/usr/include/ngs/adapter/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.
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* Please cite the author in any work or product based on this material.
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* ===========================================================================
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*/
#ifndef _hpp_ngs_adapt_refcount_
#define _hpp_ngs_adapt_refcount_
#ifndef _h_ngs_itf_refcount_
#include <ngs/itf/Refcount.h>
#endif
#ifndef _h_ngs_adapt_defs_
#include <ngs/adapter/defs.h>
#endif
namespace ngs_adapt
{
/*----------------------------------------------------------------------
* OpaqueRefcount
*/
class OpaqueRefcount
{
public:
// interface
virtual void Release ();
virtual void * Duplicate () const;
public:
// C++ support
virtual ~ OpaqueRefcount ();
protected:
// not directly instantiable
OpaqueRefcount ( const OpaqueRefcount & obj );
protected:
// support for C vtable
OpaqueRefcount ( const NGS_VTable * vt );
static NGS_Refcount_v1_vt ivt;
inline void * offset_this ()
{ return ( void* ) & cobj; }
inline const void * offset_this () const
{ return ( const void* ) & cobj; }
static inline void * offset_cobj ( void * obj )
{
char * cobj = ( char* ) obj;
size_t offset = ( size_t ) & ( ( OpaqueRefcount* ) 8 ) -> cobj - 8;
return ( void * ) ( cobj - offset );
}
static inline const void * offset_cobj ( const void * obj )
{
const char * cobj = ( const char* ) obj;
size_t offset = ( size_t ) & ( ( OpaqueRefcount* ) 8 ) -> cobj - 8;
return ( const void * ) ( cobj - offset );
}
private:
static void CC release ( NGS_Refcount_v1 * self, NGS_ErrBlock_v1 * err );
static void * CC duplicate ( const NGS_Refcount_v1 * self, NGS_ErrBlock_v1 * err );
NGS_Refcount_v1 cobj;
private:
// member variables
mutable atomic32_t refcount;
};
/*----------------------------------------------------------------------
* Refcount
*/
template < class T, class C >
class Refcount : protected OpaqueRefcount
{
protected:
Refcount ( const NGS_VTable * vt )
: OpaqueRefcount ( vt )
{
}
public:
inline C * Cast ()
{ return static_cast < C* > ( OpaqueRefcount :: offset_this () ); }
inline const C * Cast () const
{ return static_cast < const C* > ( OpaqueRefcount :: offset_this () ); }
// assistance for C objects
static inline T * Self ( C * obj )
{ return static_cast < T* > ( OpaqueRefcount :: offset_cobj ( obj ) ); }
static inline const T * Self ( const C * obj )
{ return static_cast < const T* > ( OpaqueRefcount :: offset_cobj ( obj ) ); }
};
} // namespace ngs_adapt
#endif // _hpp_ngs_adapt_refcount_
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