{"id":64857,"date":"2026-01-24T08:17:04","date_gmt":"2026-01-24T00:17:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/64857.html"},"modified":"2026-01-24T08:17:04","modified_gmt":"2026-01-24T00:17:04","slug":"%e3%80%90linux%e3%80%91%e9%ab%98%e7%ba%a7io%ef%bc%8ci-o%e5%a4%9a%e8%b7%af%e8%bd%ac%e6%8e%a5%e4%b9%8bpoll%ef%bc%8c%e6%8e%a5%e5%8f%a3%e5%92%8c%e5%8e%9f%e7%90%86%e8%ae%b2%e8%a7%a3%ef%bc%8cpoll%e7%89%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/64857.html","title":{"rendered":"\u3010linux\u3011\u9ad8\u7ea7IO\uff0cI\/O\u591a\u8def\u8f6c\u63a5\u4e4bpoll\uff0c\u63a5\u53e3\u548c\u539f\u7406\u8bb2\u89e3\uff0cpoll\u7248\u672c\u7684TCP\u670d\u52a1\u5668"},"content":{"rendered":"<p>\u5c0f\u7f16\u4e2a\u4eba\u4e3b\u9875\u8be6\u60c5&lt;\u2014\u8bf7\u70b9\u51fb \u5c0f\u7f16\u4e2a\u4ebagitee\u4ee3\u7801\u4ed3\u5e93&lt;\u2014\u8bf7\u70b9\u51fb linux\u7cfb\u7edf\u7f16\u7a0b\u4e13\u680f&lt;\u2014\u8bf7\u70b9\u51fb linux\u7f51\u7edc\u7f16\u7a0b\u4e13\u680f&lt;\u2014\u8bf7\u70b9\u51fb <font color=\"red\">\u5018\u82e5\u547d\u4e2d\u65e0\u6b64\u8fd0&#xff0c;\u5b64\u8eab\u4ea6\u53ef\u767b\u6606\u4ed1&#xff0c;\u9001\u7ed9\u5c4f\u5e55\u9762\u524d\u7684\u8bfb\u8005\u670b\u53cb\u4eec\u548c\u5c0f\u7f16\u81ea\u5df1! <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001701-69740f7ddee7d.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/font><\/p>\n<hr \/>\n<h4>\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>\u4e00\u3001\u524d\u7f6e\u77e5\u8bc6<\/li>\n<li>\u4e8c\u3001\u63a5\u53e3\u548c\u539f\u7406\u8bb2\u89e3<\/li>\n<li>\u4e09\u3001poll\u7248\u672c\u7684TCP\u670d\u52a1\u5668<\/li>\n<li>\u56db\u3001poll\u7684\u7f3a\u70b9<\/li>\n<li>\u4e94\u3001\u6e90\u4ee3\u7801<\/li>\n<li>\n<ul>\n<li>Main.cc<\/li>\n<li>makefile<\/li>\n<li>PollServer.hpp<\/li>\n<li>Log.hpp<\/li>\n<li>Socket.hpp<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>\u524d\u8a00<\/h3>\n<p>\u3010linux\u3011\u9ad8\u7ea7IO&#xff0c;I\/O\u591a\u8def\u8f6c\u63a5\u4e4bselect&#xff0c;\u63a5\u53e3\u548c\u539f\u7406\u8bb2\u89e3&#xff0c;select\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u9010\u6b65\u5b8c\u5584\u8bb2\u89e3\u2014\u2014\u4e66\u63a5\u4e0a\u6587 \u8be6\u60c5\u8bf7\u70b9\u51fb&lt;\u2014\u2014&#xff0c;\u672c\u6587\u4f1a\u5728\u4e0a\u6587\u7684\u57fa\u7840\u4e0a\u8fdb\u884c\u8bb2\u89e3&#xff0c;\u6240\u4ee5\u5bf9\u4e0a\u6587\u4e0d\u4e86\u89e3\u7684\u8bfb\u8005\u53cb\u53cb\u8bf7\u70b9\u51fb\u524d\u65b9\u7684\u84dd\u5b57\u94fe\u63a5\u8fdb\u884c\u5b66\u4e60 \u672c\u6587\u7531\u5c0f\u7f16\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u2014\u2014\u3010linux\u3011\u9ad8\u7ea7IO&#xff0c;I\/O\u591a\u8def\u8f6c\u63a5\u4e4bpoll&#xff0c;\u63a5\u53e3\u548c\u539f\u7406\u8bb2\u89e3&#xff0c;poll\u7248\u672c\u7684TCP\u670d\u52a1\u5668<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u524d\u7f6e\u77e5\u8bc6<\/h3>\n<li>\u8981\u63d0\u8d77poll&#xff0c;\u4e0d\u5f97\u4e0d\u63d0\u8d77selet&#xff0c;\u5173\u4e8eselect\u7684\u7f3a\u70b9&#xff0c;\u5c0f\u7f16\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u5df2\u7ecf\u8fdb\u884c\u8bb2\u89e3\u8be6\u60c5\u8bf7\u70b9\u51fb&lt;\u2014\u2014&#xff0c;select\u7684\u7f3a\u70b9\u5982\u4e0b <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e123ee.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<li>\u7b2c\u4e00\u70b9&#xff1a;select\u7b49\u5f85\u7684fd\u662f\u6709\u9650\u7684&#xff0c;\u8fd9\u4e2aselect\u7684\u63a5\u53e3\u672c\u8eab\u6709\u95ee\u9898&#xff0c;fd_set\u4f4d\u56fe\u4e2d\u53ea\u80fd\u5bb9\u7eb3\u6709\u9650\u76841024\u4e2afd&#xff0c;\u4e0d\u652f\u6301\u6269\u5bb9\u6216\u8005\u4f20\u9012\u66f4\u591a\u7684fd<\/li>\n<li>\u7b2c\u4e8c\u70b9&#xff1a;\u8f93\u5165\u8f93\u51fa\u578b\u53c2\u6570\u6bd4\u8f83\u591a&#xff08;select\u7684\u540e\u56db\u4e2a\u53c2\u6570&#xff09;&#xff0c;\u6570\u636e\u62f7\u8d1d\u7684\u9891\u7387\u6bd4\u8f83\u9ad8&#xff0c;\u6bcf\u6b21\u8c03\u7528select\u7684\u65f6\u5019&#xff0c;\u4ece\u7528\u6237\u5230\u5185\u6838&#xff0c;\u9700\u8981\u5bf9\u7528\u6237\u5173\u5fc3\u7684fd\u8fdb\u884c\u62f7\u8d1d\u4fee\u6539&#xff0c;\u4ece\u5185\u6838\u5230\u7528\u6237&#xff0c;\u9700\u8981\u5bf9\u5df2\u7ecf\u5c31\u7eea\u7684fd\u8fdb\u884c\u62f7\u8d1d\u4fee\u6539&#xff0c;\u6240\u4ee5\u5982\u679c\u9891\u7e41\u7684\u8c03\u7528select&#xff0c;\u90a3\u4e48\u4e5f\u5c31\u4f1a\u8fdb\u884c\u9891\u7e41\u7684\u6570\u636e\u62f7\u8d1d<\/li>\n<li>\u7b2c\u4e09\u70b9&#xff1a;\u8f93\u5165\u8f93\u51fa\u578b\u53c2\u6570\u6bd4\u8f83\u591a&#xff0c;\u6bcf\u6b21\u90fd\u8981\u5bf9\u5173\u5fc3\u7684fd\u8fdb\u884c\u4e8b\u4ef6\u91cd\u7f6e<\/li>\n<li>\u7b2c\u56db\u70b9&#xff1a;\u5728\u7528\u6237\u5c42&#xff0c;\u8981\u4f7f\u7528\u7b2c\u4e09\u65b9\u6570\u7ec4fd_array\u7ba1\u7406\u7528\u6237\u5173\u5fc3\u7684fd&#xff0c;\u5e76\u4e14\u7528\u6237\u5c42\u9700\u8981\u8fdb\u884c\u591a\u6b21\u7684\u904d\u5386&#xff0c;\u4f8b\u5982\u5728\u8c03\u7528select\u4e4b\u524d\u7528\u6237\u91cd\u7f6erfds\u4e2d\u7528\u6237\u5173\u5fc3\u7684fd\u9700\u8981\u904d\u5386\u6570\u7ec4&#xff0c;\u5728Dispatcher\u5224\u65adfd\u662f\u5426\u5728rfds\u4e2d\u4e5f\u9700\u8981\u8fdb\u884c\u904d\u5386\u6570\u7ec4&#xff0c;\u5728\u8fde\u63a5\u7ba1\u7406\u5668Accepter\u4e2d\u5bfb\u627e\u5408\u9002\u7684\u4f4d\u7f6e\u653e\u5165\u8fde\u63a5\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26sock\u7684\u65f6\u5019\u540c\u6837\u9700\u8981\u904d\u5386\u6570\u7ec4&#xff0c;\u540c\u6837\u7684\u5728\u5185\u6838\u68c0\u6d4bfd\u5c31\u7eea\u4e5f\u9700\u8981\u904d\u5386\u5e95\u5c42\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u8fdb\u800c\u5224\u65ad\u5bf9\u5e94\u7684fd\u4e0a\u7684\u4e8b\u4ef6\u662f\u5426\u5c31\u7eea<\/li>\n<li>\u6240\u4ee5\u867d\u7136select\u662f\u4e00\u4e2a\u591a\u8def\u8f6c\u63a5\u7684\u65b9\u6848&#xff0c;\u53ef\u4ee5\u540c\u65f6\u7b49\u5f85\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u7406\u60f3\u60c5\u51b5\u4e0b&#xff0c;select\u7b49\u5f85\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8d8a\u591a&#xff0c;\u90a3\u4e48\u5355\u4f4d\u65f6\u95f4\u5185\u7b49\u5f85\u7684\u65f6\u95f4\u5c31\u8d8a\u5c11&#xff0c;\u6240\u4ee5IO\u6548\u7387\u8d8a\u9ad8<\/li>\n<li>\u4f46\u662f\u5728\u5b9e\u9645\u4e2d&#xff0c;\u968f\u7740select\u7b49\u5f85\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8d8a\u6765\u8d8a\u591a&#xff0c;\u4e0a\u9762\u7684\u56db\u70b9\u88ab\u89e6\u53d1\u7684\u6982\u7387\u5c31\u8d8a\u591a&#xff0c;\u5373\u5e26\u6765\u7684\u662f\u6570\u636e\u62f7\u8d1d\u8f83\u591a&#xff0c;\u5e76\u4e14\u91cd\u7f6e\u589e\u591a&#xff0c;\u904d\u5386\u589e\u591a&#xff0c;\u6240\u4ee5\u5728\u5b9e\u9645\u4f7f\u7528select\u7684\u65f6\u5019&#xff0c;\u968f\u7740select\u4e00\u6b21\u7b49\u5f85\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8d8a\u6765\u8d8a\u591a&#xff0c;select\u8fdb\u884cIO\u7684\u6548\u7387\u53ef\u80fd\u5230\u8fbe\u67d0\u4e2a\u5cf0\u503c\u4e4b\u540e&#xff0c;\u53ef\u80fd\u4f1a\u589e\u957f\u7f13\u6162<\/li>\n<li>\u6240\u4ee5\u5373\u4f7fselect\u5728\u5176\u5b83IO\u6a21\u578b\u7684\u5bf9\u6bd4\u4e2d&#xff0c;IO\u6548\u7387\u8f83\u9ad8&#xff0c;\u4f46\u662f\u5bf9\u4e8e\u6211\u4eec\u6765\u8bb2\u8fd8\u4e0d\u591f&#xff0c;\u5e76\u4e14\u5bf9\u4e8e\u4e0a\u9762\u7684\u7b2c\u4e00\u70b9\u548c\u7b2c\u4e09\u70b9\u662fselect\u7684\u786c\u4f24&#xff0c;\u4e8e\u662f\u6211\u4eec\u6709\u4e86\u7b2c\u4e8c\u79cd\u591a\u8def\u8f6c\u63a5\u65b9\u6848poll<\/li>\n<h3>\u4e8c\u3001\u63a5\u53e3\u548c\u539f\u7406\u8bb2\u89e3<\/h3>\n<li>poll\u4e5f\u662f\u4e00\u79cd\u591a\u8def\u8f6c\u63a5\u65b9\u6848&#xff0c;poll\u540c\u6837\u7684\u53ea\u8d1f\u8d23\u7b49\u5f85&#xff0c;poll\u540c\u6837\u53ef\u4ee5\u4e00\u6b21\u7b49\u5f85\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u591a\u8def\u8f6c\u63a5\u65b9\u6848poll\u7684\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u662fpoll&#xff0c;\u4f7f\u7528poll\u8981\u5305\u5934\u6587\u4ef6#include &lt;poll.h&gt;&#xff0c;\u6240\u4ee5\u6b64\u65f6\u5982\u4e0b&#xff0c;\u6211\u4eec\u6765\u8ba4\u8bc6\u4e00\u4e0bpoll <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e3780d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" width=\"600\" \/><\/li>\n<li>poll\u7684\u8fd4\u56de\u503cn\u662fint\u7c7b\u578b\u7684&#xff0c;\u5982\u679c\u5927\u4e8e0\u90a3\u4e48\u4ee3\u8868\u6b64\u65f6\u6709n\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u4e8b\u4ef6\u5c31\u7eea\u4e86&#xff0c;\u5982\u679cn\u7b49\u4e8e0&#xff0c;\u90a3\u4e48\u4ee3\u8868\u6b64\u65f6poll\u7b49\u5f85\u8d85\u65f6\u4e86&#xff0c;\u5982\u679cn\u5c0f\u4e8e0&#xff0c;\u90a3\u4e48\u4ee3\u8868\u7b49\u5f85\u51fa\u9519\u4e86<\/li>\n<li>\u9996\u5148poll\u6709\u4e09\u4e2a\u53c2\u6570&#xff0c;\u90a3\u4e48\u6211\u4eec\u6b64\u65f6\u5148\u6765\u770bpoll\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570&#xff0c;\u5373int\u7c7b\u578b\u7684timeout\u8d85\u65f6\u65f6\u95f4&#xff0c;timeout\u7684\u5355\u4f4d\u662f\u5fae\u79d2us&#xff0c;\u5373\u5982\u679c\u6211\u4eec\u60f3\u8981\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u4e3a3\u79d2&#xff0c;\u90a3\u4e48\u6b64\u65f6\u5c31\u8981\u5c06\u79d2\u6362\u7b97\u6210\u5fae\u79d2\u8fdb\u884c\u4f20\u53c2&#xff0c;1\u79d2\u7b49\u4e8e1000\u5fae\u79d2&#xff0c;\u6240\u4ee5\u5982\u679c\u60f3\u8981\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u4e3a3\u79d2&#xff0c;\u90a3\u4e48timeout\u8981\u88ab\u8bbe\u7f6e\u4e3a3000<\/li>\n<li>poll\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u9488&#xff0c;\u6307\u5411\u4e00\u4e2astruct pollfd\u7684\u7c7b\u578b&#xff0c;\u8fd9\u4e2a\u7c7b\u578b\u7684\u6210\u5458\u53d8\u91cf\u6709\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26fd&#xff0c;\u4e00\u4e2ashort\u7c7b\u578b\u7684events&#xff0c;\u8fd8\u6709\u4e00\u4e2ashort\u7c7b\u578b\u7684revents&#xff0c;\u5bf9\u4e8e\u7b2c\u4e00\u4e2a\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\u662f\u4ec0\u4e48\u4f5c\u7528&#xff0c;\u5373\u7528\u6237\u544a\u8bc9\u5185\u6838\u5e2e\u6211\u5173\u5fc3\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u4e0a\u7684\u67d0\u67d0\u4e8b\u4ef6&#xff0c;\u4e5f\u53ef\u4ee5\u7528\u4f5c\u5185\u6838\u544a\u8bc9\u7528\u6237\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u67d0\u67d0\u4e8b\u4ef6\u5df2\u7ecf\u5c31\u7eea\u4e86&#xff0c;\u8d76\u5feb\u6765\u8bfb\u53d6\u5427<\/li>\n<li>\u6240\u4ee5\u7528\u6237\u5728\u7ed9\u5185\u6838\u4f20\u5165\u7684\u65f6\u5019&#xff0c;\u5982\u4f55\u624d\u80fd\u544a\u77e5\u5185\u6838\u5e2e\u6211\u5173\u5fc3\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u5177\u4f53\u4e8b\u4ef6\u5462&#xff1f;\u6211\u4eec\u77e5\u9053\u5176\u5b9e\u5185\u6838\u559c\u6b22\u4f7f\u7528\u6bd4\u7279\u4f4d\u6765\u4f20\u9012\u4fe1\u606f&#xff0c;\u6240\u4ee5\u7b2c\u4e8c\u4e2a\u6210\u5458\u53d8\u91cfshort\u7c7b\u578b\u7684events\u5c31\u662f\u7528\u6237\u7ed9\u5185\u6838\u4f20\u5165\u7684\u65f6\u5019\u8981\u4f7f\u7528\u7684&#xff0c;\u5373short\u7c7b\u578b\u7684events\u4e5f\u52bf\u5fc5\u4f7f\u7528\u4e86\u6bd4\u7279\u4f4d\u4f20\u9012\u4fe1\u606f <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e5ec70.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<li>\u90a3\u4e48event\u901a\u8fc7\u8bbe\u7f6e\u4e0a\u9762\u7684\u6807\u5fd7\u4f4d&#xff0c;\u7136\u540e\u5c31\u53ef\u4ee5\u544a\u8bc9\u5185\u6838\u8981\u5173\u5fc3\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u4ec0\u4e48\u4e8b\u4ef6&#xff0c;\u4f8b\u5982\u5173\u5fc3\u8bfb\u4e8b\u4ef6\u53ef\u4ee5\u8bbe\u7f6ePOLLIN&#xff0c;\u5173\u5fc3\u5199\u4e8b\u4ef6\u53ef\u4ee5\u8bbe\u7f6ePOLLOUT\u7b49&#xff0c;\u5982\u679c\u8981\u5173\u5fc3\u591a\u4e2a\u4e8b\u4ef6&#xff0c;\u90a3\u4e48\u8fdb\u884c\u6309\u4f4d\u4e0e\u4e00\u8d77\u8bbe\u7f6e\u5373\u53ef <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e3780d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" width=\"600\" \/><\/li>\n<li>\u90a3\u4e48struct pollfd\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570revents\u662f\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u4e86\u7528\u6237\u8ba9\u5173\u5fc3\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u5c31\u7eea\u4e86\u4e4b\u540e&#xff0c;\u90a3\u4e48\u5185\u6838\u5c31\u8bbe\u7f6erevents&#xff0c;\u4f8b\u5982\u8bfb\u4e8b\u4ef6\u5c31\u7eea\u4e86\u90a3\u4e48\u5c31\u8bbe\u7f6ePOLLIN&#xff0c;\u5199\u4e8b\u4ef6\u5c31\u7eea\u90a3\u90a3\u4e48\u5c31\u8bbe\u7f6ePOLLOUT\u7b49&#xff0c;\u5982\u679c\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u4e0a\u7684\u591a\u4e2a\u4e8b\u4ef6\u540c\u65f6\u5c31\u7eea&#xff0c;\u90a3\u4e48\u8fdb\u884c\u6309\u4f4d\u4e0e\u4e00\u8d77\u8bbe\u7f6e\u5373\u53ef&#xff0c;\u6240\u4ee5poll\u5b9e\u73b0\u4e86\u5c06fd\u7684\u8f93\u5165\u4e8b\u4ef6\u548c\u8f93\u51fa\u4e8b\u4ef6\u8fdb\u884c\u5206\u79bb<\/li>\n<li>\u6211\u4eec\u8bf4poll\u53ef\u4ee5\u89e3\u51b3select\u7684fd\u6709\u4e0a\u9650\u7684\u95ee\u9898&#xff0c;\u5982\u4f55\u89e3\u51b3&#xff1f;\u90a3\u4e48\u5c31\u662f\u901a\u8fc7\u7b2c\u4e00\u4e2a\u53c2\u6570\u548c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u89e3\u51b3&#xff0c;poll\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u9488&#xff0c;\u786e\u5207\u7684\u8bf4\u662f\u4e00\u4e2a\u6570\u7ec4&#xff0c;\u6570\u7ec4\u4e2d\u88ab\u8bbe\u7f6e\u7684\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u662f\u7528\u6237\u9700\u8981\u5185\u6838\u5173\u5fc3\u7684&#xff0c;\u90a3\u4e48poll\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e2a\u6570&#xff0c;\u5373\u8fd9\u4e2a\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u7684\u4e2a\u6570&#xff0c;\u6240\u4ee5poll\u4e5f\u548cselect\u4e00\u6837&#xff0c;\u9700\u8981\u7528\u6237\u5728\u7528\u6237\u5c42\u7ef4\u62a4\u4e00\u4e2a\u6570\u7ec4\u6765\u7ba1\u7406fd&#xff0c;\u90a3\u4e48\u6b64\u65f6\u95ee\u9898\u6765\u4e86&#xff0c;\u4e0d\u662f\u8bf4poll\u53ef\u4ee5\u89e3\u51b3select\u7684fd\u6709\u4e0a\u9650\u7684\u95ee\u9898\u5417&#xff0c;poll\u8fd8\u662f\u4f7f\u7528\u4e86\u4e00\u4e2a\u6570\u7ec4<\/li>\n<li>\u4f46\u662fpoll\u4e0eselect\u4e0d\u4e00\u6837\u7684\u662f&#xff0c;poll\u7684\u8fd9\u4e2a\u6570\u7ec4\u5f88\u6709\u7279\u70b9&#xff0c;poll\u7684\u8fd9\u4e2a\u6570\u7ec4\u662f\u76f4\u63a5\u7528\u4e8e\u4f20\u53c2\u7684&#xff0c;\u5e76\u4e14poll\u7684\u8fd9\u4e2a\u6570\u7ec4\u7684\u5927\u5c0f\u7531\u7528\u6237\u6765\u5b9a&#xff0c;poll\u7ed9\u7528\u6237\u6743\u5229&#xff0c;\u8ba9\u7528\u6237\u51b3\u5b9a\u9700\u8981\u5173\u5fc3\u591a\u5c11fd&#xff0c;\u597d&#xff0c;\u65e2\u7136\u4f60\u8bf4poll\u53ef\u4ee5\u89e3\u51b3select\u7684fd\u6709\u4e0a\u9650\u7684\u95ee\u9898&#xff0c;\u90a3\u4e48\u6211\u7528\u6237\u5173\u5fc310\u4ebf\u4e2afd&#xff0c;\u5373\u6b64\u65f6\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u9700\u8981\u5f0010\u4ebf\u4e2a&#xff0c;\u4f46\u662f\u4e8b\u5b9e\u7684\u60c5\u666f\u662f&#xff0c;\u5f00\u4e0d\u51fa\u6765\u8fd9\u4e48\u591a\u7684\u7a7a\u95f4&#xff0c;\u90a3\u4e48\u6211\u4eec\u5982\u4f55\u7406\u89e3\u5462&#xff1f;<\/li>\n<li>\u5f88\u597d\u7406\u89e3&#xff0c;\u6211poll\u63d0\u4f9b\u7ed9\u7528\u6237&#xff0c;\u5141\u8bb8\u8ba9\u7528\u6237\u5173\u5fc310\u4ebf\u4e2afd&#xff0c;\u4f46\u662f\u5b9e\u9645\u60c5\u51b5\u4e0b\u6570\u7ec4\u4e2d\u653e\u7684\u5bf9\u8c61\u5f00\u4e0d\u51fa10\u4ebf\u4e2a&#xff0c;\u90a3\u4e48\u6b64\u65f6\u662f\u8c01\u7684\u95ee\u9898&#xff1f;\u80af\u5b9a\u4e0d\u662f\u6211poll\u7684\u95ee\u9898\u5440&#xff0c;\u5b9e\u9645\u60c5\u51b5\u662f\u5185\u5b58\u4e0d\u8db3\u4e86&#xff0c;\u6240\u4ee5\u8bf4\u662f\u786c\u4ef6\u7684\u95ee\u9898&#xff0c;\u6211poll\u5c31\u8981\u5f0010\u4ebf\u4e2a&#xff0c;\u786c\u4ef6\u4e0d\u652f\u6301&#xff0c;\u662f\u786c\u4ef6\u7684\u95ee\u9898&#xff0c;\u4e0d\u662f\u6211poll\u7684\u95ee\u9898&#xff0c;\u6240\u4ee5poll\u89e3\u51b3\u4e86select\u7684fd\u6709\u4e0a\u9650\u7684\u95ee\u9898 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e3780d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" width=\"600\" \/><\/li>\n<li>\u6240\u4ee5\u6b64\u65f6\u6211\u4eec\u6765\u770b&#xff0c;poll\u7684\u63a5\u53e3\u76f8\u5bf9\u4e8eselect\u662f\u66f4\u7b80\u5355\u4e86&#xff0c;\u5373\u63a5\u53e3\u7684\u8fdb\u6b65\u662f\u8d8b\u5411\u4e8e\u8d8a\u6765\u8d8a\u7b80\u5355\u8fdb\u884c\u8bbe\u8ba1&#xff0c;poll\u76f8\u5bf9\u4e8eselect\u6ca1\u6709\u90a3\u4e48\u591a\u7684\u8f93\u5165\u8f93\u51fa\u53c2\u6570&#xff0c;\u8bf8\u5982select\u4e2d&#xff0c;\u5bf9\u4e8efd_set\u4f4d\u56fe\u6765\u8bb2\u5982\u679c\u4e0d\u77e5\u9053\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e\u662f\u4ec0\u4e48\u542b\u4e49&#xff0c;\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9\u662f\u4ec0\u4e48\u542b\u4e49&#xff0c;\u6839\u672c\u5c31\u65e0\u6cd5\u4f7f\u7528selct&#xff0c;\u5e76\u4e14\u5bf9\u4e8e\u8d85\u65f6\u65f6\u95f4&#xff0c;poll\u4e5f\u91c7\u7528\u4e86\u66f4\u7b80\u5355\u7684\u65b9\u5f0f&#xff0c;\u76f4\u63a5\u4f20\u4e00\u4e2aint\u7c7b\u578b&#xff0c;\u820d\u5f03\u4e86select\u4e2d\u8fd8\u8981\u4f20\u53c2\u4e00\u4e2a\u7ed3\u6784\u4f53\u6765\u8868\u793a\u8d85\u65f6\u65f6\u95f4<\/li>\n<li>\u4e0d\u662f\u8bf4poll\u53ef\u4ee5\u89e3\u51b3select\u7684\u786c\u4f24&#xff0c;\u5176\u4e2dselect\u7684\u786c\u4f24\u6709\u4e24\u4e2a&#xff0c;\u4e00\u4e2a\u662ffd\u6709\u4e0a\u9650&#xff0c;\u7b2c\u4e8c\u4e2a\u662f\u6bcf\u6b21\u8c03\u7528select&#xff0c;\u7528\u6237\u90fd\u8981\u5bf9\u5173\u5fc3\u7684fd\u8fdb\u884c\u91cd\u7f6e&#xff0c;\u6240\u4ee5\u8bf4\u4f60\u7684\u610f\u601d\u662fpoll\u4e0d\u9700\u8981\u6bcf\u6b21\u8c03\u7528poll\u7684\u65f6\u5019&#xff0c;\u5bf9\u7528\u6237\u5173\u5fc3\u7684fd\u8fdb\u884c\u91cd\u7f6e&#xff1f;<\/li>\n<li>\u662f\u7684&#xff0c;struct pollfd\u8fd9\u4e2a\u7ed3\u6784\u4f53\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u6709fd&#xff0c;events&#xff0c;revents&#xff0c;\u7531\u4e8e\u6709struct pollfd\u8fd9\u4e2a\u7ed3\u6784\u7684\u652f\u6491&#xff0c;poll\u5b9e\u73b0\u4e86\u5bf9fd\u7684\u8f93\u5165\u4e8b\u4ef6\u548c\u8f93\u51fa\u4e8b\u4ef6\u8fdb\u884c\u5206\u79bb&#xff0c;\u6240\u4ee5\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u4e8b\u4ef6\u5c31\u7eea\u7684\u65f6\u5019&#xff0c;\u5bf9\u4e8e\u4e00\u4e2astruct