{"id":44126,"date":"2025-06-17T07:40:45","date_gmt":"2025-06-16T23:40:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/44126.html"},"modified":"2025-06-17T07:40:45","modified_gmt":"2025-06-16T23:40:45","slug":"%e3%80%90%e9%a1%b9%e7%9b%ae%e3%80%91%e4%bb%bfmuduo%e5%ba%93one-thread-one-loop%e5%bc%8f%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%89%8d%e7%bd%ae%e7%9f%a5%e8%af%86%e5%87%86%e5%a4%87","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/44126.html","title":{"rendered":"\u3010\u9879\u76ee\u3011\u4effmuduo\u5e93one thread one loop\u5f0f\u5e76\u53d1\u670d\u52a1\u5668\u524d\u7f6e\u77e5\u8bc6\u51c6\u5907"},"content":{"rendered":"

\u00a0\u00a0📚\u00a0\u535a\u4e3b\u7684\u4e13\u680f<\/span><\/p>\n

🐧\u00a0Linux\u00a0\u00a0\u00a0|\u00a0\u00a0 🖥\ufe0f\u00a0C++\u00a0\u00a0\u00a0|\u00a0\u00a0 📊\u00a0\u6570\u636e\u7ed3\u6784\u00a0\u00a0|\u00a0💡C++ \u7b97\u6cd5\u00a0|\u00a0🅒\u00a0C \u8bed\u8a00\u00a0 |\u00a0🌐\u00a0\u8ba1\u7b97\u673a\u7f51\u7edc\u00a0|🗃\ufe0f\u00a0mysql<\/p>\n

\u672c\u6587\u4ecb\u7ecd\u4e86\u4e00\u79cd\u57fa\u4e8emuduo\u5e93\u5b9e\u73b0\u7684\u4e3b\u4eceReactor\u6a21\u578b\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u6846\u67b6\u4ee5\u53ca\u524d\u7f6e\u77e5\u8bc6\u51c6\u5907\u3002\u6846\u67b6\u91c7\u7528OneThreadOneLoop\u8bbe\u8ba1\u601d\u60f3，\u4e3bReactor\u8d1f\u8d23\u76d1\u542c\u8fde\u63a5，\u5b50Reactor\u5904\u7406\u901a\u4fe1，\u5b9e\u73b0\u9ad8\u6548\u5e76\u53d1\u3002\u524d\u7f6e\u77e5\u8bc6\u5305\u62ec：1. \u4f7f\u7528timerfd_create\u548ctimerfd_settime\u5b9e\u73b0\u79d2\u7ea7\u5b9a\u65f6\u4efb\u52a1；2. \u8bbe\u8ba1\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7ba1\u7406\u8fde\u63a5\u8d85\u65f6；3. \u5e94\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u89e3\u6790HTTP\u8bf7\u6c42；4. \u5b9e\u73b0\u901a\u7528any\u7c7b\u578b\u5bb9\u5668\u5b58\u50a8\u4e0d\u540c\u534f\u8bae\u4e0a\u4e0b\u6587\u3002\u6d4b\u8bd5\u8868\u660e，\u8be5\u6846\u67b6\u53ef\u6709\u6548\u652f\u6301\u9ad8\u5e76\u53d1\u573a\u666f，\u5e76\u63d0\u4f9b\u4e86\u7075\u6d3b\u7684\u4e1a\u52a1\u903b\u8f91\u6269\u5c55\u63a5\u53e3\u3002<\/span><\/p>\n

\u76ee\u5f55<\/p>\n

\u4e00\u3001\u9879\u76ee\u521d\u4e86\u89e3<\/p>\n

1.1 \u76ee\u6807\u5b9a\u4f4d：One Thread One Loop\u4e3b\u4eceReactor\u6a21\u578b\u9ad8\u5e76\u53d1\u670d\u52a1\u5668<\/p>\n

1.2 \u6a21\u5757\u5173\u7cfb\u56fe：<\/p>\n

\u4e8c\u3001\u524d\u7f6e\u77e5\u8bc6\u6280\u672f\u70b9\u529f\u80fd\u7528\u4f8b：<\/p>\n

2.1 C++11\u4e2d\u7684bind：\u8fd9\u7bc7\u6587\u7ae0\u6709\u8be6\u7ec6\u7684\u8bb2\u89e3<\/p>\n

2.2 \u9ad8\u6548\u5b9e\u73b0\u79d2\u7ea7\u5b9a\u65f6\u4efb\u52a1：<\/p>\n

2.2.1 Linux\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u5b9a\u65f6\u5668\u89e3\u51b3\u65b9\u6848：<\/p>\n

\u793a\u4f8b：<\/p>\n

2.2.2\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u57fa\u672c\u601d\u60f3\u7406\u89e3\u4ee5\u53ca\u8bbe\u8ba1\u5b8c\u5584<\/p>\n

\u65f6\u95f4\u8f6e<\/p>\n

shared_ptr\u6765\u7ba1\u7406\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61<\/p>\n

2.2.3\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u8bbe\u8ba1<\/p>\n

***\u667a\u80fd\u6307\u9488\u7684\u4f7f\u7528***<\/p>\n

2.2.4\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u5b9e\u73b0<\/p>\n

2.2.5\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u6d4b\u8bd5<\/p>\n

2.3 \u6b63\u5219\u5e93\u7684\u7b80\u5355\u4f7f\u7528<\/p>\n

2.3.1 \u6b63\u5219\u8868\u8fbe\u5f0f\u57fa\u672c\u8ba4\u8bc6<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u51fd\u6570<\/p>\n

2.3.2 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u8bf7\u6c42\u65b9\u6cd5<\/p>\n

2.3.3 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u8bf7\u6c42\u8def\u5f84<\/p>\n

2.3.4 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u67e5\u8be2\u5b57\u7b26\u4e32<\/p>\n

2.3.5 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u534f\u8bae\u7248\u672c<\/p>\n

2.3.6 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u5143\u7d20\u7ec6\u8282\u5b8c\u5584<\/p>\n

\u60c5\u51b51：\u6240\u7ed9\u5b57\u7b26\u4e32\u540e\u8fb9\u8ddf\u4e86\\\\r\\\\n，\u7528\u4ee5\u4e0a\u7684e，\u65e0\u6cd5\u63d0\u53d6\u51fa\u5b57\u7b26\u4e32<\/p>\n

\u60c5\u51b52：\u6240\u7ed9\u5b57\u7b26\u4e32\u6839\u672c\u6ca1\u6709\u67e5\u8be2\u5b57\u7b26\u4e32?user=pupu&passwd=12312<\/p>\n

2.4 \u5b9e\u73b0\u901a\u7528\u7684any\u7c7b\u578b：<\/p>\n

2.4.1\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u8bbe\u8ba1\u601d\u60f3<\/p>\n

2.4.2\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u7ed3\u6784\u8bbe\u8ba1<\/p>\n

2.4.3\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u529f\u80fd\u5b9e\u73b0<\/p>\n

2.4.4 \u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u529f\u80fd\u6d4b\u8bd5<\/p>\n

2.4.5 \u901a\u7528\u7c7b\u578b\u5bb9\u5668C++17\u4e2dany\u7684\u4f7f\u7528<\/p>\n

\n

\u4e00\u3001\u9879\u76ee\u521d\u4e86\u89e3<\/span><\/h2>\n

\u57fa\u4e8emuduo\u5e93\u7684One Thread One Loop\u4e3b\u4eceReactor\u6a21\u578b\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u5b9e\u73b0：<\/span><\/p>\n<\/p>\n

\u6211\u4eec\u5b9e\u73b0\u7684\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u7ec4\u4ef6\u80fd\u591f\u5feb\u901f\u642d\u5efa\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u67b6\u6784\u3002\u8be5\u7ec4\u4ef6\u63d0\u4f9b\u591a\u79cd\u5e94\u7528\u5c42\u534f\u8bae\u652f\u6301，\u53ef\u4fbf\u6377\u6784\u5efa\u9ad8\u6027\u80fd\u5e94\u7528\u670d\u52a1\u5668（\u9879\u76ee\u6f14\u793a\u4e2d\u5df2\u5185\u7f6eHTTP\u534f\u8bae\u7ec4\u4ef6\u652f\u6301）\u3002<\/span><\/p>\n<\/p>\n

\u9700\u8981\u8bf4\u660e\u7684\u662f，\u672c\u9879\u76ee\u5b9a\u4f4d\u4e3a\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u7ec4\u4ef6\u6846\u67b6，\u56e0\u6b64\u4e0d\u5305\u542b\u5177\u4f53\u4e1a\u52a1\u903b\u8f91\u5b9e\u73b0\u3002<\/span><\/p>\n

1.1 \u76ee\u6807\u5b9a\u4f4d：One Thread One Loop\u4e3b\u4eceReactor\u6a21\u578b\u9ad8\u5e76\u53d1\u670d\u52a1\u5668<\/span><\/h3>\n

\u6211\u4eec\u5c06\u91c7\u7528\u4e3b\u4eceReactor\u6a21\u578b\u6784\u5efa\u670d\u52a1\u5668，\u5176\u4e2d\u4e3bReactor\u7ebf\u7a0b\u4e13\u95e8\u8d1f\u8d23\u76d1\u542c\u8fde\u63a5\u8bf7\u6c42，\u786e\u4fdd\u9ad8\u6548\u5904\u7406\u65b0\u8fde\u63a5，\u4ece\u800c\u63d0\u5347\u670d\u52a1\u5668\u5e76\u53d1\u6027\u80fd\u3002<\/span><\/p>\n<\/p>\n

\u5f53\u4e3bReactor\u83b7\u5f97\u65b0\u8fde\u63a5\u540e，\u4f1a\u5c06\u5176\u5206\u914d\u7ed9\u5b50Reactor\u8fdb\u884c\u901a\u4fe1\u3002\u5404\u5b50Reactor\u7ebf\u7a0b\u72ec\u7acb\u76d1\u63a7\u5176\u8d1f\u8d23\u7684\u63cf\u8ff0\u7b26，\u5904\u7406\u8bfb\u5199\u4e8b\u4ef6\u5e76\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u53ca\u4e1a\u52a1\u903b\u8f91\u5904\u7406\u3002<\/span><\/p>\n<\/p>\n

One Thread One Loop\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5c06\u6240\u6709\u64cd\u4f5c\u96c6\u4e2d\u5728\u4e00\u4e2a\u7ebf\u7a0b\u5185\u5b8c\u6210，\u6bcf\u4e2a\u7ebf\u7a0b\u5bf9\u5e94\u4e00\u4e2a\u72ec\u7acb\u7684\u4e8b\u4ef6\u5904\u7406\u5faa\u73af\u3002<\/span><\/p>\n<\/p>\n

\u5f53\u524d\u5b9e\u73b0\u8003\u8651\u5230\u7ec4\u4ef6\u4f7f\u7528\u8005\u7684\u591a\u6837\u5316\u9700\u6c42，\u9ed8\u8ba4\u4ec5\u63d0\u4f9b\u4e3b\u4eceReactor\u6a21\u578b，\u800c\u4e0d\u5185\u7f6e\u4e1a\u52a1\u5c42\u5de5\u4f5c\u7ebf\u7a0b\u6c60\u3002Worker\u7ebf\u7a0b\u6c60\u7684\u5b9e\u73b0\u4e0e\u5426，\u5b8c\u5168\u7531\u7ec4\u4ef6\u4f7f\u7528\u8005\u6839\u636e\u5b9e\u9645\u9700\u6c42\u81ea\u884c\u51b3\u5b9a\u3002<\/span><\/p>\n

1.2 \u6a21\u5757\u5173\u7cfb\u56fe：<\/span><\/h3>\n

\"\"\u200b<\/p>\n

\u4e8c\u3001\u524d\u7f6e\u77e5\u8bc6\u6280\u672f\u70b9\u529f\u80fd\u7528\u4f8b：<\/span><\/h2>\n

2.1 C++11\u4e2d\u7684bind：\u8fd9\u7bc7\u6587\u7ae0\u6709\u8be6\u7ec6\u7684\u8bb2\u89e3<\/span><\/h3>\n

bind (Fn&& fn, Args&&… args); <\/p>\n

\u89c1\u89c1\u4f7f\u7528：<\/span><\/p>\n

#include <iostream>
\n#include <string>
\n#include <functional><\/p>\n

void print(const std::string &str, int num)
\n{
\n std::cout << str << num << std::endl;
\n}<\/p>\n

int main()
\n{
\n auto func = std::bind(print, "hello", std::placeholders::_1);
\n func(10);
\n return 0;
\n} <\/p>\n

\u5229\u7528bind\u7684\u7279\u6027，\u5728\u8bbe\u8ba1\u7ebf\u7a0b\u6c60\u6216\u4efb\u52a1\u6c60\u65f6，\u53ef\u4ee5\u5c06\u4efb\u52a1\u8bbe\u7f6e\u4e3a\u51fd\u6570\u7c7b\u578b\u3002\u901a\u8fc7bind\u76f4\u63a5\u7ed1\u5b9a\u4efb\u52a1\u51fd\u6570\u7684\u53c2\u6570，\u4efb\u52a1\u6c60\u53ea\u9700\u53d6\u51fa\u5e76\u6267\u884c\u8fd9\u4e9b\u9884\u7ed1\u5b9a\u597d\u7684\u51fd\u6570\u5373\u53ef\u3002<\/span><\/p>\n<\/p>\n

