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annotate contrib/python-zstandard/zstd/common/pythoncapi_compat.h @ 46374:e92ca942ddca

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cext: add Python 3.10 support * Replace "Py_TYPE(obj) = type;" with "Py_SET_TYPE(obj, type);" * Add pythoncapi_compat.h header file to get Py_SET_TYPE() on Python 2.7-3.8. Header file added to mercurial/ and contrib/python-zstandard/zstd/common/. In Python 3.10, Py_TYPE(obj) must not longer be used as an l-value. pythoncapi_compat.h comes from: https://github.com/pythoncapi/pythoncapi_compat Differential Revision: https://phab.mercurial-scm.org/D9825
author Victor Stinner <vstinner@python.org>
date Mon, 14 Dec 2020 10:44:29 +0100
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children 38b9a63d3a13
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46374
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1 // Header file providing new functions of the Python C API to old Python
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2 // versions.
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3 //
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4 // File distributed under the MIT license.
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5 //
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6 // Homepage:
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7 // https://github.com/pythoncapi/pythoncapi_compat
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8 //
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9 // Latest version:
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10 // https://raw.githubusercontent.com/pythoncapi/pythoncapi_compat/master/pythoncapi_compat.h
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11
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12 #ifndef PYTHONCAPI_COMPAT
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13 #define PYTHONCAPI_COMPAT
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14
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15 #ifdef __cplusplus
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16 extern "C" {
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17 #endif
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18
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19 #include <Python.h>
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20 #include "frameobject.h" // PyFrameObject, PyFrame_GetBack()
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21
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22
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23 // Cast argument to PyObject* type.
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24 #ifndef _PyObject_CAST
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25 # define _PyObject_CAST(op) ((PyObject*)(op))
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26 #endif
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27
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28
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29 // bpo-42262 added Py_NewRef() to Python 3.10.0a3
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30 #if PY_VERSION_HEX < 0x030a00A3 && !defined(Py_NewRef)
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31 static inline PyObject* _Py_NewRef(PyObject *obj)
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32 {
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33 Py_INCREF(obj);
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34 return obj;
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35 }
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36 #define Py_NewRef(obj) _Py_NewRef(_PyObject_CAST(obj))
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37 #endif
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38
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39
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40 // bpo-42262 added Py_XNewRef() to Python 3.10.0a3
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41 #if PY_VERSION_HEX < 0x030a00A3 && !defined(Py_XNewRef)
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42 static inline PyObject* _Py_XNewRef(PyObject *obj)
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43 {
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44 Py_XINCREF(obj);
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45 return obj;
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46 }
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47 #define Py_XNewRef(obj) _Py_XNewRef(_PyObject_CAST(obj))
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48 #endif
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49
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50
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51 // bpo-39573 added Py_SET_REFCNT() to Python 3.9.0a4
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52 #if PY_VERSION_HEX < 0x030900A4 && !defined(Py_SET_REFCNT)
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53 static inline void _Py_SET_REFCNT(PyObject *ob, Py_ssize_t refcnt)
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54 {
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55 ob->ob_refcnt = refcnt;
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56 }
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57 #define Py_SET_REFCNT(ob, refcnt) _Py_SET_REFCNT((PyObject*)(ob), refcnt)
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58 #endif
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59
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60
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61 // bpo-39573 added Py_SET_TYPE() to Python 3.9.0a4
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62 #if PY_VERSION_HEX < 0x030900A4 && !defined(Py_SET_TYPE)
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63 static inline void
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64 _Py_SET_TYPE(PyObject *ob, PyTypeObject *type)
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65 {
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66 ob->ob_type = type;
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67 }
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68 #define Py_SET_TYPE(ob, type) _Py_SET_TYPE((PyObject*)(ob), type)
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69 #endif
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70
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71
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72 // bpo-39573 added Py_SET_SIZE() to Python 3.9.0a4
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73 #if PY_VERSION_HEX < 0x030900A4 && !defined(Py_SET_SIZE)
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74 static inline void
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75 _Py_SET_SIZE(PyVarObject *ob, Py_ssize_t size)
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76 {
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77 ob->ob_size = size;
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78 }
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79 #define Py_SET_SIZE(ob, size) _Py_SET_SIZE((PyVarObject*)(ob), size)
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80 #endif
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81
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82
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83 // bpo-40421 added PyFrame_GetCode() to Python 3.9.0b1
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84 #if PY_VERSION_HEX < 0x030900B1
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85 static inline PyCodeObject*
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86 PyFrame_GetCode(PyFrameObject *frame)
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87 {
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88 PyCodeObject *code;
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89 assert(frame != NULL);
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90 code = frame->f_code;
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91 assert(code != NULL);
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92 Py_INCREF(code);
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93 return code;
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94 }
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95 #endif
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96
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97 static inline PyCodeObject*
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98 _PyFrame_GetCodeBorrow(PyFrameObject *frame)
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99 {
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100 PyCodeObject *code = PyFrame_GetCode(frame);
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101 Py_DECREF(code);
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102 return code; // borrowed reference
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103 }
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104
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105
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106 // bpo-40421 added PyFrame_GetCode() to Python 3.9.0b1
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107 #if PY_VERSION_HEX < 0x030900B1
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108 static inline PyFrameObject*
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109 PyFrame_GetBack(PyFrameObject *frame)
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110 {
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111 PyFrameObject *back;
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112 assert(frame != NULL);
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113 back = frame->f_back;
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114 Py_XINCREF(back);
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115 return back;
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116 }
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117 #endif
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118
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119 static inline PyFrameObject*
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120 _PyFrame_GetBackBorrow(PyFrameObject *frame)
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121 {
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122 PyFrameObject *back = PyFrame_GetBack(frame);
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123 Py_XDECREF(back);
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124 return back; // borrowed reference
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125 }
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126
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127
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128 // bpo-39947 added PyThreadState_GetInterpreter() to Python 3.9.0a5
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129 #if PY_VERSION_HEX < 0x030900A5
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130 static inline PyInterpreterState *
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131 PyThreadState_GetInterpreter(PyThreadState *tstate)
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132 {
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133 assert(tstate != NULL);
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134 return tstate->interp;
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135 }
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136 #endif
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137
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138
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139 // bpo-40429 added PyThreadState_GetFrame() to Python 3.9.0b1
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140 #if PY_VERSION_HEX < 0x030900B1
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141 static inline PyFrameObject*
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142 PyThreadState_GetFrame(PyThreadState *tstate)
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143 {
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144 PyFrameObject *frame;
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145 assert(tstate != NULL);
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146 frame = tstate->frame;
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147 Py_XINCREF(frame);
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148 return frame;
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149 }
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150 #endif
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151
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152 static inline PyFrameObject*
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153 _PyThreadState_GetFrameBorrow(PyThreadState *tstate)
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154 {
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155 PyFrameObject *frame = PyThreadState_GetFrame(tstate);
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156 Py_XDECREF(frame);
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157 return frame; // borrowed reference
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158 }
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159
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160
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161 // bpo-39947 added PyInterpreterState_Get() to Python 3.9.0a5
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162 #if PY_VERSION_HEX < 0x030900A5
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163 static inline PyInterpreterState *
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164 PyInterpreterState_Get(void)
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165 {
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166 PyThreadState *tstate;
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167 PyInterpreterState *interp;
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168
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169 tstate = PyThreadState_GET();
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170 if (tstate == NULL) {
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171 Py_FatalError("GIL released (tstate is NULL)");
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172 }
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173 interp = tstate->interp;
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174 if (interp == NULL) {
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175 Py_FatalError("no current interpreter");
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176 }
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177 return interp;
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178 }
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179 #endif
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180
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181
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182 // bpo-39947 added PyInterpreterState_Get() to Python 3.9.0a6
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183 #if 0x030700A1 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x030900A6
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184 static inline uint64_t
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185 PyThreadState_GetID(PyThreadState *tstate)
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186 {
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187 assert(tstate != NULL);
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188 return tstate->id;
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189 }
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190 #endif
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191
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192
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193 // bpo-37194 added PyObject_CallNoArgs() to Python 3.9.0a1
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194 #if PY_VERSION_HEX < 0x030900A1
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195 static inline PyObject*
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196 PyObject_CallNoArgs(PyObject *func)
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197 {
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198 return PyObject_CallFunctionObjArgs(func, NULL);
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199 }
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200 #endif
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201
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202
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203 // bpo-39245 made PyObject_CallOneArg() public (previously called
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204 // _PyObject_CallOneArg) in Python 3.9.0a4
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205 #if PY_VERSION_HEX < 0x030900A4
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206 static inline PyObject*
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207 PyObject_CallOneArg(PyObject *func, PyObject *arg)
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208 {
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209 return PyObject_CallFunctionObjArgs(func, arg, NULL);
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210 }
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211 #endif
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212
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213
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214 // bpo-40024 added PyModule_AddType() to Python 3.9.0a5
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215 #if PY_VERSION_HEX < 0x030900A5
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216 static inline int
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217 PyModule_AddType(PyObject *module, PyTypeObject *type)
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218 {
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219 const char *name, *dot;
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220
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221 if (PyType_Ready(type) < 0) {
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222 return -1;
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223 }
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224
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225 // inline _PyType_Name()
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226 name = type->tp_name;
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227 assert(name != NULL);
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228 dot = strrchr(name, '.');
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229 if (dot != NULL) {
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230 name = dot + 1;
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231 }
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232
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233 Py_INCREF(type);
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234 if (PyModule_AddObject(module, name, (PyObject *)type) < 0) {
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235 Py_DECREF(type);
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236 return -1;
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237 }
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238
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239 return 0;
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240 }
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241 #endif
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242
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243
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244 // bpo-40241 added PyObject_GC_IsTracked() to Python 3.9.0a6.
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245 // bpo-4688 added _PyObject_GC_IS_TRACKED() to Python 2.7.0a2.
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246 #if PY_VERSION_HEX < 0x030900A6
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247 static inline int
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248 PyObject_GC_IsTracked(PyObject* obj)
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249 {
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250 return (PyObject_IS_GC(obj) && _PyObject_GC_IS_TRACKED(obj));
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251 }
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252 #endif
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253
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254 // bpo-40241 added PyObject_GC_IsFinalized() to Python 3.9.0a6.
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255 // bpo-18112 added _PyGCHead_FINALIZED() to Python 3.4.0 final.
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256 #if PY_VERSION_HEX < 0x030900A6 && PY_VERSION_HEX >= 0x030400F0
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257 static inline int
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258 PyObject_GC_IsFinalized(PyObject *obj)
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259 {
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260 return (PyObject_IS_GC(obj) && _PyGCHead_FINALIZED((PyGC_Head *)(obj)-1));
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261 }
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262 #endif
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263
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264
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265 // bpo-39573 added Py_IS_TYPE() to Python 3.9.0a4
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266 #if PY_VERSION_HEX < 0x030900A4 && !defined(Py_IS_TYPE)
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267 static inline int
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268 _Py_IS_TYPE(const PyObject *ob, const PyTypeObject *type) {
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269 return ob->ob_type == type;
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270 }
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271 #define Py_IS_TYPE(ob, type) _Py_IS_TYPE((const PyObject*)(ob), type)
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272 #endif
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273
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274
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275 #ifdef __cplusplus
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276 }
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277 #endif
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278 #endif // PYTHONCAPI_COMPAT