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testCopysign was defined twice in test_math; combine the definitions
author Mark Dickinson <dickinsm@gmail.com>
date Sat, 06 Feb 2010 23:11:25 +0000
parents 1ecdca11eb9e
children fd25030223b0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #ifndef Py_OBJECT_H
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2 #define Py_OBJECT_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
6
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8 /* Object and type object interface */
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9
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10 /*
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11 Objects are structures allocated on the heap. Special rules apply to
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12 the use of objects to ensure they are properly garbage-collected.
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13 Objects are never allocated statically or on the stack; they must be
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14 accessed through special macros and functions only. (Type objects are
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15 exceptions to the first rule; the standard types are represented by
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16 statically initialized type objects, although work on type/class unification
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17 for Python 2.2 made it possible to have heap-allocated type objects too).
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18
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19 An object has a 'reference count' that is increased or decreased when a
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20 pointer to the object is copied or deleted; when the reference count
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21 reaches zero there are no references to the object left and it can be
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22 removed from the heap.
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23
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24 An object has a 'type' that determines what it represents and what kind
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25 of data it contains. An object's type is fixed when it is created.
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26 Types themselves are represented as objects; an object contains a
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27 pointer to the corresponding type object. The type itself has a type
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28 pointer pointing to the object representing the type 'type', which
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29 contains a pointer to itself!).
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30
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31 Objects do not float around in memory; once allocated an object keeps
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32 the same size and address. Objects that must hold variable-size data
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33 can contain pointers to variable-size parts of the object. Not all
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34 objects of the same type have the same size; but the size cannot change
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35 after allocation. (These restrictions are made so a reference to an
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36 object can be simply a pointer -- moving an object would require
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37 updating all the pointers, and changing an object's size would require
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38 moving it if there was another object right next to it.)
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39
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40 Objects are always accessed through pointers of the type 'PyObject *'.
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41 The type 'PyObject' is a structure that only contains the reference count
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42 and the type pointer. The actual memory allocated for an object
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43 contains other data that can only be accessed after casting the pointer
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44 to a pointer to a longer structure type. This longer type must start
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45 with the reference count and type fields; the macro PyObject_HEAD should be
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46 used for this (to accommodate for future changes). The implementation
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47 of a particular object type can cast the object pointer to the proper
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48 type and back.
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49
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50 A standard interface exists for objects that contain an array of items
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51 whose size is determined when the object is allocated.
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52 */
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53
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54 /* Py_DEBUG implies Py_TRACE_REFS. */
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55 #if defined(Py_DEBUG) && !defined(Py_TRACE_REFS)
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56 #define Py_TRACE_REFS
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57 #endif
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58
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59 /* Py_TRACE_REFS implies Py_REF_DEBUG. */
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60 #if defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG)
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61 #define Py_REF_DEBUG
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62 #endif
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63
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64 #ifdef Py_TRACE_REFS
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65 /* Define pointers to support a doubly-linked list of all live heap objects. */
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66 #define _PyObject_HEAD_EXTRA \
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67 struct _object *_ob_next; \
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68 struct _object *_ob_prev;
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69
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70 #define _PyObject_EXTRA_INIT 0, 0,
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71
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72 #else
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73 #define _PyObject_HEAD_EXTRA
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74 #define _PyObject_EXTRA_INIT
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75 #endif
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76
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77 /* PyObject_HEAD defines the initial segment of every PyObject. */
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78 #define PyObject_HEAD \
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79 _PyObject_HEAD_EXTRA \
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80 Py_ssize_t ob_refcnt; \
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81 struct _typeobject *ob_type;
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82
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83 #define PyObject_HEAD_INIT(type) \
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84 _PyObject_EXTRA_INIT \
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85 1, type,
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86
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87 #define PyVarObject_HEAD_INIT(type, size) \
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88 PyObject_HEAD_INIT(type) size,
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89
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90 /* PyObject_VAR_HEAD defines the initial segment of all variable-size
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91 * container objects. These end with a declaration of an array with 1
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92 * element, but enough space is malloc'ed so that the array actually
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93 * has room for ob_size elements. Note that ob_size is an element count,
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94 * not necessarily a byte count.
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95 */
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96 #define PyObject_VAR_HEAD \
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97 PyObject_HEAD \
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98 Py_ssize_t ob_size; /* Number of items in variable part */
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99 #define Py_INVALID_SIZE (Py_ssize_t)-1
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100
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101 /* Nothing is actually declared to be a PyObject, but every pointer to
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102 * a Python object can be cast to a PyObject*. This is inheritance built
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103 * by hand. Similarly every pointer to a variable-size Python object can,
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104 * in addition, be cast to PyVarObject*.
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105 */
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106 typedef struct _object {
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107 PyObject_HEAD
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108 } PyObject;
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109
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110 typedef struct {
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111 PyObject_VAR_HEAD
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112 } PyVarObject;
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113
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114 #define Py_REFCNT(ob) (((PyObject*)(ob))->ob_refcnt)
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115 #define Py_TYPE(ob) (((PyObject*)(ob))->ob_type)
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116 #define Py_SIZE(ob) (((PyVarObject*)(ob))->ob_size)
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117
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118 /*
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119 Type objects contain a string containing the type name (to help somewhat
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120 in debugging), the allocation parameters (see PyObject_New() and
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121 PyObject_NewVar()),
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122 and methods for accessing objects of the type. Methods are optional, a
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123 nil pointer meaning that particular kind of access is not available for
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124 this type. The Py_DECREF() macro uses the tp_dealloc method without
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125 checking for a nil pointer; it should always be implemented except if
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126 the implementation can guarantee that the reference count will never
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127 reach zero (e.g., for statically allocated type objects).
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128
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129 NB: the methods for certain type groups are now contained in separate
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130 method blocks.
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131 */
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132
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133 typedef PyObject * (*unaryfunc)(PyObject *);
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134 typedef PyObject * (*binaryfunc)(PyObject *, PyObject *);
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135 typedef PyObject * (*ternaryfunc)(PyObject *, PyObject *, PyObject *);
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136 typedef int (*inquiry)(PyObject *);
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137 typedef Py_ssize_t (*lenfunc)(PyObject *);
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Tim Peters <tim.peters@gmail.com>
parents: 13256
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138 typedef int (*coercion)(PyObject **, PyObject **);
36501
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139 typedef PyObject *(*intargfunc)(PyObject *, int) Py_DEPRECATED(2.5);
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140 typedef PyObject *(*intintargfunc)(PyObject *, int, int) Py_DEPRECATED(2.5);
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141 typedef PyObject *(*ssizeargfunc)(PyObject *, Py_ssize_t);
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142 typedef PyObject *(*ssizessizeargfunc)(PyObject *, Py_ssize_t, Py_ssize_t);
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Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
143 typedef int(*intobjargproc)(PyObject *, int, PyObject *);
85520c220067 Got RID of redundant coercions in longobject.c (as spotted by Greg
Tim Peters <tim.peters@gmail.com>
parents: 13256
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144 typedef int(*intintobjargproc)(PyObject *, int, int, PyObject *);
36501
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parents: 35999
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145 typedef int(*ssizeobjargproc)(PyObject *, Py_ssize_t, PyObject *);
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146 typedef int(*ssizessizeobjargproc)(PyObject *, Py_ssize_t, Py_ssize_t, PyObject *);
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Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
147 typedef int(*objobjargproc)(PyObject *, PyObject *, PyObject *);
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148
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149
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150
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151 /* int-based buffer interface */
13418
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Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
152 typedef int (*getreadbufferproc)(PyObject *, int, void **);
85520c220067 Got RID of redundant coercions in longobject.c (as spotted by Greg
Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
153 typedef int (*getwritebufferproc)(PyObject *, int, void **);
85520c220067 Got RID of redundant coercions in longobject.c (as spotted by Greg
Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
154 typedef int (*getsegcountproc)(PyObject *, int *);
36675
dba6494735d0 Revert backwards-incompatible const changes.
