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// file : Utility/ReferenceCounting/Interface.hpp
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2002-2003 Boris Kolpackov
// license : http://kolpackov.net/license.html
#ifndef UTILITY_REFERENCE_COUNTING_INTERFACE_HPP
#define UTILITY_REFERENCE_COUNTING_INTERFACE_HPP
#include "Utility/ExH/Compound.hpp"
#include "Utility/ExH/System/Exception.hpp"
#include "Utility/ExH/Logic/Exception.hpp"
#include "Utility/ExH/Logic/DescriptiveException.hpp"
namespace Utility
{
namespace ReferenceCounting
{
// Interface to a reference-countable object. Note that _remove_ref ()
// member function has a no-throw semantic. Even though it can lead to
// a diagnostic loss it was made no-throw because it has a destructor
// semantic.
class Interface
{
public:
typedef
unsigned long
count_t;
typedef
ExH::System::Exception
SystemException;
class Exception_ {};
typedef
ExH::Compound<Exception_, ExH::Logic::DescriptiveException>
Exception;
public:
virtual void
add_ref () const throw (Exception, SystemException) = 0;
virtual void
remove_ref () const throw () = 0;
virtual count_t
refcount_value () const throw (Exception, SystemException) = 0;
protected:
Interface () throw ();
virtual
~Interface () throw ();
protected:
virtual void
add_ref_i () const throw (Exception, SystemException) = 0;
virtual bool
remove_ref_i () const throw (Exception, SystemException) = 0;
virtual count_t
refcount_value_i () const throw (Exception, SystemException) = 0;
private:
// Copy semanic is not supported.
Interface (Interface const&) throw ();
Interface&
operator= (Interface const&) throw ();
};
template <typename Type>
Type*
add_ref (Type* ptr)
throw (Interface::Exception, Interface::SystemException);
}
}
#include "Utility/ReferenceCounting/Interface.tpp"
#include "Utility/ReferenceCounting/Interface.ipp"
#endif // UTILITY_REFERENCE_COUNTING_INTERFACE_HPP
//$Id$
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