SensorDevice.h revision 4342fdf14ffb792a36c1de25ad14b745df628da2 
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_DEVICE_H
18#define ANDROID_SENSOR_DEVICE_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/KeyedVector.h>
24#include <utils/Singleton.h>
25#include <utils/String8.h>
26
27#include <gui/Sensor.h>
28
29// ---------------------------------------------------------------------------
30
31namespace android {
32// ---------------------------------------------------------------------------
33
34static const nsecs_t DEFAULT_EVENTS_PERIOD = 200000000; //    5 Hz
35
36class SensorDevice : public Singleton<SensorDevice> {
37    friend class Singleton<SensorDevice>;
38    struct sensors_poll_device_t* mSensorDevice;
39    struct sensors_module_t* mSensorModule;
40    mutable Mutex mLock; // protect mActivationCount[].rates
41    // fixed-size array after construction
42    struct Info {
43        Info() : delay(0) { }
44        KeyedVector<void*, nsecs_t> rates;
45        nsecs_t delay;
46        status_t setDelayForIdent(void* ident, int64_t ns);
47        nsecs_t selectDelay();
48    };
49    DefaultKeyedVector<int, Info> mActivationCount;
50
51    SensorDevice();
52public:
53    ssize_t getSensorList(sensor_t const** list);
54    status_t initCheck() const;
55    int getHalDeviceVersion() const;
56    ssize_t poll(sensors_event_t* buffer, size_t count);
57    status_t activate(void* ident, int handle, int enabled);
58    status_t setDelay(void* ident, int handle, int64_t ns);
59    void dump(String8& result, char* buffer, size_t SIZE);
60};
61
62// ---------------------------------------------------------------------------
63}; // namespace android
64
65#endif // ANDROID_SENSOR_DEVICE_H
66