{"id":19414,"date":"2025-04-19T01:42:56","date_gmt":"2025-04-18T17:42:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/19414.html"},"modified":"2025-04-19T01:42:56","modified_gmt":"2025-04-18T17:42:56","slug":"c%e4%bb%8e0%e5%ae%9e%e7%8e%b0%e7%99%be%e4%b8%87%e5%b9%b6%e5%8f%91reactor%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%8c%e7%bb%93","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/19414.html","title":{"rendered":"C++\u4ece0\u5b9e\u73b0\u767e\u4e07\u5e76\u53d1Reactor\u670d\u52a1\u5668(\u5b8c\u7ed3)"},"content":{"rendered":"<h3>\u7b2c\u4e00\u90e8\u5206&#xff1a;\u7406\u89e3Reactor\u6a21\u5f0f<\/h3>\n<h3>\u4ec0\u4e48\u662fReactor\u6a21\u5f0f&#xff1f;<\/h3>\n<p>Reactor\u6a21\u5f0f\u662f\u4e00\u79cd\u4e8b\u4ef6\u9a71\u52a8\u7684\u67b6\u6784\u8bbe\u8ba1&#xff0c;\u4e3b\u8981\u7528\u4e8e\u5904\u7406\u591a\u4e2a\u8f93\u5165\/\u8f93\u51fa\u64cd\u4f5c\u800c\u4e0d\u9700\u8981\u4e3a\u6bcf\u4e2a\u64cd\u4f5c\u521b\u5efa\u72ec\u7acb\u7684\u7ebf\u7a0b\u6216\u8fdb\u7a0b\u3002\u5b83\u901a\u8fc7\u76d1\u542c\u4e00\u7ec4\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff08;\u5982\u5957\u63a5\u5b57&#xff09;\u4e0a\u7684\u4e8b\u4ef6&#xff08;\u4f8b\u5982\u8bfb\u5c31\u7eea\u3001\u5199\u5c31\u7eea&#xff09;&#xff0c;\u5e76\u5728\u8fd9\u4e9b\u4e8b\u4ef6\u53d1\u751f\u65f6\u8c03\u7528\u76f8\u5e94\u7684\u56de\u8c03\u51fd\u6570\u6765\u54cd\u5e94\u3002<\/p>\n<h3>\u5173\u952e\u7ec4\u4ef6<\/h3>\n<ul>\n<li>Event Demultiplexer&#xff1a;\u8d1f\u8d23\u76d1\u89c6\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u5e76\u8fd4\u56de\u54ea\u4e9b\u5df2\u7ecf\u51c6\u5907\u597d\u8fdb\u884cI\/O\u64cd\u4f5c\u3002<\/li>\n<li>Handler&#xff1a;\u5177\u4f53\u6267\u884cI\/O\u64cd\u4f5c\u7684\u5bf9\u8c61&#xff0c;\u901a\u5e38\u4ee5\u56de\u8c03\u7684\u5f62\u5f0f\u5b58\u5728\u3002<\/li>\n<li>Reactor Loop&#xff1a;\u4e3b\u5faa\u73af&#xff0c;\u4e0d\u65ad\u8f6e\u8be2\u4e8b\u4ef6\u591a\u8def\u590d\u7528\u5668&#xff0c;\u5206\u53d1\u4e8b\u4ef6\u7ed9\u5bf9\u5e94\u7684\u5904\u7406\u5668\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u7b2c\u4e8c\u90e8\u5206&#xff1a;\u6280\u672f\u9009\u578b\u4e0e\u51c6\u5907<\/h3>\n<h3>\u4f7f\u7528\u7684\u5e93\u548c\u6280\u672f<\/h3>\n<ul>\n<li>Boost.Asio&#xff1a;\u63d0\u4f9b\u4e86\u8de8\u5e73\u53f0\u7684\u5f02\u6b65I\/O\u529f\u80fd&#xff0c;\u7b80\u5316\u4e86\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u590d\u6742\u6027\u3002<\/li>\n<li>Epoll (Linux)\u00a0\u00a0\u6216\u00a0Kqueue (BSD)\u00a0&#xff1a;\u9ad8\u6548\u5730\u5b9e\u73b0\u4e86\u591a\u8def\u590d\u7528\u673a\u5236&#xff0c;\u5728Linux\u73af\u5883\u4e0b\u63a8\u8350\u4f7f\u7528epoll&#xff0c;\u56e0\u4e3a\u5176\u6027\u80fd\u4f18\u4e8e\u4f20\u7edf\u7684select\/poll\u3002<\/li>\n<li>Thread Pool&#xff1a;\u4e3a\u4e86\u5145\u5206\u5229\u7528\u591a\u6838CPU\u8d44\u6e90&#xff0c;\u53ef\u4ee5\u5f15\u5165\u7ebf\u7a0b\u6c60\u6765\u5f02\u6b65\u5904\u7406\u4efb\u52a1\u3002<\/li>\n<\/ul>\n<h3>\u73af\u5883\u642d\u5efa<\/h3>\n<ul>\n<li>\u5b89\u88c5\u5fc5\u8981\u7684\u5f00\u53d1\u5de5\u5177\u94fe&#xff0c;\u5305\u62ec\u7f16\u8bd1\u5668&#xff08;\u5982GCC&#xff09;\u3001CMake\u7b49\u3002<\/li>\n<li>\u4e0b\u8f7d\u5e76\u914d\u7f6eBoost\u5e93&#xff0c;\u786e\u4fddAsio\u6a21\u5757\u53ef\u7528\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u7b2c\u4e09\u90e8\u5206&#xff1a;\u6838\u5fc3\u4ee3\u7801\u5b9e\u73b0<\/h3>\n<h3>1. \u521d\u59cb\u5316\u670d\u52a1\u5668<\/h3>\n<p>\u4ee3\u7801\u89e3\u8bfb<\/p>\n<p>\u590d\u5236\u4ee3\u7801<\/p>\n<p>cpp <\/p>\n<p>\u6df1\u8272\u7248\u672c<\/p>\n<p>c<\/p>\n<p>\u4ee3\u7801\u89e3\u8bfb<\/p>\n<p>\u590d\u5236\u4ee3\u7801<\/p>\n<p>#include &lt;boost\/asio.hpp&gt; #include &lt;iostream&gt; using boost::asio::ip::tcp; int main() { try { boost::asio::io_context io_context; \/\/ \u521b\u5efaacceptor\u5bf9\u8c61&#xff0c;\u7ed1\u5b9a\u5230\u6307\u5b9a\u7aef\u53e3 tcp::acceptor acceptor(io_context, tcp::endpoint(tcp::v4(), 12345)); std::cout &lt;&lt; &#034;Server started on port 12345&#034; &lt;&lt; std::endl; \/\/ \u542f\u52a8\u76d1\u542c\u5faa\u73af while (true) { \/\/ \u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5 tcp::socket socket(io_context); acceptor.accept(socket); \/\/ \u5904\u7406\u65b0\u8fde\u63a5&#8230; } } catch (std::exception&amp; e) { std::cerr &lt;&lt; &#034;Exception: &#034; &lt;&lt; e.what() &lt;&lt; &#034;\\\\n&#034;; } return 0; } <\/p>\n<h3>2. \u5b9e\u73b0Reactor\u6a21\u5f0f<\/h3>\n<ul>\n<li>\u6ce8\u518c\u4e8b\u4ef6&#xff1a;\u6bcf\u5f53\u6709\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u5230\u6765\u65f6&#xff0c;\u5c06\u5176\u6ce8\u518c\u5230\u4e8b\u4ef6\u591a\u8def\u590d\u7528\u5668\u4e2d\u3002<\/li>\n<li>\u4e8b\u4ef6\u5904\u7406&#xff1a;\u5b9a\u4e49\u4e00\u7cfb\u5217\u7684\u4e8b\u4ef6\u5904\u7406\u5668&#xff0c;\u5982ReadHandler, WriteHandler\u7b49&#xff0c;\u5f53\u7279\u5b9a\u4e8b\u4ef6\u89e6\u53d1\u65f6\u8c03\u7528\u5b83\u4eec\u3002<\/li>\n<\/ul>\n<p>\u4ee3\u7801\u89e3\u8bfb<\/p>\n<p>\u590d\u5236\u4ee3\u7801<\/p>\n<p>cpp <\/p>\n<p>\u6df1\u8272\u7248\u672c<\/p>\n<p>php<\/p>\n<p>\u4ee3\u7801\u89e3\u8bfb<\/p>\n<p>\u590d\u5236\u4ee3\u7801<\/p>\n<p>class ConnectionHandler { public: void handle_read(const boost::system::error_code&amp; error, size_t bytes_transferred); void handle_write(const boost::system::error_code&amp; error); }; void start_accept(boost::asio::io_context&amp; io_context, tcp::acceptor&amp; acceptor) { tcp::socket socket(io_context); acceptor.async_accept(socket, [&amp;](const boost::system::error_code&amp; error) { if (!error) { \/\/ \u5206\u914d\u4e00\u4e2a\u65b0\u7684ConnectionHandler\u5b9e\u4f8b\u5904\u7406\u8fd9\u4e2a\u8fde\u63a5 auto handler &#061; std::make_shared&lt;ConnectionHandler&gt;(socket); handler-&gt;start(); start_accept(io_context, acceptor); \/\/ \u7ee7\u7eed\u63a5\u53d7\u4e0b\u4e00\u4e2a\u8fde\u63a5 } }); } \/\/ \u5728main\u51fd\u6570\u4e2d\u542f\u52a8 