//
// detail/handler_alloc_helpers.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//

#ifndef ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
#define ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP


#include "asio/detail/config.hpp"
#include "asio/detail/addressof.hpp"
#include "asio/detail/noncopyable.hpp"
#include "asio/handler_alloc_hook.hpp"

#include "asio/detail/push_options.hpp"

// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
// a namespace that does not contain any overloads of these functions. The
// asio_handler_alloc_helpers namespace is defined here for that purpose.
namespace asio_handler_alloc_helpers {

template <typename Handler>
inline void* allocate(std::size_t s, Handler& h)
{
#if !defined(ASIO_HAS_HANDLER_HOOKS)
  return ::operator new(s);
#else
  using asio::asio_handler_allocate;
  return asio_handler_allocate(s, asio::detail::addressof(h));
#endif
}

template <typename Handler>
inline void deallocate(void* p, std::size_t s, Handler& h)
{
#if !defined(ASIO_HAS_HANDLER_HOOKS)
  ::operator delete(p);
#else
  using asio::asio_handler_deallocate;
  asio_handler_deallocate(p, s, asio::detail::addressof(h));
#endif
}

} // namespace asio_handler_alloc_helpers

#define ASIO_DEFINE_HANDLER_PTR(op)    struct ptr    {      Handler* h;      void* v;      op* p;      ~ptr()      {        reset();      }      void reset()      {        if (p)        {          p->~op();          p = 0;        }        if (v)        {          asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h);          v = 0;        }      }    }    /**/

#include "asio/detail/pop_options.hpp"

#endif // ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP