{"id":108819,"date":"2026-09-22T18:24:52","date_gmt":"2026-09-22T10:24:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/108819.html"},"modified":"2026-09-22T18:24:52","modified_gmt":"2026-09-22T10:24:52","slug":"c%e4%bb%bf-muduo-%e9%ab%98%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%9apoller-%e4%b8%8e-channel-%e6%a8%a1%e5%9d%97%e8%81%94%e5%90%88%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/108819.html","title":{"rendered":"C++\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\uff1aPoller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790"},"content":{"rendered":"<h2>Poller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790&#xff1a;\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668&#xff08;Reactor \u96cf\u5f62&#xff09;<\/h2>\n<p>\u672c\u6587\u57fa\u4e8e\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u9879\u76ee\u4e2d\u7684 Poller \u4e0e Channel \u6a21\u5757\u6e90\u7801\u53ca\u6d4b\u8bd5\u4ee3\u7801&#xff0c;\u68b3\u7406\u4e24\u4e2a\u6a21\u5757\u7684\u804c\u8d23\u3001\u51fd\u6570\u8c03\u7528\u5173\u7cfb\u3001\u4e8b\u4ef6\u5904\u7406\u6d41\u7a0b\u4e0e\u6574\u4f53\u67b6\u6784\u3002<\/p>\n<hr \/>\n<h3>1. \u6a21\u5757\u6982\u89c8<\/h3>\n<p>\u5728 Reactor \u6a21\u578b\u4e2d&#xff0c;\u4e24\u4e2a\u6700\u6838\u5fc3\u7684\u57fa\u7840\u7ec4\u4ef6\u662f&#xff1a;<\/p>\n<ul>\n<li>Poller&#xff1a;\u5bf9 epoll \u7684\u5c01\u88c5&#xff0c;\u8d1f\u8d23\u76d1\u63a7\u6240\u6709 fd \u7684 I\/O \u4e8b\u4ef6\u3002<\/li>\n<li>Channel&#xff1a;\u5bf9\u4e00\u4e2a fd \u7684\u4e8b\u4ef6\u7ba1\u7406\u5355\u5143&#xff0c;\u4fdd\u5b58\u9700\u8981\u76d1\u63a7\u7684\u4e8b\u4ef6\u3001\u5b9e\u9645\u5c31\u7eea\u7684\u4e8b\u4ef6&#xff0c;\u4ee5\u53ca\u5404\u79cd\u4e8b\u4ef6\u56de\u8c03\u3002<\/li>\n<\/ul>\n<p>\u5b83\u4eec\u7684\u5173\u7cfb&#xff1a;<\/p>\n<p>Poller<br \/>\n \u2514\u2500\u2500 _channels: fd -&gt; Channel*<br \/>\n      \u251c\u2500\u2500 Channel(listenfd)   \/\/ \u76d1\u542c\u5957\u63a5\u5b57<br \/>\n      \u251c\u2500\u2500 Channel(connfd1)    \/\/ \u901a\u4fe1\u5957\u63a5\u5b57<br \/>\n      \u251c\u2500\u2500 Channel(connfd2)<br \/>\n      \u2514\u2500\u2500 &#8230;<\/p>\n<ul>\n<li>Poller \u901a\u8fc7 epoll_wait \u62ff\u5230\u5c31\u7eea\u4e8b\u4ef6\u3002<\/li>\n<li>\u6839\u636e\u5c31\u7eea\u4e8b\u4ef6\u7684 fd&#xff0c;\u5728 _channels \u4e2d\u627e\u5230\u5bf9\u5e94\u7684 Channel\u3002<\/li>\n<li>\u628a\u5c31\u7eea\u4e8b\u4ef6\u7c7b\u578b\u8bbe\u7f6e\u5230 Channel&#xff0c;\u52a0\u5165\u6d3b\u8dc3\u5217\u8868\u3002<\/li>\n<li>\u4e0a\u5c42\u904d\u5386\u6d3b\u8dc3\u5217\u8868&#xff0c;\u8c03\u7528 Channel::HandleEvent()\u3002<\/li>\n<li>HandleEvent() \u6839\u636e\u4e8b\u4ef6\u7c7b\u578b\u8c03\u7528\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u5c31\u662f Reactor \u7684\u201c\u4e8b\u4ef6\u5206\u53d1\u201d\u96cf\u5f62\u3002<\/p>\n<hr \/>\n<h3>2. Channel \u6a21\u5757\u8be6\u89e3<\/h3>\n<h4>2.1 \u7c7b\u5b9a\u4e49<\/h4>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Poller<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Channel<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> _fd<span class=\"token punctuation\">;<\/span><br \/>\n    Poller <span class=\"token operator\">*<\/span>_poller<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint32_t<\/span> _events<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5f53\u524d\u9700\u8981\u76d1\u63a7\u7684\u4e8b\u4ef6<\/span><br \/>\n    <span class=\"token keyword\">uint32_t<\/span> _revents<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5f53\u524d\u5b9e\u9645\u5c31\u7eea\u7684\u4e8b\u4ef6<\/span><\/p>\n<p>    <span class=\"token keyword\">using<\/span> EventCallback <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/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    EventCallback _read_callback<span class=\"token punctuation\">;<\/span><br \/>\n    EventCallback _write_callback<span class=\"token punctuation\">;<\/span><br \/>\n    EventCallback _error_callback<span class=\"token punctuation\">;<\/span><br \/>\n    EventCallback _close_callback<span class=\"token punctuation\">;<\/span><br \/>\n    EventCallback _event_callback<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\">Channel<\/span><span class=\"token punctuation\">(<\/span>Poller <span class=\"token operator\">*<\/span>poller<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span> <span class=\"token function\">_fd<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">_events<\/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\">_revents<\/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\">_poller<\/span><span class=\"token punctuation\">(<\/span>poller<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> <span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> _fd<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">uint32_t<\/span> <span class=\"token function\">Events<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> _events<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetREvents<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint32_t<\/span> events<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _revents <span class=\"token operator\">&#061;<\/span> events<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetReadCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> EventCallback <span class=\"token operator\">&amp;<\/span>cb<span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> _read_callback <span class=\"token operator\">&#061;<\/span> cb<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetWriteCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> EventCallback <span class=\"token operator\">&amp;<\/span>cb<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _write_callback <span class=\"token operator\">&#061;<\/span> cb<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetErrorCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> EventCallback <span class=\"token operator\">&amp;<\/span>cb<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _error_callback <span class=\"token operator\">&#061;<\/span> cb<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetCloseCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> EventCallback <span class=\"token operator\">&amp;<\/span>cb<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _close_callback <span class=\"token operator\">&#061;<\/span> cb<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">SetEventCallback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> EventCallback <span class=\"token operator\">&amp;<\/span>cb<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _event_callback <span class=\"token operator\">&#061;<\/span> cb<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">ReadAble<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>_events <span class=\"token operator\">&amp;<\/span> EPOLLIN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">WriteAble<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>_events <span class=\"token operator\">&amp;<\/span> EPOLLOUT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">EnableRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">|&#061;<\/span> EPOLLIN<span class=\"token punctuation\">;<\/span>  <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">EnableWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">|&#061;<\/span> EPOLLOUT<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&amp;&#061;<\/span> <span class=\"token operator\">~<\/span>EPOLLIN<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&amp;&#061;<\/span> <span class=\"token operator\">~<\/span>EPOLLOUT<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Remove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Update<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">HandleEvent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>2.2 \u6838\u5fc3\u6210\u5458<\/h4>\n<table>\n<tr>\u6210\u5458\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">_fd<\/td>\n<td align=\"left\">\u7ba1\u7406\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_poller<\/td>\n<td align=\"left\">\u6240\u5c5e\u7684 Poller&#xff0c;\u7528\u4e8e\u66f4\u65b0\/\u79fb\u9664\u76d1\u63a7<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_events<\/td>\n<td align=\"left\">\u5f53\u524d\u9700\u8981\u76d1\u63a7\u7684\u4e8b\u4ef6&#xff08;EPOLLIN\u3001EPOLLOUT \u7b49&#xff09;<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_revents<\/td>\n<td align=\"left\">epoll \u8fd4\u56de\u7684\u5b9e\u9645\u5c31\u7eea\u4e8b\u4ef6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_read_callback<\/td>\n<td align=\"left\">\u53ef\u8bfb\u4e8b\u4ef6\u56de\u8c03<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_write_callback<\/td>\n<td align=\"left\">\u53ef\u5199\u4e8b\u4ef6\u56de\u8c03<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_error_callback<\/td>\n<td align=\"left\">\u9519\u8bef\u4e8b\u4ef6\u56de\u8c03<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_close_callback<\/td>\n<td align=\"left\">\u8fde\u63a5\u65ad\u5f00\u56de\u8c03<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_event_callback<\/td>\n<td align=\"left\">\u4efb\u610f\u4e8b\u4ef6\u90fd\u4f1a\u8c03\u7528\u7684\u56de\u8c03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.3 \u4e8b\u4ef6\u76d1\u63a7\u7684\u589e\u5220\u6539<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">EnableRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">|&#061;<\/span> EPOLLIN<span class=\"token punctuation\">;<\/span>  <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">EnableWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">|&#061;<\/span> EPOLLOUT<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&amp;&#061;<\/span> <span class=\"token operator\">~<\/span>EPOLLIN<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&amp;&#061;<\/span> <span class=\"token operator\">~<\/span>EPOLLOUT<span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/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 keyword\">void<\/span> <span class=\"token function\">DisableAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token punctuation\">{<\/span> _events <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token function\">Update<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u4fee\u6539 _events \u540e&#xff0c;\u8c03\u7528 Update()\u3002<\/li>\n<li>Update() \u5b9a\u4e49\u5728\u7c7b\u5916&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Channel<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">Update<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> _poller<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">UpdateEvent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>UpdateEvent \u5185\u90e8\u6839\u636e\u662f\u5426\u5df2\u7ecf\u6dfb\u52a0\u8fc7&#xff0c;\u51b3\u5b9a EPOLL_CTL_ADD \u8fd8\u662f EPOLL_CTL_MOD\u3002<\/li>\n<\/ul>\n<h4>2.4 \u4e8b\u4ef6\u5904\u7406<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">HandleEvent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>_revents <span class=\"token operator\">&amp;<\/span> EPOLLIN<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span> <span class=\"token punctuation\">(<\/span>_revents <span class=\"token operator\">&amp;<\/span> EPOLLRDHUP<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span> <span class=\"token punctuation\">(<\/span>_revents <span class=\"token operator\">&amp;<\/span> EPOLLPRI<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_event_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_event_callback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_read_callback<span class=\"token punctuation\">)<\/span>  <span class=\"token function\">_read_callback<\/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\">if<\/span> <span class=\"token punctuation\">(<\/span>_revents <span class=\"token operator\">&amp;<\/span> EPOLLOUT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_event_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_event_callback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_write_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_write_callback<\/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>_revents <span class=\"token operator\">&amp;<\/span> EPOLLERR<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_event_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_event_callback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_error_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_error_callback<\/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>_revents <span class=\"token operator\">&amp;<\/span> EPOLLHUP<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_event_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_event_callback<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_close_callback<span class=\"token punctuation\">)<\/span> <span class=\"token function\">_close_callback<\/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 punctuation\">}<\/span><\/p>\n<ul>\n<li>\u8bfb\u4e8b\u4ef6\u5224\u65ad\u5305\u542b EPOLLIN\u3001EPOLLRDHUP\u3001EPOLLPRI\u3002<\/li>\n<li>\u5199\u4e8b\u4ef6\u3001\u9519\u8bef\u3001\u6302\u65ad\u4f7f\u7528 else if&#xff0c;\u4e00\u6b21\u53ea\u5904\u7406\u4e00\u4e2a\u201c\u53ef\u80fd\u91ca\u653e\u8fde\u63a5\u201d\u7684\u4e8b\u4ef6\u3002<\/li>\n<li>\u4efb\u610f\u4e8b\u4ef6\u56de\u8c03 _event_callback \u5728\u6bcf\u79cd\u4e8b\u4ef6\u524d\u90fd\u4f1a\u8c03\u7528&#xff0c;\u5e38\u7528\u4e8e\u5237\u65b0\u6d3b\u8dc3\u5ea6\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>3. Poller \u6a21\u5757\u8be6\u89e3<\/h3>\n<h4>3.1 \u7c7b\u5b9a\u4e49<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">MAX_EPOLLEVENTS<\/span> <span class=\"token expression\"><span class=\"token number\">1024<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Poller<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> _epfd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">epoll_event<\/span> _evs<span class=\"token