/* C objects to be exported from one extension module to another.

   C objects are used for communication between extension modules.

   They provide a way for an extension module to export a C interface

   to other extension modules, so that extension modules can use the

   Python import mechanism to link to one another.

*/

#ifndef Py_COBJECT_H

#define Py_COBJECT_H

#ifdef __cplusplus

extern "C" {

#endif

PyAPI_DATA(PyTypeObject) PyCObject_Type;

#define PyCObject_Check(op) (Py_TYPE(op) == &PyCObject_Type)

/* Create a PyCObject from a pointer to a C object and an optional

   destructor function.  If the second argument is non-null, then it

   will be called with the first argument if and when the PyCObject is

   destroyed.

*/

PyAPI_FUNC(PyObject *) PyCObject_FromVoidPtr(

	void *cobj, void (*destruct)(void*));

/* Create a PyCObject from a pointer to a C object, a description object,

   and an optional destructor function.  If the third argument is non-null,

   then it will be called with the first and second arguments if and when 

   the PyCObject is destroyed.

*/

PyAPI_FUNC(PyObject *) PyCObject_FromVoidPtrAndDesc(

	void *cobj, void *desc, void (*destruct)(void*,void*));

/* Retrieve a pointer to a C object from a PyCObject. */

PyAPI_FUNC(void *) PyCObject_AsVoidPtr(PyObject *);

/* Retrieve a pointer to a description object from a PyCObject. */

PyAPI_FUNC(void *) PyCObject_GetDesc(PyObject *);

/* Import a pointer to a C object from a module using a PyCObject. */

PyAPI_FUNC(void *) PyCObject_Import(char *module_name, char *cobject_name);

/* Modify a C object. Fails (==0) if object has a destructor. */

PyAPI_FUNC(int) PyCObject_SetVoidPtr(PyObject *self, void *cobj);

typedef struct {

    PyObject_HEAD

    void *cobject;

    void *desc;

    void (*destructor)(void *);

} PyCObject;

#ifdef __cplusplus

}

#endif

#endif /* !Py_COBJECT_H */