Represents a device (real or not). More...

#include <Device.hpp>

Classes
struct	DelayPeriod

Public Member Functions
	Device (std::nullptr_t) noexcept
	Construct invalid device.

	Device ()
	Default constructor.

	Device (int fd)
	Construct form a device file descriptor.

	Device (const std::filesystem::path &filename, int flags=O_RDONLY\|O_NONBLOCK)
	Construct from a device file path.

	~Device () noexcept

void	create ()
	Create a new instance, in-place.

void	create (int fd)
	Construct form a device file descriptor, in-place.

void	create (const std::filesystem::path &filename, int flags=O_RDONLY\|O_NONBLOCK)
	Construct from a device file path, in-place.

void	destroy () noexcept override
	free all allocated resources and make the instance invalid.

	Device (Device &&other) noexcept
	Move constructor.

Device &	operator= (Device &&other) noexcept
	Move assignment.

void	acquire (libevdev *new_raw, int new_fd) noexcept

void	acquire (state_type new_state) noexcept

state_type	release () noexcept

void	grab ()
	Grab the device through a `EVIOCGRAB` syscall.

void	ungrab ()
	Ungrab the device.

void	set_fd (int fd)
	Set a file descriptor and read the device metadata.

void	change_fd (int fd)
	Change the file descriptor used internally, without re-reading the actual device.

int	get_fd () const
	Return the internal file descriptor used to access the device file.

void	open (const std::filesystem::path &filename, int flags=O_RDONLY\|O_NONBLOCK)
	Open a device file and set it for the device.

bool	is_open () const noexcept
	Check if a file was opened with open().

void	set_nonblock (bool enable)
	Set the owned file handle's `O_NONBLOCK` flag.

bool	get_nonblock () const
	Get the owned file handle's `O_NONBLOCK` flag.

virtual void	log (LogLevel priority, const char file, int line, const char func, const char *format, std::va_list args) const noexcept

std::string	get_name () const

std::optional< std::string >	get_phys () const

std::optional< std::string >	get_uniq () const

std::uint16_t	get_product () const noexcept

std::uint16_t	get_vendor () const noexcept

std::uint16_t	get_bustype () const noexcept

std::uint16_t	get_version () const noexcept

int	get_driver_version () const noexcept

bool	has (Property prop) const noexcept

bool	has (Type type) const noexcept

bool	has (Type type, Code code) const noexcept

bool	has (const TypeCode &tc) const noexcept

int	get_abs_min (Code code) const noexcept

int	get_abs_max (Code code) const noexcept

int	get_abs_fuzz (Code code) const noexcept

int	get_abs_flat (Code code) const noexcept

int	get_abs_res (Code code) const noexcept

AbsInfo	get_abs_info (Code code) const

int	get_value (Type type, Code code) const noexcept

int	get_value (const TypeCode &tc) const noexcept

std::optional< int >	try_get_value (Type type, Code code) const noexcept

std::optional< int >	try_get_value (const TypeCode &tc) const noexcept

bool	get_repeat (int &delay, int &period) const noexcept

std::optional< DelayPeriod >	try_get_repeat () const noexcept

int	get_slot (unsigned slot, Code code) const noexcept

std::optional< int >	try_get_slot (unsigned slot, Code code) const noexcept

int	get_num_slots () const

std::optional< int >	try_get_num_slots () const noexcept

int	get_current_slot () const noexcept

void	set_name (const std::string &name) noexcept

void	set_phys (const std::string &phys) noexcept

void	set_uniq (const std::string &uniq) noexcept

void	set_product (std::uint16_t pid) noexcept

void	set_vendor (std::uint16_t vid) noexcept

void	set_bustype (std::uint16_t bus) noexcept

void	set_version (std::uint16_t ver) noexcept

void	enable (Property prop)

void	disable (Property prop)

void	set_value (Type type, Code code, int value)

void	set_value (const TypeCode &tc, int value)

void	set_slot (unsigned slot, Code code, int value)

void	set_abs_min (Code code, int val) noexcept

void	set_abs_max (Code code, int val) noexcept

void	set_abs_fuzz (Code code, int val) noexcept

void	set_abs_flat (Code code, int val) noexcept

void	set_abs_res (Code code, int val) noexcept

void	set_abs_info (Code code, const AbsInfo &abs) noexcept

void	enable (Type type)

void	disable (Type type)

void	enable (Type type, Code code)

void	enable (const TypeCode &tc)

void	enable_abs (Code code, const AbsInfo &info)

void	enable_rep (Code code, int arg)

void	disable (Type type, Code code)

void	disable (const TypeCode &tc)

void	set_kernel_abs_info (Code code, const AbsInfo &abs)

void	set_kernel_led_value (Code code, libevdev_led_value value)

void	set_clock_id (int clockid)

