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annotate Modules/resource.c @ 27998:e27f58a50737 legacy-trunk

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SF bug #690377: Dud footnote reference in distutils docs
author Raymond Hettinger <python@rcn.com>
date Fri, 21 Feb 2003 02:47:09 +0000
parents 0fdfccdfec06
children 871da703e4c0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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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 PyDoc_STRVAR(struct_rusage__doc__,
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21 "struct_rusage: Result from getrusage.\n\n"
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22 "This object may be accessed either as a tuple of\n"
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23 " (utime,stime,maxrss,ixrss,idrss,isrss,minflt,majflt,\n"
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24 " nswap,inblock,oublock,msgsnd,msgrcv,nsignals,nvcsw,nivcsw)\n"
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25 "or via the attributes ru_utime, ru_stime, ru_maxrss, and so on.");
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26
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27 static PyStructSequence_Field struct_rusage_fields[] = {
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28 {"ru_utime", "user time used"},
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29 {"ru_stime", "system time used"},
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30 {"ru_maxrss", "max. resident set size"},
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31 {"ru_ixrss", "shared memory size"},
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32 {"ru_idrss", "unshared data size"},
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33 {"ru_isrss", "unshared stack size"},
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34 {"ru_minflt", "page faults not requiring I/O"},
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35 {"ru_majflt", "page faults requiring I/O"},
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36 {"ru_nswap", "number of swap outs"},
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37 {"ru_inblock", "block input operations"},
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38 {"ru_oublock", "block output operations"},
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39 {"ru_msgsnd", "IPC messages sent"},
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40 {"ru_msgrcv", "IPC messages received"},
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41 {"ru_nsignals", "signals received"},
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42 {"ru_nvcsw", "voluntary context switches"},
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43 {"ru_nivcsw", "involuntary context switches"},
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44 {0}
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45 };
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46
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47 static PyStructSequence_Desc struct_rusage_desc = {
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48 "resource.struct_rusage", /* name */
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49 struct_rusage__doc__, /* doc */
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50 struct_rusage_fields, /* fields */
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51 16 /* n_in_sequence */
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52 };
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53
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54 static PyTypeObject StructRUsageType;
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55
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56 static PyObject *
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57 resource_getrusage(PyObject *self, PyObject *args)
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58 {
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59 int who;
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60 struct rusage ru;
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61 PyObject *result;
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62
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63 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
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64 return NULL;
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65
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66 if (getrusage(who, &ru) == -1) {
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67 if (errno == EINVAL) {
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68 PyErr_SetString(PyExc_ValueError,
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69 "invalid who parameter");
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70 return NULL;
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71 }
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72 PyErr_SetFromErrno(ResourceError);
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73 return NULL;
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74 }
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75
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76 result = PyStructSequence_New(&StructRUsageType);
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77 if (!result)
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78 return NULL;
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79
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80 PyStructSequence_SET_ITEM(result, 0,
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81 PyFloat_FromDouble(doubletime(ru.ru_utime)));
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82 PyStructSequence_SET_ITEM(result, 1,
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83 PyFloat_FromDouble(doubletime(ru.ru_stime)));
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84 PyStructSequence_SET_ITEM(result, 2, PyInt_FromLong(ru.ru_maxrss));
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85 PyStructSequence_SET_ITEM(result, 3, PyInt_FromLong(ru.ru_ixrss));
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86 PyStructSequence_SET_ITEM(result, 4, PyInt_FromLong(ru.ru_idrss));
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87 PyStructSequence_SET_ITEM(result, 5, PyInt_FromLong(ru.ru_isrss));
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88 PyStructSequence_SET_ITEM(result, 6, PyInt_FromLong(ru.ru_minflt));
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89 PyStructSequence_SET_ITEM(result, 7, PyInt_FromLong(ru.ru_majflt));
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90 PyStructSequence_SET_ITEM(result, 8, PyInt_FromLong(ru.ru_nswap));
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91 PyStructSequence_SET_ITEM(result, 9, PyInt_FromLong(ru.ru_inblock));
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92 PyStructSequence_SET_ITEM(result, 10, PyInt_FromLong(ru.ru_oublock));
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93 PyStructSequence_SET_ITEM(result, 11, PyInt_FromLong(ru.ru_msgsnd));
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94 PyStructSequence_SET_ITEM(result, 12, PyInt_FromLong(ru.ru_msgrcv));
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95 PyStructSequence_SET_ITEM(result, 13, PyInt_FromLong(ru.ru_nsignals));
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96 PyStructSequence_SET_ITEM(result, 14, PyInt_FromLong(ru.ru_nvcsw));
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97 PyStructSequence_SET_ITEM(result, 15, PyInt_FromLong(ru.ru_nivcsw));
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98
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99 if (PyErr_Occurred()) {
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100 Py_DECREF(result);
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101 return NULL;
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102 }
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103
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104 return result;
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105 }
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106
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107
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108 static PyObject *
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109 resource_getrlimit(PyObject *self, PyObject *args)
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110 {
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111 struct rlimit rl;
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112 int resource;
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113
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114 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
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115 return NULL;
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116
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117 if (resource < 0 || resource >= RLIM_NLIMITS) {
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118 PyErr_SetString(PyExc_ValueError,
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119 "invalid resource specified");
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120 return NULL;
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121 }
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122
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123 if (getrlimit(resource, &rl) == -1) {
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124 PyErr_SetFromErrno(ResourceError);
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125 return NULL;
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126 }
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127
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128 #if defined(HAVE_LONG_LONG)
1beaf9179125 Changes for long file support by Steve Clift.