punctuation\">[<\/span>MAX_EPOLLEVENTS<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>unordered_map<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span> Channel<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span> _channels<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\">Update<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> op<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><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> ev<span class=\"token punctuation\">;<\/span><br \/>\n        ev<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        ev<span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Events<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_ctl<\/span><span class=\"token punctuation\">(<\/span>_epfd<span class=\"token punctuation\">,<\/span> op<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><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">ERR_LOG<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;EPOLLCTL FAILED!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">abort<\/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 punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">bool<\/span> <span class=\"token function\">HasChannel<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _channels<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/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 keyword\">return<\/span> it <span class=\"token operator\">!&#061;<\/span> _channels<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 punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">Poller<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        _epfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">epoll_create<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_epfd <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">ERR_LOG<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;EPOLL CREATE FAILED!!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">abort<\/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 punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">UpdateEvent<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">bool<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">HasChannel<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            _channels<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">make_pair<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> channel<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 function\">Update<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">,<\/span> EPOLL_CTL_ADD<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 function\">Update<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">,<\/span> EPOLL_CTL_MOD<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\">RemoveEvent<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _channels<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">!&#061;<\/span> _channels<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> <span class=\"token punctuation\">{<\/span><br \/>\n            _channels<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><br \/>\n        <span class=\"token function\">Update<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">,<\/span> EPOLL_CTL_DEL<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\">Poll<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>Channel<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">*<\/span>active<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> _evs<span class=\"token punctuation\">,<\/span> MAX_EPOLLEVENTS<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>nfds <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>errno <span class=\"token operator\">&#061;&#061;<\/span> EINTR<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">ERR_LOG<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;EPOLL WAIT ERROR:%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">abort<\/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\">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\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _channels<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>_evs<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><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">assert<\/span><span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">!