ceph/src/boost/libs/python/include/boost/python/detail/destroy.hpp

   1 // Copyright David Abrahams 2002.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef DESTROY_DWA2002221_HPP
   6 # define DESTROY_DWA2002221_HPP
   7
   8 # include <boost/type_traits/is_array.hpp>
   9 # include <boost/detail/workaround.hpp>
  10 namespace boost { namespace python { namespace detail {
  11
  12 template <bool array> struct value_destroyer;
  13
  14 template <>
  15 struct value_destroyer<false>
  16 {
  17     template <class T>
  18     static void execute(T const volatile* p)
  19     {
  20         p->~T();
  21     }
  22 };
  23
  24 template <>
  25 struct value_destroyer<true>
  26 {
  27     template <class A, class T>
  28     static void execute(A*, T const volatile* const first)
  29     {
  30         for (T const volatile* p = first; p != first + sizeof(A)/sizeof(T); ++p)
  31         {
  32             value_destroyer<
  33                 boost::is_array<T>::value
  34             >::execute(p);
  35         }
  36     }
  37
  38     template <class T>
  39     static void execute(T const volatile* p)
  40     {
  41         execute(p, *p);
  42     }
  43 };
  44
  45 template <class T>
  46 inline void destroy_referent_impl(void* p, T& (*)())
  47 {
  48     // note: cv-qualification needed for MSVC6
  49     // must come *before* T for metrowerks
  50     value_destroyer<
  51          (boost::is_array<T>::value)
  52     >::execute((const volatile T*)p);
  53 }
  54
  55 template <class T>
  56 inline void destroy_referent(void* p, T(*)() = 0)
  57 {
  58     destroy_referent_impl(p, (T(*)())0);
  59 }
  60
  61 }}} // namespace boost::python::detail
  62
  63 #endif // DESTROY_DWA2002221_HPP