{"id":2079,"date":"2025-03-24T08:48:22","date_gmt":"2025-03-23T23:48:22","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2079"},"modified":"2025-03-24T08:48:48","modified_gmt":"2025-03-23T23:48:48","slug":"c%e9%96%8b%e7%99%ba%e8%80%85%e5%bf%85%e8%a6%8b%ef%bc%81stdmutex%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e5%ae%89%e5%85%a8%e3%81%aa%e4%b8%a6%e8%a1%8c%e5%87%a6%e7%90%86-%e5%ae%9f%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2079","title":{"rendered":"C++\u958b\u767a\u8005\u5fc5\u898b\uff01std::mutex\u3067\u5b9f\u73fe\u3059\u308b\u5b89\u5168\u306a\u4e26\u884c\u51e6\u7406 &#8211; \u5b9f\u8df5\u7684\u306a7\u3064\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">std::mutex\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u307e\u3067\u5b8c\u5168\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u4e26\u884c\u51e6\u7406\u306b\u304a\u3051\u308b\u6392\u4ed6\u5236\u5fa1\u306e\u91cd\u8981\u6027<\/a>      <\/li>      <li>        <a href=\"#i-2\">std::mutex\u30af\u30e9\u30b9\u306e\u7279\u5fb4\u3068\u57fa\u672c\u6a5f\u80fd<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">std::lock_guard\u3068std::unique_lock\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">std::mutex\u306e\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u306estd::mutex\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u751f\u7523\u8005\u30fb\u6d88\u8cbb\u8005\u30d1\u30bf\u30fc\u30f3\u306e\u5b89\u5168\u306a\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u8907\u6570\u30ea\u30bd\u30fc\u30b9\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u56de\u907f\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u6761\u4ef6\u5909\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u540c\u671f\u5236\u5fa1<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">std::mutex\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u30ed\u30c3\u30af\u306e\u7c92\u5ea6\u8a2d\u8a08\u306b\u3088\u308b\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u6539\u5584<\/a>      <\/li>      <li>        <a href=\"#i-11\">try_lock\u3092\u4f7f\u7528\u3057\u305f\u5f85\u6a5f\u6642\u9593\u306e\u524a\u6e1b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u30e1\u30e2\u30ea\u9806\u5e8f\u3068\u30a2\u30c8\u30df\u30c3\u30af\u64cd\u4f5c\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-13\">\u5b9f\u52d9\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b\u3068\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u5927\u898f\u6a21\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u8a2d\u8a08\u6226\u7565<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306b\u304a\u3051\u308b\u30ea\u30bd\u30fc\u30b9\u5236\u5fa1<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30ed\u30b0\u6a5f\u80fd\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">std::mutex\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u307e\u3067\u5b8c\u5168\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u4e26\u884c\u51e6\u7406\u306b\u304a\u3051\u308b\u6392\u4ed6\u5236\u5fa1\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u540c\u3058\u30ea\u30bd\u30fc\u30b9\u306b\u540c\u6642\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u7af6\u5408\uff08\u30c7\u30fc\u30bf\u30ec\u30fc\u30b9\uff09\u304c\u767a\u751f\u3057\u3001\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3084\u30d0\u30b0\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u554f\u984c\u3092\u9632\u3050\u305f\u3081\u306b\u3001C++\u3067\u306f<code>std::mutex<\/code>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u6392\u4ed6\u5236\u5fa1\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6392\u4ed6\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5178\u578b\u7684\u306a\u30b7\u30ca\u30ea\u30aa\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u6709\u30ab\u30a6\u30f3\u30bf\u30fc\u306e\u66f4\u65b0<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u66f8\u304d<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u7ba1\u7406<\/li>\n\n\n\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u66f8\u304d\u8fbc\u307f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">std::mutex\u30af\u30e9\u30b9\u306e\u7279\u5fb4\u3068\u57fa\u672c\u6a5f\u80fd<\/h3>\n\n\n\n<p><code>std::mutex<\/code>\u306f\u3001C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u540c\u671f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u3067\u3001\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u64cd\u4f5c\u3092\u63d0\u4f9b\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;mutex&gt;\n#include &lt;thread&gt;\n\nclass ThreadSafeCounter {\nprivate:\n    std::mutex mtx;  \/\/ \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n    int count = 0;   \/\/ \u4fdd\u8b77\u5bfe\u8c61\u306e\u30ea\u30bd\u30fc\u30b9\n\npublic:\n    void increment() {\n        mtx.lock();    \/\/ \u30ed\u30c3\u30af\u3092\u53d6\u5f97\n        ++count;       \/\/ \u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\n        mtx.unlock();  \/\/ \u30ed\u30c3\u30af\u3092\u89e3\u653e\n    }\n\n    int get_count() {\n        mtx.lock();\n        int temp = count;\n        mtx.unlock();\n        return temp;\n    }\n};<\/pre>\n\n\n\n<p>\u4e3b\u306a\u6a5f\u80fd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>lock()<\/code>: \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u306e\u30ed\u30c3\u30af\u3092\u53d6\u5f97<\/li>\n\n\n\n<li><code>unlock()<\/code>: \u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u306e\u30ed\u30c3\u30af\u3092\u89e3\u653e<\/li>\n\n\n\n<li><code>try_lock()<\/code>: \u30ce\u30f3\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u3067\u30ed\u30c3\u30af\u53d6\u5f97\u3092\u8a66\u307f\u308b<\/li>\n\n\n\n<li><code>native_handle()<\/code>: \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u30cf\u30f3\u30c9\u30eb\u3092\u53d6\u5f97<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">std::lock_guard\u3068std::unique_lock\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>C++\u3067\u306f\u3001RAII\u30d9\u30fc\u30b9\u306e\u30ed\u30c3\u30af\u7ba1\u7406\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002<code>std::lock_guard<\/code>\u3068<code>std::unique_lock<\/code>\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>std::lock_guard\u306e\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class SafeResource {\nprivate:\n    std::mutex mtx;\n    std::vector&lt;int&gt; data;\n\npublic:\n    void add_item(int value) {\n        \/\/ \u30b9\u30b3\u30fc\u30d7\u30d9\u30fc\u30b9\u306e\u30ed\u30c3\u30af\u7ba1\u7406\n        std::lock_guard&lt;std::mutex&gt; lock(mtx);\n        data.push_back(value);\n        \/\/ \u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u3068\u81ea\u52d5\u7684\u306b\u30a2\u30f3\u30ed\u30c3\u30af\n    }\n};<\/pre>\n\n\n\n<p><strong>std::unique_lock\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class FlexibleResource {\nprivate:\n    std::mutex mtx;\n    std::vector&lt;int&gt; data;\n\npublic:\n    void process_data() {\n        std::unique_lock&lt;std::mutex&gt; lock(mtx);\n        \/\/ \u51e6\u7406\u306e\u4e00\u90e8\u3067\u30ed\u30c3\u30af\u3092\u89e3\u653e\n        if (data.empty()) {\n            lock.unlock();\n            prepare_data();  \/\/ \u30ed\u30c3\u30af\u3092\u4fdd\u6301\u305b\u305a\u306b\u5b9f\u884c\n            lock.lock();     \/\/ \u518d\u5ea6\u30ed\u30c3\u30af\u3092\u53d6\u5f97\n        }\n        \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<p>\u4f7f\u3044\u5206\u3051\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>std::lock_guard<\/code>: \u30b7\u30f3\u30d7\u30eb\u306a\u6392\u4ed6\u5236\u5fa1\u306b\u6700\u9069<\/li>\n\n\n\n<li>\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5c11\u306a\u3044<\/li>\n\n\n\n<li>RAII\u306b\u3088\u308b\u5b89\u5168\u6027\u4fdd\u8a3c<\/li>\n\n\n\n<li>\u67d4\u8edf\u6027\u306f\u9650\u5b9a\u7684<\/li>\n\n\n\n<li><code>std::unique_lock<\/code>: \u9ad8\u5ea6\u306a\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u4f7f\u7528<\/li>\n\n\n\n<li>\u6761\u4ef6\u5909\u6570\u3068\u306e\u4f75\u7528\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30ed\u30c3\u30af\u306e\u9045\u5ef6\u53d6\u5f97\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u9014\u4e2d\u3067\u306e\u30ed\u30c3\u30af\u89e3\u653e\u3068\u518d\u53d6\u5f97\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u56de\u907f\u306e\u305f\u3081\u306e\u67d4\u8edf\u306a\u30ed\u30c3\u30af\u6226\u7565<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">std::mutex\u306e\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u306estd::mutex\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c1\u3064\u3060\u3051\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306f\u3001<code>std::mutex<\/code>\u3092\u4f7f\u7528\u3057\u3066\u5b89\u5168\u306a\u5b9f\u88c5\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Singleton {\nprivate:\n    static std::mutex mtx;\n    static std::unique_ptr&lt;Singleton&gt; instance;\n\n    \/\/ \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    Singleton() = default;\n\npublic:\n    static Singleton&amp; getInstance() {\n        std::lock_guard&lt;std::mutex&gt; lock(mtx);\n        if (!instance) {\n            instance.reset(new Singleton());\n        }\n        return *instance;\n    }\n\n    \/\/ \u30b3\u30d4\u30fc\u7981\u6b62\n    Singleton(const Singleton&amp;) = delete;\n    Singleton&amp; operator=(const Singleton&amp;) = delete;\n};\n\n\/\/ static \u30e1\u30f3\u30d0\u30fc\u306e\u521d\u671f\u5316\nstd::mutex Singleton::mtx;\nstd::unique_ptr&lt;Singleton&gt; Singleton::instance;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u751f\u7523\u8005\u30fb\u6d88\u8cbb\u8005\u30d1\u30bf\u30fc\u30f3\u306e\u5b89\u5168\u306a\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u751f\u7523\u8005\u30fb\u6d88\u8cbb\u8005\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30c7\u30fc\u30bf\u306e\u751f\u6210\u3068\u6d88\u8cbb\u3092\u5225\u3005\u306e\u30b9\u30ec\u30c3\u30c9\u3067\u884c\u3046\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<code>std::mutex<\/code>\u3068<code>std::condition_variable<\/code>\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">template&lt;typename T&gt;\nclass ThreadSafeQueue {\nprivate:\n    std::queue&lt;T&gt; queue;\n    std::mutex mtx;\n    std::condition_variable not_empty;\n    std::condition_variable not_full;\n    size_t capacity;\n\npublic:\n    explicit ThreadSafeQueue(size_t max_size) : capacity(max_size) {}\n\n    void produce(T item) {\n        std::unique_lock&lt;std::mutex&gt; lock(mtx);\n        not_full.wait(lock, [this]() { return queue.size() &lt; capacity; });\n        queue.push(std::move(item));\n        lock.unlock();\n        not_empty.notify_one();\n    }\n\n    T consume() {\n        std::unique_lock&lt;std::mutex&gt; lock(mtx);\n        not_empty.wait(lock, [this]() { return !queue.empty(); });\n        T item = std::move(queue.front());\n        queue.pop();\n        lock.unlock();\n        not_full.notify_one();\n        return item;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u8907\u6570\u30ea\u30bd\u30fc\u30b9\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u56de\u907f\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u8907\u6570\u306e\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u306b<code>std::lock<\/code>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BankAccount {\nprivate:\n    std::mutex mtx;\n    double balance;\n\npublic:\n    void transfer(BankAccount&amp; other, double amount) {\n        \/\/ \u5e38\u306b\u540c\u3058\u9806\u5e8f\u3067\u30ed\u30c3\u30af\u3092\u53d6\u5f97\n        std::lock(mtx, other.mtx);\n        std::lock_guard&lt;std::mutex&gt; lock1(mtx, std::adopt_lock);\n        std::lock_guard&lt;std::mutex&gt; lock2(other.mtx, std::adopt_lock);\n\n        if (balance &gt;= amount) {\n            balance -= amount;\n            other.balance += amount;\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6761\u4ef6\u5909\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u540c\u671f\u5236\u5fa1<\/h3>\n\n\n\n<p><code>std::condition_variable<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u52b9\u7387\u7684\u306a\u901a\u77e5\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class WorkQueue {\nprivate:\n    std::mutex mtx;\n    std::condition_variable cv;\n    bool ready = false;\n    std::queue&lt;std::function&lt;void()&gt;&gt; tasks;\n\npublic:\n    void add_task(std::function&lt;void()&gt; task) {\n        {\n            std::lock_guard&lt;std::mutex&gt; lock(mtx);\n            tasks.push(task);\n            ready = true;\n        }\n        cv.notify_one();  \/\/ \u5f85\u6a5f\u4e2d\u306e\u30ef\u30fc\u30ab\u30fc\u306b\u901a\u77e5\n    }\n\n    void process_tasks() {\n        while (true) {\n            std::unique_lock&lt;std::mutex&gt; lock(mtx);\n            cv.wait(lock, [this]() { return ready; });\n\n            auto task = std::move(tasks.front());\n            tasks.pop();\n            if (tasks.empty()) ready = false;\n            lock.unlock();\n\n            task();  \/\/ \u30bf\u30b9\u30af\u3092\u5b9f\u884c\n        }\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3067\u52b9\u7387\u7684\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u5b9f\u88c5\u6642\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30c3\u30af\u306e\u4fdd\u6301\u6642\u9593\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/li>\n\n\n\n<li>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30ed\u30c3\u30af\u53d6\u5f97\u9806\u5e8f\u306e\u4e00\u8cab\u6027<\/li>\n\n\n\n<li>\u6761\u4ef6\u5909\u6570\u4f7f\u7528\u6642\u306e\u507d\u306e\u899a\u9192\uff08\u30b9\u30d7\u30ea\u30a2\u30b9\u30fb\u30a6\u30a7\u30a4\u30af\u30a2\u30c3\u30d7\uff09\u3078\u306e\u5bfe\u51e6<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">std::mutex\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30ed\u30c3\u30af\u306e\u7c92\u5ea6\u8a2d\u8a08\u306b\u3088\u308b\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u6539\u5584<\/h3>\n\n\n\n<p>\u30ed\u30c3\u30af\u306e\u7c92\u5ea6\u306f\u3001\u4e26\u884c\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5de6\u53f3\u3059\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u9069\u5207\u306a\u7c92\u5ea6\u8a2d\u8a08\u306b\u3088\u308a\u3001\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u7af6\u5408\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u304c\u3089\u3001\u9ad8\u3044\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u7c97\u7c92\u5ea6\u30ed\u30c3\u30af\u306e\u4f8b\nclass CoarseGrainedCache {\nprivate:\n    std::mutex mtx;\n    std::unordered_map&lt;std::string, std::string&gt; cache;\n\npublic:\n    void update_multiple(const std::vector&lt;std::pair&lt;std::string, std::string&gt;&gt;&amp; updates) {\n        std::lock_guard&lt;std::mutex&gt; lock(mtx);  \/\/ \u5168\u64cd\u4f5c\u3092\u5358\u4e00\u306e\u30ed\u30c3\u30af\u3067\u4fdd\u8b77\n        for (const auto&amp; [key, value] : updates) {\n            cache[key] = value;  \/\/ \u5404\u66f4\u65b0\u64cd\u4f5c\u304c\u30ed\u30c3\u30af\u3092\u4fdd\u6301\n        }\n    }\n};\n\n\/\/ \u52b9\u7387\u7684\u306a\u7d30\u7c92\u5ea6\u30ed\u30c3\u30af\u306e\u4f8b\nclass FineGrainedCache {\nprivate:\n    static constexpr size_t SHARD_COUNT = 16;\n    std::array&lt;std::mutex, SHARD_COUNT&gt; shard_mutexes;\n    std::array&lt;std::unordered_map&lt;std::string, std::string&gt;, SHARD_COUNT&gt; shards;\n\n    size_t get_shard_index(const std::string&amp; key) {\n        return std::hash&lt;std::string&gt;{}(key) % SHARD_COUNT;\n    }\n\npublic:\n    void update_multiple(const std::vector&lt;std::pair&lt;std::string, std::string&gt;&gt;&amp; updates) {\n        \/\/ \u66f4\u65b0\u3092\u30b7\u30e3\u30fc\u30c9\u3054\u3068\u306b\u30b0\u30eb\u30fc\u30d7\u5316\n        std::array&lt;std::vector&lt;std::pair&lt;std::string, std::string&gt;&gt;, SHARD_COUNT&gt; grouped_updates;\n        for (const auto&amp; update : updates) {\n            size_t shard_idx = get_shard_index(update.first);\n            grouped_updates[shard_idx].push_back(update);\n        }\n\n        \/\/ \u5404\u30b7\u30e3\u30fc\u30c9\u3092\u500b\u5225\u306b\u30ed\u30c3\u30af\n        for (size_t i = 0; i &lt; SHARD_COUNT; ++i) {\n            if (!grouped_updates[i].empty()) {\n                std::lock_guard&lt;std::mutex&gt; lock(shard_mutexes[i]);\n                for (const auto&amp; [key, value] : grouped_updates[i]) {\n                    shards[i][key] = value;\n                }\n            }\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">try_lock\u3092\u4f7f\u7528\u3057\u305f\u5f85\u6a5f\u6642\u9593\u306e\u524a\u6e1b<\/h3>\n\n\n\n<p><code>try_lock()<\/code>\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ed\u30c3\u30af\u5f85\u3061\u306b\u3088\u308b\u30b9\u30ec\u30c3\u30c9\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u3092\u56de\u907f\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class