{"id":71198,"date":"2026-02-03T12:04:57","date_gmt":"2026-02-03T04:04:57","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/71198.html"},"modified":"2026-02-03T12:04:57","modified_gmt":"2026-02-03T04:04:57","slug":"linux%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e8%b8%a9%e5%9d%91%ef%bc%9a%e5%a4%9a%e7%ba%bf%e7%a8%8b%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%e4%b8%ad%e6%96%87%e4%bb%b6%e6%8f%8f%e8%bf%b0%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/71198.html","title":{"rendered":"Linux\u7f51\u7edc\u7f16\u7a0b\u8e29\u5751\uff1a\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u6b63\u786e\u4f20\u9012\u65b9\u5f0f"},"content":{"rendered":"<p>\u5728\u7f16\u5199\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\uff08Multi-threaded Server\uff09\u65f6\uff0c\u6700\u5bb9\u6613\u8ba9\u65b0\u624b\u201c\u7ffb\u8f66\u201d\u7684\u4e00\u4e2a\u7ec6\u8282\u5c31\u662f\u5982\u4f55\u5c06\u4e3b\u7ebf\u7a0b\u63a5\u6536\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff08File Descriptor, fd\uff09\u6b63\u786e\u5730\u4f20\u9012\u7ed9\u5b50\u7ebf\u7a0b\u3002<\/p>\n<p>\u5f88\u591a\u521d\u5b66\u8005\u4f1a\u53d1\u73b0\uff0c\u660e\u660e\u4ee3\u7801\u903b\u8f91\u770b\u8d77\u6765\u6ca1\u95ee\u9898\uff0c\u4f46\u5f53\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8fde\u63a5\u65f6\uff0c\u6d88\u606f\u5374\u53d1\u9519\u4e71\u4e86\uff08\u6bd4\u5982\u5ba2\u6237\u7aefA\u53d1\u7684\u6d88\u606f\u88ab\u670d\u52a1\u5668\u56de\u4f20\u7ed9\u4e86\u5ba2\u6237\u7aefB\uff09\u3002\u672c\u6587\u5c06\u57fa\u4e8e\u8bfe\u5802\u7b14\u8bb0\uff0c\u6df1\u5ea6\u89e3\u6790\u8fd9\u4e2a\u7ecf\u5178\u7684\u201c\u5185\u5b58\u5171\u4eab\u9677\u9631\u201d\uff0c\u5e76\u63d0\u4f9b\u6b63\u786e\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<h3>\u4e00\u3001 \u95ee\u9898\u80cc\u666f\uff1a\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u4f20\u5730\u5740\uff1f<\/h3>\n<h4>1. \u5178\u578b\u9519\u8bef\u573a\u666f<\/h4>\n<p>\u5728\u4e3b\u7ebf\u7a0b\u7684 while \u5faa\u73af\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u8fd9\u6837\u505a\uff1a<\/p>\n<li>\u8c03\u7528 accept() \u963b\u585e\u7b49\u5f85\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 cfd\u3002<\/li>\n<li>\u8c03\u7528 pthread_create() \u521b\u5efa\u5b50\u7ebf\u7a0b\u3002<\/li>\n<li>\u9519\u8bef\u64cd\u4f5c\uff1a\u5c06 cfd \u7684\u5730\u5740\uff08&amp;cfd\uff09\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b50\u7ebf\u7a0b\u3002<\/li>\n<h4>2. \u539f\u56e0\u6df1\u5ea6\u5256\u6790<\/h4>\n<p>\u8fd9\u6d89\u53ca\u5230\u4e86\u8fdb\u7a0b\u4e0e\u7ebf\u7a0b\u7684\u5185\u5b58\u6a21\u578b\u5dee\u5f02\uff1a<\/p>\n<ul>\n<li>\u8fdb\u7a0b\uff08Process\uff09\uff1a\u62e5\u6709\u72ec\u7acb\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u3002\u4fee\u6539\u4e00\u4e2a\u8fdb\u7a0b\u7684\u53d8\u91cf\u4e0d\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a\u8fdb\u7a0b\uff08\u5199\u65f6\u590d\u5236\uff09\u3002<\/li>\n<li>\u7ebf\u7a0b\uff08Thread\uff09\uff1a\u5171\u4eab\u540c\u4e00\u4e2a\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\uff08\u5806\u3001\u5168\u5c40\u53d8\u91cf\u7b49\uff09\u3002<\/li>\n<\/ul>\n<p>\u707e\u96be\u53d1\u751f\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<li>\u65f6\u523b T1\uff1a\u4e3b\u7ebf\u7a0b accept \u6210\u529f\uff0ccfd \u53d8\u91cf\u88ab\u8d4b\u503c\u4e3a 3\uff08\u4ee3\u8868\u5ba2\u6237\u7aef