Mercurial > cpython-lru_cache-weakref

annotate Include/weakrefobject.h @ 56121:ea697cde6882 3.1

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Merged revisions 74881-74885,74888,74891-74895,74900,74905-74906,74931-74932,74934,74941-74942,74944,74956 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r74881 | r.david.murray | 2009-09-17 15:12:49 -0400 (Thu, 17 Sep 2009) | 2 lines Check in first draft of maintainers.rst. ........ r74882 | eric.smith | 2009-09-17 15:22:30 -0400 (Thu, 17 Sep 2009) | 1 line Typo. ........ r74883 | mark.dickinson | 2009-09-17 15:37:28 -0400 (Thu, 17 Sep 2009) | 1 line Add some more module maintainers. ........ r74884 | mark.dickinson | 2009-09-17 15:39:12 -0400 (Thu, 17 Sep 2009) | 1 line Revert accidental changes to Objects/longobject.c ........ r74885 | mark.dickinson | 2009-09-17 16:20:01 -0400 (Thu, 17 Sep 2009) | 1 line Add decimal maintainers ........ r74888 | r.david.murray | 2009-09-17 18:10:48 -0400 (Thu, 17 Sep 2009) | 2 lines Maintainer additions from MAL. ........ r74891 | georg.brandl | 2009-09-17 18:18:01 -0400 (Thu, 17 Sep 2009) | 1 line Some more maintainers. ........ r74892 | r.david.murray | 2009-09-17 19:23:56 -0400 (Thu, 17 Sep 2009) | 2 lines Add a couple interest areas for Nick per his request. ........ r74893 | r.david.murray | 2009-09-17 19:43:20 -0400 (Thu, 17 Sep 2009) | 2 lines Benajmin is also compiler-knowledgeable. ........ r74894 | alexandre.vassalotti | 2009-09-17 20:59:05 -0400 (Thu, 17 Sep 2009) | 2 lines Added myself to my areas of interest. ........ r74895 | brett.cannon | 2009-09-17 21:03:35 -0400 (Thu, 17 Sep 2009) | 1 line Add myself to a couple places as maintainer. ........ r74900 | georg.brandl | 2009-09-18 05:06:37 -0400 (Fri, 18 Sep 2009) | 1 line Add myself in interest areas. ........ r74905 | ezio.melotti | 2009-09-18 05:58:43 -0400 (Fri, 18 Sep 2009) | 1 line Add myself in interest areas and mark effbot as inactive in winsound ........ r74906 | antoine.pitrou | 2009-09-18 09:15:23 -0400 (Fri, 18 Sep 2009) | 3 lines Add myself in a couple of places ........ r74931 | r.david.murray | 2009-09-18 17:25:36 -0400 (Fri, 18 Sep 2009) | 5 lines Add some names gleaned from the "Tracker Archeology" thread on python-dev from back in February. Also consolidate the autoconf and makefiles topics into one, and add tracker and svn/hg topics. ........ r74932 | r.david.murray | 2009-09-18 17:32:16 -0400 (Fri, 18 Sep 2009) | 2 lines Remove non-committer mistakenly added. ........ r74934 | r.david.murray | 2009-09-18 17:40:30 -0400 (Fri, 18 Sep 2009) | 2 lines More descriptive/generic name for the svn/hg entry (version control) ........ r74941 | benjamin.peterson | 2009-09-18 18:45:59 -0400 (Fri, 18 Sep 2009) | 1 line add a new category for myself ........ r74942 | benjamin.peterson | 2009-09-18 18:50:55 -0400 (Fri, 18 Sep 2009) | 1 line add myself for symtable ........ r74944 | georg.brandl | 2009-09-19 03:39:05 -0400 (Sat, 19 Sep 2009) | 1 line I would like to maintain the token module! ........ r74956 | r.david.murray | 2009-09-19 14:40:08 -0400 (Sat, 19 Sep 2009) | 3 lines Add everyone who we know has been a release manager as a resource for the 'release management' topic. ........
author R. David Murray <rdmurray@bitdance.com>
date Sat, 19 Sep 2009 19:04:37 +0000
parents 86a2679dca46
children e8969fb822fc 7e771f0363e2
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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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10 typedef struct _PyWeakReference PyWeakReference;
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11
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12 /* PyWeakReference is the base struct for the Python ReferenceType, ProxyType,
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13 * and CallableProxyType.
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14 */
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15 struct _PyWeakReference {
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16 PyObject_HEAD
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17
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18 /* The object to which this is a weak reference, or Py_None if none.
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19 * Note that this is a stealth reference: wr_object's refcount is
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20 * not incremented to reflect this pointer.
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21 */
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22 PyObject *wr_object;
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23
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24 /* A callable to invoke when wr_object dies, or NULL if none. */
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25 PyObject *wr_callback;
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26
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27 /* A cache for wr_object's hash code. As usual for hashes, this is -1
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28 * if the hash code isn't known yet.
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29 */
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30 long hash;
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31
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32 /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
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33 * terminated list of weak references to it. These are the list pointers.
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34 * If wr_object goes away, wr_object is set to Py_None, and these pointers
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35 * have no meaning then.
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36 */
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37 PyWeakReference *wr_prev;
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38 PyWeakReference *wr_next;
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39 };
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40
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41 PyAPI_DATA(PyTypeObject) _PyWeakref_RefType;
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42 PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType;
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43 PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType;
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45 #define PyWeakref_CheckRef(op) PyObject_TypeCheck(op, &_PyWeakref_RefType)
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46 #define PyWeakref_CheckRefExact(op) \
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47 (Py_TYPE(op) == &_PyWeakref_RefType)
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48 #define PyWeakref_CheckProxy(op) \
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49 ((Py_TYPE(op) == &_PyWeakref_ProxyType) || \
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50 (Py_TYPE(op) == &_PyWeakref_CallableProxyType))
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52 /* This macro calls PyWeakref_CheckRef() last since that can involve a
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53 function call; this makes it more likely that the function call
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54 will be avoided. */
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55 #define PyWeakref_Check(op) \
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56 (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))
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59 PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob,
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60 PyObject *callback);
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61 PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob,
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62 PyObject *callback);
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63 PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref);
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65 PyAPI_FUNC(Py_ssize_t) _PyWeakref_GetWeakrefCount(PyWeakReference *head);
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67 PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self);
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69 #define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object)
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72 #ifdef __cplusplus
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73 }
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74 #endif
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75 #endif /* !Py_WEAKREFOBJECT_H */