{"id":18482,"date":"2025-04-19T00:53:07","date_gmt":"2025-04-18T16:53:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/18482.html"},"modified":"2025-04-19T00:53:07","modified_gmt":"2025-04-18T16:53:07","slug":"%e5%9f%ba%e4%ba%8eiocp%e6%a8%a1%e5%9e%8b%e7%9a%84%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%8e%a5%e5%be%85%e6%b5%81%e7%a8%8b%e8%ae%be%e8%ae%a1%e4%b8%8e%e5%ae%9e%e7%8e%b0-%e4%bb%a5%e5%a5%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/18482.html","title":{"rendered":"\u57fa\u4e8eIOCP\u6a21\u578b\u7684\u670d\u52a1\u5668\u63a5\u5f85\u6d41\u7a0b\u8bbe\u8ba1\u4e0e\u5b9e\u73b0\u2014\u2014\u4ee5\u5976\u8336\u5e97\u8fd0\u8425\u4e3a\u9690\u55bb"},"content":{"rendered":"

\u4ece\u5976\u8336\u5e97\u8fd0\u8425\u770bIOCP\u670d\u52a1\u5668\u8bbe\u8ba1\uff1a\u65b0\u5ba2\u6237\u63a5\u5f85\u5168\u6d41\u7a0b\u62c6\u89e3<\/h2>\n
\n

\u5f15\u8a00\uff1a\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u8bbe\u8ba1\u7684\u6838\u5fc3\u6311\u6218<\/h4>\n

\u5728\u9ad8\u5e76\u53d1\u7f51\u7edc\u7f16\u7a0b\u4e2d\uff0cIOCP\uff08Input\/Output Completion Port\uff09\u6a21\u578b\u51ed\u501f\u5176\u5353\u8d8a\u7684\u6027\u80fd\u8868\u73b0\uff0c\u5df2\u6210\u4e3aWindows\u5e73\u53f0\u6784\u5efa\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u9996\u9009\u65b9\u6848\u3002\u672c\u6587\u5c06\u4ee5\u7f51\u7ea2\u5976\u8336\u5e97\u4e3a\u9690\u55bb\uff0c\u6df1\u5165\u89e3\u6790\u57fa\u4e8eIOCP\u6a21\u578b\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u7ba1\u7406\u673a\u5236\uff0c\u63ed\u793a\u5176\u8bbe\u8ba1\u7cbe\u9ad3\u3002<\/p>\n

