/*=========================================================================
                                                                                
Program:   bbtk
Module:    $RCSfile: bbtkDynamicLibraryHandling.h,v $
Language:  C++

Date:      $Date: 2008/01/22 15:02:00 $
Version:   $Revision: 1.1.1.1 $
                                                                                

Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See doc/license.txt or
http://www.creatis.insa-lyon.fr/Public/bbtk/License.html for details.

This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
/**
 *\file
 *\brief Dynamic library loading stuff (OS dependent)
 */

// System dependent includes for loading dynamic libraries
#if defined(__GNUC__)
// GCC compiler

// dlopen, dlsym, etc.
#include <dlfcn.h>

// dlopen loading mode : 
// instant/delayed symbol resolution
#ifndef BBTK_RTLD_NOW
#  define BBTK_RTLD_TIME RTLD_LAZY
#else
#  define BBTK_RTLD_TIME RTLD_NOW
#endif
// local/global symbol loading
// one **MUST** use RTLD_GLOBAL in order to have 
// the RTTI mechanism travel correctly across packages (typeid,dynamic_cast...)
// however this can cause problems (symbol clashes) ...
// see :
// http://gcc.gnu.org/faq.html#dso
// http://gcc.gnu.org/ml/gcc/2003-04/msg00256.html
// http://gcc.gnu.org/ml/gcc-bugs/2003-10/msg02771.html
#ifndef BBTK_RTLD_LOCAL
#  define BBTK_RTLD_SCOPE RTLD_GLOBAL
#else 
#  define BBTK_RTLD_SCOPE RTLD_LOCAL
#endif

// dl handler type
namespace bbtk 
{
  typedef void* DynamicLibraryHandler;
}

#elif defined(_WIN32)
// Win32
// HINSTANCE, LoadLibrary, etc. definition
#include "Windows.h"
// dl handler type
namespace bbtk 
{
  typedef HINSTANCE DynamicLibraryHandler;
}

#else

ERROR !! DYNAMIC LIBRARY LOADING NOT IMPLEMENTED FOR YOUR SYSTEM

#endif