Martin v. Löwis <martin@v.loewis.de>
parents: 36631
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155 typedef int (*getcharbufferproc)(PyObject *, int, char **);
36501
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parents: 35999
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156 /* ssize_t-based buffer interface */
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Martin v. Löwis <martin@v.loewis.de>
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157 typedef Py_ssize_t (*readbufferproc)(PyObject *, Py_ssize_t, void **);
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158 typedef Py_ssize_t (*writebufferproc)(PyObject *, Py_ssize_t, void **);
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parents: 35999
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159 typedef Py_ssize_t (*segcountproc)(PyObject *, Py_ssize_t *);
36675
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Martin v. Löwis <martin@v.loewis.de>
parents: 36631
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160 typedef Py_ssize_t (*charbufferproc)(PyObject *, Py_ssize_t, char **);
36501
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161
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parents: 50754
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162
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163 /* Py3k buffer interface */
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164 typedef struct bufferinfo {
52749
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165 void *buf;
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Antoine Pitrou <solipsis@pitrou.net>
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166 PyObject *obj; /* owned reference */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 50754
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167 Py_ssize_t len;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 50754
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168 Py_ssize_t itemsize; /* This is Py_ssize_t so it can be
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169 pointed to by strides in simple case.*/
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170 int readonly;
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171 int ndim;
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Antoine Pitrou <solipsis@pitrou.net>
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172 char *format;
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Antoine Pitrou <solipsis@pitrou.net>
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173 Py_ssize_t *shape;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 50754
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174 Py_ssize_t *strides;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 50754
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175 Py_ssize_t *suboffsets;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 50754
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176 Py_ssize_t smalltable[2]; /* static store for shape and strides of
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parents: 50754
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177 mono-dimensional buffers. */
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parents: 50754
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178 void *internal;
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179 } Py_buffer;
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180
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181 typedef int (*getbufferproc)(PyObject *, Py_buffer *, int);
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parents: 45543
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182 typedef void (*releasebufferproc)(PyObject *, Py_buffer *);
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183
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parents: 45543
diff changeset
184 /* Flags for getting buffers */
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185 #define PyBUF_SIMPLE 0
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186 #define PyBUF_WRITABLE 0x0001
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187 /* we used to include an E, backwards compatible alias */
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188 #define PyBUF_WRITEABLE PyBUF_WRITABLE
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189 #define PyBUF_FORMAT 0x0004
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190 #define PyBUF_ND 0x0008
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191 #define PyBUF_STRIDES (0x0010 | PyBUF_ND)
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192 #define PyBUF_C_CONTIGUOUS (0x0020 | PyBUF_STRIDES)
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193 #define PyBUF_F_CONTIGUOUS (0x0040 | PyBUF_STRIDES)
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194 #define PyBUF_ANY_CONTIGUOUS (0x0080 | PyBUF_STRIDES)
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195 #define PyBUF_INDIRECT (0x0100 | PyBUF_STRIDES)
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196
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197 #define PyBUF_CONTIG (PyBUF_ND | PyBUF_WRITABLE)
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198 #define PyBUF_CONTIG_RO (PyBUF_ND)
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199
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diff changeset
200 #define PyBUF_STRIDED (PyBUF_STRIDES | PyBUF_WRITABLE)
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diff changeset
201 #define PyBUF_STRIDED_RO (PyBUF_STRIDES)
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202
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diff changeset
203 #define PyBUF_RECORDS (PyBUF_STRIDES | PyBUF_WRITABLE | PyBUF_FORMAT)
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204 #define PyBUF_RECORDS_RO (PyBUF_STRIDES | PyBUF_FORMAT)
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205
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206 #define PyBUF_FULL (PyBUF_INDIRECT | PyBUF_WRITABLE | PyBUF_FORMAT)
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207 #define PyBUF_FULL_RO (PyBUF_INDIRECT | PyBUF_FORMAT)
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208
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209
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210 #define PyBUF_READ 0x100
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211 #define PyBUF_WRITE 0x200
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212 #define PyBUF_SHADOW 0x400
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213 /* end Py3k buffer interface */
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214
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215 typedef int (*objobjproc)(PyObject *, PyObject *);
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Tim Peters <tim.peters@gmail.com>
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216 typedef int (*visitproc)(PyObject *, void *);
85520c220067 Got RID of redundant coercions in longobject.c (as spotted by Greg
Tim Peters <tim.peters@gmail.com>
parents: 13256
diff changeset
217 typedef int (*traverseproc)(PyObject *, visitproc, void *);
1746
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parents: 1400
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218
6
fc6fcd7df4f7 Initial revision
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parents:
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219 typedef struct {
15938
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
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220 /* For numbers without flag bit Py_TPFLAGS_CHECKTYPES set, all
8fd221aed357 Introduction to rich comparisons:
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221 arguments are guaranteed to be of the object's type (modulo
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
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222 coercion hacks -- i.e. if the type's coercion function
15938
8fd221aed357 Introduction to rich comparisons:
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223 returns other types, then these are allowed as well). Numbers that
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
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224 have the Py_TPFLAGS_CHECKTYPES flag bit set should check *both*
8fd221aed357 Introduction to rich comparisons:
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parents: 15716
diff changeset
225 arguments for proper type and implement the necessary conversions
8fd221aed357 Introduction to rich comparisons:
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parents: 15716
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226 in the slot functions themselves. */
15716
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
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227
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228 binaryfunc nb_add;
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229 binaryfunc nb_subtract;
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230 binaryfunc nb_multiply;
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parents: 1400
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231 binaryfunc nb_divide;
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232 binaryfunc nb_remainder;
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233 binaryfunc nb_divmod;
1770
b0dca2972b2b * Objects/{int,long,float}object.c, Include/object.h,
Guido van Rossum <guido@python.org>
parents: 1746
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234 ternaryfunc nb_power;
1746
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235 unaryfunc nb_negative;
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236 unaryfunc nb_positive;
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parents: 1400
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237 unaryfunc nb_absolute;
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parents: 1400
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238 inquiry nb_nonzero;
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parents: 1400
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239 unaryfunc nb_invert;
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parents: 1400
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240 binaryfunc nb_lshift;
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parents: 1400
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241 binaryfunc nb_rshift;
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parents: 1400
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242 binaryfunc nb_and;
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parents: 1400
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243 binaryfunc nb_xor;
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parents: 1400
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244 binaryfunc nb_or;
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245 coercion nb_coerce;
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246 unaryfunc nb_int;
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247 unaryfunc nb_long;
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248 unaryfunc nb_float;
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249 unaryfunc nb_oct;
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250 unaryfunc nb_hex;
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Fred Drake <fdrake@acm.org>
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251 /* Added in release 2.0 */
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252 binaryfunc nb_inplace_add;
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253 binaryfunc nb_inplace_subtract;
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254 binaryfunc nb_inplace_multiply;
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255 binaryfunc nb_inplace_divide;
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Thomas Wouters <thomas@python.org>
parents: 13620
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256 binaryfunc nb_inplace_remainder;
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257 ternaryfunc nb_inplace_power;
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258 binaryfunc nb_inplace_lshift;
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Thomas Wouters <thomas@python.org>
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259 binaryfunc nb_inplace_rshift;
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Thomas Wouters <thomas@python.org>
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260 binaryfunc nb_inplace_and;
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
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261 binaryfunc nb_inplace_xor;
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
diff changeset
262 binaryfunc nb_inplace_or;
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263
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264 /* Added in release 2.2 */
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265 /* The following require the Py_TPFLAGS_HAVE_CLASS flag */
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266 binaryfunc nb_floor_divide;
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267 binaryfunc nb_true_divide;
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268 binaryfunc nb_inplace_floor_divide;
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269 binaryfunc nb_inplace_true_divide;
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270
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diff changeset
271 /* Added in release 2.5 */
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272 unaryfunc nb_index;
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273 } PyNumberMethods;
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274
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275 typedef struct {
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276 lenfunc sq_length;
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277 binaryfunc sq_concat;
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278 ssizeargfunc sq_repeat;
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279 ssizeargfunc sq_item;
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280 ssizessizeargfunc sq_slice;
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281 ssizeobjargproc sq_ass_item;
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282 ssizessizeobjargproc sq_ass_slice;
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283 objobjproc sq_contains;
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284 /* Added in release 2.0 */
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285 binaryfunc sq_inplace_concat;
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286 ssizeargfunc sq_inplace_repeat;
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287 } PySequenceMethods;
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288
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289 typedef struct {
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290 lenfunc mp_length;
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291 binaryfunc mp_subscript;
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292 objobjargproc mp_ass_subscript;
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293 } PyMappingMethods;
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294
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295 typedef struct {
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296 readbufferproc bf_getreadbuffer;
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297 writebufferproc bf_getwritebuffer;
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298 segcountproc bf_getsegcount;
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299 charbufferproc bf_getcharbuffer;
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300 getbufferproc bf_getbuffer;
48308
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
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301 releasebufferproc bf_releasebuffer;
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302 } PyBufferProcs;
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303
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304
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305 typedef void (*freefunc)(void *);
13418
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306 typedef void (*destructor)(PyObject *);
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307 typedef int (*printfunc)(PyObject *, FILE *, int);
