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Hopefully fix rare case when sync would get stuck indefinitely

This commit is contained in:
croneter 2021-01-31 17:39:44 +01:00
parent 63144ba070
commit f192c0912c
1 changed files with 8 additions and 3 deletions
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11
resources/lib/backgroundthread.py
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@ -136,6 +136,11 @@ class ProcessingQueue(Queue.Queue, object):
return self._current_queue._qsize() if self._current_queue else 0
def _total_qsize(self):
"""
This method is BROKEN as it can lead to a deadlock when a single item
from the current section takes longer to download then any new items
coming in
"""
return sum(q._qsize() for q in self._queues) if self._queues else 0
def put(self, item, block=True, timeout=None):
@ -147,16 +152,16 @@ class ProcessingQueue(Queue.Queue, object):
try:
if self.maxsize > 0:
if not block:
if self._total_qsize() == self.maxsize:
if self._qsize() == self.maxsize:
raise Queue.Full
elif timeout is None:
while self._total_qsize() == self.maxsize:
while self._qsize() == self.maxsize:
self.not_full.wait()
elif timeout < 0:
raise ValueError("'timeout' must be a non-negative number")
else:
endtime = _time() + timeout
while self._total_qsize() == self.maxsize:
while self._qsize() == self.maxsize:
remaining = endtime - _time()
if remaining <= 0.0:
raise Queue.Full