Connection模块类功能联调(整合三)

2026/8/20 21:43:41 拓冰建站浏览量

概要

tcp_cli.cc

tcp_srv.cc

server.hpp

测试结果

第三次整合

概要

本主要是将以下模块进行整合测试

Connection管理类实现(模块六)-CSDN博客

EventLoop整合与TimerWheel联合调试(整合二)-CSDN博客

tcp_cli.cc

#include "../source/server.hpp"int main()
{Socket cli_sock;cli_sock.CreateClient(8500, "127.0.0.1");for(int i = 0; i < 5; i++){std::string str = "hello qingfengyuge!";cli_sock.Send(str.c_str(), str.size());char buf[1024] = {0};cli_sock.Recv(buf, 1023);DBG_LOG("%s", buf);sleep(1);}while (1) sleep(1);return 0;
}

tcp_srv.cc

#include "../source/server.hpp"// 管理所有的连接
std::unordered_map<uint64_t, PtrConnection> _conns;
uint64_t conn_id = 0;
void ConnectionDestroy(const PtrConnection &conn)
{_conns.erase(conn->Id());
}
void OnConnected(const PtrConnection &conn)
{DBG_LOG("NEW CONNECTION:%p", conn.get());
}
void OnMessage(const PtrConnection &conn, Buffer *buf)
{DBG_LOG("%s", buf->ReadPosition());buf->MoveReadOffset(buf->ReadAbleSize());std::string str = "Hello World";conn->Send(str.c_str(), str.size());// conn->Shutdown(); // 调用关闭接口
}void Acceptor(EventLoop *loop, Channel *lst_channel)
{int fd = lst_channel->Fd();int newfd = accept(fd, NULL, NULL);if (newfd < 0){return;}conn_id++;PtrConnection conn(new Connection(loop, conn_id, newfd));conn->SetMessageCallback(std::bind(OnMessage, std::placeholders::_1, std::placeholders::_2));conn->SetSrvClosedCallback(std::bind(ConnectionDestroy, std::placeholders::_1));conn->SetConnectedCallback(std::bind(OnConnected, std::placeholders::_1));           conn->EnableInactiveRelease(10); // 启动非活跃超时销毁conn->Established(); // 就绪初始化_conns.insert(std::make_pair(conn_id, conn));
}int main()
{srand(time(NULL));EventLoop loop;Socket lst_sock;bool ret = lst_sock.CreateServer(8500);// 为监听套接字,创建一个Channel进行事件的管理,以及事件的处理Channel channel(&loop, lst_sock.Fd());// 回调中,获取新连接,为新连接创建Channel并且添加监控channel.SetReadCallback(std::bind(Acceptor, &loop, &channel));channel.EnableRead(); // 启动可读事件监控while (1){loop.Start();}lst_sock.Close();return 0;
}

