\u4e00\u4e2a Epoll \u5bf9\u8c61\u6210\u5458 _epoll，\u5b83\u662f\u540c\u6b65\u4e8b\u4ef6\u5206\u79bb\u5668\u7684\u5c01\u88c5\u3002 \u7531\u4e8e _epoll \u662f\u503c\u6210\u5458，Epoll \u5bf9\u8c61\u4f1a\u968f TcpServer \u7684\u6784\u9020\u81ea\u52a8\u521b\u5efa\u3002<\/li>\n<\/ul>\n\u5728 TcpServer \u7684\u6784\u9020\u51fd\u6570\u4e2d\u8c03\u7528 Epoll \u7c7b\u63d0\u4f9b\u7684 EpollCreate \u51fd\u6570，\u521b\u5efa\u5185\u6838\u4e2d\u7684 epoll \u5b9e\u4f8b，\u5e76\u628a epoll_create \u8fd4\u56de\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8bb0\u5f55\u5230 Epoll \u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf _epollFd \u4e2d，\u4fbf\u4e8e\u540e\u7eed epoll_ctl \u4e0e epoll_wait \u4f7f\u7528\u3002<\/p>\n
TcpServer \u5bf9\u8c61\u6790\u6784\u65f6，_epoll \u4f5c\u4e3a\u6210\u5458\u4f1a\u81ea\u52a8\u6790\u6784，\u5176\u6790\u6784\u51fd\u6570\u4e2d\u8c03\u7528 close \u5173\u95ed epoll \u6a21\u578b\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u65e0\u9700\u624b\u52a8\u5904\u7406\u3002<\/p>\n
\u6b64\u5916，\u6790\u6784\u65f6\u8fd8\u9700\u8981\u91ca\u653e _connections \u4e2d\u6240\u6709\u7684 Connection \u5bf9\u8c61\u2014\u2014\u8be5\u6620\u5c04\u8868\u5b58\u653e\u7684\u662f\u88f8\u6307\u9488，\u4e0d\u4f1a\u81ea\u52a8\u91ca\u653e，\u5e94\u9010\u4e2a delete，\u5426\u5219\u6bcf\u5904\u7406\u4e00\u4e2a\u8fde\u63a5\u5c31\u6cc4\u6f0f\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
\nA.\u00a0\u5c01\u88c5 Epoll \u7c7b<\/p>\n
Epoll.hpp<\/p>\n
#pragma once<\/p>\n
#include <iostream>
\n#include <sys\/epoll.h><\/p>\n
class Epoll
\n{
\n const static int gnum = 128;
\n const static int gtimeout = 5000;
\npublic:
\n Epoll(int timeout = gtimeout) : _timeout(timeout)
\n {}<\/p>\n
void CreateEpoll()
\n {
\n _epfd = epoll_create(gnum);
\n if(_epfd < 0) exit(5);
\n }<\/p>\n
bool DelFromEpoll(int sock)
\n {
\n int n = epoll_ctl(_epfd, EPOLL_CTL_DEL, sock, nullptr);
\n return n == 0;
\n }<\/p>\n
bool CtrlEpoll(int sock, uint32_t events)
\n {
\n events |= EPOLLET;
\n struct epoll_event ev;
\n ev.events = events;
\n ev.data.fd = sock;
\n int n = epoll_ctl(_epfd, EPOLL_CTL_MOD, sock, &ev);
\n return n == 0;
\n }<\/p>\n
bool AddSockToEpoll(int sock, uint32_t events)
\n {
\n struct epoll_event ev;
\n ev.events = events;
\n ev.data.fd = sock;
\n int n = epoll_ctl(_epfd, EPOLL_CTL_ADD, sock, &ev);
\n return n == 0;
\n }<\/p>\n
int WaitEpoll(struct epoll_event revs[], int num)
\n {
\n return epoll_wait(_epfd, revs, num, _timeout);
\n }<\/p>\n
~Epoll()
\n {}<\/p>\n
private:
\n int _epfd;
\n int _timeout;
\n};<\/p>\n
\nB.\u00a0TcpServer \u7c7b\u90e8\u5206\u4ee3\u7801<\/p>\n
\/\/ \u8fd9\u4e2a\u7f51\u7edc\u670d\u52a1\u5668\u575a\u51b3\u4e0d\u8981\u548c\u4e0a\u5c42\u4e1a\u52a1\u5f3a\u8026\u5408
\nclass TcpServer
\n{
\n const static int gport = 8080;
\n const static int gnum = 128;<\/p>\n
public:
\n TcpServer(int port = gport) : _port(port), _revs_num(gnum)
\n {
\n \/\/ 1. \u521b\u5efalistensock
\n _listensock = Sock::Socket();
\n Sock::Bind(_listensock, _port);
\n Sock::Listen(_listensock);<\/p>\n
\/\/ 2. \u521b\u5efa\u591a\u8def\u8f6c\u63a5\u5bf9\u8c61
\n _poll.CreateEpoll();<\/p>\n
\/\/ 3. \u6dfb\u52a0listensock\u5230\u670d\u52a1\u5668\u4e2d
\n AddConnection(_listensock,
\n std::bind(&TcpServer::Accepter, this, std::placeholders::_1),
\n nullptr, nullptr);<\/p>\n
\/\/ 4. \u6784\u5efa\u4e00\u4e2a\u83b7\u53d6\u5c31\u7eea\u4e8b\u4ef6\u7684\u7f13\u51b2\u533a
\n _revs = new struct epoll_event[_revs_num];
\n }<\/p>\n
~TcpServer()
\n {
\n if (_listensock >= 0) close(_listensock);
\n if (_revs) delete[] _revs;
\n }<\/p>\n
private:
\n int _listensock;
\n int _port;
\n Epoll _poll;
\n std::unordered_map<int, Connection *> _connections;
\n struct epoll_event *_revs;
\n int _revs_num;<\/p>\n
\/\/ \u8fd9\u4e2a\u662f\u4e0a\u5c42\u7684\u4e1a\u52a1\u5904\u7406
\n callback_t _cb;
\n};<\/p>\n
\na. AddConnection \u51fd\u6570<\/p>\n
TcpServer \u7c7b\u4e2d\u7684 AddConnection \u51fd\u6570\u7528\u4e8e\u8fdb\u884c\u4e8b\u4ef6\u6ce8\u518c\u3002<\/p>\n
\u5728\u6ce8\u518c\u4e8b\u4ef6\u65f6\u9700\u8981\u4f20\u5165\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u548c\u4e09\u4e2a\u56de\u8c03\u51fd\u6570<\/span><\/span>，\u8868\u793a\u5f53\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u4e8b\u4ef6（\u9ed8\u8ba4\u53ea\u5173\u5fc3\u8bfb\u4e8b\u4ef6）\u5c31\u7eea\u540e\u5e94\u8be5\u6267\u884c\u7684\u56de\u8c03\u65b9\u6cd5\u3002<\/p>\n\u5728 AddConnection \u51fd\u6570\u5185\u90e8\u8981\u505a\u7684\u5c31\u662f：\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e（ET \u6a21\u5f0f\u7684\u8981\u6c42），\u628a\u5957\u63a5\u5b57\u548c\u56de\u8c03\u51fd\u6570\u7b49\u5c5e\u6027\u5c01\u88c5\u4e3a\u4e00\u4e2a Connection \u5bf9\u8c61，\u518d\u5c06\u8be5\u5957\u63a5\u5b57\u6dfb\u52a0\u5230 epoll \u6a21\u578b\u4e2d，\u5e76\u5efa\u7acb\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0e Connection \u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb，\u7531 TcpServer \u7edf\u4e00\u7ba1\u7406\u3002<\/p>\n
\/\/ \u8fd9\u91cc\u4e13\u95e8\u9488\u5bf9\u4efb\u610fsock\u8fdb\u884c\u6dfb\u52a0TcpServer
\nvoid AddConnection(int sock, func_t recv_cb, func_t send_cb, func_t except_cb)
\n{
\n Sock::SetNonBlock(sock);
\n \/\/ \u9664\u4e86 _listensock，\u4ee5\u540e\u4f1a\u5b58\u5728\u5927\u91cf\u7684socket，\u6bcf\u4e00\u4e2asock\u90fd\u5fc5\u987b\u88ab\u5c01\u88c5\u6210\u4e3a\u4e00\u4e2aConnection
\n \/\/ \u5f53\u670d\u52a1\u5668\u4e2d\u5b58\u5728\u5927\u91cf\u7684Connection\u65f6，TcpServer\u9700\u8981\u5c06\u6240\u6709\u7684Connection\u8981\u8fdb\u884c\u7ba1\u7406：\u5148\u63cf\u8ff0，\u518d\u7ec4\u7ec7
\n \/\/ 1. \u6784\u5efaconn\u5bf9\u8c61，\u5c01\u88c5sock
\n Connection *conn = new Connection(sock);
\n conn->SetCallBack(recv_cb, send_cb, except_cb);
\n conn->_tsvr = this;
\n \/\/conn->_lasttimestamp = time();
\n \/\/ 2. \u6dfb\u52a0sock\u5230epoll\u4e2d
