进程通信系列-单向邮槽

来源：互联网发布：常熟淘宝拍卖编辑：程序博客网时间：2024/05/21 10:35

单向邮槽可以用于局域网的不可靠单向广播，代码长度一般，功能一般

缺点：不可靠，单向

优点：简单，不必关心协议

单向邮槽类：

#include "stdafx.h"#include "mailslot.h"mailslot::mailslot(void){hmail=NULL;}mailslot::~mailslot(void){if(hmail)CloseHandle(hmail);}int mailslot::free(){if(hmail){CloseHandle(hmail);return 1;}return 0;}int mailslot::have(){if(!hmail)return 0;DWORD cbMessage, cMessage;    GetMailslotInfo(hmail,(LPDWORD) NULL, &cbMessage,&cMessage,0);  if(cbMessage == MAILSLOT_NO_MESSAGE) return 0;return 1;}int mailslot::create(CString name){MessageBox(0,"等待发送端","ok",MB_ICONINFORMATION);//创建邮槽hmail=CreateMailslot("\\\\.\\mailslot\\"+name,0,500,NULL);if(hmail==INVALID_HANDLE_VALUE||hmail==0){MessageBox(0,"创建失败","错误",MB_ICONERROR);hmail=0;return 0;}return 1;}CString mailslot::read(){char content[200];DWORD dread;if(!ReadFile(hmail,content,200,&dread,NULL)){MessageBox(0,"读取失败","错误",MB_ICONERROR);return "";}return content;}int mailslot::connect(CString server,CString name)//server不知道填什么可以，试了好多都不行，只能是.或*,也许是安全问题{hmail=CreateFile("\\\\"+server+"\\mailslot\\"+name,GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);if(hmail==INVALID_HANDLE_VALUE||hmail==0){MessageBox(0,"打开失败！,请确定目标地址已准备接受","错误",MB_ICONERROR);hmail=0;return 0;}return 1;}int mailslot::send(CString content){DWORD dwrite;if(!WriteFile(hmail,content,content.GetLength()+1,&dwrite,NULL)){MessageBox(0,"写入失败","错误",MB_ICONERROR);return 0;}return 1;}