library.cpp

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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.             *
 ***************************************************************************/

#include "gpucalc/library.h"
#include "gpucalc/log_manager.h"


#if (PLATFORM == PLATFORM_LINUX)
#include <dlfcn.h>
#endif

#if (PLATFORM == PLATFORM_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

#if (PLATFORM == PLATFORM_APPLE)
#include "macPlugins.h"
#endif




namespace gpucalc
{
 void Library::load()
 {
  std::string name = this->getObjectName();
#  if PLATFORM == PLATFORM_LINUX
  if (name.substr(name.length() - 3, 3) != ".so")
   name += ".so";
#  endif

  mhInst = (LIBRARY_HANDLE)LIBRARY_LOAD(name.c_str());
  if (!mhInst)
  {
   Except<ERR_INTERNAL_ERROR>(this, "Could not load dynamic library \"" + name + "\". System Error: " + libraryError(),
    "DynLib::load", __FILE__, __LINE__);
  }

  LogManager::getSingleton().logMessage(this, "Library loaded.", LML_Trivial);
  mIsLoaded = true;
 }


 void Library::unload()
 {
  if (LIBRARY_UNLOAD(mhInst))
  {
   Except<ERR_INTERNAL_ERROR>(this, "Could not unload dynamic library \"" + this->getObjectName() + "\". System Error: " + libraryError(),
    "DynLib::unload", __FILE__, __LINE__);
  }
  LogManager::getSingleton().logMessage(this, "Library unloaded.", LML_Trivial);
  mIsLoaded = false;
 }
 
 LIBRARY_HANDLE Library::getSymbol(const std::string & SymbolName) const
 {
  LogManager::getSingleton().logMessage(this, "Exporting symbol \"" + SymbolName + "\"...", LML_Trivial);
  return (LIBRARY_HANDLE)LIBRARY_GETSYM(mhInst, SymbolName.c_str());
 }


 std::string Library::libraryError() const
 {
#if PLATFORM == PLATFORM_WIN32
  LPVOID lpMsgBuf;
  FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
   0, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf, 0, 0);
  std::string ret = (char*)lpMsgBuf;
        // Free the buffer.
  LocalFree( lpMsgBuf );
  return ret;
#elif OGRE_PLATFORM == OGRE_PLATFORM_LINUX
  return std::string(dlerror());
#elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE
  return std::string(mac_errorBundle());
#else
  return std::string("");
#endif
 }
}