邮槽的应用
邮槽 在网络上进程通信为单向方式
::OnMailslotRecv() //接收端即为服务器端
{
HANDLE hMailslot;
CString mailhostName("");
mailhostName= "\\\\.\\mailslot\\MyRecvMailslot";
hMailslot = CreateMailslot(mailhostName,0,
MAILSLOT_WAIT_FOREVER,NULL);
if(INVALID_HANDLE_VALUE == hMailslot)
{
AfxMessageBox("连接失败!");
return "0";
}
char buf[100];
DWORD dwRead;
if(!ReadFile(hMailslot,buf,100,&dwRead,NULL))
{
AfxMessageBox("操作失败!");
CloseHandle(hMailslot);
return "0";
}
CloseHandle(hMailslot);
return buf;
}
在客户端要知道服务器端的主机名进行通信
::OnMailslotSend(CString strMailslot,CString hostName) //strMailslot为要发送的数据 //hostName为服务器端的主机名
{
HANDLE hMailslot;
CString mailhostName("");
mailhostName.Format("\\\\%s\\mailslot\\MyRecvMailslot",hostName);
hMailslot = CreateFile(mailhostName,GENERIC_WRITE,
FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
if(INVALID_HANDLE_VALUE == hMailslot)
{
AfxMessageBox("连接失败!");
return;
}
char * buf = NULL;
buf = new char[strMailslot.GetLength()+1];
strcpy(buf,strMailslot);
DWORD dwWrite;
if(!WriteFile(hMailslot,buf,strlen(buf)+1,&dwWrite,NULL))
{
AfxMessageBox("操作失败!");
CloseHandle(hMailslot);
return;
}
CloseHandle(hMailslot);
}