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-
- #include "Python.h"
- #include <sys/resource.h>
- #include <sys/time.h>
- #include <unistd.h>
- #include <string.h>
- #include <errno.h>
-
- /* On some systems, these aren't in any header file.
- On others they are, with inconsistent prototypes.
- We declare the (default) return type, to shut up gcc -Wall;
- but we can't declare the prototype, to avoid errors
- when the header files declare it different.
- Worse, on some Linuxes, getpagesize() returns a size_t... */
-
- #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
-
- static PyObject *ResourceError;
-
- static PyObject *
- resource_getrusage(PyObject *self, PyObject *args)
- {
- int who;
- struct rusage ru;
-
- if (!PyArg_ParseTuple(args, "i:getrusage", &who))
- return NULL;
-
- if (getrusage(who, &ru) == -1) {
- if (errno == EINVAL) {
- PyErr_SetString(PyExc_ValueError,
- "invalid who parameter");
- return NULL;
- }
- PyErr_SetFromErrno(ResourceError);
- return NULL;
- }
-
- /* Yeah, this 16-tuple is way ugly. It's probably a lot less
- ugly than a dictionary with keys (or object attributes)
- named things like 'ixrss'.
- */
- return Py_BuildValue(
- "ddiiiiiiiiiiiiii",
- doubletime(ru.ru_utime), /* user time used */
- doubletime(ru.ru_stime), /* system time used */
- ru.ru_maxrss, /* max. resident set size */
- ru.ru_ixrss, /* shared memory size */
- ru.ru_idrss, /* unshared memory size */
- ru.ru_isrss, /* unshared stack size */
- ru.ru_minflt, /* page faults not requiring I/O*/
- ru.ru_majflt, /* page faults requiring I/O */
- ru.ru_nswap, /* number of swap outs */
- ru.ru_inblock, /* block input operations */
- ru.ru_oublock, /* block output operations */
- ru.ru_msgsnd, /* messages sent */
- ru.ru_msgrcv, /* messages received */
- ru.ru_nsignals, /* signals received */
- ru.ru_nvcsw, /* voluntary context switches */
- ru.ru_nivcsw /* involuntary context switches */
- );
- }
-
-
- static PyObject *
- resource_getrlimit(PyObject *self, PyObject *args)
- {
- struct rlimit rl;
- int resource;
-
- if (!PyArg_ParseTuple(args, "i:getrlimit", &resource))
- return NULL;
-
- if (resource < 0 || resource >= RLIM_NLIMITS) {
- PyErr_SetString(PyExc_ValueError,
- "invalid resource specified");
- return NULL;
- }
-
- if (getrlimit(resource, &rl) == -1) {
- PyErr_SetFromErrno(ResourceError);
- return NULL;
- }
-
- #if defined(HAVE_LONG_LONG)
- if (sizeof(rl.rlim_cur) > sizeof(long)) {
- return Py_BuildValue("LL",
- (LONG_LONG) rl.rlim_cur,
- (LONG_LONG) rl.rlim_max);
- }
- #endif
- return Py_BuildValue("ii", (long) rl.rlim_cur, (long) rl.rlim_max);
- }
-
- static PyObject *
- resource_setrlimit(PyObject *self, PyObject *args)
- {
- struct rlimit rl;
- int resource;
- PyObject *curobj, *maxobj;
-
- if (!PyArg_ParseTuple(args, "i(OO):setrlimit", &resource, &curobj, &maxobj))
- return NULL;
-
- if (resource < 0 || resource >= RLIM_NLIMITS) {
- PyErr_SetString(PyExc_ValueError,
- "invalid resource specified");
- return NULL;
- }
-
- #if !defined(HAVE_LARGEFILE_SUPPORT)
- rl.rlim_cur = PyInt_AsLong(curobj);
- rl.rlim_max = PyInt_AsLong(maxobj);
- #else
- /* The limits are probably bigger than a long */
- rl.rlim_cur = PyLong_Check(curobj) ?
- PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
- rl.rlim_max = PyLong_Check(maxobj) ?
- PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
- #endif
-
- rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
- rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
- if (setrlimit(resource, &rl) == -1) {
- if (errno == EINVAL)
- PyErr_SetString(PyExc_ValueError,
- "current limit exceeds maximum limit");
- else if (errno == EPERM)
- PyErr_SetString(PyExc_ValueError,
- "not allowed to raise maximum limit");
- else
- PyErr_SetFromErrno(ResourceError);
- return NULL;
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static PyObject *
- resource_getpagesize(PyObject *self, PyObject *args)
- {
- if (!PyArg_ParseTuple(args, ":getpagesize"))
- return NULL;
- return Py_BuildValue("i", getpagesize());
- }
-
- /* List of functions */
-
- static struct PyMethodDef
- resource_methods[] = {
- {"getrusage", resource_getrusage, 1},
- {"getrlimit", resource_getrlimit, 1},
- {"setrlimit", resource_setrlimit, 1},
- {"getpagesize", resource_getpagesize, 1},
- {NULL, NULL} /* sentinel */
- };
-
-
- /* Module initialization */
-
- static void
- ins(PyObject *dict, char *name, int value)
- {
- PyObject *v = PyInt_FromLong((long) value);
- if (v) {
- PyDict_SetItemString(dict, name, v);
- Py_DECREF(v);
- }
- /* errors will be checked by initresource() */
- }
-
- void initresource(void)
- {
- PyObject *m, *d;
-
- /* Create the module and add the functions */
- m = Py_InitModule("resource", resource_methods);
-
- /* Add some symbolic constants to the module */
- d = PyModule_GetDict(m);
- ResourceError = PyErr_NewException("resource.error", NULL, NULL);
- PyDict_SetItemString(d, "error", ResourceError);
-
- /* insert constants */
- #ifdef RLIMIT_CPU
- ins(d, "RLIMIT_CPU", RLIMIT_CPU);
- #endif
-
- #ifdef RLIMIT_FSIZE
- ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
- #endif
-
- #ifdef RLIMIT_DATA
- ins(d, "RLIMIT_DATA", RLIMIT_DATA);
- #endif
-
- #ifdef RLIMIT_STACK
- ins(d, "RLIMIT_STACK", RLIMIT_STACK);
- #endif
-
- #ifdef RLIMIT_CORE
- ins(d, "RLIMIT_CORE", RLIMIT_CORE);
- #endif
-
- #ifdef RLIMIT_NOFILE
- ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
- #endif
-
- #ifdef RLIMIT_OFILE
- ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
- #endif
-
- #ifdef RLIMIT_VMEM
- ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
- #endif
-
- #ifdef RLIMIT_AS
- ins(d, "RLIMIT_AS", RLIMIT_AS);
- #endif
-
- #ifdef RLIMIT_RSS
- ins(d, "RLIMIT_RSS", RLIMIT_RSS);
- #endif
-
- #ifdef RLIMIT_NPROC
- ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
- #endif
-
- #ifdef RLIMIT_MEMLOCK
- ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
- #endif
-
- #ifdef RUSAGE_SELF
- ins(d, "RUSAGE_SELF", RUSAGE_SELF);
- #endif
-
- #ifdef RUSAGE_CHILDREN
- ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
- #endif
-
- #ifdef RUSAGE_BOTH
- ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
- #endif
- }
-