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parents: 6798
diff changeset
129 if (sizeof(rl.rlim_cur) > sizeof(long)) {
1beaf9179125 Changes for long file support by Steve Clift.
Guido van Rossum <guido@python.org>
parents: 6798
diff changeset
130 return Py_BuildValue("LL",
1beaf9179125 Changes for long file support by Steve Clift.
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parents: 6798
diff changeset
131 (LONG_LONG) rl.rlim_cur,
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parents: 6798
diff changeset
132 (LONG_LONG) rl.rlim_max);
1beaf9179125 Changes for long file support by Steve Clift.
Guido van Rossum <guido@python.org>
parents: 6798
diff changeset
133 }
1beaf9179125 Changes for long file support by Steve Clift.
Guido van Rossum <guido@python.org>
parents: 6798
diff changeset
134 #endif
25992
0fdfccdfec06 Fix SF #632624, test_resource failure on alpha/64bit
Neal Norwitz <nnorwitz@gmail.com>
parents: 24471
diff changeset
135 return Py_BuildValue("ll", (long) rl.rlim_cur, (long) rl.rlim_max);
4770
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parents:
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136 }
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parents:
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137
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parents:
diff changeset
138 static PyObject *
13501
ca32ff7a067e ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 13256
diff changeset
139 resource_setrlimit(PyObject *self, PyObject *args)
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parents:
diff changeset
140 {
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parents:
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141 struct rlimit rl;
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parents:
diff changeset
142 int resource;
9787
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diff changeset
143 PyObject *curobj, *maxobj;
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144
23250
284cfca74df4 Check for overflow errors in setrlimit(),
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parents: 22899
diff changeset
145 if (!PyArg_ParseTuple(args, "i(OO):setrlimit",
284cfca74df4 Check for overflow errors in setrlimit(),
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 22899
diff changeset
146 &resource, &curobj, &maxobj))
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147 return NULL;
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148
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parents:
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149 if (resource < 0 || resource >= RLIM_NLIMITS) {
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diff changeset
150 PyErr_SetString(PyExc_ValueError,
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Guido van Rossum <guido@python.org>
parents:
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151 "invalid resource specified");
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152 return NULL;
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153 }
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154
9787
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diff changeset
155 #if !defined(HAVE_LARGEFILE_SUPPORT)
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parents: 6798
diff changeset
156 rl.rlim_cur = PyInt_AsLong(curobj);
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parents: 22899
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157 if (rl.rlim_cur == -1 && PyErr_Occurred())
284cfca74df4 Check for overflow errors in setrlimit(),
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 22899
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158 return NULL;
9787
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diff changeset
159 rl.rlim_max = PyInt_AsLong(maxobj);
23250
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parents: 22899
diff changeset
160 if (rl.rlim_max == -1 && PyErr_Occurred())
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 22899
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161 return NULL;
9787
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parents: 6798
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162 #else
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diff changeset
163 /* The limits are probably bigger than a long */
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parents: 6798
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164 rl.rlim_cur = PyLong_Check(curobj) ?
