Mercurial > cpython-lru_cache-weakref

annotate Modules/resource.c @ 21283:d4907cdcc299 legacy-trunk

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Use an immutable tuple for __slots instead of a mutable list Bump version number
author Andrew M. Kuchling <amk@amk.ca>
date Fri, 07 Dec 2001 14:22:13 +0000
parents 619a2d6b5ea9
children c64fc56f6072
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6052
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 <unistd.h>
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6 #include <string.h>
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7 #include <errno.h>
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8
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9 /* On some systems, these aren't in any header file.
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10 On others they are, with inconsistent prototypes.
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11 We declare the (default) return type, to shut up gcc -Wall;
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12 but we can't declare the prototype, to avoid errors
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13 when the header files declare it different.
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14 Worse, on some Linuxes, getpagesize() returns a size_t... */
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15
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16 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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17
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18 static PyObject *ResourceError;
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19
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20 static PyObject *
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21 resource_getrusage(PyObject *self, PyObject *args)
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22 {
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23 int who;
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24 struct rusage ru;
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25
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26 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
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27 return NULL;
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28
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29 if (getrusage(who, &ru) == -1) {
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30 if (errno == EINVAL) {
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31 PyErr_SetString(PyExc_ValueError,
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32 "invalid who parameter");
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33 return NULL;
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34 }
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35 PyErr_SetFromErrno(ResourceError);
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36 return NULL;
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37 }
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38
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39 /* Yeah, this 16-tuple is way ugly. It's probably a lot less
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40 ugly than a dictionary with keys (or object attributes)
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41 named things like 'ixrss'.
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42 */
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43 return Py_BuildValue(
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44 "ddiiiiiiiiiiiiii",
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45 doubletime(ru.ru_utime), /* user time used */
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46 doubletime(ru.ru_stime), /* system time used */
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47 ru.ru_maxrss, /* max. resident set size */
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48 ru.ru_ixrss, /* shared memory size */
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49 ru.ru_idrss, /* unshared memory size */
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50 ru.ru_isrss, /* unshared stack size */
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51 ru.ru_minflt, /* page faults not requiring I/O*/
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52 ru.ru_majflt, /* page faults requiring I/O */
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53 ru.ru_nswap, /* number of swap outs */
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54 ru.ru_inblock, /* block input operations */
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55 ru.ru_oublock, /* block output operations */
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56 ru.ru_msgsnd, /* messages sent */
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57 ru.ru_msgrcv, /* messages received */
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58 ru.ru_nsignals, /* signals received */
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59 ru.ru_nvcsw, /* voluntary context switches */
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60 ru.ru_nivcsw /* involuntary context switches */
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61 );
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62 }
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63
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64
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65 static PyObject *
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66 resource_getrlimit(PyObject *self, PyObject *args)
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67 {
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68 struct rlimit rl;
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69 int resource;
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70
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71 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
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72 return NULL;
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73
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74 if (resource < 0 || resource >= RLIM_NLIMITS) {
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75 PyErr_SetString(PyExc_ValueError,
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76 "invalid resource specified");
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77 return NULL;
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78 }
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79
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80 if (getrlimit(resource, &rl) == -1) {
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81 PyErr_SetFromErrno(ResourceError);
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82 return NULL;
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83 }
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84
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85 #if defined(HAVE_LONG_LONG)
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86 if (sizeof(rl.rlim_cur) > sizeof(long)) {
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87 return Py_BuildValue("LL",
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88 (LONG_LONG) rl.rlim_cur,
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89 (LONG_LONG) rl.rlim_max);
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90 }
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91 #endif
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92 return Py_BuildValue("ii", (long) rl.rlim_cur, (long) rl.rlim_max);
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93 }
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94
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95 static PyObject *
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96 resource_setrlimit(PyObject *self, PyObject *args)
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97 {
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98 struct rlimit rl;
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99 int resource;
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100 PyObject *curobj, *maxobj;
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101
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102 if (!PyArg_ParseTuple(args, "i(OO):setrlimit", &resource, &curobj, &maxobj))
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103 return NULL;
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104
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105 if (resource < 0 || resource >= RLIM_NLIMITS) {
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106 PyErr_SetString(PyExc_ValueError,
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107 "invalid resource specified");
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108 return NULL;
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109 }
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110
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111 #if !defined(HAVE_LARGEFILE_SUPPORT)
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112 rl.rlim_cur = PyInt_AsLong(curobj);
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113 rl.rlim_max = PyInt_AsLong(maxobj);
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114 #else
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115 /* The limits are probably bigger than a long */
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116 rl.rlim_cur = PyLong_Check(curobj) ?
