ceph/src/boost/libs/asio/include/boost/asio/detail/handler_alloc_helpers.hpp

   1 //
   2 // detail/handler_alloc_helpers.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 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.
  28 namespace boost_asio_handler_alloc_helpers {
  29
  30 template <typename Handler>
  31 inline 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
  41 template <typename Handler>
  42 inline 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