library.h

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/***************************************************************************
 *   Copyright (C) 2008 by Kutumov Alexey                                  *
 *   ru.pixel@gmail.com                                                    *
 *                                                                         *
 *   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.             *
 ***************************************************************************/

#ifndef __library__header__
#define __library__header__

#include "gpucalc/object.h"

#if PLATFORM == PLATFORM_LINUX

#define LIBRARY_HANDLE void *
#define LIBRARY_LOAD(a) dlopen(a, RTLD_LAZY | RTLD_GLOBAL)
#define LIBRARY_GETSYM(a, b) dlsym(a, b)
#define LIBRARY_UNLOAD(a) dlclose(a)

#elif PLATFORM == PLATFORM_WIN32

#define LIBRARY_HANDLE hInstance
#define LIBRARY_LOAD( a ) LoadLibraryA( a )
#define LIBRARY_GETSYM( a, b ) GetProcAddress( a, b )
#define LIBRARY_UNLOAD( a ) !FreeLibrary( a )

struct HINSTANCE__;
typedef struct HINSTANCE__* hInstance;

#elif PLATFORM == PLATFORM_APPLE

#define LIBRARY_HANDLE CFBundleRef
#define LIBRARY_LOAD( a ) mac_loadExeBundle( a )
#define LIBRARY_GETSYM( a, b ) mac_getBundleSym( a, b )
#define LIBRARY_UNLOAD( a ) mac_unloadExeBundle( a )

#endif

namespace gpucalc
{


 const char _LibraryClassName [] = "Library";


 class _GpuCalcExport Library: public Object
 {


  OBJ_DISABLE_COPY(Library)
  
  
  public:
   Library(const std::string & LibraryName):
    Object(_LibraryClassName, LibraryName), mhInst(0), mIsLoaded(false)
   {
   }


   ~Library()
   {
    if (mIsLoaded)
    {
     unload();
    }
   }


   void load();


   void unload();


   bool isLoaded() const
   {
    return mIsLoaded;
   }


   LIBRARY_HANDLE getSymbol(const std::string & SymbolName) const;

  
  private:
   LIBRARY_HANDLE mhInst;


   std::string libraryError() const;


   bool mIsLoaded;
 };
}

#endif