{"id":48596,"date":"2025-07-30T12:48:10","date_gmt":"2025-07-30T04:48:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48596.html"},"modified":"2025-07-30T12:48:10","modified_gmt":"2025-07-30T04:48:10","slug":"%e3%80%90%e9%ab%98%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%e3%80%91%e5%a4%9a%e8%b7%af%e5%a4%8d%e7%94%a8%e7%9a%84%e6%80%bb%e7%bb%93-eventfd-timerfd","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48596.html","title":{"rendered":"\u3010\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u3011\u591a\u8def\u590d\u7528\u7684\u603b\u7ed3 eventfd timerfd"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u591a\u8def\u590d\u7528<\/li>\n<li>\n<ul>\n<li>select<\/li>\n<li>\n<ul>\n<li>\u8fc7\u7a0b<\/li>\n<li>demo<\/li>\n<li>\u7f3a\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>poll<\/li>\n<li>\n<ul>\n<li>\u8fc7\u7a0b<\/li>\n<li>demo<\/li>\n<li>\u4f18\u7f3a<\/li>\n<\/ul>\n<\/li>\n<li>epoll<\/li>\n<li>\n<ul>\n<li>\u8fc7\u7a0b<\/li>\n<li>demo<\/li>\n<li>\u4f18\u70b9<\/li>\n<li>\u9762\u8bd5\u9898<\/li>\n<li>\n<ul>\n<li>1. \u603b\u8fde\u63a5\u591a\u3001\u6d3b\u8dc3\u8fde\u63a5\u5c11&#xff1a;epoll \u66f4\u9ad8\u6548<\/li>\n<li>2. \u603b\u8fde\u63a5\u5c11\u3001\u6d3b\u8dc3\u8fde\u63a5\u591a&#xff1a;select \u53ef\u80fd\u66f4\u4f18<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u57fa\u4e8e\u65f6\u95f4\u8f6e\u7684\u5b9a\u65f6\u5668<\/li>\n<li>eventfd timerfd<\/li>\n<\/ul>\n<h2>\u591a\u8def\u590d\u7528<\/h2>\n<h3>select<\/h3>\n<h4>\u8fc7\u7a0b<\/h4>\n<p>\u8fc7\u7a0b&#xff1a;\u4e09\u6b21\u5faa\u73af \u4e24\u6b21\u7528\u6237\u6001&lt;\u2013&gt; \u5185\u6838\u6001\u7684\u62f7\u8d1d&#xff0c;\u4e14select\u8fd4\u56de\u65f6\u4f1a\u76f4\u63a5\u4fee\u6539fd_set&#xff0c;\u610f\u5473\u7740\u4e0b\u6b21\u4f7f\u7528\u65f6\u4ecd\u8981\u6267\u884c\u6b65\u9aa41<\/p>\n<li>\u5c06\u9700\u8981\u5173\u5fc3\u7684fdArr\u8bbe\u7f6e\u8fdbfd_set<\/li>\n<li>\u8c03\u7528select&#xff0c;\u5f85\u76d1\u542c\u7684fd_set\u4ece\u7528\u6237\u7a7a\u95f4\u590d\u5236\u5230\u5185\u6838\u7a7a\u95f4<\/li>\n<li>select\u904d\u5386fd_array&#xff0c;\u5224\u65ad\u65f6\u95f4\u5c31\u7eea<\/li>\n<li>select\u8fd4\u56de&#xff0c;\u5185\u6838\u628a\u5c31\u7eea\u7684 FD \u96c6\u5408\u590d\u5236\u56de\u7528\u6237\u7a7a\u95f4<\/li>\n<li>\u904d\u5386fdArr\u548cfd_set&#xff0c;\u5224\u65ad\u54ea\u4e9bfd\u5c31\u7eea<\/li>\n<h4>demo<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> listensock <span class=\"token operator\">&#061;<\/span> _listenSock<span class=\"token punctuation\">.<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    fd_array<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> listensock<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        fd_set rfds<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>rfds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> maxfd <span class=\"token operator\">&#061;<\/span> fd_array<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ loop one<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> defaultFd<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>rfds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>maxfd <span class=\"token operator\">&lt;<\/span> fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                maxfd <span class=\"token operator\">&#061;<\/span> fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;max fd update, max fd is: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> maxfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/null&#xff1a;\u963b\u585e\u7b49\u5f85; {0, 0}&#xff1a;\u975e\u963b\u585e; \u5176\u4f59&#xff1a;\u6307\u5b9a\u65f6\u957f<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>maxfd <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>rfds<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/*&amp;timeout*\/<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>n<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> <span class=\"token number\">0<\/span><span class=\"token operator\">:<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;time out, timeout: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> timeout<span class=\"token punctuation\">.<\/span>tv_sec <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;.&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> timeout<span class=\"token punctuation\">.<\/span>tv_usec <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><br \/>\n                cerr <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;select error&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a new link!!!!!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span>rfds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span>fd_set <span class=\"token operator\">&amp;<\/span>rfds<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/loop two<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> defaultFd<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>rfds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> _listenSock<span class=\"token punctuation\">.