Mercurial > cpython-lru_cache-weakref

annotate Modules/resource.c @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 73325019ad39
children f7fc88fcffa2
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1 #include "Python.h"
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2 #include <sys/resource.h>
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3 #include <sys/time.h>
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4 #include <unistd.h>
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5 #include <string.h>
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6 #include <errno.h>
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7
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8 /* don't know why this isn't defined in a header file */
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9 #ifndef getrusage
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10 int getrusage(int who, struct rusage *rusage);
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11 #endif
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12
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13 #ifndef getpagesize
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14 int getpagesize(void);
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15 #endif
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16
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17 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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18
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19 static PyObject *ResourceError;
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20
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21 static PyObject *
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22 resource_getrusage(self, args)
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23 PyObject *self;
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24 PyObject *args;
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25 {
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26 int who;
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27 struct rusage ru;
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28
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29 if (!PyArg_ParseTuple(args, "i", &who))
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30 return NULL;
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31
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32 if (getrusage(who, &ru) == -1) {
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33 if (errno == EINVAL) {
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34 PyErr_SetString(PyExc_ValueError,
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35 "invalid who parameter");
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36 return NULL;
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37 }
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38 PyErr_SetFromErrno(ResourceError);
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39 return NULL;
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40 }
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41
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42 /* Yeah, this 16-tuple is way ugly. It's probably a lot less
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43 ugly than a dictionary with keys (or object attributes)
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44 named things like 'ixrss'.
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45 */
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46 return Py_BuildValue(
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47 "ddiiiiiiiiiiiiii",
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48 doubletime(ru.ru_utime), /* user time used */
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49 doubletime(ru.ru_stime), /* system time used */
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50 ru.ru_maxrss, /* max. resident set size */
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51 ru.ru_ixrss, /* shared memory size */
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52 ru.ru_idrss, /* unshared memory size */
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53 ru.ru_isrss, /* unshared stack size */
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54 ru.ru_minflt, /* page faults not requiring I/O*/
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55 ru.ru_majflt, /* page faults requiring I/O */
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56 ru.ru_nswap, /* number of swap outs */
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57 ru.ru_inblock, /* block input operations */
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58 ru.ru_oublock, /* block output operations */
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59 ru.ru_msgsnd, /* messages sent */
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60 ru.ru_msgrcv, /* messages received */
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61 ru.ru_nsignals, /* signals received */
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62 ru.ru_nvcsw, /* voluntary context switchs */
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63 ru.ru_nivcsw /* involuntary context switchs */
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64 );
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65 }
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66
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67
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68 static PyObject *
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69 resource_getrlimit(self, args)
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70 PyObject *self;
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71 PyObject *args;
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72 {
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73 struct rlimit rl;
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74 int resource;
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75
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76 if (!PyArg_ParseTuple(args, "i", &resource))
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77 return NULL;
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78
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79 if (resource < 0 || resource >= RLIM_NLIMITS) {
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80 PyErr_SetString(PyExc_ValueError,
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81 "invalid resource specified");
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82 return NULL;
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83 }
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84
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85 if (getrlimit(resource, &rl) == -1) {
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86 PyErr_SetFromErrno(ResourceError);
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87 return NULL;
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88 }
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89 return Py_BuildValue("ii", rl.rlim_cur, rl.rlim_max);
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90 }
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91
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92 static PyObject *
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93 resource_setrlimit(self, args)
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94 PyObject *self;
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95 PyObject *args;
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96 {
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97 struct rlimit rl;
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98 int resource;
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99
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100 if (!PyArg_ParseTuple(args, "i(ii)", &resource, &rl.rlim_cur,
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101 &rl.rlim_max))
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102 return NULL;
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103
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104 if (resource < 0 || resource >= RLIM_NLIMITS) {
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105 PyErr_SetString(PyExc_ValueError,
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106 "invalid resource specified");
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107 return NULL;
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108 }
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109
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110 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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111 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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112 if (setrlimit(resource, &rl) == -1) {
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113 if (errno == EINVAL)
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114 PyErr_SetString(PyExc_ValueError,
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115 "current limit exceeds maximum limit");
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116 else if (errno == EPERM)
