/home/mhx/git/github/libmoost/include/moost/pdl/dynamic_class.h

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/* vim:set ts=3 sw=3 sts=3 et: */
#ifndef MOOST_PDL_DYNAMIC_CLASS_H__
#define MOOST_PDL_DYNAMIC_CLASS_H__

#include <boost/shared_ptr.hpp>
#include <boost/noncopyable.hpp>

#include "platform.h"

namespace moost { namespace pdl {

class dynamic_library;
class dynamic_library_if;

class dynamic_class : public boost::noncopyable
{
   // We have to be friends with dynamic_library so that m_library can
   // be accessed.
   friend class dynamic_library;

public:
   virtual ~dynamic_class();

private:
   // This reference is used to manage the lifetime of a loaded shared
   // library. Once the last reference to a shared library is gone, the
   // shared library will be unloaded.
   boost::shared_ptr<dynamic_library_if> m_library;
};

}}

#define PDL_EXPORT_DYNAMIC_CLASS(class_name) \
   extern "C" PDL_DECL_EXPORT ::moost::pdl::dynamic_class *PDL_create_ ## class_name() \
   {                                \
      try                           \
      {                             \
         return new class_name();   \
      }                             \
      catch (...)                   \
      {                             \
      }                             \
      return 0;                     \
   }

#endif