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// Copyright 2014 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 DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_
#define DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_
#include <map>
#include <set>
#include <vector>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "device/usb/usb_device_handle.h"
#include "third_party/libusb/src/libusb/libusb.h"
namespace base {
class SequencedTaskRunner;
class SingleThreadTaskRunner;
class TaskRunner;
}
namespace net {
class IOBuffer;
}
namespace device {
struct EndpointMapValue {
int interface_number;
UsbTransferType transfer_type;
};
class UsbContext;
struct UsbConfigDescriptor;
class UsbDeviceImpl;
typedef libusb_device_handle* PlatformUsbDeviceHandle;
typedef libusb_iso_packet_descriptor* PlatformUsbIsoPacketDescriptor;
typedef libusb_transfer* PlatformUsbTransferHandle;
// UsbDeviceHandle class provides basic I/O related functionalities.
class UsbDeviceHandleImpl : public UsbDeviceHandle {
public:
scoped_refptr<UsbDevice> GetDevice() const override;
void Close() override;
void SetConfiguration(int configuration_value,
const ResultCallback& callback) override;
void ClaimInterface(int interface_number,
const ResultCallback& callback) override;
bool ReleaseInterface(int interface_number) override;
void SetInterfaceAlternateSetting(int interface_number,
int alternate_setting,
const ResultCallback& callback) override;
void ResetDevice(const ResultCallback& callback) override;
void ClearHalt(uint8_t endpoint, const ResultCallback& callback) override;
void ControlTransfer(UsbEndpointDirection direction,
TransferRequestType request_type,
TransferRecipient recipient,
uint8_t request,
uint16_t value,
uint16_t index,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int timeout,
const TransferCallback& callback) override;
void IsochronousTransfer(UsbEndpointDirection direction,
uint8_t endpoint_number,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int packets,
unsigned int packet_length,
unsigned int timeout,
const TransferCallback& callback) override;
void GenericTransfer(UsbEndpointDirection direction,
uint8_t endpoint_number,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int timeout,
const TransferCallback& callback) override;
bool FindInterfaceByEndpoint(uint8_t endpoint_address,
uint8_t* interface_number) override;
protected:
friend class UsbDeviceImpl;
// This constructor is called by UsbDeviceImpl.
UsbDeviceHandleImpl(
scoped_refptr<UsbContext> context,
scoped_refptr<UsbDeviceImpl> device,
PlatformUsbDeviceHandle handle,
scoped_refptr<base::SequencedTaskRunner> blocking_task_runner);
~UsbDeviceHandleImpl() override;
PlatformUsbDeviceHandle handle() const { return handle_; }
private:
class InterfaceClaimer;
class Transfer;
void SetConfigurationOnBlockingThread(int configuration_value,
const ResultCallback& callback);
void SetConfigurationComplete(bool success, const ResultCallback& callback);
void ClaimInterfaceOnBlockingThread(int interface_number,
const ResultCallback& callback);
void ClaimInterfaceComplete(int interface_number,
bool success,
const ResultCallback& callback);
void SetInterfaceAlternateSettingOnBlockingThread(
int interface_number,
int alternate_setting,
const ResultCallback& callback);
void SetInterfaceAlternateSettingComplete(int interface_number,
int alternate_setting,
bool success,
const ResultCallback& callback);
void ResetDeviceOnBlockingThread(const ResultCallback& callback);
void ClearHaltOnBlockingThread(uint8_t endpoint,
const ResultCallback& callback);
// Refresh endpoint_map_ after ClaimInterface, ReleaseInterface and
// SetInterfaceAlternateSetting.
void RefreshEndpointMap();
// Look up the claimed interface by endpoint. Return NULL if the interface
// of the endpoint is not found.
scoped_refptr<InterfaceClaimer> GetClaimedInterfaceForEndpoint(
uint8_t endpoint);
void ControlTransferInternal(
UsbEndpointDirection direction,
TransferRequestType request_type,
TransferRecipient recipient,
uint8_t request,
uint16_t value,
uint16_t index,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int timeout,
scoped_refptr<base::TaskRunner> callback_task_runner,
const TransferCallback& callback);
void IsochronousTransferInternal(
uint8_t endpoint_address,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int packets,
unsigned int packet_length,
unsigned int timeout,
scoped_refptr<base::TaskRunner> callback_task_runner,
const TransferCallback& callback);
void GenericTransferInternal(
uint8_t endpoint_address,
scoped_refptr<net::IOBuffer> buffer,
size_t length,
unsigned int timeout,
scoped_refptr<base::TaskRunner> callback_task_runner,
const TransferCallback& callback);
// Submits a transfer and starts tracking it. Retains the buffer and copies
// the completion callback until the transfer finishes, whereupon it invokes
// the callback then releases the buffer.
void SubmitTransfer(scoped_ptr<Transfer> transfer);
// Removes the transfer from the in-flight transfer set and invokes the
// completion callback.
void TransferComplete(Transfer* transfer, const base::Closure& callback);
// Informs the object to drop internal references.
void InternalClose();
scoped_refptr<UsbDeviceImpl> device_;
PlatformUsbDeviceHandle handle_;
typedef std::map<int, scoped_refptr<InterfaceClaimer>> ClaimedInterfaceMap;
ClaimedInterfaceMap claimed_interfaces_;
// This set holds weak pointers to pending transfers.
std::set<Transfer*> transfers_;
// A map from endpoints to EndpointMapValue
typedef std::map<int, EndpointMapValue> EndpointMap;
EndpointMap endpoint_map_;
// Retain the UsbContext so that the platform context will not be destroyed
// before this handle.
scoped_refptr<UsbContext> context_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
base::ThreadChecker thread_checker_;
DISALLOW_COPY_AND_ASSIGN(UsbDeviceHandleImpl);
};
} // namespace device
#endif // DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_
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