{"id":3789,"date":"2019-08-20T19:08:41","date_gmt":"2019-08-20T11:08:41","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=3789"},"modified":"2019-08-20T19:08:41","modified_gmt":"2019-08-20T11:08:41","slug":"%e9%82%a3%e4%ba%9b%e5%b9%b4%e6%88%91%e4%bb%ac%e8%bf%bd%e8%bf%87%e7%9a%84%e7%bd%91%e7%bb%9c%e5%ba%93","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/3789","title":{"rendered":"\u90a3\u4e9b\u5e74\u6211\u4eec\u8ffd\u8fc7\u7684\u7f51\u7edc\u5e93"},"content":{"rendered":"

#\u4e3a\u4ec0\u4e48\u8981\u7528 C++ \u7f16\u5199\u670d\u52a1\u7aef\u7a0b\u5e8f\uff1f \u5982\u679c\u8bf4\u7b54\u6848\u662f\u6027\u80fd\uff0c\u90a3\u4e48\u80af\u5b9a\u6709\u4eba\u4f1a\u6ee1\u4e0d\u5728\u4e4e\u3002\u89c9\u5f97\u6027\u80fd\u4e0d\u591f\u7684\u8bdd\uff0c \u53ea\u8981\u52a0\u673a\u5668\u5c31\u53ef\u4ee5\u4e86\u3002 \u7136\u800c\u66f4\u5c11\u7684\u673a\u5668\uff0c\u610f\u5473\u7740\u66f4\u4f4e\u7684\u80fd\u8017\uff0c\u66f4\u5c11\u7684\u786c\u4ef6\u6295\u5165\uff0c\u66f4\u5c11\u7684\u4eba\u529b\u8d44\u6e90\u6295\u5165\u53bb\u7ef4\u62a4\u673a\u5668\u3002\u603b\u800c\u8a00\u4e4b\uff0c\u66f4\u4f4e\u7684\u6210\u672c\u3002<\/p>\n

\u80af\u5b9a\u4f1a\u6709\u4eba\u8bf4\uff0cC++\u7684\u5f00\u53d1\u901f\u5ea6\u592a\u6162\u4e86\u3002\u7136\u800c\u8fd9\u5e76\u4e0d\u662f\u7edd\u5bf9\u7684\u3002C++\u4e5f\u53ef\u4ee5\u505a\u5230\u975e\u5e38\u5feb\u901f\u7684\u5f00\u53d1\u3002\u6709\u53e5\u4fd7\u8bed * \u201c\u811a\u672c\u4e00\u65f6\u723d\uff0c\u91cd\u6784\u706b\u846c\u573a\u201d * \u8bf4\u7684\u6b63\u662f\u811a\u672c\u8bed\u8a00\u5f00\u53d1\u7684\u9879\u76ee\u8fdb\u5165\u7ef4\u62a4\u9636\u6bb5\u540e\u65e0\u7a77\u7684\u707e\u96be\u3002\u800c C++ \u7ecf\u8fc7\u4e86\u51e0\u5341\u5e74\u7684\u53d1\u5c55, \u62e5\u6709\u5e9e\u5927\u7684\u5de5\u5177\u94fe. \u4e0d\u7ba1\u662f\u52a8\u6001\u5206\u6790\u8fd8\u662f\u9759\u6001\u5206\u6790\u90fd\u6709\u5927\u91cf\u7684\u5de5\u5177, \u80fd\u6781\u5927\u7684\u5e2e\u52a9\u7a0b\u5e8f\u5458\u51cf\u5c11\u9519\u8bef. c++\u5f97\u76ca\u4e8e\u7cbe\u826f\u7684\u8bbe\u8ba1\uff0c\u4e25\u683c\u7684\u68c0\u67e5\uff0c\u8d8a\u662f\u5927\u578b\u7684\u5de5\u7a0b\uff0c\u8d8a\u662f\u80fd\u964d\u4f4e\u5f00\u53d1\u6210\u672c\u3002<\/p>\n

\u4f46\u8fd9\u5e76\u4e0d\u610f\u5473\u7740C++\u5c31\u4e0d\u9002\u5408\u5c0f\u578b\u9879\u76ee\u4e86\u3002\u5c0f\u578b\u7684\u9879\u76ee\uff0c\u4e5f\u53ef\u4ee5\u5feb\u901f\u5f00\u53d1\u3002\u56e0\u4e3a C++11 \u5f00\u59cb\uff0c\u5df2\u7ecf\u00a0\u611f\u89c9\u50cf\u662f\u5168\u65b0\u7684\u8bed\u8a00\u4e86<\/em>\uff0c\u53ef\u4ee5\u5b8c\u5168\u4ee5\u811a\u672c\u7684\u5f62\u5f0f\u53bb\u4f7f\u7528\uff0c\u83b7\u5f97\u63a5\u8fd1\u751a\u81f3\u8d85\u8d8a\u811a\u672c\u8bed\u8a00\u7684\u5f00\u53d1\u901f\u5ea6\uff0c\u540c\u65f6\u5f97\u76ca\u4e8e\u7f16\u8bd1\u4f18\u5316\uff0c\u83b7\u5f97\u4e0d\u4fd7\u7684\u8fd0\u884c\u65f6\u6027\u80fd\u3002 C++\u6b63\u662f\u9c7c\u548c\u718a\u638c\u5f97\u517c\u7684\u8bed\u8a00\u3002<\/p>\n

#\u4e3a\u4ec0\u4e48\u8981\u7528asio\u8fd9\u4e2a\u5e93\uff1f<\/p>\n

\u4e8b\u5b9e\u4e0a\u5982\u679c\u4f7f\u7528C++\u5f00\u53d1\u670d\u52a1\u7aef\u7a0b\u5e8f\uff0c\u4f60\u6709\u591a\u5f97\u6570\u4e0d\u6e05\u7684\u9009\u62e9\u3002\u4ec0\u4e48 ACE \u5566\uff0clibuv \u5566\uff0clibevent \u5566\uff0clibev \u5566\uff0c\u751a\u81f3\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 epoll\/iocp \u8fd9\u6837\u7684\u7cfb\u7edfAPI\u3002 \u4e3a\u4ec0\u4e48\u8981\u7528 asio \u5462\uff1f<\/p>\n

##\u90a3\u4e9b\u5e74\u6211\u4eec\u7528\u8fc7\u7684\u7f51\u7edc\u5e93<\/p>\n

\u5728\u8ba1\u7b97\u673a\u53f2\u524d\u6587\u660e\u65f6\u4ee3, \u66fe\u7ecf\u6709\u4e2a\u4e16\u754c\u96be\u9898, \u53eb\u00a0\u201cc10k problem\u201d<\/em>. \u8fd9\u4e2a\u662f\u7ee7 y2k problem \u540e\u7684\u53c8\u4e00\u4e2a\u91cd\u5927\u653b\u5173\u9879\u76ee. \u5168\u4e16\u754c\u7684\u6587\u827a\u9752\u5e74\u90fd\u60f3\u62ff\u4e0b\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u8363\u8a89, \u6b63\u53ef\u8c13\u516b\u4ed9\u8fc7\u6d77, \u5404\u663e\u795e\u901a.<\/p>\n

