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 BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
12#define BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
13
14#if defined(_MSC_VER) && (_MSC_VER >= 1200)
15# pragma once
16#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17
18#include <boost/asio/detail/config.hpp>
19#include <boost/asio/detail/addressof.hpp>
20#include <boost/asio/detail/noncopyable.hpp>
21#include <boost/asio/handler_alloc_hook.hpp>
22
23#include <boost/asio/detail/push_options.hpp>
24
25// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
26// a namespace that does not contain any overloads of these functions. The
27// boost_asio_handler_alloc_helpers namespace is defined here for that purpose.
28namespace boost_asio_handler_alloc_helpers {
29
30template <typename Handler>
31inline void* allocate(std::size_t s, Handler& h)
32{
33#if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
34 return ::operator new(s);
35#else
36 using boost::asio::asio_handler_allocate;
37 return asio_handler_allocate(s, boost::asio::detail::addressof(h));
38#endif
39}
40
41template <typename Handler>
42inline void deallocate(void* p, std::size_t s, Handler& h)
43{
44#if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
45 ::operator delete(p);
46#else
47 using boost::asio::asio_handler_deallocate;
48 asio_handler_deallocate(p, s, boost::asio::detail::addressof(h));
49#endif
50}
51
52} // namespace boost_asio_handler_alloc_helpers
53
54#define BOOST_ASIO_DEFINE_HANDLER_PTR(op) \
55 struct ptr \
56 { \
57 Handler* h; \
58 void* v; \
59 op* p; \
60 ~ptr() \
61 { \
62 reset(); \
63 } \
64 void reset() \
65 { \
66 if (p) \
67 { \
68 p->~op(); \
69 p = 0; \
70 } \
71 if (v) \
72 { \
73 boost_asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); \
74 v = 0; \
75 } \
76 } \
77 } \
78 /**/
79
80#include <boost/asio/detail/pop_options.hpp>
81
82#endif // BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
83