{"id":591,"date":"2019-09-11T14:21:06","date_gmt":"2019-09-11T05:21:06","guid":{"rendered":"http:\/\/hirlab.net\/nblog\/?p=591"},"modified":"2020-05-01T13:23:48","modified_gmt":"2020-05-01T04:23:48","slug":"%e3%80%90c%e3%80%91%e6%a8%99%e6%ba%96%e3%83%a9%e3%82%a4%e3%83%96%e3%83%a9%e3%83%aa%e3%81%a7%e4%b8%a6%e5%88%97%e5%87%a6%e7%90%86%e3%82%92%e3%82%84%e3%81%a3%e3%81%a6%e3%81%bf%e3%82%8b%e3%80%90stdthr","status":"publish","type":"post","link":"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/","title":{"rendered":"\u3010C++\u3011\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u4e26\u5217\u51e6\u7406\u3092\u3084\u3063\u3066\u307f\u308b\u3010std::thread\u3011"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_11 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u30b3\u30f3\u30c6\u30f3\u30c4<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E4%B8%A6%E5%88%97%E5%87%A6%E7%90%86\" title=\"\u4e26\u5217\u51e6\u7406\">\u4e26\u5217\u51e6\u7406<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#std_thread\" title=\"std::thread\">std::thread<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%82%B5%E3%83%B3%E3%83%97%E3%83%AB%E3%82%B3%E3%83%BC%E3%83%89\" title=\"\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\">\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#CMakeLists_txt\" title=\"CMakeLists.txt\">CMakeLists.txt<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%81%9D%E3%81%AE%EF%BC%91%EF%BC%9A%E6%84%8F%E5%91%B3%E3%81%AA%E3%81%97%E6%9C%80%E4%BD%8E%E9%99%90%E3%82%B3%E3%83%BC%E3%83%89\" title=\"\u305d\u306e\uff11\uff1a\u610f\u5473\u306a\u3057\u6700\u4f4e\u9650\u30b3\u30fc\u30c9\">\u305d\u306e\uff11\uff1a\u610f\u5473\u306a\u3057\u6700\u4f4e\u9650\u30b3\u30fc\u30c9<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%81%9D%E3%81%AE%EF%BC%92%EF%BC%9A%E5%85%B1%E6%9C%89%E5%A4%89%E6%95%B0%E3%81%82%E3%82%8B%E5%A0%B4%E5%90%88\" title=\"\u305d\u306e\uff12\uff1a\u5171\u6709\u5909\u6570\u3042\u308b\u5834\u5408\">\u305d\u306e\uff12\uff1a\u5171\u6709\u5909\u6570\u3042\u308b\u5834\u5408<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%81%9D%E3%81%AE%EF%BC%93%EF%BC%9A%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A7%E6%89%B1%E3%81%86%E5%A0%B4%E5%90%88\" title=\"\u305d\u306e\uff13\uff1a\u30af\u30e9\u30b9\u3067\u6271\u3046\u5834\u5408\">\u305d\u306e\uff13\uff1a\u30af\u30e9\u30b9\u3067\u6271\u3046\u5834\u5408<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%81%9D%E3%81%AE%EF%BC%94%EF%BC%9A%E4%BB%96%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%AE%E3%83%A1%E3%83%B3%E3%83%90%E9%96%A2%E6%95%B0%E3%82%92%E4%B8%A6%E5%88%97%E5%87%A6%E7%90%86\" title=\"\u305d\u306e\uff14\uff1a\u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u4e26\u5217\u51e6\u7406\">\u305d\u306e\uff14\uff1a\u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u4e26\u5217\u51e6\u7406<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E8%BF%BD%E8%A8%98%EF%BC%9A%E3%83%A1%E3%83%B3%E3%83%90%E5%A4%89%E6%95%B0%E3%81%A8%E3%81%97%E3%81%A6mutex%E3%82%92%E5%AE%9A%E7%BE%A9%E3%81%97%E3%81%9F%E5%A0%B4%E5%90%88%E3%82%B3%E3%83%94%E3%83%BC%E3%81%AF%E3%81%A7%E3%81%8D%E3%81%AA%E3%81%84\" title=\"\u8ffd\u8a18\uff1a\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066mutex\u3092\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u30b3\u30d4\u30fc\u306f\u3067\u304d\u306a\u3044\">\u8ffd\u8a18\uff1a\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066mutex\u3092\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u30b3\u30d4\u30fc\u306f\u3067\u304d\u306a\u3044<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_591\/#%E3%81%8A%E3%82%8F%E3%82%8A%E3%81%AB\" title=\"\u304a\u308f\u308a\u306b\">\u304a\u308f\u308a\u306b<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%A6%E5%88%97%E5%87%A6%E7%90%86\"><\/span>\u4e26\u5217\u51e6\u7406<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/\">\u524d\u56de<\/a>\u306f\uff0cOpenMP\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u4e26\u5217\u51e6\u7406\u3092\u884c\u3044\u307e\u3057\u305f\uff0e<\/p>\n<p>\u3057\u304b\u3057\uff0c\u5b9f\u969b\u306b\u5927\u304d\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u6271\u304a\u3046\u3068\u3057\u305f\u6642\u306b\uff0c\u3042\u307e\u308a\u52b9\u679c\u304c\u73fe\u308c\u305a\uff0c<strong><mark>\u3080\u3057\u308d\u4e26\u5217\u5316\u3055\u305b\u308b\u5834\u6240\u306b\u3088\u3063\u3066\u306f\u9045\u304f\u306a\u3063\u3066\u3057\u307e\u3046<\/mark><\/strong>\u4e8b\u614b\u306b\u898b\u821e\u308f\u308c\u307e\u3057\u305f\uff0e<\/p>\n<p>\u305d\u3053\u3067\u521d\u5fc3\u306b\u5e30\u3063\u3066(?)\uff0cC++11\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u300cThread\u300d\u3092\u4f7f\u3063\u3066\u4e26\u5217\u51e6\u7406\u3092\u3084\u3063\u3066\u307f\u3088\u3046\uff0c\u3068\u3044\u3046\u8003\u3048\u306b\u81f3\u308a\u307e\u3057\u305f\uff0e<\/p>\n<p>\u5099\u5fd8\u9332\u7684\u306a\u90e8\u5206\u304c\u3042\u308a\u307e\u3059\u304c\uff0c\u3069\u3046\u304b\u304a\u4ed8\u304d\u5408\u3044\u304f\u3060\u3055\u3044\uff0e<\/p>\n<h2><span class=\"ez-toc-section\" id=\"std_thread\"><\/span>std::thread<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5148\u307b\u3069\u3082\u8a00\u3044\u307e\u3057\u305f\u304c\uff0c<mark>C++11\u304b\u3089\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea<\/mark>\u306e\u3072\u3068\u3064\u3068\u306a\u308a\u307e\u3057\u305f\uff0e<\/p>\n<p>\u3067\u3059\u306e\u3067\uff0c\u3053\u308c\u3067\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u306f\uff0cOpenMP\u307f\u305f\u304f\u4e0b\u6e96\u5099\u7684\u306a\u3082\u306e\u304c<mark>\u591a\u5206\u3044\u3089\u306a\u3044<\/mark>\u306f\u305a\u3067\u3059\uff0e<\/p>\n<p>\u6c17\u3092\u3064\u3051\u308b\u3079\u304d\u3053\u3068\u3068\u3057\u3066\u306f\uff0c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\uff0c\u300c-std=c++11\u300d(14\u3067\u308217\u3067\u3082\u826f\u3044)\u3092\u3064\u3051\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u304b\uff0e<\/p>\n<p>\u79c1\u306fCMakeLists\u3067\u7ba1\u7406\u3057\u3066\u3044\u308b\u306e\u3067\uff0c\u3055\u307b\u3069\u5927\u304d\u306a\u554f\u984c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\uff0e<\/p>\n<p>\u3055\u3063\u305d\u304f\u8a66\u3057\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff0e<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%82%B5%E3%83%B3%E3%83%97%E3%83%AB%E3%82%B3%E3%83%BC%E3%83%89\"><\/span>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"CMakeLists_txt\"><\/span>CMakeLists.txt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4eca\u56de\u306f\u4eee\u306b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\u306f\u300cparallel_sample\u300d\u3068\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">cmake_minimum_required(VERSION 