SensorEventQueue.cpp revision 589ce85ee4174829cfedce91b6b2509d2a4002eb
1589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian/* 2589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Copyright (C) 2010 The Android Open Source Project 3589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 4589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Licensed under the Apache License, Version 2.0 (the "License"); 5589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * you may not use this file except in compliance with the License. 6589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * You may obtain a copy of the License at 7589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 8589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * http://www.apache.org/licenses/LICENSE-2.0 9589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 10589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Unless required by applicable law or agreed to in writing, software 11589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * distributed under the License is distributed on an "AS IS" BASIS, 12589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * See the License for the specific language governing permissions and 14589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * limitations under the License. 15589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian */ 16589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <stdint.h> 17589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <sys/types.h> 18589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 19589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/Errors.h> 20589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/RefBase.h> 21589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 22589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/Sensor.h> 23589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/SensorChannel.h> 24589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/SensorEventQueue.h> 25589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/ISensorEventConnection.h> 26589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 27589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <android/sensor.h> 28589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 29589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 30589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopiannamespace android { 31589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 32589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 33589ce85ee4174829cfedce91b6b2509d2a4002ebMathias AgopianSensorEventQueue::SensorEventQueue(const sp<ISensorEventConnection>& connection) 34589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian : mSensorEventConnection(connection) 35589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 36589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 37589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 38589ce85ee4174829cfedce91b6b2509d2a4002ebMathias AgopianSensorEventQueue::~SensorEventQueue() 39589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 40589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 41589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 42589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianvoid SensorEventQueue::onFirstRef() 43589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 44589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian mSensorChannel = mSensorEventConnection->getSensorChannel(); 45589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 46589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 47589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianint SensorEventQueue::getFd() const 48589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 49589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorChannel->getFd(); 50589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 51589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 52589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianssize_t SensorEventQueue::write(ASensorEvent const* events, size_t numEvents) 53589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 54589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian ssize_t size = mSensorChannel->write(events, numEvents * sizeof(events[0])); 55589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size >= 0) { 56589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size % sizeof(events[0])) { 57589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // partial write!!! should never happen. 58589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return -EINVAL; 59589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 60589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // returns number of events written 61589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian size /= sizeof(events[0]); 62589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 63589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return size; 64589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 65589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 66589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianssize_t SensorEventQueue::read(ASensorEvent* events, size_t numEvents) 67589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 68589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian ssize_t size = mSensorChannel->read(events, numEvents*sizeof(events[0])); 69589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size >= 0) { 70589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size % sizeof(events[0])) { 71589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // partial write!!! should never happen. 72589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return -EINVAL; 73589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 74589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // returns number of events read 75589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian size /= sizeof(events[0]); 76589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 77589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return size; 78589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 79589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 80589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianstatus_t SensorEventQueue::enableSensor(Sensor const* sensor) const 81589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 82589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorEventConnection->enableDisable(sensor->getHandle(), true); 83589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 84589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 85589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianstatus_t SensorEventQueue::disableSensor(Sensor const* sensor) const 86589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 87589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorEventConnection->enableDisable(sensor->getHandle(), false); 88589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 89589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 90589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianstatus_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const 91589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 92589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorEventConnection->setEventRate(sensor->getHandle(), ns); 93589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 94589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 95589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 96589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian}; // namespace android 97589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 98