Mercurial > cpython-lru_cache-weakref

annotate Objects/cobject.c @ 64166:d0e9febfa00a 3.1

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Merged revisions 84172 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r84172 | martin.v.loewis | 2010-08-18 18:12:23 +0200 (Mi, 18 Aug 2010) | 2 lines Restore GIL in nis_cat in case of error. ........
author Martin v. Löwis <martin@v.loewis.de>
date Thu, 19 Aug 2010 09:03:03 +0000
parents 7cb6df00699f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Wrap void* pointers to be passed between C modules */
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3
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4 #include "Python.h"
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5
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6
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7 /* Declarations for objects of type PyCObject */
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8
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9 typedef void (*destructor1)(void *);
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10 typedef void (*destructor2)(void *, void*);
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11
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12
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13 static int deprecation_exception(void)
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14 {
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15 return PyErr_WarnEx(PyExc_PendingDeprecationWarning,
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16 "The CObject API is deprecated as of Python 3.1. "
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17 "Please convert to using the Capsule API.", 1);
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18 }
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19
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20 PyObject *
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21 PyCObject_FromVoidPtr(void *cobj, void (*destr)(void *))
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22 {
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23 PyCObject *self;
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24
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25 if (deprecation_exception()) {
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26 return NULL;
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27 }
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28
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29 self = PyObject_NEW(PyCObject, &PyCObject_Type);
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30 if (self == NULL)
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31 return NULL;
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32 self->cobject=cobj;
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33 self->destructor=destr;
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34 self->desc=NULL;
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35
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36 return (PyObject *)self;
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37 }
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38
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39 PyObject *
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40 PyCObject_FromVoidPtrAndDesc(void *cobj, void *desc,
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41 void (*destr)(void *, void *))
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42 {
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43 PyCObject *self;
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44
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45 if (deprecation_exception()) {
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46 return NULL;
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47 }
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48
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49 if (!desc) {
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50 PyErr_SetString(PyExc_TypeError,
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51 "PyCObject_FromVoidPtrAndDesc called with null"
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52 " description");
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53 return NULL;
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54 }
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55 self = PyObject_NEW(PyCObject, &PyCObject_Type);
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56 if (self == NULL)
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57 return NULL;
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58 self->cobject = cobj;
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59 self->destructor = (destructor1)destr;
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60 self->desc = desc;
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61
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62 return (PyObject *)self;
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63 }
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64
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65 void *
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66 PyCObject_AsVoidPtr(PyObject *self)
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67 {
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68 if (self) {
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69 if (self->ob_type == &PyCObject_Type)
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70 return ((PyCObject *)self)->cobject;
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71 PyErr_SetString(PyExc_TypeError,
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72 "PyCObject_AsVoidPtr with non-C-object");
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73 }
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74 if (!PyErr_Occurred())
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75 PyErr_SetString(PyExc_TypeError,
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76 "PyCObject_AsVoidPtr called with null pointer");
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77 return NULL;
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78 }
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79
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80 void *
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81 PyCObject_GetDesc(PyObject *self)
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82 {
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83 if (self) {
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84 if (self->ob_type == &PyCObject_Type)
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85 return ((PyCObject *)self)->desc;
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86 PyErr_SetString(PyExc_TypeError,
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87 "PyCObject_GetDesc with non-C-object");
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88 }
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89 if (!PyErr_Occurred())
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90 PyErr_SetString(PyExc_TypeError,
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91 "PyCObject_GetDesc called with null pointer");
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92 return NULL;
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93 }
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94
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95 void *
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96 PyCObject_Import(char *module_name, char *name)
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97 {
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98 PyObject *m, *c;
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99 void *r = NULL;
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100
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101 if ((m = PyImport_ImportModule(module_name))) {
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102 if ((c = PyObject_GetAttrString(m,name))) {
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103 r = PyCObject_AsVoidPtr(c);
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104 Py_DECREF(c);
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105 }
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106 Py_DECREF(m);
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107 }
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108 return r;
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109 }
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110
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111 int
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112 PyCObject_SetVoidPtr(PyObject *self, void *cobj)
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113 {
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114 PyCObject* cself = (PyCObject*)self;
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115 if (cself == NULL || !PyCObject_Check(cself) ||
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116 cself->destructor != NULL) {
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117 PyErr_SetString(PyExc_TypeError,
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118 "Invalid call to PyCObject_SetVoidPtr");
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119 return 0;
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120 }
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121 cself->cobject = cobj;
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122 return 1;
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123 }
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124
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125 static void
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126 PyCObject_dealloc(PyCObject *self)
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127 {
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128 if (self->destructor) {
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129 if(self->desc)
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130 ((destructor2)(self->destructor))(self->cobject, self->desc);
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131 else
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132 (self->destructor)(self->cobject);
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133 }
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134 PyObject_DEL(self);
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135 }
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136
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137
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138 PyDoc_STRVAR(PyCObject_Type__doc__,
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139 "C objects to be exported from one extension module to another\n\
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140 \n\
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141 C objects are used for communication between extension modules. They\n\
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142 provide a way for an extension module to export a C interface to other\n\
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143 extension modules, so that extension modules can use the Python import\n\
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144 mechanism to link to one another.");
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Guido van Rossum <guido@python.org>
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145
44f48aaca8bf opaque C object a la Jim Fulton
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146 PyTypeObject PyCObject_Type = {
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Martin v. Löwis <martin@v.loewis.de>
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147 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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148 "PyCObject", /*tp_name*/
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149 sizeof(PyCObject), /*tp_basicsize*/
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150 0, /*tp_itemsize*/
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Fred Drake <fdrake@acm.org>
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151 /* methods */
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152 (destructor)PyCObject_dealloc, /*tp_dealloc*/
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153 0, /*tp_print*/
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154 0, /*tp_getattr*/
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155 0, /*tp_setattr*/
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Mark Dickinson <dickinsm@gmail.com>
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156 0, /*tp_reserved*/
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157 0, /*tp_repr*/
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158 0, /*tp_as_number*/
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159 0, /*tp_as_sequence*/
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160 0, /*tp_as_mapping*/
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161 0, /*tp_hash*/
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162 0, /*tp_call*/
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163 0, /*tp_str*/
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164 0, /*tp_getattro*/
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165 0, /*tp_setattro*/
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166 0, /*tp_as_buffer*/
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167 0, /*tp_flags*/
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168 PyCObject_Type__doc__ /*tp_doc*/
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169 };