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parents: 6798
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165 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
23250
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parents: 22899
diff changeset
166 if (rl.rlim_cur == -1 && PyErr_Occurred())
284cfca74df4 Check for overflow errors in setrlimit(),
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 22899
diff changeset
167 return NULL;
9787
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parents: 6798
diff changeset
168 rl.rlim_max = PyLong_Check(maxobj) ?
1beaf9179125 Changes for long file support by Steve Clift.
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parents: 6798
diff changeset
169 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
23250
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parents: 22899
diff changeset
170 if (rl.rlim_max == -1 && PyErr_Occurred())
284cfca74df4 Check for overflow errors in setrlimit(),
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 22899
diff changeset
171 return NULL;
9787
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parents: 6798
diff changeset
172 #endif
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173
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174 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
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parents:
diff changeset
175 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
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Guido van Rossum <guido@python.org>
parents:
diff changeset
176 if (setrlimit(resource, &rl) == -1) {
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
177 if (errno == EINVAL)
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parents:
diff changeset
178 PyErr_SetString(PyExc_ValueError,
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Guido van Rossum <guido@python.org>
parents:
diff changeset
179 "current limit exceeds maximum limit");
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Guido van Rossum <guido@python.org>
parents:
diff changeset
180 else if (errno == EPERM)
72108faa56bf Added Jeremy's resource module.
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parents:
diff changeset
181 PyErr_SetString(PyExc_ValueError,
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Guido van Rossum <guido@python.org>
parents:
diff changeset
182 "not allowed to raise maximum limit");
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parents:
diff changeset
183 else
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parents:
diff changeset
184 PyErr_SetFromErrno(ResourceError);
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diff changeset
185 return NULL;
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parents:
diff changeset
186 }
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diff changeset
187 Py_INCREF(Py_None);
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diff changeset
188 return Py_None;
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189 }
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190
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parents:
diff changeset
191 static PyObject *
13501
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Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 13256
diff changeset
192 resource_getpagesize(PyObject *self, PyObject *args)
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parents:
diff changeset
193 {
11882
dc65c5f6ad7c Massive patch by Skip Montanaro to add ":name" to as many
Guido van Rossum <guido@python.org>
parents: 9787
diff changeset
194 if (!PyArg_ParseTuple(args, ":getpagesize"))
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195 return NULL;
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diff changeset
196 return Py_BuildValue("i", getpagesize());
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197 }
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198
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199 /* List of functions */
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200
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parents:
diff changeset
201 static struct PyMethodDef
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parents:
diff changeset
202 resource_methods[] = {
21757
40631ae74b17 Patch #477750: Use METH_ constants in Modules.
Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
203 {"getrusage", resource_getrusage, METH_VARARGS},
40631ae74b17 Patch #477750: Use METH_ constants in Modules.
Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
204 {"getrlimit", resource_getrlimit, METH_VARARGS},
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Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
205 {"setrlimit", resource_setrlimit, METH_VARARGS},
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Martin v. Löwis <martin@v.loewis.de>
parents: 21712
diff changeset
206 {"getpagesize", resource_getpagesize, METH_VARARGS},
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diff changeset
207 {NULL, NULL} /* sentinel */
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diff changeset
208 };
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209
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diff changeset
210
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diff changeset
211 /* Module initialization */
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diff changeset
212
24471
f66b3a3509c7 Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
Mark Hammond <mhammond@skippinet.com.au>
parents: 23832
diff changeset
213 PyMODINIT_FUNC
19935
619a2d6b5ea9 [Patch #462255, from Jason Tishler] Re-enables building the resouce
Andrew M. Kuchling <amk@amk.ca>
parents: 14375
diff changeset
214 initresource(void)
4770
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parents:
diff changeset
215 {
22502
5b8be8611d8c Expose RLIM_INFINITY constant. Closes SF patch 489066.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 21943
diff changeset
216 PyObject *m, *v;
4770
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217
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diff changeset
218 /* Create the module and add the functions */
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parents:
diff changeset
219 m = Py_InitModule("resource", resource_methods);
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diff changeset
220
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Guido van Rossum <guido@python.org>
parents:
diff changeset
221 /* Add some symbolic constants to the module */
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
Fred Drake <fdrake@acm.org>
parents: 21757
diff changeset
222 if (ResourceError == NULL) {
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
Fred Drake <fdrake@acm.org>
parents: 21757
diff changeset
223 ResourceError = PyErr_NewException("resource.error",
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
224 NULL, NULL);
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
Fred Drake <fdrake@acm.org>
parents: 21757
diff changeset
225 }
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
Fred Drake <fdrake@acm.org>
parents: 21757
diff changeset
226 Py_INCREF(ResourceError);
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
Fred Drake <fdrake@acm.org>
parents: 21757
diff changeset
227 PyModule_AddObject(m, "error", ResourceError);
22899
c0d7b5788cbe Patch #512005: getrusage() returns struct-like object.
