def __init__(self):
self._condition = Condition()
self._state = PENDING
self._result = None
self._exception = None
self._callbacks = []
self._waiters = []
def __init__(self, maxsize=0):
self.maxsize = maxsize
self._init(maxsize)
# mutex must be held whenever the queue is mutating. All methods
# that acquire mutex must release it before returning. mutex
# is shared between the three conditions, so acquiring and
# releasing the conditions also acquires and releases mutex.
self.mutex = Lock()
# Notify not_empty whenever an item is added to the queue; a
# task waiting to get is notified then.
self.not_empty = Condition(self.mutex)
# Notify not_full whenever an item is removed from the queue;
# a task waiting to put is notified then.
self.not_full = Condition(self.mutex)
# Notify all_tasks_done whenever the number of unfinished tasks
# drops to zero; task waiting to join() is notified to resume
self.all_tasks_done = Condition(self.mutex)
self.unfinished_tasks = 0
def __init__(self):
self._lock = Lock()
self._cond = Condition(Lock())
self._locked = False
self._used = False
self._exc = self._value = Null
def __init__(self):
self._cond = Condition(Lock())
self._flag = False
