{"id":5463,"date":"2021-08-02T19:32:36","date_gmt":"2021-08-02T11:32:36","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5463"},"modified":"2021-08-02T19:32:36","modified_gmt":"2021-08-02T11:32:36","slug":"c11%e5%a4%9a%e7%ba%bf%e7%a8%8b-%e6%9d%a1%e4%bb%b6%e5%8f%98%e9%87%8fstdcondition_variable","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5463","title":{"rendered":"C++11\u591a\u7ebf\u7a0b-\u6761\u4ef6\u53d8\u91cf(std::condition_variable)"},"content":{"rendered":"<p class=\"_1RuRku\"><a href=\"https:\/\/www.jianshu.com\/p\/a31d4fb5594f\">\u539f\u6587\u5730\u5740<\/a><\/p>\n<p>&nbsp;<\/p>\n<div class=\"rEsl9f\">\n<div class=\"_2mYfmT\"><a class=\"_1qp91i _1OhGeD\" href=\"https:\/\/www.jianshu.com\/u\/88ad4f76eb79\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" class=\"_13D2Eh\" src=\"https:\/\/cdn2.jianshu.io\/assets\/default_avatar\/13-394c31a9cb492fcb39c27422ca7d2815.jpg\" alt=\"\" \/><\/a><\/p>\n<div>\n<div class=\"_3U4Smb\"><span class=\"FxYr8x\"><a class=\"_1OhGeD\" href=\"https:\/\/www.jianshu.com\/u\/88ad4f76eb79\" target=\"_blank\" rel=\"noopener noreferrer\">\u8bb8\u4e86<\/a><\/span><button class=\"_3kba3h _1OyPqC _3Mi9q9 _34692-\" type=\"button\" data-locale=\"zh-CN\">\u5173\u6ce8<\/button><\/div>\n<div class=\"s-dsoj\"><span class=\"_3tCVn5\"><i class=\"anticon\" aria-label=\"ic-diamond\"><\/i>1<\/span><time datetime=\"2018-11-24T15:52:30.000Z\">2018.11.24 23:52:30<\/time>\u5b57\u6570 803\u9605\u8bfb 17,460<\/div>\n<\/div>\n<\/div>\n<\/div>\n<article class=\"_2rhmJa\">\u524d\u9762\u6211\u4eec\u4ecb\u7ecd\u4e86\u7ebf\u7a0b(std::thread)\u548c\u4e92\u65a5\u91cf(std::mutex)\uff0c\u4e92\u65a5\u91cf\u662f\u591a\u7ebf\u7a0b\u95f4\u540c\u65f6\u8bbf\u95ee\u67d0\u4e00\u5171\u4eab\u53d8\u91cf\u65f6\uff0c\u4fdd\u8bc1\u53d8\u91cf\u53ef\u88ab\u5b89\u5168\u8bbf\u95ee\u7684\u624b\u6bb5\u3002\u5728\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\uff0c\u8fd8\u6709\u53e6\u4e00\u79cd\u5341\u5206\u5e38\u89c1\u7684\u884c\u4e3a\uff1a\u7ebf\u7a0b\u540c\u6b65\u3002\u7ebf\u7a0b\u540c\u6b65\u662f\u6307\u7ebf\u7a0b\u95f4\u9700\u8981\u6309\u7167\u9884\u5b9a\u7684\u5148\u540e\u6b21\u5e8f\u987a\u5e8f\u8fdb\u884c\u7684\u884c\u4e3a\u3002C++11\u5bf9\u8fd9\u79cd\u884c\u4e3a\u4e5f\u63d0\u4f9b\u4e86\u6709\u529b\u7684\u652f\u6301\uff0c\u8fd9\u5c31\u662f\u6761\u4ef6\u53d8\u91cf\u3002\u6761\u4ef6\u53d8\u91cf\u4f4d\u4e8e\u5934\u6587\u4ef6condition_variable\u4e0b\u3002\u672c\u7ae0\u6211\u4eec\u5c06\u7b80\u8981\u4ecb\u7ecd\u4e00\u4e0b\u8be5\u7c7b\uff0c\u5728\u6587\u7ae0\u7684\u6700\u540e\u6211\u4eec\u4f1a\u7efc\u5408\u8fd0\u7528std::mutex\u548cstd::condition_variable\uff0c\u5b9e\u73b0\u4e00\u4e2achan\u7c7b\uff0c\u8be5\u7c7b\u53ef\u5728\u591a\u7ebf\u7a0b\u95f4\u5b89\u5168\u7684\u901a\u4fe1\uff0c\u5177\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<h1>1. std::condition_variable<\/h1>\n<p>\u6761\u4ef6\u53d8\u91cf\u63d0\u4f9b\u4e86\u4e24\u7c7b\u64cd\u4f5c\uff1await\u548cnotify\u3002\u8fd9\u4e24\u7c7b\u64cd\u4f5c\u6784\u6210\u4e86\u591a\u7ebf\u7a0b\u540c\u6b65\u7684\u57fa\u7840\u3002<\/p>\n<h2>1.1 wait<\/h2>\n<p>wait\u662f\u7ebf\u7a0b\u7684\u7b49\u5f85\u52a8\u4f5c\uff0c\u76f4\u5230\u5176\u5b83\u7ebf\u7a0b\u5c06\u5176\u5524\u9192\u540e\uff0c\u624d\u4f1a\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u3002\u4e0b\u9762\u901a\u8fc7\u4f2a\u4ee3\u7801\u6765\u8bf4\u660e\u5176\u7528\u6cd5\uff1a<\/p>\n<div class=\"_2Uzcx_\"><button class=\"VJbwyy\" type=\"button\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><i class=\"anticon anticon-copy\" aria-label=\"icon: copy\"><\/i><\/button><\/p>\n<pre class=\"line-numbers  language-c\"><code class=\"c++ ++  language-c\">std<span class=\"token operator\">::<\/span>mutex mutex<span class=\"token punctuation\">;<\/span>\r\nstd<span class=\"token operator\">::<\/span>condition_variable cv<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token comment\">\/\/ \u6761\u4ef6\u53d8\u91cf\u4e0e\u4e34\u754c\u533a\u6709\u5173\uff0c\u7528\u6765\u83b7\u53d6\u548c\u91ca\u653e\u4e00\u4e2a\u9501\uff0c\u56e0\u6b64\u901a\u5e38\u4f1a\u548cmutex\u8054\u7528\u3002<\/span>\r\nstd<span