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308 typedef PyObject *(*getattrfunc)(PyObject *, char *);
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diff changeset
309 typedef PyObject *(*getattrofunc)(PyObject *, PyObject *);
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310 typedef int (*setattrfunc)(PyObject *, char *, PyObject *);
13418
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parents: 13256
diff changeset
311 typedef int (*setattrofunc)(PyObject *, PyObject *, PyObject *);
85520c220067 Got RID of redundant coercions in longobject.c (as spotted by Greg
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312 typedef int (*cmpfunc)(PyObject *, PyObject *);
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313 typedef PyObject *(*reprfunc)(PyObject *);
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parents: 13256
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314 typedef long (*hashfunc)(PyObject *);
15938
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315 typedef PyObject *(*richcmpfunc) (PyObject *, PyObject *, int);
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316 typedef PyObject *(*getiterfunc) (PyObject *);
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317 typedef PyObject *(*iternextfunc) (PyObject *);
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318 typedef PyObject *(*descrgetfunc) (PyObject *, PyObject *, PyObject *);
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319 typedef int (*descrsetfunc) (PyObject *, PyObject *, PyObject *);
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320 typedef int (*initproc)(PyObject *, PyObject *, PyObject *);
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321 typedef PyObject *(*newfunc)(struct _typeobject *, PyObject *, PyObject *);
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322 typedef PyObject *(*allocfunc)(struct _typeobject *, Py_ssize_t);
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323
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324 typedef struct _typeobject {
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325 PyObject_VAR_HEAD
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326 const char *tp_name; /* For printing, in format "<module>.<name>" */
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327 Py_ssize_t tp_basicsize, tp_itemsize; /* For allocation */
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328
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329 /* Methods to implement standard operations */
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diff changeset
330
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331 destructor tp_dealloc;
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parents: 1400
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332 printfunc tp_print;
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parents: 1400
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333 getattrfunc tp_getattr;
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parents: 1400
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334 setattrfunc tp_setattr;
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335 cmpfunc tp_compare;
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parents: 1400
diff changeset
336 reprfunc tp_repr;
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337
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338 /* Method suites for standard classes */
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diff changeset
339
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340 PyNumberMethods *tp_as_number;
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341 PySequenceMethods *tp_as_sequence;
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342 PyMappingMethods *tp_as_mapping;
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
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parents: 1049
diff changeset
343
12026
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parents: 11999
diff changeset
344 /* More standard operations (here for binary compatibility) */
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345
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346 hashfunc tp_hash;
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347 ternaryfunc tp_call;
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parents: 2058
diff changeset
348 reprfunc tp_str;
3983
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parents: 3605
diff changeset
349 getattrofunc tp_getattro;
44902516614a Added tp_getattro, tp_setattro (Sjoerd)
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parents: 3605
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350 setattrofunc tp_setattro;
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351
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diff changeset
352 /* Functions to access object as input/output buffer */
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353 PyBufferProcs *tp_as_buffer;
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354
9304
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
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diff changeset
355 /* Flags to define presence of optional/expanded features */
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356 long tp_flags;
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357
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358 const char *tp_doc; /* Documentation string */
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parents: 2058
diff changeset
359
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diff changeset
360 /* Assigned meaning in release 2.0 */
12990
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361 /* call function for all accessible objects */
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362 traverseproc tp_traverse;
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parents: 24121
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363
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diff changeset
364 /* delete references to contained objects */
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parents: 12481
diff changeset
365 inquiry tp_clear;
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parents: 12481
diff changeset
366
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parents: 19134
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367 /* Assigned meaning in release 2.1 */
15938
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diff changeset
368 /* rich comparisons */
8fd221aed357 Introduction to rich comparisons:
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369 richcmpfunc tp_richcompare;
8fd221aed357 Introduction to rich comparisons:
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370
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents: 16235
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371 /* weak reference enabler */
36517
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372 Py_ssize_t tp_weaklistoffset;
8124
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parents: 7983
diff changeset
373
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374 /* Added in release 2.2 */
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375 /* Iterators */
32e7d0898eab Iterators phase 1. This comprises:
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diff changeset
376 getiterfunc tp_iter;
17617
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parents: 17597
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377 iternextfunc tp_iternext;
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parents: 16768
diff changeset
378
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379 /* Attribute descriptor and subclassing stuff */
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diff changeset
380 struct PyMethodDef *tp_methods;
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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parents: 19970
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381 struct PyMemberDef *tp_members;
20015
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Guido van Rossum <guido@python.org>
parents: 20012
diff changeset
382 struct PyGetSetDef *tp_getset;
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383 struct _typeobject *tp_base;
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384 PyObject *tp_dict;
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385 descrgetfunc tp_descr_get;
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386 descrsetfunc tp_descr_set;
36517
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parents: 36501
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387 Py_ssize_t tp_dictoffset;
18933
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parents: 17617
diff changeset
388 initproc tp_init;
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389 allocfunc tp_alloc;
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390 newfunc tp_new;
22969
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 22785
diff changeset
391 freefunc tp_free; /* Low-level free-memory routine */
20220
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parents: 20015
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392 inquiry tp_is_gc; /* For PyObject_IS_GC */
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393 PyObject *tp_bases;
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394 PyObject *tp_mro; /* method resolution order */
20445
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395 PyObject *tp_cache;
20315
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parents: 20284
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396 PyObject *tp_subclasses;
7b41f7a2e528 Keep track of a type's subclasses (subtypes), in tp_subclasses, which
Guido van Rossum <guido@python.org>
parents: 20284
diff changeset
397 PyObject *tp_weaklist;
24678
71dca7c76fa2 A modest speedup of object deallocation. call_finalizer() did rather
Guido van Rossum <guido@python.org>
parents: 24654
diff changeset
398 destructor tp_del;
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
399
44664
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
400 /* Type attribute cache version tag. Added in version 2.6 */
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
401 unsigned int tp_version_tag;
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
402
1347
a22a350d3a5d * Extended X interface: pixmap objects, colormap objects visual objects,
Sjoerd Mullender <sjoerd@acm.org>
parents: 1329
diff changeset
403 #ifdef COUNT_ALLOCS
17597
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
404 /* these must be last and never explicitly initialized */
36748
c2942cdd88b3 Make ob_refcnt and tp_maxalloc (and friends) Py_ssize_t.
Martin v. Löwis <martin@v.loewis.de>
parents: 36675
diff changeset
405 Py_ssize_t tp_allocs;
c2942cdd88b3 Make ob_refcnt and tp_maxalloc (and friends) Py_ssize_t.
Martin v. Löwis <martin@v.loewis.de>
parents: 36675
diff changeset
406 Py_ssize_t tp_frees;
c2942cdd88b3 Make ob_refcnt and tp_maxalloc (and friends) Py_ssize_t.
Martin v. Löwis <martin@v.loewis.de>
parents: 36675
diff changeset
407 Py_ssize_t tp_maxalloc;
37831
d82dced6f1fa Remove types from type_list if they have no objects
Martin v. Löwis <martin@v.loewis.de>
parents: 37726
diff changeset
408 struct _typeobject *tp_prev;
1347
a22a350d3a5d * Extended X interface: pixmap objects, colormap objects visual objects,
Sjoerd Mullender <sjoerd@acm.org>
parents: 1329
diff changeset
409 struct _typeobject *tp_next;
a22a350d3a5d * Extended X interface: pixmap objects, colormap objects visual objects,
Sjoerd Mullender <sjoerd@acm.org>
parents: 1329
diff changeset
410 #endif
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
411 } PyTypeObject;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
412
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
413
28219
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
414 /* The *real* layout of a type object when allocated on the heap */
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
415 typedef struct _heaptypeobject {
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
416 /* Note: there's a dependency on the order of these members
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
417 in slotptr() in typeobject.c . */
36631
49d9c120357a Bug #1086854: Rename PyHeapType members adding ht_ prefix.
Georg Brandl <georg@python.org>
parents: 36517
diff changeset
418 PyTypeObject ht_type;
28219
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
419 PyNumberMethods as_number;
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
420 PyMappingMethods as_mapping;
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
421 PySequenceMethods as_sequence; /* as_sequence comes after as_mapping,
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
422 so that the mapping wins when both
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
423 the mapping and the sequence define
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
424 a given operator (e.g. __getitem__).
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
425 see add_operators() in typeobject.c . */
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
426 PyBufferProcs as_buffer;
36631
49d9c120357a Bug #1086854: Rename PyHeapType members adding ht_ prefix.
Georg Brandl <georg@python.org>
parents: 36517
diff changeset
427 PyObject *ht_name, *ht_slots;
28219
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
428 /* here are optional user slots, followed by the members. */
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
429 } PyHeapTypeObject;
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
430
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
431 /* access macro to the members which are floating "behind" the object */
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
432 #define PyHeapType_GET_MEMBERS(etype) \
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
433 ((PyMemberDef *)(((char *)etype) + Py_TYPE(etype)->tp_basicsize))
28219
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
434
7c8e8807aed2 - The extended type structure used for heap types (new-style
Guido van Rossum <guido@python.org>
parents: 26263
diff changeset
435
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
436 /* Generic type check */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
437 PyAPI_FUNC(int) PyType_IsSubtype(PyTypeObject *, PyTypeObject *);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
438 #define PyObject_TypeCheck(ob, tp) \
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
439 (Py_TYPE(ob) == (tp) || PyType_IsSubtype(Py_TYPE(ob), (tp)))
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
440
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
441 PyAPI_DATA(PyTypeObject) PyType_Type; /* built-in 'type' */
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
442 PyAPI_DATA(PyTypeObject) PyBaseObject_Type; /* built-in 'object' */
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
443 PyAPI_DATA(PyTypeObject) PySuper_Type; /* built-in 'super' */
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
444
40908
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
445 #define PyType_Check(op) \
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
446 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TYPE_SUBCLASS)
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
447 #define PyType_CheckExact(op) (Py_TYPE(op) == &PyType_Type)
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
448
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
449 PyAPI_FUNC(int) PyType_Ready(PyTypeObject *);
36501
7fdc639bc5b4 Merge ssize_t branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 35999
diff changeset
450 PyAPI_FUNC(PyObject *) PyType_GenericAlloc(PyTypeObject *, Py_ssize_t);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
451 PyAPI_FUNC(PyObject *) PyType_GenericNew(PyTypeObject *,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
452 PyObject *, PyObject *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
453 PyAPI_FUNC(PyObject *) _PyType_Lookup(PyTypeObject *, PyObject *);
53904
1ecdca11eb9e add _PyObject_LookupSpecial to handle fetching special method lookup
Benjamin Peterson <benjamin@python.org>
parents: 52899
diff changeset
454 PyAPI_FUNC(PyObject *) _PyObject_LookupSpecial(PyObject *, char *, PyObject **);
45025
ea3fe302d392 Added clear cache methods to clear the internal type lookup cache for ref leak test runs.
