//////////////////////////////////////////////////////////////////////////////

//

// (C) Copyright Ion Gaztanaga 2007-2008. 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_SYNC_NAMED_CREATION_FUNCTOR_HPP

#define BOOST_INTERPROCESS_SYNC_NAMED_CREATION_FUNCTOR_HPP



#include <boost/interprocess/creation_tags.hpp>

#include <boost/interprocess/detail/type_traits.hpp>

#include <boost/interprocess/detail/mpl.hpp>



namespace boost {

namespace interprocess {

namespace detail {



struct named_creation_functor_no_arg{};



template <class T, class Arg = named_creation_functor_no_arg>

class named_creation_functor

{

   typedef named_creation_functor_no_arg no_arg_t;

   public:

   named_creation_functor(detail::create_enum_t type, Arg arg = Arg())

      :  m_creation_type(type), m_arg(arg){}



   template<class ArgType>

   void construct(void *address, typename enable_if_c<is_same<ArgType, no_arg_t>::value>::type * = 0) const

   {  new(address)T; }



   template<class ArgType>

   void construct(void *address, typename enable_if_c<!is_same<ArgType, no_arg_t>::value>::type * = 0) const

   {  new(address)T(m_arg); }



   bool operator()(void *address, std::size_t, bool created) const

   {   

      switch(m_creation_type){

         case detail::DoOpen:

            return true;

         break;

         case detail::DoCreate:

         case detail::DoOpenOrCreate:

            if(created){

               construct<Arg>(address);

            }

            return true;

         break;



         default:

            return false;

         break;

      }

   }

   private:

   detail::create_enum_t m_creation_type;

   Arg m_arg;

};



}  //namespace detail {

}  //namespace interprocess {

}  //namespace boost {



#endif   //BOOST_INTERPROCESS_SYNC_NAMED_CREATION_FUNCTOR_HPP