&#061;<\/span> _channels<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><span class=\"token punctuation\">;<\/span><br \/>\n            it<span class=\"token operator\">-&gt;<\/span>second<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetREvents<\/span><span class=\"token punctuation\">(<\/span>_evs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            active<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>it<span class=\"token operator\">-&gt;<\/span>second<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 punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>3.2 \u6838\u5fc3\u6210\u5458<\/h4>\n<table>\n<tr>\u6210\u5458\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">_epfd<\/td>\n<td align=\"left\">epoll \u5b9e\u4f8b fd&#xff0c;\u7531 epoll_create \u521b\u5efa<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_evs<\/td>\n<td align=\"left\">\u5c31\u7eea\u4e8b\u4ef6\u6570\u7ec4&#xff0c;epoll_wait \u628a\u4e8b\u4ef6\u586b\u5165\u8fd9\u91cc<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">_channels<\/td>\n<td align=\"left\">fd -&gt; Channel* \u6620\u5c04&#xff0c;\u7528\u4e8e\u5feb\u901f\u627e\u5230\u5c31\u7eea fd \u5bf9\u5e94\u7684 Channel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3.3 \u6838\u5fc3\u63a5\u53e3<\/h4>\n<table>\n<tr>\u63a5\u53e3\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">UpdateEvent(Channel*)<\/td>\n<td align=\"left\">\u6dfb\u52a0\u6216\u4fee\u6539\u76d1\u63a7\u4e8b\u4ef6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">RemoveEvent(Channel*)<\/td>\n<td align=\"left\">\u79fb\u9664\u76d1\u63a7\u4e8b\u4ef6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">Poll(std::vector&lt;Channel*&gt;*)<\/td>\n<td align=\"left\">\u7b49\u5f85\u4e8b\u4ef6\u5c31\u7eea&#xff0c;\u8fd4\u56de\u6d3b\u8dc3 Channel \u5217\u8868<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">Update(Channel*, int op)<\/td>\n<td align=\"left\">\u76f4\u63a5\u8c03\u7528 epoll_ctl<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">HasChannel(Channel*)<\/td>\n<td align=\"left\">\u5224\u65ad Channel \u662f\u5426\u5df2\u6dfb\u52a0\u76d1\u63a7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3.4 Poll \u5de5\u4f5c\u6d41\u7a0b<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Poll<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>Channel<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">*<\/span>active<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> _evs<span class=\"token punctuation\">,<\/span> MAX_EPOLLEVENTS<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 comment\">\/\/ &#8230;<\/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\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> _channels<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>_evs<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><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">assert<\/span><span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">!&#061;<\/span> _channels<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><span class=\"token punctuation\">;<\/span><br \/>\n        it<span class=\"token operator\">-&gt;<\/span>second<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetREvents<\/span><span class=\"token punctuation\">(<\/span>_evs<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        active<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>it<span class=\"token operator\">-&gt;<\/span>second<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<li>epoll_wait \u963b\u585e\u7b49\u5f85\u4e8b\u4ef6\u3002<\/li>\n<li>\u8fd4\u56de nfds&#xff0c;\u8868\u793a\u5c31\u7eea\u4e8b\u4ef6\u4e2a\u6570\u3002<\/li>\n<li>\u904d\u5386 _evs[0..nfds-1]\u3002<\/li>\n<li>\u6839\u636e data.fd \u5728 _channels \u4e2d\u627e\u5230\u5bf9\u5e94 Channel\u3002<\/li>\n<li>\u8c03\u7528 SetREvents \u8bbe\u7f6e\u5b9e\u9645\u5c31\u7eea\u4e8b\u4ef6\u3002<\/li>\n<li>\u628a Channel* \u52a0\u5165 active \u5217\u8868&#xff0c;\u4ea4\u7ed9\u4e0a\u5c42\u5904\u7406\u3002<\/li>\n<hr \/>\n<h3>4. \u8054\u5408\u5de5\u4f5c\u6d41\u7a0b\u4e0e\u51fd\u6570\u8c03\u7528\u5173\u7cfb<\/h3>\n<h4>4.1 \u6574\u4f53\u67b6\u6784\u56fe&#xff08;\u6587\u5b57\u7248&#xff09;<\/h4>\n<p>main<br \/>\n \u2502<br \/>\n \u251c\u2500 \u521b\u5efa Poller<br \/>\n \u251c\u2500 \u521b\u5efa\u76d1\u542c Socket&#xff0c;CreateServer<br \/>\n \u251c\u2500 \u521b\u5efa\u76d1\u542c Channel&#xff0c;\u7ed1\u5b9a\u5230 listenfd<br \/>\n \u2502    \u2514\u2500 SetReadCallback(Acceptor)<br \/>\n \u2502    \u2514\u2500 EnableRead()<br \/>\n \u2502         \u2514\u2500 Channel::Update()<br \/>\n \u2502              \u2514\u2500 Poller::UpdateEvent()<br \/>\n \u2502                   \u2514\u2500 epoll_ctl(ADD, listenfd, EPOLLIN)<br \/>\n \u2502<br \/>\n \u2514\u2500 while(1)<br \/>\n      \u251c\u2500 Poller::Poll(&amp;actives)<br \/>\n      \u2502    \u2514\u2500 epoll_wait()<br \/>\n      \u2502         \u2514\u2500 \u8fd4\u56de\u5c31\u7eea\u4e8b\u4ef6<br \/>\n      \u2502              \u2514\u2500 \u5bf9\u6bcf\u4e2a\u4e8b\u4ef6&#xff1a;\u67e5 _channels&#xff0c;SetREvents&#xff0c;\u52a0\u5165 actives<br \/>\n      \u2502<br \/>\n      \u2514\u2500 for each active Channel<br \/>\n           \u2514\u2500 Channel::HandleEvent()<br \/>\n                \u251c\u2500 \u8bfb\u4e8b\u4ef6 \u2192 _read_callback()<br \/>\n                \u251c\u2500 \u5199\u4e8b\u4ef6 \u2192 _write_callback()<br \/>\n                \u251c\u2500 \u9519\u8bef   \u2192 _error_callback()<br \/>\n                \u2514\u2500 \u6302\u65ad   \u2192 _close_callback()<\/p>\n<h4>4.2 \u76d1\u542c Channel \u7684\u8bfb\u4e8b\u4ef6\u6d41\u7a0b<\/h4>\n<li>listenfd \u53ef\u8bfb&#xff0c;epoll_wait \u8fd4\u56de\u3002<\/li>\n<li>Poller::Poll \u628a\u76d1\u542c Channel \u52a0\u5165 actives\u3002<\/li>\n<li>\u4e0a\u5c42\u8c03\u7528 Channel::HandleEvent()\u3002<\/li>\n<li>\u8bfb\u4e8b\u4ef6\u89e6\u53d1&#xff0c;\u8c03\u7528 _read_callback&#xff0c;\u5373 Acceptor\u3002<\/li>\n<li>Acceptor \u8c03\u7528 accept \u83b7\u53d6 newfd\u3002<\/li>\n<li>new Channel(poller, newfd) \u521b\u5efa\u901a\u4fe1 Channel\u3002<\/li>\n<li>\u8bbe\u7f6e\u8bfb\u3001\u5199\u3001\u9519\u8bef\u3001\u5173\u95ed\u3001\u4efb\u610f\u4e8b\u4ef6\u56de\u8c03\u3002<\/li>\n<li>EnableRead() \u2192 Update() \u2192 Poller::UpdateEvent() \u2192 epoll_ctl(ADD, newfd, EPOLLIN)\u3002<\/li>\n<h4>4.3 \u901a\u4fe1 Channel \u7684\u8bfb\u4e8b\u4ef6\u6d41\u7a0b<\/h4>\n<li>connfd \u53ef\u8bfb&#xff0c;epoll_wait \u8fd4\u56de\u3002<\/li>\n<li>Poller::Poll \u628a\u901a\u4fe1 Channel \u52a0\u5165 actives\u3002<\/li>\n<li>\u4e0a\u5c42\u8c03\u7528 Channel::HandleEvent()\u3002<\/li>\n<li>\u8bfb\u4e8b\u4ef6\u89e6\u53d1&#xff0c;\u8c03\u7528 _read_callback&#xff0c;\u5373 HandleRead\u3002<\/li>\n<li>HandleRead \u8c03\u7528 recv \u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<li>\u6253\u5370\u6570\u636e&#xff0c;\u8c03\u7528 EnableWrite()\u3002<\/li>\n<li>EnableWrite() \u2192 Update() \u2192 Poller::UpdateEvent() \u2192 epoll_ctl(MOD, connfd, EPOLLIN | EPOLLOUT)\u3002<\/li>\n<li>\u4e0b\u4e00\u6b21 epoll_wait \u8fd4\u56de\u53ef\u5199\u4e8b\u4ef6\u3002<\/li>\n<li>Channel::HandleEvent() \u8c03\u7528 _write_callback&#xff0c;\u5373 HandleWrite\u3002<\/li>\n<li>HandleWrite \u8c03\u7528 send \u53d1\u9001\u201c\u5929\u6c14\u4e0d\u9519&#xff01;\u201d\u3002<\/li>\n<li>\u53d1\u9001\u5b8c\u6210&#xff0c;\u8c03\u7528 DisableWrite()\u3002<\/li>\n<li>DisableWrite() \u2192 Update() \u2192 Poller::UpdateEvent() \u2192 epoll_ctl(MOD, connfd, EPOLLIN)\u3002<\/li>\n<h4>4.4 \u5173\u95ed\u6d41\u7a0b<\/h4>\n<li>recv \u8fd4\u56de &lt;&#061; 0&#xff0c;\u6216 send \u51fa\u9519\u3002<\/li>\n<li>\u8c03\u7528 HandleClose\u3002<\/li>\n<li>HandleClose \u4e2d&#xff1a;\n<ul>\n<li>channel-&gt;Remove() \u2192 Poller::RemoveEvent() \u2192 epoll_ctl(DEL)&#xff0c;\u4ece _channels \u79fb\u9664\u3002<\/li>\n<li>delete channel\u3002<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h3>5. \u6d4b\u8bd5\u4ee3\u7801\u89e3\u6790<\/h3>\n<h4>5.1 \u670d\u52a1\u7aef<\/h4>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    Poller poller<span class=\"token punctuation\">;<\/span><br \/>\n    Socket lst_sock<span class=\"token punctuation\">;<\/span><br \/>\n    lst_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8500<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    Channel <span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>poller<span class=\"token punctuation\">,<\/span> lst_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token punctuation\">.<\/span><span class=\"token function\">SetReadCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>Acceptor<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>poller<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token punctuation\">.<\/span><span class=\"token function\">EnableRead<\/span><span class=\"token punctuation\">(<\/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> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>Channel<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span> actives<span class=\"token punctuation\">;<\/span><br \/>\n        poller<span class=\"token punctuation\">.