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// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_
#define CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_
#pragma once
#include <set>
#include "base/basictypes.h"
#include "base/memory/linked_ptr.h"
#include "base/synchronization/lock.h"
#include "chrome/browser/extensions/api/api_resource.h"
#include "chrome/browser/usb/usb_device.h"
#include "chrome/common/extensions/api/experimental_usb.h"
class UsbDevice;
namespace net {
class IOBuffer;
} // namespace net
namespace extensions {
class APIResourceEventNotifier;
// A UsbDeviceResource is an APIResource wrapper for a UsbDevice. When invoking
// transfers on the underlying device it will use the APIResourceEventNotifier
// associated with the underlying APIResource to deliver completion messages.
class UsbDeviceResource : public APIResource {
public:
UsbDeviceResource(APIResourceEventNotifier* notifier, UsbDevice* device);
virtual ~UsbDeviceResource();
// All of the *Transfer variants that are exposed here adapt their arguments
// for the underlying UsbDevice's interface and invoke the corresponding
// methods with completion callbacks that call OnTransferComplete on the event
// notifier.
void ControlTransfer(
const api::experimental_usb::ControlTransferInfo& transfer);
void InterruptTransfer(
const api::experimental_usb::GenericTransferInfo& transfer);
void BulkTransfer(const api::experimental_usb::GenericTransferInfo& transfer);
void IsochronousTransfer(
const api::experimental_usb::IsochronousTransferInfo& transfer);
private:
// Invoked by the underlying device's transfer callbacks. Indicates transfer
// completion to the APIResource's event notifier.
void TransferComplete(net::IOBuffer* buffer, const size_t length,
UsbTransferStatus status);
scoped_refptr<UsbDevice> device_;
DISALLOW_COPY_AND_ASSIGN(UsbDeviceResource);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_
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