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// Epetra: Linear Algebra Services Package
// Copyright 2011 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// this software without specific prior written permission.
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*/
#ifndef EPETRA_DATA_H
#define EPETRA_DATA_H
#include "Epetra_ConfigDefs.h"
//! Epetra_Data: The Epetra Base Data Class.
/*! The Epetra_Data class is a base class for all Epetra Data Classes.
It provides a mechanism so that one data object can be shared by multiple
class instances. However, it is meant only to be used internally by
another Epetra class. It does not provide smart pointer like capabilities.
Incrementing and decrementing the reference count, and deleting the
data class instance (if necessary), are duties of the Epetra class
utilizing Epetra_Data.
All of Epetra_Data's methods are protected. This is because Epetra_Data
should never be used directly. Rather, a class that derives from
Epetra_Data should be used instead. For example, Epetra_MpiCommData or
Epetra_BlockMapData.
DEVELOPER NOTES:
(1) Any class that inherits from Epetra_Data may need to define an
assignment operator, if it adds pointers. Epetra_Data doesn't have any,
and so the default (compiler-generated) assignment operator is good enough.
(2) The behavior of a derived class is left up to the
implementer(s) of that class. As such, it cannot be assumed that
just because a class inherits from Epetra_Data, that it supports copy
construction or assignment, or that it will perform as expected.
*/
class EPETRA_LIB_DLL_EXPORT Epetra_Data {
protected:
//! @name Constructor/Destructor Methods
//@{
//! Epetra_Data Serial Constructor.
Epetra_Data();
//! Epetra_Data Copy Constructor.
/*! Reference count will be set to 1 on new instance.*/
Epetra_Data(const Epetra_Data & Data);
//! Epetra_Data Destructor.
virtual ~Epetra_Data();
//@}
//! @name Reference-Counting Methods
//@{
//! Increment reference count
void IncrementReferenceCount();
//! Decrement reference count
void DecrementReferenceCount();
//! Get reference count
int ReferenceCount() const;
//@}
int ReferenceCount_;
};
#endif /* EPETRA_DATA_H */
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