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"""
Low-level implementations for the external functions of the 'time' module.
"""
import time, sys, math
from errno import EINTR
from rpython.rtyper.lltypesystem import rffi
from rpython.rtyper.tool import rffi_platform as platform
from rpython.rtyper.lltypesystem import lltype
from rpython.rtyper.extfunc import BaseLazyRegistering, registering, extdef
from rpython.rlib import rposix
from rpython.rlib.rarithmetic import intmask, UINT_MAX
from rpython.translator.tool.cbuild import ExternalCompilationInfo
if sys.platform == 'win32':
TIME_H = 'time.h'
FTIME = '_ftime64'
STRUCT_TIMEB = 'struct __timeb64'
includes = ['winsock2.h', 'windows.h',
TIME_H, 'sys/types.h', 'sys/timeb.h']
need_rusage = False
else:
TIME_H = 'sys/time.h'
FTIME = 'ftime'
STRUCT_TIMEB = 'struct timeb'
includes = [TIME_H, 'time.h', 'errno.h', 'sys/select.h',
'sys/types.h', 'unistd.h',
'sys/time.h', 'sys/resource.h']
if not sys.platform.startswith("openbsd"):
includes.append('sys/timeb.h')
need_rusage = True
class CConfig:
_compilation_info_ = ExternalCompilationInfo(
includes=includes
)
TIMEVAL = platform.Struct('struct timeval', [('tv_sec', rffi.INT),
('tv_usec', rffi.INT)])
HAVE_GETTIMEOFDAY = platform.Has('gettimeofday')
HAVE_FTIME = platform.Has(FTIME)
if need_rusage:
RUSAGE = platform.Struct('struct rusage', [('ru_utime', TIMEVAL),
('ru_stime', TIMEVAL)])
if sys.platform.startswith('freebsd') or sys.platform.startswith('netbsd'):
libraries = ['compat']
else:
libraries = []
class CConfigForFTime:
_compilation_info_ = ExternalCompilationInfo(
includes=[TIME_H, 'sys/timeb.h'],
libraries=libraries
)
TIMEB = platform.Struct(STRUCT_TIMEB, [('time', rffi.INT),
('millitm', rffi.INT)])
constant_names = ['RUSAGE_SELF', 'EINTR']
for const in constant_names:
setattr(CConfig, const, platform.DefinedConstantInteger(const))
defs_names = ['GETTIMEOFDAY_NO_TZ']
for const in defs_names:
setattr(CConfig, const, platform.Defined(const))
def decode_timeval(t):
return (float(rffi.getintfield(t, 'c_tv_sec')) +
float(rffi.getintfield(t, 'c_tv_usec')) * 0.000001)
class RegisterTime(BaseLazyRegistering):
def __init__(self):
self.configure(CConfig)
self.TIMEVALP = lltype.Ptr(self.TIMEVAL)
@registering(time.time)
def register_time_time(self):
# Note: time.time() is used by the framework GC during collect(),
# which means that we have to be very careful about not allocating
# GC memory here. This is the reason for the _nowrapper=True.
# AWFUL
if self.HAVE_GETTIMEOFDAY:
if self.GETTIMEOFDAY_NO_TZ:
c_gettimeofday = self.llexternal('gettimeofday',
[self.TIMEVALP], rffi.INT,
_nowrapper=True, releasegil=False)
else:
c_gettimeofday = self.llexternal('gettimeofday',
[self.TIMEVALP, rffi.VOIDP], rffi.INT,
_nowrapper=True, releasegil=False)
c_ftime = None # We have gettimeofday(2), so force ftime(3) OFF.
else:
c_gettimeofday = None
# Only look for ftime(3) if gettimeofday(2) was not found.
if self.HAVE_FTIME:
self.configure(CConfigForFTime)
c_ftime = self.llexternal(FTIME, [lltype.Ptr(self.TIMEB)],
lltype.Void,
_nowrapper=True, releasegil=False)
else:
c_ftime = None # to not confuse the flow space
c_time = self.llexternal('time', [rffi.VOIDP], rffi.TIME_T,
_nowrapper=True, releasegil=False)
def time_time_llimpl():
void = lltype.nullptr(rffi.VOIDP.TO)
result = -1.0
if self.HAVE_GETTIMEOFDAY:
t = lltype.malloc(self.TIMEVAL, flavor='raw')
errcode = -1
if self.GETTIMEOFDAY_NO_TZ:
errcode = c_gettimeofday(t)
else:
errcode = c_gettimeofday(t, void)
if rffi.cast(rffi.LONG, errcode) == 0:
result = decode_timeval(t)
lltype.free(t, flavor='raw')
if result != -1:
return result
else: # assume using ftime(3)
t = lltype.malloc(self.TIMEB, flavor='raw')
c_ftime(t)
result = (float(intmask(t.c_time)) +
float(intmask(t.c_millitm)) * 0.001)
lltype.free(t, flavor='raw')
return result
return float(c_time(void))
return extdef([], float, llimpl=time_time_llimpl,
export_name='ll_time.ll_time_time')
@registering(time.clock)
def register_time_clock(self):
if sys.platform == 'win32':
# hacking to avoid LARGE_INTEGER which is a union...
A = lltype.FixedSizeArray(lltype.SignedLongLong, 1)
QueryPerformanceCounter = self.llexternal(
'QueryPerformanceCounter', [lltype.Ptr(A)], lltype.Void,
releasegil=False)
QueryPerformanceFrequency = self.llexternal(
'QueryPerformanceFrequency', [lltype.Ptr(A)], rffi.INT,
releasegil=False)
class State(object):
pass
state = State()
state.divisor = 0.0
state.counter_start = 0
def time_clock_llimpl():
a = lltype.malloc(A, flavor='raw')
if state.divisor == 0.0:
QueryPerformanceCounter(a)
state.counter_start = a[0]
QueryPerformanceFrequency(a)
state.divisor = float(a[0])
QueryPerformanceCounter(a)
diff = a[0] - state.counter_start
lltype.free(a, flavor='raw')
return float(diff) / state.divisor
else:
RUSAGE = self.RUSAGE
RUSAGE_SELF = self.RUSAGE_SELF or 0
c_getrusage = self.llexternal('getrusage',
[rffi.INT, lltype.Ptr(RUSAGE)],
lltype.Void,
releasegil=False)
def time_clock_llimpl():
a = lltype.malloc(RUSAGE, flavor='raw')
c_getrusage(RUSAGE_SELF, a)
result = (decode_timeval(a.c_ru_utime) +
decode_timeval(a.c_ru_stime))
lltype.free(a, flavor='raw')
return result
return extdef([], float, llimpl=time_clock_llimpl,
export_name='ll_time.ll_time_clock')
@registering(time.sleep)
def register_time_sleep(self):
if sys.platform == 'win32':
Sleep = self.llexternal('Sleep', [rffi.ULONG], lltype.Void)
def time_sleep_llimpl(secs):
millisecs = secs * 1000.0
while millisecs > UINT_MAX:
Sleep(UINT_MAX)
millisecs -= UINT_MAX
Sleep(rffi.cast(rffi.ULONG, int(millisecs)))
else:
c_select = self.llexternal('select', [rffi.INT, rffi.VOIDP,
rffi.VOIDP, rffi.VOIDP,
self.TIMEVALP], rffi.INT)
def time_sleep_llimpl(secs):
void = lltype.nullptr(rffi.VOIDP.TO)
t = lltype.malloc(self.TIMEVAL, flavor='raw')
try:
frac = math.fmod(secs, 1.0)
rffi.setintfield(t, 'c_tv_sec', int(secs))
rffi.setintfield(t, 'c_tv_usec', int(frac*1000000.0))
if rffi.cast(rffi.LONG, c_select(0, void, void, void, t)) != 0:
errno = rposix.get_errno()
if errno != EINTR:
raise OSError(rposix.get_errno(), "Select failed")
finally:
lltype.free(t, flavor='raw')
return extdef([float], None, llimpl=time_sleep_llimpl,
export_name='ll_time.ll_time_sleep')
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