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import sys
if sys.platform == 'win32':
raise ImportError('resource module not available for win32')
# load the platform-specific cache made by running resource.ctc.py
from ctypes_config_cache._resource_cache import *
from ctypes_support import standard_c_lib as libc
from ctypes_support import get_errno
from ctypes import Structure, c_int, c_long, byref, POINTER
from errno import EINVAL, EPERM
import _structseq
try: from __pypy__ import builtinify
except ImportError: builtinify = lambda f: f
class error(Exception):
pass
# Read required libc functions
_getrusage = libc.getrusage
_getrlimit = libc.getrlimit
_setrlimit = libc.setrlimit
try:
_getpagesize = libc.getpagesize
_getpagesize.argtypes = ()
_getpagesize.restype = c_int
except AttributeError:
from os import sysconf
_getpagesize = None
class timeval(Structure):
_fields_ = (
("tv_sec", c_long),
("tv_usec", c_long),
)
def __str__(self):
return "(%s, %s)" % (self.tv_sec, self.tv_usec)
def __float__(self):
return self.tv_sec + self.tv_usec/1000000.0
class _struct_rusage(Structure):
_fields_ = (
("ru_utime", timeval),
("ru_stime", timeval),
("ru_maxrss", c_long),
("ru_ixrss", c_long),
("ru_idrss", c_long),
("ru_isrss", c_long),
("ru_minflt", c_long),
("ru_majflt", c_long),
("ru_nswap", c_long),
("ru_inblock", c_long),
("ru_oublock", c_long),
("ru_msgsnd", c_long),
("ru_msgrcv", c_long),
("ru_nsignals", c_long),
("ru_nvcsw", c_long),
("ru_nivcsw", c_long),
)
_getrusage.argtypes = (c_int, POINTER(_struct_rusage))
_getrusage.restype = c_int
class struct_rusage:
__metaclass__ = _structseq.structseqtype
ru_utime = _structseq.structseqfield(0)
ru_stime = _structseq.structseqfield(1)
ru_maxrss = _structseq.structseqfield(2)
ru_ixrss = _structseq.structseqfield(3)
ru_idrss = _structseq.structseqfield(4)
ru_isrss = _structseq.structseqfield(5)
ru_minflt = _structseq.structseqfield(6)
ru_majflt = _structseq.structseqfield(7)
ru_nswap = _structseq.structseqfield(8)
ru_inblock = _structseq.structseqfield(9)
ru_oublock = _structseq.structseqfield(10)
ru_msgsnd = _structseq.structseqfield(11)
ru_msgrcv = _structseq.structseqfield(12)
ru_nsignals = _structseq.structseqfield(13)
ru_nvcsw = _structseq.structseqfield(14)
ru_nivcsw = _structseq.structseqfield(15)
@builtinify
def rlimit_check_bounds(rlim_cur, rlim_max):
if rlim_cur > rlim_t_max:
raise ValueError("%d does not fit into rlim_t" % rlim_cur)
if rlim_max > rlim_t_max:
raise ValueError("%d does not fit into rlim_t" % rlim_max)
class rlimit(Structure):
_fields_ = (
("rlim_cur", rlim_t),
("rlim_max", rlim_t),
)
_getrlimit.argtypes = (c_int, POINTER(rlimit))
_getrlimit.restype = c_int
_setrlimit.argtypes = (c_int, POINTER(rlimit))
_setrlimit.restype = c_int
@builtinify
def getrusage(who):
ru = _struct_rusage()
ret = _getrusage(who, byref(ru))
if ret == -1:
errno = get_errno()
if errno == EINVAL:
raise ValueError("invalid who parameter")
raise error(errno)
return struct_rusage((
float(ru.ru_utime),
float(ru.ru_stime),
ru.ru_maxrss,
ru.ru_ixrss,
ru.ru_idrss,
ru.ru_isrss,
ru.ru_minflt,
ru.ru_majflt,
ru.ru_nswap,
ru.ru_inblock,
ru.ru_oublock,
ru.ru_msgsnd,
ru.ru_msgrcv,
ru.ru_nsignals,
ru.ru_nvcsw,
ru.ru_nivcsw,
))
@builtinify
def getrlimit(resource):
if not(0 <= resource < RLIM_NLIMITS):
return ValueError("invalid resource specified")
rlim = rlimit()
ret = _getrlimit(resource, byref(rlim))
if ret == -1:
errno = get_errno()
raise error(errno)
return (rlim.rlim_cur, rlim.rlim_max)
@builtinify
def setrlimit(resource, rlim):
if not(0 <= resource < RLIM_NLIMITS):
return ValueError("invalid resource specified")
rlimit_check_bounds(*rlim)
rlim = rlimit(rlim[0], rlim[1])
ret = _setrlimit(resource, byref(rlim))
if ret == -1:
errno = get_errno()
if errno == EINVAL:
return ValueError("current limit exceeds maximum limit")
elif errno == EPERM:
return ValueError("not allowed to raise maximum limit")
else:
raise error(errno)
@builtinify
def getpagesize():
if _getpagesize:
return _getpagesize()
else:
try:
return sysconf("SC_PAGE_SIZE")
except ValueError:
# Irix 5.3 has _SC_PAGESIZE, but not _SC_PAGE_SIZE
return sysconf("SC_PAGESIZE")
__all__ = ALL_CONSTANTS + (
'error', 'timeval', 'struct_rusage', 'rlimit',
'getrusage', 'getrlimit', 'setrlimit', 'getpagesize',
)
del ALL_CONSTANTS
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