+++ /dev/null
-/*! ========================================================================
-** Extended Template Library
-**
-** $Id$
-**
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-** General Public License for more details.
-**
-** === N O T E S ===========================================================
-**
-** This is an internal header file, included by other ETL headers.
-** You should not attempt to use it directly.
-**
-** ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __ETL_REF_COUNT_H
-#define __ETL_REF_COUNT_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "_curve_func.h"
-#include <cassert>
-
-/* === M A C R O S ========================================================= */
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-_ETL_BEGIN_NAMESPACE
-
-class weak_reference_counter;
-
-// ========================================================================
-/*! \class reference_counter _ref_count.h ETL/ref_count
-** \brief Reference counter
-** \see weak_reference_counter
-** \writeme
-*/
-class reference_counter
-{
- friend class weak_reference_counter;
-private:
- int* counter_;
-public:
-
- reference_counter(const bool &x=true):counter_(x?new int(1):0) { }
-
- reference_counter(const reference_counter &x):counter_(x.counter_)
- { if(counter_) (*counter_)++; }
-
- reference_counter(const weak_reference_counter &x);
-
- ~reference_counter() { detach(); }
-
- reference_counter& operator=(const reference_counter &rhs)
- {
- detach();
- counter_=rhs.counter_;
- if(counter_)
- {
- assert(*counter_>0);
- (*counter_)++;
- }
- return *this;
- }
-
- void detach()
- {
- if(counter_)
- {
- assert(*counter_>0);
- if(!--(*counter_))
- delete counter_;
- counter_=0;
- }
- }
-
- void reset()
- {
- detach();
- counter_=new int(1);
- }
-
- int count()const { return counter_?*counter_:0; }
-
- bool unique()const { return counter_?*counter_==1:0; }
-
- operator int()const { return count(); }
-}; // END of class reference_counter
-
-// ========================================================================
-/*! \class weak_reference_counter _ref_count.h ETL/ref_count
-** \brief Weak Reference counter
-** \see reference_counter
-** \writeme
-*/
-class weak_reference_counter
-{
- friend class reference_counter;
-private:
- int* counter_;
-public:
- weak_reference_counter():counter_(0) { }
-
- weak_reference_counter(const weak_reference_counter &x):counter_(x.counter_) { }
-
- weak_reference_counter(const reference_counter &x):counter_(x.counter_) { }
-
- ~weak_reference_counter() { }
-
- weak_reference_counter& operator=(const reference_counter &rhs)
- {
- counter_=rhs.counter_;
- assert(*counter_>0);
- return *this;
- }
-
- weak_reference_counter& operator=(const weak_reference_counter &rhs)
- {
- counter_=rhs.counter_;
- assert(*counter_>0);
- return *this;
- }
-
- void detach() { counter_=0; }
-
- int count()const { return counter_?*counter_:0; }
-
- bool unique()const { return counter_?*counter_==1:0; }
-
- operator int()const { return count(); }
-}; // END of class weak_reference_counter
-
-inline reference_counter::reference_counter(const weak_reference_counter &x):
- counter_(x.counter_)
-{
- if(counter_) (*counter_)++;
-}
-
-_ETL_END_NAMESPACE
-
-/* === E X T E R N S ======================================================= */
-
-/* === E N D =============================================================== */
-
-#endif