epoll c++封装
#ifndef _BFC_EPOLL_FLOW_HPP_
#define _BFC_EPOLL_FLOW_HPP_
#include <string.h>
#include <errno.h>
#include <sys/epoll.h>
#include <assert.h>
#include <string>
#include <stdexcept>
#include <iostream>
/*
EPOLLIN :表示对应的文件描述符可以读
EPOLLOUT:表示对应的文件描述符可以写
EPOLLPRI:表示对应的文件描述符有紧急的数据可读
EPOLLERR:表示对应的文件描述符发生错误
EPOLLHUP:表示对应的文件描述符被挂断
EPOLLET: 表示对应的文件描述符有事件发生
*/
class CEPollFlow
{
public:
CEPollFlow();
~CEPollFlow();
int Create(int iMaxFD);
//int Wait(int iTimeMs);
int Wait(int iTimeMs);
int GetEvents(long long &llKey, unsigned int &iEvent);
int Add(int iFd,long long llKey,int iFlag);
int Modify(int iFd,long long llKey,int iFlag);
int Del(int iFd);
private:
int Ctl(int iFd,long long llKey,int iEpollAction, int iFlag);
int m_iEpollFD;
epoll_event* m_pEpollEvents;
int m_iMaxFD;
int m_iEventNum;
int m_iCurrEvtIdx;
};
#endif // _BFC_EPOLL_FLOW_HPP_
#include "bfc_epoll_flow.h"
CEPollFlow::CEPollFlow()
{
m_iEpollFD = -1;
m_pEpollEvents = NULL;
}
CEPollFlow::~CEPollFlow()
{
if(m_pEpollEvents)
{
delete [] m_pEpollEvents;
}
if(m_iEpollFD >= 0)
{
close(m_iEpollFD);
}
}
int CEPollFlow::Create(int iMaxFD)
{
m_iMaxFD = iMaxFD;
m_iEpollFD = epoll_create(iMaxFD);
if(m_iEpollFD < 0)
{
return -1;
}
m_pEpollEvents = new epoll_event[iMaxFD];
return 0;
}
int CEPollFlow::Wait(int iTimeMs)
{
m_iEventNum = epoll_wait(m_iEpollFD, m_pEpollEvents, m_iMaxFD, iTimeMs);
m_iCurrEvtIdx = 0;
return m_iEventNum;
}
int CEPollFlow::Add(int iFd, long long llKey, int iFlag)
{
return Ctl(iFd,llKey,EPOLL_CTL_ADD,iFlag);
}
int CEPollFlow::Del(int iFd)
{
return Ctl(iFd, 0, EPOLL_CTL_DEL, 0);
}
int CEPollFlow::Modify(int iFd, long long llKey, int iFlag)
{
return Ctl(iFd, llKey, EPOLL_CTL_MOD, iFlag);
}
int CEPollFlow::GetEvents(long long &llKey, unsigned int &iEvent)
{
if(m_iCurrEvtIdx >= m_iEventNum)
{
return 0;
}
epoll_event* curr_event = &m_pEpollEvents[m_iCurrEvtIdx++];
llKey = curr_event->data.u64;
iEvent = curr_event->events;
return 1;
}
int CEPollFlow::Ctl(int iFd,long long llKey,int iEpollAction, int iFlag)
{
epoll_event evt;
evt.events = iFlag;
evt.data.u64 = llKey;
int ret = epoll_ctl(m_iEpollFD, iEpollAction, iFd, &evt);
if(ret < 0)
{
return -1;
}
return 0;
}
posted on 2017-12-21 10:31 angry-baby 阅读(357) 评论(0) 编辑 收藏 举报