\u8fd9\u79cd\u8bbe\u8ba1\u7684\u4f18\u52bf\u5728\u4e8e：\u4efb\u52a1\u6c60\u4e0d\u9700\u8981\u5173\u5fc3\u5177\u4f53\u4efb\u52a1\u7684\u5904\u7406\u65b9\u5f0f\u3001\u51fd\u6570\u8bbe\u8ba1\u6216\u53c2\u6570\u6570\u91cf，\u6709\u6548\u964d\u4f4e\u4e86\u4ee3\u7801\u4e4b\u95f4\u7684\u8026\u5408\u5ea6\u3002<\/span><\/p>\n

#include <iostream>
\n#include <string>
\n#include <functional>
\n#include <vector>
\nvoid print(const std::string &str, int num)
\n{
\n std::cout << str << num << std::endl;
\n}<\/p>\n

int main()
\n{
\n using Task = std::function<void()>;
\n std::vector<Task> array;
\n array.push_back(std::bind(print, "hello", 10));
\n array.push_back(std::bind(print, "linux", 20));
\n array.push_back(std::bind(print, "c++", 30));
\n array.push_back(std::bind(print, "pupu", 40));
\n for (auto &f : array)
\n {
\n f();
\n }
\n return 0;
\n} <\/p>\n

2.2 \u9ad8\u6548\u5b9e\u73b0\u79d2\u7ea7\u5b9a\u65f6\u4efb\u52a1：<\/span><\/h3>\n

\u5728\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u73af\u5883\u4e2d，\u8fde\u63a5\u8d85\u65f6\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u957f\u65f6\u95f4\u95f2\u7f6e\u7684\u8fde\u63a5\u4f1a\u6301\u7eed\u5360\u7528\u7cfb\u7edf\u8d44\u6e90，\u56e0\u6b64\u9700\u8981\u53ca\u65f6\u5173\u95ed\u8fd9\u4e9b\u65e0\u6548\u8fde\u63a5\u3002<\/span><\/p>\n

\u4e3a\u6b64，\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u7cbe\u51c6\u7684\u5b9a\u65f6\u4efb\u52a1\u673a\u5236，\u5b9a\u671f\u6e05\u7406\u8d85\u65f6\u8fde\u63a5\u3002<\/span><\/p>\n

2.2.1 Linux\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u5b9a\u65f6\u5668\u89e3\u51b3\u65b9\u6848：<\/span><\/h4>\n

timerfd_create-\u521b\u5efa\u5b9a\u65f6\u5668<\/span><\/p>\n

\u529f\u80fd：\u521b\u5efa\u4e00\u4e2a\u5b9a\u65f6\u5668<\/span><\/p>\n

#include <sys\/timerfd.h><\/p>\n

int timerfd_create(int clockid, int flags);<\/p>\n

\/*
\n * \u53c2\u6570\u8bf4\u660e：
\n * clockid:
\n * – CLOCK_REALTIME \u7cfb\u7edf\u5b9e\u65f6\u65f6\u95f4（\u7cfb\u7edf\u65f6\u95f4\u53d1\u751f\u4e86\u6539\u53d8\u5c31\u4f1a\u51fa\u95ee\u9898）
\n * – CLOCK_MONOTONIC \u7cfb\u7edf\u542f\u52a8\u540e\u7684\u5355\u8c03\u65f6\u95f4（\u76f8\u5bf9\u65f6\u95f4，\u5b9a\u65f6\u4e0d\u4f1a\u968f\u7740\u7cfb\u7edf\u65f6\u95f4\u7684\u6539\u53d8\u800c\u6539\u53d8）
\n *
\n * flags:
\n * – 0 \u9ed8\u8ba4\u963b\u585e\u6a21\u5f0f
\n *\/
\n\u8fd4\u56de\u503c：\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n

Linux\u4e0b\u201c\u4e00\u5207\u7686\u6587\u4ef6\u201d，\u5b9a\u65f6\u5668\u7684\u64cd\u4f5c\u4e5f\u662f\u8ddf\u6587\u4ef6\u64cd\u4f5c\u5e76\u6ca1\u6709\u4ec0\u4e48\u533a\u522b，\u800c\u5b9a\u65f6\u5668\u7684\u539f\u7406\u5c31\u662f：<\/span><\/p>\n

\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4（\u5b9a\u65f6\u5668\u7684\u8d85\u65f6\u65f6\u95f4），\u7cfb\u7edf\u5c31\u4f1a\u7ed9\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u5bf9\u5e94\u7684\u5b9a\u65f6\u5668\u5199\u5165\u4e00\u4e2a8\u5b57\u8282\u7684\u6570\u636e<\/span><\/p>\n

\u521b\u5efa\u4e86\u4e00\u4e2a\u5b9a\u65f6\u5668，\u5b9a\u65f6\u5668\u5b9a\u7acb\u7684\u8d85\u65f6\u65f6\u95f4\u662f3s，\u4e5f\u5c31\u662f\u8bf4\u6bcf3s\u7b97\u4e00\u6b21\u8d85\u65f6<\/span><\/p>\n

\u4ece\u542f\u52a8\u5f00\u59cb，\u6bcf\u96943s\u4e2d，\u7cfb\u7edf\u5c31\u4f1a\u7ed9fd\u5199\u5165\u4e00\u4e2a1，\u8868\u793a\u4ece\u4e0a\u4e00\u6b21\u8bfb\u53d6\u6570\u636e\u5230\u73b0\u5728\u8d85\u65f6\u4e861\u6b21<\/span><\/p>\n

\u5047\u8bbe30s\u4e4b\u540e\u624d\u8bfb\u53d6\u6570\u636e，\u5219\u8fd9\u65f6\u5019\u5c31\u4f1a\u8bfb\u53d6\u5230\u4e00\u4e2a10，\u8868\u793a\u4e0a\u4e00\u6b21\u8bfb\u53d6\u6570\u636e\u5230\u9650\u5236\u8d85\u65f6\u4e8610\u6b21<\/span><\/p>\n

timerfd_settime-\u542f\u52a8\u5b9a\u65f6\u5668<\/span><\/p>\n

\u529f\u80fd：\u542f\u52a8\u5b9a\u65f6\u5668<\/span><\/p>\n

int timerfd_settime(int fd, int flags, struct itimerspec *new, struct
\nitimerspec *old); <\/p>\n

fd: timerfd_create\u8fd4\u56de\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 flags: 0-\u76f8\u5bf9\u65f6\u95f4， 1-\u7edd\u5bf9\u65f6\u95f4；\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a0\u5373\u53ef. new： \u7528\u4e8e\u8bbe\u7f6e\u5b9a\u65f6\u5668\u7684\u65b0\u8d85\u65f6\u65f6\u95f4 old： \u7528\u4e8e\u63a5\u6536\u5f53\u524d\u5b9a\u65f6\u5668\u539f\u6709\u7684\u8d85\u65f6\u65f6\u95f4<\/span> \u00a0<\/p>\n

struct timespec
\n{
\n\u00a0 \u00a0 time_t tv_sec; \/* Seconds *\/
\n\u00a0 \u00a0 long tv_nsec; \u00a0\/* Nanoseconds *\/
\n};
\nstruct itimerspec
\n{
\n\u00a0 \u00a0 struct timespec it_interval; \/* \u7b2c\u2f00\u6b21\u4e4b\u540e\u7684\u8d85\u65f6\u95f4\u9694\u65f6\u95f4 *\/
\n\u00a0 \u00a0 struct timespec it_value; \u00a0 \u00a0\/* \u7b2c\u2f00\u6b21\u8d85\u65f6\u65f6\u95f4 *\/
\n}; <\/p>\n

\u5b9a\u65f6\u5668\u6bcf\u6b21\u8d85\u65f6\u65f6，\u4f1a\u81ea\u52a8\u5411\u6587\u4ef6\u63cf\u8ff0\u7b26(fd)\u5199\u51658\u5b57\u8282\u6570\u636e，\u8be5\u6570\u636e\u8868\u793a\u4ece\u4e0a\u6b21\u8bfb\u53d6\u64cd\u4f5c\u5230\u5f53\u524d\u8bfb\u53d6\u64cd\u4f5c\u4e4b\u95f4\u53d1\u751f\u7684\u8d85\u65f6\u6b21\u6570\u3002<\/span><\/p>\n

\u793a\u4f8b：<\/span> <\/h5>\n

#include <stdio.h>
\n#include <unistd.h>
\n#include <fcntl.h>
\n#include <sys\/timerfd.h>
\n#include <cstdint><\/p>\n

int main()
\n{
\n \/\/ \u521b\u5efa\u4e00\u4e2a\u5b9a\u65f6\u5668
\n int timerfd = timerfd_create(CLOCK_MONOTONIC, 0);
\n if (timerfd < 0)
\n {
\n perror("timerfd_create failed\\\\n");
\n return -1;
\n }<\/p>\n

struct itimerspec itime;
\n \/\/ \u8bbe\u7f6e\u7b2c\u4e00\u6b21\u8d85\u65f6\u65f6\u95f4\u4e3a3s\u540e
\n itime.it_value.tv_sec = 3;
\n itime.it_value.tv_nsec = 0;
\n \/\/ \u7b2c\u4e00\u6b21\u8d85\u65f6\u540e，\u6bcf\u6b21\u8d85\u65f6\u7684\u95f4\u9694\u65f6\u95f4
\n itime.it_interval.tv_sec = 3;
\n itime.it_interval.tv_nsec = 0;
\n timerfd_settime(timerfd, 0, &itime, NULL);<\/p>\n

while (1)
\n {
\n uint64_t times;
\n int ret = read(timerfd, &times, 8);
\n if (ret < 0)
\n {
\n perror("read error\\\\n");
\n return -1;
\n }
\n printf("\u8d85\u65f6\u4e86，\u8ddd\u79bb\u4e0a\u4e00\u6b21\u8d85\u65f6\u4e86%ld\u6b21\\\\n", times);
\n }
\n close(timerfd);
\n return 0;
\n} <\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u5b9a\u65f6\u5668\u4f7f\u7528\u7684\u793a\u4f8b，\u6bcf3\u79d2\u4f1a\u89e6\u53d1\u4e00\u6b21\u8d85\u65f6\u4e8b\u4ef6，\u5426\u5219\u7a0b\u5e8f\u4f1a\u963b\u585e\u5728read\u6570\u636e\u8bfb\u53d6\u64cd\u4f5c\u4e0a\u3002\u57fa\u4e8e\u6b64\u4f8b，\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u6bcf3\u79d2\u68c0\u6d4b\u4e00\u6b21\u8d85\u65f6\u8fde\u63a5，\u5e76\u5c06\u8d85\u65f6\u7684\u8fde\u63a5\u91ca\u653e\u3002<\/span><\/h5>\n

2.2.2\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u57fa\u672c\u601d\u60f3\u7406\u89e3\u4ee5\u53ca\u8bbe\u8ba1\u5b8c\u5584<\/span><\/h4>\n
\u65f6\u95f4\u8f6e<\/span><\/h5>\n

\u8fd9\u4e2a\u793a\u4f8b\u5b58\u5728\u4e00\u4e2a\u660e\u663e\u95ee\u9898：\u6bcf\u6b21\u8d85\u65f6\u90fd\u9700\u8981\u904d\u5386\u6240\u6709\u8fde\u63a5，\u5f53\u8fde\u63a5\u6570\u91cf\u8fbe\u5230\u4e0a\u4e07\u65f6，\u6548\u7387\u4f1a\u975e\u5e38\u4f4e\u4e0b\u3002<\/span><\/p>\n

\u4e3a\u6b64，\u6211\u4eec\u53ef\u4ee5\u6539\u8fdb\u65b9\u6848：\u6839\u636e\u6bcf\u4e2a\u8fde\u63a5\u6700\u540e\u4e00\u6b21\u901a\u4fe1\u7684\u7cfb\u7edf\u65f6\u95f4\u5efa\u7acb\u5c0f\u6839\u5806\u3002\u8fd9\u6837\u53ea\u9700\u68c0\u67e5\u5806\u9876\u7684\u8fde\u63a5，\u9010\u4e2a\u91ca\u653e\u8d85\u65f6\u7684\u8fde\u63a5\u5373\u53ef，\u8fd9\u5c06\u663e\u8457\u63d0\u5347\u5904\u7406\u6548\u7387\u3002<\/span><\/p>\n<\/p>\n

\u867d\u7136\u4e0a\u8ff0\u65b9\u6cd5\u80fd\u5b9e\u73b0\u5b9a\u65f6\u4efb\u52a1，\u4f46\u8fd9\u91cc\u8981\u4ecb\u7ecd\u53e6\u4e00\u79cd\u66f4\u4f18\u7684\u89e3\u51b3\u65b9\u6848：\u65f6\u95f4\u8f6e<\/span><\/p>\n<\/p>\n

\u65f6\u95f4\u8f6e\u7684\u7075\u611f\u6765\u81ea\u949f\u8868\u673a\u5236\u3002\u5c31\u50cf\u8bbe\u5b9a3\u70b9\u949f\u95f9\u949f\u540e，\u65f6\u9488\u8d70\u52303\u65f6\u5c31\u4f1a\u89e6\u53d1\u94c3\u58f0\u3002<\/span><\/p>\n

\u540c\u6837\u5730，\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\u6307\u9488，\u6307\u9488\u6bcf\u79d2\u79fb\u52a8\u4e00\u4e2a\u4f4d\u7f6e\u3002\u5f53\u6307\u9488\u79fb\u52a8\u5230\u67d0\u4e2a\u4f4d\u7f6e\u65f6，\u5c31\u6267\u884c\u8be5\u4f4d\u7f6e\u5bf9\u5e94\u7684\u4efb\u52a1\u3002<\/span><\/p>\n

\u5177\u4f53\u5b9e\u73b0\u65f6，\u5982\u679c\u60f3\u8bbe\u5b9a3\u79d2\u540e\u7684\u4efb\u52a1，\u53ea\u9700\u5c06\u4efb\u52a1\u6dfb\u52a0\u5230\u6307\u9488\u5f53\u524d\u4f4d\u7f6e+3\u7684\u4f4d\u7f6e\u3002\u968f\u7740\u6307\u9488\u6bcf\u79d2\u79fb\u52a8\u4e00\u6b65，3\u79d2\u540e\u5c31\u4f1a\u5230\u8fbe\u5bf9\u5e94\u4f4d\u7f6e，\u6267\u884c\u8be5\u4efb\u52a1\u3002<\/span><\/p>\n<\/p>\n

\u7136\u800c，\u5728\u540c\u4e00\u4e2a\u65f6\u95f4\u70b9\u53ef\u80fd\u4f1a\u51fa\u73b0\u5927\u91cf\u5b9a\u65f6\u4efb\u52a1\u540c\u65f6\u89e6\u53d1\u7684\u60c5\u51b5\u3002\u4e3a\u6b64，\u6211\u4eec\u53ef\u4ee5\u4e3a\u6570\u7ec4\u7684\u6bcf\u4e2a\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u5b50\u6570\u7ec4（\u4e0b\u62c9\u6570\u7ec4），\u4ece\u800c\u5141\u8bb8\u5728\u76f8\u540c\u65f6\u95f4\u70b9\u5b58\u50a8\u591a\u4e2a\u5b9a\u65f6\u4efb\u52a1\u3002<\/span><\/p>\n

\"\"<\/p>\n

\u200b<\/p>\n

tick（\u6ef4\u7b54\u6307\u9488，\u6307\u5411\u54ea\u91cc，\u5c31\u8868\u793a\u54ea\u91cc\u7684\u4efb\u52a1\u8d85\u65f6\u4e86，3s\u540e\u88ab\u6267\u884c）<\/span><\/p>\n

\u5982\u679ctick\u6ef4\u7b54，\u662f\u4ee5\u79d2\u4f5c\u4e3a\u8ba1\u65f6\u5355\u4f4d，\u5219\u5f53\u524d\u8fd9\u6570\u7ec4\u67097\u4e2a\u5143\u7d20，\u5219\u6700\u5927\u5b9a\u65f6\u65f6\u95f4\u5c31\u53ea\u67097s\u3002<\/span><\/p>\n

\u5982\u679c\u5b9a\u65f6\u5668\u60f3\u8981\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u5927\u65f6\u95f4\u7684\u5b9a\u65f6\u4efb\u52a1\u5c31\u53ef\u4ee5\u4f7f\u7528\u591a\u7ea7\u65f6\u95f4\u8f6e<\/span><\/p>\n

\u591a\u7ea7\u65f6\u95f4\u8f6e（\u8fd9\u91cc\u662f\u4e00\u4e2a\u5929\u7ea7：60s 60min 24h）<\/span><\/p>\n

\"\"\u200b<\/p>\n

\u7f3a\u9677：<\/span><\/p>\n

1.\u540c\u4e00\u65f6\u523b\u7684\u5b9a\u65f6\u4efb\u52a1\u53ea\u80fd\u6dfb\u52a0\u4e00\u4e2a，\u9700\u8981\u8003\u8651\u5982\u4f55\u5728<\/span>\u540c\u4e00\u65f6\u523b\u652f\u6301\u6dfb\u52a0\u591a\u4e2a\u5b9a\u65f6\u4efb\u52a1<\/span><\/p>\n

\u89e3\u51b3\u65b9\u6848：\u5c06\u65f6\u95f4\u8f6e\u7684\u4e00\u7ef4\u6570\u7ec4\u8bbe\u8ba1\u4e3a<\/span>\u4e8c\u7ef4\u6570\u7ec4（\u65f6\u95f4\u8f6e\u4e00\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e5f\u662f\u4e00\u4e2a\u6570\u7ec4）<\/span><\/p>\n

2.\u5047\u8bbe\u5f53\u524d\u7684\u5b9a\u65f6\u4efb\u52a1\u662f\u4e00\u4e2a\u8fde\u63a5\u7684\u975e\u6d3b\u8dc3\u9500\u6bc1\u4efb\u52a1，\u8fd9\u4e2a\u4efb\u52a1\u4ec0\u4e48\u65f6\u5019\u6dfb\u52a0\u5230\u65f6\u95f4\u8f6e\u4e2d\u6bd4\u8f83\u5408\u9002？<\/span><\/p>\n

\u4e00\u4e2a\u8fde\u63a530s\u5185\u90fd\u6ca1\u6709\u901a\u4fe1，\u5219\u662f\u4e00\u4e2a\u975e\u6d3b\u8dc3\u8fde\u63a5，\u8fd9\u65f6\u5019\u5c31\u9500\u6bc1\u3002\u4f46\u662f\u4e00\u4e2a\u8fde\u63a5\u5728\u5efa\u7acb\u7684\u65f6\u5019\u6dfb\u52a0\u4e86\u4e00\u4e2a30s\u540e\u9500\u6bc1\u7684\u4efb\u52a1，\u5e76\u4e14\u8fd9\u4e2a\u8fde\u63a530s\u5185\u4eba\u5bb6\u6709\u6570\u636e\u901a\u4fe1，\u5728\u7b2c30s\u7684\u65f6\u5019\u5c31\u4e0d\u662f\u4e00\u4e2a\u975e\u6d3b\u8dc3\u8fde\u63a5\u3002<\/span><\/p>\n

\u601d\u60f3：\u9700\u8981\u5728\u4e00\u4e2a\u8fde\u63a5\u6709IO\u4e8b\u4ef6\u4ea7\u751f\u7684\u65f6\u5019，\u5ef6\u8fdf\u5b9a\u65f6\u4efb\u52a1\u7684\u6267\u884c\u3002<\/span><\/p>\n

\u4f5c\u4e3a\u4e00\u4e2a\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668，\u672c\u8eab\u5e76\u4e0d\u5173\u6ce8\u4efb\u52a1\u7c7b\u578b，\u53ea\u8981\u662f\u65f6\u95f4\u5230\u4e86，\u5c31\u9700\u8981\u88ab\u6267\u884c（\u6211\u4eec\u8981\u7814\u7a76\u7684\u662f\u5982\u4f55\u7ed5\u5f00，\u5e76\u4e14\u8ba9\u8be5\u4efb\u52a1\u5ef6\u8fdf）<\/span><\/p>\n

\u89e3\u51b3\u65b9\u6848：\u7c7b\u7684\u6790\u6784\u51fd\u6570+\u667a\u80fd\u6307\u9488shared_ptr，\u901a\u8fc7\u8fd9\u4e24\u4e2a\u6280\u672f\u53ef\u4ee5\u5b9e\u73b0\u5b9a\u65f6\u4efb\u52a1\u7684\u5ef6\u65f6<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 1.\u4f7f\u7528\u4e00\u4e2a\u7c7b，\u5bf9\u5b9a\u65f6\u4efb\u52a1\u8fdb\u884c\u5c01\u88c5，\u7c7b\u5b9e\u4f8b\u5316\u6bcf\u4e00\u4e2a\u5bf9\u8c61，\u5c31\u662f\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61，\u5f53\u5bf9\u8c61\u88ab\u9500\u6bc1\u7684\u65f6\u5019，\u518d\u53bb\u6267\u884c\u5b9a\u65f6\u4efb\u52a1（\u5c06\u5b9a\u65f6\u4efb\u52a1\u7684\u6267\u884c，\u653e\u5230\u6790\u6784\u51fd\u6570\u4e2d）<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 2.shared_ptr\u7528\u4e8e\u5bf9new\u7684\u5bf9\u8c61\u8fdb\u884c\u7a7a\u95f4\u7ba1\u7406，\u5f53shared_ptr\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u8fdb\u884c\u7ba1\u7406\u7684\u65f6\u5019，\u5185\u90e8\u6709\u4e00\u4e2a\u8ba1\u6570\u5668，\u8ba1\u6570\u5668\u4e3a0\u7684\u65f6\u5019，\u5219\u91ca\u653e\u6240\u7ba1\u7406\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n

int *a = new int;<\/span><\/p>\n

std::shared_ptr<int> pi(a); —a\u5bf9\u8c61\u53ea\u6709\u5728pi\u8ba1\u6570\u4e3a0\u7684\u65f6\u5019\u624d\u4f1a\u88ab\u91ca\u653e<\/span><\/p>\n

std::shared_ptr<int>pi1(pi);–\u9488\u5bf9pi\u53c8\u6784\u5efa\u4e86\u4e00\u4e2ashared_ptr\u5bf9\u8c61，\u5219pi\u548cpi1\u8ba1\u6570\u5668\u4e3a2<\/span><\/p>\n<\/p>\n

\u5f53pi\u548cpi1\u4e2d\u4efb\u610f\u4e00\u4e2a\u88ab\u91ca\u653e\u7684\u65f6\u5019，\u53ea\u6709\u8ba1\u6570\u5668-1，\u56e0\u6b64\u4ed6\u4eec\u7ba1\u7406\u7684a\u5bf9\u8c61\u5e76\u6ca1\u6709\u88ab\u91ca\u653e，\u53ea\u6709\u5f53pi\u548cpi1\u90fd\u88ab\u91ca\u653e\u4e86，\u8ba1\u6570\u5668\u4e3a0\u4e86，\u8fd9\u65f6\u5019\u624d\u4f1a\u91ca\u653e\u7ba1\u7406\u7684a\u5bf9\u8c61<\/span><\/p>\n

\u57fa\u4e8e\u8fd9\u4e2a\u601d\u60f3，\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528shared_ptr\u6765\u7ba1\u7406\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61，\u667a\u80fd\u6307\u9488\u7684\u4f7f\u7528\u8be6\u89e3<\/span><\/p>\n

shared_ptr\u6765\u7ba1\u7406\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61<\/span><\/h5>\n

\u5728\u5b9e\u73b0\u8fc7\u7a0b\u4e2d，\u6211\u4eec\u91c7\u7528\u4e86\u667a\u80fd\u6307\u9488shared_ptr\u3002shared_ptr\u901a\u8fc7\u5f15\u7528\u8ba1\u6570\u5668\u7ba1\u7406\u5bf9\u8c61\u751f\u547d\u5468\u671f，\u53ea\u6709\u5f53\u8ba1\u6570\u5f52\u96f6\u65f6\u624d\u4f1a\u91ca\u653e\u8d44\u6e90\u3002\u5047\u8bbe\u8fde\u63a5\u5728\u7b2c10\u79d2\u8fdb\u884c\u4e00\u6b21\u901a\u4fe1，\u6211\u4eec\u4f1a\u5411\u5b9a\u65f6\u4efb\u52a1\u961f\u5217\u4e2d\u6dfb\u52a0\u4e00\u4e2a30\u79d2\u540e（\u5373\u7b2c40\u79d2）\u6267\u884c\u7684\u4efb\u52a1\u7c7b\u5bf9\u8c61\u7684shared_ptr\u3002\u6b64\u65f6\u4e24\u4e2a\u4efb\u52a1shared_ptr\u7684\u5f15\u7528\u8ba1\u6570\u53d8\u4e3a2\u3002\u5f53\u7b2c30\u79d2\u7684\u5b9a\u65f6\u4efb\u52a1\u91ca\u653e\u65f6，\u8ba1\u6570\u51cf1\u53d8\u4e3a1，\u7531\u4e8e\u4e0d\u4e3a0，\u4e0d\u4f1a\u89e6\u53d1\u5b9e\u9645\u6790\u6784\u3002\u8fd9\u610f\u5473\u7740\u7b2c30\u79d2\u7684\u4efb\u52a1\u81ea\u52a8\u5931\u6548，\u800c\u771f\u6b63\u7684\u8d44\u6e90\u91ca\u653e\u4f1a\u5ef6\u8fdf\u5230\u7b2c40\u79d2\u7684\u4efb\u52a1\u6267\u884c\u65f6\u624d\u5b8c\u6210<\/span><\/p>\n

2.2.3\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u8bbe\u8ba1<\/span><\/h4>\n