Event	read (ReadFlag flags=ReadFlag::normal)

ReadStatus	read (Event &event, ReadFlag flags=ReadFlag::normal) noexcept

bool	has_pending ()

std::vector< Property >	get_properties () const

std::vector< Type >	get_types () const

std::vector< Code >	get_codes (Type type) const

std::vector< Code >	get_codes (Type type, Code max) const

void	enable_key (Code code)

void	enable_rel (Code code)

void	enable_abs (Code code)

Public Member Functions inherited from basic_wrapper< libevdev * >
constexpr	basic_wrapper () noexcept=default

constexpr	basic_wrapper (libevdev *src) noexcept

constexpr	basic_wrapper (basic_wrapper &&other) noexcept
	Move constructor.

basic_wrapper &	operator= (basic_wrapper &&other) noexcept
	Move assignment.

bool	is_valid () const noexcept

	operator bool () const noexcept

raw_type	data () noexcept

const raw_type	data () const noexcept

void	acquire (state_type new_state) noexcept

state_type	release () noexcept

constexpr	basic_wrapper () noexcept=default

constexpr	basic_wrapper (libevdev *src) noexcept

constexpr	basic_wrapper (basic_wrapper &&other) noexcept
	Move constructor.

basic_wrapper &	operator= (basic_wrapper &&other) noexcept
	Move assignment.

bool	is_valid () const noexcept

	operator bool () const noexcept

raw_type	data () noexcept

const raw_type	data () const noexcept

void	acquire (state_type new_state) noexcept

state_type	release () noexcept

Protected Types
enum class	LogLevel { none = -1 , error = LIBEVDEV_LOG_ERROR , info = LIBEVDEV_LOG_INFO , debug = LIBEVDEV_LOG_DEBUG }
	Helper enum to use the logging functions. More...

Protected Member Functions
	Device (LogLevel priority)
	Constructor to enable logging.

	Device (LogLevel priority, int fd)
	Constructor to enable logging, and a non-owning device file descriptor.

	Device (LogLevel priority, const std::filesystem::path &filename, int flags=O_RDONLY\|O_NONBLOCK)
	Constructor to enable logging and a device filename.

void	create (LogLevel priority)
	Constructor to enable logging, in-place.

void	create (LogLevel priority, int fd)
	Constructor to enable logging, and a non-owning device file descriptor, in-place.

void	create (LogLevel priority, const std::filesystem::path &filename, int flags=O_RDONLY\|O_NONBLOCK)
	Constructor to enable logging and a device filename, in-place.

Protected Member Functions inherited from basic_wrapper< libevdev * >
	~basic_wrapper () noexcept=default

	~basic_wrapper () noexcept=default

Additional Inherited Members
Public Types inherited from basic_wrapper< libevdev * >
using	raw_type

using	state_type

Static Public Attributes inherited from basic_wrapper< libevdev * >
static constexpr raw_type	invalid_value

static constexpr raw_type	invalid_value

Protected Attributes inherited from basic_wrapper< libevdev * >
libevdev *	raw

libevdev *	raw

Detailed Description

Represents a device (real or not).

In order to use the logging function, the log() method must be overridden in a derived class, and a protected constructor (that takes a Device::LogLevel argument) must be called explicitly.

Class Documentation

◆ evdev::Device::DelayPeriod

struct evdev::Device::DelayPeriod

Class Members
int	delay
int	period

Member Enumeration Documentation

◆ LogLevel

enum class LogLevel

strongprotected

Helper enum to use the logging functions.

Enumerator
none	Invalid level.
error	Error level.
info	Information level.
debug	Debug level.

Constructor & Destructor Documentation

◆ Device() [1/8]

Device ( LogLevel priority )

protected

Constructor to enable logging.

Parameters

priority The priority level; the log() method will only be called when the message has this priority or above.

See also: log()

◆ Device() [2/8]

Device	(	LogLevel	priority,
		int	fd )

protected

Constructor to enable logging, and a non-owning device file descriptor.

Parameters

priority	The priority level; the log() method will only be called when the message has this priority or above.
fd	File descriptor fot the device file (from `/dev/input/event*`) that will be used for I/O. Ownership is not taken over this, so the file will not be closed on destruction.

