/*
 * Copyright (C) 2012 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.
 */

#include <stdint.h>
#include <sys/types.h>

#include <utils/Singleton.h>

namespace android {
// ---------------------------------------------------------------------------

class BatteryService : public Singleton<BatteryService> {
    static const int TRANSACTION_noteStartSensor = IBinder::FIRST_CALL_TRANSACTION + 3;
    static const int TRANSACTION_noteStopSensor = IBinder::FIRST_CALL_TRANSACTION + 4;
    static const String16 DESCRIPTOR;

    friend class Singleton<BatteryService>;
    sp<IBinder> mBatteryStatService;

    BatteryService();
    status_t noteStartSensor(int uid, int handle);
    status_t noteStopSensor(int uid, int handle);

    void enableSensorImpl(uid_t uid, int handle);
    void disableSensorImpl(uid_t uid, int handle);
    void cleanupImpl(uid_t uid);

    struct Info {
        uid_t uid;
        int handle;
        int32_t count;
        Info()  : uid(0), handle(0), count(0) { }
        Info(uid_t uid, int handle) : uid(uid), handle(handle), count(0) { }
        bool operator < (const Info& rhs) const {
            return (uid == rhs.uid) ? (handle < rhs.handle) :  (uid < rhs.uid);
        }
    };

    Mutex mActivationsLock;
    SortedVector<Info> mActivations;
    bool addSensor(uid_t uid, int handle);
    bool removeSensor(uid_t uid, int handle);

public:
    static void enableSensor(uid_t uid, int handle) {
        BatteryService::getInstance().enableSensorImpl(uid, handle);
    }
    static void disableSensor(uid_t uid, int handle) {
        BatteryService::getInstance().disableSensorImpl(uid, handle);
    }
    static void cleanup(uid_t uid) {
        BatteryService::getInstance().cleanupImpl(uid);
    }
};

// ---------------------------------------------------------------------------
}; // namespace android