{"id":5572,"date":"2022-07-22T21:46:14","date_gmt":"2022-07-22T13:46:14","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=5572"},"modified":"2022-07-22T21:46:15","modified_gmt":"2022-07-22T13:46:15","slug":"%e6%95%99%e7%a8%8bzasync-%e5%bc%82%e6%ad%a5%e7%bc%96%e7%a8%8b%e6%95%99%e7%a8%8b%e4%b9%8b%e4%b8%83%ef%bc%9a%e5%9c%a8%e5%90%8e%e5%8f%b0%e7%ba%bf%e7%a8%8b%e4%b8%ad-async-await","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=5572","title":{"rendered":"[\u6559\u7a0b]ZAsync \u5f02\u6b65\u7f16\u7a0b\u6559\u7a0b\u4e4b\u4e03\uff1a\u5728\u540e\u53f0\u7ebf\u7a0b\u4e2d async\/await"},"content":{"rendered":"\n<p>\u5728\u4e0a\u4e00\u8282\u4e2d\uff0c\u6211\u4eec\u505a\u4e86\u4e00\u4e2a\u7b80\u5355\u7684 async\/await \u7684\u4f8b\u5b50\uff0c\u8fd9\u4e00\u8282\u6211\u4eec\u7ee7\u7eed\u5bf9\u5176\u8fdb\u884c\u66f4\u8be6\u7ec6\u7684\u89e3\u6790\u3002<\/p>\n\n\n\n<p>\u524d\u9762\u6211\u4eec\u5df2\u7ecf\u8bf4\u8fc7\uff0casync\/await \u6a21\u5f0f\u662f\u4e00\u79cd\u534f\u540c\u5f0f\u7684\u591a\u4efb\u52a1\u6267\u884c\u673a\u5236\uff0c\u8981\u6c42\u5904\u7406\u4ee3\u7801\u5728\u7b49\u5f85\u4e00\u4e2a\u64cd\u4f5c\u65f6\uff08\u5982\u78c1\u76d8IO\u3001\u7f51\u7edcIO\u7b49\uff09\uff0c\u663e\u5f0f\u8c03\u7528\u5bf9\u5e94\u7684\u63a5\u53e3\uff08\u5bf9\u4e8e ZAsync \uff0c\u4e3a TZAsync.Yield\uff09\u3002\u5426\u5219\u4f7f\u7528 async\/await \u673a\u5236\u5e76\u4e0d\u80fd\u5e26\u6765\u6027\u80fd\u7684\u63d0\u5347\u3002<\/p>\n\n\n\n<p>\u5bf9\u4e8e\u4e3b\u7ebf\u7a0b\u6765\u8bf4\uff0cZAsync \u505a\u4e86\u4e00\u4e9b\u5904\u7406\uff0c\u76f4\u63a5\u5f15\u7528 fmx.zbar.async \u6216 vcl.zbar.async \uff0cZAsync \u4f1a\u76d1\u6d4b Application.OnIdle \u4e8b\u4ef6\uff0c\u5728\u7a7a\u95f2\u65f6\u89e6\u53d1 TZAsync.Yield\uff0c\u4ece\u800c\u4fdd\u8bc1 async \u51fd\u6570\u80fd\u591f\u6b63\u5e38\u6267\u884c\u3002await \u4f1a\u5f3a\u5236\u89e6\u53d1 TZAsync.Yield\uff0c\u8ba9\u51fa\u6267\u884c\u6743\u7ed9\u5176\u5b83\u5f02\u6b65\u4f5c\u4e1a\u5904\u7406\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u5728\u8bb2\u5177\u4f53\u7684\u793a\u4f8b\u4e4b\u524d\uff0c\u6211\u4eec\u9996\u5148\u628a\u5f02\u6b65\u6267\u884c\u7684\u4f5c\u4e1a\u4ee3\u7801\u8d34\u51fa\u6765\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>procedure TForm3.AsyncProc(ASender: IZAsyncInvoker; AIdent: String; ACheckCancel: Boolean);\nvar\n  T: Cardinal;\nbegin\n  LogMessage(Format('&#91;%s] \u5f00\u59cb\u6267\u884c\u2026\u2026', &#91;AIdent]));\n  T := TThread.GetTickCount;\n  while (TThread.GetTickCount - T &lt; 1000) do\n  begin\n    if ACheckCancel and ASender.IsCanceled then\n      break;\n    ASender.Yield;\n  end;\n  if ASender.IsCanceled then\n    LogMessage(Format('&#91;%s] \u6267\u884c\u88ab\u4e2d\u65ad.', &#91;AIdent]))\n  else\n    LogMessage(Format('&#91;%s] \u6267\u884c\u7ed3\u675f.', &#91;AIdent]));\nend;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6bb5\u4ee3\u7801\u6267\u884c\u65f6\uff0c\u5148\u8f93\u51fa\u4e00\u4e2a [XXX] \u5f00\u59cb\u6267\u884c\u2026\u2026\uff0c\u5e76\u4e14\u5728\u6267\u884c\u5b8c\u6210\u540e\uff0c\u6839\u636e\u662f\u5426\u88ab\u53d6\u6d88\uff0c\u8f93\u51fa\u6267\u884c\u88ab\u4e2d\u65ad\u8fd8\u662f\u6267\u884c\u7ed3\u675f\u7684\u63d0\u793a\u3002\u8fd9\u6bb5\u662f\u6211\u4eec\u540e\u9762\u793a\u4f8b\u7684\u5f02\u6b65\u4f5c\u4e1a\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>procedure TForm3.Button2Click(Sender: TObject);\nbegin\n  Memo1.Lines.Add(SLineBreak + '======= ' + TButton(Sender).Text + ' =========' + SLineBreak);\n  TThread.CreateAnonymousThread(\n    procedure\n    begin\n      LogMessage('\u5f53\u524d\u7ebf\u7a0b Id = ' + TThread.Current.ThreadID.ToString);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 1');\n        end);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 2');\n        end);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 3');\n        end);\n    end).Start;\nend;<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u4f60\u4f1a\u53d1\u73b0\u9664\u4e86\u8f93\u51fa\u4e00\u4e2a\u5f53\u524d\u7ebf\u7a0bID\u7684\u6d88\u606f\u5916\uff0c\u6211\u4eec\u7684\u5f02\u6b65\u8fc7\u7a0b\u4e00\u53e5\u6ca1\u6709\u6267\u884c\uff0c\u7ebf\u7a0b\u5c31\u9000\u51fa\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247.png\"><img loading=\"lazy\" decoding=\"async\" width=\"346\" height=\"81\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247.png\" alt=\"\" class=\"wp-image-5575\" srcset=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247.png 346w, https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-300x70.png 300w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><\/a><\/figure>\n\n\n\n<p>\u8981\u76f4\u63a5\u8ba9\u4e0a\u9762\u7684\u4ee3\u7801\u6267\u884c\uff0c\u6211\u4eec\u6709\u4e24\u79cd\u5904\u7406\u529e\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6700\u540e\u4e00\u4e2a\u5f02\u6b65\u8c03\u7528\uff0c\u7531 TZAsync.Async \u6539\u4e3a\u7528 TZAsync.AWait<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>procedure TForm3.Button2Click(Sender: TObject);\nbegin\n  Memo1.Lines.Add(SLineBreak + '======= ' + TButton(Sender).Text + ' =========' + SLineBreak);\n  TThread.CreateAnonymousThread(\n    procedure\n    begin\n      LogMessage('\u5f53\u524d\u7ebf\u7a0b Id = ' + TThread.Current.ThreadID.ToString);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 1');\n        end);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 2');\n        end);\n      <strong>TZAsync.AWait(<\/strong>\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 3');\n        end);\n    end).Start;\nend;<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5728\u7ebf\u7a0b\u9000\u51fa\u524d\uff0c\u8c03\u7528 TZAsync.Yield \u6765\uff0c\u4ee5\u89e6\u53d1\u5f02\u6b65\u6267\u884c\u524d\u9762\u7684\u5f02\u6b65\u8fc7\u7a0b<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>procedure TForm3.Button2Click(Sender: TObject);\nbegin\n  Memo1.Lines.Add(SLineBreak + '======= ' + TButton(Sender).Text + ' =========' + SLineBreak);\n  TThread.CreateAnonymousThread(\n    procedure\n    begin\n      LogMessage('\u5f53\u524d\u7ebf\u7a0b Id = ' + TThread.Current.ThreadID.ToString);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 1');\n        