Include/weakrefobject.h

   1 /* Weak references objects for Python. */
   2
   3 #ifndef Py_WEAKREFOBJECT_H
   4 #define Py_WEAKREFOBJECT_H
   5 #ifdef __cplusplus
   6 extern "C" {
   7 #endif
   8
   9
  10 typedef struct _PyWeakReference PyWeakReference;
  11
  12 struct _PyWeakReference {
  13     PyObject_HEAD
  14     PyObject *wr_object;
  15     PyObject *wr_callback;
  16     long hash;
  17     PyWeakReference *wr_prev;
  18     PyWeakReference *wr_next;
  19 };
  20
  21 extern DL_IMPORT(PyTypeObject) _PyWeakref_RefType;
  22 extern DL_IMPORT(PyTypeObject) _PyWeakref_ProxyType;
  23 extern DL_IMPORT(PyTypeObject) _PyWeakref_CallableProxyType;
  24
  25 #define PyWeakref_CheckRef(op) \
  26         ((op)->ob_type == &_PyWeakref_RefType)
  27 #define PyWeakref_CheckProxy(op) \
  28         (((op)->ob_type == &_PyWeakref_ProxyType) || \
  29          ((op)->ob_type == &_PyWeakref_CallableProxyType))
  30 #define PyWeakref_Check(op) \
  31         (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))
  32
  33
  34 extern DL_IMPORT(PyObject *) PyWeakref_NewRef(PyObject *ob,
  35                                               PyObject *callback);
  36 extern DL_IMPORT(PyObject *) PyWeakref_NewProxy(PyObject *ob,
  37                                                 PyObject *callback);
  38 extern DL_IMPORT(PyObject *) PyWeakref_GetObject(PyObject *ref);
  39
  40 extern DL_IMPORT(long) _PyWeakref_GetWeakrefCount(PyWeakReference *head);
  41
  42 #define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object)
  43
  44
  45 #ifdef __cplusplus
  46 }
  47 #endif
  48 #endif /* !Py_WEAKREFOBJECT_H */