#include <cpPlugins/OS/DLLManager.h>

#ifdef cpPlugins_OS_Windows
#  include <Windows.h>
#else // cpPlugins_OS_Windows
#  include <dlfcn.h>
#endif // cpPlugins_OS_Windows

// -------------------------------------------------------------------------
void* cpPlugins::OS::DLLManager::
Load( const std::string& fname, std::string& error )
{
  void* hnd = NULL;
#ifdef cpPlugins_OS_Windows
  UINT old = ::SetErrorMode( SEM_FAILCRITICALERRORS );
  ::SetErrorMode( old | SEM_FAILCRITICALERRORS );
  hnd = ::LoadLibraryA( fname.c_str( ) );
  ::SetErrorMode( old );
  if( hnd == NULL )
    error = "Could not load library.";
#else // cpPlugins_OS_Windows
  hnd = dlopen( fname.c_str( ), RTLD_LAZY | RTLD_GLOBAL );
  if( hnd == NULL )
    error = dlerror( );
  else
    dlerror( );
#endif // cpPlugins_OS_Windows
  return( hnd );
}

// -------------------------------------------------------------------------
void cpPlugins::OS::DLLManager::
UnLoad( void* hnd )
{
#ifdef cpPlugins_OS_Windows
  ::FreeLibrary( ( HMODULE )hnd );
#else // cpPlugins_OS_Windows
  dlclose( hnd );
#endif // cpPlugins_OS_Windows
}

// -------------------------------------------------------------------------
void* cpPlugins::OS::DLLManager::
GetFunctionHandle( void* hnd, const std::string& function )
{
  void* f = NULL;
  if( hnd != NULL )
  {
#ifdef cpPlugins_OS_Windows
    f = ::GetProcAddress( ( HMODULE )hnd, function.c_str( ) );
#else // cpPlugins_OS_Windows
    f = dlsym( hnd, function.c_str( ) );
#endif // cpPlugins_OS_Windows
  } // fi
  return( f );
}

// eof - $RCSfile$