dyldSharedLibraryLoader.cpp

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/*******************************************************************************
* Copyright (C) 2005, Vintela, Inc. All rights reserved.
* Copyright (C) 2006, Novell, Inc. All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 
*     * Redistributions of source code must retain the above copyright notice,
*       this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of 
*       Vintela, Inc., 
*       nor Novell, Inc., 
*       nor the names of its contributors or employees may be used to 
*       endorse or promote products derived from this software without 
*       specific prior written permission.
* 
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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#include "blocxx/BLOCXX_config.h"
#if defined(BLOCXX_USE_DYLD)
#include "blocxx/dyldSharedLibraryLoader.hpp"
#include "blocxx/dyldSharedLibrary.hpp"
#include "blocxx/Format.hpp"
 
namespace BLOCXX_NAMESPACE
{
 
namespace
{
   String COMPONENT_NAME("blocxx.dyldSharedLibraryLoader");
}
 
std::ostream& operator<<(std::ostream& o, NSObjectFileImageReturnCode code)
{
#define SIMPLE_NSOBJ_CASE(X) case X: o << ""#X
   switch (code)
   {
      SIMPLE_NSOBJ_CASE(NSObjectFileImageFailure);
      break;
      SIMPLE_NSOBJ_CASE(NSObjectFileImageSuccess);
      break;
      SIMPLE_NSOBJ_CASE(NSObjectFileImageInappropriateFile);
      break;
      SIMPLE_NSOBJ_CASE(NSObjectFileImageArch);
      break;
      SIMPLE_NSOBJ_CASE(NSObjectFileImageFormat);
      break;
      SIMPLE_NSOBJ_CASE(NSObjectFileImageAccess);
      break;
   }
#undef SIMPLE_NSOBJ_CASE
   return o;
}
 
SharedLibraryRef
dyldSharedLibraryLoader::loadSharedLibrary(const String& filename) const
{
   Logger logger(COMPONENT_NAME);
   BLOCXX_LOG_DEBUG2(logger, Format("Load request for %1 received.", filename));
   NSObjectFileImage image = 0;
   NSObjectFileImageReturnCode dsoerr = NSCreateObjectFileImageFromFile(filename.c_str(), &image);
   const char* err_msg = NULL;
   NSModule libhandle = NULL; 
 
   if (dsoerr == NSObjectFileImageSuccess)
   {
      libhandle = NSLinkModule(image, filename.c_str(), NSLINKMODULE_OPTION_RETURN_ON_ERROR | NSLINKMODULE_OPTION_PRIVATE);      
      if (!libhandle)
      {
         NSLinkEditErrors errors;
         int errorNumber;
         const char *fileName;
         NSLinkEditError(&errors, &errorNumber, &fileName, &err_msg);
      }
      NSDestroyObjectFileImage(image);
   }
   else
   {
      err_msg = "cannot create object file image";
      BLOCXX_LOG_ERROR(logger, Format("NSCreateObject: %1 failed with error %2",
                                          filename, dsoerr));
   }
 
 
 
   if (libhandle)
   {
      try
      {
         return SharedLibraryRef( new dyldSharedLibrary(libhandle,
                                                                               filename));
      }
      catch (...)
      {
         NSUnLinkModule(libhandle, FALSE);
         throw;
      }
   }
   else
   {
      BLOCXX_LOG_ERROR(logger, Format("dyldSharedLibraryLoader::loadSharedLibrary:"
                                          " %1", err_msg));
      return SharedLibraryRef( 0 );
   }
}
SharedLibraryLoaderRef
SharedLibraryLoader::createSharedLibraryLoader()
{
   return SharedLibraryLoaderRef(new dyldSharedLibraryLoader);
}
dyldSharedLibraryLoader::~dyldSharedLibraryLoader()
{
}
 
} // end namespace BLOCXX_NAMESPACE
 
#endif // #if defined(BLOCXX_USE_DYLD)