SensorEventQueue.cpp revision 5c538053346107a8ec704d8769059ab6a23ebeef
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 */ 16a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 17a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian#define LOG_TAG "Sensors" 18a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 19d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza#include <algorithm> 20589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <stdint.h> 21589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <sys/types.h> 2256ae42613c91f6a6fb0dc3f626daa24666fd18c2Aravind Akella#include <sys/socket.h> 235c538053346107a8ec704d8769059ab6a23ebeefAravind Akella#include <linux/errno.h> 24589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 25589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/Errors.h> 26589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/RefBase.h> 2759abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown#include <utils/Looper.h> 28589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 29589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/Sensor.h> 305cae0d0699a169e468fff3e21165f35db12f2cdeMathias Agopian#include <gui/BitTube.h> 31589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/SensorEventQueue.h> 32589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/ISensorEventConnection.h> 33589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 34589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <android/sensor.h> 35589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 36d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stozausing std::min; 37d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza 38589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 39589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopiannamespace android { 40589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 41589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 42589ce85ee4174829cfedce91b6b2509d2a4002ebMathias AgopianSensorEventQueue::SensorEventQueue(const sp<ISensorEventConnection>& connection) 438a96955c8e14db40b16164236830fc9506a00872Aravind Akella : mSensorEventConnection(connection), mRecBuffer(NULL), mAvailable(0), mConsumed(0), 448a96955c8e14db40b16164236830fc9506a00872Aravind Akella mNumAcksToSend(0) { 4590ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian mRecBuffer = new ASensorEvent[MAX_RECEIVE_BUFFER_EVENT_COUNT]; 46589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 47589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 4890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias AgopianSensorEventQueue::~SensorEventQueue() { 4990ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian delete [] mRecBuffer; 50589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 51589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 52589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianvoid SensorEventQueue::onFirstRef() 53589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 54589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian mSensorChannel = mSensorEventConnection->getSensorChannel(); 55589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 56589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 57589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianint SensorEventQueue::getFd() const 58589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 59589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorChannel->getFd(); 60589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 61589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 627b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian 637b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopianssize_t SensorEventQueue::write(const sp<BitTube>& tube, 647b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian ASensorEvent const* events, size_t numEvents) { 657b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian return BitTube::sendObjects(tube, events, numEvents); 66589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 67589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 6890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopianssize_t SensorEventQueue::read(ASensorEvent* events, size_t numEvents) { 6990ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian if (mAvailable == 0) { 7090ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian ssize_t err = BitTube::recvObjects(mSensorChannel, 7190ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian mRecBuffer, MAX_RECEIVE_BUFFER_EVENT_COUNT); 7290ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian if (err < 0) { 7390ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian return err; 7490ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian } 75d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza mAvailable = static_cast<size_t>(err); 7690ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian mConsumed = 0; 7790ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian } 78d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza size_t count = min(numEvents, mAvailable); 79d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza memcpy(events, mRecBuffer + mConsumed, count * sizeof(ASensorEvent)); 8090ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian mAvailable -= count; 8190ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian mConsumed += count; 82d723bd7669b4fc88dc282d8bf8ba5ecb2849d22fDan Stoza return static_cast<ssize_t>(count); 83589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 84589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 8559abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brownsp<Looper> SensorEventQueue::getLooper() const 86589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 87a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian Mutex::Autolock _l(mLock); 8859abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown if (mLooper == 0) { 8959abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown mLooper = new Looper(true); 9059abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown mLooper->addFd(getFd(), getFd(), ALOOPER_EVENT_INPUT, NULL, NULL); 91a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian } 9259abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown return mLooper; 93589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 94589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 95a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::waitForEvent() const 96589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 97a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian const int fd = getFd(); 9859abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown sp<Looper> looper(getLooper()); 99aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian 10029267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian int events; 101aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian int32_t result; 102aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian do { 10329267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian result = looper->pollOnce(-1, NULL, &events, NULL); 10429267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian if (result == ALOOPER_POLL_ERROR) { 105e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("SensorEventQueue::waitForEvent