source: vendor/python/2.5/Modules/resource.c

Last change on this file was 3225, checked in by bird, 18 years ago

Python 2.5
File size: 8.5 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 *curobj, *maxobj;
149
150 if (!PyArg_ParseTuple(args, "i(OO):setrlimit",
151 &resource, &curobj, &maxobj))
152 return NULL;
153
154 if (resource < 0 || resource >= RLIM_NLIMITS) {
155 PyErr_SetString(PyExc_ValueError,
156 "invalid resource specified");
157 return NULL;
158 }
159
160#if !defined(HAVE_LARGEFILE_SUPPORT)
161 rl.rlim_cur = PyInt_AsLong(curobj);
162 if (rl.rlim_cur == -1 && PyErr_Occurred())
163 return NULL;
164 rl.rlim_max = PyInt_AsLong(maxobj);
165 if (rl.rlim_max == -1 && PyErr_Occurred())
166 return NULL;
167#else
168 /* The limits are probably bigger than a long */
169 rl.rlim_cur = PyLong_Check(curobj) ?
170 PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
171 if (rl.rlim_cur == -1 && PyErr_Occurred())
172 return NULL;
173 rl.rlim_max = PyLong_Check(maxobj) ?
174 PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
175 if (rl.rlim_max == -1 && PyErr_Occurred())
176 return NULL;
177#endif
178
179 rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
180 rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
181 if (setrlimit(resource, &rl) == -1) {
182 if (errno == EINVAL)
183 PyErr_SetString(PyExc_ValueError,
184 "current limit exceeds maximum limit");
185 else if (errno == EPERM)
186 PyErr_SetString(PyExc_ValueError,
187 "not allowed to raise maximum limit");
188 else
189 PyErr_SetFromErrno(ResourceError);
190 return NULL;
191 }
192 Py_INCREF(Py_None);
193 return Py_None;
194}
195
196static PyObject *
197resource_getpagesize(PyObject *self, PyObject *unused)
198{
199 long pagesize = 0;
200#if defined(HAVE_GETPAGESIZE)
201 pagesize = getpagesize();
202#elif defined(HAVE_SYSCONF)
203#if defined(_SC_PAGE_SIZE)
204 pagesize = sysconf(_SC_PAGE_SIZE);
205#else
206 /* Irix 5.3 has _SC_PAGESIZE, but not _SC_PAGE_SIZE */
207 pagesize = sysconf(_SC_PAGESIZE);
208#endif
209#endif
210 return Py_BuildValue("i", pagesize);
211
212}
213
214/* List of functions */
215
216static struct PyMethodDef
217resource_methods[] = {
218 {"getrusage", resource_getrusage, METH_VARARGS},
219 {"getrlimit", resource_getrlimit, METH_VARARGS},
220 {"setrlimit", resource_setrlimit, METH_VARARGS},
221 {"getpagesize", resource_getpagesize, METH_NOARGS},
222 {NULL, NULL} /* sentinel */
223};
224
225
226/* Module initialization */
227
228PyMODINIT_FUNC
229initresource(void)
230{
231 PyObject *m, *v;
232
233 /* Create the module and add the functions */
234 m = Py_InitModule("resource", resource_methods);
235 if (m == NULL)
236 return;
237
238 /* Add some symbolic constants to the module */
239 if (ResourceError == NULL) {
240 ResourceError = PyErr_NewException("resource.error",
241 NULL, NULL);
242 }
243 Py_INCREF(ResourceError);
244 PyModule_AddObject(m, "error", ResourceError);
245 if (!initialized)
246 PyStructSequence_InitType(&StructRUsageType,
247 &struct_rusage_desc);
248 Py_INCREF(&StructRUsageType);
249 PyModule_AddObject(m, "struct_rusage",
250 (PyObject*) &StructRUsageType);
251
252 /* insert constants */
253#ifdef RLIMIT_CPU
254 PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU);
255#endif
256
257#ifdef RLIMIT_FSIZE
258 PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE);
259#endif
260
261#ifdef RLIMIT_DATA
262 PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA);
263#endif
264
265#ifdef RLIMIT_STACK
266 PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK);
267#endif
268
269#ifdef RLIMIT_CORE
270 PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE);
271#endif
272
273#ifdef RLIMIT_NOFILE
274 PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE);
275#endif
276
277#ifdef RLIMIT_OFILE
278 PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE);
279#endif
280
281#ifdef RLIMIT_VMEM
282 PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM);
283#endif
284
285#ifdef RLIMIT_AS
286 PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS);
287#endif
288
289#ifdef RLIMIT_RSS
290 PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS);
291#endif
292
293#ifdef RLIMIT_NPROC
294 PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC);
295#endif
296
297#ifdef RLIMIT_MEMLOCK
298 PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
299#endif
300
301#ifdef RUSAGE_SELF
302 PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF);
303#endif
304
305#ifdef RUSAGE_CHILDREN
306 PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
307#endif
308
309#ifdef RUSAGE_BOTH
310 PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH);
311#endif
312
313#if defined(HAVE_LONG_LONG)
314 if (sizeof(RLIM_INFINITY) > sizeof(long)) {
315 v = PyLong_FromLongLong((PY_LONG_LONG) RLIM_INFINITY);
316 } else
317#endif
318 {
319 v = PyInt_FromLong((long) RLIM_INFINITY);
320 }
321 if (v) {
322 PyModule_AddObject(m, "RLIM_INFINITY", v);
323 }
324 initialized = 1;
325}
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