OptimizedResource {\nprivate:\n    std::mutex mtx;\n    std::vector&lt;int&gt; data;\n\n    \/\/ \u4ee3\u66ff\u30bf\u30b9\u30af\u306e\u5b9f\u884c\n    void perform_alternative_work() {\n        \/\/ \u30ed\u30c3\u30af\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u9593\u306b\u5b9f\u884c\u3059\u308b\u6709\u7528\u306a\u51e6\u7406\n    }\n\npublic:\n    void process_data() {\n        int retry_count = 0;\n        while (retry_count &lt; 3) {  \/\/ \u6700\u59273\u56de\u8a66\u884c\n            if (mtx.try_lock()) {\n                try {\n                    data.push_back(\/* \u51e6\u7406 *\/);\n                    mtx.unlock();\n                    return;\n                } catch (...) {\n                    mtx.unlock();\n                    throw;\n                }\n            }\n            \/\/ \u30ed\u30c3\u30af\u53d6\u5f97\u306b\u5931\u6557\u3057\u305f\u5834\u5408\n            perform_alternative_work();  \/\/ \u4ee3\u66ff\u30bf\u30b9\u30af\u3092\u5b9f\u884c\n            retry_count++;\n            std::this_thread::sleep_for(std::chrono::milliseconds(10 * retry_count));\n        }\n        \/\/ \u901a\u5e38\u306e\u30ed\u30c3\u30af\u53d6\u5f97\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\n        std::lock_guard&lt;std::mutex&gt; lock(mtx);\n        data.push_back(\/* \u51e6\u7406 *\/);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30e1\u30e2\u30ea\u9806\u5e8f\u3068\u30a2\u30c8\u30df\u30c3\u30af\u64cd\u4f5c\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>\u9ad8\u5ea6\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u3067\u306f\u3001<code>std::mutex<\/code>\u3068\u30a2\u30c8\u30df\u30c3\u30af\u64cd\u4f5c\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u304d\u3081\u7d30\u304b\u3044\u5236\u5fa1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class HybridCounter {\nprivate:\n    std::atomic&lt;int&gt; fast_counter{0};  \/\/ \u983b\u7e41\u306a\u66f4\u65b0\u7528\n    std::mutex mtx;\n    std::vector&lt;int&gt; detailed_logs;    \/\/ \u8a73\u7d30\u306a\u30ed\u30b0\u7528\n\npublic:\n    void increment() {\n        \/\/ \u30a2\u30c8\u30df\u30c3\u30af\u30ab\u30a6\u30f3\u30bf\u30fc\u306e\u9ad8\u901f\u306a\u66f4\u65b0\n        fast_counter.fetch_add(1, std::memory_order_relaxed);\n\n        \/\/ \u4e00\u5b9a\u9593\u9694\u3067\u30ed\u30b0\u3092\u8a18\u9332\n        if (fast_counter.load(std::memory_order_relaxed) % 1000 == 0) {\n            std::lock_guard&lt;std::mutex&gt; lock(mtx);\n            detailed_logs.push_back(fast_counter.load(std::memory_order_relaxed));\n        }\n    }\n\n    std::pair&lt;int, std::vector&lt;int&gt;&gt; get_stats() {\n        std::lock_guard&lt;std::mutex&gt; lock(mtx);\n        return {fast_counter.load(std::memory_order_acquire), detailed_logs};\n    }\n};<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30c3\u30af\u7c92\u5ea6\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u30b7\u30e3\u30fc\u30c9\u5316\u3057\u3066\u7af6\u5408\u3092\u6e1b\u5c11<\/li>\n\n\n\n<li>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u6700\u5c0f\u5316<\/li>\n\n\n\n<li>\u8aad\u307f\u53d6\u308a\/\u66f8\u304d\u8fbc\u307f\u306e\u6bd4\u7387\u306b\u5fdc\u3058\u305f\u6226\u7565\u9078\u629e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30c3\u30af\u7af6\u5408\u306e\u8efd\u6e1b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>try_lock\u306b\u3088\u308b\u975e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u51e6\u7406<\/li>\n\n\n\n<li>\u30d0\u30c3\u30af\u30aa\u30d5\u6226\u7565\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u4ee3\u66ff\u30bf\u30b9\u30af\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30c8\u30df\u30c3\u30af\u64cd\u4f5c\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u9806\u5e8f\u306e\u6700\u9069\u306a\u9078\u629e<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u306e\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u6280\u8853\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u6027\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u3001\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306a\u6700\u9069\u5316\u306