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
  19 namespace base {
  20 class SingleThreadTaskRunner;
  21 }
  22
  23 namespace device {
  24
  25 class UsbDeviceHandleImpl;
  26 class UsbContext;
  27
  28 typedef libusb_device* PlatformUsbDevice;
  29 typedef libusb_config_descriptor* PlatformUsbConfigDescriptor;
  30
  31 class UsbDeviceImpl : public UsbDevice {
  32  public:
  33 // UsbDevice implementation:
  34 #if defined(OS_CHROMEOS)
  35   virtual void RequestUsbAccess(
  36       int interface_id,
  37       const base::Callback<void(bool success)>& callback) OVERRIDE;
  38 #endif  // OS_CHROMEOS
  39   virtual scoped_refptr<UsbDeviceHandle> Open() OVERRIDE;
  40   virtual bool Close(scoped_refptr<UsbDeviceHandle> handle) OVERRIDE;
  41   virtual const UsbConfigDescriptor& GetConfiguration() OVERRIDE;
  42
  43  protected:
  44   friend class UsbServiceImpl;
  45
  46   // Called by UsbServiceImpl only;
  47   UsbDeviceImpl(scoped_refptr<UsbContext> context,
  48                 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
  49                 PlatformUsbDevice platform_device,
  50                 uint16 vendor_id,
  51                 uint16 product_id,
  52                 uint32 unique_id);
  53
  54   virtual ~UsbDeviceImpl();
  55
  56   // Called only be UsbService.
  57   void OnDisconnect();
  58
  59  private:
  60   base::ThreadChecker thread_checker_;
  61   PlatformUsbDevice platform_device_;
  62
  63   // The active configuration descriptor is not read immediately but cached for
  64   // later use.
  65   bool current_configuration_cached_;
  66   UsbConfigDescriptor current_configuration_;
  67
  68   // Retain the context so that it will not be released before UsbDevice.
  69   scoped_refptr<UsbContext> context_;
  70
  71   // Opened handles.
  72   typedef std::vector<scoped_refptr<UsbDeviceHandleImpl> > HandlesVector;
  73   HandlesVector handles_;
  74
  75   // Reference to the UI thread for permission-broker calls.
  76   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(UsbDeviceImpl);
  79 };
  80
  81 }  // namespace device
  82
  83 #endif  // DEVICE_USB_USB_DEVICE_IMPL_H_