pollfd\u8fd9\u4e2a\u7ed3\u6784\u4f53\u4e2d\u7684\u6210\u5458\u53d8\u91cffd&#xff0c;events\u4e0d\u4f1a\u8fdb\u884c\u4fee\u6539&#xff0c;\u5185\u6838\u8981\u8fdb\u884c\u4fee\u6539\u7684\u662frevents<\/li>\n<li>\u5982\u679c\u7528\u6237\u8c03\u7528poll\u7684\u65f6\u5019&#xff0c;\u7528\u6237\u4e0b\u6b21\u8fd8\u9700\u8981\u5bf9\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u4e8b\u4ef6\u8fdb\u884c\u5173\u5fc3&#xff0c;\u90a3\u4e48\u4e0d\u7528\u5bf9\u8fd9\u4e2afd\u8fdb\u884c\u91cd\u7f6e&#xff0c;\u76f4\u63a5\u8fdb\u884c\u4f20\u5165\u5373\u53ef&#xff0c;\u56e0\u4e3afd\u53ef\u4ee5\u544a\u77e5\u5185\u6838\u7528\u6237\u8981\u5173\u5fc3\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;events\u53ef\u4ee5\u544a\u77e5\u5185\u6838&#xff0c;\u7528\u6237\u8981\u5173\u5fc3\u7684\u662ffd\u4e0a\u7684\u5177\u4f53\u4e8b\u4ef6&#xff0c;\u6240\u4ee5poll\u53ef\u4ee5\u5b8c\u7f8e\u7684\u89e3\u51b3select\u76842\u4e2a\u786c\u4f24<\/li>\n<li>\u6240\u4ee5\u6b64\u65f6\u6211\u4eec\u611f\u89c9poll\u548cselect\u5f88\u50cf&#xff0c;\u5728\u7528\u6237\u5c42\u8fd8\u6709\u5185\u6838\u90fd\u9700\u8981\u8fdb\u884c\u5f88\u591a\u7684\u904d\u5386\u624d\u80fd\u786e\u8ba4fd\u4e0a\u7684\u4e8b\u4ef6\u662f\u5426\u7ee7\u7eed&#xff0c;\u53ea\u4e0d\u8fc7poll\u548cselect\u4e0d\u4e00\u6837\u7684\u662fpoll\u66f4\u7b80\u5355&#xff0c;\u66f4\u5bb9\u6613\u8ba9\u6211\u4eec\u4e0a\u624b&#xff0c;\u6240\u4ee5\u4e5f\u5c31\u610f\u5473\u7740\u53ea\u8981\u6211\u4eec\u638c\u63e1\u4e86select\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u7684\u7f16\u5199&#xff0c;\u90a3\u4e48poll\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u7684\u7f16\u5199\u4e5f\u5c31\u5f88\u7b80\u5355\u4e86<\/li>\n<li>\u6240\u4ee5\u4e0b\u9762\u6211\u4eec\u4e0d\u5e9f\u8bdd&#xff0c;\u76f4\u63a5\u57fa\u4e8e\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u7684select\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u7684\u4ee3\u7801 \u7b2c\u4e8c\u70b9\u8bb2\u89e3\u7684select\u7248\u672c\u7684TCP\u670d\u52a1\u5668&#xff0c;\u8be6\u60c5\u8bf7\u70b9\u51fb&lt;\u2014\u2014&#xff0c;\u8fdb\u884c\u4ee3\u7801\u7684\u4e00\u4e9b\u7b80\u5355\u7684\u4fee\u6539&#xff0c;\u5feb\u901f\u5b9e\u73b0\u4e00\u4e0bpoll\u7248\u672c\u7684TCP\u670d\u52a1\u5668<\/li>\n<h3>\u4e09\u3001poll\u7248\u672c\u7684TCP\u670d\u52a1\u5668<\/h3>\n<li>\u9996\u5148\u6211\u4eec\u7684\u76ee\u7684\u5c31\u662f\u8981\u57fa\u4e8eselect\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u7684\u4ee3\u7801\u8fdb\u884c\u4fee\u6539\u5b9e\u73b0poll\u7248\u672c\u7684TCP\u670d\u52a1\u5668&#xff0c;\u6240\u4ee5\u5982\u4e0b\u662fselect\u7248\u672c\u7684TCP\u670d\u52a1\u5668\u7684\u4ee3\u7801<\/li>\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;sys\/select.h&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 macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;Log.hpp&#034;<\/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\">&#034;Socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">uint16_t<\/span> defaultport <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">8080<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> fd_num_max <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>fd_set<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> defaultfd <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SelectServer<\/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\">SelectServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint16_t<\/span> port <span class=\"token operator\">&#061;<\/span> defaultport<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span><span class=\"token function\">_port<\/span><span class=\"token punctuation\">(<\/span>port<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><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> defaultfd<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\">Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/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\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        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> _listensock<span class=\"token punctuation\">.<\/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\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;accept success, %s:%d, sock fd: %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> sock<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 number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> pos <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> pos<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\">if<\/span><span class=\"token punctuation\">(<\/span>fd_array<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> defaultfd<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><\/p>\n<p>        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pos <span class=\"token operator\">&#061;&#061;<\/span> fd_num_max<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>Warning<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;server is full, close %d now&#034;<\/span><span class=\"token punctuation\">,<\/span> sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>sock<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            fd_array<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> sock<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">PrintFd<\/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\">Recver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> pos<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        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 operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a message: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> buffer <span class=\"token operator\">&lt;&lt;<\/span> endl<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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            fd_array<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> defaultfd<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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            fd_array<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> defaultfd<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\">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><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><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><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\">Fd<\/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 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 punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/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\">\/\/ \u6570\u636e\u8bfb\u53d6\u5668<\/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 punctuation\">}<\/span><\/p>\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\">Fd<\/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\">for<\/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            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><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;<\/span> defaultfd<span class=\"token punctuation\">)<\/span><br \/>\n                <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><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ struct timeval timeout &#061; {2, 0};<\/span><br \/>\n            <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><br \/>\n            <span class=\"token comment\">\/\/ int n &#061; select(listensock &#043; 1, &amp;rfds, nullptr, nullptr, &amp;timeout);<\/span><br \/>\n            <span class=\"token comment\">\/\/ int n &#061; select(listensock &#043; 1, &amp;rfds, nullptr, nullptr, nullptr);<\/span><br \/>\n            <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 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                    cout <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><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">PrintFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;online fd list: &#034;<\/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><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;<\/span> defaultfd<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> fd_array<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">SelectServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/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\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    Sock _listensock<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> _port<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd_array<span class=\"token punctuation\">[<\/span>fd_num_max<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><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7eb1c2b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<li>\u90a3\u4e48\u5bf9\u4e8e\u4ee3\u7801\u6574\u4f53\u7684\u6846\u67b6\u6211\u4eec\u4e0d\u9700\u8981\u8fdb\u884c\u5f88\u5927\u7684\u6539\u52a8&#xff0c;\u9996\u5148\u6539\u53d8\u5982\u4e0a\u7684\u6587\u4ef6\u540d\u4e3aPollServer.hpp\u4ee5\u53caMain.cc\u4e2d\u7684main\u51fd\u6570\u4e2d\u8c03\u7528\u667a\u80fd\u6307\u9488\u7ba1\u7406\u7684\u7c7b\u4e3aPollServer<\/li>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;PollServer.hpp&#034;<\/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><\/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    