TAsyncProcess: what changed
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| 1 | + | **TAsyncProcess** [](</File:tasyncprocess.png>) is a non-visual component on the [[System tab]] of the [[Component Palette]] and is a version of the [[TProcessUTF8]] component can handle asynchroneous execution. | |
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| 3 | + | The implementation of TAsyncProcess relies on immediate notifications for process output rather than a busy loop. Specifically, it typically utilizes operating system-specific mechanisms (like pipes in Windows or Unix) to capture output from the external process without actively polling for data in a busy loop. | |
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| 5 | + | This means that rather than continually checking if data is available (which would be inefficient and consume unnecessary CPU resources), TAsyncProcess can use events or callbacks that trigger when data is available. This is a more efficient method for handling process output, as it allows the application to respond only when necessary. | |
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| 3 | 7 | ## See also | |
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| 9 | + | * [TAsyncProcess doc](<http://lazarus-ccr.sourceforge.net/docs/lcl/asyncprocess/tasyncprocess.html> "doc:lcl/asyncprocess/tasyncprocess.html") | |
| 10 | + | * [[TProcess]] | |
| 11 | + | * [[TProcessUTF8]] | |
| 12 | + | * [[LCL Unicode Support]] | |
| 13 | + | * [[Executing External Programs]] | |
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| 17 | + | [[LCL Components]] Component Tab | Components | |
| 18 | + | ---|--- | |
| 19 | + | [[Standard tab|Standard]] | [[TMainMenu]] • [[TPopupMenu]] • [[TButton]] • [[TLabel]] • [[TEdit]] • [[TMemo]] • [[TToggleBox]] • [[TCheckBox]] • [[TRadioButton]] • [[TListBox]] • [[TComboBox]] • [[TScrollBar]] • [[TGroupBox]] • [[TRadioGroup]] • [[TCheckGroup]] • [[TPanel]] • [[TFrame]] • [[TActionList]] | |
| 20 | + | [[Additional tab|Additional]] | [[TBitBtn]] • [[TSpeedButton]] • [[TStaticText]] • [[TImage]] • [[TShape]] • [[TBevel]] • [[TPaintBox]] • [[TNotebook]] • [[TLabeledEdit]] • [[TSplitter]] • [[TTrayIcon]] • [[TControlBar]] • [[TFlowPanel]] • [[TMaskEdit]] • [[TCheckListBox]] • [[TScrollBox]] • [[TApplicationProperties]] • [[TStringGrid]] • [[TDrawGrid]] • [[TPairSplitter]] • [[TColorBox]] • [[TColorListBox]] • [[TValueListEditor]] | |
| 21 | + | [[Common Controls tab|Common Controls]] | [[TTrackBar]] • [[TProgressBar]] • [[TTreeView]] • [[TListView]] • [[TStatusBar]] • [[TToolBar]] • [[TCoolBar]] • [[TUpDown]] • [[TPageControl]] • [[TTabControl]] • [[THeaderControl]] • [[TImageList]] • [[TPopupNotifier]] • [[TDateTimePicker]] | |
| 22 | + | [[Dialogs tab|Dialogs]] | [[TOpenDialog]] • [[TSaveDialog]] • [[TSelectDirectoryDialog]] • [[TColorDialog]] • [[TFontDialog]] • [[TFindDialog]] • [[TReplaceDialog]] • [[TTaskDialog]] • [[TOpenPictureDialog]] • [[TSavePictureDialog]] • [[TCalendarDialog]] • [[TCalculatorDialog]] • [[TPrinterSetupDialog]] • [[TPrintDialog]] • [[TPageSetupDialog]] | |
| 23 | + | [[Data Controls tab|Data Controls]] | [[TDBNavigator]] • [[TDBText]] • [[TDBEdit]] • [[TDBMemo]] • [[TDBImage]] • [[TDBListBox]] • [[TDBLookupListBox]] • [[TDBComboBox]] • [[TDBLookupComboBox]] • [[TDBCheckBox]] • [[TDBRadioGroup]] • [[TDBCalendar]] • [[TDBGroupBox]] • [[TDBGrid]] • [[TDBDateTimePicker]] | |
| 24 | + | [[Data Access tab|Data Access]] | [[TDataSource]] • [[TCSVDataSet]] • [[TSdfDataSet]] • [[TBufDataset]] • [[TFixedFormatDataSet]] • [[TDbf]] • [[TMemDataset]] | |
| 25 | + | [[System tab|System]] | [[TTimer]] • [[TIdleTimer]] • [[TLazComponentQueue]] • [[THTMLHelpDatabase]] • [[THTMLBrowserHelpViewer]] • TAsyncProcess • [[TProcessUTF8]] • [[TProcess]] • [[TSimpleIPCClient]] • [[TSimpleIPCServer]] • [[TXMLConfig]] • [[TEventLog]] • [[TServiceManager]] • [[TCHMHelpDatabase]] • [[TLHelpConnector]] | |