#include <memory>
\n#include <functional>
\n#include <iostream>
\n#include <vector>
\n#include <unordered_map>
\n#include <cstdint><\/p>\n

using TaskFunc = std::function<void()>; \/\/ \u5b9a\u65f6\u4efb\u52a1\u51fd\u6570\u7c7b\u578b
\nusing ReleaseFunc = std::function<void()>;
\nclass TimerTask
\n{
\nprivate:
\n uint64_t _id; \/\/ \u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61ID
\n uint32_t _timeout; \/\/ \u5b9a\u65f6\u4efb\u52a1\u7684\u8d85\u65f6\u65f6\u95f4
\n TaskFunc _task_cb; \/\/ \u5b9a\u65f6\u5668\u5bf9\u8c61\u8981\u6267\u884c\u7684\u5b9a\u65f6\u4efb\u52a1
\n ReleaseFunc _release; \/\/ \u7528\u4e8e\u5220\u9664TimerWheel\u4e2d\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u4fe1\u606f
\npublic:
\n TimerTask(uint64_t id, uint32_t delay \/*\u5ef6\u8fdf\u65f6\u95f4*\/, const TaskFunc &cb) : _id(id), _timeout(delay), _task_cb(cb) {};
\n ~TimerTask()
\n {
\n _task_cb();
\n _release();
\n }
\n void SetRelease(const ReleaseFunc &cb) { _release = cb; }
\n};<\/p>\n

class TimerWheel
\n{
\nprivate:
\n using WeakTask = std::weak_ptr<TimerTask>;
\n using PtrTask = std::shared_ptr<TimerTask>;
\n int _tick; \/\/ tick\u8d70\u5230\u54ea\u91cc\u5c31\u91ca\u653e\u54ea\u91cc\u7684\u5bf9\u8c61，\u91ca\u653e\u54ea\u91cc，\u5c31\u76f8\u5f53\u4e8e\u6267\u884c\u54ea\u91cc\u7684\u4efb\u52a1
\n int _capacity; \/\/ \u8868\u76d8\u6700\u5927\u6570\u91cf—\u5176\u5b9e\u5c31\u662f\u6700\u5927\u5ef6\u8fdf\u65f6\u95f4
\n \/\/ \u5f53\u6211\u4eec\u8981\u4e8c\u6b21\u6dfb\u52a0\u540c\u4e00\u4e2a\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61\u7684\u65f6\u5019，\u5f97\u80fd\u591f\u627e\u5230\u4ed6\u4eec\u7684\u540c\u4e00\u4e2a\u8ba1\u6570\u5668，\u4f7f\u7528weak_ptr\u8f85\u52a9shared_ptr
\n \/\/ \u4fdd\u5b58\u6240\u6709\u5b9a\u65f6\u5668\u7684weak_ptr\u5bf9\u8c61，\u56e0\u4e3a\u53ea\u6709\u4fdd\u5b58\u4e86WeakTask\u624d\u6709\u53ef\u80fd\u901a\u8fc7WeakTask\u6784\u9020\u51fa\u65b0\u7684shared_ptr，
\n \/\/ \u5e76\u4e14\u4ed6\u4eec\u5171\u4eab\u8ba1\u6570,\u5e76\u4e14WeakTask\u81ea\u8eab\u4e0d\u5f71\u54cd\u8ba1\u6570
\n std::vector<std::vector<PtrTask>> _wheel;
\n std::unordered_map<uint64_t, WeakTask> _timers;<\/p>\n

public:
\n TimerWheel() : _capacity(60), _tick(0), _wheel(_capacity) {}<\/p>\n

void TimerAdd(uint64_t id, uint32_t delay, const TaskFunc &cb); \/\/ \u6dfb\u52a0\u5b9a\u65f6\u4efb\u52a1
\n void TimerRefresh(uint64_t id); \/\/ \u5237\u65b0\/\u5ef6\u8fdf\u5b9a\u65f6\u4efb\u52a1
\n}; <\/p>\n

\u8fd9\u6bb5\u4ee3\u7801\u5b9e\u73b0\u4e86\u4e00\u4e2a\u57fa\u4e8e\u5b9a\u65f6\u8f6e\u76d8（Timer Wheel）\u7684\u5b9a\u65f6\u4efb\u52a1\u8c03\u5ea6\u5668，\u7528\u4e8e\u7ba1\u7406\u548c\u6267\u884c\u5b9a\u65f6\u4efb\u52a1\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u7684\u4ee3\u7801\u8bb2\u89e3：<\/span><\/p>\n

1.\u00a0TimerTask\u00a0\u7c7b<\/span><\/p>\n

    \n
  • \n

    \u529f\u80fd ：\u8868\u793a\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1，\u5c01\u88c5\u4e86\u4efb\u52a1\u7684 ID\u3001\u5ef6\u8fdf\u65f6\u95f4\u3001\u4efb\u52a1\u56de\u8c03\u51fd\u6570\u4ee5\u53ca\u91ca\u653e\u56de\u8c03\u51fd\u6570\u3002<\/span><\/p>\n<\/li>\n

  • \n

    \u4e3b\u8981\u6210\u5458\u53d8\u91cf ：<\/span><\/p>\n

      \n
    • \n

      _id ：\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61\u7684\u552f\u4e00\u6807\u8bc6\u7b26，\u7528\u4e8e\u533a\u5206\u4e0d\u540c\u7684\u5b9a\u65f6\u4efb\u52a1\u3002<\/span><\/p>\n<\/li>\n

    • \n

      _timeout ：\u5b9a\u65f6\u4efb\u52a1\u7684\u8d85\u65f6\u65f6\u95f4，\u5373\u4efb\u52a1\u9700\u8981\u5ef6\u8fdf\u6267\u884c\u7684\u65f6\u95f4\u3002<\/span><\/p>\n<\/li>\n

    • \n

      _task_cb ：\u5b9a\u65f6\u4efb\u52a1\u7684\u5177\u4f53\u6267\u884c\u903b\u8f91，\u5f53\u5b9a\u65f6\u4efb\u52a1\u5230\u671f\u65f6，\u4f1a\u8c03\u7528\u8fd9\u4e2a\u56de\u8c03\u51fd\u6570\u6765\u6267\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002<\/span><\/p>\n<\/li>\n

    • \n

      _release ：\u7528\u4e8e\u5220\u9664 TimerWheel \u4e2d\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u4fe1\u606f\u7684\u56de\u8c03\u51fd\u6570，\u5728\u5b9a\u65f6\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u6216\u88ab\u53d6\u6d88\u65f6，\u4f1a\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u6765\u6e05\u7406\u8d44\u6e90\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      \u6784\u9020\u51fd\u6570 ：\u521d\u59cb\u5316\u5b9a\u65f6\u4efb\u52a1\u7684 ID\u3001\u5ef6\u8fdf\u65f6\u95f4\u548c\u4efb\u52a1\u56de\u8c03\u51fd\u6570\u3002<\/span><\/p>\n<\/li>\n

    • \n

      \u6790\u6784\u51fd\u6570 ：\u5728\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u88ab\u9500\u6bc1\u65f6，\u6267\u884c\u4efb\u52a1\u56de\u8c03\u51fd\u6570 _task_cb \u548c\u91ca\u653e\u56de\u8c03\u51fd\u6570 _release ，\u4ee5\u786e\u4fdd\u4efb\u52a1\u88ab\u6267\u884c\u5e76\u4e14\u76f8\u5173\u8d44\u6e90\u88ab\u6b63\u786e\u91ca\u653e\u3002<\/span><\/p>\n<\/li>\n

    • \n

      SetRelease \u65b9\u6cd5 ：\u7528\u4e8e\u8bbe\u7f6e\u91ca\u653e\u56de\u8c03\u51fd\u6570 _release ，\u4ee5\u4fbf\u5728\u9700\u8981\u65f6\u80fd\u591f\u6e05\u7406 TimerWheel \u4e2d\u7684\u5b9a\u65f6\u4efb\u52a1\u8bb0\u5f55\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

      2.\u00a0TimerWheel\u00a0\u7c7b<\/span><\/p>\n

        \n
      • \n

        \u529f\u80fd ：\u4e00\u4e2a\u5b9a\u65f6\u8f6e\u76d8，\u7528\u4e8e\u7ba1\u7406\u591a\u4e2a\u5b9a\u65f6\u4efb\u52a1，\u652f\u6301\u6dfb\u52a0\u65b0\u7684\u5b9a\u65f6\u4efb\u52a1\u548c\u5237\u65b0\u5df2\u5b58\u5728\u7684\u5b9a\u65f6\u4efb\u52a1\u7684\u5ef6\u8fdf\u65f6\u95f4\u3002<\/span><\/p>\n<\/li>\n

      • \n

        \u4e3b\u8981\u6210\u5458\u53d8\u91cf ：<\/span><\/p>\n

          \n
        • \n

          _wheel ：\u4e00\u4e2a\u4e8c\u7ef4\u5411\u91cf，\u6a21\u62df\u5b9a\u65f6\u8f6e\u76d8\u7684\u7ed3\u6784\u3002\u6bcf\u4e2a\u5143\u7d20\u662f\u4e00\u4e2a\u5305\u542b PtrTask （std::shared_ptr<TimerTask> \u7c7b\u578b）\u7684\u5411\u91cf，\u4ee3\u8868\u5b9a\u65f6\u8f6e\u76d8\u4e0a\u7684\u4e00\u4e2a\u69fd（slot）\u3002\u5b9a\u65f6\u4efb\u52a1\u6839\u636e\u5176\u5ef6\u8fdf\u65f6\u95f4\u88ab\u653e\u7f6e\u5728\u76f8\u5e94\u7684\u69fd\u4e2d，\u5f53\u8f6e\u76d8\u7684\u6307\u9488（_tick）\u79fb\u52a8\u5230\u8be5\u69fd\u65f6，\u5c31\u4f1a\u6267\u884c\u5176\u4e2d\u7684\u5b9a\u65f6\u4efb\u52a1\u3002<\/span><\/p>\n<\/li>\n

        • \n

          _tick ：\u8868\u793a\u5b9a\u65f6\u8f6e\u76d8\u5f53\u524d\u6240\u6307\u5411\u7684\u69fd\u7684\u4f4d\u7f6e\u3002\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb，_tick \u4f1a\u4e0d\u65ad\u9012\u589e，\u5f53\u8fbe\u5230 _capacity \u65f6，\u4f1a\u91cd\u65b0\u4ece 0 \u5f00\u59cb\u5faa\u73af，\u6a21\u62df\u8f6e\u76d8\u7684\u65cb\u8f6c\u3002<\/span><\/p>\n<\/li>\n

        • \n

          _capacity ：\u5b9a\u65f6\u8f6e\u76d8\u7684\u6700\u5927\u5bb9\u91cf，\u5373\u8f6e\u76d8\u4e0a\u69fd\u7684\u6570\u91cf，\u540c\u65f6\u4e5f\u662f\u5b9a\u65f6\u4efb\u52a1\u7684\u6700\u5927\u5ef6\u8fdf\u65f6\u95f4\u9650\u5236\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，\u521d\u59cb\u5bb9\u91cf\u88ab\u8bbe\u7f6e\u4e3a 60，\u610f\u5473\u7740\u5b9a\u65f6\u4efb\u52a1\u7684\u5ef6\u8fdf\u65f6\u95f4\u4e0d\u80fd\u8d85\u8fc7 60 \u4e2a\u65f6\u95f4\u5355\u4f4d（\u5177\u4f53\u7684\u65f6\u95f4\u5355\u4f4d\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u5e94\u7528\u573a\u666f\u6765\u5b9a\u4e49，\u4f8b\u5982\u79d2\u3001\u6beb\u79d2\u7b49）\u3002<\/span><\/p>\n<\/li>\n

        • \n

          _timers ：\u4e00\u4e2a\u65e0\u5e8f\u6620\u5c04（std::unordered_map），\u7528\u4e8e\u4fdd\u5b58\u6240\u6709\u5b9a\u65f6\u4efb\u52a1\u7684\u5f31\u5f15\u7528（std::weak_ptr<TimerTask>）\u3002\u952e\u662f\u5b9a\u65f6\u4efb\u52a1\u7684 ID，\u503c\u662f\u5bf9\u5e94\u7684\u5f31\u5f15\u7528\u3002\u901a\u8fc7\u4f7f\u7528\u5f31\u5f15\u7528，\u53ef\u4ee5\u5728\u4e0d\u589e\u52a0\u5f15\u7528\u8ba1\u6570\u7684\u60c5\u51b5\u4e0b，\u8ddf\u8e2a\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61，\u5e76\u4e14\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u901a\u8fc7\u5f31\u5f15\u7528\u6765\u6784\u9020\u65b0\u7684\u5171\u4eab\u6307\u9488，\u4ece\u800c\u8bbf\u95ee\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

          ***\u667a\u80fd\u6307\u9488\u7684\u4f7f\u7528***<\/span><\/h5>\n
            \n
          • \n

            \u4f7f\u7528 std::shared_ptr<TimerTask>（PtrTask）\u6765\u7ba1\u7406\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f，\u786e\u4fdd\u591a\u4e2a\u90e8\u5206\u53ef\u4ee5\u5b89\u5168\u5730\u5171\u4eab\u5bf9\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u7684\u8bbf\u95ee，\u5e76\u4e14\u5bf9\u8c61\u4f1a\u5728\u6240\u6709\u5171\u4eab\u6307\u9488\u90fd\u91ca\u653e\u540e\u81ea\u52a8\u88ab\u9500\u6bc1\u3002<\/span><\/p>\n<\/li>\n

          • \n

            \u4f7f\u7528 std::weak_ptr<TimerTask>（WeakTask）\u6765\u4fdd\u5b58\u5b9a\u65f6\u4efb\u52a1\u7684\u5f31\u5f15\u7528，\u907f\u514d\u5728 _timers \u6620\u5c04\u4e2d\u76f4\u63a5\u4fdd\u5b58\u5171\u4eab\u6307\u9488\u800c\u5bfc\u81f4\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570\u589e\u52a0，\u4ece\u800c\u9632\u6b62\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u88ab\u610f\u5916\u5730\u5ef6\u957f\u751f\u547d\u5468\u671f\u3002\u901a\u8fc7\u5f31\u5f15\u7528，\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u68c0\u67e5\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u662f\u5426\u4ecd\u7136\u5b58\u5728，\u5e76\u5728\u5b58\u5728\u65f6\u83b7\u53d6\u5176\u5171\u4eab\u6307\u9488\u3002<\/span><\/p>\n<\/li>\n