\n _poll.AddSockToEpoll(sock, EPOLLIN | EPOLLET); \/\/ \u4efb\u4f55\u591a\u8def\u8f6c\u63a5\u7684\u670d\u52a1\u5668，\u4e00\u822c\u9ed8\u8ba4\u53ea\u4f1a\u6253\u5f00\u5bf9\u8bfb\u53d6\u4e8b\u4ef6\u7684\u5173\u5fc3，\u5199\u5165\u4e8b\u4ef6\u4f1a\u6309\u9700\u8fdb\u884c\u6253\u5f00
\n \/\/ 3. \u8fd8\u8981\u5c06\u5bf9\u5e94\u7684Connection*\u5bf9\u8c61\u6307\u9488\u6dfb\u52a0\u5230Connections\u6620\u5c04\u8868\u4e2d
\n _connections.insert(std::make_pair(sock, conn));
\n}<\/p>\n
\nb. Dispatcher \u51fd\u6570（\u521d\u59cb\u5206\u53d1\u5668）<\/p>\n
TcpServer \u4e2d\u7684 Dispatcher \u51fd\u6570\u5373\u521d\u59cb\u5206\u53d1\u5668\u3002\u5176\u5185\u90e8\u662f\u4e00\u4e2a while \u5faa\u73af，\u6bcf\u8f6e\u8c03\u7528\u4e00\u6b21 epoll_wait \u7b49\u5f85\u4e8b\u4ef6\u53d1\u751f\u3002<\/p>\n
epoll_wait \u8fd4\u56de\u5c31\u7eea\u4e8b\u4ef6\u7684\u4e2a\u6570 n，\u5c31\u7eea\u4e8b\u4ef6\u5b58\u653e\u5728 _revs \u6570\u7ec4\u4e2d\u3002<\/p>\n
\u968f\u540e\u904d\u5386\u8fd9 n \u4e2a\u4e8b\u4ef6，\u5bf9\u6bcf\u4e00\u4e2a\u4e8b\u4ef6\u4f9d\u6b21\u505a\u4e09\u4ef6\u4e8b：<\/p>\n
\u53d6\u51fa\u8be5\u4e8b\u4ef6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 fd \u4e0e\u4e8b\u4ef6\u7c7b\u578b revents；<\/li>\n\u901a\u8fc7 unordered_map \u627e\u5230\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u5bf9\u5e94\u7684 Connection \u7ed3\u6784；<\/li>\n\u6839\u636e revents \u5224\u65ad\u8be5\u8c03\u7528\u54ea\u4e2a\u56de\u8c03，\u5e76\u8c03\u7528\u5b83：<\/li>\n\n- \u542b EPOLLERR \/ EPOLLHUP –>\u00a0\u8c03\u7528\u5f02\u5e38\u56de\u8c03（\u5e94\u4f18\u5148\u5224\u65ad）<\/li>\n
- \u542b EPOLLIN –>\u00a0\u8c03\u7528\u8bfb\u56de\u8c03<\/li>\n
- \u542b EPOLLOUT –>\u00a0\u8c03\u7528\u5199\u56de\u8c03 \u672c\u8f6e\u6240\u6709\u4e8b\u4ef6\u5904\u7406\u5b8c\u6bd5\u540e，\u56de\u5230\u5faa\u73af\u5f00\u5934\u7ee7\u7eed epoll_wait\u3002<\/li>\n<\/ul>\n
LoopOnce() \u2014\u2014 \u5355\u8f6e\u4e8b\u4ef6\u5904\u7406<\/p>\n
void LoopOnce()
\n{
\n int n = _poll.WaitEpoll(_revs, _revs_num);
\n for (int i = 0; i < n; i++)
\n {
\n int sock = _revs[i].data.fd;
\n uint32_t revents = _revs[i].events;<\/p>\n
\/\/ \u5c06\u6240\u6709\u7684\u5f02\u5e38\u5168\u90e8\u4ea4\u7ed9read\u6216\u8005write\u6765\u7edf\u4e00\u5904\u7406
\n if(revents & EPOLLERR) revents |= (EPOLLIN | EPOLLOUT);
\n if(revents & EPOLLHUP) revents |= (EPOLLIN | EPOLLOUT);<\/p>\n
if (revents & EPOLLIN)
\n {
\n if (IsConnectionExists(sock) && _connections[sock]->_recv_cb != nullptr)
\n _connections[sock]->_recv_cb(_connections[sock]);
\n }
\n if (revents & EPOLLOUT)
\n {
\n if (IsConnectionExists(sock) && _connections[sock]->_send_cb != nullptr)
\n _connections[sock]->_send_cb(_connections[sock]);
\n }
\n }
\n}<\/p>\n
Dispatcher() \u2014\u2014 \u4e8b\u4ef6\u5faa\u73af<\/p>\n
\/\/ \u6839\u636e\u5c31\u7eea\u7684\u4e8b\u4ef6，\u8fdb\u884c\u7279\u5b9a\u4e8b\u4ef6\u7684\u6d3e\u53d1
\nvoid Dispatcher(callback_t cb)
\n{
\n _cb = cb;
\n while (true)
\n {
\n ConnectAliveCheck();
\n LoopOnce(); \/\/ \u5c06epoll\u5f53\u505a\u5b9a\u65f6\u5668\u6765\u4f7f\u7528
\n }
\n}<\/p>\n
private \u6210\u5458（\u4e0e\u524d\u4e00\u81f4）<\/p>\n
private:
\n int _listensock;
\n int _port;
\n Epoll _poll;
\n std::unordered_map<int, Connection *> _connections;
\n struct epoll_event *_revs;
\n int _revs_num;<\/p>\n
\/\/ \u8fd9\u4e2a\u662f\u4e0a\u5c42\u7684\u4e1a\u52a1\u5904\u7406
\n callback_t _cb;
\n};<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u6ca1\u6709\u901a\u8fc7 switch \/if \u5206\u652f\u5224\u65ad epoll_wait \u7684\u8fd4\u56de\u7ed3\u679c，\u800c\u662f\u5229\u7528 for \u5faa\u73af\u6761\u4ef6\u672c\u8eab\u5b8c\u6210\u8fd4\u56de\u503c\u5224\u5b9a：<\/p>\n
\n- epoll_wait \u8fd4\u56de -1：\u4ee3\u8868\u8c03\u7528\u51fa\u9519，\u5faa\u73af\u6761\u4ef6\u4e0d\u6210\u7acb，\u4e0d\u4f1a\u8fdb\u5165\u5faa\u73af\u4f53\u6267\u884c\u4e8b\u4ef6\u903b\u8f91；<\/li>\n
- epoll_wait \u8fd4\u56de 0：\u4ee3\u8868\u7b49\u5f85\u8d85\u65f6，\u5faa\u73af\u6761\u4ef6\u540c\u6837\u4e0d\u6210\u7acb，\u8df3\u8fc7\u4e8b\u4ef6\u5904\u7406；<\/li>\n
- epoll_wait \u8fd4\u56de\u5927\u4e8e 0：\u4ee3\u8868\u6210\u529f\u6355\u83b7\u5230\u5c31\u7eea\u4e8b\u4ef6，\u8fdb\u5165 for \u5faa\u73af，\u6267\u884c\u5bf9\u5e94\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u3002<\/li>\n<\/ul>\n
\u5728\u4e8b\u4ef6\u5904\u7406\u6d41\u7a0b\u91cc，\u4f1a\u4f18\u5148\u5904\u7406\u5f02\u5e38\u4e8b\u4ef6，\u5e76\u4ea4\u7531\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570\u5b8c\u6210\u5904\u7406\u3002<\/p>\n
\nc. EnableReadWrite \u51fd\u6570<\/p>\n
TcpServer \u7c7b\u4e2d\u7684 EnableReadWrite \u51fd\u6570，\u7528\u4e8e\u52a8\u6001\u4fee\u6539\u67d0\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u76d1\u542c\u4e8b\u4ef6<\/span><\/span>\u3002 \u8c03\u7528\u8be5\u51fd\u6570\u65f6\u9700\u8981\u4f20\u5165\u4e09\u4e2a\u53c2\u6570：<\/p>\n\n- \u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u8868\u793a\u9700\u8981\u8bbe\u7f6e\u7684\u662f\u54ea\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u5bf9\u5e94\u7684\u4e8b\u4ef6；<\/li>\n
- \u4e24\u4e2a bool \u503c，\u5206\u522b\u8868\u793a\u662f\u5426\u5173\u5fc3\u8bfb\u4e8b\u4ef6\u4ee5\u53ca\u662f\u5426\u5173\u5fc3\u5199\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n
\u51fd\u6570\u5185\u90e8\u4f1a\u8c03\u7528 Epoll \u7c7b\u5c01\u88c5\u597d\u7684 CtrlEpoll \u51fd\u6570（\u5373 epoll_ctl(EPOLL_CTL_MOD)）\u4fee\u6539\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u76d1\u542c\u4e8b\u4ef6\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u51fd\u6570？<\/span><\/span><\/p>\n\u56e0\u4e3a\u5199\u4e8b\u4ef6\u4e0d\u80fd\u957f\u671f\u6ce8\u518c：\u53ea\u8981\u5e95\u5c42\u53d1\u9001\u7f13\u51b2\u533a\u4e0d\u6ee1，\u5199\u4e8b\u4ef6\u5c31\u4f1a\u4e00\u76f4\u5904\u4e8e\u5c31\u7eea\u72b6\u6001，\u5bfc\u81f4 epoll_wait \u6bcf\u6b21\u90fd\u7acb\u5373\u8fd4\u56de\u3001CPU \u7a7a\u8f6c\u3002\u56e0\u6b64\u6b63\u786e\u505a\u6cd5\u662f"\u6309\u9700\u5f00\u5173"：<\/p>\n