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117 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
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118 rl.rlim_max = PyLong_Check(maxobj) ?
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119 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
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120 #endif
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121
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122 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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123 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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124 if (setrlimit(resource, &rl) == -1) {
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125 if (errno == EINVAL)
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126 PyErr_SetString(PyExc_ValueError,
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127 "current limit exceeds maximum limit");
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128 else if (errno == EPERM)
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129 PyErr_SetString(PyExc_ValueError,
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130 "not allowed to raise maximum limit");
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131 else
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132 PyErr_SetFromErrno(ResourceError);
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133 return NULL;
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134 }
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135 Py_INCREF(Py_None);
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136 return Py_None;
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137 }
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138
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139 static PyObject *
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140 resource_getpagesize(PyObject *self, PyObject *args)
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141 {
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142 if (!PyArg_ParseTuple(args, ":getpagesize"))
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143 return NULL;
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144 return Py_BuildValue("i", getpagesize());
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145 }
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146
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147 /* List of functions */
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148
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149 static struct PyMethodDef
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150 resource_methods[] = {
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151 {"getrusage", resource_getrusage, 1},
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152 {"getrlimit", resource_getrlimit, 1},
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153 {"setrlimit", resource_setrlimit, 1},
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154 {"getpagesize", resource_getpagesize, 1},
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155 {NULL, NULL} /* sentinel */
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156 };
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157
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158
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159 /* Module initialization */
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160
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161 static void
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162 ins(PyObject *dict, char *name, int value)
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163 {
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164 PyObject *v = PyInt_FromLong((long) value);
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165 if (v) {
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166 PyDict_SetItemString(dict, name, v);
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167 Py_DECREF(v);
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168 }
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169 /* errors will be checked by initresource() */
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170 }
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171
19935
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172 DL_EXPORT(void)
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173 initresource(void)
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174 {
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175 PyObject *m, *d;
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176
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177 /* Create the module and add the functions */
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178 m = Py_InitModule("resource", resource_methods);
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179
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180 /* Add some symbolic constants to the module */
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181 d = PyModule_GetDict(m);
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182 ResourceError = PyErr_NewException("resource.error", NULL, NULL);
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183 PyDict_SetItemString(d, "error", ResourceError);
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184
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185 /* insert constants */
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186 #ifdef RLIMIT_CPU
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187 ins(d, "RLIMIT_CPU", RLIMIT_CPU);
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188 #endif
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189
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190 #ifdef RLIMIT_FSIZE
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191 ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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192 #endif
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193
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194 #ifdef RLIMIT_DATA
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195 ins(d, "RLIMIT_DATA", RLIMIT_DATA);
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196 #endif
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197
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198 #ifdef RLIMIT_STACK
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199 ins(d, "RLIMIT_STACK", RLIMIT_STACK);
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200 #endif
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201
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202 #ifdef RLIMIT_CORE
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203 ins(d, "RLIMIT_CORE", RLIMIT_CORE);
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204 #endif
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205
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206 #ifdef RLIMIT_NOFILE
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207 ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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208 #endif
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209
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210 #ifdef RLIMIT_OFILE
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211 ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
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212 #endif
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213
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214 #ifdef RLIMIT_VMEM
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215 ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
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216 #endif
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217
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218 #ifdef RLIMIT_AS
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219 ins(d, "RLIMIT_AS", RLIMIT_AS);
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220 #endif
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221
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222 #ifdef RLIMIT_RSS
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223 ins(d, "RLIMIT_RSS", RLIMIT_RSS);
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224 #endif
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225
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226 #ifdef RLIMIT_NPROC
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227 ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
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228 #endif
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229
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230 #ifdef RLIMIT_MEMLOCK
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231 ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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232 #endif
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233
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234 #ifdef RUSAGE_SELF
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235 ins(d, "RUSAGE_SELF", RUSAGE_SELF);
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236 #endif
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237
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238 #ifdef RUSAGE_CHILDREN
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239 ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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240 #endif
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241
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242 #ifdef RUSAGE_BOTH
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243 ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
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244 #endif
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245 }