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// Copyright 2014 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_DEVICE_IMPL_H_
#define DEVICE_USB_USB_DEVICE_IMPL_H_
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/threading/thread_checker.h"
#include "device/usb/usb_descriptors.h"
#include "device/usb/usb_device.h"
struct libusb_device;
struct libusb_config_descriptor;
namespace base {
class SingleThreadTaskRunner;
}
namespace device {
class UsbDeviceHandleImpl;
class UsbContext;
typedef libusb_device* PlatformUsbDevice;
typedef libusb_config_descriptor* PlatformUsbConfigDescriptor;
class UsbDeviceImpl : public UsbDevice {
public:
// UsbDevice implementation:
#if defined(OS_CHROMEOS)
void RequestUsbAccess(
int interface_id,
const base::Callback<void(bool success)>& callback) override;
#endif // OS_CHROMEOS
scoped_refptr<UsbDeviceHandle> Open() override;
bool Close(scoped_refptr<UsbDeviceHandle> handle) override;
const UsbConfigDescriptor* GetConfiguration() override;
bool GetManufacturer(base::string16* manufacturer) override;
bool GetProduct(base::string16* product) override;
bool GetSerialNumber(base::string16* serial_number) override;
protected:
friend class UsbServiceImpl;
friend class UsbDeviceHandleImpl;
// Called by UsbServiceImpl only;
UsbDeviceImpl(scoped_refptr<UsbContext> context,
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
PlatformUsbDevice platform_device,
uint16 vendor_id,
uint16 product_id,
uint32 unique_id);
~UsbDeviceImpl() override;
// Called only by UsbServiceImpl.
void OnDisconnect();
// Called by UsbDeviceHandleImpl.
void RefreshConfiguration();
private:
base::ThreadChecker thread_checker_;
PlatformUsbDevice platform_device_;
// On Linux these properties are read from sysfs when the device is enumerated
// to avoid hitting the permission broker on Chrome OS for a real string
// descriptor request.
base::string16 manufacturer_;
base::string16 product_;
base::string16 serial_number_;
#if !defined(USE_UDEV)
// On other platforms the device must be opened in order to cache them. This
// should be delayed until the strings are needed to avoid poor interactions
// with other applications.
void CacheStrings();
bool strings_cached_;
#endif
#if defined(OS_CHROMEOS)
// On Chrome OS save the devnode string for requesting path access from
// permission broker.
std::string devnode_;
#endif
// The current device configuration descriptor. May be null if the device is
// in an unconfigured state.
scoped_ptr<UsbConfigDescriptor> configuration_;
// Retain the context so that it will not be released before UsbDevice.
scoped_refptr<UsbContext> context_;
// Opened handles.
typedef std::vector<scoped_refptr<UsbDeviceHandleImpl> > HandlesVector;
HandlesVector handles_;
// Reference to the UI thread for permission-broker calls.
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
DISALLOW_COPY_AND_ASSIGN(UsbDeviceImpl);
};
} // namespace device
#endif // DEVICE_USB_USB_DEVICE_IMPL_H_
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