OW_dyldSharedLibraryLoader.cpp

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#include "OW_config.h"
#if defined(OW_USE_DYLD)
#include "OW_dyldSharedLibraryLoader.hpp"
#include "OW_dyldSharedLibrary.hpp"
#include "OW_Format.hpp"

namespace OW_NAMESPACE
{

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 LoggerRef& logger) const
{
   OW_LOG_DEBUG(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 if ((dsoerr == NSObjectFileImageFormat ||
               dsoerr == NSObjectFileImageInappropriateFile) &&
               NSAddLibrary(filename.c_str()) == TRUE)
   {
      OW_LOG_ERROR(logger, Format("NSCreateObject: %1 failed with error \"%2\"",
                                          filename, dsoerr));
      // libhandle = (NSModule)DYLD_LIBRARY_HANDLE;
   }
   else
   {
      err_msg = "cannot create object file image or add library";
      OW_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
   {
      OW_LOG_ERROR(logger, Format("dyldSharedLibraryLoader::loadSharedLibrary:"
                                          " %1", err_msg));
      return SharedLibraryRef( 0 );
   }
}
SharedLibraryLoaderRef
SharedLibraryLoader::createSharedLibraryLoader()
{
   return SharedLibraryLoaderRef(new dyldSharedLibraryLoader);
}
dyldSharedLibraryLoader::~dyldSharedLibraryLoader()
{
}

} // end namespace OW_NAMESPACE

#endif // #if defined(OW_USE_DYLD)

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