\n

\u4e00\u3001\u6280\u672f\u5168\u666f\u56fe\u89e3\u6784<\/h3>\n\n\n \u6280\u672f\u7ec4\u4ef6
\n \u5976\u8336\u5e97\u7c7b\u6bd4
\n \u6838\u5fc3\u529f\u80fd
\n \u5173\u952eAPI\/\u673a\u5236
\n <\/tr>\n\n\n\n\n\n\n\n\n
\u76d1\u542c\u5957\u63a5\u5b57<\/td>\n\u5e97\u94fa\u5927\u95e8<\/td>\n\u6301\u7eed\u63a5\u6536\u65b0\u8fde\u63a5<\/td>\nlisten()<\/td>\n<\/tr>\n
accept()<\/td>\n\u524d\u53f0\u670d\u52a1\u5458<\/td>\n\u5efa\u7acb\u5177\u4f53\u8fde\u63a5<\/td>\nWSAAccept()<\/td>\n<\/tr>\n
ContextObject<\/td>\n\u7535\u5b50\u4f1a\u5458\u5361<\/td>\n\u5b58\u50a8\u5ba2\u6237\u4fe1\u606f<\/td>\n\u5185\u5b58\u6c60\u7ba1\u7406<\/td>\n<\/tr>\n
\u5b8c\u6210\u7aef\u53e3<\/td>\n\u540e\u53a8\u4efb\u52a1\u770b\u677f<\/td>\n\u4efb\u52a1\u8c03\u5ea6\u4e2d\u5fc3<\/td>\nCreateIoCompletionPort<\/td>\n<\/tr>\n
\u5de5\u4f5c\u7ebf\u7a0b<\/td>\n\u5976\u8336\u5e08\u5085\u56e2\u961f<\/td>\n\u5e76\u53d1\u5904\u7406\u8bf7\u6c42<\/td>\nGetQueuedCompletionStatus<\/td>\n<\/tr>\n
TCP\u4fdd\u6d3b\u673a\u5236<\/td>\n\u987e\u5ba2\u5fc3\u8df3\u68c0\u6d4b<\/td>\n\u8fde\u63a5\u72b6\u6001\u76d1\u63a7<\/td>\nsetsockopt()<\/td>\n<\/tr>\n
\u4e34\u754c\u533a<\/td>\n\u6536\u94f6\u53f0\u62bd\u5c49\u9501<\/td>\n\u7ebf\u7a0b\u5b89\u5168\u4fdd\u62a4<\/td>\nCRITICAL_SECTION<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n\u2502 \u5976\u8336\u5e97\u524d\u5385 \u2502 \u2502 \u540e\u53a8\u7cfb\u7edf \u2502
\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524 \u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524
\n\u2502 \u5927\u95e8\u76d1\u542c \u2502 \u987e\u5ba2\u63a5\u5f85\u533a \u2502 \u2502 \u4efb\u52a1\u770b\u677f \u2502 \u5976\u8336\u5236\u4f5c\u533a \u2502
\n\u2502 (ListenSocket) \u2502 (accept()) \u2502\u25c4\u2500\u2500\u2510 \u2502 (IOCP) \u2502 (\u5de5\u4f5c\u7ebf\u7a0b\u6c60) \u2502
\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u2502 \u2502 \u2502 \u2502 \u2502
\n \u25bc \u25bc \u2502 \u25bc \u25bc
\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n\u2502 \u5ba2\u6237\u6863\u6848\u7ba1\u7406 \u2502 \u2502 TCP\u4fdd\u6d3b\u68c0\u6d4b \u2502\u2514\u2500\u2500\u2524 \u8ba2\u5355\u5206\u6d3e\u7cfb\u7edf \u2502 \u2502 \u5f02\u6b65IO\u5904\u7406 \u2502
\n\u2502 (ContextObject)\u2502(setsockopt) \u2502 \u2502 (PostQueued)\u2502 (WSARecv\/Send)
\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u2502 \u2502 \u2502 \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u25bc \u25bc
\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 \u8fde\u63a5\u94fe\u8868\u7ba1\u7406 \u2502 \u2502 \u8d44\u6e90\u56de\u6536\u4e2d\u5fc3 \u2502
\n \u2502 (\u4e34\u754c\u533a\u4fdd\u62a4) \u2502 \u2502 (CloseHandle) \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

\n

\u4e8c\u3001\u670d\u52a1\u5668\u63a5\u5f85\u5ba2\u6237\u5177\u4f53\u6d41\u7a0b<\/h3>\n

\uff08\u4e00\uff09\u95e8\u53e3\u8fce\u5ba2\uff08Accept\uff09<\/h4>\n
  • \u76d1\u542c\u5957\u63a5\u5b57\uff1a\u5728\u670d\u52a1\u5668\u7aef\uff0c\u76d1\u542c\u5957\u63a5\u5b57\u5c31\u5982\u540c\u5976\u8336\u5e97\u655e\u5f00\u7684\u5927\u95e8\uff08m_ListenSocket\uff09\uff0c\u59cb\u7ec8\u4fdd\u6301\u5f00\u542f\u72b6\u6001\uff0c\u65f6\u523b\u7b49\u5f85\u7740\u5ba2\u6237\uff08\u987e\u5ba2\uff09\u7684\u5230\u6765\u3002\u5b83\u662f\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5\u7684\u5165\u53e3\uff0c\u6301\u7eed\u76d1\u542c\u7f51\u7edc\u7aef\u53e3\uff0c\u6355\u6349\u5ba2\u6237\u7aef\u53d1\u8d77\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n
  • accept()\uff1a\u5f53\u6709\u5ba2\u6237\u7aef\u50cf\u987e\u5ba2\u4e00\u6837\u63a8\u95e8\u8fdb\u5165\u65f6\uff0caccept()\u51fd\u6570\u4fbf\u5982\u540c\u70ed\u60c5\u7684\u670d\u52a1\u5458\uff0c\u8fc5\u901f\u505a\u51fa\u54cd\u5e94\u3002\u5b83\u4e3a\u6bcf\u4e2a\u65b0\u5230\u6765\u7684\u5ba2\u6237\u7aef\u5206\u914d\u4e00\u4e2a\u4e13\u5c5e\u7684\u63a5\u6536\u901a\u9053\uff08ClientSocket\uff09\uff0c\u8fd9\u4e2a\u901a\u9053\u5c31\u50cf\u662f\u987e\u5ba2\u5728\u5e97\u5185\u7684\u4e13\u5c5e\u5ea7\u4f4d\uff0c\u7528\u4e8e\u540e\u7eed\u7684\u6570\u636e\u4f20\u8f93\u3002\u540c\u65f6\uff0c\u670d\u52a1\u5458\u8fd8\u4f1a\u4ed4\u7ec6\u767b\u8bb0\u987e\u5ba2\u7684\u5ea7\u4f4d\u53f7\uff0c\u5bf9\u5e94\u5230\u6280\u672f\u5c42\u9762\uff0c\u5c31\u662f\u8bb0\u5f55\u5ba2\u6237\u7aef\u7684IP\u5730\u5740\uff08ClientAddress\uff09\u3002<\/li>\n
  • \u5931\u8d25\u5904\u7406\uff1a\u5018\u82e5\u670d\u52a1\u5458\u7531\u4e8e\u4e1a\u52a1\u7e41\u5fd9\uff0c\u65e0\u6cd5\u53ca\u65f6\u63a5\u5f85\u65b0\u987e\u5ba2\uff08\u5373accept\u51fd\u6570\u6267\u884c\u5931\u8d25\uff09\uff0c\u6b64\u65f6\u670d\u52a1\u5668\u4f1a\u91c7\u53d6\u76f4\u63a5\u5173\u95ed\u8fde\u63a5\u7684\u63aa\u65bd\uff0c\u5c31\u5982\u540c\u5976\u8336\u5e97\u6682\u65f6\u5173\u95e8\uff0c\u4e0d\u518d\u63a5\u5f85\u65b0\u987e\u5ba2\u3002<\/li>\n

    \uff08\u4e8c\uff09\u5efa\u7acb\u5ba2\u6237\u6863\u6848\uff08ContextObject\uff09<\/h4>\n

    \/\/ \u5185\u5b58\u6c60\u7ba1\u7406\u7cfb\u7edf\uff08\u524d\u53f0\u6536\u94f6\u7cfb\u7edf\uff09\u7ed9\u987e\u5ba2\u53d1\u4e00\u5f20\u4f1a\u5458\u5361
    \nPCONTEXT_OBJECT ContextObject = AllocateContextObject();<\/p>\n

  • \u4f1a\u5458\u5361\u5185\u5bb9\uff1a\u8fd9\u5f20\u4f1a\u5458\u5361\uff08ContextObject\uff09\u5305\u542b\u4e86\u5173\u952e\u4fe1\u606f\u3002\u5176\u4e2d\uff0cClientSocket\u4f5c\u4e3a\u987e\u5ba2\u7684\u63a5\u6536\u901a\u9053\uff0c\u540e\u7eed\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u5c31\u5982\u540c\u5976\u8336\u5e97\u901a\u8fc7\u8fd9\u4e2a\u901a\u9053\u7ed9\u987e\u5ba2\u9001\u5976\u8336\u3002\u800cReceiveBuffer\u5219\u662f\u987e\u5ba2\u63a5\u6536\u4fe1\u606f\u7684\u5b58\u50a8\u4f4d\u7f6e\uff0c\u7c7b\u4f3c\u4e8e\u987e\u5ba2\u7528\u6765\u88c5\u6536\u5230\u6570\u636e\u7684\u5bb9\u5668\u3002<\/li>\n
  • \u5185\u5b58\u5206\u914d\u4e0e\u5904\u7406\uff1a\u524d\u53f0\u670d\u52a1\u5458\uff08\u4e3b\u7ebf\u7a0b\uff09\u4ece\u67dc\u53f0\u62bd\u5c49\uff08\u5185\u5b58\u6c60\uff09\u4e2d\u53d6\u51fa\u7a7a\u767d\u4f1a\u5458\u5361\u3002\u82e5\u62bd\u5c49\u5df2\u7a7a\uff0c\u610f\u5473\u7740\u5185\u5b58\u4e0d\u8db3\uff0c\u6b64\u65f6\u670d\u52a1\u5668\u4f1a\u7acb\u5373\u544a\u77e5\u5ba2\u6237\u7aef\u201c\u4eca\u65e5\u6682\u505c\u8425\u4e1a\u201d\uff0c\u5373\u5173\u95ed\u4e0e\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002\u82e5\u6210\u529f\u53d1\u653e\u4f1a\u5458\u5361\uff0c\u670d\u52a1\u5668\u4f1a\u50cf\u6fc0\u5149\u96d5\u523b\u4e00\u6837\uff0c\u5c06\u5ba2\u6237\u4fe1\u606f\u51c6\u786e\u5730\u7ed1\u5b9a\u5230\u4f1a\u5458\u5361\u4e0a\uff0c\u4e5f\u5c31\u662f\u5c06socket\u548c\u7f13\u51b2\u533a\u8fdb\u884c\u7ed1\u5b9a\u3002<\/li>\n

