gnss/aidl/default/GnssBatching.h

/*
 * Copyright (C) 2021 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <aidl/android/hardware/gnss/BnGnssBatching.h>
#include <atomic>
#include <thread>

namespace aidl::android::hardware::gnss {

struct GnssBatching : public BnGnssBatching {
  public:
    GnssBatching();
    ~GnssBatching();
    ndk::ScopedAStatus init(const std::shared_ptr<IGnssBatchingCallback>& callback) override;
    ndk::ScopedAStatus getBatchSize(int* size) override;
    ndk::ScopedAStatus start(const Options& options) override;
    ndk::ScopedAStatus flush() override;
    ndk::ScopedAStatus stop() override;
    ndk::ScopedAStatus cleanup() override;

  private:
    void batchLocation(const GnssLocation&);

    // Guarded by mMutex
    static std::shared_ptr<IGnssBatchingCallback> sCallback;

    std::thread mThread;
    std::atomic<bool> mIsActive;
    std::atomic<long> mMinIntervalMs;
    std::atomic<float> mMinDistanceMeters;
    std::atomic<bool> mWakeUpOnFifoFull;

    // Synchronization lock for sCallback
    mutable std::mutex mMutex;

    std::vector<GnssLocation> mBatchedLocations;
};

}  // namespace aidl::android::hardware::gnss