class=\"token operator\">::<\/span>unique_lock <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>mutex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token comment\">\/\/ \u6b64\u5904\u4f1a\u91ca\u653elock\uff0c\u7136\u540e\u5728cv\u4e0a\u7b49\u5f85\uff0c\u76f4\u5230\u5176\u5b83\u7ebf\u7a0b\u901a\u8fc7cv.notify_xxx\u6765\u5524\u9192\u5f53\u524d\u7ebf\u7a0b\uff0ccv\u88ab\u5524\u9192\u540e\u4f1a\u518d\u6b21\u5bf9lock\u8fdb\u884c\u4e0a\u9501\uff0c\u7136\u540ewait\u51fd\u6570\u624d\u4f1a\u8fd4\u56de\u3002<\/span>\r\n<span class=\"token comment\">\/\/ wait\u8fd4\u56de\u540e\u53ef\u4ee5\u5b89\u5168\u7684\u4f7f\u7528mutex\u4fdd\u62a4\u7684\u4e34\u754c\u533a\u5185\u7684\u6570\u636e\u3002\u6b64\u65f6mutex\u4ecd\u4e3a\u4e0a\u9501\u72b6\u6001<\/span>\r\ncv<span class=\"token punctuation\">.<\/span><span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u4e00\u70b9\u662f, wait\u6709\u65f6\u4f1a\u5728\u6ca1\u6709\u4efb\u4f55\u7ebf\u7a0b\u8c03\u7528notify\u7684\u60c5\u51b5\u4e0b\u8fd4\u56de\uff0c\u8fd9\u79cd\u60c5\u51b5\u5c31\u662f\u6709\u540d\u7684<a href=\"https:\/\/docs.microsoft.com\/zh-cn\/windows\/desktop\/api\/synchapi\/nf-synchapi-sleepconditionvariablecs\" target=\"_blank\" rel=\"nofollow noopener\"><strong>spurious wakeup<\/strong><\/a>\u3002\u56e0\u6b64\u5f53wait\u8fd4\u56de\u65f6\uff0c\u4f60\u9700\u8981\u518d\u6b21\u68c0\u67e5wait\u7684\u524d\u7f6e\u6761\u4ef6\u662f\u5426\u6ee1\u8db3\uff0c\u5982\u679c\u4e0d\u6ee1\u8db3\u5219\u9700\u8981\u518d\u6b21wait\u3002wait\u63d0\u4f9b\u4e86\u91cd\u8f7d\u7684\u7248\u672c\uff0c\u7528\u4e8e\u63d0\u4f9b\u524d\u7f6e\u68c0\u67e5\u3002<\/p>\n<div class=\"_2Uzcx_\"><button class=\"VJbwyy\" type=\"button\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><i class=\"anticon anticon-copy\" aria-label=\"icon: copy\"><\/i><\/button><\/p>\n<pre class=\"line-numbers  language-c\"><code class=\"c++ ++  language-c\">template <span class=\"token operator\">&lt;<\/span>typename Predicate<span class=\"token operator\">&gt;<\/span>\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>unique_lock<span class=\"token operator\">&lt;<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">&amp;<\/span>lock<span class=\"token punctuation\">,<\/span> Predicate pred<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">pred<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u9664wait\u5916, \u6761\u4ef6\u53d8\u91cf\u8fd8\u63d0\u4f9b\u4e86wait_for\u548cwait_until\uff0c\u8fd9\u4e24\u4e2a\u540d\u79f0\u662f\u4e0d\u662f\u770b\u7740\u6709\u70b9\u513f\u773c\u719f\uff0cstd::mutex\u4e5f\u63d0\u4f9b\u4e86_for\u548c_until\u64cd\u4f5c\u3002\u5728C++11\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\uff0c\u9700\u8981\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u7684\u64cd\u4f5c\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u90fd\u4f1a\u6709xxx_for\u548cxxx_until\u7248\u672c\u3002\u524d\u8005\u7528\u4e8e\u7b49\u5f85\u6307\u5b9a\u65f6\u957f\uff0c\u540e\u8005\u7528\u4e8e\u7b49\u5f85\u5230\u6307\u5b9a\u7684\u65f6\u95f4\u3002<\/p>\n<h2>1.2 notify<\/h2>\n<p>\u4e86\u89e3\u4e86wait\uff0cnotify\u5c31\u7b80\u5355\u591a\u4e86\uff1a\u5524\u9192wait\u5728\u8be5\u6761\u4ef6\u53d8\u91cf\u4e0a\u7684\u7ebf\u7a0b\u3002notify\u6709\u4e24\u4e2a\u7248\u672c\uff1anotify_one\u548cnotify_all\u3002<\/p>\n<ul>\n<li>notify_one \u5524\u9192\u7b49\u5f85\u7684\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u6ce8\u610f\u53ea\u5524\u9192\u4e00\u4e2a\u3002<\/li>\n<li>notify_all \u5524\u9192\u6240\u6709\u7b49\u5f85\u7684\u7ebf\u7a0b\u3002\u4f7f\u7528\u8be5\u51fd\u6570\u65f6\u5e94\u907f\u514d\u51fa\u73b0<a href=\"https:\/\/blog.csdn.net\/lyztyycode\/article\/details\/78648798?locationNum=6&amp;fps=1\" target=\"_blank\" rel=\"nofollow noopener\">\u60ca\u7fa4\u6548\u5e94<\/a>\u3002<\/li>\n<\/ul>\n<p>\u5176\u4f7f\u7528\u65b9\u5f0f\u89c1\u4e0b\u4f8b\uff1a<\/p>\n<div class=\"_2Uzcx_\"><button class=\"VJbwyy\" type=\"button\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><i class=\"anticon anticon-copy\" aria-label=\"icon: copy\"><\/i><\/button><\/p>\n<pre class=\"line-numbers  language-c\"><code class=\"c++ ++  language-c\">std<span class=\"token operator\">::<\/span>mutex mutex<span class=\"token punctuation\">;<\/span>\r\nstd<span class=\"token operator\">::<\/span>condition_variable cv<span class=\"token punctuation\">;<\/span>\r\n\r\nstd<span class=\"token operator\">::<\/span>unique_lock <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>mutex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token comment\">\/\/ \u6240\u6709\u7b49\u5f85\u5728cv\u53d8\u91cf\u4e0a\u7684\u7ebf\u7a0b\u90fd\u4f1a\u88ab\u5524\u9192\u3002\u4f46\u76f4\u5230lock\u91ca\u653e\u4e86mutex\uff0c\u88ab\u5524\u9192\u7684\u7ebf\u7a0b\u624d\u4f1a\u4ecewait\u8fd4\u56de\u3002<\/span>\r\ncv<span class=\"token punctuation\">.<\/span><span class=\"token function\">notify_all<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<\/div>\n<h1>2. \u7ebf\u7a0b\u95f4\u901a\u4fe1 &#8211; chan\u7684\u5b9e\u73b0<\/h1>\n<p>\u6709\u4e86\u4e0a\u9762\u7684\u57fa\u7840\u6211\u4eec\u5c31\u53ef\u4ee5\u8bbe\u8ba1\u6211\u4eec\u7684\u7ebf\u7a0b\u95f4\u901a\u8baf\u5de5\u5177&#8221;chan&#8221;\u4e86\u3002\u6211\u4eec\u7684\u8bbe\u8ba1\u76ee\u6807\uff1a<\/p>\n<ul>\n<li>\u5728\u7ebf\u7a0b\u95f4\u5b89\u5168\u7684\u4f20\u9012\u6570\u636e\u3002golang\u793e\u533a\u6709\u4e00\u53e5\u7ecf\u5178\u7684\u8bdd\uff1a\u4e0d\u8981\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6765\u901a\u4fe1\uff0c\u8981\u901a\u8fc7\u901a\u4fe1\u6765\u5171\u4eab\u5185\u5b58\u3002<\/li>\n<li>\u6d88\u9664\u7ebf\u7a0b\u7ebf\u7a0b\u540c\u6b65\u5e26\u6765\u7684\u590d\u6742\u6027\u3002<\/li>\n<\/ul>\n<p>\u6211\u4eec\u5148\u6765\u770b\u4e00\u4e0bchan\u7684\u5b9e\u9645\u4f7f\u7528\u6548\u679c, \u751f\u4ea7\u8005-\u6d88\u8d39\u8005\uff08\u4e00\u4e2a\u751f\u4ea7\u8005\uff0c\u591a\u4e2a\u6d88\u8d39\u8005\uff09<\/p>\n<div class=\"_2Uzcx_\"><button class=\"VJbwyy\" type=\"button\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><i class=\"anticon anticon-copy\" aria-label=\"icon: copy\"><\/i><\/button><\/p>\n<pre class=\"line-numbers  language-c\"><code class=\"c++ ++  language-c\"><span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;thread&gt;<\/span><\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">\"chan.h\"<\/span>  <\/span><span class=\"token comment\">\/\/ chan\u7684\u5934\u6587\u4ef6<\/span>\r\n\r\nusing namespace std<span class=\"token operator\">::<\/span>chrono<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token comment\">\/\/ \u6d88\u8d39\u6570\u636e <\/span>\r\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">consume<\/span><span class=\"token punctuation\">(<\/span>chan<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> ch<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> thread_id<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>ch <span class=\"token operator\">&gt;&gt;<\/span> n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"[%d] %d\\n\"<\/span><span class=\"token punctuation\">,<\/span> thread_id<span class=\"token punctuation\">,<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        std<span class=\"token operator\">::<\/span>this_thread<span class=\"token operator\">::<\/span><span class=\"token function\">sleep_for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">milliseconds<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    chan<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">chInt<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    \r\n    <span class=\"token comment\">\/\/ \u6d88\u8d39\u8005<\/span>\r\n    std<span class=\"token operator\">::<\/span>thread consumers<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        consumers<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">thread<\/span><span class=\"token punctuation\">(<\/span>consume<span class=\"token punctuation\">,<\/span> chInt<span class=\"token punctuation\">,<\/span> i<span class=\"token operator\">+<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u751f\u4ea7\u6570\u636e <\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        chInt <span class=\"token operator\">&lt;&lt;<\/span> i<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    chInt<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u6570\u636e\u751f\u4ea7\u5b8c\u6bd5<\/span>\r\n\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>thread <span class=\"token operator\">&amp;<\/span>thr<span class=\"token operator\">:<\/span> consumers<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        thr<span class=\"token punctuation\">.<\/span><span class=\"token function\">join<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<\/div>\n<h1>\u9644: \u6e90\u7801(\u53ef\u5728<a href=\"https:\/\/github.com\/hcj116\/cpp11thread\/blob\/master\/code\/chan.simple.h\" target=\"_blank\" rel=\"nofollow noopener\">github<\/a>\u4e0a\u4e0b\u8f7d\u5230)<\/h1>\n<p>\u4e0b\u9762\u9644\u4e0achan.simple.h\u7684\u5b9e\u73b0\uff0c\u662fchan\u7684\u8f83\u4e3a\u7b80\u5355\u7684\u5b9e\u73b0\uff0c\u5b8c\u6574\u5b9e\u73b0\u8bf7\u53bb<a href=\"https:\/\/github.com\/hcj116\/cpp11thread\/blob\/master\/code\/chan.h\" target=\"_blank\" rel=\"nofollow noopener\">github<\/a>\u4e0b\u8f7d\u3002\u8be5\u4ee3\u7801\u5728g++\u548cvc 2015\u4e0b\u5747\u7f16\u8bd1\u901a\u8fc7\uff0c\u5176\u5b83\u5e73\u53f0\u672a\u9a8c\u8bc1\u3002<\/p>\n<div class=\"_2Uzcx_\"><button class=\"VJbwyy\" type=\"button\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><i class=\"anticon anticon-copy\" aria-label=\"icon: copy\"><\/i><\/button><\/p>\n<pre class=\"line-numbers  language-c\"><code class=\"c++ ++  language-c\"><span class=\"token comment\">\/\/ chan.simple.h<\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">pragma<\/span> once<\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;condition_variable&gt;<\/span>  <\/span><span class=\"token comment\">\/\/ std::condition_variable<\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;list&gt;<\/span>                <\/span><span class=\"token comment\">\/\/ std::list<\/span>\r\n<span class=\"token macro property\">#<span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;mutex&gt;<\/span>               <\/span><span class=\"token comment\">\/\/ std::mutex<\/span>\r\n\r\ntemplate <span class=\"token operator\">&lt;<\/span>typename T<span class=\"token operator\">&gt;<\/span>\r\nclass chan <span class=\"token punctuation\">{<\/span>\r\n    class queue_t <span class=\"token punctuation\">{<\/span>\r\n        mutable std<span class=\"token operator\">::<\/span>mutex mutex_<span class=\"token punctuation\">;<\/span>\r\n        std<span class=\"token operator\">::<\/span>condition_variable cv_<span class=\"token punctuation\">;<\/span>\r\n        std<span class=\"token operator\">::<\/span>list<span class=\"token operator\">&lt;<\/span>T<span class=\"token operator\">&gt;<\/span> data_<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">const<\/span> size_t capacity_<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ data_\u5bb9\u91cf<\/span>\r\n        <span class=\"token keyword\">const<\/span> bool enable_overflow_<span class=\"token punctuation\">;<\/span>\r\n        bool closed_ <span class=\"token operator\">=<\/span> false<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u961f\u5217\u662f\u5426\u5df2\u5173\u95ed<\/span>\r\n        size_t pop_count_ <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8ba1\u6570\uff0c\u7d2f\u8ba1pop\u7684\u6570\u91cf<\/span>\r\n    public<span class=\"token operator\">:<\/span>\r\n        <span class=\"token function\">queue_t<\/span><span class=\"token punctuation\">(<\/span>size_t capacity<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span>\r\n            <span class=\"token function\">capacity_<\/span><span class=\"token punctuation\">(<\/span>capacity <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">?