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 <future>
23 #include <mutex>
24 #include <thread>
25 #include "Utils.h"
26 
27 namespace aidl::android::hardware::gnss {
28 class Gnss;
29 
30 struct GnssMeasurementInterface : public BnGnssMeasurementInterface {
31   public:
32     GnssMeasurementInterface();
33     ~GnssMeasurementInterface();
34     ndk::ScopedAStatus setCallback(const std::shared_ptr<IGnssMeasurementCallback>& callback,
35                                    const bool enableFullTracking,
36                                    const bool enableCorrVecOutputs) override;
37     ndk::ScopedAStatus close() override;
38     ndk::ScopedAStatus setCallbackWithOptions(
39             const std::shared_ptr<IGnssMeasurementCallback>& callback,
40             const Options& options) override;
41     void setLocationInterval(const int intervalMs);
42     void setLocationEnabled(const bool enabled);
43     void setGnssInterface(const std::shared_ptr<Gnss>& gnss);
44 
45   private:
46     void start(const bool enableCorrVecOutputs, const bool enableFullTracking);
47     void stop();
48     void reportMeasurement(const GnssData&);
49     void waitForStoppingThreads();
50 
51     std::atomic<long> mIntervalMs;
52     std::atomic<long> mLocationIntervalMs;
53     std::atomic<bool> mIsActive;
54     std::atomic<bool> mLocationEnabled;
55     std::vector<std::thread> mThreads;
56     std::vector<std::future<void>> mFutures;
57     ::android::hardware::gnss::common::ThreadBlocker mThreadBlocker;
58 
59     // Guarded by mMutex
60     static std::shared_ptr<IGnssMeasurementCallback> sCallback;
61 
62     // Synchronization lock for sCallback
63     mutable std::mutex mMutex;
64 
65     std::shared_ptr<Gnss> mGnss;
66 };
67 
68 }  // namespace aidl::android::hardware::gnss
69