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// This may look like C, but it's really -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// ValueFactory.h
//
// = AUTHOR
// Torsten Kuepper <kuepper2@lfa.uni-wuppertal.de>
//
// ============================================================================
#ifndef TAO_VALUEFACTORY_H
#define TAO_VALUEFACTORY_H
#include "ace/pre.h"
#include "tao/corbafwd.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#ifdef TAO_HAS_VALUETYPE
class TAO_Export CORBA_ValueFactoryBase
{
/* friend CORBA::Boolean _tao_unmarshal_pre (TAO_InputCDR &,
CORBA_ValueFactory_ptr &,
CORBA_ValueBase *&,
const char * const);
%! how can I make the friendship work ? (g++) */
public:
CORBA_ValueFactoryBase ();
virtual ~CORBA_ValueFactoryBase ();
// non-standard
virtual const char* tao_repository_id () = 0;
// non-virtual is non-standard
void _add_ref (void);
void _remove_ref (void);
// private: %!
virtual CORBA_ValueBase* create_for_unmarshal (void) = 0;
// In a derived class T use return type TAO_OBV_CREATE_RETURN_TYPE (T)
// (see at definition below)
private:
CORBA::ULong _tao_reference_count_;
ACE_SYNCH_MUTEX _tao_reference_count_lock_;
}; // CORBA_ValueFactoryBase
// Use this macro for writing code that is independend from
// the compiler support of covariant return types of pointers to
// virtual inherited classes.
// (e.g. in egcs-2.90.29 980515 (egcs-1.0.3 release) its not yet implemented)
// (But it is TAO specific and at the moment the covariant case is not
// elaborated --- its just a suggestion.)
#ifdef TAO_HAS_OBV_COVARIANT_RETURN
# define TAO_OBV_CREATE_RETURN_TYPE(TYPE) TYPE *
#else /* TAO_HAS_OBV_COVARIANT_RETURN */
# define TAO_OBV_CREATE_RETURN_TYPE(TYPE) CORBA::ValueBase *
#endif /* TAO_HAS_OBV_COVARIANT_RETURN */
// (The obtaining of the repository id is currently not yet like the OMG way. %!)
//
// Macro for on the fly registration of a factory (with type Factory).
// The repository id is taken from the static repository id of the
// valuetype via tao_repository_id () of the specialized factory.
// It forgets the pre-registered factory (if any) and the reference
// to the newly created one. (A new reference could be obtained with
// orb->lookup_value_factory (char * repo_id) .)
#define TAO_OBV_REGISTER_FACTORY(FACTORY) \
{ CORBA_ValueFactory_ptr factory = new FACTORY; \
CORBA_ValueFactory_ptr prev_factory = \
TAO_ORB_Core_instance ()->orb ()->register_value_factory (\
factory->tao_repository_id (),\
factory); \
if (prev_factory) prev_factory->_remove_ref (); \
factory->_remove_ref (); }
#if defined (__ACE_INLINE__)
# include "tao/ValueFactory.i"
#endif /* __ACE_INLINE__) */
#endif /* TAO_HAS_VALUETYPE */
#include "ace/post.h"
#endif /* TAO_VALUEFACTORY_H */
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