ref: 290c921d1d01119b7d4550770da06c491508508f
dir: /sys/src/cmd/python/Modules/resource.c/
#include "Python.h" #include "structseq.h" #include <sys/resource.h> #include <sys/time.h> #include <string.h> #include <errno.h> /* for sysconf */ #if defined(HAVE_UNISTD_H) #include <unistd.h> #endif /* 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; PyDoc_STRVAR(struct_rusage__doc__, "struct_rusage: Result from getrusage.\n\n" "This object may be accessed either as a tuple of\n" " (utime,stime,maxrss,ixrss,idrss,isrss,minflt,majflt,\n" " nswap,inblock,oublock,msgsnd,msgrcv,nsignals,nvcsw,nivcsw)\n" "or via the attributes ru_utime, ru_stime, ru_maxrss, and so on."); static PyStructSequence_Field struct_rusage_fields[] = { {"ru_utime", "user time used"}, {"ru_stime", "system time used"}, {"ru_maxrss", "max. resident set size"}, {"ru_ixrss", "shared memory size"}, {"ru_idrss", "unshared data size"}, {"ru_isrss", "unshared stack size"}, {"ru_minflt", "page faults not requiring I/O"}, {"ru_majflt", "page faults requiring I/O"}, {"ru_nswap", "number of swap outs"}, {"ru_inblock", "block input operations"}, {"ru_oublock", "block output operations"}, {"ru_msgsnd", "IPC messages sent"}, {"ru_msgrcv", "IPC messages received"}, {"ru_nsignals", "signals received"}, {"ru_nvcsw", "voluntary context switches"}, {"ru_nivcsw", "involuntary context switches"}, {0} }; static PyStructSequence_Desc struct_rusage_desc = { "resource.struct_rusage", /* name */ struct_rusage__doc__, /* doc */ struct_rusage_fields, /* fields */ 16 /* n_in_sequence */ }; static int initialized; static PyTypeObject StructRUsageType; static PyObject * resource_getrusage(PyObject *self, PyObject *args) { int who; struct rusage ru; PyObject *result; 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; } result = PyStructSequence_New(&StructRUsageType); if (!result) return NULL; PyStructSequence_SET_ITEM(result, 0, PyFloat_FromDouble(doubletime(ru.ru_utime))); PyStructSequence_SET_ITEM(result, 1, PyFloat_FromDouble(doubletime(ru.ru_stime))); PyStructSequence_SET_ITEM(result, 2, PyInt_FromLong(ru.ru_maxrss)); PyStructSequence_SET_ITEM(result, 3, PyInt_FromLong(ru.ru_ixrss)); PyStructSequence_SET_ITEM(result, 4, PyInt_FromLong(ru.ru_idrss)); PyStructSequence_SET_ITEM(result, 5, PyInt_FromLong(ru.ru_isrss)); PyStructSequence_SET_ITEM(result, 6, PyInt_FromLong(ru.ru_minflt)); PyStructSequence_SET_ITEM(result, 7, PyInt_FromLong(ru.ru_majflt)); PyStructSequence_SET_ITEM(result, 8, PyInt_FromLong(ru.ru_nswap)); PyStructSequence_SET_ITEM(result, 9, PyInt_FromLong(ru.ru_inblock)); PyStructSequence_SET_ITEM(result, 10, PyInt_FromLong(ru.ru_oublock)); PyStructSequence_SET_ITEM(result, 11, PyInt_FromLong(ru.ru_msgsnd)); PyStructSequence_SET_ITEM(result, 12, PyInt_FromLong(ru.ru_msgrcv)); PyStructSequence_SET_ITEM(result, 13, PyInt_FromLong(ru.ru_nsignals)); PyStructSequence_SET_ITEM(result, 14, PyInt_FromLong(ru.ru_nvcsw)); PyStructSequence_SET_ITEM(result, 15, PyInt_FromLong(ru.ru_nivcsw)); if (PyErr_Occurred()) { Py_DECREF(result); return NULL; } return result; } 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", (PY_LONG_LONG) rl.rlim_cur, (PY_LONG_LONG) rl.rlim_max); } #endif return Py_BuildValue("ll", (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); if (rl.rlim_cur == -1 && PyErr_Occurred()) return NULL; rl.rlim_max = PyInt_AsLong(maxobj); if (rl.rlim_max == -1 && PyErr_Occurred()) return NULL; #else /* The limits are probably bigger than a long */ rl.rlim_cur = PyLong_Check(curobj) ? PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj); if (rl.rlim_cur == -1 && PyErr_Occurred()) return NULL; rl.rlim_max = PyLong_Check(maxobj) ? PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj); if (rl.rlim_max == -1 && PyErr_Occurred()) return NULL; #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 *unused) { long pagesize = 0; #if defined(HAVE_GETPAGESIZE) pagesize = getpagesize(); #elif defined(HAVE_SYSCONF) #if defined(_SC_PAGE_SIZE) pagesize = sysconf(_SC_PAGE_SIZE); #else /* Irix 5.3 has _SC_PAGESIZE, but not _SC_PAGE_SIZE */ pagesize = sysconf(_SC_PAGESIZE); #endif #endif return Py_BuildValue("i", pagesize); } /* List of functions */ static struct PyMethodDef resource_methods[] = { {"getrusage", resource_getrusage, METH_VARARGS}, {"getrlimit", resource_getrlimit, METH_VARARGS}, {"setrlimit", resource_setrlimit, METH_VARARGS}, {"getpagesize", resource_getpagesize, METH_NOARGS}, {NULL, NULL} /* sentinel */ }; /* Module initialization */ PyMODINIT_FUNC initresource(void) { PyObject *m, *v; /* Create the module and add the functions */ m = Py_InitModule("resource", resource_methods); if (m == NULL) return; /* Add some symbolic constants to the module */ if (ResourceError == NULL) { ResourceError = PyErr_NewException("resource.error", NULL, NULL); } Py_INCREF(ResourceError); PyModule_AddObject(m, "error", ResourceError); if (!initialized) PyStructSequence_InitType(&StructRUsageType, &struct_rusage_desc); Py_INCREF(&StructRUsageType); PyModule_AddObject(m, "struct_rusage", (PyObject*) &StructRUsageType); /* insert constants */ #ifdef RLIMIT_CPU PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU); #endif #ifdef RLIMIT_FSIZE PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE); #endif #ifdef RLIMIT_DATA PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA); #endif #ifdef RLIMIT_STACK PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK); #endif #ifdef RLIMIT_CORE PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE); #endif #ifdef RLIMIT_NOFILE PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE); #endif #ifdef RLIMIT_OFILE PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE); #endif #ifdef RLIMIT_VMEM PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM); #endif #ifdef RLIMIT_AS PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS); #endif #ifdef RLIMIT_RSS PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS); #endif #ifdef RLIMIT_NPROC PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC); #endif #ifdef RLIMIT_MEMLOCK PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK); #endif #ifdef RUSAGE_SELF PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF); #endif #ifdef RUSAGE_CHILDREN PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN); #endif #ifdef RUSAGE_BOTH PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH); #endif #if defined(HAVE_LONG_LONG) if (sizeof(RLIM_INFINITY) > sizeof(long)) { v = PyLong_FromLongLong((PY_LONG_LONG) RLIM_INFINITY); } else #endif { v = PyInt_FromLong((long) RLIM_INFINITY); } if (v) { PyModule_AddObject(m, "RLIM_INFINITY", v); } initialized = 1; }