unique_ptr<span class=\"token operator\">&lt;<\/span>PollServer<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">svr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token function\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    svr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    svr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <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<li>\u63a5\u4e0b\u6765\u5728PollServer.hpp\u4e2d\u5c06\u5c01\u88c5\u7684\u7c7b\u7684\u540d\u79f0\u4fee\u6539\u4e3aPollServer&#xff0c;\u5e76\u4e14\u540c\u6b65\u4fee\u6539\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\u7684\u540d\u79f0\u4e3aPollServer\u4ee5\u53ca~PollServer&#xff0c;\u63a5\u4e0b\u6765\u5c06\u7528\u6237\u5c42\u7ef4\u62a4\u7ba1\u7406fd\u7684\u6570\u7ec4\u4fee\u6539\u4e3astruct pollfd _event_fds[fd_num_max];&#xff0c;\u5176\u4e2dfd_num_max\u6211\u4eec\u8bbe\u7f6e\u4e3a64&#xff0c;\u5373\u6b64\u65f6\u6211\u4eec\u4ec5\u5173\u5fc3\u6700\u591a64\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u5982\u679c\u9700\u8981\u5173\u5fc3\u66f4\u591a&#xff0c;\u90a3\u4e48\u8fdb\u884c\u8bbe\u7f6e\u5373\u53ef&#xff0c;\u90a3\u4e48\u5bf9\u4e8e\u6790\u6784\u51fd\u6570\u4ee5\u53caInit\u521d\u59cb\u5316\u670d\u52a1\u5668\u6211\u4eec\u4e0d\u9700\u8981\u6539\u52a8<\/li>\n<li>\u63a5\u4e0b\u6765\u5b9a\u4e49\u4e00\u4e2a\u5168\u5c40\u7684int non_event &#061; 0\u8868\u793a\u6ca1\u6709\u8981\u5173\u5fc3\u7684\u6216\u8005\u5c31\u7eea\u7684\u4e8b\u4ef6&#xff0c;\u90a3\u4e48\u5728\u6784\u9020\u51fd\u6570\u4e2d\u904d\u5386_event_fds\u6570\u7ec4&#xff0c;\u4f7f\u7528non_event\u521d\u59cb\u5316\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u6210\u5458\u5bf9\u8c61struct pollfd\u4e2d\u7684events\u4ee5\u53carevents&#xff0c;\u56e0\u4e3aevents\u4ee5\u53carevents\u662f\u901a\u8fc7\u8bbe\u7f6e\u7684\u6bd4\u7279\u4f4d\u4f20\u9012\u4fe1\u606f\u7684&#xff0c;\u6240\u4ee5\u5982\u679cnon_event\u4e3a0&#xff0c;\u5373\u6b64\u65f6\u6bd4\u7279\u4f4d\u4e0a\u5168\u90e8\u4e3a0\u8868\u793a\u4e0d\u5173\u5fc3\u4efb\u4f55\u4e8b\u4ef6\u6216\u8005\u6ca1\u6709\u6587\u4ef6\u63cf\u8ff0\u4e0a\u7684\u4efb\u4f55\u4e8b\u4ef6\u5c31\u7eea<\/li>\n<li>\u5e76\u4e14\u4f7f\u7528defaultfd &#061; -1\u53bb\u521d\u59cb\u5316struct pollfd\u4e2d\u7684fd\u5373\u53ef&#xff0c;\u6587\u4ef6\u63cf\u8ff0\u7b26\u88ab\u521d\u59cb\u5316\u4e3adefaultfd\u8868\u793a\u8fd9\u4e2a\u4f4d\u7f6e\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u65e0\u6548&#xff0c;\u5373\u4f7f\u5185\u6838\u6536\u5230\u4e86\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e5f\u4f1a\u8fdb\u884c\u5ffd\u7565&#xff0c;\u56e0\u4e3a\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u6570\u7ec4\u7684\u4e0b\u6807&#xff0c;\u4e0b\u6807\u90fd\u662f\u5927\u4e8e\u7b49\u4e8e0\u7684&#xff0c;\u6240\u4ee5defaultfd &#061; 1\u8868\u793a\u6587\u4ef6\u63cf\u8ff0\u7b26\u65e0\u6548<\/li>\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;sys\/select.h&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 macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;poll.h&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\">&#034;Log.hpp&#034;<\/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\">&#034;Socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">uint16_t<\/span> defaultport <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">8080<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> fd_num_max <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">64<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> defaultfd <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> non_event <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PollServer<\/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\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint16_t<\/span> port <span class=\"token operator\">&#061;<\/span> defaultport<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span><span class=\"token function\">_port<\/span><span class=\"token punctuation\">(<\/span>port<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><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<span class=\"token punctuation\">;<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> non_event<span class=\"token punctuation\">;<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>revents <span class=\"token operator\">&#061;<\/span> non_event<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\">Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/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\">Accepter<\/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\">Recver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> pos<span class=\"token punctuation\">)<\/span><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><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Start<\/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\">PrintFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/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\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    Sock _listensock<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> _port<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">pollfd<\/span> _event_fds<span class=\"token punctuation\">[<\/span>fd_num_max<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<li>\u90a3\u4e48\u63a5\u4e0b\u6765\u5728Start\u51fd\u6570\u4e2d&#xff0c;\u4f5c\u4e3a\u4e00\u6b3e\u670d\u52a1\u5668\u6211\u4eec\u4e00\u5b9a\u8981\u5173\u5fc3\u7684\u662f\u7528\u4e8e\u76d1\u542c\u8fde\u63a5\u5230\u6765\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26listensock&#xff0c;\u6240\u4ee5\u5728Start\u7684for\u5faa\u73af\u5f00\u59cb\u524d\u6211\u4eec\u5c31\u5c06listensock\u8bbe\u7f6e\u8fdb_event_fds\u6570\u7ec4\u76840\u53f7\u4f4d\u7f6e\u4e2d&#xff0c;\u5373\u5c060\u53f7\u4f4d\u7f6e\u7684\u5bf9\u8c61struct pollfd\u7684\u6210\u5458\u53d8\u91cffd\u8bbe\u7f6e\u4e3alistensock&#xff0c;\u7136\u540e\u5c06events\u8bbe\u7f6e\u4e3aPOLLIN&#xff0c;\u5373\u5173\u5fc3listensock\u7684\u8bfb\u4e8b\u4ef6&#xff0c;\u540c\u6837\u7684\u8d85\u65f6\u65f6\u95f4timeout\u6211\u4eec\u8bbe\u7f6e\u4e3a3000\u8868\u793a3000\u5fae\u79d2&#xff0c;\u5373\u5bf9\u5e943\u79d2 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7e3780d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" width=\"600\" \/><\/li>\n<li>\u90a3\u4e48\u5728for\u5faa\u73af\u4e2d&#xff0c;\u5c31\u53ef\u4ee5\u5f00\u59cb\u6267\u884c\u670d\u52a1\u5668\u7684\u903b\u8f91\u4e86&#xff0c;poll\u591a\u8def\u8f6c\u63a5\u65b9\u6848\u76f8\u5bf9select&#xff0c;poll\u5728\u6bcf\u6b21\u8c03\u7528\u524d\u4e0d\u9700\u8981\u5bf9\u5173\u5fc3\u7684fd\u8fdb\u884c\u91cd\u7f6e\u4ee5\u53ca\u6c42\u51famaxfd\u7684\u503c&#xff0c;\u6240\u4ee5\u6211\u4eec\u5c06select\u7684\u8fd9\u4e9b\u5de5\u4f5c\u76f4\u63a5\u5220\u9664\u6389&#xff0c;\u7136\u540e\u76f4\u63a5\u5f00\u59cb\u8c03\u7528poll\u8fdb\u884c\u4f9d\u6b21\u4f20\u53c2\u5373\u53ef_event_fds, fd_num_max, timeout<\/li>\n<li>\u63a5\u4e0b\u6765\u5c06n &#061; 0\u7684\u60c5\u51b5\u4e2d\u5bf9\u5e94\u6253\u5370\u7684\u8d85\u65f6\u65f6\u95f4\u7684\u6253\u5370\u5220\u9664&#xff0c;\u56e0\u4e3a\u6b64\u65f6poll\u7684timeout\u8d85\u65f6\u65f6\u95f4\u4e0d\u518d\u662f\u548cselect\u4e00\u6837\u662f\u8f93\u5165\u8f93\u51fa\u578b\u53c2\u6570\u4e86&#xff0c;\u7136\u540eDispatcher\u5206\u6d3e\u5668\u4e0d\u9700\u8981\u4f20\u5165\u4efb\u4f55\u53c2\u6570&#xff0c;\u56e0\u4e3a\u5df2\u7ecf\u5c31\u7eea\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u4e8b\u5047&#xff0c;\u5185\u6838\u5df2\u7ecf\u8fdb\u884c\u4e86\u8bbe\u7f6e\u8fdb\u4e86\u7c7b\u7684\u6210\u5458\u51fd\u6570_event_fds\u4e2d\u7684\u5bf9\u8c61struct pollfd\u4e2d\u7684\u6210\u5458\u53d8\u91cfrevents\u4e2d<\/li>\n<li>\u6240\u4ee5\u5728\u6d3e\u53d1\u5668\u4e2d\u904d\u5386_event_fds\u6570\u7ec4&#xff0c;\u7136\u540e\u627e\u51fafd\u4e0d\u4e3adefaultfd\u7684\u4f4d\u7f6e&#xff0c;\u7136\u540e\u4f7f\u7528\u6309\u4f4d\u4e0e\u770brevents\u4e2d\u7684\u6bd4\u7279\u4f4d\u7684\u8bfb\u4e8b\u4ef6\u662f\u5426\u88ab\u5185\u6838\u8bbe\u7f6e\u4e3aPOLLIN\u4e86&#xff0c;\u5982\u679c\u8bbe\u7f6e\u4e86&#xff0c;\u90a3\u4e48\u6309\u4f4d\u4e0e\u7684\u7ed3\u679c\u4e3atrue\u8868\u793a\u5185\u6838\u544a\u8bc9\u6211\u4eec&#xff0c;\u4f60\u7528\u6237\u8ba9\u6211\u5173\u5fc3\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u7684\u4e8b\u4ef6\u5df2\u7ecf\u5c31\u7eea\u4e86&#xff0c;\u6240\u4ee5\u6b64\u65f6\u6211\u4eec\u518d\u5224\u65ad\u5982\u679c\u8fd9\u4e2afd\u662flistensock\u6211\u4eec\u5c31\u4f7f\u7528\u8fde\u63a5\u7ba1\u7406\u5668Accepter\u5c31\u83b7\u53d6\u8fde\u63a5&#xff0c;\u5426\u5219\u6211\u4eec\u5c31\u4f7f\u7528\u6570\u636e\u8bfb\u53d6\u5668Recver\u8bfb\u53d6\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e2d\u5e95\u5c42\u63a5\u6536\u7f13\u51b2\u533a\u7684\u6570\u636e<\/li>\n<p><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><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\">Fd<\/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 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 punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><br \/>\n            <span class=\"token punctuation\">{<\/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\">\/\/ \u6570\u636e\u8bfb\u53d6\u5668<\/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 punctuation\">}<\/span><\/p>\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\">Fd<\/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><br \/>\n    <span class=\"token keyword\">for<\/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\">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                cout <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><\/p>\n<li>\u90a3\u4e48\u6b64\u65f6\u6211\u4eec\u6765\u770b\u8fde\u63a5\u7ba1\u7406\u5668Accepter&#xff0c;\u6b64\u65f6listensock\u4e0a\u7684\u8bfb\u4e8b\u4ef6\u5c31\u7eea\u4e86&#xff0c;\u5373\u5e95\u5c42\u7684\u8fde\u63a5\u5230\u6765\u4e86&#xff0c;\u6211\u4eec\u5e94\u8be5\u4f7f\u7528Accept\u5c06\u8fde\u63a5\u83b7\u53d6\u4e0a\u6765\u7136\u540e\u653e\u5230_event_fds\u6570\u7ec4\u4e2d&#xff0c;\u90a3\u4e48\u904d\u5386_event_fds\u6570\u7ec4\u5bfb\u627e\u4e00\u4e2a\u4f4d\u7f6e\u653e\u5165sock<\/li>\n<li>\u5982\u679c\u904d\u5386_event_fds\u6570\u7ec4\u4e4b\u540e\u53d1\u73b0\u6ca1\u6709\u4f4d\u7f6e\u4e86&#xff0c;\u6240\u4ee5\u6b64\u65f6\u6211\u4eec\u6709\u4e24\u79cd\u7b56\u7565 &#xff08;\u4e00&#xff09;\u7b2c\u4e00\u79cd\u662f\u4ec5\u4ec5\u7ef4\u62a4fd_num_max &#061; 64&#xff0c;\u5373\u6211\u4eec\u53ea\u5173\u5fc364\u4e2afd&#xff0c;\u5982\u679c\u6570\u7ec4\u6ee1\u4e86&#xff0c;\u90a3\u4e48\u540e\u7eed\u6211\u4eec\u5728\u83b7\u53d6\u4e0a\u6765\u7684\u8fde\u63a5\u5c31\u76f4\u63a5\u5173\u6389 &#xff08;\u4e8c&#xff09;\u7b2c\u4e8c\u79cd\u7b56\u7565\u662f\u8fdb\u884c\u6269\u5bb9&#xff0c;\u90a3\u4e48\u8fd9\u91cc\u6211\u4eec\u4f7f\u7528vector\u8fdb\u884c\u7ba1\u7406struct pollfd&#xff0c;\u5373\u7ba1\u7406fd&#xff0c;\u90a3\u4e48\u4e5f\u5c31\u610f\u5473\u7740\u7ba1\u7406fd\u7684\u6570\u7ec4_event_fds\u6211\u4eec\u53ef\u4ee5\u8fdb\u884cresize\u6269\u5bb9&#xff0c;\u5982\u679c\u4e0d\u60f3\u4f7f\u7528vecotr&#xff0c;\u800c\u662f\u4f7f\u7528\u539f\u751f\u6570\u7ec4&#xff0c;\u90a3\u4e48\u539f\u751f\u6570\u7ec4\u7684\u6269\u5bb9\u903b\u8f91\u5176\u5b9e\u5f88\u7b80\u5355&#xff0c;\u8fd9\u91cc\u5c0f\u7f16\u5c31\u4e0d\u518d\u7f16\u5199\u4e86&#xff0c;\u611f\u5174\u8da3\u7684\u8bfb\u8005\u53cb\u53cb\u53ef\u4ee5\u81ea\u884c\u7f16\u5199<\/li>\n<li>\u6839\u636e\u4e0d\u540c\u7684\u573a\u666f\u53ef\u4ee5\u9009\u62e9\u4e0d\u540c\u7684\u7b56\u7565&#xff0c;\u90a3\u4e48\u8fd9\u91cc\u5c0f\u7f16\u5c31\u7b80\u5355\u4e00\u70b9&#xff0c;\u91c7\u7528\u7b2c\u4e00\u79cd\u65b9\u6cd5&#xff0c;\u6570\u7ec4\u7ef4\u62a4\u56fa\u5b9a\u7684fd&#xff0c;\u5173\u95ed\u8fde\u63a5&#xff0c;\u5176\u5b9e\u6211\u4eec\u4e5f\u53ef\u4ee5\u786c\u7f16\u7801\u76f4\u63a5\u5c06fd_num_max\u8bbe\u7f6e\u5927\u4e00\u70b9\u6bd4\u5982\u521d\u59cb\u503c\u4e3a65535\u8fd9\u4e2a\u6837\u5b50&#xff0c;\u5f53\u7136\u8fd9\u91cc\u5c0f\u7f16\u7531\u4e8e\u6d4b\u8bd5\u73af\u5883\u4e2d\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u5e76\u6ca1\u6709\u90a3\u4e48\u591a&#xff0c;\u6240\u4ee5fd_num_max\u5c0f\u7f16\u5c31\u8bbe\u7f6e\u4e3a64\u4e86<\/li>\n<li>\u63a5\u4e0b\u6765\u5982\u679c\u904d\u5386_event_fds\u627e\u5230\u4e86\u4f4d\u7f6epos&#xff0c;\u90a3\u4e48\u6211\u4eec\u5c31\u5c06\u65b0\u83b7\u53d6\u4e0a\u6765\u7684\u8fde\u63a5\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26sock\u8bbe\u7f6e\u5230fd\u4e2d&#xff0c;\u5e76\u4e14\u5173\u5fc3\u8bfb\u4e8b\u4ef6\u5c06POLLIN\u8bbe\u7f6e\u5230events\u4e2d&#xff0c;\u5e76\u4e14\u987a\u5e26\u4e5f\u5c06revents\u4e5f\u521d\u59cb\u5316\u4e3anon_event\u8868\u793a\u6ca1\u6709\u4efb\u4f55\u4e8b\u4ef6\u5c31\u7eea&#xff0c;\u5176\u5b9e\u6211\u4eec\u8fd9\u91cc\u4e5f\u53ef\u4ee5\u4e0d\u521d\u59cb\u5316revents&#xff0c;\u4e3a\u4ec0\u4e48&#xff1f;<\/li>\n<li>\u56e0\u4e3a\u5c06\u6765\u5185\u6838\u53d1\u73b0\u7528\u6237\u8ba9\u6211\u5185\u6838\u5173\u5fc3\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u4e8b\u4ef6\u5982\u679c\u5c31\u7eea\u4e86&#xff0c;\u90a3\u4e48\u5c31\u4f7f\u7528\u5bf9\u5e94\u7684\u5b8f\u4e8b\u4ef6\u8986\u76d6revents\u7684\u503c&#xff0c;\u7531\u4e8e\u5185\u6838\u662f\u8986\u76d6\u5f0f\u7684\u5199\u5165revents&#xff0c;\u6240\u4ee5\u8fd9\u91cc\u6211\u4eec\u5c31\u7b97\u4e0d\u521d\u59cb\u5316revents\u4e5f\u6ca1\u6709\u95ee\u9898<\/li>\n<li>\u63a5\u4e0b\u6765\u8c03\u7528PrintFd&#xff0c;\u5c06\u5728\u7ebf\u7684fd\u6253\u5370\u51fa\u6765&#xff0c;\u6539\u52a8\u540c\u6837\u5f88\u5c0f&#xff0c;poll\u5bf9\u5e94\u7684fd\u6570\u7ec4\u53d8\u66f4\u4e86&#xff0c;\u6240\u4ee5\u83b7\u53d6fd\u7684\u65b9\u5f0f\u4fee\u6539\u4e3a_event_fds[i].fd\u5373\u53ef&#xff0c;\u63a5\u4e0b\u6765PrintFd\u8fd4\u56de\u540e&#xff0c;\u4e5f\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u5176\u5b83\u7684\u4e8b\u60c5&#xff0c;\u6bd4\u5982\u6253\u5370\u65e5\u5fd7&#xff0c;\u83b7\u53d6\u72b6\u6001\u7b49\u4efb\u52a1&#xff0c;\u8fd9\u91cc\u5c0f\u7f16\u5c31\u4e0d\u8fdb\u884c\u4e3e\u4f8b\u7f16\u5199\u4e86<\/li>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    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> _listensock<span class=\"token punctuation\">.<\/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\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;accept success, %s:%d, sock fd: %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> sock<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 number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> pos <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> pos<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\">if<\/span><span class=\"token punctuation\">(<\/span>_event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/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\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pos <span class=\"token operator\">&#061;&#061;<\/span> fd_num_max<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>Warning<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;server is full, close %d now&#034;<\/span><span class=\"token punctuation\">,<\/span> sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6269\u5bb9<\/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        _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sock<span class=\"token punctuation\">;<\/span><br \/>\n        _event_fds<span class=\"token punctuation\">[<\/span>pos<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        _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>revents <span class=\"token operator\">&#061;<\/span> non_event<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">PrintFd<\/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\">PrintFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;online fd list: &#034;<\/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><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <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>fd <span class=\"token operator\">!&#061;<\/span> defaultfd<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            cout <span class=\"token operator\">&lt;&lt;<\/span> _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    cout <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<li>\u90a3\u4e48\u5728\u6570\u636e\u8bfb\u53d6\u5668Recver\u4e2d&#xff0c;\u903b\u8f91\u662f\u5c06\u6570\u636e\u8bfb\u53d6\u4e0a\u6765&#xff0c;\u5982\u679cread\u7684\u8fd4\u56de\u503cn\u5927\u4e8e0\u6253\u5370\u6570\u636e\u5b57\u7b26\u4e32\u8fd9\u4e9b\u4e0d\u9700\u6539\u52a8&#xff0c;\u9700\u8981\u6539\u52a8\u7684\u662f\u5f53n\u7b49\u4e8e0\u7684\u65f6\u5019&#xff0c;\u6b64\u65f6\u5ba2\u6237\u7aef\u5df2\u7ecf\u5c06\u8fde\u63a5\u5173\u95ed\u4e86&#xff0c;\u6240\u4ee5\u6b64\u65f6\u6211\u670d\u52a1\u5668\u4e5f\u628a\u8fde\u63a5\u5173\u95ed&#xff0c;\u90a3\u4e48\u5c31\u8c03\u7528close\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u5373\u53ef&#xff0c;\u7136\u540e\u5c06\u8be5\u4f4d\u7f6e\u4e0a\u7684fd\u503c\u8bbe\u7f6e\u4e3adefaultfd\u8868\u793a\u7528\u6237\u4e0d\u518d\u5173\u5fc3\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26<\/li>\n<li>\u7531\u4e8epoll\u7ba1\u7406\u7684fd\u6570\u7ec4\u6539\u52a8\u4e86&#xff0c;\u6240\u4ee5\u5f53n\u7b49\u4e8e0\u7684\u65f6\u5019&#xff0c;\u9700\u8981\u6539\u52a8\u662f\u8be5\u4f4d\u7f6e\u7684\u8bfb\u53d6\u65b9\u5f0f\u4e3a_event_fds[pos].fd&#xff0c;\u540c\u7406n\u5c0f\u4e8e0\u7684\u60c5\u51b5\u4e5f\u9700\u8981\u7528\u6237\u4e0d\u518d\u5173\u5fc3\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u5373\u4e5f\u662f\u9700\u8981\u6539\u52a8\u8bfb\u53d6\u8be5\u4f4d\u7f6e\u7684\u8bfb\u53d6\u65b9\u5f0f\u4e3a_event_fds[pos].fd<\/li>\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> <span class=\"token keyword\">int<\/span> pos<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    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 operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a message: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> buffer <span class=\"token operator\">&lt;&lt;<\/span> endl<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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        _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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        _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260124001702-69740f7ec2610.