annotate test/include/python2.7/object.h @ 3:7d1a9a91b989 draft

planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
author yating-l
date Thu, 18 May 2017 18:37:28 -0400
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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
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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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138 typedef int (*coercion)(PyObject **, PyObject **);
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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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143 typedef int(*intobjargproc)(PyObject *, int, PyObject *);
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144 typedef int(*intintobjargproc)(PyObject *, int, int, PyObject *);
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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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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 */
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152 typedef int (*getreadbufferproc)(PyObject *, int, void **);
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153 typedef int (*getwritebufferproc)(PyObject *, int, void **);
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154 typedef int (*getsegcountproc)(PyObject *, int *);
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155 typedef int (*getcharbufferproc)(PyObject *, int, char **);
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156 /* ssize_t-based buffer interface */
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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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159 typedef Py_ssize_t (*segcountproc)(PyObject *, Py_ssize_t *);
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160 typedef Py_ssize_t (*charbufferproc)(PyObject *, Py_ssize_t, char **);
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161
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162
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163 /* Py3k buffer interface */
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164 typedef struct bufferinfo {
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165 void *buf;
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166 PyObject *obj; /* owned reference */
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167 Py_ssize_t len;
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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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172 char *format;
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173 Py_ssize_t *shape;
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174 Py_ssize_t *strides;
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175 Py_ssize_t *suboffsets;
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176 Py_ssize_t smalltable[2]; /* static store for shape and strides of
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177 mono-dimensional buffers. */
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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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182 typedef void (*releasebufferproc)(PyObject *, Py_buffer *);
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183
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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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200 #define PyBUF_STRIDED (PyBUF_STRIDES | PyBUF_WRITABLE)
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201 #define PyBUF_STRIDED_RO (PyBUF_STRIDES)
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202
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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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216 typedef int (*visitproc)(PyObject *, void *);
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217 typedef int (*traverseproc)(PyObject *, visitproc, void *);
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218
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219 typedef struct {
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220 /* For numbers without flag bit Py_TPFLAGS_CHECKTYPES set, all
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221 arguments are guaranteed to be of the object's type (modulo
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222 coercion hacks -- i.e. if the type's coercion function
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223 returns other types, then these are allowed as well). Numbers that
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224 have the Py_TPFLAGS_CHECKTYPES flag bit set should check *both*
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225 arguments for proper type and implement the necessary conversions
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226 in the slot functions themselves. */
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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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231 binaryfunc nb_divide;
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232 binaryfunc nb_remainder;
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233 binaryfunc nb_divmod;
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234 ternaryfunc nb_power;
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235 unaryfunc nb_negative;
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236 unaryfunc nb_positive;
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237 unaryfunc nb_absolute;
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238 inquiry nb_nonzero;
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239 unaryfunc nb_invert;
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240 binaryfunc nb_lshift;
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241 binaryfunc nb_rshift;
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242 binaryfunc nb_and;
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243 binaryfunc nb_xor;
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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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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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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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259 binaryfunc nb_inplace_rshift;
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260 binaryfunc nb_inplace_and;
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261 binaryfunc nb_inplace_xor;
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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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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;
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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 *);
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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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309 typedef PyObject *(*getattrofunc)(PyObject *, PyObject *);
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310 typedef int (*setattrfunc)(PyObject *, char *, PyObject *);
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311 typedef int (*setattrofunc)(PyObject *, PyObject *, PyObject *);
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312 typedef int (*cmpfunc)(PyObject *, PyObject *);
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313 typedef PyObject *(*reprfunc)(PyObject *);
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314 typedef long (*hashfunc)(PyObject *);
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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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330
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331 destructor tp_dealloc;
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332 printfunc tp_print;
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333 getattrfunc tp_getattr;
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334 setattrfunc tp_setattr;
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335 cmpfunc tp_compare;
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336 reprfunc tp_repr;
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337
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338 /* Method suites for standard classes */
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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;
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343
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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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348 reprfunc tp_str;
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349 getattrofunc tp_getattro;
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350 setattrofunc tp_setattro;
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351
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352 /* Functions to access object as input/output buffer */
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353 PyBufferProcs *tp_as_buffer;
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354
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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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359
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360 /* Assigned meaning in release 2.0 */
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361 /* call function for all accessible objects */
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362 traverseproc tp_traverse;
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363
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364 /* delete references to contained objects */
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365 inquiry tp_clear;
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366
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367 /* Assigned meaning in release 2.1 */
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368 /* rich comparisons */
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369 richcmpfunc tp_richcompare;
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370
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371 /* weak reference enabler */
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372 Py_ssize_t tp_weaklistoffset;
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373
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374 /* Added in release 2.2 */
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375 /* Iterators */
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376 getiterfunc tp_iter;
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377 iternextfunc tp_iternext;
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378
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379 /* Attribute descriptor and subclassing stuff */
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380 struct PyMethodDef *tp_methods;
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381 struct PyMemberDef *tp_members;
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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;
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387 Py_ssize_t tp_dictoffset;
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388 initproc tp_init;
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389 allocfunc tp_alloc;
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390 newfunc tp_new;
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391 freefunc tp_free; /* Low-level free-memory routine */
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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 */
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395 PyObject *tp_cache;
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396 PyObject *tp_subclasses;
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397 PyObject *tp_weaklist;
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398 destructor tp_del;
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399
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400 /* Type attribute cache version tag. Added in version 2.6 */
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401 unsigned int tp_version_tag;
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402
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403 #ifdef COUNT_ALLOCS
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404 /* these must be last and never explicitly initialized */
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405 Py_ssize_t tp_allocs;
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406 Py_ssize_t tp_frees;
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407 Py_ssize_t tp_maxalloc;
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408 struct _typeobject *tp_prev;
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409 struct _typeobject *tp_next;
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410 #endif
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411 } PyTypeObject;
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412
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413
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414 /* The *real* layout of a type object when allocated on the heap */
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415 typedef struct _heaptypeobject {
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416 /* Note: there's a dependency on the order of these members
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417 in slotptr() in typeobject.c . */
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418 PyTypeObject ht_type;
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419 PyNumberMethods as_number;
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420 PyMappingMethods as_mapping;
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421 PySequenceMethods as_sequence; /* as_sequence comes after as_mapping,
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422 so that the mapping wins when both
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423 the mapping and the sequence define
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424 a given operator (e.g. __getitem__).
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425 see add_operators() in typeobject.c . */
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426 PyBufferProcs as_buffer;
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427 PyObject *ht_name, *ht_slots;
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428 /* here are optional user slots, followed by the members. */
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429 } PyHeapTypeObject;
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430
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431 /* access macro to the members which are floating "behind" the object */
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432 #define PyHeapType_GET_MEMBERS(etype) \
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433 ((PyMemberDef *)(((char *)etype) + Py_TYPE(etype)->tp_basicsize))
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434
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435
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436 /* Generic type check */
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437 PyAPI_FUNC(int) PyType_IsSubtype(PyTypeObject *, PyTypeObject *);
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438 #define PyObject_TypeCheck(ob, tp) \
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439 (Py_TYPE(ob) == (tp) || PyType_IsSubtype(Py_TYPE(ob), (tp)))
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440
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441 PyAPI_DATA(PyTypeObject) PyType_Type; /* built-in 'type' */
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442 PyAPI_DATA(PyTypeObject) PyBaseObject_Type; /* built-in 'object' */
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443 PyAPI_DATA(PyTypeObject) PySuper_Type; /* built-in 'super' */
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444
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445 #define PyType_Check(op) \
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446 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TYPE_SUBCLASS)
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447 #define PyType_CheckExact(op) (Py_TYPE(op) == &PyType_Type)
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448
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449 PyAPI_FUNC(int) PyType_Ready(PyTypeObject *);
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450 PyAPI_FUNC(PyObject *) PyType_GenericAlloc(PyTypeObject *, Py_ssize_t);
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451 PyAPI_FUNC(PyObject *) PyType_GenericNew(PyTypeObject *,
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452 PyObject *, PyObject *);
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453 PyAPI_FUNC(PyObject *) _PyType_Lookup(PyTypeObject *, PyObject *);
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454 PyAPI_FUNC(PyObject *) _PyObject_LookupSpecial(PyObject *, char *, PyObject **);
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455 PyAPI_FUNC(unsigned int) PyType_ClearCache(void);
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456 PyAPI_FUNC(void) PyType_Modified(PyTypeObject *);
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457
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458 /* Generic operations on objects */
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459 PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
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460 PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
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461 PyAPI_FUNC(PyObject *) PyObject_Repr(PyObject *);
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462 PyAPI_FUNC(PyObject *) _PyObject_Str(PyObject *);
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463 PyAPI_FUNC(PyObject *) PyObject_Str(PyObject *);
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464 #define PyObject_Bytes PyObject_Str
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465 #ifdef Py_USING_UNICODE
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466 PyAPI_FUNC(PyObject *) PyObject_Unicode(PyObject *);
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467 #endif
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468 PyAPI_FUNC(int) PyObject_Compare(PyObject *, PyObject *);
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469 PyAPI_FUNC(PyObject *) PyObject_RichCompare(PyObject *, PyObject *, int);
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470 PyAPI_FUNC(int) PyObject_RichCompareBool(PyObject *, PyObject *, int);
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471 PyAPI_FUNC(PyObject *) PyObject_GetAttrString(PyObject *, const char *);
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472 PyAPI_FUNC(int) PyObject_SetAttrString(PyObject *, const char *, PyObject *);
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473 PyAPI_FUNC(int) PyObject_HasAttrString(PyObject *, const char *);
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474 PyAPI_FUNC(PyObject *) PyObject_GetAttr(PyObject *, PyObject *);
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475 PyAPI_FUNC(int) PyObject_SetAttr(PyObject *, PyObject *, PyObject *);
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476 PyAPI_FUNC(int) PyObject_HasAttr(PyObject *, PyObject *);
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477 PyAPI_FUNC(PyObject **) _PyObject_GetDictPtr(PyObject *);
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478 PyAPI_FUNC(PyObject *) PyObject_SelfIter(PyObject *);
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479 PyAPI_FUNC(PyObject *) _PyObject_NextNotImplemented(PyObject *);
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480 PyAPI_FUNC(PyObject *) PyObject_GenericGetAttr(PyObject *, PyObject *);
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481 PyAPI_FUNC(int) PyObject_GenericSetAttr(PyObject *,
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482 PyObject *, PyObject *);
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483 PyAPI_FUNC(long) PyObject_Hash(PyObject *);
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484 PyAPI_FUNC(long) PyObject_HashNotImplemented(PyObject *);
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485 PyAPI_FUNC(int) PyObject_IsTrue(PyObject *);
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486 PyAPI_FUNC(int) PyObject_Not(PyObject *);
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487 PyAPI_FUNC(int) PyCallable_Check(PyObject *);
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488 PyAPI_FUNC(int) PyNumber_Coerce(PyObject **, PyObject **);
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489 PyAPI_FUNC(int) PyNumber_CoerceEx(PyObject **, PyObject **);
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490
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491 PyAPI_FUNC(void) PyObject_ClearWeakRefs(PyObject *);
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492
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493 /* A slot function whose address we need to compare */
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494 extern int _PyObject_SlotCompare(PyObject *, PyObject *);
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495 /* Same as PyObject_Generic{Get,Set}Attr, but passing the attributes
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496 dict as the last parameter. */
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497 PyAPI_FUNC(PyObject *)
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498 _PyObject_GenericGetAttrWithDict(PyObject *, PyObject *, PyObject *);
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499 PyAPI_FUNC(int)
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500 _PyObject_GenericSetAttrWithDict(PyObject *, PyObject *,
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501 PyObject *, PyObject *);
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502
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503
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504 /* PyObject_Dir(obj) acts like Python __builtin__.dir(obj), returning a
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505 list of strings. PyObject_Dir(NULL) is like __builtin__.dir(),
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506 returning the names of the current locals. In this case, if there are
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507 no current locals, NULL is returned, and PyErr_Occurred() is false.
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508 */
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509 PyAPI_FUNC(PyObject *) PyObject_Dir(PyObject *);
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510
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511
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512 /* Helpers for printing recursive container types */
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513 PyAPI_FUNC(int) Py_ReprEnter(PyObject *);
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514 PyAPI_FUNC(void) Py_ReprLeave(PyObject *);
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515
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516 /* Helpers for hash functions */
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517 PyAPI_FUNC(long) _Py_HashDouble(double);
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518 PyAPI_FUNC(long) _Py_HashPointer(void*);
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519
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520 typedef struct {
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521 long prefix;
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522 long suffix;
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523 } _Py_HashSecret_t;
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524 PyAPI_DATA(_Py_HashSecret_t) _Py_HashSecret;
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525
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526 #ifdef Py_DEBUG
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527 PyAPI_DATA(int) _Py_HashSecret_Initialized;
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528 #endif
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529
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530 /* Helper for passing objects to printf and the like.
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531 Leaks refcounts. Don't use it!
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532 */
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533 #define PyObject_REPR(obj) PyString_AS_STRING(PyObject_Repr(obj))
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534
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535 /* Flag bits for printing: */
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536 #define Py_PRINT_RAW 1 /* No string quotes etc. */
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537
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538 /*
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539 `Type flags (tp_flags)
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540
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541 These flags are used to extend the type structure in a backwards-compatible
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542 fashion. Extensions can use the flags to indicate (and test) when a given
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543 type structure contains a new feature. The Python core will use these when
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544 introducing new functionality between major revisions (to avoid mid-version
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545 changes in the PYTHON_API_VERSION).
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546
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diff changeset
547 Arbitration of the flag bit positions will need to be coordinated among
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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548 all extension writers who publically release their extensions (this will
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549 be fewer than you might expect!)..
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550
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diff changeset
551 Python 1.5.2 introduced the bf_getcharbuffer slot into PyBufferProcs.
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diff changeset
552
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diff changeset
553 Type definitions should use Py_TPFLAGS_DEFAULT for their tp_flags value.
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554
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diff changeset
555 Code can use PyType_HasFeature(type_ob, flag_value) to test whether the
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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556 given type object has a specified feature.
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diff changeset
557
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558 NOTE: when building the core, Py_TPFLAGS_DEFAULT includes
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
559 Py_TPFLAGS_HAVE_VERSION_TAG; outside the core, it doesn't. This is so
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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560 that extensions that modify tp_dict of their own types directly don't
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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561 break, since this was allowed in 2.5. In 3.0 they will have to
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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562 manually remove this flag though!
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563 */
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diff changeset
564
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diff changeset
565 /* PyBufferProcs contains bf_getcharbuffer */
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diff changeset
566 #define Py_TPFLAGS_HAVE_GETCHARBUFFER (1L<<0)
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diff changeset
567
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diff changeset
568 /* PySequenceMethods contains sq_contains */
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diff changeset
569 #define Py_TPFLAGS_HAVE_SEQUENCE_IN (1L<<1)
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diff changeset
570
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diff changeset
571 /* This is here for backwards compatibility. Extensions that use the old GC
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
572 * API will still compile but the objects will not be tracked by the GC. */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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573 #define Py_TPFLAGS_GC 0 /* used to be (1L<<2) */
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diff changeset
574
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diff changeset
575 /* PySequenceMethods and PyNumberMethods contain in-place operators */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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576 #define Py_TPFLAGS_HAVE_INPLACEOPS (1L<<3)
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diff changeset
577
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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578 /* PyNumberMethods do their own coercion */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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579 #define Py_TPFLAGS_CHECKTYPES (1L<<4)
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580
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
581 /* tp_richcompare is defined */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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582 #define Py_TPFLAGS_HAVE_RICHCOMPARE (1L<<5)
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diff changeset
583
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diff changeset
584 /* Objects which are weakly referencable if their tp_weaklistoffset is >0 */
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diff changeset
585 #define Py_TPFLAGS_HAVE_WEAKREFS (1L<<6)
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diff changeset
586
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diff changeset
587 /* tp_iter is defined */
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588 #define Py_TPFLAGS_HAVE_ITER (1L<<7)
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diff changeset
589
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diff changeset
590 /* New members introduced by Python 2.2 exist */
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591 #define Py_TPFLAGS_HAVE_CLASS (1L<<8)
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diff changeset
592
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diff changeset
593 /* Set if the type object is dynamically allocated */
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594 #define Py_TPFLAGS_HEAPTYPE (1L<<9)
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diff changeset
595
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diff changeset
596 /* Set if the type allows subclassing */
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597 #define Py_TPFLAGS_BASETYPE (1L<<10)
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598
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diff changeset
599 /* Set if the type is 'ready' -- fully initialized */
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diff changeset
600 #define Py_TPFLAGS_READY (1L<<12)
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601
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diff changeset
602 /* Set while the type is being 'readied', to prevent recursive ready calls */
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diff changeset
603 #define Py_TPFLAGS_READYING (1L<<13)
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diff changeset
604
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605 /* Objects support garbage collection (see objimp.h) */
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606 #define Py_TPFLAGS_HAVE_GC (1L<<14)
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607
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608 /* These two bits are preserved for Stackless Python, next after this is 17 */
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609 #ifdef STACKLESS
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610 #define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION (3L<<15)
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611 #else
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612 #define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION 0
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613 #endif
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614
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615 /* Objects support nb_index in PyNumberMethods */
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616 #define Py_TPFLAGS_HAVE_INDEX (1L<<17)
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617
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618 /* Objects support type attribute cache */
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619 #define Py_TPFLAGS_HAVE_VERSION_TAG (1L<<18)
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620 #define Py_TPFLAGS_VALID_VERSION_TAG (1L<<19)
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621
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622 /* Type is abstract and cannot be instantiated */
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623 #define Py_TPFLAGS_IS_ABSTRACT (1L<<20)
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624
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625 /* Has the new buffer protocol */
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626 #define Py_TPFLAGS_HAVE_NEWBUFFER (1L<<21)
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627
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628 /* These flags are used to determine if a type is a subclass. */
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629 #define Py_TPFLAGS_INT_SUBCLASS (1L<<23)
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630 #define Py_TPFLAGS_LONG_SUBCLASS (1L<<24)
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631 #define Py_TPFLAGS_LIST_SUBCLASS (1L<<25)
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632 #define Py_TPFLAGS_TUPLE_SUBCLASS (1L<<26)
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633 #define Py_TPFLAGS_STRING_SUBCLASS (1L<<27)
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634 #define Py_TPFLAGS_UNICODE_SUBCLASS (1L<<28)
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635 #define Py_TPFLAGS_DICT_SUBCLASS (1L<<29)
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636 #define Py_TPFLAGS_BASE_EXC_SUBCLASS (1L<<30)
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637 #define Py_TPFLAGS_TYPE_SUBCLASS (1L<<31)
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638
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639 #define Py_TPFLAGS_DEFAULT_EXTERNAL ( \
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640 Py_TPFLAGS_HAVE_GETCHARBUFFER | \
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641 Py_TPFLAGS_HAVE_SEQUENCE_IN | \
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642 Py_TPFLAGS_HAVE_INPLACEOPS | \
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643 Py_TPFLAGS_HAVE_RICHCOMPARE | \
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644 Py_TPFLAGS_HAVE_WEAKREFS | \
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645 Py_TPFLAGS_HAVE_ITER | \
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646 Py_TPFLAGS_HAVE_CLASS | \
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647 Py_TPFLAGS_HAVE_STACKLESS_EXTENSION | \
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648 Py_TPFLAGS_HAVE_INDEX | \
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649 0)
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650 #define Py_TPFLAGS_DEFAULT_CORE (Py_TPFLAGS_DEFAULT_EXTERNAL | \
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651 Py_TPFLAGS_HAVE_VERSION_TAG)
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652
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653 #ifdef Py_BUILD_CORE
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654 #define Py_TPFLAGS_DEFAULT Py_TPFLAGS_DEFAULT_CORE
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655 #else
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656 #define Py_TPFLAGS_DEFAULT Py_TPFLAGS_DEFAULT_EXTERNAL
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657 #endif
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658
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659 #define PyType_HasFeature(t,f) (((t)->tp_flags & (f)) != 0)
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660 #define PyType_FastSubclass(t,f) PyType_HasFeature(t,f)
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661
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662
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663 /*
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664 The macros Py_INCREF(op) and Py_DECREF(op) are used to increment or decrement
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665 reference counts. Py_DECREF calls the object's deallocator function when
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666 the refcount falls to 0; for
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667 objects that don't contain references to other objects or heap memory
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668 this can be the standard function free(). Both macros can be used
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669 wherever a void expression is allowed. The argument must not be a
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670 NULL pointer. If it may be NULL, use Py_XINCREF/Py_XDECREF instead.
