{"id":2819,"date":"2019-09-05T21:31:26","date_gmt":"2019-09-05T12:31:26","guid":{"rendered":"http:\/\/okamurax.com\/?p=2819"},"modified":"2021-04-19T15:31:23","modified_gmt":"2021-04-19T06:31:23","slug":"c-lock%e3%83%a1%e3%83%a2","status":"publish","type":"post","link":"https:\/\/appbay.org\/?p=2819","title":{"rendered":"C# Parallel.For, lock\u6587 \u30e1\u30e2"},"content":{"rendered":"<pre class=\"lang:c# decode:true \">using System;\r\nusing System.Threading.Tasks;\r\nusing System.Windows.Forms;\r\n\r\nnamespace WindowsFormsApp1\r\n{\r\n    static class Program\r\n    {\r\n        [STAThread]\r\n        static void Main()\r\n        {\r\n            Parallel.For(0, 3, x =&gt; {\r\n                MessageBox.Show(x.ToString());\r\n                \/\/ 0, 1, 2 \u304c\u540c\u6642\u306b\u8868\u793a\u3055\u308c\u308b\u30023\u3064\u306e\u30b9\u30ec\u30c3\u30c9\u3068\u306a\u3063\u3066\u3044\u308b(\u9806\u756a\u3082\u4e0d\u5b9a)\r\n            });\r\n            \r\n            \/\/ \u7d42\u4e86\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f-1\u3068\u306a\u308b\r\n\r\n            Parallel.For(2, 5, x =&gt; {\r\n                MessageBox.Show(x.ToString());\r\n                \/\/ 2, 3, 4 \u304c\u540c\u6642\u306b\u8868\u793a\u3055\u308c\u308b\u30023\u3064\u306e\u30b9\u30ec\u30c3\u30c9\u3068\u306a\u3063\u3066\u3044\u308b(\u9806\u756a\u3082\u4e0d\u5b9a)\r\n            });\r\n\r\n            \/\/ \u5404\u30b9\u30ec\u30c3\u30c9\u304c\u540c\u6642\u306b\u51e6\u7406\u3092\u884c\u3063\u3066\u306f\u3044\u3051\u306a\u3044\u90e8\u5206(\u6392\u4ed6\u30bb\u30af\u30b7\u30e7\u30f3)\u306b\u5165\u308b\u524d\u306b\r\n            \/\/ \u540c\u671f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(lockObject)\u306b\u5bfe\u3057\u30011\u3064\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u6392\u4ed6\u30ed\u30c3\u30af\u3092\u884c\u3044\u3001\r\n            \/\/ \u51e6\u7406\u304c\u7d42\u308f\u3063\u305f\u3089\u6392\u4ed6\u30ed\u30c3\u30af\u3092\u89e3\u9664\u3059\u308b\u3002\r\n\r\n            \/\/ Monitor\u30af\u30e9\u30b9\u306eEnter()\u3068Exit()\u306e\u5834\u5408\u3002\r\n            \/\/ \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308b\u3068MessageBox\u306f\u4e00\u3064\u305a\u3064\u306e\u8868\u793a\u3068\u306a\u308b\u3002\r\n\r\n            var lockObject = new object();\r\n\r\n            Parallel.For(0, 3, x =&gt; {\r\n                bool lockTaken = false;\r\n                System.Threading.Monitor.Enter(lockObject, ref lockTaken);\r\n                MessageBox.Show(x.ToString());\r\n                if (lockTaken) System.Threading.Monitor.Exit(lockObject); \/\/ Enter()\u305b\u305a\u306bExit()\u3068\u3059\u308b\u3068\u3001\u975e\u540c\u671f\u30d6\u30ed\u30c3\u30af\u304b\u3089\u306e\u547c\u3073\u51fa\u3057\u3067\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3002\r\n            });\r\n\r\n            \/\/ lock\u6587\u304c\u6a19\u6e96\u3067\u3042\u308b\u3002\u5185\u90e8\u7684\u306b\u306fEnter(),Exit()\u3068\u540c\u3058\u3002\r\n\r\n            var lockObject = new object();\r\n\r\n            Parallel.For(0, 3, x =&gt; {\r\n\r\n                lock(lockObject)\r\n                {\r\n                    MessageBox.Show(x.ToString());\r\n                }\r\n            });\r\n\r\n            \/\/ lock\u6587\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5c55\u958b\u3055\u308c\u308b\u3089\u3057\u3044\u3002\r\n\r\n            object syncObject = new object();\r\n\r\n            bool taken = false;\r\n            try\r\n            {\r\n                System.Threading.Monitor.Enter(syncObject, ref