\u90a3\u4e00\u5e74, NPTL \u8fd8\u6ca1\u6709\u7814\u7a76\u51fa\u6765. \u8fd8\u4e0d\u80fd\u521b\u5efa\u6210\u5343\u4e0a\u4e07\u4e2a\u7ebf\u7a0b
\n\u90a3\u4e00\u5e74, windows \u8fd8\u5728\u84dd\u5c4f\u4e2d\u6323\u624e, \u65e0\u6687\u987e\u53ca\u7f51\u7edc.<\/p>\n

\u7136\u800c, \u66d9\u5149\u8fd8\u662f\u6709\u7684. \u5f02\u6b65\u7684\u51fa\u73b0\u5e26\u7ed9\u4e86\u4eba\u4ee5\u5e0c\u671b. \u53e4\u8001\u7684UNIX\u65e9\u5c31\u60f3\u5230\u4e86, \u63d0\u4f9b\u4e86 select() \u7cfb\u7edf\u8c03\u7528\u4f9b\u4eba\u9a71\u4f7f. \u7136\u800c\u95ee\u9898\u8fd8\u662f\u6709\u7684, select \u53ea\u80fd\u652f\u6301 1024 \u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26, windows \u4e0a\u7684 select \u66f4\u662f\u52a3\u8d28\u5230\u53ea\u80fd\u4f7f\u752864\u4e2a. \u5c31\u7b97\u901a\u8fc7\u4fee\u6539\u5b9a\u4e49\u5f3a\u8feb\u63a5\u53d7\u4e00\u4e07\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26, \u4e5f\u6ca1\u6709\u89e3\u51b3\u5b9e\u9645\u7684\u95ee\u9898. select \u5b9e\u5728\u662f\u592a\u6162\u4e86.<\/p>\n

\u5728\u8fd9\u79cd\u80cc\u666f\u4e0b, IBM \u8001\u5927\u54e5\u5e26\u9886\u7740MS\u8001\u5f1f\u5148\u641e\u4e86 IOCP . \u7136\u800c\u5f00\u6e90\u7684\u4eba\u6709\u5f00\u6e90\u7684\u505a\u6cd5, \u5728 NIH \u7efc\u5408\u75c7\u7684\u5f71\u54cd\u4e0b, BSD \u7684\u4eba\u6562\u4e3a\u5929\u4e0b\u6240\u4e0d\u9f7f, \u53d1\u660e\u4e86 Kqueue. \u540c\u6837\u5728 NIH \u7efc\u5408\u75c7\u5f71\u54cd\u4e0b, Linux \u7684\u4e00\u7fa4 M* \u7684\u7334\u5b50\u6363\u9f13\u51fa\u4e86 epoll.<\/p>\n

\u5206\u88c2, \u8ba9\u4eba\u5934\u75bc.<\/p>\n

\u7136\u800c, \u4ed6\u4eec\u90fd\u58f0\u79f0\u81ea\u5df1\u7684\u65b0\u63a5\u53e3\u5bf9 select \u6709\u8d28\u7684\u63d0\u5347, \u662f\u7834\u89e3 c10k \u95ee\u9898\u7684\u4e0d\u4e8c\u6cd5\u5b9d. \u4f60\u7528\u4e5f\u5f97\u7528, \u4e0d\u7528\u4e5f\u5f97\u7528. \u4e3a\u4e86\u8ba9\u81ea\u5df1\u7f16\u5199\u7684\u7f51\u7edc\u7a0b\u5e8f\u80fd\u8de8\u5e73\u53f0, \u7a0b\u5e8f\u5458\u5f00\u59cb\u4e86\u5bf93\u5927\u5404\u81ea\u4e3a\u9635\u7684\u6cd5\u5b9d\u7684\u819c\u62dc\u5b66\u4e60.
\n\u9664\u4e86\u9700\u8981\u5e94\u5bf9\u591a\u5957\u4e92\u4e0d\u517c\u5bb9\u7684 API , \u5f02\u6b65\u672c\u8eab\u4e5f\u9700\u8981\u66f4\u9ad8\u7ea7\u7684\u62bd\u8c61, \u628a\u7a0b\u5e8f\u5458\u4ece\u7f16\u5199\u5f02\u6b65\u4ee3\u7801\u7684\u5730\u72f1\u6a21\u5f0f\u91cc\u62ef\u6551\u51fa\u6765. \u4e8e\u662f\u7a0b\u5e8f\u5458\u4eec\u6025\u9700\u4e00\u4e2a\u4e0a\u5929\u5165\u5730\u65e0\u6240\u4e0d\u80fd\u7684\u6cd5\u5b9d\u7684\u6cd5\u5b9d, \u628a\u8fd93\u5bb6\u6cd5\u5b9d\u7ed9\u7edf\u5fa1\u8d77\u6765.<\/p>\n

\u7387\u5148\u7ad9\u51fa\u6765\u60b3\u745f\u7684\u662f ACE.<\/p>\n

\u60b3\u745f\u7684 ACE<\/h3>\n

\u6070\u4e71\u4e16\u521a\u8fc7, \u5929\u4e0b\u5f85\u5b9a, C++ \u59d4\u5458\u4f1a\u7684\u8001\u4eba\u4eec\u5374\u97ec\u5149\u517b\u6666, \u4e0d\u95ee\u4e16\u4e8b. \u6240\u8c13\u4e71\u4e16\u51fa\u82f1\u96c4, \u82f1\u96c4\u51fa\u5c11\u5e74, \u6b27\u6587\u5927\u5b66\u51fa\u4e86\u540d\u79c0\u624d. \u51ed\u501f\u5176\u6d0b\u6d0b\u6d12\u6d12\u7684\u4e00\u7247\u96c4\u6587 \u300aPattern-Oriented Software Architecture\u300b \u4e2d\u4e3e\u53bb\u4e86\u9996\u5e9c\u5b66\u57ce, \u5e76\u4e3aACE\u5960\u5b9a\u4e86\u65e0\u53ef\u64bc\u52a8\u7684\u5730\u4f4d.<\/p>\n

ACE \u7684\u540d\u5b57, \u4e5f\u8bb8\u7075\u611f\u6765\u81ea Adaptive Clubbed Rod, \u8fd9\u4e5f\u662f\u5f53\u5e74\u4e00\u4f4d\u82f1\u96c4\u5c11\u5e74\u7684\u5b9d\u8d1d. \u65e2\u662f\u5b9d\u8d1d, \u5fc5\u9700\u5982\u610f. \u5373\u662f\u540e\u6765\u7684\u846b\u82a6\u5a03\u90fd\u6015\u4e86 \u201c\u5982\u610f\u5b9d\u8d1d\u201d.<\/p>\n

ACE \u5982\u610f\u5728\u4ec0\u4e48\u5730\u65b9\u5462\uff1f\u5982\u610f\u5176\u4e00, \u652f\u6301 IOCP\/kqueu\/epoll\/select\/you_name_it \u5404\u79cd\u63a5\u53e3, \u53f7\u66f0\u6ca1\u6709\u4e0d\u80fd\u8de8\u7684\u5e73\u53f0. \u5982\u610f\u5176\u4e8c, \u652f\u6301\u591a\u79cd\u6a21\u578b\u3002\u8fd9\u4e9b\u6a21\u578b\u90fd\u5728\u300aPattern-Oriented Software Architecture\u300b\u6709\u8fc7\u8be6\u7ec6\u53d9\u8ff0. ACE \u672c\u8eab\u5c31\u662f\u8fd9\u7bc7\u8bba\u6587\u7684\u5b9e\u8df5\uff0c\u56e0\u4e3a\u4ed6\u77e5\u9053, \u7eb8\u4e0a\u5f97\u6765\u7ec8\u89c9\u6d45 \u7edd\u77e5\u6b64\u4e8b\u8981\u8eac\u884c\u3002 \u5982\u610f\u5176\u4e09, \u63a5\u53e3\u548c\u6a21\u5f0f\u6392\u5217\u7ec4\u5408\u4e0b, \u591a\u5c11\u79cd, \u7adf\u53ef\u4e0d\u4fee\u6539\u4ee3\u7801\u800c\u9002\u5e94\u3002<\/p>\n

\u7136\u800c ACE \u6bd5\u7adf\u5ae9\u4e86\u70b9, \u6ca1\u8fc7\u51e0\u5e74\u5c31\u5931\u52bf\u4e86. \u73b0\u5728\u9664\u4e86\u4e00\u4e9b\u8001\u7a0b\u5e8f\u5458\u8fd8\u5728\u7528, \u65b0\u751f\u4ee3\u7684\u7a0b\u5e8f\u5458\u5df2\u7ecf\u4e0d\u518d\u4f7f\u7528 ACE \u4e86. \u4e3a\u4ec0\u4e48\u5462? \u9648\u7855\u5728\u4ed6\u7684\u535a\u5ba2\u91cc\u8bf4,\u00a0ACE \u8fc7\u4e8e\u590d\u6742\uff0c\u751a\u81f3\u6bd4\u5b83\u8bd5\u56fe\u5c01\u88c5\u7684\u5bf9\u8c61\u66f4\u590d\u6742<\/strong>, \u7a0b\u5e8f\u5458\u662f\u6307\u671b\u7528\u4f60\u7684\u5982\u610f\u5b9d\u8d1d\u53bb\u9a7e\u9a6d\u53e6\u5916\u90a3\u4e09\u5bb6\u5b9d\u8d1d\u7684, \u7ed3\u679c\u4f60\u6bd4\u4ed6\u4eec\u8fd8\u96be\u3002ACE \u72af\u4e86\u65e9\u671f C++ \u5e93\u90fd\u4f1a\u72af\u7684\u4e00\u4e2a\u9519\u8bef\uff0c\u8fc7\u5ea6\u8bbe\u8ba1\uff0c \u8fc7\u5ea6java\u5316\u3002\u6240\u8c13 java \u5316\uff0c \u5c31\u662f\u4ee5\u5bf9\u8c61\u4ee3\u66ff\u63a5\u53e3\uff0c \u4ee5\u865a\u51fd\u6570\u4ee3\u66ff\u56de\u8c03\uff0c\u4ee5\u7ee7\u627f\u4ee3\u66ff\u7ec4\u5408\u3002\u4ee5\u865a\u7c7b\u4ee3\u66ff\u6a21\u677f\u3002\u5bf9\u8c61\u95f4\u5173\u7cfb\u9519\u7efc\u590d\u6742\uff0c\u7275\u4e00\u53d1\u800c\u52a8\u5168\u8eab\u3002\u9664\u4e86\u4f5c\u8005\uff0c\u5df2\u7ecf\u65e0\u4eba\u80fd\u53c2\u4e0e ACE \u7684\u5f00\u53d1\u4e86\u3002<\/p>\n

\u4e0e\u6b64\u540c\u65f6\uff0cC\u8bed\u8a00\u7684\u56de\u5f52\u5374\u5728\u80cc\u540e\u6084\u7136\u8fdb\u884c\u3002C\u8bed\u8a00\u7684\u590d\u8f9f\uff0c\u5e26\u6765\u4e86\u51e0\u4e2a\u66f4\u4e3a\u7cdf\u7cd5\u7684\u66ff\u4ee3\u54c1\uff0c libevent \u548c libev\uff0c\u4ee5\u53ca \u4e58\u7740nodejs\u7684\u76db\u884c\u4e1c\u98ce\u800c\u6765\u7684 libuv\u3002<\/p>\n

\u539f\u59cb\u7684 libevent<\/h3>\n

C\u8bed\u8a00\u6709\u7740\u987d\u5f3a\u7684\u751f\u547d\u529b\uff0c\u5f53\u7136\uff0c\u8fd9\u5e76\u4e0d\u662f\u56e0\u4e3aC\u8bed\u8a00\u6709\u591a\u597d\uff0c\u5728\u540e\u7eed\u7684\u7ae0\u8282\u4e86\u6211\u4eec\u8fd8\u4f1a\u6df1\u5165\u7684\u63a2\u8ba8C++\u76f8\u5bf9C\u7684\u6539\u8fdb\u3002C\u8bed\u8a00\u7684\u987d\u5f3a\u548c\u4eba\u5929\u751f\u7684\u61d2\u60f0\u548c\u504f\u89c1\u662f\u6709\u4e00\u5b9a\u5173\u7cfb\u7684\u3002\u8fd9\u79cd\u60f0\u6027\u8868\u73b0\u4e3a\u968f\u9047\u800c\u5b89\uff0c\u8868\u73b0\u4e3a\u56fa\u6267\u5df1\u89c1\u3002 \u975e\u8981\u62fc\u547d\u7684\u5426\u5b9aC++\uff0c\u56fa\u5b88 C , \u5bf9 C \u7684\u7f3a\u70b9\u89c6\u800c\u4e0d\u89c1\uff0c\u8bcb\u6bc1C++\u76f8\u5bf9C\u7684\u6539\u8fdb\u3002\u56fa\u5b88\u7684\u7ed3\u679c\u5c31\u662f\u7b80\u964b\u539f\u59cb\u7684 libevent . \u7136\u800c\u56e0\u4e3a\u4fdd\u5b88\u515a\u5de8\u5927\u7684\u4eba\u6570\u4f18\u52bf\uff0c libevent \u5e94\u5176\u7fa4\u4f17\u57fa\u7840\u826f\u597d\u800c\u83b7\u5f97\u4e86\u7a7a\u524d\u7684\u5e7f\u6cdb\u4f7f\u7528\u3002<\/p>\n