<\/span><span class=\"token function\">Poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>actives<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\">auto<\/span> <span class=\"token operator\">&amp;<\/span>a <span class=\"token operator\">:<\/span> actives<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            a<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">HandleEvent<\/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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u521b\u5efa Poller\u3002<\/li>\n<li>\u521b\u5efa\u76d1\u542c\u5957\u63a5\u5b57&#xff0c;\u7ed1\u5b9a 8500\u3002<\/li>\n<li>\u4e3a\u76d1\u542c fd \u521b\u5efa Channel\u3002<\/li>\n<li>\u8bbe\u7f6e\u8bfb\u56de\u8c03\u4e3a Acceptor\u3002<\/li>\n<li>\u542f\u52a8\u8bfb\u76d1\u63a7\u3002<\/li>\n<li>\u4e3b\u5faa\u73af&#xff1a;Poll \u62ff\u6d3b\u8dc3 Channel&#xff0c;\u9010\u4e2a HandleEvent\u3002<\/li>\n<\/ul>\n<h4>5.2 Acceptor<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Acceptor<\/span><span class=\"token punctuation\">(<\/span>Poller <span class=\"token operator\">*<\/span>poller<span class=\"token punctuation\">,<\/span> Channel <span class=\"token operator\">*<\/span>lst_channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> lst_channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> newfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>newfd <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    Channel <span class=\"token operator\">*<\/span>channel <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Channel<\/span><span class=\"token punctuation\">(<\/span>poller<span class=\"token punctuation\">,<\/span> newfd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetReadCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>HandleRead<span class=\"token punctuation\">,<\/span> channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetWriteCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>HandleWrite<span class=\"token punctuation\">,<\/span> channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetCloseCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>HandleClose<span class=\"token punctuation\">,<\/span> channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetErrorCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>HandleError<span class=\"token punctuation\">,<\/span> channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">SetEventCallback<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>HandleEvent<span class=\"token punctuation\">,<\/span> channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EnableRead<\/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<ul>\n<li>accept \u65b0\u8fde\u63a5\u3002<\/li>\n<li>new Channel&#xff0c;\u8bbe\u7f6e\u5404\u79cd\u56de\u8c03\u3002<\/li>\n<li>EnableRead \u628a\u65b0 fd \u52a0\u5165 epoll \u76d1\u63a7\u3002<\/li>\n<\/ul>\n<h4>5.3 \u901a\u4fe1\u56de\u8c03<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">HandleRead<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span> <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 punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1023<\/span><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\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token function\">HandleClose<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> buf <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">EnableWrite<\/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\">HandleWrite<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>data <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u5929\u6c14\u4e0d\u9519!&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">,<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><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\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token function\">HandleClose<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">DisableWrite<\/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\">HandleClose<\/span><span class=\"token punctuation\">(<\/span>Channel <span class=\"token operator\">*<\/span>channel<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;close: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Fd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    channel<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Remove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> channel<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u8bfb&#xff1a;recv&#xff0c;\u6253\u5370&#xff0c;\u542f\u52a8\u5199\u4e8b\u4ef6\u3002<\/li>\n<li>\u5199&#xff1a;send&#xff0c;\u5173\u95ed\u5199\u4e8b\u4ef6\u3002<\/li>\n<li>\u5173\u95ed&#xff1a;\u79fb\u9664\u76d1\u63a7&#xff0c;\u5220\u9664 Channel\u3002<\/li>\n<\/ul>\n<h4>5.4 \u5ba2\u6237\u7aef<\/h4>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    Socket cli_sock<span class=\"token punctuation\">;<\/span><br \/>\n    cli_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateClient<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8500<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;127.0.0.1&#034;<\/span><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 