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#
# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import multiprocessing
from host_controller import common
class SharedDict(object):
"""Class for the state of devices connected to the host.
shared between the main process and the process pool.
Attributes:
_manager: SyncManager. an instance of a manager for shared objects and
values between processes.
_dict: multiprocessing.SyncManager.dict. A dictionary
shared among processes.
"""
def __init__(self, manager=None):
if manager is not None:
self._manager = manager
else:
self._manager = multiprocessing.Manager()
self._dict = self._manager.dict()
def __getitem__(self, key):
"""getitem for self._dict.
Args:
key: string, serial number of a device.
Returns:
integer value defined in _DEVICE_STATUS_DICT.
"""
if key not in self._dict:
self._dict[key] = common._DEVICE_STATUS_DICT["unknown"]
return self._dict[key]
def __setitem__(self, key, value):
"""setitem for self._dict.
if the value is not a defined one, device status is set to "unknown".
Args:
key: string, serial number of a device.
value: integer, status value defined in _DEVICE_STATUS_DICT.
"""
if value not in range(len(common._DEVICE_STATUS_DICT)):
self._dict[key] = common._DEVICE_STATUS_DICT["unknown"]
else:
self._dict[key] = value
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