libevent \u5c31\u5982\u540d\u5b57\u6240\u8a00\uff0c\u662f\u4e00\u4e2a\u5f02\u6b65\u4e8b\u4ef6\u6846\u67b6\u3002\u4ece OS \u90a3\u91cc\u83b7\u5f97\u4e8b\u4ef6\uff0c \u7136\u540e\u6d3e\u53d1\u3002\u6d3e\u53d1\u673a\u5236\u5c31\u662f\u201c\u56de\u8c03\u51fd\u6570\u201d\u3002\u5f02\u6b65\u5f02\u6b65\uff0c\u5f52\u6839\u7ed3\u5e95\u5c31\u662f\u5904\u7406\u4ece\u64cd\u4f5c\u7cfb\u7edf\u83b7\u5f97\u7684\u4e8b\u4ef6\u3002iocp\u4e5f\u597d\uff0c epoll\u4e5f\u7f62\uff0c\u90fd\u53ea\u662f\u7528\u6765\u83b7\u53d6\u4e8b\u4ef6\u7684\u63a5\u53e3\u3002libevent \u53bb\u6389\u4e86ACE\u534e\u800c\u4e0d\u5b9e\u7684\u5305\u88c5\uff0c\u4fdd\u7559\u4e86\u5f02\u6b65\u4e8b\u4ef6\uff0c\u6781\u5927\u7684\u7b80\u5316\u4e86\u6a21\u578b\u3002\u4e0d\u5f97\u4e0d\u8bf4\u8f6f\u4ef6\u5de5\u7a0b\u662f\u4e2a\u7cdf\u7cd5\u7684\u53d1\u660e\uff0c\u4ece\u6765\u90fd\u628a\u7b80\u5355\u95ee\u9898\u590d\u6742\u5316\u3002libevent\u628a\u7b80\u5355\u95ee\u9898\u7b80\u5355\u5316\uff0c\u8ba9\u5f02\u6b65\u7f51\u7edc\u7f16\u7a0b\u53cd\u6734\u5f52\u771f\uff0c\u5e94\u8be5\u6765\u8bf4\uff0c\u672c\u662f\u4e00\u4e2a\u597d\u5e93\u3002<\/p>\n

\u7136\u800c libevent \u56e0\u4e3a\u8bbe\u8ba1\u7f3a\u9677\uff0c\u4f8b\u5982\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\uff0c\u5b9a\u65f6\u5668\u65e0\u6cd5\u5904\u7406\u65f6\u95f4\u8df3\u53d8\uff0c\u8bf8\u5982\u6b64\u7c7b\u7684\u8bbe\u8ba1\u7f3a\u9677\u5bfc\u81f4\u4e86 libev \u7684\u51fa\u73b0\u3002 libev \u5c31\u662f\u4e3a\u4e86\u514b\u670dlibevent\u7684\u7f3a\u9677\u800c\u8bde\u751f\u7684\u3002\u7136\u800c\uff0clibev \u5c31\u4e00\u5b9a\u597d\u4e86\u5417\uff1f<\/p>\n

\u7981\u9522\u7684 libev<\/h3>\n

libev \u5e26\u7740\u5bf9 libevent \u7684\u6028\u6c14\u51fa\u4e16\u4e86\u3002 \u5438\u6536\u4e86 libevent \u7684\u6240\u6709\u7f3a\u70b9\uff0c \u867d\u7136\u627f\u8bfa\u8fc7\u6539\u8fdb\u3002\u7136\u800c libev \u5982\u4f55\u6539\u8fdb\u7684\u4e86\u5462\uff1f libev \u5df2\u7ecf\u591f\u539f\u59cb\u4e86\uff0c\u5411\u4e0b\u6539\u8fdb\u8fd8\u4e0d\u5982\u8ba9\u4eba\u76f4\u63a5\u4f7f\u7528\u7cfb\u7edf\u7684 api, \u5411\u4e0a\u6539\u8fdb\uff0c\u4e00\u662f\u4f1a\u5bfc\u81f4\u548clibevent\u7684\u91cd\u53e0\uff0c\u4e8c\u662f\u5f88\u5feb\u5c31\u78b0\u5230\u4e86 C \u8bed\u8a00\u5f3a\u52a0\u7684\u7981\u9522\u3002<\/p>\n

C \u8bed\u8a00\u56e0\u5176\u8bed\u6cd5\u7b80\u964b<\/s>\u7b80\u6d01\u800c\u8457\u79f0\u3002\u7136\u800c\uff0c\u7f3a\u4e4f\u5fc5\u8981\u7684\u62bd\u8c61\u80fd\u529b\uff0c\u5bfc\u81f4 C \u8bed\u8a00\u7f16\u5199\u5f02\u6b65\u7a0b\u5e8f\uff0c\u5c31\u5982\u540c\u5b89\u8fea\u62ff\u7740\u5c0f\u9524\u5b50\u7422\u5f00\u8096\u751f\u514b\u76d1\u72f1\u7684\u5899\u58c1\u4e00\u6837\u3002\u80fd\uff0c\u4f46\u662f\u8981\u8017\u8d39\u5de8\u5927\u7684\u7cbe\u529b\u548c\u65f6\u95f4\u3002 \u7f16\u5199\u5f02\u6b65\u7a0b\u5e8f\uff0c \u6700\u9700\u8981\u76842\u4e2a\u62bd\u8c61\u80fd\u529b\uff0c \u5176\u4e00\u4e3a\u534f\u7a0b\uff0c\u5176\u4e8c\u662f\u51fd\u6570\u5bf9\u8c61\uff0c\u5305\u62ec\u533f\u540d\u51fd\u6570\u5bf9\u8c61\uff0c \u4e5f\u5c31\u662flambda\u3002 C\u7edf\u7edf\u6ca1\u6709\u3002\u51fd\u6570\u5bf9\u8c61\u662f\u5b9e\u73b0\u95ed\u5305\u6bd4\u4e0d\u53ef\u5c11\u7684\uff0c\u5982\u679c\u6ca1\u6709\u51fd\u6570\u5bf9\u8c61\uff0c \u5c31\u53ea\u80fd\u901a\u8fc7\u643a\u5e26\u00a0void*<\/code>\u00a0\u6307\u9488\u7684\u5f62\u5f0f\u8fc2\u56de\u5b8c\u6574\uff0c\u7e41\u7410\u4e0d\u8bf4\uff0c\u8fd8\u7279\u522b\u5bb9\u6613\u51fa\u9519\u3002\u7a0b\u5e8f\u91cc\u4e5f\u5230\u5904\u5145\u6ee1\u4e86\u7c7b\u578b\u5f3a\u8f6c\u3002\u5230\u5904\u662f\u4e34\u65f6\u5b9a\u4e49\u7684\u7c7b\u578b\uff0c\u5c31\u4e3a\u4e86\u4f20\u7ed9\u00a0void*<\/code>\u00a0\u4f7f\u7528\u3002<\/p>\n