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" 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class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;PollServer.hpp&#034;<\/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><\/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    unique_ptr<span class=\"token operator\">&lt;<\/span>PollServer<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">svr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token function\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    svr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    svr<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">Start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <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<h4>makefile<\/h4>\n<p>pollserver:Main.cc<br \/>\ng&#043;&#043; -o <span class=\"token variable\">$&#064;<\/span> $^ -std<span class=\"token operator\">&#061;<\/span>c&#043;&#043;11<br \/>\n.PHONY:clean<br \/>\nclean:<br \/>\n<span class=\"token function\">rm<\/span> -f pollserver<\/p>\n<h4>PollServer.hpp<\/h4>\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;sys\/select.h&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 macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;poll.h&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\">&#034;Log.hpp&#034;<\/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\">&#034;Socket.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">uint16_t<\/span> defaultport <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">8080<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> fd_num_max <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">64<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> defaultfd <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> non_event <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PollServer<\/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\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint16_t<\/span> port <span class=\"token operator\">&#061;<\/span> defaultport<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token operator\">:<\/span><span class=\"token function\">_port<\/span><span class=\"token punctuation\">(<\/span>port<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><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<span class=\"token punctuation\">;<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>events <span class=\"token operator\">&#061;<\/span> non_event<span class=\"token punctuation\">;<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>revents <span class=\"token operator\">&#061;<\/span> non_event<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\">Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Bind<\/span><span class=\"token punctuation\">(<\/span>_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/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\">Accepter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        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> _listensock<span class=\"token punctuation\">.<\/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\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">lg<\/span><span class=\"token punctuation\">(<\/span>Info<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;accept success, %s:%d, sock fd: %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> sock<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 number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> pos <span class=\"token operator\">&lt;<\/span> fd_num_max<span class=\"token punctuation\">;<\/span> pos<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\">if<\/span><span class=\"token punctuation\">(<\/span>_event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/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\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pos <span class=\"token operator\">&#061;&#061;<\/span> fd_num_max<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>Warning<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;server is full, close %d now&#034;<\/span><span class=\"token punctuation\">,<\/span> sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>sock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u6269\u5bb9<\/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            _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sock<span class=\"token punctuation\">;<\/span><br \/>\n            _event_fds<span class=\"token punctuation\">[<\/span>pos<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            _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>revents <span class=\"token operator\">&#061;<\/span> non_event<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">PrintFd<\/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\">Recver<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> pos<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        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 operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;get a message: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> buffer <span class=\"token operator\">&lt;&lt;<\/span> endl<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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            _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<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: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> fd<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            _event_fds<span class=\"token punctuation\">[<\/span>pos<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> defaultfd<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\">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><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\">Fd<\/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 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 punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/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\">\/\/ \u6570\u636e\u8bfb\u53d6\u5668<\/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 punctuation\">}<\/span><\/p>\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\">Fd<\/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><br \/>\n        <span class=\"token keyword\">for<\/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\">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                    cout <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><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">PrintFd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;online fd list: &#034;<\/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><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <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>fd <span class=\"token operator\">!&#061;<\/span> defaultfd<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                cout <span class=\"token operator\">&lt;&lt;<\/span> _event_fds<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">PollServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _listensock<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/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\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    Sock _listensock<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">uint16_t<\/span> _port<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">pollfd<\/span> _event_fds<span class=\"token punctuation\">[<\/span>fd_num_max<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>Log.hpp<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/span><\/span><\/p>\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;string&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;ctime&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;cstdio&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;cstdarg&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;sys\/types.h&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;sys\/stat.h&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;fcntl.h&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><\/p>\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\">SIZE<\/span> <span class=\"token expression\"><span class=\"token number\">1024<\/span><\/span><\/span><\/p>\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\">Info<\/span>   <span class=\"token expression\"><span class=\"token number\">0<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Debug<\/span>  <span class=\"token