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/*
* $Header: /home/dscott/nasty/memory/refcount.h,v 1.1 2001/11/06 21:48:51 dscott Exp $
* $NoKeywords: $
*/
#ifndef REFCOUNT_H_
#define REFCOUNT_H_ 1
#include <autohndl.h>
class base_ref_counted
{
public:
base_ref_counted()
: pCount_(new unsigned int(1))
{}
base_ref_counted(const base_ref_counted& that)
: pCount_(that.pCount_)
{
++*pCount_;
}
virtual ~base_ref_counted()
{
if (--*pCount_ == 0)
{ delete pCount_; }
}
base_ref_counted& operator=(
const base_ref_counted& rhs)
{
base_ref_counted tmp(rhs);
this->swap(tmp);
return *this;
}
void swap(base_ref_counted& that) throw()
{ std::swap(pCount_, that.pCount_); }
unsigned int get_count() const
{ return *pCount_; }
private:
unsigned int* pCount_;
};
// A reference counted class,
// can be used as alternate base
// of auto_handle (instead of
// base_handle)
template<class H,
class T = handle_traits<H> >
class ref_counted : public base_ref_counted
{
public:
void dispose(H h) throw()
{
if (get_count() == 1)
{ T::dispose(h); }
}
static H copy(H& h) throw()
{ return h; }
};
#endif//REFCOUNT_H_
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