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// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef _IdComponent_H
#define _IdComponent_H
// IdComponent provides a mechanism to handle
// reference counting for an identifier of any HDF5 object.
#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif
class H5_DLLCPP IdComponent {
public:
// Parent classes must reset the current IdComponent copy
// before setting new id to control reference count
void setId( hid_t new_id );
// Pure virtual function so appropriate close function can
// be called by subclasses' for the corresponding object
virtual void p_close() const = 0;
// Creates an object to hold an HDF5 identifier
IdComponent( const hid_t h5_id );
// Copy constructor: makes copy of the original IdComponent object.
IdComponent( const IdComponent& original );
// Gets the value of IdComponent's data member
virtual hid_t getId () const;
// Increment reference counter
void incRefCount();
// Decrement reference counter
void decRefCount();
// Get the reference counter to this identifier
int getCounter();
// Decrements the reference counter then determines if there are no more
// reference to this object
bool noReference();
// Assignment operator
IdComponent& operator=( const IdComponent& rhs );
// Resets this IdComponent instance
//template <class Type>
//void reset( Type* parent );
void reset();
void resetId();
// Destructor
virtual ~IdComponent();
protected:
hid_t id; // HDF5 object id
RefCounter* ref_count; // used to keep track of the
// number of copies of an object
// Default constructor
IdComponent();
}; // end class IdComponent
// BMR - including template member function implementation here to
// prevent compilation errors. When the compilers support template
// member functions in *.C files, move them to IdComponent.C.
// This function makes sure that this IdComponent instance actually
// represents an HDF5 component and that this HDF5 component is no longer
// referenced, then calls the parent function p_close to close the
// appropriate HDF5 component. In addition, this identifier instance
// will delete itself.
// Type is the class of the instance to whom this IdComponent object
// belongs.
/* 11/10/00 - BMR: commented this member function because many compilers
still have no support for member template function. The function is
replaced by resetIdComponent in H5Idtemplates.h
template <class Type>
void IdComponent::reset( Type* parent )
{
if( ref_count->noReference()) // ref_count is decremented here
{
if( id > 0 )
parent->p_close(); // which p_close depends on whom this
// IdComponent object belongs to
delete ref_count; // delete the reference counter
delete this; // this IdComponent object deletes itself
}
}
*/
#ifndef H5_NO_NAMESPACE
}
#endif
#endif
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