gcounter.h

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//
// Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
// 
// This program 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 3 of the License, or
// (at your option) any later version.
// 
// This program 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.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// ===

#ifndef G_OBJECT_COUNTER_H
#define G_OBJECT_COUNTER_H

#include "gdef.h"
#include "gdebug.h"

namespace G
{
        class CounterImp ;
}

class G::CounterImp 
{
public: 
        static void check( const char * class_name , unsigned long n ) ;
} ;

namespace G
{

template <typename D, const char * C>
class Counter : private CounterImp 
{
public:
        Counter() ;

        ~Counter() ;

        Counter( const Counter<D,C> & ) ;

        void operator=( const Counter<D,C> & ) ;

private:
        static unsigned long m_n ;
} ;

template <typename D, const char * C>
unsigned long Counter<D,C>::m_n = 0UL ;

template <typename D, const char * C>
Counter<D,C>::Counter()
{
        m_n++ ;
        check( C , m_n ) ;
}

template <typename D, const char * C>
Counter<D,C>::~Counter()
{
        m_n-- ;
        check( C , m_n ) ;
}

template <typename D, const char * C>
Counter<D,C>::Counter( const Counter<D,C> & )
{
        m_n++ ;
        check( C , m_n ) ;
}

template <typename D, const char * C>
void Counter<D,C>::operator=( const Counter<D,C> & )
{
}

}

#endif