          • \n

            \u4efb\u52a1\u751f\u547d\u5468\u671f\u7ba1\u7406<\/span><\/p>\n<\/li>\n<\/ul>\n

            \"\"<\/p>\n

            \u200b<\/p>\n

            2.2.4\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u5b9e\u73b0<\/span><\/h4>\n

            #include <memory>
            \n#include <functional>
            \n#include <iostream>
            \n#include <vector>
            \n#include <unordered_map>
            \n#include <cstdint><\/p>\n

            #include <unistd.h><\/p>\n

            using TaskFunc = std::function<void()>; \/\/ \u5b9a\u65f6\u4efb\u52a1\u51fd\u6570\u7c7b\u578b
            \nusing ReleaseFunc = std::function<void()>;
            \nclass TimerTask
            \n{
            \nprivate:
            \n uint64_t _id; \/\/ \u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61ID
            \n uint32_t _timeout; \/\/ \u5b9a\u65f6\u4efb\u52a1\u7684\u8d85\u65f6\u65f6\u95f4
            \n bool _canceled; \/\/ false\u8868\u793a\u672a\u88ab\u53d6\u6d88，true\u8868\u793a\u88ab\u53d6\u6d88
            \n TaskFunc _task_cb; \/\/ \u5b9a\u65f6\u5668\u5bf9\u8c61\u8981\u6267\u884c\u7684\u5b9a\u65f6\u4efb\u52a1
            \n ReleaseFunc _release; \/\/ \u7528\u4e8e\u5220\u9664TimerWheel\u4e2d\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u4fe1\u606f
            \npublic:
            \n TimerTask(uint64_t id, uint32_t delay \/*\u5ef6\u8fdf\u65f6\u95f4*\/, const TaskFunc &cb)
            \n : _id(id), _timeout(delay), _task_cb(cb), _canceled(false) {}
            \n ~TimerTask()
            \n {
            \n if (_canceled == false)
            \n _task_cb();
            \n _release();
            \n }
            \n void Cancel()
            \n {
            \n _canceled = true;
            \n }
            \n void SetRelease(const ReleaseFunc &cb) { _release = cb; }
            \n uint32_t DelayTime() { return _timeout; };
            \n};<\/p>\n

            class TimerWheel
            \n{
            \nprivate:
            \n using WeakTask = std::weak_ptr<TimerTask>;
            \n using PtrTask = std::shared_ptr<TimerTask>;
            \n int _tick; \/\/ tick\u8d70\u5230\u54ea\u91cc\u5c31\u91ca\u653e\u54ea\u91cc\u7684\u5bf9\u8c61，\u91ca\u653e\u54ea\u91cc，\u5c31\u76f8\u5f53\u4e8e\u6267\u884c\u54ea\u91cc\u7684\u4efb\u52a1
            \n int _capacity; \/\/ \u8868\u76d8\u6700\u5927\u6570\u91cf—\u5176\u5b9e\u5c31\u662f\u6700\u5927\u5ef6\u8fdf\u65f6\u95f4
            \n \/\/ \u5f53\u6211\u4eec\u8981\u4e8c\u6b21\u6dfb\u52a0\u540c\u4e00\u4e2a\u5b9a\u65f6\u5668\u4efb\u52a1\u5bf9\u8c61\u7684\u65f6\u5019，\u5f97\u80fd\u591f\u627e\u5230\u4ed6\u4eec\u7684\u540c\u4e00\u4e2a\u8ba1\u6570\u5668，\u4f7f\u7528weak_ptr\u8f85\u52a9shared_ptr
            \n \/\/ \u4fdd\u5b58\u6240\u6709\u5b9a\u65f6\u5668\u7684weak_ptr\u5bf9\u8c61，\u56e0\u4e3a\u53ea\u6709\u4fdd\u5b58\u4e86WeakTask\u624d\u6709\u53ef\u80fd\u901a\u8fc7WeakTask\u6784\u9020\u51fa\u65b0\u7684shared_ptr，
            \n \/\/ \u5e76\u4e14\u4ed6\u4eec\u5171\u4eab\u8ba1\u6570,\u5e76\u4e14WeakTask\u81ea\u8eab\u4e0d\u5f71\u54cd\u8ba1\u6570
            \n std::vector<std::vector<PtrTask>> _wheel;
            \n std::unordered_map<uint64_t, WeakTask> _timers;<\/p>\n

            private:
            \n void RemoveTimerInfo(uint64_t id)
            \n {
            \n auto it = _timers.find(id);
            \n if (it != _timers.end())
            \n {
            \n _timers.erase(it);
            \n }
            \n }<\/p>\n

            public:
            \n TimerWheel() : _capacity(60), _tick(0), _wheel(_capacity) {}
            \n \/\/ \u6dfb\u52a0\u5b9a\u65f6\u4efb\u52a1
            \n void TimerAdd(uint64_t id, uint32_t delay, const TaskFunc &cb)
            \n {
            \n PtrTask pt(new TimerTask(id, delay, cb));
            \n pt->SetRelease(std::bind(&TimerWheel::RemoveTimerInfo, this, id));
            \n int pos = (_tick + delay) % _capacity;
            \n _wheel[pos].push_back(pt);
            \n _timers[id] = WeakTask(pt);
            \n }
            \n \/\/ \u5237\u65b0\/\u5ef6\u8fdf\u5b9a\u65f6\u4efb\u52a1
            \n void TimerRefresh(uint64_t id)
            \n {
            \n \/\/ \u901a\u8fc7\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u7684weak_ptr\u6784\u9020\u4e00\u4e2ashared_ptr\u51fa\u6765，\u6dfb\u52a0\u5230\u8f6e\u5b50\u4e2d
            \n auto it = _timers.find(id);
            \n if (it == _timers.end())
            \n {
            \n \/\/ \u6ca1\u627e\u5230\u5b9a\u65f6\u4efb\u52a1，\u6ca1\u6cd5\u5237\u65b0，\u6ca1\u6cd5\u5ef6\u65f6
            \n return;
            \n }
            \n PtrTask pt = it->second.lock(); \/\/ lock\u83b7\u53d6weak_ptr\u6240\u7ba1\u7406\u5bf9\u8c61\u5bf9\u5e94\u7684\u7684shared_ptr
            \n int delay = pt->DelayTime();
            \n int pos = (_tick + delay) % _capacity;
            \n _wheel[pos].push_back(pt);
            \n }
            \n \/\/ \u53d6\u6d88\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1
            \n void TimerCancel(uint64_t id)
            \n {
            \n \/\/ \u901a\u8fc7\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u7684weak_ptr\u6784\u9020\u4e00\u4e2ashared_ptr\u51fa\u6765，\u6dfb\u52a0\u5230\u8f6e\u5b50\u4e2d
            \n auto it = _timers.find(id);
            \n if (it == _timers.end())
            \n {
            \n \/\/ \u6ca1\u627e\u5230\u5b9a\u65f6\u4efb\u52a1，\u6ca1\u6cd5\u5237\u65b0，\u6ca1\u6cd5\u5ef6\u65f6
            \n return;
            \n }
            \n PtrTask pt = it->second.lock(); \/\/ lock\u83b7\u53d6weak_ptr\u6240\u7ba1\u7406\u5bf9\u8c61\u5bf9\u5e94\u7684\u7684shared_ptr
            \n if (pt)
            \n pt->Cancel();
            \n }
            \n \/\/ \u8fd9\u4e2a\u51fd\u6570\u6bcf\u79d2\u949f\u6267\u884c\u4e00\u6b21，\u76f8\u5f53\u4e8e\u79d2\u9488\u5411\u540e\u8d70\u4e86\u4e00\u6b65
            \n void RunTimerTask()
            \n {
            \n _tick = (_tick + 1) % _capacity;
            \n _wheel[_tick].clear(); \/\/ \u6e05\u7a7a\u6307\u5b9a\u4f4d\u7f6e\u7684\u6570\u7ec4，\u5c31\u80fd\u5c06\u6570\u7ec4\u4e2d\u4fdd\u5b58\u7684\u6240\u6709\u7ba1\u7406\u5bf9\u8c61\u7684shared_ptr\u91ca\u653e\u6389
            \n }
            \n}; <\/p>\n

            1. \u52a8\u6001\u521b\u5efa\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61<\/span><\/p>\n

            \u5728 TimerAdd \u51fd\u6570\u4e2d，\u4f7f\u7528 std::shared_ptr \u52a8\u6001\u521b\u5efa TimerTask \u5bf9\u8c61：<\/span><\/p>\n

            PtrTask pt(new TimerTask(id, delay, cb)); <\/p>\n

            \u8fd9\u79cd\u65b9\u5f0f\u5141\u8bb8\u5728\u4ee3\u7801\u8fd0\u884c\u65f6\u6839\u636e\u9700\u8981\u521b\u5efa\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61，\u5e76\u901a\u8fc7\u667a\u80fd\u6307\u9488\u7ba1\u7406\u5176\u751f\u547d\u5468\u671f\u3002<\/span><\/p>\n

            2. \u8bbe\u7f6e\u91ca\u653e\u56de\u8c03\u51fd\u6570<\/span><\/p>\n

            \u5728\u521b\u5efa\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u540e，\u8c03\u7528 SetRelease \u65b9\u6cd5\u5c06 RemoveTimerInfo \u51fd\u6570\u7ed1\u5b9a\u5230\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u7684\u91ca\u653e\u56de\u8c03\u51fd\u6570\u4e0a：<\/span><\/p>\n

            pt->SetRelease(std::bind(RemoveTimerInfo, this, id)); <\/p>\n

            \u5f53\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u88ab\u9500\u6bc1\u65f6，\u4f1a\u81ea\u52a8\u8c03\u7528 RemoveTimerInfo \u51fd\u6570，\u4ece _timers \u6620\u5c04\u4e2d\u79fb\u9664\u8be5\u5b9a\u65f6\u4efb\u52a1\u7684\u8bb0\u5f55\u3002<\/span><\/p>\n

            3. \u8ba1\u7b97\u5b9a\u65f6\u4efb\u52a1\u5728\u8f6e\u76d8\u4e0a\u7684\u4f4d\u7f6e<\/span> \u5728 TimerAdd \u548c TimerRefresh \u51fd\u6570\u4e2d，\u6839\u636e\u5f53\u524d\u7684 _tick \u503c（\u8f6e\u76d8\u6307\u9488\u4f4d\u7f6e）\u548c\u4efb\u52a1\u7684\u5ef6\u8fdf\u65f6\u95f4 delay，\u8ba1\u7b97\u5b9a\u65f6\u4efb\u52a1\u5728\u8f6e\u76d8\u4e0a\u7684\u4f4d\u7f6e：<\/span><\/p>\n

            int pos = (_tick + delay) % _capacity; <\/p>\n

            \u8fd9\u79cd\u65b9\u6cd5\u786e\u4fdd\u5b9a\u65f6\u4efb\u52a1\u80fd\u591f\u6839\u636e\u5176\u5ef6\u8fdf\u65f6\u95f4\u88ab\u6b63\u786e\u5730\u653e\u7f6e\u5728\u8f6e\u76d8\u7684\u76f8\u5e94\u69fd\u4e2d\u3002<\/span><\/p>\n

            4. \u5c06\u5b9a\u65f6\u4efb\u52a1\u6dfb\u52a0\u5230\u8f6e\u76d8<\/span><\/p>\n

            \u5728 TimerAdd \u548c TimerRefresh \u51fd\u6570\u4e2d，\u5c06\u5b9a\u65f6\u4efb\u52a1\u7684\u5171\u4eab\u6307\u9488\u6dfb\u52a0\u5230 _wheel \u7684\u5bf9\u5e94\u69fd\u4e2d：<\/span><\/p>\n

            _wheel[pos].push_back(pt); <\/p>\n

            \u8fd9\u4f7f\u5f97\u5b9a\u65f6\u4efb\u52a1\u80fd\u591f\u5728\u8f6e\u76d8\u5230\u8fbe\u8be5\u69fd\u65f6\u88ab\u89e6\u53d1\u3002<\/span><\/p>\n

            5. \u66f4\u65b0\u5b9a\u65f6\u4efb\u52a1\u6620\u5c04<\/span><\/p>\n

            \u5728 TimerAdd \u51fd\u6570\u4e2d，\u5c06\u5b9a\u65f6\u4efb\u52a1\u7684\u5f31\u5f15\u7528\u6dfb\u52a0\u5230 _timers \u6620\u5c04\u4e2d：<\/span><\/p>\n

            _timers[id] = WeakTask(pt); <\/p>\n

            \u901a\u8fc7\u5f31\u5f15\u7528，\u53ef\u4ee5\u5728\u4e0d\u589e\u52a0\u5f15\u7528\u8ba1\u6570\u7684\u60c5\u51b5\u4e0b\u8ddf\u8e2a\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61，\u4fbf\u4e8e\u540e\u7eed\u7684\u5237\u65b0\u64cd\u4f5c\u3002<\/span><\/p>\n

            6. \u5237\u65b0\u5b9a\u65f6\u4efb\u52a1<\/span><\/p>\n

            \u5728 TimerRefresh \u51fd\u6570\u4e2d，\u4f7f\u7528\u5f31\u5f15\u7528\u6765\u83b7\u53d6\u5b9a\u65f6\u4efb\u52a1\u7684\u5171\u4eab\u6307\u9488，\u5e76\u91cd\u65b0\u8ba1\u7b97\u5176\u5728\u8f6e\u76d8\u4e0a\u7684\u4f4d\u7f6e：<\/span><\/p>\n

