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进程通信系列-单向邮槽
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;
}
最后更新：2017-04-03 20:43:08