error (errno=%d)", errno); 106aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian result = -EPIPE; // unknown error, so we make up one 107aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian break; 108aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian } 10929267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian if (events & ALOOPER_EVENT_HANGUP) { 11029267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian // the other-side has died 11129267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian ALOGE("SensorEventQueue::waitForEvent error HANGUP"); 11229267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian result = -EPIPE; // unknown error, so we make up one 11329267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian break; 11429267fe8495a74893dfce1bd9eceb6448df7abeaMathias Agopian } 115aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian } while (result != fd); 116aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian 1172ffb24799e579c47a73c992ab567f05c4bf0c962Mathias Agopian return (result == fd) ? status_t(NO_ERROR) : result; 118589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 119589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 120a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::wake() const 121589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 12259abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown sp<Looper> looper(getLooper()); 12359abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown looper->wake(); 124a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian return NO_ERROR; 125a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 126a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 127a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::enableSensor(Sensor const* sensor) const { 128724d91d778e71c8186399f4955de14b54812b3edAravind Akella return mSensorEventConnection->enableDisable(sensor->getHandle(), true, 0, 0, false); 129a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 130a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 131a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::disableSensor(Sensor const* sensor) const { 132724d91d778e71c8186399f4955de14b54812b3edAravind Akella return mSensorEventConnection->enableDisable(sensor->getHandle(), false, 0, 0, false); 133a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 134a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 135724d91d778e71c8186399f4955de14b54812b3edAravind Akellastatus_t SensorEventQueue::enableSensor(int32_t handle, int32_t samplingPeriodUs, 136724d91d778e71c8186399f4955de14b54812b3edAravind Akella int maxBatchReportLatencyUs, int reservedFlags) const { 137724d91d778e71c8186399f4955de14b54812b3edAravind Akella return mSensorEventConnection->enableDisable(handle, true, us2ns(samplingPeriodUs), 138724d91d778e71c8186399f4955de14b54812b3edAravind Akella us2ns(maxBatchReportLatencyUs), reservedFlags); 139724d91d778e71c8186399f4955de14b54812b3edAravind Akella} 140724d91d778e71c8186399f4955de14b54812b3edAravind Akella 141701166d9f60a6e1149ff568aec0e03f3f3925292Aravind Akellastatus_t SensorEventQueue::flush() const { 142701166d9f60a6e1149ff568aec0e03f3f3925292Aravind Akella return mSensorEventConnection->flush(); 143a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 144a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 145a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::disableSensor(int32_t handle) const { 146724d91d778e71c8186399f4955de14b54812b3edAravind Akella return mSensorEventConnection->enableDisable(handle, false, 0, 0, false); 147a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 148a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 149a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const { 150589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorEventConnection->setEventRate(sensor->getHandle(), ns); 151589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 152589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 153a9e6cc387072e25706a6d847a97b02a6f25a918bAravind Akellastatus_t SensorEventQueue::injectSensorEvent(const ASensorEvent& event) { 1545c538053346107a8ec704d8769059ab6a23ebeefAravind Akella do { 1555c538053346107a8ec704d8769059ab6a23ebeefAravind Akella // Blocking call. 1565c538053346107a8ec704d8769059ab6a23ebeefAravind Akella ssize_t size = ::send(mSensorChannel->getFd(), &event, sizeof(event), MSG_NOSIGNAL); 1575c538053346107a8ec704d8769059ab6a23ebeefAravind Akella if (size >= 0) { 1585c538053346107a8ec704d8769059ab6a23ebeefAravind Akella return NO_ERROR; 1595c538053346107a8ec704d8769059ab6a23ebeefAravind Akella } else if (size < 0 && errno == EAGAIN) { 1605c538053346107a8ec704d8769059ab6a23ebeefAravind Akella // If send is returning a "Try again" error, sleep for 100ms and try again. In all 1615c538053346107a8ec704d8769059ab6a23ebeefAravind Akella // other cases log a failure and exit. 1625c538053346107a8ec704d8769059ab6a23ebeefAravind Akella usleep(100000); 1635c538053346107a8ec704d8769059ab6a23ebeefAravind Akella } else { 1645c538053346107a8ec704d8769059ab6a23ebeefAravind Akella ALOGE("injectSensorEvent failure %s %zd", strerror(errno), size); 1655c538053346107a8ec704d8769059ab6a23ebeefAravind Akella return INVALID_OPERATION; 1665c538053346107a8ec704d8769059ab6a23ebeefAravind Akella } 1675c538053346107a8ec704d8769059ab6a23ebeefAravind Akella } while (true); 168a9e6cc387072e25706a6d847a97b02a6f25a918bAravind Akella} 169a9e6cc387072e25706a6d847a97b02a6f25a918bAravind Akella 1709a844cf78f09953145200b4074d47589257a408cAravind Akellavoid SensorEventQueue::sendAck(const ASensorEvent* events, int count) { 1719a844cf78f09953145200b4074d47589257a408cAravind Akella for (int i = 0; i < count; ++i) { 1729a844cf78f09953145200b4074d47589257a408cAravind Akella if (events[i].flags & WAKE_UP_SENSOR_EVENT_NEEDS_ACK) { 1738a96955c8e14db40b16164236830fc9506a00872Aravind Akella ++mNumAcksToSend; 1748a96955c8e14db40b16164236830fc9506a00872Aravind Akella } 1758a96955c8e14db40b16164236830fc9506a00872Aravind Akella } 1768a96955c8e14db40b16164236830fc9506a00872Aravind Akella // Send mNumAcksToSend to acknowledge for the wake up sensor events received. 1778a96955c8e14db40b16164236830fc9506a00872Aravind Akella if (mNumAcksToSend > 0) { 1788a96955c8e14db40b16164236830fc9506a00872Aravind Akella ssize_t size = ::send(mSensorChannel->getFd(), &mNumAcksToSend, sizeof(mNumAcksToSend), 1798a96955c8e14db40b16164236830fc9506a00872Aravind Akella MSG_DONTWAIT | MSG_NOSIGNAL); 1808a96955c8e14db40b16164236830fc9506a00872Aravind Akella if (size < 0) { 181f10c46ef855b6410b20ebd8b1351d4d78d8eca8eDan Stoza ALOGE("sendAck failure %zd %d", size, mNumAcksToSend); 1828a96955c8e14db40b16164236830fc9506a00872Aravind Akella } else { 1838a96955c8e14db40b16164236830fc9506a00872Aravind Akella mNumAcksToSend = 0; 1849a844cf78f09953145200b4074d47589257a408cAravind Akella } 1859a844cf78f09953145200b4074d47589257a408cAravind Akella } 1869a844cf78f09953145200b4074d47589257a408cAravind Akella return; 1879a844cf78f09953145200b4074d47589257a408cAravind Akella} 1889a844cf78f09953145200b4074d47589257a408cAravind Akella 189589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 190589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian}; // namespace android 191589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 192