1 /*
2  * Copyright (C) 2021 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/BnGnssNavigationMessageInterface.h>
20 #include <atomic>
21 #include <future>
22 #include <thread>
23 #include "Utils.h"
24 
25 namespace aidl::android::hardware::gnss {
26 
27 struct GnssNavigationMessageInterface : public BnGnssNavigationMessageInterface {
28   public:
29     GnssNavigationMessageInterface();
30     ~GnssNavigationMessageInterface();
31     ndk::ScopedAStatus setCallback(
32             const std::shared_ptr<IGnssNavigationMessageCallback>& callback) override;
33     ndk::ScopedAStatus close() override;
34 
35   private:
36     void start();
37     void stop();
38     void reportMessage(const IGnssNavigationMessageCallback::GnssNavigationMessage& message);
39     void waitForStoppingThreads();
40 
41     std::atomic<long> mMinIntervalMillis;
42     std::atomic<bool> mIsActive;
43     std::vector<std::thread> mThreads;
44     std::vector<std::future<void>> mFutures;
45     ::android::hardware::gnss::common::ThreadBlocker mThreadBlocker;
46 
47     // Guarded by mMutex
48     static std::shared_ptr<IGnssNavigationMessageCallback> sCallback;
49     // Synchronization lock for sCallback
50     mutable std::mutex mMutex;
51 };
52 
53 }  // namespace aidl::android::hardware::gnss
54