\n- \u6570\u636e\u53d1\u4e0d\u5b8c\u65f6 –>\u00a0EnableReadWrite(fd, true, true) \u6253\u5f00\u5199\u4e8b\u4ef6；<\/li>\n
- \u6570\u636e\u5168\u90e8\u53d1\u5b8c\u540e –>\u00a0EnableReadWrite(fd, true, false) \u7acb\u5373\u5173\u95ed\u5199\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n
\u8bfb\u4e8b\u4ef6\u901a\u5e38\u662f\u957f\u671f\u5173\u5fc3\u7684（\u8fde\u63a5\u6d3b\u7740\u5c31\u8981\u8bfb），\u6240\u4ee5\u8fd9\u4e2a\u51fd\u6570\u4e3b\u8981\u7528\u6765\u5f00\u5173\u5199\u4e8b\u4ef6\u3002<\/p>\n
void EnableReadWrite(Connection *conn, bool readable, bool writeable)
\n{
\n uint32_t events = ((readable ? EPOLLIN : 0) | (writeable ? EPOLLOUT : 0));
\n bool res = _poll.CtrlEpoll(conn->_sock, events);
\n assert(res);
\n}<\/p>\n
\n（4）\u56de\u8c03\u51fd\u6570<\/h4>\n\n- Accepter：\u8fde\u63a5\u4e8b\u4ef6\u89e6\u53d1\u65f6，\u6267\u884c\u8fd9\u4e2a\u56de\u8c03\u51fd\u6570，\u83b7\u53d6\u5e95\u5c42\u5df2\u7ecf\u5efa\u7acb\u5b8c\u6210\u7684\u8fde\u63a5\u3002<\/li>\n
- Recver：\u8bfb\u4e8b\u4ef6\u5c31\u7eea\u65f6，\u6267\u884c\u8be5\u56de\u8c03\u51fd\u6570，\u8bfb\u53d6\u5ba2\u6237\u7aef\u4f20\u8f93\u7684\u6570\u636e\u5e76\u505a\u4e1a\u52a1\u5904\u7406\u3002<\/li>\n
- Sender：\u5199\u4e8b\u4ef6\u5c31\u7eea\u65f6，\u6267\u884c\u8be5\u56de\u8c03\u51fd\u6570，\u5411\u5ba2\u6237\u7aef\u56de\u4f20\u54cd\u5e94\u6570\u636e\u3002<\/li>\n
- Excepter：\u5f02\u5e38\u4e8b\u4ef6\u53d1\u751f\u65f6，\u8c03\u7528\u8be5\u56de\u8c03\u51fd\u6570，\u5b8c\u6210\u5404\u7c7b\u8d44\u6e90\u7684\u91ca\u653e\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n
\u5728\u4e3a\u6587\u4ef6\u63cf\u8ff0\u7b26\u521b\u5efa Connection \u5b9e\u4f8b\u65f6，\u53ef\u4ee5\u8c03\u7528 Connection \u7c7b\u7684 SetCallBack \u65b9\u6cd5，\u628a\u4e0a\u9762\u8fd9\u51e0\u7ec4\u56de\u8c03\u51fd\u6570\u6ce8\u518c\u5230 Connection \u5bf9\u8c61\u4e2d\u3002<\/p>\n
- \u76d1\u542c\u5957\u63a5\u5b57\u6240\u7ed1\u5b9a\u7684 Connection \u5b9e\u4f8b，\u5b83\u7684_recvCb \u56de\u8c03\u4f1a\u8bbe\u7f6e\u6210 Accepter\u3002\u539f\u56e0\u662f\u76d1\u542c\u5957\u63a5\u5b57\u7684\u8bfb\u4e8b\u4ef6\u5c31\u7eea，\u672c\u8d28\u5c31\u4ee3\u8868\u6709\u65b0\u8fde\u63a5\u5230\u6765；\u76d1\u542c\u5957\u63a5\u5b57\u53ea\u9700\u8981\u5173\u6ce8\u8bfb\u4e8b\u4ef6，\u6240\u4ee5\u5b83\u7684_sendCb \u4e0e_exceptCb \u53ef\u4ee5\u76f4\u63a5\u7f6e\u7a7a（nullptr）\u3002<\/li>\n
- \u5f53 Dispatcher \u68c0\u6d4b\u5230\u76d1\u542c\u5957\u63a5\u5b57\u7684\u8bfb\u4e8b\u4ef6\u5c31\u7eea\u540e，\u5c31\u4f1a\u6267\u884c\u8be5 Connection \u5185\u7684_recvCb \u56de\u8c03，\u4e5f\u5c31\u662f Accepter，\u4ee5\u6b64\u83b7\u53d6\u65b0\u5efa\u7acb\u7684\u5e95\u5c42\u8fde\u63a5\u3002<\/li>\n
- \u800c\u548c\u5ba2\u6237\u7aef\u901a\u4fe1\u7684\u666e\u901a\u5957\u63a5\u5b57，\u5b83\u5bf9\u5e94\u7684 Connection \u5b9e\u4f8b\u4f1a\u628a_recvCb\u3001_sendCb\u3001_exceptCb \u5206\u522b\u7ed1\u5b9a\u4e3a Recver\u3001Sender\u3001Excepter\u3002<\/li>\n
- \u4e00\u65e6 Dispatcher \u6355\u83b7\u5230\u8fd9\u7c7b\u5957\u63a5\u5b57\u7684\u5c31\u7eea\u4e8b\u4ef6，\u5c31\u4f1a\u6267\u884c Connection \u5bf9\u8c61\u4e0a\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570，\u4e5f\u5c31\u662f Recver\u3001Sender\u3001Excepter\u3002<\/li>\n
\nA. Accepter<\/p>\n
Accepter \u56de\u8c03\u4e13\u95e8\u8d1f\u8d23\u5904\u7406\u65b0\u8fde\u63a5\u4e8b\u4ef6，\u6267\u884c\u903b\u8f91\u5982\u4e0b：<\/p>\n
\n- \u8c03\u7528\u5c01\u88c5\u597d\u7684 Accept \u51fd\u6570，\u62ff\u5230\u5e95\u5c42\u5b8c\u6210\u5efa\u7acb\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/li>\n
- \u8c03\u7528 AddConnection \u51fd\u6570，\u628a\u65b0\u83b7\u53d6\u7684\u5957\u63a5\u5b57\u5305\u88c5\u6210 Connection \u5bf9\u8c61，\u4ea4\u7531\u670d\u52a1\u5668\u7edf\u4e00\u7ba1\u7406\u3002<\/li>\n
- \u5b8c\u6210\u8fd9\u4e00\u6b65\u540e，\u5957\u63a5\u5b57\u4ee5\u53ca\u5b83\u9700\u8981\u76d1\u542c\u7684\u4e8b\u4ef6，\u5c31\u6ce8\u518c\u5230 Dispatcher \u4e8b\u4ef6\u5206\u53d1\u5668\u91cc\u4e86\u3002<\/li>\n<\/ul>\n
\u540e\u7eed Dispatcher \u505a\u4e8b\u4ef6\u6d3e\u53d1\u65f6，\u4f1a\u6301\u7eed\u76d1\u542c\u8fd9\u4e2a\u5957\u63a5\u5b57\u7684\u4e8b\u4ef6；\u4e00\u65e6\u4e8b\u4ef6\u5c31\u7eea，\u5c31\u81ea\u52a8\u6267\u884c\u8be5\u5957\u63a5\u5b57\u6240\u5c5e Connection \u5bf9\u8c61\u7ed1\u5b9a\u7684\u56de\u8c03\u51fd\u6570\u3002<\/p>\n
void Accepter(Connection *conn)
\n{
\n \/\/ logMessage(DEBUG, "Accepter been called");
\n \/\/ \u4e00\u5b9a\u662flistensock\u5df2\u7ecf\u5c31\u7eea\u4e86，\u6b64\u6b21\u8bfb\u53d6\u4e0d\u4f1a\u963b\u585e
\n while (true)
\n {
\n std::string clientip;
\n uint16_t clientport;
\n int accept_errno = 0;
\n \/\/ sock\u4e00\u5b9a\u662f\u975e\u5e38\u89c4\u7684IO sock
\n int sock = Sock::Accept(conn->_sock, &clientip, &clientport, &accept_errno);
\n if (sock < 0)
\n {
\n if (accept_errno == EAGAIN || accept_errno == EWOULDBLOCK) break;
\n else if (accept_errno == EINTR) continue; \/\/ \u6982\u7387\u975e\u5e38\u4f4e
\n else
\n {
\n \/\/ accept\u5931\u8d25
\n logMessage(WARNING, "accept error, %d : %s", accept_errno, strerror(accept_errno));
\n break;
\n }
\n }
\n \/\/ \u5c06sock\u6258\u7ba1\u7ed9TcpServer
\n if (sock >= 0)
\n {
\n AddConnection(sock, std::bind(&TcpServer::Recver, this, std::placeholders::_1),
\n std::bind(&TcpServer::Sender, this, std::placeholders::_1),
\n std::bind(&TcpServer::Excepter, this, std::placeholders::_1));
\n logMessage(DEBUG, "accept client %s:%d success, add to epoll&TcpServer success, sock: %d",
\n clientip.c_str(), clientport, sock);
\n }
\n }
\n}<\/p>\n
\u8fd9\u91cc\u5b9e\u73b0\u7684\u662f ET \u6a21\u5f0f\u7684 epoll \u670d\u52a1\u5668，\u6240\u4ee5\u5728\u83b7\u53d6\u65b0\u8fde\u63a5\u65f6，\u9700\u8981\u5faa\u73af\u8c03\u7528 accept，\u540c\u65f6\u76d1\u542c\u5957\u63a5\u5b57\u5fc5\u987b\u914d\u7f6e\u4e3a\u975e\u963b\u585e\u3002<\/p>\n
\n- ET \u6a21\u5f0f\u7684\u7279\u70b9\u662f：\u4ec5\u5f53\u5c31\u7eea\u4e8b\u4ef6\u72b6\u6001\u53d1\u751f\u53d8\u5316（\u8fde\u63a5\u4ece\u65e0\u5230\u6709\u3001\u6570\u91cf\u7531\u5c11\u53d8\u591a）\u624d\u4f1a\u5411\u4e0a\u901a\u77e5\u3002\u5982\u679c\u6ca1\u6709\u4e00\u6b21\u6027\u628a\u5185\u6838\u4e2d\u5168\u90e8\u5df2\u5efa\u7acb\u7684\u8fde\u63a5\u8bfb\u53d6\u5e72\u51c0，\u5e76\u4e14\u540e\u7eed\u4e0d\u518d\u4ea7\u751f\u65b0\u8fde\u63a5，\u90a3\u4e48\u5185\u6838\u91cc\u6b8b\u7559\u7684\u8fde\u63a5\u5c31\u4f1a\u6c38\u4e45\u4e22\u5931\u3002a<\/li>\n
- \u5faa\u73af\u8c03\u7528 accept \u4f1a\u5e26\u6765\u4e00\u4e2a\u95ee\u9898：\u5f53\u5185\u6838\u6240\u6709\u8fde\u63a5\u90fd\u8bfb\u53d6\u5b8c\u6bd5\u540e，\u7ee7\u7eed\u8c03\u7528 accept \u5c31\u4f1a\u963b\u585e\u7b49\u5f85\u65b0\u8fde\u63a5\u3002\u56e0\u6b64\u76d1\u542c\u5957\u63a5\u5b57\u8981\u8bbe\u7f6e\u6210\u975e\u963b\u585e，\u5185\u6838\u65e0\u8fde\u63a5\u65f6 accept \u4f1a\u76f4\u63a5\u8fd4\u56de\u800c\u4e0d\u4f1a\u963b\u585e\u3002 \u540c\u65f6，accept \u8fd4\u56de\u7684\u65b0\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u4e5f\u9700\u8981\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e，\u9632\u6b62\u540e\u7eed\u5faa\u73af\u8c03\u7528 recv\u3001send \u65f6\u53d1\u751f\u963b\u585e\u3002<\/li>\n
- \u4e0a\u8ff0\u975e\u963b\u585e\u914d\u7f6e，\u7edf\u4e00\u7531 AddConnection \u5185\u90e8\u7684 SetNonBlock \u51fd\u6570\u5b8c\u6210\u3002<\/li>\n<\/ul>\n
\na.\u00a0\u8bbe\u7f6e\u975e\u963b\u585e<\/span><\/p>\n\u8bbe\u7f6e\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e3a\u975e\u963b\u585e\u65f6，\u9700\u5148\u8c03\u7528 fcntl \u51fd\u6570\u83b7\u53d6\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u5bf9\u5e94\u7684\u6587\u4ef6\u72b6\u6001\u6807\u8bb0，\u7136\u540e\u5728\u8be5\u6587\u4ef6\u72b6\u6001\u6807\u8bb0\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u975e\u963b\u585e\u6807\u8bb0 O_NONBLOCK，\u6700\u540e\u8c03\u7528 fcntl \u51fd\u6570\u5bf9\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u72b6\u6001\u6807\u8bb0\u8fdb\u884c\u8bbe\u7f6e\u5373\u53ef\u3002<\/p>\n
static bool SetNonBlock(int sock)
\n {
\n int fl = fcntl(sock, F_GETFL);
\n if(fl < 0) return false;
\n fcntl(sock, F_SETFL, fl | O_NONBLOCK);
\n return true;
\n }<\/p>\n
\u76d1\u542c\u5957\u63a5\u5b57\u5f00\u542f\u975e\u963b\u585e\u4e4b\u540e，\u5982\u679c\u5f53\u524d\u6ca1\u6709\u5c31\u7eea\u8fde\u63a5，accept \u4f1a\u4ee5\u9519\u8bef\u7684\u5f62\u5f0f\u8fd4\u56de\u3002\u6240\u4ee5\u5f53 accept \u8fd4\u56de\u503c\u5c0f\u4e8e 0 \u65f6，\u6211\u4eec\u9700\u8981\u8fdb\u4e00\u6b65\u5224\u65ad\u9519\u8bef\u7801：<\/p>\n
\n- \u5982\u679c\u9519\u8bef\u7801\u662fEAGAIN\u6216EWOULDBLOCK，\u4ee3\u8868\u5185\u6838\u5df2\u7ecf\u6ca1\u6709\u5f85\u63a5\u6536\u7684\u8fde\u63a5，\u6240\u6709\u8fde\u63a5\u90fd\u8bfb\u53d6\u5b8c\u6210，\u76f4\u63a5\u8fd4\u56de 0，\u4ee3\u8868\u672c\u6b21 Accepter \u56de\u8c03\u6267\u884c\u6210\u529f\u3002<\/li>\n
- \u5982\u679c\u9519\u8bef\u7801\u662fEINTR，\u8bf4\u660e accept \u8c03\u7528\u8fc7\u7a0b\u88ab\u7cfb\u7edf\u4fe1\u53f7\u6253\u65ad，\u9700\u8981\u7ee7\u7eed\u5faa\u73af\u8c03\u7528 accept \u5c1d\u8bd5\u83b7\u53d6\u8fde\u63a5\u3002<\/li>\n
- \u5176\u4f59\u9519\u8bef\u7801\u5219\u4ee3\u8868 accept \u53d1\u751f\u4e86\u771f\u6b63\u7684\u5f02\u5e38，\u8fd4\u56de – 1，\u8868\u793a\u672c\u6b21 Accepter \u56de\u8c03\u6267\u884c\u5931\u8d25\u3002<\/li>\n<\/ul>\n
\naccept\u3001recv\u3001send \u8fd9\u7c7b IO \u7cfb\u7edf\u8c03\u7528\u4e3a\u4ec0\u4e48\u4f1a\u88ab\u4fe1\u53f7\u4e2d\u65ad？<\/span><\/span><\/p>\n\u5f53 IO \u7cfb\u7edf\u8c03\u7528\u51fa\u9519\u8fd4\u56de，\u5e76\u4e14\u9519\u8bef\u7801\u88ab\u7f6e\u4e3aEINTR，\u5c31\u4ee3\u8868\u672c\u6b21 IO \u8bfb\u5199\u64cd\u4f5c\u5728\u5b8c\u6210\u524d\u88ab\u4fe1\u53f7\u6253\u65ad\u3002\u7b80\u5355\u6765\u8bf4：\u7cfb\u7edf\u8c03\u7528\u9677\u5165\u5185\u6838\u4e4b\u540e\u3001\u8fd8\u6ca1\u8fd4\u56de\u7528\u6237\u6001\u4e4b\u524d，\u5185\u6838\u6536\u5230\u4e86\u4fe1\u53f7\u3002<\/p>\n
\u5185\u6838\u51c6\u5907\u4ece\u5185\u6838\u6001\u5207\u56de\u7528\u6237\u6001\u524d，\u4f1a\u68c0\u67e5\u672a\u51b3\u4fe1\u53f7\u96c6（pending \u4f4d\u56fe）\u3002\u5982\u679c\u5b58\u5728\u8fd8\u672a\u5904\u7406\u7684\u4fe1\u53f7，\u5185\u6838\u5c31\u4f1a\u4f18\u5148\u53bb\u5904\u7406\u8fd9\u4e2a\u4fe1\u53f7\u3002<\/p>\n
EINTR\u5c5e\u4e8e\u4e00\u79cd\u7279\u6b8a\u573a\u666f\u3002IO \u64cd\u4f5c\u5206\u4e3a\u7b49\u5f85\u5c31\u7eea\u548c\u6570\u636e\u62f7\u8d1d\u4e24\u4e2a\u9636\u6bb5<\/span><\/span>，\u5176\u4e2d\u7b49\u5f85\u9636\u6bb5\u8017\u65f6\u901a\u5e38\u66f4\u957f，\u6b64\u65f6\u8fdb\u7a0b\u5904\u4e8e\u963b\u585e\u7b49\u5f85\u7684\u95f2\u7f6e\u72b6\u6001\u3002\u5982\u679c\u5728\u8fd9\u4e2a\u7b49\u5f85\u9636\u6bb5\u6536\u5230\u4fe1\u53f7，\u5185\u6838\u4f1a\u7acb\u523b\u6682\u505c\u672c\u6b21 IO \u8c03\u7528，\u8f6c\u800c\u53bb\u5904\u7406\u4fe1\u53f7，\u4e8e\u662f\u5c31\u4ea7\u751f\u4e86EINTR\u4e2d\u65ad\u9519\u8bef\u3002<\/p>\n
\nb. \u5199\u4e8b\u4ef6\u6309\u9700\u5f00\u542f<\/span><\/p>\nAccepter \u63a5\u6536\u65b0\u8fde\u63a5\u5957\u63a5\u5b57，\u5e76\u628a\u5b83\u6ce8\u518c\u5230 Dispatcher \u65f6，\u4ec5\u6ce8\u518cEPOLLIN\u4e0eEPOLLET，\u4e5f\u5c31\u662f\u53ea\u8ba9 epoll \u76d1\u542c\u8be5\u5957\u63a5\u5b57\u7684\u8bfb\u4e8b\u4ef6\u3002<\/p>\n
\u4e0d\u6ce8\u518c\u5199\u4e8b\u4ef6\u7684\u539f\u56e0\u5f88\u7b80\u5355：\u6b64\u65f6\u6682\u65e0\u5f85\u53d1\u9001\u6570\u636e，\u6ca1\u5fc5\u8981\u8ba9 epoll \u6301\u7eed\u76d1\u542c\u5199\u5c31\u7eea\u4e8b\u4ef6\u3002\u901a\u5e38\u8bfb\u4e8b\u4ef6\u9ed8\u8ba4\u5f00\u542f，\u5199\u4e8b\u4ef6\u91c7\u7528\u6309\u9700\u5f00\u542f\u7684\u7b56\u7565：\u53ea\u6709\u5b58\u5728\u5f85\u53d1\u9001\u6570\u636e\u65f6，\u624d\u5411 epoll \u6ce8\u518c\u5199\u4e8b\u4ef6；\u4e00\u65e6\u6240\u6709\u6570\u636e\u53d1\u9001\u5b8c\u6210，\u5c31\u7acb\u523b\u5173\u95ed\u8be5\u5957\u63a5\u5b57\u7684\u5199\u4e8b\u4ef6\u76d1\u542c\u3002<\/p>\n
\nB. Recver<\/p>\n
Recver \u56de\u8c03\u8d1f\u8d23\u5904\u7406\u8bfb\u4e8b\u4ef6，\u6267\u884c\u6d41\u7a0b\u5982\u4e0b<\/span><\/span>： \u5faa\u73af\u8c03\u7528 recv \u51fd\u6570\u8bfb\u53d6\u6570\u636e，\u5e76\u628a\u8bfb\u5230\u7684\u6570\u636e\u5b58\u5165\u5f53\u524d\u5957\u63a5\u5b57\u5bf9\u5e94\u7684 Connection \u5bf9\u8c61\u7684_inBuffer\u7f13\u51b2\u533a\u3002 \u5bf9_inBuffer\u5185\u7684\u6570\u636e\u505a\u62a5\u6587\u89e3\u6790\u62c6\u5206，\u53d6\u51fa\u5b8c\u6574\u62a5\u6587，\u672a\u8bfb\u5b8c\u7684\u6b8b\u7559\u6570\u636e\u7ee7\u7eed\u4fdd\u7559\u5728\u7f13\u51b2\u533a\u4e2d\u3002 \u8c03\u7528\u4e1a\u52a1\u5904\u7406\u51fd\u6570，\u5904\u7406\u89e3\u6790\u51fa\u6765\u7684\u5b8c\u6574\u62a5\u6587\u3002<\/p>\n\u5f53 recv \u8fd4\u56de\u503c\u5c0f\u4e8e 0 \u65f6，\u9700\u8981\u5224\u65ad\u9519\u8bef\u7801：<\/p>\n
\n- \u9519\u8bef\u7801\u4e3aEAGAIN\u6216EWOULDBLOCK：\u5185\u6838\u7f13\u51b2\u533a\u6570\u636e\u5df2\u7ecf\u5168\u90e8\u8bfb\u53d6\u5b8c\u6210；<\/li>\n
- \u9519\u8bef\u7801\u4e3aEINTR：\u672c\u6b21\u8bfb\u53d6\u88ab\u4fe1\u53f7\u4e2d\u65ad，\u9700\u8981\u7ee7\u7eed\u5faa\u73af\u8c03\u7528 recv \u8bfb\u53d6\u6570\u636e；<\/li>\n
- \u5176\u4f59\u60c5\u51b5：\u4ee3\u8868\u8bfb\u64cd\u4f5c\u53d1\u751f\u9519\u8bef\u3002<\/li>\n<\/ul>\n
\u4e00\u65e6\u8bfb\u64cd\u4f5c\u51fa\u9519，\u76f4\u63a5\u89e6\u53d1\u8be5\u5957\u63a5\u5b57\u7ed1\u5b9a\u7684_exceptCb\u5f02\u5e38\u56de\u8c03，\u5728\u5f02\u5e38\u56de\u8c03\u5185\u90e8\u5173\u95ed\u5957\u63a5\u5b57\u3002<\/p>\n
\na. \u62a5\u6587\u5207\u5272<\/p>\n
\u62a5\u6587\u5207\u5272\u7684\u6838\u5fc3\u76ee\u7684\u662f\u89e3\u51b3 TCP \u7c98\u5305\u95ee\u9898，\u800c\u7c98\u5305\u7684\u5904\u7406\u65b9\u5f0f\u548c\u81ea\u5b9a\u4e49\u534f\u8bae\u5f3a\u76f8\u5173<\/span><\/span>\u3002 \u6211\u4eec\u9700\u8981\u6309\u7167\u534f\u8bae\u89c4\u5219\u62c6\u5206\u62a5\u6587，\u4f8b\u5982 UDP \u5e38\u91c7\u7528\u5b9a\u957f\u62a5\u5934\u52a0\u81ea\u63cf\u8ff0\u5b57\u6bb5\u7684\u65b9\u6848\u5b9e\u73b0\u62a5\u6587\u5206\u79bb\u3002 \u672c\u6587\u91cd\u70b9\u5728\u4e8e\u6f14\u793a\u5b8c\u6574\u7684\u6570\u636e\u5904\u7406\u6d41\u7a0b，\u4e3a\u964d\u4f4e\u590d\u6742\u5ea6，\u4e0d\u8bbe\u8ba1\u590d\u6742\u534f\u8bae，\u76f4\u63a5\u4f7f\u7528\u5b57\u7b26X\u4f5c\u4e3a\u62a5\u6587\u5206\u9694\u6807\u8bb0，\u6bcf\u4e00\u6761\u62a5\u6587\u7684\u672b\u5c3e\u90fd\u4ee5X\u6807\u8bc6\u62a5\u6587\u7ed3\u675f\u3002<\/p>\n\u62a5\u6587\u5207\u5272\u903b\u8f91\u5c31\u662f\u4ee5X\u4f5c\u4e3a\u5206\u9694\u7b26，\u5bf9_inBuffer\u5185\u7684\u6570\u636e\u8fdb\u884c\u62c6\u5206<\/span><\/span>\u3002 SplitMessage\u51fd\u6570\u8d1f\u8d23\u5b8c\u6210\u8fd9\u4e2a\u5de5\u4f5c：\u628a_inBuffer\u4e2d\u5207\u5206\u51fa\u7684\u5b8c\u6574\u62a5\u6587\u5b58\u5165 vector \u5bb9\u5668；\u90a3\u4e9b\u4e0d\u8db3\u4ee5\u7ec4\u6210\u5b8c\u6574\u62a5\u6587\u7684\u5269\u4f59\u6570\u636e，\u5219\u7ee7\u7eed\u4fdd\u7559\u5728_inBuffer\u7f13\u51b2\u533a\u91cc\u3002<\/p>\n\/\/ \u8981\u628a\u4f20\u5165\u8fdb\u6765\u7684\u7f13\u51b2\u533a\u8fdb\u884c\u5207\u5206
\n\/\/ 1. buffer\u88ab\u5207\u8d70\u7684，\u540c\u65f6\u4e5f\u8981\u5c06\u5176\u4ecebuffer\u4e2d\u79fb\u9664
\n\/\/ 2. \u53ef\u80fd\u4f1a\u5b58\u5728\u591a\u4e2a\u62a5\u6587，\u591a\u4e2a\u62a5\u6587\u4f9d\u6b21\u653e\u5165out
\n\/\/ buffer: \u8f93\u5165\u8f93\u51fa\u578b\u53c2\u6570 out: \u8f93\u51fa\u578b\u53c2\u6570
\nvoid SpliteMessage(std::string &buffer, std::vector<std::string> *out)
\n{
\n while (true)
\n {
\n auto pos = buffer.find(SEP);
\n if (std::string::npos == pos) break;
\n std::string message = buffer.substr(0, pos);
\n buffer.erase(0, pos + SEP_LEN);
\n out->push_back(message);
\n }
\n}<\/p>\n
\nb. \u4e1a\u52a1\u5904\u7406\u51fd\u6570<\/p>\n
\u5bf9\u5206\u5272\u5f97\u5230\u7684\u5b8c\u6574\u62a5\u6587\u6267\u884c\u53cd\u5e8f\u5217\u5316\u64cd\u4f5c\u3002 \u6267\u884c\u4e1a\u52a1\u903b\u8f91\u3002 \u4e1a\u52a1\u5904\u7406\u5b8c\u6210\u540e，\u7ec4\u88c5\u751f\u6210\u54cd\u5e94\u62a5\u6587\u3002 \u628a\u7ec4\u88c5\u597d\u7684\u54cd\u5e94\u62a5\u6587\u5199\u5165\u5f53\u524d Connection \u5bf9\u8c61\u7684_outBuffer\u8f93\u51fa\u7f13\u51b2\u533a，\u540c\u65f6\u5f00\u542f\u5957\u63a5\u5b57\u7684\u5199\u4e8b\u4ef6\u76d1\u542c\u3002<\/p>\n
\u540e\u7eed Dispatcher \u8fdb\u884c\u4e8b\u4ef6\u5206\u53d1\u65f6，\u5c31\u4f1a\u76d1\u542c\u8be5\u5957\u63a5\u5b57\u7684\u5199\u4e8b\u4ef6；\u4e00\u65e6\u5199\u4e8b\u4ef6\u5c31\u7eea，\u5c31\u4f1a\u89e6\u53d1 Connection \u7ed1\u5b9a\u7684\u5199\u56de\u8c03\u51fd\u6570，\u628a_outBuffer\u7f13\u51b2\u533a\u91cc\u7684\u54cd\u5e94\u6570\u636e\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n
void NetCal(Connection *conn, std::string &request)
\n{
\n logMessage(DEBUG, "NetCal been called, get request: %s", request.c_str());<\/p>\n
\/\/ 1. \u53cd\u5e8f\u5217\u5316
\n Request req;
\n if(!req.Deserialized(request)) return;<\/p>\n
\/\/ 2. \u4e1a\u52a1\u5904\u7406
\n Response resp = calculator(req);<\/p>\n
\/\/ 3. \u5148\u5e8f\u5217\u5316，\u518d\u6784\u5efa\u5e94\u7b54
\n std::string sendstr = resp.Serialize();
\n sendstr = Encode(sendstr);<\/p>\n
\/\/ 4. \u4ea4\u7ed9\u670d\u52a1\u5668conn
\n conn->_outbuffer += sendstr;<\/p>\n
\/\/ 5. \u60f3\u529e\u6cd5\u8ba9\u5e95\u5c42\u7684TcpServer，\u8ba9\u5b83\u5f00\u59cb\u53d1\u9001
\n \/\/ \/\/ a. \u9700\u8981\u6709\u5b8c\u6574\u7684\u53d1\u9001\u903b\u8f91
\n \/\/ \/\/ b. \u89e6\u53d1\u53d1\u9001\u7684\u52a8\u4f5c，\u4e00\u65e6\u5f00\u542fEPOLLOUT，epoll\u4f1a\u81ea\u52a8\u7acb\u9a6c\u89e6\u53d1\u4e00\u6b21\u53d1\u9001\u4e8b\u4ef6\u5c31\u7eea，
\n \/\/ \/\/ \u5982\u679c\u540e\u7eed\u4fdd\u6301\u53d1\u9001\u7684\u5f00\u542f，epoll\u4f1a\u4e00\u76f4\u53d1\u9001
\n conn->_tsvr->EnableReadWrite(conn, true, true);
\n}<\/p>\n
\nc.\u00a0\u534f\u8bae\u5b9a\u5236<\/p>\n
\u534f\u8bae\u90e8\u5206：Encode \/ Request \/ Response<\/p>\n
std::string Encode(std::string &s)
\n{
\n return s + SEP;
\n}<\/p>\n
class Request
\n{
\npublic:
\n std::string Serialize()
\n {
\n std::string str;
\n str = std::to_string(x_);
\n str += SPACE;
\n str += op_;
\n str += SPACE;
\n str += std::to_string(y_);
\n return str;
\n }
\n bool Deserialized(const std::string &str)
\n {
\n std::size_t left = str.find(SPACE);
\n if (left == std::string::npos) return false;
\n std::size_t right = str.rfind(SPACE);
\n if (right == std::string::npos) return false;
\n x_ = atoi(str.substr(0, left).c_str());
\n y_ = atoi(str.substr(right + SPACE_LEN).c_str());
\n if (left + SPACE_LEN > str.size()) return false;
\n else op_ = str[left + SPACE_LEN];
\n return true;
\n }
\npublic:
\n Request(){}
\n Request(int x, int y, char op)
\n : x_(x)
\n , y_(y)
\n , op_(op)
\n {}
\n ~Request(){}
\npublic:
\n int x_;
\n int y_;
\n char op_; \/\/ '+', '-', '*', '\/', '%'
\n};<\/p>\n
class Response
\n{
\npublic:
\n std::string Serialize()
\n {
\n std::string s;
\n s = std::to_string(code_);
\n s += SPACE;
\n s += std::to_string(result_);
\n return s;
\n }
\n bool Deserialized(const std::string &s)
\n {
\n std::size_t pos = s.find(SPACE);
\n if (pos == std::string::npos) return false;
\n code_ = atoi(s.substr(0, pos).c_str());
\n result_ = atoi(s.substr(pos + SPACE_LEN).c_str());
\n return true;
\n }
\npublic:
\n Response(){}
\n Response(int result, int code)
\n : result_(result)
\n , code_(code)
\n {}
\n ~Response(){}
\npublic:
\n int result_; \/\/ \u8ba1\u7b97\u7ed3\u679c
\n int code_; \/\/ \u8ba1\u7b97\u7ed3\u679c\u7684\u72b6\u6001\u7801
\n};<\/p>\n
\u4ee3\u7801\u89e3\u6790<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5b9e\u73b0\u7b80\u6613\u7684\u8bf7\u6c42\u3001\u54cd\u5e94\u62a5\u6587\u5e8f\u5217\u5316\u4e0e\u53cd\u5e8f\u5217\u5316\u903b\u8f91，\u914d\u5408\u524d\u9762 Reactor \u6d88\u606f\u961f\u5217\u7684\u62a5\u6587\u5207\u5272\u6a21\u5757\u4f7f\u7528\u3002<\/p>\n
1.Encode \u51fd\u6570：<\/span>\u5728\u5e8f\u5217\u5316\u540e\u7684\u62a5\u6587\u672b\u5c3e\u8ffd\u52a0SEP\u5206\u9694\u7b26，\u6807\u8bb0\u62a5\u6587\u8fb9\u754c，\u7528\u4e8eSplitMessage\u5207\u5272\u62a5\u6587，\u89e3\u51b3 TCP \u7c98\u5305\u3002<\/p>\n2.Request \u7c7b：<\/span>\u5c01\u88c5\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u56db\u5219\u8fd0\u7b97\u8bf7\u6c42，\u6210\u5458\u5305\u542b\u4e24\u4e2a\u64cd\u4f5c\u6570 x_\u3001y_\u548c\u8fd0\u7b97\u7b26 op_\u3002<\/p>\n\n- Serialize：\u628a\u5bf9\u8c61\u6210\u5458\u62fc\u63a5\u6210x op y\u683c\u5f0f\u5b57\u7b26\u4e32，\u5b8c\u6210\u5e8f\u5217\u5316，\u7528\u4e8e\u7f51\u7edc\u53d1\u9001\u3002<\/li>\n
- Deserialized：\u63a5\u6536\u62a5\u6587\u5b57\u7b26\u4e32，\u5229\u7528find\u548crfind\u67e5\u627e\u7a7a\u683c，\u62c6\u5206\u89e3\u6790\u51fa\u4e24\u4e2a\u6570\u5b57\u548c\u8fd0\u7b97\u7b26，\u586b\u5145\u5230\u5bf9\u8c61\u6210\u5458，\u89e3\u6790\u5931\u8d25\u8fd4\u56de false\u3002<\/li>\n<\/ul>\n
3.Response \u7c7b：<\/span>\u5c01\u88c5\u670d\u52a1\u5668\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7684\u5e94\u7b54\u6570\u636e，\u5305\u542b\u8fd0\u7b97\u7ed3\u679c result_\u4e0e\u72b6\u6001\u7801 code_\u3002<\/p>\n\n- Serialize：\u5c06\u72b6\u6001\u7801\u3001\u8fd0\u7b97\u7ed3\u679c\u62fc\u63a5\u4e3acode result\u5b57\u7b26\u4e32，\u5e8f\u5217\u5316\u8f93\u51fa\u3002<\/li>\n
- Deserialized：\u67e5\u627e\u7a7a\u683c\u5206\u5272\u5b57\u7b26\u4e32，\u89e3\u6790\u5f97\u5230\u72b6\u6001\u7801\u548c\u7ed3\u679c，\u8fd8\u539f\u54cd\u5e94\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n
\u6574\u4f53\u4e1a\u52a1\u94fe\u8def：Recver \u8bfb\u53d6\u6570\u636e –>\u00a0SplitMessage \u5207\u51fa\u5b8c\u6574\u62a5\u6587 –>\u00a0Request \u53cd\u5e8f\u5217\u5316 –>\u00a0\u4e1a\u52a1\u8ba1\u7b97 –>\u00a0Response \u5bf9\u8c61\u7ec4\u88c5 –>\u00a0Response \u5e8f\u5217\u5316 –>\u00a0Encode \u8ffd\u52a0\u62a5\u6587\u5206\u9694\u7b26 –>\u00a0\u5199\u5165\u8f93\u51fa\u7f13\u51b2\u533a_outBuffer，\u5f00\u542f\u5199\u4e8b\u4ef6 –>\u00a0Dispatcher \u89e6\u53d1 Sender \u56de\u8c03\u53d1\u9001\u6570\u636e\u3002<\/p>\n
\nC. Sender<\/span><\/p>\n\n- \u5faa\u73af\u8c03\u7528 send \u51fd\u6570\u53d1\u9001\u6570\u636e，\u5e76\u5c06\u53d1\u9001\u51fa\u53bb\u7684\u6570\u636e\u4ece\u8be5\u5957\u63a5\u5b57\u5bf9\u5e94 Connection \u7ed3\u6784\u7684 _outBuffer \u4e2d\u5220\u9664\u3002<\/li>\n
- \u82e5\u5faa\u73af\u8c03\u7528 send \u51fd\u6570\u540e\u8be5\u5957\u63a5\u5b57\u5bf9\u5e94\u7684 _outBuffer \u4e2d\u7684\u6570\u636e\u88ab\u5168\u90e8\u53d1\u9001，\u6b64\u65f6\u5c31\u9700\u8981\u5c06\u8be5\u5957\u63a5\u5b57\u5bf9\u5e94\u7684\u5199\u4e8b\u4ef6\u5173\u95ed，\u56e0\u4e3a\u5df2\u6ca1\u6709\u8981\u53d1\u9001\u7684\u6570\u636e\u4e86，\u82e5 _outBuffer \u4e2d\u7684\u6570\u636e\u8fd8\u6709\u5269\u4f59，\u90a3\u4e48\u8be5\u5957\u63a5\u5b57\u5bf9\u5e94\u7684\u5199\u4e8b\u4ef6\u5c31\u5e94\u7ee7\u7eed\u6253\u5f00\u3002<\/li>\n<\/ul>\n
\/\/ \u6700\u5f00\u59cb\u65f6，conn\u662f\u6ca1\u6709\u88ab\u89e6\u53d1\u7684
\nvoid Sender(Connection *conn)
\n{
\n while(true)
\n {
\n ssize_t n = send(conn->_sock, conn->_outbuffer.c_str(), conn->_outbuffer.size(), 0);
\n if(n > 0)
\n {
\n conn->_outbuffer.erase(0, n);
\n if(conn->_outbuffer.empty()) break;
\n }
\n else
\n {
\n if(errno == EAGAIN || errno == EWOULDBLOCK) break;
\n else if(errno == EINTR) continue;
\n else
\n {
\n logMessage(ERROR, "send error, %d : %s", errno, strerror(errno));
\n conn->_except_cb(conn);
\n break;
\n }
\n }
\n }
\n \/\/ \u867d\u7136\u4e0d\u80fd\u786e\u5b9a\u662f\u5426\u53d1\u5b8c\u4e86，\u4f46\u53ef\u4ee5\u4fdd\u8bc1：\u5982\u679c\u6ca1\u6709\u51fa\u9519，\u8981\u4e48\u53d1\u5b8c\u4e86，\u8981\u4e48\u53d1\u9001\u6761\u4ef6\u4e0d\u6ee1\u8db3，\u4e0b\u6b21\u518d\u53d1\u9001
\n if(conn->_outbuffer.empty()) EnableReadWrite(conn, true, false);
\n else EnableReadWrite(conn, true, true);
\n}<\/p>\n