server.hpp

#include <iostream>
#include <vector>
#include <cstdint>
#include <cassert>
#include <ctime>
#include <cstring>
#include <string>
#include <unistd.h>
#include <typeinfo>
#include <thread>
#include <mutex>
#include <memory>
#include <fcntl.h>
#include <functional>
#include <unordered_map>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/timerfd.h>
#include <sys/socket.h>
#include <sys/types.h>#define INF 0
#define DBG 1
#define ERR 2
#define LOG_LEVEL DBG#define LOG(level, format, ...)                                                             \do                                                                                      \{                                                                                       \if (level < LOG_LEVEL)                                                              \break;                                                                          \time_t t = time(NULL);                                                              \struct tm *ltm = localtime(&t);                                                     \char tmp[32] = {0};                                                                 \strftime(tmp, 31, "%H:%M:%S", ltm);                                                 \fprintf(stdout, "[%s %s:%d] " format "\n", tmp, __FILE__, __LINE__, ##__VA_ARGS__); \} while (0)#define INF_LOG(format, ...) LOG(INF, format, ##__VA_ARGS__)
#define DBG_LOG(format, ...) LOG(DBG, format, ##__VA_ARGS__)
#define ERR_LOG(format, ...) LOG(ERR, format, ##__VA_ARGS__)// 缓冲区类
#define BUFFER_DEFAULT_SIZE 1024 // Buffer 默认起始大小
class Buffer
{
private:std::vector<char> _buffer; // 使用vector进行内存空间管理uint64_t _reader_idx;      // 读偏移uint64_t _writer_idx;      // 写偏移
public:Buffer() : _reader_idx(0), _writer_idx(0), _buffer(BUFFER_DEFAULT_SIZE) {}char *Begin() { return &*_buffer.begin(); }// 获取当前写入起始地址char *WritePosition() { return Begin() + _writer_idx; }// 获取当前读取起始地址char *ReadPosition() { return Begin() + _reader_idx; }// 获取缓冲区末尾空闲空间大小--写偏移之后的空闲空间, 总体空间大小减去写偏移uint64_t TailIdleSize() { return _buffer.size() - _writer_idx; }// 获取缓冲区起始空闲空间大小--读偏移之前的空闲空间uint64_t HeadIdleSize() { return _reader_idx; }// 获取可读数据大小 = 写偏移 - 读偏移uint16_t ReadAbleSize() { return _writer_idx - _reader_idx; };// 将读偏移向后移动void MoveReadOffset(uint64_t len){if (len == 0)return;// 向后移动的大小, 必须小于可读数据大小assert(len <= ReadAbleSize());_reader_idx += len;}// 将写偏移向后移动void MoveWriteOffset(uint64_t len){// 向后移动的大小,必须小于当前后边的空闲空间大小assert(len <= TailIdleSize());_writer_idx += len;}// 确保可写空间足够(整体空闲空间够了就移动数据,否则就扩容)void EnsureWriteSpace(uint64_t len){// 如果末尾空闲空间大小足够,直接返回if (TailIdleSize() >= len){return;}// 末尾空闲空间不够,则判断加上起始位置的空闲空间大小是否足够,够了就将数据移动到起始位置if (len <= TailIdleSize() + HeadIdleSize()){// 将数据移动到起始位置uint64_t rsz = ReadAbleSize();                            // 把当前数据大小先保存起来std::copy(ReadPosition(), ReadPosition() + rsz, Begin()); // 把可读数据拷贝到起始位置_reader_idx = 0;                                          // 将读偏移归0_writer_idx = rsz;                                        // 将写位置置为可读数据大小, 因为当前的可读数据大小就是写偏移量}else{// 总体空间不够,则需要扩容,不移动数据,直接给写偏移之后扩容足够空间即可_buffer.resize(_writer_idx + len);}}// 写入数据void Write(const void *data, uint64_t len){// 1.保证有足够空间， 2.拷贝数据进去EnsureWriteSpace(len);const char *d = (const char *)data;std::copy(d, d + len, WritePosition());}void WriteAndPush(const void *data, uint64_t len){Write(data, len);MoveWriteOffset(len);}void WriteString(const std::string &data){return Write(data.c_str(), data.size());}void WriteStringAndPush(const std::string &data){WriteString(data);MoveWriteOffset(data.size());}void WriteBuffer(Buffer &data){return Write(data.ReadPosition(), data.ReadAbleSize());}void WriteBufferAndPush(Buffer &data){WriteBuffer(data);MoveWriteOffset(data.ReadAbleSize());}// 读取数据void Read(void *buf, uint64_t len){// 要求获取的数据大小必须小于可读数据大小assert(len <= ReadAbleSize());std::copy(ReadPosition(), ReadPosition() + len, (char *)buf);}void ReadAndPop(void *buf, uint64_t