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annotate Modules/resource.c @ 58765:2ba7677bfa95 legacy-trunk

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testCopysign was defined twice in test_math; combine the definitions
author Mark Dickinson <dickinsm@gmail.com>
date Sat, 06 Feb 2010 23:11:25 +0000
parents 20869d978b8b
children fd25030223b0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 #include "Python.h"
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3 #include "structseq.h"
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4 #include <sys/resource.h>
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5 #include <sys/time.h>
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6 #include <string.h>
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7 #include <errno.h>
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8 /* for sysconf */
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9 #if defined(HAVE_UNISTD_H)
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10 #include <unistd.h>
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11 #endif
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12
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13 /* On some systems, these aren't in any header file.
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14 On others they are, with inconsistent prototypes.
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15 We declare the (default) return type, to shut up gcc -Wall;
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16 but we can't declare the prototype, to avoid errors
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17 when the header files declare it different.
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18 Worse, on some Linuxes, getpagesize() returns a size_t... */
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19
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20 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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21
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22 static PyObject *ResourceError;
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23
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24 PyDoc_STRVAR(struct_rusage__doc__,
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25 "struct_rusage: Result from getrusage.\n\n"
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26 "This object may be accessed either as a tuple of\n"
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27 " (utime,stime,maxrss,ixrss,idrss,isrss,minflt,majflt,\n"
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28 " nswap,inblock,oublock,msgsnd,msgrcv,nsignals,nvcsw,nivcsw)\n"
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29 "or via the attributes ru_utime, ru_stime, ru_maxrss, and so on.");
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30
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31 static PyStructSequence_Field struct_rusage_fields[] = {
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32 {"ru_utime", "user time used"},
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33 {"ru_stime", "system time used"},
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34 {"ru_maxrss", "max. resident set size"},
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35 {"ru_ixrss", "shared memory size"},
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36 {"ru_idrss", "unshared data size"},
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37 {"ru_isrss", "unshared stack size"},
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38 {"ru_minflt", "page faults not requiring I/O"},
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39 {"ru_majflt", "page faults requiring I/O"},
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40 {"ru_nswap", "number of swap outs"},
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41 {"ru_inblock", "block input operations"},
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42 {"ru_oublock", "block output operations"},
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43 {"ru_msgsnd", "IPC messages sent"},
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44 {"ru_msgrcv", "IPC messages received"},
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45 {"ru_nsignals", "signals received"},
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46 {"ru_nvcsw", "voluntary context switches"},
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47 {"ru_nivcsw", "involuntary context switches"},
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48 {0}
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49 };
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50
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51 static PyStructSequence_Desc struct_rusage_desc = {
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52 "resource.struct_rusage", /* name */
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53 struct_rusage__doc__, /* doc */
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54 struct_rusage_fields, /* fields */
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55 16 /* n_in_sequence */
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56 };
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57
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58 static int initialized;
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59 static PyTypeObject StructRUsageType;
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60
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61 static PyObject *
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62 resource_getrusage(PyObject *self, PyObject *args)
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63 {
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64 int who;
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65 struct rusage ru;
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66 PyObject *result;
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67
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68 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
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69 return NULL;
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70
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71 if (getrusage(who, &ru) == -1) {
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72 if (errno == EINVAL) {
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73 PyErr_SetString(PyExc_ValueError,
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74 "invalid who parameter");
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75 return NULL;
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76 }
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77 PyErr_SetFromErrno(ResourceError);
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78 return NULL;
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79 }
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80
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81 result = PyStructSequence_New(&StructRUsageType);
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82 if (!result)
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83 return NULL;
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84
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85 PyStructSequence_SET_ITEM(result, 0,
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86 PyFloat_FromDouble(doubletime(ru.ru_utime)));
