SensorEventQueue.h revision 589ce85ee4174829cfedce91b6b2509d2a4002eb 
1/*
2 * Copyright (C) 2010 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 ANDROID_SENSOR_EVENT_QUEUE_H
18#define ANDROID_SENSOR_EVENT_QUEUE_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/Errors.h>
24#include <utils/RefBase.h>
25#include <utils/Timers.h>
26
27#include <gui/SensorChannel.h>
28
29// ----------------------------------------------------------------------------
30
31struct ALooper;
32struct ASensorEvent;
33
34// Concrete types for the NDK
35struct ASensorEventQueue {
36    ALooper* looper;
37};
38
39// ----------------------------------------------------------------------------
40namespace android {
41// ----------------------------------------------------------------------------
42
43class ISensorEventConnection;
44class Sensor;
45
46// ----------------------------------------------------------------------------
47
48class SensorEventQueue : public ASensorEventQueue, public RefBase
49{
50public:
51            SensorEventQueue(const sp<ISensorEventConnection>& connection);
52    virtual ~SensorEventQueue();
53    virtual void onFirstRef();
54
55    int getFd() const;
56    ssize_t write(ASensorEvent const* events, size_t numEvents);
57    ssize_t read(ASensorEvent* events, size_t numEvents);
58
59    status_t enableSensor(Sensor const* sensor) const;
60    status_t disableSensor(Sensor const* sensor) const;
61    status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
62
63private:
64    sp<ISensorEventConnection> mSensorEventConnection;
65    sp<SensorChannel> mSensorChannel;
66};
67
68// ----------------------------------------------------------------------------
69}; // namespace android
70
71#endif // ANDROID_SENSOR_EVENT_QUEUE_H
72