1 // Copyright 2013 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 6 #ifndef CHROME_BROWSER_USB_USB_DEVICE_H_ 7 #define CHROME_BROWSER_USB_USB_DEVICE_H_ 8 9 #include <vector> 10 11 #include "base/basictypes.h" 12 #include "base/memory/ref_counted.h" 13 #include "base/threading/thread_checker.h" 14 #include "chrome/browser/usb/usb_interface.h" 15 16 struct libusb_device; 17 class UsbDeviceHandle; 18 class UsbContext; 19 20 typedef libusb_device* PlatformUsbDevice; 21 22 // A UsbDevice object represents a detected USB device, providing basic 23 // information about it. For further manipulation of the device, a 24 // UsbDeviceHandle must be created from Open() method. 25 class UsbDevice : public base::RefCountedThreadSafe<UsbDevice> { 26 public: 27 // Accessors to basic information. 28 PlatformUsbDevice platform_device() const { return platform_device_; } 29 uint16 vendor_id() const { return vendor_id_; } 30 uint16 product_id() const { return product_id_; } 31 32 // Creates a UsbDeviceHandle for further manipulation. 33 // Blocking method. Must be called on FILE thread. 34 virtual scoped_refptr<UsbDeviceHandle> Open(); 35 36 // Explicitly closes a device handle. This method will be automatically called 37 // by the destructor of a UsbDeviceHandle as well. 38 // Closing a closed handle is a safe 39 // Blocking method. Must be called on FILE thread. 40 virtual bool Close(scoped_refptr<UsbDeviceHandle> handle); 41 42 // Lists the interfaces provided by the device and fills the given 43 // UsbConfigDescriptor. 44 // Blocking method. Must be called on FILE thread. 45 virtual bool ListInterfaces(UsbConfigDescriptor* config); 46 47 protected: 48 friend class UsbService; 49 friend class base::RefCountedThreadSafe<UsbDevice>; 50 51 // Called by UsbService only; 52 UsbDevice(scoped_refptr<UsbContext> context, 53 PlatformUsbDevice platform_device, 54 uint16 vendor_id, 55 uint16 product_id); 56 57 // Constructor called in test only. 58 UsbDevice(); 59 virtual ~UsbDevice(); 60 61 // Called only be UsbService. 62 virtual void OnDisconnect(); 63 64 private: 65 PlatformUsbDevice platform_device_; 66 uint16 vendor_id_; 67 uint16 product_id_; 68 69 // Retain the context so that it will not be released before UsbDevice. 70 scoped_refptr<UsbContext> context_; 71 72 // Opened handles. 73 typedef std::vector<scoped_refptr<UsbDeviceHandle> > HandlesVector; 74 HandlesVector handles_; 75 76 base::ThreadChecker thread_checker_; 77 78 DISALLOW_COPY_AND_ASSIGN(UsbDevice); 79 }; 80 81 #endif // CHROME_BROWSER_USB_USB_DEVICE_H_ 82
