Source

features/pep-420 / Include / weakrefobject.h

The branch '2.3' does not exist.
Full commit
Fred Drake 97cfa46 










Tim Peters b585bcc 


Fred Drake 97cfa46 

Tim Peters b585bcc 




Fred Drake 97cfa46 
Tim Peters b585bcc 

Fred Drake 97cfa46 
Tim Peters b585bcc 



Fred Drake 97cfa46 
Tim Peters b585bcc 





Fred Drake 97cfa46 



Mark Hammond c1eb668 


Fred Drake 97cfa46 









Mark Hammond c1eb668 
Fred Drake 97cfa46 
Mark Hammond c1eb668 
Fred Drake 97cfa46 
Mark Hammond c1eb668 
Fred Drake 97cfa46 
Mark Hammond c1eb668 
Fred Drake 97cfa46 
Tim Peters 14d3214 

Fred Drake 97cfa46 





/* Weak references objects for Python. */

#ifndef Py_WEAKREFOBJECT_H
#define Py_WEAKREFOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif


typedef struct _PyWeakReference PyWeakReference;

/* PyWeakReference is the base struct for the Python ReferenceType, ProxyType,
 * and CallableProxyType.
 */
struct _PyWeakReference {
    PyObject_HEAD

    /* The object to which this is a weak reference, or Py_None if none.
     * Note that this is a stealth reference:  wr_object's refcount is
     * not incremented to reflect this pointer.
     */
    PyObject *wr_object;

    /* A callable to invoke when wr_object dies, or NULL if none. */
    PyObject *wr_callback;

    /* A cache for wr_object's hash code.  As usual for hashes, this is -1
     * if the hash code isn't known yet.
     */
    long hash;

    /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
     * terminated list of weak references to it.  These are the list pointers.
     * If wr_object goes away, wr_object is set to Py_None, and these pointers
     * have no meaning then.
     */
    PyWeakReference *wr_prev;
    PyWeakReference *wr_next;
};

PyAPI_DATA(PyTypeObject) _PyWeakref_RefType;
PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType;
PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType;

#define PyWeakref_CheckRef(op) \
        ((op)->ob_type == &_PyWeakref_RefType)
#define PyWeakref_CheckProxy(op) \
        (((op)->ob_type == &_PyWeakref_ProxyType) || \
         ((op)->ob_type == &_PyWeakref_CallableProxyType))
#define PyWeakref_Check(op) \
        (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))


PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob,
                                              PyObject *callback);
PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob,
                                                PyObject *callback);
PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref);

PyAPI_FUNC(long) _PyWeakref_GetWeakrefCount(PyWeakReference *head);

PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self);

#define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object)


#ifdef __cplusplus
}
#endif
#endif /* !Py_WEAKREFOBJECT_H */