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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTERPROCESS_NULL_INDEX_HPP
#define BOOST_INTERPROCESS_NULL_INDEX_HPP
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/interprocess/detail/config_begin.hpp>
#include <boost/interprocess/detail/workaround.hpp>
#include <boost/interprocess/offset_ptr.hpp>
//!\file
//!Describes a null index adaptor, so that if we don't want to construct
//!named objects, we can use this null index type to save resources.
namespace boost {
namespace interprocess {
//!Null index type
//!used to save compilation time when
//!named indexes are not needed.
template <class MapConfig>
class null_index
{
#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
typedef typename MapConfig::
segment_manager_base segment_manager_base;
#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
public:
typedef int * iterator;
typedef const int * const_iterator;
//!begin() is equal
//!to end()
const_iterator begin() const
{ return const_iterator(0); }
//!begin() is equal
//!to end()
iterator begin()
{ return iterator(0); }
//!begin() is equal
//!to end()
const_iterator end() const
{ return const_iterator(0); }
//!begin() is equal
//!to end()
iterator end()
{ return iterator(0); }
//!Empty constructor
null_index(segment_manager_base *){}
};
}} //namespace boost { namespace interprocess {
#include <boost/interprocess/detail/config_end.hpp>
#endif //#ifndef BOOST_INTERPROCESS_NULL_INDEX_HPP
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