Sender \u662f\u5199\u4e8b\u4ef6\u56de\u8c03\u51fd\u6570，\u8d1f\u8d23\u5c06_outbuffer\u7f13\u51b2\u533a\u7684\u6570\u636e\u901a\u8fc7\u975e\u963b\u585e send \u5faa\u73af\u53d1\u9001\u3002\u53d1\u9001\u6210\u529f\u5219\u4ece\u7f13\u51b2\u533a\u79fb\u9664\u5df2\u53d1\u9001\u5b57\u8282；\u9047\u5230EAGAIN\/EWOULDBLOCK\u4ee3\u8868\u5185\u6838\u7f13\u51b2\u533a\u5df2\u6ee1，\u505c\u6b62\u53d1\u9001\u7b49\u5f85\u4e0b\u6b21\u5199\u4e8b\u4ef6；EINTR\u4ee3\u8868\u88ab\u4fe1\u53f7\u4e2d\u65ad，\u7ee7\u7eed\u91cd\u8bd5\u3002\u53d1\u751f\u5176\u4ed6\u9519\u8bef\u65f6\u89e6\u53d1\u5f02\u5e38\u56de\u8c03\u5173\u95ed\u8fde\u63a5\u3002\u51fd\u6570\u672b\u5c3e\u6839\u636e\u7f13\u51b2\u533a\u662f\u5426\u4e3a\u7a7a，\u52a8\u6001\u8c03\u6574 epoll \u76d1\u542c：\u7f13\u51b2\u533a\u4e3a\u7a7a\u5c31\u5173\u95ed\u5199\u4e8b\u4ef6，\u9632\u6b62\u7a7a\u8f6e\u8be2；\u7f13\u51b2\u533a\u8fd8\u6709\u6570\u636e，\u5219\u7ee7\u7eed\u76d1\u542c\u5199\u4e8b\u4ef6，\u7b49\u5f85\u4e0b\u6b21\u5c31\u7eea\u7ee7\u7eed\u53d1\u9001\u3002<\/p>\n
\nD.\u00a0Excepter<\/p>\n
\n- \u5bf9\u4e8e\u5f02\u5e38\u4e8b\u4ef6\u5c31\u7eea\u7684\u5957\u63a5\u5b57\u4e0d\u505a\u8fc7\u591a\u5904\u7406，\u8c03\u7528 close \u51fd\u6570\u5c06\u8be5\u5957\u63a5\u5b57\u5173\u95ed\u5373\u53ef\u3002<\/li>\n
- \u4f46\u5728\u5173\u95ed\u8be5\u5957\u63a5\u5b57\u524d，\u9700\u5148\u5c06\u8be5\u5957\u63a5\u5b57\u4ece epoll \u6a21\u578b\u4e2d\u5220\u9664，\u5e76\u53d6\u6d88\u8be5\u5957\u63a5\u5b57\u4e0e\u5176\u5bf9\u5e94\u7684 Connection \u7ed3\u6784\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/li>\n
- \u91ca\u653e Connection \u5bf9\u8c61\u3002<\/li>\n<\/ul>\n
void Excepter(Connection *conn)
\n{
\n if(!IsConnectionExists(conn->_sock)) return;
\n \/\/ 1. \u4eceepoll\u4e2d\u79fb\u9664
\n bool res = _poll.DelFromEpoll(conn->_sock);
\n assert(res); \/\/ \u8981\u8fdb\u884c\u5224\u65ad
\n \/\/ 2. \u4eceunorder_map\u4e2d\u79fb\u9664
\n _connections.erase(conn->_sock);
\n \/\/ 3. close(sock);
\n close(conn->_sock);
\n \/\/ 4. delete conn;
\n delete conn;<\/p>\n
logMessage(DEBUG, "Excepter \u56de\u6536\u5b8c\u6bd5，\u6240\u6709\u7684\u5f02\u5e38\u60c5\u51b5");
\n}<\/p>\n
\u4ee3\u7801\u89e3\u6790：<\/p>\n
\n- Excepter \u662f\u5f02\u5e38\u56de\u8c03\u51fd\u6570，\u5f53\u8fde\u63a5\u53d1\u751f\u8bfb\u5199\u9519\u8bef\u65f6，\u7528\u6765\u5b89\u5168\u56de\u6536\u8fde\u63a5\u8d44\u6e90\u3002<\/li>\n
- \u5148\u5224\u65ad\u8fde\u63a5\u662f\u5426\u8fd8\u5b58\u5728，\u5982\u679c\u4e0d\u5b58\u5728\u76f4\u63a5\u8fd4\u56de，\u9632\u6b62\u91cd\u590d\u56de\u6536\u3002<\/li>\n
- \u5c06\u5957\u63a5\u5b57\u4ece epoll \u5b9e\u4f8b\u4e2d\u5220\u9664，epoll \u4e0d\u518d\u76d1\u542c\u8be5 fd \u4e0a\u7684\u4e8b\u4ef6；assert\u7528\u6765\u8c03\u8bd5\u9636\u6bb5\u6821\u9a8c\u5220\u9664\u662f\u5426\u6210\u529f\u3002<\/li>\n
- \u4ece\u4fdd\u5b58\u6240\u6709\u8fde\u63a5\u7684unordered_map（_connections）\u4e2d\u64e6\u9664\u8fd9\u6761\u8fde\u63a5\u8bb0\u5f55\u3002<\/li>\n
- \u5173\u95ed socket \u6587\u4ef6\u63cf\u8ff0\u7b26，\u91ca\u653e\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u7684\u5957\u63a5\u5b57\u8d44\u6e90\u3002<\/li>\n
- delete conn\u91ca\u653e\u5806\u4e0a\u521b\u5efa\u7684 Connection \u5bf9\u8c61\u5185\u5b58，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n
- \u6253\u5370\u8c03\u8bd5\u65e5\u5fd7，\u6807\u8bb0\u672c\u6b21\u8fde\u63a5\u8d44\u6e90\u56de\u6536\u5b8c\u6210\u3002<\/li>\n<\/ul>\n
\u4f5c\u7528：\u4e0d\u7ba1\u662f\u8bfb\u5f02\u5e38\u3001\u5199\u5f02\u5e38\u8fd8\u662f\u5bf9\u7aef\u5173\u95ed\u8fde\u63a5，\u90fd\u4f1a\u8d70\u5230\u8fd9\u4e2a\u56de\u8c03，\u7edf\u4e00\u5b8c\u6210\u8d44\u6e90\u6e05\u7406，\u907f\u514d fd \u6cc4\u9732\u3001\u5185\u5b58\u6cc4\u9732\u3002<\/span><\/span><\/p>\n
\n（5）Socket \u5957\u63a5\u5b57<\/h4>\n
#pragma once
\n#include <iostream>
\n#include <string>
\n#include <cstring>
\n#include <cerrno>
\n#include <cassert>
\n#include <unistd.h>
\n#include <memory>
\n#include <sys\/types.h>
\n#include <sys\/socket.h>
\n#include <arpa\/inet.h>
\n#include <netinet\/in.h>
\n#include <ctype.h>
\n#include <fcntl.h><\/p>\n
class Sock
\n{
\nprivate:
\n const static int gbacklog = 10;
\npublic:
\n Sock() {}
\n static int Socket()
\n {
\n int listensock = socket(AF_INET, SOCK_STREAM, 0);
\n if (listensock < 0)
\n {
\n exit(2);
\n }
\n int opt = 1;
\n setsockopt(listensock, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt));
\n return listensock;
\n }<\/p>\n
static void Bind(int sock, uint16_t port, std::string ip = "0.0.0.0")
\n {
\n struct sockaddr_in local;
\n memset(&local, 0, sizeof local);
\n local.sin_family = AF_INET;
\n local.sin_port = htons(port);
\n inet_pton(AF_INET, ip.c_str(), &local.sin_addr);
\n if (bind(sock, (struct sockaddr *)&local, sizeof(local)) < 0)
\n {
\n exit(3);
\n }
\n }<\/p>\n
static void Listen(int sock)
\n {
\n if (listen(sock, gbacklog) < 0)
\n {
\n exit(4);
\n }
\n }<\/p>\n
static int Accept(int listensock, std::string *ip, uint16_t *port, int *accept_errno)
\n {
\n struct sockaddr_in src;
\n socklen_t len = sizeof(src);
\n *accept_errno = 0;
\n int servicesock = accept(listensock, (struct sockaddr *)&src, &len);
\n if (servicesock < 0)
\n {
\n *accept_errno = errno;
\n return -1;
\n }
\n if(port) *port = ntohs(src.sin_port);
\n if(ip) *ip = inet_ntoa(src.sin_addr);
\n return servicesock;
\n }<\/p>\n
static bool Connect(int sock, const std::string &server_ip, const uint16_t &server_port)
\n {
\n struct sockaddr_in server;
\n memset(&server, 0, sizeof(server));
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port);
\n server.sin_addr.s_addr = inet_addr(server_ip.c_str());
\n if(connect(sock, (struct sockaddr*)&server, sizeof(server)) == 0) return true;
\n else return false;
\n }<\/p>\n
static bool SetNonBlock(int sock)
\n {
\n int fl = fcntl(sock, F_GETFL);
\n if(fl < 0) return false;
\n fcntl(sock, F_SETFL, fl | O_NONBLOCK);
\n return true;
\n }<\/p>\n
~Sock() {}
\n};<\/p>\n