            PtrTask pt = it->second.lock();
            \n…
            \nint pos = (_tick + delay) % _capacity;
            \n_wheel[pos].push_back(pt); <\/p>\n

            \u8fd9\u5141\u8bb8\u5728\u5b9a\u65f6\u4efb\u52a1\u5df2\u7ecf\u5b58\u5728\u7684\u60c5\u51b5\u4e0b，\u66f4\u65b0\u5176\u5ef6\u8fdf\u65f6\u95f4\u5e76\u91cd\u65b0\u5c06\u5176\u6dfb\u52a0\u5230\u8f6e\u76d8\u4e2d\u3002<\/span><\/p>\n

            7. \u6267\u884c\u5b9a\u65f6\u4efb\u52a1<\/span><\/p>\n

            \u5728 RunTimerTask \u51fd\u6570\u4e2d，\u5c06\u8f6e\u76d8\u6307\u9488\u5411\u524d\u79fb\u52a8，\u5e76\u6e05\u7a7a\u5f53\u524d\u69fd\u4e2d\u7684\u6240\u6709\u5b9a\u65f6\u4efb\u52a1：<\/span><\/p>\n

            _tick = (_tick + 1) % _capacity;
            \n_wheel[_tick].clear(); <\/p>\n

            \u6e05\u7a7a\u69fd\u4e2d\u7684\u4efb\u52a1\u4f1a\u51cf\u5c11\u8fd9\u4e9b\u4efb\u52a1\u7684\u5f15\u7528\u8ba1\u6570，\u5982\u679c\u5f15\u7528\u8ba1\u6570\u53d8\u4e3a\u96f6，\u4efb\u52a1\u5bf9\u8c61\u5c06\u88ab\u9500\u6bc1，\u4ece\u800c\u89e6\u53d1\u5176\u6790\u6784\u51fd\u6570，\u6267\u884c\u4efb\u52a1\u903b\u8f91\u548c\u91ca\u653e\u64cd\u4f5c\u3002<\/span><\/p>\n<\/p>\n

            8. \u5728\u00a0TimerTask\u00a0\u7c7b\u4e2d\u65b0\u589e\u4efb\u52a1\u53d6\u6d88\u529f\u80fd<\/span><\/p>\n

              \n
            • \n

              \u65b0\u589e _canceled \u6210\u5458\u53d8\u91cf ：\u5e03\u5c14\u7c7b\u578b，\u9ed8\u8ba4\u503c\u4e3a false，\u8868\u793a\u5b9a\u65f6\u4efb\u52a1\u672a\u88ab\u53d6\u6d88\u3002\u5f53 _canceled \u4e3a true \u65f6，\u8868\u793a\u4efb\u52a1\u5df2\u88ab\u53d6\u6d88\u3002<\/span><\/p>\n<\/li>\n

            • \n

              \u65b0\u589e Cancel \u65b9\u6cd5 ：\u7528\u4e8e\u5c06 _canceled \u6807\u5fd7\u8bbe\u7f6e\u4e3a true，\u8868\u793a\u53d6\u6d88\u8be5\u5b9a\u65f6\u4efb\u52a1\u3002<\/span><\/p>\n<\/li>\n

            • \n

              \u5728\u6790\u6784\u51fd\u6570\u4e2d\u589e\u52a0\u6761\u4ef6\u5224\u65ad ：\u5982\u679c\u4efb\u52a1\u672a\u88ab\u53d6\u6d88（_canceled == false），\u5219\u6267\u884c\u4efb\u52a1\u56de\u8c03\u51fd\u6570 _task_cb \u3002\u5426\u5219，\u8df3\u8fc7\u4efb\u52a1\u7684\u6267\u884c，\u76f4\u63a5\u8c03\u7528\u91ca\u653e\u56de\u8c03\u51fd\u6570 _release \u3002\u8fd9\u5b9e\u73b0\u4e86\u4efb\u52a1\u53d6\u6d88\u529f\u80fd，\u5373\u5f53\u4efb\u52a1\u88ab\u53d6\u6d88\u65f6，\u5176\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

              9. \u5728\u00a0TimerWheel\u00a0\u7c7b\u4e2d\u65b0\u589e\u00a0TimerCancel\u00a0\u65b9\u6cd5<\/span><\/p>\n

                \n
              • \n

                \u8c03\u7528\u5b9a\u65f6\u4efb\u52a1\u7684 Cancel \u65b9\u6cd5 ：\u5982\u679c\u6210\u529f\u83b7\u53d6\u5230\u5171\u4eab\u6307\u9488（\u5373\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u5b58\u5728），\u5219\u8c03\u7528\u8be5\u5b9a\u65f6\u4efb\u52a1\u5bf9\u8c61\u7684 Cancel \u65b9\u6cd5，\u5c06\u5176 _canceled \u6807\u5fd7\u8bbe\u7f6e\u4e3a true，\u4ece\u800c\u53d6\u6d88\u4efb\u52a1\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

                2.2.5\u00a0\u65f6\u95f4\u8f6e\u5b9a\u65f6\u5668\u7684\u4ee3\u7801\u6d4b\u8bd5<\/span><\/h4>\n

                \u901a\u8fc7\u4ee5\u4e0b\u6d4b\u8bd5\u4ee3\u7801，\u6d4b\u8bd5\u4ee3\u7801\u7684\u6b63\u786e\u6027<\/span><\/p>\n

                \/\/ \u6d4b\u8bd5\u7c7b
                \n\/\/ \u901a\u8fc7\u91ca\u653e\u8fc7\u7a0b\u6765\u770b\u4efb\u52a1\u6267\u884c\u60c5\u51b5
                \nclass Test
                \n{
                \nprivate:
                \npublic:
                \n Test() { std::cout << "\u6784\u9020" << std::endl; }
                \n ~Test() { std::cout << "\u6790\u6784" << std::endl; }
                \n};<\/p>\n

                void DelTest(Test *t)
                \n{
                \n delete t;
                \n}<\/p>\n

                int main()
                \n{
                \n TimerWheel tw;<\/p>\n

                Test *t = new Test();
                \n tw.TimerAdd(8, 5, std::bind(DelTest, t));
                \n for (int i = 0; i < 5; i++)
                \n {
                \n sleep(1);<\/p>\n

                tw.TimerRefresh(8); \/\/ \u5237\u65b0\u5b9a\u65f6\u4efb\u52a1
                \n tw.RunTimerTask(); \/\/ \u5411\u540e\u79fb\u52a8\u79d2\u9488
                \n std::cout << "\u5237\u65b0\u4e86\u4e00\u4e0b\u5b9a\u65f6\u4efb\u52a1，\u91cd\u65b0\u9700\u89815s\u624d\u4f1a\u88ab\u9500\u6bc1" << std::endl;
                \n }
                \n tw.TimerCancel(8);
                \n while (1)
                \n {
                \n std::cout << "———————–" << std::endl;
                \n sleep(1);
                \n tw.RunTimerTask(); \/\/ \u5411\u540e\u79fb\u52a8\u6307\u9488
                \n }<\/p>\n

                return 0;
                \n} <\/p>\n

                2.3 \u6b63\u5219\u5e93\u7684\u7b80\u5355\u4f7f\u7528<\/span><\/h3>\n

                2.3.1 \u6b63\u5219\u8868\u8fbe\u5f0f\u57fa\u672c\u8ba4\u8bc6<\/span><\/h4>\n

                \u6b63\u5219\u8868\u8fbe\u5f0f\u5c31\u662f\u4e00\u79cd\u5b57\u7b26\u4e32\u5339\u914d\u89c4\u5219\u3002\u6b63\u5219\u5e93\u5c31\u662f\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e00\u5957\u63a5\u53e3，\u8ba9\u6211\u4eec\u4f7f\u7528\u6b63\u5219\u5339\u914d\u529f\u80fd\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u80fd\u591f\u7b80\u5316HTTP\u8bf7\u6c42\u7684\u89e3\u6790\u8fc7\u7a0b（\u4e3b\u8981\u51cf\u8f7b\u7a0b\u5e8f\u5458\u7684\u5de5\u4f5c\u8d1f\u62c5），\u8ba9\u5f00\u53d1\u7684HTTP\u7ec4\u4ef6\u5e93\u66f4\u6613\u4f7f\u7528\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f，\u8fd9\u79cd\u65b9\u5f0f\u867d\u7136\u63d0\u9ad8\u4e86\u5f00\u53d1\u6548\u7387，\u4f46\u5728\u5904\u7406\u901f\u5ea6\u4e0a\u4f1a\u7565\u900a\u4e8e\u76f4\u63a5\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u3002<\/span><\/p>\n

                <regex> – C++ Reference<\/p>\n

                \u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u51fd\u6570<\/span><\/h5>\n

                std::regex_match \u529f\u80fd：\u7cbe\u786e\u5339\u914d\u6574\u4e2a\u5b57\u7b26\u4e32 \u53c2\u6570：<\/span><\/p>\n

                bool regex_match(
                \n const std::string& str, \/\/ \u5f85\u5339\u914d\u5b57\u7b26\u4e32
                \n std::smatch& matches, \/\/ \u5b58\u50a8\u5339\u914d\u7ed3\u679c
                \n const std::regex& pattern, \/\/ \u6b63\u5219\u8868\u8fbe\u5f0f
                \n std::regex_constants::match_flag_type flags = std::regex_constants::match_default
                \n); <\/p>\n

                HTTP \u4f7f\u7528\u573a\u666f：\u5339\u914d\u5b8c\u6574\u8bf7\u6c42\u884c（\u5982\u00a0GET \/index.html HTTP\/1.1）<\/span><\/p>\n

                std::regex_search \u529f\u80fd：\u5728\u5b57\u7b26\u4e32\u4e2d\u641c\u7d22\u5b50\u5339\u914d \u53c2\u6570：\u540c\u00a0regex_match HTTP \u4f7f\u7528\u573a\u666f：\u63d0\u53d6\u8bf7\u6c42\u5934\u4e2d\u7684\u952e\u503c\u5bf9（\u5982\u00a0Host: www.example.com）<\/span><\/p>\n

                \u793a\u4f8b：<\/span><\/p>\n

                #include <iostream>
                \n#include <string>
                \n#include <regex><\/p>\n

                int main()
                \n{
                \n std::string str = "\/numbers\/1234";
                \n \/\/ \u4ee5numbers\u4f5c\u4e3a\u8d77\u59cb\u5b57\u7b26\u4e32，\u6570\u5b57\u662f\\\\d+(\u591a\u52a0\u4e00\u4e2a\\\\，\u8f6c\u4e49)
                \n \/\/ \u5339\u914d\u4ee5\/numbers\/\u8d77\u59cb，\u540e\u8fb9\u8ddf\u4e86\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u5b57\u5b57\u7b26\u7684\u5b57\u7b26\u4e32，\u5e76\u4e14\u5728\u5339\u914d\u7684\u8fc7\u7a0b\u4e2d\u63d0\u53d6\u8fd9\u4e2a\u5339\u914d\u5230\u7684\u6570\u5b57\u5b57\u7b26\u4e32
                \n std::regex e("\/numbers\/(\\\\\\\\d+)");
                \n std::smatch matches;<\/p>\n

                bool ret = std::regex_match(str, matches, e);
                \n if (ret == false)
                \n {
                \n return -1;
                \n }
                \n for (auto &s : matches)
                \n {
                \n std::cout << s << std::endl;
                \n }
                \n return 0;
                \n} <\/p>\n

                \u8f93\u51fa：<\/span><\/p>\n

                \/numbers\/1234
                \n1234 <\/p>\n

                2.3.2 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u8bf7\u6c42\u65b9\u6cd5<\/span><\/h4>\n

                HTTP\u8bf7\u6c42\u884c\u683c\u5f0f： GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1\\\\r\\\\n\u00a0<\/span><\/span><\/p>\n

                \u793a\u4f8b：\u200b\u200b\u200b\u200b\u200b<\/span>\u8bf7\u6c42\u65b9\u6cd5\u7684\u5339\u914d<\/span><\/span><\/p>\n

                （GET|HEAD|POST|PUT|DELETE），\u8868\u793a\u5339\u914d\u5e76\u63d0\u53d6\u5176\u4e2d\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u4e32<\/span><\/span><\/p>\n

                #include <iostream>
                \n#include <string>
                \n#include <regex><\/p>\n

                int main()
                \n{
                \n std::string str = "GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1";
                \n std::smatch matches;
                \n \/\/ \u8bf7\u6c42\u65b9\u6cd5\u7684\u5339\u914d:GET HEAD POST PUT DELETE
                \n std::regex e("(GET|HEAD|POST|PUT|DELETE) .*");
                \n bool ret = std::regex_match(str, matches, e);
                \n if (ret == false)
                \n {
                \n std::cout << "\u672a\u627e\u5230\\\\n";
                \n return -1;
                \n }
                \n for (auto &s : matches)
                \n {
                \n std::cout << s << std::endl;
                \n }
                \n return 0;
                \n} <\/p>\n

                \u8f93\u51fa：<\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1
                \nGET <\/p>\n

                2.3.3 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u8bf7\u6c42\u8def\u5f84<\/span><\/h4>\n

                \u793a\u4f8b：<\/span>（[^?]*）<\/span><\/span><\/p>\n

                [^?]\u8868\u793a\u5339\u914d\u4e00\u4e2a\u975e?\u5b57\u7b26，\u540e\u8fb9*\u4ee3\u8868\u5339\u914d0\u6b21\u6216\u591a\u6b21（+\u8868\u793a\u5339\u914d1\u6b21\u6216\u591a\u6b21）<\/span><\/span><\/p>\n

                std::regex e("(GET|HEAD|POST|PUT|DELETE) ([^?]*) .*"); <\/p>\n

                \u8f93\u51fa：<\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1
                \nGET
                \n\/pupu's_blog\/login <\/p>\n

                2.3.4 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u67e5\u8be2\u5b57\u7b26\u4e32<\/span><\/h4>\n

                \u793a\u4f8b：<\/span>\\\\\\\\?(.*) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/span><\/p>\n

                \\\\\\\\?\u8868\u793a\u539f\u59cb\u7684？\u5b57\u7b26，\u540e\u8fb9\u7684(.*)\u8868\u793a\u63d0\u53d6?\u4e4b\u540e\u7684\u4efb\u610f\u5b57\u7b260\u6b21\u6216\u591a\u6b21，\u76f4\u5230\u9047\u5230\u7a7a\u683c<\/span><\/span><\/p>\n

                std::regex e("(GET|HEAD|POST|PUT|DELETE) ([^?]*)\\\\\\\\?(.*) .*"); <\/p>\n

                \u8f93\u51fa：<\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1
                \nGET
                \n\/pupu's_blog\/login
                \nuser=pupu&passwd=12312 <\/p>\n

                2.3.5 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u534f\u8bae\u7248\u672c<\/span><\/h4>\n

                \u793a\u4f8b：<\/span>(HTTP\/1\\\\\\\\.[01])<\/span><\/span><\/p>\n

                [01]\u8868\u793a\u5339\u914d\u7684\u662f\u91cc\u8fb9\u768401\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26<\/span><\/span><\/p>\n

                std::regex e("(GET|HEAD|POST|PUT|DELETE) ([^?]*)\\\\\\\\?(.*) (HTTP\/1\\\\\\\\.[01]).*"); <\/p>\n

                \u8f93\u51fa：<\/span><\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1
                \nGET
                \n\/pupu's_blog\/login
                \nuser=pupu&passwd=12312
                \nHTTP\/1.1 <\/p>\n

                2.3.6 \u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6 HTTP \u5143\u7d20\u7ec6\u8282\u5b8c\u5584<\/span><\/h4>\n
                \u60c5\u51b51：\u6240\u7ed9\u5b57\u7b26\u4e32\u540e\u8fb9\u8ddf\u4e86\\\\r\\\\n，\u7528\u4ee5\u4e0a\u7684e，\u65e0\u6cd5\u63d0\u53d6\u51fa\u5b57\u7b26\u4e32<\/span><\/h5>\n

                std::string str = "GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1\\\\r\\\\n"; <\/p>\n

                \u5982\u679c：（\\\\n|\\\\r\\\\n）<\/span><\/p>\n

                \u8f93\u51fa\u7ed3\u679c：<\/span><\/p>\n

                \"\"\u200b<\/p>\n

                \u5f97\u5230\u8fd9\u6837\u7684\u7ed3\u679c\u5e76\u4e0d\u662f\u6211\u4eec\u7684\u76ee\u7684，\u6211\u4eec\u7684\u76ee\u7684\u662f\u8fc7\u6ee4\u6389\\\\r\\\\n：<\/span><\/p>\n

                \u4f7f\u7528：<\/span>（?:\\\\n|\\\\r\\\\n）<\/span><\/span><\/p>\n

                \u8f93\u51fa\u7ed3\u679c：（\u5206\u6790\u7684\u4e32\u540e\u8fb9\u8ddf\u7684\u662f\\\\n\u6216\u8005\\\\r\\\\n）<\/span><\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1<\/p>\n

                GET
                \n\/pupu's_blog\/login
                \nuser=pupu&passwd=12312
                \nHTTP\/1.1 <\/p>\n

                \u4f46\u5982\u679c，\u5206\u6790\u7684\u4e32\u540e\u8fb9\u6ca1\u6709<\/span>\\\\r\\\\n\u6216\u8005\\\\n<\/span>：\u5c31\u8f93\u51fa\u5931\u8d25<\/span><\/p>\n

                \u89e3\u51b3\u529e\u6cd5：<\/span>（?:\\\\n|\\\\r\\\\n)?<\/span><\/span><\/p>\n

                (?:\\\\n|\\\\r\\\\n)? : (?: …) \u8868\u793a\u5339\u914d\u67d0\u4e2a\u683c\u5f0f\u5b57\u7b26\u4e32，\u4f46\u662f\u4e0d\u63d0\u53d6\u4ed6，\u6700\u540e\u7684?\u8868\u793a\u7684\u662f\u5339\u914d\u524d\u8fb9\u7684\u8868\u8fbe\u5f0f0\u6b21\u62161\u6b21<\/span><\/span><\/p>\n

                std::regex e("(GET|HEAD|POST|PUT|DELETE) ([^?]*)\\\\\\\\?(.*) (HTTP\/1\\\\\\\\.[01])(?:\\\\n|\\\\r\\\\n)?");<\/p>\n

                \u8f93\u51fa\u7ed3\u679c：<\/span><\/p>\n

                GET \/pupu's_blog\/login?user=pupu&passwd=12312 HTTP\/1.1
                \nGET
                \n\/pupu's_blog\/login
                \nuser=pupu&passwd=12312
                \nHTTP\/1.1 <\/p>\n

                \u60c5\u51b52：\u6240\u7ed9\u5b57\u7b26\u4e32\u6839\u672c\u6ca1\u6709\u67e5\u8be2\u5b57\u7b26\u4e32<\/span>?user=pupu&passwd=12312<\/span><\/h5>\n

                \u7531\u73b0\u6709\u7684e，\u65e0\u6cd5\u8f93\u51fa<\/span><\/p>\n

                \u89e3\u51b3\u529e\u6cd5：<\/span>(?:\\\\\\\\?(.*))?<\/span><\/p>\n

                \u5339\u914d\u4e00\u4e2a\u53ef\u9009\u7684\u95ee\u53f7（?），\u5982\u679c\u95ee\u53f7\u5b58\u5728，\u5219\u6355\u83b7\u95ee\u53f7\u540e\u7684\u6240\u6709\u5185\u5bb9（\u5305\u62ec\u7a7a\u5185\u5bb9）\u4f5c\u4e3a\u4e00\u4e2a\u5206\u7ec4\u3002<\/span><\/p>\n

                std::regex e("(GET|HEAD|POST|PUT|DELETE) ([^?]*)(?:\\\\\\\\?(.*))? (HTTP\/1\\\\\\\\.[01])(?:\\\\n|\\\\r\\\\n)?"); <\/p>\n

                \u8f93\u51fa：<\/span><\/p>\n

                GET \/pupu's_blog\/login HTTP\/1.1
                \nGET
                \n\/pupu's_blog\/login<\/p>\n

                HTTP\/1.1 <\/p>\n

                2.4 \u5b9e\u73b0\u901a\u7528\u7684any\u7c7b\u578b：<\/span><\/h3>\n
                  \n
                • \u6bcf\u4e2aConnection\u90fd\u9700\u8981\u7ba1\u7406\u7f51\u7edc\u8fde\u63a5，\u8fd9\u6700\u7ec8\u90fd\u4f1a\u6d89\u53ca\u5e94\u7528\u5c42\u534f\u8bae\u7684\u5904\u7406\u3002\u56e0\u6b64，Connection\u4e2d\u9700\u8981\u914d\u7f6e\u4e00\u4e2a\u534f\u8bae\u5904\u7406\u4e0a\u4e0b\u6587\u6765\u63a7\u5236\u5904\u7406\u6d41\u7a0b\u3002\u8003\u8651\u5230\u5e94\u7528\u5c42\u534f\u8bae\u79cd\u7c7b\u7e41\u591a，\u4e3a\u907f\u514d\u8026\u5408，<\/span>\u8fd9\u4e2a\u534f\u8bae\u89e3\u6790\u4e0a\u4e0b\u6587\u4e0d\u5e94\u504f\u5411\u7279\u5b9a\u534f\u8bae，\u800c\u5e94\u8be5\u80fd\u591f\u5bb9\u7eb3\u4efb\u610f\u534f\u8bae\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f，\u8fd9\u5c31\u9700\u8981\u4e00\u4e2a\u901a\u7528\u7684\u6570\u636e\u7c7b\u578b\u6765\u5b58\u50a8\u4e0d\u540c\u7684\u6570\u636e\u7ed3\u6784\u3002<\/span><\/li>\n
                • \u5728C\u8bed\u8a00\u4e2d，\u901a\u7528\u7c7b\u578b\u53ef\u901a\u8fc7void*\u5b9e\u73b0\u3002\u800c\u5728C++\u4e2d，boost\u5e93\u548cC++17\u90fd\u63d0\u4f9b\u4e86<\/span>any<\/span>\u8fd9\u4e00\u7075\u6d3b\u7684\u7c7b\u578b\u3002\u5982\u9700\u63d0\u9ad8\u4ee3\u7801\u53ef\u79fb\u690d\u6027\u5e76\u51cf\u5c11\u7b2c\u4e09\u65b9\u5e93\u4f9d\u8d56，\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528C++17\u7684any\u7279\u6027\u6216\u81ea\u884c\u5b9e\u73b0\u3002<\/span><\/li>\n<\/ul>\n

                  2.4.1\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u8bbe\u8ba1\u601d\u60f3<\/span><\/h4>\n

                  \u8bbe\u8ba1\u5b9e\u73b0\u4e00\u4e2aany\u7c7b<\/span><\/p>\n

                  \u662f\u4e00\u4e2a\u5bb9\u5668，\u5bb9\u5668\u4e2d\u53ef\u4ee5\u4fdd\u5b58\u5404\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e<\/span><\/p>\n

                  \u89e3\u51b3\u65b9\u6848：<\/span><\/p>\n

                  1.\u6a21\u7248–\u4e0d\u53ef\u7528<\/span><\/p>\n

                  template <class T>
                  \nclass Any
                  \n{
                  \nprivate:
                  \n T _content;
                  \n}; <\/p>\n

                  \u5b9e\u4f8b\u5316\u5bf9\u8c61\u7684\u65f6\u5019，\u5fc5\u987b\u6307\u5b9a\u5bb9\u5668\u4fdd\u5b58\u7684\u6570\u636e\u7c7b\u578b： Any<int> a;<\/span><\/p>\n

                  \u6211\u4eec\u9700\u8981\u7684\u662f：\u76f4\u63a5\u7528Any a；a = 10，a = "abcd"….<\/span><\/p>\n

                  2.\u8bbe\u8ba1\u5d4c\u5957\u7c7b，\u7c7b\u578b\u64e6\u9664(Type Erasure)\u6280\u672f\u7684\u6838\u5fc3\u601d\u60f3，\u5141\u8bb8\u5728\u5355\u4e2a\u5bb9\u5668\u4e2d\u5b58\u50a8\u4efb\u610f\u7c7b\u578b\u7684\u503c，<\/span><\/p>\n

                  \u591a\u6001\u5b58\u50a8\u67b6\u6784，\u57fa\u7c7b\u00a0holder\u00a0\u4f5c\u4e3a\u62bd\u8c61\u63a5\u53e3\u6a21\u677f\u5b50\u7c7b，placeholder<T>\u00a0\u5b58\u50a8\u5177\u4f53\u7c7b\u578b\u503c<\/span><\/p>\n

                  \u5728Any\u7c7b\u4e2d\u5b58\u50a8\u4e86holder\u7c7b\u7684\u6307\u9488\u3002\u5f53\u9700\u8981\u4fdd\u5b58\u6570\u636e\u65f6，Any\u5bb9\u5668\u53ea\u9700\u901a\u8fc7placeholder\u5b50\u7c7b\u5b9e\u4f8b\u5316\u4e00\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684\u5b50\u7c7b\u5bf9\u8c61，\u7531\u8be5\u5b50\u7c7b\u5bf9\u8c61\u6765\u5b9e\u9645\u5b58\u50a8\u6570\u636e\u3002<\/span><\/p>\n

                  \"\"<\/p>\n

                  \u200b<\/p>\n

                  2.4.2\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u7ed3\u6784\u8bbe\u8ba1<\/span><\/h4>\n

                  \u6838\u5fc3\u8bbe\u8ba1\u601d\u60f3<\/span><\/p>\n

                  \u7c7b\u578b\u64e6\u9664：\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u6307\u5411\u6a21\u677f\u6d3e\u751f\u7c7b，\u64e6\u9664\u5177\u4f53\u7c7b\u578b\u4fe1\u606f<\/span><\/p>\n

                  \u591a\u6001\u514b\u9686：\u901a\u8fc7\u865a\u51fd\u6570\u5b9e\u73b0\u6df1\u62f7\u8d1d<\/span><\/p>\n

