NORMAL,      //文件属性(隐藏,只读)NORMAL为默认属性
     NULL);              //模板创建文件的句柄
 
  if (INVALID_HANDLE_VALUE == hPipe)
   {
     printf("open the exit pipe failed!\n");
   }
   else
   {
     while(true)
     {
       char buf[256] = "";
       sprintf(buf,"%s%d",buf,rand()%1000);
       if(WriteFile(hPipe,buf,sizeof(buf),&wlen,0)==FALSE)  //向服务器发送内容
       {
         printf("write to pipe failed!\n");
         break;
       }
       else
       {
         printf("To Server: data = %s, size = %d\n", buf, wlen);
         char rbuf[256] = "";
         DWORD rlen = 0;
         ReadFile(hPipe, rbuf, sizeof(rbuf), &rlen, 0);  //接受服务发送过来的内容
         printf("From Server: data = %s, size = %d\n", rbuf, rlen);
       }
       Sleep(1000);
     }
     CloseHandle(hPipe);//关闭管道
   }
 
  system("pause");
   return 0;
}