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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 |