| // 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. |
| |
| #ifndef DEVICE_USB_USB_SERVICE_LINUX_H_ |
| #define DEVICE_USB_USB_SERVICE_LINUX_H_ |
| |
| #include <list> |
| #include <memory> |
| #include <unordered_map> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/sequenced_task_runner.h" |
| #include "device/usb/usb_service.h" |
| |
| namespace device { |
| |
| struct UsbDeviceDescriptor; |
| class UsbDeviceLinux; |
| |
| class UsbServiceLinux : public UsbService { |
| public: |
| UsbServiceLinux(); |
| ~UsbServiceLinux() override; |
| |
| // device::UsbService implementation |
| void GetDevices(const GetDevicesCallback& callback) override; |
| |
| private: |
| using DeviceMap = |
| std::unordered_map<std::string, scoped_refptr<UsbDeviceLinux>>; |
| |
| class BlockingTaskRunnerHelper; |
| |
| void OnDeviceAdded(const std::string& device_path, |
| const UsbDeviceDescriptor& descriptor, |
| const std::string& manufacturer, |
| const std::string& product, |
| const std::string& serial_number, |
| uint8_t active_configuration, |
| uint32_t bus_number, uint32_t port_number); |
| void DeviceReady(scoped_refptr<UsbDeviceLinux> device, bool success); |
| void OnDeviceRemoved(const std::string& device_path); |
| void HelperStarted(); |
| |
| bool enumeration_ready() { |
| return helper_started_ && first_enumeration_countdown_ == 0; |
| } |
| |
| // |helper_started_| is set once OnDeviceAdded has been called for all devices |
| // initially found on the system. |first_enumeration_countdown_| is then |
| // decremented as DeviceReady is called for these devices. |
| // |enumeration_callbacks_| holds the callbacks passed to GetDevices before |
| // this process completes and the device list is ready. |
| bool helper_started_ = false; |
| uint32_t first_enumeration_countdown_ = 0; |
| std::list<GetDevicesCallback> enumeration_callbacks_; |
| |
| scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_; |
| std::unique_ptr<BlockingTaskRunnerHelper, base::OnTaskRunnerDeleter> helper_; |
| DeviceMap devices_by_path_; |
| |
| base::WeakPtrFactory<UsbServiceLinux> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(UsbServiceLinux); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_USB_USB_SERVICE_LINUX_H_ |