360 lines
10 KiB
C++
360 lines
10 KiB
C++
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/SortedVector.h>
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#include <utils/KeyedVector.h>
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#include <utils/threads.h>
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#include <utils/Atomic.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <binder/BinderService.h>
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#include <gui/ISensorServer.h>
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#include <gui/ISensorEventConnection.h>
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#include <hardware/sensors.h>
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#include "SensorService.h"
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namespace android {
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// ---------------------------------------------------------------------------
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/*
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* TODO:
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* - handle per-connection event rate
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* - filter events per connection
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* - make sure to keep the last value of each event type so we can quickly
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* send something to application when they enable a sensor that is already
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* active (the issue here is that it can take time before a value is
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* produced by the h/w if the rate is low or if it's a one-shot sensor).
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*/
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SensorService::SensorService()
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: Thread(false),
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mDump("android.permission.DUMP")
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{
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}
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void SensorService::onFirstRef()
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{
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status_t err = hw_get_module(SENSORS_HARDWARE_MODULE_ID,
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(hw_module_t const**)&mSensorModule);
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LOGE_IF(err, "couldn't load %s module (%s)",
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SENSORS_HARDWARE_MODULE_ID, strerror(-err));
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err = sensors_open(&mSensorModule->common, &mSensorDevice);
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LOGE_IF(err, "couldn't open device for module %s (%s)",
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SENSORS_HARDWARE_MODULE_ID, strerror(-err));
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LOGD("nuSensorService starting...");
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struct sensor_t const* list;
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int count = mSensorModule->get_sensors_list(mSensorModule, &list);
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for (int i=0 ; i<count ; i++) {
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Sensor sensor(list + i);
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LOGI("%s", sensor.getName().string());
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mSensorList.add(sensor);
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mSensorDevice->activate(mSensorDevice, sensor.getHandle(), 0);
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}
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run("SensorService", PRIORITY_URGENT_DISPLAY);
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}
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SensorService::~SensorService()
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{
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}
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status_t SensorService::dump(int fd, const Vector<String16>& args)
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{
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const size_t SIZE = 1024;
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char buffer[SIZE];
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String8 result;
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if (!mDump.checkCalling()) {
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snprintf(buffer, SIZE, "Permission Denial: "
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"can't dump SurfaceFlinger from pid=%d, uid=%d\n",
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IPCThreadState::self()->getCallingPid(),
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IPCThreadState::self()->getCallingUid());
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result.append(buffer);
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} else {
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Mutex::Autolock _l(mLock);
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snprintf(buffer, SIZE, "%d connections / %d active\n",
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mConnections.size(), mActiveConnections.size());
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result.append(buffer);
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snprintf(buffer, SIZE, "Active sensors:\n");
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result.append(buffer);
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for (size_t i=0 ; i<mActiveSensors.size() ; i++) {
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snprintf(buffer, SIZE, "handle=%d, connections=%d\n",
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mActiveSensors.keyAt(i),
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mActiveSensors.valueAt(i)->getNumConnections());
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result.append(buffer);
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}
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}
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write(fd, result.string(), result.size());
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return NO_ERROR;
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}
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bool SensorService::threadLoop()
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{
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LOGD("nuSensorService thread starting...");
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sensors_event_t buffer[16];
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struct sensors_poll_device_t* device = mSensorDevice;
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ssize_t count;
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do {
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count = device->poll(device, buffer, sizeof(buffer)/sizeof(*buffer));
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if (count<0) {
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LOGE("sensor poll failed (%s)", strerror(-count));
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break;
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}
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const SortedVector< wp<SensorEventConnection> > activeConnections(
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getActiveConnections());
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size_t numConnections = activeConnections.size();
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if (numConnections) {
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for (size_t i=0 ; i<numConnections ; i++) {
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sp<SensorEventConnection> connection(activeConnections[i].promote());
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if (connection != 0) {
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connection->sendEvents(buffer, count);
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}
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}
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}
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} while (count >= 0 || Thread::exitPending());
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LOGW("Exiting SensorService::threadLoop!");
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return false;
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}
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SortedVector< wp<SensorService::SensorEventConnection> >
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SensorService::getActiveConnections() const
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{
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Mutex::Autolock _l(mLock);
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return mActiveConnections;
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}
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Vector<Sensor> SensorService::getSensorList()
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{
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return mSensorList;
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}
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sp<ISensorEventConnection> SensorService::createSensorEventConnection()
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{
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sp<SensorEventConnection> result(new SensorEventConnection(this));
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Mutex::Autolock _l(mLock);
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mConnections.add(result);
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return result;
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}
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void SensorService::cleanupConnection(const wp<SensorEventConnection>& connection)
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{
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Mutex::Autolock _l(mLock);
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ssize_t index = mConnections.indexOf(connection);
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if (index >= 0) {
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size_t size = mActiveSensors.size();
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for (size_t i=0 ; i<size ; ) {
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SensorRecord* rec = mActiveSensors.valueAt(i);
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if (rec && rec->removeConnection(connection)) {
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mSensorDevice->activate(mSensorDevice, mActiveSensors.keyAt(i), 0);
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mActiveSensors.removeItemsAt(i, 1);
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delete rec;
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size--;
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} else {
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i++;
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}
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}
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mActiveConnections.remove(connection);
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mConnections.removeItemsAt(index, 1);
