{"id":91319,"date":"2024-03-21T13:43:23","date_gmt":"2024-03-21T04:43:23","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%83%97%e3%83%bc%e3%83%ab%e3%81%ae%e4%bd%9c%e3%82%8a%e6%96%b9%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-03-27T18:32:10","modified_gmt":"2024-03-27T09:32:10","slug":"c%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%83%97%e3%83%bc%e3%83%ab%e3%81%ae%e4%bd%9c%e3%82%8a%e6%96%b9%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%83%97%e3%83%bc%e3%83%ab%e3%81%ae%e4%bd%9c%e3%82%8a%e6%96%b9%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"C++\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u4f5c\u308a\u65b9\u3068\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>C++\u3067\u306f\u3001std::thread\u3068std::vector\u3092\u4f7f\u3063\u3066\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f5c\u6210\u30fb\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u4f8b\u3092\u6319\u3052\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;vector&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;thread&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;functional&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;mutex&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;condition_variable&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;queue&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ThreadPool<\/span> {\r\n<span class=\"hljs-keyword\">public<\/span>:\r\n    <span class=\"hljs-built_in\">ThreadPool<\/span>(<span class=\"hljs-type\">int<\/span> numThreads) : <span class=\"hljs-built_in\">stop<\/span>(<span class=\"hljs-literal\">false<\/span>) {\r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; numThreads; ++i) {\r\n            workers.<span class=\"hljs-built_in\">emplace_back<\/span>([<span class=\"hljs-keyword\">this<\/span>] {\r\n                <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\n                    std::function&lt;<span class=\"hljs-built_in\">void<\/span>()&gt; task;\r\n                    {\r\n                        std::unique_lock&lt;std::mutex&gt; <span class=\"hljs-built_in\">lock<\/span>(queueMutex);\r\n                        condition.<span class=\"hljs-built_in\">wait<\/span>(lock, [<span class=\"hljs-keyword\">this<\/span>] { <span class=\"hljs-keyword\">return<\/span> stop || !tasks.<span class=\"hljs-built_in\">empty<\/span>(); });\r\n                        <span class=\"hljs-keyword\">if<\/span> (stop &amp;&amp; tasks.<span class=\"hljs-built_in\">empty<\/span>()) {\r\n                            <span class=\"hljs-keyword\">return<\/span>;\r\n                        }\r\n                        task = std::<span class=\"hljs-built_in\">move<\/span>(tasks.<span class=\"hljs-built_in\">front<\/span>());\r\n                        tasks.<span class=\"hljs-built_in\">pop<\/span>();\r\n                    }\r\n                    <span class=\"hljs-built_in\">task<\/span>();\r\n                }\r\n            });\r\n        }\r\n    }\r\n\r\n    ~<span class=\"hljs-built_in\">ThreadPool<\/span>() {\r\n        {\r\n            <span class=\"hljs-function\">std::unique_lock&lt;std::mutex&gt; <span class=\"hljs-title\">lock<\/span><span class=\"hljs-params\">(queueMutex)<\/span><\/span>;\r\n            stop = <span class=\"hljs-literal\">true<\/span>;\r\n        }\r\n        condition.<span class=\"hljs-built_in\">notify_all<\/span>();\r\n        <span class=\"hljs-keyword\">for<\/span> (std::thread&amp; worker : workers) {\r\n            worker.<span class=\"hljs-built_in\">join<\/span>();\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">template<\/span>&lt;<span class=\"hljs-keyword\">typename<\/span> F, <span class=\"hljs-keyword\">typename<\/span>... Args&gt;\r\n    <span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">addTask<\/span><span class=\"hljs-params\">(F&amp;&amp; f, Args&amp;&amp;... args)<\/span> <\/span>{\r\n        {\r\n            <span class=\"hljs-function\">std::unique_lock&lt;std::mutex&gt; <span class=\"hljs-title\">lock<\/span><span class=\"hljs-params\">(queueMutex)<\/span><\/span>;\r\n            tasks.<span class=\"hljs-built_in\">emplace<\/span>([f=std::forward&lt;F&gt;(f), args=std::<span class=\"hljs-built_in\">make_tuple<\/span>(std::forward&lt;Args&gt;(args)...)] {\r\n                std::<span class=\"hljs-built_in\">apply<\/span>(f, args);\r\n            });\r\n        }\r\n        condition.