1  /*
2   * Copyright (C) 2017 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  #ifndef A_SENSOR_EVENT_QUEUE_H_
18  
19  #define A_SENSOR_EVENT_QUEUE_H_
20  
21  #include <aidl/android/frameworks/sensorservice/BnEventQueueCallback.h>
22  #include <aidl/android/frameworks/sensorservice/IEventQueue.h>
23  #include <aidl/sensors/convert.h>
24  #include <android-base/macros.h>
25  #include <android/binder_auto_utils.h>
26  #include <android/looper.h>
27  #include <android/sensor.h>
28  #include <utils/Mutex.h>
29  #include <utils/RefBase.h>
30  
31  #include <atomic>
32  
33  struct ALooper;
34  
35  struct ASensorEventQueue : public aidl::android::frameworks::sensorservice::BnEventQueueCallback {
36      using Event = aidl::android::hardware::sensors::Event;
37      using IEventQueue = aidl::android::frameworks::sensorservice::IEventQueue;
38  
39      ASensorEventQueue(
40              ALooper *looper,
41              ALooper_callbackFunc callback,
42              void *data);
43  
44      ndk::ScopedAStatus onEvent(const Event& event) override;
45  
46      void setImpl(const std::shared_ptr<IEventQueue>& queueImpl);
47  
48      int registerSensor(
49              ASensorRef sensor,
50              int32_t samplingPeriodUs,
51              int64_t maxBatchReportLatencyUs);
52  
53      int enableSensor(ASensorRef sensor);
54      int disableSensor(ASensorRef sensor);
55  
56      int setEventRate(ASensorRef sensor, int32_t samplingPeriodUs);
57  
58      int requestAdditionalInfoEvents(bool enable);
59  
60      ssize_t getEvents(ASensorEvent *events, size_t count);
61      int hasEvents() const;
62  
63      void dispatchCallback();
64  
65      void invalidate();
66  
67  private:
68      ALooper *mLooper;
69      ALooper_callbackFunc mCallback;
70      void *mData;
71      std::shared_ptr<IEventQueue> mQueueImpl;
72  
73      android::Mutex mLock;
74      std::vector<sensors_event_t> mQueue;
75  
76      std::atomic_bool mRequestAdditionalInfo;
77      android::Mutex mValidLock;
78      bool mValid;
79  
80      DISALLOW_COPY_AND_ASSIGN(ASensorEventQueue);
81  };
82  
83  #endif  // A_SENSOR_EVENT_QUEUE_H_
84  
85