end);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 2');\n        end);\n      TZAsync.Async(\n        procedure(ASender: IZAsyncInvoker)\n        begin\n          AsyncProc(ASender, '\u540e\u53f0\u7ebf\u7a0b 3');\n        end);\n<strong>      TZAsync.Yield;<\/strong>\n    end).Start;\nend;<\/code><\/pre>\n\n\n\n<p>\u65e0\u8bba\u90a3\u4e00\u79cd\u90fd\u662f\u53ef\u4ee5\u7684\uff0c\u6211\u4eec\u770b\u4e00\u4e0b\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"344\" height=\"165\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-1.png\" alt=\"\" class=\"wp-image-5576\" srcset=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-1.png 344w, https:\/\/blog.qdac.cc\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-1-300x144.png 300w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><\/a><\/figure>\n\n\n\n<p><strong>[\u6ce8\u610f]<\/strong><\/p>\n\n\n\n<p>1\u3001 ZAsync \u4e00\u65e6\u5f00\u59cb\u8c03\u5ea6\u5f02\u6b65\u4f5c\u4e1a\uff0c\u7ebf\u7a0b\u53ea\u6709\u5728\u6240\u6709\u7684\u5f02\u6b65\u4f5c\u4e1a\u6267\u884c\u7ed3\u675f\u540e\u624d\u4f1a\u9000\u51fa\u3002\u4ee5\u524d\u9762\u7684\u4ee3\u7801\u4e3a\u4f8b\uff0cTZAsync.Yield \u4ea4\u51fa\u6267\u884c\u6743\u540e\uff0c\u540e\u53f03\u4e2a\u7ebf\u7a0b\u4f5c\u4e1a\u6267\u884c\u5b8c\u6210\u524d\uff0c\u7ebf\u7a0b\u4e0d\u4f1a\u9000\u51fa\u3002<\/p>\n\n\n\n<p>2\u3001async \u51fd\u6570\u7684\u6267\u884c\u987a\u5e8f\u662f\u6309\u7167\u52a0\u5165\u7684\u5148\u540e\u6267\u884c\uff0c\u4f46\u5b8c\u6210\u7684\u5148\u540e\u5e76\u4e0d\u4e00\u5b9a\u6309\u7167\u52a0\u5165\u7684\u5148\u540e\u6267\u884c\u3002\u5b9e\u9645\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5f02\u6b65\u4f5c\u4e1a\u51fd\u6570\u5185\u90e8\u8c03\u7528 TZAsync.Yield \u8ba9\u51fa\u6267\u884c\u6743\u65f6\uff0c\u522b\u7684\u5f02\u6b65\u4f5c\u4e1a\u51fd\u6570\u5c31\u4f1a\u83b7\u5f97\u5b8c\u6574\u7684\u63a7\u5236\u6743\uff0c\u5b83\u81ea\u5df1\u51b3\u5b9a\u4ec0\u4e48\u65f6\u5019\u91ca\u653e\u8fd9\u4e2a\u63a7\u5236\u6743\u3002<\/p>\n\n\n\n<p>3\u3001async\/await \u5f02\u6b65\u4f5c\u4e1a\u9700\u8981\u914d\u5957\u4f5c\u4e1a\u51fd\u6570\u652f\u6301\u8ba9\u51fa\u5bf9\u5e94\u7684\u65f6\u95f4\u7247\uff0c\u7528\u597d\u5b83\u53ef\u4ee5\u63d0\u5347\u7a0b\u5e8f\u7684\u5904\u7406\u80fd\u529b\u3002\u4f46\u5b83\u53ea\u662f\u57fa\u7840\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u81ea\u5df1\u7f16\u5199\u76f8\u5e94\u7684\u5f02\u6b65\u4f5c\u4e1a\u4ee3\u7801\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e0a\u4e00\u8282\u4e2d\uff0c\u6211\u4eec\u505a\u4e86\u4e00\u4e2a\u7b80\u5355\u7684 asyn [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8],"tags":[],"class_list":["post-5572","post","type-post","status-publish","format-standard","hentry","category-delphi"],"views":1764,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5572"}],"version-history":[{"count":1,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5572\/revisions"}],"predecessor-version":[{"id":5577,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/5572\/revisions\/5577"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}