Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: //
Chris@102: // (C) Copyright Ion Gaztanaga  2014-2014
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0.
Chris@102: //    (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: //          http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // See http://www.boost.org/libs/intrusive for documentation.
Chris@102: //
Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: 
Chris@102: #ifndef BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP
Chris@102: #define BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP
Chris@102: 
Chris@102: #ifndef BOOST_CONFIG_HPP
Chris@102: #  include <boost/config.hpp>
Chris@102: #endif
Chris@102: 
Chris@102: #if defined(BOOST_HAS_PRAGMA_ONCE)
Chris@102: #  pragma once
Chris@102: #endif
Chris@102: 
Chris@102: namespace boost {
Chris@102: namespace intrusive {
Chris@102: namespace detail {
Chris@102: 
Chris@102: template<bool ConstantSize, class SizeType, class Tag = void>
Chris@102: struct size_holder
Chris@102: {
Chris@102:    static const bool constant_time_size = ConstantSize;
Chris@102:    typedef SizeType  size_type;
Chris@102: 
Chris@102:    SizeType get_size() const
Chris@102:    {  return size_;  }
Chris@102: 
Chris@102:    void set_size(SizeType size)
Chris@102:    {  size_ = size; }
Chris@102: 
Chris@102:    void decrement()
Chris@102:    {  --size_; }
Chris@102: 
Chris@102:    void increment()
Chris@102:    {  ++size_; }
Chris@102: 
Chris@102:    void increase(SizeType n)
Chris@102:    {  size_ += n; }
Chris@102: 
Chris@102:    void decrease(SizeType n)
Chris@102:    {  size_ -= n; }
Chris@102: 
Chris@102:    SizeType size_;
Chris@102: };
Chris@102: 
Chris@102: template<class SizeType, class Tag>
Chris@102: struct size_holder<false, SizeType, Tag>
Chris@102: {
Chris@102:    static const bool constant_time_size = false;
Chris@102:    typedef SizeType  size_type;
Chris@102: 
Chris@102:    size_type get_size() const
Chris@102:    {  return 0;  }
Chris@102: 
Chris@102:    void set_size(size_type)
Chris@102:    {}
Chris@102: 
Chris@102:    void decrement()
Chris@102:    {}
Chris@102: 
Chris@102:    void increment()
Chris@102:    {}
Chris@102: 
Chris@102:    void increase(SizeType)
Chris@102:    {}
Chris@102: 
Chris@102:    void decrease(SizeType)
Chris@102:    {}
Chris@102: };
Chris@102: 
Chris@102: }  //namespace detail{
Chris@102: }  //namespace intrusive{
Chris@102: }  //namespace boost{
Chris@102: 
Chris@102: #endif //BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP