Mercurial > cpython-lru_cache-weakref

annotate Include/dictobject.h @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents bf9c77bac36d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #ifndef Py_DICTOBJECT_H
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2 #define Py_DICTOBJECT_H
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3 #ifdef __cplusplus
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4 extern "C" {
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5 #endif
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6
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7
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8 /* Dictionary object type -- mapping from hashable object to object */
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9
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10 /* The distribution includes a separate file, Objects/dictnotes.txt,
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11 describing explorations into dictionary design and optimization.
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12 It covers typical dictionary use patterns, the parameters for
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13 tuning dictionaries, and several ideas for possible optimizations.
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14 */
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15
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16 #ifndef Py_LIMITED_API
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17
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18 typedef struct _dictkeysobject PyDictKeysObject;
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19
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20 /* The ma_values pointer is NULL for a combined table
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21 * or points to an array of PyObject* for a split table
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22 */
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23 typedef struct {
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24 PyObject_HEAD
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25 Py_ssize_t ma_used;
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26 PyDictKeysObject *ma_keys;
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27 PyObject **ma_values;
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28 } PyDictObject;
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29
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30 #endif /* Py_LIMITED_API */
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31
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32 PyAPI_DATA(PyTypeObject) PyDict_Type;
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33 PyAPI_DATA(PyTypeObject) PyDictIterKey_Type;
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34 PyAPI_DATA(PyTypeObject) PyDictIterValue_Type;
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35 PyAPI_DATA(PyTypeObject) PyDictIterItem_Type;
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36 PyAPI_DATA(PyTypeObject) PyDictKeys_Type;
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37 PyAPI_DATA(PyTypeObject) PyDictItems_Type;
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38 PyAPI_DATA(PyTypeObject) PyDictValues_Type;
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39
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40 #define PyDict_Check(op) \
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41 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_DICT_SUBCLASS)
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42 #define PyDict_CheckExact(op) (Py_TYPE(op) == &PyDict_Type)
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43 #define PyDictKeys_Check(op) (Py_TYPE(op) == &PyDictKeys_Type)
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44 #define PyDictItems_Check(op) (Py_TYPE(op) == &PyDictItems_Type)
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45 #define PyDictValues_Check(op) (Py_TYPE(op) == &PyDictValues_Type)
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46 /* This excludes Values, since they are not sets. */
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47 # define PyDictViewSet_Check(op) \
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48 (PyDictKeys_Check(op) || PyDictItems_Check(op))
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50
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51 PyAPI_FUNC(PyObject *) PyDict_New(void);
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52 PyAPI_FUNC(PyObject *) PyDict_GetItem(PyObject *mp, PyObject *key);
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53 PyAPI_FUNC(PyObject *) PyDict_GetItemWithError(PyObject *mp, PyObject *key);
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54 PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
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55 struct _Py_Identifier *key);
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56 PyAPI_FUNC(PyObject *) PyDict_SetDefault(
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57 PyObject *mp, PyObject *key, PyObject *defaultobj);
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58 PyAPI_FUNC(int) PyDict_SetItem(PyObject *mp, PyObject *key, PyObject *item);
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59 PyAPI_FUNC(int) PyDict_DelItem(PyObject *mp, PyObject *key);
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60 PyAPI_FUNC(void) PyDict_Clear(PyObject *mp);
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61 PyAPI_FUNC(int) PyDict_Next(
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62 PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value);
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63 #ifndef Py_LIMITED_API
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64 PyDictKeysObject *_PyDict_NewKeysForClass(void);
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65 PyAPI_FUNC(PyObject *) PyObject_GenericGetDict(PyObject *, void *);
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66 PyAPI_FUNC(int) _PyDict_Next(
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67 PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value, Py_hash_t *hash);