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671 The macro _Py_NewReference(op) initialize reference counts to 1, and
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672 in special builds (Py_REF_DEBUG, Py_TRACE_REFS) performs additional
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673 bookkeeping appropriate to the special build.
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674
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675 We assume that the reference count field can never overflow; this can
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676 be proven when the size of the field is the same as the pointer size, so
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677 we ignore the possibility. Provided a C int is at least 32 bits (which
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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678 is implicitly assumed in many parts of this code), that's enough for
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679 about 2**31 references to an object.
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680
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681 XXX The following became out of date in Python 2.2, but I'm not sure
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682 XXX what the full truth is now. Certainly, heap-allocated type objects
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683 XXX can and should be deallocated.
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684 Type objects should never be deallocated; the type pointer in an object
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685 is not considered to be a reference to the type object, to save
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686 complications in the deallocation function. (This is actually a
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687 decision that's up to the implementer of each new type so if you want,
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688 you can count such references to the type object.)
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689
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690 *** WARNING*** The Py_DECREF macro must have a side-effect-free argument
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691 since it may evaluate its argument multiple times. (The alternative
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692 would be to mace it a proper function or assign it to a global temporary
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693 variable first, both of which are slower; and in a multi-threaded
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694 environment the global variable trick is not safe.)
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695 */
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696
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697 /* First define a pile of simple helper macros, one set per special
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698 * build symbol. These either expand to the obvious things, or to
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699 * nothing at all when the special mode isn't in effect. The main
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700 * macros can later be defined just once then, yet expand to different
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701 * things depending on which special build options are and aren't in effect.
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702 * Trust me <wink>: while painful, this is 20x easier to understand than,
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703 * e.g, defining _Py_NewReference five different times in a maze of nested
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704 * #ifdefs (we used to do that -- it was impenetrable).
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705 */
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706 #ifdef Py_REF_DEBUG
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707 PyAPI_DATA(Py_ssize_t) _Py_RefTotal;
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708 PyAPI_FUNC(void) _Py_NegativeRefcount(const char *fname,
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709 int lineno, PyObject *op);
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710 PyAPI_FUNC(PyObject *) _PyDict_Dummy(void);
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711 PyAPI_FUNC(PyObject *) _PySet_Dummy(void);
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712 PyAPI_FUNC(Py_ssize_t) _Py_GetRefTotal(void);
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713 #define _Py_INC_REFTOTAL _Py_RefTotal++
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714 #define _Py_DEC_REFTOTAL _Py_RefTotal--
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715 #define _Py_REF_DEBUG_COMMA ,
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716 #define _Py_CHECK_REFCNT(OP) \
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717 { if (((PyObject*)OP)->ob_refcnt < 0) \
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718 _Py_NegativeRefcount(__FILE__, __LINE__, \
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719 (PyObject *)(OP)); \
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720 }
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721 #else
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722 #define _Py_INC_REFTOTAL
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723 #define _Py_DEC_REFTOTAL
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724 #define _Py_REF_DEBUG_COMMA
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725 #define _Py_CHECK_REFCNT(OP) /* a semicolon */;
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726 #endif /* Py_REF_DEBUG */
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diff changeset
727
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
728 #ifdef COUNT_ALLOCS
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
729 PyAPI_FUNC(void) inc_count(PyTypeObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
730 PyAPI_FUNC(void) dec_count(PyTypeObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
731 #define _Py_INC_TPALLOCS(OP) inc_count(Py_TYPE(OP))
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
732 #define _Py_INC_TPFREES(OP) dec_count(Py_TYPE(OP))
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
733 #define _Py_DEC_TPFREES(OP) Py_TYPE(OP)->tp_frees--
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
734 #define _Py_COUNT_ALLOCS_COMMA ,
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
735 #else
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
736 #define _Py_INC_TPALLOCS(OP)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
737 #define _Py_INC_TPFREES(OP)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
738 #define _Py_DEC_TPFREES(OP)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
739 #define _Py_COUNT_ALLOCS_COMMA
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
740 #endif /* COUNT_ALLOCS */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
741
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
742 #ifdef Py_TRACE_REFS
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
743 /* Py_TRACE_REFS is such major surgery that we call external routines. */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
744 PyAPI_FUNC(void) _Py_NewReference(PyObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
745 PyAPI_FUNC(void) _Py_ForgetReference(PyObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
746 PyAPI_FUNC(void) _Py_Dealloc(PyObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
747 PyAPI_FUNC(void) _Py_PrintReferences(FILE *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
748 PyAPI_FUNC(void) _Py_PrintReferenceAddresses(FILE *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
749 PyAPI_FUNC(void) _Py_AddToAllObjects(PyObject *, int force);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
750
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
751 #else
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
752 /* Without Py_TRACE_REFS, there's little enough to do that we expand code
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
753 * inline.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
754 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
755 #define _Py_NewReference(op) ( \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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756 _Py_INC_TPALLOCS(op) _Py_COUNT_ALLOCS_COMMA \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
757 _Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
758 Py_REFCNT(op) = 1)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
759
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
760 #define _Py_ForgetReference(op) _Py_INC_TPFREES(op)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
761
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
762 #define _Py_Dealloc(op) ( \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
763 _Py_INC_TPFREES(op) _Py_COUNT_ALLOCS_COMMA \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
764 (*Py_TYPE(op)->tp_dealloc)((PyObject *)(op)))
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
765 #endif /* !Py_TRACE_REFS */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
766
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
767 #define Py_INCREF(op) ( \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
768 _Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
769 ((PyObject*)(op))->ob_refcnt++)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
770
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
771 #define Py_DECREF(op) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
772 do { \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
773 if (_Py_DEC_REFTOTAL _Py_REF_DEBUG_COMMA \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
774 --((PyObject*)(op))->ob_refcnt != 0) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
775 _Py_CHECK_REFCNT(op) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
776 else \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
777 _Py_Dealloc((PyObject *)(op)); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
778 } while (0)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
779
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
780 /* Safely decref `op` and set `op` to NULL, especially useful in tp_clear
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
781 * and tp_dealloc implementatons.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
782 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
783 * Note that "the obvious" code can be deadly:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
784 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
785 * Py_XDECREF(op);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
786 * op = NULL;
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
787 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
788 * Typically, `op` is something like self->containee, and `self` is done
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
789 * using its `containee` member. In the code sequence above, suppose
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
790 * `containee` is non-NULL with a refcount of 1. Its refcount falls to
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
791 * 0 on the first line, which can trigger an arbitrary amount of code,
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
792 * possibly including finalizers (like __del__ methods or weakref callbacks)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
793 * coded in Python, which in turn can release the GIL and allow other threads
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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794 * to run, etc. Such code may even invoke methods of `self` again, or cause
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
795 * cyclic gc to trigger, but-- oops! --self->containee still points to the
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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796 * object being torn down, and it may be in an insane state while being torn
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
797 * down. This has in fact been a rich historic source of miserable (rare &
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
798 * hard-to-diagnose) segfaulting (and other) bugs.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
799 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
800 * The safe way is:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
801 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
802 * Py_CLEAR(op);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
803 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
804 * That arranges to set `op` to NULL _before_ decref'ing, so that any code
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
805 * triggered as a side-effect of `op` getting torn down no longer believes
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
806 * `op` points to a valid object.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
807 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
808 * There are cases where it's safe to use the naive code, but they're brittle.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
809 * For example, if `op` points to a Python integer, you know that destroying
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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810 * one of those can't cause problems -- but in part that relies on that
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
811 * Python integers aren't currently weakly referencable. Best practice is
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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812 * to use Py_CLEAR() even if you can't think of a reason for why you need to.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
813 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
814 #define Py_CLEAR(op) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
815 do { \
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parents:
diff changeset
816 if (op) { \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
817 PyObject *_py_tmp = (PyObject *)(op); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
818 (op) = NULL; \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
819 Py_DECREF(_py_tmp); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
820 } \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
821 } while (0)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
822
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
823 /* Macros to use in case the object pointer may be NULL: */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
824 #define Py_XINCREF(op) do { if ((op) == NULL) ; else Py_INCREF(op); } while (0)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
825 #define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
826
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
827 /* Safely decref `op` and set `op` to `op2`.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
828 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
829 * As in case of Py_CLEAR "the obvious" code can be deadly:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
830 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
831 * Py_DECREF(op);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
832 * op = op2;
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
833 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
834 * The safe way is:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
835 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
836 * Py_SETREF(op, op2);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
837 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
838 * That arranges to set `op` to `op2` _before_ decref'ing, so that any code
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
839 * triggered as a side-effect of `op` getting torn down no longer believes
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
840 * `op` points to a valid object.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
841 *
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
842 * Py_XSETREF is a variant of Py_SETREF that uses Py_XDECREF instead of
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
843 * Py_DECREF.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
844 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
845
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
846 #define Py_SETREF(op, op2) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
847 do { \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
848 PyObject *_py_tmp = (PyObject *)(op); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
849 (op) = (op2); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
850 Py_DECREF(_py_tmp); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
851 } while (0)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
852
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
853 #define Py_XSETREF(op, op2) \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
854 do { \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
855 PyObject *_py_tmp = (PyObject *)(op); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
856 (op) = (op2); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
857 Py_XDECREF(_py_tmp); \
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
858 } while (0)
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diff changeset
859
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
860 /*
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
861 These are provided as conveniences to Python runtime embedders, so that
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
862 they can have object code that is not dependent on Python compilation flags.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
863 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
864 PyAPI_FUNC(void) Py_IncRef(PyObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
865 PyAPI_FUNC(void) Py_DecRef(PyObject *);
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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866
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
867 /*
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
868 _Py_NoneStruct is an object of undefined type which can be used in contexts
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
869 where NULL (nil) is not suitable (since NULL often means 'error').
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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870
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
871 Don't forget to apply Py_INCREF() when returning this value!!!
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
872 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
873 PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
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874 #define Py_None (&_Py_NoneStruct)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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875
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
876 /* Macro for returning Py_None from a function */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
877 #define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
878
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
879 /*
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
880 Py_NotImplemented is a singleton used to signal that an operation is
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
881 not implemented for a given type combination.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
882 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
883 PyAPI_DATA(PyObject) _Py_NotImplementedStruct; /* Don't use this directly */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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diff changeset
884 #define Py_NotImplemented (&_Py_NotImplementedStruct)
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diff changeset
885
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
886 /* Rich comparison opcodes */
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diff changeset
887 #define Py_LT 0
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
888 #define Py_LE 1
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889 #define Py_EQ 2
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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890 #define Py_NE 3
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891 #define Py_GT 4
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892 #define Py_GE 5
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893
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894 /* Maps Py_LT to Py_GT, ..., Py_GE to Py_LE.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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895 * Defined in object.c.
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896 */
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897 PyAPI_DATA(int) _Py_SwappedOp[];
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898
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
899 /*
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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900 Define staticforward and statichere for source compatibility with old
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
901 C extensions.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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902
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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903 The staticforward define was needed to support certain broken C
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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904 compilers (notably SCO ODT 3.0, perhaps early AIX as well) botched the
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
905 static keyword when it was used with a forward declaration of a static
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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906 initialized structure. Standard C allows the forward declaration with
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
907 static, and we've decided to stop catering to broken C compilers.
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908 (In fact, we expect that the compilers are all fixed eight years later.)
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diff changeset
909 */
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diff changeset
910
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parents:
diff changeset
911 #define staticforward static
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parents:
diff changeset
912 #define statichere static
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diff changeset
913
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diff changeset
914
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parents:
diff changeset
915 /*
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
916 More conventions
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parents:
diff changeset
917 ================
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diff changeset
918
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parents:
diff changeset
919 Argument Checking
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parents:
diff changeset
920 -----------------
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
921
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parents:
diff changeset
922 Functions that take objects as arguments normally don't check for nil
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
923 arguments, but they do check the type of the argument, and return an
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
924 error if the function doesn't apply to the type.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
925
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parents:
diff changeset
926 Failure Modes
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yating-l
parents:
diff changeset
927 -------------
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
928
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parents:
diff changeset
929 Functions may fail for a variety of reasons, including running out of
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
930 memory. This is communicated to the caller in two ways: an error string
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
931 is set (see errors.h), and the function result differs: functions that
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
932 normally return a pointer return NULL for failure, functions returning
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
933 an integer return -1 (which could be a legal return value too!), and
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
934 other functions return 0 for success and -1 for failure.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
935 Callers should always check for errors before using the result. If
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
936 an error was set, the caller must either explicitly clear it, or pass
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
937 the error on to its caller.
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parents:
diff changeset
938
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parents:
diff changeset
939 Reference Counts
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yating-l
parents:
diff changeset
940 ----------------
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
941
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yating-l
parents:
diff changeset
942 It takes a while to get used to the proper usage of reference counts.
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parents:
diff changeset
943
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yating-l
parents:
diff changeset
944 Functions that create an object set the reference count to 1; such new
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
945 objects must be stored somewhere or destroyed again with Py_DECREF().
