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//
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// detail/handler_alloc_helpers.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
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#define BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <boost/asio/detail/addressof.hpp>
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#include <boost/asio/detail/noncopyable.hpp>
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#include <boost/asio/handler_alloc_hook.hpp>
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#include <boost/asio/detail/push_options.hpp>
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// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
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// a namespace that does not contain any overloads of these functions. The
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// boost_asio_handler_alloc_helpers namespace is defined here for that purpose.
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namespace boost_asio_handler_alloc_helpers {
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template <typename Handler>
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inline void* allocate(std::size_t s, Handler& h)
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{
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#if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
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  return ::operator new(s);
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#else
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  using boost::asio::asio_handler_allocate;
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  return asio_handler_allocate(s, boost::asio::detail::addressof(h));
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#endif
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}
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template <typename Handler>
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inline void deallocate(void* p, std::size_t s, Handler& h)
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{
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#if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
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  ::operator delete(p);
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#else
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  using boost::asio::asio_handler_deallocate;
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  asio_handler_deallocate(p, s, boost::asio::detail::addressof(h));
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#endif
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}
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} // namespace boost_asio_handler_alloc_helpers
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#define BOOST_ASIO_DEFINE_HANDLER_PTR(op) \
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  struct ptr \
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  { \
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    Handler* h; \
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    void* v; \
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    op* p; \
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    ~ptr() \
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    { \
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      reset(); \
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    } \
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    void reset() \
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    { \
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      if (p) \
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      { \
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        p->~op(); \
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        p = 0; \
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      } \
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      if (v) \
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      { \
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        boost_asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); \
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        v = 0; \
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      } \
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    } \
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  } \
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  /**/
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP