source: python/vendor/Python-2.7.6/Modules/resource.c

Last change on this file was 388, checked in by dmik, 11 years ago

python: Update vendor to 2.7.6.
  • Property svn:eol-style set to native
File size: 10.0 KB
Line 
1
2#include "Python.h"
3#include "structseq.h"
4#include <sys/resource.h>
5#include <sys/time.h>
6#include <string.h>
7#include <errno.h>
8/* for sysconf */
9#if defined(HAVE_UNISTD_H)
10#include <unistd.h>
11#endif
12
13/* On some systems, these aren't in any header file.
14 On others they are, with inconsistent prototypes.
15 We declare the (default) return type, to shut up gcc -Wall;
16 but we can't declare the prototype, to avoid errors
17 when the header files declare it different.
18 Worse, on some Linuxes, getpagesize() returns a size_t... */
19
20#define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
21
22static PyObject *ResourceError;
23
24PyDoc_STRVAR(struct_rusage__doc__,
25"struct_rusage: Result from getrusage.\n\n"
26"This object may be accessed either as a tuple of\n"
27" (utime,stime,maxrss,ixrss,idrss,isrss,minflt,majflt,\n"
28" nswap,inblock,oublock,msgsnd,msgrcv,nsignals,nvcsw,nivcsw)\n"
29"or via the attributes ru_utime, ru_stime, ru_maxrss, and so on.");
30
31static PyStructSequence_Field struct_rusage_fields[] = {
32 {"ru_utime", "user time used"},
33 {"ru_stime", "system time used"},
34 {"ru_maxrss", "max. resident set size"},
35 {"ru_ixrss", "shared memory size"},
36 {"ru_idrss", "unshared data size"},
37 {"ru_isrss", "unshared stack size"},
38 {"ru_minflt", "page faults not requiring I/O"},
39 {"ru_majflt", "page faults requiring I/O"},
40 {"ru_nswap", "number of swap outs"},
41 {"ru_inblock", "block input operations"},
42 {"ru_oublock", "block output operations"},
43 {"ru_msgsnd", "IPC messages sent"},
44 {"ru_msgrcv", "IPC messages received"},
45 {"ru_nsignals", "signals received"},
46 {"ru_nvcsw", "voluntary context switches"},
47 {"ru_nivcsw", "involuntary context switches"},
48 {0}
49};
50
51static PyStructSequence_Desc struct_rusage_desc = {
52 "resource.struct_rusage", /* name */
53 struct_rusage__doc__, /* doc */
54 struct_rusage_fields, /* fields */
55 16 /* n_in_sequence */
56};
57
58static int initialized;
59static PyTypeObject StructRUsageType;
60
61static PyObject *
62resource_getrusage(PyObject *self, PyObject *args)
63{
64 int who;
65 struct rusage ru;
66 PyObject *result;
67
68 if (!PyArg_ParseTuple(args, "i:getrusage", &who))
69 return NULL;
70
71 if (getrusage(who, &ru) == -1) {
72 if (errno == EINVAL) {
73 PyErr_SetString(PyExc_ValueError,
74 "invalid who parameter");
75 return NULL;
76 }
77 PyErr_SetFromErrno(ResourceError);
78 return NULL;
79 }
80
81 result = PyStructSequence_New(&StructRUsageType);
82 if (!result)
83 return NULL;
84
85 PyStructSequence_SET_ITEM(result, 0,
86 PyFloat_FromDouble(doubletime(ru.ru_utime)));
87 PyStructSequence_SET_ITEM(result, 1,
88 PyFloat_FromDouble(doubletime(ru.ru_stime)));
89 PyStructSequence_SET_ITEM(result, 2, PyInt_FromLong(ru.ru_maxrss));
90 PyStructSequence_SET_ITEM(result, 3, PyInt_FromLong(ru.ru_ixrss));
91 PyStructSequence_SET_ITEM(result, 4, PyInt_FromLong(ru.ru_idrss));
92 PyStructSequence_SET_ITEM(result, 5, PyInt_FromLong(ru.ru_isrss));
93 PyStructSequence_SET_ITEM(result, 6, PyInt_FromLong(ru.ru_minflt));
94 PyStructSequence_SET_ITEM(result, 7, PyInt_FromLong(ru.ru_majflt));
95 PyStructSequence_SET_ITEM(result, 8, PyInt_FromLong(ru.ru_nswap));
96 PyStructSequence_SET_ITEM(result, 9, PyInt_FromLong(ru.ru_inblock));
97 PyStructSequence_SET_ITEM(result, 10, PyInt_FromLong(ru.ru_oublock));
98 PyStructSequence_SET_ITEM(result, 11, PyInt_FromLong(ru.ru_msgsnd));
99 PyStructSequence_SET_ITEM(result, 12, PyInt_FromLong(ru.ru_msgrcv));
100 PyStructSequence_SET_ITEM(result, 13, PyInt_FromLong(ru.ru_nsignals));
101 PyStructSequence_SET_ITEM(result, 14, PyInt_FromLong(ru.ru_nvcsw));
102 PyStructSequence_SET_ITEM(result, 15, PyInt_FromLong(ru.ru_nivcsw));
103
104 if (PyErr_Occurred()) {
105 Py_DECREF(result);
106 return NULL;
107 }
108
109 return result;
110}
111
112
113static PyObject *
114resource_getrlimit(PyObject *self, PyObject *args)
115{
116 struct rlimit rl;
117 int resource;
118
119 if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
120 return NULL;
121
122 if (resource < 0 || resource >= RLIM_NLIMITS) {
123 PyErr_SetString(PyExc_ValueError,
124 "invalid resource specified");
125 return NULL;
126 }
127
128 if (getrlimit(resource, &rl) == -1) {
129 PyErr_SetFromErrno(ResourceError);
130 return NULL;
131 }
132
133#if defined(HAVE_LONG_LONG)
134 if (sizeof(rl.rlim_cur) > sizeof(long)) {
135 return Py_BuildValue("LL",
136 (PY_LONG_LONG) rl.rlim_cur,
137 (PY_LONG_LONG) rl.rlim_max);
138 }
139#endif
140 return Py_BuildValue("ll", (long) rl.rlim_cur, (long) rl.rlim_max);
141}
142
143static PyObject *
144resource_setrlimit(PyObject *self, PyObject *args)
145{
146 struct rlimit rl;
147 int resource;
148 PyObject *limits, *curobj, *maxobj;
149
150 if (!PyArg_ParseTuple(args, "iO:setrlimit", &resource, &limits))
151 return NULL;
152
153 if (resource < 0 || resource >= RLIM_NLIMITS) {
154 PyErr_SetString(PyExc_ValueError,
155 "invalid resource specified");
156 return NULL;
157 }
158
159 limits = PySequence_Tuple(limits);
160 if (!limits)
161 /* Here limits is a borrowed reference */
162 return NULL;
163
164 if (PyTuple_GET_SIZE(limits) != 2) {
165 PyErr_SetString(PyExc_ValueError,
166 "expected a tuple of 2 integers");
167 goto error;
168 }
169 curobj = PyTuple_GET_ITEM(limits, 0);
170 maxobj = PyTuple_GET_ITEM(limits, 1);
171
172#if !defined(HAVE_LARGEFILE_SUPPORT)
173 rl.rlim_cur = PyInt_AsLong(curobj);
174 if (rl.rlim_cur == (rlim_t)-1 && PyErr_Occurred())
175 goto error;
176 rl.rlim_max = PyInt_AsLong(maxobj);
177 if (rl.rlim_max == (rlim_t)-1 && PyErr_Occurred())
178 goto error;
179#else
180 /* The limits are probably bigger than a long */
181 rl.rlim_cur = PyLong_Check(curobj) ?
182 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
183 if (rl.rlim_cur == (rlim_t)-1 && PyErr_Occurred())
184 goto error;
185 rl.rlim_max = PyLong_Check(maxobj) ?
186 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
187 if (rl.rlim_max == (rlim_t)-1 && PyErr_Occurred())
188 goto error;
189#endif
190
191 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
192 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
193 if (setrlimit(resource, &rl) == -1) {
194 if (errno == EINVAL)
195 PyErr_SetString(PyExc_ValueError,
196 "current limit exceeds maximum limit");
197 else if (errno == EPERM)
198 PyErr_SetString(PyExc_ValueError,
199 "not allowed to raise maximum limit");
200 else
201 PyErr_SetFromErrno(ResourceError);
202 goto error;
203 }
204 Py_DECREF(limits);
205 Py_INCREF(Py_None);
206 return Py_None;
207
208 error:
209 Py_DECREF(limits);
210 return NULL;
211}
212
213static PyObject *
214resource_getpagesize(PyObject *self, PyObject *unused)
215{
216 long pagesize = 0;
217#if defined(HAVE_GETPAGESIZE)
218 pagesize = getpagesize();
219#elif defined(HAVE_SYSCONF)
220#if defined(_SC_PAGE_SIZE)
221 pagesize = sysconf(_SC_PAGE_SIZE);
222#else
223 /* Irix 5.3 has _SC_PAGESIZE, but not _SC_PAGE_SIZE */
224 pagesize = sysconf(_SC_PAGESIZE);
225#endif
226#endif
227 return Py_BuildValue("i", pagesize);
228
229}
230
231/* List of functions */
232
233static struct PyMethodDef
234resource_methods[] = {
235 {"getrusage", resource_getrusage, METH_VARARGS},
236 {"getrlimit", resource_getrlimit, METH_VARARGS},
237 {"setrlimit", resource_setrlimit, METH_VARARGS},
238 {"getpagesize", resource_getpagesize, METH_NOARGS},
239 {NULL, NULL} /* sentinel */
240};
241
242
243/* Module initialization */
244
245PyMODINIT_FUNC
246initresource(void)
247{
248 PyObject *m, *v;
249
250 /* Create the module and add the functions */
251 m = Py_InitModule("resource", resource_methods);
252 if (m == NULL)
253 return;
254
255 /* Add some symbolic constants to the module */
256 if (ResourceError == NULL) {
257 ResourceError = PyErr_NewException("resource.error",
258 NULL, NULL);
259 }
260 Py_INCREF(ResourceError);
261 PyModule_AddObject(m, "error", ResourceError);
262 if (!initialized)
263 PyStructSequence_InitType(&StructRUsageType,
264 &struct_rusage_desc);
265 Py_INCREF(&StructRUsageType);
266 PyModule_AddObject(m, "struct_rusage",
267 (PyObject*) &StructRUsageType);
268
269 /* insert constants */
270#ifdef RLIMIT_CPU
271 PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU);
272#endif
273
274#ifdef RLIMIT_FSIZE
275 PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE);
276#endif
277
278#ifdef RLIMIT_DATA
279 PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA);
280#endif
281
282#ifdef RLIMIT_STACK
283 PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK);
284#endif
285
286#ifdef RLIMIT_CORE
287 PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE);
288#endif
289
290#ifdef RLIMIT_NOFILE
291 PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE);
292#endif
293
294#ifdef RLIMIT_OFILE
295 PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE);
296#endif
297
298#ifdef RLIMIT_VMEM
299 PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM);
300#endif
301
302#ifdef RLIMIT_AS
303 PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS);
304#endif
305
306#ifdef RLIMIT_RSS
307 PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS);
308#endif
309
310#ifdef RLIMIT_NPROC
311 PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC);
312#endif
313
314#ifdef RLIMIT_MEMLOCK
315 PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
316#endif
317
318#ifdef RLIMIT_SBSIZE
319 PyModule_AddIntConstant(m, "RLIMIT_SBSIZE", RLIMIT_SBSIZE);
320#endif
321
322#ifdef RUSAGE_SELF
323 PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF);
324#endif
325
326#ifdef RUSAGE_CHILDREN
327 PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
328#endif
329
330#ifdef RUSAGE_BOTH
331 PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH);
332#endif
333
334#if defined(HAVE_LONG_LONG)
335 if (sizeof(RLIM_INFINITY) > sizeof(long)) {
336 v = PyLong_FromLongLong((PY_LONG_LONG) RLIM_INFINITY);
337 } else
338#endif
339 {
340 v = PyInt_FromLong((long) RLIM_INFINITY);
341 }
342 if (v) {
343 PyModule_AddObject(m, "RLIM_INFINITY", v);
344 }
345 initialized = 1;
346}
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