Datatype.h

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/*
   For more information, please see: http://software.sci.utah.edu

   The MIT License

   Copyright (c) 2009 Scientific Computing and Imaging Institute,
   University of Utah.

   
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///
///@file  Datatype.h
///@brief The Datatype Data type
///
///@author
///       David Weinstein
///       Department of Computer Science
///       University of Utah
///@date  July 1994
///
///

#ifndef CORE_DATATYPES_DATATYPE_H
#define CORE_DATATYPES_DATATYPE_H 1

#include <boost/type_traits.hpp>
#include <Core/Persistent/Persistent.h>
#include <Core/Thread/UsedWithLockingHandle.h>
#include <Core/Containers/LockingHandle.h>
#include <Core/Thread/RecursiveMutex.h>

#include <Core/Datatypes/share.h>

namespace SCIRun {

class SCISHARE Datatype : public Persistent, public UsedWithLockingHandle<RecursiveMutex>
{
public:
  /// unique id for each instance
  int generation;
  Datatype();
  Datatype(const Datatype&);
  Datatype& operator=(const Datatype&);
  virtual ~Datatype();

  virtual std::string dynamic_type_name() const = 0;

  static int compute_new_generation();
};

typedef LockingHandle<Datatype> DatatypeHandle;

#ifdef APPLE_LEOPARD_OR_SNOW_LEOPARD

#define SCI_DATATYPE_CAST sci_datatype_cast

#else

#define SCI_DATATYPE_CAST dynamic_cast

#endif

template <typename TPtr>
TPtr sci_datatype_cast(Datatype* handle)
{
  if (! handle)
    return 0;

  const std::string realType = handle->dynamic_type_name();

  typedef typename boost::remove_pointer<TPtr>::type return_type;
  const std::string returnType = return_type::type_id.type;

  if (Persistent::is_base_of(returnType, realType))
    return static_cast<TPtr>(handle);

  return 0;
}

} // End namespace SCIRun


#endif /* SCI_project_Datatype_h */