77 lines
3.4 KiB
C++
77 lines
3.4 KiB
C++
/************************************************************************/
|
|
/* */
|
|
/* Centre for Speech Technology Research */
|
|
/* University of Edinburgh, UK */
|
|
/* Copyright (c) 1996,1997 */
|
|
/* All Rights Reserved. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to use and distribute */
|
|
/* this software and its documentation without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of this work, and to */
|
|
/* permit persons to whom this work is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* 1. The code must retain the above copyright notice, this list of */
|
|
/* conditions and the following disclaimer. */
|
|
/* 2. Any modifications must be clearly marked as such. */
|
|
/* 3. Original authors' names are not deleted. */
|
|
/* 4. The authors' names are not used to endorse or promote products */
|
|
/* derived from this software without specific prior written */
|
|
/* permission. */
|
|
/* */
|
|
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
|
|
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
|
|
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
|
|
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
|
|
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
|
|
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
|
|
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
|
|
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
|
|
/* THIS SOFTWARE. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
#ifndef __EST_HANDLABLE_H__
|
|
#define __EST_HANDLABLE_H__
|
|
|
|
/** Reference Counting Interface.
|
|
*
|
|
* This simple class does most of the things an object which is to be
|
|
* manipulated by EST_THandle style smart pointers needs to provide.
|
|
*
|
|
* @see EST_THandle
|
|
* @see EST_TBox
|
|
* @see EST_TrackMap
|
|
* @author Richard Caley <rjc@cstr.ed.ac.uk>
|
|
* @version $Id: EST_Handleable.h,v 1.4 2004/09/29 08:24:17 robert Exp $
|
|
*/
|
|
|
|
#include <climits>
|
|
|
|
using namespace std;
|
|
|
|
class EST_Handleable
|
|
{
|
|
private:
|
|
int p_refcount;
|
|
|
|
public:
|
|
# define NOT_REFCOUNTED (INT_MAX)
|
|
|
|
EST_Handleable(void) { p_refcount=NOT_REFCOUNTED; }
|
|
|
|
int refcount(void) const { return p_refcount;}
|
|
|
|
void start_refcounting(int initial=0) {p_refcount=initial;}
|
|
void inc_refcount(void) {if (p_refcount!=NOT_REFCOUNTED) p_refcount++;}
|
|
void dec_refcount(void) {if (p_refcount!=NOT_REFCOUNTED) p_refcount--;}
|
|
|
|
int is_unreferenced(void) const {return p_refcount == 0;}
|
|
int is_refcounted(void) const {return p_refcount!= NOT_REFCOUNTED;}
|
|
//@}
|
|
};
|
|
|
|
#endif
|
|
|