70aa57d3bb
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@6809 8e941d3f-bd1b-0410-a28a-d453659cc2b4
136 lines
2.8 KiB
ObjectPascal
136 lines
2.8 KiB
ObjectPascal
{
|
|
basics jobs for multi-threading(c) 2014 ti_dic
|
|
|
|
This library is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Library General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or (at your
|
|
option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
|
|
for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
}
|
|
unit mvJobs;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
interface
|
|
|
|
uses
|
|
Classes, SysUtils, mvJobQueue;
|
|
|
|
|
|
type
|
|
|
|
{ TSimpleJob: job with only one task }
|
|
|
|
TSimpleJob = class(TJob)
|
|
private
|
|
FRunning, FEnded: boolean;
|
|
protected
|
|
function pGetTask: integer; override;
|
|
procedure pTaskStarted(aTask: integer); override;
|
|
procedure pTaskEnded(aTask: integer; {%H-}aExcept: Exception); override;
|
|
public
|
|
function Running: boolean; override;
|
|
end;
|
|
|
|
TJobProc = procedure (Data: TObject; Job: TJob) of object;
|
|
|
|
{ TEventJob: job with only one task (callback an event) }
|
|
|
|
TEventJob = class(TSimpleJob)
|
|
private
|
|
FData: TObject;
|
|
FTask: TJobProc;
|
|
FOwnData: Boolean;
|
|
public
|
|
constructor Create(aEvent: TJobProc; Data: TObject; OwnData: Boolean;
|
|
JobName: String = ''); virtual;
|
|
destructor Destroy; override;
|
|
procedure ExecuteTask(aTask: integer; {%H-}FromWaiting: boolean); override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
{ TEventJob }
|
|
|
|
constructor TEventJob.Create(aEvent: TJobProc; Data: TObject;
|
|
OwnData: Boolean; JobName: String = '');
|
|
begin
|
|
Name := JobName;
|
|
FTask := aEvent;
|
|
if Assigned(Data) or OwnData then
|
|
begin
|
|
FData := Data;
|
|
FOwnData := OwnData;
|
|
end
|
|
else
|
|
begin
|
|
FOwnData := false;
|
|
FData := self;
|
|
end;
|
|
end;
|
|
|
|
destructor TEventJob.Destroy;
|
|
begin
|
|
if FOwnData then
|
|
if FData <> self then
|
|
FData.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TEventJob.ExecuteTask(aTask: integer; FromWaiting: boolean);
|
|
begin
|
|
if Assigned(FTask) then
|
|
FTask(FData, self);
|
|
end;
|
|
|
|
|
|
{ TSimpleJob }
|
|
|
|
function TSimpleJob.pGetTask: integer;
|
|
begin
|
|
if FRunning or Cancelled then
|
|
begin
|
|
if not FRunning then
|
|
Result := ALL_TASK_COMPLETED
|
|
else
|
|
Result := NO_MORE_TASK
|
|
end
|
|
else
|
|
begin
|
|
if FEnded then
|
|
Result := ALL_TASK_COMPLETED
|
|
else
|
|
Result := 1;
|
|
end;
|
|
end;
|
|
|
|
procedure TSimpleJob.pTaskStarted(aTask: integer);
|
|
begin
|
|
FEnded := false;
|
|
FRunning := True;
|
|
end;
|
|
|
|
procedure TSimpleJob.pTaskEnded(aTask: integer; aExcept: Exception);
|
|
begin
|
|
FEnded := True;
|
|
FRunning := False;
|
|
end;
|
|
|
|
function TSimpleJob.Running: boolean;
|
|
begin
|
|
Result := FRunning;
|
|
end;
|
|
|
|
|
|
end.
|
|
|