1# Copyright 2016 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import threading 16from concurrent import futures 17 18 19class RecordingThreadPool(futures.Executor): 20 """A thread pool that records if used.""" 21 22 def __init__(self, max_workers): 23 self._tp_executor = futures.ThreadPoolExecutor(max_workers=max_workers) 24 self._lock = threading.Lock() 25 self._was_used = False 26 27 def submit(self, fn, *args, **kwargs): 28 with self._lock: 29 self._was_used = True 30 self._tp_executor.submit(fn, *args, **kwargs) 31 32 def was_used(self): 33 with self._lock: 34 return self._was_used 35