expression\"><span class=\"token number\">1<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Warning<\/span> <span class=\"token expression\"><span class=\"token number\">2<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Error<\/span>  <span class=\"token expression\"><span class=\"token number\">3<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Fatal<\/span>  <span class=\"token expression\"><span class=\"token number\">4<\/span><\/span><\/span><\/p>\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\">Screen<\/span> <span class=\"token expression\"><span class=\"token number\">1<\/span>     <\/span><span class=\"token comment\">\/\/\u8f93\u51fa\u5230\u5c4f\u5e55\u4e0a<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Onefile<\/span> <span class=\"token expression\"><span class=\"token number\">2<\/span>    <\/span><span class=\"token comment\">\/\/\u8f93\u51fa\u5230\u4e00\u4e2a\u6587\u4ef6\u4e2d<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Classfile<\/span> <span class=\"token expression\"><span class=\"token number\">3<\/span>  <\/span><span class=\"token comment\">\/\/\u6839\u636e\u4e8b\u4ef6\u7b49\u7ea7\u8f93\u51fa\u5230\u4e0d\u540c\u7684\u6587\u4ef6\u4e2d<\/span><\/span><\/p>\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\">LogFile<\/span> <span class=\"token string\">&#034;log.txt&#034;<\/span> <span class=\"token comment\">\/\/\u65e5\u5fd7\u540d\u79f0<\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Log<\/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\">Log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        printMethod <span class=\"token operator\">&#061;<\/span> Screen<span class=\"token punctuation\">;<\/span><br \/>\n        path <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;.\/log\/&#034;<\/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\">Enable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> method<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u6539\u53d8\u65e5\u5fd7\u6253\u5370\u65b9\u5f0f<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        printMethod <span class=\"token operator\">&#061;<\/span> method<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">Log<\/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<p>    std<span class=\"token double-colon punctuation\">::<\/span>string <span class=\"token function\">levelToString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> level<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">switch<\/span><span class=\"token punctuation\">(<\/span>level<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Info<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Info&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Debug<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Debug&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Warning<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Warning&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Error<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Error&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Fatal<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Fatal&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;&#034;<\/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 keyword\">operator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> level<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> format<span class=\"token punctuation\">,<\/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 comment\">\/\/\u9ed8\u8ba4\u90e8\u5206 &#061; \u65e5\u5fd7\u7b49\u7ea7 &#043; \u65e5\u5fd7\u65f6\u95f4<\/span><br \/>\n        time_t t <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">time<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">tm<\/span><span class=\"token operator\">*<\/span> ctime <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">localtime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>t<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> leftbuffer<span class=\"token punctuation\">[<\/span>SIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">snprintf<\/span><span class=\"token punctuation\">(<\/span>leftbuffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>leftbuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;[%s][%d-%d-%d %d:%d:%d]&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">levelToString<\/span><span class=\"token punctuation\">(<\/span>level<span class=\"token punctuation\">)<\/span><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><br \/>\n        ctime<span class=\"token operator\">-&gt;<\/span>tm_year <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1900<\/span><span class=\"token punctuation\">,<\/span> ctime<span class=\"token operator\">-&gt;<\/span>tm_mon <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> ctime<span class=\"token operator\">-&gt;<\/span>tm_mday<span class=\"token punctuation\">,<\/span><br \/>\n        ctime<span class=\"token operator\">-&gt;<\/span>tm_hour<span class=\"token punctuation\">,<\/span> ctime<span class=\"token operator\">-&gt;<\/span>tm_min<span class=\"token punctuation\">,<\/span> ctime<span class=\"token operator\">-&gt;<\/span>tm_sec<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        va_list s<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">va_start<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">,<\/span> format<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> rightbuffer<span class=\"token punctuation\">[<\/span>SIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">vsnprintf<\/span><span class=\"token punctuation\">(<\/span>rightbuffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>rightbuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> format<span class=\"token punctuation\">,<\/span> s<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">va_end<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">char<\/span> logtxt<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">*<\/span> SIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">snprintf<\/span><span class=\"token punctuation\">(<\/span>logtxt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>logtxt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;%s %s&#034;<\/span><span class=\"token punctuation\">,<\/span> leftbuffer<span class=\"token punctuation\">,<\/span> rightbuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">printLog<\/span><span class=\"token punctuation\">(<\/span>level<span class=\"token punctuation\">,<\/span> logtxt<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\">printLog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> level<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> logtxt<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">switch<\/span><span class=\"token punctuation\">(<\/span>printMethod<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> Screen<span class=\"token operator\">:<\/span><br \/>\n                std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> logtxt <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/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> Onefile<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token function\">printOneFile<\/span><span class=\"token punctuation\">(<\/span>LogFile<span class=\"token punctuation\">,<\/span> logtxt<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 keyword\">case<\/span> Classfile<span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token function\">printClassFile<\/span><span class=\"token punctuation\">(<\/span>level<span class=\"token punctuation\">,<\/span> logtxt<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 keyword\">default<\/span><span class=\"token operator\">:<\/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><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">printOneFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> logname<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> logtxt<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>string _logname <span class=\"token operator\">&#061;<\/span> path <span class=\"token operator\">&#043;<\/span> logname<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">open<\/span><span class=\"token punctuation\">(<\/span>_logname<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> O_WRONLY <span class=\"token operator\">|<\/span> O_CREAT <span class=\"token operator\">|<\/span> O_APPEND<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0666<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>fd <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> logtxt<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> logtxt<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 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><\/p>\n<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">printClassFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> level<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> logtxt<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>string filename <span class=\"token operator\">&#061;<\/span> LogFile<span class=\"token punctuation\">;<\/span><br \/>\n        filename <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token string\">&#034;.