\u5c3d\u7ba1C \u6709\u90a3\u4e48\u591a\u7f3a\u70b9\uff0c\u7136\u800c libev \u8fd8\u672a\u6765\u5f97\u53ca\u88abC\u7684\u7f3a\u70b9\u62d6\u7d2f\uff0c\u56e0\u4e3a\u4ed6\u4e0d\u652f\u6301 IOCP. \u4e8e\u662f libuv \u5c31\u51fa\u6765\u7ed9 libev \u64e6\u5c41\u80a1\u4e86\u3002 \u652f\u6301\u4e86 iocp \u540e\u7684 libuv \u5c31\u771f\u7684\u53ea\u6709 C \u672c\u8eab\u7684\u7f3a\u70b9\u4e86\u5417\uff1f<\/p>\n

\u6df7\u4e71\u7684 libuv<\/h3>\n

libuv \u53ef\u4ee5\u8bf4\u662f C \u8bed\u8a00\u7684\u5f02\u6b65\u5e93\u6240\u80fd\u8fbe\u5230\u7684\u6700\u9ad8\u9ad8\u5ea6\u4e86\u3002\u5b8c\u5b8c\u5168\u5168\u7684\u89e6\u78b0\u5230\u4e86C\u8bed\u8a00\u7684\u81ea\u8eab\u74f6\u9888\uff0c\u597d\u5728 libuv \u53ea\u662f nodejs \u7684\u5e95\u5c42\u5e93\uff0c\u4e0a\u5c42\u8f6f\u4ef6\u8f6c\u79fb\u5230 javascript \u8bed\u8a00\u800c\u9003\u907f\u4e86 C \u7684\u7981\u9522\u3002<\/p>\n

\u771f\u7684\u662f\u8fd9\u6837\u7684\u5417\uff1f libuv \u81ea\u8eab\u8fd8\u6709\u4ec0\u4e48\u7f3a\u70b9\u5462\uff1f<\/p>\n

\u5f00\u6e90\u793e\u533aavplayer\u7684\u5927\u62ffjackarain\u66fe\u7ecf\u8bf4\u8fc7\uff0c\u4e00\u4e2a\u7f51\u7edc\u5e93\u597d\u4e0d\u597d\uff0c\u5c31\u770b\u4ed6\u6709\u6ca1\u6709\u6b63\u786e\u7684\u5904\u7406 TCP \u5173\u95ed\uff0c read write \u5b9e\u73b0\u7684ui\u4e0d\u5bf9\u3002 libuv \u5f88\u9057\u61be\u7684\u662f\uff0c\u4e0d\u5408\u683c\u3002libuv \u7684 uv_write \u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u5141\u8bb8\u7a7a\u56de\u8c03\u3002\u4e5f\u5c31\u662f\u5ffd\u7565write\u9519\u8bef\u3002 \u7f51\u7edc\u51fa\u9519\u7684\u60c5\u51b5\u4e0b\uff0c libuv \u7684\u7528\u6237\u53ea\u80fd\u7a00\u91cc\u7cca\u6d82\u7684\u77e5\u9053\u51fa\u9519\u4e86\uff0c \u81f3\u4e8e\u9519\u5728\u54ea\uff1f\u6570\u636e\u5230\u5e95\u6709\u6ca1\u6709\u53d1\u51fa\u53bb\u4e86? \u4e00\u6982\u4e0d\u77e5\u9053\u3002 \u628a\u6570\u636e\u4ea4\u7ed9 uv_write \u540e\uff0c\u5c31\u662f\u4e00\u7b14\u7cca\u6d82\u8d26\u4e86\uff0c\u5927\u6982 TCP \u4e0d\u53ef\u9760\u7684\u8bf4\u6cd5\u5c31\u662f\u4ece\u8fd9\u91cc\u4f20\u51fa\u6765\u7684\u5427\u3002<\/p>\n

\n

ASIO \u817e\u7a7a\u51fa\u4e16<\/h2>\n

\u5728\u5730\u7403\u6700\u5927\u7684\u5c9b\u4e0a\uff0c\u53e6\u4e00\u4f4d\u5c11\u5e74\u5f00\u59cb\u62dc\u8bfb ACE \u7684\u5927\u4f5c\u3002\u90a3\u65f6\u5019\uff0c\u6ca1\u6709 libuv \u6ca1\u6709 libev \u66f4\u6ca1\u6709 libevent . \u6709\u7684\u53ea\u662f ACE. \u7136\u800c\u8fd9\u4e2a\u5357\u65b9\u5c0f\u56fd\u7684\u5c11\u5e74\u6ca1\u6709\u8ddf\u98ce\u9677\u5165 ACE \u5d07\u62dc\uff0c\u4ed6\u4ee5\u654f\u9510\u7684\u76ee\u5149\u5bdf\u89c9\u5230\u4e86 ACE \u7684\u5f0a\u75c5\u3002 ACE \u54ea\u91cc\u505a\u7684\u4e0d\u597d\uff1f\u53c8\u54ea\u91cc\u662f\u503c\u5f97\u501f\u9274\u7684\uff1f<\/p>\n

\u5c11\u5e74\u5728\u7ed9 c++ \u59d4\u5458\u4f1a\u5199\u7684\u4e00\u7bc7\u4e0a\u4e66\u4e2d\u8bf4\uff0cProactor \u6a21\u578b\u4e43\u6700\u4f18\u6a21\u578b\u3002\u800c Proactor \u6a21\u578b\uff0c\u4e43 ACE \u63d0\u51fa\u7684 6 \u4e2a\u6a21\u578b\u4e4b\u4e00\u3002\u6839\u636e IT \u754c\u8d62\u8005\u901a\u5403\u5f8b\uff0c\u4e00\u4e2a\u4f18\u79c0\u7684\u7f51\u7edc\u5e93\uff0c\u53ea\u9700\u8981\u652f\u6301 Proactor \u6a21\u578b\u5373\u53ef\u3002 \u652f\u6301\u5176\u4ed6\u6b21\u4f18\u6a21\u578b\u90fd\u662f\u5f92\u52b3\u7684\u3002ACE \u8bd5\u56fe\u5168\u76d8\u901a\u5403\uff0c\u72af\u4e86\u5927\u5fcc\u3002<\/p>\n

\u5c11\u5e74\u5728\u4e00\u6b21\u5f00\u53d1\u8005\u5927\u4f1a\u7684\u6f14\u8bb2\u4e0a\uff0c\u518d\u6b21\u900f\u9732\uff0c\u7f51\u7edc\u5e93\u4e0d\u5b9c\u505a\u6210\u6846\u67b6\uff0c\u800c\u662f\u8981\u50cf\u7cfb\u7edf\u7684API\u90a3\u6837\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u4e50\u9ad8\u79ef\u6728\u3002ACE \u505a\u6210\u4e86\u4e00\u4e2a\u6846\u67b6\uff0c\u540c\u6837\u4e0d\u59a5\u3002<\/p>\n

\u4f60\u8bf4\u4e86\u90a3\u4e48\u591a ACE \u4e0d\u597d\uff0c\u6709\u672c\u4e8b\u4f60\u5f04\u4e2a\u597d\u7684\u554a\uff1f \u6279\u8bc4\u8005\u5411\u6765\u90fd\u662f\u8fd9\u4e48\u7406\u76f4\u6c14\u58ee\u3002 \u6b63\u5982 ACE \u7684\u4f5c\u8005\u5b9e\u8df5\u4e86 \u201c\u7eb8\u4e0a\u5f97\u6765\u7ec8\u89c9\u6d45 \u7edd\u77e5\u6b64\u4e8b\u8981\u8eac\u884c\u201d \u4e00\u6837\uff0c\u8fd9\u4f4d\u52c7\u6562\u7684\u5c11\u5e74\u4e5f\u62ff\u51fa\u4e86 ASIO, \u201c\u5b9e\u8df5\u51fa\u771f\u77e5\u201d\uff0c\u4ed6\u5982\u662f\u8bf4\u3002<\/p>\n

\u90a3\u8fd8\u662f SARS \u75c5\u6bd2\u8086\u8650\u7684\u5e74\u4ee3\uff0c\u51e0\u4e4e\u6ca1\u6709\u4eba\u6ce8\u610f\u5230\uff0c\u4eca\u540e\u98a0\u8986C++\u7684\u7f51\u7edc\u4e16\u754c\u7684 ASIO \u6084\u7136\u51fa\u4e16\u4e86\u3002\u800c\u4ed6\u7684\u7236\u4eb2\uff0c\u8fd8\u53ea\u662f\u6089\u5c3c\u7684\u5b66\u5b50\u3002ASIO \u5e76\u6ca1\u6709\u663e\u8d6b\u7684\u5bb6\u5ead\u80cc\u666f\uff0c\u7136\u800c\u82f1\u96c4\u4e0d\u95ee\u51fa\u5904\uff0c\u5b83\u6ce8\u5b9a\u5c06\u6709\u4e0d\u5e73\u51e1\u7684\u4e00\u751f\u3002<\/p>\n

\u4fd7\u8bed\u6709\u4e91\uff0c\u4e09\u5c81\u770b\u8001\u3002\u5728 asio \u624d\u4e09\u5c81\u7684\u65f6\u5019\uff0c\u5b83\u7236\u4eb2\u5c31\u5c06 asio \u5f15\u8350\u7ed9\u4e86 c++ \u59d4\u5458\u4f1a\u7684\u8001\u4eba\u4eec\u3002\u4e0a\u4e00\u6b21\u4ed6\u4eec\u8fd9\u4e48\u505a\u7684\u65f6\u5019\uff0c\u4ed6\u4eec\u63a5\u7eb3\u4e86 STL\u3002 ASIO \u6700\u7ec8\u88ab\u5185\u5b9a\uff0c\u7136\u540e<\/s>\u653e\u5165 Boost \u953b\u70bc, \u7ecf\u8fc7 Boost \u5341\u4f59\u7684\u953b\u70bc\uff0cASIO \u7ec8\u4e8e\u5728 2017 \u5e74\u8fdb\u5165\u4e86 c++ \u6807\u51c6\u3002<\/p>\n

Proactor ? Why Proactor<\/h3>\n

\u5728\u7ed9 c++ \u8001\u4eba\u4f1a\u7684\u5f15\u8350\u4fe1\u91cc\uff0casio \u7238\u7238\u4ed4\u7ec6\u9610\u8ff0\u4e86asio\u7684\u8bbe\u8ba1\u6289\u62e9\u56de\u7b54\u4e86\u56f4\u7ed5 asio \u7684\u8bbe\u8ba1\u63d0\u51fa\u7684\u5f88\u591a\u95ee\u9898\u3002 \u4e3a\u4ec0\u4e48 Proactor \u4f1a\u662f\u6700\u4f73\u6a21\u578b\uff1f<\/p>\n

    \n
  • \u8de8\u5e73\u53f0 \u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u90fd\u6709\u5f02\u6b65API\uff0c\u5373\u4fbf\u662f\u6ca1\u6709\u5f02\u6b65API\u7684Linux, \u901a\u8fc7 epoll \u4e5f\u80fd\u6a21\u62df Proactor \u6a21\u5f0f\u3002<\/li>\n
  • \u652f\u6301\u56de\u8c03\u51fd\u6570\u7ec4\u5408 \u5c06\u4e00\u7cfb\u5217\u5f02\u6b65\u64cd\u4f5c\u8fdb\u884c\u7ec4\u5408\uff0c\u5c01\u88c5\u6210\u5bf9\u5916\u7684\u4e00\u4e2a\u5f02\u6b65\u8c03\u7528\u3002\u8fd9\u4e2a\u53ea\u6709Proactor\u80fd\u505a\u5230\uff0cReactor \u505a\u4e0d\u5230\u3002\u610f\u5473\u7740\u5982\u679casio\u4f7f\u7528Reactor\u6a21\u5f0f\uff0c\u5c31\u5bf9\u4e0d\u8d77\u4ed6\u201c\u5e93\u201d \u4e4b\u540d\u3002<\/li>\n
  • \u76f8\u6bd4 Reactor \u53ef\u4ee5\u5b9e\u73b0 Zero-copy<\/li>\n
  • \u548c\u7ebf\u7a0b\u89e3\u8026 \u957f\u65f6\u95f4\u6267\u884c\u7684\u8fc7\u7a0b\u603b\u662f\u6709\u7cfb\u7edf\u5f02\u6b65\u5b8c\u6210\uff0c\u5e94\u7528\u7a0b\u5e8f\u65e0\u9700\u4e3a\u6b64\u5f00\u542f\u7ebf\u7a0b<\/li>\n<\/ul>\n