                  \u7c7b\u578b\u5b89\u5168\u8bbf\u95ee：\u8fd0\u884c\u65f6\u68c0\u67e5\u7c7b\u578b\u5339\u914d<\/span><\/p>\n

                  class Any
                  \n{
                  \nprivate:
                  \n class holder
                  \n {<\/p>\n

                  public:
                  \n virtual ~holder() {}
                  \n virtual std::type_info type() = 0;
                  \n virtual holder *clone() = 0;
                  \n };
                  \n template <class T>
                  \n class placeholder : holder
                  \n {
                  \n public:
                  \n placeholder(const T &val) _val(val) {}
                  \n \/\/ \u83b7\u53d6\u5b50\u7c7b\u5bf9\u8c61\u4fdd\u5b58\u7684\u6570\u636e\u7c7b\u578b
                  \n std::type_info type() override;
                  \n \/\/ \u9488\u5bf9\u5f53\u524d\u7684\u5bf9\u8c61\u81ea\u8eab，\u514b\u9686\u51fa\u4e00\u4e2a\u65b0\u7684\u5b50\u7c7b\u5bf9\u8c61
                  \n holder *clone() override;
                  \n };<\/p>\n

                  holder *_content; \/\/ \u5728new\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\u7684\u65f6\u5019\u6307\u5b9a\u7c7b\u578b，\u8ba9\u7236\u7c7b\u6307\u5411\u8fd9\u4e2a\u5b50\u7c7b
                  \npublic:
                  \n Any();
                  \n template <class T>
                  \n Any(const T &val);
                  \n Any(const Any &other);
                  \n ~Any();<\/p>\n

                  \/\/ \u8fd4\u56de\u5728\u5b50\u7c7b\u5bf9\u8c61\u4e2d\u4fdd\u5b58\u7684\u6570\u636e\u7684\u6307\u9488
                  \n template <class T>
                  \n T *get();
                  \n \/\/ \u8d4b\u503c\u8fd0\u7b97\u7b26\u7684\u91cd\u8f7d\u51fd\u6570
                  \n template <class T>
                  \n Any &operator=(const T &val);<\/p>\n

                  Any &operator=(const Any &other);
                  \n}; <\/p>\n

                  \n

                  2.4.3\u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u529f\u80fd\u5b9e\u73b0<\/span><\/h4>\n

                  #include <iostream>
                  \n#include <typeinfo>
                  \n#include <cassert>
                  \n#include <string>
                  \nclass Any
                  \n{
                  \nprivate:
                  \n class holder
                  \n {<\/p>\n

                  public:
                  \n virtual ~holder() {}
                  \n virtual const std::type_info &type() = 0;
                  \n \/\/ \u6df1\u62f7\u8d1d\u652f\u6301：\u591a\u6001\u514b\u9686\u786e\u4fdd\u590d\u5236\u5b8c\u6574\u5bf9\u8c61
                  \n virtual holder *clone() = 0;
                  \n };
                  \n template <class T>
                  \n class placeholder : public holder
                  \n {
                  \n public:
                  \n placeholder(const T &val) : _val(val) {}
                  \n \/\/ \u83b7\u53d6\u5b50\u7c7b\u5bf9\u8c61\u4fdd\u5b58\u7684\u6570\u636e\u7c7b\u578b
                  \n const std::type_info &type() override
                  \n {
                  \n return typeid(T);
                  \n }<\/p>\n

                  \/\/ \u9488\u5bf9\u5f53\u524d\u7684\u5bf9\u8c61\u81ea\u8eab，\u514b\u9686\u51fa\u4e00\u4e2a\u65b0\u7684\u5b50\u7c7b\u5bf9\u8c61
                  \n holder *clone() override
                  \n {
                  \n return new placeholder(_val);
                  \n }<\/p>\n

                  public:
                  \n T _val;
                  \n };
                  \n \/\/ \u6307\u5411\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u901a\u7528\u63a5\u53e3
                  \n holder *_content; \/\/ \u5728new\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\u7684\u65f6\u5019\u6307\u5b9a\u7c7b\u578b，\u8ba9\u7236\u7c7b\u6307\u5411\u8fd9\u4e2a\u5b50\u7c7b<\/p>\n

                  public:
                  \n \/\/ \u65e0\u53c2\u6784\u9020
                  \n Any() : _content(nullptr)
                  \n {
                  \n }
                  \n template <class T>
                  \n \/\/ \u901a\u7528\u6784\u9020
                  \n Any(const T &val) : _content(new placeholder<T>(val))
                  \n {
                  \n }
                  \n \/\/ \u62f7\u8d1d\u6784\u9020
                  \n Any(const Any &other) : _content(other._content ? other._content->clone() : nullptr)
                  \n {
                  \n }
                  \n ~Any()
                  \n {
                  \n delete _content;
                  \n }
                  \n \/\/&\u4e3a\u4e86\u8fdb\u884c\u4e00\u4e2a\u8fde\u7eed\u7684\u4ea4\u6362
                  \n Any &swap(Any &other)
                  \n {
                  \n std::swap(_content, other._content);
                  \n return *this;
                  \n }<\/p>\n

                  \/\/ \u8fd4\u56de\u5728\u5b50\u7c7b\u5bf9\u8c61\u4e2d\u4fdd\u5b58\u7684\u6570\u636e\u7684\u6307\u9488
                  \n template <class T>
                  \n T *get()
                  \n {
                  \n if (!_content)
                  \n return nullptr;
                  \n \/\/ \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u7c7b\u578b\u5fc5\u987b\u548c\u4fdd\u5b58\u7684\u6570\u636e\u7c7b\u578b\u4e00\u81f4
                  \n assert(typeid(T) == _content->type());
                  \n \/\/ \u5411\u4e0b\u8f6c\u578b\u83b7\u53d6\u5b58\u50a8\u7684\u503c
                  \n return &static_cast<placeholder<T> *>(_content)->_val;
                  \n }
                  \n \/\/ \u8d4b\u503c\u8fd0\u7b97\u7b26\u7684\u91cd\u8f7d\u51fd\u6570
                  \n template <class T>
                  \n Any &operator=(const T &val)
                  \n {
                  \n \/\/ \u4e3aval\u6784\u9020\u4e00\u4e2a\u4e34\u65f6\u7684\u901a\u7528\u5bb9\u5668，\u7136\u540e\u4e0e\u5f53\u524d\u5bb9\u5668\u81ea\u8eab\u8fdb\u884c\u6307\u9488\u4ea4\u6362，\u4e34\u65f6\u5bf9\u8c61\u91ca\u653e\u7684\u65f6\u5019，\u539f\u5148\u4fdd\u5b58\u7684\u6570\u636e\u4e5f\u5c31\u88ab\u91ca\u653e
                  \n Any(val).swap(*this); \/\/ \u521b\u5efa\u4e34\u65f6\u5bf9\u8c61\u5e76\u4ea4\u6362
                  \n return *this;
                  \n }<\/p>\n

                  Any &operator=(const Any &other)
                  \n {
                  \n Any(other).swap(*this); \/\/ \u62f7\u8d1d\u6784\u9020\u4e34\u65f6\u5bf9\u8c61\u5e76\u4ea4\u6362<\/p>\n

                  return *this;
                  \n }
                  \n}; <\/p>\n

                  \u7c7b\u7ed3\u6784\u5206\u6790\u00a0<\/span><\/p>\n

                  \"\"<\/p>\n

                  \u200b<\/p>\n

                  \u6ce8\u610f\u6a21\u677f\u6d3e\u751f\u7c7b placeholder\u6d3e\u751f\u7c7b：<\/span><\/p>\n

                    \n
                  • \n

                    \u5173\u952e\u70b9：\u5fc5\u987b\u4f7f\u7528\u00a0public\u00a0\u7ee7\u627f\u57fa\u7c7b holder<\/span><\/p>\n<\/li>\n<\/ul>\n

                    2.4.4 \u901a\u7528\u7c7b\u578b\u5bb9\u5668any\u7c7b\u529f\u80fd\u6d4b\u8bd5<\/span><\/h4>\n

                    \u793a\u4f8b1：<\/span><\/p>\n

                    class Test
                    \n{
                    \npublic:
                    \n Test()
                    \n {
                    \n std::cout << "\u6784\u9020" << std::endl;
                    \n }
                    \n Test(const Test &t)
                    \n {
                    \n std::cout << "\u62f7\u8d1d\u6784\u9020" << std::endl;
                    \n }
                    \n ~Test()
                    \n {
                    \n std::cout << "\u6790\u6784" << std::endl;
                    \n }
                    \n};<\/p>\n

                    int main()
                    \n{
                    \n Any a;
                    \n {
                    \n Test t;
                    \n a = t;
                    \n }<\/p>\n

                    a = 10;
                    \n int *pa = a.get<int>();
                    \n std::cout << *pa << std::endl;
                    \n a = std::string("nihao");
                    \n std::string *ps = a.get<std::string>();
                    \n std::cout << *ps << std::endl;<\/p>\n

                    return 0;
                    \n} <\/p>\n

                    \u8fd0\u884c\u7ed3\u679c：<\/span><\/p>\n

                    \u6784\u9020
                    \n\u62f7\u8d1d\u6784\u9020
                    \n\u6790\u6784
                    \n\u6790\u6784
                    \n10
                    \nnihao <\/p>\n

                    \u00a0\u793a\u4f8b2：<\/span><\/p>\n

                    int main()
                    \n{
                    \n {
                    \n Any a;<\/p>\n

                    Test t;
                    \n a = t;
                    \n }
                    \n while (1)
                    \n {
                    \n sleep(1);
                    \n }
                    \n return 0;
                    \n} <\/p>\n

                    \u8fd0\u884c\u7ed3\u679c：<\/span><\/p>\n

                    \"\"\u200b<\/p>\n

                    \u672a\u6765\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528boost\u5e93\\\\c++17\\\\\u81ea\u5df1\u5b9e\u73b0\u7684Any\u00a0<\/span><\/p>\n

                    2.4.5 \u901a\u7528\u7c7b\u578b\u5bb9\u5668C++17\u4e2dany\u7684\u4f7f\u7528<\/span><\/h4>\n

                    std::any – cppreference.cn – C++\u53c2\u8003\u624b\u518c<\/p>\n

                    \u4f7f\u7528：<\/span><\/p>\n

                    \"\"\u200b<\/p>\n<\/p>\n

                    \u7ed3\u8bed：<\/span><\/p>\n

                    \u00a0 \u00a0 \u00a0 \u00a0\u968f\u7740\u8fd9\u7bc7\u535a\u5ba2\u63a5\u8fd1\u5c3e\u58f0，\u6211\u8877\u5fc3\u5e0c\u671b\u6211\u6240\u5206\u4eab\u7684\u5185\u5bb9\u80fd\u4e3a\u4f60\u5e26\u6765\u4e00\u4e9b\u542f\u53d1\u548c\u5e2e\u52a9\u3002\u5b66\u4e60\u548c\u7406\u89e3\u7684\u8fc7\u7a0b\u5f80\u5f80\u5145\u6ee1\u6311\u6218，\u4f46\u6b63\u662f\u8fd9\u4e9b\u6311\u6218\u8ba9\u6211\u4eec\u4e0d\u65ad\u6210\u957f\u548c\u8fdb\u6b65\u3002\u6211\u5728\u51c6\u5907\u8fd9\u7bc7\u6587\u7ae0\u65f6，\u4e5f\u6df1\u523b\u4f53\u4f1a\u5230\u4e86\u5b66\u4e60\u4e0e\u5206\u4eab\u7684\u4e50\u8da3\u3002 \u00a0 \u00a0<\/span><\/p>\n

                    \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5728\u6b64，\u6211\u8981\u7279\u522b\u611f\u8c22\u6bcf\u4e00\u4f4d\u9605\u8bfb\u5230\u8fd9\u91cc\u7684\u4f60\u3002\u662f\u4f60\u7684\u5173\u6ce8\u548c\u652f\u6301，\u7ed9\u4e88\u4e86\u6211\u6301\u7eed\u5199\u4f5c\u548c\u5206\u4eab\u7684\u52a8\u529b\u3002\u6211\u6df1\u77e5，\u65e0\u8bba\u6211\u5728\u67d0\u4e2a\u9886\u57df\u6709\u591a\u5c11\u89c1\u89e3，\u90fd\u79bb\u4e0d\u5f00\u5927\u5bb6\u7684\u9f13\u52b1\u4e0e\u6307\u6b63\u3002\u56e0\u6b64，\u5982\u679c\u4f60\u5728\u9605\u8bfb\u8fc7\u7a0b\u4e2d\u6709\u4efb\u4f55\u7591\u95ee\u3001\u5efa\u8bae\u6216\u662f\u53d1\u73b0\u4e86\u6587\u7ae0\u4e2d\u7684\u4e0d\u8db3\u4e4b\u5904，\u90fd\u6b22\u8fce\u4f60\u6177\u6168\u8d50\u6559\u3002<\/span><\/p>\n

                    \u00a0 \u00a0 \u00a0 \u00a0 \u4f60\u7684\u6bcf\u4e00\u6761\u53cd\u9988\u90fd\u662f\u6211\u524d\u8fdb\u8def\u4e0a\u7684\u5b9d\u8d35\u8d22\u5bcc\u3002\u540c\u65f6，\u6211\u4e5f\u975e\u5e38\u671f\u5f85\u80fd\u591f\u5f97\u5230\u4f60\u7684\u70b9\u8d5e\u3001\u6536\u85cf，\u5173\u6ce8\u8fd9\u5c06\u662f\u5bf9\u6211\u83ab\u5927\u7684\u652f\u6301\u548c\u9f13\u52b1\u3002\u5f53\u7136，\u6211\u66f4\u671f\u5f85\u7684\u662f\u80fd\u591f\u6301\u7eed\u4e3a\u4f60\u5e26\u6765\u6709\u4ef7\u503c\u7684\u5185\u5bb9\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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