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87 PyStructSequence_SET_ITEM(result, 1,
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88 PyFloat_FromDouble(doubletime(ru.ru_stime)));
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89 PyStructSequence_SET_ITEM(result, 2, PyInt_FromLong(ru.ru_maxrss));
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90 PyStructSequence_SET_ITEM(result, 3, PyInt_FromLong(ru.ru_ixrss));
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91 PyStructSequence_SET_ITEM(result, 4, PyInt_FromLong(ru.ru_idrss));
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92 PyStructSequence_SET_ITEM(result, 5, PyInt_FromLong(ru.ru_isrss));
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93 PyStructSequence_SET_ITEM(result, 6, PyInt_FromLong(ru.ru_minflt));
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94 PyStructSequence_SET_ITEM(result, 7, PyInt_FromLong(ru.ru_majflt));
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95 PyStructSequence_SET_ITEM(result, 8, PyInt_FromLong(ru.ru_nswap));
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96 PyStructSequence_SET_ITEM(result, 9, PyInt_FromLong(ru.ru_inblock));
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97 PyStructSequence_SET_ITEM(result, 10, PyInt_FromLong(ru.ru_oublock));
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98 PyStructSequence_SET_ITEM(result, 11, PyInt_FromLong(ru.ru_msgsnd));
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99 PyStructSequence_SET_ITEM(result, 12, PyInt_FromLong(ru.ru_msgrcv));
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100 PyStructSequence_SET_ITEM(result, 13, PyInt_FromLong(ru.ru_nsignals));
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101 PyStructSequence_SET_ITEM(result, 14, PyInt_FromLong(ru.ru_nvcsw));
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102 PyStructSequence_SET_ITEM(result, 15, PyInt_FromLong(ru.ru_nivcsw));
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103
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104 if (PyErr_Occurred()) {
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105 Py_DECREF(result);
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106 return NULL;
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107 }
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108
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109 return result;
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110 }
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111
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112
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113 static PyObject *
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114 resource_getrlimit(PyObject *self, PyObject *args)
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115 {
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116 struct rlimit rl;
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117 int resource;
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118
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119 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
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120 return NULL;
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121
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122 if (resource < 0 || resource >= RLIM_NLIMITS) {
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123 PyErr_SetString(PyExc_ValueError,
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124 "invalid resource specified");
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125 return NULL;
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126 }
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127
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128 if (getrlimit(resource, &rl) == -1) {
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129 PyErr_SetFromErrno(ResourceError);
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130 return NULL;
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131 }
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132
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133 #if defined(HAVE_LONG_LONG)
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134 if (sizeof(rl.rlim_cur) > sizeof(long)) {
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135 return Py_BuildValue("LL",
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136 (PY_LONG_LONG) rl.rlim_cur,
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137 (PY_LONG_LONG) rl.rlim_max);
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138 }
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139 #endif
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140 return Py_BuildValue("ll", (long) rl.rlim_cur, (long) rl.rlim_max);
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141 }
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142
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143 static PyObject *
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144 resource_setrlimit(PyObject *self, PyObject *args)
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145 {
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146 struct rlimit rl;
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147 int resource;
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148 PyObject *curobj, *maxobj;
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149
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150 if (!PyArg_ParseTuple(args, "i(OO):setrlimit",
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151 &resource, &curobj, &maxobj))
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152 return NULL;
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153
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154 if (resource < 0 || resource >= RLIM_NLIMITS) {
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155 PyErr_SetString(PyExc_ValueError,
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156 "invalid resource specified");
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157 return NULL;
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158 }
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159
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160 #if !defined(HAVE_LARGEFILE_SUPPORT)
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161 rl.rlim_cur = PyInt_AsLong(curobj);
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162 if (rl.rlim_cur == (rlim_t)-1 && PyErr_Occurred())
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163 return NULL;
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164 rl.rlim_max = PyInt_AsLong(maxobj);
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165 if (rl.rlim_max == (rlim_t)-1 && PyErr_Occurred())
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166 return NULL;
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167 #else
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168 /* The limits are probably bigger than a long */
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169 rl.rlim_cur = PyLong_Check(curobj) ?
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170 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
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171 if (rl.rlim_cur == (rlim_t)-1 && PyErr_Occurred())
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172 return NULL;
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173 rl.rlim_max = PyLong_Check(maxobj) ?
