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tc_epoller.h
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tc_epoller.h
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/**
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* Tencent is pleased to support the open source community by making Tars available.
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*
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* Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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#ifndef __TC_EPOLLER_H_
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#define __TC_EPOLLER_H_
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#include "util/tc_platform.h"
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#include "util/tc_socket.h"
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#include <cassert>
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#if TARGET_PLATFORM_IOS
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#include "sys/event.h"
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const int EPOLLIN = 0x0001;
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const int EPOLLOUT = 0x0002;
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const int EPOLLERR = 0x0004;
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typedef kevent64_s epoll_event;
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#else
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#include "sys/epoll.h"
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#endif
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namespace tars
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{
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/////////////////////////////////////////////////
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/**
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* @file tc_epoller.h
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* @brief epoll操作封装类
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* @brief Epoll operation encapsulation class
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*/
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/////////////////////////////////////////////////
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/**
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* @brief epoll异常类
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* @brief epoll exception class
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*/
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struct TC_Epoller_Exception : public TC_Exception
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{
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TC_Epoller_Exception(const string &buffer, int err) : TC_Exception(buffer, err) {};
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~TC_Epoller_Exception() {};
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};
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/**
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* @brief epoller操作类，已经默认采用了EPOLLET方式做触发
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* @brief epoller operation class, EPOLLET has been used by default for triggering
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*/
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class TC_Epoller
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{
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public:
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/**
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* @brief 通知epoll从wait中醒过来
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* @brief Notice epoll to wake up from 'wait'
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*/
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class NotifyInfo
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{
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public:
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NotifyInfo();
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~NotifyInfo();
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/**
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* 初始化
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* Initialization
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*/
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void init(TC_Epoller *ep);
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/**
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* 添加关联数据
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* Add corresponding data
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*/
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void add(uint64_t data);
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/**
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* 通知notify醒过来
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* Notice notify to wake up
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*/
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void notify();
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/**
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* 释放掉
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* Diposit
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*/
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void release();
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/**
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* 获取通知fd
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* Get notifyFd
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*/
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int notifyFd();
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/**
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* 清除通知, 否则会一直响应
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* Clear up notice, otherwise, it will always respond
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*/
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// void clear();
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protected:
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//通知fd
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TC_Socket _notify;
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TC_Socket _notifyClient;
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// bool _clear = true;
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TC_Epoller *_ep;
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/*Events associated with the notification handle*/
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uint64_t _data; //关联到通知句柄的事件
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};
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/**
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* @brief 构造函数.
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* @brief Constructor Function
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*
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* @param bEt 默认是ET模式，当状态发生变化的时候才获得通知
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* @param bEt The default is et mode, which is notified when the status changes
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*/
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TC_Epoller();
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/**
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* @brief 析够函数.
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* @brief Destructor
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*/
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~TC_Epoller();
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/**
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* @brief 生成epoll句柄.
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* @brief Generate epoll handle.
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*
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* @param max_connections epoll服务需要支持的最大连接数
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* @param max_connections Maximum number of connections the epoll service needs to support
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*/
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void create(int max_connections);
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/**
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* @brief 释放资源
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*
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* @param
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*/
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void close();
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/**
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* @brief 添加监听句柄.
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* @brief Add listening handle.
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*
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* @param fd 句柄
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* @param fd handle
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* @param data 辅助的数据, 可以后续在epoll_event中获取到
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* @param data auxiliary data that can be obtained in epoll_event subsequently
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* @param event 需要监听的事件EPOLLIN|EPOLLOUT
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* @param event Events to be listened on EPOLLIN|EPOLLOUT
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*
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*/
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void add(SOCKET_TYPE fd, uint64_t data, int32_t event);
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/**
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* @brief 修改句柄事件.
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* @brief Modify handle event
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*
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* @param fd 句柄
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* @param fd handle
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* @param data 辅助的数据, 可以后续在epoll_event中获取到
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* @param data auxiliary data that can be obtained in epoll_event subsequently
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* @param event 需要监听的事件EPOLLIN|EPOLLOUT
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* @param event Events to be listened on EPOLLIN|EPOLLOUT
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*/
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void mod(SOCKET_TYPE fd, uint64_t data, int32_t event);
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/**
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* @brief 删除句柄事件.
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* @brief Delete handle event.
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*
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* @param fd 句柄
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* @param fd handle
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* @param data 辅助的数据, 可以后续在epoll_event中获取到
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* @param data auxiliary data that can be obtained in epoll_event subsequently
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* @param event 需要监听的事件EPOLLIN|EPOLLOUT
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* @param event Events to be listened on EPOLLIN|EPOLLOUT
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*/
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void del(SOCKET_TYPE fd, uint64_t data, int32_t event);
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/**
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* @brief 等待时间.
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* @brief wait time
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*
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* @param millsecond 毫秒
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* @return int 有事件触发的句柄数
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* @return int Number of handles triggered by events
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*/
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int wait(int millsecond);
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/**
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* @brief 获取被触发的事件.
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* @brief Get the triggered handle
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*
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* @return struct epoll_event&被触发的事件
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* @return Struct epoll_event& triggered event
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*/
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epoll_event& get(int i);// { assert(_pevs != 0); return _pevs[i]; }
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/**
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* @brief 是否有读事件
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* @brief whether it have event to read
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*
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* @return
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*/
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static bool readEvent(const epoll_event &ev);
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/**
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* @brief 是否有写事件
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* @brief whether it have event to write
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*
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* @return
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*/
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static bool writeEvent(const epoll_event &ev);
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/**
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* @brief 是否有异常事件
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* @brief whether it have eception event
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*
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* @return
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*/
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static bool errorEvent(const epoll_event &ev);
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/**
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* @brief 获取低位/高位数据
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* @brief Get low/high bit data
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* @param high: true:高位, false:低位
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* @param high: true:high level, false:low level
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* @return
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*/
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static uint32_t getU32(const epoll_event &ev, bool high);
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/**
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* @brief 获取64bit数据
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* @brief Get 64 bit data
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* @return
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*/
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static uint64_t getU64(const epoll_event &ev);
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protected:
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/**
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* @brief 控制epoll，将EPOLL设为边缘触发EPOLLET模式
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* @brief Control epoll, set EPOLL to Edge Trigger EPOLLET mode
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* @param fd 句柄，在create函数时被赋值
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* @param fd Handle, assigned when creating function
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* @param data 辅助的数据, 可以后续在epoll_event中获取到
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* @param data auxiliary data that can be obtained in epoll_event subsequently
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* @param event 需要监听的事件
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* @param event the event to be listened
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* @param op EPOLL_CTL_ADD： 注册新的fd到epfd中；
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* EPOLL_CTL_MOD：修改已经注册的fd的监听事件；
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* EPOLL_CTL_DEL：从epfd中删除一个fd；
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* @param op EPOLL_CTL_ADD：Register new FD into EPFD
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* EPOLL_CTL_MOD：Modify the monitoring events for registered fd
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* EPOLL_CTL_DEL：Delete an FD from epfd
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*
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*/
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void ctrl(SOCKET_TYPE fd, uint64_t data, uint32_t events, int op);
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protected:
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/**
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* epoll
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*/
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#if TARGET_PLATFORM_WINDOWS
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void* _iEpollfd;
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#else
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int _iEpollfd;
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#endif
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/**
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* 最大连接数
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* The max amount of connections
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*/
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int _max_connections;
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/**
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* 事件集
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* Event Set
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*/
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epoll_event *_pevs;
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};
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}
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#endif
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