len){Read(buf, len);MoveReadOffset(len);}std::string ReadAsString(uint64_t len){// 要求获取的数据大小必须小于可读数据大小assert(len <= ReadAbleSize());std::string str;str.resize(len);Read(&str[0], len); // 这里不直接用str.c_str()的原因是，这个的返回值是const类型return str;}std::string ReadAsStringAndPop(uint64_t len){assert(len <= ReadAbleSize());std::string str = ReadAsString(len);MoveReadOffset(len);return str;}char *FindCRLF(){char *res = (char *)memchr(ReadPosition(), '\n', ReadAbleSize());return res;}// 这种情况针对的是,通常获取一行数据std::string GetLine(){char *pos = FindCRLF();if (pos == NULL)return "";// +1 是为了把换行字符也取出来return ReadAsString(pos - ReadPosition() + 1);}std::string GetLineAndPop(){std::string str = GetLine();MoveReadOffset(str.size());return str;}// 清空缓冲区void Clear(){// 只需要将偏移量归0即可_reader_idx = 0;_writer_idx = 0;}
};// 套接字类
#define MAX_LISTEN 1024
class Socket
{
private:int _sockfd;public:Socket() : _sockfd(-1) {}Socket(int fd) : _sockfd(fd) {}~Socket() { Close(); };int Fd() { return _sockfd; }// 创建套接字bool Create(){// int socket(int domain, int type, int protocol)_sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (_sockfd < 0){ERR_LOG("CREATE SOCKET FAILED!");return false;}return true;}// 绑定地址信息bool Bind(const std::string &ip, uint64_t port){struct sockaddr_in addr;addr.sin_family = AF_INET;addr.sin_port = htons(port);addr.sin_addr.s_addr = inet_addr(ip.c_str());socklen_t len = sizeof(struct sockaddr_in);// int bind(int sockfd, struct sockaddr* addr, socklen_t len)int ret = bind(_sockfd, (struct sockaddr *)&addr, len);if (ret < 0){ERR_LOG("BIND ADDRESS FAILED!");return false;}return true;}// 开始监听bool Listen(int backlog = MAX_LISTEN){// int listen(int backlog)int ret = listen(_sockfd, backlog);if (ret < 0){ERR_LOG("SOCKET LISTEN FAILED!");return false;}return true;}// 向服务器发起连接bool Connect(const std::string &ip, uint16_t port){struct sockaddr_in addr;addr.sin_family = AF_INET;addr.sin_port = htons(port);addr.sin_addr.s_addr = inet_addr(ip.c_str());socklen_t len = sizeof(struct sockaddr_in);// int connect(int sockfd, struct sockaddr* addr, socklen_t len)int ret = connect(_sockfd, (struct sockaddr *)&addr, len);if (ret < 0){ERR_LOG("CONNECT SERVER FAILED!");return false;}return true;}// 获取新连接int Accept(){// int accept(int sockfd, struct sockaddr *addr, socklen_t *len);int newfd = accept(_sockfd, NULL, NULL);if (newfd < 0){ERR_LOG("SOCKET ACCEPT FAILED!");return -1;}return newfd;}// 接收数据ssize_t Recv(void *buf, size_t len, int flag = 0) // 0 阻塞{// ssize_t recv(int sockfd, void *buf, size_t len, int flag)ssize_t ret = recv(_sockfd, buf, len, flag);if (ret <= 0){// EAGAIN 当前的接收缓冲区中没用数据了,在非阻塞的情况下才有这个错误// EINTR 表示当前socket的阻塞等待,被信号打断了if (errno == EAGAIN || errno == EINTR){return 0; // 表示这次没用接收到数据}ERR_LOG("SOCKET RECV FAILED!");return -1;}return ret; // 实际接收的数据长度}ssize_t NonBlockRecv(void *buf, size_t len){return Recv(buf, len, MSG_DONTWAIT); // MSG_DONTWAIT 表示当前接收为非阻塞}// 发送数据ssize_t Send(const void *buf, size_t len, int flag = 0){// ssize_t send(int sockfd, void *data, size_t len, int flag)ssize_t ret = send(_sockfd, buf, len, flag);if (ret < 0){if (errno == EAGAIN || errno == EINTR){return 0;}ERR_LOG("SOCKET SEND FAILED!!");return -1;}return ret; // 实际发送的数据长度}ssize_t NonBlockSend(void *buf, size_t len){if (len == 0)return 0;return Send(buf, len, MSG_DONTWAIT); // MSG_DONTWAIT 表示当前接收为非阻塞}// 关闭套接字void Close(){if (_sockfd != -1){close(_sockfd);_sockfd = -1;}}// 创建一个服务器连接bool CreateServer(uint16_t port, const std::string &ip = "0.0.0.0", bool block_flag = false) // 接收全部{// 1.创建套接字 2.绑定地址 3.开始监听 4.设置非阻塞 5.启动地址重用if (Create() == false)return false;if (block_flag) // 默认阻塞NonBlock();if (Bind(ip, port) == false)return false;if (Listen() == false)return false;ReuseAddress();return true;}// 创建一个客户端连接bool CreateClient(uint16_t port, const std::string &ip){// 1.创建套接字 2.指向连接服务器if (Create() == false)return false;if (Connect(ip, port) == false)return false;return true;}// 设置套接字选项 -- 开启地址端口重用void ReuseAddress(){// int setsockopt(int fd, int level, int optname, void *val, int vallen)int val = 1;setsockopt(_sockfd, SOL_SOCKET, SO_REUSEADDR, (void *)&val, sizeof(int)); // 地址val = 1;setsockopt(_sockfd, SOL_SOCKET, SO_REUSEPORT, (void *)&val, sizeof(int)); // 端口号}// 设置套接字阻塞属性 -- 设置为非阻塞void NonBlock(){// int fcntl(int fd, int cmd, .../*arg*/)int flag = fcntl(_sockfd, F_GETFL, 0);fcntl(_sockfd, F_SETFL, flag | O_NONBLOCK);}
