1 /*
2  * Copyright (C) 2018 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 #ifndef ANDROID_SENSORS_HIDL_ENVIRONMENT_BASE_H
18 #define ANDROID_SENSORS_HIDL_ENVIRONMENT_BASE_H
19 
20 #include <android/hardware/sensors/1.0/types.h>
21 #include <gtest/gtest.h>
22 
23 #include <atomic>
24 #include <memory>
25 #include <mutex>
26 #include <thread>
27 #include <vector>
28 
29 class IEventCallback {
30    public:
31     virtual ~IEventCallback() = default;
32     virtual void onEvent(const ::android::hardware::sensors::V1_0::Event& event) = 0;
33 };
34 
35 class SensorsHidlEnvironmentBase {
36   public:
37     using Event = ::android::hardware::sensors::V1_0::Event;
38     virtual void HidlSetUp();
39     virtual void HidlTearDown();
40 
41     // Get and clear all events collected so far (like "cat" shell command).
42     // If output is nullptr, it clears all collected events.
43     void catEvents(std::vector<Event>* output);
44 
45     // set sensor event collection status
46     void setCollection(bool enable);
47 
48     void registerCallback(IEventCallback* callback);
49     void unregisterCallback();
50 
51    protected:
SensorsHidlEnvironmentBase(const std::string & service_name)52      SensorsHidlEnvironmentBase(const std::string& service_name)
53          : mCollectionEnabled(false), mCallback(nullptr) {
54          mServiceName = service_name;
55      }
~SensorsHidlEnvironmentBase()56      virtual ~SensorsHidlEnvironmentBase(){};
57 
58      void addEvent(const Event& ev);
59 
60      virtual void startPollingThread() = 0;
61      virtual bool resetHal() = 0;
62 
63      std::string mServiceName;
64      bool mCollectionEnabled;
65      std::atomic_bool mStopThread;
66      std::thread mPollThread;
67      std::vector<Event> mEvents;
68      std::mutex mEventsMutex;
69 
70      IEventCallback* mCallback;
71 
72      GTEST_DISALLOW_COPY_AND_ASSIGN_(SensorsHidlEnvironmentBase);
73 };
74 
75 #endif  // ANDROID_SENSORS_HIDL_ENVIRONMENT_BASE_H