{"id":849,"date":"2021-09-13T15:55:17","date_gmt":"2021-09-13T07:55:17","guid":{"rendered":"http:\/\/www.wayln.com\/?p=849"},"modified":"2021-09-13T15:55:17","modified_gmt":"2021-09-13T07:55:17","slug":"%e5%b9%b6%e8%a1%8c%e7%bc%96%e7%a8%8b%e5%9f%ba%e7%a1%80-%e5%8a%a8%e6%80%81%e5%b9%b6%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/www.wayln.com\/?p=849","title":{"rendered":"\u5e76\u884c\u7f16\u7a0b\u57fa\u7840\u2014\u2014\u52a8\u6001\u5e76\u884c"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_transparent no_bullets\"><p class=\"toc_title\">Contents<\/p><ul class=\"toc_list\"><li><a href=\"#i\"><span class=\"toc_number toc_depth_1\">1<\/span> \u95ee\u9898<\/a><\/li><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_1\">2<\/span> \u89e3\u51b3\u65b9\u6848<\/a><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_1\">3<\/span> \u8ba8\u8bba<\/a><\/li><\/ul><\/div>\n<h1><span id=\"i\">\u95ee\u9898<\/span><\/h1>\n<p>\u5047\u8bbe\u5f53\u4e0b\u7684\u5e76\u884c\u60c5\u51b5\u5f88\u590d\u6742\uff0c\u5e76\u884c\u4efb\u52a1\u7684\u7ed3\u6784\u53ca\u6570\u91cf\u53ea\u80fd\u4ece\u8fd0\u884c\u65f6\u83b7\u53d6\u7684\u4fe1\u606f\u4e2d\u5fc3\u77e5\u6653<\/p>\n<h1><span id=\"i-2\">\u89e3\u51b3\u65b9\u6848<\/span><\/h1>\n<p>TPL\u4ee5Task\u7c7b\u578b\u4e3a\u4e2d\u5fc3\u3002Parallel\u7c7b\u4ee5\u53caPLNQ\u53ea\u4e0d\u8fc7\u662f\u51fa\u4e8e\u4fbf\u5229\uff0c\u5bf9\u5f3a\u5927\u7684Task\u8fdb\u884c\u4e86\u5305\u88c5\uff0c\u5982\u679c\u8981\u52a8\u6001\u5e76\u884c\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u5c31\u662f\u76f4\u63a5\u4f7f\u7528Task\u7c7b\u578b<\/p>\n<pre><code class=\"language-CSharp line-numbers\">void Traverse(Node current)\n{\n    DoExpensiveActionOnNode(current);\n    if(current.Left!=null)\n    {\n        Task.Factory.StartNew(\n        ()=&gt;Traverse(current.left),CancellationToken.None,TaskCreationOption.AttachedToParent,TaskScheduler.Default);\n    }\n    if(current.Right!=null)\n    {\n        Task.Factory.StartNew(\n        ()=&gt;Traverse(current.Right),CancellationToken.None,TaskCreationOptions.AttachedToParent,TaskScheduler.Default);\n    }\n}\nvoid ProcessTree(Node root)\n{\n    Task task=Task.Factory.StartNew(\n        ()=&gt;Traverse(root),CancellationToken.None,TaskCreationOption.None,TaskScheduler.Default);\n    task.Wait();\n}\n<\/code><\/pre>\n<p>AttachedToParent\u6807\u5fd7\u786e\u4fdd\u4e86\u9488\u5bf9\u6bcf\u4e2a\u5206\u652f\u7684Task\u4e0e\u5176\u7236\u8282\u70b9\u7684Task\u5173\u8054\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5bf9\u6620\u5c04\u4e86\u6811\u8282\u70b9\u201c\u7236\u5b50\u201d\u5173\u7cfb\u7684Task\u5b9e\u4f8b\u800c\u8a00\uff0c\u4ed6\u4eec\u4e4b\u95f4\u4e5f\u5f62\u6210\u4e86\u201c\u7236\u5b50\u201d\u5173\u7cfb\u3002\u7236\u4efb\u52a1\u6267\u884c\u59d4\u6258\uff0c\u7136\u540e\u7b49\u5f85\u5b50\u4efb\u52a1\u5b8c\u6210\uff0c\u968f\u540e\u5b50\u4efb\u52a1\u629b\u51fa\u7684\u5f02\u5e38\u4f1a\u4ece\u5b50\u4efb\u52a1\u4f20\u5230\u7236\u4efb\u52a1\u3002\u56e0\u6b64\uff0c\u901a\u8fc7\u5bf9\u6811\u6839\u7684\u5355\u4e00Task\u8c03\u7528Wait, ProcessTree\u5c31\u53ef\u4ee5\u7b49\u5f85\u6574\u68f5\u6811\u7684\u4efb\u52a1\u3002<br \/>\n\u5982\u679c\u9047\u5230\u975e\u7236\u5b50\u578b\u7684\u60c5\u51b5\uff0c\u90a3\u4e48\u53ef\u4ee5\u901a\u8fc7\u4efb\u52a1\u5ef6\u7eed\u8c03\u5ea6\u4efb\u52a1\u7684\u6267\u884c\u987a\u5e8f\u3002\u5ef6\u7eed\u662f\u72ec\u7acb\u7684\u989d\u4efb\u52a1\uff0c\u4f1a\u5728\u539f\u59cb\u4efb\u52a1\u5b8c\u6210\u65f6\u6267\u884c\u3002<\/p>\n<pre><code class=\"language-CSharp line-numbers\">Task task=Task.Factory.StartNew(()=&gt;\nThread.Sleep(TimeSpan.FromSeconds(2)),CancellationToken.None,TaskCreationOpetions.None,TaskScheduler.Default);\nTask continuation=task.ContinueWith(\nt=&gt;Trace.WriteLine(\"Task is done\"),\n    CancellationToken.None,TaskContinuationOptions.None,TaskScheduler.Default);\n\n<\/code><\/pre>\n<h1><span id=\"i-3\">\u8ba8\u8bba<\/span><\/h1>\n<p><strong>\u5bf9\u5e76\u884c\u5904\u7406\u4f7f\u7528Task\u5b8c\u5168\u4e0d\u540c\u4e8e\u5bf9\u5f02\u6b65\u5904\u7406\u4f7f\u7528Task<\/strong><br \/>\n\u5728\u5e76\u53d1\u7f16\u7a0b\u4e2d\uff0cTask\u7c7b\u578b\u6709\u4e24\u4e2a\u4f5c\u7528\uff0c\u5145\u5f53\u79c9\u6027\u4efb\u52a1\u6216\u8005\u5145\u5f53\u5f02\u6b65\u4efb\u52a1\u3002\u5e76\u884c\u4efb\u52a1\u53ef\u80fd\u4f1a\u4f7f\u7528\u963b\u585e\u6210\u5458\uff0c\u4f8b\u5982Task.Wait\u3001Task.Result\u3001Task.WaitAll\u3001Task.WaitAny.\u79c9\u6027\u4efb\u52a1\u4e5f\u7ecf\u5e38\u4f7f\u7528AttachedToParent\u6765\u6784\u5efa\u4efb\u52a1\u4e4b\u95f4\u7684\u7236\u5b50\u5173\u7cfb\uff0c\u800c\u5e76\u884c\u4efb\u52a1\u672c\u8eab\u901a\u8fc7Task.Run\u6216\u8005Task.Factory.StartNew\u6765\u521b\u5efa\u3002<br \/>\n\u5f02\u6b65\u4efb\u52a1\u5e94\u5f53\u907f\u514d\u4f7f\u7528\u963b\u585e\u6210\u5458\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cawait\u3001Task.WhenAll\u3001Task.WhenAny\u66f4\u9002\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contents1 \u95ee\u98982 \u89e3\u51b3\u65b9\u68483 \u8ba8\u8bba \u95ee\u9898 \u5047\u8bbe\u5f53\u4e0b\u7684\u5e76\u884c\u60c5\u51b5\u5f88\u590d\u6742\uff0c\u5e76\u884c\u4efb\u52a1\u7684\u7ed3\u6784\u53ca\u6570\u91cf\u53ea\u80fd\u4ece\u8fd0\u884c\u65f6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,41,2],"tags":[],"class_list":["post-849","post","type-post","status-publish","format-standard","hentry","category-c","category-41","category-2"],"_links":{"self":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=849"}],"version-history":[{"count":1,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/849\/revisions"}],"predecessor-version":[{"id":850,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/849\/revisions\/850"}],"wp:attachment":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}