82 lines
2.3 KiB
Plaintext
82 lines
2.3 KiB
Plaintext
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2007-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTERPROCESS_SYNC_NAMED_CREATION_FUNCTOR_HPP
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#define BOOST_INTERPROCESS_SYNC_NAMED_CREATION_FUNCTOR_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/interprocess/creation_tags.hpp>
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#include <boost/interprocess/detail/type_traits.hpp>
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#include <boost/interprocess/detail/mpl.hpp>
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#include <boost/container/detail/placement_new.hpp>
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namespace boost {
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namespace interprocess {
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namespace ipcdetail {
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struct named_creation_functor_no_arg{};
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template <class T, class Arg = named_creation_functor_no_arg>
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class named_creation_functor
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{
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typedef named_creation_functor_no_arg no_arg_t;
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public:
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named_creation_functor(create_enum_t type, Arg arg = Arg())
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: m_creation_type(type), m_arg(arg){}
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template<class ArgType>
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void construct(void *address, typename enable_if_c<is_same<ArgType, no_arg_t>::value>::type * = 0) const
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{ ::new(address, boost_container_new_t())T; }
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template<class ArgType>
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void construct(void *address, typename enable_if_c<!is_same<ArgType, no_arg_t>::value>::type * = 0) const
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{ ::new(address, boost_container_new_t())T(m_arg); }
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bool operator()(void *address, std::size_t, bool created) const
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{
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switch(m_creation_type){
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case DoOpen:
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return true;
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break;
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case DoCreate:
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case DoOpenOrCreate:
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if(created){
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construct<Arg>(address);
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}
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return true;
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break;
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default:
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return false;
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break;
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}
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}
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static std::size_t get_min_size()
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{ return sizeof(T); }
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private:
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create_enum_t m_creation_type;
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Arg m_arg;
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};
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} //namespace ipcdetail {
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} //namespace interprocess {
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} //namespace boost {
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#endif //BOOST_INTERPROCESS_SYNC_NAMED_CREATION_FUNCTOR_HPP
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