See also: log()

◆ Device() [3/8]

Device	(	LogLevel	priority,
		const std::filesystem::path &	filename,
		int	flags = O_RDONLY\|O_NONBLOCK )

protected

Constructor to enable logging and a device filename.

Parameters

priority	The priority level; the log() method will only be called when the message has this priority or above.
filename	Path to to an evdev device (from `/dev/input/event*`) that will be open by this device.
flags	Flags used in the `open` system call.

See also: log()

◆ Device() [4/8]

Device ( std::nullptr_t )

noexcept

Construct invalid device.

In an invalid state, most operations are not allowed. You can safely destroy, move and check for validity.

◆ Device() [5/8]

Device ( )

Default constructor.

No device file is associated with this device. For this to have any use, the user must later do either:

call open() to open a device file.
call set_fd() to supply a device file descriptor.
pass it to a Uinput object, that will turn it into a virtual device.

See also: open(); set_fd(); Uinput

◆ Device() [6/8]

Device ( int fd )

Construct form a device file descriptor.

The file descriptor is not owned: it won't be closed during destruction.

See also: set_fd()

◆ Device() [7/8]

Device	(	const std::filesystem::path &	filename,
		int	flags = O_RDONLY\|O_NONBLOCK )

Construct from a device file path.

◆ ~Device()

~Device ( )

noexcept

◆ Device() [8/8]

Device ( Device && other )

noexcept

Move constructor.

Member Function Documentation

◆ acquire() [1/2]

void acquire	(	libevdev *	new_raw,
		int	new_fd )

noexcept

◆ acquire() [2/2]

void acquire ( state_type new_state )

noexcept

◆ change_fd()

void change_fd ( int fd )

Change the file descriptor used internally, without re-reading the actual device.

This is only useful if you need to close and reopen the file descriptor.

◆ create() [1/6]

void create ( )

Create a new instance, in-place.

No device file is associated with this device. For this to have any use, the user must later do either:

call open() to open a device file.
call set_fd() to supply a device file descriptor.
pass it to a Uinput object, that will turn it into a virtual device.

See also: open(); set_fd(); Uinput

◆ create() [2/6]

void create	(	const std::filesystem::path &	filename,
		int	flags = O_RDONLY\|O_NONBLOCK )

Construct from a device file path, in-place.

◆ create() [3/6]

void create ( int fd )

Construct form a device file descriptor, in-place.

The file descriptor is not owned: it won't be closed during destruction.

See also: set_fd()

◆ create() [4/6]

void create ( LogLevel priority )

protected

Constructor to enable logging, in-place.

Parameters

priority The priority level; the log() method will only be called when the message has this priority or above.

See also: log()

◆ create() [5/6]

void create	(	LogLevel	priority,
		const std::filesystem::path &	filename,
		int	flags = O_RDONLY\|O_NONBLOCK )

protected

Constructor to enable logging and a device filename, in-place.

Parameters

priority	The priority level; the log() method will only be called when the message has this priority or above.
filename	Path to to an evdev device (from `/dev/input/event*`) that will be open by this device.
flags	Flags used in the `open` system call.

See also: log()

◆ create() [6/6]

void create	(	LogLevel	priority,
		int	fd )

protected

Constructor to enable logging, and a non-owning device file descriptor, in-place.

Parameters

priority	The priority level; the log() method will only be called when the message has this priority or above.
fd	File descriptor fot the device file (from `/dev/input/event*`) that will be used for I/O. Ownership is not taken over this, so the file will not be closed on destruction.

See also: log()

◆ destroy()

void destroy ( )

overridevirtualnoexcept

free all allocated resources and make the instance invalid.

The result is the same as if this object was moved from.

Implements basic_wrapper< libevdev * >.

◆ disable() [1/4]

void disable ( const TypeCode & tc )

◆ disable() [2/4]

void disable ( Property prop )

◆ disable() [3/4]

void disable ( Type type )

◆ disable() [4/4]

void disable	(	Type	type,
		Code	code )

◆ enable() [1/4]

void enable ( const TypeCode & tc )

◆ enable() [2/4]

void enable ( Property prop )

◆ enable() [3/4]

void enable ( Type type )

◆ enable() [4/4]

void enable	(	Type	type,
		Code	code )

◆ enable_abs() [1/2]

void enable_abs ( Code code )

◆ enable_abs() [2/2]

void enable_abs	(	Code	code,
		const AbsInfo &	info )

◆ enable_key()

void enable_key ( Code code )

◆ enable_rel()

void enable_rel ( Code code )

◆ enable_rep()

void enable_rep	(	Code	code,
		int	arg )

◆ get_abs_flat()

int get_abs_flat ( Code code ) const

nodiscardnoexcept

◆ get_abs_fuzz()

int get_abs_fuzz ( Code code ) const

nodiscardnoexcept

◆ get_abs_info()

AbsInfo get_abs_info ( Code code ) const

nodiscard

◆ get_abs_max()

int get_abs_max ( Code code ) const

nodiscardnoexcept

◆ get_abs_min()

int get_abs_min ( Code code ) const

nodiscardnoexcept

◆ get_abs_res()

int get_abs_res ( Code code ) const

nodiscardnoexcept

◆ get_bustype()

std::uint16_t get_bustype ( ) const

nodiscardnoexcept

◆ get_codes() [1/2]

std::vector< Code > get_codes ( Type type ) const

nodiscard

◆ get_codes() [2/2]

std::vector< Code > get_codes	(	Type	type,
		Code	max ) const

nodiscard

◆ get_current_slot()

int get_current_slot ( ) const

nodiscardnoexcept

◆ get_driver_version()

int get_driver_version ( ) const

nodiscardnoexcept

◆ get_fd()

int get_fd ( ) const

Return the internal file descriptor used to access the device file.

◆ get_name()

std::string get_name ( ) const

nodiscard

◆ get_nonblock()

bool get_nonblock ( ) const

nodiscard

Get the owned file handle's O_NONBLOCK flag.

◆ get_num_slots()

int get_num_slots ( ) const

◆ get_phys()

std::optional< std::string > get_phys ( ) const

nodiscard

◆ get_product()

std::uint16_t get_product ( ) const

nodiscardnoexcept

◆ get_properties()

std::vector< Property > get_properties ( ) const

nodiscard

◆ get_repeat()

bool get_repeat	(	int &	delay,
		int &	period ) const

noexcept

◆ get_slot()

int get_slot	(	unsigned	slot,
		Code	code ) const

nodiscardnoexcept

◆ get_types()

std::vector< Type > get_types ( ) const

nodiscard

◆ get_uniq()

std::optional< std::string > get_uniq ( ) const

nodiscard

◆ get_value() [1/2]

int get_value ( const TypeCode & tc ) const

nodiscardnoexcept

◆ get_value() [2/2]

int get_value	(	Type	type,
		Code	code ) const

nodiscardnoexcept

◆ get_vendor()

std::uint16_t get_vendor ( ) const

nodiscardnoexcept

◆ get_version()

std::uint16_t get_version ( ) const

nodiscardnoexcept

◆ grab()

void grab ( )

Grab the device through a EVIOCGRAB syscall.

Use Grabber to grab and ungrab with exception-safety.

Exceptions

std::system_error

See also: Grabber

◆ has() [1/4]

bool has ( const TypeCode & tc ) const

nodiscardnoexcept

◆ has() [2/4]

bool has ( Property prop ) const

nodiscardnoexcept

◆ has() [3/4]

bool has ( Type type ) const

nodiscardnoexcept

◆ has() [4/4]

bool has	(	Type	type,
		Code	code ) const

nodiscardnoexcept

◆ has_pending()

bool has_pending ( )

nodiscard

◆ is_open()

bool is_open ( ) const

nodiscardnoexcept

Check if a file was opened with open().

◆ log()

virtual void log	(	LogLevel	priority,
		const char *	file,
		int	line,
		const char *	func,
		const char *	format,
		std::va_list	args ) const

virtualnoexcept

◆ open()

void open	(	const std::filesystem::path &	filename,
		int	flags = O_RDONLY\|O_NONBLOCK )

Open a device file and set it for the device.

This Device instance must have been default-constructed for this to work. The file handle is owned by Device, you don't have to close it explicitly.

◆ operator=()

Device & operator= ( Device && other )

noexcept

Move assignment.

◆ read() [1/2]

ReadStatus read	(	Event &	event,
		ReadFlag	flags = ReadFlag::normal )

nodiscardnoexcept

◆ read() [2/2]

Event read ( ReadFlag flags = ReadFlag::normal )

◆ release()

state_type release ( )

noexcept

◆ set_abs_flat()

void set_abs_flat	(	Code	code,
		int	val )

noexcept

◆ set_abs_fuzz()

void set_abs_fuzz	(	Code	code,
		int	val )

noexcept

◆ set_abs_info()

void set_abs_info	(	Code	code,
		const AbsInfo &	abs )

noexcept

◆ set_abs_max()

void set_abs_max	(	Code	code,
		int	val )

noexcept

◆ set_abs_min()

void set_abs_min	(	Code	code,
		int	val )

noexcept

◆ set_abs_res()

void set_abs_res	(	Code	code,
		int	val )

noexcept

◆ set_bustype()

void set_bustype ( std::uint16_t bus )

noexcept

◆ set_clock_id()

void set_clock_id ( int clockid )

◆ set_fd()

void set_fd ( int fd )

Set a file descriptor and read the device metadata.

