Mercurial > hgrepos > Python > libs > ConfigMix

annotate configmix/_py_helper.h @ 669:02a21e689fc1 v0.21.1

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+++++ v0.21.1
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 03 Jun 2022 09:17:25 +0200
parents f454889e41fa
children
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1 /* -*- coding: utf-8 -*- */
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2 /*
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3 * Some Python helper for C.
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4 *
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5 * Also contains some interesting backports from later Python versions.
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6 *
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7 * :Copyright: (c) 2021-2022, Franz Glasner. All rights reserved.
559
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8 * :License: BSD-3-Clause. See LICENSE.txt for details.
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9 */
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10
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11 #if !defined(_PY_HELPER_H_d9df407295df4884a88e56699f6c6d8d)
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12 #define _PY_HELPER_H_d9df407295df4884a88e56699f6c6d8d
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13
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14 #if PY_VERSION_HEX < 0x030A0000
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15
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16 /*
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17 * Return a new owned reference to an object
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18 */
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19 static inline
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20 PyObject *
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21 Py_NewRef(PyObject *obj)
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22 {
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23 Py_INCREF(obj);
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24 return obj;
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25 }
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26
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27
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28 /*
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29 * Return a new owned reference to an object when the input can be NULL
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30 */
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31 static inline
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32 PyObject *
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33 Py_XNewRef(PyObject *obj)
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34 {
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35 Py_XINCREF(obj);
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36 return obj;
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37 }
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38
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39 #endif /* PY_VERSION_HEX < 0x030A0000 */
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40
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41
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42 static inline
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43 void
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44 py_clear_ref(PyObject **obj)
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45 {
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46 PyObject *tmp;
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47
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48 if ((tmp = *obj) != NULL) {
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49 *obj = NULL;
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50 Py_DECREF(tmp);
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51 }
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52 }
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53
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54
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55 /*
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56 * NOTE: This implementation is valid for CPython only!
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57 */
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58 static inline
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59 int
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60 py_object_is(PyObject *obj1, PyObject *obj2)
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61 {
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62 return (obj1 == obj2);
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63 }
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64
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65
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66 /*
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67 * NOTE: This implementation is valid for CPython only!
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68 */
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69 static inline
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70 int
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71 py_object_isnot(PyObject *obj1, PyObject *obj2)
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72 {
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73 return (obj1 != obj2);
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74 }
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75
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76
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77 /**
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78 * Copy from source to destination and make an owned reference.
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79 * Also safely clear the destination before.
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80 */
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81 static inline
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82 void
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83 py_assign(PyObject **dest, PyObject *src)
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84 {
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85 Py_DECREF(*dest);
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86 *dest = Py_NewRef(src);
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87 }
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88
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89
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90 /**
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91 * Copy from source to destination and make an owned reference.
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92 * Also clear the destination before.
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93 */
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94 static inline
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95 void
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96 py_x_assign(PyObject **dest, PyObject *src)
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97 {
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98 Py_XDECREF(*dest);
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99 *dest = Py_NewRef(src);
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100 }
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101
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102
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103 /**
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104 * Copy from source to destination and make an owned reference.
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105 * Also clear the destination before. The source object may be NULL.
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106 */
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107 static inline
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108 void
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109 py_assign_x(PyObject **dest, PyObject *src)
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110 {
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111 Py_DECREF(*dest);
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112 *dest = Py_XNewRef(src);
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113 }
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114
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115
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116 /**
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117 * Copy from source to destination and make an owned reference.
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118 * Also safely clear the destination before. The source object may be NULL.
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119 */
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120 static inline
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121 void
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122 py_x_assign_x(PyObject **dest, PyObject *src)
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123 {
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124 Py_XDECREF(*dest);
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125 *dest = Py_XNewRef(src);
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126 }
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127
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128
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129 /*
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130 * Transfer from a borrowed reference to an owned one and clear the source.
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131 * Also clear the destination before.
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132 */
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133 static inline
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134 void
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135 py_transfer_borrowed(PyObject **dest, PyObject **src)
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136 {
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137 Py_DECREF(*dest);
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138 *dest = Py_NewRef(*src);
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139 *src = NULL;
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140 }
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141
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142
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143 /*
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144 * Transfer from a borrowed reference to an owned one and clear the source.
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145 * Also safely clear the destination before.
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146 */
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147 static inline
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148 void
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149 py_x_transfer_borrowed(PyObject **dest, PyObject **src)
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150 {
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151 Py_XDECREF(*dest);
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152 *dest = Py_NewRef(*src);
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153 *src = NULL;
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154 }
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155
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156
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157 /*
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158 * Transfer from a borrowed reference to an owned one and clear the source.
562
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159 * Also clear the destination before. The source object may be NULL.
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160 */
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161 static inline
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162 void
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163 py_transfer_x_borrowed(PyObject **dest, PyObject **src)
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164 {
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165 Py_DECREF(*dest);
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166 *dest = Py_XNewRef(*src);
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167 *src = NULL;
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168 }
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169
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170
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171 /*
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172 * Transfer from a borrowed reference to an owned one and clear the source.
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173 * Also safely clear the destination before. The source object may be NULL.
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174 */
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175 static inline
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176 void
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177 py_x_transfer_x_borrowed(PyObject **dest, PyObject **src)
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178 {
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179 Py_XDECREF(*dest);
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180 *dest = Py_XNewRef(*src);
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181 *src = NULL;
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182 }
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183
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184
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185 /*
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186 * Transfer ownership from a owned reference to an owned one and clear the
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187 * source.
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188 * Also clear the destination before.
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189 */
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190 static inline
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191 void
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192 py_transfer_owned(PyObject **dest, PyObject **src)
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193 {
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194 Py_DECREF(*dest);
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195 *dest = *src;
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196 *src = NULL;
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197 }
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198
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199
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200 /*
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201 * Transfer ownership from a owned reference to an owned one and clear the
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202 * source.
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203 * Also safely clear the destination before.
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204 */
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205 static inline
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206 void
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207 py_x_transfer_owned(PyObject **dest, PyObject **src)
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208 {
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209 Py_XDECREF(*dest);
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210 *dest = *src;
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211 *src = NULL;
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212 }
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213
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214
559
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215 #endif