3.14) # \u306a\u3093\u3067\u3082\u3088\u3044\r\nproject(parallel_sample)\r\n\r\nset(CMAKE_CXX_STANDARD 11)  # C++11\u4ee5\u964d\u3092\u6307\u5b9a\r\n\r\nadd_executable(parallel_sample main.cpp)<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%81%AE%EF%BC%91%EF%BC%9A%E6%84%8F%E5%91%B3%E3%81%AA%E3%81%97%E6%9C%80%E4%BD%8E%E9%99%90%E3%82%B3%E3%83%BC%E3%83%89\"><\/span>\u305d\u306e\uff11\uff1a\u610f\u5473\u306a\u3057\u6700\u4f4e\u9650\u30b3\u30fc\u30c9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u307e\u305a\u306f\u5fc5\u8981\u6700\u4f4e\u9650\u306e\u30b3\u30fc\u30c9\u304b\u3089\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;thread&gt;\r\n#include &lt;vector&gt;\r\n\r\nusing namespace std;\r\n\r\nint main() {\r\n\r\n    vector&lt;thread&gt; threads;\r\n\r\n    cout &lt;&lt; \"\u6700\u5927\u30b9\u30ec\u30c3\u30c9\u6570: \"  &lt;&lt; thread::hardware_concurrency() &lt;&lt; endl;\r\n\r\n    for( int i = 0; i &lt; 100; ++i ){\r\n        threads.emplace_back(\r\n                \/\/ \u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u30b9\u30ec\u30c3\u30c9\u306b\u6295\u3052\u308b\r\n                [](){}\r\n        );\r\n    }\r\n\r\n    \/\/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u540c\u671f\u5f85\u3061\r\n    for(auto&amp; t : threads) {\r\n        t.join();\r\n    }\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u300c\u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u300d\u3092\u4eca\u56de\u306f\uff0c<mark>\u4f55\u3082\u3057\u306a\u3044\u30e9\u30e0\u30c0\u5f0f<\/mark>\u3067\u66f8\u3044\u3066\u3044\u307e\u3059\u304c\uff0c\u3082\u3061\u308d\u3093\u95a2\u6570\u3067\u3082\u3044\u3044\u308f\u3051\u3067\u3059\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;thread&gt;\r\n#include &lt;vector&gt;\r\n\r\nusing namespace std;\r\n\r\nvoid func(){}  \/\/ \u4f55\u304b\u3057\u3089\u306e\u95a2\u6570\r\n\r\nint main() {\r\n\r\n    vector&lt;thread&gt; threads;\r\n\r\n    cout &lt;&lt; \"\u6700\u5927\u30b9\u30ec\u30c3\u30c9\u6570: \"  &lt;&lt; thread::hardware_concurrency() &lt;&lt; endl;\r\n\r\n    for( int i = 0; i &lt; 100; ++i ){\r\n        threads.emplace_back(\r\n                \/\/ \u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u30b9\u30ec\u30c3\u30c9\u306b\u6295\u3052\u308b\r\n                func\r\n        );\r\n    }\r\n\r\n    \/\/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u540c\u671f\u5f85\u3061\r\n    for(auto&amp; t : threads) {\r\n        t.join();\r\n    }\r\n\r\n    return 0;\r\n}<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%81%AE%EF%BC%92%EF%BC%9A%E5%85%B1%E6%9C%89%E5%A4%89%E6%95%B0%E3%81%82%E3%82%8B%E5%A0%B4%E5%90%88\"><\/span>\u305d\u306e\uff12\uff1a\u5171\u6709\u5909\u6570\u3042\u308b\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30b9\u30ec\u30c3\u30c9\u9593\u3067\uff0c\u5171\u6709\u306e\u5909\u6570\u3092\u6271\u3046\u5834\u5408\u306f\u300cstd::mutex\u300d\u3092\u4f7f\u3044\u307e\u3059\uff0e<\/p>\n<p>\u66f8\u304d\u65b9\u306f\u4e3b\u306b\uff12\u7a2e\u985e\u3042\u3063\u3066\uff0c\u3069\u3061\u3089\u3082<mark>\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u3092\u30ed\u30c3\u30af\u3057\u3066\uff0c\u7528\u304c\u6e08\u3093\u3060\u3089\u30a2\u30f3\u30ed\u30c3\u30af\u3059\u308b<\/mark>\u4f5c\u696d\u3092\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\uff0e<\/p>\n<p><mark><strong>lock()\u3068unlock()\u3092\u660e\u793a\u7684\u306b\u66f8\u304f<\/strong><\/mark>\u5834\u5408\u306f\uff0c<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;thread&gt;\r\n#include &lt;vector&gt;\r\n\r\n#include &lt;mutex&gt; \/\/\/ new\r\n\r\nusing namespace std;\r\n\r\nmutex mtx; \/\/! \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\r\nint sum = 0; \/\/! \u5171\u6709\u3059\u308b\u5909\u6570\r\n\r\nvoid func(){\r\n    mtx.lock();\r\n    sum += 1;\r\n    mtx.unlock();\r\n}\r\n\r\nint main() {\r\n\r\n    vector&lt;thread&gt; threads;\r\n\r\n    cout &lt;&lt; \"\u6700\u5927\u30b9\u30ec\u30c3\u30c9\u6570: \"  &lt;&lt; thread::hardware_concurrency() &lt;&lt; endl;\r\n\r\n    for( int i = 0; i &lt; 100; ++i ){\r\n        threads.emplace_back(\r\n                \/\/ \u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u30b9\u30ec\u30c3\u30c9\u306b\u6295\u3052\u308b\r\n                func\r\n        );\r\n    }\r\n\r\n    \/\/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u540c\u671f\u5f85\u3061\r\n    for(auto&amp; t : threads) {\r\n        t.join();\r\n    }\r\n\r\n    cout &lt;&lt; sum &lt;&lt; endl;\r\n\r\n    return 0;\r\n}<\/pre>\n<p><mark><strong>lock_guard\u30af\u30e9\u30b9\u3092\u7528\u3044\u308b<\/strong><\/mark>\u5834\u5408\u306f\uff0c<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;thread&gt;\r\n#include &lt;vector&gt;\r\n\r\n#include &lt;mutex&gt; \/\/\/ new\r\n\r\nusing namespace std;\r\n\r\nmutex mtx; \/\/! \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\r\nint sum = 0; \/\/! \u5171\u6709\u3059\u308b\u5909\u6570\r\n\r\nvoid func(){\r\n    lock_guard&lt;mutex&gt; lock(mtx);   \/\/\/ \u3053\u3053\u304c\u9055\u3046\r\n    sum += 1;\r\n}\r\n\r\nint main() {\r\n\r\n    vector&lt;thread&gt; threads;\r\n\r\n    cout &lt;&lt; \"\u6700\u5927\u30b9\u30ec\u30c3\u30c9\u6570: \"  &lt;&lt; thread::hardware_concurrency() &lt;&lt; endl;\r\n\r\n    for( int i = 0; i &lt; 100; ++i ){\r\n        threads.emplace_back(\r\n                \/\/ \u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u30b9\u30ec\u30c3\u30c9\u306b\u6295\u3052\u308b\r\n                func\r\n        );\r\n    }\r\n\r\n    \/\/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u540c\u671f\u5f85\u3061\r\n    for(auto&amp; t : threads) {\r\n        t.join();\r\n    }\r\n\r\n    cout &lt;&lt; sum &lt;&lt; endl;\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\uff0e<\/p>\n<p>lock_guard\u306f\uff0c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067lock\u3057\u3066\uff0c\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067unlock\u3059\u308b\u306e\u3067\uff0c\u305d\u306e<mark>\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u5168\u4f53(lock_guard\u304c\u7834\u68c4\u3055\u308c\u308b\u307e\u3067)\u304c\u6392\u4ed6\u5236\u5fa1<\/mark>\u3068\u306a\u308b\uff0e<\/p>\n<p>\u8a66\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u5206\u304b\u3089\u306a\u3044\u304c\uff0c\u524d\u8005\u306e\u65b9\u304c\u65e9\u305d\u3046\u306a\u6c17\u306f\u3059\u308b\uff0e<\/p>\n<p>\u591a\u5206\u3042\u3093\u307e\u308a\u5909\u308f\u3089\u306a\u3044\uff1f<\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-7123758399787647\"\n     data-ad-slot=\"1665651601\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%81%AE%EF%BC%93%EF%BC%9A%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A7%E6%89%B1%E3%81%86%E5%A0%B4%E5%90%88\"><\/span>\u305d\u306e\uff13\uff1a\u30af\u30e9\u30b9\u3067\u6271\u3046\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30af\u30e9\u30b9\u3067\u3082\u66f8\u304d\u65b9\u306f\u7279\u306b\u5909\u308f\u3089\u306a\u3044\uff0e<\/p>\n<p>\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u306f\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066\u4fdd\u6301\u3057\u3066\u304a\u3044\u3066\u826f\u3044\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;thread&gt;\r\n#include &lt;mutex&gt;\r\n#include &lt;vector&gt;\r\n\r\nusing namespace std;\r\n\r\nclass Sample{\r\nprivate:\r\n    int sum;  \/\/! \u5171\u6709\u5909\u6570\r\n    mutex mtx;  \/\/! \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\r\n\r\npublic:\r\n    Sample(): sum(0){};  \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\r\n\r\n    static int calc(int x){  \/\/ \u4e26\u5217\u51e6\u7406\u3055\u305b\u308b\u95a2\u6570\r\n        return 2 * x;\r\n    }\r\n\r\n    void parallel(){  \/\/ \u4e26\u5217\u51e6\u7406\u3092\u884c\u3046\u672c\u4f53\r\n        vector&lt;thread&gt; threads;\r\n        for( int i = 0; i &lt; 1000; ++i ){\r\n            threads.emplace_back(\r\n                    [i, this](){\r\n                        mtx.lock();\r\n                        sum += calc(i);\r\n                        mtx.unlock();\r\n                    }\r\n            );\r\n        }\r\n\r\n        for(auto&amp; t : threads) {\r\n            t.join();\r\n        }\r\n    }\r\n\r\n    int get_Sum(){  \/\/ sum\u306egetter\r\n        return sum;\r\n    }\r\n};\r\n\r\nint main() {\r\n\r\n    Sample c;\r\n    c.parallel();\r\n\r\n    cout &lt;&lt; c.get_Sum() &lt;&lt; endl;\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u3053\u3093\u306a\u611f\u3058\uff0e<\/p>\n<p>\u4e26\u5217\u51e6\u7406\u3068\u95a2\u4fc2\u306a\u3044\u3051\u3069\uff0c\u30e1\u30f3\u30d0\u95a2\u6570\u5185\u3067\u30e9\u30e0\u30c0\u5f0f\u3092\u66f8\u304f\u6642\u306b\uff0c<mark><strong>this<\/strong><\/mark>\u3092\u5fd8\u308c\u304c\u3061\uff0e<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%81%AE%EF%BC%94%EF%BC%9A%E4%BB%96%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%AE%E3%83%A1%E3%83%B3%E3%83%90%E9%96%A2%E6%95%B0%E3%82%92%E4%B8%A6%E5%88%97%E5%87%A6%E7%90%86\"><\/span>\u305d\u306e\uff14\uff1a\u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u4e26\u5217\u51e6\u7406<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3082\u3057\u304b\u3057\u305f\u3089\uff0c<mark>\u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u30b9\u30ec\u30c3\u30c9\u306b\u6295\u3052\u305f\u3044<\/mark>\u304b\u3082\u3057\u308c\u306a\u3044\uff0e<\/p>\n<p>\u305d\u3093\u306a\u3068\u304d\u306f\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u308b\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">void