1 /*
2  * Copyright (C) 2020 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 <aidl/android/hardware/gnss/BnGnssMeasurementCallback.h>
20 #include <aidl/android/hardware/gnss/BnGnssMeasurementInterface.h>
21 #include <atomic>
22 #include <mutex>
23 #include <thread>
24 
25 namespace aidl::android::hardware::gnss {
26 
27 struct GnssMeasurementInterface : public BnGnssMeasurementInterface {
28   public:
29     GnssMeasurementInterface();
30     ~GnssMeasurementInterface();
31     ndk::ScopedAStatus setCallback(const std::shared_ptr<IGnssMeasurementCallback>& callback,
32                                    const bool enableFullTracking,
33                                    const bool enableCorrVecOutputs) override;
34     ndk::ScopedAStatus close() override;
35 
36   private:
37     void start(const bool enableCorrVecOutputs);
38     void stop();
39     void reportMeasurement(const GnssData&);
40 
41     std::atomic<long> mMinIntervalMillis;
42     std::atomic<bool> mIsActive;
43     std::thread mThread;
44 
45     // Guarded by mMutex
46     static std::shared_ptr<IGnssMeasurementCallback> sCallback;
47 
48     // Synchronization lock for sCallback
49     mutable std::mutex mMutex;
50 };
51 
52 }  // namespace aidl::android::hardware::gnss
53