Fred Drake | 8844d52 | 2001-10-05 21:52:26 +0000 | [diff] [blame] | 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 | |
Fred Drake | 8844d52 | 2001-10-05 21:52:26 +0000 | [diff] [blame] | 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 */ |