parallel(){  \/\/ \u4e26\u5217\u51e6\u7406\u3092\u884c\u3046\u672c\u4f53\r\n    vector&lt;thread&gt; threads;\r\n    Another a;\r\n    for( int i = 0; i &lt; 1000; ++i ){\r\n        \/\/ \u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3068\uff0c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u30bb\u30c3\u30c8\u3067\u53c2\u7167\u6e21\u3057\u3059\u308b\r\n        threads.emplace_back( &amp;Another::func, &amp;a );\r\n    }\r\n\r\n    for(auto&amp; t : threads) {\r\n        t.join();\r\n    }\r\n}<\/pre>\n<p>\u30b3\u30e1\u30f3\u30c8\u306b\u66f8\u3044\u3066\u3042\u308b\u8aac\u660e\u304c\u9069\u5207\u304b\u306f\u5206\u304b\u3089\u306a\u3044\u304c\uff0c\u3068\u308a\u3042\u3048\u305a\u66f8\u304d\u65b9\u306f\u3053\u3046\uff0e\u7b11<\/p>\n<p>\u3082\u3061\u308d\u3093\u30e9\u30e0\u30c0\u5f0f\u3067\u66f8\u3044\u3066\u3082OK\u3060\u3068\u601d\u3046\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">void parallel(){  \/\/ \u4e26\u5217\u51e6\u7406\u3092\u884c\u3046\u672c\u4f53\r\n        vector&lt;thread&gt; threads;\r\n        Another a;\r\n        for( int i = 0; i &lt; 1000; ++i ){\r\n            \r\n            threads.emplace_back( \r\n                    [&amp;a](){\r\n                       a.func(); \r\n                    }\r\n                    );\r\n        }\r\n\r\n        for(auto&amp; t : threads) {\r\n            t.join();\r\n        }\r\n    }<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"%E8%BF%BD%E8%A8%98%EF%BC%9A%E3%83%A1%E3%83%B3%E3%83%90%E5%A4%89%E6%95%B0%E3%81%A8%E3%81%97%E3%81%A6mutex%E3%82%92%E5%AE%9A%E7%BE%A9%E3%81%97%E3%81%9F%E5%A0%B4%E5%90%88%E3%82%B3%E3%83%94%E3%83%BC%E3%81%AF%E3%81%A7%E3%81%8D%E3%81%AA%E3%81%84\"><\/span>\u8ffd\u8a18\uff1a\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066mutex\u3092\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u30b3\u30d4\u30fc\u306f\u3067\u304d\u306a\u3044<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8a18\u4e8b\u516c\u958b\u3057\u306630\u5206\u3067\u8ffd\u8a18\u3092\u66f8\u3044\u3066\u307e\u3059\uff0e\u7b11<\/p>\n<p>\u306a\u306b\u304b\u3068\u3044\u3046\u3068\uff0c\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066mutex\u3092\u5b9a\u7fa9\u3059\u308b\u3068\uff0c\u305d\u306e\u30af\u30e9\u30b9\u306fmutex\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u4e0a\u30b3\u30d4\u30fc\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\uff0e<\/p>\n<p>\u4f8b\u3048\u3070\uff0c<\/p>\n<pre class=\"lang:c++ decode:true\">Sample s1;\r\nauto s2 = s1;<\/pre>\n<p>\u3068\u304b\u306f\u3067\u304d\u306a\u3044\uff0c\u3063\u3066\u3053\u3068\u3067\u3059\uff0e<\/p>\n<p>\u306a\u305c\u304b\u3068\u3044\u3046\u3068\uff0c<mark> mutex\u306f\u30b3\u30d4\u30fc\u3082\u79fb\u52d5\u3082\u8a31\u3055\u308c\u3066\u3044\u306a\u3044<\/mark>\u3088\u3046\u3067\u3059\uff0e<\/p>\n<p>\u3059\u306a\u308f\u3061\uff0c\u305d\u308c\u3092\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066\u6301\u3063\u3066\u3044\u308b\u30af\u30e9\u30b9\u3082\uff0c\u30b3\u30d4\u30fc\u306f\u4e0d\u53ef\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n<p>\u3053\u308c\u3067\uff0c\u3055\u304d\u307b\u3069\u30a8\u30e9\u30fc\u306b\u60a9\u307e\u3055\u308c\u307e\u3057\u305f\uff0e<\/p>\n<p>\u306a\u306e\u3067\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3082\u4e0d\u53ef\u80fd\u3067\u3059\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">Sample s = Sample();<\/pre>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%8A%E3%82%8F%E3%82%8A%E3%81%AB\"><\/span>\u304a\u308f\u308a\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4eca\u56de\u3082\uff0c\u6700\u8fd1\u50d5\u304c\u30cf\u30de\u3063\u3066\u3044\u308b\uff1f\u4e26\u5217\u51e6\u7406\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3057\u305f\uff0e<\/p>\n<p>\u307e\u3060\u52c9\u5f37\u4e2d\u6545\u306b\u5168\u3066\u7406\u89e3\u3067\u304d\u3066\u304a\u3089\u305a\uff0c\u3082\u3057\u304b\u3057\u305f\u3089\u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306a\u66f8\u304d\u65b9\u304c\u3042\u308b\u306e\u304b\u3082\u3057\u308c\u306a\u3044\uff0e<\/p>\n<p>\u500b\u4eba\u7684\u306b\u306f\uff0cOpenMP\u3088\u308a\u3053\u3046\u3044\u3046\u98a8\u306b\u660e\u793a\u7684\u306b\u66f8\u304f\u65b9\u304c\u597d\u304d\u3067\u3059\uff0e<\/p>\n<p>\u30d6\u30e9\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3059\u304e\u308b\u306e\u306f\uff0c\u4fbf\u5229\u306a\u53cd\u9762\u3042\u307e\u308a\u52c9\u5f37\u306b\u306a\u3089\u306a\u3044\u304b\u3089\u597d\u304d\u3058\u3083\u306a\u3044\u3093\u3067\u3059\u3088\u306d...<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b3\u30f3\u30c6\u30f3\u30c4 \u4e26\u5217\u51e6\u7406std::thread\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9CMakeLists.txt\u305d\u306e\uff11\uff1a\u610f\u5473\u306a\u3057\u6700\u4f4e\u9650\u30b3\u30fc\u30c9\u305d\u306e\uff12\uff1a\u5171\u6709\u5909\u6570\u3042\u308b\u5834\u5408\u305d\u306e\uff13\uff1a\u30af\u30e9\u30b9\u3067\u6271\u3046\u5834\u5408\u305d\u306e\uff14\uff1a\u4ed6\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u4e26\u5217\u51e6\u7406\u8ffd\u8a18\uff1a\u30e1\u30f3\u30d0\u5909\u6570\u3068\u3057\u3066 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":595,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[12,25,55,56],"_links":{"self":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/591"}],"collection":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/comments?post=591"}],"version-history":[{"count":5,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/591\/revisions"}],"predecessor-version":[{"id":793,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/591\/revisions\/793"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/media\/595"}],"wp:attachment":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/media?parent=591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/categories?post=591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/tags?post=591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}