};class Poller; // 整合测试1：声明
class EventLoop;
// Channel类
class Channel
{
private:int _fd;EventLoop *_loop;uint32_t _events;  // 当前需要监控的事件uint32_t _revents; // 当前连接触发的事件using EventCallback = std::function<void()>;EventCallback _read_callback;  // 可读事件被触发的回调函数EventCallback _write_callback; // 可写事件被触发的回调函数EventCallback _error_callback; // 错误事件被触发的回调函数EventCallback _close_callback; // 连接断开事件被触发的回调函数EventCallback _event_callback; // 任意事件被触发的回调函数
public:Channel(EventLoop *loop, int fd) : _fd(fd), _events(0), _revents(0), _loop(loop) {}int Fd() { return _fd; }uint32_t Events() { return _events; } // 获取想要监控的事件void SetREvents(uint32_t events) { _revents = events; }void SetReadCallback(const EventCallback &cb) { _read_callback = cb; } // 设置实际就绪的事件void SetWriteCallback(const EventCallback &cb) { _write_callback = cb; }void SetErrorCallback(const EventCallback &cb) { _error_callback = cb; }void SetCloseCallback(const EventCallback &cb) { _close_callback = cb; }void SetEventCallback(const EventCallback &cb) { _event_callback = cb; }// 当前是否监控了可读bool ReadAble() { return (_events & EPOLLIN); }// 当前是否监控了可写bool WriteAble() { return (_events & EPOLLOUT); }// 启动读事件监控void EnableRead(){_events |= EPOLLIN;Update();}// 启动写事件监控void EnableWrite(){_events |= EPOLLOUT;Update();}// 关闭读事件监控void DisableRead(){_events &= ~EPOLLIN;Update();}// 关闭写事件监控void DisableWrite(){_events &= ~EPOLLOUT;Update();}// 关闭所有事件监控void DisableAll(){_events = 0;Update();}// 移除监控void Remove(); // 声明和实现要分离,因为实现的时候是不知道里面有什么函数成员的void Update(); // 这两个特殊,所以把实现放在Poller类的下面进行实现// 事件处理,一旦触发了事件,就调用这个函数,自己触发了什么事件如何处理自己决定void HandleEvent(){// 第二参数,对方关闭连接,第三参数,带外数据if ((_revents & EPOLLIN) || (_revents & EPOLLRDHUP) || (_revents & EPOLLPRI)){if (_event_callback) // 不管任何事件,都调用的回调函数_event_callback();if (_read_callback)_read_callback();}/*有可能会释放连接的操作事件,一次只处理一个*/if (_revents & EPOLLOUT){if (_event_callback)_event_callback(); // 放到事件处理完毕后调用,刷新活跃度if (_write_callback)_write_callback();}else if (_revents & EPOLLERR){if (_event_callback)_event_callback();if (_error_callback)_error_callback();}else if (_revents & EPOLLHUP){if (_event_callback)_event_callback();if (_close_callback)_close_callback();}}
};// Poller描述符监控类
#define MAX_EPOLLEVENTS 1024
class Poller
{
private:int _epfd;struct epoll_event _evs[MAX_EPOLLEVENTS];std::unordered_map<int, Channel *> _channels;private:// 对epoll的直接操作void Update(Channel *channel, int op){// int epoll_ctl(int epfd, int op, int fd, struct epoll_event *ev)int fd = channel->Fd();struct epoll_event ev;ev.data.fd = fd;ev.events = channel->Events();int ret = epoll_ctl(_epfd, op, fd, &ev);if (ret < 0){ERR_LOG("EPOLLCTL FAILED!");}return;}// 判断一个Channel 是否已经添加了事件监控bool HasChannel(Channel *channel){auto it = _channels.find(channel->Fd());if (it == _channels.end()){return false;}return true;}public:Poller(){_epfd = epoll_create(MAX_EPOLLEVENTS); // 这个值大于0就行了,无用处if (_epfd < 0){ERR_LOG("EPOLL CREATE FAILED!");abort(); // 退出程序}}// 添加或修改监控事件void UpdateEvent(Channel *channel){bool ret = HasChannel(channel);if (ret == false){// 不存在则添加_channels.insert(std::make_pair(channel->Fd(), channel));return Update(channel, EPOLL_CTL_ADD);}return Update(channel, EPOLL_CTL_MOD);}// 移除监控void RemoveEvent(Channel *channel){auto it = _channels.find(channel->Fd());if (it != _channels.end()){_channels.erase(it);}Update(channel, EPOLL_CTL_DEL);}// 开始监控, 返回活跃连接void Poll(std::vector<Channel *> *active){// int epoll_wait(int epfd, struct epoll_event *evs, int maxevents, int timeout);int nfds = epoll_wait(_epfd, _evs, MAX_EPOLLEVENTS, -1); // -1阻塞监控if (nfds < 0){if (errno == EINTR) // 信号打断{return;}ERR_LOG("EPOLL WAIT ERROR:%s\n", strerror(errno));abort();}for (int i = 0; i < nfds; i++) // 添加活跃信息{auto it = _channels.find(_evs[i].data.fd); // 没找到就说明不在我们的管理之下,这是不正常的assert(it != _channels.end());it->second->SetREvents(_evs[i].events); // 设置实际就绪的事件active->push_back(it->second);}return;}
};// timerwheel时间轮定时器类
using TaskFunc = std::function<void()>;
using ReleaseFunc = std::function<void()>;
class TimerTask
{
private:uint64_t _id;         // 定时器任务对象uint32_t _timeout;    // 定时任务的超时时间bool _canceled;       // false-表示没有被取消，true-表示被取消TaskFunc _task_cb;    // 定时器要执行的定时任务ReleaseFunc _release; // 用于删除TimerWheel中保存的定时器对象信息
public:TimerTask(uint64_t id, uint32_t delay, const TaskFunc &cb) : _id(id), _timeout(delay), _task_cb(cb), _canceled(false) {}~TimerTask(){if (_canceled == false)_task_cb();_release();}void Cancel() { _canceled = true; }void SetRelease(const ReleaseFunc &cb) { _release = cb; }uint32_t DelayTime() { return _timeout; } // 返回时间
};class TimerWheel
{
private:using WeakTask = std::weak_ptr<TimerTask>;using PtrTask = std::shared_ptr<TimerTask>;int _tick;     // 当前的的秒针，走到哪里哪里就释放执行int _capacity; // 表盘最大数量 -- 其实就是最大延迟时间std::vector<std::vector<PtrTask>> _wheel;// 用weak_ptr来构造出新的shared_ptr用来计数，不过后续要记得释放std::unordered_map<uint64_t, WeakTask> _timers;EventLoop *_loop;int _timerfd; // 定时器描述符 -- 可读事件回调就是读取计数器,执行定时任务std::unique_ptr<Channel> _timer_channel;private:void RemoveTimer(uint64_t id){auto it = _timers.find(id);if (it != _timers.end()){_timers.erase(it);}}static int CreateTimerfd(){// int timerfd_create(int clockid, int flags);int timerfd = timerfd_create(CLOCK_MONOTONIC, 0);if (timerfd < 0){ERR_LOG("TIMERFD CREATE FAILED!");abort();}// int timerfd_settime(int fd, int flags, struct itimerspec *new, struct itimerspec);struct itimerspec itime;itime.it_value.tv_sec = 1;                 // 设置 秒钟itime.it_value.tv_nsec = 0;                // 设置 纳秒 第一次超时时间为1s后itime.it_interval.tv_sec = 1;              // 同上itime.it_interval.tv_nsec = 0;             // 第一次超时后，每隔超时的间隔时timerfd_settime(timerfd, 0, &itime, NULL); // 0代表阻塞式return timerfd;}void ReadTimefd(){uint64_t times;int ret = read(_timerfd, &times, 8);if (ret < 0){perror("READ TIMERFD FAILED!");abort();}return;}// 这个函数应该每秒钟被执行一次，相当于秒钟向后走了一步void RunTimerTask(){_tick = (_tick + 1) % _capacity;_wheel[_tick].clear(); // 清空指定位置的数组，就会把数组中保存的所有管理定时器对象的shared_ptr释放掉.从而执行函数}void OnTime(){ReadTimefd();RunTimerTask();}void TimerAddInLoop(uint64_t id, uint32_t delay, const TaskFunc &cb) // 添加定时任务{PtrTask pt(new TimerTask(id, delay, cb));                      // 实例化定时任务对象pt->SetRelease(std::bind(&TimerWheel::RemoveTimer, this, id)); // 第0个位置是隐藏的this指针。再把任务id绑定进去int pos = (_tick + delay) % _capacity;_wheel[pos].push_back(pt);_timers[id] = WeakTask(pt);}// 刷新/延迟定时任务void TimerRefreshInLoop(uint64_t id){// 通过保存的定时器对象的weak_ptr构造一个shared_ptr出来, 添加到轮子中auto it = _timers.find(id);if (it == _timers.end()){return; // 没找到定时任务, 没法刷新，没法延迟}PtrTask pt = it->second.lock(); // lock获取weak_ptr管理的对象对应的shared_ptrint delay = pt->DelayTime();    // 获取到了初始的延迟时间int pos = (_tick + delay) % _capacity;_wheel[pos].push_back(pt);}void TimerCancelInLoop(uint64_t id){auto it = _timers.find(id);if (it == _timers.end()){return; // 没找到定时任务, 没法刷新，没法延迟}PtrTask pt = it->second.lock(); // 当还没有过期才进行取消if (pt)pt->Cancel();}public:TimerWheel(EventLoop *loop) : _capacity(60), _tick(0), _wheel(_capacity), _loop(loop),_timerfd(CreateTimerfd()), _timer_channel(new Channel(_loop, _timerfd)){_timer_channel->SetReadCallback(std::bind(&TimerWheel::OnTime, this));_timer_channel->EnableRead(); // 启动读事件监控}/*定时器中有个_timers成员,定时器信息的操作有可能在多线程中进行,因此需要考虑线程安全问题*//*如果不想加锁,那就把对定期的所有操作,都放在一个线程中进行*/void TimerAdd(uint64_t id, uint32_t delay, const TaskFunc &cb);// 刷新/延迟定时任务void TimerRefresh(uint64_t id);void TimerCancel(uint64_t id);/*这个接口存在线程安全问题--这个接口实际上不能被外界使用者调用,只能在模块内,对应的EventLoop线程内执行*/bool HasTimer(uint64_t id){auto it = _timers.find(id);if (it == _timers.end()){return false; // 没找到定时任务, 没法刷新，没法延迟}return true;}