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68 #endif
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69 PyAPI_FUNC(PyObject *) PyDict_Keys(PyObject *mp);
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70 PyAPI_FUNC(PyObject *) PyDict_Values(PyObject *mp);
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71 PyAPI_FUNC(PyObject *) PyDict_Items(PyObject *mp);
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72 PyAPI_FUNC(Py_ssize_t) PyDict_Size(PyObject *mp);
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73 PyAPI_FUNC(PyObject *) PyDict_Copy(PyObject *mp);
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74 PyAPI_FUNC(int) PyDict_Contains(PyObject *mp, PyObject *key);
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75 #ifndef Py_LIMITED_API
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76 PyAPI_FUNC(int) _PyDict_Contains(PyObject *mp, PyObject *key, Py_hash_t hash);
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77 PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
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78 PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
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79 PyAPI_FUNC(int) _PyDict_HasOnlyStringKeys(PyObject *mp);
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80 Py_ssize_t _PyDict_KeysSize(PyDictKeysObject *keys);
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81 #define _PyDict_HasSplitTable(d) ((d)->ma_values != NULL)
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82
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83 PyAPI_FUNC(int) PyDict_ClearFreeList(void);
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84 #endif
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85
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86 /* PyDict_Update(mp, other) is equivalent to PyDict_Merge(mp, other, 1). */
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87 PyAPI_FUNC(int) PyDict_Update(PyObject *mp, PyObject *other);
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88
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89 /* PyDict_Merge updates/merges from a mapping object (an object that
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90 supports PyMapping_Keys() and PyObject_GetItem()). If override is true,
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91 the last occurrence of a key wins, else the first. The Python
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92 dict.update(other) is equivalent to PyDict_Merge(dict, other, 1).
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93 */
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94 PyAPI_FUNC(int) PyDict_Merge(PyObject *mp,
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95 PyObject *other,
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96 int override);
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97
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98 /* PyDict_MergeFromSeq2 updates/merges from an iterable object producing
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99 iterable objects of length 2. If override is true, the last occurrence
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100 of a key wins, else the first. The Python dict constructor dict(seq2)
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101 is equivalent to dict={}; PyDict_MergeFromSeq(dict, seq2, 1).
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102 */
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103 PyAPI_FUNC(int) PyDict_MergeFromSeq2(PyObject *d,
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104 PyObject *seq2,
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105 int override);
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106
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107 PyAPI_FUNC(PyObject *) PyDict_GetItemString(PyObject *dp, const char *key);
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108 PyAPI_FUNC(PyObject *) _PyDict_GetItemId(PyObject *dp, struct _Py_Identifier *key);
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109 PyAPI_FUNC(int) PyDict_SetItemString(PyObject *dp, const char *key, PyObject *item);
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110 PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, struct _Py_Identifier *key, PyObject *item);
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111 PyAPI_FUNC(int) PyDict_DelItemString(PyObject *dp, const char *key);
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112
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113 #ifndef Py_LIMITED_API
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114 PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, struct _Py_Identifier *key);
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115 PyAPI_FUNC(void) _PyDict_DebugMallocStats(FILE *out);
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116
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6e5855854a2e Implement PEP 412: Key-sharing dictionaries (closes #13903)
Benjamin Peterson <benjamin@python.org>
parents: 76303
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117 int _PyObjectDict_SetItem(PyTypeObject *tp, PyObject **dictptr, PyObject *name, PyObject *value);
6e5855854a2e Implement PEP 412: Key-sharing dictionaries (closes #13903)
Benjamin Peterson <benjamin@python.org>
parents: 76303
diff changeset
118 PyObject *_PyDict_LoadGlobal(PyDictObject *, PyDictObject *, PyObject *);
6e5855854a2e Implement PEP 412: Key-sharing dictionaries (closes #13903)
Benjamin Peterson <benjamin@python.org>
parents: 76303
diff changeset
119 #endif
6e5855854a2e Implement PEP 412: Key-sharing dictionaries (closes #13903)
Benjamin Peterson <benjamin@python.org>
parents: 76303
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120
1329
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
121 #ifdef __cplusplus
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1288
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122 }
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1288
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123 #endif
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
124 #endif /* !Py_DICTOBJECT_H */