&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        filename <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token function\">levelToString<\/span><span class=\"token punctuation\">(<\/span>level<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">printOneFile<\/span><span class=\"token punctuation\">(<\/span>filename<span class=\"token punctuation\">,<\/span> logtxt<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <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> printMethod<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>string path<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Log lg<span class=\"token punctuation\">;<\/span><\/p>\n<h4>Socket.hpp<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once<\/span><\/span><\/p>\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;string&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;cstring&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;sys\/types.h&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;sys\/socket.h&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;netinet\/in.h&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;arpa\/inet.h&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\">&#034;Log.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> backlog <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">enum<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    SocketErr <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    BindErr<span class=\"token punctuation\">,<\/span><br \/>\n    ListenErr<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\">Sock<\/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\">Sock<\/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<p>    <span class=\"token keyword\">void<\/span> <span class=\"token function\">Socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        sockfd_ <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_STREAM<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>sockfd_ <span class=\"token operator\">&lt;<\/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>Fatal<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;socket error, %s : %d&#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> errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span>SocketErr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> opt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">setsockopt<\/span><span class=\"token punctuation\">(<\/span>sockfd_<span class=\"token punctuation\">,<\/span> SOL_SOCKET<span class=\"token punctuation\">,<\/span> SO_REUSEPORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>opt<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>opt<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\">Bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">uint16_t<\/span> port<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> local<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>local<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>local<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        local<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n        local<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        local<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> INADDR_ANY<span class=\"token punctuation\">;<\/span><br \/>\n        socklen_t len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>local<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd_<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>local<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/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>Fatal<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;bind error, %s : %d&#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> errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span>BindErr<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\">Listen<\/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><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd_<span class=\"token punctuation\">,<\/span> backlog<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/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>Fatal<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;listen error, %s : %d&#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> errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span>ListenErr<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\">int<\/span> <span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">*<\/span> clientip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span><span class=\"token operator\">*<\/span> clientport<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> peer<span class=\"token punctuation\">;<\/span><br \/>\n        socklen_t len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> newfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>sockfd_<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>peer<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>len<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><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;accept error, %s : %d&#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> errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">char<\/span> ipstr<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">inet_ntop<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ipstr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>ipstr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token operator\">*<\/span>clientip <span class=\"token operator\">&#061;<\/span> ipstr<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token operator\">*<\/span>clientport <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">ntohs<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">.<\/span>sin_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> newfd<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\">Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> serverip<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">uint16_t<\/span> serverport<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> peer<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>peer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        peer<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n        peer<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>serverport<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">inet_pton<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> serverip<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> <span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        socklen_t len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>sockfd_<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>peer<span class=\"token punctuation\">,<\/span> len<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\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/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 double-colon punctuation\">::<\/span>cerr <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;connect to &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> serverip <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token char\">&#039;:&#039;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> serverport <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;error&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/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\">return<\/span> <span class=\"token boolean\">true<\/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\">Close<\/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>sockfd_ <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 function\">close<\/span><span class=\"token punctuation\">(<\/span>sockfd_<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\">int<\/span> <span class=\"token function\">Fd<\/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> sockfd_<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">Sock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/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> sockfd_<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u603b\u7ed3<\/h3>\n<p>\u4ee5\u4e0a\u5c31\u662f\u4eca\u5929\u7684\u535a\u5ba2\u5185\u5bb9\u5566,\u5e0c\u671b\u5bf9\u8bfb\u8005\u670b\u53cb\u4eec\u6709\u5e2e\u52a9 \u6c34\u6ef4\u77f3\u7a7f&#xff0c;\u575a\u6301\u5c31\u662f\u80dc\u5229&#xff0c;\u8bfb\u8005\u670b\u53cb\u4eec\u53ef\u4ee5\u70b9\u4e2a\u5173\u6ce8 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