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1  /*
2   * Copyright (C) 2012 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  #include <stdint.h>
18  #include <sys/types.h>
19  
20  #include <batterystats/IBatteryStats.h>
21  #include <utils/Singleton.h>
22  #include <utils/SortedVector.h>
23  #include <utils/SystemClock.h>
24  
25  namespace android {
26  // ---------------------------------------------------------------------------
27  
28  class BatteryService : public Singleton<BatteryService> {
29      static constexpr int64_t WAKEUP_SENSOR_EVENT_DEBOUNCE_MS = 1000;
30  
31      friend class Singleton<BatteryService>;
32      sp<IBatteryStats> mBatteryStatService;
33  
34      BatteryService();
35  
36      void enableSensorImpl(uid_t uid, int handle);
37      void disableSensorImpl(uid_t uid, int handle);
38      void noteWakeupSensorEventImpl(int64_t elapsedNanos, uid_t uid, int handle);
39  
40      struct Info {
41          uid_t uid;
42          int handle;
43          int32_t count;
InfoInfo44          Info()  : uid(0), handle(0), count(0) { }
InfoInfo45          Info(uid_t uid, int handle) : uid(uid), handle(handle), count(0) { }
46          bool operator < (const Info& rhs) const {
47              return (uid == rhs.uid) ? (handle < rhs.handle) :  (uid < rhs.uid);
48          }
49      };
50  
51      int64_t mLastWakeupSensorEventReportedMs;
52      Mutex mActivationsLock;
53      SortedVector<Info> mActivations;
54      bool addSensor(uid_t uid, int handle);
55      bool removeSensor(uid_t uid, int handle);
56      bool checkService();
57  
58  public:
enableSensor(uid_t uid,int handle)59      static void enableSensor(uid_t uid, int handle) {
60          BatteryService::getInstance().enableSensorImpl(uid, handle);
61      }
disableSensor(uid_t uid,int handle)62      static void disableSensor(uid_t uid, int handle) {
63          BatteryService::getInstance().disableSensorImpl(uid, handle);
64      }
noteWakeupSensorEvent(int64_t elapsed,uid_t uid,int handle)65      static void noteWakeupSensorEvent(int64_t elapsed, uid_t uid, int handle) {
66          BatteryService& instance = BatteryService::getInstance();
67          const int64_t nowElapsedMs = elapsedRealtime();
68          if (nowElapsedMs >= (instance.mLastWakeupSensorEventReportedMs
69                                + WAKEUP_SENSOR_EVENT_DEBOUNCE_MS)) {
70              instance.noteWakeupSensorEventImpl(elapsed, uid, handle);
71              instance.mLastWakeupSensorEventReportedMs = nowElapsedMs;
72          }
73      }
74  };
75  
76  // ---------------------------------------------------------------------------
77  }; // namespace android
78  
79