/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * OLE initialization
 *
 * Copyright 2008 Mindaugas Kavaliauskas <dbtopas at dbtopas.lt>
 * www - http://harbour-project.org
 *
 * 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, 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbwinole.h"

/*
 * Duplicated OleUninitialize() call causes GPF. So, if a few OLE libraries
 * is used inside Harbour code, you can expect GPF on application exit.
 * This code does not implement any OLE interface except initialization. It is
 * have to be used from all other OLE libraries. [Mindaugas]
 */

static int s_iOleInit = 0;

static void hb_ole_exit( void* cargo )
{
   HB_SYMBOL_UNUSED( cargo );

   if( s_iOleInit )
   {
#if defined( HB_OS_WIN_CE )
      CoUninitialize();
#else
      OleUninitialize();
#endif
      s_iOleInit = 0;
   }
}

HB_BOOL hb_oleInit( void )
{
   HB_BOOL fResult = HB_TRUE;

   if( ! s_iOleInit )
   {
#if defined( HB_OS_WIN_CE )
      fResult = CoInitializeEx( NULL, COINIT_APARTMENTTHREADED ) == S_OK;
#else
      fResult = OleInitialize( NULL ) == S_OK;
#endif
      if( fResult )
      {
         hb_vmAtQuit( hb_ole_exit, NULL );
         s_iOleInit++;
      }
   }
   else
      s_iOleInit++;

   return fResult;
}