mirror of
https://github.com/python/cpython
synced 2024-09-05 08:17:45 +00:00
553 lines
14 KiB
C
553 lines
14 KiB
C
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#include "Python.h"
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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/* On some systems, these aren't in any header file.
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On others they are, with inconsistent prototypes.
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We declare the (default) return type, to shut up gcc -Wall;
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but we can't declare the prototype, to avoid errors
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when the header files declare it different.
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Worse, on some Linuxes, getpagesize() returns a size_t... */
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#define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
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/*[clinic input]
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module resource
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=e89d38ed52609d7c]*/
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/*[python input]
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class pid_t_converter(CConverter):
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type = 'pid_t'
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format_unit = '" _Py_PARSE_PID "'
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def parse_arg(self, argname, displayname):
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return """
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{paramname} = PyLong_AsPid({argname});
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if ({paramname} == -1 && PyErr_Occurred()) {{{{
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goto exit;
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}}}}
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""".format(argname=argname, paramname=self.parser_name)
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[python start generated code]*/
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/*[python end generated code: output=da39a3ee5e6b4b0d input=5af1c116d56cbb5a]*/
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#include "clinic/resource.c.h"
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PyDoc_STRVAR(struct_rusage__doc__,
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"struct_rusage: Result from getrusage.\n\n"
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"This object may be accessed either as a tuple of\n"
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" (utime,stime,maxrss,ixrss,idrss,isrss,minflt,majflt,\n"
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" nswap,inblock,oublock,msgsnd,msgrcv,nsignals,nvcsw,nivcsw)\n"
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"or via the attributes ru_utime, ru_stime, ru_maxrss, and so on.");
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static PyStructSequence_Field struct_rusage_fields[] = {
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{"ru_utime", "user time used"},
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{"ru_stime", "system time used"},
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{"ru_maxrss", "max. resident set size"},
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{"ru_ixrss", "shared memory size"},
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{"ru_idrss", "unshared data size"},
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{"ru_isrss", "unshared stack size"},
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{"ru_minflt", "page faults not requiring I/O"},
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{"ru_majflt", "page faults requiring I/O"},
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{"ru_nswap", "number of swap outs"},
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{"ru_inblock", "block input operations"},
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{"ru_oublock", "block output operations"},
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{"ru_msgsnd", "IPC messages sent"},
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{"ru_msgrcv", "IPC messages received"},
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{"ru_nsignals", "signals received"},
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{"ru_nvcsw", "voluntary context switches"},
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{"ru_nivcsw", "involuntary context switches"},
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{0}
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};
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static PyStructSequence_Desc struct_rusage_desc = {
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"resource.struct_rusage", /* name */
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struct_rusage__doc__, /* doc */
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struct_rusage_fields, /* fields */
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16 /* n_in_sequence */
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};
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typedef struct {
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PyTypeObject *StructRUsageType;
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} resourcemodulestate;
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static inline resourcemodulestate*
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get_resource_state(PyObject *module)
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{
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void *state = PyModule_GetState(module);
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assert(state != NULL);
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return (resourcemodulestate *)state;
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}
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static struct PyModuleDef resourcemodule;
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#ifdef HAVE_GETRUSAGE
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/*[clinic input]
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resource.getrusage
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who: int
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/
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[clinic start generated code]*/
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static PyObject *
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resource_getrusage_impl(PyObject *module, int who)
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/*[clinic end generated code: output=8fad2880ba6a9843 input=5c857bcc5b9ccb1b]*/
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{
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struct rusage ru;
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PyObject *result;
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if (getrusage(who, &ru) == -1) {
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if (errno == EINVAL) {
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PyErr_SetString(PyExc_ValueError,
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"invalid who parameter");
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return NULL;
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}
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PyErr_SetFromErrno(PyExc_OSError);
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return NULL;
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}
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result = PyStructSequence_New(
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get_resource_state(module)->StructRUsageType);
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if (!result)
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return NULL;
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PyStructSequence_SET_ITEM(result, 0,
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PyFloat_FromDouble(doubletime(ru.ru_utime)));
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PyStructSequence_SET_ITEM(result, 1,
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PyFloat_FromDouble(doubletime(ru.ru_stime)));
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PyStructSequence_SET_ITEM(result, 2, PyLong_FromLong(ru.ru_maxrss));
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PyStructSequence_SET_ITEM(result, 3, PyLong_FromLong(ru.ru_ixrss));
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PyStructSequence_SET_ITEM(result, 4, PyLong_FromLong(ru.ru_idrss));
