Mercurial > cpython-lru_cache-weakref

annotate Modules/dlmodule.c @ 16413:8819867f14ef legacy-trunk

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Patch derived from Trent's 101162: a Python/C API testing framework. STILL NEEDS UNIX BUILD CHANGES.
author Tim Peters <tim.peters@gmail.com>
date Fri, 02 Feb 2001 05:57:15 +0000
parents 459232a9b804
children 9f86cba4766b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* dl module */
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3
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4 #include "Python.h"
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5
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6 #include <dlfcn.h>
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7
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8 #ifndef RTLD_LAZY
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9 #define RTLD_LAZY 1
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10 #endif
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11
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12 typedef void *PyUnivPtr;
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13 typedef struct {
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14 PyObject_HEAD
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15 PyUnivPtr *dl_handle;
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16 } dlobject;
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17
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18 staticforward PyTypeObject Dltype;
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19
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20 static PyObject *Dlerror;
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21
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22 static PyObject *
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23 newdlobject(PyUnivPtr *handle)
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24 {
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25 dlobject *xp;
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26 xp = PyObject_New(dlobject, &Dltype);
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27 if (xp == NULL)
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28 return NULL;
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29 xp->dl_handle = handle;
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30 return (PyObject *)xp;
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31 }
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32
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33 static void
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34 dl_dealloc(dlobject *xp)
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35 {
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36 if (xp->dl_handle != NULL)
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37 dlclose(xp->dl_handle);
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38 PyObject_Del(xp);
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39 }
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40
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41 static PyObject *
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42 dl_close(dlobject *xp, PyObject *args)
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43 {
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44 if (!PyArg_Parse(args, ""))
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45 return NULL;
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46 if (xp->dl_handle != NULL) {
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47 dlclose(xp->dl_handle);
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48 xp->dl_handle = NULL;
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49 }
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50 Py_INCREF(Py_None);
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51 return Py_None;
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52 }
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53
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54 static PyObject *
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55 dl_sym(dlobject *xp, PyObject *args)
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56 {
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57 char *name;
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58 PyUnivPtr *func;
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59 if (!PyArg_Parse(args, "s", &name))
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60 return NULL;
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61 func = dlsym(xp->dl_handle, name);
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62 if (func == NULL) {
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63 Py_INCREF(Py_None);
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64 return Py_None;
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65 }
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66 return PyInt_FromLong((long)func);
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67 }
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68
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69 static PyObject *
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70 dl_call(dlobject *xp, PyObject *args)
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71 {
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72 PyObject *name;
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73 long (*func)(long, long, long, long, long,
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74 long, long, long, long, long);
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75 long alist[10];
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76 long res;
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77 int i;
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78 int n = PyTuple_Size(args);
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79 if (n < 1) {
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80 PyErr_SetString(PyExc_TypeError, "at least a name is needed");
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81 return NULL;
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82 }
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83 name = PyTuple_GetItem(args, 0);
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84 if (!PyString_Check(name)) {
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85 PyErr_SetString(PyExc_TypeError,
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86 "function name must be a string");
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87 return NULL;
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88 }
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89 func = dlsym(xp->dl_handle, PyString_AsString(name));
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90 if (func == NULL) {
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91 PyErr_SetString(PyExc_ValueError, dlerror());
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92 return NULL;
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93 }
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94 if (n-1 > 10) {
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95 PyErr_SetString(PyExc_TypeError,
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96 "too many arguments (max 10)");
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97 return NULL;
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98 }
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99 for (i = 1; i < n; i++) {
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100 PyObject *v = PyTuple_GetItem(args, i);
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101 if (PyInt_Check(v))
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102 alist[i-1] = PyInt_AsLong(v);
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103 else if (PyString_Check(v))
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104 alist[i-1] = (long)PyString_AsString(v);
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105 else if (v == Py_None)
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106 alist[i-1] = (long) ((char *)NULL);
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107 else {
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108 PyErr_SetString(PyExc_TypeError,
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109 "arguments must be int, string or None");
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110 return NULL;
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111 }
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112 }
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113 for (; i <= 10; i++)
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114 alist[i-1] = 0;
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115 res = (*func)(alist[0], alist[1], alist[2], alist[3], alist[4],
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116 alist[5], alist[6], alist[7], alist[8], alist[9]);
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117 return PyInt_FromLong(res);
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118 }
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119
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120 static PyMethodDef dlobject_methods[] = {
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121 {"call", (PyCFunction)dl_call, 1 /* varargs */},
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122 {"sym", (PyCFunction)dl_sym},
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123 {"close", (PyCFunction)dl_close},
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124 {NULL, NULL} /* Sentinel */
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125 };
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126
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127 static PyObject *
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128 dl_getattr(dlobject *xp, char *name)
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129 {
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130 return Py_FindMethod(dlobject_methods, (PyObject *)xp, name);
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131 }
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132
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133
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134 static PyTypeObject Dltype = {
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135 PyObject_HEAD_INIT(&PyType_Type)
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136 0, /*ob_size*/
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137 "dl", /*tp_name*/
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138 sizeof(dlobject), /*tp_basicsize*/
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139 0, /*tp_itemsize*/
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140 /* methods */
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141 (destructor)dl_dealloc, /*tp_dealloc*/
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142 0, /*tp_print*/
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143 (getattrfunc)dl_getattr,/*tp_getattr*/
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144 0, /*tp_setattr*/
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145 0, /*tp_compare*/
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146 0, /*tp_repr*/
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147 0, /*tp_as_number*/
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148 0, /*tp_as_sequence*/
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149 0, /*tp_as_mapping*/
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150 0, /*tp_hash*/
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151 };
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152
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153 static PyObject *
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154 dl_open(PyObject *self, PyObject *args)
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155 {
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156 char *name;
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157 int mode;
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158 PyUnivPtr *handle;
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159 if (PyArg_Parse(args, "z", &name))
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160 mode = RTLD_LAZY;
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161 else {
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162 PyErr_Clear();
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163 if (!PyArg_Parse(args, "(zi)", &name, &mode))
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164 return NULL;
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165 #ifndef RTLD_NOW
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166 if (mode != RTLD_LAZY) {
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167 PyErr_SetString(PyExc_ValueError, "mode must be 1");
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168 return NULL;
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169 }
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170 #endif
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171 }
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172 handle = dlopen(name, mode);
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173 if (handle == NULL) {
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174 PyErr_SetString(Dlerror, dlerror());
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175 return NULL;
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176 }
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177 return newdlobject(handle);
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178 }
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179
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180 static PyMethodDef dl_methods[] = {
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181 {"open", dl_open},
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182 {NULL, NULL} /* sentinel */
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183 };
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184
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185 /* From socketmodule.c
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186 * Convenience routine to export an integer value.
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187 *
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188 * Errors are silently ignored, for better or for worse...
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189 */
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190 static void
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191 insint(PyObject *d, char *name, int value)
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192 {
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193 PyObject *v = PyInt_FromLong((long) value);
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194 if (!v || PyDict_SetItemString(d, name, v))
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195 PyErr_Clear();
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196
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197 Py_XDECREF(v);
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198 }
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199
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200 void
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201 initdl(void)
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202 {
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203 PyObject *m, *d, *x;
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204
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205 if (sizeof(int) != sizeof(long) ||
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206 sizeof(long) != sizeof(char *)) {
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207 PyErr_SetString(PyExc_SystemError,
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208 "module dl requires sizeof(int) == sizeof(long) == sizeof(char*)");
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209 return;
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210 }
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211
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212 /* Create the module and add the functions */
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213 m = Py_InitModule("dl", dl_methods);
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214
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215 /* Add some symbolic constants to the module */
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216 d = PyModule_GetDict(m);
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217 Dlerror = x = PyErr_NewException("dl.error", NULL, NULL);
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218 PyDict_SetItemString(d, "error", x);
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219 x = PyInt_FromLong((long)RTLD_LAZY);
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220 PyDict_SetItemString(d, "RTLD_LAZY", x);
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221 #define INSINT(X) insint(d,#X,X)
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222 #ifdef RTLD_NOW
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223 INSINT(RTLD_NOW);
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224 #endif
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225 #ifdef RTLD_NOLOAD
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226 INSINT(RTLD_NOLOAD);
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227 #endif
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228 #ifdef RTLD_GLOBAL
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229 INSINT(RTLD_GLOBAL);
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230 #endif
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231 #ifdef RTLD_LOCAL
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232 INSINT(RTLD_LOCAL);
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233 #endif
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234 #ifdef RTLD_PARENT
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235 INSINT(RTLD_PARENT);
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236 #endif
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237 #ifdef RTLD_GROUP
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238 INSINT(RTLD_GROUP);
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239 #endif
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240 #ifdef RTLD_WORLD
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241 INSINT(RTLD_WORLD);
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242 #endif
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243 #ifdef RTLD_NODELETE
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244 INSINT(RTLD_NODELETE);
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245 #endif
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246 }