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

   1 #ifndef BORROWED_PTR_DWA20020601_HPP
   2 # define BORROWED_PTR_DWA20020601_HPP
   3 // Copyright David Abrahams 2002.
   4 // Distributed under the Boost Software License, Version 1.0. (See
   5 // accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 # include <boost/config.hpp>
   9 # include <boost/type.hpp>
  10 # include <boost/mpl/if.hpp>
  11 # include <boost/type_traits/object_traits.hpp>
  12 # include <boost/type_traits/cv_traits.hpp>
  13 # include <boost/python/tag.hpp>
  14
  15 namespace boost { namespace python { namespace detail {
  16
  17 template<class T> class borrowed
  18 {
  19     typedef T type;
  20 };
  21
  22 template<typename T>
  23 struct is_borrowed_ptr
  24 {
  25     BOOST_STATIC_CONSTANT(bool, value = false);
  26 };
  27
  28 #  if !defined(__MWERKS__) || __MWERKS__ > 0x3000
  29 template<typename T>
  30 struct is_borrowed_ptr<borrowed<T>*>
  31 {
  32     BOOST_STATIC_CONSTANT(bool, value = true);
  33 };
  34
  35 template<typename T>
  36 struct is_borrowed_ptr<borrowed<T> const*>
  37 {
  38     BOOST_STATIC_CONSTANT(bool, value = true);
  39 };
  40
  41 template<typename T>
  42 struct is_borrowed_ptr<borrowed<T> volatile*>
  43 {
  44     BOOST_STATIC_CONSTANT(bool, value = true);
  45 };
  46
  47 template<typename T>
  48 struct is_borrowed_ptr<borrowed<T> const volatile*>
  49 {
  50     BOOST_STATIC_CONSTANT(bool, value = true);
  51 };
  52 #  else
  53 template<typename T>
  54 struct is_borrowed
  55 {
  56     BOOST_STATIC_CONSTANT(bool, value = false);
  57 };
  58 template<typename T>
  59 struct is_borrowed<borrowed<T> >
  60 {
  61     BOOST_STATIC_CONSTANT(bool, value = true);
  62 };
  63 template<typename T>
  64 struct is_borrowed_ptr<T*>
  65     : is_borrowed<typename remove_cv<T>::type>
  66 {
  67 };
  68 #  endif
  69
  70
  71 }
  72
  73 template <class T>
  74 inline T* get_managed_object(detail::borrowed<T> const volatile* p, tag_t)
  75 {
  76     return (T*)p;
  77 }
  78
  79 }} // namespace boost::python::detail
  80
  81 #endif // #ifndef BORROWED_PTR_DWA20020601_HPP