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PyStructSequence_SET_ITEM(result, 5, PyLong_FromLong(ru.ru_isrss));
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PyStructSequence_SET_ITEM(result, 6, PyLong_FromLong(ru.ru_minflt));
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PyStructSequence_SET_ITEM(result, 7, PyLong_FromLong(ru.ru_majflt));
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PyStructSequence_SET_ITEM(result, 8, PyLong_FromLong(ru.ru_nswap));
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PyStructSequence_SET_ITEM(result, 9, PyLong_FromLong(ru.ru_inblock));
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PyStructSequence_SET_ITEM(result, 10, PyLong_FromLong(ru.ru_oublock));
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PyStructSequence_SET_ITEM(result, 11, PyLong_FromLong(ru.ru_msgsnd));
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PyStructSequence_SET_ITEM(result, 12, PyLong_FromLong(ru.ru_msgrcv));
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PyStructSequence_SET_ITEM(result, 13, PyLong_FromLong(ru.ru_nsignals));
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PyStructSequence_SET_ITEM(result, 14, PyLong_FromLong(ru.ru_nvcsw));
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PyStructSequence_SET_ITEM(result, 15, PyLong_FromLong(ru.ru_nivcsw));
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if (PyErr_Occurred()) {
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Py_DECREF(result);
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return NULL;
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}
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return result;
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}
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#endif
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static int
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py2rlimit(PyObject *limits, struct rlimit *rl_out)
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{
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PyObject *curobj, *maxobj;
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limits = PySequence_Tuple(limits);
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if (!limits)
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/* Here limits is a borrowed reference */
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return -1;
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if (PyTuple_GET_SIZE(limits) != 2) {
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PyErr_SetString(PyExc_ValueError,
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"expected a tuple of 2 integers");
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goto error;
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}
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curobj = PyTuple_GET_ITEM(limits, 0);
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maxobj = PyTuple_GET_ITEM(limits, 1);
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#if !defined(HAVE_LARGEFILE_SUPPORT)
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rl_out->rlim_cur = PyLong_AsLong(curobj);
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if (rl_out->rlim_cur == (rlim_t)-1 && PyErr_Occurred())
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goto error;
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rl_out->rlim_max = PyLong_AsLong(maxobj);
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if (rl_out->rlim_max == (rlim_t)-1 && PyErr_Occurred())
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goto error;
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#else
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/* The limits are probably bigger than a long */
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rl_out->rlim_cur = PyLong_AsLongLong(curobj);
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if (rl_out->rlim_cur == (rlim_t)-1 && PyErr_Occurred())
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goto error;
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rl_out->rlim_max = PyLong_AsLongLong(maxobj);
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if (rl_out->rlim_max == (rlim_t)-1 && PyErr_Occurred())
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goto error;
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#endif
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Py_DECREF(limits);
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rl_out->rlim_cur = rl_out->rlim_cur & RLIM_INFINITY;
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rl_out->rlim_max = rl_out->rlim_max & RLIM_INFINITY;
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return 0;
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error:
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Py_DECREF(limits);
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return -1;
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}
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static PyObject*
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rlimit2py(struct rlimit rl)
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{
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if (sizeof(rl.rlim_cur) > sizeof(long)) {
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return Py_BuildValue("LL",
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(long long) rl.rlim_cur,
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(long long) rl.rlim_max);
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}
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return Py_BuildValue("ll", (long) rl.rlim_cur, (long) rl.rlim_max);
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}
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/*[clinic input]
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resource.getrlimit
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resource: int
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/
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[clinic start generated code]*/
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static PyObject *
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resource_getrlimit_impl(PyObject *module, int resource)
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/*[clinic end generated code: output=98327b25061ffe39 input=a697cb0004cb3c36]*/
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{
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struct rlimit rl;
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if (resource < 0 || resource >= RLIM_NLIMITS) {
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PyErr_SetString(PyExc_ValueError,
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"invalid resource specified");
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return NULL;
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}
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if (getrlimit(resource, &rl) == -1) {
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PyErr_SetFromErrno(PyExc_OSError);
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return NULL;
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}
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return rlimit2py(rl);
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}
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/*[clinic input]
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resource.setrlimit
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resource: int
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limits: object
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/
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[clinic start generated code]*/
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static PyObject *
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resource_setrlimit_impl(PyObject *module, int resource, PyObject *limits)
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/*[clinic end generated code: output=4e82ec3f34d013d1 input=6235a6ce23b4ca75]*/
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{
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struct rlimit rl;
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if (resource < 0 || resource >= RLIM_NLIMITS) {
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PyErr_SetString(PyExc_ValueError,
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"invalid resource specified");
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return NULL;
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}
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if (PySys_Audit("resource.setrlimit", "iO", resource,
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limits ? limits : Py_None) < 0) {
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return NULL;
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}
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if (py2rlimit(limits, &rl) < 0) {
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return NULL;
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}
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if (setrlimit(resource, &rl) == -1) {
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if (errno == EINVAL)
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PyErr_SetString(PyExc_ValueError,
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"current limit exceeds maximum limit");
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else if (errno == EPERM)
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PyErr_SetString(PyExc_ValueError,
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"not allowed to raise maximum limit");
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else
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PyErr_SetFromErrno(PyExc_OSError);
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return NULL;
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}
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Py_RETURN_NONE;
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}
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#ifdef HAVE_PRLIMIT
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/*[clinic input]
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resource.prlimit
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pid: pid_t
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resource: int
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limits: object = None
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/
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[clinic start generated code]*/
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static PyObject *
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resource_prlimit_impl(PyObject *module, pid_t pid, int resource,
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PyObject *limits)
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/*[clinic end generated code: output=6ebc49ff8c3a816e input=54bb69c9585e33bf]*/
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{
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struct rlimit old_limit, new_limit;
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int retval;
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if (resource < 0 || resource >= RLIM_NLIMITS) {
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PyErr_SetString(PyExc_ValueError,
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"invalid resource specified");
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return NULL;
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}
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if (PySys_Audit("resource.prlimit", "iiO", pid, resource,
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limits ? limits : Py_None) < 0) {
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return NULL;
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}
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if (limits != Py_None) {
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if (py2rlimit(limits, &new_limit) < 0) {
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return NULL;
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}
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retval = prlimit(pid, resource, &new_limit, &old_limit);
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}
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else {
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retval = prlimit(pid, resource, NULL, &old_limit);
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}
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if (retval == -1) {
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if (errno == EINVAL) {
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PyErr_SetString(PyExc_ValueError,
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"current limit exceeds maximum limit");
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} else {
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PyErr_SetFromErrno(PyExc_OSError);
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}
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return NULL;
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}
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return rlimit2py(old_limit);
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}
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#endif /* HAVE_PRLIMIT */
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/*[clinic input]
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resource.getpagesize -> int
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[clinic start generated code]*/
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static int
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resource_getpagesize_impl(PyObject *module)
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/*[clinic end generated code: output=9ba93eb0f3d6c3a9 input=546545e8c1f42085]*/
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{
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long pagesize = 0;
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#if defined(HAVE_GETPAGESIZE)
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pagesize = getpagesize();
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#elif defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
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pagesize = sysconf(_SC_PAGE_SIZE);
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#else
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# error "unsupported platform: resource.getpagesize()"
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#endif
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return pagesize;
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}
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/* List of functions */
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static struct PyMethodDef
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resource_methods[] = {
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RESOURCE_GETRUSAGE_METHODDEF
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RESOURCE_GETRLIMIT_METHODDEF
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RESOURCE_PRLIMIT_METHODDEF
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RESOURCE_SETRLIMIT_METHODDEF
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RESOURCE_GETPAGESIZE_METHODDEF
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{NULL, NULL} /* sentinel */
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};
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/* Module initialization */
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static int
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resource_exec(PyObject *module)
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{
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resourcemodulestate *state = get_resource_state(module);
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#define ADD_INT(module, value) \
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do { \
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if (PyModule_AddIntConstant(module, #value, value) < 0) { \
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return -1; \
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} \
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} while (0)
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/* Add some symbolic constants to the module */
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Py_INCREF(PyExc_OSError);
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if (PyModule_AddObject(module, "error", PyExc_OSError) < 0) {
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Py_DECREF(PyExc_OSError);
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return -1;
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}
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state->StructRUsageType = PyStructSequence_NewType(&struct_rusage_desc);
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if (state->StructRUsageType == NULL) {
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return -1;
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}
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if (PyModule_AddType(module, state->StructRUsageType) < 0) {
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return -1;
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}
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/* insert constants */