number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>string str <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cli_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Send<\/span><span class=\"token punctuation\">(<\/span>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> 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 keyword\">char<\/span> buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span> <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 punctuation\">;<\/span><br \/>\n        cli_sock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Recv<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1023<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">DBG_LOG<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s&#034;<\/span><span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">)<\/span><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    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u8fde\u63a5\u670d\u52a1\u5668\u3002<\/li>\n<li>\u5faa\u73af\u53d1\u9001 &#034;hello&#034;\u3002<\/li>\n<li>\u63a5\u6536\u670d\u52a1\u7aef\u54cd\u5e94&#xff0c;\u7528 DBG_LOG \u6253\u5370&#xff08;\u6240\u4ee5\u4f1a\u5e26\u65e5\u5fd7\u524d\u7f00&#xff09;\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>6. \u603b\u7ed3<\/h3>\n<ul>\n<li>Poller&#xff1a;\u5c01\u88c5 epoll&#xff0c;\u7ba1\u7406 fd -&gt; Channel \u6620\u5c04&#xff0c;\u8d1f\u8d23 epoll_wait \u5e76\u8fd4\u56de\u6d3b\u8dc3 Channel\u3002<\/li>\n<li>Channel&#xff1a;\u5c01\u88c5 fd \u548c\u4e8b\u4ef6\u56de\u8c03&#xff0c;\u8d1f\u8d23\u4e8b\u4ef6\u7684\u5206\u53d1\u5904\u7406\u3002<\/li>\n<li>\u8c03\u7528\u5173\u7cfb&#xff1a;<br \/>\nPoller::Poll \u2192 epoll_wait \u2192 \u627e\u5230 Channel \u2192 Channel::HandleEvent \u2192 \u8c03\u7528\u5177\u4f53\u56de\u8c03\u3002<\/li>\n<li>\u6d4b\u8bd5\u6d41\u7a0b&#xff1a;<br \/>\n\u76d1\u542c Channel \u8bfb\u4e8b\u4ef6 \u2192 Acceptor \u2192 \u521b\u5efa\u901a\u4fe1 Channel \u2192 \u8bfb\u4e8b\u4ef6 \u2192 HandleRead \u2192 \u5199\u4e8b\u4ef6 \u2192 HandleWrite \u2192 \u5173\u95ed \u2192 HandleClose\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e24\u4e2a\u6a21\u5757\u662f Reactor \u6a21\u5f0f\u7684\u57fa\u7840&#xff0c;\u540e\u7eed\u7684 EventLoop\u3001Connection\u3001TcpServer \u90fd\u4f1a\u5728\u6b64\u57fa\u7840\u4e0a\u6784\u5efa\u3002<br \/>\n\u7406\u89e3\u5b83\u4eec\u7684\u8c03\u7528\u5173\u7cfb&#xff0c;\u5c31\u7406\u89e3\u4e86\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u4e8b\u4ef6\u9a71\u52a8\u7684\u6838\u5fc3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Poller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790&#xff1a;\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668&#xff08;Reactor \u96cf\u5f62&#xff09;\u672c\u6587\u57fa\u4e8e\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u9879\u76ee\u4e2d\u7684 Poller \u4e0e Channel \u6a21\u5757\u6e90\u7801\u53ca\u6d4b\u8bd5\u4ee3\u7801&#xff0c;\u68b3\u7406\u4e24\u4e2a\u6a21\u5757\u7684\u804c\u8d23\u3001\u51fd\u6570\u8c03\u7528\u5173\u7cfb\u3001\u4e8b\u4ef6\u5904\u7406\u6d41\u7a0b\u4e0e\u6574\u4f53\u67b6\u6784\u30021. \u6a21\u5757\u6982\u89c8<br \/>\n\u5728 Reactor \u6a21\u578b\u4e2d&#xff0c;\u4e24\u4e2a\u6700\u6838\u5fc3\u7684\u57fa\u7840\u7ec4\u4ef6\u662f&#xff1a;<br \/>\nPoller&#xff1a;\u5bf9 epoll \u7684\u5c01\u88c5&#xff0c;\u8d1f<\/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":[55,58,43],"topic":[],"class_list":["post-108819","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-linux","tag-43"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\uff1aPoller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/108819.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\uff1aPoller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"Poller \u4e0e Channel \u6a21\u5757\u8054\u5408\u89e3\u6790&#xff1a;\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668&#xff08;Reactor \u96cf\u5f62&#xff09;\u672c\u6587\u57fa\u4e8e\u4eff muduo \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u9879\u76ee\u4e2d\u7684 Poller \u4e0e Channel \u6a21\u5757\u6e90\u7801\u53ca\u6d4b\u8bd5\u4ee3\u7801&#xff0c;\u68b3\u7406\u4e24\u4e2a\u6a21\u5757\u7684\u804c\u8d23\u3001\u51fd\u6570\u8c03\u7528\u5173\u7cfb\u3001\u4e8b\u4ef6\u5904\u7406\u6d41\u7a0b\u4e0e\u6574\u4f53\u67b6\u6784\u30021. \u6a21\u5757\u6982\u89c8 \u5728 Reactor \u6a21\u578b\u4e2d&#xff0c;\u4e24\u4e2a\u6700\u6838\u5fc3\u7684\u57fa\u7840\u7ec4\u4ef6\u662f&#xff1a; Poller&#xff1a;\u5bf9 epoll \u7684\u5c01\u88c5&#xff0c;\u8d1f\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/108819.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-22T10:24:52+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" 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