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(*
Tux Commander - UGlibThreads - Threading support through the GLIB library
Copyright (C) 2007-2008 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;
type
TGlibThreadMethod = procedure of object;
TGlibThread = class
private
FHandle: PGThread;
FCreateSuspended: Boolean;
FTerminated: Boolean;
FSuspended: Boolean;
FReturnValue: Integer;
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; }
property ReturnValue: Integer read FReturnValue write FReturnValue;
end;
TGlibCriticalSection = class
private
FGMutex: TGStaticMutex;
public
constructor Create;
destructor Destroy;override;
procedure Enter;
procedure Leave;
procedure Acquire;
procedure Release;
end;
implementation
uses Classes, SysUtils, UCoreUtils;
function xg_thread_func(data: gpointer): gpointer; cdecl;
var Thread: TGlibThread;
FreeThread: Boolean;
begin
DebugMsg(['(II) TGlibThread.g_thread_func']);
Result := nil;
try
Thread := TGlibThread(data);
if Assigned(Thread) and (Thread is TGlibThread) then begin
Thread.Execute;
Result := gpointer(Thread.FReturnValue);
FreeThread := Thread.FreeOnTerminate;
if FreeThread then Thread.Free;
end 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;
end;
constructor TGlibThread.Create(CreateSuspended: Boolean);
begin
inherited Create;
DebugMsg(['(II) TGlibThread.Create']);
FSuspended := CreateSuspended;
FCreateSuspended := CreateSuspended;
FHandle := nil;
FReturnValue := 0;
FFreeOnTerminate := False;
if not CreateSuspended then Resume;
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(@xg_thread_func, Self, True, @err);
if FHandle = nil then begin
DebugMsg(['(EE) TGlibThread.Resume: Error creating new thread: ', err.message]);
g_error_free(err);
end;
end;
function TGlibThread.WaitFor: LongWord;
begin
if FHandle <> nil then g_thread_join(FHandle);
Result := FReturnValue;
end;
(**********************************************************************************************************************)
constructor TGlibCriticalSection.Create;
begin
inherited Create;
FGMutex := nG_STATIC_MUTEX_INIT;
end;
destructor TGlibCriticalSection.Destroy;
begin
inherited Destroy;
end;
procedure TGlibCriticalSection.Enter;
begin
Acquire;
end;
procedure TGlibCriticalSection.Leave;
begin
Release;
end;
procedure TGlibCriticalSection.Acquire;
begin
g_static_mutex_lock(@FGMutex);
end;
procedure TGlibCriticalSection.Release;
begin
g_static_mutex_unlock(@FGMutex);
end;
(**********************************************************************************************************************)
initialization
if not g_thread_supported then g_thread_init(nil);
finalization
end.
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