    \uff08\u4e09\uff09\u8fde\u63a5\u4efb\u52a1\u4e2d\u5fc3\uff08\u5b8c\u6210\u7aef\u53e3\uff09<\/h4>\n

    CreateIoCompletionPort(…);<\/p>\n

  • \u5b8c\u6210\u7aef\u53e3\u673a\u5236\uff1a\u4f7f\u7528CreateIoCompletionPort\u51fd\u6570\uff0c\u5c06\u987e\u5ba2\u7684\u4fe1\u606f\uff08ContextObject\uff09\u548c\u901a\u9053\uff08ClientSocket\uff09\u767b\u8bb0\u5230\u4efb\u52a1\u4e2d\u5fc3\uff08\u5b8c\u6210\u7aef\u53e3\uff09\u4e2d\u3002\u8fd9\u91cc\u7684\u5b8c\u6210\u7aef\u53e3\uff08IOCP\uff09\u5c31\u597d\u6bd4\u5976\u8336\u5e97\u7684\u540e\u53a8\u4efb\u52a1\u770b\u677f\u3002\u670d\u52a1\u5458\u4f1a\u628a\u65b0\u987e\u5ba2\u7684\u8ba2\u5355\uff08ContextObject\uff09\u8d34\u5230\u770b\u677f\u4e0a\uff0c\u4e5f\u5c31\u662f\u5c06\u5176\u5173\u8054\u5230\u5b8c\u6210\u7aef\u53e3\u3002\u800c\u6240\u6709\u7684\u5976\u8336\u5e08\u5085\uff08\u5de5\u4f5c\u7ebf\u7a0b\uff09\u90fd\u4f1a\u5bc6\u5207\u5173\u6ce8\u8fd9\u4e2a\u770b\u677f\uff0c\u4e00\u65e6\u6709\u65b0\u8ba2\u5355\uff0c\u4fbf\u4f1a\u4e89\u62a2\u5904\u7406\u3002<\/li>\n
  • \u5931\u8d25\u5904\u7406\uff1a\u5982\u679c\u770b\u677f\u5df2\u7ecf\u8d34\u6ee1\uff0c\u65e0\u6cd5\u518d\u5f20\u8d34\u65b0\u8ba2\u5355\uff08\u5373\u5173\u8054\u5b8c\u6210\u7aef\u53e3\u5931\u8d25\uff09\uff0c\u670d\u52a1\u5668\u4f1a\u91c7\u53d6\u76f8\u5e94\u63aa\u65bd\u3002\u5c31\u50cf\u670d\u52a1\u5458\u4f1a\u6495\u6389\u521a\u8d34\u7684\u8ba2\u5355\uff08\u8c03\u7528m_ContextPool.Free\u51fd\u6570\u9500\u6bc1ContextObject\uff09\uff0c\u793c\u8c8c\u5730\u544a\u77e5\u987e\u5ba2\u201c\u62b1\u6b49\u7cfb\u7edf\u6545\u969c\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\u201d\uff08\u53d1\u9001RST\u5305\u7ec8\u6b62\u8fde\u63a5\uff09\u3002\u5f53\u987e\u5ba2\u79bb\u5f00\u65f6\uff0c\u7cfb\u7edf\u5185\u6838\u4f1a\u81ea\u52a8\u56de\u6536\u76f8\u5173\u8d44\u6e90\uff0c\u5c31\u5982\u540c\u5e97\u94fa\u81ea\u52a8\u6e05\u7406\u987e\u5ba2\u79bb\u5f00\u540e\u7684\u5ea7\u4f4d\u3002<\/li>\n

    \uff08\u56db\uff09\u8bbe\u7f6e\u5065\u5eb7\u68c0\u67e5\uff08TCP\u4fdd\u6d3b\u673a\u5236\uff09<\/h4>\n

    setsockopt(…); \/\/ \u8bbe\u7f6e3\u5206\u949f\u63a2\u6d4b + 10\u79d2\u91cd\u8bd5<\/p>\n

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