1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "info.h" 20 21 #include <memory> 22 #include <mutex> 23 24 // A class that keeps track of the current state of the WiFi HAL. This is 25 // accomplished by having the HAL call this state tracker which in turn will 26 // call the appropriate functionality. 27 // 28 // This is needed because the HAL must have some form of global state to prevent 29 // situations where the HAL is initialized while stopping. This class allows 30 // the Info class to stay relatively simple and this class can focus on just the 31 // state behavior. 32 class HalState { 33 public: 34 using StopHandler = std::function<void ()>; 35 36 HalState(); 37 38 bool init(); 39 bool stop(StopHandler stopHandler); 40 bool eventLoop(); 41 42 Info* info(); 43 44 private: 45 enum class State { 46 Constructed, 47 Initialized, 48 Running, 49 Stopping, 50 Stopped, 51 }; 52 53 void onStop(StopHandler stopHandler); 54 55 std::unique_ptr<Info> mInfo; 56 std::mutex mStateMutex; 57 State mState; 58 }; 59 60