Christian Heimes <christian@cheimes.de>
parents: 44664
diff changeset
455 PyAPI_FUNC(unsigned int) PyType_ClearCache(void);
47358
93fe913fae55 #2989: add PyType_Modified().
Georg Brandl <georg@python.org>
parents: 47294
diff changeset
456 PyAPI_FUNC(void) PyType_Modified(PyTypeObject *);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
457
86
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
458 /* Generic operations on objects */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
459 PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
460 PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
461 PyAPI_FUNC(PyObject *) PyObject_Repr(PyObject *);
35331
ef11cbc08dab Change the %s format specifier for str objects so that it returns a
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 33541
diff changeset
462 PyAPI_FUNC(PyObject *) _PyObject_Str(PyObject *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
463 PyAPI_FUNC(PyObject *) PyObject_Str(PyObject *);
48872
edd2ca894a67 sort of backport 66038 by aliasing PyObject_Bytes to PyObject_Str
Benjamin Peterson <benjamin@python.org>
parents: 48308
diff changeset
464 #define PyObject_Bytes PyObject_Str
19343
7257e87e0720 Patch #445762: Support --disable-unicode
Martin v. Löwis <martin@v.loewis.de>
parents: 19283
diff changeset
465 #ifdef Py_USING_UNICODE
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
466 PyAPI_FUNC(PyObject *) PyObject_Unicode(PyObject *);
19343
7257e87e0720 Patch #445762: Support --disable-unicode
Martin v. Löwis <martin@v.loewis.de>
parents: 19283
diff changeset
467 #endif
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
468 PyAPI_FUNC(int) PyObject_Compare(PyObject *, PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
469 PyAPI_FUNC(PyObject *) PyObject_RichCompare(PyObject *, PyObject *, int);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
470 PyAPI_FUNC(int) PyObject_RichCompareBool(PyObject *, PyObject *, int);
35999
9541369b0dca Add const to several API functions that take char *.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 35331
diff changeset
471 PyAPI_FUNC(PyObject *) PyObject_GetAttrString(PyObject *, const char *);
9541369b0dca Add const to several API functions that take char *.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 35331
diff changeset
472 PyAPI_FUNC(int) PyObject_SetAttrString(PyObject *, const char *, PyObject *);
9541369b0dca Add const to several API functions that take char *.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 35331
diff changeset
473 PyAPI_FUNC(int) PyObject_HasAttrString(PyObject *, const char *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
474 PyAPI_FUNC(PyObject *) PyObject_GetAttr(PyObject *, PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
475 PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
476 PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
477 PyAPI_FUNC(PyObject **) _PyObject_GetDictPtr(PyObject *);
28320
fd5ef7003469 Renamed PyObject_GenericGetIter to PyObject_SelfIter
Raymond Hettinger <python@rcn.com>
parents: 28308
diff changeset
478 PyAPI_FUNC(PyObject *) PyObject_SelfIter(PyObject *);
50754
e9748db47635 #3720: Interpreter crashes when an evil iterator removes its own next function.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48872
diff changeset
479 PyAPI_FUNC(PyObject *) _PyObject_NextNotImplemented(PyObject *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
480 PyAPI_FUNC(PyObject *) PyObject_GenericGetAttr(PyObject *, PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
481 PyAPI_FUNC(int) PyObject_GenericSetAttr(PyObject *,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
482 PyObject *, PyObject *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
483 PyAPI_FUNC(long) PyObject_Hash(PyObject *);
47961
f9b80a820a25 Issue 2235: __hash__ is once again inherited by default, but inheritance can be blocked explicitly so that collections.Hashable remains meaningful
Nick Coghlan <ncoghlan@gmail.com>
parents: 47948
diff changeset
484 PyAPI_FUNC(long) PyObject_HashNotImplemented(PyObject *);
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
485 PyAPI_FUNC(int) PyObject_IsTrue(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
486 PyAPI_FUNC(int) PyObject_Not(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
487 PyAPI_FUNC(int) PyCallable_Check(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
488 PyAPI_FUNC(int) PyNumber_Coerce(PyObject **, PyObject **);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
489 PyAPI_FUNC(int) PyNumber_CoerceEx(PyObject **, PyObject **);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
490
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
491 PyAPI_FUNC(void) PyObject_ClearWeakRefs(PyObject *);
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents: 16235
diff changeset
492
19970
f761cab28c1c Hopefully fix 3-way comparisons. This unfortunately adds yet another
Guido van Rossum <guido@python.org>
parents: 19705
diff changeset
493 /* A slot function whose address we need to compare */
f761cab28c1c Hopefully fix 3-way comparisons. This unfortunately adds yet another
Guido van Rossum <guido@python.org>
parents: 19705
diff changeset
494 extern int _PyObject_SlotCompare(PyObject *, PyObject *);
f761cab28c1c Hopefully fix 3-way comparisons. This unfortunately adds yet another
Guido van Rossum <guido@python.org>
parents: 19705
diff changeset
495
f761cab28c1c Hopefully fix 3-way comparisons. This unfortunately adds yet another
Guido van Rossum <guido@python.org>
parents: 19705
diff changeset
496
19705
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
497 /* PyObject_Dir(obj) acts like Python __builtin__.dir(obj), returning a
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
498 list of strings. PyObject_Dir(NULL) is like __builtin__.dir(),
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
499 returning the names of the current locals. In this case, if there are
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
500 no current locals, NULL is returned, and PyErr_Occurred() is false.
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
501 */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
502 PyAPI_FUNC(PyObject *) PyObject_Dir(PyObject *);
19705
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
503
b7f6fbc087a7 At Guido's suggestion, here's a new C API function, PyObject_Dir(), like
Tim Peters <tim.peters@gmail.com>
parents: 19576
diff changeset
504
7983
068303f925ea Add prototypes for Py_Repr{Enter,Leave}.
Guido van Rossum <guido@python.org>
parents: 7935
diff changeset
505 /* Helpers for printing recursive container types */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
506 PyAPI_FUNC(int) Py_ReprEnter(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
507 PyAPI_FUNC(void) Py_ReprLeave(PyObject *);
7983
068303f925ea Add prototypes for Py_Repr{Enter,Leave}.
Guido van Rossum <guido@python.org>
parents: 7935
diff changeset
508
13141
cca84745da3e This patch addresses two main issues: (1) There exist some non-fatal
Fred Drake <fdrake@acm.org>
parents: 12993
diff changeset
509 /* Helpers for hash functions */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
510 PyAPI_FUNC(long) _Py_HashDouble(double);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
511 PyAPI_FUNC(long) _Py_HashPointer(void*);
13141
cca84745da3e This patch addresses two main issues: (1) There exist some non-fatal
Fred Drake <fdrake@acm.org>
parents: 12993
diff changeset
512
16394
f700e6b8de1f Undo recent change that banned using import to bind a global, as per
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16385
diff changeset
513 /* Helper for passing objects to printf and the like */
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47504
diff changeset
514 #define PyObject_REPR(obj) PyString_AS_STRING(PyObject_Repr(obj))
16394
f700e6b8de1f Undo recent change that banned using import to bind a global, as per
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16385
diff changeset
515
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
516 /* Flag bits for printing: */
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
517 #define Py_PRINT_RAW 1 /* No string quotes etc. */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
518
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
519 /*
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
520 `Type flags (tp_flags)
9304
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
521
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
522 These flags are used to extend the type structure in a backwards-compatible
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
523 fashion. Extensions can use the flags to indicate (and test) when a given
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
524 type structure contains a new feature. The Python core will use these when
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
525 introducing new functionality between major revisions (to avoid mid-version
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
526 changes in the PYTHON_API_VERSION).
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
527
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
528 Arbitration of the flag bit positions will need to be coordinated among
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
529 all extension writers who publically release their extensions (this will
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
530 be fewer than you might expect!)..
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
531
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
532 Python 1.5.2 introduced the bf_getcharbuffer slot into PyBufferProcs.
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
533
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
534 Type definitions should use Py_TPFLAGS_DEFAULT for their tp_flags value.
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
535
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
536 Code can use PyType_HasFeature(type_ob, flag_value) to test whether the
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
537 given type object has a specified feature.
48308
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
538
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
539 NOTE: when building the core, Py_TPFLAGS_DEFAULT includes
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
540 Py_TPFLAGS_HAVE_VERSION_TAG; outside the core, it doesn't. This is so
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
541 that extensions that modify tp_dict of their own types directly don't
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
542 break, since this was allowed in 2.5. In 3.0 they will have to
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
543 manually remove this flag though!
