Mercurial > cpython-lru_cache-weakref

annotate Modules/resource.c @ 25838:8540887bcec6 2.2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents e223397b26fa
children 40631ae74b17
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1da122718598 Added std copyright notice.
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1
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2 #include "Python.h"
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3 #include <sys/resource.h>
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4 #include <sys/time.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 /* On some systems, these aren't in any header file.
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9 On others they are, with inconsistent prototypes.
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10 We declare the (default) return type, to shut up gcc -Wall;
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11 but we can't declare the prototype, to avoid errors
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12 when the header files declare it different.
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13 Worse, on some Linuxes, getpagesize() returns a size_t... */
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14
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15 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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16
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17 static PyObject *ResourceError;
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18
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19 static PyObject *
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20 resource_getrusage(PyObject *self, PyObject *args)
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21 {
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22 int who;
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23 struct rusage ru;
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24
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25 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
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26 return NULL;
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27
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28 if (getrusage(who, &ru) == -1) {
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29 if (errno == EINVAL) {
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30 PyErr_SetString(PyExc_ValueError,
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31 "invalid who parameter");
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32 return NULL;
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33 }
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34 PyErr_SetFromErrno(ResourceError);
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35 return NULL;
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36 }
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37
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38 /* Yeah, this 16-tuple is way ugly. It's probably a lot less
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39 ugly than a dictionary with keys (or object attributes)
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40 named things like 'ixrss'.
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41 */
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42 return Py_BuildValue(
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43 "ddiiiiiiiiiiiiii",
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44 doubletime(ru.ru_utime), /* user time used */
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45 doubletime(ru.ru_stime), /* system time used */
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46 ru.ru_maxrss, /* max. resident set size */
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47 ru.ru_ixrss, /* shared memory size */
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48 ru.ru_idrss, /* unshared memory size */
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49 ru.ru_isrss, /* unshared stack size */
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50 ru.ru_minflt, /* page faults not requiring I/O*/
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51 ru.ru_majflt, /* page faults requiring I/O */
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52 ru.ru_nswap, /* number of swap outs */
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53 ru.ru_inblock, /* block input operations */
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54 ru.ru_oublock, /* block output operations */
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55 ru.ru_msgsnd, /* messages sent */
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56 ru.ru_msgrcv, /* messages received */
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57 ru.ru_nsignals, /* signals received */
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58 ru.ru_nvcsw, /* voluntary context switches */
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59 ru.ru_nivcsw /* involuntary context switches */
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60 );
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61 }
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62
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63
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64 static PyObject *
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65 resource_getrlimit(PyObject *self, PyObject *args)
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66 {
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67 struct rlimit rl;
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68 int resource;
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69
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70 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
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71 return NULL;
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72
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73 if (resource < 0 || resource >= RLIM_NLIMITS) {
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74 PyErr_SetString(PyExc_ValueError,
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75 "invalid resource specified");
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76 return NULL;
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77 }
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78
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79 if (getrlimit(resource, &rl) == -1) {
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80 PyErr_SetFromErrno(ResourceError);
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81 return NULL;
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82 }
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83
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84 #if defined(HAVE_LONG_LONG)
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85 if (sizeof(rl.rlim_cur) > sizeof(long)) {
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86 return Py_BuildValue("LL",
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87 (LONG_LONG) rl.rlim_cur,
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88 (LONG_LONG) rl.rlim_max);
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89 }
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90 #endif
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91 return Py_BuildValue("ii", (long) rl.rlim_cur, (long) rl.rlim_max);
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92 }
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93
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94 static PyObject *
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95 resource_setrlimit(PyObject *self, 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 PyObject *curobj, *maxobj;
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100
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101 if (!PyArg_ParseTuple(args, "i(OO):setrlimit", &resource, &curobj, &maxobj))
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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 #if !defined(HAVE_LARGEFILE_SUPPORT)
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111 rl.rlim_cur = PyInt_AsLong(curobj);
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112 rl.rlim_max = PyInt_AsLong(maxobj);
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113 #else
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114 /* The limits are probably bigger than a long */
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115 rl.rlim_cur = PyLong_Check(curobj) ?
