145 lines
3.2 KiB
Plaintext
145 lines
3.2 KiB
Plaintext
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{
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$Project$
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$Workfile$
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$Revision$
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$DateUTC$
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$Id$
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This file is part of the Indy (Internet Direct) project, and is offered
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under the dual-licensing agreement described on the Indy website.
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(http://www.indyproject.org/)
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Copyright:
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(c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
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}
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{
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$Log$
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}
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{
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Rev 1.2 2003.11.04 3:49:00 PM czhower
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Update to sync TC
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Rev 1.1 2003.10.21 12:19:02 AM czhower
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TIdTask support and fiber bug fixes.
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}
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unit IdTask;
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interface
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{$i IdCompilerDefines.inc}
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uses
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{$IFDEF USE_OBJECT_ARC}
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IdGlobal,
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{$ENDIF}
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IdYarn,
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SysUtils;
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type
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TIdTask = class(TObject)
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protected
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FBeforeRunDone: Boolean;
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{$IFDEF USE_OBJECT_ARC}
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// When ARC is enabled, object references MUST be valid objects.
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// It is common for users to store non-object values, though, so
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// we will provide separate properties for those purposes
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//
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// TODO; use TValue instead of separating them
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//
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FDataObject: TObject;
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FDataValue: PtrInt;
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{$ELSE}
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FData: TObject;
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{$ENDIF}
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FYarn: TIdYarn;
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//
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procedure AfterRun; virtual;
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procedure BeforeRun; virtual;
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function Run: Boolean; virtual; abstract;
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procedure HandleException(AException: Exception); virtual;
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public
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constructor Create(
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AYarn: TIdYarn
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); reintroduce; virtual;
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destructor Destroy; override;
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// The Do's are separate so we can add events later if necessary without
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// needing the inherited calls to perform them, as well as allowing
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// us to keep the real runs as protected
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procedure DoAfterRun;
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procedure DoBeforeRun;
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function DoRun: Boolean;
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procedure DoException(AException: Exception);
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// BeforeRunDone property to allow flexibility in alternative schedulers
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property BeforeRunDone: Boolean read FBeforeRunDone;
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//
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{$IFDEF USE_OBJECT_ARC}
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property DataObject: TObject read FDataObject write FDataObject;
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property DataValue: PtrInt read FDataValue write FDataValue;
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{$ELSE}
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property Data: TObject read FData write FData;
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{$ENDIF}
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property Yarn: TIdYarn read FYarn;
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end;
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implementation
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{$IFNDEF USE_OBJECT_ARC}
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uses
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IdGlobal;
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{$ENDIF}
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{ TIdTask }
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procedure TIdTask.AfterRun;
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begin
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end;
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procedure TIdTask.BeforeRun;
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begin
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end;
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procedure TIdTask.HandleException(AException: Exception);
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begin
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end;
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constructor TIdTask.Create(AYarn: TIdYarn);
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begin
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inherited Create;
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FYarn := AYarn;
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FBeforeRunDone := False;
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end;
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destructor TIdTask.Destroy;
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begin
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// Dont free the yarn, that is the responsibilty of the thread / fiber.
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// .Yarn here is just a reference, not an ownership
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FreeAndNil({$IFDEF USE_OBJECT_ARC}FDataObject{$ELSE}FData{$ENDIF});
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{$IFDEF USE_OBJECT_ARC}
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FDataValue := 0;
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{$ENDIF}
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inherited Destroy;
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end;
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procedure TIdTask.DoAfterRun;
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begin
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AfterRun;
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end;
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procedure TIdTask.DoBeforeRun;
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begin
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FBeforeRunDone := True;
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BeforeRun;
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end;
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function TIdTask.DoRun: Boolean;
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begin
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Result := Run;
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end;
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procedure TIdTask.DoException(AException: Exception);
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begin
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HandleException(AException);
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end;
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end.
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