include/luabind/detail/conversion_storage.hpp

   1 // Copyright Daniel Wallin 2008. Use, modification and distribution is
   2 // subject to the Boost Software License, Version 1.0. (See accompanying
   3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 #ifndef LUABIND_CONVERSION_STORAGE_080930_HPP
   6 # define LUABIND_CONVERSION_STORAGE_080930_HPP
   7
   8 # include <luabind/config.hpp>
   9 # include <boost/aligned_storage.hpp>
  10
  11 namespace luabind { namespace detail {
  12
  13 typedef void(*destruction_function)(void*);
  14
  15 // This is used by the converters in policy.hpp, and
  16 // class_rep::convert_to as temporary storage when constructing
  17 // holders.
  18
  19 struct conversion_storage
  20 {
  21     conversion_storage()
  22       : destructor(0)
  23     {}
  24
  25     ~conversion_storage()
  26     {
  27         if (destructor)
  28             destructor(&data);
  29     }
  30
  31     // Unfortunately the converters currently doesn't have access to
  32     // the actual type being converted when this is instantiated, so
  33     // we have to guess a max size.
  34     boost::aligned_storage<128> data;
  35     destruction_function destructor;
  36 };
  37
  38 }} // namespace luabind::detail
  39
  40 #endif // LUABIND_CONVERSION_STORAGE_080930_HPP
  41