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116 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
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117 rl.rlim_max = PyLong_Check(maxobj) ?
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118 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
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119 #endif
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120
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121 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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122 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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123 if (setrlimit(resource, &rl) == -1) {
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124 if (errno == EINVAL)
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125 PyErr_SetString(PyExc_ValueError,
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126 "current limit exceeds maximum limit");
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127 else if (errno == EPERM)
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128 PyErr_SetString(PyExc_ValueError,
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129 "not allowed to raise maximum limit");
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130 else
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131 PyErr_SetFromErrno(ResourceError);
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132 return NULL;
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133 }
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134 Py_INCREF(Py_None);
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135 return Py_None;
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136 }
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137
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138 static PyObject *
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139 resource_getpagesize(PyObject *self, PyObject *args)
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140 {
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141 if (!PyArg_ParseTuple(args, ":getpagesize"))
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142 return NULL;
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143 return Py_BuildValue("i", getpagesize());
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144 }
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145
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146 /* List of functions */
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147
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148 static struct PyMethodDef
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149 resource_methods[] = {
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150 {"getrusage", resource_getrusage, 1},
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151 {"getrlimit", resource_getrlimit, 1},
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152 {"setrlimit", resource_setrlimit, 1},
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153 {"getpagesize", resource_getpagesize, 1},
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154 {NULL, NULL} /* sentinel */
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155 };
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156
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157
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158 /* Module initialization */
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159
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160 static void
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161 ins(PyObject *dict, char *name, int value)
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162 {
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163 PyObject *v = PyInt_FromLong((long) value);
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164 if (v) {
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165 PyDict_SetItemString(dict, name, v);
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166 Py_DECREF(v);
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167 }
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168 /* errors will be checked by initresource() */
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169 }
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170
19935
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171 DL_EXPORT(void)
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172 initresource(void)
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173 {
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174 PyObject *m, *d;
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175
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176 /* Create the module and add the functions */
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177 m = Py_InitModule("resource", resource_methods);
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178
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179 /* Add some symbolic constants to the module */
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180 d = PyModule_GetDict(m);
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181 ResourceError = PyErr_NewException("resource.error", NULL, NULL);
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182 PyDict_SetItemString(d, "error", ResourceError);
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183
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184 /* insert constants */
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185 #ifdef RLIMIT_CPU
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186 ins(d, "RLIMIT_CPU", RLIMIT_CPU);
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187 #endif
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188
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189 #ifdef RLIMIT_FSIZE
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190 ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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191 #endif
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192
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193 #ifdef RLIMIT_DATA
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194 ins(d, "RLIMIT_DATA", RLIMIT_DATA);
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195 #endif
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196
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197 #ifdef RLIMIT_STACK
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198 ins(d, "RLIMIT_STACK", RLIMIT_STACK);
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199 #endif
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200
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201 #ifdef RLIMIT_CORE
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202 ins(d, "RLIMIT_CORE", RLIMIT_CORE);
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203 #endif
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204
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205 #ifdef RLIMIT_NOFILE
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206 ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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207 #endif
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208
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209 #ifdef RLIMIT_OFILE
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210 ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
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211 #endif
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212
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213 #ifdef RLIMIT_VMEM
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214 ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
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215 #endif
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216
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217 #ifdef RLIMIT_AS
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218 ins(d, "RLIMIT_AS", RLIMIT_AS);
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219 #endif
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220
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221 #ifdef RLIMIT_RSS
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222 ins(d, "RLIMIT_RSS", RLIMIT_RSS);
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223 #endif
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224
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225 #ifdef RLIMIT_NPROC
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226 ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
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227 #endif
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228
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229 #ifdef RLIMIT_MEMLOCK
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230 ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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231 #endif
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232
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233 #ifdef RUSAGE_SELF
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234 ins(d, "RUSAGE_SELF", RUSAGE_SELF);
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235 #endif
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236
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237 #ifdef RUSAGE_CHILDREN
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238 ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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239 #endif
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240
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241 #ifdef RUSAGE_BOTH
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242 ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
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243 #endif
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244 }