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117 PyErr_SetString(PyExc_ValueError,
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118 "not allowed to raise maximum limit");
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119 else
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120 PyErr_SetFromErrno(ResourceError);
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121 return NULL;
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122 }
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123 Py_INCREF(Py_None);
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124 return Py_None;
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125 }
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126
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127 static PyObject *
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128 resource_getpagesize(self, args)
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129 PyObject *self;
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130 PyObject *args;
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131 {
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132 if (!PyArg_ParseTuple(args, ""))
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133 return NULL;
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134 return Py_BuildValue("i", getpagesize());
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135 }
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136
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137 /* List of functions */
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138
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139 static struct PyMethodDef
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140 resource_methods[] = {
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141 {"getrusage", resource_getrusage, 1},
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142 {"getrlimit", resource_getrlimit, 1},
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143 {"setrlimit", resource_setrlimit, 1},
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144 {"getpagesize", resource_getpagesize, 1},
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145 {NULL, NULL} /* sentinel */
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146 };
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147
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148
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149 /* Module initialization */
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150
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151 static void
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152 ins(PyObject *dict, char *name, int value)
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153 {
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154 PyObject *v = PyInt_FromLong((long) value);
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155 if (v) {
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156 PyDict_SetItemString(dict, name, v);
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157 Py_DECREF(v);
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158 }
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159 /* errors will be checked by initresource() */
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160 }
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161
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162 void initresource()
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163 {
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164 PyObject *m, *d;
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165
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166 /* Create the module and add the functions */
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167 m = Py_InitModule("resource", resource_methods);
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168
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169 /* Add some symbolic constants to the module */
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170 d = PyModule_GetDict(m);
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171 ResourceError = PyString_FromString("resource.error");
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172 PyDict_SetItemString(d, "error", ResourceError);
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173
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174 /* insert constants */
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175 #ifdef RLIMIT_CPU
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176 ins(d, "RLIMIT_CPU", RLIMIT_CPU);
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177 #endif
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178
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179 #ifdef RLIMIT_FSIZE
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180 ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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181 #endif
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182
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183 #ifdef RLIMIT_DATA
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184 ins(d, "RLIMIT_DATA", RLIMIT_DATA);
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185 #endif
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186
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187 #ifdef RLIMIT_STACK
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188 ins(d, "RLIMIT_STACK", RLIMIT_STACK);
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189 #endif
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190
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191 #ifdef RLIMIT_CORE
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192 ins(d, "RLIMIT_CORE", RLIMIT_CORE);
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193 #endif
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194
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195 #ifdef RLIMIT_NOFILE
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196 ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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197 #endif
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198
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199 #ifdef RLIMIT_OFILE
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200 ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
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201 #endif
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202
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203 #ifdef RLIMIT_VMEM
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204 ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
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205 #endif
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206
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207 #ifdef RLIMIT_AS
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208 ins(d, "RLIMIT_AS", RLIMIT_AS);
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209 #endif
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210
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211 #ifdef RLIMIT_RSS
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212 ins(d, "RLIMIT_RSS", RLIMIT_RSS);
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213 #endif
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214
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215 #ifdef RLIMIT_NPROC
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216 ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
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217 #endif
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218
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219 #ifdef RLIMIT_MEMLOCK
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220 ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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221 #endif
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222
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223 #ifdef RUSAGE_SELF
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224 ins(d, "RUSAGE_SELF", RUSAGE_SELF);
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225 #endif
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226
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227 #ifdef RUSAGE_CHILDERN
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228 ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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229 #endif
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230
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231 #ifdef RUSAGE_BOTH
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232 ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
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233 #endif
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234
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235 /* Check for errors */
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236 if (PyErr_Occurred())
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237 Py_FatalError("can't initialize module resource");
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238 }