Mercurial > cpython-lru_cache-weakref

annotate Include/setobject.h @ 64166:d0e9febfa00a 3.1

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Merged revisions 84172 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r84172 | martin.v.loewis | 2010-08-18 18:12:23 +0200 (Mi, 18 Aug 2010) | 2 lines Restore GIL in nis_cat in case of error. ........
author Martin v. Löwis <martin@v.loewis.de>
date Thu, 19 Aug 2010 09:03:03 +0000
parents 2a4ceebdfcfb
children e8969fb822fc
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1 /* Set object interface */
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2
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3 #ifndef Py_SETOBJECT_H
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4 #define Py_SETOBJECT_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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9
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10 /*
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11 There are three kinds of slots in the table:
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12
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13 1. Unused: key == NULL
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14 2. Active: key != NULL and key != dummy
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15 3. Dummy: key == dummy
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16
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17 Note: .pop() abuses the hash field of an Unused or Dummy slot to
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18 hold a search finger. The hash field of Unused or Dummy slots has
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19 no meaning otherwise.
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20 */
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21
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22 #define PySet_MINSIZE 8
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23
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24 typedef struct {
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25 /* Cached hash code of the key. Note that hash codes are C longs.
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26 * We have to use Py_ssize_t instead because set_pop() abuses
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27 * the hash field to hold a search finger.
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28 */
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29 Py_ssize_t hash;
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30 PyObject *key;
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31 } setentry;
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34 /*
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35 This data structure is shared by set and frozenset objects.
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36 */
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38 typedef struct _setobject PySetObject;
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39 struct _setobject {
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40 PyObject_HEAD
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42 Py_ssize_t fill; /* # Active + # Dummy */
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43 Py_ssize_t used; /* # Active */
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44
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45 /* The table contains mask + 1 slots, and that's a power of 2.
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46 * We store the mask instead of the size because the mask is more
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47 * frequently needed.
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48 */
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49 Py_ssize_t mask;
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50
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51 /* table points to smalltable for small tables, else to
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52 * additional malloc'ed memory. table is never NULL! This rule
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53 * saves repeated runtime null-tests.
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54 */
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55 setentry *table;
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56 setentry *(*lookup)(PySetObject *so, PyObject *key, long hash);
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57 setentry smalltable[PySet_MINSIZE];
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58
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59 long hash; /* only used by frozenset objects */
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60 PyObject *weakreflist; /* List of weak references */
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61 };
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62
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63 PyAPI_DATA(PyTypeObject) PySet_Type;
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64 PyAPI_DATA(PyTypeObject) PyFrozenSet_Type;
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65 PyAPI_DATA(PyTypeObject) PySetIter_Type;
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66
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67 /* Invariants for frozensets:
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68 * data is immutable.
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69 * hash is the hash of the frozenset or -1 if not computed yet.
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70 * Invariants for sets:
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71 * hash is -1
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72 */
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73
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74 #define PyFrozenSet_CheckExact(ob) (Py_TYPE(ob) == &PyFrozenSet_Type)
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75 #define PyAnySet_CheckExact(ob) \
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76 (Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type)
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77 #define PyAnySet_Check(ob) \
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78 (Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type || \
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79 PyType_IsSubtype(Py_TYPE(ob), &PySet_Type) || \
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80 PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type))
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81 #define PySet_Check(ob) \
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82 (Py_TYPE(ob) == &PySet_Type || \
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83 PyType_IsSubtype(Py_TYPE(ob), &PySet_Type))
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84 #define PyFrozenSet_Check(ob) \
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85 (Py_TYPE(ob) == &PyFrozenSet_Type || \
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86 PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type))
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87
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88 PyAPI_FUNC(PyObject *) PySet_New(PyObject *);
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89 PyAPI_FUNC(PyObject *) PyFrozenSet_New(PyObject *);
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90 PyAPI_FUNC(Py_ssize_t) PySet_Size(PyObject *anyset);
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91 #define PySet_GET_SIZE(so) (((PySetObject *)(so))->used)
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92 PyAPI_FUNC(int) PySet_Clear(PyObject *set);
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93 PyAPI_FUNC(int) PySet_Contains(PyObject *anyset, PyObject *key);
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94 PyAPI_FUNC(int) PySet_Discard(PyObject *set, PyObject *key);
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95 PyAPI_FUNC(int) PySet_Add(PyObject *set, PyObject *key);
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96 PyAPI_FUNC(int) _PySet_NextEntry(PyObject *set, Py_ssize_t *pos, PyObject **key, long *hash);
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97 PyAPI_FUNC(PyObject *) PySet_Pop(PyObject *set);
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98 PyAPI_FUNC(int) _PySet_Update(PyObject *set, PyObject *iterable);
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99
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100 #ifdef __cplusplus
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101 }
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102 #endif
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103 #endif /* !Py_SETOBJECT_H */