Repository navigation
Expand file tree
/
Copy pathopaque_pointer_converter.hpp
More file actions
187 lines (168 loc) · 5.79 KB
/
Copy pathopaque_pointer_converter.hpp
File metadata and controls
187 lines (168 loc) · 5.79 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
// Copyright Gottfried Ganßauge 2003..2006.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
/*
* Generic Conversion of opaque C++-pointers to a Python-Wrapper.
*/
# ifndef OPAQUE_POINTER_CONVERTER_HPP_
# define OPAQUE_POINTER_CONVERTER_HPP_
# include <boost/python/detail/prefix.hpp>
# include <boost/python/lvalue_from_pytype.hpp>
# include <boost/python/to_python_converter.hpp>
# include <boost/python/converter/registrations.hpp>
# include <boost/python/detail/dealloc.hpp>
# include <boost/python/detail/type_traits.hpp>
# include <boost/python/detail/none.hpp>
# include <boost/python/type_id.hpp>
# include <boost/python/errors.hpp>
# include <boost/implicit_cast.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/mpl/assert.hpp>
// opaque --
//
// registers to- and from- python conversions for a type Pointee.
//
// Note:
// In addition you need to define specializations for type_id
// on the type pointed to by Pointer using
// BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee)
//
// For an example see libs/python/test/opaque.cpp
//
namespace boost { namespace python {
template <class Pointee>
struct opaque
{
opaque()
{
if (type_object.tp_name == 0)
{
type_object.tp_name = const_cast<char*>(type_id<Pointee*>().name());
if (PyType_Ready (&type_object) < 0)
{
throw error_already_set();
}
this->register_self();
}
}
static opaque instance;
private:
static void* extract(PyObject* op)
{
return PyObject_TypeCheck(op, &type_object)
? static_cast<python_instance*>(implicit_cast<void*>(op))->x
: 0
;
}
static PyObject* wrap(void const* px)
{
Pointee* x = *static_cast<Pointee*const*>(px);
if (x == 0)
return detail::none();
if ( python_instance *o = PyObject_New(python_instance, &type_object) )
{
o->x = x;
return static_cast<PyObject*>(implicit_cast<void*>(o));
}
else
{
throw error_already_set();
}
}
void register_self()
{
converter::registration const *existing =
converter::registry::query (type_id<Pointee*>());
if ((existing == 0) || (existing->m_to_python == 0))
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
converter::registry::insert(&extract, type_id<Pointee>(), &get_pytype);
converter::registry::insert(&wrap, type_id<Pointee*>(), &get_pytype);
#else
converter::registry::insert(&extract, type_id<Pointee>());
converter::registry::insert(&wrap, type_id<Pointee*>());
#endif
}
}
struct python_instance
{
PyObject_HEAD
Pointee* x;
};
static PyTypeObject type_object;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const *get_pytype(){return &type_object; }
#endif
};
template <class Pointee>
opaque<Pointee> opaque<Pointee>::instance;
template <class Pointee>
PyTypeObject opaque<Pointee>::type_object =
{
PyVarObject_HEAD_INIT(NULL, 0)
0,
sizeof( BOOST_DEDUCED_TYPENAME opaque<Pointee>::python_instance ),
0,
::boost::python::detail::dealloc,
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
0, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0, /* tp_free */
0, /* tp_is_gc */
0, /* tp_bases */
0, /* tp_mro */
0, /* tp_cache */
0, /* tp_subclasses */
0, /* tp_weaklist */
#if PYTHON_API_VERSION >= 1012
0 /* tp_del */
#endif
};
}} // namespace boost::python
// If you change the below, don't forget to alter the end of type_id.hpp
# define BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee) \
namespace boost { namespace python { \
template<> \
inline type_info type_id<Pointee>() \
{ \
return type_info (typeid (Pointee *)); \
} \
template<> \
inline type_info type_id<const volatile Pointee&>() \
{ \
return type_info (typeid (Pointee *)); \
} \
}}
# endif // OPAQUE_POINTER_CONVERTER_HPP_