{"id":634,"date":"2013-01-10T11:29:01","date_gmt":"2013-01-10T11:29:01","guid":{"rendered":"http:\/\/sysdev.me\/?p=634"},"modified":"2013-04-07T14:56:28","modified_gmt":"2013-04-07T14:56:28","slug":"cpp-monitor-pattern","status":"publish","type":"post","link":"https:\/\/sysdev.me\/old\/cpp-monitor-pattern\/","title":{"rendered":"\u041c\u043e\u043d\u0438\u0442\u043e\u0440 \u043e\u0442 \u0413\u0435\u0440\u0431\u0430 \u0421\u0430\u0442\u0442\u0435\u0440\u0430"},"content":{"rendered":"

\u0412 \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u0448\u0435\u0434\u0448\u0435\u043c \u0432\u044b\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0438 \u0413\u0435\u0440\u0431\u0430 \u0421\u0430\u0442\u0442\u0435\u0440\u0430 \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u043e\u043c \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438<\/a> \u043e\u043d \u043f\u0440\u0438\u0432\u0435\u043b \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u0430 \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439. \u0421\u0430\u043c \u041c\u0430\u0439\u0435\u0440\u0441 \u043e\u043a\u0440\u0435\u0441\u0442\u0438\u043b \u0434\u0435\u0442\u0438\u0449\u0435 “\u043c\u043e\u043d\u0438\u0442\u043e\u0440\u043e\u043c”, \u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0430\u043c\u0438 \u0438\u0437 \u043c\u0438\u0440\u0430 Java \u0438 C#, \u0445\u043e\u0442\u044f \u043d\u0430 \u043c\u043e\u0439 \u0432\u0437\u0433\u043b\u044f\u0434, \u0441\u0445\u043e\u0434\u0441\u0442\u0432\u0430 \u043c\u0435\u0436\u0434\u0443 \u043d\u0438\u043c\u0438 \u043d\u0435 \u0442\u0430\u043a \u0443\u0436 \u0438 \u043c\u043d\u043e\u0433\u043e. \u0421\u0443\u0442\u044c \u0437\u0430\u0434\u0443\u043c\u043a\u0438 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0431\u044b \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 \u043a\u0430\u043a\u0438\u043c-\u043b\u0438\u0431\u043e \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043d\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0441\u0442\u044c \u043d\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u043e\u0434\u043d\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438, \u043d\u043e \u0438 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 “\u0442\u0440\u0430\u043d\u0441\u0437\u0430\u043a\u0446\u0438\u0438”. <\/p> \n

string s =<\/span> "Start\\n<\/span>"<\/span>;<\/span>
\nvector<<\/span>future<<\/span>void<\/span>>><\/span> v;<\/span>
\n
\nfor<\/span>(<\/span>int<\/span> i=<\/span>0<\/span>;<\/span> i<<\/span>5<\/span>;<\/span> ++<\/span>i)<\/span>
\n{<\/span>
\n    v.push_back<\/span>(<\/span>async(<\/span>[<\/span>&<\/span>,i]<\/span>{<\/span>
\n        {<\/span>
\n            \/\/ \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u0430\u0442\u043e\u043c\u0430\u0440\u043d\u043e.<\/span>
\n            s +<\/span>=<\/span> to_string(<\/span>i)<\/span> +<\/span> " "<\/span> +<\/span> to_string(<\/span>i)<\/span>;<\/span>
\n            s +<\/span>=<\/span> "\\n<\/span>"<\/span>;<\/span>
\n        }<\/span>
\n        {<\/span>
\n            \/\/ \u0442\u0430\u043a \u0436\u0435 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u0430\u0442\u043e\u043c\u0430\u0440\u043d\u043e.<\/span>
\n            cout<\/span> <<<\/span> s;<\/span>
\n        }<\/span>
\n    }<\/span>)<\/span>)<\/span>;<\/span>
\n}<\/span><\/div><\/div>\n

\u0412 \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u0435, \u0432 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u043e\u043c \u0432\u044b\u0448\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 \u0432\u043f\u043e\u043b\u043d\u0435 \u043c\u043e\u0436\u043d\u043e \u0432\u043e\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u0435\u0439 mutex + lock_guard, \u043d\u043e \u0442\u0430\u043a \u043d\u0435 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e, \u043d\u0435 \u043a\u0440\u0430\u0441\u0438\u0432\u043e, \u0434\u0430 \u0438 \u043e \u0447\u0435\u043c \u0431\u044b\u043b\u043e \u0431\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0438 \u043f\u043e\u043b\u0443\u0442\u043e\u0440\u0430 \u0447\u0430\u0441\u043e\u0432? <\/span>
\n\u0420\u0435\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u044d\u043b\u0435\u0433\u0430\u043d\u0442\u043d\u043e\u0435: <\/p> \n