};// EventLoop事件监控处理类
class EventLoop
{
private:using Functor = std::function<void()>;std::thread::id _thread_id;              // 线程IDint _event_fd;                           // eventfd唤醒IO事件监控有可能导致的阻塞std::unique_ptr<Channel> _event_channel; // 智能指针Poller _poller;                          // 进行所有描述符的事件监控std::vector<Functor> _tasks;             // 任务池std::mutex _mutex;                       // 实现任务池操作的线程安全TimerWheel _timer_wheel;                 // 定时器模块
public://  执行任务池中的所有任务void RunAllTask(){std::vector<Functor> functor;{std::unique_lock<std::mutex> _lock(_mutex);_tasks.swap(functor);}for (auto &f : functor){f();}return;}static int CreateEventFd(){int efd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);if (efd < 0){ERR_LOG("CREATE EVENTFD FAILED!!");abort(); // 让程序异常退出}return efd;}void ReadEventfd(){uint64_t res = 0;int ret = read(_event_fd, &res, sizeof(res));if (ret < 0){// EINTR -- 被信号打断, EAGAIN -- 表示无数据可读if (errno == EINTR || EAGAIN){return;}ERR_LOG("READ EVENTFD FAILED!");abort();}return;}void WeakUpEventFd(){uint64_t val = 1;int ret = write(_event_fd, &val, sizeof(val));if (ret < 0){if (errno == EINTR){return;}ERR_LOG("READ EVENTFD FAILED!");abort();}return;}public:EventLoop() : _thread_id(std::this_thread::get_id()),_event_fd(CreateEventFd()),_event_channel(new Channel(this, _event_fd)),_timer_wheel(this){// 给eventfd添加可读事件回调函数,读取eventfd事件通知次数_event_channel->SetReadCallback(std::bind(&EventLoop::ReadEventfd, this));// 启动eventfd的读事件监控_event_channel->EnableRead();}// 三步走--事件监控-》就绪事件处理-》执行任务void Start(){// 1.事件监控std::vector<Channel *> actives;_poller.Poll(&actives);// 2.事件处理for (auto &channel : actives){channel->HandleEvent();}// 3.执行任务RunAllTask();}// 用于判断当前线程是否是EventLoop对应的线程bool IsInLoop(){return (_thread_id == std::this_thread::get_id());}void AssertInLoop(){assert(_thread_id == std::this_thread::get_id());}// 判断将要执行的任务是否处于当前线程中,如果是则执行,否则压入队列void RunInLoop(const Functor &cb){if (IsInLoop()){return cb();}return QueueInLoop(cb);}// 将操作压入任务池void QueueInLoop(const Functor &cb){{std::unique_lock<std::mutex> _lock(_mutex);_tasks.push_back(cb);}// 唤醒有可能因为没有事件就绪,而导致的epoll阻塞// 其实就是给eventfd写入一个数据,eventfd就会触发可读事件WeakUpEventFd();}// 添加/修改描述符的事件监控void UpdateEvent(Channel *channel) { return _poller.UpdateEvent(channel); }// 移除描述符的监控void RemoveEvent(Channel *channel) { return _poller.RemoveEvent(channel); }void TimerAdd(uint64_t id, uint32_t delay, const TaskFunc &cb) { return _timer_wheel.TimerAdd(id, delay, cb); }void TimerRefresh(uint64_t id) { return _timer_wheel.TimerRefresh(id); }void TimerCancel(uint64_t id) { return _timer_wheel.TimerCancel(id); }bool HasTimer(uint64_t id) { return _timer_wheel.HasTimer(id); }
};class Any
{
private:class holder{public:virtual ~holder() {}virtual const std::type_info &type() = 0;virtual holder *clone() = 0;};template <class T>class placeholder : public holder{public:placeholder(const T &val) : _val(val) {}// 获取子类对象保存的数据类型virtual const std::type_info &type() { return typeid(T); }// 针对当前的对象自身，克隆出一个新的子类对象virtual holder *clone() { return new placeholder(_val); }// 析构用数据自身的就行了public:T _val;};holder *_content;public:Any() : _content(nullptr) {}template <class T>Any(const T &val) : _content(new placeholder<T>(val)) {}Any(const Any &other) : _content(other._content ? other._content->clone() : nullptr) {}~Any() { delete _content; }Any &swap(Any &other){std::swap(_content, other._content);return *this;}// 返回子类对象保存的数据的指针template <class T>T *get(){// 想要获取的数据类型，必须和保存的数据类型一致assert(typeid(T) == _content->type());return &((placeholder<T> *)_content)->_val;}// 赋值运算符的重载函数template <class T>Any &operator=(const T &val){// 为val构造一个临时的通用容器，然后与当前容器自身进行指针交换，临时对象释放的时候，原先保存的数据也就被释放了Any(val).swap(*this);return *this;}Any &operator=(const Any &other){Any(other).swap(*this);return *this;}
};class Connection;
// DISCONNECTED -- 连接关闭状态  CONNECTING -- 连接建立成功-待处理状态
// CONNECTED -- 连接建立完成,各种设置已完成,可以通信状态    DISCONNECTING -- 待关闭状态
typedef enum
{DISCONNECTED,CONNECTING,CONNECTED,DISCONNECTING
} ConnStatu;
using PtrConnection = std::shared_ptr<Connection>;
class Connection : public std::enable_shared_from_this<Connection>
{
private:uint64_t _conn_id; // 连接的唯一ID,便于连接的管理和查找// uint64_t _timer_id; // 定时器ID,必须是唯一的,这块是为了简化操作使用conn_id作为定时器int _sockfd;                   // 连接关联的文件描述符bool _enable_inactive_release; // 连接是否启动非活跃的判断标志,默认为falseEventLoop *_loop;              // 连接所关联的一个EventLoopConnStatu _statu;              // 连接状态Socket _socket;                // 套接字操作管理Channel _channel;              // 连接的事件管理Buffer _in_buffer;             // 输入缓冲区--存放从socket中读取到的数据Buffer _out_buffer;            // 输出缓冲区--存放要发送给对端的数据Any _context;                  // 请求的接收处理上下文/*这四个回调函数,是让服务器模块来设置的(其实服务器模块的处理回调也是组件使用者设置的)*//*换句话来说,这几个回调都是组件使用者使用的*/using ConnectedCallback = std::function<void(const PtrConnection &)>;using MessageCallback = std::function<void(const PtrConnection &, Buffer *)>;using ClosedCallback = std::function<void(const PtrConnection &)>;using AnyEventCallback = std::function<void(const PtrConnection &)>;ConnectedCallback _connected_callback;MessageCallback _message_callback;ClosedCallback _closed_callback;AnyEventCallback _event_callback;/*组件内的连接关闭回调--组件内设置的,因为服务器组件内会把所有的连接管理起来,一旦某个连接要关闭*//*就应该从管理的地方移除掉自己的信息*/ClosedCallback _server_closed_callback;private:/*五个channel的事件回调函数*/// 描述符可读事件触发后调用的函数,接收socket数据放到接收缓冲区中,然后调用_message_callbackvoid HandleRead(){// 1.接收socket的数据,放到缓冲区char buf[65536];ssize_t ret = _socket.NonBlockRecv(buf, 65536);if (ret < 0){// 出错了,不能直接关闭连接return ShutdownInLoop();}// 这里的等于0表示的是没有读取到数据,而并不是连接断开了,连接断开返回的是-1// 将数据放入输入缓冲区,写入之后顺便将写偏移向后移动_in_buffer.WriteAndPush(buf, ret);// 2.调用message_callback进行业务处理if (_in_buffer.ReadAbleSize() > 0){// shard_from_this--从当前对象自身获取自身的shared_ptr管理对象return _message_callback(shared_from_this(), &_in_buffer);}}// 描述符可写事件触发后调用的函数,将发送缓冲区中的数据进行发送void HandleWrite(){// _out_buffer中保存的就是要发送的数据ssize_t ret = _socket.NonBlockSend(_out_buffer.ReadPosition(), _out_buffer.ReadAbleSize());if (ret < 0){// 发送错误就应该关闭连接了if (_in_buffer.ReadAbleSize() > 0){_message_callback(shared_from_this(), &_in_buffer);}}_out_buffer.MoveReadOffset(ret); // 千万不要忘了,将读偏移向后移动if (_out_buffer.ReadAbleSize() == 0){_channel.DisableWrite(); // 没有数据待发送,关闭写事件监控// 如果当前是连接待关闭状态,则有数据,发送完数据释放连接,没有数据则直接释放if (_statu == DISCONNECTING){return ReleaseInLoop(); // 这时候就是实际的关闭释放操作了}}return;}// 描述符触发挂断事件void HandleClose(){/*一旦连接挂断了,套接字就什么都干不了了,因此有数据待处理就处理一下,完毕关闭连接*/if (_in_buffer.ReadAbleSize() > 0){_message_callback(shared_from_this(), &_in_buffer);}return ReleaseInLoop();}// 描述符触发出错事件void HandleError(){return HandleClose();}// 描述符触发任意事件: 1.刷新连接活跃度--延迟定时销毁任务 2.调用组件使用者的任意事件回调void HandleEvent(){if (_enable_inactive_release == true){_loop->TimerRefresh(_conn_id);}if (_event_callback){_event_callback(shared_from_this());}}// 连接获取之后,所处的状态要进行各种设置(给channel设置事件回调,启动读监控,调用回调函数)void EstablishedInLoop(){// 1.修改连接状态   2.启动读事件监控    3.调用回调函数assert(_statu == CONNECTING); // 当前状态必须一定是上层的半连接状态_statu = CONNECTED;           // 当前函数执行完毕,则连接进入已完成连接状态// 一旦启动读事件监控就有可能会立即触发读事件,如果这时候启动了非活跃连接销毁_channel.EnableRead();if (_connected_callback)_connected_callback(shared_from_this());}// 这个接口才是实际的释放接口void ReleaseInLoop(){// 1.修改连接状态,将其置为DISCONNECTED_statu = DISCONNECTED;// 2.移除连接的事件监控_channel.Remove();// 3.关闭描述符_socket.Close();// 4.如果当前定时器队列中还有定时销毁任务,则取消任务if (_loop->HasTimer(_conn_id))CancelInactiveReleaseInLoop();// 5.调用关闭回调函数,避免先移除服务器管理的连接信息导致Connection被释放,再去处理会出错,因此先调用用户的回调函数if (_closed_callback)_closed_callback(shared_from_this());// 移除服务器内部管理的连接信息if (_server_closed_callback)_server_closed_callback(shared_from_this());}// 这个并不是实际的发送接口,而只是把数据放到了发送缓冲区,启动了可写事件监控void SendInLoop(Buffer buf){if (_statu == DISCONNECTED)return;_out_buffer.WriteBufferAndPush(buf);    // 可以在这个函数后面加上const表示不修改thisif (_channel.WriteAble() == false){_channel.EnableWrite();}}// 这个关闭操作并非实际的连接释放操作,需要判断还有没有数据待处理,待发送void ShutdownInLoop(){_statu = DISCONNECTING; // 设置连接为半关闭状态if (_in_buffer.ReadAbleSize() > 0){if (_message_callback)_message_callback(shared_from_this(), &_in_buffer);}// 要么就是写入数据的时候出错关闭,要么就是没有待发送数据,直接关闭if (_out_buffer.ReadAbleSize() > 0){if (_channel.WriteAble() == false){_channel.EnableWrite();}}if (_out_buffer.ReadAbleSize() == 0){ReleaseInLoop();}}// 启动非活跃连接超时释放规则void EnableInactiveReleaseInLoop(int sec){// 1.