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/***********************************************************
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(cobj, destr)
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(cobj, desc, destr)
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(self)
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(self)
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(module_name, name)
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(self)
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.\n"
;
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 */
};
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