<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> capacity<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>\r\n            <span class=\"token function\">enable_overflow_<\/span><span class=\"token punctuation\">(<\/span>capacity <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        bool <span class=\"token function\">is_empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">return<\/span> data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        size_t <span class=\"token function\">free_count<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token comment\">\/\/ capacity_\u4e3a0\u65f6\uff0c\u5141\u8bb8\u653e\u5165\u4e00\u4e2a\uff0c\u4f46_queue\u4f1a\u5904\u4e8eoverflow\u72b6\u6001<\/span>\r\n            <span class=\"token keyword\">return<\/span> capacity_ <span class=\"token operator\">-<\/span> data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        bool <span class=\"token function\">is_overflow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">return<\/span> enable_overflow_ <span class=\"token operator\">&amp;&amp;<\/span> data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;=<\/span> capacity_<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        bool <span class=\"token function\">is_closed<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>\r\n            std<span class=\"token operator\">::<\/span>unique_lock<span class=\"token operator\">&lt;<\/span>std<span class=\"token operator\">::<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span>mutex_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">return<\/span> this<span class=\"token operator\">-&gt;<\/span>closed_<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        <span class=\"token comment\">\/\/ close\u4ee5\u540e\u7684\u5165chan\u64cd\u4f5c\u4f1a\u8fd4\u56defalse, \u800c\u51fachan\u5219\u5728\u961f\u5217\u4e3a\u7a7a\u540e\u624d\u8fd4\u56defalse<\/span>\r\n        <span class=\"token keyword\">void<\/span> <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            std<span class=\"token operator\">::<\/span>unique_lock<span class=\"token operator\">&lt;<\/span>std<span class=\"token operator\">::<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span>mutex_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            this<span class=\"token operator\">-&gt;<\/span>closed_ <span class=\"token operator\">=<\/span> true<span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">is_overflow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token comment\">\/\/ \u6d88\u9664\u6ea2\u51fa<\/span>\r\n                this<span class=\"token operator\">-&gt;<\/span>data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">pop_back<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n            this<span class=\"token operator\">-&gt;<\/span>cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">notify_all<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        template <span class=\"token operator\">&lt;<\/span>typename TR<span class=\"token operator\">&gt;<\/span>\r\n        bool <span class=\"token function\">pop<\/span><span class=\"token punctuation\">(<\/span>TR <span class=\"token operator\">&amp;<\/span>data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            std<span class=\"token operator\">::<\/span>unique_lock<span class=\"token operator\">&lt;<\/span>std<span class=\"token operator\">::<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span>mutex_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            this<span class=\"token operator\">-&gt;<\/span>cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token operator\">!