taken);\r\n            }\r\n            finally\r\n            {\r\n                if (taken) System.Threading.Monitor.Exit(syncObject);\r\n            }\r\n\r\n        }\r\n    }\r\n}\r\n<\/pre>\n<pre class=\"lang:c# decode:true \">using System;\r\nusing System.Threading.Tasks;\r\nusing System.Windows.Forms;\r\n\r\nnamespace WindowsFormsApp1\r\n{\r\n    static class Program\r\n    {\r\n        [STAThread]\r\n        static void Main()\r\n        {\r\n            \/\/ \u5171\u6709\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u306a\u306e\u3067\u3001\r\n            \/\/ \u4ee5\u4e0b\u306e\u5834\u5408A:0, B:0\u306f\u540c\u6642\u306b\u8868\u793a\u3055\u308c\u308b\u3002\r\n\r\n            var t1 = Task.Run(() =&gt;\r\n            {\r\n                new TestClass(\"A\");\r\n            });\r\n            new TestClass(\"B\");\r\n\r\n            \/\/ \u5171\u6709\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u3059\u308c\u3070\u3001\r\n            \/\/ AA, BB\u306f\u540c\u6642\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u3002\r\n\r\n            object syncObject = new object();\r\n\r\n            var t2 = Task.Run(() =&gt;\r\n            {\r\n                new TestClass2(\"AA\", syncObject);\r\n            });\r\n            new TestClass2(\"BB\", syncObject);\r\n\r\n            \/\/ \u3053\u306e\u5b9f\u9a13\u306e\u5834\u5408\u306e\u3088\u3046\u306b\u66f8\u304f\u3068BB:1\u304c\u8868\u793a\u3055\u308c\u305f\u6642\u70b9\u3067\u672c\u4f53\u304c\u7d42\u4e86\u3057\u3066\u3057\u307e\u3046\u305f\u3081\u3001\r\n            \/\/ 4\u56de\u3059\u3079\u3066\u8868\u793a\u3055\u308c\u306a\u3044\u3053\u3068\u3082\u591a\u3044\u3002\r\n        }\r\n    }   \r\n\r\n    public class TestClass\r\n    {\r\n        object syncObject = new object();\r\n        public TestClass(string n)\r\n        {\r\n            Parallel.For(0, 2, x =&gt;\r\n             {\r\n                 lock (syncObject)\r\n                 {\r\n                     MessageBox.Show(n + \":\" + x.ToString());\r\n                 }\r\n             });\r\n        }\r\n    }\r\n\r\n    public class TestClass2\r\n    {\r\n        public TestClass2(string n, object syncObject)\r\n        {\r\n            Parallel.For(0, 2, x =&gt;\r\n            {\r\n                lock (syncObject)\r\n                {\r\n                    MessageBox.Show(n + \":\" + x.ToString());\r\n                }\r\n            });\r\n        }\r\n    }\r\n}\r\n<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>using System; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApp1 { static cl &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/appbay.org\/?p=2819\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;C# Parallel.For, lock\u6587 \u30e1\u30e2&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[9],"class_list":["post-2819","post","type-post","status-publish","format-standard","hentry","category-1","tag-c-net"],"_links":{"self":[{"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/posts\/2819","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/appbay.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2819"}],"version-history":[{"count":4,"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/posts\/2819\/revisions"}],"predecessor-version":[{"id":4351,"href":"https:\/\/appbay.org\/index.php?rest_route=\/wp\/v2\/posts\/2819\/revisions\/4351"}],"wp:attachment":[{"href":"https:\/\/appbay.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/appbay.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/appbay.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}