ext-boost/boost/intrusive/detail/size_holder.hpp
2014-12-28 01:22:08 -02:00

81 lines
1.6 KiB
C++

/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2014-2014
//
// 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/intrusive for documentation.
//
/////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP
#define BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP
#if defined(_MSC_VER)
# pragma once
#endif
namespace boost {
namespace intrusive {
namespace detail {
template<bool ConstantSize, class SizeType, class Tag = void>
struct size_holder
{
static const bool constant_time_size = ConstantSize;
typedef SizeType size_type;
SizeType get_size() const
{ return size_; }
void set_size(SizeType size)
{ size_ = size; }
void decrement()
{ --size_; }
void increment()
{ ++size_; }
void increase(SizeType n)
{ size_ += n; }
void decrease(SizeType n)
{ size_ -= n; }
SizeType size_;
};
template<class SizeType, class Tag>
struct size_holder<false, SizeType, Tag>
{
static const bool constant_time_size = false;
typedef SizeType size_type;
size_type get_size() const
{ return 0; }
void set_size(size_type)
{}
void decrement()
{}
void increment()
{}
void increase(SizeType)
{}
void decrease(SizeType)
{}
};
} //namespace detail{
} //namespace intrusive{
} //namespace boost{
#endif //BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP