mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
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143 lines
3.8 KiB
ObjectPascal
143 lines
3.8 KiB
ObjectPascal
{
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***************************************************************************
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* *
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* This source is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This code is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details. *
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* *
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* A copy of the GNU General Public License is available on the World *
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* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
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* obtain it by writing to the Free Software Foundation, *
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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***************************************************************************
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}
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unit ProcessList;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, Process, LCLProc;
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type
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{ The TProcessList is used by the IDE to store all running programs and
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external tools, that are not watched. From time to time the IDE checks,
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if the processes has terminated and will free them cleanly to avoid
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zombies. }
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TProcessList = class
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private
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FItems: TList; // list of TProcess
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FFreeing: Boolean; // set wehn freeing stopped processes
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function GetCount: integer;
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function GetItems(Index: integer): TProcess;
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public
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constructor Create;
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destructor Destroy; override;
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function Add(NewProcess: TProcess): integer;
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procedure Clear;
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procedure FreeStoppedProcesses;
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public
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property Count: integer read GetCount;
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property Items[Index: integer]: TProcess read GetItems; default;
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end;
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function GetDefaultProcessList: TProcessList;
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implementation
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var
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DefaultProcessList: TProcessList;
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function GetDefaultProcessList: TProcessList;
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begin
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if DefaultProcessList=nil then DefaultProcessList:=TProcessList.Create;
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Result:=DefaultProcessList;
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end;
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{ TProcessList }
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function TProcessList.GetCount: integer;
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begin
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Result:=FItems.Count;
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end;
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function TProcessList.GetItems(Index: integer): TProcess;
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begin
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Result:=TProcess(FItems[Index]);
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end;
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constructor TProcessList.Create;
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begin
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FItems:=TList.Create;
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end;
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destructor TProcessList.Destroy;
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begin
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FreeStoppedProcesses;
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Clear;
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FItems.Free;
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inherited Destroy;
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end;
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function TProcessList.Add(NewProcess: TProcess): integer;
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begin
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Result:=FItems.Add(NewProcess);
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end;
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procedure TProcessList.Clear;
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var
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i: Integer;
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begin
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for i:=0 to FItems.Count-1 do
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Items[i].Free;
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FItems.Clear;
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end;
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procedure TProcessList.FreeStoppedProcesses;
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var
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AProcess: TProcess;
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i: Integer;
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begin
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// waitonexit or free may trigger another idle
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if FFreeing then Exit;
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FFreeing := True;
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try
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for i:=FItems.Count-1 downto 0 do begin
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AProcess:=Items[i];
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if AProcess.Running then continue;
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try
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try
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AProcess.WaitOnExit;
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AProcess.Free;
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finally
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FItems.Delete(i);
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end;
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except
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on E: Exception do begin
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DebugLn('Error freeing stopped process: ',E.Message);
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end;
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end;
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end;
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finally
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FFreeing := False;
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end;
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end;
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initialization
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DefaultProcessList:=nil;
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finalization
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DefaultProcessList.Free;
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DefaultProcessList:=nil;
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end.
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