[sensors](CrOS/Linux) Rename SensorDeviceManager cc and h files.

device/generic_sensor/linux/platform_sensor_manager.cc

-// 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 "device/generic_sensor/linux/platform_sensor_manager.h"
-
-#include "base/strings/string_number_conversions.h"
-#include "base/threading/thread_restrictions.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "device/generic_sensor/linux/sensor_data_linux.h"
-
-namespace device {
-
-namespace {
-
-std::string StringOrEmptyIfNull(const char* value) {
-  return value ? value : std::string();
-}
-
-}  // namespace
-
-SensorDeviceManager::SensorDeviceManager()
-    : observer_(this),
-      delegate_(nullptr),
-      task_runner_(base::ThreadTaskRunnerHandle::Get()) {
-  thread_checker_.DetachFromThread();
-}
-
-SensorDeviceManager::~SensorDeviceManager() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-}
-
-void SensorDeviceManager::Start(Delegate* delegate) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-  DCHECK(!delegate_);
-
-  delegate_ = delegate;
-
-  DeviceMonitorLinux* monitor = DeviceMonitorLinux::GetInstance();
-  observer_.Add(monitor);
-  monitor->Enumerate(
-      base::Bind(&SensorDeviceManager::OnDeviceAdded, base::Unretained(this)));
-
-  task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&SensorDeviceManager::Delegate::OnSensorNodesEnumerated,
-                 base::Unretained(delegate_)));
-}
-
-std::string SensorDeviceManager::GetUdevDeviceGetSubsystem(udev_device* dev) {
-  return StringOrEmptyIfNull(udev_device_get_subsystem(dev));
-}
-
-std::string SensorDeviceManager::GetUdevDeviceGetSyspath(udev_device* dev) {
-  return StringOrEmptyIfNull(udev_device_get_syspath(dev));
-}
-
-std::string SensorDeviceManager::GetUdevDeviceGetSysattrValue(
-    udev_device* dev,
-    const std::string& attribute) {
-  return StringOrEmptyIfNull(
-      udev_device_get_sysattr_value(dev, attribute.c_str()));
-}
-
-std::string SensorDeviceManager::GetUdevDeviceGetDevnode(udev_device* dev) {
-  return StringOrEmptyIfNull(udev_device_get_devnode(dev));
-}
-
-void SensorDeviceManager::OnDeviceAdded(udev_device* dev) {
-  const std::string subsystem = GetUdevDeviceGetSubsystem(dev);
-  if (subsystem.empty() || subsystem.compare("iio") != 0)
-    return;
-
-  const std::string sysfs_path = GetUdevDeviceGetSyspath(dev);
-  if (sysfs_path.empty())
-    return;
-
-  const std::string device_node = GetUdevDeviceGetDevnode(dev);
-  if (device_node.empty())
-    return;
-
-  const uint32_t first = static_cast<uint32_t>(mojom::SensorType::FIRST);
-  const uint32_t last = static_cast<uint32_t>(mojom::SensorType::LAST);
-  for (uint32_t i = first; i < last; ++i) {
-    SensorPathsLinux data;
-    mojom::SensorType type = static_cast<mojom::SensorType>(i);
-    if (!InitSensorData(type, &data))
-      continue;
-
-    std::vector<base::FilePath> sensor_file_names;
-    for (const std::vector<std::string>& names : data.sensor_file_names) {
-      for (const auto& name : names) {
-        const std::string value =
-            GetUdevDeviceGetSysattrValue(dev, name.c_str());
-        if (value.empty())
-          continue;
-        base::FilePath full_path = base::FilePath(sysfs_path).Append(name);
-        sensor_file_names.push_back(full_path);
-        break;
-      }
-    }
-
-    if (sensor_file_names.empty())
-      continue;
-
-    const std::string scaling_value =
-        GetUdevDeviceGetSysattrValue(dev, data.sensor_scale_name.c_str());
-    // If scaling value is not found, treat it as 1.
-    double sensor_scaling_value = 1;
-    if (!scaling_value.empty())
-      base::StringToDouble(scaling_value, &sensor_scaling_value);
-
-    const std::string offset_vallue =
-        GetUdevDeviceGetSysattrValue(dev, data.sensor_offset_file_name.c_str());
-    // If offset value is not found, treat it as 0.
-    double sensor_offset_value = 0;
-    if (!offset_vallue.empty())
-      base::StringToDouble(offset_vallue, &sensor_offset_value);
-
-    const std::string frequency_value = GetUdevDeviceGetSysattrValue(
-        dev, data.sensor_frequency_file_name.c_str());
-    // If frequency is not found, use default one from SensorPathsLinux struct.
-    double sensor_frequency_value = data.default_configuration.frequency();
-    // By default, |reporting_mode| is ON_CHANGE. But if platform provides
-    // sampling frequency, the reporting mode is CONTINUOUS.
-    mojom::ReportingMode reporting_mode = mojom::ReportingMode::ON_CHANGE;
-    if (!frequency_value.empty()) {
-      base::StringToDouble(frequency_value, &sensor_frequency_value);
-      reporting_mode = mojom::ReportingMode::CONTINUOUS;
-    }
-
-    // Update own cache of known sensor devices.
-    if (!base::ContainsKey(sensors_by_node_, device_node))
-      sensors_by_node_[device_node] = data.type;
-
-    std::unique_ptr<SensorInfoLinux> device(new SensorInfoLinux(
-        device_node, sensor_frequency_value, sensor_scaling_value,
-        sensor_offset_value, reporting_mode, data.apply_scaling_func,
-        std::move(sensor_file_names)));
-    task_runner_->PostTask(
-        FROM_HERE, base::Bind(&SensorDeviceManager::Delegate::OnDeviceAdded,
-                              base::Unretained(delegate_), data.type,
-                              base::Passed(&device)));
-
-    // One |dev| can represent more than one sensor.
-    // For example, there is an accelerometer and gyroscope represented by one
-    // |dev| in Chrome OS, kernel < 3.18. Thus, iterate through all possible
-    // types of sensors.
-  }
-}
-
-void SensorDeviceManager::OnDeviceRemoved(udev_device* dev) {
-  const std::string subsystem = GetUdevDeviceGetSubsystem(dev);
-  if (subsystem.empty() || subsystem.compare("iio") != 0)
-    return;
-
-  const std::string device_node = GetUdevDeviceGetDevnode(dev);
-  if (device_node.empty())
-    return;
-
-  auto sensor = sensors_by_node_.find(device_node);
-  if (sensor == sensors_by_node_.end())
-    return;
-  mojom::SensorType type = sensor->second;
-  sensors_by_node_.erase(sensor);
-
-  task_runner_->PostTask(
-      FROM_HERE, base::Bind(&SensorDeviceManager::Delegate::OnDeviceRemoved,
-                            base::Unretained(delegate_), type, device_node));
-}
-
-}  // namespace device