<\/span><span class=\"token function\">is_empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span> closed_<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">is_empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5df2\u5173\u95ed<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n            data <span class=\"token operator\">=<\/span> this<span class=\"token operator\">-&gt;<\/span>data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">front<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            this<span class=\"token operator\">-&gt;<\/span>data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">pop_front<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            this<span class=\"token operator\">-&gt;<\/span>pop_count_<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>this<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">free_count<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token comment\">\/\/ \u8bf4\u660e\u4ee5\u524d\u662ffull\u6216\u6ea2\u51fa\u72b6\u6001<\/span>\r\n                this<span class=\"token operator\">-&gt;<\/span>cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">notify_all<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n            <span class=\"token keyword\">return<\/span> true<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        template <span class=\"token operator\">&lt;<\/span>typename TR<span class=\"token operator\">&gt;<\/span>\r\n        bool <span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>TR <span class=\"token operator\">&amp;&amp;<\/span>data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            std<span class=\"token operator\">::<\/span>unique_lock<span class=\"token operator\">&lt;<\/span>std<span class=\"token operator\">::<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>mutex_<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span>this<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token function\">free_count<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">||<\/span> closed_<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>closed_<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n            data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>forward<span class=\"token operator\">&lt;<\/span>TR<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>data_<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">notify_all<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n            <span class=\"token comment\">\/\/ \u5f53queue\u6ea2\u51fa,\u9700\u7b49\u5f85queue\u56de\u590d\u6b63\u5e38<\/span>\r\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">is_overflow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">const<\/span> size_t old <span class=\"token operator\">=<\/span> this<span class=\"token operator\">-&gt;<\/span>pop_count_<span class=\"token punctuation\">;<\/span>\r\n                cv_<span class=\"token punctuation\">.<\/span><span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> old <span class=\"token operator\">!=<\/span> pop_count_ <span class=\"token operator\">||<\/span> closed_<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n            <span class=\"token keyword\">return<\/span> <span class=\"token operator\">!<\/span>this<span class=\"token operator\">-&gt;<\/span>closed_<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n    std<span class=\"token operator\">::<\/span>shared_ptr<span class=\"token operator\">&lt;<\/span>queue_t<span class=\"token operator\">&gt;<\/span> queue_<span class=\"token punctuation\">;<\/span>\r\n\r\npublic<span class=\"token operator\">:<\/span>\r\n    explicit <span class=\"token function\">chan<\/span><span class=\"token punctuation\">(<\/span>size_t capacity <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        queue_ <span class=\"token operator\">=<\/span> std<span class=\"token operator\">::<\/span>make_shared<span class=\"token operator\">&lt;<\/span>queue_t<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span>capacity<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u652f\u6301\u62f7\u8d1d<\/span>\r\n    <span class=\"token function\">chan<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> chan <span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span>\r\n    chan <span class=\"token operator\">&amp;<\/span>operator<span class=\"token operator\">=<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> chan <span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token comment\">\/\/ \u652f\u6301move<\/span>\r\n    <span class=\"token