cac83daa65
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7365 8e941d3f-bd1b-0410-a28a-d453659cc2b4
131 lines
2.4 KiB
ObjectPascal
131 lines
2.4 KiB
ObjectPascal
{
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basic jobs for multi-threading
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(C) 2014 ti_dic@hotmail.com
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License: modified LGPL with linking exception (like RTL, FCL and LCL)
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See the file COPYING.modifiedLGPL.txt, included in the Lazarus distribution,
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for details about the license.
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See also: https://wiki.lazarus.freepascal.org/FPC_modified_LGPL
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}
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unit mvJobs;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, mvJobQueue;
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type
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{ TSimpleJob: job with only one task }
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TSimpleJob = class(TJob)
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private
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FRunning, FEnded: boolean;
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protected
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function pGetTask: integer; override;
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procedure pTaskStarted(aTask: integer); override;
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procedure pTaskEnded(aTask: integer; {%H-}aExcept: Exception); override;
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public
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function Running: boolean; override;
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end;
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TJobProc = procedure (Data: TObject; Job: TJob) of object;
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{ TEventJob: job with only one task (callback an event) }
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TEventJob = class(TSimpleJob)
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private
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FData: TObject;
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FTask: TJobProc;
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FOwnData: Boolean;
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public
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constructor Create(aEvent: TJobProc; Data: TObject; OwnData: Boolean;
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JobName: String = ''); virtual;
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destructor Destroy; override;
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procedure ExecuteTask(aTask: integer; {%H-}FromWaiting: boolean); override;
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end;
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implementation
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{ TEventJob }
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constructor TEventJob.Create(aEvent: TJobProc; Data: TObject;
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OwnData: Boolean; JobName: String = '');
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begin
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Name := JobName;
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FTask := aEvent;
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if Assigned(Data) or OwnData then
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begin
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FData := Data;
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FOwnData := OwnData;
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end
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else
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begin
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FOwnData := false;
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FData := self;
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end;
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end;
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destructor TEventJob.Destroy;
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begin
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if FOwnData then
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if FData <> self then
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FData.Free;
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inherited Destroy;
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end;
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procedure TEventJob.ExecuteTask(aTask: integer; FromWaiting: boolean);
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begin
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if Assigned(FTask) then
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FTask(FData, self);
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end;
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{ TSimpleJob }
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function TSimpleJob.pGetTask: integer;
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begin
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if FRunning or Cancelled then
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begin
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if not FRunning then
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Result := ALL_TASK_COMPLETED
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else
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Result := NO_MORE_TASK
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end
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else
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begin
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if FEnded then
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Result := ALL_TASK_COMPLETED
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else
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Result := 1;
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end;
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end;
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procedure TSimpleJob.pTaskStarted(aTask: integer);
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begin
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FEnded := false;
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FRunning := True;
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end;
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procedure TSimpleJob.pTaskEnded(aTask: integer; aExcept: Exception);
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begin
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FEnded := True;
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FRunning := False;
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end;
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function TSimpleJob.Running: boolean;
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begin
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Result := FRunning;
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end;
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end.
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