start_accept(io_context, acceptor); io_context.run(); \/\/ \u8fdb\u5165reactor loop <\/p>\n<h3>3. \u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93<\/h3>\n<ul>\n<li>\u96f6\u62f7\u8d1d\u6280\u672f&#xff1a;\u5c3d\u53ef\u80fd\u51cf\u5c11\u5185\u5b58\u4e4b\u95f4\u7684\u6570\u636e\u590d\u5236&#xff0c;\u63d0\u9ad8\u4f20\u8f93\u6548\u7387\u3002<\/li>\n<li>\u5f02\u6b65I\/O&#xff1a;\u5229\u7528Boost.Asio\u63d0\u4f9b\u7684\u5f02\u6b65\u63a5\u53e3&#xff0c;\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b&#xff0c;\u540c\u65f6\u4fdd\u8bc1\u9ad8\u5e76\u53d1\u4e0b\u7684\u5feb\u901f\u54cd\u5e94\u3002<\/li>\n<\/ul>\n<h3>4. \u5e76\u53d1\u63a7\u5236<\/h3>\n<ul>\n<li>\u7ebf\u7a0b\u6c60&#xff1a;\u6839\u636e\u7cfb\u7edf\u7684\u786c\u4ef6\u914d\u7f6e\u521b\u5efa\u9002\u5f53\u6570\u91cf\u7684\u5de5\u4f5c\u7ebf\u7a0b&#xff0c;\u5206\u914d\u7ed9\u4e0d\u540c\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u3002<\/li>\n<li>\u9501\u673a\u5236&#xff1a;\u5bf9\u4e8e\u5171\u4eab\u8d44\u6e90\u7684\u64cd\u4f5c&#xff0c;\u91c7\u7528\u9002\u5f53\u7684\u540c\u6b65\u7b56\u7565&#xff08;\u5982\u4e92\u65a5\u9501\u3001\u8bfb\u5199\u9501&#xff09;\u6765\u4fdd\u62a4\u6570\u636e\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u7b2c\u56db\u90e8\u5206&#xff1a;\u4f18\u5316\u4e0e\u6269\u5c55<\/h3>\n<h3>\u6027\u80fd\u4f18\u5316<\/h3>\n<ul>\n<li>\u8d1f\u8f7d\u5747\u8861&#xff1a;\u5982\u679c\u5355\u4e2a\u670d\u52a1\u5668\u65e0\u6cd5\u627f\u53d7\u6240\u6709\u6d41\u91cf&#xff0c;\u8003\u8651\u4f7f\u7528\u8d1f\u8f7d\u5747\u8861\u8bbe\u5907\u5206\u6563\u8bf7\u6c42\u3002<\/li>\n<li>\u7f13\u5b58\u673a\u5236&#xff1a;\u5bf9\u4e8e\u9891\u7e41\u8bbf\u95ee\u7684\u6570\u636e&#xff0c;\u53ef\u4ee5\u8bbe\u7f6e\u672c\u5730\u7f13\u5b58\u4ee5\u51cf\u8f7b\u6570\u636e\u5e93\u538b\u529b\u3002<\/li>\n<li>\u8fde\u63a5\u590d\u7528&#xff1a;\u4fdd\u6301\u957f\u8fde\u63a5&#xff0c;\u51cf\u5c11TCP\u4e09\u6b21\u63e1\u624b\u5e26\u6765\u7684\u5f00\u9500\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u63aa\u65bd<\/h3>\n<ul>\n<li>SSL\/TLS\u52a0\u5bc6&#xff1a;\u786e\u4fdd\u6570\u636e\u5728\u7f51\u7edc\u4e0a\u4f20\u8f93\u65f6\u7684\u5b89\u5168\u6027&#xff0c;\u9632\u6b62\u4fe1\u606f\u6cc4\u9732\u3002<\/li>\n<li>\u8eab\u4efd\u9a8c\u8bc1&#xff1a;\u5b9e\u65bd\u4e25\u683c\u7684\u7528\u6237\u8ba4\u8bc1\u6d41\u7a0b&#xff0c;\u963b\u6b62\u672a\u6388\u6743\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<h3>\u65e5\u5fd7\u8bb0\u5f55\u4e0e\u76d1\u63a7<\/h3>\n<ul>\n<li>\u65e5\u5fd7\u7cfb\u7edf&#xff1a;\u96c6\u6210\u4e13\u4e1a\u7684\u65e5\u5fd7\u7ba1\u7406\u5de5\u5177&#xff0c;\u5e2e\u52a9\u8bca\u65ad\u95ee\u9898\u5e76\u8ddf\u8e2a\u7cfb\u7edf\u884c\u4e3a\u3002<\/li>\n<li>\u6027\u80fd\u76d1\u63a7&#xff1a;\u90e8\u7f72Prometheus\u3001Grafana\u7b49\u5de5\u5177&#xff0c;\u5b9e\u65f6\u76d1\u6d4b\u670d\u52a1\u5668\u7684\u5404\u9879\u6307\u6807\u3002<\/li>\n<\/ul>\n<hr 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