9304
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
544 */
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
545
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
546 /* PyBufferProcs contains bf_getcharbuffer */
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
547 #define Py_TPFLAGS_HAVE_GETCHARBUFFER (1L<<0)
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
548
11867
06104bcf06a6 Patch by Mozhe Zadka, for __contains__ (overloading 'in'). This adds
Guido van Rossum <guido@python.org>
parents: 11673
diff changeset
549 /* PySequenceMethods contains sq_contains */
06104bcf06a6 Patch by Mozhe Zadka, for __contains__ (overloading 'in'). This adds
Guido van Rossum <guido@python.org>
parents: 11673
diff changeset
550 #define Py_TPFLAGS_HAVE_SEQUENCE_IN (1L<<1)
06104bcf06a6 Patch by Mozhe Zadka, for __contains__ (overloading 'in'). This adds
Guido van Rossum <guido@python.org>
parents: 11673
diff changeset
551
19576
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
552 /* This is here for backwards compatibility. Extensions that use the old GC
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
553 * API will still compile but the objects will not be tracked by the GC. */
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
554 #define Py_TPFLAGS_GC 0 /* used to be (1L<<2) */
12993
8f79c5b69e0a part 2 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12990
diff changeset
555
14162
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
diff changeset
556 /* PySequenceMethods and PyNumberMethods contain in-place operators */
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
diff changeset
557 #define Py_TPFLAGS_HAVE_INPLACEOPS (1L<<3)
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
diff changeset
558
15716
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
559 /* PyNumberMethods do their own coercion */
15938
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
560 #define Py_TPFLAGS_CHECKTYPES (1L<<4)
15716
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
561
17597
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
562 /* tp_richcompare is defined */
16235
5c60184f7f52 Add a flag to indicate the presence of the tp_richcompare field, and
Guido van Rossum <guido@python.org>
parents: 16195
diff changeset
563 #define Py_TPFLAGS_HAVE_RICHCOMPARE (1L<<5)
5c60184f7f52 Add a flag to indicate the presence of the tp_richcompare field, and
Guido van Rossum <guido@python.org>
parents: 16195
diff changeset
564
16420
38204093d9c9 Use a type flag to determine the applicability of the tp_weaklistoffset
Fred Drake <fdrake@acm.org>
parents: 16394
diff changeset
565 /* Objects which are weakly referencable if their tp_weaklistoffset is >0 */
38204093d9c9 Use a type flag to determine the applicability of the tp_weaklistoffset
Fred Drake <fdrake@acm.org>
parents: 16394
diff changeset
566 #define Py_TPFLAGS_HAVE_WEAKREFS (1L<<6)
38204093d9c9 Use a type flag to determine the applicability of the tp_weaklistoffset
Fred Drake <fdrake@acm.org>
parents: 16394
diff changeset
567
17597
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
568 /* tp_iter is defined */
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
569 #define Py_TPFLAGS_HAVE_ITER (1L<<7)
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
570
19051
f20727cc3d0f Implement PEP 238 in its (almost) full glory.
Guido van Rossum <guido@python.org>
parents: 19040
diff changeset
571 /* New members introduced by Python 2.2 exist */
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
572 #define Py_TPFLAGS_HAVE_CLASS (1L<<8)
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
573
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
574 /* Set if the type object is dynamically allocated */
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
575 #define Py_TPFLAGS_HEAPTYPE (1L<<9)
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
576
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
577 /* Set if the type allows subclassing */
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
578 #define Py_TPFLAGS_BASETYPE (1L<<10)
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
579
19134
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
580 /* Set if the type is 'ready' -- fully initialized */
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
581 #define Py_TPFLAGS_READY (1L<<12)
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
582
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
583 /* Set while the type is being 'readied', to prevent recursive ready calls */
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
584 #define Py_TPFLAGS_READYING (1L<<13)
d98121930e70 Add new flags for PyType_Ready(): READY to explicitly indicate the
Guido van Rossum <guido@python.org>
parents: 19051
diff changeset
585
19576
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
586 /* Objects support garbage collection (see objimp.h) */
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
587 #define Py_TPFLAGS_HAVE_GC (1L<<14)
b67309407cfc Change the GC type flag since the API has changed. Allow types using
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 19470
diff changeset
588
36882
6a9c7165b17b Checking in the code for PEP 357.
Guido van Rossum <guido@python.org>
parents: 36837
diff changeset
589 /* These two bits are preserved for Stackless Python, next after this is 17 */
29184
9aa06cbd9cc1 Preserved one bit in type objects for Stackless.
Christian Tismer <tismer@stackless.com>
parents: 28653
diff changeset
590 #ifdef STACKLESS
29245
ca0c8137de84 After Raymond's remark, I changed the Stackless bits to
Christian Tismer <tismer@stackless.com>
parents: 29240
diff changeset
591 #define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION (3L<<15)
29184
9aa06cbd9cc1 Preserved one bit in type objects for Stackless.
Christian Tismer <tismer@stackless.com>
parents: 28653
diff changeset
592 #else
29240
e721025cca09 Generalized my type flags structure extension without being specific about
Christian Tismer <tismer@stackless.com>
parents: 29184
diff changeset
593 #define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION 0
29184
9aa06cbd9cc1 Preserved one bit in type objects for Stackless.
Christian Tismer <tismer@stackless.com>
parents: 28653
diff changeset
594 #endif
9aa06cbd9cc1 Preserved one bit in type objects for Stackless.
Christian Tismer <tismer@stackless.com>
parents: 28653
diff changeset
595
36882
6a9c7165b17b Checking in the code for PEP 357.
Guido van Rossum <guido@python.org>
parents: 36837
diff changeset
596 /* Objects support nb_index in PyNumberMethods */
6a9c7165b17b Checking in the code for PEP 357.
Guido van Rossum <guido@python.org>
parents: 36837
diff changeset
597 #define Py_TPFLAGS_HAVE_INDEX (1L<<17)
6a9c7165b17b Checking in the code for PEP 357.
Guido van Rossum <guido@python.org>
parents: 36837
diff changeset
598
44664
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
599 /* Objects support type attribute cache */
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
600 #define Py_TPFLAGS_HAVE_VERSION_TAG (1L<<18)
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
601 #define Py_TPFLAGS_VALID_VERSION_TAG (1L<<19)
387d48c3a0b3 Re-apply patch #1700288 (first applied in r59931, rolled back in r59940)
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 44661
diff changeset
602
45543
6592e5a90c2c Move abc._Abstract into object by adding a new flag Py_TPFLAGS_IS_ABSTRACT,
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 45025
diff changeset
603 /* Type is abstract and cannot be instantiated */
6592e5a90c2c Move abc._Abstract into object by adding a new flag Py_TPFLAGS_IS_ABSTRACT,
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 45025
diff changeset
604 #define Py_TPFLAGS_IS_ABSTRACT (1L<<20)
6592e5a90c2c Move abc._Abstract into object by adding a new flag Py_TPFLAGS_IS_ABSTRACT,
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 45025
diff changeset
605
45793
f11c00246fb5 Add necessary headers to back-port new buffer protocol to Python 2.6
Travis E. Oliphant <oliphant@enthought.com>
parents: 45543
diff changeset
606 /* Has the new buffer protocol */
f11c00246fb5 Add necessary headers to back-port new buffer protocol to Python 2.6
Travis E. Oliphant <oliphant@enthought.com>
parents: 45543
diff changeset
607 #define Py_TPFLAGS_HAVE_NEWBUFFER (1L<<21)
f11c00246fb5 Add necessary headers to back-port new buffer protocol to Python 2.6
Travis E. Oliphant <oliphant@enthought.com>
parents: 45543
diff changeset
608
40908
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
609 /* These flags are used to determine if a type is a subclass. */
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
610 #define Py_TPFLAGS_INT_SUBCLASS (1L<<23)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
611 #define Py_TPFLAGS_LONG_SUBCLASS (1L<<24)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
612 #define Py_TPFLAGS_LIST_SUBCLASS (1L<<25)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
613 #define Py_TPFLAGS_TUPLE_SUBCLASS (1L<<26)
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47504
diff changeset
614 #define Py_TPFLAGS_STRING_SUBCLASS (1L<<27)
40908
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
615 #define Py_TPFLAGS_UNICODE_SUBCLASS (1L<<28)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
616 #define Py_TPFLAGS_DICT_SUBCLASS (1L<<29)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
617 #define Py_TPFLAGS_BASE_EXC_SUBCLASS (1L<<30)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
618 #define Py_TPFLAGS_TYPE_SUBCLASS (1L<<31)
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
619
48308
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
620 #define Py_TPFLAGS_DEFAULT_EXTERNAL ( \
16235
5c60184f7f52 Add a flag to indicate the presence of the tp_richcompare field, and
Guido van Rossum <guido@python.org>
parents: 16195
diff changeset
621 Py_TPFLAGS_HAVE_GETCHARBUFFER | \
14162
27d7d89c774b The real suport for augmented assignment: new opcodes, new PyNumber and
Thomas Wouters <thomas@python.org>
parents: 13620
diff changeset
622 Py_TPFLAGS_HAVE_SEQUENCE_IN | \
16235
5c60184f7f52 Add a flag to indicate the presence of the tp_richcompare field, and
Guido van Rossum <guido@python.org>
parents: 16195
diff changeset
623 Py_TPFLAGS_HAVE_INPLACEOPS | \
5c60184f7f52 Add a flag to indicate the presence of the tp_richcompare field, and
Guido van Rossum <guido@python.org>
parents: 16195
diff changeset
624 Py_TPFLAGS_HAVE_RICHCOMPARE | \
16420
38204093d9c9 Use a type flag to determine the applicability of the tp_weaklistoffset
Fred Drake <fdrake@acm.org>
parents: 16394
diff changeset
625 Py_TPFLAGS_HAVE_WEAKREFS | \
17597
32e7d0898eab Iterators phase 1. This comprises:
Guido van Rossum <guido@python.org>
parents: 16768
diff changeset
626 Py_TPFLAGS_HAVE_ITER | \
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 17617
diff changeset
627 Py_TPFLAGS_HAVE_CLASS | \
29240
e721025cca09 Generalized my type flags structure extension without being specific about
Christian Tismer <tismer@stackless.com>
parents: 29184
diff changeset
628 Py_TPFLAGS_HAVE_STACKLESS_EXTENSION | \
36882
6a9c7165b17b Checking in the code for PEP 357.
Guido van Rossum <guido@python.org>
parents: 36837
diff changeset
629 Py_TPFLAGS_HAVE_INDEX | \
48308
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
630 0)
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
631 #define Py_TPFLAGS_DEFAULT_CORE (Py_TPFLAGS_DEFAULT_EXTERNAL | \
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
632 Py_TPFLAGS_HAVE_VERSION_TAG)
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
633
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
634 #ifdef Py_BUILD_CORE
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
635 #define Py_TPFLAGS_DEFAULT Py_TPFLAGS_DEFAULT_CORE
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
636 #else
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
637 #define Py_TPFLAGS_DEFAULT Py_TPFLAGS_DEFAULT_EXTERNAL
96a4cda65c55 Hopeful fix for issue 1878: remove Py_TPFLAGS_HAVE_VERSION_TAG from
Guido van Rossum <guido@python.org>
parents: 48221
diff changeset
638 #endif
9304
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
639
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
640 #define PyType_HasFeature(t,f) (((t)->tp_flags & (f)) != 0)
40908
d01bd37bf5ce Variation of patch # 1624059 to speed up checking if an object is a subclass
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
641 #define PyType_FastSubclass(t,f) PyType_HasFeature(t,f)
9304
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
642
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
643
cc3e14837379 Changes by Greg Stein (code) and GvR (design).
Guido van Rossum <guido@python.org>
parents: 8124
diff changeset
644 /*
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
645 The macros Py_INCREF(op) and Py_DECREF(op) are used to increment or decrement
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
646 reference counts. Py_DECREF calls the object's deallocator function when
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
647 the refcount falls to 0; for
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
648 objects that don't contain references to other objects or heap memory
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
649 this can be the standard function free(). Both macros can be used
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
650 wherever a void expression is allowed. The argument must not be a
46175
efef4e3fed17 NIL => NULL
Benjamin Peterson <benjamin@python.org>
parents: 45793
diff changeset
651 NULL pointer. If it may be NULL, use Py_XINCREF/Py_XDECREF instead.
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
652 The macro _Py_NewReference(op) initialize reference counts to 1, and
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
653 in special builds (Py_REF_DEBUG, Py_TRACE_REFS) performs additional
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
654 bookkeeping appropriate to the special build.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
655
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
656 We assume that the reference count field can never overflow; this can
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
657 be proven when the size of the field is the same as the pointer size, so
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
658 we ignore the possibility. Provided a C int is at least 32 bits (which
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
659 is implicitly assumed in many parts of this code), that's enough for
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
660 about 2**31 references to an object.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
661
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
662 XXX The following became out of date in Python 2.2, but I'm not sure
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
663 XXX what the full truth is now. Certainly, heap-allocated type objects
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
664 XXX can and should be deallocated.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
665 Type objects should never be deallocated; the type pointer in an object
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
666 is not considered to be a reference to the type object, to save
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
667 complications in the deallocation function. (This is actually a
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
668 decision that's up to the implementer of each new type so if you want,
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
669 you can count such references to the type object.)
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
670
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
671 *** WARNING*** The Py_DECREF macro must have a side-effect-free argument
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
672 since it may evaluate its argument multiple times. (The alternative
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
673 would be to mace it a proper function or assign it to a global temporary
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
674 variable first, both of which are slower; and in a multi-threaded
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
675 environment the global variable trick is not safe.)
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
676 */
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
677
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
678 /* First define a pile of simple helper macros, one set per special
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
679 * build symbol. These either expand to the obvious things, or to
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
680 * nothing at all when the special mode isn't in effect. The main
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
681 * macros can later be defined just once then, yet expand to different
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
682 * things depending on which special build options are and aren't in effect.
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
683 * Trust me <wink>: while painful, this is 20x easier to understand than,
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
684 * e.g, defining _Py_NewReference five different times in a maze of nested
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
685 * #ifdefs (we used to do that -- it was impenetrable).
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
686 */
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
687 #ifdef Py_REF_DEBUG
36837
3a3aed49b245 Use Py_ssize_t for _Py_RefTotal.
Neal Norwitz <nnorwitz@gmail.com>
parents: 36748
diff changeset
688 PyAPI_DATA(Py_ssize_t) _Py_RefTotal;
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
689 PyAPI_FUNC(void) _Py_NegativeRefcount(const char *fname,
24155
9456a2ccda61 The Py_REF_DEBUG/COUNT_ALLOCS/Py_TRACE_REFS macro minefield: added
Tim Peters <tim.peters@gmail.com>
parents: 24126
diff changeset
690 int lineno, PyObject *op);
37638
65ecb83ea7dd Ignore the references to the dummy objects used as deleted keys
Armin Rigo <arigo@tunes.org>
parents: 36882
diff changeset
691 PyAPI_FUNC(PyObject *) _PyDict_Dummy(void);
65ecb83ea7dd Ignore the references to the dummy objects used as deleted keys
Armin Rigo <arigo@tunes.org>
parents: 36882
diff changeset
692 PyAPI_FUNC(PyObject *) _PySet_Dummy(void);
65ecb83ea7dd Ignore the references to the dummy objects used as deleted keys
Armin Rigo <arigo@tunes.org>
parents: 36882
diff changeset
693 PyAPI_FUNC(Py_ssize_t) _Py_GetRefTotal(void);
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
694 #define _Py_INC_REFTOTAL _Py_RefTotal++
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
695 #define _Py_DEC_REFTOTAL _Py_RefTotal--
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
696 #define _Py_REF_DEBUG_COMMA ,
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
697 #define _Py_CHECK_REFCNT(OP) \
42333
6620a510e9a9 PEP 3123: Provide forward compatibility with Python 3.0, while keeping
Martin v. Löwis <martin@v.loewis.de>
parents: 40908
diff changeset
698 { if (((PyObject*)OP)->ob_refcnt < 0) \
24155
9456a2ccda61 The Py_REF_DEBUG/COUNT_ALLOCS/Py_TRACE_REFS macro minefield: added
Tim Peters <tim.peters@gmail.com>
parents: 24126
diff changeset
699 _Py_NegativeRefcount(__FILE__, __LINE__, \
9456a2ccda61 The Py_REF_DEBUG/COUNT_ALLOCS/Py_TRACE_REFS macro minefield: added
Tim Peters <tim.peters@gmail.com>
parents: 24126
diff changeset
700 (PyObject *)(OP)); \
9456a2ccda61 The Py_REF_DEBUG/COUNT_ALLOCS/Py_TRACE_REFS macro minefield: added
Tim Peters <tim.peters@gmail.com>
parents: 24126
diff changeset
701 }
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
702 #else
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
703 #define _Py_INC_REFTOTAL
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
704 #define _Py_DEC_REFTOTAL
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
705 #define _Py_REF_DEBUG_COMMA
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
706 #define _Py_CHECK_REFCNT(OP) /* a semicolon */;
24171
5e4b8d1e9fd6 Uglified the new Py_REF_DEBUG (etc) lexical helper macro definitions so
Tim Peters <tim.peters@gmail.com>
parents: 24155
diff changeset
707 #endif /* Py_REF_DEBUG */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
708
1347
a22a350d3a5d * Extended X interface: pixmap objects, colormap objects visual objects,
Sjoerd Mullender <sjoerd@acm.org>
parents: 1329
diff changeset
709 #ifdef COUNT_ALLOCS
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
710 PyAPI_FUNC(void) inc_count(PyTypeObject *);
37831
d82dced6f1fa Remove types from type_list if they have no objects
Martin v. Löwis <martin@v.loewis.de>
parents: 37726
diff changeset
711 PyAPI_FUNC(void) dec_count(PyTypeObject *);
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
712 #define _Py_INC_TPALLOCS(OP) inc_count(Py_TYPE(OP))
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
713 #define _Py_INC_TPFREES(OP) dec_count(Py_TYPE(OP))
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
714 #define _Py_DEC_TPFREES(OP) Py_TYPE(OP)->tp_frees--
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
715 #define _Py_COUNT_ALLOCS_COMMA ,
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
716 #else
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
717 #define _Py_INC_TPALLOCS(OP)
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
718 #define _Py_INC_TPFREES(OP)
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
719 #define _Py_DEC_TPFREES(OP)
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
720 #define _Py_COUNT_ALLOCS_COMMA
24171
5e4b8d1e9fd6 Uglified the new Py_REF_DEBUG (etc) lexical helper macro definitions so
Tim Peters <tim.peters@gmail.com>
parents: 24155
diff changeset
721 #endif /* COUNT_ALLOCS */
1347
a22a350d3a5d * Extended X interface: pixmap objects, colormap objects visual objects,
Sjoerd Mullender <sjoerd@acm.org>
parents: 1329
diff changeset
722
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
723 #ifdef Py_TRACE_REFS
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
724 /* Py_TRACE_REFS is such major surgery that we call external routines. */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
725 PyAPI_FUNC(void) _Py_NewReference(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
726 PyAPI_FUNC(void) _Py_ForgetReference(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
727 PyAPI_FUNC(void) _Py_Dealloc(PyObject *);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
728 PyAPI_FUNC(void) _Py_PrintReferences(FILE *);
28653
56006d97bcef _Py_PrintReferences(): Changed to print object address at start of each
Tim Peters <tim.peters@gmail.com>
parents: 28396
diff changeset
729 PyAPI_FUNC(void) _Py_PrintReferenceAddresses(FILE *);
28396
d56282c28a1e Improved new Py_TRACE_REFS gimmicks.
Tim Peters <tim.peters@gmail.com>
parents: 28389
diff changeset
730 PyAPI_FUNC(void) _Py_AddToAllObjects(PyObject *, int force);
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
731
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
732 #else
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
733 /* Without Py_TRACE_REFS, there's little enough to do that we expand code
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
734 * inline.
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
735 */
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
736 #define _Py_NewReference(op) ( \
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
737 _Py_INC_TPALLOCS(op) _Py_COUNT_ALLOCS_COMMA \
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
738 _Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
739 Py_REFCNT(op) = 1)
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
740
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
741 #define _Py_ForgetReference(op) _Py_INC_TPFREES(op)
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
742
24171
5e4b8d1e9fd6 Uglified the new Py_REF_DEBUG (etc) lexical helper macro definitions so
Tim Peters <tim.peters@gmail.com>
parents: 24155
diff changeset
743 #define _Py_Dealloc(op) ( \
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
744 _Py_INC_TPFREES(op) _Py_COUNT_ALLOCS_COMMA \
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 42333
diff changeset
745 (*Py_TYPE(op)->tp_dealloc)((PyObject *)(op)))
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
746 #endif /* !Py_TRACE_REFS */
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
747
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
748 #define Py_INCREF(op) ( \
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
749 _Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
42333
6620a510e9a9 PEP 3123: Provide forward compatibility with Python 3.0, while keeping
Martin v. Löwis <martin@v.loewis.de>
parents: 40908
diff changeset
750 ((PyObject*)(op))->ob_refcnt++)
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
751
24184
c4dcb80f48ea object.h special-build macro minefield: renamed all the new lexical
Tim Peters <tim.peters@gmail.com>
parents: 24171
diff changeset
752 #define Py_DECREF(op) \
52872
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
753 do { \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
754 if (_Py_DEC_REFTOTAL _Py_REF_DEBUG_COMMA \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
755 --((PyObject*)(op))->ob_refcnt != 0) \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
756 _Py_CHECK_REFCNT(op) \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
757 else \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
758 _Py_Dealloc((PyObject *)(op)); \
bffa77696926 - Py_DECREF: Add `do { ... } while (0)' to avoid compiler warnings.
Matthias Klose <doko@ubuntu.com>
parents: 52825
diff changeset
759 } while (0)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
760
37726
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
761 /* Safely decref `op` and set `op` to NULL, especially useful in tp_clear
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
762 * and tp_dealloc implementatons.
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
763 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
764 * Note that "the obvious" code can be deadly:
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
765 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
766 * Py_XDECREF(op);
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
767 * op = NULL;
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
768 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
769 * Typically, `op` is something like self->containee, and `self` is done
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
770 * using its `containee` member. In the code sequence above, suppose
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
771 * `containee` is non-NULL with a refcount of 1. Its refcount falls to
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
772 * 0 on the first line, which can trigger an arbitrary amount of code,
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
773 * possibly including finalizers (like __del__ methods or weakref callbacks)
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
774 * coded in Python, which in turn can release the GIL and allow other threads
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
775 * to run, etc. Such code may even invoke methods of `self` again, or cause
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
776 * cyclic gc to trigger, but-- oops! --self->containee still points to the
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
777 * object being torn down, and it may be in an insane state while being torn
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
778 * down. This has in fact been a rich historic source of miserable (rare &
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
779 * hard-to-diagnose) segfaulting (and other) bugs.
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
780 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
781 * The safe way is:
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
782 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
783 * Py_CLEAR(op);
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
784 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
785 * That arranges to set `op` to NULL _before_ decref'ing, so that any code
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
786 * triggered as a side-effect of `op` getting torn down no longer believes
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
787 * `op` points to a valid object.
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
788 *
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
789 * There are cases where it's safe to use the naive code, but they're brittle.
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
790 * For example, if `op` points to a Python integer, you know that destroying
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
791 * one of those can't cause problems -- but in part that relies on that
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
792 * Python integers aren't currently weakly referencable. Best practice is
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
793 * to use Py_CLEAR() even if you can't think of a reason for why you need to.
27a639c4471a There were no comments explaining what Py_CLEAR() did or
Tim Peters <tim.peters@gmail.com>
parents: 37638
diff changeset
794 */
32670
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
795 #define Py_CLEAR(op) \
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
796 do { \
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
797 if (op) { \
47948
5ac26b1f25d9 Issue #3274: Use a less common identifier for the temporary variable
Alexandre Vassalotti <alexandre@peadrop.com>
parents: 47822
diff changeset
798 PyObject *_py_tmp = (PyObject *)(op); \
32670
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
799 (op) = NULL; \
47948
5ac26b1f25d9 Issue #3274: Use a less common identifier for the temporary variable
Alexandre Vassalotti <alexandre@peadrop.com>
parents: 47822
diff changeset
800 Py_DECREF(_py_tmp); \
32670
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
801 } \
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
802 } while (0)
a1a9776fab53 Implemented a new Py_CLEAR macro. This macro should be used when
Jim Fulton <jim@zope.com>
parents: 31940
diff changeset
803
86
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
804 /* Macros to use in case the object pointer may be NULL: */
52899
b0429c7fa71a Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
Matthias Klose <doko@ubuntu.com>
parents: 52872
diff changeset
805 #define Py_XINCREF(op) do { if ((op) == NULL) ; else Py_INCREF(op); } while (0)
b0429c7fa71a Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
Matthias Klose <doko@ubuntu.com>
parents: 52872
diff changeset
806 #define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
807
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
808 /*
31940
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
809 These are provided as conveniences to Python runtime embedders, so that
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
810 they can have object code that is not dependent on Python compilation flags.
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
811 */
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
812 PyAPI_FUNC(void) Py_IncRef(PyObject *);
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
813 PyAPI_FUNC(void) Py_DecRef(PyObject *);
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
814
059740d52ae5 Two new public API functions, Py_IncRef and Py_DecRef. Useful for
Thomas Heller <theller@ctypes.org>
parents: 30887
diff changeset
815 /*
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
816 _Py_NoneStruct is an object of undefined type which can be used in contexts
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
817 where NULL (nil) is not suitable (since NULL often means 'error').
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
818
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
819 Don't forget to apply Py_INCREF() when returning this value!!!
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
820 */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
821 PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
822 #define Py_None (&_Py_NoneStruct)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
823
30719
7dfdf9e8d95d Defined macros Py_RETURN_(TRUE|FALSE|NONE) as helper functions for returning
Brett Cannon <bcannon@gmail.com>
parents: 29245
diff changeset
824 /* Macro for returning Py_None from a function */
32793
1e2187f50631 SF bug 994255: Py_RETURN_NONE causes too much warnings
Tim Peters <tim.peters@gmail.com>
parents: 32670
diff changeset
825 #define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
30719
7dfdf9e8d95d Defined macros Py_RETURN_(TRUE|FALSE|NONE) as helper functions for returning
Brett Cannon <bcannon@gmail.com>
parents: 29245
diff changeset
826
15716
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
827 /*
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
828 Py_NotImplemented is a singleton used to signal that an operation is
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
829 not implemented for a given type combination.
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
830 */
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
831 PyAPI_DATA(PyObject) _Py_NotImplementedStruct; /* Don't use this directly */
15716
362e53f43dd2 - Add nb_cmp slot for new style nubmers.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 14497
diff changeset
832 #define Py_NotImplemented (&_Py_NotImplementedStruct)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
833
15938
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
834 /* Rich comparison opcodes */
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
835 #define Py_LT 0
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
836 #define Py_LE 1
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
837 #define Py_EQ 2
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
838 #define Py_NE 3
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
839 #define Py_GT 4
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
840 #define Py_GE 5
8fd221aed357 Introduction to rich comparisons:
Guido van Rossum <guido@python.org>
parents: 15716
diff changeset
841
33541
781aef974463 A static swapped_op[] array was defined in 3 different C files, & I think
Tim Peters <tim.peters@gmail.com>
parents: 33386
diff changeset
842 /* Maps Py_LT to Py_GT, ..., Py_GE to Py_LE.
781aef974463 A static swapped_op[] array was defined in 3 different C files, & I think
Tim Peters <tim.peters@gmail.com>
parents: 33386
diff changeset
843 * Defined in object.c.
