boost/asio/detail/handler_base_from_member.hpp

   1 //
   2 // handler_base_from_member.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2008 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_BASE_FROM_MEMBER_HPP
  12 #define BOOST_ASIO_DETAIL_HANDLER_BASE_FROM_MEMBER_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/push_options.hpp>
  19
  20 #include <boost/asio/detail/handler_alloc_helpers.hpp>
  21 #include <boost/asio/detail/handler_invoke_helpers.hpp>
  22
  23 namespace boost {
  24 namespace asio {
  25 namespace detail {
  26
  27 // Base class for classes that need a handler data member. Forwards the custom
  28 // allocation and invocation hooks to the contained handler.
  29 template <typename Handler>
  30 class handler_base_from_member
  31 {
  32 public:
  33   handler_base_from_member(Handler handler)
  34     : handler_(handler)
  35   {
  36   }
  37
  38 //protected:
  39   Handler handler_;
  40
  41 protected:
  42   // Protected destructor to prevent deletion through this type.
  43   ~handler_base_from_member()
  44   {
  45   }
  46 };
  47
  48 template <typename Handler>
  49 inline void* asio_handler_allocate(std::size_t size,
  50     handler_base_from_member<Handler>* this_handler)
  51 {
  52   return boost_asio_handler_alloc_helpers::allocate(
  53       size, &this_handler->handler_);
  54 }
  55
  56 template <typename Handler>
  57 inline void asio_handler_deallocate(void* pointer, std::size_t size,
  58     handler_base_from_member<Handler>* this_handler)
  59 {
  60   boost_asio_handler_alloc_helpers::deallocate(
  61       pointer, size, &this_handler->handler_);
  62 }
  63
  64 template <typename Function, typename Handler>
  65 inline void asio_handler_invoke(const Function& function,
  66     handler_base_from_member<Handler>* this_handler)
  67 {
  68   boost_asio_handler_invoke_helpers::invoke(
  69       function, &this_handler->handler_);
  70 }
  71
  72 } // namespace detail
  73 } // namespace asio
  74 } // namespace boost
  75
  76 #include <boost/asio/detail/pop_options.hpp>
  77
  78 #endif // BOOST_ASIO_DETAIL_HANDLER_BASE_FROM_MEMBER_HPP