/usr/include/BoxLib/UseCount.H is in libbox-dev 2.5-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** (c) 1996-2000 The Regents of the University of California (through
** E.O. Lawrence Berkeley National Laboratory), subject to approval by
** the U.S. Department of Energy. Your use of this software is under
** license -- the license agreement is attached and included in the
** directory as license.txt or you may contact Berkeley Lab's Technology
** Transfer Department at TTD@lbl.gov. NOTICE OF U.S. GOVERNMENT RIGHTS.
** The Software was developed under funding from the U.S. Government
** which consequently retains certain rights as follows: the
** U.S. Government has been granted for itself and others acting on its
** behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, and perform publicly
** and display publicly. Beginning five (5) years after the date
** permission to assert copyright is obtained from the U.S. Department of
** Energy, and subject to any subsequent five (5) year renewals, the
** U.S. Government is granted for itself and others acting on its behalf
** a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, distribute copies to
** the public, perform publicly and display publicly, and to permit
** others to do so.
*/
#ifndef BL_USECOUNT_H
#define BL_USECOUNT_H
//
// $Id: UseCount.H,v 1.13 2001/07/31 22:43:19 lijewski Exp $
//
#include <BLassert.H>
#include <BoxLib.H>
//
//@Man:
//@Memo: A Class Encapsulating Reference Counts
/*@Doc:
This class encapsulates reference counts.
*/
class UseCount
{
public:
//
//@ManDoc: Construct a UseCount initialized to one.
//
UseCount ();
//
//@ManDoc: The copy constructor -- bumps reference count.
//
UseCount (const UseCount& rhs);
/*@ManDoc: The assignment operator. Increments the reference count on
rhs, decrements the reference count on this, and then makes
this and rhs point to the same reference count.
*/
UseCount& operator= (const UseCount& rhs);
//
//@ManDoc: The destructor -- decrements the reference count.
//
~UseCount ();
//
//@ManDoc: The UseCount is unique if the reference count == 1.
//
bool unique () const;
//
//@ManDoc: Returns the reference count.
//
int linkCount () const;
private:
//
// A pointer to the reference count.
//
unsigned int* cnt;
//
// Decrement the reference count and delete the reference
// counter if there are no more references.
//
void decrement ();
};
inline
bool
UseCount::unique () const
{
return *cnt == 1;
}
inline
int
UseCount::linkCount () const
{
return *cnt;
}
#endif /*BL_USECOUNT_H*/
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