<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token function\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8fde\u63a5\u7ba1\u7406\u5668<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token function\">Recver<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bfb\u4e8b\u4ef6\u7ba1\u7406\u5668<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u7f3a\u70b9<\/h4>\n<li>\u80fd\u591f\u76d1\u89c6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u91cf\u6709\u4e0a\u9650<\/li>\n<li>\u6027\u80fd\u4f4e\u4e0b<\/li>\n<h3>poll<\/h3>\n<h4>\u8fc7\u7a0b<\/h4>\n<li>\u5728\u7528\u6237\u6001\u7ef4\u62a4\u4e00\u4e2a\u7ed3\u6784\u4f53\u6570\u7ec4&#xff0c;\u5b58\u50a8\u9700\u8981\u5173\u5fc3\u7684fd\u53ca\u5176\u611f\u5174\u8da3\u7684\u4e8b\u4ef6\u3002<\/li>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">pollfd<\/span> fds<span class=\"token punctuation\">[<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\nfds<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\nfds<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> POLLIN<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u76d1\u542c\u53ef\u8bfb\u4e8b\u4ef6<\/span><\/p>\n<li>\u8c03\u7528 poll &#xff0c;\u62f7\u8d1d&#xff1a;pollfd\u6570\u7ec4\u4ece\u7528\u6237\u7a7a\u95f4 \u2192 \u5185\u6838\u7a7a\u95f4<\/li>\n<li>\u5185\u6838\u7ebf\u6027\u626b\u63cfpollfd\u6570\u7ec4&#xff0c;\u68c0\u67e5\u5e76\u66f4\u65b0\u6bcf\u4e2aFD\u7684\u5c31\u7eea\u72b6\u6001&#xff1a;poll\u4e3a\u6bcf\u4e2a\u611f\u5174\u8da3\u7684fd\u6ce8\u518c\u4e00\u4e2a\u7b49\u5f85\u4e8b\u4ef6&#xff0c;\u8fd9\u4e9b\u7b49\u5f85\u4e8b\u4ef6\u4f1a\u88ab\u6302\u63a5\u5230\u5185\u6838\u4e2d\u76f8\u5e94\u7684\u7b49\u5f85\u961f\u5217\u4e0a<\/li>\n<li>\u5185\u6838\u5c06\u4fee\u6539\u540e\u7684pollfd\u6570\u7ec4\u4ece\u5185\u6838\u7a7a\u95f4\u590d\u5236\u56de\u7528\u6237\u7a7a\u95f4<\/li>\n<li>\u904d\u5386\u7ed3\u6784\u4f53\u6570\u7ec4&#xff0c;\u5224\u65ad\u54ea\u4e9bfd\u5c31\u7eea<\/li>\n<h4>demo<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    _event_fds<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    _event_fds<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> POLLIN<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3000<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 3s<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span>_event_fds<span class=\"token punctuation\">,<\/span> fd_num_max<span class=\"token punctuation\">,<\/span> timeout<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>n<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> <span class=\"token number\">0<\/span><span class=\"token operator\">:<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;time out&#8230; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><br \/>\n                cerr <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;poll error&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a new link!!!!!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ loop<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> defaultFd<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>revents <span class=\"token operator\">&amp;<\/span> POLLIN<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token function\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8fde\u63a5\u7ba1\u7406\u5668<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token function\">Recver<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ non listenfd<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u4f18\u7f3a<\/h4>\n<li>\u89e3\u9664\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u91cf\u4e0a\u9650<\/li>\n<li>\u5206\u79bb\u7528\u6237\u4e8b\u4ef6\u548c\u5185\u6838\u8fd4\u56de\u7684\u4e8b\u4ef6&#xff0c;\u4e0d\u7528\u6bcf\u6b21\u4f7f\u7528\u524d\u90fd\u5faa\u73af\u8bbe\u7f6e\u611f\u5174\u8da3\u7684fd<\/li>\n<li>\u4ecd\u5b58\u5728\u62f7\u8d1d\u548c\u5faa\u73af\u7684\u5f00\u9500<\/li>\n<h3>epoll<\/h3>\n<h4>\u8fc7\u7a0b<\/h4>\n<li>\u521b\u5efa epoll \u6a21\u578b&#xff1a;\u521b\u5efa\u7ea2\u9ed1\u6811\u3001\u5c31\u7eea\u961f\u5217&#xff0c;\u6ce8\u518c\u5e95\u5c42\u56de\u8c03\u673a\u5236\u3002<\/li>\n<p><span class=\"token keyword\">int<\/span> epfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_create<\/span><span class=\"token punctuation\">(<\/span>size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ Linux 2.6.8 \u540e size \u53c2\u6570\u88ab\u5ffd\u7565&#xff0c;\u586b\u4efb\u610f\u6b63\u6570\u5373\u53ef<\/span><\/p>\n<p>\u7ea2\u9ed1\u6811\u7528\u4e8e\u5b58\u653e\u901a\u8fc7epoll_ctl\u65b9\u6cd5\u5411epoll\u5bf9\u8c61\u4e2d\u6dfb\u52a0\u8fdb\u6765\u7684\u4e8b\u4ef6&#xff0c;\u6240\u6709\u6dfb\u52a0\u5230epoll\u6a21\u578b\u4e2d\u7684\u4e8b\u4ef6\u90fd\u4f1a\u4e0e\u8bbe\u5907(\u7f51\u5361)\u9a71\u52a8\u7a0b\u5e8f\u5efa\u7acb\u56de\u8c03\u5173\u7cfb\u3002 \u5f53\u54cd\u5e94\u7684\u4e8b\u4ef6\u53d1\u751f\u65f6\u4f1a\u8c03\u7528\u56de\u8c03\u65b9\u6cd5\u3002\u8fd9\u4e2a\u56de\u8c03\u65b9\u6cd5\u5728\u5185\u6838\u4e2d\u53ebep_poll_callback&#xff0c;\u5b83\u4f1a\u5c06\u53d1\u751f\u7684\u4e8b\u4ef6\u6dfb\u52a0\u5230rdlist\u53cc\u94fe\u8868\u5373fd\u5c31\u7eea\u961f\u5217\u4e2d\u3002<\/p>\n<p>\u5728epoll\u4e2d&#xff0c;\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u4e8b\u4ef6&#xff0c;\u90fd\u4f1a\u5efa\u7acb\u4e00\u4e2aepitem\u7ed3\u6784\u4f53\u3010\u7ea2\u9ed1\u6811\u7ed3\u70b9\u3011<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epitem<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">rb_node<\/span>  rbn<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u7ea2\u9ed1\u6811\u8282\u70b9  <\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">list_head<\/span>    rdllink<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53cc\u5411\u94fe\u8868\u8282\u70b9  <\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_filefd<\/span>  ffd<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/\u4e8b\u4ef6\u53e5\u67c4\u4fe1\u606f  <\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">eventpoll<\/span> <span class=\"token operator\">*<\/span>ep<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/\u6307\u5411\u5176\u6240\u5c5e\u7684eventpoll\u5bf9\u8c61  <\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> event<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u671f\u5f85\u53d1\u751f\u7684\u4e8b\u4ef6\u7c7b\u578b  <\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ fd event \u5c31\u7eea\u961f\u5217 \u6240\u5904\u7684epoll\u6a21\u578b \u6240\u5904\u7684\u7ea2\u9ed1\u6811\u7ed3\u70b9<\/span><\/p>\n<li>\u6ce8\u518c\u76d1\u542c\u4e8b\u4ef6&#xff0c;\u7528\u6237\u7a7a\u95f4 \u2192 \u5185\u6838\u7a7a\u95f4&#xff0c;\u5c06\u4e8b\u4ef6\u6302\u8f7d\u5230\u7ea2\u9ed1\u6811\u5e76\u6ce8\u518c\u56de\u8c03\u673a\u5236<\/li>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> epfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> op<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> <span class=\"token operator\">*<\/span>event<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>op&#xff1a;\u64cd\u4f5c\u7c7b\u578b&#xff08;EPOLL_CTL_ADD\/MOD\/DEL&#xff09;\u3002<\/li>\n<li>fd&#xff1a;\u8981\u76d1\u542c\u7684 FD\u3002<\/li>\n<li>event&#xff1a;\u6307\u5b9a\u76d1\u542c\u7684\u4e8b\u4ef6\u7c7b\u578b&#xff08;\u5982 EPOLLIN\u3001EPOLLET&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> ev<span class=\"token punctuation\">;<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> EPOLLIN <span class=\"token operator\">|<\/span> EPOLLET<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u53ef\u8bfb\u4e8b\u4ef6 &#043; \u8fb9\u7f18\u89e6\u53d1\u6a21\u5f0f<\/span><br \/>\nev<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5c06 fd \u52a0\u5165 epoll \u5b9e\u4f8b<\/span><\/p>\n<li>\u7b49\u5f85\u4e8b\u4ef6\u53d1\u751f&#xff0c;epoll\u4f1a\u5c06\u5c31\u7eea\u7684\u4e8b\u4ef6\u653e\u5165\u5c31\u7eea\u961f\u5217&#xff0c;\u8c03\u7528epoll_wait\u65f6\u4ee5O(1)\u590d\u6742\u5ea6\u5224\u65ad\u662f\u5426\u5b58\u5728\u5c31\u7eea\u4e8b\u4ef6&#xff0c;\u4ee5O(N)\u590d\u6742\u5ea6\u5c06\u5c31\u7eea\u4e8b\u4ef6\u590d\u5236\u5230 events \u6570\u7ec4\u3002<\/li>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> epfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> <span class=\"token operator\">*<\/span>events<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> maxevents<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> timeout<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>events&#xff1a;\u7528\u4e8e\u5b58\u50a8\u5c31\u7eea FD \u7684\u6570\u7ec4&#xff08;\u7531\u7528\u6237\u5206\u914d&#xff09;\u3002<\/li>\n<li>maxevents&#xff1a;\u6700\u591a\u8fd4\u56de\u7684\u4e8b\u4ef6\u6570\u3002<\/li>\n<li>timeout&#xff1a;\u8d85\u65f6\u65f6\u95f4&#xff08;\u6beb\u79d2&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<li>\u5904\u7406\u5c31\u7eea\u4e8b\u4ef6&#xff0c;\u7528\u6237\u904d\u5386 events \u6570\u7ec4&#xff0c;\u5904\u7406\u6bcf\u4e2a\u5c31\u7eea\u7684 FD&#xff1a;<\/li>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> events<span class=\"token punctuation\">[<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> nfds <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_wait<\/span><span class=\"token punctuation\">(<\/span>epfd<span class=\"token punctuation\">,<\/span> events<span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u963b\u585e\u7b49\u5f85<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> nfds<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&amp;<\/span> EPOLLIN<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5904\u7406\u53ef\u8bfb\u4e8b\u4ef6<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&amp;<\/span> EPOLLOUT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5904\u7406\u53ef\u5199\u4e8b\u4ef6<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>demo<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5c06listensock\u6dfb\u52a0\u5230epoll\u4e2d -&gt; listensock\u548c\u4ed6\u5173\u5fc3\u7684\u4e8b\u4ef6 \u6dfb\u52a0\u5230\u5185\u6838epoll\u6a21\u578b\u4e2drb_tree<\/span><br \/>\n    _epollerPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EpllerUpdate<\/span><span class=\"token punctuation\">(<\/span>EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span> _listenSocketPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ET_EVENT_IN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> revs<span class=\"token punctuation\">[<\/span>num<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> _epollerPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EpollerWait<\/span><span class=\"token punctuation\">(<\/span>revs<span class=\"token punctuation\">,<\/span> num<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u6709\u4e8b\u4ef6\u5c31\u7eea<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Debug<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;event happened, first event fd is : %d&#034;<\/span><span class=\"token punctuation\">,<\/span> revs<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span>revs<span class=\"token punctuation\">,<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;time out &#8230;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><br \/>\n            <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Error<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;epll wait error&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">Dispatcher<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> revs<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> num<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> num<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">uint32_t<\/span> events <span class=\"token operator\">&#061;<\/span> revs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> revs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>events <span class=\"token operator\">&amp;<\/span> ET_EVENT_IN<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u5ba2\u6237\u8054\u8fde\u63a5\u8bfb\u53d6\u4e8b\u4ef6\u5c31\u7eea<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&#061;&#061;<\/span> _listenSocketPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">getSocketFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token function\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">else<\/span> <span class=\"token comment\">\/\/ \u666e\u901a\u8bfb\u53d6\u4e8b\u4ef6\u5c31\u7eea<\/span><br \/>\n                <span class=\"token function\">Recver<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/ else if (events &amp; EVENT_OUT){}<\/span><br \/>\n        <span class=\"token comment\">\/\/ else{}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u83b7\u53d6\u4e86\u4e00\u4e2a\u65b0\u8fde\u63a5<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string clientip<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> clientport<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sock <span class=\"token operator\">&#061;<\/span> _listenSocketPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>clientip<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>clientport<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>sock <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4e0d\u80fd\u76f4\u63a5\u8bfb\u53d6 \u539f\u56e0select\/poll\u5df2\u8bb2<\/span><br \/>\n        _epollerPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EpllerUpdate<\/span><span class=\"token punctuation\">(<\/span>EPOLL_CTL_ADD<span class=\"token punctuation\">,<\/span> sock<span class=\"token punctuation\">,<\/span> ET_EVENT_IN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;get a new link, client info&#064; %s:%d&#034;<\/span><span class=\"token punctuation\">,<\/span> clientip<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> clientport<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Recver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ 1.\u4e0d\u4e00\u5b9a\u662f\u5b8c\u6574\u7684\u62a5\u6587<\/span><br \/>\n    <span class=\"token comment\">\/\/ 2.\u8bfb\u5230\u90e8\u5206\u62a5\u6587 \u4e0b\u6b21\u7684Recver()\u51fd\u6570\u4e2dbuffer\u662f\u5c40\u90e8\u53d8\u91cf <\/span><br \/>\n    <span class=\"token comment\">\/\/ A\u62a5\u6587\u5982\u679c\u53d1\u4e24\u6b21\u8fc7\u6765 \u4e5f\u65e0\u6cd5\u62fc\u63a5\u6210\u5b8c\u6574\u62a5\u6587<\/span><br \/>\n    ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        buffer<span class=\"token punctuation\">[<\/span>n<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a messge: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> buffer <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>string echo_str <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;server echo $ &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        echo_str <span class=\"token operator\">&#043;&#061;<\/span> buffer<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> echo_str<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> echo_str<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;client quit, me too, close fd is : %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _epollerPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EpllerUpdate<\/span><span class=\"token punctuation\">(<\/span>EPOLL_CTL_DEL<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Warning<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;recv error: fd is : %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _epollerPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EpllerUpdate<\/span><span class=\"token punctuation\">(<\/span>EPOLL_CTL_DEL<span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u4f18\u70b9<\/h4>\n<p>\u5224\u65ad\u6709\u6ca1\u6709\u4e8b\u4ef6\u5c31\u7eea\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1)\u3002\u3010\u53ea\u9700\u8981\u770b\u961f\u5217\u662f\u5426\u4e3a\u7a7a\u3011 \u83b7\u53d6\u5c31\u7eea\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)&#xff0c;\u9700\u8981\u5c06\u5c31\u7eea\u961f\u5217\u4e2d\u7684\u8282\u70b9\u4e00\u4e2a\u4e00\u4e2a\u62f7\u8d1d\u5230\u5e94\u7528\u5c42\u3002 fd \u548c event \u6ca1\u6709\u4e0a\u9650&#xff0c;\u8be5\u7ea2\u9ed1\u6811\u6709\u591a\u5927\u7531\u64cd\u4f5c\u7cfb\u7edf\u627f\u8f7d\u3002 \u4e0d\u9700\u8981\u5728\u7528\u6237\u5c42\u7531\u7528\u6237\u7ef4\u62a4\u4e00\u4e2a\u6570\u7ec4\u8fd9\u6837\u7684\u6570\u636e\u7ed3\u6784\u6765\u7ba1\u7406\u6240\u6709\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u53ca\u5176\u8981\u5173\u5fc3\u7684\u4e8b\u4ef6\u3002 epoll_wait() \u7684\u8fd4\u56de\u503c n\u8868\u793a\u6709 n \u4e2a fd \u5c31\u7eea\u4e86\u3002\u8be5\u63a5\u53e3\u4f1a\u5c06\u5df2\u7ecf\u5c31\u7eea\u7684\u8282\u70b9\u653e\u5165\u8f93\u51fa\u578b\u53c2\u6570 events &#xff0c;\u6240\u4ee5\u5c31\u7eea\u4e8b\u4ef6\u662f\u8fde\u7eed\u7684&#xff0c;\u6709 n \u4e2a&#xff01;\u4e0a\u5c42\u7528\u6237\u5904\u7406\u5df2\u7ecf\u5c31\u7eea\u7684\u4e8b\u4ef6\u4e0d\u9700\u8981\u50cf\u4ee5\u524d\u4e00\u6837\u68c0\u6d4b\u6709\u54ea\u4e9b fd \u662f\u975e\u6cd5\u7684&#xff0c;\u54ea\u4e9b\u662f\u6ca1\u6709\u5c31\u7eea\u7684\u4e86&#xff0c;\u53ea\u9700\u8981\u6839\u636e\u8fd4\u56de\u503c n&#xff0c;\u904d\u5386 events \u5373\u53ef&#xff01;<\/p>\n<h4>\u9762\u8bd5\u9898<\/h4>\n<h5>1. \u603b\u8fde\u63a5\u591a\u3001\u6d3b\u8dc3\u8fde\u63a5\u5c11&#xff1a;epoll \u66f4\u9ad8\u6548<\/h5>\n<p>epoll \u7684\u6838\u5fc3\u4f18\u52bf\u662f \u201c\u4e8b\u4ef6\u9a71\u52a8\u201d&#043;\u201c\u5185\u6838\u7ef4\u62a4\u72b6\u6001\u201d&#xff1a;<\/p>\n<ul>\n<li>\u6ce8\u518c\u9636\u6bb5&#xff1a;epoll \u901a\u8fc7 epoll_ctl \u5c06\u6240\u6709\u9700\u8981\u76d1\u542c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff08;FD&#xff09;\u6ce8\u518c\u5230\u5185\u6838\u7684\u7ea2\u9ed1\u6811\u4e2d&#xff0c;\u540e\u7eed\u65e0\u9700\u91cd\u590d\u4f20\u9012\u6574\u4e2a FD \u96c6\u5408&#xff08;\u4ec5\u9700\u8c03\u7528 epoll_wait \u7b49\u5f85\u4e8b\u4ef6&#xff09;\u3002<\/li>\n<li>\u4e8b\u4ef6\u901a\u77e5&#xff1a;\u5185\u6838\u4f1a\u4e3b\u52a8\u8bb0\u5f55\u6d3b\u8dc3\u7684 FD \u5e76\u653e\u5165\u5c31\u7eea\u961f\u5217&#xff0c;epoll_wait \u76f4\u63a5\u8fd4\u56de\u5c31\u7eea\u7684 FD \u5217\u8868&#xff08;\u65e0\u9700\u7528\u6237\u904d\u5386\u6240\u6709 FD&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u5f53\u603b\u8fde\u63a5\u591a\u4f46\u6d3b\u8dc3\u5c11&#xff08;\u5982\u767e\u4e07\u7ea7\u8fde\u63a5\u4e2d\u4ec5\u51e0\u767e\u4e2a\u6d3b\u8dc3&#xff09;\u65f6&#xff1a;<\/p>\n<ul>\n<li>epoll \u53ea\u9700\u5904\u7406\u5c11\u91cf\u6d3b\u8dc3 FD&#xff0c;\u65e0\u9700\u904d\u5386\u5168\u90e8\u8fde\u63a5&#xff0c;\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(\u6d3b\u8dc3\u6570)&#xff0c;\u6548\u7387\u6781\u9ad8\u3002<\/li>\n<li>\u800c select\/poll \u6bcf\u6b21\u8c03\u7528\u90fd\u9700\u5c06\u6240\u6709 FD \u4ece\u7528\u6237\u6001\u62f7\u8d1d\u5230\u5185\u6838\u6001&#xff0c;\u5e76\u7531\u5185\u6838\u904d\u5386\u5168\u90e8 FD \u68c0\u67e5\u72b6\u6001&#xff08;\u65f6\u95f4\u590d\u6742\u5ea6 O(\u603b\u8fde\u63a5\u6570)&#xff09;&#xff0c;\u603b\u8fde\u63a5\u6570\u8d8a\u591a&#xff0c;\u5f00\u9500\u8d8a\u5927\u3002<\/li>\n<\/ul>\n<h5>2. \u603b\u8fde\u63a5\u5c11\u3001\u6d3b\u8dc3\u8fde\u63a5\u591a&#xff1a;select \u53ef\u80fd\u66f4\u4f18<\/h5>\n<p>select \u7684\u52a3\u52bf\u5728\u201c\u603b\u8fde\u63a5\u591a\u201d\u65f6\u88ab\u653e\u5927&#xff0c;\u4f46\u5728\u201c\u603b\u8fde\u63a5\u5c11\u201d\u65f6&#xff0c;\u5176 \u201c\u7b80\u5355\u76f4\u63a5\u201d \u7684\u7279\u70b9\u53cd\u800c\u53ef\u80fd\u66f4\u9ad8\u6548&#xff1a;<\/p>\n<ul>\n<li>select \u65e0\u9700\u63d0\u524d\u6ce8\u518c FD&#xff08;\u6bcf\u6b21\u8c03\u7528\u76f4\u63a5\u4f20\u5165 FD \u96c6\u5408&#xff09;&#xff0c;\u7701\u53bb\u4e86 epoll \u4e2d epoll_create\u3001epoll_ctl \u7b49\u989d\u5916\u7684\u7cfb\u7edf\u8c03\u7528\u548c\u5185\u6838\u7ea2\u9ed1\u6811\u7ef4\u62a4\u6210\u672c\u3002<\/li>\n<li>\u5f53\u6d3b\u8dc3\u8fde\u63a5\u591a&#xff08;\u63a5\u8fd1\u603b\u8fde\u63a5\u6570&#xff09;\u65f6&#xff0c;epoll \u7684\u201c\u5185\u6838\u7b5b\u9009\u6d3b\u8dc3 FD\u201d\u4f18\u52bf\u88ab\u524a\u5f31&#xff08;\u56e0\u4e3a\u5927\u90e8\u5206 FD \u90fd\u662f\u6d3b\u8dc3\u7684&#xff0c;\u7b5b\u9009\u6210\u672c\u63a5\u8fd1\u904d\u5386\u5168\u90e8&#xff09;&#xff0c;\u800c select \u7701\u53bb\u4e86\u7ea2\u9ed1\u6811\u64cd\u4f5c\u7684\u5f00\u9500&#xff0c;\u53cd\u800c\u53ef\u80fd\u66f4\u5feb\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982&#xff1a;\u82e5\u603b\u8fde\u63a5\u4ec5 10 \u4e2a\u4e14 8 \u4e2a\u6d3b\u8dc3&#xff0c;select \u4e00\u6b21\u62f7\u8d1d &#043; \u904d\u5386 10 \u4e2a FD \u7684\u6210\u672c&#xff0c;\u53ef\u80fd\u4f4e\u4e8e epoll \u7ef4\u62a4\u7ea2\u9ed1\u6811 &#043; \u8c03\u7528 epoll_ctl \u7684\u6210\u672c\u3002<\/p>\n<h5>\u603b\u7ed3<\/h5>\n<p>\u603b\u8fde\u63a5\u591a&#xff0c;\u8bbe\u7f6e\u4e00\u6b21\u5173\u6ce8\u5c31\u884c&#xff0c;\u6d3b\u8dc3\u8fde\u63a5\u5c11&#xff0c;\u4e8b\u4ef6\u56de\u8c03\u5373\u53ef\u3002select\u5728\u603b\u8fde\u63a5\u591a\u65f6\u7684\u5faa\u73af\u548c\u62f7\u8d1d\u5b58\u5728\u6781\u5927\u5f00\u9500\u3002<\/p>\n<p>\u603b\u8fde\u63a5\u5c11&#xff0c;\u6d3b\u8dc3\u8fde\u63a5\u591a&#xff0c;\u5faa\u73af\u548c\u62f7\u8d1d\u5747\u6709\u6548\u4e14\u4e0d\u7528\u7ef4\u62a4\u7ea2\u9ed1\u6811&#xff0c;\u5c31\u7eea\u961f\u5217&#xff0c;\u56de\u8c03\u673a\u5236\u7b49\u590d\u6742\u673a\u5236\u3002<\/p>\n<h2>\u57fa\u4e8e\u65f6\u95f4\u8f6e\u7684\u5b9a\u65f6\u5668<\/h2>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;vector&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unordered_map&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;cstdint&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;functional&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;memory&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token comment\">\/\/ g&#043;&#043; timerWheel.cpp -o timerWheel -std&#061;c&#043;&#043;11<\/span><br \/>\n<span class=\"token keyword\">using<\/span> TaskFunc <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> ReleaseFunc <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TimerTask<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">uint64_t<\/span> _id<span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1ID<\/span><br \/>\n    <span class=\"token keyword\">uint32_t<\/span> _expiration<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1\u7684\u8d85\u65f6\u65f6\u95f4<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> _isValid<span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1\u662f\u5426\u6709\u6548<\/span><\/p>\n<p>    TaskFunc _onProcess<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1\u5230\u671f \u4efb\u52a1\u6267\u884c\u56de\u8c03<\/span><br \/>\n    ReleaseFunc _removeFromTable<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1\u91ca\u653e \u5220\u9664\u54c8\u5e0c\u8868\u8bb0\u5f55<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint64_t<\/span> id<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint32_t<\/span> expireTime<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> TaskFunc <span class=\"token operator\">&amp;<\/span>task_cb<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span> <span class=\"token function\">_id<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_expiration<\/span><span class=\"token punctuation\">(<\/span>expireTime<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_onProcess<\/span><span class=\"token punctuation\">(<\/span>task_cb<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_isValid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">TimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4efb\u52a1\u6709\u6548 \u5219\u6267\u884c\u4efb\u52a1<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_isValid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token function\">_onProcess<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4e0d\u8bba\u4efb\u52a1\u662f\u5426\u6709\u6548 \u90fd\u9700\u8981\u91ca\u653e\u54c8\u5e0c\u8868\u4e2d\u7684\u5b9a\u65f6\u4efb\u52a1\u8bb0\u5f55<\/span><br \/>\n        <span class=\"token function\">_removeFromTable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Cancel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _isValid <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">setRelease<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> ReleaseFunc <span class=\"token operator\">&amp;<\/span>removeFromTable<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _removeFromTable <span class=\"token operator\">&#061;<\/span> removeFromTable<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">uint32_t<\/span> <span class=\"token function\">getExpTime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> _expiration<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TimerWheel<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">using<\/span> Task_wp <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span>weak_ptr<span class=\"token operator\">&lt;<\/span>TimerTask<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">using<\/span> Task_sp <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span>shared_ptr<span class=\"token operator\">&lt;<\/span>TimerTask<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> _tick<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u79d2\u9488 \u79fb\u52a8\u5230\u54ea\u4e2a\u4f4d\u7f6e\u5c31\u6267\u884c\u8be5\u4f4d\u7f6e\u7684\u7279\u5b9a\u4e8b\u4ef6<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> _capacity<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u65f6\u95f4\u8f6e\u6700\u5927\u6570\u91cf\/\u6700\u5927\u5ef6\u8fdf\u65f6\u95f4<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>std<span class=\"token operator\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>Task_sp<span class=\"token operator\">&gt;&gt;<\/span> _wheel<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>unordered_map<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">uint64_t<\/span><span class=\"token punctuation\">,<\/span> Task_wp<span class=\"token operator\">&gt;<\/span> _timers<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Remove_Timers<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint64_t<\/span> id<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">!&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">erase<\/span><span class=\"token punctuation\">(<\/span>it<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">TimerWheel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span> <span class=\"token function\">_tick<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_capacity<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_wheel<\/span><span class=\"token punctuation\">(<\/span>_capacity<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">AddTimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint64_t<\/span> id<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint32_t<\/span> expireTime<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> TaskFunc <span class=\"token operator\">&amp;<\/span>task_cb<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        Task_sp <span class=\"token function\">taskPtr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token function\">TimerTask<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> expireTime<span class=\"token punctuation\">,<\/span> task_cb<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        taskPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">setRelease<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>TimerWheel<span class=\"token operator\">::<\/span>Remove_Timers<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> pos <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>_tick <span class=\"token operator\">&#043;<\/span> expireTime<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> _capacity<span class=\"token punctuation\">;<\/span><br \/>\n        _wheel<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>taskPtr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _timers<span class=\"token punctuation\">[<\/span>id<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">Task_wp<\/span><span class=\"token punctuation\">(<\/span>taskPtr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5237\u65b0\/\u5ef6\u8fdf\u5b9a\u65f6\u4efb\u52a1<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">RefreshTimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint64_t<\/span> id<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u901a\u8fc7\u4fdd\u5b58\u7684\u5b9a\u65f6\u5668\u5bf9\u8c61\u7684weak_ptr\u6784\u9020\u4e00\u4e2ashared_ptr\u51fa\u6765&#xff0c;\u6dfb\u52a0\u5230\u8f6e\u5b50\u4e2d<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">&#061;&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b9a\u65f6\u4efb\u52a1\u4e0d\u5b58\u5728<\/span><\/p>\n<p>        Task_sp taskPtr <span class=\"token operator\">&#061;<\/span> it<span class=\"token operator\">-&gt;<\/span>second<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> expireTime <span class=\"token operator\">&#061;<\/span> taskPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">getExpTime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> pos <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>_tick <span class=\"token operator\">&#043;<\/span> expireTime<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> _capacity<span class=\"token punctuation\">;<\/span><br \/>\n        _wheel<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>taskPtr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">TimerCancel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint64_t<\/span> id<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">&#061;&#061;<\/span> _timers<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6b64\u5904wp\u53d8\u4e3asp\u4f1a\u589e\u52a0\u5f15\u7528\u8ba1\u6570<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4f46\u662ftaskPtr\u5728\u8be5\u51fd\u6570\u8c03\u7528\u5b8c\u540e\u4f1a\u6790\u6784\u5f15\u7528\u8ba1\u6570&#8211;<\/span><br \/>\n        Task_sp taskPtr <span class=\"token operator\">&#061;<\/span> it<span class=\"token operator\">-&gt;<\/span>second<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>taskPtr<span class=\"token punctuation\">)<\/span><br \/>\n            taskPtr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Cancel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u79d2\u9488\u6bcf\u79d2\u8d70\u4e00\u6b65 \u8be5\u51fd\u6570\u6bcf\u79d2\u88ab\u6267\u884c\u4e00\u6b21<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">TickMove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _tick <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>_tick <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> _capacity<span class=\"token punctuation\">;<\/span><br \/>\n        _wheel<span class=\"token punctuation\">[<\/span>_tick<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">clear<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ clear\u8c03\u7528\u8be5\u65f6\u523b\u4e0b\u6240\u6709\u5b9a\u65f6\u4efb\u52a1\u6307\u9488\u7684\u6790\u6784 \u5373\u5f15\u7528\u8ba1\u6570&#8211;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8f93\u51fa\u67e5\u770b_timers<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">PrintTimers<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">auto<\/span> <span class=\"token operator\">&amp;<\/span>it <span class=\"token operator\">:<\/span> _timers<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;id: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> it<span class=\"token punctuation\">.<\/span>first <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">A<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u6784\u9020&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u6790\u6784&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Delete_APtr<\/span><span class=\"token punctuation\">(<\/span>A <span class=\"token operator\">*<\/span>pA<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> pA<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    A <span class=\"token operator\">*<\/span>pA <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    TimerWheel timerWheel<span class=\"token punctuation\">;<\/span><br \/>\n    timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddTimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1234<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>Delete_APtr<span class=\"token punctuation\">,<\/span> pA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">RefreshTimerTask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1234<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5b9a\u65f6\u4efb\u52a1\u88ab\u5237\u65b0&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">TickMove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">PrintTimers<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">TimerCancel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1234<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">TickMove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        timerWheel<span class=\"token punctuation\">.<\/span><span class=\"token function\">PrintTimers<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>eventfd timerfd<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e20\u6b21\uff0c\u6536\u85cf13\u6b21\u3002\u672c\u6587\u5bf9\u6bd4\u4e86\u4e09\u79cdI\/O\u591a\u8def\u590d\u7528\u6280\u672f\uff1aselect\u3001poll\u548cepoll\u3002select\u901a\u8fc7fd_set\u76d1\u542c\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u4f46\u5b58\u5728\u62f7\u8d1d\u5f00\u9500\u548c\u6570\u91cf\u9650\u5236\uff1bpoll\u4f7f\u7528\u7ed3\u6784\u4f53\u6570\u7ec4\u6539\u8fdb\uff0c\u4f46\u4ecd\u9700\u904d\u5386\u6240\u6709fd\u3002epoll\u91c7\u7528\u7ea2\u9ed1\u6811\u548c\u5c31\u7eea\u961f\u5217\u5b9e\u73b0\u9ad8\u6548\u4e8b\u4ef6\u7ba1\u7406\uff0c\u901a\u8fc7\u56de\u8c03\u673a\u5236\u907f\u514d\u904d\u5386\uff0c\u6027\u80fd\u6700\u4f18\u3002\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cepoll\u9002\u5408\u9ad8\u5e76\u53d1\u573a\u666f\uff0cselect\/poll\u9002\u7528\u4e8e\u7b80\u5355\u9700\u6c42\u3002\u6bcf\u79cd\u6280\u672f\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u9009\u62e9\u9700\u6839\u636e\u5177\u4f53\u573a\u666f\u6743\u8861\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,192,43,211],"topic":[],"class_list":["post-48596","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-linux","tag-43","tag-211"],"yoast_head":"<!-- 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