A\uff09\u3002<\/li>\n<li>\u65f6\u523b T2\uff1a\u4e3b\u7ebf\u7a0b\u8c03\u7528 pthread_create\uff0c\u4f20\u5165 &amp;cfd\u3002<\/li>\n<li>\u65f6\u523b T3\uff1a\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u5faa\u73af\uff0c\u518d\u6b21 accept \u6210\u529f\uff0ccfd \u53d8\u91cf\u88ab\u66f4\u65b0\u4e3a 4\uff08\u4ee3\u8868\u5ba2\u6237\u7aef B\uff09\u3002<\/li>\n<li>\u65f6\u523b T4\uff1a\u5b50\u7ebf\u7a0b A \u5f00\u59cb\u8fd0\u884c\uff0c\u901a\u8fc7\u4f20\u5165\u7684\u5730\u5740 &amp;cfd \u53bb\u8bfb\u53d6\u6570\u636e\u3002\u6b64\u65f6\u5b83\u8bfb\u5230\u7684\u662f\u88ab\u4fee\u6539\u540e\u7684\u503c 4\u3002<\/li>\n<p>\u7ed3\u679c\uff1a\u5b50\u7ebf\u7a0b A \u672c\u8be5\u670d\u52a1\u5ba2\u6237\u7aef A\uff08fd=3\uff09\uff0c\u7ed3\u679c\u5374\u62ff\u5230\u4e86 fd=4\uff0c\u5bfc\u81f4\u5b83\u9519\u8bef\u5730\u4e0e\u5ba2\u6237\u7aef B \u8fdb\u884c\u4e86\u901a\u4fe1\uff0c\u6216\u8005\u53d1\u751f\u201c\u4e32\u53f0\u201d\u73b0\u8c61\u3002<\/p>\n<hr>\n<h3>\u4e8c\u3001 \u89e3\u51b3\u65b9\u6848\uff1a\u6784\u5efa\u63cf\u8ff0\u7b26\u7ba1\u7406\u6570\u7ec4<\/h3>\n<p>\u4e3a\u4e86\u907f\u514d\u4e0a\u8ff0\u7ade\u6001\u6761\u4ef6\uff08Race Condition\uff09\uff0c\u6211\u4eec\u9700\u8981\u4fdd\u8bc1\u6bcf\u4e2a\u5b50\u7ebf\u7a0b\u62ff\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u5b58\u50a8\u5728\u72ec\u7acb\u5185\u5b58\u533a\u57df\u4e2d\u7684\uff0c\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n<p>\u6838\u5fc3\u601d\u8def\uff1a<\/p>\n<li>\u5b9a\u4e49\u4e00\u4e2a\u5168\u5c40\u7ed3\u6784\u4f53\u6570\u7ec4\uff08\u6216\u6574\u578b\u6570\u7ec4\uff09\u3002<\/li>\n<li>\u4e3b\u7ebf\u7a0b accept \u6210\u529f\u540e\uff0c\u904d\u5386\u6570\u7ec4\u627e\u5230\u4e00\u4e2a\u201c\u7a7a\u95f2\u4f4d\u7f6e\u201d\u3002<\/li>\n<li>\u5c06 cfd \u5b58\u5165\u8be5\u4f4d\u7f6e\u3002<\/li>\n<li>\u5c06\u8be5\u6570\u7ec4\u5143\u7d20\u7684\u5730\u5740\u4f20\u9012\u7ed9\u5b50\u7ebf\u7a0b\u3002<\/li>\n<p>\u8fd9\u6837\uff0c\u5373\u4f7f\u4e3b\u7ebf\u7a0b\u7684 cfd \u5c40\u90e8\u53d8\u91cf\u53d8\u4e86\uff0c\u6570\u7ec4\u4e2d\u5b58\u50a8\u7684\u503c\u4e5f\u4e0d\u4f1a\u53d8\u3002<\/p>\n<hr>\n<h3>\u4e09\u3001 \u4ee3\u7801\u5b9e\u6218<\/h3>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u3001\u53ef\u8fd0\u884c\u7684\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\u4ee3\u7801\u6848\u4f8b\u3002<\/p>\n<h4>1. \u4ee3\u7801\u5b9e\u73b0 (server_fixed.c)<\/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;stdio.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;stdlib.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;string.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\">&lt;pthread.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;ctype.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\">MAX_CONN<\/span> <span class=\"token expression\"><span class=\"token number\">1024<\/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\">PORT<\/span> <span class=\"token expression\"><span class=\"token number\">8888<\/span><\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u4e00\u4e2a\u7ed3\u6784\u4f53\u6765\u5b58\u50a8\u6bcf\u4e2a\u8fde\u63a5\u7684\u4fe1\u606f<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">SockInfo<\/span> <span class=\"token punctuation\">{<\/p>\n<p>   <\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">;<\/span>                 <span class=\"token comment\">\/\/ \u901a\u4fe1\u6587\u4ef6\u63cf\u8ff0\u7b26<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> addr<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f\uff08\u53ef\u9009\uff0c\u65b9\u4fbf\u65e5\u5fd7\u6253\u5370\uff09<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5168\u5c40\u6570\u7ec4\uff0c\u7528\u4e8e\u7ba1\u7406\u6240\u6709\u8fde\u63a5<\/span><br \/>\n<span class=\"token comment\">\/\/ \u521d\u59cb\u5316\u65f6\u9700\u8981\u5c06fd\u8bbe\u4e3a-1\uff0c\u8868\u793a\u7a7a\u95f2<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">SockInfo<\/span> infos<span class=\"token punctuation\">[<\/span>MAX_CONN<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <\/p>\n<p><span class=\"token comment\">\/\/ \u5b50\u7ebf\u7a0b\u7684\u5de5\u4f5c\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">worker<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> arg<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/p>\n<p>   <\/span><br \/>\n    <span class=\"token comment\">\/\/ 1. \u5c06\u53c2\u6570\u5f3a\u8f6c\u56de\u7ed3\u6784\u4f53\u6307\u9488<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">SockInfo<\/span><span class=\"token operator\">*<\/span> pinfo <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">SockInfo<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>arg<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u7f16\u5199\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\uff08Multi-threaded Server\uff09\u65f6\uff0c\u6700\u5bb9\u6613\u8ba9\u65b0\u624b\u201c\u7ffb\u8f66\u201d\u7684\u4e00\u4e2a\u7ec6\u8282\u5c31\u662f\u5982\u4f55\u5c06\u4e3b\u7ebf\u7a0b\u63a5\u6536\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff08File Descriptor, fd\uff09\u6b63\u786e\u5730\u4f20\u9012\u7ed9\u5b50\u7ebf\u7a0b\u3002<br \/>\n\u5f88\u591a\u521d\u5b66\u8005\u4f1a\u53d1\u73b0\uff0c\u660e\u660e\u4ee3\u7801\u903b\u8f91\u770b\u8d77\u6765\u6ca1\u95ee\u9898\uff0c\u4f46\u5f53\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8fde\u63a5\u65f6\uff0c\u6d88\u606f\u5374\u53d1\u9519\u4e71\u4e86\uff08\u6bd4\u5982\u5ba2\u6237\u7aefA\u53d1\u7684\u6d88\u606f\u88ab\u670d\u52a1\u5668\u56de\u4f20\u7ed9\u4e86\u5ba2\u6237\u7aefB\uff09\u3002\u672c\u6587\u5c06\u57fa\u4e8e\u8bfe\u5802\u7b14\u8bb0\uff0c\u6df1\u5ea6\u89e3\u6790\u8fd9\u4e2a\u7ecf\u5178\u7684\u201c\u5185\u5b58\u5171\u4eab\u9677\u9631\u201d\uff0c\u5e76\u63d0\u4f9b\u6b63\u786e\u7684\u89e3\u51b3\u65b9\u6848\u3002<br \/>\n\u4e00\u3001 \u95ee\u9898\u80cc\u666f\uff1a\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u4f20\u5730\u5740\uff1f<br \/>\n1. \u5178\u578b\u9519\u8bef\u573a\u666f 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property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux\u7f51\u7edc\u7f16\u7a0b\u8e29\u5751\uff1a\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u6b63\u786e\u4f20\u9012\u65b9\u5f0f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u5728\u7f16\u5199\u591a\u7ebf\u7a0b\u5e76\u53d1\u670d\u52a1\u5668\uff08Multi-threaded Server\uff09\u65f6\uff0c\u6700\u5bb9\u6613\u8ba9\u65b0\u624b\u201c\u7ffb\u8f66\u201d\u7684\u4e00\u4e2a\u7ec6\u8282\u5c31\u662f\u5982\u4f55\u5c06\u4e3b\u7ebf\u7a0b\u63a5\u6536\u5230\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff08File Descriptor, fd\uff09\u6b63\u786e\u5730\u4f20\u9012\u7ed9\u5b50\u7ebf\u7a0b\u3002 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