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140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Wrap void* pointers to be passed between C modules */
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#include "Python.h"
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/* Declarations for objects of type PyCObject */
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typedef struct {
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PyObject_HEAD
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void *cobject;
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void (*destructor) Py_PROTO((void *));
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} PyCObject;
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PyObject *
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PyCObject_FromVoidPtr(cobj, destr)
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void *cobj;
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void (*destr) Py_PROTO((void *));
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{
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PyCObject *self;
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self = PyObject_NEW(PyCObject, &PyCObject_Type);
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if (self == NULL)
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return NULL;
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self->cobject=cobj;
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self->destructor=destr;
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return (PyObject *)self;
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}
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void *
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PyCObject_AsVoidPtr(self)
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PyObject *self;
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{
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if(self)
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{
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if(self->ob_type == &PyCObject_Type)
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return ((PyCObject *)self)->cobject;
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PyErr_SetString(PyExc_TypeError,
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"PyCObject_AsVoidPtr with non-C-object");
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}
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if(! PyErr_Occurred())
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PyErr_SetString(PyExc_TypeError,
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"PyCObject_AsVoidPtr called with null pointer");
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return NULL;
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}
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void *
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PyCObject_Import(module_name, name)
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char *module_name;
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char *name;
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{
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PyObject *m, *c;
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void *r=NULL;
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if((m=PyImport_ImportModule(module_name)))
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{
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if((c=PyObject_GetAttrString(m,name)))
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{
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r=PyCObject_AsVoidPtr(c);
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Py_DECREF(c);
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}
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Py_DECREF(m);
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}
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return r;
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}
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static void
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PyCObject_dealloc(self)
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PyCObject *self;
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{
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if(self->destructor) (self->destructor)(self->cobject);
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PyMem_DEL(self);
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}
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static char PyCObject_Type__doc__[] =
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"C objects to be exported from one extension module to another\n\
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\n\
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C objects are used for communication between extension modules. They\n\
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provide a way for an extension module to export a C interface to other\n\
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extension modules, so that extension modules can use the Python import\n\
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mechanism to link to one another.\n"
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;
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PyTypeObject PyCObject_Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0, /*ob_size*/
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"PyCObject", /*tp_name*/
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sizeof(PyCObject), /*tp_basicsize*/
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0, /*tp_itemsize*/
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/* methods */
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(destructor)PyCObject_dealloc, /*tp_dealloc*/
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(printfunc)0, /*tp_print*/
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(getattrfunc)0, /*tp_getattr*/
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(setattrfunc)0, /*tp_setattr*/
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(cmpfunc)0, /*tp_compare*/
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(reprfunc)0, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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(hashfunc)0, /*tp_hash*/
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(ternaryfunc)0, /*tp_call*/
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(reprfunc)0, /*tp_str*/
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/* Space for future expansion */
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0L,0L,0L,0L,
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PyCObject_Type__doc__ /* Documentation string */
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};
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