ceph/src/boost/libs/move/include/boost/move/detail/destruct_n.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2015-2016.
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // See http://www.boost.org/libs/move for documentation.
   9 //
  10 //////////////////////////////////////////////////////////////////////////////
  11
  12 //! \file
  13
  14 #ifndef BOOST_MOVE_DETAIL_DESTRUCT_N_HPP
  15 #define BOOST_MOVE_DETAIL_DESTRUCT_N_HPP
  16
  17 #ifndef BOOST_CONFIG_HPP
  18 #  include <boost/config.hpp>
  19 #endif
  20 #
  21 #if defined(BOOST_HAS_PRAGMA_ONCE)
  22 #  pragma once
  23 #endif
  24
  25 #include <cstddef>
  26
  27 namespace boost {
  28 namespace movelib{
  29
  30 template<class T>
  31 class destruct_n
  32 {
  33    public:
  34    explicit destruct_n(T *raw)
  35       : m_ptr(raw), m_size()
  36    {}
  37
  38    void incr()
  39    {
  40       ++m_size;
  41    }
  42
  43    void incr(std::size_t n)
  44    {
  45       m_size += n;
  46    }
  47
  48    void release()
  49    {
  50       m_size = 0u;
  51       m_ptr = 0;
  52    }
  53
  54    ~destruct_n()
  55    {
  56       while(m_size--){
  57          m_ptr[m_size].~T();
  58       }
  59    }
  60    private:
  61    T *m_ptr;
  62    std::size_t m_size;
  63 };
  64
  65 }} //namespace boost {  namespace movelib{
  66
  67 #endif //#ifndef BOOST_MOVE_DETAIL_DESTRUCT_N_HPP