SensorEventQueue.h revision 7b5be95cb3903087742f1079fe89cddd8abe3696
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/BitTube.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; 45class Looper; 46 47// ---------------------------------------------------------------------------- 48 49class SensorEventQueue : public ASensorEventQueue, public RefBase 50{ 51public: 52 SensorEventQueue(const sp<ISensorEventConnection>& connection); 53 virtual ~SensorEventQueue(); 54 virtual void onFirstRef(); 55 56 int getFd() const; 57 58 static ssize_t write(const sp<BitTube>& tube, 59 ASensorEvent const* events, size_t numEvents); 60 61 ssize_t read(ASensorEvent* events, size_t numEvents); 62 63 status_t waitForEvent() const; 64 status_t wake() const; 65 66 status_t enableSensor(Sensor const* sensor) const; 67 status_t disableSensor(Sensor const* sensor) const; 68 status_t setEventRate(Sensor const* sensor, nsecs_t ns) const; 69 70 // these are here only to support SensorManager.java 71 status_t enableSensor(int32_t handle, int32_t us) const; 72 status_t disableSensor(int32_t handle) const; 73 74private: 75 sp<Looper> getLooper() const; 76 sp<ISensorEventConnection> mSensorEventConnection; 77 sp<BitTube> mSensorChannel; 78 mutable Mutex mLock; 79 mutable sp<Looper> mLooper; 80}; 81 82// ---------------------------------------------------------------------------- 83}; // namespace android 84 85#endif // ANDROID_SENSOR_EVENT_QUEUE_H 86