f\u53ef\u8aad\u6027\u3084\u4fdd\u5b88\u6027\u3092\u640d\u306a\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u52d9\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b\u3068\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u5927\u898f\u6a21\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u8a2d\u8a08\u6226\u7565<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u8a2d\u8a08\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5b9f\u8df5\u7684\u306a\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u968e\u5c64\u7684\u30ed\u30c3\u30af\u6226\u7565\u3092\u7528\u3044\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30d7\u30fc\u30eb\nclass ConnectionPool {\nprivate:\n    struct PoolShard {\n        std::mutex mtx;\n        std::vector&lt;std::unique_ptr&lt;DBConnection&gt;&gt; connections;\n        std::condition_variable cv;\n    };\n\n    static constexpr size_t SHARD_COUNT = 16;\n    std::array&lt;PoolShard, SHARD_COUNT&gt; shards;\n\n    size_t get_shard_index() {\n        static thread_local size_t current_thread_id = \n            std::hash&lt;std::thread::id&gt;{}(std::this_thread::get_id());\n        return current_thread_id % SHARD_COUNT;\n    }\n\npublic:\n    std::unique_ptr&lt;DBConnection&gt; acquire_connection(std::chrono::milliseconds timeout) {\n        auto&amp; shard = shards[get_shard_index()];\n        std::unique_lock&lt;std::mutex&gt; lock(shard.mtx);\n\n        bool success = shard.cv.wait_for(lock, timeout, \n            [&amp;]{ return !shard.connections.empty(); });\n\n        if (!success) {\n            return create_new_connection();  \/\/ \u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\n        }\n\n        auto conn = std::move(shard.connections.back());\n        shard.connections.pop_back();\n        return conn;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306b\u304a\u3051\u308b\u30ea\u30bd\u30fc\u30b9\u5236\u5fa1<\/h3>\n\n\n\n<p>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u5b9f\u88c5\u3067\u306f\u3001\u30bf\u30b9\u30af\u30ad\u30e5\u30fc\u306e\u7ba1\u7406\u3068\u30b9\u30ec\u30c3\u30c9\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306e\u5236\u5fa1\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ThreadPool {\nprivate:\n    struct TaskQueue {\n        std::mutex mtx;\n        std::queue&lt;std::function&lt;void()&gt;&gt; tasks;\n        std::condition_variable cv;\n        bool stopping = false;\n    };\n\n    std::vector&lt;std::thread&gt; workers;\n    std::vector&lt;TaskQueue&gt; queues;\n    std::atomic&lt;size_t&gt; next_queue{0};\n\n    void worker_loop(size_t queue_index) {\n        auto&amp; queue = queues[queue_index];\n        while (true) {\n            std::function&lt;void()&gt; task;\n            {\n                std::unique_lock&lt;std::mutex&gt; lock(queue.mtx);\n                queue.cv.wait(lock, [&amp;]{ \n                    return !queue.tasks.empty() || queue.stopping; \n                });\n\n                if (queue.stopping &amp;&amp; queue.tasks.empty()) {\n                    return;\n                }\n\n                task = std::move(queue.tasks.front());\n                queue.tasks.pop();\n            }\n\n            try {\n                task();\n            } catch (const std::exception&amp; e) {\n                \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u8a18\u9332\n                log_error(e.what());\n            }\n        }\n    }\n\npublic:\n    ThreadPool(size_t thread_count = std::thread::hardware_concurrency())\n        : queues(thread_count) {\n        for (size_t i = 0; i &lt; thread_count; ++i) {\n            workers.emplace_back(&amp;ThreadPool::worker_loop, this, i);\n        }\n    }\n\n    template&lt;class F&gt;\n    void submit(F&amp;&amp; task) {\n        size_t queue_index = (next_queue++) % queues.size();\n        auto&amp; queue = queues[queue_index];\n        {\n            std::lock_guard&lt;std::mutex&gt; lock(queue.mtx);\n            queue.tasks.push(std::forward&lt;F&gt;(task));\n        }\n        queue.cv.notify_one();\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30ed\u30b0\u6a5f\u80fd\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30ed\u30ae\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u9ad8\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u306e\u4e21\u7acb\u304c\u6c42\u3081\u3089\u308c\u308b\u5178\u578b\u7684\u306a\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class HighPerformanceLogger {\nprivate:\n    struct LogBuffer {\n        static constexpr size_t BUFFER_SIZE = 4096;\n        std::array&lt;char, BUFFER_SIZE&gt; data;\n        size_t used = 0;\n        std::mutex mtx;\n    };\n\n    std::vector&lt;LogBuffer&gt; buffers;\n    std::thread flush_thread;\n    std::atomic&lt;bool&gt; should_stop{false};\n    std::condition_variable flush_cv;\n    std::mutex flush_mtx;\n\n    void flush_loop() {\n        while (!should_stop) {\n            std::unique_lock&lt;std::mutex&gt; lock(flush_mtx);\n            flush_cv.wait_for(lock, std::chrono::seconds(1));\n\n            for (auto&amp; buffer : buffers) {\n                std::lock_guard&lt;std::mutex&gt; buf_lock(buffer.mtx);\n                if (buffer.used &gt; 0) {\n                    write_to_file(buffer.data.data(), buffer.used);\n                    buffer.used = 0;\n                }\n            }\n        }\n    }\n\npublic:\n    HighPerformanceLogger(size_t buffer_count = 4)\n        : buffers(buffer_count),\n          flush_thread(&amp;HighPerformanceLogger::flush_loop, this) {}\n\n    void log(const std::string&amp; message) {\n        static thread_local size_t buffer_index = \n            std::hash&lt;std::thread::id&gt;{}(std::this_thread::get_id()) % buffers.size();\n\n        auto&amp; buffer = buffers[buffer_index];\n        std::lock_guard&lt;std::mutex&gt; lock(buffer.mtx);\n\n        if (buffer.used + message.size() &gt; LogBuffer::BUFFER_SIZE) {\n            flush_cv.notify_one();\n            buffer.used = 0;\n        }\n\n        std::copy(message.begin(), message.end(), \n                 buffer.data.begin() + buffer.used);\n        buffer.used += message.size();\n    }\n\n    ~HighPerformanceLogger() {\n        should_stop = true;\n        flush_cv.notify_all();\n        flush_thread.join();\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306e\u8a2d\u8a08\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u8003\u616e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b7\u30e3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u3088\u308b\u7af6\u5408\u306e\u5206\u6563<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30ed\u30fc\u30ab\u30eb\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u968e\u5c64\u7684\u30ed\u30c3\u30af\u6226\u7565\u306e\u63a1\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3068\u30d0\u30c3\u30c1\u51e6\u7406<\/li>\n\n\n\n<li>\u975e\u540c\u671f\u51e6\u7406\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30ed\u30c3\u30af\u7c92\u5ea6\u306e\u9069\u5207\u306a\u8a2d\u8a08<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u904b\u7528\u9762\u3067\u306e\u8003\u616e\u4e8b\u9805<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30d0\u30c3\u30b0\u5bb9\u6613\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30dd\u30a4\u30f3\u30c8\u306e\u8a2d\u7f6e<\/li>\n\n\n\n<li>\u30b0\u30ec\u30fc\u30b9\u30d5\u30eb\u30b7\u30e3\u30c3\u30c8\u30c0\u30a6\u30f3\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30ea\u30ab\u30d0\u30ea\u30fc<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u969c\u5bb3\u306e\u5206\u96e2\u3068\u5f71\u97ff\u7bc4\u56f2\u306e\u5236\u9650<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u6226\u7565<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u5145\u5b9f\u5316<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u3068\u8a2d\u8a08\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u7d4c\u9a13\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u826f\u3044\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-2079","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2079","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2079"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2079\/revisions"}],"predecessor-version":[{"id":2080,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2079\/revisions\/2080"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}