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python/Objects/cobject.c at master · broncodans/python · GitHub
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/* Wrap void* pointers to be passed between C modules */
#include
"Python.h"
/* Declarations for objects of type PyCObject */
typedef
void
(
*
destructor1
)(
void
*
);
typedef
void
(
*
destructor2
)(
void
*
,
void
*
);
PyObject
*
PyCObject_FromVoidPtr
(
void
*
cobj
,
void
(
*
destr
)(
void
*
))
{
PyCObject
*
self
;
self
=
PyObject_NEW
(
PyCObject
,
&
PyCObject_Type
);
if
(
self
==
NULL
)
return
NULL
;
self
->
cobject
=
cobj
;
self
->
destructor
=
destr
;
self
->
desc
=
NULL
;
return
(
PyObject
*
)
self
;
}
PyObject
*
PyCObject_FromVoidPtrAndDesc
(
void
*
cobj
,
void
*
desc
,
void
(
*
destr
)(
void
*
,
void
*
))
{
PyCObject
*
self
;
if
(!
desc
) {
PyErr_SetString
(
PyExc_TypeError
,
"PyCObject_FromVoidPtrAndDesc called with null"
" description"
);
return
NULL
;
}
self
=
PyObject_NEW
(
PyCObject
,
&
PyCObject_Type
);
if
(
self
==
NULL
)
return
NULL
;
self
->
cobject
=
cobj
;
self
->
destructor
=
(
destructor1
)
destr
;
self
->
desc
=
desc
;
return
(
PyObject
*
)
self
;
}
void
*
PyCObject_AsVoidPtr
(
PyObject
*
self
)
{
if
(
self
) {
if
(
self
->
ob_type
==
&
PyCObject_Type
)
return
((
PyCObject
*
)
self
)
->
cobject
;
PyErr_SetString
(
PyExc_TypeError
,
"PyCObject_AsVoidPtr with non-C-object"
);
}
if
(!
PyErr_Occurred
())
PyErr_SetString
(
PyExc_TypeError
,
"PyCObject_AsVoidPtr called with null pointer"
);
return
NULL
;
}
void
*
PyCObject_GetDesc
(
PyObject
*
self
)
{
if
(
self
) {
if
(
self
->
ob_type
==
&
PyCObject_Type
)
return
((
PyCObject
*
)
self
)
->
desc
;
PyErr_SetString
(
PyExc_TypeError
,
"PyCObject_GetDesc with non-C-object"
);
}
if
(!
PyErr_Occurred
())
PyErr_SetString
(
PyExc_TypeError
,
"PyCObject_GetDesc called with null pointer"
);
return
NULL
;
}
void
*
PyCObject_Import
(
char
*
module_name
,
char
*
name
)
{
PyObject
*
m
,
*
c
;
void
*
r
=
NULL
;
if
((
m
=
PyImport_ImportModule
(
module_name
))) {
if
((
c
=
PyObject_GetAttrString
(
m
,
name
))) {
r
=
PyCObject_AsVoidPtr
(
c
);
Py_DECREF
(
c
);
}
Py_DECREF
(
m
);
}
return
r
;
}
int
PyCObject_SetVoidPtr
(
PyObject
*
self
,
void
*
cobj
)
{
PyCObject
*
cself
=
(
PyCObject
*
)
self
;
if
(
cself
==
NULL
||
!
PyCObject_Check
(
cself
)
||
cself
->
destructor
!=
NULL
) {
PyErr_SetString
(
PyExc_TypeError
,
"Invalid call to PyCObject_SetVoidPtr"
);
return
0
;
}
cself
->
cobject
=
cobj
;
return
1
;
}
static
void
PyCObject_dealloc
(
PyCObject
*
self
)
{
if
(
self
->
destructor
) {
if
(
self
->
desc
)
((
destructor2
)(
self
->
destructor
))(
self
->
cobject
,
self
->
desc
);
else
(
self
->
destructor
)(
self
->
cobject
);
}
PyObject_DEL
(
self
);
}
PyDoc_STRVAR
(
PyCObject_Type__doc__
,
"C objects to be exported from one extension module to another\n\
\n\
C objects are used for communication between extension modules. They\n\
provide a way for an extension module to export a C interface to other\n\
extension modules, so that extension modules can use the Python import\n\
mechanism to link to one another."
);
PyTypeObject
PyCObject_Type
=
{
PyVarObject_HEAD_INIT
(
&
PyType_Type
,
0
)
"PyCObject"
,
/*tp_name*/
sizeof
(
PyCObject
),
/*tp_basicsize*/
0
,
/*tp_itemsize*/
/* methods */
(
destructor
)
PyCObject_dealloc
,
/*tp_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*/
PyCObject_Type__doc__
/*tp_doc*/
};
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