/usr/include/ngs/itf/Refcount.hpp is in libngs-sdk-dev 1.3.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* PUBLIC DOMAIN NOTICE
* National Center for Biotechnology Information
*
* This software/database is a "United States Government Work" under the
* terms of the United States Copyright Act. It was written as part of
* the author's official duties as a United States Government employee and
* thus cannot be copyrighted. This software/database is freely available
* to the public for use. The National Library of Medicine and the U.S.
* Government have not placed any restriction on its use or reproduction.
*
* Although all reasonable efforts have been taken to ensure the accuracy
* and reliability of the software and data, the NLM and the U.S.
* Government do not and cannot warrant the performance or results that
* may be obtained by using this software or data. The NLM and the U.S.
* Government disclaim all warranties, express or implied, including
* warranties of performance, merchantability or fitness for any particular
* purpose.
*
* Please cite the author in any work or product based on this material.
*
* ===========================================================================
*
*/
#ifndef _hpp_ngs_itf_refcount_
#define _hpp_ngs_itf_refcount_
#ifndef _hpp_ngs_itf_error_msg_
#include <ngs/itf/ErrorMsg.hpp>
#endif
#ifndef _h_ngs_itf_defs_
#include <ngs/itf/defs.h>
#endif
struct NGS_Refcount_v1;
namespace ngs
{
/*----------------------------------------------------------------------
* OpaqueRefcount
*/
class OpaqueRefcount
{
public:
void Release ()
throw ();
void * Duplicate () const
throw ( ErrorMsg );
private:
OpaqueRefcount ();
NGS_Refcount_v1 * Self ();
const NGS_Refcount_v1 * Self () const;
};
/*----------------------------------------------------------------------
* Refcount
*/
template < class T, class C >
class Refcount : protected OpaqueRefcount
{
public:
inline
void Release ()
throw ()
{
OpaqueRefcount :: Release ();
}
inline
T * Duplicate () const
throw ( ErrorMsg )
{
return static_cast < T* > ( OpaqueRefcount :: Duplicate () );
}
protected:
// type-punning casts from C++ to C object
inline C * Self ()
{ return reinterpret_cast < C* > ( this ); }
inline const C * Self () const
{ return reinterpret_cast < const C* > ( this ); }
// test "this" pointer for NULL
inline C * Test ()
{
if ( this == 0 )
throw ErrorMsg ( "message sent to NULL object" );
return Self ();
}
inline const C * Test () const
{
if ( this == 0 )
throw ErrorMsg ( "message sent to NULL object" );
return Self ();
}
public:
// type-punning cast from C object to C++
static inline T * Cast ( C * cobj )
{ return reinterpret_cast < T* > ( cobj ); }
static inline const T * Cast ( const C * cobj )
{ return reinterpret_cast < const T* > ( cobj ); }
};
} // namespace ngs
#endif // _hpp_ngs_itf_refcount_
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