1//
2// detail/handler_alloc_helpers.hpp
3// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6//
7// Distributed under the Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9//
10
11#ifndef ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
12#define ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
13
14
15#include "asio/detail/config.hpp"
16#include "asio/detail/addressof.hpp"
17#include "asio/detail/noncopyable.hpp"
18#include "asio/handler_alloc_hook.hpp"
19
20#include "asio/detail/push_options.hpp"
21
22// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
23// a namespace that does not contain any overloads of these functions. The
24// asio_handler_alloc_helpers namespace is defined here for that purpose.
25namespace asio_handler_alloc_helpers {
26
27template <typename Handler>
28inline void* allocate(std::size_t s, Handler& h)
29{
30#if !defined(ASIO_HAS_HANDLER_HOOKS)
31  return ::operator new(s);
32#else
33  using asio::asio_handler_allocate;
34  return asio_handler_allocate(s, asio::detail::addressof(h));
35#endif
36}
37
38template <typename Handler>
39inline void deallocate(void* p, std::size_t s, Handler& h)
40{
41#if !defined(ASIO_HAS_HANDLER_HOOKS)
42  ::operator delete(p);
43#else
44  using asio::asio_handler_deallocate;
45  asio_handler_deallocate(p, s, asio::detail::addressof(h));
46#endif
47}
48
49} // namespace asio_handler_alloc_helpers
50
51#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;        }      }    }    /**/
52
53#include "asio/detail/pop_options.hpp"
54
55#endif // ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
56