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/*
* Copyright (C) 2007-2008 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_SHARED_CORE_H
#define BU_SHARED_CORE_H
#include "bu/util.h"
#include "bu/sio.h"
namespace Bu
{
template<typename Core>
class SharedCore
{
typedef class SharedCore<Core> _SharedType;
public:
SharedCore() :
data( new Core ),
iRefCount( new int(1) )
{
}
SharedCore( const _SharedType &rSrc ) :
data( NULL ),
iRefCount( NULL )
{
_softCopy( rSrc );
}
virtual ~SharedCore()
{
_deref();
}
SharedCore &operator=( const SharedCore &rhs )
{
_softCopy( rhs );
return *this;
}
int getRefCount() const
{
return *iRefCount;
}
protected:
Core *data;
void _hardCopy()
{
if( !data || !iRefCount )
return;
sio << "_hardCopy()" << sio.nl;
Core *copy = new Core( *data );
_deref();
data = copy;
iRefCount = new int( 1 );
}
private:
void _deref()
{
sio << "_deref()" << sio.nl;
if( (--(*iRefCount)) == 0 )
{
sio << " --> iRefCount == 0, cleaning up." << sio.nl;
delete data;
delete iRefCount;
}
else
sio << " --> iRefCount == " << *iRefCount << sio.nl;
data = NULL;
iRefCount = NULL;
}
void _incRefCount()
{
sio << "_incRefCount()" << sio.nl;
if( iRefCount && data )
++(*iRefCount);
sio << " --> iRefCount == " << *iRefCount << sio.nl;
}
void _softCopy( const _SharedType &rSrc )
{
sio << "_softCopy()" << sio.nl;
if( data )
_deref();
data = rSrc.data;
iRefCount = rSrc.iRefCount;
_incRefCount();
}
int *iRefCount;
};
};
#endif
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