| 26 | + | [[Misc tab|Misc]] | [[TColorButton]] • [[TSpinEdit]] • [[TFloatSpinEdit]] • [[TArrow]] • [[TCalendar]] • [[TEditButton]] • [[TFileNameEdit]] • [[TDirectoryEdit]] • [[TDateEdit]] • [[TTimeEdit]] • [[TCalcEdit]] • [[TFileListBox]] • [[TFilterComboBox]] • [[TComboBoxEx]] • [[TCheckComboBox]] • [[TButtonPanel]] • [[TShellTreeView]] • [[TShellListView]] • [[TXMLPropStorage]] • [[TINIPropStorage]] • [[TJSONPropStorage]] • [[TIDEDialogLayoutStorage]] • [[TMRUManager]] • [[TStrHolder]] | |
| 27 | + | [[LazControls tab|LazControls]] | [[TCheckBoxThemed]] • [[TDividerBevel]] • [[TExtendedNotebook]] • [[TListFilterEdit]] • [[TListViewFilterEdit]] • [[TLvlGraphControl]] • [[TShortPathEdit]] • [[TSpinEditEx]] • [[TFloatSpinEditEx]] • [[TTreeFilterEdit]] • [[TExtendedTabControl]] • | |
| 28 | + | [[RTTI tab|RTTI]] | [[TTIEdit]] • [[TTIComboBox]] • [[TTIButton]] • [[TTICheckBox]] • [[TTILabel]] • [[TTIGroupBox]] • [[TTIRadioGroup]] • [[TTICheckGroup]] • [[TTICheckListBox]] • [[TTIListBox]] • [[TTIMemo]] • [[TTICalendar]] • [[TTIImage]] • [[TTIFloatSpinEdit]] • [[TTISpinEdit]] • [[TTITrackBar]] • [[TTIProgressBar]] • [[TTIMaskEdit]] • [[TTIColorButton]] • [[TMultiPropertyLink]] • [[TTIPropertyGrid]] • [[TTIGrid]] | |
| 29 | + | [[SQLdb tab|SQLdb]] | [[TSQLQuery]] • [[TSQLTransaction]] • [[TSQLScript]] • [[TSQLConnector]] • [[TMSSQLConnection]] • [[TSybaseConnection]] • [[TPQConnection]] • [[TPQTEventMonitor]] • [[TOracleConnection]] • [[TODBCConnection]] • [[TMySQL40Connection]] • [[TMySQL41Connection]] • [[TMySQL50Connection]] • [[TMySQL51Connection]] • [[TMySQL55Connection]] • [[TMySQL56Connection]] • [[TMySQL57Connection]] • [[TSQLite3Connection]] • [[TIBConnection]] • [[TFBAdmin]] • [[TFBEventMonitor]] • [[TSQLDBLibraryLoader]] | |
| 30 | + | [[Pascal Script tab|Pascal Script]] | [[TPSScript]] • [[TPSScriptDebugger]] • [[TPSDllPlugin]] • [[TPSImport Classes]] • [[TPSImport DateUtils]] • [[TPSImport ComObj]] • [[TPSImport DB]] • [[TPSImport Forms]] • [[TPSImport Controls]] • [[TPSImport StdCtrls]] • [[TPSCustomPlugin]] | |
| 31 | + | [[SynEdit tab|SynEdit]] | [[TSynEdit]] • [[TSynCompletion]] • [[TSynAutoComplete]] • [[TSynMacroRecorder]] • [[TSynExporterHTML]] • [[TSynPluginSyncroEdit]] • [[TSynPasSyn]] • [[TSynFreePascalSyn]] • [[TSynCppSyn]] • [[TSynJavaSyn]] • [[TSynPerlSyn]] • [[TSynHTMLSyn]] • [[TSynXMLSyn]] • [[TSynLFMSyn]] • [[TSynDiffSyn]] • [[TSynUNIXShellScriptSyn]] • [[TSynCssSyn]] • [[TSynPHPSyn]] • [[TSynTeXSyn]] • [[TSynSQLSyn]] • [[TSynPythonSyn]] • [[TSynVBSyn]] • [[TSynAnySyn]] • [[TSynMultiSyn]] • [[TSynBatSyn]] • [[TSynIniSyn]] • [[TSynPoSyn]] | |
| 32 | + | [[Chart tab|Chart]] | [[TChart]] • [[TListChartSource]] • [[TRandomChartSource]] • [[TUserDefinedChartSource]] • [[TCalculatedChartSource]] • [[TDbChartSource]] • [[TChartToolset]] • [[TChartAxisTransformations]] • [[TChartStyles]] • [[TChartLegendPanel]] • [[TChartNavScrollBar]] • [[TChartNavPanel]] • [[TIntervalChartSource]] • [[TDateTimeIntervalChartSource]] • [[TChartListBox]] • [[TChartExtentLink]] • [[TChartImageList]] | |
| 33 | + | [[IPro tab|IPro]] | [[TIpFileDataProvider]] • [[TIpHtmlDataProvider]] • [[TIpHttpDataProvider]] • [[TIpHtmlPanel]] | |
| 34 | + | [[Virtual Controls tab|Virtual Controls]] | [[TVirtualDrawTree]] • [[TVirtualStringTree]] • [[TVTHeaderPopupMenu]] | |
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| 11 | 36 | --- | |
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| 37 | + | *From the Free Pascal wiki, page "TAsyncProcess", as the Internet Archive kept it on 2025-01-14, last changed on 2024-07-22. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |