def __init__(self):
self._owner = None
self._block = _allocate_lock()
self._locking = {}
self._count = 0
def __init__(self):
self._owner = None
self._block = _allocate_lock()
self._locking = {}
self._count = 0
# Cython, each individual method holds the GIL for its entire
# duration, ensuring that no other thread can interrupt us in an
# unsafe state (only when we _do_wait do we call back into Python and
# allow switching threads). Simulate that here through the use of a manual
# lock. (We use a separate lock for each semaphore to allow sys.settrace functions
# to use locks *other* than the one being traced.)
if PYPY:
# TODO: Need to use monkey.get_original?
try:
from _thread import allocate_lock as _allocate_lock # pylint:disable=import-error,useless-suppression
from _thread import get_ident as _get_ident # pylint:disable=import-error,useless-suppression
except ImportError:
# Python 2
from thread import allocate_lock as _allocate_lock # pylint:disable=import-error,useless-suppression
from thread import get_ident as _get_ident # pylint:disable=import-error,useless-suppression
_sem_lock = _allocate_lock()
def untraceable(f):
# Don't allow re-entry to these functions in a single thread, as can
# happen if a sys.settrace is used
def wrapper(self):
me = _get_ident()
try:
count = self._locking[me]
except KeyError:
count = self._locking[me] = 1
else:
count = self._locking[me] = count + 1
if count:
return
# Cython, each individual method holds the GIL for its entire
# duration, ensuring that no other thread can interrupt us in an
# unsafe state (only when we _do_wait do we call back into Python and
# allow switching threads). Simulate that here through the use of a manual
# lock. (We use a separate lock for each semaphore to allow sys.settrace functions
# to use locks *other* than the one being traced.)
if PYPY:
# TODO: Need to use monkey.get_original?
try:
from _thread import allocate_lock as _allocate_lock # pylint:disable=import-error,useless-suppression
from _thread import get_ident as _get_ident # pylint:disable=import-error,useless-suppression
except ImportError:
# Python 2
from thread import allocate_lock as _allocate_lock # pylint:disable=import-error,useless-suppression
from thread import get_ident as _get_ident # pylint:disable=import-error,useless-suppression
_sem_lock = _allocate_lock()
def untraceable(f):
# Don't allow re-entry to these functions in a single thread, as can
# happen if a sys.settrace is used
def wrapper(self):
me = _get_ident()
try:
count = self._locking[me]
except KeyError:
count = self._locking[me] = 1
else:
count = self._locking[me] = count + 1
if count:
return