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}
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}
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status_t SensorService::enable(const sp<SensorEventConnection>& connection,
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int handle)
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{
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status_t err = NO_ERROR;
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Mutex::Autolock _l(mLock);
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SensorRecord* rec = mActiveSensors.valueFor(handle);
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if (rec == 0) {
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rec = new SensorRecord(connection);
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mActiveSensors.add(handle, rec);
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err = mSensorDevice->activate(mSensorDevice, handle, 1);
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LOGE_IF(err, "Error activating sensor %d (%s)", handle, strerror(-err));
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} else {
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err = rec->addConnection(connection);
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}
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if (err == NO_ERROR) {
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// connection now active
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connection->addSensor(handle);
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if (mActiveConnections.indexOf(connection) < 0) {
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mActiveConnections.add(connection);
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}
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}
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return err;
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}
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status_t SensorService::disable(const sp<SensorEventConnection>& connection,
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int handle)
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{
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status_t err = NO_ERROR;
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Mutex::Autolock _l(mLock);
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SensorRecord* rec = mActiveSensors.valueFor(handle);
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LOGW("sensor (handle=%d) is not enabled", handle);
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if (rec) {
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// see if this connection becomes inactive
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connection->removeSensor(handle);
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if (connection->hasAnySensor() == false) {
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mActiveConnections.remove(connection);
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}
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// see if this sensor becomes inactive
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if (rec->removeConnection(connection)) {
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mActiveSensors.removeItem(handle);
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delete rec;
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err = mSensorDevice->activate(mSensorDevice, handle, 0);
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}
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}
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return err;
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}
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status_t SensorService::setRate(const sp<SensorEventConnection>& connection,
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int handle, nsecs_t ns)
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{
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status_t err = NO_ERROR;
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Mutex::Autolock _l(mLock);
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err = mSensorDevice->setDelay(mSensorDevice, handle, ns);
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// TODO: handle rate per connection
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return err;
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}
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// ---------------------------------------------------------------------------
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SensorService::SensorRecord::SensorRecord(
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const sp<SensorEventConnection>& connection)
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{
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mConnections.add(connection);
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}
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status_t SensorService::SensorRecord::addConnection(
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const sp<SensorEventConnection>& connection)
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{
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if (mConnections.indexOf(connection) < 0) {
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mConnections.add(connection);
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}
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return NO_ERROR;
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}
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bool SensorService::SensorRecord::removeConnection(
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const wp<SensorEventConnection>& connection)
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{
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ssize_t index = mConnections.indexOf(connection);
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if (index >= 0) {
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mConnections.removeItemsAt(index, 1);
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}
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return mConnections.size() ? false : true;
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}
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// ---------------------------------------------------------------------------
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SensorService::SensorEventConnection::SensorEventConnection(
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const sp<SensorService>& service)
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: mService(service), mChannel(new SensorChannel())
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{
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}
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SensorService::SensorEventConnection::~SensorEventConnection()
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{
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mService->cleanupConnection(this);
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}
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void SensorService::SensorEventConnection::onFirstRef()
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{
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}
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void SensorService::SensorEventConnection::addSensor(int32_t handle) {
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if (mSensorList.indexOf(handle) <= 0) {
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mSensorList.add(handle);
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}
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}
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void SensorService::SensorEventConnection::removeSensor(int32_t handle) {
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mSensorList.remove(handle);
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}
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bool SensorService::SensorEventConnection::hasSensor(int32_t handle) const {
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return mSensorList.indexOf(handle) >= 0;
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}
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bool SensorService::SensorEventConnection::hasAnySensor() const {
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return mSensorList.size() ? true : false;
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}
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status_t SensorService::SensorEventConnection::sendEvents(
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sensors_event_t const* buffer, size_t count)
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{
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// TODO: we should only send the events for the sensors this connection
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// is registered for.
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ssize_t size = mChannel->write(buffer, count*sizeof(sensors_event_t));
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if (size == -EAGAIN) {
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// the destination doesn't accept events anymore, it's probably
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// full. For now, we just drop the events on the floor.
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LOGW("dropping %d events on the floor", count);
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return size;
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}
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LOGE_IF(size<0, "dropping %d events on the floor (%s)",
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count, strerror(-size));
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return size < 0 ? size : NO_ERROR;
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}
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sp<SensorChannel> SensorService::SensorEventConnection::getSensorChannel() const
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{
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return mChannel;
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}
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status_t SensorService::SensorEventConnection::enableDisable(
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int handle, bool enabled)
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{
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status_t err;
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if (enabled) {
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err = mService->enable(this, handle);
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} else {
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err = mService->disable(this, handle);
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}
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return err;
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}
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status_t SensorService::SensorEventConnection::setEventRate(
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int handle, nsecs_t ns)
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{
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return mService->setRate(this, handle, ns);
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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