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// Copyright 2017 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/usb/usb_service.h"
#include <list>
#include <unordered_map>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observer.h"
#include "device/base/device_monitor_win.h"
#include "device/usb/usb_device_win.h"
namespace device {
class UsbServiceWin : public DeviceMonitorWin::Observer, public UsbService {
public:
UsbServiceWin();
~UsbServiceWin() override;
private:
class BlockingTaskHelper;
// device::UsbService implementation
void GetDevices(const GetDevicesCallback& callback) override;
// device::DeviceMonitorWin::Observer implementation
void OnDeviceAdded(const GUID& class_guid,
const std::string& device_path) override;
void OnDeviceRemoved(const GUID& class_guid,
const std::string& device_path) override;
// Methods called by BlockingThreadHelper
void HelperStarted();
void CreateDeviceObject(const std::string& device_path,
const std::string& hub_path,
int port_number,
const std::string& driver_name);
void DeviceReady(scoped_refptr<UsbDeviceWin> device, bool success);
bool enumeration_ready() {
return helper_started_ && first_enumeration_countdown_ == 0;
}
// Enumeration callbacks are queued until an enumeration completes.
bool helper_started_ = false;
uint32_t first_enumeration_countdown_ = 0;
std::list<GetDevicesCallback> enumeration_callbacks_;
std::unique_ptr<BlockingTaskHelper> helper_;
std::unordered_map<std::string, scoped_refptr<UsbDeviceWin>> devices_by_path_;
ScopedObserver<DeviceMonitorWin, DeviceMonitorWin::Observer> device_observer_;
base::WeakPtrFactory<UsbServiceWin> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(UsbServiceWin);
};
} // namespace device
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