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