def __init__(self, maxsize=0):
if maxsize <= 0:
maxsize = _multiprocessing.SemLock.SEM_VALUE_MAX
self._maxsize = maxsize
self._reader, self._writer = Pipe(duplex=False)
self._rlock = Lock()
self._opid = os.getpid()
if sys.platform == 'win32':
self._wlock = None
else:
self._wlock = Lock()
self._sem = BoundedSemaphore(maxsize)
self._after_fork()
if sys.platform != 'win32':
register_after_fork(self, Queue._after_fork)
def BoundedSemaphore(value=1):
'''
Returns a bounded semaphore object
'''
from multiprocess.synchronize import BoundedSemaphore
return BoundedSemaphore(value)