<span class=\"hljs-built_in\">notify_one<\/span>();\r\n    }\r\n\r\n<span class=\"hljs-keyword\">private<\/span>:\r\n    std::vector&lt;std::thread&gt; workers;\r\n    std::queue&lt;std::function&lt;<span class=\"hljs-type\">void<\/span>()&gt;&gt; tasks;\r\n    std::mutex queueMutex;\r\n    std::condition_variable condition;\r\n    <span class=\"hljs-type\">bool<\/span> stop;\r\n};\r\n\r\n<span class=\"hljs-comment\">\/\/ \u793a\u4f8b\u4efb\u52a1\u51fd\u6570<\/span>\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">void<\/span> <span class=\"hljs-title\">exampleTask<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> id)<\/span> <\/span>{\r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"Task \"<\/span> &lt;&lt; id &lt;&lt; <span class=\"hljs-string\">\" executed\"<\/span> &lt;&lt; std::endl;\r\n}\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u7ebf\u7a0b\u6c60\u5e76\u6307\u5b9a\u7ebf\u7a0b\u6570\u91cf<\/span>\r\n    <span class=\"hljs-function\">ThreadPool <span class=\"hljs-title\">pool<\/span><span class=\"hljs-params\">(<span class=\"hljs-number\">4<\/span>)<\/span><\/span>;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u6dfb\u52a0\u4efb\u52a1\u5230\u7ebf\u7a0b\u6c60<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-number\">8<\/span>; ++i) {\r\n        pool.<span class=\"hljs-built_in\">addTask<\/span>(exampleTask, i);\r\n    }\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u6240\u6709\u4efb\u52a1\u5b8c\u6210<\/span>\r\n    std::this_thread::<span class=\"hljs-built_in\">sleep_for<\/span>(std::chrono::<span class=\"hljs-built_in\">seconds<\/span>(<span class=\"hljs-number\">1<\/span>));\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001ThreadPool\u30af\u30e9\u30b9\u304c\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u4f5c\u6210\u3068\u7ba1\u7406\u306e\u30ed\u30b8\u30c3\u30af\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4e2d\u3067\u4f5c\u6210\u3059\u308b\u30b9\u30ec\u30c3\u30c9\u306e\u6570\u3092\u6307\u5b9a\u3057\u3001\u305d\u308c\u3092\u53d7\u3051\u3066\u5bfe\u5fdc\u3059\u308b\u6570\u306e\u30ef\u30fc\u30ab\u30fc\u30b9\u30ec\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u5404\u30ef\u30fc\u30ab\u30fc\u30b9\u30ec\u30c3\u30c9\u306f\u30bf\u30b9\u30af\u30ad\u30e5\u30fc\u304b\u3089\u30bf\u30b9\u30af\u3092\u53d6\u5f97\u3057\u3066\u5b9f\u884c\u3057\u3001\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u304c\u7834\u68c4\u3055\u308c\u308b\u304b\u505c\u6b62\u30d5\u30e9\u30b0\u304c\u30bb\u30c3\u30c8\u3055\u308c\u308b\u307e\u3067\u7d9a\u3051\u307e\u3059\u3002<\/p>\n<p>addTask()\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306b\u30bf\u30b9\u30af\u3092\u8ffd\u52a0\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30bf\u30b9\u30af\u306f\u547c\u3073\u51fa\u3057\u53ef\u80fd\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u3001\u30bf\u30b9\u30af\u30ad\u30e5\u30fc\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001condition.notify_one()\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u30ef\u30fc\u30ab\u30fc\u30b9\u30ec\u30c3\u30c9\u306b\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u3092\u958b\u59cb\u3055\u305b\u308b\u3088\u3046\u901a\u77e5\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30a4\u30f3\u95a2\u6570\u3067\u306f\u3001ThreadPool\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001addTask()\u95a2\u6570\u3067\u30b5\u30f3\u30d7\u30eb\u30bf\u30b9\u30af\u3092\u3044\u304f\u3064\u304b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001std::this_thread::sleep_for()\u3092\u4f7f\u7528\u3057\u3066\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3092\u30b9\u30ea\u30fc\u30d7\u3055\u305b\u3066\u3001\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092\u5f85\u3061\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u306f\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u4f5c\u6210\u65b9\u6cd5\u3068\u4f7f\u3044\u65b9\u306e\u8aac\u660e\u306b\u306e\u307f\u4f7f\u7528\u3055\u308c\u3001\u5b9f\u74b0\u5883\u3067\u4f7f\u7528\u3067\u304d\u308b\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u5b8c\u5168\u306a\u6a5f\u80fd\u3084\u5b89\u5b9a\u6027\u3092\u6301\u305f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5b9f\u969b\u306e\u4f7f\u7528\u3067\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3068\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u3067\u306f\u3001std::thread\u3068std::vector\u3092\u4f7f\u3063\u3066\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f5c\u6210\u30fb\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u4f8b\u3092\u6319\u3052\u3066\u307f\u307e\u3059\u3002 #include &lt;iostream&gt; #include &lt;vect [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-91319","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u4f5c\u308a\u65b9\u3068\u4f7f\u3044\u65b9 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u4f5c\u308a\u65b9\u3068\u4f7f\u3044\u65b9\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" 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