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 SCOPE_DWA2002724_HPP |
6 | # define SCOPE_DWA2002724_HPP |
7 | |
8 | # include <boost/python/detail/prefix.hpp> |
9 | # include <boost/python/object.hpp> |
10 | # include <boost/python/refcount.hpp> |
11 | |
12 | namespace boost { namespace python { |
13 | |
14 | namespace detail |
15 | { |
16 | // Making this a namespace-scope variable to avoid Cygwin issues. |
17 | // Use a PyObject* to avoid problems with static destruction after Py_Finalize |
18 | extern BOOST_PYTHON_DECL PyObject* current_scope; |
19 | } |
20 | |
21 | class scope |
22 | : public object |
23 | { |
24 | public: |
25 | inline scope(scope const&); |
26 | inline scope(object const&); |
27 | inline scope(); |
28 | inline ~scope(); |
29 | |
30 | private: // data members |
31 | PyObject* m_previous_scope; |
32 | |
33 | private: // unimplemented functions |
34 | void operator=(scope const&); |
35 | }; |
36 | |
37 | inline scope::scope(object const& new_scope) |
38 | : object(new_scope) |
39 | , m_previous_scope(detail::current_scope) |
40 | { |
41 | detail::current_scope = python::incref(new_scope.ptr()); |
42 | } |
43 | |
44 | inline scope::scope() |
45 | : object(detail::borrowed_reference( |
46 | detail::current_scope ? detail::current_scope : Py_None |
47 | )) |
48 | , m_previous_scope(python::xincref(detail::current_scope)) |
49 | { |
50 | } |
51 | |
52 | inline scope::~scope() |
53 | { |
54 | python::xdecref(detail::current_scope); |
55 | detail::current_scope = m_previous_scope; |
56 | } |
57 | |
58 | namespace converter |
59 | { |
60 | template <> |
61 | struct object_manager_traits<scope> |
62 | : object_manager_traits<object> |
63 | { |
64 | }; |
65 | } |
66 | |
67 | // Placing this after the specialization above suppresses a CWPro8.3 bug |
68 | inline scope::scope(scope const& new_scope) |
69 | : object(new_scope) |
70 | , m_previous_scope(detail::current_scope) |
71 | { |
72 | detail::current_scope = python::incref(new_scope.ptr()); |
73 | } |
74 | |
75 | }} // namespace boost::python |
76 | |
77 | #endif // SCOPE_DWA2002724_HPP |
78 | |