    Proactor \u4e5f\u5e76\u975e\u5168\u65e0\u7f3a\u70b9\uff0c\u7f3a\u70b9\u5c31\u662f\u5185\u5b58\u5360\u7528\u6bd4 Reactor \u5927\u3002Proactor \u9700\u8981\u5148\u5206\u914d\u5185\u5b58\u800c\u540e\u5904\u7406IO, \u800c Reactor \u662f\u5148\u7b49\u5f85 IO \u800c\u540e\u5206\u914d\u5185\u5b58\u3002\u76f8\u5bf9\u7684Proactor\u5374\u83b7\u5f97\u4e86Zero-copy\u597d\u5904\u3002\u56e0\u4e3a\u5185\u5b58\u5df2\u7ecf\u5206\u914d\u597d\u4e86\uff0c\u56e0\u6b64\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u5c06\u63a5\u53d7\u5230\u7684\u7f51\u7edc\u6570\u636e\u76f4\u63a5\u4ece\u7f51\u7edc\u63a5\u53e3\u62f7\u8d1d\u5230\u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\uff0c\u800c\u65e0\u9700\u7ecf\u8fc7\u5185\u6838\u4e2d\u8f6c\u3002 Proactor \u6a21\u5f0f\u9700\u8981\u4e00\u4e2a loop ,\u8fd9\u4e2a loop asio \u5c06\u5176\u5c01\u88c5\u4e3a io_service.\u4ed6\u4e0d\u4ec5\u662f asio\u7684\u6838\u5fc3\uff0c\u66f4\u662f\u4e00\u5207\u57fa\u4e8easio\u8bbe\u8ba1\u7684\u7a0b\u5e8f\u7684\u6838\u5fc3\u3002<\/p>\n

    \u5b87\u5b99\u7ea7\u5f02\u6b65\u6838\u5fc3<\/h3>\n

    io_service \u8131\u80ce\u4e8e IO \u4f46\u4e0d\u4ec5\u7528\u4e8e IO. Christopher Kohlhoff \u5728\u7ed9\u59d4\u5458\u4f1a\u7684\u53e6\u4e00\u4efd\u7f16\u53f7 N3747 \u7684\u4fe1\u4e0a\u4e0a\u8bf4\u5b83\u662f\u00a0\u5b87\u5b99\u7ea7\u5f02\u6b65\u6a21\u578b<\/s>\u00a0Universal Asynchronous Model\u3002\u5728\u5b87\u5b99\u7ea7\u5f02\u6b65\u6a21\u578b\u91cc\uff0c\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\u7531\u4e09\u90e8\u5206\u6784\u6210<\/p>\n

      \n
    1. \u53d1\u8d77 \u6309\u7167 asio \u7684\u7f16\u7801\u89c4\u8303\uff0c\u6240\u6709\u7684\u53d1\u8d77\u64cd\u4f5c\u90fd\u4f7f\u7528 async_ \u524d\u7f00\uff0c\u4f7f\u7528 async_\u52a8\u8bcd \u7684\u5f62\u5f0f\u4f5c\u4e3a\u51fd\u6570\u540d\u3002<\/li>\n
    2. \u6267\u884c \u5f02\u6b65\u8fc7\u7a0b\u5728\u53d1\u8d77\u7684\u65f6\u5019\u88abexecutor\u6267\u884c\uff08\u7cfb\u7edf\u53ef\u4ee5\u662f\u652f\u6301 AIO \u7684\u5185\u6838\uff0c\u4e0d\u652f\u6301 AIO \u7684\u7cfb\u7edf\u5219\u662f aiso \u7528\u6237\u5c42\u6a21\u62df\uff09<\/li>\n
    3. \u5b8c\u6210\u5e76\u56de\u8c03 \u5728\u53d1\u8d77 async_* \u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u603b\u662f\u643a\u5e26\u4e00\u4e2a\u56de\u8c03\u7684\u95ed\u5305\u3002asio\u4f7f\u7528\u95ed\u5305\u4f5c\u4e3a\u5f02\u6b65\u4e8b\u4ef6\u5b8c\u6210\u7684\u5904\u7406\u56de\u8c03\uff0c\u6ca1\u800c\u4e0d\u662fC\u5f0f\u7684\u56de\u8c03\u51fd\u6570\u3002asio\u7684\u5b87\u5b99\u5f02\u6b65\u6a21\u578b\u91cc\uff0c\u56de\u8c03\u603b\u662f\u5728\u6267\u884c io_service::run \u7684\u7ebf\u7a0b\u91cc\u6267\u884c\u3002asio\u7edd\u4e0d\u4f1a\u5728\u5185\u90e8\u7ebf\u7a0b\u91cc\u8c03\u7528\u56de\u8c03\u3002<\/li>\n<\/ol>\n

      \u5728\u56de\u8c03\u91cc\u53d1\u8d77\u65b0\u7684\u5f02\u6b65\u64cd\u4f5c\uff0c\u4e00\u8f6e\u5957\u4e00\u8f6e\u3002\u6574\u4e2a\u7a0b\u5e8f\u5c31\u56f4\u7ed5\u7740 io_service::run \u8fd0\u8f6c\u8d77\u6765\u4e86\u3002 io_service \u4e0d\u4ec5\u4ec5\u80fd\u7528\u4e8e\u5f02\u6b65 IO ,\u8fd8\u53ef\u4ee5\u7528\u6765\u6295\u9012\u4efb\u610f\u95ed\u5305\u3002\u5b9e\u73b0\u4f5c\u4e3a\u7ebf\u7a0b\u6c60\u7684\u529f\u80fd\u3002\u8fd9\u4e00\u901a\u7528\u578b\u5f02\u6b65\u6a21\u578b\u5f7b\u5e95\u51fb\u8d25\u5fae\u8f6f PPL \u63d0\u6848\uff0c\u81f4\u4f7f\u5fae\u8f6f\u8f6c\u800c\u7814\u7a76\u534f\u7a0b\u3002\u7136\u800c\u5fae\u8f6f\u5728\u534f\u7a0b\u4e0a\u540c\u6837\u9762\u4e34 asio \u7684\u7ede\u6740\u3002<\/p>\n

      \u95ed\u5305\u548c\u534f\u7a0b<\/h3>\n

      \u5b87\u5b99\u7ea7 asio \u4f7f\u7528\u95ed\u5305\u4f5c\u4e3a\u56de\u8c03\uff0c\u800c C \u5e93\u53ea\u80fd\u4f7f\u7528\u51fd\u6570+void*, ACE \u867d\u7136\u4f7f\u7528\u7684 C++\u8bed\u8a00\uff0c\u5374\u4e0d\u77e5\u9053\u95ed\u5305\u4e3a\u4f55\u7269\uff0c\u4f7f\u7528\u7684\u662f \u865a\u51fd\u6570\u4f5c\u4e3a\u56de\u8c03\u3002\u9700\u8981\u5927\u91cf\u7684\u4ece ACE \u7684\u5bf9\u8c61\u7ee7\u627f\u3002\u4ee5\u95ed\u5305\u4e3a\u56de\u8c03\uff0casio\u66f4\u662f\u652f\u6301\u4e86\u4e00\u79cd\u53eb\u201c\u65e0\u6808\u534f\u7a0b\u201d\u7684\u5f3a\u608d\u6b66\u5668\u3002 asio\u7684\u65e0\u6808\u534f\u7a0b\uff0c\u4ec5\u4ec5\u901a\u8fc7\u5e93\u7684\u5f62\u5f0f\uff0c\u4e0d\u8bba\u662f\u5728\u6027\u80fd\u4e0a\uff0c\u8fd8\u662f\u6613\u7528\u6027\u4e0a\uff0c\u8fd8\u662f\u7b80\u6d01\u6027\u4e0a\uff0c\u751a\u81f3\u662fB\u683c\u4e0a\uff0c\u90fd\u8d85\u8fc7\u4e86\u5fae\u8f6f\u6613\u4e8e\u4fee\u6539\u8bed\u8a00\u800c\u5f97\u7684 await\u63d0\u6848\u3002<\/p>\n

