mirror of https://github.com/python/cpython.git
156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/***********************************************************
|
|
Copyright (c) 2000, BeOpen.com.
|
|
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
|
|
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
|
|
All rights reserved.
|
|
|
|
See the file "Misc/COPYRIGHT" for information on usage and
|
|
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
|
******************************************************************/
|
|
|
|
/* 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*);
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
void *cobject;
|
|
void *desc;
|
|
void (*destructor)(void *);
|
|
} PyCObject;
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
static char 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 = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /*ob_size*/
|
|
"PyCObject", /*tp_name*/
|
|
sizeof(PyCObject), /*tp_basicsize*/
|
|
0, /*tp_itemsize*/
|
|
/* methods */
|
|
(destructor)PyCObject_dealloc, /*tp_dealloc*/
|
|
(printfunc)0, /*tp_print*/
|
|
(getattrfunc)0, /*tp_getattr*/
|
|
(setattrfunc)0, /*tp_setattr*/
|
|
(cmpfunc)0, /*tp_compare*/
|
|
(reprfunc)0, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
(hashfunc)0, /*tp_hash*/
|
|
(ternaryfunc)0, /*tp_call*/
|
|
(reprfunc)0, /*tp_str*/
|
|
|
|
/* Space for future expansion */
|
|
0L,0L,0L,0L,
|
|
PyCObject_Type__doc__ /* Documentation string */
|
|
};
|