781aef974463 A static swapped_op[] array was defined in 3 different C files, & I think
Tim Peters <tim.peters@gmail.com>
parents: 33386
diff changeset
844 */
781aef974463 A static swapped_op[] array was defined in 3 different C files, & I think
Tim Peters <tim.peters@gmail.com>
parents: 33386
diff changeset
845 PyAPI_DATA(int) _Py_SwappedOp[];
781aef974463 A static swapped_op[] array was defined in 3 different C files, & I think
Tim Peters <tim.peters@gmail.com>
parents: 33386
diff changeset
846
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
847 /*
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
848 Define staticforward and statichere for source compatibility with old
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
849 C extensions.
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
850
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
851 The staticforward define was needed to support certain broken C
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
852 compilers (notably SCO ODT 3.0, perhaps early AIX as well) botched the
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
853 static keyword when it was used with a forward declaration of a static
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
854 initialized structure. Standard C allows the forward declaration with
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
855 static, and we've decided to stop catering to broken C compilers.
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 24184
diff changeset
856 (In fact, we expect that the compilers are all fixed eight years later.)
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
857 */
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
858
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
859 #define staticforward static
2422
f4f71ebea53f change in staticforward -- added statichere
Guido van Rossum <guido@python.org>
parents: 2364
diff changeset
860 #define statichere static
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
861
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
862
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1400
diff changeset
863 /*
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
864 More conventions
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
865 ================
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
866
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
867 Argument Checking
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
868 -----------------
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
869
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
870 Functions that take objects as arguments normally don't check for nil
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
871 arguments, but they do check the type of the argument, and return an
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
872 error if the function doesn't apply to the type.
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
873
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
874 Failure Modes
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
875 -------------
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
876
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
877 Functions may fail for a variety of reasons, including running out of
86
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
878 memory. This is communicated to the caller in two ways: an error string
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
879 is set (see errors.h), and the function result differs: functions that
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
880 normally return a pointer return NULL for failure, functions returning
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
881 an integer return -1 (which could be a legal return value too!), and
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents: 68
diff changeset
882 other functions return 0 for success and -1 for failure.
24126
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
883 Callers should always check for errors before using the result. If
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
884 an error was set, the caller must either explicitly clear it, or pass
fdf80e04e4bb Rearranged and added comments to object.h, to clarify many things
Tim Peters <tim.peters@gmail.com>
parents: 24122
diff changeset
885 the error on to its caller.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
886
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
887 Reference Counts
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
888 ----------------
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
889
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
890 It takes a while to get used to the proper usage of reference counts.
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
891
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
892 Functions that create an object set the reference count to 1; such new
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
893 objects must be stored somewhere or destroyed again with Py_DECREF().
30887
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
894 Some functions that 'store' objects, such as PyTuple_SetItem() and
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
895 PyList_SetItem(),
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
896 don't increment the reference count of the object, since the most
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
897 frequent use is to store a fresh object. Functions that 'retrieve'
30887
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
898 objects, such as PyTuple_GetItem() and PyDict_GetItemString(), also
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
899 don't increment
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
900 the reference count, since most frequently the object is only looked at
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
901 quickly. Thus, to retrieve an object and store it again, the caller
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
902 must call Py_INCREF() explicitly.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
903
30887
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
904 NOTE: functions that 'consume' a reference count, like
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
905 PyList_SetItem(), consume the reference even if the object wasn't
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
906 successfully stored, to simplify error handling.
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
907
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
908 It seems attractive to make other functions that take an object as
30887
3ae82928b113 fixed buggy comment as per SF bug #827856
Alex Martelli <aleaxit@gmail.com>
parents: 30721
diff changeset
909 argument consume a reference count; however, this may quickly get
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
910 confusing (even the current practice is already confusing). Consider
2129
05360cd616ae The great renaming, phase two: all header files have been updated to
Guido van Rossum <guido@python.org>
parents: 2071
diff changeset
911 it carefully, it may save lots of calls to Py_INCREF() and Py_DECREF() at
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
912 times.
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
913 */
1329
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1324
diff changeset
914
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
915
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
916 /* Trashcan mechanism, thanks to Christian Tismer.
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
917
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
918 When deallocating a container object, it's possible to trigger an unbounded
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
919 chain of deallocations, as each Py_DECREF in turn drops the refcount on "the
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
920 next" object in the chain to 0. This can easily lead to stack faults, and
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
921 especially in threads (which typically have less stack space to work with).
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
922
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
923 A container object that participates in cyclic gc can avoid this by
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
924 bracketing the body of its tp_dealloc function with a pair of macros:
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
925
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
926 static void
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
927 mytype_dealloc(mytype *p)
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
928 {
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
929 ... declarations go here ...
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
930
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
931 PyObject_GC_UnTrack(p); // must untrack first
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
932 Py_TRASHCAN_SAFE_BEGIN(p)
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
933 ... The body of the deallocator goes here, including all calls ...
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
934 ... to Py_DECREF on contained objects. ...
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
935 Py_TRASHCAN_SAFE_END(p)
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
936 }
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
937
24654
f672e1dbad92 Added info about the right way to leave the body of a trashcan-protected
Tim Peters <tim.peters@gmail.com>
parents: 24420
diff changeset
938 CAUTION: Never return from the middle of the body! If the body needs to
f672e1dbad92 Added info about the right way to leave the body of a trashcan-protected
Tim Peters <tim.peters@gmail.com>
parents: 24420
diff changeset
939 "get out early", put a label immediately before the Py_TRASHCAN_SAFE_END
f672e1dbad92 Added info about the right way to leave the body of a trashcan-protected
Tim Peters <tim.peters@gmail.com>
parents: 24420
diff changeset
940 call, and goto it. Else the call-depth counter (see below) will stay
f672e1dbad92 Added info about the right way to leave the body of a trashcan-protected
Tim Peters <tim.peters@gmail.com>
parents: 24420
diff changeset
941 above 0 forever, and the trashcan will never get emptied.
f672e1dbad92 Added info about the right way to leave the body of a trashcan-protected
Tim Peters <tim.peters@gmail.com>
parents: 24420
diff changeset
942
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
943 How it works: The BEGIN macro increments a call-depth counter. So long
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
944 as this counter is small, the body of the deallocator is run directly without
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
945 further ado. But if the counter gets large, it instead adds p to a list of
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
946 objects to be deallocated later, skips the body of the deallocator, and
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
947 resumes execution after the END macro. The tp_dealloc routine then returns
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
948 without deallocating anything (and so unbounded call-stack depth is avoided).
12481
a8898a172fe2 Christian Tismer -- total rewrite on trashcan code.
Guido van Rossum <guido@python.org>
parents: 12406
diff changeset
949
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
950 When the call stack finishes unwinding again, code generated by the END macro
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
951 notices this, and calls another routine to deallocate all the objects that
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
952 may have been added to the list of deferred deallocations. In effect, a
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
953 chain of N deallocations is broken into N / PyTrash_UNWIND_LEVEL pieces,
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
954 with the call stack never exceeding a depth of PyTrash_UNWIND_LEVEL.
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
955 */
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
956
24420
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
957 PyAPI_FUNC(void) _PyTrash_deposit_object(PyObject*);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
958 PyAPI_FUNC(void) _PyTrash_destroy_chain(void);
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
959 PyAPI_DATA(int) _PyTrash_delete_nesting;
36e2fd3f08f7 Excise DL_IMPORT/EXPORT from object.h, and related files. This patch
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
960 PyAPI_DATA(PyObject *) _PyTrash_delete_later;
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
961
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
962 #define PyTrash_UNWIND_LEVEL 50
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
963
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
964 #define Py_TRASHCAN_SAFE_BEGIN(op) \
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
965 if (_PyTrash_delete_nesting < PyTrash_UNWIND_LEVEL) { \
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
966 ++_PyTrash_delete_nesting;
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
967 /* The body of the deallocator is here. */
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
968 #define Py_TRASHCAN_SAFE_END(op) \
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
969 --_PyTrash_delete_nesting; \
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
970 if (_PyTrash_delete_later && _PyTrash_delete_nesting <= 0) \
12481
a8898a172fe2 Christian Tismer -- total rewrite on trashcan code.
Guido van Rossum <guido@python.org>
parents: 12406
diff changeset
971 _PyTrash_destroy_chain(); \
11999
c94247b5c355 Christian Tismer's "trashcan" patch:
Guido van Rossum <guido@python.org>
parents: 11891
diff changeset
972 } \
24122
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
973 else \
d332484e394a Trashcan cleanup: Now that cyclic gc is always there, the trashcan
Tim Peters <tim.peters@gmail.com>
parents: 24121
diff changeset
974 _PyTrash_deposit_object((PyObject*)op);
12481
a8898a172fe2 Christian Tismer -- total rewrite on trashcan code.
Guido van Rossum <guido@python.org>
parents: 12406
diff changeset
975
1329
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1324
diff changeset
976 #ifdef __cplusplus
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1324
diff changeset
977 }
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1324
diff changeset
978 #endif
519c25039c6a * Added support for X11 modules.
Guido van Rossum <guido@python.org>
parents: 1324
diff changeset
979 #endif /* !Py_OBJECT_H */