2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_SENSOR_EVENT_QUEUE_H
18 #define ANDROID_SENSOR_EVENT_QUEUE_H
21 #include <sys/types.h>
23 #include <utils/Errors.h>
24 #include <utils/RefBase.h>
25 #include <utils/Timers.h>
27 #include <gui/BitTube.h>
29 // ----------------------------------------------------------------------------
34 // Concrete types for the NDK
35 struct ASensorEventQueue {
39 // ----------------------------------------------------------------------------
41 // ----------------------------------------------------------------------------
43 class ISensorEventConnection;
47 // ----------------------------------------------------------------------------
49 class SensorEventQueue : public ASensorEventQueue, public RefBase
53 enum { MAX_RECEIVE_BUFFER_EVENT_COUNT = 256 };
55 SensorEventQueue(const sp<ISensorEventConnection>& connection);
56 virtual ~SensorEventQueue();
57 virtual void onFirstRef();
61 static ssize_t write(const sp<BitTube>& tube,
62 ASensorEvent const* events, size_t numEvents);
64 ssize_t read(ASensorEvent* events, size_t numEvents);
66 status_t waitForEvent() const;
67 status_t wake() const;
69 status_t enableSensor(Sensor const* sensor) const;
70 status_t disableSensor(Sensor const* sensor) const;
71 status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
73 // these are here only to support SensorManager.java
74 status_t enableSensor(int32_t handle, int32_t samplingPeriodUs, int maxBatchReportLatencyUs,
75 int reservedFlags) const;
76 status_t disableSensor(int32_t handle) const;
77 status_t flush() const;
80 sp<Looper> getLooper() const;
81 sp<ISensorEventConnection> mSensorEventConnection;
82 sp<BitTube> mSensorChannel;
84 mutable sp<Looper> mLooper;
85 ASensorEvent* mRecBuffer;
90 // ----------------------------------------------------------------------------
91 }; // namespace android
93 #endif // ANDROID_SENSOR_EVENT_QUEUE_H