| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "services/device/generic_sensor/platform_sensor_linux.h" |
| |
| #include "base/single_thread_task_runner.h" |
| #include "services/device/generic_sensor/linux/sensor_data_linux.h" |
| #include "services/device/generic_sensor/platform_sensor_reader_linux.h" |
| |
| namespace device { |
| |
| namespace { |
| |
| // Checks if at least one value has been changed. |
| bool HaveValuesChanged(const SensorReading& lhs, const SensorReading& rhs) { |
| for (size_t i = 0; i < SensorReadingRaw::kValuesCount; ++i) { |
| if (lhs.raw.values[i] != rhs.raw.values[i]) |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| PlatformSensorLinux::PlatformSensorLinux( |
| mojom::SensorType type, |
| SensorReadingSharedBuffer* reading_buffer, |
| PlatformSensorProvider* provider, |
| const SensorInfoLinux* sensor_device, |
| scoped_refptr<base::SingleThreadTaskRunner> polling_thread_task_runner) |
| : PlatformSensor(type, reading_buffer, provider), |
| default_configuration_( |
| PlatformSensorConfiguration(sensor_device->device_frequency)), |
| reporting_mode_(sensor_device->reporting_mode), |
| polling_thread_task_runner_(std::move(polling_thread_task_runner)), |
| weak_factory_(this) { |
| sensor_reader_ = SensorReader::Create( |
| sensor_device, weak_factory_.GetWeakPtr(), task_runner_); |
| } |
| |
| PlatformSensorLinux::~PlatformSensorLinux() { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| polling_thread_task_runner_->DeleteSoon(FROM_HERE, sensor_reader_.release()); |
| } |
| |
| mojom::ReportingMode PlatformSensorLinux::GetReportingMode() { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| return reporting_mode_; |
| } |
| |
| void PlatformSensorLinux::UpdatePlatformSensorReading(SensorReading reading) { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| if (GetReportingMode() == mojom::ReportingMode::ON_CHANGE && |
| !HaveValuesChanged(reading, old_values_)) { |
| return; |
| } |
| old_values_ = reading; |
| reading.raw.timestamp = |
| (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF(); |
| UpdateSharedBufferAndNotifyClients(reading); |
| } |
| |
| void PlatformSensorLinux::NotifyPlatformSensorError() { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| NotifySensorError(); |
| } |
| |
| bool PlatformSensorLinux::StartSensor( |
| const PlatformSensorConfiguration& configuration) { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| polling_thread_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&SensorReader::StartFetchingData, |
| base::Unretained(sensor_reader_.get()), configuration)); |
| return true; |
| } |
| |
| void PlatformSensorLinux::StopSensor() { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| polling_thread_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&SensorReader::StopFetchingData, |
| base::Unretained(sensor_reader_.get()))); |
| } |
| |
| bool PlatformSensorLinux::CheckSensorConfiguration( |
| const PlatformSensorConfiguration& configuration) { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| return configuration.frequency() > 0 && |
| configuration.frequency() <= default_configuration_.frequency(); |
| } |
| |
| PlatformSensorConfiguration PlatformSensorLinux::GetDefaultConfiguration() { |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| return default_configuration_; |
| } |
| |
| } // namespace device |