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(*
Tux Commander - UGlibThreads - Threading support through the GLIB library
Copyright (C) 2007 Tomas Bzatek <tbzatek@users.sourceforge.net>
Check for updates on tuxcmd.sourceforge.net
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
unit UGlibThreads;
interface
uses glib2;
// function xg_thread_supported(): gboolean; cdecl; external 'libgthread-2.0.so' name 'g_thread_supported';
// function xg_thread_create(func: TGThreadFunc; data: gpointer; joinable: gboolean; error: PPGError): PGThread; external 'libgthread-2.0.so' name 'g_thread_create';
type
TGlibThreadMethod = procedure of object;
TGlibThread = class
private
FHandle: PGThread;
FCreateSuspended: Boolean;
FTerminated: Boolean;
FSuspended: Boolean;
// FFreeOnTerminate: Boolean;
// FFinished: Boolean;
// procedure SetSuspended(Value: Boolean);
protected
// procedure DoTerminate; virtual;
procedure Execute; virtual; abstract;
property Terminated: Boolean read FTerminated;
public
constructor Create(CreateSuspended: Boolean);
destructor Destroy; override;
// procedure AfterConstruction; override;
procedure Resume;
{ procedure Suspend;
procedure Terminate;
function WaitFor: LongWord;
property FreeOnTerminate: Boolean read FFreeOnTerminate write FFreeOnTerminate;
property Suspended: Boolean read FSuspended write SetSuspended; }
end;
implementation
uses Classes, SysUtils, UCoreUtils;
function xg_thread_func(data: gpointer): gpointer; cdecl;
begin
DebugMsg(['(II) TGlibThread.g_thread_func']);
try
{ if Assigned(data) and (TObject(data) is TGlibThread)
then TGlibThread(data).Execute
else DebugMsg(['(EE) TGlibThread.g_thread_func: wrong data argument']); }
except
on E: Exception do
DebugMsg(['(EE) TGlibThread.g_thread_func: Exception ', E.ClassName, ': ', E.Message]);
end;
Result := data;
end;
constructor TGlibThread.Create(CreateSuspended: Boolean);
begin
DebugMsg(['(II) TGlibThread.Create']);
inherited Create;
FSuspended := CreateSuspended;
FCreateSuspended := CreateSuspended;
FHandle := nil;
end;
destructor TGlibThread.Destroy;
begin
DebugMsg(['(II) TGlibThread.Destroy']);
{ if (FHandle <> nil) and not FFinished then
begin
Terminate;
if FCreateSuspended then
Resume;
WaitFor;
end; }
inherited Destroy;
end;
procedure TGlibThread.Resume;
var err: PGError;
begin
DebugMsg(['(II) TGlibThread.Resume']);
err := nil;
FHandle := g_thread_create_full(@xg_thread_func, Self, 0, False, False, G_THREAD_PRIORITY_NORMAL, @err);
if FHandle = nil then DebugMsg(['(EE) TGlibThread.Resume: Error creating new thread: ', err.message]);
end;
end.
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