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// file : Utility/ReferenceCounting/DefaultImpl.hpp
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2002-2003 Boris Kolpackov
// license : http://kolpackov.net/license.html
#ifndef UTILITY_REFERENCE_COUNTING_DEFAULT_IMPL_HPP
#define UTILITY_REFERENCE_COUNTING_DEFAULT_IMPL_HPP
#include "Utility/ExH/Compound.hpp"
#include "Utility/ExH/Logic/DescriptiveException.hpp"
#include "Utility/Synch/Policy/Null.hpp"
#include "Utility/ReferenceCounting/Interface.hpp"
namespace Utility
{
namespace ReferenceCounting
{
// Default reference counter implementation with parameterised
// synchronization policy. It is assumed that none of the SynchPolicy
// types throw any logic exceptions. If in fact they do then these
// exceptions won't be handled and will be automatically converted
// to system exceptions.
template <typename SynchPolicy = Utility::Synch::Policy::Null>
class DefaultImpl : public virtual Interface
{
public:
class InconsistentState_ {};
typedef
ExH::Compound<InconsistentState_, Exception>
InconsistentState;
public:
DefaultImpl () throw (SystemException);
virtual
~DefaultImpl () throw ();
public:
virtual void
add_ref () const throw (Exception, SystemException);
virtual void
remove_ref () const throw ();
virtual count_t
refcount_value () const throw (Exception, SystemException);
protected:
virtual void
add_ref_i () const throw (Exception, SystemException);
virtual bool
remove_ref_i () const throw (Exception, SystemException);
virtual count_t
refcount_value_i () const throw (Exception, SystemException);
typename SynchPolicy::Mutex&
lock_i () const throw ();
protected:
typedef
typename SynchPolicy::Mutex
Mutex_;
typedef
typename SynchPolicy::ReadGuard
ReadGuard_;
typedef
typename SynchPolicy::WriteGuard
WriteGuard_;
protected:
mutable count_t ref_count_;
private:
mutable Mutex_ lock_;
private:
// Copy semanic is not supported.
DefaultImpl (DefaultImpl const&) throw ();
DefaultImpl&
operator= (DefaultImpl const&) throw ();
};
}
}
#include "Utility/ReferenceCounting/DefaultImpl.ipp"
#endif // UTILITY_REFERENCE_COUNTING_DEFAULT_IMPL_HPP
//$Id$
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