将判断标志 _enable_inactive_release 置为true_enable_inactive_release = true;// 2.如果当前定时销毁任务已经存在,那就刷新一下延迟即可if (_loop->HasTimer(_conn_id)){return _loop->TimerRefresh(_conn_id);}// 3.如果不存在定时销毁任务,则新增_loop->TimerAdd(_conn_id, sec, std::bind(&Connection::ReleaseInLoop, this));}void CancelInactiveReleaseInLoop(){_enable_inactive_release = false;if (_loop->HasTimer(_conn_id)){_loop->TimerCancel(_conn_id);}}void UpgradeInLoop(const Any &context,const ConnectedCallback &conn,const MessageCallback &msg,const ClosedCallback &closed,const AnyEventCallback &event){_context = context;_connected_callback = conn;_message_callback = msg;_closed_callback = closed;_event_callback = event;}public:Connection(EventLoop *loop, uint64_t conn_id, int sockfd) : _conn_id(conn_id), _sockfd(sockfd),_enable_inactive_release(false), _loop(loop), _statu(CONNECTING), _socket(_sockfd),_channel(loop, _sockfd){_channel.SetCloseCallback(std::bind(&Connection::HandleClose, this));_channel.SetEventCallback(std::bind(&Connection::HandleEvent, this));_channel.SetReadCallback(std::bind(&Connection::HandleRead, this));_channel.SetWriteCallback(std::bind(&Connection::HandleWrite, this));_channel.SetErrorCallback(std::bind(&Connection::HandleError, this));}~Connection() { DBG_LOG("RELEASE CONNECTION:%p", this); }// 获取管理的文件描述符int Fd() { return _sockfd; }// 获取连接IDint Id() { return _conn_id; }// 是否处于CONNECTED状态bool Connected() { return (_statu == CONNECTED); }// 设置上下文--连接建立完成时进行调用void SetContext(const Any &context) { _context = context; }// 获取上下文,返回的是指针Any *GetContext() { return &_context; }void SetConnectedCallback(const ConnectedCallback &cb) { _connected_callback = cb; }void SetMessageCallback(const MessageCallback &cb) { _message_callback = cb; }void SetClosedCallback(const ClosedCallback &cb) { _closed_callback = cb; }void SetAnyEventCallback(const AnyEventCallback &cb) { _event_callback = cb; }void SetSrvClosedCallback(const ClosedCallback &cb) { _server_closed_callback = cb; }// 连接建立就绪后,进行channel回调设置,启动读监控,调用_connect_callbackvoid Established(){_loop->RunInLoop(std::bind(&Connection::EstablishedInLoop, this));}// 发送数据,将数据发送到发送缓冲区,启动写事件监控void Send(const char *data, size_t len){// 外界传入的data,可能是个临时空间,我们现在只是把发送操作压入了任务池,有可能并没有被执行// 因此有可能执行的时候,data指向的空间有可能已经被释放了Buffer buf;buf.WriteAndPush(data, len);_loop->RunInLoop(std::bind(&Connection::SendInLoop, this, buf));}// 提供给组件使用者的关闭接口--并不实际关闭,需要判断有没有数据待处理void Shutdown(){_loop->RunInLoop(std::bind(&Connection::ShutdownInLoop, this));}// 启动非活跃销毁,并定义多长时间无通信就是非活跃,添加定时任务void EnableInactiveRelease(int sec){_loop->RunInLoop(std::bind(&Connection::EnableInactiveReleaseInLoop, this, sec));}// 取消非活跃销毁void CancelInactiveRelease(){_loop->RunInLoop(std::bind(&Connection::CancelInactiveReleaseInLoop, this));}// 切换协议--重置上下文以及阶段性处理函数--而是这个接口必须在EventLoop线程中立即执行// 防备新的事件触发后,处理的时候,切换任务还没有被执行--会导致数据使用原协议处理了void Upgrade(const Any &context, const ConnectedCallback &conn, const MessageCallback &msg,const ClosedCallback &closed, const AnyEventCallback &event){_loop->AssertInLoop();_loop->RunInLoop(std::bind(&Connection::UpgradeInLoop, this, context, conn, msg, closed, event));}
};// 移除监控
void Channel::Remove() { return _loop->RemoveEvent(this); }
void Channel::Update() { return _loop->UpdateEvent(this); }
void TimerWheel::TimerAdd(uint64_t id, uint32_t delay, const TaskFunc &cb)
{_loop->RunInLoop(std::bind(&TimerWheel::TimerAddInLoop, this, id, delay, cb));
}
void TimerWheel::TimerRefresh(uint64_t id)
{_loop->RunInLoop(std::bind(&TimerWheel::TimerRefreshInLoop, this, id));
}
void TimerWheel::TimerCancel(uint64_t id)
{_loop->RunInLoop(std::bind(&TimerWheel::TimerCancelInLoop, this, id));
}