gameserv-2.0/asio/asio/detail/handler_alloc_helpers.hpp

   1 //
   2 // detail/handler_alloc_helpers.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2011 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 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include "asio/detail/config.hpp"
  19 #include <boost/detail/workaround.hpp>
  20 #include <boost/utility/addressof.hpp>
  21 #include "asio/detail/noncopyable.hpp"
  22 #include "asio/handler_alloc_hook.hpp"
  23
  24 #include "asio/detail/push_options.hpp"
  25
  26 // Calls to asio_handler_allocate and asio_handler_deallocate must be made from
  27 // a namespace that does not contain any overloads of these functions. The
  28 // asio_handler_alloc_helpers namespace is defined here for that purpose.
  29 namespace asio_handler_alloc_helpers {
  30
  31 template <typename Handler>
  32 inline void* allocate(std::size_t s, Handler& h)
  33 {
  34 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) \
  35   || BOOST_WORKAROUND(__GNUC__, < 3)
  36   return ::operator new(s);
  37 #else
  38   using namespace asio;
  39   return asio_handler_allocate(s, boost::addressof(h));
  40 #endif
  41 }
  42
  43 template <typename Handler>
  44 inline void deallocate(void* p, std::size_t s, Handler& h)
  45 {
  46 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) \
  47   || BOOST_WORKAROUND(__GNUC__, < 3)
  48   ::operator delete(p);
  49 #else
  50   using namespace asio;
  51   asio_handler_deallocate(p, s, boost::addressof(h));
  52 #endif
  53 }
  54
  55 } // namespace asio_handler_alloc_helpers
  56
  57 #define ASIO_DEFINE_HANDLER_PTR(op) \
  58   struct ptr \
  59   { \
  60     Handler* h; \
  61     void* v; \
  62     op* p; \
  63     ~ptr() \
  64     { \
  65       reset(); \
  66     } \
  67     void reset() \
  68     { \
  69       if (p) \
  70       { \
  71         p->~op(); \
  72         p = 0; \
  73       } \
  74       if (v) \
  75       { \
  76         asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); \
  77         v = 0; \
  78       } \
  79     } \
  80   } \
  81   /**/
  82
  83 #include "asio/detail/pop_options.hpp"
  84
  85 #endif // ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP