Mercurial > cpython-lru_cache-weakref

annotate Objects/capsule.c @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 9108e7dcd7d8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Wrap void * pointers to be passed between C modules */
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2
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3 #include "Python.h"
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4
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5 /* Internal structure of PyCapsule */
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6 typedef struct {
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7 PyObject_HEAD
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8 void *pointer;
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9 const char *name;
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10 void *context;
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11 PyCapsule_Destructor destructor;
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12 } PyCapsule;
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13
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14
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15
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16 static int
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17 _is_legal_capsule(PyCapsule *capsule, const char *invalid_capsule)
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18 {
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19 if (!capsule || !PyCapsule_CheckExact(capsule) || capsule->pointer == NULL) {
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20 PyErr_SetString(PyExc_ValueError, invalid_capsule);
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21 return 0;
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22 }
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23 return 1;
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24 }
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25
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26 #define is_legal_capsule(capsule, name) \
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27 (_is_legal_capsule(capsule, \
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28 name " called with invalid PyCapsule object"))
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29
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30
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31 static int
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32 name_matches(const char *name1, const char *name2) {
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33 /* if either is NULL, */
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34 if (!name1 || !name2) {
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35 /* they're only the same if they're both NULL. */
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36 return name1 == name2;
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37 }
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38 return !strcmp(name1, name2);
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39 }
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40
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41
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42
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43 PyObject *
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44 PyCapsule_New(void *pointer, const char *name, PyCapsule_Destructor destructor)
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45 {
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46 PyCapsule *capsule;
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47
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48 if (!pointer) {
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49 PyErr_SetString(PyExc_ValueError, "PyCapsule_New called with null pointer");
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50 return NULL;
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51 }
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52
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53 capsule = PyObject_NEW(PyCapsule, &PyCapsule_Type);
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54 if (capsule == NULL) {
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55 return NULL;
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56 }
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57
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58 capsule->pointer = pointer;
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59 capsule->name = name;
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60 capsule->context = NULL;
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61 capsule->destructor = destructor;
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62
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63 return (PyObject *)capsule;
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64 }
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65
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66
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67 int
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68 PyCapsule_IsValid(PyObject *o, const char *name)
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69 {
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70 PyCapsule *capsule = (PyCapsule *)o;
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71
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72 return (capsule != NULL &&
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73 PyCapsule_CheckExact(capsule) &&
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74 capsule->pointer != NULL &&
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75 name_matches(capsule->name, name));
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76 }
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77
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78
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79 void *
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80 PyCapsule_GetPointer(PyObject *o, const char *name)
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81 {
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82 PyCapsule *capsule = (PyCapsule *)o;
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83
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84 if (!is_legal_capsule(capsule, "PyCapsule_GetPointer")) {
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85 return NULL;
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86 }
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87
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88 if (!name_matches(name, capsule->name)) {
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89 PyErr_SetString(PyExc_ValueError, "PyCapsule_GetPointer called with incorrect name");
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90 return NULL;
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91 }
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92
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93 return capsule->pointer;
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94 }
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95
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96
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97 const char *
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98 PyCapsule_GetName(PyObject *o)
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99 {
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100 PyCapsule *capsule = (PyCapsule *)o;
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101
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102 if (!is_legal_capsule(capsule, "PyCapsule_GetName")) {
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103 return NULL;
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104 }
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105 return capsule->name;
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106 }
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107
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108
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109 PyCapsule_Destructor
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110 PyCapsule_GetDestructor(PyObject *o)
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111 {
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112 PyCapsule *capsule = (PyCapsule *)o;
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113
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114 if (!is_legal_capsule(capsule, "PyCapsule_GetDestructor")) {
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115 return NULL;
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116 }
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117 return capsule->destructor;
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118 }
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119
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120
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121 void *
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122 PyCapsule_GetContext(PyObject *o)
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123 {
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124 PyCapsule *capsule = (PyCapsule *)o;
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125
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126 if (!is_legal_capsule(capsule, "PyCapsule_GetContext")) {
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127 return NULL;
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128 }
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129 return capsule->context;
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130 }
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131
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132
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133 int
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134 PyCapsule_SetPointer(PyObject *o, void *pointer)
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135 {
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136 PyCapsule *capsule = (PyCapsule *)o;
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137
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138 if (!pointer) {
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139 PyErr_SetString(PyExc_ValueError, "PyCapsule_SetPointer called with null pointer");
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140 return -1;
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141 }
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142
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143 if (!is_legal_capsule(capsule, "PyCapsule_SetPointer")) {
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144 return -1;
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Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
145 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
146
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
147 capsule->pointer = pointer;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
148 return 0;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
149 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
150
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
151
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
152 int
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
153 PyCapsule_SetName(PyObject *o, const char *name)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
154 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
155 PyCapsule *capsule = (PyCapsule *)o;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
156
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
157 if (!is_legal_capsule(capsule, "PyCapsule_SetName")) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
158 return -1;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
159 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
160
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
161 capsule->name = name;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
162 return 0;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
163 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
164
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
165
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
166 int
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
167 PyCapsule_SetDestructor(PyObject *o, PyCapsule_Destructor destructor)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
168 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
169 PyCapsule *capsule = (PyCapsule *)o;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
170
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
171 if (!is_legal_capsule(capsule, "PyCapsule_SetDestructor")) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
172 return -1;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
173 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
174
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
175 capsule->destructor = destructor;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
176 return 0;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
177 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
178
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
179
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
180 int
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
181 PyCapsule_SetContext(PyObject *o, void *context)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
182 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
183 PyCapsule *capsule = (PyCapsule *)o;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
184
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
185 if (!is_legal_capsule(capsule, "PyCapsule_SetContext")) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
186 return -1;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
187 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
188
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
189 capsule->context = context;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
190 return 0;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
191 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
192
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
193
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
194 void *
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
195 PyCapsule_Import(const char *name, int no_block)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
196 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
197 PyObject *object = NULL;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
198 void *return_value = NULL;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
199 char *trace;
56360
5c0a7800215a Merged revisions 75220 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 54911
diff changeset
200 size_t name_length = (strlen(name) + 1) * sizeof(char);
53816
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
201 char *name_dup = (char *)PyMem_MALLOC(name_length);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
202
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
203 if (!name_dup) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
204 return NULL;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
205 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
206
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
207 memcpy(name_dup, name, name_length);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
208
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
209 trace = name_dup;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
210 while (trace) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
211 char *dot = strchr(trace, '.');
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
212 if (dot) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
213 *dot++ = '\0';
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
214 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
215
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
216 if (object == NULL) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
217 if (no_block) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
218 object = PyImport_ImportModuleNoBlock(trace);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
219 } else {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
220 object = PyImport_ImportModule(trace);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
221 if (!object) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
222 PyErr_Format(PyExc_ImportError, "PyCapsule_Import could not import module \"%s\"", trace);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
223 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
224 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
225 } else {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
226 PyObject *object2 = PyObject_GetAttrString(object, trace);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
227 Py_DECREF(object);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
228 object = object2;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
229 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
230 if (!object) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
231 goto EXIT;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
232 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
233
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
234 trace = dot;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
235 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
236
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
237 /* compare attribute name to module.name by hand */
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
238 if (PyCapsule_IsValid(object, name)) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
239 PyCapsule *capsule = (PyCapsule *)object;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
240 return_value = capsule->pointer;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
241 } else {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
242 PyErr_Format(PyExc_AttributeError,
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
243 "PyCapsule_Import \"%s\" is not valid",
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
244 name);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
245 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
246
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
247 EXIT:
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
248 Py_XDECREF(object);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
249 if (name_dup) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
250 PyMem_FREE(name_dup);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
251 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
252 return return_value;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
253 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
254
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
255
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
256 static void
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
257 capsule_dealloc(PyObject *o)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
258 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
259 PyCapsule *capsule = (PyCapsule *)o;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
260 if (capsule->destructor) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
261 capsule->destructor(o);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
262 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
263 PyObject_DEL(o);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
264 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
265
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
266
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
267 static PyObject *
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
268 capsule_repr(PyObject *o)
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
269 {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
270 PyCapsule *capsule = (PyCapsule *)o;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
271 const char *name;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
272 const char *quote;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
273
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
274 if (capsule->name) {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
275 quote = "\"";
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
276 name = capsule->name;
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
277 } else {
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
278 quote = "";
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
279 name = "NULL";
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
280 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
281
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
282 return PyUnicode_FromFormat("<capsule object %s%s%s at %p>",
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
283 quote, name, quote, capsule);
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
284 }
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
285
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
286
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
287
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
288 PyDoc_STRVAR(PyCapsule_Type__doc__,
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
289 "Capsule objects let you wrap a C \"void *\" pointer in a Python\n\
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
290 object. They're a way of passing data through the Python interpreter\n\
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
291 without creating your own custom type.\n\
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
diff changeset
292 \n\
911df82bc25d add a replacement API for PyCObject, PyCapsule #5630
Benjamin Peterson <benjamin@python.org>
parents:
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293 Capsules are used for communication between extension modules.\n\
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294 They provide a way for an extension module to export a C interface\n\
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295 to other extension modules, so that extension modules can use the\n\
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296 Python import mechanism to link to one another.\n\
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297 ");
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298
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299 PyTypeObject PyCapsule_Type = {
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300 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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301 "PyCapsule", /*tp_name*/
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302 sizeof(PyCapsule), /*tp_basicsize*/
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303 0, /*tp_itemsize*/
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304 /* methods */
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305 capsule_dealloc, /*tp_dealloc*/
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306 0, /*tp_print*/
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307 0, /*tp_getattr*/
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308 0, /*tp_setattr*/
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309 0, /*tp_reserved*/
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310 capsule_repr, /*tp_repr*/
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311 0, /*tp_as_number*/
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312 0, /*tp_as_sequence*/
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313 0, /*tp_as_mapping*/
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314 0, /*tp_hash*/
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315 0, /*tp_call*/
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316 0, /*tp_str*/
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317 0, /*tp_getattro*/
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318 0, /*tp_setattro*/
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319 0, /*tp_as_buffer*/
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320 0, /*tp_flags*/
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321 PyCapsule_Type__doc__ /*tp_doc*/
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322 };
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323
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324