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#ifdef RLIMIT_CPU
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ADD_INT(module, RLIMIT_CPU);
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#endif
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#ifdef RLIMIT_FSIZE
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ADD_INT(module, RLIMIT_FSIZE);
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#endif
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#ifdef RLIMIT_DATA
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ADD_INT(module, RLIMIT_DATA);
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#endif
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#ifdef RLIMIT_STACK
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ADD_INT(module, RLIMIT_STACK);
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#endif
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#ifdef RLIMIT_CORE
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ADD_INT(module, RLIMIT_CORE);
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#endif
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#ifdef RLIMIT_NOFILE
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ADD_INT(module, RLIMIT_NOFILE);
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#endif
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#ifdef RLIMIT_OFILE
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ADD_INT(module, RLIMIT_OFILE);
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#endif
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#ifdef RLIMIT_VMEM
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ADD_INT(module, RLIMIT_VMEM);
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#endif
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#ifdef RLIMIT_AS
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ADD_INT(module, RLIMIT_AS);
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#endif
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#ifdef RLIMIT_RSS
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ADD_INT(module, RLIMIT_RSS);
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#endif
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#ifdef RLIMIT_NPROC
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ADD_INT(module, RLIMIT_NPROC);
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#endif
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#ifdef RLIMIT_MEMLOCK
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ADD_INT(module, RLIMIT_MEMLOCK);
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#endif
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#ifdef RLIMIT_SBSIZE
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ADD_INT(module, RLIMIT_SBSIZE);
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#endif
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/* Linux specific */
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#ifdef RLIMIT_MSGQUEUE
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ADD_INT(module, RLIMIT_MSGQUEUE);
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#endif
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#ifdef RLIMIT_NICE
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ADD_INT(module, RLIMIT_NICE);
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#endif
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#ifdef RLIMIT_RTPRIO
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ADD_INT(module, RLIMIT_RTPRIO);
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#endif
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#ifdef RLIMIT_RTTIME
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ADD_INT(module, RLIMIT_RTTIME);
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#endif
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#ifdef RLIMIT_SIGPENDING
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ADD_INT(module, RLIMIT_SIGPENDING);
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#endif
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/* target */
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#ifdef RUSAGE_SELF
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ADD_INT(module, RUSAGE_SELF);
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#endif
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#ifdef RUSAGE_CHILDREN
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ADD_INT(module, RUSAGE_CHILDREN);
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#endif
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#ifdef RUSAGE_BOTH
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ADD_INT(module, RUSAGE_BOTH);
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#endif
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#ifdef RUSAGE_THREAD
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ADD_INT(module, RUSAGE_THREAD);
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#endif
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/* FreeBSD specific */
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#ifdef RLIMIT_SWAP
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ADD_INT(module, RLIMIT_SWAP);
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#endif
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#ifdef RLIMIT_SBSIZE
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ADD_INT(module, RLIMIT_SBSIZE);
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#endif
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#ifdef RLIMIT_NPTS
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ADD_INT(module, RLIMIT_NPTS);
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#endif
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#ifdef RLIMIT_KQUEUES
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ADD_INT(module, RLIMIT_KQUEUES);
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#endif
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PyObject *v;
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if (sizeof(RLIM_INFINITY) > sizeof(long)) {
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v = PyLong_FromLongLong((long long) RLIM_INFINITY);
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} else
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{
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v = PyLong_FromLong((long) RLIM_INFINITY);
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}
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if (!v) {
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return -1;
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}
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if (PyModule_AddObject(module, "RLIM_INFINITY", v) < 0) {
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Py_DECREF(v);
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return -1;
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}
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return 0;
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#undef ADD_INT
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}
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static struct PyModuleDef_Slot resource_slots[] = {
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{Py_mod_exec, resource_exec},
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{0, NULL}
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};
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static int
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resourcemodule_traverse(PyObject *m, visitproc visit, void *arg) {
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Py_VISIT(get_resource_state(m)->StructRUsageType);
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return 0;
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}
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static int
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resourcemodule_clear(PyObject *m) {
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Py_CLEAR(get_resource_state(m)->StructRUsageType);
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return 0;
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}
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|
|
static void
|
|
resourcemodule_free(void *m) {
|
|
resourcemodule_clear((PyObject *)m);
|
|
}
|
|
|
|
static struct PyModuleDef resourcemodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
.m_name = "resource",
|
|
.m_size = sizeof(resourcemodulestate),
|
|
.m_methods = resource_methods,
|
|
.m_slots = resource_slots,
|
|
.m_traverse = resourcemodule_traverse,
|
|
.m_clear = resourcemodule_clear,
|
|
.m_free = resourcemodule_free,
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit_resource(void)
|
|
{
|
|
return PyModuleDef_Init(&resourcemodule);
|
|
}
|