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 COMPONENTS_USB_SERVICE_USB_SERVICE_H_ 6 #define COMPONENTS_USB_SERVICE_USB_SERVICE_H_ 7 8 #include <vector> 9 10 #include "base/memory/ref_counted.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/threading/non_thread_safe.h" 13 #include "components/usb_service/usb_service_export.h" 14 15 namespace usb_service { 16 17 class UsbDevice; 18 19 // The USB service handles creating and managing an event handler thread that is 20 // used to manage and dispatch USB events. It is also responsible for device 21 // discovery on the system, which allows it to re-use device handles to prevent 22 // competition for the same USB device. 23 class USB_SERVICE_EXPORT UsbService : public base::NonThreadSafe { 24 public: 25 // Must be called on FILE thread. 26 // Returns NULL when failed to initialized. 27 static UsbService* GetInstance(); 28 29 static void SetInstanceForTest(UsbService* instance); 30 31 virtual scoped_refptr<UsbDevice> GetDeviceById(uint32 unique_id) = 0; 32 33 // Get all of the devices attached to the system, inserting them into 34 // |devices|. Clears |devices| before use. The result will be sorted by id 35 // in increasing order. Must be called on FILE thread. 36 virtual void GetDevices(std::vector<scoped_refptr<UsbDevice> >* devices) = 0; 37 38 protected: 39 friend struct base::DefaultDeleter<UsbService>; 40 UsbService() {} 41 virtual ~UsbService() {} 42 DISALLOW_COPY_AND_ASSIGN(UsbService); 43 }; 44 45 } // namespace usb_service 46 47 #endif // COMPONENTS_USB_SERVICE_USB_SERVICE_H_ 48