template<\/span><<\/span>typename<\/span> T><\/span>
\nclass<\/span> Monitor
\n{<\/span>
\npublic<\/span>:<\/span>
\n    mutable<\/span> T t_;<\/span>
\n    mutable<\/span> mutex m_;<\/span>
\npublic<\/span>:<\/span>
\n    Monitor(<\/span>T t =<\/span> T{<\/span>}<\/span>)<\/span> :<\/span> t_(<\/span>t)<\/span> {<\/span>}<\/span>
\n
\n    template<\/span><<\/span>typename<\/span> F><\/span>
\n    auto<\/span> operator(<\/span>)<\/span>(<\/span>F f)<\/span> const<\/span> -<\/span>><\/span> decltype<\/span>(<\/span>f(<\/span>t_)<\/span>)<\/span>
\n    {<\/span>
\n        lock_guard<<\/span>mutex><\/span>_{<\/span>m_}<\/span>;<\/span>
\n        return<\/span> f(<\/span>t_)<\/span>;<\/span>
\n    }<\/span>
\n}<\/span>;<\/span><\/div><\/div>\n

\u0427\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u043f\u0440\u043e\u0441\u0442\u0438\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u044c \u0434\u043e \u0441\u043b\u0435\u0434\u0443\u0449\u0435\u0439: <\/p> \n

string s =<\/span> "Start\\n<\/span>"<\/span>;<\/span>
\nMonitor<<\/span>string&<\/span>><\/span> m{<\/span>s}<\/span>;<\/span>
\nvector<<\/span>future<<\/span>void<\/span>>><\/span> v;<\/span>
\n
\nfor<\/span>(<\/span>int<\/span> i=<\/span>0<\/span>;<\/span> i<<\/span>5<\/span>;<\/span> ++<\/span>i)<\/span>
\n{<\/span>
\n    v.push_back<\/span>(<\/span>async(<\/span>[<\/span>&<\/span>,i]<\/span>{<\/span>
\n        m(<\/span>[<\/span>=<\/span>]<\/span>(<\/span>string &<\/span>s)<\/span> {<\/span>
\n            s +<\/span>=<\/span> to_string(<\/span>i)<\/span> +<\/span> " "<\/span> +<\/span> to_string(<\/span>i)<\/span>;<\/span>
\n            s +<\/span>=<\/span> "\\n<\/span>"<\/span>;<\/span>
\n        }<\/span>)<\/span>;<\/span>
\n        m(<\/span>[<\/span>]<\/span>(<\/span>string &<\/span>s)<\/span>{<\/span>
\n            cout<\/span> <<<\/span> s;<\/span>
\n        }<\/span>)<\/span>;<\/span>
\n    }<\/span>)<\/span>)<\/span>;<\/span>
\n}<\/span><\/div><\/div>\n

\u041d\u0435 \u043f\u0440\u0430\u0432\u0434\u0430 \u043b\u0438 \u044d\u043b\u0435\u0433\u0430\u043d\u0442\u043d\u043e\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435? \u0420\u0430\u0437\u0432\u0435 \u0447\u0442\u043e \u0435\u0433\u043e \u043e\u0431\u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u044e mutable + const \u0432 operator() \u0441\u043c\u0443\u0449\u0430\u044e\u0442. <\/p> \n","protected":false},"excerpt":{"rendered":"

\u0412 \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u0448\u0435\u0434\u0448\u0435\u043c \u0432\u044b\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0438 \u0413\u0435\u0440\u0431\u0430 \u0421\u0430\u0442\u0442\u0435\u0440\u0430 \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u043e\u043c \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438 \u043e\u043d \u043f\u0440\u0438\u0432\u0435\u043b \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u0430 \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439. \u0421\u0430\u043c \u041c\u0430\u0439\u0435\u0440\u0441 \u043e\u043a\u0440\u0435\u0441\u0442\u0438\u043b \u0434\u0435\u0442\u0438\u0449\u0435 “\u043c\u043e\u043d\u0438\u0442\u043e\u0440\u043e\u043c”, \u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0430\u043c\u0438 \u0438\u0437 \u043c\u0438\u0440\u0430 Java \u0438 C#, \u0445\u043e\u0442\u044f \u043d\u0430 \u043c\u043e\u0439 \u0432\u0437\u0433\u043b\u044f\u0434, \u0441\u0445\u043e\u0434\u0441\u0442\u0432\u0430 \u043c\u0435\u0436\u0434\u0443 \u043d\u0438\u043c\u0438 \u043d\u0435 \u0442\u0430\u043a \u0443\u0436 \u0438 \u043c\u043d\u043e\u0433\u043e. \u0421\u0443\u0442\u044c \u0437\u0430\u0434\u0443\u043c\u043a\u0438 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0431\u044b \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 \u043a\u0430\u043a\u0438\u043c-\u043b\u0438\u0431\u043e \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c,… Continue reading →<\/span><\/a> <\/p> \n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[47,44],"tags":[9,33],"class_list":["post-634","post","type-post","status-publish","format-standard","hentry","category-books","category-dev","tag-cc","tag-architecture"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4hAPP-ae","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/posts\/634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/comments?post=634"}],"version-history":[{"count":7,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/posts\/634\/revisions"}],"predecessor-version":[{"id":758,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/posts\/634\/revisions\/758"}],"wp:attachment":[{"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/media?parent=634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/categories?post=634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sysdev.me\/old\/wp-json\/wp\/v2\/tags?post=634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}