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
946 Some functions that 'store' objects, such as PyTuple_SetItem() and
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
947 PyList_SetItem(),
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
948 don't increment the reference count of the object, since the most
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
949 frequent use is to store a fresh object. Functions that 'retrieve'
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
950 objects, such as PyTuple_GetItem() and PyDict_GetItemString(), also
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
951 don't increment
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
952 the reference count, since most frequently the object is only looked at
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
953 quickly. Thus, to retrieve an object and store it again, the caller
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
954 must call Py_INCREF() explicitly.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
955
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parents:
diff changeset
956 NOTE: functions that 'consume' a reference count, like
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
957 PyList_SetItem(), consume the reference even if the object wasn't
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
958 successfully stored, to simplify error handling.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
959
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parents:
diff changeset
960 It seems attractive to make other functions that take an object as
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
961 argument consume a reference count; however, this may quickly get
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
962 confusing (even the current practice is already confusing). Consider
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
963 it carefully, it may save lots of calls to Py_INCREF() and Py_DECREF() at
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
964 times.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
965 */
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
966
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parents:
diff changeset
967
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
968 /* Trashcan mechanism, thanks to Christian Tismer.
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parents:
diff changeset
969
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
970 When deallocating a container object, it's possible to trigger an unbounded
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
971 chain of deallocations, as each Py_DECREF in turn drops the refcount on "the
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
972 next" object in the chain to 0. This can easily lead to stack faults, and
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
973 especially in threads (which typically have less stack space to work with).
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diff changeset
974
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parents:
diff changeset
975 A container object that participates in cyclic gc can avoid this by
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
976 bracketing the body of its tp_dealloc function with a pair of macros:
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diff changeset
977
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parents:
diff changeset
978 static void
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parents:
diff changeset
979 mytype_dealloc(mytype *p)
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parents:
diff changeset
980 {
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
981 ... declarations go here ...
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diff changeset
982
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
983 PyObject_GC_UnTrack(p); // must untrack first
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parents:
diff changeset
984 Py_TRASHCAN_SAFE_BEGIN(p)
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diff changeset
985 ... The body of the deallocator goes here, including all calls ...
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
986 ... to Py_DECREF on contained objects. ...
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parents:
diff changeset
987 Py_TRASHCAN_SAFE_END(p)
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parents:
diff changeset
988 }
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diff changeset
989
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diff changeset
990 CAUTION: Never return from the middle of the body! If the body needs to
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
991 "get out early", put a label immediately before the Py_TRASHCAN_SAFE_END
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
992 call, and goto it. Else the call-depth counter (see below) will stay
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
993 above 0 forever, and the trashcan will never get emptied.
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diff changeset
994
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parents:
diff changeset
995 How it works: The BEGIN macro increments a call-depth counter. So long
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diff changeset
996 as this counter is small, the body of the deallocator is run directly without
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
997 further ado. But if the counter gets large, it instead adds p to a list of
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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diff changeset
998 objects to be deallocated later, skips the body of the deallocator, and
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
diff changeset
999 resumes execution after the END macro. The tp_dealloc routine then returns
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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parents:
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1000 without deallocating anything (and so unbounded call-stack depth is avoided).
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1001
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1002 When the call stack finishes unwinding again, code generated by the END macro
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1003 notices this, and calls another routine to deallocate all the objects that
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1004 may have been added to the list of deferred deallocations. In effect, a
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1005 chain of N deallocations is broken into N / PyTrash_UNWIND_LEVEL pieces,
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1006 with the call stack never exceeding a depth of PyTrash_UNWIND_LEVEL.
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1007 */
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1008
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1009 /* This is the old private API, invoked by the macros before 2.7.4.
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1010 Kept for binary compatibility of extensions. */
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1011 PyAPI_FUNC(void) _PyTrash_deposit_object(PyObject*);
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1012 PyAPI_FUNC(void) _PyTrash_destroy_chain(void);
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1013 PyAPI_DATA(int) _PyTrash_delete_nesting;
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1014 PyAPI_DATA(PyObject *) _PyTrash_delete_later;
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1015
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1016 /* The new thread-safe private API, invoked by the macros below. */
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1017 PyAPI_FUNC(void) _PyTrash_thread_deposit_object(PyObject*);
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1018 PyAPI_FUNC(void) _PyTrash_thread_destroy_chain(void);
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1019
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1020 #define PyTrash_UNWIND_LEVEL 50
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1021
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1022 /* Note the workaround for when the thread state is NULL (issue #17703) */
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1023 #define Py_TRASHCAN_SAFE_BEGIN(op) \
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1024 do { \
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1025 PyThreadState *_tstate = PyThreadState_GET(); \
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1026 if (!_tstate || \
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1027 _tstate->trash_delete_nesting < PyTrash_UNWIND_LEVEL) { \
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1028 if (_tstate) \
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1029 ++_tstate->trash_delete_nesting;
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1030 /* The body of the deallocator is here. */
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1031 #define Py_TRASHCAN_SAFE_END(op) \
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1032 if (_tstate) { \
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1033 --_tstate->trash_delete_nesting; \
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1034 if (_tstate->trash_delete_later \
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1035 && _tstate->trash_delete_nesting <= 0) \
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1036 _PyTrash_thread_destroy_chain(); \
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1037 } \
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1038 } \
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1039 else \
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1040 _PyTrash_thread_deposit_object((PyObject*)op); \
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1041 } while (0);
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1042
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1043 #ifdef __cplusplus
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1044 }
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1045 #endif
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1046 #endif /* !Py_OBJECT_H */