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{ Asynchronous process support
Copyright (C) 2006-2008 Micha Nelissen
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
This license has been modified. See file LICENSE.ADDON for more information.
Should you find these sources without a LICENSE File, please contact
me at ales@chello.sk
}
unit lProcess;
{$mode objfpc}{$h+}
interface
uses
sysutils, classes, process, levents, pipes;
type
TLInputPipeStream = class(TInputPipeStream)
protected
FEvent: TLHandle;
public
function Read(var Buffer; Count: longint): longint; override;
end;
TLOutputPipeStream = class(TOutputPipeStream)
protected
FEvent: TLHandle;
public
function Write(const Buffer; Count: longint): longint; override;
end;
TLProcess = class(TProcess)
protected
FInputEvent: TLHandle;
FOutputEvent: TLHandle;
FStderrEvent: TLHandle;
FEventer: TLEventer;
function GetOnNeedInput: TLHandleEvent;
function GetOnHasOutput: TLHandleEvent;
function GetOnHasStderr: TLHandleEvent;
procedure SetOnNeedInput(NewOnInput: TLHandleEvent);
procedure SetOnHasOutput(NewOnOutput: TLHandleEvent);
procedure SetOnHasStderr(NewOnStderr: TLHandleEvent);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure CloseInput; override;
procedure CloseOutput; override;
procedure CloseStderr; override;
procedure Execute; override;
property InputEvent: TLHandle read FInputEvent;
property OutputEvent: TLHandle read FOutputEvent;
property StderrEvent: TLHandle read FStderrEvent;
property Eventer: TLEventer read FEventer write FEventer;
property OnNeedInput: TLHandleEvent read GetOnNeedInput write SetOnNeedInput;
property OnHasOutput: TLHandleEvent read GetOnHasOutput write SetOnHasOutput;
property OnHasStderr: TLHandleEvent read GetOnHasStderr write SetOnHasStderr;
end;
implementation
function TLInputPipeStream.Read(var Buffer; Count: longint): longint;
begin
Result := inherited;
FEvent.IgnoreRead := false;
end;
function TLOutputPipeStream.Write(const Buffer; Count: longint): longint;
begin
Result := inherited;
FEvent.IgnoreWrite := false;
end;
constructor TLProcess.Create(AOwner: TComponent);
begin
inherited;
FInputEvent := TLHandle.Create;
FOutputEvent := TLHandle.Create;
FStderrEvent := TLHandle.Create;
end;
destructor TLProcess.Destroy;
begin
inherited;
FInputEvent.Free;
FOutputEvent.Free;
FStderrEvent.Free;
end;
procedure TLProcess.CloseInput;
begin
FEventer.UnplugHandle(FInputEvent);
inherited;
end;
procedure TLProcess.CloseOutput;
begin
FEventer.UnplugHandle(FOutputEvent);
inherited;
end;
procedure TLProcess.CloseStderr;
begin
FEventer.UnplugHandle(FStderrEvent);
inherited;
end;
procedure TLProcess.Execute;
begin
inherited;
if (poUsePipes in Options) and (FEventer <> nil) then
begin
if Input <> nil then
begin
FInputEvent.Handle := Input.Handle;
FInputEvent.IgnoreRead := true;
FEventer.AddHandle(FInputEvent);
end;
if Output <> nil then
begin
FOutputEvent.Handle := Output.Handle;
FOutputEvent.IgnoreWrite := true;
FEventer.AddHandle(FOutputEvent);
end;
if Stderr <> nil then
begin
FStderrEvent.Handle := Stderr.Handle;
FStderrEvent.IgnoreWrite := true;
FEventer.AddHandle(FStderrEvent);
end;
end;
end;
function TLProcess.GetOnNeedInput: TLHandleEvent;
begin
Result := FInputEvent.OnWrite;
end;
function TLProcess.GetOnHasOutput: TLHandleEvent;
begin
Result := FOutputEvent.OnRead;
end;
function TLProcess.GetOnHasStderr: TLHandleEvent;
begin
Result := FStderrEvent.OnRead;
end;
procedure TLProcess.SetOnNeedInput(NewOnInput: TLHandleEvent);
begin
FInputEvent.OnWrite := NewOnInput;
end;
procedure TLProcess.SetOnHasOutput(NewOnOutput: TLHandleEvent);
begin
FOutputEvent.OnRead := NewOnOutput;
end;
procedure TLProcess.SetOnHasStderr(NewOnStderr: TLHandleEvent);
begin
FStderrEvent.OnRead := NewOnStderr;
end;
end.
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