Martin v. Löwis <martin@v.loewis.de>
parents: 22502
diff changeset
228 PyStructSequence_InitType(&StructRUsageType, &struct_rusage_desc);
c0d7b5788cbe Patch #512005: getrusage() returns struct-like object.
Martin v. Löwis <martin@v.loewis.de>
parents: 22502
diff changeset
229 PyModule_AddObject(m, "struct_rusage",
c0d7b5788cbe Patch #512005: getrusage() returns struct-like object.
Martin v. Löwis <martin@v.loewis.de>
parents: 22502
diff changeset
230 (PyObject*) &StructRUsageType);
4770
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parents:
diff changeset
231
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
232 /* insert constants */
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
233 #ifdef RLIMIT_CPU
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
234 PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU);
4770
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parents:
diff changeset
235 #endif
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parents:
diff changeset
236
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
237 #ifdef RLIMIT_FSIZE
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
238 PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE);
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parents:
diff changeset
239 #endif
72108faa56bf Added Jeremy's resource module.
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parents:
diff changeset
240
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
241 #ifdef RLIMIT_DATA
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
242 PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA);
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parents:
diff changeset
243 #endif
72108faa56bf Added Jeremy's resource module.
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parents:
diff changeset
244
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
245 #ifdef RLIMIT_STACK
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
246 PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK);
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parents:
diff changeset
247 #endif
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parents:
diff changeset
248
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
249 #ifdef RLIMIT_CORE
21943
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parents: 21757
diff changeset
250 PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE);
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parents:
diff changeset
251 #endif
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parents:
diff changeset
252
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
253 #ifdef RLIMIT_NOFILE
21943
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parents: 21757
diff changeset
254 PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE);
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parents:
diff changeset
255 #endif
72108faa56bf Added Jeremy's resource module.
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parents:
diff changeset
256
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
257 #ifdef RLIMIT_OFILE
21943
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parents: 21757
diff changeset
258 PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE);
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parents:
diff changeset
259 #endif
72108faa56bf Added Jeremy's resource module.
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parents:
diff changeset
260
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
261 #ifdef RLIMIT_VMEM
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
262 PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM);
4770
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Guido van Rossum <guido@python.org>
parents:
diff changeset
263 #endif
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Guido van Rossum <guido@python.org>
parents:
diff changeset
264
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
265 #ifdef RLIMIT_AS
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
266 PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS);
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parents:
diff changeset
267 #endif
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parents:
diff changeset
268
72108faa56bf Added Jeremy's resource module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
269 #ifdef RLIMIT_RSS
21943
9c8323abf1db Use PyModule_AddIntConstant() instead of creating a private helper function.
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parents: 21757
diff changeset
270 PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS);
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parents:
diff changeset
271 #endif
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parents:
diff changeset
272
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Guido van Rossum <guido@python.org>
parents:
diff changeset
273 #ifdef RLIMIT_NPROC
21943
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parents: 21757
diff changeset
274 PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC);
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parents:
diff changeset
275 #endif
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diff changeset
276
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277 #ifdef RLIMIT_MEMLOCK
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278 PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
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279 #endif
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280
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281 #ifdef RUSAGE_SELF
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282 PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF);
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283 #endif
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284
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285 #ifdef RUSAGE_CHILDREN
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286 PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
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287 #endif
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288
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289 #ifdef RUSAGE_BOTH
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290 PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH);
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291 #endif
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292
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293 #if defined(HAVE_LONG_LONG)
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294 if (sizeof(RLIM_INFINITY) > sizeof(long)) {
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295 v = PyLong_FromLongLong((LONG_LONG) RLIM_INFINITY);
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296 } else
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297 #endif
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298 {
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299 v = PyInt_FromLong((long) RLIM_INFINITY);
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300 }
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301 if (v) {
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302 PyModule_AddObject(m, "RLIM_INFINITY", v);
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303 }
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304 }