sock\u662f\u5c01\u88c5 socket \u57fa\u7840\u64cd\u4f5c\u7684\u5de5\u5177\u7c7b，\u5168\u90e8\u4e3a\u9759\u6001\u65b9\u6cd5，\u7edf\u4e00\u5c01\u88c5 TCP \u7f51\u7edc\u7f16\u7a0b\u7684\u57fa\u7840\u63a5\u53e3，\u63d0\u4f9b\u521b\u5efa\u5957\u63a5\u5b57\u3001\u7ed1\u5b9a\u3001\u76d1\u542c\u3001\u63a5\u53d7\u8fde\u63a5\u3001\u5ba2\u6237\u7aef\u8fde\u63a5\u3001\u8bbe\u7f6e\u975e\u963b\u585e\u7b49\u80fd\u529b\u3002<\/p>\n
\n- Socket()：\u521b\u5efa TCP \u76d1\u542c\u5957\u63a5\u5b57，\u5e76\u4e14\u8bbe\u7f6e\u7aef\u53e3\u590d\u7528\u4e0e\u5730\u5740\u590d\u7528，\u670d\u52a1\u7aef\u91cd\u542f\u53ef\u4ee5\u5feb\u901f\u590d\u7528\u7aef\u53e3\u3002\u5931\u8d25\u76f4\u63a5\u9000\u51fa\u7a0b\u5e8f\u3002<\/li>\n
- Bind()：\u586b\u5145\u672c\u673a\u5730\u5740\u7ed3\u6784\u4f53，\u8c03\u7528 bind \u5c06 socket \u7ed1\u5b9a\u5230\u6307\u5b9a IP \u4e0e\u7aef\u53e3\u3002\u9ed8\u8ba4\u7ed1\u5b9a0.0.0.0，\u76d1\u542c\u672c\u673a\u6240\u6709\u7f51\u5361\u3002<\/li>\n
- Listen()：\u5f00\u542f\u76d1\u542c，gbacklog \u4e3a 10，\u8bbe\u7f6e TCP \u534a\u8fde\u63a5\u961f\u5217\u957f\u5ea6\u3002<\/li>\n
- Accept()：\u963b\u585e\u63a5\u53d7\u65b0\u8fde\u63a5，\u8f93\u51fa\u5bf9\u7aef IP\u3001\u7aef\u53e3，\u540c\u65f6\u5e26\u56de accept \u8c03\u7528\u7684\u9519\u8bef\u7801；\u8fd4\u56de\u65b0\u8fde\u63a5\u7684 socket \u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/li>\n
- Connect()：\u5ba2\u6237\u7aef\u4f7f\u7528，\u5411\u6307\u5b9a IP \u7aef\u53e3\u53d1\u8d77 TCP \u8fde\u63a5，\u8fde\u63a5\u6210\u529f\u8fd4\u56de true\u3002<\/li>\n
- SetNonBlock()：\u901a\u8fc7fcntl\u628a\u6307\u5b9a socket \u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f，\u8fd9\u662f Reactor \u9ad8\u5e76\u53d1\u6a21\u578b\u7684\u57fa\u7840\u3002<\/li>\n<\/ul>\n
\u8bf4\u660e：\u8fd9\u4e2a\u5de5\u5177\u7c7b\u662f\u6574\u4e2a Reactor \u6d88\u606f\u961f\u5217\u5e95\u5c42\u7f51\u7edc\u57fa\u7840，Sock::SetNonBlock\u628a\u6240\u6709\u8fde\u63a5 socket \u8bbe\u7f6e\u975e\u963b\u585e，\u914d\u5408 epoll + \u56db\u4e2a\u56de\u8c03\u51fd\u6570（Accepter\u3001Recver\u3001Sender\u3001Excepter）\u5b9e\u73b0\u4e8b\u4ef6\u9a71\u52a8\u670d\u52a1\u5668<\/p>\n
\n（6）\u4ee3\u7801\u6f14\u793a<\/h4>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002629-6ac834b540278.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002630-6ac834b65c089.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002631-6ac834b7152f7.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002631-6ac834b77bbf7.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002632-6ac834b80c2aa.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002634-6ac834ba1bc8b.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002634-6ac834ba9a4ea.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002636-6ac834bce9979.png\")
<\/p>\n
\n（7）\u670d\u52a1\u5668\u6d4b\u8bd5<\/h4>\n
\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5\u540e，\u670d\u52a1\u7aef\u4f1a\u4e3a\u8be5\u8fde\u63a5\u5206\u914d 5 \u53f7\u6587\u4ef6\u63cf\u8ff0\u7b26，4 \u53f7\u6587\u4ef6\u63cf\u8ff0\u7b26\u7531 epoll \u5360\u7528\u3002\u5ba2\u6237\u7aef\u53ef\u5411\u670d\u52a1\u7aef\u63d0\u4ea4\u591a\u9879\u7b80\u5355\u8ba1\u7b97\u4efb\u52a1，\u5148\u8fdb\u884c\u8fd0\u884c：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002637-6ac834bd05001.png\")
<\/p>\n
\u8fd9\u4e2a\u662f\u4e00\u6761\u6761\u7684\u53d1\u9001，\u4f46\u5728\u771f\u5b9e\u7684\u4e1a\u52a1\u573a\u666f\u4e2d，\u80af\u5b9a\u5f88\u591a\u6761\u6570\u636e\u4e00\u8d77\u53d1\u9001，\u6211\u4eec\u7ee7\u7eed\u6765\u6f14\u793a：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002637-6ac834bd35b74.png\")
<\/p>\n
\u4e00\u6b21\u53d1\u5f88\u5bf9\u6761，\u6f14\u793a\u7c98\u5305\u95ee\u9898：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002637-6ac834bdee704.png\")
<\/p>\n
\u8fd9\u91cc\u6211\u4eec\u4f1a\u53d1\u73b09+\u8fd9\u4e2a\u8ba1\u7b97\u8868\u8fbe\u5f0f\u5b50\u6ca1\u6709\u663e\u793a\u51fa\u6765<\/p>\n
\u65e5\u5fd7\u53ef\u4ee5\u770b\u5230，\u670d\u52a1\u7aef\u7b2c\u4e00\u6b21 recv \u53ea\u8bfb\u5230 1 \u6761\u62a5\u6587（1 + 1），\u7b2c\u4e8c\u6b21\u5374\u4e00\u53e3\u6c14\u8bfb\u5230\u4e86 2 \u6761（3 * 8 \u548c 8 \/ 0）\u2014\u2014\u8fd9\u5c31\u662f"\u7c98\u5305"\u3002\u6839\u672c\u539f\u56e0\u5728\u4e8e TCP \u662f\u5b57\u8282\u6d41，\u4e0d\u4fdd\u8bc1\u6d88\u606f\u8fb9\u754c：recv \u4e00\u6b21\u80fd\u8bfb\u5230\u591a\u5c11，\u53ea\u53d6\u51b3\u4e8e\u8c03\u7528\u5b83\u7684\u90a3\u4e00\u523b\u5185\u6838\u63a5\u6536\u7f13\u51b2\u533a\u91cc\u79ef\u4e86\u591a\u5c11\u5b57\u8282，\u4e0e\u53d1\u9001\u65b9\u53d1\u4e86\u51e0\u6b21\u65e0\u5173\u3002\u800c\u670d\u52a1\u7aef\u5e76\u6ca1\u6709\u628a\u8fd9\u4e24\u6761\u5f53\u6210\u4e00\u6761\u5904\u7406\u2014\u2014_inbuffer \u5148\u628a\u6570\u636e\u6512\u4e0b\u6765，SpliteMessage \u518d\u6309 \\\\r\\\\n \u9010\u6761\u5207\u5206，\u6700\u7ec8 NetCal \u88ab\u51c6\u786e\u8c03\u7528\u4e86 2 \u6b21\u3002\u8fd9\u6b63\u662f _inbuffer + \u5206\u9694\u7b26\u5faa\u73af\u5207\u5206\u5b58\u5728\u7684\u610f\u4e49：\u7f13\u51b2\u533a\u8d1f\u8d23"\u6512"，\u5faa\u73af\u8d1f\u8d23"\u5207"<\/span><\/span>\u3002<\/p>\n
\n\u7531\u4e8e\u4f7f\u7528\u4e86\u591a\u8def\u8f6c\u63a5\u6280\u672f，\u867d\u7136 epoll \u670d\u52a1\u5668\u662f\u4e00\u4e2a\u5355\u8fdb\u7a0b\u7684\u670d\u52a1\u5668，\u4f46\u5374\u53ef\u540c\u65f6\u4e3a\u591a\u4e2a\u5ba2\u6237\u7aef\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002638-6ac834be5acd7.png\")
<\/p>\n
\n（8）\u603b\u7ed3<\/h4>\n
\u57fa\u4e8e IO \u591a\u8def\u8f6c\u63a5，\u5f53\u68c0\u6d4b\u5230\u4e8b\u4ef6\u5c31\u7eea\u540e，\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u6267\u884c\u4e1a\u52a1\u903b\u8f91\u7684\u7f16\u7a0b\u6a21\u578b，\u53eb\u505a\u53cd\u5e94\u5806（Reactor）\u6a21\u5f0f<\/span>\u3002\u4e0a\u9762\u4ee3\u7801\u4e2d\u7684 TcpServer \u5c31\u662f\u4e00\u4e2a\u53cd\u5e94\u5806\u5b9e\u4f8b，\u800c\u6bcf\u4e00\u4e2a Connection \u5bf9\u8c61\u4ee3\u8868\u4e00\u4e2a\u4e8b\u4ef6\u3002\u6bcf\u4e2a\u4e8b\u4ef6\u5185\u90e8\u5305\u542b：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261009002626-6ac834b2e0769.png\")
<\/p>\n