dwsocket.h
#pragma once
#include <string>
#include <sys/epoll.h>
namespace dw {
using namespace std;
class Addr
{
public:
int port;
string ip;
Addr(string ip, int port);
Addr();
~Addr();
friend ostream& operator<<(ostream &out, const Addr &addr);
private:
};
/*
* 服務(wù)端Socket 完全異步
*/
class ServerSocket
{
public:
Addr *addr = NULL;
int maxListenNum = 128;//最大監(jiān)聽(tīng)數(shù),libevent也是128
int epollSize = 65535;//epoll 的最大監(jiān)聽(tīng)數(shù)
int maxEvents = 1024;
int maxThread = 1; //最大線程數(shù)(socket開(kāi)啟時(shí),會(huì)會(huì)根據(jù)cpu核心數(shù),重新初始化該值)
ServerSocket(int port);
~ServerSocket();
int start();
private:
int socketfd = -1;
int epollfd = -1;
epoll_event* events;
void initAddr(int port);
int initSocket();
int initEpoll();
void setNonBlock(int fd); //設(shè)置非阻塞socket
void initMaxThread();
void loopWait();
void addSocketFd(int fd);
int initThreadPool(); //初始化線程池
};
}
Addr.cpp
#include "dwsocket.h"
#include<iostream>
namespace dw {
Addr::Addr() {
}
Addr::Addr(string ip, int port) {
this->port = port;
this->ip = ip;
}
Addr::~Addr() {
}
ostream& operator<<(ostream &out, const Addr &addr) {
out << addr.ip << ":" << addr.port;
return out;
}
}
ServerSocket.cpp
#include "dwsocket.h"
#include<iostream>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <sys/sysinfo.h>
namespace dw {
using namespace std;
ServerSocket::ServerSocket(int port) {
initAddr(port);
initMaxThread();
}
ServerSocket::~ServerSocket() {
delete addr;
shutdown(socketfd, SHUT_RDWR);
}
void ServerSocket::initMaxThread() {
int cpuCoreNum = get_nprocs();
maxThread = cpuCoreNum * 2;
}
void ServerSocket::initAddr(int port) {
addr = new Addr("127.0.0.1", port);
}
int ServerSocket::initSocket() {
if (maxListenNum <= 0) {
cout << "Error: maxListenNum 必須大于0 " << endl;
return -1;
}
socketfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (socketfd < 0) {
cout << "Error: socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)" << endl;
return -1;
}
//設(shè)置socket
setNonBlock(socketfd);
int opt = 1;
setsockopt(socketfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(addr->port);
int err = bind(socketfd, (struct sockaddr*) &server_addr, sizeof(server_addr));
if (err < 0) {
cout << "Error: bind(socketfd, (struct sockaddr*) &server_addr, sizeof(server_addr))" << endl;
return -1;
}
err = listen(socketfd, maxListenNum);
if (err < 0) {
cout << "Error: listen(socketfd, maxListenNum)" << endl;
return -1;
}
return 0;
}
void ServerSocket::setNonBlock(int fd) {
int fl = fcntl(socketfd, F_GETFL);
fcntl(socketfd, F_SETFL, fl | O_NONBLOCK);
}
int ServerSocket::initEpoll() {
epollfd = epoll_create(epollSize);
if (epollfd < 0) {
cout << "Error: epoll_create(maxEvents)" << endl;
return -1;
}
events = new epoll_event[maxEvents];
addSocketFd(socketfd);
return 0;
}
void ServerSocket::loopWait() {
struct sockaddr_in clientaddr;
socklen_t clilen = sizeof(clientaddr);
while (1) {
int num = epoll_wait(epollfd, events, maxEvents, -1); //返回活躍用戶個(gè)數(shù)
for (int i = 0; i < num; i++) {
int connfd = -1;
if (events[i].data.fd == socketfd) {
//新連接
cout << "新連接" << endl;
connfd = accept(socketfd, (struct sockaddr *) &clientaddr, &clilen);
if (connfd < 0) {
cout << "連接失敗" << endl;
continue;
}
setNonBlock(connfd);
}
else if (events[i].events&EPOLLIN) {
//以前的連接,有數(shù)據(jù)讀取
cout << "以前的連接 讀取" << endl;
if ((connfd = events[i].data.fd) < 0) {
cout << "連接失敗" << endl;
continue;
}
}
else if (events[i].events&EPOLLOUT) {
//以前的連接,有數(shù)據(jù)寫出
cout << "以前的連接 寫出" << endl;
}
else {
cout << "其他" << endl;
continue;
}
addSocketFd(connfd);
}
}
}
void ServerSocket::addSocketFd(int fd) {
struct epoll_event event;
event.data.fd = fd;
event.events = EPOLLIN | EPOLLET;
epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &event);
}
int ServerSocket::start() {
int err = initSocket();
if (err < 0) {
cout << "Error: initSocket()" << endl;
return -1;
}
err = initEpoll();
if (err < 0) {
cout << "Error: initEpoll()" << endl;
return -1;
}
loopWait();
return 0;
}
}