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174 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
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175 if (rl.rlim_max == (rlim_t)-1 && PyErr_Occurred())
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176 return NULL;
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177 #endif
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178
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179 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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180 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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181 if (setrlimit(resource, &rl) == -1) {
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182 if (errno == EINVAL)
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183 PyErr_SetString(PyExc_ValueError,
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184 "current limit exceeds maximum limit");
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185 else if (errno == EPERM)
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186 PyErr_SetString(PyExc_ValueError,
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187 "not allowed to raise maximum limit");
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188 else
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189 PyErr_SetFromErrno(ResourceError);
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190 return NULL;
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191 }
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192 Py_INCREF(Py_None);
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193 return Py_None;
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194 }
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195
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196 static PyObject *
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197 resource_getpagesize(PyObject *self, PyObject *unused)
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198 {
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199 long pagesize = 0;
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200 #if defined(HAVE_GETPAGESIZE)
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201 pagesize = getpagesize();
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diff changeset
202 #elif defined(HAVE_SYSCONF)
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203 #if defined(_SC_PAGE_SIZE)
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204 pagesize = sysconf(_SC_PAGE_SIZE);
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205 #else
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206 /* Irix 5.3 has _SC_PAGESIZE, but not _SC_PAGE_SIZE */
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207 pagesize = sysconf(_SC_PAGESIZE);
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diff changeset
208 #endif
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209 #endif
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210 return Py_BuildValue("i", pagesize);
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211
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212 }
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213
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214 /* List of functions */
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215
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216 static struct PyMethodDef
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217 resource_methods[] = {
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218 {"getrusage", resource_getrusage, METH_VARARGS},
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219 {"getrlimit", resource_getrlimit, METH_VARARGS},
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220 {"setrlimit", resource_setrlimit, METH_VARARGS},
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221 {"getpagesize", resource_getpagesize, METH_NOARGS},
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222 {NULL, NULL} /* sentinel */
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223 };
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224
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225
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226 /* Module initialization */
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227
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228 PyMODINIT_FUNC
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229 initresource(void)
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230 {
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231 PyObject *m, *v;
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232
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233 /* Create the module and add the functions */
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234 m = Py_InitModule("resource", resource_methods);
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1af7f719ed28 Check return result from Py_InitModule*(). This API can fail.
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235 if (m == NULL)
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diff changeset
236 return;
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237
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238 /* Add some symbolic constants to the module */
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239 if (ResourceError == NULL) {
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240 ResourceError = PyErr_NewException("resource.error",
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diff changeset
241 NULL, NULL);
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diff changeset
242 }
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243 Py_INCREF(ResourceError);
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diff changeset
244 PyModule_AddObject(m, "error", ResourceError);
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diff changeset
245 if (!initialized)
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246 PyStructSequence_InitType(&StructRUsageType,
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247 &struct_rusage_desc);
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diff changeset
248 Py_INCREF(&StructRUsageType);
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249 PyModule_AddObject(m, "struct_rusage",
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250 (PyObject*) &StructRUsageType);
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251
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252 /* insert constants */
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253 #ifdef RLIMIT_CPU
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254 PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU);
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255 #endif
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256
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257 #ifdef RLIMIT_FSIZE
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258 PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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259 #endif
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260
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261 #ifdef RLIMIT_DATA
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262 PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA);
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263 #endif
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264
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265 #ifdef RLIMIT_STACK
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266 PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK);
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267 #endif
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268
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269 #ifdef RLIMIT_CORE
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270 PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE);
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271 #endif
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272
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273 #ifdef RLIMIT_NOFILE
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274 PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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275 #endif
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276
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277 #ifdef RLIMIT_OFILE
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278 PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE);
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279 #endif
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280
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281 #ifdef RLIMIT_VMEM
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282 PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM);
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283 #endif
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284
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285 #ifdef RLIMIT_AS
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286 PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS);
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287 #endif
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288
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289 #ifdef RLIMIT_RSS
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290 PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS);
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291 #endif
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292
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293 #ifdef RLIMIT_NPROC
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294 PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC);
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295 #endif
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296
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297 #ifdef RLIMIT_MEMLOCK
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298 PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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299 #endif
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300
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301 #ifdef RLIMIT_SBSIZE
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302 PyModule_AddIntConstant(m, "RLIMIT_SBSIZE", RLIMIT_SBSIZE);
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303 #endif
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304
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305 #ifdef RUSAGE_SELF
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306 PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF);
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307 #endif
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308
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309 #ifdef RUSAGE_CHILDREN
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310 PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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311 #endif
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312
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313 #ifdef RUSAGE_BOTH
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314 PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH);
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315 #endif
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316
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317 #if defined(HAVE_LONG_LONG)
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318 if (sizeof(RLIM_INFINITY) > sizeof(long)) {
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319 v = PyLong_FromLongLong((PY_LONG_LONG) RLIM_INFINITY);
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320 } else
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321 #endif
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322 {
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323 v = PyInt_FromLong((long) RLIM_INFINITY);
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324 }
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325 if (v) {
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326 PyModule_AddObject(m, "RLIM_INFINITY", v);
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327 }
37772
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328 initialized = 1;
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329 }