Mercurial > cpython-lru_cache-weakref

annotate Include/weakrefobject.h @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents f48782237f85
children c1eb668525e1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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97cfa461d793 The weak reference implementation, separated from the weakref module.
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1 /* Weak references objects for Python. */
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2
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3 #ifndef Py_WEAKREFOBJECT_H
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4 #define Py_WEAKREFOBJECT_H
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5 #ifdef __cplusplus
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6 extern "C" {
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7 #endif
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8
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9
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10 typedef struct _PyWeakReference PyWeakReference;
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12 struct _PyWeakReference {
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13 PyObject_HEAD
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14 PyObject *wr_object;
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15 PyObject *wr_callback;
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16 long hash;
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17 PyWeakReference *wr_prev;
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18 PyWeakReference *wr_next;
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19 };
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20
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21 extern DL_IMPORT(PyTypeObject) _PyWeakref_RefType;
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22 extern DL_IMPORT(PyTypeObject) _PyWeakref_ProxyType;
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23 extern DL_IMPORT(PyTypeObject) _PyWeakref_CallableProxyType;
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24
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25 #define PyWeakref_CheckRef(op) \
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26 ((op)->ob_type == &_PyWeakref_RefType)
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27 #define PyWeakref_CheckProxy(op) \
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28 (((op)->ob_type == &_PyWeakref_ProxyType) || \
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29 ((op)->ob_type == &_PyWeakref_CallableProxyType))
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30 #define PyWeakref_Check(op) \
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31 (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))
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33
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34 extern DL_IMPORT(PyObject *) PyWeakref_NewRef(PyObject *ob,
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35 PyObject *callback);
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36 extern DL_IMPORT(PyObject *) PyWeakref_NewProxy(PyObject *ob,
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37 PyObject *callback);
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38 extern DL_IMPORT(PyObject *) PyWeakref_GetObject(PyObject *ref);
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39
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40 extern DL_IMPORT(long) _PyWeakref_GetWeakrefCount(PyWeakReference *head);
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41
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42 #define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object)
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45 #ifdef __cplusplus
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46 }
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47 #endif
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48 #endif /* !Py_WEAKREFOBJECT_H */