Index: device/generic_sensor/linux/platform_sensor_manager.cc |
diff --git a/device/generic_sensor/linux/platform_sensor_manager.cc b/device/generic_sensor/linux/platform_sensor_manager.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..87fecca5d91ee6be38e7a94735709e5c465df66d |
--- /dev/null |
+++ b/device/generic_sensor/linux/platform_sensor_manager.cc |
@@ -0,0 +1,173 @@ |
+// 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 |