# eventpy library
# Copyright (C) 2020 Wang Qi (wqking)
# Github: https://github.com/wqking/eventpy
# 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.

class LockGuard :
    def __init__(self, lock) :
        self._lock = lock

    def __enter__(self) :
        self.lock()
        return self

    def __exit__(self, type, value, traceBack) :
        self.unlock()
	
    def lock(self) :
        self._lock.acquire()

    def unlock(self) :
        self._lock.release()