boost/interprocess/detail/in_place_interface.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2005-2008. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/interprocess for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef BOOST_INTERPROCESS_IN_PLACE_INTERFACE_HPP
  12 #define BOOST_INTERPROCESS_IN_PLACE_INTERFACE_HPP
  13
  14 #if (defined _MSC_VER) && (_MSC_VER >= 1200)
  15 #  pragma once
  16 #endif
  17
  18 #include <boost/interprocess/detail/config_begin.hpp>
  19 #include <boost/interprocess/detail/workaround.hpp>
  20 #include <boost/interprocess/detail/type_traits.hpp>
  21 #include <typeinfo>  //typeid
  22
  23 //!\file
  24 //!Describes an abstract interface for placement construction and destruction.
  25
  26 namespace boost {
  27 namespace interprocess {
  28 namespace detail {
  29
  30 struct in_place_interface
  31 {
  32    in_place_interface(std::size_t alignm, std::size_t sz, const char *tname)
  33    :  alignment(alignm), size(sz), type_name(tname)
  34    {}
  35
  36    std::size_t alignment;
  37    std::size_t size;
  38    const char *type_name;
  39
  40    virtual void construct_n(void *mem, std::size_t num, std::size_t &constructed) = 0;
  41    virtual void destroy_n(void *mem, std::size_t num, std::size_t &destroyed) = 0;
  42    virtual ~in_place_interface(){}
  43 };
  44
  45 template<class T>
  46 struct placement_destroy :  public in_place_interface
  47 {
  48    placement_destroy()
  49       :  in_place_interface(detail::alignment_of<T>::value, sizeof(T), typeid(T).name())
  50    {}
  51
  52    virtual void destroy_n(void *mem, std::size_t num, std::size_t &destroyed)
  53    {
  54       T* memory = static_cast<T*>(mem);
  55       for(destroyed = 0; destroyed < num; ++destroyed)
  56          (memory++)->~T();
  57    }
  58
  59    virtual void construct_n(void *, std::size_t, std::size_t &) {}
  60
  61    private:
  62    void destroy(void *mem)
  63    {  static_cast<T*>(mem)->~T();   }
  64 };
  65
  66 }
  67 }
  68 }   //namespace boost { namespace interprocess { namespace detail {
  69
  70 #include <boost/interprocess/detail/config_end.hpp>
  71
  72 #endif //#ifndef BOOST_INTERPROCESS_IN_PLACE_INTERFACE_HPP