device/usb/usb_device_impl.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef DEVICE_USB_USB_DEVICE_IMPL_H_
   6 #define DEVICE_USB_USB_DEVICE_IMPL_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/threading/thread_checker.h"
  13 #include "device/usb/usb_descriptors.h"
  14 #include "device/usb/usb_device.h"
  15
  16 struct libusb_device;
  17 struct libusb_config_descriptor;
  18 struct libusb_device_handle;
  19
  20 namespace base {
  21 class SequencedTaskRunner;
  22 }
  23
  24 namespace device {
  25
  26 class UsbDeviceHandleImpl;
  27 class UsbContext;
  28
  29 typedef struct libusb_device* PlatformUsbDevice;
  30 typedef struct libusb_config_descriptor* PlatformUsbConfigDescriptor;
  31 typedef struct libusb_device_handle* PlatformUsbDeviceHandle;
  32
  33 class UsbDeviceImpl : public UsbDevice {
  34  public:
  35 // UsbDevice implementation:
  36 #if defined(OS_CHROMEOS)
  37   // Only overridden on Chrome OS.
  38   void CheckUsbAccess(const ResultCallback& callback) override;
  39   void RequestUsbAccess(int interface_id,
  40                         const ResultCallback& callback) override;
  41 #endif  // OS_CHROMEOS
  42   void Open(const OpenCallback& callback) override;
  43   bool Close(scoped_refptr<UsbDeviceHandle> handle) override;
  44   const UsbConfigDescriptor* GetConfiguration() override;
  45
  46  protected:
  47   friend class UsbServiceImpl;
  48   friend class UsbDeviceHandleImpl;
  49
  50   // Called by UsbServiceImpl only;
  51   UsbDeviceImpl(scoped_refptr<UsbContext> context,
  52                 PlatformUsbDevice platform_device,
  53                 uint16 vendor_id,
  54                 uint16 product_id,
  55                 const base::string16& manufacturer_string,
  56                 const base::string16& product_string,
  57                 const base::string16& serial_number,
  58                 const std::string& device_node,
  59                 scoped_refptr<base::SequencedTaskRunner> blocking_task_runner);
  60
  61   ~UsbDeviceImpl() override;
  62
  63   // Called only by UsbServiceImpl.
  64   PlatformUsbDevice platform_device() const { return platform_device_; }
  65   void set_visited(bool visited) { visited_ = visited; }
  66   bool was_visited() const { return visited_; }
  67   void OnDisconnect();
  68
  69   // Called by UsbDeviceHandleImpl.
  70   void RefreshConfiguration();
  71
  72  private:
  73   void OpenOnBlockingThread(const OpenCallback& callback);
  74   void Opened(PlatformUsbDeviceHandle platform_handle,
  75               const OpenCallback& callback);
  76
  77   base::ThreadChecker thread_checker_;
  78   PlatformUsbDevice platform_device_;
  79   bool visited_ = false;
  80
  81 #if defined(OS_CHROMEOS)
  82   // On Chrome OS save the devnode string for requesting path access from
  83   // permission broker.
  84   std::string devnode_;
  85 #endif
  86
  87   // The current device configuration descriptor. May be null if the device is
  88   // in an unconfigured state.
  89   scoped_ptr<UsbConfigDescriptor> configuration_;
  90
  91   // Retain the context so that it will not be released before UsbDevice.
  92   scoped_refptr<UsbContext> context_;
  93
  94   // Opened handles.
  95   typedef std::vector<scoped_refptr<UsbDeviceHandleImpl> > HandlesVector;
  96   HandlesVector handles_;
  97
  98   scoped_refptr<base::SequencedTaskRunner> task_runner_;
  99   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(UsbDeviceImpl);
 102 };
 103
 104 }  // namespace device
 105
 106 #endif  // DEVICE_USB_USB_DEVICE_IMPL_H_