      \u5fae\u8f6f\uff0c\u4e43\u81f3 ACE \uff0c\u5e76\u4e0d\u662f\u4e0d\u77e5\u9053\u95ed\u5305\uff0c\u800c\u662f\u5728c++\u91cc\u5b9e\u73b0\u95ed\u5305\u7684\u5b87\u5b99\u7ea7executor \u2014\u2014 \u4e5f\u5c31\u662f io_service\uff0c\u9700\u8981\u5bf9\u6a21\u677f\u6280\u672f\u7684\u7cbe\u901a\u3002 asio \u201c\u628a\u56f0\u96be\u7559\u7ed9\u81ea\u5df1\uff0c\u628a\u65b9\u4fbf\u5e26\u7ed9\u5927\u5bb6\u201d\uff0c\u4ee5\u5730\u7403\u4eba\u65e0\u6cd5\u7406\u89e3\u7684\u65b9\u5f0f\u786c\u662f\u5728 c++98 \u4e0a\u5b9e\u73b0\u4e86\u5b87\u5b99\u7ea7\u5f02\u6b65\u6838\u5fc3\u3002 \u5f53\u7136\uff0c\u5982\u679c c++11 \u65e9\u70b9\u51fa\u73b0\uff0c\u5982\u679c c++17 \u65e9\u70b9\u51fa\u73b0\uff0c\u5b9e\u73b0 asio \u7684\u5b87\u5b99\u6a21\u578b\u4f1a\u66f4\u52a0\u7684\u7b80\u5355 \u2014\u2014 \u5176\u5b9e\u8fd9\u4e5f\u662f c++ \u7684\u7406\u5ff5\uff0c\u589e\u52a0\u8bed\u8a00\u7279\u6027\uff0c\u53ea\u662f\u4e3a\u4e86\u8ba9\u8bed\u8a00\u7528\u8d77\u6765\u66f4\u7b80\u5355\u3002<\/p>\n

      buffers<\/h3>\n

      \u6709\u4e86\u95ed\u5305\u7684\u652f\u6301\uff0c\u5185\u5b58\u7ba1\u7406\u4e5f\u53d8\u5f97\u8f7b\u8f7b\u677e\u677e\u8d77\u6765\u3002 ASIO \u672c\u8eab\u5e76\u4e0d\u7ba1\u7406\u5185\u5b58\uff0c\u6240\u6709\u7684IO\u64cd\u4f5c\uff0c\u53ea\u63d0\u4ea4\u5bf9\u7528\u6237\u7ba1\u7406\u7684\u5185\u5b58\u7684\u5f15\u7528\uff0c\u79f0 Buffers\u3002asio::buffers \u5f15\u7528\u4e86\u7528\u6237\u63d0\u4ea4\u7684\u5185\u5b58\uff0c\u4fdd\u6301\u6574\u4e2a IO \u671f\u95f4\uff0c\u8fd9\u5757\u5185\u5b58\u7684\u6709\u6548\u6027\u662f\u7528\u6237\u7684\u8d23\u4efb\u3002\u7136\u800c\u8fd9\u5e76\u4e0d\u96be\uff01 \u56e0\u4e3a\u56de\u8c03\u662f\u4e00\u4e2a\u95ed\u5305\u3002\u901a\u8fc7\u95ed\u5305\u6301\u6709\u5185\u5b58\uff0c\u53ea\u8981 asio \u8fd8\u672a\u56de\u8c03\uff0c\u95ed\u5305\u5c31\u5728\uff0c\u95ed\u5305\u5728\uff0c\u5185\u5b58\u5728\u3002asio \u5728\u8c03\u7528\u5b8c\u56de\u8c03\u540e\u624d\u5220\u9664\u76f8\u5e94\u7684\u95ed\u5305\u3002\u56e0\u6b64\u8d44\u6e90\u7ba1\u7406\u7684\u8d23\u4efb\u53ef\u4ee5\u4e22\u7ed9\u95ed\u5305\uff0c\u800c\u95ed\u5305\u53ef\u4ee5\u901a\u8fc7\u667a\u80fd\u6307\u9488\u7cbe\u786e\u7684\u63a7\u5236\u5185\u5b58\u3002 \u4e0d\u662f GC , \u80dc\u4e8e GC \u5343\u767e\u500d\uff01\u76ca\u4e8ec++\u7684 RAII\u673a\u5236\uff0c\u518d\u65e0\u5185\u5b58\u6cc4\u6f0f\u4e4b\u5fe7\uff01<\/p>\n

      \u8fdb\u5165 ASIO \u7684\u4e16\u754c<\/h2>\n

      \u5bf9 C++ \u7f51\u7edc\u5e93\u7684\u5386\u53f2\u4e5f\u4ecb\u7ecd\u5230\u5dee\u4e0d\u591a\u4e86\uff0c\u63a5\u4e0b\u6765\u7684\u7ae0\u8282\u91cc\uff0c\u5e26\u4f60\u6df1\u5165\u7406\u89e3asio , \u8ba9\u4f60\u540c\u65f6\u83b7\u5f97\u5f00\u53d1\u6548\u7387\u548c\u6267\u884c\u6548\u7387\u3002 \u4e00\u4e9b\u5728\u672c\u7ae0\u91cc\uff0c\u53ef\u80fd\u5bf9\u8bb8\u591a\u4eba\u6765\u8bf4\u90fd\u662f\u521d\u6b21\u89c1\u5230\u7684\u6280\u672f\uff0c\u5c06\u5728\u672c\u4e66\u5269\u4f59\u7ae0\u8282\u91cc\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

      \u7ffb\u5f00\u4e0b\u4e00\u9875\uff0c\u8fdb\u5165 ASIO \u7684\u4e16\u754c\uff0c\u9886\u7565 C++ \u7684\u535a\u5927\u7cbe\u6df1\uff0c\u4eab\u53d7\u7f51\u7edc\u9068\u6e38\u7684\u5feb\u611f\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

      #\u4e3a\u4ec0\u4e48\u8981\u7528 C++ \u7f16\u5199\u670d\u52a1\u7aef\u7a0b\u5e8f\uff1f <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-3789","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/3789","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=3789"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/3789\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=3789"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=3789"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=3789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}