You can only call this function once.

◆ set_kernel_abs_info()

void set_kernel_abs_info	(	Code	code,
		const AbsInfo &	abs )

◆ set_kernel_led_value()

void set_kernel_led_value	(	Code	code,
		libevdev_led_value	value )

◆ set_name()

void set_name ( const std::string & name )

noexcept

◆ set_nonblock()

void set_nonblock ( bool enable )

Set the owned file handle's O_NONBLOCK flag.

◆ set_phys()

void set_phys ( const std::string & phys )

noexcept

◆ set_product()

void set_product ( std::uint16_t pid )

noexcept

◆ set_slot()

void set_slot	(	unsigned	slot,
		Code	code,
		int	value )

◆ set_uniq()

void set_uniq ( const std::string & uniq )

noexcept

◆ set_value() [1/2]

void set_value	(	const TypeCode &	tc,
		int	value )

◆ set_value() [2/2]

void set_value	(	Type	type,
		Code	code,
		int	value )

◆ set_vendor()

void set_vendor ( std::uint16_t vid )

noexcept

◆ set_version()

void set_version ( std::uint16_t ver )

noexcept

◆ try_get_num_slots()

std::optional< int > try_get_num_slots ( ) const

nodiscardnoexcept

◆ try_get_repeat()

std::optional< DelayPeriod > try_get_repeat ( ) const

nodiscardnoexcept

◆ try_get_slot()

std::optional< int > try_get_slot	(	unsigned	slot,
		Code	code ) const

nodiscardnoexcept

◆ try_get_value() [1/2]

std::optional< int > try_get_value ( const TypeCode & tc ) const

nodiscardnoexcept

◆ try_get_value() [2/2]

std::optional< int > try_get_value	(	Type	type,
		Code	code ) const

nodiscardnoexcept

◆ ungrab()

void ungrab ( )

Ungrab the device.

Exceptions

std::system_error

See also: Grabber

The documentation for this class was generated from the following file:

Device.hpp

Classes

Public Member Functions

Protected Types

Protected Member Functions

Additional Inherited Members

Detailed Description

Class Documentation

◆ evdev::Device::DelayPeriod

Member Enumeration Documentation

◆ LogLevel

Constructor & Destructor Documentation

◆ Device() [1/8]

◆ Device() [2/8]

◆ Device() [3/8]

◆ Device() [4/8]

◆ Device() [5/8]

◆ Device() [6/8]

◆ Device() [7/8]

◆ ~Device()

◆ Device() [8/8]

Member Function Documentation

◆ acquire() [1/2]

◆ acquire() [2/2]

◆ change_fd()

◆ create() [1/6]

◆ create() [2/6]

◆ create() [3/6]

◆ create() [4/6]

◆ create() [5/6]

◆ create() [6/6]

◆ destroy()

◆ disable() [1/4]

◆ disable() [2/4]

◆ disable() [3/4]

◆ disable() [4/4]

◆ enable() [1/4]

◆ enable() [2/4]

◆ enable() [3/4]

◆ enable() [4/4]

◆ enable_abs() [1/2]

◆ enable_abs() [2/2]

◆ enable_key()

◆ enable_rel()

◆ enable_rep()

◆ get_abs_flat()

◆ get_abs_fuzz()

◆ get_abs_info()

◆ get_abs_max()

◆ get_abs_min()

◆ get_abs_res()

◆ get_bustype()

◆ get_codes() [1/2]

◆ get_codes() [2/2]

◆ get_current_slot()

◆ get_driver_version()

◆ get_fd()

◆ get_name()

◆ get_nonblock()

◆ get_num_slots()

◆ get_phys()

◆ get_product()

◆ get_properties()

◆ get_repeat()

◆ get_slot()

◆ get_types()

◆ get_uniq()

◆ get_value() [1/2]

◆ get_value() [2/2]

◆ get_vendor()

◆ get_version()

◆ grab()

◆ has() [1/4]

◆ has() [2/4]

◆ has() [3/4]

◆ has() [4/4]

◆ has_pending()

◆ is_open()

◆ log()

◆ open()

◆ operator=()