function\">chan<\/span><span class=\"token punctuation\">(<\/span>chan <span class=\"token operator\">&amp;&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span>\r\n    chan <span class=\"token operator\">&amp;<\/span>operator<span class=\"token operator\">=<\/span><span class=\"token punctuation\">(<\/span>chan <span class=\"token operator\">&amp;&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u5165chan\uff0c\u652f\u6301move\u8bed\u4e49<\/span>\r\n    template <span class=\"token operator\">&lt;<\/span>typename TR<span class=\"token operator\">&gt;<\/span>\r\n    bool operator<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token punctuation\">(<\/span>TR <span class=\"token operator\">&amp;&amp;<\/span>data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> queue_<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>forward<span class=\"token operator\">&lt;<\/span>TR<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ \u51fachan(\u652f\u6301\u517c\u5bb9\u7c7b\u578b\u7684\u51fachan)<\/span>\r\n    template <span class=\"token operator\">&lt;<\/span>typename TR<span class=\"token operator\">&gt;<\/span>\r\n    bool operator<span class=\"token operator\">&gt;&gt;<\/span><span class=\"token punctuation\">(<\/span>TR <span class=\"token operator\">&amp;<\/span>data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> queue_<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">pop<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token comment\">\/\/ close\u4ee5\u540e\u7684\u5165chan\u64cd\u4f5c\u8fd4\u56defalse, \u800c\u51fachan\u5219\u5728\u961f\u5217\u4e3a\u7a7a\u540e\u624d\u8fd4\u56defalse<\/span>\r\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        queue_<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    bool <span class=\"token function\">is_closed<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> queue_<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">is_closed<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<\/div>\n<table>\n<thead>\n<tr>\n<th><a href=\"https:\/\/www.jianshu.com\/p\/8bd389d4ed83\" target=\"_blank\" rel=\"nofollow noopener\">\u4e0a\u4e00\u7bc7<br \/>\nC++11\u591a\u7ebf\u7a0b-mutex(2)<\/a><\/th>\n<th><a href=\"https:\/\/www.jianshu.com\/p\/e5a3498ba930\" target=\"_blank\" rel=\"nofollow noopener\">\u76ee\u5f55<\/a><\/th>\n<th><a href=\"https:\/\/www.jianshu.com\/p\/7945428c220e\" target=\"_blank\" rel=\"nofollow noopener\">\u4e0b\u4e00\u7bc7<br \/>\nC++11\u591a\u7ebf\u7a0b-promise<\/a><\/th>\n<\/tr>\n<\/thead>\n<\/table>\n<\/article>\n<div><\/div>\n<div class=\"_1kCBjS\">\n<div class=\"_18vaTa\">\n<div class=\"_3BUZPB\">\n<div class=\"_2Bo4Th\" tabindex=\"-1\" role=\"button\" aria-label=\"\u7ed9\u6587\u7ae0\u70b9\u8d5e\"><\/div>\n<p><span class=\"_1LOh_5\" tabindex=\"-1\" role=\"button\" aria-label=\"\u67e5\u770b\u70b9\u8d5e\u5217\u8868\">15\u4eba\u70b9\u8d5e<i class=\"anticon anticon-right\" aria-label=\"icon: right\"><\/i><\/span><\/div>\n<div class=\"_3BUZPB\">\n<div class=\"_2Bo4Th\" tabindex=\"-1\" role=\"button\"><\/div>\n<\/div>\n<\/div>\n<div class=\"_18vaTa\"><a class=\"_3BUZPB _1x1ok9 _1OhGeD\" href=\"https:\/\/www.jianshu.com\/nb\/31707051\" target=\"_blank\" rel=\"noopener noreferrer\"><i class=\"anticon\" aria-label=\"ic-notebook\"><\/i>C++<\/a><\/p>\n<div class=\"_3BUZPB ant-dropdown-trigger\">\n<div class=\"_2Bo4Th\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u6587\u5730\u5740 &nbsp; \u8bb8\u4e86\u5173\u6ce8 120<\/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":[119],"class_list":["post-5463","post","type-post","status-publish","format-standard","hentry","tag-03-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5463","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=5463"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5463\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=5463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=5463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=5463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}